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- Committer: Teddy Hogeborn
- Date: 2014-03-10 06:55:54 UTC
- Revision ID: teddy@recompile.se-20140310065554-of3kz8jdhlll42l3
Use "struct sockaddr_storage" instead of a union in mandos-client.
Apparently using struct sockaddr_storage the way POSIX intended is
incompatible with strict aliasing, so turn that off in the Makefile.
* plugins.d/mandos-client.c (start_mandos_communication): Change "to"
from a union
to a struct
sockaddr_storage.
* Makefile (OPTIMIZE): Add "-fno-strict-aliasing".
Apparently using struct sockaddr_storage the way POSIX intended is
incompatible with strict aliasing, so turn that off in the Makefile.
* plugins.d/mandos-client.c (start_mandos_communication): Change "to"
from a union
to a struct
sockaddr_storage.
* Makefile (OPTIMIZE): Add "-fno-strict-aliasing".
- files added:
- debian/upstream-signing-key.pgp
- files removed:
- bugs.xml
- debian/upstream
- plugin-helpers
- files modified:
- DBUS-API
added
removed
plugins.d/mandos-client.c
9
9
* "browse_callback", and parts of "main".
10
10
*
11
11
* Everything else is
12
* Copyright © 2008-2018 Teddy Hogeborn
13
* Copyright © 2008-2018 Björn Påhlsson
14
*
15
* This file is part of Mandos.
16
*
17
* Mandos is free software: you can redistribute it and/or modify it
18
* under the terms of the GNU General Public License as published by
19
* the Free Software Foundation, either version 3 of the License, or
20
* (at your option) any later version.
21
*
22
* Mandos is distributed in the hope that it will be useful, but
12
* Copyright © 2008-2013 Teddy Hogeborn
13
* Copyright © 2008-2013 Björn Påhlsson
14
*
15
* This program is free software: you can redistribute it and/or
16
* modify it under the terms of the GNU General Public License as
17
* published by the Free Software Foundation, either version 3 of the
18
* License, or (at your option) any later version.
19
*
20
* This program is distributed in the hope that it will be useful, but
23
21
* WITHOUT ANY WARRANTY; without even the implied warranty of
24
22
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
25
23
* General Public License for more details.
26
24
*
27
25
* You should have received a copy of the GNU General Public License
28
* along with Mandos. If not, see <http://www.gnu.org/licenses/>.
26
* along with this program. If not, see
27
* <http://www.gnu.org/licenses/>.
29
28
*
30
29
* Contact the authors at <mandos@recompile.se>.
31
30
*/
33
32
/* Needed by GPGME, specifically gpgme_data_seek() */
34
33
#ifndef _LARGEFILE_SOURCE
35
34
#define _LARGEFILE_SOURCE
36
#endif /* not _LARGEFILE_SOURCE */
35
#endif
37
36
#ifndef _FILE_OFFSET_BITS
38
37
#define _FILE_OFFSET_BITS 64
39
#endif /* not _FILE_OFFSET_BITS */
38
#endif
40
39
41
40
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), asprintf() */
42
41
43
42
#include <stdio.h> /* fprintf(), stderr, fwrite(),
44
stdout, ferror() */
43
stdout, ferror(), remove() */
45
44
#include <stdint.h> /* uint16_t, uint32_t, intptr_t */
46
45
#include <stddef.h> /* NULL, size_t, ssize_t */
47
46
#include <stdlib.h> /* free(), EXIT_SUCCESS, srand(),
48
47
strtof(), abort() */
49
48
#include <stdbool.h> /* bool, false, true */
50
#include <string.h> /* strcmp(), strlen(), strerror(),
51
asprintf(), strncpy(), strsignal()
52
*/
49
#include <string.h> /* memset(), strcmp(), strlen(),
50
strerror(), asprintf(), strcpy() */
53
51
#include <sys/ioctl.h> /* ioctl */
54
52
#include <sys/types.h> /* socket(), inet_pton(), sockaddr,
55
53
sockaddr_in6, PF_INET6,
59
57
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
60
58
inet_pton(), connect(),
61
59
getnameinfo() */
62
#include <fcntl.h> /* open(), unlinkat(), AT_REMOVEDIR */
60
#include <fcntl.h> /* open() */
63
61
#include <dirent.h> /* opendir(), struct dirent, readdir()
64
62
*/
65
63
#include <inttypes.h> /* PRIu16, PRIdMAX, intmax_t,
66
64
strtoimax() */
67
#include <errno.h> /* perror(), errno, EINTR, EINVAL,
68
EAI_SYSTEM, ENETUNREACH,
69
EHOSTUNREACH, ECONNREFUSED, EPROTO,
70
EIO, ENOENT, ENXIO, ENOMEM, EISDIR,
71
ENOTEMPTY,
65
#include <errno.h> /* perror(), errno,
72
66
program_invocation_short_name */
73
67
#include <time.h> /* nanosleep(), time(), sleep() */
74
68
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
79
73
*/
80
74
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
81
75
getuid(), getgid(), seteuid(),
82
setgid(), pause(), _exit(),
83
unlinkat() */
76
setgid(), pause(), _exit() */
84
77
#include <arpa/inet.h> /* inet_pton(), htons() */
85
78
#include <iso646.h> /* not, or, and */
86
79
#include <argp.h> /* struct argp_option, error_t, struct
148
141
static const char sys_class_net[] = "/sys/class/net";
149
142
char *connect_to = NULL;
150
143
const char *hookdir = HOOKDIR;
151
int hookdir_fd = -1;
152
144
uid_t uid = 65534;
153
145
gid_t gid = 65534;
154
146
191
183
perror(print_text);
192
184
}
193
185
194
__attribute__((format (gnu_printf, 2, 3), nonnull))
186
__attribute__((format (gnu_printf, 2, 3)))
195
187
int fprintf_plus(FILE *stream, const char *format, ...){
196
188
va_list ap;
197
189
va_start (ap, format);
206
198
* bytes. "buffer_capacity" is how much is currently allocated,
207
199
* "buffer_length" is how much is already used.
208
200
*/
209
__attribute__((nonnull, warn_unused_result))
210
201
size_t incbuffer(char **buffer, size_t buffer_length,
211
202
size_t buffer_capacity){
212
203
if(buffer_length + BUFFER_SIZE > buffer_capacity){
225
216
}
226
217
227
218
/* Add server to set of servers to retry periodically */
228
__attribute__((nonnull, warn_unused_result))
229
219
bool add_server(const char *ip, in_port_t port, AvahiIfIndex if_index,
230
220
int af, server **current_server){
231
221
int ret;
240
230
.af = af };
241
231
if(new_server->ip == NULL){
242
232
perror_plus("strdup");
243
free(new_server);
244
233
return false;
245
234
}
246
235
ret = clock_gettime(CLOCK_MONOTONIC, &(new_server->last_seen));
247
236
if(ret == -1){
248
237
perror_plus("clock_gettime");
249
#ifdef __GNUC__
250
#pragma GCC diagnostic push
251
#pragma GCC diagnostic ignored "-Wcast-qual"
252
#endif
253
free((char *)(new_server->ip));
254
#ifdef __GNUC__
255
#pragma GCC diagnostic pop
256
#endif
257
free(new_server);
258
238
return false;
259
239
}
260
240
/* Special case of first server */
262
242
new_server->next = new_server;
263
243
new_server->prev = new_server;
264
244
*current_server = new_server;
245
/* Place the new server last in the list */
265
246
} else {
266
/* Place the new server last in the list */
267
247
new_server->next = *current_server;
268
248
new_server->prev = (*current_server)->prev;
269
249
new_server->prev->next = new_server;
275
255
/*
276
256
* Initialize GPGME.
277
257
*/
278
__attribute__((nonnull, warn_unused_result))
279
static bool init_gpgme(const char * const seckey,
280
const char * const pubkey,
281
const char * const tempdir,
282
mandos_context *mc){
258
static bool init_gpgme(const char *seckey, const char *pubkey,
259
const char *tempdir, mandos_context *mc){
283
260
gpgme_error_t rc;
284
261
gpgme_engine_info_t engine_info;
285
262
286
263
/*
287
264
* Helper function to insert pub and seckey to the engine keyring.
288
265
*/
289
bool import_key(const char * const filename){
266
bool import_key(const char *filename){
290
267
int ret;
291
268
int fd;
292
269
gpgme_data_t pgp_data;
311
288
return false;
312
289
}
313
290
314
ret = close(fd);
291
ret = (int)TEMP_FAILURE_RETRY(close(fd));
315
292
if(ret == -1){
316
293
perror_plus("close");
317
294
}
373
350
* Decrypt OpenPGP data.
