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- Committer: Teddy Hogeborn
- Date: 2017-02-23 19:11:11 UTC
- Revision ID: teddy@recompile.se-20170223191111-poodzw0cr26utaz0
Update copyright year to 2017
* DBUS-API: Update copyright year to 2017.
* debian/copyright: - '' -
* intro.xml: - '' -
* mandos: - '' -
* mandos-clients.conf.xml: - '' -
* mandos-ctl: - '' -
* mandos-ctl.xml: - '' -
* mandos-keygen: - '' -
* mandos-keygen.xml: - '' -
* mandos-monitor: - '' -
* mandos-monitor.xml: - '' -
* mandos.conf.xml: - '' -
* mandos.xml: - '' -
* plugin-helpers/mandos-client-iprouteadddel.c: - '' -
* plugin-runner.c: - '' -
* plugin-runner.xml: - '' -
* plugins.d/askpass-fifo.c: - '' -
* plugins.d/askpass-fifo.xml: - '' -
* plugins.d/mandos-client.c: - '' -
* plugins.d/mandos-client.xml: - '' -
* plugins.d/password-prompt.c: - '' -
* plugins.d/password-prompt.xml: - '' -
* plugins.d/plymouth.c: - '' -
* plugins.d/plymouth.xml: - '' -
* plugins.d/splashy.c: - '' -
* plugins.d/splashy.xml: - '' -
* plugins.d/usplash.c: - '' -
* plugins.d/usplash.xml: - '' -
* DBUS-API: Update copyright year to 2017.
* debian/copyright: - '' -
* intro.xml: - '' -
* mandos: - '' -
* mandos-clients.conf.xml: - '' -
* mandos-ctl: - '' -
* mandos-ctl.xml: - '' -
* mandos-keygen: - '' -
* mandos-keygen.xml: - '' -
* mandos-monitor: - '' -
* mandos-monitor.xml: - '' -
* mandos.conf.xml: - '' -
* mandos.xml: - '' -
* plugin-helpers/mandos-client-iprouteadddel.c: - '' -
* plugin-runner.c: - '' -
* plugin-runner.xml: - '' -
* plugins.d/askpass-fifo.c: - '' -
* plugins.d/askpass-fifo.xml: - '' -
* plugins.d/mandos-client.c: - '' -
* plugins.d/mandos-client.xml: - '' -
* plugins.d/password-prompt.c: - '' -
* plugins.d/password-prompt.xml: - '' -
* plugins.d/plymouth.c: - '' -
* plugins.d/plymouth.xml: - '' -
* plugins.d/splashy.c: - '' -
* plugins.d/splashy.xml: - '' -
* plugins.d/usplash.c: - '' -
* plugins.d/usplash.xml: - '' -
added
removed
plugins.d/mandos-client.c
9
9
* "browse_callback", and parts of "main".
10
10
*
11
11
* Everything else is
12
* Copyright © 2008-2014 Teddy Hogeborn
13
* Copyright © 2008-2014 Björn Påhlsson
12
* Copyright © 2008-2017 Teddy Hogeborn
13
* Copyright © 2008-2017 Björn Påhlsson
14
14
*
15
15
* This program is free software: you can redistribute it and/or
16
16
* modify it under the terms of the GNU General Public License as
46
46
#include <stdlib.h> /* free(), EXIT_SUCCESS, srand(),
47
47
strtof(), abort() */
48
48
#include <stdbool.h> /* bool, false, true */
49
#include <string.h> /* memset(), strcmp(), strlen(),
50
strerror(), asprintf(), strcpy() */
49
#include <string.h> /* strcmp(), strlen(), strerror(),
50
asprintf(), strncpy(), strsignal()
51
*/
51
52
#include <sys/ioctl.h> /* ioctl */
52
53
#include <sys/types.h> /* socket(), inet_pton(), sockaddr,
53
54
sockaddr_in6, PF_INET6,
57
58
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
58
59
inet_pton(), connect(),
59
60
getnameinfo() */
60
#include <fcntl.h> /* open(), unlinkat() */
61
#include <fcntl.h> /* open(), unlinkat(), AT_REMOVEDIR */
61
62
#include <dirent.h> /* opendir(), struct dirent, readdir()
62
63
*/
63
64
#include <inttypes.h> /* PRIu16, PRIdMAX, intmax_t,
64
65
strtoimax() */
65
#include <errno.h> /* perror(), errno,
66
#include <errno.h> /* perror(), errno, EINTR, EINVAL,
67
EAI_SYSTEM, ENETUNREACH,
68
EHOSTUNREACH, ECONNREFUSED, EPROTO,
69
EIO, ENOENT, ENXIO, ENOMEM, EISDIR,
70
ENOTEMPTY,
66
71
program_invocation_short_name */
67
72
#include <time.h> /* nanosleep(), time(), sleep() */
68
73
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
240
245
ret = clock_gettime(CLOCK_MONOTONIC, &(new_server->last_seen));
241
246
if(ret == -1){
242
247
perror_plus("clock_gettime");
243
free(new_server->ip);
248
#ifdef __GNUC__
249
#pragma GCC diagnostic push
250
#pragma GCC diagnostic ignored "-Wcast-qual"
251
#endif
252
free((char *)(new_server->ip));
253
#ifdef __GNUC__
254
#pragma GCC diagnostic pop
255
#endif
244
256
free(new_server);
245
257
return false;
246
258
}
298
310
return false;
299
311
}
300
312
301
ret = (int)TEMP_FAILURE_RETRY(close(fd));
313
ret = close(fd);
302
314
if(ret == -1){
303
315
perror_plus("close");
304
316
}
486
498
return plaintext_length;
487
499
}
488
500
501
__attribute__((warn_unused_result, const))
502
static const char *safe_string(const char *str){
503
if(str == NULL)
504
return "(unknown)";
505
return str;
506
}
507
489
508
__attribute__((warn_unused_result))
490
509
static const char *safer_gnutls_strerror(int value){
491
510
const char *ret = gnutls_strerror(value);
492
if(ret == NULL)
493
ret = "(unknown)";
494
return ret;
511
return safe_string(ret);
495
512
}
496
513
497
514
/* GnuTLS log function callback */
501
518
fprintf_plus(stderr, "GnuTLS: %s", string);
502
519
}
503
520
504
__attribute__((nonnull, warn_unused_result))
521
__attribute__((nonnull(1, 2, 4), warn_unused_result))
505
522
static int init_gnutls_global(const char *pubkeyfilename,
506
523
const char *seckeyfilename,
524
const char *dhparamsfilename,
507
525
mandos_context *mc){
508
526
int ret;
527
unsigned int uret;
509
528
510
529
if(debug){
511
530
fprintf_plus(stderr, "Initializing GnuTLS\n");
512
531
}
513
532
514
ret = gnutls_global_init();
515
if(ret != GNUTLS_E_SUCCESS){
516
fprintf_plus(stderr, "GnuTLS global_init: %s\n",
517
safer_gnutls_strerror(ret));
518
return -1;
519
}
520
521
533
if(debug){
522
534
/* "Use a log level over 10 to enable all debugging options."
