--- /dev/null
+<?php
+/*
+ * This is a PHP library that handles calling reCAPTCHA.
+ * - Documentation and latest version
+ * http://recaptcha.net/plugins/php/
+ * - Get a reCAPTCHA API Key
+ * https://www.google.com/recaptcha/admin/create
+ * - Discussion group
+ * http://groups.google.com/group/recaptcha
+ *
+ * Copyright (c) 2007 reCAPTCHA -- http://recaptcha.net
+ * AUTHORS:
+ * Mike Crawford
+ * Ben Maurer
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+/**
+ * The reCAPTCHA server URL's
+ */
+define("RECAPTCHA_API_SERVER", "http://www.google.com/recaptcha/api.js");
+define("RECAPTCHA_API_SECURE_SERVER", "https://www.google.com/recaptcha/api.js");
+define("RECAPTCHA_VERIFY_SERVER", "https://www.google.com");
+
+use GuzzleHttp\Client;
+
+/**
+ * Encodes the given data into a query string format
+ * @param $data - array of string elements to be encoded
+ * @return string - encoded request
+ */
+function _recaptcha_qsencode ($data) {
+ $req = "";
+ foreach ($data as $key => $value) {
+ $req .= $key . '=' . urlencode(stripslashes($value)) . '&';
+ }
+
+ // Cut the last '&'
+ $req = substr($req, 0, strlen($req) - 1);
+ return $req;
+}
+
+/**
+ * Submits an HTTP POST to a reCAPTCHA server
+ * @param string $host
+ * @param string $path
+ * @param array $data
+ * @return string response
+ */
+function _recaptcha_http_post($host, $path, $data) {
+ $client = new Client();
+ try {
+ $response = $client->request('POST', $host . '/' . $path, ['query' => $data]);
+ }
+ catch (Exception $e) {
+ return '';
+ }
+ return (string) $response->getBody();
+}
+
+/**
+ * Gets the challenge HTML (javascript and non-javascript version).
+ * This is called from the browser, and the resulting reCAPTCHA HTML widget
+ * is embedded within the HTML form it was called from.
+ * @param string $pubkey A public key for reCAPTCHA
+ * @param string $error The error given by reCAPTCHA (optional, default is null)
+ * @param boolean $use_ssl Should the request be made over ssl? (optional, default is false)
+ *
+ * @return string - The HTML to be embedded in the user's form.
+ */
+function recaptcha_get_html ($pubkey, $error = NULL, $use_ssl = FALSE) {
+ if ($pubkey == NULL || $pubkey == '') {
+ die("To use reCAPTCHA you must get an API key from <a href='https://www.google.com/recaptcha/admin/create'>https://www.google.com/recaptcha/admin/create</a>");
+ }
+
+ if ($use_ssl) {
+ $server = RECAPTCHA_API_SECURE_SERVER;
+ }
+ else {
+ $server = RECAPTCHA_API_SERVER;
+ }
+
+ $errorpart = "";
+ if ($error) {
+ $errorpart = "&error=" . $error;
+ }
+ return '<div class="g-recaptcha" data-sitekey="' . $pubkey . '"></div>
+ <script type="text/javascript" src="' . $server . '"></script>
+
+ <noscript>
+ <iframe src="' . $server . '" height="300" width="500" frameborder="0"></iframe><br/>
+ <div class="g-recaptcha" data-sitekey="' . $pubkey . '"></div>
+ </noscript>';
+}
+
+/**
+ * A ReCaptchaResponse is returned from recaptcha_check_answer()
+ */
+class ReCaptchaResponse {
+ public $is_valid;
+ public $error;
+
+}
+
+/**
+ * Calls an HTTP POST function to verify if the user's guess was correct
+ * @param string $privkey
+ * @param string $remoteip
+ * @param string $response
+ * @param array $extra_params an array of extra variables to post to the server
+ * @return ReCaptchaResponse
+ */
+function recaptcha_check_answer ($privkey, $remoteip, $response, $extra_params = array()) {
+ if ($privkey == NULL || $privkey == '') {
+ die("To use reCAPTCHA you must get an API key from <a href='https://www.google.com/recaptcha/admin/create'>https://www.google.com/recaptcha/admin/create</a>");
+ }
+
+ if ($remoteip == NULL || $remoteip == '') {
+ die("For security reasons, you must pass the remote ip to reCAPTCHA");
+ }
+
+ //discard spam submissions
+ if ($response == NULL || strlen($response) == 0) {
+ $recaptcha_response = new ReCaptchaResponse();
+ $recaptcha_response->is_valid = FALSE;
+ $recaptcha_response->error = 'incorrect-captcha-sol';
+ return $recaptcha_response;
+ }
+
+ $validationResponse = _recaptcha_http_post(RECAPTCHA_VERIFY_SERVER, "/recaptcha/api/siteverify",
+ [
+ 'secret' => $privkey,
+ 'remoteip' => $remoteip,
+ 'response' => $response,
+ ] + $extra_params
+ );
+
+ $answers = json_decode($validationResponse, TRUE);
+ $recaptcha_response = new ReCaptchaResponse();
+
+ $recaptcha_response->is_valid = $answers['success'];
+ $recaptcha_response->error = $answers['error-codes'];
+ return $recaptcha_response;
+
+}
+
+/**
+ * gets a URL where the user can sign up for reCAPTCHA. If your application
+ * has a configuration page where you enter a key, you should provide a link
+ * using this function.
