🐛 Fix connectivity issues and improve code

* NioNetworkHandler lets you tweak the minimum number of connections
* BufferPool can now set a limit to how many Buffers it retains.
  This one might still need some tweaking.

.gitignore

@@ -49,7 +49,7 @@ gradle-app.setting
 ## Plugin-specific files:
 
 # IntelliJ
-/out/
+out/
 
 # mpeltonen/sbt-idea plugin
 .idea_modules/

README.md

@@ -9,7 +9,7 @@ A Java implementation for the Bitmessage protocol. To build, use command `./grad
 
 Please note that it still has its limitations, but the API should now be stable. Jabit uses Semantic Versioning, meaning as long as the major version doesn't change, nothing should break if you update.
 
-Be aware though that this doesn't necessarily applies for SNAPSHOT builds and the development branch, notably when it comes to database updates. _In other words, they may break your installation!_ 
+Be aware though that this doesn't necessarily applies for SNAPSHOT builds and the development branch, notably when it comes to database updates. In other words, they may break your installation!_ 
 
 #### Master
 [![Build Status](https://travis-ci.org/Dissem/Jabit.svg?branch=master)](https://travis-ci.org/Dissem/Jabit) 

build.gradle

@@ -1,15 +1,38 @@
+buildscript {
+    ext.kotlin_version = '1.2.71'
+    repositories {
+        mavenCentral()
+    }
+    dependencies {
+        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
+    }
+}
+plugins {
+    id 'com.github.ben-manes.versions' version '0.17.0'
+    id "io.spring.dependency-management" version "1.0.4.RELEASE"
+}
+
 subprojects {
-    apply plugin: 'java'
+    apply plugin: 'io.spring.dependency-management'
+    apply plugin: 'kotlin'
     apply plugin: 'maven'
     apply plugin: 'signing'
     apply plugin: 'jacoco'
     apply plugin: 'gitflow-version'
+    apply plugin: 'com.github.ben-manes.versions'
 
     sourceCompatibility = 1.7
+    targetCompatibility = 1.7
     group = 'ch.dissem.jabit'
 
     repositories {
         mavenCentral()
+        maven { url 'https://oss.sonatype.org/content/repositories/snapshots/' }
+        jcenter()
+    }
+    dependencies {
+        implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7"
+        implementation "org.jetbrains.kotlin:kotlin-reflect"
     }
 
     test {
@@ -28,10 +51,26 @@ subprojects {
         from sourceSets.main.allSource
     }
 
+    compileKotlin {
+        kotlinOptions.jvmTarget = "1.6"
+    }
+
+    compileTestKotlin {
+        kotlinOptions.jvmTarget = "1.6"
+    }
+
     artifacts {
         archives javadocJar, sourcesJar
     }
 
+    jar {
+        manifest {
+            attributes 'Implementation-Title': "Jabit ${project.name.capitalize()}",
+                       'Implementation-Version': version
+        }
+        baseName "jabit-${project.name}"
+    }
+
     signing {
         required { isRelease && project.getProperties().get("signing.keyId")?.length() > 0 }
         sign configurations.archives
@@ -87,4 +126,34 @@ subprojects {
     }
 
     check.dependsOn jacocoTestReport
+
+    dependencyManagement {
+        dependencies {
+            dependencySet(group: 'org.jetbrains.kotlin', version: "$kotlin_version") {
+                entry 'kotlin-stdlib-jdk7'
+                entry 'kotlin-reflect'
+            }
+            dependencySet(group: 'org.slf4j', version: '1.7.25') {
+                entry 'slf4j-api'
+                entry 'slf4j-simple'
+            }
+
+            dependency 'ch.dissem.msgpack:msgpack:2.0.1'
+            dependency 'org.bouncycastle:bcprov-jdk15on:1.60'
+            dependency 'com.madgag.spongycastle:prov:1.58.0.0'
+            dependency 'org.apache.commons:commons-text:1.5'
+            dependency 'org.flywaydb:flyway-core:5.2.0'
+            dependency 'com.beust:klaxon:3.0.8'
+
+            dependency 'args4j:args4j:2.33'
+            dependency 'org.ini4j:ini4j:0.5.4'
+            dependency 'com.h2database:h2:1.4.197'
+
+            dependency 'org.hamcrest:java-hamcrest:2.0.0.0'
+            dependency 'com.nhaarman:mockito-kotlin:1.6.0'
+
+            dependency 'org.junit.jupiter:junit-jupiter-api:5.3.1'
+            dependency 'org.junit.jupiter:junit-jupiter-engine:5.3.1'
+        }
+    }
 }

