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- Committer: Teddy Hogeborn
- Date: 2009-02-09 19:26:19 UTC
- Revision ID: teddy@fukt.bsnet.se-20090209192619-7rse82x9pypq4ihk
* plugin-runner.c: Comment change.
* plugins.d/mandos-client.c: Comment changes.
(quit_now): New global flag.
(handle_sigterm): Only call avahi_simple_poll_quit once.
(main): Also handle SIGINT and SIGHUP.
* plugins.d/mandos-client.c: Comment changes.
(quit_now): New global flag.
(handle_sigterm): Only call avahi_simple_poll_quit once.
(main): Also handle SIGINT and SIGHUP.
- files added:
- debian/watch
- files removed:
- debian/mandos-client.config
- 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
9
9
* "browse_callback", and parts of "main".
10
10
*
11
11
* Everything else is
12
* Copyright © 2008 Teddy Hogeborn
13
* Copyright © 2008 Björn Påhlsson
12
* Copyright © 2008,2009 Teddy Hogeborn
13
* Copyright © 2008,2009 Björn Påhlsson
14
14
*
15
15
* This program is free software: you can redistribute it and/or
16
16
* modify it under the terms of the GNU General Public License as
36
36
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), asprintf() */
37
37
38
38
#include <stdio.h> /* fprintf(), stderr, fwrite(),
39
stdout, ferror() */
39
stdout, ferror(), sscanf(),
40
remove() */
40
41
#include <stdint.h> /* uint16_t, uint32_t */
41
42
#include <stddef.h> /* NULL, size_t, ssize_t */
42
43
#include <stdlib.h> /* free(), EXIT_SUCCESS, EXIT_FAILURE,
43
44
srand() */
44
#include <stdbool.h> /* bool, true */
45
#include <stdbool.h> /* bool, false, true */
45
46
#include <string.h> /* memset(), strcmp(), strlen(),
46
47
strerror(), asprintf(), strcpy() */
47
#include <sys/ioctl.h> /* ioctl */
48
#include <sys/ioctl.h> /* ioctl */
48
49
#include <sys/types.h> /* socket(), inet_pton(), sockaddr,
49
50
sockaddr_in6, PF_INET6,
50
SOCK_STREAM, INET6_ADDRSTRLEN,
51
uid_t, gid_t, open(), opendir(), DIR */
51
SOCK_STREAM, uid_t, gid_t, open(),
52
opendir(), DIR */
52
53
#include <sys/stat.h> /* open() */
53
54
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
54
struct in6_addr, inet_pton(),
55
connect() */
55
inet_pton(), connect() */
56
56
#include <fcntl.h> /* open() */
57
#include <dirent.h> /* opendir(), struct dirent, readdir() */
58
#include <inttypes.h> /* PRIu16 */
57
#include <dirent.h> /* opendir(), struct dirent, readdir()
58
*/
59
#include <inttypes.h> /* PRIu16, intmax_t, SCNdMAX */
59
60
#include <assert.h> /* assert() */
60
61
#include <errno.h> /* perror(), errno */
61
#include <time.h> /* time() */
62
#include <time.h> /* nanosleep(), time() */
62
63
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
63
64
SIOCSIFFLAGS, if_indextoname(),
64
65
if_nametoindex(), IF_NAMESIZE */
65
#include <netinet/in.h>
66
#include <netinet/in.h> /* IN6_IS_ADDR_LINKLOCAL,
67
INET_ADDRSTRLEN, INET6_ADDRSTRLEN
68
*/
66
69
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
67
70
getuid(), getgid(), setuid(),
68
71
setgid() */
69
72
#include <arpa/inet.h> /* inet_pton(), htons */
70
#include <iso646.h> /* not, and */
73
#include <iso646.h> /* not, or, and */
71
74
#include <argp.h> /* struct argp_option, error_t, struct
72
75
argp_state, struct argp,
73
76
argp_parse(), ARGP_KEY_ARG,
74
77
ARGP_KEY_END, ARGP_ERR_UNKNOWN */
78
#include <signal.h> /* sigemptyset(), sigaddset(),
79
sigaction(), SIGTERM, sigaction,
80
sig_atomic_t */
81
82
#ifdef __linux__
83
#include <sys/klog.h> /* klogctl() */
84
#endif /* __linux__ */
75
85
76
86
/* Avahi */
77
87
/* All Avahi types, constants and functions
90
100
gnutls_*
91
101
init_gnutls_session(),
92
102
GNUTLS_* */
93
#include <gnutls/openpgp.h> /* gnutls_certificate_set_openpgp_key_file(),
103
#include <gnutls/openpgp.h>
104
/* gnutls_certificate_set_openpgp_key_file(),
94
105
GNUTLS_OPENPGP_FMT_BASE64 */
95
106
96
107
/* GPGME */
122
133
gpgme_ctx_t ctx;
123
134
} mandos_context;
124
135
136
/* global context so signal handler can reach it*/
137
mandos_context mc;
138
125
139
/*
126
* Make room in "buffer" for at least BUFFER_SIZE additional bytes.
127
* "buffer_capacity" is how much is currently allocated,
140
* Make additional room in "buffer" for at least BUFFER_SIZE more
141
* bytes. "buffer_capacity" is how much is currently allocated,
128
142
* "buffer_length" is how much is already used.
129
143
*/
130
size_t adjustbuffer(char **buffer, size_t buffer_length,
144
size_t incbuffer(char **buffer, size_t buffer_length,
131
145
size_t buffer_capacity){
132
if (buffer_length + BUFFER_SIZE > buffer_capacity){
146
if(buffer_length + BUFFER_SIZE > buffer_capacity){
133
147
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
134
if (buffer == NULL){
148
if(buffer == NULL){
135
149
return 0;
136
150
}
137
151
buffer_capacity += BUFFER_SIZE;
142
156
/*
143
157
* Initialize GPGME.
144
158
*/
145
static bool init_gpgme(mandos_context *mc, const char *seckey,
159
static bool init_gpgme(const char *seckey,
146
160
const char *pubkey, const char *tempdir){
147
161
int ret;
148
162
gpgme_error_t rc;
150
164
151
165
152
166
/*
153
* Helper function to insert pub and seckey to the enigne keyring.
