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- Committer: Teddy Hogeborn
- Date: 2008-11-08 17:26:35 UTC
- Revision ID: teddy@fukt.bsnet.se-20081108172635-6eexzbysvsk4bu1z
* mandos: Also import "with_statement" and "absolute_import" from
"__future__. Import "closing" from "contextlib".
(Client.__init__): Use "with closing" on "secfile".
(Client.checker_callback): Call "self.bump_timeout()" instead of
doing it directly.
(Client.bump_timeout): New method to bump up the timeout.
(TCP_handler.handle): Simplify code to provide fallback default for
GnuTLS priority string.
(IPv6_TCPServer): Do not inherit from
"SocketServer.ForkingTCPServer", since that is
undocumented - instead, follow the example code
from the documentation.
(if_nametoindex): Use "with closing" on the socket.
"__future__. Import "closing" from "contextlib".
(Client.__init__): Use "with closing" on "secfile".
(Client.checker_callback): Call "self.bump_timeout()" instead of
doing it directly.
(Client.bump_timeout): New method to bump up the timeout.
(TCP_handler.handle): Simplify code to provide fallback default for
GnuTLS priority string.
(IPv6_TCPServer): Do not inherit from
"SocketServer.ForkingTCPServer", since that is
undocumented - instead, follow the example code
from the documentation.
(if_nametoindex): Use "with closing" on the socket.
- files added:
- debian/mandos-client.config
- files removed:
- debian/watch
- 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(),
79
sigaction(), SIGTERM, sigaction,
80
sig_atomic_t */
81
82
#ifdef __linux__
83
#include <sys/klog.h> /* klogctl() */
84
#endif /* __linux__ */
85
74
86
75
/* Avahi */
87
76
/* All Avahi types, constants and functions
100
89
gnutls_*
101
90
init_gnutls_session(),
102
91
GNUTLS_* */
103
#include <gnutls/openpgp.h>
104
/* gnutls_certificate_set_openpgp_key_file(),
92
#include <gnutls/openpgp.h> /* gnutls_certificate_set_openpgp_key_file(),
105
93
GNUTLS_OPENPGP_FMT_BASE64 */
106
94
107
95
/* GPGME */
133
121
gpgme_ctx_t ctx;
134
122
} mandos_context;
135
123
136
/* global context so signal handler can reach it*/
137
mandos_context mc;
138
139
124
/*
140
* Make additional room in "buffer" for at least BUFFER_SIZE more
141
* bytes. "buffer_capacity" is how much is currently allocated,
125
* Make room in "buffer" for at least BUFFER_SIZE additional bytes.
126
* "buffer_capacity" is how much is currently allocated,
142
127
* "buffer_length" is how much is already used.
143
128
*/
144
size_t incbuffer(char **buffer, size_t buffer_length,
129
size_t adjustbuffer(char **buffer, size_t buffer_length,
145
130
size_t buffer_capacity){
146
if(buffer_length + BUFFER_SIZE > buffer_capacity){
131
if (buffer_length + BUFFER_SIZE > buffer_capacity){
147
132
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
148
if(buffer == NULL){
133
if (buffer == NULL){
149
134
return 0;
150
135
}
151
136
buffer_capacity += BUFFER_SIZE;
156
141
/*
157
142
* Initialize GPGME.
158
143
*/
159
static bool init_gpgme(const char *seckey,
144
static bool init_gpgme(mandos_context *mc, const char *seckey,
160
145
const char *pubkey, const char *tempdir){
161
146
int ret;
162
147
gpgme_error_t rc;
164
149
165
150
166
151
/*
167
* Helper function to insert pub and seckey to the engine keyring.
152
* Helper function to insert pub and seckey to the enigne keyring.
