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- Committer: Teddy Hogeborn
- Date: 2016-02-29 21:28:39 UTC
- mto: This revision was merged to the branch mainline in revision 814.
- Revision ID: teddy@recompile.se-20160229212839-hoz3rw1us3uds68n
Tags: version-1.7.3-1
* Makefile (version): Changed to "1.7.3".
* NEWS (Version 1.7.3): New entry.
* debian/changelog (1.7.3-1): - '' -
* NEWS (Version 1.7.3): New entry.
* debian/changelog (1.7.3-1): - '' -
added
removed
plugins.d/mandos-client.c
9
9
* "browse_callback", and parts of "main".
10
10
*
11
11
* Everything else is
12
* Copyright © 2008-2017 Teddy Hogeborn
13
* Copyright © 2008-2017 Björn Påhlsson
12
* Copyright © 2008-2016 Teddy Hogeborn
13
* Copyright © 2008-2016 Björn Påhlsson
14
14
*
15
15
* This program is free software: you can redistribute it and/or
16
16
* modify it under the terms of the GNU General Public License as
47
47
strtof(), abort() */
48
48
#include <stdbool.h> /* bool, false, true */
49
49
#include <string.h> /* strcmp(), strlen(), strerror(),
50
asprintf(), strncpy(), strsignal()
51
*/
50
asprintf(), strncpy() */
52
51
#include <sys/ioctl.h> /* ioctl */
53
52
#include <sys/types.h> /* socket(), inet_pton(), sockaddr,
54
53
sockaddr_in6, PF_INET6,
626
625
safer_gnutls_strerror(ret));
627
626
dhparamsfilename = NULL;
628
627
}
629
free(params.data);
630
628
} while(false);
631
629
}
632
630
if(dhparamsfilename == NULL){
819
817
820
818
/* Set effective uid to 0, return errno */
821
819
__attribute__((warn_unused_result))
822
int raise_privileges(void){
823
int old_errno = errno;
824
int ret = 0;
820
error_t raise_privileges(void){
821
error_t old_errno = errno;
822
error_t ret_errno = 0;
825
823
if(seteuid(0) == -1){
826
ret = errno;
824
ret_errno = errno;
827
825
}
828
826
errno = old_errno;
829
return ret;
827
return ret_errno;
830
828
}
831
829
832
830
/* Set effective and real user ID to 0. Return errno. */
833
831
__attribute__((warn_unused_result))
834
int raise_privileges_permanently(void){
835
int old_errno = errno;
836
int ret = raise_privileges();
837
if(ret != 0){
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){
838
836
errno = old_errno;
839
return ret;
837
return ret_errno;
840
838
}
841
839
if(setuid(0) == -1){
842
ret = errno;
840
ret_errno = errno;
843
841
}
844
842
errno = old_errno;
845
return ret;
843
return ret_errno;
846
844
}
847
845
848
846
/* Set effective user ID to unprivileged saved user ID */
849
847
__attribute__((warn_unused_result))
850
int lower_privileges(void){
851
int old_errno = errno;
852
int ret = 0;
848
error_t lower_privileges(void){
849
error_t old_errno = errno;
850
error_t ret_errno = 0;
853
851
if(seteuid(uid) == -1){
854
ret = errno;
852
ret_errno = errno;
855
853
}
856
854
errno = old_errno;
857
return ret;
855
return ret_errno;
858
856
}
859
857
860
858
/* Lower privileges permanently */
861
859
__attribute__((warn_unused_result))
862
int lower_privileges_permanently(void){
863
int old_errno = errno;
864
int ret = 0;
860
error_t lower_privileges_permanently(void){
861
error_t old_errno = errno;
862
error_t ret_errno = 0;
865
863
if(setuid(uid) == -1){
866
ret = errno;
864
ret_errno = errno;
867
865
}
868
866
errno = old_errno;
869
return ret;
867
return ret_errno;
870
868
}
871
869
872
870
/* Helper function to add_local_route() and delete_local_route() */
1079
1077
bool match = false;
1080
1078
{
1081
1079
char *interface = NULL;
1082
while((interface = argz_next(mc->interfaces,
1083
mc->interfaces_size,
1084
interface))){
1080
while((interface=argz_next(mc->interfaces, mc->interfaces_size,
1081
interface))){
1085
1082
if(if_nametoindex(interface) == (unsigned int)if_index){
1086
1083
match = true;
1087
1084
break;
1240
1237
with an explicit route added with the server's address.
