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- Committer: Teddy Hogeborn
- Date: 2008-10-18 11:17:22 UTC
- Revision ID: teddy@fukt.bsnet.se-20081018111722-jtbz35c031lxuuc9
* debian/mandos-client.docs (NEWS): Added.
* debian/mandos.docs (NEWS): - '' -
* debian/mandos.docs (NEWS): - '' -
- files added:
- .bzr-builddeb
- debian
- debian/po
- files removed:
- ca.pem
- files renamed:
- server.py => mandos
- server.conf => mandos.conf
- plugbasedclient.c => plugin-runner.c
- plugins.d/mandosclient.c => plugins.d/mandos-client.c
- plugins.d/passprompt.c => plugins.d/password-prompt.c
- files modified:
- Makefile
added
removed
plugins.d/mandos-client.c
9
9
* "browse_callback", and parts of "main".
10
10
*
11
11
* Everything else is
12
* Copyright © 2007-2008 Teddy Hogeborn & Björn Påhlsson
12
* Copyright © 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
32
32
#define _LARGEFILE_SOURCE
33
33
#define _FILE_OFFSET_BITS 64
34
34
35
#include <stdio.h>
36
#include <assert.h>
37
#include <stdlib.h>
38
#include <time.h>
39
#include <net/if.h> /* if_nametoindex */
40
#include <sys/ioctl.h> // ioctl, ifreq, SIOCGIFFLAGS, IFF_UP, SIOCSIFFLAGS
41
#include <net/if.h> // ioctl, ifreq, SIOCGIFFLAGS, IFF_UP, SIOCSIFFLAGS
42
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_* */
43
79
#include <avahi-core/core.h>
44
80
#include <avahi-core/lookup.h>
45
81
#include <avahi-core/log.h>
47
83
#include <avahi-common/malloc.h>
48
84
#include <avahi-common/error.h>
49
85
50
//mandos client part
51
#include <sys/types.h> /* socket(), inet_pton() */
52
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
53
struct in6_addr, inet_pton() */
54
#include <gnutls/gnutls.h> /* All GnuTLS stuff */
55
#include <gnutls/openpgp.h> /* GnuTLS with openpgp stuff */
56
57
#include <unistd.h> /* close() */
58
#include <netinet/in.h>
59
#include <stdbool.h> /* true */
60
#include <string.h> /* memset */
61
#include <arpa/inet.h> /* inet_pton() */
62
#include <iso646.h> /* not */
63
64
// gpgme
65
#include <errno.h> /* perror() */
66
#include <gpgme.h>
67
68
// getopt_long
69
#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_* */
70
101
71
102
#define BUFFER_SIZE 256
72
103
73
static const char *keydir = "/conf/conf.d/mandos";
74
static const char *pubkeyfile = "pubkey.txt";
75
static const char *seckeyfile = "seckey.txt";
104
#define PATHDIR "/conf/conf.d/mandos"
105
#define SECKEY "seckey.txt"
106
#define PUBKEY "pubkey.txt"
76
107
77
108
bool debug = false;
109
static const char mandos_protocol_version[] = "1";
110
const char *argp_program_version = "mandos-client " VERSION;
111
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
78
112
79
/* Used for passing in values through all the callback functions */
113
/* Used for passing in values through the Avahi callback functions */
80
114
typedef struct {
81
115
AvahiSimplePoll *simple_poll;
82
116
AvahiServer *server;
83
117
gnutls_certificate_credentials_t cred;
84
118
unsigned int dh_bits;
119
gnutls_dh_params_t dh_params;
85
120
const char *priority;
121
gpgme_ctx_t ctx;
86
122
} mandos_context;
87
123
88
static ssize_t pgp_packet_decrypt (char *packet, size_t packet_size,
89
char **new_packet,
90
const char *homedir){
91
gpgme_data_t dh_crypto, dh_plain;
92
gpgme_ctx_t ctx;
124
/*
125
* Make room in "buffer" for at least BUFFER_SIZE additional bytes.
126
* "buffer_capacity" is how much is currently allocated,
127
* "buffer_length" is how much is already used.
128
*/
129
size_t adjustbuffer(char **buffer, size_t buffer_length,
130
size_t buffer_capacity){
131
if (buffer_length + BUFFER_SIZE > buffer_capacity){
132
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
133
if (buffer == NULL){
134
return 0;
135
}
136
buffer_capacity += BUFFER_SIZE;
137
}
138
return buffer_capacity;
139
}
140
141
/*
142
* Initialize GPGME.
143
*/
144
static bool init_gpgme(mandos_context *mc, const char *seckey,
145
const char *pubkey, const char *tempdir){
146
int ret;
93
147
gpgme_error_t rc;
94
ssize_t ret;
95
ssize_t new_packet_capacity = 0;
96
ssize_t new_packet_length = 0;
97
148
gpgme_engine_info_t engine_info;
98
149
150
151
/*
152
* Helper function to insert pub and seckey to the enigne keyring.
