C#.NET 国密SM2 签名验签 与JAVA互通 ver:20230807

.NET 环境：.NET6 控制台程序(.net core)。

JAVA 环境：JAVA8（JDK8,JAVA 1.8），带maven 的JAVA控制台程序。

1.最好要到对方源码(DEMO+JAR包也可以)，可以用IDEA反编译（Ctrl+鼠标左键），看它过程逻辑和结果格式。

2.常说的SM2签名，指的就是“SM3withSM2”。类似于：SHA256withRSA，SHA1withRSA。

3.签名结果：有2种格式：r||s 和 asn1 ，双方得约定好。
SignSm3WithSm2 是RS，SignSm3WithSm2Asn1Rs 是 asn1，一种不行就换另一种调试。

4.签名结果传输，可以转BASE64字符串或16进制字符串，双方得约定好。

5.如果未指明 userId： 那默认值就是：1234567812345678。
string userId = "1234567812345678";

6.有的文档说是进行 sm3 hash 后进行 sm2 签名，我们以为是：
var rstA=sm3hash(dataString);
var rstB= SignSm3WithSm2(rstA);
但实际只有一步：
var rstB= SignSm3WithSm2(dataString);
文档描述和代码逻辑有出入的地方很多，所以得找对方要代码DEMO，Show me the code !

7.有的签名代码和BC库是不兼容的，得少量手动实现：https://www.cnblogs.com/runliuv/p/16486898.html。

注意：JAVA的 HUTOOL - sm2.sign 结果格式是 RS 的，我们得用 VerifySm3WithSm2Asn1Rs。

生成一组国密公私钥：

私钥：FAB8BBE670FAE338C9E9382B9FB6485225C11A3ECB84C938F10F20A93B6215F0

公钥：049EF573019D9A03B16B0BE44FC8A5B4E8E098F56034C97B312282DD0B4810AFC3CC759673ED0FC9B9DC7E6FA38F0E2B121E02654BF37EA6B63FAF2A0D6013EADF

