9
9
* "browse_callback", and parts of "main".
11
11
* Everything else is
12
* Copyright © 2008-2022 Teddy Hogeborn
13
* Copyright © 2008-2022 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 © 2008-2011 Teddy Hogeborn
13
* Copyright © 2008-2011 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
* Contact the authors at <mandos@recompile.se>.
29
* Contact the authors at <mandos@fukt.bsnet.se>.
33
32
/* Needed by GPGME, specifically gpgme_data_seek() */
34
33
#ifndef _LARGEFILE_SOURCE
35
34
#define _LARGEFILE_SOURCE
36
#endif /* not _LARGEFILE_SOURCE */
37
36
#ifndef _FILE_OFFSET_BITS
38
37
#define _FILE_OFFSET_BITS 64
39
#endif /* not _FILE_OFFSET_BITS */
41
#define _GNU_SOURCE /* program_invocation_short_name,
42
TEMP_FAILURE_RETRY(), O_CLOEXEC,
43
scandirat(), asprintf() */
40
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), asprintf() */
42
#include <stdio.h> /* fprintf(), stderr, fwrite(),
43
stdout, ferror(), remove() */
44
#include <stdint.h> /* uint16_t, uint32_t */
45
#include <stddef.h> /* NULL, size_t, ssize_t */
46
#include <stdlib.h> /* free(), EXIT_SUCCESS, srand(),
44
48
#include <stdbool.h> /* bool, false, true */
45
#include <argp.h> /* argp_program_version,
46
argp_program_bug_address,
48
struct argp_state, argp_error(),
52
ARGP_HELP_EXIT_OK, ARGP_HELP_USAGE,
54
ARGP_ERR_UNKNOWN, struct argp,
55
argp_parse(), ARGP_IN_ORDER,
57
#include <stddef.h> /* NULL, size_t */
58
#include <sys/types.h> /* uid_t, gid_t, sig_atomic_t,
59
seteuid(), setuid(), pid_t,
60
setgid(), getuid(), getgid() */
61
#include <unistd.h> /* uid_t, gid_t, TEMP_FAILURE_RETRY(),
62
seteuid(), setuid(), close(),
63
ssize_t, read(), fork(), setgid(),
64
_exit(), dup2(), STDIN_FILENO,
65
STDERR_FILENO, STDOUT_FILENO,
66
fexecve(), write(), getuid(),
67
getgid(), fchown(), symlink(),
68
sleep(), unlinkat(), pause() */
69
#include <netinet/in.h> /* in_port_t, struct sockaddr_in6,
70
sa_family_t, struct sockaddr_in,
71
htons(), IN6_IS_ADDR_LINKLOCAL,
72
INET_ADDRSTRLEN, INET6_ADDRSTRLEN,
73
ntohl(), IPPROTO_IP */
74
#include <time.h> /* struct timespec, clock_gettime(),
75
CLOCK_MONOTONIC, time_t, struct tm,
76
gmtime_r(), clock_settime(),
77
CLOCK_REALTIME, nanosleep() */
78
#include <errno.h> /* errno,
79
program_invocation_short_name,
80
EINTR, EINVAL, ENETUNREACH,
81
EHOSTUNREACH, ECONNREFUSED, EPROTO,
82
EIO, ENOENT, ENXIO, error_t,
83
ENOMEM, EISDIR, ENOTEMPTY */
84
#include <stdio.h> /* fprintf(), stderr, perror(), FILE,
85
vfprintf(), off_t, SEEK_SET,
86
stdout, fwrite(), ferror(),
87
fflush(), asprintf() */
88
#include <stdarg.h> /* va_list, va_start(), vfprintf() */
89
#include <stdlib.h> /* realloc(), free(), malloc(),
90
getenv(), EXIT_FAILURE, setenv(),
91
EXIT_SUCCESS, strtof(), strtod(),
92
srand(), mkdtemp(), abort() */
93
#include <string.h> /* strdup(), strcmp(), strlen(),
94
strerror(), strncpy(), strspn(),
95
memcpy(), strrchr(), strchr(),
97
#include <fcntl.h> /* open(), O_RDONLY, O_DIRECTORY,
98
O_PATH, O_CLOEXEC, openat(),
99
O_NOFOLLOW, AT_REMOVEDIR */
100
#include <iso646.h> /* or, and, not */
101
#include <sys/stat.h> /* struct stat, fstat(), fstatat(),
102
S_ISREG(), S_IXUSR, S_IXGRP,
104
#include <net/if.h> /* IF_NAMESIZE, if_indextoname(),
105
if_nametoindex(), SIOCGIFFLAGS,
106
IFF_LOOPBACK, IFF_POINTOPOINT,
107
IFF_BROADCAST, IFF_NOARP, IFF_UP,
108
IFF_RUNNING, SIOCSIFFLAGS */
109
#include <sysexits.h> /* EX_NOPERM, EX_OSERR,
110
EX_UNAVAILABLE, EX_USAGE */
111
#include <grp.h> /* setgroups() */
112
#include <sys/wait.h> /* waitpid(), WIFEXITED(),
113
WEXITSTATUS(), WIFSIGNALED(),
115
#include <signal.h> /* kill(), SIGTERM, struct sigaction,
116
SIG_DFL, sigemptyset(),
117
sigaddset(), SIGINT, SIGHUP,
119
#include <sys/socket.h> /* struct sockaddr_storage, AF_INET6,
120
PF_INET6, AF_INET, PF_INET,
121
socket(), SOCK_STREAM,
122
SOCK_CLOEXEC, struct sockaddr,
123
connect(), SOCK_DGRAM */
124
#include <argz.h> /* argz_next(), argz_add_sep(),
125
argz_delete(), argz_stringify(),
126
argz_add(), argz_count() */
127
#include <inttypes.h> /* PRIuMAX, uintmax_t, uint32_t,
128
PRIdMAX, PRIu16, intmax_t,
49
#include <string.h> /* memset(), strcmp(), strlen(),
50
strerror(), asprintf(), strcpy() */
51
#include <sys/ioctl.h> /* ioctl */
52
#include <sys/types.h> /* socket(), inet_pton(), sockaddr,
53
sockaddr_in6, PF_INET6,
54
SOCK_STREAM, uid_t, gid_t, open(),
56
#include <sys/stat.h> /* open() */
57
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
58
inet_pton(), connect() */
59
#include <fcntl.h> /* open() */
60
#include <dirent.h> /* opendir(), struct dirent, readdir()
62
#include <inttypes.h> /* PRIu16, PRIdMAX, intmax_t,
130
#include <arpa/inet.h> /* inet_pton() */
131
#include <stdint.h> /* uint32_t, intptr_t, uint16_t */
132
#include <netdb.h> /* getnameinfo(), NI_NUMERICHOST,
133
EAI_SYSTEM, gai_strerror() */
134
#include <sys/ioctl.h> /* ioctl() */
135
#include <dirent.h> /* struct dirent, scandirat(),
136
alphasort(), scandir() */
137
#include <limits.h> /* INT_MAX */
64
#include <assert.h> /* assert() */
65
#include <errno.h> /* perror(), errno,
66
program_invocation_short_name */
67
#include <time.h> /* nanosleep(), time(), sleep() */
68
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
69
SIOCSIFFLAGS, if_indextoname(),
70
if_nametoindex(), IF_NAMESIZE */
71
#include <netinet/in.h> /* IN6_IS_ADDR_LINKLOCAL,
72
INET_ADDRSTRLEN, INET6_ADDRSTRLEN
74
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
75
getuid(), getgid(), seteuid(),
77
#include <arpa/inet.h> /* inet_pton(), htons, inet_ntop() */
78
#include <iso646.h> /* not, or, and */
79
#include <argp.h> /* struct argp_option, error_t, struct
80
argp_state, struct argp,
81
argp_parse(), ARGP_KEY_ARG,
82
ARGP_KEY_END, ARGP_ERR_UNKNOWN */
83
#include <signal.h> /* sigemptyset(), sigaddset(),
84
sigaction(), SIGTERM, sig_atomic_t,
86
#include <sysexits.h> /* EX_OSERR, EX_USAGE, EX_UNAVAILABLE,
87
EX_NOHOST, EX_IOERR, EX_PROTOCOL */
140
90
#include <sys/klog.h> /* klogctl() */
210
152
const char *priority;
212
154
server *current_server;
214
size_t interfaces_size;
215
155
} mandos_context;
217
/* global so signal handler can reach it*/
218
AvahiSimplePoll *simple_poll;
157
/* global context so signal handler can reach it*/
158
mandos_context mc = { .simple_poll = NULL, .server = NULL,
159
.dh_bits = 1024, .priority = "SECURE256"
160
":!CTYPE-X.509:+CTYPE-OPENPGP",
161
.current_server = NULL };
220
163
sig_atomic_t quit_now = 0;
221
164
int signal_received = 0;
223
166
/* Function to use when printing errors */
224
167
void perror_plus(const char *print_text){
226
168
fprintf(stderr, "Mandos plugin %s: ",
227
169
program_invocation_short_name);
229
170
perror(print_text);
232
__attribute__((format (gnu_printf, 2, 3), nonnull))
233
int fprintf_plus(FILE *stream, const char *format, ...){
235
va_start (ap, format);
237
TEMP_FAILURE_RETRY(fprintf(stream, "Mandos plugin %s: ",
238
program_invocation_short_name));
239
return (int)TEMP_FAILURE_RETRY(vfprintf(stream, format, ap));
243
174
* Make additional room in "buffer" for at least BUFFER_SIZE more
244
175
* bytes. "buffer_capacity" is how much is currently allocated,
245
176
* "buffer_length" is how much is already used.