153
*/
154
bool import_key(const char *filename){
155
int fd;
156
gpgme_data_t pgp_data;
157
158
fd = TEMP_FAILURE_RETRY(open(filename, O_RDONLY));
159
if(fd == -1){
160
perror("open");
161
return false;
162
}
163
164
rc = gpgme_data_new_from_fd(&pgp_data, fd);
165
if (rc != GPG_ERR_NO_ERROR){
166
fprintf(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
167
gpgme_strsource(rc), gpgme_strerror(rc));
168
return false;
169
}
170
171
rc = gpgme_op_import(mc->ctx, pgp_data);
172
if (rc != GPG_ERR_NO_ERROR){
173
fprintf(stderr, "bad gpgme_op_import: %s: %s\n",
174
gpgme_strsource(rc), gpgme_strerror(rc));
175
return false;
176
}
177
178
ret = TEMP_FAILURE_RETRY(close(fd));
179
if(ret == -1){
180
perror("close");
181
}
182
gpgme_data_release(pgp_data);
183
return true;
184
}
185
99
186
if (debug){
100
fprintf(stderr, "Trying to decrypt OpenPGP packet\n");
187
fprintf(stderr, "Initialize gpgme\n");
101
188
}
102
189
103
190
/* Init GPGME */
106
193
if (rc != GPG_ERR_NO_ERROR){
107
194
fprintf(stderr, "bad gpgme_engine_check_version: %s: %s\n",
108
195
gpgme_strsource(rc), gpgme_strerror(rc));
109
return -1;
196
return false;
110
197
}
111
198
112
/* Set GPGME home directory */
199
/* Set GPGME home directory for the OpenPGP engine only */
113
200
rc = gpgme_get_engine_info (&engine_info);
114
201
if (rc != GPG_ERR_NO_ERROR){
115
202
fprintf(stderr, "bad gpgme_get_engine_info: %s: %s\n",
116
203
gpgme_strsource(rc), gpgme_strerror(rc));
117
return -1;
204
return false;
118
205
}
119
206
while(engine_info != NULL){
120
207
if(engine_info->protocol == GPGME_PROTOCOL_OpenPGP){
121
208
gpgme_set_engine_info(GPGME_PROTOCOL_OpenPGP,
122
engine_info->file_name, homedir);
209
engine_info->file_name, tempdir);
123
210
break;
124
211
}
125
212
engine_info = engine_info->next;
126
213
}
127
214
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);
215
fprintf(stderr, "Could not set GPGME home dir to %s\n", tempdir);
216
return false;
217
}
218
219
/* Create new GPGME "context" */
220
rc = gpgme_new(&(mc->ctx));
221
if (rc != GPG_ERR_NO_ERROR){
222
fprintf(stderr, "bad gpgme_new: %s: %s\n",
223
gpgme_strsource(rc), gpgme_strerror(rc));
224
return false;
225
}
226
227
if (not import_key(pubkey) or not import_key(seckey)){
228
return false;
229
}
230
231
return true;
232
}
233
234
/*
235
* Decrypt OpenPGP data.
236
* Returns -1 on error
237
*/
238
static ssize_t pgp_packet_decrypt (const mandos_context *mc,
239
const char *cryptotext,
240
size_t crypto_size,
241
char **plaintext){
242
gpgme_data_t dh_crypto, dh_plain;
243
gpgme_error_t rc;
244
ssize_t ret;
245
size_t plaintext_capacity = 0;
246
ssize_t plaintext_length = 0;
247
248
if (debug){
249
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
250
}
251
252
/* Create new GPGME data buffer from memory cryptotext */
253
rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,
254
0);
134
255
if (rc != GPG_ERR_NO_ERROR){
135
256
fprintf(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
136
257
gpgme_strsource(rc), gpgme_strerror(rc));
142
263
if (rc != GPG_ERR_NO_ERROR){
143
264
fprintf(stderr, "bad gpgme_data_new: %s: %s\n",
144
265
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);
266
gpgme_data_release(dh_crypto);
267
return -1;
268
}
269
270
/* Decrypt data from the cryptotext data buffer to the plaintext
271
data buffer */
272
rc = gpgme_op_decrypt(mc->ctx, dh_crypto, dh_plain);
159
273
if (rc != GPG_ERR_NO_ERROR){
160
274
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
161
275
gpgme_strsource(rc), gpgme_strerror(rc));
162
return -1;
276
plaintext_length = -1;
277
if (debug){
278
gpgme_decrypt_result_t result;
279
result = gpgme_op_decrypt_result(mc->ctx);
280
if (result == NULL){
281
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
282
} else {
283
fprintf(stderr, "Unsupported algorithm: %s\n",
284
result->unsupported_algorithm);
285
fprintf(stderr, "Wrong key usage: %u\n",
286
result->wrong_key_usage);
287
if(result->file_name != NULL){
288
fprintf(stderr, "File name: %s\n", result->file_name);
289
}
290
gpgme_recipient_t recipient;
291
recipient = result->recipients;
292
if(recipient){
293
while(recipient != NULL){
294
fprintf(stderr, "Public key algorithm: %s\n",
295
gpgme_pubkey_algo_name(recipient->pubkey_algo));
296
fprintf(stderr, "Key ID: %s\n", recipient->keyid);
297
fprintf(stderr, "Secret key available: %s\n",
298
recipient->status == GPG_ERR_NO_SECKEY
299
? "No" : "Yes");
300
recipient = recipient->next;
301
}
302
}
303
}
304
}
305
goto decrypt_end;
163
306
}
164
307
165
308
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);
309
fprintf(stderr, "Decryption of OpenPGP data succeeded\n");
310
}
200
311
201
312
/* Seek back to the beginning of the GPGME plaintext data buffer */
202
313
if (gpgme_data_seek(dh_plain, (off_t) 0, SEEK_SET) == -1){
203
perror("pgpme_data_seek");
314
perror("gpgme_data_seek");
315
plaintext_length = -1;
316
goto decrypt_end;
204
317
}
205
318
206
*new_packet = 0;
319
*plaintext = NULL;
207
320
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;
321
plaintext_capacity = adjustbuffer(plaintext,
322
(size_t)plaintext_length,
323
plaintext_capacity);
324
if (plaintext_capacity == 0){
325
perror("adjustbuffer");
326
plaintext_length = -1;
327
goto decrypt_end;
217
328
}
218
329
219
ret = gpgme_data_read(dh_plain, *new_packet + new_packet_length,
330
ret = gpgme_data_read(dh_plain, *plaintext + plaintext_length,
220
331
BUFFER_SIZE);
221
332
/* Print the data, if any */
222
333
if (ret == 0){
334
/* EOF */
223
335
break;
224
336
}
225
337
if(ret < 0){
226
338
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
/* } */
339
plaintext_length = -1;
340
goto decrypt_end;
341
}
342
plaintext_length += ret;
343
}
344
345
if(debug){
346
fprintf(stderr, "Decrypted password is: ");
347
for(ssize_t i = 0; i < plaintext_length; i++){
348
fprintf(stderr, "%02hhX ", (*plaintext)[i]);
349
}
350
fprintf(stderr, "\n");
351
}
352
353
decrypt_end:
354
355
/* Delete the GPGME cryptotext data buffer */
356
gpgme_data_release(dh_crypto);
239
357
240
358
/* Delete the GPGME plaintext data buffer */
241
359
gpgme_data_release(dh_plain);
242
return new_packet_length;
360
return plaintext_length;
243
361
}
244
362
245
363
static const char * safer_gnutls_strerror (int value) {
246
const char *ret = gnutls_strerror (value);
364
const char *ret = gnutls_strerror (value); /* Spurious warning */
247
365
if (ret == NULL)
248
366
ret = "(unknown)";
249
367
return ret;
250
368
}
251
369
370
/* GnuTLS log function callback */
252
371
static void debuggnutls(__attribute__((unused)) int level,
253
372
const char* string){
254
fprintf(stderr, "%s", string);
373
fprintf(stderr, "GnuTLS: %s", string);
255
374
}
256
375
257
static int initgnutls(mandos_context *mc, gnutls_session_t *session,
258
gnutls_dh_params_t *dh_params){
259
const char *err;
376
static int init_gnutls_global(mandos_context *mc,
377
const char *pubkeyfilename,
378
const char *seckeyfilename){
260
379
int ret;
261
380
262
381
if(debug){
263
382
fprintf(stderr, "Initializing GnuTLS\n");
264
383
}
265
266
if ((ret = gnutls_global_init ())
267
!= GNUTLS_E_SUCCESS) {
268
fprintf (stderr, "global_init: %s\n", safer_gnutls_strerror(ret));
384
385
ret = gnutls_global_init();
386
if (ret != GNUTLS_E_SUCCESS) {
387
fprintf (stderr, "GnuTLS global_init: %s\n",
388
safer_gnutls_strerror(ret));
269
389
return -1;
270
390
}
271
391
272
392
if (debug){
393
/* "Use a log level over 10 to enable all debugging options."