167
* Helper function to insert pub and seckey to the engine keyring.
154
168
*/
155
169
bool import_key(const char *filename){
156
170
int fd;
157
171
gpgme_data_t pgp_data;
158
172
159
fd = TEMP_FAILURE_RETRY(open(filename, O_RDONLY));
173
fd = (int)TEMP_FAILURE_RETRY(open(filename, O_RDONLY));
160
174
if(fd == -1){
161
175
perror("open");
162
176
return false;
163
177
}
164
178
165
179
rc = gpgme_data_new_from_fd(&pgp_data, fd);
166
if (rc != GPG_ERR_NO_ERROR){
180
if(rc != GPG_ERR_NO_ERROR){
167
181
fprintf(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
168
182
gpgme_strsource(rc), gpgme_strerror(rc));
169
183
return false;
170
184
}
171
185
172
rc = gpgme_op_import(mc->ctx, pgp_data);
173
if (rc != GPG_ERR_NO_ERROR){
186
rc = gpgme_op_import(mc.ctx, pgp_data);
187
if(rc != GPG_ERR_NO_ERROR){
174
188
fprintf(stderr, "bad gpgme_op_import: %s: %s\n",
175
189
gpgme_strsource(rc), gpgme_strerror(rc));
176
190
return false;
177
191
}
178
192
179
ret = TEMP_FAILURE_RETRY(close(fd));
193
ret = (int)TEMP_FAILURE_RETRY(close(fd));
180
194
if(ret == -1){
181
195
perror("close");
182
196
}
184
198
return true;
185
199
}
186
200
187
if (debug){
188
fprintf(stderr, "Initialize gpgme\n");
201
if(debug){
202
fprintf(stderr, "Initializing GPGME\n");
189
203
}
190
204
191
205
/* Init GPGME */
192
206
gpgme_check_version(NULL);
193
207
rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
194
if (rc != GPG_ERR_NO_ERROR){
208
if(rc != GPG_ERR_NO_ERROR){
195
209
fprintf(stderr, "bad gpgme_engine_check_version: %s: %s\n",
196
210
gpgme_strsource(rc), gpgme_strerror(rc));
197
211
return false;
198
212
}
199
213
200
214
/* Set GPGME home directory for the OpenPGP engine only */
201
rc = gpgme_get_engine_info (&engine_info);
202
if (rc != GPG_ERR_NO_ERROR){
215
rc = gpgme_get_engine_info(&engine_info);
216
if(rc != GPG_ERR_NO_ERROR){
203
217
fprintf(stderr, "bad gpgme_get_engine_info: %s: %s\n",
204
218
gpgme_strsource(rc), gpgme_strerror(rc));
205
219
return false;
218
232
}
219
233
220
234
/* Create new GPGME "context" */
221
rc = gpgme_new(&(mc->ctx));
222
if (rc != GPG_ERR_NO_ERROR){
235
rc = gpgme_new(&(mc.ctx));
236
if(rc != GPG_ERR_NO_ERROR){
223
237
fprintf(stderr, "bad gpgme_new: %s: %s\n",
224
238
gpgme_strsource(rc), gpgme_strerror(rc));
225
239
return false;
226
240
}
227
241
228
if (not import_key(pubkey) or not import_key(seckey)){
242
if(not import_key(pubkey) or not import_key(seckey)){
229
243
return false;
230
244
}
231
245
236
250
* Decrypt OpenPGP data.
237
251
* Returns -1 on error
238
252
*/
239
static ssize_t pgp_packet_decrypt (const mandos_context *mc,
240
const char *cryptotext,
241
size_t crypto_size,
242
char **plaintext){
253
static ssize_t pgp_packet_decrypt(const char *cryptotext,
254
size_t crypto_size,
255
char **plaintext){
243
256
gpgme_data_t dh_crypto, dh_plain;
244
257
gpgme_error_t rc;
245
258
ssize_t ret;
246
259
size_t plaintext_capacity = 0;
247
260
ssize_t plaintext_length = 0;
248
261
249
if (debug){
262
if(debug){
250
263
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
251
264
}
252
265
253
266
/* Create new GPGME data buffer from memory cryptotext */
254
267
rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,
255
268
0);
256
if (rc != GPG_ERR_NO_ERROR){
269
if(rc != GPG_ERR_NO_ERROR){
257
270
fprintf(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
258
271
gpgme_strsource(rc), gpgme_strerror(rc));
259
272
return -1;
261
274
262
275
/* Create new empty GPGME data buffer for the plaintext */
263
276
rc = gpgme_data_new(&dh_plain);
264
if (rc != GPG_ERR_NO_ERROR){
277
if(rc != GPG_ERR_NO_ERROR){
265
278
fprintf(stderr, "bad gpgme_data_new: %s: %s\n",
266
279
gpgme_strsource(rc), gpgme_strerror(rc));
267
280
gpgme_data_release(dh_crypto);
270
283
271
284
/* Decrypt data from the cryptotext data buffer to the plaintext
272
285
data buffer */
273
rc = gpgme_op_decrypt(mc->ctx, dh_crypto, dh_plain);
274
if (rc != GPG_ERR_NO_ERROR){
286
rc = gpgme_op_decrypt(mc.ctx, dh_crypto, dh_plain);
287
if(rc != GPG_ERR_NO_ERROR){
275
288
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
276
289
gpgme_strsource(rc), gpgme_strerror(rc));
277
290
plaintext_length = -1;
278
if (debug){
291
if(debug){
279
292
gpgme_decrypt_result_t result;
280
result = gpgme_op_decrypt_result(mc->ctx);
281
if (result == NULL){
293
result = gpgme_op_decrypt_result(mc.ctx);
294
if(result == NULL){
282
295
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
283
296
} else {
284
297
fprintf(stderr, "Unsupported algorithm: %s\n",
311
324
}
312
325
313
326
/* Seek back to the beginning of the GPGME plaintext data buffer */
314
if (gpgme_data_seek(dh_plain, (off_t) 0, SEEK_SET) == -1){
327
if(gpgme_data_seek(dh_plain, (off_t)0, SEEK_SET) == -1){
315
328
perror("gpgme_data_seek");
316
329
plaintext_length = -1;
317
330
goto decrypt_end;
319
332
320
333
*plaintext = NULL;
321
334
while(true){
322
