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237.7.300
(compared to revision 237.7.487)
: plugins.d/mandos-client.c
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- Committer: Teddy Hogeborn
- Date: 2015-05-31 15:56:58 UTC
- mto: (237.7.594 trunk)
- mto: This revision was merged to the branch mainline in revision 325.
- Revision ID: teddy@recompile.se-20150531155658-l7znu7zlqr2dmuwd
mandos: Generate better messages in exceptions.
mandos (ProxyClient.__init__): Include fingerprint in KeyError().
(rfc3339_duration_to_delta): Include duration in ValueError().
mandos (ProxyClient.__init__): Include fingerprint in KeyError().
(rfc3339_duration_to_delta): Include duration in ValueError().
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 © 2008-2014 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
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
*/
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(), unlinkat() */
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,
311
305
return false;
312
306
}
313
307
314
ret = close(fd);
308
ret = (int)TEMP_FAILURE_RETRY(close(fd));
315
309
if(ret == -1){
316
310
perror_plus("close");
317
311
}
519
513
fprintf_plus(stderr, "GnuTLS: %s", string);
520
514
}
521
515
522
__attribute__((nonnull(1, 2, 4), warn_unused_result))
516
__attribute__((nonnull, warn_unused_result))
523
517
static int init_gnutls_global(const char *pubkeyfilename,
524
518
const char *seckeyfilename,
525
const char *dhparamsfilename,
526
519
mandos_context *mc){
527
520
int ret;
528
521
unsigned int uret;
531
524
fprintf_plus(stderr, "Initializing GnuTLS\n");
532
525
}
533
526
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();
547
548
return -1;
548
549
}
549
550
574
575
safer_gnutls_strerror(ret));
575
576
goto globalfail;
576
577
}
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;
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;
588
585
while(true){
589
params_capacity = incbuffer((char **)¶ms.data,
590
(size_t)params.size,
591
(size_t)params_capacity);
592
if(params_capacity == 0){
586
buffer_capacity = incbuffer((char **)&buffer.data,
587
(size_t)buffer.size,
588
(size_t)buffer_capacity);
589
if(buffer_capacity == 0){
593
590
perror_plus("incbuffer");
594
free(params.data);
595
params.data = NULL;
596
dhparamsfilename = NULL;
591
free(buffer.data);
592
buffer.data = NULL;
597
593
break;
598
594
}
599
ssize_t bytes_read = read(dhpfile,
600
params.data + params.size,
595
ssize_t bytes_read = read(secfile, buffer.data + buffer.size,
601
596
BUFFER_SIZE);
602
597
/* EOF */
603
598
if(bytes_read == 0){
606
601
/* check bytes_read for failure */
607
602
if(bytes_read < 0){
608
603
perror_plus("read");
609
free(params.data);
610
params.data = NULL;
611
dhparamsfilename = NULL;
612
break;
613
}
614
params.size += (unsigned int)bytes_read;
615
}
616
close(dhpfile);
617
if(params.data == NULL){
618
dhparamsfilename = NULL;
619
}
620
if(dhparamsfilename == NULL){
621
break;
622
}
623
ret = gnutls_dh_params_import_pkcs3(mc->dh_params, ¶ms,
624
GNUTLS_X509_FMT_PEM);
625
if(ret != GNUTLS_E_SUCCESS){
626
fprintf_plus(stderr, "Failed to parse DH parameters in file"
627
" \"%s\": %s\n", dhparamsfilename,
628
safer_gnutls_strerror(ret));
629
dhparamsfilename = NULL;
630
}
631
free(params.data);
632
} while(false);
633
}
634
if(dhparamsfilename == NULL){
635
if(mc->dh_bits == 0){
636
/* Find out the optimal number of DH bits */
637
/* Try to read the private key file */
638
gnutls_datum_t buffer = { .data = NULL, .size = 0 };
639
do {
640
int secfile = open(seckeyfilename, O_RDONLY);
641
if(secfile == -1){
642
perror_plus("open");
643
break;
644
}
645
size_t buffer_capacity = 0;
646
while(true){
647
buffer_capacity = incbuffer((char **)&buffer.data,
648
(size_t)buffer.size,
649
(size_t)buffer_capacity);
650
if(buffer_capacity == 0){
651
perror_plus("incbuffer");
652
free(buffer.data);
653
buffer.data = NULL;
654
break;
655
}
656
ssize_t bytes_read = read(secfile,
657
buffer.data + buffer.size,
658
BUFFER_SIZE);
659
/* EOF */
660
if(bytes_read == 0){
661
break;
662
}
663
/* check bytes_read for failure */
664
if(bytes_read < 0){
665
