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- Committer: Teddy Hogeborn
- Date: 2014-03-10 07:04:09 UTC
- Revision ID: teddy@recompile.se-20140310070409-ho6p1wrnpopi2ny1
White space fix: change "if (" to "if(" in C code.
* plugins.d/askpass-fifo.c (error_plus): White space fix.
* plugins.d/password-prompt.c (error_plus, conflict_detection,
main): - '' -
* plugins.d/plymouth.c (error_plus, exec_and_wait, get_pid): - '' -
* plugins.d/splashy.c (error_plus): - '' -
* plugins.d/usplash.c (error_plus): - '' -
* plugins.d/askpass-fifo.c (error_plus): White space fix.
* plugins.d/password-prompt.c (error_plus, conflict_detection,
main): - '' -
* plugins.d/plymouth.c (error_plus, exec_and_wait, get_pid): - '' -
* plugins.d/splashy.c (error_plus): - '' -
* plugins.d/usplash.c (error_plus): - '' -
- 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,
420
396
if(result == NULL){
421
397
fprintf_plus(stderr, "gpgme_op_decrypt_result failed\n");
422
398
} else {
423
if(result->unsupported_algorithm != NULL) {
424
fprintf_plus(stderr, "Unsupported algorithm: %s\n",
425
result->unsupported_algorithm);
426
}
399
fprintf_plus(stderr, "Unsupported algorithm: %s\n",
400
result->unsupported_algorithm);
427
401
fprintf_plus(stderr, "Wrong key usage: %u\n",
428
402
result->wrong_key_usage);
429
403
if(result->file_name != NULL){
501
475
return plaintext_length;
502
476
}
503
477
504
__attribute__((warn_unused_result, const))
505
static const char *safe_string(const char *str){
506
if(str == NULL)
507
return "(unknown)";
508
return str;
509
}
510
511
__attribute__((warn_unused_result))
512
static const char *safer_gnutls_strerror(int value){
478
static const char * safer_gnutls_strerror(int value){
513
479
const char *ret = gnutls_strerror(value);
514
return safe_string(ret);
480
if(ret == NULL)
481
ret = "(unknown)";
482
return ret;
515
483
}
516
484
517
485
/* GnuTLS log function callback */
518
__attribute__((nonnull))
519
486
static void debuggnutls(__attribute__((unused)) int level,
520
487
const char* string){
521
488
fprintf_plus(stderr, "GnuTLS: %s", string);
522
489
}
523
490
524
__attribute__((nonnull(1, 2, 4), warn_unused_result))
525
491
static int init_gnutls_global(const char *pubkeyfilename,
526
492
const char *seckeyfilename,
527
const char *dhparamsfilename,
528
493
mandos_context *mc){
529
494
int ret;
530
unsigned int uret;
531
495
532
496
if(debug){
533
497
fprintf_plus(stderr, "Initializing GnuTLS\n");
534
498
}
535
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
536
507
if(debug){
537
508
/* "Use a log level over 10 to enable all debugging options."
538
509
* - GnuTLS manual
546
517
if(ret != GNUTLS_E_SUCCESS){
547
518
fprintf_plus(stderr, "GnuTLS memory error: %s\n",
548
519
safer_gnutls_strerror(ret));
520
gnutls_global_deinit();
549
521
return -1;
550
522
}
551
523
576
548
safer_gnutls_strerror(ret));
577
549
goto globalfail;
578
550
}
579
/* If a Diffie-Hellman parameters file was given, try to use it */
580
if(dhparamsfilename != NULL){
581
gnutls_datum_t params = { .data = NULL, .size = 0 };
582
do {
583
int dhpfile = open(dhparamsfilename, O_RDONLY);
584
if(dhpfile == -1){
585
perror_plus("open");
586
dhparamsfilename = NULL;
587
break;
588
}
589
size_t params_capacity = 0;
590
while(true){
591
params_capacity = incbuffer((char **)¶ms.data,
592
(size_t)params.size,
593
(size_t)params_capacity);
594
if(params_capacity == 0){
595
perror_plus("incbuffer");
596
free(params.data);
597
params.data = NULL;
598
dhparamsfilename = NULL;
599
break;
600
}
601
ssize_t bytes_read = read(dhpfile,
602
params.data + params.size,
603
BUFFER_SIZE);
604
/* EOF */
605
if(bytes_read == 0){
606
break;
607
}
608
/* check bytes_read for failure */
609
if(bytes_read < 0){
610
perror_plus("read");
611
free(params.data);
612
params.data = NULL;
613
dhparamsfilename = NULL;
614
break;
615
}
616
params.size += (unsigned int)bytes_read;
617
}
618
ret = close(dhpfile);
619
if(ret == -1){
620
perror_plus("close");
621
}
622
if(params.data == NULL){
623
dhparamsfilename = NULL;
624
}
625
if(dhparamsfilename == NULL){
626
break;
627
}
628
ret = gnutls_dh_params_import_pkcs3(mc->dh_params, ¶ms,
629
GNUTLS_X509_FMT_PEM);
630
if(ret != GNUTLS_E_SUCCESS){
631
fprintf_plus(stderr, "Failed to parse DH parameters in file"
632
" \"%s\": %s\n", dhparamsfilename,
633
safer_gnutls_strerror(ret));
634
dhparamsfilename = NULL;
635
}
636
free(params.data);
637
} while(false);
638
}
639
if(dhparamsfilename == NULL){
640
if(mc->dh_bits == 0){
641
/* Find out the optimal number of DH bits */
642
/* Try to read the private key file */
643
gnutls_datum_t buffer = { .data = NULL, .size = 0 };
644
do {
645
int secfile = open(seckeyfilename, O_RDONLY);
646
if(secfile == -1){
647
perror_plus("open");
648
break;
649
}
650
size_t buffer_capacity = 0;
651
while(true){
652
buffer_capacity = incbuffer((char **)&buffer.data,
653
(size_t)buffer.size,
654
(size_t)buffer_capacity);
655
if(buffer_capacity == 0){
656
perror_plus("incbuffer");
657
free(buffer.data);
658
buffer.data = NULL;
659
break;
660
}
661
ssize_t bytes_read = read(secfile,
662
buffer.data + buffer.size,
663
BUFFER_SIZE);
664
/* EOF */
665
if(bytes_read == 0){
666
break;
667
}
668
/* check bytes_read for failure */
669
if(bytes_read < 0){
670
perror_plus("read");
671
free(buffer.data);
672
buffer.data = NULL;
673
break;
674
}
675
buffer.size += (unsigned int)bytes_read;
676
}
677
close(secfile);
678
} while(false);
679
/* If successful, use buffer to parse private key */
680
gnutls_sec_param_t sec_param = GNUTLS_SEC_PARAM_ULTRA;
681
if(buffer.data != NULL){
682
{
683
gnutls_openpgp_privkey_t privkey = NULL;
684
ret = gnutls_openpgp_privkey_init(&privkey);
685
if(ret != GNUTLS_E_SUCCESS){
686
fprintf_plus(stderr, "Error initializing OpenPGP key"
687
" structure: %s",
688