394
* - GnuTLS manual
395
*/
273
396
gnutls_global_set_log_level(11);
274
397
gnutls_global_set_log_function(debuggnutls);
275
398
}
276
399
277
/* openpgp credentials */
278
if ((ret = gnutls_certificate_allocate_credentials (&mc->cred))
279
!= GNUTLS_E_SUCCESS) {
280
fprintf (stderr, "memory error: %s\n",
400
/* OpenPGP credentials */
401
gnutls_certificate_allocate_credentials(&mc->cred);
402
if (ret != GNUTLS_E_SUCCESS){
403
fprintf (stderr, "GnuTLS memory error: %s\n", /* Spurious
404
warning */
281
405
safer_gnutls_strerror(ret));
406
gnutls_global_deinit ();
282
407
return -1;
283
408
}
284
409
285
410
if(debug){
286
fprintf(stderr, "Attempting to use OpenPGP certificate %s"
287
" and keyfile %s as GnuTLS credentials\n", pubkeyfile,
288
seckeyfile);
411
fprintf(stderr, "Attempting to use OpenPGP public key %s and"
412
" secret key %s as GnuTLS credentials\n", pubkeyfilename,
413
seckeyfilename);
289
414
}
290
415
291
416
ret = gnutls_certificate_set_openpgp_key_file
292
(mc->cred, pubkeyfile, seckeyfile, GNUTLS_OPENPGP_FMT_BASE64);
417
(mc->cred, pubkeyfilename, seckeyfilename,
418
GNUTLS_OPENPGP_FMT_BASE64);
293
419
if (ret != GNUTLS_E_SUCCESS) {
294
fprintf
295
(stderr, "Error[%d] while reading the OpenPGP key pair ('%s',"
296
" '%s')\n",
297
ret, pubkeyfile, seckeyfile);
298
fprintf(stdout, "The Error is: %s\n",
420
fprintf(stderr,
421
"Error[%d] while reading the OpenPGP key pair ('%s',"
422
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
423
fprintf(stderr, "The GnuTLS error is: %s\n",
299
424
safer_gnutls_strerror(ret));
300
return -1;
301
}
302
303
//GnuTLS server initialization
304
if ((ret = gnutls_dh_params_init(dh_params))
305
!= GNUTLS_E_SUCCESS) {
306
fprintf (stderr, "Error in dh parameter initialization: %s\n",
307
safer_gnutls_strerror(ret));
308
return -1;
309
}
310
311
if ((ret = gnutls_dh_params_generate2(*dh_params, mc->dh_bits))
312
!= GNUTLS_E_SUCCESS) {
313
fprintf (stderr, "Error in prime generation: %s\n",
314
safer_gnutls_strerror(ret));
315
return -1;
316
}
317
318
gnutls_certificate_set_dh_params(mc->cred, *dh_params);
319
320
// GnuTLS session creation
321
if ((ret = gnutls_init(session, GNUTLS_SERVER))
322
!= GNUTLS_E_SUCCESS){
425
goto globalfail;
426
}
427
428
/* GnuTLS server initialization */
429
ret = gnutls_dh_params_init(&mc->dh_params);
430
if (ret != GNUTLS_E_SUCCESS) {
431
fprintf (stderr, "Error in GnuTLS DH parameter initialization:"
432
" %s\n", safer_gnutls_strerror(ret));
433
goto globalfail;
434
}
435
ret = gnutls_dh_params_generate2(mc->dh_params, mc->dh_bits);
436
if (ret != GNUTLS_E_SUCCESS) {
437
fprintf (stderr, "Error in GnuTLS prime generation: %s\n",
438
safer_gnutls_strerror(ret));
439
goto globalfail;
440
}
441
442
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
443
444
return 0;
445
446
globalfail:
447
448
gnutls_certificate_free_credentials(mc->cred);
449
gnutls_global_deinit();
450
gnutls_dh_params_deinit(mc->dh_params);
451
return -1;
452
}
453
454
static int init_gnutls_session(mandos_context *mc,
455
gnutls_session_t *session){
456
int ret;
457
/* GnuTLS session creation */
458
ret = gnutls_init(session, GNUTLS_SERVER);
459
if (ret != GNUTLS_E_SUCCESS){
323
460
fprintf(stderr, "Error in GnuTLS session initialization: %s\n",
324
461
safer_gnutls_strerror(ret));
325
462
}
326
463
327
if ((ret = gnutls_priority_set_direct(*session, mc->priority, &err))
328
!= GNUTLS_E_SUCCESS) {
329
fprintf(stderr, "Syntax error at: %s\n", err);
330
fprintf(stderr, "GnuTLS error: %s\n",
331
safer_gnutls_strerror(ret));
332
return -1;
464
{
465
const char *err;
466
ret = gnutls_priority_set_direct(*session, mc->priority, &err);
467
if (ret != GNUTLS_E_SUCCESS) {
468
fprintf(stderr, "Syntax error at: %s\n", err);
469
fprintf(stderr, "GnuTLS error: %s\n",
470
safer_gnutls_strerror(ret));
471
gnutls_deinit (*session);
472
return -1;
473
}
333
474
}
334
475
335
if ((ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,
336
mc->cred))
337
!= GNUTLS_E_SUCCESS) {
338
fprintf(stderr, "Error setting a credentials set: %s\n",
476
ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,
477
mc->cred);
478
if (ret != GNUTLS_E_SUCCESS) {
479
fprintf(stderr, "Error setting GnuTLS credentials: %s\n",
339
480
safer_gnutls_strerror(ret));
481
gnutls_deinit (*session);
340
482
return -1;
341
483
}
342
484
349
491
return 0;
350
492
}
351
493
494
/* Avahi log function callback */
352
495
static void empty_log(__attribute__((unused)) AvahiLogLevel level,
353
496
__attribute__((unused)) const char *txt){}
354
497
498
/* Called when a Mandos server is found */
355
499
static int start_mandos_communication(const char *ip, uint16_t port,
