protected override ICryptoValue DecryptInternal(ArraySegment <byte> cipherBytes, CancellationToken cancellationToken)
{
var cipher = GetBytes(cipherBytes);
var ctx = new SM4Context {
IsPadding = true, Mode = SM4Core.SM4_DECRYPT
};
var sm4 = new SM4Core();
sm4.sm4_setkey_dec(ctx, Key.GetKey());
var original = sm4.sm4_crypt_cbc(ctx, Key.GetIV(), cipher);
return(CreateCryptoValue(original, cipher, CryptoMode.Decrypt));
}
protected override ICryptoValue EncryptInternal(ArraySegment <byte> originalBytes, CancellationToken cancellationToken)
{
var original = GetBytes(originalBytes);
var ctx = new SM4Context {
IsPadding = true, Mode = SM4Core.SM4_ENCRYPT
};
var sm4 = new SM4Core();
sm4.sm4_setkey_enc(ctx, Key.GetKey());
var cipher = sm4.sm4_crypt_cbc(ctx, Key.GetIV(), original); //CBC MODE
return(CreateCryptoValue(original, cipher, CryptoMode.Encrypt));
}