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- Committer: Teddy Hogeborn
- Date: 2015-12-05 01:20:26 UTC
- mfrom: (237.7.341 trunk)
- Revision ID: teddy@recompile.se-20151205012026-l4honhk310e34s2e
Merge from trunk.
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
12
* Copyright © 2008-2015 Teddy Hogeborn
13
* Copyright © 2008-2015 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(), strcpy() */
52
51
#include <sys/ioctl.h> /* ioctl */
53
52
#include <sys/types.h> /* socket(), inet_pton(), sockaddr,
54
53
sockaddr_in6, PF_INET6,
58
57
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
59
58
inet_pton(), connect(),
60
59
getnameinfo() */
61
#include <fcntl.h> /* open(), unlinkat(), AT_REMOVEDIR */
60
#include <fcntl.h> /* open(), unlinkat() */
62
61
#include <dirent.h> /* opendir(), struct dirent, readdir()
63
62
*/
64
63
#include <inttypes.h> /* PRIu16, PRIdMAX, intmax_t,
65
64
strtoimax() */
66
#include <errno.h> /* perror(), errno, EINTR, EINVAL,
67
EAI_SYSTEM, ENETUNREACH,
68
EHOSTUNREACH, ECONNREFUSED, EPROTO,
69
EIO, ENOENT, ENXIO, ENOMEM, EISDIR,
70
ENOTEMPTY,
65
#include <errno.h> /* perror(), errno,
71
66
program_invocation_short_name */
72
67
#include <time.h> /* nanosleep(), time(), sleep() */
73
68
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
518
513
fprintf_plus(stderr, "GnuTLS: %s", string);
519
514
}
520
515
521
__attribute__((nonnull(1, 2, 4), warn_unused_result))
516
__attribute__((nonnull, warn_unused_result))
522
517
static int init_gnutls_global(const char *pubkeyfilename,
523
518
const char *seckeyfilename,
524
519
const char *dhparamsfilename,
530
525
fprintf_plus(stderr, "Initializing GnuTLS\n");
531
526
}
532
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
533
535
if(debug){
534
536
/* "Use a log level over 10 to enable all debugging options."
535
537
* - GnuTLS manual
543
545
if(ret != GNUTLS_E_SUCCESS){
544
546
fprintf_plus(stderr, "GnuTLS memory error: %s\n",
545
547
safer_gnutls_strerror(ret));
548
gnutls_global_deinit();
546
549
return -1;
547
550
}
548
551
752
755
globalfail:
753
756
754
757
gnutls_certificate_free_credentials(mc->cred);
758
gnutls_global_deinit();
755
759
gnutls_dh_params_deinit(mc->dh_params);
756
760
return -1;
757
761
}
818
822
819
823
/* Set effective uid to 0, return errno */
820
824
__attribute__((warn_unused_result))
821
int raise_privileges(void){
822
int old_errno = errno;
823
int ret = 0;
825
error_t raise_privileges(void){
826
error_t old_errno = errno;
827
error_t ret_errno = 0;
824
828
if(seteuid(0) == -1){
825
ret = errno;
829
ret_errno = errno;
826
830
}
827
831
errno = old_errno;
828
return ret;
832
return ret_errno;
829
833
}
830
834
831
835
/* Set effective and real user ID to 0. Return errno. */
832
836
__attribute__((warn_unused_result))
833
int raise_privileges_permanently(void){
834
int old_errno = errno;
835
int ret = raise_privileges();
836
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){
837
841
errno = old_errno;
838
return ret;
842
return ret_errno;
839
843
}
840
844
if(setuid(0) == -1){
841
ret = errno;
845
ret_errno = errno;
842
846
}
843
847
errno = old_errno;
844
return ret;
848
return ret_errno;
845
849
}
846
850
847
851
/* Set effective user ID to unprivileged saved user ID */
848
852
__attribute__((warn_unused_result))
849
int lower_privileges(void){
850
int old_errno = errno;
851
int ret = 0;
853
error_t lower_privileges(void){
854
error_t old_errno = errno;
855
error_t ret_errno = 0;
852
856
if(seteuid(uid) == -1){
853
ret = errno;
857
ret_errno = errno;
854
858
}
855
859
errno = old_errno;
856
return ret;
860
return ret_errno;
857
861
}
858
862
859
863
/* Lower privileges permanently */
860
864
__attribute__((warn_unused_result))
861
int lower_privileges_permanently(void){
862
int old_errno = errno;
863
int ret = 0;
865
error_t lower_privileges_permanently(void){
866
error_t old_errno = errno;
867
error_t ret_errno = 0;
864
868
if(setuid(uid) == -1){
865
ret = errno;
869
ret_errno = errno;
866
870
}
867
871
errno = old_errno;
868
return ret;
872
return ret_errno;
869
873
}
870
874
871
875
/* Helper function to add_local_route() and delete_local_route() */
1238
1242
with an explicit route added with the server's address.
