9
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* "browse_callback", and parts of "main".
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11
* Everything else is
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* Copyright © 2008-2018 Teddy Hogeborn
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* 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
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* under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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* Mandos is distributed in the hope that it will be useful, but
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* Copyright © 2008-2016 Teddy Hogeborn
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* 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
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
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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.
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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/>.
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* along with this program. If not, see
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* <http://www.gnu.org/licenses/>.
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* Contact the authors at <mandos@recompile.se>.
275
/* Set effective uid to 0, return errno */
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__attribute__((warn_unused_result))
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int raise_privileges(void){
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int old_errno = errno;
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if(seteuid(0) == -1){
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/* Set effective and real user ID to 0. Return errno. */
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__attribute__((warn_unused_result))
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int raise_privileges_permanently(void){
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int old_errno = errno;
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int ret = raise_privileges();
303
/* Set effective user ID to unprivileged saved user ID */
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__attribute__((warn_unused_result))
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int lower_privileges(void){
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int old_errno = errno;
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if(seteuid(uid) == -1){
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/* Lower privileges permanently */
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__attribute__((warn_unused_result))
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int lower_privileges_permanently(void){
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int old_errno = errno;
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if(setuid(uid) == -1){
328
274
* Initialize GPGME.
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/* Workaround for systems without a real-time clock; see also
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Debian bug #894495: <https://bugs.debian.org/894495> */
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time_t currtime = time(NULL);
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if(currtime != (time_t)-1){
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if(gmtime_r(&currtime, &tm) == NULL) {
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perror_plus("gmtime_r");
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if(tm.tm_year != 70 or tm.tm_mon != 0){
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fprintf_plus(stderr, "System clock is January 1970");
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fprintf_plus(stderr, "System clock is invalid");
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ret = fstat(fd, &keystat);
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perror_plus("fstat");
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ret = raise_privileges();
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perror_plus("Failed to raise privileges");
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"Setting system clock to key file mtime");
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time_t keytime = keystat.st_mtim.tv_sec;
392
if(stime(&keytime) != 0){
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perror_plus("stime");
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ret = lower_privileges();
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perror_plus("Failed to lower privileges");
402
298
rc = gpgme_data_new_from_fd(&pgp_data, fd);
403
299
if(rc != GPG_ERR_NO_ERROR){
404
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fprintf_plus(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
412
308
gpgme_strsource(rc), gpgme_strerror(rc));
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gpgme_import_result_t import_result
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= gpgme_op_import_result(mc->ctx);
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if((import_result->imported < 1
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or import_result->not_imported > 0)
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and import_result->unchanged == 0){
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fprintf_plus(stderr, "bad gpgme_op_import_results:\n");
