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- Committer: Teddy Hogeborn
- Date: 2009-02-05 03:04:47 UTC
- Revision ID: teddy@fukt.bsnet.se-20090205030447-k1039txjutilj00d
* plugin-runner.c (struct plugin.completed): Changed type to "volatile
sig_atomic_t"; all uses
changed.
sig_atomic_t"; all uses
changed.
- 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
64
#include <time.h> /* nanosleep(), 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
78
#ifdef __linux__
87
79
#include <sys/klog.h> /* klogctl() */
88
#endif /* __linux__ */
80
#endif
89
81
90
82
/* Avahi */
91
83
/* All Avahi types, constants and functions
137
129
gpgme_ctx_t ctx;
138
130
} mandos_context;
139
131
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
132
/*
146
* Make additional room in "buffer" for at least BUFFER_SIZE more
147
* bytes. "buffer_capacity" is how much is currently allocated,
133
* Make room in "buffer" for at least BUFFER_SIZE additional bytes.
134
* "buffer_capacity" is how much is currently allocated,
148
135
* "buffer_length" is how much is already used.
149
136
*/
150
size_t incbuffer(char **buffer, size_t buffer_length,
137
size_t adjustbuffer(char **buffer, size_t buffer_length,
151
138
size_t buffer_capacity){
152
139
if(buffer_length + BUFFER_SIZE > buffer_capacity){
153
140
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
162
149
/*
163
150
* Initialize GPGME.
164
151
*/
165
static bool init_gpgme(const char *seckey,
152
static bool init_gpgme(mandos_context *mc, const char *seckey,
166
153
const char *pubkey, const char *tempdir){
167
154
int ret;
168
155
gpgme_error_t rc;
189
176
return false;
190
177
}
191
178
192
rc = gpgme_op_import(mc.ctx, pgp_data);
179
rc = gpgme_op_import(mc->ctx, pgp_data);
193
180
if(rc != GPG_ERR_NO_ERROR){
194
181
fprintf(stderr, "bad gpgme_op_import: %s: %s\n",
195
182
gpgme_strsource(rc), gpgme_strerror(rc));
205
192
}
206
193
207
194
if(debug){
208
fprintf(stderr, "Initializing GPGME\n");
195
fprintf(stderr, "Initialize gpgme\n");
209
196
}
210
197
211
198
/* Init GPGME */
238
225
}
239
226
240
227
/* Create new GPGME "context" */
241
rc = gpgme_new(&(mc.ctx));
228
rc = gpgme_new(&(mc->ctx));
242
229
if(rc != GPG_ERR_NO_ERROR){
243
230
fprintf(stderr, "bad gpgme_new: %s: %s\n",
244
231
gpgme_strsource(rc), gpgme_strerror(rc));
249
236
return false;
250
237
}
251
238
252
return true;
239
return true;
253
240
}
254
241
255
242
/*
256
243
* Decrypt OpenPGP data.
