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- Committer: Teddy Hogeborn
- Date: 2011-07-13 02:24:39 UTC
- mfrom: (24.1.174 mandos)
- Revision ID: teddy@fukt.bsnet.se-20110713022439-wbv6kghshdsc2x24
Merge from Björn.
- files removed:
- debian/source/local-options
- network-hooks.d
- 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() */
73
73
*/
74
74
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
75
75
getuid(), getgid(), seteuid(),
76
setgid(), pause(), _exit() */
76
setgid(), pause() */
77
77
#include <arpa/inet.h> /* inet_pton(), htons, inet_ntop() */
78
78
#include <iso646.h> /* not, or, and */
79
79
#include <argp.h> /* struct argp_option, error_t, struct
85
85
raise() */
86
86
#include <sysexits.h> /* EX_OSERR, EX_USAGE, EX_UNAVAILABLE,
87
87
EX_NOHOST, EX_IOERR, EX_PROTOCOL */
88
#include <sys/wait.h> /* waitpid(), WIFEXITED(),
89
WEXITSTATUS(), WTERMSIG() */
90
#include <grp.h> /* setgroups() */
91
88
92
89
#ifdef __linux__
93
90
#include <sys/klog.h> /* klogctl() */
111
108
init_gnutls_session(),
112
109
GNUTLS_* */
113
110
#include <gnutls/openpgp.h>
114
/* gnutls_certificate_set_openpgp_key_file(),
115
GNUTLS_OPENPGP_FMT_BASE64 */
111
/* gnutls_certificate_set_openpgp_key_file(),
112
GNUTLS_OPENPGP_FMT_BASE64 */
116
113
117
114
/* GPGME */
118
115
#include <gpgme.h> /* All GPGME types, constants and
126
123
#define PATHDIR "/conf/conf.d/mandos"
127
124
#define SECKEY "seckey.txt"
128
125
#define PUBKEY "pubkey.txt"
129
#define HOOKDIR "/lib/mandos/network-hooks.d"
130
126
131
127
bool debug = false;
132
128
static const char mandos_protocol_version[] = "1";
133
129
const char *argp_program_version = "mandos-client " VERSION;
134
const char *argp_program_bug_address = "<mandos@recompile.se>";
130
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
135
131
static const char sys_class_net[] = "/sys/class/net";
136
132
char *connect_to = NULL;
137
const char *hookdir = HOOKDIR;
138
133
139
134
/* Doubly linked list that need to be circularly linked when used */
140
135
typedef struct server{
175
170
perror(print_text);
176
171
}
177
172
178
int fprintf_plus(FILE *stream, const char *format, ...){
179
va_list ap;
180
va_start (ap, format);
181
182
TEMP_FAILURE_RETRY(fprintf(stream, "Mandos plugin %s: ",
183
program_invocation_short_name));
184
return TEMP_FAILURE_RETRY(vfprintf(stream, format, ap));
185
}
186
187
173
/*
188
174
* Make additional room in "buffer" for at least BUFFER_SIZE more
189
175
* bytes. "buffer_capacity" is how much is currently allocated,
190
176
* "buffer_length" is how much is already used.
191
177
*/
192
178
size_t incbuffer(char **buffer, size_t buffer_length,
193
size_t buffer_capacity){
179
size_t buffer_capacity){
194
180
if(buffer_length + BUFFER_SIZE > buffer_capacity){
195
181
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
196
182
if(buffer == NULL){
201
187
return buffer_capacity;
202
188
}
203
189
204
/* Add server to set of servers to retry periodically */
205
int add_server(const char *ip, uint16_t port, AvahiIfIndex if_index,
206
int af){
190
int add_server(const char *ip, uint16_t port,
191
AvahiIfIndex if_index,
192
int af){
207
193
int ret;
208
194
server *new_server = malloc(sizeof(server));
209
195
if(new_server == NULL){
211
197
return -1;
212
198
}
213
199
*new_server = (server){ .ip = strdup(ip),
214
.port = port,
215
.if_index = if_index,
216
.af = af };
200
.port = port,
201
.if_index = if_index,
202
.af = af };
217
203
if(new_server->ip == NULL){
218
204
perror_plus("strdup");
219
205
return -1;
220
206
}
221
/* Special case of first server */
207
/* unique case of first server */
222
208
if (mc.current_server == NULL){
223
209
new_server->next = new_server;
224
210
new_server->prev = new_server;
225
211
mc.current_server = new_server;
226
/* Place the new server last in the list */
212
/* Placing the new server last in the list */
227
213
} else {
228
214
new_server->next = mc.current_server;
229
215
new_server->prev = mc.current_server->prev;
241
227
/*
242
228
* Initialize GPGME.
243
229
*/
244
static bool init_gpgme(const char *seckey, const char *pubkey,
245
const char *tempdir){
230
static bool init_gpgme(const char *seckey,
231
const char *pubkey, const char *tempdir){
246
232
gpgme_error_t rc;
247
233
gpgme_engine_info_t engine_info;
248
234
263
249
264
250
rc = gpgme_data_new_from_fd(&pgp_data, fd);
265
251
if(rc != GPG_ERR_NO_ERROR){
266
fprintf_plus(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
267
gpgme_strsource(rc), gpgme_strerror(rc));
252
fprintf(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
253
gpgme_strsource(rc), gpgme_strerror(rc));
268
254
return false;
269
255
}
270
256
271
257
rc = gpgme_op_import(mc.ctx, pgp_data);
272
258
if(rc != GPG_ERR_NO_ERROR){
273
fprintf_plus(stderr, "bad gpgme_op_import: %s: %s\n",
274
gpgme_strsource(rc), gpgme_strerror(rc));
259
fprintf(stderr, "bad gpgme_op_import: %s: %s\n",
260
gpgme_strsource(rc), gpgme_strerror(rc));
275
261
return false;
276
262
}
277
263
284
270
}
285
271
286
272
if(debug){
287
fprintf_plus(stderr, "Initializing GPGME\n");
273
fprintf(stderr, "Initializing GPGME\n");
288
274
}
289
275
290
276
/* Init GPGME */
291
277
gpgme_check_version(NULL);
292
278
rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
293
279
if(rc != GPG_ERR_NO_ERROR){
294
fprintf_plus(stderr, "bad gpgme_engine_check_version: %s: %s\n",
295
gpgme_strsource(rc), gpgme_strerror(rc));
280
fprintf(stderr, "bad gpgme_engine_check_version: %s: %s\n",
281
gpgme_strsource(rc), gpgme_strerror(rc));
296
282
return false;
297
283
