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- Committer: Björn Påhlsson
- Date: 2008-07-20 23:34:51 UTC
- mto: This revision was merged to the branch mainline in revision 17.
- Revision ID: belorn@braxen-20080720233451-720put8qyxqvk2ld
Added debug options from passprompt as --debug and --debug=passprompt
- files added:
- ca.pem
- files removed:
- mandos-client.xml
- files renamed:
- clients.conf => mandos-clients.conf
- mandos-client.c => plugbasedclient.c
- plugins.d/password-request.c => plugins.d/mandosclient.c
- plugins.d/password-prompt.c => plugins.d/passprompt.c
- mandos => server.py
- files modified:
- Makefile
added
removed
plugins.d/mandosclient.c
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
*/
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
***/
30
19
31
/* Needed by GPGME, specifically gpgme_data_seek() */
32
20
#define _LARGEFILE_SOURCE
33
21
#define _FILE_OFFSET_BITS 64
34
22
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 <net/if.h> /* ifreq, SIOCGIFFLAGS, SIOCSIFFLAGS,
48
IFF_UP */
49
#include <sys/types.h> /* socket(), inet_pton(), sockaddr,
50
sockaddr_in6, PF_INET6,
51
SOCK_STREAM, INET6_ADDRSTRLEN,
52
uid_t, gid_t */
53
#include <inttypes.h> /* PRIu16 */
54
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
55
struct in6_addr, inet_pton(),
56
connect() */
57
#include <assert.h> /* assert() */
58
#include <errno.h> /* perror(), errno */
59
#include <time.h> /* time() */
60
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
61
SIOCSIFFLAGS, if_indextoname(),
62
if_nametoindex(), IF_NAMESIZE */
63
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
64
getuid(), getgid(), setuid(),
65
setgid() */
66
#include <netinet/in.h>
67
#include <arpa/inet.h> /* inet_pton(), htons */
68
#include <iso646.h> /* not, and */
69
#include <argp.h> /* struct argp_option, error_t, struct
70
argp_state, struct argp,
71
argp_parse(), ARGP_KEY_ARG,
72
ARGP_KEY_END, ARGP_ERR_UNKNOWN */
73
74
/* Avahi */
75
/* All Avahi types, constants and functions
76
Avahi*, avahi_*,
77
AVAHI_* */
23
#include <stdio.h>
24
#include <assert.h>
25
#include <stdlib.h>
26
#include <time.h>
27
#include <net/if.h> /* if_nametoindex */
28
78
29
#include <avahi-core/core.h>
79
30
#include <avahi-core/lookup.h>
80
31
#include <avahi-core/log.h>
82
33
#include <avahi-common/malloc.h>
83
34
#include <avahi-common/error.h>
84
35
85
/* GnuTLS */
86
#include <gnutls/gnutls.h> /* All GnuTLS types, constants and functions
87
gnutls_*
88
init_gnutls_session(),
89
GNUTLS_* */
90
#include <gnutls/openpgp.h> /* gnutls_certificate_set_openpgp_key_file(),
91
GNUTLS_OPENPGP_FMT_BASE64 */
92
93
/* GPGME */
94
#include <gpgme.h> /* All GPGME types, constants and functions
95
gpgme_*
96
GPGME_PROTOCOL_OpenPGP,
97
GPG_ERR_NO_* */
98
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
54
#ifndef CERT_ROOT
55
#define CERT_ROOT "/conf/conf.d/cryptkeyreq/"
56
#endif
57
#define CERTFILE CERT_ROOT "openpgp-client.txt"
58
#define KEYFILE CERT_ROOT "openpgp-client-key.txt"
99
59
#define BUFFER_SIZE 256
60
#define DH_BITS 1024
100
61
101
62
bool debug = false;
102
static const char *keydir = "/conf/conf.d/mandos";
103
static const char mandos_protocol_version[] = "1";
104
const char *argp_program_version = "password-request 1.0";
105
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
106
63
107
/* Used for passing in values through the Avahi callback functions */
108
64
typedef struct {
109
AvahiSimplePoll *simple_poll;
110
AvahiServer *server;
65
gnutls_session_t session;
111
66
gnutls_certificate_credentials_t cred;
112
unsigned int dh_bits;
113
67
gnutls_dh_params_t dh_params;
114
const char *priority;
115
} mandos_context;
116
117
/*
118
* Make room in "buffer" for at least BUFFER_SIZE additional bytes.
119
* "buffer_capacity" is how much is currently allocated,
120
* "buffer_length" is how much is already used.
121
*/
122
size_t adjustbuffer(char **buffer, size_t buffer_length,
123
size_t buffer_capacity){
124
if (buffer_length + BUFFER_SIZE > buffer_capacity){
125
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
126
if (buffer == NULL){
127
return 0;
128
}
129
buffer_capacity += BUFFER_SIZE;
130
}
131
return buffer_capacity;
132
}
133
134
/*
135
* Decrypt OpenPGP data using keyrings in HOMEDIR.
