To get this branch, use:
bzr branch
http://bzr.recompile.se/loggerhead/mandos/release
« back to all changes in this revision
Viewing changes to plugins.d/password-request.c
- browse files at revision 67
- compare with another revision
- download diff
- download tarball
- view history from revision 67
- Committer: Teddy Hogeborn
- Date: 2008-08-12 06:46:11 UTC
- Revision ID: teddy@fukt.bsnet.se-20080812064611-7wfjg391ypmff085
* mandos-keygen: New program to generate new client keys on
installation.
* Makefile (all): No longer build documentation.
(doc): New; build documentation.
(maintainer-clean): Remove build-local client keydir.
(run-client): Make build-local keydir with keys.
(run-server): Do not depend on "all".
(install, install-server, install-client, uninstall,
uninstall-server, uninstall-client, purge, purge-server,
purge-client): New.
installation.
* Makefile (all): No longer build documentation.
(doc): New; build documentation.
(maintainer-clean): Remove build-local client keydir.
(run-client): Make build-local keydir with keys.
(run-server): Do not depend on "all".
(install, install-server, install-client, uninstall,
uninstall-server, uninstall-client, purge, purge-server,
purge-client): New.
- files added:
- mandos-client.xml
- files removed:
- ca.pem
- files renamed:
- mandos-clients.conf => clients.conf
- server.py => mandos
- plugbasedclient.c => mandos-client.c
- plugins.d/passprompt.c => plugins.d/password-prompt.c
- plugins.d/mandosclient.c => plugins.d/password-request.c
- files modified:
- Makefile
added
removed
plugins.d/password-request.c
1
/***
2
This file is part of avahi.
3
4
avahi is free software; you can redistribute it and/or modify it
5
under the terms of the GNU Lesser General Public License as
6
published by the Free Software Foundation; either version 2.1 of the
7
License, or (at your option) any later version.
8
9
avahi is distributed in the hope that it will be useful, but WITHOUT
10
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
11
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General
12
Public License for more details.
13
14
You should have received a copy of the GNU Lesser General Public
15
License along with avahi; if not, write to the Free Software
16
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
17
USA.
18
***/
1
/* -*- coding: utf-8 -*- */
2
/*
3
* Mandos client - get and decrypt data from a Mandos server
4
*
5
* This program is partly derived from an example program for an Avahi
6
* service browser, downloaded from
7
* <http://avahi.org/browser/examples/core-browse-services.c>. This
8
* includes the following functions: "resolve_callback",
9
* "browse_callback", and parts of "main".
10
*
11
* Everything else is
12
* Copyright © 2007-2008 Teddy Hogeborn & Björn Påhlsson
13
*
14
* This program is free software: you can redistribute it and/or
15
* modify it under the terms of the GNU General Public License as
16
* published by the Free Software Foundation, either version 3 of the
17
* License, or (at your option) any later version.
18
*
19
* This program is distributed in the hope that it will be useful, but
20
* WITHOUT ANY WARRANTY; without even the implied warranty of
21
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
22
* General Public License for more details.
23
*
24
* You should have received a copy of the GNU General Public License
25
* along with this program. If not, see
26
* <http://www.gnu.org/licenses/>.
27
*
28
* Contact the authors at <mandos@fukt.bsnet.se>.
29
*/
19
30
31
/* Needed by GPGME, specifically gpgme_data_seek() */
20
32
#define _LARGEFILE_SOURCE
21
33
#define _FILE_OFFSET_BITS 64
22
34
23
#include <stdio.h>
24
#include <assert.h>
25
#include <stdlib.h>
26
#include <time.h>
27
#include <net/if.h> /* if_nametoindex */
28
35
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY() */
36
37
#include <stdio.h> /* fprintf(), stderr, fwrite(), stdout,
38
ferror() */
39
#include <stdint.h> /* uint16_t, uint32_t */
40
#include <stddef.h> /* NULL, size_t, ssize_t */
41
#include <stdlib.h> /* free(), EXIT_SUCCESS, EXIT_FAILURE,
42
srand() */
43
#include <stdbool.h> /* bool, true */
44
#include <string.h> /* memset(), strcmp(), strlen(),
45
strerror(), memcpy(), strcpy() */
46
#include <sys/ioctl.h> /* ioctl */
47
#include <sys/types.h> /* socket(), inet_pton(), sockaddr,
48
sockaddr_in6, PF_INET6,
49
SOCK_STREAM, INET6_ADDRSTRLEN,
50
uid_t, gid_t */
51
#include <inttypes.h> /* PRIu16 */
52
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
53
struct in6_addr, inet_pton(),
54
connect() */
55
#include <assert.h> /* assert() */
56
#include <errno.h> /* perror(), errno */
57
#include <time.h> /* time() */
58
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
59
SIOCSIFFLAGS, if_indextoname(),
60
if_nametoindex(), IF_NAMESIZE */
61
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
62
getuid(), getgid(), setuid(),
63
setgid() */
64
#include <netinet/in.h>
65
#include <arpa/inet.h> /* inet_pton(), htons */
66
#include <iso646.h> /* not, and */
67
#include <argp.h> /* struct argp_option, error_t, struct
68
argp_state, struct argp,
69
argp_parse(), ARGP_KEY_ARG,
70
ARGP_KEY_END, ARGP_ERR_UNKNOWN */
71
72
/* Avahi */
73
/* All Avahi types, constants and functions
74
Avahi*, avahi_*,
75
AVAHI_* */
29
76
#include <avahi-core/core.h>
30
77
#include <avahi-core/lookup.h>
31
78
#include <avahi-core/log.h>
33
80
#include <avahi-common/malloc.h>
34
81
#include <avahi-common/error.h>
35
82
36
//mandos client part
37
#include <sys/types.h> /* socket(), setsockopt(), inet_pton() */
38
#include <sys/socket.h> /* socket(), setsockopt(), struct sockaddr_in6, struct in6_addr, inet_pton() */
39
#include <gnutls/gnutls.h> /* ALL GNUTLS STUFF */
40
#include <gnutls/openpgp.h> /* gnutls with openpgp stuff */
41
42
#include <unistd.h> /* close() */
43
#include <netinet/in.h>
44
#include <stdbool.h> /* true */
45
#include <string.h> /* memset */
46
#include <arpa/inet.h> /* inet_pton() */
47
#include <iso646.h> /* not */
48
49
// gpgme
50
#include <errno.h> /* perror() */
51
#include <gpgme.h>
52
53
// getopt long
54
#include <getopt.h>
55
56
#ifndef CERT_ROOT
57
#define CERT_ROOT "/conf/conf.d/cryptkeyreq/"
58
#endif
59
#define CERTFILE CERT_ROOT "openpgp-client.txt"
60
#define KEYFILE CERT_ROOT "openpgp-client-key.txt"
83
/* GnuTLS */
84
#include <gnutls/gnutls.h> /* All GnuTLS types, constants and functions
85
gnutls_*
86
init_gnutls_session(),
87
GNUTLS_* */
88
#include <gnutls/openpgp.h> /* gnutls_certificate_set_openpgp_key_file(),
89
GNUTLS_OPENPGP_FMT_BASE64 */
90
91
/* GPGME */
92
#include <gpgme.h> /* All GPGME types, constants and functions
93
gpgme_*
94
GPGME_PROTOCOL_OpenPGP,
95
GPG_ERR_NO_* */
96
61
97
#define BUFFER_SIZE 256
62
#define DH_BITS 1024
63
98
64
99
bool debug = false;
65
char *interface = "eth0";
100
static const char *keydir = "/conf/conf.d/mandos";
101
static const char mandos_protocol_version[] = "1";
102
const char *argp_program_version = "password-request 1.0";
103
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
66
104
105
/* Used for passing in values through the Avahi callback functions */
67
106
typedef struct {
68
gnutls_session_t session;
107
AvahiSimplePoll *simple_poll;
108
AvahiServer *server;
69
109
gnutls_certificate_credentials_t cred;
110
unsigned int dh_bits;
70
111
gnutls_dh_params_t dh_params;
71
} encrypted_session;
72
73
74
ssize_t gpg_packet_decrypt (char *packet, size_t packet_size, char **new_packet, char *homedir){
112
const char *priority;
113
} mandos_context;
114
115
/*
116
* Make room in "buffer" for at least BUFFER_SIZE additional bytes.