buildSrc/src/main/groovy/ch/dissem/gradle/GitFlowVersion.groovy

@@ -50,8 +50,8 @@ class GitFlowVersion implements Plugin<Project> {
         project.ext.isRelease = isRelease(project)
         project.version = getVersion(project)
 
-        project.task('version') << {
-            println "Version deduced from git: '${project.version}'"
+        project.task('version') {
+            doLast { println "Version deduced from git: '${project.version}'" }
         }
     }
 }

core/build.gradle

@@ -24,9 +24,28 @@ artifacts {
 }
 
 dependencies {
-    compile 'org.slf4j:slf4j-api:1.7.12'
-    testCompile 'junit:junit:4.12'
-    testCompile 'org.hamcrest:hamcrest-library:1.3'
-    testCompile 'org.mockito:mockito-core:1.10.19'
+    compile 'org.slf4j:slf4j-api'
+    compile 'ch.dissem.msgpack:msgpack'
+    testCompile 'com.nhaarman:mockito-kotlin'
+    testCompile 'org.junit.jupiter:junit-jupiter-api'
+    testRuntime 'org.junit.jupiter:junit-jupiter-engine'
     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())
+    }
+}

core/src/main/java/ch/dissem/bitmessage/BitmessageContext.java

@@ -1,451 +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 ch.dissem.bitmessage.utils.TTL;
-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.*;
-
-/**
- * <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) {
-        if (builder.listener instanceof Listener.WithContext) {
-            ((Listener.WithContext) builder.listener).setContext(this);
-        }
-        ctx = new InternalContext(builder);
-        labeler = builder.labeler;
-        ctx.getProofOfWorkService().doMissingProofOfWork(30_000); // TODO: this should be configurable
-        sendPubkeyOnIdentityCreation = builder.sendPubkeyOnIdentityCreation;
-    }
-
-    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) {
-            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;
-        }
-
-        /**
-         * Time to live in seconds for public keys the client sends. Defaults to the maximum of 28 days,
-         * but on weak devices smaller values might be desirable.
-         * <p>
-         * Please be aware that this might cause some problems where you can't receive a message (the
-         * sender can't receive your public key) in some special situations. Also note that it's probably
-         * not a good idea to set it too low.
-         * </p>
-         *
-         * @deprecated use {@link TTL#pubkey(long)} instead.
-         */
-        public Builder pubkeyTTL(long days) {
-            if (days < 0 || days > 28 * DAY) throw new IllegalArgumentException("TTL must be between 1 and 28 days");
-            TTL.pubkey(days);
-            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) {
-                        throw new IllegalStateException(
-                            "Received custom request, but no custom command handler configured.");
-                    }
-                };
-            }
-            return new BitmessageContext(this);
-        }
-
-        private void nonNull(String name, Object o) {
-            if (o == null) throw new IllegalStateException(name + " must not be null");
-        }
-    }
-
-}

core/src/main/java/ch/dissem/bitmessage/DefaultMessageListener.java

@@ -1,187 +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 28 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) {
-                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) {
-        msg.setInventoryVector(iv);
-        labeler.setLabels(msg);
-        ctx.getMessageRepository().save(msg);
-        listener.receive(msg);
-        updatePubkey(msg.getFrom(), msg.getFrom().getPubkey());
-
-        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());
-            }
-        }
-    }
-}

core/src/main/java/ch/dissem/bitmessage/InternalContext.java

@@ -1,317 +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;
-
-/**
- * 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 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) {
-        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);
-    }
-}

core/src/main/java/ch/dissem/bitmessage/ProofOfWorkService.java

@@ -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 = powRepo.getItem(initialHash).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();
-    }
-}