136
* Returns -1 on error
137
*/
138
static ssize_t pgp_packet_decrypt (const char *cryptotext,
139
size_t crypto_size,
140
char **plaintext,
141
const char *homedir){
68
} encrypted_session;
69
70
71
ssize_t gpg_packet_decrypt (char *packet, size_t packet_size, char **new_packet, char *homedir){
142
72
gpgme_data_t dh_crypto, dh_plain;
143
73
gpgme_ctx_t ctx;
144
74
gpgme_error_t rc;
145
75
ssize_t ret;
146
size_t plaintext_capacity = 0;
147
ssize_t plaintext_length = 0;
76
size_t new_packet_capacity = 0;
77
size_t new_packet_length = 0;
148
78
gpgme_engine_info_t engine_info;
149
79
150
80
if (debug){
151
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
81
fprintf(stderr, "Attempting to decrypt password from gpg packet\n");
152
82
}
153
83
154
84
/* Init GPGME */
155
85
gpgme_check_version(NULL);
156
rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
157
if (rc != GPG_ERR_NO_ERROR){
158
fprintf(stderr, "bad gpgme_engine_check_version: %s: %s\n",
159
gpgme_strsource(rc), gpgme_strerror(rc));
160
return -1;
161
}
86
gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
162
87
163
/* Set GPGME home directory for the OpenPGP engine only */
88
/* Set GPGME home directory */
164
89
rc = gpgme_get_engine_info (&engine_info);
165
90
if (rc != GPG_ERR_NO_ERROR){
166
91
fprintf(stderr, "bad gpgme_get_engine_info: %s: %s\n",
176
101
engine_info = engine_info->next;
177
102
}
178
103
if(engine_info == NULL){
179
fprintf(stderr, "Could not set GPGME home dir to %s\n", homedir);
104
fprintf(stderr, "Could not set home dir to %s\n", homedir);
180
105
return -1;
181
106
}
182
107
183
/* Create new GPGME data buffer from memory cryptotext */
184
rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,
185
0);
108
/* Create new GPGME data buffer from packet buffer */
109
rc = gpgme_data_new_from_mem(&dh_crypto, packet, packet_size, 0);
186
110
if (rc != GPG_ERR_NO_ERROR){
187
111
fprintf(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
188
112
gpgme_strsource(rc), gpgme_strerror(rc));
194
118
if (rc != GPG_ERR_NO_ERROR){
195
119
fprintf(stderr, "bad gpgme_data_new: %s: %s\n",
196
120
gpgme_strsource(rc), gpgme_strerror(rc));
197
gpgme_data_release(dh_crypto);
198
121
return -1;
199
122
}
200
123
203
126
if (rc != GPG_ERR_NO_ERROR){
204
127
fprintf(stderr, "bad gpgme_new: %s: %s\n",
205
128
gpgme_strsource(rc), gpgme_strerror(rc));
206
plaintext_length = -1;
207
goto decrypt_end;
129
return -1;
208
130
}
209
131
210
/* Decrypt data from the cryptotext data buffer to the plaintext
211
data buffer */
132
/* Decrypt data from the FILE pointer to the plaintext data buffer */
212
133
rc = gpgme_op_decrypt(ctx, dh_crypto, dh_plain);
213
134
if (rc != GPG_ERR_NO_ERROR){
214
135
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
215
136
gpgme_strsource(rc), gpgme_strerror(rc));
216
plaintext_length = -1;
217
goto decrypt_end;
137
return -1;
218
138
}
219
139
220
140
if(debug){
221
fprintf(stderr, "Decryption of OpenPGP data succeeded\n");
141
fprintf(stderr, "decryption of gpg packet succeeded\n");
222
142
}
223
143
224
144
if (debug){
225
145
gpgme_decrypt_result_t result;
226
146
result = gpgme_op_decrypt_result(ctx);
227
147
if (result == NULL){
228
148
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
229
149
} else {
230
fprintf(stderr, "Unsupported algorithm: %s\n",
231
result->unsupported_algorithm);
232
fprintf(stderr, "Wrong key usage: %u\n",
233
result->wrong_key_usage);
150
fprintf(stderr, "Unsupported algorithm: %s\n", result->unsupported_algorithm);
151
fprintf(stderr, "Wrong key usage: %d\n", result->wrong_key_usage);
234
152
if(result->file_name != NULL){
235
153
fprintf(stderr, "File name: %s\n", result->file_name);
236
154
}
242
160
gpgme_pubkey_algo_name(recipient->pubkey_algo));
243
161
fprintf(stderr, "Key ID: %s\n", recipient->keyid);
244
162
fprintf(stderr, "Secret key available: %s\n",
245
recipient->status == GPG_ERR_NO_SECKEY
246
? "No" : "Yes");
163
recipient->status == GPG_ERR_NO_SECKEY ? "No" : "Yes");
247
164
recipient = recipient->next;
248
165
}
249
166
}
250
167
}
251
168
}
252
169
170
/* Delete the GPGME FILE pointer cryptotext data buffer */
171
gpgme_data_release(dh_crypto);
172
253
173
/* Seek back to the beginning of the GPGME plaintext data buffer */
254
if (gpgme_data_seek(dh_plain, (off_t) 0, SEEK_SET) == -1){
255
perror("pgpme_data_seek");
256
plaintext_length = -1;
257
goto decrypt_end;
258
}
259
260
*plaintext = NULL;
174
gpgme_data_seek(dh_plain, 0, SEEK_SET);
175
176
*new_packet = 0;
261
177
while(true){
262
plaintext_capacity = adjustbuffer(plaintext,
263
(size_t)plaintext_length,
264
plaintext_capacity);
265
if (plaintext_capacity == 0){
266
perror("adjustbuffer");
267
plaintext_length = -1;
268
goto decrypt_end;
178
if (new_packet_length + BUFFER_SIZE > new_packet_capacity){
179