safer_gnutls_strerror(ret));
689
free(buffer.data);
690
buffer.data = NULL;
691
} else {
692
ret = gnutls_openpgp_privkey_import
693
(privkey, &buffer, GNUTLS_OPENPGP_FMT_BASE64, "", 0);
694
if(ret != GNUTLS_E_SUCCESS){
695
fprintf_plus(stderr, "Error importing OpenPGP key : %s",
696
safer_gnutls_strerror(ret));
697
privkey = NULL;
698
}
699
free(buffer.data);
700
buffer.data = NULL;
701
if(privkey != NULL){
702
/* Use private key to suggest an appropriate
703
sec_param */
704
sec_param = gnutls_openpgp_privkey_sec_param(privkey);
705
gnutls_openpgp_privkey_deinit(privkey);
706
if(debug){
707
fprintf_plus(stderr, "This OpenPGP key implies using"
708
" a GnuTLS security parameter \"%s\".\n",
709
safe_string(gnutls_sec_param_get_name
710
(sec_param)));
711
}
712
}
713
}
714
}
715
if(sec_param == GNUTLS_SEC_PARAM_UNKNOWN){
716
/* Err on the side of caution */
717
sec_param = GNUTLS_SEC_PARAM_ULTRA;
718
if(debug){
719
fprintf_plus(stderr, "Falling back to security parameter"
720
" \"%s\"\n",
721
safe_string(gnutls_sec_param_get_name
722
(sec_param)));
723
}
724
}
725
}
726
uret = gnutls_sec_param_to_pk_bits(GNUTLS_PK_DH, sec_param);
727
if(uret != 0){
728
mc->dh_bits = uret;
729
if(debug){
730
fprintf_plus(stderr, "A \"%s\" GnuTLS security parameter"
731
" implies %u DH bits; using that.\n",
732
safe_string(gnutls_sec_param_get_name
733
(sec_param)),
734
mc->dh_bits);
735
}
736
} else {
737
fprintf_plus(stderr, "Failed to get implied number of DH"
738
" bits for security parameter \"%s\"): %s\n",
739
safe_string(gnutls_sec_param_get_name
740
(sec_param)),
741
safer_gnutls_strerror(ret));
742
goto globalfail;
743
}
744
} else if(debug){
745
fprintf_plus(stderr, "DH bits explicitly set to %u\n",
746
mc->dh_bits);
747
}
748
ret = gnutls_dh_params_generate2(mc->dh_params, mc->dh_bits);
749
if(ret != GNUTLS_E_SUCCESS){
750
fprintf_plus(stderr, "Error in GnuTLS prime generation (%u"
751
" bits): %s\n", mc->dh_bits,
752
safer_gnutls_strerror(ret));
753
goto globalfail;
754
}
755
}
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
756
558
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
757
559
758
560
return 0;
760
562
globalfail:
761
563
762
564
gnutls_certificate_free_credentials(mc->cred);
565
gnutls_global_deinit();
763
566
gnutls_dh_params_deinit(mc->dh_params);
764
567
return -1;
765
568
}
766
569
767
__attribute__((nonnull, warn_unused_result))
768
570
static int init_gnutls_session(gnutls_session_t *session,
769
571
mandos_context *mc){
770
572
int ret;
817
619
/* ignore client certificate if any. */
818
620
gnutls_certificate_server_set_request(*session, GNUTLS_CERT_IGNORE);
819
621
622
gnutls_dh_set_prime_bits(*session, mc->dh_bits);
623
820
624
return 0;
821
625
}
822
626
824
628
static void empty_log(__attribute__((unused)) AvahiLogLevel level,
825
629
__attribute__((unused)) const char *txt){}
826
630
827
/* Set effective uid to 0, return errno */
828
__attribute__((warn_unused_result))
829
int raise_privileges(void){
830
int old_errno = errno;
831
int ret = 0;
832
if(seteuid(0) == -1){
833
ret = errno;
834
}
835
errno = old_errno;
836
return ret;
837
}
838
839
/* Set effective and real user ID to 0. Return errno. */
840
__attribute__((warn_unused_result))
841
int raise_privileges_permanently(void){
842
int old_errno = errno;
843
int ret = raise_privileges();
844
if(ret != 0){
845
errno = old_errno;
846
return ret;
847
}
848
if(setuid(0) == -1){
849
ret = errno;
850
}
851
errno = old_errno;
852
return ret;
853
}
854
855
/* Set effective user ID to unprivileged saved user ID */
856
__attribute__((warn_unused_result))
857
int lower_privileges(void){
858
int old_errno = errno;
859
int ret = 0;
860
if(seteuid(uid) == -1){
861
ret = errno;
862
}
863
errno = old_errno;
864
return ret;
865
}
866
867
/* Lower privileges permanently */
868
__attribute__((warn_unused_result))
869
int lower_privileges_permanently(void){
870
int old_errno = errno;
871
int ret = 0;
872
if(setuid(uid) == -1){
873
ret = errno;
874
}
875
errno = old_errno;
876
return ret;
877
}
878
879
/* Helper function to add_local_route() and delete_local_route() */
880
__attribute__((nonnull, warn_unused_result))
881
static bool add_delete_local_route(const bool add,
882
const char *address,
883
AvahiIfIndex if_index){
884
int ret;
885
char helper[] = "mandos-client-iprouteadddel";
886
char add_arg[] = "add";
887
char delete_arg[] = "delete";
888
char debug_flag[] = "--debug";
889
char *pluginhelperdir = getenv("MANDOSPLUGINHELPERDIR");
890
if(pluginhelperdir == NULL){
891
if(debug){
892
fprintf_plus(stderr, "MANDOSPLUGINHELPERDIR environment"
893
" variable not set; cannot run helper\n");
894
}
895
return false;
896
}
897
898
char interface[IF_NAMESIZE];
899
if(if_indextoname((unsigned int)if_index, interface) == NULL){
900
perror_plus("if_indextoname");
901
return false;
902
}
903
904
int devnull = (int)TEMP_FAILURE_RETRY(open("/dev/null", O_RDONLY));
905
if(devnull == -1){
906
perror_plus("open(\"/dev/null\", O_RDONLY)");
907
return false;
908
}
909
pid_t pid = fork();
910
if(pid == 0){
911
/* Child */
912
/* Raise privileges */
913
errno = raise_privileges_permanently();
914
if(errno != 0){
915
perror_plus("Failed to raise privileges");
916
/* _exit(EX_NOPERM); */
917
} else {
918
/* Set group */
919
errno = 0;
920
ret = setgid(0);
921
if(ret == -1){
922
perror_plus("setgid");
923
_exit(EX_NOPERM);
924
}
925
/* Reset supplementary groups */
926
errno = 0;
927
ret = setgroups(0, NULL);
928
if(ret == -1){
929
perror_plus("setgroups");
930
_exit(EX_NOPERM);
931
}
932
}
933
ret = dup2(devnull, STDIN_FILENO);
934
if(ret == -1){
935
perror_plus("dup2(devnull, STDIN_FILENO)");
936
_exit(EX_OSERR);
937
}
938
ret = close(devnull);
939
if(ret == -1){
940
perror_plus("close");
941
_exit(EX_OSERR);
942
}
943
ret = dup2(STDERR_FILENO, STDOUT_FILENO);