perror_plus("read");
666
free(buffer.data);
667
buffer.data = NULL;
668
break;
669
}
670
buffer.size += (unsigned int)bytes_read;
671
}
672
close(secfile);
673
} while(false);
674
/* If successful, use buffer to parse private key */
675
gnutls_sec_param_t sec_param = GNUTLS_SEC_PARAM_ULTRA;
676
if(buffer.data != NULL){
677
{
678
gnutls_openpgp_privkey_t privkey = NULL;
679
ret = gnutls_openpgp_privkey_init(&privkey);
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);
680
627
if(ret != GNUTLS_E_SUCCESS){
681
fprintf_plus(stderr, "Error initializing OpenPGP key"
682
" structure: %s",
628
fprintf_plus(stderr, "Error importing OpenPGP key : %s",
683
629
safer_gnutls_strerror(ret));
684
free(buffer.data);
685
buffer.data = NULL;
686
} else {
687
ret = gnutls_openpgp_privkey_import
688
(privkey, &buffer, GNUTLS_OPENPGP_FMT_BASE64, "", 0);
689
if(ret != GNUTLS_E_SUCCESS){
690
fprintf_plus(stderr, "Error importing OpenPGP key : %s",
691
safer_gnutls_strerror(ret));
692
privkey = NULL;
693
}
694
free(buffer.data);
695
buffer.data = NULL;
696
if(privkey != NULL){
697
/* Use private key to suggest an appropriate
698
sec_param */
699
sec_param = gnutls_openpgp_privkey_sec_param(privkey);
700
gnutls_openpgp_privkey_deinit(privkey);
701
if(debug){
702
fprintf_plus(stderr, "This OpenPGP key implies using"
703
" a GnuTLS security parameter \"%s\".\n",
704
safe_string(gnutls_sec_param_get_name
705
(sec_param)));
706
}
707
}
630
privkey = NULL;
708
631
}
709
}
710
if(sec_param == GNUTLS_SEC_PARAM_UNKNOWN){
711
/* Err on the side of caution */
712
sec_param = GNUTLS_SEC_PARAM_ULTRA;
713
if(debug){
714
fprintf_plus(stderr, "Falling back to security parameter"
715
" \"%s\"\n",
716
safe_string(gnutls_sec_param_get_name
717
(sec_param)));
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
}
718
644
}
719
645
}
720
646
}
721
uret = gnutls_sec_param_to_pk_bits(GNUTLS_PK_DH, sec_param);
722
if(uret != 0){
723
mc->dh_bits = uret;
647
if(sec_param == GNUTLS_SEC_PARAM_UNKNOWN){
648
/* Err on the side of caution */
649
sec_param = GNUTLS_SEC_PARAM_ULTRA;
724
650
if(debug){
725
fprintf_plus(stderr, "A \"%s\" GnuTLS security parameter"
726
" implies %u DH bits; using that.\n",
651
fprintf_plus(stderr, "Falling back to security parameter"
652
" \"%s\"\n",
727
653
safe_string(gnutls_sec_param_get_name
728
(sec_param)),
729
mc->dh_bits);
654
(sec_param)));
730
655
}
731
} else {
732
fprintf_plus(stderr, "Failed to get implied number of DH"
733
" bits for security parameter \"%s\"): %s\n",
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
664
safe_string(gnutls_sec_param_get_name
735
665
(sec_param)),
736
safer_gnutls_strerror(ret));
737
goto globalfail;
666
mc->dh_bits);
738
667
}
739
} else if(debug){
740
fprintf_plus(stderr, "DH bits explicitly set to %u\n",
741
mc->dh_bits);
742
}
743
ret = gnutls_dh_params_generate2(mc->dh_params, mc->dh_bits);
744
if(ret != GNUTLS_E_SUCCESS){
745
fprintf_plus(stderr, "Error in GnuTLS prime generation (%u"
746
" bits): %s\n", mc->dh_bits,
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)),
747
672
safer_gnutls_strerror(ret));
748
673
goto globalfail;
749
674
}
750
}
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
751
686
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
752
687
753
688
return 0;
755
690
globalfail:
756
691
757
692
gnutls_certificate_free_credentials(mc->cred);
693
gnutls_global_deinit();
758
694
gnutls_dh_params_deinit(mc->dh_params);
759
695
return -1;
760
696
}
812
748
/* ignore client certificate if any. */
813
749
gnutls_certificate_server_set_request(*session, GNUTLS_CERT_IGNORE);
814
750
751
gnutls_dh_set_prime_bits(*session, mc->dh_bits);
752
815
753
return 0;
816
754
}
817
755
819
757
static void empty_log(__attribute__((unused)) AvahiLogLevel level,
820
758
__attribute__((unused)) const char *txt){}
821
759
822
/* Set effective uid to 0, return errno */
823
__attribute__((warn_unused_result))
824
int raise_privileges(void){
825
int old_errno = errno;
826
int ret = 0;
827
if(seteuid(0) == -1){
828
ret = errno;
829
}
830
errno = old_errno;
831
return ret;
832
}
833
834
/* Set effective and real user ID to 0. Return errno. */
