php实现和c#一致的DES加密解密

原文: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 );
	}

}
?>