· 7 years ago · Jun 14, 2018, 04:04 AM
1<?php
2// vim: foldmethod=marker
3
4/* Generic exception class
5*/
6class OAuthException extends Exception {/*{{{*/
7 // pass
8}/*}}}*/
9
10class OAuthConsumer {/*{{{*/
11 public $key;
12 public $secret;
13
14 function __construct($key, $secret, $callback_url=NULL) {/*{{{*/
15 $this->
16 key = $key;
17 $this->secret = $secret;
18 $this->callback_url = $callback_url;
19 }/*}}}*/
20
21 function __toString() {/*{{{*/
22 return "OAuthConsumer[key=$this->key,secret=$this->secret]";
23 }/*}}}*/
24}/*}}}*/
25
26class OAuthToken {/*{{{*/
27 // access tokens and request tokens
28 public $key;
29 public $secret;
30
31 /**
32* key = the token
33* secret = the token secret
34*/
35 function __construct($key, $secret) {/*{{{*/
36 $this->key = $key;
37 $this->secret = $secret;
38 }/*}}}*/
39
40 /**
41* generates the basic string serialization of a token that a server
42* would respond to request_token and access_token calls with
43*/
44 function to_string() {/*{{{*/
45 return "oauth_token=" . OAuthUtil::urlencode_rfc3986($this->key) .
46 "&oauth_token_secret=" . OAuthUtil::urlencode_rfc3986($this->secret);
47 }/*}}}*/
48
49 function __toString() {/*{{{*/
50 return $this->to_string();
51 }/*}}}*/
52}/*}}}*/
53
54class OAuthSignatureMethod {/*{{{*/
55 public function check_signature(&$request, $consumer, $token, $signature) {
56 $built = $this->build_signature($request, $consumer, $token);
57 return $built == $signature;
58 }
59}/*}}}*/
60
61class OAuthSignatureMethod_HMAC_SHA1 extends OAuthSignatureMethod {/*{{{*/
62 function get_name() {/*{{{*/
63 return "HMAC-SHA1";
64 }/*}}}*/
65
66 public function build_signature($request, $consumer, $token) {/*{{{*/
67 $base_string = $request->get_signature_base_string();
68 $request->base_string = $base_string;
69
70 $key_parts = array(
71 $consumer->secret,
72 ($token) ? $token->secret : ""
73 );
74
75 $key_parts = OAuthUtil::urlencode_rfc3986($key_parts);
76 $key = implode('&', $key_parts);
77
78 return base64_encode( hash_hmac('sha1', $base_string, $key, true));
79 }/*}}}*/
80}/*}}}*/
81
82class OAuthSignatureMethod_PLAINTEXT extends OAuthSignatureMethod {/*{{{*/
83 public function get_name() {/*{{{*/
84 return "PLAINTEXT";
85 }/*}}}*/
86
87 public function build_signature($request, $consumer, $token) {/*{{{*/
88 $sig = array(
89 OAuthUtil::urlencode_rfc3986($consumer->secret)
90 );
91
92 if ($token) {
93 array_push($sig, OAuthUtil::urlencode_rfc3986($token->secret));
94 } else {
95 array_push($sig, '');
96 }
97
98 $raw = implode("&", $sig);
99 // for debug purposes
100 $request->base_string = $raw;
101
102 return OAuthUtil::urlencode_rfc3986($raw);
103 }/*}}}*/
104}/*}}}*/
105
106class OAuthSignatureMethod_RSA_SHA1 extends OAuthSignatureMethod {/*{{{*/
107 public function get_name() {/*{{{*/
108 return "RSA-SHA1";
109 }/*}}}*/
110
111 protected function fetch_public_cert(&$request) {/*{{{*/
112 // not implemented yet, ideas are:
113 // (1) do a lookup in a table of trusted certs keyed off of consumer
114 // (2) fetch via http using a url provided by the requester
115 // (3) some sort of specific discovery code based on request
116 //
117 // either way should return a string representation of the certificate
118 throw Exception("fetch_public_cert not implemented");
119 }/*}}}*/
120
121 protected function fetch_private_cert(&$request) {/*{{{*/
122 // not implemented yet, ideas are:
123 // (1) do a lookup in a table of trusted certs keyed off of consumer
124 //
125 // either way should return a string representation of the certificate
126 throw Exception("fetch_private_cert not implemented");
127 }/*}}}*/
128
129 public function build_signature(&$request, $consumer, $token) {/*{{{*/
130 $base_string = $request->get_signature_base_string();
131 $request->base_string = $base_string;
132
133 // Fetch the private key cert based on the request
134 $cert = $this->fetch_private_cert($request);
135
136 // Pull the private key ID from the certificate
137 $privatekeyid = openssl_get_privatekey($cert);
138
139 // Sign using the key
140 $ok = openssl_sign($base_string, $signature, $privatekeyid);
141
142 // Release the key resource
143 openssl_free_key($privatekeyid);
