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- Committer: Teddy Hogeborn
- Date: 2008-07-21 02:35:05 UTC
- Revision ID: teddy@fukt.bsnet.se-20080721023505-x7pjntkgur2h5jkg
* plugins.d/mandosclient.c (start_mandos_communcation): Renamed to
"start_mandos_communication"
"start_mandos_communication"
- files added:
- ca.pem
- files removed:
- .bzrignore
- files renamed:
- clients.conf => mandos-clients.conf
- plugin-runner.c => plugbasedclient.c
- plugins.d/mandos-client.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(), asprintf() */
36
37
#include <stdio.h> /* fprintf(), stderr, fwrite(),
38
stdout, 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(), asprintf(), 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, open(), opendir(), DIR */
51
#include <sys/stat.h> /* open() */
52
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
53
struct in6_addr, inet_pton(),
54
connect() */
55
#include <fcntl.h> /* open() */
56
#include <dirent.h> /* opendir(), struct dirent, readdir() */
57
#include <inttypes.h> /* PRIu16 */
58
#include <assert.h> /* assert() */
59
#include <errno.h> /* perror(), errno */
60
#include <time.h> /* time() */
61
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
62
SIOCSIFFLAGS, if_indextoname(),
63
if_nametoindex(), IF_NAMESIZE */
64
#include <netinet/in.h>
65
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
66
getuid(), getgid(), setuid(),
67
setgid() */
68
#include <arpa/inet.h> /* inet_pton(), htons */
69
#include <iso646.h> /* not, and */
70
#include <argp.h> /* struct argp_option, error_t, struct
71
argp_state, struct argp,
72
argp_parse(), ARGP_KEY_ARG,
73
ARGP_KEY_END, ARGP_ERR_UNKNOWN */
74
75
/* Avahi */
76
/* All Avahi types, constants and functions
77
Avahi*, avahi_*,
78
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
79
29
#include <avahi-core/core.h>
80
30
#include <avahi-core/lookup.h>
81
31
#include <avahi-core/log.h>
83
33
#include <avahi-common/malloc.h>
84
34
#include <avahi-common/error.h>
85
35
86
/* GnuTLS */
87
#include <gnutls/gnutls.h> /* All GnuTLS types, constants and
88
functions:
89
gnutls_*
90
init_gnutls_session(),
91
GNUTLS_* */
92
#include <gnutls/openpgp.h> /* gnutls_certificate_set_openpgp_key_file(),
93
GNUTLS_OPENPGP_FMT_BASE64 */
94
95
/* GPGME */
96
#include <gpgme.h> /* All GPGME types, constants and
97
functions:
98
gpgme_*
99
GPGME_PROTOCOL_OpenPGP,
100
GPG_ERR_NO_* */
101
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"
102
59
#define BUFFER_SIZE 256
103
104
/*
105
#define PATHDIR "/conf/conf.d/mandos"
106
*/
107
108
#define PATHDIR "/conf/conf.d/mandos"
109
#define SECKEY "seckey.txt"
110
#define PUBKEY "pubkey.txt"
60
#define DH_BITS 1024
111
61
112
62
bool debug = false;
113
static const char mandos_protocol_version[] = "1";
114
const char *argp_program_version = "mandos-client 1.0";
115
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
116
63
117
/* Used for passing in values through the Avahi callback functions */
118
64
typedef struct {
119
AvahiSimplePoll *simple_poll;
120
AvahiServer *server;
65
gnutls_session_t session;
121
66
gnutls_certificate_credentials_t cred;
122
unsigned int dh_bits;
123
67
gnutls_dh_params_t dh_params;
124
const char *priority;
68
} encrypted_session;
69
70
71
ssize_t gpg_packet_decrypt (char *packet, size_t packet_size, char **new_packet, char *homedir){
72
gpgme_data_t dh_crypto, dh_plain;
125
73
gpgme_ctx_t ctx;
126
} mandos_context;
127
128
/*
129
* Make room in "buffer" for at least BUFFER_SIZE additional bytes.
130
* "buffer_capacity" is how much is currently allocated,
131
* "buffer_length" is how much is already used.
132
*/
133
size_t adjustbuffer(char **buffer, size_t buffer_length,
134
size_t buffer_capacity){
135
if (buffer_length + BUFFER_SIZE > buffer_capacity){
136
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
137
if (buffer == NULL){
138
return 0;
139
}
140
buffer_capacity += BUFFER_SIZE;
141
}
142
return buffer_capacity;
143
}
144
145
/*
146
* Initialize GPGME.
147
*/
148
static bool init_gpgme(mandos_context *mc, const char *seckey,
149
const char *pubkey, const char *tempdir){
150
int ret;
151
74
gpgme_error_t rc;
75
ssize_t ret;
76
size_t new_packet_capacity = 0;
77
size_t new_packet_length = 0;
152
78
gpgme_engine_info_t engine_info;
153
154
155
/*
156
* Helper function to insert pub and seckey to the enigne keyring.