523
535
* - GnuTLS manual
531
543
if(ret != GNUTLS_E_SUCCESS){
532
544
fprintf_plus(stderr, "GnuTLS memory error: %s\n",
533
545
safer_gnutls_strerror(ret));
534
gnutls_global_deinit();
535
546
return -1;
536
547
}
537
548
562
573
safer_gnutls_strerror(ret));
563
574
goto globalfail;
564
575
}
565
ret = gnutls_dh_params_generate2(mc->dh_params, mc->dh_bits);
566
if(ret != GNUTLS_E_SUCCESS){
567
fprintf_plus(stderr, "Error in GnuTLS prime generation: %s\n",
568
safer_gnutls_strerror(ret));
569
goto globalfail;
570
}
571
576
/* If a Diffie-Hellman parameters file was given, try to use it */
577
if(dhparamsfilename != NULL){
578
gnutls_datum_t params = { .data = NULL, .size = 0 };
579
do {
580
int dhpfile = open(dhparamsfilename, O_RDONLY);
581
if(dhpfile == -1){
582
perror_plus("open");
583
dhparamsfilename = NULL;
584
break;
585
}
586
size_t params_capacity = 0;
587
while(true){
588
params_capacity = incbuffer((char **)¶ms.data,
589
(size_t)params.size,
590
(size_t)params_capacity);
591
if(params_capacity == 0){
592
perror_plus("incbuffer");
593
free(params.data);
594
params.data = NULL;
595
dhparamsfilename = NULL;
596
break;
597
}
598
ssize_t bytes_read = read(dhpfile,
599
params.data + params.size,
600
BUFFER_SIZE);
601
/* EOF */
602
if(bytes_read == 0){
603
break;
604
}
605
/* check bytes_read for failure */
606
if(bytes_read < 0){
607
perror_plus("read");
608
free(params.data);
609
params.data = NULL;
610
dhparamsfilename = NULL;
611
break;
612
}
613
params.size += (unsigned int)bytes_read;
614
}
615
if(params.data == NULL){
616
dhparamsfilename = NULL;
617
}
618
if(dhparamsfilename == NULL){
619
break;
620
}
621
ret = gnutls_dh_params_import_pkcs3(mc->dh_params, ¶ms,
622
GNUTLS_X509_FMT_PEM);
623
if(ret != GNUTLS_E_SUCCESS){
624
fprintf_plus(stderr, "Failed to parse DH parameters in file"
625
" \"%s\": %s\n", dhparamsfilename,
626
safer_gnutls_strerror(ret));
627
dhparamsfilename = NULL;
628
}
629
free(params.data);
630
} while(false);
631
}
632
if(dhparamsfilename == NULL){
633
if(mc->dh_bits == 0){
634
/* Find out the optimal number of DH bits */
635
/* Try to read the private key file */
636
gnutls_datum_t buffer = { .data = NULL, .size = 0 };
637
do {
638
int secfile = open(seckeyfilename, O_RDONLY);
639
if(secfile == -1){
640
perror_plus("open");
641
break;
642
}
643
size_t buffer_capacity = 0;
644
while(true){
645
buffer_capacity = incbuffer((char **)&buffer.data,
646
(size_t)buffer.size,
647
(size_t)buffer_capacity);
648
if(buffer_capacity == 0){
649
perror_plus("incbuffer");
650
free(buffer.data);
651
buffer.data = NULL;
652
break;
653
}
654
ssize_t bytes_read = read(secfile,
655
buffer.data + buffer.size,
656
BUFFER_SIZE);
657
/* EOF */
658
if(bytes_read == 0){
659
break;
660
}
661
/* check bytes_read for failure */
662
if(bytes_read < 0){
663
perror_plus("read");
664
free(buffer.data);
665
buffer.data = NULL;
666
break;
667
}
668
buffer.size += (unsigned int)bytes_read;
669
}
670
close(secfile);
671
} while(false);
672
/* If successful, use buffer to parse private key */
673
gnutls_sec_param_t sec_param = GNUTLS_SEC_PARAM_ULTRA;
674
if(buffer.data != NULL){
675
{
676
gnutls_openpgp_privkey_t privkey = NULL;
677
ret = gnutls_openpgp_privkey_init(&privkey);
678
if(ret != GNUTLS_E_SUCCESS){
679
fprintf_plus(stderr, "Error initializing OpenPGP key"
680
" structure: %s",
681
safer_gnutls_strerror(ret));
682
free(buffer.data);
683
buffer.data = NULL;
684
} else {
685
ret = gnutls_openpgp_privkey_import
686
(privkey, &buffer, GNUTLS_OPENPGP_FMT_BASE64, "", 0);
687
if(ret != GNUTLS_E_SUCCESS){
688
fprintf_plus(stderr, "Error importing OpenPGP key : %s",
689
safer_gnutls_strerror(ret));
690
privkey = NULL;
691
}
692
free(buffer.data);
693
buffer.data = NULL;
694
if(privkey != NULL){
695
/* Use private key to suggest an appropriate
696
sec_param */
697
sec_param = gnutls_openpgp_privkey_sec_param(privkey);
698
gnutls_openpgp_privkey_deinit(privkey);
699
if(debug){
700
fprintf_plus(stderr, "This OpenPGP key implies using"
701
" a GnuTLS security parameter \"%s\".\n",
702
safe_string(gnutls_sec_param_get_name
703
(sec_param)));
704
}
705
}
706
}
707
}
708
if(sec_param == GNUTLS_SEC_PARAM_UNKNOWN){
709
/* Err on the side of caution */
710
sec_param = GNUTLS_SEC_PARAM_ULTRA;
711
if(debug){
712
fprintf_plus(stderr, "Falling back to security parameter"
713
" \"%s\"\n",
714
safe_string(gnutls_sec_param_get_name
715
(sec_param)));
716
}
717
}
718
}
719
uret = gnutls_sec_param_to_pk_bits(GNUTLS_PK_DH, sec_param);
720
if(uret != 0){
721
mc->dh_bits = uret;
722
if(debug){
723
fprintf_plus(stderr, "A \"%s\" GnuTLS security parameter"
724
" implies %u DH bits; using that.\n",
725
safe_string(gnutls_sec_param_get_name
726
(sec_param)),
727
mc->dh_bits);
728
}
729
} else {
730
fprintf_plus(stderr, "Failed to get implied number of DH"
731
" bits for security parameter \"%s\"): %s\n",
732
safe_string(gnutls_sec_param_get_name
733
(sec_param)),
734
safer_gnutls_strerror(ret));
735
goto globalfail;
736
}
737
} else if(debug){
738
