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- Committer: Teddy Hogeborn
- Date: 2009-01-10 06:00:50 UTC
- Revision ID: teddy@fukt.bsnet.se-20090110060050-6v5y342fit0233pg
* plugins.d/askpass-fifo.c: Fix name in header.
* plugins.d/mandos-client.c: - '' -
* plugins.d/password-prompt.c: - '' -
* plugins.d/splashy.c: - '' -
* plugins.d/usplash.c: - '' -
* plugins.d/mandos-client.c: - '' -
* plugins.d/password-prompt.c: - '' -
* plugins.d/splashy.c: - '' -
* plugins.d/usplash.c: - '' -
- files removed:
- debian/watch
- files renamed:
- mandos-ctl => mandos-list
- files modified:
- INSTALL
added
removed
plugins.d/mandos-client.c
36
36
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), asprintf() */
37
37
38
38
#include <stdio.h> /* fprintf(), stderr, fwrite(),
39
stdout, ferror(), sscanf(),
40
remove() */
39
stdout, ferror() */
41
40
#include <stdint.h> /* uint16_t, uint32_t */
42
41
#include <stddef.h> /* NULL, size_t, ssize_t */
43
42
#include <stdlib.h> /* free(), EXIT_SUCCESS, EXIT_FAILURE,
49
48
#include <sys/types.h> /* socket(), inet_pton(), sockaddr,
50
49
sockaddr_in6, PF_INET6,
51
50
SOCK_STREAM, INET6_ADDRSTRLEN,
52
uid_t, gid_t, open(), opendir(),
53
DIR */
51
uid_t, gid_t, open(), opendir(), DIR */
54
52
#include <sys/stat.h> /* open() */
55
53
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
56
54
struct in6_addr, inet_pton(),
57
55
connect() */
58
56
#include <fcntl.h> /* open() */
59
#include <dirent.h> /* opendir(), struct dirent, readdir()
60
*/
61
#include <inttypes.h> /* PRIu16, intmax_t, SCNdMAX */
57
#include <dirent.h> /* opendir(), struct dirent, readdir() */
58
#include <inttypes.h> /* PRIu16 */
62
59
#include <assert.h> /* assert() */
63
60
#include <errno.h> /* perror(), errno */
64
#include <time.h> /* nanosleep(), time() */
61
#include <time.h> /* time() */
65
62
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
66
63
SIOCSIFFLAGS, if_indextoname(),
67
64
if_nametoindex(), IF_NAMESIZE */
70
67
getuid(), getgid(), setuid(),
71
68
setgid() */
72
69
#include <arpa/inet.h> /* inet_pton(), htons */
73
#include <iso646.h> /* not, and, or */
70
#include <iso646.h> /* not, and */
74
71
#include <argp.h> /* struct argp_option, error_t, struct
75
72
argp_state, struct argp,
76
73
argp_parse(), ARGP_KEY_ARG,
77
74
ARGP_KEY_END, ARGP_ERR_UNKNOWN */
78
#ifdef __linux__
79
#include <sys/klog.h> /* klogctl() */
80
#endif
81
75
82
76
/* Avahi */
83
77
/* All Avahi types, constants and functions
96
90
gnutls_*
97
91
init_gnutls_session(),
98
92
GNUTLS_* */
99
#include <gnutls/openpgp.h>
100
/* gnutls_certificate_set_openpgp_key_file(),
93
#include <gnutls/openpgp.h> /* gnutls_certificate_set_openpgp_key_file(),
101
94
GNUTLS_OPENPGP_FMT_BASE64 */
102
95
103
96
/* GPGME */
136
129
*/
137
130
size_t adjustbuffer(char **buffer, size_t buffer_length,
138
131
size_t buffer_capacity){
139
if(buffer_length + BUFFER_SIZE > buffer_capacity){
132
if (buffer_length + BUFFER_SIZE > buffer_capacity){
140
133
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
141
if(buffer == NULL){
134
if (buffer == NULL){
142
135
return 0;
143
136
}
144
137
buffer_capacity += BUFFER_SIZE;
157
150
158
151
159
152
/*
160
* Helper function to insert pub and seckey to the engine keyring.
153
* Helper function to insert pub and seckey to the enigne keyring.
161
154
*/
162
155
bool import_key(const char *filename){
163
156
int fd;
170
163
}
171
164
172
165
rc = gpgme_data_new_from_fd(&pgp_data, fd);
173
if(rc != GPG_ERR_NO_ERROR){
166
if (rc != GPG_ERR_NO_ERROR){
174
167
fprintf(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
175
168
gpgme_strsource(rc), gpgme_strerror(rc));
176
169
return false;
177
170
}
178
171
179
172
rc = gpgme_op_import(mc->ctx, pgp_data);
180
if(rc != GPG_ERR_NO_ERROR){
173
if (rc != GPG_ERR_NO_ERROR){
181
174
fprintf(stderr, "bad gpgme_op_import: %s: %s\n",
182
175
gpgme_strsource(rc), gpgme_strerror(rc));
183
176
return false;
191
184
return true;
192
185
}
193
186
194
if(debug){
187
if (debug){
195
188
fprintf(stderr, "Initialize gpgme\n");
196
189
}
197
190
198
191
/* Init GPGME */
199
192
gpgme_check_version(NULL);
200
193
rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
201
if(rc != GPG_ERR_NO_ERROR){
194
if (rc != GPG_ERR_NO_ERROR){
202
195
fprintf(stderr, "bad gpgme_engine_check_version: %s: %s\n",
203
196
gpgme_strsource(rc), gpgme_strerror(rc));
204
197
return false;
205
198
}
206
199
207
200
/* Set GPGME home directory for the OpenPGP engine only */
208
rc = gpgme_get_engine_info(&engine_info);
209
if(rc != GPG_ERR_NO_ERROR){
201
rc = gpgme_get_engine_info (&engine_info);
202
if (rc != GPG_ERR_NO_ERROR){
210
203
fprintf(stderr, "bad gpgme_get_engine_info: %s: %s\n",
211
204
gpgme_strsource(rc), gpgme_strerror(rc));
212
205
return false;
226
219
227
220
/* Create new GPGME "context" */
228
221
rc = gpgme_new(&(mc->ctx));
229
if(rc != GPG_ERR_NO_ERROR){
222
if (rc != GPG_ERR_NO_ERROR){
230
223
fprintf(stderr, "bad gpgme_new: %s: %s\n",
231
224
gpgme_strsource(rc), gpgme_strerror(rc));
232
225
return false;
233
226
}
234
227
235
if(not import_key(pubkey) or not import_key(seckey)){
228
if (not import_key(pubkey) or not import_key(seckey)){
236
229
return false;
237
230
}
238
231
243
236
* Decrypt OpenPGP data.
