phpbb_hash e login esterno al forum

Ciao a tutti ho fatto uno script per il login esterno al forum. Con phpbb_hash() cripto la password immessa dall'utente e la confronto con quella nel DB. Vi posto 2/3 codici per farvi capire.

phpbb.php

<?php
 
function phpbb_hash($password)
{
    $itoa64 = './0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz';

    $random_state = uniqid();
    $random = '';
    $count = 6;

    if (($fh = @fopen('/dev/urandom', 'rb')))
    {
        $random = fread($fh, $count);
        fclose($fh);
    }

    if (strlen($random) < $count)
    {
        $random = '';

        for ($i = 0; $i < $count; $i += 16)
        {
            $random_state = md5(uniqid() . $random_state);
            $random .= pack('H*', md5($random_state));
        }
        $random = substr($random, 0, $count);
    }
    
    $hash = _hash_crypt_private($password, _hash_gensalt_private($random, $itoa64), $itoa64);

    if (strlen($hash) == 34)
    {
        return $hash;
    }

    return md5($password);
}

/**
* Check for correct password
*/
function phpbb_check_hash($password, $hash)
{
    $itoa64 = './0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz';
    if (strlen($hash) == 34)
    {
        return (_hash_crypt_private($password, $hash, $itoa64) === $hash) ? true : false;
    }

    return (md5($password) === $hash) ? true : false;
}

/**
* Generate salt for hash generation
*/
function _hash_gensalt_private($input, &$itoa64, $iteration_count_log2 = 6)
{
    if ($iteration_count_log2 < 4 || $iteration_count_log2 > 31)
    {
        $iteration_count_log2 = 8;
    }

    $output = '$H$';
    $output .= $itoa64[min($iteration_count_log2 + ((PHP_VERSION >= 5) ? 5 : 3), 30)];
    $output .= _hash_encode64($input, 6, $itoa64);

    return $output;
}

/**
* Encode hash
*/
function _hash_encode64($input, $count, &$itoa64)
{
    $output = '';
    $i = 0;

    do
    {
        $value = ord($input[$i++]);
        $output .= $itoa64[$value & 0x3f];

        if ($i < $count)
        {
            $value |= ord($input[$i]) << 8;
        }

        $output .= $itoa64[($value >> 6) & 0x3f];

        if ($i++ >= $count)
        {
            break;
        }

        if ($i < $count)
        {
            $value |= ord($input[$i]) << 16;
        }

        $output .= $itoa64[($value >> 12) & 0x3f];
        
        if ($i++ >= $count)
        {
            break;
        }

        $output .= $itoa64[($value >> 18) & 0x3f];
    }
    while ($i < $count);

    return $output;
}

/**
* The crypt function/replacement
*/
function _hash_crypt_private($password, $setting, &$itoa64)
{
    $output = '*';

    // Check for correct hash
    if (substr($setting, 0, 3) != '$H$')
    {
        return $output;
    }

    $count_log2 = strpos($itoa64, $setting[3]);

    if ($count_log2 < 7 || $count_log2 > 30)
    {
        return $output;
    }

    $count = 1 << $count_log2;
    $salt = substr($setting, 4, 8);

    if (strlen($salt) != 8)
    {
        return $output;
    }

    /**
    * We're kind of forced to use MD5 here since it's the only
    * cryptographic primitive available in all versions of PHP
    * currently in use.  To implement our own low-level crypto
    * in PHP would result in much worse performance and
    * consequently in lower iteration counts and hashes that are
    * quicker to crack (by non-PHP code).
    */
    if (PHP_VERSION >= 5)
    {
        $hash = md5($salt . $password, true);
        do
        {
            $hash = md5($hash . $password, true);
        }
        while (--$count);
    }
    else
    {
        $hash = pack('H*', md5($salt . $password));
        do
        {
            $hash = pack('H*', md5($hash . $password));
        }
        while (--$count);
    }

    $output = substr($setting, 0, 12);
    $output .= _hash_encode64($hash, 16, $itoa64);

    return $output;
}   
?>

login.php

<?php
include('phpbb.php');

    if (!get_magic_quotes_gpc()) {
        $password = addslashes($_POST['pass']);
        }

    $pass = phpbb_hash($hash);
   
 $query = mysql_query("SELECT user_id FROM phpbb_narutomangausers WHERE username = '$user' AND user_password = '$pass' LIMIT 1");

    if(mysql_num_rows($query) == 1)
    {
//se ha trovato l'utente...
    }
    else
        die('Username o Password errati');
}
?>

Il problema è che non riesco a fare il log in! Mi dice che la passwod non è corretta...

[silvermaledetto]

Hai usato PHP password hashing framework?

No...

[silvermaledetto]

Posso linkartela per MP
dovrebbe in linea teorica essere la soluzione.
Non bisogna estrapolare il criptaggio delle pass dal database perchè questi cambia ad ogni futuro accesso.
Quindi varrebbe solo per un piccolissimo lasso di tempo.
Questo è quel che mi pare di aver notato.