-
Notifications
You must be signed in to change notification settings - Fork 5
/
engine.php
2038 lines (1630 loc) · 54 KB
/
engine.php
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
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
<?php
// PLEASE DO NOT EDIT THIS FILE UNLESS YOU KNOW WHAT YOU ARE DOING!
/**
* OpenID-LDAP-PHP
* An open source PHP-based OpenID IdP package using LDAP as backend.
*
* By Zdravko Stoychev <zdravko (at) 5group (dot) com> aka Dako.
* Copyright 1996-2011 by 5Group & Co. http://www.5group.com/
* See LICENSE file for more details.
*/
/**
* Set a constant to indicate that phpMyID is running
*/
define('PHPMYID_STARTED', true);
/**
* List the known types and modes
* @name $known
* @global array $GLOBALS['known']
*/
$GLOBALS['known'] = array(
'assoc_types' => array('HMAC-SHA1'),
'openid_modes' => array('accept',
'associate',
'authorize',
'cancel',
'checkid_immediate',
'checkid_setup',
'check_authentication',
'error',
'id_res',
'login',
'logout',
'sendsreg',
'sb_status',
'sb_config',
'test'),
'session_types' => array('',
'DH-SHA1'),
'bigmath_types' => array('DH-SHA1'),
);
/**
* Defined by OpenID spec
* @name $g
* @global integer $GLOBALS['g']
*/
$GLOBALS['g'] = 2;
/**
* Defined by OpenID spec
* @name $p
* @global integer $GLOBALS['p']
*/
$GLOBALS['p'] = '155172898181473697471232257763715539915724801966915404479707' .
'7953140576293785419175806512274236981889937278161526466314385615958256881888' .
'8995127215884267541995034125870655654980358010487053768147672651325574704076' .
'5857479291291572334510643245094715007229621094194349783925984760375594985848' .
'253359305585439638443';
// Runmode functions
/**
* Allow the user to accept trust on a URL
* @global array $profile
*/
function accept_mode () {
global $profile;
// this is a user session
user_session();
// the user needs refresh urls in their session to access this mode
if (! isset($_SESSION['post_accept_url']) || ! isset($_SESSION['cancel_accept_url']) || ! isset($_SESSION['unaccepted_url']))
error_500('You may not access this mode directly.');
// has the user accepted the trust_root?
$accepted = @strlen($_REQUEST['accepted'])
? $_REQUEST['accepted']
: null;
// if so, refresh back to post_accept_url
if ($accepted === 'yes') {
$_SESSION['accepted_url'] = $_SESSION['unaccepted_url'];
wrap_refresh($_SESSION['post_accept_url']);
// if they rejected it, return to the client
} elseif ($accepted === 'no') {
wrap_refresh($_SESSION['cancel_accept_url']);
}
// if neither, offer the trust request
$yes = wrap_param($profile['req_url'],'accepted=yes');
$no = wrap_param($profile['req_url'],'accepted=no');
wrap_html('The client site you are attempting to log into has requested that you trust the following URL:<br/><b>' . $_SESSION['unaccepted_url'] . '</b><br/><br/>Do you wish to continue?<br/><a href="' . $yes . '">Yes</a> | <a href="' . $no . '">No</a>');
}
/**
* Allow the user to accept sending of a SREG
* @global array $profile
*/
function sendsreg_mode () {
global $profile, $sreg;
// this is a user session
user_session();
// the user needs refresh urls in their session to access this mode
if (! isset($_SESSION['post_accept_url']) || ! isset($_SESSION['cancel_accept_url']) || ! isset($_SESSION['unaccepted_sreg']))
error_500('You may not access this mode directly.');
// has the user accepted the trust_root?
