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- Committer: Teddy Hogeborn
- Date: 2015-07-16 20:30:35 UTC
- Revision ID: teddy@recompile.se-20150716203035-z7qjwm270o2vrjah
Assume the C11 language (ISO 9899:2011), when compiling C code.
* Makefile (LANGUAGE): Changed to "-std=gnu11".
* Makefile (LANGUAGE): Changed to "-std=gnu11".
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 © 2008-2015 Teddy Hogeborn
13
* Copyright © 2008-2015 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
}
420
414
if(result == NULL){
421
415
fprintf_plus(stderr, "gpgme_op_decrypt_result failed\n");
422
416
} else {
423
if(result->unsupported_algorithm != NULL) {
424
fprintf_plus(stderr, "Unsupported algorithm: %s\n",
425
result->unsupported_algorithm);
426
}
417
fprintf_plus(stderr, "Unsupported algorithm: %s\n",
418
result->unsupported_algorithm);
427
419
fprintf_plus(stderr, "Wrong key usage: %u\n",
428
420
result->wrong_key_usage);
429
421
if(result->file_name != NULL){
521
513
fprintf_plus(stderr, "GnuTLS: %s", string);
522
514
}
523
515
524
__attribute__((nonnull(1, 2, 4), warn_unused_result))
516
__attribute__((nonnull, warn_unused_result))
525
517
static int init_gnutls_global(const char *pubkeyfilename,
526
518
const char *seckeyfilename,
527
519
const char *dhparamsfilename,
533
525
fprintf_plus(stderr, "Initializing GnuTLS\n");
534
526
}
535
527
528
ret = gnutls_global_init();
529
if(ret != GNUTLS_E_SUCCESS){
530
fprintf_plus(stderr, "GnuTLS global_init: %s\n",
531
safer_gnutls_strerror(ret));
532
return -1;
533
}
534
536
535
if(debug){
537
536
/* "Use a log level over 10 to enable all debugging options."
538
537
* - GnuTLS manual
546
545
if(ret != GNUTLS_E_SUCCESS){
547
546
fprintf_plus(stderr, "GnuTLS memory error: %s\n",
548
547
safer_gnutls_strerror(ret));
548
gnutls_global_deinit();
549
549
return -1;
550
550
}
551
551
615
615
}
616
616
params.size += (unsigned int)bytes_read;
617
617
}
618
ret = close(dhpfile);
619
if(ret == -1){
620
perror_plus("close");
621
}
622
618
if(params.data == NULL){
623
619
dhparamsfilename = NULL;
624
620
}
633
629
safer_gnutls_strerror(ret));
634
630
dhparamsfilename = NULL;
635
631
}
636
free(params.data);
637
632
} while(false);
638
633
}
639
634
if(dhparamsfilename == NULL){
760
755
globalfail:
761
756
762
757
gnutls_certificate_free_credentials(mc->cred);
758
gnutls_global_deinit();
763
759
gnutls_dh_params_deinit(mc->dh_params);
764
760
return -1;
765
761
}
826
822
827
823
/* Set effective uid to 0, return errno */
828
824
__attribute__((warn_unused_result))
829
int raise_privileges(void){
830
int old_errno = errno;
831
int ret = 0;
825
error_t raise_privileges(void){
826
error_t old_errno = errno;
827
error_t ret_errno = 0;
832
828
if(seteuid(0) == -1){
833
ret = errno;
829
ret_errno = errno;
834
830
}
835
831
errno = old_errno;
836
return ret;
832
return ret_errno;
837
833
}
838
834
839
835
/* Set effective and real user ID to 0. Return errno. */
840
836
__attribute__((warn_unused_result))
841
int raise_privileges_permanently(void){
842
int old_errno = errno;
843
int ret = raise_privileges();
844
if(ret != 0){
837
error_t raise_privileges_permanently(void){
838
error_t old_errno = errno;
839
error_t ret_errno = raise_privileges();
840
if(ret_errno != 0){
845
841
errno = old_errno;
