nextcloud/apps/files_external/3rdparty/Dropbox/OAuth/Curl.php

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<?php
/**
* Dropbox OAuth
*
* @package Dropbox
* @copyright Copyright (C) 2011 Daniel Huesken
* @author Daniel Huesken (http://www.danielhuesken.de/)
* @license MIT
*/
/**
* This class is used to sign all requests to dropbox.
*
* This specific class uses WordPress WP_Http to authenticate.
*/
class Dropbox_OAuth_Curl extends Dropbox_OAuth {
/**
*
* @var string ConsumerKey
*/
protected $consumerKey = null;
/**
*
* @var string ConsumerSecret
*/
protected $consumerSecret = null;
/**
*
* @var string ProzessCallBack
*/
public $ProgressFunction = false;
/**
* Constructor
*
* @param string $consumerKey
* @param string $consumerSecret
*/
public function __construct($consumerKey, $consumerSecret) {
if (!function_exists('curl_exec'))
throw new Dropbox_Exception('The PHP curl functions not available!');
$this->consumerKey = $consumerKey;
$this->consumerSecret = $consumerSecret;
}
/**
* Fetches a secured oauth url and returns the response body.
*
* @param string $uri
* @param mixed $arguments
* @param string $method
* @param array $httpHeaders
* @return string
*/
public function fetch($uri, $arguments = array(), $method = 'GET', $httpHeaders = array()) {
$uri=str_replace('http://', 'https://', $uri); // all https, upload makes problems if not
if (is_string($arguments) and strtoupper($method) == 'POST') {
preg_match("/\?file=(.*)$/i", $uri, $matches);
if (isset($matches[1])) {
$uri = str_replace($matches[0], "", $uri);
$filename = $matches[1];
$httpHeaders=array_merge($httpHeaders,$this->getOAuthHeader($uri, array("file" => $filename), $method));
}
} else {
$httpHeaders=array_merge($httpHeaders,$this->getOAuthHeader($uri, $arguments, $method));
}
$ch = curl_init();
if (strtoupper($method) == 'POST') {
curl_setopt($ch, CURLOPT_URL, $uri);
curl_setopt($ch, CURLOPT_POST, true);
// if (is_array($arguments))
// $arguments=http_build_query($arguments);
curl_setopt($ch, CURLOPT_POSTFIELDS, $arguments);
// $httpHeaders['Content-Length']=strlen($arguments);
} else {
curl_setopt($ch, CURLOPT_URL, $uri.'?'.http_build_query($arguments));
curl_setopt($ch, CURLOPT_POST, false);
}
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_TIMEOUT, 300);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, true);
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 2);
// curl_setopt($ch, CURLOPT_CAINFO, "rootca");
curl_setopt($ch, CURLOPT_FRESH_CONNECT, true);
//Build header
$headers = array();
foreach ($httpHeaders as $name => $value) {
$headers[] = "{$name}: $value";
}
curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
if (!ini_get('safe_mode') && !ini_get('open_basedir'))
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true );
if (function_exists($this->ProgressFunction) and defined('CURLOPT_PROGRESSFUNCTION')) {
curl_setopt($ch, CURLOPT_NOPROGRESS, false);
curl_setopt($ch, CURLOPT_PROGRESSFUNCTION, $this->ProgressFunction);
curl_setopt($ch, CURLOPT_BUFFERSIZE, 512);
}
$response=curl_exec($ch);
$errorno=curl_errno($ch);
$error=curl_error($ch);
$status=curl_getinfo($ch,CURLINFO_HTTP_CODE);
curl_close($ch);
if (!empty($errorno))
throw new Dropbox_Exception_NotFound('Curl error: ('.$errorno.') '.$error."\n");
if ($status>=300) {
$body = json_decode($response,true);
switch ($status) {
// Not modified
case 304 :
return array(
'httpStatus' => 304,
'body' => null,
);
break;
case 403 :
throw new Dropbox_Exception_Forbidden('Forbidden.
This could mean a bad OAuth request, or a file or folder already existing at the target location.
' . $body["error"] . "\n");
case 404 :
throw new Dropbox_Exception_NotFound('Resource at uri: ' . $uri . ' could not be found. ' .
$body["error"] . "\n");
case 507 :
throw new Dropbox_Exception_OverQuota('This dropbox is full. ' .