1239
1243
1240
1244
Avahi bug reference:
1241
https://lists.freedesktop.org/archives/avahi/2010-February/001833.html
1245
http://lists.freedesktop.org/archives/avahi/2010-February/001833.html
1242
1246
https://bugs.debian.org/587961
1243
1247
*/
1244
1248
if(debug){
1424
1428
&decrypted_buffer, mc);
1425
1429
if(decrypted_buffer_size >= 0){
1426
1430
1427
clearerr(stdout);
1428
1431
written = 0;
1429
1432
while(written < (size_t) decrypted_buffer_size){
1430
1433
if(quit_now){
1446
1449
}
1447
1450
written += (size_t)ret;
1448
1451
}
1449
ret = fflush(stdout);
1450
if(ret != 0){
1451
int e = errno;
1452
if(debug){
1453
fprintf_plus(stderr, "Error writing encrypted data: %s\n",
1454
strerror(errno));
1455
}
1456
errno = e;
1457
goto mandos_end;
1458
}
1459
1452
retval = 0;
1460
1453
}
1461
1454
}
1635
1628
__attribute__((nonnull, warn_unused_result))
1636
1629
bool get_flags(const char *ifname, struct ifreq *ifr){
1637
1630
int ret;
1638
int old_errno;
1631
error_t ret_errno;
1639
1632
1640
1633
int s = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1641
1634
if(s < 0){
1642
old_errno = errno;
1635
ret_errno = errno;
1643
1636
perror_plus("socket");
1644
errno = old_errno;
1637
errno = ret_errno;
1645
1638
return false;
1646
1639
}
1647
strncpy(ifr->ifr_name, ifname, IF_NAMESIZE);
1648
ifr->ifr_name[IF_NAMESIZE-1] = '\0'; /* NUL terminate */
1640
strcpy(ifr->ifr_name, ifname);
1649
1641
ret = ioctl(s, SIOCGIFFLAGS, ifr);
1650
1642
if(ret == -1){
1651
1643
if(debug){
1652
old_errno = errno;
1644
ret_errno = errno;
1653
1645
perror_plus("ioctl SIOCGIFFLAGS");
1654
errno = old_errno;
1646
errno = ret_errno;
1655
1647
}
1656
1648
return false;
1657
1649
}
1921
1913
return;
1922
1914
}
1923
1915
}
1916
#ifdef __GLIBC__
1917
#if __GLIBC_PREREQ(2, 15)
1924
1918
int numhooks = scandirat(hookdir_fd, ".", &direntries,
1925
1919
runnable_hook, alphasort);
1920
#else /* not __GLIBC_PREREQ(2, 15) */
1921
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1922
alphasort);
1923
#endif /* not __GLIBC_PREREQ(2, 15) */
1924
#else /* not __GLIBC__ */
1925
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1926
alphasort);
1927
#endif /* not __GLIBC__ */
1926
1928
if(numhooks == -1){
1927
1929
perror_plus("scandir");
1928
1930
return;
2083
2085
}
2084
2086
2085
2087
__attribute__((nonnull, warn_unused_result))
2086
int bring_up_interface(const char *const interface,
2087
const float delay){
2088
int old_errno = errno;
2088
error_t bring_up_interface(const char *const interface,
2089
const float delay){
2090
error_t old_errno = errno;
2089
2091
int ret;
2090
2092
struct ifreq network;
2091
2093
unsigned int if_index = if_nametoindex(interface);
2101
2103
}
2102
2104
2103
2105
if(not interface_is_up(interface)){
2104
int ret_errno = 0;
2105
int ioctl_errno = 0;
2106
error_t ret_errno = 0, ioctl_errno = 0;
2106
2107
if(not get_flags(interface, &network)){
2107
2108
ret_errno = errno;
2108
2109
fprintf_plus(stderr, "Failed to get flags for interface "
2211
2212
}
2212
2213
2213
2214
__attribute__((nonnull, warn_unused_result))
2214
int take_down_interface(const char *const interface){
2215
int old_errno = errno;
2215
error_t take_down_interface(const char *const interface){
2216
error_t old_errno = errno;
2216
2217
struct ifreq network;
2217
2218
unsigned int if_index = if_nametoindex(interface);
2218
2219
if(if_index == 0){
2221
2222
return ENXIO;
2222
2223
}
2223
2224
if(interface_is_up(interface)){
2224