117
* "buffer_capacity" is how much is currently allocated,
118
* "buffer_length" is how much is already used.
119
*/
120
size_t adjustbuffer(char **buffer, size_t buffer_length,
121
size_t buffer_capacity){
122
if (buffer_length + BUFFER_SIZE > buffer_capacity){
123
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
124
if (buffer == NULL){
125
return 0;
126
}
127
buffer_capacity += BUFFER_SIZE;
128
}
129
return buffer_capacity;
130
}
131
132
/*
133
* Decrypt OpenPGP data using keyrings in HOMEDIR.
134
* Returns -1 on error
135
*/
136
static ssize_t pgp_packet_decrypt (const char *cryptotext,
137
size_t crypto_size,
138
char **plaintext,
139
const char *homedir){
75
140
gpgme_data_t dh_crypto, dh_plain;
76
141
gpgme_ctx_t ctx;
77
142
gpgme_error_t rc;
78
143
ssize_t ret;
79
size_t new_packet_capacity = 0;
80
size_t new_packet_length = 0;
144
size_t plaintext_capacity = 0;
145
ssize_t plaintext_length = 0;
81
146
gpgme_engine_info_t engine_info;
82
147
83
148
if (debug){
84
fprintf(stderr, "Attempting to decrypt password from gpg packet\n");
149
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
85
150
}
86
151
87
152
/* Init GPGME */
88
153
gpgme_check_version(NULL);
89
gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
154
rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
155
if (rc != GPG_ERR_NO_ERROR){
156
fprintf(stderr, "bad gpgme_engine_check_version: %s: %s\n",
157
gpgme_strsource(rc), gpgme_strerror(rc));
158
return -1;
159
}
90
160
91
/* Set GPGME home directory */
161
/* Set GPGME home directory for the OpenPGP engine only */
92
162
rc = gpgme_get_engine_info (&engine_info);
93
163
if (rc != GPG_ERR_NO_ERROR){
94
164
fprintf(stderr, "bad gpgme_get_engine_info: %s: %s\n",
104
174
engine_info = engine_info->next;
105
175
}
106
176
if(engine_info == NULL){
107
fprintf(stderr, "Could not set home dir to %s\n", homedir);
177
fprintf(stderr, "Could not set GPGME home dir to %s\n", homedir);
108
178
return -1;
109
179
}
110
180
111
/* Create new GPGME data buffer from packet buffer */
112
rc = gpgme_data_new_from_mem(&dh_crypto, packet, packet_size, 0);
181
/* Create new GPGME data buffer from memory cryptotext */
182
rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,
183
0);
113
184
if (rc != GPG_ERR_NO_ERROR){
114
185
fprintf(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
115
186
gpgme_strsource(rc), gpgme_strerror(rc));
121
192
if (rc != GPG_ERR_NO_ERROR){
122
193
fprintf(stderr, "bad gpgme_data_new: %s: %s\n",
123
194
gpgme_strsource(rc), gpgme_strerror(rc));
195
gpgme_data_release(dh_crypto);
124
196
return -1;
125
197
}
126
198
129
201
if (rc != GPG_ERR_NO_ERROR){
130
202
fprintf(stderr, "bad gpgme_new: %s: %s\n",
131
203
gpgme_strsource(rc), gpgme_strerror(rc));
132
return -1;
204
plaintext_length = -1;
205
goto decrypt_end;
133
206
}
134
207
135
/* Decrypt data from the FILE pointer to the plaintext data buffer */
208
/* Decrypt data from the cryptotext data buffer to the plaintext
209
data buffer */
136
210
rc = gpgme_op_decrypt(ctx, dh_crypto, dh_plain);
137
211
if (rc != GPG_ERR_NO_ERROR){
138
212
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
139
213
gpgme_strsource(rc), gpgme_strerror(rc));
140
return -1;
214
plaintext_length = -1;
215
goto decrypt_end;
141
216
}
142
217
143
218
if(debug){
144
fprintf(stderr, "decryption of gpg packet succeeded\n");
219
fprintf(stderr, "Decryption of OpenPGP data succeeded\n");
145
220
}
146
221
147
222
if (debug){
148
223
gpgme_decrypt_result_t result;
149
224
result = gpgme_op_decrypt_result(ctx);
150
225
if (result == NULL){
151
226
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
152
227
} else {
153
fprintf(stderr, "Unsupported algorithm: %s\n", result->unsupported_algorithm);
154
fprintf(stderr, "Wrong key usage: %d\n", result->wrong_key_usage);
228
fprintf(stderr, "Unsupported algorithm: %s\n",
229
result->unsupported_algorithm);
230
fprintf(stderr, "Wrong key usage: %u\n",
231
result->wrong_key_usage);
155
232
if(result->file_name != NULL){
156
233
fprintf(stderr, "File name: %s\n", result->file_name);
157
234
}
163
240
gpgme_pubkey_algo_name(recipient->pubkey_algo));
164
241
fprintf(stderr, "Key ID: %s\n", recipient->keyid);
165
242
fprintf(stderr, "Secret key available: %s\n",
166
recipient->status == GPG_ERR_NO_SECKEY ? "No" : "Yes");
243
recipient->status == GPG_ERR_NO_SECKEY
244
? "No" : "Yes");
167
245
recipient = recipient->next;
168
246
}
169
247
}
170
248
}
171
249
}
172
250
173
/* Delete the GPGME FILE pointer cryptotext data buffer */
174
gpgme_data_release(dh_crypto);
175
176
251
/* Seek back to the beginning of the GPGME plaintext data buffer */
177
gpgme_data_seek(dh_plain, 0, SEEK_SET);
178
179
*new_packet = 0;
252
if (gpgme_data_seek(dh_plain, (off_t) 0, SEEK_SET) == -1){
253
perror("pgpme_data_seek");
254
plaintext_length = -1;
255
goto decrypt_end;
256
}
257
258
*plaintext = NULL;
180
259
while(true){
181
if (new_packet_length + BUFFER_SIZE > new_packet_capacity){
182
*new_packet = realloc(*new_packet, new_packet_capacity + BUFFER_SIZE);
183
if (*new_packet == NULL){
184
perror("realloc");
185
return -1;
186
}
187
