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- Committer: Teddy Hogeborn
- Date: 2009-09-05 17:39:34 UTC
- Revision ID: teddy@fukt.bsnet.se-20090905173934-gs0r858omhudc71m
* plugin-runner.c (main): Move variables "tmpmax" and "tmp" into
the innermost scope possible.
the innermost scope possible.
- 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
33
34
#define _LARGEFILE_SOURCE
35
#endif
36
#ifndef _FILE_OFFSET_BITS
34
37
#define _FILE_OFFSET_BITS 64
38
#endif
35
39
36
40
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), asprintf() */
37
41
38
42
#include <stdio.h> /* fprintf(), stderr, fwrite(),
39
stdout, ferror(), sscanf */
43
stdout, ferror(), remove() */
40
44
#include <stdint.h> /* uint16_t, uint32_t */
41
45
#include <stddef.h> /* NULL, size_t, ssize_t */
42
46
#include <stdlib.h> /* free(), EXIT_SUCCESS, EXIT_FAILURE,
43
srand() */
44
#include <stdbool.h> /* bool, true */
47
srand(), strtof() */
48
#include <stdbool.h> /* bool, false, true */
45
49
#include <string.h> /* memset(), strcmp(), strlen(),
46
50
strerror(), asprintf(), strcpy() */
47
#include <sys/ioctl.h> /* ioctl */
51
#include <sys/ioctl.h> /* ioctl */
48
52
#include <sys/types.h> /* socket(), inet_pton(), sockaddr,
49
53
sockaddr_in6, PF_INET6,
50
SOCK_STREAM, INET6_ADDRSTRLEN,
51
uid_t, gid_t, open(), opendir(),
52
DIR */
54
SOCK_STREAM, uid_t, gid_t, open(),
55
opendir(), DIR */
53
56
#include <sys/stat.h> /* open() */
54
57
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
55
struct in6_addr, inet_pton(),
56
connect() */
58
inet_pton(), connect() */
57
59
#include <fcntl.h> /* open() */
58
60
#include <dirent.h> /* opendir(), struct dirent, readdir()
59
61
*/
60
#include <inttypes.h> /* PRIu16, intmax_t, SCNdMAX */
62
#include <inttypes.h> /* PRIu16, PRIdMAX, intmax_t,
63
strtoimax() */
61
64
#include <assert.h> /* assert() */
62
65
#include <errno.h> /* perror(), errno */
63
#include <time.h> /* time(), nanosleep() */
66
#include <time.h> /* nanosleep(), time() */
64
67
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
65
68
SIOCSIFFLAGS, if_indextoname(),
66
69
if_nametoindex(), IF_NAMESIZE */
67
#include <netinet/in.h>
70
#include <netinet/in.h> /* IN6_IS_ADDR_LINKLOCAL,
71
INET_ADDRSTRLEN, INET6_ADDRSTRLEN
72
*/
68
73
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
69
74
getuid(), getgid(), setuid(),
70
75
setgid() */
71
76
#include <arpa/inet.h> /* inet_pton(), htons */
72
#include <iso646.h> /* not, and, or */
77
#include <iso646.h> /* not, or, and */
73
78
#include <argp.h> /* struct argp_option, error_t, struct
74
79
argp_state, struct argp,
75
80
argp_parse(), ARGP_KEY_ARG,
76
81
ARGP_KEY_END, ARGP_ERR_UNKNOWN */
82
#include <signal.h> /* sigemptyset(), sigaddset(),
83
sigaction(), SIGTERM, sig_atomic_t,
84
raise() */
85
86
#ifdef __linux__
77
87
#include <sys/klog.h> /* klogctl() */
88
#endif /* __linux__ */
78
89
79
90
/* Avahi */
80
91
/* All Avahi types, constants and functions
126
137
gpgme_ctx_t ctx;
127
138
} mandos_context;
128
139
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
129
145
/*
130
* Make room in "buffer" for at least BUFFER_SIZE additional bytes.
131
* "buffer_capacity" is how much is currently allocated,
146
* Make additional room in "buffer" for at least BUFFER_SIZE more
147
* bytes. "buffer_capacity" is how much is currently allocated,
132
148
* "buffer_length" is how much is already used.
133
149
*/
134
size_t adjustbuffer(char **buffer, size_t buffer_length,
150
size_t incbuffer(char **buffer, size_t buffer_length,
135
151
size_t buffer_capacity){
136
152
if(buffer_length + BUFFER_SIZE > buffer_capacity){
137
153
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
146
162
/*
147
163
* Initialize GPGME.
