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- Committer: Teddy Hogeborn
- Date: 2008-10-03 09:32:30 UTC
- Revision ID: teddy@fukt.bsnet.se-20081003093230-rshn19e0c19zz12i
* .bzrignore (plugins.d/askpass-fifo): Added.
* Makefile (FORTIFY): Added "-fstack-protector-all".
(mandos, mandos-keygen): Use more strict regexps when updating the
version number.
* mandos (Client.__init__): Use os.path.expandvars() and
os.path.expanduser() on the "secfile"
config value.
* plugins.d/splashy.c: Update comments and order of #include's.
(main): Check user and group when looking for running splashy
process. Do not ignore ENOENT from execl(). Use _exit()
instead of "return" when an error happens in child
processes. Bug fix: Only wait for splashy_update
completion if it was started. Bug fix: detect failing
waitpid(). Only kill splashy_update if it is running. Do
the killing of the old splashy process before the fork().
Do setsid() and setuid(geteuid()) before starting the new
splashy. Report failing execl().
* plugins.d/usplash.c: Update comments and order of #include's.
(main): Check user and group when looking for running usplash
process. Do not report execv() error if interrupted by a
signal.
* Makefile (FORTIFY): Added "-fstack-protector-all".
(mandos, mandos-keygen): Use more strict regexps when updating the
version number.
* mandos (Client.__init__): Use os.path.expandvars() and
os.path.expanduser() on the "secfile"
config value.
* plugins.d/splashy.c: Update comments and order of #include's.
(main): Check user and group when looking for running splashy
process. Do not ignore ENOENT from execl(). Use _exit()
instead of "return" when an error happens in child
processes. Bug fix: Only wait for splashy_update
completion if it was started. Bug fix: detect failing
waitpid(). Only kill splashy_update if it is running. Do
the killing of the old splashy process before the fork().
Do setsid() and setuid(geteuid()) before starting the new
splashy. Report failing execl().
* plugins.d/usplash.c: Update comments and order of #include's.
(main): Check user and group when looking for running usplash
process. Do not report execv() error if interrupted by a
signal.
- files added:
- debian/mandos-client.config
- files removed:
- NEWS
- 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 © 2008,2009 Teddy Hogeborn
13
* Copyright © 2008,2009 Björn Påhlsson
12
* Copyright © 2008 Teddy Hogeborn & Björn Påhlsson
14
13
*
15
14
* This program is free software: you can redistribute it and/or
16
15
* modify it under the terms of the GNU General Public License as
36
35
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), asprintf() */
37
36
38
37
#include <stdio.h> /* fprintf(), stderr, fwrite(),
39
stdout, ferror(), sscanf(),
40
remove() */
38
stdout, ferror() */
41
39
#include <stdint.h> /* uint16_t, uint32_t */
42
40
#include <stddef.h> /* NULL, size_t, ssize_t */
43
41
#include <stdlib.h> /* free(), EXIT_SUCCESS, EXIT_FAILURE,
44
42
srand() */
45
#include <stdbool.h> /* bool, false, true */
43
#include <stdbool.h> /* bool, true */
46
44
#include <string.h> /* memset(), strcmp(), strlen(),
47
45
strerror(), asprintf(), strcpy() */
48
#include <sys/ioctl.h> /* ioctl */
46
#include <sys/ioctl.h> /* ioctl */
49
47
#include <sys/types.h> /* socket(), inet_pton(), sockaddr,
50
48
sockaddr_in6, PF_INET6,
51
SOCK_STREAM, uid_t, gid_t, open(),
52
opendir(), DIR */
49
SOCK_STREAM, INET6_ADDRSTRLEN,
50
uid_t, gid_t, open(), opendir(), DIR */
53
51
#include <sys/stat.h> /* open() */
54
52
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
55
inet_pton(), connect() */
53
struct in6_addr, inet_pton(),
54
connect() */
56
55
#include <fcntl.h> /* open() */
57
#include <dirent.h> /* opendir(), struct dirent, readdir()
58
*/
59
#include <inttypes.h> /* PRIu16, intmax_t, SCNdMAX */
56
#include <dirent.h> /* opendir(), struct dirent, readdir() */
57
#include <inttypes.h> /* PRIu16 */
60
58
#include <assert.h> /* assert() */
61
59
#include <errno.h> /* perror(), errno */
62
#include <time.h> /* nanosleep(), time() */
60
#include <time.h> /* time() */
63
61
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
64
62
SIOCSIFFLAGS, if_indextoname(),
65
63
if_nametoindex(), IF_NAMESIZE */
66
#include <netinet/in.h> /* IN6_IS_ADDR_LINKLOCAL,
67
INET_ADDRSTRLEN, INET6_ADDRSTRLEN
68
*/
64
#include <netinet/in.h>
69
65
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
70
66
getuid(), getgid(), setuid(),
71
67
setgid() */
72
68
#include <arpa/inet.h> /* inet_pton(), htons */
73
#include <iso646.h> /* not, or, and */
69
#include <iso646.h> /* not, and */
74
70
#include <argp.h> /* struct argp_option, error_t, struct
75
71
argp_state, struct argp,
76
72
argp_parse(), ARGP_KEY_ARG,
77
73
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
82
74
83
75
/* Avahi */
84
76
/* All Avahi types, constants and functions
97
89
gnutls_*
98
90
init_gnutls_session(),
99
91
GNUTLS_* */
100
#include <gnutls/openpgp.h>
101
/* gnutls_certificate_set_openpgp_key_file(),
92
#include <gnutls/openpgp.h> /* gnutls_certificate_set_openpgp_key_file(),
102
93
GNUTLS_OPENPGP_FMT_BASE64 */
103
94
104
95
/* GPGME */
130
121
gpgme_ctx_t ctx;
131
122
} mandos_context;
132
123
133
/* global context so signal handler can reach it*/
134
mandos_context mc;
135
136
124
/*
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.