168
153
*/
169
154
bool import_key(const char *filename){
170
155
int fd;
171
156
gpgme_data_t pgp_data;
172
157
173
fd = (int)TEMP_FAILURE_RETRY(open(filename, O_RDONLY));
158
fd = TEMP_FAILURE_RETRY(open(filename, O_RDONLY));
174
159
if(fd == -1){
175
160
perror("open");
176
161
return false;
177
162
}
178
163
179
164
rc = gpgme_data_new_from_fd(&pgp_data, fd);
180
if(rc != GPG_ERR_NO_ERROR){
165
if (rc != GPG_ERR_NO_ERROR){
181
166
fprintf(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
182
167
gpgme_strsource(rc), gpgme_strerror(rc));
183
168
return false;
184
169
}
185
170
186
rc = gpgme_op_import(mc.ctx, pgp_data);
187
if(rc != GPG_ERR_NO_ERROR){
171
rc = gpgme_op_import(mc->ctx, pgp_data);
172
if (rc != GPG_ERR_NO_ERROR){
188
173
fprintf(stderr, "bad gpgme_op_import: %s: %s\n",
189
174
gpgme_strsource(rc), gpgme_strerror(rc));
190
175
return false;
191
176
}
192
177
193
ret = (int)TEMP_FAILURE_RETRY(close(fd));
178
ret = TEMP_FAILURE_RETRY(close(fd));
194
179
if(ret == -1){
195
180
perror("close");
196
181
}
198
183
return true;
199
184
}
200
185
201
if(debug){
202
fprintf(stderr, "Initializing GPGME\n");
186
if (debug){
187
fprintf(stderr, "Initialize gpgme\n");
203
188
}
204
189
205
190
/* Init GPGME */
206
191
gpgme_check_version(NULL);
207
192
rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
208
if(rc != GPG_ERR_NO_ERROR){
193
if (rc != GPG_ERR_NO_ERROR){
209
194
fprintf(stderr, "bad gpgme_engine_check_version: %s: %s\n",
210
195
gpgme_strsource(rc), gpgme_strerror(rc));
211
196
return false;
212
197
}
213
198
214
199
/* Set GPGME home directory for the OpenPGP engine only */
215
rc = gpgme_get_engine_info(&engine_info);
216
if(rc != GPG_ERR_NO_ERROR){
200
rc = gpgme_get_engine_info (&engine_info);
201
if (rc != GPG_ERR_NO_ERROR){
217
202
fprintf(stderr, "bad gpgme_get_engine_info: %s: %s\n",
218
203
gpgme_strsource(rc), gpgme_strerror(rc));
219
204
return false;
232
217
}
233
218
234
219
/* Create new GPGME "context" */
235
rc = gpgme_new(&(mc.ctx));
236
if(rc != GPG_ERR_NO_ERROR){
220
rc = gpgme_new(&(mc->ctx));
221
if (rc != GPG_ERR_NO_ERROR){
237
222
fprintf(stderr, "bad gpgme_new: %s: %s\n",
238
223
gpgme_strsource(rc), gpgme_strerror(rc));
239
224
return false;
240
225
}
241
226
242
if(not import_key(pubkey) or not import_key(seckey)){
227
if (not import_key(pubkey) or not import_key(seckey)){
243
228
return false;
244
229
}
245
230
250
235
* Decrypt OpenPGP data.
251
236
* Returns -1 on error
252
237
*/
253
static ssize_t pgp_packet_decrypt(const char *cryptotext,
254
size_t crypto_size,
255
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){
256
242
gpgme_data_t dh_crypto, dh_plain;
257
243
gpgme_error_t rc;
258
244
ssize_t ret;
259
245
size_t plaintext_capacity = 0;
260
246
ssize_t plaintext_length = 0;
261
247
262
if(debug){
248
if (debug){
263
249
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
264
250
}
265
251
266
252
/* Create new GPGME data buffer from memory cryptotext */
267
253
rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,
268
254
0);
269
if(rc != GPG_ERR_NO_ERROR){
255
if (rc != GPG_ERR_NO_ERROR){
270
256
fprintf(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
271
257
gpgme_strsource(rc), gpgme_strerror(rc));
272
258
return -1;
274
260
275
261
/* Create new empty GPGME data buffer for the plaintext */
276
262
rc = gpgme_data_new(&dh_plain);
277
if(rc != GPG_ERR_NO_ERROR){
263
if (rc != GPG_ERR_NO_ERROR){
278
264
fprintf(stderr, "bad gpgme_data_new: %s: %s\n",
279
265
gpgme_strsource(rc), gpgme_strerror(rc));
280
266
gpgme_data_release(dh_crypto);
283
269
284
270