}
298
284
299
/* Set GPGME home directory for the OpenPGP engine only */
285
/* Set GPGME home directory for the OpenPGP engine only */
300
286
rc = gpgme_get_engine_info(&engine_info);
301
287
if(rc != GPG_ERR_NO_ERROR){
302
fprintf_plus(stderr, "bad gpgme_get_engine_info: %s: %s\n",
303
gpgme_strsource(rc), gpgme_strerror(rc));
288
fprintf(stderr, "bad gpgme_get_engine_info: %s: %s\n",
289
gpgme_strsource(rc), gpgme_strerror(rc));
304
290
return false;
305
291
}
306
292
while(engine_info != NULL){
312
298
engine_info = engine_info->next;
313
299
}
314
300
if(engine_info == NULL){
315
fprintf_plus(stderr, "Could not set GPGME home dir to %s\n",
316
tempdir);
301
fprintf(stderr, "Could not set GPGME home dir to %s\n", tempdir);
317
302
return false;
318
303
}
319
304
320
305
/* Create new GPGME "context" */
321
306
rc = gpgme_new(&(mc.ctx));
322
307
if(rc != GPG_ERR_NO_ERROR){
323
fprintf_plus(stderr, "Mandos plugin mandos-client: "
324
"bad gpgme_new: %s: %s\n", gpgme_strsource(rc),
325
gpgme_strerror(rc));
308
fprintf(stderr, "bad gpgme_new: %s: %s\n",
309
gpgme_strsource(rc), gpgme_strerror(rc));
326
310
return false;
327
311
}
328
312
347
331
ssize_t plaintext_length = 0;
348
332
349
333
if(debug){
350
fprintf_plus(stderr, "Trying to decrypt OpenPGP data\n");
334
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
351
335
}
352
336
353
337
/* Create new GPGME data buffer from memory cryptotext */
354
338
rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,
355
339
0);
356
340
if(rc != GPG_ERR_NO_ERROR){
357
fprintf_plus(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
358
gpgme_strsource(rc), gpgme_strerror(rc));
341
fprintf(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
342
gpgme_strsource(rc), gpgme_strerror(rc));
359
343
return -1;
360
344
}
361
345
362
346
/* Create new empty GPGME data buffer for the plaintext */
363
347
rc = gpgme_data_new(&dh_plain);
364
348
if(rc != GPG_ERR_NO_ERROR){
365
fprintf_plus(stderr, "Mandos plugin mandos-client: "
366
"bad gpgme_data_new: %s: %s\n",
367
gpgme_strsource(rc), gpgme_strerror(rc));
349
fprintf(stderr, "bad gpgme_data_new: %s: %s\n",
350
gpgme_strsource(rc), gpgme_strerror(rc));
368
351
gpgme_data_release(dh_crypto);
369
352
return -1;
370
353
}
373
356
data buffer */
374
357
rc = gpgme_op_decrypt(mc.ctx, dh_crypto, dh_plain);
375
358
if(rc != GPG_ERR_NO_ERROR){
376
fprintf_plus(stderr, "bad gpgme_op_decrypt: %s: %s\n",
377
gpgme_strsource(rc), gpgme_strerror(rc));
359
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
360
gpgme_strsource(rc), gpgme_strerror(rc));
378
361
plaintext_length = -1;
379
362
if(debug){
380
363
gpgme_decrypt_result_t result;
381
364
result = gpgme_op_decrypt_result(mc.ctx);
382
365
if(result == NULL){
383
fprintf_plus(stderr, "gpgme_op_decrypt_result failed\n");
366
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
384
367
} else {
385
fprintf_plus(stderr, "Unsupported algorithm: %s\n",
386
result->unsupported_algorithm);
387
fprintf_plus(stderr, "Wrong key usage: %u\n",
388
result->wrong_key_usage);
368
fprintf(stderr, "Unsupported algorithm: %s\n",
369
result->unsupported_algorithm);
370
fprintf(stderr, "Wrong key usage: %u\n",
371
result->wrong_key_usage);
389
372
if(result->file_name != NULL){
390
fprintf_plus(stderr, "File name: %s\n", result->file_name);
373
fprintf(stderr, "File name: %s\n", result->file_name);
391
374
}
392
375
gpgme_recipient_t recipient;
393
376
recipient = result->recipients;
394
377
while(recipient != NULL){
395
fprintf_plus(stderr, "Public key algorithm: %s\n",
396
gpgme_pubkey_algo_name
397
(recipient->pubkey_algo));
398
fprintf_plus(stderr, "Key ID: %s\n", recipient->keyid);
399
fprintf_plus(stderr, "Secret key available: %s\n",
400
recipient->status == GPG_ERR_NO_SECKEY
401
? "No" : "Yes");
378
fprintf(stderr, "Public key algorithm: %s\n",
379
gpgme_pubkey_algo_name(recipient->pubkey_algo));
380
fprintf(stderr, "Key ID: %s\n", recipient->keyid);
381
fprintf(stderr, "Secret key available: %s\n",
382
recipient->status == GPG_ERR_NO_SECKEY
383
? "No" : "Yes");
402
384
recipient = recipient->next;
403
385
}
404
386
}
407
389
}
408
390
409
391
if(debug){
410
fprintf_plus(stderr, "Decryption of OpenPGP data succeeded\n");
392
fprintf(stderr, "Decryption of OpenPGP data succeeded\n");
411
393
}
412
394
413
395
/* Seek back to the beginning of the GPGME plaintext data buffer */
420
402
*plaintext = NULL;
421
403
while(true){
422
404
plaintext_capacity = incbuffer(plaintext,
423
(size_t)plaintext_length,
424
plaintext_capacity);
405
(size_t)plaintext_length,
406
plaintext_capacity);
425
407
if(plaintext_capacity == 0){
426
perror_plus("incbuffer");
427
plaintext_length = -1;
428
goto decrypt_end;
408
perror_plus("incbuffer");
409
plaintext_length = -1;
410
goto decrypt_end;
429
411
}
430
412
431
413
ret = gpgme_data_read(dh_plain, *plaintext + plaintext_length,
444
426
}
445
427
446
428
if(debug){
447
fprintf_plus(stderr, "Decrypted password is: ");
429
fprintf(stderr, "Decrypted password is: ");
448
430
for(ssize_t i = 0; i < plaintext_length; i++){
449
431
fprintf(stderr, "%02hhX ", (*plaintext)[i]);
450
432
}
472
454
/* GnuTLS log function callback */
473
455
static void debuggnutls(__attribute__((unused)) int level,
474
456
const char* string){
475
fprintf_plus(stderr, "GnuTLS: %s", string);
457
fprintf(stderr, "GnuTLS: %s", string);
476
458
}
477
459
478
460
static int init_gnutls_global(const char *pubkeyfilename,
480
462
int ret;
481
463
482
464
if(debug){
483
fprintf_plus(stderr, "Initializing GnuTLS\n");
465
fprintf(stderr, "Initializing GnuTLS\n");
