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- Committer: Teddy Hogeborn
- Date: 2008-09-05 18:37:28 UTC
- Revision ID: teddy@fukt.bsnet.se-20080905183728-l0m8v3vqa302uwrw
* mandos (main): Use EAFP with pidfile.
- files added:
- .bzrignore
- files removed:
- ca.pem
- files renamed:
- mandos-clients.conf => clients.conf
- server.py => mandos
- plugbasedclient.c => plugin-runner.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
8
8
* includes the following functions: "resolve_callback",
9
9
* "browse_callback", and parts of "main".
10
10
*
11
* Everything else is Copyright © 2007-2008 Teddy Hogeborn and Björn
12
* Påhlsson.
11
* Everything else is
12
* Copyright © 2007-2008 Teddy Hogeborn & Björn Påhlsson
13
13
*
14
14
* This program is free software: you can redistribute it and/or
15
15
* modify it under the terms of the GNU General Public License as
25
25
* along with this program. If not, see
26
26
* <http://www.gnu.org/licenses/>.
27
27
*
28
* Contact the authors at <https://www.fukt.bsnet.se/~belorn/> and
29
* <https://www.fukt.bsnet.se/~teddy/>.
28
* Contact the authors at <mandos@fukt.bsnet.se>.
30
29
*/
31
30
32
#define _FORTIFY_SOURCE 2
33
31
/* Needed by GPGME, specifically gpgme_data_seek() */
34
32
#define _LARGEFILE_SOURCE
35
33
#define _FILE_OFFSET_BITS 64
36
34
37
#include <stdio.h>
38
#include <assert.h>
39
#include <stdlib.h>
40
#include <time.h>
41
#include <net/if.h> /* if_nametoindex */
42
#include <sys/ioctl.h> // ioctl, ifreq, SIOCGIFFLAGS, IFF_UP, SIOCSIFFLAGS
43
#include <net/if.h> // ioctl, ifreq, SIOCGIFFLAGS, IFF_UP, SIOCSIFFLAGS
44
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_* */
45
79
#include <avahi-core/core.h>
46
80
#include <avahi-core/lookup.h>
47
81
#include <avahi-core/log.h>
49
83
#include <avahi-common/malloc.h>
50
84
#include <avahi-common/error.h>
51
85
52
//mandos client part
53
#include <sys/types.h> /* socket(), inet_pton() */
54
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
55
struct in6_addr, inet_pton() */
56
#include <gnutls/gnutls.h> /* All GnuTLS stuff */
57
#include <gnutls/openpgp.h> /* GnuTLS with openpgp stuff */
58
59
#include <unistd.h> /* close() */
60
#include <netinet/in.h>
61
#include <stdbool.h> /* true */
62
#include <string.h> /* memset */
63
#include <arpa/inet.h> /* inet_pton() */
64
#include <iso646.h> /* not */
65
66
// gpgme
67
#include <errno.h> /* perror() */
68
#include <gpgme.h>
69
70
// getopt long
71
#include <getopt.h>
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_* */
72
101
73
102
#define BUFFER_SIZE 256
74
#define DH_BITS 1024
75
76
const char *certdir = "/conf/conf.d/cryptkeyreq/";
77
const char *certfile = "openpgp-client.txt";
78
const char *certkey = "openpgp-client-key.txt";
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 "pupkey.txt"
79
111
80
112
bool debug = false;
113
static const char mandos_protocol_version[] = "1";
114
const char *argp_program_version = "password-request 1.0";
115
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
81
116
117
/* Used for passing in values through the Avahi callback functions */
82
118
typedef struct {
83
gnutls_session_t session;
119
AvahiSimplePoll *simple_poll;
120
AvahiServer *server;
84
121
gnutls_certificate_credentials_t cred;
122
unsigned int dh_bits;
85
123
gnutls_dh_params_t dh_params;
86
} encrypted_session;
87
88
89
ssize_t pgp_packet_decrypt (char *packet, size_t packet_size,
90
char **new_packet, const char *homedir){
91
gpgme_data_t dh_crypto, dh_plain;
124
const char *priority;
92
125
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;
93
151
gpgme_error_t rc;
94
ssize_t ret;
95
ssize_t new_packet_capacity = 0;
96
ssize_t new_packet_length = 0;
97
152
gpgme_engine_info_t engine_info;
98
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
99
190
if (debug){
100
fprintf(stderr, "Trying to decrypt OpenPGP packet\n");
191
fprintf(stderr, "Initialize gpgme\n");
101
192
}
102
193
103
194
/* Init GPGME */
104
195
gpgme_check_version(NULL);
105
196
rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
106
197
if (rc != GPG_ERR_NO_ERROR){
107
198
fprintf(stderr, "bad gpgme_engine_check_version: %s: %s\n",
108
199
gpgme_strsource(rc), gpgme_strerror(rc));
109
return -1;
200
return false;
110
201
}
111
112
/* Set GPGME home directory */
202
203
/* Set GPGME home directory for the OpenPGP engine only */
113
204
rc = gpgme_get_engine_info (&engine_info);
114
205
if (rc != GPG_ERR_NO_ERROR){
115
206
fprintf(stderr, "bad gpgme_get_engine_info: %s: %s\n",
116
207
gpgme_strsource(rc), gpgme_strerror(rc));
117
return -1;
208
return false;
118
209
}
119
210
while(engine_info != NULL){
120
211
if(engine_info->protocol == GPGME_PROTOCOL_OpenPGP){
121
212
gpgme_set_engine_info(GPGME_PROTOCOL_OpenPGP,
122
engine_info->file_name, homedir);
213
engine_info->file_name, tempdir);
123
214
break;
124
215
}
125
216
engine_info = engine_info->next;
126
217
}
127
218
if(engine_info == NULL){
128
fprintf(stderr, "Could not set home dir to %s\n", homedir);
129
return -1;
130
}
131
132
/* Create new GPGME data buffer from packet buffer */
133
rc = gpgme_data_new_from_mem(&dh_crypto, packet, packet_size, 0);
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);
134
