bitmessage/Jabit
bitmessage/Jabit
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Merge branch 'feature/kotlin' into develop

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This commit is contained in:
Christian Basler 2017-07-07 22:12:54 +02:00
commit 0478431c9c
265 changed files with 14587 additions and 16540 deletions
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55
build.gradle
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@ -1,22 +1,38 @@
buildscript {
ext.kotlin_version = '1.1.3'
repositories {
mavenCentral()
}
dependencies {
classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
}
}
plugins { plugins {
id 'com.github.ben-manes.versions' version '0.14.0' id 'com.github.ben-manes.versions' version '0.15.0'
id "io.spring.dependency-management" version "1.0.3.RELEASE"
} }
subprojects { subprojects {
apply plugin: 'java' apply plugin: 'kotlin'
apply plugin: 'maven' apply plugin: 'maven'
apply plugin: 'signing' apply plugin: 'signing'
apply plugin: 'jacoco' apply plugin: 'jacoco'
apply plugin: 'gitflow-version' apply plugin: 'gitflow-version'
apply plugin: 'io.spring.dependency-management'
apply plugin: 'com.github.ben-manes.versions' apply plugin: 'com.github.ben-manes.versions'
sourceCompatibility = 1.7 sourceCompatibility = 1.7
targetCompatibility = 1.7
group = 'ch.dissem.jabit' group = 'ch.dissem.jabit'
repositories { repositories {
mavenCentral() mavenCentral()
maven { url 'https://oss.sonatype.org/content/repositories/snapshots/' } maven { url 'https://oss.sonatype.org/content/repositories/snapshots/' }
} }
dependencies {
compile "org.jetbrains.kotlin:kotlin-stdlib-jre7"
compile "org.jetbrains.kotlin:kotlin-reflect"
}
test { test {
testLogging { testLogging {
@ -38,6 +54,14 @@ subprojects {
archives javadocJar, sourcesJar archives javadocJar, sourcesJar
} }
jar {
manifest {
attributes 'Implementation-Title': "Jabit ${project.name.capitalize()}",
'Implementation-Version': version
}
baseName "jabit-${project.name}"
}
signing { signing {
required { isRelease && project.getProperties().get("signing.keyId")?.length() > 0 } required { isRelease && project.getProperties().get("signing.keyId")?.length() > 0 }
sign configurations.archives sign configurations.archives
@ -93,4 +117,31 @@ subprojects {
} }
check.dependsOn jacocoTestReport check.dependsOn jacocoTestReport
dependencyManagement {
dependencies {
dependencySet(group: 'org.jetbrains.kotlin', version: "$kotlin_version") {
entry 'kotlin-stdlib-jre7'
entry 'kotlin-reflect'
}
dependencySet(group: 'org.slf4j', version: '1.7.25') {
entry 'slf4j-api'
entry 'slf4j-simple'
}
dependency 'ch.dissem.msgpack:msgpack:1.0.0'
dependency 'org.bouncycastle:bcprov-jdk15on:1.57'
dependency 'com.madgag.spongycastle:prov:1.56.0.0'
dependency 'org.apache.commons:commons-lang3:3.6'
dependency 'org.flywaydb:flyway-core:4.2.0'
dependency 'args4j:args4j:2.33'
dependency 'org.ini4j:ini4j:0.5.4'
dependency 'com.h2database:h2:1.4.196'
dependency 'junit:junit:4.12'
dependency 'org.hamcrest:hamcrest-library:1.3'
dependency 'com.nhaarman:mockito-kotlin:1.5.0'
}
}
} }

22
core/build.gradle
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@ -24,10 +24,28 @@ artifacts {
} }
dependencies { dependencies {
compile 'org.slf4j:slf4j-api:1.7.25' compile 'org.slf4j:slf4j-api'
compile 'ch.dissem.msgpack:msgpack:1.0.0' compile 'ch.dissem.msgpack:msgpack:1.0.0'
testCompile 'junit:junit:4.12' testCompile 'junit:junit:4.12'
testCompile 'org.hamcrest:hamcrest-library:1.3' testCompile 'org.hamcrest:hamcrest-library:1.3'
testCompile 'org.mockito:mockito-core:2.7.21' testCompile 'com.nhaarman:mockito-kotlin:1.5.0'
testCompile project(':cryptography-bc') testCompile project(':cryptography-bc')
} }
def generatedResources = "${project.buildDir}/generated-resources/main"
sourceSets {
main {
output.dir(generatedResources, builtBy: 'generateVersionInfo')
}
}
task('generateVersionInfo') {
doLast {
def dir = new File(generatedResources)
if (!dir.exists()) {
dir.mkdirs()
}
def file = new File(generatedResources, "version")
file.write(project.version.toString())
}
}

437
core/src/main/java/ch/dissem/bitmessage/BitmessageContext.java
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@ -1,437 +0,0 @@
/*
* Copyright 2015 Christian Basler
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package ch.dissem.bitmessage;
import ch.dissem.bitmessage.entity.*;
import ch.dissem.bitmessage.entity.payload.Broadcast;
import ch.dissem.bitmessage.entity.payload.ObjectType;
import ch.dissem.bitmessage.entity.payload.Pubkey.Feature;
import ch.dissem.bitmessage.entity.valueobject.PrivateKey;
import ch.dissem.bitmessage.exception.DecryptionFailedException;
import ch.dissem.bitmessage.factory.Factory;
import ch.dissem.bitmessage.ports.*;
import ch.dissem.bitmessage.utils.Property;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.net.InetAddress;
import java.util.List;
import java.util.concurrent.CancellationException;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.Future;
import static ch.dissem.bitmessage.InternalContext.NETWORK_EXTRA_BYTES;
import static ch.dissem.bitmessage.InternalContext.NETWORK_NONCE_TRIALS_PER_BYTE;
import static ch.dissem.bitmessage.entity.Plaintext.Type.BROADCAST;
import static ch.dissem.bitmessage.entity.Plaintext.Type.MSG;
import static ch.dissem.bitmessage.utils.UnixTime.HOUR;
import static ch.dissem.bitmessage.utils.UnixTime.MINUTE;
/**
* <p>Use this class if you want to create a Bitmessage client.</p>
* You'll need the Builder to create a BitmessageContext, and set the following properties:
* <ul>
* <li>addressRepo</li>
* <li>inventory</li>
* <li>nodeRegistry</li>
* <li>networkHandler</li>
* <li>messageRepo</li>
* <li>streams</li>
* </ul>
* <p>The default implementations in the different module builds can be used.</p>
* <p>The port defaults to 8444 (the default Bitmessage port)</p>
*/
public class BitmessageContext {
public static final int CURRENT_VERSION = 3;
private final static Logger LOG = LoggerFactory.getLogger(BitmessageContext.class);
private final InternalContext ctx;
private final Labeler labeler;
private final boolean sendPubkeyOnIdentityCreation;
private BitmessageContext(Builder builder) {
ctx = new InternalContext(builder);
labeler = builder.labeler;
ctx.getProofOfWorkService().doMissingProofOfWork(30_000); // TODO: this should be configurable
sendPubkeyOnIdentityCreation = builder.sendPubkeyOnIdentityCreation;
if (builder.listener instanceof Listener.WithContext) {
((Listener.WithContext) builder.listener).setContext(this);
}
}
public AddressRepository addresses() {
return ctx.getAddressRepository();
}
public MessageRepository messages() {
return ctx.getMessageRepository();
}
public Labeler labeler() {
return labeler;
}
public BitmessageAddress createIdentity(boolean shorter, Feature... features) {
final BitmessageAddress identity = new BitmessageAddress(new PrivateKey(
shorter,
ctx.getStreams()[0],
NETWORK_NONCE_TRIALS_PER_BYTE,
NETWORK_EXTRA_BYTES,
features
));
ctx.getAddressRepository().save(identity);
if (sendPubkeyOnIdentityCreation) {
ctx.sendPubkey(identity, identity.getStream());
}
return identity;
}
public BitmessageAddress joinChan(String passphrase, String address) {
BitmessageAddress chan = BitmessageAddress.chan(address, passphrase);
chan.setAlias(passphrase);
ctx.getAddressRepository().save(chan);
return chan;
}
public BitmessageAddress createChan(String passphrase) {
// FIXME: hardcoded stream number
BitmessageAddress chan = BitmessageAddress.chan(1, passphrase);
ctx.getAddressRepository().save(chan);
return chan;
}
public List<BitmessageAddress> createDeterministicAddresses(
String passphrase, int numberOfAddresses, long version, long stream, boolean shorter) {
List<BitmessageAddress> result = BitmessageAddress.deterministic(
passphrase, numberOfAddresses, version, stream, shorter);
for (int i = 0; i < result.size(); i++) {
BitmessageAddress address = result.get(i);
address.setAlias("deterministic (" + (i + 1) + ")");
ctx.getAddressRepository().save(address);
}
return result;
}
public void broadcast(final BitmessageAddress from, final String subject, final String message) {
Plaintext msg = new Plaintext.Builder(BROADCAST)
.from(from)
.message(subject, message)
.build();
send(msg);
}
public void send(final BitmessageAddress from, final BitmessageAddress to, final String subject, final String message) {
if (from.getPrivateKey() == null) {
throw new IllegalArgumentException("'From' must be an identity, i.e. have a private key.");
}
Plaintext msg = new Plaintext.Builder(MSG)
.from(from)
.to(to)
.message(subject, message)
.build();
send(msg);
}
public void send(final Plaintext msg) {
if (msg.getFrom() == null || msg.getFrom().getPrivateKey() == null) {
throw new IllegalArgumentException("'From' must be an identity, i.e. have a private key.");
}
labeler().markAsSending(msg);
BitmessageAddress to = msg.getTo();
if (to != null) {
if (to.getPubkey() == null) {
LOG.info("Public key is missing from recipient. Requesting.");
ctx.requestPubkey(to);
}
if (to.getPubkey() == null) {
ctx.getMessageRepository().save(msg);
}
}
if (to == null || to.getPubkey() != null) {
LOG.info("Sending message.");
ctx.getMessageRepository().save(msg);
if (msg.getType() == MSG) {
ctx.send(msg);
} else {
ctx.send(
msg.getFrom(),
to,
Factory.getBroadcast(msg),
msg.getTTL()
);
}
}
}
public void startup() {
ctx.getNetworkHandler().start();
}
public void shutdown() {
ctx.getNetworkHandler().stop();
}
/**
* @param host a trusted node that must be reliable (it's used for every synchronization)
* @param port of the trusted host, default is 8444
* @param timeoutInSeconds synchronization should end no later than about 5 seconds after the timeout elapsed, even
* if not all objects were fetched
* @param wait waits for the synchronization thread to finish
*/
public void synchronize(InetAddress host, int port, long timeoutInSeconds, boolean wait) {
Future<?> future = ctx.getNetworkHandler().synchronize(host, port, timeoutInSeconds);
if (wait) {
try {
future.get();
} catch (InterruptedException e) {
LOG.info("Thread was interrupted. Trying to shut down synchronization and returning.");
future.cancel(true);
} catch (CancellationException | ExecutionException e) {
LOG.debug(e.getMessage(), e);
}
}
}
/**
* Send a custom message to a specific node (that should implement handling for this message type) and returns
* the response, which in turn is expected to be a {@link CustomMessage}.
*
* @param server the node's address
* @param port the node's port
* @param request the request
* @return the response
*/
public CustomMessage send(InetAddress server, int port, CustomMessage request) {
return ctx.getNetworkHandler().send(server, port, request);
}
/**
* Removes expired objects from the inventory. You should call this method regularly,
* e.g. daily and on each shutdown.
*/
public void cleanup() {
ctx.getInventory().cleanup();
}
/**
* Sends messages again whose time to live expired without being acknowledged. (And whose
* recipient is expected to send acknowledgements.
* <p>
* You should call this method regularly, but be aware of the following:
* <ul>
* <li>As messages might be sent, POW will be done. It is therefore not advised to
* call it on shutdown.</li>
* <li>It shouldn't be called right after startup, as it's possible the missing
* acknowledgement was sent while the client was offline.</li>
* <li>Other than that, the call isn't expensive as long as there is no message
* to send, so it might be a good idea to just call it every few minutes.</li>
* </ul>
*/
public void resendUnacknowledgedMessages() {
ctx.resendUnacknowledged();
}
public boolean isRunning() {
return ctx.getNetworkHandler().isRunning();
}
public void addContact(BitmessageAddress contact) {
ctx.getAddressRepository().save(contact);
if (contact.getPubkey() == null) {
BitmessageAddress stored = ctx.getAddressRepository().getAddress(contact.getAddress());
if (stored.getPubkey() == null) {
ctx.requestPubkey(contact);
}
}
}
public void addSubscribtion(BitmessageAddress address) {
address.setSubscribed(true);
ctx.getAddressRepository().save(address);
tryToFindBroadcastsForAddress(address);
}
private void tryToFindBroadcastsForAddress(BitmessageAddress address) {
for (ObjectMessage object : ctx.getInventory().getObjects(address.getStream(), Broadcast.getVersion(address), ObjectType.BROADCAST)) {
try {
Broadcast broadcast = (Broadcast) object.getPayload();
broadcast.decrypt(address);
// This decrypts it twice, but on the other hand it doesn't try to decrypt the objects with
// other subscriptions and the interface stays as simple as possible.
ctx.getNetworkListener().receive(object);
} catch (DecryptionFailedException ignore) {
} catch (Exception e) {
LOG.debug(e.getMessage(), e);
}
}
}
public Property status() {
return new Property("status", null,
ctx.getNetworkHandler().getNetworkStatus(),
new Property("unacknowledged", ctx.getMessageRepository().findMessagesToResend().size())
);
}
/**
* Returns the {@link InternalContext} - normally you wouldn't need it,
* unless you are doing something crazy with the protocol.
*/
public InternalContext internals() {
return ctx;
}
public interface Listener {
void receive(Plaintext plaintext);
/**
* A message listener that needs a {@link BitmessageContext}, i.e. for implementing some sort of chat bot.
*/
interface WithContext extends Listener {
void setContext(BitmessageContext ctx);
}
}
public static final class Builder {
int port = 8444;
Inventory inventory;
NodeRegistry nodeRegistry;
NetworkHandler networkHandler;
AddressRepository addressRepo;
MessageRepository messageRepo;
ProofOfWorkRepository proofOfWorkRepository;
ProofOfWorkEngine proofOfWorkEngine;
Cryptography cryptography;
CustomCommandHandler customCommandHandler;
Labeler labeler;
Listener listener;
int connectionLimit = 150;
long connectionTTL = 30 * MINUTE;
boolean sendPubkeyOnIdentityCreation = true;
public Builder port(int port) {
this.port = port;
return this;
}
public Builder inventory(Inventory inventory) {
this.inventory = inventory;
return this;
}
public Builder nodeRegistry(NodeRegistry nodeRegistry) {
this.nodeRegistry = nodeRegistry;
return this;
}
public Builder networkHandler(NetworkHandler networkHandler) {
this.networkHandler = networkHandler;
return this;
}
public Builder addressRepo(AddressRepository addressRepo) {
this.addressRepo = addressRepo;
return this;
}
public Builder messageRepo(MessageRepository messageRepo) {
this.messageRepo = messageRepo;
return this;
}
public Builder powRepo(ProofOfWorkRepository proofOfWorkRepository) {
this.proofOfWorkRepository = proofOfWorkRepository;
return this;
}
public Builder cryptography(Cryptography cryptography) {
this.cryptography = cryptography;
return this;
}
public Builder customCommandHandler(CustomCommandHandler handler) {
this.customCommandHandler = handler;
return this;
}
public Builder proofOfWorkEngine(ProofOfWorkEngine proofOfWorkEngine) {
this.proofOfWorkEngine = proofOfWorkEngine;
return this;
}
public Builder labeler(Labeler labeler) {
this.labeler = labeler;
return this;
}
public Builder listener(Listener listener) {
this.listener = listener;
return this;
}
public Builder connectionLimit(int connectionLimit) {
this.connectionLimit = connectionLimit;
return this;
}
public Builder connectionTTL(int hours) {
this.connectionTTL = hours * HOUR;
return this;
}
/**
* By default a client will send the public key when an identity is being created. On weaker devices
* this behaviour might not be desirable.
*/
public Builder doNotSendPubkeyOnIdentityCreation() {
this.sendPubkeyOnIdentityCreation = false;
return this;
}
public BitmessageContext build() {
nonNull("inventory", inventory);
nonNull("nodeRegistry", nodeRegistry);
nonNull("networkHandler", networkHandler);
nonNull("addressRepo", addressRepo);
nonNull("messageRepo", messageRepo);
nonNull("proofOfWorkRepo", proofOfWorkRepository);
if (proofOfWorkEngine == null) {
proofOfWorkEngine = new MultiThreadedPOWEngine();
}
if (labeler == null) {
labeler = new DefaultLabeler();
}
if (customCommandHandler == null) {
customCommandHandler = new CustomCommandHandler() {
@Override
public MessagePayload handle(CustomMessage request) {
LOG.debug("Received custom request, but no custom command handler configured.");
return null;
}
};
}
return new BitmessageContext(this);
}
private void nonNull(String name, Object o) {
if (o == null) throw new IllegalStateException(name + " must not be null");
}
}
}

191
core/src/main/java/ch/dissem/bitmessage/DefaultMessageListener.java
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@ -1,191 +0,0 @@
/*
* Copyright 2015 Christian Basler
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package ch.dissem.bitmessage;
import ch.dissem.bitmessage.entity.BitmessageAddress;
import ch.dissem.bitmessage.entity.ObjectMessage;
import ch.dissem.bitmessage.entity.Plaintext;
import ch.dissem.bitmessage.entity.payload.*;
import ch.dissem.bitmessage.entity.valueobject.InventoryVector;
import ch.dissem.bitmessage.exception.DecryptionFailedException;
import ch.dissem.bitmessage.ports.Labeler;
import ch.dissem.bitmessage.ports.NetworkHandler;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.IOException;
import java.util.Arrays;
import java.util.List;
import static ch.dissem.bitmessage.entity.Plaintext.Status.PUBKEY_REQUESTED;
class DefaultMessageListener implements NetworkHandler.MessageListener, InternalContext.ContextHolder {
private final static Logger LOG = LoggerFactory.getLogger(DefaultMessageListener.class);
private final Labeler labeler;
private final BitmessageContext.Listener listener;
private InternalContext ctx;
public DefaultMessageListener(Labeler labeler, BitmessageContext.Listener listener) {
this.labeler = labeler;
this.listener = listener;
}
@Override
public void setContext(InternalContext context) {
this.ctx = context;
}
@Override
@SuppressWarnings("ConstantConditions")
public void receive(ObjectMessage object) throws IOException {
ObjectPayload payload = object.getPayload();
if (payload.getType() == null) {
if (payload instanceof GenericPayload) {
receive((GenericPayload) payload);
}
return;
}
switch (payload.getType()) {
case GET_PUBKEY: {
receive(object, (GetPubkey) payload);
break;
}
case PUBKEY: {
receive(object, (Pubkey) payload);
break;
}
case MSG: {
receive(object, (Msg) payload);
break;
}
case BROADCAST: {
receive(object, (Broadcast) payload);
break;
}
default: {
throw new IllegalArgumentException("Unknown payload type " + payload.getType());
}
}
}
protected void receive(ObjectMessage object, GetPubkey getPubkey) {
BitmessageAddress identity = ctx.getAddressRepository().findIdentity(getPubkey.getRipeTag());
if (identity != null && identity.getPrivateKey() != null && !identity.isChan()) {
LOG.info("Got pubkey request for identity " + identity);
// FIXME: only send pubkey if it wasn't sent in the last TTL.pubkey() days
ctx.sendPubkey(identity, object.getStream());
}
}
protected void receive(ObjectMessage object, Pubkey pubkey) throws IOException {
BitmessageAddress address;
try {
if (pubkey instanceof V4Pubkey) {
V4Pubkey v4Pubkey = (V4Pubkey) pubkey;
address = ctx.getAddressRepository().findContact(v4Pubkey.getTag());
if (address != null) {
v4Pubkey.decrypt(address.getPublicDecryptionKey());
}
} else {
address = ctx.getAddressRepository().findContact(pubkey.getRipe());
}
if (address != null && address.getPubkey() == null) {
updatePubkey(address, pubkey);
}
} catch (DecryptionFailedException ignore) {
}
}
private void updatePubkey(BitmessageAddress address, Pubkey pubkey) {
address.setPubkey(pubkey);
LOG.info("Got pubkey for contact " + address);
ctx.getAddressRepository().save(address);
List<Plaintext> messages = ctx.getMessageRepository().findMessages(PUBKEY_REQUESTED, address);
LOG.info("Sending " + messages.size() + " messages for contact " + address);
for (Plaintext msg : messages) {
ctx.getLabeler().markAsSending(msg);
ctx.getMessageRepository().save(msg);
ctx.send(msg);
}
}
protected void receive(ObjectMessage object, Msg msg) throws IOException {
for (BitmessageAddress identity : ctx.getAddressRepository().getIdentities()) {
try {
msg.decrypt(identity.getPrivateKey().getPrivateEncryptionKey());
Plaintext plaintext = msg.getPlaintext();
plaintext.setTo(identity);
if (!object.isSignatureValid(plaintext.getFrom().getPubkey())) {
LOG.warn("Msg with IV " + object.getInventoryVector() + " was successfully decrypted, but signature check failed. Ignoring.");
} else {
receive(object.getInventoryVector(), plaintext);
}
break;
} catch (DecryptionFailedException ignore) {
}
}
}
protected void receive(GenericPayload ack) {
if (ack.getData().length == Msg.ACK_LENGTH) {
Plaintext msg = ctx.getMessageRepository().getMessageForAck(ack.getData());
if (msg != null) {
ctx.getLabeler().markAsAcknowledged(msg);
ctx.getMessageRepository().save(msg);
}
}
}
protected void receive(ObjectMessage object, Broadcast broadcast) throws IOException {
byte[] tag = broadcast instanceof V5Broadcast ? ((V5Broadcast) broadcast).getTag() : null;
for (BitmessageAddress subscription : ctx.getAddressRepository().getSubscriptions(broadcast.getVersion())) {
if (tag != null && !Arrays.equals(tag, subscription.getTag())) {
continue;
}
try {
broadcast.decrypt(subscription.getPublicDecryptionKey());
if (!object.isSignatureValid(broadcast.getPlaintext().getFrom().getPubkey())) {
LOG.warn("Broadcast with IV " + object.getInventoryVector() + " was successfully decrypted, but signature check failed. Ignoring.");
} else {
receive(object.getInventoryVector(), broadcast.getPlaintext());
}
} catch (DecryptionFailedException ignore) {
}
}
}
protected void receive(InventoryVector iv, Plaintext msg) {
BitmessageAddress contact = ctx.getAddressRepository().getAddress(msg.getFrom().getAddress());
if (contact != null && contact.getPubkey() == null) {
updatePubkey(contact, msg.getFrom().getPubkey());
}
msg.setInventoryVector(iv);
labeler.setLabels(msg);
ctx.getMessageRepository().save(msg);
listener.receive(msg);
if (msg.getType() == Plaintext.Type.MSG && msg.getTo().has(Pubkey.Feature.DOES_ACK)) {
ObjectMessage ack = msg.getAckMessage();
if (ack != null) {
ctx.getInventory().storeObject(ack);
ctx.getNetworkHandler().offer(ack.getInventoryVector());
}
}
}
}

326
core/src/main/java/ch/dissem/bitmessage/InternalContext.java
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@ -1,326 +0,0 @@
/*
* Copyright 2015 Christian Basler
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package ch.dissem.bitmessage;
import ch.dissem.bitmessage.entity.*;
import ch.dissem.bitmessage.entity.payload.*;
import ch.dissem.bitmessage.exception.ApplicationException;
import ch.dissem.bitmessage.ports.*;
import ch.dissem.bitmessage.utils.Singleton;
import ch.dissem.bitmessage.utils.TTL;
import ch.dissem.bitmessage.utils.UnixTime;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.IOException;
import java.util.Arrays;
import java.util.List;
import java.util.TreeSet;
import java.util.concurrent.Executor;
import java.util.concurrent.Executors;
/**
* The internal context should normally only be used for port implementations. If you need it in your client
* implementation, you're either doing something wrong, something very weird, or the BitmessageContext should
* get extended.
* <p>
* On the other hand, if you need the BitmessageContext in a port implementation, the same thing might apply.
* </p>
*/
public class InternalContext {
private final static Logger LOG = LoggerFactory.getLogger(InternalContext.class);
public final static long NETWORK_NONCE_TRIALS_PER_BYTE = 1000;
public final static long NETWORK_EXTRA_BYTES = 1000;
private final Executor threadPool = Executors.newCachedThreadPool();
private final Cryptography cryptography;
private final Inventory inventory;
private final NodeRegistry nodeRegistry;
private final NetworkHandler networkHandler;
private final AddressRepository addressRepository;
private final MessageRepository messageRepository;
private final ProofOfWorkRepository proofOfWorkRepository;
private final ProofOfWorkEngine proofOfWorkEngine;
private final CustomCommandHandler customCommandHandler;
private final ProofOfWorkService proofOfWorkService;
private final Labeler labeler;
private final NetworkHandler.MessageListener networkListener;
private final TreeSet<Long> streams = new TreeSet<>();
private final int port;
private final long clientNonce;
private long connectionTTL;
private int connectionLimit;
public InternalContext(BitmessageContext.Builder builder) {
this.cryptography = builder.cryptography;
this.inventory = builder.inventory;
this.nodeRegistry = builder.nodeRegistry;
this.networkHandler = builder.networkHandler;
this.addressRepository = builder.addressRepo;
this.messageRepository = builder.messageRepo;
this.proofOfWorkRepository = builder.proofOfWorkRepository;
this.proofOfWorkService = new ProofOfWorkService();
this.proofOfWorkEngine = builder.proofOfWorkEngine;
this.clientNonce = cryptography.randomNonce();
this.customCommandHandler = builder.customCommandHandler;
this.port = builder.port;
this.connectionLimit = builder.connectionLimit;
this.connectionTTL = builder.connectionTTL;
this.labeler = builder.labeler;
this.networkListener = new DefaultMessageListener(labeler, builder.listener);
Singleton.initialize(cryptography);
// TODO: streams of new identities and subscriptions should also be added. This works only after a restart.
for (BitmessageAddress address : addressRepository.getIdentities()) {
streams.add(address.getStream());
}
for (BitmessageAddress address : addressRepository.getSubscriptions()) {
streams.add(address.getStream());
}
if (streams.isEmpty()) {
streams.add(1L);
}
init(cryptography, inventory, nodeRegistry, networkHandler, addressRepository, messageRepository,
proofOfWorkRepository, proofOfWorkService, proofOfWorkEngine, customCommandHandler, builder.labeler,
networkListener);
for (BitmessageAddress identity : addressRepository.getIdentities()) {
streams.add(identity.getStream());
}
}
private void init(Object... objects) {
for (Object o : objects) {
if (o instanceof ContextHolder) {
((ContextHolder) o).setContext(this);
}
}
}
public Cryptography getCryptography() {
return cryptography;
}
public Inventory getInventory() {
return inventory;
}
public NodeRegistry getNodeRegistry() {
return nodeRegistry;
}
public NetworkHandler getNetworkHandler() {
return networkHandler;
}
public AddressRepository getAddressRepository() {
return addressRepository;
}
public MessageRepository getMessageRepository() {
return messageRepository;
}
public ProofOfWorkRepository getProofOfWorkRepository() {
return proofOfWorkRepository;
}
public ProofOfWorkEngine getProofOfWorkEngine() {
return proofOfWorkEngine;
}
public ProofOfWorkService getProofOfWorkService() {
return proofOfWorkService;
}
public Labeler getLabeler() {
return labeler;
}
public NetworkHandler.MessageListener getNetworkListener() {
return networkListener;
}
public long[] getStreams() {
long[] result = new long[streams.size()];
int i = 0;
for (long stream : streams) {
result[i++] = stream;
}
return result;
}
public int getPort() {
return port;
}
public void send(final Plaintext plaintext) {
if (plaintext.getAckMessage() != null) {
long expires = UnixTime.now(+plaintext.getTTL());
LOG.info("Expires at " + expires);
proofOfWorkService.doProofOfWorkWithAck(plaintext, expires);
} else {
send(plaintext.getFrom(), plaintext.getTo(), new Msg(plaintext), plaintext.getTTL());
}
}
public void send(final BitmessageAddress from, BitmessageAddress to, final ObjectPayload payload,
final long timeToLive) {
try {
final BitmessageAddress recipient = (to != null ? to : from);
long expires = UnixTime.now(+timeToLive);
LOG.info("Expires at " + expires);
final ObjectMessage object = new ObjectMessage.Builder()
.stream(recipient.getStream())
.expiresTime(expires)
.payload(payload)
.build();
if (object.isSigned()) {
object.sign(from.getPrivateKey());
}
if (payload instanceof Broadcast) {
((Broadcast) payload).encrypt();
} else if (payload instanceof Encrypted) {
object.encrypt(recipient.getPubkey());
}
proofOfWorkService.doProofOfWork(to, object);
} catch (IOException e) {
throw new ApplicationException(e);
}
}
public void sendPubkey(final BitmessageAddress identity, final long targetStream) {
try {
long expires = UnixTime.now(TTL.pubkey());
LOG.info("Expires at " + expires);
final ObjectMessage response = new ObjectMessage.Builder()
.stream(targetStream)
.expiresTime(expires)
.payload(identity.getPubkey())
.build();
response.sign(identity.getPrivateKey());
response.encrypt(cryptography.createPublicKey(identity.getPublicDecryptionKey()));
// TODO: remember that the pubkey is just about to be sent, and on which stream!
proofOfWorkService.doProofOfWork(response);
} catch (IOException e) {
throw new ApplicationException(e);
}
}
/**
* Be aware that if the pubkey already exists in the inventory, the metods will not request it and the callback
* for freshly received pubkeys will not be called. Instead the pubkey is added to the contact and stored on DB.
*/
public void requestPubkey(final BitmessageAddress contact) {
threadPool.execute(new Runnable() {
@Override
public void run() {
BitmessageAddress stored = addressRepository.getAddress(contact.getAddress());
tryToFindMatchingPubkey(contact);
if (contact.getPubkey() != null) {
if (stored != null) {
stored.setPubkey(contact.getPubkey());
addressRepository.save(stored);
} else {
addressRepository.save(contact);
}
return;
}
if (stored == null) {
addressRepository.save(contact);
}
long expires = UnixTime.now(TTL.getpubkey());
LOG.info("Expires at " + expires);
final ObjectMessage request = new ObjectMessage.Builder()
.stream(contact.getStream())
.expiresTime(expires)
.payload(new GetPubkey(contact))
.build();
proofOfWorkService.doProofOfWork(request);
}
});
}
private void tryToFindMatchingPubkey(BitmessageAddress address) {
BitmessageAddress stored = addressRepository.getAddress(address.getAddress());
if (stored != null) {
address.setAlias(stored.getAlias());
address.setSubscribed(stored.isSubscribed());
}
for (ObjectMessage object : inventory.getObjects(address.getStream(), address.getVersion(), ObjectType.PUBKEY)) {
try {
Pubkey pubkey = (Pubkey) object.getPayload();
if (address.getVersion() == 4) {
V4Pubkey v4Pubkey = (V4Pubkey) pubkey;
if (Arrays.equals(address.getTag(), v4Pubkey.getTag())) {
v4Pubkey.decrypt(address.getPublicDecryptionKey());
if (object.isSignatureValid(v4Pubkey)) {
address.setPubkey(v4Pubkey);
addressRepository.save(address);
break;
} else {
LOG.info("Found pubkey for " + address + " but signature is invalid");
}
}
} else {
if (Arrays.equals(pubkey.getRipe(), address.getRipe())) {
address.setPubkey(pubkey);
addressRepository.save(address);
break;
}
}
} catch (Exception e) {
LOG.debug(e.getMessage(), e);
}
}
}
public void resendUnacknowledged() {
List<Plaintext> messages = messageRepository.findMessagesToResend();
for (Plaintext message : messages) {
send(message);
messageRepository.save(message);
}
}
public long getClientNonce() {
return clientNonce;
}
public long getConnectionTTL() {
return connectionTTL;
}
public int getConnectionLimit() {
return connectionLimit;
}
public CustomCommandHandler getCustomCommandHandler() {
return customCommandHandler;
}
public interface ContextHolder {
void setContext(InternalContext context);
}
}

125
core/src/main/java/ch/dissem/bitmessage/ProofOfWorkService.java
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@ -1,125 +0,0 @@
package ch.dissem.bitmessage;
import ch.dissem.bitmessage.entity.*;
import ch.dissem.bitmessage.entity.payload.Msg;
import ch.dissem.bitmessage.entity.payload.Pubkey;
import ch.dissem.bitmessage.ports.Cryptography;
import ch.dissem.bitmessage.ports.MessageRepository;
import ch.dissem.bitmessage.ports.ProofOfWorkEngine;
import ch.dissem.bitmessage.ports.ProofOfWorkRepository;
import ch.dissem.bitmessage.ports.ProofOfWorkRepository.Item;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.IOException;
import java.util.List;
import java.util.Timer;
import java.util.TimerTask;
import static ch.dissem.bitmessage.InternalContext.NETWORK_EXTRA_BYTES;
import static ch.dissem.bitmessage.InternalContext.NETWORK_NONCE_TRIALS_PER_BYTE;
import static ch.dissem.bitmessage.utils.Singleton.cryptography;
/**
* @author Christian Basler
*/
public class ProofOfWorkService implements ProofOfWorkEngine.Callback, InternalContext.ContextHolder {
private final static Logger LOG = LoggerFactory.getLogger(ProofOfWorkService.class);
private Cryptography cryptography;
private InternalContext ctx;
private ProofOfWorkRepository powRepo;
private MessageRepository messageRepo;
public void doMissingProofOfWork(long delayInMilliseconds) {
final List<byte[]> items = powRepo.getItems();
if (items.isEmpty()) return;
// Wait for 30 seconds, to let the application start up before putting heavy load on the CPU
new Timer().schedule(new TimerTask() {
@Override
public void run() {
LOG.info("Doing POW for " + items.size() + " tasks.");
for (byte[] initialHash : items) {
Item item = powRepo.getItem(initialHash);
cryptography.doProofOfWork(item.object, item.nonceTrialsPerByte, item.extraBytes,
ProofOfWorkService.this);
}
}
}, delayInMilliseconds);
}
public void doProofOfWork(ObjectMessage object) {
doProofOfWork(null, object);
}
public void doProofOfWork(BitmessageAddress recipient, ObjectMessage object) {
Pubkey pubkey = recipient == null ? null : recipient.getPubkey();
long nonceTrialsPerByte = pubkey == null ? NETWORK_NONCE_TRIALS_PER_BYTE : pubkey.getNonceTrialsPerByte();
long extraBytes = pubkey == null ? NETWORK_EXTRA_BYTES : pubkey.getExtraBytes();
powRepo.putObject(object, nonceTrialsPerByte, extraBytes);
if (object.getPayload() instanceof PlaintextHolder) {
Plaintext plaintext = ((PlaintextHolder) object.getPayload()).getPlaintext();
plaintext.setInitialHash(cryptography.getInitialHash(object));
messageRepo.save(plaintext);
}
cryptography.doProofOfWork(object, nonceTrialsPerByte, extraBytes, this);
}
public void doProofOfWorkWithAck(Plaintext plaintext, long expirationTime) {
final ObjectMessage ack = plaintext.getAckMessage();
messageRepo.save(plaintext);
Item item = new Item(ack, NETWORK_NONCE_TRIALS_PER_BYTE, NETWORK_EXTRA_BYTES,
expirationTime, plaintext);
powRepo.putObject(item);
cryptography.doProofOfWork(ack, NETWORK_NONCE_TRIALS_PER_BYTE, NETWORK_EXTRA_BYTES, this);
}
@Override
public void onNonceCalculated(byte[] initialHash, byte[] nonce) {
Item item = powRepo.getItem(initialHash);
if (item.message == null) {
ObjectMessage object = item.object;
object.setNonce(nonce);
Plaintext plaintext = messageRepo.getMessage(initialHash);
if (plaintext != null) {
plaintext.setInventoryVector(object.getInventoryVector());
plaintext.updateNextTry();
ctx.getLabeler().markAsSent(plaintext);
messageRepo.save(plaintext);
}
try {
ctx.getNetworkListener().receive(object);
} catch (IOException e) {
LOG.debug(e.getMessage(), e);
}
ctx.getInventory().storeObject(object);
ctx.getNetworkHandler().offer(object.getInventoryVector());
} else {
item.message.getAckMessage().setNonce(nonce);
final ObjectMessage object = new ObjectMessage.Builder()
.stream(item.message.getStream())
.expiresTime(item.expirationTime)
.payload(new Msg(item.message))
.build();
if (object.isSigned()) {
object.sign(item.message.getFrom().getPrivateKey());
}
if (object.getPayload() instanceof Encrypted) {
object.encrypt(item.message.getTo().getPubkey());
}
doProofOfWork(item.message.getTo(), object);
}
powRepo.removeObject(initialHash);
}
@Override
public void setContext(InternalContext ctx) {
this.ctx = ctx;
this.cryptography = cryptography();
this.powRepo = ctx.getProofOfWorkRepository();
this.messageRepo = ctx.getMessageRepository();
}
}

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core/src/main/java/ch/dissem/bitmessage/entity/Addr.java
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@ -1,83 +0,0 @@
/*
* Copyright 2015 Christian Basler
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package ch.dissem.bitmessage.entity;
import ch.dissem.bitmessage.entity.valueobject.NetworkAddress;
import ch.dissem.bitmessage.utils.Encode;
import java.io.IOException;
import java.io.OutputStream;
import java.nio.ByteBuffer;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
/**
* The 'addr' command holds a list of known active Bitmessage nodes.
*/
public class Addr implements MessagePayload {
private static final long serialVersionUID = -5117688017050138720L;
private final List<NetworkAddress> addresses;
private Addr(Builder builder) {
addresses = builder.addresses;
}
@Override
public Command getCommand() {
return Command.ADDR;
}
public List<NetworkAddress> getAddresses() {
return addresses;
}
@Override
public void write(OutputStream out) throws IOException {
Encode.varInt(addresses.size(), out);
for (NetworkAddress address : addresses) {
address.write(out);
}
}
@Override
public void write(ByteBuffer buffer) {
Encode.varInt(addresses.size(), buffer);
for (NetworkAddress address : addresses) {
address.write(buffer);
}
}
public static final class Builder {
private List<NetworkAddress> addresses = new ArrayList<>();
public Builder addresses(Collection<NetworkAddress> addresses){
this.addresses.addAll(addresses);
return this;
}
public Builder addAddress(final NetworkAddress address) {
this.addresses.add(address);
return this;
}
public Addr build() {
return new Addr(this);
}
}
}

277
core/src/main/java/ch/dissem/bitmessage/entity/BitmessageAddress.java
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@ -1,277 +0,0 @@
/*
* Copyright 2015 Christian Basler
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package ch.dissem.bitmessage.entity;
import ch.dissem.bitmessage.entity.payload.Pubkey;
import ch.dissem.bitmessage.entity.payload.Pubkey.Feature;
import ch.dissem.bitmessage.entity.payload.V4Pubkey;
import ch.dissem.bitmessage.entity.valueobject.PrivateKey;
import ch.dissem.bitmessage.exception.ApplicationException;
import ch.dissem.bitmessage.utils.AccessCounter;
import ch.dissem.bitmessage.utils.Base58;
import ch.dissem.bitmessage.utils.Bytes;
import ch.dissem.bitmessage.utils.Encode;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.Serializable;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.Objects;
import static ch.dissem.bitmessage.utils.Decode.bytes;
import static ch.dissem.bitmessage.utils.Decode.varInt;
import static ch.dissem.bitmessage.utils.Singleton.cryptography;
/**
* A Bitmessage address. Can be a user's private address, an address string without public keys or a recipient's address
* holding private keys.
*/
public class BitmessageAddress implements Serializable {
private static final long serialVersionUID = 2386328540805994064L;
private final long version;
private final long stream;
private final byte[] ripe;
private final byte[] tag;
/**
* Used for V4 address encryption. It's easier to just create it regardless of address version.
*/
private final byte[] publicDecryptionKey;
private String address;
private PrivateKey privateKey;
private Pubkey pubkey;
private String alias;
private boolean subscribed;
private boolean chan;
BitmessageAddress(long version, long stream, byte[] ripe) {
try {
this.version = version;
this.stream = stream;
this.ripe = ripe;
ByteArrayOutputStream os = new ByteArrayOutputStream();
Encode.varInt(version, os);
Encode.varInt(stream, os);
if (version < 4) {
byte[] checksum = cryptography().sha512(os.toByteArray(), ripe);
this.tag = null;
this.publicDecryptionKey = Arrays.copyOfRange(checksum, 0, 32);
} else {
// for tag and decryption key, the checksum has to be created with 0x00 padding
byte[] checksum = cryptography().doubleSha512(os.toByteArray(), ripe);
this.tag = Arrays.copyOfRange(checksum, 32, 64);
this.publicDecryptionKey = Arrays.copyOfRange(checksum, 0, 32);
}
// but for the address and its checksum they need to be stripped
int offset = Bytes.numberOfLeadingZeros(ripe);
os.write(ripe, offset, ripe.length - offset);
byte[] checksum = cryptography().doubleSha512(os.toByteArray());
os.write(checksum, 0, 4);
this.address = "BM-" + Base58.encode(os.toByteArray());
} catch (IOException e) {
throw new ApplicationException(e);
}
}
public BitmessageAddress(Pubkey publicKey) {
this(publicKey.getVersion(), publicKey.getStream(), publicKey.getRipe());
this.pubkey = publicKey;
}
public BitmessageAddress(String address, String passphrase) {
this(address);
this.privateKey = new PrivateKey(this, passphrase);
this.pubkey = this.privateKey.getPubkey();
if (!Arrays.equals(ripe, privateKey.getPubkey().getRipe())) {
throw new IllegalArgumentException("Wrong address or passphrase");
}
}
public static BitmessageAddress chan(String address, String passphrase) {
BitmessageAddress result = new BitmessageAddress(address, passphrase);
result.chan = true;
return result;
}
public static BitmessageAddress chan(long stream, String passphrase) {
PrivateKey privateKey = new PrivateKey(Pubkey.LATEST_VERSION, stream, passphrase);
BitmessageAddress result = new BitmessageAddress(privateKey);
result.chan = true;
return result;
}
public static List<BitmessageAddress> deterministic(String passphrase, int numberOfAddresses,
long version, long stream, boolean shorter) {
List<BitmessageAddress> result = new ArrayList<>(numberOfAddresses);
List<PrivateKey> privateKeys = PrivateKey.deterministic(passphrase, numberOfAddresses, version, stream, shorter);
for (PrivateKey pk : privateKeys) {
result.add(new BitmessageAddress(pk));
}
return result;
}
public BitmessageAddress(PrivateKey privateKey) {
this(privateKey.getPubkey());
this.privateKey = privateKey;
}
public BitmessageAddress(String address) {
try {
this.address = address;
byte[] bytes = Base58.decode(address.substring(3));
ByteArrayInputStream in = new ByteArrayInputStream(bytes);
AccessCounter counter = new AccessCounter();
this.version = varInt(in, counter);
this.stream = varInt(in, counter);
this.ripe = Bytes.expand(bytes(in, bytes.length - counter.length() - 4), 20);
// test checksum
byte[] checksum = cryptography().doubleSha512(bytes, bytes.length - 4);
byte[] expectedChecksum = bytes(in, 4);
for (int i = 0; i < 4; i++) {
if (expectedChecksum[i] != checksum[i])
throw new IllegalArgumentException("Checksum of address failed");
}
if (version < 4) {
checksum = cryptography().sha512(Arrays.copyOfRange(bytes, 0, counter.length()), ripe);
this.tag = null;
this.publicDecryptionKey = Arrays.copyOfRange(checksum, 0, 32);
} else {
checksum = cryptography().doubleSha512(Arrays.copyOfRange(bytes, 0, counter.length()), ripe);
this.tag = Arrays.copyOfRange(checksum, 32, 64);
this.publicDecryptionKey = Arrays.copyOfRange(checksum, 0, 32);
}
} catch (IOException e) {
throw new ApplicationException(e);
}
}
public static byte[] calculateTag(long version, long stream, byte[] ripe) {
try {
ByteArrayOutputStream out = new ByteArrayOutputStream();
Encode.varInt(version, out);
Encode.varInt(stream, out);
out.write(ripe);
return Arrays.copyOfRange(cryptography().doubleSha512(out.toByteArray()), 32, 64);
} catch (IOException e) {
throw new ApplicationException(e);
}
}
public long getStream() {
return stream;
}
public long getVersion() {
return version;
}
public Pubkey getPubkey() {
return pubkey;
}
public void setPubkey(Pubkey pubkey) {
if (pubkey instanceof V4Pubkey) {
if (!Arrays.equals(tag, ((V4Pubkey) pubkey).getTag()))
throw new IllegalArgumentException("Pubkey has incompatible tag");
}
if (!Arrays.equals(ripe, pubkey.getRipe()))
throw new IllegalArgumentException("Pubkey has incompatible ripe");
this.pubkey = pubkey;
}
/**
* @return the private key used to decrypt Pubkey objects (for v4 addresses) and broadcasts.
*/
public byte[] getPublicDecryptionKey() {
return publicDecryptionKey;
}
public PrivateKey getPrivateKey() {
return privateKey;
}
public String getAddress() {
return address;
}
public String getAlias() {
return alias;
}
public void setAlias(String alias) {
this.alias = alias;
}
@Override
public String toString() {
return alias == null ? address : alias;
}
public byte[] getRipe() {
return ripe;
}
public byte[] getTag() {
return tag;
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
BitmessageAddress address = (BitmessageAddress) o;
return Objects.equals(version, address.version) &&
Objects.equals(stream, address.stream) &&
Arrays.equals(ripe, address.ripe);
}
@Override
public int hashCode() {
return Arrays.hashCode(ripe);
}
public boolean isSubscribed() {
return subscribed;
}
public void setSubscribed(boolean subscribed) {
this.subscribed = subscribed;
}
public boolean isChan() {
return chan;
}
public void setChan(boolean chan) {
this.chan = chan;
}
public boolean has(Feature feature) {
if (pubkey == null || feature == null) {
return false;
}
return feature.isActive(pubkey.getBehaviorBitfield());
}
}