.NET 代码：

GmUtil 工具类，需要nuget下载 Portable.BouncyCastle 1.9.0 版本：

  1. using Org.BouncyCastle.Asn1;
  2. using Org.BouncyCastle.Asn1.GM;
  3. using Org.BouncyCastle.Asn1.X9;
  4. using Org.BouncyCastle.Crypto;
  5. using Org.BouncyCastle.Crypto.Digests;
  6. using Org.BouncyCastle.Crypto.Engines;
  7. using Org.BouncyCastle.Crypto.Generators;
  8. using Org.BouncyCastle.Crypto.Parameters;
  9. using Org.BouncyCastle.Math;
  10. using Org.BouncyCastle.Security;
  11. using Org.BouncyCastle.Utilities;
  12. using Org.BouncyCastle.Utilities.Encoders;
  13. using Org.BouncyCastle.X509;
  14. using System;
  15. using System.Collections.Generic;
  16. using System.IO;
  17.  
  18. namespace CommonUtils
  19. {
  20.     /**
  21.      * need lib:
  22.      * BouncyCastle.Crypto.dll（http://www.bouncycastle.org/csharp/index.html） 
  23.  
  24.      * 用BC的注意点：
  25.      * 这个版本的BC对SM3withSM2的结果为asn1格式的r和s，如果需要直接拼接的r||s需要自己转换。下面rsAsn1ToPlainByteArray、rsPlainByteArrayToAsn1就在干这事。
  26.      * 这个版本的BC对SM2的结果为C1||C2||C3，据说为旧标准，新标准为C1||C3||C2，用新标准的需要自己转换。下面（被注释掉的）changeC1C2C3ToC1C3C2、changeC1C3C2ToC1C2C3就在干这事。java版的高版本有加上C1C3C2，csharp版没准以后也会加，但目前还没有，java版的目前可以初始化时“ SM2Engine sm2Engine = new SM2Engine(SM2Engine.Mode.C1C3C2);”。
  27.      *
  28.      * 按要求国密算法仅允许使用加密机，本demo国密算法仅供学习使用，请不要用于生产用途。
  29.      */
  30.     public class GmUtil
  31.     {
  32.  
  33.         //private static readonly ILog log = LogManager.GetLogger(typeof(GmUtil));
  34.  
  35.         private static X9ECParameters x9ECParameters = GMNamedCurves.GetByName("sm2p256v1");
  36.         private static ECDomainParameters ecDomainParameters = new ECDomainParameters(x9ECParameters.Curve, x9ECParameters.G, x9ECParameters.N);
  37.  
  38.         /**
  39.          *
  40.          * @param msg
  41.          * @param userId
  42.          * @param privateKey
  43.          * @return r||s，直接拼接byte数组的rs
  44.          */
  45.         public static byte[] SignSm3WithSm2(byte[] msg, byte[] userId, AsymmetricKeyParameter privateKey)
  46.         {
  47.             return RsAsn1ToPlainByteArray(SignSm3WithSm2Asn1Rs(msg, userId, privateKey));
  48.         }
  49.  
  50.         /**
  51.           * @param msg
  52.           * @param userId
  53.           * @param privateKey
  54.           * @return rs in <b>asn1 format</b>
  55.           */
  56.         public static byte[] SignSm3WithSm2Asn1Rs(byte[] msg, byte[] userId, AsymmetricKeyParameter privateKey)
  57.         {
  58.             try
  59.             {
  60.                 ISigner signer = SignerUtilities.GetSigner("SM3withSM2");
  61.                 signer.Init(true, new ParametersWithID(privateKey, userId));
  62.                 signer.BlockUpdate(msg, 0, msg.Length);
  63.                 byte[] sig = signer.GenerateSignature();
  64.                 return sig;
  65.             }
  66.             catch (Exception e)
  67.             {
  68.                 //log.Error("SignSm3WithSm2Asn1Rs error: " + e.Message, e);
  69.                 return null;
  70.             }
  71.         }
  72.  
  73.         /**
  74.         *
  75.         * @param msg
  76.         * @param userId
  77.         * @param rs r||s，直接拼接byte数组的rs
  78.         * @param publicKey
  79.         * @return
  80.         */
  81.         public static bool VerifySm3WithSm2(byte[] msg, byte[] userId, byte[] rs, AsymmetricKeyParameter publicKey)
  82.         {
  83.             if (rs == null || msg == null || userId == null) return false;
  84.             if (rs.Length != RS_LEN * 2) return false;
  85.             return VerifySm3WithSm2Asn1Rs(msg, userId, RsPlainByteArrayToAsn1(rs), publicKey);
  86.         }
  87.  
  88.         /**
  89.          *
  90.          * @param msg
  91.          * @param userId
  92.          * @param rs in <b>asn1 format</b>
  93.          * @param publicKey
  94.          * @return
  95.          */
  96.  
  97.         public static bool VerifySm3WithSm2Asn1Rs(byte[] msg, byte[] userId, byte[] sign, AsymmetricKeyParameter publicKey)
  98.         {
  99.             try
  100.             {
  101.                 ISigner signer = SignerUtilities.GetSigner("SM3withSM2");
  102.                 signer.Init(false, new ParametersWithID(publicKey, userId));
  103.                 signer.BlockUpdate(msg, 0, msg.Length);
  104.                 return signer.VerifySignature(sign);
  105.             }
  106.             catch (Exception e)
  107.             {
  108.                 //log.Error("VerifySm3WithSm2Asn1Rs error: " + e.Message, e);
  109.                 return false;
  110.             }
  111.         }
  112.  
  113.         /**
  114.          * bc加解密使用旧标c1||c2||c3，此方法在加密后调用，将结果转化为c1||c3||c2
  115.          * @param c1c2c3
  116.          * @return
  117.          */
  118.         private static byte[] ChangeC1C2C3ToC1C3C2(byte[] c1c2c3)
  119.         {
  120.             int c1Len = (x9ECParameters.Curve.FieldSize + 7) / 8 * 2 + 1; //sm2p256v1的这个固定65。可看GMNamedCurves、ECCurve代码。
