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- Committer: Teddy Hogeborn
- Date: 2009-02-05 03:26:27 UTC
- Revision ID: teddy@fukt.bsnet.se-20090205032627-fbvgm97q5gtrbg10
* plugin-runner.c (handle_sigchld): Bug fix: Save and restore "errno".
- files added:
- .bzr-builddeb
- debian
- debian/po
- files removed:
- network-protocol.txt
- files renamed:
- mandos-client.c => plugin-runner.c
- mandos-client.xml => plugin-runner.xml
- plugins.d/password-request.c => plugins.d/mandos-client.c
- plugins.d/password-request.xml => plugins.d/mandos-client.xml
- files modified:
- Makefile
added
removed
plugins.d/mandos-client.c
1
1
/* -*- coding: utf-8 -*- */
2
2
/*
3
* Mandos client - get and decrypt data from a Mandos server
3
* Mandos-client - get and decrypt data from a Mandos server
4
4
*
5
5
* This program is partly derived from an example program for an Avahi
6
6
* service browser, downloaded from
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 © 2008,2009 Teddy Hogeborn
13
* Copyright © 2008,2009 Björn Påhlsson
13
14
*
14
15
* This program is free software: you can redistribute it and/or
15
16
* modify it under the terms of the GNU General Public License as
32
33
#define _LARGEFILE_SOURCE
33
34
#define _FILE_OFFSET_BITS 64
34
35
35
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY() */
36
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), asprintf() */
36
37
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,
43
SIOCSIFFLAGS */
38
#include <stdio.h> /* fprintf(), stderr, fwrite(),
39
stdout, ferror(), sscanf(),
40
remove() */
41
#include <stdint.h> /* uint16_t, uint32_t */
42
#include <stddef.h> /* NULL, size_t, ssize_t */
43
#include <stdlib.h> /* free(), EXIT_SUCCESS, EXIT_FAILURE,
44
srand() */
45
#include <stdbool.h> /* bool, true */
46
#include <string.h> /* memset(), strcmp(), strlen(),
47
strerror(), asprintf(), strcpy() */
48
#include <sys/ioctl.h> /* ioctl */
49
#include <sys/types.h> /* socket(), inet_pton(), sockaddr,
50
sockaddr_in6, PF_INET6,
51
SOCK_STREAM, INET6_ADDRSTRLEN,
52
uid_t, gid_t, open(), opendir(),
53
DIR */
54
#include <sys/stat.h> /* open() */
55
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
56
struct in6_addr, inet_pton(),
57
connect() */
58
#include <fcntl.h> /* open() */
59
#include <dirent.h> /* opendir(), struct dirent, readdir()
60
*/
61
#include <inttypes.h> /* PRIu16, intmax_t, SCNdMAX */
62
#include <assert.h> /* assert() */
63
#include <errno.h> /* perror(), errno */
64
#include <time.h> /* nanosleep(), time() */
44
65
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
45
SIOCSIFFLAGS */
66
SIOCSIFFLAGS, if_indextoname(),
67
if_nametoindex(), IF_NAMESIZE */
68
#include <netinet/in.h>
69
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
70
getuid(), getgid(), setuid(),
71
setgid() */
72
#include <arpa/inet.h> /* inet_pton(), htons */
73
#include <iso646.h> /* not, and, or */
74
#include <argp.h> /* struct argp_option, error_t, struct
75
argp_state, struct argp,
76
argp_parse(), ARGP_KEY_ARG,
77
ARGP_KEY_END, ARGP_ERR_UNKNOWN */
78
#ifdef __linux__
79
#include <sys/klog.h> /* klogctl() */
80
#endif
46
81
82
/* Avahi */
83
/* All Avahi types, constants and functions
84
Avahi*, avahi_*,
85
AVAHI_* */
47
86
#include <avahi-core/core.h>
48
87
#include <avahi-core/lookup.h>
49
88
#include <avahi-core/log.h>
51
90
#include <avahi-common/malloc.h>
52
91
#include <avahi-common/error.h>
53
92
54
/* Mandos client part */
55
#include <sys/types.h> /* socket(), inet_pton() */
56
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
57
struct in6_addr, inet_pton() */
58
#include <gnutls/gnutls.h> /* All GnuTLS stuff */
59
#include <gnutls/openpgp.h> /* GnuTLS with openpgp stuff */
93
/* GnuTLS */
94
#include <gnutls/gnutls.h> /* All GnuTLS types, constants and
95
functions:
96
gnutls_*
97
init_gnutls_session(),
98
GNUTLS_* */
99
#include <gnutls/openpgp.h>
100
/* gnutls_certificate_set_openpgp_key_file(),
101
GNUTLS_OPENPGP_FMT_BASE64 */
60
102
61
#include <unistd.h> /* close() */
62
#include <netinet/in.h>
63
#include <stdbool.h> /* true */
64
#include <string.h> /* memset */
65
#include <arpa/inet.h> /* inet_pton() */
66
#include <iso646.h> /* not */
67
#include <net/if.h> /* IF_NAMESIZE */
68
#include <argp.h> /* struct argp_option,
69
struct argp_state, struct argp,
70
argp_parse() */
71
103
/* GPGME */
72
#include <errno.h> /* perror() */
73
#include <gpgme.h>
104
#include <gpgme.h> /* All GPGME types, constants and
105
functions:
106
gpgme_*
107
GPGME_PROTOCOL_OpenPGP,
108
GPG_ERR_NO_* */
74
109
75
110
#define BUFFER_SIZE 256
76
111
112
#define PATHDIR "/conf/conf.d/mandos"
113
#define SECKEY "seckey.txt"
114
#define PUBKEY "pubkey.txt"
115
77
116
bool debug = false;
78
static const char *keydir = "/conf/conf.d/mandos";
79
117
static const char mandos_protocol_version[] = "1";
80
const char *argp_program_version = "mandosclient 0.9";
118
const char *argp_program_version = "mandos-client " VERSION;
81
119
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
82
120
83
121
/* Used for passing in values through the Avahi callback functions */
88
126
unsigned int dh_bits;
89
127
gnutls_dh_params_t dh_params;
90
128
const char *priority;
129
gpgme_ctx_t ctx;
91
130
} mandos_context;
92
131
93
132
/*
97
136
*/
98
137
size_t adjustbuffer(char **buffer, size_t buffer_length,
99
138
size_t buffer_capacity){
100
if (buffer_length + BUFFER_SIZE > buffer_capacity){
139
if(buffer_length + BUFFER_SIZE > buffer_capacity){
101
140
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
102
if (buffer == NULL){
141
if(buffer == NULL){
103
142
return 0;
104
143
}
105
144
buffer_capacity += BUFFER_SIZE;
108
147
}
109
148
110
149
/*
111
* Decrypt OpenPGP data using keyrings in HOMEDIR.
112
* Returns -1 on error
150
* Initialize GPGME.
