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- Committer: Teddy Hogeborn
- Date: 2008-10-03 09:32:30 UTC
- Revision ID: teddy@fukt.bsnet.se-20081003093230-rshn19e0c19zz12i
* .bzrignore (plugins.d/askpass-fifo): Added.
* Makefile (FORTIFY): Added "-fstack-protector-all".
(mandos, mandos-keygen): Use more strict regexps when updating the
version number.
* mandos (Client.__init__): Use os.path.expandvars() and
os.path.expanduser() on the "secfile"
config value.
* plugins.d/splashy.c: Update comments and order of #include's.
(main): Check user and group when looking for running splashy
process. Do not ignore ENOENT from execl(). Use _exit()
instead of "return" when an error happens in child
processes. Bug fix: Only wait for splashy_update
completion if it was started. Bug fix: detect failing
waitpid(). Only kill splashy_update if it is running. Do
the killing of the old splashy process before the fork().
Do setsid() and setuid(geteuid()) before starting the new
splashy. Report failing execl().
* plugins.d/usplash.c: Update comments and order of #include's.
(main): Check user and group when looking for running usplash
process. Do not report execv() error if interrupted by a
signal.
* Makefile (FORTIFY): Added "-fstack-protector-all".
(mandos, mandos-keygen): Use more strict regexps when updating the
version number.
* mandos (Client.__init__): Use os.path.expandvars() and
os.path.expanduser() on the "secfile"
config value.
* plugins.d/splashy.c: Update comments and order of #include's.
(main): Check user and group when looking for running splashy
process. Do not ignore ENOENT from execl(). Use _exit()
instead of "return" when an error happens in child
processes. Bug fix: Only wait for splashy_update
completion if it was started. Bug fix: detect failing
waitpid(). Only kill splashy_update if it is running. Do
the killing of the old splashy process before the fork().
Do setsid() and setuid(geteuid()) before starting the new
splashy. Report failing execl().
* plugins.d/usplash.c: Update comments and order of #include's.
(main): Check user and group when looking for running usplash
process. Do not report execv() error if interrupted by a
signal.
- files added:
- debian/mandos-client.config
- files removed:
- NEWS
- files modified:
- INSTALL
added
removed
plugins.d/mandos-client.c
1
1
/* -*- coding: utf-8 -*- */
2
2
/*
3
* Mandos-client - get and decrypt data from a Mandos server
3
* Mandos client - get and decrypt data from a Mandos server
4
4
*
5
5
* This program is partly derived from an example program for an Avahi
6
6
* service browser, downloaded from
9
9
* "browse_callback", and parts of "main".
10
10
*
11
11
* Everything else is
12
* Copyright © 2008,2009 Teddy Hogeborn
13
* Copyright © 2008,2009 Björn Påhlsson
12
* Copyright © 2008 Teddy Hogeborn & Björn Påhlsson
14
13
*
15
14
* This program is free software: you can redistribute it and/or
16
15
* modify it under the terms of the GNU General Public License as
36
35
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), asprintf() */
37
36
38
37
#include <stdio.h> /* fprintf(), stderr, fwrite(),
39
stdout, ferror(), sscanf */
38
stdout, ferror() */
40
39
#include <stdint.h> /* uint16_t, uint32_t */
41
40
#include <stddef.h> /* NULL, size_t, ssize_t */
42
41
#include <stdlib.h> /* free(), EXIT_SUCCESS, EXIT_FAILURE,
48
47
#include <sys/types.h> /* socket(), inet_pton(), sockaddr,
49
48
sockaddr_in6, PF_INET6,
50
49
SOCK_STREAM, INET6_ADDRSTRLEN,
51
uid_t, gid_t, open(), opendir(),
52
DIR */
50
uid_t, gid_t, open(), opendir(), DIR */
53
51
#include <sys/stat.h> /* open() */
54
52
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
55
53
struct in6_addr, inet_pton(),
56
54
connect() */
57
55
#include <fcntl.h> /* open() */
58
#include <dirent.h> /* opendir(), struct dirent, readdir()
59
*/
60
