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- Committer: Teddy Hogeborn
- Date: 2018-02-22 19:33:54 UTC
- mfrom: (237.4.98 release)
- Revision ID: teddy@recompile.se-20180222193354-uivyobeq4l5wyjt0
Merge from release branch
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
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
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
21
23
* WITHOUT ANY WARRANTY; without even the implied warranty of
22
24
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
23
25
* General Public License for more details.
24
26
*
25
27
* You should have received a copy of the GNU General Public License
26
* along with this program. If not, see
27
* <http://www.gnu.org/licenses/>.
28
* along with Mandos. If not, see <http://www.gnu.org/licenses/>.
28
29
*
29
30
* Contact the authors at <mandos@recompile.se>.
30
31
*/
46
47
#include <stdlib.h> /* free(), EXIT_SUCCESS, srand(),
47
48
strtof(), abort() */
48
49
#include <stdbool.h> /* bool, false, true */
49
#include <string.h> /* memset(), strcmp(), strlen(),
50
strerror(), asprintf(), strcpy() */
50
#include <string.h> /* strcmp(), strlen(), strerror(),
51
asprintf(), strncpy(), strsignal()
52
*/
51
53
#include <sys/ioctl.h> /* ioctl */
52
54
#include <sys/types.h> /* socket(), inet_pton(), sockaddr,
53
55
sockaddr_in6, PF_INET6,
57
59
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
58
60
inet_pton(), connect(),
59
61
getnameinfo() */
60
#include <fcntl.h> /* open(), unlinkat() */
62
#include <fcntl.h> /* open(), unlinkat(), AT_REMOVEDIR */
61
63
#include <dirent.h> /* opendir(), struct dirent, readdir()
62
64
*/
63
65
#include <inttypes.h> /* PRIu16, PRIdMAX, intmax_t,
64
66
strtoimax() */
65
#include <errno.h> /* perror(), errno,
67
#include <errno.h> /* perror(), errno, EINTR, EINVAL,
68
EAI_SYSTEM, ENETUNREACH,
69
EHOSTUNREACH, ECONNREFUSED, EPROTO,
70
EIO, ENOENT, ENXIO, ENOMEM, EISDIR,
71
ENOTEMPTY,
66
72
program_invocation_short_name */
67
73
#include <time.h> /* nanosleep(), time(), sleep() */
68
74
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
305
311
return false;
306
312
}
307
313
308
ret = (int)TEMP_FAILURE_RETRY(close(fd));
314
ret = close(fd);
309
315
if(ret == -1){
310
316
perror_plus("close");
311
317
}
513
519
fprintf_plus(stderr, "GnuTLS: %s", string);
514
520
}
515
521
516
__attribute__((nonnull, warn_unused_result))
522
__attribute__((nonnull(1, 2, 4), warn_unused_result))
517
523
static int init_gnutls_global(const char *pubkeyfilename,
518
524
const char *seckeyfilename,
525
const char *dhparamsfilename,
519
526
mandos_context *mc){
520
527
int ret;
521
528
unsigned int uret;
524
531
fprintf_plus(stderr, "Initializing GnuTLS\n");
525
532
}
526
533
527
ret = gnutls_global_init();
528
if(ret != GNUTLS_E_SUCCESS){
529
fprintf_plus(stderr, "GnuTLS global_init: %s\n",
530
safer_gnutls_strerror(ret));
531
return -1;
532
}
533
534
534
if(debug){
535
535
/* "Use a log level over 10 to enable all debugging options."
536
536
* - GnuTLS manual
544
544
if(ret != GNUTLS_E_SUCCESS){
545
545
fprintf_plus(stderr, "GnuTLS memory error: %s\n",
546
546
safer_gnutls_strerror(ret));
547
gnutls_global_deinit();
548
547
return -1;
549
548
}
550
549
575
574
safer_gnutls_strerror(ret));
576
575
goto globalfail;
577
576
}
578
if(mc->dh_bits == 0){
579
/* Find out the optimal number of DH bits */
580
/* Try to read the private key file */
581
gnutls_datum_t buffer = { .data = NULL, .size = 0 };
582
{
583
int secfile = open(seckeyfilename, O_RDONLY);
584
size_t buffer_capacity = 0;
577
/* If a Diffie-Hellman parameters file was given, try to use it */
578
if(dhparamsfilename != NULL){
579
gnutls_datum_t params = { .data = NULL, .size = 0 };
580
do {
581
int dhpfile = open(dhparamsfilename, O_RDONLY);
582
if(dhpfile == -1){
583
perror_plus("open");
584
dhparamsfilename = NULL;
585
break;
586
}
587
size_t params_capacity = 0;
585
588
while(true){
586
buffer_capacity = incbuffer((char **)&buffer.data,
587
(size_t)buffer.size,
588
(size_t)buffer_capacity);
589
if(buffer_capacity == 0){
589
params_capacity = incbuffer((char **)¶ms.data,
590
(size_t)params.size,
591
(size_t)params_capacity);
592
if(params_capacity == 0){
590
593
perror_plus("incbuffer");
591
free(buffer.data);
592
buffer.data = NULL;
594
free(params.data);
595
params.data = NULL;
596
dhparamsfilename = NULL;
593
597
break;
594
598
}
595
ssize_t bytes_read = read(secfile, buffer.data + buffer.size,
599
ssize_t bytes_read = read(dhpfile,
600
params.data + params.size,
596
601
BUFFER_SIZE);
597
602
/* EOF */
598
603
if(bytes_read == 0){
601
606
/* check bytes_read for failure */
602
607
if(bytes_read < 0){
603
608
perror_plus("read");
604
free(buffer.data);
605
buffer.data = NULL;
606
break;
607
}
608
buffer.size += (unsigned int)bytes_read;
609
}
610
close(secfile);
611
}
612
/* If successful, use buffer to parse private key */
613
gnutls_sec_param_t sec_param = GNUTLS_SEC_PARAM_ULTRA;
614
if(buffer.data != NULL){
615
{
616
gnutls_openpgp_privkey_t privkey = NULL;
617
ret = gnutls_openpgp_privkey_init(&privkey);
618
if(ret != GNUTLS_E_SUCCESS){
619
fprintf_plus(stderr, "Error initializing OpenPGP key"
620