$accepted = @strlen($_REQUEST['allowed'])
? $_REQUEST['allowed']
: null;
// if so, refresh back to post_accept_url
if ($accepted === 'yes') {
$_SESSION['accepted_sreg'] = $_SESSION['unaccepted_sreg'];
wrap_refresh($_SESSION['post_accept_url']);
// if they rejected it, return to the client
} elseif ($accepted === 'no') {
wrap_refresh($_SESSION['cancel_accept_url']);
}
// if neither, offer the trust request
$yes = wrap_param($profile['req_url'],'allowed=yes');
$no = wrap_param($profile['req_url'],'allowed=no');
$sregs = $_SESSION['unaccepted_sreg'];
// Add the sreg stuff, if we've got it
$tokens = '';
foreach (explode(',', $sregs) as $key) {
if (! isset($sreg[$key]))
continue;
$tokens .= sprintf("<tr><td>%s:</td><td>%s</td></tr>", $key, $sreg[$key]);
}
if ($tokens != "")
$tokens = sprintf('<table bgcolor=#E9E8E7><tr><td colspan="2" align="center"><font color="green">Registration info details</font></td></tr>%s</table>',$tokens);
wrap_html('The client site you just have logged into has requested that you provide a registration info:<br/><b>' . $_SESSION['unaccepted_url'] . '</b><br/>' . $tokens . '<br/>Do you allow the transfer?<br/><a href="' . $yes . '">Yes</a> | <a href="' . $no . '">No</a>');
}
/**
* Produce SeatBelt Login State XML if they are logged in or not
* @global array $profile
*/
function sb_status_mode () {
global $profile;
user_session();
if ($profile['authorized']) {
// output XML with active username
wrap_seatbelt_status($_SESSION['auth_username']);
} else {
// output XML as no user has logged in
wrap_seatbelt_status();
}
}
/**
* Return SeatBelt configuration XML
* @global array $profile
*/
function sb_config_mode () {
wrap_seatbelt_config();
}
/**
* Perform an association with a consumer
* @global array $known
* @global array $profile
* @global integer $g
* @global integer $p
*/
function associate_mode () {
global $g, $known, $p, $profile;
// Validate the request
if (! isset($_REQUEST['openid_mode']) || $_REQUEST['openid_mode'] != 'associate')
error_400();
// Get the request options, using defaults as necessary
$assoc_type = (@strlen($_REQUEST['openid_assoc_type'])
&& in_array($_REQUEST['openid_assoc_type'], $known['assoc_types']))
? $_REQUEST['openid_assoc_type']
: 'HMAC-SHA1';
$session_type = (@strlen($_REQUEST['openid_session_type'])
&& in_array($_REQUEST['openid_session_type'], $known['session_types']))
? $_REQUEST['openid_session_type']
: '';
$dh_modulus = (@strlen($_REQUEST['openid_dh_modulus']))
? long(base64_decode($_REQUEST['openid_dh_modulus']))
: ($session_type == 'DH-SHA1'
? $p
: null);
$dh_gen = (@strlen($_REQUEST['openid_dh_gen']))
? long(base64_decode($_REQUEST['openid_dh_gen']))
: ($session_type == 'DH-SHA1'
? $g
: null);
$dh_consumer_public = (@strlen($_REQUEST['openid_dh_consumer_public']))
? $_REQUEST['openid_dh_consumer_public']
: ($session_type == 'DH-SHA1'
? error_post('dh_consumer_public was not specified')
: null);
$lifetime = time() + $profile['lifetime'];
// Create standard keys
$keys = array(
'assoc_type' => $assoc_type,
'expires_in' => $profile['lifetime']
);
// If I can't handle bigmath, default to plaintext sessions
if (in_array($session_type, $known['bigmath_types']) && $profile['use_bigmath'] == false)
$session_type = null;
// Add response keys based on the session type
switch ($session_type) {
case 'DH-SHA1':
// Create the associate id and shared secret now
list ($assoc_handle, $shared_secret) = new_assoc($lifetime);
// Compute the Diffie-Hellman stuff
$private_key = random($dh_modulus);
$public_key = bmpowmod($dh_gen, $private_key, $dh_modulus);
$remote_key = long(base64_decode($dh_consumer_public));
$ss = bmpowmod($remote_key, $private_key, $dh_modulus);
$keys['assoc_handle'] = $assoc_handle;
$keys['session_type'] = $session_type;
$keys['dh_server_public'] = base64_encode(bin($public_key));
$keys['enc_mac_key'] = base64_encode(x_or(sha1_20(bin($ss)), $shared_secret));
break;
default:
// Create the associate id and shared secret now
list ($assoc_handle, $shared_secret) = new_assoc($lifetime);
$keys['assoc_handle'] = $assoc_handle;
$keys['mac_key'] = base64_encode($shared_secret);
}
// Return the keys
wrap_kv($keys);
}
/**
* Perform a user authorization
* @global array $profile
*/
