PHP与asp.net C#可共用的可逆加密算法

发布:smiling　来源: PHP粉丝网　添加日期：2014-08-27 16:36:08　浏览: 评论：0　

因为工作需我们需要在php中生成加密然后在asp.net中接受过来的密码再解密,下面我找到一个PHP与asp.net C#可共用的可逆加密算法,有需要了解的同学可参考.

php加密算法,代码如下:

<?php

class DES

{

    var $key;

    var $iv; //偏移量



    function DES($key = '11001100', $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} );

        //开源代码phpfensi.com

        if ($pad > strlen ( $text ))

            return false;

        if (strspn ( $text, chr ( $pad ), strlen ( $text ) - $pad ) != $pad)

            return false;

        return substr ( $text, 0, - 1 * $pad );

    }



}

?>

asp.net程序代码,代码如下:

using System;

using System.Collections.Generic;

using System.IO;

using System.Linq;

using System.Security.Cryptography;

using System.Text;

namespace WindowsFormsApplication1

{

    /// <summary>

    /// DES加密解密字符串

    /// </summary>

    public class DesEncryption

    {

        /// <summary>

        /// DES加密字符串

        /// </summary>

        /// <param name="encryptString">待加密的字符串</param>

        /// <param name="encryptKey">加密密钥,要求为8位</param>

        /// <returns>加密成功返回加密后的字符串，失败返回null</returns>

        public static string EncryptDES(string encryptString, string encryptKey = "11001100")

        {

            try

            {

                byte[] rgbKey = ASCIIEncoding.ASCII.GetBytes(encryptKey.Substring(0, 8));

                byte[] rgbIV = rgbKey;

                byte[] inputByteArray = Encoding.UTF8.GetBytes(encryptString);

                DESCryptoServiceProvider dCSP = new DESCryptoServiceProvider();

                MemoryStream mStream = new MemoryStream();

                CryptoStream cStream = new CryptoStream(mStream, dCSP.CreateEncryptor(rgbKey, rgbIV), CryptoStreamMode.Write);

                cStream.Write(inputByteArray, 0, inputByteArray.Length);

                cStream.FlushFinalBlock();

                StringBuilder ret = new StringBuilder();

                foreach (byte b in mStream.ToArray())

                {

                    ret.AppendFormat("{0:X2}", b);

                }

                ret.ToString();

                return ret.ToString();

            }

            catch

            {

                return null;

            }

        }

        /// <summary>

        /// DES解密字符串

        /// </summary>

        /// <param name="decryptString">待解密的字符串</param>

        /// <param name="decryptKey">解密密钥,要求为8位,和加密密钥相同</param>

        /// <returns>解密成功返回解密后的字符串，失败返回null</returns>

        public static string DecryptDES(string decryptString, string decryptKey = "11001100")

        {

            try

            {

                byte[] rgbKey = ASCIIEncoding.ASCII.GetBytes(decryptKey);

                byte[] rgbIV = rgbKey;

                byte[] inputByteArray = new byte[decryptString.Length / 2];

                for (int x = 0; x < decryptString.Length / 2; x++)

                {

                    int i = (Convert.ToInt32(decryptString.Substring(x * 2, 2), 16));

                    inputByteArray[x] = (byte)i;

                }

                DESCryptoServiceProvider DCSP = new DESCryptoServiceProvider();

                MemoryStream mStream = new MemoryStream();

                CryptoStream cStream = new CryptoStream(mStream, DCSP.CreateDecryptor(rgbKey, rgbIV), CryptoStreamMode.Write);

                cStream.Write(inputByteArray, 0, inputByteArray.Length);

                cStream.FlushFinalBlock();

                return Encoding.UTF8.GetString(mStream.ToArray());

            }

            catch

            {

                return null;

            }

        }

    }

}