148
164
*/
149
static bool init_gpgme(mandos_context *mc, const char *seckey,
165
static bool init_gpgme(const char *seckey,
150
166
const char *pubkey, const char *tempdir){
151
167
int ret;
152
168
gpgme_error_t rc;
154
170
155
171
156
172
/*
157
* Helper function to insert pub and seckey to the enigne keyring.
173
* Helper function to insert pub and seckey to the engine keyring.
158
174
*/
159
175
bool import_key(const char *filename){
160
176
int fd;
173
189
return false;
174
190
}
175
191
176
rc = gpgme_op_import(mc->ctx, pgp_data);
192
rc = gpgme_op_import(mc.ctx, pgp_data);
177
193
if(rc != GPG_ERR_NO_ERROR){
178
194
fprintf(stderr, "bad gpgme_op_import: %s: %s\n",
179
195
gpgme_strsource(rc), gpgme_strerror(rc));
189
205
}
190
206
191
207
if(debug){
192
fprintf(stderr, "Initialize gpgme\n");
208
fprintf(stderr, "Initializing GPGME\n");
193
209
}
194
210
195
211
/* Init GPGME */
222
238
}
223
239
224
240
/* Create new GPGME "context" */
225
rc = gpgme_new(&(mc->ctx));
241
rc = gpgme_new(&(mc.ctx));
226
242
if(rc != GPG_ERR_NO_ERROR){
227
243
fprintf(stderr, "bad gpgme_new: %s: %s\n",
228
244
gpgme_strsource(rc), gpgme_strerror(rc));
233
249
return false;
234
250
}
235
251
236
return true;
252
return true;
237
253
}
238
254
239
255
/*
240
256
* Decrypt OpenPGP data.
241
257
* Returns -1 on error
242
258
*/
243
static ssize_t pgp_packet_decrypt(const mandos_context *mc,
244
const char *cryptotext,
259
static ssize_t pgp_packet_decrypt(const char *cryptotext,
245
260
size_t crypto_size,
246
261
char **plaintext){
247
262
gpgme_data_t dh_crypto, dh_plain;
274
289
275
290
/* Decrypt data from the cryptotext data buffer to the plaintext
276
291
data buffer */
277
rc = gpgme_op_decrypt(mc->ctx, dh_crypto, dh_plain);
292
rc = gpgme_op_decrypt(mc.ctx, dh_crypto, dh_plain);
278
293
if(rc != GPG_ERR_NO_ERROR){
279
294
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
280
295
gpgme_strsource(rc), gpgme_strerror(rc));
281
296
plaintext_length = -1;
282
297
if(debug){
283
298
gpgme_decrypt_result_t result;
284
result = gpgme_op_decrypt_result(mc->ctx);
299
result = gpgme_op_decrypt_result(mc.ctx);
285
300
if(result == NULL){
286
301
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
287
302
} else {
294
309
}
295
310
gpgme_recipient_t recipient;
296
311
recipient = result->recipients;
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
}
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;
307
320
}
308
321
}
309
322
}
323
336
324
337
*plaintext = NULL;
325
338
while(true){
326
plaintext_capacity = adjustbuffer(plaintext,
339
plaintext_capacity = incbuffer(plaintext,
327
340
(size_t)plaintext_length,
328
341
plaintext_capacity);
329
342
if(plaintext_capacity == 0){
330
perror("adjustbuffer");
343
perror("incbuffer");
331
344
plaintext_length = -1;
332
345
goto decrypt_end;
333
346
}
365
378
return plaintext_length;
366
379
}
367
380
368
static const char * safer_gnutls_strerror(int value) {
381
static const char * safer_gnutls_strerror(int value){
369
382
const char *ret = gnutls_strerror(value); /* Spurious warning from
370
383
-Wunreachable-code */
371
384
if(ret == NULL)
379
392
fprintf(stderr, "GnuTLS: %s", string);
380
393
}
381
394
382
static int init_gnutls_global(mandos_context *mc,
383
const char *pubkeyfilename,
395
static int init_gnutls_global(const char *pubkeyfilename,
384
396
const char *seckeyfilename){
385
397
int ret;
386
398
389
401
}
390
402
391
403
ret = gnutls_global_init();
392
