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- Committer: Teddy Hogeborn
- Date: 2009-01-27 00:07:26 UTC
- Revision ID: teddy@fukt.bsnet.se-20090127000726-4cafcfy35g8kh2b8
* INSTALL (Prerequisites/Mandos Server): Added "PyGObject".
- 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){
151
int ret;
167
152
gpgme_error_t rc;
168
153
gpgme_engine_info_t engine_info;
169
154
170
155
171
156
/*
172
* Helper function to insert pub and seckey to the engine keyring.
157
* Helper function to insert pub and seckey to the enigne keyring.
173
158
*/
174
159
bool import_key(const char *filename){
175
int ret;
176
160
int fd;
177
161
gpgme_data_t pgp_data;
178
162
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;
533
516
size_t buffer_capacity = 0;
517
ssize_t decrypted_buffer_size;
534
518
size_t written;
535
519
int retval = 0;
520
char interface[IF_NAMESIZE];
536
521
gnutls_session_t session;
537
int pf; /* Protocol family */
538
539
if(quit_now){
540
return -1;
541
}
542
543
switch(af){
544
case AF_INET6:
545
pf = PF_INET6;
546
break;
547
case AF_INET:
548
pf = PF_INET;
549
break;
550
default:
551
fprintf(stderr, "Bad address family: %d\n", af);
552
return -1;
553
}
554
555
ret = init_gnutls_session(&session);
522
523
ret = init_gnutls_session(mc, &session);
556
524
if(ret != 0){
557
525
return -1;
558
526
}
559
527
560
528
if(debug){
561
fprintf(stderr, "Setting up a TCP connection to %s, port %" PRIu16
529
fprintf(stderr, "Setting up a tcp connection to %s, port %" PRIu16
562
530
"\n", ip, port);
563
531
}
564
532
565
tcp_sd = socket(pf, SOCK_STREAM, 0);
566
if(tcp_sd < 0){
533
tcp_sd = socket(PF_INET6, SOCK_STREAM, 0);
534
if(tcp_sd < 0) {
567
535
perror("socket");
568
retval = -1;
569
goto mandos_end;
536
return -1;
570
537
}
571
538
572
if(quit_now){
573
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);
574
545
}
575
546
576
547
memset(&to, 0, sizeof(to));
577
if(af == AF_INET6){
578
to.in6.sin6_family = (sa_family_t)af;
579
ret = inet_pton(af, ip, &to.in6.sin6_addr);
580
} else { /* IPv4 */
581
to.in.sin_family = (sa_family_t)af;
582
ret = inet_pton(af, ip, &to.in.sin_addr);
583
}
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);
584
552
if(ret < 0 ){
585
553
perror("inet_pton");
586
retval = -1;
587
goto mandos_end;
554
return -1;
588
555
}
589
556
if(ret == 0){
590
557
fprintf(stderr, "Bad address: %s\n", ip);
591
retval = -1;
592
goto mandos_end;
558
return -1;
593
559
}
594
if(af == AF_INET6){
595
to.in6.sin6_port = htons(port); /* Spurious warnings from
596
-Wconversion and
597
-Wunreachable-code */
598
599
if(IN6_IS_ADDR_LINKLOCAL /* Spurious warnings from */
600
(&to.in6.sin6_addr)){ /* -Wstrict-aliasing=2 or lower and
601
-Wunreachable-code*/
602
if(if_index == AVAHI_IF_UNSPEC){
603
fprintf(stderr, "An IPv6 link-local address is incomplete"
604
" without a network interface\n");
605
retval = -1;
606
goto mandos_end;
607
}
608
/* Set the network interface number as scope */
609
to.in6.sin6_scope_id = (uint32_t)if_index;
610
}
611
} else {
612
to.in.sin_port = htons(port); /* Spurious warnings from
560
to.in6.sin6_port = htons(port); /* Spurious warnings from
613
561
-Wconversion and
614
562
-Wunreachable-code */
615
}
616
563
617
if(quit_now){
618
goto mandos_end;
619
}
564
to.in6.sin6_scope_id = (uint32_t)if_index;
620
565
621
566
if(debug){
622
if(af == AF_INET6 and if_index != AVAHI_IF_UNSPEC){
623
char interface[IF_NAMESIZE];
624
if(if_indextoname((unsigned int)if_index, interface) == NULL){
625
perror("if_indextoname");
626
} else {
627
fprintf(stderr, "Connection to: %s%%%s, port %" PRIu16 "\n",
628
ip, interface, port);
629
}
630
} else {
631
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
632
port);
633
}
634
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
635
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
636
const char *pcret;
637
if(af == AF_INET6){
638
pcret = inet_ntop(af, &(to.in6.sin6_addr), addrstr,
639
sizeof(addrstr));
640
} else {
641
pcret = inet_ntop(af, &(to.in.sin_addr), addrstr,
642
sizeof(addrstr));
643
}
644
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){
645
572
perror("inet_ntop");
646
573
} else {
