C#.NET 国密SM2 签名验签与JAVA互通 ver:20230807

日立李作鵬 發表於 2023-8-7 11:23:00

C#.NET 国密SM2 签名验签与JAVA互通 ver:20230807

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 Asn1 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：
<div class="cnblogs_code">
<pre>using Org.BouncyCastle.Asn1;
using Org.BouncyCastle.Asn1.GM;
using Org.BouncyCastle.Asn1.X9;
using Org.BouncyCastle.Crypto;
using Org.BouncyCastle.Crypto.Digests;
using Org.BouncyCastle.Crypto.Engines;
using Org.BouncyCastle.Crypto.Generators;
using Org.BouncyCastle.Crypto.Parameters;
using Org.BouncyCastle.Math;
using Org.BouncyCastle.Security;
using Org.BouncyCastle.Utilities;
using Org.BouncyCastle.Utilities.Encoders;
using Org.BouncyCastle.X509;
using System;
using System.Collections.Generic;
using System.IO;

namespace CommonUtils
{
/**
* need lib:
* BouncyCastle.Crypto.dll（http://www.bouncycastle.org/csharp/index.html）

* 用BC的注意点：
* 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。
* 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);”。
*
* 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。
*/
public class GmUtil
{

 //private static readonly ILog log = LogManager.GetLogger(typeof(GmUtil));

 private static X9ECParameters x9ECParameters = GMNamedCurves.GetByName("sm2p256v1");
 private static ECDomainParameters ecDomainParameters = new ECDomainParameters(x9ECParameters.Curve, x9ECParameters.G, x9ECParameters.N);

 /**
 *
 * @param msg
 * @param userId
 * @param privateKey
 * @return r||s，直接拼接byte数组的rs
 */
 public static byte[] SignSm3WithSm2(byte[] msg, byte[] userId, AsymmetricKeyParameter privateKey)
 {
 return RsAsn1ToPlainByteArray(SignSm3WithSm2Asn1Rs(msg, userId, privateKey));
 }

 /**
 * @param msg
 * @param userId
 * @param privateKey
 * @return rs in asn1 format
 */
 public static byte[] SignSm3WithSm2Asn1Rs(byte[] msg, byte[] userId, AsymmetricKeyParameter privateKey)
 {
 try
 {
 ISigner signer = SignerUtilities.GetSigner("SM3withSM2");
 signer.Init(true, new ParametersWithID(privateKey, userId));
 signer.BlockUpdate(msg, 0, msg.Length);
 byte[] sig = signer.GenerateSignature();
 return sig;
 }
 catch (Exception e)
 {
 //log.Error("SignSm3WithSm2Asn1Rs error: " + e.Message, e);
 return null;
 }
 }

 /**
 *
 * @param msg
 * @param userId
 * @param rs r||s，直接拼接byte数组的rs
 * @param publicKey
 * @return
 */
 public static bool VerifySm3WithSm2(byte[] msg, byte[] userId, byte[] rs, AsymmetricKeyParameter publicKey)
 {
 if (rs == null || msg == null || userId == null) return false;
 if (rs.Length != RS_LEN * 2) return false;
 return VerifySm3WithSm2Asn1Rs(msg, userId, RsPlainByteArrayToAsn1(rs), publicKey);
 }

 /**
 *
 * @param msg
 * @param userId
 * @param rs in asn1 format
 * @param publicKey
 * @return
 */

 public static bool VerifySm3WithSm2Asn1Rs(byte[] msg, byte[] userId, byte[] sign, AsymmetricKeyParameter publicKey)
 {
 try
 {
 ISigner signer = SignerUtilities.GetSigner("SM3withSM2");
 signer.Init(false, new ParametersWithID(publicKey, userId));
 signer.BlockUpdate(msg, 0, msg.Length);
 return signer.VerifySignature(sign);
 }
 catch (Exception e)
 {
 //log.Error("VerifySm3WithSm2Asn1Rs error: " + e.Message, e);
 return false;
 }
 }

