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24.1.134
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: plugins.d/mandos-client.c
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- Committer: Björn Påhlsson
- Date: 2009-02-09 05:09:39 UTC
- mto: (237.7.1 mandos) (24.1.154 mandos)
- mto: This revision was merged to the branch mainline in revision 250.
- Revision ID: belorn@braxen-20090209050939-ml95liuwtbn9kjtb
plugin-runner: Added support for empty string arguments
Fixed bug where IP:port argument failed
mandos-client: Fixed bug where files wasnt removed after sigterm signal
Fixed bug where IP:port argument failed
mandos-client: Fixed bug where files wasnt removed after sigterm signal
- files added:
- debian/watch
- files removed:
- debian/mandos-client.config
- files renamed:
- mandos-list => mandos-ctl
- 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(), sigaction(), SIGTERM, sigaction */
79
#ifdef __linux__
80
#include <sys/klog.h> /* klogctl() */
81
#endif
75
82
76
83
/* Avahi */
77
84
/* All Avahi types, constants and functions
90
97
gnutls_*
91
98
init_gnutls_session(),
92
99
GNUTLS_* */
93
#include <gnutls/openpgp.h> /* gnutls_certificate_set_openpgp_key_file(),
100
#include <gnutls/openpgp.h>
101
/* gnutls_certificate_set_openpgp_key_file(),
94
102
GNUTLS_OPENPGP_FMT_BASE64 */
95
103
96
104
/* GPGME */
122
130
gpgme_ctx_t ctx;
123
131
} mandos_context;
124
132
133
/* global context so signal handler can reach it*/
134
mandos_context mc;
135
125
136
/*
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.
137
* Make additional room in "buffer" for at least BUFFER_SIZE
138
* additional bytes. "buffer_capacity" is how much is currently
139
* allocated, "buffer_length" is how much is already used.
129
140
*/
130
size_t adjustbuffer(char **buffer, size_t buffer_length,
141
size_t incbuffer(char **buffer, size_t buffer_length,
131
142
size_t buffer_capacity){
132
if (buffer_length + BUFFER_SIZE > buffer_capacity){
143
if(buffer_length + BUFFER_SIZE > buffer_capacity){
133
144
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
134
if (buffer == NULL){
145
if(buffer == NULL){
135
146
return 0;
136
147
}
137
148
buffer_capacity += BUFFER_SIZE;
142
153
/*
143
154
* Initialize GPGME.
144
155
*/
145
static bool init_gpgme(mandos_context *mc, const char *seckey,
156
static bool init_gpgme(const char *seckey,
146
157
const char *pubkey, const char *tempdir){
147
158
int ret;
148
159
gpgme_error_t rc;
150
161
151
162
152
163
/*
153
* Helper function to insert pub and seckey to the enigne keyring.
164
* Helper function to insert pub and seckey to the engine keyring.
154
165
*/
155
166
bool import_key(const char *filename){
156
167
int fd;
157
168
gpgme_data_t pgp_data;
158
169
159
fd = TEMP_FAILURE_RETRY(open(filename, O_RDONLY));
170
fd = (int)TEMP_FAILURE_RETRY(open(filename, O_RDONLY));
160
171
if(fd == -1){
161
172
perror("open");
162
173
return false;
163
174
}
164
175
165
176
rc = gpgme_data_new_from_fd(&pgp_data, fd);
166
if (rc != GPG_ERR_NO_ERROR){
177
if(rc != GPG_ERR_NO_ERROR){
167
178
fprintf(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
168
179
gpgme_strsource(rc), gpgme_strerror(rc));
169
180
return false;
170
181
}
171
182
172
rc = gpgme_op_import(mc->ctx, pgp_data);
173
if (rc != GPG_ERR_NO_ERROR){
183
rc = gpgme_op_import(mc.ctx, pgp_data);
184
if(rc != GPG_ERR_NO_ERROR){
174
185
fprintf(stderr, "bad gpgme_op_import: %s: %s\n",
175
186
gpgme_strsource(rc), gpgme_strerror(rc));
176
187
return false;
177
188
}
178
189
179
ret = TEMP_FAILURE_RETRY(close(fd));
190
ret = (int)TEMP_FAILURE_RETRY(close(fd));
180
191
if(ret == -1){
181
192
perror("close");
182
193
}
184
195
return true;
185
196
}
186
197
187
if (debug){
198
if(debug){
188
199
fprintf(stderr, "Initialize gpgme\n");
189
200
}
190
201
191
202
/* Init GPGME */
192
203
gpgme_check_version(NULL);
193
204
rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
194
if (rc != GPG_ERR_NO_ERROR){
205
if(rc != GPG_ERR_NO_ERROR){
195
206
fprintf(stderr, "bad gpgme_engine_check_version: %s: %s\n",
196
207
gpgme_strsource(rc), gpgme_strerror(rc));
197
208
return false;
198
209
}
199
210
200
211
/* Set GPGME home directory for the OpenPGP engine only */
201
rc = gpgme_get_engine_info (&engine_info);
202
if (rc != GPG_ERR_NO_ERROR){
212
rc = gpgme_get_engine_info(&engine_info);
213
if(rc != GPG_ERR_NO_ERROR){
203
214
fprintf(stderr, "bad gpgme_get_engine_info: %s: %s\n",
204
215
gpgme_strsource(rc), gpgme_strerror(rc));
205
216
return false;
218
229
}
219
230
220
231
/* Create new GPGME "context" */
221
rc = gpgme_new(&(mc->ctx));
222
if (rc != GPG_ERR_NO_ERROR){
232
rc = gpgme_new(&(mc.ctx));
233
if(rc != GPG_ERR_NO_ERROR){
223
234
fprintf(stderr, "bad gpgme_new: %s: %s\n",
224
235
gpgme_strsource(rc), gpgme_strerror(rc));
225
236
return false;
226
237
}
227
238
228
if (not import_key(pubkey) or not import_key(seckey)){
239
if(not import_key(pubkey) or not import_key(seckey)){
229
240
return false;
230
241
}
231
242
236
247
* Decrypt OpenPGP data.