if(ret != GNUTLS_E_SUCCESS) {
404
if(ret != GNUTLS_E_SUCCESS){
393
405
fprintf(stderr, "GnuTLS global_init: %s\n",
394
406
safer_gnutls_strerror(ret));
395
407
return -1;
404
416
}
405
417
406
418
/* OpenPGP credentials */
407
gnutls_certificate_allocate_credentials(&mc->cred);
419
gnutls_certificate_allocate_credentials(&mc.cred);
408
420
if(ret != GNUTLS_E_SUCCESS){
409
421
fprintf(stderr, "GnuTLS memory error: %s\n", /* Spurious warning
410
* from
411
* -Wunreachable-code
412
*/
422
from
423
-Wunreachable-code
424
*/
413
425
safer_gnutls_strerror(ret));
414
426
gnutls_global_deinit();
415
427
return -1;
422
434
}
423
435
424
436
ret = gnutls_certificate_set_openpgp_key_file
425
(mc->cred, pubkeyfilename, seckeyfilename,
437
(mc.cred, pubkeyfilename, seckeyfilename,
426
438
GNUTLS_OPENPGP_FMT_BASE64);
427
if(ret != GNUTLS_E_SUCCESS) {
439
if(ret != GNUTLS_E_SUCCESS){
428
440
fprintf(stderr,
429
441
"Error[%d] while reading the OpenPGP key pair ('%s',"
430
442
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
434
446
}
435
447
436
448
/* GnuTLS server initialization */
437
ret = gnutls_dh_params_init(&mc->dh_params);
438
if(ret != GNUTLS_E_SUCCESS) {
449
ret = gnutls_dh_params_init(&mc.dh_params);
450
if(ret != GNUTLS_E_SUCCESS){
439
451
fprintf(stderr, "Error in GnuTLS DH parameter initialization:"
440
452
" %s\n", safer_gnutls_strerror(ret));
441
453
goto globalfail;
442
454
}
443
ret = gnutls_dh_params_generate2(mc->dh_params, mc->dh_bits);
444
if(ret != GNUTLS_E_SUCCESS) {
455
ret = gnutls_dh_params_generate2(mc.dh_params, mc.dh_bits);
456
if(ret != GNUTLS_E_SUCCESS){
445
457
fprintf(stderr, "Error in GnuTLS prime generation: %s\n",
446
458
safer_gnutls_strerror(ret));
447
459
goto globalfail;
448
460
}
449
461
450
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
462
gnutls_certificate_set_dh_params(mc.cred, mc.dh_params);
451
463
452
464
return 0;
453
465
454
466
globalfail:
455
467
456
gnutls_certificate_free_credentials(mc->cred);
468
gnutls_certificate_free_credentials(mc.cred);
457
469
gnutls_global_deinit();
458
gnutls_dh_params_deinit(mc->dh_params);
470
gnutls_dh_params_deinit(mc.dh_params);
459
471
return -1;
460
472
}
461
473
462
static int init_gnutls_session(mandos_context *mc,
463
gnutls_session_t *session){
474
static int init_gnutls_session(gnutls_session_t *session){
464
475
int ret;
465
476
/* GnuTLS session creation */
466
477
ret = gnutls_init(session, GNUTLS_SERVER);
471
482
472
483
{
473
484
const char *err;
474
ret = gnutls_priority_set_direct(*session, mc->priority, &err);
475
if(ret != GNUTLS_E_SUCCESS) {
485
ret = gnutls_priority_set_direct(*session, mc.priority, &err);
486
if(ret != GNUTLS_E_SUCCESS){
476
487
fprintf(stderr, "Syntax error at: %s\n", err);
477
488
fprintf(stderr, "GnuTLS error: %s\n",
478
489
safer_gnutls_strerror(ret));
482
493
}
483
494
484
495
ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,
485
mc->cred);
486
if(ret != GNUTLS_E_SUCCESS) {
496
mc.cred);
497
if(ret != GNUTLS_E_SUCCESS){
487
498
fprintf(stderr, "Error setting GnuTLS credentials: %s\n",
488
499
safer_gnutls_strerror(ret));
489
500
gnutls_deinit(*session);
494
505
gnutls_certificate_server_set_request(*session,
495
506
GNUTLS_CERT_IGNORE);
496
507
497
gnutls_dh_set_prime_bits(*session, mc->dh_bits);
508
gnutls_dh_set_prime_bits(*session, mc.dh_bits);
498
509
499
510
return 0;
500
511
}
503
514
static void empty_log(__attribute__((unused)) AvahiLogLevel level,
504
515
__attribute__((unused)) const char *txt){}
505
