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ReCaptcha
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Editing: ReCaptcha.php
<?php /** * This is a PHP library that handles calling reCAPTCHA. * * BSD 3-Clause License * @copyright (c) 2019, Google Inc. * @link https://www.google.com/recaptcha * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are met: * 1. Redistributions of source code must retain the above copyright notice, this * list of conditions and the following disclaimer. * * 2. Redistributions in binary form must reproduce the above copyright notice, * this list of conditions and the following disclaimer in the documentation * and/or other materials provided with the distribution. * * 3. Neither the name of the copyright holder nor the names of its * contributors may be used to endorse or promote products derived from * this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ namespace ReCaptcha; /** * reCAPTCHA client. */ class ReCaptcha { /** * Version of this client library. * @const string */ const VERSION = 'php_1.2.4'; /** * URL for reCAPTCHA siteverify API * @const string */ const SITE_VERIFY_URL = 'https://www.google.com/recaptcha/api/siteverify'; /** * Invalid JSON received * @const string */ const E_INVALID_JSON = 'invalid-json'; /** * Could not connect to service * @const string */ const E_CONNECTION_FAILED = 'connection-failed'; /** * Did not receive a 200 from the service * @const string */ const E_BAD_RESPONSE = 'bad-response'; /** * Not a success, but no error codes received! * @const string */ const E_UNKNOWN_ERROR = 'unknown-error'; /** * ReCAPTCHA response not provided * @const string */ const E_MISSING_INPUT_RESPONSE = 'missing-input-response'; /** * Expected hostname did not match * @const string */ const E_HOSTNAME_MISMATCH = 'hostname-mismatch'; /** * Expected APK package name did not match * @const string */ const E_APK_PACKAGE_NAME_MISMATCH = 'apk_package_name-mismatch'; /** * Expected action did not match * @const string */ const E_ACTION_MISMATCH = 'action-mismatch'; /** * Score threshold not met * @const string */ const E_SCORE_THRESHOLD_NOT_MET = 'score-threshold-not-met'; /** * Challenge timeout * @const string */ const E_CHALLENGE_TIMEOUT = 'challenge-timeout'; /** * Shared secret for the site. * @var string */ private $secret; /** * Method used to communicate with service. Defaults to POST request. * @var RequestMethod */ private $requestMethod; public $hostname; public $apkPackageName; public $action; public $threshold; public $timeoutSeconds; /** * Create a configured instance to use the reCAPTCHA service. * * @param string $secret The shared key between your site and reCAPTCHA. * @param RequestMethod $requestMethod method used to send the request. Defaults to POST. * @throws \RuntimeException if $secret is invalid */ public function __construct($secret, RequestMethod $requestMethod = null) { if (empty($secret)) { throw new \RuntimeException('No secret provided'); } if (!is_string($secret)) { throw new \RuntimeException('The provided secret must be a string'); } $this->secret = $secret; $this->requestMethod = (is_null($requestMethod)) ? new RequestMethod\Post() : $requestMethod; } /** * Calls the reCAPTCHA siteverify API to verify whether the user passes * CAPTCHA test and additionally runs any specified additional checks * * @param string $response The user response token provided by reCAPTCHA, verifying the user on your site. * @param string $remoteIp The end user's IP address. * @return Response Response from the service. */ public function verify($response, $remoteIp = null) { // Discard empty solution submissions if (empty($response)) { $recaptchaResponse = new Response(false, array(self::E_MISSING_INPUT_RESPONSE)); return $recaptchaResponse; } $params = new RequestParameters($this->secret, $response, $remoteIp, self::VERSION); $rawResponse = $this->requestMethod->submit($params); $initialResponse = Response::fromJson($rawResponse); $validationErrors = array(); if (isset($this->hostname) && strcasecmp($this->hostname, $initialResponse->getHostname()) !== 0) { $validationErrors[] = self::E_HOSTNAME_MISMATCH; } if (isset($this->apkPackageName) && strcasecmp($this->apkPackageName, $initialResponse->getApkPackageName()) !== 0) { $validationErrors[] = self::E_APK_PACKAGE_NAME_MISMATCH; } if (isset($this->action) && strcasecmp($this->action, $initialResponse->getAction()) !== 0) { $validationErrors[] = self::E_ACTION_MISMATCH; } if (isset($this->threshold) && $this->threshold > $initialResponse->getScore()) { $validationErrors[] = self::E_SCORE_THRESHOLD_NOT_MET; } if (isset($this->timeoutSeconds)) { $challengeTs = strtotime($initialResponse->getChallengeTs()); if ($challengeTs > 0 && time() - $challengeTs > $this->timeoutSeconds) { $validationErrors[] = self::E_CHALLENGE_TIMEOUT; } } if (empty($validationErrors)) { return $initialResponse; } return new Response( false, array_merge($initialResponse->getErrorCodes(), $validationErrors), $initialResponse->getHostname(), $initialResponse->getChallengeTs(), $initialResponse->getApkPackageName(), $initialResponse->getScore(), $initialResponse->getAction() ); } /** * Provide a hostname to match against in verify() * This should be without a protocol or trailing slash, e.g. www.google.com * * @param string $hostname Expected hostname * @return ReCaptcha Current instance for fluent interface */ public function setExpectedHostname($hostname) { $this->hostname = $hostname; return $this; } /** * Provide an APK package name to match against in verify() * * @param string $apkPackageName Expected APK package name * @return ReCaptcha Current instance for fluent interface */ public function setExpectedApkPackageName($apkPackageName) { $this->apkPackageName = $apkPackageName; return $this; } /** * Provide an action to match against in verify() * This should be set per page. * * @param string $action Expected action * @return ReCaptcha Current instance for fluent interface */ public function setExpectedAction($action) { $this->action = $action; return $this; } /** * Provide a threshold to meet or exceed in verify() * Threshold should be a float between 0 and 1 which will be tested as response >= threshold. * * @param float $threshold Expected threshold * @return ReCaptcha Current instance for fluent interface */ public function setScoreThreshold($threshold) { $this->threshold = floatval($threshold); return $this; } /** * Provide a timeout in seconds to test against the challenge timestamp in verify() * * @param int $timeoutSeconds Expected hostname * @return ReCaptcha Current instance for fluent interface */ public function setChallengeTimeout($timeoutSeconds) { $this->timeoutSeconds = $timeoutSeconds; return $this; } }
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