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 MD5DigestTest(string str, string md5Str)
{
MD5DigestTest(new DefaultMD5Digest(), str, md5Str);
MD5DigestTest(new BcMD5Digest(), str, md5Str);
MD5DigestTest(new MD5Digest(), str, md5Str);
Span <byte> hash = stackalloc byte[HashConstants.Md5Length];
MD5Utils.Fast440(Encoding.UTF8.GetBytes(str), hash);
Assert.AreEqual(md5Str, hash.ToHex());
}
public void Fast440()
{
Span <byte> hash = stackalloc byte[HashConstants.Md5Length];
MD5Utils.Fast440(_randombytes.Span, hash);
}