244
237
* Returns -1 on error
245
238
*/
246
static ssize_t pgp_packet_decrypt(const mandos_context *mc,
247
const char *cryptotext,
248
size_t crypto_size,
249
char **plaintext){
239
static ssize_t pgp_packet_decrypt (const mandos_context *mc,
240
const char *cryptotext,
241
size_t crypto_size,
242
char **plaintext){
250
243
gpgme_data_t dh_crypto, dh_plain;
251
244
gpgme_error_t rc;
252
245
ssize_t ret;
253
246
size_t plaintext_capacity = 0;
254
247
ssize_t plaintext_length = 0;
255
248
256
if(debug){
249
if (debug){
257
250
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
258
251
}
259
252
260
253
/* Create new GPGME data buffer from memory cryptotext */
261
254
rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,
262
255
0);
263
if(rc != GPG_ERR_NO_ERROR){
256
if (rc != GPG_ERR_NO_ERROR){
264
257
fprintf(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
265
258
gpgme_strsource(rc), gpgme_strerror(rc));
266
259
return -1;
268
261
269
262
/* Create new empty GPGME data buffer for the plaintext */
270
263
rc = gpgme_data_new(&dh_plain);
271
if(rc != GPG_ERR_NO_ERROR){
264
if (rc != GPG_ERR_NO_ERROR){
272
265
fprintf(stderr, "bad gpgme_data_new: %s: %s\n",
273
266
gpgme_strsource(rc), gpgme_strerror(rc));
274
267
gpgme_data_release(dh_crypto);
278
271
/* Decrypt data from the cryptotext data buffer to the plaintext
279
272
data buffer */
280
273
rc = gpgme_op_decrypt(mc->ctx, dh_crypto, dh_plain);
281
if(rc != GPG_ERR_NO_ERROR){
274
if (rc != GPG_ERR_NO_ERROR){
282
275
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
283
276
gpgme_strsource(rc), gpgme_strerror(rc));
284
277
plaintext_length = -1;
285
if(debug){
278
if (debug){
286
279
gpgme_decrypt_result_t result;
287
280
result = gpgme_op_decrypt_result(mc->ctx);
288
if(result == NULL){
281
if (result == NULL){
289
282
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
290
283
} else {
291
284
fprintf(stderr, "Unsupported algorithm: %s\n",
318
311
}
319
312
320
313
/* Seek back to the beginning of the GPGME plaintext data buffer */
321
if(gpgme_data_seek(dh_plain, (off_t)0, SEEK_SET) == -1){
314
if (gpgme_data_seek(dh_plain, (off_t) 0, SEEK_SET) == -1){
322
315
perror("gpgme_data_seek");
323
316
plaintext_length = -1;
324
317
goto decrypt_end;
329
322
plaintext_capacity = adjustbuffer(plaintext,
330
323
(size_t)plaintext_length,
331
324
plaintext_capacity);
332
if(plaintext_capacity == 0){
325
if (plaintext_capacity == 0){
333
326
perror("adjustbuffer");
334
327
plaintext_length = -1;
335
328
goto decrypt_end;
338
331
ret = gpgme_data_read(dh_plain, *plaintext + plaintext_length,
339
332
BUFFER_SIZE);
340
333
/* Print the data, if any */
341
if(ret == 0){
334
if (ret == 0){
342
335
/* EOF */
343
336
break;
344
337
}
368
361
return plaintext_length;
369
362
}
370
363
371
static const char * safer_gnutls_strerror(int value){
372
const char *ret = gnutls_strerror(value); /* Spurious warning from
373
-Wunreachable-code */
374
if(ret == NULL)
364
static const char * safer_gnutls_strerror (int value) {
365
const char *ret = gnutls_strerror (value); /* Spurious warning */
366
if (ret == NULL)
375
367
ret = "(unknown)";
376
368
return ret;
377
369
}
392
384
}
393
385
394
386
ret = gnutls_global_init();
395
if(ret != GNUTLS_E_SUCCESS){
396
fprintf(stderr, "GnuTLS global_init: %s\n",
397
safer_gnutls_strerror(ret));
387
if (ret != GNUTLS_E_SUCCESS) {
388
fprintf (stderr, "GnuTLS global_init: %s\n",
389
safer_gnutls_strerror(ret));
398
390
return -1;
399
391
}
400
392
401
if(debug){
393
if (debug){
402
394
/* "Use a log level over 10 to enable all debugging options."
