Beispiel #1
0
        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.ASCII.GetString(Hex.Encode(encryptedData));

            byte[] c1Bytes = Hex.Decode(Encoding.ASCII.GetBytes(data.Substring(0, 130)));
            int    c2Len   = encryptedData.Length - 97;

            byte[] c2 = Hex.Decode(Encoding.ASCII.GetBytes(data.Substring(130, 2 * c2Len)));
            byte[] c3 = Hex.Decode(Encoding.ASCII.GetBytes(data.Substring(130 + 2 * c2Len, 64)));

            SM2        sm2   = SM2.Instance;
            BigInteger userD = new BigInteger(1, privateKey);

            //ECPoint c1 = sm2.ecc_curve.DecodePoint(c1Bytes);

            ECPoint c1     = sm2.ecc_curve.DecodePoint(c1Bytes);
            Cipher  cipher = new Cipher();

            cipher.Init_dec(userD, c1);
            cipher.Decrypt(c2);
            cipher.Dofinal(c3);

            return(c2);
        }
Beispiel #2
0
        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);

            Cipher cipher = new Cipher();
            SM2    sm2    = SM2.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.ASCII.GetString(Hex.Encode(c1.GetEncoded()));
            String sc2 = Encoding.ASCII.GetString(Hex.Encode(source));
            String sc3 = Encoding.ASCII.GetString(Hex.Encode(c3));

            return((sc1 + sc2 + sc3).ToUpper());
        }
Beispiel #3
0
        public ECPoint Init_enc(SM2 sm2, ECPoint userKey)
        {
            AsymmetricCipherKeyPair key    = sm2.ecc_key_pair_generator.GenerateKeyPair();
            ECPrivateKeyParameters  ecpriv = (ECPrivateKeyParameters)key.Private;
            ECPublicKeyParameters   ecpub  = (ECPublicKeyParameters)key.Public;
            BigInteger k  = ecpriv.D;
            ECPoint    c1 = ecpub.Q;

            this.p2 = userKey.Multiply(k);
            Reset();
            return(c1);
        }
Beispiel #4
0
        public static void GenerateKeyPair(out ECPoint pubk, out BigInteger prik)
        {
            SM2 sm2 = SM2.Instance;
            AsymmetricCipherKeyPair key    = sm2.ecc_key_pair_generator.GenerateKeyPair();
            ECPrivateKeyParameters  ecpriv = (ECPrivateKeyParameters)key.Private;
            ECPublicKeyParameters   ecpub  = (ECPublicKeyParameters)key.Public;
            BigInteger privateKey          = ecpriv.D;
            ECPoint    publicKey           = ecpub.Q;

            //System.Console.Out.WriteLine("公钥: " + Encoding.ASCII.GetString(Hex.Encode(publicKey.GetEncoded())).ToUpper());
            //System.Console.Out.WriteLine("私钥: " + Encoding.ASCII.GetString(Hex.Encode(privateKey.ToByteArray())).ToUpper());
            pubk = publicKey;
            prik = privateKey;
        }