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File: example/GoogleClient/auth/Google_AssertionCredentials.php

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  Classes of Vivek Muthal  >  Viv OAuth IMAP  >  example/GoogleClient/auth/Google_AssertionCredentials.php  >  Download  
File: example/GoogleClient/auth/Google_AssertionCredentials.php
Role: Example script
Content type: text/plain
Description: Example script
Class: Viv OAuth IMAP
Access messages in IMAP server using OAuth token
Author: By
Last change:
Date: 1 year ago
Size: 3,061 bytes
 

Contents

Class file image Download
<?php
/*
 * Copyright 2012 Google Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * 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 "AS IS" 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.
 */

/**
 * Credentials object used for OAuth 2.0 Signed JWT assertion grants.
 *
 * @author Chirag Shah <chirags@google.com>
 */
class Google_AssertionCredentials {
  const
MAX_TOKEN_LIFETIME_SECS = 3600;

  public
$serviceAccountName;
  public
$scopes;
  public
$privateKey;
  public
$privateKeyPassword;
  public
$assertionType;
  public
$sub;
 
/**
   * @deprecated
   * @link http://tools.ietf.org/html/draft-ietf-oauth-json-web-token-06
   */
 
public $prn;

 
/**
   * @param $serviceAccountName
   * @param $scopes array List of scopes
   * @param $privateKey
   * @param string $privateKeyPassword
   * @param string $assertionType
   * @param bool|string $sub The email address of the user for which the
   * application is requesting delegated access.
   */
 
public function __construct(
     
$serviceAccountName,
     
$scopes,
     
$privateKey,
     
$privateKeyPassword = 'notasecret',
     
$assertionType = 'http://oauth.net/grant_type/jwt/1.0/bearer',
     
$sub = false) {
   
$this->serviceAccountName = $serviceAccountName;
   
$this->scopes = is_string($scopes) ? $scopes : implode(' ', $scopes);
   
$this->privateKey = $privateKey;
   
$this->privateKeyPassword = $privateKeyPassword;
   
$this->assertionType = $assertionType;
   
$this->sub = $sub;
   
$this->prn = $sub;
  }

  public function
generateAssertion() {
   
$now = time();

   
$jwtParams = array(
         
'aud' => Google_OAuth2::OAUTH2_TOKEN_URI,
         
'scope' => $this->scopes,
         
'iat' => $now,
         
'exp' => $now + self::MAX_TOKEN_LIFETIME_SECS,
         
'iss' => $this->serviceAccountName,
    );

    if (
$this->sub !== false) {
     
$jwtParams['sub'] = $this->sub;
    } else if (
$this->prn !== false) {
     
$jwtParams['prn'] = $this->prn;
    }

    return
$this->makeSignedJwt($jwtParams);
  }

 
/**
   * Creates a signed JWT.
   * @param array $payload
   * @return string The signed JWT.
   */
 
private function makeSignedJwt($payload) {
   
$header = array('typ' => 'JWT', 'alg' => 'RS256');

   
$segments = array(
     
Google_Utils::urlSafeB64Encode(json_encode($header)),
     
Google_Utils::urlSafeB64Encode(json_encode($payload))
    );

   
$signingInput = implode('.', $segments);
   
$signer = new Google_P12Signer($this->privateKey, $this->privateKeyPassword);
   
$signature = $signer->sign($signingInput);
   
$segments[] = Google_Utils::urlSafeB64Encode($signature);

    return
implode(".", $segments);
  }
}