257
244
* Returns -1 on error
258
245
*/
259
static ssize_t pgp_packet_decrypt(const char *cryptotext,
246
static ssize_t pgp_packet_decrypt(const mandos_context *mc,
247
const char *cryptotext,
260
248
size_t crypto_size,
261
249
char **plaintext){
262
250
gpgme_data_t dh_crypto, dh_plain;
289
277
290
278
/* Decrypt data from the cryptotext data buffer to the plaintext
291
279
data buffer */
292
rc = gpgme_op_decrypt(mc.ctx, dh_crypto, dh_plain);
280
rc = gpgme_op_decrypt(mc->ctx, dh_crypto, dh_plain);
293
281
if(rc != GPG_ERR_NO_ERROR){
294
282
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
295
283
gpgme_strsource(rc), gpgme_strerror(rc));
296
284
plaintext_length = -1;
297
285
if(debug){
298
286
gpgme_decrypt_result_t result;
299
result = gpgme_op_decrypt_result(mc.ctx);
287
result = gpgme_op_decrypt_result(mc->ctx);
300
288
if(result == NULL){
301
289
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
302
290
} else {
309
297
}
310
298
gpgme_recipient_t recipient;
311
299
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;
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
}
320
310
}
321
311
}
322
312
}
336
326
337
327
*plaintext = NULL;
338
328
while(true){
339
plaintext_capacity = incbuffer(plaintext,
329
plaintext_capacity = adjustbuffer(plaintext,
340
330
(size_t)plaintext_length,
341
331
plaintext_capacity);
342
332
if(plaintext_capacity == 0){
343
perror("incbuffer");
333
perror("adjustbuffer");
344
334
plaintext_length = -1;
345
335
goto decrypt_end;
346
336
}
392
382
fprintf(stderr, "GnuTLS: %s", string);
393
383
}
394
384
395
static int init_gnutls_global(const char *pubkeyfilename,
385
static int init_gnutls_global(mandos_context *mc,
386
const char *pubkeyfilename,
396
387
const char *seckeyfilename){
397
388
int ret;
398
389
416
407
}
417
408
418
409
/* OpenPGP credentials */
419
gnutls_certificate_allocate_credentials(&mc.cred);
410
gnutls_certificate_allocate_credentials(&mc->cred);
420
411
if(ret != GNUTLS_E_SUCCESS){
421
412
fprintf(stderr, "GnuTLS memory error: %s\n", /* Spurious warning
422
from
423
-Wunreachable-code
424
*/
413
* from
414
* -Wunreachable-code
415
*/
425
416
safer_gnutls_strerror(ret));
426
417
gnutls_global_deinit();
427
418
return -1;
434
425
}
435
426
436
427
ret = gnutls_certificate_set_openpgp_key_file
437
(mc.cred, pubkeyfilename, seckeyfilename,
428
(mc->cred, pubkeyfilename, seckeyfilename,
438
429
GNUTLS_OPENPGP_FMT_BASE64);
439
430
if(ret != GNUTLS_E_SUCCESS){
440
431
fprintf(stderr,
446
437
}
447
438
448
439
/* GnuTLS server initialization */
449
ret = gnutls_dh_params_init(&mc.dh_params);
440
ret = gnutls_dh_params_init(&mc->dh_params);
450
441
if(ret != GNUTLS_E_SUCCESS){
451
442
fprintf(stderr, "Error in GnuTLS DH parameter initialization:"
452
443
" %s\n", safer_gnutls_strerror(ret));
453
444
goto globalfail;
454
445
}
455
ret = gnutls_dh_params_generate2(mc.dh_params, mc.dh_bits);
446
ret = gnutls_dh_params_generate2(mc->dh_params, mc->dh_bits);
456
447
if(ret != GNUTLS_E_SUCCESS){
457
448
fprintf(stderr, "Error in GnuTLS prime generation: %s\n",
458
449
safer_gnutls_strerror(ret));
459
450
goto globalfail;
460
451
}
461
452
462
gnutls_certificate_set_dh_params(mc.cred, mc.dh_params);
453
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
463
454
464
455
return 0;
465
456
466
457
globalfail:
467
458
