To get this branch, use:
bzr branch
http://bzr.recompile.se/loggerhead/mandos/trunk
« back to all changes in this revision
Viewing changes to plugins.d/mandos-client.c
- browse files at revision 288
- compare with another revision
- download diff
- download tarball
- view history from revision 288
- Committer: Teddy Hogeborn
- Date: 2009-01-27 15:42:41 UTC
- Revision ID: teddy@fukt.bsnet.se-20090127154241-x0kosjtvuo0iuptd
* plugins.d/mandos-client.c (main): Use separate bool variable instead
of clumsy NUL character in
"tempdir". Bug fix: Don't try to
remove temp directory if it was
never created.
of clumsy NUL character in
"tempdir". Bug fix: Don't try to
remove temp directory if it was
never created.
- files modified:
- INSTALL
added
removed
plugins.d/mandos-client.c
30
30
*/
31
31
32
32
/* Needed by GPGME, specifically gpgme_data_seek() */
33
#ifndef _LARGEFILE_SOURCE
34
33
#define _LARGEFILE_SOURCE
35
#endif
36
#ifndef _FILE_OFFSET_BITS
37
34
#define _FILE_OFFSET_BITS 64
38
#endif
39
35
40
36
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), asprintf() */
41
37
42
38
#include <stdio.h> /* fprintf(), stderr, fwrite(),
43
stdout, ferror(), remove() */
39
stdout, ferror(), sscanf(),
40
remove() */
44
41
#include <stdint.h> /* uint16_t, uint32_t */
45
42
#include <stddef.h> /* NULL, size_t, ssize_t */
46
43
#include <stdlib.h> /* free(), EXIT_SUCCESS, EXIT_FAILURE,
47
srand(), strtof() */
48
#include <stdbool.h> /* bool, false, true */
44
srand() */
45
#include <stdbool.h> /* bool, true */
49
46
#include <string.h> /* memset(), strcmp(), strlen(),
50
47
strerror(), asprintf(), strcpy() */
51
#include <sys/ioctl.h> /* ioctl */
48
#include <sys/ioctl.h> /* ioctl */
52
49
#include <sys/types.h> /* socket(), inet_pton(), sockaddr,
53
50
sockaddr_in6, PF_INET6,
54
SOCK_STREAM, uid_t, gid_t, open(),
55
opendir(), DIR */
51
SOCK_STREAM, INET6_ADDRSTRLEN,
52
uid_t, gid_t, open(), opendir(),
53
DIR */
56
54
#include <sys/stat.h> /* open() */
57
55
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
58
inet_pton(), connect() */
56
struct in6_addr, inet_pton(),
57
connect() */
59
58
#include <fcntl.h> /* open() */
60
59
#include <dirent.h> /* opendir(), struct dirent, readdir()
61
60
*/
62
#include <inttypes.h> /* PRIu16, PRIdMAX, intmax_t,
63
strtoimax() */
61
#include <inttypes.h> /* PRIu16, intmax_t, SCNdMAX */
64
62
#include <assert.h> /* assert() */
65
63
#include <errno.h> /* perror(), errno */
66
#include <time.h> /* nanosleep(), time() */
64
#include <time.h> /* time() */
67
65
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
68
66
SIOCSIFFLAGS, if_indextoname(),
69
67
if_nametoindex(), IF_NAMESIZE */
70
#include <netinet/in.h> /* IN6_IS_ADDR_LINKLOCAL,
71
INET_ADDRSTRLEN, INET6_ADDRSTRLEN
72
*/
68
#include <netinet/in.h>
73
69
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
74
70
getuid(), getgid(), setuid(),
75
71
setgid() */
76
72
#include <arpa/inet.h> /* inet_pton(), htons */
77
#include <iso646.h> /* not, or, and */
73
#include <iso646.h> /* not, and, or */
78
74
#include <argp.h> /* struct argp_option, error_t, struct
79
75
argp_state, struct argp,
80
76
argp_parse(), ARGP_KEY_ARG,
81
77
ARGP_KEY_END, ARGP_ERR_UNKNOWN */
82
#include <signal.h> /* sigemptyset(), sigaddset(),
83
sigaction(), SIGTERM, sig_atomic_t,
84
raise() */
85
86
#ifdef __linux__
87
#include <sys/klog.h> /* klogctl() */
88
#endif /* __linux__ */
89
78
90
79
/* Avahi */
91
80
/* All Avahi types, constants and functions
137
126
gpgme_ctx_t ctx;
138
127
} mandos_context;
139
128
140
/* global context so signal handler can reach it*/
141
mandos_context mc = { .simple_poll = NULL, .server = NULL,
142
.dh_bits = 1024, .priority = "SECURE256"
143
":!CTYPE-X.509:+CTYPE-OPENPGP" };
144
145
129
/*
146
* Make additional room in "buffer" for at least BUFFER_SIZE more
147
* bytes. "buffer_capacity" is how much is currently allocated,
130
* Make room in "buffer" for at least BUFFER_SIZE additional bytes.
131
* "buffer_capacity" is how much is currently allocated,
148
132
* "buffer_length" is how much is already used.
149
133
*/
150
size_t incbuffer(char **buffer, size_t buffer_length,
134
size_t adjustbuffer(char **buffer, size_t buffer_length,
151
135
size_t buffer_capacity){
152
136
if(buffer_length + BUFFER_SIZE > buffer_capacity){
153
137
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
162
146
/*
163
147
* Initialize GPGME.
164
148
*/
165
static bool init_gpgme(const char *seckey,
149
static bool init_gpgme(mandos_context *mc, const char *seckey,
166
150
const char *pubkey, const char *tempdir){
167
151
int ret;
168
152
gpgme_error_t rc;
189
173
return false;
190
174
}
191
175
192
rc = gpgme_op_import(mc.ctx, pgp_data);
176
rc = gpgme_op_import(mc->ctx, pgp_data);
193
177
if(rc != GPG_ERR_NO_ERROR){
194
178
fprintf(stderr, "bad gpgme_op_import: %s: %s\n",
195
179
gpgme_strsource(rc), gpgme_strerror(rc));
205
189
}
206
190
207
191
if(debug){
208
fprintf(stderr, "Initializing GPGME\n");
192
fprintf(stderr, "Initialize gpgme\n");
209
193
}
210
194
211
195
/* Init GPGME */
238
222
}
239
223
240
224
/* Create new GPGME "context" */
241
rc = gpgme_new(&(mc.ctx));
225
rc = gpgme_new(&(mc->ctx));
242
226
if(rc != GPG_ERR_NO_ERROR){
243
227
fprintf(stderr, "bad gpgme_new: %s: %s\n",
244
228
gpgme_strsource(rc), gpgme_strerror(rc));
249
233
return false;
250
234
}
251
235
252
return true;
236
return true;
253
237
}
254
238
255
239
/*
256
240
* Decrypt OpenPGP data.
