9
9
* "browse_callback", and parts of "main".
11
11
* Everything else is
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
12
* Copyright © 2008-2015 Teddy Hogeborn
13
* Copyright © 2008-2015 Björn Påhlsson
15
* This program is free software: you can redistribute it and/or
16
* modify it under the terms of the GNU General Public License as
17
* published by the Free Software Foundation, either version 3 of the
18
* License, or (at your option) any later version.
20
* This program is distributed in the hope that it will be useful, but
23
21
* WITHOUT ANY WARRANTY; without even the implied warranty of
24
22
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
25
23
* General Public License for more details.
27
25
* You should have received a copy of the GNU General Public License
28
* along with Mandos. If not, see <http://www.gnu.org/licenses/>.
26
* along with this program. If not, see
27
* <http://www.gnu.org/licenses/>.
30
29
* Contact the authors at <mandos@recompile.se>.
48
47
strtof(), abort() */
49
48
#include <stdbool.h> /* bool, false, true */
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49
#include <string.h> /* strcmp(), strlen(), strerror(),
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asprintf(), strncpy(), strsignal()
50
asprintf(), strcpy() */
53
51
#include <sys/ioctl.h> /* ioctl */
54
52
#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(),
62
#include <fcntl.h> /* open(), unlinkat(), AT_REMOVEDIR */
60
#include <fcntl.h> /* open(), unlinkat() */
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#include <dirent.h> /* opendir(), struct dirent, readdir()
65
63
#include <inttypes.h> /* PRIu16, PRIdMAX, intmax_t,
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#include <errno.h> /* perror(), errno, EINTR, EINVAL,
68
EAI_SYSTEM, ENETUNREACH,
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EHOSTUNREACH, ECONNREFUSED, EPROTO,
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EIO, ENOENT, ENXIO, ENOMEM, EISDIR,
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#include <errno.h> /* perror(), errno,
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program_invocation_short_name */
73
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#include <time.h> /* nanosleep(), time(), sleep() */
74
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#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
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if(result == NULL){
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fprintf_plus(stderr, "gpgme_op_decrypt_result failed\n");
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if(result->unsupported_algorithm != NULL) {
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fprintf_plus(stderr, "Unsupported algorithm: %s\n",
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result->unsupported_algorithm);
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fprintf_plus(stderr, "Wrong key usage: %s\n",
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result->wrong_key_usage ? "Yes" : "No");
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fprintf_plus(stderr, "Unsupported algorithm: %s\n",
418
result->unsupported_algorithm);
419
fprintf_plus(stderr, "Wrong key usage: %u\n",
420
result->wrong_key_usage);
429
421
if(result->file_name != NULL){
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fprintf_plus(stderr, "File name: %s\n", result->file_name);
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513
fprintf_plus(stderr, "GnuTLS: %s", string);
524
__attribute__((nonnull(1, 2, 4), warn_unused_result))
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__attribute__((nonnull, warn_unused_result))
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static int init_gnutls_global(const char *pubkeyfilename,
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const char *seckeyfilename,
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519
const char *dhparamsfilename,
827
823
/* Set effective uid to 0, return errno */
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__attribute__((warn_unused_result))
829
int raise_privileges(void){
830
int old_errno = errno;
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error_t raise_privileges(void){
826
error_t old_errno = errno;
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error_t ret_errno = 0;
832
828
if(seteuid(0) == -1){
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errno = old_errno;
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/* Set effective and real user ID to 0. Return errno. */
840
836
__attribute__((warn_unused_result))
841
int raise_privileges_permanently(void){
842
int old_errno = errno;
843
int ret = raise_privileges();
837
error_t raise_privileges_permanently(void){
838
error_t old_errno = errno;
839
error_t ret_errno = raise_privileges();
845
841
errno = old_errno;
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if(setuid(0) == -1){
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errno = old_errno;
855
851
/* Set effective user ID to unprivileged saved user ID */
856
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__attribute__((warn_unused_result))
857
int lower_privileges(void){
858
int old_errno = errno;
853
error_t lower_privileges(void){
854
error_t old_errno = errno;
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error_t ret_errno = 0;
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if(seteuid(uid) == -1){
