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- Committer: Teddy Hogeborn
- Date: 2018-02-22 18:50:12 UTC
- Revision ID: teddy@recompile.se-20180222185012-etchk537ast7s1xg
Tags: version-1.7.19-1
* Makefile (version): Change to 1.7.19.
* NEWS (Version 1.7.19): Add new entry.
* debian/changelog (1.7.19-1): - '' -
* NEWS (Version 1.7.19): Add new entry.
* debian/changelog (1.7.19-1): - '' -
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,
607
613
}
608
614
params.size += (unsigned int)bytes_read;
609
615
}
616
ret = close(dhpfile);
617
if(ret == -1){
618
perror_plus("close");
619
}
610
620
if(params.data == NULL){
611
621
dhparamsfilename = NULL;
612
622
}
621
631
safer_gnutls_strerror(ret));
622
632
dhparamsfilename = NULL;
623
633
}
634
free(params.data);
624
635
} while(false);
625
636
}
626
637
if(dhparamsfilename == NULL){
813
824
814
825
/* Set effective uid to 0, return errno */
815
826
__attribute__((warn_unused_result))
816
error_t raise_privileges(void){
817
error_t old_errno = errno;
818
error_t ret_errno = 0;
827
int raise_privileges(void){
828
int old_errno = errno;
829
int ret = 0;
819
830
if(seteuid(0) == -1){
820
ret_errno = errno;
831
ret = errno;
821
832
}
822
833
errno = old_errno;
823
return ret_errno;
834
return ret;
824
835
}
825
836
826
837
/* Set effective and real user ID to 0. Return errno. */
827
838
__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){
839
int raise_privileges_permanently(void){
840
int old_errno = errno;
841
int ret = raise_privileges();
842
if(ret != 0){
832
843
errno = old_errno;
833
return ret_errno;
844
return ret;
834
845
}
835
846
if(setuid(0) == -1){
836
ret_errno = errno;
847
ret = errno;
837
848
}
838
849
errno = old_errno;
839
return ret_errno;
850
return ret;
840
851
}
841
852
842
853
/* Set effective user ID to unprivileged saved user ID */
843
854
__attribute__((warn_unused_result))
844
error_t lower_privileges(void){
845
error_t old_errno = errno;
846
error_t ret_errno = 0;
855
int lower_privileges(void){
856
int old_errno = errno;
857
int ret = 0;
847
858
if(seteuid(uid) == -1){
848
ret_errno = errno;
859
ret = errno;
849
860
}
850
861
errno = old_errno;
851
return ret_errno;
862
return ret;
852
863
}
853
864
854
865
/* Lower privileges permanently */
855
866
__attribute__((warn_unused_result))
856
error_t lower_privileges_permanently(void){
857
error_t old_errno = errno;
858
error_t ret_errno = 0;
867
int lower_privileges_permanently(void){
868
int old_errno = errno;
869
int ret = 0;
859
870
if(setuid(uid) == -1){
860
ret_errno = errno;
871
ret = errno;
861
872
}
862
873
errno = old_errno;
863
return ret_errno;
874
return ret;
864
875
}
865
876
866
877
/* Helper function to add_local_route() and delete_local_route() */
1073
1084
bool match = false;
1074
1085
{
1075
1086
char *interface = NULL;
1076
while((interface=argz_next(mc->interfaces, mc->interfaces_size,
1077
interface))){
1087
while((interface = argz_next(mc->interfaces,
1088
mc->interfaces_size,
1089
interface))){
1078
1090
if(if_nametoindex(interface) == (unsigned int)if_index){
1079
1091
match = true;
1080
1092
break;
1233
1245
with an explicit route added with the server's address.