516
517
sig_atomic_t quit_now = 0;
518
int signal_received = 0;
519
506
520
/* Called when a Mandos server is found */
507
521
static int start_mandos_communication(const char *ip, uint16_t port,
508
522
AvahiIfIndex if_index,
509
mandos_context *mc){
510
int ret, tcp_sd;
523
int af){
524
int ret, tcp_sd = -1;
511
525
ssize_t sret;
512
union { struct sockaddr in; struct sockaddr_in6 in6; } to;
526
union {
527
struct sockaddr_in in;
528
struct sockaddr_in6 in6;
529
} to;
513
530
char *buffer = NULL;
514
531
char *decrypted_buffer;
515
532
size_t buffer_length = 0;
517
534
ssize_t decrypted_buffer_size;
518
535
size_t written;
519
536
int retval = 0;
520
char interface[IF_NAMESIZE];
521
537
gnutls_session_t session;
522
523
ret = init_gnutls_session(mc, &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);
524
557
if(ret != 0){
525
558
return -1;
526
559
}
527
560
528
561
if(debug){
529
fprintf(stderr, "Setting up a tcp connection to %s, port %" PRIu16
562
fprintf(stderr, "Setting up a TCP connection to %s, port %" PRIu16
530
563
"\n", ip, port);
531
564
}
532
565
533
tcp_sd = socket(PF_INET6, SOCK_STREAM, 0);
534
if(tcp_sd < 0) {
566
tcp_sd = socket(pf, SOCK_STREAM, 0);
567
if(tcp_sd < 0){
535
568
perror("socket");
536
return -1;
569
retval = -1;
570
goto mandos_end;
537
571
}
538
572
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);
573
if(quit_now){
574
goto mandos_end;
545
575
}
546
576
547
577
memset(&to, 0, sizeof(to));
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);
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
}
552
585
if(ret < 0 ){
553
586
perror("inet_pton");
554
return -1;
587
retval = -1;
588
goto mandos_end;
555
589
}
556
590
if(ret == 0){
557
591
fprintf(stderr, "Bad address: %s\n", ip);
558
return -1;
592
retval = -1;
593
goto mandos_end;
559
594
}
560
to.in6.sin6_port = htons(port); /* Spurious warnings from
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
561
614
-Wconversion and
562
615
-Wunreachable-code */
616
}
563
617
564
to.in6.sin6_scope_id = (uint32_t)if_index;
618
if(quit_now){
619
goto mandos_end;
620
}
565
621
566
622
if(debug){
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){
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){
572
646
perror("inet_ntop");
573
647
} else {
574
648
if(strcmp(addrstr, ip) != 0){
577
651
}
578
652
}
579
653
580
ret = connect(tcp_sd, &to.in, sizeof(to));
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
}
581
663
if(ret < 0){
582
664
perror("connect");
583
return -1;
665
retval = -1;
666
goto mandos_end;
667
}
668
669
if(quit_now){
670
goto mandos_end;
584
671
}
585
672
586
673
const char *out = mandos_protocol_version;
605
692
break;
606
693
}
607
694
}
695
696
if(quit_now){
697
goto mandos_end;
698
}
608
699
}
609
700
610
701
if(debug){
611
702
fprintf(stderr, "Establishing TLS session with %s\n", ip);
612
703
}
613
704
705
if(quit_now){
706
goto mandos_end;
707
}
708
614
709
gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t) tcp_sd);
615
710
711
if(quit_now){
712
goto mandos_end;
713
}
714
616
715
do{
617
716
ret = gnutls_handshake(session);
717
if(quit_now){
718
goto mandos_end;
719
}
618
720
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
619
721
620
722
if(ret != GNUTLS_E_SUCCESS){
629
731
/* Read OpenPGP packet that contains the wanted password */
630
732
631
733
if(debug){
632
fprintf(stderr, "Retrieving pgp encrypted password from %s\n",
734
fprintf(stderr, "Retrieving OpenPGP encrypted password from %s\n",