111
core/src/main/java/ch/dissem/bitmessage/entity/CustomMessage.java
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@ -1,111 +0,0 @@
/*
* Copyright 2015 Christian Basler
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package ch.dissem.bitmessage.entity;
import ch.dissem.bitmessage.exception.ApplicationException;
import ch.dissem.bitmessage.utils.AccessCounter;
import ch.dissem.bitmessage.utils.Encode;
import java.io.*;
import java.nio.ByteBuffer;
import static ch.dissem.bitmessage.utils.Decode.bytes;
import static ch.dissem.bitmessage.utils.Decode.varString;
/**
* @author Christian Basler
*/
public class CustomMessage implements MessagePayload {
private static final long serialVersionUID = -8932056829480326011L;
public static final String COMMAND_ERROR = "ERROR";
private final String command;
private final byte[] data;
public CustomMessage(String command) {
this.command = command;
this.data = null;
}
public CustomMessage(String command, byte[] data) {
this.command = command;
this.data = data;
}
public static CustomMessage read(InputStream in, int length) throws IOException {
AccessCounter counter = new AccessCounter();
return new CustomMessage(varString(in, counter), bytes(in, length - counter.length()));
}
@Override
public Command getCommand() {
return Command.CUSTOM;
}
public String getCustomCommand() {
return command;
}
public byte[] getData() {
if (data != null) {
return data;
} else {
try {
ByteArrayOutputStream out = new ByteArrayOutputStream();
write(out);
return out.toByteArray();
} catch (IOException e) {
throw new ApplicationException(e);
}
}
}
@Override
public void write(OutputStream out) throws IOException {
if (data != null) {
Encode.varString(command, out);
out.write(data);
} else {
throw new ApplicationException("Tried to write custom message without data. " +
"Programmer: did you forget to override #write()?");
}
}
@Override
public void write(ByteBuffer buffer) {
if (data != null) {
Encode.varString(command, buffer);
buffer.put(data);
} else {
throw new ApplicationException("Tried to write custom message without data. " +
"Programmer: did you forget to override #write()?");
}
}
public boolean isError() {
return COMMAND_ERROR.equals(command);
}
public static CustomMessage error(String message) {
try {
return new CustomMessage(COMMAND_ERROR, message.getBytes("UTF-8"));
} catch (UnsupportedEncodingException e) {
throw new ApplicationException(e);
}
}
}

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core/src/main/java/ch/dissem/bitmessage/entity/GetData.java
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@ -1,84 +0,0 @@
/*
* Copyright 2015 Christian Basler
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package ch.dissem.bitmessage.entity;
import ch.dissem.bitmessage.entity.valueobject.InventoryVector;
import ch.dissem.bitmessage.utils.Encode;
import java.io.IOException;
import java.io.OutputStream;
import java.nio.ByteBuffer;
import java.util.LinkedList;
import java.util.List;
/**
* The 'getdata' command is used to request objects from a node.
*/
public class GetData implements MessagePayload {
private static final long serialVersionUID = 1433878785969631061L;
public static final int MAX_INVENTORY_SIZE = 50_000;
List<InventoryVector> inventory;
private GetData(Builder builder) {
inventory = builder.inventory;
}
@Override
public Command getCommand() {
return Command.GETDATA;
}
public List<InventoryVector> getInventory() {
return inventory;
}
@Override
public void write(OutputStream out) throws IOException {
Encode.varInt(inventory.size(), out);
for (InventoryVector iv : inventory) {
iv.write(out);
}
}
@Override
public void write(ByteBuffer buffer) {
Encode.varInt(inventory.size(), buffer);
for (InventoryVector iv : inventory) {
iv.write(buffer);
}
}
public static final class Builder {
private List<InventoryVector> inventory = new LinkedList<>();
public Builder addInventoryVector(InventoryVector inventoryVector) {
this.inventory.add(inventoryVector);
return this;
}
public Builder inventory(List<InventoryVector> inventory) {
this.inventory = inventory;
return this;
}
public GetData build() {
return new GetData(this);
}
}
}

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core/src/main/java/ch/dissem/bitmessage/entity/Inv.java
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@ -1,82 +0,0 @@
/*
* Copyright 2015 Christian Basler
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package ch.dissem.bitmessage.entity;
import ch.dissem.bitmessage.entity.valueobject.InventoryVector;
import ch.dissem.bitmessage.utils.Encode;
import java.io.IOException;
import java.io.OutputStream;
import java.nio.ByteBuffer;
import java.util.LinkedList;
import java.util.List;
/**
* The 'inv' command holds up to 50000 inventory vectors, i.e. hashes of inventory items.
*/
public class Inv implements MessagePayload {
private static final long serialVersionUID = 3662992522956947145L;
private List<InventoryVector> inventory;
private Inv(Builder builder) {
inventory = builder.inventory;
}
public List<InventoryVector> getInventory() {
return inventory;
}
@Override
public Command getCommand() {
return Command.INV;
}
@Override
public void write(OutputStream out) throws IOException {
Encode.varInt(inventory.size(), out);
for (InventoryVector iv : inventory) {
iv.write(out);
}
}
@Override
public void write(ByteBuffer buffer) {
Encode.varInt(inventory.size(), buffer);
for (InventoryVector iv : inventory) {
iv.write(buffer);
}
}
public static final class Builder {
private List<InventoryVector> inventory = new LinkedList<>();
public Builder addInventoryVector(InventoryVector inventoryVector) {
this.inventory.add(inventoryVector);
return this;
}
public Builder inventory(List<InventoryVector> inventory) {
this.inventory = inventory;
return this;
}
public Inv build() {
return new Inv(this);
}
}
}

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core/src/main/java/ch/dissem/bitmessage/entity/NetworkMessage.java
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/*
* Copyright 2015 Christian Basler
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package ch.dissem.bitmessage.entity;
import ch.dissem.bitmessage.exception.ApplicationException;
import ch.dissem.bitmessage.utils.Encode;
import java.io.IOException;
import java.io.OutputStream;
import java.io.UnsupportedEncodingException;
import java.nio.ByteBuffer;
import java.security.GeneralSecurityException;
import java.security.NoSuchAlgorithmException;
import java.security.NoSuchProviderException;
import static ch.dissem.bitmessage.utils.Singleton.cryptography;
/**
* A network message is exchanged between two nodes.
*/
public class NetworkMessage implements Streamable {
private static final long serialVersionUID = 702708857104464809L;
/**
* Magic value indicating message origin network, and used to seek to next message when stream state is unknown
*/
public final static int MAGIC = 0xE9BEB4D9;
public final static byte[] MAGIC_BYTES = ByteBuffer.allocate(4).putInt(MAGIC).array();
private final MessagePayload payload;
public NetworkMessage(MessagePayload payload) {
this.payload = payload;
}
/**
* First 4 bytes of sha512(payload)
*/
private byte[] getChecksum(byte[] bytes) throws NoSuchProviderException, NoSuchAlgorithmException {
byte[] d = cryptography().sha512(bytes);
return new byte[]{d[0], d[1], d[2], d[3]};
}
/**
* The actual data, a message or an object. Not to be confused with objectPayload.
*/
public MessagePayload getPayload() {
return payload;
}
@Override
public void write(OutputStream out) throws IOException {
// magic
Encode.int32(MAGIC, out);
// ASCII string identifying the packet content, NULL padded (non-NULL padding results in packet rejected)
String command = payload.getCommand().name().toLowerCase();
out.write(command.getBytes("ASCII"));
for (int i = command.length(); i < 12; i++) {
out.write('\0');
}
byte[] payloadBytes = Encode.bytes(payload);
// Length of payload in number of bytes. Because of other restrictions, there is no reason why this length would
// ever be larger than 1600003 bytes. Some clients include a sanity-check to avoid processing messages which are
// larger than this.
Encode.int32(payloadBytes.length, out);
// checksum
try {
out.write(getChecksum(payloadBytes));
} catch (GeneralSecurityException e) {
throw new ApplicationException(e);
}
// message payload
out.write(payloadBytes);
}
/**
* A more efficient implementation of the write method, writing header data to the provided buffer and returning
* a new buffer containing the payload.
*
* @param headerBuffer where the header data is written to (24 bytes)
* @return a buffer containing the payload, ready to be read.
*/
public ByteBuffer writeHeaderAndGetPayloadBuffer(ByteBuffer headerBuffer) {
return ByteBuffer.wrap(writeHeader(headerBuffer));
}
/**
* For improved memory efficiency, you should use {@link #writeHeaderAndGetPayloadBuffer(ByteBuffer)}
* and write the header buffer as well as the returned payload buffer into the channel.
*
* @param buffer where everything gets written to. Needs to be large enough for the whole message
* to be written.
*/
@Override
public void write(ByteBuffer buffer) {
byte[] payloadBytes = writeHeader(buffer);
buffer.put(payloadBytes);
}
private byte[] writeHeader(ByteBuffer out) {
// magic
Encode.int32(MAGIC, out);
// ASCII string identifying the packet content, NULL padded (non-NULL padding results in packet rejected)
String command = payload.getCommand().name().toLowerCase();
try {
out.put(command.getBytes("ASCII"));
} catch (UnsupportedEncodingException e) {
throw new ApplicationException(e);
}
for (int i = command.length(); i < 12; i++) {
out.put((byte) 0);
}
byte[] payloadBytes = Encode.bytes(payload);
// Length of payload in number of bytes. Because of other restrictions, there is no reason why this length would
// ever be larger than 1600003 bytes. Some clients include a sanity-check to avoid processing messages which are
// larger than this.
Encode.int32(payloadBytes.length, out);
// checksum
try {
out.put(getChecksum(payloadBytes));
} catch (GeneralSecurityException e) {
throw new ApplicationException(e);
}
// message payload
return payloadBytes;
}
}

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core/src/main/java/ch/dissem/bitmessage/entity/ObjectMessage.java
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/*
* Copyright 2015 Christian Basler
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package ch.dissem.bitmessage.entity;
import ch.dissem.bitmessage.entity.payload.ObjectPayload;
import ch.dissem.bitmessage.entity.payload.ObjectType;
import ch.dissem.bitmessage.entity.payload.Pubkey;
import ch.dissem.bitmessage.entity.valueobject.InventoryVector;
import ch.dissem.bitmessage.entity.valueobject.PrivateKey;
import ch.dissem.bitmessage.exception.ApplicationException;
import ch.dissem.bitmessage.exception.DecryptionFailedException;
import ch.dissem.bitmessage.utils.Bytes;
import ch.dissem.bitmessage.utils.Encode;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.nio.ByteBuffer;
import java.util.Arrays;
import java.util.Objects;
import static ch.dissem.bitmessage.utils.Singleton.cryptography;
/**
* The 'object' command sends an object that is shared throughout the network.
*/
public class ObjectMessage implements MessagePayload {
private static final long serialVersionUID = 2495752480120659139L;
private byte[] nonce;
private long expiresTime;
private long objectType;
/**
* The object's version
*/
private long version;
private long stream;
private ObjectPayload payload;
private byte[] payloadBytes;
private ObjectMessage(Builder builder) {
nonce = builder.nonce;
expiresTime = builder.expiresTime;
objectType = builder.objectType;
version = builder.payload.getVersion();
stream = builder.streamNumber > 0 ? builder.streamNumber : builder.payload.getStream();
payload = builder.payload;
}
@Override
public Command getCommand() {
return Command.OBJECT;
}
public byte[] getNonce() {
return nonce;
}
public void setNonce(byte[] nonce) {
this.nonce = nonce;
}
public long getExpiresTime() {
return expiresTime;
}
public long getType() {
return objectType;
}
public ObjectPayload getPayload() {
return payload;
}
public long getVersion() {
return version;
}
public long getStream() {
return stream;
}
public InventoryVector getInventoryVector() {
return InventoryVector.fromHash(
Bytes.truncate(cryptography().doubleSha512(nonce, getPayloadBytesWithoutNonce()), 32)
);
}
private boolean isEncrypted() {
return payload instanceof Encrypted && !((Encrypted) payload).isDecrypted();
}
public boolean isSigned() {
return payload.isSigned();
}
private byte[] getBytesToSign() {
try {
ByteArrayOutputStream out = new ByteArrayOutputStream();
writeHeaderWithoutNonce(out);
payload.writeBytesToSign(out);
return out.toByteArray();
} catch (IOException e) {
throw new ApplicationException(e);
}
}
public void sign(PrivateKey key) {
if (payload.isSigned()) {
payload.setSignature(cryptography().getSignature(getBytesToSign(), key));
}
}
public void decrypt(PrivateKey key) throws IOException, DecryptionFailedException {
if (payload instanceof Encrypted) {
((Encrypted) payload).decrypt(key.getPrivateEncryptionKey());
}
}
public void decrypt(byte[] privateEncryptionKey) throws IOException, DecryptionFailedException {
if (payload instanceof Encrypted) {
((Encrypted) payload).decrypt(privateEncryptionKey);
}
}
public void encrypt(byte[] publicEncryptionKey) throws IOException {
if (payload instanceof Encrypted) {
((Encrypted) payload).encrypt(publicEncryptionKey);
}
}
public void encrypt(Pubkey publicKey) {
try {
if (payload instanceof Encrypted) {
((Encrypted) payload).encrypt(publicKey.getEncryptionKey());
}
} catch (IOException e) {
throw new ApplicationException(e);
}
}
public boolean isSignatureValid(Pubkey pubkey) throws IOException {
if (isEncrypted()) throw new IllegalStateException("Payload must be decrypted first");
return cryptography().isSignatureValid(getBytesToSign(), payload.getSignature(), pubkey);
}
@Override
public void write(OutputStream out) throws IOException {
if (nonce == null) {
out.write(new byte[8]);
} else {
out.write(nonce);
}
out.write(getPayloadBytesWithoutNonce());
}
@Override
public void write(ByteBuffer buffer) {
if (nonce == null) {
buffer.put(new byte[8]);
} else {
buffer.put(nonce);
}
buffer.put(getPayloadBytesWithoutNonce());
}
private void writeHeaderWithoutNonce(OutputStream out) throws IOException {
Encode.int64(expiresTime, out);
Encode.int32(objectType, out);
Encode.varInt(version, out);
Encode.varInt(stream, out);
}
public byte[] getPayloadBytesWithoutNonce() {
try {
if (payloadBytes == null) {
ByteArrayOutputStream out = new ByteArrayOutputStream();
writeHeaderWithoutNonce(out);
payload.write(out);
payloadBytes = out.toByteArray();
}
return payloadBytes;
} catch (IOException e) {
throw new ApplicationException(e);
}
}
public static final class Builder {
private byte[] nonce;
private long expiresTime;
private long objectType = -1;
private long streamNumber;
private ObjectPayload payload;
public Builder nonce(byte[] nonce) {
this.nonce = nonce;
return this;
}
public Builder expiresTime(long expiresTime) {
this.expiresTime = expiresTime;
return this;
}
public Builder objectType(long objectType) {
this.objectType = objectType;
return this;
}
public Builder objectType(ObjectType objectType) {
this.objectType = objectType.getNumber();
return this;
}
public Builder stream(long streamNumber) {
this.streamNumber = streamNumber;
return this;
}
public Builder payload(ObjectPayload payload) {
this.payload = payload;
if (this.objectType == -1)
this.objectType = payload.getType().getNumber();
return this;
}
public ObjectMessage build() {
return new ObjectMessage(this);
}
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
ObjectMessage that = (ObjectMessage) o;
return expiresTime == that.expiresTime &&
objectType == that.objectType &&
version == that.version &&
stream == that.stream &&
Objects.equals(payload, that.payload);
}
@Override
public int hashCode() {
int result = Arrays.hashCode(nonce);
result = 31 * result + (int) (expiresTime ^ (expiresTime >>> 32));
result = 31 * result + (int) (objectType ^ (objectType >>> 32));
result = 31 * result + (int) (version ^ (version >>> 32));
result = 31 * result + (int) (stream ^ (stream >>> 32));
result = 31 * result + (payload != null ? payload.hashCode() : 0);
return result;
}
}

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core/src/main/java/ch/dissem/bitmessage/entity/Plaintext.java
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/*
* Copyright 2015 Christian Basler
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package ch.dissem.bitmessage.entity;
import ch.dissem.bitmessage.entity.payload.Msg;
import ch.dissem.bitmessage.entity.payload.Pubkey.Feature;
import ch.dissem.bitmessage.entity.valueobject.ExtendedEncoding;
import ch.dissem.bitmessage.entity.valueobject.InventoryVector;
import ch.dissem.bitmessage.entity.valueobject.Label;
import ch.dissem.bitmessage.entity.valueobject.extended.Attachment;
import ch.dissem.bitmessage.entity.valueobject.extended.Message;
import ch.dissem.bitmessage.exception.ApplicationException;
import ch.dissem.bitmessage.factory.ExtendedEncodingFactory;
import ch.dissem.bitmessage.factory.Factory;
import ch.dissem.bitmessage.utils.*;
import java.io.*;
import java.nio.ByteBuffer;
import java.util.*;
import java.util.Collections;
import static ch.dissem.bitmessage.entity.Plaintext.Encoding.EXTENDED;
import static ch.dissem.bitmessage.entity.Plaintext.Encoding.SIMPLE;
import static ch.dissem.bitmessage.utils.Singleton.cryptography;
/**
* The unencrypted message to be sent by 'msg' or 'broadcast'.
*/
public class Plaintext implements Streamable {
private static final long serialVersionUID = -5325729856394951079L;
private final Type type;
private final BitmessageAddress from;
private final long encoding;
private final byte[] message;
private final byte[] ackData;
private final UUID conversationId;
private ExtendedEncoding extendedData;
private ObjectMessage ackMessage;
private Object id;
private InventoryVector inventoryVector;
private BitmessageAddress to;
private byte[] signature;
private Status status;
private Long sent;
private Long received;
private Set<Label> labels;
private byte[] initialHash;
private long ttl;
private int retries;
private Long nextTry;
private Plaintext(Builder builder) {
id = builder.id;
inventoryVector = builder.inventoryVector;
type = builder.type;
from = builder.from;
to = builder.to;
encoding = builder.encoding;
message = builder.message;
ackData = builder.ackData;
if (builder.ackMessage != null && builder.ackMessage.length > 0) {
ackMessage = Factory.getObjectMessage(
3,
new ByteArrayInputStream(builder.ackMessage),
builder.ackMessage.length);
}
signature = builder.signature;
status = builder.status;
sent = builder.sent;
received = builder.received;
labels = builder.labels;
ttl = builder.ttl;
retries = builder.retries;
nextTry = builder.nextTry;
conversationId = builder.conversation;
}
public static Plaintext read(Type type, InputStream in) throws IOException {
return readWithoutSignature(type, in)
.signature(Decode.varBytes(in))
.received(UnixTime.now())
.build();
}
public static Plaintext.Builder readWithoutSignature(Type type, InputStream in) throws IOException {
long version = Decode.varInt(in);
return new Builder(type)
.addressVersion(version)
.stream(Decode.varInt(in))
.behaviorBitfield(Decode.int32(in))
.publicSigningKey(Decode.bytes(in, 64))
.publicEncryptionKey(Decode.bytes(in, 64))
.nonceTrialsPerByte(version >= 3 ? Decode.varInt(in) : 0)
.extraBytes(version >= 3 ? Decode.varInt(in) : 0)
.destinationRipe(type == Type.MSG ? Decode.bytes(in, 20) : null)
.encoding(Decode.varInt(in))
.message(Decode.varBytes(in))
.ackMessage(type == Type.MSG ? Decode.varBytes(in) : null);
}
public InventoryVector getInventoryVector() {
return inventoryVector;
}
public void setInventoryVector(InventoryVector inventoryVector) {
this.inventoryVector = inventoryVector;
}
public Type getType() {
return type;
}
public byte[] getMessage() {
return message;
}
public BitmessageAddress getFrom() {
return from;
}
public BitmessageAddress getTo() {
return to;
}
public void setTo(BitmessageAddress to) {
if (this.to.getVersion() != 0)
throw new IllegalStateException("Correct address already set");
if (!Arrays.equals(this.to.getRipe(), to.getRipe())) {
throw new IllegalArgumentException("RIPEs don't match");
}
this.to = to;
}
public Set<Label> getLabels() {
return labels;
}
public Encoding getEncoding() {
return Encoding.fromCode(encoding);
}
public long getStream() {
return from.getStream();
}
public byte[] getSignature() {
return signature;
}
public void setSignature(byte[] signature) {
this.signature = signature;
}
public boolean isUnread() {
for (Label label : labels) {
if (label.getType() == Label.Type.UNREAD) {
return true;
}
}
return false;
}
public void write(OutputStream out, boolean includeSignature) throws IOException {
Encode.varInt(from.getVersion(), out);
Encode.varInt(from.getStream(), out);
if (from.getPubkey() == null) {
Encode.int32(0, out);
byte[] empty = new byte[64];
out.write(empty);
out.write(empty);
if (from.getVersion() >= 3) {
Encode.varInt(0, out);
Encode.varInt(0, out);
}
} else {
Encode.int32(from.getPubkey().getBehaviorBitfield(), out);
out.write(from.getPubkey().getSigningKey(), 1, 64);
out.write(from.getPubkey().getEncryptionKey(), 1, 64);
if (from.getVersion() >= 3) {
Encode.varInt(from.getPubkey().getNonceTrialsPerByte(), out);
Encode.varInt(from.getPubkey().getExtraBytes(), out);
}
}
if (type == Type.MSG) {
out.write(to.getRipe());
}
Encode.varInt(encoding, out);
Encode.varInt(message.length, out);
out.write(message);
if (type == Type.MSG) {
if (to.has(Feature.DOES_ACK) && getAckMessage() != null) {
ByteArrayOutputStream ack = new ByteArrayOutputStream();
getAckMessage().write(ack);
Encode.varBytes(ack.toByteArray(), out);
} else {
Encode.varInt(0, out);
}
}
if (includeSignature) {
if (signature == null) {
Encode.varInt(0, out);
} else {
Encode.varInt(signature.length, out);
out.write(signature);
}
}
}
public void write(ByteBuffer buffer, boolean includeSignature) {
Encode.varInt(from.getVersion(), buffer);
Encode.varInt(from.getStream(), buffer);
if (from.getPubkey() == null) {
Encode.int32(0, buffer);
byte[] empty = new byte[64];
buffer.put(empty);
buffer.put(empty);
if (from.getVersion() >= 3) {
Encode.varInt(0, buffer);
Encode.varInt(0, buffer);
}
} else {
Encode.int32(from.getPubkey().getBehaviorBitfield(), buffer);
buffer.put(from.getPubkey().getSigningKey(), 1, 64);
buffer.put(from.getPubkey().getEncryptionKey(), 1, 64);
if (from.getVersion() >= 3) {
Encode.varInt(from.getPubkey().getNonceTrialsPerByte(), buffer);
Encode.varInt(from.getPubkey().getExtraBytes(), buffer);
}
}
if (type == Type.MSG) {
buffer.put(to.getRipe());
}
Encode.varInt(encoding, buffer);
Encode.varInt(message.length, buffer);
buffer.put(message);
if (type == Type.MSG) {
if (to.has(Feature.DOES_ACK) && getAckMessage() != null) {
Encode.varBytes(Encode.bytes(getAckMessage()), buffer);
} else {
Encode.varInt(0, buffer);
}
}
if (includeSignature) {
if (signature == null) {
Encode.varInt(0, buffer);
} else {
Encode.varInt(signature.length, buffer);
buffer.put(signature);
}
}
}
@Override
public void write(OutputStream out) throws IOException {
write(out, true);
}
@Override
public void write(ByteBuffer buffer) {
write(buffer, true);
}
public Object getId() {
return id;
}
public void setId(long id) {
if (this.id != null) throw new IllegalStateException("ID already set");
this.id = id;
}
public Long getSent() {
return sent;
}
public Long getReceived() {
return received;
}
public Status getStatus() {
return status;
}
public void setStatus(Status status) {
if (status != Status.RECEIVED && sent == null && status != Status.DRAFT) {
sent = UnixTime.now();
}
this.status = status;
}
public long getTTL() {
return ttl;
}
public int getRetries() {
return retries;
}
public Long getNextTry() {
return nextTry;
}
public void updateNextTry() {
if (to != null) {
if (nextTry == null) {
if (sent != null && to.has(Feature.DOES_ACK)) {
nextTry = UnixTime.now(+ttl);
retries++;
}
} else {
nextTry = nextTry + (1 << retries) * ttl;
retries++;
}
}
}
public String getSubject() {
Scanner s = new Scanner(new ByteArrayInputStream(message), "UTF-8");
String firstLine = s.nextLine();
if (encoding == EXTENDED.code) {
if (Message.TYPE.equals(getExtendedData().getType())) {
return ((Message) extendedData.getContent()).getSubject();
} else {
return null;
}
} else if (encoding == SIMPLE.code) {
return firstLine.substring("Subject:".length()).trim();
} else if (firstLine.length() > 50) {
return firstLine.substring(0, 50).trim() + "...";
} else {
return firstLine;
}
}
public String getText() {
if (encoding == EXTENDED.code) {
if (Message.TYPE.equals(getExtendedData().getType())) {
return ((Message) extendedData.getContent()).getBody();
} else {
return null;
}
} else {
try {
String text = new String(message, "UTF-8");
if (encoding == SIMPLE.code) {
return text.substring(text.indexOf("\nBody:") + 6);
}
return text;
} catch (UnsupportedEncodingException e) {
throw new ApplicationException(e);
}
}
}
protected ExtendedEncoding getExtendedData() {
if (extendedData == null && encoding == EXTENDED.code) {
// TODO: make sure errors are properly handled
extendedData = ExtendedEncodingFactory.getInstance().unzip(message);
}
return extendedData;
}
@SuppressWarnings("unchecked")
public <T extends ExtendedEncoding.ExtendedType> T getExtendedData(Class<T> type) {
ExtendedEncoding extendedData = getExtendedData();
if (extendedData == null) {
return null;
}
if (type == null || type.isInstance(extendedData.getContent())) {
return (T) extendedData.getContent();
}
return null;
}
public List<InventoryVector> getParents() {
if (getExtendedData() != null && Message.TYPE.equals(getExtendedData().getType())) {
return ((Message) extendedData.getContent()).getParents();
} else {
return Collections.emptyList();
}
}
public List<Attachment> getFiles() {
if (Message.TYPE.equals(getExtendedData().getType())) {
return ((Message) extendedData.getContent()).getFiles();
} else {
return Collections.emptyList();
}
}
public UUID getConversationId() {
return conversationId;
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
Plaintext plaintext = (Plaintext) o;
return Objects.equals(encoding, plaintext.encoding) &&
Objects.equals(from, plaintext.from) &&
Arrays.equals(message, plaintext.message) &&
Objects.equals(getAckMessage(), plaintext.getAckMessage()) &&
Arrays.equals(to == null ? null : to.getRipe(), plaintext.to == null ? null : plaintext.to.getRipe()) &&
Arrays.equals(signature, plaintext.signature) &&
Objects.equals(status, plaintext.status) &&
Objects.equals(sent, plaintext.sent) &&
Objects.equals(received, plaintext.received) &&
Objects.equals(labels, plaintext.labels);
}
@Override
public int hashCode() {
return Objects.hash(from, encoding, message, ackData, to, signature, status, sent, received, labels);
}
public void addLabels(Label... labels) {
if (labels != null) {
Collections.addAll(this.labels, labels);
}
}
public void addLabels(Collection<Label> labels) {
if (labels != null) {
this.labels.addAll(labels);
}
}
public void removeLabel(Label.Type type) {
Iterator<Label> iterator = labels.iterator();
while (iterator.hasNext()) {
Label label = iterator.next();
if (label.getType() == type) {
iterator.remove();
}
}
}
public byte[] getAckData() {
return ackData;
}
public ObjectMessage getAckMessage() {
if (ackMessage == null) {
ackMessage = Factory.createAck(this);
}
return ackMessage;
}
public void setInitialHash(byte[] initialHash) {
this.initialHash = initialHash;
}
public byte[] getInitialHash() {
return initialHash;
}
@Override
public String toString() {
String subject = getSubject();
if (subject == null || subject.length() == 0) {
return Strings.hex(initialHash).toString();
} else {
return subject;
}
}
public enum Encoding {
IGNORE(0), TRIVIAL(1), SIMPLE(2), EXTENDED(3);
long code;
Encoding(long code) {
this.code = code;
}
public long getCode() {
return code;
}
public static Encoding fromCode(long code) {
for (Encoding e : values()) {
if (e.getCode() == code) {
return e;
}
}
return null;
}
}
public enum Status {
DRAFT,
// For sent messages
PUBKEY_REQUESTED,
DOING_PROOF_OF_WORK,
SENT,
SENT_ACKNOWLEDGED,
RECEIVED
}
public enum Type {
MSG, BROADCAST
}
public static final class Builder {
private Object id;
private InventoryVector inventoryVector;
private Type type;
private BitmessageAddress from;
private BitmessageAddress to;
private long addressVersion;
private long stream;
private int behaviorBitfield;
private byte[] publicSigningKey;
private byte[] publicEncryptionKey;
private long nonceTrialsPerByte;
private long extraBytes;
private byte[] destinationRipe;
private long encoding;
private byte[] message = new byte[0];
private byte[] ackData;
private byte[] ackMessage;
private byte[] signature;
private Long sent;
private Long received;
private Status status;
private Set<Label> labels = new LinkedHashSet<>();
private long ttl;
private int retries;
private Long nextTry;
private UUID conversation;
public Builder(Type type) {
this.type = type;
}
public Builder id(Object id) {
this.id = id;
return this;
}
public Builder IV(InventoryVector iv) {
this.inventoryVector = iv;
return this;
}
public Builder from(BitmessageAddress address) {
from = address;
return this;
}
public Builder to(BitmessageAddress address) {
if (type != Type.MSG && to != null)
throw new IllegalArgumentException("recipient address only allowed for msg");
to = address;
return this;
}
private Builder addressVersion(long addressVersion) {
this.addressVersion = addressVersion;
return this;
}
private Builder stream(long stream) {
this.stream = stream;
return this;
}
private Builder behaviorBitfield(int behaviorBitfield) {
this.behaviorBitfield = behaviorBitfield;
return this;
}
private Builder publicSigningKey(byte[] publicSigningKey) {
this.publicSigningKey = publicSigningKey;
return this;
}
private Builder publicEncryptionKey(byte[] publicEncryptionKey) {
this.publicEncryptionKey = publicEncryptionKey;
return this;
}
private Builder nonceTrialsPerByte(long nonceTrialsPerByte) {
this.nonceTrialsPerByte = nonceTrialsPerByte;
return this;
}
private Builder extraBytes(long extraBytes) {
this.extraBytes = extraBytes;
return this;
}
private Builder destinationRipe(byte[] ripe) {
if (type != Type.MSG && ripe != null) throw new IllegalArgumentException("ripe only allowed for msg");
this.destinationRipe = ripe;
return this;
}
public Builder encoding(Encoding encoding) {
this.encoding = encoding.getCode();
return this;
}
private Builder encoding(long encoding) {
this.encoding = encoding;
return this;
}
public Builder message(ExtendedEncoding message) {
this.encoding = EXTENDED.getCode();
this.message = message.zip();
return this;
}
public Builder message(String subject, String message) {
try {
this.encoding = SIMPLE.getCode();
this.message = ("Subject:" + subject + '\n' + "Body:" + message).getBytes("UTF-8");
} catch (UnsupportedEncodingException e) {
throw new ApplicationException(e);
}
return this;
}
public Builder message(byte[] message) {
this.message = message;
return this;
}
public Builder ackMessage(byte[] ack) {
if (type != Type.MSG && ack != null) throw new IllegalArgumentException("ackMessage only allowed for msg");
this.ackMessage = ack;
return this;
}
public Builder ackData(byte[] ackData) {
if (type != Type.MSG && ackData != null)
throw new IllegalArgumentException("ackMessage only allowed for msg");
this.ackData = ackData;
return this;
}
public Builder signature(byte[] signature) {
this.signature = signature;
return this;
}
public Builder sent(Long sent) {
this.sent = sent;
return this;
}
public Builder received(Long received) {
this.received = received;
return this;
}
public Builder status(Status status) {
this.status = status;
return this;
}
public Builder labels(Collection<Label> labels) {
this.labels.addAll(labels);
return this;
}
public Builder ttl(long ttl) {
this.ttl = ttl;
return this;
}
public Builder retries(int retries) {
this.retries = retries;
return this;
}
public Builder nextTry(Long nextTry) {
this.nextTry = nextTry;
return this;
}
public Builder conversation(UUID id) {
this.conversation = id;
return this;
}
public Plaintext build() {
if (from == null) {
from = new BitmessageAddress(Factory.createPubkey(
addressVersion,
stream,
publicSigningKey,
publicEncryptionKey,
nonceTrialsPerByte,
extraBytes,
behaviorBitfield
));
}
if (to == null && type != Type.BROADCAST && destinationRipe != null) {
to = new BitmessageAddress(0, 0, destinationRipe);
}
if (type == Type.MSG && ackMessage == null && ackData == null) {
ackData = cryptography().randomBytes(Msg.ACK_LENGTH);
}
if (ttl <= 0) {
ttl = TTL.msg();
}
if (conversation == null) {
conversation = UUID.randomUUID();
}
return new Plaintext(this);
}
}
}

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/*
* Copyright 2015 Christian Basler
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package ch.dissem.bitmessage.entity;
import java.io.IOException;
import java.io.OutputStream;
import java.io.Serializable;
import java.nio.ByteBuffer;
/**
* An object that can be written to an {@link OutputStream}
*/
public interface Streamable extends Serializable {
void write(OutputStream stream) throws IOException;
void write(ByteBuffer buffer);
}

246
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/*
* Copyright 2015 Christian Basler
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package ch.dissem.bitmessage.entity;
import ch.dissem.bitmessage.BitmessageContext;
import ch.dissem.bitmessage.entity.valueobject.NetworkAddress;
import ch.dissem.bitmessage.utils.Encode;
import ch.dissem.bitmessage.utils.UnixTime;
import java.io.IOException;
import java.io.OutputStream;
import java.nio.ByteBuffer;
/**
* The 'version' command advertises this node's latest supported protocol version upon initiation.
*/
public class Version implements MessagePayload {
private static final long serialVersionUID = 7219240857343176567L;
/**
* Identifies protocol version being used by the node. Should equal 3. Nodes should disconnect if the remote node's
* version is lower but continue with the connection if it is higher.
*/
private final int version;
/**
* bitfield of features to be enabled for this connection
*/
private final long services;
/**
* standard UNIX timestamp in seconds
*/
private final long timestamp;
/**
* The network address of the node receiving this message (not including the time or stream number)
*/
private final NetworkAddress addrRecv;
/**
* The network address of the node emitting this message (not including the time or stream number and the ip itself
* is ignored by the receiver)
*/
private final NetworkAddress addrFrom;
/**
* Random nonce used to detect connections to self.
*/
private final long nonce;
/**
* User Agent (0x00 if string is 0 bytes long). Sending nodes must not include a user_agent longer than 5000 bytes.
*/
private final String userAgent;
/**
* The stream numbers that the emitting node is interested in. Sending nodes must not include more than 160000
* stream numbers.
*/
private final long[] streams;
private Version(Builder builder) {
version = builder.version;
services = builder.services;
timestamp = builder.timestamp;
addrRecv = builder.addrRecv;
addrFrom = builder.addrFrom;
nonce = builder.nonce;
userAgent = builder.userAgent;
streams = builder.streamNumbers;
}
public int getVersion() {
return version;
}
public long getServices() {
return services;
}
public boolean provides(Service service) {
return service != null && service.isEnabled(services);
}
public long getTimestamp() {
return timestamp;
}
public NetworkAddress getAddrRecv() {
return addrRecv;
}
public NetworkAddress getAddrFrom() {
return addrFrom;
}
public long getNonce() {
return nonce;
}
public String getUserAgent() {
return userAgent;
}
public long[] getStreams() {
return streams;
}
@Override
public Command getCommand() {
return Command.VERSION;
}
@Override
public void write(OutputStream stream) throws IOException {
Encode.int32(version, stream);
Encode.int64(services, stream);
Encode.int64(timestamp, stream);
addrRecv.write(stream, true);
addrFrom.write(stream, true);
Encode.int64(nonce, stream);
Encode.varString(userAgent, stream);
Encode.varIntList(streams, stream);
}
@Override
public void write(ByteBuffer buffer) {
Encode.int32(version, buffer);
Encode.int64(services, buffer);
Encode.int64(timestamp, buffer);
addrRecv.write(buffer, true);
addrFrom.write(buffer, true);
Encode.int64(nonce, buffer);
Encode.varString(userAgent, buffer);
Encode.varIntList(streams, buffer);
}
public static final class Builder {
private int version;
private long services;
private long timestamp;
private NetworkAddress addrRecv;
private NetworkAddress addrFrom;
private long nonce;
private String userAgent;
private long[] streamNumbers;
public Builder defaults(long clientNonce) {
version = BitmessageContext.CURRENT_VERSION;
services = Service.getServiceFlag(Service.NODE_NETWORK);
timestamp = UnixTime.now();
userAgent = "/Jabit:0.0.1/";
streamNumbers = new long[]{1};
nonce = clientNonce;
return this;
}
public Builder version(int version) {
this.version = version;
return this;
}
public Builder services(Service... services) {
this.services = Service.getServiceFlag(services);
return this;
}
public Builder services(long services) {
this.services = services;
return this;
}
public Builder timestamp(long timestamp) {
this.timestamp = timestamp;
return this;
}
public Builder addrRecv(NetworkAddress addrRecv) {
this.addrRecv = addrRecv;
return this;
}
public Builder addrFrom(NetworkAddress addrFrom) {
this.addrFrom = addrFrom;
return this;
}
public Builder nonce(long nonce) {
this.nonce = nonce;
return this;
}
public Builder userAgent(String userAgent) {
this.userAgent = userAgent;
return this;
}
public Builder streams(long... streamNumbers) {
this.streamNumbers = streamNumbers;
return this;
}
public Version build() {
return new Version(this);
}
}
public enum Service {
NODE_NETWORK(1);
// TODO: NODE_SSL(2);
long flag;
Service(long flag) {
this.flag = flag;
}
public boolean isEnabled(long flag) {
return (flag & this.flag) != 0;
}
public static long getServiceFlag(Service... services) {
long flag = 0;
for (Service service : services) {
flag |= service.flag;
}
return flag;
}
}
}

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/*
* Copyright 2015 Christian Basler
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package ch.dissem.bitmessage.entity.payload;
import ch.dissem.bitmessage.entity.BitmessageAddress;
import ch.dissem.bitmessage.entity.Encrypted;
import ch.dissem.bitmessage.entity.Plaintext;
import ch.dissem.bitmessage.entity.PlaintextHolder;
import ch.dissem.bitmessage.exception.DecryptionFailedException;
import java.io.IOException;
import java.util.Objects;
import static ch.dissem.bitmessage.entity.Plaintext.Type.BROADCAST;
import static ch.dissem.bitmessage.utils.Singleton.cryptography;
/**
* Users who are subscribed to the sending address will see the message appear in their inbox.
* Broadcasts are version 4 or 5.
*/
public abstract class Broadcast extends ObjectPayload implements Encrypted, PlaintextHolder {
private static final long serialVersionUID = 4064521827582239069L;
protected final long stream;
protected CryptoBox encrypted;
protected Plaintext plaintext;
protected Broadcast(long version, long stream, CryptoBox encrypted, Plaintext plaintext) {
super(version);
this.stream = stream;
this.encrypted = encrypted;
this.plaintext = plaintext;
}
public static long getVersion(BitmessageAddress address) {
return address.getVersion() < 4 ? 4 : 5;
}
@Override
public boolean isSigned() {
return true;
}
@Override
public byte[] getSignature() {
return plaintext.getSignature();
}
@Override
public void setSignature(byte[] signature) {
plaintext.setSignature(signature);
}
@Override
public long getStream() {
return stream;
}
@Override
public Plaintext getPlaintext() {
return plaintext;
}
@Override
public void encrypt(byte[] publicKey) throws IOException {
this.encrypted = new CryptoBox(plaintext, publicKey);
}
public void encrypt() throws IOException {
encrypt(cryptography().createPublicKey(plaintext.getFrom().getPublicDecryptionKey()));
}
@Override
public void decrypt(byte[] privateKey) throws IOException, DecryptionFailedException {
plaintext = Plaintext.read(BROADCAST, encrypted.decrypt(privateKey));
}
public void decrypt(BitmessageAddress address) throws IOException, DecryptionFailedException {
decrypt(address.getPublicDecryptionKey());
}
@Override
public boolean isDecrypted() {
return plaintext != null;
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
Broadcast broadcast = (Broadcast) o;
return stream == broadcast.stream &&
(Objects.equals(encrypted, broadcast.encrypted) || Objects.equals(plaintext, broadcast.plaintext));
}
@Override
public int hashCode() {
return Objects.hash(stream);
}
}

