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- Committer: Teddy Hogeborn
- Date: 2016-06-21 20:47:59 UTC
- mfrom: (237.4.76 release)
- Revision ID: teddy@recompile.se-20160621204759-18sq8k9ihnplz6x7
Merge from release branch
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
47
47
strtof(), abort() */
48
48
#include <stdbool.h> /* bool, false, true */
49
49
#include <string.h> /* strcmp(), strlen(), strerror(),
50
asprintf(), strcpy() */
50
asprintf(), strncpy() */
51
51
#include <sys/ioctl.h> /* ioctl */
52
52
#include <sys/types.h> /* socket(), inet_pton(), sockaddr,
53
53
sockaddr_in6, PF_INET6,
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
strcpy(ifr->ifr_name, ifname);
1635
strncpy(ifr->ifr_name, ifname, IF_NAMESIZE);
1636
ifr->ifr_name[IF_NAMESIZE-1] = '\0'; /* NUL terminate */
1641
1637
ret = ioctl(s, SIOCGIFFLAGS, ifr);
1642
1638
if(ret == -1){
1643
1639
if(debug){
1644
ret_errno = errno;
1640
old_errno = errno;
1645
1641
perror_plus("ioctl SIOCGIFFLAGS");
1646
errno = ret_errno;
1642
errno = old_errno;
1647
1643
}
1648
1644
return false;
1649
1645
}
1913
1909
return;
1914
1910
}
1915
1911
}
1916
#ifdef __GLIBC__
1917
#if __GLIBC_PREREQ(2, 15)
1918
1912
int numhooks = scandirat(hookdir_fd, ".", &direntries,
1919
1913
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__ */
1928
1914
if(numhooks == -1){
1929
1915
perror_plus("scandir");
1930
1916
return;
2085
2071
}
2086
2072
2087
2073
__attribute__((nonnull, warn_unused_result))
2088
error_t bring_up_interface(const char *const interface,
2089
const float delay){
2090
error_t old_errno = errno;
2074
int bring_up_interface(const char *const interface,
2075
const float delay){
2076
int old_errno = errno;
2091
2077
int ret;
2092
2078
struct ifreq network;
2093
2079
unsigned int if_index = if_nametoindex(interface);
2103
2089
}
2104
2090
2105
2091
if(not interface_is_up(interface)){
2106
error_t ret_errno = 0, ioctl_errno = 0;
2092
int ret_errno = 0;
2093
int ioctl_errno = 0;
2107
2094
if(not get_flags(interface, &network)){
2108
2095
ret_errno = errno;
2109
2096
fprintf_plus(stderr, "Failed to get flags for interface "
2212
2199
}
2213
2200
2214
2201
__attribute__((nonnull, warn_unused_result))
2215
error_t take_down_interface(const char *const interface){
2216
error_t old_errno = errno;
2202
int take_down_interface(const char *const interface){
2203
int old_errno = errno;
2217
2204
struct ifreq network;
2218
2205
unsigned int if_index = if_nametoindex(interface);
2219
2206
if(if_index == 0){
2222
2209
return ENXIO;
2223
2210
}
2224
2211
if(interface_is_up(interface)){
2225
error_t ret_errno = 0, ioctl_errno = 0;
2212
int ret_errno = 0;
2213
int ioctl_errno = 0;
2226
2214
if(not get_flags(interface, &network) and debug){
2227
2215
ret_errno = errno;
2228
2216
fprintf_plus(stderr, "Failed to get flags for interface "
2478
2466
.args_doc = "",
2479
2467
.doc = "Mandos client -- Get and decrypt"
2480
2468
" passwords from a Mandos server" };
2481
ret = argp_parse(&argp, argc, argv,
2482
ARGP_IN_ORDER | ARGP_NO_HELP, 0, NULL);
2483
switch(ret){
2469
ret_errno = argp_parse(&argp, argc, argv,
