forked from dlenski/openconnect
-
Notifications
You must be signed in to change notification settings - Fork 1
/
Copy pathlibrary.c
1149 lines (998 loc) · 28.9 KB
/
library.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
/*
* OpenConnect (SSL + DTLS) VPN client
*
* Copyright © 2008-2015 Intel Corporation.
* Copyright © 2013 John Morrissey <[email protected]>
*
* Authors: David Woodhouse <[email protected]>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License
* version 2.1, as published by the Free Software Foundation.
*
* 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
* Lesser General Public License for more details.
*/
#include <config.h>
#include <string.h>
#include <errno.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <ctype.h>
#ifdef HAVE_LIBSTOKEN
#include <stoken.h>
#endif
#include <libxml/tree.h>
#include <zlib.h>
#include "openconnect-internal.h"
#if defined(OPENCONNECT_GNUTLS)
#include "gnutls.h"
#endif
struct openconnect_info *openconnect_vpninfo_new(const char *useragent,
openconnect_validate_peer_cert_vfn validate_peer_cert,
openconnect_write_new_config_vfn write_new_config,
openconnect_process_auth_form_vfn process_auth_form,
openconnect_progress_vfn progress,
void *privdata)
{
struct openconnect_info *vpninfo = calloc(sizeof(*vpninfo), 1);
#ifdef HAVE_ICONV
char *charset = nl_langinfo(CODESET);
#endif
if (!vpninfo)
return NULL;
#ifdef HAVE_ICONV
if (charset && strcmp(charset, "UTF-8")) {
vpninfo->ic_utf8_to_legacy = iconv_open(charset, "UTF-8");
vpninfo->ic_legacy_to_utf8 = iconv_open("UTF-8", charset);
} else {
vpninfo->ic_utf8_to_legacy = (iconv_t)-1;
vpninfo->ic_legacy_to_utf8 = (iconv_t)-1;
}
#endif
#ifndef _WIN32
vpninfo->tun_fd = -1;
#endif
init_pkt_queue(&vpninfo->incoming_queue);
init_pkt_queue(&vpninfo->outgoing_queue);
init_pkt_queue(&vpninfo->oncp_control_queue);
vpninfo->dtls_tos_current = 0;
vpninfo->dtls_pass_tos = 0;
vpninfo->ssl_fd = vpninfo->dtls_fd = -1;
vpninfo->cmd_fd = vpninfo->cmd_fd_write = -1;
vpninfo->tncc_fd = -1;
vpninfo->cert_expire_warning = 60 * 86400;
vpninfo->req_compr = COMPR_STATELESS;
vpninfo->max_qlen = 10;
vpninfo->localname = strdup("localhost");
vpninfo->useragent = openconnect_create_useragent(useragent);
vpninfo->validate_peer_cert = validate_peer_cert;
vpninfo->write_new_config = write_new_config;
vpninfo->process_auth_form = process_auth_form;
vpninfo->progress = progress;
vpninfo->cbdata = privdata ? : vpninfo;
vpninfo->xmlpost = 1;
vpninfo->verbose = PRG_TRACE;
vpninfo->try_http_auth = 1;
vpninfo->proxy_auth[AUTH_TYPE_BASIC].state = AUTH_DEFAULT_DISABLED;
vpninfo->http_auth[AUTH_TYPE_BASIC].state = AUTH_DEFAULT_DISABLED;
openconnect_set_reported_os(vpninfo, NULL);
if (!vpninfo->localname || !vpninfo->useragent)
goto err;
#ifdef ENABLE_NLS
bindtextdomain("openconnect", LOCALEDIR);
#endif
openconnect_set_protocol(vpninfo, "anyconnect");
return vpninfo;
err:
free(vpninfo->localname);
free(vpninfo->useragent);
free(vpninfo);
return NULL;
}
const struct vpn_proto openconnect_protos[] = {
{
.name = "anyconnect",
