[kohana] hasła Opcje

[blokern]

Hej, musze na nowo postawic serwis ktory obecnie stoi na Kohana
mam problem z haslami.
do generowania hasel Kohana wykorzystuje to:

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function hash_password($password, $salt = FALSE)
{
    if ($salt === FALSE)
    {
        // Create a salt seed, same length as the number of offsets in the pattern
        $salt = substr($this->hash(uniqid(NULL, TRUE)), 0, count($this->_config['salt_pattern']));
    }
 
    // Password hash that the salt will be inserted into
    $hash = $this->hash($salt.$password);
 
    // Change salt to an array
    $salt = str_split($salt, 1);
 
    // Returned password
    $password = '';
 
    // Used to calculate the length of splits
    $last_offset = 0;
 
    foreach ($this->_config['salt_pattern'] as $offset)
    {
        // Split a new part of the hash off
        $part = substr($hash, 0, $offset - $last_offset);
 
        // Cut the current part out of the hash
        $hash = substr($hash, $offset - $last_offset);
 
        // Add the part to the password, appending the salt character
        $password .= $part.array_shift($salt);
 
        // Set the last offset to the current offset
        $last_offset = $offset;
    }
 
    // Return the password, with the remaining hash appended
    return $password.$hash;
}
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a plik auth.php

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return array
(
	'driver' => 'ORM',
	'hash_method' => 'sha1',
	'salt_pattern' => '1, 3, 5, 9, 14, 15, 20, 21, 28, 30',
	'lifetime' => 1209600,
	'session_key' => 'auth_user',
	'users' => array
	(
		// 'admin' => '***',
	),
);
[PHP] pobierz, plaintext 

a hasla w bazie są o 10 znaków dluzsze niz te wygenerowane metoda sha1 poniewaz jezeli dobrze rozumiem funkcja dodaje cos na koncu wykorzystuja salt?


jak moge zamienic sha1($haslo) tak zeby dzialalo z tym wyzej i generowalo hasla ktore pasuja do starej bazy?
dziekuje