function authorize_mode () {
global $profile, $proto;
// this is a user session
user_session();
// the user needs refresh urls in their session to access this mode
if (! isset($_SESSION['post_auth_url']) || ! isset($_SESSION['cancel_auth_url']))
error_500('You may not access this mode directly.');
if (! $profile['user_found']) {
$c = wrap_param($_SESSION['cancel_auth_url'],'openid.mode=cancel');
wrap_html('This user does not exists! | <a href="' . $c . '">Cancel</a>');
}
// try to get the auth headers
if (function_exists('apache_request_headers') && ini_get('safe_mode') == false) {
$arh = apache_request_headers();
$hdr = isset($arh['Authorization']) ? $arh['Authorization'] : null;
} elseif (isset($_SERVER['PHP_AUTH_DIGEST'])) {
$hdr = $_SERVER['PHP_AUTH_DIGEST'];
} elseif (isset($_SERVER['HTTP_AUTHORIZATION'])) {
$hdr = $_SERVER['HTTP_AUTHORIZATION'];
} elseif (isset($_ENV['PHP_AUTH_DIGEST'])) {
$hdr = $_ENV['PHP_AUTH_DIGEST'];
} elseif (isset($_SERVER['Authorization'])) {
$hdr = $_SERVER['Authorization'];
} elseif (isset($_REQUEST['auth'])) {
$hdr = stripslashes(urldecode($_REQUEST['auth']));
} else {
$hdr = null;
}
debug('Authorization header: ' . $hdr);
$myauth = substr($hdr,0,6) == 'Basic '
? substr($hdr, strpos($hdr, ' ') + 1)
: $hdr;
// is the user trying to log in?
if ($proto == "https" && ! is_null($myauth) && $profile['authorized'] == false) {
debug('Basic headers: ' . $myauth);
$hdr = array();
// decode the Basic authorization headers
// base64-encoded concatenation of the username, a colon, and the password
$myauth = base64_decode($myauth);
$hdr['username'] = substr($myauth, 0, strpos($myauth, ':'));
$hdr['password'] = substr($myauth, strpos($myauth, ':') + 1);
if ( isset($_SERVER["REMOTE_ADDR"]) ) {
$hdr['clientip'] = $_SERVER["REMOTE_ADDR"];
} elseif ( isset($_SERVER["HTTP_X_FORWARDED_FOR"]) ) {
$hdr['clientip'] = $_SERVER["HTTP_X_FORWARDED_FOR"];
} elseif ( isset($_SERVER["HTTP_CLIENT_IP"]) ) {
$hdr['clientip'] = $_SERVER["HTTP_CLIENT_IP"];
}
debug($hdr, 'Parsed basic auth headers:');
if (! isset($_SESSION['failures']))
$_SESSION['failures'] = 0;
if (($profile['auth_username'] == $hdr['username']) && ($hdr['password'] != '')) {
$ok = test_ldap($profile['auth_cn'],$hdr['password']);
if ($ok == "ok") {
$hdr['response'] = $ok;
debug('Ldap bind is OK');
} else {
$hdr['response'] = "failed";
debug('Ldap bind FAILED');
}
// successful login!
if ($hdr['response'] == $ok) {
debug('Authentication successful for ' . $hdr['username']);
debug('User session is: ' . session_id());
$_SESSION['auth_username'] = $profile['auth_username'];
$_SESSION['auth_url'] = $profile['idp_url'];
$profile['authorized'] = true;
// return to the refresh url if they get in
wrap_refresh($_SESSION['post_auth_url']);
authlog('Login passed for ' . $hdr['username'] . ' at ' . $hdr['clientip']);
// failed login
} else {
$_SESSION['failures']++;
debug('Login failed for ' . $hdr['username']);
debug('Fail count: ' . $_SESSION['failures']);
authlog('Login FAILED for ' . $hdr['username'] . ' at ' . $hdr['clientip']);
}
} elseif ($profile['auth_username'] == $hdr['username']) {
$_SESSION['failures']++;
debug('Empty password for ' . $hdr['username']);
debug('Fail count: ' . $_SESSION['failures']);
authlog('Login FAILED for ' . $hdr['username'] . ' at ' . $hdr['clientip']);
} else {
$_SESSION['failures']++;
debug('Bad username: ' . $hdr['username']);
debug('Fail count: ' . $_SESSION['failures']);
authlog('Login FAILED for ' . $hdr['username'] . ' at ' . $hdr['clientip']);
}
// does this make too many failures?
if ($_SESSION['failures'] > 4) {
debug('Too many password failures');
error_get($_SESSION['cancel_auth_url'], 'Too many password failures. Double check your authorization realm. You must restart your browser to try again.');
}
} elseif ($proto == "http") {
error_500('You have to use secure connection (https) in order to login.');
}
// if we get this far the user is not authorized, so send the headers
debug('Prompting user to log in.');
header('HTTP/1.0 401 Unauthorized');
header(sprintf('WWW-Authenticate: Basic realm="%s"', $profile['auth_realm']));
wrap_refresh(wrap_param($_SESSION['cancel_auth_url'],'openid.mode=cancel'));
}
/**
* Handle a consumer's request for cancellation.
