org.whispersystems.libsignal.state.SignalProtocolStore Java Examples

public SignalServiceMessageSender(SignalServiceConfiguration urls,
                                  CredentialsProvider credentialsProvider,
                                  SignalProtocolStore store,
                                  String signalAgent,
                                  boolean isMultiDevice,
                                  boolean attachmentsV3,
                                  Optional<SignalServiceMessagePipe> pipe,
                                  Optional<SignalServiceMessagePipe> unidentifiedPipe,
                                  Optional<EventListener> eventListener,
                                  ClientZkProfileOperations clientZkProfileOperations,
                                  ExecutorService executor)
{
  this.socket           = new PushServiceSocket(urls, credentialsProvider, signalAgent, clientZkProfileOperations);
  this.store            = store;
  this.localAddress     = new SignalServiceAddress(credentialsProvider.getUuid(), credentialsProvider.getE164());
  this.pipe             = new AtomicReference<>(pipe);
  this.unidentifiedPipe = new AtomicReference<>(unidentifiedPipe);
  this.isMultiDevice    = new AtomicBoolean(isMultiDevice);
  this.attachmentsV3    = new AtomicBoolean(attachmentsV3);
  this.eventListener    = eventListener;
  this.executor         = executor != null ? executor : Executors.newSingleThreadExecutor();
}
 

private PreKeyBundle createBobPreKeyBundle(SignalProtocolStore bobStore) throws InvalidKeyException {
  ECKeyPair bobUnsignedPreKey   = Curve.generateKeyPair();
  int       bobUnsignedPreKeyId = new Random().nextInt(Medium.MAX_VALUE);
  byte[]    bobSignature        = Curve.calculateSignature(bobStore.getIdentityKeyPair().getPrivateKey(),
                                                           bobSignedPreKey.getPublicKey().serialize());

  PreKeyBundle bobPreKeyBundle = new PreKeyBundle(1, 1,
                                                  bobUnsignedPreKeyId, bobUnsignedPreKey.getPublicKey(),
                                                  bobSignedPreKeyId, bobSignedPreKey.getPublicKey(),
                                                  bobSignature, bobStore.getIdentityKeyPair().getPublicKey());

  bobStore.storeSignedPreKey(bobSignedPreKeyId, new SignedPreKeyRecord(bobSignedPreKeyId, System.currentTimeMillis(), bobSignedPreKey, bobSignature));
  bobStore.storePreKey(bobUnsignedPreKeyId, new PreKeyRecord(bobUnsignedPreKeyId, bobUnsignedPreKey));

  return bobPreKeyBundle;
}
 

private PreKeyBundle createAlicePreKeyBundle(SignalProtocolStore aliceStore) throws InvalidKeyException {
  ECKeyPair aliceUnsignedPreKey   = Curve.generateKeyPair();
  int       aliceUnsignedPreKeyId = new Random().nextInt(Medium.MAX_VALUE);
  byte[]    aliceSignature        = Curve.calculateSignature(aliceStore.getIdentityKeyPair().getPrivateKey(),
                                                             aliceSignedPreKey.getPublicKey().serialize());

  PreKeyBundle alicePreKeyBundle = new PreKeyBundle(1, 1,
                                                    aliceUnsignedPreKeyId, aliceUnsignedPreKey.getPublicKey(),
                                                    aliceSignedPreKeyId, aliceSignedPreKey.getPublicKey(),
                                                    aliceSignature, aliceStore.getIdentityKeyPair().getPublicKey());

  aliceStore.storeSignedPreKey(aliceSignedPreKeyId, new SignedPreKeyRecord(aliceSignedPreKeyId, System.currentTimeMillis(), aliceSignedPreKey, aliceSignature));
  aliceStore.storePreKey(aliceUnsignedPreKeyId, new PreKeyRecord(aliceUnsignedPreKeyId, aliceUnsignedPreKey));

  return alicePreKeyBundle;
}
 

public void testBasicPreKeyV2()
    throws InvalidKeyException, InvalidVersionException, InvalidMessageException, InvalidKeyIdException, DuplicateMessageException, LegacyMessageException, UntrustedIdentityException, NoSessionException {
  SignalProtocolStore aliceStore          = new TestInMemorySignalProtocolStore();
  SessionBuilder aliceSessionBuilder = new SessionBuilder(aliceStore, BOB_ADDRESS);

  SignalProtocolStore bobStore      = new TestInMemorySignalProtocolStore();
  ECKeyPair    bobPreKeyPair = Curve.generateKeyPair();
  PreKeyBundle bobPreKey     = new PreKeyBundle(bobStore.getLocalRegistrationId(), 1,
                                                31337, bobPreKeyPair.getPublicKey(),
                                                0, null, null,
                                                bobStore.getIdentityKeyPair().getPublicKey());

  try {
    aliceSessionBuilder.process(bobPreKey);
    throw new AssertionError("Should fail with missing unsigned prekey!");
  } catch (InvalidKeyException e) {
    // Good!
    return;
  }
}
 

public SignalServiceMessageSender(SignalServiceConfiguration urls,
                                  CredentialsProvider credentialsProvider,
                                  SignalProtocolStore store,
                                  String userAgent,
                                  boolean isMultiDevice,
                                  Optional<SignalServiceMessagePipe> pipe,
                                  Optional<SignalServiceMessagePipe> unidentifiedPipe,
                                  Optional<EventListener> eventListener)
{
  this.socket           = new PushServiceSocket(urls, credentialsProvider, userAgent);
  this.store            = store;
  this.localAddress     = new SignalServiceAddress(credentialsProvider.getUuid(), credentialsProvider.getE164());
  this.pipe             = new AtomicReference<>(pipe);
  this.unidentifiedPipe = new AtomicReference<>(unidentifiedPipe);
  this.isMultiDevice    = new AtomicBoolean(isMultiDevice);
  this.eventListener    = eventListener;
}
 

public void testRepeatBundleMessageV2() throws InvalidKeyException, UntrustedIdentityException, InvalidVersionException, InvalidMessageException, InvalidKeyIdException, DuplicateMessageException, LegacyMessageException, NoSessionException {
  SignalProtocolStore aliceStore          = new TestInMemorySignalProtocolStore();
  SessionBuilder aliceSessionBuilder = new SessionBuilder(aliceStore, BOB_ADDRESS);

  SignalProtocolStore bobStore = new TestInMemorySignalProtocolStore();