944
if(ret == -1){
945
perror_plus("dup2(STDERR_FILENO, STDOUT_FILENO)");
946
_exit(EX_OSERR);
947
}
948
int helperdir_fd = (int)TEMP_FAILURE_RETRY(open(pluginhelperdir,
949
O_RDONLY
950
| O_DIRECTORY
951
| O_PATH
952
| O_CLOEXEC));
953
if(helperdir_fd == -1){
954
perror_plus("open");
955
_exit(EX_UNAVAILABLE);
956
}
957
int helper_fd = (int)TEMP_FAILURE_RETRY(openat(helperdir_fd,
958
helper, O_RDONLY));
959
if(helper_fd == -1){
960
perror_plus("openat");
961
close(helperdir_fd);
962
_exit(EX_UNAVAILABLE);
963
}
964
close(helperdir_fd);
965
#ifdef __GNUC__
966
#pragma GCC diagnostic push
967
#pragma GCC diagnostic ignored "-Wcast-qual"
968
#endif
969
if(fexecve(helper_fd, (char *const [])
970
{ helper, add ? add_arg : delete_arg, (char *)address,
971
interface, debug ? debug_flag : NULL, NULL },
972
environ) == -1){
973
#ifdef __GNUC__
974
#pragma GCC diagnostic pop
975
#endif
976
perror_plus("fexecve");
977
_exit(EXIT_FAILURE);
978
}
979
}
980
if(pid == -1){
981
perror_plus("fork");
982
return false;
983
}
984
int status;
985
pid_t pret = -1;
986
errno = 0;
987
do {
988
pret = waitpid(pid, &status, 0);
989
if(pret == -1 and errno == EINTR and quit_now){
990
int errno_raising = 0;
991
if((errno = raise_privileges()) != 0){
992
errno_raising = errno;
993
perror_plus("Failed to raise privileges in order to"
994
" kill helper program");
995
}
996
if(kill(pid, SIGTERM) == -1){
997
perror_plus("kill");
998
}
999
if((errno_raising == 0) and (errno = lower_privileges()) != 0){
1000
perror_plus("Failed to lower privileges after killing"
1001
" helper program");
1002
}
1003
return false;
1004
}
1005
} while(pret == -1 and errno == EINTR);
1006
if(pret == -1){
1007
perror_plus("waitpid");
1008
return false;
1009
}
1010
if(WIFEXITED(status)){
1011
if(WEXITSTATUS(status) != 0){
1012
fprintf_plus(stderr, "Error: iprouteadddel exited"
1013
" with status %d\n", WEXITSTATUS(status));
1014
return false;
1015
}
1016
return true;
1017
}
1018
if(WIFSIGNALED(status)){
1019
fprintf_plus(stderr, "Error: iprouteadddel died by"
1020
" signal %d\n", WTERMSIG(status));
1021
return false;
1022
}
1023
fprintf_plus(stderr, "Error: iprouteadddel crashed\n");
1024
return false;
1025
}
1026
1027
__attribute__((nonnull, warn_unused_result))
1028
static bool add_local_route(const char *address,
1029
AvahiIfIndex if_index){
1030
if(debug){
1031
fprintf_plus(stderr, "Adding route to %s\n", address);
1032
}
1033
return add_delete_local_route(true, address, if_index);
1034
}
1035
1036
__attribute__((nonnull, warn_unused_result))
1037
static bool delete_local_route(const char *address,
1038
AvahiIfIndex if_index){
1039
if(debug){
1040
fprintf_plus(stderr, "Removing route to %s\n", address);
1041
}
1042
return add_delete_local_route(false, address, if_index);
1043
}
1044
1045
631
/* Called when a Mandos server is found */
1046
__attribute__((nonnull, warn_unused_result))
1047
632
static int start_mandos_communication(const char *ip, in_port_t port,
1048
633
AvahiIfIndex if_index,
1049
634
int af, mandos_context *mc){
1058
643
int retval = -1;
1059
644
gnutls_session_t session;
1060
645
int pf; /* Protocol family */
1061
bool route_added = false;
1062
646
1063
647
errno = 0;
1064
648
1086
670
bool match = false;
1087
671
{
1088
672
char *interface = NULL;
1089
while((interface = argz_next(mc->interfaces,
1090
mc->interfaces_size,
1091
interface))){
673
while((interface=argz_next(mc->interfaces, mc->interfaces_size,
674
interface))){
1092
675
if(if_nametoindex(interface) == (unsigned int)if_index){
1093
676
match = true;
1094
677
break;
1123
706
PRIuMAX "\n", ip, (uintmax_t)port);
1124
707
}
1125
708
1126
tcp_sd = socket(pf, SOCK_STREAM | SOCK_CLOEXEC, 0);
709
tcp_sd = socket(pf, SOCK_STREAM, 0);
1127
710
if(tcp_sd < 0){
1128
711
int e = errno;
1129
712
perror_plus("socket");
1136
719
goto mandos_end;
1137
720
}
1138
721
722
memset(&to, 0, sizeof(to));
1139
723
if(af == AF_INET6){
1140
struct sockaddr_in6 *to6 = (struct sockaddr_in6 *)&to;
1141
*to6 = (struct sockaddr_in6){ .sin6_family = (sa_family_t)af };
1142
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);
1143
726
} else { /* IPv4 */
1144
struct sockaddr_in *to4 = (struct sockaddr_in *)&to;
1145
*to4 = (struct sockaddr_in){ .sin_family = (sa_family_t)af };
1146
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);
1147
729
}
1148
730
if(ret < 0 ){
1149
731
int e = errno;
1158
740
goto mandos_end;
1159
741
}
1160
742
if(af == AF_INET6){
1161
((struct sockaddr_in6 *)&to)->sin6_port = htons(port);
743
((struct sockaddr_in6 *)&to)->sin6_port = htons(port);
1162
744
if(IN6_IS_ADDR_LINKLOCAL
1163
745
(&((struct sockaddr_in6 *)&to)->sin6_addr)){
1164
746
if(if_index == AVAHI_IF_UNSPEC){
1219
801
goto mandos_end;
1220
802
}
1221
803
1222
while(true){
1223
if(af == AF_INET6){
1224
ret = connect(tcp_sd, (struct sockaddr *)&to,
1225
sizeof(struct sockaddr_in6));
1226
} else {
1227
ret = connect(tcp_sd, (struct sockaddr *)&to, /* IPv4 */
1228
sizeof(struct sockaddr_in));
1229
}
1230
if(ret < 0){
1231
if(((errno == ENETUNREACH) or (errno == EHOSTUNREACH))
1232
and if_index != AVAHI_IF_UNSPEC
1233
and connect_to == NULL
1234
and not route_added and
1235
((af == AF_INET6 and not
1236
IN6_IS_ADDR_LINKLOCAL(&(((struct sockaddr_in6 *)
1237
&to)->sin6_addr)))
1238
or (af == AF_INET and
1239
/* Not a a IPv4LL address */
1240
(ntohl(((struct sockaddr_in *)&to)->sin_addr.s_addr)
1241
& 0xFFFF0000L) != 0xA9FE0000L))){
1242
/* Work around Avahi bug - Avahi does not announce link-local
1243
addresses if it has a global address, so local hosts with
1244
*only* a link-local address (e.g. Mandos clients) cannot
1245
connect to a Mandos server announced by Avahi on a server
1246
host with a global address. Work around this by retrying
1247
with an explicit route added with the server's address.