" structure: %s", safer_gnutls_strerror(ret));
621
free(buffer.data);
622
buffer.data = NULL;
623
} else {
624
ret = gnutls_openpgp_privkey_import(privkey, &buffer,
625
GNUTLS_OPENPGP_FMT_BASE64,
626
"", 0);
609
free(params.data);
610
params.data = NULL;
611
dhparamsfilename = NULL;
612
break;
613
}
614
params.size += (unsigned int)bytes_read;
615
}
616
ret = close(dhpfile);
617
if(ret == -1){
618
perror_plus("close");
619
}
620
if(params.data == NULL){
621
dhparamsfilename = NULL;
622
}
623
if(dhparamsfilename == NULL){
624
break;
625
}
626
ret = gnutls_dh_params_import_pkcs3(mc->dh_params, ¶ms,
627
GNUTLS_X509_FMT_PEM);
628
if(ret != GNUTLS_E_SUCCESS){
629
fprintf_plus(stderr, "Failed to parse DH parameters in file"
630
" \"%s\": %s\n", dhparamsfilename,
631
safer_gnutls_strerror(ret));
632
dhparamsfilename = NULL;
633
}
634
free(params.data);
635
} while(false);
636
}
637
if(dhparamsfilename == NULL){
638
if(mc->dh_bits == 0){
639
/* Find out the optimal number of DH bits */
640
/* Try to read the private key file */
641
gnutls_datum_t buffer = { .data = NULL, .size = 0 };
642
do {
643
int secfile = open(seckeyfilename, O_RDONLY);
644
if(secfile == -1){
645
perror_plus("open");
646
break;
647
}
648
size_t buffer_capacity = 0;
649
while(true){
650
buffer_capacity = incbuffer((char **)&buffer.data,
651
(size_t)buffer.size,
652
(size_t)buffer_capacity);
653
if(buffer_capacity == 0){
654
perror_plus("incbuffer");
655
free(buffer.data);
656
buffer.data = NULL;
657
break;
658
}
659
ssize_t bytes_read = read(secfile,
660
buffer.data + buffer.size,
661
BUFFER_SIZE);
662
/* EOF */
663
if(bytes_read == 0){
664
break;
665
}
666
/* check bytes_read for failure */
667
if(bytes_read < 0){
668
perror_plus("read");
669
free(buffer.data);
670
buffer.data = NULL;
671
break;
672
}
673
buffer.size += (unsigned int)bytes_read;
674
}
675
close(secfile);
676
} while(false);
677
/* If successful, use buffer to parse private key */
678
gnutls_sec_param_t sec_param = GNUTLS_SEC_PARAM_ULTRA;
679
if(buffer.data != NULL){
680
{
681
gnutls_openpgp_privkey_t privkey = NULL;
682
ret = gnutls_openpgp_privkey_init(&privkey);
627
683
if(ret != GNUTLS_E_SUCCESS){
628
fprintf_plus(stderr, "Error importing OpenPGP key : %s",
684
fprintf_plus(stderr, "Error initializing OpenPGP key"
685
" structure: %s",
629
686
safer_gnutls_strerror(ret));
630
privkey = NULL;
687
free(buffer.data);
688
buffer.data = NULL;
689
} else {
690
ret = gnutls_openpgp_privkey_import
691
(privkey, &buffer, GNUTLS_OPENPGP_FMT_BASE64, "", 0);
692
if(ret != GNUTLS_E_SUCCESS){
693
fprintf_plus(stderr, "Error importing OpenPGP key : %s",
694
safer_gnutls_strerror(ret));
695
privkey = NULL;
696
}
697
free(buffer.data);
698
buffer.data = NULL;
699
if(privkey != NULL){
700
/* Use private key to suggest an appropriate
701
sec_param */
702
sec_param = gnutls_openpgp_privkey_sec_param(privkey);
703
gnutls_openpgp_privkey_deinit(privkey);
704
if(debug){
705
fprintf_plus(stderr, "This OpenPGP key implies using"
706
" a GnuTLS security parameter \"%s\".\n",
707
safe_string(gnutls_sec_param_get_name
708
(sec_param)));
709
}
710
}
631
711
}
632
free(buffer.data);
633
buffer.data = NULL;
634
if(privkey != NULL){
635
/* Use private key to suggest an appropriate sec_param */
636
sec_param = gnutls_openpgp_privkey_sec_param(privkey);
637
gnutls_openpgp_privkey_deinit(privkey);
638
if(debug){
639
fprintf_plus(stderr, "This OpenPGP key implies using a"
640
" GnuTLS security parameter \"%s\".\n",
641
safe_string(gnutls_sec_param_get_name
642
(sec_param)));
643
}
712
}
713
if(sec_param == GNUTLS_SEC_PARAM_UNKNOWN){
714
/* Err on the side of caution */
715
sec_param = GNUTLS_SEC_PARAM_ULTRA;
716
if(debug){
717
fprintf_plus(stderr, "Falling back to security parameter"
718
" \"%s\"\n",
719
safe_string(gnutls_sec_param_get_name
720
(sec_param)));
644
721
}
645
722
}
646
723
}
647
if(sec_param == GNUTLS_SEC_PARAM_UNKNOWN){
648
/* Err on the side of caution */
649
sec_param = GNUTLS_SEC_PARAM_ULTRA;
724
uret = gnutls_sec_param_to_pk_bits(GNUTLS_PK_DH, sec_param);
725
if(uret != 0){
726
mc->dh_bits = uret;
650
727
if(debug){
651
fprintf_plus(stderr, "Falling back to security parameter"
652
" \"%s\"\n",
728
fprintf_plus(stderr, "A \"%s\" GnuTLS security parameter"
729
" implies %u DH bits; using that.\n",
653
730
safe_string(gnutls_sec_param_get_name
654
(sec_param)));
731
(sec_param)),
732
mc->dh_bits);
655
733
}
656
}
657
}
658
uret = gnutls_sec_param_to_pk_bits(GNUTLS_PK_DH, sec_param);
659
if(uret != 0){
660
mc->dh_bits = uret;
661
if(debug){
662
fprintf_plus(stderr, "A \"%s\" GnuTLS security parameter"
663
" implies %u DH bits; using that.\n",
734
} else {
735
fprintf_plus(stderr, "Failed to get implied number of DH"
736
" bits for security parameter \"%s\"): %s\n",
664
737
safe_string(gnutls_sec_param_get_name
665
738
(sec_param)),
666
mc->dh_bits);
739
safer_gnutls_strerror(ret));
740
goto globalfail;
667
741
}
668
} else {
669
fprintf_plus(stderr, "Failed to get implied number of DH"
670
" bits for security parameter \"%s\"): %s\n",
671
safe_string(gnutls_sec_param_get_name(sec_param)),
742
} else if(debug){
743
fprintf_plus(stderr, "DH bits explicitly set to %u\n",
744
mc->dh_bits);