144
145 return base64_encode($signature);
146 } /*}}}*/
147
148 public function check_signature(&$request, $consumer, $token, $signature) {/*{{{*/
149 $decoded_sig = base64_decode($signature);
150
151 $base_string = $request->get_signature_base_string();
152
153 // Fetch the public key cert based on the request
154 $cert = $this->fetch_public_cert($request);
155
156 // Pull the public key ID from the certificate
157 $publickeyid = openssl_get_publickey($cert);
158
159 // Check the computed signature against the one passed in the query
160 $ok = openssl_verify($base_string, $decoded_sig, $publickeyid);
161
162 // Release the key resource
163 openssl_free_key($publickeyid);
164
165 return $ok == 1;
166 } /*}}}*/
167}/*}}}*/
168
169class OAuthRequest {/*{{{*/
170 private $parameters;
171 private $http_method;
172 private $http_url;
173 // for debug purposes
174 public $base_string;
175 public static $version = '1.0';
176
177 function __construct($http_method, $http_url, $parameters=NULL) {/*{{{*/
178 @$parameters or $parameters = array();
179 $this->parameters = $parameters;
180 $this->http_method = $http_method;
181 $this->http_url = $http_url;
182 }/*}}}*/
183
184
185 /**
186* attempt to build up a request from what was passed to the server
187*/
188 public static function from_request($http_method=NULL, $http_url=NULL, $parameters=NULL) {/*{{{*/
189 $scheme = (!isset($_SERVER['HTTPS']) || $_SERVER['HTTPS'] != "on") ? 'http' : 'https';
190 @$http_url or $http_url = $scheme . '://' . $_SERVER['HTTP_HOST'] . ':' . $_SERVER['SERVER_PORT'] . $_SERVER['REQUEST_URI'];
191 @$http_method or $http_method = $_SERVER['REQUEST_METHOD'];
192
193 $request_headers = OAuthRequest::get_headers();
194
195 // let the library user override things however they'd like, if they know
196 // which parameters to use then go for it, for example XMLRPC might want to
197 // do this
198 if ($parameters) {
199 $req = new OAuthRequest($http_method, $http_url, $parameters);
200 } else {
201 // collect request parameters from query string (GET) and post-data (POST) if appropriate (note: POST vars have priority)
202 $req_parameters = $_GET;
203 if ($http_method == "POST" && @strstr($request_headers["Content-Type"], "application/x-www-form-urlencoded") ) {
204 $req_parameters = array_merge($req_parameters, $_POST);
205 }
206
207 // next check for the auth header, we need to do some extra stuff
208 // if that is the case, namely suck in the parameters from GET or POST
209 // so that we can include them in the signature
210 if (@substr($request_headers['Authorization'], 0, 6) == "OAuth ") {
211 $header_parameters = OAuthRequest::split_header($request_headers['Authorization']);
212 $parameters = array_merge($req_parameters, $header_parameters);
213 $req = new OAuthRequest($http_method, $http_url, $parameters);
214 } else $req = new OAuthRequest($http_method, $http_url, $req_parameters);
215 }
216
217 return $req;
218 }/*}}}*/
219
220 /**
221* pretty much a helper function to set up the request
222*/
223 public static function from_consumer_and_token($consumer, $token, $http_method, $http_url, $parameters=NULL) {/*{{{*/
224 @$parameters or $parameters = array();
225 $defaults = array("oauth_version" => OAuthRequest::$version,
226 "oauth_nonce" => OAuthRequest::generate_nonce(),
227 "oauth_timestamp" => OAuthRequest::generate_timestamp(),
228 "oauth_consumer_key" => $consumer->key);
229 $parameters = array_merge($defaults, $parameters);
230
231 if ($token) {
232 $parameters['oauth_token'] = $token->key;
233 }
234 return new OAuthRequest($http_method, $http_url, $parameters);
235 }/*}}}*/
236
237 public function set_parameter($name, $value) {/*{{{*/
238 $this->parameters[$name] = $value;
239 }/*}}}*/
240
241 public function get_parameter($name) {/*{{{*/
242 return isset($this->parameters[$name]) ? $this->parameters[$name] : null;
243 }/*}}}*/
244
245 public function get_parameters() {/*{{{*/
246 return $this->parameters;
247 }/*}}}*/
248
249 /**
250* Returns the normalized parameters of the request
251*
252* This will be all (except oauth_signature) parameters,
253* sorted first by key, and if duplicate keys, then by
254* value.
