PHP实现和c#一致的DES加密解密，可以从网上搜到一大堆，但是测试后发现都没法用。以下正确代码是我经过苦苦才找到的。希望大家在系统整合时能用的上。

注意：key的长度为8位以内。

//C# 版DES 加解密算法 using System;   using System.Data;   using System.Configuration;   using System.Web;   using System.Web.Security;   using System.Web.UI;   using System.Web.UI.WebControls;   using System.Web.UI.WebControls.WebParts;   using System.Web.UI.HtmlControls;   using System.Data.SqlClient;   using System.Security.Cryptography;   using System.IO;   using System.Text;   public class Des{     //加解密密钥   private static string skey = "12345678";   //初始化向量   private static byte[] DESIV = { 0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF };            #region DESEnCode DES加密           public static string DESEnCode(string pToEncrypt, string sKey)           {             pToEncrypt = HttpContext.Current.Server.UrlEncode(pToEncrypt);             DESCryptoServiceProvider des = new DESCryptoServiceProvider();             byte[] inputByteArray = Encoding.GetEncoding("UTF-8").GetBytes(pToEncrypt);                      //建立加密对象的密钥和偏移量             //原文使用ASCIIEncoding.ASCII方法的GetBytes方法             //使得输入密码必须输入英文文本             des.Key = ASCIIEncoding.ASCII.GetBytes(sKey);             des.IV = ASCIIEncoding.ASCII.GetBytes(sKey);             MemoryStream ms = new 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);             }             ret.ToString();             return ret.ToString();           }          #endregion          /// <summary>         ///          /// </summary>         /// <param name="pToDecrypt"> 待解密的字符串</param>         /// <param name="sKey"> 解密密钥,要求为8字节,和加密密钥相同</param>         /// <returns>解密成功返回解密后的字符串，失败返源串</returns>         #region DESDeCode DES解密         public static string DESDeCode(string pToDecrypt, string sKey)         {           //  HttpContext.Current.Response.Write(pToDecrypt + "<br>" + sKey);             //  HttpContext.Current.Response.End();             DESCryptoServiceProvider des = new DESCryptoServiceProvider();                   byte[] inputByteArray = new byte[pToDecrypt.Length / 2];           for (int x = 0; x < pToDecrypt.Length / 2; x++)           {             int i = (Convert.ToInt32(pToDecrypt.Substring(x * 2, 2), 16));             inputByteArray[x] = (byte)i;           }                   des.Key = ASCIIEncoding.ASCII.GetBytes(sKey);           des.IV = ASCIIEncoding.ASCII.GetBytes(sKey);           MemoryStream ms = new MemoryStream();           CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(), CryptoStreamMode.Write);           cs.Write(inputByteArray, 0, inputByteArray.Length);           cs.FlushFinalBlock();                   StringBuilder ret = new StringBuilder();                   return HttpContext.Current.Server.UrlDecode(System.Text.Encoding.Default.GetString(ms.ToArray()));         }   #endregion  }  

<?php class DES {   var $key;   var $iv; //偏移量      function DES( $key, $iv=0 ) {   //key长度8例如:1234abcd     $this->key = $key;     if( $iv == 0 ) {       $this->iv = $key; //默认以$key 作为 iv     } else {       $this->iv = $iv; //mcrypt_create_iv ( mcrypt_get_block_size (MCRYPT_DES, MCRYPT_MODE_CBC), MCRYPT_DEV_RANDOM );     }   }      function encrypt($str) {   //加密，返回大写十六进制字符串     $size = mcrypt_get_block_size ( MCRYPT_DES, MCRYPT_MODE_CBC );     $str = $this->pkcs5Pad ( $str, $size );     return strtoupper( bin2hex( mcrypt_cbc(MCRYPT_DES, $this->key, $str, MCRYPT_ENCRYPT, $this->iv ) ) );   }      function decrypt($str) {   //解密     $strBin = $this->hex2bin( strtolower( $str ) );     $str = mcrypt_cbc( MCRYPT_DES, $this->key, $strBin, MCRYPT_DECRYPT, $this->iv );     $str = $this->pkcs5Unpad( $str );     return $str;   }      function hex2bin($hexData) {     $binData = "";     for($i = 0; $i < strlen ( $hexData ); $i += 2) {       $binData .= chr ( hexdec ( substr ( $hexData, $i, 2 ) ) );     }     return $binData;   }    function pkcs5Pad($text, $blocksize) {     $pad = $blocksize - (strlen ( $text ) % $blocksize);     return $text . str_repeat ( chr ( $pad ), $pad );   }      function pkcs5Unpad($text) {     $pad = ord ( $text {strlen ( $text ) - 1} );     if ($pad > strlen ( $text ))       return false;     if (strspn ( $text, chr ( $pad ), strlen ( $text ) - $pad ) != $pad)       return false;     return substr ( $text, 0, - 1 * $pad );   }    } ?> 

以上这篇php实现和c#一致的DES加密解密实例就是小编分享给大家的全部内容了，希望能给大家一个参考，也希望大家多多支持网页设计。