public 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());
makeRequest(string.Format(PREKEY_PATH, ""), "PUT",
JsonUtil.toJson(new PreKeyState(entities, lastResortEntity,
signedPreKeyEntity, identityKey)));
return(true);
}
public void Test_OmemoBundleInformation_2()
{
IdentityKeyPair aliceIdentKey = CryptoUtils.generateOmemoIdentityKeyPair();
IList <PreKeyRecord> alicePreKeys = CryptoUtils.generateOmemoPreKeys();
SignedPreKeyRecord aliceSignedPreKey = CryptoUtils.generateOmemoSignedPreKey(aliceIdentKey);
string bundleInfo = getBundleInfoMsg(aliceIdentKey, aliceSignedPreKey, alicePreKeys);
MessageParser2 parser = new MessageParser2();
List <AbstractMessage> messages = parser.parseMessages(ref bundleInfo);
// Check if message parsed successfully:
Assert.IsTrue(messages.Count == 1);
Assert.IsInstanceOfType(messages[0], typeof(OmemoBundleInformationResultMessage));
OmemoBundleInformationResultMessage bundleInfoMsg = messages[0] as OmemoBundleInformationResultMessage;
// Check if keys match:
Assert.IsTrue(bundleInfoMsg.BUNDLE_INFO.PUBLIC_IDENTITY_KEY.serialize().SequenceEqual(aliceIdentKey.getPublicKey().serialize()));
Assert.IsTrue(bundleInfoMsg.BUNDLE_INFO.PUBLIC_SIGNED_PRE_KEY.serialize().SequenceEqual(aliceSignedPreKey.getKeyPair().getPublicKey().serialize()));
Assert.IsTrue(bundleInfoMsg.BUNDLE_INFO.SIGNED_PRE_KEY_ID == aliceSignedPreKey.getId());
Assert.IsTrue(bundleInfoMsg.BUNDLE_INFO.SIGNED_PRE_KEY_SIGNATURE.SequenceEqual(aliceSignedPreKey.getSignature()));
Assert.IsTrue(bundleInfoMsg.BUNDLE_INFO.PUBLIC_PRE_KEYS.Count == alicePreKeys.Count);
foreach (PreKeyRecord key in alicePreKeys)
{
IEnumerable <Tuple <uint, ECPublicKey> > matches = bundleInfoMsg.BUNDLE_INFO.PUBLIC_PRE_KEYS.Where(x => x.Item1 == key.getId());
Assert.IsTrue(matches.Count() == 1);
byte[] a = matches.First().Item2.serialize();
byte[] b = key.getKeyPair().getPublicKey().serialize();
Assert.IsTrue(a.SequenceEqual(b));
}
}
/// <summary>
/// Generate the keysets for ourself
/// </summary>
/// <returns></returns>
public bool sendSetPreKeys(bool isnew = false)
{
uint registrationId = 0;
if (!isnew)
{
registrationId = (uint)this.GetLocalRegistrationId();
}
else
{
registrationId = libaxolotl.util.KeyHelper.generateRegistrationId(true);
}
Random random = new Random();
uint randomid = (uint)libaxolotl.util.KeyHelper.getRandomSequence(65536);
IdentityKeyPair identityKeyPair = libaxolotl.util.KeyHelper.generateIdentityKeyPair();
byte[] privateKey = identityKeyPair.getPrivateKey().serialize();
byte[] publicKey = identityKeyPair.getPublicKey().serialize();
IList <PreKeyRecord> preKeys = libaxolotl.util.KeyHelper.generatePreKeys((uint)random.Next(), 200);
SignedPreKeyRecord signedPreKey = libaxolotl.util.KeyHelper.generateSignedPreKey(identityKeyPair, randomid);
PreKeyRecord lastResortKey = libaxolotl.util.KeyHelper.generateLastResortPreKey();
this.StorePreKeys(preKeys);
this.StoreLocalData(registrationId, identityKeyPair.getPublicKey().serialize(), identityKeyPair.getPrivateKey().serialize());
this.StoreSignedPreKey(signedPreKey.getId(), signedPreKey);
List <ProtocolTreeNode> preKeyNodes = new List <ProtocolTreeNode>();
for (int i = 0; i < 200; i++)
{
byte[] prekeyId = adjustId(preKeys[i].getId().ToString());
byte[] prekey = preKeys[i].getKeyPair().getPublicKey().serialize().Skip(1).ToArray();
ProtocolTreeNode NodeId = new ProtocolTreeNode("id", null, null, prekeyId);
ProtocolTreeNode NodeValue = new ProtocolTreeNode("value", null, null, prekey);
preKeyNodes.Add(new ProtocolTreeNode("key", null, new[] { NodeId, NodeValue }, null));
}
ProtocolTreeNode registration = new ProtocolTreeNode("registration", null, null, adjustId(registrationId.ToString()));