*new_packet = realloc(*new_packet, new_packet_capacity + BUFFER_SIZE);
180
if (*new_packet == NULL){
181
perror("realloc");
182
return -1;
183
}
184
new_packet_capacity += BUFFER_SIZE;
269
185
}
270
186
271
ret = gpgme_data_read(dh_plain, *plaintext + plaintext_length,
272
BUFFER_SIZE);
187
ret = gpgme_data_read(dh_plain, *new_packet + new_packet_length, BUFFER_SIZE);
273
188
/* Print the data, if any */
274
189
if (ret == 0){
275
/* EOF */
190
/* If password is empty, then a incorrect error will be printed */
276
191
break;
277
192
}
278
193
if(ret < 0){
279
194
perror("gpgme_data_read");
280
plaintext_length = -1;
281
goto decrypt_end;
195
return -1;
282
196
}
283
plaintext_length += ret;
197
new_packet_length += ret;
284
198
}
285
199
286
200
if(debug){
287
fprintf(stderr, "Decrypted password is: ");
288
for(ssize_t i = 0; i < plaintext_length; i++){
289
fprintf(stderr, "%02hhX ", (*plaintext)[i]);
290
}
291
fprintf(stderr, "\n");
201
fprintf(stderr, "decrypted password is: %s\n", *new_packet);
292
202
}
293
294
decrypt_end:
295
296
/* Delete the GPGME cryptotext data buffer */
297
gpgme_data_release(dh_crypto);
298
299
/* Delete the GPGME plaintext data buffer */
203
204
/* Delete the GPGME plaintext data buffer */
300
205
gpgme_data_release(dh_plain);
301
return plaintext_length;
206
return new_packet_length;
302
207
}
303
208
304
209
static const char * safer_gnutls_strerror (int value) {
308
213
return ret;
309
214
}
310
215
311
/* GnuTLS log function callback */
312
static void debuggnutls(__attribute__((unused)) int level,
313
const char* string){
314
fprintf(stderr, "GnuTLS: %s", string);
216
void debuggnutls(int level, const char* string){
217
fprintf(stderr, "%s", string);
315
218
}
316
219
317
static int init_gnutls_global(mandos_context *mc,
318
const char *pubkeyfile,
319
const char *seckeyfile){
220
int initgnutls(encrypted_session *es){
221
const char *err;
320
222
int ret;
321
223
322
224
if(debug){
323
fprintf(stderr, "Initializing GnuTLS\n");
225
fprintf(stderr, "Initializing gnutls\n");
324
226
}
227
325
228
326
ret = gnutls_global_init();
327
if (ret != GNUTLS_E_SUCCESS) {
328
fprintf (stderr, "GnuTLS global_init: %s\n",
329
safer_gnutls_strerror(ret));
229
if ((ret = gnutls_global_init ())
230
!= GNUTLS_E_SUCCESS) {
231
fprintf (stderr, "global_init: %s\n", safer_gnutls_strerror(ret));
330
232
return -1;
331
233
}
332
234
333
235
if (debug){
334
/* "Use a log level over 10 to enable all debugging options."
335
* - GnuTLS manual
336
*/
337
236
gnutls_global_set_log_level(11);
338
237
gnutls_global_set_log_function(debuggnutls);
339
238
}
340
239
341
/* OpenPGP credentials */
342
gnutls_certificate_allocate_credentials(&mc->cred);
343
if (ret != GNUTLS_E_SUCCESS){
344
fprintf (stderr, "GnuTLS memory error: %s\n",
345
safer_gnutls_strerror(ret));
346
gnutls_global_deinit ();
240
241
/* openpgp credentials */
242
if ((ret = gnutls_certificate_allocate_credentials (&es->cred))
243
!= GNUTLS_E_SUCCESS) {
244
fprintf (stderr, "memory error: %s\n", safer_gnutls_strerror(ret));
347
245
return -1;
348
246
}
349
247
350
248
if(debug){
351
fprintf(stderr, "Attempting to use OpenPGP certificate %s"
352
" and keyfile %s as GnuTLS credentials\n", pubkeyfile,
353
seckeyfile);
249
fprintf(stderr, "Attempting to use openpgp certificate %s"
250
" and keyfile %s as gnutls credentials\n", CERTFILE, KEYFILE);
354
251
}
355
252
356
253
ret = gnutls_certificate_set_openpgp_key_file
357
(mc->cred, pubkeyfile, seckeyfile, GNUTLS_OPENPGP_FMT_BASE64);
358
if (ret != GNUTLS_E_SUCCESS) {
359
fprintf(stderr,
360
"Error[%d] while reading the OpenPGP key pair ('%s',"
361
" '%s')\n", ret, pubkeyfile, seckeyfile);
362
fprintf(stdout, "The GnuTLS error is: %s\n",
363
safer_gnutls_strerror(ret));
364
goto globalfail;
365
}
366
367
/* GnuTLS server initialization */
368
ret = gnutls_dh_params_init(&mc->dh_params);
369
if (ret != GNUTLS_E_SUCCESS) {
370
fprintf (stderr, "Error in GnuTLS DH parameter initialization:"
371
" %s\n", safer_gnutls_strerror(ret));
372
goto globalfail;
373
}
374
ret = gnutls_dh_params_generate2(mc->dh_params, mc->dh_bits);
375
if (ret != GNUTLS_E_SUCCESS) {
376
fprintf (stderr, "Error in GnuTLS prime generation: %s\n",
377
safer_gnutls_strerror(ret));
378
goto globalfail;
379
}
380
381
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
382
383
return 0;
384
385
globalfail:
386
387
gnutls_certificate_free_credentials(mc->cred);
388
gnutls_global_deinit();
389
return -1;
390
391
}
392
393
static int init_gnutls_session(mandos_context *mc,
394
gnutls_session_t *session){
395
int ret;
396
/* GnuTLS session creation */
397
ret = gnutls_init(session, GNUTLS_SERVER);
398
if (ret != GNUTLS_E_SUCCESS){
399
fprintf(stderr, "Error in GnuTLS session initialization: %s\n",
400
safer_gnutls_strerror(ret));
401
}
402
403
{
404
