To get this branch, use:
bzr branch
http://bzr.recompile.se/loggerhead/mandos/trunk
« back to all changes in this revision
Viewing changes to plugins.d/mandos-client.c
- browse files at revision 356
- compare with another revision
- download diff
- download tarball
- view history from revision 356
- Committer: Teddy Hogeborn
- Date: 2009-09-04 16:32:22 UTC
- Revision ID: teddy@fukt.bsnet.se-20090904163222-l9wp25ng1e5ym0yq
* plugin-runner.c (main): When a plugin is killed by a signal, show
the signal name, not just the number, in the
debug log message.
* plugins.d/password-prompt.c (termination_handler): Store received
signal in
"signal_received".
(main): If exiting due to signal, re-raise signal received instead
of returning.
the signal name, not just the number, in the
debug log message.
* plugins.d/password-prompt.c (termination_handler): Store received
signal in
"signal_received".
(main): If exiting due to signal, re-raise signal received instead
of returning.
- files added:
- debian/watch
- 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
30
30
*/
31
31
32
32
/* Needed by GPGME, specifically gpgme_data_seek() */
33
#ifndef _LARGEFILE_SOURCE
33
34
#define _LARGEFILE_SOURCE
35
#endif
36
#ifndef _FILE_OFFSET_BITS
34
37
#define _FILE_OFFSET_BITS 64
38
#endif
35
39
36
40
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), asprintf() */
37
41
38
42
#include <stdio.h> /* fprintf(), stderr, fwrite(),
39
stdout, ferror() */
43
stdout, ferror(), remove() */
40
44
#include <stdint.h> /* uint16_t, uint32_t */
41
45
#include <stddef.h> /* NULL, size_t, ssize_t */
42
46
#include <stdlib.h> /* free(), EXIT_SUCCESS, EXIT_FAILURE,
43
srand() */
44
#include <stdbool.h> /* bool, true */
47
srand(), strtof() */
48
#include <stdbool.h> /* bool, false, true */
45
49
#include <string.h> /* memset(), strcmp(), strlen(),
46
50
strerror(), asprintf(), strcpy() */
47
#include <sys/ioctl.h> /* ioctl */
51
#include <sys/ioctl.h> /* ioctl */
48
52
#include <sys/types.h> /* socket(), inet_pton(), sockaddr,
49
53
sockaddr_in6, PF_INET6,
50
SOCK_STREAM, INET6_ADDRSTRLEN,
51
uid_t, gid_t, open(), opendir(), DIR */
54
SOCK_STREAM, uid_t, gid_t, open(),
55
opendir(), DIR */
52
56
#include <sys/stat.h> /* open() */
53
57
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
54
struct in6_addr, inet_pton(),
55
connect() */
58
inet_pton(), connect() */
56
59
#include <fcntl.h> /* open() */
57
#include <dirent.h> /* opendir(), struct dirent, readdir() */
58
#include <inttypes.h> /* PRIu16 */
60
#include <dirent.h> /* opendir(), struct dirent, readdir()
61
*/
62
#include <inttypes.h> /* PRIu16, PRIdMAX, intmax_t,
63
strtoimax() */
59
64
#include <assert.h> /* assert() */
60
65
#include <errno.h> /* perror(), errno */
61
#include <time.h> /* time() */
66
#include <time.h> /* nanosleep(), time() */
62
67
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
63
68
SIOCSIFFLAGS, if_indextoname(),
64
69
if_nametoindex(), IF_NAMESIZE */
65
#include <netinet/in.h>
70
#include <netinet/in.h> /* IN6_IS_ADDR_LINKLOCAL,
71
INET_ADDRSTRLEN, INET6_ADDRSTRLEN
72
*/
66
73
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
67
74
getuid(), getgid(), setuid(),
68
75
setgid() */
69
76
#include <arpa/inet.h> /* inet_pton(), htons */
70
#include <iso646.h> /* not, and */
77
#include <iso646.h> /* not, or, and */
71
78
#include <argp.h> /* struct argp_option, error_t, struct
72
79
argp_state, struct argp,
73
80
argp_parse(), ARGP_KEY_ARG,
74
81
ARGP_KEY_END, ARGP_ERR_UNKNOWN */
82
#include <signal.h> /* sigemptyset(), sigaddset(),
83
sigaction(), SIGTERM, sig_atomic_t,
84
raise() */
85
86
#ifdef __linux__
87
#include <sys/klog.h> /* klogctl() */
88
#endif /* __linux__ */
75
89
76
90
/* Avahi */
77
91
/* All Avahi types, constants and functions
90
104
gnutls_*
91
105
init_gnutls_session(),
92
106
GNUTLS_* */
93
#include <gnutls/openpgp.h> /* gnutls_certificate_set_openpgp_key_file(),
107
#include <gnutls/openpgp.h>
108
/* gnutls_certificate_set_openpgp_key_file(),
94
109
GNUTLS_OPENPGP_FMT_BASE64 */
95
110
96
111
/* GPGME */
122
137
gpgme_ctx_t ctx;
123
138
} mandos_context;
124
139
140
/* global context so signal handler can reach it*/
141
mandos_context mc = { .simple_poll = NULL, .server = NULL,
142
.dh_bits = 1024, .priority = "SECURE256"
143
":!CTYPE-X.509:+CTYPE-OPENPGP" };
144
125
145
/*
126
* Make room in "buffer" for at least BUFFER_SIZE additional bytes.
127
* "buffer_capacity" is how much is currently allocated,
146
* Make additional room in "buffer" for at least BUFFER_SIZE more
147
* bytes. "buffer_capacity" is how much is currently allocated,
128
148
* "buffer_length" is how much is already used.
129
149
*/
130
size_t adjustbuffer(char **buffer, size_t buffer_length,
150
size_t incbuffer(char **buffer, size_t buffer_length,
131
151
size_t buffer_capacity){
132
if (buffer_length + BUFFER_SIZE > buffer_capacity){
152
if(buffer_length + BUFFER_SIZE > buffer_capacity){
133
153
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
134
if (buffer == NULL){
154
if(buffer == NULL){
135
155
return 0;
136
156
}
137
157
buffer_capacity += BUFFER_SIZE;
142
162
/*
143
163
* Initialize GPGME.
144
164
*/
145
static bool init_gpgme(mandos_context *mc, const char *seckey,
165
static bool init_gpgme(const char *seckey,
146
166
const char *pubkey, const char *tempdir){
147
167
int ret;
148
168
gpgme_error_t rc;
150
170
151
171
152
172
/*
153
* Helper function to insert pub and seckey to the enigne keyring.