plaintext_capacity = adjustbuffer(plaintext,
335
plaintext_capacity = incbuffer(plaintext,
323
336
(size_t)plaintext_length,
324
337
plaintext_capacity);
325
if (plaintext_capacity == 0){
326
perror("adjustbuffer");
338
if(plaintext_capacity == 0){
339
perror("incbuffer");
327
340
plaintext_length = -1;
328
341
goto decrypt_end;
329
342
}
331
344
ret = gpgme_data_read(dh_plain, *plaintext + plaintext_length,
332
345
BUFFER_SIZE);
333
346
/* Print the data, if any */
334
if (ret == 0){
347
if(ret == 0){
335
348
/* EOF */
336
349
break;
337
350
}
361
374
return plaintext_length;
362
375
}
363
376
364
static const char * safer_gnutls_strerror (int value) {
365
const char *ret = gnutls_strerror (value); /* Spurious warning */
366
if (ret == NULL)
377
static const char * safer_gnutls_strerror(int value){
378
const char *ret = gnutls_strerror(value); /* Spurious warning from
379
-Wunreachable-code */
380
if(ret == NULL)
367
381
ret = "(unknown)";
368
382
return ret;
369
383
}
374
388
fprintf(stderr, "GnuTLS: %s", string);
375
389
}
376
390
377
static int init_gnutls_global(mandos_context *mc,
378
const char *pubkeyfilename,
391
static int init_gnutls_global(const char *pubkeyfilename,
379
392
const char *seckeyfilename){
380
393
int ret;
381
394
384
397
}
385
398
386
399
ret = gnutls_global_init();
387
if (ret != GNUTLS_E_SUCCESS) {
388
fprintf (stderr, "GnuTLS global_init: %s\n",
389
safer_gnutls_strerror(ret));
400
if(ret != GNUTLS_E_SUCCESS){
401
fprintf(stderr, "GnuTLS global_init: %s\n",
402
safer_gnutls_strerror(ret));
390
403
return -1;
391
404
}
392
405
393
if (debug){
406
if(debug){
394
407
/* "Use a log level over 10 to enable all debugging options."
395
408
* - GnuTLS manual
396
409
*/
399
412
}
400
413
401
414
/* OpenPGP credentials */
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 ();
415
gnutls_certificate_allocate_credentials(&mc.cred);
416
if(ret != GNUTLS_E_SUCCESS){
417
fprintf(stderr, "GnuTLS memory error: %s\n", /* Spurious warning
418
from
419
-Wunreachable-code
420
*/
421
safer_gnutls_strerror(ret));
422
gnutls_global_deinit();
408
423
return -1;
409
424
}
410
425
415
430
}
416
431
417
432
ret = gnutls_certificate_set_openpgp_key_file
418
(mc->cred, pubkeyfilename, seckeyfilename,
433
(mc.cred, pubkeyfilename, seckeyfilename,
419
434
GNUTLS_OPENPGP_FMT_BASE64);
420
if (ret != GNUTLS_E_SUCCESS) {
435
if(ret != GNUTLS_E_SUCCESS){
421
436
fprintf(stderr,
422
437
"Error[%d] while reading the OpenPGP key pair ('%s',"
423
438
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
427
442
}
428
443
429
444
/* GnuTLS server initialization */
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));
445
ret = gnutls_dh_params_init(&mc.dh_params);
446
if(ret != GNUTLS_E_SUCCESS){
447
fprintf(stderr, "Error in GnuTLS DH parameter initialization:"
448
" %s\n", safer_gnutls_strerror(ret));
434
449
goto globalfail;
435
450
}
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));
451
ret = gnutls_dh_params_generate2(mc.dh_params, mc.dh_bits);
452
if(ret != GNUTLS_E_SUCCESS){
453
fprintf(stderr, "Error in GnuTLS prime generation: %s\n",
454
safer_gnutls_strerror(ret));
440
455
goto globalfail;
441
456
}
442
457
443
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
458
gnutls_certificate_set_dh_params(mc.cred, mc.dh_params);
444
459
445
460
return 0;
446
461
447
462
globalfail:
448
463
449
gnutls_certificate_free_credentials(mc->cred);
464
gnutls_certificate_free_credentials(mc.cred);
450
465
gnutls_global_deinit();
451
gnutls_dh_params_deinit(mc->dh_params);
466
gnutls_dh_params_deinit(mc.dh_params);
452
467
return -1;
453
468
}
454
469
455
static int init_gnutls_session(mandos_context *mc,
456
gnutls_session_t *session){
470
static int init_gnutls_session(gnutls_session_t *session){
457
471
int ret;
458
472
/* GnuTLS session creation */
459
473
ret = gnutls_init(session, GNUTLS_SERVER);
460
if (ret != GNUTLS_E_SUCCESS){
474
if(ret != GNUTLS_E_SUCCESS){
461
475
fprintf(stderr, "Error in GnuTLS session initialization: %s\n",
462
476
safer_gnutls_strerror(ret));
463
477
}
464
478
465
479
{
466
480
const char *err;
467
ret = gnutls_priority_set_direct(*session, mc->priority, &err);
468
if (ret != GNUTLS_E_SUCCESS) {
481
ret = gnutls_priority_set_direct(*session, mc.priority, &err);
482
if(ret != GNUTLS_E_SUCCESS){
469
483
fprintf(stderr, "Syntax error at: %s\n", err);
470
484
fprintf(stderr, "GnuTLS error: %s\n",
471
485
safer_gnutls_strerror(ret));
472
gnutls_deinit (*session);
486
gnutls_deinit(*session);
473
487
return -1;
474
488
}
475
489
}
476
490
477
491
ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,
478
mc->cred);
479
if (ret != GNUTLS_E_SUCCESS) {
492
mc.cred);
493
if(ret != GNUTLS_E_SUCCESS){
480
494
fprintf(stderr, "Error setting GnuTLS credentials: %s\n",
481
495
safer_gnutls_strerror(ret));
482
gnutls_deinit (*session);
496
gnutls_deinit(*session);
483
497
return -1;
484