257
241
* Returns -1 on error
258
242
*/
259
static ssize_t pgp_packet_decrypt(const char *cryptotext,
243
static ssize_t pgp_packet_decrypt(const mandos_context *mc,
244
const char *cryptotext,
260
245
size_t crypto_size,
261
246
char **plaintext){
262
247
gpgme_data_t dh_crypto, dh_plain;
289
274
290
275
/* Decrypt data from the cryptotext data buffer to the plaintext
291
276
data buffer */
292
rc = gpgme_op_decrypt(mc.ctx, dh_crypto, dh_plain);
277
rc = gpgme_op_decrypt(mc->ctx, dh_crypto, dh_plain);
293
278
if(rc != GPG_ERR_NO_ERROR){
294
279
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
295
280
gpgme_strsource(rc), gpgme_strerror(rc));
296
281
plaintext_length = -1;
297
282
if(debug){
298
283
gpgme_decrypt_result_t result;
299
result = gpgme_op_decrypt_result(mc.ctx);
284
result = gpgme_op_decrypt_result(mc->ctx);
300
285
if(result == NULL){
301
286
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
302
287
} else {
309
294
}
310
295
gpgme_recipient_t recipient;
311
296
recipient = result->recipients;
312
while(recipient != NULL){
313
fprintf(stderr, "Public key algorithm: %s\n",
314
gpgme_pubkey_algo_name(recipient->pubkey_algo));
315
fprintf(stderr, "Key ID: %s\n", recipient->keyid);
316
fprintf(stderr, "Secret key available: %s\n",
317
recipient->status == GPG_ERR_NO_SECKEY
318
? "No" : "Yes");
319
recipient = recipient->next;
297
if(recipient){
298
while(recipient != NULL){
299
fprintf(stderr, "Public key algorithm: %s\n",
300
gpgme_pubkey_algo_name(recipient->pubkey_algo));
301
fprintf(stderr, "Key ID: %s\n", recipient->keyid);
302
fprintf(stderr, "Secret key available: %s\n",
303
recipient->status == GPG_ERR_NO_SECKEY
304
? "No" : "Yes");
305
recipient = recipient->next;
306
}
320
307
}
321
308
}
322
309
}
336
323
337
324
*plaintext = NULL;
338
325
while(true){
339
plaintext_capacity = incbuffer(plaintext,
326
plaintext_capacity = adjustbuffer(plaintext,
340
327
(size_t)plaintext_length,
341
328
plaintext_capacity);
342
329
if(plaintext_capacity == 0){
343
perror("incbuffer");
330
perror("adjustbuffer");
344
331
plaintext_length = -1;
345
332
goto decrypt_end;
346
333
}
378
365
return plaintext_length;
379
366
}
380
367
381
static const char * safer_gnutls_strerror(int value){
368
static const char * safer_gnutls_strerror(int value) {
382
369
const char *ret = gnutls_strerror(value); /* Spurious warning from
383
370
-Wunreachable-code */
384
371
if(ret == NULL)
392
379
fprintf(stderr, "GnuTLS: %s", string);
393
380
}
394
381
395
static int init_gnutls_global(const char *pubkeyfilename,
382
static int init_gnutls_global(mandos_context *mc,
383
const char *pubkeyfilename,
396
384
const char *seckeyfilename){
397
385
int ret;
398
386
401
389
}
402
390
403
391
ret = gnutls_global_init();
404
if(ret != GNUTLS_E_SUCCESS){
392
if(ret != GNUTLS_E_SUCCESS) {
405
393
fprintf(stderr, "GnuTLS global_init: %s\n",
406
394
safer_gnutls_strerror(ret));
407
395
return -1;
416
404
}
417
405
418
406
/* OpenPGP credentials */
419
gnutls_certificate_allocate_credentials(&mc.cred);
407
gnutls_certificate_allocate_credentials(&mc->cred);
420
408
if(ret != GNUTLS_E_SUCCESS){
421
409
fprintf(stderr, "GnuTLS memory error: %s\n", /* Spurious warning
422
from
423
-Wunreachable-code
424
*/
410
* from
411
* -Wunreachable-code
412
*/
425
413
safer_gnutls_strerror(ret));
426
414
gnutls_global_deinit();
427
415
return -1;
434
422
}
435
423
436
424
ret = gnutls_certificate_set_openpgp_key_file
437
(mc.cred, pubkeyfilename, seckeyfilename,
425
(mc->cred, pubkeyfilename, seckeyfilename,
438
426
GNUTLS_OPENPGP_FMT_BASE64);
439
if(ret != GNUTLS_E_SUCCESS){
427
if(ret != GNUTLS_E_SUCCESS) {
440
428
fprintf(stderr,
441
429
"Error[%d] while reading the OpenPGP key pair ('%s',"
442
430
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
446
434
}
447
435
448
436
/* GnuTLS server initialization */
449
ret = gnutls_dh_params_init(&mc.dh_params);
450
if(ret != GNUTLS_E_SUCCESS){
437
ret = gnutls_dh_params_init(&mc->dh_params);
438
if(ret != GNUTLS_E_SUCCESS) {
451
439
fprintf(stderr, "Error in GnuTLS DH parameter initialization:"
452
440
" %s\n", safer_gnutls_strerror(ret));
453
441
goto globalfail;
454
442
}
455
ret = gnutls_dh_params_generate2(mc.dh_params, mc.dh_bits);
456
if(ret != GNUTLS_E_SUCCESS){
443
ret = gnutls_dh_params_generate2(mc->dh_params, mc->dh_bits);
444
if(ret != GNUTLS_E_SUCCESS) {
457
445
fprintf(stderr, "Error in GnuTLS prime generation: %s\n",
458
446
safer_gnutls_strerror(ret));
459
447
goto globalfail;
460
448
}
461
449
462
gnutls_certificate_set_dh_params(mc.cred, mc.dh_params);
450
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
463
451
464
452
return 0;
465
453
466
454
globalfail:
467
455
468
gnutls_certificate_free_credentials(mc.cred);
456
gnutls_certificate_free_credentials(mc->cred);
469
457
gnutls_global_deinit();
470
gnutls_dh_params_deinit(mc.dh_params);
458
gnutls_dh_params_deinit(mc->dh_params);
471
459
return -1;
472
460
}
473
461
474
static int init_gnutls_session(gnutls_session_t *session){
462
static int init_gnutls_session(mandos_context *mc,
463
gnutls_session_t *session){
475
464
int ret;
476
465
/* GnuTLS session creation */
477
466
ret = gnutls_init(session, GNUTLS_SERVER);
482
471
483
472
{
484
473
const char *err;
485
ret = gnutls_priority_set_direct(*session, mc.priority, &err);
486
if(ret != GNUTLS_E_SUCCESS){
474
ret = gnutls_priority_set_direct(*session, mc->priority, &err);
475
if(ret != GNUTLS_E_SUCCESS) {
487
476
fprintf(stderr, "Syntax error at: %s\n", err);
488
477
fprintf(stderr, "GnuTLS error: %s\n",
489
478
safer_gnutls_strerror(ret));
493
482
}
494
483
495
484
ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,
496
mc.cred);
497
if(ret != GNUTLS_E_SUCCESS){
485
mc->cred);
486
if(ret != GNUTLS_E_SUCCESS) {
498
487
fprintf(stderr, "Error setting GnuTLS credentials: %s\n",