int ret_errno = 0;
2225
int ioctl_errno = 0;
2225
error_t ret_errno = 0, ioctl_errno = 0;
2226
2226
if(not get_flags(interface, &network) and debug){
2227
2227
ret_errno = errno;
2228
2228
fprintf_plus(stderr, "Failed to get flags for interface "
2478
2478
.args_doc = "",
2479
2479
.doc = "Mandos client -- Get and decrypt"
2480
2480
" passwords from a Mandos server" };
2481
ret_errno = argp_parse(&argp, argc, argv,
2482
ARGP_IN_ORDER | ARGP_NO_HELP, 0, NULL);
2483
switch(ret_errno){
2481
ret = argp_parse(&argp, argc, argv,
2482
ARGP_IN_ORDER | ARGP_NO_HELP, 0, NULL);
2483
switch(ret){
2484
2484
case 0:
2485
2485
break;
2486
2486
case ENOMEM:
2487
2487
default:
2488
errno = ret_errno;
2488
errno = ret;
2489
2489
perror_plus("argp_parse");
2490
2490
exitcode = EX_OSERR;
2491
2491
goto end;
2497
2497
2498
2498
{
2499
2499
/* Work around Debian bug #633582:
2500
<https://bugs.debian.org/633582> */
2500
<http://bugs.debian.org/633582> */
2501
2501
2502
2502
/* Re-raise privileges */
2503
ret = raise_privileges();
2504
if(ret != 0){
2505
errno = ret;
2503
ret_errno = raise_privileges();
2504
if(ret_errno != 0){
2505
errno = ret_errno;
2506
2506
perror_plus("Failed to raise privileges");
2507
2507
} else {
2508
2508
struct stat st;
2572
2572
}
2573
2573
2574
2574
/* Lower privileges */
2575
ret = lower_privileges();
2576
if(ret != 0){
2577
errno = ret;
2575
ret_errno = lower_privileges();
2576
if(ret_errno != 0){
2577
errno = ret_errno;
2578
2578
perror_plus("Failed to lower privileges");
2579
2579
}
2580
2580
}
2908
2908
2909
2909
/* Allocate a new server */
2910
2910
mc.server = avahi_server_new(avahi_simple_poll_get(simple_poll),
2911
&config, NULL, NULL, &ret);
2911
&config, NULL, NULL, &ret_errno);
2912
2912
2913
2913
/* Free the Avahi configuration data */
2914
2914
avahi_server_config_free(&config);
2917
2917
/* Check if creating the Avahi server object succeeded */
2918
2918
if(mc.server == NULL){
2919
2919
fprintf_plus(stderr, "Failed to create Avahi server: %s\n",
2920
avahi_strerror(ret));
2920
avahi_strerror(ret_errno));
2921
2921
exitcode = EX_UNAVAILABLE;
2922
2922
goto end;
2923
2923
}
2958
2958
end:
2959
2959
2960
2960
if(debug){
2961
if(signal_received){
2962
fprintf_plus(stderr, "%s exiting due to signal %d: %s\n",
2963
argv[0], signal_received,
2964
strsignal(signal_received));
2965
} else {
2966
fprintf_plus(stderr, "%s exiting\n", argv[0]);
2967
}
2961
fprintf_plus(stderr, "%s exiting\n", argv[0]);
2968
2962
}
2969
2963
2970
2964
/* Cleanup things */
2981
2975
2982
2976
if(gnutls_initialized){
2983
2977
gnutls_certificate_free_credentials(mc.cred);
2978
gnutls_global_deinit();
2984
2979
gnutls_dh_params_deinit(mc.dh_params);
2985
2980
}
2986
2981
3009
3004
3010
3005
/* Re-raise privileges */
3011
3006
{
3012
ret = raise_privileges();
3013
if(ret != 0){
3014
errno = ret;
3007
ret_errno = raise_privileges();
3008
if(ret_errno != 0){
3009
errno = ret_errno;
3015
3010
perror_plus("Failed to raise privileges");
3016
3011
} else {
3017
3012
3025
3020
while((interface=argz_next(interfaces_to_take_down,
3026
3021
interfaces_to_take_down_size,
3027
3022
interface))){
3028
ret = take_down_interface(interface);
3029
if(ret != 0){
3030
errno = ret;
3023
ret_errno = take_down_interface(interface);
3024
if(ret_errno != 0){
3025
errno = ret_errno;
3031
3026
perror_plus("Failed to take down interface");
3032
3027
}
3033
3028
}
3038
3033
}
3039
3034
}
3040
3035
3041
ret = lower_privileges_permanently();