214
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/*
* Copyright 2015 Christian Basler
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package ch.dissem.bitmessage.entity.payload;
import ch.dissem.bitmessage.entity.Streamable;
import ch.dissem.bitmessage.exception.ApplicationException;
import ch.dissem.bitmessage.exception.DecryptionFailedException;
import ch.dissem.bitmessage.utils.*;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.*;
import java.nio.ByteBuffer;
import java.util.Arrays;
import static ch.dissem.bitmessage.entity.valueobject.PrivateKey.PRIVATE_KEY_SIZE;
import static ch.dissem.bitmessage.utils.Singleton.cryptography;
public class CryptoBox implements Streamable {
private static final long serialVersionUID = 7217659539975573852L;
private static final Logger LOG = LoggerFactory.getLogger(CryptoBox.class);
private final byte[] initializationVector;
private final int curveType;
private final byte[] R;
private final byte[] mac;
private byte[] encrypted;
public CryptoBox(Streamable data, byte[] K) throws IOException {
this(Encode.bytes(data), K);
}
public CryptoBox(byte[] data, byte[] K) throws IOException {
curveType = 0x02CA;
// 1. The destination public key is called K.
// 2. Generate 16 random bytes using a secure random number generator. Call them IV.
initializationVector = cryptography().randomBytes(16);
// 3. Generate a new random EC key pair with private key called r and public key called R.
byte[] r = cryptography().randomBytes(PRIVATE_KEY_SIZE);
R = cryptography().createPublicKey(r);
// 4. Do an EC point multiply with public key K and private key r. This gives you public key P.
byte[] P = cryptography().multiply(K, r);
byte[] X = Points.getX(P);
// 5. Use the X component of public key P and calculate the SHA512 hash H.
byte[] H = cryptography().sha512(X);
// 6. The first 32 bytes of H are called key_e and the last 32 bytes are called key_m.
byte[] key_e = Arrays.copyOfRange(H, 0, 32);
byte[] key_m = Arrays.copyOfRange(H, 32, 64);
// 7. Pad the input text to a multiple of 16 bytes, in accordance to PKCS7.
// 8. Encrypt the data with AES-256-CBC, using IV as initialization vector, key_e as encryption key and the padded input text as payload. Call the output cipher text.
encrypted = cryptography().crypt(true, data, key_e, initializationVector);
// 9. Calculate a 32 byte MAC with HMACSHA256, using key_m as salt and IV + R + cipher text as data. Call the output MAC.
mac = calculateMac(key_m);
// The resulting data is: IV + R + cipher text + MAC
}
private CryptoBox(Builder builder) {
initializationVector = builder.initializationVector;
curveType = builder.curveType;
R = cryptography().createPoint(builder.xComponent, builder.yComponent);
encrypted = builder.encrypted;
mac = builder.mac;
}
public static CryptoBox read(InputStream stream, int length) throws IOException {
AccessCounter counter = new AccessCounter();
return new Builder()
.IV(Decode.bytes(stream, 16, counter))
.curveType(Decode.uint16(stream, counter))
.X(Decode.shortVarBytes(stream, counter))
.Y(Decode.shortVarBytes(stream, counter))
.encrypted(Decode.bytes(stream, length - counter.length() - 32))
.MAC(Decode.bytes(stream, 32))
.build();
}
/**
* @param k a private key, typically should be 32 bytes long
* @return an InputStream yielding the decrypted data
* @throws DecryptionFailedException if the payload can't be decrypted using this private key
* @see <a href='https://bitmessage.org/wiki/Encryption#Decryption'>https://bitmessage.org/wiki/Encryption#Decryption</a>
*/
public InputStream decrypt(byte[] k) throws DecryptionFailedException {
// 1. The private key used to decrypt is called k.
// 2. Do an EC point multiply with private key k and public key R. This gives you public key P.
byte[] P = cryptography().multiply(R, k);
// 3. Use the X component of public key P and calculate the SHA512 hash H.
byte[] H = cryptography().sha512(Arrays.copyOfRange(P, 1, 33));
// 4. The first 32 bytes of H are called key_e and the last 32 bytes are called key_m.
byte[] key_e = Arrays.copyOfRange(H, 0, 32);
byte[] key_m = Arrays.copyOfRange(H, 32, 64);
// 5. Calculate MAC' with HMACSHA256, using key_m as salt and IV + R + cipher text as data.
// 6. Compare MAC with MAC'. If not equal, decryption will fail.
if (!Arrays.equals(mac, calculateMac(key_m))) {
throw new DecryptionFailedException();
}
// 7. Decrypt the cipher text with AES-256-CBC, using IV as initialization vector, key_e as decryption key
// and the cipher text as payload. The output is the padded input text.
return new ByteArrayInputStream(cryptography().crypt(false, encrypted, key_e, initializationVector));
}
private byte[] calculateMac(byte[] key_m) {
try {
ByteArrayOutputStream macData = new ByteArrayOutputStream();
writeWithoutMAC(macData);
return cryptography().mac(key_m, macData.toByteArray());
} catch (IOException e) {
throw new ApplicationException(e);
}
}
private void writeWithoutMAC(OutputStream out) throws IOException {
out.write(initializationVector);
Encode.int16(curveType, out);
writeCoordinateComponent(out, Points.getX(R));
writeCoordinateComponent(out, Points.getY(R));
out.write(encrypted);
}
private void writeCoordinateComponent(OutputStream out, byte[] x) throws IOException {
int offset = Bytes.numberOfLeadingZeros(x);
int length = x.length - offset;
Encode.int16(length, out);
out.write(x, offset, length);
}
private void writeCoordinateComponent(ByteBuffer buffer, byte[] x) {
int offset = Bytes.numberOfLeadingZeros(x);
int length = x.length - offset;
Encode.int16(length, buffer);
buffer.put(x, offset, length);
}
@Override
public void write(OutputStream stream) throws IOException {
writeWithoutMAC(stream);
stream.write(mac);
}
@Override
public void write(ByteBuffer buffer) {
buffer.put(initializationVector);
Encode.int16(curveType, buffer);
writeCoordinateComponent(buffer, Points.getX(R));
writeCoordinateComponent(buffer, Points.getY(R));
buffer.put(encrypted);
buffer.put(mac);
}
public static final class Builder {
private byte[] initializationVector;
private int curveType;
private byte[] xComponent;
private byte[] yComponent;
private byte[] encrypted;
private byte[] mac;
public Builder IV(byte[] initializationVector) {
this.initializationVector = initializationVector;
return this;
}
public Builder curveType(int curveType) {
if (curveType != 0x2CA) LOG.trace("Unexpected curve type " + curveType);
this.curveType = curveType;
return this;
}
public Builder X(byte[] xComponent) {
this.xComponent = xComponent;
return this;
}
public Builder Y(byte[] yComponent) {
this.yComponent = yComponent;
return this;
}
private Builder encrypted(byte[] encrypted) {
this.encrypted = encrypted;
return this;
}
public Builder MAC(byte[] mac) {
this.mac = mac;
return this;
}
public CryptoBox build() {
return new CryptoBox(this);
}
}
}

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/*
* Copyright 2015 Christian Basler
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package ch.dissem.bitmessage.entity.payload;
import ch.dissem.bitmessage.utils.Decode;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.nio.ByteBuffer;
import java.util.Arrays;
/**
* In cases we don't know what to do with an object, we just store its bytes and send it again - we don't really
* have to know what it is.
*/
public class GenericPayload extends ObjectPayload {
private static final long serialVersionUID = -912314085064185940L;
private long stream;
private byte[] data;
public GenericPayload(long version, long stream, byte[] data) {
super(version);
this.stream = stream;
this.data = data;
}
public static GenericPayload read(long version, long stream, InputStream is, int length) throws IOException {
return new GenericPayload(version, stream, Decode.bytes(is, length));
}
@Override
public ObjectType getType() {
return null;
}
@Override
public long getStream() {
return stream;
}
public byte[] getData() {
return data;
}
@Override
public void write(OutputStream stream) throws IOException {
stream.write(data);
}
@Override
public void write(ByteBuffer buffer) {
buffer.put(data);
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
GenericPayload that = (GenericPayload) o;
if (stream != that.stream) return false;
return Arrays.equals(data, that.data);
}
@Override
public int hashCode() {
int result = (int) (stream ^ (stream >>> 32));
result = 31 * result + Arrays.hashCode(data);
return result;
}
}

82
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/*
* Copyright 2015 Christian Basler
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package ch.dissem.bitmessage.entity.payload;
import ch.dissem.bitmessage.entity.BitmessageAddress;
import ch.dissem.bitmessage.utils.Decode;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.nio.ByteBuffer;
/**
* Request for a public key.
*/
public class GetPubkey extends ObjectPayload {
private static final long serialVersionUID = -3634516646972610180L;
private long stream;
private byte[] ripeTag;
public GetPubkey(BitmessageAddress address) {
super(address.getVersion());
this.stream = address.getStream();
if (address.getVersion() < 4)
this.ripeTag = address.getRipe();
else
this.ripeTag = address.getTag();
}
private GetPubkey(long version, long stream, byte[] ripeOrTag) {
super(version);
this.stream = stream;
this.ripeTag = ripeOrTag;
}
public static GetPubkey read(InputStream is, long stream, int length, long version) throws IOException {
return new GetPubkey(version, stream, Decode.bytes(is, length));
}
/**
* @return an array of bytes that represent either the ripe, or the tag of an address, depending on the
* address version.
*/
public byte[] getRipeTag() {
return ripeTag;
}
@Override
public ObjectType getType() {
return ObjectType.GET_PUBKEY;
}
@Override
public long getStream() {
return stream;
}
@Override
public void write(OutputStream stream) throws IOException {
stream.write(ripeTag);
}
@Override
public void write(ByteBuffer buffer) {
buffer.put(ripeTag);
}
}

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/*
* Copyright 2015 Christian Basler
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package ch.dissem.bitmessage.entity.payload;
import ch.dissem.bitmessage.entity.Encrypted;
import ch.dissem.bitmessage.entity.Plaintext;
import ch.dissem.bitmessage.entity.PlaintextHolder;
import ch.dissem.bitmessage.exception.DecryptionFailedException;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.nio.ByteBuffer;
import java.util.Objects;
import static ch.dissem.bitmessage.entity.Plaintext.Type.MSG;
/**
* Used for person-to-person messages.
*/
public class Msg extends ObjectPayload implements Encrypted, PlaintextHolder {
private static final long serialVersionUID = 4327495048296365733L;
public static final int ACK_LENGTH = 32;
private long stream;
private CryptoBox encrypted;
private Plaintext plaintext;
private Msg(long stream, CryptoBox encrypted) {
super(1);
this.stream = stream;
this.encrypted = encrypted;
}
public Msg(Plaintext plaintext) {
super(1);
this.stream = plaintext.getStream();
this.plaintext = plaintext;
}
public static Msg read(InputStream in, long stream, int length) throws IOException {
return new Msg(stream, CryptoBox.read(in, length));
}
@Override
public Plaintext getPlaintext() {
return plaintext;
}
@Override
public ObjectType getType() {
return ObjectType.MSG;
}
@Override
public long getStream() {
return stream;
}
@Override
public boolean isSigned() {
return true;
}
@Override
public void writeBytesToSign(OutputStream out) throws IOException {
plaintext.write(out, false);
}
@Override
public byte[] getSignature() {
return plaintext.getSignature();
}
@Override
public void setSignature(byte[] signature) {
plaintext.setSignature(signature);
}
@Override
public void encrypt(byte[] publicKey) throws IOException {
this.encrypted = new CryptoBox(plaintext, publicKey);
}
@Override
public void decrypt(byte[] privateKey) throws IOException, DecryptionFailedException {
plaintext = Plaintext.read(MSG, encrypted.decrypt(privateKey));
}
@Override
public boolean isDecrypted() {
return plaintext != null;
}
@Override
public void write(OutputStream out) throws IOException {
if (encrypted == null) throw new IllegalStateException("Msg must be signed and encrypted before writing it.");
encrypted.write(out);
}
@Override
public void write(ByteBuffer buffer) {
if (encrypted == null) throw new IllegalStateException("Msg must be signed and encrypted before writing it.");
encrypted.write(buffer);
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
if (!super.equals(o)) return false;
Msg msg = (Msg) o;
return stream == msg.stream &&
(Objects.equals(encrypted, msg.encrypted) || Objects.equals(plaintext, msg.plaintext));
}
@Override
public int hashCode() {
return (int) stream;
}
}

66
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@ -1,66 +0,0 @@
/*
* Copyright 2015 Christian Basler
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package ch.dissem.bitmessage.entity.payload;
import ch.dissem.bitmessage.entity.ObjectMessage;
import ch.dissem.bitmessage.entity.Streamable;
import java.io.IOException;
import java.io.OutputStream;
/**
* The payload of an 'object' command. This is shared by the network.
*/
public abstract class ObjectPayload implements Streamable {
private static final long serialVersionUID = -5034977402902364482L;
private final long version;
protected ObjectPayload(long version) {
this.version = version;
}
public abstract ObjectType getType();
public abstract long getStream();
public long getVersion() {
return version;
}
public boolean isSigned() {
return false;
}
public void writeBytesToSign(OutputStream out) throws IOException {
// nothing to do
}
/**
* @return the ECDSA signature which, as of protocol v3, covers the object header starting with the time,
* appended with the data described in this table down to the extra_bytes. Therefore, this must
* be checked and set in the {@link ObjectMessage} object.
*/
public byte[] getSignature() {
return null;
}
public void setSignature(byte[] signature) {
// nothing to do
}
}

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/*
* Copyright 2015 Christian Basler
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package ch.dissem.bitmessage.entity.payload;
import java.io.IOException;
import java.io.OutputStream;
import java.nio.ByteBuffer;
import java.util.ArrayList;
import static ch.dissem.bitmessage.utils.Singleton.cryptography;
/**
* Public keys for signing and encryption, the answer to a 'getpubkey' request.
*/
public abstract class Pubkey extends ObjectPayload {
private static final long serialVersionUID = -6634533361454999619L;
public final static long LATEST_VERSION = 4;
protected Pubkey(long version) {
super(version);
}
public static byte[] getRipe(byte[] publicSigningKey, byte[] publicEncryptionKey) {
return cryptography().ripemd160(cryptography().sha512(publicSigningKey, publicEncryptionKey));
}
public abstract byte[] getSigningKey();
public abstract byte[] getEncryptionKey();
public abstract int getBehaviorBitfield();
public byte[] getRipe() {
return cryptography().ripemd160(cryptography().sha512(getSigningKey(), getEncryptionKey()));
}
public long getNonceTrialsPerByte() {
return 0;
}
public long getExtraBytes() {
return 0;
}
public void writeUnencrypted(OutputStream out) throws IOException {
write(out);
}
public void writeUnencrypted(ByteBuffer buffer){
write(buffer);
}
protected byte[] add0x04(byte[] key) {
if (key.length == 65) return key;
byte[] result = new byte[65];
result[0] = 4;
System.arraycopy(key, 0, result, 1, 64);
return result;
}
/**
* Bits 0 through 29 are yet undefined
*/
public enum Feature {
/**
* Receiving node expects that the RIPE hash encoded in their address preceedes the encrypted message data of msg
* messages bound for them.
*/
INCLUDE_DESTINATION(30),
/**
* If true, the receiving node does send acknowledgements (rather than dropping them).
*/
DOES_ACK(31);
private int bit;
Feature(int bitNumber) {
// The Bitmessage Protocol Specification starts counting at the most significant bit,
// thus the slightly awkward calculation.
// https://bitmessage.org/wiki/Protocol_specification#Pubkey_bitfield_features
this.bit = 1 << (31 - bitNumber);
}
public static int bitfield(Feature... features) {
int bits = 0;
for (Feature feature : features) {
bits |= feature.bit;
}
return bits;
}
public static Feature[] features(int bitfield) {
ArrayList<Feature> features = new ArrayList<>(Feature.values().length);
for (Feature feature : Feature.values()) {
if ((bitfield & feature.bit) != 0) {
features.add(feature);
}
}
return features.toArray(new Feature[features.size()]);
}
public boolean isActive(int bitfield) {
return (bitfield & bit) != 0;
}
}
}

133
core/src/main/java/ch/dissem/bitmessage/entity/payload/V2Pubkey.java
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@ -1,133 +0,0 @@
/*
* Copyright 2015 Christian Basler
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package ch.dissem.bitmessage.entity.payload;
import ch.dissem.bitmessage.utils.Decode;
import ch.dissem.bitmessage.utils.Encode;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.nio.ByteBuffer;
/**
* A version 2 public key.
*/
public class V2Pubkey extends Pubkey {
private static final long serialVersionUID = -257598690676510460L;
protected long stream;
protected int behaviorBitfield;
protected byte[] publicSigningKey; // 64 Bytes
protected byte[] publicEncryptionKey; // 64 Bytes
protected V2Pubkey(long version) {
super(version);
}
private V2Pubkey(long version, Builder builder) {
super(version);
stream = builder.streamNumber;
behaviorBitfield = builder.behaviorBitfield;
publicSigningKey = add0x04(builder.publicSigningKey);
publicEncryptionKey = add0x04(builder.publicEncryptionKey);
}
public static V2Pubkey read(InputStream is, long stream) throws IOException {
return new V2Pubkey.Builder()
.stream(stream)
.behaviorBitfield((int) Decode.uint32(is))
.publicSigningKey(Decode.bytes(is, 64))
.publicEncryptionKey(Decode.bytes(is, 64))
.build();
}
@Override
public long getVersion() {
return 2;
}
@Override
public ObjectType getType() {
return ObjectType.PUBKEY;
}
@Override
public long getStream() {
return stream;
}
@Override
public byte[] getSigningKey() {
return publicSigningKey;
}
@Override
public byte[] getEncryptionKey() {
return publicEncryptionKey;
}
@Override
public int getBehaviorBitfield() {
return behaviorBitfield;
}
@Override
public void write(OutputStream out) throws IOException {
Encode.int32(behaviorBitfield, out);
out.write(publicSigningKey, 1, 64);
out.write(publicEncryptionKey, 1, 64);
}
@Override
public void write(ByteBuffer buffer) {
Encode.int32(behaviorBitfield, buffer);
buffer.put(publicSigningKey, 1, 64);
buffer.put(publicEncryptionKey, 1, 64);
}
public static class Builder {
private long streamNumber;
private int behaviorBitfield;
private byte[] publicSigningKey;
private byte[] publicEncryptionKey;
public Builder stream(long streamNumber) {
this.streamNumber = streamNumber;
return this;
}
public Builder behaviorBitfield(int behaviorBitfield) {
this.behaviorBitfield = behaviorBitfield;
return this;
}
public Builder publicSigningKey(byte[] publicSigningKey) {
this.publicSigningKey = publicSigningKey;
return this;
}
public Builder publicEncryptionKey(byte[] publicEncryptionKey) {
this.publicEncryptionKey = publicEncryptionKey;
return this;
}
public V2Pubkey build() {
return new V2Pubkey(2, this);
}
}
}

175
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/*
* Copyright 2015 Christian Basler
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package ch.dissem.bitmessage.entity.payload;
import ch.dissem.bitmessage.utils.Decode;
import ch.dissem.bitmessage.utils.Encode;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.nio.ByteBuffer;
import java.util.Arrays;
import java.util.Objects;
/**
* A version 3 public key.
*/
public class V3Pubkey extends V2Pubkey {
private static final long serialVersionUID = 6958853116648528319L;
long nonceTrialsPerByte;
long extraBytes;
byte[] signature;
protected V3Pubkey(long version, Builder builder) {
super(version);
stream = builder.streamNumber;
behaviorBitfield = builder.behaviorBitfield;
publicSigningKey = add0x04(builder.publicSigningKey);
publicEncryptionKey = add0x04(builder.publicEncryptionKey);
nonceTrialsPerByte = builder.nonceTrialsPerByte;
extraBytes = builder.extraBytes;
signature = builder.signature;
}
public static V3Pubkey read(InputStream is, long stream) throws IOException {
return new V3Pubkey.Builder()
.stream(stream)
.behaviorBitfield(Decode.int32(is))
.publicSigningKey(Decode.bytes(is, 64))
.publicEncryptionKey(Decode.bytes(is, 64))
.nonceTrialsPerByte(Decode.varInt(is))
.extraBytes(Decode.varInt(is))
.signature(Decode.varBytes(is))
.build();
}
@Override
public void write(OutputStream out) throws IOException {
writeBytesToSign(out);
Encode.varBytes(signature, out);
}
@Override
public void write(ByteBuffer buffer) {
super.write(buffer);
Encode.varInt(nonceTrialsPerByte, buffer);
Encode.varInt(extraBytes, buffer);
Encode.varBytes(signature, buffer);
}
@Override
public long getVersion() {
return 3;
}
public long getNonceTrialsPerByte() {
return nonceTrialsPerByte;
}
public long getExtraBytes() {
return extraBytes;
}
public boolean isSigned() {
return true;
}
public void writeBytesToSign(OutputStream out) throws IOException {
super.write(out);
Encode.varInt(nonceTrialsPerByte, out);
Encode.varInt(extraBytes, out);
}
@Override
public byte[] getSignature() {
return signature;
}
@Override
public void setSignature(byte[] signature) {
this.signature = signature;
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
V3Pubkey pubkey = (V3Pubkey) o;
return Objects.equals(nonceTrialsPerByte, pubkey.nonceTrialsPerByte) &&
Objects.equals(extraBytes, pubkey.extraBytes) &&
stream == pubkey.stream &&
behaviorBitfield == pubkey.behaviorBitfield &&
Arrays.equals(publicSigningKey, pubkey.publicSigningKey) &&
Arrays.equals(publicEncryptionKey, pubkey.publicEncryptionKey);
}
@Override
public int hashCode() {
return Objects.hash(nonceTrialsPerByte, extraBytes);
}
public static class Builder {
private long streamNumber;
private int behaviorBitfield;
private byte[] publicSigningKey;
private byte[] publicEncryptionKey;
private long nonceTrialsPerByte;
private long extraBytes;
private byte[] signature = new byte[0];
public Builder stream(long streamNumber) {
this.streamNumber = streamNumber;
return this;
}
public Builder behaviorBitfield(int behaviorBitfield) {
this.behaviorBitfield = behaviorBitfield;
return this;
}
public Builder publicSigningKey(byte[] publicSigningKey) {
this.publicSigningKey = publicSigningKey;
return this;
}
public Builder publicEncryptionKey(byte[] publicEncryptionKey) {
this.publicEncryptionKey = publicEncryptionKey;
return this;
}
public Builder nonceTrialsPerByte(long nonceTrialsPerByte) {
this.nonceTrialsPerByte = nonceTrialsPerByte;
return this;
}
public Builder extraBytes(long extraBytes) {
this.extraBytes = extraBytes;
return this;
}
public Builder signature(byte[] signature) {
this.signature = signature;
return this;
}
public V3Pubkey build() {
return new V3Pubkey(3, this);
}
}
}

67
core/src/main/java/ch/dissem/bitmessage/entity/payload/V4Broadcast.java
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@ -1,67 +0,0 @@
/*
* Copyright 2015 Christian Basler
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package ch.dissem.bitmessage.entity.payload;
import ch.dissem.bitmessage.entity.BitmessageAddress;
import ch.dissem.bitmessage.entity.Plaintext;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.nio.ByteBuffer;
/**
* Users who are subscribed to the sending address will see the message appear in their inbox.
* Broadcasts are version 4 or 5.
*/
public class V4Broadcast extends Broadcast {
private static final long serialVersionUID = 195663108282762711L;
protected V4Broadcast(long version, long stream, CryptoBox encrypted, Plaintext plaintext) {
super(version, stream, encrypted, plaintext);
}
public V4Broadcast(BitmessageAddress senderAddress, Plaintext plaintext) {
super(4, senderAddress.getStream(), null, plaintext);
if (senderAddress.getVersion() >= 4)
throw new IllegalArgumentException("Address version 3 or older expected, but was " + senderAddress.getVersion());
}
public static V4Broadcast read(InputStream in, long stream, int length) throws IOException {
return new V4Broadcast(4, stream, CryptoBox.read(in, length), null);
}
@Override
public ObjectType getType() {
return ObjectType.BROADCAST;
}
@Override
public void writeBytesToSign(OutputStream out) throws IOException {
plaintext.write(out, false);
}
@Override
public void write(OutputStream out) throws IOException {
encrypted.write(out);
}
@Override
public void write(ByteBuffer buffer) {
encrypted.write(buffer);
}
}

191
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@ -1,191 +0,0 @@
/*
* Copyright 2015 Christian Basler
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package ch.dissem.bitmessage.entity.payload;
import ch.dissem.bitmessage.entity.BitmessageAddress;
import ch.dissem.bitmessage.entity.Encrypted;
import ch.dissem.bitmessage.exception.DecryptionFailedException;
import ch.dissem.bitmessage.utils.Decode;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.nio.ByteBuffer;
import java.util.Arrays;
/**
* A version 4 public key. When version 4 pubkeys are created, most of the data in the pubkey is encrypted. This is
* done in such a way that only someone who has the Bitmessage address which corresponds to a pubkey can decrypt and
* use that pubkey. This prevents people from gathering pubkeys sent around the network and using the data from them
* to create messages to be used in spam or in flooding attacks.
*/
public class V4Pubkey extends Pubkey implements Encrypted {
private static final long serialVersionUID = 1556710353694033093L;
private long stream;
private byte[] tag;
private CryptoBox encrypted;
private V3Pubkey decrypted;
private V4Pubkey(long stream, byte[] tag, CryptoBox encrypted) {
super(4);
this.stream = stream;
this.tag = tag;
this.encrypted = encrypted;
}
public V4Pubkey(V3Pubkey decrypted) {
super(4);
this.decrypted = decrypted;
this.stream = decrypted.stream;
this.tag = BitmessageAddress.calculateTag(4, decrypted.getStream(), decrypted.getRipe());
}
public static V4Pubkey read(InputStream in, long stream, int length, boolean encrypted) throws IOException {
if (encrypted)
return new V4Pubkey(stream,
Decode.bytes(in, 32),
CryptoBox.read(in, length - 32));
else
return new V4Pubkey(V3Pubkey.read(in, stream));
}
@Override
public void encrypt(byte[] publicKey) throws IOException {
if (getSignature() == null) throw new IllegalStateException("Pubkey must be signed before encryption.");
this.encrypted = new CryptoBox(decrypted, publicKey);
}
@Override
public void decrypt(byte[] privateKey) throws IOException, DecryptionFailedException {
decrypted = V3Pubkey.read(encrypted.decrypt(privateKey), stream);
}
@Override
public boolean isDecrypted() {
return decrypted != null;
}
@Override
public void write(OutputStream stream) throws IOException {
stream.write(tag);
encrypted.write(stream);
}
@Override
public void write(ByteBuffer buffer) {
buffer.put(tag);
encrypted.write(buffer);
}
@Override
public void writeUnencrypted(OutputStream out) throws IOException {
decrypted.write(out);
}
@Override
public void writeUnencrypted(ByteBuffer buffer) {
decrypted.write(buffer);
}
@Override
public void writeBytesToSign(OutputStream out) throws IOException {
out.write(tag);
decrypted.writeBytesToSign(out);
}
@Override
public long getVersion() {
return 4;
}
@Override
public ObjectType getType() {
return ObjectType.PUBKEY;
}
@Override
public long getStream() {
return stream;
}
public byte[] getTag() {
return tag;
}
@Override
public byte[] getSigningKey() {
return decrypted.getSigningKey();
}
@Override
public byte[] getEncryptionKey() {
return decrypted.getEncryptionKey();
}
@Override
public int getBehaviorBitfield() {
return decrypted.getBehaviorBitfield();
}
@Override
public byte[] getSignature() {
if (decrypted != null)
return decrypted.getSignature();
else
return null;
}
@Override
public void setSignature(byte[] signature) {
decrypted.setSignature(signature);
}
@Override
public boolean isSigned() {
return true;
}
public long getNonceTrialsPerByte() {
return decrypted.getNonceTrialsPerByte();
}
public long getExtraBytes() {
return decrypted.getExtraBytes();
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
V4Pubkey v4Pubkey = (V4Pubkey) o;
if (stream != v4Pubkey.stream) return false;
if (!Arrays.equals(tag, v4Pubkey.tag)) return false;
return !(decrypted != null ? !decrypted.equals(v4Pubkey.decrypted) : v4Pubkey.decrypted != null);
}
@Override
public int hashCode() {
int result = (int) (stream ^ (stream >>> 32));
result = 31 * result + Arrays.hashCode(tag);
result = 31 * result + (decrypted != null ? decrypted.hashCode() : 0);
return result;
}
}

66
core/src/main/java/ch/dissem/bitmessage/entity/payload/V5Broadcast.java
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@ -1,66 +0,0 @@
/*
* Copyright 2015 Christian Basler
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package ch.dissem.bitmessage.entity.payload;
import ch.dissem.bitmessage.entity.BitmessageAddress;
import ch.dissem.bitmessage.entity.Plaintext;
import ch.dissem.bitmessage.utils.Decode;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
/**
* Users who are subscribed to the sending address will see the message appear in their inbox.
*/
public class V5Broadcast extends V4Broadcast {
private static final long serialVersionUID = 920649721626968644L;
private byte[] tag;
private V5Broadcast(long stream, byte[] tag, CryptoBox encrypted) {
super(5, stream, encrypted, null);
this.tag = tag;
}
public V5Broadcast(BitmessageAddress senderAddress, Plaintext plaintext) {
super(5, senderAddress.getStream(), null, plaintext);
if (senderAddress.getVersion() < 4)
throw new IllegalArgumentException("Address version 4 (or newer) expected, but was " + senderAddress.getVersion());
this.tag = senderAddress.getTag();
}
public static V5Broadcast read(InputStream is, long stream, int length) throws IOException {
return new V5Broadcast(stream, Decode.bytes(is, 32), CryptoBox.read(is, length - 32));
}
public byte[] getTag() {
return tag;
}
@Override
public void writeBytesToSign(OutputStream out) throws IOException {
out.write(tag);
super.writeBytesToSign(out);
}
@Override
public void write(OutputStream out) throws IOException {
out.write(tag);
super.write(out);
}
}

76
core/src/main/java/ch/dissem/bitmessage/entity/valueobject/ExtendedEncoding.java
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@ -1,76 +0,0 @@
package ch.dissem.bitmessage.entity.valueobject;
import ch.dissem.bitmessage.exception.ApplicationException;
import ch.dissem.msgpack.types.MPMap;
import ch.dissem.msgpack.types.MPString;
import ch.dissem.msgpack.types.MPType;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.Serializable;
import java.util.Objects;
import java.util.zip.DeflaterOutputStream;
/**
* Extended encoding message object.
*/
public class ExtendedEncoding implements Serializable {
private static final long serialVersionUID = 3876871488247305200L;
private static final Logger LOG = LoggerFactory.getLogger(ExtendedEncoding.class);
private ExtendedType content;
public ExtendedEncoding(ExtendedType content) {
this.content = content;
}
public String getType() {
if (content == null) {
return null;
} else {
return content.getType();
}
}
public ExtendedType getContent() {
return content;
}
public byte[] zip() {
try (ByteArrayOutputStream out = new ByteArrayOutputStream()) {
try (DeflaterOutputStream zipper = new DeflaterOutputStream(out)) {
content.pack().pack(zipper);
}
return out.toByteArray();
} catch (IOException e) {
throw new ApplicationException(e);
}
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
ExtendedEncoding that = (ExtendedEncoding) o;
return Objects.equals(content, that.content);
}
@Override
public int hashCode() {
return Objects.hash(content);
}
public interface Unpacker<T extends ExtendedType> {
String getType();
T unpack(MPMap<MPString, MPType<?>> map);
}
public interface ExtendedType extends Serializable {
String getType();
MPMap<MPString, MPType<?>> pack() throws IOException;
}
}

82
core/src/main/java/ch/dissem/bitmessage/entity/valueobject/InventoryVector.java
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@ -1,82 +0,0 @@
/*
* Copyright 2015 Christian Basler
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package ch.dissem.bitmessage.entity.valueobject;
import ch.dissem.bitmessage.entity.Streamable;
import ch.dissem.bitmessage.utils.Strings;
import java.io.IOException;
import java.io.OutputStream;
import java.io.Serializable;
import java.nio.ByteBuffer;
import java.util.Arrays;
public class InventoryVector implements Streamable, Serializable {
private static final long serialVersionUID = -7349009673063348719L;
/**
* Hash of the object
*/
private final byte[] hash;
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (!(o instanceof InventoryVector)) return false;
InventoryVector that = (InventoryVector) o;
return Arrays.equals(hash, that.hash);
}
@Override
public int hashCode() {
return hash == null ? 0 : Arrays.hashCode(hash);
}
public byte[] getHash() {
return hash;
}
private InventoryVector(byte[] hash) {
if (hash == null) throw new IllegalArgumentException("hash must not be null");
this.hash = hash;
}
public static InventoryVector fromHash(byte[] hash) {
if (hash == null) {
return null;
} else {
return new InventoryVector(hash);
}
}
@Override
public void write(OutputStream out) throws IOException {
out.write(hash);
}
@Override
public void write(ByteBuffer buffer) {
buffer.put(hash);
}
@Override
public String toString() {
return Strings.hex(hash).toString();
}
}

89
core/src/main/java/ch/dissem/bitmessage/entity/valueobject/Label.java
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@ -1,89 +0,0 @@
/*
* Copyright 2015 Christian Basler
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package ch.dissem.bitmessage.entity.valueobject;
import java.io.Serializable;
import java.util.Objects;
public class Label implements Serializable {
private static final long serialVersionUID = 831782893630994914L;
private Object id;
private String label;
private Type type;
private int color;
public Label(String label, Type type, int color) {
this.label = label;
this.type = type;
this.color = color;
}
/**
* @return RGBA representation for the color.
*/
public int getColor() {
return color;
}
/**
* @param color RGBA representation for the color.
*/
public void setColor(int color) {
this.color = color;
}
@Override
public String toString() {
return label;
}
public Object getId() {
return id;
}
public void setId(Object id) {
this.id = id;
}
public Type getType() {
return type;
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
Label label1 = (Label) o;
return Objects.equals(label, label1.label);
}
@Override
public int hashCode() {
return Objects.hash(label);
}
public enum Type {
INBOX,
BROADCAST,
DRAFT,
OUTBOX,
SENT,
UNREAD,
TRASH
}
}

246
core/src/main/java/ch/dissem/bitmessage/entity/valueobject/NetworkAddress.java
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@ -1,246 +0,0 @@
/*
* Copyright 2015 Christian Basler
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package ch.dissem.bitmessage.entity.valueobject;
import ch.dissem.bitmessage.entity.Streamable;
import ch.dissem.bitmessage.entity.Version;
import ch.dissem.bitmessage.exception.ApplicationException;
import ch.dissem.bitmessage.utils.Encode;
import ch.dissem.bitmessage.utils.UnixTime;
import java.io.IOException;
import java.io.OutputStream;
import java.net.InetAddress;
import java.net.InetSocketAddress;
import java.net.SocketAddress;
import java.net.UnknownHostException;
import java.nio.ByteBuffer;
import java.util.Arrays;
/**
* A node's address. It's written in IPv6 format.
*/
public class NetworkAddress implements Streamable {
private static final long serialVersionUID = 2500120578167100300L;
private long time;
/**
* Stream number for this node
*/
private final long stream;
/**
* same service(s) listed in version
*/
private final long services;
/**
* IPv6 address. IPv4 addresses are written into the message as a 16 byte IPv4-mapped IPv6 address
* (12 bytes 00 00 00 00 00 00 00 00 00 00 FF FF, followed by the 4 bytes of the IPv4 address).
*/
private final byte[] ipv6;
private final int port;
private NetworkAddress(Builder builder) {
time = builder.time;
stream = builder.stream;
services = builder.services;
ipv6 = builder.ipv6;
port = builder.port;
}
public byte[] getIPv6() {
return ipv6;
}
public int getPort() {
return port;
}
public long getServices() {
return services;
}
public boolean provides(Version.Service service) {
if (service == null) {
return false;
}
return service.isEnabled(services);
}
public long getStream() {
return stream;
}
public long getTime() {
return time;
}
public void setTime(long time) {
this.time = time;
}
public InetAddress toInetAddress() {
try {
return InetAddress.getByAddress(ipv6);
} catch (UnknownHostException e) {
throw new ApplicationException(e);
}
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
NetworkAddress that = (NetworkAddress) o;
return port == that.port && Arrays.equals(ipv6, that.ipv6);
}
@Override
public int hashCode() {
int result = ipv6 != null ? Arrays.hashCode(ipv6) : 0;
result = 31 * result + port;
return result;
}
@Override
public String toString() {
return "[" + toInetAddress() + "]:" + port;
}
@Override
public void write(OutputStream stream) throws IOException {
write(stream, false);
}
public void write(OutputStream out, boolean light) throws IOException {
if (!light) {
Encode.int64(time, out);
Encode.int32(stream, out);
}
Encode.int64(services, out);
out.write(ipv6);
Encode.int16(port, out);
}
@Override
public void write(ByteBuffer buffer) {
write(buffer, false);
}
public void write(ByteBuffer buffer, boolean light) {
if (!light) {
Encode.int64(time, buffer);
Encode.int32(stream, buffer);
}
Encode.int64(services, buffer);
buffer.put(ipv6);
Encode.int16(port, buffer);
}
public static final class Builder {
private long time;
private long stream;
private long services = 1;
private byte[] ipv6;
private int port;
public Builder time(final long time) {
this.time = time;
return this;
}
public Builder stream(final long stream) {
this.stream = stream;
return this;
}
public Builder services(final long services) {
this.services = services;
return this;
}
public Builder ip(InetAddress inetAddress) {
byte[] addr = inetAddress.getAddress();
if (addr.length == 16) {
this.ipv6 = addr;
} else if (addr.length == 4) {
this.ipv6 = new byte[16];
this.ipv6[10] = (byte) 0xff;
this.ipv6[11] = (byte) 0xff;
System.arraycopy(addr, 0, this.ipv6, 12, 4);
} else {
throw new IllegalArgumentException("Weird address " + inetAddress);
}
return this;
}
public Builder ipv6(byte[] ipv6) {
this.ipv6 = ipv6;
return this;
}
public Builder ipv6(int p00, int p01, int p02, int p03,
int p04, int p05, int p06, int p07,
int p08, int p09, int p10, int p11,
int p12, int p13, int p14, int p15) {
this.ipv6 = new byte[]{
(byte) p00, (byte) p01, (byte) p02, (byte) p03,
(byte) p04, (byte) p05, (byte) p06, (byte) p07,
(byte) p08, (byte) p09, (byte) p10, (byte) p11,
(byte) p12, (byte) p13, (byte) p14, (byte) p15
};
return this;
}
public Builder ipv4(int p00, int p01, int p02, int p03) {
this.ipv6 = new byte[]{
(byte) 0, (byte) 0, (byte) 0x00, (byte) 0x00,
(byte) 0, (byte) 0, (byte) 0x00, (byte) 0x00,
(byte) 0, (byte) 0, (byte) 0xff, (byte) 0xff,
(byte) p00, (byte) p01, (byte) p02, (byte) p03
};
return this;
}
public Builder port(final int port) {
this.port = port;
return this;
}
public Builder address(SocketAddress address) {
if (address instanceof InetSocketAddress) {
InetSocketAddress inetAddress = (InetSocketAddress) address;
ip(inetAddress.getAddress());
port(inetAddress.getPort());
} else {
throw new IllegalArgumentException("Unknown type of address: " + address.getClass());
}
return this;
}
public NetworkAddress build() {
if (time == 0) {
time = UnixTime.now();
}
return new NetworkAddress(this);
}
}
}

