public static byte[] ScrambleDecrypt(byte[] scrambledData, KeyBlock key)
{
byte[] result = new byte[scrambledData.Length];
int keyPos = 0;
int keyShift = 0;
for (int i = 0; i < scrambledData.Length; ++i)
{
while (key[keyPos] >= ((scrambledData.Length - keyShift)))
{
keyPos++;
if (keyPos >= key.KeyLength)
{
keyPos = 0;
keyShift = i + 1;
}
}
result[key[keyPos] + keyShift] = scrambledData[i];
keyPos++;
if (keyPos >= key.KeyLength)
{
keyPos = 0;
keyShift = i + 1;
}
}
return(result);
}
public void ChangeLocalState()
{
_outputCipherSuite = _nextCipherSuite;
_outputKeyBlock = _nextKeyBlock;
_outputSequenceNumber = 0;
_outputEpoch++;
if (_isClient)
{
_outputHasher = _outputCipherSuite.MACAlgorithm.CreateHasher(_outputKeyBlock.ClientWriteMACKey);
_encryptor = _outputCipherSuite.BulkCipherAlgorithm.CreateEncryptor(_outputKeyBlock.ClientWriteKey,
_outputKeyBlock.ClientWriteIV);
_outputKey = _outputKeyBlock.ClientWriteKey;
_outputFixedIV = _outputKeyBlock.ClientWriteIV;
}
else
{
_outputHasher = _outputCipherSuite.MACAlgorithm.CreateHasher(_outputKeyBlock.ServerWriteMACKey);
_encryptor = _outputCipherSuite.BulkCipherAlgorithm.CreateEncryptor(_outputKeyBlock.ServerWriteKey,
_outputKeyBlock.ServerWriteIV);
_outputKey = _outputKeyBlock.ServerWriteKey;
_outputFixedIV = _outputKeyBlock.ServerWriteIV;
}
// IMPORTANT: This needs to be XORed with ie. sequence number to make sure it is unique
_outputRecordIV = new byte[_outputCipherSuite.BulkCipherAlgorithm.RecordIVLength];
RNGCryptoServiceProvider rngCsp = new RNGCryptoServiceProvider();
rngCsp.GetBytes(_outputRecordIV);
}
public void ChangeRemoteState()
{
_inputCipherSuite = _nextCipherSuite;
_inputKeyBlock = _nextKeyBlock;
_inputSequenceNumber = 0;
_inputEpoch++;
if (_isClient)
{
_inputHasher = _inputCipherSuite.MACAlgorithm.CreateHasher(_inputKeyBlock.ServerWriteMACKey);
_decryptor = _inputCipherSuite.BulkCipherAlgorithm.CreateDecryptor(_inputKeyBlock.ServerWriteKey,
_inputKeyBlock.ServerWriteIV);
_inputKey = _inputKeyBlock.ServerWriteKey;
_inputFixedIV = _inputKeyBlock.ServerWriteIV;
}
else
{
_inputHasher = _inputCipherSuite.MACAlgorithm.CreateHasher(_inputKeyBlock.ClientWriteMACKey);
_decryptor = _inputCipherSuite.BulkCipherAlgorithm.CreateDecryptor(_inputKeyBlock.ClientWriteKey,
_inputKeyBlock.ClientWriteIV);
_inputKey = _inputKeyBlock.ClientWriteKey;
_inputFixedIV = _inputKeyBlock.ClientWriteIV;
}
}
public void SetUp()
{
gameObject = new GameObject();
keyBlock = gameObject.AddComponent <KeyBlock>();
gameObject.AddComponent <BoxCollider2D>();
gameObject.AddComponent <SpriteRenderer>();
keyBlock.Start();
keyBlockReplayer = gameObject.AddComponent <KeyBlockReplayer>();
keyBlockReplayer.Start();
}
public void SetCipherSuite(CipherSuite cipherSuite, ConnectionState connectionState)
{
// Get master secret from connectionState
byte[] masterSecret = connectionState.MasterSecret;
// Generate seed for changing cipher suite
byte[] seed = new byte[64];
Array.Copy(connectionState.ServerRandom, 0, seed, 0, 32);
Array.Copy(connectionState.ClientRandom, 0, seed, 32, 32);
_nextCipherSuite = cipherSuite;
_nextKeyBlock = new KeyBlock(cipherSuite, masterSecret, seed);
}
public RecordHandler(ProtocolVersion version, bool isClient)
{
_isClient = isClient;
// Start with NULL cipher suite and key block
_nextCipherSuite = new CipherSuite(version);
_nextKeyBlock = new KeyBlock();
// Initialize all the other variables
ChangeLocalState();
ChangeRemoteState();
_inputEpoch = 0;
_outputEpoch = 0;
}
public RecordHandler(ProtocolVersion version, bool isClient)
{
_isClient = isClient;
// Start with NULL cipher suite and key block
_nextCipherSuite = new CipherSuite(version);
_nextKeyBlock = new KeyBlock();
// Initialize all the other variables
ChangeLocalState();
ChangeRemoteState();
_inputEpoch = 0;
_outputEpoch = 0;
}
static void StringEncryptDecrypt()
{
KeyBlock encKey = new KeyBlock(64, "SeedPassword123*");
string Original1 = "Some string shorter than 64";
string Original2 = "Some string longer than 64 which is the same as the shorter one but with extra words to make it longer.";
string Original3 = "Some string longer than 64 which is the same as the shorter one but with extra words to make it longer but I want to go all the way past 128.";
Console.WriteLine();
Console.WriteLine(Original1);
Console.WriteLine(Original2);