484
466
}
485
467
486
468
ret = gnutls_global_init();
487
469
if(ret != GNUTLS_E_SUCCESS){
488
fprintf_plus(stderr, "GnuTLS global_init: %s\n",
489
safer_gnutls_strerror(ret));
470
fprintf(stderr, "GnuTLS global_init: %s\n",
471
safer_gnutls_strerror(ret));
490
472
return -1;
491
473
}
492
474
501
483
/* OpenPGP credentials */
502
484
ret = gnutls_certificate_allocate_credentials(&mc.cred);
503
485
if(ret != GNUTLS_E_SUCCESS){
504
fprintf_plus(stderr, "GnuTLS memory error: %s\n",
505
safer_gnutls_strerror(ret));
486
fprintf(stderr, "GnuTLS memory error: %s\n",
487
safer_gnutls_strerror(ret));
506
488
gnutls_global_deinit();
507
489
return -1;
508
490
}
509
491
510
492
if(debug){
511
fprintf_plus(stderr, "Attempting to use OpenPGP public key %s and"
512
" secret key %s as GnuTLS credentials\n",
513
pubkeyfilename,
514
seckeyfilename);
493
fprintf(stderr, "Attempting to use OpenPGP public key %s and"
494
" secret key %s as GnuTLS credentials\n", pubkeyfilename,
495
seckeyfilename);
515
496
}
516
497
517
498
ret = gnutls_certificate_set_openpgp_key_file
518
499
(mc.cred, pubkeyfilename, seckeyfilename,
519
500
GNUTLS_OPENPGP_FMT_BASE64);
520
501
if(ret != GNUTLS_E_SUCCESS){
521
fprintf_plus(stderr,
522
"Error[%d] while reading the OpenPGP key pair ('%s',"
523
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
524
fprintf_plus(stderr, "The GnuTLS error is: %s\n",
525
safer_gnutls_strerror(ret));
502
fprintf(stderr,
503
"Error[%d] while reading the OpenPGP key pair ('%s',"
504
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
505
fprintf(stderr, "The GnuTLS error is: %s\n",
506
safer_gnutls_strerror(ret));
526
507
goto globalfail;
527
508
}
528
509
529
510
/* GnuTLS server initialization */
530
511
ret = gnutls_dh_params_init(&mc.dh_params);
531
512
if(ret != GNUTLS_E_SUCCESS){
532
fprintf_plus(stderr, "Error in GnuTLS DH parameter"
533
" initialization: %s\n",
534
safer_gnutls_strerror(ret));
513
fprintf(stderr, "Error in GnuTLS DH parameter initialization:"
514
" %s\n", safer_gnutls_strerror(ret));
535
515
goto globalfail;
536
516
}
537
517
ret = gnutls_dh_params_generate2(mc.dh_params, mc.dh_bits);
538
518
if(ret != GNUTLS_E_SUCCESS){
539
fprintf_plus(stderr, "Error in GnuTLS prime generation: %s\n",
540
safer_gnutls_strerror(ret));
519
fprintf(stderr, "Error in GnuTLS prime generation: %s\n",
520
safer_gnutls_strerror(ret));
541
521
goto globalfail;
542
522
}
543
523
563
543
}
564
544
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
565
545
if(ret != GNUTLS_E_SUCCESS){
566
fprintf_plus(stderr,
567
"Error in GnuTLS session initialization: %s\n",
568
safer_gnutls_strerror(ret));
546
fprintf(stderr, "Error in GnuTLS session initialization: %s\n",
547
safer_gnutls_strerror(ret));
569
548
}
570
549
571
550
{
578
557
}
579
558
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
580
559
if(ret != GNUTLS_E_SUCCESS){
581
fprintf_plus(stderr, "Syntax error at: %s\n", err);
582
fprintf_plus(stderr, "GnuTLS error: %s\n",
583
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));
584
563
gnutls_deinit(*session);
585
564
return -1;
586
565
}
595
574
}
596
575
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
597
576
if(ret != GNUTLS_E_SUCCESS){
598
fprintf_plus(stderr, "Error setting GnuTLS credentials: %s\n",
599
safer_gnutls_strerror(ret));
577
fprintf(stderr, "Error setting GnuTLS credentials: %s\n",
578
safer_gnutls_strerror(ret));
600
579
gnutls_deinit(*session);
601
580
return -1;
602
581
}
647
626
pf = PF_INET;
648
627
break;
649
628
default:
650
fprintf_plus(stderr, "Bad address family: %d\n", af);
629
fprintf(stderr, "Bad address family: %d\n", af);
651
630
errno = EINVAL;
652
631
return -1;
653
632
}
658
637
}
659
638
660
639
if(debug){
661
fprintf_plus(stderr, "Setting up a TCP connection to %s, port %"
662
PRIu16 "\n", ip, port);
640
fprintf(stderr, "Setting up a TCP connection to %s, port %" PRIu16
641
"\n", ip, port);
663
642
}
664
643
665
644
tcp_sd = socket(pf, SOCK_STREAM, 0);
691
670
}
692
671
if(ret == 0){
693
672
int e = errno;
694
fprintf_plus(stderr, "Bad address: %s\n", ip);
673
fprintf(stderr, "Bad address: %s\n", ip);
695
674
errno = e;
696
675
goto mandos_end;
697
676
}
702
681
703
682
if(IN6_IS_ADDR_LINKLOCAL /* Spurious warnings from */
704
683
(&to.in6.sin6_addr)){ /* -Wstrict-aliasing=2 or lower and
705
-Wunreachable-code*/
684
-Wunreachable-code*/
706
685
if(if_index == AVAHI_IF_UNSPEC){
707
fprintf_plus(stderr, "An IPv6 link-local address is"
708
" incomplete without a network interface\n");
686
fprintf(stderr, "An IPv6 link-local address is incomplete"
687
" without a network interface\n");
709
688
errno = EINVAL;
710
689
goto mandos_end;
711
690
}
729
708
if(if_indextoname((unsigned int)if_index, interface) == NULL){
730
709
perror_plus("if_indextoname");
731
710
} else {
732
fprintf_plus(stderr, "Connection to: %s%%%s, port %" PRIu16
733
"\n", ip, interface, port);
711
fprintf(stderr, "Connection to: %s%%%s, port %" PRIu16 "\n",
712
ip, interface, port);
734
713
}
735
714
} else {
736
fprintf_plus(stderr, "Connection to: %s, port %" PRIu16 "\n",
737
ip, port);
715
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
716
port);
738
717
}
739
718
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
740
719
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
750
729
perror_plus("inet_ntop");
751
730
} else {
752
731
if(strcmp(addrstr, ip) != 0){
753
fprintf_plus(stderr, "Canonical address form: %s\n", addrstr);
732
fprintf(stderr, "Canonical address form: %s\n", addrstr);
754
733
}
755
734
}
756
735
}