const char *err;
405
ret = gnutls_priority_set_direct(*session, mc->priority, &err);
406
if (ret != GNUTLS_E_SUCCESS) {
407
fprintf(stderr, "Syntax error at: %s\n", err);
408
fprintf(stderr, "GnuTLS error: %s\n",
409
safer_gnutls_strerror(ret));
410
gnutls_deinit (*session);
411
return -1;
412
}
413
}
414
415
ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,
416
mc->cred);
417
if (ret != GNUTLS_E_SUCCESS) {
418
fprintf(stderr, "Error setting GnuTLS credentials: %s\n",
419
safer_gnutls_strerror(ret));
420
gnutls_deinit (*session);
421
return -1;
422
}
423
254
(es->cred, CERTFILE, KEYFILE, GNUTLS_OPENPGP_FMT_BASE64);
255
if (ret != GNUTLS_E_SUCCESS) {
256
fprintf
257
(stderr, "Error[%d] while reading the OpenPGP key pair ('%s', '%s')\n",
258
ret, CERTFILE, KEYFILE);
259
fprintf(stdout, "The Error is: %s\n",
260
safer_gnutls_strerror(ret));
261
return -1;
262
}
263
264
//Gnutls server initialization
265
if ((ret = gnutls_dh_params_init (&es->dh_params))
266
!= GNUTLS_E_SUCCESS) {
267
fprintf (stderr, "Error in dh parameter initialization: %s\n",
268
safer_gnutls_strerror(ret));
269
return -1;
270
}
271
272
if ((ret = gnutls_dh_params_generate2 (es->dh_params, DH_BITS))
273
!= GNUTLS_E_SUCCESS) {
274
fprintf (stderr, "Error in prime generation: %s\n",
275
safer_gnutls_strerror(ret));
276
return -1;
277
}
278
279
gnutls_certificate_set_dh_params (es->cred, es->dh_params);
280
281
// Gnutls session creation
282
if ((ret = gnutls_init (&es->session, GNUTLS_SERVER))
283
!= GNUTLS_E_SUCCESS){
284
fprintf(stderr, "Error in gnutls session initialization: %s\n",
285
safer_gnutls_strerror(ret));
286
}
287
288
if ((ret = gnutls_priority_set_direct (es->session, "NORMAL", &err))
289
!= GNUTLS_E_SUCCESS) {
290
fprintf(stderr, "Syntax error at: %s\n", err);
291
fprintf(stderr, "Gnutls error: %s\n",
292
safer_gnutls_strerror(ret));
293
return -1;
294
}
295
296
if ((ret = gnutls_credentials_set
297
(es->session, GNUTLS_CRD_CERTIFICATE, es->cred))
298
!= GNUTLS_E_SUCCESS) {
299
fprintf(stderr, "Error setting a credentials set: %s\n",
300
safer_gnutls_strerror(ret));
301
return -1;
302
}
303
424
304
/* ignore client certificate if any. */
425
gnutls_certificate_server_set_request (*session,
426
GNUTLS_CERT_IGNORE);
305
gnutls_certificate_server_set_request (es->session, GNUTLS_CERT_IGNORE);
427
306
428
gnutls_dh_set_prime_bits (*session, mc->dh_bits);
307
gnutls_dh_set_prime_bits (es->session, DH_BITS);
429
308
430
309
return 0;
431
310
}
432
311
433
/* Avahi log function callback */
434
static void empty_log(__attribute__((unused)) AvahiLogLevel level,
435
__attribute__((unused)) const char *txt){}
312
void empty_log(AvahiLogLevel level, const char *txt){}
436
313
437
/* Called when a Mandos server is found */
438
static int start_mandos_communication(const char *ip, uint16_t port,
439
AvahiIfIndex if_index,
440
mandos_context *mc){
314
int start_mandos_communcation(char *ip, uint16_t port){
441
315
int ret, tcp_sd;
442
union { struct sockaddr in; struct sockaddr_in6 in6; } to;
316
struct sockaddr_in6 to;
317
struct in6_addr ip_addr;
318
encrypted_session es;
443
319
char *buffer = NULL;
444
320
char *decrypted_buffer;
445
321
size_t buffer_length = 0;
446
322
size_t buffer_capacity = 0;
447
323
ssize_t decrypted_buffer_size;
448
size_t written;
449
324
int retval = 0;
450
char interface[IF_NAMESIZE];
451
gnutls_session_t session;
452
453
ret = init_gnutls_session (mc, &session);
454
if (ret != 0){
455
return -1;
456
}
457
325
const char interface[] = "eth0";
326
458
327
if(debug){
459
fprintf(stderr, "Setting up a tcp connection to %s, port %" PRIu16
460
"\n", ip, port);
328
fprintf(stderr, "Setting up a tcp connection to %s\n", ip);
461
329
}
462
330
463
331
tcp_sd = socket(PF_INET6, SOCK_STREAM, 0);
467
335
}
468
336
469
337
if(debug){
470
if(if_indextoname((unsigned int)if_index, interface) == NULL){
471
perror("if_indextoname");
472
return -1;
473
}
474
338
fprintf(stderr, "Binding to interface %s\n", interface);
475
339
}
340
341
ret = setsockopt(tcp_sd, SOL_SOCKET, SO_BINDTODEVICE, interface, 5);
342
if(tcp_sd < 0) {
343
perror("setsockopt bindtodevice");
344
return -1;
345
}
476
346
477
memset(&to,0,sizeof(to)); /* Spurious warning */
478
to.in6.sin6_family = AF_INET6;
479
/* It would be nice to have a way to detect if we were passed an
480
IPv4 address here. Now we assume an IPv6 address. */
481
ret = inet_pton(AF_INET6, ip, &to.in6.sin6_addr);
347
memset(&to,0,sizeof(to));
348
to.sin6_family = AF_INET6;
349
ret = inet_pton(AF_INET6, ip, &ip_addr);
482
350
if (ret < 0 ){
483
351
perror("inet_pton");
484
352
return -1;
485
}
353
}
486
354
if(ret == 0){
487
355
fprintf(stderr, "Bad address: %s\n", ip);
488
356
return -1;
489
357
}
490
to.in6.sin6_port = htons(port); /* Spurious warning */
491
492
to.in6.sin6_scope_id = (uint32_t)if_index;