468
gnutls_certificate_free_credentials(mc.cred);
459
gnutls_certificate_free_credentials(mc->cred);
469
460
gnutls_global_deinit();
470
gnutls_dh_params_deinit(mc.dh_params);
461
gnutls_dh_params_deinit(mc->dh_params);
471
462
return -1;
472
463
}
473
464
474
static int init_gnutls_session(gnutls_session_t *session){
465
static int init_gnutls_session(mandos_context *mc,
466
gnutls_session_t *session){
475
467
int ret;
476
468
/* GnuTLS session creation */
477
469
ret = gnutls_init(session, GNUTLS_SERVER);
482
474
483
475
{
484
476
const char *err;
485
ret = gnutls_priority_set_direct(*session, mc.priority, &err);
477
ret = gnutls_priority_set_direct(*session, mc->priority, &err);
486
478
if(ret != GNUTLS_E_SUCCESS){
487
479
fprintf(stderr, "Syntax error at: %s\n", err);
488
480
fprintf(stderr, "GnuTLS error: %s\n",
493
485
}
494
486
495
487
ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,
496
mc.cred);
488
mc->cred);
497
489
if(ret != GNUTLS_E_SUCCESS){
498
490
fprintf(stderr, "Error setting GnuTLS credentials: %s\n",
499
491
safer_gnutls_strerror(ret));
505
497
gnutls_certificate_server_set_request(*session,
506
498
GNUTLS_CERT_IGNORE);
507
499
508
gnutls_dh_set_prime_bits(*session, mc.dh_bits);
500
gnutls_dh_set_prime_bits(*session, mc->dh_bits);
509
501
510
502
return 0;
511
503
}
514
506
static void empty_log(__attribute__((unused)) AvahiLogLevel level,
515
507
__attribute__((unused)) const char *txt){}
516
508
517
sig_atomic_t quit_now = 0;
518
int signal_received = 0;
519
520
509
/* Called when a Mandos server is found */
521
510
static int start_mandos_communication(const char *ip, uint16_t port,
522
511
AvahiIfIndex if_index,
523
int af){
512
mandos_context *mc){
524
513
int ret, tcp_sd;
525
514
ssize_t sret;
526
union {
527
struct sockaddr_in in;
528
struct sockaddr_in6 in6;
529
} to;
515
union { struct sockaddr in; struct sockaddr_in6 in6; } to;
530
516
char *buffer = NULL;
531
517
char *decrypted_buffer;
532
518
size_t buffer_length = 0;
534
520
ssize_t decrypted_buffer_size;
535
521
size_t written;
536
522
int retval = 0;
523
char interface[IF_NAMESIZE];
537
524
gnutls_session_t session;
538
int pf; /* Protocol family */
539
540
switch(af){
541
case AF_INET6:
542
pf = PF_INET6;
543
break;
544
case AF_INET:
545
pf = PF_INET;
546
break;
547
default:
548
fprintf(stderr, "Bad address family: %d\n", af);
549
return -1;
550
}
551
552
ret = init_gnutls_session(&session);
525
526
ret = init_gnutls_session(mc, &session);
553
527
if(ret != 0){
554
528
return -1;
555
529
}
556
530
557
531
if(debug){
558
fprintf(stderr, "Setting up a TCP connection to %s, port %" PRIu16
532
fprintf(stderr, "Setting up a tcp connection to %s, port %" PRIu16
559
533
"\n", ip, port);
560
534
}
561
535
562
tcp_sd = socket(pf, SOCK_STREAM, 0);
536
tcp_sd = socket(PF_INET6, SOCK_STREAM, 0);
563
537
if(tcp_sd < 0){
564
538
perror("socket");
565
539
return -1;
566
540
}
567
541
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
568
550
memset(&to, 0, sizeof(to));
569
if(af == AF_INET6){
570
to.in6.sin6_family = (sa_family_t)af;
571
ret = inet_pton(af, ip, &to.in6.sin6_addr);
572
} else { /* IPv4 */
573
to.in.sin_family = (sa_family_t)af;
574
ret = inet_pton(af, ip, &to.in.sin_addr);
575
}
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);
576
555
if(ret < 0 ){
577
556
perror("inet_pton");