259
if (rc != GPG_ERR_NO_ERROR){
135
260
fprintf(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
136
261
gpgme_strsource(rc), gpgme_strerror(rc));
142
267
if (rc != GPG_ERR_NO_ERROR){
143
268
fprintf(stderr, "bad gpgme_data_new: %s: %s\n",
144
269
gpgme_strsource(rc), gpgme_strerror(rc));
145
return -1;
146
}
147
148
/* Create new GPGME "context" */
149
rc = gpgme_new(&ctx);
150
if (rc != GPG_ERR_NO_ERROR){
151
fprintf(stderr, "bad gpgme_new: %s: %s\n",
152
gpgme_strsource(rc), gpgme_strerror(rc));
153
return -1;
154
}
155
156
/* Decrypt data from the FILE pointer to the plaintext data
157
buffer */
158
rc = gpgme_op_decrypt(ctx, dh_crypto, dh_plain);
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);
159
277
if (rc != GPG_ERR_NO_ERROR){
160
278
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
161
279
gpgme_strsource(rc), gpgme_strerror(rc));
162
return -1;
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
}
306
}
307
}
308
}
309
goto decrypt_end;
163
310
}
164
311
165
312
if(debug){
166
fprintf(stderr, "Decryption of OpenPGP packet succeeded\n");
167
}
168
169
if (debug){
170
gpgme_decrypt_result_t result;
171
result = gpgme_op_decrypt_result(ctx);
172
if (result == NULL){
173
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
174
} else {
175
fprintf(stderr, "Unsupported algorithm: %s\n",
176
result->unsupported_algorithm);
177
fprintf(stderr, "Wrong key usage: %d\n",
178
result->wrong_key_usage);
179
if(result->file_name != NULL){
180
fprintf(stderr, "File name: %s\n", result->file_name);
181
}
182
gpgme_recipient_t recipient;
183
recipient = result->recipients;
184
if(recipient){
185
while(recipient != NULL){
186
fprintf(stderr, "Public key algorithm: %s\n",
187
gpgme_pubkey_algo_name(recipient->pubkey_algo));
188
fprintf(stderr, "Key ID: %s\n", recipient->keyid);
189
fprintf(stderr, "Secret key available: %s\n",
190
recipient->status == GPG_ERR_NO_SECKEY
191
? "No" : "Yes");
192
recipient = recipient->next;
193
}
194
}
195
}
196
}
197
198
/* Delete the GPGME FILE pointer cryptotext data buffer */
199
gpgme_data_release(dh_crypto);
313
fprintf(stderr, "Decryption of OpenPGP data succeeded\n");
314
}
200
315
201
316
/* Seek back to the beginning of the GPGME plaintext data buffer */
202
317
if (gpgme_data_seek(dh_plain, (off_t) 0, SEEK_SET) == -1){
203
318
perror("pgpme_data_seek");
319
plaintext_length = -1;
320
goto decrypt_end;
204
321
}
205
322
206
*new_packet = 0;
323
*plaintext = NULL;
207
324
while(true){
208
if (new_packet_length + BUFFER_SIZE > new_packet_capacity){
209
*new_packet = realloc(*new_packet,
210
(unsigned int)new_packet_capacity
211
+ BUFFER_SIZE);
212
if (*new_packet == NULL){
213
perror("realloc");
214
return -1;
215
}
216
new_packet_capacity += BUFFER_SIZE;
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;
217
332
}
218
333
219
ret = gpgme_data_read(dh_plain, *new_packet + new_packet_length,
334
ret = gpgme_data_read(dh_plain, *plaintext + plaintext_length,
220
335
BUFFER_SIZE);
221
336
/* Print the data, if any */
222
337
if (ret == 0){
338
/* EOF */
223
339
break;
224
340
}
225
341
if(ret < 0){
226
342
perror("gpgme_data_read");
227
return -1;
228
}
229
new_packet_length += ret;
230
}
231
232
/* FIXME: check characters before printing to screen so to not print
233
terminal control characters */
234
/* if(debug){ */
235
/* fprintf(stderr, "decrypted password is: "); */
236
/* fwrite(*new_packet, 1, new_packet_length, stderr); */
237
/* fprintf(stderr, "\n"); */
238
/* } */
343
plaintext_length = -1;
344
goto decrypt_end;
345
}
346
plaintext_length += ret;
347
}
348
349
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");
355
}
356
357
decrypt_end:
358
359
/* Delete the GPGME cryptotext data buffer */
360
gpgme_data_release(dh_crypto);
239
361
240
362
/* Delete the GPGME plaintext data buffer */
241
363
gpgme_data_release(dh_plain);
242
return new_packet_length;
364
return plaintext_length;
243
365
}
244
366
245
367
static const char * safer_gnutls_strerror (int value) {
246
const char *ret = gnutls_strerror (value);
368
const char *ret = gnutls_strerror (value); /* Spurious warning */
247
369
if (ret == NULL)
248
370
ret = "(unknown)";
249
371
return ret;
250
372
}
251
373
252
void debuggnutls(__attribute__((unused)) int level,
253
const char* string){
254
fprintf(stderr, "%s", string);
374
/* GnuTLS log function callback */
375
static void debuggnutls(__attribute__((unused)) int level,
376
const char* string){
377
fprintf(stderr, "GnuTLS: %s", string);
255
378
}
256
379
257
int initgnutls(encrypted_session *es){
258
const char *err;
380
static int init_gnutls_global(mandos_context *mc,
381
const char *pubkeyfilename,
382
const char *seckeyfilename){
259
383
int ret;
260
384
261
385
if(debug){
262
386
fprintf(stderr, "Initializing GnuTLS\n");
263
387
}
264
265
if ((ret = gnutls_global_init ())
266
!= GNUTLS_E_SUCCESS) {
267
fprintf (stderr, "global_init: %s\n", safer_gnutls_strerror(ret));
388
389
ret = gnutls_global_init();
390
if (ret != GNUTLS_E_SUCCESS) {
391
fprintf (stderr, "GnuTLS global_init: %s\n",
392
safer_gnutls_strerror(ret));
268
393
return -1;
269
394
}
270
395
271
396
if (debug){
397
/* "Use a log level over 10 to enable all debugging options."
