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- Committer: Teddy Hogeborn
- Date: 2016-06-21 19:47:30 UTC
- mfrom: (237.7.402 trunk)
- Revision ID: teddy@recompile.se-20160621194730-sb4zcfg961tvuic2
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 © 2008-2015 Teddy Hogeborn
13
* Copyright © 2008-2015 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
57
57
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
58
58
inet_pton(), connect(),
59
59
getnameinfo() */
60
#include <fcntl.h> /* open(), unlinkat() */
60
#include <fcntl.h> /* open(), unlinkat(), AT_REMOVEDIR */
61
61
#include <dirent.h> /* opendir(), struct dirent, readdir()
62
62
*/
63
63
#include <inttypes.h> /* PRIu16, PRIdMAX, intmax_t,
64
64
strtoimax() */
65
#include <errno.h> /* perror(), errno,
65
#include <errno.h> /* perror(), errno, EINTR, EINVAL,
66
EAI_SYSTEM, ENETUNREACH,
67
EHOSTUNREACH, ECONNREFUSED, EPROTO,
68
EIO, ENOENT, ENXIO, ENOMEM, EISDIR,
69
ENOTEMPTY,
66
70
program_invocation_short_name */
67
71
#include <time.h> /* nanosleep(), time(), sleep() */
68
72
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
513
517
fprintf_plus(stderr, "GnuTLS: %s", string);
514
518
}
515
519
516
__attribute__((nonnull, warn_unused_result))
520
__attribute__((nonnull(1, 2, 4), warn_unused_result))
517
521
static int init_gnutls_global(const char *pubkeyfilename,
518
522
const char *seckeyfilename,
519
523
const char *dhparamsfilename,
525
529
fprintf_plus(stderr, "Initializing GnuTLS\n");
526
530
}
527
531
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
535
532
if(debug){
536
533
/* "Use a log level over 10 to enable all debugging options."
537
534
* - GnuTLS manual
545
542
if(ret != GNUTLS_E_SUCCESS){
546
543
fprintf_plus(stderr, "GnuTLS memory error: %s\n",
547
544
safer_gnutls_strerror(ret));
548
gnutls_global_deinit();
549
545
return -1;
550
546
}
551
547
755
751
globalfail:
756
752
757
753
gnutls_certificate_free_credentials(mc->cred);
758
gnutls_global_deinit();
759
754
gnutls_dh_params_deinit(mc->dh_params);
760
755
return -1;
761
756
}
822
817
823
818
/* Set effective uid to 0, return errno */
824
819
__attribute__((warn_unused_result))
825
error_t raise_privileges(void){
826
error_t old_errno = errno;
827
error_t ret_errno = 0;
820
int raise_privileges(void){
821
int old_errno = errno;
822
int ret = 0;
828
823
if(seteuid(0) == -1){
829
ret_errno = errno;
824
ret = errno;
830
825
}
831
826
errno = old_errno;
832
return ret_errno;
827
return ret;
833
828
}
834
829
835
830
/* Set effective and real user ID to 0. Return errno. */
836
831
__attribute__((warn_unused_result))
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){
832
int raise_privileges_permanently(void){
833
int old_errno = errno;
834
int ret = raise_privileges();
835
if(ret != 0){
841
836
errno = old_errno;
842
return ret_errno;
837
return ret;
843
838
}
844
839
if(setuid(0) == -1){
845
ret_errno = errno;
840
ret = errno;
846
841
}
847
842
errno = old_errno;
848
return ret_errno;
843
return ret;
849
844
}
850
845
851
846
/* Set effective user ID to unprivileged saved user ID */
852
847
__attribute__((warn_unused_result))
853
error_t lower_privileges(void){
854
error_t old_errno = errno;
855
error_t ret_errno = 0;
848
