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- Committer: Teddy Hogeborn
- Date: 2009-06-02 10:33:04 UTC
- Revision ID: teddy@fukt.bsnet.se-20090602103304-k6eokrft7wr00255
* plugins.d/mandos-client.c (pgp_packet_decrypt): Remove redundant
"if" statement.
"if" statement.
- 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(),
40
remove() */
43
stdout, ferror(), remove() */
41
44
#include <stdint.h> /* uint16_t, uint32_t */
42
45
#include <stddef.h> /* NULL, size_t, ssize_t */
43
46
#include <stdlib.h> /* free(), EXIT_SUCCESS, EXIT_FAILURE,
44
srand() */
45
#include <stdbool.h> /* bool, true */
47
srand(), strtof() */
48
#include <stdbool.h> /* bool, false, true */
46
49
#include <string.h> /* memset(), strcmp(), strlen(),
47
50
strerror(), asprintf(), strcpy() */
48
#include <sys/ioctl.h> /* ioctl */
51
#include <sys/ioctl.h> /* ioctl */
49
52
#include <sys/types.h> /* socket(), inet_pton(), sockaddr,
50
53
sockaddr_in6, PF_INET6,
51
SOCK_STREAM, INET6_ADDRSTRLEN,
52
uid_t, gid_t, open(), opendir(),
53
DIR */
54
SOCK_STREAM, uid_t, gid_t, open(),
55
opendir(), DIR */
54
56
#include <sys/stat.h> /* open() */
55
57
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
56
struct in6_addr, inet_pton(),
57
connect() */
58
inet_pton(), connect() */
58
59
#include <fcntl.h> /* open() */
59
60
#include <dirent.h> /* opendir(), struct dirent, readdir()
60
61
*/
61
#include <inttypes.h> /* PRIu16, intmax_t, SCNdMAX */
62
#include <inttypes.h> /* PRIu16, PRIdMAX, intmax_t,
63
strtoimax() */
62
64
#include <assert.h> /* assert() */
63
65
#include <errno.h> /* perror(), errno */
64
66
#include <time.h> /* nanosleep(), time() */
65
67
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
66
68
SIOCSIFFLAGS, if_indextoname(),
67
69
if_nametoindex(), IF_NAMESIZE */
68
#include <netinet/in.h>
70
#include <netinet/in.h> /* IN6_IS_ADDR_LINKLOCAL,
71
INET_ADDRSTRLEN, INET6_ADDRSTRLEN
72
*/
69
73
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
70
74
getuid(), getgid(), setuid(),
71
75
setgid() */
72
76
#include <arpa/inet.h> /* inet_pton(), htons */
73
#include <iso646.h> /* not, and, or */
77
#include <iso646.h> /* not, or, and */
74
78
#include <argp.h> /* struct argp_option, error_t, struct
75
79
argp_state, struct argp,
76
80
argp_parse(), ARGP_KEY_ARG,
77
81
ARGP_KEY_END, ARGP_ERR_UNKNOWN */
82
#include <signal.h> /* sigemptyset(), sigaddset(),
83
sigaction(), SIGTERM, sigaction,
84
sig_atomic_t */
85
78
86
#ifdef __linux__
79
87
#include <sys/klog.h> /* klogctl() */
80
#endif
88
#endif /* __linux__ */
81
89
82
90
/* Avahi */
83
91
/* All Avahi types, constants and functions
129
137
gpgme_ctx_t ctx;
130
138
} mandos_context;
131
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
132
145
/*
133
* Make room in "buffer" for at least BUFFER_SIZE additional bytes.
134
* "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,
135
148
* "buffer_length" is how much is already used.
136
149
*/
137
size_t adjustbuffer(char **buffer, size_t buffer_length,
150
size_t incbuffer(char **buffer, size_t buffer_length,
138
151
size_t buffer_capacity){
139
152
if(buffer_length + BUFFER_SIZE > buffer_capacity){
140
153
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
149
162
/*
150
163
* Initialize GPGME.
