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- Committer: Teddy Hogeborn
- Date: 2008-10-01 15:29:01 UTC
- Revision ID: teddy@fukt.bsnet.se-20081001152901-fh30whl3m4vb7m24
* debian/changelog: New Debian revision.
* debian/mandos-client.lintian-overrides: Added comments.
* debian/mandos.lintian-overrides: - '' -
* debian/mandos-client.lintian-overrides: Added comments.
* debian/mandos.lintian-overrides: - '' -
- files added:
- debian/mandos-client.config
- files removed:
- NEWS
- files modified:
- .bzrignore
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(),
40
remove() */
38
stdout, ferror() */
41
39
#include <stdint.h> /* uint16_t, uint32_t */
42
40
#include <stddef.h> /* NULL, size_t, ssize_t */
43
41
#include <stdlib.h> /* free(), EXIT_SUCCESS, EXIT_FAILURE,
44
42
srand() */
45
#include <stdbool.h> /* bool, false, true */
43
#include <stdbool.h> /* bool, true */
46
44
#include <string.h> /* memset(), strcmp(), strlen(),
47
45
strerror(), asprintf(), strcpy() */
48
#include <sys/ioctl.h> /* ioctl */
46
#include <sys/ioctl.h> /* ioctl */
49
47
#include <sys/types.h> /* socket(), inet_pton(), sockaddr,
50
48
sockaddr_in6, PF_INET6,
51
SOCK_STREAM, uid_t, gid_t, open(),
52
opendir(), DIR */
49
SOCK_STREAM, INET6_ADDRSTRLEN,
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
inet_pton(), connect() */
53
struct in6_addr, inet_pton(),
54
connect() */
56
55
#include <fcntl.h> /* open() */
57
#include <dirent.h> /* opendir(), struct dirent, readdir()
58
*/
59
#include <inttypes.h> /* PRIu16, intmax_t, SCNdMAX */
56
#include <dirent.h> /* opendir(), struct dirent, readdir() */
57
#include <inttypes.h> /* PRIu16 */
60
58
#include <assert.h> /* assert() */
61
59
#include <errno.h> /* perror(), errno */
62
#include <time.h> /* nanosleep(), time() */
60
#include <time.h> /* time() */
63
61
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
64
62
SIOCSIFFLAGS, if_indextoname(),
65
63
if_nametoindex(), IF_NAMESIZE */
66
#include <netinet/in.h> /* IN6_IS_ADDR_LINKLOCAL,
67
INET_ADDRSTRLEN, INET6_ADDRSTRLEN
68
*/
64
#include <netinet/in.h>
69
65
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
70
66
getuid(), getgid(), setuid(),
71
67
setgid() */
72
68
#include <arpa/inet.h> /* inet_pton(), htons */
73
#include <iso646.h> /* not, or, and */
69
#include <iso646.h> /* not, and */
74
70
#include <argp.h> /* struct argp_option, error_t, struct
75
71
argp_state, struct argp,
76
72
argp_parse(), ARGP_KEY_ARG,
77
73
ARGP_KEY_END, ARGP_ERR_UNKNOWN */
78
#ifdef __linux__
79
#include <sys/klog.h> /* klogctl() */
80
#endif
81
74
82
75
/* Avahi */
83
76
/* All Avahi types, constants and functions
96
89
gnutls_*
97
90
init_gnutls_session(),
98
91
GNUTLS_* */
99
#include <gnutls/openpgp.h>
100
/* gnutls_certificate_set_openpgp_key_file(),
92
#include <gnutls/openpgp.h> /* gnutls_certificate_set_openpgp_key_file(),
101
93
GNUTLS_OPENPGP_FMT_BASE64 */
102
94
103
95
/* GPGME */
136
128
*/
137
129
size_t adjustbuffer(char **buffer, size_t buffer_length,
138
130
size_t buffer_capacity){
139
if(buffer_length + BUFFER_SIZE > buffer_capacity){
131
if (buffer_length + BUFFER_SIZE > buffer_capacity){
140
132
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
141
if(buffer == NULL){
133
if (buffer == NULL){
142
134
return 0;
143
135
}
144
136
buffer_capacity += BUFFER_SIZE;
157
149
158
150
159
151
/*
160
* Helper function to insert pub and seckey to the engine keyring.
152
* Helper function to insert pub and seckey to the enigne keyring.
