public string Decrypt_ECB(string cipherText)
{
SM4_Context ctx = new SM4_Context();
ctx.isPadding = true;
ctx.mode = SM4.SM4_DECRYPT;
byte[] keyBytes;
if (hexString)
{
keyBytes = Hex.Decode(secretKey);
}
else
{
keyBytes = Encoding.ASCII.GetBytes(secretKey);
}
SM4 sm4 = new SM4();
sm4.sm4_setkey_dec(ctx, keyBytes);
byte[] decrypted = sm4.sm4_crypt_ecb(ctx, Hex.Decode(cipherText));
if (decrypted == null)
{
return(string.Empty);
}
else
{
return(Encoding.Default.GetString(decrypted));
}
}
public string Decrypt_CBC(string cipherData)
{
SM4_Context ctx = new SM4_Context();
ctx.isPadding = true;
ctx.mode = SM4.SM4_DECRYPT;
byte[] keyBytes;
byte[] ivBytes;
if (hexString)
{
keyBytes = Hex.Decode(secretKey);
ivBytes = Hex.Decode(iv);
}
else
{
keyBytes = Encoding.Default.GetBytes(secretKey);
ivBytes = Encoding.Default.GetBytes(iv);
}
SM4 sm4 = new SM4();
sm4.sm4_setkey_dec(ctx, keyBytes);
byte[] decrypted = sm4.sm4_crypt_cbc(ctx, ivBytes, Hex.Decode(cipherData));
if (decrypted == null)
{
return(string.Empty);
}
else
{
return(Encoding.Default.GetString(decrypted));
}
//return decrypted;
}