745
}
746
ret = gnutls_dh_params_generate2(mc->dh_params, mc->dh_bits);
747
if(ret != GNUTLS_E_SUCCESS){
748
fprintf_plus(stderr, "Error in GnuTLS prime generation (%u"
749
" bits): %s\n", mc->dh_bits,
672
750
safer_gnutls_strerror(ret));
673
751
goto globalfail;
674
752
}
675
} else if(debug){
676
fprintf_plus(stderr, "DH bits explicitly set to %u\n",
677
mc->dh_bits);
678
}
679
ret = gnutls_dh_params_generate2(mc->dh_params, mc->dh_bits);
680
if(ret != GNUTLS_E_SUCCESS){
681
fprintf_plus(stderr, "Error in GnuTLS prime generation (%u bits):"
682
" %s\n", mc->dh_bits, safer_gnutls_strerror(ret));
683
goto globalfail;
684
}
685
753
}
686
754
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
687
755
688
756
return 0;
690
758
globalfail:
691
759
692
760
gnutls_certificate_free_credentials(mc->cred);
693
gnutls_global_deinit();
694
761
gnutls_dh_params_deinit(mc->dh_params);
695
762
return -1;
696
763
}
748
815
/* ignore client certificate if any. */
749
816
gnutls_certificate_server_set_request(*session, GNUTLS_CERT_IGNORE);
750
817
751
gnutls_dh_set_prime_bits(*session, mc->dh_bits);
752
753
818
return 0;
754
819
}
755
820
757
822
static void empty_log(__attribute__((unused)) AvahiLogLevel level,
758
823
__attribute__((unused)) const char *txt){}
759
824
825
/* Set effective uid to 0, return errno */
826
__attribute__((warn_unused_result))
827
int raise_privileges(void){
828
int old_errno = errno;
829
int ret = 0;
830
if(seteuid(0) == -1){
831
ret = errno;
832
}
833
errno = old_errno;
834
return ret;
835
}
836
837
/* Set effective and real user ID to 0. Return errno. */
838
__attribute__((warn_unused_result))
839
int raise_privileges_permanently(void){
840
int old_errno = errno;
841
int ret = raise_privileges();
842
if(ret != 0){
843
errno = old_errno;
844
return ret;
845
}
846
if(setuid(0) == -1){
847
ret = errno;
848
}
849
errno = old_errno;
850
return ret;
851
}
852
853
/* Set effective user ID to unprivileged saved user ID */
854
__attribute__((warn_unused_result))
855
int lower_privileges(void){
856
int old_errno = errno;
857
int ret = 0;
858
if(seteuid(uid) == -1){
859
ret = errno;
860
}
861
errno = old_errno;
862
return ret;
863
}
864
865
/* Lower privileges permanently */
866
__attribute__((warn_unused_result))
867
int lower_privileges_permanently(void){
868
int old_errno = errno;
869
int ret = 0;
870
if(setuid(uid) == -1){
871
ret = errno;
872
}
873
errno = old_errno;
874
return ret;
875
}
876
877
/* Helper function to add_local_route() and delete_local_route() */
878
__attribute__((nonnull, warn_unused_result))
879
static bool add_delete_local_route(const bool add,
880
const char *address,
881
AvahiIfIndex if_index){
882
int ret;
883
char helper[] = "mandos-client-iprouteadddel";
884
char add_arg[] = "add";
885
char delete_arg[] = "delete";
886
char debug_flag[] = "--debug";
887
char *pluginhelperdir = getenv("MANDOSPLUGINHELPERDIR");
888
if(pluginhelperdir == NULL){
889
if(debug){
890
fprintf_plus(stderr, "MANDOSPLUGINHELPERDIR environment"
891
" variable not set; cannot run helper\n");
892
}
893
return false;
894
}
895
896
char interface[IF_NAMESIZE];
897
if(if_indextoname((unsigned int)if_index, interface) == NULL){
898
perror_plus("if_indextoname");
899
return false;
900
}
901
902
int devnull = (int)TEMP_FAILURE_RETRY(open("/dev/null", O_RDONLY));
903
if(devnull == -1){
904
perror_plus("open(\"/dev/null\", O_RDONLY)");
905
return false;
906
}
907
pid_t pid = fork();
908
if(pid == 0){
909
/* Child */
910
/* Raise privileges */
911
errno = raise_privileges_permanently();
912
if(errno != 0){
913
perror_plus("Failed to raise privileges");
914
/* _exit(EX_NOPERM); */
915
} else {
916
/* Set group */
917
errno = 0;
918
ret = setgid(0);
919
if(ret == -1){
920
perror_plus("setgid");
921
_exit(EX_NOPERM);
922
}
923
/* Reset supplementary groups */
924
errno = 0;
925
ret = setgroups(0, NULL);
926
if(ret == -1){
927
perror_plus("setgroups");
928
_exit(EX_NOPERM);
929
}
930
}
931
ret = dup2(devnull, STDIN_FILENO);
932
if(ret == -1){
933
perror_plus("dup2(devnull, STDIN_FILENO)");
934
_exit(EX_OSERR);
935
}
936
ret = close(devnull);
937
if(ret == -1){
938
perror_plus("close");
939
_exit(EX_OSERR);
940
}
941
ret = dup2(STDERR_FILENO, STDOUT_FILENO);
942
if(ret == -1){
943
perror_plus("dup2(STDERR_FILENO, STDOUT_FILENO)");
944
_exit(EX_OSERR);
945
}
946
int helperdir_fd = (int)TEMP_FAILURE_RETRY(open(pluginhelperdir,
947
O_RDONLY
948
| O_DIRECTORY
949
| O_PATH
950
| O_CLOEXEC));
951
if(helperdir_fd == -1){
952
perror_plus("open");
953
_exit(EX_UNAVAILABLE);
954
}
955
int helper_fd = (int)TEMP_FAILURE_RETRY(openat(helperdir_fd,
956
helper, O_RDONLY));
957
if(helper_fd == -1){
958
perror_plus("openat");
959
close(helperdir_fd);
960
_exit(EX_UNAVAILABLE);
961
}
962
close(helperdir_fd);
963
#ifdef __GNUC__
964
#pragma GCC diagnostic push
965
#pragma GCC diagnostic ignored "-Wcast-qual"
966
#endif
967
if(fexecve(helper_fd, (char *const [])
968
{ helper, add ? add_arg : delete_arg, (char *)address,
969
interface, debug ? debug_flag : NULL, NULL },
970
environ) == -1){
971
#ifdef __GNUC__
972
#pragma GCC diagnostic pop
973
#endif
974
perror_plus("fexecve");
975
_exit(EXIT_FAILURE);
