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- Committer: Teddy Hogeborn
- Date: 2009-01-08 03:54:06 UTC
- Revision ID: teddy@fukt.bsnet.se-20090108035406-01uqkv9xqgxlnw7c
Change the default value of the "checker" option command to make the
checker command be run-time dependent on the "host" client attribute
instead of reading it only once on startup:
* clients.conf (checker): Changed default commented-out value to
"fping -q -- %%(host)s".
* mandos (main): Changed default value for the "checker" config option
to "fping -q -- %%(host)s".
* mandos-clients.conf.xml (OPTIONS): Document changed default value.
(EXAMPLE): Changed value of "checker".
* plugins.d/password-prompt.c: Whitespace changes only.
checker command be run-time dependent on the "host" client attribute
instead of reading it only once on startup:
* clients.conf (checker): Changed default commented-out value to
"fping -q -- %%(host)s".
* mandos (main): Changed default value for the "checker" config option
to "fping -q -- %%(host)s".
* mandos-clients.conf.xml (OPTIONS): Document changed default value.
(EXAMPLE): Changed value of "checker".
* plugins.d/password-prompt.c: Whitespace changes only.
- files removed:
- debian/watch
- files renamed:
- mandos-ctl => mandos-list
- files modified:
- INSTALL
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
36
36
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), asprintf() */
37
37
38
38
#include <stdio.h> /* fprintf(), stderr, fwrite(),
39
stdout, ferror(), sscanf(),
40
remove() */
39
stdout, ferror() */
41
40
#include <stdint.h> /* uint16_t, uint32_t */
42
41
#include <stddef.h> /* NULL, size_t, ssize_t */
43
42
#include <stdlib.h> /* free(), EXIT_SUCCESS, EXIT_FAILURE,
44
43
srand() */
45
#include <stdbool.h> /* bool, false, true */
44
#include <stdbool.h> /* bool, true */
46
45
#include <string.h> /* memset(), strcmp(), strlen(),
47
46
strerror(), asprintf(), strcpy() */
48
#include <sys/ioctl.h> /* ioctl */
47
#include <sys/ioctl.h> /* ioctl */
49
48
#include <sys/types.h> /* socket(), inet_pton(), sockaddr,
50
49
sockaddr_in6, PF_INET6,
51
SOCK_STREAM, uid_t, gid_t, open(),
52
opendir(), DIR */
50
SOCK_STREAM, INET6_ADDRSTRLEN,
51
uid_t, gid_t, open(), opendir(), DIR */
53
52
#include <sys/stat.h> /* open() */
54
53
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
55
inet_pton(), connect() */
54
struct in6_addr, inet_pton(),
55
connect() */
56
56
#include <fcntl.h> /* open() */
57
#include <dirent.h> /* opendir(), struct dirent, readdir()
58
*/
59
#include <inttypes.h> /* PRIu16, intmax_t, SCNdMAX */
57
#include <dirent.h> /* opendir(), struct dirent, readdir() */
58
#include <inttypes.h> /* PRIu16 */
60
59
#include <assert.h> /* assert() */
61
60
#include <errno.h> /* perror(), errno */
62
#include <time.h> /* nanosleep(), time() */
61
#include <time.h> /* time() */
63
62
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
64
63
SIOCSIFFLAGS, if_indextoname(),
65
64
if_nametoindex(), IF_NAMESIZE */
66
#include <netinet/in.h> /* IN6_IS_ADDR_LINKLOCAL,
67
INET_ADDRSTRLEN, INET6_ADDRSTRLEN
68
*/
65
#include <netinet/in.h>
69
66
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
70
67
getuid(), getgid(), setuid(),
71
68
setgid() */
72
69
#include <arpa/inet.h> /* inet_pton(), htons */
73
#include <iso646.h> /* not, or, and */
70
#include <iso646.h> /* not, and */
74
71
#include <argp.h> /* struct argp_option, error_t, struct
75
72
argp_state, struct argp,
76
73
argp_parse(), ARGP_KEY_ARG,
77
74
ARGP_KEY_END, ARGP_ERR_UNKNOWN */
78
#include <signal.h> /* sigemptyset(), sigaddset(),
79
sigaction(), SIGTERM, sigaction */
80
81
#ifdef __linux__
82
#include <sys/klog.h> /* klogctl() */
83
#endif
84
75
85
76
/* Avahi */
86
77
/* All Avahi types, constants and functions
99
90
gnutls_*
100
91
init_gnutls_session(),
101
92
GNUTLS_* */
102
#include <gnutls/openpgp.h>
103
/* gnutls_certificate_set_openpgp_key_file(),
93
#include <gnutls/openpgp.h> /* gnutls_certificate_set_openpgp_key_file(),
104
94
GNUTLS_OPENPGP_FMT_BASE64 */
105
95
106
96
/* GPGME */
132
122
gpgme_ctx_t ctx;
133
123
} mandos_context;
134
124
135
/* global context so signal handler can reach it*/
136
mandos_context mc;
137
138
125
/*
139
* Make additional room in "buffer" for at least BUFFER_SIZE
140
* additional bytes. "buffer_capacity" is how much is currently
141
* allocated, "buffer_length" is how much is already used.
126
* Make room in "buffer" for at least BUFFER_SIZE additional bytes.
127
* "buffer_capacity" is how much is currently allocated,
128
* "buffer_length" is how much is already used.
142
129
*/
143
size_t incbuffer(char **buffer, size_t buffer_length,
130
size_t adjustbuffer(char **buffer, size_t buffer_length,
144
131
size_t buffer_capacity){
145
if(buffer_length + BUFFER_SIZE > buffer_capacity){
132
if (buffer_length + BUFFER_SIZE > buffer_capacity){
146
133
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
147
if(buffer == NULL){
134
if (buffer == NULL){
148
135
return 0;
149
136
}
150
137
buffer_capacity += BUFFER_SIZE;
155
142
/*
156
143
* Initialize GPGME.
157
144
*/
158
static bool init_gpgme(const char *seckey,
145
static bool init_gpgme(mandos_context *mc, const char *seckey,
159
146
const char *pubkey, const char *tempdir){
160
147
int ret;
161
148
gpgme_error_t rc;
163
150
164
151
165
152
/*
166
* Helper function to insert pub and seckey to the engine keyring.
153
* Helper function to insert pub and seckey to the enigne keyring.