161
153
*/
162
154
bool import_key(const char *filename){
163
155
int fd;
164
156
gpgme_data_t pgp_data;
165
157
166
fd = (int)TEMP_FAILURE_RETRY(open(filename, O_RDONLY));
158
fd = TEMP_FAILURE_RETRY(open(filename, O_RDONLY));
167
159
if(fd == -1){
168
160
perror("open");
169
161
return false;
170
162
}
171
163
172
164
rc = gpgme_data_new_from_fd(&pgp_data, fd);
173
if(rc != GPG_ERR_NO_ERROR){
165
if (rc != GPG_ERR_NO_ERROR){
174
166
fprintf(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
175
167
gpgme_strsource(rc), gpgme_strerror(rc));
176
168
return false;
177
169
}
178
170
179
171
rc = gpgme_op_import(mc->ctx, pgp_data);
180
if(rc != GPG_ERR_NO_ERROR){
172
if (rc != GPG_ERR_NO_ERROR){
181
173
fprintf(stderr, "bad gpgme_op_import: %s: %s\n",
182
174
gpgme_strsource(rc), gpgme_strerror(rc));
183
175
return false;
184
176
}
185
177
186
ret = (int)TEMP_FAILURE_RETRY(close(fd));
178
ret = TEMP_FAILURE_RETRY(close(fd));
187
179
if(ret == -1){
188
180
perror("close");
189
181
}
191
183
return true;
192
184
}
193
185
194
if(debug){
186
if (debug){
195
187
fprintf(stderr, "Initialize gpgme\n");
196
188
}
197
189
198
190
/* Init GPGME */
199
191
gpgme_check_version(NULL);
200
192
rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
201
if(rc != GPG_ERR_NO_ERROR){
193
if (rc != GPG_ERR_NO_ERROR){
202
194
fprintf(stderr, "bad gpgme_engine_check_version: %s: %s\n",
203
195
gpgme_strsource(rc), gpgme_strerror(rc));
204
196
return false;
205
197
}
206
198
207
199
/* Set GPGME home directory for the OpenPGP engine only */
208
rc = gpgme_get_engine_info(&engine_info);
209
if(rc != GPG_ERR_NO_ERROR){
200
rc = gpgme_get_engine_info (&engine_info);
201
if (rc != GPG_ERR_NO_ERROR){
210
202
fprintf(stderr, "bad gpgme_get_engine_info: %s: %s\n",
211
203
gpgme_strsource(rc), gpgme_strerror(rc));
212
204
return false;
226
218
227
219
/* Create new GPGME "context" */
228
220
rc = gpgme_new(&(mc->ctx));
229
if(rc != GPG_ERR_NO_ERROR){
221
if (rc != GPG_ERR_NO_ERROR){
230
222
fprintf(stderr, "bad gpgme_new: %s: %s\n",
231
223
gpgme_strsource(rc), gpgme_strerror(rc));
232
224
return false;
233
225
}
234
226
235
if(not import_key(pubkey) or not import_key(seckey)){
227
if (not import_key(pubkey) or not import_key(seckey)){
236
228
return false;
237
229
}
238
230
243
235
* Decrypt OpenPGP data.
244
236
* Returns -1 on error
245
237
*/
246
static ssize_t pgp_packet_decrypt(const mandos_context *mc,
247
const char *cryptotext,
248
size_t crypto_size,
249
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){
250
242
gpgme_data_t dh_crypto, dh_plain;
251
243
gpgme_error_t rc;
252
244
ssize_t ret;
253
245
size_t plaintext_capacity = 0;
254
246
ssize_t plaintext_length = 0;
255
247
256
if(debug){
248
if (debug){
257
249
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
258
250
}
259
251
260
252
/* Create new GPGME data buffer from memory cryptotext */
261
253
rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,
262
254
0);
263
if(rc != GPG_ERR_NO_ERROR){
255
if (rc != GPG_ERR_NO_ERROR){
264
256
fprintf(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
265
257
gpgme_strsource(rc), gpgme_strerror(rc));
266
258
return -1;
268
260
269
261
/* Create new empty GPGME data buffer for the plaintext */
270
262
rc = gpgme_data_new(&dh_plain);
271
if(rc != GPG_ERR_NO_ERROR){
263
if (rc != GPG_ERR_NO_ERROR){
272
264
fprintf(stderr, "bad gpgme_data_new: %s: %s\n",
273
265
gpgme_strsource(rc), gpgme_strerror(rc));
274
266
gpgme_data_release(dh_crypto);
278
270
/* Decrypt data from the cryptotext data buffer to the plaintext
279
271
data buffer */
280
272
rc = gpgme_op_decrypt(mc->ctx, dh_crypto, dh_plain);
281
if(rc != GPG_ERR_NO_ERROR){
273