247
__attribute__((nonnull, warn_unused_result))
248
178
size_t incbuffer(char **buffer, size_t buffer_length,
249
size_t buffer_capacity){
179
size_t buffer_capacity){
250
180
if(buffer_length + BUFFER_SIZE > buffer_capacity){
251
char *new_buf = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
253
int old_errno = errno;
181
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
260
185
buffer_capacity += BUFFER_SIZE;
262
187
return buffer_capacity;
265
190
/* Add server to set of servers to retry periodically */
266
__attribute__((nonnull, warn_unused_result))
267
bool add_server(const char *ip, in_port_t port, AvahiIfIndex if_index,
268
int af, server **current_server){
191
int add_server(const char *ip, uint16_t port,
192
AvahiIfIndex if_index,
270
195
server *new_server = malloc(sizeof(server));
271
196
if(new_server == NULL){
272
197
perror_plus("malloc");
275
200
*new_server = (server){ .ip = strdup(ip),
277
.if_index = if_index,
202
.if_index = if_index,
279
204
if(new_server->ip == NULL){
280
205
perror_plus("strdup");
284
ret = clock_gettime(CLOCK_MONOTONIC, &(new_server->last_seen));
286
perror_plus("clock_gettime");
288
#pragma GCC diagnostic push
289
#pragma GCC diagnostic ignored "-Wcast-qual"
291
free((char *)(new_server->ip));
293
#pragma GCC diagnostic pop
298
208
/* Special case of first server */
299
if(*current_server == NULL){
209
if (mc.current_server == NULL){
300
210
new_server->next = new_server;
301
211
new_server->prev = new_server;
302
*current_server = new_server;
212
mc.current_server = new_server;
213
/* Place the new server last in the list */
304
/* Place the new server last in the list */
305
new_server->next = *current_server;
306
new_server->prev = (*current_server)->prev;
215
new_server->next = mc.current_server;
216
new_server->prev = mc.current_server->prev;
307
217
new_server->prev->next = new_server;
308
(*current_server)->prev = new_server;
313
/* Set effective uid to 0, return errno */
314
__attribute__((warn_unused_result))
315
int raise_privileges(void){
316
int old_errno = errno;
318
if(seteuid(0) == -1){
325
/* Set effective and real user ID to 0. Return errno. */
326
__attribute__((warn_unused_result))
327
int raise_privileges_permanently(void){
328
int old_errno = errno;
329
int ret = raise_privileges();
341
/* Set effective user ID to unprivileged saved user ID */
342
__attribute__((warn_unused_result))
343
int lower_privileges(void){
344
int old_errno = errno;
346
if(seteuid(uid) == -1){
353
/* Lower privileges permanently */
354
__attribute__((warn_unused_result))
355
int lower_privileges_permanently(void){
356
int old_errno = errno;
358
if(setuid(uid) == -1){
218
mc.current_server->prev = new_server;
220
ret = clock_gettime(CLOCK_MONOTONIC, &mc.current_server->last_seen);
222
perror_plus("clock_gettime");
366
229
* Initialize GPGME.
368
__attribute__((nonnull, warn_unused_result))
369
static bool init_gpgme(const char * const seckey,
370
const char * const pubkey,
371
const char * const tempdir,
231
static bool init_gpgme(const char *seckey,
232
const char *pubkey, const char *tempdir){
373
233
gpgme_error_t rc;
374
234
gpgme_engine_info_t engine_info;
377
238
* Helper function to insert pub and seckey to the engine keyring.
379
bool import_key(const char * const filename){
240
bool import_key(const char *filename){
382
243
gpgme_data_t pgp_data;
390
/* Workaround for systems without a real-time clock; see also
391
Debian bug #894495: <https://bugs.debian.org/894495> */
394
time_t currtime = time(NULL);
395
if(currtime != (time_t)-1){
397
if(gmtime_r(&currtime, &tm) == NULL) {
398
perror_plus("gmtime_r");
401
if(tm.tm_year != 70 or tm.tm_mon != 0){
405
fprintf_plus(stderr, "System clock is January 1970");
409
fprintf_plus(stderr, "System clock is invalid");
414
ret = fstat(fd, &keystat);
416
perror_plus("fstat");
419
ret = raise_privileges();
422
perror_plus("Failed to raise privileges");
427
"Setting system clock to key file mtime");
429
if(clock_settime(CLOCK_REALTIME, &keystat.st_mtim) != 0){
430
perror_plus("clock_settime");
432
ret = lower_privileges();
435
perror_plus("Failed to lower privileges");
439
251
rc = gpgme_data_new_from_fd(&pgp_data, fd);
440
252
if(rc != GPG_ERR_NO_ERROR){
441
fprintf_plus(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
442
gpgme_strsource(rc), gpgme_strerror(rc));
253
fprintf(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
254
gpgme_strsource(rc), gpgme_strerror(rc));
446
rc = gpgme_op_import(mc->ctx, pgp_data);
258
rc = gpgme_op_import(mc.ctx, pgp_data);
447
259
if(rc != GPG_ERR_NO_ERROR){
448
fprintf_plus(stderr, "bad gpgme_op_import: %s: %s\n",
449
gpgme_strsource(rc), gpgme_strerror(rc));
260
fprintf(stderr, "bad gpgme_op_import: %s: %s\n",
261
gpgme_strsource(rc), gpgme_strerror(rc));
453
gpgme_import_result_t import_result
454
= gpgme_op_import_result(mc->ctx);
455
if((import_result->imported < 1
456
or import_result->not_imported > 0)
457
and import_result->unchanged == 0){
458
fprintf_plus(stderr, "bad gpgme_op_import_results:\n");
460
"The total number of considered keys: %d\n",
461
import_result->considered);
463
"The number of keys without user ID: %d\n",
464
import_result->no_user_id);
466
"The total number of imported keys: %d\n",
467
import_result->imported);
468
fprintf_plus(stderr, "The number of imported RSA keys: %d\n",
469
import_result->imported_rsa);
470
fprintf_plus(stderr, "The number of unchanged keys: %d\n",
471
import_result->unchanged);
472
fprintf_plus(stderr, "The number of new user IDs: %d\n",
473
import_result->new_user_ids);
474
fprintf_plus(stderr, "The number of new sub keys: %d\n",
475
import_result->new_sub_keys);
476
fprintf_plus(stderr, "The number of new signatures: %d\n",
477
import_result->new_signatures);
478
fprintf_plus(stderr, "The number of new revocations: %d\n",
479
import_result->new_revocations);
481
"The total number of secret keys read: %d\n",
482
import_result->secret_read);
484
"The number of imported secret keys: %d\n",
485
import_result->secret_imported);
487
"The number of unchanged secret keys: %d\n",
488
import_result->secret_unchanged);
489
fprintf_plus(stderr, "The number of keys not imported: %d\n",
490
import_result->not_imported);
491
for(gpgme_import_status_t import_status
492
= import_result->imports;
493
import_status != NULL;
494
import_status = import_status->next){
495
fprintf_plus(stderr, "Import status for key: %s\n",
497
if(import_status->result != GPG_ERR_NO_ERROR){
498
fprintf_plus(stderr, "Import result: %s: %s\n",
499
gpgme_strsource(import_status->result),
500
gpgme_strerror(import_status->result));
502
fprintf_plus(stderr, "Key status:\n");
504
import_status->status & GPGME_IMPORT_NEW
505
? "The key was new.\n"
506
: "The key was not new.\n");
508
import_status->status & GPGME_IMPORT_UID
509
? "The key contained new user IDs.\n"
510
: "The key did not contain new user IDs.\n");
512
import_status->status & GPGME_IMPORT_SIG
513
? "The key contained new signatures.\n"
514
: "The key did not contain new signatures.\n");
516
import_status->status & GPGME_IMPORT_SUBKEY
517
? "The key contained new sub keys.\n"
518
: "The key did not contain new sub keys.\n");
520
import_status->status & GPGME_IMPORT_SECRET
521
? "The key contained a secret key.\n"
522
: "The key did not contain a secret key.\n");
265
ret = (int)TEMP_FAILURE_RETRY(close(fd));
530
267
perror_plus("close");
598
332
ssize_t plaintext_length = 0;
601
fprintf_plus(stderr, "Trying to decrypt OpenPGP data\n");
335
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
604
338
/* Create new GPGME data buffer from memory cryptotext */
605
339
rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,
607
341
if(rc != GPG_ERR_NO_ERROR){
608
fprintf_plus(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
609
gpgme_strsource(rc), gpgme_strerror(rc));
342
fprintf(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
343
gpgme_strsource(rc), gpgme_strerror(rc));
613
347
/* Create new empty GPGME data buffer for the plaintext */
614
348
rc = gpgme_data_new(&dh_plain);
