342 lines
8.9 KiB
PHP
342 lines
8.9 KiB
PHP
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<?php
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/**
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* PHPIDS
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*
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* Requirements: PHP5, SimpleXML
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*
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* Copyright (c) 2008 PHPIDS group (http://php-ids.org)
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*
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* PHPIDS 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 published by
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* the Free Software Foundation, version 3 of the License, or
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* (at your option) any later version.
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*
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* PHPIDS 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 License
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* along with PHPIDS. If not, see <http://www.gnu.org/licenses/>.
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*
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* PHP version 5.1.6+
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*
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* @category Security
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* @package PHPIDS
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* @author Mario Heiderich <mario.heiderich@gmail.com>
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* @author Christian Matthies <ch0012@gmail.com>
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* @author Lars Strojny <lars@strojny.net>
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* @license http://www.gnu.org/licenses/lgpl.html LGPL
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* @link http://php-ids.org/
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*/
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/**
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* PHPIDS report object
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*
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* The report objects collects a number of events and thereby presents the
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* detected results. It provides a convenient API to work with the results.
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*
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* Note that this class implements Countable, IteratorAggregate and
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* a __toString() method
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*
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* @category Security
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* @package PHPIDS
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* @author Christian Matthies <ch0012@gmail.com>
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* @author Mario Heiderich <mario.heiderich@gmail.com>
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* @author Lars Strojny <lars@strojny.net>
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* @copyright 2007 The PHPIDS Group
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* @license http://www.gnu.org/licenses/lgpl.html LGPL
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* @version Release: $Id:Report.php 517 2007-09-15 15:04:13Z mario $
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* @link http://php-ids.org/
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*/
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class IDS_Report implements Countable, IteratorAggregate
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{
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/**
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* Event container
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*
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* @var array
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*/
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protected $events = array();
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/**
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* List of affected tags
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*
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* This list of tags is collected from the collected event objects on
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* demand when IDS_Report->getTags() is called
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*
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* @var array
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*/
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protected $tags = array();
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/**
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* Impact level
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*
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* The impact level is calculated on demand by adding the results of the
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* event objects on IDS_Report->getImpact()
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*
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* @var integer
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*/
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protected $impact = 0;
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/**
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* Centrifuge data
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*
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* This variable - initiated as an empty array - carries all information
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* about the centrifuge data if available
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*
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* @var array
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*/
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protected $centrifuge = array();
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/**
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* Constructor
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*
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* @param array $events the events the report should include
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*
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* @return void
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*/
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public function __construct(array $events = null)
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{
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if ($events) {
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foreach ($events as $event) {
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$this->addEvent($event);
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}
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}
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}
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/**
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* Adds an IDS_Event object to the report
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*
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* @param object $event IDS_Event
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*
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* @return object $this
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*/
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public function addEvent(IDS_Event $event)
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{
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$this->clear();
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$this->events[$event->getName()] = $event;
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return $this;
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}
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/**
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* Get event by name
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*
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* In most cases an event is identified by the key of the variable that
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* contained maliciously appearing content
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*
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* @param scalar $name the event name
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*
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* @throws InvalidArgumentException if argument is invalid
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* @return mixed IDS_Event object or false if the event does not exist
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*/
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public function getEvent($name)
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{
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if (!is_scalar($name)) {
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throw new InvalidArgumentException(
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'Invalid argument type given'
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);
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}
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if ($this->hasEvent($name)) {
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return $this->events[$name];
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}
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return false;
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}
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/**
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* Returns list of affected tags
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*
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* @return array
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*/
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public function getTags()
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{
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if (!$this->tags) {
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$this->tags = array();
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foreach ($this->events as $event) {
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$this->tags = array_merge($this->tags,
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$event->getTags());
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}
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$this->tags = array_values(array_unique($this->tags));
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}
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return $this->tags;
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}
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/**
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* Returns total impact
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*
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* Each stored IDS_Event object and its IDS_Filter sub-object are called
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* to calculate the overall impact level of this request
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*
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* @return integer
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*/
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public function getImpact()
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{
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if (!$this->impact) {
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$this->impact = 0;
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foreach ($this->events as $event) {
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$this->impact += $event->getImpact();
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}
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}
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return $this->impact;
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}
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/**
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* Checks if a specific event with given name exists
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*
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* @param scalar $name the event name
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*
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* @throws InvalidArgumentException if argument is illegal
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*
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* @return boolean
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*/
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public function hasEvent($name)
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{
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if (!is_scalar($name)) {
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throw new InvalidArgumentException('Invalid argument given');
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}
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return isset($this->events[$name]);
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}
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/**
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* Returns total amount of events
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*
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* @return integer
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*/
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public function count()
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{
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return count($this->events);
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}
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/**
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* Return iterator object
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*
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* In order to provide the possibility to directly iterate over the
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* IDS_Event object the IteratorAggregate is implemented. One can easily
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* use foreach() to iterate through all stored IDS_Event objects.