3042
if(ret != 0){
3043
errno = ret;
3036
ret_errno = lower_privileges_permanently();
3037
if(ret_errno != 0){
3038
errno = ret_errno;
3044
3039
perror_plus("Failed to lower privileges permanently");
3045
3040
}
3046
3041
}
3048
3043
free(interfaces_to_take_down);
3049
3044
free(interfaces_hooks);
3050
3045
3051
void clean_dir_at(int base, const char * const dirname,
3052
uintmax_t level){
3053
struct dirent **direntries = NULL;
3054
int dret;
3055
int dir_fd = (int)TEMP_FAILURE_RETRY(openat(base, dirname,
3056
O_RDONLY
3057
| O_NOFOLLOW
3058
| O_DIRECTORY
3059
| O_PATH));
3060
if(dir_fd == -1){
3061
perror_plus("open");
3062
}
3063
int numentries = scandirat(dir_fd, ".", &direntries,
3064
notdotentries, alphasort);
3065
if(numentries >= 0){
3066
for(int i = 0; i < numentries; i++){
3067
if(debug){
3068
fprintf_plus(stderr, "Unlinking \"%s/%s\"\n",
3069
dirname, direntries[i]->d_name);
3070
}
3071
dret = unlinkat(dir_fd, direntries[i]->d_name, 0);
3072
if(dret == -1){
3073
if(errno == EISDIR){
3074
dret = unlinkat(dir_fd, direntries[i]->d_name,
3075
AT_REMOVEDIR);
3076
}
3077
if((dret == -1) and (errno == ENOTEMPTY)
3078
and (strcmp(direntries[i]->d_name, "private-keys-v1.d")
3079
== 0) and (level == 0)){
3080
/* Recurse only in this special case */
3081
clean_dir_at(dir_fd, direntries[i]->d_name, level+1);
3082
dret = 0;
3083
}
3084
if(dret == -1){
3085
fprintf_plus(stderr, "unlink(\"%s/%s\"): %s\n", dirname,
3086
direntries[i]->d_name, strerror(errno));
3087
}
3088
}
3089
free(direntries[i]);
3090
}
3091
3092
/* need to clean even if 0 because man page doesn't specify */
3093
free(direntries);
3094
if(numentries == -1){
3095
perror_plus("scandirat");
3096
}
3097
dret = unlinkat(base, dirname, AT_REMOVEDIR);
3098
if(dret == -1 and errno != ENOENT){
3099
perror_plus("rmdir");
3100
}
3101
} else {
3102
perror_plus("scandirat");
3103
}
3104
close(dir_fd);
3105
}
3106
3107
3046
/* Removes the GPGME temp directory and all files inside */
3108
3047
if(tempdir != NULL){
3109
clean_dir_at(-1, tempdir, 0);
3048
struct dirent **direntries = NULL;
3049
int tempdir_fd = (int)TEMP_FAILURE_RETRY(open(tempdir, O_RDONLY
3050
| O_NOFOLLOW
3051
| O_DIRECTORY
3052
| O_PATH));
3053
if(tempdir_fd == -1){
3054
perror_plus("open");
3055
} else {
3056
#ifdef __GLIBC__
3057
#if __GLIBC_PREREQ(2, 15)
3058
int numentries = scandirat(tempdir_fd, ".", &direntries,
3059
notdotentries, alphasort);
3060
#else /* not __GLIBC_PREREQ(2, 15) */
3061
int numentries = scandir(tempdir, &direntries, notdotentries,
3062
alphasort);
3063
#endif /* not __GLIBC_PREREQ(2, 15) */
3064
#else /* not __GLIBC__ */
3065
int numentries = scandir(tempdir, &direntries, notdotentries,
3066
alphasort);
3067
#endif /* not __GLIBC__ */
3068
if(numentries >= 0){
3069
for(int i = 0; i < numentries; i++){
3070
ret = unlinkat(tempdir_fd, direntries[i]->d_name, 0);
3071
if(ret == -1){
3072
fprintf_plus(stderr, "unlinkat(open(\"%s\", O_RDONLY),"
3073
" \"%s\", 0): %s\n", tempdir,
3074
direntries[i]->d_name, strerror(errno));
3075
}
3076
free(direntries[i]);
3077
}
3078
3079
/* need to clean even if 0 because man page doesn't specify */
3080
free(direntries);
3081
if(numentries == -1){
3082
perror_plus("scandir");
3083
}
3084
ret = rmdir(tempdir);
3085
if(ret == -1 and errno != ENOENT){
3086
perror_plus("rmdir");
3087
}
3088
}
3089
close(tempdir_fd);
3090
}
3110
3091
}
3111
3092
3112
3093
if(quit_now){
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0