Console.WriteLine(Original3);
byte[] scrambleBytes1 = EncryptorDecryptor.ScrambleEncrypt(Encoding.UTF8.GetBytes(Original1), encKey);
byte[] scrambleBytes2 = EncryptorDecryptor.ScrambleEncrypt(Encoding.UTF8.GetBytes(Original2), encKey);
byte[] scrambleBytes3 = EncryptorDecryptor.ScrambleEncrypt(Encoding.UTF8.GetBytes(Original3), encKey);
string scrambleString1 = Encoding.UTF8.GetString(scrambleBytes1);
string scrambleString2 = Encoding.UTF8.GetString(scrambleBytes2);
string scrambleString3 = Encoding.UTF8.GetString(scrambleBytes3);
Console.WriteLine();
Console.WriteLine(scrambleString1);
Console.WriteLine(scrambleString2);
Console.WriteLine(scrambleString3);
KeyBlock decKey = new KeyBlock(64, "SeedPassword123*");
byte[] deScrambled1 = EncryptorDecryptor.ScrambleDecrypt(scrambleBytes1, decKey);
byte[] deScrambled2 = EncryptorDecryptor.ScrambleDecrypt(scrambleBytes2, decKey);
byte[] deScrambled3 = EncryptorDecryptor.ScrambleDecrypt(scrambleBytes3, decKey);
string deScrambledString1 = Encoding.UTF8.GetString(deScrambled1);
string deScrambledString2 = Encoding.UTF8.GetString(deScrambled2);
string deScrambledString3 = Encoding.UTF8.GetString(deScrambled3);
Console.WriteLine();
Console.WriteLine(deScrambledString1);
Console.WriteLine(deScrambledString2);
Console.WriteLine(deScrambledString3);
}
public static void KeyBlock(KeyBlock request)
{
}
public void Start()
{
// link components
block = GetComponent <KeyBlock>();
}
public Task PostKeyBlockAsync(KeyBlock block, CancellationToken token = default(CancellationToken)) => _apiClient.PostKeyBlockAsync(block, token);
public void SetCipherSuite(CipherSuite cipherSuite, ConnectionState connectionState)
{
// Get master secret from connectionState
byte[] masterSecret = connectionState.MasterSecret;
// Generate seed for changing cipher suite
byte[] seed = new byte[64];
Array.Copy(connectionState.ServerRandom, 0, seed, 0, 32);
Array.Copy(connectionState.ClientRandom, 0, seed, 32, 32);
_nextCipherSuite = cipherSuite;
_nextKeyBlock = new KeyBlock(cipherSuite, masterSecret, seed);
}
public void GetCurrentKeyBlockTest()
{
KeyBlock k = nativeClient.GetCurrentKeyBlock();
Assert.IsTrue(k.Height > 0);
}
public void ChangeLocalState()
{
_outputCipherSuite = _nextCipherSuite;
_outputKeyBlock = _nextKeyBlock;
_outputSequenceNumber = 0;
_outputEpoch++;
if (_isClient) {
_outputHasher = _outputCipherSuite.MACAlgorithm.CreateHasher(_outputKeyBlock.ClientWriteMACKey);
_encryptor = _outputCipherSuite.BulkCipherAlgorithm.CreateEncryptor(_outputKeyBlock.ClientWriteKey,
_outputKeyBlock.ClientWriteIV);
_outputKey = _outputKeyBlock.ClientWriteKey;
_outputFixedIV = _outputKeyBlock.ClientWriteIV;
} else {
_outputHasher = _outputCipherSuite.MACAlgorithm.CreateHasher(_outputKeyBlock.ServerWriteMACKey);
_encryptor = _outputCipherSuite.BulkCipherAlgorithm.CreateEncryptor(_outputKeyBlock.ServerWriteKey,
_outputKeyBlock.ServerWriteIV);
_outputKey = _outputKeyBlock.ServerWriteKey;
_outputFixedIV = _outputKeyBlock.ServerWriteIV;
}
// IMPORTANT: This needs to be XORed with ie. sequence number to make sure it is unique
_outputRecordIV = new byte[_outputCipherSuite.BulkCipherAlgorithm.RecordIVLength];
RNGCryptoServiceProvider rngCsp = new RNGCryptoServiceProvider();
rngCsp.GetBytes(_outputRecordIV);
}
public static long TotalLength (KeyBlock kb_first, KeyBlock kb_last)
{
return kb_last.last - kb_first.first + 1;
}
public static void PostKeyBlock(this FlatClient client, KeyBlock block) => client.PostKeyBlockAsync(block).RunAndUnwrap();
public void ChangeRemoteState()
{
_inputCipherSuite = _nextCipherSuite;
_inputKeyBlock = _nextKeyBlock;
_inputSequenceNumber = 0;
_inputEpoch++;
if (_isClient) {
_inputHasher = _inputCipherSuite.MACAlgorithm.CreateHasher(_inputKeyBlock.ServerWriteMACKey);
_decryptor = _inputCipherSuite.BulkCipherAlgorithm.CreateDecryptor(_inputKeyBlock.ServerWriteKey,
_inputKeyBlock.ServerWriteIV);
_inputKey = _inputKeyBlock.ServerWriteKey;
_inputFixedIV = _inputKeyBlock.ServerWriteIV;
} else {
_inputHasher = _inputCipherSuite.MACAlgorithm.CreateHasher(_inputKeyBlock.ClientWriteMACKey);
_decryptor = _inputCipherSuite.BulkCipherAlgorithm.CreateDecryptor(_inputKeyBlock.ClientWriteKey,
_inputKeyBlock.ClientWriteIV);
_inputKey = _inputKeyBlock.ClientWriteKey;
_inputFixedIV = _inputKeyBlock.ClientWriteIV;
}
}