835
__attribute__((warn_unused_result))
836
int raise_privileges_permanently(void){
837
int old_errno = errno;
838
int ret = raise_privileges();
839
if(ret != 0){
840
errno = old_errno;
841
return ret;
842
}
843
if(setuid(0) == -1){
844
ret = errno;
845
}
846
errno = old_errno;
847
return ret;
848
}
849
850
/* Set effective user ID to unprivileged saved user ID */
851
__attribute__((warn_unused_result))
852
int lower_privileges(void){
853
int old_errno = errno;
854
int ret = 0;
855
if(seteuid(uid) == -1){
856
ret = errno;
857
}
858
errno = old_errno;
859
return ret;
860
}
861
862
/* Lower privileges permanently */
863
__attribute__((warn_unused_result))
864
int lower_privileges_permanently(void){
865
int old_errno = errno;
866
int ret = 0;
867
if(setuid(uid) == -1){
868
ret = errno;
869
}
870
errno = old_errno;
871
return ret;
872
}
873
874
/* Helper function to add_local_route() and delete_local_route() */
875
__attribute__((nonnull, warn_unused_result))
876
static bool add_delete_local_route(const bool add,
877
const char *address,
878
AvahiIfIndex if_index){
879
int ret;
880
char helper[] = "mandos-client-iprouteadddel";
881
char add_arg[] = "add";
882
char delete_arg[] = "delete";
883
char debug_flag[] = "--debug";
884
char *pluginhelperdir = getenv("MANDOSPLUGINHELPERDIR");
885
if(pluginhelperdir == NULL){
886
if(debug){
887
fprintf_plus(stderr, "MANDOSPLUGINHELPERDIR environment"
888
" variable not set; cannot run helper\n");
889
}
890
return false;
891
}
892
893
char interface[IF_NAMESIZE];
894
if(if_indextoname((unsigned int)if_index, interface) == NULL){
895
perror_plus("if_indextoname");
896
return false;
897
}
898
899
int devnull = (int)TEMP_FAILURE_RETRY(open("/dev/null", O_RDONLY));
900
if(devnull == -1){
901
perror_plus("open(\"/dev/null\", O_RDONLY)");
902
return false;
903
}
904
pid_t pid = fork();
905
if(pid == 0){
906
/* Child */
907
/* Raise privileges */
908
errno = raise_privileges_permanently();
909
if(errno != 0){
910
perror_plus("Failed to raise privileges");
911
/* _exit(EX_NOPERM); */
912
} else {
913
/* Set group */
914
errno = 0;
915
ret = setgid(0);
916
if(ret == -1){
917
perror_plus("setgid");
918
_exit(EX_NOPERM);
919
}
920
/* Reset supplementary groups */
921
errno = 0;
922
ret = setgroups(0, NULL);
923
if(ret == -1){
924
perror_plus("setgroups");
925
_exit(EX_NOPERM);
926
}
927
}
928
ret = dup2(devnull, STDIN_FILENO);
929
if(ret == -1){
930
perror_plus("dup2(devnull, STDIN_FILENO)");
931
_exit(EX_OSERR);
932
}
933
ret = close(devnull);
934
if(ret == -1){
935
perror_plus("close");
936
_exit(EX_OSERR);
937
}
938
ret = dup2(STDERR_FILENO, STDOUT_FILENO);
939
if(ret == -1){
940
perror_plus("dup2(STDERR_FILENO, STDOUT_FILENO)");
941
_exit(EX_OSERR);
942
}
943
int helperdir_fd = (int)TEMP_FAILURE_RETRY(open(pluginhelperdir,
944
O_RDONLY
945
| O_DIRECTORY
946
| O_PATH
947
| O_CLOEXEC));
948
if(helperdir_fd == -1){
949
perror_plus("open");
950
_exit(EX_UNAVAILABLE);
951
}
952
int helper_fd = (int)TEMP_FAILURE_RETRY(openat(helperdir_fd,
953
helper, O_RDONLY));
954
if(helper_fd == -1){
955
perror_plus("openat");
956
close(helperdir_fd);
957
_exit(EX_UNAVAILABLE);
958
}
959
close(helperdir_fd);
960
#ifdef __GNUC__
961
#pragma GCC diagnostic push
962
#pragma GCC diagnostic ignored "-Wcast-qual"
963
#endif
964
if(fexecve(helper_fd, (char *const [])
965
{ helper, add ? add_arg : delete_arg, (char *)address,
966
interface, debug ? debug_flag : NULL, NULL },
967
environ) == -1){
968
#ifdef __GNUC__
969
#pragma GCC diagnostic pop
970
#endif
971
perror_plus("fexecve");
972
_exit(EXIT_FAILURE);
973
}
974
}
975
if(pid == -1){
976
perror_plus("fork");
977
return false;
978
}
979
int status;
980
pid_t pret = -1;
981
errno = 0;
982
do {
983
pret = waitpid(pid, &status, 0);
984
if(pret == -1 and errno == EINTR and quit_now){
985
int errno_raising = 0;
986
if((errno = raise_privileges()) != 0){
987
errno_raising = errno;
988
perror_plus("Failed to raise privileges in order to"
989
" kill helper program");
990
}
991
if(kill(pid, SIGTERM) == -1){
992
perror_plus("kill");
993
}
994
if((errno_raising == 0) and (errno = lower_privileges()) != 0){
995