356
500
AvahiIfIndex if_index,
357
501
mandos_context *mc){
358
502
int ret, tcp_sd;
359
struct sockaddr_in6 to;
503
union { struct sockaddr in; struct sockaddr_in6 in6; } to;
360
504
char *buffer = NULL;
361
505
char *decrypted_buffer;
362
506
size_t buffer_length = 0;
363
507
size_t buffer_capacity = 0;
364
508
ssize_t decrypted_buffer_size;
365
size_t written = 0;
509
size_t written;
366
510
int retval = 0;
367
511
char interface[IF_NAMESIZE];
368
512
gnutls_session_t session;
369
gnutls_dh_params_t dh_params;
513
514
ret = init_gnutls_session (mc, &session);
515
if (ret != 0){
516
return -1;
517
}
370
518
371
519
if(debug){
372
fprintf(stderr, "Setting up a tcp connection to %s, port %d\n",
373
ip, port);
520
fprintf(stderr, "Setting up a tcp connection to %s, port %" PRIu16
521
"\n", ip, port);
374
522
}
375
523
376
524
tcp_sd = socket(PF_INET6, SOCK_STREAM, 0);
378
526
perror("socket");
379
527
return -1;
380
528
}
381
529
382
530
if(debug){
383
531
if(if_indextoname((unsigned int)if_index, interface) == NULL){
384
532
perror("if_indextoname");
387
535
fprintf(stderr, "Binding to interface %s\n", interface);
388
536
}
389
537
390
memset(&to,0,sizeof(to)); /* Spurious warning */
391
to.sin6_family = AF_INET6;
392
ret = inet_pton(AF_INET6, ip, &to.sin6_addr);
538
memset(&to, 0, sizeof(to));
539
to.in6.sin6_family = AF_INET6;
540
/* It would be nice to have a way to detect if we were passed an
541
IPv4 address here. Now we assume an IPv6 address. */
542
ret = inet_pton(AF_INET6, ip, &to.in6.sin6_addr);
393
543
if (ret < 0 ){
394
544
perror("inet_pton");
395
545
return -1;
398
548
fprintf(stderr, "Bad address: %s\n", ip);
399
549
return -1;
400
550
}
401
to.sin6_port = htons(port); /* Spurious warning */
551
to.in6.sin6_port = htons(port); /* Spurious warning */
402
552
403
to.sin6_scope_id = (uint32_t)if_index;
553
to.in6.sin6_scope_id = (uint32_t)if_index;
404
554
405
555
if(debug){
406
fprintf(stderr, "Connection to: %s, port %d\n", ip, port);
556
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
557
port);
407
558
char addrstr[INET6_ADDRSTRLEN] = "";
408
if(inet_ntop(to.sin6_family, &(to.sin6_addr), addrstr,
559
if(inet_ntop(to.in6.sin6_family, &(to.in6.sin6_addr), addrstr,
409
560
sizeof(addrstr)) == NULL){
410
561
perror("inet_ntop");
411
562
} else {
415
566
}
416
567
}
417
568
418
ret = connect(tcp_sd, (struct sockaddr *) &to, sizeof(to));
569
ret = connect(tcp_sd, &to.in, sizeof(to));
419
570
if (ret < 0){
420
571
perror("connect");
421
572
return -1;
422
573
}
423
574
424
ret = initgnutls (mc, &session, &dh_params);
425
if (ret != 0){
426
retval = -1;
427
return -1;
575
const char *out = mandos_protocol_version;
576
written = 0;
577
while (true){
578
size_t out_size = strlen(out);
579
ret = TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
580
out_size - written));
581
if (ret == -1){
582
perror("write");
583
retval = -1;
584
goto mandos_end;
585
}
586
written += (size_t)ret;
587
if(written < out_size){
588
continue;
589
} else {
590
if (out == mandos_protocol_version){
591
written = 0;
592
out = "\r\n";
593
} else {
594
break;
595
}
596
}
597
}
598
599
if(debug){
600
fprintf(stderr, "Establishing TLS session with %s\n", ip);
428
601
}
429
602
430
603
gnutls_transport_set_ptr (session, (gnutls_transport_ptr_t) tcp_sd);
431
604
432
if(debug){
433
fprintf(stderr, "Establishing TLS session with %s\n", ip);
434
}
435
436
ret = gnutls_handshake (session);
605
do{
606
ret = gnutls_handshake (session);
607
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
437
608
438
609
if (ret != GNUTLS_E_SUCCESS){
439
610
if(debug){
440
fprintf(stderr, "\n*** Handshake failed ***\n");
611
fprintf(stderr, "*** GnuTLS Handshake failed ***\n");
441
612
gnutls_perror (ret);
442
613
}
443
614
retval = -1;
444
goto exit;
615
goto mandos_end;
445
616
}
446
617
447
//Retrieve OpenPGP packet that contains the wanted password
618
/* Read OpenPGP packet that contains the wanted password */
448
619
449
620
if(debug){
450
621
fprintf(stderr, "Retrieving pgp encrypted password from %s\n",
451
622
ip);
452
623
}
453
624
454
625
while(true){
455
if (buffer_length + BUFFER_SIZE > buffer_capacity){
456
buffer = realloc(buffer, buffer_capacity + BUFFER_SIZE);
457
if (buffer == NULL){
458
perror("realloc");
459
goto exit;
460
}
461
buffer_capacity += BUFFER_SIZE;
626
buffer_capacity = adjustbuffer(&buffer, buffer_length,
627
buffer_capacity);
628
if (buffer_capacity == 0){
629
perror("adjustbuffer");
630
retval = -1;
631
goto mandos_end;
462
632
}
463
633
464
634
ret = gnutls_record_recv(session, buffer+buffer_length,
472
642
case GNUTLS_E_AGAIN:
473
643
break;