125
* Make room in "buffer" for at least BUFFER_SIZE additional bytes.
126
* "buffer_capacity" is how much is currently allocated,
127
* "buffer_length" is how much is already used.
140
128
*/
141
size_t incbuffer(char **buffer, size_t buffer_length,
129
size_t adjustbuffer(char **buffer, size_t buffer_length,
142
130
size_t buffer_capacity){
143
if(buffer_length + BUFFER_SIZE > buffer_capacity){
131
if (buffer_length + BUFFER_SIZE > buffer_capacity){
144
132
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
145
if(buffer == NULL){
133
if (buffer == NULL){
146
134
return 0;
147
135
}
148
136
buffer_capacity += BUFFER_SIZE;
153
141
/*
154
142
* Initialize GPGME.
155
143
*/
156
static bool init_gpgme(const char *seckey,
144
static bool init_gpgme(mandos_context *mc, const char *seckey,
157
145
const char *pubkey, const char *tempdir){
158
146
int ret;
159
147
gpgme_error_t rc;
161
149
162
150
163
151
/*
164
* Helper function to insert pub and seckey to the engine keyring.
152
* Helper function to insert pub and seckey to the enigne keyring.
165
153
*/
166
154
bool import_key(const char *filename){
167
155
int fd;
168
156
gpgme_data_t pgp_data;
169
157
170
fd = (int)TEMP_FAILURE_RETRY(open(filename, O_RDONLY));
158
fd = TEMP_FAILURE_RETRY(open(filename, O_RDONLY));
171
159
if(fd == -1){
172
160
perror("open");
173
161
return false;
174
162
}
175
163
176
164
rc = gpgme_data_new_from_fd(&pgp_data, fd);
177
if(rc != GPG_ERR_NO_ERROR){
165
if (rc != GPG_ERR_NO_ERROR){
178
166
fprintf(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
179
167
gpgme_strsource(rc), gpgme_strerror(rc));
180
168
return false;
181
169
}
182
170
183
rc = gpgme_op_import(mc.ctx, pgp_data);
184
if(rc != GPG_ERR_NO_ERROR){
171
rc = gpgme_op_import(mc->ctx, pgp_data);
172
if (rc != GPG_ERR_NO_ERROR){
185
173
fprintf(stderr, "bad gpgme_op_import: %s: %s\n",
186
174
gpgme_strsource(rc), gpgme_strerror(rc));
187
175
return false;
188
176
}
189
177
190
ret = (int)TEMP_FAILURE_RETRY(close(fd));
178
ret = TEMP_FAILURE_RETRY(close(fd));
191
179
if(ret == -1){
192
180
perror("close");
193
181
}
195
183
return true;
196
184
}
197
185
198
if(debug){
186
if (debug){
199
187
fprintf(stderr, "Initialize gpgme\n");
200
188
}
201
189
202
190
/* Init GPGME */
203
191
gpgme_check_version(NULL);
204
192
rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
205
if(rc != GPG_ERR_NO_ERROR){
193
if (rc != GPG_ERR_NO_ERROR){
206
194
fprintf(stderr, "bad gpgme_engine_check_version: %s: %s\n",
207
195
gpgme_strsource(rc), gpgme_strerror(rc));
208
196
return false;
209
197
}
210
198
211
199
/* Set GPGME home directory for the OpenPGP engine only */
212
rc = gpgme_get_engine_info(&engine_info);
213
if(rc != GPG_ERR_NO_ERROR){
200
rc = gpgme_get_engine_info (&engine_info);
201
if (rc != GPG_ERR_NO_ERROR){
214
202
fprintf(stderr, "bad gpgme_get_engine_info: %s: %s\n",
215
203
gpgme_strsource(rc), gpgme_strerror(rc));
216
204
return false;
229
217
}
230
218
231
219
/* Create new GPGME "context" */
232
rc = gpgme_new(&(mc.ctx));
233
if(rc != GPG_ERR_NO_ERROR){
220
rc = gpgme_new(&(mc->ctx));
221
if (rc != GPG_ERR_NO_ERROR){
234
222
fprintf(stderr, "bad gpgme_new: %s: %s\n",
235
223
gpgme_strsource(rc), gpgme_strerror(rc));
236
224
return false;
237
225
}
238
226
239
if(not import_key(pubkey) or not import_key(seckey)){
227
if (not import_key(pubkey) or not import_key(seckey)){
240
228
return false;
241
229
}
242
230
247
235
* Decrypt OpenPGP data.