/* Decrypt data from the cryptotext data buffer to the plaintext
285
271
data buffer */
286
rc = gpgme_op_decrypt(mc.ctx, dh_crypto, dh_plain);
287
if(rc != GPG_ERR_NO_ERROR){
272
rc = gpgme_op_decrypt(mc->ctx, dh_crypto, dh_plain);
273
if (rc != GPG_ERR_NO_ERROR){
288
274
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
289
275
gpgme_strsource(rc), gpgme_strerror(rc));
290
276
plaintext_length = -1;
291
if(debug){
277
if (debug){
292
278
gpgme_decrypt_result_t result;
293
result = gpgme_op_decrypt_result(mc.ctx);
294
if(result == NULL){
279
result = gpgme_op_decrypt_result(mc->ctx);
280
if (result == NULL){
295
281
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
296
282
} else {
297
283
fprintf(stderr, "Unsupported algorithm: %s\n",
324
310
}
325
311
326
312
/* Seek back to the beginning of the GPGME plaintext data buffer */
327
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){
328
314
perror("gpgme_data_seek");
329
315
plaintext_length = -1;
330
316
goto decrypt_end;
332
318
333
319
*plaintext = NULL;
334
320
while(true){
335
plaintext_capacity = incbuffer(plaintext,
321
plaintext_capacity = adjustbuffer(plaintext,
336
322
(size_t)plaintext_length,
337
323
plaintext_capacity);
338
if(plaintext_capacity == 0){
339
perror("incbuffer");
324
if (plaintext_capacity == 0){
325
perror("adjustbuffer");
340
326
plaintext_length = -1;
341
327
goto decrypt_end;
342
328
}
344
330
ret = gpgme_data_read(dh_plain, *plaintext + plaintext_length,
345
331
BUFFER_SIZE);
346
332
/* Print the data, if any */
347
if(ret == 0){
333
if (ret == 0){
348
334
/* EOF */
349
335
break;
350
336
}
374
360
return plaintext_length;
375
361
}
376
362
377
static const char * safer_gnutls_strerror(int value){
378
const char *ret = gnutls_strerror(value); /* Spurious warning from
379
-Wunreachable-code */
380
if(ret == NULL)
363
static const char * safer_gnutls_strerror (int value) {
364
const char *ret = gnutls_strerror (value); /* Spurious warning */
365
if (ret == NULL)
381
366
ret = "(unknown)";
382
367
return ret;
383
368
}
388
373
fprintf(stderr, "GnuTLS: %s", string);
389
374
}
390
375
391
static int init_gnutls_global(const char *pubkeyfilename,
376
static int init_gnutls_global(mandos_context *mc,
377
const char *pubkeyfilename,
392
378
const char *seckeyfilename){
393
379
int ret;
394
380
397
383
}
398
384
399
385
ret = gnutls_global_init();
400
if(ret != GNUTLS_E_SUCCESS){
401
fprintf(stderr, "GnuTLS global_init: %s\n",
402
safer_gnutls_strerror(ret));
386
if (ret != GNUTLS_E_SUCCESS) {
387
fprintf (stderr, "GnuTLS global_init: %s\n",
388
safer_gnutls_strerror(ret));
403
389
return -1;
404
390
}
405
391
406
if(debug){
392
if (debug){
407
393
/* "Use a log level over 10 to enable all debugging options."
408
394
* - GnuTLS manual
409
395
*/
412
398
}
413
399
414
400
/* OpenPGP credentials */
415
gnutls_certificate_allocate_credentials(&mc.cred);
416
if(ret != GNUTLS_E_SUCCESS){
417
fprintf(stderr, "GnuTLS memory error: %s\n", /* Spurious warning
418
from
419
-Wunreachable-code
420
*/
421
safer_gnutls_strerror(ret));
422
gnutls_global_deinit();
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 ();
423
407
return -1;
424
408
}
425
409
430
414
}
431
415
432
416
ret = gnutls_certificate_set_openpgp_key_file
433
(mc.cred, pubkeyfilename, seckeyfilename,
417
(mc->cred, pubkeyfilename, seckeyfilename,
434
418
GNUTLS_OPENPGP_FMT_BASE64);
435
if(ret != GNUTLS_E_SUCCESS){
419
if (ret != GNUTLS_E_SUCCESS) {
436
420
fprintf(stderr,
437
421
"Error[%d] while reading the OpenPGP key pair ('%s',"
438
422
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
442
426
}
443
427
444
428
/* GnuTLS server initialization */
