summaryrefslogtreecommitdiff
path: root/actions/userauthorization.php
blob: ecaa33167ae48b2798b1cbd5e0b54165b13f203e (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
<?php
/*
 * Laconica - a distributed open-source microblogging tool
 * Copyright (C) 2008, Controlez-Vous, Inc.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

if (!defined('LACONICA')) { exit(1); }

require_once(INSTALLDIR.'/lib/omb.php');
define('TIMESTAMP_THRESHOLD', 300);

class UserauthorizationAction extends Action {

    function handle($args)
    {
        parent::handle($args);

        if ($_SERVER['REQUEST_METHOD'] == 'POST') {
            # CSRF protection
            $token = $this->trimmed('token');
            if (!$token || $token != common_session_token()) {
                $req = $this->get_stored_request();
                $this->show_form(_('There was a problem with your session token. Try again, please.'), $req);
                return;
            }
            # We've shown the form, now post user's choice
            $this->send_authorization();
        } else {
            if (!common_logged_in()) {
                # Go log in, and then come back
                common_debug('saving URL for returnto', __FILE__);
                common_set_returnto($_SERVER['REQUEST_URI']);

                common_debug('redirecting to login', __FILE__);
                common_redirect(common_local_url('login'));
                return;
            }
            try {
                # this must be a new request
                common_debug('getting new request', __FILE__);
                $req = $this->get_new_request();
                if (!$req) {
                    $this->client_error(_('No request found!'));
                }
                common_debug('validating request', __FILE__);
                # XXX: only validate new requests, since nonce is one-time use
                $this->validate_request($req);
                common_debug('showing form', __FILE__);
                $this->store_request($req);
                $this->show_form($req);
            } catch (OAuthException $e) {
                $this->clear_request();
                $this->client_error($e->getMessage());
                return;
            }

        }
    }

    function show_form($req)
    {

        $nickname = $req->get_parameter('omb_listenee_nickname');
        $profile = $req->get_parameter('omb_listenee_profile');
        $license = $req->get_parameter('omb_listenee_license');
        $fullname = $req->get_parameter('omb_listenee_fullname');
        $homepage = $req->get_parameter('omb_listenee_homepage');
        $bio = $req->get_parameter('omb_listenee_bio');
        $location = $req->get_parameter('omb_listenee_location');
        $avatar = $req->get_parameter('omb_listenee_avatar');

        common_show_header(_('Authorize subscription'));
        common_element('p', null, _('Please check these details to make sure '.
                                     'that you want to subscribe to this user\'s notices. '.
                                     'If you didn\'t just ask to subscribe to someone\'s notices, '.
                                     'click "Cancel".'));
        common_element_start('div', 'profile');
        if ($avatar) {
            common_element('img', array('src' => $avatar,
                                        'class' => 'avatar profile',
                                        'width' => AVATAR_PROFILE_SIZE,
                                        'height' => AVATAR_PROFILE_SIZE,
                                        'alt' => $nickname));
        }
        common_element('a', array('href' => $profile,
                                  'class' => 'external profile nickname'),
                       $nickname);
        if ($fullname) {
            common_element_start('div', 'fullname');
            if ($homepage) {
                common_element('a', array('href' => $homepage),
                               $fullname);
            } else {
                common_text($fullname);
            }
            common_element_end('div');
        }
        if ($location) {
            common_element('div', 'location', $location);
        }
        if ($bio) {
            common_element('div', 'bio', $bio);
        }
        common_element_start('div', 'license');
        common_element('a', array('href' => $license,
                                  'class' => 'license'),
                       $license);
        common_element_end('div');
        common_element_end('div');
        common_element_start('form', array('method' => 'post',
                                           'id' => 'userauthorization',
                                           'name' => 'userauthorization',
                                           'action' => common_local_url('userauthorization')));
        common_hidden('token', common_session_token());
        common_submit('accept', _('Accept'));
        common_submit('reject', _('Reject'));
        common_element_end('form');
        common_show_footer();
    }

    function send_authorization()
    {
        $req = $this->get_stored_request();

        if (!$req) {
            common_user_error(_('No authorization request!'));
            return;
        }