fprintf_plus(stderr, "DH bits explicitly set to %u\n",
739
mc->dh_bits);
740
}
741
ret = gnutls_dh_params_generate2(mc->dh_params, mc->dh_bits);
742
if(ret != GNUTLS_E_SUCCESS){
743
fprintf_plus(stderr, "Error in GnuTLS prime generation (%u"
744
" bits): %s\n", mc->dh_bits,
745
safer_gnutls_strerror(ret));
746
goto globalfail;
747
}
748
}
572
749
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
573
750
574
751
return 0;
576
753
globalfail:
577
754
578
755
gnutls_certificate_free_credentials(mc->cred);
579
gnutls_global_deinit();
580
756
gnutls_dh_params_deinit(mc->dh_params);
581
757
return -1;
582
758
}
634
810
/* ignore client certificate if any. */
635
811
gnutls_certificate_server_set_request(*session, GNUTLS_CERT_IGNORE);
636
812
637
gnutls_dh_set_prime_bits(*session, mc->dh_bits);
638
639
813
return 0;
640
814
}
641
815
643
817
static void empty_log(__attribute__((unused)) AvahiLogLevel level,
644
818
__attribute__((unused)) const char *txt){}
645
819
820
/* Set effective uid to 0, return errno */
821
__attribute__((warn_unused_result))
822
int raise_privileges(void){
823
int old_errno = errno;
824
int ret = 0;
825
if(seteuid(0) == -1){
826
ret = errno;
827
}
828
errno = old_errno;
829
return ret;
830
}
831
832
/* Set effective and real user ID to 0. Return errno. */
833
__attribute__((warn_unused_result))
834
int raise_privileges_permanently(void){
835
int old_errno = errno;
836
int ret = raise_privileges();
837
if(ret != 0){
838
errno = old_errno;
839
return ret;
840
}
841
if(setuid(0) == -1){
842
ret = errno;
843
}
844
errno = old_errno;
845
return ret;
846
}
847
848
/* Set effective user ID to unprivileged saved user ID */
849
__attribute__((warn_unused_result))
850
int lower_privileges(void){
851
int old_errno = errno;
852
int ret = 0;
853
if(seteuid(uid) == -1){
854
ret = errno;
855
}
856
errno = old_errno;
857
return ret;
858
}
859
860
/* Lower privileges permanently */
861
__attribute__((warn_unused_result))
862
int lower_privileges_permanently(void){
863
int old_errno = errno;
864
int ret = 0;
865
if(setuid(uid) == -1){
866
ret = errno;
867
}
868
errno = old_errno;
869
return ret;
870
}
871
872
/* Helper function to add_local_route() and delete_local_route() */
873
__attribute__((nonnull, warn_unused_result))
874
static bool add_delete_local_route(const bool add,
875
const char *address,
876
AvahiIfIndex if_index){
877
int ret;
878
char helper[] = "mandos-client-iprouteadddel";
879
char add_arg[] = "add";
880
char delete_arg[] = "delete";
881
char debug_flag[] = "--debug";
882
char *pluginhelperdir = getenv("MANDOSPLUGINHELPERDIR");
883
if(pluginhelperdir == NULL){
884
if(debug){
885
fprintf_plus(stderr, "MANDOSPLUGINHELPERDIR environment"
886
" variable not set; cannot run helper\n");
887
}
888
return false;
889
}
890
891
char interface[IF_NAMESIZE];
892
if(if_indextoname((unsigned int)if_index, interface) == NULL){
893
perror_plus("if_indextoname");
894
return false;
895
}
896
897
int devnull = (int)TEMP_FAILURE_RETRY(open("/dev/null", O_RDONLY));
898
if(devnull == -1){
899
perror_plus("open(\"/dev/null\", O_RDONLY)");
900
return false;
901
}
902
pid_t pid = fork();
903
if(pid == 0){
904
/* Child */
905
/* Raise privileges */
906
errno = raise_privileges_permanently();
907
if(errno != 0){
908
perror_plus("Failed to raise privileges");
909
/* _exit(EX_NOPERM); */
910
} else {
911
/* Set group */
912
errno = 0;
913
ret = setgid(0);
914
if(ret == -1){
915
perror_plus("setgid");
916
_exit(EX_NOPERM);
917
}
918
/* Reset supplementary groups */
919
errno = 0;
920
ret = setgroups(0, NULL);
921
if(ret == -1){
922
perror_plus("setgroups");
923
_exit(EX_NOPERM);
924
}
925
}
926
ret = dup2(devnull, STDIN_FILENO);
927
if(ret == -1){
928
perror_plus("dup2(devnull, STDIN_FILENO)");
929
_exit(EX_OSERR);
930
}
931
ret = close(devnull);
932
if(ret == -1){
933
perror_plus("close");
934
_exit(EX_OSERR);
935
}
936
ret = dup2(STDERR_FILENO, STDOUT_FILENO);
937
if(ret == -1){
938
perror_plus("dup2(STDERR_FILENO, STDOUT_FILENO)");
939
_exit(EX_OSERR);
940
}
941
int helperdir_fd = (int)TEMP_FAILURE_RETRY(open(pluginhelperdir,
942
O_RDONLY
943
| O_DIRECTORY
944
| O_PATH
945
| O_CLOEXEC));
946
if(helperdir_fd == -1){
947
perror_plus("open");
948
_exit(EX_UNAVAILABLE);
949
}
950
int helper_fd = (int)TEMP_FAILURE_RETRY(openat(helperdir_fd,
951
helper, O_RDONLY));
952
if(helper_fd == -1){
953
perror_plus("openat");
954
close(helperdir_fd);
955
_exit(EX_UNAVAILABLE);
956
}
957
close(helperdir_fd);
958
#ifdef __GNUC__
959
#pragma GCC diagnostic push
960
#pragma GCC diagnostic ignored "-Wcast-qual"
961
#endif
962
if(fexecve(helper_fd, (char *const [])
963
{ helper, add ? add_arg : delete_arg, (char *)address,
964
interface, debug ? debug_flag : NULL, NULL },
965
environ) == -1){
966
#ifdef __GNUC__
967
#pragma GCC diagnostic pop
968
#endif
969
perror_plus("fexecve");
970
_exit(EXIT_FAILURE);
971
}
972
}
973
if(pid == -1){
974
perror_plus("fork");
975
return false;
976
}
977
int status;
978
pid_t pret = -1;
979
errno = 0;
980
do {
981
