php实现和c#一致的DES加密解密

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 );  
        }  
          
    }  
    ?>