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- Committer: Björn Påhlsson
- Date: 2011-06-23 22:27:15 UTC
- mto: This revision was merged to the branch mainline in revision 485.
- Revision ID: belorn@fukt.bsnet.se-20110623222715-q5wro9ma9iyjl367
* Makefile (CFLAGS): Added "-lrt" to include real time library.
* plugins.d/mandos-client.c: use scandir(3) instead of readdir(3)
Prefix all debug output with "Mandos plugin " + program_invocation_short_name
Retry servers that failed to provide password.
New option --retry SECONDS that sets the interval between rechecking.
--retry also controls how often it retries a server when using --connect.
* plugins.d/splashy.c: Prefix all debug output with "Mandos plugin " + program_invocation_short_name
* plugins.d/usplash.c: --||--
* plugins.d/askpass-fifo.c: --||--
* plugins.d/password-prompt.c: --||--
* plugins.d/plymouth.c: --||--
* mandos: Lower logger level from warning to info on failed client requests because client was disabled or unknown fingerprint.
* plugins.d/plymouth.c (get_pid): bug fix. Was not calling free on direntries.
* plugins.d/mandos-client.c: use scandir(3) instead of readdir(3)
Prefix all debug output with "Mandos plugin " + program_invocation_short_name
Retry servers that failed to provide password.
New option --retry SECONDS that sets the interval between rechecking.
--retry also controls how often it retries a server when using --connect.
* plugins.d/splashy.c: Prefix all debug output with "Mandos plugin " + program_invocation_short_name
* plugins.d/usplash.c: --||--
* plugins.d/askpass-fifo.c: --||--
* plugins.d/password-prompt.c: --||--
* plugins.d/plymouth.c: --||--
* mandos: Lower logger level from warning to info on failed client requests because client was disabled or unknown fingerprint.
* plugins.d/plymouth.c (get_pid): bug fix. Was not calling free on direntries.
- files removed:
- debian/source/local-options
- files modified:
- DBUS-API
added
removed
plugins.d/mandos-client.c
26
26
* along with this program. If not, see
27
27
* <http://www.gnu.org/licenses/>.
28
28
*
29
* Contact the authors at <mandos@recompile.se>.
29
* Contact the authors at <mandos@fukt.bsnet.se>.
30
30
*/
31
31
32
32
/* Needed by GPGME, specifically gpgme_data_seek() */
53
53
sockaddr_in6, PF_INET6,
54
54
SOCK_STREAM, uid_t, gid_t, open(),
55
55
opendir(), DIR */
56
#include <sys/stat.h> /* open(), S_ISREG */
56
#include <sys/stat.h> /* open() */
57
57
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
58
58
inet_pton(), connect() */
59
59
#include <fcntl.h> /* open() */
62
62
#include <inttypes.h> /* PRIu16, PRIdMAX, intmax_t,
63
63
strtoimax() */
64
64
#include <assert.h> /* assert() */
65
#include <errno.h> /* perror(), errno,
66
program_invocation_short_name */
65
#include <errno.h> /* perror(), errno, program_invocation_short_name */
67
66
#include <time.h> /* nanosleep(), time(), sleep() */
68
67
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
69
68
SIOCSIFFLAGS, if_indextoname(),
74
73
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
75
74
getuid(), getgid(), seteuid(),
76
75
setgid(), pause() */
77
#include <arpa/inet.h> /* inet_pton(), htons, inet_ntop() */
76
#include <arpa/inet.h> /* inet_pton(), htons */
78
77
#include <iso646.h> /* not, or, and */
79
78
#include <argp.h> /* struct argp_option, error_t, struct
80
79
argp_state, struct argp,
85
84
raise() */
86
85
#include <sysexits.h> /* EX_OSERR, EX_USAGE, EX_UNAVAILABLE,
87
86
EX_NOHOST, EX_IOERR, EX_PROTOCOL */
88
#include <sys/wait.h> /* waitpid(), WIFEXITED(),
89
WEXITSTATUS(), WTERMSIG() */
90
87
91
88
#ifdef __linux__
92
89
#include <sys/klog.h> /* klogctl() */
110
107
init_gnutls_session(),
111
108
GNUTLS_* */
112
109
#include <gnutls/openpgp.h>
113
/* gnutls_certificate_set_openpgp_key_file(),
114
GNUTLS_OPENPGP_FMT_BASE64 */
110
/* gnutls_certificate_set_openpgp_key_file(),
111
GNUTLS_OPENPGP_FMT_BASE64 */
115
112
116
113
/* GPGME */
117
114
#include <gpgme.h> /* All GPGME types, constants and
125
122
#define PATHDIR "/conf/conf.d/mandos"
126
123
#define SECKEY "seckey.txt"
127
124
#define PUBKEY "pubkey.txt"
128
#define HOOKDIR "/lib/mandos/network-hooks.d"
129
125
130
126
bool debug = false;
131
127
static const char mandos_protocol_version[] = "1";
132
128
const char *argp_program_version = "mandos-client " VERSION;
133
const char *argp_program_bug_address = "<mandos@recompile.se>";
129
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
134
130
static const char sys_class_net[] = "/sys/class/net";
135
131
char *connect_to = NULL;
136
const char *hookdir = HOOKDIR;
137
132
138
/* Doubly linked list that need to be circularly linked when used */
133
/* Doubly linked list that need to be circular linked when ever used */
139
134
typedef struct server{
140
135
const char *ip;
141
136
uint16_t port;
161
156
/* global context so signal handler can reach it*/
162
157
mandos_context mc = { .simple_poll = NULL, .server = NULL,
163
158
.dh_bits = 1024, .priority = "SECURE256"
164
":!CTYPE-X.509:+CTYPE-OPENPGP",
165
.current_server = NULL };
159
":!CTYPE-X.509:+CTYPE-OPENPGP", .current_server = NULL };
166
160
167
161
sig_atomic_t quit_now = 0;
168
162
int signal_received = 0;
169
163
170
164
/* Function to use when printing errors */
171
165
void perror_plus(const char *print_text){
172
fprintf(stderr, "Mandos plugin %s: ",
173
program_invocation_short_name);
166
fprintf(stderr, "Mandos plugin %s: ", program_invocation_short_name);
174
167
perror(print_text);
175
168
}
176
169
180
173
* "buffer_length" is how much is already used.
181
174
*/
182
175
size_t incbuffer(char **buffer, size_t buffer_length,
183
size_t buffer_capacity){
176
size_t buffer_capacity){
184
177
if(buffer_length + BUFFER_SIZE > buffer_capacity){
185
178
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
186
179
if(buffer == NULL){
191
184
return buffer_capacity;
192
185
}
193
186
194
/* Add server to set of servers to retry periodically */
195
int add_server(const char *ip, uint16_t port, AvahiIfIndex if_index,
196
int af){
187
int add_server(const char *ip, uint16_t port,
188
AvahiIfIndex if_index,
189
int af){
197
190
int ret;
198
191
server *new_server = malloc(sizeof(server));
199
192
if(new_server == NULL){
201
194
return -1;
202
195
}
203
196
*new_server = (server){ .ip = strdup(ip),
204
.port = port,
205
.if_index = if_index,
206
.af = af };
197
.port = port,
198
.if_index = if_index,
199
.af = af };
207
200
if(new_server->ip == NULL){
208
201
perror_plus("strdup");
209
return -1;
202
return -1;
210
203
}
211
/* Special case of first server */
204
/* uniqe case of first server */
212
205
if (mc.current_server == NULL){
213
206
new_server->next = new_server;
214
207
new_server->prev = new_server;
215
208
mc.current_server = new_server;
216
/* Place the new server last in the list */
209
/* Placing the new server last in the list */
217
210
} else {
218
211
new_server->next = mc.current_server;
219
212
new_server->prev = mc.current_server->prev;
231
224
/*
232
225
* Initialize GPGME.
