4444455d68
git-svn-id: http://svn.cleancode.org/svn/pickles@127 4d10bc64-7434-11dc-a737-d2d0f8310089
137 lines
4 KiB
PHP
137 lines
4 KiB
PHP
<?php
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/**
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* Security Class File for PICKLES
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*
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* PICKLES is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as
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* published by the Free Software Foundation, either version 3 of
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* the License, or (at your option) any later version.
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*
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* PICKLES is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with PICKLES. If not, see
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* <http://www.gnu.org/licenses/>.
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*
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* @author Joshua John Sherman <josh@phpwithpickles.org>
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* @copyright Copyright 2007, 2008 Joshua John Sherman
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* @link http://phpwithpickles.org
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* @license http://www.gnu.org/copyleft/lesser.html
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* @package PICKLES
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*/
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/**
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* Security Class
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*
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* Handles authenticating a user via an Apache login box.
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*
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* @todo Make the SQL less specific, right now you have to use a table
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* named users, and use the email as the username. I will need
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* to move this to the configuration and allow the user to
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* specify which table to authenticate against, and what column
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* names to use for the username and password.
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*/
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class Security extends Object {
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private $config;
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private $db;
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public function __construct(Config $config, DB $db) {
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parent::__construct();
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$this->config = $config;
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$this->db = $db;
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}
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/**
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* Authenticates the user
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*
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* Checks for the authentication variables to be passed in the $_SERVER
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* super global and attempts to authenticate the user against MySQL. If
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* the user cannot successfully they will be presented with a 401
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* Unauthorized page.
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*
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* @todo I'm sure someone will find the access denied message offensive,
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* so this will need to be made more generic. May also want to
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* add in the ability for someone to add a custom message and/or
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* landing page in the configuration as well.
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*/
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public function authenticate() {
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if (isset($this->config->admin, $this->config->admin->username, $this->config->admin->password)) {
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$_SESSION['user_id'] = null;
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if (isset($_SERVER['PHP_AUTH_USER'])) {
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if (
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$_SERVER['PHP_AUTH_USER'] == $this->config->admin->username
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&& $this->encrypt($this->config->admin->salt, $_SERVER['PHP_AUTH_PW']) == $this->config->admin->password
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) {
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$_SESSION['user_id'] = 1;
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}
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}
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}
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else {
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$table = array(
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'name' => 'users',
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'fields' => array(
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'id' => 'id',
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'username' => 'username',
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'password' => 'password'
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)
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);
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$table = $this->config->getTableMapping('users', $table);
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if (isset($_SERVER['PHP_AUTH_USER'])) {
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$from = '
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FROM ' . $table['name'] . '
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WHERE ' . $table['fields']['username'] . ' = "' . $_SERVER['PHP_AUTH_USER'] . '"
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AND ' . $table['fields']['password'] . ' = "' . md5($_SERVER['PHP_AUTH_PW']) . '";
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';
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$this->db->execute('SELECT COUNT(' . $table['fields']['id'] . ') ' . $from);
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if ($this->db->getField() != 0) {
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$this->db->execute('SELECT ' . $table['fields']['id'] . ' ' . $from);
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$_SESSION['user_id'] = $this->db->getField();
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}
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else {
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$_SESSION['user_id'] = null;
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}
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}
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}
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if (!isset($_SESSION['user_id'])) {
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header('WWW-Authenticate: Basic realm="' . $_SERVER['SERVER_NAME'] . ' Secured Page"');
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header('HTTP/1.0 401 Unauthorized');
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exit('Invalid login credentials, access denied.');
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}
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else {
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/**
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* @todo add logic to allow the site owner to force a redirect when a user logs in
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*/
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//header('Location: /');
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//exit();
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}
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}
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/**
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* Logs the user out
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*
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* Destroys the session, and redirects the user to the root of the site.
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*/
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public function logout() {
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session_destroy();
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header('Location: /');
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}
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public function encrypt($salt, $string) {
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return md5($salt . md5($salt . $string));
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}
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}
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?>
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