9
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* "browse_callback", and parts of "main".
11
11
* Everything else is
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* Copyright © 2008-2016 Teddy Hogeborn
13
* Copyright © 2008-2016 Björn Påhlsson
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* This program is free software: you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation, either version 3 of the
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* License, or (at your option) any later version.
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* This program is distributed in the hope that it will be useful, but
12
* Copyright © 2008-2018 Teddy Hogeborn
13
* Copyright © 2008-2018 Björn Påhlsson
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* This file is part of Mandos.
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* Mandos is free software: you can redistribute it and/or modify it
18
* under the terms of the GNU General Public License as published by
19
* the Free Software Foundation, either version 3 of the License, or
20
* (at your option) any later version.
22
* Mandos is distributed in the hope that it will be useful, but
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23
* WITHOUT ANY WARRANTY; without even the implied warranty of
22
24
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
23
25
* General Public License for more details.
25
27
* You should have received a copy of the GNU General Public License
26
* along with this program. If not, see
27
* <http://www.gnu.org/licenses/>.
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* along with Mandos. If not, see <http://www.gnu.org/licenses/>.
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* Contact the authors at <mandos@recompile.se>.
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strtof(), abort() */
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49
#include <stdbool.h> /* bool, false, true */
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#include <string.h> /* strcmp(), strlen(), strerror(),
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asprintf(), strncpy() */
51
asprintf(), strncpy(), strsignal()
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#include <sys/ioctl.h> /* ioctl */
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#include <sys/types.h> /* socket(), inet_pton(), sockaddr,
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sockaddr_in6, PF_INET6,
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#include <sys/socket.h> /* socket(), struct sockaddr_in6,
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inet_pton(), connect(),
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#include <fcntl.h> /* open(), unlinkat() */
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#include <fcntl.h> /* open(), unlinkat(), AT_REMOVEDIR */
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#include <dirent.h> /* opendir(), struct dirent, readdir()
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#include <inttypes.h> /* PRIu16, PRIdMAX, intmax_t,
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#include <errno.h> /* perror(), errno,
67
#include <errno.h> /* perror(), errno, EINTR, EINVAL,
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EAI_SYSTEM, ENETUNREACH,
69
EHOSTUNREACH, ECONNREFUSED, EPROTO,
70
EIO, ENOENT, ENXIO, ENOMEM, EISDIR,
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72
program_invocation_short_name */
67
73
#include <time.h> /* nanosleep(), time(), sleep() */
68
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#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
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/* Set effective uid to 0, return errno */
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__attribute__((warn_unused_result))
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error_t raise_privileges(void){
826
error_t old_errno = errno;
827
error_t ret_errno = 0;
823
int raise_privileges(void){
824
int old_errno = errno;
828
826
if(seteuid(0) == -1){
831
829
errno = old_errno;
835
833
/* Set effective and real user ID to 0. Return errno. */
836
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__attribute__((warn_unused_result))
837
error_t raise_privileges_permanently(void){
838
error_t old_errno = errno;
839
error_t ret_errno = raise_privileges();
835
int raise_privileges_permanently(void){
836
int old_errno = errno;
837
int ret = raise_privileges();
841
839
errno = old_errno;
844
842
if(setuid(0) == -1){
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errno = old_errno;
851
849
/* Set effective user ID to unprivileged saved user ID */
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__attribute__((warn_unused_result))
853
error_t lower_privileges(void){
854
error_t old_errno = errno;
855
error_t ret_errno = 0;
851
int lower_privileges(void){
852
int old_errno = errno;
856
854
if(seteuid(uid) == -1){