perror_plus("Failed to lower privileges after killing"
996
" helper program");
997
}
998
return false;
999
}
1000
} while(pret == -1 and errno == EINTR);
1001
if(pret == -1){
1002
perror_plus("waitpid");
1003
return false;
1004
}
1005
if(WIFEXITED(status)){
1006
if(WEXITSTATUS(status) != 0){
1007
fprintf_plus(stderr, "Error: iprouteadddel exited"
1008
" with status %d\n", WEXITSTATUS(status));
1009
return false;
1010
}
1011
return true;
1012
}
1013
if(WIFSIGNALED(status)){
1014
fprintf_plus(stderr, "Error: iprouteadddel died by"
1015
" signal %d\n", WTERMSIG(status));
1016
return false;
1017
}
1018
fprintf_plus(stderr, "Error: iprouteadddel crashed\n");
1019
return false;
1020
}
1021
1022
__attribute__((nonnull, warn_unused_result))
1023
static bool add_local_route(const char *address,
1024
AvahiIfIndex if_index){
1025
if(debug){
1026
fprintf_plus(stderr, "Adding route to %s\n", address);
1027
}
1028
return add_delete_local_route(true, address, if_index);
1029
}
1030
1031
__attribute__((nonnull, warn_unused_result))
1032
static bool delete_local_route(const char *address,
1033
AvahiIfIndex if_index){
1034
if(debug){
1035
fprintf_plus(stderr, "Removing route to %s\n", address);
1036
}
1037
return add_delete_local_route(false, address, if_index);
1038
}
1039
1040
760
/* Called when a Mandos server is found */
1041
761
__attribute__((nonnull, warn_unused_result))
1042
762
static int start_mandos_communication(const char *ip, in_port_t port,
1053
773
int retval = -1;
1054
774
gnutls_session_t session;
1055
775
int pf; /* Protocol family */
1056
bool route_added = false;
1057
776
1058
777
errno = 0;
1059
778
1081
800
bool match = false;
1082
801
{
1083
802
char *interface = NULL;
1084
while((interface = argz_next(mc->interfaces,
1085
mc->interfaces_size,
1086
interface))){
803
while((interface=argz_next(mc->interfaces, mc->interfaces_size,
804
interface))){
1087
805
if(if_nametoindex(interface) == (unsigned int)if_index){
1088
806
match = true;
1089
807
break;
1118
836
PRIuMAX "\n", ip, (uintmax_t)port);
1119
837
}
1120
838
1121
tcp_sd = socket(pf, SOCK_STREAM | SOCK_CLOEXEC, 0);
839
tcp_sd = socket(pf, SOCK_STREAM, 0);
1122
840
if(tcp_sd < 0){
1123
841
int e = errno;
1124
842
perror_plus("socket");
1131
849
goto mandos_end;
1132
850
}
1133
851
852
memset(&to, 0, sizeof(to));
1134
853
if(af == AF_INET6){
1135
struct sockaddr_in6 *to6 = (struct sockaddr_in6 *)&to;
1136
*to6 = (struct sockaddr_in6){ .sin6_family = (sa_family_t)af };
1137
ret = inet_pton(af, ip, &to6->sin6_addr);
854
((struct sockaddr_in6 *)&to)->sin6_family = (sa_family_t)af;
855
ret = inet_pton(af, ip, &((struct sockaddr_in6 *)&to)->sin6_addr);
1138
856
} else { /* IPv4 */
1139
struct sockaddr_in *to4 = (struct sockaddr_in *)&to;
1140
*to4 = (struct sockaddr_in){ .sin_family = (sa_family_t)af };
1141
ret = inet_pton(af, ip, &to4->sin_addr);
857
((struct sockaddr_in *)&to)->sin_family = (sa_family_t)af;
858
ret = inet_pton(af, ip, &((struct sockaddr_in *)&to)->sin_addr);
1142
859
}
1143
860
if(ret < 0 ){
1144
861
int e = errno;
1214
931
goto mandos_end;
1215
932
}
1216
933
1217
while(true){
1218
if(af == AF_INET6){
1219
ret = connect(tcp_sd, (struct sockaddr *)&to,
1220
sizeof(struct sockaddr_in6));
1221
} else {
1222
ret = connect(tcp_sd, (struct sockaddr *)&to, /* IPv4 */
1223
sizeof(struct sockaddr_in));
1224
}
1225
if(ret < 0){
1226
if(((errno == ENETUNREACH) or (errno == EHOSTUNREACH))
1227
and if_index != AVAHI_IF_UNSPEC
1228
and connect_to == NULL
1229
and not route_added and
1230
((af == AF_INET6 and not
1231
IN6_IS_ADDR_LINKLOCAL(&(((struct sockaddr_in6 *)
1232
&to)->sin6_addr)))
1233
or (af == AF_INET and
1234
/* Not a a IPv4LL address */
1235
(ntohl(((struct sockaddr_in *)&to)->sin_addr.s_addr)
1236
& 0xFFFF0000L) != 0xA9FE0000L))){
1237
/* Work around Avahi bug - Avahi does not announce link-local
1238
addresses if it has a global address, so local hosts with
1239
*only* a link-local address (e.g. Mandos clients) cannot
1240
connect to a Mandos server announced by Avahi on a server
1241
host with a global address. Work around this by retrying
1242
with an explicit route added with the server's address.