237
248
* Returns -1 on error
238
249
*/
239
static ssize_t pgp_packet_decrypt (const mandos_context *mc,
240
const char *cryptotext,
241
size_t crypto_size,
242
char **plaintext){
250
static ssize_t pgp_packet_decrypt(const char *cryptotext,
251
size_t crypto_size,
252
char **plaintext){
243
253
gpgme_data_t dh_crypto, dh_plain;
244
254
gpgme_error_t rc;
245
255
ssize_t ret;
246
256
size_t plaintext_capacity = 0;
247
257
ssize_t plaintext_length = 0;
248
258
249
if (debug){
259
if(debug){
250
260
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
251
261
}
252
262
253
263
/* Create new GPGME data buffer from memory cryptotext */
254
264
rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,
255
265
0);
256
if (rc != GPG_ERR_NO_ERROR){
266
if(rc != GPG_ERR_NO_ERROR){
257
267
fprintf(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
258
268
gpgme_strsource(rc), gpgme_strerror(rc));
259
269
return -1;
261
271
262
272
/* Create new empty GPGME data buffer for the plaintext */
263
273
rc = gpgme_data_new(&dh_plain);
264
if (rc != GPG_ERR_NO_ERROR){
274
if(rc != GPG_ERR_NO_ERROR){
265
275
fprintf(stderr, "bad gpgme_data_new: %s: %s\n",
266
276
gpgme_strsource(rc), gpgme_strerror(rc));
267
277
gpgme_data_release(dh_crypto);
270
280
271
281
/* Decrypt data from the cryptotext data buffer to the plaintext
272
282
data buffer */
273
rc = gpgme_op_decrypt(mc->ctx, dh_crypto, dh_plain);
274
if (rc != GPG_ERR_NO_ERROR){
283
rc = gpgme_op_decrypt(mc.ctx, dh_crypto, dh_plain);
284
if(rc != GPG_ERR_NO_ERROR){
275
285
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
276
286
gpgme_strsource(rc), gpgme_strerror(rc));
277
287
plaintext_length = -1;
278
if (debug){
288
if(debug){
279
289
gpgme_decrypt_result_t result;
280
result = gpgme_op_decrypt_result(mc->ctx);
281
if (result == NULL){
290
result = gpgme_op_decrypt_result(mc.ctx);
291
if(result == NULL){
282
292
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
283
293
} else {
284
294
fprintf(stderr, "Unsupported algorithm: %s\n",
311
321
}
312
322
313
323
/* Seek back to the beginning of the GPGME plaintext data buffer */
314
if (gpgme_data_seek(dh_plain, (off_t) 0, SEEK_SET) == -1){
324
if(gpgme_data_seek(dh_plain, (off_t)0, SEEK_SET) == -1){
315
325
perror("gpgme_data_seek");
316
326
plaintext_length = -1;
317
327
goto decrypt_end;
319
329
320
330
*plaintext = NULL;
321
331
while(true){
322
plaintext_capacity = adjustbuffer(plaintext,
332
plaintext_capacity = incbuffer(plaintext,
323
333
(size_t)plaintext_length,
324
334
plaintext_capacity);
325
if (plaintext_capacity == 0){
326
perror("adjustbuffer");
335
if(plaintext_capacity == 0){
336
perror("incbuffer");
327
337
plaintext_length = -1;
328
338
goto decrypt_end;
329
339
}
331
341
ret = gpgme_data_read(dh_plain, *plaintext + plaintext_length,
332
342
BUFFER_SIZE);
333
343
/* Print the data, if any */
334
if (ret == 0){
344
if(ret == 0){
335
345
/* EOF */
336
346
break;
337
347
}
361
371
return plaintext_length;
362
372
}
363
373
364
static const char * safer_gnutls_strerror (int value) {
365
const char *ret = gnutls_strerror (value); /* Spurious warning */
366
if (ret == NULL)
374
static const char * safer_gnutls_strerror(int value){
375
const char *ret = gnutls_strerror(value); /* Spurious warning from
376
-Wunreachable-code */
377
if(ret == NULL)
367
378
ret = "(unknown)";
368
379
return ret;
369
380
}
374
385
fprintf(stderr, "GnuTLS: %s", string);
375
386
}
376
387
377
static int init_gnutls_global(mandos_context *mc,
378
const char *pubkeyfilename,
388
static int init_gnutls_global(const char *pubkeyfilename,
379
389
const char *seckeyfilename){
380
390
int ret;
381
391
384
394
}
385
395
386
396
ret = gnutls_global_init();
387
if (ret != GNUTLS_E_SUCCESS) {
388
fprintf (stderr, "GnuTLS global_init: %s\n",
389
safer_gnutls_strerror(ret));
397
if(ret != GNUTLS_E_SUCCESS){
398
fprintf(stderr, "GnuTLS global_init: %s\n",
399
safer_gnutls_strerror(ret));
390
400
return -1;
391
401
}
392
402
393
if (debug){
403
if(debug){
394
404
/* "Use a log level over 10 to enable all debugging options."