248
236
* Returns -1 on error
249
237
*/
250
static ssize_t pgp_packet_decrypt(const char *cryptotext,
251
size_t crypto_size,
252
char **plaintext){
238
static ssize_t pgp_packet_decrypt (const mandos_context *mc,
239
const char *cryptotext,
240
size_t crypto_size,
241
char **plaintext){
253
242
gpgme_data_t dh_crypto, dh_plain;
254
243
gpgme_error_t rc;
255
244
ssize_t ret;
256
245
size_t plaintext_capacity = 0;
257
246
ssize_t plaintext_length = 0;
258
247
259
if(debug){
248
if (debug){
260
249
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
261
250
}
262
251
263
252
/* Create new GPGME data buffer from memory cryptotext */
264
253
rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,
265
254
0);
266
if(rc != GPG_ERR_NO_ERROR){
255
if (rc != GPG_ERR_NO_ERROR){
267
256
fprintf(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
268
257
gpgme_strsource(rc), gpgme_strerror(rc));
269
258
return -1;
271
260
272
261
/* Create new empty GPGME data buffer for the plaintext */
273
262
rc = gpgme_data_new(&dh_plain);
274
if(rc != GPG_ERR_NO_ERROR){
263
if (rc != GPG_ERR_NO_ERROR){
275
264
fprintf(stderr, "bad gpgme_data_new: %s: %s\n",
276
265
gpgme_strsource(rc), gpgme_strerror(rc));
277
266
gpgme_data_release(dh_crypto);
280
269
281
270
/* Decrypt data from the cryptotext data buffer to the plaintext
282
271
data buffer */
283
rc = gpgme_op_decrypt(mc.ctx, dh_crypto, dh_plain);
284
if(rc != GPG_ERR_NO_ERROR){
272
rc = gpgme_op_decrypt(mc->ctx, dh_crypto, dh_plain);
273
if (rc != GPG_ERR_NO_ERROR){
285
274
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
286
275
gpgme_strsource(rc), gpgme_strerror(rc));
287
276
plaintext_length = -1;
288
if(debug){
277
if (debug){
289
278
gpgme_decrypt_result_t result;
290
result = gpgme_op_decrypt_result(mc.ctx);
291
if(result == NULL){
279
result = gpgme_op_decrypt_result(mc->ctx);
280
if (result == NULL){
292
281
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
293
282
} else {
294
283
fprintf(stderr, "Unsupported algorithm: %s\n",
321
310
}
322
311
323
312
/* Seek back to the beginning of the GPGME plaintext data buffer */
324
if(gpgme_data_seek(dh_plain, (off_t)0, SEEK_SET) == -1){
313
if (gpgme_data_seek(dh_plain, (off_t) 0, SEEK_SET) == -1){
325
314
perror("gpgme_data_seek");
326
315
plaintext_length = -1;
327
316
goto decrypt_end;
329
318
330
319
*plaintext = NULL;
331
320
while(true){
332
plaintext_capacity = incbuffer(plaintext,
321
plaintext_capacity = adjustbuffer(plaintext,
333
322
(size_t)plaintext_length,
334
323
plaintext_capacity);
335
if(plaintext_capacity == 0){
336
perror("incbuffer");
324
if (plaintext_capacity == 0){
325
perror("adjustbuffer");
337
326
plaintext_length = -1;
338
327
goto decrypt_end;
339
328
}
341
330
ret = gpgme_data_read(dh_plain, *plaintext + plaintext_length,
342
331
BUFFER_SIZE);
343
332
/* Print the data, if any */
344
if(ret == 0){
333
if (ret == 0){
345
334
/* EOF */
346
335
break;
347
336
}
371
360
return plaintext_length;
372
361
}
373
362
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)
363
static const char * safer_gnutls_strerror (int value) {
364
const char *ret = gnutls_strerror (value); /* Spurious warning */
365
if (ret == NULL)
378
366
ret = "(unknown)";
379
367
return ret;
380
368
}
385
373
fprintf(stderr, "GnuTLS: %s", string);
386
374
}
387
375
388
static int init_gnutls_global(const char *pubkeyfilename,
376
static int init_gnutls_global(mandos_context *mc,
377
const char *pubkeyfilename,
389
378
const char *seckeyfilename){
390
379
int ret;
391
380
394
383
}
395
384
396
385
ret = gnutls_global_init();
397
if(ret != GNUTLS_E_SUCCESS){
398
fprintf(stderr, "GnuTLS global_init: %s\n",
399
safer_gnutls_strerror(ret));
386
if (ret != GNUTLS_E_SUCCESS) {
387
fprintf (stderr, "GnuTLS global_init: %s\n",
388
safer_gnutls_strerror(ret));
400
389
return -1;
401
390
}
402
391
403
if(debug){
392
if (debug){
404
393
/* "Use a log level over 10 to enable all debugging options."