173
* Helper function to insert pub and seckey to the engine keyring.
154
174
*/
155
175
bool import_key(const char *filename){
156
176
int fd;
157
177
gpgme_data_t pgp_data;
158
178
159
fd = TEMP_FAILURE_RETRY(open(filename, O_RDONLY));
179
fd = (int)TEMP_FAILURE_RETRY(open(filename, O_RDONLY));
160
180
if(fd == -1){
161
181
perror("open");
162
182
return false;
163
183
}
164
184
165
185
rc = gpgme_data_new_from_fd(&pgp_data, fd);
166
if (rc != GPG_ERR_NO_ERROR){
186
if(rc != GPG_ERR_NO_ERROR){
167
187
fprintf(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
168
188
gpgme_strsource(rc), gpgme_strerror(rc));
169
189
return false;
170
190
}
171
191
172
rc = gpgme_op_import(mc->ctx, pgp_data);
173
if (rc != GPG_ERR_NO_ERROR){
192
rc = gpgme_op_import(mc.ctx, pgp_data);
193
if(rc != GPG_ERR_NO_ERROR){
174
194
fprintf(stderr, "bad gpgme_op_import: %s: %s\n",
175
195
gpgme_strsource(rc), gpgme_strerror(rc));
176
196
return false;
177
197
}
178
198
179
ret = TEMP_FAILURE_RETRY(close(fd));
199
ret = (int)TEMP_FAILURE_RETRY(close(fd));
180
200
if(ret == -1){
181
201
perror("close");
182
202
}
184
204
return true;
185
205
}
186
206
187
if (debug){
188
fprintf(stderr, "Initialize gpgme\n");
207
if(debug){
208
fprintf(stderr, "Initializing GPGME\n");
189
209
}
190
210
191
211
/* Init GPGME */
192
212
gpgme_check_version(NULL);
193
213
rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
194
if (rc != GPG_ERR_NO_ERROR){
214
if(rc != GPG_ERR_NO_ERROR){
195
215
fprintf(stderr, "bad gpgme_engine_check_version: %s: %s\n",
196
216
gpgme_strsource(rc), gpgme_strerror(rc));
197
217
return false;
198
218
}
199
219
200
220
/* Set GPGME home directory for the OpenPGP engine only */
201
rc = gpgme_get_engine_info (&engine_info);
202
if (rc != GPG_ERR_NO_ERROR){
221
rc = gpgme_get_engine_info(&engine_info);
222
if(rc != GPG_ERR_NO_ERROR){
203
223
fprintf(stderr, "bad gpgme_get_engine_info: %s: %s\n",
204
224
gpgme_strsource(rc), gpgme_strerror(rc));
205
225
return false;
218
238
}
219
239
220
240
/* Create new GPGME "context" */
221
rc = gpgme_new(&(mc->ctx));
222
if (rc != GPG_ERR_NO_ERROR){
241
rc = gpgme_new(&(mc.ctx));
242
if(rc != GPG_ERR_NO_ERROR){
223
243
fprintf(stderr, "bad gpgme_new: %s: %s\n",
224
244
gpgme_strsource(rc), gpgme_strerror(rc));
225
245
return false;
226
246
}
227
247
228
if (not import_key(pubkey) or not import_key(seckey)){
248
if(not import_key(pubkey) or not import_key(seckey)){
229
249
return false;
230
250
}
231
251
232
return true;
252
return true;
233
253
}
234
254
235
255
/*
236
256
* Decrypt OpenPGP data.
237
257
* Returns -1 on error
238
258
*/
239
static ssize_t pgp_packet_decrypt (const mandos_context *mc,
240
const char *cryptotext,
241
size_t crypto_size,
242
char **plaintext){
259
static ssize_t pgp_packet_decrypt(const char *cryptotext,
260
size_t crypto_size,
261
char **plaintext){
243
262
gpgme_data_t dh_crypto, dh_plain;
244
263
gpgme_error_t rc;
245
264
ssize_t ret;
246
265
size_t plaintext_capacity = 0;
247
266
ssize_t plaintext_length = 0;
248
267
249
if (debug){
268
if(debug){
250
269
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
251
270
}
252
271
253
272
/* Create new GPGME data buffer from memory cryptotext */
254
273
rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,
255
274
0);
256
if (rc != GPG_ERR_NO_ERROR){
275
if(rc != GPG_ERR_NO_ERROR){
257
276
fprintf(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
258
277
gpgme_strsource(rc), gpgme_strerror(rc));
259
278
return -1;
261
280
262
281
/* Create new empty GPGME data buffer for the plaintext */
263
282
rc = gpgme_data_new(&dh_plain);
264
if (rc != GPG_ERR_NO_ERROR){
283
if(rc != GPG_ERR_NO_ERROR){
265
284
fprintf(stderr, "bad gpgme_data_new: %s: %s\n",
266
285
gpgme_strsource(rc), gpgme_strerror(rc));
267
286
gpgme_data_release(dh_crypto);
270
289
271
290
/* Decrypt data from the cryptotext data buffer to the plaintext
272
291
data buffer */
273
rc = gpgme_op_decrypt(mc->ctx, dh_crypto, dh_plain);
274
if (rc != GPG_ERR_NO_ERROR){
292
rc = gpgme_op_decrypt(mc.ctx, dh_crypto, dh_plain);
293
if(rc != GPG_ERR_NO_ERROR){
275
294
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
276
295
gpgme_strsource(rc), gpgme_strerror(rc));
277
296
plaintext_length = -1;
278
if (debug){
297
if(debug){
279
298
gpgme_decrypt_result_t result;
280
result = gpgme_op_decrypt_result(mc->ctx);
281
if (result == NULL){
299
result = gpgme_op_decrypt_result(mc.ctx);
300
if(result == NULL){
282
301
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
283
302
} else {
284
303
fprintf(stderr, "Unsupported algorithm: %s\n",
290
309
}
291
310
gpgme_recipient_t recipient;
292
311
recipient = result->recipients;
293
if(recipient){
294
while(recipient != NULL){
295
fprintf(stderr, "Public key algorithm: %s\n",
296
gpgme_pubkey_algo_name(recipient->pubkey_algo));
297
fprintf(stderr, "Key ID: %s\n", recipient->keyid);
298
fprintf(stderr, "Secret key available: %s\n",
299
recipient->status == GPG_ERR_NO_SECKEY
300
? "No" : "Yes");
301
recipient = recipient->next;
302
}
312
while(recipient != NULL){
313
fprintf(stderr, "Public key algorithm: %s\n",
314
gpgme_pubkey_algo_name(recipient->pubkey_algo));
315
fprintf(stderr, "Key ID: %s\n", recipient->keyid);
316
fprintf(stderr, "Secret key available: %s\n",
317