*/
function cancel_mode () {
wrap_html('Request cancelled.');
}
/**
* Handle a consumer's request to see if the user is authenticated
*/
function check_authentication_mode () {
// Validate the request
if (! isset($_REQUEST['openid_mode']) || $_REQUEST['openid_mode'] != 'check_authentication')
error_400();
$assoc_handle = @strlen($_REQUEST['openid_assoc_handle'])
? $_REQUEST['openid_assoc_handle']
: error_post('Missing assoc_handle');
$sig = @strlen($_REQUEST['openid_sig'])
? $_REQUEST['openid_sig']
: error_post('Missing sig');
$signed = @strlen($_REQUEST['openid_signed'])
? $_REQUEST['openid_signed']
: error_post('Missing signed');
// Prepare the return keys
$keys = array(
'openid.mode' => 'id_res'
);
// Invalidate the assoc handle if we need to
if (@strlen($_REQUEST['openid_invalidate_handle'])) {
destroy_assoc_handle($_REQUEST['openid_invalidate_handle']);
$keys['invalidate_handle'] = $_REQUEST['openid_invalidate_handle'];
}
// Validate the sig by recreating the kv pair and signing
$_REQUEST['openid_mode'] = 'id_res';
$tokens = '';
foreach (explode(',', $signed) as $param) {
$post = preg_replace('/\./', '_', $param);
$tokens .= sprintf("%s:%s\n", $param, $_REQUEST['openid_' . $post]);
}
// Add the sreg stuff, if we've got it
if (isset($sreg_required)) {
foreach (explode(',', $sreg_required) as $key) {
if (! isset($sreg[$key]))
continue;
$skey = 'sreg.' . $key;
$tokens .= sprintf("%s:%s\n", $skey, $sreg[$key]);
$keys[$skey] = $sreg[$key];
$fields[] = $skey;
}
}
// Look up the consumer's shared_secret and timeout
list ($shared_secret, $expires) = secret($assoc_handle);
// if I can't verify the assoc_handle, or if it's expired
if ($shared_secret == false || (is_numeric($expires) && $expires < time())) {
$keys['is_valid'] = 'false';
} else {
$ok = base64_encode(hmac($shared_secret, $tokens));
$keys['is_valid'] = ($sig == $ok) ? 'true' : 'false';
}
$keys['ns'] = 'http://specs.openid.net/auth/2.0';
// Return the keys
wrap_kv($keys);
}
/**
* Handle a consumer's request to see if the end user is logged in
* @global array $known
* @global array $profile
* @global array $sreg
*/
function checkid ( $wait ) {
debug("checkid: wait? $wait");
global $known, $profile, $sreg;
// This is a user session
user_session();
// Get the options, use defaults as necessary
$return_to = @strlen($_REQUEST['openid_return_to'])
? $_REQUEST['openid_return_to']
: error_400('Missing return_to');
$identity = @strlen($_REQUEST['openid_identity'])
? $_REQUEST['openid_identity']
: error_get($return_to, 'Missing identity');
$assoc_handle = @strlen($_REQUEST['openid_assoc_handle'])
? $_REQUEST['openid_assoc_handle']
: null;
$trust_root = @strlen($_REQUEST['openid_trust_root'])
? $_REQUEST['openid_trust_root']
: $return_to;
$sreg_required = @strlen($_REQUEST['openid_sreg_required'])
? $_REQUEST['openid_sreg_required']
: '';
$sreg_optional = @strlen($_REQUEST['openid_sreg_optional'])
? $_REQUEST['openid_sreg_optional']
: '';
// determine the cancel url
$cancel_url = wrap_param($return_to,'openid.mode=cancel');
// required and optional make no difference to us
$sreg_required .= ',' . $sreg_optional;
// do the trust_root analysis
if ($trust_root != $return_to) {
// the urls are not the same, be sure return decends from trust
if (! url_descends($return_to, $trust_root))
error_500('Invalid trust_root: "' . $trust_root . '"');
}
// transfer the user to the url accept mode if they're paranoid