498
}
485
499
486
500
/* ignore client certificate if any. */
487
gnutls_certificate_server_set_request (*session,
488
GNUTLS_CERT_IGNORE);
501
gnutls_certificate_server_set_request(*session,
502
GNUTLS_CERT_IGNORE);
489
503
490
gnutls_dh_set_prime_bits (*session, mc->dh_bits);
504
gnutls_dh_set_prime_bits(*session, mc.dh_bits);
491
505
492
506
return 0;
493
507
}
499
513
/* Called when a Mandos server is found */
500
514
static int start_mandos_communication(const char *ip, uint16_t port,
501
515
AvahiIfIndex if_index,
502
mandos_context *mc){
516
int af){
503
517
int ret, tcp_sd;
504
union { struct sockaddr in; struct sockaddr_in6 in6; } to;
518
ssize_t sret;
519
union {
520
struct sockaddr_in in;
521
struct sockaddr_in6 in6;
522
} to;
505
523
char *buffer = NULL;
506
524
char *decrypted_buffer;
507
525
size_t buffer_length = 0;
509
527
ssize_t decrypted_buffer_size;
510
528
size_t written;
511
529
int retval = 0;
512
char interface[IF_NAMESIZE];
513
530
gnutls_session_t session;
514
515
ret = init_gnutls_session (mc, &session);
516
if (ret != 0){
531
int pf; /* Protocol family */
532
533
switch(af){
534
case AF_INET6:
535
pf = PF_INET6;
536
break;
537
case AF_INET:
538
pf = PF_INET;
539
break;
540
default:
541
fprintf(stderr, "Bad address family: %d\n", af);
542
return -1;
543
}
544
545
ret = init_gnutls_session(&session);
546
if(ret != 0){
517
547
return -1;
518
548
}
519
549
520
550
if(debug){
521
fprintf(stderr, "Setting up a tcp connection to %s, port %" PRIu16
551
fprintf(stderr, "Setting up a TCP connection to %s, port %" PRIu16
522
552
"\n", ip, port);
523
553
}
524
554
525
tcp_sd = socket(PF_INET6, SOCK_STREAM, 0);
526
if(tcp_sd < 0) {
555
tcp_sd = socket(pf, SOCK_STREAM, 0);
556
if(tcp_sd < 0){
527
557
perror("socket");
528
558
return -1;
529
559
}
530
560
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
539
561
memset(&to, 0, sizeof(to));
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 ){
562
if(af == AF_INET6){
563
to.in6.sin6_family = (uint16_t)af;
564
ret = inet_pton(af, ip, &to.in6.sin6_addr);
565
} else { /* IPv4 */
566
to.in.sin_family = (sa_family_t)af;
567
ret = inet_pton(af, ip, &to.in.sin_addr);
568
}
569
if(ret < 0 ){
545
570
perror("inet_pton");
546
571
return -1;
547
572
}
549
574
fprintf(stderr, "Bad address: %s\n", ip);
550
575
return -1;
551
576
}
552
to.in6.sin6_port = htons(port); /* Spurious warning */
553
554
to.in6.sin6_scope_id = (uint32_t)if_index;
577
if(af == AF_INET6){
578
to.in6.sin6_port = htons(port); /* Spurious warnings from
579
-Wconversion and
580
-Wunreachable-code */
581
582
if(IN6_IS_ADDR_LINKLOCAL /* Spurious warnings from */
583
(&to.in6.sin6_addr)){ /* -Wstrict-aliasing=2 or lower and
584
-Wunreachable-code*/
585
if(if_index == AVAHI_IF_UNSPEC){
586
fprintf(stderr, "An IPv6 link-local address is incomplete"
587
" without a network interface\n");
588
return -1;
589
}
590
/* Set the network interface number as scope */
591
to.in6.sin6_scope_id = (uint32_t)if_index;
592
}
593
} else {
594
to.in.sin_port = htons(port); /* Spurious warnings from
595
-Wconversion and
596
-Wunreachable-code */
597
}
555
598
556
599
if(debug){
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){
600
if(af == AF_INET6 and if_index != AVAHI_IF_UNSPEC){
601
char interface[IF_NAMESIZE];
602
if(if_indextoname((unsigned int)if_index, interface) == NULL){
603
perror("if_indextoname");
604
} else {
605
fprintf(stderr, "Connection to: %s%%%s, port %" PRIu16 "\n",
606
ip, interface, port);
607
}
608
} else {
609
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
610
port);
611
}
612
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
613
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
614
const char *pcret;
615
if(af == AF_INET6){
616
pcret = inet_ntop(af, &(to.in6.sin6_addr), addrstr,
617
sizeof(addrstr));
618
} else {
619
pcret = inet_ntop(af, &(to.in.sin_addr), addrstr,
620
sizeof(addrstr));
621
}
622
if(pcret == NULL){
562
623
perror("inet_ntop");
563
624
} else {
564
625
if(strcmp(addrstr, ip) != 0){
567
628
}
568
629
}
569
630
570
ret = connect(tcp_sd, &to.in, sizeof(to));
571
if (ret < 0){
631
if(af == AF_INET6){
632
ret = connect(tcp_sd, &to.in6, sizeof(to));
633
} else {
634
ret = connect(tcp_sd, &to.in, sizeof(to)); /* IPv4 */
635
}
636
if(ret < 0){
572
637
perror("connect");
573
638
return -1;
574
639
}
575
640
576
641
const char *out = mandos_protocol_version;
577
642
written = 0;
578
while (true){
643
while(true){
579
644
size_t out_size = strlen(out);
580
ret = TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
645
ret = (int)TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
581
646
out_size - written));
582
if (ret == -1){
647
if(ret == -1){
583
648
perror("write");
584
649
retval = -1;
585
650
goto mandos_end;
588
653
if(written < out_size){
589
654
continue;
590
655
} else {
591
if (out == mandos_protocol_version){
656
