C#.NET 国密SM3withSM2签名与验签和JAVA互通

是的咧 發表於 2021-7-30 14:20:00

C#.NET 国密SM3withSM2签名与验签和JAVA互通

C# 基于.NET FRAMEWORK 4.5
JAVA 基于 JDK1.8
一、要点
1.签名算法：SM3withSM2。
2.签名值byte[] 转字符串时，双方要统一，这里是BASE64。
 
二、工具类和调用DEMO
C#
引用了BouncyCastle.Crypto类库，在nuget上下载最新即可。
工具类：
<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) 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) 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");
 if (plain.Length % 16 != 0) 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) 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>
C#调用DEMO：
<div class="cnblogs_code">
<pre>//签名
 private void btnSign_Click(object sender, EventArgs e)
 {
 try
 {
 if (string.IsNullOrWhiteSpace(txtPrivateKey.Text) || string.IsNullOrWhiteSpace(txtUserId.Text) || string.IsNullOrWhiteSpace(txtToSignStr.Text))
 {
 MessageBox.Show("私钥,USERID,签名字符串不能为空。");
 return;
 }

 // 由d生成私钥 ---------------------
 BigInteger d = new BigInteger(txtPrivateKey.Text, 16);
 ECPrivateKeyParameters bcecPrivateKey = CommonUtils.GmUtil.GetPrivatekeyFromD(d);
 byte[] userId = Encoding.UTF8.GetBytes(txtUserId.Text);

 byte[] msg = System.Text.Encoding.UTF8.GetBytes(txtToSignStr.Text);
 byte[] sig = GmUtil.SignSm3WithSm2(msg, userId, bcecPrivateKey);

 //byte[] bytTmp = Hex.Decode(txtSign.Text);
 txtSign.Text = Convert.ToBase64String(sig);

 string sign16 = Hex.ToHexString(sig);
 }
 catch (Exception ex)
 {

 MessageBox.Show(ex.Message);
 }
 }

 //验签
 private void button1_Click(object sender, EventArgs e)
 {
 try
 {
 if (string.IsNullOrWhiteSpace(txtPubKey.Text) || string.IsNullOrWhiteSpace(txtUserId.Text) || string.IsNullOrWhiteSpace(txtToSignStr.Text)
 || string.IsNullOrWhiteSpace(txtSign.Text))
 {
 MessageBox.Show("公钥,USERID,签名字符串，签名值不能为空。");
 return;
 }
 //公钥128位，拆成2个64位。
 string pa = txtPubKey.Text.Substring(0, 64);
 string pb = txtPubKey.Text.Substring(64, 64);

 AsymmetricKeyParameter publicKey1 = GmUtil.GetPublickeyFromXY(new BigInteger(pa, 16), new BigInteger(pb, 16));

 byte[] userId = Encoding.UTF8.GetBytes(txtUserId.Text);
 byte[] msg = System.Text.Encoding.UTF8.GetBytes(txtToSignStr.Text);
 //byte[] bytSig = Hex.Decode(txtSign.Text);
 byte[] bytSig = Convert.FromBase64String(txtSign.Text);
 bool bRst = GmUtil.VerifySm3WithSm2(msg, userId, bytSig, publicKey1);
 if (bRst)
 {
 lblValidRst.Text = "验证：通过 "+DateTime.Now.ToString();
 }
 else
 {
 lblValidRst.Text = "验证：不通过 " + DateTime.Now.ToString();
 }
 }
 catch (Exception ex)
 {

 MessageBox.Show(ex.Message);
 }
 }</pre>
</div>
 
JAVA
引用了commons-codec-1.9.jar  （转换BASE64），bcprov-jdk15on-169.jar （国密算法，从Bouncy Castle官网下载）
工具类：
<div class="cnblogs_code">
<pre>package org.lw;