474
644
case GNUTLS_E_REHANDSHAKE:
475
ret = gnutls_handshake (session);
645
do{
646
ret = gnutls_handshake (session);
647
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
476
648
if (ret < 0){
477
fprintf(stderr, "\n*** Handshake failed ***\n");
649
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
478
650
gnutls_perror (ret);
479
651
retval = -1;
480
goto exit;
652
goto mandos_end;
481
653
}
482
654
break;
483
655
default:
484
656
fprintf(stderr, "Unknown error while reading data from"
485
" encrypted session with mandos server\n");
657
" encrypted session with Mandos server\n");
486
658
retval = -1;
487
659
gnutls_bye (session, GNUTLS_SHUT_RDWR);
488
goto exit;
660
goto mandos_end;
489
661
}
490
662
} else {
491
663
buffer_length += (size_t) ret;
492
664
}
493
665
}
494
666
667
if(debug){
668
fprintf(stderr, "Closing TLS session\n");
669
}
670
671
gnutls_bye (session, GNUTLS_SHUT_RDWR);
672
495
673
if (buffer_length > 0){
496
decrypted_buffer_size = pgp_packet_decrypt(buffer,
674
decrypted_buffer_size = pgp_packet_decrypt(mc, buffer,
497
675
buffer_length,
498
&decrypted_buffer,
499
keydir);
676
&decrypted_buffer);
500
677
if (decrypted_buffer_size >= 0){
678
written = 0;
501
679
while(written < (size_t) decrypted_buffer_size){
502
680
ret = (int)fwrite (decrypted_buffer + written, 1,
503
681
(size_t)decrypted_buffer_size - written,
516
694
} else {
517
695
retval = -1;
518
696
}
519
}
520
521
//shutdown procedure
522
523
if(debug){
524
fprintf(stderr, "Closing TLS session\n");
525
}
526
697
} else {
698
retval = -1;
699
}
700
701
/* Shutdown procedure */
702
703
mandos_end:
527
704
free(buffer);
528
gnutls_bye (session, GNUTLS_SHUT_RDWR);
529
exit:
530
close(tcp_sd);
705
ret = TEMP_FAILURE_RETRY(close(tcp_sd));
706
if(ret == -1){
707
perror("close");
708
}
531
709
gnutls_deinit (session);
532
gnutls_certificate_free_credentials (mc->cred);
533
gnutls_global_deinit ();
534
710
return retval;
535
711
}
536
712
537
static void resolve_callback( AvahiSServiceResolver *r,
538
AvahiIfIndex interface,
539
AVAHI_GCC_UNUSED AvahiProtocol protocol,
540
AvahiResolverEvent event,
541
const char *name,
542
const char *type,
543
const char *domain,
544
const char *host_name,
545
const AvahiAddress *address,
546
uint16_t port,
547
AVAHI_GCC_UNUSED AvahiStringList *txt,
548
AVAHI_GCC_UNUSED AvahiLookupResultFlags flags,
549
void* userdata) {
713
static void resolve_callback(AvahiSServiceResolver *r,
714
AvahiIfIndex interface,
715
AVAHI_GCC_UNUSED AvahiProtocol protocol,
716
AvahiResolverEvent event,
717
const char *name,
718
const char *type,
719
const char *domain,
720
const char *host_name,
721
const AvahiAddress *address,
722
uint16_t port,
723
AVAHI_GCC_UNUSED AvahiStringList *txt,
724
AVAHI_GCC_UNUSED AvahiLookupResultFlags
725
flags,
726
void* userdata) {
550
727
mandos_context *mc = userdata;
551
assert(r); /* Spurious warning */
728
assert(r);
552
729
553
730
/* Called whenever a service has been resolved successfully or
554
731
timed out */
556
733
switch (event) {
557
734
default:
558
735
case AVAHI_RESOLVER_FAILURE:
559
fprintf(stderr, "(Resolver) Failed to resolve service '%s' of"
560
" type '%s' in domain '%s': %s\n", name, type, domain,
736
fprintf(stderr, "(Avahi Resolver) Failed to resolve service '%s'"
737
" of type '%s' in domain '%s': %s\n", name, type, domain,
561
738
avahi_strerror(avahi_server_errno(mc->server)));
562
739
break;
563
740
566
743
char ip[AVAHI_ADDRESS_STR_MAX];
567
744
avahi_address_snprint(ip, sizeof(ip), address);
568
745
if(debug){
569
fprintf(stderr, "Mandos server \"%s\" found on %s (%s) on"
570
" port %d\n", name, host_name, ip, port);
746
fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %"
747
PRIu16 ") on port %d\n", name, host_name, ip,
748
interface, port);
571
749
}
572
750
int ret = start_mandos_communication(ip, port, interface, mc);
573
751
if (ret == 0){
574
exit(EXIT_SUCCESS);
752
avahi_simple_poll_quit(mc->simple_poll);
575
753
}
576
754
}
577
755
}
585
763
const char *name,
586
764
const char *type,
587
765
const char *domain,
588
AVAHI_GCC_UNUSED AvahiLookupResultFlags flags,
766
AVAHI_GCC_UNUSED AvahiLookupResultFlags
767
flags,
589
768
void* userdata) {
590
769
mandos_context *mc = userdata;
591
assert(b); /* Spurious warning */
770
assert(b);
592
771
593
772
/* Called whenever a new services becomes available on the LAN or
594
773
is removed from the LAN */
597
776
default:
598
777
case AVAHI_BROWSER_FAILURE:
599
778
600
fprintf(stderr, "(Browser) %s\n",
779
fprintf(stderr, "(Avahi browser) %s\n",
601
780
avahi_strerror(avahi_server_errno(mc->server)));
602
781
avahi_simple_poll_quit(mc->simple_poll);