if ($wait == 1 && isset($profile['paranoid']) && $profile['paranoid'] == true && (! isset($_SESSION['accepted_url']) || $_SESSION['accepted_url'] != $trust_root)) {
$_SESSION['cancel_accept_url'] = $cancel_url;
$_SESSION['post_accept_url'] = $profile['req_url'];
$_SESSION['unaccepted_url'] = $trust_root;
debug('Transferring to acceptance mode.');
debug('Cancel URL: ' . $_SESSION['cancel_accept_url']);
debug('Post URL: ' . $_SESSION['post_accept_url']);
wrap_refresh(wrap_param($profile['idp_url'],'openid.mode=accept'));
}
$requested_identity = $identity;
// make sure i am this identifier
if ($identity != $profile['idp_url']) {
// If mismatch is only in protocol, ignore
if ($profile['smart_ssl'] && substr($identity, strpos($identity, ':') + 1) ==
substr($profile['idp_url'], strpos($profile['idp_url'], ':') + 1)) {
$identity = $profile['idp_url'];
} else {
debug("Invalid identity: $identity");
debug("IdP URL: " . $profile['idp_url']);
error_get($return_to, "Invalid identity: '$identity' expected {$profile['idp_url']}");
}
}
// begin setting up return keys
$keys = array(
'mode' => 'id_res'
);
// if the user is not logged in, transfer to the authorization mode
if ($profile['authorized'] == false || $identity != $_SESSION['auth_url']) {
// users can only be logged in to one url at a time
$_SESSION['auth_username'] = null;
$_SESSION['auth_url'] = null;
if ($wait) {
$_SESSION['cancel_auth_url'] = $cancel_url;
$_SESSION['post_auth_url'] = $profile['req_url'];
debug('Transferring to authorization mode.');
debug('Cancel URL: ' . $_SESSION['cancel_auth_url']);
debug('Post URL: ' . $_SESSION['post_auth_url']);
wrap_refresh(wrap_param($profile['idp_url'],'openid.mode=authorize'));
} else {
$keys['user_setup_url'] = $profile['idp_url'];
}
// the user is logged in
} else {
// transfer the user to the sreg accept mode if they're paranoid
if ($profile['paranoid'] == true && $sreg_required != "," && (! isset($_SESSION['accepted_sreg']) || $_SESSION['accepted_sreg'] != $sreg_required)) {
$_SESSION['cancel_accept_url'] = wrap_param($return_to,'openid.mode=cancel');
$_SESSION['post_accept_url'] = $profile['req_url'];
$_SESSION['unaccepted_sreg'] = $sreg_required;
debug('Transferring to sreg acceptance mode.');
debug('Cancel URL: ' . $_SESSION['cancel_accept_url']);
debug('Post URL: ' . $_SESSION['post_accept_url']);
debug('SREG fields: ' . $_SESSION['unaccepted_sreg']);
wrap_refresh(wrap_param($profile['idp_url'],'openid.mode=sendsreg'));
}
// remove the refresh URLs if set
unset($_SESSION['cancel_auth_url']);
unset($_SESSION['post_auth_url']);
// check the assoc handle
list($shared_secret, $expires) = secret($assoc_handle);
// if I can't verify the assoc_handle, or if it's expired
if ($shared_secret == false || (is_numeric($expires) && $expires < time())) {
debug("Session expired or missing key: $expires < " . time());
if ($assoc_handle != null) {
$keys['invalidate_handle'] = $assoc_handle;
destroy_assoc_handle($assoc_handle);
}
$lifetime = time() + $profile['lifetime'];
list ($assoc_handle, $shared_secret) = new_assoc($lifetime);
}
$keys['identity'] = $requested_identity;
$keys['assoc_handle'] = $assoc_handle;
$keys['return_to'] = $return_to;
if (isset($_REQUEST['openid_ns'])) {
$keys['response_nonce'] = substr(date('c'), 0, 19) . "Zx";
$keys['op_endpoint'] = $profile['idp_url'];
$keys['claimed_id'] = $requested_identity;
$keys['ns'] = 'http://specs.openid.net/auth/2.0';
}
$fields = array_keys($keys);
$tokens = '';
foreach ($fields as $key)
$tokens .= sprintf("%s:%s\n", $key, $keys[$key]);
// add sreg keys