405
394
* - GnuTLS manual
406
395
*/
409
398
}
410
399
411
400
/* OpenPGP credentials */
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();
401
gnutls_certificate_allocate_credentials(&mc->cred);
402
if (ret != GNUTLS_E_SUCCESS){
403
fprintf (stderr, "GnuTLS memory error: %s\n", /* Spurious
404
warning */
405
safer_gnutls_strerror(ret));
406
gnutls_global_deinit ();
420
407
return -1;
421
408
}
422
409
427
414
}
428
415
429
416
ret = gnutls_certificate_set_openpgp_key_file
430
(mc.cred, pubkeyfilename, seckeyfilename,
417
(mc->cred, pubkeyfilename, seckeyfilename,
431
418
GNUTLS_OPENPGP_FMT_BASE64);
432
if(ret != GNUTLS_E_SUCCESS){
419
if (ret != GNUTLS_E_SUCCESS) {
433
420
fprintf(stderr,
434
421
"Error[%d] while reading the OpenPGP key pair ('%s',"
435
422
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
439
426
}
440
427
441
428
/* GnuTLS server initialization */
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));
429
ret = gnutls_dh_params_init(&mc->dh_params);
430
if (ret != GNUTLS_E_SUCCESS) {
431
fprintf (stderr, "Error in GnuTLS DH parameter initialization:"
432
" %s\n", safer_gnutls_strerror(ret));
446
433
goto globalfail;
447
434
}
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));
435
ret = gnutls_dh_params_generate2(mc->dh_params, mc->dh_bits);
436
if (ret != GNUTLS_E_SUCCESS) {
437
fprintf (stderr, "Error in GnuTLS prime generation: %s\n",
438
safer_gnutls_strerror(ret));
452
439
goto globalfail;
453
440
}
454
441
455
gnutls_certificate_set_dh_params(mc.cred, mc.dh_params);
442
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
456
443
457
444
return 0;
458
445
459
446
globalfail:
460
447
461
gnutls_certificate_free_credentials(mc.cred);
448
gnutls_certificate_free_credentials(mc->cred);
462
449
gnutls_global_deinit();
463
gnutls_dh_params_deinit(mc.dh_params);
450
gnutls_dh_params_deinit(mc->dh_params);
464
451
return -1;
465
452
}
466
453
467
static int init_gnutls_session(gnutls_session_t *session){
454
static int init_gnutls_session(mandos_context *mc,
455
gnutls_session_t *session){
468
456
int ret;
469
457
/* GnuTLS session creation */
470
458
ret = gnutls_init(session, GNUTLS_SERVER);
471
if(ret != GNUTLS_E_SUCCESS){
459
if (ret != GNUTLS_E_SUCCESS){
472
460
fprintf(stderr, "Error in GnuTLS session initialization: %s\n",
473
461
safer_gnutls_strerror(ret));
474
462
}
475
463
476
464
{
477
465
const char *err;
478
ret = gnutls_priority_set_direct(*session, mc.priority, &err);
479
if(ret != GNUTLS_E_SUCCESS){
466
ret = gnutls_priority_set_direct(*session, mc->priority, &err);
467
if (ret != GNUTLS_E_SUCCESS) {
480
468
fprintf(stderr, "Syntax error at: %s\n", err);
481
469
fprintf(stderr, "GnuTLS error: %s\n",
482
470
safer_gnutls_strerror(ret));
483
gnutls_deinit(*session);
471
gnutls_deinit (*session);
484
472
return -1;
485
473
}
486
474
}
487
475
488
476
ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,
489
mc.cred);
490
if(ret != GNUTLS_E_SUCCESS){
477
mc->cred);
478
if (ret != GNUTLS_E_SUCCESS) {
491
479
fprintf(stderr, "Error setting GnuTLS credentials: %s\n",
492
480
safer_gnutls_strerror(ret));
493
gnutls_deinit(*session);
481
gnutls_deinit (*session);
494
482
return -1;
495
483
}
496
484
497
485
/* ignore client certificate if any. */
498
gnutls_certificate_server_set_request(*session,
499
GNUTLS_CERT_IGNORE);
486
gnutls_certificate_server_set_request (*session,
487
GNUTLS_CERT_IGNORE);
500
488
501
gnutls_dh_set_prime_bits(*session, mc.dh_bits);
489
gnutls_dh_set_prime_bits (*session, mc->dh_bits);
502
490
503
491
return 0;
504
492
}
510
498
/* Called when a Mandos server is found */
511
499
static int start_mandos_communication(const char *ip, uint16_t port,
512
500
AvahiIfIndex if_index,
513
int af){
501
mandos_context *mc){
514
502
int ret, tcp_sd;
515
ssize_t sret;
516
union {
517
struct sockaddr_in in;
518
struct sockaddr_in6 in6;
519
} to;
503
union { struct sockaddr in; struct sockaddr_in6 in6; } to;
520
504
char *buffer = NULL;
521
505
char *decrypted_buffer;
522
506
size_t buffer_length = 0;
524
508
ssize_t decrypted_buffer_size;
525
509
size_t written;
526
510
int retval = 0;
511
char interface[IF_NAMESIZE];
527
512
gnutls_session_t session;
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){
513
514
ret = init_gnutls_session (mc, &session);
515
if (ret != 0){
544
516
return -1;
545
517
}
546
518
547
519
if(debug){
548
fprintf(stderr, "Setting up a TCP connection to %s, port %" PRIu16
520
fprintf(stderr, "Setting up a tcp connection to %s, port %" PRIu16
549
521
"\n", ip, port);
550
522
}
551
523
552
tcp_sd = socket(pf, SOCK_STREAM, 0);
553
if(tcp_sd < 0){
524
tcp_sd = socket(PF_INET6, SOCK_STREAM, 0);
525
if(tcp_sd < 0) {
554
526
perror("socket");
555
527
return -1;
556
528
}
557
529
530
if(debug){
531
