465 lines
13 KiB
Java
465 lines
13 KiB
Java
/*
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* Copyright 2015 Christian Basler
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package ch.dissem.bitmessage.entity;
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import ch.dissem.bitmessage.entity.valueobject.InventoryVector;
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import ch.dissem.bitmessage.entity.valueobject.Label;
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import ch.dissem.bitmessage.factory.Factory;
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import ch.dissem.bitmessage.utils.Decode;
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import ch.dissem.bitmessage.utils.Encode;
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import ch.dissem.bitmessage.utils.UnixTime;
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import java.io.*;
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import java.util.*;
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/**
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* The unencrypted message to be sent by 'msg' or 'broadcast'.
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*/
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public class Plaintext implements Streamable {
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private final Type type;
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private final BitmessageAddress from;
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private final long encoding;
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private final byte[] message;
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private final byte[] ack;
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private Object id;
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private InventoryVector inventoryVector;
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private BitmessageAddress to;
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private byte[] signature;
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private Status status;
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private Long sent;
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private Long received;
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private Set<Label> labels;
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private byte[] initialHash;
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private Plaintext(Builder builder) {
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id = builder.id;
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inventoryVector = builder.inventoryVector;
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type = builder.type;
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from = builder.from;
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to = builder.to;
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encoding = builder.encoding;
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message = builder.message;
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ack = builder.ack;
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signature = builder.signature;
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status = builder.status;
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sent = builder.sent;
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received = builder.received;
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labels = builder.labels;
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}
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public static Plaintext read(Type type, InputStream in) throws IOException {
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return readWithoutSignature(type, in)
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.signature(Decode.varBytes(in))
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.received(UnixTime.now())
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.build();
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}
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public static Plaintext.Builder readWithoutSignature(Type type, InputStream in) throws IOException {
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long version = Decode.varInt(in);
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return new Builder(type)
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.addressVersion(version)
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.stream(Decode.varInt(in))
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.behaviorBitfield(Decode.int32(in))
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.publicSigningKey(Decode.bytes(in, 64))
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.publicEncryptionKey(Decode.bytes(in, 64))
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.nonceTrialsPerByte(version >= 3 ? Decode.varInt(in) : 0)
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.extraBytes(version >= 3 ? Decode.varInt(in) : 0)
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.destinationRipe(type == Type.MSG ? Decode.bytes(in, 20) : null)
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.encoding(Decode.varInt(in))
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.message(Decode.varBytes(in))
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.ack(type == Type.MSG ? Decode.varBytes(in) : null);
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}
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public InventoryVector getInventoryVector() {
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return inventoryVector;
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}
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public void setInventoryVector(InventoryVector inventoryVector) {
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this.inventoryVector = inventoryVector;
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}
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public Type getType() {
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return type;
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}
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public byte[] getMessage() {
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return message;
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}
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public BitmessageAddress getFrom() {
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return from;
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}
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public BitmessageAddress getTo() {
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return to;
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}
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public void setTo(BitmessageAddress to) {
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if (this.to.getVersion() != 0)
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throw new RuntimeException("Correct address already set");
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if (!Arrays.equals(this.to.getRipe(), to.getRipe())) {
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throw new RuntimeException("RIPEs don't match");
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}
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this.to = to;
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}
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public Set<Label> getLabels() {
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return labels;
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}
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public long getStream() {
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return from.getStream();
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}
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public byte[] getSignature() {
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return signature;
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}
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public void setSignature(byte[] signature) {
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this.signature = signature;
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}
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public boolean isUnread() {
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for (Label label : labels) {
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if (label.getType() == Label.Type.UNREAD) {
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return true;
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}
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}
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return false;
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}
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public void write(OutputStream out, boolean includeSignature) throws IOException {
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Encode.varInt(from.getVersion(), out);
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Encode.varInt(from.getStream(), out);
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Encode.int32(from.getPubkey().getBehaviorBitfield(), out);
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out.write(from.getPubkey().getSigningKey(), 1, 64);
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out.write(from.getPubkey().getEncryptionKey(), 1, 64);
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if (from.getVersion() >= 3) {
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Encode.varInt(from.getPubkey().getNonceTrialsPerByte(), out);
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Encode.varInt(from.getPubkey().getExtraBytes(), out);
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}
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if (type == Type.MSG) {
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out.write(to.getRipe());
