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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,
611
613
}
612
614
params.size += (unsigned int)bytes_read;
613
615
}
616
ret = close(dhpfile);
617
if(ret == -1){
618
perror_plus("close");
619
}
614
620
if(params.data == NULL){
615
621
dhparamsfilename = NULL;
616
622
}
625
631
safer_gnutls_strerror(ret));
626
632
dhparamsfilename = NULL;
627
633
}
634
free(params.data);
628
635
} while(false);
629
636
}
630
637
if(dhparamsfilename == NULL){
817
824
818
825
/* Set effective uid to 0, return errno */
819
826
__attribute__((warn_unused_result))
820
error_t raise_privileges(void){
821
error_t old_errno = errno;
822
error_t ret_errno = 0;
827
int raise_privileges(void){
828
int old_errno = errno;
829
int ret = 0;
823
830
if(seteuid(0) == -1){
824
ret_errno = errno;
831
ret = errno;
825
832
}
826
833
errno = old_errno;
827
return ret_errno;
834
return ret;
828
835
}
829
836
830
837
/* Set effective and real user ID to 0. Return errno. */
831
838
__attribute__((warn_unused_result))
832
error_t raise_privileges_permanently(void){
833
error_t old_errno = errno;
834
error_t ret_errno = raise_privileges();
835
if(ret_errno != 0){
839
int raise_privileges_permanently(void){
840
int old_errno = errno;
841
int ret = raise_privileges();
842
if(ret != 0){
836
843
errno = old_errno;
837
return ret_errno;
844
return ret;
838
845
}
839
846
if(setuid(0) == -1){
840
ret_errno = errno;
847
ret = errno;
841
848
}
842
849
errno = old_errno;
843
return ret_errno;
850
return ret;
844
851
}
845
852
846
853
/* Set effective user ID to unprivileged saved user ID */
847
854
__attribute__((warn_unused_result))
848
error_t lower_privileges(void){
849
error_t old_errno = errno;
850
error_t ret_errno = 0;
855
int lower_privileges(void){
856
int old_errno = errno;
857
int ret = 0;
851
858
if(seteuid(uid) == -1){
852
ret_errno = errno;
859
ret = errno;
853
860
}
854
861
errno = old_errno;
855
return ret_errno;
862
return ret;
856
863
}
857
864
858
865
/* Lower privileges permanently */
859
866
__attribute__((warn_unused_result))
860
error_t lower_privileges_permanently(void){
861
error_t old_errno = errno;
862
error_t ret_errno = 0;
867
int lower_privileges_permanently(void){
868
int old_errno = errno;
869
int ret = 0;
863
870
if(setuid(uid) == -1){
864
ret_errno = errno;
871
ret = errno;
865
872
}
866
873
errno = old_errno;
867
return ret_errno;
874
return ret;
868
875
}
869
876
870
877
/* Helper function to add_local_route() and delete_local_route() */
1077
1084
bool match = false;
1078
1085
{
1079
1086
char *interface = NULL;
1080
while((interface=argz_next(mc->interfaces, mc->interfaces_size,
1081
interface))){
1087
while((interface = argz_next(mc->interfaces,
1088
mc->interfaces_size,
1089
interface))){
1082
1090
if(if_nametoindex(interface) == (unsigned int)if_index){
1083
1091
match = true;
1084
1092
break;
1237
1245
with an explicit route added with the server's address.