493
358
to.sin6_port = htons(port);
359
to.sin6_scope_id = if_nametoindex(interface);
360
494
361
if(debug){
495
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
496
port);
497
char addrstr[INET6_ADDRSTRLEN] = "";
498
if(inet_ntop(to.in6.sin6_family, &(to.in6.sin6_addr), addrstr,
499
sizeof(addrstr)) == NULL){
500
perror("inet_ntop");
501
} else {
502
if(strcmp(addrstr, ip) != 0){
503
fprintf(stderr, "Canonical address form: %s\n", addrstr);
504
}
505
}
362
fprintf(stderr, "Connection to: %s\n", ip);
506
363
}
507
364
508
ret = connect(tcp_sd, &to.in, sizeof(to));
365
ret = connect(tcp_sd, (struct sockaddr *) &to, sizeof(to));
509
366
if (ret < 0){
510
367
perror("connect");
511
368
return -1;
512
369
}
370
371
ret = initgnutls (&es);
372
if (ret != 0){
373
retval = -1;
374
return -1;
375
}
376
377
378
gnutls_transport_set_ptr (es.session, (gnutls_transport_ptr_t) tcp_sd);
513
379
514
const char *out = mandos_protocol_version;
515
written = 0;
516
while (true){
517
size_t out_size = strlen(out);
518
ret = TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
519
out_size - written));
520
if (ret == -1){
521
perror("write");
522
retval = -1;
523
goto mandos_end;
524
}
525
written += (size_t)ret;
526
if(written < out_size){
527
continue;
528
} else {
529
if (out == mandos_protocol_version){
530
written = 0;
531
out = "\r\n";
532
} else {
533
break;
534
}
535
}
536
}
537
538
380
if(debug){
539
fprintf(stderr, "Establishing TLS session with %s\n", ip);
381
fprintf(stderr, "Establishing tls session with %s\n", ip);
540
382
}
541
542
gnutls_transport_set_ptr (session, (gnutls_transport_ptr_t) tcp_sd);
543
383
544
do{
545
ret = gnutls_handshake (session);
546
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
384
385
ret = gnutls_handshake (es.session);
547
386
548
387
if (ret != GNUTLS_E_SUCCESS){
549
if(debug){
550
fprintf(stderr, "*** GnuTLS Handshake failed ***\n");
551
gnutls_perror (ret);
552
}
388
fprintf(stderr, "\n*** Handshake failed ***\n");
389
gnutls_perror (ret);
553
390
retval = -1;
554
goto mandos_end;
391
goto exit;
555
392
}
556
557
/* Read OpenPGP packet that contains the wanted password */
558
393
394
//Retrieve gpg packet that contains the wanted password
395
559
396
if(debug){
560
fprintf(stderr, "Retrieving pgp encrypted password from %s\n",
561
ip);
397
fprintf(stderr, "Retrieving pgp encrypted password from %s\n", ip);
562
398
}
563
399
564
400
while(true){
565
buffer_capacity = adjustbuffer(&buffer, buffer_length,
566
buffer_capacity);
567
if (buffer_capacity == 0){
568
perror("adjustbuffer");
569
retval = -1;
570
goto mandos_end;
401
if (buffer_length + BUFFER_SIZE > buffer_capacity){
402
buffer = realloc(buffer, buffer_capacity + BUFFER_SIZE);
403
if (buffer == NULL){
404
perror("realloc");
405
goto exit;
406
}
407
buffer_capacity += BUFFER_SIZE;
571
408
}
572
409
573
ret = gnutls_record_recv(session, buffer+buffer_length,
574
BUFFER_SIZE);
410
ret = gnutls_record_recv
411
(es.session, buffer+buffer_length, BUFFER_SIZE);
575
412
if (ret == 0){
576
413
break;
577
414
}
581
418
case GNUTLS_E_AGAIN:
582
419
break;
583
420
case GNUTLS_E_REHANDSHAKE:
584
do{
585
ret = gnutls_handshake (session);
586
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
421
ret = gnutls_handshake (es.session);
587
422
if (ret < 0){
588
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
423
fprintf(stderr, "\n*** Handshake failed ***\n");
589
424
gnutls_perror (ret);
590
425
retval = -1;
591
goto mandos_end;
426
goto exit;
592
427
}
593
428
break;
594
429
default:
595
fprintf(stderr, "Unknown error while reading data from"
596
" encrypted session with Mandos server\n");
430
fprintf(stderr, "Unknown error while reading data from encrypted session with mandos server\n");
597
431
retval = -1;
598
gnutls_bye (session, GNUTLS_SHUT_RDWR);
599
goto mandos_end;
432
gnutls_bye (es.session, GNUTLS_SHUT_RDWR);
433
goto exit;
600
434
}
601
435
} else {
602
buffer_length += (size_t) ret;
436
buffer_length += ret;
603
437
}
604
438
}
605
439
606
if(debug){
607
fprintf(stderr, "Closing TLS session\n");
608
}
609
610
gnutls_bye (session, GNUTLS_SHUT_RDWR);
611
612
440
if (buffer_length > 0){
613
decrypted_buffer_size = pgp_packet_decrypt(buffer,
614
buffer_length,
615
&decrypted_buffer,
616
keydir);
617
if (decrypted_buffer_size >= 0){
618
written = 0;
619
while(written < (size_t) decrypted_buffer_size){
620
ret = (int)fwrite (decrypted_buffer + written, 1,
621
(size_t)decrypted_buffer_size - written,
622
stdout);
623
if(ret == 0 and ferror(stdout)){
624
if(debug){
625
fprintf(stderr, "Error writing encrypted data: %s\n",
626
strerror(errno));
627
}
628
retval = -1;
629
break;
630
}
631
written += (size_t)ret;
632
}
441
if ((decrypted_buffer_size = gpg_packet_decrypt(buffer, buffer_length, &decrypted_buffer, CERT_ROOT)) >= 0){