1241
1238
1242
1239
Avahi bug reference:
1243
https://lists.freedesktop.org/archives/avahi/2010-February/001833.html
1240
http://lists.freedesktop.org/archives/avahi/2010-February/001833.html
1244
1241
https://bugs.debian.org/587961
1245
1242
*/
1246
1243
if(debug){
1426
1423
&decrypted_buffer, mc);
1427
1424
if(decrypted_buffer_size >= 0){
1428
1425
1429
clearerr(stdout);
1430
1426
written = 0;
1431
1427
while(written < (size_t) decrypted_buffer_size){
1432
1428
if(quit_now){
1448
1444
}
1449
1445
written += (size_t)ret;
1450
1446
}
1451
ret = fflush(stdout);
1452
if(ret != 0){
1453
int e = errno;
1454
if(debug){
1455
fprintf_plus(stderr, "Error writing encrypted data: %s\n",
1456
strerror(errno));
1457
}
1458
errno = e;
1459
goto mandos_end;
1460
}
1461
1447
retval = 0;
1462
1448
}
1463
1449
}
1494
1480
return retval;
1495
1481
}
1496
1482
1483
__attribute__((nonnull))
1497
1484
static void resolve_callback(AvahiSServiceResolver *r,
1498
1485
AvahiIfIndex interface,
1499
1486
AvahiProtocol proto,
1636
1623
__attribute__((nonnull, warn_unused_result))
1637
1624
bool get_flags(const char *ifname, struct ifreq *ifr){
1638
1625
int ret;
1639
int old_errno;
1626
error_t ret_errno;
1640
1627
1641
1628
int s = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1642
1629
if(s < 0){
1643
old_errno = errno;
1630
ret_errno = errno;
1644
1631
perror_plus("socket");
1645
errno = old_errno;
1632
errno = ret_errno;
1646
1633
return false;
1647
1634
}
1648
1635
strncpy(ifr->ifr_name, ifname, IF_NAMESIZE);
1650
1637
ret = ioctl(s, SIOCGIFFLAGS, ifr);
1651
1638
if(ret == -1){
1652
1639
if(debug){
1653
old_errno = errno;
1640
ret_errno = errno;
1654
1641
perror_plus("ioctl SIOCGIFFLAGS");
1655
errno = old_errno;
1642
errno = ret_errno;
1656
1643
}
1657
1644
return false;
1658
1645
}
2084
2071
}
2085
2072
2086
2073
__attribute__((nonnull, warn_unused_result))
2087
int bring_up_interface(const char *const interface,
2088
const float delay){
2089
int old_errno = errno;
2074
error_t bring_up_interface(const char *const interface,
2075
const float delay){
2076
error_t old_errno = errno;
2090
2077
int ret;
2091
2078
struct ifreq network;
2092
2079
unsigned int if_index = if_nametoindex(interface);
2102
2089
}
2103
2090
2104
2091
if(not interface_is_up(interface)){
2105
int ret_errno = 0;
2106
int ioctl_errno = 0;
2092
error_t ret_errno = 0, ioctl_errno = 0;
2107
2093
if(not get_flags(interface, &network)){
2108
2094
ret_errno = errno;
2109
2095
fprintf_plus(stderr, "Failed to get flags for interface "
2196
2182
2197
2183
/* Sleep checking until interface is running.