113
151
*/
114
static ssize_t pgp_packet_decrypt (const char *cryptotext,
115
size_t crypto_size,
116
char **plaintext,
117
const char *homedir){
118
gpgme_data_t dh_crypto, dh_plain;
119
gpgme_ctx_t ctx;
152
static bool init_gpgme(mandos_context *mc, const char *seckey,
153
const char *pubkey, const char *tempdir){
154
int ret;
120
155
gpgme_error_t rc;
121
ssize_t ret;
122
size_t plaintext_capacity = 0;
123
ssize_t plaintext_length = 0;
124
156
gpgme_engine_info_t engine_info;
125
157
126
if (debug){
127
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
158
159
/*
160
* Helper function to insert pub and seckey to the engine keyring.
161
*/
162
bool import_key(const char *filename){
163
int fd;
164
gpgme_data_t pgp_data;
165
166
fd = (int)TEMP_FAILURE_RETRY(open(filename, O_RDONLY));
167
if(fd == -1){
168
perror("open");
169
return false;
170
}
171
172
rc = gpgme_data_new_from_fd(&pgp_data, fd);
173
if(rc != GPG_ERR_NO_ERROR){
174
fprintf(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
175
gpgme_strsource(rc), gpgme_strerror(rc));
176
return false;
177
}
178
179
rc = gpgme_op_import(mc->ctx, pgp_data);
180
if(rc != GPG_ERR_NO_ERROR){
181
fprintf(stderr, "bad gpgme_op_import: %s: %s\n",
182
gpgme_strsource(rc), gpgme_strerror(rc));
183
return false;
184
}
185
186
ret = (int)TEMP_FAILURE_RETRY(close(fd));
187
if(ret == -1){
188
perror("close");
189
}
190
gpgme_data_release(pgp_data);
191
return true;
192
}
193
194
if(debug){
195
fprintf(stderr, "Initialize gpgme\n");
128
196
}
129
197
130
198
/* Init GPGME */
131
199
gpgme_check_version(NULL);
132
200
rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
133
if (rc != GPG_ERR_NO_ERROR){
201
if(rc != GPG_ERR_NO_ERROR){
134
202
fprintf(stderr, "bad gpgme_engine_check_version: %s: %s\n",
135
203
gpgme_strsource(rc), gpgme_strerror(rc));
136
return -1;
204
return false;
137
205
}
138
206
139
/* Set GPGME home directory for the OpenPGP engine only */
140
rc = gpgme_get_engine_info (&engine_info);
141
if (rc != GPG_ERR_NO_ERROR){
207
/* Set GPGME home directory for the OpenPGP engine only */
208
rc = gpgme_get_engine_info(&engine_info);
209
if(rc != GPG_ERR_NO_ERROR){
142
210
fprintf(stderr, "bad gpgme_get_engine_info: %s: %s\n",
143
211
gpgme_strsource(rc), gpgme_strerror(rc));
144
return -1;
212
return false;
145
213
}
146
214
while(engine_info != NULL){
147
215
if(engine_info->protocol == GPGME_PROTOCOL_OpenPGP){
148
216
gpgme_set_engine_info(GPGME_PROTOCOL_OpenPGP,
149
engine_info->file_name, homedir);
217
engine_info->file_name, tempdir);
150
218
break;
151
219
}
152
220
engine_info = engine_info->next;
153
221
}
154
222
if(engine_info == NULL){
155
fprintf(stderr, "Could not set GPGME home dir to %s\n", homedir);
156
return -1;
223
fprintf(stderr, "Could not set GPGME home dir to %s\n", tempdir);
224
return false;
225
}
226
227
/* Create new GPGME "context" */
228
rc = gpgme_new(&(mc->ctx));
229
if(rc != GPG_ERR_NO_ERROR){
230
fprintf(stderr, "bad gpgme_new: %s: %s\n",
231
gpgme_strsource(rc), gpgme_strerror(rc));
232
return false;
233
}
234
235
if(not import_key(pubkey) or not import_key(seckey)){
236
return false;
237
}
238
239
return true;
240
}
241
242
/*
243
* Decrypt OpenPGP data.
244
* Returns -1 on error
245
*/
246
static ssize_t pgp_packet_decrypt(const mandos_context *mc,
247
const char *cryptotext,
248
size_t crypto_size,
249
char **plaintext){
250
gpgme_data_t dh_crypto, dh_plain;
251
gpgme_error_t rc;
252
ssize_t ret;
253
size_t plaintext_capacity = 0;
254
ssize_t plaintext_length = 0;
255
256
if(debug){
257
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
157
258
}
158
259
159
260
/* Create new GPGME data buffer from memory cryptotext */
160
261
rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,
161
262
0);
162
if (rc != GPG_ERR_NO_ERROR){
263
if(rc != GPG_ERR_NO_ERROR){
163
264
fprintf(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
164
265
gpgme_strsource(rc), gpgme_strerror(rc));
165
266
return -1;
167
268
168
269
/* Create new empty GPGME data buffer for the plaintext */
169
270
rc = gpgme_data_new(&dh_plain);
170
if (rc != GPG_ERR_NO_ERROR){
271
if(rc != GPG_ERR_NO_ERROR){
171
272
fprintf(stderr, "bad gpgme_data_new: %s: %s\n",
172
273
gpgme_strsource(rc), gpgme_strerror(rc));
173
274
gpgme_data_release(dh_crypto);
174
275
return -1;
175
276
}
176
277
177
/* Create new GPGME "context" */
178
rc = gpgme_new(&ctx);
179
if (rc != GPG_ERR_NO_ERROR){
180
fprintf(stderr, "bad gpgme_new: %s: %s\n",
181
gpgme_strsource(rc), gpgme_strerror(rc));
182
plaintext_length = -1;
183
goto decrypt_end;
184
}
185
186
278
/* Decrypt data from the cryptotext data buffer to the plaintext
187
279
data buffer */
188
rc = gpgme_op_decrypt(ctx, dh_crypto, dh_plain);
189
if (rc != GPG_ERR_NO_ERROR){
280
rc = gpgme_op_decrypt(mc->ctx, dh_crypto, dh_plain);
281
if(rc != GPG_ERR_NO_ERROR){
190
282
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
191
283
gpgme_strsource(rc), gpgme_strerror(rc));
192
284
plaintext_length = -1;
285
if(debug){
286
gpgme_decrypt_result_t result;
287
result = gpgme_op_decrypt_result(mc->ctx);
288
if(result == NULL){
289
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
290
} else {
291
fprintf(stderr, "Unsupported algorithm: %s\n",
292
result->unsupported_algorithm);
293
fprintf(stderr, "Wrong key usage: %u\n",
294
result->wrong_key_usage);
295
if(result->file_name != NULL){
296
fprintf(stderr, "File name: %s\n", result->file_name);
297
}
298
gpgme_recipient_t recipient;
299
recipient = result->recipients;
300
if(recipient){
301
while(recipient != NULL){
302
fprintf(stderr, "Public key algorithm: %s\n",
303
gpgme_pubkey_algo_name(recipient->pubkey_algo));
304
fprintf(stderr, "Key ID: %s\n", recipient->keyid);
