C# SM2 加签、验签工具

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效果

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效果

项目

代码

using Org.BouncyCastle.Crypto.Parameters;
using Org.BouncyCastle.Crypto.Signers;
using Org.BouncyCastle.Asn1.GM;
using System;
using System.Text;
using System.Windows.Forms;
using Org.BouncyCastle.Asn1.X9;
using Org.BouncyCastle.Utilities.Encoders;
using Org.BouncyCastle.Math;
using Org.BouncyCastle.Crypto.Generators;
using Org.BouncyCastle.Security;
using System.Linq;

namespace SM2VerifySignTool
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        int toDigit(char ch, int index)
        {
            int digit = Convert.ToInt32(ch.ToString(), 16);
            if (digit == -1)
            {
                throw new SystemException("Illegal hexadecimal character " + ch + " at index " + index);
            }
            return digit;
        }

        string HexToBase64(string hexString)
        {
            byte[] bytes = Enumerable.Range(0, hexString.Length)
                                     .Where(x => x % 2 == 0)
                                     .Select(x => Convert.ToByte(hexString.Substring(x, 2), 16))
                                     .ToArray();
            return Convert.ToBase64String(bytes);
        }

        byte[] hexStrToByte(String hexStr)
        {
            if ((null == hexStr) || (hexStr.Length == 0))
            {
                return null;
            }
            char[] hexData = hexStr.ToCharArray();
            int len = hexData.Length;
            if ((len & 0x1) != 0)
            {
                throw new SystemException("Odd number of characters.");
            }
            byte[] out1 = new byte[len >> 1];

            int i = 0;
            for (int j = 0; j < len; i++)
            {
                int f = toDigit(hexData[j], j) << 4;
                j++;
                f |= toDigit(hexData[j], j);
                j++;
                out1[i] = ((byte)(f & 0xFF));
            }
            return out1;
        }

        X9ECParameters x9ec = GMNamedCurves.GetByName("SM2P256V1");


        /**
        *生成
        */
        void GenerateKey(out string pubkeyStr, out string prikeyStr)
        {
            var g = new ECKeyPairGenerator();
            g.Init(new ECKeyGenerationParameters(new ECDomainParameters(x9ec), new SecureRandom()));
            var k = g.GenerateKeyPair();
            byte[] pubkey = ((ECPublicKeyParameters)k.Public).Q.GetEncoded(false);
            byte[] privkey = ((ECPrivateKeyParameters)k.Private).D.ToByteArray();
            prikeyStr = BitConverter.ToString(privkey).Replace("-", "");
            pubkeyStr = BitConverter.ToString(pubkey).Replace("-", "");
        }

        /**
        *加签
        */
        string Sign(string prikeyStr, string data)
        {
            byte[] msg = Encoding.UTF8.GetBytes(data);
            byte[] priKey = hexStrToByte(prikeyStr);
            SM2Signer sm2Signer = new SM2Signer();
            ECPrivateKeyParameters privateKeyParameters = new ECPrivateKeyParameters(new BigInteger(1, priKey), new ECDomainParameters(x9ec));

            sm2Signer.Init(true, privateKeyParameters);
            sm2Signer.BlockUpdate(msg, 0, msg.Length);
            return Hex.ToHexString(sm2Signer.GenerateSignature());
        }


        /*
        * 验签
        */
        bool verifySign(string pubkeyStr, string data, string sign)
        {
            byte[] signHex = hexStrToByte(sign);
            byte[] pubkey = hexStrToByte(pubkeyStr);
            byte[] msgByte = Encoding.UTF8.GetBytes(data);
            SM2Signer sm2Signer = new SM2Signer();
            ECPublicKeyParameters publicKeyParameters = new ECPublicKeyParameters(x9ec.Curve.DecodePoint(pubkey), new ECDomainParameters(x9ec));
            sm2Signer.Init(false, publicKeyParameters);
            sm2Signer.BlockUpdate(msgByte, 0, msgByte.Length);
            return sm2Signer.VerifySignature(signHex);
        }

        private void btnVerify_Click(object sender, EventArgs e)
        {
            txtResult.Text = "";
            try
            {
                string pubk = txtPubkey.Text;
                string data = txtData.Text;
                string sign = txtSign.Text;
                bool b = verifySign(pubk, data, sign);
                if (b)
                {
                    txtResult.Text = "验证成功";
                }
                else
                {
                    txtResult.Text = "验证失败";
                }
            }
            catch (Exception ex)
            {
                txtResult.Text = "验证异常:" + ex.Message;
            }
        }