151
164
*/
152
static bool init_gpgme(mandos_context *mc, const char *seckey,
165
static bool init_gpgme(const char *seckey,
153
166
const char *pubkey, const char *tempdir){
154
167
int ret;
155
168
gpgme_error_t rc;
176
189
return false;
177
190
}
178
191
179
rc = gpgme_op_import(mc->ctx, pgp_data);
192
rc = gpgme_op_import(mc.ctx, pgp_data);
180
193
if(rc != GPG_ERR_NO_ERROR){
181
194
fprintf(stderr, "bad gpgme_op_import: %s: %s\n",
182
195
gpgme_strsource(rc), gpgme_strerror(rc));
192
205
}
193
206
194
207
if(debug){
195
fprintf(stderr, "Initialize gpgme\n");
208
fprintf(stderr, "Initializing GPGME\n");
196
209
}
197
210
198
211
/* Init GPGME */
225
238
}
226
239
227
240
/* Create new GPGME "context" */
228
rc = gpgme_new(&(mc->ctx));
241
rc = gpgme_new(&(mc.ctx));
229
242
if(rc != GPG_ERR_NO_ERROR){
230
243
fprintf(stderr, "bad gpgme_new: %s: %s\n",
231
244
gpgme_strsource(rc), gpgme_strerror(rc));
243
256
* Decrypt OpenPGP data.
244
257
* Returns -1 on error
245
258
*/
246
static ssize_t pgp_packet_decrypt(const mandos_context *mc,
247
const char *cryptotext,
259
static ssize_t pgp_packet_decrypt(const char *cryptotext,
248
260
size_t crypto_size,
249
261
char **plaintext){
250
262
gpgme_data_t dh_crypto, dh_plain;
277
289
278
290
/* Decrypt data from the cryptotext data buffer to the plaintext
279
291
data buffer */
280
rc = gpgme_op_decrypt(mc->ctx, dh_crypto, dh_plain);
292
rc = gpgme_op_decrypt(mc.ctx, dh_crypto, dh_plain);
281
293
if(rc != GPG_ERR_NO_ERROR){
282
294
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
283
295
gpgme_strsource(rc), gpgme_strerror(rc));
284
296
plaintext_length = -1;
285
297
if(debug){
286
298
gpgme_decrypt_result_t result;
287
result = gpgme_op_decrypt_result(mc->ctx);
299
result = gpgme_op_decrypt_result(mc.ctx);
288
300
if(result == NULL){
289
301
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
290
302
} else {
297
309
}
298
310
gpgme_recipient_t recipient;
299
311
recipient = result->recipients;
300
if(recipient){
301
while(recipient != NULL){
302
fprintf(stderr, "Public key algorithm: %s\n",
303
gpgme_pubkey_algo_name(recipient->pubkey_algo));
304
fprintf(stderr, "Key ID: %s\n", recipient->keyid);
305
fprintf(stderr, "Secret key available: %s\n",
306
recipient->status == GPG_ERR_NO_SECKEY
307
? "No" : "Yes");
308
recipient = recipient->next;
309
}
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;
310
320
}
311
321
}
312
322
}
326
336
327
337
*plaintext = NULL;
328
338
while(true){
329
plaintext_capacity = adjustbuffer(plaintext,
339
plaintext_capacity = incbuffer(plaintext,
330
340
(size_t)plaintext_length,
331
341
plaintext_capacity);
332
342
if(plaintext_capacity == 0){
333
perror("adjustbuffer");
343
perror("incbuffer");
334
344
plaintext_length = -1;
335
345
goto decrypt_end;
336
346
}
382
392
fprintf(stderr, "GnuTLS: %s", string);
383
393
}
384
394
385
static int init_gnutls_global(mandos_context *mc,
386
const char *pubkeyfilename,
395
static int init_gnutls_global(const char *pubkeyfilename,
387
396
const char *seckeyfilename){
388
397
int ret;
389
398
407
416
}
408
417
409
418
/* OpenPGP credentials */
410
gnutls_certificate_allocate_credentials(&mc->cred);
419
gnutls_certificate_allocate_credentials(&mc.cred);