if(out == mandos_protocol_version){
592
657
written = 0;
593
658
out = "\r\n";
594
659
} else {
601
666
fprintf(stderr, "Establishing TLS session with %s\n", ip);
602
667
}
603
668
604
gnutls_transport_set_ptr (session, (gnutls_transport_ptr_t) tcp_sd);
669
gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t) tcp_sd);
605
670
606
671
do{
607
ret = gnutls_handshake (session);
672
ret = gnutls_handshake(session);
608
673
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
609
674
610
if (ret != GNUTLS_E_SUCCESS){
675
if(ret != GNUTLS_E_SUCCESS){
611
676
if(debug){
612
677
fprintf(stderr, "*** GnuTLS Handshake failed ***\n");
613
gnutls_perror (ret);
678
gnutls_perror(ret);
614
679
}
615
680
retval = -1;
616
681
goto mandos_end;
619
684
/* Read OpenPGP packet that contains the wanted password */
620
685
621
686
if(debug){
622
fprintf(stderr, "Retrieving pgp encrypted password from %s\n",
687
fprintf(stderr, "Retrieving OpenPGP encrypted password from %s\n",
623
688
ip);
624
689
}
625
690
626
691
while(true){
627
buffer_capacity = adjustbuffer(&buffer, buffer_length,
692
buffer_capacity = incbuffer(&buffer, buffer_length,
628
693
buffer_capacity);
629
if (buffer_capacity == 0){
630
perror("adjustbuffer");
694
if(buffer_capacity == 0){
695
perror("incbuffer");
631
696
retval = -1;
632
697
goto mandos_end;
633
698
}
634
699
635
ret = gnutls_record_recv(session, buffer+buffer_length,
636
BUFFER_SIZE);
637
if (ret == 0){
700
sret = gnutls_record_recv(session, buffer+buffer_length,
701
BUFFER_SIZE);
702
if(sret == 0){
638
703
break;
639
704
}
640
if (ret < 0){
641
switch(ret){
705
if(sret < 0){
706
switch(sret){
642
707
case GNUTLS_E_INTERRUPTED:
643
708
case GNUTLS_E_AGAIN:
644
709
break;
645
710
case GNUTLS_E_REHANDSHAKE:
646
711
do{
647
ret = gnutls_handshake (session);
712
ret = gnutls_handshake(session);
648
713
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
649
if (ret < 0){
714
if(ret < 0){
650
715
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
651
gnutls_perror (ret);
716
gnutls_perror(ret);
652
717
retval = -1;
653
718
goto mandos_end;
654
719
}
657
722
fprintf(stderr, "Unknown error while reading data from"
658
723
" encrypted session with Mandos server\n");
659
724
retval = -1;
660
gnutls_bye (session, GNUTLS_SHUT_RDWR);
725
gnutls_bye(session, GNUTLS_SHUT_RDWR);
661
726
goto mandos_end;
662
727
}
663
728
} else {
664
buffer_length += (size_t) ret;
729
buffer_length += (size_t) sret;
665
730
}
666
731
}
667
732
669
734
fprintf(stderr, "Closing TLS session\n");
670
735
}
671
736
672
gnutls_bye (session, GNUTLS_SHUT_RDWR);
737
gnutls_bye(session, GNUTLS_SHUT_RDWR);
673
738
674
if (buffer_length > 0){
675
decrypted_buffer_size = pgp_packet_decrypt(mc, buffer,
739
if(buffer_length > 0){
740
decrypted_buffer_size = pgp_packet_decrypt(buffer,
676
741
buffer_length,
677
742
&decrypted_buffer);
678
if (decrypted_buffer_size >= 0){
743
if(decrypted_buffer_size >= 0){
679
744
written = 0;
680
745
while(written < (size_t) decrypted_buffer_size){
681
ret = (int)fwrite (decrypted_buffer + written, 1,
682
(size_t)decrypted_buffer_size - written,
683
stdout);
746
ret = (int)fwrite(decrypted_buffer + written, 1,
747
(size_t)decrypted_buffer_size - written,
748
stdout);
684
749
if(ret == 0 and ferror(stdout)){
685
750
if(debug){
686
751
fprintf(stderr, "Error writing encrypted data: %s\n",
703
768
704
769
mandos_end:
705
770
free(buffer);
706
ret = TEMP_FAILURE_RETRY(close(tcp_sd));
771
ret = (int)TEMP_FAILURE_RETRY(close(tcp_sd));
707
772
if(ret == -1){
708
773
perror("close");
709
774
}
710
gnutls_deinit (session);
775
gnutls_deinit(session);
711
776
return retval;
712
777
}
713
778
714
779
static void resolve_callback(AvahiSServiceResolver *r,
715
780
AvahiIfIndex interface,
716
AVAHI_GCC_UNUSED AvahiProtocol protocol,
781
AvahiProtocol proto,
717
782
AvahiResolverEvent event,
718
783
const char *name,
719
784
const char *type,
724
789
AVAHI_GCC_UNUSED AvahiStringList *txt,
725
790
AVAHI_GCC_UNUSED AvahiLookupResultFlags
726
791
flags,
727
void* userdata) {
728
mandos_context *mc = userdata;
792
AVAHI_GCC_UNUSED void* userdata){
729
793
assert(r);
730
794
731
795
/* Called whenever a service has been resolved successfully or
732
796
timed out */
733
797
734
switch (event) {
798
switch(event){
735
799
default:
736
800
case AVAHI_RESOLVER_FAILURE:
737
801
fprintf(stderr, "(Avahi Resolver) Failed to resolve service '%s'"
738
802
" of type '%s' in domain '%s': %s\n", name, type, domain,
739
avahi_strerror(avahi_server_errno(mc->server)));
803
avahi_strerror(avahi_server_errno(mc.server)));
740
804
break;
741
805
742
806
case AVAHI_RESOLVER_FOUND:
745
809
avahi_address_snprint(ip, sizeof(ip), address);
746
810
if(debug){
747
811
fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %"
748
PRIu16 ") on port %d\n", name, host_name, ip,
749
interface, port);
812
PRIdMAX ") on port %" PRIu16 "\n", name, host_name,
813
