sm2 对接java 和前端时 04问题

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    public class SM2CryptoUtil
    {
        public SM2CryptoUtil(byte[] pubkey, byte[] privkey, Mode mode)
        {
            this.pubkey = pubkey;
            this.privkey = privkey;
            this.mode = mode;
        }
        public SM2CryptoUtil(string pubkey, string privkey, Mode mode = Mode.C1C2C3, bool isPkcs8 = false)
        {
            if (!isPkcs8)
            {
                if (pubkey != null) this.pubkey = Decode(pubkey);
                if (privkey != null) this.privkey = Decode(privkey);
            }
            else
            {
                if (pubkey != null) this.pubkey = ((ECPublicKeyParameters)PublicKeyFactory.CreateKey(Convert.FromBase64String(pubkey))).Q.GetEncoded();
                if (privkey != null) this.privkey = ((ECPrivateKeyParameters)PrivateKeyFactory.CreateKey(Convert.FromBase64String(privkey))).D.ToByteArray();
            }
            this.mode = mode;
        }
        byte[] pubkey;
        byte[] privkey;
        Mode mode;
        ICipherParameters _privateKeyParameters;
        ICipherParameters PrivateKeyParameters
        {
            get
            {
                var r = _privateKeyParameters;
                if (r == null) r = _privateKeyParameters = new ECPrivateKeyParameters(new BigInteger(1, privkey), new ECDomainParameters(GMNamedCurves.GetByName("SM2P256V1")));
                return r;
            }
        }
        ICipherParameters _publicKeyParameters;
        ICipherParameters PublicKeyParameters
        {
            get
            {
                var r = _publicKeyParameters;
                if (r == null)
                {
                    var x9ec = GMNamedCurves.GetByName("SM2P256V1");
                    r = _publicKeyParameters = new ECPublicKeyParameters(x9ec.Curve.DecodePoint(pubkey), new ECDomainParameters(x9ec));
                }
                return r;
            }
        }

        public static void GenerateKeyHex(out string pubkey, out string privkey)
        {
            GenerateKey(out var a, out var b);
            pubkey = Hex.ToHexString(a);
            privkey = Hex.ToHexString(b);
        }
        public static void GenerateKey(out byte[] pubkey, out byte[] privkey)
        {
            var g = new ECKeyPairGenerator();
            g.Init(new ECKeyGenerationParameters(new ECDomainParameters(GMNamedCurves.GetByName("SM2P256V1")), new SecureRandom()));
            var k = g.GenerateKeyPair();
            pubkey = ((ECPublicKeyParameters)k.Public).Q.GetEncoded(false);
            privkey = ((ECPrivateKeyParameters)k.Private).D.ToByteArray();
        }

        public byte[] Decrypt(byte[] data)
        {
            if (mode == Mode.C1C3C2) data = C132ToC123(data);
            var sm2 = new SM2Engine(new SM3Digest());
            sm2.Init(false, this.PrivateKeyParameters);
            return sm2.ProcessBlock(data, 0, data.Length);
        }
        public byte[] Encrypt(byte[] data)
        {
            var sm2 = new SM2Engine(new SM3Digest());
            sm2.Init(true, new ParametersWithRandom(PublicKeyParameters));
            data = sm2.ProcessBlock(data, 0, data.Length);
            if (mode == Mode.C1C3C2) data = C123ToC132(data);
            return data;
        }

        public byte[] Encrypt(string msg, byte[] data)
        {
            var sm2 = new SM2Engine(new SM3Digest());
            var mw = Hex.DecodeStrict(msg);
            var newPubkey = pubkey;
            //        if (pubkey.Length>128)
            //        {
            //            newPubkey = pubkey.Skip(0).Take(128).ToArray();

            //            var  xHex = newPubkey.Skip(0).Take(64).ToArray();
            //            var yHex = newPubkey.Skip(0).Take(64).ToArray();

            //            publicKey = cipher.createPoint(xHex, yHex);

            //            let c1 = cipher.initEncipher(publicKey);

            //            cipher.encryptBlock(msg);
            //            let c2 = _.arrayToHex(msg);

            //            let c3 = new Array(32);
            //            cipher.doFinal(c3)
            //c3 = _.arrayToHex(c3);

            //            return cipherMode === C1C2C3 ? c1 + c2 + c3 : c1 + c3 + c2;


            //        }
            sm2.Init(true, new ParametersWithRandom(PublicKeyParameters));
            data = sm2.ProcessBlock(data, 0, data.Length);



            if (mode == Mode.C1C3C2) data = C123ToC132(data);
            return data;
        }

