/// <summary>
/// 椭圆曲线参数P
/// </summary>
public readonly BigInteger EccP;
/// <summary>
/// 椭圆曲线参数A
/// </summary>
public readonly BigInteger EccA;
/// <summary>
/// 椭圆曲线参数B
/// </summary>
public readonly BigInteger EccB;
/// <summary>
/// 椭圆曲线参数N
/// </summary>
public readonly BigInteger EccN;
/// <summary>
/// 椭圆曲线参数Gx
/// </summary>
public readonly BigInteger EccGx;
/// <summary>
/// 椭圆曲线参数Gy
/// </summary>
public readonly BigInteger EccGy;
#endregion
/// <summary>
/// 椭圆曲线
/// </summary>
public readonly ECCurve EccCurve;
/// <summary>
/// 椭圆曲线的点G
/// </summary>
public readonly ECPoint EccPointG;
/// <summary>
/// 椭圆曲线 bc规范
/// </summary>
public readonly ECDomainParameters EccBcSpec;
/// <summary>
/// 椭圆曲线密钥对生成器
/// </summary>
public readonly ECKeyPairGenerator EccKeyPairGenerator;
private SM2()
{
EccParam = CurveParameter;
EccP = new BigInteger(EccParam[0], 16);
EccA = new BigInteger(EccParam[1], 16);
EccB = new BigInteger(EccParam[2], 16);
EccN = new BigInteger(EccParam[3], 16);
EccGx = new BigInteger(EccParam[4], 16);
EccGy = new BigInteger(EccParam[5], 16);
ECFieldElement ecc_gx_fieldelement = new FpFieldElement(EccP, EccGx);
ECFieldElement ecc_gy_fieldelement = new FpFieldElement(EccP, EccGy);
EccCurve = new FpCurve(EccP, EccA, EccB);
EccPointG = new FpPoint(EccCurve, ecc_gx_fieldelement, ecc_gy_fieldelement);
EccBcSpec = new ECDomainParameters(EccCurve, EccPointG, EccN);
ECKeyGenerationParameters ecc_ecgenparam;
ecc_ecgenparam = new ECKeyGenerationParameters(EccBcSpec, new SecureRandom());
EccKeyPairGenerator = new ECKeyPairGenerator();
EccKeyPairGenerator.Init(ecc_ecgenparam);
}
/// <summary>
/// 获取杂凑值H
/// </summary>
/// <param name="z">Z值</param>
/// <param name="data">待签名消息</param>
/// <returns></returns>
public virtual byte[] Sm2GetH(byte[] z, byte[] data)
{
SM3Digest sm3 = new SM3Digest();
//Z
sm3.BlockUpdate(z, 0, z.Length);
//待签名消息
sm3.BlockUpdate(data, 0, data.Length);
// H
byte[] md = new byte[sm3.GetDigestSize()];
sm3.DoFinal(md, 0);
return md;
}
/// <summary>
/// 获取Z值
/// Z=SM3(ENTL∣∣userId∣∣a∣∣b∣∣gx∣∣gy ∣∣x∣∣y)
/// </summary>
/// <param name="userId">签名方的用户身份标识</param>
/// <param name="userKey">签名方公钥</param>
/// <returns></returns>
public virtual byte[] Sm2GetZ(byte[] userId, ECPoint userKey)
{
SM3Digest sm3 = new SM3Digest();
byte[] p;
// ENTL由2个字节标识的ID的比特长度
int len = userId.Length * 8;
sm3.Update((byte)(len >> 8 & 0x00ff));
sm3.Update((byte)(len & 0x00ff));
// userId用户身份标识ID
sm3.BlockUpdate(userId, 0, userId.Length);
// a,b为系统曲线参数；
p = EccA.ToByteArray();
sm3.BlockUpdate(p, 0, p.Length);
p = EccB.ToByteArray();
sm3.BlockUpdate(p, 0, p.Length);
// gx、gy为基点
p = EccGx.ToByteArray();
sm3.BlockUpdate(p, 0, p.Length);
p = EccGy.ToByteArray();
sm3.BlockUpdate(p, 0, p.Length);
// x,y用户的公钥的X和Y
p = userKey.Normalize().XCoord.ToBigInteger().ToByteArray();
sm3.BlockUpdate(p, 0, p.Length);
p = userKey.Normalize().YCoord.ToBigInteger().ToByteArray();
sm3.BlockUpdate(p, 0, p.Length);
// Z
byte[] md = new byte[sm3.GetDigestSize()];
sm3.DoFinal(md, 0);
return md;
}
}
}
3 加密调用
using Org.BouncyCastle.Crypto;
using Org.BouncyCastle.Crypto.Parameters;
using Org.BouncyCastle.Math;
using Org.BouncyCastle.Math.EC;
using Org.BouncyCastle.Utilities.Encoders;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace Core.Common
{
/// <summary>
/// Sm2算法
/// 对标国际RSA算法
/// </summary>
public class Sm2Crypto
{
/// <summary>
/// 数据
/// </summary>
public string Str { get; set; }
/// <summary>
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