  121.             const int c3Len = 32; //new SM3Digest().getDigestSize();
  122.             byte[] result = new byte[c1c2c3.Length];
  123.             Buffer.BlockCopy(c1c2c3, 0, result, 0, c1Len); //c1
  124.             Buffer.BlockCopy(c1c2c3, c1c2c3.Length - c3Len, result, c1Len, c3Len); //c3
  125.             Buffer.BlockCopy(c1c2c3, c1Len, result, c1Len + c3Len, c1c2c3.Length - c1Len - c3Len); //c2
  126.             return result;
  127.         }
  128.  
  129.         /**
  130.          * bc加解密使用旧标c1||c3||c2，此方法在解密前调用，将密文转化为c1||c2||c3再去解密
  131.          * @param c1c3c2
  132.          * @return
  133.          */
  134.         private static byte[] ChangeC1C3C2ToC1C2C3(byte[] c1c3c2)
  135.         {
  136.             int c1Len = (x9ECParameters.Curve.FieldSize + 7) / 8 * 2 + 1; //sm2p256v1的这个固定65。可看GMNamedCurves、ECCurve代码。
  137.             const int c3Len = 32; //new SM3Digest().GetDigestSize();
  138.             byte[] result = new byte[c1c3c2.Length];
  139.             Buffer.BlockCopy(c1c3c2, 0, result, 0, c1Len); //c1: 0->65
  140.             Buffer.BlockCopy(c1c3c2, c1Len + c3Len, result, c1Len, c1c3c2.Length - c1Len - c3Len); //c2
  141.             Buffer.BlockCopy(c1c3c2, c1Len, result, c1c3c2.Length - c3Len, c3Len); //c3
  142.             return result;
  143.         }
  144.  
  145.         /**
  146.          * c1||c3||c2
  147.          * @param data
  148.          * @param key
  149.          * @return
  150.          */
  151.         public static byte[] Sm2Decrypt(byte[] data, AsymmetricKeyParameter key)
  152.         {
  153.             return Sm2DecryptOld(ChangeC1C3C2ToC1C2C3(data), key);
  154.         }
  155.  
  156.         /**
  157.          * c1||c3||c2
  158.          * @param data
  159.          * @param key
  160.          * @return
  161.          */
  162.  
  163.         public static byte[] Sm2Encrypt(byte[] data, AsymmetricKeyParameter key)
  164.         {
  165.             return ChangeC1C2C3ToC1C3C2(Sm2EncryptOld(data, key));
  166.         }
  167.  
  168.         /**
  169.          * c1||c2||c3
  170.          * @param data
  171.          * @param key
  172.          * @return
  173.          */
  174.         public static byte[] Sm2EncryptOld(byte[] data, AsymmetricKeyParameter pubkey)
  175.         {
  176.             try
  177.             {
  178.                 SM2Engine sm2Engine = new SM2Engine();
  179.                 sm2Engine.Init(true, new ParametersWithRandom(pubkey, new SecureRandom()));
  180.                 return sm2Engine.ProcessBlock(data, 0, data.Length);
  181.             }
  182.             catch (Exception e)
  183.             {
  184.                 //log.Error("Sm2EncryptOld error: " + e.Message, e);
  185.                 return null;
  186.             }
  187.         }
  188.  
  189.         /**
  190.          * c1||c2||c3
  191.          * @param data
  192.          * @param key
  193.          * @return
  194.          */
  195.         public static byte[] Sm2DecryptOld(byte[] data, AsymmetricKeyParameter key)
  196.         {
  197.             try
  198.             {
  199.                 SM2Engine sm2Engine = new SM2Engine();
  200.                 sm2Engine.Init(false, key);
  201.                 return sm2Engine.ProcessBlock(data, 0, data.Length);
  202.             }
  203.             catch (Exception e)
  204.             {
  205.                 //log.Error("Sm2DecryptOld error: " + e.Message, e);
  206.                 return null;
  207.             }
  208.         }
  209.  
  210.         /**
  211.          * @param bytes
  212.          * @return
  213.          */
  214.         public static byte[] Sm3(byte[] bytes)
  215.         {
  216.             try
  217.             {
  218.                 SM3Digest digest = new SM3Digest();
  219.                 digest.BlockUpdate(bytes, 0, bytes.Length);
  220.                 byte[] result = DigestUtilities.DoFinal(digest);
  221.                 return result;
  222.             }
  223.             catch (Exception e)
  224.             {
  225.                 //log.Error("Sm3 error: " + e.Message, e);
  226.                 return null;
  227.             }
  228.         }
  229.  
  230.         private const int RS_LEN = 32;
  231.  
  232.         private static byte[] BigIntToFixexLengthBytes(BigInteger rOrS)
  233.         {
  234.             // for sm2p256v1, n is 00fffffffeffffffffffffffffffffffff7203df6b21c6052b53bbf40939d54123,
  235.             // r and s are the result of mod n, so they should be less than n and have length<=32
  236.             byte[] rs = rOrS.ToByteArray();
  237.             if (rs.Length == RS_LEN) return rs;
  238.             else if (rs.Length == RS_LEN + 1 && rs[0] == 0) return Arrays.CopyOfRange(rs, 1, RS_LEN + 1);
  239.             else if (rs.Length < RS_LEN)
  240.             {
  241.                 byte[] result = new byte[RS_LEN];
  242.                 Arrays.Fill(result, (byte)0);
  243.                 Buffer.BlockCopy(rs, 0, result, RS_LEN - rs.Length, rs.Length);