198
core/src/main/java/ch/dissem/bitmessage/entity/valueobject/PrivateKey.java
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@ -1,198 +0,0 @@
/*
* Copyright 2015 Christian Basler
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package ch.dissem.bitmessage.entity.valueobject;
import ch.dissem.bitmessage.InternalContext;
import ch.dissem.bitmessage.entity.BitmessageAddress;
import ch.dissem.bitmessage.entity.Streamable;
import ch.dissem.bitmessage.entity.payload.Pubkey;
import ch.dissem.bitmessage.exception.ApplicationException;
import ch.dissem.bitmessage.factory.Factory;
import ch.dissem.bitmessage.utils.Bytes;
import ch.dissem.bitmessage.utils.Decode;
import ch.dissem.bitmessage.utils.Encode;
import java.io.*;
import java.nio.ByteBuffer;
import java.util.ArrayList;
import java.util.List;
import static ch.dissem.bitmessage.utils.Singleton.cryptography;
/**
* Represents a private key. Additional information (stream, version, features, ...) is stored in the accompanying
* {@link Pubkey} object.
*/
public class PrivateKey implements Streamable {
private static final long serialVersionUID = 8562555470709110558L;
public static final int PRIVATE_KEY_SIZE = 32;
private final byte[] privateSigningKey;
private final byte[] privateEncryptionKey;
private final Pubkey pubkey;
public PrivateKey(boolean shorter, long stream, long nonceTrialsPerByte, long extraBytes, Pubkey.Feature... features) {
byte[] privSK;
byte[] pubSK;
byte[] privEK;
byte[] pubEK;
byte[] ripe;
do {
privSK = cryptography().randomBytes(PRIVATE_KEY_SIZE);
privEK = cryptography().randomBytes(PRIVATE_KEY_SIZE);
pubSK = cryptography().createPublicKey(privSK);
pubEK = cryptography().createPublicKey(privEK);
ripe = Pubkey.getRipe(pubSK, pubEK);
} while (ripe[0] != 0 || (shorter && ripe[1] != 0));
this.privateSigningKey = privSK;
this.privateEncryptionKey = privEK;
this.pubkey = cryptography().createPubkey(Pubkey.LATEST_VERSION, stream, privateSigningKey, privateEncryptionKey,
nonceTrialsPerByte, extraBytes, features);
}
public PrivateKey(byte[] privateSigningKey, byte[] privateEncryptionKey, Pubkey pubkey) {
this.privateSigningKey = privateSigningKey;
this.privateEncryptionKey = privateEncryptionKey;
this.pubkey = pubkey;
}
public PrivateKey(BitmessageAddress address, String passphrase) {
this(address.getVersion(), address.getStream(), passphrase);
}
public PrivateKey(long version, long stream, String passphrase) {
this(new Builder(version, stream, false).seed(passphrase).generate());
}
private PrivateKey(Builder builder) {
this.privateSigningKey = builder.privSK;
this.privateEncryptionKey = builder.privEK;
this.pubkey = Factory.createPubkey(builder.version, builder.stream, builder.pubSK, builder.pubEK,
InternalContext.NETWORK_NONCE_TRIALS_PER_BYTE, InternalContext.NETWORK_EXTRA_BYTES);
}
private static class Builder {
final long version;
final long stream;
final boolean shorter;
byte[] seed;
long nextNonce;
byte[] privSK, privEK;
byte[] pubSK, pubEK;
private Builder(long version, long stream, boolean shorter) {
this.version = version;
this.stream = stream;
this.shorter = shorter;
}
Builder seed(String passphrase) {
try {
seed = passphrase.getBytes("UTF-8");
} catch (UnsupportedEncodingException e) {
throw new ApplicationException(e);
}
return this;
}
Builder generate() {
long signingKeyNonce = nextNonce;
long encryptionKeyNonce = nextNonce + 1;
byte[] ripe;
do {
privEK = Bytes.truncate(cryptography().sha512(seed, Encode.varInt(encryptionKeyNonce)), 32);
privSK = Bytes.truncate(cryptography().sha512(seed, Encode.varInt(signingKeyNonce)), 32);
pubSK = cryptography().createPublicKey(privSK);
pubEK = cryptography().createPublicKey(privEK);
ripe = cryptography().ripemd160(cryptography().sha512(pubSK, pubEK));
signingKeyNonce += 2;
encryptionKeyNonce += 2;
} while (ripe[0] != 0 || (shorter && ripe[1] != 0));
nextNonce = signingKeyNonce;
return this;
}
}
public static List<PrivateKey> deterministic(String passphrase, int numberOfAddresses, long version, long stream, boolean shorter) {
List<PrivateKey> result = new ArrayList<>(numberOfAddresses);
Builder builder = new Builder(version, stream, shorter).seed(passphrase);
for (int i = 0; i < numberOfAddresses; i++) {
builder.generate();
result.add(new PrivateKey(builder));
}
return result;
}
public static PrivateKey read(InputStream is) throws IOException {
int version = (int) Decode.varInt(is);
long stream = Decode.varInt(is);
int len = (int) Decode.varInt(is);
Pubkey pubkey = Factory.readPubkey(version, stream, is, len, false);
len = (int) Decode.varInt(is);
byte[] signingKey = Decode.bytes(is, len);
len = (int) Decode.varInt(is);
byte[] encryptionKey = Decode.bytes(is, len);
return new PrivateKey(signingKey, encryptionKey, pubkey);
}
public byte[] getPrivateSigningKey() {
return privateSigningKey;
}
public byte[] getPrivateEncryptionKey() {
return privateEncryptionKey;
}
public Pubkey getPubkey() {
return pubkey;
}
@Override
public void write(OutputStream out) throws IOException {
Encode.varInt(pubkey.getVersion(), out);
Encode.varInt(pubkey.getStream(), out);
ByteArrayOutputStream baos = new ByteArrayOutputStream();
pubkey.writeUnencrypted(baos);
Encode.varInt(baos.size(), out);
out.write(baos.toByteArray());
Encode.varInt(privateSigningKey.length, out);
out.write(privateSigningKey);
Encode.varInt(privateEncryptionKey.length, out);
out.write(privateEncryptionKey);
}
@Override
public void write(ByteBuffer buffer) {
Encode.varInt(pubkey.getVersion(), buffer);
Encode.varInt(pubkey.getStream(), buffer);
try {
ByteArrayOutputStream baos = new ByteArrayOutputStream();
pubkey.writeUnencrypted(baos);
Encode.varBytes(baos.toByteArray(), buffer);
} catch (IOException e) {
throw new ApplicationException(e);
}
Encode.varBytes(privateSigningKey, buffer);
Encode.varBytes(privateEncryptionKey, buffer);
}
}

100
core/src/main/java/ch/dissem/bitmessage/entity/valueobject/extended/Attachment.java
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@ -1,100 +0,0 @@
package ch.dissem.bitmessage.entity.valueobject.extended;
import java.io.Serializable;
import java.util.Arrays;
import java.util.Objects;
/**
* A "file" attachment as used by extended encoding type messages. Could either be an attachment,
* or used inline to be used by a HTML message, for example.
*/
public class Attachment implements Serializable {
private static final long serialVersionUID = 7319139427666943189L;
private String name;
private byte[] data;
private String type;
private Disposition disposition;
public String getName() {
return name;
}
public byte[] getData() {
return data;
}
public String getType() {
return type;
}
public Disposition getDisposition() {
return disposition;
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
Attachment that = (Attachment) o;
return Objects.equals(name, that.name) &&
Arrays.equals(data, that.data) &&
Objects.equals(type, that.type) &&
disposition == that.disposition;
}
@Override
public int hashCode() {
return Objects.hash(name, data, type, disposition);
}
public enum Disposition {
inline, attachment
}
public static final class Builder {
private String name;
private byte[] data;
private String type;
private Disposition disposition;
public Builder name(String name) {
this.name = name;
return this;
}
public Builder data(byte[] data) {
this.data = data;
return this;
}
public Builder type(String type) {
this.type = type;
return this;
}
public Builder inline() {
this.disposition = Disposition.inline;
return this;
}
public Builder attachment() {
this.disposition = Disposition.attachment;
return this;
}
public Builder disposition(Disposition disposition) {
this.disposition = disposition;
return this;
}
public Attachment build() {
Attachment attachment = new Attachment();
attachment.type = this.type;
attachment.disposition = this.disposition;
attachment.data = this.data;
attachment.name = this.name;
return attachment;
}
}
}

219
core/src/main/java/ch/dissem/bitmessage/entity/valueobject/extended/Message.java
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@ -1,219 +0,0 @@
package ch.dissem.bitmessage.entity.valueobject.extended;
import ch.dissem.bitmessage.entity.Plaintext;
import ch.dissem.bitmessage.entity.valueobject.ExtendedEncoding;
import ch.dissem.bitmessage.entity.valueobject.InventoryVector;
import ch.dissem.msgpack.types.*;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.net.URLConnection;
import java.nio.file.Files;
import java.util.*;
import static ch.dissem.bitmessage.entity.valueobject.extended.Attachment.Disposition.attachment;
import static ch.dissem.bitmessage.utils.Strings.str;
import static ch.dissem.msgpack.types.Utils.mp;
/**
* Extended encoding type 'message'. Properties 'parents' and 'files' not yet supported by PyBitmessage, so they might not work
* properly with future PyBitmessage implementations.
*/
public class Message implements ExtendedEncoding.ExtendedType {
private static final long serialVersionUID = -2724977231484285467L;
private static final Logger LOG = LoggerFactory.getLogger(Message.class);
public static final String TYPE = "message";
private String subject;
private String body;
private List<InventoryVector> parents;
private List<Attachment> files;
private Message(Builder builder) {
subject = builder.subject;
body = builder.body;
parents = Collections.unmodifiableList(builder.parents);
files = Collections.unmodifiableList(builder.files);
}
@Override
public String getType() {
return TYPE;
}
public String getSubject() {
return subject;
}
public String getBody() {
return body;
}
public List<InventoryVector> getParents() {
return parents;
}
public List<Attachment> getFiles() {
return files;
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
Message message = (Message) o;
return Objects.equals(subject, message.subject) &&
Objects.equals(body, message.body) &&
Objects.equals(parents, message.parents) &&
Objects.equals(files, message.files);
}
@Override
public int hashCode() {
return Objects.hash(subject, body, parents, files);
}
@Override
public MPMap<MPString, MPType<?>> pack() throws IOException {
MPMap<MPString, MPType<?>> result = new MPMap<>();
result.put(mp(""), mp(TYPE));
result.put(mp("subject"), mp(subject));
result.put(mp("body"), mp(body));
if (!files.isEmpty()) {
MPArray<MPMap<MPString, MPType<?>>> items = new MPArray<>();
result.put(mp("files"), items);
for (Attachment file : files) {
MPMap<MPString, MPType<?>> item = new MPMap<>();
item.put(mp("name"), mp(file.getName()));
item.put(mp("data"), mp(file.getData()));
item.put(mp("type"), mp(file.getType()));
item.put(mp("disposition"), mp(file.getDisposition().name()));
items.add(item);
}
}
if (!parents.isEmpty()) {
MPArray<MPBinary> items = new MPArray<>();
result.put(mp("parents"), items);
for (InventoryVector parent : parents) {
items.add(mp(parent.getHash()));
}
}
return result;
}
public static class Builder {
private String subject;
private String body;
private List<InventoryVector> parents = new LinkedList<>();
private List<Attachment> files = new LinkedList<>();
public Builder subject(String subject) {
this.subject = subject;
return this;
}
public Builder body(String body) {
this.body = body;
return this;
}
public Builder addParent(Plaintext parent) {
if (parent != null) {
InventoryVector iv = parent.getInventoryVector();
if (iv == null) {
LOG.debug("Ignored parent without IV");
} else {
parents.add(iv);
}
}
return this;
}
public Builder addParent(InventoryVector iv) {
if (iv != null) {
parents.add(iv);
}
return this;
}
public Builder addFile(File file, Attachment.Disposition disposition) {
if (file != null) {
try {
files.add(new Attachment.Builder()
.name(file.getName())
.disposition(disposition)
.type(URLConnection.guessContentTypeFromStream(new FileInputStream(file)))
.data(Files.readAllBytes(file.toPath()))
.build());
} catch (IOException e) {
LOG.error(e.getMessage(), e);
}
}
return this;
}
public Builder addFile(Attachment file) {
if (file != null) {
files.add(file);
}
return this;
}
public ExtendedEncoding build() {
return new ExtendedEncoding(new Message(this));
}
}
public static class Unpacker implements ExtendedEncoding.Unpacker<Message> {
@Override
public String getType() {
return TYPE;
}
@Override
public Message unpack(MPMap<MPString, MPType<?>> map) {
Message.Builder builder = new Message.Builder();
builder.subject(str(map.get(mp("subject"))));
builder.body(str(map.get(mp("body"))));
@SuppressWarnings("unchecked")
MPArray<MPBinary> parents = (MPArray<MPBinary>) map.get(mp("parents"));
if (parents != null) {
for (MPBinary parent : parents) {
builder.addParent(InventoryVector.fromHash(parent.getValue()));
}
}
@SuppressWarnings("unchecked")
MPArray<MPMap<MPString, MPType<?>>> files = (MPArray<MPMap<MPString, MPType<?>>>) map.get(mp("files"));
if (files != null) {
for (MPMap<MPString, MPType<?>> item : files) {
Attachment.Builder b = new Attachment.Builder();
b.name(str(item.get(mp("name"))));
b.data(bin(item.get(mp("data"))));
b.type(str(item.get(mp("type"))));
String disposition = str(item.get(mp("disposition")));
if ("inline".equals(disposition)) {
b.inline();
} else if ("attachment".equals(disposition)) {
b.attachment();
}
builder.addFile(b.build());
}
}
return new Message(builder);
}
private byte[] bin(MPType data) {
if (data instanceof MPBinary) {
return ((MPBinary) data).getValue();
} else {
return null;
}
}
}
}

114
core/src/main/java/ch/dissem/bitmessage/entity/valueobject/extended/Vote.java
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@ -1,114 +0,0 @@
package ch.dissem.bitmessage.entity.valueobject.extended;
import ch.dissem.bitmessage.entity.Plaintext;
import ch.dissem.bitmessage.entity.valueobject.ExtendedEncoding;
import ch.dissem.bitmessage.entity.valueobject.InventoryVector;
import ch.dissem.msgpack.types.*;
import java.io.IOException;
import java.util.Objects;
import static ch.dissem.bitmessage.utils.Strings.str;
import static ch.dissem.msgpack.types.Utils.mp;
/**
* Extended encoding type 'vote'. Specification still outstanding, so this will need some work.
*/
public class Vote implements ExtendedEncoding.ExtendedType {
private static final long serialVersionUID = -8427038604209964837L;
public static final String TYPE = "vote";
private InventoryVector msgId;
private String vote;
private Vote(Builder builder) {
msgId = builder.msgId;
vote = builder.vote;
}
@Override
public String getType() {
return TYPE;
}
public InventoryVector getMsgId() {
return msgId;
}
public String getVote() {
return vote;
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
Vote vote1 = (Vote) o;
return Objects.equals(msgId, vote1.msgId) &&
Objects.equals(vote, vote1.vote);
}
@Override
public int hashCode() {
return Objects.hash(msgId, vote);
}
@Override
public MPMap<MPString, MPType<?>> pack() throws IOException {
MPMap<MPString, MPType<?>> result = new MPMap<>();
result.put(mp(""), mp(TYPE));
result.put(mp("msgId"), mp(msgId.getHash()));
result.put(mp("vote"), mp(vote));
return result;
}
public static class Builder {
private InventoryVector msgId;
private String vote;
public ExtendedEncoding up(Plaintext message) {
msgId = message.getInventoryVector();
vote = "1";
return new ExtendedEncoding(new Vote(this));
}
public ExtendedEncoding down(Plaintext message) {
msgId = message.getInventoryVector();
vote = "1";
return new ExtendedEncoding(new Vote(this));
}
public Builder msgId(InventoryVector iv) {
this.msgId = iv;
return this;
}
public Builder vote(String vote) {
this.vote = vote;
return this;
}
public ExtendedEncoding build() {
return new ExtendedEncoding(new Vote(this));
}
}
public static class Unpacker implements ExtendedEncoding.Unpacker<Vote> {
@Override
public String getType() {
return TYPE;
}
@Override
public Vote unpack(MPMap<MPString, MPType<?>> map) {
Vote.Builder builder = new Vote.Builder();
MPType<?> msgId = map.get(mp("msgId"));
if (msgId instanceof MPBinary) {
builder.msgId(InventoryVector.fromHash(((MPBinary) msgId).getValue()));
}
builder.vote(str(map.get(mp("vote"))));
return new Vote(builder);
}
}
}

30
core/src/main/java/ch/dissem/bitmessage/exception/InsufficientProofOfWorkException.java
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@ -1,30 +0,0 @@
/*
* Copyright 2015 Christian Basler
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package ch.dissem.bitmessage.exception;
import ch.dissem.bitmessage.utils.Strings;
import java.io.IOException;
import java.util.Arrays;
public class InsufficientProofOfWorkException extends IOException {
private static final long serialVersionUID = 9105580366564571318L;
public InsufficientProofOfWorkException(byte[] target, byte[] hash) {
super("Insufficient proof of work: " + Strings.hex(target) + " required, " + Strings.hex(Arrays.copyOfRange(hash, 0, 8)) + " achieved.");
}
}

92
core/src/main/java/ch/dissem/bitmessage/factory/BufferPool.java
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@ -1,92 +0,0 @@
/*
* Copyright 2016 Christian Basler
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package ch.dissem.bitmessage.factory;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.nio.ByteBuffer;
import java.util.Map;
import java.util.Stack;
import java.util.TreeMap;
import static ch.dissem.bitmessage.ports.NetworkHandler.HEADER_SIZE;
import static ch.dissem.bitmessage.ports.NetworkHandler.MAX_PAYLOAD_SIZE;
/**
* A pool for {@link ByteBuffer}s. As they may use up a lot of memory,
* they should be reused as efficiently as possible.
*/
class BufferPool {
private static final Logger LOG = LoggerFactory.getLogger(BufferPool.class);
public static final BufferPool bufferPool = new BufferPool();
private final Map<Integer, Stack<ByteBuffer>> pools = new TreeMap<>();
private BufferPool() {
pools.put(HEADER_SIZE, new Stack<ByteBuffer>());
pools.put(54, new Stack<ByteBuffer>());
pools.put(1000, new Stack<ByteBuffer>());
pools.put(60000, new Stack<ByteBuffer>());
pools.put(MAX_PAYLOAD_SIZE, new Stack<ByteBuffer>());
}
public synchronized ByteBuffer allocate(int capacity) {
Integer targetSize = getTargetSize(capacity);
Stack<ByteBuffer> pool = pools.get(targetSize);
if (pool.isEmpty()) {
LOG.trace("Creating new buffer of size " + targetSize);
return ByteBuffer.allocate(targetSize);
} else {
return pool.pop();
}
}
/**
* Returns a buffer that has the size of the Bitmessage network message header, 24 bytes.
*
* @return a buffer of size 24
*/
public synchronized ByteBuffer allocateHeaderBuffer() {
Stack<ByteBuffer> pool = pools.get(HEADER_SIZE);
if (pool.isEmpty()) {
return ByteBuffer.allocate(HEADER_SIZE);
} else {
return pool.pop();
}
}
public synchronized void deallocate(ByteBuffer buffer) {
buffer.clear();
Stack<ByteBuffer> pool = pools.get(buffer.capacity());
if (pool == null) {
throw new IllegalArgumentException("Illegal buffer capacity " + buffer.capacity() +
" one of " + pools.keySet() + " expected.");
} else {
pool.push(buffer);
}
}
private Integer getTargetSize(int capacity) {
for (Integer size : pools.keySet()) {
if (size >= capacity) return size;
}
throw new IllegalArgumentException("Requested capacity too large: " +
"requested=" + capacity + "; max=" + MAX_PAYLOAD_SIZE);
}
}

62
core/src/main/java/ch/dissem/bitmessage/factory/ExtendedEncodingFactory.java
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@ -1,62 +0,0 @@
package ch.dissem.bitmessage.factory;
import ch.dissem.bitmessage.entity.valueobject.ExtendedEncoding;
import ch.dissem.bitmessage.entity.valueobject.extended.Message;
import ch.dissem.bitmessage.entity.valueobject.extended.Vote;
import ch.dissem.bitmessage.exception.ApplicationException;
import ch.dissem.msgpack.Reader;
import ch.dissem.msgpack.types.MPMap;
import ch.dissem.msgpack.types.MPString;
import ch.dissem.msgpack.types.MPType;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
import java.util.zip.InflaterInputStream;
import static ch.dissem.bitmessage.utils.Strings.str;
/**
* Factory that creates {@link ExtendedEncoding} objects from byte arrays. You can register your own types by adding a
* {@link ExtendedEncoding.Unpacker} using {@link #registerFactory(ExtendedEncoding.Unpacker)}.
*/
public class ExtendedEncodingFactory {
private static final Logger LOG = LoggerFactory.getLogger(ExtendedEncodingFactory.class);
private static final ExtendedEncodingFactory INSTANCE = new ExtendedEncodingFactory();
private static final MPString KEY_MESSAGE_TYPE = new MPString("");
private Map<String, ExtendedEncoding.Unpacker<?>> factories = new HashMap<>();
private ExtendedEncodingFactory() {
registerFactory(new Message.Unpacker());
registerFactory(new Vote.Unpacker());
}
public void registerFactory(ExtendedEncoding.Unpacker<?> factory) {
factories.put(factory.getType(), factory);
}
public ExtendedEncoding unzip(byte[] zippedData) {
try (InflaterInputStream unzipper = new InflaterInputStream(new ByteArrayInputStream(zippedData))) {
Reader reader = Reader.getInstance();
@SuppressWarnings("unchecked")
MPMap<MPString, MPType<?>> map = (MPMap<MPString, MPType<?>>) reader.read(unzipper);
MPType<?> messageType = map.get(KEY_MESSAGE_TYPE);
if (messageType == null) {
LOG.error("Missing message type");
return null;
}
ExtendedEncoding.Unpacker<?> factory = factories.get(str(messageType));
return new ExtendedEncoding(factory.unpack(map));
} catch (ClassCastException | IOException e) {
throw new ApplicationException(e);
}
}
public static ExtendedEncodingFactory getInstance() {
return INSTANCE;
}
}

217
core/src/main/java/ch/dissem/bitmessage/factory/Factory.java
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@ -1,217 +0,0 @@
/*
* Copyright 2015 Christian Basler
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package ch.dissem.bitmessage.factory;
import ch.dissem.bitmessage.entity.BitmessageAddress;
import ch.dissem.bitmessage.entity.NetworkMessage;
import ch.dissem.bitmessage.entity.ObjectMessage;
import ch.dissem.bitmessage.entity.Plaintext;
import ch.dissem.bitmessage.entity.payload.*;
import ch.dissem.bitmessage.entity.valueobject.PrivateKey;
import ch.dissem.bitmessage.exception.NodeException;
import ch.dissem.bitmessage.utils.TTL;
import ch.dissem.bitmessage.utils.UnixTime;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.IOException;
import java.io.InputStream;
import java.net.SocketException;
import java.net.SocketTimeoutException;
import static ch.dissem.bitmessage.entity.payload.ObjectType.MSG;
import static ch.dissem.bitmessage.utils.Singleton.cryptography;
/**
* Creates {@link NetworkMessage} objects from {@link InputStream InputStreams}
*/
public class Factory {
private static final Logger LOG = LoggerFactory.getLogger(Factory.class);
public static NetworkMessage getNetworkMessage(int version, InputStream stream) throws SocketTimeoutException {
try {
return V3MessageFactory.read(stream);
} catch (SocketTimeoutException | NodeException e) {
throw e;
} catch (SocketException e) {
throw new NodeException(e.getMessage(), e);
} catch (Exception e) {
LOG.error(e.getMessage(), e);
return null;
}
}
public static ObjectMessage getObjectMessage(int version, InputStream stream, int length) {
try {
return V3MessageFactory.readObject(stream, length);
} catch (IOException e) {
LOG.error(e.getMessage(), e);
return null;
}
}
public static Pubkey createPubkey(long version, long stream, byte[] publicSigningKey, byte[] publicEncryptionKey,
long nonceTrialsPerByte, long extraBytes, Pubkey.Feature... features) {
return createPubkey(version, stream, publicSigningKey, publicEncryptionKey, nonceTrialsPerByte, extraBytes,
Pubkey.Feature.bitfield(features));
}
public static Pubkey createPubkey(long version, long stream, byte[] publicSigningKey, byte[] publicEncryptionKey,
long nonceTrialsPerByte, long extraBytes, int behaviourBitfield) {
if (publicSigningKey.length != 64 && publicSigningKey.length != 65)
throw new IllegalArgumentException("64 bytes signing key expected, but it was "
+ publicSigningKey.length + " bytes long.");
if (publicEncryptionKey.length != 64 && publicEncryptionKey.length != 65)
throw new IllegalArgumentException("64 bytes encryption key expected, but it was "
+ publicEncryptionKey.length + " bytes long.");
switch ((int) version) {
case 2:
return new V2Pubkey.Builder()
.stream(stream)
.publicSigningKey(publicSigningKey)
.publicEncryptionKey(publicEncryptionKey)
.behaviorBitfield(behaviourBitfield)
.build();
case 3:
return new V3Pubkey.Builder()
.stream(stream)
.publicSigningKey(publicSigningKey)
.publicEncryptionKey(publicEncryptionKey)
.behaviorBitfield(behaviourBitfield)
.nonceTrialsPerByte(nonceTrialsPerByte)
.extraBytes(extraBytes)
.build();
case 4:
return new V4Pubkey(
new V3Pubkey.Builder()
.stream(stream)
.publicSigningKey(publicSigningKey)
.publicEncryptionKey(publicEncryptionKey)
.behaviorBitfield(behaviourBitfield)
.nonceTrialsPerByte(nonceTrialsPerByte)
.extraBytes(extraBytes)
.build()
);
default:
throw new IllegalArgumentException("Unexpected pubkey version " + version);
}
}
public static BitmessageAddress createIdentityFromPrivateKey(String address,
byte[] privateSigningKey, byte[] privateEncryptionKey,
long nonceTrialsPerByte, long extraBytes,
int behaviourBitfield) {
BitmessageAddress temp = new BitmessageAddress(address);
PrivateKey privateKey = new PrivateKey(privateSigningKey, privateEncryptionKey,
createPubkey(temp.getVersion(), temp.getStream(),
cryptography().createPublicKey(privateSigningKey),
cryptography().createPublicKey(privateEncryptionKey),
nonceTrialsPerByte, extraBytes, behaviourBitfield));
BitmessageAddress result = new BitmessageAddress(privateKey);
if (!result.getAddress().equals(address)) {
throw new IllegalArgumentException("Address not matching private key. Address: " + address
+ "; Address derived from private key: " + result.getAddress());
}
return result;
}
public static BitmessageAddress generatePrivateAddress(boolean shorter,
long stream,
Pubkey.Feature... features) {
return new BitmessageAddress(new PrivateKey(shorter, stream, 1000, 1000, features));
}
static ObjectPayload getObjectPayload(long objectType,
long version,
long streamNumber,
InputStream stream,
int length) throws IOException {
ObjectType type = ObjectType.fromNumber(objectType);
if (type != null) {
switch (type) {
case GET_PUBKEY:
return parseGetPubkey(version, streamNumber, stream, length);
case PUBKEY:
return parsePubkey(version, streamNumber, stream, length);
case MSG:
return parseMsg(version, streamNumber, stream, length);
case BROADCAST:
return parseBroadcast(version, streamNumber, stream, length);
default:
LOG.error("This should not happen, someone broke something in the code!");
}
}
// fallback: just store the message - we don't really care what it is
LOG.trace("Unexpected object type: " + objectType);
return GenericPayload.read(version, streamNumber, stream, length);
}
private static ObjectPayload parseGetPubkey(long version, long streamNumber, InputStream stream, int length) throws IOException {
return GetPubkey.read(stream, streamNumber, length, version);
}
public static Pubkey readPubkey(long version, long stream, InputStream is, int length, boolean encrypted) throws IOException {
switch ((int) version) {
case 2:
return V2Pubkey.read(is, stream);
case 3:
return V3Pubkey.read(is, stream);
case 4:
return V4Pubkey.read(is, stream, length, encrypted);
}
LOG.debug("Unexpected pubkey version " + version + ", handling as generic payload object");
return null;
}
private static ObjectPayload parsePubkey(long version, long streamNumber, InputStream stream, int length) throws IOException {
Pubkey pubkey = readPubkey(version, streamNumber, stream, length, true);
return pubkey != null ? pubkey : GenericPayload.read(version, streamNumber, stream, length);
}
private static ObjectPayload parseMsg(long version, long streamNumber, InputStream stream, int length) throws IOException {
return Msg.read(stream, streamNumber, length);
}
private static ObjectPayload parseBroadcast(long version, long streamNumber, InputStream stream, int length) throws IOException {
switch ((int) version) {
case 4:
return V4Broadcast.read(stream, streamNumber, length);
case 5:
return V5Broadcast.read(stream, streamNumber, length);
default:
LOG.debug("Encountered unknown broadcast version " + version);
return GenericPayload.read(version, streamNumber, stream, length);
}
}
public static Broadcast getBroadcast(Plaintext plaintext) {
BitmessageAddress sendingAddress = plaintext.getFrom();
if (sendingAddress.getVersion() < 4) {
return new V4Broadcast(sendingAddress, plaintext);
} else {
return new V5Broadcast(sendingAddress, plaintext);
}
}
public static ObjectMessage createAck(Plaintext plaintext) {
if (plaintext == null || plaintext.getAckData() == null)
return null;
GenericPayload ack = new GenericPayload(3, plaintext.getFrom().getStream(), plaintext.getAckData());
return new ObjectMessage.Builder().objectType(MSG).payload(ack).expiresTime(UnixTime.now(plaintext.getTTL())).build();
}
}

236
core/src/main/java/ch/dissem/bitmessage/factory/V3MessageFactory.java
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@ -1,236 +0,0 @@
/*
* Copyright 2015 Christian Basler
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package ch.dissem.bitmessage.factory;
import ch.dissem.bitmessage.entity.*;
import ch.dissem.bitmessage.entity.payload.GenericPayload;
import ch.dissem.bitmessage.entity.payload.ObjectPayload;
import ch.dissem.bitmessage.entity.valueobject.InventoryVector;
import ch.dissem.bitmessage.entity.valueobject.NetworkAddress;
import ch.dissem.bitmessage.exception.NodeException;
import ch.dissem.bitmessage.utils.AccessCounter;
import ch.dissem.bitmessage.utils.Decode;
import ch.dissem.bitmessage.utils.Strings;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import static ch.dissem.bitmessage.entity.NetworkMessage.MAGIC_BYTES;
import static ch.dissem.bitmessage.utils.Singleton.cryptography;
/**
* Creates protocol v3 network messages from {@link InputStream InputStreams}
*/
class V3MessageFactory {
private static Logger LOG = LoggerFactory.getLogger(V3MessageFactory.class);
public static NetworkMessage read(InputStream in) throws IOException {
findMagic(in);
String command = getCommand(in);
int length = (int) Decode.uint32(in);
if (length > 1600003) {
throw new NodeException("Payload of " + length + " bytes received, no more than 1600003 was expected.");
}
byte[] checksum = Decode.bytes(in, 4);
byte[] payloadBytes = Decode.bytes(in, length);
if (testChecksum(checksum, payloadBytes)) {
MessagePayload payload = getPayload(command, new ByteArrayInputStream(payloadBytes), length);
if (payload != null)
return new NetworkMessage(payload);
else
return null;
} else {
throw new IOException("Checksum failed for message '" + command + "'");
}
}
static MessagePayload getPayload(String command, InputStream stream, int length) throws IOException {
switch (command) {
case "version":
return parseVersion(stream);
case "verack":
return new VerAck();
case "addr":
return parseAddr(stream);
case "inv":
return parseInv(stream);
case "getdata":
return parseGetData(stream);
case "object":
return readObject(stream, length);
case "custom":
return readCustom(stream, length);
default:
LOG.debug("Unknown command: " + command);
return null;
}
}
private static MessagePayload readCustom(InputStream in, int length) throws IOException {
return CustomMessage.read(in, length);
}
public static ObjectMessage readObject(InputStream in, int length) throws IOException {
AccessCounter counter = new AccessCounter();
byte nonce[] = Decode.bytes(in, 8, counter);
long expiresTime = Decode.int64(in, counter);
long objectType = Decode.uint32(in, counter);
long version = Decode.varInt(in, counter);
long stream = Decode.varInt(in, counter);
byte[] data = Decode.bytes(in, length - counter.length());
ObjectPayload payload;
try {
ByteArrayInputStream dataStream = new ByteArrayInputStream(data);
payload = Factory.getObjectPayload(objectType, version, stream, dataStream, data.length);
} catch (Exception e) {
if (LOG.isTraceEnabled()) {
LOG.trace("Could not parse object payload - using generic payload instead", e);
LOG.trace(Strings.hex(data).toString());
}
payload = new GenericPayload(version, stream, data);
}
return new ObjectMessage.Builder()
.nonce(nonce)
.expiresTime(expiresTime)
.objectType(objectType)
.stream(stream)
.payload(payload)
.build();
}
private static GetData parseGetData(InputStream stream) throws IOException {
long count = Decode.varInt(stream);
GetData.Builder builder = new GetData.Builder();
for (int i = 0; i < count; i++) {
builder.addInventoryVector(parseInventoryVector(stream));
}
return builder.build();
}
private static Inv parseInv(InputStream stream) throws IOException {
long count = Decode.varInt(stream);
Inv.Builder builder = new Inv.Builder();
for (int i = 0; i < count; i++) {
builder.addInventoryVector(parseInventoryVector(stream));
}
return builder.build();
}
private static Addr parseAddr(InputStream stream) throws IOException {
long count = Decode.varInt(stream);
Addr.Builder builder = new Addr.Builder();
for (int i = 0; i < count; i++) {
builder.addAddress(parseAddress(stream, false));
}
return builder.build();
}
private static Version parseVersion(InputStream stream) throws IOException {
int version = Decode.int32(stream);
long services = Decode.int64(stream);
long timestamp = Decode.int64(stream);
NetworkAddress addrRecv = parseAddress(stream, true);
NetworkAddress addrFrom = parseAddress(stream, true);
long nonce = Decode.int64(stream);
String userAgent = Decode.varString(stream);
long[] streamNumbers = Decode.varIntList(stream);
return new Version.Builder()
.version(version)
.services(services)
.timestamp(timestamp)
.addrRecv(addrRecv).addrFrom(addrFrom)
.nonce(nonce)
.userAgent(userAgent)
.streams(streamNumbers).build();
}
private static InventoryVector parseInventoryVector(InputStream stream) throws IOException {
return InventoryVector.fromHash(Decode.bytes(stream, 32));
}
private static NetworkAddress parseAddress(InputStream stream, boolean light) throws IOException {
long time;
long streamNumber;
if (!light) {
time = Decode.int64(stream);
streamNumber = Decode.uint32(stream); // This isn't consistent, not sure if this is correct
} else {
time = 0;
streamNumber = 0;
}
long services = Decode.int64(stream);
byte[] ipv6 = Decode.bytes(stream, 16);
int port = Decode.uint16(stream);
return new NetworkAddress.Builder()
.time(time)
.stream(streamNumber)
.services(services)
.ipv6(ipv6)
.port(port)
.build();
}
private static boolean testChecksum(byte[] checksum, byte[] payload) {
byte[] payloadChecksum = cryptography().sha512(payload);
for (int i = 0; i < checksum.length; i++) {
if (checksum[i] != payloadChecksum[i]) {
return false;
}
}
return true;
}
private static String getCommand(InputStream stream) throws IOException {
byte[] bytes = new byte[12];
int end = bytes.length;
for (int i = 0; i < bytes.length; i++) {
bytes[i] = (byte) stream.read();
if (end == bytes.length) {
if (bytes[i] == 0) end = i;
} else {
if (bytes[i] != 0) throw new IOException("'\\0' padding expected for command");
}
}
return new String(bytes, 0, end, "ASCII");
}
private static void findMagic(InputStream in) throws IOException {
int pos = 0;
for (int i = 0; i < 1620000; i++) {
byte b = (byte) in.read();
if (b == MAGIC_BYTES[pos]) {
if (pos + 1 == MAGIC_BYTES.length) {
return;
}
} else if (pos > 0 && b == MAGIC_BYTES[0]) {
pos = 1;
} else {
pos = 0;
}
pos++;
}
throw new NodeException("Failed to find MAGIC bytes in stream");
}
}

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@ -1,189 +0,0 @@
/*
* Copyright 2016 Christian Basler
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package ch.dissem.bitmessage.factory;
import ch.dissem.bitmessage.entity.MessagePayload;
import ch.dissem.bitmessage.entity.NetworkMessage;
import ch.dissem.bitmessage.exception.ApplicationException;
import ch.dissem.bitmessage.exception.NodeException;
import ch.dissem.bitmessage.utils.Decode;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.nio.ByteBuffer;
import java.util.LinkedList;
import java.util.List;
import static ch.dissem.bitmessage.entity.NetworkMessage.MAGIC_BYTES;
import static ch.dissem.bitmessage.factory.BufferPool.bufferPool;
import static ch.dissem.bitmessage.ports.NetworkHandler.MAX_PAYLOAD_SIZE;
import static ch.dissem.bitmessage.utils.Singleton.cryptography;
/**
* Similar to the {@link V3MessageFactory}, but used for NIO buffers which may or may not contain a whole message.
*/
public class V3MessageReader {
private ByteBuffer headerBuffer;
private ByteBuffer dataBuffer;
private ReaderState state = ReaderState.MAGIC;
private String command;
private int length;
private byte[] checksum;
private List<NetworkMessage> messages = new LinkedList<>();
public ByteBuffer getActiveBuffer() {
if (state != null && state != ReaderState.DATA) {
if (headerBuffer == null) {
headerBuffer = bufferPool.allocateHeaderBuffer();
}
}
return state == ReaderState.DATA ? dataBuffer : headerBuffer;
}
public void update() {
if (state != ReaderState.DATA) {
getActiveBuffer();
headerBuffer.flip();
}
switch (state) {
case MAGIC:
if (!findMagicBytes(headerBuffer)) {
headerBuffer.compact();
return;
}
state = ReaderState.HEADER;
case HEADER:
if (headerBuffer.remaining() < 20) {
headerBuffer.compact();
headerBuffer.limit(20);
return;
}
command = getCommand(headerBuffer);
length = (int) Decode.uint32(headerBuffer);
if (length > MAX_PAYLOAD_SIZE) {
throw new NodeException("Payload of " + length + " bytes received, no more than " +
MAX_PAYLOAD_SIZE + " was expected.");
}
checksum = new byte[4];
headerBuffer.get(checksum);
state = ReaderState.DATA;
bufferPool.deallocate(headerBuffer);
headerBuffer = null;
dataBuffer = bufferPool.allocate(length);
dataBuffer.clear();
dataBuffer.limit(length);
case DATA:
if (dataBuffer.position() < length) {
return;
} else {
dataBuffer.flip();
}
if (!testChecksum(dataBuffer)) {
state = ReaderState.MAGIC;
throw new NodeException("Checksum failed for message '" + command + "'");
}
try {
MessagePayload payload = V3MessageFactory.getPayload(
command,
new ByteArrayInputStream(dataBuffer.array(),
dataBuffer.arrayOffset() + dataBuffer.position(), length),
length);
if (payload != null) {
messages.add(new NetworkMessage(payload));
}
} catch (IOException e) {
throw new NodeException(e.getMessage());
} finally {
state = ReaderState.MAGIC;
bufferPool.deallocate(dataBuffer);
dataBuffer = null;
dataBuffer = null;
}
}
}
public List<NetworkMessage> getMessages() {
return messages;
}
private boolean findMagicBytes(ByteBuffer buffer) {
int i = 0;
while (buffer.hasRemaining()) {
if (i == 0) {
buffer.mark();
}
if (buffer.get() == MAGIC_BYTES[i]) {
i++;
if (i == MAGIC_BYTES.length) {
return true;
}
} else {
i = 0;
}
}
if (i > 0) {
buffer.reset();
}
return false;
}
private static String getCommand(ByteBuffer buffer) {
int start = buffer.position();
int l = 0;
while (l < 12 && buffer.get() != 0) l++;
int i = l + 1;
while (i < 12) {
if (buffer.get() != 0) throw new NodeException("'\\0' padding expected for command");
i++;
}
try {
return new String(buffer.array(), start, l, "ASCII");
} catch (UnsupportedEncodingException e) {
throw new ApplicationException(e);
}
}
private boolean testChecksum(ByteBuffer buffer) {
byte[] payloadChecksum = cryptography().sha512(buffer.array(),
buffer.arrayOffset() + buffer.position(), length);
for (int i = 0; i < checksum.length; i++) {
if (checksum[i] != payloadChecksum[i]) {
return false;
}
}
return true;
}
/**
* De-allocates all buffers. This method should be called iff the reader isn't used anymore, i.e. when its
* connection is severed.
*/
public void cleanup() {
state = null;
if (headerBuffer != null) {
bufferPool.deallocate(headerBuffer);
}
if (dataBuffer != null) {
bufferPool.deallocate(dataBuffer);
}
}
private enum ReaderState {MAGIC, HEADER, DATA}
}

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@ -1,214 +0,0 @@
/*
* Copyright 2015 Christian Basler
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package ch.dissem.bitmessage.ports;
import ch.dissem.bitmessage.InternalContext;
import ch.dissem.bitmessage.entity.ObjectMessage;
import ch.dissem.bitmessage.entity.payload.Pubkey;
import ch.dissem.bitmessage.exception.ApplicationException;
import ch.dissem.bitmessage.exception.InsufficientProofOfWorkException;
import ch.dissem.bitmessage.factory.Factory;
import ch.dissem.bitmessage.utils.Bytes;
import ch.dissem.bitmessage.utils.UnixTime;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import javax.crypto.Mac;
import javax.crypto.spec.SecretKeySpec;
import java.io.IOException;
import java.math.BigInteger;
import java.security.*;
import static ch.dissem.bitmessage.InternalContext.NETWORK_EXTRA_BYTES;
import static ch.dissem.bitmessage.InternalContext.NETWORK_NONCE_TRIALS_PER_BYTE;
import static ch.dissem.bitmessage.utils.Numbers.max;
/**
* Implements everything that isn't directly dependent on either Spongy- or Bouncycastle.
*/
public abstract class AbstractCryptography implements Cryptography, InternalContext.ContextHolder {
protected static final Logger LOG = LoggerFactory.getLogger(Cryptography.class);
private static final SecureRandom RANDOM = new SecureRandom();
private static final BigInteger TWO = BigInteger.valueOf(2);
private static final BigInteger TWO_POW_64 = TWO.pow(64);
private static final BigInteger TWO_POW_16 = TWO.pow(16);
protected static final String ALGORITHM_ECDSA = "ECDSA";
protected static final String ALGORITHM_ECDSA_SHA1 = "SHA1withECDSA";
protected static final String ALGORITHM_EVP_SHA256 = "SHA256withECDSA";
protected final Provider provider;
private InternalContext context;
protected AbstractCryptography(Provider provider) {
this.provider = provider;
}
@Override
public void setContext(InternalContext context) {
this.context = context;
}
public byte[] sha512(byte[] data, int offset, int length) {
MessageDigest mda = md("SHA-512");
mda.update(data, offset, length);
return mda.digest();
}
public byte[] sha512(byte[]... data) {
return hash("SHA-512", data);
}
public byte[] doubleSha512(byte[]... data) {
MessageDigest mda = md("SHA-512");
for (byte[] d : data) {
mda.update(d);
}
return mda.digest(mda.digest());
}
public byte[] doubleSha512(byte[] data, int length) {
MessageDigest mda = md("SHA-512");
mda.update(data, 0, length);
return mda.digest(mda.digest());
}
public byte[] ripemd160(byte[]... data) {
return hash("RIPEMD160", data);
}
public byte[] doubleSha256(byte[] data, int length) {
MessageDigest mda = md("SHA-256");
mda.update(data, 0, length);
return mda.digest(mda.digest());
}
public byte[] sha1(byte[]... data) {
return hash("SHA-1", data);
}
public byte[] randomBytes(int length) {
byte[] result = new byte[length];
RANDOM.nextBytes(result);
return result;
}
public void doProofOfWork(ObjectMessage object, long nonceTrialsPerByte,
long extraBytes, ProofOfWorkEngine.Callback callback) {
nonceTrialsPerByte = max(nonceTrialsPerByte, NETWORK_NONCE_TRIALS_PER_BYTE);
extraBytes = max(extraBytes, NETWORK_EXTRA_BYTES);
byte[] initialHash = getInitialHash(object);
byte[] target = getProofOfWorkTarget(object, nonceTrialsPerByte, extraBytes);
context.getProofOfWorkEngine().calculateNonce(initialHash, target, callback);
}
public void checkProofOfWork(ObjectMessage object, long nonceTrialsPerByte, long extraBytes)
throws IOException {
byte[] target = getProofOfWorkTarget(object, nonceTrialsPerByte, extraBytes);
byte[] value = doubleSha512(object.getNonce(), getInitialHash(object));
if (Bytes.lt(target, value, 8)) {
throw new InsufficientProofOfWorkException(target, value);
}
}
protected byte[] doSign(byte[] data, java.security.PrivateKey privKey) throws GeneralSecurityException {
// TODO: change this to ALGORITHM_EVP_SHA256 once it's generally used in the network
Signature sig = Signature.getInstance(ALGORITHM_ECDSA_SHA1, provider);
sig.initSign(privKey);
sig.update(data);
return sig.sign();
}
protected boolean doCheckSignature(byte[] data, byte[] signature, PublicKey publicKey) throws GeneralSecurityException {
for (String algorithm : new String[]{ALGORITHM_ECDSA_SHA1, ALGORITHM_EVP_SHA256}) {
Signature sig = Signature.getInstance(algorithm, provider);
sig.initVerify(publicKey);
sig.update(data);
if (sig.verify(signature)) {
return true;
}
}
return false;
}
@Override
public byte[] getInitialHash(ObjectMessage object) {
return sha512(object.getPayloadBytesWithoutNonce());
}
@Override
public byte[] getProofOfWorkTarget(ObjectMessage object, long nonceTrialsPerByte, long extraBytes) {
if (nonceTrialsPerByte == 0) nonceTrialsPerByte = NETWORK_NONCE_TRIALS_PER_BYTE;
if (extraBytes == 0) extraBytes = NETWORK_EXTRA_BYTES;
BigInteger TTL = BigInteger.valueOf(object.getExpiresTime() - UnixTime.now());
BigInteger powLength = BigInteger.valueOf(object.getPayloadBytesWithoutNonce().length + extraBytes);
BigInteger denominator = BigInteger.valueOf(nonceTrialsPerByte)
.multiply(
powLength.add(
powLength.multiply(TTL).divide(TWO_POW_16)
)
);
return Bytes.expand(TWO_POW_64.divide(denominator).toByteArray(), 8);
}
private byte[] hash(String algorithm, byte[]... data) {
MessageDigest mda = md(algorithm);
for (byte[] d : data) {
mda.update(d);
}
return mda.digest();
}
private MessageDigest md(String algorithm) {
try {
return MessageDigest.getInstance(algorithm, provider);
} catch (GeneralSecurityException e) {
throw new ApplicationException(e);
}
}
public byte[] mac(byte[] key_m, byte[] data) {
try {
Mac mac = Mac.getInstance("HmacSHA256", provider);
mac.init(new SecretKeySpec(key_m, "HmacSHA256"));
return mac.doFinal(data);
} catch (GeneralSecurityException e) {
throw new ApplicationException(e);
}
}
public Pubkey createPubkey(long version, long stream, byte[] privateSigningKey, byte[] privateEncryptionKey,
long nonceTrialsPerByte, long extraBytes, Pubkey.Feature... features) {
return Factory.createPubkey(version, stream,
createPublicKey(privateSigningKey),
createPublicKey(privateEncryptionKey),
nonceTrialsPerByte, extraBytes, features);
}
public BigInteger keyToBigInt(byte[] privateKey) {
return new BigInteger(1, privateKey);
}
public long randomNonce() {
return RANDOM.nextLong();
}
}