.pretty_name = N_("Cisco AnyConnect or openconnect"),
.description = N_("Compatible with Cisco AnyConnect SSL VPN, as well as ocserv"),
.flags = OC_PROTO_PROXY | OC_PROTO_CSD | OC_PROTO_AUTH_CERT | OC_PROTO_AUTH_OTP | OC_PROTO_AUTH_STOKEN,
.vpn_close_session = cstp_bye,
.tcp_connect = cstp_connect,
.tcp_mainloop = cstp_mainloop,
.add_http_headers = cstp_common_headers,
.obtain_cookie = cstp_obtain_cookie,
#ifdef HAVE_DTLS
.udp_setup = dtls_setup,
.udp_mainloop = dtls_mainloop,
.udp_close = dtls_close,
.udp_shutdown = dtls_shutdown,
#endif
}, {
.name = "nc",
.pretty_name = N_("Juniper Network Connect"),
.description = N_("Compatible with Juniper Network Connect / Pulse Secure SSL VPN"),
.flags = OC_PROTO_PROXY | OC_PROTO_CSD | OC_PROTO_AUTH_CERT | OC_PROTO_AUTH_OTP,
.vpn_close_session = oncp_bye,
.tcp_connect = oncp_connect,
.tcp_mainloop = oncp_mainloop,
.add_http_headers = oncp_common_headers,
.obtain_cookie = oncp_obtain_cookie,
#ifdef HAVE_ESP
.udp_setup = esp_setup,
.udp_mainloop = esp_mainloop,
.udp_close = esp_close,
.udp_shutdown = esp_shutdown,
.udp_send_probes = esp_send_probes,
.udp_catch_probe = esp_catch_probe,
#endif
}, {
.name = "gp",
.pretty_name = N_("Palo Alto Networks GlobalProtect"),
.description = N_("Compatible with Palo Alto Networks (PAN) GlobalProtect SSL VPN"),
.flags = OC_PROTO_PROXY | OC_PROTO_AUTH_CERT | OC_PROTO_AUTH_OTP | OC_PROTO_AUTH_STOKEN,
.vpn_close_session = gpst_bye,
.tcp_connect = gpst_setup,
.tcp_mainloop = gpst_mainloop,
.add_http_headers = gpst_common_headers,
.obtain_cookie = gpst_obtain_cookie,
#ifdef HAVE_ESP
.udp_setup = esp_setup,
.udp_mainloop = esp_mainloop,
.udp_close = esp_close_secret,
.udp_shutdown = esp_shutdown,
.udp_send_probes = esp_send_probes_gp,
.udp_catch_probe = esp_catch_probe_gp,
#endif
},
{ /* NULL */ }
};
int openconnect_get_supported_protocols(struct oc_vpn_proto **protos)
{
struct oc_vpn_proto *pr;
const struct vpn_proto *p;
*protos = pr = calloc(sizeof(openconnect_protos)/sizeof(*openconnect_protos), sizeof(*pr));
if (!pr)
return -ENOMEM;
for (p = openconnect_protos; p->name; p++, pr++) {
pr->name = p->name;
pr->pretty_name = p->pretty_name;
pr->description = p->description;
pr->flags = p->flags;
}
return (p - openconnect_protos);
}
void openconnect_free_supported_protocols(struct oc_vpn_proto *protos)
{
free((void *)protos);
}
int openconnect_set_protocol(struct openconnect_info *vpninfo, const char *protocol)
{
const struct vpn_proto *p;
for (p = openconnect_protos; p->name; p++) {
if (strcasecmp(p->name, protocol))
continue;
vpninfo->proto = p;
if (!p->udp_setup)
vpninfo->dtls_state = DTLS_DISABLED;
return 0;
}
vpn_progress(vpninfo, PRG_ERR,
_("Unknown VPN protocol '%s'\n"), protocol);
return -EINVAL;
}
void openconnect_set_pass_tos(struct openconnect_info *vpninfo, int enable)
{
vpninfo->dtls_pass_tos = enable;
}
void openconnect_set_loglevel(struct openconnect_info *vpninfo, int level)
{
vpninfo->verbose = level;
}
int openconnect_setup_dtls(struct openconnect_info *vpninfo,
int attempt_period)
{
