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- Committer: Teddy Hogeborn
- Date: 2009-01-08 03:54:06 UTC
- Revision ID: teddy@fukt.bsnet.se-20090108035406-01uqkv9xqgxlnw7c
Change the default value of the "checker" option command to make the
checker command be run-time dependent on the "host" client attribute
instead of reading it only once on startup:
* clients.conf (checker): Changed default commented-out value to
"fping -q -- %%(host)s".
* mandos (main): Changed default value for the "checker" config option
to "fping -q -- %%(host)s".
* mandos-clients.conf.xml (OPTIONS): Document changed default value.
(EXAMPLE): Changed value of "checker".
* plugins.d/password-prompt.c: Whitespace changes only.
checker command be run-time dependent on the "host" client attribute
instead of reading it only once on startup:
* clients.conf (checker): Changed default commented-out value to
"fping -q -- %%(host)s".
* mandos (main): Changed default value for the "checker" config option
to "fping -q -- %%(host)s".
* mandos-clients.conf.xml (OPTIONS): Document changed default value.
(EXAMPLE): Changed value of "checker".
* plugins.d/password-prompt.c: Whitespace changes only.
- files removed:
- debian/watch
- files renamed:
- mandos-ctl => mandos-list
- 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
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,
44
43
srand() */
45
#include <stdbool.h> /* bool, false, true */
44
#include <stdbool.h> /* bool, true */
46
45
#include <string.h> /* memset(), strcmp(), strlen(),
47
46
strerror(), asprintf(), strcpy() */
48
#include <sys/ioctl.h> /* ioctl */
47
#include <sys/ioctl.h> /* ioctl */
49
48
#include <sys/types.h> /* socket(), inet_pton(), sockaddr,
50
49
sockaddr_in6, PF_INET6,
51
SOCK_STREAM, uid_t, gid_t, open(),
52
opendir(), DIR */
50
SOCK_STREAM, INET6_ADDRSTRLEN,
51
uid_t, gid_t, open(), opendir(), DIR */
53
52
#include <sys/stat.h> /* open() */
54
53
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
55
inet_pton(), connect() */
54
struct in6_addr, inet_pton(),
55
connect() */
56
56
#include <fcntl.h> /* open() */
57
#include <dirent.h> /* opendir(), struct dirent, readdir()
58
*/
59
#include <inttypes.h> /* PRIu16, intmax_t, SCNdMAX */
57
#include <dirent.h> /* opendir(), struct dirent, readdir() */
58
#include <inttypes.h> /* PRIu16 */
60
59
#include <assert.h> /* assert() */
61
60
#include <errno.h> /* perror(), errno */
62
#include <time.h> /* nanosleep(), time() */
61
#include <time.h> /* time() */
63
62
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
64
63
SIOCSIFFLAGS, if_indextoname(),
65
64
if_nametoindex(), IF_NAMESIZE */
66
#include <netinet/in.h> /* IN6_IS_ADDR_LINKLOCAL,
67
INET_ADDRSTRLEN, INET6_ADDRSTRLEN
68
*/
65
#include <netinet/in.h>
69
66
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
70
67
getuid(), getgid(), setuid(),
71
68
setgid() */
72
69
#include <arpa/inet.h> /* inet_pton(), htons */
73
#include <iso646.h> /* not, or, and */
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;
164
157
gpgme_data_t pgp_data;
165
158
166
fd = (int)TEMP_FAILURE_RETRY(open(filename, O_RDONLY));
159
fd = TEMP_FAILURE_RETRY(open(filename, O_RDONLY));
167
160
if(fd == -1){
168
161
perror("open");
169
162
return false;
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;
184
177
}
185
178
186
ret = (int)TEMP_FAILURE_RETRY(close(fd));
179
ret = TEMP_FAILURE_RETRY(close(fd));
187
180
if(ret == -1){
188
181
perror("close");
189
182
}
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
}
509
499
/* Called when a Mandos server is found */
510
500
static int start_mandos_communication(const char *ip, uint16_t port,
511
501
AvahiIfIndex if_index,
512
mandos_context *mc, int af){
502
mandos_context *mc){
513
503
int ret, tcp_sd;
514
ssize_t sret;
515
union {
516
struct sockaddr_in in;
517
struct sockaddr_in6 in6;
518
} to;
504
union { struct sockaddr in; struct sockaddr_in6 in6; } to;
519
505
char *buffer = NULL;
520
506
char *decrypted_buffer;
521
507
size_t buffer_length = 0;
523
509
ssize_t decrypted_buffer_size;
524
510
size_t written;
525
511
int retval = 0;
512
char interface[IF_NAMESIZE];
526
513
gnutls_session_t session;
527
int pf; /* Protocol family */
528