784
763
while(true){
785
764
size_t out_size = strlen(out);
786
765
ret = (int)TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
787
out_size - written));
766
out_size - written));
788
767
if(ret == -1){
789
768
int e = errno;
790
769
perror_plus("write");
810
789
}
811
790
812
791
if(debug){
813
fprintf_plus(stderr, "Establishing TLS session with %s\n", ip);
792
fprintf(stderr, "Establishing TLS session with %s\n", ip);
814
793
}
815
794
816
795
if(quit_now){
836
815
837
816
if(ret != GNUTLS_E_SUCCESS){
838
817
if(debug){
839
fprintf_plus(stderr, "*** GnuTLS Handshake failed ***\n");
818
fprintf(stderr, "*** GnuTLS Handshake failed ***\n");
840
819
gnutls_perror(ret);
841
820
}
842
821
errno = EPROTO;
846
825
/* Read OpenPGP packet that contains the wanted password */
847
826
848
827
if(debug){
849
fprintf_plus(stderr, "Retrieving OpenPGP encrypted password from"
850
" %s\n", ip);
828
fprintf(stderr, "Retrieving OpenPGP encrypted password from %s\n",
829
ip);
851
830
}
852
831
853
832
while(true){
858
837
}
859
838
860
839
buffer_capacity = incbuffer(&buffer, buffer_length,
861
buffer_capacity);
840
buffer_capacity);
862
841
if(buffer_capacity == 0){
863
842
int e = errno;
864
843
perror_plus("incbuffer");
891
870
}
892
871
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
893
872
if(ret < 0){
894
fprintf_plus(stderr, "*** GnuTLS Re-handshake failed "
895
"***\n");
873
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
896
874
gnutls_perror(ret);
897
875
errno = EPROTO;
898
876
goto mandos_end;
899
877
}
900
878
break;
901
879
default:
902
fprintf_plus(stderr, "Unknown error while reading data from"
903
" encrypted session with Mandos server\n");
880
fprintf(stderr, "Unknown error while reading data from"
881
" encrypted session with Mandos server\n");
904
882
gnutls_bye(session, GNUTLS_SHUT_RDWR);
905
883
errno = EIO;
906
884
goto mandos_end;
911
889
}
912
890
913
891
if(debug){
914
fprintf_plus(stderr, "Closing TLS session\n");
892
fprintf(stderr, "Closing TLS session\n");
915
893
}
916
894
917
895
if(quit_now){
929
907
930
908
if(buffer_length > 0){
931
909
ssize_t decrypted_buffer_size;
932
decrypted_buffer_size = pgp_packet_decrypt(buffer, buffer_length,
910
decrypted_buffer_size = pgp_packet_decrypt(buffer,
911
buffer_length,
933
912
&decrypted_buffer);
934
913
if(decrypted_buffer_size >= 0){
935
914
946
925
if(ret == 0 and ferror(stdout)){
947
926
int e = errno;
948
927
if(debug){
949
fprintf_plus(stderr, "Error writing encrypted data: %s\n",
950
strerror(errno));
928
fprintf(stderr, "Error writing encrypted data: %s\n",
929
strerror(errno));
951
930
}
952
931
errno = e;
953
932
goto mandos_end;
1010
989
switch(event){
1011
990
default:
1012
991
case AVAHI_RESOLVER_FAILURE:
1013
fprintf_plus(stderr, "(Avahi Resolver) Failed to resolve service "
1014
"'%s' of type '%s' in domain '%s': %s\n", name, type,
1015
domain,
1016
avahi_strerror(avahi_server_errno(mc.server)));
992
fprintf(stderr, "(Avahi Resolver) Failed to resolve service '%s'"
993
" of type '%s' in domain '%s': %s\n", name, type, domain,
994
avahi_strerror(avahi_server_errno(mc.server)));
1017
995
break;
1018
996
1019
997
case AVAHI_RESOLVER_FOUND:
1021
999
char ip[AVAHI_ADDRESS_STR_MAX];
1022
1000
avahi_address_snprint(ip, sizeof(ip), address);
1023
1001
if(debug){
1024
fprintf_plus(stderr, "Mandos server \"%s\" found on %s (%s, %"
1025
PRIdMAX ") on port %" PRIu16 "\n", name,
1026
host_name, ip, (intmax_t)interface, port);
1002
fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %"
1003
PRIdMAX ") on port %" PRIu16 "\n", name, host_name,
1004
ip, (intmax_t)interface, port);
1027
1005
}
1028
1006
int ret = start_mandos_communication(ip, port, interface,
1029
1007
avahi_proto_to_af(proto));
1061
1039
default:
1062
1040
case AVAHI_BROWSER_FAILURE:
1063
1041
1064
fprintf_plus(stderr, "(Avahi browser) %s\n",
1065
avahi_strerror(avahi_server_errno(mc.server)));
1042
fprintf(stderr, "(Avahi browser) %s\n",
1043
avahi_strerror(avahi_server_errno(mc.server)));
1066
1044
avahi_simple_poll_quit(mc.simple_poll);
1067
1045
return;
1068
1046
1075
1053
if(avahi_s_service_resolver_new(mc.server, interface, protocol,
1076
1054
name, type, domain, protocol, 0,
1077
1055
resolve_callback, NULL) == NULL)
1078
fprintf_plus(stderr, "Avahi: Failed to resolve service '%s':"
1079
" %s\n", name,
1080
avahi_strerror(avahi_server_errno(mc.server)));
1056
fprintf(stderr, "Avahi: Failed to resolve service '%s': %s\n",
1057
name, avahi_strerror(avahi_server_errno(mc.server)));
1081
1058
break;
1082
1059
1083
1060
case AVAHI_BROWSER_REMOVE:
1086
1063
case AVAHI_BROWSER_ALL_FOR_NOW:
1087
1064
case AVAHI_BROWSER_CACHE_EXHAUSTED:
1088
1065
if(debug){
1089
fprintf_plus(stderr, "No Mandos server found, still"
1090
" searching...\n");
1066
fprintf(stderr, "No Mandos server found, still searching...\n");
1091
1067
}
1092
1068
break;
1093
1069
}
1108
1084
errno = old_errno;
1109
1085
}
1110
1086
1111
bool get_flags(const char *ifname, struct ifreq *ifr){
1112
int ret;
1113
1114
int s = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1115
if(s < 0){
1116
perror_plus("socket");
1117
return false;
1118
}
1119
strcpy(ifr->ifr_name, ifname);
1120
ret = ioctl(s, SIOCGIFFLAGS, ifr);
1121
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 = 2+(sizeof(ifreq_flags)*2)+1; /* "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){
1122
1143
if(debug){
1123
perror_plus("ioctl SIOCGIFFLAGS");
1144
fprintf(stderr, "Invalid flags \"%s\" for interface \"%s\"\n",
1145
flagstring, if_entry->d_name);
1124
1146
}
1125
return false;