976
}
977
}
978
if(pid == -1){
979
perror_plus("fork");
980
return false;
981
}
982
int status;
983
pid_t pret = -1;
984
errno = 0;
985
do {
986
pret = waitpid(pid, &status, 0);
987
if(pret == -1 and errno == EINTR and quit_now){
988
int errno_raising = 0;
989
if((errno = raise_privileges()) != 0){
990
errno_raising = errno;
991
perror_plus("Failed to raise privileges in order to"
992
" kill helper program");
993
}
994
if(kill(pid, SIGTERM) == -1){
995
perror_plus("kill");
996
}
997
if((errno_raising == 0) and (errno = lower_privileges()) != 0){
998
perror_plus("Failed to lower privileges after killing"
999
" helper program");
1000
}
1001
return false;
1002
}
1003
} while(pret == -1 and errno == EINTR);
1004
if(pret == -1){
1005
perror_plus("waitpid");
1006
return false;
1007
}
1008
if(WIFEXITED(status)){
1009
if(WEXITSTATUS(status) != 0){
1010
fprintf_plus(stderr, "Error: iprouteadddel exited"
1011
" with status %d\n", WEXITSTATUS(status));
1012
return false;
1013
}
1014
return true;
1015
}
1016
if(WIFSIGNALED(status)){
1017
fprintf_plus(stderr, "Error: iprouteadddel died by"
1018
" signal %d\n", WTERMSIG(status));
1019
return false;
1020
}
1021
fprintf_plus(stderr, "Error: iprouteadddel crashed\n");
1022
return false;
1023
}
1024
1025
__attribute__((nonnull, warn_unused_result))
1026
static bool add_local_route(const char *address,
1027
AvahiIfIndex if_index){
1028
if(debug){
1029
fprintf_plus(stderr, "Adding route to %s\n", address);
1030
}
1031
return add_delete_local_route(true, address, if_index);
1032
}
1033
1034
__attribute__((nonnull, warn_unused_result))
1035
static bool delete_local_route(const char *address,
1036
AvahiIfIndex if_index){
1037
if(debug){
1038
fprintf_plus(stderr, "Removing route to %s\n", address);
1039
}
1040
return add_delete_local_route(false, address, if_index);
1041
}
1042
760
1043
/* Called when a Mandos server is found */
761
1044
__attribute__((nonnull, warn_unused_result))
762
1045
static int start_mandos_communication(const char *ip, in_port_t port,
773
1056
int retval = -1;
774
1057
gnutls_session_t session;
775
1058
int pf; /* Protocol family */
1059
bool route_added = false;
776
1060
777
1061
errno = 0;
778
1062
800
1084
bool match = false;
801
1085
{
802
1086
char *interface = NULL;
803
while((interface=argz_next(mc->interfaces, mc->interfaces_size,
804
interface))){
1087
while((interface = argz_next(mc->interfaces,
1088
mc->interfaces_size,
1089
interface))){
805
1090
if(if_nametoindex(interface) == (unsigned int)if_index){
806
1091
match = true;
807
1092
break;
836
1121
PRIuMAX "\n", ip, (uintmax_t)port);
837
1122
}
838
1123
839
tcp_sd = socket(pf, SOCK_STREAM, 0);
1124
tcp_sd = socket(pf, SOCK_STREAM | SOCK_CLOEXEC, 0);
840
1125
if(tcp_sd < 0){
841
1126
int e = errno;
842
1127
perror_plus("socket");
849
1134
goto mandos_end;
850
1135
}
851
1136
852
memset(&to, 0, sizeof(to));
853
1137
if(af == AF_INET6){
854
((struct sockaddr_in6 *)&to)->sin6_family = (sa_family_t)af;
855
ret = inet_pton(af, ip, &((struct sockaddr_in6 *)&to)->sin6_addr);
1138
struct sockaddr_in6 *to6 = (struct sockaddr_in6 *)&to;
1139
*to6 = (struct sockaddr_in6){ .sin6_family = (sa_family_t)af };
1140
ret = inet_pton(af, ip, &to6->sin6_addr);
856
1141
} else { /* IPv4 */
857
((struct sockaddr_in *)&to)->sin_family = (sa_family_t)af;
858
ret = inet_pton(af, ip, &((struct sockaddr_in *)&to)->sin_addr);
1142
struct sockaddr_in *to4 = (struct sockaddr_in *)&to;
1143
*to4 = (struct sockaddr_in){ .sin_family = (sa_family_t)af };
1144
ret = inet_pton(af, ip, &to4->sin_addr);
859
1145
}
860
1146
if(ret < 0 ){
861
1147
int e = errno;
931
1217
goto mandos_end;
932
1218
}
933
1219
934
if(af == AF_INET6){
935
ret = connect(tcp_sd, (struct sockaddr *)&to,
936
sizeof(struct sockaddr_in6));
937
} else {
938
ret = connect(tcp_sd, (struct sockaddr *)&to, /* IPv4 */
939
sizeof(struct sockaddr_in));
940
}
941
if(ret < 0){
942
if((errno != ECONNREFUSED and errno != ENETUNREACH) or debug){
943
int e = errno;
944
perror_plus("connect");
945
errno = e;
946
}
947
goto mandos_end;
948
}
949
950
if(quit_now){
951
errno = EINTR;
952
goto mandos_end;
1220
while(true){
1221
if(af == AF_INET6){
1222
ret = connect(tcp_sd, (struct sockaddr *)&to,
1223
sizeof(struct sockaddr_in6));
1224
} else {
1225
ret = connect(tcp_sd, (struct sockaddr *)&to, /* IPv4 */
1226
sizeof(struct sockaddr_in));
1227
}
1228
if(ret < 0){
1229
if(((errno == ENETUNREACH) or (errno == EHOSTUNREACH))
1230
and if_index != AVAHI_IF_UNSPEC
1231
and connect_to == NULL
1232
and not route_added and
1233
((af == AF_INET6 and not
1234
IN6_IS_ADDR_LINKLOCAL(&(((struct sockaddr_in6 *)
1235
&to)->sin6_addr)))
1236
or (af == AF_INET and
1237
/* Not a a IPv4LL address */
1238
(ntohl(((struct sockaddr_in *)&to)->sin_addr.s_addr)
1239
& 0xFFFF0000L) != 0xA9FE0000L))){
1240
/* Work around Avahi bug - Avahi does not announce link-local
1241
addresses if it has a global address, so local hosts with
1242
*only* a link-local address (e.g. Mandos clients) cannot
1243
connect to a Mandos server announced by Avahi on a server
1244
host with a global address. Work around this by retrying
1245
with an explicit route added with the server's address.