  244.                 return result;
  245.             }
  246.             else
  247.             {
  248.                 throw new ArgumentException("err rs: " + Hex.ToHexString(rs));
  249.             }
  250.         }
  251.  
  252.         /**
  253.          * BC的SM3withSM2签名得到的结果的rs是asn1格式的，这个方法转化成直接拼接r||s
  254.          * @param rsDer rs in asn1 format
  255.          * @return sign result in plain byte array
  256.          */
  257.         private static byte[] RsAsn1ToPlainByteArray(byte[] rsDer)
  258.         {
  259.             Asn1Sequence seq = Asn1Sequence.GetInstance(rsDer);
  260.             byte[] r = BigIntToFixexLengthBytes(DerInteger.GetInstance(seq[0]).Value);
  261.             byte[] s = BigIntToFixexLengthBytes(DerInteger.GetInstance(seq[1]).Value);
  262.             byte[] result = new byte[RS_LEN * 2];
  263.             Buffer.BlockCopy(r, 0, result, 0, r.Length);
  264.             Buffer.BlockCopy(s, 0, result, RS_LEN, s.Length);
  265.             return result;
  266.         }
  267.  
  268.         /**
  269.          * BC的SM3withSM2验签需要的rs是asn1格式的，这个方法将直接拼接r||s的字节数组转化成asn1格式
  270.          * @param sign in plain byte array
  271.          * @return rs result in asn1 format
  272.          */
  273.         private static byte[] RsPlainByteArrayToAsn1(byte[] sign)
  274.         {
  275.             if (sign.Length != RS_LEN * 2) throw new ArgumentException("err rs. ");
  276.             BigInteger r = new BigInteger(1, Arrays.CopyOfRange(sign, 0, RS_LEN));
  277.             BigInteger s = new BigInteger(1, Arrays.CopyOfRange(sign, RS_LEN, RS_LEN * 2));
  278.             Asn1EncodableVector v = new Asn1EncodableVector();
  279.             v.Add(new DerInteger(r));
  280.             v.Add(new DerInteger(s));
  281.             try
  282.             {
  283.                 return new DerSequence(v).GetEncoded("DER");
  284.             }
  285.             catch (IOException e)
  286.             {
  287.                 //log.Error("RsPlainByteArrayToAsn1 error: " + e.Message, e);
  288.                 return null;
  289.             }
  290.         }
  291.  
  292.         public static AsymmetricCipherKeyPair GenerateKeyPair()
  293.         {
  294.             try
  295.             {
  296.                 ECKeyPairGenerator kpGen = new ECKeyPairGenerator();
  297.                 kpGen.Init(new ECKeyGenerationParameters(ecDomainParameters, new SecureRandom()));
  298.                 return kpGen.GenerateKeyPair();
  299.             }
  300.             catch (Exception e)
  301.             {
  302.                 //log.Error("generateKeyPair error: " + e.Message, e);
  303.                 return null;
  304.             }
  305.         }
  306.  
  307.         public static ECPrivateKeyParameters GetPrivatekeyFromD(BigInteger d)
  308.         {
  309.             return new ECPrivateKeyParameters(d, ecDomainParameters);
  310.         }
  311.  
  312.         public static ECPublicKeyParameters GetPublickeyFromXY(BigInteger x, BigInteger y)
  313.         {
  314.             return new ECPublicKeyParameters(x9ECParameters.Curve.CreatePoint(x, y), ecDomainParameters);
  315.         }
  316.  
  317.         public static AsymmetricKeyParameter GetPublickeyFromX509File(FileInfo file)
  318.         {
  319.  
  320.             FileStream fileStream = null;
  321.             try
  322.             {
  323.                 //file.DirectoryName + "\\" + file.Name
  324.                 fileStream = new FileStream(file.FullName, FileMode.Open, FileAccess.Read);
  325.                 X509Certificate certificate = new X509CertificateParser().ReadCertificate(fileStream);
  326.                 return certificate.GetPublicKey();
  327.             }
  328.             catch (Exception e)
  329.             {
  330.                 //log.Error(file.Name + "读取失败，异常：" + e);
  331.             }
  332.             finally
  333.             {
  334.                 if (fileStream != null)
  335.                     fileStream.Close();
  336.             }
  337.             return null;
  338.         }
  339.  
  340.         public class Sm2Cert
  341.         {
  342.             public AsymmetricKeyParameter privateKey;
  343.             public AsymmetricKeyParameter publicKey;
  344.             public String certId;
  345.         }
  346.  
  347.         private static byte[] ToByteArray(int i)
  348.         {
  349.             byte[] byteArray = new byte[4];
  350.             byteArray[0] = (byte)(i >> 24);
  351.             byteArray[1] = (byte)((i & 0xFFFFFF) >> 16);
  352.             byteArray[2] = (byte)((i & 0xFFFF) >> 8);
  353.             byteArray[3] = (byte)(i & 0xFF);
  354.             return byteArray;
  355.         }
  356.  
  357.         /**
  358.          * 字节数组拼接
  359.          *
  360.          * @param params
  361.          * @return
  362.          */
  363.         private static byte[] Join(params byte[][] byteArrays)
  364.         {
