public void testBadMessageBundle()
{
AxolotlStore aliceStore = new TestInMemoryAxolotlStore();
SessionBuilder aliceSessionBuilder = new SessionBuilder(aliceStore, BOB_ADDRESS);
AxolotlStore bobStore = new TestInMemoryAxolotlStore();
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, DateUtil.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(Encoding.UTF8.GetBytes(originalMessage));
Assert.AreEqual(CiphertextMessage.PREKEY_TYPE, outgoingMessageOne.getType());
byte[] goodMessage = outgoingMessageOne.serialize();
byte[] badMessage = new byte[goodMessage.Length];
Array.Copy(goodMessage, 0, badMessage, 0, badMessage.Length);
badMessage[badMessage.Length - 10] ^= 0x01;
PreKeyWhisperMessage incomingMessage = new PreKeyWhisperMessage(badMessage);
SessionCipher bobSessionCipher = new SessionCipher(bobStore, ALICE_ADDRESS);
byte[] plaintext = new byte[0];
try
{
plaintext = bobSessionCipher.decrypt(incomingMessage);
throw new Exception("Decrypt should have failed!");
}
catch (InvalidMessageException e)
{
// good.
}
Assert.IsTrue(bobStore.ContainsPreKey(31337));
plaintext = bobSessionCipher.decrypt(new PreKeyWhisperMessage(goodMessage));
Assert.AreEqual(originalMessage, Encoding.UTF8.GetString(plaintext));
Assert.IsFalse(bobStore.ContainsPreKey(31337));
}
public void testRepeatBundleMessageV3()
{
AxolotlStore aliceStore = new TestInMemoryAxolotlStore();
SessionBuilder aliceSessionBuilder = new SessionBuilder(aliceStore, BOB_ADDRESS);
AxolotlStore bobStore = new TestInMemoryAxolotlStore();
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, DateUtil.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(Encoding.UTF8.GetBytes(originalMessage));
CiphertextMessage outgoingMessageTwo = aliceSessionCipher.encrypt(Encoding.UTF8.GetBytes(originalMessage));
Assert.AreEqual(CiphertextMessage.PREKEY_TYPE, outgoingMessageOne.getType());
Assert.AreEqual(CiphertextMessage.PREKEY_TYPE, outgoingMessageTwo.getType());
PreKeyWhisperMessage incomingMessage = new PreKeyWhisperMessage(outgoingMessageOne.serialize());
SessionCipher bobSessionCipher = new SessionCipher(bobStore, ALICE_ADDRESS);
byte[] plaintext = bobSessionCipher.decrypt(incomingMessage);
Assert.AreEqual(originalMessage, Encoding.UTF8.GetString(plaintext));
CiphertextMessage bobOutgoingMessage = bobSessionCipher.encrypt(Encoding.UTF8.GetBytes(originalMessage));
byte[] alicePlaintext = aliceSessionCipher.decrypt(new WhisperMessage(bobOutgoingMessage.serialize()));
Assert.AreEqual(originalMessage, Encoding.UTF8.GetString(alicePlaintext));
// The test
PreKeyWhisperMessage incomingMessageTwo = new PreKeyWhisperMessage(outgoingMessageTwo.serialize());
plaintext = bobSessionCipher.decrypt(new PreKeyWhisperMessage(incomingMessageTwo.serialize()));
Assert.AreEqual(originalMessage, Encoding.UTF8.GetString(plaintext));
bobOutgoingMessage = bobSessionCipher.encrypt(Encoding.UTF8.GetBytes(originalMessage));
alicePlaintext = aliceSessionCipher.decrypt(new WhisperMessage(bobOutgoingMessage.serialize()));
Assert.AreEqual(originalMessage, Encoding.UTF8.GetString(alicePlaintext));
}
public void testOptionalOneTimePreKey()
{
AxolotlStore aliceStore = new TestInMemoryAxolotlStore();
