/**
* 计算hash值，在数据量不大时使用，数据量大应使用原生接口，分段计算sm3值
* @param srcData 待计算hash值的数据
* @return
*/
public static byte[] Hash(byte[] srcData)
{
SM3Digest digest = new SM3Digest();
digest.BlockUpdate(srcData, 0, srcData.Length);
byte[] hash = new byte[digest.GetDigestSize()];
digest.DoFinal(hash, 0);
return(hash);
}
/// <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);
}
public override void PerformTest()
{
base.PerformTest();
SM3Digest dig = new SM3Digest();
byte[] resBuf = new byte[dig.GetDigestSize()];
VectorTest(dig, 10, resBuf, Hex.Decode(hexMessages[0]), Hex.Decode(digests[messages.Length]));
VectorTest(dig, 11, resBuf, Hex.Decode(hexMessages[1]), Hex.Decode(digests[messages.Length + 1]));
VectorTest(dig, 12, resBuf, Hex.Decode(hexMessages[2]), Hex.Decode(digests[messages.Length + 2]));
VectorTest(dig, 13, resBuf, Hex.Decode(hexMessages[3]), Hex.Decode(digests[messages.Length + 3]));
VectorTest(dig, 14, resBuf, Hex.Decode(hexMessages[4]), Hex.Decode(digests[messages.Length + 4]));
VectorTest(dig, 15, resBuf, Hex.Decode(hexMessages[5]), Hex.Decode(digests[messages.Length + 5]));
VectorTest(dig, 16, resBuf, Hex.Decode(hexMessages[6]), Hex.Decode(digests[messages.Length + 6]));
VectorTest(dig, 17, resBuf, Hex.Decode(hexMessages[7]), Hex.Decode(digests[messages.Length + 7]));
sixtyFourKTest(sixtyFourKdigest);
millionATest(million_a_digest);
}
public virtual byte[] Sm2GetZ(byte[] userId, ECPoint userKey)
{
SM3Digest sm3 = new SM3Digest();
byte[] p;
// userId length
int len = userId.Length * 8;
sm3.Update((byte)(len >> 8 & 0x00ff));
sm3.Update((byte)(len & 0x00ff));
// userId
sm3.BlockUpdate(userId, 0, userId.Length);
// a,b
p = ecc_a.ToByteArray();
sm3.BlockUpdate(p, 0, p.Length);
p = ecc_b.ToByteArray();
sm3.BlockUpdate(p, 0, p.Length);
// gx,gy
p = ecc_gx.ToByteArray();
sm3.BlockUpdate(p, 0, p.Length);
p = ecc_gy.ToByteArray();
sm3.BlockUpdate(p, 0, p.Length);
// x,y
p = userKey.AffineXCoord.ToBigInteger().ToByteArray();
sm3.BlockUpdate(p, 0, p.Length);
p = userKey.AffineYCoord.ToBigInteger().ToByteArray();
sm3.BlockUpdate(p, 0, p.Length);
// Z
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);
}
public override void Initialize()
{
HashValue = new byte[_digest.GetDigestSize()];
}