if (rc != GPG_ERR_NO_ERROR){
282
274
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
283
275
gpgme_strsource(rc), gpgme_strerror(rc));
284
276
plaintext_length = -1;
285
if(debug){
277
if (debug){
286
278
gpgme_decrypt_result_t result;
287
279
result = gpgme_op_decrypt_result(mc->ctx);
288
if(result == NULL){
280
if (result == NULL){
289
281
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
290
282
} else {
291
283
fprintf(stderr, "Unsupported algorithm: %s\n",
318
310
}
319
311
320
312
/* Seek back to the beginning of the GPGME plaintext data buffer */
321
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){
322
314
perror("gpgme_data_seek");
323
315
plaintext_length = -1;
324
316
goto decrypt_end;
329
321
plaintext_capacity = adjustbuffer(plaintext,
330
322
(size_t)plaintext_length,
331
323
plaintext_capacity);
332
if(plaintext_capacity == 0){
324
if (plaintext_capacity == 0){
333
325
perror("adjustbuffer");
334
326
plaintext_length = -1;
335
327
goto decrypt_end;
338
330
ret = gpgme_data_read(dh_plain, *plaintext + plaintext_length,
339
331
BUFFER_SIZE);
340
332
/* Print the data, if any */
341
if(ret == 0){
333
if (ret == 0){
342
334
/* EOF */
343
335
break;
344
336
}
368
360
return plaintext_length;
369
361
}
370
362
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)
363
static const char * safer_gnutls_strerror (int value) {
364
const char *ret = gnutls_strerror (value); /* Spurious warning */
365
if (ret == NULL)
375
366
ret = "(unknown)";
376
367
return ret;
377
368
}
392
383
}
393
384
394
385
ret = gnutls_global_init();
395
if(ret != GNUTLS_E_SUCCESS){
396
fprintf(stderr, "GnuTLS global_init: %s\n",
397
safer_gnutls_strerror(ret));
386
if (ret != GNUTLS_E_SUCCESS) {
387
fprintf (stderr, "GnuTLS global_init: %s\n",
388
safer_gnutls_strerror(ret));
398
389
return -1;
399
390
}
400
391
401
if(debug){
392
if (debug){
402
393
/* "Use a log level over 10 to enable all debugging options."
403
394
* - GnuTLS manual
404
395
*/
408
399
409
400
/* OpenPGP credentials */
410
401
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();
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 ();
418
407
return -1;
419
408
}
420
409
427
416
ret = gnutls_certificate_set_openpgp_key_file
428
417
(mc->cred, pubkeyfilename, seckeyfilename,
429
418
GNUTLS_OPENPGP_FMT_BASE64);
430
if(ret != GNUTLS_E_SUCCESS){
419
if (ret != GNUTLS_E_SUCCESS) {
431
420
fprintf(stderr,
432
421
"Error[%d] while reading the OpenPGP key pair ('%s',"
433
422
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
438
427
439
428
/* GnuTLS server initialization */
440
429
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));
430
if (ret != GNUTLS_E_SUCCESS) {
431
fprintf (stderr, "Error in GnuTLS DH parameter initialization:"
432
" %s\n", safer_gnutls_strerror(ret));
444
433
goto globalfail;
445
434
}
446
435
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));
436
if (ret != GNUTLS_E_SUCCESS) {
437
fprintf (stderr, "Error in GnuTLS prime generation: %s\n",
438
safer_gnutls_strerror(ret));
450
439
goto globalfail;
451
440
}
452
441
467
456
int ret;
468
457
/* GnuTLS session creation */
469
458
ret = gnutls_init(session, GNUTLS_SERVER);
470
if(ret != GNUTLS_E_SUCCESS){
459
if (ret != GNUTLS_E_SUCCESS){
471
460
fprintf(stderr, "Error in GnuTLS session initialization: %s\n",
472
461
safer_gnutls_strerror(ret));
473
462
}
475
464
{
476
465
const char *err;
477
466
ret = gnutls_priority_set_direct(*session, mc->priority, &err);
478
if(ret != GNUTLS_E_SUCCESS){
467
if (ret != GNUTLS_E_SUCCESS) {
479
468
fprintf(stderr, "Syntax error at: %s\n", err);
480
469
fprintf(stderr, "GnuTLS error: %s\n",
481
470
safer_gnutls_strerror(ret));
482
gnutls_deinit(*session);
