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- Committer: Teddy Hogeborn
- Date: 2018-02-18 01:29:21 UTC
- Revision ID: teddy@recompile.se-20180218012921-itiazxid50ycv77o
Correct comments
* plugin-helpers/mandos-client-iprouteadddel.c: Comment change only.
* plugin-helpers/mandos-client-iprouteadddel.c: Comment change only.
added
removed
plugins.d/mandos-client.c
9
9
* "browse_callback", and parts of "main".
10
10
*
11
11
* Everything else is
12
* Copyright © 2008-2016 Teddy Hogeborn
13
* Copyright © 2008-2016 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
*/
47
48
strtof(), abort() */
48
49
#include <stdbool.h> /* bool, false, true */
49
50
#include <string.h> /* strcmp(), strlen(), strerror(),
50
asprintf(), strncpy() */
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,
621
627
safer_gnutls_strerror(ret));
622
628
dhparamsfilename = NULL;
623
629
}
630
free(params.data);
624
631
} while(false);
625
632
}
626
633
if(dhparamsfilename == NULL){
813
820
814
821
/* Set effective uid to 0, return errno */
815
822
__attribute__((warn_unused_result))
816
error_t raise_privileges(void){
817
error_t old_errno = errno;
818
error_t ret_errno = 0;
823
int raise_privileges(void){
824
int old_errno = errno;
825
int ret = 0;
819
826
if(seteuid(0) == -1){
820
ret_errno = errno;
827
ret = errno;
821
828
}
822
829
errno = old_errno;
823
return ret_errno;
830
return ret;
824
831
}
825
832
826
833
/* Set effective and real user ID to 0. Return errno. */
827
834
__attribute__((warn_unused_result))
828
error_t raise_privileges_permanently(void){
829
error_t old_errno = errno;
830
error_t ret_errno = raise_privileges();
831
if(ret_errno != 0){
835
int raise_privileges_permanently(void){
836
int old_errno = errno;
837
int ret = raise_privileges();
838
if(ret != 0){
832
839
errno = old_errno;
833
return ret_errno;
840
return ret;
834
841
}
835
842
if(setuid(0) == -1){
836
ret_errno = errno;
843
ret = errno;
837
844
}
838
845
errno = old_errno;
839
return ret_errno;
846
return ret;
840
847
}
841
848
842
849
/* Set effective user ID to unprivileged saved user ID */
843
850
__attribute__((warn_unused_result))
844
error_t lower_privileges(void){
845
error_t old_errno = errno;
846
error_t ret_errno = 0;
851
int lower_privileges(void){
852
int old_errno = errno;
853
int ret = 0;
847
854
if(seteuid(uid) == -1){
848
ret_errno = errno;
855
ret = errno;
849
856
}
850
857
errno = old_errno;
851
return ret_errno;
858
return ret;
852
859
}
853
860
854
861
/* Lower privileges permanently */
855
862
__attribute__((warn_unused_result))
856
error_t lower_privileges_permanently(void){
857
error_t old_errno = errno;
858
error_t ret_errno = 0;
863
int lower_privileges_permanently(void){
864
int old_errno = errno;
865
int ret = 0;
859
866
if(setuid(uid) == -1){
860
ret_errno = errno;
867
ret = errno;
861
868
}
862
869
errno = old_errno;
863
return ret_errno;
870
return ret;
864
871
}
865
872
866
873
/* Helper function to add_local_route() and delete_local_route() */
1073
1080
bool match = false;
1074
1081
{
1075
1082
char *interface = NULL;
1076
while((interface=argz_next(mc->interfaces, mc->interfaces_size,
1077
interface))){
1083
while((interface = argz_next(mc->interfaces,
1084
mc->interfaces_size,
1085
interface))){
1078
1086
if(if_nametoindex(interface) == (unsigned int)if_index){
1079
1087
match = true;
1080
1088
break;
1233
1241
with an explicit route added with the server's address.