foreach (explode(',', $sreg_required) as $key) {
if (! isset($sreg[$key]))
continue;
$skey = 'sreg.' . $key;
$tokens .= sprintf("%s:%s\n", $skey, $sreg[$key]);
$keys[$skey] = $sreg[$key];
$fields[] = $skey;
}
$keys['signed'] = implode(',', $fields);
$keys['sig'] = base64_encode(hmac($shared_secret, $tokens));
}
wrap_location($return_to, $keys);
}
/**
* Handle a consumer's request to see if the user is already logged in
*/
function checkid_immediate_mode () {
if (! isset($_REQUEST['openid_mode']) || $_REQUEST['openid_mode'] != 'checkid_immediate')
error_500();
checkid(false);
}
/**
* Handle a consumer's request to see if the user is logged in, but be willing
* to wait for them to perform a login if they're not
*/
function checkid_setup_mode () {
if (! isset($_REQUEST['openid_mode']) || $_REQUEST['openid_mode'] != 'checkid_setup')
error_500();
checkid(true);
}
/**
* Handle errors
*/
function error_mode () {
isset($_REQUEST['openid_error'])
? wrap_html($_REQUEST['openid_error'])
: error_500();
}
/**
* Show a user if they are logged in or not
* @global array $profile
*/
function id_res_mode () {
global $profile;
user_session();
if ($profile['authorized'])
wrap_html('You are logged in as <b>' . $_SESSION['auth_username'] . '</b> | <a href="' . $profile['idp_url'] . '">Continue</a>');
wrap_html('You are not logged in | <a href="' . wrap_param($profile['idp_url'],'openid.mode=login') . '">Login</a>');
}
/**
* Allow a user to perform a static login
* @global array $profile
*/
function login_mode () {
global $profile;
user_session();
if ($profile['authorized'])
id_res_mode();
$keys = array(
'mode' => 'checkid_setup',
'identity' => $profile['idp_url'],
'return_to' => $profile['idp_url']
);
wrap_location($profile['idp_url'], $keys);
}
/**
* Allow a user to perform a static logout
* @global array $profile
*/
function logout_mode () {
global $profile;
user_session();
if (! $profile['authorized'])
wrap_html('You were not logged in');
$_SESSION = array();
session_destroy();
debug('User session destroyed.');
header('HTTP/1.0 401 Unauthorized');
wrap_refresh($profile['idp_url']);
}
/**
* The default information screen
* @global array $profile
*/
function no_mode () {
global $profile, $sreg, $proto, $html, $reldir;
user_session(false);
$demo_name = $proto . '://' . $_SERVER['SERVER_NAME'] . $reldir . 'joe';
$user_name = "";
if (isset($sreg['fullname']) && $sreg['fullname'] !== '') $user_name = $sreg['fullname'];
else if (isset($sreg['nickname'])) $user_name = $sreg['nickname'];
$stat_html = ($profile['authorized'] == true ? ' (<font color="#FB6000">logged in</font>)' : null);
$auth_html = ($profile['authorized'] == false ? ' | <a href="' . wrap_param($profile['idp_url'],'openid.mode=login') . '">Login</a>' : null);
$test_html = ($profile['allow_test'] == true ? ' | <a href="' . wrap_param($profile['idp_url'],'openid.mode=test') . '">Test</a>' : null);
$menu_html = '<a href="' . $proto . '://' . $_SERVER['SERVER_NAME'] . $reldir . '">Home</a>' . $auth_html . $test_html . ' | <a href="http://openid.net/what/">Help</a>';
$name_html = ($profile['user_found'] == true ? 'Welcome, <font color="green">' . $user_name . '</font>! Your OpenID is:<br/><img src="images/openid.gif" border="0" align="top"> <b>' . $profile['idp_url'] . '</b>' . $stat_html . '<br/><br/>Your current options are: ' . $menu_html : '<font color="red">' . sprintf($html['user_not_found'],$profile['auth_username']) . '</font>');
