130 lines
4 KiB
PHP
130 lines
4 KiB
PHP
<?php
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/* vim: set expandtab sw=4 ts=4 sts=4: */
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/**
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* session handling
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*
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* @todo add failover or warn if sessions are not configured properly
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* @todo add an option to use mm-module for session handler
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*
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* @package PhpMyAdmin
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* @see http://www.php.net/session
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*/
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if (! defined('PHPMYADMIN')) {
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exit;
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}
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// verify if PHP supports session, die if it does not
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if (!@function_exists('session_name')) {
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PMA_warnMissingExtension('session', true);
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} elseif (ini_get('session.auto_start') == true && session_name() != 'phpMyAdmin') {
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// Do not delete the existing session, it might be used by other
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// applications; instead just close it.
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session_write_close();
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}
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// disable starting of sessions before all settings are done
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// does not work, besides how it is written in php manual
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//ini_set('session.auto_start', '0');
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// session cookie settings
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session_set_cookie_params(
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0, $GLOBALS['PMA_Config']->getCookiePath(),
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'', $GLOBALS['PMA_Config']->isHttps(), true
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);
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// cookies are safer (use @ini_set() in case this function is disabled)
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@ini_set('session.use_cookies', 'true');
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// optionally set session_save_path
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$path = $GLOBALS['PMA_Config']->get('SessionSavePath');
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if (!empty($path)) {
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session_save_path($path);
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}
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// but not all user allow cookies
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@ini_set('session.use_only_cookies', 'false');
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// do not force transparent session ids, see bug #3398788
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//@ini_set('session.use_trans_sid', 'true');
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@ini_set(
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'url_rewriter.tags',
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'a=href,frame=src,input=src,form=fakeentry,fieldset='
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);
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//ini_set('arg_separator.output', '&');
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// delete session/cookies when browser is closed
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@ini_set('session.cookie_lifetime', '0');
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// warn but don't work with bug
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@ini_set('session.bug_compat_42', 'false');
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@ini_set('session.bug_compat_warn', 'true');
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// use more secure session ids
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@ini_set('session.hash_function', '1');
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// some pages (e.g. stylesheet) may be cached on clients, but not in shared
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// proxy servers
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session_cache_limiter('private');
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// start the session
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// on some servers (for example, sourceforge.net), we get a permission error
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// on the session data directory, so I add some "@"
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// See bug #1538132. This would block normal behavior on a cluster
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//ini_set('session.save_handler', 'files');
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$session_name = 'phpMyAdmin';
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@session_name($session_name);
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if (! isset($_COOKIE[$session_name])) {
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// on first start of session we check for errors
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// f.e. session dir cannot be accessed - session file not created
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$orig_error_count = $GLOBALS['error_handler']->countErrors();
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$session_result = session_start();
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if ($session_result !== true
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|| $orig_error_count != $GLOBALS['error_handler']->countErrors()
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) {
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setcookie($session_name, '', 1);
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/*
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* Session initialization is done before selecting language, so we
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* can not use translations here.
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*/
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PMA_fatalError(
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'Error during session start; please check your PHP and/or '
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. 'webserver log file and configure your PHP '
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. 'installation properly. Also ensure that cookies are enabled '
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. 'in your browser.'
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);
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}
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unset($orig_error_count, $session_result);
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} else {
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session_start();
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}
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/**
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* Token which is used for authenticating access queries.
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* (we use "space PMA_token space" to prevent overwriting)
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*/
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if (! isset($_SESSION[' PMA_token '])) {
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$_SESSION[' PMA_token '] = md5(uniqid(rand(), true));
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}
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/**
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* tries to secure session from hijacking and fixation
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* should be called before login and after successful login
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* (only required if sensitive information stored in session)
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*
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* @return void
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*/
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function PMA_secureSession()
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{
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// prevent session fixation and XSS
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// (better to use session_status() if available)
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if ((PMA_PHP_INT_VERSION >= 50400 && session_status() === PHP_SESSION_ACTIVE)
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|| (PMA_PHP_INT_VERSION < 50400 && session_id() !== '')
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) {
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session_regenerate_id(true);
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}
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$_SESSION[' PMA_token '] = md5(uniqid(rand(), true));
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}
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?>
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