<?php
- /**
- * Elgg captcha plugin graphics file generator
- *
- * @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 2008-2010
- * @link http://elgg.com/
- */
-
- global $CONFIG;
- $token = get_input('captcha_token');
-
- // Output captcha
- if ($token) {
- // Set correct header
- header("Content-type: image/jpeg");
-
- // Generate captcha
- $captcha = captcha_generate_captcha($token);
-
- // Pick a random background image
- $n = rand(1, $CONFIG->captcha_num_bg);
- $image = imagecreatefromjpeg($CONFIG->pluginspath . "captcha/backgrounds/bg$n.jpg");
-
- // Create a colour (black so its not a simple matter of masking out one colour and ocring the rest)
- $colour = imagecolorallocate($image, 0,0,0);
-
- // Write captcha to image
- //imagestring($image, 5, 30, 4, $captcha, $black);
- imagettftext($image, 30, 0, 10, 30, $colour, $CONFIG->pluginspath . "captcha/fonts/1.ttf", $captcha);
-
- // Output image
- imagejpeg($image);
-
- // Free memory
- imagedestroy($image);
- }
-?>
\ No newline at end of file
+/**
+ * Elgg captcha plugin graphics file generator
+ *
+ * @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 2008-2010
+ * @link http://elgg.com/
+ */
+
+global $CONFIG;
+$token = get_input('captcha_token');
+
+// Output captcha
+if ($token) {
+ // Set correct header
+ header("Content-type: image/jpeg");
+
+ // Generate captcha
+ $captcha = captcha_generate_captcha($token);
+
+ // Pick a random background image
+ $n = rand(1, $CONFIG->captcha_num_bg);
+ $image = imagecreatefromjpeg($CONFIG->pluginspath . "captcha/backgrounds/bg$n.jpg");
+
+ // Create a colour (black so its not a simple matter of masking out one colour and ocring the rest)
+ $colour = imagecolorallocate($image, 0,0,0);
+
+ // Write captcha to image
+ //imagestring($image, 5, 30, 4, $captcha, $black);
+ imagettftext($image, 30, 0, 10, 30, $colour, $CONFIG->pluginspath . "captcha/fonts/1.ttf", $captcha);
+
+ // Output image
+ imagejpeg($image);
+
+ // Free memory
+ imagedestroy($image);
+}
<?php
- /**
- * Elgg captcha plugin
- *
- * @package captcha
- * @license http://www.gnu.org/licenses/old-licenses/gpl-2.0.html GNU Public License version 2
- * @author Curverider Ltd
- * @copyright Curverider Ltd 2008-2010
- * @link http://elgg.com/
- */
+/**
+ * Elgg captcha plugin
+ *
+ * @package captcha
+ * @license http://www.gnu.org/licenses/old-licenses/gpl-2.0.html GNU Public License version 2
+ * @author Curverider Ltd
+ * @copyright Curverider Ltd 2008-2010
+ * @link http://elgg.com/
+ */
+
+function captcha_init() {
+ global $CONFIG;
+
+ // Register page handler for captcha functionality
+ register_page_handler('captcha','captcha_page_handler');
+
+ // Extend CSS
+ elgg_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);
- function captcha_init() {
- global $CONFIG;
-
- // Register page handler for captcha functionality
- register_page_handler('captcha','captcha_page_handler');
-
- // Extend CSS
- elgg_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", $action, "captcha_verify_action_hook");
+ if (($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, $CONFIG->captcha_length));
+function captcha_page_handler($page) {
+ global $CONFIG;
+
+ if (isset($page[0])) {
+ set_input('captcha_token', $page[0]);
}
-
- /**
- * Verify a captcha based on the input value entered by the user and the seed token passed.
- *
- * @param string $input_value
- * @param string $seed_token
- * @return bool
+
+ include($CONFIG->pluginspath . "captcha/captcha.php");
+}
+
+/**
+ * Generate a token to act as a seed value for the captcha algorithm.
+ */
+function captcha_generate_token() {
+ // Use action token plus some random for uniqueness
+ return md5(generate_action_token(time()) . rand());
+}
+
+/**
+ * Generate a captcha based on the given seed value and length.
+ *
+ * @param string $seed_token
+ * @return string
+ */
+function captcha_generate_captcha($seed_token) {
+ global $CONFIG;
+
+ /*
+ * We generate a token out of the random seed value + some session data,
+ * this means that solving via pr0n site or indian cube farm becomes
+ * significantly more tricky (we hope).
+ *
+ * We also add the site secret, which is unavailable to the client and so should
+ * make it very very hard to guess values before hand.
+ *
*/
- function captcha_verify_captcha($input_value, $seed_token) {
- if (strcasecmp($input_value, captcha_generate_captcha($seed_token)) == 0)
- return true;
-
- return false;
+
+ 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;
}
-
- /**
- * 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;
+
+ return FALSE;
+}
+
+/**
+ * Listen to the action plugin hook and check the captcha.
+ *
+ * @param string $hook
+ * @param string $entity_type
+ * @param mixed $returnvalue
+ * @param array $params
+ */
+function captcha_verify_action_hook($hook, $entity_type, $returnvalue, $params) {
+ $token = get_input('captcha_token');
+ $input = get_input('captcha_input');
+
+ if (($token) && (captcha_verify_captcha($input, $token))) {
+ return TRUE;
}
-
- /**
- * 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_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 string $hook
+ * @param string $entity_type
+ * @param mixed $returnvalue
+ * @param array $params
+ */
+function captcha_actionlist_hook($hook, $entity_type, $returnvalue, $params) {
+ if (!is_array($returnvalue)) {
+ $returnvalue = array();
}
-
- register_elgg_event_handler('init','system','captcha_init');
-?>
\ No newline at end of file
+
+ $returnvalue[] = 'register';
+ $returnvalue[] = 'user/requestnewpassword';
+
+ return $returnvalue;
+}
+
+register_elgg_event_handler('init', 'system', 'captcha_init');
projects / lorea / elgg.git / commitdiff