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php实现和c#一致的DES加密解密实例

2017年12月12日  | 移动技术网IT编程  | 我要评论

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移动技术网。

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