398
* - GnuTLS manual
399
*/
272
400
gnutls_global_set_log_level(11);
273
401
gnutls_global_set_log_function(debuggnutls);
274
402
}
275
403
276
/* openpgp credentials */
277
if ((ret = gnutls_certificate_allocate_credentials (&es->cred))
278
!= GNUTLS_E_SUCCESS) {
279
fprintf (stderr, "memory error: %s\n",
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 */
280
409
safer_gnutls_strerror(ret));
410
gnutls_global_deinit ();
281
411
return -1;
282
412
}
283
413
284
414
if(debug){
285
fprintf(stderr, "Attempting to use OpenPGP certificate %s"
286
" and keyfile %s as GnuTLS credentials\n", certfile,
287
certkey);
415
fprintf(stderr, "Attempting to use OpenPGP public key %s and"
416
" secret key %s as GnuTLS credentials\n", pubkeyfilename,
417
seckeyfilename);
288
418
}
289
419
290
420
ret = gnutls_certificate_set_openpgp_key_file
291
(es->cred, certfile, certkey, GNUTLS_OPENPGP_FMT_BASE64);
421
(mc->cred, pubkeyfilename, seckeyfilename,
422
GNUTLS_OPENPGP_FMT_BASE64);
292
423
if (ret != GNUTLS_E_SUCCESS) {
293
fprintf
294
(stderr, "Error[%d] while reading the OpenPGP key pair ('%s',"
295
" '%s')\n",
296
ret, certfile, certkey);
297
fprintf(stdout, "The Error is: %s\n",
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",
298
428
safer_gnutls_strerror(ret));
299
return -1;
300
}
301
302
//GnuTLS server initialization
303
if ((ret = gnutls_dh_params_init (&es->dh_params))
304
!= GNUTLS_E_SUCCESS) {
305
fprintf (stderr, "Error in dh parameter initialization: %s\n",
306
safer_gnutls_strerror(ret));
307
return -1;
308
}
309
310
if ((ret = gnutls_dh_params_generate2 (es->dh_params, DH_BITS))
311
!= GNUTLS_E_SUCCESS) {
312
fprintf (stderr, "Error in prime generation: %s\n",
313
safer_gnutls_strerror(ret));
314
return -1;
315
}
316
317
gnutls_certificate_set_dh_params (es->cred, es->dh_params);
318
319
// GnuTLS session creation
320
if ((ret = gnutls_init (&es->session, GNUTLS_SERVER))
321
!= GNUTLS_E_SUCCESS){
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
return -1;
455
}
456
457
static int init_gnutls_session(mandos_context *mc,
458
gnutls_session_t *session){
459
int ret;
460
/* GnuTLS session creation */
461
ret = gnutls_init(session, GNUTLS_SERVER);
462
if (ret != GNUTLS_E_SUCCESS){
322
463
fprintf(stderr, "Error in GnuTLS session initialization: %s\n",
323
464
safer_gnutls_strerror(ret));
324
465
}
325
466
326
if ((ret = gnutls_priority_set_direct (es->session, "NORMAL", &err))
327
!= GNUTLS_E_SUCCESS) {
328
fprintf(stderr, "Syntax error at: %s\n", err);
329
fprintf(stderr, "GnuTLS error: %s\n",
330
safer_gnutls_strerror(ret));
331
return -1;
467
{
468
const char *err;
469
ret = gnutls_priority_set_direct(*session, mc->priority, &err);
470
if (ret != GNUTLS_E_SUCCESS) {
471
fprintf(stderr, "Syntax error at: %s\n", err);
472
fprintf(stderr, "GnuTLS error: %s\n",
473
safer_gnutls_strerror(ret));
474
gnutls_deinit (*session);
475
return -1;
476
}
332
477
}
333
478
334
if ((ret = gnutls_credentials_set
335
(es->session, GNUTLS_CRD_CERTIFICATE, es->cred))
336
!= GNUTLS_E_SUCCESS) {
337
fprintf(stderr, "Error setting a credentials set: %s\n",
479
ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,
480
mc->cred);
481
if (ret != GNUTLS_E_SUCCESS) {
482
fprintf(stderr, "Error setting GnuTLS credentials: %s\n",
338
483
safer_gnutls_strerror(ret));
484
gnutls_deinit (*session);
339
485
return -1;
340
486
}
341
487
342
488
/* ignore client certificate if any. */
343
gnutls_certificate_server_set_request (es->session,
489
gnutls_certificate_server_set_request (*session,
344
490
GNUTLS_CERT_IGNORE);
345
491
346
gnutls_dh_set_prime_bits (es->session, DH_BITS);
492
gnutls_dh_set_prime_bits (*session, mc->dh_bits);
347
493
348
494
return 0;
349
495
}
350
496
351
void empty_log(__attribute__((unused)) AvahiLogLevel level,
352
__attribute__((unused)) const char *txt){}
497
/* Avahi log function callback */
498
static void empty_log(__attribute__((unused)) AvahiLogLevel level,
499
__attribute__((unused)) const char *txt){}
353
500
354
int start_mandos_communication(const char *ip, uint16_t port,
355
unsigned int if_index){
501
/* Called when a Mandos server is found */
502
static int start_mandos_communication(const char *ip, uint16_t port,
503
AvahiIfIndex if_index,
504
mandos_context *mc){
356
505
int ret, tcp_sd;
357
struct sockaddr_in6 to;
358
encrypted_session es;
506
union { struct sockaddr in; struct sockaddr_in6 in6; } to;
359
507
char *buffer = NULL;
360
508
char *decrypted_buffer;
361
509
size_t buffer_length = 0;
362
510
size_t buffer_capacity = 0;
363
511
ssize_t decrypted_buffer_size;
364
size_t written = 0;
512
size_t written;
365
513
int retval = 0;
366
514
char interface[IF_NAMESIZE];
515
gnutls_session_t session;
516
517
ret = init_gnutls_session (mc, &session);