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}
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Encode.varInt(encoding, out);
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Encode.varInt(message.length, out);
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out.write(message);
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if (type == Type.MSG) {
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Encode.varInt(ack.length, out);
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out.write(ack);
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}
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if (includeSignature) {
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if (signature == null) {
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Encode.varInt(0, out);
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} else {
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Encode.varInt(signature.length, out);
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out.write(signature);
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}
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}
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}
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@Override
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public void write(OutputStream out) throws IOException {
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write(out, true);
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}
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public Object getId() {
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return id;
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}
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public void setId(long id) {
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if (this.id != null) throw new IllegalStateException("ID already set");
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this.id = id;
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}
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public Long getSent() {
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return sent;
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}
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public Long getReceived() {
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return received;
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}
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public Status getStatus() {
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return status;
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}
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public void setStatus(Status status) {
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this.status = status;
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}
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public String getSubject() {
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Scanner s = new Scanner(new ByteArrayInputStream(message), "UTF-8");
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String firstLine = s.nextLine();
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if (encoding == 2) {
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return firstLine.substring("Subject:".length()).trim();
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} else if (firstLine.length() > 50) {
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return firstLine.substring(0, 50).trim() + "...";
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} else {
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return firstLine;
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}
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}
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public String getText() {
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try {
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String text = new String(message, "UTF-8");
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if (encoding == 2) {
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return text.substring(text.indexOf("\nBody:") + 6);
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}
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return text;
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} catch (UnsupportedEncodingException e) {
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throw new RuntimeException(e);
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}
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}
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@Override
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public boolean equals(Object o) {
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if (this == o) return true;
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if (o == null || getClass() != o.getClass()) return false;
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Plaintext plaintext = (Plaintext) o;
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return Objects.equals(encoding, plaintext.encoding) &&
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Objects.equals(from, plaintext.from) &&
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Arrays.equals(message, plaintext.message) &&
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Arrays.equals(ack, plaintext.ack) &&
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Arrays.equals(to.getRipe(), plaintext.to.getRipe()) &&
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Arrays.equals(signature, plaintext.signature) &&
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Objects.equals(status, plaintext.status) &&
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Objects.equals(sent, plaintext.sent) &&
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Objects.equals(received, plaintext.received) &&
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Objects.equals(labels, plaintext.labels);
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}
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@Override
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public int hashCode() {
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return Objects.hash(from, encoding, message, ack, to, signature, status, sent, received, labels);
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}
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public void addLabels(Label... labels) {
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if (labels != null) {
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Collections.addAll(this.labels, labels);
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}
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}
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public void addLabels(Collection<Label> labels) {
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if (labels != null) {
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this.labels.addAll(labels);
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}
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}
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public void setInitialHash(byte[] initialHash) {
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this.initialHash = initialHash;
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}
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public byte[] getInitialHash() {
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return initialHash;
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}
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public enum Encoding {
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IGNORE(0), TRIVIAL(1), SIMPLE(2);
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long code;
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Encoding(long code) {
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this.code = code;
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}
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public long getCode() {
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return code;
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}
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}
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public enum Status {
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DRAFT,
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// For sent messages
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PUBKEY_REQUESTED,
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DOING_PROOF_OF_WORK,
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SENT,
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SENT_ACKNOWLEDGED,
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RECEIVED
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}
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public enum Type {
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MSG, BROADCAST
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}
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public static final class Builder {
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private Object id;
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private InventoryVector inventoryVector;
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private Type type;
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private BitmessageAddress from;
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private BitmessageAddress to;
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private long addressVersion;
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private long stream;
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private int behaviorBitfield;
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private byte[] publicSigningKey;
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private byte[] publicEncryptionKey;
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private long nonceTrialsPerByte;
