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- Committer: Teddy Hogeborn
- Date: 2016-03-19 22:00:38 UTC
- mto: This revision was merged to the branch mainline in revision 843.
- Revision ID: teddy@recompile.se-20160319220038-mexjdy1ct3wzld5t
Tags: version-1.7.7-1
* Makefile (version): Changed to "1.7.7".
* NEWS (Version 1.7.7): New entry.
* debian/changelog (1.7.7-1): - '' -
* NEWS (Version 1.7.7): New entry.
* debian/changelog (1.7.7-1): - '' -
added
removed
plugins.d/mandos-client.c
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
}
2076
2071
}
2077
2072
2078
2073
__attribute__((nonnull, warn_unused_result))
2079
error_t bring_up_interface(const char *const interface,
2080
const float delay){
2081
error_t old_errno = errno;
2074
int bring_up_interface(const char *const interface,
2075
const float delay){
2076
int old_errno = errno;
2082
2077
int ret;
2083
2078
struct ifreq network;
2084
2079
unsigned int if_index = if_nametoindex(interface);
2094
2089
}
2095
2090
2096
2091
if(not interface_is_up(interface)){
2097
error_t ret_errno = 0, ioctl_errno = 0;
2092
int ret_errno = 0;
2093
int ioctl_errno = 0;
2098
2094
if(not get_flags(interface, &network)){
2099
2095
ret_errno = errno;
2100
2096
fprintf_plus(stderr, "Failed to get flags for interface "
2203
2199
}
2204
2200
2205
2201
__attribute__((nonnull, warn_unused_result))
2206
error_t take_down_interface(const char *const interface){
2207
error_t old_errno = errno;
2202
int take_down_interface(const char *const interface){
2203
int old_errno = errno;
2208
2204
struct ifreq network;
2209
2205
unsigned int if_index = if_nametoindex(interface);
2210
2206
if(if_index == 0){
2213
2209
return ENXIO;
2214
2210
}
2215
2211
if(interface_is_up(interface)){
2216
error_t ret_errno = 0, ioctl_errno = 0;
2212
int ret_errno = 0;
2213
int ioctl_errno = 0;
2217
2214
if(not get_flags(interface, &network) and debug){
2218
2215
ret_errno = errno;
2219
2216
fprintf_plus(stderr, "Failed to get flags for interface "
2469
2466
.args_doc = "",
2470
2467
.doc = "Mandos client -- Get and decrypt"
2471
2468
" passwords from a Mandos server" };
2472
ret = argp_parse(&argp, argc, argv,
2473
ARGP_IN_ORDER | ARGP_NO_HELP, 0, NULL);
2474
switch(ret){
2469
ret_errno = argp_parse(&argp, argc, argv,
2470
ARGP_IN_ORDER | ARGP_NO_HELP, 0, NULL);
2471
switch(ret_errno){
2475
2472
case 0:
2476
2473
break;
2477
2474
case ENOMEM:
2478
2475
default:
2479
errno = ret;
2476
errno = ret_errno;
2480
2477
perror_plus("argp_parse");
2481
2478
exitcode = EX_OSERR;
2482
2479
goto end;
2491
2488
<http://bugs.debian.org/633582> */
2492
2489
2493
2490
/* Re-raise privileges */
2494
ret_errno = raise_privileges();
2495
if(ret_errno != 0){
2496
errno = ret_errno;
2491
ret = raise_privileges();
2492
if(ret != 0){
2493
errno = ret;
2497
2494
perror_plus("Failed to raise privileges");
2498
2495
} else {
2499
2496
struct stat st;
2563
2560
}
2564
2561
2565
2562
/* Lower privileges */
2566
ret_errno = lower_privileges();
2567
if(ret_errno != 0){
2568
errno = ret_errno;
2563
ret = lower_privileges();
2564
if(ret != 0){
2565
errno = ret;
2569
2566
perror_plus("Failed to lower privileges");