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*
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* @return Iterator
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*/
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public function getIterator()
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{
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return new ArrayObject($this->events);
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}
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/**
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* Checks if any events are registered
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*
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* @return boolean
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*/
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public function isEmpty()
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{
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return empty($this->events);
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}
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/**
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* Clears calculated/collected values
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*
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* @return void
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*/
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protected function clear()
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{
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$this->impact = 0;
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$this->tags = array();
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}
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/**
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* This method returns the centrifuge property or null if not
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* filled with data
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*
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* @return array/null
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*/
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public function getCentrifuge()
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{
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return ($this->centrifuge && count($this->centrifuge) > 0)
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? $this->centrifuge : null;
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}
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/**
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* This method sets the centrifuge property
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*
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* @param array $centrifuge the centrifuge data
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*
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* @throws InvalidArgumentException if argument is illegal
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*
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* @return boolean true is arguments were valid
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*/
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public function setCentrifuge($centrifuge = array())
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{
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if (is_array($centrifuge) && $centrifuge) {
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$this->centrifuge = $centrifuge;
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return true;
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}
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throw new InvalidArgumentException('Invalid argument given');
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}
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/**
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* Directly outputs all available information
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*
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* @return string
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*/
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public function __toString()
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{
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if (!$this->isEmpty()) {
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$output = '';
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$output .= 'Total impact: ' . $this->getImpact() . "<br/>\n";
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$output .= 'Affected tags: ' . join(', ', $this->getTags()) .
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"<br/>\n";
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foreach ($this->events as $event) {
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$output .= "<br/>\nVariable: " .
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htmlspecialchars($event->getName()) . ' | Value: ' .
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htmlspecialchars($event->getValue()) . "<br/>\n";
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$output .= 'Impact: ' . $event->getImpact() . ' | Tags: ' .
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join(', ', $event->getTags()) . "<br/>\n";
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foreach ($event as $filter) {
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$output .= 'Description: ' . $filter->getDescription() .
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' | ';
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$output .= 'Tags: ' . join(', ', $filter->getTags()) .
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' | ';
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$output .= 'ID: ' . $filter->getId() .
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"<br/>\n";
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}
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}
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$output .= '<br/>';
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if ($centrifuge = $this->getCentrifuge()) {
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$output .= 'Centrifuge detection data';
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$output .= '<br/> Threshold: ' .
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((isset($centrifuge['threshold'])&&$centrifuge['threshold']) ?
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$centrifuge['threshold'] : '---');
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$output .= '<br/> Ratio: ' .
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((isset($centrifuge['ratio'])&&$centrifuge['ratio']) ?
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$centrifuge['ratio'] : '---');
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if(isset($centrifuge['converted'])) {
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$output .= '<br/> Converted: ' . $centrifuge['converted'];
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}
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$output .= "<br/><br/>\n";
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}
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}
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return isset($output) ? $output : '';
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}
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}
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/**
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* Local variables:
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* tab-width: 4
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* c-basic-offset: 4
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* End:
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* vim600: sw=4 ts=4 expandtab
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*/
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