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private long extraBytes;
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private byte[] destinationRipe;
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private long encoding;
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private byte[] message = new byte[0];
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private byte[] ack = new byte[0];
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private byte[] signature;
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private long sent;
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private long received;
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private Status status;
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private Set<Label> labels = new HashSet<>();
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public Builder(Type type) {
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this.type = type;
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}
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public Builder id(Object id) {
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this.id = id;
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return this;
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}
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public Builder IV(InventoryVector iv) {
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this.inventoryVector = iv;
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return this;
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}
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public Builder from(BitmessageAddress address) {
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from = address;
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return this;
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}
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public Builder to(BitmessageAddress address) {
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if (type != Type.MSG && to != null)
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throw new IllegalArgumentException("recipient address only allowed for msg");
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to = address;
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return this;
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}
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private Builder addressVersion(long addressVersion) {
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this.addressVersion = addressVersion;
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return this;
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}
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private Builder stream(long stream) {
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this.stream = stream;
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return this;
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}
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private Builder behaviorBitfield(int behaviorBitfield) {
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this.behaviorBitfield = behaviorBitfield;
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return this;
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}
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private Builder publicSigningKey(byte[] publicSigningKey) {
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this.publicSigningKey = publicSigningKey;
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return this;
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}
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private Builder publicEncryptionKey(byte[] publicEncryptionKey) {
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this.publicEncryptionKey = publicEncryptionKey;
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return this;
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}
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private Builder nonceTrialsPerByte(long nonceTrialsPerByte) {
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this.nonceTrialsPerByte = nonceTrialsPerByte;
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return this;
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}
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private Builder extraBytes(long extraBytes) {
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this.extraBytes = extraBytes;
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return this;
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}
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private Builder destinationRipe(byte[] ripe) {
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if (type != Type.MSG && ripe != null) throw new IllegalArgumentException("ripe only allowed for msg");
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this.destinationRipe = ripe;
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return this;
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}
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public Builder encoding(Encoding encoding) {
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this.encoding = encoding.getCode();
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return this;
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}
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private Builder encoding(long encoding) {
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this.encoding = encoding;
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return this;
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}
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public Builder message(String subject, String message) {
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try {
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this.encoding = Encoding.SIMPLE.getCode();
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this.message = ("Subject:" + subject + '\n' + "Body:" + message).getBytes("UTF-8");
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} catch (UnsupportedEncodingException e) {
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throw new RuntimeException(e);
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}
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return this;
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}
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public Builder message(byte[] message) {
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this.message = message;
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return this;
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}
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public Builder ack(byte[] ack) {
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if (type != Type.MSG && ack != null) throw new IllegalArgumentException("ack only allowed for msg");
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this.ack = ack;
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return this;
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}
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public Builder signature(byte[] signature) {
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this.signature = signature;
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return this;
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}
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public Builder sent(long sent) {
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this.sent = sent;
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return this;
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}
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public Builder received(long received) {
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this.received = received;
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return this;
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}
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public Builder status(Status status) {
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this.status = status;
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return this;
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}
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public Builder labels(Collection<Label> labels) {
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this.labels.addAll(labels);
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return this;
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}
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public Plaintext build() {
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if (from == null) {
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from = new BitmessageAddress(Factory.createPubkey(
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addressVersion,
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stream,
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publicSigningKey,
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publicEncryptionKey,
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nonceTrialsPerByte,
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extraBytes,
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behaviorBitfield
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));
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}
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if (to == null && type != Type.BROADCAST) {
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to = new BitmessageAddress(0, 0, destinationRipe);
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}
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return new Plaintext(this);
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}
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}
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}
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