411
420
if(ret != GNUTLS_E_SUCCESS){
412
421
fprintf(stderr, "GnuTLS memory error: %s\n", /* Spurious warning
413
* from
414
* -Wunreachable-code
415
*/
422
from
423
-Wunreachable-code
424
*/
416
425
safer_gnutls_strerror(ret));
417
426
gnutls_global_deinit();
418
427
return -1;
425
434
}
426
435
427
436
ret = gnutls_certificate_set_openpgp_key_file
428
(mc->cred, pubkeyfilename, seckeyfilename,
437
(mc.cred, pubkeyfilename, seckeyfilename,
429
438
GNUTLS_OPENPGP_FMT_BASE64);
430
439
if(ret != GNUTLS_E_SUCCESS){
431
440
fprintf(stderr,
437
446
}
438
447
439
448
/* GnuTLS server initialization */
440
ret = gnutls_dh_params_init(&mc->dh_params);
449
ret = gnutls_dh_params_init(&mc.dh_params);
441
450
if(ret != GNUTLS_E_SUCCESS){
442
451
fprintf(stderr, "Error in GnuTLS DH parameter initialization:"
443
452
" %s\n", safer_gnutls_strerror(ret));
444
453
goto globalfail;
445
454
}
446
ret = gnutls_dh_params_generate2(mc->dh_params, mc->dh_bits);
455
ret = gnutls_dh_params_generate2(mc.dh_params, mc.dh_bits);
447
456
if(ret != GNUTLS_E_SUCCESS){
448
457
fprintf(stderr, "Error in GnuTLS prime generation: %s\n",
449
458
safer_gnutls_strerror(ret));
450
459
goto globalfail;
451
460
}
452
461
453
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
462
gnutls_certificate_set_dh_params(mc.cred, mc.dh_params);
454
463
455
464
return 0;
456
465
457
466
globalfail:
458
467
459
gnutls_certificate_free_credentials(mc->cred);
468
gnutls_certificate_free_credentials(mc.cred);
460
469
gnutls_global_deinit();
461
gnutls_dh_params_deinit(mc->dh_params);
470
gnutls_dh_params_deinit(mc.dh_params);
462
471
return -1;
463
472
}
464
473
465
static int init_gnutls_session(mandos_context *mc,
466
gnutls_session_t *session){
474
static int init_gnutls_session(gnutls_session_t *session){
467
475
int ret;
468
476
/* GnuTLS session creation */
469
477
ret = gnutls_init(session, GNUTLS_SERVER);
474
482
475
483
{
476
484
const char *err;
477
ret = gnutls_priority_set_direct(*session, mc->priority, &err);
485
ret = gnutls_priority_set_direct(*session, mc.priority, &err);
478
486
if(ret != GNUTLS_E_SUCCESS){
479
487
fprintf(stderr, "Syntax error at: %s\n", err);
480
488
fprintf(stderr, "GnuTLS error: %s\n",
485
493
}
486
494
487
495
ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,
488
mc->cred);
496
mc.cred);
489
497
if(ret != GNUTLS_E_SUCCESS){
490
498
fprintf(stderr, "Error setting GnuTLS credentials: %s\n",
491
499
safer_gnutls_strerror(ret));
497
505
gnutls_certificate_server_set_request(*session,
498
506
GNUTLS_CERT_IGNORE);
499
507
500
gnutls_dh_set_prime_bits(*session, mc->dh_bits);
508
gnutls_dh_set_prime_bits(*session, mc.dh_bits);
501
509
502
510
return 0;
503
511
}
509
517
/* Called when a Mandos server is found */
510
518
static int start_mandos_communication(const char *ip, uint16_t port,
511
519
AvahiIfIndex if_index,
512
mandos_context *mc){
520
int af){
513
521
int ret, tcp_sd;
514
522
ssize_t sret;
515
union { struct sockaddr in; struct sockaddr_in6 in6; } to;
523
union {
524
struct sockaddr_in in;
525
struct sockaddr_in6 in6;
526
} to;
516
527
char *buffer = NULL;
517
528
char *decrypted_buffer;
518
529
size_t buffer_length = 0;
520
531
ssize_t decrypted_buffer_size;
521