if (vpninfo->proto->udp_setup)
return vpninfo->proto->udp_setup(vpninfo, attempt_period);
vpn_progress(vpninfo, PRG_ERR,
_("Built against SSL library with no Cisco DTLS support\n"));
return -EINVAL;
}
int openconnect_obtain_cookie(struct openconnect_info *vpninfo)
{
return vpninfo->proto->obtain_cookie(vpninfo);
}
int openconnect_make_cstp_connection(struct openconnect_info *vpninfo)
{
return vpninfo->proto->tcp_connect(vpninfo);
}
int openconnect_set_reported_os(struct openconnect_info *vpninfo,
const char *os)
{
if (!os) {
#if defined(__APPLE__)
os = "mac-intel";
#elif defined(__ANDROID__)
os = "android";
#else
os = sizeof(long) > 4 ? "linux-64" : "linux";
#endif
}
if (!strcmp(os, "mac-intel"))
vpninfo->csd_xmltag = "csdMac";
else if (!strcmp(os, "linux") || !strcmp(os, "linux-64"))
vpninfo->csd_xmltag = "csdLinux";
else if (!strcmp(os, "android") || !strcmp(os, "apple-ios")) {
vpninfo->csd_xmltag = "csdLinux";
vpninfo->csd_nostub = 1;
} else if (!strcmp(os, "win"))
vpninfo->csd_xmltag = "csd";
else
return -EINVAL;
STRDUP(vpninfo->platname, os);
return 0;
}
int openconnect_set_mobile_info(struct openconnect_info *vpninfo,
const char *mobile_platform_version,
const char *mobile_device_type,
const char *mobile_device_uniqueid)
{
STRDUP(vpninfo->mobile_platform_version, mobile_platform_version);
STRDUP(vpninfo->mobile_device_type, mobile_device_type);
STRDUP(vpninfo->mobile_device_uniqueid, mobile_device_uniqueid);
return 0;
}
void free_optlist(struct oc_vpn_option *opt)
{
struct oc_vpn_option *next;
for (; opt; opt = next) {
next = opt->next;
free(opt->option);
free(opt->value);
free(opt);
}
}
void openconnect_vpninfo_free(struct openconnect_info *vpninfo)
{
openconnect_close_https(vpninfo, 1);
if (vpninfo->proto->udp_shutdown)
vpninfo->proto->udp_shutdown(vpninfo);
if (vpninfo->tncc_fd != -1)
closesocket(vpninfo->tncc_fd);
if (vpninfo->cmd_fd_write != -1) {
closesocket(vpninfo->cmd_fd);
closesocket(vpninfo->cmd_fd_write);
}
#ifdef HAVE_ICONV
if (vpninfo->ic_utf8_to_legacy != (iconv_t)-1)
iconv_close(vpninfo->ic_utf8_to_legacy);
if (vpninfo->ic_legacy_to_utf8 != (iconv_t)-1)
iconv_close(vpninfo->ic_legacy_to_utf8);
#endif
#ifdef _WIN32
if (vpninfo->cmd_event)
CloseHandle(vpninfo->cmd_event);
if (vpninfo->ssl_event)
CloseHandle(vpninfo->ssl_event);
if (vpninfo->dtls_event)
CloseHandle(vpninfo->dtls_event);
#endif
free(vpninfo->peer_addr);
free(vpninfo->ip_info.gateway_addr);
free_optlist(vpninfo->csd_env);
free_optlist(vpninfo->script_env);
free_optlist(vpninfo->cookies);
free_optlist(vpninfo->cstp_options);
free_optlist(vpninfo->dtls_options);
free_split_routes(vpninfo);
free(vpninfo->hostname);
free(vpninfo->unique_hostname);
free(vpninfo->urlpath);
free(vpninfo->redirect_url);
free(vpninfo->cookie);
free(vpninfo->proxy_type);
free(vpninfo->proxy);
free(vpninfo->proxy_user);
free(vpninfo->proxy_pass);
free(vpninfo->vpnc_script);
free(vpninfo->cafile);
free(vpninfo->ifname);
free(vpninfo->dtls_cipher);
#ifdef OPENCONNECT_GNUTLS
gnutls_free(vpninfo->cstp_cipher); /* In OpenSSL this is const */