ip, (intmax_t)interface, port);
750
814
}
751
int ret = start_mandos_communication(ip, port, interface, mc);
752
if (ret == 0){
753
avahi_simple_poll_quit(mc->simple_poll);
815
int ret = start_mandos_communication(ip, port, interface,
816
avahi_proto_to_af(proto));
817
if(ret == 0){
818
avahi_simple_poll_quit(mc.simple_poll);
754
819
}
755
820
}
756
821
}
757
822
avahi_s_service_resolver_free(r);
758
823
}
759
824
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;
825
static void browse_callback(AvahiSServiceBrowser *b,
826
AvahiIfIndex interface,
827
AvahiProtocol protocol,
828
AvahiBrowserEvent event,
829
const char *name,
830
const char *type,
831
const char *domain,
832
AVAHI_GCC_UNUSED AvahiLookupResultFlags
833
flags,
834
AVAHI_GCC_UNUSED void* userdata){
771
835
assert(b);
772
836
773
837
/* Called whenever a new services becomes available on the LAN or
774
838
is removed from the LAN */
775
839
776
switch (event) {
840
switch(event){
777
841
default:
778
842
case AVAHI_BROWSER_FAILURE:
779
843
780
844
fprintf(stderr, "(Avahi browser) %s\n",
781
avahi_strerror(avahi_server_errno(mc->server)));
782
avahi_simple_poll_quit(mc->simple_poll);
845
avahi_strerror(avahi_server_errno(mc.server)));
846
avahi_simple_poll_quit(mc.simple_poll);
783
847
return;
784
848
785
849
case AVAHI_BROWSER_NEW:
788
852
the callback function is called the Avahi server will free the
789
853
resolver for us. */
790
854
791
if (!(avahi_s_service_resolver_new(mc->server, interface,
855
if(!(avahi_s_service_resolver_new(mc.server, interface,
792
856
protocol, name, type, domain,
793
857
AVAHI_PROTO_INET6, 0,
794
resolve_callback, mc)))
858
resolve_callback, NULL)))
795
859
fprintf(stderr, "Avahi: Failed to resolve service '%s': %s\n",
796
name, avahi_strerror(avahi_server_errno(mc->server)));
860
name, avahi_strerror(avahi_server_errno(mc.server)));
797
861
break;
798
862
799
863
case AVAHI_BROWSER_REMOVE:
808
872
}
809
873
}
810
874
875
sig_atomic_t quit_now = 0;
876
877
static void handle_sigterm(__attribute__((unused)) int sig){
878
if(quit_now){
879
return;
880
}
881
quit_now = 1;
882
int old_errno = errno;
883
if(mc.simple_poll != NULL){
884
avahi_simple_poll_quit(mc.simple_poll);
885
}
886
errno = old_errno;
887
}
888
811
889
int main(int argc, char *argv[]){
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);
890
AvahiSServiceBrowser *sb = NULL;
891
int error;
892
int ret;
893
intmax_t tmpmax;
894
int numchars;
895
int exitcode = EXIT_SUCCESS;
896
const char *interface = "eth0";
897
struct ifreq network;
898
int sd;
899
uid_t uid;
900
gid_t gid;
901
char *connect_to = NULL;
902
char tempdir[] = "/tmp/mandosXXXXXX";
903
bool tempdir_created = false;
904
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
905
const char *seckey = PATHDIR "/" SECKEY;
906
const char *pubkey = PATHDIR "/" PUBKEY;
907
908
/* Initialize Mandos context */
909
mc = (mandos_context){ .simple_poll = NULL, .server = NULL,
910
.dh_bits = 1024, .priority = "SECURE256"
911
":!CTYPE-X.509:+CTYPE-OPENPGP" };
912
bool gnutls_initialized = false;
913
bool gpgme_initialized = false;
914
double delay = 2.5;
915
916
struct sigaction old_sigterm_action;
917
struct sigaction sigterm_action = { .sa_handler = handle_sigterm };
918
919
{
920
struct argp_option options[] = {
921
{ .name = "debug", .key = 128,
922
.doc = "Debug mode", .group = 3 },
923
{ .name = "connect", .key = 'c',
924
.arg = "ADDRESS:PORT",
925
.doc = "Connect directly to a specific Mandos server",
926
.group = 1 },
927
{ .name = "interface", .key = 'i',
928
.arg = "NAME",
929
.doc = "Network interface that will be used to search for"
930
" Mandos servers",
931
.group = 1 },
932
{ .name = "seckey", .key = 's',
933
.arg = "FILE",
934
.doc = "OpenPGP secret key file base name",
935
.group = 1 },
936
{ .name = "pubkey", .key = 'p',
937
.arg = "FILE",
938
.doc = "OpenPGP public key file base name",
939
.group = 2 },
940
{ .name = "dh-bits", .key = 129,
941
.arg = "BITS",
942
.doc = "Bit length of the prime number used in the"
943
" Diffie-Hellman key exchange",
944
.group = 2 },
945
{ .name = "priority", .key = 130,
946
.arg = "STRING",
947
.doc = "GnuTLS priority string for the TLS handshake",
948
.group = 1 },
949
{ .name = "delay", .key = 131,
950
.arg = "SECONDS",
951
.doc = "Maximum delay to wait for interface startup",
952
.group = 2 },
953
{ .name = NULL }
954
};
955
956
error_t parse_opt(int key, char *arg,
957
struct argp_state *state){
958
switch(key){
959
case 128: /* --debug */
960
debug = true;
961
break;
962
case 'c': /* --connect */
963
connect_to = arg;
964
break;
965
case 'i': /* --interface */
966
interface = arg;
967
break;
968
case 's': /* --seckey */
969
seckey = arg;
970
break;
971
case 'p': /* --pubkey */
972
pubkey = arg;
973
break;
974
case 129: /* --dh-bits */
975
ret = sscanf(arg, "%" SCNdMAX "%n", &tmpmax, &numchars);
976
if(ret < 1 or tmpmax != (typeof(mc.dh_bits))tmpmax