532
size_t written;
522
533
int retval = 0;
523
char interface[IF_NAMESIZE];
524
534
gnutls_session_t session;
525
526
ret = init_gnutls_session(mc, &session);
535
int pf; /* Protocol family */
536
537
switch(af){
538
case AF_INET6:
539
pf = PF_INET6;
540
break;
541
case AF_INET:
542
pf = PF_INET;
543
break;
544
default:
545
fprintf(stderr, "Bad address family: %d\n", af);
546
return -1;
547
}
548
549
ret = init_gnutls_session(&session);
527
550
if(ret != 0){
528
551
return -1;
529
552
}
530
553
531
554
if(debug){
532
fprintf(stderr, "Setting up a tcp connection to %s, port %" PRIu16
555
fprintf(stderr, "Setting up a TCP connection to %s, port %" PRIu16
533
556
"\n", ip, port);
534
557
}
535
558
536
tcp_sd = socket(PF_INET6, SOCK_STREAM, 0);
559
tcp_sd = socket(pf, SOCK_STREAM, 0);
537
560
if(tcp_sd < 0){
538
561
perror("socket");
539
562
return -1;
540
563
}
541
564
542
if(debug){
543
if(if_indextoname((unsigned int)if_index, interface) == NULL){
544
perror("if_indextoname");
545
return -1;
546
}
547
fprintf(stderr, "Binding to interface %s\n", interface);
548
}
549
550
565
memset(&to, 0, sizeof(to));
551
to.in6.sin6_family = AF_INET6;
552
/* It would be nice to have a way to detect if we were passed an
553
IPv4 address here. Now we assume an IPv6 address. */
554
ret = inet_pton(AF_INET6, ip, &to.in6.sin6_addr);
566
if(af == AF_INET6){
567
to.in6.sin6_family = (sa_family_t)af;
568
ret = inet_pton(af, ip, &to.in6.sin6_addr);
569
} else { /* IPv4 */
570
to.in.sin_family = (sa_family_t)af;
571
ret = inet_pton(af, ip, &to.in.sin_addr);
572
}
555
573
if(ret < 0 ){
556
574
perror("inet_pton");
557
575
return -1;
560
578
fprintf(stderr, "Bad address: %s\n", ip);
561
579
return -1;
562
580
}
563
to.in6.sin6_port = htons(port); /* Spurious warnings from
581
if(af == AF_INET6){
582
to.in6.sin6_port = htons(port); /* Spurious warnings from
583
-Wconversion and
584
-Wunreachable-code */
585
586
if(IN6_IS_ADDR_LINKLOCAL /* Spurious warnings from */
587
(&to.in6.sin6_addr)){ /* -Wstrict-aliasing=2 or lower and
588
-Wunreachable-code*/
589
if(if_index == AVAHI_IF_UNSPEC){
590
fprintf(stderr, "An IPv6 link-local address is incomplete"
591
" without a network interface\n");
592
return -1;
593
}
594
/* Set the network interface number as scope */
595
to.in6.sin6_scope_id = (uint32_t)if_index;
596
}
597
} else {
598
to.in.sin_port = htons(port); /* Spurious warnings from
564
599
-Wconversion and
565
600
-Wunreachable-code */
566
567
to.in6.sin6_scope_id = (uint32_t)if_index;
601
}
568
602
569
603
if(debug){
570
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
571
port);
572
char addrstr[INET6_ADDRSTRLEN] = "";
573
if(inet_ntop(to.in6.sin6_family, &(to.in6.sin6_addr), addrstr,
574
sizeof(addrstr)) == NULL){
604
if(af == AF_INET6 and if_index != AVAHI_IF_UNSPEC){
605
char interface[IF_NAMESIZE];
606
if(if_indextoname((unsigned int)if_index, interface) == NULL){
607
perror("if_indextoname");
608
} else {
609
fprintf(stderr, "Connection to: %s%%%s, port %" PRIu16 "\n",
610
ip, interface, port);
611
}
612
} else {
613
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
614
port);
615
}
616
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
617
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