#ifdef HAVE_DTLS
gnutls_free(vpninfo->gnutls_dtls_cipher);
#endif
#endif
free(vpninfo->dtls_addr);
if (vpninfo->csd_scriptname) {
unlink(vpninfo->csd_scriptname);
free(vpninfo->csd_scriptname);
}
free(vpninfo->mobile_platform_version);
free(vpninfo->mobile_device_type);
free(vpninfo->mobile_device_uniqueid);
free(vpninfo->csd_token);
free(vpninfo->csd_ticket);
free(vpninfo->csd_stuburl);
free(vpninfo->csd_starturl);
free(vpninfo->csd_waiturl);
free(vpninfo->csd_preurl);
free(vpninfo->platname);
if (vpninfo->opaque_srvdata)
xmlFreeNode(vpninfo->opaque_srvdata);
free(vpninfo->profile_url);
free(vpninfo->profile_sha1);
/* These are const in openconnect itself, but for consistency of
the library API we do take ownership of the strings we're given,
and thus we have to free them too. */
if (vpninfo->cert != vpninfo->sslkey)
free((void *)vpninfo->sslkey);
free((void *)vpninfo->cert);
if (vpninfo->peer_cert) {
#if defined(OPENCONNECT_OPENSSL)
X509_free(vpninfo->peer_cert);
#elif defined(OPENCONNECT_GNUTLS)
gnutls_x509_crt_deinit(vpninfo->peer_cert);
#endif
vpninfo->peer_cert = NULL;
}
while (vpninfo->pin_cache) {
struct pin_cache *cache = vpninfo->pin_cache;
free(cache->token);
memset(cache->pin, 0x5a, strlen(cache->pin));
free(cache->pin);
vpninfo->pin_cache = cache->next;
free(cache);
}
free(vpninfo->localname);
free(vpninfo->useragent);
free(vpninfo->authgroup);
#ifdef HAVE_LIBSTOKEN
if (vpninfo->stoken_pin)
free(vpninfo->stoken_pin);
if (vpninfo->stoken_ctx)
stoken_destroy(vpninfo->stoken_ctx);
#endif
if (vpninfo->oath_secret) {
#ifdef HAVE_LIBPSKC
if (vpninfo->pskc)
pskc_done(vpninfo->pskc);
else
#endif /* HAVE_LIBPSKC */
free(vpninfo->oath_secret);
}
#ifdef HAVE_LIBPCSCLITE
if (vpninfo->token_mode == OC_TOKEN_MODE_YUBIOATH) {
SCardDisconnect(vpninfo->pcsc_card, SCARD_LEAVE_CARD);
SCardReleaseContext(vpninfo->pcsc_ctx);
}
memset(vpninfo->yubikey_pwhash, 0, sizeof(vpninfo->yubikey_pwhash));
free(vpninfo->yubikey_objname);
#endif
#ifdef HAVE_LIBP11
if (vpninfo->pkcs11_ctx) {
if (vpninfo->pkcs11_slot_list)
PKCS11_release_all_slots(vpninfo->pkcs11_ctx,
vpninfo->pkcs11_slot_list,
vpninfo->pkcs11_slot_count);
PKCS11_CTX_unload(vpninfo->pkcs11_ctx);
PKCS11_CTX_free(vpninfo->pkcs11_ctx);
}
free(vpninfo->pkcs11_cert_id);
#endif
/* These check strm->state so they are safe to call multiple times */
inflateEnd(&vpninfo->inflate_strm);
deflateEnd(&vpninfo->deflate_strm);
free(vpninfo->deflate_pkt);
free(vpninfo->tun_pkt);
free(vpninfo->dtls_pkt);
free(vpninfo->cstp_pkt);
free(vpninfo);
}
const char *openconnect_get_hostname(struct openconnect_info *vpninfo)
{
return vpninfo->unique_hostname?:vpninfo->hostname;
}
const char *openconnect_get_dnsname(struct openconnect_info *vpninfo)
{
return vpninfo->hostname;
}
int openconnect_set_hostname(struct openconnect_info *vpninfo,
const char *hostname)
{
UTF8CHECK(hostname);
STRDUP(vpninfo->hostname, hostname);
free(vpninfo->unique_hostname);
vpninfo->unique_hostname = NULL;
free(vpninfo->peer_addr);
vpninfo->peer_addr = NULL;
free(vpninfo->ip_info.gateway_addr);