1147
free(flagstring);
1148
return 0;
1126
1149
}
1127
return true;
1128
}
1129
1130
bool good_flags(const char *ifname, const struct ifreq *ifr){
1131
1150
free(flagstring);
1151
ifreq_flags flags = (ifreq_flags)tmpmax;
1132
1152
/* Reject the loopback device */
1133
if(ifr->ifr_flags & IFF_LOOPBACK){
1153
if(flags & IFF_LOOPBACK){
1134
1154
if(debug){
1135
fprintf_plus(stderr, "Rejecting loopback interface \"%s\"\n",
1136
ifname);
1155
fprintf(stderr, "Rejecting loopback interface \"%s\"\n",
1156
if_entry->d_name);
1137
1157
}
1138
return false;
1158
return 0;
1139
1159
}
1140
1160
/* Accept point-to-point devices only if connect_to is specified */
1141
if(connect_to != NULL and (ifr->ifr_flags & IFF_POINTOPOINT)){
1161
if(connect_to != NULL and (flags & IFF_POINTOPOINT)){
1142
1162
if(debug){
1143
fprintf_plus(stderr, "Accepting point-to-point interface"
1144
" \"%s\"\n", ifname);
1163
fprintf(stderr, "Accepting point-to-point interface \"%s\"\n",
1164
if_entry->d_name);
1145
1165
}
1146
return true;
1166
return 1;
1147
1167
}
1148
1168
/* Otherwise, reject non-broadcast-capable devices */
1149
if(not (ifr->ifr_flags & IFF_BROADCAST)){
1169
if(not (flags & IFF_BROADCAST)){
1150
1170
if(debug){
1151
fprintf_plus(stderr, "Rejecting non-broadcast interface"
1152
" \"%s\"\n", ifname);
1171
fprintf(stderr, "Rejecting non-broadcast interface \"%s\"\n",
1172
if_entry->d_name);
1153
1173
}
1154
return false;
1174
return 0;
1155
1175
}
1156
1176
/* Reject non-ARP interfaces (including dummy interfaces) */
1157
if(ifr->ifr_flags & IFF_NOARP){
1177
if(flags & IFF_NOARP){
1158
1178
if(debug){
1159
fprintf_plus(stderr, "Rejecting non-ARP interface \"%s\"\n",
1160
ifname);
1179
fprintf(stderr, "Rejecting non-ARP interface \"%s\"\n",
1180
if_entry->d_name);
1161
1181
}
1162
return false;
1182
return 0;
1163
1183
}
1164
1165
1184
/* Accept this device */
1166
1185
if(debug){
1167
fprintf_plus(stderr, "Interface \"%s\" is good\n", ifname);
1168
}
1169
return true;
1170
}
1171
1172
/*
1173
* This function determines if a directory entry in /sys/class/net
1174
* corresponds to an acceptable network device.
1175
* (This function is passed to scandir(3) as a filter function.)
1176
*/
1177
int good_interface(const struct dirent *if_entry){
1178
if(if_entry->d_name[0] == '.'){
1179
return 0;
1180
}
1181
1182
struct ifreq ifr;
1183
if(not get_flags(if_entry->d_name, &ifr)){
1184
if(debug){
1185
fprintf_plus(stderr, "Failed to get flags for interface "
1186
"\"%s\"\n", if_entry->d_name);
1187
}
1188
return 0;
1189
}
1190
1191
if(not good_flags(if_entry->d_name, &ifr)){
1192
return 0;
1193
}
1194
return 1;
1195
}
1196
1197
/*
1198
* This function determines if a directory entry in /sys/class/net
1199
* corresponds to an acceptable network device which is up.
1200
* (This function is passed to scandir(3) as a filter function.)
1201
*/
1202
int up_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_plus(stderr, "Failed to get flags for interface "
1211
"\"%s\"\n", if_entry->d_name);
1212
}
1213
return 0;
1214
}
1215
1216
/* Reject down interfaces */
1217
if(not (ifr.ifr_flags & IFF_UP)){
1218
if(debug){
1219
fprintf_plus(stderr, "Rejecting down interface \"%s\"\n",
1220
if_entry->d_name);
1221
}
1222
return 0;
1223
}
1224
1225
/* Reject non-running interfaces */
1226
if(not (ifr.ifr_flags & IFF_RUNNING)){
1227
if(debug){
1228
fprintf_plus(stderr, "Rejecting non-running interface \"%s\"\n",
1229
if_entry->d_name);
1230
}
1231
return 0;
1232
}
1233
1234
if(not good_flags(if_entry->d_name, &ifr)){
1235
return 0;
1186
fprintf(stderr, "Interface \"%s\" is acceptable\n",
1187
if_entry->d_name);
1236
1188
}
1237
1189
return 1;
1238
1190
}
1248
1200
return 1;
1249
1201
}
1250
1202
1251
/* Is this directory entry a runnable program? */
1252
int runnable_hook(const struct dirent *direntry){
1253
int ret;
1254
size_t sret;
1255
struct stat st;
1256
1257
if((direntry->d_name)[0] == '\0'){
1258
/* Empty name? */
1259
return 0;
1260
}
1261
1262
sret = strspn(direntry->d_name, "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
1263
"abcdefghijklmnopqrstuvwxyz"
1264
"0123456789"
1265
"_-");
1266
if((direntry->d_name)[sret] != '\0'){
1267
/* Contains non-allowed characters */
1268
if(debug){
1269
fprintf_plus(stderr, "Ignoring hook \"%s\" with bad name\n",
1270
direntry->d_name);
1271
}
1272
return 0;
1273
}
1274
1275
char *fullname = NULL;
1276
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1277
if(ret < 0){
1278
perror_plus("asprintf");
1279
return 0;
1280
}
1281
1282
ret = stat(fullname, &st);
1283
if(ret == -1){
1284
if(debug){
1285
perror_plus("Could not stat hook");
1286
}
1287
return 0;
1288
}
1289
if(not (S_ISREG(st.st_mode))){
1290
/* Not a regular file */
1291
if(debug){
1292
fprintf_plus(stderr, "Ignoring hook \"%s\" - not a file\n",
1293
direntry->d_name);
1294
}
1295
return 0;
1296
}
1297
if(not (st.st_mode & (S_IXUSR | S_IXGRP | S_IXOTH))){
1298
/* Not executable */
1299
if(debug){
1300
fprintf_plus(stderr, "Ignoring hook \"%s\" - not executable\n",
1301
direntry->d_name);
1302
}
1303
return 0;
1304
}
1305
if(debug){
1306
fprintf_plus(stderr, "Hook \"%s\" is acceptable\n",
1307
direntry->d_name);
1308
}
1309
return 1;
1310
}
1311
1312
1203
int avahi_loop_with_timeout(AvahiSimplePoll *s, int retry_interval){
1313
1204
int ret;
1314
1205
struct timespec now;
1315
1206
struct timespec waited_time;
1316
1207
intmax_t block_time;
1317
1208
1318
1209
while(true){
1319
1210
if(mc.current_server == NULL){
1320
1211
if (debug){
1321
fprintf_plus(stderr, "Wait until first server is found."
