C#.NET 国密数字信封民生银行

民生银行的库DLL只有C版本和JAVA版本。按着JAVA版本做的C# 实现。

重点内容。

1。数字信封就是 CmsEnvelopedData Der编码后转BASE64

2。重点类：ContentInfo、EnvelopedData、EncryptedContentInfo、RecipientInfo。

3。随机生成 SM4 key和IV，都是16位。其中：SM4 key 使用SM2加密后，放入RecipientInfo。

4。IV 使用 DerOctetString 编码后，使用 AlgorithmIdentifier 携带。

5。把待加密数据用SM4 CBC 加密，Ber编码后放入 EncryptedContentInfo。

6。CmsEnvelopedData 包含 ContentInfo、EnvelopedData、EncryptedContentInfo、RecipientInfo。

7。SM2加密后，密文会是 04 开头，要去掉后传给JAVA（民生）。

实现：

nuget 下载 BouncyCastle，1.8.9 版本。

GmUtil：

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;
using System.Text;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); //c1Buffer.BlockCopy(c1c2c3, c1c2c3.Length - c3Len, result, c1Len, c3Len); //c3Buffer.BlockCopy(c1c2c3, c1Len, result, c1Len + c3Len, c1c2c3.Length - c1Len - c3Len); //c2return 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->65Buffer.BlockCopy(c1c3c2, c1Len + c3Len, result, c1Len, c1c3c2.Length - c1Len - c3Len); //c2Buffer.BlockCopy(c1c3c2, c1Len, result, c1c3c2.Length - c3Len, c3Len); //c3return 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<=32byte[] 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.NamefileStream = 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 static AsymmetricKeyParameter GetPublickeyFromX509String(string publicKeyCert){//还原完整文本格式publicKeyCert = StrToPubCert(publicKeyCert);byte[] bytesCerContent = System.Text.Encoding.UTF8.GetBytes(publicKeyCert);//需要完整文本格式才能解析X509Certificate certificate = new X509CertificateParser().ReadCertificate(bytesCerContent);return certificate.GetPublicKey();}/// <summary>/// 转为完整格式/// </summary>/// <param name="pubKeyStr"></param>/// <returns></returns>public static string StrToPubCert(string publicKeyCert){//去除意外字符             publicKeyCert = publicKeyCert.Replace("-----BEGIN CERTIFICATE-----", "").Replace("-----END CERTIFICATE-----", "").Replace("\r", "").Replace("\n", "").Trim();//完整string rn = "\n";StringBuilder sbKey = new StringBuilder(publicKeyCert);int nKeyLen = sbKey.Length;      //sbKey为base64编码的公钥字符串  for (int i = 64; i < nKeyLen; i += 64){sbKey.Insert(i, rn);i++;}sbKey.Insert(0, "-----BEGIN CERTIFICATE-----" + rn);sbKey.Append(rn + "-----END CERTIFICATE-----" + rn);string all_key_str = sbKey.ToString();return all_key_str;}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);}elsebyteSource.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");//如果是 NoPadding, SM4 加密的数据（byte[] plain）得是16的倍数，且需要自己Paddingif (algo.Contains("NOPAD") && 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");//如果是 NoPadding, SM4 加密的数据（byte[] plain）得是16的倍数，且需要自己Paddingif (algo.Contains("NOPAD") && 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=1Asn1Sequence priSeq = (Asn1Sequence)asn1Sequence[1];//private keyAsn1Sequence 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: 9a7f77c578644050e09a9adc4245d1e6eba97554bc8ffd4fe15a78f37f891ff8AsymmetricKeyParameter 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 -> 681edf34d206965e86b3e94f536e4246byte[] 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)));}}
}