        ///


        /// Base64字符串转Hex字符串↓
        ///
        ///
        ///
        private void button1_Click(object sender, EventArgs e)
        {
            try
            {
                byte[] bytes = Convert.FromBase64String(txtBase64.Text); // 将base64字符串转换为byte数组
                string hexString = BitConverter.ToString(bytes).Replace("-", ""); // 将byte数组转换为Hex字符串
                txtHex.Text = hexString;
            }
            catch (Exception ex)
            {
                txtHex.Text = "转换异常:" + ex.Message;
            }
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            //string pubkeyStr = "";
            //string prikeyStr = "";
            //GenerateKey(out pubkeyStr, out prikeyStr);
            //txtPriKey.Text = prikeyStr;
            //txtPubkey.Text = pubkeyStr;
        }

        private void button2_Click(object sender, EventArgs e)
        {
            try
            {
                string prik = txtPriKey.Text;
                string data = txtData.Text;
                txtSign.Text = Sign(prik, data);
            }
            catch (Exception ex)
            {
                txtSign.Text = "加签识别:" + ex.Message;
            }
        }

        private void button3_Click(object sender, EventArgs e)
        {
            string pubkeyStr = "";
            string prikeyStr = "";
            GenerateKey(out pubkeyStr, out prikeyStr);
            txtPriKey.Text = prikeyStr;
            txtPubkey.Text = pubkeyStr;
        }

        private void button4_Click(object sender, EventArgs e)
        {
            try
            {
                string hexString = txtHex.Text;
                string base64String = HexToBase64(hexString);
                txtBase64.Text = base64String;
            }
            catch (Exception ex)
            {
                txtBase64.Text = "转换异常:" + ex.Message;
            }
        }

        private void button5_Click(object sender, EventArgs e)
        {
            try
            {
                string originalString = txtStr.Text;
                byte[] bytes = System.Text.Encoding.UTF8.GetBytes(originalString);
                string base64String = Convert.ToBase64String(bytes);
                txtBase64.Text = base64String;
            }
            catch (Exception ex)
            {
                txtBase64.Text = "编码异常:" + ex.Message;
            }
        }

        private void button6_Click(object sender, EventArgs e)
        {
            try
            {
                string base64String = txtBase64.Text;
                byte[] bytes = Convert.FromBase64String(base64String);
                string decodedString = Encoding.UTF8.GetString(bytes);
                txtStr.Text = decodedString;
            }
            catch (Exception ex)
            {
                txtStr.Text = "解码异常:" + ex.Message;
            }
        }
    }
}
 