977
or arg[numchars] != '\0'){
978
fprintf(stderr, "Bad number of DH bits\n");
979
exit(EXIT_FAILURE);
980
}
981
mc.dh_bits = (typeof(mc.dh_bits))tmpmax;
982
break;
983
case 130: /* --priority */
984
mc.priority = arg;
985
break;
986
case 131: /* --delay */
987
ret = sscanf(arg, "%lf%n", &delay, &numchars);
988
if(ret < 1 or arg[numchars] != '\0'){
989
fprintf(stderr, "Bad delay\n");
990
exit(EXIT_FAILURE);
991
}
992
break;
993
case ARGP_KEY_ARG:
994
argp_usage(state);
995
case ARGP_KEY_END:
996
break;
997
default:
998
return ARGP_ERR_UNKNOWN;
999
}
1000
return 0;
1001
}
1002
1003
struct argp argp = { .options = options, .parser = parse_opt,
1004
.args_doc = "",
1005
.doc = "Mandos client -- Get and decrypt"
1006
" passwords from a Mandos server" };
1007
ret = argp_parse(&argp, argc, argv, 0, 0, NULL);
1008
if(ret == ARGP_ERR_UNKNOWN){
1009
fprintf(stderr, "Unknown error while parsing arguments\n");
1010
exitcode = EXIT_FAILURE;
1011
goto end;
1012
}
1013
}
1014
1015
/* If the interface is down, bring it up */
1016
if(interface[0] != '\0'){
1017
#ifdef __linux__
1018
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1019
messages to mess up the prompt */
1020
ret = klogctl(8, NULL, 5);
1021
bool restore_loglevel = true;
1022
if(ret == -1){
1023
restore_loglevel = false;
1024
perror("klogctl");
1025
}
1026
#endif /* __linux__ */
1027
1028
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1029
if(sd < 0){
1030
perror("socket");
1031
exitcode = EXIT_FAILURE;
1032
#ifdef __linux__
1033
if(restore_loglevel){
1034
ret = klogctl(7, NULL, 0);
1035
if(ret == -1){
1036
perror("klogctl");
1037
}
1038
}
1039
#endif /* __linux__ */
1040
goto end;
1041
}
1042
strcpy(network.ifr_name, interface);
1043
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1044
if(ret == -1){
1045
perror("ioctl SIOCGIFFLAGS");
1046
#ifdef __linux__
1047
if(restore_loglevel){
1048
ret = klogctl(7, NULL, 0);
1049
if(ret == -1){
1050
perror("klogctl");
1051
}
1052
}
1053
#endif /* __linux__ */
1054
exitcode = EXIT_FAILURE;
1055
goto end;
1056
}
1057
if((network.ifr_flags & IFF_UP) == 0){
1058
network.ifr_flags |= IFF_UP;
1059
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1060
if(ret == -1){
1061
perror("ioctl SIOCSIFFLAGS");
1062
exitcode = EXIT_FAILURE;
1063
#ifdef __linux__
1064
if(restore_loglevel){
1065
ret = klogctl(7, NULL, 0);
1066
if(ret == -1){
1067
perror("klogctl");
892
1068
}
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;
903
1069
}
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;
1070
#endif /* __linux__ */
915
1071
goto end;
916
1072
}
917
1073
}
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);
1074
/* sleep checking until interface is running */
1075
for(int i=0; i < delay * 4; i++){
928
1076
ret = ioctl(sd, SIOCGIFFLAGS, &network);
929
1077
if(ret == -1){
930
1078
perror("ioctl SIOCGIFFLAGS");
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));
1079
} else if(network.ifr_flags & IFF_RUNNING){
1080
break;
1081
}
1082
struct timespec sleeptime = { .tv_nsec = 250000000 };
1083
ret = nanosleep(&sleeptime, NULL);
1084
if(ret == -1 and errno != EINTR){
1085
perror("nanosleep");
1086
}
1087
}
1088
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1089
if(ret == -1){
1090
perror("close");
1091
}
1092
#ifdef __linux__
1093
if(restore_loglevel){
1094
/* Restores kernel loglevel to default */
1095
ret = klogctl(7, NULL, 0);
944
1096
if(ret == -1){
945
perror("close");
1097
perror("klogctl");
946
1098
}
947
1099
}
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
1100
#endif /* __linux__ */
1101
}
1102
1103
uid = getuid();
1104
gid = getgid();
1105
1106
errno = 0;
1107
setgid(gid);
1108
if(ret == -1){
1109
perror("setgid");
1110
}
1111
1112
ret = setuid(uid);
1113
if(ret == -1){
1114
perror("setuid");
1115
}
1116
1117
ret = init_gnutls_global(pubkey, seckey);
1118
if(ret == -1){
1119
fprintf(stderr, "init_gnutls_global failed\n");
1120
exitcode = EXIT_FAILURE;
1121
goto end;
1122
} else {
1123
gnutls_initialized = true;
1124
}
1125
1126
if(mkdtemp(tempdir) == NULL){
1127
perror("mkdtemp");
1128
goto end;
1129
}
1130
tempdir_created = true;
1131
1132
if(not init_gpgme(pubkey, seckey, tempdir)){
1133
fprintf(stderr, "init_gpgme failed\n");
1134
exitcode = EXIT_FAILURE;
1135
goto end;
1136
} else {
1137
gpgme_initialized = true;
1138
}
1139
1140
if(interface[0] != '\0'){
985
1141
if_index = (AvahiIfIndex) if_nametoindex(interface);
986
1142
if(if_index == 0){
987
1143
fprintf(stderr, "No such interface: \"%s\"\n", interface);
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
1144
exitcode = EXIT_FAILURE;
1145
goto end;
1146
}
1147
}
1148
1149
if(connect_to != NULL){
1150
/* Connect directly, do not use Zeroconf */
1151
/* (Mainly meant for debugging) */
1152
char *address = strrchr(connect_to, ':');
1153
if(address == NULL){
1154
fprintf(stderr, "No colon in address\n");
1155