#include <inttypes.h> /* PRIu16, intmax_t, SCNdMAX */
56
#include <dirent.h> /* opendir(), struct dirent, readdir() */
57
#include <inttypes.h> /* PRIu16 */
61
58
#include <assert.h> /* assert() */
62
59
#include <errno.h> /* perror(), errno */
63
#include <time.h> /* time(), nanosleep() */
60
#include <time.h> /* time() */
64
61
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
65
62
SIOCSIFFLAGS, if_indextoname(),
66
63
if_nametoindex(), IF_NAMESIZE */
69
66
getuid(), getgid(), setuid(),
70
67
setgid() */
71
68
#include <arpa/inet.h> /* inet_pton(), htons */
72
#include <iso646.h> /* not, and, or */
69
#include <iso646.h> /* not, and */
73
70
#include <argp.h> /* struct argp_option, error_t, struct
74
71
argp_state, struct argp,
75
72
argp_parse(), ARGP_KEY_ARG,
76
73
ARGP_KEY_END, ARGP_ERR_UNKNOWN */
77
#include <sys/klog.h> /* klogctl() */
78
74
79
75
/* Avahi */
80
76
/* All Avahi types, constants and functions
93
89
gnutls_*
94
90
init_gnutls_session(),
95
91
GNUTLS_* */
96
#include <gnutls/openpgp.h>
97
/* gnutls_certificate_set_openpgp_key_file(),
92
#include <gnutls/openpgp.h> /* gnutls_certificate_set_openpgp_key_file(),
98
93
GNUTLS_OPENPGP_FMT_BASE64 */
99
94
100
95
/* GPGME */
133
128
*/
134
129
size_t adjustbuffer(char **buffer, size_t buffer_length,
135
130
size_t buffer_capacity){
136
if(buffer_length + BUFFER_SIZE > buffer_capacity){
131
if (buffer_length + BUFFER_SIZE > buffer_capacity){
137
132
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
138
if(buffer == NULL){
133
if (buffer == NULL){
139
134
return 0;
140
135
}
141
136
buffer_capacity += BUFFER_SIZE;
160
155
int fd;
161
156
gpgme_data_t pgp_data;
162
157
163
fd = (int)TEMP_FAILURE_RETRY(open(filename, O_RDONLY));
158
fd = TEMP_FAILURE_RETRY(open(filename, O_RDONLY));
164
159
if(fd == -1){
165
160
perror("open");
166
161
return false;
167
162
}
168
163
169
164
rc = gpgme_data_new_from_fd(&pgp_data, fd);
170
if(rc != GPG_ERR_NO_ERROR){
165
if (rc != GPG_ERR_NO_ERROR){
171
166
fprintf(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
172
167
gpgme_strsource(rc), gpgme_strerror(rc));
173
168
return false;
174
169
}
175
170
176
171
rc = gpgme_op_import(mc->ctx, pgp_data);
177
if(rc != GPG_ERR_NO_ERROR){
172
if (rc != GPG_ERR_NO_ERROR){
178
173
fprintf(stderr, "bad gpgme_op_import: %s: %s\n",
179
174
gpgme_strsource(rc), gpgme_strerror(rc));
180
175
return false;
181
176
}
182
177
183
ret = (int)TEMP_FAILURE_RETRY(close(fd));
178
ret = TEMP_FAILURE_RETRY(close(fd));
184
179
if(ret == -1){
185
180
perror("close");
186
181
}
188
183
return true;
189
184
}
190
185
191
if(debug){
186
if (debug){
192
187
fprintf(stderr, "Initialize gpgme\n");
193
188
}
194
189
195
190
/* Init GPGME */
196
191
gpgme_check_version(NULL);
197
192
rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
198
if(rc != GPG_ERR_NO_ERROR){
193
if (rc != GPG_ERR_NO_ERROR){
199
194
fprintf(stderr, "bad gpgme_engine_check_version: %s: %s\n",
200
195
gpgme_strsource(rc), gpgme_strerror(rc));
201
196
return false;
202
197
}
203
198
204
199
/* Set GPGME home directory for the OpenPGP engine only */
205
rc = gpgme_get_engine_info(&engine_info);
206
if(rc != GPG_ERR_NO_ERROR){
200
rc = gpgme_get_engine_info (&engine_info);
201
if (rc != GPG_ERR_NO_ERROR){
207
202
fprintf(stderr, "bad gpgme_get_engine_info: %s: %s\n",
208
203
gpgme_strsource(rc), gpgme_strerror(rc));
209
204
return false;
223
218
224
219
/* Create new GPGME "context" */
225
220
rc = gpgme_new(&(mc->ctx));
226
if(rc != GPG_ERR_NO_ERROR){
221
if (rc != GPG_ERR_NO_ERROR){
227
222
fprintf(stderr, "bad gpgme_new: %s: %s\n",
228
223
gpgme_strsource(rc), gpgme_strerror(rc));
229
224
return false;
230
225
}
231
226
232
if(not import_key(pubkey) or not import_key(seckey)){
227
if (not import_key(pubkey) or not import_key(seckey)){
233
228
return false;
234
229
}
235
230
240
235
* Decrypt OpenPGP data.