1248
1249
Avahi bug reference:
1250
https://lists.freedesktop.org/archives/avahi/2010-February/001833.html
1251
https://bugs.debian.org/587961
1252
*/
1253
if(debug){
1254
fprintf_plus(stderr, "Mandos server unreachable, trying"
1255
" direct route\n");
1256
}
1257
int e = errno;
1258
route_added = add_local_route(ip, if_index);
1259
if(route_added){
1260
continue;
1261
}
1262
errno = e;
1263
}
1264
if(errno != ECONNREFUSED or debug){
1265
int e = errno;
1266
perror_plus("connect");
1267
errno = e;
1268
}
1269
goto mandos_end;
1270
}
1271
1272
if(quit_now){
1273
errno = EINTR;
1274
goto mandos_end;
1275
}
1276
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;
1277
823
}
1278
824
1279
825
const char *out = mandos_protocol_version;
1433
979
&decrypted_buffer, mc);
1434
980
if(decrypted_buffer_size >= 0){
1435
981
1436
clearerr(stdout);
1437
982
written = 0;
1438
983
while(written < (size_t) decrypted_buffer_size){
1439
984
if(quit_now){
1455
1000
}
1456
1001
written += (size_t)ret;
1457
1002
}
1458
ret = fflush(stdout);
1459
if(ret != 0){
1460
int e = errno;
1461
if(debug){
1462
fprintf_plus(stderr, "Error writing encrypted data: %s\n",
1463
strerror(errno));
1464
}
1465
errno = e;
1466
goto mandos_end;
1467
}
1468
1003
retval = 0;
1469
1004
}
1470
1005
}
1473
1008
1474
1009
mandos_end:
1475
1010
{
1476
if(route_added){
1477
if(not delete_local_route(ip, if_index)){
1478
fprintf_plus(stderr, "Failed to delete local route to %s on"
1479
" interface %d", ip, if_index);
1480
}
1481
}
1482
1011
int e = errno;
1483
1012
free(decrypted_buffer);
1484
1013
free(buffer);
1485
1014
if(tcp_sd >= 0){
1486
ret = close(tcp_sd);
1015
ret = (int)TEMP_FAILURE_RETRY(close(tcp_sd));
1487
1016
}
1488
1017
if(ret == -1){
1489
1018
if(e == 0){
1514
1043
AVAHI_GCC_UNUSED AvahiStringList *txt,
1515
1044
AVAHI_GCC_UNUSED AvahiLookupResultFlags
1516
1045
flags,
1517
void *mc){
1046
void* mc){
1518
1047
if(r == NULL){
1519
1048
return;
1520
1049
}
1523
1052
timed out */
1524
1053
1525
1054
if(quit_now){
1526
avahi_s_service_resolver_free(r);
1527
1055
return;
1528
1056
}
1529
1057
1574
1102
const char *domain,
1575
1103
AVAHI_GCC_UNUSED AvahiLookupResultFlags
1576
1104
flags,
1577
void *mc){
1105
void* mc){
1578
1106
if(b == NULL){
1579
1107
return;
1580
1108
}
1640
1168
errno = old_errno;
1641
1169
}
1642
1170
1643
__attribute__((nonnull, warn_unused_result))
1644
1171
bool get_flags(const char *ifname, struct ifreq *ifr){
1645
1172
int ret;
1646
int old_errno;
1173
error_t ret_errno;
1647
1174
1648
1175
int s = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1649
1176
if(s < 0){
1650
old_errno = errno;
1177
ret_errno = errno;
1651
1178
perror_plus("socket");
1652
errno = old_errno;
1179
errno = ret_errno;
1653
1180
return false;
1654
1181
}
1655
strncpy(ifr->ifr_name, ifname, IF_NAMESIZE);
1656
ifr->ifr_name[IF_NAMESIZE-1] = '\0'; /* NUL terminate */
1182
strcpy(ifr->ifr_name, ifname);
1657
1183
ret = ioctl(s, SIOCGIFFLAGS, ifr);
1658
1184
if(ret == -1){
1659
1185
if(debug){
1660
old_errno = errno;
1186
ret_errno = errno;
1661
1187
perror_plus("ioctl SIOCGIFFLAGS");
1662
errno = old_errno;
1663
}
1664
if((close(s) == -1) and debug){
1665
old_errno = errno;
1666
perror_plus("close");
1667
errno = old_errno;
1188
errno = ret_errno;
1668
1189
}
1669
1190
return false;
1670
1191
}
1671
if((close(s) == -1) and debug){
1672
old_errno = errno;
1673
perror_plus("close");
1674
errno = old_errno;
1675
}
1676
1192
return true;
1677
1193
}
1678
1194
1679
__attribute__((nonnull, warn_unused_result))
1680
1195
bool good_flags(const char *ifname, const struct ifreq *ifr){
1681
1196
1682
1197
/* Reject the loopback device */
1724
1239
* corresponds to an acceptable network device.
1725
1240
* (This function is passed to scandir(3) as a filter function.)
1726
1241
*/
1727
__attribute__((nonnull, warn_unused_result))
1728
1242
int good_interface(const struct dirent *if_entry){
1729
1243
if(if_entry->d_name[0] == '.'){
1730
1244
return 0;
1748
1262
/*
1749
1263
* This function determines if a network interface is up.
1750
1264
*/
1751
__attribute__((nonnull, warn_unused_result))
1752
1265
bool interface_is_up(const char *interface){
1753
1266
struct ifreq ifr;
1754
1267
if(not get_flags(interface, &ifr)){
1765
1278
/*
1766
1279
* This function determines if a network interface is running
1767
1280
*/
1768
__attribute__((nonnull, warn_unused_result))
1769
1281
bool interface_is_running(const char *interface){
1770
1282
struct ifreq ifr;
1771
1283
if(not get_flags(interface, &ifr)){
1779
1291
return (bool)(ifr.ifr_flags & IFF_RUNNING);
1780
1292
}
1781
1293
1782
__attribute__((nonnull, pure, warn_unused_result))
1783
1294
int notdotentries(const struct dirent *direntry){
1784
1295
/* Skip "." and ".." */
1785
1296
if(direntry->d_name[0] == '.'
1792
1303
}
1793
1304
1794
1305
/* Is this directory entry a runnable program? */
1795
__attribute__((nonnull, warn_unused_result))
1796
1306
int runnable_hook(const struct dirent *direntry){
1797
1307
int ret;
1798
1308
size_t sret;
1806
1316
sret = strspn(direntry->d_name, "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
1807
1317
"abcdefghijklmnopqrstuvwxyz"
1808
1318
"0123456789"
1809
"_.-");
1319
"_-");
1810
1320
if((direntry->d_name)[sret] != '\0'){
1811
1321
/* Contains non-allowed characters */
1812
1322
if(debug){
1816
1326
return 0;
1817
1327
}
1818
1328
1819
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);
1820
1337
if(ret == -1){
1821
1338
if(debug){
1822
1339
perror_plus("Could not stat hook");
1846
1363
return 1;
1847
1364
}
1848
1365
1849
__attribute__((nonnull, warn_unused_result))
1850
1366
int avahi_loop_with_timeout(AvahiSimplePoll *s, int retry_interval,
1851
1367
mandos_context *mc){
1852
1368
int ret;
1856
1372
1857
1373
while(true){
1858
1374
if(mc->current_server == NULL){
1859
if(debug){
1375
if (debug){
1860
1376
fprintf_plus(stderr, "Wait until first server is found."