1234
1246
1235
1247
Avahi bug reference:
1236
http://lists.freedesktop.org/archives/avahi/2010-February/001833.html
1248
https://lists.freedesktop.org/archives/avahi/2010-February/001833.html
1237
1249
https://bugs.debian.org/587961
1238
1250
*/
1239
1251
if(debug){
1419
1431
&decrypted_buffer, mc);
1420
1432
if(decrypted_buffer_size >= 0){
1421
1433
1434
clearerr(stdout);
1422
1435
written = 0;
1423
1436
while(written < (size_t) decrypted_buffer_size){
1424
1437
if(quit_now){
1440
1453
}
1441
1454
written += (size_t)ret;
1442
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
}
1443
1466
retval = 0;
1444
1467
}
1445
1468
}
1476
1499
return retval;
1477
1500
}
1478
1501
1479
__attribute__((nonnull))
1480
1502
static void resolve_callback(AvahiSServiceResolver *r,
1481
1503
AvahiIfIndex interface,
1482
1504
AvahiProtocol proto,
1619
1641
__attribute__((nonnull, warn_unused_result))
1620
1642
bool get_flags(const char *ifname, struct ifreq *ifr){
1621
1643
int ret;
1622
error_t ret_errno;
1644
int old_errno;
1623
1645
1624
1646
int s = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1625
1647
if(s < 0){
1626
ret_errno = errno;
1648
old_errno = errno;
1627
1649
perror_plus("socket");
1628
errno = ret_errno;
1650
errno = old_errno;
1629
1651
return false;
1630
1652
}
1631
1653
strncpy(ifr->ifr_name, ifname, IF_NAMESIZE);
1633
1655
ret = ioctl(s, SIOCGIFFLAGS, ifr);
1634
1656
if(ret == -1){
1635
1657
if(debug){
1636
ret_errno = errno;
1658
old_errno = errno;
1637
1659
perror_plus("ioctl SIOCGIFFLAGS");
1638
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;
1639
1666
}
1640
1667
return false;
1641
1668
}
1669
if((close(s) == -1) and debug){
1670
old_errno = errno;
1671
perror_plus("close");
1672
errno = old_errno;
1673
}
1642
1674
return true;
1643
1675
}
1644
1676
1905
1937
return;
1906
1938
}
1907
1939
}
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
}
1908
1945
int numhooks = scandirat(hookdir_fd, ".", &direntries,
1909
1946
runnable_hook, alphasort);
1910
1947
if(numhooks == -1){
1911
1948
perror_plus("scandir");
1949
close(devnull);
1912
1950
return;
1913
1951
}
1914
1952
struct dirent *direntry;
1915
1953
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
1954
for(int i = 0; i < numhooks; i++){
1922
1955
direntry = direntries[i];
1923
1956
if(debug){
2067
2100
}
2068
2101
2069
2102
__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;
2103
int bring_up_interface(const char *const interface,
2104
const float delay){
2105
int old_errno = errno;
2073
2106
int ret;
2074
2107
struct ifreq network;
2075
2108
unsigned int if_index = if_nametoindex(interface);
2085
2118
}
2086
2119
2087
2120
if(not interface_is_up(interface)){
2088
error_t ret_errno = 0, ioctl_errno = 0;
2121
int ret_errno = 0;
2122
int ioctl_errno = 0;
2089
2123
if(not get_flags(interface, &network)){
2090
2124
ret_errno = errno;
2091
2125
fprintf_plus(stderr, "Failed to get flags for interface "
2178
2212
2179
2213
/* Sleep checking until interface is running.