241
236
* Returns -1 on error
242
237
*/
243
static ssize_t pgp_packet_decrypt(const mandos_context *mc,
244
const char *cryptotext,
245
size_t crypto_size,
246
char **plaintext){
238
static ssize_t pgp_packet_decrypt (const mandos_context *mc,
239
const char *cryptotext,
240
size_t crypto_size,
241
char **plaintext){
247
242
gpgme_data_t dh_crypto, dh_plain;
248
243
gpgme_error_t rc;
249
244
ssize_t ret;
250
245
size_t plaintext_capacity = 0;
251
246
ssize_t plaintext_length = 0;
252
247
253
if(debug){
248
if (debug){
254
249
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
255
250
}
256
251
257
252
/* Create new GPGME data buffer from memory cryptotext */
258
253
rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,
259
254
0);
260
if(rc != GPG_ERR_NO_ERROR){
255
if (rc != GPG_ERR_NO_ERROR){
261
256
fprintf(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
262
257
gpgme_strsource(rc), gpgme_strerror(rc));
263
258
return -1;
265
260
266
261
/* Create new empty GPGME data buffer for the plaintext */
267
262
rc = gpgme_data_new(&dh_plain);
268
if(rc != GPG_ERR_NO_ERROR){
263
if (rc != GPG_ERR_NO_ERROR){
269
264
fprintf(stderr, "bad gpgme_data_new: %s: %s\n",
270
265
gpgme_strsource(rc), gpgme_strerror(rc));
271
266
gpgme_data_release(dh_crypto);
275
270
/* Decrypt data from the cryptotext data buffer to the plaintext
276
271
data buffer */
277
272
rc = gpgme_op_decrypt(mc->ctx, dh_crypto, dh_plain);
278
if(rc != GPG_ERR_NO_ERROR){
273
if (rc != GPG_ERR_NO_ERROR){
279
274
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
280
275
gpgme_strsource(rc), gpgme_strerror(rc));
281
276
plaintext_length = -1;
282
if(debug){
277
if (debug){
283
278
gpgme_decrypt_result_t result;
284
279
result = gpgme_op_decrypt_result(mc->ctx);
285
if(result == NULL){
280
if (result == NULL){
286
281
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
287
282
} else {
288
283
fprintf(stderr, "Unsupported algorithm: %s\n",
315
310
}
316
311
317
312
/* Seek back to the beginning of the GPGME plaintext data buffer */
318
if(gpgme_data_seek(dh_plain, (off_t)0, SEEK_SET) == -1){
313
if (gpgme_data_seek(dh_plain, (off_t) 0, SEEK_SET) == -1){
319
314
perror("gpgme_data_seek");
320
315
plaintext_length = -1;
321
316
goto decrypt_end;
326
321
plaintext_capacity = adjustbuffer(plaintext,
327
322
(size_t)plaintext_length,
328
323
plaintext_capacity);
329
if(plaintext_capacity == 0){
324
if (plaintext_capacity == 0){
330
325
perror("adjustbuffer");
331
326
plaintext_length = -1;
332
327
goto decrypt_end;
335
330
ret = gpgme_data_read(dh_plain, *plaintext + plaintext_length,
336
331
BUFFER_SIZE);
337
332
/* Print the data, if any */
338
if(ret == 0){
333
if (ret == 0){
339
334
/* EOF */
340
335
break;
341
336
}
365
360
return plaintext_length;
366
361
}
367
362
368
static const char * safer_gnutls_strerror(int value) {
369
const char *ret = gnutls_strerror(value); /* Spurious warning from
370
-Wunreachable-code */
371
if(ret == NULL)
363
static const char * safer_gnutls_strerror (int value) {
364
const char *ret = gnutls_strerror (value); /* Spurious warning */
365
if (ret == NULL)
372
366
ret = "(unknown)";
373
367
return ret;
374
368
}
389
383
}
390
384
391
385
ret = gnutls_global_init();
392
if(ret != GNUTLS_E_SUCCESS) {
393
fprintf(stderr, "GnuTLS global_init: %s\n",
394
safer_gnutls_strerror(ret));
386
if (ret != GNUTLS_E_SUCCESS) {
387
fprintf (stderr, "GnuTLS global_init: %s\n",
388
safer_gnutls_strerror(ret));
395
389
return -1;
396
390
}
397
391
398
if(debug){
392
if (debug){
399
393
/* "Use a log level over 10 to enable all debugging options."