578
557
return -1;
581
560
fprintf(stderr, "Bad address: %s\n", ip);
582
561
return -1;
583
562
}
584
if(af == AF_INET6){
585
to.in6.sin6_port = htons(port); /* Spurious warnings from
586
-Wconversion and
587
-Wunreachable-code */
588
589
if(IN6_IS_ADDR_LINKLOCAL /* Spurious warnings from */
590
(&to.in6.sin6_addr)){ /* -Wstrict-aliasing=2 or lower and
591
-Wunreachable-code*/
592
if(if_index == AVAHI_IF_UNSPEC){
593
fprintf(stderr, "An IPv6 link-local address is incomplete"
594
" without a network interface\n");
595
return -1;
596
}
597
/* Set the network interface number as scope */
598
to.in6.sin6_scope_id = (uint32_t)if_index;
599
}
600
} else {
601
to.in.sin_port = htons(port); /* Spurious warnings from
563
to.in6.sin6_port = htons(port); /* Spurious warnings from
602
564
-Wconversion and
603
565
-Wunreachable-code */
604
}
566
567
to.in6.sin6_scope_id = (uint32_t)if_index;
605
568
606
569
if(debug){
607
if(af == AF_INET6 and if_index != AVAHI_IF_UNSPEC){
608
char interface[IF_NAMESIZE];
609
if(if_indextoname((unsigned int)if_index, interface) == NULL){
610
perror("if_indextoname");
611
} else {
612
fprintf(stderr, "Connection to: %s%%%s, port %" PRIu16 "\n",
613
ip, interface, port);
614
}
615
} else {
616
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
617
port);
618
}
619
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
620
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
621
const char *pcret;
622
if(af == AF_INET6){
623
pcret = inet_ntop(af, &(to.in6.sin6_addr), addrstr,
624
sizeof(addrstr));
625
} else {
626
pcret = inet_ntop(af, &(to.in.sin_addr), addrstr,
627
sizeof(addrstr));
628
}
629
if(pcret == NULL){
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){
630
575
perror("inet_ntop");
631
576
} else {
632
577
if(strcmp(addrstr, ip) != 0){
635
580
}
636
581
}
637
582
638
if(af == AF_INET6){
639
ret = connect(tcp_sd, &to.in6, sizeof(to));
640
} else {
641
ret = connect(tcp_sd, &to.in, sizeof(to)); /* IPv4 */
642
}
583
ret = connect(tcp_sd, &to.in, sizeof(to));
643
584
if(ret < 0){
644
585
perror("connect");
645
586
return -1;
691
632
/* Read OpenPGP packet that contains the wanted password */
692
633
693
634
if(debug){
694
fprintf(stderr, "Retrieving OpenPGP encrypted password from %s\n",
635
fprintf(stderr, "Retrieving pgp encrypted password from %s\n",
695
636
ip);
696
637
}
697
638
698
639
while(true){
699
buffer_capacity = incbuffer(&buffer, buffer_length,
640
buffer_capacity = adjustbuffer(&buffer, buffer_length,
700
641
buffer_capacity);
701
642
if(buffer_capacity == 0){
702
perror("incbuffer");
643
perror("adjustbuffer");
703
644
retval = -1;
704
645
goto mandos_end;
705
646
}
744
685
gnutls_bye(session, GNUTLS_SHUT_RDWR);
745
686
746
687
if(buffer_length > 0){
747
decrypted_buffer_size = pgp_packet_decrypt(buffer,
688
decrypted_buffer_size = pgp_packet_decrypt(mc, buffer,
748
689
buffer_length,
749
690
&decrypted_buffer);
750
691
if(decrypted_buffer_size >= 0){
785
726
786
727
static void resolve_callback(AvahiSServiceResolver *r,
787
728
AvahiIfIndex interface,
788
AvahiProtocol proto,
729
AVAHI_GCC_UNUSED AvahiProtocol protocol,
789
730
AvahiResolverEvent event,
790
731
const char *name,
791
732
const char *type,
796
737
AVAHI_GCC_UNUSED AvahiStringList *txt,
797
738
AVAHI_GCC_UNUSED AvahiLookupResultFlags
798
739
flags,
799