233
226
*/
234
static bool init_gpgme(const char *seckey, const char *pubkey,
235
const char *tempdir){
227
static bool init_gpgme(const char *seckey,
228
const char *pubkey, const char *tempdir){
236
229
gpgme_error_t rc;
237
230
gpgme_engine_info_t engine_info;
238
231
253
246
254
247
rc = gpgme_data_new_from_fd(&pgp_data, fd);
255
248
if(rc != GPG_ERR_NO_ERROR){
256
fprintf(stderr, "Mandos plugin mandos-client: "
257
"bad gpgme_data_new_from_fd: %s: %s\n",
249
fprintf(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
258
250
gpgme_strsource(rc), gpgme_strerror(rc));
259
251
return false;
260
252
}
261
253
262
254
rc = gpgme_op_import(mc.ctx, pgp_data);
263
255
if(rc != GPG_ERR_NO_ERROR){
264
fprintf(stderr, "Mandos plugin mandos-client: "
265
"bad gpgme_op_import: %s: %s\n",
256
fprintf(stderr, "bad gpgme_op_import: %s: %s\n",
266
257
gpgme_strsource(rc), gpgme_strerror(rc));
267
258
return false;
268
259
}
276
267
}
277
268
278
269
if(debug){
279
fprintf(stderr, "Mandos plugin mandos-client: "
280
"Initializing GPGME\n");
270
fprintf(stderr, "Initializing GPGME\n");
281
271
}
282
272
283
273
/* Init GPGME */
284
274
gpgme_check_version(NULL);
285
275
rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
286
276
if(rc != GPG_ERR_NO_ERROR){
287
fprintf(stderr, "Mandos plugin mandos-client: "
288
"bad gpgme_engine_check_version: %s: %s\n",
277
fprintf(stderr, "bad gpgme_engine_check_version: %s: %s\n",
289
278
gpgme_strsource(rc), gpgme_strerror(rc));
290
279
return false;
291
280
}
292
281
293
/* Set GPGME home directory for the OpenPGP engine only */
282
/* Set GPGME home directory for the OpenPGP engine only */
294
283
rc = gpgme_get_engine_info(&engine_info);
295
284
if(rc != GPG_ERR_NO_ERROR){
296
fprintf(stderr, "Mandos plugin mandos-client: "
297
"bad gpgme_get_engine_info: %s: %s\n",
285
fprintf(stderr, "bad gpgme_get_engine_info: %s: %s\n",
298
286
gpgme_strsource(rc), gpgme_strerror(rc));
299
287
return false;
300
288
}
307
295
engine_info = engine_info->next;
308
296
}
309
297
if(engine_info == NULL){
310
fprintf(stderr, "Mandos plugin mandos-client: "
311
"Could not set GPGME home dir to %s\n", tempdir);
298
fprintf(stderr, "Could not set GPGME home dir to %s\n", tempdir);
312
299
return false;
313
300
}
314
301
315
302
/* Create new GPGME "context" */
316
303
rc = gpgme_new(&(mc.ctx));
317
304
if(rc != GPG_ERR_NO_ERROR){
318
fprintf(stderr, "Mandos plugin mandos-client: "
319
"bad gpgme_new: %s: %s\n", gpgme_strsource(rc),
320
gpgme_strerror(rc));
305
fprintf(stderr, "bad gpgme_new: %s: %s\n",
306
gpgme_strsource(rc), gpgme_strerror(rc));
321
307
return false;
322
308
}
323
309
342
328
ssize_t plaintext_length = 0;
343
329
344
330
if(debug){
345
fprintf(stderr, "Mandos plugin mandos-client: "
346
"Trying to decrypt OpenPGP data\n");
331
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
347
332
}
348
333
349
334
/* Create new GPGME data buffer from memory cryptotext */
350
335
rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,
351
336
0);
352
337
if(rc != GPG_ERR_NO_ERROR){
353
fprintf(stderr, "Mandos plugin mandos-client: "
354
"bad gpgme_data_new_from_mem: %s: %s\n",
338
fprintf(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
355
339
gpgme_strsource(rc), gpgme_strerror(rc));
356
340
return -1;
357
341
}
359
343
/* Create new empty GPGME data buffer for the plaintext */
360
344
rc = gpgme_data_new(&dh_plain);
361
345
if(rc != GPG_ERR_NO_ERROR){
362
fprintf(stderr, "Mandos plugin mandos-client: "
363
"bad gpgme_data_new: %s: %s\n",
346
fprintf(stderr, "bad gpgme_data_new: %s: %s\n",
364
347
gpgme_strsource(rc), gpgme_strerror(rc));
365
348
gpgme_data_release(dh_crypto);
366
349
return -1;
370
353
data buffer */
371
354
rc = gpgme_op_decrypt(mc.ctx, dh_crypto, dh_plain);
372
355
if(rc != GPG_ERR_NO_ERROR){
373
fprintf(stderr, "Mandos plugin mandos-client: "
374
"bad gpgme_op_decrypt: %s: %s\n",
356
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
375
357
gpgme_strsource(rc), gpgme_strerror(rc));
376
358
plaintext_length = -1;
377
359
if(debug){
378
360
gpgme_decrypt_result_t result;
379
361
result = gpgme_op_decrypt_result(mc.ctx);
380
362
if(result == NULL){
381
fprintf(stderr, "Mandos plugin mandos-client: "
382
"gpgme_op_decrypt_result failed\n");
363
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
383
364
} else {
384
fprintf(stderr, "Mandos plugin mandos-client: "
385
"Unsupported algorithm: %s\n",
365
fprintf(stderr, "Unsupported algorithm: %s\n",
386
366
result->unsupported_algorithm);
387
fprintf(stderr, "Mandos plugin mandos-client: "
388
"Wrong key usage: %u\n",
367
fprintf(stderr, "Wrong key usage: %u\n",
389
368
result->wrong_key_usage);
390
369
if(result->file_name != NULL){
391
fprintf(stderr, "Mandos plugin mandos-client: "
392
"File name: %s\n", result->file_name);
370
fprintf(stderr, "File name: %s\n", result->file_name);
393
371
}
394
372
gpgme_recipient_t recipient;
395
373
recipient = result->recipients;
396
374
while(recipient != NULL){
397
fprintf(stderr, "Mandos plugin mandos-client: "
398
"Public key algorithm: %s\n",
375
fprintf(stderr, "Public key algorithm: %s\n",
399
376
gpgme_pubkey_algo_name(recipient->pubkey_algo));
400
fprintf(stderr, "Mandos plugin mandos-client: "
401
"Key ID: %s\n", recipient->keyid);
402
fprintf(stderr, "Mandos plugin mandos-client: "
403
"Secret key available: %s\n",
377
fprintf(stderr, "Key ID: %s\n", recipient->keyid);
378
fprintf(stderr, "Secret key available: %s\n",
404
379
recipient->status == GPG_ERR_NO_SECKEY
405
380
? "No" : "Yes");
406
381
recipient = recipient->next;
411
386
}
412
387
413
388
if(debug){
414
fprintf(stderr, "Mandos plugin mandos-client: "
415
"Decryption of OpenPGP data succeeded\n");
389
fprintf(stderr, "Decryption of OpenPGP data succeeded\n");
416
390
}
417
391
418
392
/* Seek back to the beginning of the GPGME plaintext data buffer */
425
399
*plaintext = NULL;
426
400
while(true){
427
401
plaintext_capacity = incbuffer(plaintext,
428
(size_t)plaintext_length,
429
plaintext_capacity);
402
(size_t)plaintext_length,
403
plaintext_capacity);
430
404
if(plaintext_capacity == 0){
431
perror_plus("incbuffer");
432
plaintext_length = -1;
433
goto decrypt_end;