167
154
*/
168
155
bool import_key(const char *filename){
169
156
int fd;
170
157
gpgme_data_t pgp_data;
171
158
172
fd = (int)TEMP_FAILURE_RETRY(open(filename, O_RDONLY));
159
fd = TEMP_FAILURE_RETRY(open(filename, O_RDONLY));
173
160
if(fd == -1){
174
161
perror("open");
175
162
return false;
176
163
}
177
164
178
165
rc = gpgme_data_new_from_fd(&pgp_data, fd);
179
if(rc != GPG_ERR_NO_ERROR){
166
if (rc != GPG_ERR_NO_ERROR){
180
167
fprintf(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
181
168
gpgme_strsource(rc), gpgme_strerror(rc));
182
169
return false;
183
170
}
184
171
185
rc = gpgme_op_import(mc.ctx, pgp_data);
186
if(rc != GPG_ERR_NO_ERROR){
172
rc = gpgme_op_import(mc->ctx, pgp_data);
173
if (rc != GPG_ERR_NO_ERROR){
187
174
fprintf(stderr, "bad gpgme_op_import: %s: %s\n",
188
175
gpgme_strsource(rc), gpgme_strerror(rc));
189
176
return false;
190
177
}
191
178
192
ret = (int)TEMP_FAILURE_RETRY(close(fd));
179
ret = TEMP_FAILURE_RETRY(close(fd));
193
180
if(ret == -1){
194
181
perror("close");
195
182
}
197
184
return true;
198
185
}
199
186
200
if(debug){
201
fprintf(stderr, "Initializing GPGME\n");
187
if (debug){
188
fprintf(stderr, "Initialize gpgme\n");
202
189
}
203
190
204
191
/* Init GPGME */
205
192
gpgme_check_version(NULL);
206
193
rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
207
if(rc != GPG_ERR_NO_ERROR){
194
if (rc != GPG_ERR_NO_ERROR){
208
195
fprintf(stderr, "bad gpgme_engine_check_version: %s: %s\n",
209
196
gpgme_strsource(rc), gpgme_strerror(rc));
210
197
return false;
211
198
}
212
199
213
200
/* Set GPGME home directory for the OpenPGP engine only */
214
rc = gpgme_get_engine_info(&engine_info);
215
if(rc != GPG_ERR_NO_ERROR){
201
rc = gpgme_get_engine_info (&engine_info);
202
if (rc != GPG_ERR_NO_ERROR){
216
203
fprintf(stderr, "bad gpgme_get_engine_info: %s: %s\n",
217
204
gpgme_strsource(rc), gpgme_strerror(rc));
218
205
return false;
231
218
}
232
219
233
220
/* Create new GPGME "context" */
234
rc = gpgme_new(&(mc.ctx));
235
if(rc != GPG_ERR_NO_ERROR){
221
rc = gpgme_new(&(mc->ctx));
222
if (rc != GPG_ERR_NO_ERROR){
236
223
fprintf(stderr, "bad gpgme_new: %s: %s\n",
237
224
gpgme_strsource(rc), gpgme_strerror(rc));
238
225
return false;
239
226
}
240
227
241
if(not import_key(pubkey) or not import_key(seckey)){
228
if (not import_key(pubkey) or not import_key(seckey)){
242
229
return false;
243
230
}
244
231
249
236
* Decrypt OpenPGP data.
250
237
* Returns -1 on error
251
238
*/
252
static ssize_t pgp_packet_decrypt(const char *cryptotext,
253
size_t crypto_size,
254
char **plaintext){
239
static ssize_t pgp_packet_decrypt (const mandos_context *mc,
240
const char *cryptotext,
241
size_t crypto_size,
242
char **plaintext){
255
243
gpgme_data_t dh_crypto, dh_plain;
256
244
gpgme_error_t rc;
257
245
ssize_t ret;
258
246
size_t plaintext_capacity = 0;
259
247
ssize_t plaintext_length = 0;
260
248
261
if(debug){
249
if (debug){
262
250
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
263
251
}
264
252
265
253
/* Create new GPGME data buffer from memory cryptotext */
266
254
rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,
267
255
0);
268
if(rc != GPG_ERR_NO_ERROR){
256
if (rc != GPG_ERR_NO_ERROR){
269
257
fprintf(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
270
258
gpgme_strsource(rc), gpgme_strerror(rc));
271
259
return -1;
273
261
274
262
/* Create new empty GPGME data buffer for the plaintext */
275
263
rc = gpgme_data_new(&dh_plain);
276
if(rc != GPG_ERR_NO_ERROR){
264
if (rc != GPG_ERR_NO_ERROR){
277
265
fprintf(stderr, "bad gpgme_data_new: %s: %s\n",
278
266
gpgme_strsource(rc), gpgme_strerror(rc));
279
267
gpgme_data_release(dh_crypto);
282
270
283
271
/* Decrypt data from the cryptotext data buffer to the plaintext
284
272
data buffer */
285
rc = gpgme_op_decrypt(mc.ctx, dh_crypto, dh_plain);
286
if(rc != GPG_ERR_NO_ERROR){
273
rc = gpgme_op_decrypt(mc->ctx, dh_crypto, dh_plain);
274
if (rc != GPG_ERR_NO_ERROR){
287
275
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
288
276
gpgme_strsource(rc), gpgme_strerror(rc));
289
277
plaintext_length = -1;
290
if(debug){
278
if (debug){
291
279
gpgme_decrypt_result_t result;
292
result = gpgme_op_decrypt_result(mc.ctx);
293
if(result == NULL){
280
result = gpgme_op_decrypt_result(mc->ctx);
281
if (result == NULL){
294
282
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
295
283
} else {
296
284
fprintf(stderr, "Unsupported algorithm: %s\n",
323
311
}
324
312
325
313
/* Seek back to the beginning of the GPGME plaintext data buffer */
326
if(gpgme_data_seek(dh_plain, (off_t)0, SEEK_SET) == -1){
314
if (gpgme_data_seek(dh_plain, (off_t) 0, SEEK_SET) == -1){
327
315
perror("gpgme_data_seek");
328
316
plaintext_length = -1;
329
317
goto decrypt_end;
331
319
332
320
*plaintext = NULL;
333
321
while(true){
334
plaintext_capacity = incbuffer(plaintext,
322
plaintext_capacity = adjustbuffer(plaintext,
335
323
(size_t)plaintext_length,
336
324
plaintext_capacity);
337
if(plaintext_capacity == 0){
338
perror("incbuffer");
325
if (plaintext_capacity == 0){
326
perror("adjustbuffer");
339
327
plaintext_length = -1;
340
328
goto decrypt_end;
341
329
}
343
331
ret = gpgme_data_read(dh_plain, *plaintext + plaintext_length,
344
332
BUFFER_SIZE);
345
333
/* Print the data, if any */
346
if(ret == 0){
334
if (ret == 0){
347
335
/* EOF */
348
336
break;
349
337
}
373
361
return plaintext_length;
374
362
}
375
363
376
static const char * safer_gnutls_strerror(int value){
377
const char *ret = gnutls_strerror(value); /* Spurious warning from
378
-Wunreachable-code */
379
if(ret == NULL)
364
static const char * safer_gnutls_strerror (int value) {
365
const char *ret = gnutls_strerror (value); /* Spurious warning */
366
if (ret == NULL)
380
367
ret = "(unknown)";
381
368
return ret;
382
369
}
387
374
fprintf(stderr, "GnuTLS: %s", string);
388
375
}
389
376
390
static int init_gnutls_global(const char *pubkeyfilename,
377
static int init_gnutls_global(mandos_context *mc,
378
const char *pubkeyfilename,
391
379
const char *seckeyfilename){
392
380
int ret;
393
381
396
384
}
397
385
398
386
ret = gnutls_global_init();
399
if(ret != GNUTLS_E_SUCCESS){
400
fprintf(stderr, "GnuTLS global_init: %s\n",
401
safer_gnutls_strerror(ret));
387
if (ret != GNUTLS_E_SUCCESS) {
388
fprintf (stderr, "GnuTLS global_init: %s\n",
389
safer_gnutls_strerror(ret));
402
390
return -1;
403
391
}
404
392
405
if(debug){
393
if (debug){
406
394
/* "Use a log level over 10 to enable all debugging options."