 /**
 * 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
 * @param c1c2c3
 * @return
 */
 private static byte[] ChangeC1C2C3ToC1C3C2(byte[] c1c2c3)
 {
 int c1Len = (x9ECParameters.Curve.FieldSize + 7) / 8 * 2 + 1; //sm2p256v1的这个固定65。可看GMNamedCurves、ECCurve代码。
 const int c3Len = 32; //new SM3Digest().getDigestSize();
 byte[] result = new byte;
 Buffer.BlockCopy(c1c2c3, 0, result, 0, c1Len); //c1
 Buffer.BlockCopy(c1c2c3, c1c2c3.Length - c3Len, result, c1Len, c3Len); //c3
 Buffer.BlockCopy(c1c2c3, c1Len, result, c1Len + c3Len, c1c2c3.Length - c1Len - c3Len); //c2
 return result;
 }

 /**
 * 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
 * @param c1c3c2
 * @return
 */
 private static byte[] ChangeC1C3C2ToC1C2C3(byte[] c1c3c2)
 {
 int c1Len = (x9ECParameters.Curve.FieldSize + 7) / 8 * 2 + 1; //sm2p256v1的这个固定65。可看GMNamedCurves、ECCurve代码。
 const int c3Len = 32; //new SM3Digest().GetDigestSize();
 byte[] result = new byte;
 Buffer.BlockCopy(c1c3c2, 0, result, 0, c1Len); //c1: 0->65
 Buffer.BlockCopy(c1c3c2, c1Len + c3Len, result, c1Len, c1c3c2.Length - c1Len - c3Len); //c2
 Buffer.BlockCopy(c1c3c2, c1Len, result, c1c3c2.Length - c3Len, c3Len); //c3
 return result;
 }

 /**
 * c1||c3||c2
 * @param data
 * @param key
 * @return
 */
 public static byte[] Sm2Decrypt(byte[] data, AsymmetricKeyParameter key)
 {
 return Sm2DecryptOld(ChangeC1C3C2ToC1C2C3(data), key);
 }

 /**
 * c1||c3||c2
 * @param data
 * @param key
 * @return
 */

 public static byte[] Sm2Encrypt(byte[] data, AsymmetricKeyParameter key)
 {
 return ChangeC1C2C3ToC1C3C2(Sm2EncryptOld(data, key));
 }

 /**
 * c1||c2||c3
 * @param data
 * @param key
 * @return
 */
 public static byte[] Sm2EncryptOld(byte[] data, AsymmetricKeyParameter pubkey)
 {
 try
 {
 SM2Engine sm2Engine = new SM2Engine();
 sm2Engine.Init(true, new ParametersWithRandom(pubkey, new SecureRandom()));
 return sm2Engine.ProcessBlock(data, 0, data.Length);
 }
 catch (Exception e)
 {
 //log.Error("Sm2EncryptOld error: " + e.Message, e);
 return null;
 }
 }

 /**
 * c1||c2||c3
 * @param data
 * @param key
 * @return
 */
 public static byte[] Sm2DecryptOld(byte[] data, AsymmetricKeyParameter key)
 {
 try
 {
 SM2Engine sm2Engine = new SM2Engine();
 sm2Engine.Init(false, key);
 return sm2Engine.ProcessBlock(data, 0, data.Length);
 }
 catch (Exception e)
 {
 //log.Error("Sm2DecryptOld error: " + e.Message, e);
 return null;
 }
 }

 /**
 * @param bytes
 * @return
 */
 public static byte[] Sm3(byte[] bytes)
 {
 try
 {
 SM3Digest digest = new SM3Digest();
 digest.BlockUpdate(bytes, 0, bytes.Length);
 byte[] result = DigestUtilities.DoFinal(digest);
 return result;
 }
 catch (Exception e)
 {
 //log.Error("Sm3 error: " + e.Message, e);
 return null;
 }
 }

 private const int RS_LEN = 32;