1246
1247
Avahi bug reference:
1248
https://lists.freedesktop.org/archives/avahi/2010-February/001833.html
1249
https://bugs.debian.org/587961
1250
*/
1251
if(debug){
1252
fprintf_plus(stderr, "Mandos server unreachable, trying"
1253
" direct route\n");
1254
}
1255
int e = errno;
1256
route_added = add_local_route(ip, if_index);
1257
if(route_added){
1258
continue;
1259
}
1260
errno = e;
1261
}
1262
if(errno != ECONNREFUSED or debug){
1263
int e = errno;
1264
perror_plus("connect");
1265
errno = e;
1266
}
1267
goto mandos_end;
1268
}
1269
1270
if(quit_now){
1271
errno = EINTR;
1272
goto mandos_end;
1273
}
1274
break;
953
1275
}
954
1276
955
1277
const char *out = mandos_protocol_version;
1109
1431
&decrypted_buffer, mc);
1110
1432
if(decrypted_buffer_size >= 0){
1111
1433
1434
clearerr(stdout);
1112
1435
written = 0;
1113
1436
while(written < (size_t) decrypted_buffer_size){
1114
1437
if(quit_now){
1130
1453
}
1131
1454
written += (size_t)ret;
1132
1455
}
1456
ret = fflush(stdout);
1457
if(ret != 0){
1458
int e = errno;
1459
if(debug){
1460
fprintf_plus(stderr, "Error writing encrypted data: %s\n",
1461
strerror(errno));
1462
}
1463
errno = e;
1464
goto mandos_end;
1465
}
1133
1466
retval = 0;
1134
1467
}
1135
1468
}
1138
1471
1139
1472
mandos_end:
1140
1473
{
1474
if(route_added){
1475
if(not delete_local_route(ip, if_index)){
1476
fprintf_plus(stderr, "Failed to delete local route to %s on"
1477
" interface %d", ip, if_index);
1478
}
1479
}
1141
1480
int e = errno;
1142
1481
free(decrypted_buffer);
1143
1482
free(buffer);
1144
1483
if(tcp_sd >= 0){
1145
ret = (int)TEMP_FAILURE_RETRY(close(tcp_sd));
1484
ret = close(tcp_sd);
1146
1485
}
1147
1486
if(ret == -1){
1148
1487
if(e == 0){
1160
1499
return retval;
1161
1500
}
1162
1501
1163
__attribute__((nonnull))
1164
1502
static void resolve_callback(AvahiSServiceResolver *r,
1165
1503
AvahiIfIndex interface,
1166
1504
AvahiProtocol proto,
1303
1641
__attribute__((nonnull, warn_unused_result))
1304
1642
bool get_flags(const char *ifname, struct ifreq *ifr){
1305
1643
int ret;
1306
error_t ret_errno;
1644
int old_errno;
1307
1645
1308
1646
int s = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1309
1647
if(s < 0){
1310
ret_errno = errno;
1648
old_errno = errno;
1311
1649
perror_plus("socket");
1312
errno = ret_errno;
1650
errno = old_errno;
1313
1651
return false;
1314
1652
}
1315
strcpy(ifr->ifr_name, ifname);
1653
strncpy(ifr->ifr_name, ifname, IF_NAMESIZE);
1654
ifr->ifr_name[IF_NAMESIZE-1] = '\0'; /* NUL terminate */
1316
1655
ret = ioctl(s, SIOCGIFFLAGS, ifr);
1317
1656
if(ret == -1){
1318
1657
if(debug){
1319
ret_errno = errno;
1658
old_errno = errno;
1320
1659
perror_plus("ioctl SIOCGIFFLAGS");
1321
errno = ret_errno;
1660
errno = old_errno;
1661
}
1662
if((close(s) == -1) and debug){
1663
old_errno = errno;
1664
perror_plus("close");
1665
errno = old_errno;
1322
1666
}
1323
1667
return false;
1324
1668
}
1669
if((close(s) == -1) and debug){
1670
old_errno = errno;
1671
perror_plus("close");
1672
errno = old_errno;
1673
}
1325
1674
return true;
1326
1675
}
1327
1676
1569
1918
}
1570
1919
}
1571
1920
1572
/* Set effective uid to 0, return errno */
1573
__attribute__((warn_unused_result))
1574
error_t raise_privileges(void){
1575
error_t old_errno = errno;
1576
error_t ret_errno = 0;
1577
if(seteuid(0) == -1){
1578
ret_errno = errno;
1579
}
1580
errno = old_errno;
1581
return ret_errno;
1582
}
1583
1584
/* Set effective and real user ID to 0. Return errno. */
1585
__attribute__((warn_unused_result))
1586
error_t raise_privileges_permanently(void){
1587
error_t old_errno = errno;
1588
error_t ret_errno = raise_privileges();
1589
if(ret_errno != 0){
1590
errno = old_errno;
1591
return ret_errno;
1592
}
1593
if(setuid(0) == -1){
1594
ret_errno = errno;
1595
}
1596
errno = old_errno;
1597
return ret_errno;
1598
}
1599
1600
/* Set effective user ID to unprivileged saved user ID */
1601
__attribute__((warn_unused_result))
1602
error_t lower_privileges(void){
1603
error_t old_errno = errno;
1604
error_t ret_errno = 0;
1605
if(seteuid(uid) == -1){
1606
ret_errno = errno;
1607
}
1608
errno = old_errno;
1609
return ret_errno;
1610
}
1611
1612
/* Lower privileges permanently */
1613
__attribute__((warn_unused_result))
1614
error_t lower_privileges_permanently(void){
1615
error_t old_errno = errno;
1616
error_t ret_errno = 0;
1617
if(setuid(uid) == -1){
1618
ret_errno = errno;
1619
}
1620
errno = old_errno;
1621
return ret_errno;