374
351
* Returns -1 on error
375
352
*/
376
__attribute__((nonnull, warn_unused_result))
377
353
static ssize_t pgp_packet_decrypt(const char *cryptotext,
378
354
size_t crypto_size,
379
355
char **plaintext,
499
475
return plaintext_length;
500
476
}
501
477
502
__attribute__((warn_unused_result, const))
503
static const char *safe_string(const char *str){
504
if(str == NULL)
505
return "(unknown)";
506
return str;
507
}
508
509
__attribute__((warn_unused_result))
510
static const char *safer_gnutls_strerror(int value){
478
static const char * safer_gnutls_strerror(int value){
511
479
const char *ret = gnutls_strerror(value);
512
return safe_string(ret);
480
if(ret == NULL)
481
ret = "(unknown)";
482
return ret;
513
483
}
514
484
515
485
/* GnuTLS log function callback */
516
__attribute__((nonnull))
517
486
static void debuggnutls(__attribute__((unused)) int level,
518
487
const char* string){
519
488
fprintf_plus(stderr, "GnuTLS: %s", string);
520
489
}
521
490
522
__attribute__((nonnull(1, 2, 4), warn_unused_result))
523
491
static int init_gnutls_global(const char *pubkeyfilename,
524
492
const char *seckeyfilename,
525
const char *dhparamsfilename,
526
493
mandos_context *mc){
527
494
int ret;
528
unsigned int uret;
529
495
530
496
if(debug){
531
497
fprintf_plus(stderr, "Initializing GnuTLS\n");
532
498
}
533
499
500
ret = gnutls_global_init();
501
if(ret != GNUTLS_E_SUCCESS){
502
fprintf_plus(stderr, "GnuTLS global_init: %s\n",
503
safer_gnutls_strerror(ret));
504
return -1;
505
}
506
534
507
if(debug){
535
508
/* "Use a log level over 10 to enable all debugging options."
536
509
* - GnuTLS manual
544
517
if(ret != GNUTLS_E_SUCCESS){
545
518
fprintf_plus(stderr, "GnuTLS memory error: %s\n",
546
519
safer_gnutls_strerror(ret));
520
gnutls_global_deinit();
547
521
return -1;
548
522
}
549
523
574
548
safer_gnutls_strerror(ret));
575
549
goto globalfail;
576
550
}
577
/* If a Diffie-Hellman parameters file was given, try to use it */
578
if(dhparamsfilename != NULL){
579
gnutls_datum_t params = { .data = NULL, .size = 0 };
580
do {
581
int dhpfile = open(dhparamsfilename, O_RDONLY);
582
if(dhpfile == -1){
583
perror_plus("open");
584
dhparamsfilename = NULL;
585
break;
586
}
587
size_t params_capacity = 0;
588
while(true){
589
params_capacity = incbuffer((char **)¶ms.data,
590
(size_t)params.size,
591
(size_t)params_capacity);
592
if(params_capacity == 0){
593
perror_plus("incbuffer");
594
free(params.data);
595
params.data = NULL;
596
dhparamsfilename = NULL;
597
break;
598
}
599
ssize_t bytes_read = read(dhpfile,
600
params.data + params.size,
601
BUFFER_SIZE);
602
/* EOF */
603
if(bytes_read == 0){
604
break;
605
}
606
/* check bytes_read for failure */
607
if(bytes_read < 0){
608
perror_plus("read");
609
free(params.data);
610
params.data = NULL;
611
dhparamsfilename = NULL;
612
break;
613
}
614
params.size += (unsigned int)bytes_read;
615
}
616
if(params.data == NULL){
617
dhparamsfilename = NULL;
618
}
619
if(dhparamsfilename == NULL){
620
break;
621
}
622
ret = gnutls_dh_params_import_pkcs3(mc->dh_params, ¶ms,
623
GNUTLS_X509_FMT_PEM);
624
if(ret != GNUTLS_E_SUCCESS){
625
fprintf_plus(stderr, "Failed to parse DH parameters in file"
626
" \"%s\": %s\n", dhparamsfilename,
627
safer_gnutls_strerror(ret));
628
dhparamsfilename = NULL;
629
}
630
free(params.data);
631
} while(false);
632
}
633
if(dhparamsfilename == NULL){
634
if(mc->dh_bits == 0){
635
/* Find out the optimal number of DH bits */
636
/* Try to read the private key file */
637
gnutls_datum_t buffer = { .data = NULL, .size = 0 };
638
do {
639
int secfile = open(seckeyfilename, O_RDONLY);
640
if(secfile == -1){
641
perror_plus("open");
642
break;
643
}
644
size_t buffer_capacity = 0;
645
while(true){
646
buffer_capacity = incbuffer((char **)&buffer.data,
647
(size_t)buffer.size,
648
(size_t)buffer_capacity);
649
if(buffer_capacity == 0){
650
perror_plus("incbuffer");
651
free(buffer.data);
652
buffer.data = NULL;
653
break;
654
}
655
ssize_t bytes_read = read(secfile,
656
buffer.data + buffer.size,
657
BUFFER_SIZE);
658
/* EOF */
659
if(bytes_read == 0){
660
break;
661
}
662
/* check bytes_read for failure */
663
if(bytes_read < 0){
664
perror_plus("read");
665
free(buffer.data);
666
buffer.data = NULL;
667
break;
668
}
669
buffer.size += (unsigned int)bytes_read;
670
}
671
close(secfile);
672
} while(false);
673
/* If successful, use buffer to parse private key */
674
gnutls_sec_param_t sec_param = GNUTLS_SEC_PARAM_ULTRA;
675
if(buffer.data != NULL){
676
{
677
gnutls_openpgp_privkey_t privkey = NULL;
678
ret = gnutls_openpgp_privkey_init(&privkey);
679
if(ret != GNUTLS_E_SUCCESS){
680
fprintf_plus(stderr, "Error initializing OpenPGP key"
681
" structure: %s",
682
safer_gnutls_strerror(ret));
683
free(buffer.data);
684
buffer.data = NULL;
685
} else {
686
ret = gnutls_openpgp_privkey_import
687
(privkey, &buffer, GNUTLS_OPENPGP_FMT_BASE64, "", 0);
688
if(ret != GNUTLS_E_SUCCESS){
689
fprintf_plus(stderr, "Error importing OpenPGP key : %s",
690
safer_gnutls_strerror(ret));
691
privkey = NULL;
692
}
693
free(buffer.data);
694
buffer.data = NULL;
695
if(privkey != NULL){
696
/* Use private key to suggest an appropriate
697
sec_param */
698
sec_param = gnutls_openpgp_privkey_sec_param(privkey);
699
gnutls_openpgp_privkey_deinit(privkey);
700
if(debug){
701
fprintf_plus(stderr, "This OpenPGP key implies using"
702
" a GnuTLS security parameter \"%s\".\n",
703
safe_string(gnutls_sec_param_get_name
704
(sec_param)));
705
}
706
}
707
}
708
}
709
if(sec_param == GNUTLS_SEC_PARAM_UNKNOWN){
710
/* Err on the side of caution */
711
sec_param = GNUTLS_SEC_PARAM_ULTRA;
712
if(debug){
713
fprintf_plus(stderr, "Falling back to security parameter"
714
" \"%s\"\n",
715
safe_string(gnutls_sec_param_get_name
716
(sec_param)));
717
}
718
}
719
}
720
uret = gnutls_sec_param_to_pk_bits(GNUTLS_PK_DH, sec_param);
721
if(uret != 0){
722
mc->dh_bits = uret;
723
if(debug){
724
fprintf_plus(stderr, "A \"%s\" GnuTLS security parameter"
725
" implies %u DH bits; using that.\n",
726
safe_string(gnutls_sec_param_get_name
727
(sec_param)),
728
mc->dh_bits);
729
}
730
} else {
731
fprintf_plus(stderr, "Failed to get implied number of DH"
732
" bits for security parameter \"%s\"): %s\n",
733
safe_string(gnutls_sec_param_get_name
734
(sec_param)),
735
safer_gnutls_strerror(ret));
736
goto globalfail;
737
}
738
} else if(debug){
739
fprintf_plus(stderr, "DH bits explicitly set to %u\n",
740
mc->dh_bits);
741
}
742
ret = gnutls_dh_params_generate2(mc->dh_params, mc->dh_bits);
743
if(ret != GNUTLS_E_SUCCESS){
744
fprintf_plus(stderr, "Error in GnuTLS prime generation (%u"
745
" bits): %s\n", mc->dh_bits,
746
safer_gnutls_strerror(ret));
747
goto globalfail;
748
}
749
}
551
ret = gnutls_dh_params_generate2(mc->dh_params, mc->dh_bits);
552
if(ret != GNUTLS_E_SUCCESS){
553
fprintf_plus(stderr, "Error in GnuTLS prime generation: %s\n",
554
safer_gnutls_strerror(ret));
555
goto globalfail;
556
}
557
750
558
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
751
559
752
560
return 0;
754
562
globalfail:
755
563
756
564
gnutls_certificate_free_credentials(mc->cred);
565
gnutls_global_deinit();
757
566
gnutls_dh_params_deinit(mc->dh_params);
758
567
return -1;
759
568
}
760
569
761
__attribute__((nonnull, warn_unused_result))
762
570
static int init_gnutls_session(gnutls_session_t *session,
763
571
mandos_context *mc){
764
572
int ret;
811
619
/* ignore client certificate if any. */
812
620
gnutls_certificate_server_set_request(*session, GNUTLS_CERT_IGNORE);
813
621
622
gnutls_dh_set_prime_bits(*session, mc->dh_bits);
623
814
624
return 0;
815
625
}
816
626
818
628
static void empty_log(__attribute__((unused)) AvahiLogLevel level,
819
629
__attribute__((unused)) const char *txt){}
820
630
821
/* Set effective uid to 0, return errno */
822
__attribute__((warn_unused_result))
823
int raise_privileges(void){
824
int old_errno = errno;
825
int ret = 0;
826
if(seteuid(0) == -1){
827
ret = errno;
828
}
829
errno = old_errno;
830
return ret;
831
}
832
833
/* Set effective and real user ID to 0. Return errno. */
834
__attribute__((warn_unused_result))
835
int raise_privileges_permanently(void){
836
int old_errno = errno;
837
int ret = raise_privileges();
838
if(ret != 0){
839
errno = old_errno;
840
return ret;
841
}
842
if(setuid(0) == -1){
843
ret = errno;
844
}
845
errno = old_errno;
846