603
782
return;
604
783
605
784
case AVAHI_BROWSER_NEW:
606
/* We ignore the returned resolver object. In the callback
607
function we free it. If the server is terminated before
608
the callback function is called the server will free
609
the resolver for us. */
785
/* We ignore the returned Avahi resolver object. In the callback
786
function we free it. If the Avahi server is terminated before
787
the callback function is called the Avahi server will free the
788
resolver for us. */
610
789
611
if (!(avahi_s_service_resolver_new(mc->server, interface, protocol, name,
612
type, domain,
790
if (!(avahi_s_service_resolver_new(mc->server, interface,
791
protocol, name, type, domain,
613
792
AVAHI_PROTO_INET6, 0,
614
793
resolve_callback, mc)))
615
fprintf(stderr, "Failed to resolve service '%s': %s\n", name,
616
avahi_strerror(avahi_server_errno(mc->server)));
794
fprintf(stderr, "Avahi: Failed to resolve service '%s': %s\n",
795
name, avahi_strerror(avahi_server_errno(mc->server)));
617
796
break;
618
797
619
798
case AVAHI_BROWSER_REMOVE:
621
800
622
801
case AVAHI_BROWSER_ALL_FOR_NOW:
623
802
case AVAHI_BROWSER_CACHE_EXHAUSTED:
803
if(debug){
804
fprintf(stderr, "No Mandos server found, still searching...\n");
805
}
624
806
break;
625
807
}
626
808
}
627
809
628
/* Combines file name and path and returns the malloced new
629
string. some sane checks could/should be added */
630
static const char *combinepath(const char *first, const char *second){
631
size_t f_len = strlen(first);
632
size_t s_len = strlen(second);
633
char *tmp = malloc(f_len + s_len + 2);
634
if (tmp == NULL){
635
return NULL;
636
}
637
if(f_len > 0){
638
memcpy(tmp, first, f_len); /* Spurious warning */
639
}
640
tmp[f_len] = '/';
641
if(s_len > 0){
642
memcpy(tmp + f_len + 1, second, s_len); /* Spurious warning */
643
}
644
tmp[f_len + 1 + s_len] = '\0';
645
return tmp;
646
}
647
648
649
int main(AVAHI_GCC_UNUSED int argc, AVAHI_GCC_UNUSED char*argv[]) {
650
AvahiServerConfig config;
810
int main(int argc, char *argv[]){
651
811
AvahiSServiceBrowser *sb = NULL;
652
812
int error;
653
813
int ret;
654
int debug_int;
655
int returncode = EXIT_SUCCESS;
814
int exitcode = EXIT_SUCCESS;
656
815
const char *interface = "eth0";
657
816
struct ifreq network;
658
817
int sd;
818
uid_t uid;
819
gid_t gid;
659
820
char *connect_to = NULL;
821
char tempdir[] = "/tmp/mandosXXXXXX";
660
822
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
823
const char *seckey = PATHDIR "/" SECKEY;
824
const char *pubkey = PATHDIR "/" PUBKEY;
825
661
826
mandos_context mc = { .simple_poll = NULL, .server = NULL,
662
.dh_bits = 1024, .priority = "SECURE256"};
663
664
debug_int = debug ? 1 : 0;
665
while (true){
666
struct option long_options[] = {
667
{"debug", no_argument, &debug_int, 1},
668
{"connect", required_argument, NULL, 'c'},
669
{"interface", required_argument, NULL, 'i'},
670
{"keydir", required_argument, NULL, 'd'},
671
{"seckey", required_argument, NULL, 's'},
672
{"pubkey", required_argument, NULL, 'p'},
673
{"dh-bits", required_argument, NULL, 'D'},
674
{"priority", required_argument, NULL, 'P'},
675
{0, 0, 0, 0} };
676
677
int option_index = 0;
678
ret = getopt_long (argc, argv, "i:", long_options,
679
&option_index);
680
681
if (ret == -1){
682
break;
683
}
684
685
switch(ret){
686
case 0:
687
break;
688
case 'i':
689
interface = optarg;
690
break;
691
case 'c':
692
connect_to = optarg;
693
break;
694
case 'd':
695
keydir = optarg;
696
break;
697
case 'p':
698
pubkeyfile = optarg;
699
break;
700
case 's':
701
seckeyfile = optarg;
702
break;
703
case 'D':
704
errno = 0;
705
mc.dh_bits = (unsigned int) strtol(optarg, NULL, 10);
706
if (errno){
707
perror("strtol");
708
exit(EXIT_FAILURE);
709
}
710
break;
711
case 'P':
712
mc.priority = optarg;
713
break;
714
case '?':
715
default:
716
exit(EXIT_FAILURE);
717
}
718
}
719
debug = debug_int ? true : false;
720
721
pubkeyfile = combinepath(keydir, pubkeyfile);
722
if (pubkeyfile == NULL){
723
perror("combinepath");
724
returncode = EXIT_FAILURE;
725
goto exit;
726
}
727
728
seckeyfile = combinepath(keydir, seckeyfile);
729
if (seckeyfile == NULL){
730
perror("combinepath");
731
goto exit;
827
.dh_bits = 1024, .priority = "SECURE256"
828
":!CTYPE-X.509:+CTYPE-OPENPGP" };
829
bool gnutls_initalized = false;
830
bool gpgme_initalized = false;
831
832
{
833
struct argp_option options[] = {
834
{ .name = "debug", .key = 128,
835
.doc = "Debug mode", .group = 3 },
836
{ .name = "connect", .key = 'c',
837
.arg = "ADDRESS:PORT",
838
.doc = "Connect directly to a specific Mandos server",
839
.group = 1 },
840
{ .name = "interface", .key = 'i',
841