403
395
* - GnuTLS manual
404
396
*/
408
400
409
401
/* OpenPGP credentials */
410
402
gnutls_certificate_allocate_credentials(&mc->cred);
411
if(ret != GNUTLS_E_SUCCESS){
412
fprintf(stderr, "GnuTLS memory error: %s\n", /* Spurious warning
413
* from
414
* -Wunreachable-code
415
*/
416
safer_gnutls_strerror(ret));
417
gnutls_global_deinit();
403
if (ret != GNUTLS_E_SUCCESS){
404
fprintf (stderr, "GnuTLS memory error: %s\n", /* Spurious
405
warning */
406
safer_gnutls_strerror(ret));
407
gnutls_global_deinit ();
418
408
return -1;
419
409
}
420
410
427
417
ret = gnutls_certificate_set_openpgp_key_file
428
418
(mc->cred, pubkeyfilename, seckeyfilename,
429
419
GNUTLS_OPENPGP_FMT_BASE64);
430
if(ret != GNUTLS_E_SUCCESS){
420
if (ret != GNUTLS_E_SUCCESS) {
431
421
fprintf(stderr,
432
422
"Error[%d] while reading the OpenPGP key pair ('%s',"
433
423
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
438
428
439
429
/* GnuTLS server initialization */
440
430
ret = gnutls_dh_params_init(&mc->dh_params);
441
if(ret != GNUTLS_E_SUCCESS){
442
fprintf(stderr, "Error in GnuTLS DH parameter initialization:"
443
" %s\n", safer_gnutls_strerror(ret));
431
if (ret != GNUTLS_E_SUCCESS) {
432
fprintf (stderr, "Error in GnuTLS DH parameter initialization:"
433
" %s\n", safer_gnutls_strerror(ret));
444
434
goto globalfail;
445
435
}
446
436
ret = gnutls_dh_params_generate2(mc->dh_params, mc->dh_bits);
447
if(ret != GNUTLS_E_SUCCESS){
448
fprintf(stderr, "Error in GnuTLS prime generation: %s\n",
449
safer_gnutls_strerror(ret));
437
if (ret != GNUTLS_E_SUCCESS) {
438
fprintf (stderr, "Error in GnuTLS prime generation: %s\n",
439
safer_gnutls_strerror(ret));
450
440
goto globalfail;
451
441
}
452
442
467
457
int ret;
468
458
/* GnuTLS session creation */
469
459
ret = gnutls_init(session, GNUTLS_SERVER);
470
if(ret != GNUTLS_E_SUCCESS){
460
if (ret != GNUTLS_E_SUCCESS){
471
461
fprintf(stderr, "Error in GnuTLS session initialization: %s\n",
472
462
safer_gnutls_strerror(ret));
473
463
}
475
465
{
476
466
const char *err;
477
467
ret = gnutls_priority_set_direct(*session, mc->priority, &err);
478
if(ret != GNUTLS_E_SUCCESS){
468
if (ret != GNUTLS_E_SUCCESS) {
479
469
fprintf(stderr, "Syntax error at: %s\n", err);
480
470
fprintf(stderr, "GnuTLS error: %s\n",
481
471
safer_gnutls_strerror(ret));
482
gnutls_deinit(*session);
472
gnutls_deinit (*session);
483
473
return -1;
484
474
}
485
475
}
486
476
487
477
ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,
488
478
mc->cred);
489
if(ret != GNUTLS_E_SUCCESS){
479
if (ret != GNUTLS_E_SUCCESS) {
490
480
fprintf(stderr, "Error setting GnuTLS credentials: %s\n",
491
481
safer_gnutls_strerror(ret));
492
gnutls_deinit(*session);
482
gnutls_deinit (*session);
493
483
return -1;
494
484
}
495
485
496
486
/* ignore client certificate if any. */
497
gnutls_certificate_server_set_request(*session,
498
GNUTLS_CERT_IGNORE);
487
gnutls_certificate_server_set_request (*session,
488
GNUTLS_CERT_IGNORE);
499
489
500
gnutls_dh_set_prime_bits(*session, mc->dh_bits);
490
gnutls_dh_set_prime_bits (*session, mc->dh_bits);
501
491
502
492
return 0;
503
493
}
523
513
char interface[IF_NAMESIZE];
524
514
gnutls_session_t session;
525
515
526
ret = init_gnutls_session(mc, &session);
527
if(ret != 0){
516
ret = init_gnutls_session (mc, &session);
517
if (ret != 0){
528
518
return -1;
529
519
}
530
520
534
524
}
535
525
536
526
tcp_sd = socket(PF_INET6, SOCK_STREAM, 0);
537
if(tcp_sd < 0){
527
if(tcp_sd < 0) {
538
528
perror("socket");
539
529
return -1;
540
530
}
552
542
/* It would be nice to have a way to detect if we were passed an
553
543
IPv4 address here. Now we assume an IPv6 address. */
554
544
ret = inet_pton(AF_INET6, ip, &to.in6.sin6_addr);
555
if(ret < 0 ){
545
if (ret < 0 ){
556
546
perror("inet_pton");
557
547
return -1;
558
548
}
560
550
fprintf(stderr, "Bad address: %s\n", ip);
561
551
return -1;
562
552
}
563
to.in6.sin6_port = htons(port); /* Spurious warnings from
564
-Wconversion and
565
-Wunreachable-code */
553
to.in6.sin6_port = htons(port); /* Spurious warning */
566
554
567
555
to.in6.sin6_scope_id = (uint32_t)if_index;
568
556
581
569
}
582
570
583
571
ret = connect(tcp_sd, &to.in, sizeof(to));
584
if(ret < 0){
572
if (ret < 0){
585
573
perror("connect");
586
574
return -1;
587
575
}
588
576
589
577
const char *out = mandos_protocol_version;
590
578
written = 0;
591
while(true){
579
while (true){
592
580
size_t out_size = strlen(out);
593
581
ret = (int)TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
594
582
out_size - written));
595
if(ret == -1){
583
if (ret == -1){
596
584
perror("write");
597
585
retval = -1;
598
586