国密数字信封加密：

using CommonUtils;
using Org.BouncyCastle.Asn1;
using Org.BouncyCastle.Asn1.Cms;
using Org.BouncyCastle.Asn1.X509;
using Org.BouncyCastle.Cms;
using Org.BouncyCastle.Crypto;
using Org.BouncyCastle.Math;
using Org.BouncyCastle.Utilities.Encoders;
using System;
using System.IO;
using System.Text;namespace Console民生银行国密数字信封
{internal class Program{static void Main(string[] args){try{//国密公钥证书string txtIsvPubCert = "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";//国密私钥证书string gmPrivateKeyCert = @"MIIDHwIBATBHBgoqgRzPVQYBBAIBBgcqgRzPVQFoBDBgkpL4SzxKcmNmrzvEtrl5lncqsy/fvW/6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";//国密私钥证书密码string gmPrivateKeyCertPwd = "123abc";string inputStr = "oh yeah 123。";Console.WriteLine("数字信封-待加密数据:" + inputStr);var aa = CmsEncrypt(inputStr, txtIsvPubCert);Console.WriteLine("数字信封-加密数据:" + aa);//测试JAVA程序加密结果//  aa = "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";                // Console.WriteLine("数字信封-加密数据:" + aa);var bb = CmsDecrypt(aa, gmPrivateKeyCert, gmPrivateKeyCertPwd);Console.WriteLine("数字信封-解密数据:" + bb);}catch (Exception ex){Console.WriteLine("ex:" + ex.Message);}Console.ReadKey();}/// <summary>/// 数字信封-加密/// </summary>static string CmsEncrypt(string inputStr, string pubkeyCert){//SM2,SM4 加密数据从 string 转 byte  数组时，使用UTF8。Encoding enc = Encoding.UTF8;//调试时可以写死KEY和IV//string sm4key = "1234567890123456";//string sm4iv = "1234567890123456";//随机生成KEY和IV，都是16字符长度string sm4key = Guid.NewGuid().ToString("N").Substring(0, 16);string sm4iv = Guid.NewGuid().ToString("N").Substring(0, 16);//如果是 NoPadding, SM4 加密的数据（byte[] plain）得是16的倍数string algo = "SM4/CBC/PKCS7Padding";byte[] keyBytes = Encoding.UTF8.GetBytes(sm4key);byte[] ivBytes = Encoding.UTF8.GetBytes(sm4iv);#region 使用SM2加密SM4 KEYAsymmetricKeyParameter bankPubCert2 = GmUtil.GetPublickeyFromX509String(pubkeyCert);byte[] bytencryptedData = enc.GetBytes(sm4key);byte[] bysm4keyEncrypted = GmUtil.Sm2EncryptOld(bytencryptedData, bankPubCert2);//使用SM2加密SM4 KEY//BC库SM2加密结果会带04，删除加密结果前的04，否则JAVA（民生银行） 那边解密不了。Invalid point encodingstring newCipherText = Hex.ToHexString(bysm4keyEncrypted);if (newCipherText.StartsWith("04")){newCipherText = newCipherText.Substring(2);}bysm4keyEncrypted = Hex.Decode(newCipherText);// 主题密钥标识符 (SKI)。 JAVA BC 库写法：SubjectKeyIdentifier sid = cert.getSubjectKeyIdentifier();             SubjectKeyIdentifier sid = new Org.BouncyCastle.X509.Extension.SubjectKeyIdentifierStructure(bankPubCert2);#endregionAsn1OctetString encKey = new DerOctetString(bysm4keyEncrypted);AlgorithmIdentifier keyEncAlg = new AlgorithmIdentifier(new DerObjectIdentifier("1.2.156.10197.1.301.3")); //sm2  公钥加密算法IDKeyTransRecipientInfo ktr = new KeyTransRecipientInfo(new RecipientIdentifier(new DerOctetString(sid.GetKeyIdentifier())), keyEncAlg, encKey);RecipientInfo ri = new RecipientInfo(ktr); //SM4 key 使用SM2加密后，放入RecipientInfo。