return ret;
847
}
848
849
/* Set effective user ID to unprivileged saved user ID */
850
__attribute__((warn_unused_result))
851
int lower_privileges(void){
852
int old_errno = errno;
853
int ret = 0;
854
if(seteuid(uid) == -1){
855
ret = errno;
856
}
857
errno = old_errno;
858
return ret;
859
}
860
861
/* Lower privileges permanently */
862
__attribute__((warn_unused_result))
863
int lower_privileges_permanently(void){
864
int old_errno = errno;
865
int ret = 0;
866
if(setuid(uid) == -1){
867
ret = errno;
868
}
869
errno = old_errno;
870
return ret;
871
}
872
873
/* Helper function to add_local_route() and delete_local_route() */
874
__attribute__((nonnull, warn_unused_result))
875
static bool add_delete_local_route(const bool add,
876
const char *address,
877
AvahiIfIndex if_index){
878
int ret;
879
char helper[] = "mandos-client-iprouteadddel";
880
char add_arg[] = "add";
881
char delete_arg[] = "delete";
882
char debug_flag[] = "--debug";
883
char *pluginhelperdir = getenv("MANDOSPLUGINHELPERDIR");
884
if(pluginhelperdir == NULL){
885
if(debug){
886
fprintf_plus(stderr, "MANDOSPLUGINHELPERDIR environment"
887
" variable not set; cannot run helper\n");
888
}
889
return false;
890
}
891
892
char interface[IF_NAMESIZE];
893
if(if_indextoname((unsigned int)if_index, interface) == NULL){
894
perror_plus("if_indextoname");
895
return false;
896
}
897
898
int devnull = (int)TEMP_FAILURE_RETRY(open("/dev/null", O_RDONLY));
899
if(devnull == -1){
900
perror_plus("open(\"/dev/null\", O_RDONLY)");
901
return false;
902
}
903
pid_t pid = fork();
904
if(pid == 0){
905
/* Child */
906
/* Raise privileges */
907
errno = raise_privileges_permanently();
908
if(errno != 0){
909
perror_plus("Failed to raise privileges");
910
/* _exit(EX_NOPERM); */
911
} else {
912
/* Set group */
913
errno = 0;
914
ret = setgid(0);
915
if(ret == -1){
916
perror_plus("setgid");
917
_exit(EX_NOPERM);
918
}
919
/* Reset supplementary groups */
920
errno = 0;
921
ret = setgroups(0, NULL);
922
if(ret == -1){
923
perror_plus("setgroups");
924
_exit(EX_NOPERM);
925
}
926
}
927
ret = dup2(devnull, STDIN_FILENO);
928
if(ret == -1){
929
perror_plus("dup2(devnull, STDIN_FILENO)");
930
_exit(EX_OSERR);
931
}
932
ret = close(devnull);
933
if(ret == -1){
934
perror_plus("close");
935
_exit(EX_OSERR);
936
}
937
ret = dup2(STDERR_FILENO, STDOUT_FILENO);
938
if(ret == -1){
939
perror_plus("dup2(STDERR_FILENO, STDOUT_FILENO)");
940
_exit(EX_OSERR);
941
}
942
int helperdir_fd = (int)TEMP_FAILURE_RETRY(open(pluginhelperdir,
943
O_RDONLY
944
| O_DIRECTORY
945
| O_PATH
946
| O_CLOEXEC));
947
if(helperdir_fd == -1){
948
perror_plus("open");
949
_exit(EX_UNAVAILABLE);
950
}
951
int helper_fd = (int)TEMP_FAILURE_RETRY(openat(helperdir_fd,
952
helper, O_RDONLY));
953
if(helper_fd == -1){
954
perror_plus("openat");
955
close(helperdir_fd);
956
_exit(EX_UNAVAILABLE);
957
}
958
close(helperdir_fd);
959
#ifdef __GNUC__
960
#pragma GCC diagnostic push
961
#pragma GCC diagnostic ignored "-Wcast-qual"
962
#endif
963
if(fexecve(helper_fd, (char *const [])
964
{ helper, add ? add_arg : delete_arg, (char *)address,
965
interface, debug ? debug_flag : NULL, NULL },
966
environ) == -1){
967
#ifdef __GNUC__
968
#pragma GCC diagnostic pop
969
#endif
970
perror_plus("fexecve");
971
_exit(EXIT_FAILURE);
972
}
973
}
974
if(pid == -1){
975
perror_plus("fork");
976
return false;
977
}
978
int status;
979
pid_t pret = -1;
980
errno = 0;
981
do {
982
pret = waitpid(pid, &status, 0);
983
if(pret == -1 and errno == EINTR and quit_now){
984
int errno_raising = 0;
985
if((errno = raise_privileges()) != 0){
986
errno_raising = errno;
987
perror_plus("Failed to raise privileges in order to"
988
" kill helper program");
989
}
990
if(kill(pid, SIGTERM) == -1){
991
perror_plus("kill");
992
}
993
if((errno_raising == 0) and (errno = lower_privileges()) != 0){
994
perror_plus("Failed to lower privileges after killing"
995
" helper program");
996
}
997
return false;
998
}
999
} while(pret == -1 and errno == EINTR);
1000
if(pret == -1){
1001
perror_plus("waitpid");
1002
return false;
1003
}
1004
if(WIFEXITED(status)){
1005
if(WEXITSTATUS(status) != 0){
1006
fprintf_plus(stderr, "Error: iprouteadddel exited"
1007
" with status %d\n", WEXITSTATUS(status));
1008
return false;
1009
}
1010
return true;
1011
}
1012
if(WIFSIGNALED(status)){
1013
fprintf_plus(stderr, "Error: iprouteadddel died by"
1014
" signal %d\n", WTERMSIG(status));
1015
return false;
1016
}
1017
fprintf_plus(stderr, "Error: iprouteadddel crashed\n");
1018
return false;
1019
}
1020
1021
__attribute__((nonnull, warn_unused_result))
1022
static bool add_local_route(const char *address,
1023
AvahiIfIndex if_index){
1024
if(debug){
1025
fprintf_plus(stderr, "Adding route to %s\n", address);
1026
}
1027
return add_delete_local_route(true, address, if_index);
1028
}
1029
1030
__attribute__((nonnull, warn_unused_result))
1031
static bool delete_local_route(const char *address,
1032
AvahiIfIndex if_index){
1033
if(debug){
1034
fprintf_plus(stderr, "Removing route to %s\n", address);
1035
}
1036
return add_delete_local_route(false, address, if_index);
1037
}
1038
1039
631
/* Called when a Mandos server is found */
1040
__attribute__((nonnull, warn_unused_result))
1041
632
static int start_mandos_communication(const char *ip, in_port_t port,
1042
633
AvahiIfIndex if_index,
1043
634
int af, mandos_context *mc){
1052
643
int retval = -1;
1053
644
gnutls_session_t session;
1054
645
int pf; /* Protocol family */
1055
bool route_added = false;
1056
646
1057
647
errno = 0;
1058
648
1080
670
bool match = false;
1081
671
{
1082
672
char *interface = NULL;
1083
while((interface = argz_next(mc->interfaces,
1084
mc->interfaces_size,
1085
interface))){
673
while((interface=argz_next(mc->interfaces, mc->interfaces_size,
674
interface))){
1086
675
if(if_nametoindex(interface) == (unsigned int)if_index){
1087
676
match = true;
1088
677
break;
1117
706
PRIuMAX "\n", ip, (uintmax_t)port);
1118
707
}
1119
708
1120
tcp_sd = socket(pf, SOCK_STREAM | SOCK_CLOEXEC, 0);
709
tcp_sd = socket(pf, SOCK_STREAM, 0);
1121
710
if(tcp_sd < 0){
1122
711
int e = errno;
1123
712
perror_plus("socket");
1130
719
goto mandos_end;
1131
720
}
1132
721
722
memset(&to, 0, sizeof(to));
1133
723
if(af == AF_INET6){
1134
struct sockaddr_in6 *to6 = (struct sockaddr_in6 *)&to;
1135
*to6 = (struct sockaddr_in6){ .sin6_family = (sa_family_t)af };
1136
ret = inet_pton(af, ip, &to6->sin6_addr);
724
((struct sockaddr_in6 *)&to)->sin6_family = (sa_family_t)af;
725
ret = inet_pton(af, ip, &((struct sockaddr_in6 *)&to)->sin6_addr);
1137
726
} else { /* IPv4 */
1138
struct sockaddr_in *to4 = (struct sockaddr_in *)&to;
1139
*to4 = (struct sockaddr_in){ .sin_family = (sa_family_t)af };
1140
ret = inet_pton(af, ip, &to4->sin_addr);
727
((struct sockaddr_in *)&to)->sin_family = (sa_family_t)af;
728
ret = inet_pton(af, ip, &((struct sockaddr_in *)&to)->sin_addr);
1141
729
}
1142
730
if(ret < 0 ){
1143
731
int e = errno;
1152
740
goto mandos_end;
1153
741
}
1154
742
if(af == AF_INET6){
1155
((struct sockaddr_in6 *)&to)->sin6_port = htons(port);
743
((struct sockaddr_in6 *)&to)->sin6_port = htons(port);
1156
744
if(IN6_IS_ADDR_LINKLOCAL
1157
745
(&((struct sockaddr_in6 *)&to)->sin6_addr)){
1158
746
if(if_index == AVAHI_IF_UNSPEC){
1213
801
goto mandos_end;
1214
802
}
1215
803
1216
while(true){
1217
if(af == AF_INET6){
1218
ret = connect(tcp_sd, (struct sockaddr *)&to,
1219
sizeof(struct sockaddr_in6));
1220
} else {
1221
ret = connect(tcp_sd, (struct sockaddr *)&to, /* IPv4 */
1222
sizeof(struct sockaddr_in));
1223
}
1224
if(ret < 0){
1225
if(((errno == ENETUNREACH) or (errno == EHOSTUNREACH))
1226
and if_index != AVAHI_IF_UNSPEC
1227
and connect_to == NULL
1228
and not route_added and
1229
((af == AF_INET6 and not
1230
IN6_IS_ADDR_LINKLOCAL(&(((struct sockaddr_in6 *)
1231
&to)->sin6_addr)))
1232
or (af == AF_INET and
1233
/* Not a a IPv4LL address */
1234
(ntohl(((struct sockaddr_in *)&to)->sin_addr.s_addr)
1235
& 0xFFFF0000L) != 0xA9FE0000L))){
1236
/* Work around Avahi bug - Avahi does not announce link-local
1237
addresses if it has a global address, so local hosts with
1238
*only* a link-local address (e.g. Mandos clients) cannot
1239
connect to a Mandos server announced by Avahi on a server
1240
host with a global address. Work around this by retrying
1241
with an explicit route added with the server's address.