846
return ret;
842
return ret_errno;
847
843
}
848
844
if(setuid(0) == -1){
849
ret = errno;
845
ret_errno = errno;
850
846
}
851
847
errno = old_errno;
852
return ret;
848
return ret_errno;
853
849
}
854
850
855
851
/* Set effective user ID to unprivileged saved user ID */
856
852
__attribute__((warn_unused_result))
857
int lower_privileges(void){
858
int old_errno = errno;
859
int ret = 0;
853
error_t lower_privileges(void){
854
error_t old_errno = errno;
855
error_t ret_errno = 0;
860
856
if(seteuid(uid) == -1){
861
ret = errno;
857
ret_errno = errno;
862
858
}
863
859
errno = old_errno;
864
return ret;
860
return ret_errno;
865
861
}
866
862
867
863
/* Lower privileges permanently */
868
864
__attribute__((warn_unused_result))
869
int lower_privileges_permanently(void){
870
int old_errno = errno;
871
int ret = 0;
865
error_t lower_privileges_permanently(void){
866
error_t old_errno = errno;
867
error_t ret_errno = 0;
872
868
if(setuid(uid) == -1){
873
ret = errno;
869
ret_errno = errno;
874
870
}
875
871
errno = old_errno;
876
return ret;
872
return ret_errno;
877
873
}
878
874
879
875
/* Helper function to add_local_route() and delete_local_route() */
935
931
perror_plus("dup2(devnull, STDIN_FILENO)");
936
932
_exit(EX_OSERR);
937
933
}
938
ret = close(devnull);
934
ret = (int)TEMP_FAILURE_RETRY(close(devnull));
939
935
if(ret == -1){
940
936
perror_plus("close");
941
937
_exit(EX_OSERR);
958
954
helper, O_RDONLY));
959
955
if(helper_fd == -1){
960
956
perror_plus("openat");
961
close(helperdir_fd);
962
957
_exit(EX_UNAVAILABLE);
963
958
}
964
close(helperdir_fd);
959
TEMP_FAILURE_RETRY(close(helperdir_fd));
965
960
#ifdef __GNUC__
966
961
#pragma GCC diagnostic push
967
962
#pragma GCC diagnostic ignored "-Wcast-qual"
1086
1081
bool match = false;
1087
1082
{
1088
1083
char *interface = NULL;
1089
while((interface = argz_next(mc->interfaces,
1090
mc->interfaces_size,
1091
interface))){
1084
while((interface=argz_next(mc->interfaces, mc->interfaces_size,
1085
interface))){
1092
1086
if(if_nametoindex(interface) == (unsigned int)if_index){
1093
1087
match = true;
1094
1088
break;
1136
1130
goto mandos_end;
1137
1131
}
1138
1132
1133
memset(&to, 0, sizeof(to));
1139
1134
if(af == AF_INET6){
1140
struct sockaddr_in6 *to6 = (struct sockaddr_in6 *)&to;
1141
*to6 = (struct sockaddr_in6){ .sin6_family = (sa_family_t)af };
1142
ret = inet_pton(af, ip, &to6->sin6_addr);
1135
((struct sockaddr_in6 *)&to)->sin6_family = (sa_family_t)af;
1136
ret = inet_pton(af, ip, &((struct sockaddr_in6 *)&to)->sin6_addr);
1143
1137
} else { /* IPv4 */
1144
struct sockaddr_in *to4 = (struct sockaddr_in *)&to;
1145
*to4 = (struct sockaddr_in){ .sin_family = (sa_family_t)af };
1146
ret = inet_pton(af, ip, &to4->sin_addr);
1138
((struct sockaddr_in *)&to)->sin_family = (sa_family_t)af;
1139
ret = inet_pton(af, ip, &((struct sockaddr_in *)&to)->sin_addr);
1147
1140
}
1148
1141
if(ret < 0 ){
1149
1142
int e = errno;
1228
1221
sizeof(struct sockaddr_in));
1229
1222
}
1230
1223
if(ret < 0){
1231
if(((errno == ENETUNREACH) or (errno == EHOSTUNREACH))
1224
if(errno == ENETUNREACH
1232
1225
and if_index != AVAHI_IF_UNSPEC
1233
1226
and connect_to == NULL
1234
1227
and not route_added and
1247
1240
with an explicit route added with the server's address.