 private static byte[] BigIntToFixexLengthBytes(BigInteger rOrS)
 {
 // for sm2p256v1, n is 00fffffffeffffffffffffffffffffffff7203df6b21c6052b53bbf40939d54123,
 // r and s are the result of mod n, so they should be less than n and have length<=32
 byte[] rs = rOrS.ToByteArray();
 if (rs.Length == RS_LEN) return rs;
 else if (rs.Length == RS_LEN + 1 && rs[0] == 0) return Arrays.CopyOfRange(rs, 1, RS_LEN + 1);
 else if (rs.Length < RS_LEN)
 {
 byte[] result = new byte;
 Arrays.Fill(result, (byte)0);
 Buffer.BlockCopy(rs, 0, result, RS_LEN - rs.Length, rs.Length);
 return result;
 }
 else
 {
 throw new ArgumentException("err rs: " + Hex.ToHexString(rs));
 }
 }

 /**
 * 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
 * @param rsDer rs in asn1 format
 * @return sign result in plain byte array
 */
 private static byte[] RsAsn1ToPlainByteArray(byte[] rsDer)
 {
 Asn1Sequence seq = Asn1Sequence.GetInstance(rsDer);
 byte[] r = BigIntToFixexLengthBytes(DerInteger.GetInstance(seq[0]).Value);
 byte[] s = BigIntToFixexLengthBytes(DerInteger.GetInstance(seq[1]).Value);
 byte[] result = new byte;
 Buffer.BlockCopy(r, 0, result, 0, r.Length);
 Buffer.BlockCopy(s, 0, result, RS_LEN, s.Length);
 return result;
 }

 /**
 * 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
 * @param sign in plain byte array
 * @return rs result in asn1 format
 */
 private static byte[] RsPlainByteArrayToAsn1(byte[] sign)
 {
 if (sign.Length != RS_LEN * 2) throw new ArgumentException("err rs. ");
 BigInteger r = new BigInteger(1, Arrays.CopyOfRange(sign, 0, RS_LEN));
 BigInteger s = new BigInteger(1, Arrays.CopyOfRange(sign, RS_LEN, RS_LEN * 2));
 Asn1EncodableVector v = new Asn1EncodableVector();
 v.Add(new DerInteger(r));
 v.Add(new DerInteger(s));
 try
 {
 return new DerSequence(v).GetEncoded("DER");
 }
 catch (IOException e)
 {
 //log.Error("RsPlainByteArrayToAsn1 error: " + e.Message, e);
 return null;
 }
 }

 public static AsymmetricCipherKeyPair GenerateKeyPair()
 {
 try
 {
 ECKeyPairGenerator kpGen = new ECKeyPairGenerator();
 kpGen.Init(new ECKeyGenerationParameters(ecDomainParameters, new SecureRandom()));
 return kpGen.GenerateKeyPair();
 }
 catch (Exception e)
 {
 //log.Error("generateKeyPair error: " + e.Message, e);
 return null;
 }
 }

 public static ECPrivateKeyParameters GetPrivatekeyFromD(BigInteger d)
 {
 return new ECPrivateKeyParameters(d, ecDomainParameters);
 }

 public static ECPublicKeyParameters GetPublickeyFromXY(BigInteger x, BigInteger y)
 {
 return new ECPublicKeyParameters(x9ECParameters.Curve.CreatePoint(x, y), ecDomainParameters);
 }

 public static AsymmetricKeyParameter GetPublickeyFromX509File(FileInfo file)
 {

 FileStream fileStream = null;
 try
 {
 //file.DirectoryName + "\\" + file.Name
 fileStream = new FileStream(file.FullName, FileMode.Open, FileAccess.Read);
 X509Certificate certificate = new X509CertificateParser().ReadCertificate(fileStream);
 return certificate.GetPublicKey();
 }
 catch (Exception e)
 {
 //log.Error(file.Name + "读取失败，异常：" + e);
 }
 finally
 {
 if (fileStream != null)
 fileStream.Close();
 }
 return null;
 }

 public class Sm2Cert
 {
 public AsymmetricKeyParameter privateKey;
 public AsymmetricKeyParameter publicKey;
 public String certId;
 }

 private static byte[] ToByteArray(int i)
 {
 byte[] byteArray = new byte[4];
 byteArray[0] = (byte)(i >> 24);
 byteArray[1] = (byte)((i & 0xFFFFFF) >> 16);
 byteArray[2] = (byte)((i & 0xFFFF) >> 8);
 byteArray[3] = (byte)(i & 0xFF);
 return byteArray;
 }

