public bool IsValidIdentity(long recipientId,
IdentityKey theirIdentity)
{
try
{
var query = conn.Table<Identity>().Where(v => v.RecipientId.Equals(recipientId));
if (query.Count() > 0)
{
var identity = query.First();
String serializedIdentity = identity.Key;
String mac = identity.Mac;
IdentityKey ourIdentity = new IdentityKey(Base64.decode(serializedIdentity), 0);
return ourIdentity.Equals(theirIdentity);
}
else
{
return true;
}
}
catch (IOException e) { return false; }
catch (InvalidKeyException e) { return false; }
catch (Exception e) { return false; }
}
public PreKeyState(List<PreKeyEntity> preKeys, PreKeyEntity lastResortKey,
SignedPreKeyEntity signedPreKey, IdentityKey identityKey)
{
this.preKeys = preKeys;
this.lastResortKey = lastResortKey;
this.signedPreKey = signedPreKey;
this.identityKey = identityKey;
}
public IdentityKeyMismatch(long recipientId, IdentityKey identityKey)
{
this.RecipientId = recipientId;
this.IdentityKey = identityKey;
/*
var ecKey = identityKey.getPublicKey();
var key = ecKey as DjbECPublicKey;
if (key != null) Key = key.getPublicKey();*/
}
public IdentityKeyPair(byte[] serialized)
{
try
{
IdentityKeyPairStructure structure = IdentityKeyPairStructure.ParseFrom(serialized);
this.publicKey = new IdentityKey(structure.PublicKey.ToByteArray(), 0);
this.privateKey = Curve.decodePrivatePoint(structure.PrivateKey.ToByteArray());
}
catch (InvalidProtocolBufferException e)
{
throw new InvalidKeyException(e);
}
}
public IdentityKeyPair(byte[] serialized)
{
try
{
IdentityKeyPairStructure structure = IdentityKeyPairStructure.ParseFrom(serialized);
this.publicKey = new IdentityKey(structure.PublicKey.ToByteArray(), 0);
this.privateKey = Curve.decodePrivatePoint(structure.PrivateKey.ToByteArray());
}
catch (InvalidProtocolBufferException e)
{
throw new InvalidKeyException(e);
}
}
/**
* Build a new session from a received {@link org.whispersystems.libaxolotl.protocol.PreKeyWhisperMessage}.
*
* After a session is constructed in this way, the embedded {@link org.whispersystems.libaxolotl.protocol.WhisperMessage}
* can be decrypted.
*
* @param message The received {@link org.whispersystems.libaxolotl.protocol.PreKeyWhisperMessage}.
* @throws org.whispersystems.libaxolotl.InvalidKeyIdException when there is no local
* {@link org.whispersystems.libaxolotl.state.PreKeyRecord}
* that corresponds to the PreKey ID in
* the message.
* @throws org.whispersystems.libaxolotl.InvalidKeyException when the message is formatted incorrectly.
* @throws org.whispersystems.libaxolotl.UntrustedIdentityException when the {@link IdentityKey} of the sender is untrusted.
*/
/*package*/
internal May <uint> process(SessionRecord sessionRecord, PreKeyWhisperMessage message)
{
uint messageVersion = message.getMessageVersion();
IdentityKey theirIdentityKey = message.getIdentityKey();
May <uint> unsignedPreKeyId;
if (!identityKeyStore.IsTrustedIdentity(remoteAddress.getName(), theirIdentityKey))
{
throw new UntrustedIdentityException(remoteAddress.getName(), theirIdentityKey);
}
switch (messageVersion)
{
case 2: unsignedPreKeyId = processV2(sessionRecord, message); break;
case 3: unsignedPreKeyId = processV3(sessionRecord, message); break;
default: throw new Exception("Unknown version: " + messageVersion);
}
identityKeyStore.SaveIdentity(remoteAddress.getName(), theirIdentityKey);
return(unsignedPreKeyId);
}
public IdentityKeyPair(IdentityKey publicKey, ECPrivateKey privateKey)
{
this.publicKey = publicKey;
this.privateKey = privateKey;
}
public bool IsTrustedIdentity(string name, IdentityKey identityKey)
{
return identityKeyStore.IsTrustedIdentity(name, identityKey);
}
public bool SaveIdentity(string name, IdentityKey identityKey)
{
identityKeyStore.SaveIdentity(name, identityKey);
return true;
}
/**
* Register an identity key, last resort key, signed prekey, and list of one time prekeys
* with the server.
*
* @param identityKey The client's long-term identity keypair.
* @param lastResortKey The client's "last resort" prekey.
* @param signedPreKey The client's signed prekey.
* @param oneTimePreKeys The client's list of one-time prekeys.