157
*/
158
bool import_key(const char *filename){
159
int fd;
160
gpgme_data_t pgp_data;
161
162
fd = TEMP_FAILURE_RETRY(open(filename, O_RDONLY));
163
if(fd == -1){
164
perror("open");
165
return false;
166
}
167
168
rc = gpgme_data_new_from_fd(&pgp_data, fd);
169
if (rc != GPG_ERR_NO_ERROR){
170
fprintf(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
171
gpgme_strsource(rc), gpgme_strerror(rc));
172
return false;
173
}
174
175
rc = gpgme_op_import(mc->ctx, pgp_data);
176
if (rc != GPG_ERR_NO_ERROR){
177
fprintf(stderr, "bad gpgme_op_import: %s: %s\n",
178
gpgme_strsource(rc), gpgme_strerror(rc));
179
return false;
180
}
181
182
ret = TEMP_FAILURE_RETRY(close(fd));
183
if(ret == -1){
184
perror("close");
185
}
186
gpgme_data_release(pgp_data);
187
return true;
188
}
189
79
190
80
if (debug){
191
fprintf(stderr, "Initialize gpgme\n");
81
fprintf(stderr, "Attempting to decrypt password from gpg packet\n");
192
82
}
193
83
194
84
/* Init GPGME */
195
85
gpgme_check_version(NULL);
196
rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
197
if (rc != GPG_ERR_NO_ERROR){
198
fprintf(stderr, "bad gpgme_engine_check_version: %s: %s\n",
199
gpgme_strsource(rc), gpgme_strerror(rc));
200
return false;
201
}
86
gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
202
87
203
/* Set GPGME home directory for the OpenPGP engine only */
88
/* Set GPGME home directory */
204
89
rc = gpgme_get_engine_info (&engine_info);
205
90
if (rc != GPG_ERR_NO_ERROR){
206
91
fprintf(stderr, "bad gpgme_get_engine_info: %s: %s\n",
207
92
gpgme_strsource(rc), gpgme_strerror(rc));
208
return false;
93
return -1;
209
94
}
210
95
while(engine_info != NULL){
211
96
if(engine_info->protocol == GPGME_PROTOCOL_OpenPGP){
212
97
gpgme_set_engine_info(GPGME_PROTOCOL_OpenPGP,
213
engine_info->file_name, tempdir);
98
engine_info->file_name, homedir);
214
99
break;
215
100
}
216
101
engine_info = engine_info->next;
217
102
}
218
103
if(engine_info == NULL){
219
fprintf(stderr, "Could not set GPGME home dir to %s\n", tempdir);
220
return false;
221
}
222
223
/* Create new GPGME "context" */
224
rc = gpgme_new(&(mc->ctx));
225
if (rc != GPG_ERR_NO_ERROR){
226
fprintf(stderr, "bad gpgme_new: %s: %s\n",
227
gpgme_strsource(rc), gpgme_strerror(rc));
228
return false;
229
}
230
231
if (not import_key(pubkey) or not import_key(seckey)){
232
return false;
233
}
234
235
return true;
236
}
237
238
/*
239
* Decrypt OpenPGP data.
240
* Returns -1 on error
241
*/
242
static ssize_t pgp_packet_decrypt (const mandos_context *mc,
243
const char *cryptotext,
244
size_t crypto_size,
245
char **plaintext){
246
gpgme_data_t dh_crypto, dh_plain;
247
gpgme_error_t rc;
248
ssize_t ret;
249
size_t plaintext_capacity = 0;
250
ssize_t plaintext_length = 0;
251
252
if (debug){
253
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
254
}
255
256
/* Create new GPGME data buffer from memory cryptotext */
257
rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,
258
0);
104
fprintf(stderr, "Could not set home dir to %s\n", homedir);
105
return -1;
106
}
107
108
/* Create new GPGME data buffer from packet buffer */
109
rc = gpgme_data_new_from_mem(&dh_crypto, packet, packet_size, 0);
259
110
if (rc != GPG_ERR_NO_ERROR){
260
111
fprintf(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
261
112
gpgme_strsource(rc), gpgme_strerror(rc));
267
118
if (rc != GPG_ERR_NO_ERROR){
268
119
fprintf(stderr, "bad gpgme_data_new: %s: %s\n",
269
120
gpgme_strsource(rc), gpgme_strerror(rc));
270
gpgme_data_release(dh_crypto);
271
return -1;
272
}
273
274
/* Decrypt data from the cryptotext data buffer to the plaintext
275
data buffer */
276
rc = gpgme_op_decrypt(mc->ctx, dh_crypto, dh_plain);
121
return -1;
122
}
123
124
/* Create new GPGME "context" */
125
rc = gpgme_new(&ctx);
126
if (rc != GPG_ERR_NO_ERROR){
127
fprintf(stderr, "bad gpgme_new: %s: %s\n",
128
gpgme_strsource(rc), gpgme_strerror(rc));
129
return -1;
130
}
131
132
/* Decrypt data from the FILE pointer to the plaintext data buffer */
133
rc = gpgme_op_decrypt(ctx, dh_crypto, dh_plain);
277
134
if (rc != GPG_ERR_NO_ERROR){
278
135
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
279
136
gpgme_strsource(rc), gpgme_strerror(rc));
280
plaintext_length = -1;
281
if (debug){
282
gpgme_decrypt_result_t result;
283
result = gpgme_op_decrypt_result(mc->ctx);
284
if (result == NULL){
285
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
286
} else {
287
fprintf(stderr, "Unsupported algorithm: %s\n",
288
result->unsupported_algorithm);
289
fprintf(stderr, "Wrong key usage: %u\n",
290
result->wrong_key_usage);
291
if(result->file_name != NULL){
292
fprintf(stderr, "File name: %s\n", result->file_name);
293
}
294
gpgme_recipient_t recipient;
295
recipient = result->recipients;
296
if(recipient){
297
while(recipient != NULL){
298
fprintf(stderr, "Public key algorithm: %s\n",
299
gpgme_pubkey_algo_name(recipient->pubkey_algo));
300
fprintf(stderr, "Key ID: %s\n", recipient->keyid);
301
fprintf(stderr, "Secret key available: %s\n",
302
recipient->status == GPG_ERR_NO_SECKEY
303
? "No" : "Yes");
304
recipient = recipient->next;
305
}
137
return -1;
138
}
139
140
if(debug){
141
fprintf(stderr, "decryption of gpg packet succeeded\n");