  ECKeyPair bobPreKeyPair            = Curve.generateKeyPair();
  ECKeyPair bobSignedPreKeyPair      = Curve.generateKeyPair();
  byte[]    bobSignedPreKeySignature = Curve.calculateSignature(bobStore.getIdentityKeyPair().getPrivateKey(),
                                                                bobSignedPreKeyPair.getPublicKey().serialize());

  PreKeyBundle bobPreKey = new PreKeyBundle(bobStore.getLocalRegistrationId(), 1,
                                            31337, bobPreKeyPair.getPublicKey(),
                                            0, null, null,
                                            bobStore.getIdentityKeyPair().getPublicKey());

  bobStore.storePreKey(31337, new PreKeyRecord(bobPreKey.getPreKeyId(), bobPreKeyPair));
  bobStore.storeSignedPreKey(22, new SignedPreKeyRecord(22, System.currentTimeMillis(), bobSignedPreKeyPair, bobSignedPreKeySignature));

  try {
    aliceSessionBuilder.process(bobPreKey);
    throw new AssertionError("Should fail with missing signed prekey!");
  } catch (InvalidKeyException e) {
    // Good!
    return;
  }
}
 

/**
 * Construct a SignalServiceMessageSender.
 *
 * @param urls The URL of the Signal Service.
 * @param uuid The Signal Service UUID.
 * @param e164 The Signal Service phone number.
 * @param password The Signal Service user password.
 * @param store The SignalProtocolStore.
 * @param eventListener An optional event listener, which fires whenever sessions are
 *                      setup or torn down for a recipient.
 */
public SignalServiceMessageSender(SignalServiceConfiguration urls,
                                  UUID uuid, String e164, String password,
                                  SignalProtocolStore store,
                                  String signalAgent,
                                  boolean isMultiDevice,
                                  boolean attachmentsV3,
                                  Optional<SignalServiceMessagePipe> pipe,
                                  Optional<SignalServiceMessagePipe> unidentifiedPipe,
                                  Optional<EventListener> eventListener,
                                  ClientZkProfileOperations clientZkProfileOperations,
                                  ExecutorService executor)
{
  this(urls, new StaticCredentialsProvider(uuid, e164, password, null), store, signalAgent, isMultiDevice, attachmentsV3, pipe, unidentifiedPipe, eventListener, clientZkProfileOperations, executor);
}
 

public SignalServiceCipher(SignalServiceAddress localAddress,
                           SignalProtocolStore signalProtocolStore,
                           CertificateValidator certificateValidator)
{
  this.signalProtocolStore  = signalProtocolStore;
  this.localAddress         = localAddress;
  this.certificateValidator = certificateValidator;
}
 

private static SignalProtocolAddress getPreferredProtocolAddress(SignalProtocolStore store, SignalServiceAddress address, int sourceDevice) {
  SignalProtocolAddress uuidAddress = address.getUuid().isPresent() ? new SignalProtocolAddress(address.getUuid().get().toString(), sourceDevice) : null;
  SignalProtocolAddress e164Address = address.getNumber().isPresent() ? new SignalProtocolAddress(address.getNumber().get(), sourceDevice) : null;

  if (uuidAddress != null && store.containsSession(uuidAddress)) {
    return uuidAddress;
  } else if (e164Address != null && store.containsSession(e164Address)) {
    return e164Address;
  } else {
    return new SignalProtocolAddress(address.getLegacyIdentifier(), sourceDevice);
  }
}
 

public void testMessageKeyLimits() throws Exception {
  SessionRecord aliceSessionRecord = new SessionRecord();
  SessionRecord bobSessionRecord   = new SessionRecord();

  initializeSessionsV3(aliceSessionRecord.getSessionState(), bobSessionRecord.getSessionState());

  SignalProtocolStore aliceStore = new TestInMemorySignalProtocolStore();
  SignalProtocolStore bobStore   = new TestInMemorySignalProtocolStore();

  aliceStore.storeSession(new SignalProtocolAddress("+14159999999", 1), aliceSessionRecord);
  bobStore.storeSession(new SignalProtocolAddress("+14158888888", 1), bobSessionRecord);

  SessionCipher     aliceCipher    = new SessionCipher(aliceStore, new SignalProtocolAddress("+14159999999", 1));
  SessionCipher     bobCipher      = new SessionCipher(bobStore, new SignalProtocolAddress("+14158888888", 1));

  List<CiphertextMessage> inflight = new LinkedList<>();

  for (int i=0;i<2010;i++) {
    inflight.add(aliceCipher.encrypt("you've never been so hungry, you've never been so cold".getBytes()));
  }

  bobCipher.decrypt(new SignalMessage(inflight.get(1000).serialize()));
  bobCipher.decrypt(new SignalMessage(inflight.get(inflight.size()-1).serialize()));

  try {
    bobCipher.decrypt(new SignalMessage(inflight.get(0).serialize()));
    throw new AssertionError("Should have failed!");
  } catch (DuplicateMessageException dme) {
    // good
  }
}
 

/**
 * Construct a SignalServiceMessageSender.
 *
 * @param urls The URL of the Signal Service.
 * @param uuid The Signal Service UUID.
 * @param e164 The Signal Service phone number.
 * @param password The Signal Service user password.
 * @param store The SignalProtocolStore.
 * @param eventListener An optional event listener, which fires whenever sessions are
 *                      setup or torn down for a recipient.
 */
public SignalServiceMessageSender(SignalServiceConfiguration urls,
                                  UUID uuid, String e164, String password,
                                  SignalProtocolStore store,
                                  String userAgent,
                                  boolean isMultiDevice,
                                  Optional<SignalServiceMessagePipe> pipe,
                                  Optional<SignalServiceMessagePipe> unidentifiedPipe,
                                  Optional<EventListener> eventListener)
{
  this(urls, new StaticCredentialsProvider(uuid, e164, password, null), store, userAgent, isMultiDevice, pipe, unidentifiedPipe, eventListener);
}
 

private static SignalProtocolAddress getPreferredProtocolAddress(SignalProtocolStore store, SignalServiceAddress address, int sourceDevice) {
  SignalProtocolAddress uuidAddress = address.getUuid().isPresent() ? new SignalProtocolAddress(address.getUuid().get().toString(), sourceDevice) : null;
  SignalProtocolAddress e164Address = address.getNumber().isPresent() ? new SignalProtocolAddress(address.getNumber().get(), sourceDevice) : null;

  if (uuidAddress != null && store.containsSession(uuidAddress)) {
    return uuidAddress;
  } else if (e164Address != null && store.containsSession(e164Address)) {
    return e164Address;
  } else {
    return new SignalProtocolAddress(address.getIdentifier(), sourceDevice);
  }
}
 

public SignalServiceCipher(SignalServiceAddress localAddress,
                           SignalProtocolStore signalProtocolStore,
                           CertificateValidator certificateValidator)
{
  this.signalProtocolStore  = signalProtocolStore;
  this.localAddress         = localAddress;
  this.certificateValidator = certificateValidator;
}
 

public void testOptionalOneTimePreKey() throws Exception {
  SignalProtocolStore aliceStore          = new TestInMemorySignalProtocolStore();
  SessionBuilder aliceSessionBuilder = new SessionBuilder(aliceStore, BOB_ADDRESS);