471
gnutls_deinit (*session);
483
472
return -1;
484
473
}
485
474
}
486
475
487
476
ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,
488
477
mc->cred);
489
if(ret != GNUTLS_E_SUCCESS){
478
if (ret != GNUTLS_E_SUCCESS) {
490
479
fprintf(stderr, "Error setting GnuTLS credentials: %s\n",
491
480
safer_gnutls_strerror(ret));
492
gnutls_deinit(*session);
481
gnutls_deinit (*session);
493
482
return -1;
494
483
}
495
484
496
485
/* ignore client certificate if any. */
497
gnutls_certificate_server_set_request(*session,
498
GNUTLS_CERT_IGNORE);
486
gnutls_certificate_server_set_request (*session,
487
GNUTLS_CERT_IGNORE);
499
488
500
gnutls_dh_set_prime_bits(*session, mc->dh_bits);
489
gnutls_dh_set_prime_bits (*session, mc->dh_bits);
501
490
502
491
return 0;
503
492
}
509
498
/* Called when a Mandos server is found */
510
499
static int start_mandos_communication(const char *ip, uint16_t port,
511
500
AvahiIfIndex if_index,
512
mandos_context *mc, int af){
501
mandos_context *mc){
513
502
int ret, tcp_sd;
514
ssize_t sret;
515
union {
516
struct sockaddr_in in;
517
struct sockaddr_in6 in6;
518
} to;
503
union { struct sockaddr in; struct sockaddr_in6 in6; } to;
519
504
char *buffer = NULL;
520
505
char *decrypted_buffer;
521
506
size_t buffer_length = 0;
523
508
ssize_t decrypted_buffer_size;
524
509
size_t written;
525
510
int retval = 0;
511
char interface[IF_NAMESIZE];
526
512
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){
513
514
ret = init_gnutls_session (mc, &session);
515
if (ret != 0){
543
516
return -1;
544
517
}
545
518
546
519
if(debug){
547
fprintf(stderr, "Setting up a TCP connection to %s, port %" PRIu16
520
fprintf(stderr, "Setting up a tcp connection to %s, port %" PRIu16
548
521
"\n", ip, port);
549
522
}
550
523
551
tcp_sd = socket(pf, SOCK_STREAM, 0);
552
if(tcp_sd < 0){
524
tcp_sd = socket(PF_INET6, SOCK_STREAM, 0);
525
if(tcp_sd < 0) {
553
526
perror("socket");
554
527
return -1;
555
528
}
556
529
530
if(debug){
531
if(if_indextoname((unsigned int)if_index, interface) == NULL){
532
perror("if_indextoname");
533
return -1;
534
}
535
fprintf(stderr, "Binding to interface %s\n", interface);
536
}
537
557
538
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 ){
539
to.in6.sin6_family = AF_INET6;
540
/* It would be nice to have a way to detect if we were passed an
541
IPv4 address here. Now we assume an IPv6 address. */
542
ret = inet_pton(AF_INET6, ip, &to.in6.sin6_addr);
543
if (ret < 0 ){
566
544
perror("inet_pton");
567
545
return -1;
568
546
}
570
548
fprintf(stderr, "Bad address: %s\n", ip);
571
549
return -1;
572
550
}
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
}
551
to.in6.sin6_port = htons(port); /* Spurious warning */
552
553
to.in6.sin6_scope_id = (uint32_t)if_index;
594
554
595
555
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){
556
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
557
port);
558
char addrstr[INET6_ADDRSTRLEN] = "";
559
if(inet_ntop(to.in6.sin6_family, &(to.in6.sin6_addr), addrstr,
560
sizeof(addrstr)) == NULL){
619
561
perror("inet_ntop");
620
562
} else {
621
563
if(strcmp(addrstr, ip) != 0){
624
566
}
625
567
}
626
568
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){
569
ret = connect(tcp_sd, &to.in, sizeof(to));
570
if (ret < 0){
633
571
perror("connect");
634
572
return -1;
635
573
}
636
574
637
575
const char *out = mandos_protocol_version;
638
576
written = 0;
639
while(true){
577
while (true){
640
578
size_t out_size = strlen(out);
641
ret = (int)TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
579
ret = TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
642
580
out_size - written));
643
if(ret == -1){
581
if (ret == -1){