goto mandos_end;
601
589
if(written < out_size){
602
590
continue;
603
591
} else {
604
if(out == mandos_protocol_version){
592
if (out == mandos_protocol_version){
605
593
written = 0;
606
594
out = "\r\n";
607
595
} else {
614
602
fprintf(stderr, "Establishing TLS session with %s\n", ip);
615
603
}
616
604
617
gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t) tcp_sd);
605
gnutls_transport_set_ptr (session, (gnutls_transport_ptr_t) tcp_sd);
618
606
619
607
do{
620
ret = gnutls_handshake(session);
608
ret = gnutls_handshake (session);
621
609
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
622
610
623
if(ret != GNUTLS_E_SUCCESS){
611
if (ret != GNUTLS_E_SUCCESS){
624
612
if(debug){
625
613
fprintf(stderr, "*** GnuTLS Handshake failed ***\n");
626
gnutls_perror(ret);
614
gnutls_perror (ret);
627
615
}
628
616
retval = -1;
629
617
goto mandos_end;
639
627
while(true){
640
628
buffer_capacity = adjustbuffer(&buffer, buffer_length,
641
629
buffer_capacity);
642
if(buffer_capacity == 0){
630
if (buffer_capacity == 0){
643
631
perror("adjustbuffer");
644
632
retval = -1;
645
633
goto mandos_end;
647
635
648
636
sret = gnutls_record_recv(session, buffer+buffer_length,
649
637
BUFFER_SIZE);
650
if(sret == 0){
638
if (sret == 0){
651
639
break;
652
640
}
653
if(sret < 0){
641
if (sret < 0){
654
642
switch(sret){
655
643
case GNUTLS_E_INTERRUPTED:
656
644
case GNUTLS_E_AGAIN:
657
645
break;
658
646
case GNUTLS_E_REHANDSHAKE:
659
647
do{
660
ret = gnutls_handshake(session);
648
ret = gnutls_handshake (session);
661
649
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
662
if(ret < 0){
650
if (ret < 0){
663
651
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
664
gnutls_perror(ret);
652
gnutls_perror (ret);
665
653
retval = -1;
666
654
goto mandos_end;
667
655
}
670
658
fprintf(stderr, "Unknown error while reading data from"
671
659
" encrypted session with Mandos server\n");
672
660
retval = -1;
673
gnutls_bye(session, GNUTLS_SHUT_RDWR);
661
gnutls_bye (session, GNUTLS_SHUT_RDWR);
674
662
goto mandos_end;
675
663
}
676
664
} else {
682
670
fprintf(stderr, "Closing TLS session\n");
683
671
}
684
672
685
gnutls_bye(session, GNUTLS_SHUT_RDWR);
673
gnutls_bye (session, GNUTLS_SHUT_RDWR);
686
674
687
if(buffer_length > 0){
675
if (buffer_length > 0){
688
676
decrypted_buffer_size = pgp_packet_decrypt(mc, buffer,
689
677
buffer_length,
690
678
&decrypted_buffer);
691
if(decrypted_buffer_size >= 0){
679
if (decrypted_buffer_size >= 0){
692
680
written = 0;
693
681
while(written < (size_t) decrypted_buffer_size){
694
ret = (int)fwrite(decrypted_buffer + written, 1,
695
(size_t)decrypted_buffer_size - written,
696
stdout);
682
ret = (int)fwrite (decrypted_buffer + written, 1,
683
(size_t)decrypted_buffer_size - written,
684
stdout);
697
685
if(ret == 0 and ferror(stdout)){
698
686
if(debug){
699
687
fprintf(stderr, "Error writing encrypted data: %s\n",
720
708
if(ret == -1){
721
709
perror("close");
722
710
}
723
gnutls_deinit(session);
711
gnutls_deinit (session);
724
712
return retval;
725
713
}
726
714
737
725
AVAHI_GCC_UNUSED AvahiStringList *txt,
738
726
AVAHI_GCC_UNUSED AvahiLookupResultFlags
739
727
flags,
740
void* userdata){
728
void* userdata) {
741
729
mandos_context *mc = userdata;
742
730
assert(r);
743
731
744
732
/* Called whenever a service has been resolved successfully or
745
733
timed out */
746
734
747
switch(event){
735
switch (event) {
748
736
default:
749
737
case AVAHI_RESOLVER_FAILURE:
750
738
fprintf(stderr, "(Avahi Resolver) Failed to resolve service '%s'"
758
746
avahi_address_snprint(ip, sizeof(ip), address);
759
747
if(debug){
760
748
fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %"
761
PRIdMAX ") on port %" PRIu16 "\n", name, host_name,
762
ip, (intmax_t)interface, port);
749
PRIu16 ") on port %d\n", name, host_name, ip,
750
interface, port);
763
751
}
764
752
int ret = start_mandos_communication(ip, port, interface, mc);
765
if(ret == 0){
753
if (ret == 0){
766
754
avahi_simple_poll_quit(mc->simple_poll);
767
755
}
768
756
}
770
758
avahi_s_service_resolver_free(r);
771
759
}
772
760
773
static void browse_callback(AvahiSServiceBrowser *b,
774
AvahiIfIndex interface,
775
AvahiProtocol protocol,
776
AvahiBrowserEvent event,
777
const char *name,
778
const char *type,
779
const char *domain,
780
AVAHI_GCC_UNUSED AvahiLookupResultFlags
781
flags,
782
void* userdata){
761
static void browse_callback( AvahiSServiceBrowser *b,
762
AvahiIfIndex interface,
763
AvahiProtocol protocol,
764
AvahiBrowserEvent event,
765
const char *name,
766
const char *type,
767
const char *domain,
768
AVAHI_GCC_UNUSED AvahiLookupResultFlags
769
