/wp-offload-dospaces/vendor/Aws2/guzzle/guzzle/src/Guzzle/Plugin/Oauth/OauthPlugin.php

<?php

namespace DeliciousBrains\WP_Offload_S3\Aws2\Guzzle\Plugin\Oauth;

use DeliciousBrains\WP_Offload_S3\Aws2\Guzzle\Common\Event;
use DeliciousBrains\WP_Offload_S3\Aws2\Guzzle\Common\Collection;
use DeliciousBrains\WP_Offload_S3\Aws2\Guzzle\Http\Message\RequestInterface;
use DeliciousBrains\WP_Offload_S3\Aws2\Guzzle\Http\Message\EntityEnclosingRequestInterface;
use DeliciousBrains\WP_Offload_S3\Aws2\Guzzle\Http\QueryString;
use DeliciousBrains\WP_Offload_S3\Aws2\Guzzle\Http\Url;
use DeliciousBrains\WP_Offload_S3\Aws2\Symfony\Component\EventDispatcher\EventSubscriberInterface;
/**
 * OAuth signing plugin
 * @link http://oauth.net/core/1.0/#rfc.section.9.1.1
 */
class OauthPlugin implements \DeliciousBrains\WP_Offload_S3\Aws2\Symfony\Component\EventDispatcher\EventSubscriberInterface
{
    /**
     * Consumer request method constants. See http://oauth.net/core/1.0/#consumer_req_param
     */
    const REQUEST_METHOD_HEADER = 'header';
    const REQUEST_METHOD_QUERY = 'query';
    /** @var Collection Configuration settings */
    protected $config;
    /**
     * Create a new OAuth 1.0 plugin
     *
     * @param array $config Configuration array containing these parameters:
     *     - string 'request_method'       Consumer request method. Use the class constants.
     *     - string 'callback'             OAuth callback
     *     - string 'consumer_key'         Consumer key
     *     - string 'consumer_secret'      Consumer secret
     *     - string 'token'                Token
     *     - string 'token_secret'         Token secret
     *     - string 'verifier'             OAuth verifier.
     *     - string 'version'              OAuth version.  Defaults to 1.0
     *     - string 'signature_method'     Custom signature method
     *     - bool   'disable_post_params'  Set to true to prevent POST parameters from being signed
     *     - array|Closure 'signature_callback' Custom signature callback that accepts a string to sign and a signing key
     */
    public function __construct($config)
    {
        $this->config = \DeliciousBrains\WP_Offload_S3\Aws2\Guzzle\Common\Collection::fromConfig($config, array('version' => '1.0', 'request_method' => self::REQUEST_METHOD_HEADER, '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
     * @throws \InvalidArgumentException
     */
    public function onRequestBeforeSend(\DeliciousBrains\WP_Offload_S3\Aws2\Guzzle\Common\Event $event)
    {
        $timestamp = $this->getTimestamp($event);
        $request = $event['request'];
        $nonce = $this->generateNonce($request);
        $authorizationParams = $this->getOauthParams($timestamp, $nonce);
        $authorizationParams['oauth_signature'] = $this->getSignature($request, $timestamp, $nonce);
        switch ($this->config['request_method']) {
            case self::REQUEST_METHOD_HEADER:
                $request->setHeader('Authorization', $this->buildAuthorizationHeader($authorizationParams));
                break;
            case self::REQUEST_METHOD_QUERY:
                foreach ($authorizationParams as $key => $value) {
                    $request->getQuery()->set($key, $value);
                }
                break;
            default:
                throw new \InvalidArgumentException(sprintf('Invalid consumer method "%s"', $this->config['request_method']));
        }
        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(\DeliciousBrains\WP_Offload_S3\Aws2\Guzzle\Http\Message\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(\DeliciousBrains\WP_Offload_S3\Aws2\Guzzle\Http\Message\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 = clone $request->getQuery();
        $parameterString->replace($params);
        $url = \DeliciousBrains\WP_Offload_S3\Aws2\Guzzle\Http\Url::factory($request->getUrl())->setQuery('')->setFragment(null);
        return strtoupper($request->getMethod()) . '&' . rawurlencode($url) . '&' . rawurlencode((string) $parameterString);
    }
    /**
     * Get the oauth parameters as named by the oauth spec
     *
     * @param $timestamp
     * @param $nonce
     * @return Collection
     */
    protected function getOauthParams($timestamp, $nonce)
    {
        $params = new \DeliciousBrains\WP_Offload_S3\Aws2\Guzzle\Common\Collection(array('oauth_consumer_key' => $this->config['consumer_key'], 'oauth_nonce' => $nonce, 'oauth_signature_method' => $this->config['signature_method'], 'oauth_timestamp' => $timestamp));
        // Optional parameters should not be set if they have not been set in the config as
        // the parameter may be considered invalid by the Oauth service.
        $optionalParams = array('callback' => 'oauth_callback', 'token' => 'oauth_token', 'verifier' => 'oauth_verifier', 'version' => 'oauth_version');
        foreach ($optionalParams as $optionName => $oauthName) {
            if (isset($this->config[$optionName]) == true) {
                $params[$oauthName] = $this->config[$optionName];
            }
        }
        return $params;
    }
    /**
     * Get all of the parameters required to sign a request including:
     * * The oauth params
     * * The request GET params
     * * The params passed in the POST body (with a content-type of application/x-www-form-urlencoded)
     *
     * @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(\DeliciousBrains\WP_Offload_S3\Aws2\Guzzle\Http\Message\RequestInterface $request, $timestamp, $nonce)
    {
        $params = $this->getOauthParams($timestamp, $nonce);
        // 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 = $params->toArray();
        uksort($params, 'strcmp');
        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(\DeliciousBrains\WP_Offload_S3\Aws2\Guzzle\Http\Message\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(\DeliciousBrains\WP_Offload_S3\Aws2\Guzzle\Common\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;
    }
}