githubFork/roundcubemail.git

			@@ -1,6 +1,6 @@
			<?php

			/*
			/**
			+-----------------------------------------------------------------------+
			\| This file is part of the Roundcube Webmail client \|
			\| Copyright (C) 2005-2014, The Roundcube Dev Team \|
			@@ -15,37 +15,36 @@
			+-----------------------------------------------------------------------+
			\| Author: Thomas Bruederli <roundcube@gmail.com> \|
			\| Author: Aleksander Machniak <alec@alec.pl> \|
			\| Author: Cor Bosman <cor@roundcu.be> \|
			+-----------------------------------------------------------------------+
			*/

			/**
			* Class to provide database supported session storage
			* Abstract class to provide database supported session storage
			*
			* @package Framework
			* @subpackage Core
			* @author Thomas Bruederli <roundcube@gmail.com>
			* @author Aleksander Machniak <alec@alec.pl>
			*/
			class rcube_session
			abstract class rcube_session
			{
			private $db;
			private $ip;
			private $start;
			private $changed;
			private $time_diff = 0;
			private $reloaded = false;
			private $appends = array();
			private $unsets = array();
			private $gc_handlers = array();
			private $cookiename = 'roundcube_sessauth';
			private $vars;
			private $key;
			private $now;
			private $secret = '';
			private $ip_check = false;
			private $logging = false;
			private $storage;
			private $memcache;
			protected $config;
			protected $key;
			protected $ip;
			protected $changed;
			protected $start;
			protected $vars;
			protected $now;
			protected $time_diff = 0;
			protected $reloaded = false;
			protected $appends = array();
			protected $unsets = array();
			protected $gc_handlers = array();
			protected $cookiename = 'roundcube_sessauth';
			protected $secret = '';
			protected $ip_check = false;
			protected $logging = false;

			/**
			* Blocks session data from being written to database.
			@@ -54,110 +53,126 @@
			*/
			public $nowrite = false;

			/**
			* Factory, returns driver-specific instance of the class
			*
			* @param object $config
			* @return Object rcube_session
			*/
			public static function factory($config)
			{
			// get session storage driver
			$storage = $config->get('session_storage', 'db');

			// class name for this storage
			$class = "rcube_session_" . $storage;

			// try to instantiate class
			if (class_exists($class)) {
			return new $class($config);
			}

			// no storage found, raise error
			rcube::raise_error(array('code' => 604, 'type' => 'session',
			'line' => __LINE__, 'file' => __FILE__,
			'message' => "Failed to find session driver. Check session_storage config option"),
			true, true);
			}

			/**
			* Default constructor
			* @param Object $config
			*/
			public function __construct($db, $config)
			public function __construct($config)
			{
			$this->db = $db;
			$this->start = microtime(true);
			$this->ip = rcube_utils::remote_addr();
			$this->logging = $config->get('log_session', false);
			$this->config = $config;

			$lifetime = $config->get('session_lifetime', 1) * 60;
			$this->set_lifetime($lifetime);
			// set secret
			$this->set_secret($this->config->get('des_key') . dirname($_SERVER['SCRIPT_NAME']));

			// use memcache backend
			$this->storage = $config->get('session_storage', 'db');
			if ($this->storage == 'memcache') {
			$this->memcache = rcube::get_instance()->get_memcache();
			// set ip check
			$this->set_ip_check($this->config->get('ip_check'));

			// set custom functions for PHP session management if memcache is available
			if ($this->memcache) {
			ini_set('session.serialize_handler', 'php');

			session_set_save_handler(
			array($this, 'open'),
			array($this, 'close'),
			array($this, 'mc_read'),
			array($this, 'mc_write'),
			array($this, 'mc_destroy'),
			array($this, 'gc'));
			}
			else {
			rcube::raise_error(array('code' => 604, 'type' => 'db',
			'line' => __LINE__, 'file' => __FILE__,
			'message' => "Failed to connect to memcached. Please check configuration"),
			true, true);
			}
			}
			else if ($this->storage != 'php') {
			ini_set('session.serialize_handler', 'php');

			// set custom functions for PHP session management
			session_set_save_handler(
			array($this, 'open'),
			array($this, 'close'),
			array($this, 'db_read'),
			array($this, 'db_write'),
			array($this, 'db_destroy'),
			array($this, 'gc'));

			$this->table_name = $this->db->table_name('session', true);
			// set cookie name
			if ($this->config->get('session_auth_name')) {
			$this->set_cookiename($this->config->get('session_auth_name'));
			}
			}