1243
1244
Avahi bug reference:
1245
https://lists.freedesktop.org/archives/avahi/2010-February/001833.html
1246
https://bugs.debian.org/587961
1247
*/
1248
if(debug){
1249
fprintf_plus(stderr, "Mandos server unreachable, trying"
1250
" direct route\n");
1251
}
1252
int e = errno;
1253
route_added = add_local_route(ip, if_index);
1254
if(route_added){
1255
continue;
1256
}
1257
errno = e;
1258
}
1259
if(errno != ECONNREFUSED or debug){
1260
int e = errno;
1261
perror_plus("connect");
1262
errno = e;
1263
}
1264
goto mandos_end;
1265
}
1266
1267
if(quit_now){
1268
errno = EINTR;
1269
goto mandos_end;
1270
}
1271
break;
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;
1272
953
}
1273
954
1274
955
const char *out = mandos_protocol_version;
1428
1109
&decrypted_buffer, mc);
1429
1110
if(decrypted_buffer_size >= 0){
1430
1111
1431
clearerr(stdout);
1432
1112
written = 0;
1433
1113
while(written < (size_t) decrypted_buffer_size){
1434
1114
if(quit_now){
1450
1130
}
1451
1131
written += (size_t)ret;
1452
1132
}
1453
ret = fflush(stdout);
1454
if(ret != 0){
1455
int e = errno;
1456
if(debug){
1457
fprintf_plus(stderr, "Error writing encrypted data: %s\n",
1458
strerror(errno));
1459
}
1460
errno = e;
1461
goto mandos_end;
1462
}
1463
1133
retval = 0;
1464
1134
}
1465
1135
}
1468
1138
1469
1139
mandos_end:
1470
1140
{
1471
if(route_added){
1472
if(not delete_local_route(ip, if_index)){
1473
fprintf_plus(stderr, "Failed to delete local route to %s on"
1474
" interface %d", ip, if_index);
1475
}
1476
}
1477
1141
int e = errno;
1478
1142
free(decrypted_buffer);
1479
1143
free(buffer);
1480
1144
if(tcp_sd >= 0){
1481
ret = close(tcp_sd);
1145
ret = (int)TEMP_FAILURE_RETRY(close(tcp_sd));
1482
1146
}
1483
1147
if(ret == -1){
1484
1148
if(e == 0){
1496
1160
return retval;
1497
1161
}
1498
1162
1163
__attribute__((nonnull))
1499
1164
static void resolve_callback(AvahiSServiceResolver *r,
1500
1165
AvahiIfIndex interface,
1501
1166
AvahiProtocol proto,
1638
1303
__attribute__((nonnull, warn_unused_result))
1639
1304
bool get_flags(const char *ifname, struct ifreq *ifr){
1640
1305
int ret;
1641
int old_errno;
1306
error_t ret_errno;
1642
1307
1643
1308
int s = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1644
1309
if(s < 0){
1645
old_errno = errno;
1310
ret_errno = errno;
1646
1311
perror_plus("socket");
1647
errno = old_errno;
1312
errno = ret_errno;
1648
1313
return false;
1649
1314
}
1650
strncpy(ifr->ifr_name, ifname, IF_NAMESIZE);
1651
ifr->ifr_name[IF_NAMESIZE-1] = '\0'; /* NUL terminate */
1315
strcpy(ifr->ifr_name, ifname);
1652
1316
ret = ioctl(s, SIOCGIFFLAGS, ifr);
1653
1317
if(ret == -1){
1654
1318
if(debug){
1655
old_errno = errno;
1319
ret_errno = errno;
1656
1320
perror_plus("ioctl SIOCGIFFLAGS");
1657
errno = old_errno;
1321
errno = ret_errno;
1658
1322
}
1659
close(s);
1660
1323
return false;
1661
1324
}
1662
close(s);
1663
1325
return true;
1664
1326
}
1665
1327
1907
1569
}
1908
1570
}
1909
1571
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
1910
1624
__attribute__((nonnull))
1911
1625
void run_network_hooks(const char *mode, const char *interface,
1912
1626
const float delay){
1913
1627
struct dirent **direntries = NULL;
1914
1628
if(hookdir_fd == -1){
1915
hookdir_fd = open(hookdir, O_RDONLY | O_DIRECTORY | O_PATH
1916
| O_CLOEXEC);
1629
hookdir_fd = open(hookdir, O_RDONLY);
1917
1630
if(hookdir_fd == -1){
1918
1631
if(errno == ENOENT){
1919
1632
if(debug){
1926
1639
return;
1927
1640
}
1928
1641
}
1929
int devnull = (int)TEMP_FAILURE_RETRY(open("/dev/null", O_RDONLY));
1930
if(devnull == -1){
1931
perror_plus("open(\"/dev/null\", O_RDONLY)");
1932
return;
1933
}
1642
#ifdef __GLIBC__
1643
#if __GLIBC_PREREQ(2, 15)
1934
1644
int numhooks = scandirat(hookdir_fd, ".", &direntries,
1935
1645
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__ */
1936
1654
if(numhooks == -1){
1937
1655
perror_plus("scandir");
1938
close(devnull);
1939
1656
return;
1940
1657
}
1941
1658
struct dirent *direntry;
1942
1659
int ret;
1660
int devnull = open("/dev/null", O_RDONLY);
1943
1661
for(int i = 0; i < numhooks; i++){
1944
1662
direntry = direntries[i];
1945
1663