615
349
if(rc != GPG_ERR_NO_ERROR){
616
fprintf_plus(stderr, "bad gpgme_data_new: %s: %s\n",
617
gpgme_strsource(rc), gpgme_strerror(rc));
350
fprintf(stderr, "bad gpgme_data_new: %s: %s\n",
351
gpgme_strsource(rc), gpgme_strerror(rc));
618
352
gpgme_data_release(dh_crypto);
622
356
/* Decrypt data from the cryptotext data buffer to the plaintext
624
rc = gpgme_op_decrypt(mc->ctx, dh_crypto, dh_plain);
358
rc = gpgme_op_decrypt(mc.ctx, dh_crypto, dh_plain);
625
359
if(rc != GPG_ERR_NO_ERROR){
626
fprintf_plus(stderr, "bad gpgme_op_decrypt: %s: %s\n",
627
gpgme_strsource(rc), gpgme_strerror(rc));
360
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
361
gpgme_strsource(rc), gpgme_strerror(rc));
628
362
plaintext_length = -1;
630
364
gpgme_decrypt_result_t result;
631
result = gpgme_op_decrypt_result(mc->ctx);
365
result = gpgme_op_decrypt_result(mc.ctx);
632
366
if(result == NULL){
633
fprintf_plus(stderr, "gpgme_op_decrypt_result failed\n");
367
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
635
if(result->unsupported_algorithm != NULL) {
636
fprintf_plus(stderr, "Unsupported algorithm: %s\n",
637
result->unsupported_algorithm);
639
fprintf_plus(stderr, "Wrong key usage: %s\n",
640
result->wrong_key_usage ? "Yes" : "No");
369
fprintf(stderr, "Unsupported algorithm: %s\n",
370
result->unsupported_algorithm);
371
fprintf(stderr, "Wrong key usage: %u\n",
372
result->wrong_key_usage);
641
373
if(result->file_name != NULL){
642
fprintf_plus(stderr, "File name: %s\n", result->file_name);
374
fprintf(stderr, "File name: %s\n", result->file_name);
645
for(gpgme_recipient_t r = result->recipients; r != NULL;
647
fprintf_plus(stderr, "Public key algorithm: %s\n",
648
gpgme_pubkey_algo_name(r->pubkey_algo));
649
fprintf_plus(stderr, "Key ID: %s\n", r->keyid);
650
fprintf_plus(stderr, "Secret key available: %s\n",
651
r->status == GPG_ERR_NO_SECKEY ? "No" : "Yes");
376
gpgme_recipient_t recipient;
377
recipient = result->recipients;
378
while(recipient != NULL){
379
fprintf(stderr, "Public key algorithm: %s\n",
380
gpgme_pubkey_algo_name(recipient->pubkey_algo));
381
fprintf(stderr, "Key ID: %s\n", recipient->keyid);
382
fprintf(stderr, "Secret key available: %s\n",
383
recipient->status == GPG_ERR_NO_SECKEY
385
recipient = recipient->next;
752
484
/* OpenPGP credentials */
753
ret = gnutls_certificate_allocate_credentials(&mc->cred);
485
ret = gnutls_certificate_allocate_credentials(&mc.cred);
754
486
if(ret != GNUTLS_E_SUCCESS){
755
fprintf_plus(stderr, "GnuTLS memory error: %s\n",
756
safer_gnutls_strerror(ret));
487
fprintf(stderr, "GnuTLS memory error: %s\n",
488
safer_gnutls_strerror(ret));
489
gnutls_global_deinit();
761
fprintf_plus(stderr, "Attempting to use public key %s and"
762
" private key %s as GnuTLS credentials\n",
494
fprintf(stderr, "Attempting to use OpenPGP public key %s and"
495
" secret key %s as GnuTLS credentials\n", pubkeyfilename,
767
#if GNUTLS_VERSION_NUMBER >= 0x030606
768
ret = gnutls_certificate_set_rawpk_key_file
769
(mc->cred, pubkeyfilename, seckeyfilename,
770
GNUTLS_X509_FMT_PEM, /* format */
773
GNUTLS_KEY_DIGITAL_SIGNATURE | GNUTLS_KEY_KEY_ENCIPHERMENT,
775
0, /* names_length */
777
GNUTLS_PKCS_PLAIN | GNUTLS_PKCS_NULL_PASSWORD,
778
0); /* pkcs11_flags */
779
#elif GNUTLS_VERSION_NUMBER < 0x030600
780
499
ret = gnutls_certificate_set_openpgp_key_file
781
(mc->cred, pubkeyfilename, seckeyfilename,
500
(mc.cred, pubkeyfilename, seckeyfilename,
782
501
GNUTLS_OPENPGP_FMT_BASE64);
784
#error "Needs GnuTLS 3.6.6 or later, or before 3.6.0"
786
502
if(ret != GNUTLS_E_SUCCESS){
788
"Error[%d] while reading the key pair ('%s',"
789
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
790
fprintf_plus(stderr, "The GnuTLS error is: %s\n",
791
safer_gnutls_strerror(ret));
504
"Error[%d] while reading the OpenPGP key pair ('%s',"
505
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
506
fprintf(stderr, "The GnuTLS error is: %s\n",
507
safer_gnutls_strerror(ret));
795
511
/* GnuTLS server initialization */
796
ret = gnutls_dh_params_init(&mc->dh_params);
797
if(ret != GNUTLS_E_SUCCESS){
798
fprintf_plus(stderr, "Error in GnuTLS DH parameter"
799
" initialization: %s\n",
800
safer_gnutls_strerror(ret));
803
/* If a Diffie-Hellman parameters file was given, try to use it */
804
if(dhparamsfilename != NULL){
805
gnutls_datum_t params = { .data = NULL, .size = 0 };
807
int dhpfile = open(dhparamsfilename, O_RDONLY);
810
dhparamsfilename = NULL;
813
size_t params_capacity = 0;
815
params_capacity = incbuffer((char **)¶ms.data,
817
(size_t)params_capacity);
818
if(params_capacity == 0){
819
perror_plus("incbuffer");
822
dhparamsfilename = NULL;
825
ssize_t bytes_read = read(dhpfile,
826
params.data + params.size,
832
/* check bytes_read for failure */
837
dhparamsfilename = NULL;
840
params.size += (unsigned int)bytes_read;
842
ret = close(dhpfile);
844
perror_plus("close");
846
if(params.data == NULL){
847
dhparamsfilename = NULL;
849
if(dhparamsfilename == NULL){
852
ret = gnutls_dh_params_import_pkcs3(mc->dh_params, ¶ms,
853
GNUTLS_X509_FMT_PEM);
854
if(ret != GNUTLS_E_SUCCESS){
855
fprintf_plus(stderr, "Failed to parse DH parameters in file"
856
" \"%s\": %s\n", dhparamsfilename,
857
safer_gnutls_strerror(ret));
858
dhparamsfilename = NULL;
863
if(dhparamsfilename == NULL){
864
if(mc->dh_bits == 0){
865
#if GNUTLS_VERSION_NUMBER < 0x030600
866
/* Find out the optimal number of DH bits */
867
/* Try to read the private key file */
868
gnutls_datum_t buffer = { .data = NULL, .size = 0 };
870
int secfile = open(seckeyfilename, O_RDONLY);
875
size_t buffer_capacity = 0;
877
buffer_capacity = incbuffer((char **)&buffer.data,
879
(size_t)buffer_capacity);
880
if(buffer_capacity == 0){
881
perror_plus("incbuffer");
886
ssize_t bytes_read = read(secfile,
887
buffer.data + buffer.size,
893
/* check bytes_read for failure */
900
buffer.size += (unsigned int)bytes_read;
904
/* If successful, use buffer to parse private key */
905
gnutls_sec_param_t sec_param = GNUTLS_SEC_PARAM_ULTRA;
906
if(buffer.data != NULL){
908
gnutls_openpgp_privkey_t privkey = NULL;
909
ret = gnutls_openpgp_privkey_init(&privkey);
910
if(ret != GNUTLS_E_SUCCESS){
911
fprintf_plus(stderr, "Error initializing OpenPGP key"
913
safer_gnutls_strerror(ret));
917
ret = gnutls_openpgp_privkey_import
918
(privkey, &buffer, GNUTLS_OPENPGP_FMT_BASE64, "", 0);
919
if(ret != GNUTLS_E_SUCCESS){
920
fprintf_plus(stderr, "Error importing OpenPGP key : %s",
921
safer_gnutls_strerror(ret));
927
/* Use private key to suggest an appropriate
929
sec_param = gnutls_openpgp_privkey_sec_param(privkey);
930
gnutls_openpgp_privkey_deinit(privkey);
932
fprintf_plus(stderr, "This OpenPGP key implies using"
933
" a GnuTLS security parameter \"%s\".\n",
934
safe_string(gnutls_sec_param_get_name
940
if(sec_param == GNUTLS_SEC_PARAM_UNKNOWN){
941
/* Err on the side of caution */
942
sec_param = GNUTLS_SEC_PARAM_ULTRA;
944
fprintf_plus(stderr, "Falling back to security parameter"
946
safe_string(gnutls_sec_param_get_name
951
unsigned int uret = gnutls_sec_param_to_pk_bits(GNUTLS_PK_DH, sec_param);
955
fprintf_plus(stderr, "A \"%s\" GnuTLS security parameter"
956
" implies %u DH bits; using that.\n",
957
safe_string(gnutls_sec_param_get_name
962
fprintf_plus(stderr, "Failed to get implied number of DH"
963
" bits for security parameter \"%s\"): %s\n",
964
safe_string(gnutls_sec_param_get_name
966
safer_gnutls_strerror(ret));
970
} else { /* dh_bits != 0 */
972
fprintf_plus(stderr, "DH bits explicitly set to %u\n",
975
ret = gnutls_dh_params_generate2(mc->dh_params, mc->dh_bits);
976
if(ret != GNUTLS_E_SUCCESS){
977
fprintf_plus(stderr, "Error in GnuTLS prime generation (%u"
978
" bits): %s\n", mc->dh_bits,
979
safer_gnutls_strerror(ret));
982
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
512
ret = gnutls_dh_params_init(&mc.dh_params);
513
if(ret != GNUTLS_E_SUCCESS){
514
fprintf(stderr, "Error in GnuTLS DH parameter initialization:"
515
" %s\n", safer_gnutls_strerror(ret));
518