518
if (ret != 0){
519
return -1;
520
}
367
521
368
522
if(debug){
369
fprintf(stderr, "Setting up a tcp connection to %s\n", ip);
523
fprintf(stderr, "Setting up a tcp connection to %s, port %" PRIu16
524
"\n", ip, port);
370
525
}
371
526
372
527
tcp_sd = socket(PF_INET6, SOCK_STREAM, 0);
374
529
perror("socket");
375
530
return -1;
376
531
}
377
532
378
533
if(debug){
379
if(if_indextoname(if_index, interface) == NULL){
380
if(debug){
381
perror("if_indextoname");
382
}
534
if(if_indextoname((unsigned int)if_index, interface) == NULL){
535
perror("if_indextoname");
383
536
return -1;
384
537
}
385
386
538
fprintf(stderr, "Binding to interface %s\n", interface);
387
539
}
388
540
389
memset(&to,0,sizeof(to)); /* Spurious warning */
390
to.sin6_family = AF_INET6;
391
ret = inet_pton(AF_INET6, ip, &to.sin6_addr);
541
memset(&to, 0, sizeof(to));
542
to.in6.sin6_family = AF_INET6;
543
/* It would be nice to have a way to detect if we were passed an
544
IPv4 address here. Now we assume an IPv6 address. */
545
ret = inet_pton(AF_INET6, ip, &to.in6.sin6_addr);
392
546
if (ret < 0 ){
393
547
perror("inet_pton");
394
548
return -1;
395
}
549
}
396
550
if(ret == 0){
397
551
fprintf(stderr, "Bad address: %s\n", ip);
398
552
return -1;
399
553
}
400
to.sin6_port = htons(port); /* Spurious warning */
554
to.in6.sin6_port = htons(port); /* Spurious warning */
401
555
402
to.sin6_scope_id = (uint32_t)if_index;
556
to.in6.sin6_scope_id = (uint32_t)if_index;
403
557
404
558
if(debug){
405
fprintf(stderr, "Connection to: %s\n", ip);
559
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
560
port);
561
char addrstr[INET6_ADDRSTRLEN] = "";
562
if(inet_ntop(to.in6.sin6_family, &(to.in6.sin6_addr), addrstr,
563
sizeof(addrstr)) == NULL){
564
perror("inet_ntop");
565
} else {
566
if(strcmp(addrstr, ip) != 0){
567
fprintf(stderr, "Canonical address form: %s\n", addrstr);
568
}
569
}
406
570
}
407
571
408
ret = connect(tcp_sd, (struct sockaddr *) &to, sizeof(to));
572
ret = connect(tcp_sd, &to.in, sizeof(to));
409
573
if (ret < 0){
410
574
perror("connect");
411
575
return -1;
412
576
}
413
577
414
ret = initgnutls (&es);
415
if (ret != 0){
416
retval = -1;
417
return -1;
578
const char *out = mandos_protocol_version;
579
written = 0;
580
while (true){
581
size_t out_size = strlen(out);
582
ret = TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
583
out_size - written));
584
if (ret == -1){
585
perror("write");
586
retval = -1;
587
goto mandos_end;
588
}
589
written += (size_t)ret;
590
if(written < out_size){
591
continue;
592
} else {
593
if (out == mandos_protocol_version){
594
written = 0;
595
out = "\r\n";
596
} else {
597
break;
598
}
599
}
418
600
}
419
601
420
gnutls_transport_set_ptr (es.session,
421
(gnutls_transport_ptr_t) tcp_sd);
422
423
602
if(debug){
424
603
fprintf(stderr, "Establishing TLS session with %s\n", ip);
425
604
}
426
605
427
ret = gnutls_handshake (es.session);
606
gnutls_transport_set_ptr (session, (gnutls_transport_ptr_t) tcp_sd);
607
608
do{
609
ret = gnutls_handshake (session);
610
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
428
611
429
612
if (ret != GNUTLS_E_SUCCESS){
430
613
if(debug){
431
fprintf(stderr, "\n*** Handshake failed ***\n");
614
fprintf(stderr, "*** GnuTLS Handshake failed ***\n");
432
615
gnutls_perror (ret);
433
616
}
434
617
retval = -1;
435
goto exit;
618
goto mandos_end;
436
619
}
437
620
438
//Retrieve OpenPGP packet that contains the wanted password
621
/* Read OpenPGP packet that contains the wanted password */
439
622
440
623
if(debug){
441
624
fprintf(stderr, "Retrieving pgp encrypted password from %s\n",
442
625
ip);
443
626
}
444
627
445
628
while(true){
446
if (buffer_length + BUFFER_SIZE > buffer_capacity){
447
buffer = realloc(buffer, buffer_capacity + BUFFER_SIZE);
448
if (buffer == NULL){
449
perror("realloc");
450
goto exit;
451
}
452
buffer_capacity += BUFFER_SIZE;
629
buffer_capacity = adjustbuffer(&buffer, buffer_length,
630
buffer_capacity);
631
if (buffer_capacity == 0){
632
perror("adjustbuffer");
633
retval = -1;
634
goto mandos_end;
453
635
}
454
636
455
ret = gnutls_record_recv
456
(es.session, buffer+buffer_length, BUFFER_SIZE);
637
ret = gnutls_record_recv(session, buffer+buffer_length,
638
BUFFER_SIZE);
457
639
if (ret == 0){
458
640
break;
459
641
}
463
645
case GNUTLS_E_AGAIN:
464
646
break;
465
647
case GNUTLS_E_REHANDSHAKE:
466
ret = gnutls_handshake (es.session);
648
do{
649
ret = gnutls_handshake (session);
650
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
467
651
if (ret < 0){
468
fprintf(stderr, "\n*** Handshake failed ***\n");
652
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
469
653
gnutls_perror (ret);
470
654
retval = -1;
471
goto exit;
655
goto mandos_end;
