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<?php
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/*
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* Enano - an open-source CMS capable of wiki functions, Drupal-like sidebar blocks, and everything in between
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eb8b23f11744
Two big commits in one day I know, but redid password storage to use HMAC-SHA1. Consolidated much AES processing to three core methods in session that should handle everything automagically. Installation works; upgrades should. Rebranded as 1.1.6.
Dan
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* Version 1.1.6 (Caoineag beta 1)
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* Copyright (C) 2006-2008 Dan Fuhry
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* captcha.php - visual confirmation system used during registration
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*
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* This program is Free Software; you can redistribute and/or modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied
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* warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for details.
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Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
Dan
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*/
6ae6e387a0e3
Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
Dan
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6ae6e387a0e3
Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
Dan
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/**
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Dan
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* The base class for CAPTCHA engines.
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Dan
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* @package Enano
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* @subpackage User management
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* @copyright 2008 Dan Fuhry
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*/
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class captcha_base
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{
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Dan
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6ae6e387a0e3
Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
Dan
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/**
6ae6e387a0e3
Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
Dan
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* Our session ID
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Dan
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* @var string
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*/
6ae6e387a0e3
Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
Dan
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6ae6e387a0e3
Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
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private $session_id;
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Dan
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6ae6e387a0e3
Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
Dan
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/**
6ae6e387a0e3
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Dan
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* Our saved session data
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* @var array
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*/
6ae6e387a0e3
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Dan
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+ − 37
6ae6e387a0e3
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private $session_data;
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+ − 39
6ae6e387a0e3
Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
Dan
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/**
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Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
Dan
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* The confirmation code we're generating.
6ae6e387a0e3
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Dan
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* @var string
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Dan
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*/
6ae6e387a0e3
Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
Dan
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+ − 44
6ae6e387a0e3
Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
Dan
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private $code = '';
6ae6e387a0e3
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Dan
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+ − 46
6ae6e387a0e3
Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
Dan
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+ − 47
/**
6ae6e387a0e3
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Dan
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* Numerical ID (primary key) for our session
6ae6e387a0e3
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* @var int
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*/
6ae6e387a0e3
Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
Dan
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+ − 51
6ae6e387a0e3
Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
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private $id = 0;
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6ae6e387a0e3
Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
Dan
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/**
6ae6e387a0e3
Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
Dan
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* Constructor.
6ae6e387a0e3
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* @param string Session ID for captcha
6ae6e387a0e3
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Dan
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*/
6ae6e387a0e3
Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
Dan
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6ae6e387a0e3
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function __construct($session_id, $row = false)
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{
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global $db, $session, $paths, $template, $plugins; // Common objects
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if ( !preg_match('/^[a-f0-9]{32}([a-z0-9]{8})?$/', $session_id) )
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Dan
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{
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Dan
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throw new Exception('Invalid session ID');
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}
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Dan
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$this->session_id = $session_id;
6ae6e387a0e3
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Dan
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// If we weren't supplied with session info, retreive it
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Dan
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if ( !is_array($row) )
6ae6e387a0e3
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Dan
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{
6ae6e387a0e3
Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
Dan
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$q = $db->sql_query('SELECT code_id, code, session_data FROM ' . table_prefix . "captcha WHERE session_id = '$session_id';");
6ae6e387a0e3
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Dan
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if ( !$q )
6ae6e387a0e3
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Dan
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$db->_die();
6ae6e387a0e3
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Dan
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$row = $db->fetchrow();
6ae6e387a0e3
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Dan
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$row['code_id'] = intval($row['code_id']);
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Dan
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$db->free_result();
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}
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Dan
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if ( !isset($row['code']) || !isset($row['session_data']) || !is_int(@$row['code_id']) )
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Dan
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{
6ae6e387a0e3
Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
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throw new Exception('Row doesn\'t contain what we need (code and session_data)');
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Dan
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}
6ae6e387a0e3
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Dan
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$this->session_data = ( is_array($x = @unserialize($row['session_data'])) ) ? $x : array();
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$this->code = $row['code'];
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Dan
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$this->id = $row['code_id'];
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401
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Dan
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// run any custom init functions
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if ( function_exists(array($this, 'construct_hook')) )
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$this->construct_hook();
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}
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Dan
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Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
Dan
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/**
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* Retrieves a key from the session data set
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* @param int|string Key to fetch
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* @param mixed Default value for key
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* @return mixed
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Dan
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*/
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Dan
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function session_fetch($key, $default = false)
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{
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return ( isset($this->session_data[$key]) ) ? $this->session_data[$key] : $default;
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}
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401
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/**
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* Stores a value in the session's data set. Change must be committed using $captcha->session_commit()
6ae6e387a0e3
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Dan
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* @param int|string Name of key
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* @param mixed Value - can be an array, string, int, or double, but probably not objects :-)
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Dan
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*/
6ae6e387a0e3
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Dan
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function session_store($key, $value)
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{
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$this->session_data[$key] = $value;
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}
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Dan
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/**
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* Commits changes to the session data set to the database.