  SignalProtocolStore bobStore = new TestInMemorySignalProtocolStore();

  ECKeyPair bobPreKeyPair            = Curve.generateKeyPair();
  ECKeyPair bobSignedPreKeyPair      = Curve.generateKeyPair();
  byte[]    bobSignedPreKeySignature = Curve.calculateSignature(bobStore.getIdentityKeyPair().getPrivateKey(),
                                                                bobSignedPreKeyPair.getPublicKey().serialize());

  PreKeyBundle bobPreKey = new PreKeyBundle(bobStore.getLocalRegistrationId(), 1,
                                            0, null,
                                            22, bobSignedPreKeyPair.getPublicKey(),
                                            bobSignedPreKeySignature,
                                            bobStore.getIdentityKeyPair().getPublicKey());

  aliceSessionBuilder.process(bobPreKey);

  assertTrue(aliceStore.containsSession(BOB_ADDRESS));
  assertTrue(aliceStore.loadSession(BOB_ADDRESS).getSessionState().getSessionVersion() == 3);

  String            originalMessage    = "L'homme est condamné à être libre";
  SessionCipher     aliceSessionCipher = new SessionCipher(aliceStore, BOB_ADDRESS);
  CiphertextMessage outgoingMessage    = aliceSessionCipher.encrypt(originalMessage.getBytes());

  assertTrue(outgoingMessage.getType() == CiphertextMessage.PREKEY_TYPE);

  PreKeySignalMessage incomingMessage = new PreKeySignalMessage(outgoingMessage.serialize());
  assertTrue(!incomingMessage.getPreKeyId().isPresent());

  bobStore.storePreKey(31337, new PreKeyRecord(bobPreKey.getPreKeyId(), bobPreKeyPair));
  bobStore.storeSignedPreKey(22, new SignedPreKeyRecord(22, System.currentTimeMillis(), bobSignedPreKeyPair, bobSignedPreKeySignature));

  SessionCipher bobSessionCipher = new SessionCipher(bobStore, ALICE_ADDRESS);
  byte[]        plaintext        = bobSessionCipher.decrypt(incomingMessage);

  assertTrue(bobStore.containsSession(ALICE_ADDRESS));
  assertTrue(bobStore.loadSession(ALICE_ADDRESS).getSessionState().getSessionVersion() == 3);
  assertTrue(bobStore.loadSession(ALICE_ADDRESS).getSessionState().getAliceBaseKey() != null);
  assertTrue(originalMessage.equals(new String(plaintext)));
}
 

public SignalServiceCipher(SignalServiceAddress localAddress, SignalProtocolStore signalProtocolStore) {
  this.signalProtocolStore = signalProtocolStore;
  this.localAddress = localAddress;
}
 

private boolean isSessionIdEqual(SignalProtocolStore aliceStore, SignalProtocolStore bobStore) {
  return Arrays.equals(aliceStore.loadSession(BOB_ADDRESS).getSessionState().getAliceBaseKey(),
                       bobStore.loadSession(ALICE_ADDRESS).getSessionState().getAliceBaseKey());
}
 

public void testSimultaneousInitiateLostMessage()
      throws InvalidKeyException, UntrustedIdentityException, InvalidVersionException,
      InvalidMessageException, DuplicateMessageException, LegacyMessageException,
      InvalidKeyIdException, NoSessionException
  {
    SignalProtocolStore aliceStore = new TestInMemorySignalProtocolStore();
    SignalProtocolStore bobStore   = new TestInMemorySignalProtocolStore();

    PreKeyBundle alicePreKeyBundle = createAlicePreKeyBundle(aliceStore);
    PreKeyBundle bobPreKeyBundle = createBobPreKeyBundle(bobStore);

    SessionBuilder aliceSessionBuilder = new SessionBuilder(aliceStore, BOB_ADDRESS);
    SessionBuilder bobSessionBuilder   = new SessionBuilder(bobStore, ALICE_ADDRESS);

    SessionCipher aliceSessionCipher = new SessionCipher(aliceStore, BOB_ADDRESS);
    SessionCipher bobSessionCipher = new SessionCipher(bobStore, ALICE_ADDRESS);

    aliceSessionBuilder.process(bobPreKeyBundle);
    bobSessionBuilder.process(alicePreKeyBundle);

    CiphertextMessage messageForBob   = aliceSessionCipher.encrypt("hey there".getBytes());
    CiphertextMessage messageForAlice = bobSessionCipher.encrypt("sample message".getBytes());

    assertTrue(messageForBob.getType() == CiphertextMessage.PREKEY_TYPE);
    assertTrue(messageForAlice.getType() == CiphertextMessage.PREKEY_TYPE);

    assertFalse(isSessionIdEqual(aliceStore, bobStore));

    byte[] alicePlaintext = aliceSessionCipher.decrypt(new PreKeySignalMessage(messageForAlice.serialize()));
    byte[] bobPlaintext   = bobSessionCipher.decrypt(new PreKeySignalMessage(messageForBob.serialize()));

    assertTrue(new String(alicePlaintext).equals("sample message"));
    assertTrue(new String(bobPlaintext).equals("hey there"));

    assertTrue(aliceStore.loadSession(BOB_ADDRESS).getSessionState().getSessionVersion() == 3);
    assertTrue(bobStore.loadSession(ALICE_ADDRESS).getSessionState().getSessionVersion() == 3);

    assertFalse(isSessionIdEqual(aliceStore, bobStore));

    CiphertextMessage aliceResponse = aliceSessionCipher.encrypt("second message".getBytes());

    assertTrue(aliceResponse.getType() == CiphertextMessage.WHISPER_TYPE);