255*
256* The returned string will be all the key=value pairs
257* concated by &.
258*
259* @return string
260*/
261 public function get_signable_parameters() {/*{{{*/
262 // Grab all parameters
263 $params = $this->parameters;
264
265 // Remove oauth_signature if present
266 if (isset($params['oauth_signature'])) {
267 unset($params['oauth_signature']);
268 }
269
270 // Urlencode both keys and values
271 $keys = OAuthUtil::urlencode_rfc3986(array_keys($params));
272 $values = OAuthUtil::urlencode_rfc3986(array_values($params));
273 $params = array_combine($keys, $values);
274
275 // Sort by keys (natsort)
276 uksort($params, 'strcmp');
277
278 // Generate key=value pairs
279 $pairs = array();
280 foreach ($params as $key=>$value ) {
281 if (is_array($value)) {
282 // If the value is an array, it's because there are multiple
283 // with the same key, sort them, then add all the pairs
284 natsort($value);
285 foreach ($value as $v2) {
286 $pairs[] = $key . '=' . $v2;
287 }
288 } else {
289 $pairs[] = $key . '=' . $value;
290 }
291 }
292
293 // Return the pairs, concated with &
294 return implode('&', $pairs);
295 }/*}}}*/
296
297 /**
298* Returns the base string of this request
299*
300* The base string defined as the method, the url
301* and the parameters (normalized), each urlencoded
302* and the concated with &.
303*/
304 public function get_signature_base_string() {/*{{{*/
305 $parts = array(
306 $this->get_normalized_http_method(),
307 $this->get_normalized_http_url(),
308 $this->get_signable_parameters()
309 );
310
311 $parts = OAuthUtil::urlencode_rfc3986($parts);
312
313 return implode('&', $parts);
314 }/*}}}*/
315
316 /**
317* just uppercases the http method
318*/
319 public function get_normalized_http_method() {/*{{{*/
320 return strtoupper($this->http_method);
321 }/*}}}*/
322
323 /**
324* parses the url and rebuilds it to be
325* scheme://host/path
326*/
327 public function get_normalized_http_url() {/*{{{*/
328 $parts = parse_url($this->http_url);
329
330 $port = @$parts['port'];
331 $scheme = $parts['scheme'];
332 $host = $parts['host'];
333 $path = @$parts['path'];
334
335 $port or $port = ($scheme == 'https') ? '443' : '80';
336
337 if (($scheme == 'https' && $port != '443')
338 || ($scheme == 'http' && $port != '80')) {
339 $host = "$host:$port";
340 }
341 return "$scheme://$host$path";
342 }/*}}}*/
343
344 /**
345* builds a url usable for a GET request
346*/
347 public function to_url() {/*{{{*/
348 $out = $this->get_normalized_http_url() . "?";
349 $out .= $this->to_postdata();
350 return $out;
351 }/*}}}*/
352
353 /**
354* builds the data one would send in a POST request
355*
356* TODO(morten.fangel):
357* this function might be easily replaced with http_build_query()
358* and corrections for rfc3986 compatibility.. but not sure
359*/
360 public function to_postdata() {/*{{{*/
361 $total = array();
362 foreach ($this->parameters as $k => $v) {
363 if (is_array($v)) {
364 foreach ($v as $va) {
365 $total[] = OAuthUtil::urlencode_rfc3986($k) . "[]=" . OAuthUtil::urlencode_rfc3986($va);
366 }
367 } else {
368 $total[] = OAuthUtil::urlencode_rfc3986($k) . "=" . OAuthUtil::urlencode_rfc3986($v);
369 }
370 }
371 $out = implode("&", $total);
372 return $out;
373 }/*}}}*/
374
375 /**
376* builds the Authorization: header
377*/
378 public function to_header() {/*{{{*/
379 $out ='Authorization: OAuth realm=""';
380 $total = array();
381 foreach ($this->parameters as $k => $v) {
382 if (substr($k, 0, 5) != "oauth") continue;
383 if (is_array($v)) throw new OAuthException('Arrays not supported in headers');
384 $out .= ',' . OAuthUtil::urlencode_rfc3986($k) . '="' . OAuthUtil::urlencode_rfc3986($v) . '"';
385 }
386 return $out;
387 }/*}}}*/
388
389 public function __toString() {/*{{{*/