  365.             List<byte> byteSource = new List<byte>();
  366.             for (int i = 0; i < byteArrays.Length; i++)
  367.             {
  368.                 byteSource.AddRange(byteArrays[i]);
  369.             }
  370.             byte[] data = byteSource.ToArray();
  371.             return data;
  372.         }
  373.  
  374.         /**
  375.          * 密钥派生函数
  376.          *
  377.          * @param Z
  378.          * @param klen
  379.          *            生成klen字节数长度的密钥
  380.          * @return
  381.          */
  382.         private static byte[] KDF(byte[] Z, int klen)
  383.         {
  384.             int ct = 1;
  385.             int end = (int)Math.Ceiling(klen * 1.0 / 32);
  386.             List<byte> byteSource = new List<byte>();
  387.             try
  388.             {
  389.                 for (int i = 1; i < end; i++)
  390.                 {
  391.                     byteSource.AddRange(GmUtil.Sm3(Join(Z, ToByteArray(ct))));
  392.                     ct++;
  393.                 }
  394.                 byte[] last = GmUtil.Sm3(Join(Z, ToByteArray(ct)));
  395.                 if (klen % 32 == 0)
  396.                 {
  397.                     byteSource.AddRange(last);
  398.                 }
  399.                 else
  400.                     byteSource.AddRange(Arrays.CopyOfRange(last, 0, klen % 32));
  401.                 return byteSource.ToArray();
  402.             }
  403.             catch (Exception e)
  404.             {
  405.                 //log.Error("KDF error: " + e.Message, e);
  406.             }
  407.             return null;
  408.         }
  409.  
  410.         public static byte[] Sm4DecryptCBC(byte[] keyBytes, byte[] cipher, byte[] iv, String algo)
  411.         {
  412.             if (keyBytes.Length != 16) throw new ArgumentException("err key length");
  413.             if (cipher.Length % 16 != 0 && algo.Contains("NoPadding")) throw new ArgumentException("err data length");
  414.  
  415.             try
  416.             {
  417.                 KeyParameter key = ParameterUtilities.CreateKeyParameter("SM4", keyBytes);
  418.                 IBufferedCipher c = CipherUtilities.GetCipher(algo);
  419.                 if (iv == null) iv = ZeroIv(algo);
  420.                 c.Init(false, new ParametersWithIV(key, iv));
  421.                 return c.DoFinal(cipher);
  422.             }
  423.             catch (Exception e)
  424.             {
  425.                 //log.Error("Sm4DecryptCBC error: " + e.Message, e);
  426.                 return null;
  427.             }
  428.         }
  429.  
  430.         public static byte[] Sm4EncryptCBC(byte[] keyBytes, byte[] plain, byte[] iv, String algo)
  431.         {
  432.             if (keyBytes.Length != 16) throw new ArgumentException("err key length");
  433.             if (plain.Length % 16 != 0 && algo.Contains("NoPadding")) throw new ArgumentException("err data length");
  434.  
  435.             try
  436.             {
  437.                 KeyParameter key = ParameterUtilities.CreateKeyParameter("SM4", keyBytes);
  438.                 IBufferedCipher c = CipherUtilities.GetCipher(algo);
  439.                 if (iv == null) iv = ZeroIv(algo);
  440.                 c.Init(true, new ParametersWithIV(key, iv));
  441.                 return c.DoFinal(plain);
  442.             }
  443.             catch (Exception e)
  444.             {
  445.                 //log.Error("Sm4EncryptCBC error: " + e.Message, e);
  446.                 return null;
  447.             }
  448.         }
  449.  
  450.         public static byte[] Sm4EncryptECB(byte[] keyBytes, byte[] plain, string algo)
  451.         {
  452.             if (keyBytes.Length != 16) throw new ArgumentException("err key length");
  453.             //NoPadding 的情况下需要校验数据长度是16的倍数.
  454.             if (plain.Length % 16 != 0 && algo.Contains("NoPadding")) throw new ArgumentException("err data length");
  455.  
  456.             try
  457.             {
  458.                 KeyParameter key = ParameterUtilities.CreateKeyParameter("SM4", keyBytes);
  459.                 IBufferedCipher c = CipherUtilities.GetCipher(algo);
  460.                 c.Init(true, key);
  461.                 return c.DoFinal(plain);
  462.             }
  463.             catch (Exception e)
  464.             {
  465.                 //log.Error("Sm4EncryptECB error: " + e.Message, e);
  466.                 return null;
  467.             }
  468.         }
  469.  
  470.         public static byte[] Sm4DecryptECB(byte[] keyBytes, byte[] cipher, string algo)
  471.         {
  472.             if (keyBytes.Length != 16) throw new ArgumentException("err key length");
  473.             if (cipher.Length % 16 != 0 && algo.Contains("NoPadding")) throw new ArgumentException("err data length");
  474.  
  475.             try
  476.             {
  477.                 KeyParameter key = ParameterUtilities.CreateKeyParameter("SM4", keyBytes);