499
488
safer_gnutls_strerror(ret));
500
489
gnutls_deinit(*session);
505
494
gnutls_certificate_server_set_request(*session,
506
495
GNUTLS_CERT_IGNORE);
507
496
508
gnutls_dh_set_prime_bits(*session, mc.dh_bits);
497
gnutls_dh_set_prime_bits(*session, mc->dh_bits);
509
498
510
499
return 0;
511
500
}
514
503
static void empty_log(__attribute__((unused)) AvahiLogLevel level,
515
504
__attribute__((unused)) const char *txt){}
516
505
517
sig_atomic_t quit_now = 0;
518
int signal_received = 0;
519
520
506
/* Called when a Mandos server is found */
521
507
static int start_mandos_communication(const char *ip, uint16_t port,
522
508
AvahiIfIndex if_index,
523
int af){
524
int ret, tcp_sd = -1;
509
mandos_context *mc){
510
int ret, tcp_sd;
525
511
ssize_t sret;
526
union {
527
struct sockaddr_in in;
528
struct sockaddr_in6 in6;
529
} to;
512
union { struct sockaddr in; struct sockaddr_in6 in6; } to;
530
513
char *buffer = NULL;
531
514
char *decrypted_buffer;
532
515
size_t buffer_length = 0;
534
517
ssize_t decrypted_buffer_size;
535
518
size_t written;
536
519
int retval = 0;
520
char interface[IF_NAMESIZE];
537
521
gnutls_session_t session;
538
int pf; /* Protocol family */
539
540
if(quit_now){
541
return -1;
542
}
543
544
switch(af){
545
case AF_INET6:
546
pf = PF_INET6;
547
break;
548
case AF_INET:
549
pf = PF_INET;
550
break;
551
default:
552
fprintf(stderr, "Bad address family: %d\n", af);
553
return -1;
554
}
555
556
ret = init_gnutls_session(&session);
522
523
ret = init_gnutls_session(mc, &session);
557
524
if(ret != 0){
558
525
return -1;
559
526
}
560
527
561
528
if(debug){
562
fprintf(stderr, "Setting up a TCP connection to %s, port %" PRIu16
529
fprintf(stderr, "Setting up a tcp connection to %s, port %" PRIu16
563
530
"\n", ip, port);
564
531
}
565
532
566
tcp_sd = socket(pf, SOCK_STREAM, 0);
567
if(tcp_sd < 0){
533
tcp_sd = socket(PF_INET6, SOCK_STREAM, 0);
534
if(tcp_sd < 0) {
568
535
perror("socket");
569
retval = -1;
570
goto mandos_end;
536
return -1;
571
537
}
572
538
573
if(quit_now){
574
goto mandos_end;
539
if(debug){
540
if(if_indextoname((unsigned int)if_index, interface) == NULL){
541
perror("if_indextoname");
542
return -1;
543
}
544
fprintf(stderr, "Binding to interface %s\n", interface);
575
545
}
576
546
577
547
memset(&to, 0, sizeof(to));
578
if(af == AF_INET6){
579
to.in6.sin6_family = (sa_family_t)af;
580
ret = inet_pton(af, ip, &to.in6.sin6_addr);
581
} else { /* IPv4 */
582
to.in.sin_family = (sa_family_t)af;
583
ret = inet_pton(af, ip, &to.in.sin_addr);
584
}
548
to.in6.sin6_family = AF_INET6;
549
/* It would be nice to have a way to detect if we were passed an
550
IPv4 address here. Now we assume an IPv6 address. */
551
ret = inet_pton(AF_INET6, ip, &to.in6.sin6_addr);
585
552
if(ret < 0 ){
586
553
perror("inet_pton");
587
retval = -1;
588
goto mandos_end;
554
return -1;
589
555
}
590
556
if(ret == 0){
591
557
fprintf(stderr, "Bad address: %s\n", ip);
592
retval = -1;
593
goto mandos_end;
558
return -1;
594
559
}
595
if(af == AF_INET6){
596
to.in6.sin6_port = htons(port); /* Spurious warnings from
597
-Wconversion and
598
-Wunreachable-code */
599
600
if(IN6_IS_ADDR_LINKLOCAL /* Spurious warnings from */
601
(&to.in6.sin6_addr)){ /* -Wstrict-aliasing=2 or lower and
602
-Wunreachable-code*/
603
if(if_index == AVAHI_IF_UNSPEC){
604
fprintf(stderr, "An IPv6 link-local address is incomplete"
605
" without a network interface\n");
606
retval = -1;
607
goto mandos_end;
608
}
609
/* Set the network interface number as scope */
610
to.in6.sin6_scope_id = (uint32_t)if_index;
611
}
612
} else {
613
to.in.sin_port = htons(port); /* Spurious warnings from
560
to.in6.sin6_port = htons(port); /* Spurious warnings from
614
561
-Wconversion and
615
562
-Wunreachable-code */
616
}
617
563
618
if(quit_now){
619
goto mandos_end;
620
}
564
to.in6.sin6_scope_id = (uint32_t)if_index;
621
565
622
566
if(debug){
623
if(af == AF_INET6 and if_index != AVAHI_IF_UNSPEC){
624
char interface[IF_NAMESIZE];
625
if(if_indextoname((unsigned int)if_index, interface) == NULL){
626
perror("if_indextoname");
627
} else {
628
fprintf(stderr, "Connection to: %s%%%s, port %" PRIu16 "\n",
629
ip, interface, port);
630
}
631
} else {
632
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
633
port);
634
}
635
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
636
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
637
const char *pcret;
638
if(af == AF_INET6){
639
pcret = inet_ntop(af, &(to.in6.sin6_addr), addrstr,
640
sizeof(addrstr));
641
} else {
642
pcret = inet_ntop(af, &(to.in.sin_addr), addrstr,
643
sizeof(addrstr));
644
}
645
if(pcret == NULL){
567
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
568
port);
569
char addrstr[INET6_ADDRSTRLEN] = "";
570
if(inet_ntop(to.in6.sin6_family, &(to.in6.sin6_addr), addrstr,
571
sizeof(addrstr)) == NULL){
646
572
perror("inet_ntop");
647
573
} else {
648
574
if(strcmp(addrstr, ip) != 0){
651
577
}
652
578
}
653
579
654
if(quit_now){
655
goto mandos_end;
656
}
657
658
if(af == AF_INET6){
659
ret = connect(tcp_sd, &to.in6, sizeof(to));
660
} else {
661
ret = connect(tcp_sd, &to.in, sizeof(to)); /* IPv4 */
662
}
580
ret = connect(tcp_sd, &to.in, sizeof(to));
663
581
if(ret < 0){
664
582
perror("connect");
665
retval = -1;
666
goto mandos_end;
667
}
668
669
if(quit_now){
670
goto mandos_end;
583
return -1;
671
584
}
672
585
673
586
const char *out = mandos_protocol_version;
692
605
break;
693
606
}
694
607
}
695
696
if(quit_now){
697
goto mandos_end;
698
}
699
608
}
700
609
701
610
if(debug){
702
611
fprintf(stderr, "Establishing TLS session with %s\n", ip);
703
612
}
704
613
705
if(quit_now){
706
goto mandos_end;
707
}
708
709
614
gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t) tcp_sd);
710
615
711
if(quit_now){
712