1322
" No timeout!\n");
1212
fprintf(stderr,
1213
"Wait until first server is found. No timeout!\n");
1323
1214
}
1324
1215
ret = avahi_simple_poll_iterate(s, -1);
1325
1216
} else {
1326
1217
if (debug){
1327
fprintf_plus(stderr, "Check current_server if we should run"
1328
" it, or wait\n");
1218
fprintf(stderr, "Check current_server if we should run it,"
1219
" or wait\n");
1329
1220
}
1330
1221
/* the current time */
1331
1222
ret = clock_gettime(CLOCK_MONOTONIC, &now);
1345
1236
block_time = ((retry_interval
1346
1237
- ((intmax_t)waited_time.tv_sec * 1000))
1347
1238
- ((intmax_t)waited_time.tv_nsec / 1000000));
1348
1239
1349
1240
if (debug){
1350
fprintf_plus(stderr, "Blocking for %" PRIdMAX " ms\n",
1351
block_time);
1241
fprintf(stderr, "Blocking for %ld ms\n", block_time);
1352
1242
}
1353
1243
1354
1244
if(block_time <= 0){
1355
1245
ret = start_mandos_communication(mc.current_server->ip,
1356
1246
mc.current_server->port,
1374
1264
ret = avahi_simple_poll_iterate(s, (int)block_time);
1375
1265
}
1376
1266
if(ret != 0){
1377
if (ret > 0 or errno != EINTR){
1267
if (ret > 0 or errno != EINTR) {
1378
1268
return (ret != 1) ? ret : 0;
1379
1269
}
1380
1270
}
1381
1271
}
1382
1272
}
1383
1273
1384
bool run_network_hooks(const char *mode, const char *interface,
1385
const float delay){
1386
struct dirent **direntries;
1387
struct dirent *direntry;
1388
int ret;
1389
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1390
alphasort);
1391
if(numhooks == -1){
1392
perror_plus("scandir");
1393
} else {
1394
int devnull = open("/dev/null", O_RDONLY);
1395
for(int i = 0; i < numhooks; i++){
1396
direntry = direntries[i];
1397
char *fullname = NULL;
1398
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1399
if(ret < 0){
1400
perror_plus("asprintf");
1401
continue;
1402
}
1403
if(debug){
1404
fprintf_plus(stderr, "Running network hook \"%s\"\n",
1405
direntry->d_name);
1406
}
1407
pid_t hook_pid = fork();
1408
if(hook_pid == 0){
1409
/* Child */
1410
/* Raise privileges */
1411
errno = 0;
1412
ret = seteuid(0);
1413
if(ret == -1){
1414
perror_plus("seteuid");
1415
}
1416
/* Raise privileges even more */
1417
errno = 0;
1418
ret = setuid(0);
1419
if(ret == -1){
1420
perror_plus("setuid");
1421
}
1422
/* Set group */
1423
errno = 0;
1424
ret = setgid(0);
1425
if(ret == -1){
1426
perror_plus("setgid");
1427
}
1428
/* Reset supplementary groups */
1429
errno = 0;
1430
ret = setgroups(0, NULL);
1431
if(ret == -1){
1432
perror_plus("setgroups");
1433
}
1434
dup2(devnull, STDIN_FILENO);
1435
close(devnull);
1436
dup2(STDERR_FILENO, STDOUT_FILENO);
1437
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1438
if(ret == -1){
1439
perror_plus("setenv");
1440
_exit(EX_OSERR);
1441
}
1442
ret = setenv("DEVICE", interface, 1);
1443
if(ret == -1){
1444
perror_plus("setenv");
1445
_exit(EX_OSERR);
1446
}
1447
ret = setenv("VERBOSE", debug ? "1" : "0", 1);
1448
if(ret == -1){
1449
perror_plus("setenv");
1450
_exit(EX_OSERR);
1451
}
1452
ret = setenv("MODE", mode, 1);
1453
if(ret == -1){
1454
perror_plus("setenv");
1455
_exit(EX_OSERR);
1456
}
1457
char *delaystring;
1458
ret = asprintf(&delaystring, "%f", delay);
1459
if(ret == -1){
1460
perror_plus("asprintf");
1461
_exit(EX_OSERR);
1462
}
1463
ret = setenv("DELAY", delaystring, 1);
1464
if(ret == -1){
1465
free(delaystring);
1466
perror_plus("setenv");
1467
_exit(EX_OSERR);
1468
}
1469
free(delaystring);
1470
ret = execl(fullname, direntry->d_name, mode, NULL);
1471
perror_plus("execl");
1472
} else {
1473
int status;
1474
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
1475
perror_plus("waitpid");
1476
free(fullname);
1477
continue;
1478
}
1479
if(WIFEXITED(status)){
1480
if(WEXITSTATUS(status) != 0){
1481
fprintf_plus(stderr, "Warning: network hook \"%s\" exited"
1482
" with status %d\n", direntry->d_name,
1483
WEXITSTATUS(status));
1484
free(fullname);
1485
continue;
1486
}
1487
} else if(WIFSIGNALED(status)){
1488
fprintf_plus(stderr, "Warning: network hook \"%s\" died by"
1489
" signal %d\n", direntry->d_name,
1490
WTERMSIG(status));
1491
free(fullname);
1492
continue;
1493
} else {
1494
fprintf_plus(stderr, "Warning: network hook \"%s\""
1495
" crashed\n", direntry->d_name);
1496
free(fullname);
1497
continue;
1498
}
1499
}
1500
free(fullname);
1501
if(debug){
1502
fprintf_plus(stderr, "Network hook \"%s\" ran successfully\n",
1503
direntry->d_name);
1504
}
1505
}
1506
close(devnull);
1507
}
1508
return true;
1509
}
1510
1511
1274
int main(int argc, char *argv[]){
1512
1275
AvahiSServiceBrowser *sb = NULL;
1513
1276
int error;
1595
1358
.arg = "SECONDS",
1596
1359
.doc = "Retry interval used when denied by the mandos server",
1597
1360
.group = 2 },
1598
{ .name = "network-hook-dir", .key = 133,
1599
.arg = "DIR",
1600
.doc = "Directory where network hooks are located",
1601
.group = 2 },
1602
1361
/*
1603
1362
* These reproduce what we would get without ARGP_NO_HELP
1604
1363
*/
1652
1411
errno = 0;
1653
1412
retry_interval = strtod(arg, &tmp);
1654
1413
if(errno != 0 or tmp == arg or *tmp != '\0'
1655
or (retry_interval * 1000) > INT_MAX
1656
or retry_interval < 0){
1414
or (retry_interval * 1000) > INT_MAX){
1657
1415
argp_error(state, "Bad retry interval");
1658
1416
}
1659
1417
break;
1660
case 133: /* --network-hook-dir */
1661
hookdir = arg;
1662
break;
1663
1418
/*
1664
1419