new_packet_capacity += BUFFER_SIZE;
260
plaintext_capacity = adjustbuffer(plaintext,
261
(size_t)plaintext_length,
262
plaintext_capacity);
263
if (plaintext_capacity == 0){
264
perror("adjustbuffer");
265
plaintext_length = -1;
266
goto decrypt_end;
188
267
}
189
268
190
ret = gpgme_data_read(dh_plain, *new_packet + new_packet_length, BUFFER_SIZE);
269
ret = gpgme_data_read(dh_plain, *plaintext + plaintext_length,
270
BUFFER_SIZE);
191
271
/* Print the data, if any */
192
272
if (ret == 0){
193
/* If password is empty, then a incorrect error will be printed */
273
/* EOF */
194
274
break;
195
275
}
196
276
if(ret < 0){
197
277
perror("gpgme_data_read");
198
return -1;
278
plaintext_length = -1;
279
goto decrypt_end;
199
280
}
200
new_packet_length += ret;
281
plaintext_length += ret;
201
282
}
202
283
203
/* FIXME: check characters before printing to screen so to not print
204
terminal control characters */
205
/* if(debug){ */
206
/* fprintf(stderr, "decrypted password is: "); */
207
/* fwrite(*new_packet, 1, new_packet_length, stderr); */
208
/* fprintf(stderr, "\n"); */
209
/* } */
284
if(debug){
285
fprintf(stderr, "Decrypted password is: ");
286
for(ssize_t i = 0; i < plaintext_length; i++){
287
fprintf(stderr, "%02hhX ", (*plaintext)[i]);
288
}
289
fprintf(stderr, "\n");
290
}
291
292
decrypt_end:
293
294
/* Delete the GPGME cryptotext data buffer */
295
gpgme_data_release(dh_crypto);
210
296
211
297
/* Delete the GPGME plaintext data buffer */
212
298
gpgme_data_release(dh_plain);
213
return new_packet_length;
299
return plaintext_length;
214
300
}
215
301
216
302
static const char * safer_gnutls_strerror (int value) {
220
306
return ret;
221
307
}
222
308
223
void debuggnutls(int level, const char* string){
224
fprintf(stderr, "%s", string);
309
/* GnuTLS log function callback */
310
static void debuggnutls(__attribute__((unused)) int level,
311
const char* string){
312
fprintf(stderr, "GnuTLS: %s", string);
225
313
}
226
314
227
int initgnutls(encrypted_session *es){
228
const char *err;
315
static int init_gnutls_global(mandos_context *mc,
316
const char *pubkeyfile,
317
const char *seckeyfile){
229
318
int ret;
230
319
231
320
if(debug){
232
fprintf(stderr, "Initializing gnutls\n");
321
fprintf(stderr, "Initializing GnuTLS\n");
233
322
}
234
235
323
236
if ((ret = gnutls_global_init ())
237
!= GNUTLS_E_SUCCESS) {
238
fprintf (stderr, "global_init: %s\n", safer_gnutls_strerror(ret));
324
ret = gnutls_global_init();
325
if (ret != GNUTLS_E_SUCCESS) {
326
fprintf (stderr, "GnuTLS global_init: %s\n",
327
safer_gnutls_strerror(ret));
239
328
return -1;
240
329
}
241
330
242
331
if (debug){
332
/* "Use a log level over 10 to enable all debugging options."
333
* - GnuTLS manual
334
*/
243
335
gnutls_global_set_log_level(11);
244
336
gnutls_global_set_log_function(debuggnutls);
245
337
}
246
338
247
248
/* openpgp credentials */
249
if ((ret = gnutls_certificate_allocate_credentials (&es->cred))
250
!= GNUTLS_E_SUCCESS) {
251
fprintf (stderr, "memory error: %s\n", safer_gnutls_strerror(ret));
339
/* OpenPGP credentials */
340
gnutls_certificate_allocate_credentials(&mc->cred);
341
if (ret != GNUTLS_E_SUCCESS){
342
fprintf (stderr, "GnuTLS memory error: %s\n",
343
safer_gnutls_strerror(ret));
344
gnutls_global_deinit ();
252
345
return -1;
253
346
}
254
347
255
348
if(debug){
256
fprintf(stderr, "Attempting to use openpgp certificate %s"
257
" and keyfile %s as gnutls credentials\n", CERTFILE, KEYFILE);
349
fprintf(stderr, "Attempting to use OpenPGP certificate %s"
350
" and keyfile %s as GnuTLS credentials\n", pubkeyfile,
351
seckeyfile);
258
352
}
259
353
260
354
ret = gnutls_certificate_set_openpgp_key_file
261
(es->cred, CERTFILE, KEYFILE, GNUTLS_OPENPGP_FMT_BASE64);
262
if (ret != GNUTLS_E_SUCCESS) {
263
fprintf
264
(stderr, "Error[%d] while reading the OpenPGP key pair ('%s', '%s')\n",
265
ret, CERTFILE, KEYFILE);
266
fprintf(stdout, "The Error is: %s\n",
267
safer_gnutls_strerror(ret));
268
return -1;
269
}
270
271
//Gnutls server initialization
272
if ((ret = gnutls_dh_params_init (&es->dh_params))
273
!= GNUTLS_E_SUCCESS) {
274
fprintf (stderr, "Error in dh parameter initialization: %s\n",
275
safer_gnutls_strerror(ret));
276
return -1;
277
}
278
279
if ((ret = gnutls_dh_params_generate2 (es->dh_params, DH_BITS))
280
!= GNUTLS_E_SUCCESS) {
281
fprintf (stderr, "Error in prime generation: %s\n",
282
safer_gnutls_strerror(ret));
283
return -1;
284
}
285
286
gnutls_certificate_set_dh_params (es->cred, es->dh_params);
287
288
// Gnutls session creation
289
if ((ret = gnutls_init (&es->session, GNUTLS_SERVER))
290
!= GNUTLS_E_SUCCESS){
291
fprintf(stderr, "Error in gnutls session initialization: %s\n",
292
safer_gnutls_strerror(ret));
293
}
294
295
if ((ret = gnutls_priority_set_direct (es->session, "NORMAL", &err))
296
!= GNUTLS_E_SUCCESS) {
297
fprintf(stderr, "Syntax error at: %s\n", err);
298
fprintf(stderr, "Gnutls error: %s\n",
299
safer_gnutls_strerror(ret));
300
return -1;
301
}
302
303
if ((ret = gnutls_credentials_set
304
(es->session, GNUTLS_CRD_CERTIFICATE, es->cred))
305
!= GNUTLS_E_SUCCESS) {
306