400
394
* - GnuTLS manual
401
395
*/
405
399
406
400
/* OpenPGP credentials */
407
401
gnutls_certificate_allocate_credentials(&mc->cred);
408
if(ret != GNUTLS_E_SUCCESS){
409
fprintf(stderr, "GnuTLS memory error: %s\n", /* Spurious warning
410
* from
411
* -Wunreachable-code
412
*/
413
safer_gnutls_strerror(ret));
414
gnutls_global_deinit();
402
if (ret != GNUTLS_E_SUCCESS){
403
fprintf (stderr, "GnuTLS memory error: %s\n", /* Spurious
404
warning */
405
safer_gnutls_strerror(ret));
406
gnutls_global_deinit ();
415
407
return -1;
416
408
}
417
409
424
416
ret = gnutls_certificate_set_openpgp_key_file
425
417
(mc->cred, pubkeyfilename, seckeyfilename,
426
418
GNUTLS_OPENPGP_FMT_BASE64);
427
if(ret != GNUTLS_E_SUCCESS) {
419
if (ret != GNUTLS_E_SUCCESS) {
428
420
fprintf(stderr,
429
421
"Error[%d] while reading the OpenPGP key pair ('%s',"
430
422
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
435
427
436
428
/* GnuTLS server initialization */
437
429
ret = gnutls_dh_params_init(&mc->dh_params);
438
if(ret != GNUTLS_E_SUCCESS) {
439
fprintf(stderr, "Error in GnuTLS DH parameter initialization:"
440
" %s\n", safer_gnutls_strerror(ret));
430
if (ret != GNUTLS_E_SUCCESS) {
431
fprintf (stderr, "Error in GnuTLS DH parameter initialization:"
432
" %s\n", safer_gnutls_strerror(ret));
441
433
goto globalfail;
442
434
}
443
435
ret = gnutls_dh_params_generate2(mc->dh_params, mc->dh_bits);
444
if(ret != GNUTLS_E_SUCCESS) {
445
fprintf(stderr, "Error in GnuTLS prime generation: %s\n",
446
safer_gnutls_strerror(ret));
436
if (ret != GNUTLS_E_SUCCESS) {
437
fprintf (stderr, "Error in GnuTLS prime generation: %s\n",
438
safer_gnutls_strerror(ret));
447
439
goto globalfail;
448
440
}
449
441
464
456
int ret;
465
457
/* GnuTLS session creation */
466
458
ret = gnutls_init(session, GNUTLS_SERVER);
467
if(ret != GNUTLS_E_SUCCESS){
459
if (ret != GNUTLS_E_SUCCESS){
468
460
fprintf(stderr, "Error in GnuTLS session initialization: %s\n",
469
461
safer_gnutls_strerror(ret));
470
462
}
472
464
{
473
465
const char *err;
474
466
ret = gnutls_priority_set_direct(*session, mc->priority, &err);
475
if(ret != GNUTLS_E_SUCCESS) {
467
if (ret != GNUTLS_E_SUCCESS) {
476
468
fprintf(stderr, "Syntax error at: %s\n", err);
477
469
fprintf(stderr, "GnuTLS error: %s\n",
478
470
safer_gnutls_strerror(ret));
479
gnutls_deinit(*session);
471
gnutls_deinit (*session);
480
472
return -1;
481
473
}
482
474
}
483
475
484
476
ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,
485
477
mc->cred);
486
if(ret != GNUTLS_E_SUCCESS) {
478
if (ret != GNUTLS_E_SUCCESS) {
487
479
fprintf(stderr, "Error setting GnuTLS credentials: %s\n",
488
480
safer_gnutls_strerror(ret));
489
gnutls_deinit(*session);
481
gnutls_deinit (*session);
490
482
return -1;
491
483
}
492
484
493
485
/* ignore client certificate if any. */
494
gnutls_certificate_server_set_request(*session,
495
GNUTLS_CERT_IGNORE);
486
gnutls_certificate_server_set_request (*session,
487
GNUTLS_CERT_IGNORE);
496
488
497
gnutls_dh_set_prime_bits(*session, mc->dh_bits);
489
gnutls_dh_set_prime_bits (*session, mc->dh_bits);
498
490
499
491
return 0;
500
492
}
508
500
AvahiIfIndex if_index,
509
501
mandos_context *mc){
510
502
int ret, tcp_sd;
511
ssize_t sret;
512
503
union { struct sockaddr in; struct sockaddr_in6 in6; } to;
513
504
char *buffer = NULL;
514
505
char *decrypted_buffer;
520
511
char interface[IF_NAMESIZE];
521
512
gnutls_session_t session;
522
513
523
ret = init_gnutls_session(mc, &session);
