C# MD5加密 DES解密
场景：第三方需要直接通过账号登录我方平台
********安全方面的考虑，token值需要定期修改
MD5加密是不可逆的
通过get方式，模拟第三方传过来账号secret和token值
将第三方传过来的加密账号进行解密
<!--加密秘钥，加密账号后传给第三方，第三方得到加密后的账号--> <!--加密秘钥（加密解密都需要用到相同的秘钥）--> <add key ="secretKey" value="c44a471bd78cc6c2fea32b9fe028d30a"/> <!--传值秘钥匹配是否正确--> <add key="token" value="e10adc3949ba59abbe56e057f20f883e"/>
引用DES类
/// <summary>
/// 解密验证
/// </summary>
/// <param name="secret">0D8B79324852741C62A888CF95E99A98</param>
/// <param name="token">e10adc3949ba59abbe56e057f20f883e</param>
/// <returns></returns>
[AllowAnonymous]
public ActionResult DESCheck(string secret,string token)
{
//加密秘钥（加密解密都需要用到）
string secretKey = System.Web.Configuration.WebConfigurationManager.AppSettings["secretKey"];
//传值秘钥
string tokenCheck = System.Web.Configuration.WebConfigurationManager.AppSettings["token"];
//判断第三方传过来的token值与本地的tokenCheck值是否相等
if (token == tokenCheck)
{
TuserModel user = new TuserModel();
//解密账号
user.Fusername = DES.Decrypt(secret.Trim(), secretKey);
user.Fpassword = "ΩΨ";
Result<string> result = TUserBLL.ValidLogin(user);
if (result.Code == ResultCode.Success)
{
return RedirectToAction("Index");
}
else
{
return RedirectToAction("Error");
}
}
return RedirectToAction("Error");
}
[AllowAnonymous]
public ActionResult Error()
{
return View();
}
Error.cshtml错误页面
@{
Layout = null;
}
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width" />
<title>Error</title>
</head>
<body>
<div>
<h2>页面传值错误！</h2>
</div>
</body>
</html>
DES类
using System;
using System.Collections.Generic;
using System.Linq;
using System.Security.Cryptography;
using System.Text;
using System.Threading.Tasks;
namespace Esomy.Common
{
public class DES
{
/// <summary>
/// 加密数据
/// </summary>
/// <param name="Text"></param>
/// <param name="sKey"></param>
/// <returns></returns>
public static string Encrypt(string Text, string sKey)
{
DESCryptoServiceProvider des = new DESCryptoServiceProvider();
byte[] inputByteArray;
inputByteArray = Encoding.Default.GetBytes(Text);
des.Key = ASCIIEncoding.ASCII.GetBytes(System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(sKey, "md5").Substring(0, 8));
des.IV = ASCIIEncoding.ASCII.GetBytes(System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(sKey, "md5").Substring(0, 8));
System.IO.MemoryStream ms = new System.IO.MemoryStream();
CryptoStream cs = new CryptoStream(ms, des.CreateEncryptor(), CryptoStreamMode.Write);
cs.Write(inputByteArray, 0, inputByteArray.Length);
cs.FlushFinalBlock();
StringBuilder ret = new StringBuilder();
foreach (byte b in ms.ToArray())
{
ret.AppendFormat("{0:X2}", b);
}
return ret.ToString();
}
/// <summary>
/// 密码比较
/// </summary>
/// <param name="Text"></param>
/// <param name="sKey"></param>
/// <param name="ComparePwd"></param>
/// <returns></returns>
public static bool PwdCompare(string Text, string sKey, string ComparePwd)
{
string Qpwd = Encrypt(Text, sKey);
return ComparePwd == Qpwd;
}
/// <summary>
/// 解密数据
/// </summary>
/// <param name="Text"></param>
/// <param name="sKey"></param>
/// <returns></returns>
public static string Decrypt(string Text, string sKey)
{
DESCryptoServiceProvider des = new DESCryptoServiceProvider();
int len;
len = Text.Length / 2;
byte[] inputByteArray = new byte[len];
int x, i;
for (x = 0; x < len; x++)
{
i = Convert.ToInt32(Text.Substring(x * 2, 2), 16);
inputByteArray[x] = (byte)i;
}
des.Key = ASCIIEncoding.ASCII.GetBytes(System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(sKey, "md5").Substring(0, 8));
des.IV = ASCIIEncoding.ASCII.GetBytes(System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(sKey, "md5").Substring(0, 8));
System.IO.MemoryStream ms = new System.IO.MemoryStream();
CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(), CryptoStreamMode.Write);
cs.Write(inputByteArray, 0, inputByteArray.Length);
cs.FlushFinalBlock();
return Encoding.Default.GetString(ms.ToArray());
}
}
}
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转载请注明原文链接：c#DES解密