1242
1243
Avahi bug reference:
1244
https://lists.freedesktop.org/archives/avahi/2010-February/001833.html
1245
https://bugs.debian.org/587961
1246
*/
1247
if(debug){
1248
fprintf_plus(stderr, "Mandos server unreachable, trying"
1249
" direct route\n");
1250
}
1251
int e = errno;
1252
route_added = add_local_route(ip, if_index);
1253
if(route_added){
1254
continue;
1255
}
1256
errno = e;
1257
}
1258
if(errno != ECONNREFUSED or debug){
1259
int e = errno;
1260
perror_plus("connect");
1261
errno = e;
1262
}
1263
goto mandos_end;
1264
}
1265
1266
if(quit_now){
1267
errno = EINTR;
1268
goto mandos_end;
1269
}
1270
break;
804
if(af == AF_INET6){
805
ret = connect(tcp_sd, (struct sockaddr *)&to,
806
sizeof(struct sockaddr_in6));
807
} else {
808
ret = connect(tcp_sd, (struct sockaddr *)&to, /* IPv4 */
809
sizeof(struct sockaddr_in));
810
}
811
if(ret < 0){
812
if ((errno != ECONNREFUSED and errno != ENETUNREACH) or debug){
813
int e = errno;
814
perror_plus("connect");
815
errno = e;
816
}
817
goto mandos_end;
818
}
819
820
if(quit_now){
821
errno = EINTR;
822
goto mandos_end;
1271
823
}
1272
824
1273
825
const char *out = mandos_protocol_version;
1427
979
&decrypted_buffer, mc);
1428
980
if(decrypted_buffer_size >= 0){
1429
981
1430
clearerr(stdout);
1431
982
written = 0;
1432
983
while(written < (size_t) decrypted_buffer_size){
1433
984
if(quit_now){
1449
1000
}
1450
1001
written += (size_t)ret;
1451
1002
}
1452
ret = fflush(stdout);
1453
if(ret != 0){
1454
int e = errno;
1455
if(debug){
1456
fprintf_plus(stderr, "Error writing encrypted data: %s\n",
1457
strerror(errno));
1458
}
1459
errno = e;
1460
goto mandos_end;
1461
}
1462
1003
retval = 0;
1463
1004
}
1464
1005
}
1467
1008
1468
1009
mandos_end:
1469
1010
{
1470
if(route_added){
1471
if(not delete_local_route(ip, if_index)){
1472
fprintf_plus(stderr, "Failed to delete local route to %s on"
1473
" interface %d", ip, if_index);
1474
}
1475
}
1476
1011
int e = errno;
1477
1012
free(decrypted_buffer);
1478
1013
free(buffer);
1479
1014
if(tcp_sd >= 0){
1480
ret = close(tcp_sd);
1015
ret = (int)TEMP_FAILURE_RETRY(close(tcp_sd));
1481
1016
}
1482
1017
if(ret == -1){
1483
1018
if(e == 0){
1508
1043
AVAHI_GCC_UNUSED AvahiStringList *txt,
1509
1044
AVAHI_GCC_UNUSED AvahiLookupResultFlags
1510
1045
flags,
1511
void *mc){
1046
void* mc){
1512
1047
if(r == NULL){
1513
1048
return;
1514
1049
}
1517
1052
timed out */
1518
1053
1519
1054
if(quit_now){
1520
avahi_s_service_resolver_free(r);
1521
1055
return;
1522
1056
}
1523
1057
1568
1102
const char *domain,
1569
1103
AVAHI_GCC_UNUSED AvahiLookupResultFlags
1570
1104
flags,
1571
void *mc){
1105
void* mc){
1572
1106
if(b == NULL){
1573
1107
return;
1574
1108
}
1634
1168
errno = old_errno;
1635
1169
}
1636
1170
1637
__attribute__((nonnull, warn_unused_result))
1638
1171
bool get_flags(const char *ifname, struct ifreq *ifr){
1639
1172
int ret;
1640
int old_errno;
1173
error_t ret_errno;
1641
1174
1642
1175
int s = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1643
1176
if(s < 0){
1644
old_errno = errno;
1177
ret_errno = errno;
1645
1178
perror_plus("socket");
1646
errno = old_errno;
1179
errno = ret_errno;
1647
1180
return false;
1648
1181
}
1649
strncpy(ifr->ifr_name, ifname, IF_NAMESIZE);
1650
ifr->ifr_name[IF_NAMESIZE-1] = '\0'; /* NUL terminate */
1182
strcpy(ifr->ifr_name, ifname);
1651
1183
ret = ioctl(s, SIOCGIFFLAGS, ifr);
1652
1184
if(ret == -1){
1653
1185
if(debug){
1654
old_errno = errno;
1186
ret_errno = errno;
1655
1187
perror_plus("ioctl SIOCGIFFLAGS");
1656
errno = old_errno;
1188
errno = ret_errno;
1657
1189
}
1658
1190
return false;
1659
1191
}
1660
1192
return true;
1661
1193
}
1662
1194
1663
__attribute__((nonnull, warn_unused_result))
1664
1195
bool good_flags(const char *ifname, const struct ifreq *ifr){
1665
1196
1666
1197
/* Reject the loopback device */
1708
1239
* corresponds to an acceptable network device.
1709
1240
* (This function is passed to scandir(3) as a filter function.)
1710
1241
*/
1711
__attribute__((nonnull, warn_unused_result))
1712
1242
int good_interface(const struct dirent *if_entry){
1713
1243
if(if_entry->d_name[0] == '.'){
1714
1244
return 0;
1732
1262
/*
1733
1263
* This function determines if a network interface is up.
1734
1264
*/
1735
__attribute__((nonnull, warn_unused_result))
1736
1265
bool interface_is_up(const char *interface){
1737
1266
struct ifreq ifr;
1738
1267
if(not get_flags(interface, &ifr)){
1749
1278
/*
1750
1279
* This function determines if a network interface is running
1751
1280
*/
1752
__attribute__((nonnull, warn_unused_result))
1753
1281
bool interface_is_running(const char *interface){
1754
1282
struct ifreq ifr;
1755
1283
if(not get_flags(interface, &ifr)){
1763
1291
return (bool)(ifr.ifr_flags & IFF_RUNNING);
1764
1292
}
1765
1293
1766
__attribute__((nonnull, pure, warn_unused_result))
1767
1294
int notdotentries(const struct dirent *direntry){
1768
1295
/* Skip "." and ".." */
1769
1296
if(direntry->d_name[0] == '.'
1776
1303
}
1777
1304
1778
1305
/* Is this directory entry a runnable program? */
1779
__attribute__((nonnull, warn_unused_result))
1780
1306
int runnable_hook(const struct dirent *direntry){
1781
1307
int ret;
1782
1308
size_t sret;
1790
1316
sret = strspn(direntry->d_name, "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
1791
1317
"abcdefghijklmnopqrstuvwxyz"
1792
1318
"0123456789"
1793
"_.-");
1319
"_-");
1794
1320
if((direntry->d_name)[sret] != '\0'){
1795
1321
/* Contains non-allowed characters */
1796
1322
if(debug){
1800
1326
return 0;
1801
1327
}
1802
1328
1803
ret = fstatat(hookdir_fd, direntry->d_name, &st, 0);
1329
char *fullname = NULL;
1330
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1331
if(ret < 0){
1332
perror_plus("asprintf");
1333
return 0;
1334
}
1335
1336
ret = stat(fullname, &st);
1804
1337
if(ret == -1){
1805
1338
if(debug){
1806
1339
perror_plus("Could not stat hook");
1830
1363
return 1;
1831
1364
}
1832
1365
1833
__attribute__((nonnull, warn_unused_result))
1834
1366
int avahi_loop_with_timeout(AvahiSimplePoll *s, int retry_interval,
1835
1367
mandos_context *mc){
1836
1368
int ret;
1840
1372
1841
1373
while(true){
1842
1374
if(mc->current_server == NULL){
1843
if(debug){
1375
if (debug){
1844
1376
fprintf_plus(stderr, "Wait until first server is found."
