SM加密、解密(类库以及demo)

C#语言基础

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开发语言：C#
实例大小：0.02M
下载次数：33
浏览次数：386
发布时间：2019-11-19
实例类别：C#语言基础
发布人：zkp
文件格式：.zip
所需积分：2

实例介绍

【实例简介】SM加密

【实例截图】

using System;
 
namespace smcrypto
{
    class Program
    {
        static void Main(string[] args)
        {
            SM4Utils sm4 = new SM4Utils();
            sm4.secretKey = "JeF8U9wHFOMfs2Y8";
            sm4.hexString = false;
 
            Console.WriteLine("ECB模式");
            Console.WriteLine("密文: "   sm4.Encrypt_ECB("11223344556677881122334455667788".HexToByteArray(), "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF".HexToByteArray()).ByteArrayToHex());
            Console.WriteLine("");
 
            Console.ReadLine();
        }
    }
}

【核心代码】

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Org.BouncyCastle.Math;
using Org.BouncyCastle.Math.EC;
using Org.BouncyCastle.Crypto;
using Org.BouncyCastle.Crypto.Parameters;
using Org.BouncyCastle.Crypto.Digests;

namespace ConsoleApplication1
{
public class Cipher
{
private int ct = 1;

private ECPoint p2;
private SM3Digest sm3keybase;
private SM3Digest sm3c3;

private byte[] key = new byte[32];
private byte keyOff = 0;

public Cipher()
{
}

private void Reset()
{
sm3keybase = new SM3Digest();
sm3c3 = new SM3Digest();

byte[] p;

//p = p2.X.ToBigInteger().ToByteArray();
p = p2.X.ToBigInteger().ToByteArray();
sm3keybase.BlockUpdate(p, 0, p.Length);
sm3c3.BlockUpdate(p, 0, p.Length);

p = p2.Y.ToBigInteger().ToByteArray();
//p = p2.Y.ToBigInteger().ToByteArray();
sm3keybase.BlockUpdate(p, 0, p.Length);

ct = 1;
NextKey();
}

private void NextKey()
{
SM3Digest sm3keycur = new SM3Digest(sm3keybase);
sm3keycur.Update((byte)(ct >> 24 & 0x00ff));
sm3keycur.Update((byte)(ct >> 16 & 0x00ff));
sm3keycur.Update((byte)(ct >> 8 & 0x00ff));
sm3keycur.Update((byte)(ct & 0x00ff));
sm3keycur.DoFinal(key, 0);
keyOff = 0;
ct ;
}

public virtual ECPoint Init_enc(SM2 sm2, ECPoint userKey)
{
BigInteger k = null;
ECPoint c1 = null;

AsymmetricCipherKeyPair key = sm2.ecc_key_pair_generator.GenerateKeyPair();
ECPrivateKeyParameters ecpriv = (ECPrivateKeyParameters)key.Private;
ECPublicKeyParameters ecpub = (ECPublicKeyParameters)key.Public;
k = ecpriv.D;
c1 = ecpub.Q;

p2 = userKey.Multiply(k);
Reset();

return c1;
}

public virtual void Encrypt(byte[] data)
{
sm3c3.BlockUpdate(data, 0, data.Length);
for (int i = 0; i < data.Length; i )
{
if (keyOff == key.Length)
NextKey();

data[i] ^= key[keyOff ];
}
}

public virtual void Init_dec(BigInteger userD, ECPoint c1)
{
p2 = c1.Multiply(userD);
Reset();
}

public virtual void Decrypt(byte[] data)
{
for (int i = 0; i < data.Length; i )
{
if (keyOff == key.Length)
NextKey();

data[i] ^= key[keyOff ];
}
sm3c3.BlockUpdate(data, 0, data.Length);
}

public virtual void Dofinal(byte[] c3)
{
byte[] p = p2.Y.ToBigInteger().ToByteArray();
//byte[] p = p2.Y.ToBigInteger().ToByteArray();
sm3c3.BlockUpdate(p, 0, p.Length);
sm3c3.DoFinal(c3, 0);
Reset();
}
}
}

标签： 加密

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