407
395
* - GnuTLS manual
408
396
*/
411
399
}
412
400
413
401
/* OpenPGP credentials */
414
gnutls_certificate_allocate_credentials(&mc.cred);
415
if(ret != GNUTLS_E_SUCCESS){
416
fprintf(stderr, "GnuTLS memory error: %s\n", /* Spurious warning
417
from
418
-Wunreachable-code
419
*/
420
safer_gnutls_strerror(ret));
421
gnutls_global_deinit();
402
gnutls_certificate_allocate_credentials(&mc->cred);
403
if (ret != GNUTLS_E_SUCCESS){
404
fprintf (stderr, "GnuTLS memory error: %s\n", /* Spurious
405
warning */
406
safer_gnutls_strerror(ret));
407
gnutls_global_deinit ();
422
408
return -1;
423
409
}
424
410
429
415
}
430
416
431
417
ret = gnutls_certificate_set_openpgp_key_file
432
(mc.cred, pubkeyfilename, seckeyfilename,
418
(mc->cred, pubkeyfilename, seckeyfilename,
433
419
GNUTLS_OPENPGP_FMT_BASE64);
434
if(ret != GNUTLS_E_SUCCESS){
420
if (ret != GNUTLS_E_SUCCESS) {
435
421
fprintf(stderr,
436
422
"Error[%d] while reading the OpenPGP key pair ('%s',"
437
423
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
441
427
}
442
428
443
429
/* GnuTLS server initialization */
444
ret = gnutls_dh_params_init(&mc.dh_params);
445
if(ret != GNUTLS_E_SUCCESS){
446
fprintf(stderr, "Error in GnuTLS DH parameter initialization:"
447
" %s\n", safer_gnutls_strerror(ret));
430
ret = gnutls_dh_params_init(&mc->dh_params);
431
if (ret != GNUTLS_E_SUCCESS) {
432
fprintf (stderr, "Error in GnuTLS DH parameter initialization:"
433
" %s\n", safer_gnutls_strerror(ret));
448
434
goto globalfail;
449
435
}
450
ret = gnutls_dh_params_generate2(mc.dh_params, mc.dh_bits);
451
if(ret != GNUTLS_E_SUCCESS){
452
fprintf(stderr, "Error in GnuTLS prime generation: %s\n",
453
safer_gnutls_strerror(ret));
436
ret = gnutls_dh_params_generate2(mc->dh_params, mc->dh_bits);
437
if (ret != GNUTLS_E_SUCCESS) {
438
fprintf (stderr, "Error in GnuTLS prime generation: %s\n",
439
safer_gnutls_strerror(ret));
454
440
goto globalfail;
455
441
}
456
442
457
gnutls_certificate_set_dh_params(mc.cred, mc.dh_params);
443
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
458
444
459
445
return 0;
460
446
461
447
globalfail:
462
448
463
gnutls_certificate_free_credentials(mc.cred);
449
gnutls_certificate_free_credentials(mc->cred);
464
450
gnutls_global_deinit();
465
gnutls_dh_params_deinit(mc.dh_params);
451
gnutls_dh_params_deinit(mc->dh_params);
466
452
return -1;
467
453
}
468
454
469
static int init_gnutls_session(gnutls_session_t *session){
455
static int init_gnutls_session(mandos_context *mc,
456
gnutls_session_t *session){
470
457
int ret;
471
458
/* GnuTLS session creation */
472
459
ret = gnutls_init(session, GNUTLS_SERVER);
473
if(ret != GNUTLS_E_SUCCESS){
460
if (ret != GNUTLS_E_SUCCESS){
474
461
fprintf(stderr, "Error in GnuTLS session initialization: %s\n",
475
462
safer_gnutls_strerror(ret));
476
463
}
477
464
478
465
{
479
466
const char *err;
480
ret = gnutls_priority_set_direct(*session, mc.priority, &err);
481
if(ret != GNUTLS_E_SUCCESS){
467
ret = gnutls_priority_set_direct(*session, mc->priority, &err);
468
if (ret != GNUTLS_E_SUCCESS) {
482
469
fprintf(stderr, "Syntax error at: %s\n", err);
483
470
fprintf(stderr, "GnuTLS error: %s\n",
484
471
safer_gnutls_strerror(ret));
485
gnutls_deinit(*session);
472
gnutls_deinit (*session);
486
473
return -1;
487
474
}
488
475
}
489
476
490
477
ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,
491
mc.cred);
492
if(ret != GNUTLS_E_SUCCESS){
478
mc->cred);
479
if (ret != GNUTLS_E_SUCCESS) {
493
480
fprintf(stderr, "Error setting GnuTLS credentials: %s\n",
494
481
safer_gnutls_strerror(ret));
495
gnutls_deinit(*session);
482
gnutls_deinit (*session);
496
483
return -1;
497
484
}
498
485
499
486
/* ignore client certificate if any. */
500
gnutls_certificate_server_set_request(*session,
501
GNUTLS_CERT_IGNORE);
487
gnutls_certificate_server_set_request (*session,
488
GNUTLS_CERT_IGNORE);
502
489
503
gnutls_dh_set_prime_bits(*session, mc.dh_bits);
490
gnutls_dh_set_prime_bits (*session, mc->dh_bits);
504
491
505
492
return 0;
506
493
}
512
499
/* Called when a Mandos server is found */
513
500
static int start_mandos_communication(const char *ip, uint16_t port,
514
501
AvahiIfIndex if_index,
515
int af){
502
mandos_context *mc){
516
503
int ret, tcp_sd;
517
ssize_t sret;
518
union {
519
struct sockaddr_in in;
520
struct sockaddr_in6 in6;
521
} to;
504
union { struct sockaddr in; struct sockaddr_in6 in6; } to;
522
505
char *buffer = NULL;
523
506
char *decrypted_buffer;
524
507
size_t buffer_length = 0;
526
509
ssize_t decrypted_buffer_size;
527
510
size_t written;
528
511
int retval = 0;
512
char interface[IF_NAMESIZE];
529
513
gnutls_session_t session;
530
int pf; /* Protocol family */
531
532
switch(af){
533
case AF_INET6:
534
pf = PF_INET6;
535
break;
536
case AF_INET:
537
pf = PF_INET;
538
break;
539
default:
540
fprintf(stderr, "Bad address family: %d\n", af);
541
return -1;
542
}
543
544
ret = init_gnutls_session(&session);
545
if(ret != 0){
514
515
ret = init_gnutls_session (mc, &session);
516
if (ret != 0){
546
517
return -1;
547
518
}
548
519
549
520
if(debug){
550
fprintf(stderr, "Setting up a TCP connection to %s, port %" PRIu16
521
fprintf(stderr, "Setting up a tcp connection to %s, port %" PRIu16
551
522
"\n", ip, port);
552
523
}
553
524
554
tcp_sd = socket(pf, SOCK_STREAM, 0);
555
if(tcp_sd < 0){
525
tcp_sd = socket(PF_INET6, SOCK_STREAM, 0);
526
if(tcp_sd < 0) {
556
527
perror("socket");
557
528
return -1;
558
529
}
559
530
531
if(debug){
532
if(if_indextoname((unsigned int)if_index, interface) == NULL){
533
perror("if_indextoname");
534
return -1;
535
}
536
fprintf(stderr, "Binding to interface %s\n", interface);
537
}
538
560
539
memset(&to, 0, sizeof(to));
561
if(af == AF_INET6){
562
to.in6.sin6_family = (uint16_t)af;
563
ret = inet_pton(af, ip, &to.in6.sin6_addr);
564
} else { /* IPv4 */
565
to.in.sin_family = (sa_family_t)af;
566
ret = inet_pton(af, ip, &to.in.sin_addr);
567
}
568
if(ret < 0 ){
540
to.in6.sin6_family = AF_INET6;
