php-phpbb/phpBB/includes/auth/provider_apache.php

<?php
/**
*
* @package auth
* @copyright (c) 2013 phpBB Group
* @license http://opensource.org/licenses/gpl-2.0.php GNU General Public License v2
*
*/

/**
* @ignore
*/
if (!defined('IN_PHPBB'))
{
	exit;
}

/**
 * Apache authentication provider for phpBB3
 *
 * @package auth
 */
class phpbb_auth_provider_apache implements phpbb_auth_provider_interface
{
	/**
	 * Checks whether the user is identified to apache
	 * Only allow changing authentication to apache if the user is identified
	 * Called in acp_board while setting authentication plugins
	 *
	 * @return boolean|string false if the user is identified and else an error message
	 */
	public function init()
	{
		global $user, $request;

		if (!$request->is_set('PHP_AUTH_USER', phpbb_request_interface::SERVER) || $user->data['username'] !== htmlspecialchars_decode($request->server('PHP_AUTH_USER')))
		{
			return $user->lang['APACHE_SETUP_BEFORE_USE'];
		}
		return false;
	}

	/**
	 * Login function
	 */
	public function login($username, $password)
	{
		global $db, $request;

		// do not allow empty password
		if (!$password)
		{
			return array(
				'status'	=> LOGIN_ERROR_PASSWORD,
				'error_msg'	=> 'NO_PASSWORD_SUPPLIED',
				'user_row'	=> array('user_id' => ANONYMOUS),
			);
		}

		if (!$username)
		{
			return array(
				'status'	=> LOGIN_ERROR_USERNAME,
				'error_msg'	=> 'LOGIN_ERROR_USERNAME',
				'user_row'	=> array('user_id' => ANONYMOUS),
			);
		}

		if (!$request->is_set('PHP_AUTH_USER', phpbb_request_interface::SERVER))
		{
			return array(
				'status'		=> LOGIN_ERROR_EXTERNAL_AUTH,
				'error_msg'		=> 'LOGIN_ERROR_EXTERNAL_AUTH_APACHE',
				'user_row'		=> array('user_id' => ANONYMOUS),
			);
		}

		$php_auth_user = htmlspecialchars_decode($request->server('PHP_AUTH_USER'));
		$php_auth_pw = htmlspecialchars_decode($request->server('PHP_AUTH_PW'));

		if (!empty($php_auth_user) && !empty($php_auth_pw))
		{
			if ($php_auth_user !== $username)
			{
				return array(
					'status'	=> LOGIN_ERROR_USERNAME,
					'error_msg'	=> 'LOGIN_ERROR_USERNAME',
					'user_row'	=> array('user_id' => ANONYMOUS),
				);
			}

			$sql = 'SELECT user_id, username, user_password, user_passchg, user_email, user_type
				FROM ' . USERS_TABLE . "
				WHERE username = '" . $db->sql_escape($php_auth_user) . "'";
			$result = $db->sql_query($sql);
			$row = $db->sql_fetchrow($result);
			$db->sql_freeresult($result);

			if ($row)
			{
				// User inactive...
				if ($row['user_type'] == USER_INACTIVE || $row['user_type'] == USER_IGNORE)
				{
					return array(
						'status'		=> LOGIN_ERROR_ACTIVE,
						'error_msg'		=> 'ACTIVE_ERROR',
						'user_row'		=> $row,
					);
				}

				// Successful login...
				return array(
					'status'		=> LOGIN_SUCCESS,
					'error_msg'		=> false,
					'user_row'		=> $row,
				);
			}

			// this is the user's first login so create an empty profile
			return array(
				'status'		=> LOGIN_SUCCESS_CREATE_PROFILE,
				'error_msg'		=> false,
				'user_row'		=> user_row_apache($php_auth_user, $php_auth_pw),
			);
		}

		// Not logged into apache
		return array(
			'status'		=> LOGIN_ERROR_EXTERNAL_AUTH,
			'error_msg'		=> 'LOGIN_ERROR_EXTERNAL_AUTH_APACHE',
			'user_row'		=> array('user_id' => ANONYMOUS),
		);
	}