618
const char *pcret;
619
if(af == AF_INET6){
620
pcret = inet_ntop(af, &(to.in6.sin6_addr), addrstr,
621
sizeof(addrstr));
622
} else {
623
pcret = inet_ntop(af, &(to.in.sin_addr), addrstr,
624
sizeof(addrstr));
625
}
626
if(pcret == NULL){
575
627
perror("inet_ntop");
576
628
} else {
577
629
if(strcmp(addrstr, ip) != 0){
580
632
}
581
633
}
582
634
583
ret = connect(tcp_sd, &to.in, sizeof(to));
635
if(af == AF_INET6){
636
ret = connect(tcp_sd, &to.in6, sizeof(to));
637
} else {
638
ret = connect(tcp_sd, &to.in, sizeof(to)); /* IPv4 */
639
}
584
640
if(ret < 0){
585
641
perror("connect");
586
642
return -1;
632
688
/* Read OpenPGP packet that contains the wanted password */
633
689
634
690
if(debug){
635
fprintf(stderr, "Retrieving pgp encrypted password from %s\n",
691
fprintf(stderr, "Retrieving OpenPGP encrypted password from %s\n",
636
692
ip);
637
693
}
638
694
639
695
while(true){
640
buffer_capacity = adjustbuffer(&buffer, buffer_length,
696
buffer_capacity = incbuffer(&buffer, buffer_length,
641
697
buffer_capacity);
642
698
if(buffer_capacity == 0){
643
perror("adjustbuffer");
699
perror("incbuffer");
644
700
retval = -1;
645
701
goto mandos_end;
646
702
}
685
741
gnutls_bye(session, GNUTLS_SHUT_RDWR);
686
742
687
743
if(buffer_length > 0){
688
decrypted_buffer_size = pgp_packet_decrypt(mc, buffer,
744
decrypted_buffer_size = pgp_packet_decrypt(buffer,
689
745
buffer_length,
690
746
&decrypted_buffer);
691
747
if(decrypted_buffer_size >= 0){
726
782
727
783
static void resolve_callback(AvahiSServiceResolver *r,
728
784
AvahiIfIndex interface,
729
AVAHI_GCC_UNUSED AvahiProtocol protocol,
785
AvahiProtocol proto,
730
786
AvahiResolverEvent event,
731
787
const char *name,
732
788
const char *type,
737
793
AVAHI_GCC_UNUSED AvahiStringList *txt,
738
794
AVAHI_GCC_UNUSED AvahiLookupResultFlags
739
795
flags,
740
void* userdata){
741
mandos_context *mc = userdata;
796
AVAHI_GCC_UNUSED void* userdata){
742
797
assert(r);
743
798
744
799
/* Called whenever a service has been resolved successfully or
749
804
case AVAHI_RESOLVER_FAILURE:
750
805
fprintf(stderr, "(Avahi Resolver) Failed to resolve service '%s'"
751
806
" of type '%s' in domain '%s': %s\n", name, type, domain,
752
avahi_strerror(avahi_server_errno(mc->server)));
807
avahi_strerror(avahi_server_errno(mc.server)));
753
808
break;
754
809
755
810
case AVAHI_RESOLVER_FOUND:
761
816
PRIdMAX ") on port %" PRIu16 "\n", name, host_name,
762
817
ip, (intmax_t)interface, port);
763
818
}
764
int ret = start_mandos_communication(ip, port, interface, mc);
819
int ret = start_mandos_communication(ip, port, interface,
820
avahi_proto_to_af(proto));
765
821
if(ret == 0){
766
avahi_simple_poll_quit(mc->simple_poll);
822
avahi_simple_poll_quit(mc.simple_poll);
767
823
}
768
824
}
769
825
}
779
835
const char *domain,
780
836
AVAHI_GCC_UNUSED AvahiLookupResultFlags
781
837
flags,
782
void* userdata){
783
mandos_context *mc = userdata;
838
AVAHI_GCC_UNUSED void* userdata){
784
839
assert(b);
785
840
786
841
/* Called whenever a new services becomes available on the LAN or
791
846
case AVAHI_BROWSER_FAILURE:
792
847
793
848
fprintf(stderr, "(Avahi browser) %s\n",
794
avahi_strerror(avahi_server_errno(mc->server)));