goto mandos_end;
713
}
714
715
616
do{
716
617
ret = gnutls_handshake(session);
717
if(quit_now){
718
goto mandos_end;
719
}
720
618
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
721
619
722
620
if(ret != GNUTLS_E_SUCCESS){
731
629
/* Read OpenPGP packet that contains the wanted password */
732
630
733
631
if(debug){
734
fprintf(stderr, "Retrieving OpenPGP encrypted password from %s\n",
632
fprintf(stderr, "Retrieving pgp encrypted password from %s\n",
735
633
ip);
736
634
}
737
635
738
636
while(true){
739
740
if(quit_now){
741
goto mandos_end;
742
}
743
744
buffer_capacity = incbuffer(&buffer, buffer_length,
637
buffer_capacity = adjustbuffer(&buffer, buffer_length,
745
638
buffer_capacity);
746
639
if(buffer_capacity == 0){
747
perror("incbuffer");
640
perror("adjustbuffer");
748
641
retval = -1;
749
642
goto mandos_end;
750
643
}
751
644
752
if(quit_now){
753
goto mandos_end;
754
}
755
756
645
sret = gnutls_record_recv(session, buffer+buffer_length,
757
646
BUFFER_SIZE);
758
647
if(sret == 0){
766
655
case GNUTLS_E_REHANDSHAKE:
767
656
do{
768
657
ret = gnutls_handshake(session);
769
770
if(quit_now){
771
goto mandos_end;
772
}
773
658
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
774
659
if(ret < 0){
775
660
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
794
679
fprintf(stderr, "Closing TLS session\n");
795
680
}
796
681
797
if(quit_now){
798
goto mandos_end;
799
}
800
801
682
gnutls_bye(session, GNUTLS_SHUT_RDWR);
802
683
803
if(quit_now){
804
goto mandos_end;
805
}
806
807
684
if(buffer_length > 0){
808
decrypted_buffer_size = pgp_packet_decrypt(buffer,
685
decrypted_buffer_size = pgp_packet_decrypt(mc, buffer,
809
686
buffer_length,
810
687
&decrypted_buffer);
811
688
if(decrypted_buffer_size >= 0){
812
689
written = 0;
813
690
while(written < (size_t) decrypted_buffer_size){
814
if(quit_now){
815
goto mandos_end;
816
}
817
818
691
ret = (int)fwrite(decrypted_buffer + written, 1,
819
692
(size_t)decrypted_buffer_size - written,
820
693
stdout);
840
713
841
714
mandos_end:
842
715
free(buffer);
843
if(tcp_sd >= 0){
844
ret = (int)TEMP_FAILURE_RETRY(close(tcp_sd));
845
}
716
ret = (int)TEMP_FAILURE_RETRY(close(tcp_sd));
846
717
if(ret == -1){
847
718
perror("close");
848
719
}
849
720
gnutls_deinit(session);
850
if(quit_now){
851
retval = -1;
852
}
853
721
return retval;
854
722
}
855
723
856
724
static void resolve_callback(AvahiSServiceResolver *r,
857
725
AvahiIfIndex interface,
858
AvahiProtocol proto,
726
AVAHI_GCC_UNUSED AvahiProtocol protocol,
859
727
AvahiResolverEvent event,
860
728
const char *name,
861
729
const char *type,
866
734
AVAHI_GCC_UNUSED AvahiStringList *txt,
867
735
AVAHI_GCC_UNUSED AvahiLookupResultFlags
868
736
flags,
869
AVAHI_GCC_UNUSED void* userdata){
737
void* userdata) {
738
mandos_context *mc = userdata;
870
739
assert(r);
871
740
872
741
/* Called whenever a service has been resolved successfully or
873
742
timed out */
874
743
875
if(quit_now){
876
return;
877
}
878
879
switch(event){
744
switch(event) {
880
745
default:
881
746
case AVAHI_RESOLVER_FAILURE:
882
747
fprintf(stderr, "(Avahi Resolver) Failed to resolve service '%s'"
883
748
" of type '%s' in domain '%s': %s\n", name, type, domain,
884
avahi_strerror(avahi_server_errno(mc.server)));
749
avahi_strerror(avahi_server_errno(mc->server)));
885
750
break;
886
751
887
752
case AVAHI_RESOLVER_FOUND:
893
758
PRIdMAX ") on port %" PRIu16 "\n", name, host_name,
894
759
ip, (intmax_t)interface, port);
895
760
}
896
int ret = start_mandos_communication(ip, port, interface,
897
avahi_proto_to_af(proto));
761
int ret = start_mandos_communication(ip, port, interface, mc);
898
762
if(ret == 0){
899
avahi_simple_poll_quit(mc.simple_poll);
763
avahi_simple_poll_quit(mc->simple_poll);
900
764
}
901
765
}
902
766
}
903
767
avahi_s_service_resolver_free(r);
904
768
}
905
769
906
static void browse_callback(AvahiSServiceBrowser *b,
907
AvahiIfIndex interface,
908
AvahiProtocol protocol,
909
AvahiBrowserEvent event,
910
const char *name,
911
const char *type,
912
const char *domain,
913
AVAHI_GCC_UNUSED AvahiLookupResultFlags
914
flags,
915
AVAHI_GCC_UNUSED void* userdata){
770
static void browse_callback( AvahiSServiceBrowser *b,
771
AvahiIfIndex interface,
772
AvahiProtocol protocol,
773
AvahiBrowserEvent event,
774
const char *name,
775
const char *type,
776
const char *domain,
777
AVAHI_GCC_UNUSED AvahiLookupResultFlags
778
flags,
779
void* userdata) {
780
mandos_context *mc = userdata;
916
781
assert(b);
917
782
918
783
/* Called whenever a new services becomes available on the LAN or
919
784
is removed from the LAN */
920
785
921
if(quit_now){
922
return;
923
}
924
925
switch(event){
786
switch(event) {
926
787
default:
927
788
case AVAHI_BROWSER_FAILURE:
928
789
929
790
fprintf(stderr, "(Avahi browser) %s\n",
930
avahi_strerror(avahi_server_errno(mc.server)));
931
avahi_simple_poll_quit(mc.simple_poll);
791
avahi_strerror(avahi_server_errno(mc->server)));
792
avahi_simple_poll_quit(mc->simple_poll);
932
793
return;
933
794
934
795
case AVAHI_BROWSER_NEW:
937
798
the callback function is called the Avahi server will free the
938
799
resolver for us. */
939
800
940
if(avahi_s_service_resolver_new(mc.server, interface, protocol,
941
name, type, domain, protocol, 0,
942
resolve_callback, NULL) == NULL)
801
if(!(avahi_s_service_resolver_new(mc->server, interface,
802
protocol, name, type, domain,
803
AVAHI_PROTO_INET6, 0,
804
resolve_callback, mc)))
943
805
fprintf(stderr, "Avahi: Failed to resolve service '%s': %s\n",
944
name, avahi_strerror(avahi_server_errno(mc.server)));
806
name, avahi_strerror(avahi_server_errno(mc->server)));
945
807
break;
946
808
947
809
case AVAHI_BROWSER_REMOVE:
956
818
}
957
819
}
958
820
959
/* stop main loop after sigterm has been called */
960
static void handle_sigterm(int sig){