ret = gnutls_dh_params_generate2(mc.dh_params, mc.dh_bits);
519
if(ret != GNUTLS_E_SUCCESS){
520
fprintf(stderr, "Error in GnuTLS prime generation: %s\n",
521
safer_gnutls_strerror(ret));
525
gnutls_certificate_set_dh_params(mc.cred, mc.dh_params);
990
gnutls_certificate_free_credentials(mc->cred);
991
gnutls_dh_params_deinit(mc->dh_params);
531
gnutls_certificate_free_credentials(mc.cred);
532
gnutls_global_deinit();
533
gnutls_dh_params_deinit(mc.dh_params);
995
__attribute__((nonnull, warn_unused_result))
996
static int init_gnutls_session(gnutls_session_t *session,
537
static int init_gnutls_session(gnutls_session_t *session){
999
539
/* GnuTLS session creation */
1001
ret = gnutls_init(session, (GNUTLS_SERVER
1002
#if GNUTLS_VERSION_NUMBER >= 0x030506
1005
#if GNUTLS_VERSION_NUMBER >= 0x030606
1006
| GNUTLS_ENABLE_RAWPK
541
ret = gnutls_init(session, GNUTLS_SERVER);
1012
545
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
1013
546
if(ret != GNUTLS_E_SUCCESS){
1014
fprintf_plus(stderr,
1015
"Error in GnuTLS session initialization: %s\n",
1016
safer_gnutls_strerror(ret));
547
fprintf(stderr, "Error in GnuTLS session initialization: %s\n",
548
safer_gnutls_strerror(ret));
1020
552
const char *err;
1022
ret = gnutls_priority_set_direct(*session, mc->priority, &err);
554
ret = gnutls_priority_set_direct(*session, mc.priority, &err);
1024
556
gnutls_deinit(*session);
1027
559
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
1028
560
if(ret != GNUTLS_E_SUCCESS){
1029
fprintf_plus(stderr, "Syntax error at: %s\n", err);
1030
fprintf_plus(stderr, "GnuTLS error: %s\n",
1031
safer_gnutls_strerror(ret));
561
fprintf(stderr, "Syntax error at: %s\n", err);
562
fprintf(stderr, "GnuTLS error: %s\n",
563
safer_gnutls_strerror(ret));
1032
564
gnutls_deinit(*session);
1059
593
static void empty_log(__attribute__((unused)) AvahiLogLevel level,
1060
594
__attribute__((unused)) const char *txt){}
1062
/* Helper function to add_local_route() and delete_local_route() */
1063
__attribute__((nonnull, warn_unused_result))
1064
static bool add_delete_local_route(const bool add,
1065
const char *address,
1066
AvahiIfIndex if_index){
1068
char helper[] = "mandos-client-iprouteadddel";
1069
char add_arg[] = "add";
1070
char delete_arg[] = "delete";
1071
char debug_flag[] = "--debug";
1072
char *pluginhelperdir = getenv("MANDOSPLUGINHELPERDIR");
1073
if(pluginhelperdir == NULL){
1075
fprintf_plus(stderr, "MANDOSPLUGINHELPERDIR environment"
1076
" variable not set; cannot run helper\n");
1081
char interface[IF_NAMESIZE];
1082
if(if_indextoname((unsigned int)if_index, interface) == NULL){
1083
perror_plus("if_indextoname");
1087
int devnull = (int)TEMP_FAILURE_RETRY(open("/dev/null", O_RDONLY));
1089
perror_plus("open(\"/dev/null\", O_RDONLY)");
1095
/* Raise privileges */
1096
errno = raise_privileges_permanently();
1098
perror_plus("Failed to raise privileges");
1099
/* _exit(EX_NOPERM); */
1105
perror_plus("setgid");
1109
/* Reset supplementary groups */
1111
ret = setgroups(0, NULL);
1113
perror_plus("setgroups");
1118
ret = dup2(devnull, STDIN_FILENO);
1120
perror_plus("dup2(devnull, STDIN_FILENO)");
1124
ret = close(devnull);
1126
perror_plus("close");
1128
ret = dup2(STDERR_FILENO, STDOUT_FILENO);
1130
perror_plus("dup2(STDERR_FILENO, STDOUT_FILENO)");
1133
int helperdir_fd = (int)TEMP_FAILURE_RETRY(open(pluginhelperdir,
1138
if(helperdir_fd == -1){
1139
perror_plus("open");
1140
_exit(EX_UNAVAILABLE);
1142
int helper_fd = (int)TEMP_FAILURE_RETRY(openat(helperdir_fd,
1144
if(helper_fd == -1){
1145
perror_plus("openat");
1146
close(helperdir_fd);
1147
_exit(EX_UNAVAILABLE);
1149
close(helperdir_fd);
1151
#pragma GCC diagnostic push
1152
#pragma GCC diagnostic ignored "-Wcast-qual"
1154
if(fexecve(helper_fd, (char *const [])
1155
{ helper, add ? add_arg : delete_arg, (char *)address,
1156
interface, debug ? debug_flag : NULL, NULL },
1159
#pragma GCC diagnostic pop
1161
perror_plus("fexecve");
1162
_exit(EXIT_FAILURE);
1166
perror_plus("fork");
1170
ret = close(devnull);
1172
perror_plus("close");
1178
pret = waitpid(pid, &status, 0);
1179
if(pret == -1 and errno == EINTR and quit_now){
1180
int errno_raising = 0;
1181
if((errno = raise_privileges()) != 0){
1182
errno_raising = errno;
1183
perror_plus("Failed to raise privileges in order to"
1184
" kill helper program");
1186
if(kill(pid, SIGTERM) == -1){
1187
perror_plus("kill");
1189
if((errno_raising == 0) and (errno = lower_privileges()) != 0){
1190
perror_plus("Failed to lower privileges after killing"
1195
} while(pret == -1 and errno == EINTR);
1197
perror_plus("waitpid");
1200
if(WIFEXITED(status)){
1201
if(WEXITSTATUS(status) != 0){
1202
fprintf_plus(stderr, "Error: iprouteadddel exited"
1203
" with status %d\n", WEXITSTATUS(status));
1208
if(WIFSIGNALED(status)){
1209
fprintf_plus(stderr, "Error: iprouteadddel died by"
1210
" signal %d\n", WTERMSIG(status));
1213
fprintf_plus(stderr, "Error: iprouteadddel crashed\n");
1217
__attribute__((nonnull, warn_unused_result))
1218
static bool add_local_route(const char *address,
1219
AvahiIfIndex if_index){
1221
fprintf_plus(stderr, "Adding route to %s\n", address);
1223
return add_delete_local_route(true, address, if_index);
1226
__attribute__((nonnull, warn_unused_result))
1227
static bool delete_local_route(const char *address,
1228
AvahiIfIndex if_index){
1230
fprintf_plus(stderr, "Removing route to %s\n", address);
1232
return add_delete_local_route(false, address, if_index);
1235
596
/* Called when a Mandos server is found */
1236
__attribute__((nonnull, warn_unused_result))
1237
static int start_mandos_communication(const char *ip, in_port_t port,
597
static int start_mandos_communication(const char *ip, uint16_t port,
1238
598
AvahiIfIndex if_index,
1239
int af, mandos_context *mc){
1240
600
int ret, tcp_sd = -1;
1242
struct sockaddr_storage to;
603
struct sockaddr_in in;
604
struct sockaddr_in6 in6;
1243
606
char *buffer = NULL;
1244
607
char *decrypted_buffer = NULL;
1245
608
size_t buffer_length = 0;
1375
709
if(if_indextoname((unsigned int)if_index, interface) == NULL){
1376
710
perror_plus("if_indextoname");
1378
fprintf_plus(stderr, "Connection to: %s%%%s, port %" PRIuMAX
1379
"\n", ip, interface, (uintmax_t)port);
712
fprintf(stderr, "Connection to: %s%%%s, port %" PRIu16 "\n",
713
ip, interface, port);
1382
fprintf_plus(stderr, "Connection to: %s, port %" PRIuMAX "\n",
1383
ip, (uintmax_t)port);
716
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
1385
719
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
1386
720
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
1388
ret = getnameinfo((struct sockaddr *)&to,
1389
sizeof(struct sockaddr_in6),
1390
addrstr, sizeof(addrstr), NULL, 0,
1393
ret = getnameinfo((struct sockaddr *)&to,
1394
sizeof(struct sockaddr_in),
1395
addrstr, sizeof(addrstr), NULL, 0,
1398
if(ret == EAI_SYSTEM){
1399
perror_plus("getnameinfo");
1400
} else if(ret != 0) {
1401
fprintf_plus(stderr, "getnameinfo: %s", gai_strerror(ret));
1402
} else if(strcmp(addrstr, ip) != 0){
1403
fprintf_plus(stderr, "Canonical address form: %s\n", addrstr);
1414
ret = connect(tcp_sd, (struct sockaddr *)&to,
1415
sizeof(struct sockaddr_in6));
1417
ret = connect(tcp_sd, (struct sockaddr *)&to, /* IPv4 */
1418
sizeof(struct sockaddr_in));
1421
if(((errno == ENETUNREACH) or (errno == EHOSTUNREACH))
1422
and if_index != AVAHI_IF_UNSPEC
1423
and connect_to == NULL
1424
and not route_added and
1425
((af == AF_INET6 and not
1426
IN6_IS_ADDR_LINKLOCAL(&(((struct sockaddr_in6 *)
1428
or (af == AF_INET and
1429
/* Not a a IPv4LL address */
1430
(ntohl(((struct sockaddr_in *)&to)->sin_addr.s_addr)
1431
& 0xFFFF0000L) != 0xA9FE0000L))){
1432
/* Work around Avahi bug - Avahi does not announce link-local
1433
addresses if it has a global address, so local hosts with
1434
*only* a link-local address (e.g. Mandos clients) cannot
1435
connect to a Mandos server announced by Avahi on a server
1436
host with a global address. Work around this by retrying
1437
with an explicit route added with the server's address.