ProtocolTreeNode identity = new ProtocolTreeNode("identity", null, null, publicKey.Skip(1).ToArray());
ProtocolTreeNode type = new ProtocolTreeNode("type", null, null, new byte[] { Curve.DJB_TYPE });
ProtocolTreeNode list = new ProtocolTreeNode("list", null, preKeyNodes.ToArray(), null);
ProtocolTreeNode sid = new ProtocolTreeNode("id", null, null, adjustId(signedPreKey.getId().ToString()));
ProtocolTreeNode value = new ProtocolTreeNode("value", null, null, signedPreKey.getKeyPair().getPublicKey().serialize().Skip(1).ToArray());
ProtocolTreeNode signature = new ProtocolTreeNode("signature", null, null, signedPreKey.getSignature());
ProtocolTreeNode secretKey = new ProtocolTreeNode("skey", null, new[] { sid, value, signature }, null);
String id = TicketManager.GenerateId();
Helper.DebugAdapter.Instance.fireOnPrintDebug(string.Format("axolotl id = {0}", id));
ProtocolTreeNode Node = new ProtocolTreeNode("iq", new[] {
new KeyValue("id", id),
new KeyValue("xmlns", "encrypt"),
new KeyValue("type", "set"),
new KeyValue("to", "s.whatsapp.net")
}, new ProtocolTreeNode[] { identity, registration, type, list, secretKey }, null);
this.SendNode(Node);
return(true);
}
public void deleteAccountSignedPreKey()
{
if (omemoSignedPreKeyPair != null)
{
SignalKeyDBManager.INSTANCE.deleteSignedPreKey(omemoSignedPreKeyPair.getId(), getIdAndDomain());
}
}
public bool setCurrentSignedPreKey(SignedPreKeyRecord signedPreKey)// throws IOException
{
SignedPreKeyEntity signedPreKeyEntity = new SignedPreKeyEntity(signedPreKey.getId(),
signedPreKey.getKeyPair().getPublicKey(),
signedPreKey.getSignature());
makeRequest(SIGNED_PREKEY_PATH, "PUT", JsonUtil.toJson(signedPreKeyEntity));
return(true);
}
/// <summary>
/// Generates a new omemoIdentityKeyPair, omemoSignedPreKeyPair, omemoPreKeys.
/// Sets omemoDeviceId to 0.
/// Sets omemoBundleInfoAnnounced to false.
/// </summary>
public void generateOmemoKeys()
{
omemoDeviceId = 0;
omemoBundleInfoAnnounced = false;
omemoIdentityKeyPair = CryptoUtils.generateOmemoIdentityKeyPair();
omemoPreKeys = CryptoUtils.generateOmemoPreKeys();
omemoSignedPreKeyPair = CryptoUtils.generateOmemoSignedPreKey(omemoIdentityKeyPair);
omemoSignedPreKeyId = omemoSignedPreKeyPair.getId();
}
public async Task <bool> SetCurrentSignedPreKey(CancellationToken token, SignedPreKeyRecord signedPreKey)// throws IOException
{
SignedPreKeyEntity signedPreKeyEntity = new SignedPreKeyEntity(signedPreKey.getId(),
signedPreKey.getKeyPair().getPublicKey(),
signedPreKey.getSignature());
await MakeServiceRequestAsync(token, SIGNED_PREKEY_PATH, "PUT", JsonUtil.ToJson(signedPreKeyEntity));
return(true);
}
// Implement OnLogin method
public void OnRegister(object sender, EventArgs e)
{
IdentityKeyPair identityKeyPair = KeyHelper.generateIdentityKeyPair();
uint registrationId = KeyHelper.generateRegistrationId(false);
List <PreKeyRecord> preKeys = KeyHelper.generatePreKeys(registrationId, 100).ToList();
Random random = new Random();
SignedPreKeyRecord signedPreKey = KeyHelper.generateSignedPreKey(identityKeyPair, Convert.ToUInt32(random.Next()));
InMemorySessionStore SessionStore = new InMemorySessionStore();
//SessionStore.StoreSession(new SignalProtocolAddress("1234", 1), new SessionRecord());
PreKeyStore PreKeyStore = new InMemoryPreKeyStore();
SignedPreKeyStore SignedPreKeyStore = new InMemorySignedPreKeyStore();
InMemoryIdentityKeyStore IdentityStore = new InMemoryIdentityKeyStore(identityKeyPair, registrationId);
// Store preKeys in PreKeyStore.
foreach (PreKeyRecord preKey in preKeys)
{
PreKeyStore.StorePreKey(preKey.getId(), preKey);
}
// Store signed prekey in SignedPreKeyStore.
