本帖最后由 无心问世 于 2015-10-15 07:25 编辑
本来是发在我的博客的，看到论坛里有人问过这问题（http://www.52pojie.cn/thread-415365-1-1.html），就发过来了
原文地址：http://blog.lanyus.com/archives/25.html
遇到的网站是用的PantoSchool .net，在数据库中发现大量非明文密码R2AKd+aZ0K4=，百度发现是123，打算分析下算法，下面是分析后给出算法
[C#] 纯文本查看 复制代码 using System;
using System.IO;
using System.Security.Cryptography;
namespace DES
{
public class DECEncrypt
{
private byte[] arrDESIV;
private byte[] arrDESKey;
public DECEncrypt()
{
this.arrDESKey = new byte[] { 0x2a, 0x10, 0x5d, 0x9c, 0x4e, 4, 0xda, 0x20 };
this.arrDESIV = new byte[] { 0x37, 0x67, 0xf6, 0x4f, 0x24, 0x63, 0xa7, 3 };
}
public string Decrypt(string m_Need_Encode_String)
{
DESCryptoServiceProvider provider = new DESCryptoServiceProvider();
MemoryStream stream2 = new MemoryStream(Convert.FromBase64String(m_Need_Encode_String));
CryptoStream stream = new CryptoStream(stream2, provider.CreateDecryptor(this.arrDESKey, this.arrDESIV), CryptoStreamMode.Read);
StreamReader reader = new StreamReader(stream);
return reader.ReadToEnd();
}
public string Encrypt(string m_Need_Encode_String)
{
DESCryptoServiceProvider provider = new DESCryptoServiceProvider();
MemoryStream stream2 = new MemoryStream();
CryptoStream stream = new CryptoStream(stream2, provider.CreateEncryptor(this.arrDESKey, this.arrDESIV), CryptoStreamMode.Write);
StreamWriter writer = new StreamWriter(stream);
writer.Write(m_Need_Encode_String);
writer.Flush();
stream.FlushFinalBlock();
stream2.Flush();
return Convert.ToBase64String(stream2.GetBuffer(), 0, (int)stream2.Length);
}
}
class Program
{
static void Main(string[] args)
{
Console.WriteLine(new DECEncrypt().Encrypt("123"));
Console.ReadLine();
}
}
}
C#的代码，在vs2015调试通过，加密和解密方法，以及用到的key和iv都给了
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发表于 2015-10-15 07:23