1439
Avahi bug reference:
1440
https://lists.freedesktop.org/archives/avahi/2010-February/001833.html
1441
https://bugs.debian.org/587961
1444
fprintf_plus(stderr, "Mandos server unreachable, trying"
1448
route_added = add_local_route(ip, if_index);
1454
if(errno != ECONNREFUSED or debug){
1456
perror_plus("connect");
723
pcret = inet_ntop(af, &(to.in6.sin6_addr), addrstr,
726
pcret = inet_ntop(af, &(to.in.sin_addr), addrstr,
730
perror_plus("inet_ntop");
732
if(strcmp(addrstr, ip) != 0){
733
fprintf(stderr, "Canonical address form: %s\n", addrstr);
744
ret = connect(tcp_sd, &to.in6, sizeof(to));
746
ret = connect(tcp_sd, &to.in, sizeof(to)); /* IPv4 */
749
if ((errno != ECONNREFUSED and errno != ENETUNREACH) or debug){
751
perror_plus("connect");
1469
762
const char *out = mandos_protocol_version;
1824
1079
signal_received = sig;
1825
1080
int old_errno = errno;
1826
1081
/* set main loop to exit */
1827
if(simple_poll != NULL){
1828
avahi_simple_poll_quit(simple_poll);
1082
if(mc.simple_poll != NULL){
1083
avahi_simple_poll_quit(mc.simple_poll);
1830
1085
errno = old_errno;
1833
__attribute__((nonnull, warn_unused_result))
1834
bool get_flags(const char *ifname, struct ifreq *ifr){
1838
int s = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1841
perror_plus("socket");
1845
strncpy(ifr->ifr_name, ifname, IF_NAMESIZE);
1846
ifr->ifr_name[IF_NAMESIZE-1] = '\0'; /* NUL terminate */
1847
ret = ioctl(s, SIOCGIFFLAGS, ifr);
1089
* This function determines if a directory entry in /sys/class/net
1090
* corresponds to an acceptable network device.
1091
* (This function is passed to scandir(3) as a filter function.)
1093
int good_interface(const struct dirent *if_entry){
1095
char *flagname = NULL;
1096
if(if_entry->d_name[0] == '.'){
1099
int ret = asprintf(&flagname, "%s/%s/flags", sys_class_net,
1102
perror_plus("asprintf");
1105
int flags_fd = (int)TEMP_FAILURE_RETRY(open(flagname, O_RDONLY));
1107
perror_plus("open");
1112
typedef short ifreq_flags; /* ifreq.ifr_flags in netdevice(7) */
1113
/* read line from flags_fd */
1114
ssize_t to_read = 2+(sizeof(ifreq_flags)*2)+1; /* "0x1003\n" */
1115
char *flagstring = malloc((size_t)to_read+1); /* +1 for final \0 */
1116
flagstring[(size_t)to_read] = '\0';
1117
if(flagstring == NULL){
1118
perror_plus("malloc");
1123
ssret = (ssize_t)TEMP_FAILURE_RETRY(read(flags_fd, flagstring,
1126
perror_plus("read");
1140
tmpmax = strtoimax(flagstring, &tmp, 0);
1141
if(errno != 0 or tmp == flagstring or (*tmp != '\0'
1142
and not (isspace(*tmp)))
1143
or tmpmax != (ifreq_flags)tmpmax){
1851
perror_plus("ioctl SIOCGIFFLAGS");
1854
if((close(s) == -1) and debug){
1856
perror_plus("close");
1861
if((close(s) == -1) and debug){
1863
perror_plus("close");
1869
__attribute__((nonnull, warn_unused_result))
1870
bool good_flags(const char *ifname, const struct ifreq *ifr){
1145
fprintf(stderr, "Invalid flags \"%s\" for interface \"%s\"\n",
1146
flagstring, if_entry->d_name);
1152
ifreq_flags flags = (ifreq_flags)tmpmax;
1872
1153
/* Reject the loopback device */
1873
if(ifr->ifr_flags & IFF_LOOPBACK){
1154
if(flags & IFF_LOOPBACK){
1875
fprintf_plus(stderr, "Rejecting loopback interface \"%s\"\n",
1156
fprintf(stderr, "Rejecting loopback interface \"%s\"\n",
1880
1161
/* Accept point-to-point devices only if connect_to is specified */
1881
if(connect_to != NULL and (ifr->ifr_flags & IFF_POINTOPOINT)){
1162
if(connect_to != NULL and (flags & IFF_POINTOPOINT)){
1883
fprintf_plus(stderr, "Accepting point-to-point interface"
1884
" \"%s\"\n", ifname);
1164
fprintf(stderr, "Accepting point-to-point interface \"%s\"\n",
1888
1169
/* Otherwise, reject non-broadcast-capable devices */
1889
if(not (ifr->ifr_flags & IFF_BROADCAST)){
1170
if(not (flags & IFF_BROADCAST)){
1891
fprintf_plus(stderr, "Rejecting non-broadcast interface"
1892
" \"%s\"\n", ifname);
1172
fprintf(stderr, "Rejecting non-broadcast interface \"%s\"\n",
1896
1177
/* Reject non-ARP interfaces (including dummy interfaces) */
1897
if(ifr->ifr_flags & IFF_NOARP){
1178
if(flags & IFF_NOARP){
1899
fprintf_plus(stderr, "Rejecting non-ARP interface \"%s\"\n",
1180
fprintf(stderr, "Rejecting non-ARP interface \"%s\"\n",
1905
1185
/* Accept this device */
1907
fprintf_plus(stderr, "Interface \"%s\" is good\n", ifname);
1913
* This function determines if a directory entry in /sys/class/net
1914
* corresponds to an acceptable network device.
1915
* (This function is passed to scandir(3) as a filter function.)
1917
__attribute__((nonnull, warn_unused_result))
1918
int good_interface(const struct dirent *if_entry){
1919
if(if_entry->d_name[0] == '.'){
1924
if(not get_flags(if_entry->d_name, &ifr)){
1926
fprintf_plus(stderr, "Failed to get flags for interface "
1927
"\"%s\"\n", if_entry->d_name);
1932
if(not good_flags(if_entry->d_name, &ifr)){
1187
fprintf(stderr, "Interface \"%s\" is acceptable\n",
1939
* This function determines if a network interface is up.
1941
__attribute__((nonnull, warn_unused_result))
1942
bool interface_is_up(const char *interface){
1944
if(not get_flags(interface, &ifr)){
1946
fprintf_plus(stderr, "Failed to get flags for interface "
1947
"\"%s\"\n", interface);
1952
return (bool)(ifr.ifr_flags & IFF_UP);
1956
* This function determines if a network interface is running
1958
__attribute__((nonnull, warn_unused_result))
1959
bool interface_is_running(const char *interface){
1961
if(not get_flags(interface, &ifr)){
1963
fprintf_plus(stderr, "Failed to get flags for interface "
1964
"\"%s\"\n", interface);
1969
return (bool)(ifr.ifr_flags & IFF_RUNNING);
1972
__attribute__((nonnull, pure, warn_unused_result))
1973
1193
int notdotentries(const struct dirent *direntry){
1974
1194
/* Skip "." and ".." */
1975
1195
if(direntry->d_name[0] == '.'