			/**
			* register session handler
			*/
			public function register_session_handler()
			{
			ini_set('session.serialize_handler', 'php');

			// set custom functions for PHP session management
			session_set_save_handler(
			array($this, 'open'),
			array($this, 'close'),
			array($this, 'read'),
			array($this, 'sess_write'),
			array($this, 'destroy'),
			array($this, 'gc')
			);
			}

			/**
			* Wrapper for session_start()
			*/
			public function start()
			{
			$this->start = microtime(true);
			$this->ip = rcube_utils::remote_addr();
			$this->logging = $this->config->get('log_session', false);

			$lifetime = $this->config->get('session_lifetime', 1) * 60;
			$this->set_lifetime($lifetime);

			session_start();

			// copy some session properties to object vars
			if ($this->storage == 'php') {
			$this->key = session_id();
			$this->ip = $_SESSION['__IP'];
			$this->changed = $_SESSION['__MTIME'];
			}
			}


			public function open($save_path, $session_name)
			{
			return true;
			}


			public function close()
			{
			return true;
			}


			/**
			* Delete session data for the given key
			*
			* @param string Session ID
			* Abstract methods should be implemented by driver classes
			*/
			public function destroy($key)
			{
			return $this->memcache ? $this->mc_destroy($key) : $this->db_destroy($key);
			}
			abstract function open($save_path, $session_name);
			abstract function close();
			abstract function destroy($key);
			abstract function read($key);
			abstract function write($key, $vars);
			abstract function update($key, $newvars, $oldvars);

			/**
			* session write handler. This calls the implementation methods for write/update after some initial checks.
			*
			* @param $key
			* @param $vars
			*
			* @return bool
			*/
			public function sess_write($key, $vars)
			{
			if ($this->nowrite) {
			return true;
			}

			// check cache
			$oldvars = $this->get_cache($key);

			// if there are cached vars, update store, else insert new data
			if ($oldvars !== null) {
			$newvars = $this->_fixvars($vars, $oldvars);
			return $this->update($key, $newvars, $oldvars);
			}
			else {
			return $this->write($key, $vars);
			}
			}

			/**
			* Wrapper for session_write_close()
			*/
			public function write_close()
			{
			if ($this->storage == 'php') {
			$_SESSION['__IP'] = $this->ip;
			$_SESSION['__MTIME'] = time();
			}

			session_write_close();

			// write_close() is called on script shutdown, see rcube::shutdown()
			@@ -166,91 +181,10 @@
			$this->gc_shutdown();
			}


			/**
			* Read session data from database
			*
			* @param string Session ID
			*
			* @return string Session vars
			*/
			public function db_read($key)
			{
			$sql_result = $this->db->query(
			"SELECT `vars`, `ip`, `changed`, " . $this->db->now() . " AS ts"
			. " FROM {$this->table_name} WHERE `sess_id` = ?", $key);

			if ($sql_result && ($sql_arr = $this->db->fetch_assoc($sql_result))) {
			$this->time_diff = time() - strtotime($sql_arr['ts']);
			$this->changed = strtotime($sql_arr['changed']);
			$this->ip = $sql_arr['ip'];
			$this->vars = base64_decode($sql_arr['vars']);
			$this->key = $key;

			return !empty($this->vars) ? (string) $this->vars : '';
			}

			return null;
			}


			/**
			* Save session data.
			* handler for session_read()
			*
			* @param string Session ID
			* @param string Serialized session vars
			*
			* @return boolean True on success
			*/
			public function db_write($key, $vars)
			{
			$now = $this->db->now();
			$ts = microtime(true);

			if ($this->nowrite)
			return true;

			// no session row in DB (db_read() returns false)
			if (!$this->key) {
			$oldvars = null;
			}
			// use internal data from read() for fast requests (up to 0.5 sec.)
			else if ($key == $this->key && (!$this->vars \|\| $ts - $this->start < 0.5)) {
			$oldvars = $this->vars;
			}
			else { // else read data again from DB
			$oldvars = $this->db_read($key);
			}

			if ($oldvars !== null) {
			$newvars = $this->_fixvars($vars, $oldvars);

			if ($newvars !== $oldvars) {
			$this->db->query("UPDATE {$this->table_name} "
			. "SET `changed` = $now, `vars` = ? WHERE `sess_id` = ?",
			base64_encode($newvars), $key);
			}
			else if ($ts - $this->changed + $this->time_diff > $this->lifetime / 2) {
			$this->db->query("UPDATE {$this->table_name} SET `changed` = $now"
			. " WHERE `sess_id` = ?", $key);
			}
			}
			else {
			$this->db->query("INSERT INTO {$this->table_name}"
			. " (`sess_id`, `vars`, `ip`, `created`, `changed`)"
			. " VALUES (?, ?, ?, $now, $now)",
			$key, base64_encode($vars), (string)$this->ip);
			}

			return true;
			}


			/**
			* Merge vars with old vars and apply unsets
			*/
			private function _fixvars($vars, $oldvars)
			protected function _fixvars($vars, $oldvars)
			{
			if ($oldvars !== null) {
			$a_oldvars = $this->unserialize($oldvars);
			@@ -280,97 +214,6 @@
			return $newvars;
			}