524
if(ret != 0){
514
ret = init_gnutls_session (mc, &session);
515
if (ret != 0){
525
516
return -1;
526
517
}
527
518
549
540
/* It would be nice to have a way to detect if we were passed an
550
541
IPv4 address here. Now we assume an IPv6 address. */
551
542
ret = inet_pton(AF_INET6, ip, &to.in6.sin6_addr);
552
if(ret < 0 ){
543
if (ret < 0 ){
553
544
perror("inet_pton");
554
545
return -1;
555
546
}
557
548
fprintf(stderr, "Bad address: %s\n", ip);
558
549
return -1;
559
550
}
560
to.in6.sin6_port = htons(port); /* Spurious warnings from
561
-Wconversion and
562
-Wunreachable-code */
551
to.in6.sin6_port = htons(port); /* Spurious warning */
563
552
564
553
to.in6.sin6_scope_id = (uint32_t)if_index;
565
554
578
567
}
579
568
580
569
ret = connect(tcp_sd, &to.in, sizeof(to));
581
if(ret < 0){
570
if (ret < 0){
582
571
perror("connect");
583
572
return -1;
584
573
}
585
574
586
575
const char *out = mandos_protocol_version;
587
576
written = 0;
588
while(true){
577
while (true){
589
578
size_t out_size = strlen(out);
590
ret = (int)TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
579
ret = TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
591
580
out_size - written));
592
if(ret == -1){
581
if (ret == -1){
593
582
perror("write");
594
583
retval = -1;
595
584
goto mandos_end;
598
587
if(written < out_size){
599
588
continue;
600
589
} else {
601
if(out == mandos_protocol_version){
590
if (out == mandos_protocol_version){
602
591
written = 0;
603
592
out = "\r\n";
604
593
} else {
611
600
fprintf(stderr, "Establishing TLS session with %s\n", ip);
612
601
}
613
602
614
gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t) tcp_sd);
603
gnutls_transport_set_ptr (session, (gnutls_transport_ptr_t) tcp_sd);
615
604
616
605
do{
617
ret = gnutls_handshake(session);
606
ret = gnutls_handshake (session);
618
607
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
619
608
620
if(ret != GNUTLS_E_SUCCESS){
609
if (ret != GNUTLS_E_SUCCESS){
621
610
if(debug){
622
611
fprintf(stderr, "*** GnuTLS Handshake failed ***\n");
623
gnutls_perror(ret);
612
gnutls_perror (ret);
624
613
}
625
614
retval = -1;
626
615
goto mandos_end;
636
625
while(true){
637
626
buffer_capacity = adjustbuffer(&buffer, buffer_length,
638
627
buffer_capacity);
639
if(buffer_capacity == 0){
628
if (buffer_capacity == 0){
640
629
perror("adjustbuffer");
641
630
retval = -1;
642
631
goto mandos_end;
643
632
}
644
633
645
sret = gnutls_record_recv(session, buffer+buffer_length,
646
BUFFER_SIZE);
647
if(sret == 0){
634
ret = gnutls_record_recv(session, buffer+buffer_length,
635
BUFFER_SIZE);
636
if (ret == 0){
648
637
break;
649
638
}
650
if(sret < 0){
651
switch(sret){
639
if (ret < 0){
640
switch(ret){
652
641
case GNUTLS_E_INTERRUPTED:
653
642
case GNUTLS_E_AGAIN:
654
643
break;
655
644
case GNUTLS_E_REHANDSHAKE:
656
645
do{
657
ret = gnutls_handshake(session);
646
ret = gnutls_handshake (session);
658
647
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
659
if(ret < 0){
648
if (ret < 0){
660
649
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
661
gnutls_perror(ret);
650
gnutls_perror (ret);
662
651
retval = -1;
663
652
goto mandos_end;
664
653
}
667
656
fprintf(stderr, "Unknown error while reading data from"
668
657
" encrypted session with Mandos server\n");
669
658
retval = -1;
670
gnutls_bye(session, GNUTLS_SHUT_RDWR);
659
gnutls_bye (session, GNUTLS_SHUT_RDWR);
671
660
goto mandos_end;
672
661
}
673
662
