public String DecryptCBC(String cipherText)
{
SM4Context ctx = new SM4Context();
ctx.isPadding = true;
ctx.mode = SM4CryptoServiceProvider.SM4_DECRYPT;
byte[] keyBytes;
byte[] ivBytes;
if (hexString)
{
keyBytes = Hex.Decode(secretKey);
ivBytes = Hex.Decode(iv);
}
else
{
keyBytes = Encoding.UTF8.GetBytes(secretKey);
ivBytes = Encoding.UTF8.GetBytes(iv);
}
SM4CryptoServiceProvider sm4 = new SM4CryptoServiceProvider();
sm4.sm4_setkey_dec(ctx, keyBytes);
byte[] decrypted = sm4.sm4_crypt_cbc(ctx, ivBytes, Hex.Decode(cipherText));
return(Encoding.UTF8.GetString(decrypted));
}
public String EncryptECB(String plainText)
{
SM4Context ctx = new SM4Context();
ctx.isPadding = true;
ctx.mode = SM4CryptoServiceProvider.SM4_ENCRYPT;
byte[] keyBytes;
if (hexString)
{
keyBytes = Hex.Decode(secretKey);
}
else
{
keyBytes = Encoding.UTF8.GetBytes(secretKey);
}
SM4CryptoServiceProvider sm4 = new SM4CryptoServiceProvider();
sm4.sm4_setkey_enc(ctx, keyBytes);
byte[] encrypted = sm4.sm4_crypt_ecb(ctx, Encoding.UTF8.GetBytes(plainText));
String cipherText = Encoding.UTF8.GetString(Hex.Encode(encrypted));
return(cipherText);
}