AVAHI_GCC_UNUSED void* userdata){
740
void* userdata){
741
mandos_context *mc = userdata;
800
742
assert(r);
801
743
802
744
/* Called whenever a service has been resolved successfully or
803
745
timed out */
804
746
805
if(quit_now){
806
return;
807
}
808
809
747
switch(event){
810
748
default:
811
749
case AVAHI_RESOLVER_FAILURE:
812
750
fprintf(stderr, "(Avahi Resolver) Failed to resolve service '%s'"
813
751
" of type '%s' in domain '%s': %s\n", name, type, domain,
814
avahi_strerror(avahi_server_errno(mc.server)));
752
avahi_strerror(avahi_server_errno(mc->server)));
815
753
break;
816
754
817
755
case AVAHI_RESOLVER_FOUND:
823
761
PRIdMAX ") on port %" PRIu16 "\n", name, host_name,
824
762
ip, (intmax_t)interface, port);
825
763
}
826
int ret = start_mandos_communication(ip, port, interface,
827
avahi_proto_to_af(proto));
764
int ret = start_mandos_communication(ip, port, interface, mc);
828
765
if(ret == 0){
829
avahi_simple_poll_quit(mc.simple_poll);
766
avahi_simple_poll_quit(mc->simple_poll);
830
767
}
831
768
}
832
769
}
842
779
const char *domain,
843
780
AVAHI_GCC_UNUSED AvahiLookupResultFlags
844
781
flags,
845
AVAHI_GCC_UNUSED void* userdata){
782
void* userdata){
783
mandos_context *mc = userdata;
846
784
assert(b);
847
785
848
786
/* Called whenever a new services becomes available on the LAN or
853
791
case AVAHI_BROWSER_FAILURE:
854
792
855
793
fprintf(stderr, "(Avahi browser) %s\n",
856
avahi_strerror(avahi_server_errno(mc.server)));
857
avahi_simple_poll_quit(mc.simple_poll);
794
avahi_strerror(avahi_server_errno(mc->server)));
795
avahi_simple_poll_quit(mc->simple_poll);
858
796
return;
859
797
860
798
case AVAHI_BROWSER_NEW:
863
801
the callback function is called the Avahi server will free the
864
802
resolver for us. */
865
803
866
if(avahi_s_service_resolver_new(mc.server, interface, protocol,
867
name, type, domain, protocol, 0,
868
resolve_callback, NULL) == NULL)
804
if(!(avahi_s_service_resolver_new(mc->server, interface,
805
protocol, name, type, domain,
806
AVAHI_PROTO_INET6, 0,
807
resolve_callback, mc)))
869
808
fprintf(stderr, "Avahi: Failed to resolve service '%s': %s\n",
870
name, avahi_strerror(avahi_server_errno(mc.server)));
809
name, avahi_strerror(avahi_server_errno(mc->server)));
871
810
break;
872
811
873
812
case AVAHI_BROWSER_REMOVE:
882
821
}
883
822
}
884
823
885
/* stop main loop after sigterm has been called */
886
static void handle_sigterm(int sig){
887
if(quit_now){
888
return;
889
}
890
quit_now = 1;
891
signal_received = sig;
892
int old_errno = errno;
893
if(mc.simple_poll != NULL){
894
avahi_simple_poll_quit(mc.simple_poll);
895
}
896
errno = old_errno;
897
}
898
899
824
int main(int argc, char *argv[]){
900
825
AvahiSServiceBrowser *sb = NULL;
901
826
int error;
902
827
int ret;
903
828
intmax_t tmpmax;
904
char *tmp;
829
int numchars;
905
830
int exitcode = EXIT_SUCCESS;
906
831
const char *interface = "eth0";
907
832
struct ifreq network;
908
int sd = -1;
909
bool take_down_interface = false;
833
int sd;
910
834
uid_t uid;
911
835
gid_t gid;
912
836
char *connect_to = NULL;
916
840
const char *seckey = PATHDIR "/" SECKEY;
917
841
const char *pubkey = PATHDIR "/" PUBKEY;
918
842
843
mandos_context mc = { .simple_poll = NULL, .server = NULL,
844
.dh_bits = 1024, .priority = "SECURE256"
845
":!CTYPE-X.509:+CTYPE-OPENPGP" };