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@ -1,162 +0,0 @@
/*
* Copyright 2016 Christian Basler
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package ch.dissem.bitmessage.ports;
import ch.dissem.bitmessage.InternalContext;
import ch.dissem.bitmessage.entity.BitmessageAddress;
import ch.dissem.bitmessage.entity.Plaintext;
import ch.dissem.bitmessage.entity.valueobject.InventoryVector;
import ch.dissem.bitmessage.entity.valueobject.Label;
import ch.dissem.bitmessage.exception.ApplicationException;
import ch.dissem.bitmessage.utils.Strings;
import ch.dissem.bitmessage.utils.UnixTime;
import java.util.Collection;
import java.util.Collections;
import java.util.List;
import java.util.UUID;
import static ch.dissem.bitmessage.utils.SqlStrings.join;
public abstract class AbstractMessageRepository implements MessageRepository, InternalContext.ContextHolder {
protected InternalContext ctx;
@Override
public void setContext(InternalContext context) {
this.ctx = context;
}
/**
* @deprecated use {@link #saveContactIfNecessary(BitmessageAddress)} instead.
*/
@Deprecated
protected void safeSenderIfNecessary(Plaintext message) {
if (message.getId() == null) {
saveContactIfNecessary(message.getFrom());
}
}
protected void saveContactIfNecessary(BitmessageAddress contact) {
if (contact != null) {
BitmessageAddress savedAddress = ctx.getAddressRepository().getAddress(contact.getAddress());
if (savedAddress == null) {
ctx.getAddressRepository().save(contact);
} else if (savedAddress.getPubkey() == null && contact.getPubkey() != null) {
savedAddress.setPubkey(contact.getPubkey());
ctx.getAddressRepository().save(savedAddress);
}
if (savedAddress != null) {
contact.setAlias(savedAddress.getAlias());
}
}
}
@Override
public Plaintext getMessage(Object id) {
if (id instanceof Long) {
return single(find("id=" + id));
} else {
throw new IllegalArgumentException("Long expected for ID");
}
}
@Override
public Plaintext getMessage(InventoryVector iv) {
return single(find("iv=X'" + Strings.hex(iv.getHash()) + "'"));
}
@Override
public Plaintext getMessage(byte[] initialHash) {
return single(find("initial_hash=X'" + Strings.hex(initialHash) + "'"));
}
@Override
public Plaintext getMessageForAck(byte[] ackData) {
return single(find("ack_data=X'" + Strings.hex(ackData) + "' AND status='" + Plaintext.Status.SENT + "'"));
}
@Override
public List<Plaintext> findMessages(Label label) {
if (label == null) {
return find("id NOT IN (SELECT message_id FROM Message_Label)");
} else {
return find("id IN (SELECT message_id FROM Message_Label WHERE label_id=" + label.getId() + ")");
}
}
@Override
public List<Plaintext> findMessages(Plaintext.Status status, BitmessageAddress recipient) {
return find("status='" + status.name() + "' AND recipient='" + recipient.getAddress() + "'");
}
@Override
public List<Plaintext> findMessages(Plaintext.Status status) {
return find("status='" + status.name() + "'");
}
@Override
public List<Plaintext> findMessages(BitmessageAddress sender) {
return find("sender='" + sender.getAddress() + "'");
}
@Override
public List<Plaintext> findMessagesToResend() {
return find("status='" + Plaintext.Status.SENT.name() + "'" +
" AND next_try < " + UnixTime.now());
}
@Override
public List<Plaintext> findResponses(Plaintext parent) {
if (parent.getInventoryVector() == null) {
return Collections.emptyList();
}
return find("iv IN (SELECT child FROM Message_Parent"
+ " WHERE parent=X'" + Strings.hex(parent.getInventoryVector().getHash()) + "')");
}
@Override
public List<Plaintext> getConversation(UUID conversationId) {
return find("conversation=X'" + conversationId.toString().replace("-", "") + "'");
}
@Override
public List<Label> getLabels() {
return findLabels("1=1");
}
@Override
public List<Label> getLabels(Label.Type... types) {
return findLabels("type IN (" + join(types) + ")");
}
protected abstract List<Label> findLabels(String where);
protected <T> T single(Collection<T> collection) {
switch (collection.size()) {
case 0:
return null;
case 1:
return collection.iterator().next();
default:
throw new ApplicationException("This shouldn't happen, found " + collection.size() +
" items, one or none was expected");
}
}
protected abstract List<Plaintext> find(String where);
}

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/*
* Copyright 2016 Christian Basler
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package ch.dissem.bitmessage.ports;
import ch.dissem.bitmessage.InternalContext;
import ch.dissem.bitmessage.entity.Plaintext;
import ch.dissem.bitmessage.entity.valueobject.Label;
import static ch.dissem.bitmessage.entity.Plaintext.Status.*;
public class DefaultLabeler implements Labeler, InternalContext.ContextHolder {
private InternalContext ctx;
@Override
public void setLabels(Plaintext msg) {
msg.setStatus(RECEIVED);
if (msg.getType() == Plaintext.Type.BROADCAST) {
msg.addLabels(ctx.getMessageRepository().getLabels(Label.Type.INBOX, Label.Type.BROADCAST, Label.Type.UNREAD));
} else {
msg.addLabels(ctx.getMessageRepository().getLabels(Label.Type.INBOX, Label.Type.UNREAD));
}
}
@Override
public void markAsDraft(Plaintext msg) {
msg.setStatus(DRAFT);
msg.addLabels(ctx.getMessageRepository().getLabels(Label.Type.DRAFT));
}
@Override
public void markAsSending(Plaintext msg) {
if (msg.getTo() != null && msg.getTo().getPubkey() == null) {
msg.setStatus(PUBKEY_REQUESTED);
} else {
msg.setStatus(DOING_PROOF_OF_WORK);
}
msg.removeLabel(Label.Type.DRAFT);
msg.addLabels(ctx.getMessageRepository().getLabels(Label.Type.OUTBOX));
}
@Override
public void markAsSent(Plaintext msg) {
msg.setStatus(SENT);
msg.removeLabel(Label.Type.OUTBOX);
msg.addLabels(ctx.getMessageRepository().getLabels(Label.Type.SENT));
}
@Override
public void markAsAcknowledged(Plaintext msg) {
msg.setStatus(SENT_ACKNOWLEDGED);
}
@Override
public void markAsRead(Plaintext msg) {
msg.removeLabel(Label.Type.UNREAD);
}
@Override
public void markAsUnread(Plaintext msg) {
msg.addLabels(ctx.getMessageRepository().getLabels(Label.Type.UNREAD));
}
@Override
public void delete(Plaintext msg) {
msg.getLabels().clear();
msg.addLabels(ctx.getMessageRepository().getLabels(Label.Type.TRASH));
}
@Override
public void archive(Plaintext msg) {
msg.getLabels().clear();
}
@Override
public void setContext(InternalContext ctx) {
this.ctx = ctx;
}
}

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/*
* Copyright 2015 Christian Basler
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package ch.dissem.bitmessage.ports;
import ch.dissem.bitmessage.entity.BitmessageAddress;
import ch.dissem.bitmessage.entity.Plaintext;
import ch.dissem.bitmessage.entity.Plaintext.Status;
import ch.dissem.bitmessage.entity.valueobject.InventoryVector;
import ch.dissem.bitmessage.entity.valueobject.Label;
import java.util.Collection;
import java.util.List;
import java.util.UUID;
public interface MessageRepository {
List<Label> getLabels();
List<Label> getLabels(Label.Type... types);
int countUnread(Label label);
Plaintext getMessage(Object id);
Plaintext getMessage(InventoryVector iv);
Plaintext getMessage(byte[] initialHash);
Plaintext getMessageForAck(byte[] ackData);
/**
* @param label to search for
* @return a distinct list of all conversations that have at least one message with the given label.
*/
List<UUID> findConversations(Label label);
List<Plaintext> findMessages(Label label);
List<Plaintext> findMessages(Status status);
List<Plaintext> findMessages(Status status, BitmessageAddress recipient);
List<Plaintext> findMessages(BitmessageAddress sender);
List<Plaintext> findResponses(Plaintext parent);
List<Plaintext> findMessagesToResend();
void save(Plaintext message);
void remove(Plaintext message);
/**
* Returns all messages with this conversation ID. The returned messages aren't sorted in any way,
* so you may prefer to use {@link ch.dissem.bitmessage.utils.ConversationService#getConversation(UUID)}
* instead.
*
* @param conversationId ID of the requested conversation
* @return all messages with the given conversation ID
*/
Collection<Plaintext> getConversation(UUID conversationId);
}

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/*
* Copyright 2015 Christian Basler
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package ch.dissem.bitmessage.ports;
import ch.dissem.bitmessage.exception.ApplicationException;
import ch.dissem.bitmessage.utils.Bytes;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.*;
import static ch.dissem.bitmessage.utils.Bytes.inc;
import static ch.dissem.bitmessage.utils.ThreadFactoryBuilder.pool;
/**
* A POW engine using all available CPU cores.
*/
public class MultiThreadedPOWEngine implements ProofOfWorkEngine {
private static final Logger LOG = LoggerFactory.getLogger(MultiThreadedPOWEngine.class);
private final ExecutorService waiterPool = Executors.newSingleThreadExecutor(pool("POW-waiter").daemon().build());
private final ExecutorService workerPool = Executors.newCachedThreadPool(pool("POW-worker").daemon().build());
/**
* This method will block until all pending nonce calculations are done, but not wait for its own calculation
* to finish.
* (This implementation becomes very inefficient if multiple nonce are calculated at the same time.)
*
* @param initialHash the SHA-512 hash of the object to send, sans nonce
* @param target the target, representing an unsigned long
* @param callback called with the calculated nonce as argument. The ProofOfWorkEngine implementation must make
*/
@Override
public void calculateNonce(final byte[] initialHash, final byte[] target, final Callback callback) {
waiterPool.execute(new Runnable() {
@Override
public void run() {
long startTime = System.currentTimeMillis();
int cores = Runtime.getRuntime().availableProcessors();
if (cores > 255) cores = 255;
LOG.info("Doing POW using " + cores + " cores");
List<Worker> workers = new ArrayList<>(cores);
for (int i = 0; i < cores; i++) {
Worker w = new Worker((byte) cores, i, initialHash, target);
workers.add(w);
}
List<Future<byte[]>> futures = new ArrayList<>(cores);
for (Worker w : workers) {
// Doing this in the previous loop might cause a ConcurrentModificationException in the worker
// if a worker finds a nonce while new ones are still being added.
futures.add(workerPool.submit(w));
}
try {
while (!Thread.interrupted()) {
for (Future<byte[]> future : futures) {
if (future.isDone()) {
callback.onNonceCalculated(initialHash, future.get());
LOG.info("Nonce calculated in " + ((System.currentTimeMillis() - startTime) / 1000) + " seconds");
for (Future<byte[]> f : futures) {
f.cancel(true);
}
return;
}
}
Thread.sleep(100);
}
LOG.error("POW waiter thread interrupted - this should not happen!");
} catch (ExecutionException e) {
LOG.error(e.getMessage(), e);
} catch (InterruptedException e) {
LOG.error("POW waiter thread interrupted - this should not happen!", e);
}
}
});
}
private class Worker implements Callable<byte[]> {
private final byte numberOfCores;
private final byte[] initialHash;
private final byte[] target;
private final MessageDigest mda;
private final byte[] nonce = new byte[8];
Worker(byte numberOfCores, int core, byte[] initialHash, byte[] target) {
this.numberOfCores = numberOfCores;
this.initialHash = initialHash;
this.target = target;
this.nonce[7] = (byte) core;
try {
mda = MessageDigest.getInstance("SHA-512");
} catch (NoSuchAlgorithmException e) {
LOG.error(e.getMessage(), e);
throw new ApplicationException(e);
}
}
@Override
public byte[] call() throws Exception {
do {
inc(nonce, numberOfCores);
mda.update(nonce);
mda.update(initialHash);
if (!Bytes.lt(target, mda.digest(mda.digest()), 8)) {
return nonce;
}
} while (!Thread.interrupted());
return null;
}
}
}

54
core/src/main/java/ch/dissem/bitmessage/ports/NodeRegistryHelper.java
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@ -1,54 +0,0 @@
package ch.dissem.bitmessage.ports;
import ch.dissem.bitmessage.entity.valueobject.NetworkAddress;
import ch.dissem.bitmessage.exception.ApplicationException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.IOException;
import java.io.InputStream;
import java.net.InetAddress;
import java.util.*;
/**
* Helper class to kick start node registries.
*/
public class NodeRegistryHelper {
private static final Logger LOG = LoggerFactory.getLogger(NodeRegistryHelper.class);
public static Map<Long, Set<NetworkAddress>> loadStableNodes() {
try (InputStream in = NodeRegistryHelper.class.getClassLoader().getResourceAsStream("nodes.txt")) {
Scanner scanner = new Scanner(in);
long stream = 0;
Map<Long, Set<NetworkAddress>> result = new HashMap<>();
Set<NetworkAddress> streamSet = null;
while (scanner.hasNext()) {
try {
String line = scanner.nextLine().trim();
if (line.startsWith("[stream")) {
stream = Long.parseLong(line.substring(8, line.lastIndexOf(']')));
streamSet = new HashSet<>();
result.put(stream, streamSet);
} else if (streamSet != null && !line.isEmpty() && !line.startsWith("#")) {
int portIndex = line.lastIndexOf(':');
InetAddress[] inetAddresses = InetAddress.getAllByName(line.substring(0, portIndex));
int port = Integer.valueOf(line.substring(portIndex + 1));
for (InetAddress inetAddress : inetAddresses) {
streamSet.add(new NetworkAddress.Builder().ip(inetAddress).port(port).stream(stream).build());
}
}
} catch (IOException e) {
LOG.warn(e.getMessage(), e);
}
}
if (LOG.isDebugEnabled()) {
for (Map.Entry<Long, Set<NetworkAddress>> e : result.entrySet()) {
LOG.debug("Stream " + e.getKey() + ": loaded " + e.getValue().size() + " bootstrap nodes.");
}
}
return result;
} catch (IOException e) {
throw new ApplicationException(e);
}
}
}

45
core/src/main/java/ch/dissem/bitmessage/ports/ProofOfWorkRepository.java
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@ -1,45 +0,0 @@
package ch.dissem.bitmessage.ports;
import ch.dissem.bitmessage.entity.ObjectMessage;
import ch.dissem.bitmessage.entity.Plaintext;
import java.util.List;
/**
* Objects that proof of work is currently being done for.
*
* @author Christian Basler
*/
public interface ProofOfWorkRepository {
Item getItem(byte[] initialHash);
List<byte[]> getItems();
void putObject(ObjectMessage object, long nonceTrialsPerByte, long extraBytes);
void putObject(Item item);
void removeObject(byte[] initialHash);
class Item {
public final ObjectMessage object;
public final long nonceTrialsPerByte;
public final long extraBytes;
// Needed for ACK POW calculation
public final Long expirationTime;
public final Plaintext message;
public Item(ObjectMessage object, long nonceTrialsPerByte, long extraBytes) {
this(object, nonceTrialsPerByte, extraBytes, 0, null);
}
public Item(ObjectMessage object, long nonceTrialsPerByte, long extraBytes, long expirationTime, Plaintext message) {
this.object = object;
this.nonceTrialsPerByte = nonceTrialsPerByte;
this.extraBytes = extraBytes;
this.expirationTime = expirationTime;
this.message = message;
}
}
}

50
core/src/main/java/ch/dissem/bitmessage/ports/SimplePOWEngine.java
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@ -1,50 +0,0 @@
/*
* Copyright 2015 Christian Basler
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package ch.dissem.bitmessage.ports;
import ch.dissem.bitmessage.exception.ApplicationException;
import ch.dissem.bitmessage.utils.Bytes;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import static ch.dissem.bitmessage.utils.Bytes.inc;
/**
* You should really use the MultiThreadedPOWEngine, but this one might help you grok the other one.
* <p>
* <strong>Warning:</strong> implementations probably depend on POW being asynchronous, that's
* another reason not to use this one.
* </p>
*/
public class SimplePOWEngine implements ProofOfWorkEngine {
@Override
public void calculateNonce(byte[] initialHash, byte[] target, Callback callback) {
try {
MessageDigest mda = MessageDigest.getInstance("SHA-512");
byte[] nonce = new byte[8];
do {
inc(nonce);
mda.update(nonce);
mda.update(initialHash);
} while (Bytes.lt(target, mda.digest(mda.digest()), 8));
callback.onNonceCalculated(initialHash, nonce);
} catch (NoSuchAlgorithmException e) {
throw new ApplicationException(e);
}
}
}

168
core/src/main/java/ch/dissem/bitmessage/utils/Base58.java
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@ -1,168 +0,0 @@
/*
* Copyright 2011 Google Inc.
* Copyright 2015 Christian Basler
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package ch.dissem.bitmessage.utils;
import ch.dissem.bitmessage.exception.AddressFormatException;
import ch.dissem.bitmessage.exception.ApplicationException;
import java.io.UnsupportedEncodingException;
import static java.util.Arrays.copyOfRange;
/**
* Base58 encoder and decoder.
*
* @author Christian Basler: I removed some dependencies to the BitcoinJ code so it can be used here more easily.
*/
public class Base58 {
private static final int[] INDEXES = new int[128];
private static final char[] ALPHABET = "123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz".toCharArray();
static {
for (int i = 0; i < INDEXES.length; i++) {
INDEXES[i] = -1;
}
for (int i = 0; i < ALPHABET.length; i++) {
INDEXES[ALPHABET[i]] = i;
}
}
/**
* Encodes the given bytes in base58. No checksum is appended.
*
* @param data to encode
* @return base58 encoded input
*/
public static String encode(byte[] data) {
if (data.length == 0) {
return "";
}
final byte[] bytes = copyOfRange(data, 0, data.length);
// Count leading zeroes.
int zeroCount = 0;
while (zeroCount < bytes.length && bytes[zeroCount] == 0) {
++zeroCount;
}
// The actual encoding.
byte[] temp = new byte[bytes.length * 2];
int j = temp.length;
int startAt = zeroCount;
while (startAt < bytes.length) {
byte mod = divmod58(bytes, startAt);
if (bytes[startAt] == 0) {
++startAt;
}
temp[--j] = (byte) ALPHABET[mod];
}
// Strip extra '1' if there are some after decoding.
while (j < temp.length && temp[j] == ALPHABET[0]) {
++j;
}
// Add as many leading '1' as there were leading zeros.
while (--zeroCount >= 0) {
temp[--j] = (byte) ALPHABET[0];
}
byte[] output = copyOfRange(temp, j, temp.length);
try {
return new String(output, "US-ASCII");
} catch (UnsupportedEncodingException e) {
throw new ApplicationException(e); // Cannot happen.
}
}
public static byte[] decode(String input) throws AddressFormatException {
if (input.length() == 0) {
return new byte[0];
}
byte[] input58 = new byte[input.length()];
// Transform the String to a base58 byte sequence
for (int i = 0; i < input.length(); ++i) {
char c = input.charAt(i);
int digit58 = -1;
if (c < 128) {
digit58 = INDEXES[c];
}
if (digit58 < 0) {
throw new AddressFormatException("Illegal character " + c + " at " + i);
}
input58[i] = (byte) digit58;
}
// Count leading zeroes
int zeroCount = 0;
while (zeroCount < input58.length && input58[zeroCount] == 0) {
++zeroCount;
}
// The encoding
byte[] temp = new byte[input.length()];
int j = temp.length;
int startAt = zeroCount;
while (startAt < input58.length) {
byte mod = divmod256(input58, startAt);
if (input58[startAt] == 0) {
++startAt;
}
temp[--j] = mod;
}
// Do no add extra leading zeroes, move j to first non null byte.
while (j < temp.length && temp[j] == 0) {
++j;
}
return copyOfRange(temp, j - zeroCount, temp.length);
}
//
// number -> number / 58, returns number % 58
//
private static byte divmod58(byte[] number, int startAt) {
int remainder = 0;
for (int i = startAt; i < number.length; i++) {
int digit256 = (int) number[i] & 0xFF;
int temp = remainder * 256 + digit256;
number[i] = (byte) (temp / 58);
remainder = temp % 58;
}
return (byte) remainder;
}
//
// number -> number / 256, returns number % 256
//
private static byte divmod256(byte[] number58, int startAt) {
int remainder = 0;
for (int i = startAt; i < number58.length; i++) {
int digit58 = (int) number58[i] & 0xFF;
int temp = remainder * 58 + digit58;
number58[i] = (byte) (temp / 256);
remainder = temp % 256;
}
return (byte) remainder;
}
}

6
core/src/main/java/ch/dissem/bitmessage/utils/Bytes.java
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@ -1,5 +1,5 @@
/* /*
* Copyright 2015 Christian Basler * Copyright 2017 Christian Basler
* *
* Licensed under the Apache License, Version 2.0 (the "License"); * Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License. * you may not use this file except in compliance with the License.
@ -21,6 +21,10 @@ package ch.dissem.bitmessage.utils;
* This is one part due to the fact that Java doesn't support unsigned numbers, and another * This is one part due to the fact that Java doesn't support unsigned numbers, and another
* part so we don't have to convert between byte arrays and numbers in time critical * part so we don't have to convert between byte arrays and numbers in time critical
* situations. * situations.
* <p>
* Note: This class can't yet be ported to Kotlin, as with Kotlin byte + byte = int, which
* would be rather inefficient in our case.
* </p>
*/ */
public class Bytes { public class Bytes {
public static final byte BYTE_0x80 = (byte) 0x80; public static final byte BYTE_0x80 = (byte) 0x80;

71
core/src/main/java/ch/dissem/bitmessage/utils/Collections.java
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@ -1,71 +0,0 @@
/*
* Copyright 2015 Christian Basler
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package ch.dissem.bitmessage.utils;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import java.util.Random;
public class Collections {
private final static Random RANDOM = new Random();
/**
* @param count the number of elements to return (if possible)
* @param collection the collection to take samples from
* @return a random subset of the given collection, or a copy of the collection if it's not larger than count. The
* result is by no means securely random, but should be random enough so not the same objects get selected over
* and over again.
*/
public static <T> List<T> selectRandom(int count, Collection<T> collection) {
ArrayList<T> result = new ArrayList<>(count);
if (collection.size() <= count) {
result.addAll(collection);
} else {
double collectionRest = collection.size();
double resultRest = count;
int skipMax = (int) Math.ceil(collectionRest / resultRest);
int skip = RANDOM.nextInt(skipMax);
for (T item : collection) {
collectionRest--;
if (skip > 0) {
skip--;
} else {
result.add(item);
resultRest--;
if (resultRest == 0) {
break;
}
skipMax = (int) Math.ceil(collectionRest / resultRest);
skip = RANDOM.nextInt(skipMax);
}
}
}
return result;
}
public static <T> T selectRandom(Collection<T> collection) {
int index = RANDOM.nextInt(collection.size());
for (T item : collection) {
if (index == 0) {
return item;
}
index--;
}
throw new IllegalArgumentException("Empty collection? Size: " + collection.size());
}
}

142
core/src/main/java/ch/dissem/bitmessage/utils/ConversationService.java
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@ -1,142 +0,0 @@
/*
* Copyright 2017 Christian Basler
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package ch.dissem.bitmessage.utils;
import ch.dissem.bitmessage.entity.Plaintext;
import ch.dissem.bitmessage.entity.valueobject.InventoryVector;
import ch.dissem.bitmessage.ports.MessageRepository;
import java.util.*;
import java.util.Collections;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import static java.util.regex.Pattern.CASE_INSENSITIVE;
/**
* Service that helps with conversations.
*/
public class ConversationService {
private final MessageRepository messageRepository;
private final Pattern SUBJECT_PREFIX = Pattern.compile("^(re|fwd?):", CASE_INSENSITIVE);
public ConversationService(MessageRepository messageRepository) {
this.messageRepository = messageRepository;
}
/**
* Retrieve the whole conversation from one single message. If the message isn't part
* of a conversation, a singleton list containing the given message is returned. Otherwise
* it's the same as {@link #getConversation(UUID)}
*
* @param message
* @return a list of messages that belong to the same conversation.
*/
public List<Plaintext> getConversation(Plaintext message) {
if (message.getConversationId() == null) {
return Collections.singletonList(message);
}
return getConversation(message.getConversationId());
}
private LinkedList<Plaintext> sorted(Collection<Plaintext> collection) {
LinkedList<Plaintext> result = new LinkedList<>(collection);
Collections.sort(result, new Comparator<Plaintext>() {
@Override
public int compare(Plaintext o1, Plaintext o2) {
//noinspection NumberEquality - if both are null (if both are the same, it's a bonus)
if (o1.getReceived() == o2.getReceived()) {
return 0;
}
if (o1.getReceived() == null) {
return -1;
}
if (o2.getReceived() == null) {
return 1;
}
return -o1.getReceived().compareTo(o2.getReceived());
}
});
return result;
}
public List<Plaintext> getConversation(UUID conversationId) {
LinkedList<Plaintext> messages = sorted(messageRepository.getConversation(conversationId));
Map<InventoryVector, Plaintext> map = new HashMap<>(messages.size());
for (Plaintext message : messages) {
if (message.getInventoryVector() != null) {
map.put(message.getInventoryVector(), message);
}
}
LinkedList<Plaintext> result = new LinkedList<>();
while (!messages.isEmpty()) {
Plaintext last = messages.poll();
int pos = lastParentPosition(last, result);
result.add(pos, last);
addAncestors(last, result, messages, map);
}
return result;
}
public String getSubject(List<Plaintext> conversation) {
if (conversation.isEmpty()) {
return null;
}
// TODO: this has room for improvement
String subject = conversation.get(0).getSubject();
Matcher matcher = SUBJECT_PREFIX.matcher(subject);
if (matcher.find()) {
return subject.substring(matcher.end()).trim();
}
return subject.trim();
}
private int lastParentPosition(Plaintext child, LinkedList<Plaintext> messages) {
Iterator<Plaintext> plaintextIterator = messages.descendingIterator();
int i = 0;
while (plaintextIterator.hasNext()) {
Plaintext next = plaintextIterator.next();
if (isParent(next, child)) {
break;
}
i++;
}
return messages.size() - i;
}
private boolean isParent(Plaintext item, Plaintext child) {
for (InventoryVector parentId : child.getParents()) {
if (parentId.equals(item.getInventoryVector())) {
return true;
}
}
return false;
}
private void addAncestors(Plaintext message, LinkedList<Plaintext> result, LinkedList<Plaintext> messages, Map<InventoryVector, Plaintext> map) {
for (InventoryVector parentKey : message.getParents()) {
Plaintext parent = map.remove(parentKey);
if (parent != null) {
messages.remove(parent);
result.addFirst(parent);
addAncestors(parent, result, messages, map);
}
}
}
}

48
core/src/main/java/ch/dissem/bitmessage/utils/DebugUtils.java
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@ -1,48 +0,0 @@
/*
* Copyright 2015 Christian Basler
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package ch.dissem.bitmessage.utils;
import ch.dissem.bitmessage.entity.ObjectMessage;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.Map;
public class DebugUtils {
private final static Logger LOG = LoggerFactory.getLogger(DebugUtils.class);
public static void saveToFile(ObjectMessage objectMessage) {
try {
File f = new File(System.getProperty("user.home") + "/jabit.error/" + objectMessage.getInventoryVector() + ".inv");
f.createNewFile();
objectMessage.write(new FileOutputStream(f));
} catch (IOException e) {
LOG.debug(e.getMessage(), e);
}
}
public static <K> void inc(Map<K, Integer> map, K key) {
if (map.containsKey(key)) {
map.put(key, map.get(key) + 1);
} else {
map.put(key, 1);
}
}
}

152
core/src/main/java/ch/dissem/bitmessage/utils/Decode.java
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@ -1,152 +0,0 @@
/*
* Copyright 2015 Christian Basler
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package ch.dissem.bitmessage.utils;
import java.io.IOException;
import java.io.InputStream;
import java.nio.ByteBuffer;
import static ch.dissem.bitmessage.utils.AccessCounter.inc;
/**
* This class handles decoding simple types from byte stream, according to
* https://bitmessage.org/wiki/Protocol_specification#Common_structures
*/
public class Decode {
public static byte[] shortVarBytes(InputStream in, AccessCounter counter) throws IOException {
int length = uint16(in, counter);
return bytes(in, length, counter);
}
public static byte[] varBytes(InputStream in) throws IOException {
return varBytes(in, null);
}
public static byte[] varBytes(InputStream in, AccessCounter counter) throws IOException {
int length = (int) varInt(in, counter);
return bytes(in, length, counter);
}
public static byte[] bytes(InputStream in, int count) throws IOException {
return bytes(in, count, null);
}
public static byte[] bytes(InputStream in, int count, AccessCounter counter) throws IOException {
byte[] result = new byte[count];
int off = 0;
while (off < count) {
int read = in.read(result, off, count - off);
if (read < 0) {
throw new IOException("Unexpected end of stream, wanted to read " + count + " bytes but only got " + off);
}
off += read;
}
inc(counter, count);
return result;
}
public static long[] varIntList(InputStream in) throws IOException {
int length = (int) varInt(in);
long[] result = new long[length];
for (int i = 0; i < length; i++) {
result[i] = varInt(in);
}
return result;
}
public static long varInt(InputStream in) throws IOException {
return varInt(in, null);
}
public static long varInt(InputStream in, AccessCounter counter) throws IOException {
int first = in.read();
inc(counter);
switch (first) {
case 0xfd:
return uint16(in, counter);
case 0xfe:
return uint32(in, counter);
case 0xff:
return int64(in, counter);
default:
return first;
}
}
public static int uint8(InputStream in) throws IOException {
return in.read();
}
public static int uint16(InputStream in) throws IOException {
return uint16(in, null);
}
public static int uint16(InputStream in, AccessCounter counter) throws IOException {
inc(counter, 2);
return in.read() << 8 | in.read();
}
public static long uint32(InputStream in) throws IOException {
return uint32(in, null);
}
public static long uint32(InputStream in, AccessCounter counter) throws IOException {
inc(counter, 4);
return in.read() << 24 | in.read() << 16 | in.read() << 8 | in.read();
}
public static long uint32(ByteBuffer in) {
return u(in.get()) << 24 | u(in.get()) << 16 | u(in.get()) << 8 | u(in.get());
}
public static int int32(InputStream in) throws IOException {
return int32(in, null);
}
public static int int32(InputStream in, AccessCounter counter) throws IOException {
inc(counter, 4);
return ByteBuffer.wrap(bytes(in, 4)).getInt();
}
public static long int64(InputStream in) throws IOException {
return int64(in, null);
}
public static long int64(InputStream in, AccessCounter counter) throws IOException {
inc(counter, 8);
return ByteBuffer.wrap(bytes(in, 8)).getLong();
}
public static String varString(InputStream in) throws IOException {
return varString(in, null);
}
public static String varString(InputStream in, AccessCounter counter) throws IOException {
int length = (int) varInt(in, counter);
// technically, it says the length in characters, but I think this one might be correct
// otherwise it will get complicated, as we'll need to read UTF-8 char by char...
return new String(bytes(in, length, counter), "utf-8");
}
/**
* Returns the given byte as if it were unsigned.
*/
private static int u(byte b) {
return b & 0xFF;
}
}

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core/src/main/java/ch/dissem/bitmessage/utils/Encode.java
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/*
* Copyright 2015 Christian Basler
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package ch.dissem.bitmessage.utils;
import ch.dissem.bitmessage.entity.Streamable;
import ch.dissem.bitmessage.exception.ApplicationException;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.io.UnsupportedEncodingException;
import java.nio.Buffer;
import java.nio.ByteBuffer;
import static ch.dissem.bitmessage.utils.AccessCounter.inc;
/**
* This class handles encoding simple types from byte stream, according to
* https://bitmessage.org/wiki/Protocol_specification#Common_structures
*/
public class Encode {
public static void varIntList(long[] values, OutputStream stream) throws IOException {
varInt(values.length, stream);
for (long value : values) {
varInt(value, stream);
}
}
public static void varIntList(long[] values, ByteBuffer buffer) {
varInt(values.length, buffer);
for (long value : values) {
varInt(value, buffer);
}
}
public static void varInt(long value, OutputStream stream) throws IOException {
varInt(value, stream, null);
}
public static void varInt(long value, ByteBuffer buffer) {
if (value < 0) {
// This is due to the fact that Java doesn't really support unsigned values.
// Please be aware that this might be an error due to a smaller negative value being cast to long.
// Normally, negative values shouldn't occur within the protocol, and longs large enough for being
// recognized as negatives aren't realistic.
buffer.put((byte) 0xff);
buffer.putLong(value);
} else if (value < 0xfd) {
buffer.put((byte) value);
} else if (value <= 0xffffL) {
buffer.put((byte) 0xfd);
buffer.putShort((short) value);
} else if (value <= 0xffffffffL) {
buffer.put((byte) 0xfe);
buffer.putInt((int) value);
} else {
buffer.put((byte) 0xff);
buffer.putLong(value);
}
}
public static byte[] varInt(long value) {
ByteBuffer buffer = ByteBuffer.allocate(9);
varInt(value, buffer);
buffer.flip();
return Bytes.truncate(buffer.array(), buffer.limit());
}
public static void varInt(long value, OutputStream stream, AccessCounter counter) throws IOException {
ByteBuffer buffer = ByteBuffer.allocate(9);
varInt(value, buffer);
buffer.flip();
stream.write(buffer.array(), 0, buffer.limit());
inc(counter, buffer.limit());
}
public static void int8(long value, OutputStream stream) throws IOException {
int8(value, stream, null);
}
public static void int8(long value, OutputStream stream, AccessCounter counter) throws IOException {
stream.write((int) value);
inc(counter);
}
public static void int16(long value, OutputStream stream) throws IOException {
int16(value, stream, null);
}
public static void int16(long value, OutputStream stream, AccessCounter counter) throws IOException {
stream.write(ByteBuffer.allocate(2).putShort((short) value).array());
inc(counter, 2);
}
public static void int16(long value, ByteBuffer buffer) {
buffer.putShort((short) value);
}
public static void int32(long value, OutputStream stream) throws IOException {
int32(value, stream, null);
}
public static void int32(long value, OutputStream stream, AccessCounter counter) throws IOException {
stream.write(ByteBuffer.allocate(4).putInt((int) value).array());
inc(counter, 4);
}
public static void int32(long value, ByteBuffer buffer) {
buffer.putInt((int) value);
}
public static void int64(long value, OutputStream stream) throws IOException {
int64(value, stream, null);
}
public static void int64(long value, OutputStream stream, AccessCounter counter) throws IOException {
stream.write(ByteBuffer.allocate(8).putLong(value).array());
inc(counter, 8);
}
public static void int64(long value, ByteBuffer buffer) {
buffer.putLong(value);
}
public static void varString(String value, OutputStream out) throws IOException {
byte[] bytes = value.getBytes("utf-8");
// Technically, it says the length in characters, but I think this one might be correct.
// It doesn't really matter, as only ASCII characters are being used.
// see also Decode#varString()
varInt(bytes.length, out);
out.write(bytes);
}
public static void varString(String value, ByteBuffer buffer) {
try {
byte[] bytes = value.getBytes("utf-8");
// Technically, it says the length in characters, but I think this one might be correct.
// It doesn't really matter, as only ASCII characters are being used.
// see also Decode#varString()
buffer.put(varInt(bytes.length));
buffer.put(bytes);
} catch (UnsupportedEncodingException e) {
throw new ApplicationException(e);
}
}
public static void varBytes(byte[] data, OutputStream out) throws IOException {
varInt(data.length, out);
out.write(data);
}
public static void varBytes(byte[] data, ByteBuffer buffer) {
varInt(data.length, buffer);
buffer.put(data);
}
/**
* Serializes a {@link Streamable} object and returns the byte array.
*
* @param streamable the object to be serialized
* @return an array of bytes representing the given streamable object.
*/
public static byte[] bytes(Streamable streamable) {
if (streamable == null) return null;
ByteArrayOutputStream stream = new ByteArrayOutputStream();
try {
streamable.write(stream);
} catch (IOException e) {
throw new ApplicationException(e);
}
return stream.toByteArray();
}
/**
* @param streamable the object to be serialized
* @param padding the result will be padded such that its length is a multiple of <em>padding</em>
* @return the bytes of the given {@link Streamable} object, 0-padded such that the final length is x*padding.
*/
public static byte[] bytes(Streamable streamable, int padding) {
ByteArrayOutputStream stream = new ByteArrayOutputStream();
try {
streamable.write(stream);
} catch (IOException e) {
throw new ApplicationException(e);
}
int offset = padding - stream.size() % padding;
int length = stream.size() + offset;
byte[] result = new byte[length];
stream.write(result, offset, stream.size());
return result;
}
}

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core/src/main/java/ch/dissem/bitmessage/utils/Numbers.java
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@ -1,10 +0,0 @@
package ch.dissem.bitmessage.utils;
/**
* @author Christian Basler
*/
public class Numbers {
public static long max(long a, long b) {
return a > b ? a : b;
}
}

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core/src/main/java/ch/dissem/bitmessage/utils/Property.java
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/*
* Copyright 2015 Christian Basler
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package ch.dissem.bitmessage.utils;
import java.util.Arrays;
import java.util.Objects;
/**
* Some property that has a name, a value and/or other properties. This can be used for any purpose, but is for now
* used to contain different status information. It is by default displayed in some JSON inspired human readable
* notation, but you might only want to rely on the 'human readable' part.
* <p>
* If you need a real JSON representation, please add a method <code>toJson()</code>.
* </p>
*/
public class Property {
private String name;
private Object value;
private Property[] properties;
public Property(String name, Object value, Property... properties) {
this.name = name;
this.value = value;
this.properties = properties;
}
public String getName() {
return name;
}
public Object getValue() {
return value;
}
/**
* Returns the property if available or <code>null</code> otherwise.
* Subproperties can be requested by submitting the sequence of properties.
*/
public Property getProperty(String... name) {
if (name == null || name.length == 0) return null;
for (Property p : properties) {
if (Objects.equals(name[0], p.name)) {
if (name.length == 1)
return p;
else
return p.getProperty(Arrays.copyOfRange(name, 1, name.length));
}
}
return null;
}
public Property[] getProperties() {
return properties;
}
@Override
public String toString() {
return toString("");
}
private String toString(String indentation) {
StringBuilder result = new StringBuilder();
result.append(indentation).append(name).append(": ");
if (value != null || properties.length == 0) {
result.append(value);
}
if (properties.length > 0) {
result.append("{\n");
for (Property property : properties) {
result.append(property.toString(indentation + " ")).append('\n');
}
result.append(indentation).append("}");
}
return result.toString();
}
}

59
core/src/main/java/ch/dissem/bitmessage/utils/SqlStrings.java
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/*
* Copyright 2016 Christian Basler
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package ch.dissem.bitmessage.utils;
import ch.dissem.bitmessage.entity.payload.ObjectType;
import static ch.dissem.bitmessage.utils.Strings.hex;
public class SqlStrings {
public static StringBuilder join(long... objects) {
StringBuilder streamList = new StringBuilder();
for (int i = 0; i < objects.length; i++) {
if (i > 0) streamList.append(", ");
streamList.append(objects[i]);
}
return streamList;
}
public static StringBuilder join(byte[]... objects) {
StringBuilder streamList = new StringBuilder();
for (int i = 0; i < objects.length; i++) {
if (i > 0) streamList.append(", ");
streamList.append(hex(objects[i]));
}
return streamList;
}
public static StringBuilder join(ObjectType... types) {
StringBuilder streamList = new StringBuilder();
for (int i = 0; i < types.length; i++) {
if (i > 0) streamList.append(", ");
streamList.append(types[i].getNumber());
}
return streamList;
}
public static StringBuilder join(Enum... types) {
StringBuilder streamList = new StringBuilder();
for (int i = 0; i < types.length; i++) {
if (i > 0) streamList.append(", ");
streamList.append('\'').append(types[i].name()).append('\'');
}
return streamList;
}
}

44
core/src/main/java/ch/dissem/bitmessage/utils/TTL.java
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@ -1,44 +0,0 @@
package ch.dissem.bitmessage.utils;
import static ch.dissem.bitmessage.utils.UnixTime.DAY;
/**
* Stores times to live in seconds for different object types. Usually this shouldn't be messed with, but for tests
* it might be a good idea to reduce it to a minimum, and on mobile clients you might want to optimize it as well.
*
* @author Christian Basler
*/
public class TTL {
private static long msg = 2 * DAY;
private static long getpubkey = 2 * DAY;
private static long pubkey = 28 * DAY;
public static long msg() {
return msg;
}
public static void msg(long msg) {
TTL.msg = validate(msg);
}
public static long getpubkey() {
return getpubkey;
}
public static void getpubkey(long getpubkey) {
TTL.getpubkey = validate(getpubkey);
}
public static long pubkey() {
return pubkey;
}
public static void pubkey(long pubkey) {
TTL.pubkey = validate(pubkey);
}
private static long validate(long ttl) {
if (ttl < 0 || ttl > 28 * DAY) throw new IllegalArgumentException("TTL must be between 0 seconds and 28 days");
return ttl;
}
}