142
}
143
144
if (debug){
145
gpgme_decrypt_result_t result;
146
result = gpgme_op_decrypt_result(ctx);
147
if (result == NULL){
148
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
149
} else {
150
fprintf(stderr, "Unsupported algorithm: %s\n", result->unsupported_algorithm);
151
fprintf(stderr, "Wrong key usage: %d\n", result->wrong_key_usage);
152
if(result->file_name != NULL){
153
fprintf(stderr, "File name: %s\n", result->file_name);
154
}
155
gpgme_recipient_t recipient;
156
recipient = result->recipients;
157
if(recipient){
158
while(recipient != NULL){
159
fprintf(stderr, "Public key algorithm: %s\n",
160
gpgme_pubkey_algo_name(recipient->pubkey_algo));
161
fprintf(stderr, "Key ID: %s\n", recipient->keyid);
162
fprintf(stderr, "Secret key available: %s\n",
163
recipient->status == GPG_ERR_NO_SECKEY ? "No" : "Yes");
164
recipient = recipient->next;
306
165
}
307
166
}
308
167
}
309
goto decrypt_end;
310
168
}
311
169
312
if(debug){
313
fprintf(stderr, "Decryption of OpenPGP data succeeded\n");
314
}
170
/* Delete the GPGME FILE pointer cryptotext data buffer */
171
gpgme_data_release(dh_crypto);
315
172
316
173
/* Seek back to the beginning of the GPGME plaintext data buffer */
317
if (gpgme_data_seek(dh_plain, (off_t) 0, SEEK_SET) == -1){
318
perror("gpgme_data_seek");
319
plaintext_length = -1;
320
goto decrypt_end;
321
}
322
323
*plaintext = NULL;
174
gpgme_data_seek(dh_plain, 0, SEEK_SET);
175
176
*new_packet = 0;
324
177
while(true){
325
plaintext_capacity = adjustbuffer(plaintext,
326
(size_t)plaintext_length,
327
plaintext_capacity);
328
if (plaintext_capacity == 0){
329
perror("adjustbuffer");
330
plaintext_length = -1;
331
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;
332
185
}
333
186
334
ret = gpgme_data_read(dh_plain, *plaintext + plaintext_length,
335
BUFFER_SIZE);
187
ret = gpgme_data_read(dh_plain, *new_packet + new_packet_length, BUFFER_SIZE);
336
188
/* Print the data, if any */
337
189
if (ret == 0){
338
/* EOF */
190
/* If password is empty, then a incorrect error will be printed */
339
191
break;
340
192
}
341
193
if(ret < 0){
342
194
perror("gpgme_data_read");
343
plaintext_length = -1;
344
goto decrypt_end;
195
return -1;
345
196
}
346
plaintext_length += ret;
197
new_packet_length += ret;
347
198
}
348
199
349
200
if(debug){
350
fprintf(stderr, "Decrypted password is: ");
351
for(ssize_t i = 0; i < plaintext_length; i++){
352
fprintf(stderr, "%02hhX ", (*plaintext)[i]);
353
}
354
fprintf(stderr, "\n");
201
fprintf(stderr, "decrypted password is: %s\n", *new_packet);
355
202
}
356
357
decrypt_end:
358
359
/* Delete the GPGME cryptotext data buffer */
360
gpgme_data_release(dh_crypto);
361
362
/* Delete the GPGME plaintext data buffer */
203
204
/* Delete the GPGME plaintext data buffer */
363
205
gpgme_data_release(dh_plain);
364
return plaintext_length;
206
return new_packet_length;
365
207
}
366
208
367
209
static const char * safer_gnutls_strerror (int value) {
368
const char *ret = gnutls_strerror (value); /* Spurious warning */
210
const char *ret = gnutls_strerror (value);
369
211
if (ret == NULL)
370
212
ret = "(unknown)";
371
213
return ret;
372
214
}
373
215
374
/* GnuTLS log function callback */
375
static void debuggnutls(__attribute__((unused)) int level,
376
const char* string){
377
fprintf(stderr, "GnuTLS: %s", string);
216
void debuggnutls(int level, const char* string){
217
fprintf(stderr, "%s", string);
378
218
}
379
219
380
static int init_gnutls_global(mandos_context *mc,
381
const char *pubkeyfilename,
382
const char *seckeyfilename){
220
int initgnutls(encrypted_session *es){
221
const char *err;
383
222
int ret;
384
223
385
224
if(debug){
386
fprintf(stderr, "Initializing GnuTLS\n");
225
fprintf(stderr, "Initializing gnutls\n");
387
226
}
227
388
228
389
ret = gnutls_global_init();
390
if (ret != GNUTLS_E_SUCCESS) {
391
fprintf (stderr, "GnuTLS global_init: %s\n",
392
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));
393
232
return -1;
394
233
}
395
234
396
235
if (debug){
397
/* "Use a log level over 10 to enable all debugging options."
398
* - GnuTLS manual
399
*/
400
236
gnutls_global_set_log_level(11);
401
237
gnutls_global_set_log_function(debuggnutls);
402
238
}
403
239
404
/* OpenPGP credentials */
405
gnutls_certificate_allocate_credentials(&mc->cred);
406
if (ret != GNUTLS_E_SUCCESS){
407
fprintf (stderr, "GnuTLS memory error: %s\n", /* Spurious
408
warning */
409
safer_gnutls_strerror(ret));
410
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));
411
245
return -1;
412
246
}
413
247
414
248
if(debug){
415
fprintf(stderr, "Attempting to use OpenPGP public key %s and"
416
" secret key %s as GnuTLS credentials\n", pubkeyfilename,
417
seckeyfilename);
249
fprintf(stderr, "Attempting to use openpgp certificate %s"
250
" and keyfile %s as gnutls credentials\n", CERTFILE, KEYFILE);
418
251
}
419
252
420
253
ret = gnutls_certificate_set_openpgp_key_file
421
(mc->cred, pubkeyfilename, seckeyfilename,
422
GNUTLS_OPENPGP_FMT_BASE64);
423
if (ret != GNUTLS_E_SUCCESS) {
424
fprintf(stderr,
425
"Error[%d] while reading the OpenPGP key pair ('%s',"
426
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
427