1248
1241
1249
1242
Avahi bug reference:
1250
https://lists.freedesktop.org/archives/avahi/2010-February/001833.html
1243
http://lists.freedesktop.org/archives/avahi/2010-February/001833.html
1251
1244
https://bugs.debian.org/587961
1252
1245
*/
1253
1246
if(debug){
1433
1426
&decrypted_buffer, mc);
1434
1427
if(decrypted_buffer_size >= 0){
1435
1428
1436
clearerr(stdout);
1437
1429
written = 0;
1438
1430
while(written < (size_t) decrypted_buffer_size){
1439
1431
if(quit_now){
1455
1447
}
1456
1448
written += (size_t)ret;
1457
1449
}
1458
ret = fflush(stdout);
1459
if(ret != 0){
1460
int e = errno;
1461
if(debug){
1462
fprintf_plus(stderr, "Error writing encrypted data: %s\n",
1463
strerror(errno));
1464
}
1465
errno = e;
1466
goto mandos_end;
1467
}
1468
1450
retval = 0;
1469
1451
}
1470
1452
}
1483
1465
free(decrypted_buffer);
1484
1466
free(buffer);
1485
1467
if(tcp_sd >= 0){
1486
ret = close(tcp_sd);
1468
ret = (int)TEMP_FAILURE_RETRY(close(tcp_sd));
1487
1469
}
1488
1470
if(ret == -1){
1489
1471
if(e == 0){
1501
1483
return retval;
1502
1484
}
1503
1485
1486
__attribute__((nonnull))
1504
1487
static void resolve_callback(AvahiSServiceResolver *r,
1505
1488
AvahiIfIndex interface,
1506
1489
AvahiProtocol proto,
1643
1626
__attribute__((nonnull, warn_unused_result))
1644
1627
bool get_flags(const char *ifname, struct ifreq *ifr){
1645
1628
int ret;
1646
int old_errno;
1629
error_t ret_errno;
1647
1630
1648
1631
int s = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1649
1632
if(s < 0){
1650
old_errno = errno;
1633
ret_errno = errno;
1651
1634
perror_plus("socket");
1652
errno = old_errno;
1635
errno = ret_errno;
1653
1636
return false;
1654
1637
}
1655
strncpy(ifr->ifr_name, ifname, IF_NAMESIZE);
1656
ifr->ifr_name[IF_NAMESIZE-1] = '\0'; /* NUL terminate */
1638
strcpy(ifr->ifr_name, ifname);
1657
1639
ret = ioctl(s, SIOCGIFFLAGS, ifr);
1658
1640
if(ret == -1){
1659
1641
if(debug){
1660
old_errno = errno;
1642
ret_errno = errno;
1661
1643
perror_plus("ioctl SIOCGIFFLAGS");
1662
errno = old_errno;
1663
}
1664
if((close(s) == -1) and debug){
1665
old_errno = errno;
1666
perror_plus("close");
1667
errno = old_errno;
1644
errno = ret_errno;
1668
1645
}
1669
1646
return false;
1670
1647
}
1671
if((close(s) == -1) and debug){
1672
old_errno = errno;
1673
perror_plus("close");
1674
errno = old_errno;
1675
}
1676
1648
return true;
1677
1649
}
1678
1650
1939
1911
return;
1940
1912
}
1941
1913
}
1942
int devnull = (int)TEMP_FAILURE_RETRY(open("/dev/null", O_RDONLY));
1943
if(devnull == -1){
1944
perror_plus("open(\"/dev/null\", O_RDONLY)");
1945
return;
1946
}
1914
#ifdef __GLIBC__
1915
#if __GLIBC_PREREQ(2, 15)
1947
1916
int numhooks = scandirat(hookdir_fd, ".", &direntries,