395
405
* - GnuTLS manual
396
406
*/
399
409
}
400
410
401
411
/* 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 ();
412
gnutls_certificate_allocate_credentials(&mc.cred);
413
if(ret != GNUTLS_E_SUCCESS){
414
fprintf(stderr, "GnuTLS memory error: %s\n", /* Spurious warning
415
from
416
-Wunreachable-code
417
*/
418
safer_gnutls_strerror(ret));
419
gnutls_global_deinit();
408
420
return -1;
409
421
}
410
422
415
427
}
416
428
417
429
ret = gnutls_certificate_set_openpgp_key_file
418
(mc->cred, pubkeyfilename, seckeyfilename,
430
(mc.cred, pubkeyfilename, seckeyfilename,
419
431
GNUTLS_OPENPGP_FMT_BASE64);
420
if (ret != GNUTLS_E_SUCCESS) {
432
if(ret != GNUTLS_E_SUCCESS){
421
433
fprintf(stderr,
422
434
"Error[%d] while reading the OpenPGP key pair ('%s',"
423
435
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
427
439
}
428
440
429
441
/* 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));
442
ret = gnutls_dh_params_init(&mc.dh_params);
443
if(ret != GNUTLS_E_SUCCESS){
444
fprintf(stderr, "Error in GnuTLS DH parameter initialization:"
445
" %s\n", safer_gnutls_strerror(ret));
434
446
goto globalfail;
435
447
}
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));
448
ret = gnutls_dh_params_generate2(mc.dh_params, mc.dh_bits);
449
if(ret != GNUTLS_E_SUCCESS){
450
fprintf(stderr, "Error in GnuTLS prime generation: %s\n",
451
safer_gnutls_strerror(ret));
440
452
goto globalfail;
441
453
}
442
454
443
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
455
gnutls_certificate_set_dh_params(mc.cred, mc.dh_params);
444
456
445
457
return 0;
446
458
447
459
globalfail:
448
460
449
gnutls_certificate_free_credentials(mc->cred);
461
gnutls_certificate_free_credentials(mc.cred);
450
462
gnutls_global_deinit();
451
gnutls_dh_params_deinit(mc->dh_params);
463
gnutls_dh_params_deinit(mc.dh_params);
452
464
return -1;
453
465
}
454
466
455
static int init_gnutls_session(mandos_context *mc,
456
gnutls_session_t *session){
467
static int init_gnutls_session(gnutls_session_t *session){
457
468
int ret;
458
469
/* GnuTLS session creation */
459
470
ret = gnutls_init(session, GNUTLS_SERVER);
460
if (ret != GNUTLS_E_SUCCESS){
471
if(ret != GNUTLS_E_SUCCESS){
461
472
fprintf(stderr, "Error in GnuTLS session initialization: %s\n",
462
473
safer_gnutls_strerror(ret));
463
474
}
464
475
465
476
{
466
477
const char *err;
467
ret = gnutls_priority_set_direct(*session, mc->priority, &err);
468
if (ret != GNUTLS_E_SUCCESS) {
478
ret = gnutls_priority_set_direct(*session, mc.priority, &err);
479
if(ret != GNUTLS_E_SUCCESS){
469
480
fprintf(stderr, "Syntax error at: %s\n", err);
470
481
fprintf(stderr, "GnuTLS error: %s\n",
471
482
safer_gnutls_strerror(ret));
472
gnutls_deinit (*session);
483
gnutls_deinit(*session);
473
484
return -1;
474
485
}
475
486
}
476
487
477
488
ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,
478
mc->cred);
479
if (ret != GNUTLS_E_SUCCESS) {
489
mc.cred);
490
if(ret != GNUTLS_E_SUCCESS){
480
491
fprintf(stderr, "Error setting GnuTLS credentials: %s\n",
481
492
safer_gnutls_strerror(ret));
482
gnutls_deinit (*session);
493
gnutls_deinit(*session);
483
494
return -1;
484
495
}
485
496
486
497
/* ignore client certificate if any. */
487
gnutls_certificate_server_set_request (*session,
488
GNUTLS_CERT_IGNORE);
498
gnutls_certificate_server_set_request(*session,
499
GNUTLS_CERT_IGNORE);
489
500
490
gnutls_dh_set_prime_bits (*session, mc->dh_bits);
501
gnutls_dh_set_prime_bits(*session, mc.dh_bits);
491
502
492
503
return 0;
493
504
}
499
510
/* Called when a Mandos server is found */
500
511
static int start_mandos_communication(const char *ip, uint16_t port,
501
512
AvahiIfIndex if_index,
502
mandos_context *mc){
513
int af){
503
514
int ret, tcp_sd;
504
union { struct sockaddr in; struct sockaddr_in6 in6; } to;
515
ssize_t sret;
516
union {
517
struct sockaddr_in in;
518
struct sockaddr_in6 in6;