recipient->status == GPG_ERR_NO_SECKEY
318
? "No" : "Yes");
319
recipient = recipient->next;
303
320
}
304
321
}
305
322
}
311
328
}
312
329
313
330
/* Seek back to the beginning of the GPGME plaintext data buffer */
314
if (gpgme_data_seek(dh_plain, (off_t) 0, SEEK_SET) == -1){
331
if(gpgme_data_seek(dh_plain, (off_t)0, SEEK_SET) == -1){
315
332
perror("gpgme_data_seek");
316
333
plaintext_length = -1;
317
334
goto decrypt_end;
319
336
320
337
*plaintext = NULL;
321
338
while(true){
322
plaintext_capacity = adjustbuffer(plaintext,
339
plaintext_capacity = incbuffer(plaintext,
323
340
(size_t)plaintext_length,
324
341
plaintext_capacity);
325
if (plaintext_capacity == 0){
326
perror("adjustbuffer");
342
if(plaintext_capacity == 0){
343
perror("incbuffer");
327
344
plaintext_length = -1;
328
345
goto decrypt_end;
329
346
}
331
348
ret = gpgme_data_read(dh_plain, *plaintext + plaintext_length,
332
349
BUFFER_SIZE);
333
350
/* Print the data, if any */
334
if (ret == 0){
351
if(ret == 0){
335
352
/* EOF */
336
353
break;
337
354
}
361
378
return plaintext_length;
362
379
}
363
380
364
static const char * safer_gnutls_strerror (int value) {
365
const char *ret = gnutls_strerror (value); /* Spurious warning */
366
if (ret == NULL)
381
static const char * safer_gnutls_strerror(int value){
382
const char *ret = gnutls_strerror(value); /* Spurious warning from
383
-Wunreachable-code */
384
if(ret == NULL)
367
385
ret = "(unknown)";
368
386
return ret;
369
387
}
374
392
fprintf(stderr, "GnuTLS: %s", string);
375
393
}
376
394
377
static int init_gnutls_global(mandos_context *mc,
378
const char *pubkeyfilename,
395
static int init_gnutls_global(const char *pubkeyfilename,
379
396
const char *seckeyfilename){
380
397
int ret;
381
398
384
401
}
385
402
386
403
ret = gnutls_global_init();
387
if (ret != GNUTLS_E_SUCCESS) {
388
fprintf (stderr, "GnuTLS global_init: %s\n",
389
safer_gnutls_strerror(ret));
404
if(ret != GNUTLS_E_SUCCESS){
405
fprintf(stderr, "GnuTLS global_init: %s\n",
406
safer_gnutls_strerror(ret));
390
407
return -1;
391
408
}
392
409
393
if (debug){
410
if(debug){
394
411
/* "Use a log level over 10 to enable all debugging options."
395
412
* - GnuTLS manual
396
413
*/
399
416
}
400
417
401
418
/* 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 ();
419
gnutls_certificate_allocate_credentials(&mc.cred);
420
if(ret != GNUTLS_E_SUCCESS){
421
fprintf(stderr, "GnuTLS memory error: %s\n", /* Spurious warning
422
from
423
-Wunreachable-code
424
*/
425
safer_gnutls_strerror(ret));
426
gnutls_global_deinit();
408
427
return -1;
409
428
}
410
429
415
434
}
416
435
417
436
ret = gnutls_certificate_set_openpgp_key_file
418
(mc->cred, pubkeyfilename, seckeyfilename,
437
(mc.cred, pubkeyfilename, seckeyfilename,
419
438
GNUTLS_OPENPGP_FMT_BASE64);
420
if (ret != GNUTLS_E_SUCCESS) {
439
if(ret != GNUTLS_E_SUCCESS){
421
440
fprintf(stderr,
422
441
"Error[%d] while reading the OpenPGP key pair ('%s',"
423
442
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
427
446
}
428
447
429
448
/* 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));
449
ret = gnutls_dh_params_init(&mc.dh_params);
450
if(ret != GNUTLS_E_SUCCESS){
451
fprintf(stderr, "Error in GnuTLS DH parameter initialization:"
452
" %s\n", safer_gnutls_strerror(ret));
434
453
goto globalfail;
435
454
}
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));
455
ret = gnutls_dh_params_generate2(mc.dh_params, mc.dh_bits);
456
if(ret != GNUTLS_E_SUCCESS){
457
fprintf(stderr, "Error in GnuTLS prime generation: %s\n",
458
safer_gnutls_strerror(ret));
440
459
goto globalfail;
441
460
}
442
461
443
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
462
gnutls_certificate_set_dh_params(mc.cred, mc.dh_params);
444
463
445
464
return 0;
446
465
447
466
globalfail:
448
467
449
gnutls_certificate_free_credentials(mc->cred);
468
gnutls_certificate_free_credentials(mc.cred);
450
469
gnutls_global_deinit();
451
gnutls_dh_params_deinit(mc->dh_params);
470
gnutls_dh_params_deinit(mc.dh_params);
452
471
return -1;
453
472
}
454
473
455
static int init_gnutls_session(mandos_context *mc,
456
gnutls_session_t *session){
474
static int init_gnutls_session(gnutls_session_t *session){
457
475
int ret;
458
476
/* GnuTLS session creation */
459
477
ret = gnutls_init(session, GNUTLS_SERVER);
460
if (ret != GNUTLS_E_SUCCESS){
478
if(ret != GNUTLS_E_SUCCESS){
461
479
fprintf(stderr, "Error in GnuTLS session initialization: %s\n",
462
480
safer_gnutls_strerror(ret));
463
481
}
464
482
465
483
{
466
484
const char *err;
467
ret = gnutls_priority_set_direct(*session, mc->priority, &err);
468
if (ret != GNUTLS_E_SUCCESS) {
485
ret = gnutls_priority_set_direct(*session, mc.priority, &err);
486
if(ret != GNUTLS_E_SUCCESS){
469
487
fprintf(stderr, "Syntax error at: %s\n", err);
470
488
fprintf(stderr, "GnuTLS error: %s\n",
471
489
safer_gnutls_strerror(ret));
472
gnutls_deinit (*session);
490
gnutls_deinit(*session);
473
491
return -1;
474
492
}
475
493
}
476
494
477
495
ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,
478
mc->cred);
479
if (ret != GNUTLS_E_SUCCESS) {
496
mc.cred);
497
if(ret != GNUTLS_E_SUCCESS){
480
498
fprintf(stderr, "Error setting GnuTLS credentials: %s\n",
481
499
safer_gnutls_strerror(ret));
482
gnutls_deinit (*session);