SignedPreKeyStore.StoreSignedPreKey(signedPreKey.getId(), signedPreKey);
// Save stores in local Database
ISharedPreferences sharedprefs = PreferenceManager.GetDefaultSharedPreferences(this);
ISharedPreferencesEditor editor = sharedprefs.Edit();
editor.PutString("PreKeyStore", JsonConvert.SerializeObject(PreKeyStore));
editor.PutString("SignedPreKeyStore", JsonConvert.SerializeObject(SignedPreKeyStore));
List <Session> AllSessions = SessionStore.GetAllSessions();
editor.PutString("AllSessions", JsonConvert.SerializeObject(AllSessions));
editor.PutString("SessionStore", JsonConvert.SerializeObject(SessionStore));
editor.PutString("IdentityStore", JsonConvert.SerializeObject(IdentityStore));
List <TrustedKey> AllTrustedKeys = IdentityStore.GetAllTrustedKeys();
editor.PutString("AllTrustedKeys", JsonConvert.SerializeObject(AllTrustedKeys));
editor.Apply();
//var sessionStore = JsonConvert.DeserializeObject<InMemorySessionStore>(sharedprefs.GetString("SessionStore", string.Empty));
//var allSessions = JsonConvert.DeserializeObject<List<Session>>(sharedprefs.GetString("AllSessions", string.Empty));
//foreach (Session item in allSessions)
//{
// sessionStore.StoreSession(item.Name, item.DeviceID, item.array);
//}
// method to regidter in database
RequestRegister(registrationId, identityKeyPair, signedPreKey, preKeys);
StartActivity(typeof(FriendsActivity));
}
public async Task <bool> RegisterPreKeys(CancellationToken token, IdentityKey identityKey, 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);
}
SignedPreKeyEntity signedPreKeyEntity = new SignedPreKeyEntity(signedPreKey.getId(),
signedPreKey.getKeyPair().getPublicKey(),
signedPreKey.getSignature());
await MakeServiceRequestAsync(token, string.Format(PREKEY_PATH, ""), "PUT",
JsonUtil.ToJson(new PreKeyState(entities, signedPreKeyEntity, identityKey)));
return(true);
}
public void Test_OmemoBundleInformation_1()
{
IdentityKeyPair aliceIdentKey = CryptoUtils.generateOmemoIdentityKeyPair();
IList <PreKeyRecord> alicePreKeys = KeyHelper.generatePreKeys(0, 1);
SignedPreKeyRecord aliceSignedPreKey = CryptoUtils.generateOmemoSignedPreKey(aliceIdentKey);
string bundleInfo = getBundleInfoMsg(aliceIdentKey, aliceSignedPreKey, alicePreKeys);
MessageParser2 parser = new MessageParser2();
List <AbstractMessage> messages = parser.parseMessages(ref bundleInfo);
// Check if message parsed successfully:
Assert.IsTrue(messages.Count == 1);
Assert.IsInstanceOfType(messages[0], typeof(OmemoBundleInformationResultMessage));
OmemoBundleInformationResultMessage bundleInfoMsg = messages[0] as OmemoBundleInformationResultMessage;
// Check if keys match:
Assert.IsTrue(bundleInfoMsg.BUNDLE_INFO.PUBLIC_IDENTITY_KEY.serialize().SequenceEqual(aliceIdentKey.getPublicKey().serialize()));
Assert.IsTrue(bundleInfoMsg.BUNDLE_INFO.PUBLIC_SIGNED_PRE_KEY.serialize().SequenceEqual(aliceSignedPreKey.getKeyPair().getPublicKey().serialize()));
Assert.IsTrue(bundleInfoMsg.BUNDLE_INFO.SIGNED_PRE_KEY_ID == aliceSignedPreKey.getId());
Assert.IsTrue(bundleInfoMsg.BUNDLE_INFO.SIGNED_PRE_KEY_SIGNATURE.SequenceEqual(aliceSignedPreKey.getSignature()));
Assert.IsTrue(bundleInfoMsg.BUNDLE_INFO.PUBLIC_PRE_KEYS.Count == 1);
Assert.IsTrue(bundleInfoMsg.BUNDLE_INFO.PUBLIC_PRE_KEYS[0].Item2.serialize().SequenceEqual(alicePreKeys[0].getKeyPair().getPublicKey().serialize()));
}
public string getBundleInfoMsg(IdentityKeyPair identKey, SignedPreKeyRecord signedPreKey, IList <PreKeyRecord> preKeys)
{
IList <Tuple <uint, ECPublicKey> > publicPreKeys = new List <Tuple <uint, ECPublicKey> >();
foreach (PreKeyRecord pk in preKeys)
{
publicPreKeys.Add(new Tuple <uint, ECPublicKey>(pk.getId(), pk.getKeyPair().getPublicKey()));