int lower_privileges(void){
849
int old_errno = errno;
850
int ret = 0;
856
851
if(seteuid(uid) == -1){
857
ret_errno = errno;
852
ret = errno;
858
853
}
859
854
errno = old_errno;
860
return ret_errno;
855
return ret;
861
856
}
862
857
863
858
/* Lower privileges permanently */
864
859
__attribute__((warn_unused_result))
865
error_t lower_privileges_permanently(void){
866
error_t old_errno = errno;
867
error_t ret_errno = 0;
860
int lower_privileges_permanently(void){
861
int old_errno = errno;
862
int ret = 0;
868
863
if(setuid(uid) == -1){
869
ret_errno = errno;
864
ret = errno;
870
865
}
871
866
errno = old_errno;
872
return ret_errno;
867
return ret;
873
868
}
874
869
875
870
/* Helper function to add_local_route() and delete_local_route() */
1628
1623
__attribute__((nonnull, warn_unused_result))
1629
1624
bool get_flags(const char *ifname, struct ifreq *ifr){
1630
1625
int ret;
1631
error_t ret_errno;
1626
int old_errno;
1632
1627
1633
1628
int s = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1634
1629
if(s < 0){
1635
ret_errno = errno;
1630
old_errno = errno;
1636
1631
perror_plus("socket");
1637
errno = ret_errno;
1632
errno = old_errno;
1638
1633
return false;
1639
1634
}
1640
1635
strncpy(ifr->ifr_name, ifname, IF_NAMESIZE);
1642
1637
ret = ioctl(s, SIOCGIFFLAGS, ifr);
1643
1638
if(ret == -1){
1644
1639
if(debug){
1645
ret_errno = errno;
1640
old_errno = errno;
1646
1641
perror_plus("ioctl SIOCGIFFLAGS");
1647
errno = ret_errno;
1642
errno = old_errno;
1648
1643
}
1649
1644
return false;
1650
1645
}
1914
1909
return;
1915
1910
}
1916
1911
}
1917
#ifdef __GLIBC__
1918
#if __GLIBC_PREREQ(2, 15)
1919
1912
int numhooks = scandirat(hookdir_fd, ".", &direntries,
1920
1913
runnable_hook, alphasort);
1921
#else /* not __GLIBC_PREREQ(2, 15) */
1922
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1923
alphasort);
1924
#endif /* not __GLIBC_PREREQ(2, 15) */
1925
#else /* not __GLIBC__ */
1926
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1927
alphasort);
1928
#endif /* not __GLIBC__ */
1929
1914
if(numhooks == -1){
1930
1915
perror_plus("scandir");
1931
1916
return;
2086
2071
}
2087
2072
2088
2073
__attribute__((nonnull, warn_unused_result))
2089
error_t bring_up_interface(const char *const interface,
2090
const float delay){
2091
error_t old_errno = errno;
2074
int bring_up_interface(const char *const interface,
2075
const float delay){
2076
int old_errno = errno;
2092
2077
int ret;
2093
2078
struct ifreq network;
2094
2079
unsigned int if_index = if_nametoindex(interface);
2104
2089
}
2105
2090
2106
2091
if(not interface_is_up(interface)){
2107
error_t ret_errno = 0, ioctl_errno = 0;
2092
int ret_errno = 0;
2093
int ioctl_errno = 0;
2108
2094
if(not get_flags(interface, &network)){
2109
2095
ret_errno = errno;
2110
2096
fprintf_plus(stderr, "Failed to get flags for interface "
2213
2199
}
2214
2200
2215
2201
__attribute__((nonnull, warn_unused_result))
2216
error_t take_down_interface(const char *const interface){
2217
error_t old_errno = errno;
2202
int take_down_interface(const char *const interface){
2203
int old_errno = errno;
2218
2204
struct ifreq network;
2219
2205
unsigned int if_index = if_nametoindex(interface);
2220
2206
if(if_index == 0){
2223
2209
return ENXIO;
2224