  1. using Org.BouncyCastle.Crypto.Parameters;
  2. using Org.BouncyCastle.Crypto.Signers;
  3. using Org.BouncyCastle.Asn1.GM;
  4. using System;
  5. using System.Text;
  6. using System.Windows.Forms;
  7. using Org.BouncyCastle.Asn1.X9;
  8. using Org.BouncyCastle.Utilities.Encoders;
  9. using Org.BouncyCastle.Math;
  10. using Org.BouncyCastle.Crypto.Generators;
  11. using Org.BouncyCastle.Security;
  12. using System.Linq;
  13.  
  14. namespace SM2VerifySignTool
  15. {
  16.     public partial class Form1 : Form
  17.     {
  18.         public Form1()
  19.         {
  20.             InitializeComponent();
  21.         }
  22.  
  23.         int toDigit(char ch, int index)
  24.         {
  25.             int digit = Convert.ToInt32(ch.ToString(), 16);
  26.             if (digit == -1)
  27.             {
  28.                 throw new SystemException("Illegal hexadecimal character " + ch + " at index " + index);
  29.             }
  30.             return digit;
  31.         }
  32.  
  33.         string HexToBase64(string hexString)
  34.         {
  35.             byte[] bytes = Enumerable.Range(0, hexString.Length)
  36.                                      .Where(x => x % 2 == 0)
  37.                                      .Select(x => Convert.ToByte(hexString.Substring(x, 2), 16))
  38.                                      .ToArray();
  39.             return Convert.ToBase64String(bytes);
  40.         }
  41.  
  42.         byte[] hexStrToByte(String hexStr)
  43.         {
  44.             if ((null == hexStr) || (hexStr.Length == 0))
  45.             {
  46.                 return null;
  47.             }
  48.             char[] hexData = hexStr.ToCharArray();
  49.             int len = hexData.Length;
  50.             if ((len & 0x1) != 0)
  51.             {
  52.                 throw new SystemException("Odd number of characters.");
  53.             }
  54.             byte[] out1 = new byte[len >> 1];
  56.             int i = 0;
  57.             for (int j = 0; j < len; i++)
  58.             {
  59.                 int f = toDigit(hexData[j], j) << 4;
  60.                 j++;
  61.                 f |= toDigit(hexData[j], j);
  62.                 j++;
  63.                 out1[i] = ((byte)(f & 0xFF));
  64.             }
  65.             return out1;
  66.         }
  67.  
  68.         X9ECParameters x9ec = GMNamedCurves.GetByName("SM2P256V1");
  69.  
  70.  
  71.         /**
  72.         *生成
  73.         */
  74.         void GenerateKey(out string pubkeyStr, out string prikeyStr)
  75.         {
  76.             var g = new ECKeyPairGenerator();
  77.             g.Init(new ECKeyGenerationParameters(new ECDomainParameters(x9ec), new SecureRandom()));
  78.             var k = g.GenerateKeyPair();
  79.             byte[] pubkey = ((ECPublicKeyParameters)k.Public).Q.GetEncoded(false);
  80.             byte[] privkey = ((ECPrivateKeyParameters)k.Private).D.ToByteArray();
  81.             prikeyStr = BitConverter.ToString(privkey).Replace("-", "");
  82.             pubkeyStr = BitConverter.ToString(pubkey).Replace("-", "");
  83.         }
  84.  
  85.         /**
  86.         *加签
  87.         */
  88.         string Sign(string prikeyStr, string data)
  89.         {
  90.             byte[] msg = Encoding.UTF8.GetBytes(data);
  91.             byte[] priKey = hexStrToByte(prikeyStr);
  92.             SM2Signer sm2Signer = new SM2Signer();
  93.             ECPrivateKeyParameters privateKeyParameters = new ECPrivateKeyParameters(new BigInteger(1, priKey), new ECDomainParameters(x9ec));
  94.  
  95.             sm2Signer.Init(true, privateKeyParameters);
  96.             sm2Signer.BlockUpdate(msg, 0, msg.Length);
  97.             return Hex.ToHexString(sm2Signer.GenerateSignature());
  98.         }
  99.  
  100.  
  101.         /*
  102.         * 验签
  103.         */
  104.         bool verifySign(string pubkeyStr, string data, string sign)
  105.         {
  106.             byte[] signHex = hexStrToByte(sign);
  107.             byte[] pubkey = hexStrToByte(pubkeyStr);
  108.             byte[] msgByte = Encoding.UTF8.GetBytes(data);
  109.             SM2Signer sm2Signer = new SM2Signer();
  110.             ECPublicKeyParameters publicKeyParameters = new ECPublicKeyParameters(x9ec.Curve.DecodePoint(pubkey), new ECDomainParameters(x9ec));
  111.             sm2Signer.Init(false, publicKeyParameters);
  112.             sm2Signer.BlockUpdate(msgByte, 0, msgByte.Length);
  113.             return sm2Signer.VerifySignature(signHex);