pret = waitpid(pid, &status, 0);
982
if(pret == -1 and errno == EINTR and quit_now){
983
int errno_raising = 0;
984
if((errno = raise_privileges()) != 0){
985
errno_raising = errno;
986
perror_plus("Failed to raise privileges in order to"
987
" kill helper program");
988
}
989
if(kill(pid, SIGTERM) == -1){
990
perror_plus("kill");
991
}
992
if((errno_raising == 0) and (errno = lower_privileges()) != 0){
993
perror_plus("Failed to lower privileges after killing"
994
" helper program");
995
}
996
return false;
997
}
998
} while(pret == -1 and errno == EINTR);
999
if(pret == -1){
1000
perror_plus("waitpid");
1001
return false;
1002
}
1003
if(WIFEXITED(status)){
1004
if(WEXITSTATUS(status) != 0){
1005
fprintf_plus(stderr, "Error: iprouteadddel exited"
1006
" with status %d\n", WEXITSTATUS(status));
1007
return false;
1008
}
1009
return true;
1010
}
1011
if(WIFSIGNALED(status)){
1012
fprintf_plus(stderr, "Error: iprouteadddel died by"
1013
" signal %d\n", WTERMSIG(status));
1014
return false;
1015
}
1016
fprintf_plus(stderr, "Error: iprouteadddel crashed\n");
1017
return false;
1018
}
1019
1020
__attribute__((nonnull, warn_unused_result))
1021
static bool add_local_route(const char *address,
1022
AvahiIfIndex if_index){
1023
if(debug){
1024
fprintf_plus(stderr, "Adding route to %s\n", address);
1025
}
1026
return add_delete_local_route(true, address, if_index);
1027
}
1028
1029
__attribute__((nonnull, warn_unused_result))
1030
static bool delete_local_route(const char *address,
1031
AvahiIfIndex if_index){
1032
if(debug){
1033
fprintf_plus(stderr, "Removing route to %s\n", address);
1034
}
1035
return add_delete_local_route(false, address, if_index);
1036
}
1037
646
1038
/* Called when a Mandos server is found */
647
1039
__attribute__((nonnull, warn_unused_result))
648
1040
static int start_mandos_communication(const char *ip, in_port_t port,
659
1051
int retval = -1;
660
1052
gnutls_session_t session;
661
1053
int pf; /* Protocol family */
1054
bool route_added = false;
662
1055
663
1056
errno = 0;
664
1057
686
1079
bool match = false;
687
1080
{
688
1081
char *interface = NULL;
689
while((interface=argz_next(mc->interfaces, mc->interfaces_size,
690
interface))){
1082
while((interface = argz_next(mc->interfaces,
1083
mc->interfaces_size,
1084
interface))){
691
1085
if(if_nametoindex(interface) == (unsigned int)if_index){
692
1086
match = true;
693
1087
break;
722
1116
PRIuMAX "\n", ip, (uintmax_t)port);
723
1117
}
724
1118
725
tcp_sd = socket(pf, SOCK_STREAM, 0);
1119
tcp_sd = socket(pf, SOCK_STREAM | SOCK_CLOEXEC, 0);
726
1120
if(tcp_sd < 0){
727
1121
int e = errno;
728
1122
perror_plus("socket");
735
1129
goto mandos_end;
736
1130
}
737
1131
738
memset(&to, 0, sizeof(to));
739
1132
if(af == AF_INET6){
740
((struct sockaddr_in6 *)&to)->sin6_family = (sa_family_t)af;
741
ret = inet_pton(af, ip, &((struct sockaddr_in6 *)&to)->sin6_addr);
1133
struct sockaddr_in6 *to6 = (struct sockaddr_in6 *)&to;
1134
*to6 = (struct sockaddr_in6){ .sin6_family = (sa_family_t)af };
1135
ret = inet_pton(af, ip, &to6->sin6_addr);
742
1136
} else { /* IPv4 */
743
((struct sockaddr_in *)&to)->sin_family = (sa_family_t)af;
744
ret = inet_pton(af, ip, &((struct sockaddr_in *)&to)->sin_addr);
1137
struct sockaddr_in *to4 = (struct sockaddr_in *)&to;
1138
*to4 = (struct sockaddr_in){ .sin_family = (sa_family_t)af };
1139
ret = inet_pton(af, ip, &to4->sin_addr);
745
1140
}
746
1141
if(ret < 0 ){
747
1142
int e = errno;
817
1212
goto mandos_end;
818
1213
}
819
1214
820
if(af == AF_INET6){
821
ret = connect(tcp_sd, (struct sockaddr *)&to,
822
sizeof(struct sockaddr_in6));
823
} else {
824
ret = connect(tcp_sd, (struct sockaddr *)&to, /* IPv4 */
825
sizeof(struct sockaddr_in));
826
}
827
if(ret < 0){
828
if((errno != ECONNREFUSED and errno != ENETUNREACH) or debug){
829
int e = errno;
830
perror_plus("connect");
831
errno = e;
832
}
833
goto mandos_end;
834
}
835
836
if(quit_now){
837
errno = EINTR;
838
goto mandos_end;
1215
while(true){
1216
if(af == AF_INET6){
1217
ret = connect(tcp_sd, (struct sockaddr *)&to,
1218
sizeof(struct sockaddr_in6));
1219
} else {
1220
ret = connect(tcp_sd, (struct sockaddr *)&to, /* IPv4 */
1221
sizeof(struct sockaddr_in));
1222
}
1223
if(ret < 0){
1224
if(((errno == ENETUNREACH) or (errno == EHOSTUNREACH))
1225
and if_index != AVAHI_IF_UNSPEC
1226
and connect_to == NULL
1227
and not route_added and
1228
((af == AF_INET6 and not
1229
IN6_IS_ADDR_LINKLOCAL(&(((struct sockaddr_in6 *)
1230
&to)->sin6_addr)))
1231
or (af == AF_INET and
1232
/* Not a a IPv4LL address */
1233
(ntohl(((struct sockaddr_in *)&to)->sin_addr.s_addr)
1234
& 0xFFFF0000L) != 0xA9FE0000L))){
1235
/* Work around Avahi bug - Avahi does not announce link-local
1236
addresses if it has a global address, so local hosts with
1237
*only* a link-local address (e.g. Mandos clients) cannot
1238
connect to a Mandos server announced by Avahi on a server
1239
host with a global address. Work around this by retrying
1240
with an explicit route added with the server's address.