405
perror_plus("incbuffer");
406
plaintext_length = -1;
407
goto decrypt_end;
434
408
}
435
409
436
410
ret = gpgme_data_read(dh_plain, *plaintext + plaintext_length,
449
423
}
450
424
451
425
if(debug){
452
fprintf(stderr, "Mandos plugin mandos-client: "
453
"Decrypted password is: ");
426
fprintf(stderr, "Decrypted password is: ");
454
427
for(ssize_t i = 0; i < plaintext_length; i++){
455
428
fprintf(stderr, "%02hhX ", (*plaintext)[i]);
456
429
}
478
451
/* GnuTLS log function callback */
479
452
static void debuggnutls(__attribute__((unused)) int level,
480
453
const char* string){
481
fprintf(stderr, "Mandos plugin mandos-client: GnuTLS: %s", string);
454
fprintf(stderr, "GnuTLS: %s", string);
482
455
}
483
456
484
457
static int init_gnutls_global(const char *pubkeyfilename,
486
459
int ret;
487
460
488
461
if(debug){
489
fprintf(stderr, "Mandos plugin mandos-client: "
490
"Initializing GnuTLS\n");
462
fprintf(stderr, "Initializing GnuTLS\n");
491
463
}
492
464
493
465
ret = gnutls_global_init();
494
466
if(ret != GNUTLS_E_SUCCESS){
495
fprintf(stderr, "Mandos plugin mandos-client: "
496
"GnuTLS global_init: %s\n", safer_gnutls_strerror(ret));
467
fprintf(stderr, "GnuTLS global_init: %s\n",
468
safer_gnutls_strerror(ret));
497
469
return -1;
498
470
}
499
471
506
478
}
507
479
508
480
/* OpenPGP credentials */
509
ret = gnutls_certificate_allocate_credentials(&mc.cred);
481
gnutls_certificate_allocate_credentials(&mc.cred);
510
482
if(ret != GNUTLS_E_SUCCESS){
511
fprintf(stderr, "Mandos plugin mandos-client: "
512
"GnuTLS memory error: %s\n", safer_gnutls_strerror(ret));
483
fprintf(stderr, "GnuTLS memory error: %s\n", /* Spurious warning
484
from
485
-Wunreachable-code
486
*/
487
safer_gnutls_strerror(ret));
513
488
gnutls_global_deinit();
514
489
return -1;
515
490
}
516
491
517
492
if(debug){
518
fprintf(stderr, "Mandos plugin mandos-client: "
519
"Attempting to use OpenPGP public key %s and"
493
fprintf(stderr, "Attempting to use OpenPGP public key %s and"
520
494
" secret key %s as GnuTLS credentials\n", pubkeyfilename,
521
495
seckeyfilename);
522
496
}
526
500
GNUTLS_OPENPGP_FMT_BASE64);
527
501
if(ret != GNUTLS_E_SUCCESS){
528
502
fprintf(stderr,
529
"Mandos plugin mandos-client: "
530
503
"Error[%d] while reading the OpenPGP key pair ('%s',"
531
504
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
532
fprintf(stderr, "Mandos plugin mandos-client: "
533
"The GnuTLS error is: %s\n", safer_gnutls_strerror(ret));
505
fprintf(stderr, "The GnuTLS error is: %s\n",
506
safer_gnutls_strerror(ret));
534
507
goto globalfail;
535
508
}
536
509
537
510
/* GnuTLS server initialization */
538
511
ret = gnutls_dh_params_init(&mc.dh_params);
539
512
if(ret != GNUTLS_E_SUCCESS){
540
fprintf(stderr, "Mandos plugin mandos-client: "
541
"Error in GnuTLS DH parameter initialization:"
513
fprintf(stderr, "Error in GnuTLS DH parameter initialization:"
542
514
" %s\n", safer_gnutls_strerror(ret));
543
515
goto globalfail;
544
516
}
545
517
ret = gnutls_dh_params_generate2(mc.dh_params, mc.dh_bits);
546
518
if(ret != GNUTLS_E_SUCCESS){
547
fprintf(stderr, "Mandos plugin mandos-client: "
548
"Error in GnuTLS prime generation: %s\n",
519
fprintf(stderr, "Error in GnuTLS prime generation: %s\n",
549
520
safer_gnutls_strerror(ret));
550
521
goto globalfail;
551
522
}
572
543
}
573
544
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
574
545
if(ret != GNUTLS_E_SUCCESS){
575
fprintf(stderr, "Mandos plugin mandos-client: "
576
"Error in GnuTLS session initialization: %s\n",
546
fprintf(stderr, "Error in GnuTLS session initialization: %s\n",
577
547
safer_gnutls_strerror(ret));
578
548
}
579
549
587
557
}
588
558
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
589
559
if(ret != GNUTLS_E_SUCCESS){
590
fprintf(stderr, "Mandos plugin mandos-client: "
591
"Syntax error at: %s\n", err);
592
fprintf(stderr, "Mandos plugin mandos-client: "
593
"GnuTLS error: %s\n", safer_gnutls_strerror(ret));
560
fprintf(stderr, "Syntax error at: %s\n", err);
561
fprintf(stderr, "GnuTLS error: %s\n",
562
safer_gnutls_strerror(ret));
594
563
gnutls_deinit(*session);
595
564
return -1;
596
565
}
605
574
}
606
575
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
607
576
if(ret != GNUTLS_E_SUCCESS){
608
fprintf(stderr, "Mandos plugin mandos-client: "
609
"Error setting GnuTLS credentials: %s\n",
577
fprintf(stderr, "Error setting GnuTLS credentials: %s\n",
610
578
safer_gnutls_strerror(ret));
611
579
gnutls_deinit(*session);
612
580
return -1;
658
626
pf = PF_INET;
659
627
break;
660
628
default:
661
fprintf(stderr, "Mandos plugin mandos-client: "
662
"Bad address family: %d\n", af);
629
fprintf(stderr, "Bad address family: %d\n", af);
663
630
errno = EINVAL;
664
631
return -1;
665
632
}
670
637
}
671
638
672
639
if(debug){
673
fprintf(stderr, "Mandos plugin mandos-client: "
674
"Setting up a TCP connection to %s, port %" PRIu16
640
fprintf(stderr, "Setting up a TCP connection to %s, port %" PRIu16
675
641
"\n", ip, port);
676
642
}
677
643
704
670
}
705
671
if(ret == 0){
706
672
int e = errno;
707
fprintf(stderr, "Mandos plugin mandos-client: "
708
"Bad address: %s\n", ip);
673
fprintf(stderr, "Bad address: %s\n", ip);
709
674
errno = e;
710
675
goto mandos_end;
711
676
}
716
681
717
682
if(IN6_IS_ADDR_LINKLOCAL /* Spurious warnings from */
718
683
(&to.in6.sin6_addr)){ /* -Wstrict-aliasing=2 or lower and
719
-Wunreachable-code*/
684
-Wunreachable-code*/
720
685
if(if_index == AVAHI_IF_UNSPEC){
721
fprintf(stderr, "Mandos plugin mandos-client: "
722
"An IPv6 link-local address is incomplete"
686
fprintf(stderr, "An IPv6 link-local address is incomplete"
723
687
" without a network interface\n");
724
688
errno = EINVAL;
725
689
goto mandos_end;
744
708
if(if_indextoname((unsigned int)if_index, interface) == NULL){
745
709
perror_plus("if_indextoname");
746
710
} else {
747
fprintf(stderr, "Mandos plugin mandos-client: "
748
"Connection to: %s%%%s, port %" PRIu16 "\n",
711
fprintf(stderr, "Connection to: %s%%%s, port %" PRIu16 "\n",
749
712
ip, interface, port);
750
713
}
751
714
} else {
752
fprintf(stderr, "Mandos plugin mandos-client: "
753
"Connection to: %s, port %" PRIu16 "\n", ip, port);
