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Signed-off-by: Madhura Jayaratne <madhura.cj@gmail.com>
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,29 @@ | ||
| Copyright 2014, Google Inc. | ||
| All rights reserved. | ||
|
|
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| Redistribution and use in source and binary forms, with or without | ||
| modification, are permitted provided that the following conditions are | ||
| met: | ||
|
|
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| * Redistributions of source code must retain the above copyright | ||
| notice, this list of conditions and the following disclaimer. | ||
| * 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. | ||
| * Neither the name of Google Inc. 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 | ||
| OWNER 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. | ||
|
|
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| <?php | ||
| /** | ||
| * This is a PHP library that handles calling reCAPTCHA. | ||
| * - Documentation and latest version | ||
| * https://developers.google.com/recaptcha/docs/php | ||
| * - Get a reCAPTCHA API Key | ||
| * https://www.google.com/recaptcha/admin/create | ||
| * - Discussion group | ||
| * http://groups.google.com/group/recaptcha | ||
| * | ||
| * @copyright Copyright (c) 2014, Google Inc. | ||
| * @link http://www.google.com/recaptcha | ||
| * | ||
| * 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. | ||
| */ | ||
|
|
||
| /** | ||
| * A ReCaptchaResponse is returned from checkAnswer(). | ||
| */ | ||
| class ReCaptchaResponse | ||
| { | ||
| public $success; | ||
| public $errorCodes; | ||
| } | ||
|
|
||
| class ReCaptcha | ||
| { | ||
| private static $_signupUrl = "https://www.google.com/recaptcha/admin"; | ||
| private static $_siteVerifyUrl = | ||
| "https://www.google.com/recaptcha/api/siteverify?"; | ||
| private $_secret; | ||
| private static $_version = "php_1.0"; | ||
|
|
||
| /** | ||
| * Constructor. | ||
| * | ||
| * @param string $secret shared secret between site and ReCAPTCHA server. | ||
| */ | ||
| function ReCaptcha($secret) | ||
| { | ||
| if ($secret == null || $secret == "") { | ||
| die("To use reCAPTCHA you must get an API key from <a href='" | ||
| . self::$_signupUrl . "'>" . self::$_signupUrl . "</a>"); | ||
| } | ||
| $this->_secret=$secret; | ||
| } | ||
|
|
||
| /** | ||
| * Encodes the given data into a query string format. | ||
| * | ||
| * @param array $data array of string elements to be encoded. | ||
| * | ||
| * @return string - encoded request. | ||
| */ | ||
| private function _encodeQS($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 GET to a reCAPTCHA server. | ||
| * | ||
| * @param string $path url path to recaptcha server. | ||
| * @param array $data array of parameters to be sent. | ||
| * | ||
| * @return array response | ||
| */ | ||
| private function _submitHTTPGet($path, $data) | ||
| { | ||
| $req = $this->_encodeQS($data); | ||
| $response = file_get_contents($path . $req); | ||
| return $response; | ||
| } | ||
|
|
||
| /** | ||
| * Calls the reCAPTCHA siteverify API to verify whether the user passes | ||
| * CAPTCHA test. | ||
| * | ||
| * @param string $remoteIp IP address of end user. | ||
| * @param string $response response string from recaptcha verification. | ||
| * | ||
| * @return ReCaptchaResponse | ||
| */ | ||
| public function verifyResponse($remoteIp, $response) | ||
| { | ||
| // Discard empty solution submissions | ||
| if ($response == null || strlen($response) == 0) { | ||
| $recaptchaResponse = new ReCaptchaResponse(); | ||
| $recaptchaResponse->success = false; | ||
| $recaptchaResponse->errorCodes = 'missing-input'; | ||
| return $recaptchaResponse; | ||
| } | ||
|
|
||
| $getResponse = $this->_submitHttpGet( | ||
| self::$_siteVerifyUrl, | ||
| array ( | ||
| 'secret' => $this->_secret, | ||
| 'remoteip' => $remoteIp, | ||
| 'v' => self::$_version, | ||
| 'response' => $response | ||
| ) | ||
| ); | ||
| $answers = json_decode($getResponse, true); | ||
| $recaptchaResponse = new ReCaptchaResponse(); | ||
|
|
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| if (trim($answers ['success']) == true) { | ||
| $recaptchaResponse->success = true; | ||
| } else { | ||
| $recaptchaResponse->success = false; | ||
| $recaptchaResponse->errorCodes = $answers ['error-codes']; | ||
| } | ||
|
|
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| return $recaptchaResponse; | ||
| } | ||
| } | ||
|
|
||
| ?> |
Oops, something went wrong.
You need to add "https://apis.google.com https://ssl.gstatic.com" to $captcha_url if you want to see the checkbox reCAPTCHA widget.
Else you only get the fallback widget. See https://developers.google.com/recaptcha/docs/faq#content_security_policy for more details.