public TlsNullCipher(TlsContext context, IDigest clientWriteDigest, IDigest serverWriteDigest)
{
if (clientWriteDigest == null != (serverWriteDigest == null))
{
throw new TlsFatalAlert(80);
}
this.context = context;
TlsMac tlsMac = null;
TlsMac tlsMac2 = null;
if (clientWriteDigest != null)
{
int num = clientWriteDigest.GetDigestSize() + serverWriteDigest.GetDigestSize();
byte[] key = TlsUtilities.CalculateKeyBlock(context, num);
int num2 = 0;
tlsMac = new TlsMac(context, clientWriteDigest, key, num2, clientWriteDigest.GetDigestSize());
num2 += clientWriteDigest.GetDigestSize();
tlsMac2 = new TlsMac(context, serverWriteDigest, key, num2, serverWriteDigest.GetDigestSize());
num2 += serverWriteDigest.GetDigestSize();
if (num2 != num)
{
throw new TlsFatalAlert(80);
}
}
if (context.IsServer)
{
writeMac = tlsMac2;
readMac = tlsMac;
}
else
{
writeMac = tlsMac;
readMac = tlsMac2;
}
}
public TlsStreamCipher(TlsContext context, IStreamCipher clientWriteCipher, IStreamCipher serverWriteCipher, IDigest clientWriteDigest, IDigest serverWriteDigest, int cipherKeySize, bool usesNonce)
{
bool isServer = context.IsServer;
this.context = context;
this.usesNonce = usesNonce;
encryptCipher = clientWriteCipher;
decryptCipher = serverWriteCipher;
int num = 2 * cipherKeySize + clientWriteDigest.GetDigestSize() + serverWriteDigest.GetDigestSize();
byte[] key = TlsUtilities.CalculateKeyBlock(context, num);
int num2 = 0;
TlsMac tlsMac = new TlsMac(context, clientWriteDigest, key, num2, clientWriteDigest.GetDigestSize());
num2 += clientWriteDigest.GetDigestSize();
TlsMac tlsMac2 = new TlsMac(context, serverWriteDigest, key, num2, serverWriteDigest.GetDigestSize());
num2 += serverWriteDigest.GetDigestSize();
KeyParameter keyParameter = new KeyParameter(key, num2, cipherKeySize);
num2 += cipherKeySize;
KeyParameter keyParameter2 = new KeyParameter(key, num2, cipherKeySize);
num2 += cipherKeySize;
if (num2 != num)
{
throw new TlsFatalAlert(80);
}
ICipherParameters parameters;
ICipherParameters parameters2;
if (isServer)
{
writeMac = tlsMac2;
readMac = tlsMac;
encryptCipher = serverWriteCipher;
decryptCipher = clientWriteCipher;
parameters = keyParameter2;
parameters2 = keyParameter;
}
else
{
writeMac = tlsMac;
readMac = tlsMac2;
encryptCipher = clientWriteCipher;
decryptCipher = serverWriteCipher;
parameters = keyParameter;
parameters2 = keyParameter2;
}
if (usesNonce)
{
byte[] iv = new byte[8];
parameters = new ParametersWithIV(parameters, iv);
parameters2 = new ParametersWithIV(parameters2, iv);
}
encryptCipher.Init(forEncryption: true, parameters);
decryptCipher.Init(forEncryption: false, parameters2);
}
public TlsNullCipher(TlsContext context)
{
this.context = context;
writeMac = null;
readMac = null;
}
public TlsBlockCipher(TlsContext context, IBlockCipher clientWriteCipher, IBlockCipher serverWriteCipher, IDigest clientWriteDigest, IDigest serverWriteDigest, int cipherKeySize)
{
this.context = context;
randomData = new byte[256];
context.NonceRandomGenerator.NextBytes(randomData);
useExplicitIV = TlsUtilities.IsTlsV11(context);
encryptThenMac = context.SecurityParameters.encryptThenMac;
int num = 2 * cipherKeySize + clientWriteDigest.GetDigestSize() + serverWriteDigest.GetDigestSize();
if (!useExplicitIV)
{
num += clientWriteCipher.GetBlockSize() + serverWriteCipher.GetBlockSize();
}
byte[] array = TlsUtilities.CalculateKeyBlock(context, num);
int num2 = 0;
TlsMac tlsMac = new TlsMac(context, clientWriteDigest, array, num2, clientWriteDigest.GetDigestSize());
num2 += clientWriteDigest.GetDigestSize();
TlsMac tlsMac2 = new TlsMac(context, serverWriteDigest, array, num2, serverWriteDigest.GetDigestSize());
num2 += serverWriteDigest.GetDigestSize();
KeyParameter parameters = new KeyParameter(array, num2, cipherKeySize);
num2 += cipherKeySize;
KeyParameter parameters2 = new KeyParameter(array, num2, cipherKeySize);
num2 += cipherKeySize;
byte[] iv;
byte[] iv2;
if (useExplicitIV)
{
iv = new byte[clientWriteCipher.GetBlockSize()];
iv2 = new byte[serverWriteCipher.GetBlockSize()];
}
else
{
iv = Arrays.CopyOfRange(array, num2, num2 + clientWriteCipher.GetBlockSize());
num2 += clientWriteCipher.GetBlockSize();
iv2 = Arrays.CopyOfRange(array, num2, num2 + serverWriteCipher.GetBlockSize());
num2 += serverWriteCipher.GetBlockSize();
}
if (num2 != num)
{
throw new TlsFatalAlert(80);
}
ICipherParameters parameters3;
ICipherParameters parameters4;
if (context.IsServer)
{
mWriteMac = tlsMac2;
mReadMac = tlsMac;
encryptCipher = serverWriteCipher;
decryptCipher = clientWriteCipher;
parameters3 = new ParametersWithIV(parameters2, iv2);
parameters4 = new ParametersWithIV(parameters, iv);
}
else
{
mWriteMac = tlsMac;
mReadMac = tlsMac2;
encryptCipher = clientWriteCipher;
decryptCipher = serverWriteCipher;
parameters3 = new ParametersWithIV(parameters, iv);
parameters4 = new ParametersWithIV(parameters2, iv2);
}
encryptCipher.Init(forEncryption: true, parameters3);
decryptCipher.Init(forEncryption: false, parameters4);
}