715
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
716
port);
754
717
}
755
718
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
756
719
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
766
729
perror_plus("inet_ntop");
767
730
} else {
768
731
if(strcmp(addrstr, ip) != 0){
769
fprintf(stderr, "Mandos plugin mandos-client: "
770
"Canonical address form: %s\n", addrstr);
732
fprintf(stderr, "Canonical address form: %s\n", addrstr);
771
733
}
772
734
}
773
735
}
801
763
while(true){
802
764
size_t out_size = strlen(out);
803
765
ret = (int)TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
804
out_size - written));
766
out_size - written));
805
767
if(ret == -1){
806
768
int e = errno;
807
769
perror_plus("write");
827
789
}
828
790
829
791
if(debug){
830
fprintf(stderr, "Mandos plugin mandos-client: "
831
"Establishing TLS session with %s\n", ip);
792
fprintf(stderr, "Establishing TLS session with %s\n", ip);
832
793
}
833
794
834
795
if(quit_now){
835
796
errno = EINTR;
836
797
goto mandos_end;
837
798
}
838
839
/* Spurious warning from -Wint-to-pointer-cast */
799
800
/* Spurious warnings from -Wint-to-pointer-cast */
840
801
gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t) tcp_sd);
841
802
842
803
if(quit_now){
854
815
855
816
if(ret != GNUTLS_E_SUCCESS){
856
817
if(debug){
857
fprintf(stderr, "Mandos plugin mandos-client: "
858
"*** GnuTLS Handshake failed ***\n");
818
fprintf(stderr, "*** GnuTLS Handshake failed ***\n");
859
819
gnutls_perror(ret);
860
820
}
861
821
errno = EPROTO;
865
825
/* Read OpenPGP packet that contains the wanted password */
866
826
867
827
if(debug){
868
fprintf(stderr, "Mandos plugin mandos-client: "
869
"Retrieving OpenPGP encrypted password from %s\n", ip);
828
fprintf(stderr, "Retrieving OpenPGP encrypted password from %s\n",
829
ip);
870
830
}
871
831
872
832
while(true){
877
837
}
878
838
879
839
buffer_capacity = incbuffer(&buffer, buffer_length,
880
buffer_capacity);
840
buffer_capacity);
881
841
if(buffer_capacity == 0){
882
842
int e = errno;
883
843
perror_plus("incbuffer");
910
870
}
911
871
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
912
872
if(ret < 0){
913
fprintf(stderr, "Mandos plugin mandos-client: "
914
"*** GnuTLS Re-handshake failed ***\n");
873
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
915
874
gnutls_perror(ret);
916
875
errno = EPROTO;
917
876
goto mandos_end;
918
877
}
919
878
break;
920
879
default:
921
fprintf(stderr, "Mandos plugin mandos-client: "
922
"Unknown error while reading data from"
880
fprintf(stderr, "Unknown error while reading data from"
923
881
" encrypted session with Mandos server\n");
924
882
gnutls_bye(session, GNUTLS_SHUT_RDWR);
925
883
errno = EIO;
931
889
}
932
890
933
891
if(debug){
934
fprintf(stderr, "Mandos plugin mandos-client: "
935
"Closing TLS session\n");
892
fprintf(stderr, "Closing TLS session\n");
936
893
}
937
894
938
895
if(quit_now){
950
907
951
908
if(buffer_length > 0){
952
909
ssize_t decrypted_buffer_size;
953
decrypted_buffer_size = pgp_packet_decrypt(buffer, buffer_length,
910
decrypted_buffer_size = pgp_packet_decrypt(buffer,
911
buffer_length,
954
912
&decrypted_buffer);
955
913
if(decrypted_buffer_size >= 0){
956
914
967
925
if(ret == 0 and ferror(stdout)){
968
926
int e = errno;
969
927
if(debug){
970
fprintf(stderr, "Mandos plugin mandos-client: "
971
"Error writing encrypted data: %s\n",
928
fprintf(stderr, "Error writing encrypted data: %s\n",
972
929
strerror(errno));
973
930
}
974
931
errno = e;
1032
989
switch(event){
1033
990
default:
1034
991
case AVAHI_RESOLVER_FAILURE:
1035
fprintf(stderr, "Mandos plugin mandos-client: "
1036
"(Avahi Resolver) Failed to resolve service '%s'"
992
fprintf(stderr, "(Avahi Resolver) Failed to resolve service '%s'"
1037
993
" of type '%s' in domain '%s': %s\n", name, type, domain,
1038
994
avahi_strerror(avahi_server_errno(mc.server)));
1039
995
break;
1043
999
char ip[AVAHI_ADDRESS_STR_MAX];
1044
1000
avahi_address_snprint(ip, sizeof(ip), address);
1045
1001
if(debug){
1046
fprintf(stderr, "Mandos plugin mandos-client: "
1047
"Mandos server \"%s\" found on %s (%s, %"
1002
fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %"
1048
1003
PRIdMAX ") on port %" PRIu16 "\n", name, host_name,
1049
1004
ip, (intmax_t)interface, port);
1050
1005
}
1084
1039
default:
1085
1040
case AVAHI_BROWSER_FAILURE:
1086
1041
1087
fprintf(stderr, "Mandos plugin mandos-client: "
1088
"(Avahi browser) %s\n",
1042
fprintf(stderr, "(Avahi browser) %s\n",
1089
1043
avahi_strerror(avahi_server_errno(mc.server)));
1090
1044
avahi_simple_poll_quit(mc.simple_poll);
1091
1045
return;
1099
1053
if(avahi_s_service_resolver_new(mc.server, interface, protocol,
1100
1054
name, type, domain, protocol, 0,
1101
1055
resolve_callback, NULL) == NULL)
1102
fprintf(stderr, "Mandos plugin mandos-client: "
1103
"Avahi: Failed to resolve service '%s': %s\n",
1056
fprintf(stderr, "Avahi: Failed to resolve service '%s': %s\n",
1104
1057
name, avahi_strerror(avahi_server_errno(mc.server)));
1105
1058
break;
1106
1059
1110
1063
case AVAHI_BROWSER_ALL_FOR_NOW:
1111
1064
case AVAHI_BROWSER_CACHE_EXHAUSTED:
1112
1065
if(debug){
1113
fprintf(stderr, "Mandos plugin mandos-client: "
1114
"No Mandos server found, still searching...\n");
1066
fprintf(stderr, "No Mandos server found, still searching...\n");
1115
1067
}
1116
1068
break;
1117
1069
}
1118
1070
}
1119
1071
1120
/* Signal handler that stops main loop after SIGTERM */
1072
/* Signal handler that stops main loop after sigterm has been called */
1121
1073
static void handle_sigterm(int sig){
1122
1074
if(quit_now){
1123
1075
return;
1132
1084
errno = old_errno;
1133
1085
}
1134
1086
1135
bool get_flags(const char *ifname, struct ifreq *ifr){
1136
int ret;
1137
1138
int s = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1139
if(s < 0){
1140
perror_plus("socket");
1141
return false;
1142
}
1143
strcpy(ifr->ifr_name, ifname);
1144
ret = ioctl(s, SIOCGIFFLAGS, ifr);
1145
if(ret == -1){
1087
/*
1088
* This function determines if a directory entry in /sys/class/net
1089
* corresponds to an acceptable network device.
1090
* (This function is passed to scandir(3) as a filter function.)