 /**
 * 字节数组拼接
 *
 * @param params
 * @return
 */
 private static byte[] Join(params byte[][] byteArrays)
 {
 List<byte> byteSource = new List<byte>();
 for (int i = 0; i < byteArrays.Length; i++)
 {
 byteSource.AddRange(byteArrays);
 }
 byte[] data = byteSource.ToArray();
 return data;
 }

 /**
 * 密钥派生函数
 *
 * @param Z
 * @param klen
 * 生成klen字节数长度的密钥
 * @return
 */
 private static byte[] KDF(byte[] Z, int klen)
 {
 int ct = 1;
 int end = (int)Math.Ceiling(klen * 1.0 / 32);
 List<byte> byteSource = new List<byte>();
 try
 {
 for (int i = 1; i < end; i++)
 {
 byteSource.AddRange(GmUtil.Sm3(Join(Z, ToByteArray(ct))));
 ct++;
 }
 byte[] last = GmUtil.Sm3(Join(Z, ToByteArray(ct)));
 if (klen % 32 == 0)
 {
 byteSource.AddRange(last);
 }
 else
 byteSource.AddRange(Arrays.CopyOfRange(last, 0, klen % 32));
 return byteSource.ToArray();
 }
 catch (Exception e)
 {
 //log.Error("KDF error: " + e.Message, e);
 }
 return null;
 }

 public static byte[] Sm4DecryptCBC(byte[] keyBytes, byte[] cipher, byte[] iv, String algo)
 {
 if (keyBytes.Length != 16) throw new ArgumentException("err key length");
 if (cipher.Length % 16 != 0 && algo.Contains("NoPadding")) throw new ArgumentException("err data length");

 try
 {
 KeyParameter key = ParameterUtilities.CreateKeyParameter("SM4", keyBytes);
 IBufferedCipher c = CipherUtilities.GetCipher(algo);
 if (iv == null) iv = ZeroIv(algo);
 c.Init(false, new ParametersWithIV(key, iv));
 return c.DoFinal(cipher);
 }
 catch (Exception e)
 {
 //log.Error("Sm4DecryptCBC error: " + e.Message, e);
 return null;
 }
 }

 public static byte[] Sm4EncryptCBC(byte[] keyBytes, byte[] plain, byte[] iv, String algo)
 {
 if (keyBytes.Length != 16) throw new ArgumentException("err key length");
 if (plain.Length % 16 != 0 && algo.Contains("NoPadding")) throw new ArgumentException("err data length");

 try
 {
 KeyParameter key = ParameterUtilities.CreateKeyParameter("SM4", keyBytes);
 IBufferedCipher c = CipherUtilities.GetCipher(algo);
 if (iv == null) iv = ZeroIv(algo);
 c.Init(true, new ParametersWithIV(key, iv));
 return c.DoFinal(plain);
 }
 catch (Exception e)
 {
 //log.Error("Sm4EncryptCBC error: " + e.Message, e);
 return null;
 }
 }

 public static byte[] Sm4EncryptECB(byte[] keyBytes, byte[] plain, string algo)
 {
 if (keyBytes.Length != 16) throw new ArgumentException("err key length");
 //NoPadding 的情况下需要校验数据长度是16的倍数.
 if (plain.Length % 16 != 0 && algo.Contains("NoPadding")) throw new ArgumentException("err data length");

 try
 {
 KeyParameter key = ParameterUtilities.CreateKeyParameter("SM4", keyBytes);
 IBufferedCipher c = CipherUtilities.GetCipher(algo);
 c.Init(true, key);
 return c.DoFinal(plain);
 }
 catch (Exception e)
 {
 //log.Error("Sm4EncryptECB error: " + e.Message, e);
 return null;
 }
 }