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core/src/main/java/ch/dissem/bitmessage/utils/ThreadFactoryBuilder.java
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/*
* Copyright 2016 Christian Basler
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package ch.dissem.bitmessage.utils;
import java.util.concurrent.ThreadFactory;
import java.util.concurrent.atomic.AtomicInteger;
public class ThreadFactoryBuilder {
private final String namePrefix;
private int prio = Thread.NORM_PRIORITY;
private boolean daemon = false;
private ThreadFactoryBuilder(String pool) {
this.namePrefix = pool + "-thread-";
}
public static ThreadFactoryBuilder pool(String name) {
return new ThreadFactoryBuilder(name);
}
public ThreadFactoryBuilder lowPrio() {
prio = Thread.MIN_PRIORITY;
return this;
}
public ThreadFactoryBuilder daemon() {
daemon = true;
return this;
}
public ThreadFactory build() {
SecurityManager s = System.getSecurityManager();
final ThreadGroup group = (s != null) ? s.getThreadGroup() :
Thread.currentThread().getThreadGroup();
return new ThreadFactory() {
private final AtomicInteger threadNumber = new AtomicInteger(1);
@Override
public Thread newThread(Runnable r) {
Thread t = new Thread(group, r,
namePrefix + threadNumber.getAndIncrement(),
0);
t.setPriority(prio);
t.setDaemon(daemon);
return t;
}
};
}
}

52
core/src/main/java/ch/dissem/bitmessage/utils/UnixTime.java
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/*
* Copyright 2015 Christian Basler
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package ch.dissem.bitmessage.utils;
/**
* A simple utility class that simplifies using the second based time used in Bitmessage.
*/
public class UnixTime {
/**
* Length of a minute in seconds, intended for use with {@link #now(long)}.
*/
public static final int MINUTE = 60;
/**
* Length of an hour in seconds, intended for use with {@link #now(long)}.
*/
public static final long HOUR = 60 * MINUTE;
/**
* Length of a day in seconds, intended for use with {@link #now(long)}.
*/
public static final long DAY = 24 * HOUR;
/**
* @return the time in second based Unix time ({@link System#currentTimeMillis()}/1000)
*/
public static long now() {
return System.currentTimeMillis() / 1000;
}
/**
* Same as {@link #now()} + shiftSeconds, but might be more readable.
*
* @param shiftSeconds number of seconds from now we're interested in
* @return the Unix time in shiftSeconds seconds / shiftSeconds seconds ago
*/
public static long now(long shiftSeconds) {
return (System.currentTimeMillis() / 1000) + shiftSeconds;
}
}

509
core/src/main/kotlin/ch/dissem/bitmessage/BitmessageContext.kt Normal file
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/*
* Copyright 2015 Christian Basler
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package ch.dissem.bitmessage
import ch.dissem.bitmessage.InternalContext.Companion.NETWORK_EXTRA_BYTES
import ch.dissem.bitmessage.InternalContext.Companion.NETWORK_NONCE_TRIALS_PER_BYTE
import ch.dissem.bitmessage.entity.BitmessageAddress
import ch.dissem.bitmessage.entity.CustomMessage
import ch.dissem.bitmessage.entity.MessagePayload
import ch.dissem.bitmessage.entity.Plaintext
import ch.dissem.bitmessage.entity.Plaintext.Status.DRAFT
import ch.dissem.bitmessage.entity.Plaintext.Type.BROADCAST
import ch.dissem.bitmessage.entity.Plaintext.Type.MSG
import ch.dissem.bitmessage.entity.payload.Broadcast
import ch.dissem.bitmessage.entity.payload.ObjectType
import ch.dissem.bitmessage.entity.payload.Pubkey.Feature
import ch.dissem.bitmessage.entity.valueobject.PrivateKey
import ch.dissem.bitmessage.exception.DecryptionFailedException
import ch.dissem.bitmessage.factory.Factory
import ch.dissem.bitmessage.ports.*
import ch.dissem.bitmessage.utils.Property
import ch.dissem.bitmessage.utils.UnixTime.HOUR
import ch.dissem.bitmessage.utils.UnixTime.MINUTE
import org.slf4j.LoggerFactory
import java.net.InetAddress
import java.util.concurrent.CancellationException
import java.util.concurrent.ExecutionException
import kotlin.properties.Delegates
/**
*
* Use this class if you want to create a Bitmessage client.
* You'll need the Builder to create a BitmessageContext, and set the following properties:
*
* * addressRepo
* * inventory
* * nodeRegistry
* * networkHandler
* * messageRepo
* * streams
*
*
* The default implementations in the different module builds can be used.
*
* The port defaults to 8444 (the default Bitmessage port)
*/
class BitmessageContext(
cryptography: Cryptography,
inventory: Inventory,
nodeRegistry: NodeRegistry,
networkHandler: NetworkHandler,
addressRepository: AddressRepository,
messageRepository: MessageRepository,
proofOfWorkRepository: ProofOfWorkRepository,
proofOfWorkEngine: ProofOfWorkEngine = MultiThreadedPOWEngine(),
customCommandHandler: CustomCommandHandler = object : CustomCommandHandler {
override fun handle(request: CustomMessage): MessagePayload? {
BitmessageContext.LOG.debug("Received custom request, but no custom command handler configured.")
return null
}
},
listener: Listener,
labeler: Labeler = DefaultLabeler(),
userAgent: String? = null,
port: Int = 8444,
connectionTTL: Long = 30 * MINUTE,
connectionLimit: Int = 150,
sendPubkeyOnIdentityCreation: Boolean = true,
doMissingProofOfWorkDelayInSeconds: Int = 30
) {
private constructor(builder: BitmessageContext.Builder) : this(
builder.cryptography,
builder.inventory,
builder.nodeRegistry,
builder.networkHandler,
builder.addressRepo,
builder.messageRepo,
builder.proofOfWorkRepository,
builder.proofOfWorkEngine ?: MultiThreadedPOWEngine(),
builder.customCommandHandler ?: object : CustomCommandHandler {
override fun handle(request: CustomMessage): MessagePayload? {
BitmessageContext.LOG.debug("Received custom request, but no custom command handler configured.")
return null
}
},
builder.listener,
builder.labeler ?: DefaultLabeler(),
builder.userAgent,
builder.port,
builder.connectionTTL,
builder.connectionLimit,
builder.sendPubkeyOnIdentityCreation,
builder.doMissingProofOfWorkDelay
)
private val sendPubkeyOnIdentityCreation: Boolean
/**
* The [InternalContext] - normally you wouldn't need it,
* unless you are doing something crazy with the protocol.
*/
val internals: InternalContext
@JvmName("internals") get
val labeler: Labeler
@JvmName("labeler") get
val addresses: AddressRepository
@JvmName("addresses") get
val messages: MessageRepository
@JvmName("messages") get
fun createIdentity(shorter: Boolean, vararg features: Feature): BitmessageAddress {
val identity = BitmessageAddress(PrivateKey(
shorter,
internals.streams[0],
NETWORK_NONCE_TRIALS_PER_BYTE,
NETWORK_EXTRA_BYTES,
*features
))
internals.addressRepository.save(identity)
if (sendPubkeyOnIdentityCreation) {
internals.sendPubkey(identity, identity.stream)
}
return identity
}
fun joinChan(passphrase: String, address: String): BitmessageAddress {
val chan = BitmessageAddress.chan(address, passphrase)
chan.alias = passphrase
internals.addressRepository.save(chan)
return chan
}
fun createChan(passphrase: String): BitmessageAddress {
// FIXME: hardcoded stream number
val chan = BitmessageAddress.chan(1, passphrase)
internals.addressRepository.save(chan)
return chan
}
fun createDeterministicAddresses(
passphrase: String, numberOfAddresses: Int, version: Long, stream: Long, shorter: Boolean): List<BitmessageAddress> {
val result = BitmessageAddress.deterministic(
passphrase, numberOfAddresses, version, stream, shorter)
for (i in result.indices) {
val address = result[i]
address.alias = "deterministic (" + (i + 1) + ")"
internals.addressRepository.save(address)
}
return result
}
fun broadcast(from: BitmessageAddress, subject: String, message: String) {
send(Plaintext(
type = BROADCAST,
from = from,
subject = subject,
body = message,
status = DRAFT
))
}
fun send(from: BitmessageAddress, to: BitmessageAddress, subject: String, message: String) {
if (from.privateKey == null) {
throw IllegalArgumentException("'From' must be an identity, i.e. have a private key.")
}
send(Plaintext(
type = MSG,
from = from,
to = to,
subject = subject,
body = message
))
}
fun send(msg: Plaintext) {
if (msg.from.privateKey == null) {
throw IllegalArgumentException("'From' must be an identity, i.e. have a private key.")
}
labeler.markAsSending(msg)
val to = msg.to
if (to != null) {
if (to.pubkey == null) {
LOG.info("Public key is missing from recipient. Requesting.")
internals.requestPubkey(to)
}
if (to.pubkey == null) {
internals.messageRepository.save(msg)
}
}
if (to == null || to.pubkey != null) {
LOG.info("Sending message.")
internals.messageRepository.save(msg)
if (msg.type == MSG) {
internals.send(msg)
} else {
internals.send(
msg.from,
to,
Factory.getBroadcast(msg),
msg.ttl
)
}
}
}
fun startup() {
internals.networkHandler.start()
}
fun shutdown() {
internals.networkHandler.stop()
}
/**
* @param host a trusted node that must be reliable (it's used for every synchronization)
* *
* @param port of the trusted host, default is 8444
* *
* @param timeoutInSeconds synchronization should end no later than about 5 seconds after the timeout elapsed, even
* * if not all objects were fetched
* *
* @param wait waits for the synchronization thread to finish
*/
fun synchronize(host: InetAddress, port: Int, timeoutInSeconds: Long, wait: Boolean) {
val future = internals.networkHandler.synchronize(host, port, timeoutInSeconds)
if (wait) {
try {
future.get()
} catch (e: InterruptedException) {
LOG.info("Thread was interrupted. Trying to shut down synchronization and returning.")
future.cancel(true)
} catch (e: CancellationException) {
LOG.debug(e.message, e)
} catch (e: ExecutionException) {
LOG.debug(e.message, e)
}
}
}
/**
* Send a custom message to a specific node (that should implement handling for this message type) and returns
* the response, which in turn is expected to be a [CustomMessage].
* @param server the node's address
* *
* @param port the node's port
* *
* @param request the request
* *
* @return the response
*/
fun send(server: InetAddress, port: Int, request: CustomMessage): CustomMessage {
return internals.networkHandler.send(server, port, request)
}
/**
* Removes expired objects from the inventory. You should call this method regularly,
* e.g. daily and on each shutdown.
*/
fun cleanup() {
internals.inventory.cleanup()
}
/**
* Sends messages again whose time to live expired without being acknowledged. (And whose
* recipient is expected to send acknowledgements.
*
*
* You should call this method regularly, but be aware of the following:
*
* * As messages might be sent, POW will be done. It is therefore not advised to
* call it on shutdown.
* * It shouldn't be called right after startup, as it's possible the missing
* acknowledgement was sent while the client was offline.
* * Other than that, the call isn't expensive as long as there is no message
* to send, so it might be a good idea to just call it every few minutes.
*
*/
fun resendUnacknowledgedMessages() {
internals.resendUnacknowledged()
}
val isRunning: Boolean
get() = internals.networkHandler.isRunning
fun addContact(contact: BitmessageAddress) {
internals.addressRepository.save(contact)
if (contact.pubkey == null) {
// If it already existed, the saved contact might have the public key
if (internals.addressRepository.getAddress(contact.address)!!.pubkey == null) {
internals.requestPubkey(contact)
}
}
}
fun addSubscribtion(address: BitmessageAddress) {
address.isSubscribed = true
internals.addressRepository.save(address)
tryToFindBroadcastsForAddress(address)
}
private fun tryToFindBroadcastsForAddress(address: BitmessageAddress) {
for (objectMessage in internals.inventory.getObjects(address.stream, Broadcast.getVersion(address), ObjectType.BROADCAST)) {
try {
val broadcast = objectMessage.payload as Broadcast
broadcast.decrypt(address)
// This decrypts it twice, but on the other hand it doesn't try to decrypt the objects with
// other subscriptions and the interface stays as simple as possible.
internals.networkListener.receive(objectMessage)
} catch (ignore: DecryptionFailedException) {
} catch (e: Exception) {
LOG.debug(e.message, e)
}
}
}
fun status(): Property {
return Property("status",
Property("user agent", internals.userAgent),
internals.networkHandler.getNetworkStatus(),
Property("unacknowledged", internals.messageRepository.findMessagesToResend().size)
)
}
interface Listener {
fun receive(plaintext: Plaintext)
/**
* A message listener that needs a [BitmessageContext], i.e. for implementing some sort of chat bot.
*/
interface WithContext : Listener {
fun setContext(ctx: BitmessageContext)
}
}
class Builder {
internal var port = 8444
internal var inventory by Delegates.notNull<Inventory>()
internal var nodeRegistry by Delegates.notNull<NodeRegistry>()
internal var networkHandler by Delegates.notNull<NetworkHandler>()
internal var addressRepo by Delegates.notNull<AddressRepository>()
internal var messageRepo by Delegates.notNull<MessageRepository>()
internal var proofOfWorkRepository by Delegates.notNull<ProofOfWorkRepository>()
internal var proofOfWorkEngine: ProofOfWorkEngine? = null
internal var cryptography by Delegates.notNull<Cryptography>()
internal var customCommandHandler: CustomCommandHandler? = null
internal var labeler: Labeler? = null
internal var userAgent: String? = null
internal var listener by Delegates.notNull<Listener>()
internal var connectionLimit = 150
internal var connectionTTL = 30 * MINUTE
internal var sendPubkeyOnIdentityCreation = true
internal var doMissingProofOfWorkDelay = 30
fun port(port: Int): Builder {
this.port = port
return this
}
fun inventory(inventory: Inventory): Builder {
this.inventory = inventory
return this
}
fun nodeRegistry(nodeRegistry: NodeRegistry): Builder {
this.nodeRegistry = nodeRegistry
return this
}
fun networkHandler(networkHandler: NetworkHandler): Builder {
this.networkHandler = networkHandler
return this
}
fun addressRepo(addressRepo: AddressRepository): Builder {
this.addressRepo = addressRepo
return this
}
fun messageRepo(messageRepo: MessageRepository): Builder {
this.messageRepo = messageRepo
return this
}
fun powRepo(proofOfWorkRepository: ProofOfWorkRepository): Builder {
this.proofOfWorkRepository = proofOfWorkRepository
return this
}
fun cryptography(cryptography: Cryptography): Builder {
this.cryptography = cryptography
return this
}
fun customCommandHandler(handler: CustomCommandHandler): Builder {
this.customCommandHandler = handler
return this
}
fun proofOfWorkEngine(proofOfWorkEngine: ProofOfWorkEngine): Builder {
this.proofOfWorkEngine = proofOfWorkEngine
return this
}
fun labeler(labeler: Labeler): Builder {
this.labeler = labeler
return this
}
fun listener(listener: Listener): Builder {
this.listener = listener
return this
}
@JvmName("kotlinListener")
fun listener(listener: (Plaintext) -> Unit): Builder {
this.listener = object : Listener {
override fun receive(plaintext: Plaintext) {
listener.invoke(plaintext)
}
}
return this
}
fun connectionLimit(connectionLimit: Int): Builder {
this.connectionLimit = connectionLimit
return this
}
fun connectionTTL(hours: Int): Builder {
this.connectionTTL = hours * HOUR
return this
}
fun doMissingProofOfWorkDelay(seconds: Int) {
this.doMissingProofOfWorkDelay = seconds
}
/**
* By default a client will send the public key when an identity is being created. On weaker devices
* this behaviour might not be desirable.
*/
fun doNotSendPubkeyOnIdentityCreation(): Builder {
this.sendPubkeyOnIdentityCreation = false
return this
}
fun build(): BitmessageContext {
return BitmessageContext(this)
}
}
init {
this.labeler = labeler
this.internals = InternalContext(
cryptography,
inventory,
nodeRegistry,
networkHandler,
addressRepository,
messageRepository,
proofOfWorkRepository,
proofOfWorkEngine,
customCommandHandler,
listener,
labeler,
userAgent?.let { "/$it/Jabit:$version/" } ?: "/Jabit:$version/",
port,
connectionTTL,
connectionLimit
)
this.addresses = addressRepository
this.messages = messageRepository
this.sendPubkeyOnIdentityCreation = sendPubkeyOnIdentityCreation
(listener as? Listener.WithContext)?.setContext(this)
internals.proofOfWorkService.doMissingProofOfWork(doMissingProofOfWorkDelayInSeconds * 1000L)
}
companion object {
@JvmField val CURRENT_VERSION = 3
private val LOG = LoggerFactory.getLogger(BitmessageContext::class.java)
val version: String by lazy {
BitmessageContext::class.java.getResource("/version")?.readText() ?: "local build"
}
@JvmStatic get
}
}

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/*
* Copyright 2017 Christian Basler
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package ch.dissem.bitmessage
import ch.dissem.bitmessage.entity.BitmessageAddress
import ch.dissem.bitmessage.entity.ObjectMessage
import ch.dissem.bitmessage.entity.Plaintext
import ch.dissem.bitmessage.entity.Plaintext.Status.PUBKEY_REQUESTED
import ch.dissem.bitmessage.entity.payload.*
import ch.dissem.bitmessage.entity.valueobject.InventoryVector
import ch.dissem.bitmessage.exception.DecryptionFailedException
import ch.dissem.bitmessage.ports.Labeler
import ch.dissem.bitmessage.ports.NetworkHandler
import ch.dissem.bitmessage.utils.Strings.hex
import org.slf4j.LoggerFactory
import java.util.*
open class DefaultMessageListener(
private val labeler: Labeler,
private val listener: BitmessageContext.Listener
) : NetworkHandler.MessageListener, InternalContext.ContextHolder {
private lateinit var ctx: InternalContext
override fun setContext(context: InternalContext) {
ctx = context
}
override fun receive(objectMessage: ObjectMessage) {
val payload = objectMessage.payload
when (payload.type) {
ObjectType.GET_PUBKEY -> {
receive(objectMessage, payload as GetPubkey)
}
ObjectType.PUBKEY -> {
receive(payload as Pubkey)
}
ObjectType.MSG -> {
receive(objectMessage, payload as Msg)
}
ObjectType.BROADCAST -> {
receive(objectMessage, payload as Broadcast)
}
null -> {
if (payload is GenericPayload) {
receive(payload)
}
}
}
}
protected fun receive(objectMessage: ObjectMessage, getPubkey: GetPubkey) {
val identity = ctx.addressRepository.findIdentity(getPubkey.ripeTag)
if (identity != null && identity.privateKey != null && !identity.isChan) {
LOG.info("Got pubkey request for identity " + identity)
// FIXME: only send pubkey if it wasn't sent in the last TTL.pubkey() days
ctx.sendPubkey(identity, objectMessage.stream)
}
}
protected fun receive(pubkey: Pubkey) {
try {
if (pubkey is V4Pubkey) {
ctx.addressRepository.findContact(pubkey.tag)?.let {
if (it.pubkey == null) {
pubkey.decrypt(it.publicDecryptionKey)
updatePubkey(it, pubkey)
}
}
} else {
ctx.addressRepository.findContact(pubkey.ripe)?.let {
if (it.pubkey == null) {
updatePubkey(it, pubkey)
}
}
}
} catch (_: DecryptionFailedException) {
}
}
private fun updatePubkey(address: BitmessageAddress, pubkey: Pubkey) {
address.pubkey = pubkey
LOG.info("Got pubkey for contact " + address)
ctx.addressRepository.save(address)
val messages = ctx.messageRepository.findMessages(PUBKEY_REQUESTED, address)
LOG.info("Sending " + messages.size + " messages for contact " + address)
for (msg in messages) {
ctx.labeler.markAsSending(msg)
ctx.messageRepository.save(msg)
ctx.send(msg)
}
}
protected fun receive(objectMessage: ObjectMessage, msg: Msg) {
for (identity in ctx.addressRepository.getIdentities()) {
try {
msg.decrypt(identity.privateKey!!.privateEncryptionKey)
val plaintext = msg.plaintext!!
plaintext.to = identity
if (!objectMessage.isSignatureValid(plaintext.from.pubkey!!)) {
LOG.warn("Msg with IV " + objectMessage.inventoryVector + " was successfully decrypted, but signature check failed. Ignoring.")
} else {
receive(objectMessage.inventoryVector, plaintext)
}
break
} catch (_: DecryptionFailedException) {
}
}
}
protected fun receive(ack: GenericPayload) {
if (ack.data.size == Msg.ACK_LENGTH) {
ctx.messageRepository.getMessageForAck(ack.data)?.let {
ctx.labeler.markAsAcknowledged(it)
ctx.messageRepository.save(it)
} ?: LOG.debug("Message not found for ack ${hex(ack.data)}")
}
}
protected fun receive(objectMessage: ObjectMessage, broadcast: Broadcast) {
val tag = (broadcast as? V5Broadcast)?.tag
ctx.addressRepository.getSubscriptions(broadcast.version)
.filter { tag == null || Arrays.equals(tag, it.tag) }
.forEach {
try {
broadcast.decrypt(it.publicDecryptionKey)
if (!objectMessage.isSignatureValid(broadcast.plaintext!!.from.pubkey!!)) {
LOG.warn("Broadcast with IV " + objectMessage.inventoryVector + " was successfully decrypted, but signature check failed. Ignoring.")
} else {
receive(objectMessage.inventoryVector, broadcast.plaintext!!)
}
} catch (_: DecryptionFailedException) {
}
}
}
protected fun receive(iv: InventoryVector, msg: Plaintext) {
val contact = ctx.addressRepository.getAddress(msg.from.address)
if (contact != null && contact.pubkey == null) {
updatePubkey(contact, msg.from.pubkey!!)
}
msg.inventoryVector = iv
labeler.setLabels(msg)
ctx.messageRepository.save(msg)
listener.receive(msg)
if (msg.type == Plaintext.Type.MSG && msg.to!!.has(Pubkey.Feature.DOES_ACK)) {
msg.ackMessage?.let {
ctx.inventory.storeObject(it)
ctx.networkHandler.offer(it.inventoryVector)
} ?: LOG.debug("ack message expected")
}
}
companion object {
private val LOG = LoggerFactory.getLogger(DefaultMessageListener::class.java)
}
}

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/*
* Copyright 2017 Christian Basler
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package ch.dissem.bitmessage
import ch.dissem.bitmessage.entity.BitmessageAddress
import ch.dissem.bitmessage.entity.Encrypted
import ch.dissem.bitmessage.entity.ObjectMessage
import ch.dissem.bitmessage.entity.Plaintext
import ch.dissem.bitmessage.entity.payload.*
import ch.dissem.bitmessage.ports.*
import ch.dissem.bitmessage.utils.Singleton
import ch.dissem.bitmessage.utils.TTL
import ch.dissem.bitmessage.utils.UnixTime
import org.slf4j.LoggerFactory
import java.util.*
import java.util.concurrent.Executors
/**
* The internal context should normally only be used for port implementations. If you need it in your client
* implementation, you're either doing something wrong, something very weird, or the BitmessageContext should
* get extended.
*
*
* On the other hand, if you need the BitmessageContext in a port implementation, the same thing might apply.
*
*/
class InternalContext(
val cryptography: Cryptography,
val inventory: ch.dissem.bitmessage.ports.Inventory,
val nodeRegistry: NodeRegistry,
val networkHandler: NetworkHandler,
val addressRepository: AddressRepository,
val messageRepository: ch.dissem.bitmessage.ports.MessageRepository,
val proofOfWorkRepository: ProofOfWorkRepository,
val proofOfWorkEngine: ProofOfWorkEngine,
val customCommandHandler: CustomCommandHandler,
listener: BitmessageContext.Listener,
val labeler: Labeler,
val userAgent: String,
val port: Int,
val connectionTTL: Long,
val connectionLimit: Int
) {
private val threadPool = Executors.newCachedThreadPool()
val proofOfWorkService: ProofOfWorkService = ProofOfWorkService()
val networkListener: NetworkHandler.MessageListener = DefaultMessageListener(labeler, listener)
val clientNonce: Long = cryptography.randomNonce()
private val _streams = TreeSet<Long>()
val streams: LongArray
get() = _streams.toLongArray()
init {
Singleton.initialize(cryptography)
// TODO: streams of new identities and subscriptions should also be added. This works only after a restart.
addressRepository.getIdentities().mapTo(_streams) { it.stream }
addressRepository.getSubscriptions().mapTo(_streams) { it.stream }
if (_streams.isEmpty()) {
_streams.add(1L)
}
init(cryptography, inventory, nodeRegistry, networkHandler, addressRepository, messageRepository,
proofOfWorkRepository, proofOfWorkService, proofOfWorkEngine, customCommandHandler, labeler,
networkListener)
}
private fun init(vararg objects: Any) {
objects.filter { it is ContextHolder }.forEach { (it as ContextHolder).setContext(this) }
}
fun send(plaintext: Plaintext) {
if (plaintext.ackMessage != null) {
val expires = UnixTime.now + plaintext.ttl
LOG.info("Expires at " + expires)
proofOfWorkService.doProofOfWorkWithAck(plaintext, expires)
} else {
send(plaintext.from, plaintext.to, Msg(plaintext), plaintext.ttl)
}
}
fun send(from: BitmessageAddress, to: BitmessageAddress?, payload: ObjectPayload,
timeToLive: Long) {
val recipient = to ?: from
val expires = UnixTime.now + timeToLive
LOG.info("Expires at " + expires)
val objectMessage = ObjectMessage(
stream = recipient.stream,
expiresTime = expires,
payload = payload
)
if (objectMessage.isSigned) {
objectMessage.sign(
from.privateKey ?: throw IllegalArgumentException("The given sending address is no identity")
)
}
if (payload is Broadcast) {
payload.encrypt()
} else if (payload is Encrypted) {
objectMessage.encrypt(
recipient.pubkey ?: throw IllegalArgumentException("The public key for the recipient isn't available")
)
}
proofOfWorkService.doProofOfWork(to, objectMessage)
}
fun sendPubkey(identity: BitmessageAddress, targetStream: Long) {
val expires = UnixTime.now + TTL.pubkey
LOG.info("Expires at " + expires)
val payload = identity.pubkey ?: throw IllegalArgumentException("The given address is no identity")
val response = ObjectMessage(
expiresTime = expires,
stream = targetStream,
payload = payload
)
response.sign(
identity.privateKey ?: throw IllegalArgumentException("The given address is no identity")
)
response.encrypt(cryptography.createPublicKey(identity.publicDecryptionKey))
// TODO: remember that the pubkey is just about to be sent, and on which stream!
proofOfWorkService.doProofOfWork(response)
}
/**
* Be aware that if the pubkey already exists in the inventory, the metods will not request it and the callback
* for freshly received pubkeys will not be called. Instead the pubkey is added to the contact and stored on DB.
*/
fun requestPubkey(contact: BitmessageAddress) {
threadPool.execute {
val stored = addressRepository.getAddress(contact.address)
tryToFindMatchingPubkey(contact)
if (contact.pubkey != null) {
if (stored != null) {
stored.pubkey = contact.pubkey
addressRepository.save(stored)
} else {
addressRepository.save(contact)
}
return@execute
}
if (stored == null) {
addressRepository.save(contact)
}
val expires = UnixTime.now + TTL.getpubkey
LOG.info("Expires at $expires")
val request = ObjectMessage(
stream = contact.stream,
expiresTime = expires,
payload = GetPubkey(contact)
)
proofOfWorkService.doProofOfWork(request)
}
}
private fun tryToFindMatchingPubkey(address: BitmessageAddress) {
addressRepository.getAddress(address.address)?.let {
address.alias = it.alias
address.isSubscribed = it.isSubscribed
}
for (objectMessage in inventory.getObjects(address.stream, address.version, ObjectType.PUBKEY)) {
try {
val pubkey = objectMessage.payload as Pubkey
if (address.version == 4L) {
val v4Pubkey = pubkey as V4Pubkey
if (Arrays.equals(address.tag, v4Pubkey.tag)) {
v4Pubkey.decrypt(address.publicDecryptionKey)
if (objectMessage.isSignatureValid(v4Pubkey)) {
address.pubkey = v4Pubkey
addressRepository.save(address)
break
} else {
LOG.info("Found pubkey for $address but signature is invalid")
}
}
} else {
if (Arrays.equals(pubkey.ripe, address.ripe)) {
address.pubkey = pubkey
addressRepository.save(address)
break
}
}
} catch (e: Exception) {
LOG.debug(e.message, e)
}
}
}
fun resendUnacknowledged() {
val messages = messageRepository.findMessagesToResend()
for (message in messages) {
send(message)
messageRepository.save(message)
}
}
interface ContextHolder {
fun setContext(context: InternalContext)
}
companion object {
private val LOG = LoggerFactory.getLogger(InternalContext::class.java)
@JvmField val NETWORK_NONCE_TRIALS_PER_BYTE: Long = 1000
@JvmField val NETWORK_EXTRA_BYTES: Long = 1000
}
}

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/*
* Copyright 2017 Christian Basler
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package ch.dissem.bitmessage
import ch.dissem.bitmessage.InternalContext.Companion.NETWORK_EXTRA_BYTES
import ch.dissem.bitmessage.InternalContext.Companion.NETWORK_NONCE_TRIALS_PER_BYTE
import ch.dissem.bitmessage.entity.*
import ch.dissem.bitmessage.entity.payload.Msg
import ch.dissem.bitmessage.ports.ProofOfWorkEngine
import ch.dissem.bitmessage.ports.ProofOfWorkRepository.Item
import org.slf4j.LoggerFactory
import java.util.*
/**
* @author Christian Basler
*/
class ProofOfWorkService : ProofOfWorkEngine.Callback, InternalContext.ContextHolder {
private lateinit var ctx: InternalContext
private val cryptography by lazy { ctx.cryptography }
private val powRepo by lazy { ctx.proofOfWorkRepository }
private val messageRepo by lazy { ctx.messageRepository }
override fun setContext(context: InternalContext) {
ctx = context
}
fun doMissingProofOfWork(delayInMilliseconds: Long) {
val items = powRepo.getItems()
if (items.isEmpty()) return
// Wait for 30 seconds, to let the application start up before putting heavy load on the CPU
Timer().schedule(object : TimerTask() {
override fun run() {
LOG.info("Doing POW for " + items.size + " tasks.")
for (initialHash in items) {
val (objectMessage, nonceTrialsPerByte, extraBytes) = powRepo.getItem(initialHash)
cryptography.doProofOfWork(objectMessage, nonceTrialsPerByte, extraBytes,
this@ProofOfWorkService)
}
}
}, delayInMilliseconds)
}
fun doProofOfWork(objectMessage: ObjectMessage) {
doProofOfWork(null, objectMessage)
}
fun doProofOfWork(recipient: BitmessageAddress?, objectMessage: ObjectMessage) {
val pubkey = recipient?.pubkey
val nonceTrialsPerByte = pubkey?.nonceTrialsPerByte ?: NETWORK_NONCE_TRIALS_PER_BYTE
val extraBytes = pubkey?.extraBytes ?: NETWORK_EXTRA_BYTES
powRepo.putObject(objectMessage, nonceTrialsPerByte, extraBytes)
if (objectMessage.payload is PlaintextHolder) {
objectMessage.payload.plaintext?.let {
it.initialHash = cryptography.getInitialHash(objectMessage)
messageRepo.save(it)
} ?: LOG.error("PlaintextHolder without Plaintext shouldn't make it to the POW")
}
cryptography.doProofOfWork(objectMessage, nonceTrialsPerByte, extraBytes, this)
}
fun doProofOfWorkWithAck(plaintext: Plaintext, expirationTime: Long) {
val ack = plaintext.ackMessage!!
messageRepo.save(plaintext)
val item = Item(ack, NETWORK_NONCE_TRIALS_PER_BYTE, NETWORK_EXTRA_BYTES,
expirationTime, plaintext)
powRepo.putObject(item)
cryptography.doProofOfWork(ack, NETWORK_NONCE_TRIALS_PER_BYTE, NETWORK_EXTRA_BYTES, this)
}
override fun onNonceCalculated(initialHash: ByteArray, nonce: ByteArray) {
val (objectMessage, _, _, expirationTime, message) = powRepo.getItem(initialHash)
if (message == null) {
objectMessage.nonce = nonce
messageRepo.getMessage(initialHash)?.let {
it.inventoryVector = objectMessage.inventoryVector
it.updateNextTry()
ctx.labeler.markAsSent(it)
messageRepo.save(it)
}
ctx.inventory.storeObject(objectMessage)
ctx.networkHandler.offer(objectMessage.inventoryVector)
} else {
message.ackMessage!!.nonce = nonce
val newObjectMessage = ObjectMessage.Builder()
.stream(message.stream)
.expiresTime(expirationTime!!)
.payload(Msg(message))
.build()
if (newObjectMessage.isSigned) {
newObjectMessage.sign(message.from.privateKey!!)
}
if (newObjectMessage.payload is Encrypted) {
newObjectMessage.encrypt(message.to!!.pubkey!!)
}
doProofOfWork(message.to, newObjectMessage)
}
powRepo.removeObject(initialHash)
}
companion object {
private val LOG = LoggerFactory.getLogger(ProofOfWorkService::class.java)
}
}

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/*
* Copyright 2017 Christian Basler
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package ch.dissem.bitmessage.constants
/**
* Some network constants
*/
object Network {
@JvmField val NETWORK_MAGIC_NUMBER = 8
@JvmField val HEADER_SIZE = 24
@JvmField val MAX_PAYLOAD_SIZE = 1600003
@JvmField val MAX_MESSAGE_SIZE = HEADER_SIZE + MAX_PAYLOAD_SIZE
}

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/*
* Copyright 2017 Christian Basler
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package ch.dissem.bitmessage.entity
import ch.dissem.bitmessage.entity.valueobject.NetworkAddress
import ch.dissem.bitmessage.utils.Encode
import java.io.OutputStream
import java.nio.ByteBuffer
/**
* The 'addr' command holds a list of known active Bitmessage nodes.
*/
data class Addr constructor(val addresses: List<NetworkAddress>) : MessagePayload {
override val command: MessagePayload.Command = MessagePayload.Command.ADDR
override fun write(out: OutputStream) {
Encode.varInt(addresses.size, out)
for (address in addresses) {
address.write(out)
}
}
override fun write(buffer: ByteBuffer) {
Encode.varInt(addresses.size, buffer)
for (address in addresses) {
address.write(buffer)
}
}
}

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/*
* Copyright 2017 Christian Basler
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package ch.dissem.bitmessage.entity
import ch.dissem.bitmessage.entity.payload.Pubkey
import ch.dissem.bitmessage.entity.payload.Pubkey.Feature
import ch.dissem.bitmessage.entity.payload.V4Pubkey
import ch.dissem.bitmessage.entity.valueobject.PrivateKey
import ch.dissem.bitmessage.utils.AccessCounter
import ch.dissem.bitmessage.utils.Base58
import ch.dissem.bitmessage.utils.Bytes
import ch.dissem.bitmessage.utils.Decode.bytes
import ch.dissem.bitmessage.utils.Decode.varInt
import ch.dissem.bitmessage.utils.Encode
import ch.dissem.bitmessage.utils.Singleton.cryptography
import java.io.ByteArrayInputStream
import java.io.ByteArrayOutputStream
import java.io.Serializable
import java.util.*
/**
* A Bitmessage address. Can be a user's private address, an address string without public keys or a recipient's address
* holding private keys.
*/
class BitmessageAddress : Serializable {
val version: Long
val stream: Long
val ripe: ByteArray
val tag: ByteArray?
/**
* The private key used to decrypt Pubkey objects (for v4 addresses) and broadcasts. It's easier to just create
* it regardless of address version.
*/
val publicDecryptionKey: ByteArray
val address: String
var privateKey: PrivateKey? = null
private set
var pubkey: Pubkey? = null
set(pubkey) {
if (pubkey != null) {
if (pubkey is V4Pubkey) {
if (!Arrays.equals(tag, pubkey.tag))
throw IllegalArgumentException("Pubkey has incompatible tag")
}
if (!Arrays.equals(ripe, pubkey.ripe))
throw IllegalArgumentException("Pubkey has incompatible ripe")
field = pubkey
}
}
var alias: String? = null
var isSubscribed: Boolean = false
var isChan: Boolean = false
internal constructor(version: Long, stream: Long, ripe: ByteArray) {
this.version = version
this.stream = stream
this.ripe = ripe
val os = ByteArrayOutputStream()
Encode.varInt(version, os)
Encode.varInt(stream, os)
if (version < 4) {
val checksum = cryptography().sha512(os.toByteArray(), ripe)
this.tag = null
this.publicDecryptionKey = Arrays.copyOfRange(checksum, 0, 32)
} else {
// for tag and decryption key, the checksum has to be created with 0x00 padding
val checksum = cryptography().doubleSha512(os.toByteArray(), ripe)
this.tag = Arrays.copyOfRange(checksum, 32, 64)
this.publicDecryptionKey = Arrays.copyOfRange(checksum, 0, 32)
}
// but for the address and its checksum they need to be stripped
val offset = Bytes.numberOfLeadingZeros(ripe)
os.write(ripe, offset, ripe.size - offset)
val checksum = cryptography().doubleSha512(os.toByteArray())
os.write(checksum, 0, 4)
this.address = "BM-" + Base58.encode(os.toByteArray())
}
constructor(publicKey: Pubkey) : this(publicKey.version, publicKey.stream, publicKey.ripe) {
this.pubkey = publicKey
}
constructor(address: String, passphrase: String) : this(address) {
val key = PrivateKey(this, passphrase)
if (!Arrays.equals(ripe, key.pubkey.ripe)) {
throw IllegalArgumentException("Wrong address or passphrase")
}
this.privateKey = key
this.pubkey = key.pubkey
}
constructor(privateKey: PrivateKey) : this(privateKey.pubkey) {
this.privateKey = privateKey
}
constructor(address: String) {
this.address = address
val bytes = Base58.decode(address.substring(3))
val `in` = ByteArrayInputStream(bytes)
val counter = AccessCounter()
this.version = varInt(`in`, counter)
this.stream = varInt(`in`, counter)
this.ripe = Bytes.expand(bytes(`in`, bytes.size - counter.length() - 4), 20)
// test checksum
var checksum = cryptography().doubleSha512(bytes, bytes.size - 4)
val expectedChecksum = bytes(`in`, 4)
for (i in 0..3) {
if (expectedChecksum[i] != checksum[i])
throw IllegalArgumentException("Checksum of address failed")
}
if (version < 4) {
checksum = cryptography().sha512(Arrays.copyOfRange(bytes, 0, counter.length()), ripe)
this.tag = null
this.publicDecryptionKey = Arrays.copyOfRange(checksum, 0, 32)
} else {
checksum = cryptography().doubleSha512(Arrays.copyOfRange(bytes, 0, counter.length()), ripe)
this.tag = Arrays.copyOfRange(checksum, 32, 64)
this.publicDecryptionKey = Arrays.copyOfRange(checksum, 0, 32)
}
}
override fun toString(): String {
return alias ?: address
}
override fun equals(other: Any?): Boolean {
if (this === other) return true
if (other !is BitmessageAddress) return false
return version == other.version &&
stream == other.stream &&
Arrays.equals(ripe, other.ripe)
}
override fun hashCode(): Int {
return Arrays.hashCode(ripe)
}
fun has(feature: Feature?): Boolean {
return feature?.isActive(pubkey?.behaviorBitfield ?: 0) ?: false
}
companion object {
@JvmStatic fun chan(address: String, passphrase: String): BitmessageAddress {
val result = BitmessageAddress(address, passphrase)
result.isChan = true
return result
}
@JvmStatic fun chan(stream: Long, passphrase: String): BitmessageAddress {
val privateKey = PrivateKey(Pubkey.LATEST_VERSION, stream, passphrase)
val result = BitmessageAddress(privateKey)
result.isChan = true
return result
}
@JvmStatic fun deterministic(passphrase: String, numberOfAddresses: Int,
version: Long, stream: Long, shorter: Boolean): List<BitmessageAddress> {
val result = ArrayList<BitmessageAddress>(numberOfAddresses)
val privateKeys = PrivateKey.deterministic(passphrase, numberOfAddresses, version, stream, shorter)
for (pk in privateKeys) {
result.add(BitmessageAddress(pk))
}
return result
}
@JvmStatic fun calculateTag(version: Long, stream: Long, ripe: ByteArray): ByteArray {
val out = ByteArrayOutputStream()
Encode.varInt(version, out)
Encode.varInt(stream, out)
out.write(ripe)
return Arrays.copyOfRange(cryptography().doubleSha512(out.toByteArray()), 32, 64)
}
}
}

84
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@ -0,0 +1,84 @@
/*
* Copyright 2017 Christian Basler
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package ch.dissem.bitmessage.entity
import ch.dissem.bitmessage.exception.ApplicationException
import ch.dissem.bitmessage.utils.AccessCounter
import ch.dissem.bitmessage.utils.Decode.bytes
import ch.dissem.bitmessage.utils.Decode.varString
import ch.dissem.bitmessage.utils.Encode
import java.io.ByteArrayOutputStream
import java.io.InputStream
import java.io.OutputStream
import java.nio.ByteBuffer
/**
* @author Christian Basler
*/
open class CustomMessage(val customCommand: String, private val data: ByteArray? = null) : MessagePayload {
override val command: MessagePayload.Command = MessagePayload.Command.CUSTOM
val isError: Boolean
fun getData(): ByteArray {
if (data != null) {
return data
} else {
val out = ByteArrayOutputStream()
write(out)
return out.toByteArray()
}
}
override fun write(out: OutputStream) {
if (data != null) {
Encode.varString(customCommand, out)
out.write(data)
} else {
throw ApplicationException("Tried to write custom message without data. "
+ "Programmer: did you forget to override #write()?")
}
}
override fun write(buffer: ByteBuffer) {
if (data != null) {
Encode.varString(customCommand, buffer)
buffer.put(data)
} else {
throw ApplicationException("Tried to write custom message without data. "
+ "Programmer: did you forget to override #write()?")
}
}
companion object {
val COMMAND_ERROR = "ERROR"
fun read(`in`: InputStream, length: Int): CustomMessage {
val counter = AccessCounter()
return CustomMessage(varString(`in`, counter), bytes(`in`, length - counter.length()))
}
fun error(message: String): CustomMessage {
return CustomMessage(COMMAND_ERROR, message.toByteArray(charset("UTF-8")))
}
}
init {
this.isError = COMMAND_ERROR == customCommand
}
}

17
core/src/main/java/ch/dissem/bitmessage/entity/Encrypted.java → core/src/main/kotlin/ch/dissem/bitmessage/entity/Encrypted.kt
View File

@ -1,5 +1,5 @@
/* /*
* Copyright 2015 Christian Basler * Copyright 2017 Christian Basler
* *
* Licensed under the Apache License, Version 2.0 (the "License"); * Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License. * you may not use this file except in compliance with the License.
@ -14,19 +14,18 @@
* limitations under the License. * limitations under the License.
*/ */
package ch.dissem.bitmessage.entity; package ch.dissem.bitmessage.entity
import ch.dissem.bitmessage.exception.DecryptionFailedException; import ch.dissem.bitmessage.exception.DecryptionFailedException
import java.io.IOException;
/** /**
* Used for objects that have encrypted content * Used for objects that have encrypted content
*/ */
public interface Encrypted { interface Encrypted {
void encrypt(byte[] publicKey) throws IOException; fun encrypt(publicKey: ByteArray)
void decrypt(byte[] privateKey) throws IOException, DecryptionFailedException; @Throws(DecryptionFailedException::class)
fun decrypt(privateKey: ByteArray)
boolean isDecrypted(); val isDecrypted: Boolean
} }