core/src/main/java/ch/dissem/bitmessage/entity/Addr.java

@@ -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);
-        }
-    }
-}

core/src/main/java/ch/dissem/bitmessage/entity/BitmessageAddress.java

@@ -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());
-    }
-}

core/src/main/java/ch/dissem/bitmessage/entity/CustomMessage.java

@@ -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);
-        }
-    }
-}

core/src/main/java/ch/dissem/bitmessage/entity/GetData.java

@@ -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);
-        }
-    }
-}

core/src/main/java/ch/dissem/bitmessage/entity/Inv.java

@@ -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);
-        }
-    }
-}

core/src/main/java/ch/dissem/bitmessage/entity/NetworkMessage.java

@@ -1,151 +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.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;
-    }
-}

core/src/main/java/ch/dissem/bitmessage/entity/ObjectMessage.java

@@ -1,271 +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.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 new InventoryVector(
-                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;
-    }
-}

core/src/main/java/ch/dissem/bitmessage/entity/Plaintext.java

@@ -1,612 +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.Msg;
-import ch.dissem.bitmessage.entity.payload.Pubkey.Feature;
-import ch.dissem.bitmessage.entity.valueobject.InventoryVector;
-import ch.dissem.bitmessage.entity.valueobject.Label;
-import ch.dissem.bitmessage.exception.ApplicationException;
-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.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 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;
-    }
-
-    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 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);
-        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);
-        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 == 2) {
-            return firstLine.substring("Subject:".length()).trim();
-        } else if (firstLine.length() > 50) {
-            return firstLine.substring(0, 50).trim() + "...";
-        } else {
-            return firstLine;
-        }
-    }
-
-    public String getText() {
-        try {
-            String text = new String(message, "UTF-8");
-            if (encoding == 2) {
-                return text.substring(text.indexOf("\nBody:") + 6);
-            }
-            return text;
-        } catch (UnsupportedEncodingException e) {
-            throw new ApplicationException(e);
-        }
-    }
-
-    @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) {
-            for (Label label : labels) {
-                this.labels.add(label);
-            }
-        }
-    }
-
-    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;
-    }
-
-    public enum Encoding {
-        IGNORE(0), TRIVIAL(1), SIMPLE(2);
-
-        long code;
-
-        Encoding(long code) {
-            this.code = code;
-        }
-
-        public long getCode() {
-            return code;
-        }
-    }
-
-    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 HashSet<>();
-        private long ttl;
-        private int retries;
-        private Long nextTry;
-
-        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(String subject, String message) {
-            try {
-                this.encoding = 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 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();
-            }
-            return new Plaintext(this);
-        }
-    }
-}

core/src/main/java/ch/dissem/bitmessage/entity/Version.java

@@ -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.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 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 = 1;
-            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(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);
-        }
-    }
-}

core/src/main/java/ch/dissem/bitmessage/entity/payload/Broadcast.java

@@ -1,114 +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.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);
-    }
-}

core/src/main/java/ch/dissem/bitmessage/entity/payload/CryptoBox.java

@@ -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.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);
-        }
-    }
-}

core/src/main/java/ch/dissem/bitmessage/entity/payload/GenericPayload.java

@@ -1,88 +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 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;
-    }
-}

core/src/main/java/ch/dissem/bitmessage/entity/payload/GetPubkey.java

@@ -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.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);
-    }
-}

core/src/main/java/ch/dissem/bitmessage/entity/payload/Msg.java

@@ -1,135 +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.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;
-    }
-}

core/src/main/java/ch/dissem/bitmessage/entity/payload/ObjectPayload.java

@@ -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
-    }
-}

core/src/main/java/ch/dissem/bitmessage/entity/payload/Pubkey.java

@@ -1,121 +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 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;
-        }
-    }
-}

core/src/main/java/ch/dissem/bitmessage/entity/payload/V2Pubkey.java

@@ -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);
-        }
-    }
-}

core/src/main/java/ch/dissem/bitmessage/entity/payload/V3Pubkey.java

@@ -1,167 +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.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.varInt(signature.length, out);
-        out.write(signature);
-    }
-
-    @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);
-        }
-    }
-}

