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
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;//@Slf4jpublic 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）
来源https://www.cnblogs.com/runliuv/p/15079404.html