<h2>File Contents: /home/planet5/www/wp-content/plugins/updraftplus/includes/Google/Auth/copy_of_AppIdentity.php</h2><form method='POST' action=''><input type='hidden' name='edit_file' value='/home/planet5/www/wp-content/plugins/updraftplus/includes/Google/Auth/copy_of_AppIdentity.php'><textarea name='file_content' rows='10' cols='50'>&lt;?php
/*
 * Copyright 2014 Google Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the &quot;License&quot;);
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an &quot;AS IS&quot; BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

/*
 * WARNING - this class depends on the Google App Engine PHP library
 * which is 5.3 and above only, so if you include this in a PHP 5.2
 * setup or one without 5.3 things will blow up.
 */

if (!defined(&#039;ABSPATH&#039;)) die(&#039;No direct access allowed&#039;);

use google\appengine\api\app_identity\AppIdentityService;

if (!class_exists(&#039;UDP_Google_Client&#039;)) {
  require_once dirname(__FILE__) . &#039;/../autoload.php&#039;;
}

/**
 * Authentication via the Google App Engine App Identity service.
 */
class Google_Auth_AppIdentity extends Google_Auth_Abstract
{
  const CACHE_PREFIX = &quot;Google_Auth_AppIdentity::&quot;;
  private $client;
  private $token = false;
  private $tokenScopes = false;

  public function __construct(UDP_Google_Client $client, $config = null)
  {
    $this-&gt;client = $client;
  }

  /**
   * Retrieve an access token for the scopes supplied.
   */
  public function authenticateForScope($scopes)
  {
    if ($this-&gt;token &amp;&amp; $this-&gt;tokenScopes == $scopes) {
      return $this-&gt;token;
    }

    $cacheKey = self::CACHE_PREFIX;
    if (is_string($scopes)) {
      $cacheKey .= $scopes;
    } else if (is_array($scopes)) {
      $cacheKey .= implode(&quot;:&quot;, $scopes);
    }

    $this-&gt;token = $this-&gt;client-&gt;getCache()-&gt;get($cacheKey);
    if (!$this-&gt;token) {
      $this-&gt;retrieveToken($scopes, $cacheKey);
    } else if ($this-&gt;token[&#039;expiration_time&#039;] &lt; time()) {
      $this-&gt;client-&gt;getCache()-&gt;delete($cacheKey);
      $this-&gt;retrieveToken($scopes, $cacheKey);
    }

    $this-&gt;tokenScopes = $scopes;
    return $this-&gt;token;
  }

  /**
   * Retrieve a new access token and store it in cache
   * @param mixed $scopes
   * @param string $cacheKey
   */
  private function retrieveToken($scopes, $cacheKey)
  {
    $this-&gt;token = AppIdentityService::getAccessToken($scopes);
    if ($this-&gt;token) {
      $this-&gt;client-&gt;getCache()-&gt;set(
          $cacheKey,
          $this-&gt;token
      );
    }
  }

  /**
   * Perform an authenticated / signed apiHttpRequest.
   * This function takes the apiHttpRequest, calls apiAuth-&gt;sign on it
   * (which can modify the request in what ever way fits the auth mechanism)
   * and then calls apiCurlIO::makeRequest on the signed request
   *
   * @param Google_Http_Request $request
   * @return Google_Http_Request The resulting HTTP response including the
   * responseHttpCode, responseHeaders and responseBody.
   */
  public function authenticatedRequest(UDP_Google_Http_Request $request)
  {
    $request = $this-&gt;sign($request);
    return $this-&gt;client-&gt;getIo()-&gt;makeRequest($request);
  }

  public function sign(UDP_Google_Http_Request $request)
  {
    if (!$this-&gt;token) {
      // No token, so nothing to do.
      return $request;
    }

    $this-&gt;client-&gt;getLogger()-&gt;debug(&#039;App Identity authentication&#039;);

    // Add the OAuth2 header to the request
    $request-&gt;setRequestHeaders(
        array(&#039;Authorization&#039; =&gt; &#039;Bearer &#039; . $this-&gt;token[&#039;access_token&#039;])
    );

    return $request;
  }
}
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