$sign_html = ($profile['auth_username'] != "" ? $name_html : 'Realm: <b>' . $profile['auth_realm'] . '</b><br/><br/>' . sprintf($html['welcome_text'],$demo_name) . '<br/><br/>' . $html['welcome_help']);
wrap_html($sign_html);
}
/**
* Testing for setup
* @global array $profile
*/
function test_mode () {
global $profile, $p, $g;
if ($profile['allow_test'] != true)
error_403();
@ini_set('max_execution_time', 180);
$test_expire = time() + 120;
$test_ss_enc = 'W7hvmld2yEYdDb0fHfSkKhQX+PM=';
$test_ss = base64_decode($test_ss_enc);
$test_token = "alpha:bravo\ncharlie:delta\necho:foxtrot";
$test_server_private = '11263846781670293092494395517924811173145217135753406847875706165886322533899689335716152496005807017390233667003995430954419468996805220211293016296351031812246187748601293733816011832462964410766956326501185504714561648498549481477143603650090931135412673422192550825523386522507656442905243832471167330268';
$test_client_public = base64_decode('AL63zqI5a5p8HdXZF5hFu8p+P9GOb816HcHuvNOhqrgkKdA3fO4XEzmldlb37nv3+xqMBgWj6gxT7vfuFerEZLBvuWyVvR7IOGZmx0BAByoq3fxYd3Fpe2Coxngs015vK37otmH8e83YyyGo5Qua/NAf13yz1PVuJ5Ctk7E+YdVc');
$res = array();
// bcmath
$res['bcmath'] = extension_loaded('bcmath')
? 'pass' : 'warn - not loaded';
// gmp
if ($profile['allow_gmp']) {
$res['gmp'] = extension_loaded('gmp')
? 'pass' : 'warn - not loaded';
} else {
$res['gmp'] = 'pass - n/a';
}
// sys_get_temp_dir
$res['logfile'] = is_writable($profile['logfile'])
? 'pass' : "warn - log is not writable";
// session & new_assoc
user_session();
list($test_assoc, $test_new_ss) = new_assoc($test_expire);
$res['session'] = ($test_assoc != session_id())
? 'pass' : 'fail';
// secret
unset($_SESSION['shared_secret']);
list($check, $check2) = secret($test_assoc);
$res['secret'] = ($check == $test_new_ss)
? 'pass' : 'fail';
// expire
$res['expire'] = ($check2 <= $test_expire)
? 'pass' : 'fail';
// base64
$res['base64'] = (base64_encode($test_ss) == $test_ss_enc)
? 'pass' : 'fail';
// hmac
$test_sig = base64_decode('/VXgHvZAOdoz/OTa5+XJXzSGhjs=');
$check = hmac($test_ss, $test_token);
$res['hmac'] = ($check == $test_sig)
? 'pass' : sprintf("fail - '%s'", base64_encode($check));
if ($profile['use_bigmath']) {
// bigmath powmod
$test_server_public = '102773334773637418574009974502372885384288396853657336911033649141556441102566075470916498748591002884433213640712303846640842555822818660704173387461364443541327856226098159843042567251113889701110175072389560896826887426539315893475252988846151505416694218615764823146765717947374855806613410142231092856731';
$check = bmpowmod($g, $test_server_private, $p);
$res['bmpowmod-1'] = ($check == $test_server_public)
? 'pass' : sprintf("fail - '%s'", $check);
// long
$test_client_long = '133926731803116519408547886573524294471756220428015419404483437186057383311250738749035616354107518232016420809434801736658109316293127101479053449990587221774635063166689561125137927607200322073086097478667514042144489248048756916881344442393090205172004842481037581607299263456852036730858519133859409417564';
$res['long'] = (long($test_client_public) == $test_client_long)
? 'pass' : 'fail';
// bigmath powmod 2
$test_client_share = '19333275433742428703546496981182797556056709274486796259858099992516081822015362253491867310832140733686713353304595602619444380387600756677924791671971324290032515367930532292542300647858206600215875069588627551090223949962823532134061941805446571307168890255137575975911397744471376862555181588554632928402';
$check = bmpowmod($test_client_long, $test_server_private, $p);