  114.         }
  115.  
  116.         private void btnVerify_Click(object sender, EventArgs e)
  117.         {
  118.             txtResult.Text = "";
  119.             try
  120.             {
  121.                 string pubk = txtPubkey.Text;
  122.                 string data = txtData.Text;
  123.                 string sign = txtSign.Text;
  124.                 bool b = verifySign(pubk, data, sign);
  125.                 if (b)
  126.                 {
  127.                     txtResult.Text = "验证成功";
  128.                 }
  129.                 else
  130.                 {
  131.                     txtResult.Text = "验证失败";
  132.                 }
  133.             }
  134.             catch (Exception ex)
  135.             {
  136.                 txtResult.Text = "验证异常:" + ex.Message;
  137.             }
  138.         }
  139.  
  140.         /// <summary>
  141.         /// Base64字符串转Hex字符串↓
  142.         /// </summary>
  143.         /// <param name="sender"></param>
  144.         /// <param name="e"></param>
  145.         private void button1_Click(object sender, EventArgs e)
  146.         {
  147.             try
  148.             {
  149.                 byte[] bytes = Convert.FromBase64String(txtBase64.Text); // 将base64字符串转换为byte数组
  150.                 string hexString = BitConverter.ToString(bytes).Replace("-", ""); // 将byte数组转换为Hex字符串
  151.                 txtHex.Text = hexString;
  152.             }
  153.             catch (Exception ex)
  154.             {
  155.                 txtHex.Text = "转换异常:" + ex.Message;
  156.             }
  157.         }
  158.  
  159.         private void Form1_Load(object sender, EventArgs e)
  160.         {
  161.             //string pubkeyStr = "";
  162.             //string prikeyStr = "";
  163.             //GenerateKey(out pubkeyStr, out prikeyStr);
  164.             //txtPriKey.Text = prikeyStr;
  165.             //txtPubkey.Text = pubkeyStr;
  166.         }
  167.  
  168.         private void button2_Click(object sender, EventArgs e)
  169.         {
  170.             try
  171.             {
  172.                 string prik = txtPriKey.Text;
  173.                 string data = txtData.Text;
  174.                 txtSign.Text = Sign(prik, data);
  175.             }
  176.             catch (Exception ex)
  177.             {
  178.                 txtSign.Text = "加签识别:" + ex.Message;
  179.             }
  180.         }
  181.  
  182.         private void button3_Click(object sender, EventArgs e)
  183.         {
  184.             string pubkeyStr = "";
  185.             string prikeyStr = "";
  186.             GenerateKey(out pubkeyStr, out prikeyStr);
  187.             txtPriKey.Text = prikeyStr;
  188.             txtPubkey.Text = pubkeyStr;
  189.         }
  190.  
  191.         private void button4_Click(object sender, EventArgs e)
  192.         {
  193.             try
  194.             {
  195.                 string hexString = txtHex.Text;
  196.                 string base64String = HexToBase64(hexString);
  197.                 txtBase64.Text = base64String;
  198.             }
  199.             catch (Exception ex)
  200.             {
  201.                 txtBase64.Text = "转换异常:" + ex.Message;
  202.             }
  203.         }
  204.  
  205.         private void button5_Click(object sender, EventArgs e)
  206.         {
  207.             try
  208.             {
  209.                 string originalString = txtStr.Text;
  210.                 byte[] bytes = System.Text.Encoding.UTF8.GetBytes(originalString);
  211.                 string base64String = Convert.ToBase64String(bytes);
  212.                 txtBase64.Text = base64String;
  213.             }
  214.             catch (Exception ex)
  215.             {
  216.                 txtBase64.Text = "编码异常:" + ex.Message;
  217.             }
  218.         }
  219.  
  220.         private void button6_Click(object sender, EventArgs e)
  221.         {
  222.             try
  223.             {
  224.                 string base64String = txtBase64.Text;
  225.                 byte[] bytes = Convert.FromBase64String(base64String);
  226.                 string decodedString = Encoding.UTF8.GetString(bytes);
  227.                 txtStr.Text = decodedString;
  228.             }
  229.             catch (Exception ex)
  230.             {
  231.                 txtStr.Text = "解码异常:" + ex.Message;
  232.             }
  233.         }
  234.     }
  235. }

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