C#.NET 国密SM2 加密解密 与JAVA互通 ver:20230805
C#.NET 国密SM2 加密解密 与JAVA互通 ver:20230805
.NET 环境：.NET6 控制台程序(.net core)。
JAVA 环境：JAVA8，带maven 的JAVA控制台程序。
简要解析：
1.最好要到对方源码(DEMO+JAR包也可以)，可以用IDEA反编译（Ctrl+鼠标左键），看它过程逻辑和加密结果格式。
2.加密结果顺序：早期是 C1C2C3，后期是C1C3C2 ，双方得约定好。
3.加密结果：BASE64字符串或16进制字符串 ，双方得约定好。
4. .NET BC库SM2加密结果会带04，如果JAVA 那边报 Invalid point encoding 错误，删除加密结果前的04。如果对方要的是BASE64的加密结果，我们可以先转16进制字符串，裁掉04，再转BASE64。
string newCipherText = Hex.ToHexString(bysm2keyEncrypted);
if (newCipherText.StartsWith("04"))
{
newCipherText = newCipherText.Substring(2);
}
5. .NET BC库解密，密文前要加 “04”，否则会报 Invalid point encoding XX 。如果加密结果是BASE64的，先把BASE64转16进制字符串，再判断是否04开头。
如果JAVA源码，固定截取的头2位，那么就不用判断是否04开头了，直接写死：javaSM2 = "04" + javaSM2;
生成一组国密公私钥：
私钥：FAB8BBE670FAE338C9E9382B9FB6485225C11A3ECB84C938F10F20A93B6215F0
公钥：049EF573019D9A03B16B0BE44FC8A5B4E8E098F56034C97B312282DD0B4810AFC3CC759673ED0FC9B9DC7E6FA38F0E2B121E02654BF37EA6B63FAF2A0D6013EADF
本例是：C1C3C2。
//GmUtil.Sm2Encrypt 对应 C1C3C2
// GmUtil.Sm2EncryptOld ：C1C2C3
.NET 代码：
GmUtil 工具类，需要nuget下载 Portable.BouncyCastle 1.9.0 版本：
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 && algo.Contains("NoPadding")) throw new ArgumentException("err data length");
try
{
KeyParameter key = ParameterUtilities.CreateKeyParameter("SM4", keyBytes);
IBufferedCipher c = CipherUtilities.GetCipher(algo);
if (iv == null) iv = ZeroIv(algo);
c.Init(false, new ParametersWithIV(key, iv));
return c.DoFinal(cipher);
}
catch (Exception e)
{
//log.Error("Sm4DecryptCBC error: " + e.Message, e);
return null;
}
}
public static byte[] Sm4EncryptCBC(byte[] keyBytes, byte[] plain, byte[] iv, String algo)
{
if (keyBytes.Length != 16) throw new ArgumentException("err key length");
if (plain.Length % 16 != 0 && algo.Contains("NoPadding")) throw new ArgumentException("err data length");
try
{
KeyParameter key = ParameterUtilities.CreateKeyParameter("SM4", keyBytes);
IBufferedCipher c = CipherUtilities.GetCipher(algo);
if (iv == null) iv = ZeroIv(algo);
c.Init(true, new ParametersWithIV(key, iv));
return c.DoFinal(plain);
}
catch (Exception e)
{
//log.Error("Sm4EncryptCBC error: " + e.Message, e);
return null;
}
}
public static byte[] Sm4EncryptECB(byte[] keyBytes, byte[] plain, string algo)
{
if (keyBytes.Length != 16) throw new ArgumentException("err key length");
//NoPadding 的情况下需要校验数据长度是16的倍数.