390 return $this->to_url();
391 }/*}}}*/
392
393
394 public function sign_request($signature_method, $consumer, $token) {/*{{{*/
395 $this->set_parameter("oauth_signature_method", $signature_method->get_name());
396 $signature = $this->build_signature($signature_method, $consumer, $token);
397 $this->set_parameter("oauth_signature", $signature);
398 }/*}}}*/
399
400 public function build_signature($signature_method, $consumer, $token) {/*{{{*/
401 $signature = $signature_method->build_signature($this, $consumer, $token);
402 return $signature;
403 }/*}}}*/
404
405 /**
406* util function: current timestamp
407*/
408 private static function generate_timestamp() {/*{{{*/
409 return time();
410 }/*}}}*/
411
412 /**
413* util function: current nonce
414*/
415 private static function generate_nonce() {/*{{{*/
416 $mt = microtime();
417 $rand = mt_rand();
418
419 return md5($mt . $rand); // md5s look nicer than numbers
420 }/*}}}*/
421
422 /**
423* util function for turning the Authorization: header into
424* parameters, has to do some unescaping
425*/
426 private static function split_header($header) {/*{{{*/
427 $pattern = '/(([-_a-z]*)=("([^"]*)"|([^,]*)),?)/';
428 $offset = 0;
429 $params = array();
430 while (preg_match($pattern, $header, $matches, PREG_OFFSET_CAPTURE, $offset) > 0) {
431 $match = $matches[0];
432 $header_name = $matches[2][0];
433 $header_content = (isset($matches[5])) ? $matches[5][0] : $matches[4][0];
434 $params[$header_name] = OAuthUtil::urldecode_rfc3986( $header_content );
435 $offset = $match[1] + strlen($match[0]);
436 }
437
438 if (isset($params['realm'])) {
439 unset($params['realm']);
440 }
441
442 return $params;
443 }/*}}}*/
444
445 /**
446* helper to try to sort out headers for people who aren't running apache
447*/
448 private static function get_headers() {/*{{{*/
449 if (function_exists('apache_request_headers')) {
450 // we need this to get the actual Authorization: header
451 // because apache tends to tell us it doesn't exist
452 return apache_request_headers();
453 }
454 // otherwise we don't have apache and are just going to have to hope
455 // that $_SERVER actually contains what we need
456 $out = array();
457 foreach ($_SERVER as $key => $value) {
458 if (substr($key, 0, 5) == "HTTP_") {
459 // this is chaos, basically it is just there to capitalize the first
460 // letter of every word that is not an initial HTTP and strip HTTP
461 // code from przemek
462 $key = str_replace(" ", "-", ucwords(strtolower(str_replace("_", " ", substr($key, 5)))));
463 $out[$key] = $value;
464 }
465 }
466 return $out;
467 }/*}}}*/
468}/*}}}*/
469
470class OAuthServer {/*{{{*/
471 protected $timestamp_threshold = 300; // in seconds, five minutes
472 protected $version = 1.0; // hi blaine
473 protected $signature_methods = array();
474
475 protected $data_store;
476
477 function __construct($data_store) {/*{{{*/
478 $this->data_store = $data_store;
479 }/*}}}*/
480
481 public function add_signature_method($signature_method) {/*{{{*/
482 $this->signature_methods[$signature_method->get_name()] =
483 $signature_method;
484 }/*}}}*/
485
486 // high level functions
487
488 /**
489* process a request_token request
490* returns the request token on success
491*/
492 public function fetch_request_token(&$request) {/*{{{*/
493 $this->get_version($request);
494
495 $consumer = $this->get_consumer($request);
496
497 // no token required for the initial token request
498 $token = NULL;
499
500 $this->check_signature($request, $consumer, $token);
501
502 $new_token = $this->data_store->new_request_token($consumer);
503
504 return $new_token;
505 }/*}}}*/
506
507 /**
508* process an access_token request
509* returns the access token on success
510*/
511 public function fetch_access_token(&$request) {/*{{{*/