919
846
bool gnutls_initialized = false;
920
847
bool gpgme_initialized = false;
921
float delay = 2.5f;
922
923
struct sigaction old_sigterm_action;
924
struct sigaction sigterm_action = { .sa_handler = handle_sigterm };
848
double delay = 2.5;
925
849
926
850
{
927
851
struct argp_option options[] = {
933
857
.group = 1 },
934
858
{ .name = "interface", .key = 'i',
935
859
.arg = "NAME",
936
.doc = "Network interface that will be used to search for"
937
" Mandos servers",
860
.doc = "Interface that will be used to search for Mandos"
861
" servers",
938
862
.group = 1 },
939
863
{ .name = "seckey", .key = 's',
940
864
.arg = "FILE",
979
903
pubkey = arg;
980
904
break;
981
905
case 129: /* --dh-bits */
982
errno = 0;
983
tmpmax = strtoimax(arg, &tmp, 10);
984
if(errno != 0 or tmp == arg or *tmp != '\0'
985
or tmpmax != (typeof(mc.dh_bits))tmpmax){
906
ret = sscanf(arg, "%" SCNdMAX "%n", &tmpmax, &numchars);
907
if(ret < 1 or tmpmax != (typeof(mc.dh_bits))tmpmax
908
or arg[numchars] != '\0'){
986
909
fprintf(stderr, "Bad number of DH bits\n");
987
910
exit(EXIT_FAILURE);
988
911
}
992
915
mc.priority = arg;
993
916
break;
994
917
case 131: /* --delay */
995
errno = 0;
996
delay = strtof(arg, &tmp);
997
if(errno != 0 or tmp == arg or *tmp != '\0'){
918
ret = sscanf(arg, "%lf%n", &delay, &numchars);
919
if(ret < 1 or arg[numchars] != '\0'){
998
920
fprintf(stderr, "Bad delay\n");
999
921
exit(EXIT_FAILURE);
1000
922
}
1021
943
}
1022
944
}
1023
945
1024
if(not debug){
1025
avahi_set_log_function(empty_log);
1026
}
1027
1028
/* Initialize Avahi early so avahi_simple_poll_quit() can be called
1029
from the signal handler */
1030
/* Initialize the pseudo-RNG for Avahi */
1031
srand((unsigned int) time(NULL));
1032
mc.simple_poll = avahi_simple_poll_new();
1033
if(mc.simple_poll == NULL){
1034
fprintf(stderr, "Avahi: Failed to create simple poll object.\n");
1035
exitcode = EXIT_FAILURE;
1036
goto end;
1037
}
1038
1039
sigemptyset(&sigterm_action.sa_mask);
1040
ret = sigaddset(&sigterm_action.sa_mask, SIGINT);
1041
if(ret == -1){
1042
perror("sigaddset");
1043
exitcode = EXIT_FAILURE;
1044
goto end;
1045
}
1046
ret = sigaddset(&sigterm_action.sa_mask, SIGHUP);
1047
if(ret == -1){
1048
perror("sigaddset");
1049
exitcode = EXIT_FAILURE;
1050
goto end;
1051
}
1052
ret = sigaddset(&sigterm_action.sa_mask, SIGTERM);
1053
if(ret == -1){
1054
perror("sigaddset");
1055
exitcode = EXIT_FAILURE;
1056
goto end;
1057
}
1058
ret = sigaction(SIGINT, &sigterm_action, &old_sigterm_action);
1059
if(ret == -1){
1060
perror("sigaction");
1061
exitcode = EXIT_FAILURE;
1062
goto end;
1063
}
1064
ret = sigaction(SIGHUP, &sigterm_action, NULL);
1065
if(ret == -1){
1066
perror("sigaction");
1067
exitcode = EXIT_FAILURE;
1068
goto end;
1069
}
1070
ret = sigaction(SIGTERM, &sigterm_action, NULL);
1071
if(ret == -1){
1072
perror("sigaction");
1073
exitcode = EXIT_FAILURE;
1074
goto end;
1075
}
1076
1077
946
/* If the interface is down, bring it up */
1078
if(interface[0] != '\0'){
1079
if_index = (AvahiIfIndex) if_nametoindex(interface);
1080
if(if_index == 0){
1081
fprintf(stderr, "No such interface: \"%s\"\n", interface);
1082
exitcode = EXIT_FAILURE;
1083
goto end;
1084
}
1085
1086
if(quit_now){
1087
goto end;
1088
}
1089
947
{
1090
948
#ifdef __linux__
1091
949
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1092
