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<?php |
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/** |
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* This file is part of the Shieldon package. |
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* |
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* (c) Terry L. <[email protected]> |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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* |
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* php version 7.1.0 |
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* |
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* @category Web-security |
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* @package Shieldon |
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* @author Terry Lin <[email protected]> |
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* @copyright 2019 terrylinooo |
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* @license https://github.com/terrylinooo/shieldon/blob/2.x/LICENSE MIT |
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* @link https://github.com/terrylinooo/shieldon |
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* @see https://shieldon.io |
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*/ |
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declare(strict_types=1); |
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namespace Shieldon\Firewall\Captcha; |
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use Shieldon\Firewall\Captcha\CaptchaProvider; |
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use function Shieldon\Firewall\get_request; |
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use function Shieldon\Firewall\unset_superglobal; |
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use CurlHandle; // PHP 8 |
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use function curl_error; |
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use function curl_exec; |
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use function curl_init; |
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use function curl_setopt; |
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use function is_string; |
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use function json_decode; |
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/** |
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* Google reCaptcha. |
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*/ |
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class ReCaptcha extends CaptchaProvider |
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{ |
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/** |
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* The site key. |
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* |
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* @var string |
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*/ |
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protected $key = ''; |
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/** |
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* The secret key. |
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* |
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* @var string |
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*/ |
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protected $secret = ''; |
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/** |
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* The version. |
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* |
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* @var string |
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*/ |
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protected $version = 'v2'; |
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/** |
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* The language code of the UI. |
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* |
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* @var string |
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*/ |
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protected $lang = 'en'; |
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/** |
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* The URL of Google ReCaptcha API. |
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* |
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* @var string |
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*/ |
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protected $googleServiceUrl = 'https://www.google.com/recaptcha/api/siteverify'; |
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/** |
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* Constructor. |
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* |
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* It will implement default configuration settings here. |
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* |
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* @param array $config The settings of Google ReCpatcha. |
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* |
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* @return void |
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*/ |
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public function __construct(array $config = []) |
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{ |
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parent::__construct(); |
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foreach ($config as $k => $v) { |
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if (isset($this->{$k})) { |
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$this->{$k} = $v; |
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} |
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} |
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} |
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/** |
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* Response the result from Google service server. |
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* |
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* @return bool |
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*/ |
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public function response(): bool |
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{ |
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$postParams = get_request()->getParsedBody(); |
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if (empty($postParams['g-recaptcha-response'])) { |
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return false; |
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} |
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$flag = false; |
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$reCaptchaToken = str_replace(["'", '"'], '', $postParams['g-recaptcha-response']); |
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$postData = [ |
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'secret' => $this->secret, |
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'response' => $reCaptchaToken, |
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]; |
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$ch = curl_init(); |
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if (version_compare(phpversion(), '8.0.0', '>=')) { |
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if (!$ch instanceof CurlHandle) { |
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// @codeCoverageIgnoreStart |
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return false; |
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// @codeCoverageIgnoreEnd |
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} |
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} else { |
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1 |
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if (!is_resource($ch)) { |
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// @codeCoverageIgnoreStart |
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return false; |
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// @codeCoverageIgnoreEnd |
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} |
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} |
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curl_setopt($ch, CURLOPT_URL, $this->googleServiceUrl); |
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curl_setopt($ch, CURLOPT_HTTPHEADER, array('Expect:')); |
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curl_setopt($ch, CURLOPT_POST, 2); |
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curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 0); |
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curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 0); |
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curl_setopt($ch, CURLOPT_POSTFIELDS, $postData); |
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curl_setopt($ch, CURLOPT_RETURNTRANSFER, true); |
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$ret = curl_exec($ch); |
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// @codeCoverageIgnoreStart |
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if (curl_errno($ch)) { |
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echo 'error:' . curl_error($ch); |
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} |
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// @codeCoverageIgnoreEnd |
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if (isset($ret) && is_string($ret)) { |
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$tmp = json_decode($ret); |
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if ($tmp->success == true) { |
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$flag = true; |
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} |
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} |
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curl_close($ch); |
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// Prevent detecting POST method on RESTful frameworks. |
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unset_superglobal('g-recaptcha-response', 'post'); |
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return $flag; |
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} |
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/** |
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* Output a required HTML for reCaptcha v2. |
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* |
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* @return string |
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*/ |
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public function form(): string |
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{ |
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$html = '<div>'; |
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$html .= '<div style="display: inline-block">'; |
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if ('v3' !== $this->version) { |
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$html .= '<script src="https://www.google.com/recaptcha/api.js?hl=' . $this->lang . '"></script>'; |
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$html .= '<div class="g-recaptcha" data-sitekey="' . $this->key . '"></div>'; |
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} else { |
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$html .= '<input type="hidden" name="g-recaptcha-response" id="g-recaptcha-response" value="">'; |
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$html .= '<script src="https://www.google.com/recaptcha/api.js?render=' . |
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$this->key .'&hl=' . $this->lang . '"></script>'; |
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$html .= '<script>'; |
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$html .= ' grecaptcha.ready(function() {'; |
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$html .= ' grecaptcha.execute("' . $this->key . '", {action: "homepage"}).then(function(token) {'; |
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$html .= ' document.getElementById("g-recaptcha-response").value = token;'; |
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$html .= ' }); '; |
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$html .= ' });'; |
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$html .= '</script>'; |
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} |
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$html .= '</div>'; |
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$html .= '</div>'; |
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return $html; |
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} |
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} |
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terrylinooo /
shieldon