633
735
ip);
634
736
}
635
737
636
738
while(true){
637
buffer_capacity = adjustbuffer(&buffer, buffer_length,
739
740
if(quit_now){
741
goto mandos_end;
742
}
743
744
buffer_capacity = incbuffer(&buffer, buffer_length,
638
745
buffer_capacity);
639
746
if(buffer_capacity == 0){
640
perror("adjustbuffer");
747
perror("incbuffer");
641
748
retval = -1;
642
749
goto mandos_end;
643
750
}
644
751
752
if(quit_now){
753
goto mandos_end;
754
}
755
645
756
sret = gnutls_record_recv(session, buffer+buffer_length,
646
757
BUFFER_SIZE);
647
758
if(sret == 0){
655
766
case GNUTLS_E_REHANDSHAKE:
656
767
do{
657
768
ret = gnutls_handshake(session);
769
770
if(quit_now){
771
goto mandos_end;
772
}
658
773
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
659
774
if(ret < 0){
660
775
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
679
794
fprintf(stderr, "Closing TLS session\n");
680
795
}
681
796
797
if(quit_now){
798
goto mandos_end;
799
}
800
682
801
gnutls_bye(session, GNUTLS_SHUT_RDWR);
683
802
803
if(quit_now){
804
goto mandos_end;
805
}
806
684
807
if(buffer_length > 0){
685
decrypted_buffer_size = pgp_packet_decrypt(mc, buffer,
808
decrypted_buffer_size = pgp_packet_decrypt(buffer,
686
809
buffer_length,
687
810
&decrypted_buffer);
688
811
if(decrypted_buffer_size >= 0){
689
812
written = 0;
690
813
while(written < (size_t) decrypted_buffer_size){
814
if(quit_now){
815
goto mandos_end;
816
}
817
691
818
ret = (int)fwrite(decrypted_buffer + written, 1,
692
819
(size_t)decrypted_buffer_size - written,
693
820
stdout);
713
840
714
841
mandos_end:
715
842
free(buffer);
716
ret = (int)TEMP_FAILURE_RETRY(close(tcp_sd));
843
if(tcp_sd >= 0){
844
ret = (int)TEMP_FAILURE_RETRY(close(tcp_sd));
845
}
717
846
if(ret == -1){
718
847
perror("close");
719
848
}
720
849
gnutls_deinit(session);
850
if(quit_now){
851
retval = -1;
852
}
721
853
return retval;
722
854
}
723
855
724
856
static void resolve_callback(AvahiSServiceResolver *r,
725
857
AvahiIfIndex interface,
726
AVAHI_GCC_UNUSED AvahiProtocol protocol,
858
AvahiProtocol proto,
727
859
AvahiResolverEvent event,
728
860
const char *name,
729
861
const char *type,
734
866
AVAHI_GCC_UNUSED AvahiStringList *txt,
735
867
AVAHI_GCC_UNUSED AvahiLookupResultFlags
736
868
flags,
737
void* userdata) {
738
mandos_context *mc = userdata;
869
AVAHI_GCC_UNUSED void* userdata){
739
870
assert(r);
740
871
741
872
/* Called whenever a service has been resolved successfully or
742
873
timed out */
743
874
744
switch(event) {
875
if(quit_now){
876
return;
877
}
878
879
switch(event){
745
880
default:
746
881
case AVAHI_RESOLVER_FAILURE:
747
882
fprintf(stderr, "(Avahi Resolver) Failed to resolve service '%s'"
748
883
" of type '%s' in domain '%s': %s\n", name, type, domain,
749
avahi_strerror(avahi_server_errno(mc->server)));
884
avahi_strerror(avahi_server_errno(mc.server)));
750
885
break;
751
886
752
887
case AVAHI_RESOLVER_FOUND:
758
893
PRIdMAX ") on port %" PRIu16 "\n", name, host_name,
759
894
ip, (intmax_t)interface, port);
760
895
}
761
int ret = start_mandos_communication(ip, port, interface, mc);
896
int ret = start_mandos_communication(ip, port, interface,
897
avahi_proto_to_af(proto));
762
898
if(ret == 0){
763
avahi_simple_poll_quit(mc->simple_poll);
899
avahi_simple_poll_quit(mc.simple_poll);
764
900
}
765
901
}
766
902
}
767
903
avahi_s_service_resolver_free(r);
768
904
}
769
905
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;