500
gnutls_deinit(*session);
483
501
return -1;
484
502
}
485
503
486
504
/* ignore client certificate if any. */
487
gnutls_certificate_server_set_request (*session,
488
GNUTLS_CERT_IGNORE);
505
gnutls_certificate_server_set_request(*session,
506
GNUTLS_CERT_IGNORE);
489
507
490
gnutls_dh_set_prime_bits (*session, mc->dh_bits);
508
gnutls_dh_set_prime_bits(*session, mc.dh_bits);
491
509
492
510
return 0;
493
511
}
496
514
static void empty_log(__attribute__((unused)) AvahiLogLevel level,
497
515
__attribute__((unused)) const char *txt){}
498
516
517
sig_atomic_t quit_now = 0;
518
int signal_received = 0;
519
499
520
/* Called when a Mandos server is found */
500
521
static int start_mandos_communication(const char *ip, uint16_t port,
501
522
AvahiIfIndex if_index,
502
mandos_context *mc){
523
int af){
503
524
int ret, tcp_sd;
504
union { struct sockaddr in; struct sockaddr_in6 in6; } to;
525
ssize_t sret;
526
union {
527
struct sockaddr_in in;
528
struct sockaddr_in6 in6;
529
} to;
505
530
char *buffer = NULL;
506
531
char *decrypted_buffer;
507
532
size_t buffer_length = 0;
509
534
ssize_t decrypted_buffer_size;
510
535
size_t written;
511
536
int retval = 0;
512
char interface[IF_NAMESIZE];
513
537
gnutls_session_t session;
514
515
ret = init_gnutls_session (mc, &session);
516
if (ret != 0){
538
int pf; /* Protocol family */
539
540
switch(af){
541
case AF_INET6:
542
pf = PF_INET6;
543
break;
544
case AF_INET:
545
pf = PF_INET;
546
break;
547
default:
548
fprintf(stderr, "Bad address family: %d\n", af);
549
return -1;
550
}
551
552
ret = init_gnutls_session(&session);
553
if(ret != 0){
517
554
return -1;
518
555
}
519
556
520
557
if(debug){
521
fprintf(stderr, "Setting up a tcp connection to %s, port %" PRIu16
558
fprintf(stderr, "Setting up a TCP connection to %s, port %" PRIu16
522
559
"\n", ip, port);
523
560
}
524
561
525
tcp_sd = socket(PF_INET6, SOCK_STREAM, 0);
526
if(tcp_sd < 0) {
562
tcp_sd = socket(pf, SOCK_STREAM, 0);
563
if(tcp_sd < 0){
527
564
perror("socket");
528
565
return -1;
529
566
}
530
567
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
568
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 ){
569
if(af == AF_INET6){
570
to.in6.sin6_family = (sa_family_t)af;
571
ret = inet_pton(af, ip, &to.in6.sin6_addr);
572
} else { /* IPv4 */
573
to.in.sin_family = (sa_family_t)af;
574
ret = inet_pton(af, ip, &to.in.sin_addr);
575
}
576
if(ret < 0 ){
545
577
perror("inet_pton");
546
578
return -1;
547
579
}
549
581
fprintf(stderr, "Bad address: %s\n", ip);
550
582
return -1;
551
583
}
552
to.in6.sin6_port = htons(port); /* Spurious warning */
553
554
to.in6.sin6_scope_id = (uint32_t)if_index;
584
if(af == AF_INET6){
585
to.in6.sin6_port = htons(port); /* Spurious warnings from
586
-Wconversion and
587
-Wunreachable-code */
588
589
if(IN6_IS_ADDR_LINKLOCAL /* Spurious warnings from */
590
(&to.in6.sin6_addr)){ /* -Wstrict-aliasing=2 or lower and
591
-Wunreachable-code*/
592
if(if_index == AVAHI_IF_UNSPEC){
593
fprintf(stderr, "An IPv6 link-local address is incomplete"
594
" without a network interface\n");
595
return -1;
596
}
597
/* Set the network interface number as scope */
598
to.in6.sin6_scope_id = (uint32_t)if_index;
599
}
600
} else {
601
to.in.sin_port = htons(port); /* Spurious warnings from
602
-Wconversion and
603
-Wunreachable-code */
604
}
555
605
556
606
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){
607
if(af == AF_INET6 and if_index != AVAHI_IF_UNSPEC){
608
char interface[IF_NAMESIZE];
609
if(if_indextoname((unsigned int)if_index, interface) == NULL){
610
perror("if_indextoname");
611
} else {
612
fprintf(stderr, "Connection to: %s%%%s, port %" PRIu16 "\n",
613
ip, interface, port);
614
}
615
} else {
616
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
617
port);
618
}
619
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
620
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
621
const char *pcret;
622
if(af == AF_INET6){
623
pcret = inet_ntop(af, &(to.in6.sin6_addr), addrstr,
624
sizeof(addrstr));
625
} else {
626
pcret = inet_ntop(af, &(to.in.sin_addr), addrstr,
627
sizeof(addrstr));
628
}
629
if(pcret == NULL){
562
630
perror("inet_ntop");
563
631
} else {
564
632
if(strcmp(addrstr, ip) != 0){
567
635
}
568
636
}
569
637
570
ret = connect(tcp_sd, &to.in, sizeof(to));
571
if (ret < 0){
638
if(af == AF_INET6){
639
ret = connect(tcp_sd, &to.in6, sizeof(to));
640
} else {
641
ret = connect(tcp_sd, &to.in, sizeof(to)); /* IPv4 */
642
}
643
if(ret < 0){
572
644
perror("connect");
573
645
return -1;
574
646
}
575
647
576
648
const char *out = mandos_protocol_version;
577
649
written = 0;
578
while (true){
650
while(true){
579
651
size_t out_size = strlen(out);
580
ret = TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
652
ret = (int)TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
581
653
out_size - written));
582
if (ret == -1){
654
if(ret == -1){
583
655
perror("write");
584
656
retval = -1;
585
657
goto mandos_end;
588
660
if(written < out_size){
589
661
continue;
590
662
} else {
591
if (out == mandos_protocol_version){
663
if(out == mandos_protocol_version){
592
664
written = 0;
593
665
out = "\r\n";
594
666
} else {
601
673
fprintf(stderr, "Establishing TLS session with %s\n", ip);
602
674
}
603
675
604