  478.                 IBufferedCipher c = CipherUtilities.GetCipher(algo);
  479.                 c.Init(false, key);
  480.                 return c.DoFinal(cipher);
  481.             }
  482.             catch (Exception e)
  483.             {
  484.                 //log.Error("Sm4DecryptECB error: " + e.Message, e);
  485.                 return null;
  486.             }
  487.         }
  488.  
  489.         public const String SM4_ECB_NOPADDING = "SM4/ECB/NoPadding";
  490.         public const String SM4_CBC_NOPADDING = "SM4/CBC/NoPadding";
  491.         public const String SM4_CBC_PKCS7PADDING = "SM4/CBC/PKCS7Padding";
  492.  
  493.         /**
  494.          * cfca官网CSP沙箱导出的sm2文件
  495.          * @param pem 二进制原文
  496.          * @param pwd 密码
  497.          * @return
  498.          */
  499.         public static Sm2Cert readSm2File(byte[] pem, String pwd)
  500.         {
  501.  
  502.             Sm2Cert sm2Cert = new Sm2Cert();
  503.             try
  504.             {
  505.                 Asn1Sequence asn1Sequence = (Asn1Sequence)Asn1Object.FromByteArray(pem);
  506.                 //            ASN1Integer asn1Integer = (ASN1Integer) asn1Sequence.getObjectAt(0); //version=1
  507.                 Asn1Sequence priSeq = (Asn1Sequence)asn1Sequence[1];//private key
  508.                 Asn1Sequence pubSeq = (Asn1Sequence)asn1Sequence[2];//public key and x509 cert
  509.  
  510.                 //            ASN1ObjectIdentifier sm2DataOid = (ASN1ObjectIdentifier) priSeq.getObjectAt(0);
  511.                 //            ASN1ObjectIdentifier sm4AlgOid = (ASN1ObjectIdentifier) priSeq.getObjectAt(1);
  512.                 Asn1OctetString priKeyAsn1 = (Asn1OctetString)priSeq[2];
  513.                 byte[] key = KDF(System.Text.Encoding.UTF8.GetBytes(pwd), 32);
  514.                 byte[] priKeyD = Sm4DecryptCBC(Arrays.CopyOfRange(key, 16, 32),
  515.                         priKeyAsn1.GetOctets(),
  516.                         Arrays.CopyOfRange(key, 0, 16), SM4_CBC_PKCS7PADDING);
  517.                 sm2Cert.privateKey = GetPrivatekeyFromD(new BigInteger(1, priKeyD));
  518.                 //            log.Info(Hex.toHexString(priKeyD));
  519.  
  520.                 //            ASN1ObjectIdentifier sm2DataOidPub = (ASN1ObjectIdentifier) pubSeq.getObjectAt(0);
  521.                 Asn1OctetString pubKeyX509 = (Asn1OctetString)pubSeq[1];
  522.                 X509Certificate x509 = (X509Certificate)new X509CertificateParser().ReadCertificate(pubKeyX509.GetOctets());
  523.                 sm2Cert.publicKey = x509.GetPublicKey();
  524.                 sm2Cert.certId = x509.SerialNumber.ToString(10); //这里转10进账，有啥其他进制要求的自己改改
  525.                 return sm2Cert;
  526.             }
  527.             catch (Exception e)
  528.             {
  529.                 //log.Error("readSm2File error: " + e.Message, e);
  530.                 return null;
  531.             }
  532.         }
  533.  
  534.         /**
  535.          *
  536.          * @param cert
  537.          * @return
  538.          */
  539.         public static Sm2Cert ReadSm2X509Cert(byte[] cert)
  540.         {
  541.             Sm2Cert sm2Cert = new Sm2Cert();
  542.             try
  543.             {
  544.  
  545.                 X509Certificate x509 = new X509CertificateParser().ReadCertificate(cert);
  546.                 sm2Cert.publicKey = x509.GetPublicKey();
  547.                 sm2Cert.certId = x509.SerialNumber.ToString(10); //这里转10进账，有啥其他进制要求的自己改改
  548.                 return sm2Cert;
  549.             }
  550.             catch (Exception e)
  551.             {
  552.                 //log.Error("ReadSm2X509Cert error: " + e.Message, e);
  553.                 return null;
  554.             }
  555.         }
  556.  
  557.         public static byte[] ZeroIv(String algo)
  558.         {
  559.  
  560.             try
  561.             {
  562.                 IBufferedCipher cipher = CipherUtilities.GetCipher(algo);
  563.                 int blockSize = cipher.GetBlockSize();
  564.                 byte[] iv = new byte[blockSize];
  565.                 Arrays.Fill(iv, (byte)0);
  566.                 return iv;
  567.             }
  568.             catch (Exception e)
  569.             {
  570.                 //log.Error("ZeroIv error: " + e.Message, e);
  571.                 return null;
  572.             }
  573.         }
  574.  
  575.         public static void Main2(string[] s)
  576.         {
  577.  
  578.             // 随便看看
  579.             //log.Info("GMNamedCurves: ");
  580.             foreach (string e in GMNamedCurves.Names)
  581.             {
  582.                 //log.Info(e);
  583.             }
  584.             //log.Info("sm2p256v1 n:" + x9ECParameters.N);
  585.             //log.Info("sm2p256v1 nHex:" + Hex.ToHexString(x9ECParameters.N.ToByteArray()));
  586.  
  587.             // 生成公私钥对 ---------------------
  588.             AsymmetricCipherKeyPair kp = GmUtil.GenerateKeyPair();