fprintf(stderr, "The GnuTLS error is: %s\n",
428
safer_gnutls_strerror(ret));
429
goto globalfail;
430
}
431
432
/* GnuTLS server initialization */
433
ret = gnutls_dh_params_init(&mc->dh_params);
434
if (ret != GNUTLS_E_SUCCESS) {
435
fprintf (stderr, "Error in GnuTLS DH parameter initialization:"
436
" %s\n", safer_gnutls_strerror(ret));
437
goto globalfail;
438
}
439
ret = gnutls_dh_params_generate2(mc->dh_params, mc->dh_bits);
440
if (ret != GNUTLS_E_SUCCESS) {
441
fprintf (stderr, "Error in GnuTLS prime generation: %s\n",
442
safer_gnutls_strerror(ret));
443
goto globalfail;
444
}
445
446
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
447
448
return 0;
449
450
globalfail:
451
452
gnutls_certificate_free_credentials(mc->cred);
453
gnutls_global_deinit();
454
gnutls_dh_params_deinit(mc->dh_params);
455
return -1;
456
}
457
458
static int init_gnutls_session(mandos_context *mc,
459
gnutls_session_t *session){
460
int ret;
461
/* GnuTLS session creation */
462
ret = gnutls_init(session, GNUTLS_SERVER);
463
if (ret != GNUTLS_E_SUCCESS){
464
fprintf(stderr, "Error in GnuTLS session initialization: %s\n",
465
safer_gnutls_strerror(ret));
466
}
467
468
{
469
const char *err;
470
ret = gnutls_priority_set_direct(*session, mc->priority, &err);
471
if (ret != GNUTLS_E_SUCCESS) {
472
fprintf(stderr, "Syntax error at: %s\n", err);
473
fprintf(stderr, "GnuTLS error: %s\n",
474
safer_gnutls_strerror(ret));
475
gnutls_deinit (*session);
476
return -1;
477
}
478
}
479
480
ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,
481
mc->cred);
482
if (ret != GNUTLS_E_SUCCESS) {
483
fprintf(stderr, "Error setting GnuTLS credentials: %s\n",
484
safer_gnutls_strerror(ret));
485
gnutls_deinit (*session);
486
return -1;
487
}
488
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
489
304
/* ignore client certificate if any. */
490
gnutls_certificate_server_set_request (*session,
491
GNUTLS_CERT_IGNORE);
305
gnutls_certificate_server_set_request (es->session, GNUTLS_CERT_IGNORE);
492
306
493
gnutls_dh_set_prime_bits (*session, mc->dh_bits);
307
gnutls_dh_set_prime_bits (es->session, DH_BITS);
494
308
495
309
return 0;
496
310
}
497
311
498
/* Avahi log function callback */
499
static void empty_log(__attribute__((unused)) AvahiLogLevel level,
500
__attribute__((unused)) const char *txt){}
312
void empty_log(AvahiLogLevel level, const char *txt){}
501
313
502
/* Called when a Mandos server is found */
503
static int start_mandos_communication(const char *ip, uint16_t port,
504
AvahiIfIndex if_index,
505
mandos_context *mc){
314
int start_mandos_communication(char *ip, uint16_t port){
506
315
int ret, tcp_sd;
507
union { struct sockaddr in; struct sockaddr_in6 in6; } to;
316
struct sockaddr_in6 to;
317
encrypted_session es;
508
318
char *buffer = NULL;
509
319
char *decrypted_buffer;
510
320
size_t buffer_length = 0;
511
321
size_t buffer_capacity = 0;
512
322
ssize_t decrypted_buffer_size;
513
size_t written;
514
323
int retval = 0;
515
char interface[IF_NAMESIZE];
516
gnutls_session_t session;
517
518
ret = init_gnutls_session (mc, &session);
519
if (ret != 0){
520
return -1;
521
}
522
324
const char interface[] = "eth0";
325
523
326
if(debug){
524
fprintf(stderr, "Setting up a tcp connection to %s, port %" PRIu16
525
"\n", ip, port);
327
fprintf(stderr, "Setting up a tcp connection to %s\n", ip);
526
328
}
527
329
528
330
tcp_sd = socket(PF_INET6, SOCK_STREAM, 0);
530
332
perror("socket");
531
333
return -1;
532
334
}
533
335
534
336
if(debug){
535
if(if_indextoname((unsigned int)if_index, interface) == NULL){
536
perror("if_indextoname");
537
return -1;
538
}
539
337
fprintf(stderr, "Binding to interface %s\n", interface);
540
338
}
339
340
ret = setsockopt(tcp_sd, SOL_SOCKET, SO_BINDTODEVICE, interface, 5);
341
if(tcp_sd < 0) {
342
perror("setsockopt bindtodevice");
343
return -1;
344
}
541
345
542
memset(&to, 0, sizeof(to));
543
to.in6.sin6_family = AF_INET6;
544
/* It would be nice to have a way to detect if we were passed an
545
IPv4 address here. Now we assume an IPv6 address. */
546
ret = inet_pton(AF_INET6, ip, &to.in6.sin6_addr);
346
memset(&to,0,sizeof(to));
347
to.sin6_family = AF_INET6;
348
ret = inet_pton(AF_INET6, ip, &to.sin6_addr);
547
349
if (ret < 0 ){
548
350
perror("inet_pton");
549
351
return -1;
550
}
352
}
551
353
if(ret == 0){
552
354
fprintf(stderr, "Bad address: %s\n", ip);
553
355
return -1;
554
356
}
555
to.in6.sin6_port = htons(port); /* Spurious warning */
556
557
to.in6.sin6_scope_id = (uint32_t)if_index;
558
357
to.sin6_port = htons(port);
358
to.sin6_scope_id = if_nametoindex(interface);
359
559
360
if(debug){
560
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
561
port);
562
char addrstr[INET6_ADDRSTRLEN] = "";
563
if(inet_ntop(to.in6.sin6_family, &(to.in6.sin6_addr), addrstr,
564
sizeof(addrstr)) == NULL){
565
perror("inet_ntop");
566
} else {
567
if(strcmp(addrstr, ip) != 0){
568
fprintf(stderr, "Canonical address form: %s\n", addrstr);
569
}
570
}
361
fprintf(stderr, "Connection to: %s\n", ip);
571
362
}
572
363
573
ret = connect(tcp_sd, &to.in, sizeof(to));
364
ret = connect(tcp_sd, (struct sockaddr *) &to, sizeof(to));
574
365
if (ret < 0){
575
366
perror("connect");
576
367
return -1;
