265 lines
8.7 KiB
PHP
265 lines
8.7 KiB
PHP
<?php
|
|
|
|
namespace Guzzle\Plugin\Oauth;
|
|
|
|
use Guzzle\Common\Event;
|
|
use Guzzle\Common\Collection;
|
|
use Guzzle\Http\Message\RequestInterface;
|
|
use Guzzle\Http\Message\EntityEnclosingRequestInterface;
|
|
use Guzzle\Http\QueryString;
|
|
use Guzzle\Http\Url;
|
|
use Symfony\Component\EventDispatcher\EventSubscriberInterface;
|
|
|
|
/**
|
|
* OAuth signing plugin
|
|
* @link http://oauth.net/core/1.0/#rfc.section.9.1.1
|
|
*/
|
|
class OauthPlugin implements EventSubscriberInterface
|
|
{
|
|
/** @var Collection Configuration settings */
|
|
protected $config;
|
|
|
|
/**
|
|
* Create a new OAuth 1.0 plugin
|
|
*
|
|
* @param array $config Configuration array containing these parameters:
|
|
* - string 'callback' OAuth callback
|
|
* - string 'consumer_key' Consumer key
|
|
* - string 'consumer_secret' Consumer secret
|
|
* - string 'token' Token
|
|
* - string 'token_secret' Token secret
|
|
* - string 'verifier' OAuth verifier.
|
|
* - string 'version' OAuth version. Defaults to 1.0
|
|
* - string 'signature_method' Custom signature method
|
|
* - bool 'disable_post_params' Set to true to prevent POST parameters from being signed
|
|
* - array|Closure 'signature_callback' Custom signature callback that accepts a string to sign and a signing key
|
|
*/
|
|
public function __construct($config)
|
|
{
|
|
$this->config = Collection::fromConfig($config, array(
|
|
'version' => '1.0',
|
|
'consumer_key' => 'anonymous',
|
|
'consumer_secret' => 'anonymous',
|
|
'signature_method' => 'HMAC-SHA1',
|
|
'signature_callback' => function($stringToSign, $key) {
|
|
return hash_hmac('sha1', $stringToSign, $key, true);
|
|
}
|
|
), array(
|
|
'signature_method', 'signature_callback', 'version',
|
|
'consumer_key', 'consumer_secret'
|
|
));
|
|
}
|
|
|
|
public static function getSubscribedEvents()
|
|
{
|
|
return array(
|
|
'request.before_send' => array('onRequestBeforeSend', -1000)
|
|
);
|
|
}
|
|
|
|
/**
|
|
* Request before-send event handler
|
|
*
|
|
* @param Event $event Event received
|
|
* @return array
|
|
*/
|
|
public function onRequestBeforeSend(Event $event)
|
|
{
|
|
$timestamp = $this->getTimestamp($event);
|
|
$request = $event['request'];
|
|
$nonce = $this->generateNonce($request);
|
|
|
|
$authorizationParams = array(
|
|
'oauth_callback' => $this->config['callback'],
|
|
'oauth_consumer_key' => $this->config['consumer_key'],
|
|
'oauth_nonce' => $nonce,
|
|
'oauth_signature' => $this->getSignature($request, $timestamp, $nonce),
|
|
'oauth_signature_method' => $this->config['signature_method'],
|
|
'oauth_timestamp' => $timestamp,
|
|
'oauth_token' => $this->config['token'],
|
|
'oauth_verifier' => $this->config['verifier'],
|
|
'oauth_version' => $this->config['version'],
|
|
);
|
|
|
|
$request->setHeader(
|
|
'Authorization',
|
|
$this->buildAuthorizationHeader($authorizationParams)
|
|
);
|
|
|
|
return $authorizationParams;
|
|
}
|
|
|
|
/**
|
|
* Builds the Authorization header for a request
|
|
*
|
|
* @param array $authorizationParams Associative array of authorization parameters
|
|
*
|
|
* @return string
|
|
*/
|
|
private function buildAuthorizationHeader($authorizationParams)
|
|
{
|
|
$authorizationString = 'OAuth ';
|
|
foreach ($authorizationParams as $key => $val) {
|
|
if ($val) {
|
|
$authorizationString .= $key . '="' . urlencode($val) . '", ';
|
|
}
|
|
}
|
|
|
|
return substr($authorizationString, 0, -2);
|
|
}
|
|
|
|
/**
|
|
* Calculate signature for request
|
|
*
|
|
* @param RequestInterface $request Request to generate a signature for
|
|
* @param integer $timestamp Timestamp to use for nonce
|
|
* @param string $nonce
|
|
*
|
|
* @return string
|
|
*/
|
|
public function getSignature(RequestInterface $request, $timestamp, $nonce)
|
|
{
|
|
$string = $this->getStringToSign($request, $timestamp, $nonce);
|
|
$key = urlencode($this->config['consumer_secret']) . '&' . urlencode($this->config['token_secret']);
|
|
|
|
return base64_encode(call_user_func($this->config['signature_callback'], $string, $key));
|
|
}
|
|
|
|
/**
|
|
* Calculate string to sign
|
|
*
|
|
* @param RequestInterface $request Request to generate a signature for
|
|
* @param int $timestamp Timestamp to use for nonce
|
|
* @param string $nonce
|
|
*
|
|
* @return string
|
|
*/
|
|
public function getStringToSign(RequestInterface $request, $timestamp, $nonce)
|
|
{
|
|
$params = $this->getParamsToSign($request, $timestamp, $nonce);
|
|
|
|
// Convert booleans to strings.