2103
1265
ret = avahi_simple_poll_iterate(s, (int)block_time);
2106
if(ret > 0 or errno != EINTR){
1268
if (ret > 0 or errno != EINTR) {
2107
1269
return (ret != 1) ? ret : 0;
2113
__attribute__((nonnull))
2114
void run_network_hooks(const char *mode, const char *interface,
2116
struct dirent **direntries = NULL;
2117
if(hookdir_fd == -1){
2118
hookdir_fd = open(hookdir, O_RDONLY | O_DIRECTORY | O_PATH
2120
if(hookdir_fd == -1){
2121
if(errno == ENOENT){
2123
fprintf_plus(stderr, "Network hook directory \"%s\" not"
2124
" found\n", hookdir);
2127
perror_plus("open");
2132
int devnull = (int)TEMP_FAILURE_RETRY(open("/dev/null", O_RDONLY));
2134
perror_plus("open(\"/dev/null\", O_RDONLY)");
2137
int numhooks = scandirat(hookdir_fd, ".", &direntries,
2138
runnable_hook, alphasort);
2140
perror_plus("scandir");
2144
struct dirent *direntry;
2146
for(int i = 0; i < numhooks; i++){
2147
direntry = direntries[i];
2149
fprintf_plus(stderr, "Running network hook \"%s\"\n",
2152
pid_t hook_pid = fork();
2155
/* Raise privileges */
2156
errno = raise_privileges_permanently();
2158
perror_plus("Failed to raise privileges");
2165
perror_plus("setgid");
2168
/* Reset supplementary groups */
2170
ret = setgroups(0, NULL);
2172
perror_plus("setgroups");
2175
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
2177
perror_plus("setenv");
2180
ret = setenv("DEVICE", interface, 1);
2182
perror_plus("setenv");
2185
ret = setenv("VERBOSITY", debug ? "1" : "0", 1);
2187
perror_plus("setenv");
2190
ret = setenv("MODE", mode, 1);
2192
perror_plus("setenv");
2196
ret = asprintf(&delaystring, "%f", (double)delay);
2198
perror_plus("asprintf");
2201
ret = setenv("DELAY", delaystring, 1);
2204
perror_plus("setenv");
2208
if(connect_to != NULL){
2209
ret = setenv("CONNECT", connect_to, 1);
2211
perror_plus("setenv");
2215
int hook_fd = (int)TEMP_FAILURE_RETRY(openat(hookdir_fd,
2219
perror_plus("openat");
2220
_exit(EXIT_FAILURE);
2222
if(close(hookdir_fd) == -1){
2223
perror_plus("close");
2224
_exit(EXIT_FAILURE);
2226
ret = dup2(devnull, STDIN_FILENO);
2228
perror_plus("dup2(devnull, STDIN_FILENO)");
2231
ret = close(devnull);
2233
perror_plus("close");
2236
ret = dup2(STDERR_FILENO, STDOUT_FILENO);
2238
perror_plus("dup2(STDERR_FILENO, STDOUT_FILENO)");
2241
if(fexecve(hook_fd, (char *const []){ direntry->d_name, NULL },
2243
perror_plus("fexecve");
2244
_exit(EXIT_FAILURE);
2248
perror_plus("fork");
2253
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
2254
perror_plus("waitpid");
2258
if(WIFEXITED(status)){
2259
if(WEXITSTATUS(status) != 0){
2260
fprintf_plus(stderr, "Warning: network hook \"%s\" exited"
2261
" with status %d\n", direntry->d_name,
2262
WEXITSTATUS(status));
2266
} else if(WIFSIGNALED(status)){
2267
fprintf_plus(stderr, "Warning: network hook \"%s\" died by"
2268
" signal %d\n", direntry->d_name,
2273
fprintf_plus(stderr, "Warning: network hook \"%s\""
2274
" crashed\n", direntry->d_name);
2280
fprintf_plus(stderr, "Network hook \"%s\" ran successfully\n",
2286
if(close(hookdir_fd) == -1){
2287
perror_plus("close");
2294
__attribute__((nonnull, warn_unused_result))
2295
int bring_up_interface(const char *const interface,
2297
int old_errno = errno;
2299
struct ifreq network;
2300
unsigned int if_index = if_nametoindex(interface);
2302
fprintf_plus(stderr, "No such interface: \"%s\"\n", interface);
2312
if(not interface_is_up(interface)){
2314
int ioctl_errno = 0;
2315
if(not get_flags(interface, &network)){
2317
fprintf_plus(stderr, "Failed to get flags for interface "
2318
"\"%s\"\n", interface);
2322
network.ifr_flags |= IFF_UP; /* set flag */
2324
int sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
2327
perror_plus("socket");
2335
perror_plus("close");
2342
fprintf_plus(stderr, "Bringing up interface \"%s\"\n",
2346
/* Raise privileges */
2347
ret_errno = raise_privileges();
2350
perror_plus("Failed to raise privileges");
2355
bool restore_loglevel = false;
2357
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
2358
messages about the network interface to mess up the prompt */
2359
ret_linux = klogctl(8, NULL, 5);
2360
if(ret_linux == -1){
2361
perror_plus("klogctl");
2363
restore_loglevel = true;
2366
#endif /* __linux__ */
2367
int ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
2368
ioctl_errno = errno;
2370
if(restore_loglevel){
2371
ret_linux = klogctl(7, NULL, 0);
2372
if(ret_linux == -1){
2373
perror_plus("klogctl");
2376
#endif /* __linux__ */
2378
/* If raise_privileges() succeeded above */
2380
/* Lower privileges */
2381
ret_errno = lower_privileges();
2384
perror_plus("Failed to lower privileges");
2388
/* Close the socket */
2391
perror_plus("close");
2394
if(ret_setflags == -1){
2395
errno = ioctl_errno;
2396
perror_plus("ioctl SIOCSIFFLAGS +IFF_UP");
2401
fprintf_plus(stderr, "Interface \"%s\" is already up; good\n",
2405
/* Sleep checking until interface is running.
2406
Check every 0.25s, up to total time of delay */
2407
for(int i = 0; i < delay * 4; i++){
2408
if(interface_is_running(interface)){
2411
struct timespec sleeptime = { .tv_nsec = 250000000 };
2412
ret = nanosleep(&sleeptime, NULL);
2413
if(ret == -1 and errno != EINTR){
2414
perror_plus("nanosleep");
2422
__attribute__((nonnull, warn_unused_result))
2423
int take_down_interface(const char *const interface){
2424
int old_errno = errno;
2425
struct ifreq network;
2426
unsigned int if_index = if_nametoindex(interface);
2428
fprintf_plus(stderr, "No such interface: \"%s\"\n", interface);
2432
if(interface_is_up(interface)){
2434
int ioctl_errno = 0;
2435
if(not get_flags(interface, &network) and debug){
2437
fprintf_plus(stderr, "Failed to get flags for interface "
2438
"\"%s\"\n", interface);
2442
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
2444
int sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
2447
perror_plus("socket");
2453
fprintf_plus(stderr, "Taking down interface \"%s\"\n",
2457
/* Raise privileges */
2458
ret_errno = raise_privileges();
2461
perror_plus("Failed to raise privileges");
2464
int ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
2465
ioctl_errno = errno;
2467
/* If raise_privileges() succeeded above */
2469
/* Lower privileges */
2470
ret_errno = lower_privileges();
2473
perror_plus("Failed to lower privileges");
2477
/* Close the socket */
2478
int ret = close(sd);
2480
perror_plus("close");
2483
if(ret_setflags == -1){
2484
errno = ioctl_errno;
2485
perror_plus("ioctl SIOCSIFFLAGS -IFF_UP");
2490
fprintf_plus(stderr, "Interface \"%s\" is already down; odd\n",
2498
1275
int main(int argc, char *argv[]){
2499
mandos_context mc = { .server = NULL, .dh_bits = 0,
2500
#if GNUTLS_VERSION_NUMBER >= 0x030606
2501
.priority = "SECURE128:!CTYPE-X.509"
2502
":+CTYPE-RAWPK:!RSA:!VERS-ALL:+VERS-TLS1.3"
2504
#elif GNUTLS_VERSION_NUMBER < 0x030600
2505
.priority = "SECURE256:!CTYPE-X.509"
2506
":+CTYPE-OPENPGP:!RSA:+SIGN-DSA-SHA256",
2508
#error "Needs GnuTLS 3.6.6 or later, or before 3.6.0"
2510
.current_server = NULL, .interfaces = NULL,
2511
.interfaces_size = 0 };
2512
1276
AvahiSServiceBrowser *sb = NULL;
2515
1279
intmax_t tmpmax;
2517
1281
int exitcode = EXIT_SUCCESS;
2518
char *interfaces_to_take_down = NULL;
2519
size_t interfaces_to_take_down_size = 0;
2520
char run_tempdir[] = "/run/tmp/mandosXXXXXX";
2521
char old_tempdir[] = "/tmp/mandosXXXXXX";
2522
char *tempdir = NULL;
1282
const char *interface = "";
1283
struct ifreq network;
1285