1861
1377
" No timeout!\n");
1862
1378
}
1863
1379
ret = avahi_simple_poll_iterate(s, -1);
1864
1380
} else {
1865
if(debug){
1381
if (debug){
1866
1382
fprintf_plus(stderr, "Check current_server if we should run"
1867
1383
" it, or wait\n");
1868
1384
}
1885
1401
- ((intmax_t)waited_time.tv_sec * 1000))
1886
1402
- ((intmax_t)waited_time.tv_nsec / 1000000));
1887
1403
1888
if(debug){
1404
if (debug){
1889
1405
fprintf_plus(stderr, "Blocking for %" PRIdMAX " ms\n",
1890
1406
block_time);
1891
1407
}
1913
1429
ret = avahi_simple_poll_iterate(s, (int)block_time);
1914
1430
}
1915
1431
if(ret != 0){
1916
if(ret > 0 or errno != EINTR){
1432
if (ret > 0 or errno != EINTR){
1917
1433
return (ret != 1) ? ret : 0;
1918
1434
}
1919
1435
}
1920
1436
}
1921
1437
}
1922
1438
1923
__attribute__((nonnull))
1924
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,
1925
1492
const float delay){
1926
struct dirent **direntries = NULL;
1927
if(hookdir_fd == -1){
1928
hookdir_fd = open(hookdir, O_RDONLY | O_DIRECTORY | O_PATH
1929
| O_CLOEXEC);
1930
if(hookdir_fd == -1){
1931
if(errno == ENOENT){
1932
if(debug){
1933
fprintf_plus(stderr, "Network hook directory \"%s\" not"
1934
" found\n", hookdir);
1935
}
1936
} else {
1937
perror_plus("open");
1938
}
1939
return;
1940
}
1941
}
1942
int devnull = (int)TEMP_FAILURE_RETRY(open("/dev/null", O_RDONLY));
1943
if(devnull == -1){
1944
perror_plus("open(\"/dev/null\", O_RDONLY)");
1945
return;
1946
}
1947
int numhooks = scandirat(hookdir_fd, ".", &direntries,
1948
runnable_hook, alphasort);
1493
struct dirent **direntries;
1494
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1495
alphasort);
1949
1496
if(numhooks == -1){
1950
perror_plus("scandir");
1951
close(devnull);
1952
return;
1953
}
1954
struct dirent *direntry;
1955
int ret;
1956
for(int i = 0; i < numhooks; i++){
1957
direntry = direntries[i];
1958
if(debug){
1959
fprintf_plus(stderr, "Running network hook \"%s\"\n",
1960
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");
1961
1504
}
1962
pid_t hook_pid = fork();
1963
if(hook_pid == 0){
1964
/* Child */
1965
/* Raise privileges */
1966
errno = raise_privileges_permanently();
1967
if(errno != 0){
1968
perror_plus("Failed to raise privileges");
1969
_exit(EX_NOPERM);
1970
}
1971
/* Set group */
1972
errno = 0;
1973
ret = setgid(0);
1974
if(ret == -1){
1975
perror_plus("setgid");
1976
_exit(EX_NOPERM);
1977
}
1978
/* Reset supplementary groups */
1979
errno = 0;
1980
ret = setgroups(0, NULL);
1981
if(ret == -1){
1982
perror_plus("setgroups");
1983
_exit(EX_NOPERM);
1984
}
1985
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1986
if(ret == -1){
1987
perror_plus("setenv");
1988
_exit(EX_OSERR);
1989
}
1990
ret = setenv("DEVICE", interface, 1);
1991
if(ret == -1){
1992
perror_plus("setenv");
1993
_exit(EX_OSERR);
1994
}
1995
ret = setenv("VERBOSITY", debug ? "1" : "0", 1);
1996
if(ret == -1){
1997
perror_plus("setenv");
1998
_exit(EX_OSERR);
1999
}
2000
ret = setenv("MODE", mode, 1);
2001
if(ret == -1){
2002
perror_plus("setenv");
2003
_exit(EX_OSERR);
2004
}
2005
char *delaystring;
2006
ret = asprintf(&delaystring, "%f", (double)delay);
2007
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){
2008
1514
perror_plus("asprintf");
2009
_exit(EX_OSERR);
2010
}
2011
ret = setenv("DELAY", delaystring, 1);
2012
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
}
2013
1573
free(delaystring);
2014
perror_plus("setenv");
2015
_exit(EX_OSERR);
2016
}
2017
free(delaystring);
2018
if(connect_to != NULL){
2019
ret = setenv("CONNECT", connect_to, 1);
2020
if(ret == -1){
2021
perror_plus("setenv");
2022
_exit(EX_OSERR);
2023
}
2024
}
2025
int hook_fd = (int)TEMP_FAILURE_RETRY(openat(hookdir_fd,
2026
direntry->d_name,
2027
O_RDONLY));
2028
if(hook_fd == -1){
2029
perror_plus("openat");
2030
_exit(EXIT_FAILURE);
2031
}
2032
if(close(hookdir_fd) == -1){
2033
perror_plus("close");
2034
_exit(EXIT_FAILURE);
2035
}
2036
ret = dup2(devnull, STDIN_FILENO);
2037
if(ret == -1){
2038
perror_plus("dup2(devnull, STDIN_FILENO)");
2039
_exit(EX_OSERR);
2040
}
2041
ret = close(devnull);
2042
if(ret == -1){
2043
perror_plus("close");
2044
_exit(EX_OSERR);
2045
}
2046
ret = dup2(STDERR_FILENO, STDOUT_FILENO);
2047
if(ret == -1){
2048
perror_plus("dup2(STDERR_FILENO, STDOUT_FILENO)");
2049
_exit(EX_OSERR);
2050
}
2051
if(fexecve(hook_fd, (char *const []){ direntry->d_name, NULL },
2052
environ) == -1){
2053
perror_plus("fexecve");
2054
_exit(EXIT_FAILURE);
2055
}
2056
} else {
2057
if(hook_pid == -1){
2058
perror_plus("fork");
2059
free(direntry);
2060
continue;
2061
}
2062
int status;
2063
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
2064
perror_plus("waitpid");
2065
free(direntry);
2066
continue;
2067
}
2068
if(WIFEXITED(status)){
2069
if(WEXITSTATUS(status) != 0){
2070
fprintf_plus(stderr, "Warning: network hook \"%s\" exited"
2071
" with status %d\n", direntry->d_name,
2072
WEXITSTATUS(status));
2073
free(direntry);
2074
continue;
2075
}
2076
} else if(WIFSIGNALED(status)){
2077
fprintf_plus(stderr, "Warning: network hook \"%s\" died by"
2078
" signal %d\n", direntry->d_name,
2079
WTERMSIG(status));
2080
free(direntry);
2081
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
}
2082
1585
} else {
2083
fprintf_plus(stderr, "Warning: network hook \"%s\""
2084
" crashed\n", direntry->d_name);
2085
free(direntry);
2086
continue;
2087
}
2088
}
2089
if(debug){
2090
fprintf_plus(stderr, "Network hook \"%s\" ran successfully\n",
2091
direntry->d_name);
2092
}
2093
free(direntry);
2094
}
2095
free(direntries);
2096
if(close(hookdir_fd) == -1){
2097
perror_plus("close");
2098
} else {
2099
hookdir_fd = -1;
2100
}
2101
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;
2102
1622
}
2103
1623
2104
__attribute__((nonnull, warn_unused_result))
2105
int bring_up_interface(const char *const interface,
2106
const float delay){
2107
int old_errno = errno;
2108