vpninfo->ip_info.gateway_addr = NULL;
return 0;
}
char *openconnect_get_urlpath(struct openconnect_info *vpninfo)
{
return vpninfo->urlpath;
}
int openconnect_set_urlpath(struct openconnect_info *vpninfo,
const char *urlpath)
{
UTF8CHECK(urlpath);
STRDUP(vpninfo->urlpath, urlpath);
return 0;
}
int openconnect_set_localname(struct openconnect_info *vpninfo,
const char *localname)
{
UTF8CHECK(localname);
STRDUP(vpninfo->localname, localname);
return 0;
}
void openconnect_set_xmlsha1(struct openconnect_info *vpninfo,
const char *xmlsha1, int size)
{
if (size != sizeof(vpninfo->xmlsha1))
return;
memcpy(&vpninfo->xmlsha1, xmlsha1, size);
}
void openconnect_disable_ipv6(struct openconnect_info *vpninfo)
{
vpninfo->disable_ipv6 = 1;
}
int openconnect_set_cafile(struct openconnect_info *vpninfo, const char *cafile)
{
UTF8CHECK(cafile);
STRDUP(vpninfo->cafile, cafile);
return 0;
}
void openconnect_set_system_trust(struct openconnect_info *vpninfo, unsigned val)
{
vpninfo->no_system_trust = !val;
}
const char *openconnect_get_ifname(struct openconnect_info *vpninfo)
{
return vpninfo->ifname;
}
void openconnect_set_reqmtu(struct openconnect_info *vpninfo, int reqmtu)
{
vpninfo->reqmtu = reqmtu;
}
void openconnect_set_dpd(struct openconnect_info *vpninfo, int min_seconds)
{
/* Make sure (ka->dpd / 2), our computed midway point, isn't 0 */
if (!min_seconds || min_seconds >= 2)
vpninfo->dtls_times.dpd = vpninfo->ssl_times.dpd = min_seconds;
else if (min_seconds == 1)
vpninfo->dtls_times.dpd = vpninfo->ssl_times.dpd = 2;
}
int openconnect_get_ip_info(struct openconnect_info *vpninfo,
const struct oc_ip_info **info,
const struct oc_vpn_option **cstp_options,
const struct oc_vpn_option **dtls_options)
{
if (info)
*info = &vpninfo->ip_info;
if (cstp_options)
*cstp_options = vpninfo->cstp_options;
if (dtls_options)
*dtls_options = vpninfo->dtls_options;
return 0;
}
int openconnect_setup_csd(struct openconnect_info *vpninfo, uid_t uid,
int silent, const char *wrapper)
{
#ifndef _WIN32
vpninfo->uid_csd = uid;
vpninfo->uid_csd_given = silent ? 2 : 1;
#endif
STRDUP(vpninfo->csd_wrapper, wrapper);
return 0;
}
void openconnect_set_xmlpost(struct openconnect_info *vpninfo, int enable)
{
vpninfo->xmlpost = enable;
}
int openconnect_set_client_cert(struct openconnect_info *vpninfo,
const char *cert, const char *sslkey)
{
UTF8CHECK(cert);
UTF8CHECK(sslkey);
/* Avoid freeing it twice if it's the same */
if (vpninfo->sslkey == vpninfo->cert)
vpninfo->sslkey = NULL;
STRDUP(vpninfo->cert, cert);
if (sslkey) {
STRDUP(vpninfo->sslkey, sslkey);
} else {
vpninfo->sslkey = vpninfo->cert;
}
return 0;
}
int openconnect_get_port(struct openconnect_info *vpninfo)
{
return vpninfo->port;
}
const char *openconnect_get_cookie(struct openconnect_info *vpninfo)
{
return vpninfo->cookie;
}
void openconnect_clear_cookie(struct openconnect_info *vpninfo)
{
if (vpninfo->cookie)
memset(vpninfo->cookie, 0, strlen(vpninfo->cookie));
}
void openconnect_reset_ssl(struct openconnect_info *vpninfo)
{
vpninfo->got_cancel_cmd = 0;
