-
Notifications
You must be signed in to change notification settings - Fork 1.1k
/
mod_authnz_ldap.c
1229 lines (1073 loc) · 46.7 KB
/
mod_authnz_ldap.c
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
/* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "ap_provider.h"
#include "httpd.h"
#include "http_config.h"
#include "http_core.h"
#include "http_log.h"
#include "http_protocol.h"
#include "http_request.h"
#include "util_ldap.h"
#include "mod_auth.h"
#include "apr_strings.h"
#include "apr_xlate.h"
#define APR_WANT_STRFUNC
#include "apr_want.h"
#include "apr_lib.h"
#if APR_HAVE_UNISTD_H
/* for getpid() */
#include <unistd.h>
#endif
#include <ctype.h>
#if !APR_HAS_LDAP
#error mod_authnz_ldap requires APR-util to have LDAP support built in. To fix add --with-ldap to ./configure.
#endif
typedef struct {
apr_pool_t *pool; /* Pool that this config is allocated from */
#if APR_HAS_THREADS
apr_thread_mutex_t *lock; /* Lock for this config */
#endif
int auth_authoritative; /* Is this auth method the one and only? */
/* int authz_enabled; Is ldap authorization enabled in this directory? */
/* These parameters are all derived from the AuthLDAPURL directive */
char *url; /* String representation of the URL */
char *host; /* Name of the LDAP server (or space separated list) */
int port; /* Port of the LDAP server */
char *basedn; /* Base DN to do all searches from */
char *attribute; /* Attribute to search for */
char **attributes; /* Array of all the attributes to return */
int scope; /* Scope of the search */
char *filter; /* Filter to further limit the search */
deref_options deref; /* how to handle alias dereferening */
char *binddn; /* DN to bind to server (can be NULL) */
char *bindpw; /* Password to bind to server (can be NULL) */
int user_is_dn; /* If true, connection->user is DN instead of userid */
char *remote_user_attribute; /* If set, connection->user is this attribute instead of userid */
int compare_dn_on_server; /* If true, will use server to do DN compare */
int have_ldap_url; /* Set if we have found an LDAP url */
apr_array_header_t *groupattr; /* List of Group attributes */
int group_attrib_is_dn; /* If true, the group attribute is the DN, otherwise,
it's the exact string passed by the HTTP client */
int secure; /* True if SSL connections are requested */
} authn_ldap_config_t;
typedef struct {
char *dn; /* The saved dn from a successful search */
char *user; /* The username provided by the client */
} authn_ldap_request_t;
/* maximum group elements supported */
#define GROUPATTR_MAX_ELTS 10
struct mod_auth_ldap_groupattr_entry_t {
char *name;
};
module AP_MODULE_DECLARE_DATA authnz_ldap_module;
static APR_OPTIONAL_FN_TYPE(uldap_connection_close) *util_ldap_connection_close;
static APR_OPTIONAL_FN_TYPE(uldap_connection_find) *util_ldap_connection_find;
static APR_OPTIONAL_FN_TYPE(uldap_cache_comparedn) *util_ldap_cache_comparedn;
static APR_OPTIONAL_FN_TYPE(uldap_cache_compare) *util_ldap_cache_compare;
static APR_OPTIONAL_FN_TYPE(uldap_cache_checkuserid) *util_ldap_cache_checkuserid;
static APR_OPTIONAL_FN_TYPE(uldap_cache_getuserdn) *util_ldap_cache_getuserdn;
static APR_OPTIONAL_FN_TYPE(uldap_ssl_supported) *util_ldap_ssl_supported;
static apr_hash_t *charset_conversions = NULL;
static char *to_charset = NULL; /* UTF-8 identifier derived from the charset.conv file */
/* Derive a code page ID give a language name or ID */
static char* derive_codepage_from_lang (apr_pool_t *p, char *language)
{
int lang_len;
char *charset;
if (!language) /* our default codepage */
return apr_pstrdup(p, "ISO-8859-1");
else
lang_len = strlen(language);
charset = (char*) apr_hash_get(charset_conversions, language, APR_HASH_KEY_STRING);
if (!charset) {
language[2] = '\0';
charset = (char*) apr_hash_get(charset_conversions, language, APR_HASH_KEY_STRING);
}
if (charset) {
charset = apr_pstrdup(p, charset);
}
return charset;
}
static apr_xlate_t* get_conv_set (request_rec *r)
{
char *lang_line = (char*)apr_table_get(r->headers_in, "accept-language");
char *lang;
apr_xlate_t *convset;
if (lang_line) {
lang_line = apr_pstrdup(r->pool, lang_line);
for (lang = lang_line;*lang;lang++) {
if ((*lang == ',') || (*lang == ';')) {
*lang = '\0';
break;
}
}
lang = derive_codepage_from_lang(r->pool, lang_line);
if (lang && (apr_xlate_open(&convset, to_charset, lang, r->pool) == APR_SUCCESS)) {
return convset;
}
}
return NULL;
}
/*
* Build the search filter, or at least as much of the search filter that
* will fit in the buffer. We don't worry about the buffer not being able
* to hold the entire filter. If the buffer wasn't big enough to hold the
* filter, ldap_search_s will complain, but the only situation where this
* is likely to happen is if the client sent a really, really long
* username, most likely as part of an attack.