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;
2109
1630
struct ifreq network;
2110
1631
unsigned int if_index = if_nametoindex(interface);
2111
1632
if(if_index == 0){
2120
1641
}
2121
1642
2122
1643
if(not interface_is_up(interface)){
2123
int ret_errno = 0;
2124
int ioctl_errno = 0;
2125
if(not get_flags(interface, &network)){
1644
if(not get_flags(interface, &network) and debug){
2126
1645
ret_errno = errno;
2127
1646
fprintf_plus(stderr, "Failed to get flags for interface "
2128
1647
"\"%s\"\n", interface);
2129
errno = old_errno;
2130
1648
return ret_errno;
2131
1649
}
2132
network.ifr_flags |= IFF_UP; /* set flag */
1650
network.ifr_flags |= IFF_UP;
2133
1651
2134
int sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
2135
if(sd == -1){
1652
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1653
if(sd < 0){
2136
1654
ret_errno = errno;
2137
1655
perror_plus("socket");
2138
1656
errno = old_errno;
2139
1657
return ret_errno;
2140
1658
}
2141
1659
2142
1660
if(quit_now){
2143
ret = close(sd);
2144
if(ret == -1){
2145
perror_plus("close");
2146
}
1661
close(sd);
2147
1662
errno = old_errno;
2148
1663
return EINTR;
2149
1664
}
2153
1668
interface);
2154
1669
}
2155
1670
2156
/* Raise privileges */
2157
ret_errno = raise_privileges();
2158
if(ret_errno != 0){
2159
errno = ret_errno;
2160
perror_plus("Failed to raise privileges");
2161
}
1671
/* Raise priviliges */
1672
raise_privileges();
2162
1673
2163
1674
#ifdef __linux__
2164
int ret_linux;
2165
bool restore_loglevel = false;
2166
if(ret_errno == 0){
2167
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
2168
messages about the network interface to mess up the prompt */
2169
ret_linux = klogctl(8, NULL, 5);
2170
if(ret_linux == -1){
2171
perror_plus("klogctl");
2172
} else {
2173
restore_loglevel = true;
2174
}
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");
2175
1682
}
2176
1683
#endif /* __linux__ */
2177
int ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
2178
ioctl_errno = errno;
1684
ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1685
ret_errno = errno;
2179
1686
#ifdef __linux__
2180
1687
if(restore_loglevel){
2181
1688
ret_linux = klogctl(7, NULL, 0);
2185
1692
}
2186
1693
#endif /* __linux__ */
2187
1694
2188
/* If raise_privileges() succeeded above */
2189
if(ret_errno == 0){
2190
/* Lower privileges */
2191
ret_errno = lower_privileges();
2192
if(ret_errno != 0){
2193
errno = ret_errno;
2194
perror_plus("Failed to lower privileges");
2195
}
2196
}
1695
/* Lower privileges */
1696
lower_privileges();
2197
1697
2198
1698
/* Close the socket */
2199
ret = close(sd);
1699
ret = (int)TEMP_FAILURE_RETRY(close(sd));
2200
1700
if(ret == -1){
2201
1701
perror_plus("close");
2202
1702
}
2203
1703
2204
1704
if(ret_setflags == -1){
2205
errno = ioctl_errno;
1705
errno = ret_errno;
2206
1706
perror_plus("ioctl SIOCSIFFLAGS +IFF_UP");
2207
1707
errno = old_errno;
2208
return ioctl_errno;
1708
return ret_errno;
2209
1709
}
2210
1710
} else if(debug){
2211
1711
fprintf_plus(stderr, "Interface \"%s\" is already up; good\n",
2214
1714
2215
1715
/* Sleep checking until interface is running.
2216
1716
Check every 0.25s, up to total time of delay */
2217
for(int i = 0; i < delay * 4; i++){
1717
for(int i=0; i < delay * 4; i++){
2218
1718
if(interface_is_running(interface)){
2219
1719
break;
2220
1720
}
2229
1729
return 0;
2230
1730
}
2231
1731
2232
__attribute__((nonnull, warn_unused_result))
2233
int take_down_interface(const char *const interface){
2234
int old_errno = errno;
1732
error_t take_down_interface(const char *const interface){
1733
error_t old_errno = errno;
2235
1734
struct ifreq network;
2236
1735
unsigned int if_index = if_nametoindex(interface);
2237
1736
if(if_index == 0){
2240
1739
return ENXIO;
2241
1740
}
2242
1741
if(interface_is_up(interface)){
2243
int ret_errno = 0;
2244
int ioctl_errno = 0;
1742
error_t ret_errno = 0;
2245
1743
if(not get_flags(interface, &network) and debug){
2246
1744
ret_errno = errno;
2247
1745
fprintf_plus(stderr, "Failed to get flags for interface "
2248
1746
"\"%s\"\n", interface);
2249
errno = old_errno;
2250
1747
return ret_errno;
2251
1748
}
2252
1749
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
2253
1750
2254
1751
int sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
2255
if(sd == -1){
1752
if(sd < 0){
2256
1753
ret_errno = errno;
2257
1754
perror_plus("socket");
2258
1755
errno = old_errno;
2264
1761
interface);
2265
1762
}
2266
1763
2267
/* Raise privileges */
2268
ret_errno = raise_privileges();
2269
if(ret_errno != 0){
2270
errno = ret_errno;
2271
perror_plus("Failed to raise privileges");
2272
}
1764
/* Raise priviliges */
1765
raise_privileges();
2273
1766
2274
1767
int ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
2275
ioctl_errno = errno;
1768
ret_errno = errno;
2276
1769
2277
/* If raise_privileges() succeeded above */
2278
if(ret_errno == 0){
2279
/* Lower privileges */
2280
ret_errno = lower_privileges();
2281
if(ret_errno != 0){
2282
errno = ret_errno;
2283
perror_plus("Failed to lower privileges");
2284
}
2285
}
1770
/* Lower privileges */
1771
lower_privileges();
2286
1772
2287
1773
/* Close the socket */
2288
int ret = close(sd);
1774
int ret = (int)TEMP_FAILURE_RETRY(close(sd));
2289
1775
if(ret == -1){
2290
1776
perror_plus("close");
2291
1777
}
2292
1778
2293
1779
if(ret_setflags == -1){
2294
errno = ioctl_errno;
1780
errno = ret_errno;
2295
1781
perror_plus("ioctl SIOCSIFFLAGS -IFF_UP");
2296
1782
errno = old_errno;
2297
return ioctl_errno;
1783
return ret_errno;
2298
1784
}
2299
1785
} else if(debug){
2300
1786
fprintf_plus(stderr, "Interface \"%s\" is already down; odd\n",
2306
1792
}
2307
1793
2308
1794
int main(int argc, char *argv[]){
2309
mandos_context mc = { .server = NULL, .dh_bits = 0,
2310
.priority = "SECURE256:!CTYPE-X.509"
2311
":+CTYPE-OPENPGP:!RSA:+SIGN-DSA-SHA256",
2312
.current_server = NULL, .interfaces = NULL,
2313