1948
1917
runnable_hook, alphasort);
1918
#else /* not __GLIBC_PREREQ(2, 15) */
1919
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1920
alphasort);
1921
#endif /* not __GLIBC_PREREQ(2, 15) */
1922
#else /* not __GLIBC__ */
1923
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1924
alphasort);
1925
#endif /* not __GLIBC__ */
1949
1926
if(numhooks == -1){
1950
1927
perror_plus("scandir");
1951
close(devnull);
1952
1928
return;
1953
1929
}
1954
1930
struct dirent *direntry;
1955
1931
int ret;
1932
int devnull = (int)TEMP_FAILURE_RETRY(open("/dev/null", O_RDONLY));
1933
if(devnull == -1){
1934
perror_plus("open(\"/dev/null\", O_RDONLY)");
1935
return;
1936
}
1956
1937
for(int i = 0; i < numhooks; i++){
1957
1938
direntry = direntries[i];
1958
1939
if(debug){
2029
2010
perror_plus("openat");
2030
2011
_exit(EXIT_FAILURE);
2031
2012
}
2032
if(close(hookdir_fd) == -1){
2013
if((int)TEMP_FAILURE_RETRY(close(hookdir_fd)) == -1){
2033
2014
perror_plus("close");
2034
2015
_exit(EXIT_FAILURE);
2035
2016
}
2038
2019
perror_plus("dup2(devnull, STDIN_FILENO)");
2039
2020
_exit(EX_OSERR);
2040
2021
}
2041
ret = close(devnull);
2022
ret = (int)TEMP_FAILURE_RETRY(close(devnull));
2042
2023
if(ret == -1){
2043
2024
perror_plus("close");
2044
2025
_exit(EX_OSERR);
2093
2074
free(direntry);
2094
2075
}
2095
2076
free(direntries);
2096
if(close(hookdir_fd) == -1){
2077
if((int)TEMP_FAILURE_RETRY(close(hookdir_fd)) == -1){
2097
2078
perror_plus("close");
2098
2079
} else {
2099
2080
hookdir_fd = -1;
2102
2083
}
2103
2084
2104
2085
__attribute__((nonnull, warn_unused_result))
2105
int bring_up_interface(const char *const interface,
2106
const float delay){
2107
int old_errno = errno;
2086
error_t bring_up_interface(const char *const interface,
2087
const float delay){
2088
error_t old_errno = errno;
2108
2089
int ret;
2109
2090
struct ifreq network;
2110
2091
unsigned int if_index = if_nametoindex(interface);
2120
2101
}
2121
2102
2122
2103
if(not interface_is_up(interface)){
2123
int ret_errno = 0;
2124
int ioctl_errno = 0;
2104
error_t ret_errno = 0, ioctl_errno = 0;
2125
2105
if(not get_flags(interface, &network)){
2126
2106
ret_errno = errno;
2127
2107
fprintf_plus(stderr, "Failed to get flags for interface "
2140
2120
}
2141
2121
2142
2122
if(quit_now){
2143
ret = close(sd);
2123
ret = (int)TEMP_FAILURE_RETRY(close(sd));
2144
2124
if(ret == -1){
2145
2125
perror_plus("close");
2146
2126
}
2196
2176
}
2197
2177
2198
2178
/* Close the socket */
2199
ret = close(sd);
2179
ret = (int)TEMP_FAILURE_RETRY(close(sd));
2200
2180
if(ret == -1){
2201
2181
perror_plus("close");
2202
2182
}
2214
2194
2215
2195
/* Sleep checking until interface is running.