423
"The total number of considered keys: %d\n",
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import_result->considered);
426
"The number of keys without user ID: %d\n",
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import_result->no_user_id);
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"The total number of imported keys: %d\n",
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import_result->imported);
431
fprintf_plus(stderr, "The number of imported RSA keys: %d\n",
432
import_result->imported_rsa);
433
fprintf_plus(stderr, "The number of unchanged keys: %d\n",
434
import_result->unchanged);
435
fprintf_plus(stderr, "The number of new user IDs: %d\n",
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import_result->new_user_ids);
437
fprintf_plus(stderr, "The number of new sub keys: %d\n",
438
import_result->new_sub_keys);
439
fprintf_plus(stderr, "The number of new signatures: %d\n",
440
import_result->new_signatures);
441
fprintf_plus(stderr, "The number of new revocations: %d\n",
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import_result->new_revocations);
444
"The total number of secret keys read: %d\n",
445
import_result->secret_read);
447
"The number of imported secret keys: %d\n",
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import_result->secret_imported);
450
"The number of unchanged secret keys: %d\n",
451
import_result->secret_unchanged);
452
fprintf_plus(stderr, "The number of keys not imported: %d\n",
453
import_result->not_imported);
454
for(gpgme_import_status_t import_status
455
= import_result->imports;
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import_status != NULL;
457
import_status = import_status->next){
458
fprintf_plus(stderr, "Import status for key: %s\n",
460
if(import_status->result != GPG_ERR_NO_ERROR){
461
fprintf_plus(stderr, "Import result: %s: %s\n",
462
gpgme_strsource(import_status->result),
463
gpgme_strerror(import_status->result));
465
fprintf_plus(stderr, "Key status:\n");
467
import_status->status & GPGME_IMPORT_NEW
468
? "The key was new.\n"
469
: "The key was not new.\n");
471
import_status->status & GPGME_IMPORT_UID
472
? "The key contained new user IDs.\n"
473
: "The key did not contain new user IDs.\n");
475
import_status->status & GPGME_IMPORT_SIG
476
? "The key contained new signatures.\n"
477
: "The key did not contain new signatures.\n");
479
import_status->status & GPGME_IMPORT_SUBKEY
480
? "The key contained new sub keys.\n"
481
: "The key did not contain new sub keys.\n");
483
import_status->status & GPGME_IMPORT_SECRET
484
? "The key contained a secret key.\n"
485
: "The key did not contain a secret key.\n");
595
418
if(result == NULL){
596
419
fprintf_plus(stderr, "gpgme_op_decrypt_result failed\n");
598
if(result->unsupported_algorithm != NULL) {
599
fprintf_plus(stderr, "Unsupported algorithm: %s\n",
600
result->unsupported_algorithm);
602
fprintf_plus(stderr, "Wrong key usage: %s\n",
603
result->wrong_key_usage ? "Yes" : "No");
421
fprintf_plus(stderr, "Unsupported algorithm: %s\n",
422
result->unsupported_algorithm);
423
fprintf_plus(stderr, "Wrong key usage: %u\n",
424
result->wrong_key_usage);
604
425
if(result->file_name != NULL){
605
426
fprintf_plus(stderr, "File name: %s\n", result->file_name);
608
for(gpgme_recipient_t r = result->recipients; r != NULL;
428
gpgme_recipient_t recipient;
429
recipient = result->recipients;
430
while(recipient != NULL){
610
431
fprintf_plus(stderr, "Public key algorithm: %s\n",
611
gpgme_pubkey_algo_name(r->pubkey_algo));
612
fprintf_plus(stderr, "Key ID: %s\n", r->keyid);
432
gpgme_pubkey_algo_name
433
(recipient->pubkey_algo));
434
fprintf_plus(stderr, "Key ID: %s\n", recipient->keyid);
613
435
fprintf_plus(stderr, "Secret key available: %s\n",
614
r->status == GPG_ERR_NO_SECKEY ? "No" : "Yes");
436
recipient->status == GPG_ERR_NO_SECKEY
438
recipient = recipient->next;
996
815
static void empty_log(__attribute__((unused)) AvahiLogLevel level,
997
816
__attribute__((unused)) const char *txt){}
818
/* Set effective uid to 0, return errno */
819
__attribute__((warn_unused_result))
820
int raise_privileges(void){
821
int old_errno = errno;
823
if(seteuid(0) == -1){
830
/* Set effective and real user ID to 0. Return errno. */
831
__attribute__((warn_unused_result))
832
int raise_privileges_permanently(void){
833
int old_errno = errno;
834
int ret = raise_privileges();
846
/* Set effective user ID to unprivileged saved user ID */
847
__attribute__((warn_unused_result))
848
int lower_privileges(void){
849
int old_errno = errno;
851
if(seteuid(uid) == -1){
858
/* Lower privileges permanently */
859
__attribute__((warn_unused_result))
860
int lower_privileges_permanently(void){
861
int old_errno = errno;
863
if(setuid(uid) == -1){
999
870
/* Helper function to add_local_route() and delete_local_route() */
1000
871
__attribute__((nonnull, warn_unused_result))
1001
872
static bool add_delete_local_route(const bool add,
2062
int devnull = (int)TEMP_FAILURE_RETRY(open("/dev/null", O_RDONLY));
2064
perror_plus("open(\"/dev/null\", O_RDONLY)");
2067
1912
int numhooks = scandirat(hookdir_fd, ".", &direntries,
2068
1913
runnable_hook, alphasort);
2069
1914
if(numhooks == -1){
2070
1915
perror_plus("scandir");
2074
1918
struct dirent *direntry;
1920
int devnull = (int)TEMP_FAILURE_RETRY(open("/dev/null", O_RDONLY));
1922
perror_plus("open(\"/dev/null\", O_RDONLY)");
2076
1925
for(int i = 0; i < numhooks; i++){
2077
1926
direntry = direntries[i];