961
if(quit_now){
962
return;
963
}
964
quit_now = 1;
965
signal_received = sig;
966
int old_errno = errno;
967
if(mc.simple_poll != NULL){
968
avahi_simple_poll_quit(mc.simple_poll);
969
}
970
errno = old_errno;
971
}
972
973
821
int main(int argc, char *argv[]){
974
AvahiSServiceBrowser *sb = NULL;
975
int error;
976
int ret;
977
intmax_t tmpmax;
978
char *tmp;
979
int exitcode = EXIT_SUCCESS;
980
const char *interface = "eth0";
981
struct ifreq network;
982
int sd = -1;
983
bool take_down_interface = false;
984
uid_t uid;
985
gid_t gid;
986
char *connect_to = NULL;
987
char tempdir[] = "/tmp/mandosXXXXXX";
988
bool tempdir_created = false;
989
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
990
const char *seckey = PATHDIR "/" SECKEY;
991
const char *pubkey = PATHDIR "/" PUBKEY;
992
993
bool gnutls_initialized = false;
994
bool gpgme_initialized = false;
995
float delay = 2.5f;
996
997
struct sigaction old_sigterm_action;
998
struct sigaction sigterm_action = { .sa_handler = handle_sigterm };
999
1000
{
1001
struct argp_option options[] = {
1002
{ .name = "debug", .key = 128,
1003
.doc = "Debug mode", .group = 3 },
1004
{ .name = "connect", .key = 'c',
1005
.arg = "ADDRESS:PORT",
1006
.doc = "Connect directly to a specific Mandos server",
1007
.group = 1 },
1008
{ .name = "interface", .key = 'i',
1009
.arg = "NAME",
1010
.doc = "Network interface that will be used to search for"
1011
" Mandos servers",
1012
.group = 1 },
1013
{ .name = "seckey", .key = 's',
1014
.arg = "FILE",
1015
.doc = "OpenPGP secret key file base name",
1016
.group = 1 },
1017
{ .name = "pubkey", .key = 'p',
1018
.arg = "FILE",
1019
.doc = "OpenPGP public key file base name",
1020
.group = 2 },
1021
{ .name = "dh-bits", .key = 129,
1022
.arg = "BITS",
1023
.doc = "Bit length of the prime number used in the"
1024
" Diffie-Hellman key exchange",
1025
.group = 2 },
1026
{ .name = "priority", .key = 130,
1027
.arg = "STRING",
1028
.doc = "GnuTLS priority string for the TLS handshake",
1029
.group = 1 },
1030
{ .name = "delay", .key = 131,
1031
.arg = "SECONDS",
1032
.doc = "Maximum delay to wait for interface startup",
1033
.group = 2 },
1034
{ .name = NULL }
1035
};
1036
1037
error_t parse_opt(int key, char *arg,
1038
struct argp_state *state){
1039
switch(key){
1040
case 128: /* --debug */
1041
debug = true;
1042
break;
1043
case 'c': /* --connect */
1044
connect_to = arg;
1045
break;
1046
case 'i': /* --interface */
1047
interface = arg;
1048
break;
1049
case 's': /* --seckey */
1050
seckey = arg;
1051
break;
1052
case 'p': /* --pubkey */
1053
pubkey = arg;
1054
break;
1055
case 129: /* --dh-bits */
1056
errno = 0;
1057
tmpmax = strtoimax(arg, &tmp, 10);
1058
if(errno != 0 or tmp == arg or *tmp != '\0'
1059
or tmpmax != (typeof(mc.dh_bits))tmpmax){
1060
fprintf(stderr, "Bad number of DH bits\n");
1061
exit(EXIT_FAILURE);
1062
}
1063
mc.dh_bits = (typeof(mc.dh_bits))tmpmax;
1064
break;
1065
case 130: /* --priority */
1066
mc.priority = arg;
1067
break;
1068
case 131: /* --delay */
1069
errno = 0;
1070
delay = strtof(arg, &tmp);
1071
if(errno != 0 or tmp == arg or *tmp != '\0'){
1072
fprintf(stderr, "Bad delay\n");
1073
exit(EXIT_FAILURE);
1074
}
1075
break;
1076
case ARGP_KEY_ARG:
1077
argp_usage(state);
1078
case ARGP_KEY_END:
1079
break;
1080
default:
1081
return ARGP_ERR_UNKNOWN;
1082
}
1083
return 0;
1084
}
1085
1086
struct argp argp = { .options = options, .parser = parse_opt,
1087
.args_doc = "",
1088
.doc = "Mandos client -- Get and decrypt"
1089
" passwords from a Mandos server" };
1090
ret = argp_parse(&argp, argc, argv, 0, 0, NULL);
1091
if(ret == ARGP_ERR_UNKNOWN){
1092
fprintf(stderr, "Unknown error while parsing arguments\n");
1093
exitcode = EXIT_FAILURE;
1094
goto end;
1095
}
1096
}
1097
1098
if(not debug){
1099
avahi_set_log_function(empty_log);
1100
}
1101
1102
/* Initialize Avahi early so avahi_simple_poll_quit() can be called
1103
from the signal handler */
1104
/* Initialize the pseudo-RNG for Avahi */
1105
srand((unsigned int) time(NULL));
1106
mc.simple_poll = avahi_simple_poll_new();
1107
if(mc.simple_poll == NULL){
1108
fprintf(stderr, "Avahi: Failed to create simple poll object.\n");
1109
exitcode = EXIT_FAILURE;
1110
goto end;
1111
}
1112
1113
sigemptyset(&sigterm_action.sa_mask);
1114
ret = sigaddset(&sigterm_action.sa_mask, SIGINT);
1115
if(ret == -1){
1116
perror("sigaddset");
1117
exitcode = EXIT_FAILURE;
1118
goto end;
1119
}
1120
ret = sigaddset(&sigterm_action.sa_mask, SIGHUP);
1121
if(ret == -1){
1122
perror("sigaddset");
1123
exitcode = EXIT_FAILURE;
1124
goto end;
1125
}
1126
ret = sigaddset(&sigterm_action.sa_mask, SIGTERM);
1127
if(ret == -1){
1128
perror("sigaddset");
1129
exitcode = EXIT_FAILURE;
1130
goto end;
1131
}
1132
/* Need to check if the handler is SIG_IGN before handling:
1133
| [[info:libc:Initial Signal Actions]] |
1134
| [[info:libc:Basic Signal Handling]] |
1135
*/
1136
ret = sigaction(SIGINT, NULL, &old_sigterm_action);
1137
if(ret == -1){
1138
perror("sigaction");
1139
return EXIT_FAILURE;
1140
}
1141
if(old_sigterm_action.sa_handler != SIG_IGN){
1142
ret = sigaction(SIGINT, &sigterm_action, NULL);
1143
if(ret == -1){
1144
perror("sigaction");
1145
exitcode = EXIT_FAILURE;
1146
goto end;
1147
}
1148
}
1149
ret = sigaction(SIGHUP, NULL, &old_sigterm_action);
1150
if(ret == -1){
1151
perror("sigaction");
1152
return EXIT_FAILURE;
1153
}
1154
if(old_sigterm_action.sa_handler != SIG_IGN){
1155
ret = sigaction(SIGHUP, &sigterm_action, NULL);
1156
if(ret == -1){
1157
perror("sigaction");
1158
exitcode = EXIT_FAILURE;
1159
goto end;
1160
}
1161
}
1162
ret = sigaction(SIGTERM, NULL, &old_sigterm_action);
1163
if(ret == -1){
1164
perror("sigaction");
1165
return EXIT_FAILURE;
1166
}
1167
if(old_sigterm_action.sa_handler != SIG_IGN){
1168
ret = sigaction(SIGTERM, &sigterm_action, NULL);