2216
2196
Check every 0.25s, up to total time of delay */
2217
for(int i = 0; i < delay * 4; i++){
2197
for(int i=0; i < delay * 4; i++){
2218
2198
if(interface_is_running(interface)){
2219
2199
break;
2220
2200
}
2230
2210
}
2231
2211
2232
2212
__attribute__((nonnull, warn_unused_result))
2233
int take_down_interface(const char *const interface){
2234
int old_errno = errno;
2213
error_t take_down_interface(const char *const interface){
2214
error_t old_errno = errno;
2235
2215
struct ifreq network;
2236
2216
unsigned int if_index = if_nametoindex(interface);
2237
2217
if(if_index == 0){
2240
2220
return ENXIO;
2241
2221
}
2242
2222
if(interface_is_up(interface)){
2243
int ret_errno = 0;
2244
int ioctl_errno = 0;
2223
error_t ret_errno = 0, ioctl_errno = 0;
2245
2224
if(not get_flags(interface, &network) and debug){
2246
2225
ret_errno = errno;
2247
2226
fprintf_plus(stderr, "Failed to get flags for interface "
2285
2264
}
2286
2265
2287
2266
/* Close the socket */
2288
int ret = close(sd);
2267
int ret = (int)TEMP_FAILURE_RETRY(close(sd));
2289
2268
if(ret == -1){
2290
2269
perror_plus("close");
2291
2270
}
2307
2286
2308
2287
int main(int argc, char *argv[]){
2309
2288
mandos_context mc = { .server = NULL, .dh_bits = 0,
2310
.priority = "SECURE256:!CTYPE-X.509"
2311
":+CTYPE-OPENPGP:!RSA:+SIGN-DSA-SHA256",
2312
.current_server = NULL, .interfaces = NULL,
2313
.interfaces_size = 0 };
2289
.priority = "SECURE256:!CTYPE-X.509:"
2290
"+CTYPE-OPENPGP:!RSA", .current_server = NULL,
2291
.interfaces = NULL, .interfaces_size = 0 };
2314
2292
AvahiSServiceBrowser *sb = NULL;
2315
2293
error_t ret_errno;
2316
2294
int ret;
2497
2475
.args_doc = "",
2498
2476
.doc = "Mandos client -- Get and decrypt"
2499
2477
" passwords from a Mandos server" };
2500
ret_errno = argp_parse(&argp, argc, argv,
2501
ARGP_IN_ORDER | ARGP_NO_HELP, 0, NULL);
2502
switch(ret_errno){
2478
ret = argp_parse(&argp, argc, argv,
2479
ARGP_IN_ORDER | ARGP_NO_HELP, 0, NULL);
2480
switch(ret){
2503
2481
case 0:
2504
2482
break;
2505
2483
case ENOMEM:
2506
2484
default:
2507
errno = ret_errno;
2485
errno = ret;
2508
2486
perror_plus("argp_parse");
2509
2487
exitcode = EX_OSERR;
2510
2488
goto end;
2516
2494
2517
2495
{
2518
2496
/* Work around Debian bug #633582:
2519
<https://bugs.debian.org/633582> */
2497
<http://bugs.debian.org/633582> */
2520
2498
2521
2499
/* Re-raise privileges */
2522
ret = raise_privileges();
2523
if(ret != 0){
2524
errno = ret;
2500
ret_errno = raise_privileges();
2501
if(ret_errno != 0){
2502
errno = ret_errno;
2525
2503
perror_plus("Failed to raise privileges");
2526
2504
} else {
2527
2505
struct stat st;
2543
2521
}
2544
2522
}
2545
2523
}
2546
close(seckey_fd);
2524
TEMP_FAILURE_RETRY(close(seckey_fd));
2547
2525
}
2548
2526
}
2549
2527
2564
2542
}
2565
2543
}
2566
2544
}
2567
close(pubkey_fd);
2545
TEMP_FAILURE_RETRY(close(pubkey_fd));
2568
2546
}
2569
2547
}
2570
2548
2571
if(dh_params_file != NULL
2572
and strcmp(dh_params_file, PATHDIR "/dhparams.pem" ) == 0){
2549
if(strcmp(dh_params_file, PATHDIR "/dhparams.pem" ) == 0){
