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@ 2017-07-10T11:24:32Z

<form action="" method="post">
    <input type="text" name="challenge">
    <input type="submit" value="Generuj!">
</form>

<?php

if(!empty($_POST['challenge'])){
    $challenge = $_POST['challenge'];


    $temp = "";
    for($x=0;$x<8;$x++){
        if(ord($challenge[$x]) <= 0x47){
            $temp[$x] = chr(ord($challenge[$x])<<1);
        }else{
            $temp[$x] = chr(ord($challenge[$x])>>1);
        }
    }


    $md5hash = hash('md5', implode('', $temp));
    for($y=0;$y<8;$y++){
        $byteHash[$y] = intval(substr($md5hash, $y*2, 2), 16);
    }


    $pass = "";
    for($z=0;$z<8;$z++){
        $tmp1 = ($byteHash[$z]>>1)*0xB60B60B7;
        $tmp1 = $tmp1>>(5+32);
        $tmp2 = $tmp1<<3;
        $tmp2 = $tmp2-($tmp1<<1);
        $tmp3 = $tmp2<<4;
        $tmp3 = $tmp3-$tmp2;
        $tmp4 = $byteHash[$z]-$tmp3+0x21;
        $tmp4 = $tmp4&0xFF;

        $pass .= (($tmp4 == 0x3F) ? chr(0x3E) : chr($tmp4));
    }

    echo 'Pass: </br>';
    echo $pass;
}
?>

Output for 5.6.38, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6: <form action="" method="post"> <input type="text" name="challenge"> <input type="submit" value="Generuj!"> </form>
Output for 8.3.5: Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 <form action="" method="post"> <input type="text" name="challenge"> <input type="submit" value="Generuj!"> </form>

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205.27 ms | 402 KiB | 245 Q