if(if_indextoname((unsigned int)if_index, interface) == NULL){
532
perror("if_indextoname");
533
return -1;
534
}
535
fprintf(stderr, "Binding to interface %s\n", interface);
536
}
537
558
538
memset(&to, 0, sizeof(to));
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 ){
539
to.in6.sin6_family = AF_INET6;
540
/* It would be nice to have a way to detect if we were passed an
541
IPv4 address here. Now we assume an IPv6 address. */
542
ret = inet_pton(AF_INET6, ip, &to.in6.sin6_addr);
543
if (ret < 0 ){
567
544
perror("inet_pton");
568
545
return -1;
569
546
}
571
548
fprintf(stderr, "Bad address: %s\n", ip);
572
549
return -1;
573
550
}
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
}
551
to.in6.sin6_port = htons(port); /* Spurious warning */
552
553
to.in6.sin6_scope_id = (uint32_t)if_index;
595
554
596
555
if(debug){
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){
556
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
557
port);
558
char addrstr[INET6_ADDRSTRLEN] = "";
559
if(inet_ntop(to.in6.sin6_family, &(to.in6.sin6_addr), addrstr,
560
sizeof(addrstr)) == NULL){
620
561
perror("inet_ntop");
621
562
} else {
622
563
if(strcmp(addrstr, ip) != 0){
625
566
}
626
567
}
627
568
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){
569
ret = connect(tcp_sd, &to.in, sizeof(to));
570
if (ret < 0){
634
571
perror("connect");
635
572
return -1;
636
573
}
637
574
638
575
const char *out = mandos_protocol_version;
639
576
written = 0;
640
while(true){
577
while (true){
641
578
size_t out_size = strlen(out);
642
ret = (int)TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
579
ret = TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
643
580
out_size - written));
644
if(ret == -1){
581
if (ret == -1){
645
582
perror("write");
646
583
retval = -1;
647
584
goto mandos_end;
650
587
if(written < out_size){
651
588
continue;
652
589
} else {
653
if(out == mandos_protocol_version){
590
if (out == mandos_protocol_version){
654
591
written = 0;
655
592
out = "\r\n";
656
593
} else {
663
600
fprintf(stderr, "Establishing TLS session with %s\n", ip);
664
601
}
665
602
666
gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t) tcp_sd);
603
gnutls_transport_set_ptr (session, (gnutls_transport_ptr_t) tcp_sd);
667
604
668
605
do{
669
ret = gnutls_handshake(session);
606
ret = gnutls_handshake (session);
670
607
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
671
608
672
if(ret != GNUTLS_E_SUCCESS){
609
if (ret != GNUTLS_E_SUCCESS){
673
610
if(debug){
674
611
fprintf(stderr, "*** GnuTLS Handshake failed ***\n");
675
gnutls_perror(ret);
612
gnutls_perror (ret);
676
613
}
677
614
retval = -1;
678
615
goto mandos_end;
681
618
/* Read OpenPGP packet that contains the wanted password */
682
619
683
620
if(debug){
684
fprintf(stderr, "Retrieving OpenPGP encrypted password from %s\n",
621
fprintf(stderr, "Retrieving pgp encrypted password from %s\n",
685
622
ip);
686
623
}
687
624
688
625
while(true){
689
buffer_capacity = incbuffer(&buffer, buffer_length,
626
buffer_capacity = adjustbuffer(&buffer, buffer_length,
690
627
buffer_capacity);
691
if(buffer_capacity == 0){
692
perror("incbuffer");
628
if (buffer_capacity == 0){
629
perror("adjustbuffer");
693
630
retval = -1;
694
631
goto mandos_end;
695
632
}
696
633
697
sret = gnutls_record_recv(session, buffer+buffer_length,
698
BUFFER_SIZE);
699
if(sret == 0){
634
ret = gnutls_record_recv(session, buffer+buffer_length,
635
BUFFER_SIZE);
636
if (ret == 0){
700
637
break;
701
638
}
702
if(sret < 0){
703
switch(sret){
639
if (ret < 0){
640
switch(ret){
704
641
case GNUTLS_E_INTERRUPTED:
705
642
case GNUTLS_E_AGAIN:
706
643
break;
707
644
case GNUTLS_E_REHANDSHAKE:
708
645
do{
709
ret = gnutls_handshake(session);
646
ret = gnutls_handshake (session);
710
647
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
711
if(ret < 0){
648
if (ret < 0){
712
649
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
713
gnutls_perror(ret);
650
gnutls_perror (ret);
714
651
retval = -1;
715
652
goto mandos_end;
716
653
}
719
656
fprintf(stderr, "Unknown error while reading data from"
720
657
" encrypted session with Mandos server\n");
721
658
retval = -1;
722
gnutls_bye(session, GNUTLS_SHUT_RDWR);
659
gnutls_bye (session, GNUTLS_SHUT_RDWR);
723
660
goto mandos_end;
724
661
}
725
662
} else {
726
buffer_length += (size_t) sret;
663
buffer_length += (size_t) ret;
727
664
}
728
665
}
729
666
731
668
fprintf(stderr, "Closing TLS session\n");
732
669
}
733
670
734
gnutls_bye(session, GNUTLS_SHUT_RDWR);
671
gnutls_bye (session, GNUTLS_SHUT_RDWR);
735
672
736
if(buffer_length > 0){
737
decrypted_buffer_size = pgp_packet_decrypt(buffer,
673
if (buffer_length > 0){
674
decrypted_buffer_size = pgp_packet_decrypt(mc, buffer,
738
675
buffer_length,
739
676
&decrypted_buffer);
740
if(decrypted_buffer_size >= 0){