gnutls_transport_set_ptr (session, (gnutls_transport_ptr_t) tcp_sd);
676
gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t) tcp_sd);
605
677
606
678
do{
607
ret = gnutls_handshake (session);
679
ret = gnutls_handshake(session);
608
680
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
609
681
610
if (ret != GNUTLS_E_SUCCESS){
682
if(ret != GNUTLS_E_SUCCESS){
611
683
if(debug){
612
684
fprintf(stderr, "*** GnuTLS Handshake failed ***\n");
613
gnutls_perror (ret);
685
gnutls_perror(ret);
614
686
}
615
687
retval = -1;
616
688
goto mandos_end;
619
691
/* Read OpenPGP packet that contains the wanted password */
620
692
621
693
if(debug){
622
fprintf(stderr, "Retrieving pgp encrypted password from %s\n",
694
fprintf(stderr, "Retrieving OpenPGP encrypted password from %s\n",
623
695
ip);
624
696
}
625
697
626
698
while(true){
627
buffer_capacity = adjustbuffer(&buffer, buffer_length,
699
buffer_capacity = incbuffer(&buffer, buffer_length,
628
700
buffer_capacity);
629
if (buffer_capacity == 0){
630
perror("adjustbuffer");
701
if(buffer_capacity == 0){
702
perror("incbuffer");
631
703
retval = -1;
632
704
goto mandos_end;
633
705
}
634
706
635
ret = gnutls_record_recv(session, buffer+buffer_length,
636
BUFFER_SIZE);
637
if (ret == 0){
707
sret = gnutls_record_recv(session, buffer+buffer_length,
708
BUFFER_SIZE);
709
if(sret == 0){
638
710
break;
639
711
}
640
if (ret < 0){
641
switch(ret){
712
if(sret < 0){
713
switch(sret){
642
714
case GNUTLS_E_INTERRUPTED:
643
715
case GNUTLS_E_AGAIN:
644
716
break;
645
717
case GNUTLS_E_REHANDSHAKE:
646
718
do{
647
ret = gnutls_handshake (session);
719
ret = gnutls_handshake(session);
648
720
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
649
if (ret < 0){
721
if(ret < 0){
650
722
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
651
gnutls_perror (ret);
723
gnutls_perror(ret);
652
724
retval = -1;
653
725
goto mandos_end;
654
726
}
657
729
fprintf(stderr, "Unknown error while reading data from"
658
730
" encrypted session with Mandos server\n");
659
731
retval = -1;
660
gnutls_bye (session, GNUTLS_SHUT_RDWR);
732
gnutls_bye(session, GNUTLS_SHUT_RDWR);
661
733
goto mandos_end;
662
734
}
663
735
} else {
664
buffer_length += (size_t) ret;
736
buffer_length += (size_t) sret;
665
737
}
666
738
}
667
739
669
741
fprintf(stderr, "Closing TLS session\n");
670
742
}
671
743
672
gnutls_bye (session, GNUTLS_SHUT_RDWR);
744
gnutls_bye(session, GNUTLS_SHUT_RDWR);
673
745
674
if (buffer_length > 0){
675
decrypted_buffer_size = pgp_packet_decrypt(mc, buffer,
746
if(buffer_length > 0){
747
decrypted_buffer_size = pgp_packet_decrypt(buffer,
676
748
buffer_length,
677
749
&decrypted_buffer);
678
if (decrypted_buffer_size >= 0){
750
if(decrypted_buffer_size >= 0){
679
751
written = 0;
680
752
while(written < (size_t) decrypted_buffer_size){
681
ret = (int)fwrite (decrypted_buffer + written, 1,
682
(size_t)decrypted_buffer_size - written,
683
stdout);
753
ret = (int)fwrite(decrypted_buffer + written, 1,
754
(size_t)decrypted_buffer_size - written,
755
stdout);
684
756
if(ret == 0 and ferror(stdout)){
685
757
if(debug){
686
758
fprintf(stderr, "Error writing encrypted data: %s\n",
703
775
704
776
mandos_end:
705
777
free(buffer);
706
ret = TEMP_FAILURE_RETRY(close(tcp_sd));
778
ret = (int)TEMP_FAILURE_RETRY(close(tcp_sd));
707
779
if(ret == -1){
708
780
perror("close");
709
781
}
710
gnutls_deinit (session);
782
gnutls_deinit(session);
711
783
return retval;
712
784
}
713
785
714
786
static void resolve_callback(AvahiSServiceResolver *r,
715
787
AvahiIfIndex interface,
716
AVAHI_GCC_UNUSED AvahiProtocol protocol,
788
AvahiProtocol proto,
717
789
AvahiResolverEvent event,
718
790
const char *name,
719
791
const char *type,
724
796
AVAHI_GCC_UNUSED AvahiStringList *txt,
725
797
AVAHI_GCC_UNUSED AvahiLookupResultFlags
726
798
flags,
727
void* userdata) {
728
mandos_context *mc = userdata;
799
AVAHI_GCC_UNUSED void* userdata){
729
800
assert(r);
730
801
731
802
/* Called whenever a service has been resolved successfully or
732
803
timed out */
733
804
734
switch (event) {
805
if(quit_now){
806
return;
807
}
808
809
switch(event){
735
810
default:
736
811
case AVAHI_RESOLVER_FAILURE:
737
812
fprintf(stderr, "(Avahi Resolver) Failed to resolve service '%s'"
738
813
" of type '%s' in domain '%s': %s\n", name, type, domain,
739
avahi_strerror(avahi_server_errno(mc->server)));
814
avahi_strerror(avahi_server_errno(mc.server)));
740
815
break;
741
816
742
817
case AVAHI_RESOLVER_FOUND:
745
820
avahi_address_snprint(ip, sizeof(ip), address);
746
821
if(debug){
747
822
fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %"
748
PRIu16 ") on port %d\n", name, host_name, ip,
749
interface, port);
823
PRIdMAX ") on port %" PRIu16 "\n", name, host_name,
824
ip, (intmax_t)interface, port);
750
825
}
751
int ret = start_mandos_communication(ip, port, interface, mc);
752
if (ret == 0){
753
avahi_simple_poll_quit(mc->simple_poll);
826
int ret = start_mandos_communication(ip, port, interface,
827
avahi_proto_to_af(proto));
828
if(ret == 0){
829
avahi_simple_poll_quit(mc.simple_poll);
754
830
}
755
831
}
756
832
}
757
833
avahi_s_service_resolver_free(r);
758
834
}
759
835
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;
836
static void browse_callback(AvahiSServiceBrowser *b,