SessionBuilder aliceSessionBuilder = new SessionBuilder(aliceStore, BOB_ADDRESS);
AxolotlStore bobStore = new TestInMemoryAxolotlStore();
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);
Assert.IsTrue(aliceStore.ContainsSession(BOB_ADDRESS));
Assert.AreEqual((uint)3, aliceStore.LoadSession(BOB_ADDRESS).getSessionState().getSessionVersion());
String originalMessage = "L'homme est condamné à être libre";
SessionCipher aliceSessionCipher = new SessionCipher(aliceStore, BOB_ADDRESS);
CiphertextMessage outgoingMessage = aliceSessionCipher.encrypt(Encoding.UTF8.GetBytes(originalMessage));
Assert.AreEqual(outgoingMessage.getType(), CiphertextMessage.PREKEY_TYPE);
PreKeyWhisperMessage incomingMessage = new PreKeyWhisperMessage(outgoingMessage.serialize());
Assert.IsFalse(incomingMessage.getPreKeyId().HasValue);
bobStore.StorePreKey(31337, new PreKeyRecord(bobPreKey.getPreKeyId(), bobPreKeyPair));
bobStore.StoreSignedPreKey(22, new SignedPreKeyRecord(22, DateUtil.currentTimeMillis(), bobSignedPreKeyPair, bobSignedPreKeySignature));
SessionCipher bobSessionCipher = new SessionCipher(bobStore, ALICE_ADDRESS);
byte[] plaintext = bobSessionCipher.decrypt(incomingMessage);
Assert.IsTrue(bobStore.ContainsSession(ALICE_ADDRESS));
Assert.AreEqual((uint)3, bobStore.LoadSession(ALICE_ADDRESS).getSessionState().getSessionVersion());
Assert.IsNotNull(bobStore.LoadSession(ALICE_ADDRESS).getSessionState().getAliceBaseKey());
Assert.AreEqual(originalMessage, Encoding.UTF8.GetString(plaintext));
}
public void testBasicPreKeyV2()
{
AxolotlStore aliceStore = new TestInMemoryAxolotlStore();
SessionBuilder aliceSessionBuilder = new SessionBuilder(aliceStore, BOB_ADDRESS);
AxolotlStore bobStore = new TestInMemoryAxolotlStore();
ECKeyPair bobPreKeyPair = Curve.generateKeyPair();
PreKeyBundle bobPreKey = new PreKeyBundle(bobStore.GetLocalRegistrationId(), 1,
31337, bobPreKeyPair.getPublicKey(),
0, null, null,
bobStore.GetIdentityKeyPair().getPublicKey());
aliceSessionBuilder.process(bobPreKey);
Assert.IsTrue(aliceStore.ContainsSession(BOB_ADDRESS));
Assert.AreEqual((uint)2, aliceStore.LoadSession(BOB_ADDRESS).getSessionState().getSessionVersion());
String originalMessage = "L'homme est condamné à être libre";
SessionCipher aliceSessionCipher = new SessionCipher(aliceStore, BOB_ADDRESS);
CiphertextMessage outgoingMessage = aliceSessionCipher.encrypt(Encoding.UTF8.GetBytes(originalMessage));
Assert.AreEqual(CiphertextMessage.PREKEY_TYPE, outgoingMessage.getType());
PreKeyWhisperMessage incomingMessage = new PreKeyWhisperMessage(outgoingMessage.serialize());
bobStore.StorePreKey(31337, new PreKeyRecord(bobPreKey.getPreKeyId(), bobPreKeyPair));
SessionCipher bobSessionCipher = new SessionCipher(bobStore, ALICE_ADDRESS);
byte[] plaintext = bobSessionCipher.decrypt(incomingMessage);
Assert.IsTrue(bobStore.ContainsSession(ALICE_ADDRESS));
Assert.AreEqual((uint)2, bobStore.LoadSession(ALICE_ADDRESS).getSessionState().getSessionVersion());
Assert.AreEqual(originalMessage, Encoding.UTF8.GetString(plaintext));
CiphertextMessage bobOutgoingMessage = bobSessionCipher.encrypt(Encoding.UTF8.GetBytes(originalMessage));
Assert.AreEqual(CiphertextMessage.WHISPER_TYPE, bobOutgoingMessage.getType());