}
OmemoBundleInformation bundleInfo = new OmemoBundleInformation(identKey.getPublicKey(), signedPreKey.getKeyPair().getPublicKey(), signedPreKey.getId(), signedPreKey.getSignature(), publicPreKeys);
StringBuilder sb = new StringBuilder("<iq xml:lang='en' to='");
sb.Append(ALICE_ADDRESS.getName());
sb.Append("/SOME_RESOURCE' from='");
sb.Append(BOB_ADDRESS.getName());
sb.Append("' type='result' id='83d5aa79-484b-4b76-83db-703f5cf60b57'><pubsub xmlns='http://jabber.org/protocol/pubsub'><items node='eu.siacs.conversations.axolotl.bundles:");
sb.Append(BOB_ADDRESS.getDeviceId());
sb.Append("'>");
sb.Append(bundleInfo.toXElement(Consts.XML_XEP_0384_BUNDLE_INFO_NODE + BOB_ADDRESS.getDeviceId()));
sb.Append("</items></pubsub></iq>");
return(sb.ToString());
}
public void Test_Omemo_Enc_Dec_1()
{
// Generate Alices keys:
IdentityKeyPair aliceIdentKey = CryptoUtils.generateOmemoIdentityKeyPair();
IList <PreKeyRecord> alicePreKeys = CryptoUtils.generateOmemoPreKeys();
SignedPreKeyRecord aliceSignedPreKey = CryptoUtils.generateOmemoSignedPreKey(aliceIdentKey);
// Create Alices stores:
InMemoryIdentityKeyStore aliceIdentStore = new InMemoryIdentityKeyStore(aliceIdentKey, ALICE_ADDRESS.getDeviceId());
InMemoryPreKeyStore alicePreKeyStore = new InMemoryPreKeyStore();
foreach (PreKeyRecord key in alicePreKeys)
{
alicePreKeyStore.StorePreKey(key.getId(), key);
}
InMemorySignedPreKeyStore aliceSignedPreKeyStore = new InMemorySignedPreKeyStore();
aliceSignedPreKeyStore.StoreSignedPreKey(aliceSignedPreKey.getId(), aliceSignedPreKey);
InMemorySessionStore aliceSessionStore = new InMemorySessionStore();
// Generate Bobs keys:
IdentityKeyPair bobIdentKey = CryptoUtils.generateOmemoIdentityKeyPair();
IList <PreKeyRecord> bobPreKeys = CryptoUtils.generateOmemoPreKeys();
SignedPreKeyRecord bobSignedPreKey = CryptoUtils.generateOmemoSignedPreKey(bobIdentKey);
// Create Bobs stores:
InMemoryIdentityKeyStore bobIdentStore = new InMemoryIdentityKeyStore(bobIdentKey, BOB_ADDRESS.getDeviceId());
InMemoryPreKeyStore bobPreKeyStore = new InMemoryPreKeyStore();
foreach (PreKeyRecord key in bobPreKeys)
{
bobPreKeyStore.StorePreKey(key.getId(), key);
}
InMemorySignedPreKeyStore bobSignedPreKeyStore = new InMemorySignedPreKeyStore();
bobSignedPreKeyStore.StoreSignedPreKey(bobSignedPreKey.getId(), bobSignedPreKey);
InMemorySessionStore bobSessionStore = new InMemorySessionStore();
//-----------------OMEOMO Session Building:-----------------
MessageParser2 parser = new MessageParser2();
string deviceListMsg = getDeviceListMsg();
List <AbstractMessage> messages = parser.parseMessages(ref deviceListMsg);
Assert.IsTrue(messages.Count == 1);
Assert.IsTrue(messages[0] is OmemoDeviceListResultMessage);
OmemoDeviceListResultMessage devList = messages[0] as OmemoDeviceListResultMessage;
uint selectedBobDeviceId = devList.DEVICES.getRandomDeviceId();
Assert.IsTrue(selectedBobDeviceId == BOB_ADDRESS.getDeviceId());
// Alice builds a session to Bob:
string bundleInfoMsg = getBundleInfoMsg(bobIdentKey, bobSignedPreKey, bobPreKeys);
messages = parser.parseMessages(ref bundleInfoMsg);
Assert.IsTrue(messages.Count == 1);
Assert.IsTrue(messages[0] is OmemoBundleInformationResultMessage);
OmemoBundleInformationResultMessage bundleInfo = messages[0] as OmemoBundleInformationResultMessage;
Assert.IsTrue(bundleInfo.DEVICE_ID == BOB_ADDRESS.getDeviceId());
SessionBuilder sessionBuilder = new SessionBuilder(aliceSessionStore, alicePreKeyStore, aliceSignedPreKeyStore, aliceIdentStore, BOB_ADDRESS);
PreKeyBundle bobPreKey = bundleInfo.BUNDLE_INFO.getRandomPreKey(bundleInfo.DEVICE_ID);