445
ret = gnutls_dh_params_init(&mc.dh_params);
446
if(ret != GNUTLS_E_SUCCESS){
447
fprintf(stderr, "Error in GnuTLS DH parameter initialization:"
448
" %s\n", safer_gnutls_strerror(ret));
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));
449
433
goto globalfail;
450
434
}
451
ret = gnutls_dh_params_generate2(mc.dh_params, mc.dh_bits);
452
if(ret != GNUTLS_E_SUCCESS){
453
fprintf(stderr, "Error in GnuTLS prime generation: %s\n",
454
safer_gnutls_strerror(ret));
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));
455
439
goto globalfail;
456
440
}
457
441
458
gnutls_certificate_set_dh_params(mc.cred, mc.dh_params);
442
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
459
443
460
444
return 0;
461
445
462
446
globalfail:
463
447
464
gnutls_certificate_free_credentials(mc.cred);
448
gnutls_certificate_free_credentials(mc->cred);
465
449
gnutls_global_deinit();
466
gnutls_dh_params_deinit(mc.dh_params);
450
gnutls_dh_params_deinit(mc->dh_params);
467
451
return -1;
468
452
}
469
453
470
static int init_gnutls_session(gnutls_session_t *session){
454
static int init_gnutls_session(mandos_context *mc,
455
gnutls_session_t *session){
471
456
int ret;
472
457
/* GnuTLS session creation */
473
458
ret = gnutls_init(session, GNUTLS_SERVER);
474
if(ret != GNUTLS_E_SUCCESS){
459
if (ret != GNUTLS_E_SUCCESS){
475
460
fprintf(stderr, "Error in GnuTLS session initialization: %s\n",
476
461
safer_gnutls_strerror(ret));
477
462
}
478
463
479
464
{
480
465
const char *err;
481
ret = gnutls_priority_set_direct(*session, mc.priority, &err);
482
if(ret != GNUTLS_E_SUCCESS){
466
ret = gnutls_priority_set_direct(*session, mc->priority, &err);
467
if (ret != GNUTLS_E_SUCCESS) {
483
468
fprintf(stderr, "Syntax error at: %s\n", err);
484
469
fprintf(stderr, "GnuTLS error: %s\n",
485
470
safer_gnutls_strerror(ret));
486
gnutls_deinit(*session);
471
gnutls_deinit (*session);
487
472
return -1;
488
473
}
489
474
}
490
475
491
476
ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,
492
mc.cred);
493
if(ret != GNUTLS_E_SUCCESS){
477
mc->cred);
478
if (ret != GNUTLS_E_SUCCESS) {
494
479
fprintf(stderr, "Error setting GnuTLS credentials: %s\n",
495
480
safer_gnutls_strerror(ret));
496
gnutls_deinit(*session);
481
gnutls_deinit (*session);
497
482
return -1;
498
483
}
499
484
500
485
/* ignore client certificate if any. */
501
gnutls_certificate_server_set_request(*session,
502
GNUTLS_CERT_IGNORE);
486
gnutls_certificate_server_set_request (*session,
487
GNUTLS_CERT_IGNORE);
503
488
504
gnutls_dh_set_prime_bits(*session, mc.dh_bits);
489
gnutls_dh_set_prime_bits (*session, mc->dh_bits);
505
490
506
491
return 0;
507
492
}
513
498
/* Called when a Mandos server is found */
514
499
static int start_mandos_communication(const char *ip, uint16_t port,
515
500
AvahiIfIndex if_index,
516
int af){
501
mandos_context *mc){
517
502
int ret, tcp_sd;
518
ssize_t sret;
519
union {
520
struct sockaddr_in in;
521
struct sockaddr_in6 in6;
522
} to;
503
union { struct sockaddr in; struct sockaddr_in6 in6; } to;
523
504
char *buffer = NULL;
524
505
char *decrypted_buffer;
525
506
size_t buffer_length = 0;
527
508
ssize_t decrypted_buffer_size;
528
509
size_t written;
529
510
int retval = 0;
511
char interface[IF_NAMESIZE];
530
512
gnutls_session_t session;
531
int pf; /* Protocol family */
532
533
switch(af){
534
case AF_INET6:
535
pf = PF_INET6;
536
break;
537
case AF_INET:
538
pf = PF_INET;
539
break;
540
default:
541
fprintf(stderr, "Bad address family: %d\n", af);
542
return -1;
543
}
544
545
ret = init_gnutls_session(&session);
546
if(ret != 0){
513
514
ret = init_gnutls_session (mc, &session);