        $callback = $req->get_parameter('oauth_callback');

        if ($this->arg('accept')) {
            if (!$this->authorize_token($req)) {
                $this->client_error(_('Error authorizing token'));
            }
            if (!$this->save_remote_profile($req)) {
                $this->client_error(_('Error saving remote profile'));
            }
            if (!$callback) {
                $this->show_accept_message($req->get_parameter('oauth_token'));
            } else {
                $params = array();
                $params['oauth_token'] = $req->get_parameter('oauth_token');
                $params['omb_version'] = OMB_VERSION_01;
                $user = User::staticGet('uri', $req->get_parameter('omb_listener'));
                $profile = $user->getProfile();
                if (!$profile) {
                    common_log_db_error($user, 'SELECT', __FILE__);
                    $this->server_error(_('User without matching profile'));
                    return;
                }
                $params['omb_listener_nickname'] = $user->nickname;
                $params['omb_listener_profile'] = common_local_url('showstream',
                                                                   array('nickname' => $user->nickname));
                if ($profile->fullname) {
                    $params['omb_listener_fullname'] = $profile->fullname;
                }
                if ($profile->homepage) {
                    $params['omb_listener_homepage'] = $profile->homepage;
                }
                if ($profile->bio) {
                    $params['omb_listener_bio'] = $profile->bio;
                }
                if ($profile->location) {
                    $params['omb_listener_location'] = $profile->location;
                }
                $avatar = $profile->getAvatar(AVATAR_PROFILE_SIZE);
                if ($avatar) {
                    $params['omb_listener_avatar'] = $avatar->url;
                }
                $parts = array();
                foreach ($params as $k => $v) {
                    $parts[] = $k . '=' . OAuthUtil::urlencodeRFC3986($v);
                }
                $query_string = implode('&', $parts);
                $parsed = parse_url($callback);
                $url = $callback . (($parsed['query']) ? '&' : '?') . $query_string;
                common_redirect($url, 303);
            }
        } else {
            if (!$callback) {
                $this->show_reject_message();
            } else {
                # XXX: not 100% sure how to signal failure... just redirect without token?
                common_redirect($callback, 303);
            }
        }
    }

    function authorize_token(&$req)
    {
        $consumer_key = $req->get_parameter('oauth_consumer_key');
        $token_field = $req->get_parameter('oauth_token');
        common_debug('consumer key = "'.$consumer_key.'"', __FILE__);
        common_debug('token field = "'.$token_field.'"', __FILE__);
        $rt = new Token();
        $rt->consumer_key = $consumer_key;
        $rt->tok = $token_field;
        $rt->type = 0;
        $rt->state = 0;
        common_debug('request token to look up: "'.print_r($rt,TRUE).'"');
        if ($rt->find(true)) {
            common_debug('found request token to authorize', __FILE__);
            $orig_rt = clone($rt);
            $rt->state = 1; # Authorized but not used
            if ($rt->update($orig_rt)) {
                common_debug('updated request token so it is authorized', __FILE__);
                return true;
            }
        }
        return FALSE;
    }

    # XXX: refactor with similar code in finishremotesubscribe.php

    function save_remote_profile(&$req)
    {
        # FIXME: we should really do this when the consumer comes
        # back for an access token. If they never do, we've got stuff in a
        # weird state.