 public static byte[] Sm4DecryptECB(byte[] keyBytes, byte[] cipher, string algo)
 {
 if (keyBytes.Length != 16) throw new ArgumentException("err key length");
 if (cipher.Length % 16 != 0 && algo.Contains("NoPadding")) throw new ArgumentException("err data length");

 try
 {
 KeyParameter key = ParameterUtilities.CreateKeyParameter("SM4", keyBytes);
 IBufferedCipher c = CipherUtilities.GetCipher(algo);
 c.Init(false, key);
 return c.DoFinal(cipher);
 }
 catch (Exception e)
 {
 //log.Error("Sm4DecryptECB error: " + e.Message, e);
 return null;
 }
 }

 public const String SM4_ECB_NOPADDING = "SM4/ECB/NoPadding";
 public const String SM4_CBC_NOPADDING = "SM4/CBC/NoPadding";
 public const String SM4_CBC_PKCS7PADDING = "SM4/CBC/PKCS7Padding";

 /**
 * cfca官网CSP沙箱导出的sm2文件
 * @param pem 二进制原文
 * @param pwd 密码
 * @return
 */
 public static Sm2Cert readSm2File(byte[] pem, String pwd)
 {

 Sm2Cert sm2Cert = new Sm2Cert();
 try
 {
 Asn1Sequence asn1Sequence = (Asn1Sequence)Asn1Object.FromByteArray(pem);
 // ASN1Integer asn1Integer = (ASN1Integer) asn1Sequence.getObjectAt(0); //version=1
 Asn1Sequence priSeq = (Asn1Sequence)asn1Sequence[1];//private key
 Asn1Sequence pubSeq = (Asn1Sequence)asn1Sequence[2];//public key and x509 cert

 // ASN1ObjectIdentifier sm2DataOid = (ASN1ObjectIdentifier) priSeq.getObjectAt(0);
 // ASN1ObjectIdentifier sm4AlgOid = (ASN1ObjectIdentifier) priSeq.getObjectAt(1);
 Asn1OctetString priKeyAsn1 = (Asn1OctetString)priSeq[2];
 byte[] key = KDF(System.Text.Encoding.UTF8.GetBytes(pwd), 32);
 byte[] priKeyD = Sm4DecryptCBC(Arrays.CopyOfRange(key, 16, 32),
 priKeyAsn1.GetOctets(),
 Arrays.CopyOfRange(key, 0, 16), SM4_CBC_PKCS7PADDING);
 sm2Cert.privateKey = GetPrivatekeyFromD(new BigInteger(1, priKeyD));
 // log.Info(Hex.toHexString(priKeyD));

 // ASN1ObjectIdentifier sm2DataOidPub = (ASN1ObjectIdentifier) pubSeq.getObjectAt(0);
 Asn1OctetString pubKeyX509 = (Asn1OctetString)pubSeq[1];
 X509Certificate x509 = (X509Certificate)new X509CertificateParser().ReadCertificate(pubKeyX509.GetOctets());
 sm2Cert.publicKey = x509.GetPublicKey();
 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
 return sm2Cert;
 }
 catch (Exception e)
 {
 //log.Error("readSm2File error: " + e.Message, e);
 return null;
 }
 }

 /**
 *
 * @param cert
 * @return
 */
 public static Sm2Cert ReadSm2X509Cert(byte[] cert)
 {
 Sm2Cert sm2Cert = new Sm2Cert();
 try
 {

 X509Certificate x509 = new X509CertificateParser().ReadCertificate(cert);
 sm2Cert.publicKey = x509.GetPublicKey();
 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
 return sm2Cert;
 }
 catch (Exception e)
 {
 //log.Error("ReadSm2X509Cert error: " + e.Message, e);
 return null;
 }
 }

 public static byte[] ZeroIv(String algo)
 {

 try
 {
 IBufferedCipher cipher = CipherUtilities.GetCipher(algo);
 int blockSize = cipher.GetBlockSize();
 byte[] iv = new byte;
 Arrays.Fill(iv, (byte)0);
 return iv;
 }
 catch (Exception e)
 {
 //log.Error("ZeroIv error: " + e.Message, e);
 return null;
 }
 }

 public static void Main2(string[] s)
 {

 // 随便看看
 //log.Info("GMNamedCurves: ");
 foreach (string e in GMNamedCurves.Names)
 {
 //log.Info(e);
 }
 //log.Info("sm2p256v1 n:" + x9ECParameters.N);
 //log.Info("sm2p256v1 nHex:" + Hex.ToHexString(x9ECParameters.N.ToByteArray()));