openconnect_close_https(vpninfo, 0);
free(vpninfo->peer_addr);
vpninfo->peer_addr = NULL;
vpninfo->dtls_tos_optname = 0;
free(vpninfo->ip_info.gateway_addr);
vpninfo->ip_info.gateway_addr = NULL;
openconnect_clear_cookies(vpninfo);
}
int openconnect_parse_url(struct openconnect_info *vpninfo, const char *url)
{
char *scheme = NULL;
int ret;
UTF8CHECK(url);
openconnect_set_hostname(vpninfo, NULL);
free(vpninfo->urlpath);
vpninfo->urlpath = NULL;
ret = internal_parse_url(url, &scheme, &vpninfo->hostname,
&vpninfo->port, &vpninfo->urlpath, 443);
if (ret) {
vpn_progress(vpninfo, PRG_ERR,
_("Failed to parse server URL '%s'\n"),
url);
return ret;
}
if (scheme && strcmp(scheme, "https")) {
vpn_progress(vpninfo, PRG_ERR,
_("Only https:// permitted for server URL\n"));
ret = -EINVAL;
}
free(scheme);
return ret;
}
void openconnect_set_cert_expiry_warning(struct openconnect_info *vpninfo,
int seconds)
{
vpninfo->cert_expire_warning = seconds;
}
void openconnect_set_pfs(struct openconnect_info *vpninfo, unsigned val)
{
vpninfo->pfs = val;
}
void openconnect_set_cancel_fd(struct openconnect_info *vpninfo, int fd)
{
vpninfo->cmd_fd = fd;
}
#ifdef _WIN32
# define CMD_PIPE_ERR INVALID_SOCKET
#else
# define CMD_PIPE_ERR -EIO
#endif
OPENCONNECT_CMD_SOCKET openconnect_setup_cmd_pipe(struct openconnect_info *vpninfo)
{
OPENCONNECT_CMD_SOCKET pipefd[2];
#ifdef _WIN32
if (dumb_socketpair(pipefd, 0))
return CMD_PIPE_ERR;
#else
if (pipe(pipefd) < 0)
return CMD_PIPE_ERR;
#endif
if (set_sock_nonblock(pipefd[0]) || set_sock_nonblock(pipefd[1])) {
closesocket(pipefd[0]);
closesocket(pipefd[1]);
return CMD_PIPE_ERR;
}
vpninfo->cmd_fd = pipefd[0];
vpninfo->cmd_fd_write = pipefd[1];
return vpninfo->cmd_fd_write;
}
const char *openconnect_get_version(void)
{
return openconnect_version_str;
}
int openconnect_has_pkcs11_support(void)
{
#if defined(OPENCONNECT_GNUTLS) && defined(HAVE_P11KIT)
return 1;
#elif defined(OPENCONNECT_OPENSSL) && defined(HAVE_LIBP11)
return 1;
#else
return 0;
#endif
}
#if defined(OPENCONNECT_OPENSSL) && defined(HAVE_ENGINE)
#include <openssl/engine.h>
#endif
int openconnect_has_tss_blob_support(void)
{
#if defined(OPENCONNECT_OPENSSL) && defined(HAVE_ENGINE)
ENGINE *e;
ENGINE_load_builtin_engines();
e = ENGINE_by_id("tpm");
if (e) {
ENGINE_free(e);
return 1;
}
#elif defined(OPENCONNECT_GNUTLS) && defined(HAVE_TROUSERS)
return 1;
#endif
return 0;
}
int openconnect_has_stoken_support(void)
{
#ifdef HAVE_LIBSTOKEN
return 1;
#else
return 0;
#endif
}
int openconnect_has_oath_support(void)
{
return 2;
}
int openconnect_has_yubioath_support(void)
{
#ifdef HAVE_LIBPCSCLITE
return 1;
#else
return 0;
#endif
}
int openconnect_has_system_key_support(void)
{
#ifdef HAVE_GNUTLS_SYSTEM_KEYS
return 1;
#else
return 0;
#endif
}
int openconnect_set_token_callbacks(struct openconnect_info *vpninfo,
void *tokdata,
openconnect_lock_token_vfn lock,
openconnect_unlock_token_vfn unlock)
{
vpninfo->lock_token = lock;
vpninfo->unlock_token = unlock;
vpninfo->tok_cbdata = tokdata;
return 0;
}
/*
* Enable software token generation.