515
if (ret != 0){
547
516
return -1;
548
517
}
549
518
550
519
if(debug){
551
fprintf(stderr, "Setting up a TCP connection to %s, port %" PRIu16
520
fprintf(stderr, "Setting up a tcp connection to %s, port %" PRIu16
552
521
"\n", ip, port);
553
522
}
554
523
555
tcp_sd = socket(pf, SOCK_STREAM, 0);
556
if(tcp_sd < 0){
524
tcp_sd = socket(PF_INET6, SOCK_STREAM, 0);
525
if(tcp_sd < 0) {
557
526
perror("socket");
558
527
return -1;
559
528
}
560
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
561
538
memset(&to, 0, sizeof(to));
562
if(af == AF_INET6){
563
to.in6.sin6_family = (uint16_t)af;
564
ret = inet_pton(af, ip, &to.in6.sin6_addr);
565
} else { /* IPv4 */
566
to.in.sin_family = (sa_family_t)af;
567
ret = inet_pton(af, ip, &to.in.sin_addr);
568
}
569
if(ret < 0 ){
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 ){
570
544
perror("inet_pton");
571
545
return -1;
572
546
}
574
548
fprintf(stderr, "Bad address: %s\n", ip);
575
549
return -1;
576
550
}
577
if(af == AF_INET6){
578
to.in6.sin6_port = htons(port); /* Spurious warnings from
579
-Wconversion and
580
-Wunreachable-code */
581
582
if(IN6_IS_ADDR_LINKLOCAL /* Spurious warnings from */
583
(&to.in6.sin6_addr)){ /* -Wstrict-aliasing=2 or lower and
584
-Wunreachable-code*/
585
if(if_index == AVAHI_IF_UNSPEC){
586
fprintf(stderr, "An IPv6 link-local address is incomplete"
587
" without a network interface\n");
588
return -1;
589
}
590
/* Set the network interface number as scope */
591
to.in6.sin6_scope_id = (uint32_t)if_index;
592
}
593
} else {
594
to.in.sin_port = htons(port); /* Spurious warnings from
595
-Wconversion and
596
-Wunreachable-code */
597
}
551
to.in6.sin6_port = htons(port); /* Spurious warning */
552
553
to.in6.sin6_scope_id = (uint32_t)if_index;
598
554
599
555
if(debug){
600
if(af == AF_INET6 and if_index != AVAHI_IF_UNSPEC){
601
char interface[IF_NAMESIZE];
602
if(if_indextoname((unsigned int)if_index, interface) == NULL){
603
perror("if_indextoname");
604
} else {
605
fprintf(stderr, "Connection to: %s%%%s, port %" PRIu16 "\n",
606
ip, interface, port);
607
}
608
} else {
609
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
610
port);
611
}
612
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
613
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
614
const char *pcret;
615
if(af == AF_INET6){
616
pcret = inet_ntop(af, &(to.in6.sin6_addr), addrstr,
617
sizeof(addrstr));
618
} else {
619
pcret = inet_ntop(af, &(to.in.sin_addr), addrstr,
620
sizeof(addrstr));
621
}
622
if(pcret == NULL){
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){
623
561
perror("inet_ntop");
624
562
} else {
625
563
if(strcmp(addrstr, ip) != 0){
628
566
}
629
567
}
630
568
631
if(af == AF_INET6){
632
ret = connect(tcp_sd, &to.in6, sizeof(to));
633
} else {
634
ret = connect(tcp_sd, &to.in, sizeof(to)); /* IPv4 */
635
}
636
if(ret < 0){
569
ret = connect(tcp_sd, &to.in, sizeof(to));
570
if (ret < 0){
637
571
perror("connect");
638
572
return -1;
639
573
}
640
574
641
575
const char *out = mandos_protocol_version;
642
576
written = 0;
643
while(true){
577
while (true){
644
578
size_t out_size = strlen(out);
645
ret = (int)TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
579
ret = TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
646
580
out_size - written));
647
if(ret == -1){
581
if (ret == -1){
648
582
perror("write");
649
583
retval = -1;
650
584
goto mandos_end;
653
587
if(written < out_size){
654
588
continue;
655
589
} else {
656
if(out == mandos_protocol_version){
590
if (out == mandos_protocol_version){
657
591
written = 0;
658
592
out = "\r\n";
659
