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
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* Contact the authors at <mandos@recompile.se>.
59
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#include <sys/socket.h> /* socket(), struct sockaddr_in6,
60
58
inet_pton(), connect(),
62
#include <fcntl.h> /* open(), unlinkat(), AT_REMOVEDIR */
60
#include <fcntl.h> /* open(), unlinkat() */
63
61
#include <dirent.h> /* opendir(), struct dirent, readdir()
65
63
#include <inttypes.h> /* PRIu16, PRIdMAX, intmax_t,
67
#include <errno.h> /* perror(), errno, EINTR, EINVAL,
68
EAI_SYSTEM, ENETUNREACH,
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EHOSTUNREACH, ECONNREFUSED, EPROTO,
70
EIO, ENOENT, ENXIO, ENOMEM, EISDIR,
65
#include <errno.h> /* perror(), errno,
72
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program_invocation_short_name */
73
67
#include <time.h> /* nanosleep(), time(), sleep() */
74
68
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
310
304
gpgme_strsource(rc), gpgme_strerror(rc));
314
gpgme_import_result_t import_result
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= gpgme_op_import_result(mc->ctx);
316
if((import_result->imported < 1
317
or import_result->not_imported > 0)
318
and import_result->unchanged == 0){
319
fprintf_plus(stderr, "bad gpgme_op_import_results:\n");
321
"The total number of considered keys: %d\n",
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import_result->considered);
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"The number of keys without user ID: %d\n",
325
import_result->no_user_id);
327
"The total number of imported keys: %d\n",
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import_result->imported);
329
fprintf_plus(stderr, "The number of imported RSA keys: %d\n",
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import_result->imported_rsa);
331
fprintf_plus(stderr, "The number of unchanged keys: %d\n",
332
import_result->unchanged);
333
fprintf_plus(stderr, "The number of new user IDs: %d\n",
334
import_result->new_user_ids);
335
fprintf_plus(stderr, "The number of new sub keys: %d\n",
336
import_result->new_sub_keys);
337
fprintf_plus(stderr, "The number of new signatures: %d\n",
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import_result->new_signatures);
339
fprintf_plus(stderr, "The number of new revocations: %d\n",
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import_result->new_revocations);
342
"The total number of secret keys read: %d\n",
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import_result->secret_read);
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"The number of imported secret keys: %d\n",
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import_result->secret_imported);
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"The number of unchanged secret keys: %d\n",
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import_result->secret_unchanged);
350
fprintf_plus(stderr, "The number of keys not imported: %d\n",
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import_result->not_imported);
352
for(gpgme_import_status_t import_status
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= import_result->imports;
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import_status != NULL;
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import_status = import_status->next){
356
fprintf_plus(stderr, "Import status for key: %s\n",
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if(import_status->result != GPG_ERR_NO_ERROR){
359
fprintf_plus(stderr, "Import result: %s: %s\n",
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gpgme_strsource(import_status->result),
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gpgme_strerror(import_status->result));
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fprintf_plus(stderr, "Key status:\n");
365
import_status->status & GPGME_IMPORT_NEW
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? "The key was new.\n"
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: "The key was not new.\n");
369
import_status->status & GPGME_IMPORT_UID
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? "The key contained new user IDs.\n"
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: "The key did not contain new user IDs.\n");
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import_status->status & GPGME_IMPORT_SIG
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? "The key contained new signatures.\n"
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: "The key did not contain new signatures.\n");
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import_status->status & GPGME_IMPORT_SUBKEY
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? "The key contained new sub keys.\n"
379
: "The key did not contain new sub keys.\n");
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import_status->status & GPGME_IMPORT_SECRET
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? "The key contained a secret key.\n"
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: "The key did not contain a secret key.\n");
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414
if(result == NULL){
494
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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");
417
fprintf_plus(stderr, "Unsupported algorithm: %s\n",
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result->unsupported_algorithm);
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fprintf_plus(stderr, "Wrong key usage: %u\n",
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result->wrong_key_usage);
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if(result->file_name != NULL){
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fprintf_plus(stderr, "File name: %s\n", result->file_name);