529
switch(af){
530
case AF_INET6:
531
pf = PF_INET6;
532
break;
533
case AF_INET:
534
pf = PF_INET;
535
break;
536
default:
537
fprintf(stderr, "Bad address family: %d\n", af);
538
return -1;
539
}
540
541
ret = init_gnutls_session(mc, &session);
542
if(ret != 0){
514
515
ret = init_gnutls_session (mc, &session);
516
if (ret != 0){
543
517
return -1;
544
518
}
545
519
546
520
if(debug){
547
fprintf(stderr, "Setting up a TCP connection to %s, port %" PRIu16
521
fprintf(stderr, "Setting up a tcp connection to %s, port %" PRIu16
548
522
"\n", ip, port);
549
523
}
550
524
551
tcp_sd = socket(pf, SOCK_STREAM, 0);
552
if(tcp_sd < 0){
525
tcp_sd = socket(PF_INET6, SOCK_STREAM, 0);
526
if(tcp_sd < 0) {
553
527
perror("socket");
554
528
return -1;
555
529
}
556
530
531
if(debug){
532
if(if_indextoname((unsigned int)if_index, interface) == NULL){
533
perror("if_indextoname");
534
return -1;
535
}
536
fprintf(stderr, "Binding to interface %s\n", interface);
537
}
538
557
539
memset(&to, 0, sizeof(to));
558
if(af == AF_INET6){
559
to.in6.sin6_family = (uint16_t)af;
560
ret = inet_pton(af, ip, &to.in6.sin6_addr);
561
} else { /* IPv4 */
562
to.in.sin_family = (sa_family_t)af;
563
ret = inet_pton(af, ip, &to.in.sin_addr);
564
}
565
if(ret < 0 ){
540
to.in6.sin6_family = AF_INET6;
541
/* It would be nice to have a way to detect if we were passed an
542
IPv4 address here. Now we assume an IPv6 address. */
543
ret = inet_pton(AF_INET6, ip, &to.in6.sin6_addr);
544
if (ret < 0 ){
566
545
perror("inet_pton");
567
546
return -1;
568
547
}
570
549
fprintf(stderr, "Bad address: %s\n", ip);
571
550
return -1;
572
551
}
573
if(af == AF_INET6){
574
to.in6.sin6_port = htons(port); /* Spurious warnings from
575
-Wconversion and
576
-Wunreachable-code */
577
578
if(IN6_IS_ADDR_LINKLOCAL /* Spurious warnings from */
579
(&to.in6.sin6_addr)){ /* -Wstrict-aliasing=2 or lower and
580
-Wunreachable-code*/
581
if(if_index == AVAHI_IF_UNSPEC){
582
fprintf(stderr, "An IPv6 link-local address is incomplete"
583
" without a network interface\n");
584
return -1;
585
}
586
/* Set the network interface number as scope */
587
to.in6.sin6_scope_id = (uint32_t)if_index;
588
}
589
} else {
590
to.in.sin_port = htons(port); /* Spurious warnings from
591
-Wconversion and
592
-Wunreachable-code */
593
}
552
to.in6.sin6_port = htons(port); /* Spurious warning */
553
554
to.in6.sin6_scope_id = (uint32_t)if_index;
594
555
595
556
if(debug){
596
if(af == AF_INET6 and if_index != AVAHI_IF_UNSPEC){
597
char interface[IF_NAMESIZE];
598
if(if_indextoname((unsigned int)if_index, interface) == NULL){
599
perror("if_indextoname");
600
} else {
601
fprintf(stderr, "Connection to: %s%%%s, port %" PRIu16 "\n",
602
ip, interface, port);
603
}
604
} else {
605
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
606
port);
607
}
608
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
609
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
610
const char *pcret;
611
if(af == AF_INET6){
612
pcret = inet_ntop(af, &(to.in6.sin6_addr), addrstr,
613
sizeof(addrstr));
614
} else {
615
pcret = inet_ntop(af, &(to.in.sin_addr), addrstr,
616
sizeof(addrstr));
617
}
618
if(pcret == NULL){
557
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
558
port);
559
char addrstr[INET6_ADDRSTRLEN] = "";
560
if(inet_ntop(to.in6.sin6_family, &(to.in6.sin6_addr), addrstr,
561
sizeof(addrstr)) == NULL){
619
562
perror("inet_ntop");
620
563
} else {
621
564
if(strcmp(addrstr, ip) != 0){
624
567
}
625
568
}
626
569
627
if(af == AF_INET6){
628
ret = connect(tcp_sd, &to.in6, sizeof(to));
629
} else {
630
ret = connect(tcp_sd, &to.in, sizeof(to)); /* IPv4 */
631
}
632
if(ret < 0){
570
ret = connect(tcp_sd, &to.in, sizeof(to));
571
if (ret < 0){
633
572
perror("connect");
634
573
return -1;
635
574
}
636
575
637
576
const char *out = mandos_protocol_version;
638
577
written = 0;
639
while(true){
578
while (true){
640
579
size_t out_size = strlen(out);
641
ret = (int)TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
580
ret = TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
642
581
out_size - written));
643
if(ret == -1){
582
if (ret == -1){
644
583
perror("write");
645
584
retval = -1;
646
585
goto mandos_end;