} else {
674
buffer_length += (size_t) sret;
663
buffer_length += (size_t) ret;
675
664
}
676
665
}
677
666
679
668
fprintf(stderr, "Closing TLS session\n");
680
669
}
681
670
682
gnutls_bye(session, GNUTLS_SHUT_RDWR);
671
gnutls_bye (session, GNUTLS_SHUT_RDWR);
683
672
684
if(buffer_length > 0){
673
if (buffer_length > 0){
685
674
decrypted_buffer_size = pgp_packet_decrypt(mc, buffer,
686
675
buffer_length,
687
676
&decrypted_buffer);
688
if(decrypted_buffer_size >= 0){
677
if (decrypted_buffer_size >= 0){
689
678
written = 0;
690
679
while(written < (size_t) decrypted_buffer_size){
691
ret = (int)fwrite(decrypted_buffer + written, 1,
692
(size_t)decrypted_buffer_size - written,
693
stdout);
680
ret = (int)fwrite (decrypted_buffer + written, 1,
681
(size_t)decrypted_buffer_size - written,
682
stdout);
694
683
if(ret == 0 and ferror(stdout)){
695
684
if(debug){
696
685
fprintf(stderr, "Error writing encrypted data: %s\n",
713
702
714
703
mandos_end:
715
704
free(buffer);
716
ret = (int)TEMP_FAILURE_RETRY(close(tcp_sd));
705
ret = TEMP_FAILURE_RETRY(close(tcp_sd));
717
706
if(ret == -1){
718
707
perror("close");
719
708
}
720
gnutls_deinit(session);
709
gnutls_deinit (session);
721
710
return retval;
722
711
}
723
712
741
730
/* Called whenever a service has been resolved successfully or
742
731
timed out */
743
732
744
switch(event) {
733
switch (event) {
745
734
default:
746
735
case AVAHI_RESOLVER_FAILURE:
747
736
fprintf(stderr, "(Avahi Resolver) Failed to resolve service '%s'"
755
744
avahi_address_snprint(ip, sizeof(ip), address);
756
745
if(debug){
757
746
fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %"
758
PRIdMAX ") on port %" PRIu16 "\n", name, host_name,
759
ip, (intmax_t)interface, port);
747
PRIu16 ") on port %d\n", name, host_name, ip,
748
interface, port);
760
749
}
761
750
int ret = start_mandos_communication(ip, port, interface, mc);
762
if(ret == 0){
751
if (ret == 0){
763
752
avahi_simple_poll_quit(mc->simple_poll);
764
753
}
765
754
}
783
772
/* Called whenever a new services becomes available on the LAN or
784
773
is removed from the LAN */
785
774
786
switch(event) {
775
switch (event) {
787
776
default:
788
777
case AVAHI_BROWSER_FAILURE:
789
778
798
787
the callback function is called the Avahi server will free the
799
788
resolver for us. */
800
789
801
if(!(avahi_s_service_resolver_new(mc->server, interface,
790
if (!(avahi_s_service_resolver_new(mc->server, interface,
802
791
protocol, name, type, domain,
803
792
AVAHI_PROTO_INET6, 0,
804
793
resolve_callback, mc)))
822
811
AvahiSServiceBrowser *sb = NULL;
823
812
int error;
824
813
int ret;
825
intmax_t tmpmax;
826
int numchars;
827
814
int exitcode = EXIT_SUCCESS;
828
815
const char *interface = "eth0";
829
816
struct ifreq network;
841
828
":!CTYPE-X.509:+CTYPE-OPENPGP" };
842
829
bool gnutls_initalized = false;
843
830
bool gpgme_initalized = false;
844
double delay = 2.5;
845
831
846
832
{
847
833
struct argp_option options[] = {
873
859
.arg = "STRING",
874
860
.doc = "GnuTLS priority string for the TLS handshake",
875
861
.group = 1 },
876
{ .name = "delay", .key = 131,
877
.arg = "SECONDS",
878
.doc = "Maximum delay to wait for interface startup",
879
.group = 2 },
880
862
{ .name = NULL }
881
863
};
882
864
883
error_t parse_opt(int key, char *arg,
884
struct argp_state *state) {
885
switch(key) {
865
error_t parse_opt (int key, char *arg,
866
struct argp_state *state) {
867
/* Get the INPUT argument from `argp_parse', which we know is