if (plain.Length % 16 != 0 && algo.Contains("NoPadding")) throw new ArgumentException("err data length");
try
{
KeyParameter key = ParameterUtilities.CreateKeyParameter("SM4", keyBytes);
IBufferedCipher c = CipherUtilities.GetCipher(algo);
c.Init(true, key);
return c.DoFinal(plain);
}
catch (Exception e)
{
//log.Error("Sm4EncryptECB error: " + e.Message, e);
return null;
}
}
public static byte[] Sm4DecryptECB(byte[] keyBytes, byte[] cipher, string algo)
{
if (keyBytes.Length != 16) throw new ArgumentException("err key length");
if (cipher.Length % 16 != 0 && algo.Contains("NoPadding")) throw new ArgumentException("err data length");
try
{
KeyParameter key = ParameterUtilities.CreateKeyParameter("SM4", keyBytes);
IBufferedCipher c = CipherUtilities.GetCipher(algo);
c.Init(false, key);
return c.DoFinal(cipher);
}
catch (Exception e)
{
//log.Error("Sm4DecryptECB error: " + e.Message, e);
return null;
}
}
public const String SM4_ECB_NOPADDING = "SM4/ECB/NoPadding";
public const String SM4_CBC_NOPADDING = "SM4/CBC/NoPadding";
public const String SM4_CBC_PKCS7PADDING = "SM4/CBC/PKCS7Padding";
/**
* cfca官网CSP沙箱导出的sm2文件
* @param pem 二进制原文
* @param pwd 密码
* @return
*/
public static Sm2Cert readSm2File(byte[] pem, String pwd)
{
Sm2Cert sm2Cert = new Sm2Cert();
try
{
Asn1Sequence asn1Sequence = (Asn1Sequence)Asn1Object.FromByteArray(pem);
// ASN1Integer asn1Integer = (ASN1Integer) asn1Sequence.getObjectAt(0); //version=1
Asn1Sequence priSeq = (Asn1Sequence)asn1Sequence[1];//private key
Asn1Sequence pubSeq = (Asn1Sequence)asn1Sequence[2];//public key and x509 cert
// ASN1ObjectIdentifier sm2DataOid = (ASN1ObjectIdentifier) priSeq.getObjectAt(0);
// ASN1ObjectIdentifier sm4AlgOid = (ASN1ObjectIdentifier) priSeq.getObjectAt(1);
Asn1OctetString priKeyAsn1 = (Asn1OctetString)priSeq[2];
byte[] key = KDF(System.Text.Encoding.UTF8.GetBytes(pwd), 32);
byte[] priKeyD = Sm4DecryptCBC(Arrays.CopyOfRange(key, 16, 32),
priKeyAsn1.GetOctets(),
Arrays.CopyOfRange(key, 0, 16), SM4_CBC_PKCS7PADDING);
sm2Cert.privateKey = GetPrivatekeyFromD(new BigInteger(1, priKeyD));
// log.Info(Hex.toHexString(priKeyD));
// ASN1ObjectIdentifier sm2DataOidPub = (ASN1ObjectIdentifier) pubSeq.getObjectAt(0);
Asn1OctetString pubKeyX509 = (Asn1OctetString)pubSeq[1];
X509Certificate x509 = (X509Certificate)new X509CertificateParser().ReadCertificate(pubKeyX509.GetOctets());
sm2Cert.publicKey = x509.GetPublicKey();
sm2Cert.certId = x509.SerialNumber.ToString(10); //这里转10进账，有啥其他进制要求的自己改改
return sm2Cert;
}
catch (Exception e)
{
//log.Error("readSm2File error: " + e.Message, e);
return null;
}
}
/**
*
* @param cert
* @return
*/
public static Sm2Cert ReadSm2X509Cert(byte[] cert)
{
Sm2Cert sm2Cert = new Sm2Cert();
try
{
X509Certificate x509 = new X509CertificateParser().ReadCertificate(cert);
sm2Cert.publicKey = x509.GetPublicKey();
sm2Cert.certId = x509.SerialNumber.ToString(10); //这里转10进账，有啥其他进制要求的自己改改
return sm2Cert;
}
catch (Exception e)
{
//log.Error("ReadSm2X509Cert error: " + e.Message, e);
return null;
}
}
public static byte[] ZeroIv(String algo)
{
try
{
IBufferedCipher cipher = CipherUtilities.GetCipher(algo);
int blockSize = cipher.GetBlockSize();
byte[] iv = new byte[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)));
}
}
}
.NET使用：
using CommonUtils;
using Org.BouncyCastle.Crypto;
using Org.BouncyCastle.Math;
using Org.BouncyCastle.Utilities.Encoders;
using System.Text;
void TestSM2Enc()
{
String privateKeyHex = "FAB8BBE670FAE338C9E9382B9FB6485225C11A3ECB84C938F10F20A93B6215F0";
//完整公钥128位“9EF573019D9A03B16B0BE44FC8A5B4E8E098F56034C97B312282DD0B4810AFC3CC759673ED0FC9B9DC7E6FA38F0E2B121E02654BF37EA6B63FAF2A0D6013EADF”
//完整公钥130位，比128位开头多了04“049EF573019D9A03B16B0BE44FC8A5B4E8E098F56034C97B312282DD0B4810AFC3CC759673ED0FC9B9DC7E6FA38F0E2B121E02654BF37EA6B63FAF2A0D6013EADF”