byte[] alicePlaintext = aliceSessionCipher.decrypt((WhisperMessage)bobOutgoingMessage);
Assert.AreEqual(originalMessage, Encoding.UTF8.GetString(alicePlaintext));
runInteraction(aliceStore, bobStore);
aliceStore = new TestInMemoryAxolotlStore();
aliceSessionBuilder = new SessionBuilder(aliceStore, BOB_ADDRESS);
aliceSessionCipher = new SessionCipher(aliceStore, BOB_ADDRESS);
bobPreKeyPair = Curve.generateKeyPair();
bobPreKey = new PreKeyBundle(bobStore.GetLocalRegistrationId(),
1, 31338, bobPreKeyPair.getPublicKey(),
0, null, null, bobStore.GetIdentityKeyPair().getPublicKey());
bobStore.StorePreKey(31338, new PreKeyRecord(bobPreKey.getPreKeyId(), bobPreKeyPair));
aliceSessionBuilder.process(bobPreKey);
outgoingMessage = aliceSessionCipher.encrypt(Encoding.UTF8.GetBytes(originalMessage));
try
{
bobSessionCipher.decrypt(new PreKeyWhisperMessage(outgoingMessage.serialize()));
throw new Exception("shouldn't be trusted!");
}
catch (UntrustedIdentityException uie)
{
bobStore.SaveIdentity(ALICE_ADDRESS.getName(), new PreKeyWhisperMessage(outgoingMessage.serialize()).getIdentityKey());
}
plaintext = bobSessionCipher.decrypt(new PreKeyWhisperMessage(outgoingMessage.serialize()));
Assert.AreEqual(originalMessage, Encoding.UTF8.GetString(plaintext));
bobPreKey = new PreKeyBundle(bobStore.GetLocalRegistrationId(), 1,
31337, Curve.generateKeyPair().getPublicKey(),
0, null, null,
aliceStore.GetIdentityKeyPair().getPublicKey());
try
{
aliceSessionBuilder.process(bobPreKey);
throw new Exception("shoulnd't be trusted!");
}
catch (UntrustedIdentityException uie)
{
// good
}
}
public void testOptionalOneTimePreKey()
{
AxolotlStore aliceStore = new TestInMemoryAxolotlStore();
SessionBuilder aliceSessionBuilder = new SessionBuilder(aliceStore, BOB_ADDRESS);
AxolotlStore bobStore = new TestInMemoryAxolotlStore();
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);
Assert.IsTrue(aliceStore.ContainsSession(BOB_ADDRESS));
Assert.AreEqual((uint)3, aliceStore.LoadSession(BOB_ADDRESS).getSessionState().getSessionVersion());
String originalMessage = "L'homme est condamné à être libre";
SessionCipher aliceSessionCipher = new SessionCipher(aliceStore, BOB_ADDRESS);
CiphertextMessage outgoingMessage = aliceSessionCipher.encrypt(Encoding.UTF8.GetBytes(originalMessage));
Assert.AreEqual(outgoingMessage.getType(), CiphertextMessage.PREKEY_TYPE);
PreKeyWhisperMessage incomingMessage = new PreKeyWhisperMessage(outgoingMessage.serialize());
Assert.IsFalse(incomingMessage.getPreKeyId().HasValue);
bobStore.StorePreKey(31337, new PreKeyRecord(bobPreKey.getPreKeyId(), bobPreKeyPair));
bobStore.StoreSignedPreKey(22, new SignedPreKeyRecord(22, DateUtil.currentTimeMillis(), bobSignedPreKeyPair, bobSignedPreKeySignature));
SessionCipher bobSessionCipher = new SessionCipher(bobStore, ALICE_ADDRESS);
byte[] plaintext = bobSessionCipher.decrypt(incomingMessage);
Assert.IsTrue(bobStore.ContainsSession(ALICE_ADDRESS));
Assert.AreEqual((uint)3, bobStore.LoadSession(ALICE_ADDRESS).getSessionState().getSessionVersion());
Assert.IsNotNull(bobStore.LoadSession(ALICE_ADDRESS).getSessionState().getAliceBaseKey());
Assert.AreEqual(originalMessage, Encoding.UTF8.GetString(plaintext));