48
core/src/main/kotlin/ch/dissem/bitmessage/entity/GetData.kt Normal file
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@ -0,0 +1,48 @@
/*
* Copyright 2017 Christian Basler
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package ch.dissem.bitmessage.entity
import ch.dissem.bitmessage.entity.valueobject.InventoryVector
import ch.dissem.bitmessage.utils.Encode
import java.io.OutputStream
import java.nio.ByteBuffer
/**
* The 'getdata' command is used to request objects from a node.
*/
class GetData constructor(var inventory: List<InventoryVector>) : MessagePayload {
override val command: MessagePayload.Command = MessagePayload.Command.GETDATA
override fun write(out: OutputStream) {
Encode.varInt(inventory.size, out)
for (iv in inventory) {
iv.write(out)
}
}
override fun write(buffer: ByteBuffer) {
Encode.varInt(inventory.size, buffer)
for (iv in inventory) {
iv.write(buffer)
}
}
companion object {
@JvmField val MAX_INVENTORY_SIZE = 50000
}
}

44
core/src/main/kotlin/ch/dissem/bitmessage/entity/Inv.kt Normal file
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@ -0,0 +1,44 @@
/*
* Copyright 2017 Christian Basler
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package ch.dissem.bitmessage.entity
import ch.dissem.bitmessage.entity.valueobject.InventoryVector
import ch.dissem.bitmessage.utils.Encode
import java.io.OutputStream
import java.nio.ByteBuffer
/**
* The 'inv' command holds up to 50000 inventory vectors, i.e. hashes of inventory items.
*/
class Inv constructor(val inventory: List<InventoryVector>) : MessagePayload {
override val command: MessagePayload.Command = MessagePayload.Command.INV
override fun write(out: OutputStream) {
Encode.varInt(inventory.size, out)
for (iv in inventory) {
iv.write(out)
}
}
override fun write(buffer: ByteBuffer) {
Encode.varInt(inventory.size, buffer)
for (iv in inventory) {
iv.write(buffer)
}
}
}

10
core/src/main/java/ch/dissem/bitmessage/entity/MessagePayload.java → core/src/main/kotlin/ch/dissem/bitmessage/entity/MessagePayload.kt
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@ -1,5 +1,5 @@
/* /*
* Copyright 2015 Christian Basler * Copyright 2017 Christian Basler
* *
* Licensed under the Apache License, Version 2.0 (the "License"); * Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License. * you may not use this file except in compliance with the License.
@ -14,15 +14,15 @@
* limitations under the License. * limitations under the License.
*/ */
package ch.dissem.bitmessage.entity; package ch.dissem.bitmessage.entity
/** /**
* A command can hold a network message payload * A command can hold a network message payload
*/ */
public interface MessagePayload extends Streamable { interface MessagePayload : Streamable {
Command getCommand(); val command: Command
enum Command { enum class Command {
VERSION, VERACK, ADDR, INV, GETDATA, OBJECT, CUSTOM VERSION, VERACK, ADDR, INV, GETDATA, OBJECT, CUSTOM
} }
} }

125
core/src/main/kotlin/ch/dissem/bitmessage/entity/NetworkMessage.kt Normal file
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@ -0,0 +1,125 @@
/*
* Copyright 2017 Christian Basler
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package ch.dissem.bitmessage.entity
import ch.dissem.bitmessage.utils.Encode
import ch.dissem.bitmessage.utils.Singleton.cryptography
import java.io.IOException
import java.io.OutputStream
import java.nio.ByteBuffer
/**
* A network message is exchanged between two nodes.
*/
data class NetworkMessage(
/**
* The actual data, a message or an object. Not to be confused with objectPayload.
*/
val payload: MessagePayload
) : Streamable {
/**
* First 4 bytes of sha512(payload)
*/
private fun getChecksum(bytes: ByteArray): ByteArray {
val d = cryptography().sha512(bytes)
return byteArrayOf(d[0], d[1], d[2], d[3])
}
override fun write(out: OutputStream) {
// magic
Encode.int32(MAGIC, out)
// ASCII string identifying the packet content, NULL padded (non-NULL padding results in packet rejected)
val command = payload.command.name.toLowerCase()
out.write(command.toByteArray(charset("ASCII")))
for (i in command.length..11) {
out.write(0x0)
}
val payloadBytes = Encode.bytes(payload)
// Length of payload in number of bytes. Because of other restrictions, there is no reason why this length would
// ever be larger than 1600003 bytes. Some clients include a sanity-check to avoid processing messages which are
// larger than this.
Encode.int32(payloadBytes.size, out)
// checksum
out.write(getChecksum(payloadBytes))
// message payload
out.write(payloadBytes)
}
/**
* A more efficient implementation of the write method, writing header data to the provided buffer and returning
* a new buffer containing the payload.
* @param headerBuffer where the header data is written to (24 bytes)
* *
* @return a buffer containing the payload, ready to be read.
*/
fun writeHeaderAndGetPayloadBuffer(headerBuffer: ByteBuffer): ByteBuffer {
return ByteBuffer.wrap(writeHeader(headerBuffer))
}
/**
* For improved memory efficiency, you should use [.writeHeaderAndGetPayloadBuffer]
* and write the header buffer as well as the returned payload buffer into the channel.
* @param buffer where everything gets written to. Needs to be large enough for the whole message
* * to be written.
*/
override fun write(buffer: ByteBuffer) {
val payloadBytes = writeHeader(buffer)
buffer.put(payloadBytes)
}
private fun writeHeader(out: ByteBuffer): ByteArray {
// magic
Encode.int32(MAGIC, out)
// ASCII string identifying the packet content, NULL padded (non-NULL padding results in packet rejected)
val command = payload.command.name.toLowerCase()
out.put(command.toByteArray(charset("ASCII")))
for (i in command.length..11) {
out.put(0.toByte())
}
val payloadBytes = Encode.bytes(payload)
// Length of payload in number of bytes. Because of other restrictions, there is no reason why this length would
// ever be larger than 1600003 bytes. Some clients include a sanity-check to avoid processing messages which are
// larger than this.
Encode.int32(payloadBytes.size, out)
// checksum
out.put(getChecksum(payloadBytes))
// message payload
return payloadBytes
}
companion object {
/**
* Magic value indicating message origin network, and used to seek to next message when stream state is unknown
*/
val MAGIC = 0xE9BEB4D9.toInt()
val MAGIC_BYTES = ByteBuffer.allocate(4).putInt(MAGIC).array()
}
}

228
core/src/main/kotlin/ch/dissem/bitmessage/entity/ObjectMessage.kt Normal file
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@ -0,0 +1,228 @@
/*
* Copyright 2017 Christian Basler
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package ch.dissem.bitmessage.entity
import ch.dissem.bitmessage.entity.payload.ObjectPayload
import ch.dissem.bitmessage.entity.payload.ObjectType
import ch.dissem.bitmessage.entity.payload.Pubkey
import ch.dissem.bitmessage.entity.valueobject.InventoryVector
import ch.dissem.bitmessage.entity.valueobject.PrivateKey
import ch.dissem.bitmessage.exception.ApplicationException
import ch.dissem.bitmessage.exception.DecryptionFailedException
import ch.dissem.bitmessage.utils.Bytes
import ch.dissem.bitmessage.utils.Encode
import ch.dissem.bitmessage.utils.Singleton.cryptography
import java.io.ByteArrayOutputStream
import java.io.IOException
import java.io.OutputStream
import java.nio.ByteBuffer
import java.util.*
/**
* The 'object' command sends an object that is shared throughout the network.
*/
data class ObjectMessage(
var nonce: ByteArray? = null,
val expiresTime: Long,
val payload: ObjectPayload,
val type: Long,
/**
* The object's version
*/
val version: Long,
val stream: Long
) : MessagePayload {
override val command: MessagePayload.Command = MessagePayload.Command.OBJECT
constructor(
nonce: ByteArray? = null,
expiresTime: Long,
payload: ObjectPayload,
stream: Long
) : this(
nonce,
expiresTime,
payload,
payload.type?.number ?: throw IllegalArgumentException("payload must have type defined"),
payload.version,
stream
)
val inventoryVector: InventoryVector
get() {
return InventoryVector(Bytes.truncate(cryptography().doubleSha512(
nonce ?: throw IllegalStateException("nonce must be set"),
payloadBytesWithoutNonce
), 32))
}
private val isEncrypted: Boolean
get() = payload is Encrypted && !payload.isDecrypted
val isSigned: Boolean
get() = payload.isSigned
private val bytesToSign: ByteArray
get() {
try {
val out = ByteArrayOutputStream()
writeHeaderWithoutNonce(out)
payload.writeBytesToSign(out)
return out.toByteArray()
} catch (e: IOException) {
throw ApplicationException(e)
}
}
fun sign(key: PrivateKey) {
if (payload.isSigned) {
payload.signature = cryptography().getSignature(bytesToSign, key)
}
}
@Throws(DecryptionFailedException::class)
fun decrypt(key: PrivateKey) {
if (payload is Encrypted) {
payload.decrypt(key.privateEncryptionKey)
}
}
@Throws(DecryptionFailedException::class)
fun decrypt(privateEncryptionKey: ByteArray) {
if (payload is Encrypted) {
payload.decrypt(privateEncryptionKey)
}
}
fun encrypt(publicEncryptionKey: ByteArray) {
if (payload is Encrypted) {
payload.encrypt(publicEncryptionKey)
}
}
fun encrypt(publicKey: Pubkey) {
try {
if (payload is Encrypted) {
payload.encrypt(publicKey.encryptionKey)
}
} catch (e: IOException) {
throw ApplicationException(e)
}
}
fun isSignatureValid(pubkey: Pubkey): Boolean {
if (isEncrypted) throw IllegalStateException("Payload must be decrypted first")
return cryptography().isSignatureValid(bytesToSign, payload.signature ?: return false, pubkey)
}
override fun write(out: OutputStream) {
out.write(nonce ?: ByteArray(8))
out.write(payloadBytesWithoutNonce)
}
override fun write(buffer: ByteBuffer) {
buffer.put(nonce ?: ByteArray(8))
buffer.put(payloadBytesWithoutNonce)
}
private fun writeHeaderWithoutNonce(out: OutputStream) {
Encode.int64(expiresTime, out)
Encode.int32(type, out)
Encode.varInt(version, out)
Encode.varInt(stream, out)
}
val payloadBytesWithoutNonce: ByteArray by lazy {
val out = ByteArrayOutputStream()
writeHeaderWithoutNonce(out)
payload.write(out)
out.toByteArray()
}
class Builder {
private var nonce: ByteArray? = null
private var expiresTime: Long = 0
private var objectType: Long? = null
private var streamNumber: Long = 0
private var payload: ObjectPayload? = null
fun nonce(nonce: ByteArray): Builder {
this.nonce = nonce
return this
}
fun expiresTime(expiresTime: Long): Builder {
this.expiresTime = expiresTime
return this
}
fun objectType(objectType: Long): Builder {
this.objectType = objectType
return this
}
fun objectType(objectType: ObjectType): Builder {
this.objectType = objectType.number
return this
}
fun stream(streamNumber: Long): Builder {
this.streamNumber = streamNumber
return this
}
fun payload(payload: ObjectPayload): Builder {
this.payload = payload
if (this.objectType == null)
this.objectType = payload.type?.number
return this
}
fun build(): ObjectMessage {
return ObjectMessage(
nonce = nonce,
expiresTime = expiresTime,
type = objectType!!,
version = payload!!.version,
stream = if (streamNumber > 0) streamNumber else payload!!.stream,
payload = payload!!
)
}
}
override fun equals(other: Any?): Boolean {
if (this === other) return true
if (other !is ObjectMessage) return false
return expiresTime == other.expiresTime &&
type == other.type &&
version == other.version &&
stream == other.stream &&
payload == other.payload
}
override fun hashCode(): Int {
var result = Arrays.hashCode(nonce)
result = 31 * result + (expiresTime xor expiresTime.ushr(32)).toInt()
result = 31 * result + (type xor type.ushr(32)).toInt()
result = 31 * result + (version xor version.ushr(32)).toInt()
result = 31 * result + (stream xor stream.ushr(32)).toInt()
result = 31 * result + (payload.hashCode())
return result
}
}

753
core/src/main/kotlin/ch/dissem/bitmessage/entity/Plaintext.kt Normal file
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@ -0,0 +1,753 @@
/*
* Copyright 2017 Christian Basler
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package ch.dissem.bitmessage.entity
import ch.dissem.bitmessage.entity.Plaintext.Encoding.*
import ch.dissem.bitmessage.entity.Plaintext.Type.MSG
import ch.dissem.bitmessage.entity.payload.Msg
import ch.dissem.bitmessage.entity.payload.Pubkey.Feature
import ch.dissem.bitmessage.entity.valueobject.ExtendedEncoding
import ch.dissem.bitmessage.entity.valueobject.InventoryVector
import ch.dissem.bitmessage.entity.valueobject.Label
import ch.dissem.bitmessage.entity.valueobject.extended.Attachment
import ch.dissem.bitmessage.entity.valueobject.extended.Message
import ch.dissem.bitmessage.exception.ApplicationException
import ch.dissem.bitmessage.factory.ExtendedEncodingFactory
import ch.dissem.bitmessage.factory.Factory
import ch.dissem.bitmessage.utils.*
import ch.dissem.bitmessage.utils.Singleton.cryptography
import java.io.*
import java.nio.ByteBuffer
import java.util.*
import java.util.Collections
import kotlin.collections.HashSet
private fun message(encoding: Plaintext.Encoding, subject: String, body: String): ByteArray = when (encoding) {
SIMPLE -> "Subject:$subject\nBody:$body".toByteArray()
EXTENDED -> Message.Builder().subject(subject).body(body).build().zip()
TRIVIAL -> (subject + body).toByteArray()
IGNORE -> ByteArray(0)
}
private fun ackData(type: Plaintext.Type, ackData: ByteArray?): ByteArray? {
if (ackData != null) {
return ackData
} else if (type == MSG) {
return cryptography().randomBytes(Msg.ACK_LENGTH)
} else {
return null
}
}
/**
* A plaintext message before encryption or after decryption.
*/
class Plaintext private constructor(
val type: Type,
val from: BitmessageAddress,
to: BitmessageAddress?,
val encodingCode: Long,
val message: ByteArray,
val ackData: ByteArray?,
ackMessage: Lazy<ObjectMessage?> = lazy { Factory.createAck(from, ackData, ttl) },
val conversationId: UUID = UUID.randomUUID(),
var inventoryVector: InventoryVector? = null,
var signature: ByteArray? = null,
sent: Long? = null,
val received: Long? = null,
var initialHash: ByteArray? = null,
ttl: Long = TTL.msg,
val labels: MutableSet<Label> = HashSet(),
status: Status
) : Streamable {
var id: Any? = null
set(id) {
if (this.id != null) throw IllegalStateException("ID already set")
field = id
}
var to: BitmessageAddress? = to
set(to) {
if (to == null) {
return
}
if (this.to != null) {
if (this.to!!.version != 0L)
throw IllegalStateException("Correct address already set")
if (!Arrays.equals(this.to!!.ripe, to.ripe)) {
throw IllegalArgumentException("RIPEs don't match")
}
}
field = to
}
val stream: Long
get() = to?.stream ?: from.stream
val extendedData: ExtendedEncoding? by lazy {
if (encodingCode == EXTENDED.code) {
ExtendedEncodingFactory.unzip(message)
} else {
null
}
}
val ackMessage: ObjectMessage? by ackMessage
var status: Status = status
set(status) {
if (status != Status.RECEIVED && sent == null && status != Status.DRAFT) {
sent = UnixTime.now
}
field = status
}
val encoding: Encoding? by lazy { Encoding.fromCode(encodingCode) }
var sent: Long? = sent
private set
var retries: Int = 0
private set
var nextTry: Long? = null
private set
val ttl: Long = ttl
@JvmName("getTTL") get
constructor(
type: Type,
from: BitmessageAddress,
to: BitmessageAddress?,
encoding: Encoding,
message: ByteArray,
ackData: ByteArray? = null,
conversationId: UUID = UUID.randomUUID(),
inventoryVector: InventoryVector? = null,
signature: ByteArray? = null,
received: Long? = null,
initialHash: ByteArray? = null,
ttl: Long = TTL.msg,
labels: MutableSet<Label> = HashSet(),
status: Status
) : this(
type = type,
from = from,
to = to,
encodingCode = encoding.code,
message = message,
ackData = ackData(type, ackData),
conversationId = conversationId,
inventoryVector = inventoryVector,
signature = signature,
received = received,
initialHash = initialHash,
ttl = ttl,
labels = labels,
status = status
)
constructor(
type: Type,
from: BitmessageAddress,
to: BitmessageAddress?,
encoding: Long,
message: ByteArray,
ackMessage: ByteArray?,
conversationId: UUID = UUID.randomUUID(),
inventoryVector: InventoryVector? = null,
signature: ByteArray? = null,
received: Long? = null,
initialHash: ByteArray? = null,
ttl: Long = TTL.msg,
labels: MutableSet<Label> = HashSet(),
status: Status
) : this(
type = type,
from = from,
to = to,
encodingCode = encoding,
message = message,
ackData = null,
ackMessage = lazy {
if (ackMessage != null && ackMessage.isNotEmpty()) {
Factory.getObjectMessage(
3,
ByteArrayInputStream(ackMessage),
ackMessage.size)
} else null
},
conversationId = conversationId,
inventoryVector = inventoryVector,
signature = signature,
received = received,
initialHash = initialHash,
ttl = ttl,
labels = labels,
status = status
)
constructor(
type: Type,
from: BitmessageAddress,
to: BitmessageAddress? = null,
encoding: Encoding = SIMPLE,
subject: String,
body: String,
ackData: ByteArray? = null,
conversationId: UUID = UUID.randomUUID(),
ttl: Long = TTL.msg,
labels: MutableSet<Label> = HashSet(),
status: Status = Status.DRAFT
) : this(
type = type,
from = from,
to = to,
encoding = encoding,
message = message(encoding, subject, body),
ackData = ackData(type, ackData),
conversationId = conversationId,
inventoryVector = null,
signature = null,
received = null,
initialHash = null,
ttl = ttl,
labels = labels,
status = status
)
constructor(builder: Builder) : this(
type = builder.type,
from = builder.from ?: throw IllegalStateException("sender identity not set"),
to = builder.to,
encodingCode = builder.encoding,
message = builder.message,
ackData = builder.ackData,
ackMessage = lazy {
val ackMsg = builder.ackMessage
if (ackMsg != null && ackMsg.isNotEmpty()) {
Factory.getObjectMessage(
3,
ByteArrayInputStream(ackMsg),
ackMsg.size)
} else {
Factory.createAck(builder.from!!, builder.ackData, builder.ttl)
}
},
conversationId = builder.conversation ?: UUID.randomUUID(),
inventoryVector = builder.inventoryVector,
signature = builder.signature,
sent = builder.sent,
received = builder.received,
initialHash = null,
ttl = builder.ttl,
labels = builder.labels,
status = builder.status ?: Status.RECEIVED
) {
id = builder.id
}
fun write(out: OutputStream, includeSignature: Boolean) {
Encode.varInt(from.version, out)
Encode.varInt(from.stream, out)
if (from.pubkey == null) {
Encode.int32(0, out)
val empty = ByteArray(64)
out.write(empty)
out.write(empty)
if (from.version >= 3) {
Encode.varInt(0, out)
Encode.varInt(0, out)
}
} else {
Encode.int32(from.pubkey!!.behaviorBitfield, out)
out.write(from.pubkey!!.signingKey, 1, 64)
out.write(from.pubkey!!.encryptionKey, 1, 64)
if (from.version >= 3) {
Encode.varInt(from.pubkey!!.nonceTrialsPerByte, out)
Encode.varInt(from.pubkey!!.extraBytes, out)
}
}
if (type == MSG) {
out.write(to!!.ripe)
}
Encode.varInt(encodingCode, out)
Encode.varInt(message.size, out)
out.write(message)
if (type == MSG) {
if (to?.has(Feature.DOES_ACK) ?: false) {
val ack = ByteArrayOutputStream()
ackMessage?.write(ack)
Encode.varBytes(ack.toByteArray(), out)
} else {
Encode.varInt(0, out)
}
}
if (includeSignature) {
if (signature == null) {
Encode.varInt(0, out)
} else {
Encode.varBytes(signature!!, out)
}
}
}
fun write(buffer: ByteBuffer, includeSignature: Boolean) {
Encode.varInt(from.version, buffer)
Encode.varInt(from.stream, buffer)
if (from.pubkey == null) {
Encode.int32(0, buffer)
val empty = ByteArray(64)
buffer.put(empty)
buffer.put(empty)
if (from.version >= 3) {
Encode.varInt(0, buffer)
Encode.varInt(0, buffer)
}
} else {
Encode.int32(from.pubkey!!.behaviorBitfield, buffer)
buffer.put(from.pubkey!!.signingKey, 1, 64)
buffer.put(from.pubkey!!.encryptionKey, 1, 64)
if (from.version >= 3) {
Encode.varInt(from.pubkey!!.nonceTrialsPerByte, buffer)
Encode.varInt(from.pubkey!!.extraBytes, buffer)
}
}
if (type == MSG) {
buffer.put(to!!.ripe)
}
Encode.varInt(encodingCode, buffer)
Encode.varBytes(message, buffer)
if (type == MSG) {
if (to!!.has(Feature.DOES_ACK) && ackMessage != null) {
Encode.varBytes(Encode.bytes(ackMessage!!), buffer)
} else {
Encode.varInt(0, buffer)
}
}
if (includeSignature) {
val sig = signature
if (sig == null) {
Encode.varInt(0, buffer)
} else {
Encode.varBytes(sig, buffer)
}
}
}
override fun write(out: OutputStream) {
write(out, true)
}
override fun write(buffer: ByteBuffer) {
write(buffer, true)
}
fun updateNextTry() {
if (to != null) {
if (nextTry == null) {
if (sent != null && to!!.has(Feature.DOES_ACK)) {
nextTry = UnixTime.now + ttl
retries++
}
} else {
nextTry = nextTry!! + (1 shl retries) * ttl
retries++
}
}
}
val subject: String?
get() {
val s = Scanner(ByteArrayInputStream(message), "UTF-8")
val firstLine = s.nextLine()
if (encodingCode == EXTENDED.code) {
if (Message.TYPE == extendedData?.type) {
return (extendedData!!.content as? Message)?.subject
} else {
return null
}
} else if (encodingCode == SIMPLE.code) {
return firstLine.substring("Subject:".length).trim { it <= ' ' }
} else if (firstLine.length > 50) {
return firstLine.substring(0, 50).trim { it <= ' ' } + "..."
} else {
return firstLine
}
}
val text: String?
get() {
if (encodingCode == EXTENDED.code) {
if (Message.TYPE == extendedData?.type) {
return (extendedData?.content as Message?)?.body
} else {
return null
}
} else {
val text = String(message)
if (encodingCode == SIMPLE.code) {
return text.substring(text.indexOf("\nBody:") + 6)
}
return text
}
}
fun <T : ExtendedEncoding.ExtendedType> getExtendedData(type: Class<T>): T? {
val extendedData = extendedData ?: return null
if (type.isInstance(extendedData.content)) {
@Suppress("UNCHECKED_CAST")
return extendedData.content as T
}
return null
}
val parents: List<InventoryVector>
get() {
val extendedData = extendedData ?: return emptyList()
if (Message.TYPE == extendedData.type) {
return (extendedData.content as Message).parents
} else {
return emptyList()
}
}
val files: List<Attachment>
get() {
val extendedData = extendedData ?: return emptyList()
if (Message.TYPE == extendedData.type) {
return (extendedData.content as Message).files
} else {
return emptyList()
}
}
override fun equals(other: Any?): Boolean {
if (this === other) return true
if (other !is Plaintext) return false
return encoding == other.encoding &&
from == other.from &&
Arrays.equals(message, other.message) &&
ackMessage == other.ackMessage &&
Arrays.equals(to?.ripe, other.to?.ripe) &&
Arrays.equals(signature, other.signature) &&
status == other.status &&
sent == other.sent &&
received == other.received &&
labels == other.labels
}
override fun hashCode(): Int {
return Objects.hash(from, encoding, message, ackData, to, signature, status, sent, received, labels)
}
fun addLabels(vararg labels: Label) {
Collections.addAll(this.labels, *labels)
}
fun addLabels(labels: Collection<Label>?) {
if (labels != null) {
this.labels.addAll(labels)
}
}
fun removeLabel(type: Label.Type) {
labels.removeAll { it.type == type }
}
fun isUnread(): Boolean {
return labels.any { it.type == Label.Type.UNREAD }
}
override fun toString(): String {
val subject = subject
if (subject?.isNotEmpty() ?: false) {
return subject!!
} else {
return Strings.hex(
initialHash ?: return super.toString()
)
}
}
enum class Encoding constructor(code: Long) {
IGNORE(0), TRIVIAL(1), SIMPLE(2), EXTENDED(3);
var code: Long = 0
internal set
init {
this.code = code
}
companion object {
@JvmStatic fun fromCode(code: Long): Encoding? {
for (e in values()) {
if (e.code == code) {
return e
}
}
return null
}
}
}
enum class Status {
DRAFT,
// For sent messages
PUBKEY_REQUESTED,
DOING_PROOF_OF_WORK,
SENT,
SENT_ACKNOWLEDGED,
RECEIVED
}
enum class Type {
MSG, BROADCAST
}
class Builder(internal val type: Type) {
internal var id: Any? = null
internal var inventoryVector: InventoryVector? = null
internal var from: BitmessageAddress? = null
internal var to: BitmessageAddress? = null
private var addressVersion: Long = 0
private var stream: Long = 0
private var behaviorBitfield: Int = 0
private var publicSigningKey: ByteArray? = null
private var publicEncryptionKey: ByteArray? = null
private var nonceTrialsPerByte: Long = 0
private var extraBytes: Long = 0
private var destinationRipe: ByteArray? = null
internal var encoding: Long = 0
internal var message = ByteArray(0)
internal var ackData: ByteArray? = null
internal var ackMessage: ByteArray? = null
internal var signature: ByteArray? = null
internal var sent: Long? = null
internal var received: Long? = null
internal var status: Status? = null
internal val labels = LinkedHashSet<Label>()
internal var ttl: Long = 0
internal var retries: Int = 0
internal var nextTry: Long? = null
internal var conversation: UUID? = null
fun id(id: Any): Builder {
this.id = id
return this
}
fun IV(iv: InventoryVector?): Builder {
this.inventoryVector = iv
return this
}
fun from(address: BitmessageAddress): Builder {
from = address
return this
}
fun to(address: BitmessageAddress?): Builder {
if (address != null) {
if (type != MSG && to != null)
throw IllegalArgumentException("recipient address only allowed for msg")
to = address
}
return this
}
fun addressVersion(addressVersion: Long): Builder {
this.addressVersion = addressVersion
return this
}
fun stream(stream: Long): Builder {
this.stream = stream
return this
}
fun behaviorBitfield(behaviorBitfield: Int): Builder {
this.behaviorBitfield = behaviorBitfield
return this
}
fun publicSigningKey(publicSigningKey: ByteArray): Builder {
this.publicSigningKey = publicSigningKey
return this
}
fun publicEncryptionKey(publicEncryptionKey: ByteArray): Builder {
this.publicEncryptionKey = publicEncryptionKey
return this
}
fun nonceTrialsPerByte(nonceTrialsPerByte: Long): Builder {
this.nonceTrialsPerByte = nonceTrialsPerByte
return this
}
fun extraBytes(extraBytes: Long): Builder {
this.extraBytes = extraBytes
return this
}
fun destinationRipe(ripe: ByteArray?): Builder {
if (type != MSG && ripe != null) throw IllegalArgumentException("ripe only allowed for msg")
this.destinationRipe = ripe
return this
}
fun encoding(encoding: Encoding): Builder {
this.encoding = encoding.code
return this
}
fun encoding(encoding: Long): Builder {
this.encoding = encoding
return this
}
fun message(message: ExtendedEncoding): Builder {
this.encoding = EXTENDED.code
this.message = message.zip()
return this
}
fun message(subject: String, message: String): Builder {
try {
this.encoding = SIMPLE.code
this.message = "Subject:$subject\nBody:$message".toByteArray(charset("UTF-8"))
} catch (e: UnsupportedEncodingException) {
throw ApplicationException(e)
}
return this
}
fun message(message: ByteArray): Builder {
this.message = message
return this
}
fun ackMessage(ack: ByteArray?): Builder {
if (type != MSG && ack != null) throw IllegalArgumentException("ackMessage only allowed for msg")
this.ackMessage = ack
return this
}
fun ackData(ackData: ByteArray?): Builder {
if (type != MSG && ackData != null)
throw IllegalArgumentException("ackMessage only allowed for msg")
this.ackData = ackData
return this
}
fun signature(signature: ByteArray): Builder {
this.signature = signature
return this
}
fun sent(sent: Long?): Builder {
this.sent = sent
return this
}
fun received(received: Long?): Builder {
this.received = received
return this
}
fun status(status: Status): Builder {
this.status = status
return this
}
fun labels(labels: Collection<Label>): Builder {
this.labels.addAll(labels)
return this
}
fun ttl(ttl: Long): Builder {
this.ttl = ttl
return this
}
fun retries(retries: Int): Builder {
this.retries = retries
return this
}
fun nextTry(nextTry: Long?): Builder {
this.nextTry = nextTry
return this
}
fun conversation(id: UUID): Builder {
this.conversation = id
return this
}
fun build(): Plaintext {
if (from == null) {
from = BitmessageAddress(Factory.createPubkey(
addressVersion,
stream,
publicSigningKey!!,
publicEncryptionKey!!,
nonceTrialsPerByte,
extraBytes,
behaviorBitfield
))
}
if (to == null && type != Type.BROADCAST && destinationRipe != null) {
to = BitmessageAddress(0, 0, destinationRipe!!)
}
if (type == MSG && ackMessage == null && ackData == null) {
ackData = cryptography().randomBytes(Msg.ACK_LENGTH)
}
if (ttl <= 0) {
ttl = TTL.msg
}
return Plaintext(this)
}
}
companion object {
@JvmStatic fun read(type: Type, `in`: InputStream): Plaintext {
return readWithoutSignature(type, `in`)
.signature(Decode.varBytes(`in`))
.received(UnixTime.now)
.build()
}
@JvmStatic fun readWithoutSignature(type: Type, `in`: InputStream): Plaintext.Builder {
val version = Decode.varInt(`in`)
return Builder(type)
.addressVersion(version)
.stream(Decode.varInt(`in`))
.behaviorBitfield(Decode.int32(`in`))
.publicSigningKey(Decode.bytes(`in`, 64))
.publicEncryptionKey(Decode.bytes(`in`, 64))
.nonceTrialsPerByte(if (version >= 3) Decode.varInt(`in`) else 0)
.extraBytes(if (version >= 3) Decode.varInt(`in`) else 0)
.destinationRipe(if (type == MSG) Decode.bytes(`in`, 20) else null)
.encoding(Decode.varInt(`in`))
.message(Decode.varBytes(`in`))
.ackMessage(if (type == MSG) Decode.varBytes(`in`) else null)
}
}
}

8
core/src/main/java/ch/dissem/bitmessage/entity/PlaintextHolder.java → core/src/main/kotlin/ch/dissem/bitmessage/entity/PlaintextHolder.kt
View File

@ -1,5 +1,5 @@
/* /*
* Copyright 2015 Christian Basler * Copyright 2017 Christian Basler
* *
* Licensed under the Apache License, Version 2.0 (the "License"); * Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License. * you may not use this file except in compliance with the License.
@ -14,8 +14,8 @@
* limitations under the License. * limitations under the License.
*/ */
package ch.dissem.bitmessage.entity; package ch.dissem.bitmessage.entity
public interface PlaintextHolder { interface PlaintextHolder {
Plaintext getPlaintext(); val plaintext: Plaintext?
} }

30
core/src/main/kotlin/ch/dissem/bitmessage/entity/Streamable.kt Normal file
View File

@ -0,0 +1,30 @@
/*
* Copyright 2017 Christian Basler
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package ch.dissem.bitmessage.entity
import java.io.OutputStream
import java.io.Serializable
import java.nio.ByteBuffer
/**
* An object that can be written to an [OutputStream]
*/
interface Streamable : Serializable {
fun write(out: OutputStream)
fun write(buffer: ByteBuffer)
}

27
core/src/main/java/ch/dissem/bitmessage/entity/VerAck.java → core/src/main/kotlin/ch/dissem/bitmessage/entity/VerAck.kt
View File

@ -1,5 +1,5 @@
/* /*
* Copyright 2015 Christian Basler * Copyright 2017 Christian Basler
* *
* Licensed under the Apache License, Version 2.0 (the "License"); * Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License. * you may not use this file except in compliance with the License.
@ -14,30 +14,27 @@
* limitations under the License. * limitations under the License.
*/ */
package ch.dissem.bitmessage.entity; package ch.dissem.bitmessage.entity
import java.io.IOException; import java.io.OutputStream
import java.io.OutputStream; import java.nio.ByteBuffer
import java.nio.ByteBuffer;
/** /**
* The 'verack' command answers a 'version' command, accepting the other node's version. * The 'verack' command answers a 'version' command, accepting the other node's version.
*/ */
public class VerAck implements MessagePayload { class VerAck : MessagePayload {
private static final long serialVersionUID = -4302074845199181687L;
@Override override val command: MessagePayload.Command = MessagePayload.Command.VERACK
public Command getCommand() {
return Command.VERACK;
}
@Override override fun write(out: OutputStream) {
public void write(OutputStream stream) throws IOException {
// 'verack' doesn't have any payload, so there is nothing to write // 'verack' doesn't have any payload, so there is nothing to write
} }
@Override override fun write(buffer: ByteBuffer) {
public void write(ByteBuffer buffer) {
// 'verack' doesn't have any payload, so there is nothing to write // 'verack' doesn't have any payload, so there is nothing to write
} }
companion object {
private val serialVersionUID = -4302074845199181687L
}
} }

204
core/src/main/kotlin/ch/dissem/bitmessage/entity/Version.kt Normal file
View File

@ -0,0 +1,204 @@
/*
* Copyright 2017 Christian Basler
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package ch.dissem.bitmessage.entity
import ch.dissem.bitmessage.BitmessageContext
import ch.dissem.bitmessage.entity.valueobject.NetworkAddress
import ch.dissem.bitmessage.utils.Encode
import ch.dissem.bitmessage.utils.UnixTime
import java.io.OutputStream
import java.nio.ByteBuffer
/**
* The 'version' command advertises this node's latest supported protocol version upon initiation.
*/
class Version constructor(
/**
* Identifies protocol version being used by the node. Should equal 3. Nodes should disconnect if the remote node's
* version is lower but continue with the connection if it is higher.
*/
val version: Int = BitmessageContext.CURRENT_VERSION,
/**
* bitfield of features to be enabled for this connection
*/
val services: Long = Version.Service.getServiceFlag(Version.Service.NODE_NETWORK),
/**
* standard UNIX timestamp in seconds
*/
val timestamp: Long = UnixTime.now,
/**
* The network address of the node receiving this message (not including the time or stream number)
*/
val addrRecv: NetworkAddress,
/**
* The network address of the node emitting this message (not including the time or stream number and the ip itself
* is ignored by the receiver)
*/
val addrFrom: NetworkAddress,
/**
* Random nonce used to detect connections to self.
*/
val nonce: Long,
/**
* User Agent (0x00 if string is 0 bytes long). Sending nodes must not include a user_agent longer than 5000 bytes.
*/
val userAgent: String,
/**
* The stream numbers that the emitting node is interested in. Sending nodes must not include more than 160000
* stream numbers.
*/
val streams: LongArray = longArrayOf(1)
) : MessagePayload {
fun provides(service: Service?): Boolean {
return service != null && service.isEnabled(services)
}
override val command: MessagePayload.Command = MessagePayload.Command.VERSION
override fun write(out: OutputStream) {
Encode.int32(version, out)
Encode.int64(services, out)
Encode.int64(timestamp, out)
addrRecv.write(out, true)
addrFrom.write(out, true)
Encode.int64(nonce, out)
Encode.varString(userAgent, out)
Encode.varIntList(streams, out)
}
override fun write(buffer: ByteBuffer) {
Encode.int32(version, buffer)
Encode.int64(services, buffer)
Encode.int64(timestamp, buffer)
addrRecv.write(buffer, true)
addrFrom.write(buffer, true)
Encode.int64(nonce, buffer)
Encode.varString(userAgent, buffer)
Encode.varIntList(streams, buffer)
}
class Builder {
private var version: Int = 0
private var services: Long = 0
private var timestamp: Long = 0
private var addrRecv: NetworkAddress? = null
private var addrFrom: NetworkAddress? = null
private var nonce: Long = 0
private var userAgent: String? = null
private var streamNumbers: LongArray? = null
fun defaults(clientNonce: Long): Builder {
version = BitmessageContext.CURRENT_VERSION
services = Service.getServiceFlag(Service.NODE_NETWORK)
timestamp = UnixTime.now
userAgent = "/Jabit:0.0.1/"
streamNumbers = longArrayOf(1)
nonce = clientNonce
return this
}
fun version(version: Int): Builder {
this.version = version
return this
}
fun services(vararg services: Service): Builder {
this.services = Service.getServiceFlag(*services)
return this
}
fun services(services: Long): Builder {
this.services = services
return this
}
fun timestamp(timestamp: Long): Builder {
this.timestamp = timestamp
return this
}
fun addrRecv(addrRecv: NetworkAddress): Builder {
this.addrRecv = addrRecv
return this
}
fun addrFrom(addrFrom: NetworkAddress): Builder {
this.addrFrom = addrFrom
return this
}
fun nonce(nonce: Long): Builder {
this.nonce = nonce
return this
}
fun userAgent(userAgent: String): Builder {
this.userAgent = userAgent
return this
}
fun streams(vararg streamNumbers: Long): Builder {
this.streamNumbers = streamNumbers
return this
}
fun build(): Version {
val addrRecv = this.addrRecv
val addrFrom = this.addrFrom
if (addrRecv == null || addrFrom == null) {
throw IllegalStateException("Receiving and sending address must be set")
}
return Version(
version = version,
services = services,
timestamp = timestamp,
addrRecv = addrRecv, addrFrom = addrFrom,
nonce = nonce,
userAgent = userAgent ?: "/Jabit:0.0.1/",
streams = streamNumbers ?: longArrayOf(1)
)
}
}
enum class Service constructor(internal var flag: Long) {
// TODO: NODE_SSL(2);
NODE_NETWORK(1);
fun isEnabled(flag: Long): Boolean {
return (flag and this.flag) != 0L
}
companion object {
fun getServiceFlag(vararg services: Service): Long {
var flag: Long = 0
for (service in services) {
flag = flag or service.flag
}
return flag
}
}
}
}

78
core/src/main/kotlin/ch/dissem/bitmessage/entity/payload/Broadcast.kt Normal file
View File

@ -0,0 +1,78 @@
/*
* Copyright 2017 Christian Basler
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package ch.dissem.bitmessage.entity.payload
import ch.dissem.bitmessage.entity.BitmessageAddress
import ch.dissem.bitmessage.entity.Encrypted
import ch.dissem.bitmessage.entity.Plaintext
import ch.dissem.bitmessage.entity.Plaintext.Type.BROADCAST
import ch.dissem.bitmessage.entity.PlaintextHolder
import ch.dissem.bitmessage.exception.DecryptionFailedException
import ch.dissem.bitmessage.utils.Singleton.cryptography
import java.util.*
/**
* Users who are subscribed to the sending address will see the message appear in their inbox.
* Broadcasts are version 4 or 5.
*/
abstract class Broadcast protected constructor(version: Long, override val stream: Long, protected var encrypted: CryptoBox?, override var plaintext: Plaintext?) : ObjectPayload(version), Encrypted, PlaintextHolder {
override val isSigned: Boolean = true
override var signature: ByteArray?
get() = plaintext?.signature
set(signature) {
plaintext?.signature = signature ?: throw IllegalStateException("no plaintext data available")
}
override fun encrypt(publicKey: ByteArray) {
this.encrypted = CryptoBox(plaintext ?: throw IllegalStateException("no plaintext data available"), publicKey)
}
fun encrypt() {
encrypt(cryptography().createPublicKey(plaintext?.from?.publicDecryptionKey ?: return))
}
@Throws(DecryptionFailedException::class)
override fun decrypt(privateKey: ByteArray) {
plaintext = Plaintext.read(BROADCAST, encrypted?.decrypt(privateKey) ?: return)
}
@Throws(DecryptionFailedException::class)
fun decrypt(address: BitmessageAddress) {
decrypt(address.publicDecryptionKey)
}
override val isDecrypted: Boolean
get() = plaintext != null
override fun equals(other: Any?): Boolean {
if (this === other) return true
if (other !is Broadcast) return false
return stream == other.stream && (encrypted == other.encrypted || plaintext == other.plaintext)
}
override fun hashCode(): Int {
return Objects.hash(stream)
}
companion object {
fun getVersion(address: BitmessageAddress): Long {
return if (address.version < 4) 4L else 5L
}
}
}