*
* The search filter consists of the filter provided with the URL,
* combined with a filter made up of the attribute provided with the URL,
* and the actual username passed by the HTTP client. For example, assume
* that the LDAP URL is
*
* ldap://ldap.airius.com/ou=People, o=Airius?uid??(posixid=*)
*
* Further, assume that the userid passed by the client was `userj'. The
* search filter will be (&(posixid=*)(uid=userj)).
*/
#define FILTER_LENGTH MAX_STRING_LEN
static void authn_ldap_build_filter(char *filtbuf,
request_rec *r,
const char* sent_user,
const char* sent_filter,
authn_ldap_config_t *sec)
{
char *p, *q, *filtbuf_end;
char *user, *filter;
apr_xlate_t *convset = NULL;
apr_size_t inbytes;
apr_size_t outbytes;
char *outbuf;
if (sent_user != NULL) {
user = apr_pstrdup (r->pool, sent_user);
}
else
return;
if (sent_filter != NULL) {
filter = apr_pstrdup (r->pool, sent_filter);
}
else
filter = sec->filter;
if (charset_conversions) {
convset = get_conv_set(r);
}
if (convset) {
inbytes = strlen(user);
outbytes = (inbytes+1)*3;
outbuf = apr_pcalloc(r->pool, outbytes);
/* Convert the user name to UTF-8. This is only valid for LDAP v3 */
if (apr_xlate_conv_buffer(convset, user, &inbytes, outbuf, &outbytes) == APR_SUCCESS) {
user = apr_pstrdup(r->pool, outbuf);
}
}
/*
* Create the first part of the filter, which consists of the
* config-supplied portions.
*/
apr_snprintf(filtbuf, FILTER_LENGTH, "(&(%s)(%s=", filter, sec->attribute);
/*
* Now add the client-supplied username to the filter, ensuring that any
* LDAP filter metachars are escaped.
*/
filtbuf_end = filtbuf + FILTER_LENGTH - 1;
#if APR_HAS_MICROSOFT_LDAPSDK
for (p = user, q=filtbuf + strlen(filtbuf);
*p && q < filtbuf_end; ) {
if (strchr("*()\\", *p) != NULL) {
if ( q + 3 >= filtbuf_end)
break; /* Don't write part of escape sequence if we can't write all of it */
*q++ = '\\';
switch ( *p++ )
{
case '*':
*q++ = '2';
*q++ = 'a';
break;
case '(':
*q++ = '2';
*q++ = '8';
break;
case ')':
*q++ = '2';
*q++ = '9';
break;
case '\\':
*q++ = '5';
*q++ = 'c';
break;
}
}
else
*q++ = *p++;
}
#else
for (p = user, q=filtbuf + strlen(filtbuf);
*p && q < filtbuf_end; *q++ = *p++) {
if (strchr("*()\\", *p) != NULL) {
*q++ = '\\';
if (q >= filtbuf_end) {
break;
}
}
}
#endif
*q = '\0';
/*
* Append the closing parens of the filter, unless doing so would
* overrun the buffer.