677
if (decrypted_buffer_size >= 0){
741
678
written = 0;
742
679
while(written < (size_t) decrypted_buffer_size){
743
ret = (int)fwrite(decrypted_buffer + written, 1,
744
(size_t)decrypted_buffer_size - written,
745
stdout);
680
ret = (int)fwrite (decrypted_buffer + written, 1,
681
(size_t)decrypted_buffer_size - written,
682
stdout);
746
683
if(ret == 0 and ferror(stdout)){
747
684
if(debug){
748
685
fprintf(stderr, "Error writing encrypted data: %s\n",
765
702
766
703
mandos_end:
767
704
free(buffer);
768
ret = (int)TEMP_FAILURE_RETRY(close(tcp_sd));
705
ret = TEMP_FAILURE_RETRY(close(tcp_sd));
769
706
if(ret == -1){
770
707
perror("close");
771
708
}
772
gnutls_deinit(session);
709
gnutls_deinit (session);
773
710
return retval;
774
711
}
775
712
776
713
static void resolve_callback(AvahiSServiceResolver *r,
777
714
AvahiIfIndex interface,
778
AvahiProtocol proto,
715
AVAHI_GCC_UNUSED AvahiProtocol protocol,
779
716
AvahiResolverEvent event,
780
717
const char *name,
781
718
const char *type,
786
723
AVAHI_GCC_UNUSED AvahiStringList *txt,
787
724
AVAHI_GCC_UNUSED AvahiLookupResultFlags
788
725
flags,
789
__attribute__((unused)) void* userdata){
726
void* userdata) {
727
mandos_context *mc = userdata;
790
728
assert(r);
791
729
792
730
/* Called whenever a service has been resolved successfully or
793
731
timed out */
794
732
795
switch(event){
733
switch (event) {
796
734
default:
797
735
case AVAHI_RESOLVER_FAILURE:
798
736
fprintf(stderr, "(Avahi Resolver) Failed to resolve service '%s'"
799
737
" of type '%s' in domain '%s': %s\n", name, type, domain,
800
avahi_strerror(avahi_server_errno(mc.server)));
738
avahi_strerror(avahi_server_errno(mc->server)));
801
739
break;
802
740
803
741
case AVAHI_RESOLVER_FOUND:
806
744
avahi_address_snprint(ip, sizeof(ip), address);
807
745
if(debug){
808
746
fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %"
809
PRIdMAX ") on port %" PRIu16 "\n", name, host_name,
810
ip, (intmax_t)interface, port);
747
PRIu16 ") on port %d\n", name, host_name, ip,
748
interface, port);
811
749
}
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);
750
int ret = start_mandos_communication(ip, port, interface, mc);
751
if (ret == 0){
752
avahi_simple_poll_quit(mc->simple_poll);
816
753
}
817
754
}
818
755
}
819
756
avahi_s_service_resolver_free(r);
820
757
}
821
758
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){
759
static void browse_callback( AvahiSServiceBrowser *b,
760
AvahiIfIndex interface,
761
AvahiProtocol protocol,
762
AvahiBrowserEvent event,
763
const char *name,
764
const char *type,
765
const char *domain,
766
AVAHI_GCC_UNUSED AvahiLookupResultFlags
767
flags,
768
void* userdata) {
769
mandos_context *mc = userdata;
832
770
assert(b);
833
771
834
772
/* Called whenever a new services becomes available on the LAN or
835
773
is removed from the LAN */
836
774
837
switch(event){
775
switch (event) {
838
776
default:
839
777
case AVAHI_BROWSER_FAILURE:
840
778
841
779
fprintf(stderr, "(Avahi browser) %s\n",
842
avahi_strerror(avahi_server_errno(mc.server)));
843
avahi_simple_poll_quit(mc.simple_poll);
780
avahi_strerror(avahi_server_errno(mc->server)));
781
avahi_simple_poll_quit(mc->simple_poll);
844
782
return;
845
783
846
784
case AVAHI_BROWSER_NEW:
849
787
the callback function is called the Avahi server will free the
850
788
resolver for us. */
851
789
852
if(!(avahi_s_service_resolver_new(mc.server, interface,
790
if (!(avahi_s_service_resolver_new(mc->server, interface,
853
791
protocol, name, type, domain,
854
792
AVAHI_PROTO_INET6, 0,
855
resolve_callback, NULL)))
793
resolve_callback, mc)))
856
794
fprintf(stderr, "Avahi: Failed to resolve service '%s': %s\n",
857
name, avahi_strerror(avahi_server_errno(mc.server)));
795
name, avahi_strerror(avahi_server_errno(mc->server)));
858
796
break;
859
797
860
798
case AVAHI_BROWSER_REMOVE:
869
807
}
870
808
}
871
809
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
878
810
int main(int argc, char *argv[]){
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");
811
AvahiSServiceBrowser *sb = NULL;
812
int error;
813
int ret;
814
int exitcode = EXIT_SUCCESS;
815
const char *interface = "eth0";
816
struct ifreq network;
817
int sd;
818
uid_t uid;
819
gid_t gid;
820
char *connect_to = NULL;
821
char tempdir[] = "/tmp/mandosXXXXXX";
822
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
823
const char *seckey = PATHDIR "/" SECKEY;
824
const char *pubkey = PATHDIR "/" PUBKEY;
825
826
mandos_context mc = { .simple_poll = NULL, .server = NULL,
827
.dh_bits = 1024, .priority = "SECURE256"
828
":!CTYPE-X.509:+CTYPE-OPENPGP" };
829
bool gnutls_initalized = false;
830
bool gpgme_initalized = false;
831
832
{
833
struct argp_option options[] = {
834
{ .name = "debug", .key = 128,
835