1241
1242
Avahi bug reference:
1243
https://lists.freedesktop.org/archives/avahi/2010-February/001833.html
1244
https://bugs.debian.org/587961
1245
*/
1246
if(debug){
1247
fprintf_plus(stderr, "Mandos server unreachable, trying"
1248
" direct route\n");
1249
}
1250
int e = errno;
1251
route_added = add_local_route(ip, if_index);
1252
if(route_added){
1253
continue;
1254
}
1255
errno = e;
1256
}
1257
if(errno != ECONNREFUSED or debug){
1258
int e = errno;
1259
perror_plus("connect");
1260
errno = e;
1261
}
1262
goto mandos_end;
1263
}
1264
1265
if(quit_now){
1266
errno = EINTR;
1267
goto mandos_end;
1268
}
1269
break;
839
1270
}
840
1271
841
1272
const char *out = mandos_protocol_version;
995
1426
&decrypted_buffer, mc);
996
1427
if(decrypted_buffer_size >= 0){
997
1428
1429
clearerr(stdout);
998
1430
written = 0;
999
1431
while(written < (size_t) decrypted_buffer_size){
1000
1432
if(quit_now){
1016
1448
}
1017
1449
written += (size_t)ret;
1018
1450
}
1451
ret = fflush(stdout);
1452
if(ret != 0){
1453
int e = errno;
1454
if(debug){
1455
fprintf_plus(stderr, "Error writing encrypted data: %s\n",
1456
strerror(errno));
1457
}
1458
errno = e;
1459
goto mandos_end;
1460
}
1019
1461
retval = 0;
1020
1462
}
1021
1463
}
1024
1466
1025
1467
mandos_end:
1026
1468
{
1469
if(route_added){
1470
if(not delete_local_route(ip, if_index)){
1471
fprintf_plus(stderr, "Failed to delete local route to %s on"
1472
" interface %d", ip, if_index);
1473
}
1474
}
1027
1475
int e = errno;
1028
1476
free(decrypted_buffer);
1029
1477
free(buffer);
1030
1478
if(tcp_sd >= 0){
1031
ret = (int)TEMP_FAILURE_RETRY(close(tcp_sd));
1479
ret = close(tcp_sd);
1032
1480
}
1033
1481
if(ret == -1){
1034
1482
if(e == 0){
1046
1494
return retval;
1047
1495
}
1048
1496
1049
__attribute__((nonnull))
1050
1497
static void resolve_callback(AvahiSServiceResolver *r,
1051
1498
AvahiIfIndex interface,
1052
1499
AvahiProtocol proto,
1069
1516
timed out */
1070
1517
1071
1518
if(quit_now){
1519
avahi_s_service_resolver_free(r);
1072
1520
return;
1073
1521
}
1074
1522
1188
1636
__attribute__((nonnull, warn_unused_result))
1189
1637
bool get_flags(const char *ifname, struct ifreq *ifr){
1190
1638
int ret;
1191
error_t ret_errno;
1639
int old_errno;
1192
1640
1193
1641
int s = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1194
1642
if(s < 0){
1195
ret_errno = errno;
1643
old_errno = errno;
1196
1644
perror_plus("socket");
1197
errno = ret_errno;
1645
errno = old_errno;
1198
1646
return false;
1199
1647
}
1200
strcpy(ifr->ifr_name, ifname);
1648
strncpy(ifr->ifr_name, ifname, IF_NAMESIZE);
1649
ifr->ifr_name[IF_NAMESIZE-1] = '\0'; /* NUL terminate */
1201
1650
ret = ioctl(s, SIOCGIFFLAGS, ifr);
1202
1651
if(ret == -1){
1203
1652
if(debug){
1204
ret_errno = errno;
1653
old_errno = errno;
1205
1654
perror_plus("ioctl SIOCGIFFLAGS");
1206
errno = ret_errno;
1655
errno = old_errno;
1207
1656
}
1208
1657
return false;
1209
1658
}
1454
1903
}
1455
1904
}
1456
1905
1457
/* Set effective uid to 0, return errno */
1458
__attribute__((warn_unused_result))
1459
error_t raise_privileges(void){
1460
error_t old_errno = errno;
1461
error_t ret_errno = 0;
1462
if(seteuid(0) == -1){
1463
ret_errno = errno;
1464
}
1465
errno = old_errno;
1466
return ret_errno;
1467
}
1468
1469
/* Set effective and real user ID to 0. Return errno. */
1470
__attribute__((warn_unused_result))
1471
error_t raise_privileges_permanently(void){
1472
error_t old_errno = errno;
1473
error_t ret_errno = raise_privileges();
1474
if(ret_errno != 0){
1475
errno = old_errno;
1476
return ret_errno;
1477
}
1478
if(setuid(0) == -1){
1479
ret_errno = errno;
1480
}
1481
errno = old_errno;
1482
return ret_errno;
1483
}
1484
1485
/* Set effective user ID to unprivileged saved user ID */
1486
__attribute__((warn_unused_result))
1487
error_t lower_privileges(void){
1488
error_t old_errno = errno;
1489
error_t ret_errno = 0;
1490
if(seteuid(uid) == -1){
1491
ret_errno = errno;
1492
}
1493
errno = old_errno;
1494
return ret_errno;
1495
}
1496
1497
/* Lower privileges permanently */
1498
__attribute__((warn_unused_result))
1499
error_t lower_privileges_permanently(void){
1500
error_t old_errno = errno;
1501
error_t ret_errno = 0;
1502
if(setuid(uid) == -1){
1503
ret_errno = errno;
1504
}
1505
errno = old_errno;
1506
return ret_errno;
1507
}
1508
1509
1906
__attribute__((nonnull))
1510
1907
void run_network_hooks(const char *mode, const char *interface,
1511
1908
const float delay){
1512
1909
struct dirent **direntries = NULL;
1513
1910
if(hookdir_fd == -1){
1514
hookdir_fd = open(hookdir, O_RDONLY);
1911
hookdir_fd = open(hookdir, O_RDONLY | O_DIRECTORY | O_PATH
1912
| O_CLOEXEC);
1515
1913
if(hookdir_fd == -1){
1516
1914
if(errno == ENOENT){
1517
1915
if(debug){
1524
1922
return;
1525
1923
}
1526
1924
}
1527
#ifdef __GLIBC__
1528
#if __GLIBC_PREREQ(2, 15)
1529
1925
int numhooks = scandirat(hookdir_fd, ".", &direntries,
1530
1926
runnable_hook, alphasort);
1531
#else /* not __GLIBC_PREREQ(2, 15) */
1532
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1533
alphasort);
1534
#endif /* not __GLIBC_PREREQ(2, 15) */
1535
#else /* not __GLIBC__ */
1536
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1537
alphasort);
1538
#endif /* not __GLIBC__ */
1539
1927
if(numhooks == -1){
1540
1928
perror_plus("scandir");
1541
1929
return;
1542
1930
}
1543
1931
struct dirent *direntry;
1544
1932
int ret;
1545
int devnull = open("/dev/null", O_RDONLY);
1933