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){
781
916
assert(b);
782
917
783
918
/* Called whenever a new services becomes available on the LAN or
784
919
is removed from the LAN */
785
920
786
switch(event) {
921
if(quit_now){
922
return;
923
}
924
925
switch(event){
787
926
default:
788
927
case AVAHI_BROWSER_FAILURE:
789
928
790
929
fprintf(stderr, "(Avahi browser) %s\n",
791
avahi_strerror(avahi_server_errno(mc->server)));
792
avahi_simple_poll_quit(mc->simple_poll);
930
avahi_strerror(avahi_server_errno(mc.server)));
931
avahi_simple_poll_quit(mc.simple_poll);
793
932
return;
794
933
795
934
case AVAHI_BROWSER_NEW:
798
937
the callback function is called the Avahi server will free the
799
938
resolver for us. */
800
939
801
if(!(avahi_s_service_resolver_new(mc->server, interface,
802
protocol, name, type, domain,
803
AVAHI_PROTO_INET6, 0,
804
resolve_callback, mc)))
940
if(avahi_s_service_resolver_new(mc.server, interface, protocol,
941
name, type, domain, protocol, 0,
942
resolve_callback, NULL) == NULL)
805
943
fprintf(stderr, "Avahi: Failed to resolve service '%s': %s\n",
806
name, avahi_strerror(avahi_server_errno(mc->server)));
944
name, avahi_strerror(avahi_server_errno(mc.server)));
807
945
break;
808
946
809
947
case AVAHI_BROWSER_REMOVE:
818
956
}
819
957
}
820
958
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
821
973
int main(int argc, char *argv[]){
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_initalized = false;
843
bool gpgme_initalized = false;
844
double delay = 2.5;
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 = "delay", .key = 131,
877
.arg = "SECONDS",
878
.doc = "Maximum delay to wait for interface startup",
879
.group = 2 },
880
{ .name = NULL }
881
};
882
883
error_t parse_opt(int key, char *arg,
884
struct argp_state *state) {
885
switch(key) {
886
case 128: /* --debug */
887
debug = true;
888
break;
889
case 'c': /* --connect */
890
connect_to = arg;
891
break;
892
case 'i': /* --interface */
893
interface = arg;
894
break;
895
case 's': /* --seckey */
896
seckey = arg;
897
break;
898
case 'p': /* --pubkey */
899
pubkey = arg;
900
break;
901
case 129: /* --dh-bits */
902
ret = sscanf(arg, "%" SCNdMAX "%n", &tmpmax, &numchars);
903
if(ret < 1 or tmpmax != (typeof(mc.dh_bits))tmpmax
904
or arg[numchars] != '\0'){
905
fprintf(stderr, "Bad number of DH bits\n");
906
exit(EXIT_FAILURE);
907
}
908
mc.dh_bits = (typeof(mc.dh_bits))tmpmax;
909
break;
910
case 130: /* --priority */
911
mc.priority = arg;
912
break;
913
case 131: /* --delay */
914
ret = sscanf(arg, "%lf%n", &delay, &numchars);
915
if(ret < 1 or arg[numchars] != '\0'){
916
fprintf(stderr, "Bad delay\n");
917
exit(EXIT_FAILURE);
918
}
919
break;
920
case ARGP_KEY_ARG:
921
argp_usage(state);
922
case ARGP_KEY_END:
923
break;
924
default:
925
return ARGP_ERR_UNKNOWN;
926
}
927
return 0;
928
}
929
930
struct argp argp = { .options = options, .parser = parse_opt,
931
.args_doc = "",
932
.doc = "Mandos client -- Get and decrypt"
933
" passwords from a Mandos server" };
934
ret = argp_parse(&argp, argc, argv, 0, 0, NULL);
935
if(ret == ARGP_ERR_UNKNOWN){
936
fprintf(stderr, "Unknown error while parsing arguments\n");
937
exitcode = EXIT_FAILURE;
938
goto end;
939
}
940
}
941
942
/* If the interface is down, bring it up */
943
{
944
// Lower kernel loglevel to KERN_NOTICE to avoid
945
// KERN_INFO messages to mess up the prompt
946
ret = klogctl(8, NULL, 5);
947
if(ret == -1){
948
perror("klogctl");
949
}
950
951