//    byte[] responsePlaintext = bobSessionCipher.decrypt(new WhisperMessage(aliceResponse.serialize()));
//
//    assertTrue(new String(responsePlaintext).equals("second message"));
//    assertTrue(isSessionIdEqual(aliceStore, bobStore));
    assertFalse(isSessionIdEqual(aliceStore, bobStore));

    CiphertextMessage finalMessage = bobSessionCipher.encrypt("third message".getBytes());

    assertTrue(finalMessage.getType() == CiphertextMessage.WHISPER_TYPE);

    byte[] finalPlaintext = aliceSessionCipher.decrypt(new SignalMessage(finalMessage.serialize()));

    assertTrue(new String(finalPlaintext).equals("third message"));
    assertTrue(isSessionIdEqual(aliceStore, bobStore));
  }
 

public void testBadMessageBundle() throws InvalidKeyException, UntrustedIdentityException, InvalidVersionException, InvalidMessageException, DuplicateMessageException, LegacyMessageException, InvalidKeyIdException {
  SignalProtocolStore aliceStore          = new TestInMemorySignalProtocolStore();
  SessionBuilder aliceSessionBuilder = new SessionBuilder(aliceStore, BOB_ADDRESS);

  SignalProtocolStore bobStore = new TestInMemorySignalProtocolStore();

  ECKeyPair bobPreKeyPair            = Curve.generateKeyPair();
  ECKeyPair bobSignedPreKeyPair      = Curve.generateKeyPair();
  byte[]    bobSignedPreKeySignature = Curve.calculateSignature(bobStore.getIdentityKeyPair().getPrivateKey(),
                                                                bobSignedPreKeyPair.getPublicKey().serialize());

  PreKeyBundle bobPreKey = new PreKeyBundle(bobStore.getLocalRegistrationId(), 1,
                                            31337, bobPreKeyPair.getPublicKey(),
                                            22, bobSignedPreKeyPair.getPublicKey(), bobSignedPreKeySignature,
                                            bobStore.getIdentityKeyPair().getPublicKey());

  bobStore.storePreKey(31337, new PreKeyRecord(bobPreKey.getPreKeyId(), bobPreKeyPair));
  bobStore.storeSignedPreKey(22, new SignedPreKeyRecord(22, System.currentTimeMillis(), bobSignedPreKeyPair, bobSignedPreKeySignature));

  aliceSessionBuilder.process(bobPreKey);

  String            originalMessage    = "L'homme est condamné à être libre";
  SessionCipher     aliceSessionCipher = new SessionCipher(aliceStore, BOB_ADDRESS);
  CiphertextMessage outgoingMessageOne = aliceSessionCipher.encrypt(originalMessage.getBytes());

  assertTrue(outgoingMessageOne.getType() == CiphertextMessage.PREKEY_TYPE);

  byte[] goodMessage = outgoingMessageOne.serialize();
  byte[] badMessage  = new byte[goodMessage.length];
  System.arraycopy(goodMessage, 0, badMessage, 0, badMessage.length);

  badMessage[badMessage.length-10] ^= 0x01;

  PreKeySignalMessage incomingMessage  = new PreKeySignalMessage(badMessage);
  SessionCipher        bobSessionCipher = new SessionCipher(bobStore, ALICE_ADDRESS);

  byte[] plaintext = new byte[0];

  try {
    plaintext = bobSessionCipher.decrypt(incomingMessage);
    throw new AssertionError("Decrypt should have failed!");
  } catch (InvalidMessageException e) {
    // good.
  }

  assertTrue(bobStore.containsPreKey(31337));

  plaintext = bobSessionCipher.decrypt(new PreKeySignalMessage(goodMessage));

  assertTrue(originalMessage.equals(new String(plaintext)));
  assertTrue(!bobStore.containsPreKey(31337));
}
 

public void testRepeatBundleMessageV3() throws InvalidKeyException, UntrustedIdentityException, InvalidVersionException, InvalidMessageException, InvalidKeyIdException, DuplicateMessageException, LegacyMessageException, NoSessionException {
  SignalProtocolStore aliceStore          = new TestInMemorySignalProtocolStore();
  SessionBuilder aliceSessionBuilder = new SessionBuilder(aliceStore, BOB_ADDRESS);

  SignalProtocolStore bobStore = new TestInMemorySignalProtocolStore();

  ECKeyPair bobPreKeyPair            = Curve.generateKeyPair();
  ECKeyPair bobSignedPreKeyPair      = Curve.generateKeyPair();
  byte[]    bobSignedPreKeySignature = Curve.calculateSignature(bobStore.getIdentityKeyPair().getPrivateKey(),
                                                                bobSignedPreKeyPair.getPublicKey().serialize());

  PreKeyBundle bobPreKey = new PreKeyBundle(bobStore.getLocalRegistrationId(), 1,
                                            31337, bobPreKeyPair.getPublicKey(),
                                            22, bobSignedPreKeyPair.getPublicKey(), bobSignedPreKeySignature,
                                            bobStore.getIdentityKeyPair().getPublicKey());

  bobStore.storePreKey(31337, new PreKeyRecord(bobPreKey.getPreKeyId(), bobPreKeyPair));
  bobStore.storeSignedPreKey(22, new SignedPreKeyRecord(22, System.currentTimeMillis(), bobSignedPreKeyPair, bobSignedPreKeySignature));

  aliceSessionBuilder.process(bobPreKey);

  String            originalMessage    = "L'homme est condamné à être libre";
  SessionCipher     aliceSessionCipher = new SessionCipher(aliceStore, BOB_ADDRESS);
  CiphertextMessage outgoingMessageOne = aliceSessionCipher.encrypt(originalMessage.getBytes());
  CiphertextMessage outgoingMessageTwo = aliceSessionCipher.encrypt(originalMessage.getBytes());

  assertTrue(outgoingMessageOne.getType() == CiphertextMessage.PREKEY_TYPE);
  assertTrue(outgoingMessageTwo.getType() == CiphertextMessage.PREKEY_TYPE);

  PreKeySignalMessage incomingMessage = new PreKeySignalMessage(outgoingMessageOne.serialize());

  SessionCipher bobSessionCipher = new SessionCipher(bobStore, ALICE_ADDRESS);

  byte[]        plaintext        = bobSessionCipher.decrypt(incomingMessage);
  assertTrue(originalMessage.equals(new String(plaintext)));

