protected virtual void Dispose(bool disposing)
{
if (disposing)
{
_disposed = true;
_readCipher?.Dispose();
_readCipher = null;
CipherLib?.Dispose();
CipherLib = null;
}
}
private void ProcessStreamControl(EncryptedStreamControl sc)
{
switch (sc)
{
case EncryptedStreamControl.EncryptRSA:
{
if (!CipherLib.ContainsKey("rsa-private"))
{
throw new SecureChannelException("RSA certificate is required.");
}
ReadCipher = CipherLib["rsa-private"].Clone();
break;
}
case EncryptedStreamControl.EncryptXOR:
{
var passwLen = ReadUInt16();
if (passwLen != 0)
{
var passw = ReadData(passwLen);
CipherLib["xor"] = new XorCipher(passw);
}
ReadStream.Cipher = CipherLib["xor"].Clone();
break;
}
case EncryptedStreamControl.EncryptAES:
{
var passwLen = ReadUInt16();
if (passwLen != 0)
{
var passw = ReadData(passwLen);
CipherLib["aes"] = new Aes256Cipher(passw);
}
ReadCipher = CipherLib["aes"].Clone();
break;
}
default:
throw new StreamControlException("Unknown StreamControl command");
}
}
public void Encrypt(bool reset = false)
{
if (reset)
{
WriteStream.Cipher = new XorCipher();
WriteCipher = null;
}
if (CipherLib.ContainsKey("rsa-public"))
{
WriteUInt16((ushort)EncryptedStreamControl.EncryptRSA);
WriteCipher = CipherLib["rsa-public"].Clone();
}
byte[] salt = Random.Get(32);
WriteUInt16((ushort)EncryptedStreamControl.EncryptAES);
WriteUInt16((ushort)salt.Length);
WriteData(salt);
CipherLib["aes"] = new Aes256Cipher(salt);
WriteCipher = CipherLib["aes"].Clone();
if (!CipherLib.ContainsKey("xor"))
{
byte[] passw = Random.Get(2048 / 8);
WriteUInt16((ushort)EncryptedStreamControl.EncryptXOR);
WriteUInt16((ushort)passw.Length);
WriteData(passw);
CipherLib["xor"] = new XorCipher(passw);
}
else
{
WriteUInt16((ushort)EncryptedStreamControl.EncryptXOR);
WriteUInt16((ushort)0);
}
WriteStream.Cipher = CipherLib["xor"].Clone();
}