649
588
if(written < out_size){
650
589
continue;
651
590
} else {
652
if(out == mandos_protocol_version){
591
if (out == mandos_protocol_version){
653
592
written = 0;
654
593
out = "\r\n";
655
594
} else {
662
601
fprintf(stderr, "Establishing TLS session with %s\n", ip);
663
602
}
664
603
665
gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t) tcp_sd);
604
gnutls_transport_set_ptr (session, (gnutls_transport_ptr_t) tcp_sd);
666
605
667
606
do{
668
ret = gnutls_handshake(session);
607
ret = gnutls_handshake (session);
669
608
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
670
609
671
if(ret != GNUTLS_E_SUCCESS){
610
if (ret != GNUTLS_E_SUCCESS){
672
611
if(debug){
673
612
fprintf(stderr, "*** GnuTLS Handshake failed ***\n");
674
gnutls_perror(ret);
613
gnutls_perror (ret);
675
614
}
676
615
retval = -1;
677
616
goto mandos_end;
680
619
/* Read OpenPGP packet that contains the wanted password */
681
620
682
621
if(debug){
683
fprintf(stderr, "Retrieving OpenPGP encrypted password from %s\n",
622
fprintf(stderr, "Retrieving pgp encrypted password from %s\n",
684
623
ip);
685
624
}
686
625
687
626
while(true){
688
627
buffer_capacity = adjustbuffer(&buffer, buffer_length,
689
628
buffer_capacity);
690
if(buffer_capacity == 0){
629
if (buffer_capacity == 0){
691
630
perror("adjustbuffer");
692
631
retval = -1;
693
632
goto mandos_end;
694
633
}
695
634
696
sret = gnutls_record_recv(session, buffer+buffer_length,
697
BUFFER_SIZE);
698
if(sret == 0){
635
ret = gnutls_record_recv(session, buffer+buffer_length,
636
BUFFER_SIZE);
637
if (ret == 0){
699
638
break;
700
639
}
701
if(sret < 0){
702
switch(sret){
640
if (ret < 0){
641
switch(ret){
703
642
case GNUTLS_E_INTERRUPTED:
704
643
case GNUTLS_E_AGAIN:
705
644
break;
706
645
case GNUTLS_E_REHANDSHAKE:
707
646
do{
708
ret = gnutls_handshake(session);
647
ret = gnutls_handshake (session);
709
648
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
710
if(ret < 0){
649
if (ret < 0){
711
650
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
712
gnutls_perror(ret);
651
gnutls_perror (ret);
713
652
retval = -1;
714
653
goto mandos_end;
715
654
}
718
657
fprintf(stderr, "Unknown error while reading data from"
719
658
" encrypted session with Mandos server\n");
720
659
retval = -1;
721
gnutls_bye(session, GNUTLS_SHUT_RDWR);
660
gnutls_bye (session, GNUTLS_SHUT_RDWR);
722
661
goto mandos_end;
723
662
}
724
663
} else {
725
buffer_length += (size_t) sret;
664
buffer_length += (size_t) ret;
726
665
}
727
666
}
728
667
730
669
fprintf(stderr, "Closing TLS session\n");
731
670
}
732
671
733
gnutls_bye(session, GNUTLS_SHUT_RDWR);
672
gnutls_bye (session, GNUTLS_SHUT_RDWR);
734
673
735
if(buffer_length > 0){
674
if (buffer_length > 0){
736
675
decrypted_buffer_size = pgp_packet_decrypt(mc, buffer,
737
676
buffer_length,
738
677
&decrypted_buffer);
739
if(decrypted_buffer_size >= 0){
678
if (decrypted_buffer_size >= 0){
740
679
written = 0;
741
680
while(written < (size_t) decrypted_buffer_size){
742
ret = (int)fwrite(decrypted_buffer + written, 1,
743
(size_t)decrypted_buffer_size - written,
744
stdout);
681
ret = (int)fwrite (decrypted_buffer + written, 1,
682
(size_t)decrypted_buffer_size - written,
683
stdout);
745
684
if(ret == 0 and ferror(stdout)){
746
685
if(debug){
747
686
fprintf(stderr, "Error writing encrypted data: %s\n",
764
703
765
704
mandos_end:
766
705
free(buffer);
767
ret = (int)TEMP_FAILURE_RETRY(close(tcp_sd));
706
ret = TEMP_FAILURE_RETRY(close(tcp_sd));
768
707
if(ret == -1){
769
708
perror("close");
770
709
}
771
gnutls_deinit(session);
710
gnutls_deinit (session);
772
711
return retval;
773
712
}
774
713
775
714
static void resolve_callback(AvahiSServiceResolver *r,
776
715
AvahiIfIndex interface,
777
AvahiProtocol proto,
716
AVAHI_GCC_UNUSED AvahiProtocol protocol,
778
717
AvahiResolverEvent event,
779
718
const char *name,
780
719
const char *type,
785
724
AVAHI_GCC_UNUSED AvahiStringList *txt,
786
725
AVAHI_GCC_UNUSED AvahiLookupResultFlags
787
726
flags,
788
void* userdata){
727
void* userdata) {
789
728
mandos_context *mc = userdata;
790
729
assert(r);
791
730
792
731
/* Called whenever a service has been resolved successfully or
793
732
timed out */
