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@GerBawn

GerBawn/mcrypt.php

Created September 23, 2015 01:32
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  1. GerBawn created this gist Sep 23, 2015.
    53 changes: 53 additions & 0 deletions mcrypt.php
    View file
    Original file line number Diff line number Diff line change
    @@ -0,0 +1,53 @@
    <?php
    /**
    * Created by PhpStorm.
    * User: tew
    * Date: 2015/9/23
    * Time: 9:32
    */
    class mcrypt{
    public static $key = '7fdc4b8e';
    public static function encode($text){
    $result = "";
    if(!empty($text)){
    $val = self::pad($text);
    $td = mcrypt_module_open(MCRYPT_DES,'',MCRYPT_MODE_ECB,''); //使用MCRYPT_DES算法,cbc模式
    $iv = mcrypt_create_iv(mcrypt_enc_get_iv_size($td), MCRYPT_RAND);
    mcrypt_generic_init($td,self::$key,$iv); //初始处理
    $encrypted = mcrypt_generic($td,$val); //解密
    mcrypt_generic_deinit($td); //结束
    mcrypt_module_close($td);
    $result = base64_encode($encrypted);
    }
    return $result;
    }

    public static function decode($encrypted){
    $result = "";
    if(!empty($encrypted)){
    $encrypted = base64_decode($encrypted);
    $td = mcrypt_module_open(MCRYPT_DES,'',MCRYPT_MODE_ECB,''); //使用MCRYPT_DES算法,cbc模式
    $iv = mcrypt_create_iv(mcrypt_enc_get_iv_size($td), MCRYPT_RAND);
    mcrypt_generic_init($td,self::$key,$iv); //初始处理
    $decrypted = mdecrypt_generic($td, $encrypted); //解密
    mcrypt_generic_deinit($td); //结束
    mcrypt_module_close($td);
    $result = self::unpad($decrypted);
    }
    return $result;
    }

    public static function pad($text,$block = 8){
    $pad = $block - (strlen($text) % $block);
    return $text . str_repeat(chr($pad), $pad);
    }

    public static function unpad($text){
    $pad = ord($text{strlen($text)-1});
    if ($pad > strlen($text))
    return $text;
    if (strspn($text, chr($pad), strlen($text) - $pad) != $pad)
    return $text;
    return substr($text, 0, -1 * $pad);
    }
    }