577
368
}
578
369
579
const char *out = mandos_protocol_version;
580
written = 0;
581
while (true){
582
size_t out_size = strlen(out);
583
ret = TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
584
out_size - written));
585
if (ret == -1){
586
perror("write");
587
retval = -1;
588
goto mandos_end;
589
}
590
written += (size_t)ret;
591
if(written < out_size){
592
continue;
593
} else {
594
if (out == mandos_protocol_version){
595
written = 0;
596
out = "\r\n";
597
} else {
598
break;
599
}
600
}
370
ret = initgnutls (&es);
371
if (ret != 0){
372
retval = -1;
373
return -1;
601
374
}
375
602
376
377
gnutls_transport_set_ptr (es.session, (gnutls_transport_ptr_t) tcp_sd);
378
603
379
if(debug){
604
fprintf(stderr, "Establishing TLS session with %s\n", ip);
380
fprintf(stderr, "Establishing tls session with %s\n", ip);
605
381
}
606
607
gnutls_transport_set_ptr (session, (gnutls_transport_ptr_t) tcp_sd);
608
609
do{
610
ret = gnutls_handshake (session);
611
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
382
383
384
ret = gnutls_handshake (es.session);
612
385
613
386
if (ret != GNUTLS_E_SUCCESS){
614
if(debug){
615
fprintf(stderr, "*** GnuTLS Handshake failed ***\n");
616
gnutls_perror (ret);
617
}
387
fprintf(stderr, "\n*** Handshake failed ***\n");
388
gnutls_perror (ret);
618
389
retval = -1;
619
goto mandos_end;
390
goto exit;
620
391
}
621
622
/* Read OpenPGP packet that contains the wanted password */
623
392
393
//Retrieve gpg packet that contains the wanted password
394
624
395
if(debug){
625
fprintf(stderr, "Retrieving pgp encrypted password from %s\n",
626
ip);
396
fprintf(stderr, "Retrieving pgp encrypted password from %s\n", ip);
627
397
}
628
398
629
399
while(true){
630
buffer_capacity = adjustbuffer(&buffer, buffer_length,
631
buffer_capacity);
632
if (buffer_capacity == 0){
633
perror("adjustbuffer");
634
retval = -1;
635
goto mandos_end;
400
if (buffer_length + BUFFER_SIZE > buffer_capacity){
401
buffer = realloc(buffer, buffer_capacity + BUFFER_SIZE);
402
if (buffer == NULL){
403
perror("realloc");
404
goto exit;
405
}
406
buffer_capacity += BUFFER_SIZE;
636
407
}
637
408
638
ret = gnutls_record_recv(session, buffer+buffer_length,
639
BUFFER_SIZE);
409
ret = gnutls_record_recv
410
(es.session, buffer+buffer_length, BUFFER_SIZE);
640
411
if (ret == 0){
641
412
break;
642
413
}
646
417
case GNUTLS_E_AGAIN:
647
418
break;
648
419
case GNUTLS_E_REHANDSHAKE:
649
do{
650
ret = gnutls_handshake (session);
651
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
420
ret = gnutls_handshake (es.session);
652
421
if (ret < 0){
653
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
422
fprintf(stderr, "\n*** Handshake failed ***\n");
654
423
gnutls_perror (ret);
655
424
retval = -1;
656
goto mandos_end;
425
goto exit;
657
426
}
658
427
break;
659
428
default:
660
fprintf(stderr, "Unknown error while reading data from"
661
" encrypted session with Mandos server\n");
429
fprintf(stderr, "Unknown error while reading data from encrypted session with mandos server\n");
662
430
retval = -1;
663
gnutls_bye (session, GNUTLS_SHUT_RDWR);
664
goto mandos_end;
431
gnutls_bye (es.session, GNUTLS_SHUT_RDWR);
432
goto exit;
665
433
}
666
434
} else {
667
buffer_length += (size_t) ret;
435
buffer_length += ret;
668
436
}
669
437
}
670
438
671
if(debug){
672
fprintf(stderr, "Closing TLS session\n");
673
}
674
675
gnutls_bye (session, GNUTLS_SHUT_RDWR);
676
677
439
if (buffer_length > 0){
678
decrypted_buffer_size = pgp_packet_decrypt(mc, buffer,
679
buffer_length,
680
&decrypted_buffer);
681
if (decrypted_buffer_size >= 0){
682
written = 0;
683
while(written < (size_t) decrypted_buffer_size){
684
ret = (int)fwrite (decrypted_buffer + written, 1,
685
(size_t)decrypted_buffer_size - written,
686
stdout);
687
if(ret == 0 and ferror(stdout)){
688
if(debug){
689
fprintf(stderr, "Error writing encrypted data: %s\n",
690
strerror(errno));
691
}
692
retval = -1;
693
break;
694
}
695
written += (size_t)ret;
696
}
440
if ((decrypted_buffer_size = gpg_packet_decrypt(buffer, buffer_length, &decrypted_buffer, CERT_ROOT)) >= 0){
441
fwrite (decrypted_buffer, 1, decrypted_buffer_size, stdout);
697
442
free(decrypted_buffer);
698
443
} else {
699
444
retval = -1;
700
445
}
701
} else {
702
retval = -1;
703
}
704
705
/* Shutdown procedure */
706
707
mandos_end:
446
}
447
448
//shutdown procedure
449
450
if(debug){
451
fprintf(stderr, "Closing tls session\n");
452
}
453
708
454
free(buffer);
709
ret = TEMP_FAILURE_RETRY(close(tcp_sd));
710
if(ret == -1){
711
perror("close");
712
}
713
gnutls_deinit (session);
455
gnutls_bye (es.session, GNUTLS_SHUT_RDWR);
456
exit:
457
close(tcp_sd);
458
gnutls_deinit (es.session);
459
gnutls_certificate_free_credentials (es.cred);
460
gnutls_global_deinit ();
714
461
return retval;
715
462
}
716
463
717
static void resolve_callback(AvahiSServiceResolver *r,
718
AvahiIfIndex interface,
719
AVAHI_GCC_UNUSED AvahiProtocol protocol,
720
AvahiResolverEvent event,
721
const char *name,
722
const char *type,
723
const char *domain,
724
const char *host_name,
725
const AvahiAddress *address,
726
uint16_t port,
727
AVAHI_GCC_UNUSED AvahiStringList *txt,
728
AVAHI_GCC_UNUSED AvahiLookupResultFlags