*
* If token_mode is OC_TOKEN_MODE_STOKEN and token_str is NULL,
* read the token data from ~/.stokenrc.
*
* Return value:
* = -EILSEQ, if token_str is not valid UTF-8
* = -EOPNOTSUPP, if the underlying library (libstoken, liboath) is not
* available or an invalid token_mode was provided
* = -EINVAL, if the token string is invalid (token_str was provided)
* = -ENOENT, if token_mode is OC_TOKEN_MODE_STOKEN and ~/.stokenrc is
* missing (token_str was NULL)
* = -EIO, for other failures in the underlying library (libstoken, liboath)
* = 0, on success
*/
int openconnect_set_token_mode(struct openconnect_info *vpninfo,
oc_token_mode_t token_mode,
const char *token_str)
{
vpninfo->token_mode = OC_TOKEN_MODE_NONE;
UTF8CHECK(token_str);
switch (token_mode) {
case OC_TOKEN_MODE_NONE:
return 0;
#ifdef HAVE_LIBSTOKEN
case OC_TOKEN_MODE_STOKEN:
return set_libstoken_mode(vpninfo, token_str);
#endif
case OC_TOKEN_MODE_TOTP:
return set_totp_mode(vpninfo, token_str);
case OC_TOKEN_MODE_HOTP:
return set_hotp_mode(vpninfo, token_str);
#ifdef HAVE_LIBPCSCLITE
case OC_TOKEN_MODE_YUBIOATH:
return set_yubikey_mode(vpninfo, token_str);
#endif
default:
return -EOPNOTSUPP;
}
}
/*
* Enable libstoken token generation if use_stoken == 1.
*
* If token_str is not NULL, try to parse the string. Otherwise, try to read
* the token data from ~/.stokenrc
*
* DEPRECATED: use openconnect_set_stoken_mode() instead.
*
* Return value:
* = -EILSEQ, if token_str is not valid UTF-8
* = -EOPNOTSUPP, if libstoken is not available
* = -EINVAL, if the token string is invalid (token_str was provided)
* = -ENOENT, if ~/.stokenrc is missing (token_str was NULL)
* = -EIO, for other libstoken failures
* = 0, on success
*/
int openconnect_set_stoken_mode(struct openconnect_info *vpninfo,
int use_stoken, const char *token_str)
{
oc_token_mode_t token_mode = OC_TOKEN_MODE_NONE;
if (use_stoken)
token_mode = OC_TOKEN_MODE_STOKEN;
return openconnect_set_token_mode(vpninfo, token_mode, token_str);
}
void openconnect_set_protect_socket_handler(struct openconnect_info *vpninfo,
openconnect_protect_socket_vfn protect_socket)
{
vpninfo->protect_socket = protect_socket;
}
void openconnect_override_getaddrinfo(struct openconnect_info *vpninfo, openconnect_getaddrinfo_vfn gai_fn)
{
vpninfo->getaddrinfo_override = gai_fn;
}
void openconnect_set_setup_tun_handler(struct openconnect_info *vpninfo,
openconnect_setup_tun_vfn setup_tun)
{
vpninfo->setup_tun = setup_tun;
}
void openconnect_set_reconnected_handler(struct openconnect_info *vpninfo,
openconnect_reconnected_vfn reconnected)
{
vpninfo->reconnected = reconnected;
}
void openconnect_set_stats_handler(struct openconnect_info *vpninfo,
openconnect_stats_vfn stats_handler)
{
vpninfo->stats_handler = stats_handler;
}
/* Set up a traditional OS-based tunnel device, optionally specified in 'ifname'. */
int openconnect_setup_tun_device(struct openconnect_info *vpninfo,
const char *vpnc_script, const char *ifname)
{
intptr_t tun_fd;
char *legacy_ifname;
UTF8CHECK(vpnc_script);
UTF8CHECK(ifname);