        $nickname = $req->get_parameter('omb_listenee_nickname');
        $fullname = $req->get_parameter('omb_listenee_fullname');
        $profile_url = $req->get_parameter('omb_listenee_profile');
        $homepage = $req->get_parameter('omb_listenee_homepage');
        $bio = $req->get_parameter('omb_listenee_bio');
        $location = $req->get_parameter('omb_listenee_location');
        $avatar_url = $req->get_parameter('omb_listenee_avatar');

        $listenee = $req->get_parameter('omb_listenee');
        $remote = Remote_profile::staticGet('uri', $listenee);

        if ($remote) {
            $exists = true;
            $profile = Profile::staticGet($remote->id);
            $orig_remote = clone($remote);
            $orig_profile = clone($profile);
        } else {
            $exists = false;
            $remote = new Remote_profile();
            $remote->uri = $listenee;
            $profile = new Profile();
        }

        $profile->nickname = $nickname;
        $profile->profileurl = $profile_url;

        if ($fullname) {
            $profile->fullname = $fullname;
        }
        if ($homepage) {
            $profile->homepage = $homepage;
        }
        if ($bio) {
            $profile->bio = $bio;
        }
        if ($location) {
            $profile->location = $location;
        }

        if ($exists) {
            $profile->update($orig_profile);
        } else {
            $profile->created = DB_DataObject_Cast::dateTime(); # current time
            $id = $profile->insert();
            if (!$id) {
                return FALSE;
            }
            $remote->id = $id;
        }

        if ($exists) {
            if (!$remote->update($orig_remote)) {
                return FALSE;
            }
        } else {
            $remote->created = DB_DataObject_Cast::dateTime(); # current time
            if (!$remote->insert()) {
                return FALSE;
            }
        }

        if ($avatar_url) {
            if (!$this->add_avatar($profile, $avatar_url)) {
                return FALSE;
            }
        }

        $user = common_current_user();
        $datastore = omb_oauth_datastore();
        $consumer = $this->get_consumer($datastore, $req);
        $token = $this->get_token($datastore, $req, $consumer);

        $sub = new Subscription();
        $sub->subscriber = $user->id;
        $sub->subscribed = $remote->id;
        $sub->token = $token->key; # NOTE: request token, not valid for use!
        $sub->created = DB_DataObject_Cast::dateTime(); # current time

        if (!$sub->insert()) {
            return FALSE;
        }

        return TRUE;
    }

    function add_avatar($profile, $url)
    {
        $temp_filename = tempnam(sys_get_temp_dir(), 'listenee_avatar');
        copy($url, $temp_filename);
        return $profile->setOriginal($temp_filename);
    }

    function show_accept_message($tok)
    {
        common_show_header(_('Subscription authorized'));
        common_element('p', null,
                       _('The subscription has been authorized, but no '.
                          'callback URL was passed. Check with the site\'s instructions for '.
                          'details on how to authorize the subscription. Your subscription token is:'));
        common_element('blockquote', 'token', $tok);
        common_show_footer();
    }

    function show_reject_message($tok)
    {
        common_show_header(_('Subscription rejected'));
        common_element('p', null,
                       _('The subscription has been rejected, but no '.
                          'callback URL was passed. Check with the site\'s instructions for '.
                          'details on how to fully reject the subscription.'));
        common_show_footer();
    }

    function store_request($req)
    {
        common_ensure_session();
        $_SESSION['userauthorizationrequest'] = $req;
    }

    function clear_request()
    {
        common_ensure_session();
        unset($_SESSION['userauthorizationrequest']);
    }

    function get_stored_request()
    {
        common_ensure_session();
        $req = $_SESSION['userauthorizationrequest'];
        return $req;
    }

    function get_new_request()
    {
        common_remove_magic_from_request();
        $req = OAuthRequest::from_request();
        return $req;
    }