647
574
if(strcmp(addrstr, ip) != 0){
650
577
}
651
578
}
652
579
653
if(quit_now){
654
goto mandos_end;
655
}
656
657
if(af == AF_INET6){
658
ret = connect(tcp_sd, &to.in6, sizeof(to));
659
} else {
660
ret = connect(tcp_sd, &to.in, sizeof(to)); /* IPv4 */
661
}
580
ret = connect(tcp_sd, &to.in, sizeof(to));
662
581
if(ret < 0){
663
582
perror("connect");
664
retval = -1;
665
goto mandos_end;
666
}
667
668
if(quit_now){
669
goto mandos_end;
583
return -1;
670
584
}
671
585
672
586
const char *out = mandos_protocol_version;
691
605
break;
692
606
}
693
607
}
694
695
if(quit_now){
696
goto mandos_end;
697
}
698
608
}
699
609
700
610
if(debug){
701
611
fprintf(stderr, "Establishing TLS session with %s\n", ip);
702
612
}
703
613
704
if(quit_now){
705
goto mandos_end;
706
}
707
708
614
gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t) tcp_sd);
709
615
710
if(quit_now){
711
goto mandos_end;
712
}
713
714
do {
616
do{
715
617
ret = gnutls_handshake(session);
716
if(quit_now){
717
goto mandos_end;
718
}
719
618
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
720
619
721
620
if(ret != GNUTLS_E_SUCCESS){
730
629
/* Read OpenPGP packet that contains the wanted password */
731
630
732
631
if(debug){
733
fprintf(stderr, "Retrieving OpenPGP encrypted password from %s\n",
632
fprintf(stderr, "Retrieving pgp encrypted password from %s\n",
734
633
ip);
735
634
}
736
635
737
636
while(true){
738
739
if(quit_now){
740
goto mandos_end;
741
}
742
743
buffer_capacity = incbuffer(&buffer, buffer_length,
637
buffer_capacity = adjustbuffer(&buffer, buffer_length,
744
638
buffer_capacity);
745
639
if(buffer_capacity == 0){
746
perror("incbuffer");
640
perror("adjustbuffer");
747
641
retval = -1;
748
642
goto mandos_end;
749
643
}
750
644
751
if(quit_now){
752
goto mandos_end;
753
}
754
755
645
sret = gnutls_record_recv(session, buffer+buffer_length,
756
646
BUFFER_SIZE);
757
647
if(sret == 0){
763
653
case GNUTLS_E_AGAIN:
764
654
break;
765
655
case GNUTLS_E_REHANDSHAKE:
766
do {
656
do{
767
657
ret = gnutls_handshake(session);
768
769
if(quit_now){
770
goto mandos_end;
771
}
772
658
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
773
659
if(ret < 0){
774
660
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
793
679
fprintf(stderr, "Closing TLS session\n");
794
680
}
795
681
796
if(quit_now){
797
goto mandos_end;
798
}
799
800
682
gnutls_bye(session, GNUTLS_SHUT_RDWR);
801
683
802
if(quit_now){
803
goto mandos_end;
804
}
805
806
684
if(buffer_length > 0){
807
ssize_t decrypted_buffer_size;
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
813
689
written = 0;
814
690
while(written < (size_t) decrypted_buffer_size){
815
if(quit_now){
816
goto mandos_end;
817
}
818
819
691
ret = (int)fwrite(decrypted_buffer + written, 1,
820
692
(size_t)decrypted_buffer_size - written,
821
693
stdout);
841
713
842
714
mandos_end:
843
715
free(buffer);
844
if(tcp_sd >= 0){
845
ret = (int)TEMP_FAILURE_RETRY(close(tcp_sd));
846
}
716
ret = (int)TEMP_FAILURE_RETRY(close(tcp_sd));
847
717
if(ret == -1){
848
718
perror("close");
849
719
}
850
720
gnutls_deinit(session);
851
if(quit_now){
852
retval = -1;
853
}
854
721
return retval;
855
722
}
856
723
857
724
static void resolve_callback(AvahiSServiceResolver *r,
858
725
AvahiIfIndex interface,
859
AvahiProtocol proto,
726
AVAHI_GCC_UNUSED AvahiProtocol protocol,
860
727
AvahiResolverEvent event,
861
728
const char *name,
862
729
const char *type,
867
734
AVAHI_GCC_UNUSED AvahiStringList *txt,
868
735
AVAHI_GCC_UNUSED AvahiLookupResultFlags
869
736
flags,
870
AVAHI_GCC_UNUSED void* userdata){
737
void* userdata) {
738
mandos_context *mc = userdata;
871
739
assert(r);
872
740
873
741
/* Called whenever a service has been resolved successfully or
874
742
timed out */
875
743
876
if(quit_now){
877
return;
878
}
879
880
switch(event){
744
switch(event) {
881
745
default:
882
746
case AVAHI_RESOLVER_FAILURE:
883
747
fprintf(stderr, "(Avahi Resolver) Failed to resolve service '%s'"
884
748
" of type '%s' in domain '%s': %s\n", name, type, domain,
885
avahi_strerror(avahi_server_errno(mc.server)));
749
avahi_strerror(avahi_server_errno(mc->server)));
886
750