//import lombok.extern.slf4j.Slf4j;
import org.apache.commons.codec.binary.Base64;
import org.bouncycastle.asn1.ASN1EncodableVector;
import org.bouncycastle.asn1.ASN1Integer;
import org.bouncycastle.asn1.ASN1Sequence;
import org.bouncycastle.asn1.DERSequence;
import org.bouncycastle.asn1.gm.GMNamedCurves;
import org.bouncycastle.asn1.x9.X9ECParameters;
import org.bouncycastle.crypto.digests.SM3Digest;
import org.bouncycastle.crypto.params.ECDomainParameters;
import org.bouncycastle.jcajce.provider.asymmetric.ec.BCECPrivateKey;
import org.bouncycastle.jcajce.provider.asymmetric.ec.BCECPublicKey;
import org.bouncycastle.jcajce.spec.SM2ParameterSpec;
import org.bouncycastle.jce.provider.BouncyCastleProvider;
import org.bouncycastle.jce.spec.ECParameterSpec;
import org.bouncycastle.jce.spec.ECPrivateKeySpec;
import org.bouncycastle.jce.spec.ECPublicKeySpec;
import org.bouncycastle.math.ec.ECPoint;
import org.bouncycastle.util.encoders.Hex;
//import org.junit.Test;

import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.math.BigInteger;
import java.security.*;
import java.security.spec.ECGenParameterSpec;
import java.util.Arrays;

//@Slf4j
public class SmUtil {

private final static int RS_LEN = 32;
private static X9ECParameters x9ECParameters = GMNamedCurves.getByName("sm2p256v1");
private static ECDomainParameters ecDomainParameters = new ECDomainParameters(x9ECParameters.getCurve(), x9ECParameters.getG(), x9ECParameters.getN());
private static ECParameterSpec ecParameterSpec = new ECParameterSpec(x9ECParameters.getCurve(), x9ECParameters.getG(), x9ECParameters.getN());

static {
 if (Security.getProvider("BC") == null) {
 Security.addProvider(new BouncyCastleProvider());
 }
}

/**
* 生成sm3摘要
*
* @param src
* @return
* @throws UnsupportedEncodingException
*/
public static String generateSM3HASH(String src) throws UnsupportedEncodingException {
 byte[] md = new byte;
 byte[] msg1 = src.getBytes("utf-8");
 SM3Digest sm3 = new SM3Digest();
 sm3.update(msg1, 0, msg1.length);
 sm3.doFinal(md, 0);
 String s = new String(Hex.encode(md)).toUpperCase();
// log.debug("SM3摘要：{}", s);
 return s;
}

public static String signSm3WithSm2(String msg, String userId, String privateKey) throws Exception {
 BCECPrivateKey bcecPrivateKey = getPrivatekeyFromD(privateKey);
 String sign = Base64.encodeBase64String(signSm3WithSm2(msg.getBytes("utf-8"), userId.getBytes("utf-8"), bcecPrivateKey));
// log.debug("生成的签名：{}", sign);
 return sign;
}

public static BCECPrivateKey getPrivatekeyFromD(String privateKey) {
 ECPrivateKeySpec ecPrivateKeySpec = new ECPrivateKeySpec(new BigInteger(privateKey, 16), ecParameterSpec);
 return new BCECPrivateKey("EC", ecPrivateKeySpec, BouncyCastleProvider.CONFIGURATION);
}

/**
* @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, PrivateKey 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, PrivateKey privateKey) {
 try {
 SM2ParameterSpec parameterSpec = new SM2ParameterSpec(userId);
 Signature signer = Signature.getInstance("SM3withSM2", "BC");
 signer.setParameter(parameterSpec);
 signer.initSign(privateKey, new SecureRandom());
 signer.update(msg, 0, msg.length);
 byte[] sig = signer.sign();
 return sig;
 } catch (Exception e) {
 throw new RuntimeException(e);
 }
}

