/// <summary>
/// SM4 ECB模式加密，由EncodeBySM4方法调用
/// </summary>
/// <param name="plainText"></param>
/// <returns></returns>
private String Encrypt_ECB(String plainText)
{
SM4_Context ctx = new SM4_Context();
ctx.isPadding = true;
ctx.mode = SM4.SM4_ENCRYPT;
byte[] keyBytes;
if (HexString)
{
keyBytes = Hex.Decode(SecretKey);
}
else
{
keyBytes = Encoding.UTF8.GetBytes(SecretKey);
}
SM4 sm4 = new SM4();
sm4.sm4_setkey_enc(ctx, keyBytes);
byte[] encrypted = sm4.sm4_crypt_ecb(ctx, Encoding.UTF8.GetBytes(plainText));
return(Convert.ToBase64String(encrypted));
}
/// <summary>
/// SM4 ECB模式解密 由DecodeBySM4调用
/// </summary>
/// <param name="cipherText"></param>
/// <returns></returns>
private 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.UTF8.GetBytes(SecretKey);
}
SM4 sm4 = new SM4();
sm4.sm4_setkey_dec(ctx, keyBytes);
byte[] decrypted = sm4.sm4_crypt_ecb(ctx, Convert.FromBase64String(cipherText));
return(Encoding.UTF8.GetString(decrypted));
}