1169
if(ret == -1){
1170
perror("sigaction");
1171
exitcode = EXIT_FAILURE;
1172
goto end;
1173
}
1174
}
1175
1176
/* If the interface is down, bring it up */
1177
if(interface[0] != '\0'){
1178
if_index = (AvahiIfIndex) if_nametoindex(interface);
1179
if(if_index == 0){
1180
fprintf(stderr, "No such interface: \"%s\"\n", interface);
1181
exitcode = EXIT_FAILURE;
1182
goto end;
1183
}
1184
1185
if(quit_now){
1186
goto end;
1187
}
1188
1189
#ifdef __linux__
1190
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1191
messages to mess up the prompt */
1192
ret = klogctl(8, NULL, 5);
1193
bool restore_loglevel = true;
1194
if(ret == -1){
1195
restore_loglevel = false;
1196
perror("klogctl");
1197
}
1198
#endif /* __linux__ */
1199
1200
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1201
if(sd < 0){
1202
perror("socket");
1203
exitcode = EXIT_FAILURE;
1204
#ifdef __linux__
1205
if(restore_loglevel){
1206
ret = klogctl(7, NULL, 0);
1207
if(ret == -1){
1208
perror("klogctl");
1209
}
1210
}
1211
#endif /* __linux__ */
1212
goto end;
1213
}
1214
strcpy(network.ifr_name, interface);
1215
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1216
if(ret == -1){
1217
perror("ioctl SIOCGIFFLAGS");
1218
#ifdef __linux__
1219
if(restore_loglevel){
1220
ret = klogctl(7, NULL, 0);
1221
if(ret == -1){
1222
perror("klogctl");
1223
}
1224
}
1225
#endif /* __linux__ */
1226
exitcode = EXIT_FAILURE;
1227
goto end;
1228
}
1229
if((network.ifr_flags & IFF_UP) == 0){
1230
network.ifr_flags |= IFF_UP;
1231
take_down_interface = true;
1232
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1233
if(ret == -1){
1234
take_down_interface = false;
1235
perror("ioctl SIOCSIFFLAGS");
1236
exitcode = EXIT_FAILURE;
1237
#ifdef __linux__
1238
if(restore_loglevel){
1239
ret = klogctl(7, NULL, 0);
1240
if(ret == -1){
1241
perror("klogctl");
822
AvahiSServiceBrowser *sb = NULL;
823
int error;
824
int ret;
825
intmax_t tmpmax;
826
int numchars;
827
int exitcode = EXIT_SUCCESS;
828
const char *interface = "eth0";
829
struct ifreq network;
830
int sd;
831
uid_t uid;
832
gid_t gid;
833
char *connect_to = NULL;
834
char tempdir[] = "/tmp/mandosXXXXXX";
835
bool tempdir_created = false;
836
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
837
const char *seckey = PATHDIR "/" SECKEY;
838
const char *pubkey = PATHDIR "/" PUBKEY;
839
840
mandos_context mc = { .simple_poll = NULL, .server = NULL,
841
.dh_bits = 1024, .priority = "SECURE256"
842
":!CTYPE-X.509:+CTYPE-OPENPGP" };
843
bool gnutls_initialized = false;
844
bool gpgme_initialized = false;
845
846
{
847
struct argp_option options[] = {
848
{ .name = "debug", .key = 128,
849
.doc = "Debug mode", .group = 3 },
850
{ .name = "connect", .key = 'c',
851
.arg = "ADDRESS:PORT",
852
.doc = "Connect directly to a specific Mandos server",
853
.group = 1 },
854
{ .name = "interface", .key = 'i',
855
.arg = "NAME",
856
.doc = "Interface that will be used to search for Mandos"
857
" servers",
858
.group = 1 },
859
{ .name = "seckey", .key = 's',
860
.arg = "FILE",
861
.doc = "OpenPGP secret key file base name",
862
.group = 1 },
863
{ .name = "pubkey", .key = 'p',
864
.arg = "FILE",
865
.doc = "OpenPGP public key file base name",
866
.group = 2 },
867
{ .name = "dh-bits", .key = 129,
868
.arg = "BITS",
869
.doc = "Bit length of the prime number used in the"
870
" Diffie-Hellman key exchange",
871
.group = 2 },
872
{ .name = "priority", .key = 130,
873
.arg = "STRING",
874
.doc = "GnuTLS priority string for the TLS handshake",
875
.group = 1 },
876
{ .name = NULL }
877
};
878
879
error_t parse_opt(int key, char *arg,
880
struct argp_state *state) {
881
switch(key) {
882
case 128: /* --debug */
883
debug = true;
884
break;
885
case 'c': /* --connect */
886
connect_to = arg;
887
break;
888
case 'i': /* --interface */
889
interface = arg;
890
break;
891
case 's': /* --seckey */
892
seckey = arg;
893
break;
894
case 'p': /* --pubkey */
895
pubkey = arg;
896
break;
897
case 129: /* --dh-bits */
898
ret = sscanf(arg, "%" SCNdMAX "%n", &tmpmax, &numchars);
899
if(ret < 1 or tmpmax != (typeof(mc.dh_bits))tmpmax
900
or arg[numchars] != '\0'){
901
fprintf(stderr, "Bad number of DH bits\n");
902
exit(EXIT_FAILURE);
1242
903
}
904
mc.dh_bits = (typeof(mc.dh_bits))tmpmax;
905
break;
906
case 130: /* --priority */
907
mc.priority = arg;
908
break;
909
case ARGP_KEY_ARG:
910
argp_usage(state);
911
case ARGP_KEY_END:
912
break;
913
default:
914
return ARGP_ERR_UNKNOWN;
1243
915
}
1244
#endif /* __linux__ */
916
return 0;
917
}
918
919
struct argp argp = { .options = options, .parser = parse_opt,
920
.args_doc = "",
921
.doc = "Mandos client -- Get and decrypt"
922
" passwords from a Mandos server" };
923
ret = argp_parse(&argp, argc, argv, 0, 0, NULL);
924
if(ret == ARGP_ERR_UNKNOWN){
925
fprintf(stderr, "Unknown error while parsing arguments\n");
926
exitcode = EXIT_FAILURE;
1245
927
goto end;
1246
928
}
1247
929
}
1248
/* sleep checking until interface is running */
1249
for(int i=0; i < delay * 4; i++){
930
931
/* If the interface is down, bring it up */
932
{
933
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
934
if(sd < 0) {
935
perror("socket");
936
exitcode = EXIT_FAILURE;
937
goto end;
938
}
939
strcpy(network.ifr_name, interface);
1250
940
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1251
941
if(ret == -1){
1252
942
perror("ioctl SIOCGIFFLAGS");
1253
} else if(network.ifr_flags & IFF_RUNNING){
1254
break;
1255
}
1256
struct timespec sleeptime = { .tv_nsec = 250000000 };
1257
ret = nanosleep(&sleeptime, NULL);
1258
if(ret == -1 and errno != EINTR){
1259
perror("nanosleep");
1260
}
1261
}
1262
if(not take_down_interface){
1263
/* We won't need the socket anymore */
943
exitcode = EXIT_FAILURE;
944
goto end;
945
}
946
if((network.ifr_flags & IFF_UP) == 0){