644
582
perror("write");
645
583
retval = -1;
646
584
goto mandos_end;
649
587
if(written < out_size){
650
588
continue;
651
589
} else {
652
if(out == mandos_protocol_version){
590
if (out == mandos_protocol_version){
653
591
written = 0;
654
592
out = "\r\n";
655
593
} else {
662
600
fprintf(stderr, "Establishing TLS session with %s\n", ip);
663
601
}
664
602
665
gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t) tcp_sd);
603
gnutls_transport_set_ptr (session, (gnutls_transport_ptr_t) tcp_sd);
666
604
667
605
do{
668
ret = gnutls_handshake(session);
606
ret = gnutls_handshake (session);
669
607
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
670
608
671
if(ret != GNUTLS_E_SUCCESS){
609
if (ret != GNUTLS_E_SUCCESS){
672
610
if(debug){
673
611
fprintf(stderr, "*** GnuTLS Handshake failed ***\n");
674
gnutls_perror(ret);
612
gnutls_perror (ret);
675
613
}
676
614
retval = -1;
677
615
goto mandos_end;
680
618
/* Read OpenPGP packet that contains the wanted password */
681
619
682
620
if(debug){
683
fprintf(stderr, "Retrieving OpenPGP encrypted password from %s\n",
621
fprintf(stderr, "Retrieving pgp encrypted password from %s\n",
684
622
ip);
685
623
}
686
624
687
625
while(true){
688
626
buffer_capacity = adjustbuffer(&buffer, buffer_length,
689
627
buffer_capacity);
690
if(buffer_capacity == 0){
628
if (buffer_capacity == 0){
691
629
perror("adjustbuffer");
692
630
retval = -1;
693
631
goto mandos_end;
694
632
}
695
633
696
sret = gnutls_record_recv(session, buffer+buffer_length,
697
BUFFER_SIZE);
698
if(sret == 0){
634
ret = gnutls_record_recv(session, buffer+buffer_length,
635
BUFFER_SIZE);
636
if (ret == 0){
699
637
break;
700
638
}
701
if(sret < 0){
702
switch(sret){
639
if (ret < 0){
640
switch(ret){
703
641
case GNUTLS_E_INTERRUPTED:
704
642
case GNUTLS_E_AGAIN:
705
643
break;
706
644
case GNUTLS_E_REHANDSHAKE:
707
645
do{
708
ret = gnutls_handshake(session);
646
ret = gnutls_handshake (session);
709
647
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
710
if(ret < 0){
648
if (ret < 0){
711
649
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
712
gnutls_perror(ret);
650
gnutls_perror (ret);
713
651
retval = -1;
714
652
goto mandos_end;
715
653
}
718
656
fprintf(stderr, "Unknown error while reading data from"
719
657
" encrypted session with Mandos server\n");
720
658
retval = -1;
721
gnutls_bye(session, GNUTLS_SHUT_RDWR);
659
gnutls_bye (session, GNUTLS_SHUT_RDWR);
722
660
goto mandos_end;
723
661
}
724
662
} else {
725
buffer_length += (size_t) sret;
663
buffer_length += (size_t) ret;
726
664
}
727
665
}
728
666
730
668
fprintf(stderr, "Closing TLS session\n");
731
669
}
732
670
733
gnutls_bye(session, GNUTLS_SHUT_RDWR);
671
gnutls_bye (session, GNUTLS_SHUT_RDWR);
734
672
735
if(buffer_length > 0){
673
if (buffer_length > 0){
736
674
decrypted_buffer_size = pgp_packet_decrypt(mc, buffer,
737
675
buffer_length,
738
676
&decrypted_buffer);
739
if(decrypted_buffer_size >= 0){
677
if (decrypted_buffer_size >= 0){
740
678
written = 0;
741
679
while(written < (size_t) decrypted_buffer_size){
742
ret = (int)fwrite(decrypted_buffer + written, 1,
743
(size_t)decrypted_buffer_size - written,
744
stdout);
680
ret = (int)fwrite (decrypted_buffer + written, 1,
681
(size_t)decrypted_buffer_size - written,
682
stdout);
745
683
if(ret == 0 and ferror(stdout)){
746
684
if(debug){
747
685
fprintf(stderr, "Error writing encrypted data: %s\n",
764
702
765
703
mandos_end:
766
704
free(buffer);
767
ret = (int)TEMP_FAILURE_RETRY(close(tcp_sd));
705
ret = TEMP_FAILURE_RETRY(close(tcp_sd));
768
706
if(ret == -1){
769
707
perror("close");
770
708
}
771
gnutls_deinit(session);
709
gnutls_deinit (session);
772
710
