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- Committer: Teddy Hogeborn
- Date: 2009-02-07 04:50:39 UTC
- Revision ID: teddy@fukt.bsnet.se-20090207045039-xkr6b80vtqwqrq8l
* Makefile (install-client-nokey): Move "initramfs-tools-script" from
"/scripts/local-top/mandos" to
"/scripts/init-premount/mandos".
(uninstall-client): - '' -
* debian/mandos-client.dirs: - '' -
* initramfs-tools-script (PREREQ): Added "udev".
"/scripts/local-top/mandos" to
"/scripts/init-premount/mandos".
(uninstall-client): - '' -
* debian/mandos-client.dirs: - '' -
* initramfs-tools-script (PREREQ): Added "udev".
- 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, sigaction,
84
sig_atomic_t */
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));
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
}
517
509
/* Called when a Mandos server is found */
518
510
static int start_mandos_communication(const char *ip, uint16_t port,
519
511
AvahiIfIndex if_index,
520
int af){
512
mandos_context *mc){
521
513
int ret, tcp_sd;
522
514
ssize_t sret;
523
union {
524
struct sockaddr_in in;
525
struct sockaddr_in6 in6;
526
} to;
515
union { struct sockaddr in; struct sockaddr_in6 in6; } to;
527
516
char *buffer = NULL;
528
517
char *decrypted_buffer;
529
518
size_t buffer_length = 0;
531
520
ssize_t decrypted_buffer_size;
532
521
size_t written;
533
522
int retval = 0;
523
char interface[IF_NAMESIZE];
534
524
gnutls_session_t 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);
525
526
ret = init_gnutls_session(mc, &session);
550
527
if(ret != 0){
551
528
return -1;
552
529
}
553
530
554
531
if(debug){
555
fprintf(stderr, "Setting up a TCP connection to %s, port %" PRIu16
532
fprintf(stderr, "Setting up a tcp connection to %s, port %" PRIu16
556
533
"\n", ip, port);
557
534
}
558
535
559
tcp_sd = socket(pf, SOCK_STREAM, 0);
536
tcp_sd = socket(PF_INET6, SOCK_STREAM, 0);
560
537
if(tcp_sd < 0){
561
538
perror("socket");
562
539
return -1;
563
540
}
564
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
565
550
memset(&to, 0, sizeof(to));
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
}
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);
573
555
if(ret < 0 ){
574
556
perror("inet_pton");
575
557
return -1;
578
560
fprintf(stderr, "Bad address: %s\n", ip);
579
561
return -1;
580
562
}
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
563
to.in6.sin6_port = htons(port); /* Spurious warnings from
599
564
-Wconversion and
600
565
-Wunreachable-code */
601
}
566
567
to.in6.sin6_scope_id = (uint32_t)if_index;
602
568
603
569
if(debug){
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){
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){
627
575
perror("inet_ntop");
628
576
} else {
629
577
if(strcmp(addrstr, ip) != 0){
632
580
}
633
581
}
634
582
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
}
583
ret = connect(tcp_sd, &to.in, sizeof(to));
640
584
if(ret < 0){
641
585
perror("connect");
642
586
return -1;
688
632
/* Read OpenPGP packet that contains the wanted password */
689
633
690
634
if(debug){
691
fprintf(stderr, "Retrieving OpenPGP encrypted password from %s\n",
635
fprintf(stderr, "Retrieving pgp encrypted password from %s\n",
692
636
ip);
693
637
}
694
638
695
639
while(true){
696
buffer_capacity = incbuffer(&buffer, buffer_length,
640
buffer_capacity = adjustbuffer(&buffer, buffer_length,
697
641
buffer_capacity);
698
642
if(buffer_capacity == 0){
699
perror("incbuffer");
643
perror("adjustbuffer");
700
644
retval = -1;
701
645
goto mandos_end;
702
646
}
741
685
gnutls_bye(session, GNUTLS_SHUT_RDWR);
742
686
743
687
if(buffer_length > 0){
744
decrypted_buffer_size = pgp_packet_decrypt(buffer,
688
decrypted_buffer_size = pgp_packet_decrypt(mc, buffer,
745
689
buffer_length,
746
690
&decrypted_buffer);
747
691