794
733
795
switch(event){
734
switch (event) {
796
735
default:
797
736
case AVAHI_RESOLVER_FAILURE:
798
737
fprintf(stderr, "(Avahi Resolver) Failed to resolve service '%s'"
806
745
avahi_address_snprint(ip, sizeof(ip), address);
807
746
if(debug){
808
747
fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %"
809
PRIdMAX ") on port %" PRIu16 "\n", name, host_name,
810
ip, (intmax_t)interface, port);
748
PRIu16 ") on port %d\n", name, host_name, ip,
749
interface, port);
811
750
}
812
int ret = start_mandos_communication(ip, port, interface, mc,
813
avahi_proto_to_af(proto));
814
if(ret == 0){
751
int ret = start_mandos_communication(ip, port, interface, mc);
752
if (ret == 0){
815
753
avahi_simple_poll_quit(mc->simple_poll);
816
754
}
817
755
}
819
757
avahi_s_service_resolver_free(r);
820
758
}
821
759
822
static void browse_callback(AvahiSServiceBrowser *b,
823
AvahiIfIndex interface,
824
AvahiProtocol protocol,
825
AvahiBrowserEvent event,
826
const char *name,
827
const char *type,
828
const char *domain,
829
AVAHI_GCC_UNUSED AvahiLookupResultFlags
830
flags,
831
void* userdata){
760
static void browse_callback( AvahiSServiceBrowser *b,
761
AvahiIfIndex interface,
762
AvahiProtocol protocol,
763
AvahiBrowserEvent event,
764
const char *name,
765
const char *type,
766
const char *domain,
767
AVAHI_GCC_UNUSED AvahiLookupResultFlags
768
flags,
769
void* userdata) {
832
770
mandos_context *mc = userdata;
833
771
assert(b);
834
772
835
773
/* Called whenever a new services becomes available on the LAN or
836
774
is removed from the LAN */
837
775
838
switch(event){
776
switch (event) {
839
777
default:
840
778
case AVAHI_BROWSER_FAILURE:
841
779
850
788
the callback function is called the Avahi server will free the
851
789
resolver for us. */
852
790
853
if(!(avahi_s_service_resolver_new(mc->server, interface,
791
if (!(avahi_s_service_resolver_new(mc->server, interface,
854
792
protocol, name, type, domain,
855
793
AVAHI_PROTO_INET6, 0,
856
794
resolve_callback, mc)))
871
809
}
872
810
873
811
int main(int argc, char *argv[]){
874
AvahiSServiceBrowser *sb = NULL;
875
int error;
876
int ret;
877
intmax_t tmpmax;
878
int numchars;
879
int exitcode = EXIT_SUCCESS;
880
const char *interface = "eth0";
881
struct ifreq network;
882
int sd;
883
uid_t uid;
884
gid_t gid;
885
char *connect_to = NULL;
886
char tempdir[] = "/tmp/mandosXXXXXX";
887
bool tempdir_created = false;
888
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
889
const char *seckey = PATHDIR "/" SECKEY;
890
const char *pubkey = PATHDIR "/" PUBKEY;
891
892
mandos_context mc = { .simple_poll = NULL, .server = NULL,
893
.dh_bits = 1024, .priority = "SECURE256"
894
":!CTYPE-X.509:+CTYPE-OPENPGP" };
895
bool gnutls_initialized = false;
896
bool gpgme_initialized = false;
897
double delay = 2.5;
898
899
{
900
struct argp_option options[] = {
901
{ .name = "debug", .key = 128,
902
.doc = "Debug mode", .group = 3 },
903
{ .name = "connect", .key = 'c',
904
.arg = "ADDRESS:PORT",
905
.doc = "Connect directly to a specific Mandos server",
906
.group = 1 },
907
{ .name = "interface", .key = 'i',
908
.arg = "NAME",
909
.doc = "Network interface that will be used to search for"
910
" Mandos servers",
911
.group = 1 },
912
{ .name = "seckey", .key = 's',
913
.arg = "FILE",
914
.doc = "OpenPGP secret key file base name",
915
.group = 1 },
916
{ .name = "pubkey", .key = 'p',
917
.arg = "FILE",
918
.doc = "OpenPGP public key file base name",
919
.group = 2 },
920
{ .name = "dh-bits", .key = 129,
921
.arg = "BITS",
922
.doc = "Bit length of the prime number used in the"
923
" Diffie-Hellman key exchange",
924
.group = 2 },
925
{ .name = "priority", .key = 130,
926
.arg = "STRING",
927
.doc = "GnuTLS priority string for the TLS handshake",
928
.group = 1 },
929
{ .name = "delay", .key = 131,
930
.arg = "SECONDS",
931
.doc = "Maximum delay to wait for interface startup",
932
.group = 2 },
933
{ .name = NULL }
934
};
935
936
error_t parse_opt(int key, char *arg,
937
struct argp_state *state){
938
switch(key){
939
case 128: /* --debug */
940
debug = true;
941
break;
942
case 'c': /* --connect */
943
connect_to = arg;
944
break;
945
case 'i': /* --interface */
946
interface = arg;