593
} else {
666
600
fprintf(stderr, "Establishing TLS session with %s\n", ip);
667
601
}
668
602
669
gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t) tcp_sd);
603
gnutls_transport_set_ptr (session, (gnutls_transport_ptr_t) tcp_sd);
670
604
671
605
do{
672
ret = gnutls_handshake(session);
606
ret = gnutls_handshake (session);
673
607
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
674
608
675
if(ret != GNUTLS_E_SUCCESS){
609
if (ret != GNUTLS_E_SUCCESS){
676
610
if(debug){
677
611
fprintf(stderr, "*** GnuTLS Handshake failed ***\n");
678
gnutls_perror(ret);
612
gnutls_perror (ret);
679
613
}
680
614
retval = -1;
681
615
goto mandos_end;
684
618
/* Read OpenPGP packet that contains the wanted password */
685
619
686
620
if(debug){
687
fprintf(stderr, "Retrieving OpenPGP encrypted password from %s\n",
621
fprintf(stderr, "Retrieving pgp encrypted password from %s\n",
688
622
ip);
689
623
}
690
624
691
625
while(true){
692
buffer_capacity = incbuffer(&buffer, buffer_length,
626
buffer_capacity = adjustbuffer(&buffer, buffer_length,
693
627
buffer_capacity);
694
if(buffer_capacity == 0){
695
perror("incbuffer");
628
if (buffer_capacity == 0){
629
perror("adjustbuffer");
696
630
retval = -1;
697
631
goto mandos_end;
698
632
}
699
633
700
sret = gnutls_record_recv(session, buffer+buffer_length,
701
BUFFER_SIZE);
702
if(sret == 0){
634
ret = gnutls_record_recv(session, buffer+buffer_length,
635
BUFFER_SIZE);
636
if (ret == 0){
703
637
break;
704
638
}
705
if(sret < 0){
706
switch(sret){
639
if (ret < 0){
640
switch(ret){
707
641
case GNUTLS_E_INTERRUPTED:
708
642
case GNUTLS_E_AGAIN:
709
643
break;
710
644
case GNUTLS_E_REHANDSHAKE:
711
645
do{
712
ret = gnutls_handshake(session);
646
ret = gnutls_handshake (session);
713
647
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
714
if(ret < 0){
648
if (ret < 0){
715
649
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
716
gnutls_perror(ret);
650
gnutls_perror (ret);
717
651
retval = -1;
718
652
goto mandos_end;
719
653
}
722
656
fprintf(stderr, "Unknown error while reading data from"
723
657
" encrypted session with Mandos server\n");
724
658
retval = -1;
725
gnutls_bye(session, GNUTLS_SHUT_RDWR);
659
gnutls_bye (session, GNUTLS_SHUT_RDWR);
726
660
goto mandos_end;
727
661
}
728
662
} else {
729
buffer_length += (size_t) sret;
663
buffer_length += (size_t) ret;
730
664
}
731
665
}
732
666
734
668
fprintf(stderr, "Closing TLS session\n");
735
669
}
736
670
737
gnutls_bye(session, GNUTLS_SHUT_RDWR);
671
gnutls_bye (session, GNUTLS_SHUT_RDWR);
738
672
739
if(buffer_length > 0){
740
decrypted_buffer_size = pgp_packet_decrypt(buffer,
673
if (buffer_length > 0){
674
decrypted_buffer_size = pgp_packet_decrypt(mc, buffer,
741
675
buffer_length,
742
676
&decrypted_buffer);
743
if(decrypted_buffer_size >= 0){
677
if (decrypted_buffer_size >= 0){
744
678
written = 0;
745
679
while(written < (size_t) decrypted_buffer_size){
746
ret = (int)fwrite(decrypted_buffer + written, 1,
747
(size_t)decrypted_buffer_size - written,
748
stdout);
680
ret = (int)fwrite (decrypted_buffer + written, 1,
681
(size_t)decrypted_buffer_size - written,
682
stdout);
749
683
if(ret == 0 and ferror(stdout)){
750
684
if(debug){
751
685
fprintf(stderr, "Error writing encrypted data: %s\n",
768
702
769
703
mandos_end:
770
704
free(buffer);
771
ret = (int)TEMP_FAILURE_RETRY(close(tcp_sd));
705
ret = TEMP_FAILURE_RETRY(close(tcp_sd));
772
706
if(ret == -1){
773
707
perror("close");
774
708
}
775
gnutls_deinit(session);
709
gnutls_deinit (session);
776
710
return retval;
777
711
}
778
712
779
713
static void resolve_callback(AvahiSServiceResolver *r,