2210
}
2225
2211
if(interface_is_up(interface)){
2226
error_t ret_errno = 0, ioctl_errno = 0;
2212
int ret_errno = 0;
2213
int ioctl_errno = 0;
2227
2214
if(not get_flags(interface, &network) and debug){
2228
2215
ret_errno = errno;
2229
2216
fprintf_plus(stderr, "Failed to get flags for interface "
2479
2466
.args_doc = "",
2480
2467
.doc = "Mandos client -- Get and decrypt"
2481
2468
" passwords from a Mandos server" };
2482
ret = argp_parse(&argp, argc, argv,
2483
ARGP_IN_ORDER | ARGP_NO_HELP, 0, NULL);
2484
switch(ret){
2469
ret_errno = argp_parse(&argp, argc, argv,
2470
ARGP_IN_ORDER | ARGP_NO_HELP, 0, NULL);
2471
switch(ret_errno){
2485
2472
case 0:
2486
2473
break;
2487
2474
case ENOMEM:
2488
2475
default:
2489
errno = ret;
2476
errno = ret_errno;
2490
2477
perror_plus("argp_parse");
2491
2478
exitcode = EX_OSERR;
2492
2479
goto end;
2501
2488
<http://bugs.debian.org/633582> */
2502
2489
2503
2490
/* Re-raise privileges */
2504
ret_errno = raise_privileges();
2505
if(ret_errno != 0){
2506
errno = ret_errno;
2491
ret = raise_privileges();
2492
if(ret != 0){
2493
errno = ret;
2507
2494
perror_plus("Failed to raise privileges");
2508
2495
} else {
2509
2496
struct stat st;
2573
2560
}
2574
2561
2575
2562
/* Lower privileges */
2576
ret_errno = lower_privileges();
2577
if(ret_errno != 0){
2578
errno = ret_errno;
2563
ret = lower_privileges();
2564
if(ret != 0){
2565
errno = ret;
2579
2566
perror_plus("Failed to lower privileges");
2580
2567
}
2581
2568
}
2909
2896
2910
2897
/* Allocate a new server */
2911
2898
mc.server = avahi_server_new(avahi_simple_poll_get(simple_poll),
2912
&config, NULL, NULL, &ret_errno);
2899
&config, NULL, NULL, &ret);
2913
2900
2914
2901
/* Free the Avahi configuration data */
2915
2902
avahi_server_config_free(&config);
2918
2905
/* Check if creating the Avahi server object succeeded */
2919
2906
if(mc.server == NULL){
2920
2907
fprintf_plus(stderr, "Failed to create Avahi server: %s\n",
2921
avahi_strerror(ret_errno));
2908
avahi_strerror(ret));
2922
2909
exitcode = EX_UNAVAILABLE;
2923
2910
goto end;
2924
2911
}
2976
2963
2977
2964
if(gnutls_initialized){
2978
2965
gnutls_certificate_free_credentials(mc.cred);
2979
gnutls_global_deinit();
2980
2966
gnutls_dh_params_deinit(mc.dh_params);
2981
2967
}
2982
2968
3005
2991
3006
2992
/* Re-raise privileges */
3007
2993
{
3008
ret_errno = raise_privileges();
3009
if(ret_errno != 0){
3010
errno = ret_errno;
2994
ret = raise_privileges();
2995
if(ret != 0){
2996
errno = ret;
3011
2997
perror_plus("Failed to raise privileges");
3012
2998
} else {
3013
2999
3021
3007
while((interface=argz_next(interfaces_to_take_down,
3022
3008
interfaces_to_take_down_size,
3023
3009
interface))){
3024
ret_errno = take_down_interface(interface);
3025
if(ret_errno != 0){
3026
errno = ret_errno;
3010
ret = take_down_interface(interface);
3011
if(ret != 0){
3012
errno = ret;
3027
3013
perror_plus("Failed to take down interface");
3028
3014
}
3029
3015
}
3034
3020
}
3035
3021
}
3036
3022
3037
ret_errno = lower_privileges_permanently();
3038
if(ret_errno != 0){
3039
errno = ret_errno;
3023
ret = lower_privileges_permanently();
3024
if(ret != 0){
3025
errno = ret;
3040
3026
perror_plus("Failed to lower privileges permanently");
3041
3027