1091
*/
1092
int good_interface(const struct dirent *if_entry){
1093
ssize_t ssret;
1094
char *flagname = NULL;
1095
if(if_entry->d_name[0] == '.'){
1096
return 0;
1097
}
1098
int ret = asprintf(&flagname, "%s/%s/flags", sys_class_net,
1099
if_entry->d_name);
1100
if(ret < 0){
1101
perror_plus("asprintf");
1102
return 0;
1103
}
1104
int flags_fd = (int)TEMP_FAILURE_RETRY(open(flagname, O_RDONLY));
1105
if(flags_fd == -1){
1106
perror_plus("open");
1107
free(flagname);
1108
return 0;
1109
}
1110
free(flagname);
1111
typedef short ifreq_flags; /* ifreq.ifr_flags in netdevice(7) */
1112
/* read line from flags_fd */
1113
ssize_t to_read = (sizeof(ifreq_flags)*2)+3; /* "0x1003\n" */
1114
char *flagstring = malloc((size_t)to_read+1); /* +1 for final \0 */
1115
flagstring[(size_t)to_read] = '\0';
1116
if(flagstring == NULL){
1117
perror_plus("malloc");
1118
close(flags_fd);
1119
return 0;
1120
}
1121
while(to_read > 0){
1122
ssret = (ssize_t)TEMP_FAILURE_RETRY(read(flags_fd, flagstring,
1123
(size_t)to_read));
1124
if(ssret == -1){
1125
perror_plus("read");
1126
free(flagstring);
1127
close(flags_fd);
1128
return 0;
1129
}
1130
to_read -= ssret;
1131
if(ssret == 0){
1132
break;
1133
}
1134
}
1135
close(flags_fd);
1136
intmax_t tmpmax;
1137
char *tmp;
1138
errno = 0;
1139
tmpmax = strtoimax(flagstring, &tmp, 0);
1140
if(errno != 0 or tmp == flagstring or (*tmp != '\0'
1141
and not (isspace(*tmp)))
1142
or tmpmax != (ifreq_flags)tmpmax){
1146
1143
if(debug){
1147
perror_plus("ioctl SIOCGIFFLAGS");
1144
fprintf(stderr, "Invalid flags \"%s\" for interface \"%s\"\n",
1145
flagstring, if_entry->d_name);
1148
1146
}
1149
return false;
1147
free(flagstring);
1148
return 0;
1150
1149
}
1151
return true;
1152
}
1153
1154
bool good_flags(const char *ifname, const struct ifreq *ifr){
1155
1150
free(flagstring);
1151
ifreq_flags flags = (ifreq_flags)tmpmax;
1156
1152
/* Reject the loopback device */
1157
if(ifr->ifr_flags & IFF_LOOPBACK){
1153
if(flags & IFF_LOOPBACK){
1158
1154
if(debug){
1159
fprintf(stderr, "Mandos plugin mandos-client: "
1160
"Rejecting loopback interface \"%s\"\n", ifname);
1155
fprintf(stderr, "Rejecting loopback interface \"%s\"\n",
1156
if_entry->d_name);
1161
1157
}
1162
return false;
1158
return 0;
1163
1159
}
1164
1160
/* Accept point-to-point devices only if connect_to is specified */
1165
if(connect_to != NULL and (ifr->ifr_flags & IFF_POINTOPOINT)){
1161
if(connect_to != NULL and (flags & IFF_POINTOPOINT)){
1166
1162
if(debug){
1167
fprintf(stderr, "Mandos plugin mandos-client: "
1168
"Accepting point-to-point interface \"%s\"\n", ifname);
1163
fprintf(stderr, "Accepting point-to-point interface \"%s\"\n",
1164
if_entry->d_name);
1169
1165
}
1170
return true;
1166
return 1;
1171
1167
}
1172
1168
/* Otherwise, reject non-broadcast-capable devices */
1173
if(not (ifr->ifr_flags & IFF_BROADCAST)){
1169
if(not (flags & IFF_BROADCAST)){
1174
1170
if(debug){
1175
fprintf(stderr, "Mandos plugin mandos-client: "
1176
"Rejecting non-broadcast interface \"%s\"\n", ifname);
1171
fprintf(stderr, "Rejecting non-broadcast interface \"%s\"\n",
1172
if_entry->d_name);
1177
1173
}
1178
return false;
1174
return 0;
1179
1175
}
1180
1176
/* Reject non-ARP interfaces (including dummy interfaces) */
1181
if(ifr->ifr_flags & IFF_NOARP){
1177
if(flags & IFF_NOARP){
1182
1178
if(debug){
1183
fprintf(stderr, "Mandos plugin mandos-client: "
1184
"Rejecting non-ARP interface \"%s\"\n", ifname);
1179
fprintf(stderr, "Rejecting non-ARP interface \"%s\"\n",
1180
if_entry->d_name);
1185
1181
}
1186
return false;
1182
return 0;
1187
1183
}
1188
1189
1184
/* Accept this device */
1190
1185
if(debug){
1191
fprintf(stderr, "Mandos plugin mandos-client: "
1192
"Interface \"%s\" is good\n", ifname);
1193
}
1194
return true;
1195
}
1196
1197
/*
1198
* This function determines if a directory entry in /sys/class/net
1199
* corresponds to an acceptable network device.
1200
* (This function is passed to scandir(3) as a filter function.)
1201
*/
1202
int good_interface(const struct dirent *if_entry){
1203
if(if_entry->d_name[0] == '.'){
1204
return 0;
1205
}
1206
1207
struct ifreq ifr;
1208
if(not get_flags(if_entry->d_name, &ifr)){
1209
if(debug){
1210
fprintf(stderr, "Mandos plugin mandos-client: "
1211
"Failed to get flags for interface \"%s\"\n",
1212
if_entry->d_name);
1213
}
1214
return 0;
1215
}
1216
1217
if(not good_flags(if_entry->d_name, &ifr)){
1218
return 0;
1219
}
1220
return 1;
1221
}
1222
1223
/*
1224
* This function determines if a directory entry in /sys/class/net
1225
* corresponds to an acceptable network device which is up.
1226
* (This function is passed to scandir(3) as a filter function.)
1227
*/
1228
int up_interface(const struct dirent *if_entry){
1229
if(if_entry->d_name[0] == '.'){
1230
return 0;
1231
}
1232
1233
struct ifreq ifr;
1234
if(not get_flags(if_entry->d_name, &ifr)){
1235
if(debug){
1236
fprintf(stderr, "Mandos plugin mandos-client: "
1237
"Failed to get flags for interface \"%s\"\n",
1238
if_entry->d_name);
1239
}
1240
return 0;
1241
}
1242
1243
/* Reject down interfaces */
1244
if(not (ifr.ifr_flags & IFF_UP)){
1245
if(debug){
1246
fprintf(stderr, "Mandos plugin mandos-client: "
1247
"Rejecting down interface \"%s\"\n",
1248
if_entry->d_name);
1249
}
1250
return 0;
1251
}
1252
1253
/* Reject non-running interfaces */
1254
if(not (ifr.ifr_flags & IFF_RUNNING)){
1255
if(debug){
1256
fprintf(stderr, "Mandos plugin mandos-client: "
1257
"Rejecting non-running interface \"%s\"\n",
1258
if_entry->d_name);
1259
}
1260
return 0;
1261
}
1262
1263
if(not good_flags(if_entry->d_name, &ifr)){
1264
return 0;
1186
fprintf(stderr, "Interface \"%s\" is acceptable\n",
1187
if_entry->d_name);
1265
1188
}
1266
1189
return 1;
1267
1190
}
1277
1200
return 1;
1278
1201
}
1279
1202
1280
/* Is this directory entry a runnable program? */
1281
int runnable_hook(const struct dirent *direntry){
1282
int ret;
1283
size_t sret;
1284
struct stat st;
1285
1286
if((direntry->d_name)[0] == '\0'){
1287
/* Empty name? */
1288
return 0;
1289
}
1290
1291
sret = strspn(direntry->d_name, "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
1292
"abcdefghijklmnopqrstuvwxyz"
1293
"0123456789"
1294
"_-");
1295
if((direntry->d_name)[sret] != '\0'){
1296
/* Contains non-allowed characters */
1297
if(debug){
1298
fprintf(stderr, "Mandos plugin mandos-client: "
1299
"Ignoring hook \"%s\" with bad name\n",
1300
direntry->d_name);
1301
}
1302
return 0;
1303
}
1304
1305
char *fullname = NULL;
1306
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1307
if(ret < 0){
1308
perror_plus("asprintf");
1309
return 0;
1310
}
1311
1312
ret = stat(fullname, &st);
1313
if(ret == -1){
1314
if(debug){
1315
perror_plus("Could not stat hook");
1316
}
1317
return 0;
1318
}
1319
if(not (S_ISREG(st.st_mode))){
1320
/* Not a regular file */
1321
if(debug){
1322
fprintf(stderr, "Mandos plugin mandos-client: "
1323
"Ignoring hook \"%s\" - not a file\n",
1324
direntry->d_name);
1325
}
1326
return 0;
1327
}
1328
if(not (st.st_mode & (S_IXUSR | S_IXGRP | S_IXOTH))){
1329
/* Not executable */
1330
if(debug){
1331
fprintf(stderr, "Mandos plugin mandos-client: "
1332
"Ignoring hook \"%s\" - not executable\n",
1333
direntry->d_name);
1334
}
1335
return 0;
1336
}
1337
return 1;
1338
}
1339
1340
1203
int avahi_loop_with_timeout(AvahiSimplePoll *s, int retry_interval){
1341
1204
int ret;
1342
1205
struct timespec now;
1343
1206
struct timespec waited_time;
1344
1207
intmax_t block_time;
1345
1208
1346
1209
while(true){
1347
1210
if(mc.current_server == NULL){
1348
1211
if (debug){
1349
fprintf(stderr, "Mandos plugin mandos-client: "
1350
"Wait until first server is found. No timeout!\n");
1212
fprintf(stderr, "Wait until first server is found. No timeout!\n");
1351
1213
}
1352
1214
ret = avahi_simple_poll_iterate(s, -1);
1353
1215
} else {
1354
1216
if (debug){
1355
fprintf(stderr, "Mandos plugin mandos-client: "
1356
"Check current_server if we should run it,"
1357
" or wait\n");
1217
fprintf(stderr, "Check current_server if we should run it, or wait\n");
1358
1218
}
1359
1219
/* the current time */
1360
1220
ret = clock_gettime(CLOCK_MONOTONIC, &now);
1364
1224
}
1365
1225
/* Calculating in ms how long time between now and server
1366
1226
who we visted longest time ago. Now - last seen. */
1367
waited_time.tv_sec = (now.tv_sec
1368
- mc.current_server->last_seen.tv_sec);
1369
waited_time.tv_nsec = (now.tv_nsec
1370
- mc.current_server->last_seen.tv_nsec);
1371
/* total time is 10s/10,000ms.