bool take_down_interface = false;
1288
char tempdir[] = "/tmp/mandosXXXXXX";
1289
bool tempdir_created = false;
2523
1290
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
2524
1291
const char *seckey = PATHDIR "/" SECKEY;
2525
1292
const char *pubkey = PATHDIR "/" PUBKEY;
2526
#if GNUTLS_VERSION_NUMBER >= 0x030606
2527
const char *tls_privkey = PATHDIR "/" TLS_PRIVKEY;
2528
const char *tls_pubkey = PATHDIR "/" TLS_PUBKEY;
2530
const char *dh_params_file = NULL;
2531
char *interfaces_hooks = NULL;
2533
1294
bool gnutls_initialized = false;
2534
1295
bool gpgme_initialized = false;
2748
/* Re-raise privileges */
2749
ret = raise_privileges();
2752
perror_plus("Failed to raise privileges");
2756
/* Work around Debian bug #633582:
2757
<https://bugs.debian.org/633582> */
2759
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
2760
int seckey_fd = open(seckey, O_RDONLY);
2761
if(seckey_fd == -1){
2762
perror_plus("open");
2764
ret = (int)TEMP_FAILURE_RETRY(fstat(seckey_fd, &st));
2766
perror_plus("fstat");
2768
if(S_ISREG(st.st_mode)
2769
and st.st_uid == 0 and st.st_gid == 0){
2770
ret = fchown(seckey_fd, uid, gid);
2772
perror_plus("fchown");
2780
if(strcmp(pubkey, PATHDIR "/" PUBKEY) == 0){
2781
int pubkey_fd = open(pubkey, O_RDONLY);
2782
if(pubkey_fd == -1){
2783
perror_plus("open");
2785
ret = (int)TEMP_FAILURE_RETRY(fstat(pubkey_fd, &st));
2787
perror_plus("fstat");
2789
if(S_ISREG(st.st_mode)
2790
and st.st_uid == 0 and st.st_gid == 0){
2791
ret = fchown(pubkey_fd, uid, gid);
2793
perror_plus("fchown");
2801
if(dh_params_file != NULL
2802
and strcmp(dh_params_file, PATHDIR "/dhparams.pem" ) == 0){
2803
int dhparams_fd = open(dh_params_file, O_RDONLY);
2804
if(dhparams_fd == -1){
2805
perror_plus("open");
2807
ret = (int)TEMP_FAILURE_RETRY(fstat(dhparams_fd, &st));
2809
perror_plus("fstat");
2811
if(S_ISREG(st.st_mode)
2812
and st.st_uid == 0 and st.st_gid == 0){
2813
ret = fchown(dhparams_fd, uid, gid);
2815
perror_plus("fchown");
2823
/* Work around Debian bug #981302
2824
<https://bugs.debian.org/981302> */
2825
if(lstat("/dev/fd", &st) != 0 and errno == ENOENT){
2826
ret = symlink("/proc/self/fd", "/dev/fd");
2828
perror_plus("Failed to create /dev/fd symlink");
2832
/* Lower privileges */
2833
ret = lower_privileges();
2836
perror_plus("Failed to lower privileges");
2841
/* Remove invalid interface names (except "none") */
2843
char *interface = NULL;
2844
while((interface = argz_next(mc.interfaces, mc.interfaces_size,
2846
if(strcmp(interface, "none") != 0
2847
and if_nametoindex(interface) == 0){
2848
if(interface[0] != '\0'){
2849
fprintf_plus(stderr, "Not using nonexisting interface"
2850
" \"%s\"\n", interface);
2852
argz_delete(&mc.interfaces, &mc.interfaces_size, interface);
2858
/* Run network hooks */
2860
if(mc.interfaces != NULL){
2861
interfaces_hooks = malloc(mc.interfaces_size);
2862
if(interfaces_hooks == NULL){
2863
perror_plus("malloc");
2866
memcpy(interfaces_hooks, mc.interfaces, mc.interfaces_size);
2867
argz_stringify(interfaces_hooks, mc.interfaces_size, (int)',');
2869
run_network_hooks("start", interfaces_hooks != NULL ?
2870
interfaces_hooks : "", delay);
1462
/* Work around Debian bug #633582:
1463
<http://bugs.debian.org/633582> */
1466
/* Re-raise priviliges */
1470
perror_plus("seteuid");
1473
int seckey_fd = open(PATHDIR "/" SECKEY, O_RDONLY);
1474
if(seckey_fd == -1){
1475
perror_plus("open");
1477
ret = (int)TEMP_FAILURE_RETRY(fstat(seckey_fd, &st));
1479
perror_plus("fstat");
1481
if(S_ISREG(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
1482
ret = fchown(seckey_fd, uid, gid);
1484
perror_plus("fchown");
1488
TEMP_FAILURE_RETRY(close(seckey_fd));
1491
int pubkey_fd = open(PATHDIR "/" PUBKEY, O_RDONLY);
1492
if(pubkey_fd == -1){
1493
perror_plus("open");
1495
ret = (int)TEMP_FAILURE_RETRY(fstat(pubkey_fd, &st));
1497
perror_plus("fstat");
1499
if(S_ISREG(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
1500
ret = fchown(pubkey_fd, uid, gid);
1502
perror_plus("fchown");
1506
TEMP_FAILURE_RETRY(close(pubkey_fd));
1509
/* Lower privileges */
1513
perror_plus("seteuid");
2874
1518
avahi_set_log_function(empty_log);
1521
if(interface[0] == '\0'){
1522
struct dirent **direntries;
1523
ret = scandir(sys_class_net, &direntries, good_interface,
1526
/* Pick the first good interface */
1527
interface = strdup(direntries[0]->d_name);
1529
fprintf(stderr, "Using interface \"%s\"\n", interface);
1531
if(interface == NULL){
1532
perror_plus("malloc");
1534
exitcode = EXIT_FAILURE;
1540
fprintf(stderr, "Could not find a network interface\n");
1541
exitcode = EXIT_FAILURE;
2877
1546
/* Initialize Avahi early so avahi_simple_poll_quit() can be called
2878
1547
from the signal handler */
2879
1548
/* Initialize the pseudo-RNG for Avahi */
2880
1549
srand((unsigned int) time(NULL));
2881
simple_poll = avahi_simple_poll_new();
2882
if(simple_poll == NULL){
2883
fprintf_plus(stderr,
2884
"Avahi: Failed to create simple poll object.\n");
1550
mc.simple_poll = avahi_simple_poll_new();
1551
if(mc.simple_poll == NULL){
1552
fprintf(stderr, "Avahi: Failed to create simple poll object.\n");
2885
1553
exitcode = EX_UNAVAILABLE;
2952
/* If no interfaces were specified, make a list */
2953
if(mc.interfaces == NULL){
2954
struct dirent **direntries = NULL;
2955
/* Look for any good interfaces */
2956
ret = scandir(sys_class_net, &direntries, good_interface,
2959
/* Add all found interfaces to interfaces list */
2960
for(int i = 0; i < ret; ++i){
2961
ret_errno = argz_add(&mc.interfaces, &mc.interfaces_size,
2962
direntries[i]->d_name);
2965
perror_plus("argz_add");
2966
free(direntries[i]);
2970
fprintf_plus(stderr, "Will use interface \"%s\"\n",
2971
direntries[i]->d_name);
2973
free(direntries[i]);
1620
/* If the interface is down, bring it up */
1621
if(strcmp(interface, "none") != 0){
1622
if_index = (AvahiIfIndex) if_nametoindex(interface);
1624
fprintf(stderr, "No such interface: \"%s\"\n", interface);
1625
exitcode = EX_UNAVAILABLE;
1633
/* Re-raise priviliges */
1637
perror_plus("seteuid");
1641
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1642
messages about the network interface to mess up the prompt */
1643
ret = klogctl(8, NULL, 5);
1644
bool restore_loglevel = true;
1646
restore_loglevel = false;
1647
perror_plus("klogctl");
1649
#endif /* __linux__ */
1651
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1653
perror_plus("socket");
1654
exitcode = EX_OSERR;
1656
if(restore_loglevel){
1657
ret = klogctl(7, NULL, 0);
1659
perror_plus("klogctl");
1662
#endif /* __linux__ */
1663
/* Lower privileges */
1667
perror_plus("seteuid");
1671
strcpy(network.ifr_name, interface);
1672
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1674
perror_plus("ioctl SIOCGIFFLAGS");
1676
if(restore_loglevel){
1677
ret = klogctl(7, NULL, 0);
1679
perror_plus("klogctl");
1682
#endif /* __linux__ */
1683
exitcode = EX_OSERR;
1684
/* Lower privileges */
1688
perror_plus("seteuid");
1692
if((network.ifr_flags & IFF_UP) == 0){
1693
network.ifr_flags |= IFF_UP;
1694
take_down_interface = true;
1695
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1697
take_down_interface = false;
1698
perror_plus("ioctl SIOCSIFFLAGS +IFF_UP");
1699
exitcode = EX_OSERR;
1701
if(restore_loglevel){
1702
ret = klogctl(7, NULL, 0);
1704
perror_plus("klogctl");
1707
#endif /* __linux__ */
1708
/* Lower privileges */
1712
perror_plus("seteuid");
1717
/* Sleep checking until interface is running.