/**
* 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(ASN1Integer.getInstance(seq.getObjectAt(0)).getValue());
 byte[] s = bigIntToFixexLengthBytes(ASN1Integer.getInstance(seq.getObjectAt(1)).getValue());
 byte[] result = new byte;
 System.arraycopy(r, 0, result, 0, r.length);
 System.arraycopy(s, 0, result, RS_LEN, s.length);
 return result;
}

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) {
 return Arrays.copyOfRange(rs, 1, RS_LEN + 1);
 } else if (rs.length < RS_LEN) {
 byte[] result = new byte;
 Arrays.fill(result, (byte) 0);
 System.arraycopy(rs, 0, result, RS_LEN - rs.length, rs.length);
 return result;
 } else {
 throw new RuntimeException("err rs: " + Hex.toHexString(rs));
 }
}

/**
* @param msg
* @param userId
* @param rs 签名
* @param publicKey
* @return
*/
public static boolean verifySm3WithSm2(String msg, String userId, String rs, String publicKey) throws Exception {
 return verifySm3WithSm2(msg.getBytes("utf-8"), userId.getBytes("utf-8"), Base64.decodeBase64(rs), getBCECPublicKeyFromD(publicKey));
}

/**
* @param msg
* @param userId
* @param rs r||s，直接拼接byte数组的rs
* @param publicKey
* @return
*/
public static boolean verifySm3WithSm2(byte[] msg, byte[] userId, byte[] rs, PublicKey publicKey) {
 return verifySm3WithSm2Asn1Rs(msg, userId, rsPlainByteArrayToAsn1(rs), publicKey);
}

/**
* 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 RuntimeException("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 ASN1Integer(r));
 v.add(new ASN1Integer(s));
 try {
 return new DERSequence(v).getEncoded("DER");
 } catch (IOException e) {
 throw new RuntimeException(e);
 }
}

/**
* @param msg
* @param userId
* @param rs in asn1 format
* @param publicKey
* @return
*/
public static boolean verifySm3WithSm2Asn1Rs(byte[] msg, byte[] userId, byte[] rs, PublicKey publicKey) {
 try {
 SM2ParameterSpec parameterSpec = new SM2ParameterSpec(userId);
 Signature verifier = Signature.getInstance("SM3withSM2", new BouncyCastleProvider());
 verifier.setParameter(parameterSpec);
 verifier.initVerify(publicKey);
 verifier.update(msg, 0, msg.length);
 return verifier.verify(rs);
 } catch (Exception e) {
 throw new RuntimeException(e);
 }
}

/**
* 转成公钥对象
*
* @param pubKey
* @return
*/
public static PublicKey getBCECPublicKeyFromD(String pubKey) throws Exception {
 //TODO 不知道为什么在公钥前加04才不会有问题
 final String prefix = "04";
 if (!pubKey.startsWith(prefix)) {
 pubKey = prefix + pubKey;
 }
 // 将公钥HEX字符串转换为椭圆曲线对应的点
 ECPoint ecPoint = x9ECParameters.getCurve().decodePoint(Hex.decode(pubKey));
 ECPublicKeySpec eCPublicKeySpec = new ECPublicKeySpec(ecPoint, ecParameterSpec);
 return new BCECPublicKey("EC", eCPublicKeySpec, BouncyCastleProvider.CONFIGURATION);

}

// /**
// * 国密公私钥生成
// *
// * @throws NoSuchAlgorithmException
// * @throws InvalidAlgorithmParameterException
// */
// @Test
// public void test11() throws NoSuchAlgorithmException, InvalidAlgorithmParameterException {
// // 获取SM2椭圆曲线的参数
// final ECGenParameterSpec sm2Spec = new ECGenParameterSpec("sm2p256v1");
// // 获取一个椭圆曲线类型的密钥对生成器
// final KeyPairGenerator kpg = KeyPairGenerator.getInstance("EC", new BouncyCastleProvider());
// // 使用SM2参数初始化生成器
// kpg.initialize(sm2Spec);
//
// // 使用SM2的算法区域初始化密钥生成器
// kpg.initialize(sm2Spec, new SecureRandom());
// // 获取密钥对
// KeyPair keyPair = kpg.generateKeyPair();
//
// log.info(Hex.toHexString(((BCECPrivateKey) keyPair.getPrivate()).getD().toByteArray()));
// log.info(Hex.toHexString(((BCECPublicKey) keyPair.getPublic()).getQ().getEncoded(false)));
// }

