9
9
* "browse_callback", and parts of "main".
11
11
* Everything else is
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* Copyright © 2008-2015 Teddy Hogeborn
13
* Copyright © 2008-2015 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
17
* 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
15
* This file is part of Mandos.
17
* 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
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* <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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#include <sys/socket.h> /* socket(), struct sockaddr_in6,
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inet_pton(), connect(),
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#include <fcntl.h> /* open(), unlinkat() */
62
#include <fcntl.h> /* open(), unlinkat(), AT_REMOVEDIR */
61
63
#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,
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EHOSTUNREACH, ECONNREFUSED, EPROTO,
70
EIO, ENOENT, ENXIO, ENOMEM, EISDIR,
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program_invocation_short_name */
67
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#include <time.h> /* nanosleep(), time(), sleep() */
68
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#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
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519
fprintf_plus(stderr, "GnuTLS: %s", string);
516
__attribute__((nonnull, warn_unused_result))
522
__attribute__((nonnull(1, 2, 4), warn_unused_result))
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523
static int init_gnutls_global(const char *pubkeyfilename,
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524
const char *seckeyfilename,
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525
const char *dhparamsfilename,
823
825
/* Set effective uid to 0, return errno */
824
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__attribute__((warn_unused_result))
825
error_t raise_privileges(void){
826
error_t old_errno = errno;
827
error_t ret_errno = 0;
827
int raise_privileges(void){
828
int old_errno = errno;
828
830
if(seteuid(0) == -1){
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833
errno = old_errno;
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/* Set effective and real user ID to 0. Return errno. */
836
838
__attribute__((warn_unused_result))
837
error_t raise_privileges_permanently(void){
838
error_t old_errno = errno;
839
error_t ret_errno = raise_privileges();
839
int raise_privileges_permanently(void){
840
int old_errno = errno;
841
int ret = raise_privileges();
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errno = old_errno;
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if(setuid(0) == -1){
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849
errno = old_errno;
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853
/* 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;
855
int lower_privileges(void){
856
int old_errno = errno;
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if(seteuid(uid) == -1){
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errno = old_errno;
863
865
/* Lower privileges permanently */
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866
__attribute__((warn_unused_result))
865
error_t lower_privileges_permanently(void){
866
error_t old_errno = errno;
867
error_t ret_errno = 0;
867
int lower_privileges_permanently(void){
868
int old_errno = errno;
868
870
if(setuid(uid) == -1){
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errno = old_errno;
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/* Helper function to add_local_route() and delete_local_route() */
1627
1641
__attribute__((nonnull, warn_unused_result))
1628
1642
bool get_flags(const char *ifname, struct ifreq *ifr){
1632
1646
int s = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1635
1649
perror_plus("socket");
1639
strcpy(ifr->ifr_name, ifname);
1653
strncpy(ifr->ifr_name, ifname, IF_NAMESIZE);
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ifr->ifr_name[IF_NAMESIZE-1] = '\0'; /* NUL terminate */
1640
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ret = ioctl(s, SIOCGIFFLAGS, ifr);
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perror_plus("ioctl SIOCGIFFLAGS");
1662
if((close(s) == -1) and debug){
1664
perror_plus("close");
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if((close(s) == -1) and debug){
1671
perror_plus("close");
1916
#if __GLIBC_PREREQ(2, 15)
1940
int devnull = (int)TEMP_FAILURE_RETRY(open("/dev/null", O_RDONLY));
1942
perror_plus("open(\"/dev/null\", O_RDONLY)");
1917
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int numhooks = scandirat(hookdir_fd, ".", &direntries,
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runnable_hook, alphasort);
1919
#else /* not __GLIBC_PREREQ(2, 15) */
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int numhooks = scandir(hookdir, &direntries, runnable_hook,