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*/
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Dan
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function session_commit()
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{
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global $db, $session, $paths, $template, $plugins; // Common objects
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$session_data = serialize($this->session_data);
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$session_data = $db->escape($session_data);
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$code = $db->escape($this->code);
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$q = $db->sql_query('UPDATE ' . table_prefix . "captcha SET code = '$code', session_data = '$session_data' WHERE code_id = {$this->id};");
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if ( !$q )
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$db->_die();
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Dan
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+ − 127
}
6ae6e387a0e3
Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
Dan
diff
changeset
+ − 128
6ae6e387a0e3
Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
Dan
diff
changeset
+ − 129
/**
6ae6e387a0e3
Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
Dan
diff
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+ − 130
* Changes the confirmation code
6ae6e387a0e3
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Dan
diff
changeset
+ − 131
* @param string New string
6ae6e387a0e3
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Dan
diff
changeset
+ − 132
*/
1
+ − 133
401
6ae6e387a0e3
Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
Dan
diff
changeset
+ − 134
function set_code($code)
6ae6e387a0e3
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Dan
diff
changeset
+ − 135
{
6ae6e387a0e3
Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
Dan
diff
changeset
+ − 136
if ( !is_string($code) )
6ae6e387a0e3
Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
Dan
diff
changeset
+ − 137
return false;
6ae6e387a0e3
Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
Dan
diff
changeset
+ − 138
6ae6e387a0e3
Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
Dan
diff
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+ − 139
$this->code = $code;
6ae6e387a0e3
Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
Dan
diff
changeset
+ − 140
}
6ae6e387a0e3
Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
Dan
diff
changeset
+ − 141
6ae6e387a0e3
Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
Dan
diff
changeset
+ − 142
/**
6ae6e387a0e3
Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
Dan
diff
changeset
+ − 143
* Returns the confirmation code
6ae6e387a0e3
Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
Dan
diff
changeset
+ − 144
* @return string
6ae6e387a0e3
Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
Dan
diff
changeset
+ − 145
*/
6ae6e387a0e3
Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
Dan
diff
changeset
+ − 146
6ae6e387a0e3
Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
Dan
diff
changeset
+ − 147
function get_code()
6ae6e387a0e3
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Dan
diff
changeset
+ − 148
{
6ae6e387a0e3
Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
Dan
diff
changeset
+ − 149
return $this->code;
6ae6e387a0e3
Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
Dan
diff
changeset
+ − 150
}
6ae6e387a0e3
Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
Dan
diff
changeset
+ − 151
6ae6e387a0e3
Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
Dan
diff
changeset
+ − 152
}
6ae6e387a0e3
Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
Dan
diff
changeset
+ − 153
6ae6e387a0e3
Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
Dan
diff
changeset
+ − 154
/**
6ae6e387a0e3
Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
Dan
diff
changeset
+ − 155
* Returns a new captcha object
6ae6e387a0e3
Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
Dan
diff
changeset
+ − 156
* @param string Session ID
6ae6e387a0e3
Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
Dan
diff
changeset
+ − 157
* @param string Optional - engine to load
6ae6e387a0e3
Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
Dan
diff
changeset
+ − 158
* @param array Optional row to send to the captcha engine
6ae6e387a0e3
Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
Dan
diff
changeset
+ − 159
*/
6ae6e387a0e3
Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
Dan
diff
changeset
+ − 160
6ae6e387a0e3
Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
Dan
diff
changeset
+ − 161
function captcha_object($session_id, $engine = false, $row = false)
6ae6e387a0e3
Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
Dan
diff
changeset
+ − 162
{
6ae6e387a0e3
Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
Dan
diff
changeset
+ − 163
static $singletons = array();
6ae6e387a0e3
Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
Dan
diff
changeset
+ − 164
if ( !$engine )
6ae6e387a0e3
Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
Dan
diff
changeset
+ − 165
{
6ae6e387a0e3
Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
Dan
diff
changeset
+ − 166
$engine = getConfig('captcha_engine');
6ae6e387a0e3
Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
Dan
diff
changeset
+ − 167
if ( !$engine )
6ae6e387a0e3
Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
Dan
diff
changeset
+ − 168
{
558
+ − 169
$engine = 'freecap';
1
+ − 170
}
+ − 171
}
558
+ − 172
if( !extension_loaded("gd") || !function_exists("gd_info") || !function_exists('imagettftext') || !function_exists('imagepng') || !function_exists('imagecreatefromjpeg') )
1
+ − 173
{
401
6ae6e387a0e3
Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
Dan
diff
changeset
+ − 174
$engine = 'failsafe';
1
+ − 175
}
401
6ae6e387a0e3
Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
Dan
diff
changeset
+ − 176
if ( !class_exists("captcha_engine_$engine") )
1
+ − 177
{
401
6ae6e387a0e3
Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
Dan
diff
changeset
+ − 178
require_once ENANO_ROOT . "/includes/captcha/engine_{$engine}.php";
1
+ − 179
}
401
6ae6e387a0e3
Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
Dan
diff
changeset
+ − 180
if ( !class_exists("captcha_engine_$engine") )
1
+ − 181
{
401
6ae6e387a0e3
Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
Dan
diff
changeset
+ − 182
throw new Exception("Expected but couldn't find class for captcha engine: captcha_engine_$engine");
1
+ − 183
}
401
6ae6e387a0e3
Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
Dan
diff
changeset
+ − 184
$class = "captcha_engine_$engine";
6ae6e387a0e3
Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
Dan
diff
changeset
+ − 185
return new $class($session_id, $row);
1
+ − 186
}
+ − 187
+ − 188
?>