自己封装的加密cookie相关函数

使用mcrypt对cookie值进行可逆加密，浏览器端存储的是加密过得值，可以当session用





//配置部分

$config['cookie_prefix'] = 'bccn_';

$config['cookie_domain'] = 'bccn.net';

$config['cookie_path'] = '/';

$config['cookie_skey'] = 'jewhdfy234957632946w32trweyugtfrhsdgfa';

 

//实现函数部分

function set_cookie($key, $value, $expire=2400, $secure=false, $httponly=true){

    global $config;

    $key = $config['cookie_prefix'] . $key;

    $value = encrypt($value, $config['cookie_skey']);

    setcookie($key, $value, time()+$expire, $config['cookie_path'], $config['cookie_domain'], $secure, $httponly);

}

 

function get_cookie($key){

    global $config;

    $key = $config['cookie_prefix'] . $key;

    if(array_key_exists($key, $_COOKIE)){

        return decrypt($_COOKIE[$key], $config['cookie_skey']);

    }else{

        return '';

    }

}

 

function del_cookie($key){

    global $config;

    $key = $config['cookie_prefix'] . $key;

    if(array_key_exists($key, $_COOKIE)){

        setcookie($key, '', time()-3600, $config['cookie_path'], $config['cookie_domain'], false, false);

    }

}

 

//加密解密函数

function encrypt($str, $skey){

    $skey = substr($skey, 0, 56);

    $td = mcrypt_module_open('blowfish-compat', '', 'ecb', '');

    $iv = mcrypt_create_iv (mcrypt_enc_get_iv_size($td), MCRYPT_RAND);

    mcrypt_generic_init($td, $skey, $iv);

    $encrypted_str = mcrypt_generic($td, $str);

    mcrypt_generic_deinit($td);

    mcrypt_module_close($td);

    $encrypted_str = bin2hex($encrypted_str);

    return $encrypted_str;

}

 

function decrypt($str, $skey){

    $str = hex2bin($str);

    $skey = substr($skey, 0, 56);

    $td = mcrypt_module_open('blowfish-compat', '', 'ecb', '');

    $iv = mcrypt_create_iv (mcrypt_enc_get_iv_size($td), MCRYPT_RAND);

    mcrypt_generic_init($td, $skey, $iv);

    $decrypted_str = mdecrypt_generic($td, $str);

    mcrypt_generic_deinit($td);

    mcrypt_module_close($td);

    return $decrypted_str;

}

 

//测试

set_cookie('test', 'hello world! 哈哈');

//del_cookie('test');

echo get_cookie('test');