string pubKeyHex = "049EF573019D9A03B16B0BE44FC8A5B4E8E098F56034C97B312282DD0B4810AFC3CC759673ED0FC9B9DC7E6FA38F0E2B121E02654BF37EA6B63FAF2A0D6013EADF";
//如果是130位公钥，.NET 使用的话，把开头的04截取掉。
if (pubKeyHex.Length == 130)
{
pubKeyHex = pubKeyHex.Substring(2, 128);
}
//公钥X，前64位
String x = pubKeyHex.Substring(0, 64);
//公钥Y，后64位
String y = pubKeyHex.Substring(64);
//获取公钥对象
AsymmetricKeyParameter publicKey1 = GmUtil.GetPublickeyFromXY(new BigInteger(x, 16), new BigInteger(y, 16));
String content = "1234泰酷拉NET";
Console.WriteLine("待处理字符串：" + content);
//Sm2Encrypt 对应 C1C3C2
// Sm2EncryptOld ：C1C2C3
byte[] digestByte = GmUtil.Sm2Encrypt(Encoding.UTF8.GetBytes(content), publicKey1);
string strSM2 = Hex.ToHexString(digestByte);
Console.WriteLine("SM2加密后：" + strSM2);
// 4. .NET BC库SM2加密结果会带04，如果JAVA 那边报 Invalid point encoding 错误，删除加密结果前的04。如果对方要的是BASE64的加密结果，我们可以先转16进制字符串，裁掉04，再转BASE64。
string newCipherText = Hex.ToHexString(digestByte);
if (newCipherText.StartsWith("04"))
{
newCipherText = newCipherText.Substring(2);
}
Console.WriteLine("截取04后，加密结果：" + newCipherText);
//.NET 自加自解
BigInteger d = new BigInteger(privateKeyHex, 16);
//先拿到私钥对象，用ECPrivateKeyParameters 或 AsymmetricKeyParameter 都可以
//ECPrivateKeyParameters bcecPrivateKey = CommonUtils.GmUtil.GetPrivatekeyFromD(d);
AsymmetricKeyParameter bcecPrivateKey = CommonUtils.GmUtil.GetPrivatekeyFromD(d);
byte[] byToDecrypt = Hex.Decode(strSM2);
byte[] byDecrypted = GmUtil.Sm2Decrypt(byToDecrypt, bcecPrivateKey);
String strDecrypted = Encoding.UTF8.GetString(byDecrypted);
Console.WriteLine("SM2解密后：" + strDecrypted);
//JAVA 结果，.NET来解
string javaSM2 = "04a7aaa9fd91aea6f99787ef431e19cb9feecc5bfb97fb445ce529c78c04676f1792e06b3a2814d1bda80bd3f63e530c149fc03911f1b81007dc86cef2c03f30c7fecc8b256272f881a8f2f4e71351c45d5bb27e8531f1e2ea6d55150c88f5026b8783ccef867a510a313178cfd26177";
//.NET BC库解密，密文前要加 “04”，否则会报 Invalid point encoding XX
//如果加密结果是BASE64的，把BASE64转16进制字符串，再判断是否04开头。
//如果对方源码，固定截取的头2位，那么就不用判断是否04开头了，直接写死：javaSM2 = "04" + javaSM2;
if (!javaSM2.StartsWith("04"))
{
javaSM2 = "04" + javaSM2;
}
Console.WriteLine("javaSM2加密结果：" + javaSM2);
byToDecrypt = Hex.Decode(javaSM2);
byDecrypted = GmUtil.Sm2Decrypt(byToDecrypt, bcecPrivateKey);
strDecrypted = Encoding.UTF8.GetString(byDecrypted);
Console.WriteLine("java SM2解密后：" + strDecrypted);
}
java代码：
maven 引用 ：
<dependency>
<groupId>cn.hutool</groupId>
<artifactId>hutool-all</artifactId>
<version>5.8.1</version>
</dependency>
<dependency>
<groupId>org.bouncycastle</groupId>
<artifactId>bcprov-jdk15on</artifactId>
<version>1.70</version>
</dependency>
JAVA调用：
package org.example;
import cn.hutool.crypto.SmUtil;
import cn.hutool.crypto.asymmetric.KeyType;
import cn.hutool.crypto.asymmetric.SM2;
import org.bouncycastle.crypto.engines.SM2Engine;
import org.bouncycastle.util.encoders.Hex;
static void testSM2Enc() {
//sm2 加密模式:C1C3C2
//私钥
String privateKeyHex = "FAB8BBE670FAE338C9E9382B9FB6485225C11A3ECB84C938F10F20A93B6215F0";
//完整公钥“9EF573019D9A03B16B0BE44FC8A5B4E8E098F56034C97B312282DD0B4810AFC3CC759673ED0FC9B9DC7E6FA38F0E2B121E02654BF37EA6B63FAF2A0D6013EADF”
//公钥X
String x = "9EF573019D9A03B16B0BE44FC8A5B4E8E098F56034C97B312282DD0B4810AFC3";
//公钥Y
String y = "CC759673ED0FC9B9DC7E6FA38F0E2B121E02654BF37EA6B63FAF2A0D6013EADF";
String content = "1234泰酷拉JJ";
System.out.println("待处理字符串：" + content);
SM2 sm2 = new SM2(privateKeyHex, x, y);
//默认是:C1C3C2
sm2.setMode(SM2Engine.Mode.C1C3C2);
//公钥加密
byte[] byRst = sm2.encrypt(content.getBytes(), KeyType.PublicKey);
String strRst = Hex.toHexString(byRst);
System.out.println("加密后：" + strRst);
byte[] byToDecrypt = Hex.decode(strRst);
byte[] byDecrypted = sm2.decrypt(byToDecrypt, KeyType.PrivateKey);
String strDecrypted = new String(byDecrypted);
System.out.println("解密后：" + strDecrypted);
}
end.