			/**
			* Handler for session_destroy()
			*
			* @param string Session ID
			*
			* @return boolean True on success
			*/
			public function db_destroy($key)
			{
			if ($key) {
			$this->db->query("DELETE FROM {$this->table_name} WHERE `sess_id` = ?", $key);
			}

			return true;
			}


			/**
			* Read session data from memcache
			*
			* @param string Session ID
			* @return string Session vars
			*/
			public function mc_read($key)
			{
			if ($value = $this->memcache->get($key)) {
			$arr = unserialize($value);
			$this->changed = $arr['changed'];
			$this->ip = $arr['ip'];
			$this->vars = $arr['vars'];
			$this->key = $key;

			return !empty($this->vars) ? (string) $this->vars : '';
			}

			return null;
			}


			/**
			* Save session data.
			* handler for session_read()
			*
			* @param string Session ID
			* @param string Serialized session vars
			*
			* @return boolean True on success
			*/
			public function mc_write($key, $vars)
			{
			$ts = microtime(true);

			// no session data in cache (mc_read() returns false)
			if (!$this->key)
			$oldvars = null;
			// use internal data for fast requests (up to 0.5 sec.)
			else if ($key == $this->key && (!$this->vars \|\| $ts - $this->start < 0.5))
			$oldvars = $this->vars;
			else // else read data again
			$oldvars = $this->mc_read($key);

			$newvars = $oldvars !== null ? $this->_fixvars($vars, $oldvars) : $vars;

			if ($newvars !== $oldvars \|\| $ts - $this->changed > $this->lifetime / 3) {
			return $this->memcache->set($key, serialize(array('changed' => time(), 'ip' => $this->ip, 'vars' => $newvars)),
			MEMCACHE_COMPRESSED, $this->lifetime + 60);
			}

			return true;
			}


			/**
			* Handler for session_destroy() with memcache backend
			*
			* @param string Session ID
			*
			* @return boolean True on success
			*/
			public function mc_destroy($key)
			{
			if ($key) {
			// #1488592: use 2nd argument
			$this->memcache->delete($key, 0);
			}

			return true;
			}


			/**
			* Execute registered garbage collector routines
			*/
			@@ -380,7 +223,6 @@
			// see rcube::shutdown() and rcube_session::write_close()
			return $this->gc_enabled = $maxlifetime;
			}


			/**
			* Register additional garbage collector functions
			@@ -398,30 +240,23 @@
			$this->gc_handlers[] = $func;
			}


			/**
			* Garbage collector handler to run on script shutdown
			*/
			protected function gc_shutdown()
			{
			if ($this->gc_enabled) {
			// just delete all expired sessions
			if ($this->storage == 'db') {
			$this->db->query("DELETE FROM {$this->table_name}"
			. " WHERE `changed` < " . $this->db->now(-$this->gc_enabled));
			}

			foreach ($this->gc_handlers as $fct) {
			call_user_func($fct);
			}
			}
			}


			/**
			* Generate and set new session id
			*
			* @param boolean $destroy If enabled the current session will be destroyed
			* @return bool
			*/
			public function regenerate_id($destroy=true)
			{
			@@ -433,6 +268,27 @@
			return true;
			}

			/**
			* see if we have vars of this key already cached, and if so, return them.
			*
			* @param $key
			* @return null\|array
			*/
			protected function get_cache($key)
			{
			// no session data in cache (read() returns false)
			if (!$this->key) {
			$cache = null;
			}
			// use internal data for fast requests (up to 0.5 sec.)
			else if ($key == $this->key && (!$this->vars \|\| $ts - $this->start < 0.5)) {
			$cache = $this->vars;
			}
			else { // else read data again
			$cache = $this->read($key);
			}
			return $cache;
			}

			/**
			* Append the given value to the certain node in the session data array
			@@ -467,7 +323,6 @@
			unset($this->unsets[$path]);
			}


			/**
			* Unset a session variable
			*
			@@ -495,18 +350,16 @@
			return true;
			}