859
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errno = old_errno;
863
861
/* Lower privileges permanently */
864
862
__attribute__((warn_unused_result))
865
error_t lower_privileges_permanently(void){
866
error_t old_errno = errno;
867
error_t ret_errno = 0;
863
int lower_privileges_permanently(void){
864
int old_errno = errno;
868
866
if(setuid(uid) == -1){
871
869
errno = old_errno;
875
873
/* Helper function to add_local_route() and delete_local_route() */
1926
int devnull = (int)TEMP_FAILURE_RETRY(open("/dev/null", O_RDONLY));
1928
perror_plus("open(\"/dev/null\", O_RDONLY)");
1917
1931
int numhooks = scandirat(hookdir_fd, ".", &direntries,
1918
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runnable_hook, alphasort);
1919
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if(numhooks == -1){
1920
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perror_plus("scandir");
1923
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struct dirent *direntry;
1925
int devnull = (int)TEMP_FAILURE_RETRY(open("/dev/null", O_RDONLY));
1927
perror_plus("open(\"/dev/null\", O_RDONLY)");
1930
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for(int i = 0; i < numhooks; i++){
1931
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direntry = direntries[i];
2469
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.args_doc = "",
2470
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.doc = "Mandos client -- Get and decrypt"
2471
2483
" passwords from a Mandos server" };
2472
ret = argp_parse(&argp, argc, argv,
2473
ARGP_IN_ORDER | ARGP_NO_HELP, 0, NULL);
2484
ret_errno = argp_parse(&argp, argc, argv,
2485
ARGP_IN_ORDER | ARGP_NO_HELP, 0, NULL);
2480
2492
perror_plus("argp_parse");
2481
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exitcode = EX_OSERR;
2900
2912
/* Allocate a new server */
2901
2913
mc.server = avahi_server_new(avahi_simple_poll_get(simple_poll),
2902
&config, NULL, NULL, &ret_errno);
2914
&config, NULL, NULL, &ret);
2904
2916
/* Free the Avahi configuration data */
2905
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avahi_server_config_free(&config);
2952
fprintf_plus(stderr, "%s exiting\n", argv[0]);
2964
if(signal_received){
2965
fprintf_plus(stderr, "%s exiting due to signal %d: %s\n",
2966
argv[0], signal_received,
2967
strsignal(signal_received));
2969
fprintf_plus(stderr, "%s exiting\n", argv[0]);
2955
2973
/* Cleanup things */
3008
3025
/* Take down the network interfaces which were brought up */
3010
3027
char *interface = NULL;
3011
while((interface=argz_next(interfaces_to_take_down,
3012
interfaces_to_take_down_size,
3014
ret_errno = take_down_interface(interface);
3028
while((interface = argz_next(interfaces_to_take_down,
3029
interfaces_to_take_down_size,
3031
ret = take_down_interface(interface);
3017
3034
perror_plus("Failed to take down interface");
3034
3051
free(interfaces_to_take_down);
3035
3052
free(interfaces_hooks);
3054
void clean_dir_at(int base, const char * const dirname,
3056
struct dirent **direntries = NULL;
3058
int dir_fd = (int)TEMP_FAILURE_RETRY(openat(base, dirname,
3064
perror_plus("open");
3066
int numentries = scandirat(dir_fd, ".", &direntries,
3067
notdotentries, alphasort);
3068
if(numentries >= 0){
3069
for(int i = 0; i < numentries; i++){
3071
fprintf_plus(stderr, "Unlinking \"%s/%s\"\n",
3072
dirname, direntries[i]->d_name);
3074
dret = unlinkat(dir_fd, direntries[i]->d_name, 0);
3076
if(errno == EISDIR){
3077
dret = unlinkat(dir_fd, direntries[i]->d_name,
3080
if((dret == -1) and (errno == ENOTEMPTY)
3081
and (strcmp(direntries[i]->d_name, "private-keys-v1.d")
3082
== 0) and (level == 0)){
3083
/* Recurse only in this special case */
3084
clean_dir_at(dir_fd, direntries[i]->d_name, level+1);
3087
if((dret == -1) and (errno != ENOENT)){
3088
fprintf_plus(stderr, "unlink(\"%s/%s\"): %s\n", dirname,
3089
direntries[i]->d_name, strerror(errno));
3092
free(direntries[i]);
3095
/* need to clean even if 0 because man page doesn't specify */
3097
if(numentries == -1){
3098
perror_plus("scandirat");
3100
dret = unlinkat(base, dirname, AT_REMOVEDIR);
3101
if(dret == -1 and errno != ENOENT){
3102
perror_plus("rmdir");
3105
perror_plus("scandirat");
3037
3110
/* Removes the GPGME temp directory and all files inside */
3038
3111
if(tempdir != NULL){
3039
struct dirent **direntries = NULL;
3040
int tempdir_fd = (int)TEMP_FAILURE_RETRY(open(tempdir, O_RDONLY
3044
if(tempdir_fd == -1){
3045
perror_plus("open");
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);
3053
fprintf_plus(stderr, "unlinkat(open(\"%s\", O_RDONLY),"
3054
" \"%s\", 0): %s\n", tempdir,
3055
direntries[i]->d_name, strerror(errno));
3057
free(direntries[i]);
3060
/* need to clean even if 0 because man page doesn't specify */
3062
if(numentries == -1){
3063
perror_plus("scandir");
3065
ret = rmdir(tempdir);
3066
if(ret == -1 and errno != ENOENT){
3067
perror_plus("rmdir");
3112
clean_dir_at(-1, tempdir, 0);