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<?php /* * ************************************************************* * Copyright notice * * Copyright 2011 Daniel Dimitrov. (http://compojoom.com) * All rights reserved * * This script is part of the Hotspots project. The Hotspots project is * free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * The GNU General Public License can be found at * http://www.gnu.org/copyleft/gpl.html. * A copy is found in the textfile GPL.txt and important notices to the license * from the author is found in LICENSE.txt distributed with these scripts. * * * This script is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * This copyright notice MUST APPEAR in all copies of the script! * ************************************************************* / defined('_JEXEC') or die('Restricted access'); / * 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. */ class hotspotsRecaptcha { private $serverURLS = NULL; private $ReCaptchaResponse = NULL; public function __construct() { $this->serverURLS = new stdClass(); $this->serverURLS->RECAPTCHA_API_SERVER = "https://www.google.com/recaptcha/api"; $this->serverURLS->RECAPTCHA_API_SECURE_SERVER = "https://www.google.com/recaptcha/api"; $this->serverURLS->RECAPTCHA_VERIFY_SERVER = "www.google.com"; $this->ReCaptchaResponse = new stdClass(); $this->ReCaptchaResponse->is_valid = NULL; $this->ReCaptchaResponse->error = NULL; $this->publicKey = HotspotsHelperSettings::get('recaptcha_public_key'); $this->privateKey = HotspotsHelperSettings::get('recaptcha_private_key'); } private function qsencode($data) { $req = ""; foreach ($data as $key => $value) { $req .= $key . '=' . urlencode(stripslashes($value)) . '&'; } // Cut the last '&' $req = substr($req, 0, strlen($req) - 1); return $req; } private function httpPost($host, $path, $data, $port = 80) { $req = $this->qsencode($data); $http_request = "POST $path HTTP/1.0\r\n"; $http_request .= "Host: $host\r\n"; $http_request .= "Content-Type: application/x-www-form-urlencoded;\r\n"; $http_request .= "Content-Length: " . strlen($req) . "\r\n"; $http_request .= "User-Agent: reCAPTCHA/PHP\r\n"; $http_request .= "\r\n"; $http_request .= $req; $response = ''; if (false == ( $fs = @fsockopen($host, $port, $errno, $errstr, 10) )) { die('Could not open socket'); } fwrite($fs, $http_request); while (!feof($fs)) $response .= fgets($fs, 1160); // One TCP-IP packet fclose($fs); $response = explode("\r\n\r\n", $response, 2); return $response; } public function getHtml($error = null, $use_ssl = false) { if ($this->publicKey == null \|\| $this->publicKey == "") { die("To use reCAPTCHA you must get an API key from <a href='http://recaptcha.net/api/getkey'>http://recaptcha.net/api/getkey</a>"); } else { } if ($use_ssl) { $server = $this->serverURLS->RECAPTCHA_API_SECURE_SERVER; } else { $server = $this->serverURLS->RECAPTCHA_API_SERVER; } $errorpart = ""; if ($error) { $errorpart = "&error=" . $error; } else { } return '<script type="text/javascript" src="' . $server . '/challenge?k=' . $this->publicKey . $errorpart . '"></script> <noscript> <iframe src="' . $server . '/noscript?k=' . $this->publicKey . $errorpart . '" height="300" width="500" frameborder="0"></iframe><br/> <textarea name="recaptcha_challenge_field" rows="3" cols="40"></textarea> <input type="hidden" name="recaptcha_response_field" value="manual_challenge"/> </noscript>'; } public function checkAnswer($challenge, $response, $extra_params = array()) { if ($this->privateKey == null \|\| $this->privateKey == "") { die("To use reCAPTCHA you must get an API key from <a href='http://recaptcha.net/api/getkey'>http://recaptcha.net/api/getkey</a>"); } else { } $remoteIp = $_SERVER['REMOTE_ADDR']; //discard spam submissions if ($challenge == null \|\| strlen($challenge) == 0 \|\| $response == null \|\| strlen($response) == 0) { $this->ReCaptchaResponse->is_valid = false; $this->ReCaptchaResponse->error = "incorrect_captcha_sol"; return $this->ReCaptchaResponse; } $response = $this->httpPost($this->serverURLS->RECAPTCHA_VERIFY_SERVER, '/recaptcha/api/verify', array( "privatekey" => $this->privateKey, "remoteip" => $remoteIp, "challenge" => $challenge, "response" => $response ) + $extra_params ); $answers = explode("\n", $response[1]); if (trim($answers [0]) == "true") { $this->ReCaptchaResponse->is_valid = true; } else { $this->ReCaptchaResponse->is_valid = false; $this->ReCaptchaResponse->error = str_replace("-", "_", $answers[1]); } return $this->ReCaptchaResponse; } private function getSignupUrl($domain = null, $appname = null) { return "http://recaptcha.net/api/getkey?" . $this->qsencode(array("domain" => $domain, "app" => $appname)); } private function aesPad($val) { $block_size = 16; $numpad = $block_size - (strlen($val) % $block_size); return str_pad($val, strlen($val) + $numpad, chr($numpad)); } }

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