flags,
770
void* userdata) {
783
771
mandos_context *mc = userdata;
784
772
assert(b);
785
773
786
774
/* Called whenever a new services becomes available on the LAN or
787
775
is removed from the LAN */
788
776
789
switch(event){
777
switch (event) {
790
778
default:
791
779
case AVAHI_BROWSER_FAILURE:
792
780
801
789
the callback function is called the Avahi server will free the
802
790
resolver for us. */
803
791
804
if(!(avahi_s_service_resolver_new(mc->server, interface,
792
if (!(avahi_s_service_resolver_new(mc->server, interface,
805
793
protocol, name, type, domain,
806
794
AVAHI_PROTO_INET6, 0,
807
795
resolve_callback, mc)))
822
810
}
823
811
824
812
int main(int argc, char *argv[]){
825
AvahiSServiceBrowser *sb = NULL;
826
int error;
827
int ret;
828
intmax_t tmpmax;
829
int numchars;
830
int exitcode = EXIT_SUCCESS;
831
const char *interface = "eth0";
832
struct ifreq network;
833
int sd;
834
uid_t uid;
835
gid_t gid;
836
char *connect_to = NULL;
837
char tempdir[] = "/tmp/mandosXXXXXX";
838
bool tempdir_created = false;
839
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
840
const char *seckey = PATHDIR "/" SECKEY;
841
const char *pubkey = PATHDIR "/" PUBKEY;
842
843
mandos_context mc = { .simple_poll = NULL, .server = NULL,
844
.dh_bits = 1024, .priority = "SECURE256"
845
":!CTYPE-X.509:+CTYPE-OPENPGP" };
846
bool gnutls_initialized = false;
847
bool gpgme_initialized = false;
848
double delay = 2.5;
849
850
{
851
struct argp_option options[] = {
852
{ .name = "debug", .key = 128,
853
.doc = "Debug mode", .group = 3 },
854
{ .name = "connect", .key = 'c',
855
.arg = "ADDRESS:PORT",
856
.doc = "Connect directly to a specific Mandos server",
857
.group = 1 },
858
{ .name = "interface", .key = 'i',
859
.arg = "NAME",
860
.doc = "Interface that will be used to search for Mandos"
861
" servers",
862
.group = 1 },
863
{ .name = "seckey", .key = 's',
864
.arg = "FILE",
865
.doc = "OpenPGP secret key file base name",
866
.group = 1 },
867
{ .name = "pubkey", .key = 'p',
868
.arg = "FILE",
869
.doc = "OpenPGP public key file base name",
870
.group = 2 },
871
{ .name = "dh-bits", .key = 129,
872
.arg = "BITS",
873
.doc = "Bit length of the prime number used in the"
874
" Diffie-Hellman key exchange",
875
.group = 2 },
876
{ .name = "priority", .key = 130,
877
.arg = "STRING",
878
.doc = "GnuTLS priority string for the TLS handshake",
879
.group = 1 },
880
{ .name = "delay", .key = 131,
881
.arg = "SECONDS",
882
.doc = "Maximum delay to wait for interface startup",
883
.group = 2 },
884
{ .name = NULL }
885
};
886
887
error_t parse_opt(int key, char *arg,
888
struct argp_state *state){
889
switch(key){
890
case 128: /* --debug */
891
debug = true;
892
break;
893
case 'c': /* --connect */
894
connect_to = arg;
895
break;
896
case 'i': /* --interface */
897
interface = arg;
898
break;
899
case 's': /* --seckey */
900
seckey = arg;
901
break;
902
case 'p': /* --pubkey */
903
pubkey = arg;
904
break;
905
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'){
909
fprintf(stderr, "Bad number of DH bits\n");
910
exit(EXIT_FAILURE);
911
}
912
mc.dh_bits = (typeof(mc.dh_bits))tmpmax;
913
break;
914
case 130: /* --priority */
915
mc.priority = arg;
916
break;
917
case 131: /* --delay */
918
ret = sscanf(arg, "%lf%n", &delay, &numchars);
919
if(ret < 1 or arg[numchars] != '\0'){
920
fprintf(stderr, "Bad delay\n");
921
exit(EXIT_FAILURE);
922
}
923
break;
924
case ARGP_KEY_ARG:
925
argp_usage(state);
926
case ARGP_KEY_END:
927
break;
928
default:
929
return ARGP_ERR_UNKNOWN;
930
}
931
return 0;
932
}
933
934
struct argp argp = { .options = options, .parser = parse_opt,
935
.args_doc = "",
936
.doc = "Mandos client -- Get and decrypt"
937
" passwords from a Mandos server" };
938
ret = argp_parse(&argp, argc, argv, 0, 0, NULL);
939
if(ret == ARGP_ERR_UNKNOWN){
940
fprintf(stderr, "Unknown error while parsing arguments\n");
941
exitcode = EXIT_FAILURE;
942
goto end;
943
}
944
}
945
946
/* If the interface is down, bring it up */
947
{
948
#ifdef __linux__
949
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
950
messages to mess up the prompt */
951
ret = klogctl(8, NULL, 5);
952
if(ret == -1){
953
perror("klogctl");
954
}
955
#endif
956
957
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
958
if(sd < 0){
959
perror("socket");
960
exitcode = EXIT_FAILURE;
961
#ifdef __linux__
962
ret = klogctl(7, NULL, 0);
963
if(ret == -1){
964
perror("klogctl");
965
}
966
#endif
967
goto end;
968
}
969
strcpy(network.ifr_name, interface);
970
ret = ioctl(sd, SIOCGIFFLAGS, &network);
971
if(ret == -1){
972
perror("ioctl SIOCGIFFLAGS");
973
#ifdef __linux__
974