fprintf(stderr, "Error setting a credentials set: %s\n",
307
safer_gnutls_strerror(ret));
308
return -1;
309
}
310
355
(mc->cred, pubkeyfile, seckeyfile, GNUTLS_OPENPGP_FMT_BASE64);
356
if (ret != GNUTLS_E_SUCCESS) {
357
fprintf(stderr,
358
"Error[%d] while reading the OpenPGP key pair ('%s',"
359
" '%s')\n", ret, pubkeyfile, seckeyfile);
360
fprintf(stdout, "The GnuTLS error is: %s\n",
361
safer_gnutls_strerror(ret));
362
goto globalfail;
363
}
364
365
/* GnuTLS server initialization */
366
ret = gnutls_dh_params_init(&mc->dh_params);
367
if (ret != GNUTLS_E_SUCCESS) {
368
fprintf (stderr, "Error in GnuTLS DH parameter initialization:"
369
" %s\n", safer_gnutls_strerror(ret));
370
goto globalfail;
371
}
372
ret = gnutls_dh_params_generate2(mc->dh_params, mc->dh_bits);
373
if (ret != GNUTLS_E_SUCCESS) {
374
fprintf (stderr, "Error in GnuTLS prime generation: %s\n",
375
safer_gnutls_strerror(ret));
376
goto globalfail;
377
}
378
379
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
380
381
return 0;
382
383
globalfail:
384
385
gnutls_certificate_free_credentials(mc->cred);
386
gnutls_global_deinit();
387
return -1;
388
389
}
390
391
static int init_gnutls_session(mandos_context *mc,
392
gnutls_session_t *session){
393
int ret;
394
/* GnuTLS session creation */
395
ret = gnutls_init(session, GNUTLS_SERVER);
396
if (ret != GNUTLS_E_SUCCESS){
397
fprintf(stderr, "Error in GnuTLS session initialization: %s\n",
398
safer_gnutls_strerror(ret));
399
}
400
401
{
402
const char *err;
403
ret = gnutls_priority_set_direct(*session, mc->priority, &err);
404
if (ret != GNUTLS_E_SUCCESS) {
405
fprintf(stderr, "Syntax error at: %s\n", err);
406
fprintf(stderr, "GnuTLS error: %s\n",
407
safer_gnutls_strerror(ret));
408
gnutls_deinit (*session);
409
return -1;
410
}
411
}
412
413
ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,
414
mc->cred);
415
if (ret != GNUTLS_E_SUCCESS) {
416
fprintf(stderr, "Error setting GnuTLS credentials: %s\n",
417
safer_gnutls_strerror(ret));
418
gnutls_deinit (*session);
419
return -1;
420
}
421
311
422
/* ignore client certificate if any. */
312
gnutls_certificate_server_set_request (es->session, GNUTLS_CERT_IGNORE);
423
gnutls_certificate_server_set_request (*session,
424
GNUTLS_CERT_IGNORE);
313
425
314
gnutls_dh_set_prime_bits (es->session, DH_BITS);
426
gnutls_dh_set_prime_bits (*session, mc->dh_bits);
315
427
316
428
return 0;
317
429
}
318
430
319
void empty_log(AvahiLogLevel level, const char *txt){}
431
/* Avahi log function callback */
432
static void empty_log(__attribute__((unused)) AvahiLogLevel level,
433
__attribute__((unused)) const char *txt){}
320
434
321
int start_mandos_communcation(char *ip, uint16_t port){
435
/* Called when a Mandos server is found */
436
static int start_mandos_communication(const char *ip, uint16_t port,
437
AvahiIfIndex if_index,
438
mandos_context *mc){
322
439
int ret, tcp_sd;
323
struct sockaddr_in6 to;
324
struct in6_addr ip_addr;
325
encrypted_session es;
440
union { struct sockaddr in; struct sockaddr_in6 in6; } to;
326
441
char *buffer = NULL;
327
442
char *decrypted_buffer;
328
443
size_t buffer_length = 0;
329
444
size_t buffer_capacity = 0;
330
445
ssize_t decrypted_buffer_size;
446
size_t written;
331
447
int retval = 0;
332
448
char interface[IF_NAMESIZE];
449
gnutls_session_t session;
450
451
ret = init_gnutls_session (mc, &session);
452
if (ret != 0){
453
return -1;
454
}
455
333
456
if(debug){
334
fprintf(stderr, "Setting up a tcp connection to %s\n", ip);
457
fprintf(stderr, "Setting up a tcp connection to %s, port %" PRIu16
458
"\n", ip, port);
335
459
}
336
460
337
461
tcp_sd = socket(PF_INET6, SOCK_STREAM, 0);
341
465
}
342
466
343
467
if(debug){
468
if(if_indextoname((unsigned int)if_index, interface) == NULL){
469
perror("if_indextoname");
470
return -1;
471
}
344
472
fprintf(stderr, "Binding to interface %s\n", interface);
345
473
}
346
347
ret = setsockopt(tcp_sd, SOL_SOCKET, SO_BINDTODEVICE, interface, 5);
348
if(tcp_sd < 0) {
349
perror("setsockopt bindtodevice");
350
return -1;
351
}
352
474
353
memset(&to,0,sizeof(to));
354
to.sin6_family = AF_INET6;
355
ret = inet_pton(AF_INET6, ip, &ip_addr);
475
memset(&to,0,sizeof(to)); /* Spurious warning */
476
to.in6.sin6_family = AF_INET6;
477
/* It would be nice to have a way to detect if we were passed an
478
IPv4 address here. Now we assume an IPv6 address. */
479
ret = inet_pton(AF_INET6, ip, &to.in6.sin6_addr);
356
480
if (ret < 0 ){
357
481
perror("inet_pton");
358
482
return -1;
359
}
483
}
360
484
if(ret == 0){
361
485
fprintf(stderr, "Bad address: %s\n", ip);
362
486
return -1;
363
487
}
364
to.sin6_port = htons(port);
365
to.sin6_scope_id = if_nametoindex(interface);
366
488
to.in6.sin6_port = htons(port); /* Spurious warning */
489
490
to.in6.sin6_scope_id = (uint32_t)if_index;
491
367
492
if(debug){
368
fprintf(stderr, "Connection to: %s\n", ip);
493
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
494
port);
495
char addrstr[INET6_ADDRSTRLEN] = "";
496
if(inet_ntop(to.in6.sin6_family, &(to.in6.sin6_addr), addrstr,
497
sizeof(addrstr)) == NULL){
498
perror("inet_ntop");
499
} else {
500
if(strcmp(addrstr, ip) != 0){