if(debug){
1969
1687
perror_plus("setgroups");
1970
1688
_exit(EX_NOPERM);
1971
1689
}
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
}
1972
1705
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1973
1706
if(ret == -1){
1974
1707
perror_plus("setenv");
2009
1742
_exit(EX_OSERR);
2010
1743
}
2011
1744
}
2012
int hook_fd = (int)TEMP_FAILURE_RETRY(openat(hookdir_fd,
2013
direntry->d_name,
2014
O_RDONLY));
1745
int hook_fd = openat(hookdir_fd, direntry->d_name, O_RDONLY);
2015
1746
if(hook_fd == -1){
2016
1747
perror_plus("openat");
2017
1748
_exit(EXIT_FAILURE);
2018
1749
}
2019
if(close(hookdir_fd) == -1){
1750
if((int)TEMP_FAILURE_RETRY(close(hookdir_fd)) == -1){
2020
1751
perror_plus("close");
2021
1752
_exit(EXIT_FAILURE);
2022
1753
}
2023
ret = dup2(devnull, STDIN_FILENO);
2024
if(ret == -1){
2025
perror_plus("dup2(devnull, STDIN_FILENO)");
2026
_exit(EX_OSERR);
2027
}
2028
ret = close(devnull);
2029
if(ret == -1){
2030
perror_plus("close");
2031
_exit(EX_OSERR);
2032
}
2033
ret = dup2(STDERR_FILENO, STDOUT_FILENO);
2034
if(ret == -1){
2035
perror_plus("dup2(STDERR_FILENO, STDOUT_FILENO)");
2036
_exit(EX_OSERR);
2037
}
2038
1754
if(fexecve(hook_fd, (char *const []){ direntry->d_name, NULL },
2039
1755
environ) == -1){
2040
1756
perror_plus("fexecve");
2080
1796
free(direntry);
2081
1797
}
2082
1798
free(direntries);
2083
if(close(hookdir_fd) == -1){
1799
if((int)TEMP_FAILURE_RETRY(close(hookdir_fd)) == -1){
2084
1800
perror_plus("close");
2085
1801
} else {
2086
1802
hookdir_fd = -1;
2089
1805
}
2090
1806
2091
1807
__attribute__((nonnull, warn_unused_result))
2092
int bring_up_interface(const char *const interface,
2093
const float delay){
2094
int old_errno = errno;
1808
error_t bring_up_interface(const char *const interface,
1809
const float delay){
1810
error_t old_errno = errno;
2095
1811
int ret;
2096
1812
struct ifreq network;
2097
1813
unsigned int if_index = if_nametoindex(interface);
2107
1823
}
2108
1824
2109
1825
if(not interface_is_up(interface)){
2110
int ret_errno = 0;
2111
int ioctl_errno = 0;
1826
error_t ret_errno = 0, ioctl_errno = 0;
2112
1827
if(not get_flags(interface, &network)){
2113
1828
ret_errno = errno;
2114
1829
fprintf_plus(stderr, "Failed to get flags for interface "
2127
1842
}
2128
1843
2129
1844
if(quit_now){
2130
ret = close(sd);
1845
ret = (int)TEMP_FAILURE_RETRY(close(sd));
2131
1846
if(ret == -1){
2132
1847
perror_plus("close");
2133
1848
}
2183
1898
}
2184
1899
2185
1900
/* Close the socket */
2186
ret = close(sd);
1901
ret = (int)TEMP_FAILURE_RETRY(close(sd));
2187
1902
if(ret == -1){
2188
1903
perror_plus("close");
2189
1904
}
2201
1916
2202
1917
/* Sleep checking until interface is running.
2203
1918
Check every 0.25s, up to total time of delay */
2204
for(int i = 0; i < delay * 4; i++){
1919
for(int i=0; i < delay * 4; i++){
2205
1920
if(interface_is_running(interface)){
2206
1921
break;
2207
1922
}
2217
1932
}
2218
1933
2219
1934
__attribute__((nonnull, warn_unused_result))
2220
int take_down_interface(const char *const interface){
2221
int old_errno = errno;
1935
error_t take_down_interface(const char *const interface){
1936
error_t old_errno = errno;
2222
1937
struct ifreq network;
2223
1938
unsigned int if_index = if_nametoindex(interface);
2224
1939
if(if_index == 0){
2227
1942
return ENXIO;
2228
1943
}
2229
1944
if(interface_is_up(interface)){
2230
int ret_errno = 0;
2231
int ioctl_errno = 0;
1945
error_t ret_errno = 0, ioctl_errno = 0;
2232
1946
if(not get_flags(interface, &network) and debug){
2233
1947
ret_errno = errno;
2234
1948
fprintf_plus(stderr, "Failed to get flags for interface "
2272
1986
}
2273
1987
2274
1988
/* Close the socket */
2275
int ret = close(sd);
1989
int ret = (int)TEMP_FAILURE_RETRY(close(sd));
2276
1990
if(ret == -1){
2277
1991
perror_plus("close");
2278
1992
}
2294
2008
2295
2009
int main(int argc, char *argv[]){
2296
2010
mandos_context mc = { .server = NULL, .dh_bits = 0,
2297
.priority = "SECURE256:!CTYPE-X.509"
2298
":+CTYPE-OPENPGP:!RSA:+SIGN-DSA-SHA256",
2299
.current_server = NULL, .interfaces = NULL,
2300
.interfaces_size = 0 };
2011
.priority = "SECURE256:!CTYPE-X.509:"
2012