1234
1242
1235
1243
Avahi bug reference:
1236
http://lists.freedesktop.org/archives/avahi/2010-February/001833.html
1244
https://lists.freedesktop.org/archives/avahi/2010-February/001833.html
1237
1245
https://bugs.debian.org/587961
1238
1246
*/
1239
1247
if(debug){
1419
1427
&decrypted_buffer, mc);
1420
1428
if(decrypted_buffer_size >= 0){
1421
1429
1430
clearerr(stdout);
1422
1431
written = 0;
1423
1432
while(written < (size_t) decrypted_buffer_size){
1424
1433
if(quit_now){
1440
1449
}
1441
1450
written += (size_t)ret;
1442
1451
}
1452
ret = fflush(stdout);
1453
if(ret != 0){
1454
int e = errno;
1455
if(debug){
1456
fprintf_plus(stderr, "Error writing encrypted data: %s\n",
1457
strerror(errno));
1458
}
1459
errno = e;
1460
goto mandos_end;
1461
}
1443
1462
retval = 0;
1444
1463
}
1445
1464
}
1476
1495
return retval;
1477
1496
}
1478
1497
1479
__attribute__((nonnull))
1480
1498
static void resolve_callback(AvahiSServiceResolver *r,
1481
1499
AvahiIfIndex interface,
1482
1500
AvahiProtocol proto,
1619
1637
__attribute__((nonnull, warn_unused_result))
1620
1638
bool get_flags(const char *ifname, struct ifreq *ifr){
1621
1639
int ret;
1622
error_t ret_errno;
1640
int old_errno;
1623
1641
1624
1642
int s = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1625
1643
if(s < 0){
1626
ret_errno = errno;
1644
old_errno = errno;
1627
1645
perror_plus("socket");
1628
errno = ret_errno;
1646
errno = old_errno;
1629
1647
return false;
1630
1648
}
1631
1649
strncpy(ifr->ifr_name, ifname, IF_NAMESIZE);
1633
1651
ret = ioctl(s, SIOCGIFFLAGS, ifr);
1634
1652
if(ret == -1){
1635
1653
if(debug){
1636
ret_errno = errno;
1654
old_errno = errno;
1637
1655
perror_plus("ioctl SIOCGIFFLAGS");
1638
errno = ret_errno;
1656
errno = old_errno;
1639
1657
}
1640
1658
return false;
1641
1659
}
1905
1923
return;
1906
1924
}
1907
1925
}
1926
int devnull = (int)TEMP_FAILURE_RETRY(open("/dev/null", O_RDONLY));
1927
if(devnull == -1){
1928
perror_plus("open(\"/dev/null\", O_RDONLY)");
1929
return;
1930
}
1908
1931
int numhooks = scandirat(hookdir_fd, ".", &direntries,
1909
1932
runnable_hook, alphasort);
1910
1933
if(numhooks == -1){
1911
1934
perror_plus("scandir");
1935
close(devnull);
1912
1936
return;
1913
1937
}
1914
1938
struct dirent *direntry;
1915
1939
int ret;
1916
int devnull = (int)TEMP_FAILURE_RETRY(open("/dev/null", O_RDONLY));
1917
if(devnull == -1){
1918
perror_plus("open(\"/dev/null\", O_RDONLY)");
1919
return;
1920
}
1921
1940
for(int i = 0; i < numhooks; i++){
1922
1941
direntry = direntries[i];
1923
1942
if(debug){
2067
2086
}
2068
2087
2069
2088
__attribute__((nonnull, warn_unused_result))
2070
error_t bring_up_interface(const char *const interface,
2071
const float delay){
2072
error_t old_errno = errno;
2089
int bring_up_interface(const char *const interface,
2090
const float delay){
2091
int old_errno = errno;
2073
2092
int ret;
2074
2093
struct ifreq network;
2075
2094
unsigned int if_index = if_nametoindex(interface);
2085
2104
}
2086
2105
2087
2106
if(not interface_is_up(interface)){
2088
error_t ret_errno = 0, ioctl_errno = 0;
2107
int ret_errno = 0;
2108
int ioctl_errno = 0;
2089
2109
if(not get_flags(interface, &network)){
2090
2110
ret_errno = errno;
2091
2111
fprintf_plus(stderr, "Failed to get flags for interface "
2178
2198
2179
2199
/* Sleep checking until interface is running.