1372
Converting to s from ms by dividing by 1,000,
1373
and ns to ms by dividing by 1,000,000. */
1374
block_time = ((retry_interval
1375
- ((intmax_t)waited_time.tv_sec * 1000))
1376
- ((intmax_t)waited_time.tv_nsec / 1000000));
1377
1227
waited_time.tv_sec = now.tv_sec - mc.current_server->last_seen.tv_sec;
1228
waited_time.tv_nsec = now.tv_nsec - mc.current_server->last_seen.tv_nsec;
1229
/* total time is 10s/10000ms. Converting to s to ms by 1000/s, and ns to ms by divind by 1000000. */
1230
block_time = (retry_interval - ((intmax_t)waited_time.tv_sec * 1000)) - ((intmax_t)waited_time.tv_nsec / 1000000);
1231
1378
1232
if (debug){
1379
fprintf(stderr, "Mandos plugin mandos-client: "
1380
"Blocking for %" PRIdMAX " ms\n", block_time);
1233
fprintf(stderr, "Blocking for %ld ms\n", block_time);
1381
1234
}
1382
1235
1383
1236
if(block_time <= 0){
1384
1237
ret = start_mandos_communication(mc.current_server->ip,
1385
mc.current_server->port,
1386
mc.current_server->if_index,
1387
mc.current_server->af);
1238
mc.current_server->port,
1239
mc.current_server->if_index,
1240
mc.current_server->af);
1388
1241
if(ret == 0){
1389
1242
avahi_simple_poll_quit(mc.simple_poll);
1390
1243
return 0;
1391
1244
}
1392
ret = clock_gettime(CLOCK_MONOTONIC,
1393
&mc.current_server->last_seen);
1245
ret = clock_gettime(CLOCK_MONOTONIC, &mc.current_server->last_seen);
1394
1246
if(ret == -1){
1395
1247
perror_plus("clock_gettime");
1396
1248
return -1;
1397
1249
}
1398
1250
mc.current_server = mc.current_server->next;
1399
block_time = 0; /* Call avahi to find new Mandos
1400
servers, but don't block */
1251
block_time = 0; /* call avahi to find new mandos servers, but dont block */
1401
1252
}
1402
1253
1403
1254
ret = avahi_simple_poll_iterate(s, (int)block_time);
1404
1255
}
1405
1256
if(ret != 0){
1406
if (ret > 0 or errno != EINTR){
1257
if (ret > 0 or errno != EINTR) {
1407
1258
return (ret != 1) ? ret : 0;
1408
1259
}
1409
1260
}
1410
1261
}
1411
1262
}
1412
1263
1413
bool run_network_hooks(const char *mode, const char *interface,
1414
const float delay){
1415
struct dirent **direntries;
1416
struct dirent *direntry;
1417
int ret;
1418
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1419
alphasort);
1420
if(numhooks == -1){
1421
perror_plus("scandir");
1422
} else {
1423
int devnull = open("/dev/null", O_RDONLY);
1424
for(int i = 0; i < numhooks; i++){
1425
direntry = direntries[0];
1426
char *fullname = NULL;
1427
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1428
if(ret < 0){
1429
perror_plus("asprintf");
1430
continue;
1431
}
1432
pid_t hook_pid = fork();
1433
if(hook_pid == 0){
1434
/* Child */
1435
dup2(devnull, STDIN_FILENO);
1436
close(devnull);
1437
dup2(STDERR_FILENO, STDOUT_FILENO);
1438
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1439
if(ret == -1){
1440
perror_plus("setenv");
1441
return false;
1442
}
1443
ret = setenv("DEVICE", interface, 1);
1444
if(ret == -1){
1445
perror_plus("setenv");
1446
return false;
1447
}
1448
ret = setenv("VERBOSE", debug ? "1" : "0", 1);
1449
if(ret == -1){
1450
perror_plus("setenv");
1451
return false;
1452
}
1453
ret = setenv("MODE", mode, 1);
1454
if(ret == -1){
1455
perror_plus("setenv");
1456
return false;
1457
}
1458
char *delaystring;
1459
ret = asprintf(&delaystring, "%f", delay);
1460
if(ret == -1){
1461
perror_plus("asprintf");
1462
return false;
1463
}
1464
ret = setenv("DELAY", delaystring, 1);
1465
if(ret == -1){
1466
free(delaystring);
1467
perror_plus("setenv");
1468
return false;
1469
}
1470
free(delaystring);
1471
ret = execl(fullname, direntry->d_name, mode, NULL);
1472
perror_plus("execl");
1473
} else {
1474
int status;
1475
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
1476
perror_plus("waitpid");
1477
free(fullname);
1478
continue;
1479
}
1480
if(WIFEXITED(status)){
1481
if(WEXITSTATUS(status) != 0){
1482
fprintf(stderr, "Mandos plugin mandos-client: "
1483
"Warning: network hook \"%s\" exited"
1484
" with status %d\n", direntry->d_name,
1485
WEXITSTATUS(status));
1486
free(fullname);
1487
continue;
1488
}
1489
} else if(WIFSIGNALED(status)){
1490
fprintf(stderr, "Mandos plugin mandos-client: "
1491
"Warning: network hook \"%s\" died by"
1492
" signal %d\n", direntry->d_name,
1493
WTERMSIG(status));
1494
free(fullname);
1495
continue;
1496
} else {
1497
fprintf(stderr, "Mandos plugin mandos-client: "
1498
"Warning: network hook \"%s\" crashed\n",
1499
direntry->d_name);
1500
free(fullname);
1501
continue;
1502
}
1503
}
1504
free(fullname);
1505
if(quit_now){
1506
break;
1507
}
1508
}
1509
close(devnull);
1510
}
1511
return true;
1512
}
1513
1514
1264
int main(int argc, char *argv[]){
1515
1265
AvahiSServiceBrowser *sb = NULL;
1516
1266
int error;
1533
1283
bool gnutls_initialized = false;
1534
1284
bool gpgme_initialized = false;
1535
1285
float delay = 2.5f;
1536
double retry_interval = 10; /* 10s between trying a server and
1537
retrying the same server again */
1286
double retry_interval = 10; /* 10s between retrying a server and checking again*/
1538
1287
1539
1288
struct sigaction old_sigterm_action = { .sa_handler = SIG_DFL };
1540
1289
struct sigaction sigterm_action = { .sa_handler = handle_sigterm };