1238
1246
1239
1247
Avahi bug reference:
1240
http://lists.freedesktop.org/archives/avahi/2010-February/001833.html
1248
https://lists.freedesktop.org/archives/avahi/2010-February/001833.html
1241
1249
https://bugs.debian.org/587961
1242
1250
*/
1243
1251
if(debug){
1423
1431
&decrypted_buffer, mc);
1424
1432
if(decrypted_buffer_size >= 0){
1425
1433
1434
clearerr(stdout);
1426
1435
written = 0;
1427
1436
while(written < (size_t) decrypted_buffer_size){
1428
1437
if(quit_now){
1444
1453
}
1445
1454
written += (size_t)ret;
1446
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
}
1447
1466
retval = 0;
1448
1467
}
1449
1468
}
1480
1499
return retval;
1481
1500
}
1482
1501
1483
__attribute__((nonnull))
1484
1502
static void resolve_callback(AvahiSServiceResolver *r,
1485
1503
AvahiIfIndex interface,
1486
1504
AvahiProtocol proto,
1623
1641
__attribute__((nonnull, warn_unused_result))
1624
1642
bool get_flags(const char *ifname, struct ifreq *ifr){
1625
1643
int ret;
1626
error_t ret_errno;
1644
int old_errno;
1627
1645
1628
1646
int s = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1629
1647
if(s < 0){
1630
ret_errno = errno;
1648
old_errno = errno;
1631
1649
perror_plus("socket");
1632
errno = ret_errno;
1650
errno = old_errno;
1633
1651
return false;
1634
1652
}
1635
1653
strncpy(ifr->ifr_name, ifname, IF_NAMESIZE);
1637
1655
ret = ioctl(s, SIOCGIFFLAGS, ifr);
1638
1656
if(ret == -1){
1639
1657
if(debug){
1640
ret_errno = errno;
1658
old_errno = errno;
1641
1659
perror_plus("ioctl SIOCGIFFLAGS");
1642
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;
1643
1666
}
1644
1667
return false;
1645
1668
}
1669
if((close(s) == -1) and debug){
1670
old_errno = errno;
1671
perror_plus("close");
1672
errno = old_errno;
1673
}
1646
1674
return true;
1647
1675
}
1648
1676
1909
1937
return;
1910
1938
}
1911
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
}
1912
1945
int numhooks = scandirat(hookdir_fd, ".", &direntries,
1913
1946
runnable_hook, alphasort);
1914
1947
if(numhooks == -1){
1915
1948
perror_plus("scandir");
1949
close(devnull);
1916
1950
return;
1917
1951
}
1918
1952
struct dirent *direntry;
1919
1953
int ret;
1920
int devnull = (int)TEMP_FAILURE_RETRY(open("/dev/null", O_RDONLY));
1921
if(devnull == -1){
1922
perror_plus("open(\"/dev/null\", O_RDONLY)");
1923
return;
1924
}
1925
1954
for(int i = 0; i < numhooks; i++){
1926
1955
direntry = direntries[i];
1927
1956
if(debug){
2071
2100
}
2072
2101
2073
2102
__attribute__((nonnull, warn_unused_result))
2074
error_t bring_up_interface(const char *const interface,
2075
const float delay){
2076
error_t old_errno = errno;
2103
int bring_up_interface(const char *const interface,
2104
const float delay){
2105
int old_errno = errno;
2077
2106
int ret;
2078
2107
struct ifreq network;
2079
2108
unsigned int if_index = if_nametoindex(interface);
2089
2118
}
2090
2119
2091
2120
if(not interface_is_up(interface)){
2092
error_t ret_errno = 0, ioctl_errno = 0;
2121
int ret_errno = 0;
2122
int ioctl_errno = 0;
2093
2123
if(not get_flags(interface, &network)){
2094
2124
ret_errno = errno;
2095
2125
fprintf_plus(stderr, "Failed to get flags for interface "
2182
2212
2183
2213
/* Sleep checking until interface is running.
2184
2214
Check every 0.25s, up to total time of delay */
2185
for(int i=0; i < delay * 4; i++){
2215
for(int i = 0; i < delay * 4; i++){
2186
2216
if(interface_is_running(interface)){
2187
2217
break;
2188
2218
}
2198
2228
}
2199
2229
2200
2230
__attribute__((nonnull, warn_unused_result))
2201
error_t take_down_interface(const char *const interface){
2202
error_t old_errno = errno;
2231
int take_down_interface(const char *const interface){
2232
int old_errno = errno;
2203
2233
struct ifreq network;
2204
2234
unsigned int if_index = if_nametoindex(interface);
2205
2235
if(if_index == 0){
2208
2238
return ENXIO;
2209
2239
}
2210
2240
if(interface_is_up(interface)){
2211
error_t ret_errno = 0, ioctl_errno = 0;
2241
int ret_errno = 0;
2242
int ioctl_errno = 0;
2212
2243
if(not get_flags(interface, &network) and debug){