*/
if (q + 2 <= filtbuf_end)
strcat(filtbuf, "))");
}
static void *create_authnz_ldap_dir_config(apr_pool_t *p, char *d)
{
authn_ldap_config_t *sec =
(authn_ldap_config_t *)apr_pcalloc(p, sizeof(authn_ldap_config_t));
sec->pool = p;
#if APR_HAS_THREADS
apr_thread_mutex_create(&sec->lock, APR_THREAD_MUTEX_DEFAULT, p);
#endif
/*
sec->authz_enabled = 1;
*/
sec->groupattr = apr_array_make(p, GROUPATTR_MAX_ELTS,
sizeof(struct mod_auth_ldap_groupattr_entry_t));
sec->have_ldap_url = 0;
sec->url = "";
sec->host = NULL;
sec->binddn = NULL;
sec->bindpw = NULL;
sec->deref = always;
sec->group_attrib_is_dn = 1;
sec->auth_authoritative = 1;
/*
sec->frontpage_hack = 0;
*/
sec->secure = -1; /*Initialize to unset*/
sec->user_is_dn = 0;
sec->remote_user_attribute = NULL;
sec->compare_dn_on_server = 0;
return sec;
}
static apr_status_t authnz_ldap_cleanup_connection_close(void *param)
{
util_ldap_connection_t *ldc = param;
util_ldap_connection_close(ldc);
return APR_SUCCESS;
}
/*
* Authentication Phase
* --------------------
*
* This phase authenticates the credentials the user has sent with
* the request (ie the username and password are checked). This is done
* by making an attempt to bind to the LDAP server using this user's
* DN and the supplied password.
*
*/
static authn_status authn_ldap_check_password(request_rec *r, const char *user,
const char *password)
{
int failures = 0;
const char **vals = NULL;
char filtbuf[FILTER_LENGTH];
authn_ldap_config_t *sec =
(authn_ldap_config_t *)ap_get_module_config(r->per_dir_config, &authnz_ldap_module);
util_ldap_connection_t *ldc = NULL;
int result = 0;
int remote_user_attribute_set = 0;
const char *dn = NULL;
authn_ldap_request_t *req =
(authn_ldap_request_t *)apr_pcalloc(r->pool, sizeof(authn_ldap_request_t));
ap_set_module_config(r->request_config, &authnz_ldap_module, req);
/*
if (!sec->enabled) {
return AUTH_USER_NOT_FOUND;
}
*/
/*
* Basic sanity checks before any LDAP operations even happen.
*/
if (!sec->have_ldap_url) {
return AUTH_GENERAL_ERROR;
}
start_over:
/* There is a good AuthLDAPURL, right? */
if (sec->host) {
ldc = util_ldap_connection_find(r, sec->host, sec->port,
sec->binddn, sec->bindpw, sec->deref,
sec->secure);
}
else {
ap_log_rerror(APLOG_MARK, APLOG_WARNING, 0, r,
"[%" APR_PID_T_FMT "] auth_ldap authenticate: no sec->host - weird...?", getpid());
return AUTH_GENERAL_ERROR;
}
ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r,
"[%" APR_PID_T_FMT "] auth_ldap authenticate: using URL %s", getpid(), sec->url);
/* Get the password that the client sent */
if (password == NULL) {
ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r,
"[%" APR_PID_T_FMT "] auth_ldap authenticate: no password specified", getpid());
util_ldap_connection_close(ldc);
return AUTH_GENERAL_ERROR;
}
if (user == NULL) {
ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r,
"[%" APR_PID_T_FMT "] auth_ldap authenticate: no user specified", getpid());
util_ldap_connection_close(ldc);
return AUTH_GENERAL_ERROR;
}
/* build the username filter */
authn_ldap_build_filter(filtbuf, r, user, NULL, sec);
/* do the user search */
result = util_ldap_cache_checkuserid(r, ldc, sec->url, sec->basedn, sec->scope,
sec->attributes, filtbuf, password, &dn, &vals);
util_ldap_connection_close(ldc);
/* sanity check - if server is down, retry it up to 5 times */
if (AP_LDAP_IS_SERVER_DOWN(result)) {
if (failures++ <= 5) {
goto start_over;
}
}
/* handle bind failure */
if (result != LDAP_SUCCESS) {
ap_log_rerror(APLOG_MARK, APLOG_WARNING, 0, r,
"[%" APR_PID_T_FMT "] auth_ldap authenticate: "
"user %s authentication failed; URI %s [%s][%s]",
getpid(), user, r->uri, ldc->reason, ldap_err2string(result));