exitcode = EXIT_FAILURE;
1156
goto end;
1157
}
1158
uint16_t port;
1159
ret = sscanf(address+1, "%" SCNdMAX "%n", &tmpmax, &numchars);
1160
if(ret < 1 or tmpmax != (uint16_t)tmpmax
1161
or address[numchars+1] != '\0'){
1162
fprintf(stderr, "Bad port number\n");
1163
exitcode = EXIT_FAILURE;
1164
goto end;
1165
}
1166
port = (uint16_t)tmpmax;
1167
*address = '\0';
1168
address = connect_to;
1169
/* Colon in address indicates IPv6 */
1170
int af;
1171
if(strchr(address, ':') != NULL){
1172
af = AF_INET6;
1173
} else {
1174
af = AF_INET;
1175
}
1176
ret = start_mandos_communication(address, port, if_index, af);
1177
if(ret < 0){
1178
exitcode = EXIT_FAILURE;
1179
} else {
1180
exitcode = EXIT_SUCCESS;
1181
}
1182
goto end;
1183
}
1184
1185
if(not debug){
1186
avahi_set_log_function(empty_log);
1187
}
1188
1189
/* Initialize the pseudo-RNG for Avahi */
1190
srand((unsigned int) time(NULL));
1191
1192
/* Allocate main Avahi loop object */
1193
mc.simple_poll = avahi_simple_poll_new();
1194
if(mc.simple_poll == NULL){
1195
fprintf(stderr, "Avahi: Failed to create simple poll object.\n");
1196
exitcode = EXIT_FAILURE;
1197
goto end;
1198
}
1199
1200
{
1201
AvahiServerConfig config;
1202
/* Do not publish any local Zeroconf records */
1203
avahi_server_config_init(&config);
1204
config.publish_hinfo = 0;
1205
config.publish_addresses = 0;
1206
config.publish_workstation = 0;
1207
config.publish_domain = 0;
1208
1209
/* Allocate a new server */
1210
mc.server = avahi_server_new(avahi_simple_poll_get
1211
(mc.simple_poll), &config, NULL,
1212
NULL, &error);
1213
1214
/* Free the Avahi configuration data */
1215
avahi_server_config_free(&config);
1216
}
1217
1218
/* Check if creating the Avahi server object succeeded */
1219
if(mc.server == NULL){
1220
fprintf(stderr, "Failed to create Avahi server: %s\n",
1221
avahi_strerror(error));
1222
exitcode = EXIT_FAILURE;
1223
goto end;
1224
}
1225
1226
/* Create the Avahi service browser */
1227
sb = avahi_s_service_browser_new(mc.server, if_index,
1228
AVAHI_PROTO_INET6, "_mandos._tcp",
1229
NULL, 0, browse_callback, NULL);
1230
if(sb == NULL){
1231
fprintf(stderr, "Failed to create service browser: %s\n",
1232
avahi_strerror(avahi_server_errno(mc.server)));
1233
exitcode = EXIT_FAILURE;
1234
goto end;
1235
}
1236
1237
sigemptyset(&sigterm_action.sa_mask);
1238
ret = sigaddset(&sigterm_action.sa_mask, SIGINT);
1239
if(ret == -1){
1240
perror("sigaddset");
1241
exitcode = EXIT_FAILURE;
1242
goto end;
1243
}
1244
ret = sigaddset(&sigterm_action.sa_mask, SIGHUP);
1245
if(ret == -1){
1246
perror("sigaddset");
1247
exitcode = EXIT_FAILURE;
1248
goto end;
1249
}
1250
ret = sigaddset(&sigterm_action.sa_mask, SIGTERM);
1251
if(ret == -1){
1252
perror("sigaddset");
1253
exitcode = EXIT_FAILURE;
1254
goto end;
1255
}
1256
ret = sigaction(SIGTERM, &sigterm_action, &old_sigterm_action);
1257
if(ret == -1){
1258
perror("sigaction");
1259
exitcode = EXIT_FAILURE;
1260
goto end;
1261
}
1262
1263
/* Run the main loop */
1264
1265
if(debug){
1266
fprintf(stderr, "Starting Avahi loop search\n");
1267
}
1268
1269
avahi_simple_poll_loop(mc.simple_poll);
1270
1080
1271
end:
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){
1272
1273
if(debug){
1274
fprintf(stderr, "%s exiting\n", argv[0]);
1275
}
1276
1277
/* Cleanup things */
1278
if(sb != NULL)
1279
avahi_s_service_browser_free(sb);
1280
1281
if(mc.server != NULL)
1282
avahi_server_free(mc.server);
1283
1284
if(mc.simple_poll != NULL)
1285
avahi_simple_poll_free(mc.simple_poll);
1286
1287
if(gnutls_initialized){
1288
gnutls_certificate_free_credentials(mc.cred);
1289
gnutls_global_deinit();
1290
gnutls_dh_params_deinit(mc.dh_params);
1291
}
1292
1293
if(gpgme_initialized){
1294
gpgme_release(mc.ctx);
1295
}
1296
1297
/* Removes the temp directory used by GPGME */
1298
if(tempdir_created){
1299
DIR *d;
1300
struct dirent *direntry;
1301
d = opendir(tempdir);
1302
if(d == NULL){
1303
if(errno != ENOENT){
1112
1304
perror("opendir");
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;
1305
}
1306
} else {
1307
while(true){
1308
direntry = readdir(d);
1309
if(direntry == NULL){
1310
break;
1311
}
1312
/* Skip "." and ".." */
1313
if(direntry->d_name[0] == '.'
1314
and (direntry->d_name[1] == '\0'
1315
or (direntry->d_name[1] == '.'
1316
and direntry->d_name[2] == '\0'))){
1317
continue;
1318
}
1319
char *fullname = NULL;
1320
ret = asprintf(&fullname, "%s/%s", tempdir,
1321
direntry->d_name);
1322
if(ret < 0){
1323
perror("asprintf");
1324
continue;
1325
}
1326
ret = remove(fullname);
1327
if(ret == -1){
1328
fprintf(stderr, "remove(\"%s\"): %s\n", fullname,
1329
strerror(errno));
1330
}
1331
free(fullname);
1332
}
1333
closedir(d);
1334
}
1335
ret = rmdir(tempdir);
1336
if(ret == -1 and errno != ENOENT){
1337
perror("rmdir");
1338
}
1339
}
1340
1341
return exitcode;
1144
1342
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0