947
break;
948
case 's': /* --seckey */
949
seckey = arg;
950
break;
951
case 'p': /* --pubkey */
952
pubkey = arg;
953
break;
954
case 129: /* --dh-bits */
955
ret = sscanf(arg, "%" SCNdMAX "%n", &tmpmax, &numchars);
956
if(ret < 1 or tmpmax != (typeof(mc.dh_bits))tmpmax
957
or arg[numchars] != '\0'){
958
fprintf(stderr, "Bad number of DH bits\n");
959
exit(EXIT_FAILURE);
960
}
961
mc.dh_bits = (typeof(mc.dh_bits))tmpmax;
962
break;
963
case 130: /* --priority */
964
mc.priority = arg;
965
break;
966
case 131: /* --delay */
967
ret = sscanf(arg, "%lf%n", &delay, &numchars);
968
if(ret < 1 or arg[numchars] != '\0'){
969
fprintf(stderr, "Bad delay\n");
970
exit(EXIT_FAILURE);
971
}
972
break;
973
case ARGP_KEY_ARG:
974
argp_usage(state);
975
case ARGP_KEY_END:
976
break;
977
default:
978
return ARGP_ERR_UNKNOWN;
979
}
980
return 0;
981
}
982
983
struct argp argp = { .options = options, .parser = parse_opt,
984
.args_doc = "",
985
.doc = "Mandos client -- Get and decrypt"
986
" passwords from a Mandos server" };
987
ret = argp_parse(&argp, argc, argv, 0, 0, NULL);
988
if(ret == ARGP_ERR_UNKNOWN){
989
fprintf(stderr, "Unknown error while parsing arguments\n");
990
exitcode = EXIT_FAILURE;
991
goto end;
992
}
993
}
994
995
/* If the interface is down, bring it up */
996
if(interface[0] != '\0'){
997
#ifdef __linux__
998
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
999
messages to mess up the prompt */
1000
ret = klogctl(8, NULL, 5);
1001
bool restore_loglevel = true;
1002
if(ret == -1){
1003
restore_loglevel = false;
1004
perror("klogctl");
1005
}
1006
#endif
1007
1008
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1009
if(sd < 0){
1010
perror("socket");
1011
exitcode = EXIT_FAILURE;
1012
#ifdef __linux__
1013
if(restore_loglevel){
1014
ret = klogctl(7, NULL, 0);
1015
if(ret == -1){
1016
perror("klogctl");
1017
}
1018
}
1019
#endif
1020
goto end;
1021
}
1022
strcpy(network.ifr_name, interface);
1023
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1024
if(ret == -1){
1025
perror("ioctl SIOCGIFFLAGS");
1026
#ifdef __linux__
1027
if(restore_loglevel){
1028
ret = klogctl(7, NULL, 0);
1029
if(ret == -1){
1030
perror("klogctl");
1031
}
1032
}
1033
#endif
1034
exitcode = EXIT_FAILURE;
1035
goto end;
1036
}
1037
if((network.ifr_flags & IFF_UP) == 0){
1038
network.ifr_flags |= IFF_UP;
1039
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1040
if(ret == -1){
1041
perror("ioctl SIOCSIFFLAGS");
1042
exitcode = EXIT_FAILURE;
1043
#ifdef __linux__
1044
if(restore_loglevel){
1045
ret = klogctl(7, NULL, 0);
1046
if(ret == -1){
1047
perror("klogctl");
812
AvahiSServiceBrowser *sb = NULL;
813
int error;
814
int ret;
815
int exitcode = EXIT_SUCCESS;
816
const char *interface = "eth0";
817
struct ifreq network;
818
int sd;
819
uid_t uid;
820
gid_t gid;
821
char *connect_to = NULL;
822
char tempdir[] = "/tmp/mandosXXXXXX";
823
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
824
const char *seckey = PATHDIR "/" SECKEY;
825
const char *pubkey = PATHDIR "/" PUBKEY;
826
827
mandos_context mc = { .simple_poll = NULL, .server = NULL,
828
.dh_bits = 1024, .priority = "SECURE256"
829
":!CTYPE-X.509:+CTYPE-OPENPGP" };
830
bool gnutls_initalized = false;
831
bool gpgme_initalized = false;
832
833
{
834
struct argp_option options[] = {
835
{ .name = "debug", .key = 128,
836
.doc = "Debug mode", .group = 3 },
837
{ .name = "connect", .key = 'c',
838
.arg = "ADDRESS:PORT",
839
.doc = "Connect directly to a specific Mandos server",
840
.group = 1 },
841
{ .name = "interface", .key = 'i',
842
.arg = "NAME",
843
.doc = "Interface that will be used to search for Mandos"
844
" servers",
845
.group = 1 },
846
{ .name = "seckey", .key = 's',
847
.arg = "FILE",
848
.doc = "OpenPGP secret key file base name",
849
.group = 1 },
850
{ .name = "pubkey", .key = 'p',
851
.arg = "FILE",
852
.doc = "OpenPGP public key file base name",
853
.group = 2 },
854
{ .name = "dh-bits", .key = 129,
855
.arg = "BITS",
856
.doc = "Bit length of the prime number used in the"
857
" Diffie-Hellman key exchange",
858
.group = 2 },
859
{ .name = "priority", .key = 130,
860
.arg = "STRING",
861
.doc = "GnuTLS priority string for the TLS handshake",
862
.group = 1 },