$res['bmpowmod-2'] = ($check == $test_client_share)
? 'pass' : sprintf("fail - '%s'", $check);
// bin
$test_client_mac_s1 = base64_decode('G4gQQkYM6QmAzhKbVKSBahFesPL0nL3F2MREVwEtnVRRYI0ifl9zmPklwTcvURt3QTiGBd+9Dn3ESLk5qka6IO5xnILcIoBT8nnGVPiOZvTygfuzKp4tQ2mXuIATJoa7oXRGmBWtlSdFapH5Zt6NJj4B83XF/jzZiRwdYuK4HJI=');
$check = bin($test_client_share);
$res['bin'] = ($check == $test_client_mac_s1)
? 'pass' : sprintf("fail - '%s'", base64_encode($check));
} else {
$res['bigmath'] = 'fail - big math functions are not available.';
}
// sha1_20
$test_client_mac_s1 = base64_decode('G4gQQkYM6QmAzhKbVKSBahFesPL0nL3F2MREVwEtnVRRYI0ifl9zmPklwTcvURt3QTiGBd+9Dn3ESLk5qka6IO5xnILcIoBT8nnGVPiOZvTygfuzKp4tQ2mXuIATJoa7oXRGmBWtlSdFapH5Zt6NJj4B83XF/jzZiRwdYuK4HJI=');
$test_client_mac_s2 = base64_decode('0Mb2t9d/HvAZyuhbARJPYdx3+v4=');
$check = sha1_20($test_client_mac_s1);
$res['sha1_20'] = ($check == $test_client_mac_s2)
? 'pass' : sprintf("fail - '%s'", base64_encode($check));
// x_or
$test_client_mac_s3 = base64_decode('i36ZLYAJ1rYEx1VEHObrS8hgAg0=');
$check = x_or($test_client_mac_s2, $test_ss);
$res['x_or'] = ($check == $test_client_mac_s3)
? 'pass' : sprintf("fail - '%s'", base64_encode($check));
$out = "<table border=1 cellpadding=4>\n";
foreach ($res as $test => $stat) {
$code = substr($stat, 0, 4);
$color = ($code == 'pass') ? '#9f9'
: (($code == 'warn') ? '#ff9' : '#f99');
$out .= sprintf("<tr><th>%s</th><td style='background:%s'>%s</td></tr>\n", $test, $color, $stat);
}
$out .= "</table>";
wrap_html($out);
}
// Support functions
/**
* Prefix the keys of an array with 'openid.'
* @param array $array
* @return array
*/
function append_openid ($array) {
$keys = array_keys($array);
$vals = array_values($array);
$r = array();
for ($i=0; $i<sizeof($keys); $i++)
$r['openid.' . $keys[$i]] = $vals[$i];
return $r;
}
/**
* Create a big math addition function
* @param string $l
* @param string $r
* @return string
* @url http://www.icosaedro.it/bigint Inspired by
*/
function bmadd($l, $r) {
if (function_exists('bcadd'))
return bcadd($l, $r);
global $profile;
if ($profile['use_gmp'])
return gmp_strval(gmp_add($l, $r));
$l = strval($l); $r = strval($r);
$ll = strlen($l); $rl = strlen($r);
if ($ll < $rl) {
$l = str_repeat("0", $rl-$ll) . $l;
$o = $rl;
} elseif ( $ll > $rl ) {
$r = str_repeat("0", $ll-$rl) . $r;
$o = $ll;
} else {
$o = $ll;
}
$v = '';
$carry = 0;
for ($i = $o-1; $i >= 0; $i--) {
$d = (int)$l[$i] + (int)$r[$i] + $carry;
if ($d <= 9) {
$carry = 0;
} else {
$carry = 1;
$d -= 10;
}
$v = (string) $d . $v;
}
if ($carry > 0)
$v = "1" . $v;
return $v;
}
/**
* Create a big math comparison function
* @param string $l
* @param string $r
* @return string
*/
function bmcomp($l, $r) {
if (function_exists('bccomp'))
return bccomp($l, $r);
global $profile;
if ($profile['use_gmp'])
return gmp_strval(gmp_cmp($l, $r));
$l = strval($l); $r = strval($r);
$ll = strlen($l); $lr = strlen($r);
if ($ll != $lr)
return ($ll > $lr) ? 1 : -1;
return strcmp($l, $r);
}
/**
* Create a big math division function
* @param string $l
* @param string $r
* @param int $z
* @return string
* @url http://www.icosaedro.it/bigint Inspired by
*/
function bmdiv($l, $r, $z = 0) {
if (function_exists('bcdiv'))
return ($z == 0) ? bcdiv($l, $r) : bcmod($l, $r);
global $profile;
if ($profile['use_gmp'])
return gmp_strval(($z == 0) ? gmp_div_q($l, $r) : gmp_mod($l, $r));
$l = strval($l); $r = strval($r);
$v = '0';
while (true) {
if( bmcomp($l, $r) < 0 )
break;