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
952
if(sd < 0) {
953
perror("socket");
954
exitcode = EXIT_FAILURE;
955
ret = klogctl(7, NULL, 0);
956
if(ret == -1){
957
perror("klogctl");
958
}
959
goto end;
960
}
961
strcpy(network.ifr_name, interface);
962
ret = ioctl(sd, SIOCGIFFLAGS, &network);
963
if(ret == -1){
964
perror("ioctl SIOCGIFFLAGS");
965
ret = klogctl(7, NULL, 0);
966
if(ret == -1){
967
perror("klogctl");
968
}
969
exitcode = EXIT_FAILURE;
970
goto end;
971
}
972
if((network.ifr_flags & IFF_UP) == 0){
973
network.ifr_flags |= IFF_UP;
974
ret = ioctl(sd, SIOCSIFFLAGS, &network);
975
if(ret == -1){
976
perror("ioctl SIOCSIFFLAGS");
977
exitcode = EXIT_FAILURE;
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){
978
1239
ret = klogctl(7, NULL, 0);
979
1240
if(ret == -1){
980
1241
perror("klogctl");
981
1242
}
982
goto end;
983
}
984
}
985
// sleep checking until interface is running
986
for(int i=0; i < delay * 4; i++){
987
ret = ioctl(sd, SIOCGIFFLAGS, &network);
988
if(ret == -1){
989
perror("ioctl SIOCGIFFLAGS");
990
} else if(network.ifr_flags & IFF_RUNNING){
991
break;
992
}
993
struct timespec sleeptime = { .tv_nsec = 250000000 };
994
nanosleep(&sleeptime, NULL);
995
}
1243
}
1244
#endif /* __linux__ */
1245
goto end;
1246
}
1247
}
1248
/* sleep checking until interface is running */
1249
for(int i=0; i < delay * 4; i++){
1250
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1251
if(ret == -1){
1252
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 */
996
1264
ret = (int)TEMP_FAILURE_RETRY(close(sd));
997
1265
if(ret == -1){
998
1266
perror("close");
999
1267
}
1000
// Restores kernel loglevel to default
1268
}
1269
#ifdef __linux__
1270
if(restore_loglevel){
1271
/* Restores kernel loglevel to default */
1001
1272
ret = klogctl(7, NULL, 0);
1002
1273
if(ret == -1){
1003
1274
perror("klogctl");
1004
1275
}
1005
1276
}
1006
1007
uid = getuid();
1008
gid = getgid();
1009
1010
ret = setuid(uid);
1011
if(ret == -1){
1012
perror("setuid");
1013
}
1014
1015
setgid(gid);
1016
if(ret == -1){
1017
perror("setgid");
1018
}
1019
1020
ret = init_gnutls_global(&mc, pubkey, seckey);
1021
if(ret == -1){
1022
fprintf(stderr, "init_gnutls_global failed\n");
1023
exitcode = EXIT_FAILURE;
1024
goto end;
1025
} else {
1026
gnutls_initalized = true;
1027
}
1028
1029
if(mkdtemp(tempdir) == NULL){
1030
perror("mkdtemp");
1031
tempdir[0] = '\0';
1032
goto end;
1033
}
1034
1035
if(not init_gpgme(&mc, pubkey, seckey, tempdir)){
1036
fprintf(stderr, "gpgme_initalized failed\n");
1037
exitcode = EXIT_FAILURE;
1038
goto end;
1039
} else {
1040
gpgme_initalized = true;
1041
}
1042
1043
if_index = (AvahiIfIndex) if_nametoindex(interface);
1044
if(if_index == 0){
1045
fprintf(stderr, "No such interface: \"%s\"\n", interface);
1046
exit(EXIT_FAILURE);
1047
}
1048
1049
if(connect_to != NULL){
1050
/* Connect directly, do not use Zeroconf */
1051
/* (Mainly meant for debugging) */
1052
char *address = strrchr(connect_to, ':');
1053
if(address == NULL){
1054
fprintf(stderr, "No colon in address\n");
1055
exitcode = EXIT_FAILURE;
1056
goto end;
1057
}
1058
uint16_t port;
1059
ret = sscanf(address+1, "%" SCNdMAX "%n", &tmpmax, &numchars);
1060
if(ret < 1 or tmpmax != (uint16_t)tmpmax
1061
or address[numchars+1] != '\0'){
1062
fprintf(stderr, "Bad port number\n");
1063
exitcode = EXIT_FAILURE;
1064
goto end;
1065
}
1066
port = (uint16_t)tmpmax;
1067
*address = '\0';
1068
address = connect_to;
1069
ret = start_mandos_communication(address, port, if_index, &mc);