442
fwrite (decrypted_buffer, 1, decrypted_buffer_size, stdout);
633
443
free(decrypted_buffer);
634
444
} else {
635
445
retval = -1;
636
446
}
637
447
}
638
639
/* Shutdown procedure */
640
641
mandos_end:
448
449
//shutdown procedure
450
451
if(debug){
452
fprintf(stderr, "Closing tls session\n");
453
}
454
642
455
free(buffer);
456
gnutls_bye (es.session, GNUTLS_SHUT_RDWR);
457
exit:
643
458
close(tcp_sd);
644
gnutls_deinit (session);
459
gnutls_deinit (es.session);
460
gnutls_certificate_free_credentials (es.cred);
461
gnutls_global_deinit ();
645
462
return retval;
646
463
}
647
464
648
static void resolve_callback(AvahiSServiceResolver *r,
649
AvahiIfIndex interface,
650
AVAHI_GCC_UNUSED AvahiProtocol protocol,
651
AvahiResolverEvent event,
652
const char *name,
653
const char *type,
654
const char *domain,
655
const char *host_name,
656
const AvahiAddress *address,
657
uint16_t port,
658
AVAHI_GCC_UNUSED AvahiStringList *txt,
659
AVAHI_GCC_UNUSED AvahiLookupResultFlags
660
flags,
661
void* userdata) {
662
mandos_context *mc = userdata;
663
assert(r); /* Spurious warning */
664
665
/* Called whenever a service has been resolved successfully or
666
timed out */
667
668
switch (event) {
669
default:
670
case AVAHI_RESOLVER_FAILURE:
671
fprintf(stderr, "(Avahi Resolver) Failed to resolve service '%s'"
672
" of type '%s' in domain '%s': %s\n", name, type, domain,
673
avahi_strerror(avahi_server_errno(mc->server)));
674
break;
675
676
case AVAHI_RESOLVER_FOUND:
677
{
678
char ip[AVAHI_ADDRESS_STR_MAX];
679
avahi_address_snprint(ip, sizeof(ip), address);
680
if(debug){
681
fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %"
682
PRIu16 ") on port %d\n", name, host_name, ip,
683
interface, port);
684
}
685
int ret = start_mandos_communication(ip, port, interface, mc);
686
if (ret == 0){
687
exit(EXIT_SUCCESS);
688
}
689
}
690
}
691
avahi_s_service_resolver_free(r);
692
}
693
694
static void browse_callback( AvahiSServiceBrowser *b,
695
AvahiIfIndex interface,
696
AvahiProtocol protocol,
697
AvahiBrowserEvent event,
698
const char *name,
699
const char *type,
700
const char *domain,
701
AVAHI_GCC_UNUSED AvahiLookupResultFlags
702
flags,
703
void* userdata) {
704
mandos_context *mc = userdata;
705
assert(b); /* Spurious warning */
706
707
/* Called whenever a new services becomes available on the LAN or
708
is removed from the LAN */
709
710
switch (event) {
711
default:
712
case AVAHI_BROWSER_FAILURE:
713
714
fprintf(stderr, "(Avahi browser) %s\n",
715
avahi_strerror(avahi_server_errno(mc->server)));
716
avahi_simple_poll_quit(mc->simple_poll);
717
return;
718
719
case AVAHI_BROWSER_NEW:
720
/* We ignore the returned Avahi resolver object. In the callback
721
function we free it. If the Avahi server is terminated before
722
the callback function is called the Avahi server will free the
723
resolver for us. */
724
725
if (!(avahi_s_service_resolver_new(mc->server, interface,
726
protocol, name, type, domain,
727
AVAHI_PROTO_INET6, 0,
728
resolve_callback, mc)))
729
fprintf(stderr, "Avahi: Failed to resolve service '%s': %s\n",
730
name, avahi_strerror(avahi_server_errno(mc->server)));
731
break;
732
733
case AVAHI_BROWSER_REMOVE:
734
break;
735
736
case AVAHI_BROWSER_ALL_FOR_NOW:
737
case AVAHI_BROWSER_CACHE_EXHAUSTED:
738
if(debug){
739
fprintf(stderr, "No Mandos server found, still searching...\n");
740
}
741
break;
742
}
743
}
744
745
/* Combines file name and path and returns the malloced new
746
string. some sane checks could/should be added */
747
static const char *combinepath(const char *first, const char *second){
748
size_t f_len = strlen(first);
749
size_t s_len = strlen(second);
750
char *tmp = malloc(f_len + s_len + 2);
751
if (tmp == NULL){
752
return NULL;
753
}
754
if(f_len > 0){
755
memcpy(tmp, first, f_len); /* Spurious warning */
756
}
757
tmp[f_len] = '/';
758
if(s_len > 0){
759
memcpy(tmp + f_len + 1, second, s_len); /* Spurious warning */
760
}
761
tmp[f_len + 1 + s_len] = '\0';
762
return tmp;
763
}
764
765
766
int main(int argc, char *argv[]){
465
static AvahiSimplePoll *simple_poll = NULL;
466
static AvahiServer *server = NULL;
467
468
static void resolve_callback(
469
AvahiSServiceResolver *r,
470
AVAHI_GCC_UNUSED AvahiIfIndex interface,
471
AVAHI_GCC_UNUSED AvahiProtocol protocol,
472
AvahiResolverEvent event,
473
const char *name,
474
const char *type,
475
const char *domain,
476
const char *host_name,
477
const AvahiAddress *address,
478
uint16_t port,
479
AvahiStringList *txt,
480
AvahiLookupResultFlags flags,
481
AVAHI_GCC_UNUSED void* userdata) {
482
483
assert(r);
484
485
/* Called whenever a service has been resolved successfully or timed out */
486
487
switch (event) {
488
case AVAHI_RESOLVER_FAILURE:
489
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)));
490
break;
491
492