int devnull = (int)TEMP_FAILURE_RETRY(open("/dev/null", O_RDONLY));
1934
if(devnull == -1){
1935
perror_plus("open(\"/dev/null\", O_RDONLY)");
1936
return;
1937
}
1546
1938
for(int i = 0; i < numhooks; i++){
1547
1939
direntry = direntries[i];
1548
1940
if(debug){
1572
1964
perror_plus("setgroups");
1573
1965
_exit(EX_NOPERM);
1574
1966
}
1575
ret = dup2(devnull, STDIN_FILENO);
1576
if(ret == -1){
1577
perror_plus("dup2(devnull, STDIN_FILENO)");
1578
_exit(EX_OSERR);
1579
}
1580
ret = close(devnull);
1581
if(ret == -1){
1582
perror_plus("close");
1583
_exit(EX_OSERR);
1584
}
1585
ret = dup2(STDERR_FILENO, STDOUT_FILENO);
1586
if(ret == -1){
1587
perror_plus("dup2(STDERR_FILENO, STDOUT_FILENO)");
1588
_exit(EX_OSERR);
1589
}
1590
1967
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1591
1968
if(ret == -1){
1592
1969
perror_plus("setenv");
1627
2004
_exit(EX_OSERR);
1628
2005
}
1629
2006
}
1630
int hook_fd = openat(hookdir_fd, direntry->d_name, O_RDONLY);
2007
int hook_fd = (int)TEMP_FAILURE_RETRY(openat(hookdir_fd,
2008
direntry->d_name,
2009
O_RDONLY));
1631
2010
if(hook_fd == -1){
1632
2011
perror_plus("openat");
1633
2012
_exit(EXIT_FAILURE);
1634
2013
}
1635
if((int)TEMP_FAILURE_RETRY(close(hookdir_fd)) == -1){
2014
if(close(hookdir_fd) == -1){
1636
2015
perror_plus("close");
1637
2016
_exit(EXIT_FAILURE);
1638
2017
}
2018
ret = dup2(devnull, STDIN_FILENO);
2019
if(ret == -1){
2020
perror_plus("dup2(devnull, STDIN_FILENO)");
2021
_exit(EX_OSERR);
2022
}
2023
ret = close(devnull);
2024
if(ret == -1){
2025
perror_plus("close");
2026
_exit(EX_OSERR);
2027
}
2028
ret = dup2(STDERR_FILENO, STDOUT_FILENO);
2029
if(ret == -1){
2030
perror_plus("dup2(STDERR_FILENO, STDOUT_FILENO)");
2031
_exit(EX_OSERR);
2032
}
1639
2033
if(fexecve(hook_fd, (char *const []){ direntry->d_name, NULL },
1640
2034
environ) == -1){
1641
2035
perror_plus("fexecve");
1642
2036
_exit(EXIT_FAILURE);
1643
2037
}
1644
2038
} else {
2039
if(hook_pid == -1){
2040
perror_plus("fork");
2041
free(direntry);
2042
continue;
2043
}
1645
2044
int status;
1646
2045
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
1647
2046
perror_plus("waitpid");
2047
free(direntry);
1648
2048
continue;
1649
2049
}
1650
2050
if(WIFEXITED(status)){
1652
2052
fprintf_plus(stderr, "Warning: network hook \"%s\" exited"
1653
2053
" with status %d\n", direntry->d_name,
1654
2054
WEXITSTATUS(status));
2055
free(direntry);
1655
2056
continue;
1656
2057
}
1657
2058
} else if(WIFSIGNALED(status)){
1658
2059
fprintf_plus(stderr, "Warning: network hook \"%s\" died by"
1659
2060
" signal %d\n", direntry->d_name,
1660
2061
WTERMSIG(status));
2062
free(direntry);
1661
2063
continue;
1662
2064
} else {
1663
2065
fprintf_plus(stderr, "Warning: network hook \"%s\""
1664
2066
" crashed\n", direntry->d_name);
2067
free(direntry);
1665
2068
continue;
1666
2069
}
1667
2070
}
1669
2072
fprintf_plus(stderr, "Network hook \"%s\" ran successfully\n",
1670
2073
direntry->d_name);
1671
2074
}
2075
free(direntry);
1672
2076
}
1673
2077
free(direntries);
1674
if((int)TEMP_FAILURE_RETRY(close(hookdir_fd)) == -1){
2078
if(close(hookdir_fd) == -1){
1675
2079
perror_plus("close");
1676
2080
} else {
1677
2081
hookdir_fd = -1;
1680
2084
}
1681
2085
1682
2086
__attribute__((nonnull, warn_unused_result))
1683
error_t bring_up_interface(const char *const interface,
1684
const float delay){
1685
error_t old_errno = errno;
2087
int bring_up_interface(const char *const interface,
2088
const float delay){
2089
int old_errno = errno;
1686
2090
int ret;
1687
2091
struct ifreq network;
1688
2092
unsigned int if_index = if_nametoindex(interface);
1698
2102
}
1699
2103
1700
2104
if(not interface_is_up(interface)){
1701
error_t ret_errno = 0, ioctl_errno = 0;
2105
int ret_errno = 0;
2106
int ioctl_errno = 0;
1702
2107
if(not get_flags(interface, &network)){
1703
2108
ret_errno = errno;
1704
2109
fprintf_plus(stderr, "Failed to get flags for interface "
1717
2122
}
1718
2123
1719
2124
if(quit_now){
1720
ret = (int)TEMP_FAILURE_RETRY(close(sd));
2125
ret = close(sd);
1721
2126
if(ret == -1){
1722
2127
perror_plus("close");
1723
2128
}
1773
2178
}
1774
2179
1775
2180
/* Close the socket */
1776
ret = (int)TEMP_FAILURE_RETRY(close(sd));
2181
ret = close(sd);
1777
2182
if(ret == -1){
1778
2183
perror_plus("close");
1779
2184
}
1791
2196
1792
2197
/* Sleep checking until interface is running.
1793
2198
Check every 0.25s, up to total time of delay */
1794
for(int i=0; i < delay * 4; i++){
2199
for(int i = 0; i < delay * 4; i++){
1795
2200
if(interface_is_running(interface)){
1796
2201
break;
1797
2202
}
1807
2212
}
1808
2213
1809
2214
__attribute__((nonnull, warn_unused_result))
1810
error_t take_down_interface(const char *const interface){
1811
error_t old_errno = errno;
2215
int take_down_interface(const char *const interface){
2216
int old_errno = errno;
1812
2217
struct ifreq network;
1813
2218
unsigned int if_index = if_nametoindex(interface);
1814
2219
if(if_index == 0){
1817
2222
return ENXIO;
1818
2223
}
1819
2224
if(interface_is_up(interface)){
1820
error_t ret_errno = 0, ioctl_errno = 0;
2225
int ret_errno = 0;
2226
int ioctl_errno = 0;
1821
2227
if(not get_flags(interface, &network) and debug){
1822
2228
ret_errno = errno;
1823
2229
fprintf_plus(stderr, "Failed to get flags for interface "
1861
2267
}
1862
2268
1863
2269
/* Close the socket */
1864
int ret = (int)TEMP_FAILURE_RETRY(close(sd));
2270
int ret = close(sd);
1865
2271
if(ret == -1){
1866
2272
perror_plus("close");
