public static String Encrypt(byte[] publicKey, byte[] data)
{
if (null == publicKey || publicKey.Length == 0)
{
return(null);
}
if (data == null || data.Length == 0)
{
return(null);
}
byte[] source = new byte[data.Length];
Array.Copy(data, 0, source, 0, data.Length);
SM2Cipher cipher = new SM2Cipher();
SM2CryptoServiceProvider sm2 = SM2CryptoServiceProvider.Instance;
ECPoint userKey = sm2.ecc_curve.DecodePoint(publicKey);
ECPoint c1 = cipher.Init_enc(sm2, userKey);
cipher.Encrypt(source);
byte[] c3 = new byte[32];
cipher.Dofinal(c3);
String sc1 = Encoding.UTF8.GetString(Hex.Encode(c1.GetEncoded()));
String sc2 = Encoding.UTF8.GetString(Hex.Encode(source));
String sc3 = Encoding.UTF8.GetString(Hex.Encode(c3));
return((sc1 + sc2 + sc3).ToUpper());
}
public static byte[] Decrypt(byte[] privateKey, byte[] encryptedData)
{
if (null == privateKey || privateKey.Length == 0)
{
return(null);
}
if (encryptedData == null || encryptedData.Length == 0)
{
return(null);
}
String data = Encoding.UTF8.GetString(Hex.Encode(encryptedData));
byte[] c1Bytes = Hex.Decode(Encoding.UTF8.GetBytes(data.Substring(0, 130)));
int c2Len = encryptedData.Length - 97;
byte[] c2 = Hex.Decode(Encoding.UTF8.GetBytes(data.Substring(130, 2 * c2Len)));
byte[] c3 = Hex.Decode(Encoding.UTF8.GetBytes(data.Substring(130 + 2 * c2Len, 64)));
SM2CryptoServiceProvider sm2 = SM2CryptoServiceProvider.Instance;
BigInteger userD = new BigInteger(1, privateKey);
ECPoint c1 = sm2.ecc_curve.DecodePoint(c1Bytes);
SM2Cipher cipher = new SM2Cipher();
cipher.Init_dec(userD, c1);
cipher.Decrypt(c2);
cipher.Dofinal(c3);
return(c2);
}