519
} to;
505
520
char *buffer = NULL;
506
521
char *decrypted_buffer;
507
522
size_t buffer_length = 0;
509
524
ssize_t decrypted_buffer_size;
510
525
size_t written;
511
526
int retval = 0;
512
char interface[IF_NAMESIZE];
513
527
gnutls_session_t session;
514
515
ret = init_gnutls_session (mc, &session);
516
if (ret != 0){
528
int pf; /* Protocol family */
529
530
switch(af){
531
case AF_INET6:
532
pf = PF_INET6;
533
break;
534
case AF_INET:
535
pf = PF_INET;
536
break;
537
default:
538
fprintf(stderr, "Bad address family: %d\n", af);
539
return -1;
540
}
541
542
ret = init_gnutls_session(&session);
543
if(ret != 0){
517
544
return -1;
518
545
}
519
546
520
547
if(debug){
521
fprintf(stderr, "Setting up a tcp connection to %s, port %" PRIu16
548
fprintf(stderr, "Setting up a TCP connection to %s, port %" PRIu16
522
549
"\n", ip, port);
523
550
}
524
551
525
tcp_sd = socket(PF_INET6, SOCK_STREAM, 0);
526
if(tcp_sd < 0) {
552
tcp_sd = socket(pf, SOCK_STREAM, 0);
553
if(tcp_sd < 0){
527
554
perror("socket");
528
555
return -1;
529
556
}
530
557
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
558
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 ){
559
if(af == AF_INET6){
560
to.in6.sin6_family = (uint16_t)af;
561
ret = inet_pton(af, ip, &to.in6.sin6_addr);
562
} else { /* IPv4 */
563
to.in.sin_family = (sa_family_t)af;
564
ret = inet_pton(af, ip, &to.in.sin_addr);
565
}
566
if(ret < 0 ){
545
567
perror("inet_pton");
546
568
return -1;
547
569
}
549
571
fprintf(stderr, "Bad address: %s\n", ip);
550
572
return -1;
551
573
}
552
to.in6.sin6_port = htons(port); /* Spurious warning */
553
554
to.in6.sin6_scope_id = (uint32_t)if_index;
574
if(af == AF_INET6){
575
to.in6.sin6_port = htons(port); /* Spurious warnings from
576
-Wconversion and
577
-Wunreachable-code */
578
579
if(IN6_IS_ADDR_LINKLOCAL /* Spurious warnings from */
580
(&to.in6.sin6_addr)){ /* -Wstrict-aliasing=2 or lower and
581
-Wunreachable-code*/
582
if(if_index == AVAHI_IF_UNSPEC){
583
fprintf(stderr, "An IPv6 link-local address is incomplete"
584
" without a network interface\n");
585
return -1;
586
}
587
/* Set the network interface number as scope */
588
to.in6.sin6_scope_id = (uint32_t)if_index;
589
}
590
} else {
591
to.in.sin_port = htons(port); /* Spurious warnings from
592
-Wconversion and
593
-Wunreachable-code */
594
}
555
595
556
596
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){
597
if(af == AF_INET6 and if_index != AVAHI_IF_UNSPEC){
598
char interface[IF_NAMESIZE];
599
if(if_indextoname((unsigned int)if_index, interface) == NULL){
600
perror("if_indextoname");
601
} else {
602
fprintf(stderr, "Connection to: %s%%%s, port %" PRIu16 "\n",
603
ip, interface, port);
604
}
605
} else {
606
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
607
port);
608
}
609
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
610
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
611
const char *pcret;
612
if(af == AF_INET6){
613
pcret = inet_ntop(af, &(to.in6.sin6_addr), addrstr,
614
sizeof(addrstr));
615
} else {
616
pcret = inet_ntop(af, &(to.in.sin_addr), addrstr,
617
sizeof(addrstr));
618
}
619
if(pcret == NULL){
562
620
perror("inet_ntop");
563
621
} else {
564
622
if(strcmp(addrstr, ip) != 0){
567
625
}
568
626
}
569
627
570
ret = connect(tcp_sd, &to.in, sizeof(to));
571
if (ret < 0){
628
if(af == AF_INET6){
629
ret = connect(tcp_sd, &to.in6, sizeof(to));
630
} else {
631
ret = connect(tcp_sd, &to.in, sizeof(to)); /* IPv4 */
632
}
633
if(ret < 0){
572
634
perror("connect");
573
635
return -1;
574
636
}
575
637
576
638
const char *out = mandos_protocol_version;
577
639
written = 0;
578
while (true){
640
while(true){
579
641
size_t out_size = strlen(out);
580
ret = TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
642
ret = (int)TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
581
643
out_size - written));
582