2213
2244
ret_errno = errno;
2214
2245
fprintf_plus(stderr, "Failed to get flags for interface "
2464
2495
.args_doc = "",
2465
2496
.doc = "Mandos client -- Get and decrypt"
2466
2497
" passwords from a Mandos server" };
2467
ret = argp_parse(&argp, argc, argv,
2468
ARGP_IN_ORDER | ARGP_NO_HELP, 0, NULL);
2469
switch(ret){
2498
ret_errno = argp_parse(&argp, argc, argv,
2499
ARGP_IN_ORDER | ARGP_NO_HELP, 0, NULL);
2500
switch(ret_errno){
2470
2501
case 0:
2471
2502
break;
2472
2503
case ENOMEM:
2473
2504
default:
2474
errno = ret;
2505
errno = ret_errno;
2475
2506
perror_plus("argp_parse");
2476
2507
exitcode = EX_OSERR;
2477
2508
goto end;
2483
2514
2484
2515
{
2485
2516
/* Work around Debian bug #633582:
2486
<http://bugs.debian.org/633582> */
2517
<https://bugs.debian.org/633582> */
2487
2518
2488
2519
/* Re-raise privileges */
2489
ret_errno = raise_privileges();
2490
if(ret_errno != 0){
2491
errno = ret_errno;
2520
ret = raise_privileges();
2521
if(ret != 0){
2522
errno = ret;
2492
2523
perror_plus("Failed to raise privileges");
2493
2524
} else {
2494
2525
struct stat st;
2558
2589
}
2559
2590
2560
2591
/* Lower privileges */
2561
ret_errno = lower_privileges();
2562
if(ret_errno != 0){
2563
errno = ret_errno;
2592
ret = lower_privileges();
2593
if(ret != 0){
2594
errno = ret;
2564
2595
perror_plus("Failed to lower privileges");
2565
2596
}
2566
2597
}
2894
2925
2895
2926
/* Allocate a new server */
2896
2927
mc.server = avahi_server_new(avahi_simple_poll_get(simple_poll),
2897
&config, NULL, NULL, &ret_errno);
2928
&config, NULL, NULL, &ret);
2898
2929
2899
2930
/* Free the Avahi configuration data */
2900
2931
avahi_server_config_free(&config);
2903
2934
/* Check if creating the Avahi server object succeeded */
2904
2935
if(mc.server == NULL){
2905
2936
fprintf_plus(stderr, "Failed to create Avahi server: %s\n",
2906
avahi_strerror(ret_errno));
2937
avahi_strerror(ret));
2907
2938
exitcode = EX_UNAVAILABLE;
2908
2939
goto end;
2909
2940
}
2944
2975
end:
2945
2976
2946
2977
if(debug){
2947
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
}
2948
2985
}
2949
2986
2950
2987
/* Cleanup things */
2989
3026
2990
3027
/* Re-raise privileges */
2991
3028
{
2992
ret_errno = raise_privileges();
2993
if(ret_errno != 0){
2994
errno = ret_errno;
3029
ret = raise_privileges();
3030
if(ret != 0){
3031
errno = ret;
2995
3032
perror_plus("Failed to raise privileges");
2996
3033
} else {
2997
3034
3002
3039
/* Take down the network interfaces which were brought up */
3003
3040
{
3004
3041
char *interface = NULL;
3005
while((interface=argz_next(interfaces_to_take_down,
3006
interfaces_to_take_down_size,
3007
interface))){
3008
ret_errno = take_down_interface(interface);
3009
if(ret_errno != 0){
3010
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;
3011
3048
perror_plus("Failed to take down interface");
3012
3049
}
3013
3050
}
3018
3055
}
3019
3056
}
3020
3057
3021
ret_errno = lower_privileges_permanently();
3022
if(ret_errno != 0){
3023
errno = ret_errno;
3058
ret = lower_privileges_permanently();
3059
if(ret != 0){
3060
errno = ret;
3024
3061
perror_plus("Failed to lower privileges permanently");
3025
3062
}
3026
3063
}
3039
3076
| O_PATH));
3040
3077
if(dir_fd == -1){
3041
3078
perror_plus("open");
3079
return;
3042
3080
}
3043
3081
int numentries = scandirat(dir_fd, ".", &direntries,
3044
3082
notdotentries, alphasort);
3061
3099
clean_dir_at(dir_fd, direntries[i]->d_name, level+1);
3062
3100
dret = 0;
3063
3101
}
3064
if(dret == -1){
3102
if((dret == -1) and (errno != ENOENT)){
3065
3103
fprintf_plus(stderr, "unlink(\"%s/%s\"): %s\n", dirname,
3066
3104
direntries[i]->d_name, strerror(errno));
3067
3105
}
3071
3109
3072
3110
/* need to clean even if 0 because man page doesn't specify */
3073
3111
free(direntries);
3074
if(numentries == -1){
3075
perror_plus("scandirat");
3076
}
3077
3112
dret = unlinkat(base, dirname, AT_REMOVEDIR);
3078
3113
if(dret == -1 and errno != ENOENT){
3079
3114
perror_plus("rmdir");
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0