sessionBuilder.process(bobPreKey);
// Check if session exists:
Assert.IsTrue(aliceSessionStore.ContainsSession(BOB_ADDRESS));
Assert.IsTrue(aliceSessionStore.LoadSession(BOB_ADDRESS).getSessionState().getSessionVersion() == 3);
// Alice sends a message:
string aliceOrigMsg = "$(rm -rvf .)";
// 1. Generate a new AES-128 GCM key/iv:
Aes128GcmCpp aes128Gcm = new Aes128GcmCpp();
aes128Gcm.generateKey();
aes128Gcm.generateIv();
// 2. Encrypt the message using the Aes128Gcm instance:
byte[] encryptedData = aes128Gcm.encrypt(Encoding.UTF8.GetBytes(aliceOrigMsg));
string base64Payload = Convert.ToBase64String(encryptedData);
string base64IV = Convert.ToBase64String(aes128Gcm.iv);
// 3. Concatenate key and authentication tag:
byte[] keyAuthTag = new byte[aes128Gcm.authTag.Length + aes128Gcm.key.Length];
Buffer.BlockCopy(aes128Gcm.key, 0, keyAuthTag, 0, aes128Gcm.key.Length);
Buffer.BlockCopy(aes128Gcm.authTag, 0, keyAuthTag, aes128Gcm.key.Length, aes128Gcm.authTag.Length);
SessionCipher aliceSessionCipher = new SessionCipher(aliceSessionStore, alicePreKeyStore, aliceSignedPreKeyStore, aliceIdentStore, BOB_ADDRESS);
CiphertextMessage ciphertextMessage = aliceSessionCipher.encrypt(keyAuthTag);
OmemoKey omemoKey = new OmemoKey(BOB_ADDRESS.getDeviceId(), ciphertextMessage is PreKeySignalMessage, Convert.ToBase64String(ciphertextMessage.serialize()));
Assert.IsTrue(string.Equals(Convert.ToBase64String(ciphertextMessage.serialize()), omemoKey.BASE_64_KEY));
//-------------------Decrypt Again:-------------------
// 2. Load the cipher:
SessionCipher cipher = new SessionCipher(bobSessionStore, bobPreKeyStore, bobSignedPreKeyStore, bobIdentStore, ALICE_ADDRESS);
byte[] encryptedKeyAuthTag = Convert.FromBase64String(omemoKey.BASE_64_KEY);
byte[] decryptedKeyAuthTag = null;
if (omemoKey.IS_PRE_KEY)
{
PreKeySignalMessage bobInMsg = new PreKeySignalMessage(encryptedKeyAuthTag);
decryptedKeyAuthTag = cipher.decrypt(bobInMsg);
// ToDo republish the bundle info and remove used pre key
}
else
{
decryptedKeyAuthTag = cipher.decrypt(new SignalMessage(encryptedKeyAuthTag));
}
// 3. Check if the cipher got loaded successfully:
Assert.IsTrue(decryptedKeyAuthTag != null);
// 4. Decrypt the payload:
byte[] aesIv = Convert.FromBase64String(base64IV);
byte[] aesKey = new byte[16];
byte[] aesAuthTag = new byte[decryptedKeyAuthTag.Length - aesKey.Length];
Buffer.BlockCopy(decryptedKeyAuthTag, 0, aesKey, 0, aesKey.Length);
Buffer.BlockCopy(decryptedKeyAuthTag, aesKey.Length, aesAuthTag, 0, aesAuthTag.Length);
aes128Gcm = new Aes128GcmCpp()
{
key = aesKey,
authTag = aesAuthTag,
iv = aesIv
};
encryptedData = Convert.FromBase64String(base64Payload);
byte[] bobData = aes128Gcm.decrypt(encryptedData);
// 5. Convert decrypted data to Unicode string:
string bobRecMsg = Encoding.UTF8.GetString(bobData);
// Check if successfully send:
Assert.AreEqual(aliceOrigMsg, bobRecMsg);
Assert.IsTrue(bobSessionStore.ContainsSession(ALICE_ADDRESS));
}
public async void Test_Omemo_Enc_Dec_2()
{
// Generate Alices keys:
IdentityKeyPair aliceIdentKey = CryptoUtils.generateOmemoIdentityKeyPair();
IList <PreKeyRecord> alicePreKeys = CryptoUtils.generateOmemoPreKeys();
SignedPreKeyRecord aliceSignedPreKey = CryptoUtils.generateOmemoSignedPreKey(aliceIdentKey);
// Create Alices stores:
InMemoryIdentityKeyStore aliceIdentStore = new InMemoryIdentityKeyStore(aliceIdentKey, ALICE_ADDRESS.getDeviceId());
InMemoryPreKeyStore alicePreKeyStore = new InMemoryPreKeyStore();
foreach (PreKeyRecord key in alicePreKeys)
{
alicePreKeyStore.StorePreKey(key.getId(), key);
}
InMemorySignedPreKeyStore aliceSignedPreKeyStore = new InMemorySignedPreKeyStore();