472
656
}
473
657
break;
474
658
default:
475
659
fprintf(stderr, "Unknown error while reading data from"
476
" encrypted session with mandos server\n");
660
" encrypted session with Mandos server\n");
477
661
retval = -1;
478
gnutls_bye (es.session, GNUTLS_SHUT_RDWR);
479
goto exit;
662
gnutls_bye (session, GNUTLS_SHUT_RDWR);
663
goto mandos_end;
480
664
}
481
665
} else {
482
666
buffer_length += (size_t) ret;
483
667
}
484
668
}
485
669
670
if(debug){
671
fprintf(stderr, "Closing TLS session\n");
672
}
673
674
gnutls_bye (session, GNUTLS_SHUT_RDWR);
675
486
676
if (buffer_length > 0){
487
decrypted_buffer_size = pgp_packet_decrypt(buffer,
677
decrypted_buffer_size = pgp_packet_decrypt(mc, buffer,
488
678
buffer_length,
489
&decrypted_buffer,
490
certdir);
679
&decrypted_buffer);
491
680
if (decrypted_buffer_size >= 0){
492
while(written < (size_t)decrypted_buffer_size){
681
written = 0;
682
while(written < (size_t) decrypted_buffer_size){
493
683
ret = (int)fwrite (decrypted_buffer + written, 1,
494
684
(size_t)decrypted_buffer_size - written,
495
685
stdout);
507
697
} else {
508
698
retval = -1;
509
699
}
510
}
511
512
//shutdown procedure
513
514
if(debug){
515
fprintf(stderr, "Closing TLS session\n");
516
}
517
700
} else {
701
retval = -1;
702
}
703
704
/* Shutdown procedure */
705
706
mandos_end:
518
707
free(buffer);
519
gnutls_bye (es.session, GNUTLS_SHUT_RDWR);
520
exit:
521
close(tcp_sd);
522
gnutls_deinit (es.session);
523
gnutls_certificate_free_credentials (es.cred);
524
gnutls_global_deinit ();
708
ret = TEMP_FAILURE_RETRY(close(tcp_sd));
709
if(ret == -1){
710
perror("close");
711
}
712
gnutls_deinit (session);
525
713
return retval;
526
714
}
527
715
528
static AvahiSimplePoll *simple_poll = NULL;
529
static AvahiServer *server = NULL;
530
531
static void resolve_callback(
532
AvahiSServiceResolver *r,
533
AvahiIfIndex interface,
534
AVAHI_GCC_UNUSED AvahiProtocol protocol,
535
AvahiResolverEvent event,
536
const char *name,
537
const char *type,
538
const char *domain,
539
const char *host_name,
540
const AvahiAddress *address,
541
uint16_t port,
542
AVAHI_GCC_UNUSED AvahiStringList *txt,
543
AVAHI_GCC_UNUSED AvahiLookupResultFlags flags,
544
AVAHI_GCC_UNUSED void* userdata) {
545
546
assert(r); /* Spurious warning */
716
static void resolve_callback(AvahiSServiceResolver *r,
717
AvahiIfIndex interface,
718
AVAHI_GCC_UNUSED AvahiProtocol protocol,
719
AvahiResolverEvent event,
720
const char *name,
721
const char *type,
722
const char *domain,
723
const char *host_name,
724
const AvahiAddress *address,
725
uint16_t port,
726
AVAHI_GCC_UNUSED AvahiStringList *txt,
727
AVAHI_GCC_UNUSED AvahiLookupResultFlags
728
flags,
729
void* userdata) {
730
mandos_context *mc = userdata;
731
assert(r);
547
732
548
733
/* Called whenever a service has been resolved successfully or
549
734
timed out */
551
736
switch (event) {
552
737
default:
553
738
case AVAHI_RESOLVER_FAILURE:
554
fprintf(stderr, "(Resolver) Failed to resolve service '%s' of"
555
" type '%s' in domain '%s': %s\n", name, type, domain,
556
avahi_strerror(avahi_server_errno(server)));
739
fprintf(stderr, "(Avahi Resolver) Failed to resolve service '%s'"
740
" of type '%s' in domain '%s': %s\n", name, type, domain,
741
avahi_strerror(avahi_server_errno(mc->server)));
557
742
break;
558
743
559
744
case AVAHI_RESOLVER_FOUND:
561
746
char ip[AVAHI_ADDRESS_STR_MAX];
562
747
avahi_address_snprint(ip, sizeof(ip), address);
563
748
if(debug){
564
fprintf(stderr, "Mandos server \"%s\" found on %s (%s) on"
565
" port %d\n", name, host_name, ip, port);
749
fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %"
750
PRIu16 ") on port %d\n", name, host_name, ip,
751
interface, port);
566
752
}
567
int ret = start_mandos_communication(ip, port,
568
(unsigned int) interface);
753
int ret = start_mandos_communication(ip, port, interface, mc);
569
754
if (ret == 0){
570
exit(EXIT_SUCCESS);
755
avahi_simple_poll_quit(mc->simple_poll);
571
756
}
572
757
}
573
758
}
574
759
avahi_s_service_resolver_free(r);
575
760
}
576
761
577
static void browse_callback(
578
AvahiSServiceBrowser *b,
579
AvahiIfIndex interface,
580
AvahiProtocol protocol,
581
AvahiBrowserEvent event,
582
const char *name,
583
const char *type,
584
const char *domain,
585
AVAHI_GCC_UNUSED AvahiLookupResultFlags flags,
586
void* userdata) {
587
588
AvahiServer *s = userdata;
589
assert(b); /* Spurious warning */
590
591
/* Called whenever a new services becomes available on the LAN or
592
is removed from the LAN */
593
594
switch (event) {
595
default:
596
case AVAHI_BROWSER_FAILURE:
597
598
fprintf(stderr, "(Browser) %s\n",
599
avahi_strerror(avahi_server_errno(server)));
600
avahi_simple_poll_quit(simple_poll);
601
return;
602
603