return retval;
773
711
}
774
712
775
713
static void resolve_callback(AvahiSServiceResolver *r,
776
714
AvahiIfIndex interface,
777
AvahiProtocol proto,
715
AVAHI_GCC_UNUSED AvahiProtocol protocol,
778
716
AvahiResolverEvent event,
779
717
const char *name,
780
718
const char *type,
785
723
AVAHI_GCC_UNUSED AvahiStringList *txt,
786
724
AVAHI_GCC_UNUSED AvahiLookupResultFlags
787
725
flags,
788
void* userdata){
726
void* userdata) {
789
727
mandos_context *mc = userdata;
790
728
assert(r);
791
729
792
730
/* Called whenever a service has been resolved successfully or
793
731
timed out */
794
732
795
switch(event){
733
switch (event) {
796
734
default:
797
735
case AVAHI_RESOLVER_FAILURE:
798
736
fprintf(stderr, "(Avahi Resolver) Failed to resolve service '%s'"
806
744
avahi_address_snprint(ip, sizeof(ip), address);
807
745
if(debug){
808
746
fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %"
809
PRIdMAX ") on port %" PRIu16 "\n", name, host_name,
810
ip, (intmax_t)interface, port);
747
PRIu16 ") on port %d\n", name, host_name, ip,
748
interface, port);
811
749
}
812
int ret = start_mandos_communication(ip, port, interface, mc,
813
avahi_proto_to_af(proto));
814
if(ret == 0){
750
int ret = start_mandos_communication(ip, port, interface, mc);
751
if (ret == 0){
815
752
avahi_simple_poll_quit(mc->simple_poll);
816
753
}
817
754
}
819
756
avahi_s_service_resolver_free(r);
820
757
}
821
758
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){
759
static void browse_callback( AvahiSServiceBrowser *b,
760
AvahiIfIndex interface,
761
AvahiProtocol protocol,
762
AvahiBrowserEvent event,
763
const char *name,
764
const char *type,
765
const char *domain,
766
AVAHI_GCC_UNUSED AvahiLookupResultFlags
767
flags,
768
void* userdata) {
832
769
mandos_context *mc = userdata;
833
770
assert(b);
834
771
835
772
/* Called whenever a new services becomes available on the LAN or
836
773
is removed from the LAN */
837
774
838
switch(event){
775
switch (event) {
839
776
default:
840
777
case AVAHI_BROWSER_FAILURE:
841
778
850
787
the callback function is called the Avahi server will free the
851
788
resolver for us. */
852
789
853
if(!(avahi_s_service_resolver_new(mc->server, interface,
790
if (!(avahi_s_service_resolver_new(mc->server, interface,
854
791
protocol, name, type, domain,
855
792
AVAHI_PROTO_INET6, 0,
856
793
resolve_callback, mc)))
871
808
}
872
809
873
810
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");
811
AvahiSServiceBrowser *sb = NULL;
812
int error;
813
int ret;
814
int exitcode = EXIT_SUCCESS;
815
const char *interface = "eth0";
816
struct ifreq network;
817
int sd;
818
uid_t uid;
819
gid_t gid;
820
char *connect_to = NULL;
821
char tempdir[] = "/tmp/mandosXXXXXX";
822
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
823
const char *seckey = PATHDIR "/" SECKEY;
824
const char *pubkey = PATHDIR "/" PUBKEY;
825
826
mandos_context mc = { .simple_poll = NULL, .server = NULL,
827
.dh_bits = 1024, .priority = "SECURE256"
828
":!CTYPE-X.509:+CTYPE-OPENPGP" };
829
bool gnutls_initalized = false;
830
bool gpgme_initalized = false;
831
832
{
833
struct argp_option options[] = {
834
{ .name = "debug", .key = 128,
835
.doc = "Debug mode", .group = 3 },
836
{ .name = "connect", .key = 'c',
837
.arg = "ADDRESS:PORT",
838
.doc = "Connect directly to a specific Mandos server",
839
.group = 1 },
840
{ .name = "interface", .key = 'i',
841
.arg = "NAME",
842
.doc = "Interface that will be used to search for Mandos"
843
" servers",
844
.group = 1 },
845
{ .name = "seckey", .key = 's',
846
.arg = "FILE",
847
.doc = "OpenPGP secret key file base name",
848
.group = 1 },
849
{ .name = "pubkey", .key = 'p',
850
.arg = "FILE",
851