 // 生成公私钥对 ---------------------
 AsymmetricCipherKeyPair kp = GmUtil.GenerateKeyPair();
 //log.Info("private key d: " + ((ECPrivateKeyParameters)kp.Private).D);
 //log.Info("public key q:" + ((ECPublicKeyParameters)kp.Public).Q); //{x, y, zs...}

 //签名验签
 byte[] msg = System.Text.Encoding.UTF8.GetBytes("message digest");
 byte[] userId = System.Text.Encoding.UTF8.GetBytes("userId");
 byte[] sig = SignSm3WithSm2(msg, userId, kp.Private);
 //log.Info("testSignSm3WithSm2: " + Hex.ToHexString(sig));
 //log.Info("testVerifySm3WithSm2: " + VerifySm3WithSm2(msg, userId, sig, kp.Public));

 // 由d生成私钥 ---------------------
 BigInteger d = new BigInteger("097b5230ef27c7df0fa768289d13ad4e8a96266f0fcb8de40d5942af4293a54a", 16);
 ECPrivateKeyParameters bcecPrivateKey = GetPrivatekeyFromD(d);
 //log.Info("testGetFromD: " + bcecPrivateKey.D.ToString(16));

 //公钥X坐标PublicKeyXHex: 59cf9940ea0809a97b1cbffbb3e9d96d0fe842c1335418280bfc51dd4e08a5d4
 //公钥Y坐标PublicKeyYHex: 9a7f77c578644050e09a9adc4245d1e6eba97554bc8ffd4fe15a78f37f891ff8
 AsymmetricKeyParameter publicKey = GetPublickeyFromX509File(new FileInfo("d:/certs/69629141652.cer"));
 //log.Info(publicKey);
 AsymmetricKeyParameter publicKey1 = GetPublickeyFromXY(new BigInteger("59cf9940ea0809a97b1cbffbb3e9d96d0fe842c1335418280bfc51dd4e08a5d4", 16), new BigInteger("9a7f77c578644050e09a9adc4245d1e6eba97554bc8ffd4fe15a78f37f891ff8", 16));
 //log.Info("testReadFromX509File: " + ((ECPublicKeyParameters)publicKey).Q);
 //log.Info("testGetFromXY: " + ((ECPublicKeyParameters)publicKey1).Q);
 //log.Info("testPubKey: " + publicKey.Equals(publicKey1));
 //log.Info("testPubKey: " + ((ECPublicKeyParameters)publicKey).Q.Equals(((ECPublicKeyParameters)publicKey1).Q));

 // sm2 encrypt and decrypt test ---------------------
 AsymmetricCipherKeyPair kp2 = GenerateKeyPair();
 AsymmetricKeyParameter publicKey2 = kp2.Public;
 AsymmetricKeyParameter privateKey2 = kp2.Private;
 byte[] bs = Sm2Encrypt(System.Text.Encoding.UTF8.GetBytes("s"), publicKey2);
 //log.Info("testSm2Enc dec: " + Hex.ToHexString(bs));
 bs = Sm2Decrypt(bs, privateKey2);
 //log.Info("testSm2Enc dec: " + System.Text.Encoding.UTF8.GetString(bs));

 // sm4 encrypt and decrypt test ---------------------
 //0123456789abcdeffedcba9876543210 + 0123456789abcdeffedcba9876543210 -> 681edf34d206965e86b3e94f536e4246
 byte[] plain = Hex.Decode("0123456789abcdeffedcba98765432100123456789abcdeffedcba98765432100123456789abcdeffedcba9876543210");
 byte[] key = Hex.Decode("0123456789abcdeffedcba9876543210");
 byte[] cipher = Hex.Decode("595298c7c6fd271f0402f804c33d3f66");
 bs = Sm4EncryptECB(key, plain, GmUtil.SM4_ECB_NOPADDING);
 //log.Info("testSm4EncEcb: " + Hex.ToHexString(bs)); ;
 bs = Sm4DecryptECB(key, bs, GmUtil.SM4_ECB_NOPADDING);
 //log.Info("testSm4DecEcb: " + Hex.ToHexString(bs));