if (ret == -1){
644
if(ret == -1){
583
645
perror("write");
584
646
retval = -1;
585
647
goto mandos_end;
588
650
if(written < out_size){
589
651
continue;
590
652
} else {
591
if (out == mandos_protocol_version){
653
if(out == mandos_protocol_version){
592
654
written = 0;
593
655
out = "\r\n";
594
656
} else {
601
663
fprintf(stderr, "Establishing TLS session with %s\n", ip);
602
664
}
603
665
604
gnutls_transport_set_ptr (session, (gnutls_transport_ptr_t) tcp_sd);
666
gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t) tcp_sd);
605
667
606
668
do{
607
ret = gnutls_handshake (session);
669
ret = gnutls_handshake(session);
608
670
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
609
671
610
if (ret != GNUTLS_E_SUCCESS){
672
if(ret != GNUTLS_E_SUCCESS){
611
673
if(debug){
612
674
fprintf(stderr, "*** GnuTLS Handshake failed ***\n");
613
gnutls_perror (ret);
675
gnutls_perror(ret);
614
676
}
615
677
retval = -1;
616
678
goto mandos_end;
619
681
/* Read OpenPGP packet that contains the wanted password */
620
682
621
683
if(debug){
622
fprintf(stderr, "Retrieving pgp encrypted password from %s\n",
684
fprintf(stderr, "Retrieving OpenPGP encrypted password from %s\n",
623
685
ip);
624
686
}
625
687
626
688
while(true){
627
buffer_capacity = adjustbuffer(&buffer, buffer_length,
689
buffer_capacity = incbuffer(&buffer, buffer_length,
628
690
buffer_capacity);
629
if (buffer_capacity == 0){
630
perror("adjustbuffer");
691
if(buffer_capacity == 0){
692
perror("incbuffer");
631
693
retval = -1;
632
694
goto mandos_end;
633
695
}
634
696
635
ret = gnutls_record_recv(session, buffer+buffer_length,
636
BUFFER_SIZE);
637
if (ret == 0){
697
sret = gnutls_record_recv(session, buffer+buffer_length,
698
BUFFER_SIZE);
699
if(sret == 0){
638
700
break;
639
701
}
640
if (ret < 0){
641
switch(ret){
702
if(sret < 0){
703
switch(sret){
642
704
case GNUTLS_E_INTERRUPTED:
643
705
case GNUTLS_E_AGAIN:
644
706
break;
645
707
case GNUTLS_E_REHANDSHAKE:
646
708
do{
647
ret = gnutls_handshake (session);
709
ret = gnutls_handshake(session);
648
710
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
649
if (ret < 0){
711
if(ret < 0){
650
712
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
651
gnutls_perror (ret);
713
gnutls_perror(ret);
652
714
retval = -1;
653
715
goto mandos_end;
654
716
}
657
719
fprintf(stderr, "Unknown error while reading data from"
658
720
" encrypted session with Mandos server\n");
659
721
retval = -1;
660
gnutls_bye (session, GNUTLS_SHUT_RDWR);
722
gnutls_bye(session, GNUTLS_SHUT_RDWR);
661
723
goto mandos_end;
662
724
}
663
725
} else {
664
buffer_length += (size_t) ret;
726
buffer_length += (size_t) sret;
665
727
}
666
728
}
667
729
669
731
fprintf(stderr, "Closing TLS session\n");
670
732
}
671
733
672
gnutls_bye (session, GNUTLS_SHUT_RDWR);
734
gnutls_bye(session, GNUTLS_SHUT_RDWR);
673
735
674
if (buffer_length > 0){
675
decrypted_buffer_size = pgp_packet_decrypt(mc, buffer,
736
if(buffer_length > 0){
737
decrypted_buffer_size = pgp_packet_decrypt(buffer,
676
738
buffer_length,
677
739
&decrypted_buffer);
678
if (decrypted_buffer_size >= 0){
740
if(decrypted_buffer_size >= 0){
679
741
written = 0;
680
742
while(written < (size_t) decrypted_buffer_size){
681
ret = (int)fwrite (decrypted_buffer + written, 1,
682
(size_t)decrypted_buffer_size - written,
683
stdout);
743
ret = (int)fwrite(decrypted_buffer + written, 1,
744
(size_t)decrypted_buffer_size - written,
745
stdout);
684
746
if(ret == 0 and ferror(stdout)){
685
747
if(debug){
686
748
fprintf(stderr, "Error writing encrypted data: %s\n",
703
765
704
766
mandos_end:
705
767
free(buffer);
706
ret = TEMP_FAILURE_RETRY(close(tcp_sd));
768
ret = (int)TEMP_FAILURE_RETRY(close(tcp_sd));
707
769
if(ret == -1){
708
770
perror("close");
709
771
}
710
gnutls_deinit (session);
772
gnutls_deinit(session);
711
773
return retval;
712
774
}
713
775
714
776