* These reproduce what we would get without ARGP_NO_HELP
1665
1420
*/
1671
1426
argp_state_help(state, state->out_stream,
1672
1427
ARGP_HELP_USAGE | ARGP_HELP_EXIT_ERR);
1673
1428
case 'V': /* --version */
1674
fprintf_plus(state->out_stream,
1675
"Mandos plugin mandos-client: ");
1676
fprintf_plus(state->out_stream, "%s\n", argp_program_version);
1429
fprintf(state->out_stream, "%s\n", argp_program_version);
1677
1430
exit(argp_err_exit_status);
1678
1431
break;
1679
1432
default:
1702
1455
goto end;
1703
1456
}
1704
1457
}
1705
1706
{
1707
/* Work around Debian bug #633582:
1708
<http://bugs.debian.org/633582> */
1709
1710
/* Re-raise priviliges */
1711
errno = 0;
1712
ret = seteuid(0);
1713
if(ret == -1){
1714
perror_plus("seteuid");
1715
} else {
1716
struct stat st;
1717
1718
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
1719
int seckey_fd = open(seckey, O_RDONLY);
1720
if(seckey_fd == -1){
1721
perror_plus("open");
1722
} else {
1723
ret = (int)TEMP_FAILURE_RETRY(fstat(seckey_fd, &st));
1724
if(ret == -1){
1725
perror_plus("fstat");
1726
} else {
1727
if(S_ISREG(st.st_mode)
1728
and st.st_uid == 0 and st.st_gid == 0){
1729
ret = fchown(seckey_fd, uid, gid);
1730
if(ret == -1){
1731
perror_plus("fchown");
1732
}
1733
}
1734
}
1735
TEMP_FAILURE_RETRY(close(seckey_fd));
1736
}
1737
}
1738
1739
if(strcmp(pubkey, PATHDIR "/" PUBKEY) == 0){
1740
int pubkey_fd = open(pubkey, O_RDONLY);
1741
if(pubkey_fd == -1){
1742
perror_plus("open");
1743
} else {
1744
ret = (int)TEMP_FAILURE_RETRY(fstat(pubkey_fd, &st));
1745
if(ret == -1){
1746
perror_plus("fstat");
1747
} else {
1748
if(S_ISREG(st.st_mode)
1749
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
1769
/* Run network hooks */
1770
if(not run_network_hooks("start", interface, delay)){
1771
goto end;
1772
}
1773
1458
1774
1459
if(not debug){
1775
1460
avahi_set_log_function(empty_log);
1776
1461
}
1777
1462
1778
1463
if(interface[0] == '\0'){
1779
1464
struct dirent **direntries;
1780
/* First look for interfaces that are up */
1781
ret = scandir(sys_class_net, &direntries, up_interface,
1465
ret = scandir(sys_class_net, &direntries, good_interface,
1782
1466
alphasort);
1783
if(ret == 0){
1784
/* No up interfaces, look for any good interfaces */
1785
free(direntries);
1786
ret = scandir(sys_class_net, &direntries, good_interface,
1787
alphasort);
1788
}
1789
1467
if(ret >= 1){
1790
/* Pick the first interface returned */
1468
/* Pick the first good interface */
1791
1469
interface = strdup(direntries[0]->d_name);
1792
1470
if(debug){
1793
fprintf_plus(stderr, "Using interface \"%s\"\n", interface);
1471
fprintf(stderr, "Using interface \"%s\"\n", interface);
1794
1472
}
1795
1473
if(interface == NULL){
1796
1474
perror_plus("malloc");
1801
1479
free(direntries);
1802
1480
} else {
1803
1481
free(direntries);
1804
fprintf_plus(stderr, "Could not find a network interface\n");
1482
fprintf(stderr, "Could not find a network interface\n");
1805
1483
exitcode = EXIT_FAILURE;
1806
1484
goto end;
1807
1485
}
1813
1491
srand((unsigned int) time(NULL));
1814
1492
mc.simple_poll = avahi_simple_poll_new();
1815
1493
if(mc.simple_poll == NULL){
1816
fprintf_plus(stderr,
1817
"Avahi: Failed to create simple poll object.\n");
1494
fprintf(stderr, "Avahi: Failed to create simple poll object.\n");
1818
1495
exitcode = EX_UNAVAILABLE;
1819
1496
goto end;
1820
1497
}
1886
1563
if(strcmp(interface, "none") != 0){
1887
1564
if_index = (AvahiIfIndex) if_nametoindex(interface);
1888
1565
if(if_index == 0){
1889
fprintf_plus(stderr, "No such interface: \"%s\"\n", interface);
1566
fprintf(stderr, "No such interface: \"%s\"\n", interface);
1890
1567
exitcode = EX_UNAVAILABLE;
1891
1568
goto end;
1892
1569
}
2012
1689
#endif /* __linux__ */
2013
1690
/* Lower privileges */
2014
1691
errno = 0;
2015
/* Lower privileges */
2016
ret = seteuid(uid);
2017
if(ret == -1){
2018
perror_plus("seteuid");
1692
if(take_down_interface){
1693
/* Lower privileges */
1694
ret = seteuid(uid);
1695
if(ret == -1){
1696
perror_plus("seteuid");
1697
}
1698
} else {
1699
/* Lower privileges permanently */
1700
ret = setuid(uid);
1701
if(ret == -1){
1702
perror_plus("setuid");
1703
}
2019
1704
}
2020
1705
}
2021
1706
2025
1710
2026
1711
ret = init_gnutls_global(pubkey, seckey);
2027
1712
if(ret == -1){
2028
fprintf_plus(stderr, "init_gnutls_global failed\n");
1713
fprintf(stderr, "init_gnutls_global failed\n");
2029
1714
exitcode = EX_UNAVAILABLE;
2030
1715
goto end;
2031
1716
} else {
2047
1732
}
2048
1733
2049
1734
if(not init_gpgme(pubkey, seckey, tempdir)){
2050
fprintf_plus(stderr, "init_gpgme failed\n");
1735
fprintf(stderr, "init_gpgme failed\n");
2051
1736
exitcode = EX_UNAVAILABLE;
2052
1737
goto end;
2053
1738
} else {
2063
1748
/* (Mainly meant for debugging) */
2064
1749
char *address = strrchr(connect_to, ':');
2065
1750
if(address == NULL){
2066
fprintf_plus(stderr, "No colon in address\n");
1751
fprintf(stderr, "No colon in address\n");
2067
1752
exitcode = EX_USAGE;
2068
1753
goto end;
2069
1754
}
2077
1762
tmpmax = strtoimax(address+1, &tmp, 10);
2078
1763
if(errno != 0 or tmp == address+1 or *tmp != '\0'
2079
1764
or tmpmax != (uint16_t)tmpmax){
2080
fprintf_plus(stderr, "Bad port number\n");
1765
fprintf(stderr, "Bad port number\n");
2081
1766
exitcode = EX_USAGE;
2082
1767
goto end;
2083
1768
}
2088
1773