837
AvahiIfIndex interface,
838
AvahiProtocol protocol,
839
AvahiBrowserEvent event,
840
const char *name,
841
const char *type,
842
const char *domain,
843
AVAHI_GCC_UNUSED AvahiLookupResultFlags
844
flags,
845
AVAHI_GCC_UNUSED void* userdata){
771
846
assert(b);
772
847
773
848
/* Called whenever a new services becomes available on the LAN or
774
849
is removed from the LAN */
775
850
776
switch (event) {
851
switch(event){
777
852
default:
778
853
case AVAHI_BROWSER_FAILURE:
779
854
780
855
fprintf(stderr, "(Avahi browser) %s\n",
781
avahi_strerror(avahi_server_errno(mc->server)));
782
avahi_simple_poll_quit(mc->simple_poll);
856
avahi_strerror(avahi_server_errno(mc.server)));
857
avahi_simple_poll_quit(mc.simple_poll);
783
858
return;
784
859
785
860
case AVAHI_BROWSER_NEW:
788
863
the callback function is called the Avahi server will free the
789
864
resolver for us. */
790
865
791
if (!(avahi_s_service_resolver_new(mc->server, interface,
792
protocol, name, type, domain,
793
AVAHI_PROTO_INET6, 0,
794
resolve_callback, mc)))
866
if(avahi_s_service_resolver_new(mc.server, interface, protocol,
867
name, type, domain, protocol, 0,
868
resolve_callback, NULL) == NULL)
795
869
fprintf(stderr, "Avahi: Failed to resolve service '%s': %s\n",
796
name, avahi_strerror(avahi_server_errno(mc->server)));
870
name, avahi_strerror(avahi_server_errno(mc.server)));
797
871
break;
798
872
799
873
case AVAHI_BROWSER_REMOVE:
808
882
}
809
883
}
810
884
885
/* stop main loop after sigterm has been called */
886
static void handle_sigterm(int sig){
887
if(quit_now){
888
return;
889
}
890
quit_now = 1;
891
signal_received = sig;
892
int old_errno = errno;
893
if(mc.simple_poll != NULL){
894
avahi_simple_poll_quit(mc.simple_poll);
895
}
896
errno = old_errno;
897
}
898
811
899
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);
900
AvahiSServiceBrowser *sb = NULL;
901
int error;
902
int ret;
903
intmax_t tmpmax;
904
char *tmp;
905
int exitcode = EXIT_SUCCESS;
906
const char *interface = "eth0";
907
struct ifreq network;
908
int sd = -1;
909
bool take_down_interface = false;
910
uid_t uid;
911
gid_t gid;
912
char *connect_to = NULL;
913
char tempdir[] = "/tmp/mandosXXXXXX";
914
bool tempdir_created = false;
915
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
916
const char *seckey = PATHDIR "/" SECKEY;
917
const char *pubkey = PATHDIR "/" PUBKEY;
918
919
bool gnutls_initialized = false;
920
bool gpgme_initialized = false;
921
float delay = 2.5f;
922
923
struct sigaction old_sigterm_action;
924
struct sigaction sigterm_action = { .sa_handler = handle_sigterm };
925
926
{
927
struct argp_option options[] = {
928
{ .name = "debug", .key = 128,
929
.doc = "Debug mode", .group = 3 },
930
{ .name = "connect", .key = 'c',
931
.arg = "ADDRESS:PORT",
932
.doc = "Connect directly to a specific Mandos server",
933
.group = 1 },
934
{ .name = "interface", .key = 'i',
935
.arg = "NAME",
936
.doc = "Network interface that will be used to search for"
937
" Mandos servers",
938
.group = 1 },
939
{ .name = "seckey", .key = 's',
940
.arg = "FILE",
941
.doc = "OpenPGP secret key file base name",
942
.group = 1 },
943
{ .name = "pubkey", .key = 'p',
944
.arg = "FILE",
945
.doc = "OpenPGP public key file base name",
946
.group = 2 },
947
{ .name = "dh-bits", .key = 129,
948
.arg = "BITS",
949
.doc = "Bit length of the prime number used in the"
950
" Diffie-Hellman key exchange",
951
.group = 2 },
952
{ .name = "priority", .key = 130,
953
.arg = "STRING",
954
.doc = "GnuTLS priority string for the TLS handshake",
955
.group = 1 },
956
{ .name = "delay", .key = 131,
957
.arg = "SECONDS",
958
.doc = "Maximum delay to wait for interface startup",
959
.group = 2 },
960
{ .name = NULL }
961
};
962
963
error_t parse_opt(int key, char *arg,
964
struct argp_state *state){
965
switch(key){
966
case 128: /* --debug */
967
debug = true;
968
break;
969
case 'c': /* --connect */
970
connect_to = arg;
971
break;
972
case 'i': /* --interface */
973
interface = arg;
974
break;
975
case 's': /* --seckey */
976
seckey = arg;
977
break;
978
case 'p': /* --pubkey */
979
pubkey = arg;
980
break;
981
case 129: /* --dh-bits */
982
errno = 0;
983
tmpmax = strtoimax(arg, &tmp, 10);
984
if(errno != 0 or tmp == arg or *tmp != '\0'
985
or tmpmax != (typeof(mc.dh_bits))tmpmax){
986
fprintf(stderr, "Bad number of DH bits\n");
987
exit(EXIT_FAILURE);
988
}
989
mc.dh_bits = (typeof(mc.dh_bits))tmpmax;
990
break;
991
case 130: /* --priority */
992
mc.priority = arg;
993
break;
994
case 131: /* --delay */
995
errno = 0;
996
delay = strtof(arg, &tmp);
997
if(errno != 0 or tmp == arg or *tmp != '\0'){
998
fprintf(stderr, "Bad delay\n");
999
exit(EXIT_FAILURE);
1000
}
1001
break;
1002
case ARGP_KEY_ARG:
1003
argp_usage(state);
1004
case ARGP_KEY_END:
1005
break;
1006
default:
1007
return ARGP_ERR_UNKNOWN;
1008
}
1009
return 0;
1010
}
1011
1012
struct argp argp = { .options = options, .parser = parse_opt,
1013
.args_doc = "",
1014
.doc = "Mandos client -- Get and decrypt"
1015
" passwords from a Mandos server" };
1016
ret = argp_parse(&argp, argc, argv, 0, 0, NULL);
1017
if(ret == ARGP_ERR_UNKNOWN){
1018
fprintf(stderr, "Unknown error while parsing arguments\n");
1019
exitcode = EXIT_FAILURE;
1020
goto end;
1021
}
1022
}
1023
1024