ret = klogctl(7, NULL, 0);
975
if(ret == -1){
976
perror("klogctl");
977
}
978
#endif
979
exitcode = EXIT_FAILURE;
980
goto end;
981
}
982
if((network.ifr_flags & IFF_UP) == 0){
983
network.ifr_flags |= IFF_UP;
984
ret = ioctl(sd, SIOCSIFFLAGS, &network);
985
if(ret == -1){
986
perror("ioctl SIOCSIFFLAGS");
987
exitcode = EXIT_FAILURE;
988
#ifdef __linux__
989
ret = klogctl(7, NULL, 0);
990
if(ret == -1){
991
perror("klogctl");
992
}
993
#endif
994
goto end;
995
}
996
}
997
/* sleep checking until interface is running */
998
for(int i=0; i < delay * 4; i++){
813
AvahiSServiceBrowser *sb = NULL;
814
int error;
815
int ret;
816
int exitcode = EXIT_SUCCESS;
817
const char *interface = "eth0";
818
struct ifreq network;
819
int sd;
820
uid_t uid;
821
gid_t gid;
822
char *connect_to = NULL;
823
char tempdir[] = "/tmp/mandosXXXXXX";
824
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
825
const char *seckey = PATHDIR "/" SECKEY;
826
const char *pubkey = PATHDIR "/" PUBKEY;
827
828
mandos_context mc = { .simple_poll = NULL, .server = NULL,
829
.dh_bits = 1024, .priority = "SECURE256"
830
":!CTYPE-X.509:+CTYPE-OPENPGP" };
831
bool gnutls_initalized = false;
832
bool gpgme_initalized = false;
833
834
{
835
struct argp_option options[] = {
836
{ .name = "debug", .key = 128,
837
.doc = "Debug mode", .group = 3 },
838
{ .name = "connect", .key = 'c',
839
.arg = "ADDRESS:PORT",
840
.doc = "Connect directly to a specific Mandos server",
841
.group = 1 },
842
{ .name = "interface", .key = 'i',
843
.arg = "NAME",
844
.doc = "Interface that will be used to search for Mandos"
845
" servers",
846
.group = 1 },
847
{ .name = "seckey", .key = 's',
848
.arg = "FILE",
849
.doc = "OpenPGP secret key file base name",
850
.group = 1 },
851
{ .name = "pubkey", .key = 'p',
852
.arg = "FILE",
853
.doc = "OpenPGP public key file base name",
854
.group = 2 },
855
{ .name = "dh-bits", .key = 129,
856
.arg = "BITS",
857
.doc = "Bit length of the prime number used in the"
858
" Diffie-Hellman key exchange",
859
.group = 2 },
860
{ .name = "priority", .key = 130,
861
.arg = "STRING",
862
.doc = "GnuTLS priority string for the TLS handshake",
863
.group = 1 },
864
{ .name = NULL }
865
};
866
867
error_t parse_opt (int key, char *arg,
868
struct argp_state *state) {
869
/* Get the INPUT argument from `argp_parse', which we know is
870
a pointer to our plugin list pointer. */
871
switch (key) {
872
case 128: /* --debug */
873
debug = true;
874
break;
875
case 'c': /* --connect */
876
connect_to = arg;
877
break;
878
case 'i': /* --interface */
879
interface = arg;
880
break;
881
case 's': /* --seckey */
882
seckey = arg;
883
break;
884
case 'p': /* --pubkey */
885
pubkey = arg;
886
break;
887
case 129: /* --dh-bits */
888
errno = 0;
889
mc.dh_bits = (unsigned int) strtol(arg, NULL, 10);
890
if (errno){
891
perror("strtol");
892
exit(EXIT_FAILURE);
893
}
894
break;
895
case 130: /* --priority */
896
mc.priority = arg;
897
break;
898
case ARGP_KEY_ARG:
899
argp_usage (state);
900
case ARGP_KEY_END:
901
break;
902
default:
903
return ARGP_ERR_UNKNOWN;
904
}
905
return 0;
906
}
907
908
struct argp argp = { .options = options, .parser = parse_opt,
909
.args_doc = "",
910
.doc = "Mandos client -- Get and decrypt"
911
" passwords from a Mandos server" };
912
ret = argp_parse (&argp, argc, argv, 0, 0, NULL);
913
if (ret == ARGP_ERR_UNKNOWN){
914
fprintf(stderr, "Unknown error while parsing arguments\n");
915
exitcode = EXIT_FAILURE;
916
goto end;
917
}
918
}
919
920
/* If the interface is down, bring it up */
921
{
922
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
923
if(sd < 0) {
924
perror("socket");
925
exitcode = EXIT_FAILURE;
926
goto end;
927
}
928
strcpy(network.ifr_name, interface);
999
929
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1000
930
if(ret == -1){
1001
931
perror("ioctl SIOCGIFFLAGS");
1002
} else if(network.ifr_flags & IFF_RUNNING){
1003
break;
1004
}
1005
struct timespec sleeptime = { .tv_nsec = 250000000 };
1006
ret = nanosleep(&sleeptime, NULL);
1007
if(ret == -1 and errno != EINTR){
1008
perror("nanosleep");
1009
}
1010
}
1011
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1012
if(ret == -1){
1013
perror("close");
1014
}
1015
#ifdef __linux__
1016
/* Restores kernel loglevel to default */
1017
ret = klogctl(7, NULL, 0);
1018
if(ret == -1){
1019
perror("klogctl");
1020
}
1021
#endif
1022
}
1023
1024
uid = getuid();
1025
gid = getgid();
1026
1027
setgid(gid);
1028
if(ret == -1){
1029
perror("setgid");
1030
}
1031
1032
ret = setuid(uid);
1033
if(ret == -1){
1034
perror("setuid");
1035
}
1036
1037
ret = init_gnutls_global(&mc, pubkey, seckey);
1038
if(ret == -1){
1039
