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Diffstat (limited to 'mod/captcha/start.php')
| -rw-r--r-- | mod/captcha/start.php | 141 |
1 files changed, 0 insertions, 141 deletions
diff --git a/mod/captcha/start.php b/mod/captcha/start.php deleted file mode 100644 index 982a01c2c..000000000 --- a/mod/captcha/start.php +++ /dev/null @@ -1,141 +0,0 @@ -<?php - /** - * Elgg captcha plugin - * - * @package ElggCaptcha - * @license http://www.gnu.org/licenses/old-licenses/gpl-2.0.html GNU Public License version 2 - * @author Curverider Ltd - * @copyright Curverider Ltd 2008-2009 - * @link http://elgg.com/ - */ - - function captcha_init() - { - global $CONFIG; - - // Register page handler for captcha functionality - register_page_handler('captcha','captcha_page_handler'); - - // Extend CSS - extend_view('css','captcha/css'); - - // Number of background images - $CONFIG->captcha_num_bg = 5; - - // Default length - $CONFIG->captcha_length = 5; - - // Register a function that provides some default override actions - register_plugin_hook('actionlist', 'captcha', 'captcha_actionlist_hook'); - - // Register actions to intercept - $actions = array(); - $actions = trigger_plugin_hook('actionlist', 'captcha', null, $actions); - - if (($actions) && (is_array($actions))) - { - foreach ($actions as $action) - register_plugin_hook("action", $action, "captcha_verify_action_hook"); - } - } - - function captcha_page_handler($page) - { - global $CONFIG; - - if (isset($page[0])) { - set_input('captcha_token',$page[0]); - } - - include($CONFIG->pluginspath . "captcha/captcha.php"); - } - - /** - * Generate a token to act as a seed value for the captcha algorithm. - */ - function captcha_generate_token() - { - return md5(generate_action_token(time()).rand()); // Use action token plus some random for uniqueness - } - - /** - * Generate a captcha based on the given seed value and length. - * - * @param string $seed_token - * @return string - */ - function captcha_generate_captcha($seed_token) - { - global $CONFIG; - - /* - * We generate a token out of the random seed value + some session data, - * this means that solving via pr0n site or indian cube farm becomes - * significantly more tricky (we hope). - * - * We also add the site secret, which is unavailable to the client and so should - * make it very very hard to guess values before hand. - * - */ - - return strtolower(substr(md5(generate_action_token(0) . $seed_token), 0, $CONFIG->captcha_length)); - } - - /** - * Verify a captcha based on the input value entered by the user and the seed token passed. - * - * @param string $input_value - * @param string $seed_token - * @return bool - */ - function captcha_verify_captcha($input_value, $seed_token) - { - if (strcasecmp($input_value, captcha_generate_captcha($seed_token)) == 0) - return true; - - return false; - } - - /** - * Listen to the action plugin hook and check the captcha. - * - * @param unknown_type $hook - * @param unknown_type $entity_type - * @param unknown_type $returnvalue - * @param unknown_type $params - */ - function captcha_verify_action_hook($hook, $entity_type, $returnvalue, $params) - { - $token = get_input('captcha_token'); - $input = get_input('captcha_input'); - - if (($token) && (captcha_verify_captcha($input, $token))) - return true; - - register_error(elgg_echo('captcha:captchafail')); - - return false; - } - - /** - * This function returns an array of actions the captcha will expect a captcha for, other plugins may - * add their own to this list thereby extending the use. - * - * @param unknown_type $hook - * @param unknown_type $entity_type - * @param unknown_type $returnvalue - * @param unknown_type $params - */ - function captcha_actionlist_hook($hook, $entity_type, $returnvalue, $params) - { - if (!is_array($returnvalue)) - $returnvalue = array(); - - $returnvalue[] = 'register'; - $returnvalue[] = 'user/requestnewpassword'; - - return $returnvalue; - } - - register_elgg_event_handler('init','system','captcha_init'); -?>
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