729
flags,
730
void* userdata) {
731
mandos_context *mc = userdata;
732
assert(r);
733
734
/* Called whenever a service has been resolved successfully or
735
timed out */
736
737
switch (event) {
738
default:
739
case AVAHI_RESOLVER_FAILURE:
740
fprintf(stderr, "(Avahi Resolver) Failed to resolve service '%s'"
741
" of type '%s' in domain '%s': %s\n", name, type, domain,
742
avahi_strerror(avahi_server_errno(mc->server)));
743
break;
744
745
case AVAHI_RESOLVER_FOUND:
746
{
747
char ip[AVAHI_ADDRESS_STR_MAX];
748
avahi_address_snprint(ip, sizeof(ip), address);
749
if(debug){
750
fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %"
751
PRIu16 ") on port %d\n", name, host_name, ip,
752
interface, port);
753
}
754
int ret = start_mandos_communication(ip, port, interface, mc);
755
if (ret == 0){
756
avahi_simple_poll_quit(mc->simple_poll);
757
}
758
}
759
}
760
avahi_s_service_resolver_free(r);
761
}
762
763
static void browse_callback( AvahiSServiceBrowser *b,
764
AvahiIfIndex interface,
765
AvahiProtocol protocol,
766
AvahiBrowserEvent event,
767
const char *name,
768
const char *type,
769
const char *domain,
770
AVAHI_GCC_UNUSED AvahiLookupResultFlags
771
flags,
772
void* userdata) {
773
mandos_context *mc = userdata;
774
assert(b);
775
776
/* Called whenever a new services becomes available on the LAN or
777
is removed from the LAN */
778
779
switch (event) {
780
default:
781
case AVAHI_BROWSER_FAILURE:
782
783
fprintf(stderr, "(Avahi browser) %s\n",
784
avahi_strerror(avahi_server_errno(mc->server)));
785
avahi_simple_poll_quit(mc->simple_poll);
786
return;
787
788
case AVAHI_BROWSER_NEW:
789
/* We ignore the returned Avahi resolver object. In the callback
790
function we free it. If the Avahi server is terminated before
791
the callback function is called the Avahi server will free the
792
resolver for us. */
793
794
if (!(avahi_s_service_resolver_new(mc->server, interface,
795
protocol, name, type, domain,
796
AVAHI_PROTO_INET6, 0,
797
resolve_callback, mc)))
798
fprintf(stderr, "Avahi: Failed to resolve service '%s': %s\n",
799
name, avahi_strerror(avahi_server_errno(mc->server)));
800
break;
801
802
case AVAHI_BROWSER_REMOVE:
803
break;
804
805
case AVAHI_BROWSER_ALL_FOR_NOW:
806
case AVAHI_BROWSER_CACHE_EXHAUSTED:
807
if(debug){
808
fprintf(stderr, "No Mandos server found, still searching...\n");
809
}
810
break;
811
}
812
}
813
814
int main(int argc, char *argv[]){
464
static AvahiSimplePoll *simple_poll = NULL;
465
static AvahiServer *server = NULL;
466
467
static void resolve_callback(
468
AvahiSServiceResolver *r,
469
AVAHI_GCC_UNUSED AvahiIfIndex interface,
470
AVAHI_GCC_UNUSED AvahiProtocol protocol,
471
AvahiResolverEvent event,
472
const char *name,
473
const char *type,
474
const char *domain,
475
const char *host_name,
476
const AvahiAddress *address,
477
uint16_t port,
478
AvahiStringList *txt,
479
AvahiLookupResultFlags flags,
480
AVAHI_GCC_UNUSED void* userdata) {
481
482
assert(r);
483
484
/* Called whenever a service has been resolved successfully or timed out */
485
486
switch (event) {
487
case AVAHI_RESOLVER_FAILURE:
488
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)));
489
break;
490
491
case AVAHI_RESOLVER_FOUND: {
492
char ip[AVAHI_ADDRESS_STR_MAX];
493
avahi_address_snprint(ip, sizeof(ip), address);
494
if(debug){
495
fprintf(stderr, "Mandos server found at %s on port %d\n", ip, port);
496
}
497
int ret = start_mandos_communication(ip, port);
498
if (ret == 0){
499
exit(EXIT_SUCCESS);
500
} else {
501
exit(EXIT_FAILURE);
502
}
503
}
504
}
505
avahi_s_service_resolver_free(r);
506
}
507
508
static void browse_callback(
509
AvahiSServiceBrowser *b,
510
AvahiIfIndex interface,
511
AvahiProtocol protocol,
512
AvahiBrowserEvent event,
513
const char *name,
514
const char *type,
515
const char *domain,
516
AVAHI_GCC_UNUSED AvahiLookupResultFlags flags,
517
void* userdata) {
518
519
AvahiServer *s = userdata;
520
assert(b);
521
522
/* Called whenever a new services becomes available on the LAN or is removed from the LAN */
523
524
switch (event) {
525
526
case AVAHI_BROWSER_FAILURE:
527
528
fprintf(stderr, "(Browser) %s\n", avahi_strerror(avahi_server_errno(server)));
529
avahi_simple_poll_quit(simple_poll);
530
return;
531
532
case AVAHI_BROWSER_NEW:
533
/* We ignore the returned resolver object. In the callback
534
function we free it. If the server is terminated before
535
the callback function is called the server will free
536
the resolver for us. */
537
538
if (!(avahi_s_service_resolver_new(s, interface, protocol, name, type, domain, AVAHI_PROTO_INET6, 0, resolve_callback, s)))
539
fprintf(stderr, "Failed to resolve service '%s': %s\n", name, avahi_strerror(avahi_server_errno(s)));
540
541
break;
542
543
case AVAHI_BROWSER_REMOVE:
544
break;
545
546
case AVAHI_BROWSER_ALL_FOR_NOW:
547
case AVAHI_BROWSER_CACHE_EXHAUSTED:
548
break;
549
}
550
}
551
552
int main(AVAHI_GCC_UNUSED int argc, AVAHI_GCC_UNUSED char*argv[]) {
553
AvahiServerConfig config;
815
554
AvahiSServiceBrowser *sb = NULL;
555
const char db[] = "--debug";
816
556
int error;
817
int ret;
818
int exitcode = EXIT_SUCCESS;
819
const char *interface = "eth0";
820
struct ifreq network;
821
int sd;
822