2573
2550
int dhparams_fd = open(dh_params_file, O_RDONLY);
2574
2551
if(dhparams_fd == -1){
2575
2552
perror_plus("open");
2586
2563
}
2587
2564
}
2588
2565
}
2589
close(dhparams_fd);
2566
TEMP_FAILURE_RETRY(close(dhparams_fd));
2590
2567
}
2591
2568
}
2592
2569
2593
2570
/* Lower privileges */
2594
ret = lower_privileges();
2595
if(ret != 0){
2596
errno = ret;
2571
ret_errno = lower_privileges();
2572
if(ret_errno != 0){
2573
errno = ret_errno;
2597
2574
perror_plus("Failed to lower privileges");
2598
2575
}
2599
2576
}
2927
2904
2928
2905
/* Allocate a new server */
2929
2906
mc.server = avahi_server_new(avahi_simple_poll_get(simple_poll),
2930
&config, NULL, NULL, &ret);
2907
&config, NULL, NULL, &ret_errno);
2931
2908
2932
2909
/* Free the Avahi configuration data */
2933
2910
avahi_server_config_free(&config);
2936
2913
/* Check if creating the Avahi server object succeeded */
2937
2914
if(mc.server == NULL){
2938
2915
fprintf_plus(stderr, "Failed to create Avahi server: %s\n",
2939
avahi_strerror(ret));
2916
avahi_strerror(ret_errno));
2940
2917
exitcode = EX_UNAVAILABLE;
2941
2918
goto end;
2942
2919
}
2977
2954
end:
2978
2955
2979
2956
if(debug){
2980
if(signal_received){
2981
fprintf_plus(stderr, "%s exiting due to signal %d: %s\n",
2982
argv[0], signal_received,
2983
strsignal(signal_received));
2984
} else {
2985
fprintf_plus(stderr, "%s exiting\n", argv[0]);
2986
}
2957
fprintf_plus(stderr, "%s exiting\n", argv[0]);
2987
2958
}
2988
2959
2989
2960
/* Cleanup things */
3000
2971
3001
2972
if(gnutls_initialized){
3002
2973
gnutls_certificate_free_credentials(mc.cred);
2974
gnutls_global_deinit();
3003
2975
gnutls_dh_params_deinit(mc.dh_params);
3004
2976
}
3005
2977
3028
3000
3029
3001
/* Re-raise privileges */
3030
3002
{
3031
ret = raise_privileges();
3032
if(ret != 0){
3033
errno = ret;
3003
ret_errno = raise_privileges();
3004
if(ret_errno != 0){
3005
errno = ret_errno;
3034
3006
perror_plus("Failed to raise privileges");
3035
3007
} else {
3036
3008
3041
3013
/* Take down the network interfaces which were brought up */
3042
3014
{
3043
3015
char *interface = NULL;
3044
while((interface = argz_next(interfaces_to_take_down,
3045
interfaces_to_take_down_size,
3046
interface))){
3047
ret = take_down_interface(interface);
3048
if(ret != 0){
3049
errno = ret;
3016
while((interface=argz_next(interfaces_to_take_down,
3017
interfaces_to_take_down_size,
3018
interface))){
3019
ret_errno = take_down_interface(interface);
3020
if(ret_errno != 0){
3021
errno = ret_errno;
3050
3022
perror_plus("Failed to take down interface");
3051
3023
}
3052
3024
}
3057
3029
}
3058
3030
}
3059
3031
3060
ret = lower_privileges_permanently();
3061
if(ret != 0){
3062
errno = ret;
3032
ret_errno = lower_privileges_permanently();
3033
if(ret_errno != 0){
3034
errno = ret_errno;
3063
3035
perror_plus("Failed to lower privileges permanently");
3064
3036
}
3065
3037
}
3067
3039
free(interfaces_to_take_down);
3068
3040
free(interfaces_hooks);
3069
3041
3070
void clean_dir_at(int base, const char * const dirname,
3071