break;
887
751
888
752
case AVAHI_RESOLVER_FOUND:
894
758
PRIdMAX ") on port %" PRIu16 "\n", name, host_name,
895
759
ip, (intmax_t)interface, port);
896
760
}
897
int ret = start_mandos_communication(ip, port, interface,
898
avahi_proto_to_af(proto));
761
int ret = start_mandos_communication(ip, port, interface, mc);
899
762
if(ret == 0){
900
avahi_simple_poll_quit(mc.simple_poll);
763
avahi_simple_poll_quit(mc->simple_poll);
901
764
}
902
765
}
903
766
}
904
767
avahi_s_service_resolver_free(r);
905
768
}
906
769
907
static void browse_callback(AvahiSServiceBrowser *b,
908
AvahiIfIndex interface,
909
AvahiProtocol protocol,
910
AvahiBrowserEvent event,
911
const char *name,
912
const char *type,
913
const char *domain,
914
AVAHI_GCC_UNUSED AvahiLookupResultFlags
915
flags,
916
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;
917
781
assert(b);
918
782
919
783
/* Called whenever a new services becomes available on the LAN or
920
784
is removed from the LAN */
921
785
922
if(quit_now){
923
return;
924
}
925
926
switch(event){
786
switch(event) {
927
787
default:
928
788
case AVAHI_BROWSER_FAILURE:
929
789
930
790
fprintf(stderr, "(Avahi browser) %s\n",
931
avahi_strerror(avahi_server_errno(mc.server)));
932
avahi_simple_poll_quit(mc.simple_poll);
791
avahi_strerror(avahi_server_errno(mc->server)));
792
avahi_simple_poll_quit(mc->simple_poll);
933
793
return;
934
794
935
795
case AVAHI_BROWSER_NEW:
938
798
the callback function is called the Avahi server will free the
939
799
resolver for us. */
940
800
941
if(avahi_s_service_resolver_new(mc.server, interface, protocol,
942
name, type, domain, protocol, 0,
943
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)))
944
805
fprintf(stderr, "Avahi: Failed to resolve service '%s': %s\n",
945
name, avahi_strerror(avahi_server_errno(mc.server)));
806
name, avahi_strerror(avahi_server_errno(mc->server)));
946
807
break;
947
808
948
809
case AVAHI_BROWSER_REMOVE:
957
818
}
958
819
}
959
820
960
/* stop main loop after sigterm has been called */
961
static void handle_sigterm(int sig){
962
if(quit_now){
963
return;
964
}
965
quit_now = 1;
966
signal_received = sig;
967
int old_errno = errno;
968
if(mc.simple_poll != NULL){
969
avahi_simple_poll_quit(mc.simple_poll);
970
}
971
errno = old_errno;
972
}
973
974
821
int main(int argc, char *argv[]){
975
AvahiSServiceBrowser *sb = NULL;
976
int error;
977
int ret;
978
intmax_t tmpmax;
979
char *tmp;
980
int exitcode = EXIT_SUCCESS;
981
const char *interface = "eth0";
982
struct ifreq network;
983
int sd = -1;
984
bool take_down_interface = false;
985
uid_t uid;
986
gid_t gid;
987
char *connect_to = NULL;
988
char tempdir[] = "/tmp/mandosXXXXXX";
989
bool tempdir_created = false;
990
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
991
const char *seckey = PATHDIR "/" SECKEY;
992
const char *pubkey = PATHDIR "/" PUBKEY;
993
994
bool gnutls_initialized = false;
995
bool gpgme_initialized = false;
996
float delay = 2.5f;
997
998
struct sigaction old_sigterm_action;
999
struct sigaction sigterm_action = { .sa_handler = handle_sigterm };
1000
1001
{
1002
struct argp_option options[] = {
1003
{ .name = "debug", .key = 128,
1004
.doc = "Debug mode", .group = 3 },
1005
{ .name = "connect", .key = 'c',
1006
.arg = "ADDRESS:PORT",
1007
.doc = "Connect directly to a specific Mandos server",
1008
.group = 1 },
1009
{ .name = "interface", .key = 'i',
1010
.arg = "NAME",
1011
.doc = "Network interface that will be used to search for"
1012
" Mandos servers",
1013
.group = 1 },
1014
{ .name = "seckey", .key = 's',
1015
.arg = "FILE",
1016
.doc = "OpenPGP secret key file base name",
1017
.group = 1 },
1018
{ .name = "pubkey", .key = 'p',
1019
.arg = "FILE",
1020
.doc = "OpenPGP public key file base name",
1021
.group = 2 },
1022
{ .name = "dh-bits", .key = 129,
1023
.arg = "BITS",
1024
.doc = "Bit length of the prime number used in the"
1025
" Diffie-Hellman key exchange",
1026
.group = 2 },
1027
{ .name = "priority", .key = 130,
1028
.arg = "STRING",
1029
.doc = "GnuTLS priority string for the TLS handshake",
1030
.group = 1 },
1031
{ .name = "delay", .key = 131,
1032
.arg = "SECONDS",
1033
