125 lines
3.4 KiB
Java
125 lines
3.4 KiB
Java
/**
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* Copyright (C) 2014-2016 Open Whisper Systems
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*
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* Licensed according to the LICENSE file in this repository.
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*/
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package org.session.libsignal.messages;
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import com.google.protobuf.ByteString;
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import org.session.libsignal.utilities.SignalServiceAddress;
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import org.session.libsignal.protos.SignalServiceProtos.Envelope;
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/**
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* This class represents an encrypted Signal Service envelope.
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*
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* The envelope contains the wrapping information, such as the sender, the
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* message timestamp, the encrypted message type, etc.
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*
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* @author Moxie Marlinspike
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*/
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public class SignalServiceEnvelope {
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private final Envelope envelope;
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public SignalServiceEnvelope(Envelope proto) {
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Envelope.Builder builder = Envelope.newBuilder();
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builder.setType(Envelope.Type.valueOf(proto.getType().getNumber()));
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if (proto.getSource() != null) {
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builder.setSource(proto.getSource());
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}
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if (proto.getSourceDevice() > 0) {
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builder.setSourceDevice(proto.getSourceDevice());
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}
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builder.setTimestamp(proto.getTimestamp());
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builder.setServerTimestamp(proto.getServerTimestamp());
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if (proto.getContent() != null) {
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builder.setContent(ByteString.copyFrom(proto.getContent().toByteArray()));
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}
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this.envelope = builder.build();
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}
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public SignalServiceEnvelope(int type, String sender, int senderDevice, long timestamp, byte[] content, long serverTimestamp) {
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Envelope.Builder builder = Envelope.newBuilder()
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.setType(Envelope.Type.valueOf(type))
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.setSource(sender)
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.setSourceDevice(senderDevice)
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.setTimestamp(timestamp)
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.setServerTimestamp(serverTimestamp);
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if (content != null) builder.setContent(ByteString.copyFrom(content));
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this.envelope = builder.build();
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}
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public boolean hasSource() {
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return envelope.hasSource() && envelope.getSource().length() > 0;
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}
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/**
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* @return The envelope's sender.
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*/
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public String getSource() {
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return envelope.getSource();
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}
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public boolean hasSourceDevice() {
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return envelope.hasSourceDevice();
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}
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/**
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* @return The envelope's sender device ID.
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*/
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public int getSourceDevice() {
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return envelope.getSourceDevice();
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}
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/**
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* @return The envelope's sender as a SignalServiceAddress.
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*/
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public SignalServiceAddress getSourceAddress() {
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return new SignalServiceAddress(envelope.getSource());
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}
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/**
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* @return The envelope content type.
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*/
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public int getType() {
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return envelope.getType().getNumber();
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}
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/**
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* @return The timestamp this envelope was sent.
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*/
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public long getTimestamp() {
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return envelope.getTimestamp();
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}
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public long getServerTimestamp() {
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return envelope.getServerTimestamp();
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}
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/**
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* @return Whether the envelope contains an encrypted SignalServiceContent
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*/
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public boolean hasContent() {
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return envelope.hasContent();
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}
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/**
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* @return The envelope's encrypted SignalServiceContent.
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*/
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public byte[] getContent() {
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return envelope.getContent().toByteArray();
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}
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public boolean isUnidentifiedSender() {
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return envelope.getType().getNumber() == Envelope.Type.SESSION_MESSAGE_VALUE;
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}
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public boolean isClosedGroupCiphertext() {
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return envelope.getType().getNumber() == Envelope.Type.CLOSED_GROUP_MESSAGE_VALUE;
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}
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}
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