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PHP中的 Mcrypt 可逆加密算法

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2016-06-13 10:11:57840browse

PHP中的 Mcrypt 可逆加密算法

    $td = mcrypt_module_open(MCRYPT_DES,'','ecb',''); //使用MCRYPT_DES算法,ecb模式  

     $iv = mcrypt_create_iv(mcrypt_enc_get_iv_size($td), MCRYPT_RAND);  
    $ks = mcrypt_enc_get_key_size($td);  
  
    $key = "ery secret key";//密钥  
     $key = substr(md5($key), 0, $ks);  
  
    mcrypt_generic_init($td, $key, $iv); //初始处理  
  
    //加密  
    $encrypted = mcrypt_generic($td, 'This is very important data');  
  
    //结束处理  
    mcrypt_generic_deinit($td);  
  
    //初始解密处理  
    mcrypt_generic_init($td, $key, $iv);  
  
    //解密  
    $decrypted = mdecrypt_generic($td, $encrypted);  
  
    //结束  
    mcrypt_generic_deinit($td);  
  
    mcrypt_module_close($td);  
  
    //解密后,可能会有后续的,需去掉  
    echo trim($decrypted) . "n";  

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