        public byte[] Sign(byte[] msg, byte[] id = null)
        {
            var sm2 = new SM2Signer(new SM3Digest());
            ICipherParameters cp;
            if (id != null) cp = new ParametersWithID(new ParametersWithRandom(PrivateKeyParameters), id);
            else cp = new ParametersWithRandom(PrivateKeyParameters);
            sm2.Init(true, cp);
            sm2.BlockUpdate(msg, 0, msg.Length);
            return sm2.GenerateSignature();
        }
        public bool VerifySign(byte[] msg, byte[] signature, byte[] id = null)
        {
            var sm2 = new SM2Signer(new SM3Digest());
            ICipherParameters cp;
            if (id != null) cp = new ParametersWithID(PublicKeyParameters, id);
            else cp = PublicKeyParameters;
            sm2.Init(false, cp);
            sm2.BlockUpdate(msg, 0, msg.Length);
            return sm2.VerifySignature(signature);
        }
        static byte[] C123ToC132(byte[] c1c2c3)
        {
            var gn = GMNamedCurves.GetByName("SM2P256V1");
            int c1Len = (gn.Curve.FieldSize + 7) / 8 * 2 + 1;
            int c3Len = 32;
            byte[] result = new byte[c1c2c3.Length];
            Array.Copy(c1c2c3, 0, result, 0, c1Len); //c1
            Array.Copy(c1c2c3, c1c2c3.Length - c3Len, result, c1Len, c3Len); //c3
            Array.Copy(c1c2c3, c1Len, result, c1Len + c3Len, c1c2c3.Length - c1Len - c3Len); //c2
            return result;
        }
        static byte[] C132ToC123(byte[] c1c3c2)
        {
            var gn = GMNamedCurves.GetByName("SM2P256V1");
            int c1Len = (gn.Curve.FieldSize + 7) / 8 * 2 + 1;
            int c3Len = 32;
            byte[] result = new byte[c1c3c2.Length];
            Array.Copy(c1c3c2, 0, result, 0, c1Len); //c1: 0->65
            Array.Copy(c1c3c2, c1Len + c3Len, result, c1Len, c1c3c2.Length - c1Len - c3Len); //c2
            Array.Copy(c1c3c2, c1Len, result, c1c3c2.Length - c3Len, c3Len); //c3
            return result;
        }
        static byte[] Decode(string key)
        {
            return Regex.IsMatch(key, "^[0-9a-f]+$", RegexOptions.IgnoreCase) ? Hex.Decode(key) : Convert.FromBase64String(key);
        }
        public enum Mode
        {
            C1C2C3, C1C3C2
        }
    }

        public void test()
        { 
            //这种方式可以适配   在线 加密内容 https://the-x.cn/cryptography/Sm2.aspx
            //加密
            var prikey = Hex.DecodeStrict(PRIVATE_KEY);
            var pubkey = Hex.DecodeStrict(PUBLIC_KEY);
            SM2CryptoUtil sM2CryptoUtil = new SM2CryptoUtil(pubkey, prikey, SM2CryptoUtil.Mode.C1C3C2);
            var dt = sM2CryptoUtil.Encrypt(Encoding.UTF8.GetBytes("admin123"));
            var hex = Hex.ToHexString(dt);

            var ce = Encoding.UTF8.GetString(dt);
          
            String image = Base64.ToBase64String(dt);


            //解密
            var jm = sM2CryptoUtil.Decrypt(Hex.DecodeStrict(hex));
            var jg = Encoding.UTF8.GetString(jm);



            var pp = "BN3Cwq9XYduzYmBVBPk222pGMHoX/5iSKB/i6XmgO0xk6/pNvf+Kpz1g3AERzAY+R1NumSLieNYLXgqb+nJF55TCbX0Na96csH4m9Z+CReSe/3ZAjv6Sz/0neiGIlR0Uy5sb1TTnynBQ";
            var nr = Convert.FromBase64String(pp);
            var jm1 = sM2CryptoUtil.Decrypt(nr);
            var jg1 = Encoding.UTF8.GetString(jm1);

            // 这种方式 适配 前端 和java 调用的  sm-crypto 插件 解决方法 补充04 或者 减少04
            var pp2 = "048d842a5a958a5397b6c2a85509f1fae6b28f39489d29aba5d080b8460a5018d546017690cc938c5266dbe1ecc5ca0f630d36552960d9ca4361a3d83d1813ded86f7abbcc7a08d491e9b61ab7d586a50c60d39b24ae928cb55f5868d4af9d9bf3a9002c7474d5e0b2"; 
            var jm2 = sM2CryptoUtil.Decrypt(Hex.DecodeStrict(pp2));
            var jg2 = Encoding.UTF8.GetString(jm2);
        }

        public void test()
        {
            
            //这种方式可以适配   在线 加密内容 https://the-x.cn/cryptography/Sm2.aspx
            //加密
            var prikey = Hex.DecodeStrict(PRIVATE_KEY);
            var pubkey = Hex.DecodeStrict(PUBLIC_KEY);
            SM2CryptoUtil sM2CryptoUtil = new SM2CryptoUtil(pubkey, prikey, SM2CryptoUtil.Mode.C1C3C2);
            var dt = sM2CryptoUtil.Encrypt(Encoding.UTF8.GetBytes("admin123"));
            var hex = Hex.ToHexString(dt);

            var ce = Encoding.UTF8.GetString(dt);
          
            String image = Base64.ToBase64String(dt);


            //解密
            var jm = sM2CryptoUtil.Decrypt(Hex.DecodeStrict(hex));
            var jg = Encoding.UTF8.GetString(jm);



            var pp = "BN3Cwq9XYduzYmBVBPk222pGMHoX/5iSKB/i6XmgO0xk6/pNvf+Kpz1g3AERzAY+R1NumSLieNYLXgqb+nJF55TCbX0Na96csH4m9Z+CReSe/3ZAjv6Sz/0neiGIlR0Uy5sb1TTnynBQ";
            var nr = Convert.FromBase64String(pp);
            var jm1 = sM2CryptoUtil.Decrypt(nr);
            var jg1 = Encoding.UTF8.GetString(jm1);

            // 这种方式 适配 前端 和java 调用的  sm-crypto 插件 解决方法 补充04 或者 减少04
            var pp2 = "048d842a5a958a5397b6c2a85509f1fae6b28f39489d29aba5d080b8460a5018d546017690cc938c5266dbe1ecc5ca0f630d36552960d9ca4361a3d83d1813ded86f7abbcc7a08d491e9b61ab7d586a50c60d39b24ae928cb55f5868d4af9d9bf3a9002c7474d5e0b2"; 
            var jm2 = sM2CryptoUtil.Decrypt(Hex.DecodeStrict(pp2));
            var jg2 = Encoding.UTF8.GetString(jm2);
        }

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