*
* @throws IOException
*/
public async Task<bool> setPreKeys(IdentityKey identityKey, PreKeyRecord lastResortKey,
SignedPreKeyRecord signedPreKey, IList<PreKeyRecord> oneTimePreKeys)
//throws IOException
{
await this.pushServiceSocket.registerPreKeys(identityKey, lastResortKey, signedPreKey, oneTimePreKeys);
return true;
}
public static void generateIdentityKeys()
{
ECKeyPair djbKeyPair = Curve.generateKeyPair();
//MasterCipher masterCipher = new MasterCipher(masterSecret);
IdentityKey djbIdentityKey = new IdentityKey(djbKeyPair.getPublicKey());
byte[] djbPrivateKey = /*masterCipher.encryptKey(*/djbKeyPair.getPrivateKey().serialize()/*)*/;
save(IDENTITY_PUBLIC_KEY_DJB_PREF, System.Convert.ToBase64String(djbIdentityKey.serialize()));
save(IDENTITY_PRIVATE_KEY_DJB_PREF, System.Convert.ToBase64String(djbPrivateKey));
}
public long SaveIdentity(long recipientId, IdentityKey identityKey)
{
String identityKeyString = Base64.encodeBytes(identityKey.serialize()); // TODO: real mac
var identity = new Identity() { RecipientId = recipientId, Key = identityKeyString, Mac = Base64.encode(identityKeyString) };
return conn.InsertOrReplace(identity);
}
public async Task<bool> registerPreKeys(IdentityKey identityKey,
PreKeyRecord lastResortKey,
SignedPreKeyRecord signedPreKey,
IList<PreKeyRecord> records)
//throws IOException
{
List<PreKeyEntity> entities = new List<PreKeyEntity>();
foreach (PreKeyRecord record in records)
{
PreKeyEntity entity = new PreKeyEntity(record.getId(),
record.getKeyPair().getPublicKey());
entities.Add(entity);
}
PreKeyEntity lastResortEntity = new PreKeyEntity(lastResortKey.getId(),
lastResortKey.getKeyPair().getPublicKey());
SignedPreKeyEntity signedPreKeyEntity = new SignedPreKeyEntity(signedPreKey.getId(),
signedPreKey.getKeyPair().getPublicKey(),
signedPreKey.getSignature());
await makeRequest(string.Format(PREKEY_PATH, ""), "PUT",
JsonUtil.toJson(new PreKeyState(entities, lastResortEntity,
signedPreKeyEntity, identityKey)));
return true;
}
public void testRatchetingSessionAsAlice()
{
byte[] bobPublic =
{
0x05, 0x2c, 0xb4, 0x97, 0x76,
0xb8, 0x77, 0x02, 0x05, 0x74,
0x5a, 0x3a, 0x6e, 0x24, 0xf5,
0x79, 0xcd, 0xb4, 0xba, 0x7a,
0x89, 0x04, 0x10, 0x05, 0x92,
0x8e, 0xbb, 0xad, 0xc9, 0xc0,
0x5a, 0xd4, 0x58
};
byte[] bobIdentityPublic =
{
0x05, 0xf1, 0xf4, 0x38, 0x74,
0xf6, 0x96, 0x69, 0x56, 0xc2,
0xdd, 0x47, 0x3f, 0x8f, 0xa1,
0x5a, 0xde, 0xb7, 0x1d, 0x1c,
0xb9, 0x91, 0xb2, 0x34, 0x16,
0x92, 0x32, 0x4c, 0xef, 0xb1,
0xc5, 0xe6, 0x26
};
byte[] aliceBasePublic =
{
0x05, 0x47, 0x2d, 0x1f, 0xb1,
0xa9, 0x86, 0x2c, 0x3a, 0xf6,
0xbe, 0xac, 0xa8, 0x92, 0x02,
0x77, 0xe2, 0xb2, 0x6f, 0x4a,
0x79, 0x21, 0x3e, 0xc7, 0xc9,
0x06, 0xae, 0xb3, 0x5e, 0x03,
0xcf, 0x89, 0x50
};
byte[] aliceBasePrivate =
{
0x11, 0xae, 0x7c, 0x64, 0xd1,
0xe6, 0x1c, 0xd5, 0x96, 0xb7,
0x6a, 0x0d, 0xb5, 0x01, 0x26,
0x73, 0x39, 0x1c, 0xae, 0x66,
0xed, 0xbf, 0xcf, 0x07, 0x3b,
0x4d, 0xa8, 0x05, 0x16, 0xa4,
0x74, 0x49
};
byte[] aliceEphemeralPublic =
{
0x05, 0x6c, 0x3e, 0x0d, 0x1f,