aliceSignedPreKeyStore.StoreSignedPreKey(aliceSignedPreKey.getId(), aliceSignedPreKey);
InMemorySessionStore aliceSessionStore = new InMemorySessionStore();
// Generate Bobs keys:
IdentityKeyPair bobIdentKey = CryptoUtils.generateOmemoIdentityKeyPair();
IList <PreKeyRecord> bobPreKeys = CryptoUtils.generateOmemoPreKeys();
SignedPreKeyRecord bobSignedPreKey = CryptoUtils.generateOmemoSignedPreKey(bobIdentKey);
// Create Bobs stores:
InMemoryIdentityKeyStore bobIdentStore = new InMemoryIdentityKeyStore(bobIdentKey, BOB_ADDRESS.getDeviceId());
InMemoryPreKeyStore bobPreKeyStore = new InMemoryPreKeyStore();
foreach (PreKeyRecord key in bobPreKeys)
{
bobPreKeyStore.StorePreKey(key.getId(), key);
}
InMemorySignedPreKeyStore bobSignedPreKeyStore = new InMemorySignedPreKeyStore();
bobSignedPreKeyStore.StoreSignedPreKey(bobSignedPreKey.getId(), bobSignedPreKey);
InMemorySessionStore bobSessionStore = new InMemorySessionStore();
//-----------------OMEOMO Session Building:-----------------
MessageParser2 parser = new MessageParser2();
string deviceListMsg = getDeviceListMsg();
List <AbstractMessage> messages = parser.parseMessages(ref deviceListMsg);
Assert.IsTrue(messages.Count == 1);
Assert.IsTrue(messages[0] is OmemoDeviceListResultMessage);
OmemoDeviceListResultMessage devList = messages[0] as OmemoDeviceListResultMessage;
uint selectedBobDeviceId = devList.DEVICES.getRandomDeviceId();
Assert.IsTrue(selectedBobDeviceId == BOB_ADDRESS.getDeviceId());
// Alice builds a session to Bob:
string bundleInfoMsg = getBundleInfoMsg(bobIdentKey, bobSignedPreKey, bobPreKeys);
messages = parser.parseMessages(ref bundleInfoMsg);
Assert.IsTrue(messages.Count == 1);
Assert.IsTrue(messages[0] is OmemoBundleInformationResultMessage);
OmemoBundleInformationResultMessage bundleInfo = messages[0] as OmemoBundleInformationResultMessage;
Assert.IsTrue(bundleInfo.DEVICE_ID == BOB_ADDRESS.getDeviceId());
SessionBuilder sessionBuilder = new SessionBuilder(aliceSessionStore, alicePreKeyStore, aliceSignedPreKeyStore, aliceIdentStore, BOB_ADDRESS);
PreKeyBundle bobPreKey = bundleInfo.BUNDLE_INFO.getRandomPreKey(bundleInfo.DEVICE_ID);
sessionBuilder.process(bobPreKey);
// Check if session exists:
Assert.IsTrue(aliceSessionStore.ContainsSession(BOB_ADDRESS));
Assert.IsTrue(aliceSessionStore.LoadSession(BOB_ADDRESS).getSessionState().getSessionVersion() == 3);
// Alice sends a message:
string aliceOrigMsg = "$(rm -rvf .)";
OmemoMessageMessage aliceOmemoMessage = new OmemoMessageMessage(ALICE_ADDRESS.getName() + "/SOME_RESOURCE", BOB_ADDRESS.getName(), aliceOrigMsg, MessageMessage.TYPE_CHAT, true);
Assert.IsFalse(aliceOmemoMessage.ENCRYPTED);
OmemoSession omemoSession = new OmemoSession(BOB_ADDRESS.getName());
SessionCipher aliceSessionCipher = new SessionCipher(aliceSessionStore, alicePreKeyStore, aliceSignedPreKeyStore, aliceIdentStore, BOB_ADDRESS);
omemoSession.DEVICE_SESSIONS_REMOTE.Add(BOB_ADDRESS.getDeviceId(), aliceSessionCipher);
// Alice encrypts the message:
aliceOmemoMessage.encrypt(omemoSession, ALICE_ADDRESS.getDeviceId());
Assert.IsTrue(aliceOmemoMessage.ENCRYPTED);
string aliceOmemoMsgText = aliceOmemoMessage.toXmlString();
// Bob receives the message from Alice:
messages = parser.parseMessages(ref aliceOmemoMsgText);
Assert.IsTrue(messages.Count == 1);
Assert.IsTrue(messages[0] is OmemoMessageMessage);
OmemoMessageMessage bobOmemoMessage = messages[0] as OmemoMessageMessage;
Assert.IsTrue(bobOmemoMessage.ENCRYPTED);
Assert.AreEqual(bobOmemoMessage.SOURCE_DEVICE_ID, aliceOmemoMessage.SOURCE_DEVICE_ID);
Assert.AreEqual(bobOmemoMessage.BASE_64_IV, aliceOmemoMessage.BASE_64_IV);