2180
2214
Check every 0.25s, up to total time of delay */
2181
for(int i=0; i < delay * 4; i++){
2215
for(int i = 0; i < delay * 4; i++){
2182
2216
if(interface_is_running(interface)){
2183
2217
break;
2184
2218
}
2194
2228
}
2195
2229
2196
2230
__attribute__((nonnull, warn_unused_result))
2197
error_t take_down_interface(const char *const interface){
2198
error_t old_errno = errno;
2231
int take_down_interface(const char *const interface){
2232
int old_errno = errno;
2199
2233
struct ifreq network;
2200
2234
unsigned int if_index = if_nametoindex(interface);
2201
2235
if(if_index == 0){
2204
2238
return ENXIO;
2205
2239
}
2206
2240
if(interface_is_up(interface)){
2207
error_t ret_errno = 0, ioctl_errno = 0;
2241
int ret_errno = 0;
2242
int ioctl_errno = 0;
2208
2243
if(not get_flags(interface, &network) and debug){
2209
2244
ret_errno = errno;
2210
2245
fprintf_plus(stderr, "Failed to get flags for interface "
2460
2495
.args_doc = "",
2461
2496
.doc = "Mandos client -- Get and decrypt"
2462
2497
" passwords from a Mandos server" };
2463
ret = argp_parse(&argp, argc, argv,
2464
ARGP_IN_ORDER | ARGP_NO_HELP, 0, NULL);
2465
switch(ret){
2498
ret_errno = argp_parse(&argp, argc, argv,
2499
ARGP_IN_ORDER | ARGP_NO_HELP, 0, NULL);
2500
switch(ret_errno){
2466
2501
case 0:
2467
2502
break;
2468
2503
case ENOMEM:
2469
2504
default:
2470
errno = ret;
2505
errno = ret_errno;
2471
2506
perror_plus("argp_parse");
2472
2507
exitcode = EX_OSERR;
2473
2508
goto end;
2479
2514
2480
2515
{
2481
2516
/* Work around Debian bug #633582:
2482
<http://bugs.debian.org/633582> */
2517
<https://bugs.debian.org/633582> */
2483
2518
2484
2519
/* Re-raise privileges */
2485
ret_errno = raise_privileges();
2486
if(ret_errno != 0){
2487
errno = ret_errno;
2520
ret = raise_privileges();
2521
if(ret != 0){
2522
errno = ret;
2488
2523
perror_plus("Failed to raise privileges");
2489
2524
} else {
2490
2525
struct stat st;
2554
2589
}
2555
2590
2556
2591
/* Lower privileges */
2557
ret_errno = lower_privileges();
2558
if(ret_errno != 0){
2559
errno = ret_errno;
2592
ret = lower_privileges();
2593
if(ret != 0){
2594
errno = ret;
2560
2595
perror_plus("Failed to lower privileges");
2561
2596
}
2562
2597
}
2890
2925
2891
2926
/* Allocate a new server */
2892
2927
mc.server = avahi_server_new(avahi_simple_poll_get(simple_poll),
2893
&config, NULL, NULL, &ret_errno);
2928
&config, NULL, NULL, &ret);
2894
2929
2895
2930
/* Free the Avahi configuration data */
2896
2931
avahi_server_config_free(&config);
2899
2934
/* Check if creating the Avahi server object succeeded */
2900
2935
if(mc.server == NULL){
2901
2936
fprintf_plus(stderr, "Failed to create Avahi server: %s\n",
2902
avahi_strerror(ret_errno));
2937
avahi_strerror(ret));
2903
2938
exitcode = EX_UNAVAILABLE;
2904
2939
goto end;
2905
2940
}
2940
2975
end:
2941
2976
2942
2977
if(debug){
2943
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
}
2944
2985
}
2945
2986
2946
2987
/* Cleanup things */
2985
3026
2986
3027
/* Re-raise privileges */
2987
3028
{
2988
ret_errno = raise_privileges();
2989
if(ret_errno != 0){
2990
errno = ret_errno;
3029
ret = raise_privileges();
3030
if(ret != 0){
3031
errno = ret;
2991
3032
perror_plus("Failed to raise privileges");
2992
3033
} else {
2993
3034
2998
3039
/* Take down the network interfaces which were brought up */
2999
3040
{
3000
3041
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;
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;
3007
3048
perror_plus("Failed to take down interface");
3008
3049
}
3009
3050
}
3014
3055
}
3015
3056
}
3016
3057
3017
ret_errno = lower_privileges_permanently();
3018
if(ret_errno != 0){
3019
errno = ret_errno;
3058
ret = lower_privileges_permanently();
3059
if(ret != 0){
3060
errno = ret;
3020
3061
perror_plus("Failed to lower privileges permanently");
3021
3062
}
3022
3063
}
3024
3065
free(interfaces_to_take_down);
3025
3066
free(interfaces_hooks);
3026
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
3027
3122
/* Removes the GPGME temp directory and all files inside */
3028
3123
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
}
3124
clean_dir_at(-1, tempdir, 0);
3062
3125
}
3063
3126
3064
3127
if(quit_now){
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0