1598
1347
.arg = "SECONDS",
1599
1348
.doc = "Retry interval used when denied by the mandos server",
1600
1349
.group = 2 },
1601
{ .name = "network-hook-dir", .key = 133,
1602
.arg = "DIR",
1603
.doc = "Directory where network hooks are located",
1604
.group = 2 },
1605
1350
/*
1606
1351
* These reproduce what we would get without ARGP_NO_HELP
1607
1352
*/
1655
1400
errno = 0;
1656
1401
retry_interval = strtod(arg, &tmp);
1657
1402
if(errno != 0 or tmp == arg or *tmp != '\0'
1658
or (retry_interval * 1000) > INT_MAX
1659
or retry_interval < 0){
1403
or (retry_interval * 1000) > INT_MAX){
1660
1404
argp_error(state, "Bad retry interval");
1661
1405
}
1662
1406
break;
1663
case 133: /* --network-hook-dir */
1664
hookdir = arg;
1665
break;
1666
1407
/*
1667
1408
* These reproduce what we would get without ARGP_NO_HELP
1668
1409
*/
1674
1415
argp_state_help(state, state->out_stream,
1675
1416
ARGP_HELP_USAGE | ARGP_HELP_EXIT_ERR);
1676
1417
case 'V': /* --version */
1677
fprintf(state->out_stream, "Mandos plugin mandos-client: ");
1678
1418
fprintf(state->out_stream, "%s\n", argp_program_version);
1679
1419
exit(argp_err_exit_status);
1680
1420
break;
1704
1444
goto end;
1705
1445
}
1706
1446
}
1707
1708
{
1709
/* Work around Debian bug #633582:
1710
<http://bugs.debian.org/633582> */
1711
struct stat st;
1712
1713
/* Re-raise priviliges */
1714
errno = 0;
1715
ret = seteuid(0);
1716
if(ret == -1){
1717
perror_plus("seteuid");
1718
}
1719
1720
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
1721
int seckey_fd = open(seckey, O_RDONLY);
1722
if(seckey_fd == -1){
1723
perror_plus("open");
1724
} else {
1725
ret = (int)TEMP_FAILURE_RETRY(fstat(seckey_fd, &st));
1726
if(ret == -1){
1727
perror_plus("fstat");
1728
} else {
1729
if(S_ISREG(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
1730
ret = fchown(seckey_fd, uid, gid);
1731
if(ret == -1){
1732
perror_plus("fchown");
1733
}
1734
}
1735
}
1736
TEMP_FAILURE_RETRY(close(seckey_fd));
1737
}
1738
}
1739
1740
if(strcmp(pubkey, PATHDIR "/" PUBKEY) == 0){
1741
int pubkey_fd = open(pubkey, O_RDONLY);
1742
if(pubkey_fd == -1){
1743
perror_plus("open");
1744
} else {
1745
ret = (int)TEMP_FAILURE_RETRY(fstat(pubkey_fd, &st));
1746
if(ret == -1){
1747
perror_plus("fstat");
1748
} else {
1749
if(S_ISREG(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
1750
ret = fchown(pubkey_fd, uid, gid);
1751
if(ret == -1){
1752
perror_plus("fchown");
1753
}
1754
}
1755
}
1756
TEMP_FAILURE_RETRY(close(pubkey_fd));
1757
}
1758
}
1759
1760
/* Lower privileges */
1761
errno = 0;
1762
ret = seteuid(uid);
1763
if(ret == -1){
1764
perror_plus("seteuid");
1765
}
1766
}
1767
1768
/* Run network hooks */
1769
{
1770
/* Re-raise priviliges */
1771
errno = 0;
1772
ret = seteuid(0);
1773
if(ret == -1){
1774
perror_plus("seteuid");
1775
}
1776
if(not run_network_hooks("start", interface, delay)){
1777
goto end;
1778
}
1779
/* Lower privileges */
1780
errno = 0;
1781
ret = seteuid(uid);
1782
if(ret == -1){
1783
perror_plus("seteuid");
1784
}
1785
}
1786
1447
1787
1448
if(not debug){
1788
1449
avahi_set_log_function(empty_log);
1789
1450
}
1790
1451
1791
1452
if(interface[0] == '\0'){
1792
1453
struct dirent **direntries;
1793
/* First look for interfaces that are up */
1794
ret = scandir(sys_class_net, &direntries, up_interface,
1454
ret = scandir(sys_class_net, &direntries, good_interface,
1795
1455
alphasort);
1796
if(ret == 0){
1797
/* No up interfaces, look for any good interfaces */
1798
free(direntries);
1799
ret = scandir(sys_class_net, &direntries, good_interface,
1800
alphasort);
1801
}
1802
1456
if(ret >= 1){
1803
/* Pick the first interface returned */
1457
/* Pick the first good interface */
1804
1458
interface = strdup(direntries[0]->d_name);
1805
1459
if(debug){
1806
fprintf(stderr, "Mandos plugin mandos-client: "
1807
"Using interface \"%s\"\n", interface);
1460
fprintf(stderr, "Using interface \"%s\"\n", interface);
1808
1461
}
1809
1462
if(interface == NULL){
1810
1463
perror_plus("malloc");
1815
1468
free(direntries);
1816
1469
} else {
1817
1470
free(direntries);
1818
fprintf(stderr, "Mandos plugin mandos-client: "
1819
"Could not find a network interface\n");
1471
fprintf(stderr, "Could not find a network interface\n");
1820
1472
exitcode = EXIT_FAILURE;
1821
1473
goto end;
1822
1474
}
1828
1480
srand((unsigned int) time(NULL));
1829
1481
mc.simple_poll = avahi_simple_poll_new();
1830
1482
if(mc.simple_poll == NULL){
1831
fprintf(stderr, "Mandos plugin mandos-client: "
1832
"Avahi: Failed to create simple poll object.\n");
1483
fprintf(stderr, "Avahi: Failed to create simple poll object.\n");
1833
1484
exitcode = EX_UNAVAILABLE;
1834
1485
goto end;
1835
1486
}
1901
1552
if(strcmp(interface, "none") != 0){
1902
1553
if_index = (AvahiIfIndex) if_nametoindex(interface);
1903
1554
if(if_index == 0){
1904
fprintf(stderr, "Mandos plugin mandos-client: "
1905
"No such interface: \"%s\"\n", interface);
1555
fprintf(stderr, "No such interface: \"%s\"\n", interface);
1906
1556
exitcode = EX_UNAVAILABLE;
1907
1557
goto end;
1908
1558
}
1995
1645
goto end;
1996
1646
}
1997
1647
}
1998
/* Sleep checking until interface is running.