uid_t uid;
823
gid_t gid;
824
char *connect_to = NULL;
825
char tempdir[] = "/tmp/mandosXXXXXX";
826
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
827
const char *seckey = PATHDIR "/" SECKEY;
828
const char *pubkey = PATHDIR "/" PUBKEY;
829
830
mandos_context mc = { .simple_poll = NULL, .server = NULL,
831
.dh_bits = 1024, .priority = "SECURE256"
832
":!CTYPE-X.509:+CTYPE-OPENPGP" };
833
bool gnutls_initalized = false;
834
bool gpgme_initalized = false;
835
836
{
837
struct argp_option options[] = {
838
{ .name = "debug", .key = 128,
839
.doc = "Debug mode", .group = 3 },
840
{ .name = "connect", .key = 'c',
841
.arg = "ADDRESS:PORT",
842
.doc = "Connect directly to a specific Mandos server",
843
.group = 1 },
844
{ .name = "interface", .key = 'i',
845
.arg = "NAME",
846
.doc = "Interface that will be used to search for Mandos"
847
" servers",
848
.group = 1 },
849
{ .name = "seckey", .key = 's',
850
.arg = "FILE",
851
.doc = "OpenPGP secret key file base name",
852
.group = 1 },
853
{ .name = "pubkey", .key = 'p',
854
.arg = "FILE",
855
.doc = "OpenPGP public key file base name",
856
.group = 2 },
857
{ .name = "dh-bits", .key = 129,
858
.arg = "BITS",
859
.doc = "Bit length of the prime number used in the"
860
" Diffie-Hellman key exchange",
861
.group = 2 },
862
{ .name = "priority", .key = 130,
863
.arg = "STRING",
864
.doc = "GnuTLS priority string for the TLS handshake",
865
.group = 1 },
866
{ .name = NULL }
867
};
868
869
error_t parse_opt (int key, char *arg,
870
struct argp_state *state) {
871
/* Get the INPUT argument from `argp_parse', which we know is
872
a pointer to our plugin list pointer. */
873
switch (key) {
874
case 128: /* --debug */
875
debug = true;
876
break;
877
case 'c': /* --connect */
878
connect_to = arg;
879
break;
880
case 'i': /* --interface */
881
interface = arg;
882
break;
883
case 's': /* --seckey */
884
seckey = arg;
885
break;
886
case 'p': /* --pubkey */
887
pubkey = arg;
888
break;
889
case 129: /* --dh-bits */
890
errno = 0;
891
mc.dh_bits = (unsigned int) strtol(arg, NULL, 10);
892
if (errno){
893
perror("strtol");
894
exit(EXIT_FAILURE);
557
int ret = 1;
558
int returncode = EXIT_SUCCESS;
559
char *basename = rindex(argv[0], '/');
560
if(basename == NULL){
561
basename = argv[0];
562
} else {
563
basename++;
564
}
565
566
char *program_name = malloc(strlen(basename) + sizeof(db));
567
568
if (program_name == NULL){
569
perror("argv[0]");
570
return EXIT_FAILURE;
571
}
572
573
program_name[0] = '\0';
574
575
for (int i = 1; i < argc; i++){
576
if (not strncmp(argv[i], db, 5)){
577
strcat(strcat(strcat(program_name, db ), "="), basename);
578
if(not strcmp(argv[i], db) or not strcmp(argv[i], program_name)){
579
debug = true;
895
580
}
896
break;
897
case 130: /* --priority */
898
mc.priority = arg;
899
break;
900
case ARGP_KEY_ARG:
901
argp_usage (state);
902
case ARGP_KEY_END:
903
break;
904
default:
905
return ARGP_ERR_UNKNOWN;
906
}
907
return 0;
908
}
909
910
struct argp argp = { .options = options, .parser = parse_opt,
911
.args_doc = "",
912
.doc = "Mandos client -- Get and decrypt"
913
" passwords from a Mandos server" };
914
ret = argp_parse (&argp, argc, argv, 0, 0, NULL);
915
if (ret == ARGP_ERR_UNKNOWN){
916
fprintf(stderr, "Unknown error while parsing arguments\n");
917
exitcode = EXIT_FAILURE;
918
goto end;
919
}
920
}
921
922
/* If the interface is down, bring it up */
923
{
924
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
925
if(sd < 0) {
926
perror("socket");
927
exitcode = EXIT_FAILURE;
928
goto end;
929
}
930
strcpy(network.ifr_name, interface);
931
ret = ioctl(sd, SIOCGIFFLAGS, &network);
932
if(ret == -1){
933
perror("ioctl SIOCGIFFLAGS");
934
exitcode = EXIT_FAILURE;
935
goto end;
936
}
937
if((network.ifr_flags & IFF_UP) == 0){
938
network.ifr_flags |= IFF_UP;
939
ret = ioctl(sd, SIOCSIFFLAGS, &network);
940
if(ret == -1){
941
perror("ioctl SIOCSIFFLAGS");
942
exitcode = EXIT_FAILURE;
943
goto end;
944
}
945
}
946
ret = TEMP_FAILURE_RETRY(close(sd));
947
if(ret == -1){
948
perror("close");
949
}
950
}
951
952
uid = getuid();
953
gid = getgid();
954
955
ret = setuid(uid);
956
if (ret == -1){
957
perror("setuid");
958
}
959
960
setgid(gid);
961
if (ret == -1){
962
perror("setgid");
963
}
964
965
ret = init_gnutls_global(&mc, pubkey, seckey);
966
if (ret == -1){
967
fprintf(stderr, "init_gnutls_global failed\n");
968
exitcode = EXIT_FAILURE;
969
goto end;
970
} else {
971
gnutls_initalized = true;
972
}
973
974
if(mkdtemp(tempdir) == NULL){
975
perror("mkdtemp");
976
tempdir[0] = '\0';
977
goto end;
978
}
979
980
if(not init_gpgme(&mc, pubkey, seckey, tempdir)){
981
fprintf(stderr, "gpgme_initalized failed\n");
982
exitcode = EXIT_FAILURE;
983
goto end;
984
} else {
985
gpgme_initalized = true;
986
}
987
988
if_index = (AvahiIfIndex) if_nametoindex(interface);
989
if(if_index == 0){
990
fprintf(stderr, "No such interface: \"%s\"\n", interface);
991
exit(EXIT_FAILURE);
992
}
993
994
if(connect_to != NULL){
995
/* Connect directly, do not use Zeroconf */
996
/* (Mainly meant for debugging) */
997
char *address = strrchr(connect_to, ':');
998
if(address == NULL){
999
fprintf(stderr, "No colon in address\n");
1000
exitcode = EXIT_FAILURE;