2180
2200
Check every 0.25s, up to total time of delay */
2181
for(int i=0; i < delay * 4; i++){
2201
for(int i = 0; i < delay * 4; i++){
2182
2202
if(interface_is_running(interface)){
2183
2203
break;
2184
2204
}
2194
2214
}
2195
2215
2196
2216
__attribute__((nonnull, warn_unused_result))
2197
error_t take_down_interface(const char *const interface){
2198
error_t old_errno = errno;
2217
int take_down_interface(const char *const interface){
2218
int old_errno = errno;
2199
2219
struct ifreq network;
2200
2220
unsigned int if_index = if_nametoindex(interface);
2201
2221
if(if_index == 0){
2204
2224
return ENXIO;
2205
2225
}
2206
2226
if(interface_is_up(interface)){
2207
error_t ret_errno = 0, ioctl_errno = 0;
2227
int ret_errno = 0;
2228
int ioctl_errno = 0;
2208
2229
if(not get_flags(interface, &network) and debug){
2209
2230
ret_errno = errno;
2210
2231
fprintf_plus(stderr, "Failed to get flags for interface "
2460
2481
.args_doc = "",
2461
2482
.doc = "Mandos client -- Get and decrypt"
2462
2483
" passwords from a Mandos server" };
2463
ret = argp_parse(&argp, argc, argv,
2464
ARGP_IN_ORDER | ARGP_NO_HELP, 0, NULL);
2465
switch(ret){
2484
ret_errno = argp_parse(&argp, argc, argv,
2485
ARGP_IN_ORDER | ARGP_NO_HELP, 0, NULL);
2486
switch(ret_errno){
2466
2487
case 0:
2467
2488
break;
2468
2489
case ENOMEM:
2469
2490
default:
2470
errno = ret;
2491
errno = ret_errno;
2471
2492
perror_plus("argp_parse");
2472
2493
exitcode = EX_OSERR;
2473
2494
goto end;
2479
2500
2480
2501
{
2481
2502
/* Work around Debian bug #633582:
2482
<http://bugs.debian.org/633582> */
2503
<https://bugs.debian.org/633582> */
2483
2504
2484
2505
/* Re-raise privileges */
2485
ret_errno = raise_privileges();
2486
if(ret_errno != 0){
2487
errno = ret_errno;
2506
ret = raise_privileges();
2507
if(ret != 0){
2508
errno = ret;
2488
2509
perror_plus("Failed to raise privileges");
2489
2510
} else {
2490
2511
struct stat st;
2554
2575
}
2555
2576
2556
2577
/* Lower privileges */
2557
ret_errno = lower_privileges();
2558
if(ret_errno != 0){
2559
errno = ret_errno;
2578
ret = lower_privileges();
2579
if(ret != 0){
2580
errno = ret;
2560
2581
perror_plus("Failed to lower privileges");
2561
2582
}
2562
2583
}
2890
2911
2891
2912
/* Allocate a new server */
2892
2913
mc.server = avahi_server_new(avahi_simple_poll_get(simple_poll),
2893
&config, NULL, NULL, &ret_errno);
2914
&config, NULL, NULL, &ret);
2894
2915
2895
2916
/* Free the Avahi configuration data */
2896
2917
avahi_server_config_free(&config);
2899
2920
/* Check if creating the Avahi server object succeeded */
2900
2921
if(mc.server == NULL){
2901
2922
fprintf_plus(stderr, "Failed to create Avahi server: %s\n",
2902
avahi_strerror(ret_errno));
2923
avahi_strerror(ret));
2903
2924
exitcode = EX_UNAVAILABLE;
2904
2925
goto end;
2905
2926
}
2940
2961
end:
2941
2962
2942
2963
if(debug){
2943
fprintf_plus(stderr, "%s exiting\n", argv[0]);
2964
if(signal_received){
2965
fprintf_plus(stderr, "%s exiting due to signal %d: %s\n",
2966
argv[0], signal_received,
2967
strsignal(signal_received));
2968
} else {
2969
fprintf_plus(stderr, "%s exiting\n", argv[0]);
2970
}
2944
2971
}
2945
2972
2946
2973
/* Cleanup things */
2985
3012
2986
3013
/* Re-raise privileges */
2987
3014
{
2988
ret_errno = raise_privileges();
2989
if(ret_errno != 0){
2990
errno = ret_errno;
3015
ret = raise_privileges();
3016
if(ret != 0){
3017
errno = ret;
2991
3018
perror_plus("Failed to raise privileges");
2992
3019
} else {
2993
3020
2998
3025
/* Take down the network interfaces which were brought up */
2999
3026
{
3000
3027
char *interface = NULL;
3001