|
|
$params = $this->prepareParameters($params);
|
|
|
|
// Build signing string from combined params
|
|
$parameterString = new QueryString($params);
|
|
|
|
$url = Url::factory($request->getUrl())->setQuery('')->setFragment(null);
|
|
|
|
return strtoupper($request->getMethod()) . '&'
|
|
. rawurlencode($url) . '&'
|
|
. rawurlencode((string) $parameterString);
|
|
}
|
|
|
|
/**
|
|
* Parameters sorted and filtered in order to properly sign a request
|
|
*
|
|
* @param RequestInterface $request Request to generate a signature for
|
|
* @param integer $timestamp Timestamp to use for nonce
|
|
* @param string $nonce
|
|
*
|
|
* @return array
|
|
*/
|
|
public function getParamsToSign(RequestInterface $request, $timestamp, $nonce)
|
|
{
|
|
$params = new Collection(array(
|
|
'oauth_callback' => $this->config['callback'],
|
|
'oauth_consumer_key' => $this->config['consumer_key'],
|
|
'oauth_nonce' => $nonce,
|
|
'oauth_signature_method' => $this->config['signature_method'],
|
|
'oauth_timestamp' => $timestamp,
|
|
'oauth_token' => $this->config['token'],
|
|
'oauth_verifier' => $this->config['verifier'],
|
|
'oauth_version' => $this->config['version']
|
|
));
|
|
|
|
// Add query string parameters
|
|
$params->merge($request->getQuery());
|
|
|
|
// Add POST fields to signing string if required
|
|
if ($this->shouldPostFieldsBeSigned($request))
|
|
{
|
|
$params->merge($request->getPostFields());
|
|
}
|
|
|
|
// Sort params
|
|
$params = $params->toArray();
|
|
ksort($params);
|
|
|
|
return $params;
|
|
}
|
|
|
|
/**
|
|
* Decide whether the post fields should be added to the base string that Oauth signs.
|
|
* This implementation is correct. Non-conformant APIs may require that this method be
|
|
* overwritten e.g. the Flickr API incorrectly adds the post fields when the Content-Type
|
|
* is 'application/x-www-form-urlencoded'
|
|
*
|
|
* @param $request
|
|
* @return bool Whether the post fields should be signed or not
|
|
*/
|
|
public function shouldPostFieldsBeSigned($request)
|
|
{
|
|
if (!$this->config->get('disable_post_params') &&
|
|
$request instanceof EntityEnclosingRequestInterface &&
|
|
false !== strpos($request->getHeader('Content-Type'), 'application/x-www-form-urlencoded'))
|
|
{
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Returns a Nonce Based on the unique id and URL. This will allow for multiple requests in parallel with the same
|
|
* exact timestamp to use separate nonce's.
|
|
*
|
|
* @param RequestInterface $request Request to generate a nonce for
|
|
*
|
|
* @return string
|
|
*/
|
|
public function generateNonce(RequestInterface $request)
|
|
{
|
|
return sha1(uniqid('', true) . $request->getUrl());
|
|
}
|
|
|
|
/**
|
|
* Gets timestamp from event or create new timestamp
|
|
*
|
|
* @param Event $event Event containing contextual information
|
|
*
|
|
* @return int
|
|
*/
|
|
public function getTimestamp(Event $event)
|
|
{
|
|
return $event['timestamp'] ?: time();
|
|
}
|
|
|
|
/**
|
|
* Convert booleans to strings, removed unset parameters, and sorts the array
|
|
*
|
|
* @param array $data Data array
|
|
*
|
|
* @return array
|
|
*/
|
|
protected function prepareParameters($data)
|
|
{
|
|
ksort($data);
|
|
foreach ($data as $key => &$value) {
|
|
switch (gettype($value)) {
|
|
case 'NULL':
|
|
unset($data[$key]);
|
|
break;
|
|
case 'array':
|
|
$data[$key] = self::prepareParameters($value);
|
|
break;
|
|
case 'boolean':
|
|
$data[$key] = $value ? 'true' : 'false';
|
|
break;
|
|
}
|
|
}
|
|
|
|
return $data;
|
|
}
|
|
}
|