795
avahi_simple_poll_quit(mc->simple_poll);
849
avahi_strerror(avahi_server_errno(mc.server)));
850
avahi_simple_poll_quit(mc.simple_poll);
796
851
return;
797
852
798
853
case AVAHI_BROWSER_NEW:
801
856
the callback function is called the Avahi server will free the
802
857
resolver for us. */
803
858
804
if(!(avahi_s_service_resolver_new(mc->server, interface,
805
protocol, name, type, domain,
806
AVAHI_PROTO_INET6, 0,
807
resolve_callback, mc)))
859
if(avahi_s_service_resolver_new(mc.server, interface, protocol,
860
name, type, domain, protocol, 0,
861
resolve_callback, NULL) == NULL)
808
862
fprintf(stderr, "Avahi: Failed to resolve service '%s': %s\n",
809
name, avahi_strerror(avahi_server_errno(mc->server)));
863
name, avahi_strerror(avahi_server_errno(mc.server)));
810
864
break;
811
865
812
866
case AVAHI_BROWSER_REMOVE:
821
875
}
822
876
}
823
877
878
sig_atomic_t quit_now = 0;
879
880
/* stop main loop after sigterm has been called */
881
static void handle_sigterm(__attribute__((unused)) int sig){
882
if(quit_now){
883
return;
884
}
885
quit_now = 1;
886
int old_errno = errno;
887
if(mc.simple_poll != NULL){
888
avahi_simple_poll_quit(mc.simple_poll);
889
}
890
errno = old_errno;
891
}
892
824
893
int main(int argc, char *argv[]){
825
894
AvahiSServiceBrowser *sb = NULL;
826
895
int error;
827
896
int ret;
828
897
intmax_t tmpmax;
829
int numchars;
898
char *tmp;
830
899
int exitcode = EXIT_SUCCESS;
831
900
const char *interface = "eth0";
832
901
struct ifreq network;
840
909
const char *seckey = PATHDIR "/" SECKEY;
841
910
const char *pubkey = PATHDIR "/" PUBKEY;
842
911
843
mandos_context mc = { .simple_poll = NULL, .server = NULL,
844
.dh_bits = 1024, .priority = "SECURE256"
845
":!CTYPE-X.509:+CTYPE-OPENPGP" };
846
912
bool gnutls_initialized = false;
847
913
bool gpgme_initialized = false;
848
double delay = 2.5;
914
float delay = 2.5f;
915
916
struct sigaction old_sigterm_action;
917
struct sigaction sigterm_action = { .sa_handler = handle_sigterm };
849
918
850
919
{
851
920
struct argp_option options[] = {
857
926
.group = 1 },
858
927
{ .name = "interface", .key = 'i',
859
928
.arg = "NAME",
860
.doc = "Interface that will be used to search for Mandos"
861
" servers",
929
.doc = "Network interface that will be used to search for"
930
" Mandos servers",
862
931
.group = 1 },
863
932
{ .name = "seckey", .key = 's',
864
933
.arg = "FILE",
903
972
pubkey = arg;
904
973
break;
905
974
case 129: /* --dh-bits */
906
ret = sscanf(arg, "%" SCNdMAX "%n", &tmpmax, &numchars);
907
if(ret < 1 or tmpmax != (typeof(mc.dh_bits))tmpmax
908
or arg[numchars] != '\0'){
975
errno = 0;
976
tmpmax = strtoimax(arg, &tmp, 10);
977
if(errno != 0 or tmp == arg or *tmp != '\0'
978
or tmpmax != (typeof(mc.dh_bits))tmpmax){
909
979
fprintf(stderr, "Bad number of DH bits\n");
910
980
exit(EXIT_FAILURE);
911
981
}
915
985
mc.priority = arg;
916
986
break;
917
987
case 131: /* --delay */
918
ret = sscanf(arg, "%lf%n", &delay, &numchars);
919
if(ret < 1 or arg[numchars] != '\0'){
988
errno = 0;
989
delay = strtof(arg, &tmp);
990
if(errno != 0 or tmp == arg or *tmp != '\0'){
920
991
fprintf(stderr, "Bad delay\n");
921
992
exit(EXIT_FAILURE);
922
993
}
943
1014
}
944
1015
}
945