if(decrypted_buffer_size >= 0){
782
726
783
727
static void resolve_callback(AvahiSServiceResolver *r,
784
728
AvahiIfIndex interface,
785
AvahiProtocol proto,
729
AVAHI_GCC_UNUSED AvahiProtocol protocol,
786
730
AvahiResolverEvent event,
787
731
const char *name,
788
732
const char *type,
793
737
AVAHI_GCC_UNUSED AvahiStringList *txt,
794
738
AVAHI_GCC_UNUSED AvahiLookupResultFlags
795
739
flags,
796
AVAHI_GCC_UNUSED void* userdata){
740
void* userdata){
741
mandos_context *mc = userdata;
797
742
assert(r);
798
743
799
744
/* Called whenever a service has been resolved successfully or
804
749
case AVAHI_RESOLVER_FAILURE:
805
750
fprintf(stderr, "(Avahi Resolver) Failed to resolve service '%s'"
806
751
" of type '%s' in domain '%s': %s\n", name, type, domain,
807
avahi_strerror(avahi_server_errno(mc.server)));
752
avahi_strerror(avahi_server_errno(mc->server)));
808
753
break;
809
754
810
755
case AVAHI_RESOLVER_FOUND:
816
761
PRIdMAX ") on port %" PRIu16 "\n", name, host_name,
817
762
ip, (intmax_t)interface, port);
818
763
}
819
int ret = start_mandos_communication(ip, port, interface,
820
avahi_proto_to_af(proto));
764
int ret = start_mandos_communication(ip, port, interface, mc);
821
765
if(ret == 0){
822
avahi_simple_poll_quit(mc.simple_poll);
766
avahi_simple_poll_quit(mc->simple_poll);
823
767
}
824
768
}
825
769
}
835
779
const char *domain,
836
780
AVAHI_GCC_UNUSED AvahiLookupResultFlags
837
781
flags,
838
AVAHI_GCC_UNUSED void* userdata){
782
void* userdata){
783
mandos_context *mc = userdata;
839
784
assert(b);
840
785
841
786
/* Called whenever a new services becomes available on the LAN or
846
791
case AVAHI_BROWSER_FAILURE:
847
792
848
793
fprintf(stderr, "(Avahi browser) %s\n",
849
avahi_strerror(avahi_server_errno(mc.server)));
850
avahi_simple_poll_quit(mc.simple_poll);
794
avahi_strerror(avahi_server_errno(mc->server)));
795
avahi_simple_poll_quit(mc->simple_poll);
851
796
return;
852
797
853
798
case AVAHI_BROWSER_NEW:
856
801
the callback function is called the Avahi server will free the
857
802
resolver for us. */
858
803
859
if(avahi_s_service_resolver_new(mc.server, interface, protocol,
860
name, type, domain, protocol, 0,
861
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)))
862
808
fprintf(stderr, "Avahi: Failed to resolve service '%s': %s\n",
863
name, avahi_strerror(avahi_server_errno(mc.server)));
809
name, avahi_strerror(avahi_server_errno(mc->server)));
864
810
break;
865
811
866
812
case AVAHI_BROWSER_REMOVE:
875
821
}
876
822
}
877
823
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
893
824
int main(int argc, char *argv[]){
894
825
AvahiSServiceBrowser *sb = NULL;
895
826
int error;
896
827
int ret;
897
828
intmax_t tmpmax;
898
char *tmp;
829
int numchars;
899
830
int exitcode = EXIT_SUCCESS;
900
831
const char *interface = "eth0";
901
832
struct ifreq network;
902
int sd = -1;
903
bool interface_taken_up = false;
833
int sd;
904
834
uid_t uid;
905
835
gid_t gid;
906
836
char *connect_to = NULL;
910
840
const char *seckey = PATHDIR "/" SECKEY;
911
841
const char *pubkey = PATHDIR "/" PUBKEY;
912
842
843
mandos_context mc = { .simple_poll = NULL, .server = NULL,
844
.dh_bits = 1024, .priority = "SECURE256"
845
":!CTYPE-X.509:+CTYPE-OPENPGP" };
913
846
bool gnutls_initialized = false;
914
847
bool gpgme_initialized = false;
915
float delay = 2.5f;
916
917
struct sigaction old_sigterm_action;
918
struct sigaction sigterm_action = { .sa_handler = handle_sigterm };
848
double delay = 2.5;
919
849
920
850
{
921
851
struct argp_option options[] = {
927
857
.group = 1 },
928
858
{ .name = "interface", .key = 'i',
929
859
.arg = "NAME",
930
.doc = "Network interface that will be used to search for"
931
" Mandos servers",
860
.doc = "Interface that will be used to search for Mandos"
861
" servers",
932