1070
if(ret < 0){
1071
exitcode = EXIT_FAILURE;
1072
} else {
1073
exitcode = EXIT_SUCCESS;
1074
}
1075
goto end;
1076
}
1077
1078
if(not debug){
1079
avahi_set_log_function(empty_log);
1080
}
1081
1082
/* Initialize the pseudo-RNG for Avahi */
1083
srand((unsigned int) time(NULL));
1084
1085
/* Allocate main Avahi loop object */
1086
mc.simple_poll = avahi_simple_poll_new();
1087
if(mc.simple_poll == NULL) {
1088
fprintf(stderr, "Avahi: Failed to create simple poll"
1089
" object.\n");
1090
exitcode = EXIT_FAILURE;
1091
goto end;
1092
}
1093
1094
{
1095
AvahiServerConfig config;
1096
/* Do not publish any local Zeroconf records */
1097
avahi_server_config_init(&config);
1098
config.publish_hinfo = 0;
1099
config.publish_addresses = 0;
1100
config.publish_workstation = 0;
1101
config.publish_domain = 0;
1102
1103
/* Allocate a new server */
1104
mc.server = avahi_server_new(avahi_simple_poll_get
1105
(mc.simple_poll), &config, NULL,
1106
NULL, &error);
1107
1108
/* Free the Avahi configuration data */
1109
avahi_server_config_free(&config);
1110
}
1111
1112
/* Check if creating the Avahi server object succeeded */
1113
if(mc.server == NULL) {
1114
fprintf(stderr, "Failed to create Avahi server: %s\n",
1115
avahi_strerror(error));
1116
exitcode = EXIT_FAILURE;
1117
goto end;
1118
}
1119
1120
/* Create the Avahi service browser */
1121
sb = avahi_s_service_browser_new(mc.server, if_index,
1122
AVAHI_PROTO_INET6,
1123
"_mandos._tcp", NULL, 0,
1124
browse_callback, &mc);
1125
if(sb == NULL) {
1126
fprintf(stderr, "Failed to create service browser: %s\n",
1127
avahi_strerror(avahi_server_errno(mc.server)));
1128
exitcode = EXIT_FAILURE;
1129
goto end;
1130
}
1131
1132
/* Run the main loop */
1133
1134
if(debug){
1135
fprintf(stderr, "Starting Avahi loop search\n");
1136
}
1137
1138
avahi_simple_poll_loop(mc.simple_poll);
1139
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
1140
1447
end:
1141
1142
if(debug){
1143
fprintf(stderr, "%s exiting\n", argv[0]);
1144
}
1145
1146
/* Cleanup things */
1147
if(sb != NULL)
1148
avahi_s_service_browser_free(sb);
1149
1150
if(mc.server != NULL)
1151
avahi_server_free(mc.server);
1152
1153
if(mc.simple_poll != NULL)
1154
avahi_simple_poll_free(mc.simple_poll);
1155
1156
if(gnutls_initalized){
1157
gnutls_certificate_free_credentials(mc.cred);
1158
gnutls_global_deinit();
1159
gnutls_dh_params_deinit(mc.dh_params);
1160
}
1161
1162
if(gpgme_initalized){
1163
gpgme_release(mc.ctx);
1164
}
1165
1166
/* Removes the temp directory used by GPGME */
1167
if(tempdir[0] != '\0'){
1168
DIR *d;
1169
struct dirent *direntry;
1170
d = opendir(tempdir);
1171
if(d == NULL){
1172
if(errno != ENOENT){
1173
perror("opendir");
1174
}
1175
} else {
1176
while(true){
1177
direntry = readdir(d);
1178
if(direntry == NULL){
1179
break;
1180
}
1181
if(direntry->d_type == DT_REG){
1182
char *fullname = NULL;
1183
ret = asprintf(&fullname, "%s/%s", tempdir,
1184
direntry->d_name);
1185
if(ret < 0){
1186
perror("asprintf");
1187
continue;
1188
}
1189
ret = unlink(fullname);
1190
if(ret == -1){
1191
fprintf(stderr, "unlink(\"%s\"): %s",
1192
fullname, strerror(errno));
1193
}
1194
free(fullname);
1195
}
1196
}
1197
closedir(d);
1198
}
1199
ret = rmdir(tempdir);
1200
if(ret == -1 and errno != ENOENT){
1201
perror("rmdir");
1202
}
1203
}
1204
1205
return exitcode;
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;
1206
1546
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0