501
fprintf(stderr, "Canonical address form: %s\n", addrstr);
502
}
503
}
369
504
}
370
505
371
ret = connect(tcp_sd, (struct sockaddr *) &to, sizeof(to));
506
ret = connect(tcp_sd, &to.in, sizeof(to));
372
507
if (ret < 0){
373
508
perror("connect");
374
509
return -1;
375
510
}
376
377
ret = initgnutls (&es);
378
if (ret != 0){
379
retval = -1;
380
return -1;
381
}
382
383
384
gnutls_transport_set_ptr (es.session, (gnutls_transport_ptr_t) tcp_sd);
385
511
512
const char *out = mandos_protocol_version;
513
written = 0;
514
while (true){
515
size_t out_size = strlen(out);
516
ret = TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
517
out_size - written));
518
if (ret == -1){
519
perror("write");
520
retval = -1;
521
goto mandos_end;
522
}
523
written += (size_t)ret;
524
if(written < out_size){
525
continue;
526
} else {
527
if (out == mandos_protocol_version){
528
written = 0;
529
out = "\r\n";
530
} else {
531
break;
532
}
533
}
534
}
535
386
536
if(debug){
387
fprintf(stderr, "Establishing tls session with %s\n", ip);
537
fprintf(stderr, "Establishing TLS session with %s\n", ip);
388
538
}
539
540
gnutls_transport_set_ptr (session, (gnutls_transport_ptr_t) tcp_sd);
389
541
390
391
ret = gnutls_handshake (es.session);
542
do{
543
ret = gnutls_handshake (session);
544
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
392
545
393
546
if (ret != GNUTLS_E_SUCCESS){
394
fprintf(stderr, "\n*** Handshake failed ***\n");
395
gnutls_perror (ret);
547
if(debug){
548
fprintf(stderr, "*** GnuTLS Handshake failed ***\n");
549
gnutls_perror (ret);
550
}
396
551
retval = -1;
397
goto exit;
552
goto mandos_end;
398
553
}
399
400
//Retrieve gpg packet that contains the wanted password
401
554
555
/* Read OpenPGP packet that contains the wanted password */
556
402
557
if(debug){
403
fprintf(stderr, "Retrieving pgp encrypted password from %s\n", ip);
558
fprintf(stderr, "Retrieving pgp encrypted password from %s\n",
559
ip);
404
560
}
405
561
406
562
while(true){
407
if (buffer_length + BUFFER_SIZE > buffer_capacity){
408
buffer = realloc(buffer, buffer_capacity + BUFFER_SIZE);
409
if (buffer == NULL){
410
perror("realloc");
411
goto exit;
412
}
413
buffer_capacity += BUFFER_SIZE;
563
buffer_capacity = adjustbuffer(&buffer, buffer_length,
564
buffer_capacity);
565
if (buffer_capacity == 0){
566
perror("adjustbuffer");
567
retval = -1;
568
goto mandos_end;
414
569
}
415
570
416
ret = gnutls_record_recv
417
(es.session, buffer+buffer_length, BUFFER_SIZE);
571
ret = gnutls_record_recv(session, buffer+buffer_length,
572
BUFFER_SIZE);
418
573
if (ret == 0){
419
574
break;
420
575
}
424
579
case GNUTLS_E_AGAIN:
425
580
break;
426
581
case GNUTLS_E_REHANDSHAKE:
427
ret = gnutls_handshake (es.session);
582
do{
583
ret = gnutls_handshake (session);
584
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
428
585
if (ret < 0){
429
fprintf(stderr, "\n*** Handshake failed ***\n");
586
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
430
587
gnutls_perror (ret);
431
588
retval = -1;
432
goto exit;
589
goto mandos_end;
433
590
}
434
591
break;
435
592
default:
436
fprintf(stderr, "Unknown error while reading data from encrypted session with mandos server\n");
593
fprintf(stderr, "Unknown error while reading data from"
594
" encrypted session with Mandos server\n");
437
595
retval = -1;
438
gnutls_bye (es.session, GNUTLS_SHUT_RDWR);
439
goto exit;
596
gnutls_bye (session, GNUTLS_SHUT_RDWR);
597
goto mandos_end;
440
598
}
441
599
} else {
442
buffer_length += ret;
600
buffer_length += (size_t) ret;
443
601
}
444
602
}
445
603
604
if(debug){
605
fprintf(stderr, "Closing TLS session\n");
606
}
607
608
gnutls_bye (session, GNUTLS_SHUT_RDWR);
609
446
610
if (buffer_length > 0){
447
if ((decrypted_buffer_size = gpg_packet_decrypt(buffer, buffer_length, &decrypted_buffer, CERT_ROOT)) >= 0){
448
fwrite (decrypted_buffer, 1, decrypted_buffer_size, stdout);
611
decrypted_buffer_size = pgp_packet_decrypt(buffer,
612
buffer_length,
613
&decrypted_buffer,
614
keydir);
615
if (decrypted_buffer_size >= 0){
616
written = 0;
617
while(written < (size_t) decrypted_buffer_size){
618
ret = (int)fwrite (decrypted_buffer + written, 1,
619
(size_t)decrypted_buffer_size - written,
620
stdout);
621
if(ret == 0 and ferror(stdout)){
622
if(debug){
623
fprintf(stderr, "Error writing encrypted data: %s\n",
624
strerror(errno));
625
}
626
retval = -1;
627
break;
628
}
629
written += (size_t)ret;
630
}
449
631
free(decrypted_buffer);
450
632
} else {
451
633
retval = -1;
452
634
}
453
635
}
454
455
//shutdown procedure
456
457
if(debug){
458
fprintf(stderr, "Closing tls session\n");
459
}
460
636
637
/* Shutdown procedure */
638
639
mandos_end:
461
640
free(buffer);
462
gnutls_bye (es.session, GNUTLS_SHUT_RDWR);
463
exit:
464
641
close(tcp_sd);
465
gnutls_deinit (es.session);
466
gnutls_certificate_free_credentials (es.cred);
467
gnutls_global_deinit ();
642
gnutls_deinit (session);
468
643
return retval;
469
644
}
470
645
471
static AvahiSimplePoll *simple_poll = NULL;
472
static AvahiServer *server = NULL;
473
474
static void resolve_callback(
475
AvahiSServiceResolver *r,