1718
Check every 0.25s, up to total time of delay */
1719
for(int i=0; i < delay * 4; i++){
1720
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1722
perror_plus("ioctl SIOCGIFFLAGS");
1723
} else if(network.ifr_flags & IFF_RUNNING){
1726
struct timespec sleeptime = { .tv_nsec = 250000000 };
1727
ret = nanosleep(&sleeptime, NULL);
1728
if(ret == -1 and errno != EINTR){
1729
perror_plus("nanosleep");
1732
if(not take_down_interface){
1733
/* We won't need the socket anymore */
1734
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1736
perror_plus("close");
1740
if(restore_loglevel){
1741
/* Restores kernel loglevel to default */
1742
ret = klogctl(7, NULL, 0);
1744
perror_plus("klogctl");
1747
#endif /* __linux__ */
1748
/* Lower privileges */
1750
if(take_down_interface){
1751
/* Lower privileges */
1754
perror_plus("seteuid");
2980
fprintf_plus(stderr, "Could not find a network interface\n");
2981
exitcode = EXIT_FAILURE;
2986
/* Bring up interfaces which are down, and remove any "none"s */
2988
char *interface = NULL;
2989
while((interface = argz_next(mc.interfaces, mc.interfaces_size,
2991
/* If interface name is "none", stop bringing up interfaces.
2992
Also remove all instances of "none" from the list */
2993
if(strcmp(interface, "none") == 0){
2994
argz_delete(&mc.interfaces, &mc.interfaces_size,
2997
while((interface = argz_next(mc.interfaces,
2998
mc.interfaces_size, interface))){
2999
if(strcmp(interface, "none") == 0){
3000
argz_delete(&mc.interfaces, &mc.interfaces_size,
3007
bool interface_was_up = interface_is_up(interface);
3008
errno = bring_up_interface(interface, delay);
3009
if(not interface_was_up){
3011
fprintf_plus(stderr, "Failed to bring up interface \"%s\":"
3012
" %s\n", interface, strerror(errno));
3014
errno = argz_add(&interfaces_to_take_down,
3015
&interfaces_to_take_down_size,
3018
perror_plus("argz_add");
3023
if(debug and (interfaces_to_take_down == NULL)){
3024
fprintf_plus(stderr, "No interfaces were brought up\n");
3028
/* If we only got one interface, explicitly use only that one */
3029
if(argz_count(mc.interfaces, mc.interfaces_size) == 1){
3031
fprintf_plus(stderr, "Using only interface \"%s\"\n",
3034
if_index = (AvahiIfIndex)if_nametoindex(mc.interfaces);
1757
/* Lower privileges permanently */
1760
perror_plus("setuid");
3041
#if GNUTLS_VERSION_NUMBER >= 0x030606
3042
ret = init_gnutls_global(tls_pubkey, tls_privkey, dh_params_file, &mc);
3043
#elif GNUTLS_VERSION_NUMBER < 0x030600
3044
ret = init_gnutls_global(pubkey, seckey, dh_params_file, &mc);
3046
#error "Needs GnuTLS 3.6.6 or later, or before 3.6.0"
1769
ret = init_gnutls_global(pubkey, seckey);
3049
fprintf_plus(stderr, "init_gnutls_global failed\n");
1771
fprintf(stderr, "init_gnutls_global failed\n");
3050
1772
exitcode = EX_UNAVAILABLE;
3209
1921
/* Run the main loop */
3212
fprintf_plus(stderr, "Starting Avahi loop search\n");
1924
fprintf(stderr, "Starting Avahi loop search\n");
3215
ret = avahi_loop_with_timeout(simple_poll,
3216
(int)(retry_interval * 1000), &mc);
1927
ret = avahi_loop_with_timeout(mc.simple_poll,
1928
(int)(retry_interval * 1000));
3218
fprintf_plus(stderr, "avahi_loop_with_timeout exited %s\n",
3219
(ret == 0) ? "successfully" : "with error");
1930
fprintf(stderr, "avahi_loop_with_timeout exited %s\n",
1931
(ret == 0) ? "successfully" : "with error");
3225
if(signal_received){
3226
fprintf_plus(stderr, "%s exiting due to signal %d: %s\n",
3227
argv[0], signal_received,
3228
strsignal(signal_received));
3230
fprintf_plus(stderr, "%s exiting\n", argv[0]);
1937
fprintf(stderr, "%s exiting\n", argv[0]);
3234
1940
/* Cleanup things */
3235
free(mc.interfaces);
3238
1942
avahi_s_service_browser_free(sb);
3240
1944
if(mc.server != NULL)
3241
1945
avahi_server_free(mc.server);
3243
if(simple_poll != NULL)
3244
avahi_simple_poll_free(simple_poll);
1947
if(mc.simple_poll != NULL)
1948
avahi_simple_poll_free(mc.simple_poll);
3246
1950
if(gnutls_initialized){
3247
1951
gnutls_certificate_free_credentials(mc.cred);
1952
gnutls_global_deinit();
3248
1953
gnutls_dh_params_deinit(mc.dh_params);
3251
1956
if(gpgme_initialized){
3252
1957
gpgme_release(mc.ctx);
3255
1960
/* Cleans up the circular linked list of Mandos servers the client
3257
1962
if(mc.current_server != NULL){
3258
1963
mc.current_server->prev->next = NULL;
3259
1964
while(mc.current_server != NULL){
3260
1965
server *next = mc.current_server->next;
3262
#pragma GCC diagnostic push
3263
#pragma GCC diagnostic ignored "-Wcast-qual"
3265
free((char *)(mc.current_server->ip));
3267
#pragma GCC diagnostic pop
3269
1966
free(mc.current_server);
3270
1967
mc.current_server = next;
3274
/* Re-raise privileges */
3276
ret = raise_privileges();
3279
perror_plus("Failed to raise privileges");
3282
/* Run network hooks */
3283
run_network_hooks("stop", interfaces_hooks != NULL ?
3284
interfaces_hooks : "", delay);
3286
/* Take down the network interfaces which were brought up */
3288
char *interface = NULL;
3289
while((interface = argz_next(interfaces_to_take_down,
3290
interfaces_to_take_down_size,
3292
ret = take_down_interface(interface);
3295
perror_plus("Failed to take down interface");
3298
if(debug and (interfaces_to_take_down == NULL)){
3299
fprintf_plus(stderr, "No interfaces needed to be taken"
3305
ret = lower_privileges_permanently();
3308
perror_plus("Failed to lower privileges permanently");
3312
free(interfaces_to_take_down);
3313
free(interfaces_hooks);
3315
void clean_dir_at(int base, const char * const dirname,
3317
struct dirent **direntries = NULL;
3319
int dir_fd = (int)TEMP_FAILURE_RETRY(openat(base, dirname,
3325
perror_plus("open");
3328
int numentries = scandirat(dir_fd, ".", &direntries,
3329
notdotentries, alphasort);
3330
if(numentries >= 0){
3331
for(int i = 0; i < numentries; i++){
3333
fprintf_plus(stderr, "Unlinking \"%s/%s\"\n",
3334
dirname, direntries[i]->d_name);
3336
dret = unlinkat(dir_fd, direntries[i]->d_name, 0);
3338
if(errno == EISDIR){
3339
dret = unlinkat(dir_fd, direntries[i]->d_name,
3342
if((dret == -1) and (errno == ENOTEMPTY)
3343
and (strcmp(direntries[i]->d_name, "private-keys-v1.d")
3344
== 0) and (level == 0)){
3345
/* Recurse only in this special case */
3346
clean_dir_at(dir_fd, direntries[i]->d_name, level+1);
3349
if((dret == -1) and (errno != ENOENT)){
3350
fprintf_plus(stderr, "unlink(\"%s/%s\"): %s\n", dirname,
3351
direntries[i]->d_name, strerror(errno));
3354
free(direntries[i]);
3357
/* need to clean even if 0 because man page doesn't specify */
3359
dret = unlinkat(base, dirname, AT_REMOVEDIR);
3360
if(dret == -1 and errno != ENOENT){
3361
perror_plus("rmdir");
3364
perror_plus("scandirat");
1971
/* Take down the network interface */
1972
if(take_down_interface){
1973
/* Re-raise priviliges */
1977
perror_plus("seteuid");
1980
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1982
perror_plus("ioctl SIOCGIFFLAGS");
1983
} else if(network.ifr_flags & IFF_UP) {
1984
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
1985
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1987
perror_plus("ioctl SIOCSIFFLAGS -IFF_UP");
1990
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1992
perror_plus("close");
1994
/* Lower privileges permanently */
1998
perror_plus("setuid");
3369
2003
/* Removes the GPGME temp directory and all files inside */
3370
if(tempdir != NULL){
3371
clean_dir_at(-1, tempdir, 0);
2004
if(tempdir_created){
2005
struct dirent **direntries = NULL;
2006
struct dirent *direntry = NULL;
2007
ret = scandir(tempdir, &direntries, notdotentries, alphasort);
2009
for(int i = 0; i < ret; i++){
2010
direntry = direntries[i];
2011
char *fullname = NULL;
2012
ret = asprintf(&fullname, "%s/%s", tempdir,
2015
perror_plus("asprintf");
2018
ret = remove(fullname);
2020
fprintf(stderr, "remove(\"%s\"): %s\n", fullname,
2027
/* need to be cleaned even if ret == 0 because man page doesn't
2031
perror_plus("scandir");
2033
ret = rmdir(tempdir);
2034
if(ret == -1 and errno != ENOENT){
2035
perror_plus("rmdir");