1016
1017
if(not debug){
1018
avahi_set_log_function(empty_log);
1019
}
1020
1021
/* Initialize Avahi early so avahi_simple_poll_quit() can be called
1022
from the signal handler */
1023
/* Initialize the pseudo-RNG for Avahi */
1024
srand((unsigned int) time(NULL));
1025
mc.simple_poll = avahi_simple_poll_new();
1026
if(mc.simple_poll == NULL){
1027
fprintf(stderr, "Avahi: Failed to create simple poll object.\n");
1028
exitcode = EXIT_FAILURE;
1029
goto end;
1030
}
1031
1032
sigemptyset(&sigterm_action.sa_mask);
1033
ret = sigaddset(&sigterm_action.sa_mask, SIGINT);
1034
if(ret == -1){
1035
perror("sigaddset");
1036
exitcode = EXIT_FAILURE;
1037
goto end;
1038
}
1039
ret = sigaddset(&sigterm_action.sa_mask, SIGHUP);
1040
if(ret == -1){
1041
perror("sigaddset");
1042
exitcode = EXIT_FAILURE;
1043
goto end;
1044
}
1045
ret = sigaddset(&sigterm_action.sa_mask, SIGTERM);
1046
if(ret == -1){
1047
perror("sigaddset");
1048
exitcode = EXIT_FAILURE;
1049
goto end;
1050
}
1051
ret = sigaction(SIGTERM, &sigterm_action, &old_sigterm_action);
1052
if(ret == -1){
1053
perror("sigaction");
1054
exitcode = EXIT_FAILURE;
1055
goto end;
1056
}
1057
946
1058
/* If the interface is down, bring it up */
947
{
1059
if(interface[0] != '\0'){
948
1060
#ifdef __linux__
949
1061
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
950
1062
messages to mess up the prompt */
951
1063
ret = klogctl(8, NULL, 5);
1064
bool restore_loglevel = true;
952
1065
if(ret == -1){
1066
restore_loglevel = false;
953
1067
perror("klogctl");
954
1068
}
955
#endif
1069
#endif /* __linux__ */
956
1070
957
1071
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
958
1072
if(sd < 0){
959
1073
perror("socket");
960
1074
exitcode = EXIT_FAILURE;
961
1075
#ifdef __linux__
962
ret = klogctl(7, NULL, 0);
963
if(ret == -1){
964
perror("klogctl");
1076
if(restore_loglevel){
1077
ret = klogctl(7, NULL, 0);
1078
if(ret == -1){
1079
perror("klogctl");
1080
}
965
1081
}
966
#endif
1082
#endif /* __linux__ */
967
1083
goto end;
968
1084
}
969
1085
strcpy(network.ifr_name, interface);
971
1087
if(ret == -1){
972
1088
perror("ioctl SIOCGIFFLAGS");
973
1089
#ifdef __linux__
974
ret = klogctl(7, NULL, 0);
975
if(ret == -1){
976
perror("klogctl");
1090
if(restore_loglevel){
1091
ret = klogctl(7, NULL, 0);
1092
if(ret == -1){
1093
perror("klogctl");
1094
}
977
1095
}
978
#endif
1096
#endif /* __linux__ */
979
1097
exitcode = EXIT_FAILURE;
980
1098
goto end;
981
1099
}
986
1104
perror("ioctl SIOCSIFFLAGS");
987
1105
exitcode = EXIT_FAILURE;
988
1106
#ifdef __linux__
989
ret = klogctl(7, NULL, 0);
990
if(ret == -1){
991
perror("klogctl");
1107
if(restore_loglevel){
1108
ret = klogctl(7, NULL, 0);
1109
if(ret == -1){
1110
perror("klogctl");
1111
}
992
1112
}
993
#endif
1113
#endif /* __linux__ */
994
1114
goto end;
995
1115
}
996
1116
}
1013
1133
perror("close");
1014
1134
}
1015
1135
#ifdef __linux__
1016
/* Restores kernel loglevel to default */
1017
ret = klogctl(7, NULL, 0);
1018
if(ret == -1){
1019
perror("klogctl");
1136
if(restore_loglevel){
1137
/* Restores kernel loglevel to default */
1138
ret = klogctl(7, NULL, 0);
1139
if(ret == -1){
1140
perror("klogctl");
1141
}
1020
1142
}
1021
#endif
1143
#endif /* __linux__ */
1022