 //读.sm2文件
 String sm2 = "MIIDHQIBATBHBgoqgRzPVQYBBAIBBgcqgRzPVQFoBDDW5/I9kZhObxXE9Vh1CzHdZhIhxn+3byBU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\nVfY6";
 bs = Convert.FromBase64String(sm2);
 String pwd = "cfca1234";
 GmUtil.Sm2Cert sm2Cert = GmUtil.readSm2File(bs, pwd);
 //log.Info("testReadSm2File, pubkey: " + ((ECPublicKeyParameters)sm2Cert.publicKey).Q.ToString());
 //log.Info("testReadSm2File, prikey: " + Hex.ToHexString(((ECPrivateKeyParameters)sm2Cert.privateKey).D.ToByteArray()));
 //log.Info("testReadSm2File, certId: " + sm2Cert.certId);

 bs = Sm2Encrypt(System.Text.Encoding.UTF8.GetBytes("s"), ((ECPublicKeyParameters)sm2Cert.publicKey));
 //log.Info("testSm2Enc dec: " + Hex.ToHexString(bs));
 bs = Sm2Decrypt(bs, ((ECPrivateKeyParameters)sm2Cert.privateKey));
 //log.Info("testSm2Enc dec: " + System.Text.Encoding.UTF8.GetString(bs));

 msg = System.Text.Encoding.UTF8.GetBytes("message digest");
 userId = System.Text.Encoding.UTF8.GetBytes("userId");
 sig = SignSm3WithSm2(msg, userId, ((ECPrivateKeyParameters)sm2Cert.privateKey));
 //log.Info("testSignSm3WithSm2: " + Hex.ToHexString(sig));
 //log.Info("testVerifySm3WithSm2: " + VerifySm3WithSm2(msg, userId, sig, ((ECPublicKeyParameters)sm2Cert.publicKey)));
 }

}
}</pre>
</div>
.NET使用：
<div class="cnblogs_code">
<pre>using CommonUtils;
using Org.BouncyCastle.Crypto;
using Org.BouncyCastle.Math;
using Org.BouncyCastle.Utilities.Encoders;
using System.Text;

void TestSM2Sign()
{
string userId = "1234567812345678";
byte[] byUserId = Encoding.UTF8.GetBytes(userId);
String privateKeyHex = "FAB8BBE670FAE338C9E9382B9FB6485225C11A3ECB84C938F10F20A93B6215F0";
string pubKeyHex = "049EF573019D9A03B16B0BE44FC8A5B4E8E098F56034C97B312282DD0B4810AFC3CC759673ED0FC9B9DC7E6FA38F0E2B121E02654BF37EA6B63FAF2A0D6013EADF";
//如果是130位公钥，.NET 使用的话，把开头的04截取掉。
if (pubKeyHex.Length == 130)
{
 pubKeyHex = pubKeyHex.Substring(2, 128);
}
//公钥X，前64位
String x = pubKeyHex.Substring(0, 64);
//公钥Y，后64位
String y = pubKeyHex.Substring(64);
//获取公钥对象
AsymmetricKeyParameter publicKey1 = GmUtil.GetPublickeyFromXY(new BigInteger(x, 16), new BigInteger(y, 16));
BigInteger d = new BigInteger(privateKeyHex, 16);
//获取私钥对象，用ECPrivateKeyParameters 或 AsymmetricKeyParameter 都可以
//ECPrivateKeyParameters bcecPrivateKey = CommonUtils.GmUtil.GetPrivatekeyFromD(d);
AsymmetricKeyParameter bcecPrivateKey = CommonUtils.GmUtil.GetPrivatekeyFromD(d);