541
/* It would be nice to have a way to detect if we were passed an
542
IPv4 address here. Now we assume an IPv6 address. */
543
ret = inet_pton(AF_INET6, ip, &to.in6.sin6_addr);
544
if (ret < 0 ){
569
545
perror("inet_pton");
570
546
return -1;
571
547
}
573
549
fprintf(stderr, "Bad address: %s\n", ip);
574
550
return -1;
575
551
}
576
if(af == AF_INET6){
577
to.in6.sin6_port = htons(port); /* Spurious warnings from
578
-Wconversion and
579
-Wunreachable-code */
580
581
if(IN6_IS_ADDR_LINKLOCAL /* Spurious warnings from */
582
(&to.in6.sin6_addr)){ /* -Wstrict-aliasing=2 or lower and
583
-Wunreachable-code*/
584
if(if_index == AVAHI_IF_UNSPEC){
585
fprintf(stderr, "An IPv6 link-local address is incomplete"
586
" without a network interface\n");
587
return -1;
588
}
589
/* Set the network interface number as scope */
590
to.in6.sin6_scope_id = (uint32_t)if_index;
591
}
592
} else {
593
to.in.sin_port = htons(port); /* Spurious warnings from
594
-Wconversion and
595
-Wunreachable-code */
596
}
552
to.in6.sin6_port = htons(port); /* Spurious warning */
553
554
to.in6.sin6_scope_id = (uint32_t)if_index;
597
555
598
556
if(debug){
599
if(af == AF_INET6 and if_index != AVAHI_IF_UNSPEC){
600
char interface[IF_NAMESIZE];
601
if(if_indextoname((unsigned int)if_index, interface) == NULL){
602
perror("if_indextoname");
603
} else {
604
fprintf(stderr, "Connection to: %s%%%s, port %" PRIu16 "\n",
605
ip, interface, port);
606
}
607
} else {
608
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
609
port);
610
}
611
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
612
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
613
const char *pcret;
614
if(af == AF_INET6){
615
pcret = inet_ntop(af, &(to.in6.sin6_addr), addrstr,
616
sizeof(addrstr));
617
} else {
618
pcret = inet_ntop(af, &(to.in.sin_addr), addrstr,
619
sizeof(addrstr));
620
}
621
if(pcret == NULL){
557
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
558
port);
559
char addrstr[INET6_ADDRSTRLEN] = "";
560
if(inet_ntop(to.in6.sin6_family, &(to.in6.sin6_addr), addrstr,
561
sizeof(addrstr)) == NULL){
622
562
perror("inet_ntop");
623
563
} else {
624
564
if(strcmp(addrstr, ip) != 0){
627
567
}
628
568
}
629
569
630
if(af == AF_INET6){
631
ret = connect(tcp_sd, &to.in6, sizeof(to));
632
} else {
633
ret = connect(tcp_sd, &to.in, sizeof(to)); /* IPv4 */
634
}
635
if(ret < 0){
570
ret = connect(tcp_sd, &to.in, sizeof(to));
571
if (ret < 0){
636
572
perror("connect");
637
573
return -1;
638
574
}
639
575
640
576
const char *out = mandos_protocol_version;
641
577
written = 0;
642
while(true){
578
while (true){
643
579
size_t out_size = strlen(out);
644
ret = (int)TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
580
ret = TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
645
581
out_size - written));
646
if(ret == -1){
582
if (ret == -1){
647
583
perror("write");
648
584
retval = -1;
649
585
goto mandos_end;
652
588
if(written < out_size){
653
589
continue;
654
590
} else {
655
if(out == mandos_protocol_version){
591
if (out == mandos_protocol_version){
656
592
written = 0;
657
593
out = "\r\n";
658
594
} else {
665
601
fprintf(stderr, "Establishing TLS session with %s\n", ip);
666
602
}
667
603
668
gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t) tcp_sd);
604
gnutls_transport_set_ptr (session, (gnutls_transport_ptr_t) tcp_sd);
669
605
670
606
do{
671
ret = gnutls_handshake(session);
607
ret = gnutls_handshake (session);
672
608
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
673
609
674
if(ret != GNUTLS_E_SUCCESS){
610
if (ret != GNUTLS_E_SUCCESS){
675
611
if(debug){
676
612
fprintf(stderr, "*** GnuTLS Handshake failed ***\n");
677
gnutls_perror(ret);
613
gnutls_perror (ret);
678
614
}
679
615
retval = -1;
680
616
goto mandos_end;
683
619
/* Read OpenPGP packet that contains the wanted password */
684
620
685
621
if(debug){
686
fprintf(stderr, "Retrieving OpenPGP encrypted password from %s\n",
622
fprintf(stderr, "Retrieving pgp encrypted password from %s\n",
687
623
ip);
688
624
}
689
625
690
626
while(true){
691
buffer_capacity = incbuffer(&buffer, buffer_length,
627
buffer_capacity = adjustbuffer(&buffer, buffer_length,
692
628
buffer_capacity);
693
if(buffer_capacity == 0){
694
perror("incbuffer");
629
if (buffer_capacity == 0){
630
perror("adjustbuffer");
695
631
retval = -1;
696
632
goto mandos_end;
697
633
}
698
634
699
sret = gnutls_record_recv(session, buffer+buffer_length,
700
BUFFER_SIZE);
701
if(sret == 0){
635
ret = gnutls_record_recv(session, buffer+buffer_length,
636
BUFFER_SIZE);
637
if (ret == 0){
702
638
break;
703
639
}
704
if(sret < 0){
705
switch(sret){
640
if (ret < 0){
641
switch(ret){
706
642
case GNUTLS_E_INTERRUPTED:
707
643
case GNUTLS_E_AGAIN:
708
644
break;
709
645
case GNUTLS_E_REHANDSHAKE:
710
646
do{
711
ret = gnutls_handshake(session);
647
ret = gnutls_handshake (session);
712
648
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
713
if(ret < 0){
649
if (ret < 0){
714
650
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
715
gnutls_perror(ret);
651
gnutls_perror (ret);
716
652
retval = -1;
717
653
goto mandos_end;
718
654
}
721
657
fprintf(stderr, "Unknown error while reading data from"
722
658
" encrypted session with Mandos server\n");
723
659
retval = -1;
724
gnutls_bye(session, GNUTLS_SHUT_RDWR);
660
gnutls_bye (session, GNUTLS_SHUT_RDWR);
725
661
goto mandos_end;
726
662
}
727
663
} else {
728
buffer_length += (size_t) sret;
664
buffer_length += (size_t) ret;
729
665
}
730
666
}
731
667
733
669
fprintf(stderr, "Closing TLS session\n");
734
670
}
735
671
736
gnutls_bye(session, GNUTLS_SHUT_RDWR);
672
gnutls_bye (session, GNUTLS_SHUT_RDWR);
737
673
738
if(buffer_length > 0){
739
decrypted_buffer_size = pgp_packet_decrypt(buffer,
674
if (buffer_length > 0){
675
decrypted_buffer_size = pgp_packet_decrypt(mc, buffer,
740
676
buffer_length,
741
677
&decrypted_buffer);
742
if(decrypted_buffer_size >= 0){
678
if (decrypted_buffer_size >= 0){