476
AVAHI_GCC_UNUSED AvahiIfIndex interface,
477
AVAHI_GCC_UNUSED AvahiProtocol protocol,
478
AvahiResolverEvent event,
479
const char *name,
480
const char *type,
481
const char *domain,
482
const char *host_name,
483
const AvahiAddress *address,
484
uint16_t port,
485
AvahiStringList *txt,
486
AvahiLookupResultFlags flags,
487
AVAHI_GCC_UNUSED void* userdata) {
488
489
assert(r);
490
491
/* Called whenever a service has been resolved successfully or timed out */
492
493
switch (event) {
494
case AVAHI_RESOLVER_FAILURE:
495
fprintf(stderr, "(Resolver) Failed to resolve service '%s' of type '%s' in domain '%s': %s\n", name, type, domain, avahi_strerror(avahi_server_errno(server)));
496
break;
497
498
case AVAHI_RESOLVER_FOUND: {
499
char ip[AVAHI_ADDRESS_STR_MAX];
500
avahi_address_snprint(ip, sizeof(ip), address);
501
if(debug){
502
fprintf(stderr, "Mandos server found at %s on port %d\n", ip, port);
503
}
504
int ret = start_mandos_communcation(ip, port);
505
if (ret == 0){
506
exit(EXIT_SUCCESS);
507
} else {
508
exit(EXIT_FAILURE);
509
}
510
}
511
}
512
avahi_s_service_resolver_free(r);
513
}
514
515
static void browse_callback(
516
AvahiSServiceBrowser *b,
517
AvahiIfIndex interface,
518
AvahiProtocol protocol,
519
AvahiBrowserEvent event,
520
const char *name,
521
const char *type,
522
const char *domain,
523
AVAHI_GCC_UNUSED AvahiLookupResultFlags flags,
524
void* userdata) {
525
526
AvahiServer *s = userdata;
527
assert(b);
528
529
/* Called whenever a new services becomes available on the LAN or is removed from the LAN */
530
531
switch (event) {
532
533
case AVAHI_BROWSER_FAILURE:
534
535
fprintf(stderr, "(Browser) %s\n", avahi_strerror(avahi_server_errno(server)));
536
avahi_simple_poll_quit(simple_poll);
537
return;
538
539
case AVAHI_BROWSER_NEW:
540
/* We ignore the returned resolver object. In the callback
541
function we free it. If the server is terminated before
542
the callback function is called the server will free
543
the resolver for us. */
544
545
if (!(avahi_s_service_resolver_new(s, interface, protocol, name, type, domain, AVAHI_PROTO_INET6, 0, resolve_callback, s)))
546
fprintf(stderr, "Failed to resolve service '%s': %s\n", name, avahi_strerror(avahi_server_errno(s)));
547
548
break;
549
550
case AVAHI_BROWSER_REMOVE:
551
break;
552
553
case AVAHI_BROWSER_ALL_FOR_NOW:
554
case AVAHI_BROWSER_CACHE_EXHAUSTED:
555
break;
556
}
557
}
558
559
int main(AVAHI_GCC_UNUSED int argc, AVAHI_GCC_UNUSED char*argv[]) {
560
AvahiServerConfig config;
646
static void resolve_callback(AvahiSServiceResolver *r,
647
AvahiIfIndex interface,
648
AVAHI_GCC_UNUSED AvahiProtocol protocol,
649
AvahiResolverEvent event,
650
const char *name,
651
const char *type,
652
const char *domain,
653
const char *host_name,
654
const AvahiAddress *address,
655
uint16_t port,
656
AVAHI_GCC_UNUSED AvahiStringList *txt,
657
AVAHI_GCC_UNUSED AvahiLookupResultFlags
658
flags,
659
void* userdata) {
660
mandos_context *mc = userdata;
661
assert(r); /* Spurious warning */
662
663
/* Called whenever a service has been resolved successfully or
664
timed out */
665
666
switch (event) {
667
default:
668
case AVAHI_RESOLVER_FAILURE:
669
fprintf(stderr, "(Avahi Resolver) Failed to resolve service '%s'"
670
" of type '%s' in domain '%s': %s\n", name, type, domain,
671
avahi_strerror(avahi_server_errno(mc->server)));
672
break;
673
674
case AVAHI_RESOLVER_FOUND:
675
{
676
char ip[AVAHI_ADDRESS_STR_MAX];
677
avahi_address_snprint(ip, sizeof(ip), address);
678
if(debug){
679
fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %"
680
PRIu16 ") on port %d\n", name, host_name, ip,
681
interface, port);
682
}
683
int ret = start_mandos_communication(ip, port, interface, mc);
684
if (ret == 0){
685
exit(EXIT_SUCCESS);
686
}
687
}
688
}
689
avahi_s_service_resolver_free(r);
690
}
691
692
static void browse_callback( AvahiSServiceBrowser *b,
693
AvahiIfIndex interface,
694
AvahiProtocol protocol,
695
AvahiBrowserEvent event,
696
const char *name,
697
const char *type,
698
const char *domain,
699
AVAHI_GCC_UNUSED AvahiLookupResultFlags
700
flags,
701
void* userdata) {
702
mandos_context *mc = userdata;
703
assert(b); /* Spurious warning */
704
705
/* Called whenever a new services becomes available on the LAN or
706
is removed from the LAN */
707
708
switch (event) {
709
default:
710
case AVAHI_BROWSER_FAILURE:
711
712
fprintf(stderr, "(Avahi browser) %s\n",
713
avahi_strerror(avahi_server_errno(mc->server)));
714
avahi_simple_poll_quit(mc->simple_poll);
715
return;
716
717
case AVAHI_BROWSER_NEW:
718
/* We ignore the returned Avahi resolver object. In the callback
719
function we free it. If the Avahi server is terminated before
720
the callback function is called the Avahi server will free the
721
resolver for us. */
722
723
if (!(avahi_s_service_resolver_new(mc->server, interface,
724
protocol, name, type, domain,
725
AVAHI_PROTO_INET6, 0,
726
resolve_callback, mc)))
727
fprintf(stderr, "Avahi: Failed to resolve service '%s': %s\n",
728
name, avahi_strerror(avahi_server_errno(mc->server)));
729
break;
730
731
case AVAHI_BROWSER_REMOVE:
732
break;
733
734