uintmax_t level){
3072
struct dirent **direntries = NULL;
3073
int dret;
3074
int dir_fd = (int)TEMP_FAILURE_RETRY(openat(base, dirname,
3075
O_RDONLY
3076
| O_NOFOLLOW
3077
| O_DIRECTORY
3078
| O_PATH));
3079
if(dir_fd == -1){
3080
perror_plus("open");
3081
return;
3082
}
3083
int numentries = scandirat(dir_fd, ".", &direntries,
3084
notdotentries, alphasort);
3085
if(numentries >= 0){
3086
for(int i = 0; i < numentries; i++){
3087
if(debug){
3088
fprintf_plus(stderr, "Unlinking \"%s/%s\"\n",
3089
dirname, direntries[i]->d_name);
3090
}
3091
dret = unlinkat(dir_fd, direntries[i]->d_name, 0);
3092
if(dret == -1){
3093
if(errno == EISDIR){
3094
dret = unlinkat(dir_fd, direntries[i]->d_name,
3095
AT_REMOVEDIR);
3096
}
3097
if((dret == -1) and (errno == ENOTEMPTY)
3098
and (strcmp(direntries[i]->d_name, "private-keys-v1.d")
3099
== 0) and (level == 0)){
3100
/* Recurse only in this special case */
3101
clean_dir_at(dir_fd, direntries[i]->d_name, level+1);
3102
dret = 0;
3103
}
3104
if((dret == -1) and (errno != ENOENT)){
3105
fprintf_plus(stderr, "unlink(\"%s/%s\"): %s\n", dirname,
3106
direntries[i]->d_name, strerror(errno));
3107
}
3108
}
3109
free(direntries[i]);
3110
}
3111
3112
/* need to clean even if 0 because man page doesn't specify */
3113
free(direntries);
3114
dret = unlinkat(base, dirname, AT_REMOVEDIR);
3115
if(dret == -1 and errno != ENOENT){
3116
perror_plus("rmdir");
3117
}
3118
} else {
3119
perror_plus("scandirat");
3120
}
3121
close(dir_fd);
3122
}
3123
3124
3042
/* Removes the GPGME temp directory and all files inside */
3125
3043
if(tempdir != NULL){
3126
clean_dir_at(-1, tempdir, 0);
3044
struct dirent **direntries = NULL;
3045
int tempdir_fd = (int)TEMP_FAILURE_RETRY(open(tempdir, O_RDONLY
3046
| O_NOFOLLOW
3047
| O_DIRECTORY
3048
| O_PATH));
3049
if(tempdir_fd == -1){
3050
perror_plus("open");
3051
} else {
3052
#ifdef __GLIBC__
3053
#if __GLIBC_PREREQ(2, 15)
3054
int numentries = scandirat(tempdir_fd, ".", &direntries,
3055
notdotentries, alphasort);
3056
#else /* not __GLIBC_PREREQ(2, 15) */
3057
int numentries = scandir(tempdir, &direntries, notdotentries,
3058
alphasort);
3059
#endif /* not __GLIBC_PREREQ(2, 15) */
3060
#else /* not __GLIBC__ */
3061
int numentries = scandir(tempdir, &direntries, notdotentries,
3062
alphasort);
3063
#endif /* not __GLIBC__ */
3064
if(numentries >= 0){
3065
for(int i = 0; i < numentries; i++){
3066
ret = unlinkat(tempdir_fd, direntries[i]->d_name, 0);
3067
if(ret == -1){
3068
fprintf_plus(stderr, "unlinkat(open(\"%s\", O_RDONLY),"
3069
" \"%s\", 0): %s\n", tempdir,
3070
direntries[i]->d_name, strerror(errno));
3071
}
3072
free(direntries[i]);
3073
}
3074
3075
/* need to clean even if 0 because man page doesn't specify */
3076
free(direntries);
3077
if(numentries == -1){
3078
perror_plus("scandir");
3079
}
3080
ret = rmdir(tempdir);
3081
if(ret == -1 and errno != ENOENT){
3082
perror_plus("rmdir");
3083
}
3084
}
3085
TEMP_FAILURE_RETRY(close(tempdir_fd));
3086
}
3127
3087
}
3128
3088
3129
3089
if(quit_now){
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