return (LDAP_NO_SUCH_OBJECT == result) ? AUTH_USER_NOT_FOUND
#ifdef LDAP_SECURITY_ERROR
: (LDAP_SECURITY_ERROR(result)) ? AUTH_DENIED
#else
: (LDAP_INAPPROPRIATE_AUTH == result) ? AUTH_DENIED
: (LDAP_INVALID_CREDENTIALS == result) ? AUTH_DENIED
#ifdef LDAP_INSUFFICIENT_ACCESS
: (LDAP_INSUFFICIENT_ACCESS == result) ? AUTH_DENIED
#endif
#ifdef LDAP_INSUFFICIENT_RIGHTS
: (LDAP_INSUFFICIENT_RIGHTS == result) ? AUTH_DENIED
#endif
#endif
: AUTH_GENERAL_ERROR;
}
/* mark the user and DN */
req->dn = apr_pstrdup(r->pool, dn);
req->user = apr_pstrdup(r->pool, user);
if (sec->user_is_dn) {
r->user = req->dn;
}
/* add environment variables */
if (sec->attributes && vals) {
apr_table_t *e = r->subprocess_env;
int i = 0;
while (sec->attributes[i]) {
char *str = apr_pstrcat(r->pool, AUTHN_PREFIX, sec->attributes[i], NULL);
int j = sizeof(AUTHN_PREFIX)-1; /* string length of "AUTHENTICATE_", excluding the trailing NIL */
while (str[j]) {
str[j] = apr_toupper(str[j]);
j++;
}
apr_table_setn(e, str, vals[i]);
/* handle remote_user_attribute, if set */
if (sec->remote_user_attribute &&
!strcmp(sec->remote_user_attribute, sec->attributes[i])) {
r->user = (char *)apr_pstrdup(r->pool, vals[i]);
remote_user_attribute_set = 1;
}
i++;
}
}
/* sanity check */
if (sec->remote_user_attribute && !remote_user_attribute_set) {
ap_log_rerror(APLOG_MARK, APLOG_WARNING, 0, r,
"[%" APR_PID_T_FMT "] auth_ldap authenticate: "
"REMOTE_USER was to be set with attribute '%s', "
"but this attribute was not requested for in the "
"LDAP query for the user. REMOTE_USER will fall "
"back to username or DN as appropriate.", getpid(),
sec->remote_user_attribute);
}
ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r,
"[%" APR_PID_T_FMT "] auth_ldap authenticate: accepting %s", getpid(), user);
return AUTH_GRANTED;
}
/*
* Authorisation Phase
* -------------------
*
* After checking whether the username and password are correct, we need
* to check whether that user is authorised to view this resource. The
* require directive is used to do this:
*
* require valid-user Any authenticated is allowed in.
* require user <username> This particular user is allowed in.
* require group <groupname> The user must be a member of this group
* in order to be allowed in.
* require dn <dn> The user must have the following DN in the
* LDAP tree to be let in.
*
*/
static int authz_ldap_check_user_access(request_rec *r)
{
int result = 0;
authn_ldap_request_t *req =
(authn_ldap_request_t *)ap_get_module_config(r->request_config, &authnz_ldap_module);
authn_ldap_config_t *sec =
(authn_ldap_config_t *)ap_get_module_config(r->per_dir_config, &authnz_ldap_module);
util_ldap_connection_t *ldc = NULL;
int m = r->method_number;
const apr_array_header_t *reqs_arr = ap_requires(r);
require_line *reqs = reqs_arr ? (require_line *)reqs_arr->elts : NULL;
register int x;
const char *t;
char *w, *value;
int method_restricted = 0;
int required_ldap = 0;
char filtbuf[FILTER_LENGTH];
const char *dn = NULL;
const char **vals = NULL;
/*
if (!sec->enabled) {
return DECLINED;
}
*/
if (!sec->have_ldap_url) {
return DECLINED;
}
if (sec->host) {
ldc = util_ldap_connection_find(r, sec->host, sec->port,
sec->binddn, sec->bindpw, sec->deref,
sec->secure);
apr_pool_cleanup_register(r->pool, ldc,
authnz_ldap_cleanup_connection_close,
apr_pool_cleanup_null);
}
else {
ap_log_rerror(APLOG_MARK, APLOG_WARNING, 0, r,
"[%" APR_PID_T_FMT "] auth_ldap authorise: no sec->host - weird...?", getpid());
return sec->auth_authoritative? HTTP_UNAUTHORIZED : DECLINED;
}
/*
* If there are no elements in the group attribute array, the default should be
* member and uniquemember; populate the array now.