1867
2273
}
1882
2288
}
1883
2289
1884
2290
int main(int argc, char *argv[]){
1885
mandos_context mc = { .server = NULL, .dh_bits = 1024,
1886
.priority = "SECURE256:!CTYPE-X.509:"
1887
"+CTYPE-OPENPGP", .current_server = NULL,
1888
.interfaces = NULL, .interfaces_size = 0 };
2291
mandos_context mc = { .server = NULL, .dh_bits = 0,
2292
.priority = "SECURE256:!CTYPE-X.509"
2293
":+CTYPE-OPENPGP:!RSA:+SIGN-DSA-SHA256",
2294
.current_server = NULL, .interfaces = NULL,
2295
.interfaces_size = 0 };
1889
2296
AvahiSServiceBrowser *sb = NULL;
1890
2297
error_t ret_errno;
1891
2298
int ret;
1900
2307
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
1901
2308
const char *seckey = PATHDIR "/" SECKEY;
1902
2309
const char *pubkey = PATHDIR "/" PUBKEY;
2310
const char *dh_params_file = NULL;
1903
2311
char *interfaces_hooks = NULL;
1904
2312
1905
2313
bool gnutls_initialized = false;
1958
2366
.doc = "Bit length of the prime number used in the"
1959
2367
" Diffie-Hellman key exchange",
1960
2368
.group = 2 },
2369
{ .name = "dh-params", .key = 134,
2370
.arg = "FILE",
2371
.doc = "PEM-encoded PKCS#3 file with pre-generated parameters"
2372
" for the Diffie-Hellman key exchange",
2373
.group = 2 },
1961
2374
{ .name = "priority", .key = 130,
1962
2375
.arg = "STRING",
1963
2376
.doc = "GnuTLS priority string for the TLS handshake",
2018
2431
}
2019
2432
mc.dh_bits = (typeof(mc.dh_bits))tmpmax;
2020
2433
break;
2434
case 134: /* --dh-params */
2435
dh_params_file = arg;
2436
break;
2021
2437
case 130: /* --priority */
2022
2438
mc.priority = arg;
2023
2439
break;
2063
2479
.args_doc = "",
2064
2480
.doc = "Mandos client -- Get and decrypt"
2065
2481
" passwords from a Mandos server" };
2066
ret = argp_parse(&argp, argc, argv,
2067
ARGP_IN_ORDER | ARGP_NO_HELP, 0, NULL);
2068
switch(ret){
2482
ret_errno = argp_parse(&argp, argc, argv,
2483
ARGP_IN_ORDER | ARGP_NO_HELP, 0, NULL);
2484
switch(ret_errno){
2069
2485
case 0:
2070
2486
break;
2071
2487
case ENOMEM:
2072
2488
default:
2073
errno = ret;
2489
errno = ret_errno;
2074
2490
perror_plus("argp_parse");
2075
2491
exitcode = EX_OSERR;
2076
2492
goto end;
2079
2495
goto end;
2080
2496
}
2081
2497
}
2082
2498
2083
2499
{
2084
2500
/* Work around Debian bug #633582:
2085
<http://bugs.debian.org/633582> */
2501
<https://bugs.debian.org/633582> */
2086
2502
2087
2503
/* Re-raise privileges */
2088
ret_errno = raise_privileges();
2089
if(ret_errno != 0){
2090
errno = ret_errno;
2504
ret = raise_privileges();
2505
if(ret != 0){
2506
errno = ret;
2091
2507
perror_plus("Failed to raise privileges");
2092
2508
} else {
2093
2509
struct stat st;
2109
2525
}
2110
2526
}
2111
2527
}
2112
TEMP_FAILURE_RETRY(close(seckey_fd));
2528
close(seckey_fd);
2113
2529
}
2114
2530
}
2115
2531
2116
2532
if(strcmp(pubkey, PATHDIR "/" PUBKEY) == 0){
2117
2533
int pubkey_fd = open(pubkey, O_RDONLY);
2118
2534
if(pubkey_fd == -1){
2130
2546
}
2131
2547
}
2132
2548
}
2133
TEMP_FAILURE_RETRY(close(pubkey_fd));
2134
}
2135
}
2136
2549
close(pubkey_fd);
2550
}
2551
}
2552
2553
if(dh_params_file != NULL
2554
and strcmp(dh_params_file, PATHDIR "/dhparams.pem" ) == 0){
2555
int dhparams_fd = open(dh_params_file, O_RDONLY);
2556
if(dhparams_fd == -1){
2557
perror_plus("open");
2558
} else {
2559
ret = (int)TEMP_FAILURE_RETRY(fstat(dhparams_fd, &st));
2560
if(ret == -1){
2561
perror_plus("fstat");
2562
} else {
2563
if(S_ISREG(st.st_mode)
2564
and st.st_uid == 0 and st.st_gid == 0){
2565
ret = fchown(dhparams_fd, uid, gid);
2566
if(ret == -1){
2567
perror_plus("fchown");
2568
}
2569
}
2570
}
2571
close(dhparams_fd);
2572
}
2573
}
2574
2137
2575
/* Lower privileges */
2138
ret_errno = lower_privileges();
2139
if(ret_errno != 0){
2140
errno = ret_errno;
2576
ret = lower_privileges();
2577
if(ret != 0){
2578
errno = ret;
2141
2579
perror_plus("Failed to lower privileges");
2142
2580
}
2143
2581
}
2268
2706
if(ret_errno != 0){
2269
2707
errno = ret_errno;
2270
2708
perror_plus("argz_add");
2709
free(direntries[i]);
2271
2710
continue;
2272
2711
}
2273
2712
if(debug){
2274
2713
fprintf_plus(stderr, "Will use interface \"%s\"\n",
2275
2714
direntries[i]->d_name);
2276
2715
}
2716
free(direntries[i]);
2277
2717
}
2278
2718
free(direntries);
2279
2719
} else {
2311
2751
errno = bring_up_interface(interface, delay);
2312
2752
if(not interface_was_up){
2313
2753
if(errno != 0){
2314
perror_plus("Failed to bring up interface");
2754
fprintf_plus(stderr, "Failed to bring up interface \"%s\":"
2755
" %s\n", interface, strerror(errno));
2315
2756
} else {
2316
2757
errno = argz_add(&interfaces_to_take_down,
2317
2758
&interfaces_to_take_down_size,
2340
2781
goto end;
2341
2782
}
2342
2783
2343
ret = init_gnutls_global(pubkey, seckey, &mc);
2784
ret = init_gnutls_global(pubkey, seckey, dh_params_file, &mc);
2344
2785
if(ret == -1){
2345
2786
fprintf_plus(stderr, "init_gnutls_global failed\n");
2346
2787
exitcode = EX_UNAVAILABLE;
2468
2909
2469
2910
/* Allocate a new server */
2470
2911
mc.server = avahi_server_new(avahi_simple_poll_get(simple_poll),
2471
&config, NULL, NULL, &ret_errno);
2912
&config, NULL, NULL, &ret);
2472
2913
2473
2914
/* Free the Avahi configuration data */
2474
2915
avahi_server_config_free(&config);
2477
2918
/* Check if creating the Avahi server object succeeded */
2478
2919
if(mc.server == NULL){
2479
2920
fprintf_plus(stderr, "Failed to create Avahi server: %s\n",
2480
avahi_strerror(ret_errno));
2921
avahi_strerror(ret));
2481
2922
