identify.class.php<======>token加密方法

class Identify
{
    static private $cert = "1111111";

    static public function writeSecret($mobile)
    {
        $content = rand(100, 999);
        $enc = self::amome_encrypt($content);
//$tmp = "./script/doMsg.sh 600 ".$enc." ".$mobile.".cert & ";   //echo "$2" > "/tmp/$3"  && sleep "$1" && rm "/tmp/$3"
//fclose(fopen($tmp, 'r'));
        $fop = fopen('aa', 'w');
        $fwr = fwrite($fop, $enc);
        $fcl = fclose($fop);
        return "$content";
    }

    static public function readSecret($mobile)
    {
        $tmp = "/tmp/" . $mobile . ".cert";
        if (is_file($tmp)) {
            if (filesize($tmp) == 33) {
                $fp = fopen($tmp, "r");
                $contents = fread($fp, 32);
                fclose($fp);
                if (strlen($contents) == 32) {
                    return $contents;
                }
            }
        }
        return false;
    }

    static public function amome_encrypt($rand)
    {
        return (sha1($rand . self::$cert));
    }
}