1922
#endif /* not __GLIBC_PREREQ(2, 15) */
1923
#else /* not __GLIBC__ */
1924
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1926
#endif /* not __GLIBC__ */
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if(numhooks == -1){
1928
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perror_plus("scandir");
1931
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struct dirent *direntry;
1933
int devnull = (int)TEMP_FAILURE_RETRY(open("/dev/null", O_RDONLY));
1935
perror_plus("open(\"/dev/null\", O_RDONLY)");
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for(int i = 0; i < numhooks; i++){
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direntry = direntries[i];
2288
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int main(int argc, char *argv[]){
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mandos_context mc = { .server = NULL, .dh_bits = 0,
2290
.priority = "SECURE256:!CTYPE-X.509:"
2291
"+CTYPE-OPENPGP:!RSA", .current_server = NULL,
2292
.interfaces = NULL, .interfaces_size = 0 };
2308
.priority = "SECURE256:!CTYPE-X.509"
2309
":+CTYPE-OPENPGP:!RSA:+SIGN-DSA-SHA256",
2310
.current_server = NULL, .interfaces = NULL,
2311
.interfaces_size = 0 };
2293
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AvahiSServiceBrowser *sb = NULL;
2294
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error_t ret_errno;
2476
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.args_doc = "",
2477
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.doc = "Mandos client -- Get and decrypt"
2478
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" passwords from a Mandos server" };
2479
ret = argp_parse(&argp, argc, argv,
2480
ARGP_IN_ORDER | ARGP_NO_HELP, 0, NULL);
2498
ret_errno = argp_parse(&argp, argc, argv,
2499
ARGP_IN_ORDER | ARGP_NO_HELP, 0, NULL);
2487
2506
perror_plus("argp_parse");
2488
2507
exitcode = EX_OSERR;
3014
3039
/* Take down the network interfaces which were brought up */
3016
3041
char *interface = NULL;
3017
while((interface=argz_next(interfaces_to_take_down,
3018
interfaces_to_take_down_size,
3020
ret_errno = take_down_interface(interface);
3042
while((interface = argz_next(interfaces_to_take_down,
3043
interfaces_to_take_down_size,
3045
ret = take_down_interface(interface);
3023
3048
perror_plus("Failed to take down interface");
3040
3065
free(interfaces_to_take_down);
3041
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free(interfaces_hooks);
3068
void clean_dir_at(int base, const char * const dirname,
3070
struct dirent **direntries = NULL;
3072
int dir_fd = (int)TEMP_FAILURE_RETRY(openat(base, dirname,
3078
perror_plus("open");
3081
int numentries = scandirat(dir_fd, ".", &direntries,
3082
notdotentries, alphasort);
3083
if(numentries >= 0){
3084
for(int i = 0; i < numentries; i++){
3086
fprintf_plus(stderr, "Unlinking \"%s/%s\"\n",
3087
dirname, direntries[i]->d_name);
3089
dret = unlinkat(dir_fd, direntries[i]->d_name, 0);
3091
if(errno == EISDIR){
3092
dret = unlinkat(dir_fd, direntries[i]->d_name,
3095
if((dret == -1) and (errno == ENOTEMPTY)
3096
and (strcmp(direntries[i]->d_name, "private-keys-v1.d")
3097
== 0) and (level == 0)){
3098
/* Recurse only in this special case */
3099
clean_dir_at(dir_fd, direntries[i]->d_name, level+1);
3102
if((dret == -1) and (errno != ENOENT)){
3103
fprintf_plus(stderr, "unlink(\"%s/%s\"): %s\n", dirname,
3104
direntries[i]->d_name, strerror(errno));
3107
free(direntries[i]);
3110
/* need to clean even if 0 because man page doesn't specify */
3112
dret = unlinkat(base, dirname, AT_REMOVEDIR);
3113
if(dret == -1 and errno != ENOENT){
3114
perror_plus("rmdir");
3117
perror_plus("scandirat");
3043
3122
/* Removes the GPGME temp directory and all files inside */
3044
3123
if(tempdir != NULL){
3045
struct dirent **direntries = NULL;
3046
int tempdir_fd = (int)TEMP_FAILURE_RETRY(open(tempdir, O_RDONLY
3050
if(tempdir_fd == -1){
3051
perror_plus("open");
3054
#if __GLIBC_PREREQ(2, 15)
3055
int numentries = scandirat(tempdir_fd, ".", &direntries,
3056
notdotentries, alphasort);
3057
#else /* not __GLIBC_PREREQ(2, 15) */
3058
int numentries = scandir(tempdir, &direntries, notdotentries,
3060
#endif /* not __GLIBC_PREREQ(2, 15) */
3061
#else /* not __GLIBC__ */
3062
int numentries = scandir(tempdir, &direntries, notdotentries,
3064
#endif /* not __GLIBC__ */
3065
if(numentries >= 0){
3066
for(int i = 0; i < numentries; i++){
3067
ret = unlinkat(tempdir_fd, direntries[i]->d_name, 0);
3069
fprintf_plus(stderr, "unlinkat(open(\"%s\", O_RDONLY),"
3070
" \"%s\", 0): %s\n", tempdir,
3071
direntries[i]->d_name, strerror(errno));
3073
free(direntries[i]);
3076
/* need to clean even if 0 because man page doesn't specify */
3078
if(numentries == -1){
3079
perror_plus("scandir");
3081
ret = rmdir(tempdir);
3082
if(ret == -1 and errno != ENOENT){
3083
perror_plus("rmdir");
3086
TEMP_FAILURE_RETRY(close(tempdir_fd));
3124
clean_dir_at(-1, tempdir, 0);