fprintf(stderr, "init_gnutls_global failed\n");
1040
exitcode = EXIT_FAILURE;
1041
goto end;
1042
} else {
1043
gnutls_initialized = true;
1044
}
1045
1046
if(mkdtemp(tempdir) == NULL){
1047
perror("mkdtemp");
1048
goto end;
1049
}
1050
tempdir_created = true;
1051
1052
if(not init_gpgme(&mc, pubkey, seckey, tempdir)){
1053
fprintf(stderr, "init_gpgme failed\n");
1054
exitcode = EXIT_FAILURE;
1055
goto end;
1056
} else {
1057
gpgme_initialized = true;
1058
}
1059
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;
1065
}
1066
1067
if(connect_to != NULL){
1068
/* Connect directly, do not use Zeroconf */
1069
/* (Mainly meant for debugging) */
1070
char *address = strrchr(connect_to, ':');
1071
if(address == NULL){
1072
fprintf(stderr, "No colon in address\n");
1073
exitcode = EXIT_FAILURE;
1074
goto end;
1075
}
1076
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'){
1080
fprintf(stderr, "Bad port number\n");
1081
exitcode = EXIT_FAILURE;
1082
goto end;
1083
}
1084
port = (uint16_t)tmpmax;
1085
*address = '\0';
1086
address = connect_to;
1087
ret = start_mandos_communication(address, port, if_index, &mc);
1088
if(ret < 0){
1089
exitcode = EXIT_FAILURE;
1090
} else {
1091
exitcode = EXIT_SUCCESS;
1092
}
1093
goto end;
1094
}
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
1111
{
1112
AvahiServerConfig config;
1113
/* Do not publish any local Zeroconf records */
1114
avahi_server_config_init(&config);
1115
config.publish_hinfo = 0;
1116
config.publish_addresses = 0;
1117
config.publish_workstation = 0;
1118
config.publish_domain = 0;
1119
1120
/* Allocate a new server */
1121
mc.server = avahi_server_new(avahi_simple_poll_get
1122
(mc.simple_poll), &config, NULL,
1123
NULL, &error);
1124
1125
/* Free the Avahi configuration data */
1126
avahi_server_config_free(&config);
1127
}
1128
1129
/* Check if creating the Avahi server object succeeded */
1130
if(mc.server == NULL){
1131
fprintf(stderr, "Failed to create Avahi server: %s\n",
1132
avahi_strerror(error));
1133
exitcode = EXIT_FAILURE;
1134
goto end;
1135
}
1136
1137
/* Create the Avahi service browser */
1138
sb = avahi_s_service_browser_new(mc.server, if_index,
1139
AVAHI_PROTO_INET6, "_mandos._tcp",
1140
NULL, 0, browse_callback, &mc);
1141
if(sb == NULL){
1142
fprintf(stderr, "Failed to create service browser: %s\n",
1143
avahi_strerror(avahi_server_errno(mc.server)));
1144
exitcode = EXIT_FAILURE;
1145
goto end;
1146
}
1147
1148
/* Run the main loop */
1149
1150
if(debug){
1151
fprintf(stderr, "Starting Avahi loop search\n");
1152
}
1153
1154
avahi_simple_poll_loop(mc.simple_poll);
1155
932
exitcode = EXIT_FAILURE;
933
goto end;
934
}
935
if((network.ifr_flags & IFF_UP) == 0){
936
network.ifr_flags |= IFF_UP;
937
ret = ioctl(sd, SIOCSIFFLAGS, &network);
938
if(ret == -1){
939
perror("ioctl SIOCSIFFLAGS");
940
exitcode = EXIT_FAILURE;
941
goto end;
942
}
943
}
944
ret = (int)TEMP_FAILURE_RETRY(close(sd));
945
if(ret == -1){
946
perror("close");
947
}
948
}
949
950
uid = getuid();
951
gid = getgid();
952
953
ret = setuid(uid);
954
if (ret == -1){
955
perror("setuid");
956
}
957
958
setgid(gid);
959
if (ret == -1){
960
perror("setgid");
961
}
962
963
ret = init_gnutls_global(&mc, pubkey, seckey);
964
if (ret == -1){
965
fprintf(stderr, "init_gnutls_global failed\n");
966
exitcode = EXIT_FAILURE;
967
goto end;
968
} else {
969
gnutls_initalized = true;
970
}
971
972
if(mkdtemp(tempdir) == NULL){
973
perror("mkdtemp");
974
tempdir[0] = '\0';
975
goto end;
976
}
977
978
if(not init_gpgme(&mc, pubkey, seckey, tempdir)){
979
fprintf(stderr, "gpgme_initalized failed\n");
980
exitcode = EXIT_FAILURE;
981
goto end;
982
} else {
983
gpgme_initalized = true;
984
}
985
986
if_index = (AvahiIfIndex) if_nametoindex(interface);
987
if(if_index == 0){
988
fprintf(stderr, "No such interface: \"%s\"\n", interface);
989
exit(EXIT_FAILURE);
990
}
991
992
if(connect_to != NULL){
993
/* Connect directly, do not use Zeroconf */
994
/* (Mainly meant for debugging) */
995
char *address = strrchr(connect_to, ':');
996
if(address == NULL){
997
fprintf(stderr, "No colon in address\n");
998
exitcode = EXIT_FAILURE;
999
goto end;
1000
}
1001
errno = 0;
1002
uint16_t port = (uint16_t) strtol(address+1, NULL, 10);
1003
if(errno){
1004
perror("Bad port number");
1005
exitcode = EXIT_FAILURE;
1006
goto end;
1007
}
1008
*address = '\0';
1009
address = connect_to;
1010
ret = start_mandos_communication(address, port, if_index, &mc);
1011
if(ret < 0){
1012
exitcode = EXIT_FAILURE;
1013
} else {
1014
exitcode = EXIT_SUCCESS;
1015
}
1016
goto end;
1017
}
1018
1019
if (not debug){
1020
avahi_set_log_function(empty_log);
1021
}
1022
1023