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/*
* Copyright 2017 Christian Basler
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package ch.dissem.bitmessage.entity.payload
import ch.dissem.bitmessage.entity.Streamable
import ch.dissem.bitmessage.entity.valueobject.PrivateKey.Companion.PRIVATE_KEY_SIZE
import ch.dissem.bitmessage.exception.DecryptionFailedException
import ch.dissem.bitmessage.utils.*
import ch.dissem.bitmessage.utils.Singleton.cryptography
import org.slf4j.LoggerFactory
import java.io.ByteArrayInputStream
import java.io.ByteArrayOutputStream
import java.io.InputStream
import java.io.OutputStream
import java.nio.ByteBuffer
import java.util.*
class CryptoBox : Streamable {
private val initializationVector: ByteArray
private val curveType: Int
private val R: ByteArray
private val mac: ByteArray
private var encrypted: ByteArray
constructor(data: Streamable, K: ByteArray) : this(Encode.bytes(data), K)
constructor(data: ByteArray, K: ByteArray) {
curveType = 0x02CA
// 1. The destination public key is called K.
// 2. Generate 16 random bytes using a secure random number generator. Call them IV.
initializationVector = cryptography().randomBytes(16)
// 3. Generate a new random EC key pair with private key called r and public key called R.
val r = cryptography().randomBytes(PRIVATE_KEY_SIZE)
R = cryptography().createPublicKey(r)
// 4. Do an EC point multiply with public key K and private key r. This gives you public key P.
val P = cryptography().multiply(K, r)
val X = Points.getX(P)
// 5. Use the X component of public key P and calculate the SHA512 hash H.
val H = cryptography().sha512(X)
// 6. The first 32 bytes of H are called key_e and the last 32 bytes are called key_m.
val key_e = Arrays.copyOfRange(H, 0, 32)
val key_m = Arrays.copyOfRange(H, 32, 64)
// 7. Pad the input text to a multiple of 16 bytes, in accordance to PKCS7.
// 8. Encrypt the data with AES-256-CBC, using IV as initialization vector, key_e as encryption key and the padded input text as payload. Call the output cipher text.
encrypted = cryptography().crypt(true, data, key_e, initializationVector)
// 9. Calculate a 32 byte MAC with HMACSHA256, using key_m as salt and IV + R + cipher text as data. Call the output MAC.
mac = calculateMac(key_m)
// The resulting data is: IV + R + cipher text + MAC
}
private constructor(builder: Builder) {
initializationVector = builder.initializationVector!!
curveType = builder.curveType
R = cryptography().createPoint(builder.xComponent!!, builder.yComponent!!)
encrypted = builder.encrypted!!
mac = builder.mac!!
}
/**
* @param k a private key, typically should be 32 bytes long
* *
* @return an InputStream yielding the decrypted data
* *
* @throws DecryptionFailedException if the payload can't be decrypted using this private key
* *
* @see [https://bitmessage.org/wiki/Encryption.Decryption](https://bitmessage.org/wiki/Encryption.Decryption)
*/
@Throws(DecryptionFailedException::class)
fun decrypt(k: ByteArray): InputStream {
// 1. The private key used to decrypt is called k.
// 2. Do an EC point multiply with private key k and public key R. This gives you public key P.
val P = cryptography().multiply(R, k)
// 3. Use the X component of public key P and calculate the SHA512 hash H.
val H = cryptography().sha512(Arrays.copyOfRange(P, 1, 33))
// 4. The first 32 bytes of H are called key_e and the last 32 bytes are called key_m.
val key_e = Arrays.copyOfRange(H, 0, 32)
val key_m = Arrays.copyOfRange(H, 32, 64)
// 5. Calculate MAC' with HMACSHA256, using key_m as salt and IV + R + cipher text as data.
// 6. Compare MAC with MAC'. If not equal, decryption will fail.
if (!Arrays.equals(mac, calculateMac(key_m))) {
throw DecryptionFailedException()
}
// 7. Decrypt the cipher text with AES-256-CBC, using IV as initialization vector, key_e as decryption key
// and the cipher text as payload. The output is the padded input text.
return ByteArrayInputStream(cryptography().crypt(false, encrypted, key_e, initializationVector))
}
private fun calculateMac(key_m: ByteArray): ByteArray {
val macData = ByteArrayOutputStream()
writeWithoutMAC(macData)
return cryptography().mac(key_m, macData.toByteArray())
}
private fun writeWithoutMAC(out: OutputStream) {
out.write(initializationVector)
Encode.int16(curveType, out)
writeCoordinateComponent(out, Points.getX(R))
writeCoordinateComponent(out, Points.getY(R))
out.write(encrypted)
}
private fun writeCoordinateComponent(out: OutputStream, x: ByteArray) {
val offset = Bytes.numberOfLeadingZeros(x)
val length = x.size - offset
Encode.int16(length, out)
out.write(x, offset, length)
}
private fun writeCoordinateComponent(buffer: ByteBuffer, x: ByteArray) {
val offset = Bytes.numberOfLeadingZeros(x)
val length = x.size - offset
Encode.int16(length, buffer)
buffer.put(x, offset, length)
}
override fun write(out: OutputStream) {
writeWithoutMAC(out)
out.write(mac)
}
override fun write(buffer: ByteBuffer) {
buffer.put(initializationVector)
Encode.int16(curveType, buffer)
writeCoordinateComponent(buffer, Points.getX(R))
writeCoordinateComponent(buffer, Points.getY(R))
buffer.put(encrypted)
buffer.put(mac)
}
class Builder {
internal var initializationVector: ByteArray? = null
internal var curveType: Int = 0
internal var xComponent: ByteArray? = null
internal var yComponent: ByteArray? = null
internal var encrypted: ByteArray? = null
internal var mac: ByteArray? = null
fun IV(initializationVector: ByteArray): Builder {
this.initializationVector = initializationVector
return this
}
fun curveType(curveType: Int): Builder {
if (curveType != 0x2CA) LOG.trace("Unexpected curve type " + curveType)
this.curveType = curveType
return this
}
fun X(xComponent: ByteArray): Builder {
this.xComponent = xComponent
return this
}
fun Y(yComponent: ByteArray): Builder {
this.yComponent = yComponent
return this
}
fun encrypted(encrypted: ByteArray): Builder {
this.encrypted = encrypted
return this
}
fun MAC(mac: ByteArray): Builder {
this.mac = mac
return this
}
fun build(): CryptoBox {
return CryptoBox(this)
}
}
companion object {
private val LOG = LoggerFactory.getLogger(CryptoBox::class.java)
@JvmStatic fun read(stream: InputStream, length: Int): CryptoBox {
val counter = AccessCounter()
return Builder()
.IV(Decode.bytes(stream, 16, counter))
.curveType(Decode.uint16(stream, counter))
.X(Decode.shortVarBytes(stream, counter))
.Y(Decode.shortVarBytes(stream, counter))
.encrypted(Decode.bytes(stream, length - counter.length() - 32))
.MAC(Decode.bytes(stream, 32))
.build()
}
}
}

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core/src/main/kotlin/ch/dissem/bitmessage/entity/payload/GenericPayload.kt Normal file
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/*
* Copyright 2017 Christian Basler
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package ch.dissem.bitmessage.entity.payload
import ch.dissem.bitmessage.utils.Decode
import java.io.InputStream
import java.io.OutputStream
import java.nio.ByteBuffer
import java.util.*
/**
* In cases we don't know what to do with an object, we just store its bytes and send it again - we don't really
* have to know what it is.
*/
class GenericPayload(version: Long, override val stream: Long, val data: ByteArray) : ObjectPayload(version) {
override val type: ObjectType? = null
override fun write(out: OutputStream) {
out.write(data)
}
override fun write(buffer: ByteBuffer) {
buffer.put(data)
}
override fun equals(other: Any?): Boolean {
if (this === other) return true
if (other !is GenericPayload) return false
if (stream != other.stream) return false
return Arrays.equals(data, other.data)
}
override fun hashCode(): Int {
var result = (stream xor stream.ushr(32)).toInt()
result = 31 * result + Arrays.hashCode(data)
return result
}
companion object {
@JvmStatic fun read(version: Long, stream: Long, `is`: InputStream, length: Int): GenericPayload {
return GenericPayload(version, stream, Decode.bytes(`is`, length))
}
}
}

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core/src/main/kotlin/ch/dissem/bitmessage/entity/payload/GetPubkey.kt Normal file
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/*
* Copyright 2017 Christian Basler
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package ch.dissem.bitmessage.entity.payload
import ch.dissem.bitmessage.entity.BitmessageAddress
import ch.dissem.bitmessage.utils.Decode
import java.io.InputStream
import java.io.OutputStream
import java.nio.ByteBuffer
/**
* Request for a public key.
*/
class GetPubkey : ObjectPayload {
override val type: ObjectType = ObjectType.GET_PUBKEY
override val stream: Long
/**
* @return an array of bytes that represent either the ripe, or the tag of an address, depending on the
* * address version.
*/
val ripeTag: ByteArray
constructor(address: BitmessageAddress) : super(address.version) {
this.stream = address.stream
this.ripeTag = if (address.version < 4) address.ripe else
address.tag ?: throw IllegalStateException("Address of version 4 without tag shouldn't exist!")
}
private constructor(version: Long, stream: Long, ripeOrTag: ByteArray) : super(version) {
this.stream = stream
this.ripeTag = ripeOrTag
}
override fun write(out: OutputStream) {
out.write(ripeTag)
}
override fun write(buffer: ByteBuffer) {
buffer.put(ripeTag)
}
companion object {
@JvmStatic fun read(`is`: InputStream, stream: Long, length: Int, version: Long): GetPubkey {
return GetPubkey(version, stream, Decode.bytes(`is`, length))
}
}
}

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core/src/main/kotlin/ch/dissem/bitmessage/entity/payload/Msg.kt Normal file
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/*
* Copyright 2017 Christian Basler
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package ch.dissem.bitmessage.entity.payload
import ch.dissem.bitmessage.entity.Encrypted
import ch.dissem.bitmessage.entity.Plaintext
import ch.dissem.bitmessage.entity.Plaintext.Type.MSG
import ch.dissem.bitmessage.entity.PlaintextHolder
import ch.dissem.bitmessage.exception.DecryptionFailedException
import java.io.InputStream
import java.io.OutputStream
import java.nio.ByteBuffer
/**
* Used for person-to-person messages.
*/
class Msg : ObjectPayload, Encrypted, PlaintextHolder {
override val stream: Long
private var encrypted: CryptoBox?
override var plaintext: Plaintext?
private set
private constructor(stream: Long, encrypted: CryptoBox) : super(1) {
this.stream = stream
this.encrypted = encrypted
this.plaintext = null
}
constructor(plaintext: Plaintext) : super(1) {
this.stream = plaintext.stream
this.encrypted = null
this.plaintext = plaintext
}
override val type: ObjectType = ObjectType.MSG
override val isSigned: Boolean = true
override fun writeBytesToSign(out: OutputStream) {
plaintext?.write(out, false) ?: throw IllegalStateException("no plaintext data available")
}
override var signature: ByteArray?
get() = plaintext?.signature
set(signature) {
plaintext?.signature = signature ?: throw IllegalStateException("no plaintext data available")
}
override fun encrypt(publicKey: ByteArray) {
this.encrypted = CryptoBox(plaintext ?: throw IllegalStateException("no plaintext data available"), publicKey)
}
@Throws(DecryptionFailedException::class)
override fun decrypt(privateKey: ByteArray) {
plaintext = Plaintext.read(MSG, encrypted!!.decrypt(privateKey))
}
override val isDecrypted: Boolean
get() = plaintext != null
override fun write(out: OutputStream) {
encrypted?.write(out) ?: throw IllegalStateException("Msg must be signed and encrypted before writing it.")
}
override fun write(buffer: ByteBuffer) {
encrypted?.write(buffer) ?: throw IllegalStateException("Msg must be signed and encrypted before writing it.")
}
override fun equals(other: Any?): Boolean {
if (this === other) return true
if (other !is Msg) return false
if (!super.equals(other)) return false
return stream == other.stream && (encrypted == other.encrypted || plaintext == other.plaintext)
}
override fun hashCode(): Int {
return stream.toInt()
}
companion object {
val ACK_LENGTH = 32
@JvmStatic fun read(`in`: InputStream, stream: Long, length: Int): Msg {
return Msg(stream, CryptoBox.read(`in`, length))
}
}
}

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core/src/main/kotlin/ch/dissem/bitmessage/entity/payload/ObjectPayload.kt Normal file
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/*
* Copyright 2017 Christian Basler
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package ch.dissem.bitmessage.entity.payload
import ch.dissem.bitmessage.entity.ObjectMessage
import ch.dissem.bitmessage.entity.Streamable
import java.io.OutputStream
/**
* The payload of an 'object' command. This is shared by the network.
*/
abstract class ObjectPayload protected constructor(val version: Long) : Streamable {
abstract val type: ObjectType?
abstract val stream: Long
open val isSigned: Boolean = false
open fun writeBytesToSign(out: OutputStream) {
// nothing to do
}
/**
* @return the ECDSA signature which, as of protocol v3, covers the object header starting with the time,
* * appended with the data described in this table down to the extra_bytes. Therefore, this must
* * be checked and set in the [ObjectMessage] object.
*/
open var signature: ByteArray? = null
}

23
core/src/main/java/ch/dissem/bitmessage/entity/payload/ObjectType.java → core/src/main/kotlin/ch/dissem/bitmessage/entity/payload/ObjectType.kt
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@ -1,5 +1,5 @@
/* /*
* Copyright 2015 Christian Basler * Copyright 2017 Christian Basler
* *
* Licensed under the Apache License, Version 2.0 (the "License"); * Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License. * you may not use this file except in compliance with the License.
@ -14,31 +14,20 @@
* limitations under the License. * limitations under the License.
*/ */
package ch.dissem.bitmessage.entity.payload; package ch.dissem.bitmessage.entity.payload
/** /**
* Known types for 'object' messages. Must not be used where an unknown type must be resent. * Known types for 'object' messages. Must not be used where an unknown type must be resent.
*/ */
public enum ObjectType { enum class ObjectType constructor(val number: Long) {
GET_PUBKEY(0), GET_PUBKEY(0),
PUBKEY(1), PUBKEY(1),
MSG(2), MSG(2),
BROADCAST(3); BROADCAST(3);
int number; companion object {
@JvmStatic fun fromNumber(number: Long): ObjectType? {
ObjectType(int number) { return values().firstOrNull { it.number == number }
this.number = number;
} }
public static ObjectType fromNumber(long number) {
for (ObjectType type : values()) {
if (type.number == number) return type;
}
return null;
}
public long getNumber() {
return number;
} }
} }

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core/src/main/kotlin/ch/dissem/bitmessage/entity/payload/Pubkey.kt Normal file
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/*
* Copyright 2017 Christian Basler
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package ch.dissem.bitmessage.entity.payload
import ch.dissem.bitmessage.InternalContext.Companion.NETWORK_EXTRA_BYTES
import ch.dissem.bitmessage.InternalContext.Companion.NETWORK_NONCE_TRIALS_PER_BYTE
import ch.dissem.bitmessage.utils.Singleton.cryptography
import java.io.OutputStream
import java.nio.ByteBuffer
import java.util.*
/**
* Public keys for signing and encryption, the answer to a 'getpubkey' request.
*/
abstract class Pubkey protected constructor(version: Long) : ObjectPayload(version) {
override val type: ObjectType = ObjectType.PUBKEY
abstract val signingKey: ByteArray
abstract val encryptionKey: ByteArray
abstract val behaviorBitfield: Int
val ripe: ByteArray by lazy { cryptography().ripemd160(cryptography().sha512(signingKey, encryptionKey)) }
open val nonceTrialsPerByte: Long = NETWORK_NONCE_TRIALS_PER_BYTE
open val extraBytes: Long = NETWORK_EXTRA_BYTES
open fun writeUnencrypted(out: OutputStream) {
write(out)
}
open fun writeUnencrypted(buffer: ByteBuffer) {
write(buffer)
}
/**
* Bits 0 through 29 are yet undefined
*/
enum class Feature constructor(bitNumber: Int) {
/**
* Receiving node expects that the RIPE hash encoded in their address preceedes the encrypted message data of msg
* messages bound for them.
*/
INCLUDE_DESTINATION(30),
/**
* If true, the receiving node does send acknowledgements (rather than dropping them).
*/
DOES_ACK(31);
// The Bitmessage Protocol Specification starts counting at the most significant bit,
// thus the slightly awkward calculation.
// https://bitmessage.org/wiki/Protocol_specification#Pubkey_bitfield_features
private val bit: Int = 1 shl 31 - bitNumber
fun isActive(bitfield: Int): Boolean {
return bitfield and bit != 0
}
companion object {
@JvmStatic fun bitfield(vararg features: Feature): Int {
var bits = 0
for (feature in features) {
bits = bits or feature.bit
}
return bits
}
@JvmStatic fun features(bitfield: Int): Array<Feature> {
val features = ArrayList<Feature>(Feature.values().size)
for (feature in Feature.values()) {
if (bitfield and feature.bit != 0) {
features.add(feature)
}
}
return features.toTypedArray()
}
}
}
companion object {
@JvmField val LATEST_VERSION: Long = 4
fun getRipe(publicSigningKey: ByteArray, publicEncryptionKey: ByteArray): ByteArray {
return cryptography().ripemd160(cryptography().sha512(publicSigningKey, publicEncryptionKey))
}
fun add0x04(key: ByteArray): ByteArray {
if (key.size == 65) return key
val result = ByteArray(65)
result[0] = 4
System.arraycopy(key, 0, result, 1, 64)
return result
}
}
}

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core/src/main/kotlin/ch/dissem/bitmessage/entity/payload/V2Pubkey.kt Normal file
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/*
* Copyright 2017 Christian Basler
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package ch.dissem.bitmessage.entity.payload
import ch.dissem.bitmessage.utils.Decode
import ch.dissem.bitmessage.utils.Encode
import java.io.InputStream
import java.io.OutputStream
import java.nio.ByteBuffer
/**
* A version 2 public key.
*/
open class V2Pubkey constructor(version: Long, override val stream: Long, override val behaviorBitfield: Int, signingKey: ByteArray, encryptionKey: ByteArray) : Pubkey(version) {
override val signingKey: ByteArray = if (signingKey.size == 64) add0x04(signingKey) else signingKey
override val encryptionKey: ByteArray = if (encryptionKey.size == 64) add0x04(encryptionKey) else encryptionKey
override fun write(out: OutputStream) {
Encode.int32(behaviorBitfield, out)
out.write(signingKey, 1, 64)
out.write(encryptionKey, 1, 64)
}
override fun write(buffer: ByteBuffer) {
Encode.int32(behaviorBitfield, buffer)
buffer.put(signingKey, 1, 64)
buffer.put(encryptionKey, 1, 64)
}
class Builder {
internal var streamNumber: Long = 0
internal var behaviorBitfield: Int = 0
internal var publicSigningKey: ByteArray? = null
internal var publicEncryptionKey: ByteArray? = null
fun stream(streamNumber: Long): Builder {
this.streamNumber = streamNumber
return this
}
fun behaviorBitfield(behaviorBitfield: Int): Builder {
this.behaviorBitfield = behaviorBitfield
return this
}
fun publicSigningKey(publicSigningKey: ByteArray): Builder {
this.publicSigningKey = publicSigningKey
return this
}
fun publicEncryptionKey(publicEncryptionKey: ByteArray): Builder {
this.publicEncryptionKey = publicEncryptionKey
return this
}
fun build(): V2Pubkey {
return V2Pubkey(
version = 2,
stream = streamNumber,
behaviorBitfield = behaviorBitfield,
signingKey = add0x04(publicSigningKey!!),
encryptionKey = add0x04(publicEncryptionKey!!)
)
}
}
companion object {
@JvmStatic fun read(`in`: InputStream, stream: Long): V2Pubkey {
return V2Pubkey(
version = 2,
stream = stream,
behaviorBitfield = Decode.uint32(`in`).toInt(),
signingKey = Decode.bytes(`in`, 64),
encryptionKey = Decode.bytes(`in`, 64)
)
}
}
}

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/*
* Copyright 2017 Christian Basler
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package ch.dissem.bitmessage.entity.payload
import ch.dissem.bitmessage.utils.Decode
import ch.dissem.bitmessage.utils.Encode
import java.io.InputStream
import java.io.OutputStream
import java.nio.ByteBuffer
import java.util.*
/**
* A version 3 public key.
*/
class V3Pubkey protected constructor(
version: Long, stream: Long, behaviorBitfield: Int,
signingKey: ByteArray, encryptionKey: ByteArray,
override val nonceTrialsPerByte: Long,
override val extraBytes: Long,
override var signature: ByteArray? = null
) : V2Pubkey(version, stream, behaviorBitfield, signingKey, encryptionKey) {
override fun write(out: OutputStream) {
writeBytesToSign(out)
Encode.varBytes(
signature ?: throw IllegalStateException("signature not available"),
out
)
}
override fun write(buffer: ByteBuffer) {
super.write(buffer)
Encode.varInt(nonceTrialsPerByte, buffer)
Encode.varInt(extraBytes, buffer)
Encode.varBytes(
signature ?: throw IllegalStateException("signature not available"),
buffer
)
}
override val isSigned: Boolean = true
override fun writeBytesToSign(out: OutputStream) {
super.write(out)
Encode.varInt(nonceTrialsPerByte, out)
Encode.varInt(extraBytes, out)
}
override fun equals(other: Any?): Boolean {
if (this === other) return true
if (other !is V3Pubkey) return false
return nonceTrialsPerByte == other.nonceTrialsPerByte &&
extraBytes == other.extraBytes &&
stream == other.stream &&
behaviorBitfield == other.behaviorBitfield &&
Arrays.equals(signingKey, other.signingKey) &&
Arrays.equals(encryptionKey, other.encryptionKey)
}
override fun hashCode(): Int {
return Objects.hash(nonceTrialsPerByte, extraBytes)
}
class Builder {
private var streamNumber: Long = 0
private var behaviorBitfield: Int = 0
private var publicSigningKey: ByteArray? = null
private var publicEncryptionKey: ByteArray? = null
private var nonceTrialsPerByte: Long = 0
private var extraBytes: Long = 0
private var signature = ByteArray(0)
fun stream(streamNumber: Long): Builder {
this.streamNumber = streamNumber
return this
}
fun behaviorBitfield(behaviorBitfield: Int): Builder {
this.behaviorBitfield = behaviorBitfield
return this
}
fun publicSigningKey(publicSigningKey: ByteArray): Builder {
this.publicSigningKey = publicSigningKey
return this
}
fun publicEncryptionKey(publicEncryptionKey: ByteArray): Builder {
this.publicEncryptionKey = publicEncryptionKey
return this
}
fun nonceTrialsPerByte(nonceTrialsPerByte: Long): Builder {
this.nonceTrialsPerByte = nonceTrialsPerByte
return this
}
fun extraBytes(extraBytes: Long): Builder {
this.extraBytes = extraBytes
return this
}
fun signature(signature: ByteArray): Builder {
this.signature = signature
return this
}
fun build(): V3Pubkey {
return V3Pubkey(
version = 3,
stream = streamNumber,
behaviorBitfield = behaviorBitfield,
signingKey = publicSigningKey!!,
encryptionKey = publicEncryptionKey!!,
nonceTrialsPerByte = nonceTrialsPerByte,
extraBytes = extraBytes,
signature = signature
)
}
}
companion object {
@JvmStatic fun read(`is`: InputStream, stream: Long): V3Pubkey {
return V3Pubkey(
version = 3,
stream = stream,
behaviorBitfield = Decode.int32(`is`),
signingKey = Decode.bytes(`is`, 64),
encryptionKey = Decode.bytes(`is`, 64),
nonceTrialsPerByte = Decode.varInt(`is`),
extraBytes = Decode.varInt(`is`),
signature = Decode.varBytes(`is`)
)
}
}
}

59
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/*
* Copyright 2017 Christian Basler
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package ch.dissem.bitmessage.entity.payload
import ch.dissem.bitmessage.entity.BitmessageAddress
import ch.dissem.bitmessage.entity.Plaintext
import java.io.InputStream
import java.io.OutputStream
import java.nio.ByteBuffer
/**
* Users who are subscribed to the sending address will see the message appear in their inbox.
* Broadcasts are version 4 or 5.
*/
open class V4Broadcast : Broadcast {
override val type: ObjectType = ObjectType.BROADCAST
protected constructor(version: Long, stream: Long, encrypted: CryptoBox?, plaintext: Plaintext?) : super(version, stream, encrypted, plaintext)
constructor(senderAddress: BitmessageAddress, plaintext: Plaintext) : super(4, senderAddress.stream, null, plaintext) {
if (senderAddress.version >= 4)
throw IllegalArgumentException("Address version 3 or older expected, but was " + senderAddress.version)
}
override fun writeBytesToSign(out: OutputStream) {
plaintext?.write(out, false) ?: throw IllegalStateException("no plaintext data available")
}
override fun write(out: OutputStream) {
encrypted?.write(out) ?: throw IllegalStateException("broadcast not encrypted")
}
override fun write(buffer: ByteBuffer) {
encrypted?.write(buffer) ?: throw IllegalStateException("broadcast not encrypted")
}
companion object {
@JvmStatic fun read(`in`: InputStream, stream: Long, length: Int): V4Broadcast {
return V4Broadcast(4, stream, CryptoBox.read(`in`, length), null)
}
}
}

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/*
* Copyright 2017 Christian Basler
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package ch.dissem.bitmessage.entity.payload
import ch.dissem.bitmessage.entity.BitmessageAddress
import ch.dissem.bitmessage.entity.Encrypted
import ch.dissem.bitmessage.exception.DecryptionFailedException
import ch.dissem.bitmessage.utils.Decode
import java.io.InputStream
import java.io.OutputStream
import java.nio.ByteBuffer
import java.util.*
/**
* A version 4 public key. When version 4 pubkeys are created, most of the data in the pubkey is encrypted. This is
* done in such a way that only someone who has the Bitmessage address which corresponds to a pubkey can decrypt and
* use that pubkey. This prevents people from gathering pubkeys sent around the network and using the data from them
* to create messages to be used in spam or in flooding attacks.
*/
class V4Pubkey : Pubkey, Encrypted {
override val stream: Long
val tag: ByteArray
private var encrypted: CryptoBox? = null
private var decrypted: V3Pubkey? = null
private constructor(stream: Long, tag: ByteArray, encrypted: CryptoBox) : super(4) {
this.stream = stream
this.tag = tag
this.encrypted = encrypted
}
constructor(decrypted: V3Pubkey) : super(4) {
this.stream = decrypted.stream
this.decrypted = decrypted
this.tag = BitmessageAddress.calculateTag(4, decrypted.stream, decrypted.ripe)
}
override fun encrypt(publicKey: ByteArray) {
if (signature == null) throw IllegalStateException("Pubkey must be signed before encryption.")
this.encrypted = CryptoBox(decrypted ?: throw IllegalStateException("no plaintext pubkey data available"), publicKey)
}
@Throws(DecryptionFailedException::class)
override fun decrypt(privateKey: ByteArray) {
decrypted = V3Pubkey.read(encrypted?.decrypt(privateKey) ?: throw IllegalStateException("no encrypted data available"), stream)
}
override val isDecrypted: Boolean
get() = decrypted != null
override fun write(out: OutputStream) {
out.write(tag)
encrypted?.write(out) ?: throw IllegalStateException("pubkey is encrypted")
}
override fun write(buffer: ByteBuffer) {
buffer.put(tag)
encrypted?.write(buffer) ?: throw IllegalStateException("pubkey is encrypted")
}
override fun writeUnencrypted(out: OutputStream) {
decrypted?.write(out) ?: throw IllegalStateException("pubkey is encrypted")
}
override fun writeUnencrypted(buffer: ByteBuffer) {
decrypted?.write(buffer) ?: throw IllegalStateException("pubkey is encrypted")
}
override fun writeBytesToSign(out: OutputStream) {
out.write(tag)
decrypted?.writeBytesToSign(out) ?: throw IllegalStateException("pubkey is encrypted")
}
override val signingKey: ByteArray
get() = decrypted?.signingKey ?: throw IllegalStateException("pubkey is encrypted")
override val encryptionKey: ByteArray
get() = decrypted?.encryptionKey ?: throw IllegalStateException("pubkey is encrypted")
override val behaviorBitfield: Int
get() = decrypted?.behaviorBitfield ?: throw IllegalStateException("pubkey is encrypted")
override var signature: ByteArray?
get() = decrypted?.signature
set(signature) {
decrypted?.signature = signature
}
override val isSigned: Boolean = true
override val nonceTrialsPerByte: Long
get() = decrypted?.nonceTrialsPerByte ?: throw IllegalStateException("pubkey is encrypted")
override val extraBytes: Long
get() = decrypted?.extraBytes ?: throw IllegalStateException("pubkey is encrypted")
override fun equals(other: Any?): Boolean {
if (this === other) return true
if (other !is V4Pubkey) return false
if (stream != other.stream) return false
if (!Arrays.equals(tag, other.tag)) return false
return !if (decrypted != null) decrypted != other.decrypted else other.decrypted != null
}
override fun hashCode(): Int {
var result = (stream xor stream.ushr(32)).toInt()
result = 31 * result + Arrays.hashCode(tag)
result = 31 * result + if (decrypted != null) decrypted!!.hashCode() else 0
return result
}
companion object {
@JvmStatic fun read(`in`: InputStream, stream: Long, length: Int, encrypted: Boolean): V4Pubkey {
if (encrypted)
return V4Pubkey(stream,
Decode.bytes(`in`, 32),
CryptoBox.read(`in`, length - 32))
else
return V4Pubkey(V3Pubkey.read(`in`, stream))
}
}
}

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/*
* Copyright 2017 Christian Basler
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package ch.dissem.bitmessage.entity.payload
import ch.dissem.bitmessage.entity.BitmessageAddress
import ch.dissem.bitmessage.entity.Plaintext
import ch.dissem.bitmessage.utils.Decode
import java.io.InputStream
import java.io.OutputStream
/**
* Users who are subscribed to the sending address will see the message appear in their inbox.
*/
class V5Broadcast : V4Broadcast {
val tag: ByteArray
private constructor(stream: Long, tag: ByteArray, encrypted: CryptoBox) : super(5, stream, encrypted, null) {
this.tag = tag
}
constructor(senderAddress: BitmessageAddress, plaintext: Plaintext) : super(5, senderAddress.stream, null, plaintext) {
if (senderAddress.version < 4)
throw IllegalArgumentException("Address version 4 (or newer) expected, but was " + senderAddress.version)
this.tag = senderAddress.tag ?: throw IllegalStateException("version 4 address without tag")
}
override fun writeBytesToSign(out: OutputStream) {
out.write(tag)
super.writeBytesToSign(out)
}
override fun write(out: OutputStream) {
out.write(tag)
super.write(out)
}
companion object {
@JvmStatic fun read(`is`: InputStream, stream: Long, length: Int): V5Broadcast {
return V5Broadcast(stream, Decode.bytes(`is`, 32), CryptoBox.read(`is`, length - 32))
}
}
}

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core/src/main/kotlin/ch/dissem/bitmessage/entity/valueobject/ExtendedEncoding.kt Normal file
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/*
* Copyright 2017 Christian Basler
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package ch.dissem.bitmessage.entity.valueobject
import ch.dissem.msgpack.types.MPMap
import ch.dissem.msgpack.types.MPString
import ch.dissem.msgpack.types.MPType
import java.io.ByteArrayOutputStream
import java.io.Serializable
import java.util.zip.DeflaterOutputStream
/**
* Extended encoding message object.
*/
data class ExtendedEncoding(val content: ExtendedEncoding.ExtendedType) : Serializable {
val type: String? = content.type
fun zip(): ByteArray {
ByteArrayOutputStream().use { out ->
DeflaterOutputStream(out).use { zipper -> content.pack().pack(zipper) }
return out.toByteArray()
}
}
interface Unpacker<out T : ExtendedType> {
val type: String
fun unpack(map: MPMap<MPString, MPType<*>>): T
}
interface ExtendedType : Serializable {
val type: String
fun pack(): MPMap<MPString, MPType<*>>
}
}

61
core/src/main/kotlin/ch/dissem/bitmessage/entity/valueobject/InventoryVector.kt Normal file
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/*
* Copyright 2017 Christian Basler
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package ch.dissem.bitmessage.entity.valueobject
import ch.dissem.bitmessage.entity.Streamable
import ch.dissem.bitmessage.utils.Strings
import java.io.OutputStream
import java.nio.ByteBuffer
import java.util.*
data class InventoryVector constructor(
/**
* Hash of the object
*/
val hash: ByteArray) : Streamable {
override fun equals(other: Any?): Boolean {
if (this === other) return true
if (other !is InventoryVector) return false
return Arrays.equals(hash, other.hash)
}
override fun hashCode(): Int {
return Arrays.hashCode(hash)
}
override fun write(out: OutputStream) {
out.write(hash)
}
override fun write(buffer: ByteBuffer) {
buffer.put(hash)
}
override fun toString(): String {
return Strings.hex(hash)
}
companion object {
@JvmStatic fun fromHash(hash: ByteArray?): InventoryVector? {
return InventoryVector(
hash ?: return null
)
}
}
}

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/*
* Copyright 2017 Christian Basler
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package ch.dissem.bitmessage.entity.valueobject
import java.io.Serializable
import java.util.*
data class Label(
private val label: String,
val type: Label.Type? = null,
/**
* RGBA representation for the color.
*/
var color: Int = 0
) : Serializable {
var id: Any? = null
override fun toString(): String {
return label
}
override fun equals(other: Any?): Boolean {
if (this === other) return true
if (other !is Label) return false
return label == other.label
}
override fun hashCode(): Int {
return Objects.hash(label)
}
enum class Type {
INBOX,
BROADCAST,
DRAFT,
OUTBOX,
SENT,
UNREAD,
TRASH
}
}

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/*
* Copyright 2017 Christian Basler
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package ch.dissem.bitmessage.entity.valueobject
import ch.dissem.bitmessage.entity.Streamable
import ch.dissem.bitmessage.entity.Version
import ch.dissem.bitmessage.utils.Encode
import ch.dissem.bitmessage.utils.UnixTime
import java.io.OutputStream
import java.net.InetAddress
import java.net.InetSocketAddress
import java.net.Socket
import java.net.SocketAddress
import java.nio.ByteBuffer
import java.util.*
fun ip6(inetAddress: InetAddress): ByteArray {
val address = inetAddress.address
when (address.size) {
16 -> {
return address
}
4 -> {
val ip6 = ByteArray(16)
ip6[10] = 0xff.toByte()
ip6[11] = 0xff.toByte()
System.arraycopy(address, 0, ip6, 12, 4)
return ip6
}
else -> throw IllegalArgumentException("Weird address " + inetAddress)
}
}
/**
* A node's address. It's written in IPv6 format.
*/
data class NetworkAddress(
var time: Long,
/**
* Stream number for this node
*/
val stream: Long,
/**
* same service(s) listed in version
*/
val services: Long,
/**
* IPv6 address. IPv4 addresses are written into the message as a 16 byte IPv4-mapped IPv6 address
* (12 bytes 00 00 00 00 00 00 00 00 00 00 FF FF, followed by the 4 bytes of the IPv4 address).
*/
val IPv6: ByteArray,
val port: Int
) : Streamable {
constructor(time: Long, stream: Long, services: Long = 1, socket: Socket)
: this(time, stream, services, ip6(socket.inetAddress), socket.port)
constructor(time: Long, stream: Long, services: Long = 1, inetAddress: InetAddress, port: Int)
: this(time, stream, services, ip6(inetAddress), port)
fun provides(service: Version.Service?): Boolean = service?.isEnabled(services) ?: false
fun toInetAddress(): InetAddress {
return InetAddress.getByAddress(IPv6)
}
override fun equals(other: Any?): Boolean {
if (this === other) return true
if (other !is NetworkAddress) return false
return port == other.port && Arrays.equals(IPv6, other.IPv6)
}
override fun hashCode(): Int {
var result = Arrays.hashCode(IPv6)
result = 31 * result + port
return result
}
override fun toString(): String {
return "[" + toInetAddress() + "]:" + port
}
override fun write(out: OutputStream) {
write(out, false)
}
fun write(out: OutputStream, light: Boolean) {
if (!light) {
Encode.int64(time, out)
Encode.int32(stream, out)
}
Encode.int64(services, out)
out.write(IPv6)
Encode.int16(port, out)
}
override fun write(buffer: ByteBuffer) {
write(buffer, false)
}
fun write(buffer: ByteBuffer, light: Boolean) {
if (!light) {
Encode.int64(time, buffer)
Encode.int32(stream, buffer)
}
Encode.int64(services, buffer)
buffer.put(IPv6)
Encode.int16(port, buffer)
}
class Builder {
internal var time: Long? = null
internal var stream: Long = 0
internal var services: Long = 1
internal var ipv6: ByteArray? = null
internal var port: Int = 0
fun time(time: Long): Builder {
this.time = time
return this
}
fun stream(stream: Long): Builder {
this.stream = stream
return this
}
fun services(services: Long): Builder {
this.services = services
return this
}
fun ip(inetAddress: InetAddress): Builder {
ipv6 = ip6(inetAddress)
return this
}
fun ipv6(ipv6: ByteArray): Builder {
this.ipv6 = ipv6
return this
}
fun ipv6(p00: Int, p01: Int, p02: Int, p03: Int,
p04: Int, p05: Int, p06: Int, p07: Int,
p08: Int, p09: Int, p10: Int, p11: Int,
p12: Int, p13: Int, p14: Int, p15: Int): Builder {
this.ipv6 = byteArrayOf(p00.toByte(), p01.toByte(), p02.toByte(), p03.toByte(), p04.toByte(), p05.toByte(), p06.toByte(), p07.toByte(), p08.toByte(), p09.toByte(), p10.toByte(), p11.toByte(), p12.toByte(), p13.toByte(), p14.toByte(), p15.toByte())
return this
}
fun ipv4(p00: Int, p01: Int, p02: Int, p03: Int): Builder {
this.ipv6 = byteArrayOf(0.toByte(), 0.toByte(), 0x00.toByte(), 0x00.toByte(), 0.toByte(), 0.toByte(), 0x00.toByte(), 0x00.toByte(), 0.toByte(), 0.toByte(), 0xff.toByte(), 0xff.toByte(), p00.toByte(), p01.toByte(), p02.toByte(), p03.toByte())
return this
}
fun port(port: Int): Builder {
this.port = port
return this
}
fun address(address: SocketAddress): Builder {
if (address is InetSocketAddress) {
ip(address.address)
port(address.port)
} else {
throw IllegalArgumentException("Unknown type of address: " + address.javaClass)
}
return this
}
fun build(): NetworkAddress {
return NetworkAddress(
time ?: UnixTime.now, stream, services, ipv6!!, port
)
}
}
companion object {
@JvmField val ANY = NetworkAddress(time = 0, stream = 0, services = 0, IPv6 = ByteArray(16), port = 0)
}
}

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/*
* Copyright 2017 Christian Basler
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package ch.dissem.bitmessage.entity.valueobject
import ch.dissem.bitmessage.InternalContext
import ch.dissem.bitmessage.entity.BitmessageAddress
import ch.dissem.bitmessage.entity.Streamable
import ch.dissem.bitmessage.entity.payload.Pubkey
import ch.dissem.bitmessage.exception.ApplicationException
import ch.dissem.bitmessage.factory.Factory
import ch.dissem.bitmessage.utils.Bytes
import ch.dissem.bitmessage.utils.Decode
import ch.dissem.bitmessage.utils.Encode
import ch.dissem.bitmessage.utils.Singleton.cryptography
import java.io.*
import java.nio.ByteBuffer
import java.util.*
/**
* Represents a private key. Additional information (stream, version, features, ...) is stored in the accompanying
* [Pubkey] object.
*/
class PrivateKey : Streamable {
val privateSigningKey: ByteArray
val privateEncryptionKey: ByteArray
val pubkey: Pubkey
constructor(shorter: Boolean, stream: Long, nonceTrialsPerByte: Long, extraBytes: Long, vararg features: Pubkey.Feature) {
var privSK: ByteArray
var pubSK: ByteArray
var privEK: ByteArray
var pubEK: ByteArray
var ripe: ByteArray
do {
privSK = cryptography().randomBytes(PRIVATE_KEY_SIZE)
privEK = cryptography().randomBytes(PRIVATE_KEY_SIZE)
pubSK = cryptography().createPublicKey(privSK)
pubEK = cryptography().createPublicKey(privEK)
ripe = Pubkey.getRipe(pubSK, pubEK)
} while (ripe[0].toInt() != 0 || shorter && ripe[1].toInt() != 0)
this.privateSigningKey = privSK
this.privateEncryptionKey = privEK
this.pubkey = cryptography().createPubkey(Pubkey.LATEST_VERSION, stream, privateSigningKey, privateEncryptionKey,
nonceTrialsPerByte, extraBytes, *features)
}
constructor(privateSigningKey: ByteArray, privateEncryptionKey: ByteArray, pubkey: Pubkey) {
this.privateSigningKey = privateSigningKey
this.privateEncryptionKey = privateEncryptionKey
this.pubkey = pubkey
}
constructor(address: BitmessageAddress, passphrase: String) : this(address.version, address.stream, passphrase)
constructor(version: Long, stream: Long, passphrase: String) : this(Builder(version, stream, false).seed(passphrase).generate())
private constructor(builder: Builder) {
this.privateSigningKey = builder.privSK!!
this.privateEncryptionKey = builder.privEK!!
this.pubkey = Factory.createPubkey(builder.version, builder.stream, builder.pubSK!!, builder.pubEK!!,
InternalContext.NETWORK_NONCE_TRIALS_PER_BYTE, InternalContext.NETWORK_EXTRA_BYTES)
}
private class Builder internal constructor(internal val version: Long, internal val stream: Long, internal val shorter: Boolean) {
internal var seed: ByteArray? = null
internal var nextNonce: Long = 0
internal var privSK: ByteArray? = null
internal var privEK: ByteArray? = null
internal var pubSK: ByteArray? = null
internal var pubEK: ByteArray? = null
internal fun seed(passphrase: String): Builder {
try {
seed = passphrase.toByteArray(charset("UTF-8"))
} catch (e: UnsupportedEncodingException) {
throw ApplicationException(e)
}
return this
}
internal fun generate(): Builder {
var signingKeyNonce = nextNonce
var encryptionKeyNonce = nextNonce + 1
var ripe: ByteArray
do {
privEK = Bytes.truncate(cryptography().sha512(seed!!, Encode.varInt(encryptionKeyNonce)), 32)
privSK = Bytes.truncate(cryptography().sha512(seed!!, Encode.varInt(signingKeyNonce)), 32)
pubSK = cryptography().createPublicKey(privSK!!)
pubEK = cryptography().createPublicKey(privEK!!)
ripe = cryptography().ripemd160(cryptography().sha512(pubSK!!, pubEK!!))
signingKeyNonce += 2
encryptionKeyNonce += 2
} while (ripe[0].toInt() != 0 || shorter && ripe[1].toInt() != 0)
nextNonce = signingKeyNonce
return this
}
}
override fun write(out: OutputStream) {
Encode.varInt(pubkey.version, out)
Encode.varInt(pubkey.stream, out)
val baos = ByteArrayOutputStream()
pubkey.writeUnencrypted(baos)
Encode.varInt(baos.size(), out)
out.write(baos.toByteArray())
Encode.varBytes(privateSigningKey, out)
Encode.varBytes(privateEncryptionKey, out)
}
override fun write(buffer: ByteBuffer) {
Encode.varInt(pubkey.version, buffer)
Encode.varInt(pubkey.stream, buffer)
try {
val baos = ByteArrayOutputStream()
pubkey.writeUnencrypted(baos)
Encode.varBytes(baos.toByteArray(), buffer)
} catch (e: IOException) {
throw ApplicationException(e)
}
Encode.varBytes(privateSigningKey, buffer)
Encode.varBytes(privateEncryptionKey, buffer)
}
companion object {
@JvmField val PRIVATE_KEY_SIZE = 32
@JvmStatic fun deterministic(passphrase: String, numberOfAddresses: Int, version: Long, stream: Long, shorter: Boolean): List<PrivateKey> {
val result = ArrayList<PrivateKey>(numberOfAddresses)
val builder = Builder(version, stream, shorter).seed(passphrase)
for (i in 0..numberOfAddresses - 1) {
builder.generate()
result.add(PrivateKey(builder))
}
return result
}
@JvmStatic fun read(`is`: InputStream): PrivateKey {
val version = Decode.varInt(`is`).toInt()
val stream = Decode.varInt(`is`)
val len = Decode.varInt(`is`).toInt()
val pubkey = Factory.readPubkey(version.toLong(), stream, `is`, len, false) ?: throw ApplicationException("Unknown pubkey version encountered")
val signingKey = Decode.varBytes(`is`)
val encryptionKey = Decode.varBytes(`is`)
return PrivateKey(signingKey, encryptionKey, pubkey)
}
}
}

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