780
714
AvahiIfIndex interface,
781
AvahiProtocol proto,
715
AVAHI_GCC_UNUSED AvahiProtocol protocol,
782
716
AvahiResolverEvent event,
783
717
const char *name,
784
718
const char *type,
789
723
AVAHI_GCC_UNUSED AvahiStringList *txt,
790
724
AVAHI_GCC_UNUSED AvahiLookupResultFlags
791
725
flags,
792
AVAHI_GCC_UNUSED void* userdata){
726
void* userdata) {
727
mandos_context *mc = userdata;
793
728
assert(r);
794
729
795
730
/* Called whenever a service has been resolved successfully or
796
731
timed out */
797
732
798
switch(event){
733
switch (event) {
799
734
default:
800
735
case AVAHI_RESOLVER_FAILURE:
801
736
fprintf(stderr, "(Avahi Resolver) Failed to resolve service '%s'"
802
737
" of type '%s' in domain '%s': %s\n", name, type, domain,
803
avahi_strerror(avahi_server_errno(mc.server)));
738
avahi_strerror(avahi_server_errno(mc->server)));
804
739
break;
805
740
806
741
case AVAHI_RESOLVER_FOUND:
809
744
avahi_address_snprint(ip, sizeof(ip), address);
810
745
if(debug){
811
746
fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %"
812
PRIdMAX ") on port %" PRIu16 "\n", name, host_name,
813
ip, (intmax_t)interface, port);
747
PRIu16 ") on port %d\n", name, host_name, ip,
748
interface, port);
814
749
}
815
int ret = start_mandos_communication(ip, port, interface,
816
avahi_proto_to_af(proto));
817
if(ret == 0){
818
avahi_simple_poll_quit(mc.simple_poll);
750
int ret = start_mandos_communication(ip, port, interface, mc);
751
if (ret == 0){
752
avahi_simple_poll_quit(mc->simple_poll);
819
753
}
820
754
}
821
755
}
822
756
avahi_s_service_resolver_free(r);
823
757
}
824
758
825
static void browse_callback(AvahiSServiceBrowser *b,
826
AvahiIfIndex interface,
827
AvahiProtocol protocol,
828
AvahiBrowserEvent event,
829
const char *name,
830
const char *type,
831
const char *domain,
832
AVAHI_GCC_UNUSED AvahiLookupResultFlags
833
flags,
834
AVAHI_GCC_UNUSED void* userdata){
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;
835
770
assert(b);
836
771
837
772
/* Called whenever a new services becomes available on the LAN or
838
773
is removed from the LAN */
839
774
840
switch(event){
775
switch (event) {
841
776
default:
842
777
case AVAHI_BROWSER_FAILURE:
843
778
844
779
fprintf(stderr, "(Avahi browser) %s\n",
845
avahi_strerror(avahi_server_errno(mc.server)));
846
avahi_simple_poll_quit(mc.simple_poll);
780
avahi_strerror(avahi_server_errno(mc->server)));
781
avahi_simple_poll_quit(mc->simple_poll);
847
782
return;
848
783
849
784
case AVAHI_BROWSER_NEW:
852
787
the callback function is called the Avahi server will free the
853
788
resolver for us. */
854
789
855
if(!(avahi_s_service_resolver_new(mc.server, interface,
790
if (!(avahi_s_service_resolver_new(mc->server, interface,
856
791
protocol, name, type, domain,
857
792
AVAHI_PROTO_INET6, 0,
858
resolve_callback, NULL)))
793
resolve_callback, mc)))
859
794
fprintf(stderr, "Avahi: Failed to resolve service '%s': %s\n",
860
name, avahi_strerror(avahi_server_errno(mc.server)));
795
name, avahi_strerror(avahi_server_errno(mc->server)));
861
796
break;
862
797
863
798
case AVAHI_BROWSER_REMOVE:
872
807
}
873
808
}
874
809
875
sig_atomic_t quit_now = 0;
876
877
static void handle_sigterm(__attribute__((unused)) int sig){
878
if(quit_now){
879
return;
880
}
881
quit_now = 1;
882
int old_errno = errno;
883
if(mc.simple_poll != NULL){
884
avahi_simple_poll_quit(mc.simple_poll);
885
}
886
errno = old_errno;
887
}
888
889
810
int main(int argc, char *argv[]){
890
AvahiSServiceBrowser *sb = NULL;
891
int error;
892
int ret;
893
intmax_t tmpmax;
894
int numchars;
895
int exitcode = EXIT_SUCCESS;
896