if(not debug){
1025
avahi_set_log_function(empty_log);
1026
}
1027
1028
/* Initialize Avahi early so avahi_simple_poll_quit() can be called
1029
from the signal handler */
1030
/* Initialize the pseudo-RNG for Avahi */
1031
srand((unsigned int) time(NULL));
1032
mc.simple_poll = avahi_simple_poll_new();
1033
if(mc.simple_poll == NULL){
1034
fprintf(stderr, "Avahi: Failed to create simple poll object.\n");
1035
exitcode = EXIT_FAILURE;
1036
goto end;
1037
}
1038
1039
sigemptyset(&sigterm_action.sa_mask);
1040
ret = sigaddset(&sigterm_action.sa_mask, SIGINT);
1041
if(ret == -1){
1042
perror("sigaddset");
1043
exitcode = EXIT_FAILURE;
1044
goto end;
1045
}
1046
ret = sigaddset(&sigterm_action.sa_mask, SIGHUP);
1047
if(ret == -1){
1048
perror("sigaddset");
1049
exitcode = EXIT_FAILURE;
1050
goto end;
1051
}
1052
ret = sigaddset(&sigterm_action.sa_mask, SIGTERM);
1053
if(ret == -1){
1054
perror("sigaddset");
1055
exitcode = EXIT_FAILURE;
1056
goto end;
1057
}
1058
ret = sigaction(SIGINT, &sigterm_action, &old_sigterm_action);
1059
if(ret == -1){
1060
perror("sigaction");
1061
exitcode = EXIT_FAILURE;
1062
goto end;
1063
}
1064
ret = sigaction(SIGHUP, &sigterm_action, NULL);
1065
if(ret == -1){
1066
perror("sigaction");
1067
exitcode = EXIT_FAILURE;
1068
goto end;
1069
}
1070
ret = sigaction(SIGTERM, &sigterm_action, NULL);
1071
if(ret == -1){
1072
perror("sigaction");
1073
exitcode = EXIT_FAILURE;
1074
goto end;
1075
}
1076
1077
/* If the interface is down, bring it up */
1078
if(interface[0] != '\0'){
1079
if_index = (AvahiIfIndex) if_nametoindex(interface);
1080
if(if_index == 0){
1081
fprintf(stderr, "No such interface: \"%s\"\n", interface);
1082
exitcode = EXIT_FAILURE;
1083
goto end;
1084
}
1085
1086
if(quit_now){
1087
goto end;
1088
}
1089
1090
#ifdef __linux__
1091
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1092
messages to mess up the prompt */
1093
ret = klogctl(8, NULL, 5);
1094
bool restore_loglevel = true;
1095
if(ret == -1){
1096
restore_loglevel = false;
1097
perror("klogctl");
1098
}
1099
#endif /* __linux__ */
1100
1101
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1102
if(sd < 0){
1103
perror("socket");
1104
exitcode = EXIT_FAILURE;
1105
#ifdef __linux__
1106
if(restore_loglevel){
1107
ret = klogctl(7, NULL, 0);
1108
if(ret == -1){
1109
perror("klogctl");
1110
}
1111
}
1112
#endif /* __linux__ */
1113
goto end;
1114
}
1115
strcpy(network.ifr_name, interface);
1116
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1117
if(ret == -1){
1118
perror("ioctl SIOCGIFFLAGS");
1119
#ifdef __linux__
1120
if(restore_loglevel){
1121
ret = klogctl(7, NULL, 0);
1122
if(ret == -1){
1123
perror("klogctl");
1124
}
1125
}
1126
#endif /* __linux__ */
1127
exitcode = EXIT_FAILURE;
1128
goto end;
1129
}
1130
if((network.ifr_flags & IFF_UP) == 0){
1131
network.ifr_flags |= IFF_UP;
1132
take_down_interface = true;
1133
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1134
if(ret == -1){
1135
take_down_interface = false;
1136
perror("ioctl SIOCSIFFLAGS");
1137
exitcode = EXIT_FAILURE;
1138
#ifdef __linux__
1139
if(restore_loglevel){
1140
ret = klogctl(7, NULL, 0);
1141
if(ret == -1){
1142
perror("klogctl");
892
1143
}
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
1144
}
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;
1145
#endif /* __linux__ */
915
1146
goto end;
916
1147
}
917
1148
}
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);
1149
/* sleep checking until interface is running */
1150
for(int i=0; i < delay * 4; i++){
928
1151
ret = ioctl(sd, SIOCGIFFLAGS, &network);
929
1152
if(ret == -1){
930
1153
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));
1154
} else if(network.ifr_flags & IFF_RUNNING){
1155
break;
1156
}
1157
struct timespec sleeptime = { .tv_nsec = 250000000 };
1158
ret = nanosleep(&sleeptime, NULL);
1159
if(ret == -1 and errno != EINTR){
1160
perror("nanosleep");
1161
}
1162
}
1163
if(not take_down_interface){
1164
/* We won't need the socket anymore */
1165
ret = (int)TEMP_FAILURE_RETRY(close(sd));
944
1166
if(ret == -1){
945
1167
perror("close");
946
1168
}
947
1169
}
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
985
if_index = (AvahiIfIndex) if_nametoindex(interface);
986
if(if_index == 0){
987
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
1170
#ifdef __linux__
1171
if(restore_loglevel){
1172
/* Restores kernel loglevel to default */
1173
ret = klogctl(7, NULL, 0);
1174
if(ret == -1){
1175
perror("klogctl");
1176
}
1177
}
1178
#endif /* __linux__ */
1179
}
1180
1181
if(quit_now){
1182
goto end;
1183
}
1184
1185
uid = getuid();
1186
gid = getgid();
1187
1188
errno = 0;
1189
setgid(gid);
1190
if(ret == -1){
1191
perror("setgid");
1192
}
1193
1194
ret = setuid(uid);
1195
if(ret == -1){
1196
perror("setuid");
1197
}
1198
1199
if(quit_now){
1200
goto end;
1201
}
1202
1203
ret = init_gnutls_global(pubkey, seckey);
1204
if(ret == -1){
1205
fprintf(stderr, "init_gnutls_global failed\n");
1206
exitcode = EXIT_FAILURE;
1207
goto end;
1208
} else {
1209
gnutls_initialized = true;
1210
}
1211
1212
if(quit_now){
1213
goto end;
1214
}
1215
1216
tempdir_created = true;
1217
if(mkdtemp(tempdir) == NULL){
1218
tempdir_created = false;
1219
perror("mkdtemp");
1220
goto end;
1221
}
1222
1223
if(quit_now){
1224
goto end;