868
a pointer to our plugin list pointer. */
869
switch (key) {
886
870
case 128: /* --debug */
887
871
debug = true;
888
872
break;
899
883
pubkey = arg;
900
884
break;
901
885
case 129: /* --dh-bits */
902
ret = sscanf(arg, "%" SCNdMAX "%n", &tmpmax, &numchars);
903
if(ret < 1 or tmpmax != (typeof(mc.dh_bits))tmpmax
904
or arg[numchars] != '\0'){
905
fprintf(stderr, "Bad number of DH bits\n");
886
errno = 0;
887
mc.dh_bits = (unsigned int) strtol(arg, NULL, 10);
888
if (errno){
889
perror("strtol");
906
890
exit(EXIT_FAILURE);
907
891
}
908
mc.dh_bits = (typeof(mc.dh_bits))tmpmax;
909
892
break;
910
893
case 130: /* --priority */
911
894
mc.priority = arg;
912
895
break;
913
case 131: /* --delay */
914
ret = sscanf(arg, "%lf%n", &delay, &numchars);
915
if(ret < 1 or arg[numchars] != '\0'){
916
fprintf(stderr, "Bad delay\n");
917
exit(EXIT_FAILURE);
918
}
919
break;
920
896
case ARGP_KEY_ARG:
921
argp_usage(state);
897
argp_usage (state);
922
898
case ARGP_KEY_END:
923
899
break;
924
900
default:
931
907
.args_doc = "",
932
908
.doc = "Mandos client -- Get and decrypt"
933
909
" passwords from a Mandos server" };
934
ret = argp_parse(&argp, argc, argv, 0, 0, NULL);
935
if(ret == ARGP_ERR_UNKNOWN){
910
ret = argp_parse (&argp, argc, argv, 0, 0, NULL);
911
if (ret == ARGP_ERR_UNKNOWN){
936
912
fprintf(stderr, "Unknown error while parsing arguments\n");
937
913
exitcode = EXIT_FAILURE;
938
914
goto end;
941
917
942
918
/* If the interface is down, bring it up */
943
919
{
944
// Lower kernel loglevel to KERN_NOTICE to avoid
945
// KERN_INFO messages to mess up the prompt
946
ret = klogctl(8, NULL, 5);
947
if(ret == -1){
948
perror("klogctl");
949
}
950
951
920
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
952
921
if(sd < 0) {
953
922
perror("socket");
954
923
exitcode = EXIT_FAILURE;
955
ret = klogctl(7, NULL, 0);
956
if(ret == -1){
957
perror("klogctl");
958
}
959
924
goto end;
960
925
}
961
926
strcpy(network.ifr_name, interface);
962
927
ret = ioctl(sd, SIOCGIFFLAGS, &network);
963
928
if(ret == -1){
964
929
perror("ioctl SIOCGIFFLAGS");
965
ret = klogctl(7, NULL, 0);
966
if(ret == -1){
967
perror("klogctl");
968
}
969
930
exitcode = EXIT_FAILURE;
970
931
goto end;
971
932
}
975
936
if(ret == -1){
976
937
perror("ioctl SIOCSIFFLAGS");
977
938
exitcode = EXIT_FAILURE;
978
ret = klogctl(7, NULL, 0);
979
if(ret == -1){
980
perror("klogctl");
981
}
982
939
goto end;
983
940
}
984
941
}
985
// sleep checking until interface is running
986
for(int i=0; i < delay * 4; i++){
987
ret = ioctl(sd, SIOCGIFFLAGS, &network);
988
if(ret == -1){
989
perror("ioctl SIOCGIFFLAGS");
990
} else if(network.ifr_flags & IFF_RUNNING){
991
break;
992
}
993
struct timespec sleeptime = { .tv_nsec = 250000000 };
994
nanosleep(&sleeptime, NULL);
995
}
996
ret = (int)TEMP_FAILURE_RETRY(close(sd));
942
ret = TEMP_FAILURE_RETRY(close(sd));
997
943
if(ret == -1){
998
944
perror("close");
999
945
}
1000
// Restores kernel loglevel to default
1001
ret = klogctl(7, NULL, 0);
1002
if(ret == -1){
1003
perror("klogctl");
1004
}
1005
946
}
1006
947
1007
948
uid = getuid();
1008
949
gid = getgid();
1009
950
1010
951
ret = setuid(uid);
1011
if(ret == -1){
952
if (ret == -1){
1012
953
perror("setuid");
1013
954
}
1014
955
1015
956
setgid(gid);
1016
if(ret == -1){
957
if (ret == -1){
1017
958
perror("setgid");
1018
959
}
1019
960
1020
961
ret = init_gnutls_global(&mc, pubkey, seckey);
1021
if(ret == -1){
962
if (ret == -1){