static void resolve_callback(AvahiSServiceResolver *r,
715
777
AvahiIfIndex interface,
716
AVAHI_GCC_UNUSED AvahiProtocol protocol,
778
AvahiProtocol proto,
717
779
AvahiResolverEvent event,
718
780
const char *name,
719
781
const char *type,
724
786
AVAHI_GCC_UNUSED AvahiStringList *txt,
725
787
AVAHI_GCC_UNUSED AvahiLookupResultFlags
726
788
flags,
727
void* userdata) {
728
mandos_context *mc = userdata;
789
__attribute__((unused)) void* userdata){
729
790
assert(r);
730
791
731
792
/* Called whenever a service has been resolved successfully or
732
793
timed out */
733
794
734
switch (event) {
795
switch(event){
735
796
default:
736
797
case AVAHI_RESOLVER_FAILURE:
737
798
fprintf(stderr, "(Avahi Resolver) Failed to resolve service '%s'"
738
799
" of type '%s' in domain '%s': %s\n", name, type, domain,
739
avahi_strerror(avahi_server_errno(mc->server)));
800
avahi_strerror(avahi_server_errno(mc.server)));
740
801
break;
741
802
742
803
case AVAHI_RESOLVER_FOUND:
745
806
avahi_address_snprint(ip, sizeof(ip), address);
746
807
if(debug){
747
808
fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %"
748
PRIu16 ") on port %d\n", name, host_name, ip,
749
interface, port);
809
PRIdMAX ") on port %" PRIu16 "\n", name, host_name,
810
ip, (intmax_t)interface, port);
750
811
}
751
int ret = start_mandos_communication(ip, port, interface, mc);
752
if (ret == 0){
753
avahi_simple_poll_quit(mc->simple_poll);
812
int ret = start_mandos_communication(ip, port, interface,
813
avahi_proto_to_af(proto));
814
if(ret == 0){
815
avahi_simple_poll_quit(mc.simple_poll);
754
816
}
755
817
}
756
818
}
757
819
avahi_s_service_resolver_free(r);
758
820
}
759
821
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;
822
static void browse_callback(AvahiSServiceBrowser *b,
823
AvahiIfIndex interface,
824
AvahiProtocol protocol,
825
AvahiBrowserEvent event,
826
const char *name,
827
const char *type,
828
const char *domain,
829
AVAHI_GCC_UNUSED AvahiLookupResultFlags
830
flags,
831
__attribute__((unused)) void* userdata){
771
832
assert(b);
772
833
773
834
/* Called whenever a new services becomes available on the LAN or
774
835
is removed from the LAN */
775
836
776
switch (event) {
837
switch(event){
777
838
default:
778
839
case AVAHI_BROWSER_FAILURE:
779
840
780
841
fprintf(stderr, "(Avahi browser) %s\n",
781
avahi_strerror(avahi_server_errno(mc->server)));
782
avahi_simple_poll_quit(mc->simple_poll);
842
avahi_strerror(avahi_server_errno(mc.server)));
843
avahi_simple_poll_quit(mc.simple_poll);
783
844
return;
784
845
785
846
case AVAHI_BROWSER_NEW:
788
849
the callback function is called the Avahi server will free the
789
850
resolver for us. */
790
851
791
if (!(avahi_s_service_resolver_new(mc->server, interface,
852
if(!(avahi_s_service_resolver_new(mc.server, interface,
792
853
protocol, name, type, domain,
793
854
AVAHI_PROTO_INET6, 0,
794
resolve_callback, mc)))
855
resolve_callback, NULL)))
795
856
fprintf(stderr, "Avahi: Failed to resolve service '%s': %s\n",
796
name, avahi_strerror(avahi_server_errno(mc->server)));
857
name, avahi_strerror(avahi_server_errno(mc.server)));
797
858
break;
798
859
799
860
case AVAHI_BROWSER_REMOVE:
808
869
}
809
870
}
810
871
872
static void handle_sigterm(__attribute__((unused)) int sig){
873
int old_errno = errno;
874
avahi_simple_poll_quit(mc.simple_poll);
875
errno = old_errno;
876
}
877
811
878
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);
879
AvahiSServiceBrowser *sb = NULL;
880
int error;
881
int ret;
882
intmax_t tmpmax;
883
int numchars;
884
int exitcode = EXIT_SUCCESS;
885
const char *interface = "eth0";
886
struct ifreq network;
887
int sd;
888
uid_t uid;
889
gid_t gid;
890
char *connect_to = NULL;
891
char tempdir[] = "/tmp/mandosXXXXXX";
892
bool tempdir_created = false;
893
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
894
const char *seckey = PATHDIR "/" SECKEY;
895