947
network.ifr_flags |= IFF_UP;
948
ret = ioctl(sd, SIOCSIFFLAGS, &network);
949
if(ret == -1){
950
perror("ioctl SIOCSIFFLAGS");
951
exitcode = EXIT_FAILURE;
952
goto end;
953
}
954
}
1264
955
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1265
956
if(ret == -1){
1266
957
perror("close");
1267
958
}
1268
959
}
1269
#ifdef __linux__
1270
if(restore_loglevel){
1271
/* Restores kernel loglevel to default */
1272
ret = klogctl(7, NULL, 0);
1273
if(ret == -1){
1274
perror("klogctl");
1275
}
1276
}
1277
#endif /* __linux__ */
1278
}
1279
1280
if(quit_now){
1281
goto end;
1282
}
1283
1284
uid = getuid();
1285
gid = getgid();
1286
1287
errno = 0;
1288
setgid(gid);
1289
if(ret == -1){
1290
perror("setgid");
1291
}
1292
1293
ret = setuid(uid);
1294
if(ret == -1){
1295
perror("setuid");
1296
}
1297
1298
if(quit_now){
1299
goto end;
1300
}
1301
1302
ret = init_gnutls_global(pubkey, seckey);
1303
if(ret == -1){
1304
fprintf(stderr, "init_gnutls_global failed\n");
1305
exitcode = EXIT_FAILURE;
1306
goto end;
1307
} else {
1308
gnutls_initialized = true;
1309
}
1310
1311
if(quit_now){
1312
goto end;
1313
}
1314
1315
tempdir_created = true;
1316
if(mkdtemp(tempdir) == NULL){
1317
tempdir_created = false;
1318
perror("mkdtemp");
1319
goto end;
1320
}
1321
1322
if(quit_now){
1323
goto end;
1324
}
1325
1326
if(not init_gpgme(pubkey, seckey, tempdir)){
1327
fprintf(stderr, "init_gpgme failed\n");
1328
exitcode = EXIT_FAILURE;
1329
goto end;
1330
} else {
1331
gpgme_initialized = true;
1332
}
1333
1334
if(quit_now){
1335
goto end;
1336
}
1337
1338
if(connect_to != NULL){
1339
/* Connect directly, do not use Zeroconf */
1340
/* (Mainly meant for debugging) */
1341
char *address = strrchr(connect_to, ':');
1342
if(address == NULL){
1343
fprintf(stderr, "No colon in address\n");
1344
exitcode = EXIT_FAILURE;
1345
goto end;
1346
}
1347
1348
if(quit_now){
1349
goto end;
1350
}
1351
1352
uint16_t port;
1353
errno = 0;
1354
tmpmax = strtoimax(address+1, &tmp, 10);
1355
if(errno != 0 or tmp == address+1 or *tmp != '\0'
1356
or tmpmax != (uint16_t)tmpmax){
1357
fprintf(stderr, "Bad port number\n");
1358
exitcode = EXIT_FAILURE;
1359
goto end;
1360
}
1361
1362
if(quit_now){
1363
goto end;
1364
}
1365
1366
port = (uint16_t)tmpmax;
1367
*address = '\0';
1368
address = connect_to;
1369
/* Colon in address indicates IPv6 */
1370
int af;
1371
if(strchr(address, ':') != NULL){
1372
af = AF_INET6;
1373
} else {
1374
af = AF_INET;
1375
}
1376
1377
if(quit_now){
1378
goto end;
1379
}
1380
1381
ret = start_mandos_communication(address, port, if_index, af);
1382
if(ret < 0){
1383
exitcode = EXIT_FAILURE;
1384
} else {
1385
exitcode = EXIT_SUCCESS;
1386
}
1387
goto end;
1388
}
1389
1390
if(quit_now){
1391
goto end;
1392
}
1393
1394
{
1395
AvahiServerConfig config;
1396
/* Do not publish any local Zeroconf records */
1397
avahi_server_config_init(&config);
1398
config.publish_hinfo = 0;
1399
config.publish_addresses = 0;
1400
config.publish_workstation = 0;
1401
config.publish_domain = 0;
1402
1403
/* Allocate a new server */
1404
mc.server = avahi_server_new(avahi_simple_poll_get
1405
(mc.simple_poll), &config, NULL,
1406
NULL, &error);
1407
1408
/* Free the Avahi configuration data */
1409
avahi_server_config_free(&config);
1410
}
1411
1412
/* Check if creating the Avahi server object succeeded */
1413
if(mc.server == NULL){
1414
fprintf(stderr, "Failed to create Avahi server: %s\n",
1415
avahi_strerror(error));
1416
exitcode = EXIT_FAILURE;
1417
goto end;
1418
}
1419
1420
if(quit_now){
1421
goto end;
1422
}
1423
1424
/* Create the Avahi service browser */
1425
sb = avahi_s_service_browser_new(mc.server, if_index,
1426
AVAHI_PROTO_UNSPEC, "_mandos._tcp",
1427
NULL, 0, browse_callback, NULL);
1428
if(sb == NULL){
1429
fprintf(stderr, "Failed to create service browser: %s\n",
1430
avahi_strerror(avahi_server_errno(mc.server)));
1431
exitcode = EXIT_FAILURE;
1432
goto end;
1433
}
1434
1435
if(quit_now){
1436
goto end;
1437
}
1438
1439
/* Run the main loop */
1440
1441
if(debug){
1442
fprintf(stderr, "Starting Avahi loop search\n");
1443
}
1444
1445
avahi_simple_poll_loop(mc.simple_poll);
1446
960
961
uid = getuid();
962
gid = getgid();
963
964
ret = setuid(uid);
965
if(ret == -1){
966
perror("setuid");
967
}
968
969
setgid(gid);
970
if(ret == -1){
971
perror("setgid");
972
}
973
974
ret = init_gnutls_global(&mc, pubkey, seckey);
975
if(ret == -1){
976
fprintf(stderr, "init_gnutls_global failed\n");
977
exitcode = EXIT_FAILURE;
978
goto end;
979
} else {
980
gnutls_initialized = true;
981
}
982
983
if(mkdtemp(tempdir) == NULL){
984
perror("mkdtemp");
985
goto end;
986
}
987
tempdir_created = true;
988
989
if(not init_gpgme(&mc, pubkey, seckey, tempdir)){
990
fprintf(stderr, "init_gpgme failed\n");
991
exitcode = EXIT_FAILURE;
992
goto end;
993
} else {
994
gpgme_initialized = true;
995
}
996
997
if_index = (AvahiIfIndex) if_nametoindex(interface);
998
if(if_index == 0){
999
fprintf(stderr, "No such interface: \"%s\"\n", interface);
1000
exitcode = EXIT_FAILURE;
1001
goto end;
1002
}
1003
1004
if(connect_to != NULL){
1005
/* Connect directly, do not use Zeroconf */
1006
/* (Mainly meant for debugging) */
1007
char *address = strrchr(connect_to, ':');
1008
if(address == NULL){
1009
fprintf(stderr, "No colon in address\n");
1010
exitcode = EXIT_FAILURE;
1011
goto end;
1012
}
1013
uint16_t port;
1014
ret = sscanf(address+1, "%" SCNdMAX "%n", &tmpmax, &numchars);
1015
if(ret < 1 or tmpmax != (uint16_t)tmpmax
1016
or address[numchars+1] != '\0'){
1017
fprintf(stderr, "Bad port number\n");
1018
exitcode = EXIT_FAILURE;
1019
goto end;
1020
}
1021
port = (uint16_t)tmpmax;
1022
*address = '\0';
1023
address = connect_to;
1024
ret = start_mandos_communication(address, port, if_index, &mc);
1025
if(ret < 0){
1026
exitcode = EXIT_FAILURE;
1027
} else {