byte[] sourceData = enc.GetBytes(inputStr);byte[] encryptedData = GmUtil.Sm4EncryptCBC(keyBytes, sourceData, ivBytes, algo); ;//待SM4 加密，加密后的数据DerObjectIdentifier sm2DataID = new DerObjectIdentifier("1.2.156.10197.6.1.4.2.1");//SM2数据类型data IDDerOctetString doct = new DerOctetString(ivBytes);DerObjectIdentifier tOID = new DerObjectIdentifier("1.2.156.10197.1.104"); // SM4_CBC ,ID AlgorithmIdentifier contentEncryptionAlgId = new AlgorithmIdentifier(tOID, doct);//用 AlgorithmIdentifier携带 IV 数据Asn1EncodableVector recipientInfos = new Asn1EncodableVector();recipientInfos.Add(ri);//SM4 key 使用SM2加密后，放入RecipientInfo。Asn1Set aSet1 = null;Asn1OctetString encryptOctet = new BerOctetString(encryptedData);//SM4加密后的数据EncryptedContentInfo eci = new EncryptedContentInfo(sm2DataID, contentEncryptionAlgId, encryptOctet);// SM4-IV 和 SM4加密后的数据EnvelopedData enData = new EnvelopedData(null, new DerSet(recipientInfos), eci, aSet1);// SM4-KEY,SM4-IV 和 SM4加密后的数据DerObjectIdentifier sm2EnvelopedDataID = new DerObjectIdentifier("1.2.156.10197.6.1.4.2.3");//数字信封数据类型envelopedData IDContentInfo contentInfo = new ContentInfo(sm2EnvelopedDataID, enData);string base64CmsEncryptData = string.Empty;using (MemoryStream bos = new MemoryStream()){using (DerOutputStream dos = new DerOutputStream(bos)){dos.WriteObject((new CmsEnvelopedData(contentInfo)).ContentInfo);byte[] byteArray = bos.ToArray();base64CmsEncryptData = Convert.ToBase64String(byteArray);}}return base64CmsEncryptData;}/// <summary>/// 数字信封-解密/// </summary>static string CmsDecrypt(string cmsEnvelopedData, string gmPrivateKeyCert, string gmPrivateKeyCertPwd){//获取私钥对象 AsymmetricKeyParameter privateKeyvar pemPrivateKey = Convert.FromBase64String(gmPrivateKeyCert);var tempPrivateKey = GmUtil.readSm2File(pemPrivateKey, gmPrivateKeyCertPwd);AsymmetricKeyParameter privateKey = tempPrivateKey.privateKey;byte[] bEnvelop = Convert.FromBase64String(cmsEnvelopedData);CmsEnvelopedData cmsEnData = new CmsEnvelopedData(bEnvelop);ContentInfo info = cmsEnData.ContentInfo;EnvelopedData enData = EnvelopedData.GetInstance(info.Content);Asn1Set receivers = enData.RecipientInfos;#region 使用SM2 私钥解密出SM4 KEY //没适配多receivers的情况，强取第1个RecipientInfo recipientInfo = RecipientInfo.GetInstance(receivers[0]);KeyTransRecipientInfo keyTransRecipientInfo = KeyTransRecipientInfo.GetInstance(recipientInfo.Info);Asn1OctetString encryptKey = keyTransRecipientInfo.EncryptedKey;AlgorithmIdentifier algId = keyTransRecipientInfo.KeyEncryptionAlgorithm;byte[] byEncryptKey = encryptKey.GetOctets();string hexEncryptKey = Hex.ToHexString(byEncryptKey);//BC库解密，密文前要加 “04”，否则会报 Invalid point encoding XXif (!hexEncryptKey.StartsWith("04")){hexEncryptKey = "04" + hexEncryptKey;}byEncryptKey = Hex.Decode(hexEncryptKey);byte[] symmetricKey = GmUtil.Sm2DecryptOld(byEncryptKey, privateKey);#endregion#region 拿到 SM4 IV//拿到 SM4 IVEncryptedContentInfo data = enData.EncryptedContentInfo;AlgorithmIdentifier symmetricAlgId = data.ContentEncryptionAlgorithm;DerOctetString doct = (DerOctetString)symmetricAlgId.Parameters;byte[] bySm4Iv = doct.GetOctets();#endregion//取出被SM4加密的数据string algo = "SM4/CBC/PKCS7Padding";byte[] encryptedBytes = data.EncryptedContent.GetOctets();byte[] sourceData = GmUtil.Sm4DecryptCBC(symmetricKey, encryptedBytes, bySm4Iv, algo);string sm4DecryptedStr = Encoding.UTF8.GetString(sourceData);//偷懒，写死了UTF8。return sm4DecryptedStr;}}
}

end

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