/* Initialize the pseudo-RNG for Avahi */
1024
srand((unsigned int) time(NULL));
1025
1026
/* Allocate main Avahi loop object */
1027
mc.simple_poll = avahi_simple_poll_new();
1028
if (mc.simple_poll == NULL) {
1029
fprintf(stderr, "Avahi: Failed to create simple poll"
1030
" object.\n");
1031
exitcode = EXIT_FAILURE;
1032
goto end;
1033
}
1034
1035
{
1036
AvahiServerConfig config;
1037
/* Do not publish any local Zeroconf records */
1038
avahi_server_config_init(&config);
1039
config.publish_hinfo = 0;
1040
config.publish_addresses = 0;
1041
config.publish_workstation = 0;
1042
config.publish_domain = 0;
1043
1044
/* Allocate a new server */
1045
mc.server = avahi_server_new(avahi_simple_poll_get
1046
(mc.simple_poll), &config, NULL,
1047
NULL, &error);
1048
1049
/* Free the Avahi configuration data */
1050
avahi_server_config_free(&config);
1051
}
1052
1053
/* Check if creating the Avahi server object succeeded */
1054
if (mc.server == NULL) {
1055
fprintf(stderr, "Failed to create Avahi server: %s\n",
1056
avahi_strerror(error));
1057
exitcode = EXIT_FAILURE;
1058
goto end;
1059
}
1060
1061
/* Create the Avahi service browser */
1062
sb = avahi_s_service_browser_new(mc.server, if_index,
1063
AVAHI_PROTO_INET6,
1064
"_mandos._tcp", NULL, 0,
1065
browse_callback, &mc);
1066
if (sb == NULL) {
1067
fprintf(stderr, "Failed to create service browser: %s\n",
1068
avahi_strerror(avahi_server_errno(mc.server)));
1069
exitcode = EXIT_FAILURE;
1070
goto end;
1071
}
1072
1073
/* Run the main loop */
1074
1075
if (debug){
1076
fprintf(stderr, "Starting Avahi loop search\n");
1077
}
1078
1079
avahi_simple_poll_loop(mc.simple_poll);
1080
1156
1081
end:
1157
1158
if(debug){
1159
fprintf(stderr, "%s exiting\n", argv[0]);
1160
}
1161
1162
/* Cleanup things */
1163
if(sb != NULL)
1164
avahi_s_service_browser_free(sb);
1165
1166
if(mc.server != NULL)
1167
avahi_server_free(mc.server);
1168
1169
if(mc.simple_poll != NULL)
1170
avahi_simple_poll_free(mc.simple_poll);
1171
1172
if(gnutls_initialized){
1173
gnutls_certificate_free_credentials(mc.cred);
1174
gnutls_global_deinit();
1175
gnutls_dh_params_deinit(mc.dh_params);
1176
}
1177
1178
if(gpgme_initialized){
1179
gpgme_release(mc.ctx);
1180
}
1181
1182
/* Removes the temp directory used by GPGME */
1183
if(tempdir_created){
1184
DIR *d;
1185
struct dirent *direntry;
1186
d = opendir(tempdir);
1187
if(d == NULL){
1188
if(errno != ENOENT){
1082
1083
if (debug){
1084
fprintf(stderr, "%s exiting\n", argv[0]);
1085
}
1086
1087
/* Cleanup things */
1088
if (sb != NULL)
1089
avahi_s_service_browser_free(sb);
1090
1091
if (mc.server != NULL)
1092
avahi_server_free(mc.server);
1093
1094
if (mc.simple_poll != NULL)
1095
avahi_simple_poll_free(mc.simple_poll);
1096
1097
if (gnutls_initalized){
1098
gnutls_certificate_free_credentials(mc.cred);
1099
gnutls_global_deinit ();
1100
gnutls_dh_params_deinit(mc.dh_params);
1101
}
1102
1103
if(gpgme_initalized){
1104
gpgme_release(mc.ctx);
1105
}
1106
1107
/* Removes the temp directory used by GPGME */
1108
if(tempdir[0] != '\0'){
1109
DIR *d;
1110
struct dirent *direntry;
1111
d = opendir(tempdir);
1112
if(d == NULL){
1189
1113
perror("opendir");
1190
}
1191
} else {
1192
while(true){
1193
direntry = readdir(d);
1194
if(direntry == NULL){
1195
break;
1196
}
1197
/* Skip "." and ".." */
1198
if(direntry->d_name[0] == '.'
1199
and (direntry->d_name[1] == '\0'
1200
or (direntry->d_name[1] == '.'
1201
and direntry->d_name[2] == '\0'))){
1202
continue;
1203
}
1204
char *fullname = NULL;
1205
ret = asprintf(&fullname, "%s/%s", tempdir,
1206
direntry->d_name);
1207
if(ret < 0){
1208
perror("asprintf");
1209
continue;
1210
}
1211
ret = remove(fullname);
1212
if(ret == -1){
1213
fprintf(stderr, "remove(\"%s\"): %s\n", fullname,
1214
strerror(errno));
1215
}
1216
free(fullname);
1217
}
1218
closedir(d);
1219
}
1220
ret = rmdir(tempdir);
1221
if(ret == -1 and errno != ENOENT){
1222
perror("rmdir");
1223
}
1224
}
1225
1226
return exitcode;
1114
} else {
1115
while(true){
1116
direntry = readdir(d);
1117
if(direntry == NULL){
1118
break;
1119
}
1120
if (direntry->d_type == DT_REG){
1121
char *fullname = NULL;
1122
ret = asprintf(&fullname, "%s/%s", tempdir,
1123
direntry->d_name);
1124
if(ret < 0){
1125
perror("asprintf");
1126
continue;
1127
}
1128
ret = unlink(fullname);
1129
if(ret == -1){
1130
fprintf(stderr, "unlink(\"%s\"): %s",
1131
fullname, strerror(errno));
1132
}
1133
free(fullname);
1134
}
1135
}
1136
closedir(d);
1137
}
1138
ret = rmdir(tempdir);
1139
if(ret == -1){
1140
perror("rmdir");
1141
}
1142
}
1143
1144
return exitcode;
1227
1145
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0