1028
exitcode = EXIT_SUCCESS;
1029
}
1030
goto end;
1031
}
1032
1033
if(not debug){
1034
avahi_set_log_function(empty_log);
1035
}
1036
1037
/* Initialize the pseudo-RNG for Avahi */
1038
srand((unsigned int) time(NULL));
1039
1040
/* Allocate main Avahi loop object */
1041
mc.simple_poll = avahi_simple_poll_new();
1042
if(mc.simple_poll == NULL) {
1043
fprintf(stderr, "Avahi: Failed to create simple poll"
1044
" object.\n");
1045
exitcode = EXIT_FAILURE;
1046
goto end;
1047
}
1048
1049
{
1050
AvahiServerConfig config;
1051
/* Do not publish any local Zeroconf records */
1052
avahi_server_config_init(&config);
1053
config.publish_hinfo = 0;
1054
config.publish_addresses = 0;
1055
config.publish_workstation = 0;
1056
config.publish_domain = 0;
1057
1058
/* Allocate a new server */
1059
mc.server = avahi_server_new(avahi_simple_poll_get
1060
(mc.simple_poll), &config, NULL,
1061
NULL, &error);
1062
1063
/* Free the Avahi configuration data */
1064
avahi_server_config_free(&config);
1065
}
1066
1067
/* Check if creating the Avahi server object succeeded */
1068
if(mc.server == NULL) {
1069
fprintf(stderr, "Failed to create Avahi server: %s\n",
1070
avahi_strerror(error));
1071
exitcode = EXIT_FAILURE;
1072
goto end;
1073
}
1074
1075
/* Create the Avahi service browser */
1076
sb = avahi_s_service_browser_new(mc.server, if_index,
1077
AVAHI_PROTO_INET6,
1078
"_mandos._tcp", NULL, 0,
1079
browse_callback, &mc);
1080
if(sb == NULL) {
1081
fprintf(stderr, "Failed to create service browser: %s\n",
1082
avahi_strerror(avahi_server_errno(mc.server)));
1083
exitcode = EXIT_FAILURE;
1084
goto end;
1085
}
1086
1087
/* Run the main loop */
1088
1089
if(debug){
1090
fprintf(stderr, "Starting Avahi loop search\n");
1091
}
1092
1093
avahi_simple_poll_loop(mc.simple_poll);
1094
1447
1095
end:
1448
1449
if(debug){
1450
fprintf(stderr, "%s exiting\n", argv[0]);
1451
}
1452
1453
/* Cleanup things */
1454
if(sb != NULL)
1455
avahi_s_service_browser_free(sb);
1456
1457
if(mc.server != NULL)
1458
avahi_server_free(mc.server);
1459
1460
if(mc.simple_poll != NULL)
1461
avahi_simple_poll_free(mc.simple_poll);
1462
1463
if(gnutls_initialized){
1464
gnutls_certificate_free_credentials(mc.cred);
1465
gnutls_global_deinit();
1466
gnutls_dh_params_deinit(mc.dh_params);
1467
}
1468
1469
if(gpgme_initialized){
1470
gpgme_release(mc.ctx);
1471
}
1472
1473
/* Take down the network interface */
1474
if(take_down_interface){
1475
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1476
if(ret == -1){
1477
perror("ioctl SIOCGIFFLAGS");
1478
} else if(network.ifr_flags & IFF_UP) {
1479
network.ifr_flags &= ~IFF_UP; /* clear flag */
1480
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1481
if(ret == -1){
1482
perror("ioctl SIOCSIFFLAGS");
1483
}
1484
}
1485
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1486
if(ret == -1){
1487
perror("close");
1488
}
1489
}
1490
1491
/* Removes the temp directory used by GPGME */
1492
if(tempdir_created){
1493
DIR *d;
1494
struct dirent *direntry;
1495
d = opendir(tempdir);
1496
if(d == NULL){
1497
if(errno != ENOENT){
1498
perror("opendir");
1499
}
1500
} else {
1501
while(true){
1502
direntry = readdir(d);
1503
if(direntry == NULL){
1504
break;
1505
}
1506
/* Skip "." and ".." */
1507
if(direntry->d_name[0] == '.'
1508
and (direntry->d_name[1] == '\0'
1509
or (direntry->d_name[1] == '.'
1510
and direntry->d_name[2] == '\0'))){
1511
continue;
1512
}
1513
char *fullname = NULL;
1514
ret = asprintf(&fullname, "%s/%s", tempdir,
1515
direntry->d_name);
1516
if(ret < 0){
1517
perror("asprintf");
1518
continue;
1519
}
1520
ret = remove(fullname);
1521
if(ret == -1){
1522
fprintf(stderr, "remove(\"%s\"): %s\n", fullname,
1523
strerror(errno));
1524
}
1525
free(fullname);
1526
}
1527
closedir(d);
1528
}
1529
ret = rmdir(tempdir);
1530
if(ret == -1 and errno != ENOENT){
1531
perror("rmdir");
1532
}
1533
}
1534
1535
if(quit_now){
1536
sigemptyset(&old_sigterm_action.sa_mask);
1537
old_sigterm_action.sa_handler = SIG_DFL;
1538
ret = sigaction(signal_received, &old_sigterm_action, NULL);
1539
if(ret == -1){
1540
perror("sigaction");
1541
}
1542
raise(signal_received);
1543
}
1544
1545
return exitcode;
1096
1097
if(debug){
1098
fprintf(stderr, "%s exiting\n", argv[0]);
1099
}
1100
1101
/* Cleanup things */
1102
if(sb != NULL)
1103
avahi_s_service_browser_free(sb);
1104
1105
if(mc.server != NULL)
1106
avahi_server_free(mc.server);
1107
1108
if(mc.simple_poll != NULL)
1109
avahi_simple_poll_free(mc.simple_poll);
1110
1111
if(gnutls_initialized){
1112
gnutls_certificate_free_credentials(mc.cred);
1113
gnutls_global_deinit();
1114
gnutls_dh_params_deinit(mc.dh_params);
1115
}
1116
1117
if(gpgme_initialized){
1118
gpgme_release(mc.ctx);
1119
}
1120
1121
/* Removes the temp directory used by GPGME */
1122
if(tempdir_created){
1123
DIR *d;
1124
struct dirent *direntry;
1125
d = opendir(tempdir);
1126
if(d == NULL){
1127
if(errno != ENOENT){
1128
perror("opendir");
1129
}
1130
} else {
1131
while(true){
1132
direntry = readdir(d);
1133
if(direntry == NULL){
1134
break;
1135
}
1136
/* Skip "." and ".." */
1137
if(direntry->d_name[0] == '.'
1138
and (direntry->d_name[1] == '\0'
1139
or (direntry->d_name[1] == '.'
1140
and direntry->d_name[2] == '\0'))){
1141
continue;
1142
}
1143
char *fullname = NULL;
1144
ret = asprintf(&fullname, "%s/%s", tempdir,
1145
direntry->d_name);
1146
if(ret < 0){
1147
perror("asprintf");
1148
continue;
1149
}
1150
ret = remove(fullname);
1151
if(ret == -1){
1152
fprintf(stderr, "remove(\"%s\"): %s\n", fullname,
1153
strerror(errno));
1154
}
1155
free(fullname);
1156
}
1157
closedir(d);
1158
}
1159
ret = rmdir(tempdir);
1160
if(ret == -1 and errno != ENOENT){
1161
perror("rmdir");
1162
}
1163
}
1164
1165
return exitcode;
1546
1166
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0