305
fprintf(stderr, "Secret key available: %s\n",
306
recipient->status == GPG_ERR_NO_SECKEY
307
? "No" : "Yes");
308
recipient = recipient->next;
309
}
310
}
311
}
312
}
193
313
goto decrypt_end;
194
314
}
195
315
197
317
fprintf(stderr, "Decryption of OpenPGP data succeeded\n");
198
318
}
199
319
200
if (debug){
201
gpgme_decrypt_result_t result;
202
result = gpgme_op_decrypt_result(ctx);
203
if (result == NULL){
204
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
205
} else {
206
fprintf(stderr, "Unsupported algorithm: %s\n",
207
result->unsupported_algorithm);
208
fprintf(stderr, "Wrong key usage: %d\n",
209
result->wrong_key_usage);
210
if(result->file_name != NULL){
211
fprintf(stderr, "File name: %s\n", result->file_name);
212
}
213
gpgme_recipient_t recipient;
214
recipient = result->recipients;
215
if(recipient){
216
while(recipient != NULL){
217
fprintf(stderr, "Public key algorithm: %s\n",
218
gpgme_pubkey_algo_name(recipient->pubkey_algo));
219
fprintf(stderr, "Key ID: %s\n", recipient->keyid);
220
fprintf(stderr, "Secret key available: %s\n",
221
recipient->status == GPG_ERR_NO_SECKEY
222
? "No" : "Yes");
223
recipient = recipient->next;
224
}
225
}
226
}
227
}
228
229
320
/* Seek back to the beginning of the GPGME plaintext data buffer */
230
if (gpgme_data_seek(dh_plain, (off_t) 0, SEEK_SET) == -1){
231
perror("pgpme_data_seek");
321
if(gpgme_data_seek(dh_plain, (off_t)0, SEEK_SET) == -1){
322
perror("gpgme_data_seek");
232
323
plaintext_length = -1;
233
324
goto decrypt_end;
234
325
}
238
329
plaintext_capacity = adjustbuffer(plaintext,
239
330
(size_t)plaintext_length,
240
331
plaintext_capacity);
241
if (plaintext_capacity == 0){
332
if(plaintext_capacity == 0){
242
333
perror("adjustbuffer");
243
334
plaintext_length = -1;
244
335
goto decrypt_end;
247
338
ret = gpgme_data_read(dh_plain, *plaintext + plaintext_length,
248
339
BUFFER_SIZE);
249
340
/* Print the data, if any */
250
if (ret == 0){
341
if(ret == 0){
251
342
/* EOF */
252
343
break;
253
344
}
258
349
}
259
350
plaintext_length += ret;
260
351
}
261
352
262
353
if(debug){
263
354
fprintf(stderr, "Decrypted password is: ");
264
355
for(ssize_t i = 0; i < plaintext_length; i++){
277
368
return plaintext_length;
278
369
}
279
370
280
static const char * safer_gnutls_strerror (int value) {
281
const char *ret = gnutls_strerror (value);
282
if (ret == NULL)
371
static const char * safer_gnutls_strerror(int value){
372
const char *ret = gnutls_strerror(value); /* Spurious warning from
373
-Wunreachable-code */
374
if(ret == NULL)
283
375
ret = "(unknown)";
284
376
return ret;
285
377
}
291
383
}
292
384
293
385
static int init_gnutls_global(mandos_context *mc,
294
const char *pubkeyfile,
295
const char *seckeyfile){
386
const char *pubkeyfilename,
387
const char *seckeyfilename){
296
388
int ret;
297
389
298
390
if(debug){
299
391
fprintf(stderr, "Initializing GnuTLS\n");
300
392
}
301
302
if ((ret = gnutls_global_init ())
303
!= GNUTLS_E_SUCCESS) {
304
fprintf (stderr, "GnuTLS global_init: %s\n",
305
safer_gnutls_strerror(ret));
393
394
ret = gnutls_global_init();
395
if(ret != GNUTLS_E_SUCCESS){
396
fprintf(stderr, "GnuTLS global_init: %s\n",
397
safer_gnutls_strerror(ret));
306
398
return -1;
307
399
}
308
400
309
if (debug){
401
if(debug){
310
402
/* "Use a log level over 10 to enable all debugging options."
311
403
* - GnuTLS manual
312
404
*/
315
407
}
316
408
317
409
/* OpenPGP credentials */
318
if ((ret = gnutls_certificate_allocate_credentials (&mc->cred))
319
!= GNUTLS_E_SUCCESS) {
320
fprintf (stderr, "GnuTLS memory error: %s\n",
321
safer_gnutls_strerror(ret));
322
gnutls_global_deinit ();
410
gnutls_certificate_allocate_credentials(&mc->cred);
411
if(ret != GNUTLS_E_SUCCESS){
412
fprintf(stderr, "GnuTLS memory error: %s\n", /* Spurious warning
413
* from
414
* -Wunreachable-code
415
*/
416
safer_gnutls_strerror(ret));
417
gnutls_global_deinit();
323
418
return -1;
324
419
}
325
420
326
421
if(debug){
327
fprintf(stderr, "Attempting to use OpenPGP certificate %s"
328
" and keyfile %s as GnuTLS credentials\n", pubkeyfile,
329
seckeyfile);
422
fprintf(stderr, "Attempting to use OpenPGP public key %s and"
423
" secret key %s as GnuTLS credentials\n", pubkeyfilename,
424
seckeyfilename);
330
425
}
331
426
332
427
ret = gnutls_certificate_set_openpgp_key_file
333
(mc->cred, pubkeyfile, seckeyfile, GNUTLS_OPENPGP_FMT_BASE64);
334
if (ret != GNUTLS_E_SUCCESS) {
428
(mc->cred, pubkeyfilename, seckeyfilename,
429
GNUTLS_OPENPGP_FMT_BASE64);
430
if(ret != GNUTLS_E_SUCCESS){
335
431
fprintf(stderr,
336
432
"Error[%d] while reading the OpenPGP key pair ('%s',"
337
" '%s')\n", ret, pubkeyfile, seckeyfile);
338
fprintf(stdout, "The GnuTLS error is: %s\n",
433
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
434
fprintf(stderr, "The GnuTLS error is: %s\n",
339
435
safer_gnutls_strerror(ret));
340
436
goto globalfail;
341
437
}
342
438
343
439
/* GnuTLS server initialization */
344
440
ret = gnutls_dh_params_init(&mc->dh_params);
345
if (ret != GNUTLS_E_SUCCESS) {
346
fprintf (stderr, "Error in GnuTLS DH parameter initialization:"
347
" %s\n", safer_gnutls_strerror(ret));
441
if(ret != GNUTLS_E_SUCCESS){
442
fprintf(stderr, "Error in GnuTLS DH parameter initialization:"
443
" %s\n", safer_gnutls_strerror(ret));
348
444
goto globalfail;
349
445
}
350
446
ret = gnutls_dh_params_generate2(mc->dh_params, mc->dh_bits);
351
if (ret != GNUTLS_E_SUCCESS) {
352
fprintf (stderr, "Error in GnuTLS prime generation: %s\n",
353
safer_gnutls_strerror(ret));
447
if(ret != GNUTLS_E_SUCCESS){
448
fprintf(stderr, "Error in GnuTLS prime generation: %s\n",
449
safer_gnutls_strerror(ret));
354
450
goto globalfail;
355
451
}
356
452
357
453