*/
if (sec->groupattr->nelts == 0) {
struct mod_auth_ldap_groupattr_entry_t *grp;
#if APR_HAS_THREADS
apr_thread_mutex_lock(sec->lock);
#endif
grp = apr_array_push(sec->groupattr);
grp->name = "member";
grp = apr_array_push(sec->groupattr);
grp->name = "uniquemember";
#if APR_HAS_THREADS
apr_thread_mutex_unlock(sec->lock);
#endif
}
if (!reqs_arr) {
ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r,
"[%" APR_PID_T_FMT "] auth_ldap authorise: no requirements array", getpid());
return sec->auth_authoritative? HTTP_UNAUTHORIZED : DECLINED;
}
/*
* If we have been authenticated by some other module than mod_auth_ldap,
* the req structure needed for authorization needs to be created
* and populated with the userid and DN of the account in LDAP
*/
/* Check that we have a userid to start with */
if ((!r->user) || (strlen(r->user) == 0)) {
ap_log_rerror(APLOG_MARK, APLOG_WARNING, 0, r,
"ldap authorize: Userid is blank, AuthType=%s",
r->ap_auth_type);
}
if(!req) {
ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r,
"ldap authorize: Creating LDAP req structure");
/* Build the username filter */
authn_ldap_build_filter(filtbuf, r, r->user, NULL, sec);
/* Search for the user DN */
result = util_ldap_cache_getuserdn(r, ldc, sec->url, sec->basedn,
sec->scope, sec->attributes, filtbuf, &dn, &vals);
/* Search failed, log error and return failure */
if(result != LDAP_SUCCESS) {
ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r,
"auth_ldap authorise: User DN not found, %s", ldc->reason);
return sec->auth_authoritative? HTTP_UNAUTHORIZED : DECLINED;
}
req = (authn_ldap_request_t *)apr_pcalloc(r->pool,
sizeof(authn_ldap_request_t));
ap_set_module_config(r->request_config, &authnz_ldap_module, req);
req->dn = apr_pstrdup(r->pool, dn);
req->user = r->user;
}
/* Loop through the requirements array until there's no elements
* left, or something causes a return from inside the loop */
for(x=0; x < reqs_arr->nelts; x++) {
if (! (reqs[x].method_mask & (AP_METHOD_BIT << m))) {
continue;
}
method_restricted = 1;
t = reqs[x].requirement;
w = ap_getword_white(r->pool, &t);
if (strcmp(w, "ldap-user") == 0) {
required_ldap = 1;
if (req->dn == NULL || strlen(req->dn) == 0) {
ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r,
"[%" APR_PID_T_FMT "] auth_ldap authorise: "
"require user: user's DN has not been defined; failing authorisation",
getpid());
return sec->auth_authoritative? HTTP_UNAUTHORIZED : DECLINED;
}
/*
* First do a whole-line compare, in case it's something like
* require user Babs Jensen
*/
result = util_ldap_cache_compare(r, ldc, sec->url, req->dn, sec->attribute, t);
switch(result) {
case LDAP_COMPARE_TRUE: {
ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r,
"[%" APR_PID_T_FMT "] auth_ldap authorise: "
"require user: authorisation successful", getpid());
return OK;
}
default: {
ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r,
"[%" APR_PID_T_FMT "] auth_ldap authorise: require user: "
"authorisation failed [%s][%s]", getpid(),
ldc->reason, ldap_err2string(result));
}
}
/*
* Now break apart the line and compare each word on it
*/
while (t[0]) {
w = ap_getword_conf(r->pool, &t);
result = util_ldap_cache_compare(r, ldc, sec->url, req->dn, sec->attribute, w);
switch(result) {
case LDAP_COMPARE_TRUE: {
ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r,
"[%" APR_PID_T_FMT "] auth_ldap authorise: "
"require user: authorisation successful", getpid());
return OK;
}
default: {
ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r,
"[%" APR_PID_T_FMT "] auth_ldap authorise: "
"require user: authorisation failed [%s][%s]",
getpid(), ldc->reason, ldap_err2string(result));
}
}
}
}
else if (strcmp(w, "ldap-dn") == 0) {
required_ldap = 1;
if (req->dn == NULL || strlen(req->dn) == 0) {
ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r,
"[%" APR_PID_T_FMT "] auth_ldap authorise: "
"require dn: user's DN has not been defined; failing authorisation",
getpid());
return sec->auth_authoritative? HTTP_UNAUTHORIZED : DECLINED;
}
result = util_ldap_cache_comparedn(r, ldc, sec->url, req->dn, t, sec->compare_dn_on_server);
switch(result) {
case LDAP_COMPARE_TRUE: {
ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r,
"[%" APR_PID_T_FMT "] auth_ldap authorise: "
"require dn: authorisation successful", getpid());
return OK;
}
default: {
ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r,
"[%" APR_PID_T_FMT "] auth_ldap authorise: "
"require dn \"%s\": LDAP error [%s][%s]",
getpid(), t, ldc->reason, ldap_err2string(result));
}
}
}
else if (strcmp(w, "ldap-group") == 0) {
struct mod_auth_ldap_groupattr_entry_t *ent = (struct mod_auth_ldap_groupattr_entry_t *) sec->groupattr->elts;
int i;
required_ldap = 1;
if (sec->group_attrib_is_dn) {
if (req->dn == NULL || strlen(req->dn) == 0) {
ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r,
"[%" APR_PID_T_FMT "] auth_ldap authorise: require group: "
"user's DN has not been defined; failing authorisation",
getpid());
return sec->auth_authoritative? HTTP_UNAUTHORIZED : DECLINED;
}
}
else {
if (req->user == NULL || strlen(req->user) == 0) {
/* We weren't called in the authentication phase, so we didn't have a
* chance to set the user field. Do so now. */
req->user = r->user;
}
}
ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r,
"[%" APR_PID_T_FMT "] auth_ldap authorise: require group: "
"testing for group membership in \"%s\"",
getpid(), t);
for (i = 0; i < sec->groupattr->nelts; i++) {
ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r,
"[%" APR_PID_T_FMT "] auth_ldap authorise: require group: "
"testing for %s: %s (%s)", getpid(),
ent[i].name, sec->group_attrib_is_dn ? req->dn : req->user, t);
result = util_ldap_cache_compare(r, ldc, sec->url, t, ent[i].name,
sec->group_attrib_is_dn ? req->dn : req->user);
switch(result) {
case LDAP_COMPARE_TRUE: {
ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r,
"[%" APR_PID_T_FMT "] auth_ldap authorise: require group: "
"authorisation successful (attribute %s) [%s][%s]",
getpid(), ent[i].name, ldc->reason, ldap_err2string(result));
return OK;
}
default: {
ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r,
"[%" APR_PID_T_FMT "] auth_ldap authorise: require group \"%s\": "
"authorisation failed [%s][%s]",
getpid(), t, ldc->reason, ldap_err2string(result));
}
}
}
}
else if (strcmp(w, "ldap-attribute") == 0) {
required_ldap = 1;
if (req->dn == NULL || strlen(req->dn) == 0) {
ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r,
"[%" APR_PID_T_FMT "] auth_ldap authorise: "
