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：
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 <b>asn1 format</b> */ 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 <b>asn1 format</b> * @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[c1c2c3.Length]; 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[c1c3c2.Length]; 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[RS_LEN]; 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[RS_LEN * 2]; 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[i]); } 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[blockSize]; 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))); } } }
C#调用DEMO：
//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); } }
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：
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[32]; 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 <b>asn1 format</b> */ 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[RS_LEN * 2]; 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] == 0) { return Arrays.copyOfRange(rs, 1, RS_LEN + 1); } else if (rs.length < RS_LEN) { byte[] result = new byte[RS_LEN]; 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 <b>asn1 format</b> * @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))); // } }
JAVA调用 DEMO：
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; } }
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。
（图1）
（图2）