while((interface=argz_next(interfaces_to_take_down,
3002
interfaces_to_take_down_size,
3003
interface))){
3004
ret_errno = take_down_interface(interface);
3005
if(ret_errno != 0){
3006
errno = ret_errno;
3028
while((interface = argz_next(interfaces_to_take_down,
3029
interfaces_to_take_down_size,
3030
interface))){
3031
ret = take_down_interface(interface);
3032
if(ret != 0){
3033
errno = ret;
3007
3034
perror_plus("Failed to take down interface");
3008
3035
}
3009
3036
}
3014
3041
}
3015
3042
}
3016
3043
3017
ret_errno = lower_privileges_permanently();
3018
if(ret_errno != 0){
3019
errno = ret_errno;
3044
ret = lower_privileges_permanently();
3045
if(ret != 0){
3046
errno = ret;
3020
3047
perror_plus("Failed to lower privileges permanently");
3021
3048
}
3022
3049
}
3024
3051
free(interfaces_to_take_down);
3025
3052
free(interfaces_hooks);
3026
3053
3054
void clean_dir_at(int base, const char * const dirname,
3055
uintmax_t level){
3056
struct dirent **direntries = NULL;
3057
int dret;
3058
int dir_fd = (int)TEMP_FAILURE_RETRY(openat(base, dirname,
3059
O_RDONLY
3060
| O_NOFOLLOW
3061
| O_DIRECTORY
3062
| O_PATH));
3063
if(dir_fd == -1){
3064
perror_plus("open");
3065
return;
3066
}
3067
int numentries = scandirat(dir_fd, ".", &direntries,
3068
notdotentries, alphasort);
3069
if(numentries >= 0){
3070
for(int i = 0; i < numentries; i++){
3071
if(debug){
3072
fprintf_plus(stderr, "Unlinking \"%s/%s\"\n",
3073
dirname, direntries[i]->d_name);
3074
}
3075
dret = unlinkat(dir_fd, direntries[i]->d_name, 0);
3076
if(dret == -1){
3077
if(errno == EISDIR){
3078
dret = unlinkat(dir_fd, direntries[i]->d_name,
3079
AT_REMOVEDIR);
3080
}
3081
if((dret == -1) and (errno == ENOTEMPTY)
3082
and (strcmp(direntries[i]->d_name, "private-keys-v1.d")
3083
== 0) and (level == 0)){
3084
/* Recurse only in this special case */
3085
clean_dir_at(dir_fd, direntries[i]->d_name, level+1);
3086
dret = 0;
3087
}
3088
if((dret == -1) and (errno != ENOENT)){
3089
fprintf_plus(stderr, "unlink(\"%s/%s\"): %s\n", dirname,
3090
direntries[i]->d_name, strerror(errno));
3091
}
3092
}
3093
free(direntries[i]);
3094
}
3095
3096
/* need to clean even if 0 because man page doesn't specify */
3097
free(direntries);
3098
dret = unlinkat(base, dirname, AT_REMOVEDIR);
3099
if(dret == -1 and errno != ENOENT){
3100
perror_plus("rmdir");
3101
}
3102
} else {
3103
perror_plus("scandirat");
3104
}
3105
close(dir_fd);
3106
}
3107
3027
3108
/* Removes the GPGME temp directory and all files inside */
3028
3109
if(tempdir != NULL){
3029
struct dirent **direntries = NULL;
3030
int tempdir_fd = (int)TEMP_FAILURE_RETRY(open(tempdir, O_RDONLY
3031
| O_NOFOLLOW
3032
| O_DIRECTORY
3033
| O_PATH));
3034
if(tempdir_fd == -1){
3035
perror_plus("open");
3036
} else {
3037
int numentries = scandirat(tempdir_fd, ".", &direntries,
3038
notdotentries, alphasort);
3039
if(numentries >= 0){
3040
for(int i = 0; i < numentries; i++){
3041
ret = unlinkat(tempdir_fd, direntries[i]->d_name, 0);
3042
if(ret == -1){
3043
fprintf_plus(stderr, "unlinkat(open(\"%s\", O_RDONLY),"
3044
" \"%s\", 0): %s\n", tempdir,
3045
direntries[i]->d_name, strerror(errno));
3046
}
3047
free(direntries[i]);
3048
}
3049
3050
/* need to clean even if 0 because man page doesn't specify */
3051
free(direntries);
3052
if(numentries == -1){
3053
perror_plus("scandir");
3054
}
3055
ret = rmdir(tempdir);
3056
if(ret == -1 and errno != ENOENT){
3057
perror_plus("rmdir");
3058
}
3059
}
3060
close(tempdir_fd);
3061
}
3110
clean_dir_at(-1, tempdir, 0);
3062
3111
}
3063
3112
3064
3113
if(quit_now){
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0