.doc = "OpenPGP public key file base name",
852
.group = 2 },
853
{ .name = "dh-bits", .key = 129,
854
.arg = "BITS",
855
.doc = "Bit length of the prime number used in the"
856
" Diffie-Hellman key exchange",
857
.group = 2 },
858
{ .name = "priority", .key = 130,
859
.arg = "STRING",
860
.doc = "GnuTLS priority string for the TLS handshake",
861
.group = 1 },
862
{ .name = NULL }
863
};
864
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) {
870
case 128: /* --debug */
871
debug = true;
872
break;
873
case 'c': /* --connect */
874
connect_to = arg;
875
break;
876
case 'i': /* --interface */
877
interface = arg;
878
break;
879
case 's': /* --seckey */
880
seckey = arg;
881
break;
882
case 'p': /* --pubkey */
883
pubkey = arg;
884
break;
885
case 129: /* --dh-bits */
886
errno = 0;
887
mc.dh_bits = (unsigned int) strtol(arg, NULL, 10);
888
if (errno){
889
perror("strtol");
890
exit(EXIT_FAILURE);
1048
891
}
892
break;
893
case 130: /* --priority */
894
mc.priority = arg;
895
break;
896
case ARGP_KEY_ARG:
897
argp_usage (state);
898
case ARGP_KEY_END:
899
break;
900
default:
901
return ARGP_ERR_UNKNOWN;
1049
902
}
1050
#endif
903
return 0;
904
}
905
906
struct argp argp = { .options = options, .parser = parse_opt,
907
.args_doc = "",
908
.doc = "Mandos client -- Get and decrypt"
909
" passwords from a Mandos server" };
910
ret = argp_parse (&argp, argc, argv, 0, 0, NULL);
911
if (ret == ARGP_ERR_UNKNOWN){
912
fprintf(stderr, "Unknown error while parsing arguments\n");
913
exitcode = EXIT_FAILURE;
1051
914
goto end;
1052
915
}
1053
916
}
1054
/* sleep checking until interface is running */
1055
for(int i=0; i < delay * 4; i++){
917
918
/* If the interface is down, bring it up */
919
{
920
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
921
if(sd < 0) {
922
perror("socket");
923
exitcode = EXIT_FAILURE;
924
goto end;
925
}
926
strcpy(network.ifr_name, interface);
1056
927
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1057
928
if(ret == -1){
1058
929
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);
930
exitcode = EXIT_FAILURE;
931
goto end;
932
}
933
if((network.ifr_flags & IFF_UP) == 0){
934
network.ifr_flags |= IFF_UP;
935
ret = ioctl(sd, SIOCSIFFLAGS, &network);
936
if(ret == -1){
937
perror("ioctl SIOCSIFFLAGS");
938
exitcode = EXIT_FAILURE;
939
goto end;
940
}
941
}
942
ret = TEMP_FAILURE_RETRY(close(sd));
1076
943
if(ret == -1){
1077
perror("klogctl");
944
perror("close");
1078
945
}
1079
946
}
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'){
947
948
uid = getuid();
949
gid = getgid();
950
951
ret = setuid(uid);
952
if (ret == -1){
953
perror("setuid");
954
}
955
956
setgid(gid);
957
if (ret == -1){
958
perror("setgid");
959
}
960
961
ret = init_gnutls_global(&mc, pubkey, seckey);
962
if (ret == -1){
963
fprintf(stderr, "init_gnutls_global failed\n");
964
exitcode = EXIT_FAILURE;
965
goto end;
966
} else {
967
gnutls_initalized = true;
968
}
969
970
if(mkdtemp(tempdir) == NULL){
971
perror("mkdtemp");
972
tempdir[0] = '\0';
973
goto end;
974
}
975
976
if(not init_gpgme(&mc, pubkey, seckey, tempdir)){
977
fprintf(stderr, "gpgme_initalized failed\n");
978
exitcode = EXIT_FAILURE;
979
goto end;
980
} else {
981
gpgme_initalized = true;
982
}
983
1121
984
if_index = (AvahiIfIndex) if_nametoindex(interface);
1122
985
if(if_index == 0){
1123
986
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
987
exit(EXIT_FAILURE);
988
}
989
990
if(connect_to != NULL){
991
/* Connect directly, do not use Zeroconf */
992
/* (Mainly meant for debugging) */
993
char *address = strrchr(connect_to, ':');
994
if(address == NULL){
995
fprintf(stderr, "No colon in address\n");
996
exitcode = EXIT_FAILURE;
997
goto end;