const char *pubkey = PATHDIR "/" PUBKEY;
896
897
bool gnutls_initialized = false;
898
bool gpgme_initialized = false;
899
double delay = 2.5;
900
901
struct sigaction old_sigterm_action;
902
struct sigaction sigterm_action = { .sa_handler = handle_sigterm };
903
904
/* Initialize mandos context */
905
mc = (mandos_context){ .simple_poll = NULL, .server = NULL,
906
.dh_bits = 1024, .priority = "SECURE256"
907
":!CTYPE-X.509:+CTYPE-OPENPGP" };
908
909
{
910
struct argp_option options[] = {
911
{ .name = "debug", .key = 128,
912
.doc = "Debug mode", .group = 3 },
913
{ .name = "connect", .key = 'c',
914
.arg = "ADDRESS:PORT",
915
.doc = "Connect directly to a specific Mandos server",
916
.group = 1 },
917
{ .name = "interface", .key = 'i',
918
.arg = "NAME",
919
.doc = "Network interface that will be used to search for"
920
" Mandos servers",
921
.group = 1 },
922
{ .name = "seckey", .key = 's',
923
.arg = "FILE",
924
.doc = "OpenPGP secret key file base name",
925
.group = 1 },
926
{ .name = "pubkey", .key = 'p',
927
.arg = "FILE",
928
.doc = "OpenPGP public key file base name",
929
.group = 2 },
930
{ .name = "dh-bits", .key = 129,
931
.arg = "BITS",
932
.doc = "Bit length of the prime number used in the"
933
" Diffie-Hellman key exchange",
934
.group = 2 },
935
{ .name = "priority", .key = 130,
936
.arg = "STRING",
937
.doc = "GnuTLS priority string for the TLS handshake",
938
.group = 1 },
939
{ .name = "delay", .key = 131,
940
.arg = "SECONDS",
941
.doc = "Maximum delay to wait for interface startup",
942
.group = 2 },
943
{ .name = NULL }
944
};
945
946
error_t parse_opt(int key, char *arg,
947
struct argp_state *state){
948
switch(key){
949
case 128: /* --debug */
950
debug = true;
951
break;
952
case 'c': /* --connect */
953
connect_to = arg;
954
break;
955
case 'i': /* --interface */
956
interface = arg;
957
break;
958
case 's': /* --seckey */
959
seckey = arg;
960
break;
961
case 'p': /* --pubkey */
962
pubkey = arg;
963
break;
964
case 129: /* --dh-bits */
965
ret = sscanf(arg, "%" SCNdMAX "%n", &tmpmax, &numchars);
966
if(ret < 1 or tmpmax != (typeof(mc.dh_bits))tmpmax
967
or arg[numchars] != '\0'){
968
fprintf(stderr, "Bad number of DH bits\n");
969
exit(EXIT_FAILURE);
970
}
971
mc.dh_bits = (typeof(mc.dh_bits))tmpmax;
972
break;
973
case 130: /* --priority */
974
mc.priority = arg;
975
break;
976
case 131: /* --delay */
977
ret = sscanf(arg, "%lf%n", &delay, &numchars);
978
if(ret < 1 or arg[numchars] != '\0'){
979
fprintf(stderr, "Bad delay\n");
980
exit(EXIT_FAILURE);
981
}
982
break;
983
case ARGP_KEY_ARG:
984
argp_usage(state);
985
case ARGP_KEY_END:
986
break;
987
default:
988
return ARGP_ERR_UNKNOWN;
989
}
990
return 0;
991
}
992
993
struct argp argp = { .options = options, .parser = parse_opt,
994
.args_doc = "",
995
.doc = "Mandos client -- Get and decrypt"
996
" passwords from a Mandos server" };
997
ret = argp_parse(&argp, argc, argv, 0, 0, NULL);
998
if(ret == ARGP_ERR_UNKNOWN){
999
fprintf(stderr, "Unknown error while parsing arguments\n");
1000
exitcode = EXIT_FAILURE;
1001
goto end;
1002
}
1003
}
1004
1005
/* If the interface is down, bring it up */
1006
if(interface[0] != '\0'){
1007
#ifdef __linux__
1008
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1009
messages to mess up the prompt */
1010
ret = klogctl(8, NULL, 5);
1011
bool restore_loglevel = true;
1012
if(ret == -1){
1013
restore_loglevel = false;
1014
perror("klogctl");
1015
}
1016
#endif
1017
1018
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1019
if(sd < 0){
1020
perror("socket");
1021
exitcode = EXIT_FAILURE;
1022
#ifdef __linux__
1023
if(restore_loglevel){
1024
ret = klogctl(7, NULL, 0);
1025
if(ret == -1){
1026
perror("klogctl");
1027
}
1028
}
1029
#endif
1030
goto end;
1031
}
1032
strcpy(network.ifr_name, interface);
1033
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1034
if(ret == -1){
1035
perror("ioctl SIOCGIFFLAGS");