+ * @param string $domain The domain where the page is hosted
+ * @param string $appname The name of your application
+ */
+function recaptcha_get_signup_url ($domain = NULL, $appname = NULL) {
+ return "https://www.google.com/recaptcha/admin/create?" . _recaptcha_qsencode(array('domains' => $domain, 'app' => $appname));
+}
+
+function _recaptcha_aes_pad($val) {
+ $block_size = 16;
+ $numpad = $block_size - (strlen($val) % $block_size);
+ return str_pad($val, strlen($val) + $numpad, chr($numpad));
+}
+
+/**
+ * Mailhide related code
+ */
+function _recaptcha_aes_encrypt($val, $ky) {
+ if (!function_exists("mcrypt_encrypt")) {
+ die("To use reCAPTCHA Mailhide, you need to have the mcrypt php module installed.");
+ }
+ $mode = MCRYPT_MODE_CBC;
+ $enc = MCRYPT_RIJNDAEL_128;
+ $val = _recaptcha_aes_pad($val);
+ return mcrypt_encrypt($enc, $ky, $val, $mode, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0");
+}
+
+function _recaptcha_mailhide_urlbase64 ($x) {
+ return strtr(base64_encode($x), '+/', '-_');
+}
+
+/**
+ * gets the reCAPTCHA Mailhide url for a given email, public key and private key
+ */
+function recaptcha_mailhide_url($pubkey, $privkey, $email) {
+ if ($pubkey == '' || $pubkey == NULL || $privkey == "" || $privkey == NULL) {
+ die("To use reCAPTCHA Mailhide, you have to sign up for a public and private key, " .
+ "you can do so at <a href='http://www.google.com/recaptcha/mailhide/apikey'>http://www.google.com/recaptcha/mailhide/apikey</a>");
+ }
+
+ $ky = pack('H*', $privkey);
+ $cryptmail = _recaptcha_aes_encrypt($email, $ky);
+
+ return "http://www.google.com/recaptcha/mailhide/d?k=" . $pubkey . "&c=" . _recaptcha_mailhide_urlbase64($cryptmail);
+}
+
+/**
+ * gets the parts of the email to expose to the user.
+ * eg, given johndoe@example,com return ["john", "example.com"].
+ * the email is then displayed as john...@example.com
+ */
+function _recaptcha_mailhide_email_parts ($email) {
+ $arr = preg_split("/@/", $email);
+
+ if (strlen($arr[0]) <= 4) {
+ $arr[0] = substr($arr[0], 0, 1);
+ }
+ elseif (strlen($arr[0]) <= 6) {
+ $arr[0] = substr($arr[0], 0, 3);
+ }
+ else {
+ $arr[0] = substr($arr[0], 0, 4);
+ }
+ return $arr;
+}
+
+/**
+ * Gets html to display an email address given a public an private key.
+ * to get a key, go to:
+ *
+ * http://www.google.com/recaptcha/mailhide/apikey
+ */
+function recaptcha_mailhide_html($pubkey, $privkey, $email) {
+ $emailparts = _recaptcha_mailhide_email_parts($email);
+ $url = recaptcha_mailhide_url($pubkey, $privkey, $email);
+
+ return htmlentities($emailparts[0]) . "<a href='" . htmlentities($url) .
+ "' onclick=\"window.open('" . htmlentities($url) . "', '', 'toolbar=0,scrollbars=0,location=0,statusbar=0,menubar=0,resizable=0,width=500,height=300'); return false;\" title=\"Reveal this e-mail address\">...</a>@" . htmlentities($emailparts[1]);
+
+}
projects / civicrm-core.git / commitdiff