$body["error"] . "\n");
}
if (!empty($body["error"]))
throw new Dropbox_Exception_RequestToken('Error: ('.$status.') '.$body["error"]."\n");
}
return array(
'body' => $response,
'httpStatus' => $status
);
}
/**
* Returns named array with oauth parameters for further use
* @return array Array with oauth_ parameters
*/
private function getOAuthBaseParams() {
$params['oauth_version'] = '1.0';
$params['oauth_signature_method'] = 'HMAC-SHA1';
$params['oauth_consumer_key'] = $this->consumerKey;
$tokens = $this->getToken();
if (isset($tokens['token']) && $tokens['token']) {
$params['oauth_token'] = $tokens['token'];
}
$params['oauth_timestamp'] = time();
$params['oauth_nonce'] = md5(microtime() . mt_rand());
return $params;
}
/**
* Creates valid Authorization header for OAuth, based on URI and Params
*
* @param string $uri
* @param array $params
* @param string $method GET or POST, standard is GET
* @param array $oAuthParams optional, pass your own oauth_params here
* @return array Array for request's headers section like
* array('Authorization' => 'OAuth ...');
*/
private function getOAuthHeader($uri, $params, $method = 'GET', $oAuthParams = null) {
$oAuthParams = $oAuthParams ? $oAuthParams : $this->getOAuthBaseParams();
// create baseString to encode for the sent parameters
$baseString = $method . '&';
$baseString .= $this->oauth_urlencode($uri) . "&";
// OAuth header does not include GET-Parameters
$signatureParams = array_merge($params, $oAuthParams);
// sorting the parameters
ksort($signatureParams);
$encodedParams = array();
foreach ($signatureParams as $key => $value) {
$encodedParams[] = $this->oauth_urlencode($key) . '=' . $this->oauth_urlencode($value);
}
$baseString .= $this->oauth_urlencode(implode('&', $encodedParams));
// encode the signature
$tokens = $this->getToken();
$hash = $this->hash_hmac_sha1($this->consumerSecret.'&'.$tokens['token_secret'], $baseString);
$signature = base64_encode($hash);
// add signature to oAuthParams
$oAuthParams['oauth_signature'] = $signature;
$oAuthEncoded = array();
foreach ($oAuthParams as $key => $value) {
$oAuthEncoded[] = $key . '="' . $this->oauth_urlencode($value) . '"';
}
return array('Authorization' => 'OAuth ' . implode(', ', $oAuthEncoded));
}
/**
* Requests the OAuth request token.
*
* @return void
*/
public function getRequestToken() {
$result = $this->fetch(self::URI_REQUEST_TOKEN, array(), 'POST');
if ($result['httpStatus'] == "200") {
$tokens = array();
parse_str($result['body'], $tokens);
$this->setToken($tokens['oauth_token'], $tokens['oauth_token_secret']);
return $this->getToken();
} else {
throw new Dropbox_Exception_RequestToken('We were unable to fetch request tokens. This likely means that your consumer key and/or secret are incorrect.');
}
}
/**
* Requests the OAuth access tokens.
*
* This method requires the 'unauthorized' request tokens
* and, if successful will set the authorized request tokens.
*
* @return void
*/
public function getAccessToken() {
$result = $this->fetch(self::URI_ACCESS_TOKEN, array(), 'POST');
if ($result['httpStatus'] == "200") {
$tokens = array();
parse_str($result['body'], $tokens);
$this->setToken($tokens['oauth_token'], $tokens['oauth_token_secret']);
return $this->getToken();
} else {
throw new Dropbox_Exception_RequestToken('We were unable to fetch request tokens. This likely means that your consumer key and/or secret are incorrect.');
}
}
/**
* Helper function to properly urlencode parameters.
* See http://php.net/manual/en/function.oauth-urlencode.php
*
* @param string $string
* @return string
*/
private function oauth_urlencode($string) {
return str_replace('%E7', '~', rawurlencode($string));
}
/**
* Hash function for hmac_sha1; uses native function if available.
*
* @param string $key
* @param string $data
* @return string
*/
private function hash_hmac_sha1($key, $data) {
if (function_exists('hash_hmac') && in_array('sha1', hash_algos())) {
return hash_hmac('sha1', $data, $key, true);
} else {
$blocksize = 64;
$hashfunc = 'sha1';
if (strlen($key) > $blocksize) {
$key = pack('H*', $hashfunc($key));
}
$key = str_pad($key, $blocksize, chr(0x00));
$ipad = str_repeat(chr(0x36), $blocksize);
$opad = str_repeat(chr(0x5c), $blocksize);
$hash = pack('H*', $hashfunc(( $key ^ $opad ) . pack('H*', $hashfunc(($key ^ $ipad) . $data))));
return $hash;
}
}
}