862
.group = 1 },
933
863
{ .name = "seckey", .key = 's',
934
864
.arg = "FILE",
973
903
pubkey = arg;
974
904
break;
975
905
case 129: /* --dh-bits */
976
errno = 0;
977
tmpmax = strtoimax(arg, &tmp, 10);
978
if(errno != 0 or tmp == arg or *tmp != '\0'
979
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'){
980
909
fprintf(stderr, "Bad number of DH bits\n");
981
910
exit(EXIT_FAILURE);
982
911
}
986
915
mc.priority = arg;
987
916
break;
988
917
case 131: /* --delay */
989
errno = 0;
990
delay = strtof(arg, &tmp);
991
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'){
992
920
fprintf(stderr, "Bad delay\n");
993
921
exit(EXIT_FAILURE);
994
922
}
1015
943
}
1016
944
}
1017
945
1018
if(not debug){
1019
avahi_set_log_function(empty_log);
1020
}
1021
1022
/* Initialize Avahi early so avahi_simple_poll_quit() can be called
1023
from the signal handler */
1024
/* Initialize the pseudo-RNG for Avahi */
1025
srand((unsigned int) time(NULL));
1026
mc.simple_poll = avahi_simple_poll_new();
1027
if(mc.simple_poll == NULL){
1028
fprintf(stderr, "Avahi: Failed to create simple poll object.\n");
1029
exitcode = EXIT_FAILURE;
1030
goto end;
1031
}
1032
1033
sigemptyset(&sigterm_action.sa_mask);
1034
ret = sigaddset(&sigterm_action.sa_mask, SIGINT);
1035
if(ret == -1){
1036
perror("sigaddset");
1037
exitcode = EXIT_FAILURE;
1038
goto end;
1039
}
1040
ret = sigaddset(&sigterm_action.sa_mask, SIGHUP);
1041
if(ret == -1){
1042
perror("sigaddset");
1043
exitcode = EXIT_FAILURE;
1044
goto end;
1045
}
1046
ret = sigaddset(&sigterm_action.sa_mask, SIGTERM);
1047
if(ret == -1){
1048
perror("sigaddset");
1049
exitcode = EXIT_FAILURE;
1050
goto end;
1051
}
1052
ret = sigaction(SIGTERM, &sigterm_action, &old_sigterm_action);
1053
if(ret == -1){
1054
perror("sigaction");
1055
exitcode = EXIT_FAILURE;
1056
goto end;
1057
}
1058
1059
946
/* If the interface is down, bring it up */
1060
if(interface[0] != '\0'){
947
{
1061
948
#ifdef __linux__
1062
949
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1063
950
messages to mess up the prompt */
1064
951
ret = klogctl(8, NULL, 5);
1065
bool restore_loglevel = true;
1066
952
if(ret == -1){
1067
restore_loglevel = false;
1068
953
perror("klogctl");
1069
954
}
1070
#endif /* __linux__ */
955
#endif
1071
956
1072
957
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1073
958
if(sd < 0){
1074
959
perror("socket");
1075
960
exitcode = EXIT_FAILURE;
1076
961
#ifdef __linux__
1077
if(restore_loglevel){
1078
ret = klogctl(7, NULL, 0);
1079
if(ret == -1){
1080
perror("klogctl");
1081
}
962
ret = klogctl(7, NULL, 0);
963
if(ret == -1){
964
perror("klogctl");
1082
965
}
1083
#endif /* __linux__ */
966
#endif
1084
967
goto end;
1085
968
}
1086
969
strcpy(network.ifr_name, interface);
1088
971
if(ret == -1){
1089
972
perror("ioctl SIOCGIFFLAGS");
1090
973
#ifdef __linux__
1091
if(restore_loglevel){
1092
ret = klogctl(7, NULL, 0);
1093
if(ret == -1){
1094
perror("klogctl");
1095
}
974
ret = klogctl(7, NULL, 0);
975
if(ret == -1){
976
perror("klogctl");
1096
977
}
1097
#endif /* __linux__ */
978
#endif
1098
979
exitcode = EXIT_FAILURE;
1099
980
goto end;
1100
981
}
1105
986
perror("ioctl SIOCSIFFLAGS");
1106
987
exitcode = EXIT_FAILURE;
1107
988
#ifdef __linux__
1108
if(restore_loglevel){
1109
ret = klogctl(7, NULL, 0);
1110
if(ret == -1){
1111
perror("klogctl");
1112
}
989
ret = klogctl(7, NULL, 0);
990
if(ret == -1){
991
perror("klogctl");
1113
992
}
1114
#endif /* __linux__ */
993
#endif
1115
994
goto end;
1116
995
}
1117
interface_taken_up = true;
1118
996
}
1119
997
/* sleep checking until interface is running */
1120
998
for(int i=0; i < delay * 4; i++){
1130
1008
perror("nanosleep");
1131
1009
}
1132
1010
}
1133
if(not interface_taken_up){
1134
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1135