  CiphertextMessage bobOutgoingMessage = bobSessionCipher.encrypt(originalMessage.getBytes());

  byte[] alicePlaintext = aliceSessionCipher.decrypt(new SignalMessage(bobOutgoingMessage.serialize()));
  assertTrue(originalMessage.equals(new String(alicePlaintext)));

  // The test

  PreKeySignalMessage incomingMessageTwo = new PreKeySignalMessage(outgoingMessageTwo.serialize());

  plaintext = bobSessionCipher.decrypt(new PreKeySignalMessage(incomingMessageTwo.serialize()));
  assertTrue(originalMessage.equals(new String(plaintext)));

  bobOutgoingMessage = bobSessionCipher.encrypt(originalMessage.getBytes());
  alicePlaintext = aliceSessionCipher.decrypt(new SignalMessage(bobOutgoingMessage.serialize()));
  assertTrue(originalMessage.equals(new String(alicePlaintext)));

}
 

private void handleCorruptMessage(@NonNull MasterSecretUnion masterSecret,
                                  @NonNull SignalServiceProtos.Envelope envelope) {
    ALog.i(TAG, "handleCorruptMessage");

    ThreadRepo threadRepo = repository.getThreadRepo();
    String dataJson = threadRepo.getDecryptFailData(envelope.getSource());
    DecryptFailData data;
    if (dataJson != null && !dataJson.isEmpty()) {
        data = GsonUtils.INSTANCE.fromJson(dataJson, DecryptFailData.class);
    } else {
        data = new DecryptFailData();
    }
    if (data.getLastDeleteSessionTime() + 50000 < System.currentTimeMillis()) {
        ALog.i(TAG, "Last delete session time is 5s ago. Delete Session.");
        SignalProtocolStore store = new SignalProtocolStoreImpl(context, accountContext);
        SignalProtocolAddress address = new SignalProtocolAddress(envelope.getSource(), SignalServiceAddress.DEFAULT_DEVICE_ID);
        if (store.containsSession(address)) {
            store.deleteSession(address);
        }
        try {
            Optional<String> relay = Optional.absent();
            if (envelope.hasRelay()) {
                relay = Optional.of(envelope.getRelay());
            }
            List<PreKeyBundle> preKeyBundles = ChatHttp.INSTANCE.get(accountContext).getPreKeys(new SignalServiceAddress(envelope.getSource(), relay), SignalServiceAddress.DEFAULT_DEVICE_ID);
            for (PreKeyBundle preKey : preKeyBundles) {

                String identityKeyString = new String(EncryptUtils.base64Encode(preKey.getIdentityKey().serialize()));
                if (!AddressUtil.INSTANCE.isValid(envelope.getSource(), identityKeyString)) {
                    ALog.e(TAG, "getPreKeys error identity key got");
                    continue;
                }

                SessionBuilder sessionBuilder = new SessionBuilder(store, new SignalProtocolAddress(envelope.getSource(), SignalServiceAddress.DEFAULT_DEVICE_ID));
                sessionBuilder.process(preKey);

            }
        } catch (Throwable ex) {
            ALog.w(TAG, "Untrusted identity key from handleMismatchedDevices");
        }
        data.setLastDeleteSessionTime(System.currentTimeMillis());
        threadRepo.setDecryptFailData(envelope.getSource(), data.toJson());
    }

    //If the decryption fails, do not insert the library, and send a new receipt directly
    long messageId = envelope.getTimestamp();
    Recipient recipient = Recipient.from(accountContext, envelope.getSource(), false);
    String message = new AmeGroupMessage<>(AmeGroupMessage.RECEIPT, new AmeGroupMessage.ReceiptContent(messageId)).toString();
    OutgoingLocationMessage outgoingLocationMessage = new OutgoingLocationMessage(recipient, message, 0);
    if (masterSecret.getMasterSecret().isPresent()) {
        long threadId = threadRepo.getThreadIdIfExist(recipient);
        MessageSender.sendHideMessage(AppContextHolder.APP_CONTEXT, threadId, accountContext, AmeGroupMessage.RECEIPT, outgoingLocationMessage);
    }
}
 

public SessionCipher(SignalProtocolStore store, SignalProtocolAddress remoteAddress) {
  this(store, store, store, store, remoteAddress);
}
 

public MmsCipher(SignalProtocolStore axolotlStore) {
  this.axolotlStore = axolotlStore;
}
 

public SmsCipher(SignalProtocolStore signalProtocolStore) {
  this.signalProtocolStore = signalProtocolStore;
}
 

/**
 * Constructs a SessionBuilder
 * @param store The {@link SignalProtocolStore} to store all state information in.
 * @param remoteAddress The address of the remote user to build a session with.
 */
public SessionBuilder(SignalProtocolStore store, SignalProtocolAddress remoteAddress) {
  this(store, store, store, store, remoteAddress);
}
 

public void testBasicSimultaneousInitiate()
    throws InvalidKeyException, UntrustedIdentityException, InvalidVersionException,
    InvalidMessageException, DuplicateMessageException, LegacyMessageException,
    InvalidKeyIdException, NoSessionException
{
  SignalProtocolStore aliceStore = new TestInMemorySignalProtocolStore();
  SignalProtocolStore bobStore   = new TestInMemorySignalProtocolStore();

  PreKeyBundle alicePreKeyBundle = createAlicePreKeyBundle(aliceStore);
  PreKeyBundle bobPreKeyBundle = createBobPreKeyBundle(bobStore);

  SessionBuilder aliceSessionBuilder = new SessionBuilder(aliceStore, BOB_ADDRESS);
  SessionBuilder bobSessionBuilder   = new SessionBuilder(bobStore, ALICE_ADDRESS);

  SessionCipher aliceSessionCipher = new SessionCipher(aliceStore, BOB_ADDRESS);
  SessionCipher bobSessionCipher = new SessionCipher(bobStore, ALICE_ADDRESS);

  aliceSessionBuilder.process(bobPreKeyBundle);
  bobSessionBuilder.process(alicePreKeyBundle);