.arg = "NAME",
842
.doc = "Interface that will be used to search for Mandos"
843
" servers",
844
.group = 1 },
845
{ .name = "seckey", .key = 's',
846
.arg = "FILE",
847
.doc = "OpenPGP secret key file base name",
848
.group = 1 },
849
{ .name = "pubkey", .key = 'p',
850
.arg = "FILE",
851
.doc = "OpenPGP public key file base name",
852
.group = 2 },
853
{ .name = "dh-bits", .key = 129,
854
.arg = "BITS",
855
.doc = "Bit length of the prime number used in the"
856
" Diffie-Hellman key exchange",
857
.group = 2 },
858
{ .name = "priority", .key = 130,
859
.arg = "STRING",
860
.doc = "GnuTLS priority string for the TLS handshake",
861
.group = 1 },
862
{ .name = NULL }
863
};
864
865
error_t parse_opt (int key, char *arg,
866
struct argp_state *state) {
867
/* Get the INPUT argument from `argp_parse', which we know is
868
a pointer to our plugin list pointer. */
869
switch (key) {
870
case 128: /* --debug */
871
debug = true;
872
break;
873
case 'c': /* --connect */
874
connect_to = arg;
875
break;
876
case 'i': /* --interface */
877
interface = arg;
878
break;
879
case 's': /* --seckey */
880
seckey = arg;
881
break;
882
case 'p': /* --pubkey */
883
pubkey = arg;
884
break;
885
case 129: /* --dh-bits */
886
errno = 0;
887
mc.dh_bits = (unsigned int) strtol(arg, NULL, 10);
888
if (errno){
889
perror("strtol");
890
exit(EXIT_FAILURE);
891
}
892
break;
893
case 130: /* --priority */
894
mc.priority = arg;
895
break;
896
case ARGP_KEY_ARG:
897
argp_usage (state);
898
case ARGP_KEY_END:
899
break;
900
default:
901
return ARGP_ERR_UNKNOWN;
902
}
903
return 0;
904
}
905
906
struct argp argp = { .options = options, .parser = parse_opt,
907
.args_doc = "",
908
.doc = "Mandos client -- Get and decrypt"
909
" passwords from a Mandos server" };
910
ret = argp_parse (&argp, argc, argv, 0, 0, NULL);
911
if (ret == ARGP_ERR_UNKNOWN){
912
fprintf(stderr, "Unknown error while parsing arguments\n");
913
exitcode = EXIT_FAILURE;
914
goto end;
915
}
916
}
917
918
/* If the interface is down, bring it up */
919
{
920
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
921
if(sd < 0) {
922
perror("socket");
923
exitcode = EXIT_FAILURE;
924
goto end;
925
}
926
strcpy(network.ifr_name, interface);
927
ret = ioctl(sd, SIOCGIFFLAGS, &network);
928
if(ret == -1){
929
perror("ioctl SIOCGIFFLAGS");
930
exitcode = EXIT_FAILURE;
931
goto end;
932
}
933
if((network.ifr_flags & IFF_UP) == 0){
934
network.ifr_flags |= IFF_UP;
935
ret = ioctl(sd, SIOCSIFFLAGS, &network);
936
if(ret == -1){
937
perror("ioctl SIOCSIFFLAGS");
938
exitcode = EXIT_FAILURE;
939
goto end;
940
}
941
}
942
ret = TEMP_FAILURE_RETRY(close(sd));
943
if(ret == -1){
944
perror("close");
945
}
946
}
947
948
uid = getuid();
949
gid = getgid();
950
951
ret = setuid(uid);
952
if (ret == -1){
953
perror("setuid");
954
}
955
956
setgid(gid);
957
if (ret == -1){
958
perror("setgid");
959
}
960
961
ret = init_gnutls_global(&mc, pubkey, seckey);
962
if (ret == -1){
963
fprintf(stderr, "init_gnutls_global failed\n");
964
exitcode = EXIT_FAILURE;
965
goto end;
966
} else {
967
gnutls_initalized = true;
968
}
969
970
if(mkdtemp(tempdir) == NULL){
971
perror("mkdtemp");
972
tempdir[0] = '\0';
973
goto end;
974
}
975
976
if(not init_gpgme(&mc, pubkey, seckey, tempdir)){
977
fprintf(stderr, "gpgme_initalized failed\n");
978
exitcode = EXIT_FAILURE;
979
goto end;
980
} else {
981
gpgme_initalized = true;
732
982
}
733
983
734
984
if_index = (AvahiIfIndex) if_nametoindex(interface);
743
993
char *address = strrchr(connect_to, ':');
744
994
if(address == NULL){
745
995
fprintf(stderr, "No colon in address\n");
746
exit(EXIT_FAILURE);
996
exitcode = EXIT_FAILURE;
997
goto end;
747
998
}
748
999
errno = 0;
749
1000
uint16_t port = (uint16_t) strtol(address+1, NULL, 10);
750
1001
if(errno){
751
1002
perror("Bad port number");
752
exit(EXIT_FAILURE);
1003
exitcode = EXIT_FAILURE;
1004
goto end;
753
1005
}
754
1006
*address = '\0';
755
1007
address = connect_to;
756
1008
ret = start_mandos_communication(address, port, if_index, &mc);
757
1009
if(ret < 0){
758
exit(EXIT_FAILURE);
1010
exitcode = EXIT_FAILURE;
759
1011
} else {
760
exit(EXIT_SUCCESS);
761
}
762
}
763
764
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
765
if(sd < 0) {
766
perror("socket");
767
returncode = EXIT_FAILURE;
768
goto exit;
769
}
770
strcpy(network.ifr_name, interface); /* Spurious warning */
771
ret = ioctl(sd, SIOCGIFFLAGS, &network);
772
if(ret == -1){
773
774
perror("ioctl SIOCGIFFLAGS");
775
returncode = EXIT_FAILURE;
776
goto exit;
777
}
778
if((network.ifr_flags & IFF_UP) == 0){
779
network.ifr_flags |= IFF_UP;
780
ret = ioctl(sd, SIOCSIFFLAGS, &network);
781