1845
1377
" No timeout!\n");
1846
1378
}
1847
1379
ret = avahi_simple_poll_iterate(s, -1);
1848
1380
} else {
1849
if(debug){
1381
if (debug){
1850
1382
fprintf_plus(stderr, "Check current_server if we should run"
1851
1383
" it, or wait\n");
1852
1384
}
1869
1401
- ((intmax_t)waited_time.tv_sec * 1000))
1870
1402
- ((intmax_t)waited_time.tv_nsec / 1000000));
1871
1403
1872
if(debug){
1404
if (debug){
1873
1405
fprintf_plus(stderr, "Blocking for %" PRIdMAX " ms\n",
1874
1406
block_time);
1875
1407
}
1897
1429
ret = avahi_simple_poll_iterate(s, (int)block_time);
1898
1430
}
1899
1431
if(ret != 0){
1900
if(ret > 0 or errno != EINTR){
1432
if (ret > 0 or errno != EINTR){
1901
1433
return (ret != 1) ? ret : 0;
1902
1434
}
1903
1435
}
1904
1436
}
1905
1437
}
1906
1438
1907
__attribute__((nonnull))
1908
void run_network_hooks(const char *mode, const char *interface,
1439
/* Set effective uid to 0, return errno */
1440
error_t raise_privileges(void){
1441
error_t old_errno = errno;
1442
error_t ret_errno = 0;
1443
if(seteuid(0) == -1){
1444
ret_errno = errno;
1445
perror_plus("seteuid");
1446
}
1447
errno = old_errno;
1448
return ret_errno;
1449
}
1450
1451
/* Set effective and real user ID to 0. Return errno. */
1452
error_t raise_privileges_permanently(void){
1453
error_t old_errno = errno;
1454
error_t ret_errno = raise_privileges();
1455
if(ret_errno != 0){
1456
errno = old_errno;
1457
return ret_errno;
1458
}
1459
if(setuid(0) == -1){
1460
ret_errno = errno;
1461
perror_plus("seteuid");
1462
}
1463
errno = old_errno;
1464
return ret_errno;
1465
}
1466
1467
/* Set effective user ID to unprivileged saved user ID */
1468
error_t lower_privileges(void){
1469
error_t old_errno = errno;
1470
error_t ret_errno = 0;
1471
if(seteuid(uid) == -1){
1472
ret_errno = errno;
1473
perror_plus("seteuid");
1474
}
1475
errno = old_errno;
1476
return ret_errno;
1477
}
1478
1479
/* Lower privileges permanently */
1480
error_t lower_privileges_permanently(void){
1481
error_t old_errno = errno;
1482
error_t ret_errno = 0;
1483
if(setuid(uid) == -1){
1484
ret_errno = errno;
1485
perror_plus("setuid");
1486
}
1487
errno = old_errno;
1488
return ret_errno;
1489
}
1490
1491
bool run_network_hooks(const char *mode, const char *interface,
1909
1492
const float delay){
1910
struct dirent **direntries = NULL;
1911
if(hookdir_fd == -1){
1912
hookdir_fd = open(hookdir, O_RDONLY | O_DIRECTORY | O_PATH
1913
| O_CLOEXEC);
1914
if(hookdir_fd == -1){
1915
if(errno == ENOENT){
1916
if(debug){
1917
fprintf_plus(stderr, "Network hook directory \"%s\" not"
1918
" found\n", hookdir);
1919
}
1920
} else {
1921
perror_plus("open");
1922
}
1923
return;
1924
}
1925
}
1926
int devnull = (int)TEMP_FAILURE_RETRY(open("/dev/null", O_RDONLY));
1927
if(devnull == -1){
1928
perror_plus("open(\"/dev/null\", O_RDONLY)");
1929
return;
1930
}
1931
int numhooks = scandirat(hookdir_fd, ".", &direntries,
1932
runnable_hook, alphasort);
1493
struct dirent **direntries;
1494
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1495
alphasort);
1933
1496
if(numhooks == -1){
1934
perror_plus("scandir");
1935
close(devnull);
1936
return;
1937
}
1938
struct dirent *direntry;
1939
int ret;
1940
for(int i = 0; i < numhooks; i++){
1941
direntry = direntries[i];
1942
if(debug){
1943
fprintf_plus(stderr, "Running network hook \"%s\"\n",
1944
direntry->d_name);
1497
if(errno == ENOENT){
1498
if(debug){
1499
fprintf_plus(stderr, "Network hook directory \"%s\" not"
1500
" found\n", hookdir);
1501
}
1502
} else {
1503
perror_plus("scandir");
1945
1504
}
1946
pid_t hook_pid = fork();
1947
if(hook_pid == 0){
1948
/* Child */
1949
/* Raise privileges */
1950
errno = raise_privileges_permanently();
1951
if(errno != 0){
1952
perror_plus("Failed to raise privileges");
1953
_exit(EX_NOPERM);
1954
}
1955
/* Set group */
1956
errno = 0;
1957
ret = setgid(0);
1958
if(ret == -1){
1959
perror_plus("setgid");
1960
_exit(EX_NOPERM);
1961
}
1962
/* Reset supplementary groups */
1963
errno = 0;
1964
ret = setgroups(0, NULL);
1965
if(ret == -1){
1966
perror_plus("setgroups");
1967
_exit(EX_NOPERM);
1968
}
1969
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1970
if(ret == -1){
1971
perror_plus("setenv");
1972
_exit(EX_OSERR);
1973
}
1974
ret = setenv("DEVICE", interface, 1);
1975
if(ret == -1){
1976
perror_plus("setenv");
1977
_exit(EX_OSERR);
1978
}
1979
ret = setenv("VERBOSITY", debug ? "1" : "0", 1);
1980
if(ret == -1){
1981
perror_plus("setenv");
1982
_exit(EX_OSERR);
1983
}
1984
ret = setenv("MODE", mode, 1);
1985
if(ret == -1){
1986
perror_plus("setenv");
1987
_exit(EX_OSERR);
1988
}
1989
char *delaystring;
1990
ret = asprintf(&delaystring, "%f", (double)delay);
1991
if(ret == -1){
1505
} else {
1506
struct dirent *direntry;
1507
int ret;
1508
int devnull = open("/dev/null", O_RDONLY);
1509
for(int i = 0; i < numhooks; i++){
1510
direntry = direntries[i];
1511
char *fullname = NULL;
1512
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1513
if(ret < 0){
1992
1514
perror_plus("asprintf");
1993
_exit(EX_OSERR);
1994
}
1995
ret = setenv("DELAY", delaystring, 1);
1996
if(ret == -1){
1515
continue;
1516
}
1517
if(debug){
1518
fprintf_plus(stderr, "Running network hook \"%s\"\n",
1519
direntry->d_name);
1520
}
1521
pid_t hook_pid = fork();
1522
if(hook_pid == 0){
1523
/* Child */
1524
/* Raise privileges */
1525
raise_privileges_permanently();
1526
/* Set group */
1527
errno = 0;
1528
ret = setgid(0);
1529
if(ret == -1){
1530
perror_plus("setgid");
1531
}
1532
/* Reset supplementary groups */
1533
errno = 0;
1534
ret = setgroups(0, NULL);
1535
if(ret == -1){
1536
perror_plus("setgroups");
1537
}
1538
dup2(devnull, STDIN_FILENO);
1539
close(devnull);
1540
dup2(STDERR_FILENO, STDOUT_FILENO);
1541
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1542
if(ret == -1){
1543
perror_plus("setenv");
1544
_exit(EX_OSERR);
1545
}
1546
ret = setenv("DEVICE", interface, 1);
1547
if(ret == -1){
1548
perror_plus("setenv");
1549
_exit(EX_OSERR);
1550
}
1551
ret = setenv("VERBOSITY", debug ? "1" : "0", 1);
1552
if(ret == -1){
1553
perror_plus("setenv");
1554
_exit(EX_OSERR);
1555
}
1556
ret = setenv("MODE", mode, 1);
1557
if(ret == -1){
1558
perror_plus("setenv");
1559
_exit(EX_OSERR);
1560
}
1561
char *delaystring;
1562
ret = asprintf(&delaystring, "%f", delay);
1563
if(ret == -1){
1564
perror_plus("asprintf");
1565
_exit(EX_OSERR);
1566
}
1567
ret = setenv("DELAY", delaystring, 1);
1568
if(ret == -1){
1569
free(delaystring);
1570
perror_plus("setenv");
1571
_exit(EX_OSERR);
1572
}
1997
1573
free(delaystring);
1998
perror_plus("setenv");
1999
_exit(EX_OSERR);
2000
}
2001
free(delaystring);
2002
if(connect_to != NULL){
2003
ret = setenv("CONNECT", connect_to, 1);
2004
if(ret == -1){
2005
perror_plus("setenv");
2006
_exit(EX_OSERR);
2007
}
2008
}
2009
int hook_fd = (int)TEMP_FAILURE_RETRY(openat(hookdir_fd,