.doc = "Maximum delay to wait for interface startup",
1034
.group = 2 },
1035
{ .name = NULL }
1036
};
1037
1038
error_t parse_opt(int key, char *arg,
1039
struct argp_state *state){
1040
switch(key){
1041
case 128: /* --debug */
1042
debug = true;
1043
break;
1044
case 'c': /* --connect */
1045
connect_to = arg;
1046
break;
1047
case 'i': /* --interface */
1048
interface = arg;
1049
break;
1050
case 's': /* --seckey */
1051
seckey = arg;
1052
break;
1053
case 'p': /* --pubkey */
1054
pubkey = arg;
1055
break;
1056
case 129: /* --dh-bits */
1057
errno = 0;
1058
tmpmax = strtoimax(arg, &tmp, 10);
1059
if(errno != 0 or tmp == arg or *tmp != '\0'
1060
or tmpmax != (typeof(mc.dh_bits))tmpmax){
1061
fprintf(stderr, "Bad number of DH bits\n");
1062
exit(EXIT_FAILURE);
1063
}
1064
mc.dh_bits = (typeof(mc.dh_bits))tmpmax;
1065
break;
1066
case 130: /* --priority */
1067
mc.priority = arg;
1068
break;
1069
case 131: /* --delay */
1070
errno = 0;
1071
delay = strtof(arg, &tmp);
1072
if(errno != 0 or tmp == arg or *tmp != '\0'){
1073
fprintf(stderr, "Bad delay\n");
1074
exit(EXIT_FAILURE);
1075
}
1076
break;
1077
case ARGP_KEY_ARG:
1078
argp_usage(state);
1079
case ARGP_KEY_END:
1080
break;
1081
default:
1082
return ARGP_ERR_UNKNOWN;
1083
}
1084
return 0;
1085
}
1086
1087
struct argp argp = { .options = options, .parser = parse_opt,
1088
.args_doc = "",
1089
.doc = "Mandos client -- Get and decrypt"
1090
" passwords from a Mandos server" };
1091
ret = argp_parse(&argp, argc, argv, 0, 0, NULL);
1092
if(ret == ARGP_ERR_UNKNOWN){
1093
fprintf(stderr, "Unknown error while parsing arguments\n");
1094
exitcode = EXIT_FAILURE;
1095
goto end;
1096
}
1097
}
1098
1099
if(not debug){
1100
avahi_set_log_function(empty_log);
1101
}
1102
1103
/* Initialize Avahi early so avahi_simple_poll_quit() can be called
1104
from the signal handler */
1105
/* Initialize the pseudo-RNG for Avahi */
1106
srand((unsigned int) time(NULL));
1107
mc.simple_poll = avahi_simple_poll_new();
1108
if(mc.simple_poll == NULL){
1109
fprintf(stderr, "Avahi: Failed to create simple poll object.\n");
1110
exitcode = EXIT_FAILURE;
1111
goto end;
1112
}
1113
1114
sigemptyset(&sigterm_action.sa_mask);
1115
ret = sigaddset(&sigterm_action.sa_mask, SIGINT);
1116
if(ret == -1){
1117
perror("sigaddset");
1118
exitcode = EXIT_FAILURE;
1119
goto end;
1120
}
1121
ret = sigaddset(&sigterm_action.sa_mask, SIGHUP);
1122
if(ret == -1){
1123
perror("sigaddset");
1124
exitcode = EXIT_FAILURE;
1125
goto end;
1126
}
1127
ret = sigaddset(&sigterm_action.sa_mask, SIGTERM);
1128
if(ret == -1){
1129
perror("sigaddset");
1130
exitcode = EXIT_FAILURE;
1131
goto end;
1132
}
1133
/* Need to check if the handler is SIG_IGN before handling:
1134
| [[info:libc:Initial Signal Actions]] |
1135
| [[info:libc:Basic Signal Handling]] |
1136
*/
1137
ret = sigaction(SIGINT, NULL, &old_sigterm_action);
1138
if(ret == -1){
1139
perror("sigaction");
1140
return EXIT_FAILURE;
1141
}
1142
if(old_sigterm_action.sa_handler != SIG_IGN){
1143
ret = sigaction(SIGINT, &sigterm_action, NULL);
1144
if(ret == -1){
1145
perror("sigaction");
1146
exitcode = EXIT_FAILURE;
1147
goto end;
1148
}
1149
}
1150
ret = sigaction(SIGHUP, NULL, &old_sigterm_action);
1151
if(ret == -1){
1152
perror("sigaction");
1153
return EXIT_FAILURE;
1154
}
1155
if(old_sigterm_action.sa_handler != SIG_IGN){
1156
ret = sigaction(SIGHUP, &sigterm_action, NULL);
1157
if(ret == -1){
1158
perror("sigaction");
1159
exitcode = EXIT_FAILURE;
1160
goto end;
1161
}
1162
}
1163
ret = sigaction(SIGTERM, NULL, &old_sigterm_action);
1164
if(ret == -1){
1165
perror("sigaction");
1166
return EXIT_FAILURE;
1167
}
1168
if(old_sigterm_action.sa_handler != SIG_IGN){
1169
ret = sigaction(SIGTERM, &sigterm_action, NULL);
1170
if(ret == -1){
1171
perror("sigaction");
1172
exitcode = EXIT_FAILURE;
1173
goto end;
1174
}
1175
}
1176
1177
/* If the interface is down, bring it up */
1178
if(interface[0] != '\0'){
1179
if_index = (AvahiIfIndex) if_nametoindex(interface);
1180
if(if_index == 0){
1181
fprintf(stderr, "No such interface: \"%s\"\n", interface);
1182
exitcode = EXIT_FAILURE;
1183
goto end;
1184
}
1185
1186
if(quit_now){
1187
goto end;