1036
#ifdef __linux__
1037
if(restore_loglevel){
1038
ret = klogctl(7, NULL, 0);
1039
if(ret == -1){
1040
perror("klogctl");
1041
}
1042
}
1043
#endif
1044
exitcode = EXIT_FAILURE;
1045
goto end;
1046
}
1047
if((network.ifr_flags & IFF_UP) == 0){
1048
network.ifr_flags |= IFF_UP;
1049
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1050
if(ret == -1){
1051
perror("ioctl SIOCSIFFLAGS");
1052
exitcode = EXIT_FAILURE;
1053
#ifdef __linux__
1054
if(restore_loglevel){
1055
ret = klogctl(7, NULL, 0);
1056
if(ret == -1){
1057
perror("klogctl");
892
1058
}
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
1059
}
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;
1060
#endif
915
1061
goto end;
916
1062
}
917
1063
}
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);
1064
/* sleep checking until interface is running */
1065
for(int i=0; i < delay * 4; i++){
928
1066
ret = ioctl(sd, SIOCGIFFLAGS, &network);
929
1067
if(ret == -1){
930
1068
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));
1069
} else if(network.ifr_flags & IFF_RUNNING){
1070
break;
1071
}
1072
struct timespec sleeptime = { .tv_nsec = 250000000 };
1073
ret = nanosleep(&sleeptime, NULL);
1074
if(ret == -1 and errno != EINTR){
1075
perror("nanosleep");
1076
}
1077
}
1078
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1079
if(ret == -1){
1080
perror("close");
1081
}
1082
#ifdef __linux__
1083
if(restore_loglevel){
1084
/* Restores kernel loglevel to default */
1085
ret = klogctl(7, NULL, 0);
944
1086
if(ret == -1){
945
perror("close");
1087
perror("klogctl");
946
1088
}
947
1089
}
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
1090
#endif
1091
}
1092
1093
uid = getuid();
1094
gid = getgid();
1095
1096
errno = 0;
1097
setgid(gid);
1098
if(ret == -1){
1099
perror("setgid");
1100
}
1101
1102
ret = setuid(uid);
1103
if(ret == -1){
1104
perror("setuid");
1105
}
1106
1107
ret = init_gnutls_global(pubkey, seckey);
1108
if(ret == -1){
1109
fprintf(stderr, "init_gnutls_global failed\n");
1110
exitcode = EXIT_FAILURE;
1111
goto end;
1112
} else {
1113
gnutls_initialized = true;
1114
}
1115
1116
if(mkdtemp(tempdir) == NULL){
1117
perror("mkdtemp");
1118
goto end;
1119
}
1120
tempdir_created = true;
1121
1122
if(not init_gpgme(pubkey, seckey, tempdir)){
1123
fprintf(stderr, "init_gpgme failed\n");
1124
exitcode = EXIT_FAILURE;
1125
goto end;
1126
} else {
1127
gpgme_initialized = true;
1128
}
1129
1130
if(interface[0] != '\0'){
985
1131
if_index = (AvahiIfIndex) if_nametoindex(interface);
986
1132
if(if_index == 0){
987
1133
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
1134
exitcode = EXIT_FAILURE;
1135
goto end;
1136
}
1137
}
1138
1139
if(connect_to != NULL){
1140
/* Connect directly, do not use Zeroconf */
1141
/* (Mainly meant for debugging) */
1142
char *address = strrchr(connect_to, ':');
1143
if(address == NULL){
1144
fprintf(stderr, "No colon in address\n");
1145
exitcode = EXIT_FAILURE;
1146
goto end;
1147
}
1148
uint16_t port;
1149
ret = sscanf(address+1, "%" SCNdMAX "%n", &tmpmax, &numchars);
1150
if(ret < 1 or tmpmax != (uint16_t)tmpmax
1151
or address[numchars+1] != '\0'){
1152
fprintf(stderr, "Bad port number\n");
1153
exitcode = EXIT_FAILURE;
1154
goto end;
1155
}
1156
port = (uint16_t)tmpmax;
1157
*address = '\0';
1158
address = connect_to;
1159
/* Colon in address indicates IPv6 */
1160
int af;
1161
if(strchr(address, ':') != NULL){
1162
af = AF_INET6;
1163
} else {
1164
af = AF_INET;
1165
}
1166
ret = start_mandos_communication(address, port, if_index,
1167
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
1080
1250
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){
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){
1112
1283
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;
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;
1144
1321
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0