1622
}
1623
1624
1921
__attribute__((nonnull))
1625
1922
void run_network_hooks(const char *mode, const char *interface,
1626
1923
const float delay){
1627
1924
struct dirent **direntries = NULL;
1628
1925
if(hookdir_fd == -1){
1629
hookdir_fd = open(hookdir, O_RDONLY);
1926
hookdir_fd = open(hookdir, O_RDONLY | O_DIRECTORY | O_PATH
1927
| O_CLOEXEC);
1630
1928
if(hookdir_fd == -1){
1631
1929
if(errno == ENOENT){
1632
1930
if(debug){
1639
1937
return;
1640
1938
}
1641
1939
}
1642
#ifdef __GLIBC__
1643
#if __GLIBC_PREREQ(2, 15)
1940
int devnull = (int)TEMP_FAILURE_RETRY(open("/dev/null", O_RDONLY));
1941
if(devnull == -1){
1942
perror_plus("open(\"/dev/null\", O_RDONLY)");
1943
return;
1944
}
1644
1945
int numhooks = scandirat(hookdir_fd, ".", &direntries,
1645
1946
runnable_hook, alphasort);
1646
#else /* not __GLIBC_PREREQ(2, 15) */
1647
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1648
alphasort);
1649
#endif /* not __GLIBC_PREREQ(2, 15) */
1650
#else /* not __GLIBC__ */
1651
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1652
alphasort);
1653
#endif /* not __GLIBC__ */
1654
1947
if(numhooks == -1){
1655
1948
perror_plus("scandir");
1949
close(devnull);
1656
1950
return;
1657
1951
}
1658
1952
struct dirent *direntry;
1659
1953
int ret;
1660
int devnull = open("/dev/null", O_RDONLY);
1661
1954
for(int i = 0; i < numhooks; i++){
1662
1955
direntry = direntries[i];
1663
1956
if(debug){
1687
1980
perror_plus("setgroups");
1688
1981
_exit(EX_NOPERM);
1689
1982
}
1690
ret = dup2(devnull, STDIN_FILENO);
1691
if(ret == -1){
1692
perror_plus("dup2(devnull, STDIN_FILENO)");
1693
_exit(EX_OSERR);
1694
}
1695
ret = close(devnull);
1696
if(ret == -1){
1697
perror_plus("close");
1698
_exit(EX_OSERR);
1699
}
1700
ret = dup2(STDERR_FILENO, STDOUT_FILENO);
1701
if(ret == -1){
1702
perror_plus("dup2(STDERR_FILENO, STDOUT_FILENO)");
1703
_exit(EX_OSERR);
1704
}
1705
1983
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1706
1984
if(ret == -1){
1707
1985
perror_plus("setenv");
1742
2020
_exit(EX_OSERR);
1743
2021
}
1744
2022
}
1745
int hook_fd = openat(hookdir_fd, direntry->d_name, O_RDONLY);
2023
int hook_fd = (int)TEMP_FAILURE_RETRY(openat(hookdir_fd,
2024
direntry->d_name,
2025
O_RDONLY));
1746
2026
if(hook_fd == -1){
1747
2027
perror_plus("openat");
1748
2028
_exit(EXIT_FAILURE);
1749
2029
}
1750
if((int)TEMP_FAILURE_RETRY(close(hookdir_fd)) == -1){
2030
if(close(hookdir_fd) == -1){
1751
2031
perror_plus("close");
1752
2032
_exit(EXIT_FAILURE);
1753
2033
}
2034
ret = dup2(devnull, STDIN_FILENO);
2035
if(ret == -1){
2036
perror_plus("dup2(devnull, STDIN_FILENO)");
2037
_exit(EX_OSERR);
2038
}
2039
ret = close(devnull);
2040
if(ret == -1){
2041
perror_plus("close");
2042
_exit(EX_OSERR);
2043
}
2044
ret = dup2(STDERR_FILENO, STDOUT_FILENO);
2045
if(ret == -1){
2046
perror_plus("dup2(STDERR_FILENO, STDOUT_FILENO)");
2047
_exit(EX_OSERR);
2048
}
1754
2049
if(fexecve(hook_fd, (char *const []){ direntry->d_name, NULL },
1755
2050
environ) == -1){
1756
2051
perror_plus("fexecve");
1796
2091
free(direntry);
1797
2092
}
1798
2093
free(direntries);
1799
if((int)TEMP_FAILURE_RETRY(close(hookdir_fd)) == -1){
2094
if(close(hookdir_fd) == -1){
1800
2095
perror_plus("close");
1801
2096
} else {
1802
2097
hookdir_fd = -1;
1805
2100
}
1806
2101
1807
2102
__attribute__((nonnull, warn_unused_result))
1808
error_t bring_up_interface(const char *const interface,
1809
const float delay){
1810
error_t old_errno = errno;
2103
int bring_up_interface(const char *const interface,
2104
const float delay){
2105
int old_errno = errno;
1811
2106
int ret;
1812
2107
struct ifreq network;
1813
2108
unsigned int if_index = if_nametoindex(interface);
1823
2118
}
1824
2119
1825
2120
if(not interface_is_up(interface)){
1826
error_t ret_errno = 0, ioctl_errno = 0;
2121
int ret_errno = 0;
2122
int ioctl_errno = 0;
1827
2123
if(not get_flags(interface, &network)){
1828
2124
ret_errno = errno;
1829
2125
fprintf_plus(stderr, "Failed to get flags for interface "
1842
2138
}
1843
2139
1844
2140
if(quit_now){
1845
ret = (int)TEMP_FAILURE_RETRY(close(sd));
2141
ret = close(sd);
1846
2142
if(ret == -1){
1847
2143
perror_plus("close");
1848
2144
}
1898
2194
}
1899
2195
1900
2196
/* Close the socket */
1901
ret = (int)TEMP_FAILURE_RETRY(close(sd));
2197
ret = close(sd);
1902
2198
if(ret == -1){
1903
2199
perror_plus("close");
1904
2200
}
1916
2212
1917
2213
/* Sleep checking until interface is running.