}
public void testBasicPreKeyV2()
{
AxolotlStore aliceStore = new TestInMemoryAxolotlStore();
SessionBuilder aliceSessionBuilder = new SessionBuilder(aliceStore, BOB_ADDRESS);
AxolotlStore bobStore = new TestInMemoryAxolotlStore();
ECKeyPair bobPreKeyPair = Curve.generateKeyPair();
PreKeyBundle bobPreKey = new PreKeyBundle(bobStore.GetLocalRegistrationId(), 1,
31337, bobPreKeyPair.getPublicKey(),
0, null, null,
bobStore.GetIdentityKeyPair().getPublicKey());
aliceSessionBuilder.process(bobPreKey);
Assert.IsTrue(aliceStore.ContainsSession(BOB_ADDRESS));
Assert.AreEqual((uint)2, aliceStore.LoadSession(BOB_ADDRESS).getSessionState().getSessionVersion());
String originalMessage = "L'homme est condamné à être libre";
SessionCipher aliceSessionCipher = new SessionCipher(aliceStore, BOB_ADDRESS);
CiphertextMessage outgoingMessage = aliceSessionCipher.encrypt(Encoding.UTF8.GetBytes(originalMessage));
Assert.AreEqual(CiphertextMessage.PREKEY_TYPE, outgoingMessage.getType());
PreKeyWhisperMessage incomingMessage = new PreKeyWhisperMessage(outgoingMessage.serialize());
bobStore.StorePreKey(31337, new PreKeyRecord(bobPreKey.getPreKeyId(), bobPreKeyPair));
SessionCipher bobSessionCipher = new SessionCipher(bobStore, ALICE_ADDRESS);
byte[] plaintext = bobSessionCipher.decrypt(incomingMessage);
Assert.IsTrue(bobStore.ContainsSession(ALICE_ADDRESS));
Assert.AreEqual((uint)2, bobStore.LoadSession(ALICE_ADDRESS).getSessionState().getSessionVersion());
Assert.AreEqual(originalMessage, Encoding.UTF8.GetString(plaintext));
CiphertextMessage bobOutgoingMessage = bobSessionCipher.encrypt(Encoding.UTF8.GetBytes(originalMessage));
Assert.AreEqual(CiphertextMessage.WHISPER_TYPE, bobOutgoingMessage.getType());
byte[] alicePlaintext = aliceSessionCipher.decrypt((WhisperMessage)bobOutgoingMessage);
Assert.AreEqual(originalMessage, Encoding.UTF8.GetString(alicePlaintext));
runInteraction(aliceStore, bobStore);
aliceStore = new TestInMemoryAxolotlStore();
aliceSessionBuilder = new SessionBuilder(aliceStore, BOB_ADDRESS);
aliceSessionCipher = new SessionCipher(aliceStore, BOB_ADDRESS);
bobPreKeyPair = Curve.generateKeyPair();
bobPreKey = new PreKeyBundle(bobStore.GetLocalRegistrationId(),
1, 31338, bobPreKeyPair.getPublicKey(),
0, null, null, bobStore.GetIdentityKeyPair().getPublicKey());
bobStore.StorePreKey(31338, new PreKeyRecord(bobPreKey.getPreKeyId(), bobPreKeyPair));
aliceSessionBuilder.process(bobPreKey);
outgoingMessage = aliceSessionCipher.encrypt(Encoding.UTF8.GetBytes(originalMessage));
try
{
bobSessionCipher.decrypt(new PreKeyWhisperMessage(outgoingMessage.serialize()));
throw new Exception("shouldn't be trusted!");
}
catch (UntrustedIdentityException uie)
{
bobStore.SaveIdentity(ALICE_ADDRESS.getName(), new PreKeyWhisperMessage(outgoingMessage.serialize()).getIdentityKey());
}
plaintext = bobSessionCipher.decrypt(new PreKeyWhisperMessage(outgoingMessage.serialize()));
Assert.AreEqual(originalMessage, Encoding.UTF8.GetString(plaintext));
bobPreKey = new PreKeyBundle(bobStore.GetLocalRegistrationId(), 1,
31337, Curve.generateKeyPair().getPublicKey(),
0, null, null,
aliceStore.GetIdentityKeyPair().getPublicKey());
try
{