exitcode = EX_UNAVAILABLE;
2482
2923
goto end;
2483
2924
}
2518
2959
end:
2519
2960
2520
2961
if(debug){
2521
fprintf_plus(stderr, "%s exiting\n", argv[0]);
2962
if(signal_received){
2963
fprintf_plus(stderr, "%s exiting due to signal %d: %s\n",
2964
argv[0], signal_received,
2965
strsignal(signal_received));
2966
} else {
2967
fprintf_plus(stderr, "%s exiting\n", argv[0]);
2968
}
2522
2969
}
2523
2970
2524
2971
/* Cleanup things */
2535
2982
2536
2983
if(gnutls_initialized){
2537
2984
gnutls_certificate_free_credentials(mc.cred);
2538
gnutls_global_deinit();
2539
2985
gnutls_dh_params_deinit(mc.dh_params);
2540
2986
}
2541
2987
2549
2995
mc.current_server->prev->next = NULL;
2550
2996
while(mc.current_server != NULL){
2551
2997
server *next = mc.current_server->next;
2998
#ifdef __GNUC__
2999
#pragma GCC diagnostic push
3000
#pragma GCC diagnostic ignored "-Wcast-qual"
3001
#endif
3002
free((char *)(mc.current_server->ip));
3003
#ifdef __GNUC__
3004
#pragma GCC diagnostic pop
3005
#endif
2552
3006
free(mc.current_server);
2553
3007
mc.current_server = next;
2554
3008
}
2556
3010
2557
3011
/* Re-raise privileges */
2558
3012
{
2559
ret_errno = raise_privileges();
2560
if(ret_errno != 0){
2561
errno = ret_errno;
3013
ret = raise_privileges();
3014
if(ret != 0){
3015
errno = ret;
2562
3016
perror_plus("Failed to raise privileges");
2563
3017
} else {
2564
3018
2569
3023
/* Take down the network interfaces which were brought up */
2570
3024
{
2571
3025
char *interface = NULL;
2572
while((interface=argz_next(interfaces_to_take_down,
2573
interfaces_to_take_down_size,
2574
interface))){
2575
ret_errno = take_down_interface(interface);
2576
if(ret_errno != 0){
2577
errno = ret_errno;
3026
while((interface = argz_next(interfaces_to_take_down,
3027
interfaces_to_take_down_size,
3028
interface))){
3029
ret = take_down_interface(interface);
3030
if(ret != 0){
3031
errno = ret;
2578
3032
perror_plus("Failed to take down interface");
2579
3033
}
2580
3034
}
2585
3039
}
2586
3040
}
2587
3041
2588
ret_errno = lower_privileges_permanently();
2589
if(ret_errno != 0){
2590
errno = ret_errno;
3042
ret = lower_privileges_permanently();
3043
if(ret != 0){
3044
errno = ret;
2591
3045
perror_plus("Failed to lower privileges permanently");
2592
3046
}
2593
3047
}
2595
3049
free(interfaces_to_take_down);
2596
3050
free(interfaces_hooks);
2597
3051
3052
void clean_dir_at(int base, const char * const dirname,
3053
uintmax_t level){
3054
struct dirent **direntries = NULL;
3055
int dret;
3056
int dir_fd = (int)TEMP_FAILURE_RETRY(openat(base, dirname,
3057
O_RDONLY
3058
| O_NOFOLLOW
3059
| O_DIRECTORY
3060
| O_PATH));
3061
if(dir_fd == -1){
3062
perror_plus("open");
3063
}
3064
int numentries = scandirat(dir_fd, ".", &direntries,
3065
notdotentries, alphasort);
3066
if(numentries >= 0){
3067
for(int i = 0; i < numentries; i++){
3068
if(debug){
3069
fprintf_plus(stderr, "Unlinking \"%s/%s\"\n",
3070
dirname, direntries[i]->d_name);
3071
}
3072
dret = unlinkat(dir_fd, direntries[i]->d_name, 0);
3073
if(dret == -1){
3074
if(errno == EISDIR){
3075
dret = unlinkat(dir_fd, direntries[i]->d_name,
3076
AT_REMOVEDIR);
3077
}
3078
if((dret == -1) and (errno == ENOTEMPTY)
3079
and (strcmp(direntries[i]->d_name, "private-keys-v1.d")
3080
== 0) and (level == 0)){
3081
/* Recurse only in this special case */
3082
clean_dir_at(dir_fd, direntries[i]->d_name, level+1);
3083
dret = 0;
3084
}
3085
if(dret == -1){
3086
fprintf_plus(stderr, "unlink(\"%s/%s\"): %s\n", dirname,
3087
direntries[i]->d_name, strerror(errno));
3088
}
3089
}
3090
free(direntries[i]);
3091
}
3092
3093
/* need to clean even if 0 because man page doesn't specify */
3094
free(direntries);
3095
if(numentries == -1){
3096
perror_plus("scandirat");
3097
}
3098
dret = unlinkat(base, dirname, AT_REMOVEDIR);
3099
if(dret == -1 and errno != ENOENT){
3100
perror_plus("rmdir");
3101
}
3102
} else {
3103
perror_plus("scandirat");
3104
}
3105
close(dir_fd);
3106
}
3107
2598
3108
/* Removes the GPGME temp directory and all files inside */
2599
3109
if(tempdir != NULL){
2600
struct dirent **direntries = NULL;
2601
int tempdir_fd = (int)TEMP_FAILURE_RETRY(open(tempdir, O_RDONLY |
2602
O_NOFOLLOW));
2603
if(tempdir_fd == -1){
2604
perror_plus("open");
2605
} else {
2606
#ifdef __GLIBC__
2607
#if __GLIBC_PREREQ(2, 15)
2608
int numentries = scandirat(tempdir_fd, ".", &direntries,
2609
notdotentries, alphasort);
2610
#else /* not __GLIBC_PREREQ(2, 15) */
2611
int numentries = scandir(tempdir, &direntries, notdotentries,
2612
alphasort);
2613
#endif /* not __GLIBC_PREREQ(2, 15) */
2614
#else /* not __GLIBC__ */
2615
int numentries = scandir(tempdir, &direntries, notdotentries,
2616
alphasort);
2617
#endif /* not __GLIBC__ */
2618
if(numentries >= 0){
2619
for(int i = 0; i < numentries; i++){
2620
ret = unlinkat(tempdir_fd, direntries[i]->d_name, 0);
2621
if(ret == -1){
2622
fprintf_plus(stderr, "unlinkat(open(\"%s\", O_RDONLY),"
2623
" \"%s\", 0): %s\n", tempdir,
2624
direntries[i]->d_name, strerror(errno));
2625
}
2626
}
2627
2628
/* need to clean even if 0 because man page doesn't specify */
2629
free(direntries);
2630
if(numentries == -1){
2631
perror_plus("scandir");
2632
}
2633
ret = rmdir(tempdir);
2634
if(ret == -1 and errno != ENOENT){
2635
perror_plus("rmdir");
2636
}
2637
}
2638
TEMP_FAILURE_RETRY(close(tempdir_fd));
2639
}
3110
clean_dir_at(-1, tempdir, 0);
2640
3111
}
2641
3112
2642
3113
if(quit_now){
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