case AVAHI_BROWSER_ALL_FOR_NOW:
735
case AVAHI_BROWSER_CACHE_EXHAUSTED:
736
if(debug){
737
fprintf(stderr, "No Mandos server found, still searching...\n");
738
}
739
break;
740
}
741
}
742
743
/* Combines file name and path and returns the malloced new
744
string. some sane checks could/should be added */
745
static const char *combinepath(const char *first, const char *second){
746
size_t f_len = strlen(first);
747
size_t s_len = strlen(second);
748
char *tmp = malloc(f_len + s_len + 2);
749
if (tmp == NULL){
750
return NULL;
751
}
752
if(f_len > 0){
753
memcpy(tmp, first, f_len); /* Spurious warning */
754
}
755
tmp[f_len] = '/';
756
if(s_len > 0){
757
memcpy(tmp + f_len + 1, second, s_len); /* Spurious warning */
758
}
759
tmp[f_len + 1 + s_len] = '\0';
760
return tmp;
761
}
762
763
764
int main(int argc, char *argv[]){
561
765
AvahiSServiceBrowser *sb = NULL;
562
766
int error;
563
767
int ret;
564
int returncode = EXIT_SUCCESS;
565
566
while (true){
567
static struct option long_options[] = {
568
{"debug", no_argument, (int *)&debug, 1},
569
{"interface", required_argument, 0, 'i'},
570
{0, 0, 0, 0} };
571
572
int option_index = 0;
573
ret = getopt_long (argc, argv, "i:", long_options, &option_index);
574
575
if (ret == -1){
576
break;
577
}
578
579
switch(ret){
580
case 0:
581
break;
582
case 'i':
583
interface = optarg;
584
break;
585
default:
586
exit(EXIT_FAILURE);
587
}
768
int exitcode = EXIT_SUCCESS;
769
const char *interface = "eth0";
770
struct ifreq network;
771
int sd;
772
uid_t uid;
773
gid_t gid;
774
char *connect_to = NULL;
775
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
776
const char *pubkeyfile = "pubkey.txt";
777
const char *seckeyfile = "seckey.txt";
778
mandos_context mc = { .simple_poll = NULL, .server = NULL,
779
.dh_bits = 1024, .priority = "SECURE256"};
780
bool gnutls_initalized = false;
781
782
{
783
struct argp_option options[] = {
784
{ .name = "debug", .key = 128,
785
.doc = "Debug mode", .group = 3 },
786
{ .name = "connect", .key = 'c',
787
.arg = "IP",
788
.doc = "Connect directly to a sepcified mandos server",
789
.group = 1 },
790
{ .name = "interface", .key = 'i',
791
.arg = "INTERFACE",
792
.doc = "Interface that Avahi will conntect through",
793
.group = 1 },
794
{ .name = "keydir", .key = 'd',
795
.arg = "KEYDIR",
796
.doc = "Directory where the openpgp keyring is",
797
.group = 1 },
798
{ .name = "seckey", .key = 's',
799
.arg = "SECKEY",
800
.doc = "Secret openpgp key for gnutls authentication",
801
.group = 1 },
802
{ .name = "pubkey", .key = 'p',
803
.arg = "PUBKEY",
804
.doc = "Public openpgp key for gnutls authentication",
805
.group = 2 },
806
{ .name = "dh-bits", .key = 129,
807
.arg = "BITS",
808
.doc = "dh-bits to use in gnutls communication",
809
.group = 2 },
810
{ .name = "priority", .key = 130,
811
.arg = "PRIORITY",
812
.doc = "GNUTLS priority", .group = 1 },
813
{ .name = NULL }
814
};
815
816
817
error_t parse_opt (int key, char *arg,
818
struct argp_state *state) {
819
/* Get the INPUT argument from `argp_parse', which we know is
820
a pointer to our plugin list pointer. */
821
switch (key) {
822
case 128:
823
debug = true;
824
break;
825
case 'c':
826
connect_to = arg;
827
break;
828
case 'i':
829
interface = arg;
830
break;
831
case 'd':
832
keydir = arg;
833
break;
834
case 's':
835
seckeyfile = arg;
836
break;
837
case 'p':
838
pubkeyfile = arg;
839
break;
840
case 129:
841
errno = 0;
842
mc.dh_bits = (unsigned int) strtol(arg, NULL, 10);
843
if (errno){
844
perror("strtol");
845
exit(EXIT_FAILURE);
846
}
847
break;
848
case 130:
849
mc.priority = arg;
850
break;
851
case ARGP_KEY_ARG:
852
argp_usage (state);
853
break;
854
case ARGP_KEY_END:
855
break;
856
default:
857
return ARGP_ERR_UNKNOWN;
858
}
859
return 0;
860
}
861
862
struct argp argp = { .options = options, .parser = parse_opt,
863
.args_doc = "",
864
.doc = "Mandos client -- Get and decrypt"
865
" passwords from mandos server" };
866
ret = argp_parse (&argp, argc, argv, 0, 0, NULL);
867
if (ret == ARGP_ERR_UNKNOWN){
868
fprintf(stderr, "Unknown error while parsing arguments\n");
869
exitcode = EXIT_FAILURE;
870
goto end;
871
}
872
}
873
874
pubkeyfile = combinepath(keydir, pubkeyfile);
875
if (pubkeyfile == NULL){
876
perror("combinepath");
877
exitcode = EXIT_FAILURE;
878
goto end;
879
}
880
881
seckeyfile = combinepath(keydir, seckeyfile);
882
if (seckeyfile == NULL){
883
perror("combinepath");
884
exitcode = EXIT_FAILURE;
885
goto end;
886
}
887
888
ret = init_gnutls_global(&mc, pubkeyfile, seckeyfile);
889
if (ret == -1){
890
fprintf(stderr, "init_gnutls_global failed\n");
891
exitcode = EXIT_FAILURE;
892
goto end;
893
} else {
894
gnutls_initalized = true;
895
}
896
897
/* If the interface is down, bring it up */
898
{
899
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
900
if(sd < 0) {
901
perror("socket");
902
exitcode = EXIT_FAILURE;
903
goto end;
904
}
905
strcpy(network.ifr_name, interface); /* Spurious warning */
906
ret = ioctl(sd, SIOCGIFFLAGS, &network);
907
if(ret == -1){
908
perror("ioctl SIOCGIFFLAGS");
909
exitcode = EXIT_FAILURE;
910
goto end;
911
}
912
if((network.ifr_flags & IFF_UP) == 0){