  CiphertextMessage messageForBob   = aliceSessionCipher.encrypt("hey there".getBytes());
  CiphertextMessage messageForAlice = bobSessionCipher.encrypt("sample message".getBytes());

  assertTrue(messageForBob.getType() == CiphertextMessage.PREKEY_TYPE);
  assertTrue(messageForAlice.getType() == CiphertextMessage.PREKEY_TYPE);

  assertFalse(isSessionIdEqual(aliceStore, bobStore));

  byte[] alicePlaintext = aliceSessionCipher.decrypt(new PreKeySignalMessage(messageForAlice.serialize()));
  byte[] bobPlaintext   = bobSessionCipher.decrypt(new PreKeySignalMessage(messageForBob.serialize()));

  assertTrue(new String(alicePlaintext).equals("sample message"));
  assertTrue(new String(bobPlaintext).equals("hey there"));

  assertTrue(aliceStore.loadSession(BOB_ADDRESS).getSessionState().getSessionVersion() == 3);
  assertTrue(bobStore.loadSession(ALICE_ADDRESS).getSessionState().getSessionVersion() == 3);

  assertFalse(isSessionIdEqual(aliceStore, bobStore));

  CiphertextMessage aliceResponse = aliceSessionCipher.encrypt("second message".getBytes());

  assertTrue(aliceResponse.getType() == CiphertextMessage.WHISPER_TYPE);

  byte[] responsePlaintext = bobSessionCipher.decrypt(new SignalMessage(aliceResponse.serialize()));

  assertTrue(new String(responsePlaintext).equals("second message"));
  assertTrue(isSessionIdEqual(aliceStore, bobStore));

  CiphertextMessage finalMessage = bobSessionCipher.encrypt("third message".getBytes());

  assertTrue(finalMessage.getType() == CiphertextMessage.WHISPER_TYPE);

  byte[] finalPlaintext = aliceSessionCipher.decrypt(new SignalMessage(finalMessage.serialize()));

  assertTrue(new String(finalPlaintext).equals("third message"));
  assertTrue(isSessionIdEqual(aliceStore, bobStore));
}
 

public void testLostSimultaneousInitiate() throws InvalidKeyException, UntrustedIdentityException, InvalidVersionException, InvalidMessageException, DuplicateMessageException, LegacyMessageException, InvalidKeyIdException, NoSessionException {
  SignalProtocolStore aliceStore = new TestInMemorySignalProtocolStore();
  SignalProtocolStore bobStore   = new TestInMemorySignalProtocolStore();

  PreKeyBundle alicePreKeyBundle = createAlicePreKeyBundle(aliceStore);
  PreKeyBundle bobPreKeyBundle = createBobPreKeyBundle(bobStore);

  SessionBuilder aliceSessionBuilder = new SessionBuilder(aliceStore, BOB_ADDRESS);
  SessionBuilder bobSessionBuilder   = new SessionBuilder(bobStore, ALICE_ADDRESS);

  SessionCipher aliceSessionCipher = new SessionCipher(aliceStore, BOB_ADDRESS);
  SessionCipher bobSessionCipher = new SessionCipher(bobStore, ALICE_ADDRESS);

  aliceSessionBuilder.process(bobPreKeyBundle);
  bobSessionBuilder.process(alicePreKeyBundle);

  CiphertextMessage messageForBob   = aliceSessionCipher.encrypt("hey there".getBytes());
  CiphertextMessage messageForAlice = bobSessionCipher.encrypt("sample message".getBytes());

  assertTrue(messageForBob.getType() == CiphertextMessage.PREKEY_TYPE);
  assertTrue(messageForAlice.getType() == CiphertextMessage.PREKEY_TYPE);

  assertFalse(isSessionIdEqual(aliceStore, bobStore));

  byte[] bobPlaintext   = bobSessionCipher.decrypt(new PreKeySignalMessage(messageForBob.serialize()));

  assertTrue(new String(bobPlaintext).equals("hey there"));
  assertTrue(bobStore.loadSession(ALICE_ADDRESS).getSessionState().getSessionVersion() == 3);

  CiphertextMessage aliceResponse = aliceSessionCipher.encrypt("second message".getBytes());

  assertTrue(aliceResponse.getType() == CiphertextMessage.PREKEY_TYPE);

  byte[] responsePlaintext = bobSessionCipher.decrypt(new PreKeySignalMessage(aliceResponse.serialize()));

  assertTrue(new String(responsePlaintext).equals("second message"));
  assertTrue(isSessionIdEqual(aliceStore, bobStore));

  CiphertextMessage finalMessage = bobSessionCipher.encrypt("third message".getBytes());

  assertTrue(finalMessage.getType() == CiphertextMessage.WHISPER_TYPE);

  byte[] finalPlaintext = aliceSessionCipher.decrypt(new SignalMessage(finalMessage.serialize()));

  assertTrue(new String(finalPlaintext).equals("third message"));
  assertTrue(isSessionIdEqual(aliceStore, bobStore));
}
 

public void testSimultaneousInitiateRepeatedMessages()
    throws InvalidKeyException, UntrustedIdentityException, InvalidVersionException,
    InvalidMessageException, DuplicateMessageException, LegacyMessageException,
    InvalidKeyIdException, NoSessionException
{
  SignalProtocolStore aliceStore = new TestInMemorySignalProtocolStore();
  SignalProtocolStore bobStore   = new TestInMemorySignalProtocolStore();

  PreKeyBundle alicePreKeyBundle = createAlicePreKeyBundle(aliceStore);
  PreKeyBundle bobPreKeyBundle = createBobPreKeyBundle(bobStore);

  SessionBuilder aliceSessionBuilder = new SessionBuilder(aliceStore, BOB_ADDRESS);
  SessionBuilder bobSessionBuilder   = new SessionBuilder(bobStore, ALICE_ADDRESS);

  SessionCipher aliceSessionCipher = new SessionCipher(aliceStore, BOB_ADDRESS);
  SessionCipher bobSessionCipher = new SessionCipher(bobStore, ALICE_ADDRESS);

  aliceSessionBuilder.process(bobPreKeyBundle);
  bobSessionBuilder.process(alicePreKeyBundle);