743
679
written = 0;
744
680
while(written < (size_t) decrypted_buffer_size){
745
ret = (int)fwrite(decrypted_buffer + written, 1,
746
(size_t)decrypted_buffer_size - written,
747
stdout);
681
ret = (int)fwrite (decrypted_buffer + written, 1,
682
(size_t)decrypted_buffer_size - written,
683
stdout);
748
684
if(ret == 0 and ferror(stdout)){
749
685
if(debug){
750
686
fprintf(stderr, "Error writing encrypted data: %s\n",
767
703
768
704
mandos_end:
769
705
free(buffer);
770
ret = (int)TEMP_FAILURE_RETRY(close(tcp_sd));
706
ret = TEMP_FAILURE_RETRY(close(tcp_sd));
771
707
if(ret == -1){
772
708
perror("close");
773
709
}
774
gnutls_deinit(session);
710
gnutls_deinit (session);
775
711
return retval;
776
712
}
777
713
778
714
static void resolve_callback(AvahiSServiceResolver *r,
779
715
AvahiIfIndex interface,
780
AvahiProtocol proto,
716
AVAHI_GCC_UNUSED AvahiProtocol protocol,
781
717
AvahiResolverEvent event,
782
718
const char *name,
783
719
const char *type,
788
724
AVAHI_GCC_UNUSED AvahiStringList *txt,
789
725
AVAHI_GCC_UNUSED AvahiLookupResultFlags
790
726
flags,
791
AVAHI_GCC_UNUSED void* userdata){
727
void* userdata) {
728
mandos_context *mc = userdata;
792
729
assert(r);
793
730
794
731
/* Called whenever a service has been resolved successfully or
795
732
timed out */
796
733
797
switch(event){
734
switch (event) {
798
735
default:
799
736
case AVAHI_RESOLVER_FAILURE:
800
737
fprintf(stderr, "(Avahi Resolver) Failed to resolve service '%s'"
801
738
" of type '%s' in domain '%s': %s\n", name, type, domain,
802
avahi_strerror(avahi_server_errno(mc.server)));
739
avahi_strerror(avahi_server_errno(mc->server)));
803
740
break;
804
741
805
742
case AVAHI_RESOLVER_FOUND:
808
745
avahi_address_snprint(ip, sizeof(ip), address);
809
746
if(debug){
810
747
fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %"
811
PRIdMAX ") on port %" PRIu16 "\n", name, host_name,
812
ip, (intmax_t)interface, port);
748
PRIu16 ") on port %d\n", name, host_name, ip,
749
interface, port);
813
750
}
814
int ret = start_mandos_communication(ip, port, interface,
815
avahi_proto_to_af(proto));
816
if(ret == 0){
817
avahi_simple_poll_quit(mc.simple_poll);
751
int ret = start_mandos_communication(ip, port, interface, mc);
752
if (ret == 0){
753
avahi_simple_poll_quit(mc->simple_poll);
818
754
}
819
755
}
820
756
}
821
757
avahi_s_service_resolver_free(r);
822
758
}
823
759
824
static void browse_callback(AvahiSServiceBrowser *b,
825
AvahiIfIndex interface,
826
AvahiProtocol protocol,
827
AvahiBrowserEvent event,
828
const char *name,
829
const char *type,
830
const char *domain,
831
AVAHI_GCC_UNUSED AvahiLookupResultFlags
832
flags,
833
AVAHI_GCC_UNUSED void* userdata){
760
static void browse_callback( AvahiSServiceBrowser *b,
761
AvahiIfIndex interface,
762
AvahiProtocol protocol,
763
AvahiBrowserEvent event,
764
const char *name,
765
const char *type,
766
const char *domain,
767
AVAHI_GCC_UNUSED AvahiLookupResultFlags
768
flags,
769
void* userdata) {
770
mandos_context *mc = userdata;
834
771
assert(b);
835
772
836
773
/* Called whenever a new services becomes available on the LAN or
837
774
is removed from the LAN */
838
775
839
switch(event){
776
switch (event) {
840
777
default:
841
778
case AVAHI_BROWSER_FAILURE:
842
779
843
780
fprintf(stderr, "(Avahi browser) %s\n",
844
avahi_strerror(avahi_server_errno(mc.server)));
845
avahi_simple_poll_quit(mc.simple_poll);
781
avahi_strerror(avahi_server_errno(mc->server)));
782
avahi_simple_poll_quit(mc->simple_poll);
846
783
return;
847
784
848
785
case AVAHI_BROWSER_NEW:
851
788
the callback function is called the Avahi server will free the
852
789
resolver for us. */
853
790
854
if(!(avahi_s_service_resolver_new(mc.server, interface,
791
if (!(avahi_s_service_resolver_new(mc->server, interface,
855
792
protocol, name, type, domain,
856
793
AVAHI_PROTO_INET6, 0,
857
resolve_callback, NULL)))
794
resolve_callback, mc)))
858
795
fprintf(stderr, "Avahi: Failed to resolve service '%s': %s\n",
859
name, avahi_strerror(avahi_server_errno(mc.server)));
796
name, avahi_strerror(avahi_server_errno(mc->server)));
860
797
break;
861
798
862
799
case AVAHI_BROWSER_REMOVE:
871
808
}
872
809
}
873
810
874
static void handle_sigterm(__attribute__((unused)) int sig){
875
int old_errno = errno;
876
avahi_simple_poll_quit(mc.simple_poll);
877
errno = old_errno;
878
}
879
880
811
int main(int argc, char *argv[]){
881
AvahiSServiceBrowser *sb = NULL;
882
int error;
883
int ret;
884
intmax_t tmpmax;
885
int numchars;
886
int exitcode = EXIT_SUCCESS;
887
const char *interface = "eth0";
888
struct ifreq network;
889
int sd;
890
uid_t uid;
891
gid_t gid;
892
char *connect_to = NULL;
893
char tempdir[] = "/tmp/mandosXXXXXX";
894
bool tempdir_created = false;
895
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
896
const char *seckey = PATHDIR "/" SECKEY;
897
const char *pubkey = PATHDIR "/" PUBKEY;
898
899
/* Initialize Mandos context */
900
mc = (mandos_context){ .simple_poll = NULL, .server = NULL,
901
.dh_bits = 1024, .priority = "SECURE256"
902
":!CTYPE-X.509:+CTYPE-OPENPGP" };
903
bool gnutls_initialized = false;
904
bool gpgme_initialized = false;
905
double delay = 2.5;
906
907
struct sigaction old_sigterm_action;
908
struct sigaction sigterm_action = { .sa_handler = handle_sigterm };
909
910
{
911
struct argp_option options[] = {
912
{ .name = "debug", .key = 128,
913
.doc = "Debug mode", .group = 3 },
914
{ .name = "connect", .key = 'c',
915
.arg = "ADDRESS:PORT",
916
.doc = "Connect directly to a specific Mandos server",
917
.group = 1 },
918
{ .name = "interface", .key = 'i',
919
.arg = "NAME",
920
.doc = "Network interface that will be used to search for"
921
" Mandos servers",
922
.group = 1 },
923
{ .name = "seckey", .key = 's',
924
.arg = "FILE",
925
.doc = "OpenPGP secret key file base name",
926
.group = 1 },
927
{ .name = "pubkey", .key = 'p',
928
.arg = "FILE",
929
.doc = "OpenPGP public key file base name",
930
.group = 2 },