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859
errno = old_errno;
867
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/* Lower privileges permanently */
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__attribute__((warn_unused_result))
869
int lower_privileges_permanently(void){
870
int old_errno = errno;
865
error_t lower_privileges_permanently(void){
866
error_t old_errno = errno;
867
error_t ret_errno = 0;
872
868
if(setuid(uid) == -1){
875
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errno = old_errno;
879
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/* Helper function to add_local_route() and delete_local_route() */
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__attribute__((nonnull, warn_unused_result))
1644
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bool get_flags(const char *ifname, struct ifreq *ifr){
1648
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int s = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1651
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perror_plus("socket");
1655
strncpy(ifr->ifr_name, ifname, IF_NAMESIZE);
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ifr->ifr_name[IF_NAMESIZE-1] = '\0'; /* NUL terminate */
1640
strcpy(ifr->ifr_name, ifname);
1657
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ret = ioctl(s, SIOCGIFFLAGS, ifr);
1661
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perror_plus("ioctl SIOCGIFFLAGS");
1664
if((close(s) == -1) and debug){
1666
perror_plus("close");
1671
if((close(s) == -1) and debug){
1673
perror_plus("close");
1942
int devnull = (int)TEMP_FAILURE_RETRY(open("/dev/null", O_RDONLY));
1944
perror_plus("open(\"/dev/null\", O_RDONLY)");
1917
#if __GLIBC_PREREQ(2, 15)
1947
1918
int numhooks = scandirat(hookdir_fd, ".", &direntries,
1948
1919
runnable_hook, alphasort);
1920
#else /* not __GLIBC_PREREQ(2, 15) */
1921
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1923
#endif /* not __GLIBC_PREREQ(2, 15) */
1924
#else /* not __GLIBC__ */
1925
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1927
#endif /* not __GLIBC__ */
1949
1928
if(numhooks == -1){
1950
1929
perror_plus("scandir");
1954
1932
struct dirent *direntry;
1934
int devnull = (int)TEMP_FAILURE_RETRY(open("/dev/null", O_RDONLY));
1936
perror_plus("open(\"/dev/null\", O_RDONLY)");
1956
1939
for(int i = 0; i < numhooks; i++){
1957
1940
direntry = direntries[i];
2497
2478
.args_doc = "",
2498
2479
.doc = "Mandos client -- Get and decrypt"
2499
2480
" passwords from a Mandos server" };
2500
ret_errno = argp_parse(&argp, argc, argv,
2501
ARGP_IN_ORDER | ARGP_NO_HELP, 0, NULL);
2481
ret = argp_parse(&argp, argc, argv,
2482
ARGP_IN_ORDER | ARGP_NO_HELP, 0, NULL);
2508
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perror_plus("argp_parse");
2509
2490
exitcode = EX_OSERR;
3041
3017
/* Take down the network interfaces which were brought up */
3043
3019
char *interface = NULL;
3044
while((interface = argz_next(interfaces_to_take_down,
3045
interfaces_to_take_down_size,
3047
ret = take_down_interface(interface);
3020
while((interface=argz_next(interfaces_to_take_down,
3021
interfaces_to_take_down_size,
3023
ret_errno = take_down_interface(interface);
3050
3026
perror_plus("Failed to take down interface");
3067
3043
free(interfaces_to_take_down);
3068
3044
free(interfaces_hooks);
3070
void clean_dir_at(int base, const char * const dirname,
3072
struct dirent **direntries = NULL;
3074
int dir_fd = (int)TEMP_FAILURE_RETRY(openat(base, dirname,
3080
perror_plus("open");
3083
int numentries = scandirat(dir_fd, ".", &direntries,
3084
notdotentries, alphasort);
3085
if(numentries >= 0){
3086
for(int i = 0; i < numentries; i++){
3088
fprintf_plus(stderr, "Unlinking \"%s/%s\"\n",
3089
dirname, direntries[i]->d_name);
3091
dret = unlinkat(dir_fd, direntries[i]->d_name, 0);
3093
if(errno == EISDIR){
3094
dret = unlinkat(dir_fd, direntries[i]->d_name,
3097
if((dret == -1) and (errno == ENOTEMPTY)
3098
and (strcmp(direntries[i]->d_name, "private-keys-v1.d")
3099
== 0) and (level == 0)){
3100
/* Recurse only in this special case */
3101
clean_dir_at(dir_fd, direntries[i]->d_name, level+1);
3104
if((dret == -1) and (errno != ENOENT)){
3105
fprintf_plus(stderr, "unlink(\"%s/%s\"): %s\n", dirname,
3106
direntries[i]->d_name, strerror(errno));
3109
free(direntries[i]);
3112
/* need to clean even if 0 because man page doesn't specify */
3114
dret = unlinkat(base, dirname, AT_REMOVEDIR);
3115
if(dret == -1 and errno != ENOENT){
3116
perror_plus("rmdir");
3119
perror_plus("scandirat");
3124
3046
/* Removes the GPGME temp directory and all files inside */
3125
3047
if(tempdir != NULL){
3126
clean_dir_at(-1, tempdir, 0);
3048
struct dirent **direntries = NULL;
3049
int tempdir_fd = (int)TEMP_FAILURE_RETRY(open(tempdir, O_RDONLY
3053
if(tempdir_fd == -1){
3054
perror_plus("open");
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,
3063
#endif /* not __GLIBC_PREREQ(2, 15) */
3064
#else /* not __GLIBC__ */
3065
int numentries = scandir(tempdir, &direntries, notdotentries,
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);
3072
fprintf_plus(stderr, "unlinkat(open(\"%s\", O_RDONLY),"
3073
" \"%s\", 0): %s\n", tempdir,
3074
direntries[i]->d_name, strerror(errno));
3076
free(direntries[i]);
3079
/* need to clean even if 0 because man page doesn't specify */
3081
if(numentries == -1){
3082
perror_plus("scandir");
3084
ret = rmdir(tempdir);
3085
if(ret == -1 and errno != ENOENT){
3086
perror_plus("rmdir");