512 $this->get_version($request);
513
514 $consumer = $this->get_consumer($request);
515
516 // requires authorized request token
517 $token = $this->get_token($request, $consumer, "request");
518
519
520 $this->check_signature($request, $consumer, $token);
521
522 $new_token = $this->data_store->new_access_token($token, $consumer);
523
524 return $new_token;
525 }/*}}}*/
526
527 /**
528* verify an api call, checks all the parameters
529*/
530 public function verify_request(&$request) {/*{{{*/
531 $this->get_version($request);
532 $consumer = $this->get_consumer($request);
533 $token = $this->get_token($request, $consumer, "access");
534 $this->check_signature($request, $consumer, $token);
535 return array($consumer, $token);
536 }/*}}}*/
537
538 // Internals from here
539 /**
540* version 1
541*/
542 private function get_version(&$request) {/*{{{*/
543 $version = $request->get_parameter("oauth_version");
544 if (!$version) {
545 $version = 1.0;
546 }
547 if ($version && $version != $this->version) {
548 throw new OAuthException("OAuth version '$version' not supported");
549 }
550 return $version;
551 }/*}}}*/
552
553 /**
554* figure out the signature with some defaults
555*/
556 private function get_signature_method(&$request) {/*{{{*/
557 $signature_method =
558 @$request->get_parameter("oauth_signature_method");
559 if (!$signature_method) {
560 $signature_method = "PLAINTEXT";
561 }
562 if (!in_array($signature_method,
563 array_keys($this->signature_methods))) {
564 throw new OAuthException(
565 "Signature method '$signature_method' not supported try one of the following: " . implode(", ", array_keys($this->signature_methods))
566 );
567 }
568 return $this->signature_methods[$signature_method];
569 }/*}}}*/
570
571 /**
572* try to find the consumer for the provided request's consumer key
573*/
574 private function get_consumer(&$request) {/*{{{*/
575 $consumer_key = @$request->get_parameter("oauth_consumer_key");
576 if (!$consumer_key) {
577 throw new OAuthException("Invalid consumer key");
578 }
579
580 $consumer = $this->data_store->lookup_consumer($consumer_key);
581 if (!$consumer) {
582 throw new OAuthException("Invalid consumer");
583 }
584
585 return $consumer;
586 }/*}}}*/
587
588 /**
589* try to find the token for the provided request's token key
590*/
591 private function get_token(&$request, $consumer, $token_type="access") {/*{{{*/
592 $token_field = @$request->get_parameter('oauth_token');
593 $token = $this->data_store->lookup_token(
594 $consumer, $token_type, $token_field
595 );
596 if (!$token) {
597 throw new OAuthException("Invalid $token_type token: $token_field");
598 }
599 return $token;
600 }/*}}}*/
601
602 /**
603* all-in-one function to check the signature on a request
604* should guess the signature method appropriately
605*/
606 private function check_signature(&$request, $consumer, $token) {/*{{{*/
607 // this should probably be in a different method
608 $timestamp = @$request->get_parameter('oauth_timestamp');
609 $nonce = @$request->get_parameter('oauth_nonce');
610
611 $this->check_timestamp($timestamp);
612 $this->check_nonce($consumer, $token, $nonce, $timestamp);
613
614 $signature_method = $this->get_signature_method($request);
615
616 $signature = $request->get_parameter('oauth_signature');
617 $valid_sig = $signature_method->check_signature(
618 $request,
619 $consumer,
620 $token,
621 $signature
622 );
623
624 if (!$valid_sig) {
625 throw new OAuthException("Invalid signature");
626 }
627 }/*}}}*/
628
629 /**
630* check that the timestamp is new enough
631*/
632 private function check_timestamp($timestamp) {/*{{{*/
633 // verify that timestamp is recentish
634 $now = time();
635 if ($now - $timestamp > $this->timestamp_threshold) {