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
358
454
359
455
return 0;
360
456
361
457
globalfail:
362
363
gnutls_certificate_free_credentials (mc->cred);
364
gnutls_global_deinit ();
458
459
gnutls_certificate_free_credentials(mc->cred);
460
gnutls_global_deinit();
461
gnutls_dh_params_deinit(mc->dh_params);
365
462
return -1;
366
367
463
}
368
464
369
465
static int init_gnutls_session(mandos_context *mc,
371
467
int ret;
372
468
/* GnuTLS session creation */
373
469
ret = gnutls_init(session, GNUTLS_SERVER);
374
if (ret != GNUTLS_E_SUCCESS){
470
if(ret != GNUTLS_E_SUCCESS){
375
471
fprintf(stderr, "Error in GnuTLS session initialization: %s\n",
376
472
safer_gnutls_strerror(ret));
377
473
}
379
475
{
380
476
const char *err;
381
477
ret = gnutls_priority_set_direct(*session, mc->priority, &err);
382
if (ret != GNUTLS_E_SUCCESS) {
478
if(ret != GNUTLS_E_SUCCESS){
383
479
fprintf(stderr, "Syntax error at: %s\n", err);
384
480
fprintf(stderr, "GnuTLS error: %s\n",
385
481
safer_gnutls_strerror(ret));
386
gnutls_deinit (*session);
482
gnutls_deinit(*session);
387
483
return -1;
388
484
}
389
485
}
390
486
391
487
ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,
392
488
mc->cred);
393
if (ret != GNUTLS_E_SUCCESS) {
489
if(ret != GNUTLS_E_SUCCESS){
394
490
fprintf(stderr, "Error setting GnuTLS credentials: %s\n",
395
491
safer_gnutls_strerror(ret));
396
gnutls_deinit (*session);
492
gnutls_deinit(*session);
397
493
return -1;
398
494
}
399
495
400
496
/* ignore client certificate if any. */
401
gnutls_certificate_server_set_request (*session,
402
GNUTLS_CERT_IGNORE);
497
gnutls_certificate_server_set_request(*session,
498
GNUTLS_CERT_IGNORE);
403
499
404
gnutls_dh_set_prime_bits (*session, mc->dh_bits);
500
gnutls_dh_set_prime_bits(*session, mc->dh_bits);
405
501
406
502
return 0;
407
503
}
415
511
AvahiIfIndex if_index,
416
512
mandos_context *mc){
417
513
int ret, tcp_sd;
514
ssize_t sret;
418
515
union { struct sockaddr in; struct sockaddr_in6 in6; } to;
419
516
char *buffer = NULL;
420
517
char *decrypted_buffer;
426
523
char interface[IF_NAMESIZE];
427
524
gnutls_session_t session;
428
525
429
ret = init_gnutls_session (mc, &session);
430
if (ret != 0){
526
ret = init_gnutls_session(mc, &session);
527
if(ret != 0){
431
528
return -1;
432
529
}
433
530
434
531
if(debug){
435
fprintf(stderr, "Setting up a tcp connection to %s, port %d\n",
436
ip, port);
532
fprintf(stderr, "Setting up a tcp connection to %s, port %" PRIu16
533
"\n", ip, port);
437
534
}
438
535
439
536
tcp_sd = socket(PF_INET6, SOCK_STREAM, 0);
440
if(tcp_sd < 0) {
537
if(tcp_sd < 0){
441
538
perror("socket");
442
539
return -1;
443
540
}
444
541
445
542
if(debug){
446
543
if(if_indextoname((unsigned int)if_index, interface) == NULL){
447
544
perror("if_indextoname");
450
547
fprintf(stderr, "Binding to interface %s\n", interface);
451
548
}
452
549
453
memset(&to,0,sizeof(to)); /* Spurious warning */
550
memset(&to, 0, sizeof(to));
454
551
to.in6.sin6_family = AF_INET6;
455
552
/* It would be nice to have a way to detect if we were passed an
456
553
IPv4 address here. Now we assume an IPv6 address. */
457
554
ret = inet_pton(AF_INET6, ip, &to.in6.sin6_addr);
458
if (ret < 0 ){
555
if(ret < 0 ){
459
556
perror("inet_pton");
460
557
return -1;
461
558
}
463
560
fprintf(stderr, "Bad address: %s\n", ip);
464
561
return -1;
465
562
}
466
to.in6.sin6_port = htons(port); /* Spurious warning */
563
to.in6.sin6_port = htons(port); /* Spurious warnings from
564
-Wconversion and
565
-Wunreachable-code */
467
566
468
567
to.in6.sin6_scope_id = (uint32_t)if_index;
469
568
470
569
if(debug){
471
fprintf(stderr, "Connection to: %s, port %d\n", ip, port);
570
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
571
port);
472
572
char addrstr[INET6_ADDRSTRLEN] = "";
473
573
if(inet_ntop(to.in6.sin6_family, &(to.in6.sin6_addr), addrstr,
474
574
sizeof(addrstr)) == NULL){
481
581
}
482
582
483
583
ret = connect(tcp_sd, &to.in, sizeof(to));
484
if (ret < 0){
584
if(ret < 0){
485
585
perror("connect");
486
586
return -1;
487
587
}
488
588
489
589
const char *out = mandos_protocol_version;
490
590
written = 0;
491
while (true){
591
while(true){
492
592
size_t out_size = strlen(out);
493
ret = TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
593
ret = (int)TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
494
594
out_size - written));
495
if (ret == -1){
595
if(ret == -1){
496
596
perror("write");
497
597
retval = -1;
498
598
goto mandos_end;
501
601
if(written < out_size){
502
602
continue;
503
603
} else {
504
if (out == mandos_protocol_version){
604
if(out == mandos_protocol_version){
505
605
written = 0;
506
606
out = "\r\n";
507
607
} else {
509
609
}
510
610
}
511
611
}
512
612
513
613
if(debug){
514
614
fprintf(stderr, "Establishing TLS session with %s\n", ip);
515
615
}
516
616
517
gnutls_transport_set_ptr (session, (gnutls_transport_ptr_t) tcp_sd);
518
519
ret = gnutls_handshake (session);
520
521
if (ret != GNUTLS_E_SUCCESS){
617
gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t) tcp_sd);
618
619
do{
620
ret = gnutls_handshake(session);
621
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
622
623
if(ret != GNUTLS_E_SUCCESS){
522
624
if(debug){
523
625
fprintf(stderr, "*** GnuTLS Handshake failed ***\n");
524
gnutls_perror (ret);
626
gnutls_perror(ret);
525
627
}
526
628
retval = -1;
527
629
goto mandos_end;
533
635
fprintf(stderr, "Retrieving pgp encrypted password from %s\n",
534
636
ip);
535
637
}
536
638
537
639
while(true){
538
640
buffer_capacity = adjustbuffer(&buffer, buffer_length,
539
641
buffer_capacity);
540
if (buffer_capacity == 0){
642
if(buffer_capacity == 0){
541
643
perror("adjustbuffer");
542
644
retval = -1;
543