0x52, 0x02, 0x83, 0xef, 0xcc,
0x55, 0xfc, 0xa5, 0xe6, 0x70,
0x75, 0xb9, 0x04, 0x00, 0x7f,
0x18, 0x81, 0xd1, 0x51, 0xaf,
0x76, 0xdf, 0x18, 0xc5, 0x1d,
0x29, 0xd3, 0x4b
};
byte[] aliceEphemeralPrivate =
{
0xd1, 0xba, 0x38, 0xce, 0xa9,
0x17, 0x43, 0xd3, 0x39, 0x39,
0xc3, 0x3c, 0x84, 0x98, 0x65,
0x09, 0x28, 0x01, 0x61, 0xb8,
0xb6, 0x0f, 0xc7, 0x87, 0x0c,
0x59, 0x9c, 0x1d, 0x46, 0x20,
0x12, 0x48
};
byte[] aliceIdentityPublic =
{
0x05, 0xb4, 0xa8, 0x45, 0x56,
0x60, 0xad, 0xa6, 0x5b, 0x40,
0x10, 0x07, 0xf6, 0x15, 0xe6,
0x54, 0x04, 0x17, 0x46, 0x43,
0x2e, 0x33, 0x39, 0xc6, 0x87,
0x51, 0x49, 0xbc, 0xee, 0xfc,
0xb4, 0x2b, 0x4a
};
byte[] aliceIdentityPrivate =
{
0x90, 0x40, 0xf0, 0xd4, 0xe0,
0x9c, 0xf3, 0x8f, 0x6d, 0xc7,
0xc1, 0x37, 0x79, 0xc9, 0x08,
0xc0, 0x15, 0xa1, 0xda, 0x4f,
0xa7, 0x87, 0x37, 0xa0, 0x80,
0xeb, 0x0a, 0x6f, 0x4f, 0x5f,
0x8f, 0x58
};
byte[] receiverChain =
{
0xd2, 0x2f, 0xd5, 0x6d, 0x3f,
0xec, 0x81, 0x9c, 0xf4, 0xc3,
0xd5, 0x0c, 0x56, 0xed, 0xfb,
0x1c, 0x28, 0x0a, 0x1b, 0x31,
0x96, 0x45, 0x37, 0xf1, 0xd1,
0x61, 0xe1, 0xc9, 0x31, 0x48,
0xe3, 0x6b
};
IdentityKey bobIdentityKey = new IdentityKey(bobIdentityPublic, 0);
ECPublicKey bobEphemeralPublicKey = Curve.decodePoint(bobPublic, 0);
ECPublicKey bobBasePublicKey = bobEphemeralPublicKey;
ECPublicKey aliceBasePublicKey = Curve.decodePoint(aliceBasePublic, 0);
ECPrivateKey aliceBasePrivateKey = Curve.decodePrivatePoint(aliceBasePrivate);
ECKeyPair aliceBaseKey = new ECKeyPair(aliceBasePublicKey, aliceBasePrivateKey);
ECPublicKey aliceEphemeralPublicKey = Curve.decodePoint(aliceEphemeralPublic, 0);
ECPrivateKey aliceEphemeralPrivateKey = Curve.decodePrivatePoint(aliceEphemeralPrivate);
ECKeyPair aliceEphemeralKey = new ECKeyPair(aliceEphemeralPublicKey, aliceEphemeralPrivateKey);
IdentityKey aliceIdentityPublicKey = new IdentityKey(aliceIdentityPublic, 0);
ECPrivateKey aliceIdentityPrivateKey = Curve.decodePrivatePoint(aliceIdentityPrivate);
IdentityKeyPair aliceIdentityKey = new IdentityKeyPair(aliceIdentityPublicKey, aliceIdentityPrivateKey);
SessionState session = new SessionState();
AliceAxolotlParameters parameters = AliceAxolotlParameters.newBuilder()
.setOurBaseKey(aliceBaseKey)
.setOurIdentityKey(aliceIdentityKey)
.setTheirIdentityKey(bobIdentityKey)
.setTheirSignedPreKey(bobBasePublicKey)
.setTheirRatchetKey(bobEphemeralPublicKey)
.setTheirOneTimePreKey(May<ECPublicKey>.NoValue)
.create();
RatchetingSession.initializeSession(session, 2, parameters);
Assert.AreEqual(session.getLocalIdentityKey(), aliceIdentityKey.getPublicKey());
Assert.AreEqual(session.getRemoteIdentityKey(), bobIdentityKey);
CollectionAssert.AreEqual(session.getReceiverChainKey(bobEphemeralPublicKey).getKey(), receiverChain);
}
public UntrustedIdentityException(string s, string e164Number, IdentityKey identityKey) : base(s)
{
this.E164Number = e164Number;
this.IdentityKey = identityKey;
}
public IdentityKeyPair(IdentityKey publicKey, ECPrivateKey privateKey)
{
this.publicKey = publicKey;
this.privateKey = privateKey;
}