String content = "1234泰酷拉NET";
Console.WriteLine("待处理字符串：" + content);
//SignSm3WithSm2 是RS，SignSm3WithSm2Asn1Rs 是 asn1
byte[] digestByte = GmUtil.SignSm3WithSm2(Encoding.UTF8.GetBytes(content), byUserId, bcecPrivateKey);
string strSM2 = Convert.ToBase64String(digestByte);
Console.WriteLine("SM2加签后：" + strSM2);

//.NET 验签 
byte[] byToProc = Convert.FromBase64String(strSM2);
//顺序：报文，userId，签名值，公钥。
bool verifySign = GmUtil.VerifySm3WithSm2(Encoding.UTF8.GetBytes(content), byUserId, byToProc, publicKey1);

Console.WriteLine("SM2 验签：" + verifySign.ToString());

//JAVA 签名 .NET验签
string javaContent = "1234泰酷拉JJ"; //注意：报文要和JAVA一致
Console.WriteLine("javaContent：" + javaContent);
string javaSM2 = "MEUCIF5PXxIlF0NmQaUtfIGLbZm4JuYT4bkYyoFMA/eIqVaUAiEAkRT3GkrtY2YtUSF9Ya0jOLRMcMUuHNLiWPTy591vnco=";

Console.WriteLine("javaSM2签名结果：" + javaSM2);
byToProc = Convert.FromBase64String(javaSM2);
//注意：JAVA HUTOOL - sm2.sign 结果格式是 asn1 的，我们得用 VerifySm3WithSm2Asn1Rs。
verifySign = GmUtil.VerifySm3WithSm2Asn1Rs(Encoding.UTF8.GetBytes(javaContent), byUserId, byToProc, publicKey1);

Console.WriteLine("JAVA SM2 验签：" + verifySign.ToString());
}</pre>
</div>
 
java代码：
maven 引用：
<div class="cnblogs_code">
<pre><dependency>
 <groupId>cn.hutool</groupId>
 <artifactId>hutool-all</artifactId>
 <version>5.8.1</version>
</dependency>

<dependency>
 <groupId>org.bouncycastle</groupId>
 <artifactId>bcprov-jdk15on</artifactId>
 <version>1.70</version>
</dependency></pre>
</div>
JAVA调用：
<div class="cnblogs_code">
<pre>package org.example;

import cn.hutool.crypto.SmUtil;
import cn.hutool.crypto.asymmetric.KeyType;
import cn.hutool.crypto.asymmetric.SM2;
import org.bouncycastle.crypto.engines.SM2Engine;
import org.bouncycastle.util.encoders.Hex;
import java.util.Base64;

static void testSM2Sign() {

 String content = "1234泰酷拉JJ";
 System.out.println("待处理字符串：" + content);
 String userId = "1234567812345678";
 byte[] byUserId = userId.getBytes();

 //私钥
 String privateKeyHex = "FAB8BBE670FAE338C9E9382B9FB6485225C11A3ECB84C938F10F20A93B6215F0";
 //公钥X
 String x = "9EF573019D9A03B16B0BE44FC8A5B4E8E098F56034C97B312282DD0B4810AFC3";
 //公钥Y
 String y = "CC759673ED0FC9B9DC7E6FA38F0E2B121E02654BF37EA6B63FAF2A0D6013EADF";
 //构造函数里，私钥或公钥，其中一方可为空 null
 SM2 sm2 = new SM2(privateKeyHex, x, y);
 byte[] byRst = sm2.sign(content.getBytes(), byUserId);
 String sm2Sign = Base64.getEncoder().encodeToString(byRst);
 System.out.println("sm2 BASE64 签名:" + sm2Sign);

 byte[] bySign = Base64.getDecoder().decode(sm2Sign);
 boolean verifySign = sm2.verify(content.getBytes(), bySign, byUserId);

 System.out.println("SM2 验签：" + verifySign);
}</pre>
</div>
 
end
  
来源：https://www.cnblogs.com/runliuv/p/17610966.html

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

C#.NET 国密SM2 签名验签与JAVA互通 ver:20230807