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for(gpgme_recipient_t r = result->recipients; r != NULL;
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gpgme_recipient_t recipient;
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recipient = result->recipients;
426
while(recipient != NULL){
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fprintf_plus(stderr, "Public key algorithm: %s\n",
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gpgme_pubkey_algo_name(r->pubkey_algo));
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fprintf_plus(stderr, "Key ID: %s\n", r->keyid);
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gpgme_pubkey_algo_name
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(recipient->pubkey_algo));
430
fprintf_plus(stderr, "Key ID: %s\n", recipient->keyid);
511
431
fprintf_plus(stderr, "Secret key available: %s\n",
512
r->status == GPG_ERR_NO_SECKEY ? "No" : "Yes");
432
recipient->status == GPG_ERR_NO_SECKEY
434
recipient = recipient->next;
897
823
/* Set effective uid to 0, return errno */
898
824
__attribute__((warn_unused_result))
899
int raise_privileges(void){
900
int old_errno = errno;
825
error_t raise_privileges(void){
826
error_t old_errno = errno;
827
error_t ret_errno = 0;
902
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if(seteuid(0) == -1){
905
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errno = old_errno;
909
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/* Set effective and real user ID to 0. Return errno. */
910
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__attribute__((warn_unused_result))
911
int raise_privileges_permanently(void){
912
int old_errno = errno;
913
int ret = raise_privileges();
837
error_t raise_privileges_permanently(void){
838
error_t old_errno = errno;
839
error_t ret_errno = raise_privileges();
915
841
errno = old_errno;
918
844
if(setuid(0) == -1){
921
847
errno = old_errno;
925
851
/* Set effective user ID to unprivileged saved user ID */
926
852
__attribute__((warn_unused_result))
927
int lower_privileges(void){
928
int old_errno = errno;
853
error_t lower_privileges(void){
854
error_t old_errno = errno;
855
error_t ret_errno = 0;
930
856
if(seteuid(uid) == -1){
933
859
errno = old_errno;
937
863
/* Lower privileges permanently */
938
864
__attribute__((warn_unused_result))
939
int lower_privileges_permanently(void){
940
int old_errno = errno;
865
error_t lower_privileges_permanently(void){
866
error_t old_errno = errno;
867
error_t ret_errno = 0;
942
868
if(setuid(uid) == -1){
945
871
errno = old_errno;
949
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/* Helper function to add_local_route() and delete_local_route() */
1713
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__attribute__((nonnull, warn_unused_result))
1714
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bool get_flags(const char *ifname, struct ifreq *ifr){
1718
1633
int s = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1721
1636
perror_plus("socket");
1725
strncpy(ifr->ifr_name, ifname, IF_NAMESIZE);
1726
ifr->ifr_name[IF_NAMESIZE-1] = '\0'; /* NUL terminate */
1640
strcpy(ifr->ifr_name, ifname);
1727
1641
ret = ioctl(s, SIOCGIFFLAGS, ifr);
1731
1645
perror_plus("ioctl SIOCGIFFLAGS");
1734
if((close(s) == -1) and debug){
1736
perror_plus("close");
1741
if((close(s) == -1) and debug){
1743
perror_plus("close");
2012
int devnull = (int)TEMP_FAILURE_RETRY(open("/dev/null", O_RDONLY));
2014
perror_plus("open(\"/dev/null\", O_RDONLY)");
1917
#if __GLIBC_PREREQ(2, 15)
2017
1918
int numhooks = scandirat(hookdir_fd, ".", &direntries,
2018
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__ */
2019
1928
if(numhooks == -1){
2020
1929
perror_plus("scandir");
2024
1932
struct dirent *direntry;
1934
int devnull = (int)TEMP_FAILURE_RETRY(open("/dev/null", O_RDONLY));
1936
perror_plus("open(\"/dev/null\", O_RDONLY)");
2026
1939
for(int i = 0; i < numhooks; i++){
2027
1940
direntry = direntries[i];
2567
2478
.args_doc = "",
2568
2479
.doc = "Mandos client -- Get and decrypt"
2569
2480
" passwords from a Mandos server" };
2570
ret_errno = argp_parse(&argp, argc, argv,
2571
ARGP_IN_ORDER | ARGP_NO_HELP, 0, NULL);
2481
ret = argp_parse(&argp, argc, argv,
2482
ARGP_IN_ORDER | ARGP_NO_HELP, 0, NULL);
2578
2489
perror_plus("argp_parse");
2579
2490
exitcode = EX_OSERR;
3137
3043
free(interfaces_to_take_down);
3138
3044
free(interfaces_hooks);
3140
void clean_dir_at(int base, const char * const dirname,
3142
struct dirent **direntries = NULL;
3144
int dir_fd = (int)TEMP_FAILURE_RETRY(openat(base, dirname,
3150
perror_plus("open");
3153
int numentries = scandirat(dir_fd, ".", &direntries,
3154
notdotentries, alphasort);
3155
if(numentries >= 0){
3156
for(int i = 0; i < numentries; i++){
3158
fprintf_plus(stderr, "Unlinking \"%s/%s\"\n",
3159
dirname, direntries[i]->d_name);
3161
dret = unlinkat(dir_fd, direntries[i]->d_name, 0);
3163
if(errno == EISDIR){
3164
dret = unlinkat(dir_fd, direntries[i]->d_name,
3167
if((dret == -1) and (errno == ENOTEMPTY)
3168
and (strcmp(direntries[i]->d_name, "private-keys-v1.d")
3169
== 0) and (level == 0)){
3170
/* Recurse only in this special case */
3171
clean_dir_at(dir_fd, direntries[i]->d_name, level+1);
3174
if((dret == -1) and (errno != ENOENT)){
3175
fprintf_plus(stderr, "unlink(\"%s/%s\"): %s\n", dirname,
3176
direntries[i]->d_name, strerror(errno));
3179
free(direntries[i]);
3182
/* need to clean even if 0 because man page doesn't specify */
3184
dret = unlinkat(base, dirname, AT_REMOVEDIR);
3185
if(dret == -1 and errno != ENOENT){
3186
perror_plus("rmdir");
3189
perror_plus("scandirat");
3194
3046
/* Removes the GPGME temp directory and all files inside */
3195
3047
if(tempdir != NULL){
3196
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");