950
messages to mess up the prompt */
1093
951
ret = klogctl(8, NULL, 5);
1094
bool restore_loglevel = true;
1095
952
if(ret == -1){
1096
restore_loglevel = false;
1097
953
perror("klogctl");
1098
954
}
1099
#endif /* __linux__ */
955
#endif
1100
956
1101
957
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1102
958
if(sd < 0){
1103
959
perror("socket");
1104
960
exitcode = EXIT_FAILURE;
1105
961
#ifdef __linux__
1106
if(restore_loglevel){
1107
ret = klogctl(7, NULL, 0);
1108
if(ret == -1){
1109
perror("klogctl");
1110
}
962
ret = klogctl(7, NULL, 0);
963
if(ret == -1){
964
perror("klogctl");
1111
965
}
1112
#endif /* __linux__ */
966
#endif
1113
967
goto end;
1114
968
}
1115
969
strcpy(network.ifr_name, interface);
1117
971
if(ret == -1){
1118
972
perror("ioctl SIOCGIFFLAGS");
1119
973
#ifdef __linux__
1120
if(restore_loglevel){
1121
ret = klogctl(7, NULL, 0);
1122
if(ret == -1){
1123
perror("klogctl");
1124
}
974
ret = klogctl(7, NULL, 0);
975
if(ret == -1){
976
perror("klogctl");
1125
977
}
1126
#endif /* __linux__ */
978
#endif
1127
979
exitcode = EXIT_FAILURE;
1128
980
goto end;
1129
981
}
1130
982
if((network.ifr_flags & IFF_UP) == 0){
1131
983
network.ifr_flags |= IFF_UP;
1132
take_down_interface = true;
1133
984
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1134
985
if(ret == -1){
1135
take_down_interface = false;
1136
986
perror("ioctl SIOCSIFFLAGS");
1137
987
exitcode = EXIT_FAILURE;
1138
988
#ifdef __linux__
1139
if(restore_loglevel){
1140
ret = klogctl(7, NULL, 0);
1141
if(ret == -1){
1142
perror("klogctl");
1143
}
989
ret = klogctl(7, NULL, 0);
990
if(ret == -1){
991
perror("klogctl");
1144
992
}
1145
#endif /* __linux__ */
993
#endif
1146
994
goto end;
1147
995
}
1148
996
}
1160
1008
perror("nanosleep");
1161
1009
}
1162
1010
}
1163
if(not take_down_interface){
1164
/* We won't need the socket anymore */
1165
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1166
if(ret == -1){
1167
perror("close");
1168
}
1011
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1012
if(ret == -1){
1013
perror("close");
1169
1014
}
1170
1015
#ifdef __linux__
1171
if(restore_loglevel){
1172
/* Restores kernel loglevel to default */
1173
ret = klogctl(7, NULL, 0);
1174
if(ret == -1){
1175
perror("klogctl");
1176
}
1016
/* Restores kernel loglevel to default */
1017
ret = klogctl(7, NULL, 0);
1018
if(ret == -1){
1019
perror("klogctl");
1177
1020
}
1178
#endif /* __linux__ */
1179
}
1180
1181
if(quit_now){
1182
goto end;
1021
#endif
1183
1022
}
1184
1023
1185
1024
uid = getuid();
1186
1025
gid = getgid();
1187
1026
1188
errno = 0;
1189
1027
setgid(gid);
1190
1028
if(ret == -1){
1191
1029
perror("setgid");
1196
1034
perror("setuid");
1197
1035
}
1198
1036
1199
if(quit_now){
1200
goto end;
1201
}
1202
1203
ret = init_gnutls_global(pubkey, seckey);
1037
ret = init_gnutls_global(&mc, pubkey, seckey);
1204
1038
if(ret == -1){
1205
1039
fprintf(stderr, "init_gnutls_global failed\n");
1206
1040
exitcode = EXIT_FAILURE;
1209
1043
gnutls_initialized = true;
1210
1044
}
1211
1045
1212
if(quit_now){
1213
goto end;
1214
}
1215
1216
tempdir_created = true;
1217
1046
if(mkdtemp(tempdir) == NULL){
1218
tempdir_created = false;
1219
1047
perror("mkdtemp");
1220
1048
goto end;
1221
1049
}
1222
1223
if(quit_now){
1224
goto end;
1225
}
1226
1227