	/**
	 * Autologin function
	 *
	 * @return 	array 	containing the user row or empty if no auto login should
	 * 					take place
	 */
	public function autologin()
	{
		global $db, $request;

		if (!$request->is_set('PHP_AUTH_USER', phpbb_request_interface::SERVER))
		{
			return array();
		}

		$php_auth_user = htmlspecialchars_decode($request->server('PHP_AUTH_USER'));
		$php_auth_pw = htmlspecialchars_decode($request->server('PHP_AUTH_PW'));

		if (!empty($php_auth_user) && !empty($php_auth_pw))
		{
			set_var($php_auth_user, $php_auth_user, 'string', true);
			set_var($php_auth_pw, $php_auth_pw, 'string', true);

			$sql = 'SELECT *
				FROM ' . USERS_TABLE . "
				WHERE username = '" . $db->sql_escape($php_auth_user) . "'";
			$result = $db->sql_query($sql);
			$row = $db->sql_fetchrow($result);
			$db->sql_freeresult($result);

			if ($row)
			{
				return ($row['user_type'] == USER_INACTIVE || $row['user_type'] == USER_IGNORE) ? array() : $row;
			}

			if (!function_exists('user_add'))
			{
				global $phpbb_root_path, $phpEx;

				include($phpbb_root_path . 'includes/functions_user.' . $phpEx);
			}

			// create the user if he does not exist yet
			user_add(user_row_apache($php_auth_user, $php_auth_pw));

			$sql = 'SELECT *
				FROM ' . USERS_TABLE . "
				WHERE username_clean = '" . $db->sql_escape(utf8_clean_string($php_auth_user)) . "'";
			$result = $db->sql_query($sql);
			$row = $db->sql_fetchrow($result);
			$db->sql_freeresult($result);

			if ($row)
			{
				return $row;
			}
		}

		return array();
	}

	/**
	 * This function generates an array which can be passed to the user_add
	 * function in order to create a user
	 *
	 * @param 	str 	$username 	The username of the new user.
	 * @param 	str 	$password 	The password of the new user.
	 * @return 	array 				Contains data that can be passed directly to
	 *								the user_add function.
	 */
	private function user_row($username, $password)
	{
		global $db, $config, $user;
		// first retrieve default group id
		$sql = 'SELECT group_id
			FROM ' . GROUPS_TABLE . "
			WHERE group_name = '" . $db->sql_escape('REGISTERED') . "'
				AND group_type = " . GROUP_SPECIAL;
		$result = $db->sql_query($sql);
		$row = $db->sql_fetchrow($result);
		$db->sql_freeresult($result);

		if (!$row)
		{
			trigger_error('NO_GROUP');
		}

		// generate user account data
		return array(
			'username'		=> $username,
			'user_password'	=> phpbb_hash($password),
			'user_email'	=> '',
			'group_id'		=> (int) $row['group_id'],
			'user_type'		=> USER_NORMAL,
			'user_ip'		=> $user->ip,
			'user_new'		=> ($config['new_member_post_limit']) ? 1 : 0,
		);
	}

	/**
	 * The session validation function checks whether the user is still logged in
	 *
	 * @return 	boolean 	true if the given user is authenticated or false if
	 * 						the session should be closed
	 */
	public function validate_session(&$user)
	{
		global $request;

		// Check if PHP_AUTH_USER is set and handle this case
		if ($request->is_set('PHP_AUTH_USER', phpbb_request_interface::SERVER))
		{
			$php_auth_user = $request->server('PHP_AUTH_USER');

			return ($php_auth_user === $user['username']) ? true : false;
		}

		// PHP_AUTH_USER is not set. A valid session is now determined by the user type (anonymous/bot or not)
		if ($user['user_type'] == USER_IGNORE)
		{
			return true;
		}

		return false;
	}

	public function acp($new)
	{
		return;
	}
}