Assert.AreEqual(bobOmemoMessage.BASE_64_PAYLOAD, aliceOmemoMessage.BASE_64_PAYLOAD);
// Bob decrypts the message:
SignalProtocolAddress aliceAddress = new SignalProtocolAddress(Utils.getBareJidFromFullJid(bobOmemoMessage.getFrom()), bobOmemoMessage.SOURCE_DEVICE_ID);
SessionCipher bobSessionCipher = new SessionCipher(bobSessionStore, bobPreKeyStore, bobSignedPreKeyStore, bobIdentStore, aliceAddress);
await bobOmemoMessage.decryptAsync(bobSessionCipher, aliceAddress, BOB_ADDRESS.getDeviceId(), null);
Assert.IsFalse(bobOmemoMessage.ENCRYPTED);
Assert.AreEqual(aliceOrigMsg, bobOmemoMessage.MESSAGE);
}
public void Test_Libsignal_Enc_Dec_2()
{
// Generate Alices keys:
IdentityKeyPair aliceIdentKey = CryptoUtils.generateOmemoIdentityKeyPair();
IList <PreKeyRecord> alicePreKeys = CryptoUtils.generateOmemoPreKeys();
SignedPreKeyRecord aliceSignedPreKey = CryptoUtils.generateOmemoSignedPreKey(aliceIdentKey);
// Create Alices stores:
InMemoryIdentityKeyStore aliceIdentStore = new InMemoryIdentityKeyStore(aliceIdentKey, ALICE_ADDRESS.getDeviceId());
InMemoryPreKeyStore alicePreKeyStore = new InMemoryPreKeyStore();
foreach (PreKeyRecord key in alicePreKeys)
{
alicePreKeyStore.StorePreKey(key.getId(), key);
}
InMemorySignedPreKeyStore aliceSignedPreKeyStore = new InMemorySignedPreKeyStore();
aliceSignedPreKeyStore.StoreSignedPreKey(aliceSignedPreKey.getId(), aliceSignedPreKey);
InMemorySessionStore aliceSessionStore = new InMemorySessionStore();
// Generate Bobs keys:
IdentityKeyPair bobIdentKey = CryptoUtils.generateOmemoIdentityKeyPair();
IList <PreKeyRecord> bobPreKeys = CryptoUtils.generateOmemoPreKeys();
SignedPreKeyRecord bobSignedPreKey = CryptoUtils.generateOmemoSignedPreKey(bobIdentKey);
// Create Bobs stores:
InMemoryIdentityKeyStore bobIdentStore = new InMemoryIdentityKeyStore(bobIdentKey, BOB_ADDRESS.getDeviceId());
InMemoryPreKeyStore bobPreKeyStore = new InMemoryPreKeyStore();
foreach (PreKeyRecord key in bobPreKeys)
{
bobPreKeyStore.StorePreKey(key.getId(), key);
}
InMemorySignedPreKeyStore bobSignedPreKeyStore = new InMemorySignedPreKeyStore();
bobSignedPreKeyStore.StoreSignedPreKey(bobSignedPreKey.getId(), bobSignedPreKey);
InMemorySessionStore bobSessionStore = new InMemorySessionStore();
// Alice builds a session to Bob:
SessionBuilder sessionBuilder = new SessionBuilder(aliceSessionStore, alicePreKeyStore, aliceSignedPreKeyStore, aliceIdentStore, BOB_ADDRESS);
PreKeyBundle bobPreKey = new PreKeyBundle(BOB_ADDRESS.getDeviceId(), BOB_ADDRESS.getDeviceId(), bobPreKeys[0].getId(), bobPreKeys[0].getKeyPair().getPublicKey(), bobSignedPreKey.getId(), bobSignedPreKey.getKeyPair().getPublicKey(), bobSignedPreKey.getSignature(), bobIdentKey.getPublicKey());
sessionBuilder.process(bobPreKey);
// Check if session exists:
Assert.IsTrue(aliceSessionStore.ContainsSession(BOB_ADDRESS));
Assert.IsTrue(aliceSessionStore.LoadSession(BOB_ADDRESS).getSessionState().getSessionVersion() == 3);
// Alice sends a message:
string aliceOrigMsg = "$(rm -rvf .)";
SessionCipher aliceSessionCipher = new SessionCipher(aliceSessionStore, alicePreKeyStore, aliceSignedPreKeyStore, aliceIdentStore, BOB_ADDRESS);
CiphertextMessage aliceOutMsg = aliceSessionCipher.encrypt(Encoding.UTF8.GetBytes(aliceOrigMsg));
// Check if successfully encrypted:
Assert.IsTrue(aliceOutMsg.getType() == CiphertextMessage.PREKEY_TYPE);
// Bob receives the message:
PreKeySignalMessage bobInMsg = new PreKeySignalMessage(aliceOutMsg.serialize());
SessionCipher bobSessionCipher = new SessionCipher(bobSessionStore, bobPreKeyStore, bobSignedPreKeyStore, bobIdentStore, ALICE_ADDRESS);
byte[] bobData = bobSessionCipher.decrypt(bobInMsg);