if(not init_gpgme(pubkey, seckey, tempdir)){
1050
tempdir_created = true;
1051
1052
if(not init_gpgme(&mc, pubkey, seckey, tempdir)){
1228
1053
fprintf(stderr, "init_gpgme failed\n");
1229
1054
exitcode = EXIT_FAILURE;
1230
1055
goto end;
1232
1057
gpgme_initialized = true;
1233
1058
}
1234
1059
1235
if(quit_now){
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;
1236
1064
goto end;
1237
1065
}
1238
1066
1245
1073
exitcode = EXIT_FAILURE;
1246
1074
goto end;
1247
1075
}
1248
1249
if(quit_now){
1250
goto end;
1251
}
1252
1253
1076
uint16_t port;
1254
errno = 0;
1255
tmpmax = strtoimax(address+1, &tmp, 10);
1256
if(errno != 0 or tmp == address+1 or *tmp != '\0'
1257
or tmpmax != (uint16_t)tmpmax){
1077
ret = sscanf(address+1, "%" SCNdMAX "%n", &tmpmax, &numchars);
1078
if(ret < 1 or tmpmax != (uint16_t)tmpmax
1079
or address[numchars+1] != '\0'){
1258
1080
fprintf(stderr, "Bad port number\n");
1259
1081
exitcode = EXIT_FAILURE;
1260
1082
goto end;
1261
1083
}
1262
1263
if(quit_now){
1264
goto end;
1265
}
1266
1267
1084
port = (uint16_t)tmpmax;
1268
1085
*address = '\0';
1269
1086
address = connect_to;
1270
/* Colon in address indicates IPv6 */
1271
int af;
1272
if(strchr(address, ':') != NULL){
1273
af = AF_INET6;
1274
} else {
1275
af = AF_INET;
1276
}
1277
1278
if(quit_now){
1279
goto end;
1280
}
1281
1282
ret = start_mandos_communication(address, port, if_index, af);
1087
ret = start_mandos_communication(address, port, if_index, &mc);
1283
1088
if(ret < 0){
1284
1089
exitcode = EXIT_FAILURE;
1285
1090
} else {
1288
1093
goto end;
1289
1094
}
1290
1095
1291
if(quit_now){
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;
1292
1108
goto end;
1293
1109
}
1294
1110
1318
1134
goto end;
1319
1135
}
1320
1136
1321
if(quit_now){
1322
goto end;
1323
}
1324
1325
1137
/* Create the Avahi service browser */
1326
1138
sb = avahi_s_service_browser_new(mc.server, if_index,
1327
AVAHI_PROTO_UNSPEC, "_mandos._tcp",
1328
NULL, 0, browse_callback, NULL);
1139
AVAHI_PROTO_INET6, "_mandos._tcp",
1140
NULL, 0, browse_callback, &mc);
1329
1141
if(sb == NULL){
1330
1142
fprintf(stderr, "Failed to create service browser: %s\n",
1331
1143
avahi_strerror(avahi_server_errno(mc.server)));
1333
1145
goto end;
1334
1146
}
1335
1147
1336
if(quit_now){
1337
goto end;
1338
}
1339
1340
1148
/* Run the main loop */
1341
1149
1342
1150
if(debug){
1371
1179
gpgme_release(mc.ctx);
1372
1180
}
1373
1181
1374
/* Take down the network interface */
1375
if(take_down_interface){
1376
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1377
if(ret == -1){
1378
perror("ioctl SIOCGIFFLAGS");
1379
} else if(network.ifr_flags & IFF_UP) {
1380
network.ifr_flags &= ~IFF_UP; /* clear flag */
1381
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1382
if(ret == -1){
1383
perror("ioctl SIOCSIFFLAGS");
1384
}
1385
}
1386
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1387
if(ret == -1){
1388
perror("close");
1389
}
1390
}
1391
1392
1182
/* Removes the temp directory used by GPGME */
1393
1183
if(tempdir_created){
1394
1184
DIR *d;
1433
1223
}
1434
1224
}
1435
1225
1436
if(quit_now){
1437
ret = sigaction(signal_received, &old_sigterm_action, NULL);
1438
if(ret == -1){
1439
perror("sigaction");
1440
}
1441
raise(signal_received);
1442
}
1443
1444
1226
return exitcode;
1445
1227
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0