645
goto mandos_end;
544
646
}
545
647
546
ret = gnutls_record_recv(session, buffer+buffer_length,
547
BUFFER_SIZE);
548
if (ret == 0){
648
sret = gnutls_record_recv(session, buffer+buffer_length,
649
BUFFER_SIZE);
650
if(sret == 0){
549
651
break;
550
652
}
551
if (ret < 0){
552
switch(ret){
653
if(sret < 0){
654
switch(sret){
553
655
case GNUTLS_E_INTERRUPTED:
554
656
case GNUTLS_E_AGAIN:
555
657
break;
556
658
case GNUTLS_E_REHANDSHAKE:
557
ret = gnutls_handshake (session);
558
if (ret < 0){
659
do{
660
ret = gnutls_handshake(session);
661
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
662
if(ret < 0){
559
663
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
560
gnutls_perror (ret);
664
gnutls_perror(ret);
561
665
retval = -1;
562
666
goto mandos_end;
563
667
}
566
670
fprintf(stderr, "Unknown error while reading data from"
567
671
" encrypted session with Mandos server\n");
568
672
retval = -1;
569
gnutls_bye (session, GNUTLS_SHUT_RDWR);
673
gnutls_bye(session, GNUTLS_SHUT_RDWR);
570
674
goto mandos_end;
571
675
}
572
676
} else {
573
buffer_length += (size_t) ret;
677
buffer_length += (size_t) sret;
574
678
}
575
679
}
576
680
578
682
fprintf(stderr, "Closing TLS session\n");
579
683
}
580
684
581
gnutls_bye (session, GNUTLS_SHUT_RDWR);
685
gnutls_bye(session, GNUTLS_SHUT_RDWR);
582
686
583
if (buffer_length > 0){
584
decrypted_buffer_size = pgp_packet_decrypt(buffer,
687
if(buffer_length > 0){
688
decrypted_buffer_size = pgp_packet_decrypt(mc, buffer,
585
689
buffer_length,
586
&decrypted_buffer,
587
keydir);
588
if (decrypted_buffer_size >= 0){
690
&decrypted_buffer);
691
if(decrypted_buffer_size >= 0){
589
692
written = 0;
590
693
while(written < (size_t) decrypted_buffer_size){
591
ret = (int)fwrite (decrypted_buffer + written, 1,
592
(size_t)decrypted_buffer_size - written,
593
stdout);
694
ret = (int)fwrite(decrypted_buffer + written, 1,
695
(size_t)decrypted_buffer_size - written,
696
stdout);
594
697
if(ret == 0 and ferror(stdout)){
595
698
if(debug){
596
699
fprintf(stderr, "Error writing encrypted data: %s\n",
605
708
} else {
606
709
retval = -1;
607
710
}
711
} else {
712
retval = -1;
608
713
}
609
714
610
715
/* Shutdown procedure */
611
716
612
717
mandos_end:
613
718
free(buffer);
614
close(tcp_sd);
615
gnutls_deinit (session);
719
ret = (int)TEMP_FAILURE_RETRY(close(tcp_sd));
720
if(ret == -1){
721
perror("close");
722
}
723
gnutls_deinit(session);
616
724
return retval;
617
725
}
618
726
629
737
AVAHI_GCC_UNUSED AvahiStringList *txt,
630
738
AVAHI_GCC_UNUSED AvahiLookupResultFlags
631
739
flags,
632
void* userdata) {
740
void* userdata){
633
741
mandos_context *mc = userdata;
634
assert(r); /* Spurious warning */
742
assert(r);
635
743
636
744
/* Called whenever a service has been resolved successfully or
637
745
timed out */
638
746
639
switch (event) {
747
switch(event){
640
748
default:
641
749
case AVAHI_RESOLVER_FAILURE:
642
750
fprintf(stderr, "(Avahi Resolver) Failed to resolve service '%s'"
649
757
char ip[AVAHI_ADDRESS_STR_MAX];
650
758
avahi_address_snprint(ip, sizeof(ip), address);
651
759
if(debug){
652
fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %d) on"
653
" port %d\n", name, host_name, ip, interface, port);
760
fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %"
761
PRIdMAX ") on port %" PRIu16 "\n", name, host_name,
762
ip, (intmax_t)interface, port);
654
763
}
655
764
int ret = start_mandos_communication(ip, port, interface, mc);
656
if (ret == 0){
657
exit(EXIT_SUCCESS);
765
if(ret == 0){
766
avahi_simple_poll_quit(mc->simple_poll);
658
767
}
659
768
}
660
769
}
661
770
avahi_s_service_resolver_free(r);
662
771
}
663
772
664
static void browse_callback( AvahiSServiceBrowser *b,
665
AvahiIfIndex interface,
666
AvahiProtocol protocol,
667
AvahiBrowserEvent event,
668
const char *name,
669
const char *type,
670
const char *domain,
671
AVAHI_GCC_UNUSED AvahiLookupResultFlags
672
flags,
673
void* userdata) {
773
static void browse_callback(AvahiSServiceBrowser *b,
774
AvahiIfIndex interface,
775
AvahiProtocol protocol,
776
AvahiBrowserEvent event,
777
const char *name,
778
const char *type,
779
const char *domain,
780
AVAHI_GCC_UNUSED AvahiLookupResultFlags
781
flags,
782
void* userdata){
674
783
mandos_context *mc = userdata;
675
assert(b); /* Spurious warning */
784
assert(b);
676
785
677
786
/* Called whenever a new services becomes available on the LAN or
678
787
is removed from the LAN */
679
788
680
switch (event) {
789
switch(event){
681
790
default:
682
791
case AVAHI_BROWSER_FAILURE:
683
792
692
801
the callback function is called the Avahi server will free the
693
802
resolver for us. */
694
803
695
if (!(avahi_s_service_resolver_new(mc->server, interface,
804
if(!(avahi_s_service_resolver_new(mc->server, interface,
696
805
protocol, name, type, domain,
697
806
AVAHI_PROTO_INET6, 0,
698
807
resolve_callback, mc)))
712
821
}
713
822
}
714
823
715
/* Combines file name and path and returns the malloced new
716
string. some sane checks could/should be added */
717
static const char *combinepath(const char *first, const char *second){
718
size_t f_len = strlen(first);
719
size_t s_len = strlen(second);
720
char *tmp = malloc(f_len + s_len + 2);
721
if (tmp == NULL){
722
return NULL;
723
}
724
if(f_len > 0){
725
memcpy(tmp, first, f_len); /* Spurious warning */
726
}
727
tmp[f_len] = '/';
728
if(s_len > 0){
729
memcpy(tmp + f_len + 1, second, s_len); /* Spurious warning */
730
}
731
tmp[f_len + 1 + s_len] = '\0';
732
return tmp;
733
}
734
735
736
824
int main(int argc, char *argv[]){
737
AvahiSServiceBrowser *sb = NULL;
738
int error;
739
int ret;
740
int exitcode = EXIT_SUCCESS;
741
const char *interface = "eth0";
742
struct ifreq network;
743