2198
2184
Check every 0.25s, up to total time of delay */
2199
for(int i = 0; i < delay * 4; i++){
2185
for(int i=0; i < delay * 4; i++){
2200
2186
if(interface_is_running(interface)){
2201
2187
break;
2202
2188
}
2212
2198
}
2213
2199
2214
2200
__attribute__((nonnull, warn_unused_result))
2215
int take_down_interface(const char *const interface){
2216
int old_errno = errno;
2201
error_t take_down_interface(const char *const interface){
2202
error_t old_errno = errno;
2217
2203
struct ifreq network;
2218
2204
unsigned int if_index = if_nametoindex(interface);
2219
2205
if(if_index == 0){
2222
2208
return ENXIO;
2223
2209
}
2224
2210
if(interface_is_up(interface)){
2225
int ret_errno = 0;
2226
int ioctl_errno = 0;
2211
error_t ret_errno = 0, ioctl_errno = 0;
2227
2212
if(not get_flags(interface, &network) and debug){
2228
2213
ret_errno = errno;
2229
2214
fprintf_plus(stderr, "Failed to get flags for interface "
2479
2464
.args_doc = "",
2480
2465
.doc = "Mandos client -- Get and decrypt"
2481
2466
" passwords from a Mandos server" };
2482
ret_errno = argp_parse(&argp, argc, argv,
2483
ARGP_IN_ORDER | ARGP_NO_HELP, 0, NULL);
2484
switch(ret_errno){
2467
ret = argp_parse(&argp, argc, argv,
2468
ARGP_IN_ORDER | ARGP_NO_HELP, 0, NULL);
2469
switch(ret){
2485
2470
case 0:
2486
2471
break;
2487
2472
case ENOMEM:
2488
2473
default:
2489
errno = ret_errno;
2474
errno = ret;
2490
2475
perror_plus("argp_parse");
2491
2476
exitcode = EX_OSERR;
2492
2477
goto end;
2498
2483
2499
2484
{
2500
2485
/* Work around Debian bug #633582:
2501
<https://bugs.debian.org/633582> */
2486
<http://bugs.debian.org/633582> */
2502
2487
2503
2488
/* Re-raise privileges */
2504
ret = raise_privileges();
2505
if(ret != 0){
2506
errno = ret;
2489
ret_errno = raise_privileges();
2490
if(ret_errno != 0){
2491
errno = ret_errno;
2507
2492
perror_plus("Failed to raise privileges");
2508
2493
} else {
2509
2494
struct stat st;
2573
2558
}
2574
2559
2575
2560
/* Lower privileges */
2576
ret = lower_privileges();
2577
if(ret != 0){
2578
errno = ret;
2561
ret_errno = lower_privileges();
2562
if(ret_errno != 0){
2563
errno = ret_errno;
2579
2564
perror_plus("Failed to lower privileges");
2580
2565
}
2581
2566
}
2909
2894
2910
2895
/* Allocate a new server */
2911
2896
mc.server = avahi_server_new(avahi_simple_poll_get(simple_poll),
2912
&config, NULL, NULL, &ret);
2897
&config, NULL, NULL, &ret_errno);
2913
2898
2914
2899
/* Free the Avahi configuration data */
2915
2900
avahi_server_config_free(&config);
2918
2903
/* Check if creating the Avahi server object succeeded */
2919
2904
if(mc.server == NULL){
2920
2905
fprintf_plus(stderr, "Failed to create Avahi server: %s\n",
2921
avahi_strerror(ret));
2906
avahi_strerror(ret_errno));
2922
2907
exitcode = EX_UNAVAILABLE;
2923
2908
goto end;
2924
2909
}
2959
2944
end:
2960
2945
2961
2946
if(debug){
2962
if(signal_received){
2963
fprintf_plus(stderr, "%s exiting due to signal %d: %s\n",
2964
argv[0], signal_received,
2965
strsignal(signal_received));
2966
} else {
2967
fprintf_plus(stderr, "%s exiting\n", argv[0]);
2968
}
2947
fprintf_plus(stderr, "%s exiting\n", argv[0]);
2969
2948
}
2970
2949
2971
2950
/* Cleanup things */
3010
2989
3011
2990
/* Re-raise privileges */
3012
2991
{
3013
ret = raise_privileges();
3014
if(ret != 0){
3015
errno = ret;
2992
ret_errno = raise_privileges();
2993
if(ret_errno != 0){
2994
errno = ret_errno;
3016
2995
perror_plus("Failed to raise privileges");
3017
2996
} else {
3018
2997
3023
3002
/* Take down the network interfaces which were brought up */
3024
3003
{
3025
3004
char *interface = NULL;
3026
while((interface = argz_next(interfaces_to_take_down,
3027
interfaces_to_take_down_size,
3028
interface))){
3029
ret = take_down_interface(interface);
3030
if(ret != 0){
3031
errno = ret;
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;
3032
3011
perror_plus("Failed to take down interface");
3033
3012
}
3034
3013
}
3039
3018
}
3040
3019
}
3041
3020
3042
ret = lower_privileges_permanently();
3043
if(ret != 0){
3044
errno = ret;
3021
ret_errno = lower_privileges_permanently();
3022
if(ret_errno != 0){
3023
errno = ret_errno;
3045
3024
perror_plus("Failed to lower privileges permanently");
3046
3025
}
3047
3026
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0