913
network.ifr_flags |= IFF_UP;
914
ret = ioctl(sd, SIOCSIFFLAGS, &network);
915
if(ret == -1){
916
perror("ioctl SIOCSIFFLAGS");
917
exitcode = EXIT_FAILURE;
918
goto end;
919
}
920
}
921
close(sd);
922
}
923
924
uid = getuid();
925
gid = getgid();
926
927
ret = setuid(uid);
928
if (ret == -1){
929
perror("setuid");
930
}
931
932
setgid(gid);
933
if (ret == -1){
934
perror("setgid");
935
}
936
937
if_index = (AvahiIfIndex) if_nametoindex(interface);
938
if(if_index == 0){
939
fprintf(stderr, "No such interface: \"%s\"\n", interface);
940
exit(EXIT_FAILURE);
941
}
942
943
if(connect_to != NULL){
944
/* Connect directly, do not use Zeroconf */
945
/* (Mainly meant for debugging) */
946
char *address = strrchr(connect_to, ':');
947
if(address == NULL){
948
fprintf(stderr, "No colon in address\n");
949
exitcode = EXIT_FAILURE;
950
goto end;
951
}
952
errno = 0;
953
uint16_t port = (uint16_t) strtol(address+1, NULL, 10);
954
if(errno){
955
perror("Bad port number");
956
exitcode = EXIT_FAILURE;
957
goto end;
958
}
959
*address = '\0';
960
address = connect_to;
961
ret = start_mandos_communication(address, port, if_index, &mc);
962
if(ret < 0){
963
exitcode = EXIT_FAILURE;
964
} else {
965
exitcode = EXIT_SUCCESS;
966
}
967
goto end;
588
968
}
589
969
590
970
if (not debug){
591
971
avahi_set_log_function(empty_log);
592
972
}
593
973
594
/* Initialize the psuedo-RNG */
595
srand(time(NULL));
596
597
/* Allocate main loop object */
598
if (!(simple_poll = avahi_simple_poll_new())) {
599
fprintf(stderr, "Failed to create simple poll object.\n");
600
601
goto exit;
602
}
603
604
/* Do not publish any local records */
605
avahi_server_config_init(&config);
606
config.publish_hinfo = 0;
607
config.publish_addresses = 0;
608
config.publish_workstation = 0;
609
config.publish_domain = 0;
610
611
/* Allocate a new server */
612
server = avahi_server_new(avahi_simple_poll_get(simple_poll), &config, NULL, NULL, &error);
613
614
/* Free the configuration data */
615
avahi_server_config_free(&config);
616
617
/* Check if creating the server object succeeded */
618
if (!server) {
619
fprintf(stderr, "Failed to create server: %s\n", avahi_strerror(error));
620
returncode = EXIT_FAILURE;
621
goto exit;
622
}
623
624
/* Create the service browser */
625
if (!(sb = avahi_s_service_browser_new(server, if_nametoindex("eth0"), AVAHI_PROTO_INET6, "_mandos._tcp", NULL, 0, browse_callback, server))) {
626
fprintf(stderr, "Failed to create service browser: %s\n", avahi_strerror(avahi_server_errno(server)));
627
returncode = EXIT_FAILURE;
628
goto exit;
974
/* Initialize the pseudo-RNG for Avahi */
975
srand((unsigned int) time(NULL));
976
977
/* Allocate main Avahi loop object */
978
mc.simple_poll = avahi_simple_poll_new();
979
if (mc.simple_poll == NULL) {
980
fprintf(stderr, "Avahi: Failed to create simple poll"
981
" object.\n");
982
exitcode = EXIT_FAILURE;
983
goto end;
984
}
985
986
{
987
AvahiServerConfig config;
988
/* Do not publish any local Zeroconf records */
989
avahi_server_config_init(&config);
990
config.publish_hinfo = 0;
991
config.publish_addresses = 0;
992
config.publish_workstation = 0;
993
config.publish_domain = 0;
994
995
/* Allocate a new server */
996
mc.server = avahi_server_new(avahi_simple_poll_get
997
(mc.simple_poll), &config, NULL,
998
NULL, &error);
999
1000
/* Free the Avahi configuration data */
1001
avahi_server_config_free(&config);
1002
}
1003
1004
/* Check if creating the Avahi server object succeeded */
1005
if (mc.server == NULL) {
1006
fprintf(stderr, "Failed to create Avahi server: %s\n",
1007
avahi_strerror(error));
1008
exitcode = EXIT_FAILURE;
1009
goto end;
1010
}
1011
1012
/* Create the Avahi service browser */
1013
sb = avahi_s_service_browser_new(mc.server, if_index,
1014
AVAHI_PROTO_INET6,
1015
"_mandos._tcp", NULL, 0,
1016
browse_callback, &mc);
1017
if (sb == NULL) {
1018
fprintf(stderr, "Failed to create service browser: %s\n",
1019
avahi_strerror(avahi_server_errno(mc.server)));
1020
exitcode = EXIT_FAILURE;
1021
goto end;
629
1022
}
630
1023
631
1024
/* Run the main loop */
632
1025
633
1026
if (debug){
634
fprintf(stderr, "Starting avahi loop search\n");
1027
fprintf(stderr, "Starting Avahi loop search\n");
635
1028
}
636
1029
637
avahi_simple_poll_loop(simple_poll);
1030
avahi_simple_poll_loop(mc.simple_poll);
638
1031
639
exit:
1032
end:
640
1033
641
1034
if (debug){
642
1035
fprintf(stderr, "%s exiting\n", argv[0]);
643
1036
}
644
1037
645
1038
/* Cleanup things */
646
if (sb)
1039
if (sb != NULL)
647
1040
avahi_s_service_browser_free(sb);
648
1041
649
if (server)
650
avahi_server_free(server);
651
652
if (simple_poll)
653
avahi_simple_poll_free(simple_poll);
654
655
return returncode;
1042
if (mc.server != NULL)
1043
avahi_server_free(mc.server);
1044
1045
if (mc.simple_poll != NULL)
1046
avahi_simple_poll_free(mc.simple_poll);
1047
free(pubkeyfile);
1048
free(seckeyfile);
1049
1050
if (gnutls_initalized){
1051
gnutls_certificate_free_credentials(mc.cred);
1052
gnutls_global_deinit ();
1053
}
1054
1055
return exitcode;
656
1056
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0