case AVAHI_RESOLVER_FOUND: {
493
char ip[AVAHI_ADDRESS_STR_MAX];
494
avahi_address_snprint(ip, sizeof(ip), address);
495
if(debug){
496
fprintf(stderr, "Mandos server found at %s on port %d\n", ip, port);
497
}
498
int ret = start_mandos_communcation(ip, port);
499
if (ret == 0){
500
exit(EXIT_SUCCESS);
501
} else {
502
exit(EXIT_FAILURE);
503
}
504
}
505
}
506
avahi_s_service_resolver_free(r);
507
}
508
509
static void browse_callback(
510
AvahiSServiceBrowser *b,
511
AvahiIfIndex interface,
512
AvahiProtocol protocol,
513
AvahiBrowserEvent event,
514
const char *name,
515
const char *type,
516
const char *domain,
517
AVAHI_GCC_UNUSED AvahiLookupResultFlags flags,
518
void* userdata) {
519
520
AvahiServer *s = userdata;
521
assert(b);
522
523
/* Called whenever a new services becomes available on the LAN or is removed from the LAN */
524
525
switch (event) {
526
527
case AVAHI_BROWSER_FAILURE:
528
529
fprintf(stderr, "(Browser) %s\n", avahi_strerror(avahi_server_errno(server)));
530
avahi_simple_poll_quit(simple_poll);
531
return;
532
533
case AVAHI_BROWSER_NEW:
534
/* We ignore the returned resolver object. In the callback
535
function we free it. If the server is terminated before
536
the callback function is called the server will free
537
the resolver for us. */
538
539
if (!(avahi_s_service_resolver_new(s, interface, protocol, name, type, domain, AVAHI_PROTO_INET6, 0, resolve_callback, s)))
540
fprintf(stderr, "Failed to resolve service '%s': %s\n", name, avahi_strerror(avahi_server_errno(s)));
541
542
break;
543
544
case AVAHI_BROWSER_REMOVE:
545
break;
546
547
case AVAHI_BROWSER_ALL_FOR_NOW:
548
case AVAHI_BROWSER_CACHE_EXHAUSTED:
549
break;
550
}
551
}
552
553
int main(AVAHI_GCC_UNUSED int argc, AVAHI_GCC_UNUSED char*argv[]) {
554
AvahiServerConfig config;
767
555
AvahiSServiceBrowser *sb = NULL;
556
const char db[] = "--debug";
768
557
int error;
769
int ret;
770
int exitcode = EXIT_SUCCESS;
771
const char *interface = "eth0";
772
struct ifreq network;
773
int sd;
774
uid_t uid;
775
gid_t gid;
776
char *connect_to = NULL;
777
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
778
const char *pubkeyfile = "pubkey.txt";
779
const char *seckeyfile = "seckey.txt";
780
mandos_context mc = { .simple_poll = NULL, .server = NULL,
781
.dh_bits = 1024, .priority = "SECURE256"};
782
bool gnutls_initalized = false;
558
int ret = 1;
559
int returncode = EXIT_SUCCESS;
560
char *basename = rindex(argv[0], '/');
561
if(basename == NULL){
562
basename = argv[0];
563
} else {
564
basename++;
565
}
783
566
784
{
785
struct argp_option options[] = {
786
{ .name = "debug", .key = 128,
787
.doc = "Debug mode", .group = 3 },
788
{ .name = "connect", .key = 'c',
789
.arg = "IP",
790
.doc = "Connect directly to a sepcified mandos server",
791
.group = 1 },
792
{ .name = "interface", .key = 'i',
793
.arg = "INTERFACE",
794
.doc = "Interface that Avahi will conntect through",
795
.group = 1 },
796
{ .name = "keydir", .key = 'd',
797
.arg = "KEYDIR",
798
.doc = "Directory where the openpgp keyring is",
799
.group = 1 },
800
{ .name = "seckey", .key = 's',
801
.arg = "SECKEY",
802
.doc = "Secret openpgp key for gnutls authentication",
803
.group = 1 },
804
{ .name = "pubkey", .key = 'p',
805
.arg = "PUBKEY",
806
.doc = "Public openpgp key for gnutls authentication",
807
.group = 2 },
808
{ .name = "dh-bits", .key = 129,
809
.arg = "BITS",
810
.doc = "dh-bits to use in gnutls communication",
811
.group = 2 },
812
{ .name = "priority", .key = 130,
813
.arg = "PRIORITY",
814
.doc = "GNUTLS priority", .group = 1 },
815
{ .name = NULL }
816
};
567
char *program_name = malloc(strlen(basename) + sizeof(db));
817
568
818
819
error_t parse_opt (int key, char *arg,
820
struct argp_state *state) {
821
/* Get the INPUT argument from `argp_parse', which we know is
822
a pointer to our plugin list pointer. */
823
switch (key) {
824
case 128:
825
debug = true;
826
break;
827
case 'c':
828
connect_to = arg;
829
break;
830
case 'i':
831
interface = arg;
832
break;
833
case 'd':
834
keydir = arg;
835
break;
836
case 's':
837
seckeyfile = arg;
838
break;
839
case 'p':
840
pubkeyfile = arg;
841
break;
842
case 129:
843
errno = 0;
844
mc.dh_bits = (unsigned int) strtol(arg, NULL, 10);
845
if (errno){
846
perror("strtol");
847
exit(EXIT_FAILURE);
569
if (program_name == NULL){
570
perror("argv[0]");
571
return EXIT_FAILURE;
572
}
573
574
program_name[0] = '\0';
575
576
for (int i = 1; i < argc; i++){
577
if (not strncmp(argv[i], db, 5)){
578
strcat(strcat(strcat(program_name, db ), "="), basename);
579
if(not strcmp(argv[i], db) or not strcmp(argv[i], program_name)){
580
debug = true;
848
581
}
849
break;
850
case 130:
851
mc.priority = arg;
852
break;
853
case ARGP_KEY_ARG:
854
argp_usage (state);
855
break;
856
case ARGP_KEY_END:
857
break;
858
default:
859
