protected override void InitCipher(byte[] iv, bool isEncrypt)
{
base.InitCipher(iv, isEncrypt);
_crypto?.Dispose();
if (cipherFamily == CipherFamily.Rc4Md5)
{
Span <byte> temp = stackalloc byte[keyLen + ivLen];
var realKey = new byte[MD5Length];
key.CopyTo(temp);
iv.CopyTo(temp.Slice(keyLen));
MD5Utils.Fast440(temp, realKey);
_crypto = StreamCryptoCreate.Rc4(realKey);
return;
}
_crypto = cipherFamily switch
{
CipherFamily.AesCfb => StreamCryptoCreate.AesCfb(isEncrypt, key, iv),
CipherFamily.Chacha20 => StreamCryptoCreate.ChaCha20(key, iv),
CipherFamily.Rc4 => StreamCryptoCreate.Rc4(key),
_ => throw new NotSupportedException()
};
}
public void Test(string keyHex, int originSize, string hex, string hex2)
{
var key = keyHex.FromHex();
Test(new BcRC4Crypto(key), originSize, hex, hex2);
Test(StreamCryptoCreate.Rc4(key), originSize, hex, hex2);
}
public void RC4()
{
Test(StreamCryptoCreate.Rc4(_randomKey), _randombytes.Span);
}
protected override IStreamCrypto CreateCrypto(bool isEncrypt, ReadOnlySpan <byte> key, ReadOnlySpan <byte> iv)
{
return(StreamCryptoCreate.Rc4(key));
}