case AVAHI_BROWSER_NEW:
604
/* We ignore the returned resolver object. In the callback
605
function we free it. If the server is terminated before
606
the callback function is called the server will free
607
the resolver for us. */
608
609
if (!(avahi_s_service_resolver_new(s, interface, protocol, name,
610
type, domain,
611
AVAHI_PROTO_INET6, 0,
612
resolve_callback, s)))
613
fprintf(stderr, "Failed to resolve service '%s': %s\n", name,
614
avahi_strerror(avahi_server_errno(s)));
615
break;
616
617
case AVAHI_BROWSER_REMOVE:
618
break;
619
620
case AVAHI_BROWSER_ALL_FOR_NOW:
621
case AVAHI_BROWSER_CACHE_EXHAUSTED:
622
break;
762
static void browse_callback( AvahiSServiceBrowser *b,
763
AvahiIfIndex interface,
764
AvahiProtocol protocol,
765
AvahiBrowserEvent event,
766
const char *name,
767
const char *type,
768
const char *domain,
769
AVAHI_GCC_UNUSED AvahiLookupResultFlags
770
flags,
771
void* userdata) {
772
mandos_context *mc = userdata;
773
assert(b);
774
775
/* Called whenever a new services becomes available on the LAN or
776
is removed from the LAN */
777
778
switch (event) {
779
default:
780
case AVAHI_BROWSER_FAILURE:
781
782
fprintf(stderr, "(Avahi browser) %s\n",
783
avahi_strerror(avahi_server_errno(mc->server)));
784
avahi_simple_poll_quit(mc->simple_poll);
785
return;
786
787
case AVAHI_BROWSER_NEW:
788
/* We ignore the returned Avahi resolver object. In the callback
789
function we free it. If the Avahi server is terminated before
790
the callback function is called the Avahi server will free the
791
resolver for us. */
792
793
if (!(avahi_s_service_resolver_new(mc->server, interface,
794
protocol, name, type, domain,
795
AVAHI_PROTO_INET6, 0,
796
resolve_callback, mc)))
797
fprintf(stderr, "Avahi: Failed to resolve service '%s': %s\n",
798
name, avahi_strerror(avahi_server_errno(mc->server)));
799
break;
800
801
case AVAHI_BROWSER_REMOVE:
802
break;
803
804
case AVAHI_BROWSER_ALL_FOR_NOW:
805
case AVAHI_BROWSER_CACHE_EXHAUSTED:
806
if(debug){
807
fprintf(stderr, "No Mandos server found, still searching...\n");
623
808
}
624
}
625
626
/* combinds file name and path and returns the malloced new string. som sane checks could/should be added */
627
const char *combinepath(const char *first, const char *second){
628
char *tmp;
629
tmp = malloc(strlen(first) + strlen(second) + 2);
630
if (tmp == NULL){
631
perror("malloc");
632
return NULL;
633
}
634
strcpy(tmp, first);
635
if (first[0] != '\0' and first[strlen(first) - 1] != '/'){
636
strcat(tmp, "/");
637
}
638
strcat(tmp, second);
639
return tmp;
640
}
641
642
643
int main(AVAHI_GCC_UNUSED int argc, AVAHI_GCC_UNUSED char*argv[]) {
644
AvahiServerConfig config;
809
break;
810
}
811
}
812
813
int main(int argc, char *argv[]){
645
814
AvahiSServiceBrowser *sb = NULL;
646
815
int error;
647
816
int ret;
648
int returncode = EXIT_SUCCESS;
817
int exitcode = EXIT_SUCCESS;
649
818
const char *interface = "eth0";
650
819
struct ifreq network;
651
820
int sd;
652
653
while (true){
654
static struct option long_options[] = {
655
{"debug", no_argument, (int *)&debug, 1},
656
{"interface", required_argument, 0, 'i'},
657
{"certdir", required_argument, 0, 'd'},
658
{"certkey", required_argument, 0, 'c'},
659
{"certfile", required_argument, 0, 'k'},
660
{0, 0, 0, 0} };
661
662
int option_index = 0;
663
ret = getopt_long (argc, argv, "i:", long_options,
664
&option_index);
665
666
if (ret == -1){
667
break;
668
}
669
670
switch(ret){
671
case 0:
672
break;
673
case 'i':
674
interface = optarg;
675
break;
676
case 'd':
677
certdir = optarg;
678
break;
679
case 'c':
680
certfile = optarg;
681
break;
682
case 'k':
683
certkey = optarg;
684
break;
685
default:
686
exit(EXIT_FAILURE);
687
}
688
}
689
690
certfile = combinepath(certdir, certfile);
691
if (certfile == NULL){
692
returncode = EXIT_FAILURE;
693
goto exit;
694
}
695
696
certkey = combinepath(certdir, certkey);
697
if (certkey == NULL){
698
returncode = EXIT_FAILURE;
699
goto exit;
700
}
701
702
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
703
if(sd < 0) {
704
perror("socket");
705
returncode = EXIT_FAILURE;
706
goto exit;
707
}
708
strcpy(network.ifr_name, interface);
709
ret = ioctl(sd, SIOCGIFFLAGS, &network);
710
if(ret == -1){
711
712
perror("ioctl SIOCGIFFLAGS");
713
returncode = EXIT_FAILURE;
714
goto exit;
715
}
716
if((network.ifr_flags & IFF_UP) == 0){
717
network.ifr_flags |= IFF_UP;
718
ret = ioctl(sd, SIOCSIFFLAGS, &network);
719
if(ret == -1){
720
perror("ioctl SIOCSIFFLAGS");
721
returncode = EXIT_FAILURE;
722
goto exit;
723
}
724
}
725
close(sd);
821
uid_t uid;
822
gid_t gid;
823
char *connect_to = NULL;
824
char tempdir[] = "/tmp/mandosXXXXXX";
825
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
826
const char *seckey = PATHDIR "/" SECKEY;