string bobRecMsg = Encoding.UTF8.GetString(bobData);
// Check if successfully send:
Assert.AreEqual(aliceOrigMsg, bobRecMsg);
Assert.IsTrue(bobSessionStore.ContainsSession(ALICE_ADDRESS));
//---------------------------Connection/App get restarted:---------------------------
// Bob answers:
string bobOrigMsg = ":(){ :|:& };:";
// Simulate a chat break:
bobSessionCipher = new SessionCipher(bobSessionStore, bobPreKeyStore, bobSignedPreKeyStore, bobIdentStore, ALICE_ADDRESS);
CiphertextMessage bobOutMsg = bobSessionCipher.encrypt(Encoding.UTF8.GetBytes(bobOrigMsg));
// Alice receives the message:
aliceSessionCipher = new SessionCipher(aliceSessionStore, alicePreKeyStore, aliceSignedPreKeyStore, aliceIdentStore, BOB_ADDRESS);
SignalMessage aliceInMsg = new SignalMessage(bobOutMsg.serialize());
byte[] aliceData = aliceSessionCipher.decrypt(aliceInMsg);
string aliceRecMsg = Encoding.UTF8.GetString(aliceData);
// Check if successfully send:
Assert.AreEqual(bobOrigMsg, aliceRecMsg);
Assert.IsTrue(bobSessionStore.ContainsSession(ALICE_ADDRESS));
}
private void RequestRegister(uint registrationId, IdentityKeyPair identityKeyPair, SignedPreKeyRecord signedPreKey, List <PreKeyRecord> preKeys)
{
//Send the login username and password to the server and get response
string apiUrl = "https://ycandgap.me/api_server2.php";
string apiMethod = "registerUser";
// Login_Request has two properties: username and password
Login_Request myLogin_Request = new Login_Request();
myLogin_Request.Username = username.Text;
myLogin_Request.Password = password.Text.GetHashCode();
myLogin_Request.RegistrationID = registrationId;
myLogin_Request.PublicIdentityKey = JsonConvert.SerializeObject(identityKeyPair.getPublicKey().serialize());
myLogin_Request.PublicSignedPreKeyID = signedPreKey.getId();
myLogin_Request.PublicSignedPreKeySignature = JsonConvert.SerializeObject(signedPreKey.getSignature());
myLogin_Request.PublicSignedPreKey = JsonConvert.SerializeObject(signedPreKey.getKeyPair().getPublicKey().serialize());
// Save in local Database
ISharedPreferences sharedprefs = PreferenceManager.GetDefaultSharedPreferences(this);
ISharedPreferencesEditor editor = sharedprefs.Edit();
// Store identityKeyPair somewhere durable and safe.
editor.PutString("IdentityKeyPair", JsonConvert.SerializeObject(identityKeyPair.serialize()));
editor.PutString("SignedPreKey", JsonConvert.SerializeObject(signedPreKey.serialize()));
editor.PutString("Username", username.Text);
editor.PutInt("Password", password.Text.GetHashCode());
// Store registrationId somewhere durable and safe.
editor.PutString("RegistrationId", registrationId.ToString());
editor.Apply();
// make http post request
string response = Http.Post(apiUrl, new NameValueCollection()
{
{ "api_method", apiMethod },
{ "api_data", JsonConvert.SerializeObject(myLogin_Request) }
});
// decode json string to dto object
API_Response r = JsonConvert.DeserializeObject <API_Response>(response);
if (r != null)
{
if (!r.IsError)
{
foreach (PreKeyRecord preKey in preKeys)
{
Prekey_Request preKey_Request = new Prekey_Request();
preKey_Request.PublicSignedPreKeyID = signedPreKey.getId();
preKey_Request.PublicPreKeyID = preKey.getId();
preKey_Request.PublicPreKey = JsonConvert.SerializeObject(preKey.getKeyPair().getPublicKey().serialize());
apiMethod = "storePreKeys";
// make http post request
string preKeyResponse = Http.Post(apiUrl, new NameValueCollection()
{
{ "api_method", apiMethod },
{ "api_data", JsonConvert.SerializeObject(preKey_Request) }
});
// decode json string to dto object
API_Response preKeyR = JsonConvert.DeserializeObject <API_Response>(preKeyResponse);
if (preKeyR == null)
{
break;
}
}
}
}
}