"require ldap-attribute: user's DN has not been defined; failing authorisation",
getpid());
return sec->auth_authoritative? HTTP_UNAUTHORIZED : DECLINED;
}
while (t[0]) {
w = ap_getword(r->pool, &t, '=');
value = ap_getword_conf(r->pool, &t);
ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r,
"[%" APR_PID_T_FMT "] auth_ldap authorise: checking attribute"
" %s has value %s", getpid(), w, value);
result = util_ldap_cache_compare(r, ldc, sec->url, req->dn,
w, value);
switch(result) {
case LDAP_COMPARE_TRUE: {
ap_log_rerror(APLOG_MARK, APLOG_DEBUG,
0, r, "[%" APR_PID_T_FMT "] auth_ldap authorise: "
"require attribute: authorisation "
"successful", getpid());
return OK;
}
default: {
ap_log_rerror(APLOG_MARK, APLOG_DEBUG,
0, r, "[%" APR_PID_T_FMT "] auth_ldap authorise: "
"require attribute: authorisation "
"failed [%s][%s]", getpid(),
ldc->reason, ldap_err2string(result));
}
}
}
}
else if (strcmp(w, "ldap-filter") == 0) {
required_ldap = 1;
if (req->dn == NULL || strlen(req->dn) == 0) {
ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r,
"[%" APR_PID_T_FMT "] auth_ldap authorise: "
"require ldap-filter: user's DN has not been defined; failing authorisation",
getpid());
return sec->auth_authoritative? HTTP_UNAUTHORIZED : DECLINED;
}
if (t[0]) {
ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r,
"[%" APR_PID_T_FMT "] auth_ldap authorise: checking filter %s",
getpid(), t);
/* Build the username filter */
authn_ldap_build_filter(filtbuf, r, req->user, t, sec);
/* Search for the user DN */
result = util_ldap_cache_getuserdn(r, ldc, sec->url, sec->basedn,
sec->scope, sec->attributes, filtbuf, &dn, &vals);
/* Make sure that the filtered search returned the correct user dn */
if (result == LDAP_SUCCESS) {
ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r,
"[%" APR_PID_T_FMT "] auth_ldap authorise: checking dn match %s",
getpid(), dn);
result = util_ldap_cache_comparedn(r, ldc, sec->url, req->dn, dn,
sec->compare_dn_on_server);
}
switch(result) {
case LDAP_COMPARE_TRUE: {
ap_log_rerror(APLOG_MARK, APLOG_DEBUG,
0, r, "[%" APR_PID_T_FMT "] auth_ldap authorise: "
"require ldap-filter: authorisation "
"successful", getpid());
return OK;
}
case LDAP_FILTER_ERROR: {
ap_log_rerror(APLOG_MARK, APLOG_DEBUG,
0, r, "[%" APR_PID_T_FMT "] auth_ldap authorise: "
"require ldap-filter: %s authorisation "
"failed [%s][%s]", getpid(),
filtbuf, ldc->reason, ldap_err2string(result));
break;
}
default: {
ap_log_rerror(APLOG_MARK, APLOG_DEBUG,
0, r, "[%" APR_PID_T_FMT "] auth_ldap authorise: "
"require ldap-filter: authorisation "
"failed [%s][%s]", getpid(),
ldc->reason, ldap_err2string(result));
}
}
}
}
}
if (!method_restricted) {
ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r,
"[%" APR_PID_T_FMT "] auth_ldap authorise: agreeing because non-restricted",
getpid());
return OK;
}
if (!required_ldap || !sec->auth_authoritative) {
ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r,
"[%" APR_PID_T_FMT "] auth_ldap authorise: declining to authorise", getpid());
return DECLINED;
}
ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r,
"[%" APR_PID_T_FMT "] auth_ldap authorise: authorisation denied", getpid());
ap_note_basic_auth_failure (r);
return HTTP_UNAUTHORIZED;
}
/*
* Use the ldap url parsing routines to break up the ldap url into
* host and port.
