public static BigInteger CalculateDiffieHellmanSharedKey(string publicKey)
{
try
{
byte[] cbytes = Converter.HexStringToBytes(publicKey);
byte[] publicKeyBytes = Rsa.Verify(cbytes);
string publicKeyString = Encoding.Default.GetString(publicKeyBytes);
return(DiffieHellman.CalculateSharedKey(new BigInteger(publicKeyString, 10)));
}
catch
{
return(0);
}
}
public static BigInteger CalculateDiffieHellmanSharedKey(string publicKey)
{
try
{
var cbytes = EncryptionUtilities.HexStringToBytes(publicKey);
var publicKeyBytes = Rsa.Verify(cbytes);
var publicKeyString = Encoding.Default.GetString(publicKeyBytes);
return(DiffieHellman.CalculateSharedKey(new BigInteger(publicKeyString, 10)));
}
catch
{
return(0);
}
}
private static void TestHabboEncryption(bool consoleOutput, int dhBitLength, int rsaBitLength)
{
RSACrypto serverRsa = new RSACrypto(RSACParameters.FromXmlFile(@"rsa.keys"));
DiffieHellman serverDh = DiffieHellman.CreateInstance(dhBitLength);
string serverDhPrimeRsa = signDiffieHellmanKeys(serverDh.P, serverRsa);
string serverDhGenRsa = signDiffieHellmanKeys(serverDh.G, serverRsa);
RSACrypto clientRsa = new RSACrypto(new RSACParameters(_modules, _exponent));
BigInteger clientDhPrime = verifyDiffieHellmanKeys(serverDhPrimeRsa, clientRsa);
BigInteger clientDhGen = verifyDiffieHellmanKeys(serverDhGenRsa, clientRsa);
DiffieHellman clientDh = new DiffieHellman(dhBitLength, clientDhPrime, clientDhGen);
if (!clientDh.P.Equals(serverDh.P))
{
throw new Exception("HabboEncryption test FAILED, P keys are not equal!");
}
if (!clientDh.G.Equals(serverDh.G))
{
throw new Exception("HabboEncryption test FAILED, G keys are not equal!");
}
string serverDhPublicRsa = signDiffieHellmanKeys(serverDh.PublicKey, serverRsa);
string clientDhPublicRsa = encryptDiffieHellmanKeys(clientDh.PublicKey, clientRsa);
BigInteger serverDhClientPublic = decryptDiffieHellmanKeys(clientDhPublicRsa, serverRsa);
BigInteger clientDhServerPublic = verifyDiffieHellmanKeys(serverDhPublicRsa, clientRsa);
if (!clientDhServerPublic.Equals(serverDh.PublicKey))
{
throw new Exception("HabboEncryption test FAILED, server -> client public keys are not equal!");
}
if (!serverDhClientPublic.Equals(clientDh.PublicKey))
{
throw new Exception("HabboEncryption test FAILED, server <- client public keys are not equal!");
}
BigInteger serverDhShared = serverDh.CalculateSharedKey(serverDhClientPublic);
BigInteger clientDhShared = clientDh.CalculateSharedKey(clientDhServerPublic);
if (!serverDhShared.Equals(clientDhShared))
{
throw new Exception("HabboEncryption test FAILED, shared keys are not equal!");
}
}
public static BigInteger CalculateDiffieHellmanSharedKey(string publicKey)
{
try
{
byte[] bytes = BigInteger.Parse('0' + publicKey, NumberStyles.HexNumber).ToByteArray();
byte[] keyBytes = Rsa.Verify(bytes);
string keyString = Encoding.Default.GetString(keyBytes);
return(DiffieHellman.CalculateSharedKey(BigInteger.Parse(keyString)));
}
catch
{
Writer.LogCriticalException("Sorry, the Encryption Handler stopped Inesperatelly. Please Restart Emulator.");
return(0);
}
}
public static BigInteger CalculateDiffieHellmanSharedKey(string publicKey)
{
try
{
byte[] bytes = BigInteger.Parse('0' + publicKey, NumberStyles.HexNumber).ToByteArray();
byte[] keyBytes = Rsa.Verify(bytes);
string keyString = Encoding.Default.GetString(keyBytes);
return(DiffieHellman.CalculateSharedKey(BigInteger.Parse(keyString)));
}
catch (Exception e)
{
YupiLogManager.LogCriticalException(e, "Encryption System Crashed.", "Yupi.Users");
return(0);
}
}