.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 };
2314
1799
AvahiSServiceBrowser *sb = NULL;
2315
1800
error_t ret_errno;
2316
1801
int ret;
2319
1804
int exitcode = EXIT_SUCCESS;
2320
1805
char *interfaces_to_take_down = NULL;
2321
1806
size_t interfaces_to_take_down_size = 0;
2322
char run_tempdir[] = "/run/tmp/mandosXXXXXX";
2323
char old_tempdir[] = "/tmp/mandosXXXXXX";
2324
char *tempdir = NULL;
1807
char tempdir[] = "/tmp/mandosXXXXXX";
1808
bool tempdir_created = false;
2325
1809
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
2326
1810
const char *seckey = PATHDIR "/" SECKEY;
2327
1811
const char *pubkey = PATHDIR "/" PUBKEY;
2328
const char *dh_params_file = NULL;
2329
1812
char *interfaces_hooks = NULL;
2330
1813
2331
1814
bool gnutls_initialized = false;
2384
1867
.doc = "Bit length of the prime number used in the"
2385
1868
" Diffie-Hellman key exchange",
2386
1869
.group = 2 },
2387
{ .name = "dh-params", .key = 134,
2388
.arg = "FILE",
2389
.doc = "PEM-encoded PKCS#3 file with pre-generated parameters"
2390
" for the Diffie-Hellman key exchange",
2391
.group = 2 },
2392
1870
{ .name = "priority", .key = 130,
2393
1871
.arg = "STRING",
2394
1872
.doc = "GnuTLS priority string for the TLS handshake",
2449
1927
}
2450
1928
mc.dh_bits = (typeof(mc.dh_bits))tmpmax;
2451
1929
break;
2452
case 134: /* --dh-params */
2453
dh_params_file = arg;
2454
break;
2455
1930
case 130: /* --priority */
2456
1931
mc.priority = arg;
2457
1932
break;
2497
1972
.args_doc = "",
2498
1973
.doc = "Mandos client -- Get and decrypt"
2499
1974
" passwords from a Mandos server" };
2500
ret_errno = argp_parse(&argp, argc, argv,
2501
ARGP_IN_ORDER | ARGP_NO_HELP, 0, NULL);
2502
switch(ret_errno){
1975
ret = argp_parse(&argp, argc, argv,
1976
ARGP_IN_ORDER | ARGP_NO_HELP, 0, NULL);
1977
switch(ret){
2503
1978
case 0:
2504
1979
break;
2505
1980
case ENOMEM:
2506
1981
default:
2507
errno = ret_errno;
1982
errno = ret;
2508
1983
perror_plus("argp_parse");
2509
1984
exitcode = EX_OSERR;
2510
1985
goto end;
2513
1988
goto end;
2514
1989
}
2515
1990
}
2516
1991
2517
1992
{
2518
1993
/* Work around Debian bug #633582:
2519
<https://bugs.debian.org/633582> */
1994
<http://bugs.debian.org/633582> */
2520
1995
2521
/* Re-raise privileges */
2522
ret = raise_privileges();
2523
if(ret != 0){
2524
errno = ret;
2525
perror_plus("Failed to raise privileges");
2526
} else {
1996
/* Re-raise priviliges */
1997
if(raise_privileges() == 0){
2527
1998
struct stat st;
2528
1999
2529
2000
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
2543
2014
}
2544
2015
}
2545
2016
}
2546
close(seckey_fd);
2017
TEMP_FAILURE_RETRY(close(seckey_fd));
2547
2018
}
2548
2019
}
2549
2020
2550
2021
if(strcmp(pubkey, PATHDIR "/" PUBKEY) == 0){
2551
2022
int pubkey_fd = open(pubkey, O_RDONLY);
2552
2023
if(pubkey_fd == -1){
2564
2035
}
2565
2036
}
2566
2037
}
2567
close(pubkey_fd);
2568
}
2569
}
2570
2571
if(dh_params_file != NULL
2572
and strcmp(dh_params_file, PATHDIR "/dhparams.pem" ) == 0){
2573
int dhparams_fd = open(dh_params_file, O_RDONLY);
2574
if(dhparams_fd == -1){
2575
perror_plus("open");
2576
} else {
2577
ret = (int)TEMP_FAILURE_RETRY(fstat(dhparams_fd, &st));
2578
if(ret == -1){
2579
perror_plus("fstat");
2580
} else {
2581
if(S_ISREG(st.st_mode)
2582
and st.st_uid == 0 and st.st_gid == 0){
2583
ret = fchown(dhparams_fd, uid, gid);
2584
if(ret == -1){
2585
perror_plus("fchown");
2586
}
2587
}
2588
}
2589
close(dhparams_fd);
2590
}
2591
}
2592
2038
TEMP_FAILURE_RETRY(close(pubkey_fd));
2039
}
2040
}
2041
2593
2042
/* Lower privileges */
2594
ret = lower_privileges();
2595
if(ret != 0){
2596
errno = ret;
2597
perror_plus("Failed to lower privileges");
2598
}
2043
lower_privileges();
2599
2044
}
2600
2045
}
2601
2046
2627
2072
memcpy(interfaces_hooks, mc.interfaces, mc.interfaces_size);
2628
2073
argz_stringify(interfaces_hooks, mc.interfaces_size, (int)',');
2629
2074
}
2630
run_network_hooks("start", interfaces_hooks != NULL ?
2631
interfaces_hooks : "", delay);
2075
if(not run_network_hooks("start", interfaces_hooks != NULL ?
2076
interfaces_hooks : "", delay)){
2077
goto end;
2078
}
2632
2079
}
2633
2080
2634
2081
if(not debug){
2712
2159
2713
2160
/* If no interfaces were specified, make a list */
2714
2161
if(mc.interfaces == NULL){
2715
struct dirent **direntries = NULL;
2162
struct dirent **direntries;
2716
2163
/* Look for any good interfaces */
2717
2164
ret = scandir(sys_class_net, &direntries, good_interface,
2718
2165
alphasort);
2724
2171
if(ret_errno != 0){
2725
2172
errno = ret_errno;
2726
2173
perror_plus("argz_add");
2727
free(direntries[i]);
2728
2174
continue;
2729
2175
}
2730
2176
if(debug){
2731
2177
fprintf_plus(stderr, "Will use interface \"%s\"\n",
2732
2178
direntries[i]->d_name);
2733
2179
}
2734
free(direntries[i]);
2735
2180
}
2736
2181
free(direntries);
2737
2182
} else {
2738
if(ret == 0){
2739
free(direntries);
2740
}
2183
free(direntries);
2741
2184
fprintf_plus(stderr, "Could not find a network interface\n");
2742
2185
exitcode = EXIT_FAILURE;
2743
2186
goto end;
2766
2209
break;
2767
2210
}
2768
2211
bool interface_was_up = interface_is_up(interface);
2769
errno = bring_up_interface(interface, delay);
2212
ret = bring_up_interface(interface, delay);
2770
2213
if(not interface_was_up){
2771
if(errno != 0){
2772
fprintf_plus(stderr, "Failed to bring up interface \"%s\":"
2773
" %s\n", interface, strerror(errno));
2214
if(ret != 0){
2215
errno = ret;
2216
perror_plus("Failed to bring up interface");
2774
2217
} else {
2775
errno = argz_add(&interfaces_to_take_down,
2776
&interfaces_to_take_down_size,
2777
interface);
2778
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;
2779
2223
perror_plus("argz_add");
2780
2224
}
2781
2225
}
2799
2243
goto end;
2800
2244
}
2801
2245
2802
ret = init_gnutls_global(pubkey, seckey, dh_params_file, &mc);
2246
ret = init_gnutls_global(pubkey, seckey, &mc);
2803
2247
if(ret == -1){