			/**
			* Kill this session
			*/
			public function kill()
			{
			$this->vars = null;
			$this->ip = rcube_utils::remote_addr(); // update IP (might have changed)
			$this->ip = rcube_utils::remote_addr(); // update IP (might have changed)
			$this->destroy(session_id());
			rcube_utils::setcookie($this->cookiename, '-del-', time() - 60);
			}


			/**
			* Re-read session data from storage backend
			@@ -523,10 +376,9 @@
			$node[$k] = $value;
			}

			if ($this->key && $this->memcache)
			$data = $this->mc_read($this->key);
			else if ($this->key)
			$data = $this->db_read($this->key);
			if($this->key) {
			$data = $this->read($this->key);
			}

			if ($data) {
			session_decode($data);
			@@ -553,7 +405,7 @@
			* Returns a reference to the node in data array referenced by the given path.
			* e.g. ['compose','attachments'] will return $_SESSION['compose']['attachments']
			*/
			private function &get_node($path, &$data_arr)
			protected function &get_node($path, &$data_arr)
			{
			$node = &$data_arr;
			if (!empty($path)) {
			@@ -570,7 +422,7 @@
			/**
			* Serialize session data
			*/
			private function serialize($vars)
			protected function serialize($vars)
			{
			$data = '';
			if (is_array($vars)) {
			@@ -584,12 +436,11 @@
			return $data;
			}


			/**
			* Unserialize session data
			* http://www.php.net/manual/en/function.session-decode.php#56106
			*/
			private function unserialize($str)
			protected function unserialize($str)
			{
			$str = (string)$str;
			$endptr = strlen($str);
			@@ -683,7 +534,6 @@
			return unserialize( 'a:' . $items . ':{' . $serialized . '}' );
			}


			/**
			* Setter for session lifetime
			*/
			@@ -696,7 +546,6 @@
			$this->now = $now - ($now % ($this->lifetime / 2));
			}


			/**
			* Getter for remote IP saved with this session
			*/
			@@ -704,7 +553,6 @@
			{
			return $this->ip;
			}


			/**
			* Setter for cookie encryption secret
			@@ -714,7 +562,6 @@
			$this->secret = $secret;
			}


			/**
			* Enable/disable IP check
			*/
			@@ -722,7 +569,6 @@
			{
			$this->ip_check = $check;
			}


			/**
			* Setter for the cookie name used for session cookie
			@@ -733,7 +579,6 @@
			$this->cookiename = $cookiename;
			}
			}


			/**
			* Check session authentication cookie
			@@ -772,7 +617,6 @@
			return $result;
			}


			/**
			* Set session authentication cookie
			*/
			@@ -783,16 +627,67 @@
			$_COOKIE[$this->cookiename] = $this->cookie;
			}


			/**
			* Create session cookie from session data
			* Create session cookie from session data.
			* The cookie will be hashed using a method defined by session.hash_function.
			*
			* @param int Time slot to use
			*
			* @return string
			*/
			function _mkcookie($timeslot)
			protected function _mkcookie($timeslot)
			{
			$auth_string = "$this->key,$this->secret,$timeslot";
			return "S" . (function_exists('sha1') ? sha1($auth_string) : md5($auth_string));
			$hash_method = (string) ini_get('session.hash_function');
			$hash_nbits = (int) ini_get('session.hash_bits_per_character');

			if (!$hash_method) {
			$hash_method = 'md5';
			}
			else if ($hash_method === '1') {
			$hash_method = 'sha1';
			}

			if ($hash_nbits < 4 \|\| $hash_nbits > 6) {
			$hash_nbits = 4;
			}

			// Hash the authentication string
			$hash = openssl_digest($auth_string, $hash_method, true);

			// Above method returns "hexits". To be really compatible
			// with session hashes generated by PHP core we'll get
			// a raw (binary) hash and convert it to a readable form
			// as in bin_to_readable() function in ext/session/session.c.
			$hextab = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ,-";
			$length = strlen($hash);
			$result = '';
			$char = 0;
			$i = 0;
			$have = 0;
			$mask = (1 << $hash_nbits) - 1;

			while (true) {
			if ($have < $hash_nbits) {
			if ($i < $length) {
			$char \|= ord($hash[$i++]) << $have;
			$have += 8;
			}
			else if (!$have) {
			break;
			}
			else {
			$have = $hash_nbits;
			}
			}

			// consume nbits
			$result .= $hextab[$char & $mask];
			$char >>= $hash_nbits;
			$have -= $hash_nbits;
			}

			return $result;
			}

			/**