int sd;
744
uid_t uid;
745
gid_t gid;
746
char *connect_to = NULL;
747
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
748
const char *pubkeyfile = "pubkey.txt";
749
const char *seckeyfile = "seckey.txt";
750
mandos_context mc = { .simple_poll = NULL, .server = NULL,
751
.dh_bits = 1024, .priority = "SECURE256"};
752
bool gnutls_initalized = false;
753
754
{
755
struct argp_option options[] = {
756
{ .name = "debug", .key = 128,
757
.doc = "Debug mode", .group = 3 },
758
{ .name = "connect", .key = 'c',
759
.arg = "IP",
760
.doc = "Connect directly to a sepcified mandos server",
761
.group = 1 },
762
{ .name = "interface", .key = 'i',
763
.arg = "INTERFACE",
764
.doc = "Interface that Avahi will conntect through",
765
.group = 1 },
766
{ .name = "keydir", .key = 'd',
767
.arg = "KEYDIR",
768
.doc = "Directory where the openpgp keyring is",
769
.group = 1 },
770
{ .name = "seckey", .key = 's',
771
.arg = "SECKEY",
772
.doc = "Secret openpgp key for gnutls authentication",
773
.group = 1 },
774
{ .name = "pubkey", .key = 'p',
775
.arg = "PUBKEY",
776
.doc = "Public openpgp key for gnutls authentication",
777
.group = 2 },
778
{ .name = "dh-bits", .key = 129,
779
.arg = "BITS",
780
.doc = "dh-bits to use in gnutls communication",
781
.group = 2 },
782
{ .name = "priority", .key = 130,
783
.arg = "PRIORITY",
784
.doc = "GNUTLS priority", .group = 1 },
785
{ .name = NULL }
786
};
787
788
789
error_t parse_opt (int key, char *arg,
790
struct argp_state *state) {
791
/* Get the INPUT argument from `argp_parse', which we know is
792
a pointer to our plugin list pointer. */
793
switch (key) {
794
case 128:
795
debug = true;
796
break;
797
case 'c':
798
connect_to = arg;
799
break;
800
case 'i':
801
interface = arg;
802
break;
803
case 'd':
804
keydir = arg;
805
break;
806
case 's':
807
seckeyfile = arg;
808
break;
809
case 'p':
810
pubkeyfile = arg;
811
break;
812
case 129:
813
errno = 0;
814
mc.dh_bits = (unsigned int) strtol(arg, NULL, 10);
815
if (errno){
816
perror("strtol");
817
exit(EXIT_FAILURE);
818
}
819
break;
820
case 130:
821
mc.priority = arg;
822
break;
823
case ARGP_KEY_ARG:
824
argp_usage (state);
825
break;
826
case ARGP_KEY_END:
827
break;
828
default:
829
return ARGP_ERR_UNKNOWN;
830
}
831
return 0;
832
}
833
834
struct argp argp = { .options = options, .parser = parse_opt,
835
.args_doc = "",
836
.doc = "Mandos client -- Get and decrypt"
837
" passwords from mandos server" };
838
argp_parse (&argp, argc, argv, 0, 0, NULL);
839
}
840
841
pubkeyfile = combinepath(keydir, pubkeyfile);
842
if (pubkeyfile == NULL){
843
perror("combinepath");
844
exitcode = EXIT_FAILURE;
845
goto end;
846
}
847
848
seckeyfile = combinepath(keydir, seckeyfile);
849
if (seckeyfile == NULL){
850
perror("combinepath");
851
goto end;
852
}
853
854
ret = init_gnutls_global(&mc, pubkeyfile, seckeyfile);
855
if (ret == -1){
856
fprintf(stderr, "init_gnutls_global\n");
857
goto end;
858
} else {
859
gnutls_initalized = true;
860
}
861
862
uid = getuid();
863
gid = getgid();
864
865
ret = setuid(uid);
866
if (ret == -1){
867
perror("setuid");
868
}
869
870
setgid(gid);
871
if (ret == -1){
872
perror("setgid");
873
}
874
875
if_index = (AvahiIfIndex) if_nametoindex(interface);
876
if(if_index == 0){
877
fprintf(stderr, "No such interface: \"%s\"\n", interface);
878
exit(EXIT_FAILURE);
879
}
880
881
if(connect_to != NULL){
882
/* Connect directly, do not use Zeroconf */
883
/* (Mainly meant for debugging) */
884
char *address = strrchr(connect_to, ':');
885
if(address == NULL){
886
fprintf(stderr, "No colon in address\n");
887
exitcode = EXIT_FAILURE;
888
goto end;
889
}
890
errno = 0;
891
uint16_t port = (uint16_t) strtol(address+1, NULL, 10);
892
if(errno){
893
perror("Bad port number");
894
exitcode = EXIT_FAILURE;
895
goto end;
896
}
897
*address = '\0';
898
address = connect_to;
899
ret = start_mandos_communication(address, port, if_index, &mc);
900
if(ret < 0){
901
exitcode = EXIT_FAILURE;
902
} else {
903
exitcode = EXIT_SUCCESS;
904
}
905
goto end;
906
}
907
908
/* If the interface is down, bring it up */
909
{
910
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
911
if(sd < 0) {
912
perror("socket");
913
exitcode = EXIT_FAILURE;
914
goto end;
915
}
916
strcpy(network.ifr_name, interface); /* Spurious warning */
825
AvahiSServiceBrowser *sb = NULL;
826
int error;
827
int ret;
828
intmax_t tmpmax;
829
int numchars;
830
int exitcode = EXIT_SUCCESS;
831
const char *interface = "eth0";
832
struct ifreq network;
833
int sd;
834
uid_t uid;
835
gid_t gid;
836
char *connect_to = NULL;
837
char tempdir[] = "/tmp/mandosXXXXXX";
838
bool tempdir_created = false;
839
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
840
const char *seckey = PATHDIR "/" SECKEY;
841
const char *pubkey = PATHDIR "/" PUBKEY;
842
843
mandos_context mc = { .simple_poll = NULL, .server = NULL,
844
.dh_bits = 1024, .priority = "SECURE256"
845
":!CTYPE-X.509:+CTYPE-OPENPGP" };
846
bool gnutls_initialized = false;
847
bool gpgme_initialized = false;
848
double delay = 2.5;
849
850
{
851
struct argp_option options[] = {
852
{ .name = "debug", .key = 128,
853
.doc = "Debug mode", .group = 3 },
854
{ .name = "connect", .key = 'c',
855
.arg = "ADDRESS:PORT",
856
.doc = "Connect directly to a specific Mandos server",
857
.group = 1 },
858
{ .name = "interface", .key = 'i',
859
.arg = "NAME",
860
.doc = "Interface that will be used to search for Mandos"
861
" servers",
862
.group = 1 },
863
{ .name = "seckey", .key = 's',
864
.arg = "FILE",
865
.doc = "OpenPGP secret key file base name",
866
.group = 1 },
867
{ .name = "pubkey", .key = 'p',
868
.arg = "FILE",
869
.doc = "OpenPGP public key file base name",
870
.group = 2 },
871
{ .name = "dh-bits", .key = 129,