2804
2248
fprintf_plus(stderr, "init_gnutls_global failed\n");
2805
2249
exitcode = EX_UNAVAILABLE;
2812
2256
goto end;
2813
2257
}
2814
2258
2815
/* Try /run/tmp before /tmp */
2816
tempdir = mkdtemp(run_tempdir);
2817
if(tempdir == NULL and errno == ENOENT){
2818
if(debug){
2819
fprintf_plus(stderr, "Tempdir %s did not work, trying %s\n",
2820
run_tempdir, old_tempdir);
2821
}
2822
tempdir = mkdtemp(old_tempdir);
2823
}
2824
if(tempdir == NULL){
2259
if(mkdtemp(tempdir) == NULL){
2825
2260
perror_plus("mkdtemp");
2826
2261
goto end;
2827
2262
}
2263
tempdir_created = true;
2828
2264
2829
2265
if(quit_now){
2830
2266
goto end;
2905
2341
sleep((unsigned int)retry_interval);
2906
2342
}
2907
2343
2908
if(not quit_now){
2344
if (not quit_now){
2909
2345
exitcode = EXIT_SUCCESS;
2910
2346
}
2911
2347
2927
2363
2928
2364
/* Allocate a new server */
2929
2365
mc.server = avahi_server_new(avahi_simple_poll_get(simple_poll),
2930
&config, NULL, NULL, &ret);
2366
&config, NULL, NULL, &ret_errno);
2931
2367
2932
2368
/* Free the Avahi configuration data */
2933
2369
avahi_server_config_free(&config);
2936
2372
/* Check if creating the Avahi server object succeeded */
2937
2373
if(mc.server == NULL){
2938
2374
fprintf_plus(stderr, "Failed to create Avahi server: %s\n",
2939
avahi_strerror(ret));
2375
avahi_strerror(ret_errno));
2940
2376
exitcode = EX_UNAVAILABLE;
2941
2377
goto end;
2942
2378
}
2966
2402
if(debug){
2967
2403
fprintf_plus(stderr, "Starting Avahi loop search\n");
2968
2404
}
2969
2405
2970
2406
ret = avahi_loop_with_timeout(simple_poll,
2971
2407
(int)(retry_interval * 1000), &mc);
2972
2408
if(debug){
2977
2413
end:
2978
2414
2979
2415
if(debug){
2980
if(signal_received){
2981
fprintf_plus(stderr, "%s exiting due to signal %d: %s\n",
2982
argv[0], signal_received,
2983
strsignal(signal_received));
2984
} else {
2985
fprintf_plus(stderr, "%s exiting\n", argv[0]);
2986
}
2416
fprintf_plus(stderr, "%s exiting\n", argv[0]);
2987
2417
}
2988
2418
2989
2419
/* Cleanup things */
3000
2430
3001
2431
if(gnutls_initialized){
3002
2432
gnutls_certificate_free_credentials(mc.cred);
2433
gnutls_global_deinit();
3003
2434
gnutls_dh_params_deinit(mc.dh_params);
3004
2435
}
3005
2436
3013
2444
mc.current_server->prev->next = NULL;
3014
2445
while(mc.current_server != NULL){
3015
2446
server *next = mc.current_server->next;
3016
#ifdef __GNUC__
3017
#pragma GCC diagnostic push
3018
#pragma GCC diagnostic ignored "-Wcast-qual"
3019
#endif
3020
free((char *)(mc.current_server->ip));
3021
#ifdef __GNUC__
3022
#pragma GCC diagnostic pop
3023
#endif
3024
2447
free(mc.current_server);
3025
2448
mc.current_server = next;
3026
2449
}
3027
2450
}
3028
2451
3029
/* Re-raise privileges */
2452
/* Re-raise priviliges */
3030
2453
{
3031
ret = raise_privileges();
3032
if(ret != 0){
3033
errno = ret;
3034
perror_plus("Failed to raise privileges");
3035
} else {
3036
3037
/* Run network hooks */
3038
run_network_hooks("stop", interfaces_hooks != NULL ?
3039
interfaces_hooks : "", delay);
3040
3041
/* Take down the network interfaces which were brought up */
3042
{
3043
char *interface = NULL;
3044
while((interface = argz_next(interfaces_to_take_down,
3045
interfaces_to_take_down_size,
3046
interface))){
3047
ret = take_down_interface(interface);
3048
if(ret != 0){
3049
errno = ret;
3050
perror_plus("Failed to take down interface");
3051
}
3052
}
3053
if(debug and (interfaces_to_take_down == NULL)){
3054
fprintf_plus(stderr, "No interfaces needed to be taken"
3055
" down\n");
3056
}
3057
}
3058
}
3059
3060
ret = lower_privileges_permanently();
3061
if(ret != 0){
3062
errno = ret;
3063
perror_plus("Failed to lower privileges permanently");
3064
}
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();
3065
2479
}
3066
2480
3067
2481
free(interfaces_to_take_down);
3068
2482
free(interfaces_hooks);
3069
2483
3070
void clean_dir_at(int base, const char * const dirname,
3071
uintmax_t level){
2484
/* Removes the GPGME temp directory and all files inside */
2485
if(tempdir_created){
3072
2486
struct dirent **direntries = NULL;
3073
int dret;
3074
int dir_fd = (int)TEMP_FAILURE_RETRY(openat(base, dirname,
3075
O_RDONLY
3076
| O_NOFOLLOW
3077
| O_DIRECTORY
3078
| O_PATH));
3079
if(dir_fd == -1){
3080
perror_plus("open");
3081
return;
3082
}
3083
int numentries = scandirat(dir_fd, ".", &direntries,
3084
notdotentries, alphasort);
3085
if(numentries >= 0){
2487
struct dirent *direntry = NULL;
2488
int numentries = scandir(tempdir, &direntries, notdotentries,
2489
alphasort);
2490
if (numentries > 0){
3086
2491
for(int i = 0; i < numentries; i++){
3087
if(debug){
3088
fprintf_plus(stderr, "Unlinking \"%s/%s\"\n",
3089
dirname, direntries[i]->d_name);
3090
}
3091
dret = unlinkat(dir_fd, direntries[i]->d_name, 0);
3092
if(dret == -1){
3093
if(errno == EISDIR){
3094
dret = unlinkat(dir_fd, direntries[i]->d_name,
3095
AT_REMOVEDIR);
3096
}
3097
if((dret == -1) and (errno == ENOTEMPTY)
3098
and (strcmp(direntries[i]->d_name, "private-keys-v1.d")
3099
== 0) and (level == 0)){
3100
/* Recurse only in this special case */
3101
clean_dir_at(dir_fd, direntries[i]->d_name, level+1);
3102
dret = 0;
3103
}
3104
if((dret == -1) and (errno != ENOENT)){
3105
fprintf_plus(stderr, "unlink(\"%s/%s\"): %s\n", dirname,
3106
direntries[i]->d_name, strerror(errno));
3107
}
3108
}
3109
free(direntries[i]);
3110
}
3111
3112
/* need to clean even if 0 because man page doesn't specify */
3113
free(direntries);
3114
dret = unlinkat(base, dirname, AT_REMOVEDIR);
3115
if(dret == -1 and errno != ENOENT){
3116
perror_plus("rmdir");
3117
}
3118
} else {
3119
perror_plus("scandirat");
3120
}
3121
close(dir_fd);
3122
}
3123
3124
/* Removes the GPGME temp directory and all files inside */
3125
if(tempdir != NULL){
3126
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
}
3127
2518
}
3128
2519
3129
2520
if(quit_now){
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0