998
}
999
errno = 0;
1000
uint16_t port = (uint16_t) strtol(address+1, NULL, 10);
1001
if(errno){
1002
perror("Bad port number");
1003
exitcode = EXIT_FAILURE;
1004
goto end;
1005
}
1006
*address = '\0';
1007
address = connect_to;
1008
ret = start_mandos_communication(address, port, if_index, &mc);
1009
if(ret < 0){
1010
exitcode = EXIT_FAILURE;
1011
} else {
1012
exitcode = EXIT_SUCCESS;
1013
}
1014
goto end;
1015
}
1016
1017
if (not debug){
1018
avahi_set_log_function(empty_log);
1019
}
1020
1021
/* Initialize the pseudo-RNG for Avahi */
1022
srand((unsigned int) time(NULL));
1023
1024
/* Allocate main Avahi loop object */
1025
mc.simple_poll = avahi_simple_poll_new();
1026
if (mc.simple_poll == NULL) {
1027
fprintf(stderr, "Avahi: Failed to create simple poll"
1028
" object.\n");
1029
exitcode = EXIT_FAILURE;
1030
goto end;
1031
}
1032
1033
{
1034
AvahiServerConfig config;
1035
/* Do not publish any local Zeroconf records */
1036
avahi_server_config_init(&config);
1037
config.publish_hinfo = 0;
1038
config.publish_addresses = 0;
1039
config.publish_workstation = 0;
1040
config.publish_domain = 0;
1041
1042
/* Allocate a new server */
1043
mc.server = avahi_server_new(avahi_simple_poll_get
1044
(mc.simple_poll), &config, NULL,
1045
NULL, &error);
1046
1047
/* Free the Avahi configuration data */
1048
avahi_server_config_free(&config);
1049
}
1050
1051
/* Check if creating the Avahi server object succeeded */
1052
if (mc.server == NULL) {
1053
fprintf(stderr, "Failed to create Avahi server: %s\n",
1054
avahi_strerror(error));
1055
exitcode = EXIT_FAILURE;
1056
goto end;
1057
}
1058
1059
/* Create the Avahi service browser */
1060
sb = avahi_s_service_browser_new(mc.server, if_index,
1061
AVAHI_PROTO_INET6,
1062
"_mandos._tcp", NULL, 0,
1063
browse_callback, &mc);
1064
if (sb == NULL) {
1065
fprintf(stderr, "Failed to create service browser: %s\n",
1066
avahi_strerror(avahi_server_errno(mc.server)));
1067
exitcode = EXIT_FAILURE;
1068
goto end;
1069
}
1070
1071
/* Run the main loop */
1072
1073
if (debug){
1074
fprintf(stderr, "Starting Avahi loop search\n");
1075
}
1076
1077
avahi_simple_poll_loop(mc.simple_poll);
1078
1226
1079
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){
1080
1081
if (debug){
1082
fprintf(stderr, "%s exiting\n", argv[0]);
1083
}
1084
1085
/* Cleanup things */
1086
if (sb != NULL)
1087
avahi_s_service_browser_free(sb);
1088
1089
if (mc.server != NULL)
1090
avahi_server_free(mc.server);
1091
1092
if (mc.simple_poll != NULL)
1093
avahi_simple_poll_free(mc.simple_poll);
1094
1095
if (gnutls_initalized){
1096
gnutls_certificate_free_credentials(mc.cred);
1097
gnutls_global_deinit ();
1098
gnutls_dh_params_deinit(mc.dh_params);
1099
}
1100
1101
if(gpgme_initalized){
1102
gpgme_release(mc.ctx);
1103
}
1104
1105
/* Removes the temp directory used by GPGME */
1106
if(tempdir[0] != '\0'){
1107
DIR *d;
1108
struct dirent *direntry;
1109
d = opendir(tempdir);
1110
if(d == NULL){
1259
1111
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;
1112
} else {
1113
while(true){
1114
direntry = readdir(d);
1115
if(direntry == NULL){
1116
break;
1117
}
1118
if (direntry->d_type == DT_REG){
1119
char *fullname = NULL;
1120
ret = asprintf(&fullname, "%s/%s", tempdir,
1121
direntry->d_name);
1122
if(ret < 0){
1123
perror("asprintf");
1124
continue;
1125
}
1126
ret = unlink(fullname);
1127
if(ret == -1){
1128
fprintf(stderr, "unlink(\"%s\"): %s",
1129
fullname, strerror(errno));
1130
}
1131
free(fullname);
1132
}
1133
}
1134
closedir(d);
1135
}
1136
ret = rmdir(tempdir);
1137
if(ret == -1){
1138
perror("rmdir");
1139
}
1140
}
1141
1142
return exitcode;
1297
1143
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0