1918
2214
Check every 0.25s, up to total time of delay */
1919
for(int i=0; i < delay * 4; i++){
2215
for(int i = 0; i < delay * 4; i++){
1920
2216
if(interface_is_running(interface)){
1921
2217
break;
1922
2218
}
1932
2228
}
1933
2229
1934
2230
__attribute__((nonnull, warn_unused_result))
1935
error_t take_down_interface(const char *const interface){
1936
error_t old_errno = errno;
2231
int take_down_interface(const char *const interface){
2232
int old_errno = errno;
1937
2233
struct ifreq network;
1938
2234
unsigned int if_index = if_nametoindex(interface);
1939
2235
if(if_index == 0){
1942
2238
return ENXIO;
1943
2239
}
1944
2240
if(interface_is_up(interface)){
1945
error_t ret_errno = 0, ioctl_errno = 0;
2241
int ret_errno = 0;
2242
int ioctl_errno = 0;
1946
2243
if(not get_flags(interface, &network) and debug){
1947
2244
ret_errno = errno;
1948
2245
fprintf_plus(stderr, "Failed to get flags for interface "
1986
2283
}
1987
2284
1988
2285
/* Close the socket */
1989
int ret = (int)TEMP_FAILURE_RETRY(close(sd));
2286
int ret = close(sd);
1990
2287
if(ret == -1){
1991
2288
perror_plus("close");
1992
2289
}
2008
2305
2009
2306
int main(int argc, char *argv[]){
2010
2307
mandos_context mc = { .server = NULL, .dh_bits = 0,
2011
.priority = "SECURE256:!CTYPE-X.509:"
2012
"+CTYPE-OPENPGP:!RSA", .current_server = NULL,
2013
.interfaces = NULL, .interfaces_size = 0 };
2308
.priority = "SECURE256:!CTYPE-X.509"
2309
":+CTYPE-OPENPGP:!RSA:+SIGN-DSA-SHA256",
2310
.current_server = NULL, .interfaces = NULL,
2311
.interfaces_size = 0 };
2014
2312
AvahiSServiceBrowser *sb = NULL;
2015
2313
error_t ret_errno;
2016
2314
int ret;
2025
2323
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
2026
2324
const char *seckey = PATHDIR "/" SECKEY;
2027
2325
const char *pubkey = PATHDIR "/" PUBKEY;
2326
const char *dh_params_file = NULL;
2028
2327
char *interfaces_hooks = NULL;
2029
2328
2030
2329
bool gnutls_initialized = false;
2083
2382
.doc = "Bit length of the prime number used in the"
2084
2383
" Diffie-Hellman key exchange",
2085
2384
.group = 2 },
2385
{ .name = "dh-params", .key = 134,
2386
.arg = "FILE",
2387
.doc = "PEM-encoded PKCS#3 file with pre-generated parameters"
2388
" for the Diffie-Hellman key exchange",
2389
.group = 2 },
2086
2390
{ .name = "priority", .key = 130,
2087
2391
.arg = "STRING",
2088
2392
.doc = "GnuTLS priority string for the TLS handshake",
2143
2447
}
2144
2448
mc.dh_bits = (typeof(mc.dh_bits))tmpmax;
2145
2449
break;
2450
case 134: /* --dh-params */
2451
dh_params_file = arg;
2452
break;
2146
2453
case 130: /* --priority */
2147
2454
mc.priority = arg;
2148
2455
break;
2188
2495
.args_doc = "",
2189
2496
.doc = "Mandos client -- Get and decrypt"
2190
2497
" passwords from a Mandos server" };
2191
ret = argp_parse(&argp, argc, argv,
2192
ARGP_IN_ORDER | ARGP_NO_HELP, 0, NULL);
2193
switch(ret){
2498
ret_errno = argp_parse(&argp, argc, argv,
2499
ARGP_IN_ORDER | ARGP_NO_HELP, 0, NULL);
2500
switch(ret_errno){
2194
2501
case 0:
2195
2502
break;
2196
2503
case ENOMEM:
2197
2504
default:
2198
errno = ret;
2505
errno = ret_errno;
2199
2506
perror_plus("argp_parse");
2200
2507
exitcode = EX_OSERR;
2201
2508
goto end;
2204
2511
goto end;
2205
2512
}
2206
2513
}
2207
2514
2208
2515
{
2209
2516
/* Work around Debian bug #633582:
2210
<http://bugs.debian.org/633582> */
2517
<https://bugs.debian.org/633582> */
2211
2518
2212
2519
/* Re-raise privileges */
2213
ret_errno = raise_privileges();
2214
if(ret_errno != 0){
2215
errno = ret_errno;
2520
ret = raise_privileges();
2521
if(ret != 0){
2522
errno = ret;
2216
2523
perror_plus("Failed to raise privileges");
2217
2524
} else {
2218
2525
struct stat st;
2234
2541
}
2235
2542
}
2236
2543
}
2237
TEMP_FAILURE_RETRY(close(seckey_fd));
2544
close(seckey_fd);
2238
2545
}
2239
2546
}
2240
2547
2241
2548
if(strcmp(pubkey, PATHDIR "/" PUBKEY) == 0){
2242
2549
int pubkey_fd = open(pubkey, O_RDONLY);
2243
2550
if(pubkey_fd == -1){
2255
2562
}
2256
2563
}
2257
2564
}
2258
TEMP_FAILURE_RETRY(close(pubkey_fd));
2259
}
2260
}
2261
2565
close(pubkey_fd);
2566
}
2567
}
2568
2569
if(dh_params_file != NULL
2570
and strcmp(dh_params_file, PATHDIR "/dhparams.pem" ) == 0){
2571
int dhparams_fd = open(dh_params_file, O_RDONLY);
2572
if(dhparams_fd == -1){
2573
perror_plus("open");
2574
} else {
2575
ret = (int)TEMP_FAILURE_RETRY(fstat(dhparams_fd, &st));
2576
if(ret == -1){
2577
perror_plus("fstat");
2578
} else {
2579
if(S_ISREG(st.st_mode)
2580
and st.st_uid == 0 and st.st_gid == 0){
2581
ret = fchown(dhparams_fd, uid, gid);
2582
if(ret == -1){
2583
perror_plus("fchown");
2584
}
2585
}
2586
}
2587
close(dhparams_fd);
2588
}
2589
}
2590
2262
2591
/* Lower privileges */
2263
ret_errno = lower_privileges();
2264
if(ret_errno != 0){
2265
errno = ret_errno;
2592
ret = lower_privileges();
2593
if(ret != 0){
2594
errno = ret;
2266
2595
perror_plus("Failed to lower privileges");
2267
2596
}
2268
2597
}
2438
2767
errno = bring_up_interface(interface, delay);
2439
2768
if(not interface_was_up){
2440
2769
if(errno != 0){
2441
perror_plus("Failed to bring up interface");
2770
fprintf_plus(stderr, "Failed to bring up interface \"%s\":"
2771
" %s\n", interface, strerror(errno));
2442
2772
} else {
2443
2773
errno = argz_add(&interfaces_to_take_down,
2444
2774
&interfaces_to_take_down_size,
2467
2797
goto end;
2468
2798
}
2469
2799
2470
ret = init_gnutls_global(pubkey, seckey, &mc);
2800
ret = init_gnutls_global(pubkey, seckey, dh_params_file, &mc);
2471
2801
if(ret == -1){
2472
2802
fprintf_plus(stderr, "init_gnutls_global failed\n");
2473
2803