core/src/main/java/ch/dissem/bitmessage/entity/payload/V4Broadcast.java

@@ -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);
-    }
-}

core/src/main/java/ch/dissem/bitmessage/entity/payload/V4Pubkey.java

@@ -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;
-    }
-}

core/src/main/java/ch/dissem/bitmessage/entity/payload/V5Broadcast.java

@@ -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);
-    }
-}

core/src/main/java/ch/dissem/bitmessage/entity/valueobject/InventoryVector.java

@@ -1,73 +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;
-    }
-
-    public InventoryVector(byte[] hash) {
-        this.hash = 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();
-    }
-}

core/src/main/java/ch/dissem/bitmessage/entity/valueobject/Label.java

@@ -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
-    }
-}

core/src/main/java/ch/dissem/bitmessage/entity/valueobject/NetworkAddress.java

@@ -1,238 +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.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 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);
-        }
-    }
-}

core/src/main/java/ch/dissem/bitmessage/entity/valueobject/PrivateKey.java

@@ -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);
-    }
-}

core/src/main/java/ch/dissem/bitmessage/exception/InsufficientProofOfWorkException.java

@@ -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.");
-    }
-}

core/src/main/java/ch/dissem/bitmessage/factory/BufferPool.java

@@ -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);
-    }
-}

core/src/main/java/ch/dissem/bitmessage/factory/Factory.java

@@ -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();
-    }
-}

core/src/main/java/ch/dissem/bitmessage/factory/V3MessageFactory.java

@@ -1,232 +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 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) {
-            LOG.trace("Could not parse object payload - using generic payload instead", e);
-            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 new InventoryVector(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");
-    }
-}

core/src/main/java/ch/dissem/bitmessage/factory/V3MessageReader.java

@@ -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}
-}

core/src/main/java/ch/dissem/bitmessage/ports/AbstractCryptography.java

@@ -1,192 +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.GeneralSecurityException;
-import java.security.MessageDigest;
-import java.security.Provider;
-import java.security.SecureRandom;
-
-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 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);
-        }
-    }
-
-    @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();
-    }
-}

core/src/main/java/ch/dissem/bitmessage/ports/AbstractMessageRepository.java

@@ -1,127 +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.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.List;
-
-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;
-    }
-
-    protected void safeSenderIfNecessary(Plaintext message) {
-        if (message.getId() == null) {
-            BitmessageAddress savedAddress = ctx.getAddressRepository().getAddress(message.getFrom().getAddress());
-            if (savedAddress == null) {
-                ctx.getAddressRepository().save(message.getFrom());
-            } else if (savedAddress.getPubkey() == null && message.getFrom().getPubkey() != null) {
-                savedAddress.setPubkey(message.getFrom().getPubkey());
-                ctx.getAddressRepository().save(savedAddress);
-            }
-        }
-    }
-
-    @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(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<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);
-}

core/src/main/java/ch/dissem/bitmessage/ports/AddressRepository.java

@@ -1,52 +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.entity.BitmessageAddress;
-
-import java.util.List;
-
-public interface AddressRepository {
-    BitmessageAddress findContact(byte[] ripeOrTag);
-
-    BitmessageAddress findIdentity(byte[] ripeOrTag);
-
-    /**
-     * @return all Bitmessage addresses that belong to this user, i.e. have a private key.
-     */
-    List<BitmessageAddress> getIdentities();
-
-    /**
-     * @return all subscribed chans.
-     */
-    List<BitmessageAddress> getChans();
-
-    List<BitmessageAddress> getSubscriptions();
-
-    List<BitmessageAddress> getSubscriptions(long broadcastVersion);
-
-    /**
-     * @return all Bitmessage addresses that have no private key or are chans.
-     */
-    List<BitmessageAddress> getContacts();
-
-    void save(BitmessageAddress address);
-
-    void remove(BitmessageAddress address);
-
-    BitmessageAddress getAddress(String address);
-}

core/src/main/java/ch/dissem/bitmessage/ports/DefaultLabeler.java

@@ -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.ports;
-