  589.             //log.Info("private key d: " + ((ECPrivateKeyParameters)kp.Private).D);
  590.             //log.Info("public key q:" + ((ECPublicKeyParameters)kp.Public).Q); //{x, y, zs...}
  591.  
  592.             //签名验签
  593.             byte[] msg = System.Text.Encoding.UTF8.GetBytes("message digest");
  594.             byte[] userId = System.Text.Encoding.UTF8.GetBytes("userId");
  595.             byte[] sig = SignSm3WithSm2(msg, userId, kp.Private);
  596.             //log.Info("testSignSm3WithSm2: " + Hex.ToHexString(sig));
  597.             //log.Info("testVerifySm3WithSm2: " + VerifySm3WithSm2(msg, userId, sig, kp.Public));
  598.  
  599.             // 由d生成私钥 ---------------------
  600.             BigInteger d = new BigInteger("097b5230ef27c7df0fa768289d13ad4e8a96266f0fcb8de40d5942af4293a54a", 16);
  601.             ECPrivateKeyParameters bcecPrivateKey = GetPrivatekeyFromD(d);
  602.             //log.Info("testGetFromD: " + bcecPrivateKey.D.ToString(16));
  603.  
  604.             //公钥X坐标PublicKeyXHex: 59cf9940ea0809a97b1cbffbb3e9d96d0fe842c1335418280bfc51dd4e08a5d4
  605.             //公钥Y坐标PublicKeyYHex: 9a7f77c578644050e09a9adc4245d1e6eba97554bc8ffd4fe15a78f37f891ff8
  606.             AsymmetricKeyParameter publicKey = GetPublickeyFromX509File(new FileInfo("d:/certs/69629141652.cer"));
  607.             //log.Info(publicKey);
  608.             AsymmetricKeyParameter publicKey1 = GetPublickeyFromXY(new BigInteger("59cf9940ea0809a97b1cbffbb3e9d96d0fe842c1335418280bfc51dd4e08a5d4", 16), new BigInteger("9a7f77c578644050e09a9adc4245d1e6eba97554bc8ffd4fe15a78f37f891ff8", 16));
  609.             //log.Info("testReadFromX509File: " + ((ECPublicKeyParameters)publicKey).Q);
  610.             //log.Info("testGetFromXY: " + ((ECPublicKeyParameters)publicKey1).Q);
  611.             //log.Info("testPubKey: " + publicKey.Equals(publicKey1));
  612.             //log.Info("testPubKey: " + ((ECPublicKeyParameters)publicKey).Q.Equals(((ECPublicKeyParameters)publicKey1).Q));
  613.  
  614.             // sm2 encrypt and decrypt test ---------------------
  615.             AsymmetricCipherKeyPair kp2 = GenerateKeyPair();
  616.             AsymmetricKeyParameter publicKey2 = kp2.Public;
  617.             AsymmetricKeyParameter privateKey2 = kp2.Private;
  618.             byte[] bs = Sm2Encrypt(System.Text.Encoding.UTF8.GetBytes("s"), publicKey2);
  619.             //log.Info("testSm2Enc dec: " + Hex.ToHexString(bs));
  620.             bs = Sm2Decrypt(bs, privateKey2);
  621.             //log.Info("testSm2Enc dec: " + System.Text.Encoding.UTF8.GetString(bs));
  622.  
  623.             // sm4 encrypt and decrypt test ---------------------
  624.             //0123456789abcdeffedcba9876543210 + 0123456789abcdeffedcba9876543210 -> 681edf34d206965e86b3e94f536e4246
  625.             byte[] plain = Hex.Decode("0123456789abcdeffedcba98765432100123456789abcdeffedcba98765432100123456789abcdeffedcba9876543210");
  626.             byte[] key = Hex.Decode("0123456789abcdeffedcba9876543210");
  627.             byte[] cipher = Hex.Decode("595298c7c6fd271f0402f804c33d3f66");
  628.             bs = Sm4EncryptECB(key, plain, GmUtil.SM4_ECB_NOPADDING);
  629.             //log.Info("testSm4EncEcb: " + Hex.ToHexString(bs)); ;
  630.             bs = Sm4DecryptECB(key, bs, GmUtil.SM4_ECB_NOPADDING);
  631.             //log.Info("testSm4DecEcb: " + Hex.ToHexString(bs));
  632.  
  633.             //读.sm2文件
  634.             String sm2 = "MIIDHQIBATBHBgoqgRzPVQYBBAIBBgcqgRzPVQFoBDDW5/I9kZhObxXE9Vh1CzHdZhIhxn+3byBU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\nVfY6";
  635.             bs = Convert.FromBase64String(sm2);
  636.             String pwd = "cfca1234";
  637.             GmUtil.Sm2Cert sm2Cert = GmUtil.readSm2File(bs, pwd);
  638.             //log.Info("testReadSm2File, pubkey: " + ((ECPublicKeyParameters)sm2Cert.publicKey).Q.ToString());
  639.             //log.Info("testReadSm2File, prikey: " + Hex.ToHexString(((ECPrivateKeyParameters)sm2Cert.privateKey).D.ToByteArray()));
  640.             //log.Info("testReadSm2File, certId: " + sm2Cert.certId);
  641.  
  642.             bs = Sm2Encrypt(System.Text.Encoding.UTF8.GetBytes("s"), ((ECPublicKeyParameters)sm2Cert.publicKey));
  643.             //log.Info("testSm2Enc dec: " + Hex.ToHexString(bs));
  644.             bs = Sm2Decrypt(bs, ((ECPrivateKeyParameters)sm2Cert.privateKey));
  645.             //log.Info("testSm2Enc dec: " + System.Text.Encoding.UTF8.GetString(bs));
  646.  
  647.             msg = System.Text.Encoding.UTF8.GetBytes("message digest");
  648.             userId = System.Text.Encoding.UTF8.GetBytes("userId");
  649.             sig = SignSm3WithSm2(msg, userId, ((ECPrivateKeyParameters)sm2Cert.privateKey));
  650.             //log.Info("testSignSm3WithSm2: " + Hex.ToHexString(sig));
  651.             //log.Info("testVerifySm3WithSm2: " + VerifySm3WithSm2(msg, userId, sig, ((ECPublicKeyParameters)sm2Cert.publicKey)));
  652.         }
  653.  
  654.     }
  655. }