2089
1774
port = (uint16_t)tmpmax;
2090
1775
*address = '\0';
1776
address = connect_to;
2091
1777
/* Colon in address indicates IPv6 */
2092
1778
int af;
2093
if(strchr(connect_to, ':') != NULL){
1779
if(strchr(address, ':') != NULL){
2094
1780
af = AF_INET6;
2095
/* Accept [] around IPv6 address - see RFC 5952 */
2096
if(connect_to[0] == '[' and address[-1] == ']')
2097
{
2098
connect_to++;
2099
address[-1] = '\0';
2100
}
2101
1781
} else {
2102
1782
af = AF_INET;
2103
1783
}
2104
address = connect_to;
2105
1784
2106
1785
if(quit_now){
2107
1786
goto end;
2108
1787
}
2109
1788
2110
1789
while(not quit_now){
2111
1790
ret = start_mandos_communication(address, port, if_index, af);
2112
1791
if(quit_now or ret == 0){
2113
1792
break;
2114
1793
}
2115
if(debug){
2116
fprintf_plus(stderr, "Retrying in %d seconds\n",
2117
(int)retry_interval);
2118
}
2119
sleep((int)retry_interval);
2120
}
2121
1794
sleep((int)retry_interval or 1);
1795
};
1796
2122
1797
if (not quit_now){
2123
1798
exitcode = EXIT_SUCCESS;
2124
1799
}
2125
1800
2126
1801
goto end;
2127
1802
}
2128
1803
2150
1825
2151
1826
/* Check if creating the Avahi server object succeeded */
2152
1827
if(mc.server == NULL){
2153
fprintf_plus(stderr, "Failed to create Avahi server: %s\n",
2154
avahi_strerror(error));
1828
fprintf(stderr, "Failed to create Avahi server: %s\n",
1829
avahi_strerror(error));
2155
1830
exitcode = EX_UNAVAILABLE;
2156
1831
goto end;
2157
1832
}
2165
1840
AVAHI_PROTO_UNSPEC, "_mandos._tcp",
2166
1841
NULL, 0, browse_callback, NULL);
2167
1842
if(sb == NULL){
2168
fprintf_plus(stderr, "Failed to create service browser: %s\n",
2169
avahi_strerror(avahi_server_errno(mc.server)));
1843
fprintf(stderr, "Failed to create service browser: %s\n",
1844
avahi_strerror(avahi_server_errno(mc.server)));
2170
1845
exitcode = EX_UNAVAILABLE;
2171
1846
goto end;
2172
1847
}
2178
1853
/* Run the main loop */
2179
1854
2180
1855
if(debug){
2181
fprintf_plus(stderr, "Starting Avahi loop search\n");
1856
fprintf(stderr, "Starting Avahi loop search\n");
2182
1857
}
2183
1858
2184
1859
ret = avahi_loop_with_timeout(mc.simple_poll,
2185
1860
(int)(retry_interval * 1000));
2186
1861
if(debug){
2187
fprintf_plus(stderr, "avahi_loop_with_timeout exited %s\n",
2188
(ret == 0) ? "successfully" : "with error");
1862
fprintf(stderr, "avahi_loop_with_timeout exited %s\n",
1863
(ret == 0) ? "successfully" : "with error");
2189
1864
}
2190
1865
2191
1866
end:
2192
1867
2193
1868
if(debug){
2194
fprintf_plus(stderr, "%s exiting\n", argv[0]);
1869
fprintf(stderr, "%s exiting\n", argv[0]);
2195
1870
}
2196
1871
2197
1872
/* Cleanup things */
2213
1888
if(gpgme_initialized){
2214
1889
gpgme_release(mc.ctx);
2215
1890
}
2216
1891
2217
1892
/* Cleans up the circular linked list of Mandos servers the client
2218
1893
has seen */
2219
1894
if(mc.current_server != NULL){
2225
1900
}
2226
1901
}
2227
1902
2228
/* Run network hooks */
2229
run_network_hooks("stop", interface, delay);
2230
2231
/* Re-raise priviliges */
2232
{
1903
/* Take down the network interface */
1904
if(take_down_interface){
1905
/* Re-raise priviliges */
2233
1906
errno = 0;
2234
1907
ret = seteuid(0);
2235
1908
if(ret == -1){
2236
1909
perror_plus("seteuid");
2237
1910
}
2238
2239
/* Take down the network interface */
2240
if(take_down_interface and geteuid() == 0){
1911
if(geteuid() == 0){
2241
1912
ret = ioctl(sd, SIOCGIFFLAGS, &network);
2242
1913
if(ret == -1){
2243
1914
perror_plus("ioctl SIOCGIFFLAGS");
2244
} else if(network.ifr_flags & IFF_UP){
1915
} else if(network.ifr_flags & IFF_UP) {
2245
1916
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
2246
1917
ret = ioctl(sd, SIOCSIFFLAGS, &network);
2247
1918
if(ret == -1){
2252
1923
if(ret == -1){
2253
1924
perror_plus("close");
2254
1925
}
1926
/* Lower privileges permanently */
1927
errno = 0;
1928
ret = setuid(uid);
1929
if(ret == -1){
1930
perror_plus("setuid");
1931
}
2255
1932
}
2256
1933
}
2257
/* Lower privileges permanently */
2258
errno = 0;
2259
ret = setuid(uid);
2260
if(ret == -1){
2261
perror_plus("setuid");
2262
}
2263
1934
2264
1935
/* Removes the GPGME temp directory and all files inside */
2265
1936
if(tempdir_created){
2266
1937
struct dirent **direntries = NULL;
2267
1938
struct dirent *direntry = NULL;
2268
int numentries = scandir(tempdir, &direntries, notdotentries,
2269
alphasort);
2270
if (numentries > 0){
2271
for(int i = 0; i < numentries; i++){
1939
ret = scandir(tempdir, &direntries, notdotentries, alphasort);
1940
if (ret > 0){
1941
for(int i = 0; i < ret; i++){
2272
1942
direntry = direntries[i];
2273
1943
char *fullname = NULL;
2274
1944
ret = asprintf(&fullname, "%s/%s", tempdir,
2279
1949
}
2280
1950
ret = remove(fullname);
2281
1951
if(ret == -1){
2282
fprintf_plus(stderr, "remove(\"%s\"): %s\n", fullname,
2283
strerror(errno));
1952
fprintf(stderr, "remove(\"%s\"): %s\n", fullname,
1953
strerror(errno));
2284
1954
}
2285
1955
free(fullname);
2286
1956
}
2287
1957
}
2288
1958
2289
/* need to clean even if 0 because man page doesn't specify */
1959
/* need to be cleaned even if ret == 0 because man page doesn't
1960
specify */
2290
1961
free(direntries);
2291
if (numentries == -1){
1962
if (ret == -1){
2292
1963
perror_plus("scandir");
2293
1964
}
2294
1965
ret = rmdir(tempdir);
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0