827
const char *pubkey = PATHDIR "/" PUBKEY;
828
829
mandos_context mc = { .simple_poll = NULL, .server = NULL,
830
.dh_bits = 1024, .priority = "SECURE256"
831
":!CTYPE-X.509:+CTYPE-OPENPGP" };
832
bool gnutls_initalized = false;
833
bool pgpme_initalized = false;
834
835
{
836
struct argp_option options[] = {
837
{ .name = "debug", .key = 128,
838
.doc = "Debug mode", .group = 3 },
839
{ .name = "connect", .key = 'c',
840
.arg = "ADDRESS:PORT",
841
.doc = "Connect directly to a specific Mandos server",
842
.group = 1 },
843
{ .name = "interface", .key = 'i',
844
.arg = "NAME",
845
.doc = "Interface that will be used to search for Mandos"
846
" servers",
847
.group = 1 },
848
{ .name = "seckey", .key = 's',
849
.arg = "FILE",
850
.doc = "OpenPGP secret key file base name",
851
.group = 1 },
852
{ .name = "pubkey", .key = 'p',
853
.arg = "FILE",
854
.doc = "OpenPGP public key file base name",
855
.group = 2 },
856
{ .name = "dh-bits", .key = 129,
857
.arg = "BITS",
858
.doc = "Bit length of the prime number used in the"
859
" Diffie-Hellman key exchange",
860
.group = 2 },
861
{ .name = "priority", .key = 130,
862
.arg = "STRING",
863
.doc = "GnuTLS priority string for the TLS handshake",
864
.group = 1 },
865
{ .name = NULL }
866
};
867
868
error_t parse_opt (int key, char *arg,
869
struct argp_state *state) {
870
/* Get the INPUT argument from `argp_parse', which we know is
871
a pointer to our plugin list pointer. */
872
switch (key) {
873
case 128: /* --debug */
874
debug = true;
875
break;
876
case 'c': /* --connect */
877
connect_to = arg;
878
break;
879
case 'i': /* --interface */
880
interface = arg;
881
break;
882
case 's': /* --seckey */
883
seckey = arg;
884
break;
885
case 'p': /* --pubkey */
886
pubkey = arg;
887
break;
888
case 129: /* --dh-bits */
889
errno = 0;
890
mc.dh_bits = (unsigned int) strtol(arg, NULL, 10);
891
if (errno){
892
perror("strtol");
893
exit(EXIT_FAILURE);
894
}
895
break;
896
case 130: /* --priority */
897
mc.priority = arg;
898
break;
899
case ARGP_KEY_ARG:
900
argp_usage (state);
901
case ARGP_KEY_END:
902
break;
903
default:
904
return ARGP_ERR_UNKNOWN;
905
}
906
return 0;
907
}
908
909
struct argp argp = { .options = options, .parser = parse_opt,
910
.args_doc = "",
911
.doc = "Mandos client -- Get and decrypt"
912
" passwords from a Mandos server" };
913
ret = argp_parse (&argp, argc, argv, 0, 0, NULL);
914
if (ret == ARGP_ERR_UNKNOWN){
915
fprintf(stderr, "Unknown error while parsing arguments\n");
916
exitcode = EXIT_FAILURE;
917
goto end;
918
}
919
}
920
921
ret = init_gnutls_global(&mc, pubkey, seckey);
922
if (ret == -1){
923
fprintf(stderr, "init_gnutls_global failed\n");
924
exitcode = EXIT_FAILURE;
925
goto end;
926
} else {
927
gnutls_initalized = true;
928
}
929
930
if(mkdtemp(tempdir) == NULL){
931
perror("mkdtemp");
932
tempdir[0] = '\0';
933
goto end;
934
}
935
936
if(not init_gpgme(&mc, pubkey, seckey, tempdir)){
937
fprintf(stderr, "pgpme_initalized failed\n");
938
exitcode = EXIT_FAILURE;
939
goto end;
940
} else {
941
pgpme_initalized = true;
942
}
943
944
/* If the interface is down, bring it up */
945
{
946
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
947
if(sd < 0) {
948
perror("socket");
949
exitcode = EXIT_FAILURE;
950
goto end;
951
}
952
strcpy(network.ifr_name, interface);
953
ret = ioctl(sd, SIOCGIFFLAGS, &network);
954
if(ret == -1){
955
perror("ioctl SIOCGIFFLAGS");
956
exitcode = EXIT_FAILURE;
957
goto end;
958
}
959
if((network.ifr_flags & IFF_UP) == 0){
960
network.ifr_flags |= IFF_UP;
961
ret = ioctl(sd, SIOCSIFFLAGS, &network);
962
if(ret == -1){
963
perror("ioctl SIOCSIFFLAGS");
964
exitcode = EXIT_FAILURE;
965
goto end;
966
}
967
}
968
ret = TEMP_FAILURE_RETRY(close(sd));
969
if(ret == -1){
970
perror("close");
971
}
972
}
973
974
uid = getuid();
975
gid = getgid();
976
977
ret = setuid(uid);
978
if (ret == -1){
979
perror("setuid");
980
}
981
982
setgid(gid);
983
if (ret == -1){
984
perror("setgid");
985
}
986
987
if_index = (AvahiIfIndex) if_nametoindex(interface);
988
if(if_index == 0){
989
fprintf(stderr, "No such interface: \"%s\"\n", interface);
990
exit(EXIT_FAILURE);
991
}
992
993
if(connect_to != NULL){
994
/* Connect directly, do not use Zeroconf */
995
/* (Mainly meant for debugging) */
996
char *address = strrchr(connect_to, ':');
997
if(address == NULL){
998
fprintf(stderr, "No colon in address\n");
999
exitcode = EXIT_FAILURE;
1000
goto end;
1001
}
1002
errno = 0;
1003
uint16_t port = (uint16_t) strtol(address+1, NULL, 10);
1004
if(errno){
1005
perror("Bad port number");
1006
exitcode = EXIT_FAILURE;
1007
goto end;
1008
}
1009
*address = '\0';
1010
address = connect_to;
1011
ret = start_mandos_communication(address, port, if_index, &mc);
1012
if(ret < 0){