.NET使用：

  1. using CommonUtils;
  2. using Org.BouncyCastle.Crypto;
  3. using Org.BouncyCastle.Math;
  4. using Org.BouncyCastle.Utilities.Encoders;
  5. using System.Text;
  6.  
  7. void TestSM2Sign()
  8. {
  9.     string userId = "1234567812345678";
  10.     byte[] byUserId = Encoding.UTF8.GetBytes(userId);
  11.     String privateKeyHex = "FAB8BBE670FAE338C9E9382B9FB6485225C11A3ECB84C938F10F20A93B6215F0";
  12.     string pubKeyHex = "049EF573019D9A03B16B0BE44FC8A5B4E8E098F56034C97B312282DD0B4810AFC3CC759673ED0FC9B9DC7E6FA38F0E2B121E02654BF37EA6B63FAF2A0D6013EADF";
  13.     //如果是130位公钥，.NET 使用的话，把开头的04截取掉。
  14.     if (pubKeyHex.Length == 130)
  15.     {
  16.         pubKeyHex = pubKeyHex.Substring(2, 128);
  17.     }
  18.     //公钥X，前64位
  19.     String x = pubKeyHex.Substring(0, 64);
  20.     //公钥Y，后64位
  21.     String y = pubKeyHex.Substring(64);
  22.     //获取公钥对象
  23.     AsymmetricKeyParameter publicKey1 = GmUtil.GetPublickeyFromXY(new BigInteger(x, 16), new BigInteger(y, 16));
  24.     BigInteger d = new BigInteger(privateKeyHex, 16);
  25.     //获取私钥对象，用ECPrivateKeyParameters 或 AsymmetricKeyParameter 都可以
  26.     //ECPrivateKeyParameters bcecPrivateKey = CommonUtils.GmUtil.GetPrivatekeyFromD(d);
  27.     AsymmetricKeyParameter bcecPrivateKey = CommonUtils.GmUtil.GetPrivatekeyFromD(d);
  28.  
  29.     String content = "1234泰酷拉NET";
  30.     Console.WriteLine("待处理字符串：" + content);
  31.     //SignSm3WithSm2 是RS，SignSm3WithSm2Asn1Rs 是 asn1
  32.     byte[] digestByte = GmUtil.SignSm3WithSm2(Encoding.UTF8.GetBytes(content), byUserId, bcecPrivateKey);
  33.     string strSM2 = Convert.ToBase64String(digestByte);
  34.     Console.WriteLine("SM2加签后：" + strSM2);
  35.  
  36.     //.NET 验签
  37.     byte[] byToProc = Convert.FromBase64String(strSM2);
  38.     //顺序：报文，userId，签名值，公钥。
  39.     bool verifySign = GmUtil.VerifySm3WithSm2(Encoding.UTF8.GetBytes(content), byUserId, byToProc, publicKey1);
  40.  
  41.     Console.WriteLine("SM2 验签：" + verifySign.ToString());
  42.  
  43.     //JAVA 签名 .NET验签
  44.     string javaContent = "1234泰酷拉JJ"; //注意：报文要和JAVA一致
  45.     Console.WriteLine("javaContent：" + javaContent);
  46.     string javaSM2 = "MEUCIF5PXxIlF0NmQaUtfIGLbZm4JuYT4bkYyoFMA/eIqVaUAiEAkRT3GkrtY2YtUSF9Ya0jOLRMcMUuHNLiWPTy591vnco=";
  47.  
  48.     Console.WriteLine("javaSM2签名结果：" + javaSM2);
  49.     byToProc = Convert.FromBase64String(javaSM2);
  50.     //注意：JAVA HUTOOL - sm2.sign 结果格式是 asn1 的，我们得用 VerifySm3WithSm2Asn1Rs。
  51.     verifySign = GmUtil.VerifySm3WithSm2Asn1Rs(Encoding.UTF8.GetBytes(javaContent), byUserId, byToProc, publicKey1);
  52.  
  53.     Console.WriteLine("JAVA SM2 验签：" + verifySign.ToString());
  54. }

java代码：

maven 引用 ：

  1. <dependency>
  2.       <groupId>cn.hutool</groupId>
  3.       <artifactId>hutool-all</artifactId>
  4.       <version>5.8.1</version>
  5.     </dependency>
  6.  
  7.     <dependency>
  8.       <groupId>org.bouncycastle</groupId>
  9.       <artifactId>bcprov-jdk15on</artifactId>
  10.       <version>1.70</version>
  11.     </dependency>

JAVA调用：

  1. package org.example;
  2.  
  3. import cn.hutool.crypto.SmUtil;
  4. import cn.hutool.crypto.asymmetric.KeyType;
  5. import cn.hutool.crypto.asymmetric.SM2;
  6. import org.bouncycastle.crypto.engines.SM2Engine;
  7. import org.bouncycastle.util.encoders.Hex;
  8. import java.util.Base64;
  9.  
  10.     static void testSM2Sign() {
  11.  
  12.         String content = "1234泰酷拉JJ";
  13.         System.out.println("待处理字符串：" + content);
  14.         String userId = "1234567812345678";
  15.         byte[] byUserId = userId.getBytes();
  16.  
  17.         //私钥
  18.         String privateKeyHex = "FAB8BBE670FAE338C9E9382B9FB6485225C11A3ECB84C938F10F20A93B6215F0";
  19.         //公钥X
  20.         String x = "9EF573019D9A03B16B0BE44FC8A5B4E8E098F56034C97B312282DD0B4810AFC3";
  21.         //公钥Y
  22.         String y = "CC759673ED0FC9B9DC7E6FA38F0E2B121E02654BF37EA6B63FAF2A0D6013EADF";
  23.         //构造函数里，私钥或公钥，其中一方可为空 null
  24.         SM2 sm2 = new SM2(privateKeyHex, x, y);
  25.         byte[] byRst = sm2.sign(content.getBytes(), byUserId);
  26.         String sm2Sign = Base64.getEncoder().encodeToString(byRst);
  27.         System.out.println("sm2 BASE64 签名:" + sm2Sign);
  28.  
  29.         byte[] bySign = Base64.getDecoder().decode(sm2Sign);
  30.         boolean verifySign = sm2.verify(content.getBytes(), bySign, byUserId);
  31.  
  32.         System.out.println("SM2 验签：" + verifySign);
  33.     }

end

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