2010
direntry->d_name,
2011
O_RDONLY));
2012
if(hook_fd == -1){
2013
perror_plus("openat");
2014
_exit(EXIT_FAILURE);
2015
}
2016
if(close(hookdir_fd) == -1){
2017
perror_plus("close");
2018
_exit(EXIT_FAILURE);
2019
}
2020
ret = dup2(devnull, STDIN_FILENO);
2021
if(ret == -1){
2022
perror_plus("dup2(devnull, STDIN_FILENO)");
2023
_exit(EX_OSERR);
2024
}
2025
ret = close(devnull);
2026
if(ret == -1){
2027
perror_plus("close");
2028
_exit(EX_OSERR);
2029
}
2030
ret = dup2(STDERR_FILENO, STDOUT_FILENO);
2031
if(ret == -1){
2032
perror_plus("dup2(STDERR_FILENO, STDOUT_FILENO)");
2033
_exit(EX_OSERR);
2034
}
2035
if(fexecve(hook_fd, (char *const []){ direntry->d_name, NULL },
2036
environ) == -1){
2037
perror_plus("fexecve");
2038
_exit(EXIT_FAILURE);
2039
}
2040
} else {
2041
if(hook_pid == -1){
2042
perror_plus("fork");
2043
free(direntry);
2044
continue;
2045
}
2046
int status;
2047
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
2048
perror_plus("waitpid");
2049
free(direntry);
2050
continue;
2051
}
2052
if(WIFEXITED(status)){
2053
if(WEXITSTATUS(status) != 0){
2054
fprintf_plus(stderr, "Warning: network hook \"%s\" exited"
2055
" with status %d\n", direntry->d_name,
2056
WEXITSTATUS(status));
2057
free(direntry);
2058
continue;
2059
}
2060
} else if(WIFSIGNALED(status)){
2061
fprintf_plus(stderr, "Warning: network hook \"%s\" died by"
2062
" signal %d\n", direntry->d_name,
2063
WTERMSIG(status));
2064
free(direntry);
2065
continue;
1574
if(connect_to != NULL){
1575
ret = setenv("CONNECT", connect_to, 1);
1576
if(ret == -1){
1577
perror_plus("setenv");
1578
_exit(EX_OSERR);
1579
}
1580
}
1581
if(execl(fullname, direntry->d_name, mode, NULL) == -1){
1582
perror_plus("execl");
1583
_exit(EXIT_FAILURE);
1584
}
2066
1585
} else {
2067
fprintf_plus(stderr, "Warning: network hook \"%s\""
2068
" crashed\n", direntry->d_name);
2069
free(direntry);
2070
continue;
2071
}
2072
}
2073
if(debug){
2074
fprintf_plus(stderr, "Network hook \"%s\" ran successfully\n",
2075
direntry->d_name);
2076
}
2077
free(direntry);
2078
}
2079
free(direntries);
2080
if(close(hookdir_fd) == -1){
2081
perror_plus("close");
2082
} else {
2083
hookdir_fd = -1;
2084
}
2085
close(devnull);
1586
int status;
1587
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
1588
perror_plus("waitpid");
1589
free(fullname);
1590
continue;
1591
}
1592
if(WIFEXITED(status)){
1593
if(WEXITSTATUS(status) != 0){
1594
fprintf_plus(stderr, "Warning: network hook \"%s\" exited"
1595
" with status %d\n", direntry->d_name,
1596
WEXITSTATUS(status));
1597
free(fullname);
1598
continue;
1599
}
1600
} else if(WIFSIGNALED(status)){
1601
fprintf_plus(stderr, "Warning: network hook \"%s\" died by"
1602
" signal %d\n", direntry->d_name,
1603
WTERMSIG(status));
1604
free(fullname);
1605
continue;
1606
} else {
1607
fprintf_plus(stderr, "Warning: network hook \"%s\""
1608
" crashed\n", direntry->d_name);
1609
free(fullname);
1610
continue;
1611
}
1612
}
1613
free(fullname);
1614
if(debug){
1615
fprintf_plus(stderr, "Network hook \"%s\" ran successfully\n",
1616
direntry->d_name);
1617
}
1618
}
1619
close(devnull);
1620
}
1621
return true;
2086
1622
}
2087
1623
2088
__attribute__((nonnull, warn_unused_result))
2089
int bring_up_interface(const char *const interface,
2090
const float delay){
2091
int old_errno = errno;
2092
int ret;
1624
error_t bring_up_interface(const char *const interface,
1625
const float delay){
1626
int sd = -1;
1627
error_t old_errno = errno;
1628
error_t ret_errno = 0;
1629
int ret, ret_setflags;
2093
1630
struct ifreq network;
2094
1631
unsigned int if_index = if_nametoindex(interface);
2095
1632
if(if_index == 0){
2104
1641
}
2105
1642
2106
1643
if(not interface_is_up(interface)){
2107
int ret_errno = 0;
2108
int ioctl_errno = 0;
2109
if(not get_flags(interface, &network)){
1644
if(not get_flags(interface, &network) and debug){
2110
1645
ret_errno = errno;
2111
1646
fprintf_plus(stderr, "Failed to get flags for interface "
2112
1647
"\"%s\"\n", interface);
2113
errno = old_errno;
2114
1648
return ret_errno;
2115
1649
}
2116
network.ifr_flags |= IFF_UP; /* set flag */
1650
network.ifr_flags |= IFF_UP;
2117
1651
2118
int sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
2119
if(sd == -1){
1652
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1653
if(sd < 0){
2120
1654
ret_errno = errno;
2121
1655
perror_plus("socket");
2122
1656
errno = old_errno;
2123
1657
return ret_errno;
2124
1658
}
2125
1659
2126
1660
if(quit_now){
2127
ret = close(sd);
2128
if(ret == -1){
2129
perror_plus("close");
2130
}
1661
close(sd);
2131
1662
errno = old_errno;
2132
1663
return EINTR;
2133
1664
}
2137
1668
interface);
2138
1669
}
2139
1670
2140
/* Raise privileges */
2141
ret_errno = raise_privileges();
2142
if(ret_errno != 0){
2143
errno = ret_errno;
2144
perror_plus("Failed to raise privileges");
2145
}
1671
/* Raise priviliges */
1672
raise_privileges();
2146
1673
2147
1674
#ifdef __linux__
2148
int ret_linux;
2149
bool restore_loglevel = false;
2150
if(ret_errno == 0){
2151
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
2152
messages about the network interface to mess up the prompt */
2153
ret_linux = klogctl(8, NULL, 5);
2154
if(ret_linux == -1){
2155
perror_plus("klogctl");
2156
} else {
2157
restore_loglevel = true;
2158
}
1675
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1676
messages about the network interface to mess up the prompt */
1677
int ret_linux = klogctl(8, NULL, 5);
1678
bool restore_loglevel = true;
1679
if(ret_linux == -1){
1680
restore_loglevel = false;
1681
perror_plus("klogctl");
2159
1682
}
2160
1683
#endif /* __linux__ */
2161
int ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
2162
ioctl_errno = errno;
1684
ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1685
ret_errno = errno;
2163
1686
#ifdef __linux__
2164
1687
if(restore_loglevel){
2165
1688
ret_linux = klogctl(7, NULL, 0);
2169
1692
}
2170
1693
#endif /* __linux__ */
2171
1694
2172
/* If raise_privileges() succeeded above */
2173
if(ret_errno == 0){
2174
/* Lower privileges */
2175
ret_errno = lower_privileges();
2176
if(ret_errno != 0){
2177
errno = ret_errno;
2178
perror_plus("Failed to lower privileges");
2179
}
2180
}
1695
/* Lower privileges */
1696
lower_privileges();
2181
1697
2182
1698
/* Close the socket */
2183
ret = close(sd);
1699
ret = (int)TEMP_FAILURE_RETRY(close(sd));
2184
1700
if(ret == -1){
2185
1701
perror_plus("close");
2186
1702
}
2187
1703
2188
1704
if(ret_setflags == -1){
2189
errno = ioctl_errno;
1705
errno = ret_errno;
2190
1706
perror_plus("ioctl SIOCSIFFLAGS +IFF_UP");
2191
1707
errno = old_errno;
2192
return ioctl_errno;
1708
return ret_errno;
2193
1709
}
2194
1710
} else if(debug){
2195
1711
fprintf_plus(stderr, "Interface \"%s\" is already up; good\n",
2198
1714
2199
1715
/* Sleep checking until interface is running.