1013
exitcode = EXIT_FAILURE;
1014
} else {
1015
exitcode = EXIT_SUCCESS;
1016
}
1017
goto end;
1018
}
726
1019
727
1020
if (not debug){
728
1021
avahi_set_log_function(empty_log);
729
1022
}
730
1023
731
/* Initialize the psuedo-RNG */
1024
/* Initialize the pseudo-RNG for Avahi */
732
1025
srand((unsigned int) time(NULL));
733
734
/* Allocate main loop object */
735
if (!(simple_poll = avahi_simple_poll_new())) {
736
fprintf(stderr, "Failed to create simple poll object.\n");
737
returncode = EXIT_FAILURE;
738
goto exit;
739
}
740
741
/* Do not publish any local records */
742
avahi_server_config_init(&config);
743
config.publish_hinfo = 0;
744
config.publish_addresses = 0;
745
config.publish_workstation = 0;
746
config.publish_domain = 0;
747
748
/* Allocate a new server */
749
server = avahi_server_new(avahi_simple_poll_get(simple_poll),
750
&config, NULL, NULL, &error);
751
752
/* Free the configuration data */
753
avahi_server_config_free(&config);
754
755
/* Check if creating the server object succeeded */
756
if (!server) {
757
fprintf(stderr, "Failed to create server: %s\n",
1026
1027
/* Allocate main Avahi loop object */
1028
mc.simple_poll = avahi_simple_poll_new();
1029
if (mc.simple_poll == NULL) {
1030
fprintf(stderr, "Avahi: Failed to create simple poll"
1031
" object.\n");
1032
exitcode = EXIT_FAILURE;
1033
goto end;
1034
}
1035
1036
{
1037
AvahiServerConfig config;
1038
/* Do not publish any local Zeroconf records */
1039
avahi_server_config_init(&config);
1040
config.publish_hinfo = 0;
1041
config.publish_addresses = 0;
1042
config.publish_workstation = 0;
1043
config.publish_domain = 0;
1044
1045
/* Allocate a new server */
1046
mc.server = avahi_server_new(avahi_simple_poll_get
1047
(mc.simple_poll), &config, NULL,
1048
NULL, &error);
1049
1050
/* Free the Avahi configuration data */
1051
avahi_server_config_free(&config);
1052
}
1053
1054
/* Check if creating the Avahi server object succeeded */
1055
if (mc.server == NULL) {
1056
fprintf(stderr, "Failed to create Avahi server: %s\n",
758
1057
avahi_strerror(error));
759
returncode = EXIT_FAILURE;
760
goto exit;
1058
exitcode = EXIT_FAILURE;
1059
goto end;
761
1060
}
762
1061
763
/* Create the service browser */
764
sb = avahi_s_service_browser_new(server,
765
(AvahiIfIndex)
766
if_nametoindex(interface),
1062
/* Create the Avahi service browser */
1063
sb = avahi_s_service_browser_new(mc.server, if_index,
767
1064
AVAHI_PROTO_INET6,
768
1065
"_mandos._tcp", NULL, 0,
769
browse_callback, server);
770
if (!sb) {
1066
browse_callback, &mc);
1067
if (sb == NULL) {
771
1068
fprintf(stderr, "Failed to create service browser: %s\n",
772
avahi_strerror(avahi_server_errno(server)));
773
returncode = EXIT_FAILURE;
774
goto exit;
1069
avahi_strerror(avahi_server_errno(mc.server)));
1070
exitcode = EXIT_FAILURE;
1071
goto end;
775
1072
}
776
1073
777
1074
/* Run the main loop */
778
1075
779
1076
if (debug){
780
fprintf(stderr, "Starting avahi loop search\n");
1077
fprintf(stderr, "Starting Avahi loop search\n");
781
1078
}
782
1079
783
avahi_simple_poll_loop(simple_poll);
784
785
exit:
786
1080
avahi_simple_poll_loop(mc.simple_poll);
1081
1082
end:
1083
787
1084
if (debug){
788
1085
fprintf(stderr, "%s exiting\n", argv[0]);
789
1086
}
790
1087
791
1088
/* Cleanup things */
792
if (sb)
1089
if (sb != NULL)
793
1090
avahi_s_service_browser_free(sb);
794
1091
795
if (server)
796
avahi_server_free(server);
797
798
if (simple_poll)
799
avahi_simple_poll_free(simple_poll);
800
free(certfile);
801
free(certkey);
802
803
return returncode;
1092
if (mc.server != NULL)
1093
avahi_server_free(mc.server);
1094
1095
if (mc.simple_poll != NULL)
1096
avahi_simple_poll_free(mc.simple_poll);
1097
1098
if (gnutls_initalized){
1099
gnutls_certificate_free_credentials(mc.cred);
1100
gnutls_global_deinit ();
1101
}
1102
1103
if(pgpme_initalized){
1104
gpgme_release(mc.ctx);
1105
}
1106
1107
/* Removes the temp directory used by GPGME */
1108
if(tempdir[0] != '\0'){
1109
DIR *d;
1110
struct dirent *direntry;
1111
d = opendir(tempdir);
1112
if(d == NULL){
1113
perror("opendir");
1114
} else {
1115
while(true){
1116
direntry = readdir(d);
1117
if(direntry == NULL){
1118
break;
1119
}
1120
if (direntry->d_type == DT_REG){
1121
char *fullname = NULL;
1122
ret = asprintf(&fullname, "%s/%s", tempdir,
1123
direntry->d_name);
1124
if(ret < 0){
1125
perror("asprintf");
1126
continue;
1127
}
1128
ret = unlink(fullname);
1129
if(ret == -1){
1130
fprintf(stderr, "unlink(\"%s\"): %s",
1131
fullname, strerror(errno));
1132
}
1133
free(fullname);
1134
}
1135
}
1136
}
1137
ret = rmdir(tempdir);
1138
if(ret == -1){
1139
perror("rmdir");
1140
}
1141
}
1142
1143
return exitcode;
804
1144
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0