1225
}
1226
1227
if(not init_gpgme(pubkey, seckey, tempdir)){
1228
fprintf(stderr, "init_gpgme failed\n");
1229
exitcode = EXIT_FAILURE;
1230
goto end;
1231
} else {
1232
gpgme_initialized = true;
1233
}
1234
1235
if(quit_now){
1236
goto end;
1237
}
1238
1239
if(connect_to != NULL){
1240
/* Connect directly, do not use Zeroconf */
1241
/* (Mainly meant for debugging) */
1242
char *address = strrchr(connect_to, ':');
1243
if(address == NULL){
1244
fprintf(stderr, "No colon in address\n");
1245
exitcode = EXIT_FAILURE;
1246
goto end;
1247
}
1248
1249
if(quit_now){
1250
goto end;
1251
}
1252
1253
uint16_t port;
1254
errno = 0;
1255
tmpmax = strtoimax(address+1, &tmp, 10);
1256
if(errno != 0 or tmp == address+1 or *tmp != '\0'
1257
or tmpmax != (uint16_t)tmpmax){
1258
fprintf(stderr, "Bad port number\n");
1259
exitcode = EXIT_FAILURE;
1260
goto end;
1261
}
1262
1263
if(quit_now){
1264
goto end;
1265
}
1266
1267
port = (uint16_t)tmpmax;
1268
*address = '\0';
1269
address = connect_to;
1270
/* Colon in address indicates IPv6 */
1271
int af;
1272
if(strchr(address, ':') != NULL){
1273
af = AF_INET6;
1274
} else {
1275
af = AF_INET;
1276
}
1277
1278
if(quit_now){
1279
goto end;
1280
}
1281
1282
ret = start_mandos_communication(address, port, if_index, af);
1283
if(ret < 0){
1284
exitcode = EXIT_FAILURE;
1285
} else {
1286
exitcode = EXIT_SUCCESS;
1287
}
1288
goto end;
1289
}
1290
1291
if(quit_now){
1292
goto end;
1293
}
1294
1295
{
1296
AvahiServerConfig config;
1297
/* Do not publish any local Zeroconf records */
1298
avahi_server_config_init(&config);
1299
config.publish_hinfo = 0;
1300
config.publish_addresses = 0;
1301
config.publish_workstation = 0;
1302
config.publish_domain = 0;
1303
1304
/* Allocate a new server */
1305
mc.server = avahi_server_new(avahi_simple_poll_get
1306
(mc.simple_poll), &config, NULL,
1307
NULL, &error);
1308
1309
/* Free the Avahi configuration data */
1310
avahi_server_config_free(&config);
1311
}
1312
1313
/* Check if creating the Avahi server object succeeded */
1314
if(mc.server == NULL){
1315
fprintf(stderr, "Failed to create Avahi server: %s\n",
1316
avahi_strerror(error));
1317
exitcode = EXIT_FAILURE;
1318
goto end;
1319
}
1320
1321
if(quit_now){
1322
goto end;
1323
}
1324
1325
/* Create the Avahi service browser */
1326
sb = avahi_s_service_browser_new(mc.server, if_index,
1327
AVAHI_PROTO_UNSPEC, "_mandos._tcp",
1328
NULL, 0, browse_callback, NULL);
1329
if(sb == NULL){
1330
fprintf(stderr, "Failed to create service browser: %s\n",
1331
avahi_strerror(avahi_server_errno(mc.server)));
1332
exitcode = EXIT_FAILURE;
1333
goto end;
1334
}
1335
1336
if(quit_now){
1337
goto end;
1338
}
1339
1340
/* Run the main loop */
1341
1342
if(debug){
1343
fprintf(stderr, "Starting Avahi loop search\n");
1344
}
1345
1346
avahi_simple_poll_loop(mc.simple_poll);
1347
1080
1348
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){
1349
1350
if(debug){
1351
fprintf(stderr, "%s exiting\n", argv[0]);
1352
}
1353
1354
/* Cleanup things */
1355
if(sb != NULL)
1356
avahi_s_service_browser_free(sb);
1357
1358
if(mc.server != NULL)
1359
avahi_server_free(mc.server);
1360
1361
if(mc.simple_poll != NULL)
1362
avahi_simple_poll_free(mc.simple_poll);
1363
1364
if(gnutls_initialized){
1365
gnutls_certificate_free_credentials(mc.cred);
1366
gnutls_global_deinit();
1367
gnutls_dh_params_deinit(mc.dh_params);
1368
}
1369
1370
if(gpgme_initialized){
1371
gpgme_release(mc.ctx);
1372
}
1373
1374
/* Take down the network interface */
1375
if(take_down_interface){
1376
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1377
if(ret == -1){
1378
perror("ioctl SIOCGIFFLAGS");
1379
} else if(network.ifr_flags & IFF_UP) {
1380
network.ifr_flags &= ~IFF_UP; /* clear flag */
1381
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1382
if(ret == -1){
1383
perror("ioctl SIOCSIFFLAGS");
1384
}
1385
}
1386
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1387
if(ret == -1){
1388
perror("close");
1389
}
1390
}
1391
1392
/* Removes the temp directory used by GPGME */
1393
if(tempdir_created){
1394
DIR *d;
1395
struct dirent *direntry;
1396
d = opendir(tempdir);
1397
if(d == NULL){
1398
if(errno != ENOENT){
1112
1399
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;
1400
}
1401
} else {
1402
while(true){
1403
direntry = readdir(d);
1404
if(direntry == NULL){
1405
break;
1406
}
1407
/* Skip "." and ".." */
1408
if(direntry->d_name[0] == '.'
1409
and (direntry->d_name[1] == '\0'
1410
or (direntry->d_name[1] == '.'
1411
and direntry->d_name[2] == '\0'))){
1412
continue;
1413
}
1414
char *fullname = NULL;
1415
ret = asprintf(&fullname, "%s/%s", tempdir,
1416
direntry->d_name);
1417
if(ret < 0){
1418
perror("asprintf");
1419
continue;
1420
}
1421
ret = remove(fullname);
1422
if(ret == -1){
1423
fprintf(stderr, "remove(\"%s\"): %s\n", fullname,
1424
strerror(errno));
1425
}
1426
free(fullname);
1427
}
1428
closedir(d);
1429
}
1430
ret = rmdir(tempdir);
1431
if(ret == -1 and errno != ENOENT){
1432
perror("rmdir");
1433
}
1434
}
1435
1436
if(quit_now){
1437
ret = sigaction(signal_received, &old_sigterm_action, NULL);
1438
if(ret == -1){
1439
perror("sigaction");
1440
}
1441
raise(signal_received);
1442
}
1443
1444
return exitcode;
1144
1445
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0