2470
ARGP_IN_ORDER | ARGP_NO_HELP, 0, NULL);
2471
switch(ret_errno){
2484
2472
case 0:
2485
2473
break;
2486
2474
case ENOMEM:
2487
2475
default:
2488
errno = ret;
2476
errno = ret_errno;
2489
2477
perror_plus("argp_parse");
2490
2478
exitcode = EX_OSERR;
2491
2479
goto end;
2500
2488
<http://bugs.debian.org/633582> */
2501
2489
2502
2490
/* Re-raise privileges */
2503
ret_errno = raise_privileges();
2504
if(ret_errno != 0){
2505
errno = ret_errno;
2491
ret = raise_privileges();
2492
if(ret != 0){
2493
errno = ret;
2506
2494
perror_plus("Failed to raise privileges");
2507
2495
} else {
2508
2496
struct stat st;
2572
2560
}
2573
2561
2574
2562
/* Lower privileges */
2575
ret_errno = lower_privileges();
2576
if(ret_errno != 0){
2577
errno = ret_errno;
2563
ret = lower_privileges();
2564
if(ret != 0){
2565
errno = ret;
2578
2566
perror_plus("Failed to lower privileges");
2579
2567
}
2580
2568
}
2908
2896
2909
2897
/* Allocate a new server */
2910
2898
mc.server = avahi_server_new(avahi_simple_poll_get(simple_poll),
2911
&config, NULL, NULL, &ret_errno);
2899
&config, NULL, NULL, &ret);
2912
2900
2913
2901
/* Free the Avahi configuration data */
2914
2902
avahi_server_config_free(&config);
2917
2905
/* Check if creating the Avahi server object succeeded */
2918
2906
if(mc.server == NULL){
2919
2907
fprintf_plus(stderr, "Failed to create Avahi server: %s\n",
2920
avahi_strerror(ret_errno));
2908
avahi_strerror(ret));
2921
2909
exitcode = EX_UNAVAILABLE;
2922
2910
goto end;
2923
2911
}
2975
2963
2976
2964
if(gnutls_initialized){
2977
2965
gnutls_certificate_free_credentials(mc.cred);
2978
gnutls_global_deinit();
2979
2966
gnutls_dh_params_deinit(mc.dh_params);
2980
2967
}
2981
2968
3004
2991
3005
2992
/* Re-raise privileges */
3006
2993
{
3007
ret_errno = raise_privileges();
3008
if(ret_errno != 0){
3009
errno = ret_errno;
2994
ret = raise_privileges();
2995
if(ret != 0){
2996
errno = ret;
3010
2997
perror_plus("Failed to raise privileges");
3011
2998
} else {
3012
2999
3020
3007
while((interface=argz_next(interfaces_to_take_down,
3021
3008
interfaces_to_take_down_size,
3022
3009
interface))){
3023
ret_errno = take_down_interface(interface);
3024
if(ret_errno != 0){
3025
errno = ret_errno;
3010
ret = take_down_interface(interface);
3011
if(ret != 0){
3012
errno = ret;
3026
3013
perror_plus("Failed to take down interface");
3027
3014
}
3028
3015
}
3033
3020
}
3034
3021
}
3035
3022
3036
ret_errno = lower_privileges_permanently();
3037
if(ret_errno != 0){
3038
errno = ret_errno;
3023
ret = lower_privileges_permanently();
3024
if(ret != 0){
3025
errno = ret;
3039
3026
perror_plus("Failed to lower privileges permanently");
3040
3027
}
3041
3028
}
3043
3030
free(interfaces_to_take_down);
3044
3031
free(interfaces_hooks);
3045
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
3046
3089
/* Removes the GPGME temp directory and all files inside */
3047
3090
if(tempdir != NULL){
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
}
3091
clean_dir_at(-1, tempdir, 0);
3091
3092
}
3092
3093
3093
3094
if(quit_now){
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0