if(ret == -1){
1136
perror("close");
1137
}
1011
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1012
if(ret == -1){
1013
perror("close");
1138
1014
}
1139
1015
#ifdef __linux__
1140
if(restore_loglevel){
1141
/* Restores kernel loglevel to default */
1142
ret = klogctl(7, NULL, 0);
1143
if(ret == -1){
1144
perror("klogctl");
1145
}
1016
/* Restores kernel loglevel to default */
1017
ret = klogctl(7, NULL, 0);
1018
if(ret == -1){
1019
perror("klogctl");
1146
1020
}
1147
#endif /* __linux__ */
1021
#endif
1148
1022
}
1149
1023
1150
1024
uid = getuid();
1151
1025
gid = getgid();
1152
1026
1153
errno = 0;
1154
1027
setgid(gid);
1155
1028
if(ret == -1){
1156
1029
perror("setgid");
1161
1034
perror("setuid");
1162
1035
}
1163
1036
1164
ret = init_gnutls_global(pubkey, seckey);
1037
ret = init_gnutls_global(&mc, pubkey, seckey);
1165
1038
if(ret == -1){
1166
1039
fprintf(stderr, "init_gnutls_global failed\n");
1167
1040
exitcode = EXIT_FAILURE;
1176
1049
}
1177
1050
tempdir_created = true;
1178
1051
1179
if(not init_gpgme(pubkey, seckey, tempdir)){
1052
if(not init_gpgme(&mc, pubkey, seckey, tempdir)){
1180
1053
fprintf(stderr, "init_gpgme failed\n");
1181
1054
exitcode = EXIT_FAILURE;
1182
1055
goto end;
1184
1057
gpgme_initialized = true;
1185
1058
}
1186
1059
1187
if(interface[0] != '\0'){
1188
if_index = (AvahiIfIndex) if_nametoindex(interface);
1189
if(if_index == 0){
1190
fprintf(stderr, "No such interface: \"%s\"\n", interface);
1191
exitcode = EXIT_FAILURE;
1192
goto end;
1193
}
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;
1194
1065
}
1195
1066
1196
1067
if(connect_to != NULL){
1203
1074
goto end;
1204
1075
}
1205
1076
uint16_t port;
1206
errno = 0;
1207
tmpmax = strtoimax(address+1, &tmp, 10);
1208
if(errno != 0 or tmp == address+1 or *tmp != '\0'
1209
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'){
1210
1080
fprintf(stderr, "Bad port number\n");
1211
1081
exitcode = EXIT_FAILURE;
1212
1082
goto end;
1214
1084
port = (uint16_t)tmpmax;
1215
1085
*address = '\0';
1216
1086
address = connect_to;
1217
/* Colon in address indicates IPv6 */
1218
int af;
1219
if(strchr(address, ':') != NULL){
1220
af = AF_INET6;
1221
} else {
1222
af = AF_INET;
1223
}
1224
ret = start_mandos_communication(address, port, if_index, af);
1087
ret = start_mandos_communication(address, port, if_index, &mc);
1225
1088
if(ret < 0){
1226
1089
exitcode = EXIT_FAILURE;
1227
1090
} else {
1229
1092
}
1230
1093
goto end;
1231
1094
}
1232
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
1233
1111
{
1234
1112
AvahiServerConfig config;
1235
1113
/* Do not publish any local Zeroconf records */
1258
1136
1259
1137
/* Create the Avahi service browser */
1260
1138
sb = avahi_s_service_browser_new(mc.server, if_index,
1261
AVAHI_PROTO_UNSPEC, "_mandos._tcp",
1262
NULL, 0, browse_callback, NULL);
1139
AVAHI_PROTO_INET6, "_mandos._tcp",
1140
NULL, 0, browse_callback, &mc);
1263
1141
if(sb == NULL){
1264
1142
fprintf(stderr, "Failed to create service browser: %s\n",
1265
1143
avahi_strerror(avahi_server_errno(mc.server)));
1301
1179
gpgme_release(mc.ctx);
1302
1180
}
1303
1181
1304
/* Take down the network interface */
1305
if(interface_taken_up){
1306
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1307
if(ret == -1){
1308
perror("ioctl SIOCGIFFLAGS");
1309
} else if(network.ifr_flags & IFF_UP) {
1310
network.ifr_flags &= ~IFF_UP; /* clear flag */
1311
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1312
if(ret == -1){
1313
perror("ioctl SIOCSIFFLAGS");
1314
}
1315
}
1316
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1317
if(ret == -1){
1318
perror("close");
1319
}
1320
}
1321
1322
1182
/* Removes the temp directory used by GPGME */
1323
1183
if(tempdir_created){
1324
1184
DIR *d;
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0