*/
static const char *mod_auth_ldap_parse_url(cmd_parms *cmd,
void *config,
const char *url,
const char *mode)
{
int rc;
apr_ldap_url_desc_t *urld;
apr_ldap_err_t *result;
authn_ldap_config_t *sec = config;
rc = apr_ldap_url_parse(cmd->pool, url, &(urld), &(result));
if (rc != APR_SUCCESS) {
return result->reason;
}
sec->url = apr_pstrdup(cmd->pool, url);
/* Set all the values, or at least some sane defaults */
if (sec->host) {
char *p = apr_palloc(cmd->pool, strlen(sec->host) + strlen(urld->lud_host) + 2);
strcpy(p, urld->lud_host);
strcat(p, " ");
strcat(p, sec->host);
sec->host = p;
}
else {
sec->host = urld->lud_host? apr_pstrdup(cmd->pool, urld->lud_host) : "localhost";
}
sec->basedn = urld->lud_dn? apr_pstrdup(cmd->pool, urld->lud_dn) : "";
if (urld->lud_attrs && urld->lud_attrs[0]) {
int i = 1;
while (urld->lud_attrs[i]) {
i++;
}
sec->attributes = apr_pcalloc(cmd->pool, sizeof(char *) * (i+1));
i = 0;
while (urld->lud_attrs[i]) {
sec->attributes[i] = apr_pstrdup(cmd->pool, urld->lud_attrs[i]);
i++;
}
sec->attribute = sec->attributes[0];
}
else {
sec->attribute = "uid";
}
sec->scope = urld->lud_scope == LDAP_SCOPE_ONELEVEL ?
LDAP_SCOPE_ONELEVEL : LDAP_SCOPE_SUBTREE;
if (urld->lud_filter) {
if (urld->lud_filter[0] == '(') {
/*
* Get rid of the surrounding parens; later on when generating the
* filter, they'll be put back.
*/
sec->filter = apr_pstrdup(cmd->pool, urld->lud_filter+1);
sec->filter[strlen(sec->filter)-1] = '\0';
}
else {
sec->filter = apr_pstrdup(cmd->pool, urld->lud_filter);
}
}
else {
sec->filter = "objectclass=*";
}
if (mode) {
if (0 == strcasecmp("NONE", mode)) {
sec->secure = APR_LDAP_NONE;
}
else if (0 == strcasecmp("SSL", mode)) {
sec->secure = APR_LDAP_SSL;
}
else if (0 == strcasecmp("TLS", mode) || 0 == strcasecmp("STARTTLS", mode)) {
sec->secure = APR_LDAP_STARTTLS;
}
else {
return "Invalid LDAP connection mode setting: must be one of NONE, "
"SSL, or TLS/STARTTLS";
}
}
/* "ldaps" indicates secure ldap connections desired
*/
if (strncasecmp(url, "ldaps", 5) == 0)
{
sec->secure = APR_LDAP_SSL;
sec->port = urld->lud_port? urld->lud_port : LDAPS_PORT;
}
else
{
sec->port = urld->lud_port? urld->lud_port : LDAP_PORT;
}
sec->have_ldap_url = 1;
ap_log_error(APLOG_MARK, APLOG_DEBUG, 0,
cmd->server, "[%" APR_PID_T_FMT "] auth_ldap url parse: `%s', Host: %s, Port: %d, DN: %s, attrib: %s, scope: %s, filter: %s, connection mode: %s",
getpid(),
url,
urld->lud_host,
urld->lud_port,
urld->lud_dn,
urld->lud_attrs? urld->lud_attrs[0] : "(null)",
(urld->lud_scope == LDAP_SCOPE_SUBTREE? "subtree" :
urld->lud_scope == LDAP_SCOPE_BASE? "base" :
urld->lud_scope == LDAP_SCOPE_ONELEVEL? "onelevel" : "unknown"),
urld->lud_filter,
sec->secure == APR_LDAP_SSL ? "using SSL": "not using SSL"
);
return NULL;
}
static const char *mod_auth_ldap_set_deref(cmd_parms *cmd, void *config, const char *arg)
{
authn_ldap_config_t *sec = config;
if (strcmp(arg, "never") == 0 || strcasecmp(arg, "off") == 0) {
sec->deref = never;
}
else if (strcmp(arg, "searching") == 0) {
sec->deref = searching;
}
else if (strcmp(arg, "finding") == 0) {
sec->deref = finding;
}
else if (strcmp(arg, "always") == 0 || strcasecmp(arg, "on") == 0) {
sec->deref = always;
}
else {
return "Unrecognized value for AuthLDAPAliasDereference directive";
}
return NULL;
}
static const char *mod_auth_ldap_add_group_attribute(cmd_parms *cmd, void *config, const char *arg)