931
{ .name = "dh-bits", .key = 129,
932
.arg = "BITS",
933
.doc = "Bit length of the prime number used in the"
934
" Diffie-Hellman key exchange",
935
.group = 2 },
936
{ .name = "priority", .key = 130,
937
.arg = "STRING",
938
.doc = "GnuTLS priority string for the TLS handshake",
939
.group = 1 },
940
{ .name = "delay", .key = 131,
941
.arg = "SECONDS",
942
.doc = "Maximum delay to wait for interface startup",
943
.group = 2 },
944
{ .name = NULL }
945
};
946
947
error_t parse_opt(int key, char *arg,
948
struct argp_state *state){
949
switch(key){
950
case 128: /* --debug */
951
debug = true;
952
break;
953
case 'c': /* --connect */
954
connect_to = arg;
955
break;
956
case 'i': /* --interface */
957
interface = arg;
958
break;
959
case 's': /* --seckey */
960
seckey = arg;
961
break;
962
case 'p': /* --pubkey */
963
pubkey = arg;
964
break;
965
case 129: /* --dh-bits */
966
ret = sscanf(arg, "%" SCNdMAX "%n", &tmpmax, &numchars);
967
if(ret < 1 or tmpmax != (typeof(mc.dh_bits))tmpmax
968
or arg[numchars] != '\0'){
969
fprintf(stderr, "Bad number of DH bits\n");
970
exit(EXIT_FAILURE);
971
}
972
mc.dh_bits = (typeof(mc.dh_bits))tmpmax;
973
break;
974
case 130: /* --priority */
975
mc.priority = arg;
976
break;
977
case 131: /* --delay */
978
ret = sscanf(arg, "%lf%n", &delay, &numchars);
979
if(ret < 1 or arg[numchars] != '\0'){
980
fprintf(stderr, "Bad delay\n");
981
exit(EXIT_FAILURE);
982
}
983
break;
984
case ARGP_KEY_ARG:
985
argp_usage(state);
986
case ARGP_KEY_END:
987
break;
988
default:
989
return ARGP_ERR_UNKNOWN;
990
}
991
return 0;
992
}
993
994
struct argp argp = { .options = options, .parser = parse_opt,
995
.args_doc = "",
996
.doc = "Mandos client -- Get and decrypt"
997
" passwords from a Mandos server" };
998
ret = argp_parse(&argp, argc, argv, 0, 0, NULL);
999
if(ret == ARGP_ERR_UNKNOWN){
1000
fprintf(stderr, "Unknown error while parsing arguments\n");
1001
exitcode = EXIT_FAILURE;
1002
goto end;
1003
}
1004
}
1005
1006
/* If the interface is down, bring it up */
1007
if(interface[0] != '\0'){
1008
#ifdef __linux__
1009
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1010
messages to mess up the prompt */
1011
ret = klogctl(8, NULL, 5);
1012
bool restore_loglevel = true;
1013
if(ret == -1){
1014
restore_loglevel = false;
1015
perror("klogctl");
1016
}
1017
#endif
1018
1019
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1020
if(sd < 0){
1021
perror("socket");
1022
exitcode = EXIT_FAILURE;
1023
#ifdef __linux__
1024
if(restore_loglevel){
1025
ret = klogctl(7, NULL, 0);
1026
if(ret == -1){
1027
perror("klogctl");
1028
}
1029
}
1030
#endif
1031
goto end;
1032
}
1033
strcpy(network.ifr_name, interface);
1034
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1035
if(ret == -1){
1036
perror("ioctl SIOCGIFFLAGS");
1037
#ifdef __linux__
1038
if(restore_loglevel){
1039
ret = klogctl(7, NULL, 0);
1040
if(ret == -1){
1041
perror("klogctl");
1042
}
1043
}
1044
#endif
1045
exitcode = EXIT_FAILURE;
1046
goto end;
1047
}
1048
if((network.ifr_flags & IFF_UP) == 0){
1049
network.ifr_flags |= IFF_UP;
1050
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1051
if(ret == -1){
1052
perror("ioctl SIOCSIFFLAGS");
1053
exitcode = EXIT_FAILURE;
1054
#ifdef __linux__
1055
if(restore_loglevel){
1056
ret = klogctl(7, NULL, 0);
1057
if(ret == -1){
1058
perror("klogctl");
812
AvahiSServiceBrowser *sb = NULL;
813
int error;
814
int ret;
815
int exitcode = EXIT_SUCCESS;
816
const char *interface = "eth0";
817
struct ifreq network;
818
int sd;
819
uid_t uid;
820
gid_t gid;
821
char *connect_to = NULL;
822
char tempdir[] = "/tmp/mandosXXXXXX";
823
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
824
const char *seckey = PATHDIR "/" SECKEY;
825
const char *pubkey = PATHDIR "/" PUBKEY;
826
827
mandos_context mc = { .simple_poll = NULL, .server = NULL,
828
.dh_bits = 1024, .priority = "SECURE256"
829
":!CTYPE-X.509:+CTYPE-OPENPGP" };
830
bool gnutls_initalized = false;
831
bool gpgme_initalized = false;
832
833
{
834
struct argp_option options[] = {
835
{ .name = "debug", .key = 128,
836
.doc = "Debug mode", .group = 3 },
837
{ .name = "connect", .key = 'c',
838
.arg = "ADDRESS:PORT",
839
.doc = "Connect directly to a specific Mandos server",
840
.group = 1 },
841
{ .name = "interface", .key = 'i',
842
.arg = "NAME",
843
.doc = "Interface that will be used to search for Mandos"
844
" servers",
845
.group = 1 },
846
{ .name = "seckey", .key = 's',
847
.arg = "FILE",
848
.doc = "OpenPGP secret key file base name",
849
.group = 1 },
850
{ .name = "pubkey", .key = 'p',
851
.arg = "FILE",
852
.doc = "OpenPGP public key file base name",
853
.group = 2 },
854
{ .name = "dh-bits", .key = 129,
855
.arg = "BITS",
856
.doc = "Bit length of the prime number used in the"
857
" Diffie-Hellman key exchange",
858
.group = 2 },
859
{ .name = "priority", .key = 130,
860
.arg = "STRING",
861
.doc = "GnuTLS priority string for the TLS handshake",
862
.group = 1 },
863
{ .name = NULL }
864
};
865
866
error_t parse_opt (int key, char *arg,
867
struct argp_state *state) {
868
/* Get the INPUT argument from `argp_parse', which we know is
869
a pointer to our plugin list pointer. */
870
switch (key) {
871
case 128: /* --debug */
872
debug = true;
873
break;
874
case 'c': /* --connect */
875
connect_to = arg;
876
break;
877
case 'i': /* --interface */
878
interface = arg;
879
break;
880
case 's': /* --seckey */
881
seckey = arg;
882
break;
883
case 'p': /* --pubkey */
884
pubkey = arg;
885
break;
886
case 129: /* --dh-bits */
887
errno = 0;
888
mc.dh_bits = (unsigned int) strtol(arg, NULL, 10);
889
if (errno){
890
perror("strtol");
891
exit(EXIT_FAILURE);
1059
892
}
893
break;
894
case 130: /* --priority */
895
mc.priority = arg;
896
break;
897
case ARGP_KEY_ARG:
898
argp_usage (state);
899
case ARGP_KEY_END:
900
break;
901
default:
902
return ARGP_ERR_UNKNOWN;
1060
903
}
1061
#endif
904
return 0;
905
}
906
907
struct argp argp = { .options = options, .parser = parse_opt,
908