    # Throws an OAuthException if anything goes wrong

    function validate_request(&$req)
    {
        # OAuth stuff -- have to copy from OAuth.php since they're
        # all private methods, and there's no user-authentication method
        common_debug('checking version', __FILE__);
        $this->check_version($req);
        common_debug('getting datastore', __FILE__);
        $datastore = omb_oauth_datastore();
        common_debug('getting consumer', __FILE__);
        $consumer = $this->get_consumer($datastore, $req);
        common_debug('getting token', __FILE__);
        $token = $this->get_token($datastore, $req, $consumer);
        common_debug('checking timestamp', __FILE__);
        $this->check_timestamp($req);
        common_debug('checking nonce', __FILE__);
        $this->check_nonce($datastore, $req, $consumer, $token);
        common_debug('checking signature', __FILE__);
        $this->check_signature($req, $consumer, $token);
        common_debug('validating omb stuff', __FILE__);
        $this->validate_omb($req);
        common_debug('done validating', __FILE__);
        return true;
    }

    function validate_omb(&$req)
    {
        foreach (array('omb_version', 'omb_listener', 'omb_listenee',
                       'omb_listenee_profile', 'omb_listenee_nickname',
                       'omb_listenee_license') as $param)
        {
            if (!$req->get_parameter($param)) {
                throw new OAuthException("Required parameter '$param' not found");
            }
        }
        # Now, OMB stuff
        $version = $req->get_parameter('omb_version');
        if ($version != OMB_VERSION_01) {
            throw new OAuthException("OpenMicroBlogging version '$version' not supported");
        }
        $listener =    $req->get_parameter('omb_listener');
        $user = User::staticGet('uri', $listener);
        if (!$user) {
            throw new OAuthException("Listener URI '$listener' not found here");
        }
        $cur = common_current_user();
        if ($cur->id != $user->id) {
            throw new OAuthException("Can't add for another user!");
        }
        $listenee = $req->get_parameter('omb_listenee');
        if (!Validate::uri($listenee) &&
            !common_valid_tag($listenee)) {
            throw new OAuthException("Listenee URI '$listenee' not a recognizable URI");
        }
        if (strlen($listenee) > 255) {
            throw new OAuthException("Listenee URI '$listenee' too long");
        }

        $other = User::staticGet('uri', $listenee);
        if ($other) {
            throw new OAuthException("Listenee URI '$listenee' is local user");
        }

        $remote = Remote_profile::staticGet('uri', $listenee);
        if ($remote) {
            $sub = new Subscription();
            $sub->subscriber = $user->id;
            $sub->subscribed = $remote->id;
            if ($sub->find(TRUE)) {
                throw new OAuthException("Already subscribed to user!");
            }
        }
        $nickname = $req->get_parameter('omb_listenee_nickname');
        if (!Validate::string($nickname, array('min_length' => 1,
                                               'max_length' => 64,
                                               'format' => VALIDATE_NUM . VALIDATE_ALPHA_LOWER))) {
            throw new OAuthException('Nickname must have only letters and numbers and no spaces.');
        }
        $profile = $req->get_parameter('omb_listenee_profile');
        if (!common_valid_http_url($profile)) {
            throw new OAuthException("Invalid profile URL '$profile'.");
        }

        if ($profile == common_local_url('showstream', array('nickname' => $nickname))) {
            throw new OAuthException("Profile URL '$profile' is for a local user.");
        }