1188
}
1189
1190
#ifdef __linux__
1191
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1192
messages to mess up the prompt */
1193
ret = klogctl(8, NULL, 5);
1194
bool restore_loglevel = true;
1195
if(ret == -1){
1196
restore_loglevel = false;
1197
perror("klogctl");
1198
}
1199
#endif /* __linux__ */
1200
1201
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1202
if(sd < 0){
1203
perror("socket");
1204
exitcode = EXIT_FAILURE;
1205
#ifdef __linux__
1206
if(restore_loglevel){
1207
ret = klogctl(7, NULL, 0);
1208
if(ret == -1){
1209
perror("klogctl");
1210
}
1211
}
1212
#endif /* __linux__ */
1213
goto end;
1214
}
1215
strcpy(network.ifr_name, interface);
1216
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1217
if(ret == -1){
1218
perror("ioctl SIOCGIFFLAGS");
1219
#ifdef __linux__
1220
if(restore_loglevel){
1221
ret = klogctl(7, NULL, 0);
1222
if(ret == -1){
1223
perror("klogctl");
1224
}
1225
}
1226
#endif /* __linux__ */
1227
exitcode = EXIT_FAILURE;
1228
goto end;
1229
}
1230
if((network.ifr_flags & IFF_UP) == 0){
1231
network.ifr_flags |= IFF_UP;
1232
take_down_interface = true;
1233
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1234
if(ret == -1){
1235
take_down_interface = false;
1236
perror("ioctl SIOCSIFFLAGS");
1237
exitcode = EXIT_FAILURE;
1238
#ifdef __linux__
1239
if(restore_loglevel){
1240
ret = klogctl(7, NULL, 0);
1241
if(ret == -1){
1242
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
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
836
const char *seckey = PATHDIR "/" SECKEY;
837
const char *pubkey = PATHDIR "/" PUBKEY;
838
839
mandos_context mc = { .simple_poll = NULL, .server = NULL,
840
.dh_bits = 1024, .priority = "SECURE256"
841
":!CTYPE-X.509:+CTYPE-OPENPGP" };
842
bool gnutls_initialized = false;
843
bool gpgme_initialized = false;
844
845
{
846
struct argp_option options[] = {
847
{ .name = "debug", .key = 128,
848
.doc = "Debug mode", .group = 3 },
849
{ .name = "connect", .key = 'c',
850
.arg = "ADDRESS:PORT",
851
.doc = "Connect directly to a specific Mandos server",
852
.group = 1 },
853
{ .name = "interface", .key = 'i',
854
.arg = "NAME",
855
.doc = "Interface that will be used to search for Mandos"
856
" servers",
857
.group = 1 },
858
{ .name = "seckey", .key = 's',
859
.arg = "FILE",
860
.doc = "OpenPGP secret key file base name",
861
.group = 1 },
862
{ .name = "pubkey", .key = 'p',
863
.arg = "FILE",
864
.doc = "OpenPGP public key file base name",
865
.group = 2 },
866
{ .name = "dh-bits", .key = 129,
867
.arg = "BITS",
868
.doc = "Bit length of the prime number used in the"
869
" Diffie-Hellman key exchange",
870
.group = 2 },
871
{ .name = "priority", .key = 130,
872
.arg = "STRING",
873
.doc = "GnuTLS priority string for the TLS handshake",
874
.group = 1 },
875
{ .name = NULL }
876
};
877
878
error_t parse_opt(int key, char *arg,
879
struct argp_state *state) {
880
switch(key) {
881
case 128: /* --debug */
882
debug = true;
883
break;
884
case 'c': /* --connect */
885
connect_to = arg;
886
break;
887
case 'i': /* --interface */
888
interface = arg;
889
break;
890
case 's': /* --seckey */
891
seckey = arg;
892
break;
893
case 'p': /* --pubkey */
894
pubkey = arg;
895
break;
896
case 129: /* --dh-bits */
897
ret = sscanf(arg, "%" SCNdMAX "%n", &tmpmax, &numchars);
898
if(ret < 1 or tmpmax != (typeof(mc.dh_bits))tmpmax
899
or arg[numchars] != '\0'){
900
fprintf(stderr, "Bad number of DH bits\n");
901
exit(EXIT_FAILURE);
1243
902
}
903
mc.dh_bits = (typeof(mc.dh_bits))tmpmax;
904
break;
905
case 130: /* --priority */
906
mc.priority = arg;
907
break;
908
case ARGP_KEY_ARG:
909
argp_usage(state);
910
case ARGP_KEY_END:
911
break;
912
default:
913
return ARGP_ERR_UNKNOWN;
1244
914
}
1245
#endif /* __linux__ */
915
return 0;
916
}
917
918
struct argp argp = { .options = options, .parser = parse_opt,
919
.args_doc = "",
920
.doc = "Mandos client -- Get and decrypt"
921
" passwords from a Mandos server" };
922
ret = argp_parse(&argp, argc, argv, 0, 0, NULL);
923
if(ret == ARGP_ERR_UNKNOWN){
924
fprintf(stderr, "Unknown error while parsing arguments\n");
925
exitcode = EXIT_FAILURE;
1246
926
goto end;
1247
927
}
1248
928
