9
9
* "browse_callback", and parts of "main".
11
11
* Everything else is
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
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
21
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/>.
28
* along with Mandos. If not, see <http://www.gnu.org/licenses/>.
29
30
* Contact the authors at <mandos@recompile.se>.
47
48
strtof(), abort() */
48
49
#include <stdbool.h> /* bool, false, true */
49
50
#include <string.h> /* strcmp(), strlen(), strerror(),
50
asprintf(), strcpy() */
51
asprintf(), strncpy(), strsignal()
51
53
#include <sys/ioctl.h> /* ioctl */
52
54
#include <sys/types.h> /* socket(), inet_pton(), sockaddr,
53
55
sockaddr_in6, PF_INET6,
57
59
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
58
60
inet_pton(), connect(),
60
#include <fcntl.h> /* open(), unlinkat() */
62
#include <fcntl.h> /* open(), unlinkat(), AT_REMOVEDIR */
61
63
#include <dirent.h> /* opendir(), struct dirent, readdir()
63
65
#include <inttypes.h> /* PRIu16, PRIdMAX, intmax_t,
65
#include <errno.h> /* perror(), errno,
67
#include <errno.h> /* perror(), errno, EINTR, EINVAL,
68
EAI_SYSTEM, ENETUNREACH,
69
EHOSTUNREACH, ECONNREFUSED, EPROTO,
70
EIO, ENOENT, ENXIO, ENOMEM, EISDIR,
66
72
program_invocation_short_name */
67
73
#include <time.h> /* nanosleep(), time(), sleep() */
68
74
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
350
356
/* Create new GPGME "context" */
351
357
rc = gpgme_new(&(mc->ctx));
352
358
if(rc != GPG_ERR_NO_ERROR){
353
fprintf_plus(stderr, "Mandos plugin mandos-client: "
354
"bad gpgme_new: %s: %s\n", gpgme_strsource(rc),
359
fprintf_plus(stderr, "bad gpgme_new: %s: %s\n",
360
gpgme_strsource(rc), gpgme_strerror(rc));
394
399
/* Create new empty GPGME data buffer for the plaintext */
395
400
rc = gpgme_data_new(&dh_plain);
396
401
if(rc != GPG_ERR_NO_ERROR){
397
fprintf_plus(stderr, "Mandos plugin mandos-client: "
398
"bad gpgme_data_new: %s: %s\n",
402
fprintf_plus(stderr, "bad gpgme_data_new: %s: %s\n",
399
403
gpgme_strsource(rc), gpgme_strerror(rc));
400
404
gpgme_data_release(dh_crypto);
414
418
if(result == NULL){
415
419
fprintf_plus(stderr, "gpgme_op_decrypt_result failed\n");
417
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);
421
if(result->unsupported_algorithm != NULL) {
422
fprintf_plus(stderr, "Unsupported algorithm: %s\n",
423
result->unsupported_algorithm);
425
fprintf_plus(stderr, "Wrong key usage: %s\n",
426
result->wrong_key_usage ? "Yes" : "No");
421
427
if(result->file_name != NULL){
422
428
fprintf_plus(stderr, "File name: %s\n", result->file_name);
513
519
fprintf_plus(stderr, "GnuTLS: %s", string);
516
__attribute__((nonnull, warn_unused_result))
522
__attribute__((nonnull(1, 2, 4), warn_unused_result))
517
523
static int init_gnutls_global(const char *pubkeyfilename,
518
524
const char *seckeyfilename,
519
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){
831
833
errno = old_errno;
835
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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();
841
843
errno = old_errno;
844
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if(setuid(0) == -1){
847
849
errno = old_errno;
851
853
/* Set effective user ID to unprivileged saved user ID */
852
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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;
856
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if(seteuid(uid) == -1){
859
861
errno = old_errno;
863
865
/* Lower privileges permanently */
864
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){
871
873
errno = old_errno;
875
877
/* Helper function to add_local_route() and delete_local_route() */
1628
1641
__attribute__((nonnull, warn_unused_result))
1629
1642
bool get_flags(const char *ifname, struct ifreq *ifr){
1633
1646
int s = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1636
1649
perror_plus("socket");
1640
strcpy(ifr->ifr_name, ifname);
1653
strncpy(ifr->ifr_name, ifname, IF_NAMESIZE);
1654
ifr->ifr_name[IF_NAMESIZE-1] = '\0'; /* NUL terminate */
1641
1655
ret = ioctl(s, SIOCGIFFLAGS, ifr);
1645
1659
perror_plus("ioctl SIOCGIFFLAGS");
1662
if((close(s) == -1) and debug){
1664
perror_plus("close");
1669
if((close(s) == -1) and debug){
1671
perror_plus("close");
1917
#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)");
1918
1945
int numhooks = scandirat(hookdir_fd, ".", &direntries,
1919
1946
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__ */
1928
1947
if(numhooks == -1){
1929
1948
perror_plus("scandir");
1932
1952
struct dirent *direntry;
1934
int devnull = (int)TEMP_FAILURE_RETRY(open("/dev/null", O_RDONLY));
1936
perror_plus("open(\"/dev/null\", O_RDONLY)");
1939
1954
for(int i = 0; i < numhooks; i++){
1940
1955
direntry = direntries[i];
2478
2495
.args_doc = "",
2479
2496
.doc = "Mandos client -- Get and decrypt"
2480
2497
" passwords from a Mandos server" };
2481
ret = argp_parse(&argp, argc, argv,
2482
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);
2489
2506
perror_plus("argp_parse");
2490
2507
exitcode = EX_OSERR;
3017
3039
/* Take down the network interfaces which were brought up */
3019
3041
char *interface = NULL;
3020
while((interface=argz_next(interfaces_to_take_down,
3021
interfaces_to_take_down_size,
3023
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);
3026
3048
perror_plus("Failed to take down interface");
3043
3065
free(interfaces_to_take_down);
3044
3066
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");
3046
3122
/* Removes the GPGME temp directory and all files inside */
3047
3123
if(tempdir != NULL){
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");
3124
clean_dir_at(-1, tempdir, 0);