.args_doc = "",
909
.doc = "Mandos client -- Get and decrypt"
910
" passwords from a Mandos server" };
911
ret = argp_parse (&argp, argc, argv, 0, 0, NULL);
912
if (ret == ARGP_ERR_UNKNOWN){
913
fprintf(stderr, "Unknown error while parsing arguments\n");
914
exitcode = EXIT_FAILURE;
1062
915
goto end;
1063
916
}
1064
917
}
1065
/* sleep checking until interface is running */
1066
for(int i=0; i < delay * 4; i++){
918
919
/* If the interface is down, bring it up */
920
{
921
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
922
if(sd < 0) {
923
perror("socket");
924
exitcode = EXIT_FAILURE;
925
goto end;
926
}
927
strcpy(network.ifr_name, interface);
1067
928
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1068
929
if(ret == -1){
1069
930
perror("ioctl SIOCGIFFLAGS");
1070
} else if(network.ifr_flags & IFF_RUNNING){
1071
break;
1072
}
1073
struct timespec sleeptime = { .tv_nsec = 250000000 };
1074
ret = nanosleep(&sleeptime, NULL);
1075
if(ret == -1 and errno != EINTR){
1076
perror("nanosleep");
1077
}
1078
}
1079
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1080
if(ret == -1){
1081
perror("close");
1082
}
1083
#ifdef __linux__
1084
if(restore_loglevel){
1085
/* Restores kernel loglevel to default */
1086
ret = klogctl(7, NULL, 0);
931
exitcode = EXIT_FAILURE;
932
goto end;
933
}
934
if((network.ifr_flags & IFF_UP) == 0){
935
network.ifr_flags |= IFF_UP;
936
ret = ioctl(sd, SIOCSIFFLAGS, &network);
937
if(ret == -1){
938
perror("ioctl SIOCSIFFLAGS");
939
exitcode = EXIT_FAILURE;
940
goto end;
941
}
942
}
943
ret = TEMP_FAILURE_RETRY(close(sd));
1087
944
if(ret == -1){
1088
perror("klogctl");
945
perror("close");
1089
946
}
1090
947
}
1091
#endif
1092
}
1093
1094
uid = getuid();
1095
gid = getgid();
1096
1097
errno = 0;
1098
setgid(gid);
1099
if(ret == -1){
1100
perror("setgid");
1101
}
1102
1103
ret = setuid(uid);
1104
if(ret == -1){
1105
perror("setuid");
1106
}
1107
1108
ret = init_gnutls_global(pubkey, seckey);
1109
if(ret == -1){
1110
fprintf(stderr, "init_gnutls_global failed\n");
1111
exitcode = EXIT_FAILURE;
1112
goto end;
1113
} else {
1114
gnutls_initialized = true;
1115
}
1116
1117
if(mkdtemp(tempdir) == NULL){
1118
perror("mkdtemp");
1119
goto end;
1120
}
1121
tempdir_created = true;
1122
1123
if(not init_gpgme(pubkey, seckey, tempdir)){
1124
fprintf(stderr, "init_gpgme failed\n");
1125
exitcode = EXIT_FAILURE;
1126
goto end;
1127
} else {
1128
gpgme_initialized = true;
1129
}
1130
1131
if(interface[0] != '\0'){
948
949
uid = getuid();
950
gid = getgid();
951
952
ret = setuid(uid);
953
if (ret == -1){
954
perror("setuid");
955
}
956
957
setgid(gid);
958
if (ret == -1){
959
perror("setgid");
960
}
961
962
ret = init_gnutls_global(&mc, pubkey, seckey);
963
if (ret == -1){
964
fprintf(stderr, "init_gnutls_global failed\n");
965
exitcode = EXIT_FAILURE;
966
goto end;
967
} else {
968
gnutls_initalized = true;
969
}
970
971
if(mkdtemp(tempdir) == NULL){
972
perror("mkdtemp");
973
tempdir[0] = '\0';
974
goto end;
975
}
976
977
if(not init_gpgme(&mc, pubkey, seckey, tempdir)){
978
fprintf(stderr, "gpgme_initalized failed\n");
979
exitcode = EXIT_FAILURE;
980
goto end;
981
} else {
982
gpgme_initalized = true;
983
}
984
1132
985
if_index = (AvahiIfIndex) if_nametoindex(interface);
1133
986
if(if_index == 0){
1134
987
fprintf(stderr, "No such interface: \"%s\"\n", interface);
1135
exitcode = EXIT_FAILURE;
1136
goto end;
1137
}
1138
}
1139
1140
if(connect_to != NULL){
1141
/* Connect directly, do not use Zeroconf */
1142
/* (Mainly meant for debugging) */
1143
char *address = strrchr(connect_to, ':');
1144
if(address == NULL){
1145
fprintf(stderr, "No colon in address\n");
1146
exitcode = EXIT_FAILURE;
1147
goto end;
1148
}
1149
uint16_t port;
1150
ret = sscanf(address+1, "%" SCNdMAX "%n", &tmpmax, &numchars);
1151
if(ret < 1 or tmpmax != (uint16_t)tmpmax
1152
or address[numchars+1] != '\0'){
1153
fprintf(stderr, "Bad port number\n");
1154
exitcode = EXIT_FAILURE;
1155
goto end;
1156
}
1157
port = (uint16_t)tmpmax;
1158
*address = '\0';
1159
address = connect_to;
1160
/* Colon in address indicates IPv6 */
1161
int af;
1162
if(strchr(address, ':') != NULL){
1163
af = AF_INET6;
1164
} else {
1165
af = AF_INET;
1166
}
1167
ret = start_mandos_communication(address, port, if_index, af);
1168
if(ret < 0){
1169
exitcode = EXIT_FAILURE;
1170
} else {
1171
exitcode = EXIT_SUCCESS;
1172
}
1173
goto end;
1174
}
1175
1176
if(not debug){
1177
avahi_set_log_function(empty_log);
1178
}
1179
1180
/* Initialize the pseudo-RNG for Avahi */
1181
srand((unsigned int) time(NULL));
1182
1183
/* Allocate main Avahi loop object */
1184
mc.simple_poll = avahi_simple_poll_new();
1185
if(mc.simple_poll == NULL){
1186
fprintf(stderr, "Avahi: Failed to create simple poll object.\n");
1187
exitcode = EXIT_FAILURE;
1188
goto end;
1189
}
1190
1191
{
1192
AvahiServerConfig config;
1193
/* Do not publish any local Zeroconf records */
1194
avahi_server_config_init(&config);
1195
config.publish_hinfo = 0;
1196
config.publish_addresses = 0;
1197
config.publish_workstation = 0;
1198
config.publish_domain = 0;
1199
1200
/* Allocate a new server */
1201
mc.server = avahi_server_new(avahi_simple_poll_get
1202
(mc.simple_poll), &config, NULL,
1203
NULL, &error);
1204
1205
/* Free the Avahi configuration data */
1206
avahi_server_config_free(&config);
1207
}
1208
1209
/* Check if creating the Avahi server object succeeded */
1210
if(mc.server == NULL){
1211
fprintf(stderr, "Failed to create Avahi server: %s\n",
1212
avahi_strerror(error));
1213
exitcode = EXIT_FAILURE;
1214
goto end;
1215
}
1216
1217
/* Create the Avahi service browser */
1218
sb = avahi_s_service_browser_new(mc.server, if_index,
1219
AVAHI_PROTO_INET6, "_mandos._tcp",
1220
NULL, 0, browse_callback, NULL);
1221
if(sb == NULL){
1222
fprintf(stderr, "Failed to create service browser: %s\n",
1223
avahi_strerror(avahi_server_errno(mc.server)));
1224
exitcode = EXIT_FAILURE;
1225
goto end;
1226
}
1227
1228