1144
}
1023
1145
1024
1146
uid = getuid();
1025
1147
gid = getgid();
1026
1148
1149
errno = 0;
1027
1150
setgid(gid);
1028
1151
if(ret == -1){
1029
1152
perror("setgid");
1034
1157
perror("setuid");
1035
1158
}
1036
1159
1037
ret = init_gnutls_global(&mc, pubkey, seckey);
1160
ret = init_gnutls_global(pubkey, seckey);
1038
1161
if(ret == -1){
1039
1162
fprintf(stderr, "init_gnutls_global failed\n");
1040
1163
exitcode = EXIT_FAILURE;
1049
1172
}
1050
1173
tempdir_created = true;
1051
1174
1052
if(not init_gpgme(&mc, pubkey, seckey, tempdir)){
1175
if(not init_gpgme(pubkey, seckey, tempdir)){
1053
1176
fprintf(stderr, "init_gpgme failed\n");
1054
1177
exitcode = EXIT_FAILURE;
1055
1178
goto end;
1057
1180
gpgme_initialized = true;
1058
1181
}
1059
1182
1060
if_index = (AvahiIfIndex) if_nametoindex(interface);
1061
if(if_index == 0){
1062
fprintf(stderr, "No such interface: \"%s\"\n", interface);
1063
exitcode = EXIT_FAILURE;
1064
goto end;
1183
if(interface[0] != '\0'){
1184
if_index = (AvahiIfIndex) if_nametoindex(interface);
1185
if(if_index == 0){
1186
fprintf(stderr, "No such interface: \"%s\"\n", interface);
1187
exitcode = EXIT_FAILURE;
1188
goto end;
1189
}
1065
1190
}
1066
1191
1067
1192
if(connect_to != NULL){
1074
1199
goto end;
1075
1200
}
1076
1201
uint16_t port;
1077
ret = sscanf(address+1, "%" SCNdMAX "%n", &tmpmax, &numchars);
1078
if(ret < 1 or tmpmax != (uint16_t)tmpmax
1079
or address[numchars+1] != '\0'){
1202
errno = 0;
1203
tmpmax = strtoimax(address+1, &tmp, 10);
1204
if(errno != 0 or tmp == address+1 or *tmp != '\0'
1205
or tmpmax != (uint16_t)tmpmax){
1080
1206
fprintf(stderr, "Bad port number\n");
1081
1207
exitcode = EXIT_FAILURE;
1082
1208
goto end;
1084
1210
port = (uint16_t)tmpmax;
1085
1211
*address = '\0';
1086
1212
address = connect_to;
1087
ret = start_mandos_communication(address, port, if_index, &mc);
1213
/* Colon in address indicates IPv6 */
1214
int af;
1215
if(strchr(address, ':') != NULL){
1216
af = AF_INET6;
1217
} else {
1218
af = AF_INET;
1219
}
1220
ret = start_mandos_communication(address, port, if_index, af);
1088
1221
if(ret < 0){
1089
1222
exitcode = EXIT_FAILURE;
1090
1223
} else {
1092
1225
}
1093
1226
goto end;
1094
1227
}
1095
1096
if(not debug){
1097
avahi_set_log_function(empty_log);
1098
}
1099
1100
/* Initialize the pseudo-RNG for Avahi */
1101
srand((unsigned int) time(NULL));
1102
1103
/* Allocate main Avahi loop object */
1104
mc.simple_poll = avahi_simple_poll_new();
1105
if(mc.simple_poll == NULL){
1106
fprintf(stderr, "Avahi: Failed to create simple poll object.\n");
1107
exitcode = EXIT_FAILURE;
1108
goto end;
1109
}
1110
1228
1111
1229
{
1112
1230
AvahiServerConfig config;
1113
1231
/* Do not publish any local Zeroconf records */
1136
1254
1137
1255
/* Create the Avahi service browser */
1138
1256
sb = avahi_s_service_browser_new(mc.server, if_index,
1139
AVAHI_PROTO_INET6, "_mandos._tcp",
1140
NULL, 0, browse_callback, &mc);
1257
AVAHI_PROTO_UNSPEC, "_mandos._tcp",
1258
NULL, 0, browse_callback, NULL);
1141
1259
if(sb == NULL){
1142
1260
fprintf(stderr, "Failed to create service browser: %s\n",
1143
1261
avahi_strerror(avahi_server_errno(mc.server)));
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0