aliceSessionBuilder.process(bobPreKey);
throw new Exception("shoulnd't be trusted!");
}
catch (UntrustedIdentityException uie)
{
// good
}
}
public void testBadMessageBundle()
{
AxolotlStore aliceStore = new TestInMemoryAxolotlStore();
SessionBuilder aliceSessionBuilder = new SessionBuilder(aliceStore, BOB_ADDRESS);
AxolotlStore bobStore = new TestInMemoryAxolotlStore();
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, DateUtil.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(Encoding.UTF8.GetBytes(originalMessage));
Assert.AreEqual(CiphertextMessage.PREKEY_TYPE, outgoingMessageOne.getType());
byte[] goodMessage = outgoingMessageOne.serialize();
byte[] badMessage = new byte[goodMessage.Length];
Array.Copy(goodMessage, 0, badMessage, 0, badMessage.Length);
badMessage[badMessage.Length - 10] ^= 0x01;
PreKeyWhisperMessage incomingMessage = new PreKeyWhisperMessage(badMessage);
SessionCipher bobSessionCipher = new SessionCipher(bobStore, ALICE_ADDRESS);
byte[] plaintext = new byte[0];
try
{
plaintext = bobSessionCipher.decrypt(incomingMessage);
throw new Exception("Decrypt should have failed!");
}
catch (InvalidMessageException e)
{
// good.
}
Assert.IsTrue(bobStore.ContainsPreKey(31337));
plaintext = bobSessionCipher.decrypt(new PreKeyWhisperMessage(goodMessage));
Assert.AreEqual(originalMessage, Encoding.UTF8.GetString(plaintext));
Assert.IsFalse(bobStore.ContainsPreKey(31337));
}
public void testRepeatBundleMessageV3()
{
AxolotlStore aliceStore = new TestInMemoryAxolotlStore();
SessionBuilder aliceSessionBuilder = new SessionBuilder(aliceStore, BOB_ADDRESS);
AxolotlStore bobStore = new TestInMemoryAxolotlStore();
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, DateUtil.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(Encoding.UTF8.GetBytes(originalMessage));
CiphertextMessage outgoingMessageTwo = aliceSessionCipher.encrypt(Encoding.UTF8.GetBytes(originalMessage));
Assert.AreEqual(CiphertextMessage.PREKEY_TYPE, outgoingMessageOne.getType());
Assert.AreEqual(CiphertextMessage.PREKEY_TYPE, outgoingMessageTwo.getType());
PreKeyWhisperMessage incomingMessage = new PreKeyWhisperMessage(outgoingMessageOne.serialize());
SessionCipher bobSessionCipher = new SessionCipher(bobStore, ALICE_ADDRESS);
byte[] plaintext = bobSessionCipher.decrypt(incomingMessage);
Assert.AreEqual(originalMessage, Encoding.UTF8.GetString(plaintext));
CiphertextMessage bobOutgoingMessage = bobSessionCipher.encrypt(Encoding.UTF8.GetBytes(originalMessage));
byte[] alicePlaintext = aliceSessionCipher.decrypt(new WhisperMessage(bobOutgoingMessage.serialize()));
Assert.AreEqual(originalMessage, Encoding.UTF8.GetString(alicePlaintext));
// The test
PreKeyWhisperMessage incomingMessageTwo = new PreKeyWhisperMessage(outgoingMessageTwo.serialize());
plaintext = bobSessionCipher.decrypt(new PreKeyWhisperMessage(incomingMessageTwo.serialize()));
Assert.AreEqual(originalMessage, Encoding.UTF8.GetString(plaintext));
bobOutgoingMessage = bobSessionCipher.encrypt(Encoding.UTF8.GetBytes(originalMessage));
alicePlaintext = aliceSessionCipher.decrypt(new WhisperMessage(bobOutgoingMessage.serialize()));
Assert.AreEqual(originalMessage, Encoding.UTF8.GetString(alicePlaintext));
}