}
1249
/* sleep checking until interface is running */
1250
for(int i=0; i < delay * 4; i++){
929
930
/* If the interface is down, bring it up */
931
{
932
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
933
if(sd < 0) {
934
perror("socket");
935
exitcode = EXIT_FAILURE;
936
goto end;
937
}
938
strcpy(network.ifr_name, interface);
1251
939
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1252
940
if(ret == -1){
1253
941
perror("ioctl SIOCGIFFLAGS");
1254
} else if(network.ifr_flags & IFF_RUNNING){
1255
break;
1256
}
1257
struct timespec sleeptime = { .tv_nsec = 250000000 };
1258
ret = nanosleep(&sleeptime, NULL);
1259
if(ret == -1 and errno != EINTR){
1260
perror("nanosleep");
1261
}
1262
}
1263
if(not take_down_interface){
1264
/* We won't need the socket anymore */
942
exitcode = EXIT_FAILURE;
943
goto end;
944
}
945
if((network.ifr_flags & IFF_UP) == 0){
946
network.ifr_flags |= IFF_UP;
947
ret = ioctl(sd, SIOCSIFFLAGS, &network);
948
if(ret == -1){
949
perror("ioctl SIOCSIFFLAGS");
950
exitcode = EXIT_FAILURE;
951
goto end;
952
}
953
}
1265
954
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1266
955
if(ret == -1){
1267
956
perror("close");
1268
957
}
1269
958
}
1270
#ifdef __linux__
1271
if(restore_loglevel){
1272
/* Restores kernel loglevel to default */
1273
ret = klogctl(7, NULL, 0);
1274
if(ret == -1){
1275
perror("klogctl");
1276
}
1277
}
1278
#endif /* __linux__ */
1279
}
1280
1281
if(quit_now){
1282
goto end;
1283
}
1284
1285
uid = getuid();
1286
gid = getgid();
1287
1288
errno = 0;
1289
setgid(gid);
1290
if(ret == -1){
1291
perror("setgid");
1292
}
1293
1294
ret = setuid(uid);
1295
if(ret == -1){
1296
perror("setuid");
1297
}
1298
1299
if(quit_now){
1300
goto end;
1301
}
1302
1303
ret = init_gnutls_global(pubkey, seckey);
1304
if(ret == -1){
1305
fprintf(stderr, "init_gnutls_global failed\n");
1306
exitcode = EXIT_FAILURE;
1307
goto end;
1308
} else {
1309
gnutls_initialized = true;
1310
}
1311
1312
if(quit_now){
1313
goto end;
1314
}
1315
1316
tempdir_created = true;
1317
if(mkdtemp(tempdir) == NULL){
1318
tempdir_created = false;
1319
perror("mkdtemp");
1320
goto end;
1321
}
1322
1323
if(quit_now){
1324
goto end;
1325
}
1326
1327
if(not init_gpgme(pubkey, seckey, tempdir)){
1328
fprintf(stderr, "init_gpgme failed\n");
1329
exitcode = EXIT_FAILURE;
1330
goto end;
1331
} else {
1332
gpgme_initialized = true;
1333
}
1334
1335
if(quit_now){
1336
goto end;
1337
}
1338
1339
if(connect_to != NULL){
1340
/* Connect directly, do not use Zeroconf */
1341
/* (Mainly meant for debugging) */
1342
char *address = strrchr(connect_to, ':');
1343
if(address == NULL){
1344
fprintf(stderr, "No colon in address\n");
1345
exitcode = EXIT_FAILURE;
1346
goto end;
1347
}
1348
1349
if(quit_now){
1350
goto end;
1351
}
1352
1353
uint16_t port;
1354
errno = 0;
1355
tmpmax = strtoimax(address+1, &tmp, 10);
1356
if(errno != 0 or tmp == address+1 or *tmp != '\0'
1357
or tmpmax != (uint16_t)tmpmax){
1358
fprintf(stderr, "Bad port number\n");
1359
exitcode = EXIT_FAILURE;
1360
goto end;
1361
}
1362
1363
if(quit_now){
1364
goto end;
1365
}
1366
1367
port = (uint16_t)tmpmax;
1368
*address = '\0';
1369
address = connect_to;
1370
/* Colon in address indicates IPv6 */
1371
int af;
1372
if(strchr(address, ':') != NULL){
1373
af = AF_INET6;
1374
} else {
1375
af = AF_INET;
1376
}
1377
1378
if(quit_now){
1379
goto end;
1380
}
1381
1382
ret = start_mandos_communication(address, port, if_index, af);
1383
if(ret < 0){
1384
exitcode = EXIT_FAILURE;
1385
} else {
1386
exitcode = EXIT_SUCCESS;
1387
}
1388
goto end;
1389
}
1390
1391
if(quit_now){
1392
goto end;
1393
}
1394
1395
{
1396
AvahiServerConfig config;
1397
/* Do not publish any local Zeroconf records */
1398
avahi_server_config_init(&config);
1399
config.publish_hinfo = 0;
1400
config.publish_addresses = 0;
1401
config.publish_workstation = 0;
1402
config.publish_domain = 0;
1403
1404
/* Allocate a new server */
1405
mc.server = avahi_server_new(avahi_simple_poll_get
1406
(mc.simple_poll), &config, NULL,
1407
NULL, &error);
1408
1409
/* Free the Avahi configuration data */
1410
avahi_server_config_free(&config);
1411
}
1412
1413