        $license = $req->get_parameter('omb_listenee_license');
        if (!common_valid_http_url($license)) {
            throw new OAuthException("Invalid license URL '$license'.");
        }
        $site_license = common_config('license', 'url');
        if (!common_compatible_license($license, $site_license)) {
            throw new OAuthException("Listenee stream license '$license' not compatible with site license '$site_license'.");
        }
        # optional stuff
        $fullname = $req->get_parameter('omb_listenee_fullname');
        if ($fullname && strlen($fullname) > 255) {
            throw new OAuthException("Full name '$fullname' too long.");
        }
        $homepage = $req->get_parameter('omb_listenee_homepage');
        if ($homepage && (!common_valid_http_url($homepage) || strlen($homepage) > 255)) {
            throw new OAuthException("Invalid homepage '$homepage'");
        }
        $bio = $req->get_parameter('omb_listenee_bio');
        if ($bio && strlen($bio) > 140) {
            throw new OAuthException("Bio too long '$bio'");
        }
        $location = $req->get_parameter('omb_listenee_location');
        if ($location && strlen($location) > 255) {
            throw new OAuthException("Location too long '$location'");
        }
        $avatar = $req->get_parameter('omb_listenee_avatar');
        if ($avatar) {
            if (!common_valid_http_url($avatar) || strlen($avatar) > 255) {
                throw new OAuthException("Invalid avatar URL '$avatar'");
            }
            $size = @getimagesize($avatar);
            if (!$size) {
                throw new OAuthException("Can't read avatar URL '$avatar'");
            }
            if ($size[0] != AVATAR_PROFILE_SIZE || $size[1] != AVATAR_PROFILE_SIZE) {
                throw new OAuthException("Wrong size image at '$avatar'");
            }
            if (!in_array($size[2], array(IMAGETYPE_GIF, IMAGETYPE_JPEG,
                                          IMAGETYPE_PNG))) {
                throw new OAuthException("Wrong image type for '$avatar'");
            }
        }
        $callback = $req->get_parameter('oauth_callback');
        if ($callback && !common_valid_http_url($callback)) {
            throw new OAuthException("Invalid callback URL '$callback'");
        }
        if ($callback && $callback == common_local_url('finishremotesubscribe')) {
            throw new OAuthException("Callback URL '$callback' is for local site.");
        }
    }

    # Snagged from OAuthServer

    function check_version(&$req)
    {
        $version = $req->get_parameter("oauth_version");
        if (!$version) {
            $version = 1.0;
        }
        if ($version != 1.0) {
            throw new OAuthException("OAuth version '$version' not supported");
        }
        return $version;
    }

    # Snagged from OAuthServer

    function get_consumer($datastore, $req)
    {
        $consumer_key = @$req->get_parameter("oauth_consumer_key");
        if (!$consumer_key) {
            throw new OAuthException("Invalid consumer key");
        }

        $consumer = $datastore->lookup_consumer($consumer_key);
        if (!$consumer) {
            throw new OAuthException("Invalid consumer");
        }
        return $consumer;
    }

    # Mostly cadged from OAuthServer

    function get_token($datastore, &$req, $consumer)
    {/*{{{*/
        $token_field = @$req->get_parameter('oauth_token');
        $token = $datastore->lookup_token($consumer, 'request', $token_field);
        if (!$token) {
            throw new OAuthException("Invalid $token_type token: $token_field");
        }
        return $token;
    }

    function check_timestamp(&$req)
    {
        $timestamp = @$req->get_parameter('oauth_timestamp');
        $now = time();
        if ($now - $timestamp > TIMESTAMP_THRESHOLD) {
            throw new OAuthException("Expired timestamp, yours $timestamp, ours $now");
        }
    }

    # NOTE: don't call twice on the same request; will fail!
    function check_nonce(&$datastore, &$req, $consumer, $token)
    {
        $timestamp = @$req->get_parameter('oauth_timestamp');
        $nonce = @$req->get_parameter('oauth_nonce');
        $found = $datastore->lookup_nonce($consumer, $token, $nonce, $timestamp);
        if ($found) {
            throw new OAuthException("Nonce already used");
        }
        return true;
    }

    function check_signature(&$req, $consumer, $token)
    {
        $signature_method = $this->get_signature_method($req);
        $signature = $req->get_parameter('oauth_signature');
        $valid_sig = $signature_method->check_signature($req,
                                                        $consumer,
                                                        $token,
                                                        $signature);
        if (!$valid_sig) {
            throw new OAuthException("Invalid signature");
        }
    }

    function get_signature_method(&$req)
    {
        $signature_method = @$req->get_parameter("oauth_signature_method");
        if (!$signature_method) {
            $signature_method = "PLAINTEXT";
        }
        if ($signature_method != 'HMAC-SHA1') {
            throw new OAuthException("Signature method '$signature_method' not supported.");
        }
        return omb_hmac_sha1();
    }
}