2200
1716
Check every 0.25s, up to total time of delay */
2201
for(int i = 0; i < delay * 4; i++){
1717
for(int i=0; i < delay * 4; i++){
2202
1718
if(interface_is_running(interface)){
2203
1719
break;
2204
1720
}
2213
1729
return 0;
2214
1730
}
2215
1731
2216
__attribute__((nonnull, warn_unused_result))
2217
int take_down_interface(const char *const interface){
2218
int old_errno = errno;
1732
error_t take_down_interface(const char *const interface){
1733
error_t old_errno = errno;
2219
1734
struct ifreq network;
2220
1735
unsigned int if_index = if_nametoindex(interface);
2221
1736
if(if_index == 0){
2224
1739
return ENXIO;
2225
1740
}
2226
1741
if(interface_is_up(interface)){
2227
int ret_errno = 0;
2228
int ioctl_errno = 0;
1742
error_t ret_errno = 0;
2229
1743
if(not get_flags(interface, &network) and debug){
2230
1744
ret_errno = errno;
2231
1745
fprintf_plus(stderr, "Failed to get flags for interface "
2232
1746
"\"%s\"\n", interface);
2233
errno = old_errno;
2234
1747
return ret_errno;
2235
1748
}
2236
1749
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
2237
1750
2238
1751
int sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
2239
if(sd == -1){
1752
if(sd < 0){
2240
1753
ret_errno = errno;
2241
1754
perror_plus("socket");
2242
1755
errno = old_errno;
2248
1761
interface);
2249
1762
}
2250
1763
2251
/* Raise privileges */
2252
ret_errno = raise_privileges();
2253
if(ret_errno != 0){
2254
errno = ret_errno;
2255
perror_plus("Failed to raise privileges");
2256
}
1764
/* Raise priviliges */
1765
raise_privileges();
2257
1766
2258
1767
int ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
2259
ioctl_errno = errno;
1768
ret_errno = errno;
2260
1769
2261
/* If raise_privileges() succeeded above */
2262
if(ret_errno == 0){
2263
/* Lower privileges */
2264
ret_errno = lower_privileges();
2265
if(ret_errno != 0){
2266
errno = ret_errno;
2267
perror_plus("Failed to lower privileges");
2268
}
2269
}
1770
/* Lower privileges */
1771
lower_privileges();
2270
1772
2271
1773
/* Close the socket */
2272
int ret = close(sd);
1774
int ret = (int)TEMP_FAILURE_RETRY(close(sd));
2273
1775
if(ret == -1){
2274
1776
perror_plus("close");
2275
1777
}
2276
1778
2277
1779
if(ret_setflags == -1){
2278
errno = ioctl_errno;
1780
errno = ret_errno;
2279
1781
perror_plus("ioctl SIOCSIFFLAGS -IFF_UP");
2280
1782
errno = old_errno;
2281
return ioctl_errno;
1783
return ret_errno;
2282
1784
}
2283
1785
} else if(debug){
2284
1786
fprintf_plus(stderr, "Interface \"%s\" is already down; odd\n",
2290
1792
}
2291
1793
2292
1794
int main(int argc, char *argv[]){
2293
mandos_context mc = { .server = NULL, .dh_bits = 0,
2294
.priority = "SECURE256:!CTYPE-X.509"
2295
":+CTYPE-OPENPGP:!RSA:+SIGN-DSA-SHA256",
2296
.current_server = NULL, .interfaces = NULL,
2297
.interfaces_size = 0 };
1795
mandos_context mc = { .server = NULL, .dh_bits = 1024,
1796
.priority = "SECURE256:!CTYPE-X.509:"
1797
"+CTYPE-OPENPGP", .current_server = NULL,
1798
.interfaces = NULL, .interfaces_size = 0 };
2298
1799
AvahiSServiceBrowser *sb = NULL;
2299
1800
error_t ret_errno;
2300
1801
int ret;
2303
1804
int exitcode = EXIT_SUCCESS;
2304
1805
char *interfaces_to_take_down = NULL;
2305
1806
size_t interfaces_to_take_down_size = 0;
2306
char run_tempdir[] = "/run/tmp/mandosXXXXXX";
2307
char old_tempdir[] = "/tmp/mandosXXXXXX";
2308
char *tempdir = NULL;
1807
char tempdir[] = "/tmp/mandosXXXXXX";
1808
bool tempdir_created = false;
2309
1809
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
2310
1810
const char *seckey = PATHDIR "/" SECKEY;
2311
1811
const char *pubkey = PATHDIR "/" PUBKEY;
2312
const char *dh_params_file = NULL;
2313
1812
char *interfaces_hooks = NULL;
2314
1813
2315
1814
bool gnutls_initialized = false;
2368
1867
.doc = "Bit length of the prime number used in the"
2369
1868
" Diffie-Hellman key exchange",
2370
1869
.group = 2 },
2371
{ .name = "dh-params", .key = 134,
2372
.arg = "FILE",
2373
.doc = "PEM-encoded PKCS#3 file with pre-generated parameters"
2374
" for the Diffie-Hellman key exchange",
2375
.group = 2 },
2376
1870
{ .name = "priority", .key = 130,
2377
1871
.arg = "STRING",
2378
1872
.doc = "GnuTLS priority string for the TLS handshake",
2433
1927
}
2434
1928
mc.dh_bits = (typeof(mc.dh_bits))tmpmax;
2435
1929
break;
2436
case 134: /* --dh-params */
2437
dh_params_file = arg;
2438
break;
2439
1930
case 130: /* --priority */
2440
1931
mc.priority = arg;
2441
1932
break;
2481
1972
.args_doc = "",
2482
1973
.doc = "Mandos client -- Get and decrypt"
2483
1974
" passwords from a Mandos server" };
2484
ret_errno = argp_parse(&argp, argc, argv,
2485
ARGP_IN_ORDER | ARGP_NO_HELP, 0, NULL);
2486
switch(ret_errno){
1975
ret = argp_parse(&argp, argc, argv,
1976
ARGP_IN_ORDER | ARGP_NO_HELP, 0, NULL);
1977
switch(ret){
2487
1978
case 0:
2488
1979
break;
2489
1980
case ENOMEM:
2490
1981
default:
2491
errno = ret_errno;
1982
errno = ret;
2492
1983
perror_plus("argp_parse");
2493
1984
exitcode = EX_OSERR;
2494
1985
goto end;
2497
1988
goto end;
2498
1989
}
2499
1990
}
2500
1991
2501
1992
{
2502
1993
/* Work around Debian bug #633582:
2503
<https://bugs.debian.org/633582> */
1994
<http://bugs.debian.org/633582> */
2504
1995
2505
/* Re-raise privileges */
2506
ret = raise_privileges();
2507
if(ret != 0){
2508
errno = ret;
2509
perror_plus("Failed to raise privileges");
2510
} else {
1996
/* Re-raise priviliges */
1997
if(raise_privileges() == 0){
2511
1998
struct stat st;
2512
1999
2513
2000
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
2527
2014
}
2528
2015
}
2529
2016
}
2530
close(seckey_fd);
2017
TEMP_FAILURE_RETRY(close(seckey_fd));
2531
2018
}
2532
2019
}
2533
2020
2534
2021
if(strcmp(pubkey, PATHDIR "/" PUBKEY) == 0){
2535
2022
int pubkey_fd = open(pubkey, O_RDONLY);
2536
2023
if(pubkey_fd == -1){
2548
2035
}
2549
2036
}
2550
2037
}
2551
close(pubkey_fd);
2552
}
2553
}
2554
2555
if(dh_params_file != NULL
2556
and strcmp(dh_params_file, PATHDIR "/dhparams.pem" ) == 0){
2557
int dhparams_fd = open(dh_params_file, O_RDONLY);
2558
if(dhparams_fd == -1){
2559
perror_plus("open");
2560
} else {
2561
ret = (int)TEMP_FAILURE_RETRY(fstat(dhparams_fd, &st));
2562
if(ret == -1){
2563
perror_plus("fstat");
2564
} else {
2565
if(S_ISREG(st.st_mode)
2566
and st.st_uid == 0 and st.st_gid == 0){
2567
ret = fchown(dhparams_fd, uid, gid);
2568
if(ret == -1){
2569
perror_plus("fchown");
2570
}
2571
}
2572
}
2573
close(dhparams_fd);
2574
}
2575
}
2576
2038
TEMP_FAILURE_RETRY(close(pubkey_fd));
2039
}
2040
}
2041
2577
2042
/* Lower privileges */
2578
ret = lower_privileges();
2579
if(ret != 0){
2580
errno = ret;
2581
perror_plus("Failed to lower privileges");
2582
}
2043
lower_privileges();
2583
2044
}
2584
2045
}
2585
2046
2611
2072
memcpy(interfaces_hooks, mc.interfaces, mc.interfaces_size);
2612
2073
argz_stringify(interfaces_hooks, mc.interfaces_size, (int)',');
2613
2074
}
2614
run_network_hooks("start", interfaces_hooks != NULL ?
2615
interfaces_hooks : "", delay);
2075
if(not run_network_hooks("start", interfaces_hooks != NULL ?