872
.arg = "BITS",
873
.doc = "Bit length of the prime number used in the"
874
" Diffie-Hellman key exchange",
875
.group = 2 },
876
{ .name = "priority", .key = 130,
877
.arg = "STRING",
878
.doc = "GnuTLS priority string for the TLS handshake",
879
.group = 1 },
880
{ .name = "delay", .key = 131,
881
.arg = "SECONDS",
882
.doc = "Maximum delay to wait for interface startup",
883
.group = 2 },
884
{ .name = NULL }
885
};
886
887
error_t parse_opt(int key, char *arg,
888
struct argp_state *state){
889
switch(key){
890
case 128: /* --debug */
891
debug = true;
892
break;
893
case 'c': /* --connect */
894
connect_to = arg;
895
break;
896
case 'i': /* --interface */
897
interface = arg;
898
break;
899
case 's': /* --seckey */
900
seckey = arg;
901
break;
902
case 'p': /* --pubkey */
903
pubkey = arg;
904
break;
905
case 129: /* --dh-bits */
906
ret = sscanf(arg, "%" SCNdMAX "%n", &tmpmax, &numchars);
907
if(ret < 1 or tmpmax != (typeof(mc.dh_bits))tmpmax
908
or arg[numchars] != '\0'){
909
fprintf(stderr, "Bad number of DH bits\n");
910
exit(EXIT_FAILURE);
911
}
912
mc.dh_bits = (typeof(mc.dh_bits))tmpmax;
913
break;
914
case 130: /* --priority */
915
mc.priority = arg;
916
break;
917
case 131: /* --delay */
918
ret = sscanf(arg, "%lf%n", &delay, &numchars);
919
if(ret < 1 or arg[numchars] != '\0'){
920
fprintf(stderr, "Bad delay\n");
921
exit(EXIT_FAILURE);
922
}
923
break;
924
case ARGP_KEY_ARG:
925
argp_usage(state);
926
case ARGP_KEY_END:
927
break;
928
default:
929
return ARGP_ERR_UNKNOWN;
930
}
931
return 0;
932
}
933
934
struct argp argp = { .options = options, .parser = parse_opt,
935
.args_doc = "",
936
.doc = "Mandos client -- Get and decrypt"
937
" passwords from a Mandos server" };
938
ret = argp_parse(&argp, argc, argv, 0, 0, NULL);
939
if(ret == ARGP_ERR_UNKNOWN){
940
fprintf(stderr, "Unknown error while parsing arguments\n");
941
exitcode = EXIT_FAILURE;
942
goto end;
943
}
944
}
945
946
/* If the interface is down, bring it up */
947
{
948
#ifdef __linux__
949
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
950
messages to mess up the prompt */
951
ret = klogctl(8, NULL, 5);
952
if(ret == -1){
953
perror("klogctl");
954
}
955
#endif
956
957
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
958
if(sd < 0){
959
perror("socket");
960
exitcode = EXIT_FAILURE;
961
#ifdef __linux__
962
ret = klogctl(7, NULL, 0);
963
if(ret == -1){
964
perror("klogctl");
965
}
966
#endif
967
goto end;
968
}
969
strcpy(network.ifr_name, interface);
970
ret = ioctl(sd, SIOCGIFFLAGS, &network);
971
if(ret == -1){
972
perror("ioctl SIOCGIFFLAGS");
973
#ifdef __linux__
974
ret = klogctl(7, NULL, 0);
975
if(ret == -1){
976
perror("klogctl");
977
}
978
#endif
979
exitcode = EXIT_FAILURE;
980
goto end;
981
}
982
if((network.ifr_flags & IFF_UP) == 0){
983
network.ifr_flags |= IFF_UP;
984
ret = ioctl(sd, SIOCSIFFLAGS, &network);
985
if(ret == -1){
986
perror("ioctl SIOCSIFFLAGS");
987
exitcode = EXIT_FAILURE;
988
#ifdef __linux__
989
ret = klogctl(7, NULL, 0);
990
if(ret == -1){
991
perror("klogctl");
992
}
993
#endif
994
goto end;
995
}
996
}
997
/* sleep checking until interface is running */
998
for(int i=0; i < delay * 4; i++){
917
999
ret = ioctl(sd, SIOCGIFFLAGS, &network);
918
1000
if(ret == -1){
919
1001
perror("ioctl SIOCGIFFLAGS");
920
exitcode = EXIT_FAILURE;
921
goto end;
922
}
923
if((network.ifr_flags & IFF_UP) == 0){
924
network.ifr_flags |= IFF_UP;
925
ret = ioctl(sd, SIOCSIFFLAGS, &network);
926
if(ret == -1){
927
perror("ioctl SIOCSIFFLAGS");
928
exitcode = EXIT_FAILURE;
929
goto end;
930
}
931
}
932
close(sd);
933
}
934
935
if (not debug){
936
avahi_set_log_function(empty_log);
937
}
938
939
/* Initialize the pseudo-RNG for Avahi */
940
srand((unsigned int) time(NULL));
941
942
/* Allocate main Avahi loop object */
943
mc.simple_poll = avahi_simple_poll_new();
944
if (mc.simple_poll == NULL) {
945
fprintf(stderr, "Avahi: Failed to create simple poll"
946
" object.\n");
947
exitcode = EXIT_FAILURE;
948
goto end;
949
}
950
951
{
952
AvahiServerConfig config;
953
/* Do not publish any local Zeroconf records */
954
avahi_server_config_init(&config);
955
config.publish_hinfo = 0;
956
config.publish_addresses = 0;
957
config.publish_workstation = 0;
958
config.publish_domain = 0;
959
960
/* Allocate a new server */
961
mc.server = avahi_server_new(avahi_simple_poll_get
962
(mc.simple_poll), &config, NULL,
963
NULL, &error);
964
965
/* Free the Avahi configuration data */
966
avahi_server_config_free(&config);
967
}
968
969
/* Check if creating the Avahi server object succeeded */
970
if (mc.server == NULL) {
971
fprintf(stderr, "Failed to create Avahi server: %s\n",
972
avahi_strerror(error));
973
exitcode = EXIT_FAILURE;
974
goto end;
975
}
976
977
/* Create the Avahi service browser */
978
sb = avahi_s_service_browser_new(mc.server, if_index,
979
AVAHI_PROTO_INET6,
980
"_mandos._tcp", NULL, 0,
981
browse_callback, &mc);
982
if (sb == NULL) {
983
fprintf(stderr, "Failed to create service browser: %s\n",
984
avahi_strerror(avahi_server_errno(mc.server)));
985
exitcode = EXIT_FAILURE;
986
goto end;
987
}
988
989
/* Run the main loop */
990
991
if (debug){
992
fprintf(stderr, "Starting Avahi loop search\n");
993
}
994
995
avahi_simple_poll_loop(mc.simple_poll);
996
1002
} else if(network.ifr_flags & IFF_RUNNING){
1003
break;
1004
}
1005
struct timespec sleeptime = { .tv_nsec = 250000000 };
1006
ret = nanosleep(&sleeptime, NULL);
1007
if(ret == -1 and errno != EINTR){
1008
perror("nanosleep");
1009
}
1010
}
1011
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1012
if(ret == -1){
1013
perror("close");
1014
}
1015
#ifdef __linux__
1016
/* Restores kernel loglevel to default */
1017
ret = klogctl(7, NULL, 0);