sigemptyset(&sigterm_action.sa_mask);
1229
ret = sigaddset(&sigterm_action.sa_mask, SIGTERM);
1230
if(ret == -1){
1231
perror("sigaddset");
1232
exitcode = EXIT_FAILURE;
1233
goto end;
1234
}
1235
ret = sigaction(SIGTERM, &sigterm_action, &old_sigterm_action);
1236
if(ret == -1){
1237
perror("sigaction");
1238
exitcode = EXIT_FAILURE;
1239
goto end;
1240
}
1241
1242
/* Run the main loop */
1243
1244
if(debug){
1245
fprintf(stderr, "Starting Avahi loop search\n");
1246
}
1247
1248
avahi_simple_poll_loop(mc.simple_poll);
1249
988
exit(EXIT_FAILURE);
989
}
990
991
if(connect_to != NULL){
992
/* Connect directly, do not use Zeroconf */
993
/* (Mainly meant for debugging) */
994
char *address = strrchr(connect_to, ':');
995
if(address == NULL){
996
fprintf(stderr, "No colon in address\n");
997
exitcode = EXIT_FAILURE;
998
goto end;
999
}
1000
errno = 0;
1001
uint16_t port = (uint16_t) strtol(address+1, NULL, 10);
1002
if(errno){
1003
perror("Bad port number");
1004
exitcode = EXIT_FAILURE;
1005
goto end;
1006
}
1007
*address = '\0';
1008
address = connect_to;
1009
ret = start_mandos_communication(address, port, if_index, &mc);
1010
if(ret < 0){
1011
exitcode = EXIT_FAILURE;
1012
} else {
1013
exitcode = EXIT_SUCCESS;
1014
}
1015
goto end;
1016
}
1017
1018
if (not debug){
1019
avahi_set_log_function(empty_log);
1020
}
1021
1022
/* Initialize the pseudo-RNG for Avahi */
1023
srand((unsigned int) time(NULL));
1024
1025
/* Allocate main Avahi loop object */
1026
mc.simple_poll = avahi_simple_poll_new();
1027
if (mc.simple_poll == NULL) {
1028
fprintf(stderr, "Avahi: Failed to create simple poll"
1029
" object.\n");
1030
exitcode = EXIT_FAILURE;
1031
goto end;
1032
}
1033
1034
{
1035
AvahiServerConfig config;
1036
/* Do not publish any local Zeroconf records */
1037
avahi_server_config_init(&config);
1038
config.publish_hinfo = 0;
1039
config.publish_addresses = 0;
1040
config.publish_workstation = 0;
1041
config.publish_domain = 0;
1042
1043
/* Allocate a new server */
1044
mc.server = avahi_server_new(avahi_simple_poll_get
1045
(mc.simple_poll), &config, NULL,
1046
NULL, &error);
1047
1048
/* Free the Avahi configuration data */
1049
avahi_server_config_free(&config);
1050
}
1051
1052
/* Check if creating the Avahi server object succeeded */
1053
if (mc.server == NULL) {
1054
fprintf(stderr, "Failed to create Avahi server: %s\n",
1055
avahi_strerror(error));
1056
exitcode = EXIT_FAILURE;
1057
goto end;
1058
}
1059
1060
/* Create the Avahi service browser */
1061
sb = avahi_s_service_browser_new(mc.server, if_index,
1062
AVAHI_PROTO_INET6,
1063
"_mandos._tcp", NULL, 0,
1064
browse_callback, &mc);
1065
if (sb == NULL) {
1066
fprintf(stderr, "Failed to create service browser: %s\n",
1067
avahi_strerror(avahi_server_errno(mc.server)));
1068
exitcode = EXIT_FAILURE;
1069
goto end;
1070
}
1071
1072
/* Run the main loop */
1073
1074
if (debug){
1075
fprintf(stderr, "Starting Avahi loop search\n");
1076
}
1077
1078
avahi_simple_poll_loop(mc.simple_poll);
1079
1250
1080
end:
1251
1252
if(debug){
1253
fprintf(stderr, "%s exiting\n", argv[0]);
1254
}
1255
1256
/* Cleanup things */
1257
if(sb != NULL)
1258
avahi_s_service_browser_free(sb);
1259
1260
if(mc.server != NULL)
1261
avahi_server_free(mc.server);
1262
1263
if(mc.simple_poll != NULL)
1264
avahi_simple_poll_free(mc.simple_poll);
1265
1266
if(gnutls_initialized){
1267
gnutls_certificate_free_credentials(mc.cred);
1268
gnutls_global_deinit();
1269
gnutls_dh_params_deinit(mc.dh_params);
1270
}
1271
1272
if(gpgme_initialized){
1273
gpgme_release(mc.ctx);
1274
}
1275
1276
/* Removes the temp directory used by GPGME */
1277
if(tempdir_created){
1278
DIR *d;
1279
struct dirent *direntry;
1280
d = opendir(tempdir);
1281
if(d == NULL){
1282
if(errno != ENOENT){
1081
1082
if (debug){
1083
fprintf(stderr, "%s exiting\n", argv[0]);
1084
}
1085
1086
/* Cleanup things */
1087
if (sb != NULL)
1088
avahi_s_service_browser_free(sb);
1089
1090
if (mc.server != NULL)
1091
avahi_server_free(mc.server);
1092
1093
if (mc.simple_poll != NULL)
1094
avahi_simple_poll_free(mc.simple_poll);
1095
1096
if (gnutls_initalized){
1097
gnutls_certificate_free_credentials(mc.cred);
1098
gnutls_global_deinit ();
1099
gnutls_dh_params_deinit(mc.dh_params);
1100
}
1101
1102
if(gpgme_initalized){
1103
gpgme_release(mc.ctx);
1104
}
1105
1106
/* Removes the temp directory used by GPGME */
1107
if(tempdir[0] != '\0'){
1108
DIR *d;
1109
struct dirent *direntry;
1110
d = opendir(tempdir);
1111
if(d == NULL){
1283
1112
perror("opendir");
1284
}
1285
} else {
1286
while(true){
1287
direntry = readdir(d);
1288
if(direntry == NULL){
1289
break;
1290
}
1291
/* Skip "." and ".." */
1292
if(direntry->d_name[0] == '.'
1293
and (direntry->d_name[1] == '\0'
1294
or (direntry->d_name[1] == '.'
1295
and direntry->d_name[2] == '\0'))){
1296
continue;
1297
}
1298
char *fullname = NULL;
1299
ret = asprintf(&fullname, "%s/%s", tempdir,
1300
direntry->d_name);
1301
if(ret < 0){
1302
perror("asprintf");
1303
continue;
1304
}
1305
ret = remove(fullname);
1306
if(ret == -1){
1307
fprintf(stderr, "remove(\"%s\"): %s\n", fullname,
1308
strerror(errno));
1309
}
1310
free(fullname);
1311
}
1312
closedir(d);
1313
}
1314
ret = rmdir(tempdir);
1315
if(ret == -1 and errno != ENOENT){
1316
perror("rmdir");
1317
}
1318
}
1319
1320
return exitcode;
1113
} else {
1114
while(true){
1115
direntry = readdir(d);
1116
if(direntry == NULL){
1117
break;
1118
}
1119
if (direntry->d_type == DT_REG){
1120
char *fullname = NULL;
1121
ret = asprintf(&fullname, "%s/%s", tempdir,
1122
direntry->d_name);
1123
if(ret < 0){
1124
perror("asprintf");
1125
continue;
1126
}
1127
ret = unlink(fullname);
1128
if(ret == -1){
1129
fprintf(stderr, "unlink(\"%s\"): %s",
1130
fullname, strerror(errno));
1131
}
1132
free(fullname);
1133
}
1134
}
1135
closedir(d);
1136
}
1137
ret = rmdir(tempdir);
1138
if(ret == -1){
1139
perror("rmdir");
1140
}
1141
}
1142
1143
return exitcode;
1321
1144
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0