863
{ .name = NULL }
864
};
865
866
error_t parse_opt (int key, char *arg,
867
struct argp_state *state) {
868
/* Get the INPUT argument from `argp_parse', which we know is
869
a pointer to our plugin list pointer. */
870
switch (key) {
871
case 128: /* --debug */
872
debug = true;
873
break;
874
case 'c': /* --connect */
875
connect_to = arg;
876
break;
877
case 'i': /* --interface */
878
interface = arg;
879
break;
880
case 's': /* --seckey */
881
seckey = arg;
882
break;
883
case 'p': /* --pubkey */
884
pubkey = arg;
885
break;
886
case 129: /* --dh-bits */
887
errno = 0;
888
mc.dh_bits = (unsigned int) strtol(arg, NULL, 10);
889
if (errno){
890
perror("strtol");
891
exit(EXIT_FAILURE);
1048
892
}
893
break;
894
case 130: /* --priority */
895
mc.priority = arg;
896
break;
897
case ARGP_KEY_ARG:
898
argp_usage (state);
899
case ARGP_KEY_END:
900
break;
901
default:
902
return ARGP_ERR_UNKNOWN;
1049
903
}
1050
#endif
904
return 0;
905
}
906
907
struct argp argp = { .options = options, .parser = parse_opt,
908
.args_doc = "",
909
.doc = "Mandos client -- Get and decrypt"
910
" passwords from a Mandos server" };
911
ret = argp_parse (&argp, argc, argv, 0, 0, NULL);
912
if (ret == ARGP_ERR_UNKNOWN){
913
fprintf(stderr, "Unknown error while parsing arguments\n");
914
exitcode = EXIT_FAILURE;
1051
915
goto end;
1052
916
}
1053
917
}
1054
/* sleep checking until interface is running */
1055
for(int i=0; i < delay * 4; i++){
918
919
/* If the interface is down, bring it up */
920
{
921
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
922
if(sd < 0) {
923
perror("socket");
924
exitcode = EXIT_FAILURE;
925
goto end;
926
}
927
strcpy(network.ifr_name, interface);
1056
928
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1057
929
if(ret == -1){
1058
930
perror("ioctl SIOCGIFFLAGS");
1059
} else if(network.ifr_flags & IFF_RUNNING){
1060
break;
1061
}
1062
struct timespec sleeptime = { .tv_nsec = 250000000 };
1063
ret = nanosleep(&sleeptime, NULL);
1064
if(ret == -1 and errno != EINTR){
1065
perror("nanosleep");
1066
}
1067
}
1068
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1069
if(ret == -1){
1070
perror("close");
1071
}
1072
#ifdef __linux__
1073
if(restore_loglevel){
1074
/* Restores kernel loglevel to default */
1075
ret = klogctl(7, NULL, 0);
931
exitcode = EXIT_FAILURE;
932
goto end;
933
}
934
if((network.ifr_flags & IFF_UP) == 0){
935
network.ifr_flags |= IFF_UP;
936
ret = ioctl(sd, SIOCSIFFLAGS, &network);
937
if(ret == -1){
938
perror("ioctl SIOCSIFFLAGS");
939
exitcode = EXIT_FAILURE;
940
goto end;
941
}
942
}
943
ret = TEMP_FAILURE_RETRY(close(sd));
1076
944
if(ret == -1){
1077
perror("klogctl");
945
perror("close");
1078
946
}
1079
947
}
1080
#endif
1081
}
1082
1083
uid = getuid();
1084
gid = getgid();
1085
1086
errno = 0;
1087
setgid(gid);
1088
if(ret == -1){
1089
perror("setgid");
1090
}
1091
1092
ret = setuid(uid);
1093
if(ret == -1){
1094
perror("setuid");
1095
}
1096
1097
ret = init_gnutls_global(&mc, pubkey, seckey);
1098
if(ret == -1){
1099
fprintf(stderr, "init_gnutls_global failed\n");
1100
exitcode = EXIT_FAILURE;
1101
goto end;
1102
} else {
1103
gnutls_initialized = true;
1104
}
1105
1106
if(mkdtemp(tempdir) == NULL){
1107
perror("mkdtemp");
1108
goto end;
1109
}
1110
tempdir_created = true;
1111
1112
if(not init_gpgme(&mc, pubkey, seckey, tempdir)){
1113
fprintf(stderr, "init_gpgme failed\n");
1114
exitcode = EXIT_FAILURE;
1115
goto end;
1116
} else {
1117
gpgme_initialized = true;
1118
}
1119
1120
if(interface[0] != '\0'){
948
949
uid = getuid();
950
gid = getgid();
951
952
ret = setuid(uid);
953
if (ret == -1){
954
perror("setuid");
955
}
956
957
setgid(gid);
958
if (ret == -1){
959
perror("setgid");
960
}
961
962
ret = init_gnutls_global(&mc, pubkey, seckey);
963
if (ret == -1){
964
fprintf(stderr, "init_gnutls_global failed\n");
965
exitcode = EXIT_FAILURE;
966
goto end;
967
} else {
968
gnutls_initalized = true;
969
}
970
971
if(mkdtemp(tempdir) == NULL){
972
perror("mkdtemp");
973
tempdir[0] = '\0';
974
goto end;
975
}
976
977
if(not init_gpgme(&mc, pubkey, seckey, tempdir)){
978
fprintf(stderr, "gpgme_initalized failed\n");
979
exitcode = EXIT_FAILURE;
980
goto end;
981
} else {
982