2076
interfaces_hooks : "", delay)){
2077
goto end;
2078
}
2616
2079
}
2617
2080
2618
2081
if(not debug){
2696
2159
2697
2160
/* If no interfaces were specified, make a list */
2698
2161
if(mc.interfaces == NULL){
2699
struct dirent **direntries = NULL;
2162
struct dirent **direntries;
2700
2163
/* Look for any good interfaces */
2701
2164
ret = scandir(sys_class_net, &direntries, good_interface,
2702
2165
alphasort);
2708
2171
if(ret_errno != 0){
2709
2172
errno = ret_errno;
2710
2173
perror_plus("argz_add");
2711
free(direntries[i]);
2712
2174
continue;
2713
2175
}
2714
2176
if(debug){
2715
2177
fprintf_plus(stderr, "Will use interface \"%s\"\n",
2716
2178
direntries[i]->d_name);
2717
2179
}
2718
free(direntries[i]);
2719
2180
}
2720
2181
free(direntries);
2721
2182
} else {
2722
if(ret == 0){
2723
free(direntries);
2724
}
2183
free(direntries);
2725
2184
fprintf_plus(stderr, "Could not find a network interface\n");
2726
2185
exitcode = EXIT_FAILURE;
2727
2186
goto end;
2750
2209
break;
2751
2210
}
2752
2211
bool interface_was_up = interface_is_up(interface);
2753
errno = bring_up_interface(interface, delay);
2212
ret = bring_up_interface(interface, delay);
2754
2213
if(not interface_was_up){
2755
if(errno != 0){
2756
fprintf_plus(stderr, "Failed to bring up interface \"%s\":"
2757
" %s\n", interface, strerror(errno));
2214
if(ret != 0){
2215
errno = ret;
2216
perror_plus("Failed to bring up interface");
2758
2217
} else {
2759
errno = argz_add(&interfaces_to_take_down,
2760
&interfaces_to_take_down_size,
2761
interface);
2762
if(errno != 0){
2218
ret_errno = argz_add(&interfaces_to_take_down,
2219
&interfaces_to_take_down_size,
2220
interface);
2221
if(ret_errno != 0){
2222
errno = ret_errno;
2763
2223
perror_plus("argz_add");
2764
2224
}
2765
2225
}
2783
2243
goto end;
2784
2244
}
2785
2245
2786
ret = init_gnutls_global(pubkey, seckey, dh_params_file, &mc);
2246
ret = init_gnutls_global(pubkey, seckey, &mc);
2787
2247
if(ret == -1){
2788
2248
fprintf_plus(stderr, "init_gnutls_global failed\n");
2789
2249
exitcode = EX_UNAVAILABLE;
2796
2256
goto end;
2797
2257
}
2798
2258
2799
/* Try /run/tmp before /tmp */
2800
tempdir = mkdtemp(run_tempdir);
2801
if(tempdir == NULL and errno == ENOENT){
2802
if(debug){
2803
fprintf_plus(stderr, "Tempdir %s did not work, trying %s\n",
2804
run_tempdir, old_tempdir);
2805
}
2806
tempdir = mkdtemp(old_tempdir);
2807
}
2808
if(tempdir == NULL){
2259
if(mkdtemp(tempdir) == NULL){
2809
2260
perror_plus("mkdtemp");
2810
2261
goto end;
2811
2262
}
2263
tempdir_created = true;
2812
2264
2813
2265
if(quit_now){
2814
2266
goto end;
2889
2341
sleep((unsigned int)retry_interval);
2890
2342
}
2891
2343
2892
if(not quit_now){
2344
if (not quit_now){
2893
2345
exitcode = EXIT_SUCCESS;
2894
2346
}
2895
2347
2911
2363
2912
2364
/* Allocate a new server */
2913
2365
mc.server = avahi_server_new(avahi_simple_poll_get(simple_poll),
2914
&config, NULL, NULL, &ret);
2366
&config, NULL, NULL, &ret_errno);
2915
2367
2916
2368
/* Free the Avahi configuration data */
2917
2369
avahi_server_config_free(&config);
2920
2372
/* Check if creating the Avahi server object succeeded */
2921
2373
if(mc.server == NULL){
2922
2374
fprintf_plus(stderr, "Failed to create Avahi server: %s\n",
2923
avahi_strerror(ret));
2375
avahi_strerror(ret_errno));
2924
2376
exitcode = EX_UNAVAILABLE;
2925
2377
goto end;
2926
2378
}
2950
2402
if(debug){
2951
2403
fprintf_plus(stderr, "Starting Avahi loop search\n");
2952
2404
}
2953
2405
2954
2406
ret = avahi_loop_with_timeout(simple_poll,
2955
2407
(int)(retry_interval * 1000), &mc);
2956
2408
if(debug){
2961
2413
end:
2962
2414
2963
2415
if(debug){
2964
if(signal_received){
2965
fprintf_plus(stderr, "%s exiting due to signal %d: %s\n",
2966
argv[0], signal_received,
2967
strsignal(signal_received));
2968
} else {
2969
fprintf_plus(stderr, "%s exiting\n", argv[0]);
2970
}
2416
fprintf_plus(stderr, "%s exiting\n", argv[0]);
2971
2417
}
2972
2418
2973
2419
/* Cleanup things */
2984
2430
2985
2431
if(gnutls_initialized){
2986
2432
gnutls_certificate_free_credentials(mc.cred);
2433
gnutls_global_deinit();
2987
2434
gnutls_dh_params_deinit(mc.dh_params);
2988
2435
}
2989
2436
2997
2444
mc.current_server->prev->next = NULL;
2998
2445
while(mc.current_server != NULL){
2999
2446
server *next = mc.current_server->next;
3000
#ifdef __GNUC__
3001
#pragma GCC diagnostic push
3002
#pragma GCC diagnostic ignored "-Wcast-qual"
3003
#endif
3004
free((char *)(mc.current_server->ip));
3005
#ifdef __GNUC__
3006
#pragma GCC diagnostic pop
3007
#endif
3008
2447
free(mc.current_server);
3009
2448
mc.current_server = next;
3010
2449
}
3011
2450
}
3012
2451
3013
/* Re-raise privileges */
2452
/* Re-raise priviliges */
3014
2453
{
3015
ret = raise_privileges();
3016
if(ret != 0){
3017
errno = ret;
3018
perror_plus("Failed to raise privileges");
3019
} else {
3020
3021
/* Run network hooks */
3022
run_network_hooks("stop", interfaces_hooks != NULL ?
3023
interfaces_hooks : "", delay);
3024
3025
/* Take down the network interfaces which were brought up */
3026
{
3027
char *interface = NULL;
3028
while((interface = argz_next(interfaces_to_take_down,
3029
interfaces_to_take_down_size,
3030
interface))){
3031
ret = take_down_interface(interface);
3032
if(ret != 0){
3033
errno = ret;
3034
perror_plus("Failed to take down interface");
3035
}
3036
}
3037
if(debug and (interfaces_to_take_down == NULL)){
3038
fprintf_plus(stderr, "No interfaces needed to be taken"
3039
" down\n");
3040
}
3041
}
3042
}
3043
3044
ret = lower_privileges_permanently();
3045
if(ret != 0){
3046
errno = ret;
3047
perror_plus("Failed to lower privileges permanently");
3048
}
2454
raise_privileges();
2455
2456
/* Run network hooks */
2457
run_network_hooks("stop", interfaces_hooks != NULL ?
2458
interfaces_hooks : "", delay);
2459
2460
/* Take down the network interfaces which were brought up */
2461
{
2462
char *interface = NULL;
2463
while((interface=argz_next(interfaces_to_take_down,
2464
interfaces_to_take_down_size,
2465
interface))){
2466
ret_errno = take_down_interface(interface);
2467
if(ret_errno != 0){
2468
errno = ret_errno;
2469
perror_plus("Failed to take down interface");
2470
}
2471
}
2472
if(debug and (interfaces_to_take_down == NULL)){
2473
fprintf_plus(stderr, "No interfaces needed to be taken"
2474
" down\n");
2475
}
2476
}
2477
2478
lower_privileges_permanently();
3049
2479
}
3050
2480
3051
2481
free(interfaces_to_take_down);
3052
2482
free(interfaces_hooks);
3053
2483
3054
void clean_dir_at(int base, const char * const dirname,
3055
uintmax_t level){
2484
/* Removes the GPGME temp directory and all files inside */
2485
if(tempdir_created){
3056
2486
struct dirent **direntries = NULL;
3057
int dret;
3058
int dir_fd = (int)TEMP_FAILURE_RETRY(openat(base, dirname,
3059
O_RDONLY
3060
| O_NOFOLLOW
3061
| O_DIRECTORY
3062
| O_PATH));
3063
if(dir_fd == -1){
3064
perror_plus("open");
3065
}
3066
int numentries = scandirat(dir_fd, ".", &direntries,
3067
notdotentries, alphasort);
3068
if(numentries >= 0){
2487
struct dirent *direntry = NULL;
2488
int numentries = scandir(tempdir, &direntries, notdotentries,
2489
alphasort);
2490
if (numentries > 0){
3069
2491
for(int i = 0; i < numentries; i++){
3070
if(debug){
3071
fprintf_plus(stderr, "Unlinking \"%s/%s\"\n",
3072
dirname, direntries[i]->d_name);
3073
}
3074
dret = unlinkat(dir_fd, direntries[i]->d_name, 0);
3075
if(dret == -1){
3076
if(errno == EISDIR){
3077
dret = unlinkat(dir_fd, direntries[i]->d_name,
3078
AT_REMOVEDIR);
3079
}
3080
if((dret == -1) and (errno == ENOTEMPTY)
3081
and (strcmp(direntries[i]->d_name, "private-keys-v1.d")
3082
== 0) and (level == 0)){
3083
/* Recurse only in this special case */
3084
clean_dir_at(dir_fd, direntries[i]->d_name, level+1);
3085
dret = 0;
3086
}
3087
if((dret == -1) and (errno != ENOENT)){
3088
fprintf_plus(stderr, "unlink(\"%s/%s\"): %s\n", dirname,
3089
direntries[i]->d_name, strerror(errno));
3090
}
3091
}
3092
free(direntries[i]);
3093
}
3094
3095
/* need to clean even if 0 because man page doesn't specify */
3096
free(direntries);
3097
if(numentries == -1){
3098
perror_plus("scandirat");
3099
}
3100
dret = unlinkat(base, dirname, AT_REMOVEDIR);
3101
if(dret == -1 and errno != ENOENT){
3102
perror_plus("rmdir");
3103
}
3104
} else {
3105
perror_plus("scandirat");
3106
}
3107
close(dir_fd);
3108
}
3109
3110
/* Removes the GPGME temp directory and all files inside */
3111
if(tempdir != NULL){
3112
clean_dir_at(-1, tempdir, 0);
2492
direntry = direntries[i];
2493
char *fullname = NULL;
2494
ret = asprintf(&fullname, "%s/%s", tempdir,
2495
direntry->d_name);
2496
if(ret < 0){
2497
perror_plus("asprintf");
2498
continue;
2499
}
2500
ret = remove(fullname);
2501
if(ret == -1){
2502
fprintf_plus(stderr, "remove(\"%s\"): %s\n", fullname,
2503
strerror(errno));
2504
}
2505
free(fullname);
2506
}
2507
}
2508
2509
/* need to clean even if 0 because man page doesn't specify */
2510
free(direntries);
2511
if (numentries == -1){
2512
perror_plus("scandir");
2513
}
2514
ret = rmdir(tempdir);
2515
if(ret == -1 and errno != ENOENT){
2516
perror_plus("rmdir");
2517
}
3113
2518
}
3114
2519
3115
2520
if(quit_now){
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0