We're developing a software that will manage users and I need to build an application with Kohana 3 and Auth Module. My application will allow just login. I don't need to append a salt to the passwords when user log in. How could i do that? Thank you.

EDIT:

I know, its wrong but I changed the core. Now I encrypt password without the salt: /kohana/modules/auth/classes/model/auth/user.php

public function login($username, $password, $remember = FALSE)
{
    if (empty($password))
        return FALSE;

    if (is_string($password))
    {
        // Get the salt from the stored password
        //$salt = $this->find_salt($this->password($username));
        // Create a hashed password using the salt from the stored password
        //$password = $this->hash_password($password, $salt);
        $password = sha1($password);
    }

    return $this->_login($username, $password, $remember);
}