gpgme_initalized = true;
983
}
984
1121
985
if_index = (AvahiIfIndex) if_nametoindex(interface);
1122
986
if(if_index == 0){
1123
987
fprintf(stderr, "No such interface: \"%s\"\n", interface);
1124
exitcode = EXIT_FAILURE;
1125
goto end;
1126
}
1127
}
1128
1129
if(connect_to != NULL){
1130
/* Connect directly, do not use Zeroconf */
1131
/* (Mainly meant for debugging) */
1132
char *address = strrchr(connect_to, ':');
1133
if(address == NULL){
1134
fprintf(stderr, "No colon in address\n");
1135
exitcode = EXIT_FAILURE;
1136
goto end;
1137
}
1138
uint16_t port;
1139
ret = sscanf(address+1, "%" SCNdMAX "%n", &tmpmax, &numchars);
1140
if(ret < 1 or tmpmax != (uint16_t)tmpmax
1141
or address[numchars+1] != '\0'){
1142
fprintf(stderr, "Bad port number\n");
1143
exitcode = EXIT_FAILURE;
1144
goto end;
1145
}
1146
port = (uint16_t)tmpmax;
1147
*address = '\0';
1148
address = connect_to;
1149
/* Colon in address indicates IPv6 */
1150
int af;
1151
if(strchr(address, ':') != NULL){
1152
af = AF_INET6;
1153
} else {
1154
af = AF_INET;
1155
}
1156
ret = start_mandos_communication(address, port, if_index, &mc,
1157
af);
1158
if(ret < 0){
1159
exitcode = EXIT_FAILURE;
1160
} else {
1161
exitcode = EXIT_SUCCESS;
1162
}
1163
goto end;
1164
}
1165
1166
if(not debug){
1167
avahi_set_log_function(empty_log);
1168
}
1169
1170
/* Initialize the pseudo-RNG for Avahi */
1171
srand((unsigned int) time(NULL));
1172
1173
/* Allocate main Avahi loop object */
1174
mc.simple_poll = avahi_simple_poll_new();
1175
if(mc.simple_poll == NULL){
1176
fprintf(stderr, "Avahi: Failed to create simple poll object.\n");
1177
exitcode = EXIT_FAILURE;
1178
goto end;
1179
}
1180
1181
{
1182
AvahiServerConfig config;
1183
/* Do not publish any local Zeroconf records */
1184
avahi_server_config_init(&config);
1185
config.publish_hinfo = 0;
1186
config.publish_addresses = 0;
1187
config.publish_workstation = 0;
1188
config.publish_domain = 0;
1189
1190
/* Allocate a new server */
1191
mc.server = avahi_server_new(avahi_simple_poll_get
1192
(mc.simple_poll), &config, NULL,
1193
NULL, &error);
1194
1195
/* Free the Avahi configuration data */
1196
avahi_server_config_free(&config);
1197
}
1198
1199
/* Check if creating the Avahi server object succeeded */
1200
if(mc.server == NULL){
1201
fprintf(stderr, "Failed to create Avahi server: %s\n",
1202
avahi_strerror(error));
1203
exitcode = EXIT_FAILURE;
1204
goto end;
1205
}
1206
1207
/* Create the Avahi service browser */
1208
sb = avahi_s_service_browser_new(mc.server, if_index,
1209
AVAHI_PROTO_INET6, "_mandos._tcp",
1210
NULL, 0, browse_callback, &mc);
1211
if(sb == NULL){
1212
fprintf(stderr, "Failed to create service browser: %s\n",
1213
avahi_strerror(avahi_server_errno(mc.server)));
1214
exitcode = EXIT_FAILURE;
1215
goto end;
1216
}
1217
1218
/* Run the main loop */
1219
1220
if(debug){
1221
fprintf(stderr, "Starting Avahi loop search\n");
1222
}
1223
1224
avahi_simple_poll_loop(mc.simple_poll);
1225
988
exit(EXIT_FAILURE);
989
}
990
991
if(connect_to != NULL){
992
/* Connect directly, do not use Zeroconf */
993
/* (Mainly meant for debugging) */
994
char *address = strrchr(connect_to, ':');
995
if(address == NULL){
996
fprintf(stderr, "No colon in address\n");
997
exitcode = EXIT_FAILURE;
998
goto end;
999
}
1000
errno = 0;
1001
uint16_t port = (uint16_t) strtol(address+1, NULL, 10);
1002
if(errno){
1003
perror("Bad port number");
1004
exitcode = EXIT_FAILURE;
1005
goto end;
1006
}
1007
*address = '\0';
1008
address = connect_to;
1009
ret = start_mandos_communication(address, port, if_index, &mc);
1010
if(ret < 0){
1011
exitcode = EXIT_FAILURE;
1012
} else {
1013
exitcode = EXIT_SUCCESS;
1014
}
1015
goto end;
1016
}
1017
1018
if (not debug){
1019
avahi_set_log_function(empty_log);
1020
}
1021
1022
/* Initialize the pseudo-RNG for Avahi */
1023
srand((unsigned int) time(NULL));
1024
1025
/* Allocate main Avahi loop object */
1026
mc.simple_poll = avahi_simple_poll_new();
1027
if (mc.simple_poll == NULL) {
1028
fprintf(stderr, "Avahi: Failed to create simple poll"
1029
" object.\n");
1030
exitcode = EXIT_FAILURE;
1031
goto end;
1032
}
1033
1034
{
1035
AvahiServerConfig config;
1036
/* Do not publish any local Zeroconf records */