if(ret == -1){
782
perror("ioctl SIOCSIFFLAGS");
783
returncode = EXIT_FAILURE;
784
goto exit;
785
}
786
}
787
close(sd);
1012
exitcode = EXIT_SUCCESS;
1013
}
1014
goto end;
1015
}
788
1016
789
1017
if (not debug){
790
1018
avahi_set_log_function(empty_log);
791
1019
}
792
1020
793
/* Initialize the psuedo-RNG */
1021
/* Initialize the pseudo-RNG for Avahi */
794
1022
srand((unsigned int) time(NULL));
795
796
/* Allocate main loop object */
797
if (!(mc.simple_poll = avahi_simple_poll_new())) {
798
fprintf(stderr, "Failed to create simple poll object.\n");
799
returncode = EXIT_FAILURE;
800
goto exit;
801
}
802
803
/* Do not publish any local records */
804
avahi_server_config_init(&config);
805
config.publish_hinfo = 0;
806
config.publish_addresses = 0;
807
config.publish_workstation = 0;
808
config.publish_domain = 0;
809
810
/* Allocate a new server */
811
mc.server=avahi_server_new(avahi_simple_poll_get(mc.simple_poll),
812
&config, NULL, NULL, &error);
813
814
/* Free the configuration data */
815
avahi_server_config_free(&config);
816
817
/* Check if creating the server object succeeded */
818
if (!mc.server) {
819
fprintf(stderr, "Failed to create server: %s\n",
1023
1024
/* Allocate main Avahi loop object */
1025
mc.simple_poll = avahi_simple_poll_new();
1026
if (mc.simple_poll == NULL) {
1027
fprintf(stderr, "Avahi: Failed to create simple poll"
1028
" object.\n");
1029
exitcode = EXIT_FAILURE;
1030
goto end;
1031
}
1032
1033
{
1034
AvahiServerConfig config;
1035
/* Do not publish any local Zeroconf records */
1036
avahi_server_config_init(&config);
1037
config.publish_hinfo = 0;
1038
config.publish_addresses = 0;
1039
config.publish_workstation = 0;
1040
config.publish_domain = 0;
1041
1042
/* Allocate a new server */
1043
mc.server = avahi_server_new(avahi_simple_poll_get
1044
(mc.simple_poll), &config, NULL,
1045
NULL, &error);
1046
1047
/* Free the Avahi configuration data */
1048
avahi_server_config_free(&config);
1049
}
1050
1051
/* Check if creating the Avahi server object succeeded */
1052
if (mc.server == NULL) {
1053
fprintf(stderr, "Failed to create Avahi server: %s\n",
820
1054
avahi_strerror(error));
821
returncode = EXIT_FAILURE;
822
goto exit;
1055
exitcode = EXIT_FAILURE;
1056
goto end;
823
1057
}
824
1058
825
/* Create the service browser */
1059
/* Create the Avahi service browser */
826
1060
sb = avahi_s_service_browser_new(mc.server, if_index,
827
1061
AVAHI_PROTO_INET6,
828
1062
"_mandos._tcp", NULL, 0,
829
1063
browse_callback, &mc);
830
if (!sb) {
1064
if (sb == NULL) {
831
1065
fprintf(stderr, "Failed to create service browser: %s\n",
832
1066
avahi_strerror(avahi_server_errno(mc.server)));
833
returncode = EXIT_FAILURE;
834
goto exit;
1067
exitcode = EXIT_FAILURE;
1068
goto end;
835
1069
}
836
1070
837
1071
/* Run the main loop */
838
1072
839
1073
if (debug){
840
fprintf(stderr, "Starting avahi loop search\n");
1074
fprintf(stderr, "Starting Avahi loop search\n");
841
1075
}
842
1076
843
1077
avahi_simple_poll_loop(mc.simple_poll);
844
1078
845
exit:
846
1079
end:
1080
847
1081
if (debug){
848
1082
fprintf(stderr, "%s exiting\n", argv[0]);
849
1083
}
850
1084
851
1085
/* Cleanup things */
852
if (sb)
1086
if (sb != NULL)
853
1087
avahi_s_service_browser_free(sb);
854
1088
855
if (mc.server)
1089
if (mc.server != NULL)
856
1090
avahi_server_free(mc.server);
857
858
if (mc.simple_poll)
1091
1092
if (mc.simple_poll != NULL)
859
1093
avahi_simple_poll_free(mc.simple_poll);
860
free(pubkeyfile);
861
free(seckeyfile);
862
863
return returncode;
1094
1095
if (gnutls_initalized){
1096
gnutls_certificate_free_credentials(mc.cred);
1097
gnutls_global_deinit ();
1098
gnutls_dh_params_deinit(mc.dh_params);
1099
}
1100
1101
if(gpgme_initalized){
1102
gpgme_release(mc.ctx);
1103
}
1104
1105
/* Removes the temp directory used by GPGME */
1106
if(tempdir[0] != '\0'){
1107
DIR *d;
1108
struct dirent *direntry;
1109
d = opendir(tempdir);
1110
if(d == NULL){
1111
perror("opendir");
1112
} else {
1113
while(true){
1114
direntry = readdir(d);
1115
if(direntry == NULL){
1116
break;
1117
}
1118
if (direntry->d_type == DT_REG){
1119
char *fullname = NULL;
1120
ret = asprintf(&fullname, "%s/%s", tempdir,
1121
direntry->d_name);
1122
if(ret < 0){
1123
perror("asprintf");
1124
continue;
1125
}
1126
ret = unlink(fullname);
1127
if(ret == -1){
1128
fprintf(stderr, "unlink(\"%s\"): %s",
1129
fullname, strerror(errno));
1130
}
1131
free(fullname);
1132
}
1133
}
1134
closedir(d);
1135
}
1136
ret = rmdir(tempdir);
1137
if(ret == -1){
1138
perror("rmdir");
1139
}
1140
}
1141
1142
return exitcode;
864
1143
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0