  CiphertextMessage messageForBob   = aliceSessionCipher.encrypt("hey there".getBytes());
  CiphertextMessage messageForAlice = bobSessionCipher.encrypt("sample message".getBytes());

  assertTrue(messageForBob.getType() == CiphertextMessage.PREKEY_TYPE);
  assertTrue(messageForAlice.getType() == CiphertextMessage.PREKEY_TYPE);

  assertFalse(isSessionIdEqual(aliceStore, bobStore));

  byte[] alicePlaintext = aliceSessionCipher.decrypt(new PreKeySignalMessage(messageForAlice.serialize()));
  byte[] bobPlaintext   = bobSessionCipher.decrypt(new PreKeySignalMessage(messageForBob.serialize()));

  assertTrue(new String(alicePlaintext).equals("sample message"));
  assertTrue(new String(bobPlaintext).equals("hey there"));

  assertTrue(aliceStore.loadSession(BOB_ADDRESS).getSessionState().getSessionVersion() == 3);
  assertTrue(bobStore.loadSession(ALICE_ADDRESS).getSessionState().getSessionVersion() == 3);

  assertFalse(isSessionIdEqual(aliceStore, bobStore));

  for (int i=0;i<50;i++) {
    CiphertextMessage messageForBobRepeat   = aliceSessionCipher.encrypt("hey there".getBytes());
    CiphertextMessage messageForAliceRepeat = bobSessionCipher.encrypt("sample message".getBytes());

    assertTrue(messageForBobRepeat.getType() == CiphertextMessage.WHISPER_TYPE);
    assertTrue(messageForAliceRepeat.getType() == CiphertextMessage.WHISPER_TYPE);

    assertFalse(isSessionIdEqual(aliceStore, bobStore));

    byte[] alicePlaintextRepeat = aliceSessionCipher.decrypt(new SignalMessage(messageForAliceRepeat.serialize()));
    byte[] bobPlaintextRepeat   = bobSessionCipher.decrypt(new SignalMessage(messageForBobRepeat.serialize()));

    assertTrue(new String(alicePlaintextRepeat).equals("sample message"));
    assertTrue(new String(bobPlaintextRepeat).equals("hey there"));

    assertFalse(isSessionIdEqual(aliceStore, bobStore));
  }

  CiphertextMessage aliceResponse = aliceSessionCipher.encrypt("second message".getBytes());

  assertTrue(aliceResponse.getType() == CiphertextMessage.WHISPER_TYPE);

  byte[] responsePlaintext = bobSessionCipher.decrypt(new SignalMessage(aliceResponse.serialize()));

  assertTrue(new String(responsePlaintext).equals("second message"));
  assertTrue(isSessionIdEqual(aliceStore, bobStore));

  CiphertextMessage finalMessage = bobSessionCipher.encrypt("third message".getBytes());

  assertTrue(finalMessage.getType() == CiphertextMessage.WHISPER_TYPE);

  byte[] finalPlaintext = aliceSessionCipher.decrypt(new SignalMessage(finalMessage.serialize()));

  assertTrue(new String(finalPlaintext).equals("third message"));
  assertTrue(isSessionIdEqual(aliceStore, bobStore));
}
 

public void testRepeatedSimultaneousInitiateRepeatedMessages()
    throws InvalidKeyException, UntrustedIdentityException, InvalidVersionException,
    InvalidMessageException, DuplicateMessageException, LegacyMessageException,
    InvalidKeyIdException, NoSessionException
{
  SignalProtocolStore aliceStore = new TestInMemorySignalProtocolStore();
  SignalProtocolStore bobStore   = new TestInMemorySignalProtocolStore();


  SessionBuilder aliceSessionBuilder = new SessionBuilder(aliceStore, BOB_ADDRESS);
  SessionBuilder bobSessionBuilder   = new SessionBuilder(bobStore, ALICE_ADDRESS);

  SessionCipher aliceSessionCipher = new SessionCipher(aliceStore, BOB_ADDRESS);
  SessionCipher bobSessionCipher = new SessionCipher(bobStore, ALICE_ADDRESS);

  for (int i=0;i<15;i++) {
    PreKeyBundle alicePreKeyBundle = createAlicePreKeyBundle(aliceStore);
    PreKeyBundle bobPreKeyBundle   = createBobPreKeyBundle(bobStore);

    aliceSessionBuilder.process(bobPreKeyBundle);
    bobSessionBuilder.process(alicePreKeyBundle);

    CiphertextMessage messageForBob = aliceSessionCipher.encrypt("hey there".getBytes());
    CiphertextMessage messageForAlice = bobSessionCipher.encrypt("sample message".getBytes());

    assertTrue(messageForBob.getType() == CiphertextMessage.PREKEY_TYPE);
    assertTrue(messageForAlice.getType() == CiphertextMessage.PREKEY_TYPE);

    assertFalse(isSessionIdEqual(aliceStore, bobStore));

    byte[] alicePlaintext = aliceSessionCipher.decrypt(new PreKeySignalMessage(messageForAlice.serialize()));
    byte[] bobPlaintext = bobSessionCipher.decrypt(new PreKeySignalMessage(messageForBob.serialize()));

    assertTrue(new String(alicePlaintext).equals("sample message"));
    assertTrue(new String(bobPlaintext).equals("hey there"));

    assertTrue(aliceStore.loadSession(BOB_ADDRESS).getSessionState().getSessionVersion() == 3);
    assertTrue(bobStore.loadSession(ALICE_ADDRESS).getSessionState().getSessionVersion() == 3);

    assertFalse(isSessionIdEqual(aliceStore, bobStore));
  }

  for (int i=0;i<50;i++) {
    CiphertextMessage messageForBobRepeat   = aliceSessionCipher.encrypt("hey there".getBytes());
    CiphertextMessage messageForAliceRepeat = bobSessionCipher.encrypt("sample message".getBytes());

    assertTrue(messageForBobRepeat.getType() == CiphertextMessage.WHISPER_TYPE);
    assertTrue(messageForAliceRepeat.getType() == CiphertextMessage.WHISPER_TYPE);

    assertFalse(isSessionIdEqual(aliceStore, bobStore));

    byte[] alicePlaintextRepeat = aliceSessionCipher.decrypt(new SignalMessage(messageForAliceRepeat.serialize()));
    byte[] bobPlaintextRepeat   = bobSessionCipher.decrypt(new SignalMessage(messageForBobRepeat.serialize()));

    assertTrue(new String(alicePlaintextRepeat).equals("sample message"));
    assertTrue(new String(bobPlaintextRepeat).equals("hey there"));

    assertFalse(isSessionIdEqual(aliceStore, bobStore));
  }

  CiphertextMessage aliceResponse = aliceSessionCipher.encrypt("second message".getBytes());

  assertTrue(aliceResponse.getType() == CiphertextMessage.WHISPER_TYPE);

  byte[] responsePlaintext = bobSessionCipher.decrypt(new SignalMessage(aliceResponse.serialize()));

  assertTrue(new String(responsePlaintext).equals("second message"));
  assertTrue(isSessionIdEqual(aliceStore, bobStore));