1022
963
fprintf(stderr, "init_gnutls_global failed\n");
1023
964
exitcode = EXIT_FAILURE;
1024
965
goto end;
1055
996
exitcode = EXIT_FAILURE;
1056
997
goto end;
1057
998
}
1058
uint16_t port;
1059
ret = sscanf(address+1, "%" SCNdMAX "%n", &tmpmax, &numchars);
1060
if(ret < 1 or tmpmax != (uint16_t)tmpmax
1061
or address[numchars+1] != '\0'){
1062
fprintf(stderr, "Bad port number\n");
999
errno = 0;
1000
uint16_t port = (uint16_t) strtol(address+1, NULL, 10);
1001
if(errno){
1002
perror("Bad port number");
1063
1003
exitcode = EXIT_FAILURE;
1064
1004
goto end;
1065
1005
}
1066
port = (uint16_t)tmpmax;
1067
1006
*address = '\0';
1068
1007
address = connect_to;
1069
1008
ret = start_mandos_communication(address, port, if_index, &mc);
1075
1014
goto end;
1076
1015
}
1077
1016
1078
if(not debug){
1017
if (not debug){
1079
1018
avahi_set_log_function(empty_log);
1080
1019
}
1081
1020
1084
1023
1085
1024
/* Allocate main Avahi loop object */
1086
1025
mc.simple_poll = avahi_simple_poll_new();
1087
if(mc.simple_poll == NULL) {
1026
if (mc.simple_poll == NULL) {
1088
1027
fprintf(stderr, "Avahi: Failed to create simple poll"
1089
1028
" object.\n");
1090
1029
exitcode = EXIT_FAILURE;
1110
1049
}
1111
1050
1112
1051
/* Check if creating the Avahi server object succeeded */
1113
if(mc.server == NULL) {
1052
if (mc.server == NULL) {
1114
1053
fprintf(stderr, "Failed to create Avahi server: %s\n",
1115
1054
avahi_strerror(error));
1116
1055
exitcode = EXIT_FAILURE;
1122
1061
AVAHI_PROTO_INET6,
1123
1062
"_mandos._tcp", NULL, 0,
1124
1063
browse_callback, &mc);
1125
if(sb == NULL) {
1064
if (sb == NULL) {
1126
1065
fprintf(stderr, "Failed to create service browser: %s\n",
1127
1066
avahi_strerror(avahi_server_errno(mc.server)));
1128
1067
exitcode = EXIT_FAILURE;
1131
1070
1132
1071
/* Run the main loop */
1133
1072
1134
if(debug){
1073
if (debug){
1135
1074
fprintf(stderr, "Starting Avahi loop search\n");
1136
1075
}
1137
1076
1138
1077
avahi_simple_poll_loop(mc.simple_poll);
1139
1078
1140
1079
end:
1141
1080
1142
if(debug){
1081
if (debug){
1143
1082
fprintf(stderr, "%s exiting\n", argv[0]);
1144
1083
}
1145
1084
1146
1085
/* Cleanup things */
1147
if(sb != NULL)
1086
if (sb != NULL)
1148
1087
avahi_s_service_browser_free(sb);
1149
1088
1150
if(mc.server != NULL)
1089
if (mc.server != NULL)
1151
1090
avahi_server_free(mc.server);
1152
1091
1153
if(mc.simple_poll != NULL)
1092
if (mc.simple_poll != NULL)
1154
1093
avahi_simple_poll_free(mc.simple_poll);
1155
1094
1156
if(gnutls_initalized){
1095
if (gnutls_initalized){
1157
1096
gnutls_certificate_free_credentials(mc.cred);
1158
gnutls_global_deinit();
1097
gnutls_global_deinit ();
1159
1098
gnutls_dh_params_deinit(mc.dh_params);
1160
1099
}
1161
1100
1169
1108
struct dirent *direntry;
1170
1109
d = opendir(tempdir);
1171
1110
if(d == NULL){
1172
if(errno != ENOENT){
1173
perror("opendir");
1174
}
1111
perror("opendir");
1175
1112
} else {
1176
1113
while(true){
1177
1114
direntry = readdir(d);
1178
1115
if(direntry == NULL){
1179
1116
break;
1180
1117
}
1181
if(direntry->d_type == DT_REG){
1118
if (direntry->d_type == DT_REG){
1182
1119
char *fullname = NULL;
1183
1120
ret = asprintf(&fullname, "%s/%s", tempdir,
1184
1121
direntry->d_name);
1197
1134
closedir(d);
1198
1135
}
1199
1136
ret = rmdir(tempdir);
1200
if(ret == -1 and errno != ENOENT){
1137
if(ret == -1){
1201
1138
perror("rmdir");
1202
1139
}
1203
1140
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0