1999
Check every 0.25s, up to total time of delay */
1648
/* sleep checking until interface is running. Check every 0.25s, up to total time of delay */
2000
1649
for(int i=0; i < delay * 4; i++){
2001
1650
ret = ioctl(sd, SIOCGIFFLAGS, &network);
2002
1651
if(ret == -1){
2028
1677
#endif /* __linux__ */
2029
1678
/* Lower privileges */
2030
1679
errno = 0;
2031
/* Lower privileges */
2032
ret = seteuid(uid);
2033
if(ret == -1){
2034
perror_plus("seteuid");
1680
if(take_down_interface){
1681
/* Lower privileges */
1682
ret = seteuid(uid);
1683
if(ret == -1){
1684
perror_plus("seteuid");
1685
}
1686
} else {
1687
/* Lower privileges permanently */
1688
ret = setuid(uid);
1689
if(ret == -1){
1690
perror_plus("setuid");
1691
}
2035
1692
}
2036
1693
}
2037
1694
2041
1698
2042
1699
ret = init_gnutls_global(pubkey, seckey);
2043
1700
if(ret == -1){
2044
fprintf(stderr, "Mandos plugin mandos-client: "
2045
"init_gnutls_global failed\n");
1701
fprintf(stderr, "init_gnutls_global failed\n");
2046
1702
exitcode = EX_UNAVAILABLE;
2047
1703
goto end;
2048
1704
} else {
2064
1720
}
2065
1721
2066
1722
if(not init_gpgme(pubkey, seckey, tempdir)){
2067
fprintf(stderr, "Mandos plugin mandos-client: "
2068
"init_gpgme failed\n");
1723
fprintf(stderr, "init_gpgme failed\n");
2069
1724
exitcode = EX_UNAVAILABLE;
2070
1725
goto end;
2071
1726
} else {
2081
1736
/* (Mainly meant for debugging) */
2082
1737
char *address = strrchr(connect_to, ':');
2083
1738
if(address == NULL){
2084
fprintf(stderr, "Mandos plugin mandos-client: "
2085
"No colon in address\n");
1739
fprintf(stderr, "No colon in address\n");
2086
1740
exitcode = EX_USAGE;
2087
1741
goto end;
2088
1742
}
2096
1750
tmpmax = strtoimax(address+1, &tmp, 10);
2097
1751
if(errno != 0 or tmp == address+1 or *tmp != '\0'
2098
1752
or tmpmax != (uint16_t)tmpmax){
2099
fprintf(stderr, "Mandos plugin mandos-client: "
2100
"Bad port number\n");
1753
fprintf(stderr, "Bad port number\n");
2101
1754
exitcode = EX_USAGE;
2102
1755
goto end;
2103
1756
}
2108
1761
2109
1762
port = (uint16_t)tmpmax;
2110
1763
*address = '\0';
1764
address = connect_to;
2111
1765
/* Colon in address indicates IPv6 */
2112
1766
int af;
2113
if(strchr(connect_to, ':') != NULL){
1767
if(strchr(address, ':') != NULL){
2114
1768
af = AF_INET6;
2115
/* Accept [] around IPv6 address - see RFC 5952 */
2116
if(connect_to[0] == '[' and address[-1] == ']')
2117
{
2118
connect_to++;
2119
address[-1] = '\0';
2120
}
2121
1769
} else {
2122
1770
af = AF_INET;
2123
1771
}
2124
address = connect_to;
2125
1772
2126
1773
if(quit_now){
2127
1774
goto end;
2128
1775
}
2129
1776
2130
1777
while(not quit_now){
2131
1778
ret = start_mandos_communication(address, port, if_index, af);
2132
1779
if(quit_now or ret == 0){
2133
1780
break;
2134
1781
}
2135
if(debug){
2136
fprintf(stderr, "Mandos plugin mandos-client: "
2137
"Retrying in %d seconds\n", (int)retry_interval);
2138
}
2139
sleep((int)retry_interval);
2140
}
2141
1782
sleep((int)retry_interval or 1);
1783
};
1784
2142
1785
if (not quit_now){
2143
1786
exitcode = EXIT_SUCCESS;
2144
1787
}
2145
1788
2146
1789
goto end;
2147
1790
}
2148
1791
2170
1813
2171
1814
/* Check if creating the Avahi server object succeeded */
2172
1815
if(mc.server == NULL){
2173
fprintf(stderr, "Mandos plugin mandos-client: "
2174
"Failed to create Avahi server: %s\n",
1816
fprintf(stderr, "Failed to create Avahi server: %s\n",
2175
1817
avahi_strerror(error));
2176
1818
exitcode = EX_UNAVAILABLE;
2177
1819
goto end;
2186
1828
AVAHI_PROTO_UNSPEC, "_mandos._tcp",
2187
1829
NULL, 0, browse_callback, NULL);
2188
1830
if(sb == NULL){
2189
fprintf(stderr, "Mandos plugin mandos-client: "
2190
"Failed to create service browser: %s\n",
1831
fprintf(stderr, "Failed to create service browser: %s\n",
2191
1832
avahi_strerror(avahi_server_errno(mc.server)));
2192
1833
exitcode = EX_UNAVAILABLE;
2193
1834
goto end;
2200
1841
/* Run the main loop */
2201
1842
2202
1843
if(debug){
2203
fprintf(stderr, "Mandos plugin mandos-client: "
2204
"Starting Avahi loop search\n");
1844
fprintf(stderr, "Starting Avahi loop search\n");
2205
1845
}
2206
1846
2207
ret = avahi_loop_with_timeout(mc.simple_poll,
2208
(int)(retry_interval * 1000));
1847
ret = avahi_loop_with_timeout(mc.simple_poll, (int)(retry_interval * 1000));
2209
1848
if(debug){
2210
fprintf(stderr, "Mandos plugin mandos-client: "
2211
"avahi_loop_with_timeout exited %s\n",
1849
fprintf(stderr, "avahi_loop_with_timeout exited %s\n",
2212
1850
(ret == 0) ? "successfully" : "with error");
2213
1851
}
2214
1852
2215
1853
end:
2216
1854
2217
1855
if(debug){
2218
fprintf(stderr, "Mandos plugin mandos-client: "
2219
"%s exiting\n", argv[0]);
1856
fprintf(stderr, "%s exiting\n", argv[0]);
2220
1857
}
2221
1858
2222
1859
/* Cleanup things */
2239
1876
gpgme_release(mc.ctx);
2240
1877
}
2241
1878
2242
/* Cleans up the circular linked list of Mandos servers the client
2243
has seen */
1879
/* cleans up the circular linked list of mandos servers the client has seen */
2244
1880
if(mc.current_server != NULL){
2245
1881
mc.current_server->prev->next = NULL;
2246
1882
while(mc.current_server != NULL){
2250
1886
}
2251
1887
}
2252
1888
2253
/* Re-raise priviliges */
2254
{
1889
/* Take down the network interface */
1890
if(take_down_interface){
1891
/* Re-raise priviliges */
2255
1892
errno = 0;
2256
1893
ret = seteuid(0);
2257
1894
if(ret == -1){
2258
1895
perror_plus("seteuid");
2259
1896
}
2260
/* Run network hooks */
2261
if(not run_network_hooks("stop", interface, delay)){
2262
goto end;
2263
}
2264
2265
/* Take down the network interface */
2266
if(take_down_interface and geteuid() == 0){
1897
if(geteuid() == 0){
2267
1898
ret = ioctl(sd, SIOCGIFFLAGS, &network);
2268
1899
if(ret == -1){
2269
1900
perror_plus("ioctl SIOCGIFFLAGS");
2270
} else if(network.ifr_flags & IFF_UP){
1901
} else if(network.ifr_flags & IFF_UP) {
2271
1902
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
2272
1903
ret = ioctl(sd, SIOCSIFFLAGS, &network);
2273
1904
if(ret == -1){
2278
1909
if(ret == -1){
2279
1910
perror_plus("close");
2280
1911
}
1912
/* Lower privileges permanently */
1913
errno = 0;
1914
ret = setuid(uid);
1915
if(ret == -1){
1916
perror_plus("setuid");
1917
}
2281
1918
}
2282
1919
}
2283
/* Lower privileges permanently */
2284
errno = 0;
2285
ret = setuid(uid);
2286
if(ret == -1){
2287
perror_plus("setuid");
2288
}
2289
1920
2290
1921
/* Removes the GPGME temp directory and all files inside */
2291
1922
if(tempdir_created){
2292
1923
struct dirent **direntries = NULL;
2293
1924
struct dirent *direntry = NULL;
2294
int numentries = scandir(tempdir, &direntries, notdotentries,
2295
alphasort);
2296
if (numentries > 0){
2297
for(int i = 0; i < numentries; i++){
1925
ret = scandir(tempdir, &direntries, notdotentries, alphasort);
1926
if (ret > 0){
1927
for(int i = 0; i < ret; i++){
2298
1928
direntry = direntries[i];
2299
1929
char *fullname = NULL;
2300
1930
ret = asprintf(&fullname, "%s/%s", tempdir,
2305
1935
}
2306
1936
ret = remove(fullname);
2307
1937
if(ret == -1){
2308
fprintf(stderr, "Mandos plugin mandos-client: "
2309
"remove(\"%s\"): %s\n", fullname, strerror(errno));
1938
fprintf(stderr, "remove(\"%s\"): %s\n", fullname,
1939
strerror(errno));
2310
1940
}
2311
1941
free(fullname);
2312
1942
}
2313
1943
}
2314
1944
2315
/* need to clean even if 0 because man page doesn't specify */
1945
/* need to be cleaned even if ret == 0 because man page dont specify */
2316
1946
free(direntries);
2317
if (numentries == -1){
1947
if (ret == -1){
2318
1948
perror_plus("scandir");
2319
1949
}
2320
1950
ret = rmdir(tempdir);
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0