1037
avahi_server_config_init(&config);
1038
config.publish_hinfo = 0;
1039
config.publish_addresses = 0;
1040
config.publish_workstation = 0;
1041
config.publish_domain = 0;
1042
1043
/* Allocate a new server */
1044
mc.server = avahi_server_new(avahi_simple_poll_get
1045
(mc.simple_poll), &config, NULL,
1046
NULL, &error);
1047
1048
/* Free the Avahi configuration data */
1049
avahi_server_config_free(&config);
1050
}
1051
1052
/* Check if creating the Avahi server object succeeded */
1053
if (mc.server == NULL) {
1054
fprintf(stderr, "Failed to create Avahi server: %s\n",
1055
avahi_strerror(error));
1056
exitcode = EXIT_FAILURE;
1057
goto end;
1058
}
1059
1060
/* Create the Avahi service browser */
1061
sb = avahi_s_service_browser_new(mc.server, if_index,
1062
AVAHI_PROTO_INET6,
1063
"_mandos._tcp", NULL, 0,
1064
browse_callback, &mc);
1065
if (sb == NULL) {
1066
fprintf(stderr, "Failed to create service browser: %s\n",
1067
avahi_strerror(avahi_server_errno(mc.server)));
1068
exitcode = EXIT_FAILURE;
1069
goto end;
1070
}
1071
1072
/* Run the main loop */
1073
1074
if (debug){
1075
fprintf(stderr, "Starting Avahi loop search\n");
1076
}
1077
1078
avahi_simple_poll_loop(mc.simple_poll);
1079
1226
1080
end:
1227
1228
if(debug){
1229
fprintf(stderr, "%s exiting\n", argv[0]);
1230
}
1231
1232
/* Cleanup things */
1233
if(sb != NULL)
1234
avahi_s_service_browser_free(sb);
1235
1236
if(mc.server != NULL)
1237
avahi_server_free(mc.server);
1238
1239
if(mc.simple_poll != NULL)
1240
avahi_simple_poll_free(mc.simple_poll);
1241
1242
if(gnutls_initialized){
1243
gnutls_certificate_free_credentials(mc.cred);
1244
gnutls_global_deinit();
1245
gnutls_dh_params_deinit(mc.dh_params);
1246
}
1247
1248
if(gpgme_initialized){
1249
gpgme_release(mc.ctx);
1250
}
1251
1252
/* Removes the temp directory used by GPGME */
1253
if(tempdir_created){
1254
DIR *d;
1255
struct dirent *direntry;
1256
d = opendir(tempdir);
1257
if(d == NULL){
1258
if(errno != ENOENT){
1081
1082
if (debug){
1083
fprintf(stderr, "%s exiting\n", argv[0]);
1084
}
1085
1086
/* Cleanup things */
1087
if (sb != NULL)
1088
avahi_s_service_browser_free(sb);
1089
1090
if (mc.server != NULL)
1091
avahi_server_free(mc.server);
1092
1093
if (mc.simple_poll != NULL)
1094
avahi_simple_poll_free(mc.simple_poll);
1095
1096
if (gnutls_initalized){
1097
gnutls_certificate_free_credentials(mc.cred);
1098
gnutls_global_deinit ();
1099
gnutls_dh_params_deinit(mc.dh_params);
1100
}
1101
1102
if(gpgme_initalized){
1103
gpgme_release(mc.ctx);
1104
}
1105
1106
/* Removes the temp directory used by GPGME */
1107
if(tempdir[0] != '\0'){
1108
DIR *d;
1109
struct dirent *direntry;
1110
d = opendir(tempdir);
1111
if(d == NULL){
1259
1112
perror("opendir");
1260
}
1261
} else {
1262
while(true){
1263
direntry = readdir(d);
1264
if(direntry == NULL){
1265
break;
1266
}
1267
/* Skip "." and ".." */
1268
if(direntry->d_name[0] == '.'
1269
and (direntry->d_name[1] == '\0'
1270
or (direntry->d_name[1] == '.'
1271
and direntry->d_name[2] == '\0'))){
1272
continue;
1273
}
1274
char *fullname = NULL;
1275
ret = asprintf(&fullname, "%s/%s", tempdir,
1276
direntry->d_name);
1277
if(ret < 0){
1278
perror("asprintf");
1279
continue;
1280
}
1281
ret = remove(fullname);
1282
if(ret == -1){
1283
fprintf(stderr, "remove(\"%s\"): %s\n", fullname,
1284
strerror(errno));
1285
}
1286
free(fullname);
1287
}
1288
closedir(d);
1289
}
1290
ret = rmdir(tempdir);
1291
if(ret == -1 and errno != ENOENT){
1292
perror("rmdir");
1293
}
1294
}
1295
1296
return exitcode;
1113
} else {
1114
while(true){
1115
direntry = readdir(d);
1116
if(direntry == NULL){
1117
break;
1118
}
1119
if (direntry->d_type == DT_REG){
1120
char *fullname = NULL;
1121
ret = asprintf(&fullname, "%s/%s", tempdir,
1122
direntry->d_name);
1123
if(ret < 0){
1124
perror("asprintf");
1125
continue;
1126
}
1127
ret = unlink(fullname);
1128
if(ret == -1){
1129
fprintf(stderr, "unlink(\"%s\"): %s",
1130
fullname, strerror(errno));
1131
}
1132
free(fullname);
1133
}
1134
}
1135
closedir(d);
1136
}
1137
ret = rmdir(tempdir);
1138
if(ret == -1){
1139
perror("rmdir");
1140
}
1141
}
1142
1143
return exitcode;
1297
1144
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0