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 asn1 format
*/
public static byte[] SignSm3WithSm2Asn1Rs(byte[] msg, byte[] userId, AsymmetricKeyParameter privateKey)
{
try
{
ISigner signer = SignerUtilities.GetSigner("SM3withSM2");
signer.Init(true, new ParametersWithID(privateKey, userId));
signer.BlockUpdate(msg, 0, msg.Length);
byte[] sig = signer.GenerateSignature();
return sig;
}
catch (Exception e)
{
//log.Error("SignSm3WithSm2Asn1Rs error: " + e.Message, e);
return null;
}
}
/**
*
* @param msg
* @param userId
* @param rs r||s,直接拼接byte数组的rs
* @param publicKey
* @return
*/
public static bool VerifySm3WithSm2(byte[] msg, byte[] userId, byte[] rs, AsymmetricKeyParameter publicKey)
{
if (rs == null || msg == null || userId == null) return false;
if (rs.Length != RS_LEN * 2) return false;
return VerifySm3WithSm2Asn1Rs(msg, userId, RsPlainByteArrayToAsn1(rs), publicKey);
}
/**
*
* @param msg
* @param userId
* @param rs in asn1 format
* @param publicKey
* @return
*/
public static bool VerifySm3WithSm2Asn1Rs(byte[] msg, byte[] userId, byte[] sign, AsymmetricKeyParameter publicKey)
{
try
{
ISigner signer = SignerUtilities.GetSigner("SM3withSM2");
signer.Init(false, new ParametersWithID(publicKey, userId));
signer.BlockUpdate(msg, 0, msg.Length);
return signer.VerifySignature(sign);
}
catch (Exception e)
{
//log.Error("VerifySm3WithSm2Asn1Rs error: " + e.Message, e);
return false;
}
}
/**
* bc加解密使用旧标c1||c2||c3,此方法在加密后调用,将结果转化为c1||c3||c2
* @param c1c2c3
* @return
*/
private static byte[] ChangeC1C2C3ToC1C3C2(byte[] c1c2c3)
{
int c1Len = (x9ECParameters.Curve.FieldSize + 7) / 8 * 2 + 1; //sm2p256v1的这个固定65。可看GMNamedCurves、ECCurve代码。
const int c3Len = 32; //new SM3Digest().getDigestSize();
byte[] result = new byte[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 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();
}
///
/// 转为完整格式
///
///
///
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 byteSource = new List();
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 byteSource = new List();
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");
//如果是 NoPadding, SM4 加密的数据(byte[] plain)得是16的倍数,且需要自己Padding
if (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Padding
if (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=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)));
}
}
}
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();
}
///
/// 数字信封-加密
///
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 KEY
AsymmetricKeyParameter 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 encoding
string 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);
#endregion
Asn1OctetString encKey = new DerOctetString(bysm4keyEncrypted);
AlgorithmIdentifier keyEncAlg = new AlgorithmIdentifier(new DerObjectIdentifier("1.2.156.10197.1.301.3")); //sm2 公钥加密算法ID
KeyTransRecipientInfo 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 ID
DerOctetString 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 ID
ContentInfo 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;
}
///
/// 数字信封-解密
///
static string CmsDecrypt(string cmsEnvelopedData, string gmPrivateKeyCert, string gmPrivateKeyCertPwd)
{
//获取私钥对象 AsymmetricKeyParameter privateKey
var 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 XX
if (!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 IV
EncryptedContentInfo 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