2570
2567
}
2571
2568
}
2899
2896
2900
2897
/* Allocate a new server */
2901
2898
mc.server = avahi_server_new(avahi_simple_poll_get(simple_poll),
2902
&config, NULL, NULL, &ret_errno);
2899
&config, NULL, NULL, &ret);
2903
2900
2904
2901
/* Free the Avahi configuration data */
2905
2902
avahi_server_config_free(&config);
2908
2905
/* Check if creating the Avahi server object succeeded */
2909
2906
if(mc.server == NULL){
2910
2907
fprintf_plus(stderr, "Failed to create Avahi server: %s\n",
2911
avahi_strerror(ret_errno));
2908
avahi_strerror(ret));
2912
2909
exitcode = EX_UNAVAILABLE;
2913
2910
goto end;
2914
2911
}
2966
2963
2967
2964
if(gnutls_initialized){
2968
2965
gnutls_certificate_free_credentials(mc.cred);
2969
gnutls_global_deinit();
2970
2966
gnutls_dh_params_deinit(mc.dh_params);
2971
2967
}
2972
2968
2995
2991
2996
2992
/* Re-raise privileges */
2997
2993
{
2998
ret_errno = raise_privileges();
2999
if(ret_errno != 0){
3000
errno = ret_errno;
2994
ret = raise_privileges();
2995
if(ret != 0){
2996
errno = ret;
3001
2997
perror_plus("Failed to raise privileges");
3002
2998
} else {
3003
2999
3011
3007
while((interface=argz_next(interfaces_to_take_down,
3012
3008
interfaces_to_take_down_size,
3013
3009
interface))){
3014
ret_errno = take_down_interface(interface);
3015
if(ret_errno != 0){
3016
errno = ret_errno;
3010
ret = take_down_interface(interface);
3011
if(ret != 0){
3012
errno = ret;
3017
3013
perror_plus("Failed to take down interface");
3018
3014
}
3019
3015
}
3024
3020
}
3025
3021
}
3026
3022
3027
ret_errno = lower_privileges_permanently();
3028
if(ret_errno != 0){
3029
errno = ret_errno;
3023
ret = lower_privileges_permanently();
3024
if(ret != 0){
3025
errno = ret;
3030
3026
perror_plus("Failed to lower privileges permanently");
3031
3027
}
3032
3028
}
3034
3030
free(interfaces_to_take_down);
3035
3031
free(interfaces_hooks);
3036
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
3037
3089
/* Removes the GPGME temp directory and all files inside */
3038
3090
if(tempdir != NULL){
3039
struct dirent **direntries = NULL;
3040
int tempdir_fd = (int)TEMP_FAILURE_RETRY(open(tempdir, O_RDONLY
3041
| O_NOFOLLOW
3042
| O_DIRECTORY
3043
| O_PATH));
3044
if(tempdir_fd == -1){
3045
perror_plus("open");
3046
} else {
3047
int numentries = scandirat(tempdir_fd, ".", &direntries,
3048
notdotentries, alphasort);
3049
if(numentries >= 0){
3050
for(int i = 0; i < numentries; i++){
3051
ret = unlinkat(tempdir_fd, direntries[i]->d_name, 0);
3052
if(ret == -1){
3053
fprintf_plus(stderr, "unlinkat(open(\"%s\", O_RDONLY),"
3054
" \"%s\", 0): %s\n", tempdir,
3055
direntries[i]->d_name, strerror(errno));
3056
}
3057
free(direntries[i]);
3058
}
3059
3060
/* need to clean even if 0 because man page doesn't specify */
3061
free(direntries);
3062
if(numentries == -1){
3063
perror_plus("scandir");
3064
}
3065
ret = rmdir(tempdir);
3066
if(ret == -1 and errno != ENOENT){
3067
perror_plus("rmdir");
3068
}
3069
}
3070
close(tempdir_fd);
3071
}
3091
clean_dir_at(-1, tempdir, 0);
3072
3092
}
3073
3093
3074
3094
if(quit_now){
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