636 throw new OAuthException("Expired timestamp, yours $timestamp, ours $now");
637 }
638 }/*}}}*/
639
640 /**
641* check that the nonce is not repeated
642*/
643 private function check_nonce($consumer, $token, $nonce, $timestamp) {/*{{{*/
644 // verify that the nonce is uniqueish
645 $found = $this->data_store->lookup_nonce($consumer, $token, $nonce, $timestamp);
646 if ($found) {
647 throw new OAuthException("Nonce already used: $nonce");
648 }
649 }/*}}}*/
650
651
652
653}/*}}}*/
654
655class OAuthDataStore {/*{{{*/
656 function lookup_consumer($consumer_key) {/*{{{*/
657 // implement me
658 }/*}}}*/
659
660 function lookup_token($consumer, $token_type, $token) {/*{{{*/
661 // implement me
662 }/*}}}*/
663
664 function lookup_nonce($consumer, $token, $nonce, $timestamp) {/*{{{*/
665 // implement me
666 }/*}}}*/
667
668 function new_request_token($consumer) {/*{{{*/
669 // return a new token attached to this consumer
670 }/*}}}*/
671
672 function new_access_token($token, $consumer) {/*{{{*/
673 // return a new access token attached to this consumer
674 // for the user associated with this token if the request token
675 // is authorized
676 // should also invalidate the request token
677 }/*}}}*/
678
679}/*}}}*/
680
681
682/* A very naive dbm-based oauth storage
683*/
684class SimpleOAuthDataStore extends OAuthDataStore {/*{{{*/
685 private $dbh;
686
687 function __construct($path = "oauth.gdbm") {/*{{{*/
688 $this->dbh = dba_popen($path, 'c', 'gdbm');
689 }/*}}}*/
690
691 function __destruct() {/*{{{*/
692 dba_close($this->dbh);
693 }/*}}}*/
694
695 function lookup_consumer($consumer_key) {/*{{{*/
696 $rv = dba_fetch("consumer_$consumer_key", $this->dbh);
697 if ($rv === FALSE) {
698 return NULL;
699 }
700 $obj = unserialize($rv);
701 if (!($obj instanceof OAuthConsumer)) {
702 return NULL;
703 }
704 return $obj;
705 }/*}}}*/
706
707 function lookup_token($consumer, $token_type, $token) {/*{{{*/
708 $rv = dba_fetch("${token_type}_${token}", $this->dbh);
709 if ($rv === FALSE) {
710 return NULL;
711 }
712 $obj = unserialize($rv);
713 if (!($obj instanceof OAuthToken)) {
714 return NULL;
715 }
716 return $obj;
717 }/*}}}*/
718
719 function lookup_nonce($consumer, $token, $nonce, $timestamp) {/*{{{*/
720 if (dba_exists("nonce_$nonce", $this->dbh)) {
721 return TRUE;
722 } else {
723 dba_insert("nonce_$nonce", "1", $this->dbh);
724 return FALSE;
725 }
726 }/*}}}*/
727
728 function new_token($consumer, $type="request") {/*{{{*/
729 $key = md5(time());
730 $secret = time() + time();
731 $token = new OAuthToken($key, md5(md5($secret)));
732 if (!dba_insert("${type}_$key", serialize($token), $this->dbh)) {
733 throw new OAuthException("doooom!");
734 }
735 return $token;
736 }/*}}}*/
737
738 function new_request_token($consumer) {/*{{{*/
739 return $this->new_token($consumer, "request");
740 }/*}}}*/
741
742 function new_access_token($token, $consumer) {/*{{{*/
743
744 $token = $this->new_token($consumer, 'access');
745 dba_delete("request_" . $token->key, $this->dbh);
746 return $token;
747 }/*}}}*/
748}/*}}}*/
749
750class OAuthUtil {/*{{{*/
751 public static function urlencode_rfc3986($input) {/*{{{*/
752 if (is_array($input)) {
753 return array_map(array('OAuthUtil','urlencode_rfc3986'), $input);
754 } else if (is_scalar($input)) {
755 return str_replace('+', ' ',
756 str_replace('%7E', '~', rawurlencode($input)));
757 } else {
758 return '';
759 }
760 }/*}}}*/
761
762
763 // This decode function isn't taking into consideration the above
764 // modifications to the encoding process. However, this method doesn't
765 // seem to be used anywhere so leaving it as is.
766 public static function urldecode_rfc3986($string) {/*{{{*/
767 return rawurldecode($string);
768 }/*}}}*/
769}/*}}}*/