1001
goto end;
1002
}
1003
errno = 0;
1004
uint16_t port = (uint16_t) strtol(address+1, NULL, 10);
1005
if(errno){
1006
perror("Bad port number");
1007
exitcode = EXIT_FAILURE;
1008
goto end;
1009
}
1010
*address = '\0';
1011
address = connect_to;
1012
ret = start_mandos_communication(address, port, if_index, &mc);
1013
if(ret < 0){
1014
exitcode = EXIT_FAILURE;
1015
} else {
1016
exitcode = EXIT_SUCCESS;
1017
}
1018
goto end;
1019
}
1020
581
}
582
}
583
free(program_name);
584
1021
585
if (not debug){
1022
586
avahi_set_log_function(empty_log);
1023
587
}
1024
588
1025
/* Initialize the pseudo-RNG for Avahi */
1026
srand((unsigned int) time(NULL));
1027
1028
/* Allocate main Avahi loop object */
1029
mc.simple_poll = avahi_simple_poll_new();
1030
if (mc.simple_poll == NULL) {
1031
fprintf(stderr, "Avahi: Failed to create simple poll"
1032
" object.\n");
1033
exitcode = EXIT_FAILURE;
1034
goto end;
1035
}
1036
1037
{
1038
AvahiServerConfig config;
1039
/* Do not publish any local Zeroconf records */
1040
avahi_server_config_init(&config);
1041
config.publish_hinfo = 0;
1042
config.publish_addresses = 0;
1043
config.publish_workstation = 0;
1044
config.publish_domain = 0;
1045
1046
/* Allocate a new server */
1047
mc.server = avahi_server_new(avahi_simple_poll_get
1048
(mc.simple_poll), &config, NULL,
1049
NULL, &error);
1050
1051
/* Free the Avahi configuration data */
1052
avahi_server_config_free(&config);
1053
}
1054
1055
/* Check if creating the Avahi server object succeeded */
1056
if (mc.server == NULL) {
1057
fprintf(stderr, "Failed to create Avahi server: %s\n",
1058
avahi_strerror(error));
1059
exitcode = EXIT_FAILURE;
1060
goto end;
1061
}
1062
1063
/* Create the Avahi service browser */
1064
sb = avahi_s_service_browser_new(mc.server, if_index,
1065
AVAHI_PROTO_INET6,
1066
"_mandos._tcp", NULL, 0,
1067
browse_callback, &mc);
1068
if (sb == NULL) {
1069
fprintf(stderr, "Failed to create service browser: %s\n",
1070
avahi_strerror(avahi_server_errno(mc.server)));
1071
exitcode = EXIT_FAILURE;
1072
goto end;
589
/* Initialize the psuedo-RNG */
590
srand(time(NULL));
591
592
/* Allocate main loop object */
593
if (!(simple_poll = avahi_simple_poll_new())) {
594
fprintf(stderr, "Failed to create simple poll object.\n");
595
596
goto exit;
597
}
598
599
/* Do not publish any local records */
600
avahi_server_config_init(&config);
601
config.publish_hinfo = 0;
602
config.publish_addresses = 0;
603
config.publish_workstation = 0;
604
config.publish_domain = 0;
605
606
/* Allocate a new server */
607
server = avahi_server_new(avahi_simple_poll_get(simple_poll), &config, NULL, NULL, &error);
608
609
/* Free the configuration data */
610
avahi_server_config_free(&config);
611
612
/* Check if creating the server object succeeded */
613
if (!server) {
614
fprintf(stderr, "Failed to create server: %s\n", avahi_strerror(error));
615
returncode = EXIT_FAILURE;
616
goto exit;
617
}
618
619
/* Create the service browser */
620
if (!(sb = avahi_s_service_browser_new(server, if_nametoindex("eth0"), AVAHI_PROTO_INET6, "_mandos._tcp", NULL, 0, browse_callback, server))) {
621
fprintf(stderr, "Failed to create service browser: %s\n", avahi_strerror(avahi_server_errno(server)));
622
returncode = EXIT_FAILURE;
623
goto exit;
1073
624
}
1074
625
1075
626
/* Run the main loop */
1076
627
1077
628
if (debug){
1078
fprintf(stderr, "Starting Avahi loop search\n");
629
fprintf(stderr, "Starting avahi loop search\n");
1079
630
}
1080
631
1081
avahi_simple_poll_loop(mc.simple_poll);
1082
1083
end:
1084
632
avahi_simple_poll_loop(simple_poll);
633
634
exit:
635
1085
636
if (debug){
1086
637
fprintf(stderr, "%s exiting\n", argv[0]);
1087
638
}
1088
639
1089
640
/* Cleanup things */
1090
if (sb != NULL)
641
if (sb)
1091
642
avahi_s_service_browser_free(sb);
1092
643
1093
if (mc.server != NULL)
1094
avahi_server_free(mc.server);
1095
1096
if (mc.simple_poll != NULL)
1097
avahi_simple_poll_free(mc.simple_poll);
1098
1099
if (gnutls_initalized){
1100
gnutls_certificate_free_credentials(mc.cred);
1101
gnutls_global_deinit ();
1102
gnutls_dh_params_deinit(mc.dh_params);
1103
}
1104
1105
if(gpgme_initalized){
1106
gpgme_release(mc.ctx);
1107
}
1108
1109
/* Removes the temp directory used by GPGME */
1110
if(tempdir[0] != '\0'){
1111
DIR *d;
1112
struct dirent *direntry;
1113
d = opendir(tempdir);
1114
if(d == NULL){
1115
perror("opendir");
1116
} else {
1117
while(true){
1118
direntry = readdir(d);
1119
if(direntry == NULL){
1120
break;
1121
}
1122
if (direntry->d_type == DT_REG){
1123
char *fullname = NULL;
1124
ret = asprintf(&fullname, "%s/%s", tempdir,
1125
direntry->d_name);
1126
if(ret < 0){
1127
perror("asprintf");
1128
continue;
1129
}
1130
ret = unlink(fullname);
1131
if(ret == -1){
1132
fprintf(stderr, "unlink(\"%s\"): %s",
1133
fullname, strerror(errno));
1134
}
1135
free(fullname);
1136
}
1137
}
1138
closedir(d);
1139
}
1140
ret = rmdir(tempdir);
1141
if(ret == -1){
1142
perror("rmdir");
1143
}
1144
}
1145
1146
return exitcode;
644
if (server)
645
avahi_server_free(server);
646
647
if (simple_poll)
648
avahi_simple_poll_free(simple_poll);
649
650
return ret;
1147
651
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0