  CiphertextMessage finalMessage = bobSessionCipher.encrypt("third message".getBytes());

  assertTrue(finalMessage.getType() == CiphertextMessage.WHISPER_TYPE);

  byte[] finalPlaintext = aliceSessionCipher.decrypt(new SignalMessage(finalMessage.serialize()));

  assertTrue(new String(finalPlaintext).equals("third message"));
  assertTrue(isSessionIdEqual(aliceStore, bobStore));
}
 

public void testRepeatedSimultaneousInitiateLostMessageRepeatedMessages()
      throws InvalidKeyException, UntrustedIdentityException, InvalidVersionException,
      InvalidMessageException, DuplicateMessageException, LegacyMessageException,
      InvalidKeyIdException, NoSessionException
  {
    SignalProtocolStore aliceStore = new TestInMemorySignalProtocolStore();
    SignalProtocolStore bobStore   = new TestInMemorySignalProtocolStore();


    SessionBuilder aliceSessionBuilder = new SessionBuilder(aliceStore, BOB_ADDRESS);
    SessionBuilder bobSessionBuilder   = new SessionBuilder(bobStore, ALICE_ADDRESS);

    SessionCipher aliceSessionCipher = new SessionCipher(aliceStore, BOB_ADDRESS);
    SessionCipher bobSessionCipher = new SessionCipher(bobStore, ALICE_ADDRESS);

//    PreKeyBundle aliceLostPreKeyBundle = createAlicePreKeyBundle(aliceStore);
    PreKeyBundle bobLostPreKeyBundle   = createBobPreKeyBundle(bobStore);

    aliceSessionBuilder.process(bobLostPreKeyBundle);
//    bobSessionBuilder.process(aliceLostPreKeyBundle);

    CiphertextMessage lostMessageForBob   = aliceSessionCipher.encrypt("hey there".getBytes());
//    CiphertextMessage lostMessageForAlice = bobSessionCipher.encrypt("sample message".getBytes());

    for (int i=0;i<15;i++) {
      PreKeyBundle alicePreKeyBundle = createAlicePreKeyBundle(aliceStore);
      PreKeyBundle bobPreKeyBundle   = createBobPreKeyBundle(bobStore);

      aliceSessionBuilder.process(bobPreKeyBundle);
      bobSessionBuilder.process(alicePreKeyBundle);

      CiphertextMessage messageForBob = aliceSessionCipher.encrypt("hey there".getBytes());
      CiphertextMessage messageForAlice = bobSessionCipher.encrypt("sample message".getBytes());

      assertTrue(messageForBob.getType() == CiphertextMessage.PREKEY_TYPE);
      assertTrue(messageForAlice.getType() == CiphertextMessage.PREKEY_TYPE);

      assertFalse(isSessionIdEqual(aliceStore, bobStore));

      byte[] alicePlaintext = aliceSessionCipher.decrypt(new PreKeySignalMessage(messageForAlice.serialize()));
      byte[] bobPlaintext = bobSessionCipher.decrypt(new PreKeySignalMessage(messageForBob.serialize()));

      assertTrue(new String(alicePlaintext).equals("sample message"));
      assertTrue(new String(bobPlaintext).equals("hey there"));

      assertTrue(aliceStore.loadSession(BOB_ADDRESS).getSessionState().getSessionVersion() == 3);
      assertTrue(bobStore.loadSession(ALICE_ADDRESS).getSessionState().getSessionVersion() == 3);

      assertFalse(isSessionIdEqual(aliceStore, bobStore));
    }

    for (int i=0;i<50;i++) {
      CiphertextMessage messageForBobRepeat   = aliceSessionCipher.encrypt("hey there".getBytes());
      CiphertextMessage messageForAliceRepeat = bobSessionCipher.encrypt("sample message".getBytes());

      assertTrue(messageForBobRepeat.getType() == CiphertextMessage.WHISPER_TYPE);
      assertTrue(messageForAliceRepeat.getType() == CiphertextMessage.WHISPER_TYPE);

      assertFalse(isSessionIdEqual(aliceStore, bobStore));

      byte[] alicePlaintextRepeat = aliceSessionCipher.decrypt(new SignalMessage(messageForAliceRepeat.serialize()));
      byte[] bobPlaintextRepeat   = bobSessionCipher.decrypt(new SignalMessage(messageForBobRepeat.serialize()));

      assertTrue(new String(alicePlaintextRepeat).equals("sample message"));
      assertTrue(new String(bobPlaintextRepeat).equals("hey there"));

      assertFalse(isSessionIdEqual(aliceStore, bobStore));
    }

    CiphertextMessage aliceResponse = aliceSessionCipher.encrypt("second message".getBytes());

    assertTrue(aliceResponse.getType() == CiphertextMessage.WHISPER_TYPE);

    byte[] responsePlaintext = bobSessionCipher.decrypt(new SignalMessage(aliceResponse.serialize()));

    assertTrue(new String(responsePlaintext).equals("second message"));
    assertTrue(isSessionIdEqual(aliceStore, bobStore));

    CiphertextMessage finalMessage = bobSessionCipher.encrypt("third message".getBytes());

    assertTrue(finalMessage.getType() == CiphertextMessage.WHISPER_TYPE);

    byte[] finalPlaintext = aliceSessionCipher.decrypt(new SignalMessage(finalMessage.serialize()));

    assertTrue(new String(finalPlaintext).equals("third message"));
    assertTrue(isSessionIdEqual(aliceStore, bobStore));

    byte[] lostMessagePlaintext = bobSessionCipher.decrypt(new PreKeySignalMessage(lostMessageForBob.serialize()));
    assertTrue(new String(lostMessagePlaintext).equals("hey there"));

    assertFalse(isSessionIdEqual(aliceStore, bobStore));

    CiphertextMessage blastFromThePast          = bobSessionCipher.encrypt("unexpected!".getBytes());
    byte[]            blastFromThePastPlaintext = aliceSessionCipher.decrypt(new SignalMessage(blastFromThePast.serialize()));

    assertTrue(new String(blastFromThePastPlaintext).equals("unexpected!"));
    assertTrue(isSessionIdEqual(aliceStore, bobStore));
  }
 

/**
 * Constructs a SessionBuilder
 * @param store The {@link SignalProtocolStore} to store all state information in.
 * @param remoteAddress The address of the remote user to build a session with.
 */
public SessionBuilder(SignalProtocolStore store, SignalProtocolAddress remoteAddress) {
  this(store, store, store, store, remoteAddress);
}