/* Check if creating the Avahi server object succeeded */
1414
if(mc.server == NULL){
1415
fprintf(stderr, "Failed to create Avahi server: %s\n",
1416
avahi_strerror(error));
1417
exitcode = EXIT_FAILURE;
1418
goto end;
1419
}
1420
1421
if(quit_now){
1422
goto end;
1423
}
1424
1425
/* Create the Avahi service browser */
1426
sb = avahi_s_service_browser_new(mc.server, if_index,
1427
AVAHI_PROTO_UNSPEC, "_mandos._tcp",
1428
NULL, 0, browse_callback, NULL);
1429
if(sb == NULL){
1430
fprintf(stderr, "Failed to create service browser: %s\n",
1431
avahi_strerror(avahi_server_errno(mc.server)));
1432
exitcode = EXIT_FAILURE;
1433
goto end;
1434
}
1435
1436
if(quit_now){
1437
goto end;
1438
}
1439
1440
/* Run the main loop */
1441
1442
if(debug){
1443
fprintf(stderr, "Starting Avahi loop search\n");
1444
}
1445
1446
avahi_simple_poll_loop(mc.simple_poll);
1447
959
960
uid = getuid();
961
gid = getgid();
962
963
ret = setuid(uid);
964
if(ret == -1){
965
perror("setuid");
966
}
967
968
setgid(gid);
969
if(ret == -1){
970
perror("setgid");
971
}
972
973
ret = init_gnutls_global(&mc, pubkey, seckey);
974
if(ret == -1){
975
fprintf(stderr, "init_gnutls_global failed\n");
976
exitcode = EXIT_FAILURE;
977
goto end;
978
} else {
979
gnutls_initialized = true;
980
}
981
982
if(mkdtemp(tempdir) == NULL){
983
perror("mkdtemp");
984
tempdir[0] = '\0';
985
goto end;
986
}
987
988
if(not init_gpgme(&mc, pubkey, seckey, tempdir)){
989
fprintf(stderr, "init_gpgme failed\n");
990
exitcode = EXIT_FAILURE;
991
goto end;
992
} else {
993
gpgme_initialized = true;
994
}
995
996
if_index = (AvahiIfIndex) if_nametoindex(interface);
997
if(if_index == 0){
998
fprintf(stderr, "No such interface: \"%s\"\n", interface);
999
exit(EXIT_FAILURE);
1000
}
1001
1002
if(connect_to != NULL){
1003
/* Connect directly, do not use Zeroconf */
1004
/* (Mainly meant for debugging) */
1005
char *address = strrchr(connect_to, ':');
1006
if(address == NULL){
1007
fprintf(stderr, "No colon in address\n");
1008
exitcode = EXIT_FAILURE;
1009
goto end;
1010
}
1011
uint16_t port;
1012
ret = sscanf(address+1, "%" SCNdMAX "%n", &tmpmax, &numchars);
1013
if(ret < 1 or tmpmax != (uint16_t)tmpmax
1014
or address[numchars+1] != '\0'){
1015
fprintf(stderr, "Bad port number\n");
1016
exitcode = EXIT_FAILURE;
1017
goto end;
1018
}
1019
port = (uint16_t)tmpmax;
1020
*address = '\0';
1021
address = connect_to;
1022
ret = start_mandos_communication(address, port, if_index, &mc);
1023
if(ret < 0){
1024
exitcode = EXIT_FAILURE;
1025
} else {
1026
exitcode = EXIT_SUCCESS;
1027
}
1028
goto end;
1029
}
1030
1031
if(not debug){
1032
avahi_set_log_function(empty_log);
1033
}
1034
1035
/* Initialize the pseudo-RNG for Avahi */
1036
srand((unsigned int) time(NULL));
1037
1038
/* Allocate main Avahi loop object */
1039
mc.simple_poll = avahi_simple_poll_new();
1040
if(mc.simple_poll == NULL) {
1041
fprintf(stderr, "Avahi: Failed to create simple poll"
1042
" object.\n");
1043
exitcode = EXIT_FAILURE;
1044
goto end;
1045
}
1046
1047
{
1048
AvahiServerConfig config;
1049
/* Do not publish any local Zeroconf records */
1050
avahi_server_config_init(&config);
1051
config.publish_hinfo = 0;
1052
config.publish_addresses = 0;
1053
config.publish_workstation = 0;
1054
config.publish_domain = 0;
1055
1056
/* Allocate a new server */
1057
mc.server = avahi_server_new(avahi_simple_poll_get
1058
(mc.simple_poll), &config, NULL,
1059
NULL, &error);
1060
1061
/* Free the Avahi configuration data */
1062
avahi_server_config_free(&config);
1063
}
1064
1065
/* Check if creating the Avahi server object succeeded */
1066
if(mc.server == NULL) {
1067
fprintf(stderr, "Failed to create Avahi server: %s\n",
1068
avahi_strerror(error));
1069
exitcode = EXIT_FAILURE;
1070
goto end;
1071
}
1072
1073
/* Create the Avahi service browser */
1074
sb = avahi_s_service_browser_new(mc.server, if_index,
1075
AVAHI_PROTO_INET6,
1076
"_mandos._tcp", NULL, 0,
1077
browse_callback, &mc);
1078
if(sb == NULL) {
1079
fprintf(stderr, "Failed to create service browser: %s\n",
1080
avahi_strerror(avahi_server_errno(mc.server)));
1081
exitcode = EXIT_FAILURE;
1082
goto end;
1083
}
1084
1085
/* Run the main loop */