exitcode = EX_UNAVAILABLE;
2595
2925
2596
2926
/* Allocate a new server */
2597
2927
mc.server = avahi_server_new(avahi_simple_poll_get(simple_poll),
2598
&config, NULL, NULL, &ret_errno);
2928
&config, NULL, NULL, &ret);
2599
2929
2600
2930
/* Free the Avahi configuration data */
2601
2931
avahi_server_config_free(&config);
2604
2934
/* Check if creating the Avahi server object succeeded */
2605
2935
if(mc.server == NULL){
2606
2936
fprintf_plus(stderr, "Failed to create Avahi server: %s\n",
2607
avahi_strerror(ret_errno));
2937
avahi_strerror(ret));
2608
2938
exitcode = EX_UNAVAILABLE;
2609
2939
goto end;
2610
2940
}
2645
2975
end:
2646
2976
2647
2977
if(debug){
2648
fprintf_plus(stderr, "%s exiting\n", argv[0]);
2978
if(signal_received){
2979
fprintf_plus(stderr, "%s exiting due to signal %d: %s\n",
2980
argv[0], signal_received,
2981
strsignal(signal_received));
2982
} else {
2983
fprintf_plus(stderr, "%s exiting\n", argv[0]);
2984
}
2649
2985
}
2650
2986
2651
2987
/* Cleanup things */
2662
2998
2663
2999
if(gnutls_initialized){
2664
3000
gnutls_certificate_free_credentials(mc.cred);
2665
gnutls_global_deinit();
2666
3001
gnutls_dh_params_deinit(mc.dh_params);
2667
3002
}
2668
3003
2691
3026
2692
3027
/* Re-raise privileges */
2693
3028
{
2694
ret_errno = raise_privileges();
2695
if(ret_errno != 0){
2696
errno = ret_errno;
3029
ret = raise_privileges();
3030
if(ret != 0){
3031
errno = ret;
2697
3032
perror_plus("Failed to raise privileges");
2698
3033
} else {
2699
3034
2704
3039
/* Take down the network interfaces which were brought up */
2705
3040
{
2706
3041
char *interface = NULL;
2707
while((interface=argz_next(interfaces_to_take_down,
2708
interfaces_to_take_down_size,
2709
interface))){
2710
ret_errno = take_down_interface(interface);
2711
if(ret_errno != 0){
2712
errno = ret_errno;
3042
while((interface = argz_next(interfaces_to_take_down,
3043
interfaces_to_take_down_size,
3044
interface))){
3045
ret = take_down_interface(interface);
3046
if(ret != 0){
3047
errno = ret;
2713
3048
perror_plus("Failed to take down interface");
2714
3049
}
2715
3050
}
2720
3055
}
2721
3056
}
2722
3057
2723
ret_errno = lower_privileges_permanently();
2724
if(ret_errno != 0){
2725
errno = ret_errno;
3058
ret = lower_privileges_permanently();
3059
if(ret != 0){
3060
errno = ret;
2726
3061
perror_plus("Failed to lower privileges permanently");
2727
3062
}
2728
3063
}
2730
3065
free(interfaces_to_take_down);
2731
3066
free(interfaces_hooks);
2732
3067
3068
void clean_dir_at(int base, const char * const dirname,
3069
uintmax_t level){
3070
struct dirent **direntries = NULL;
3071
int dret;
3072
int dir_fd = (int)TEMP_FAILURE_RETRY(openat(base, dirname,
3073
O_RDONLY
3074
| O_NOFOLLOW
3075
| O_DIRECTORY
3076
| O_PATH));
3077
if(dir_fd == -1){
3078
perror_plus("open");
3079
return;
3080
}
3081
int numentries = scandirat(dir_fd, ".", &direntries,
3082
notdotentries, alphasort);
3083
if(numentries >= 0){
3084
for(int i = 0; i < numentries; i++){
3085
if(debug){
3086
fprintf_plus(stderr, "Unlinking \"%s/%s\"\n",
3087
dirname, direntries[i]->d_name);
3088
}
3089
dret = unlinkat(dir_fd, direntries[i]->d_name, 0);
3090
if(dret == -1){
3091
if(errno == EISDIR){
3092
dret = unlinkat(dir_fd, direntries[i]->d_name,
3093
AT_REMOVEDIR);
3094
}
3095
if((dret == -1) and (errno == ENOTEMPTY)
3096
and (strcmp(direntries[i]->d_name, "private-keys-v1.d")
3097
== 0) and (level == 0)){
3098
/* Recurse only in this special case */
3099
clean_dir_at(dir_fd, direntries[i]->d_name, level+1);
3100
dret = 0;
3101
}
3102
if((dret == -1) and (errno != ENOENT)){
3103
fprintf_plus(stderr, "unlink(\"%s/%s\"): %s\n", dirname,
3104
direntries[i]->d_name, strerror(errno));
3105
}
3106
}
3107
free(direntries[i]);
3108
}
3109
3110
/* need to clean even if 0 because man page doesn't specify */
3111
free(direntries);
3112
dret = unlinkat(base, dirname, AT_REMOVEDIR);
3113
if(dret == -1 and errno != ENOENT){
3114
perror_plus("rmdir");
3115
}
3116
} else {
3117
perror_plus("scandirat");
3118
}
3119
close(dir_fd);
3120
}
3121
2733
3122
/* Removes the GPGME temp directory and all files inside */
2734
3123
if(tempdir != NULL){
2735
struct dirent **direntries = NULL;
2736
int tempdir_fd = (int)TEMP_FAILURE_RETRY(open(tempdir, O_RDONLY |
2737
O_NOFOLLOW));
2738
if(tempdir_fd == -1){
2739
perror_plus("open");
2740
} else {
2741
#ifdef __GLIBC__
2742
#if __GLIBC_PREREQ(2, 15)
2743
int numentries = scandirat(tempdir_fd, ".", &direntries,
2744
notdotentries, alphasort);
2745
#else /* not __GLIBC_PREREQ(2, 15) */
2746
int numentries = scandir(tempdir, &direntries, notdotentries,
2747
alphasort);
2748
#endif /* not __GLIBC_PREREQ(2, 15) */
2749
#else /* not __GLIBC__ */
2750
int numentries = scandir(tempdir, &direntries, notdotentries,
2751
alphasort);
2752
#endif /* not __GLIBC__ */
2753
if(numentries >= 0){
2754
for(int i = 0; i < numentries; i++){
2755
ret = unlinkat(tempdir_fd, direntries[i]->d_name, 0);
2756
if(ret == -1){
2757
fprintf_plus(stderr, "unlinkat(open(\"%s\", O_RDONLY),"
2758
" \"%s\", 0): %s\n", tempdir,
2759
direntries[i]->d_name, strerror(errno));
2760
}
2761
free(direntries[i]);
2762
}
2763
2764
/* need to clean even if 0 because man page doesn't specify */
2765
free(direntries);
2766
if(numentries == -1){
2767
perror_plus("scandir");
2768
}
2769
ret = rmdir(tempdir);
2770
if(ret == -1 and errno != ENOENT){
2771
perror_plus("rmdir");
2772
}
2773
}
2774
TEMP_FAILURE_RETRY(close(tempdir_fd));
2775
}
3124
clean_dir_at(-1, tempdir, 0);
2776
3125
}
2777
3126
2778
3127
if(quit_now){
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