.doc = "Debug mode", .group = 3 },
836
{ .name = "connect", .key = 'c',
837
.arg = "ADDRESS:PORT",
838
.doc = "Connect directly to a specific Mandos server",
839
.group = 1 },
840
{ .name = "interface", .key = 'i',
841
.arg = "NAME",
842
.doc = "Interface that will be used to search for Mandos"
843
" servers",
844
.group = 1 },
845
{ .name = "seckey", .key = 's',
846
.arg = "FILE",
847
.doc = "OpenPGP secret key file base name",
848
.group = 1 },
849
{ .name = "pubkey", .key = 'p',
850
.arg = "FILE",
851
.doc = "OpenPGP public key file base name",
852
.group = 2 },
853
{ .name = "dh-bits", .key = 129,
854
.arg = "BITS",
855
.doc = "Bit length of the prime number used in the"
856
" Diffie-Hellman key exchange",
857
.group = 2 },
858
{ .name = "priority", .key = 130,
859
.arg = "STRING",
860
.doc = "GnuTLS priority string for the TLS handshake",
861
.group = 1 },
862
{ .name = NULL }
863
};
864
865
error_t parse_opt (int key, char *arg,
866
struct argp_state *state) {
867
/* Get the INPUT argument from `argp_parse', which we know is
868
a pointer to our plugin list pointer. */
869
switch (key) {
870
case 128: /* --debug */
871
debug = true;
872
break;
873
case 'c': /* --connect */
874
connect_to = arg;
875
break;
876
case 'i': /* --interface */
877
interface = arg;
878
break;
879
case 's': /* --seckey */
880
seckey = arg;
881
break;
882
case 'p': /* --pubkey */
883
pubkey = arg;
884
break;
885
case 129: /* --dh-bits */
886
errno = 0;
887
mc.dh_bits = (unsigned int) strtol(arg, NULL, 10);
888
if (errno){
889
perror("strtol");
890
exit(EXIT_FAILURE);
1058
891
}
892
break;
893
case 130: /* --priority */
894
mc.priority = arg;
895
break;
896
case ARGP_KEY_ARG:
897
argp_usage (state);
898
case ARGP_KEY_END:
899
break;
900
default:
901
return ARGP_ERR_UNKNOWN;
1059
902
}
1060
#endif
903
return 0;
904
}
905
906
struct argp argp = { .options = options, .parser = parse_opt,
907
.args_doc = "",
908
.doc = "Mandos client -- Get and decrypt"
909
" passwords from a Mandos server" };
910
ret = argp_parse (&argp, argc, argv, 0, 0, NULL);
911
if (ret == ARGP_ERR_UNKNOWN){
912
fprintf(stderr, "Unknown error while parsing arguments\n");
913
exitcode = EXIT_FAILURE;
1061
914
goto end;
1062
915
}
1063
916
}
1064
/* sleep checking until interface is running */
1065
for(int i=0; i < delay * 4; i++){
917
918
/* If the interface is down, bring it up */
919
{
920
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
921
if(sd < 0) {
922
perror("socket");
923
exitcode = EXIT_FAILURE;
924
goto end;
925
}
926
strcpy(network.ifr_name, interface);
1066
927
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1067
928
if(ret == -1){
1068
929
perror("ioctl SIOCGIFFLAGS");
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);
930
exitcode = EXIT_FAILURE;
931
goto end;
932
}
933
if((network.ifr_flags & IFF_UP) == 0){
934
network.ifr_flags |= IFF_UP;
935
ret = ioctl(sd, SIOCSIFFLAGS, &network);
936
if(ret == -1){
937
perror("ioctl SIOCSIFFLAGS");
938
exitcode = EXIT_FAILURE;
939
goto end;
940
}
941
}
942
ret = TEMP_FAILURE_RETRY(close(sd));
1086
943
if(ret == -1){
1087
perror("klogctl");
944
perror("close");
1088
945
}
1089
946
}
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'){
947
948
uid = getuid();
949
gid = getgid();
950
951
ret = setuid(uid);
952
if (ret == -1){
953
perror("setuid");
954
}
955
956
setgid(gid);
957
if (ret == -1){
958
perror("setgid");
959
}
960
961
ret = init_gnutls_global(&mc, pubkey, seckey);
962
if (ret == -1){
963
fprintf(stderr, "init_gnutls_global failed\n");
964
exitcode = EXIT_FAILURE;
965
goto end;
966
} else {
967
gnutls_initalized = true;
968
}
969
970
if(mkdtemp(tempdir) == NULL){
971
perror("mkdtemp");
972
tempdir[0] = '\0';
973
goto end;
974
}
975
976
if(not init_gpgme(&mc, pubkey, seckey, tempdir)){
977
fprintf(stderr, "gpgme_initalized failed\n");
978
exitcode = EXIT_FAILURE;
979
goto end;
980
} else {
981
gpgme_initalized = true;
982
}
983
1131
984
if_index = (AvahiIfIndex) if_nametoindex(interface);
1132
985
if(if_index == 0){
1133
986
fprintf(stderr, "No such interface: \"%s\"\n", interface);
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
987
exit(EXIT_FAILURE);
988
}
989
990
if(connect_to != NULL){
991
/* Connect directly, do not use Zeroconf */
992
/* (Mainly meant for debugging) */
993
char *address = strrchr(connect_to, ':');
994
if(address == NULL){
995
fprintf(stderr, "No colon in address\n");
996
exitcode = EXIT_FAILURE;
997
goto end;
998
}
999
errno = 0;
1000
uint16_t port = (uint16_t) strtol(address+1, NULL, 10);
1001
if(errno){
1002
perror("Bad port number");
1003
exitcode = EXIT_FAILURE;
1004
goto end;
1005
}
1006
*address = '\0';
1007
address = connect_to;
1008
ret = start_mandos_communication(address, port, if_index, &mc);
1009
if(ret < 0){
1010
exitcode = EXIT_FAILURE;
1011