"+CTYPE-OPENPGP:!RSA", .current_server = NULL,
2013
.interfaces = NULL, .interfaces_size = 0 };
2301
2014
AvahiSServiceBrowser *sb = NULL;
2302
2015
error_t ret_errno;
2303
2016
int ret;
2312
2025
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
2313
2026
const char *seckey = PATHDIR "/" SECKEY;
2314
2027
const char *pubkey = PATHDIR "/" PUBKEY;
2315
const char *dh_params_file = NULL;
2316
2028
char *interfaces_hooks = NULL;
2317
2029
2318
2030
bool gnutls_initialized = false;
2371
2083
.doc = "Bit length of the prime number used in the"
2372
2084
" Diffie-Hellman key exchange",
2373
2085
.group = 2 },
2374
{ .name = "dh-params", .key = 134,
2375
.arg = "FILE",
2376
.doc = "PEM-encoded PKCS#3 file with pre-generated parameters"
2377
" for the Diffie-Hellman key exchange",
2378
.group = 2 },
2379
2086
{ .name = "priority", .key = 130,
2380
2087
.arg = "STRING",
2381
2088
.doc = "GnuTLS priority string for the TLS handshake",
2436
2143
}
2437
2144
mc.dh_bits = (typeof(mc.dh_bits))tmpmax;
2438
2145
break;
2439
case 134: /* --dh-params */
2440
dh_params_file = arg;
2441
break;
2442
2146
case 130: /* --priority */
2443
2147
mc.priority = arg;
2444
2148
break;
2484
2188
.args_doc = "",
2485
2189
.doc = "Mandos client -- Get and decrypt"
2486
2190
" passwords from a Mandos server" };
2487
ret_errno = argp_parse(&argp, argc, argv,
2488
ARGP_IN_ORDER | ARGP_NO_HELP, 0, NULL);
2489
switch(ret_errno){
2191
ret = argp_parse(&argp, argc, argv,
2192
ARGP_IN_ORDER | ARGP_NO_HELP, 0, NULL);
2193
switch(ret){
2490
2194
case 0:
2491
2195
break;
2492
2196
case ENOMEM:
2493
2197
default:
2494
errno = ret_errno;
2198
errno = ret;
2495
2199
perror_plus("argp_parse");
2496
2200
exitcode = EX_OSERR;
2497
2201
goto end;
2500
2204
goto end;
2501
2205
}
2502
2206
}
2503
2207
2504
2208
{
2505
2209
/* Work around Debian bug #633582:
2506
<https://bugs.debian.org/633582> */
2210
<http://bugs.debian.org/633582> */
2507
2211
2508
2212
/* Re-raise privileges */
2509
ret = raise_privileges();
2510
if(ret != 0){
2511
errno = ret;
2213
ret_errno = raise_privileges();
2214
if(ret_errno != 0){
2215
errno = ret_errno;
2512
2216
perror_plus("Failed to raise privileges");
2513
2217
} else {
2514
2218
struct stat st;
2530
2234
}
2531
2235
}
2532
2236
}
2533
close(seckey_fd);
2237
TEMP_FAILURE_RETRY(close(seckey_fd));
2534
2238
}
2535
2239
}
2536
2240
2537
2241
if(strcmp(pubkey, PATHDIR "/" PUBKEY) == 0){
2538
2242
int pubkey_fd = open(pubkey, O_RDONLY);
2539
2243
if(pubkey_fd == -1){
2551
2255
}
2552
2256
}
2553
2257
}
2554
close(pubkey_fd);
2555
}
2556
}
2557
2558
if(dh_params_file != NULL
2559
and strcmp(dh_params_file, PATHDIR "/dhparams.pem" ) == 0){
2560
int dhparams_fd = open(dh_params_file, O_RDONLY);
2561
if(dhparams_fd == -1){
2562
perror_plus("open");
2563
} else {
2564
ret = (int)TEMP_FAILURE_RETRY(fstat(dhparams_fd, &st));
2565
if(ret == -1){
2566
perror_plus("fstat");
2567
} else {
2568
if(S_ISREG(st.st_mode)
2569
and st.st_uid == 0 and st.st_gid == 0){
2570
ret = fchown(dhparams_fd, uid, gid);
2571
if(ret == -1){
2572
perror_plus("fchown");
2573
}
2574
}
2575
}
2576
close(dhparams_fd);
2577
}
2578
}
2579
2258
TEMP_FAILURE_RETRY(close(pubkey_fd));
2259
}
2260
}
2261
2580
2262
/* Lower privileges */
2581
ret = lower_privileges();
2582
if(ret != 0){
2583
errno = ret;
2263
ret_errno = lower_privileges();
2264
if(ret_errno != 0){
2265
errno = ret_errno;
2584
2266
perror_plus("Failed to lower privileges");
2585
2267
}
2586
2268
}
2756
2438
errno = bring_up_interface(interface, delay);
2757
2439
if(not interface_was_up){
2758
2440
if(errno != 0){
2759
fprintf_plus(stderr, "Failed to bring up interface \"%s\":"
2760
" %s\n", interface, strerror(errno));
2441
perror_plus("Failed to bring up interface");
2761
2442
} else {
2762
2443
errno = argz_add(&interfaces_to_take_down,
2763
2444
&interfaces_to_take_down_size,
2786
2467
goto end;
2787
2468
}
2788
2469
2789
ret = init_gnutls_global(pubkey, seckey, dh_params_file, &mc);
2470
ret = init_gnutls_global(pubkey, seckey, &mc);
2790
2471
if(ret == -1){
2791
2472
fprintf_plus(stderr, "init_gnutls_global failed\n");
2792
2473
exitcode = EX_UNAVAILABLE;
2914