1086
1087
if(debug){
1088
fprintf(stderr, "Starting Avahi loop search\n");
1089
}
1090
1091
avahi_simple_poll_loop(mc.simple_poll);
1092
1448
1093
end:
1449
1450
if(debug){
1451
fprintf(stderr, "%s exiting\n", argv[0]);
1452
}
1453
1454
/* Cleanup things */
1455
if(sb != NULL)
1456
avahi_s_service_browser_free(sb);
1457
1458
if(mc.server != NULL)
1459
avahi_server_free(mc.server);
1460
1461
if(mc.simple_poll != NULL)
1462
avahi_simple_poll_free(mc.simple_poll);
1463
1464
if(gnutls_initialized){
1465
gnutls_certificate_free_credentials(mc.cred);
1466
gnutls_global_deinit();
1467
gnutls_dh_params_deinit(mc.dh_params);
1468
}
1469
1470
if(gpgme_initialized){
1471
gpgme_release(mc.ctx);
1472
}
1473
1474
/* Take down the network interface */
1475
if(take_down_interface){
1476
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1477
if(ret == -1){
1478
perror("ioctl SIOCGIFFLAGS");
1479
} else if(network.ifr_flags & IFF_UP) {
1480
network.ifr_flags &= ~IFF_UP; /* clear flag */
1481
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1482
if(ret == -1){
1483
perror("ioctl SIOCSIFFLAGS");
1484
}
1485
}
1486
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1487
if(ret == -1){
1488
perror("close");
1489
}
1490
}
1491
1492
/* Removes the temp directory used by GPGME */
1493
if(tempdir_created){
1494
DIR *d;
1495
struct dirent *direntry;
1496
d = opendir(tempdir);
1497
if(d == NULL){
1498
if(errno != ENOENT){
1499
perror("opendir");
1500
}
1501
} else {
1502
while(true){
1503
direntry = readdir(d);
1504
if(direntry == NULL){
1505
break;
1506
}
1507
/* Skip "." and ".." */
1508
if(direntry->d_name[0] == '.'
1509
and (direntry->d_name[1] == '\0'
1510
or (direntry->d_name[1] == '.'
1511
and direntry->d_name[2] == '\0'))){
1512
continue;
1513
}
1514
char *fullname = NULL;
1515
ret = asprintf(&fullname, "%s/%s", tempdir,
1516
direntry->d_name);
1517
if(ret < 0){
1518
perror("asprintf");
1519
continue;
1520
}
1521
ret = remove(fullname);
1522
if(ret == -1){
1523
fprintf(stderr, "remove(\"%s\"): %s\n", fullname,
1524
strerror(errno));
1525
}
1526
free(fullname);
1527
}
1528
closedir(d);
1529
}
1530
ret = rmdir(tempdir);
1531
if(ret == -1 and errno != ENOENT){
1532
perror("rmdir");
1533
}
1534
}
1535
1536
if(quit_now){
1537
sigemptyset(&old_sigterm_action.sa_mask);
1538
old_sigterm_action.sa_handler = SIG_DFL;
1539
ret = sigaction(signal_received, &old_sigterm_action, NULL);
1540
if(ret == -1){
1541
perror("sigaction");
1542
}
1543
raise(signal_received);
1544
}
1545
1546
return exitcode;
1094
1095
if(debug){
1096
fprintf(stderr, "%s exiting\n", argv[0]);
1097
}
1098
1099
/* Cleanup things */
1100
if(sb != NULL)
1101
avahi_s_service_browser_free(sb);
1102
1103
if(mc.server != NULL)
1104
avahi_server_free(mc.server);
1105
1106
if(mc.simple_poll != NULL)
1107
avahi_simple_poll_free(mc.simple_poll);
1108
1109
if(gnutls_initialized){
1110
gnutls_certificate_free_credentials(mc.cred);
1111
gnutls_global_deinit();
1112
gnutls_dh_params_deinit(mc.dh_params);
1113
}
1114
1115
if(gpgme_initialized){
1116
gpgme_release(mc.ctx);
1117
}
1118
1119
/* Removes the temp directory used by GPGME */
1120
if(tempdir[0] != '\0'){
1121
DIR *d;
1122
struct dirent *direntry;
1123
d = opendir(tempdir);
1124
if(d == NULL){
1125
if(errno != ENOENT){
1126
perror("opendir");
1127
}
1128
} else {
1129
while(true){
1130
direntry = readdir(d);
1131
if(direntry == NULL){
1132
break;
1133
}
1134
/* Skip "." and ".." */
1135
if(direntry->d_name[0] == '.'
1136
and (direntry->d_name[1] == '\0'
1137
or (direntry->d_name[1] == '.'
1138
and direntry->d_name[2] == '\0'))){
1139
continue;
1140
}
1141
char *fullname = NULL;
1142
ret = asprintf(&fullname, "%s/%s", tempdir,
1143
direntry->d_name);
1144
if(ret < 0){
1145
perror("asprintf");
1146
continue;
1147
}
1148
ret = remove(fullname);
1149
if(ret == -1){
1150
fprintf(stderr, "remove(\"%s\"): %s\n", fullname,
1151
strerror(errno));
1152
}
1153
free(fullname);
1154
}
1155
closedir(d);
1156
}
1157
ret = rmdir(tempdir);
1158
if(ret == -1 and errno != ENOENT){
1159
perror("rmdir");
1160
}
1161
}
1162
1163
return exitcode;
1547
1164
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0