}</pre>
</div>
JAVA调用 DEMO：
<div class="cnblogs_code">
<pre>package org.lw;

import java.text.SimpleDateFormat;
import java.time.LocalDateTime;
import java.time.format.DateTimeFormatter;
import java.util.Date;

public class Main {

public static void main(String[] args) {

 //国密私钥
 String strPrivateKey = "022A88CD5B5B3F56500615EF380C245CE81F32E980BB0CC708D01F9BD8558FEF";
 //国密 userId
 String strUserId = "123456789";
 //待签名内容
 String strBody = "签名报文字符串123456";

 try {
 //签名值
 String strSign = SmUtil.signSm3WithSm2(strBody, strUserId, strPrivateKey);
 System.out.println(getNow() + " 签名结果：" + strSign);

 //C#.NET 签名值
 // strSign="aBqRJHtnPJvYJNL6C+KoH0BGYmO+3tRJ/IK5TYHuxdqcD41Nr5z2/bq1zx3m2nrPxB/imLpIUQmR/EpubiS/Ig==";
 //国密公钥
 String strPubKey = "3D3AA4732B56DFCC643CF1B0ABAF75EF9EC16A756C18967090E8250E0A49915EEFDD5CBE16BB34CC93B20D3EFB4C842FFCE13887FE211DAE33DFD2AD025265D6";
 //验证签名
 boolean bRst = SmUtil.verifySm3WithSm2(strBody, strUserId, strSign, strPubKey);
 System.out.println(getNow() + " 验证签名：" + bRst);
 } catch (Exception ex) {
 System.out.println(ex.getMessage());
 }
}

public static String getNow() {
 String formatStr = "yyyy-MM-dd HH:mm:ss.SSS";
 LocalDateTime lnow = LocalDateTime.now();
 DateTimeFormatter dateTimeFormatter = DateTimeFormatter.ofPattern(formatStr);
 String nowFormat = lnow.format(dateTimeFormatter);
 return nowFormat;
}

}</pre>
</div>
 
C#和JAVA，使用的私钥，公钥，userId，待签名字符串是一致的。
私钥：022A88CD5B5B3F56500615EF380C245CE81F32E980BB0CC708D01F9BD8558FEF
公钥：3D3AA4732B56DFCC643CF1B0ABAF75EF9EC16A756C18967090E8250E0A49915EEFDD5CBE16BB34CC93B20D3EFB4C842FFCE13887FE211DAE33DFD2AD025265D6
userId：123456789
待签名字符串：签名报文字符串123456
 
C#和JAVA源码地址：https://gitee.com/runliuv/mypub/tree/master/donetproj
"donet国密签名SM3withSM2"文件夹。
javagm 是JAVA 项目，用IDEA 社区版打开。 WindowsForms国密GmUtil 是C#.NET 项目，用VS2015及以上打开。
 
<img src="https://img2020.cnblogs.com/blog/59803/202107/59803-20210730144610368-606139867.png" alt="" loading="lazy">
（图1）
<img src="https://img2020.cnblogs.com/blog/59803/202107/59803-20210730144624545-1346225845.png" alt="" loading="lazy">
（图2） 
来源：https://www.cnblogs.com/runliuv/p/15079404.html

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C#.NET 国密SM3withSM2签名与验签 和JAVA互通

C#.NET 国密SM3withSM2签名与验签和JAVA互通