1018
if(ret == -1){
1019
perror("klogctl");
1020
}
1021
#endif
1022
}
1023
1024
uid = getuid();
1025
gid = getgid();
1026
1027
setgid(gid);
1028
if(ret == -1){
1029
perror("setgid");
1030
}
1031
1032
ret = setuid(uid);
1033
if(ret == -1){
1034
perror("setuid");
1035
}
1036
1037
ret = init_gnutls_global(&mc, pubkey, seckey);
1038
if(ret == -1){
1039
fprintf(stderr, "init_gnutls_global failed\n");
1040
exitcode = EXIT_FAILURE;
1041
goto end;
1042
} else {
1043
gnutls_initialized = true;
1044
}
1045
1046
if(mkdtemp(tempdir) == NULL){
1047
perror("mkdtemp");
1048
goto end;
1049
}
1050
tempdir_created = true;
1051
1052
if(not init_gpgme(&mc, pubkey, seckey, tempdir)){
1053
fprintf(stderr, "init_gpgme failed\n");
1054
exitcode = EXIT_FAILURE;
1055
goto end;
1056
} else {
1057
gpgme_initialized = true;
1058
}
1059
1060
if_index = (AvahiIfIndex) if_nametoindex(interface);
1061
if(if_index == 0){
1062
fprintf(stderr, "No such interface: \"%s\"\n", interface);
1063
exitcode = EXIT_FAILURE;
1064
goto end;
1065
}
1066
1067
if(connect_to != NULL){
1068
/* Connect directly, do not use Zeroconf */
1069
/* (Mainly meant for debugging) */
1070
char *address = strrchr(connect_to, ':');
1071
if(address == NULL){
1072
fprintf(stderr, "No colon in address\n");
1073
exitcode = EXIT_FAILURE;
1074
goto end;
1075
}
1076
uint16_t port;
1077
ret = sscanf(address+1, "%" SCNdMAX "%n", &tmpmax, &numchars);
1078
if(ret < 1 or tmpmax != (uint16_t)tmpmax
1079
or address[numchars+1] != '\0'){
1080
fprintf(stderr, "Bad port number\n");
1081
exitcode = EXIT_FAILURE;
1082
goto end;
1083
}
1084
port = (uint16_t)tmpmax;
1085
*address = '\0';
1086
address = connect_to;
1087
ret = start_mandos_communication(address, port, if_index, &mc);
1088
if(ret < 0){
1089
exitcode = EXIT_FAILURE;
1090
} else {
1091
exitcode = EXIT_SUCCESS;
1092
}
1093
goto end;
1094
}
1095
1096
if(not debug){
1097
avahi_set_log_function(empty_log);
1098
}
1099
1100
/* Initialize the pseudo-RNG for Avahi */
1101
srand((unsigned int) time(NULL));
1102
1103
/* Allocate main Avahi loop object */
1104
mc.simple_poll = avahi_simple_poll_new();
1105
if(mc.simple_poll == NULL){
1106
fprintf(stderr, "Avahi: Failed to create simple poll object.\n");
1107
exitcode = EXIT_FAILURE;
1108
goto end;
1109
}
1110
1111
{
1112
AvahiServerConfig config;
1113
/* Do not publish any local Zeroconf records */
1114
avahi_server_config_init(&config);
1115
config.publish_hinfo = 0;
1116
config.publish_addresses = 0;
1117
config.publish_workstation = 0;
1118
config.publish_domain = 0;
1119
1120
/* Allocate a new server */
1121
mc.server = avahi_server_new(avahi_simple_poll_get
1122
(mc.simple_poll), &config, NULL,
1123
NULL, &error);
1124
1125
/* Free the Avahi configuration data */
1126
avahi_server_config_free(&config);
1127
}
1128
1129
/* Check if creating the Avahi server object succeeded */
1130
if(mc.server == NULL){
1131
fprintf(stderr, "Failed to create Avahi server: %s\n",
1132
avahi_strerror(error));
1133
exitcode = EXIT_FAILURE;
1134
goto end;
1135
}
1136
1137
/* Create the Avahi service browser */
1138
sb = avahi_s_service_browser_new(mc.server, if_index,
1139
AVAHI_PROTO_INET6, "_mandos._tcp",
1140
NULL, 0, browse_callback, &mc);
1141
if(sb == NULL){
1142
fprintf(stderr, "Failed to create service browser: %s\n",
1143
avahi_strerror(avahi_server_errno(mc.server)));
1144
exitcode = EXIT_FAILURE;
1145
goto end;
1146
}
1147
1148
/* Run the main loop */
1149
1150
if(debug){
1151
fprintf(stderr, "Starting Avahi loop search\n");
1152
}
1153
1154
avahi_simple_poll_loop(mc.simple_poll);
1155
997
1156
end:
998
999
if (debug){
1000
fprintf(stderr, "%s exiting\n", argv[0]);
1001
}
1002
1003
/* Cleanup things */
1004
if (sb != NULL)
1005
avahi_s_service_browser_free(sb);
1006
1007
if (mc.server != NULL)
1008
avahi_server_free(mc.server);
1009
1010
if (mc.simple_poll != NULL)
1011
avahi_simple_poll_free(mc.simple_poll);
1012
free(pubkeyfile);
1013
free(seckeyfile);
1014
1015
if (gnutls_initalized){
1016
gnutls_certificate_free_credentials (mc.cred);
1017
gnutls_global_deinit ();
1018
}
1019
1020
return exitcode;
1157
1158
if(debug){
1159
fprintf(stderr, "%s exiting\n", argv[0]);
1160
}
1161
1162
/* Cleanup things */
1163
if(sb != NULL)
1164
avahi_s_service_browser_free(sb);
1165
1166
if(mc.server != NULL)
1167
avahi_server_free(mc.server);
1168
1169
if(mc.simple_poll != NULL)
1170
avahi_simple_poll_free(mc.simple_poll);
1171
1172
if(gnutls_initialized){
1173
gnutls_certificate_free_credentials(mc.cred);
1174
gnutls_global_deinit();
1175
gnutls_dh_params_deinit(mc.dh_params);
1176
}
1177
1178
if(gpgme_initialized){
1179
gpgme_release(mc.ctx);
1180
}
1181
1182
/* Removes the temp directory used by GPGME */
1183
if(tempdir_created){
1184
DIR *d;
1185
struct dirent *direntry;
1186
d = opendir(tempdir);
1187
if(d == NULL){
1188
if(errno != ENOENT){
1189
perror("opendir");
1190
}
1191
} else {
1192
while(true){
1193
direntry = readdir(d);
1194
if(direntry == NULL){
1195
break;
1196
}
1197
/* Skip "." and ".." */
1198
if(direntry->d_name[0] == '.'
1199
and (direntry->d_name[1] == '\0'
1200
or (direntry->d_name[1] == '.'
1201
and direntry->d_name[2] == '\0'))){
1202
continue;
1203
}
1204
char *fullname = NULL;
1205
ret = asprintf(&fullname, "%s/%s", tempdir,
1206
direntry->d_name);
1207
if(ret < 0){
1208
perror("asprintf");
1209
continue;
1210
}
1211
ret = remove(fullname);
1212
if(ret == -1){
1213
fprintf(stderr, "remove(\"%s\"): %s\n", fullname,
1214
strerror(errno));
1215
}
1216
free(fullname);
1217
}
1218
closedir(d);
1219
}
1220
ret = rmdir(tempdir);
1221
if(ret == -1 and errno != ENOENT){
1222
perror("rmdir");
1223
}
1224
}
1225
1226
return exitcode;
1021
1227
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0