return ARGP_ERR_UNKNOWN;
860
}
861
return 0;
862
}
863
864
struct argp argp = { .options = options, .parser = parse_opt,
865
.args_doc = "",
866
.doc = "Mandos client -- Get and decrypt"
867
" passwords from mandos server" };
868
ret = argp_parse (&argp, argc, argv, 0, 0, NULL);
869
if (ret == ARGP_ERR_UNKNOWN){
870
fprintf(stderr, "Unkown error while parsing arguments\n");
871
exitcode = EXIT_FAILURE;
872
goto end;
873
}
874
}
875
876
pubkeyfile = combinepath(keydir, pubkeyfile);
877
if (pubkeyfile == NULL){
878
perror("combinepath");
879
exitcode = EXIT_FAILURE;
880
goto end;
881
}
882
883
seckeyfile = combinepath(keydir, seckeyfile);
884
if (seckeyfile == NULL){
885
perror("combinepath");
886
goto end;
887
}
888
889
ret = init_gnutls_global(&mc, pubkeyfile, seckeyfile);
890
if (ret == -1){
891
fprintf(stderr, "init_gnutls_global\n");
892
goto end;
893
} else {
894
gnutls_initalized = true;
895
}
896
897
uid = getuid();
898
gid = getgid();
899
900
ret = setuid(uid);
901
if (ret == -1){
902
perror("setuid");
903
}
904
905
setgid(gid);
906
if (ret == -1){
907
perror("setgid");
908
}
909
910
if_index = (AvahiIfIndex) if_nametoindex(interface);
911
if(if_index == 0){
912
fprintf(stderr, "No such interface: \"%s\"\n", interface);
913
exit(EXIT_FAILURE);
914
}
915
916
if(connect_to != NULL){
917
/* Connect directly, do not use Zeroconf */
918
/* (Mainly meant for debugging) */
919
char *address = strrchr(connect_to, ':');
920
if(address == NULL){
921
fprintf(stderr, "No colon in address\n");
922
exitcode = EXIT_FAILURE;
923
goto end;
924
}
925
errno = 0;
926
uint16_t port = (uint16_t) strtol(address+1, NULL, 10);
927
if(errno){
928
perror("Bad port number");
929
exitcode = EXIT_FAILURE;
930
goto end;
931
}
932
*address = '\0';
933
address = connect_to;
934
ret = start_mandos_communication(address, port, if_index, &mc);
935
if(ret < 0){
936
exitcode = EXIT_FAILURE;
937
} else {
938
exitcode = EXIT_SUCCESS;
939
}
940
goto end;
941
}
942
943
/* If the interface is down, bring it up */
944
{
945
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
946
if(sd < 0) {
947
perror("socket");
948
exitcode = EXIT_FAILURE;
949
goto end;
950
}
951
strcpy(network.ifr_name, interface); /* Spurious warning */
952
ret = ioctl(sd, SIOCGIFFLAGS, &network);
953
if(ret == -1){
954
perror("ioctl SIOCGIFFLAGS");
955
exitcode = EXIT_FAILURE;
956
goto end;
957
}
958
if((network.ifr_flags & IFF_UP) == 0){
959
network.ifr_flags |= IFF_UP;
960
ret = ioctl(sd, SIOCSIFFLAGS, &network);
961
if(ret == -1){
962
perror("ioctl SIOCSIFFLAGS");
963
exitcode = EXIT_FAILURE;
964
goto end;
965
}
966
}
967
close(sd);
968
}
969
582
}
583
}
584
free(program_name);
585
970
586
if (not debug){
971
587
avahi_set_log_function(empty_log);
972
588
}
973
589
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;
590
/* Initialize the psuedo-RNG */
591
srand(time(NULL));
592
593
/* Allocate main loop object */
594
if (!(simple_poll = avahi_simple_poll_new())) {
595
fprintf(stderr, "Failed to create simple poll object.\n");
596
597
goto exit;
598
}
599
600
/* Do not publish any local records */
601
avahi_server_config_init(&config);
602
config.publish_hinfo = 0;
603
config.publish_addresses = 0;
604
config.publish_workstation = 0;
605
config.publish_domain = 0;
606
607
/* Allocate a new server */
608
server = avahi_server_new(avahi_simple_poll_get(simple_poll), &config, NULL, NULL, &error);
609
610
/* Free the configuration data */
611
avahi_server_config_free(&config);
612
613
/* Check if creating the server object succeeded */
614
if (!server) {
615
fprintf(stderr, "Failed to create server: %s\n", avahi_strerror(error));
616
returncode = EXIT_FAILURE;
617
goto exit;
618
}
619
620
/* Create the service browser */
621
if (!(sb = avahi_s_service_browser_new(server, if_nametoindex("eth0"), AVAHI_PROTO_INET6, "_mandos._tcp", NULL, 0, browse_callback, server))) {
622
fprintf(stderr, "Failed to create service browser: %s\n", avahi_strerror(avahi_server_errno(server)));
623
returncode = EXIT_FAILURE;
624
goto exit;
1022
625
}
1023
626
1024
627
/* Run the main loop */
1025
628
1026
629
if (debug){
1027
fprintf(stderr, "Starting Avahi loop search\n");
630
fprintf(stderr, "Starting avahi loop search\n");
1028
631
}
1029
632
1030
avahi_simple_poll_loop(mc.simple_poll);
633
avahi_simple_poll_loop(simple_poll);
1031
634
1032
end:
635
exit:
1033
636
1034
637
if (debug){
1035
638
fprintf(stderr, "%s exiting\n", argv[0]);
1036
639
}
1037
640
1038
641
/* Cleanup things */
1039
if (sb != NULL)
642
if (sb)
1040
643
avahi_s_service_browser_free(sb);
1041
644
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;
645
if (server)
646
avahi_server_free(server);
647
648
if (simple_poll)
649
avahi_simple_poll_free(simple_poll);
650
651
return ret;
1056
652
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0