}
3042
3028
}
3044
3030
free(interfaces_to_take_down);
3045
3031
free(interfaces_hooks);
3046
3032
3033
void clean_dir_at(int base, const char * const dirname,
3034
uintmax_t level){
3035
struct dirent **direntries = NULL;
3036
int dret;
3037
int dir_fd = (int)TEMP_FAILURE_RETRY(openat(base, dirname,
3038
O_RDONLY
3039
| O_NOFOLLOW
3040
| O_DIRECTORY
3041
| O_PATH));
3042
if(dir_fd == -1){
3043
perror_plus("open");
3044
}
3045
int numentries = scandirat(dir_fd, ".", &direntries,
3046
notdotentries, alphasort);
3047
if(numentries >= 0){
3048
for(int i = 0; i < numentries; i++){
3049
if(debug){
3050
fprintf_plus(stderr, "Unlinking \"%s/%s\"\n",
3051
dirname, direntries[i]->d_name);
3052
}
3053
dret = unlinkat(dir_fd, direntries[i]->d_name, 0);
3054
if(dret == -1){
3055
if(errno == EISDIR){
3056
dret = unlinkat(dir_fd, direntries[i]->d_name,
3057
AT_REMOVEDIR);
3058
}
3059
if((dret == -1) and (errno == ENOTEMPTY)
3060
and (strcmp(direntries[i]->d_name, "private-keys-v1.d")
3061
== 0) and (level == 0)){
3062
/* Recurse only in this special case */
3063
clean_dir_at(dir_fd, direntries[i]->d_name, level+1);
3064
dret = 0;
3065
}
3066
if(dret == -1){
3067
fprintf_plus(stderr, "unlink(\"%s/%s\"): %s\n", dirname,
3068
direntries[i]->d_name, strerror(errno));
3069
}
3070
}
3071
free(direntries[i]);
3072
}
3073
3074
/* need to clean even if 0 because man page doesn't specify */
3075
free(direntries);
3076
if(numentries == -1){
3077
perror_plus("scandirat");
3078
}
3079
dret = unlinkat(base, dirname, AT_REMOVEDIR);
3080
if(dret == -1 and errno != ENOENT){
3081
perror_plus("rmdir");
3082
}
3083
} else {
3084
perror_plus("scandirat");
3085
}
3086
close(dir_fd);
3087
}
3088
3047
3089
/* Removes the GPGME temp directory and all files inside */
3048
3090
if(tempdir != NULL){
3049
struct dirent **direntries = NULL;
3050
int tempdir_fd = (int)TEMP_FAILURE_RETRY(open(tempdir, O_RDONLY
3051
| O_NOFOLLOW
3052
| O_DIRECTORY
3053
| O_PATH));
3054
if(tempdir_fd == -1){
3055
perror_plus("open");
3056
} else {
3057
#ifdef __GLIBC__
3058
#if __GLIBC_PREREQ(2, 15)
3059
int numentries = scandirat(tempdir_fd, ".", &direntries,
3060
notdotentries, alphasort);
3061
#else /* not __GLIBC_PREREQ(2, 15) */
3062
int numentries = scandir(tempdir, &direntries, notdotentries,
3063
alphasort);
3064
#endif /* not __GLIBC_PREREQ(2, 15) */
3065
#else /* not __GLIBC__ */
3066
int numentries = scandir(tempdir, &direntries, notdotentries,
3067
alphasort);
3068
#endif /* not __GLIBC__ */
3069
if(numentries >= 0){
3070
for(int i = 0; i < numentries; i++){
3071
ret = unlinkat(tempdir_fd, direntries[i]->d_name, 0);
3072
if(ret == -1){
3073
fprintf_plus(stderr, "unlinkat(open(\"%s\", O_RDONLY),"
3074
" \"%s\", 0): %s\n", tempdir,
3075
direntries[i]->d_name, strerror(errno));
3076
}
3077
free(direntries[i]);
3078
}
3079
3080
/* need to clean even if 0 because man page doesn't specify */
3081
free(direntries);
3082
if(numentries == -1){
3083
perror_plus("scandir");
3084
}
3085
ret = rmdir(tempdir);
3086
if(ret == -1 and errno != ENOENT){
3087
perror_plus("rmdir");
3088
}
3089
}
3090
close(tempdir_fd);
3091
}
3091
clean_dir_at(-1, tempdir, 0);
3092
3092
}
3093
3093
3094
3094
if(quit_now){
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0