STRDUP(vpninfo->vpnc_script, vpnc_script);
STRDUP(vpninfo->ifname, ifname);
prepare_script_env(vpninfo);
script_config_tun(vpninfo, "pre-init");
tun_fd = os_setup_tun(vpninfo);
if (tun_fd < 0)
return tun_fd;
#ifdef _WIN32
if (vpninfo->tun_idx != -1)
script_setenv_int(vpninfo, "TUNIDX", vpninfo->tun_idx);
#endif
legacy_ifname = openconnect_utf8_to_legacy(vpninfo, vpninfo->ifname);
script_setenv(vpninfo, "TUNDEV", legacy_ifname, 0);
if (legacy_ifname != vpninfo->ifname)
free(legacy_ifname);
script_config_tun(vpninfo, "connect");
return openconnect_setup_tun_fd(vpninfo, tun_fd);
}
static const char *compr_name_map[] = {
[COMPR_DEFLATE] = "Deflate",
[COMPR_LZS] = "LZS",
[COMPR_LZ4] = "LZ4"
};
const char *openconnect_get_cstp_compression(struct openconnect_info * vpninfo)
{
if (vpninfo->cstp_compr <= 0 || vpninfo->cstp_compr > COMPR_MAX)
return NULL;
return compr_name_map[vpninfo->cstp_compr];
}
const char *openconnect_get_dtls_compression(struct openconnect_info * vpninfo)
{
if (vpninfo->dtls_compr <= 0 || vpninfo->dtls_compr > COMPR_MAX)
return NULL;
return compr_name_map[vpninfo->dtls_compr];
}
const char *openconnect_get_dtls_cipher(struct openconnect_info *vpninfo)
{
#if defined(OPENCONNECT_GNUTLS)
if (vpninfo->dtls_state != DTLS_CONNECTED) {
gnutls_free(vpninfo->gnutls_dtls_cipher);
vpninfo->gnutls_dtls_cipher = NULL;
return NULL;
}
/* in DTLS rehandshakes don't switch the ciphersuite as only
* one is enabled. */
if (vpninfo->gnutls_dtls_cipher == NULL)
vpninfo->gnutls_dtls_cipher = get_gnutls_cipher(vpninfo->dtls_ssl);
return vpninfo->gnutls_dtls_cipher;
#else
if (vpninfo->dtls_ssl)
return SSL_get_cipher(vpninfo->dtls_ssl);
else
return NULL;
#endif
}
int openconnect_set_csd_environ(struct openconnect_info *vpninfo,
const char *name, const char *value)
{
struct oc_vpn_option *p;
if (!name) {
free_optlist(vpninfo->csd_env);
vpninfo->csd_env = NULL;
return 0;
}
for (p = vpninfo->csd_env; p; p = p->next) {
if (!strcmp(name, p->option)) {
char *valdup = strdup(value);
if (!valdup)
return -ENOMEM;
free(p->value);
p->value = valdup;
return 0;
}
}
p = malloc(sizeof(*p));
if (!p)
return -ENOMEM;
p->option = strdup(name);
if (!p->option) {
free(p);
return -ENOMEM;
}
p->value = strdup(value);
if (!p->value) {
free(p->option);
free(p);
return -ENOMEM;
}
p->next = vpninfo->csd_env;
vpninfo->csd_env = p;
return 0;
}
int openconnect_check_peer_cert_hash(struct openconnect_info *vpninfo,
const char *old_hash)
{
char *fingerprint = NULL;
unsigned min_match_len;
unsigned real_min_match_len = 4;
unsigned old_len, fingerprint_len;
if (strchr(old_hash, ':')) {
if (strncmp(old_hash, "sha1:", 5) == 0) {
fingerprint = openconnect_bin2hex("sha1:", vpninfo->peer_cert_sha1_raw, sizeof(vpninfo->peer_cert_sha1_raw));
min_match_len = real_min_match_len + sizeof("sha1:")-1;
} else if (strncmp(old_hash, "sha256:", 7) == 0) {
fingerprint = openconnect_bin2hex("sha256:", vpninfo->peer_cert_sha256_raw, sizeof(vpninfo->peer_cert_sha256_raw));
min_match_len = real_min_match_len + sizeof("sha256:")-1;