这篇文章主要介绍了关于php实现和c#一致的des加密解密实例，有着一定的参考价值，现在分享给大家，有需要的朋友可以参考一下
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 );
}
}
?>
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以上就是php实现和c#一致的des加密解密实例的详细内容。