} else {
1012
exitcode = EXIT_SUCCESS;
1013
}
1014
goto end;
1015
}
1016
1017
if (not debug){
1018
avahi_set_log_function(empty_log);
1019
}
1020
1021
/* Initialize the pseudo-RNG for Avahi */
1022
srand((unsigned int) time(NULL));
1023
1024
/* Allocate main Avahi loop object */
1025
mc.simple_poll = avahi_simple_poll_new();
1026
if (mc.simple_poll == NULL) {
1027
fprintf(stderr, "Avahi: Failed to create simple poll"
1028
" object.\n");
1029
exitcode = EXIT_FAILURE;
1030
goto end;
1031
}
1032
1033
{
1034
AvahiServerConfig config;
1035
/* Do not publish any local Zeroconf records */
1036
avahi_server_config_init(&config);
1037
config.publish_hinfo = 0;
1038
config.publish_addresses = 0;
1039
config.publish_workstation = 0;
1040
config.publish_domain = 0;
1041
1042
/* Allocate a new server */
1043
mc.server = avahi_server_new(avahi_simple_poll_get
1044
(mc.simple_poll), &config, NULL,
1045
NULL, &error);
1046
1047
/* Free the Avahi configuration data */
1048
avahi_server_config_free(&config);
1049
}
1050
1051
/* Check if creating the Avahi server object succeeded */
1052
if (mc.server == NULL) {
1053
fprintf(stderr, "Failed to create Avahi server: %s\n",
1054
avahi_strerror(error));
1055
exitcode = EXIT_FAILURE;
1056
goto end;
1057
}
1058
1059
/* Create the Avahi service browser */
1060
sb = avahi_s_service_browser_new(mc.server, if_index,
1061
AVAHI_PROTO_INET6,
1062
"_mandos._tcp", NULL, 0,
1063
browse_callback, &mc);
1064
if (sb == NULL) {
1065
fprintf(stderr, "Failed to create service browser: %s\n",
1066
avahi_strerror(avahi_server_errno(mc.server)));
1067
exitcode = EXIT_FAILURE;
1068
goto end;
1069
}
1070
1071
/* Run the main loop */
1072
1073
if (debug){
1074
fprintf(stderr, "Starting Avahi loop search\n");
1075
}
1076
1077
avahi_simple_poll_loop(mc.simple_poll);
1078
1250
1079
end:
1251
1252
if(debug){
1253
fprintf(stderr, "%s exiting\n", argv[0]);
1254
}
1255
1256
/* Cleanup things */
1257
if(sb != NULL)
1258
avahi_s_service_browser_free(sb);
1259
1260
if(mc.server != NULL)
1261
avahi_server_free(mc.server);
1262
1263
if(mc.simple_poll != NULL)
1264
avahi_simple_poll_free(mc.simple_poll);
1265
1266
if(gnutls_initialized){
1267
gnutls_certificate_free_credentials(mc.cred);
1268
gnutls_global_deinit();
1269
gnutls_dh_params_deinit(mc.dh_params);
1270
}
1271
1272
if(gpgme_initialized){
1273
gpgme_release(mc.ctx);
1274
}
1275
1276
/* Removes the temp directory used by GPGME */
1277
if(tempdir_created){
1278
DIR *d;
1279
struct dirent *direntry;
1280
d = opendir(tempdir);
1281
if(d == NULL){
1282
if(errno != ENOENT){
1080
1081
if (debug){
1082
fprintf(stderr, "%s exiting\n", argv[0]);
1083
}
1084
1085
/* Cleanup things */
1086
if (sb != NULL)
1087
avahi_s_service_browser_free(sb);
1088
1089
if (mc.server != NULL)
1090
avahi_server_free(mc.server);
1091
1092
if (mc.simple_poll != NULL)
1093
avahi_simple_poll_free(mc.simple_poll);
1094
1095
if (gnutls_initalized){
1096
gnutls_certificate_free_credentials(mc.cred);
1097
gnutls_global_deinit ();
1098
gnutls_dh_params_deinit(mc.dh_params);
1099
}
1100
1101
if(gpgme_initalized){
1102
gpgme_release(mc.ctx);
1103
}
1104
1105
/* Removes the temp directory used by GPGME */
1106
if(tempdir[0] != '\0'){
1107
DIR *d;
1108
struct dirent *direntry;
1109
d = opendir(tempdir);
1110
if(d == NULL){
1283
1111
perror("opendir");
1284
}
1285
} else {
1286
while(true){
1287
direntry = readdir(d);
1288
if(direntry == NULL){
1289
break;
1290
}
1291
/* Skip "." and ".." */
1292
if(direntry->d_name[0] == '.'
1293
and (direntry->d_name[1] == '\0'
1294
or (direntry->d_name[1] == '.'
1295
and direntry->d_name[2] == '\0'))){
1296
continue;
1297
}
1298
char *fullname = NULL;
1299
ret = asprintf(&fullname, "%s/%s", tempdir,
1300
direntry->d_name);
1301
if(ret < 0){
1302
perror("asprintf");
1303
continue;
1304
}
1305
ret = remove(fullname);
1306
if(ret == -1){
1307
fprintf(stderr, "remove(\"%s\"): %s\n", fullname,
1308
strerror(errno));
1309
}
1310
free(fullname);
1311
}
1312
closedir(d);
1313
}
1314
ret = rmdir(tempdir);
1315
if(ret == -1 and errno != ENOENT){
1316
perror("rmdir");
1317
}
1318
}
1319
1320
return exitcode;
1112
} else {
1113
while(true){
1114
direntry = readdir(d);
1115
if(direntry == NULL){
1116
break;
1117
}
1118
if (direntry->d_type == DT_REG){
1119
char *fullname = NULL;
1120
ret = asprintf(&fullname, "%s/%s", tempdir,
1121
direntry->d_name);
1122
if(ret < 0){
1123
perror("asprintf");
1124
continue;
1125
}
1126
ret = unlink(fullname);
1127
if(ret == -1){
1128
fprintf(stderr, "unlink(\"%s\"): %s",
1129
fullname, strerror(errno));
1130
}
1131
free(fullname);
1132
}
1133
}
1134
closedir(d);
1135
}
1136
ret = rmdir(tempdir);
1137
if(ret == -1){
1138
perror("rmdir");
1139
}
1140
}
1141
1142
return exitcode;
1321
1143
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0