2595
2915
2596
/* Allocate a new server */
2916
2597
mc.server = avahi_server_new(avahi_simple_poll_get(simple_poll),
2917
&config, NULL, NULL, &ret);
2598
&config, NULL, NULL, &ret_errno);
2918
2599
2919
2600
/* Free the Avahi configuration data */
2920
2601
avahi_server_config_free(&config);
2923
2604
/* Check if creating the Avahi server object succeeded */
2924
2605
if(mc.server == NULL){
2925
2606
fprintf_plus(stderr, "Failed to create Avahi server: %s\n",
2926
avahi_strerror(ret));
2607
avahi_strerror(ret_errno));
2927
2608
exitcode = EX_UNAVAILABLE;
2928
2609
goto end;
2929
2610
}
2964
2645
end:
2965
2646
2966
2647
if(debug){
2967
if(signal_received){
2968
fprintf_plus(stderr, "%s exiting due to signal %d: %s\n",
2969
argv[0], signal_received,
2970
strsignal(signal_received));
2971
} else {
2972
fprintf_plus(stderr, "%s exiting\n", argv[0]);
2973
}
2648
fprintf_plus(stderr, "%s exiting\n", argv[0]);
2974
2649
}
2975
2650
2976
2651
/* Cleanup things */
2987
2662
2988
2663
if(gnutls_initialized){
2989
2664
gnutls_certificate_free_credentials(mc.cred);
2665
gnutls_global_deinit();
2990
2666
gnutls_dh_params_deinit(mc.dh_params);
2991
2667
}
2992
2668
3015
2691
3016
2692
/* Re-raise privileges */
3017
2693
{
3018
ret = raise_privileges();
3019
if(ret != 0){
3020
errno = ret;
2694
ret_errno = raise_privileges();
2695
if(ret_errno != 0){
2696
errno = ret_errno;
3021
2697
perror_plus("Failed to raise privileges");
3022
2698
} else {
3023
2699
3028
2704
/* Take down the network interfaces which were brought up */
3029
2705
{
3030
2706
char *interface = NULL;
3031
while((interface = argz_next(interfaces_to_take_down,
3032
interfaces_to_take_down_size,
3033
interface))){
3034
ret = take_down_interface(interface);
3035
if(ret != 0){
3036
errno = ret;
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;
3037
2713
perror_plus("Failed to take down interface");
3038
2714
}
3039
2715
}
3044
2720
}
3045
2721
}
3046
2722
3047
ret = lower_privileges_permanently();
3048
if(ret != 0){
3049
errno = ret;
2723
ret_errno = lower_privileges_permanently();
2724
if(ret_errno != 0){
2725
errno = ret_errno;
3050
2726
perror_plus("Failed to lower privileges permanently");
3051
2727
}
3052
2728
}
3054
2730
free(interfaces_to_take_down);
3055
2731
free(interfaces_hooks);
3056
2732
3057
void clean_dir_at(int base, const char * const dirname,
3058
uintmax_t level){
3059
struct dirent **direntries = NULL;
3060
int dret;
3061
int dir_fd = (int)TEMP_FAILURE_RETRY(openat(base, dirname,
3062
O_RDONLY
3063
| O_NOFOLLOW
3064
| O_DIRECTORY
3065
| O_PATH));
3066
if(dir_fd == -1){
3067
perror_plus("open");
3068
return;
3069
}
3070
int numentries = scandirat(dir_fd, ".", &direntries,
3071
notdotentries, alphasort);
3072
if(numentries >= 0){
3073
for(int i = 0; i < numentries; i++){
3074
if(debug){
3075
fprintf_plus(stderr, "Unlinking \"%s/%s\"\n",
3076
dirname, direntries[i]->d_name);
3077
}
3078
dret = unlinkat(dir_fd, direntries[i]->d_name, 0);
3079
if(dret == -1){
3080
if(errno == EISDIR){
3081
dret = unlinkat(dir_fd, direntries[i]->d_name,
3082
AT_REMOVEDIR);
3083
}
3084
if((dret == -1) and (errno == ENOTEMPTY)
3085
and (strcmp(direntries[i]->d_name, "private-keys-v1.d")
3086
== 0) and (level == 0)){
3087
/* Recurse only in this special case */
3088
clean_dir_at(dir_fd, direntries[i]->d_name, level+1);
3089
dret = 0;
3090
}
3091
if((dret == -1) and (errno != ENOENT)){
3092
fprintf_plus(stderr, "unlink(\"%s/%s\"): %s\n", dirname,
3093
direntries[i]->d_name, strerror(errno));
3094
}
3095
}
3096
free(direntries[i]);
3097
}
3098
3099
/* need to clean even if 0 because man page doesn't specify */
3100
free(direntries);
3101
dret = unlinkat(base, dirname, AT_REMOVEDIR);
3102
if(dret == -1 and errno != ENOENT){
3103
perror_plus("rmdir");
3104
}
3105
} else {
3106
perror_plus("scandirat");
3107
}
3108
close(dir_fd);
3109
}
3110
3111
2733
/* Removes the GPGME temp directory and all files inside */
3112
2734
if(tempdir != NULL){
3113
clean_dir_at(-1, tempdir, 0);
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
}
3114
2776
}
3115
2777
3116
2778
if(quit_now){
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