const char *interface = "eth0";
897
struct ifreq network;
898
int sd;
899
uid_t uid;
900
gid_t gid;
901
char *connect_to = NULL;
902
char tempdir[] = "/tmp/mandosXXXXXX";
903
bool tempdir_created = false;
904
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
905
const char *seckey = PATHDIR "/" SECKEY;
906
const char *pubkey = PATHDIR "/" PUBKEY;
907
908
/* Initialize Mandos context */
909
mc = (mandos_context){ .simple_poll = NULL, .server = NULL,
910
.dh_bits = 1024, .priority = "SECURE256"
911
":!CTYPE-X.509:+CTYPE-OPENPGP" };
912
bool gnutls_initialized = false;
913
bool gpgme_initialized = false;
914
double delay = 2.5;
915
916
struct sigaction old_sigterm_action;
917
struct sigaction sigterm_action = { .sa_handler = handle_sigterm };
918
919
{
920
struct argp_option options[] = {
921
{ .name = "debug", .key = 128,
922
.doc = "Debug mode", .group = 3 },
923
{ .name = "connect", .key = 'c',
924
.arg = "ADDRESS:PORT",
925
.doc = "Connect directly to a specific Mandos server",
926
.group = 1 },
927
{ .name = "interface", .key = 'i',
928
.arg = "NAME",
929
.doc = "Network interface that will be used to search for"
930
" Mandos servers",
931
.group = 1 },
932
{ .name = "seckey", .key = 's',
933
.arg = "FILE",
934
.doc = "OpenPGP secret key file base name",
935
.group = 1 },
936
{ .name = "pubkey", .key = 'p',
937
.arg = "FILE",
938
.doc = "OpenPGP public key file base name",
939
.group = 2 },
940
{ .name = "dh-bits", .key = 129,
941
.arg = "BITS",
942
.doc = "Bit length of the prime number used in the"
943
" Diffie-Hellman key exchange",
944
.group = 2 },
945
{ .name = "priority", .key = 130,
946
.arg = "STRING",
947
.doc = "GnuTLS priority string for the TLS handshake",
948
.group = 1 },
949
{ .name = "delay", .key = 131,
950
.arg = "SECONDS",
951
.doc = "Maximum delay to wait for interface startup",
952
.group = 2 },
953
{ .name = NULL }
954
};
955
956
error_t parse_opt(int key, char *arg,
957
struct argp_state *state){
958
switch(key){
959
case 128: /* --debug */
960
debug = true;
961
break;
962
case 'c': /* --connect */
963
connect_to = arg;
964
break;
965
case 'i': /* --interface */
966
interface = arg;
967
break;
968
case 's': /* --seckey */
969
seckey = arg;
970
break;
971
case 'p': /* --pubkey */
972
pubkey = arg;
973
break;
974
case 129: /* --dh-bits */
975
ret = sscanf(arg, "%" SCNdMAX "%n", &tmpmax, &numchars);
976
if(ret < 1 or tmpmax != (typeof(mc.dh_bits))tmpmax
977
or arg[numchars] != '\0'){
978
fprintf(stderr, "Bad number of DH bits\n");
979
exit(EXIT_FAILURE);
980
}
981
mc.dh_bits = (typeof(mc.dh_bits))tmpmax;
982
break;
983
case 130: /* --priority */
984
mc.priority = arg;
985
break;
986
case 131: /* --delay */
987
ret = sscanf(arg, "%lf%n", &delay, &numchars);
988
if(ret < 1 or arg[numchars] != '\0'){
989
fprintf(stderr, "Bad delay\n");
990
exit(EXIT_FAILURE);
991
}
992
break;
993
case ARGP_KEY_ARG:
994
argp_usage(state);
995
case ARGP_KEY_END:
996
break;
997
default:
998
return ARGP_ERR_UNKNOWN;
999
}
1000
return 0;
1001
}
1002
1003
struct argp argp = { .options = options, .parser = parse_opt,
1004
.args_doc = "",
1005
.doc = "Mandos client -- Get and decrypt"
1006
" passwords from a Mandos server" };
1007
ret = argp_parse(&argp, argc, argv, 0, 0, NULL);
1008
if(ret == ARGP_ERR_UNKNOWN){
1009
fprintf(stderr, "Unknown error while parsing arguments\n");
1010
exitcode = EXIT_FAILURE;
1011
goto end;
1012
}
1013
}
1014
1015
/* If the interface is down, bring it up */
1016
if(interface[0] != '\0'){
1017
#ifdef __linux__
1018
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1019
messages to mess up the prompt */
1020
ret = klogctl(8, NULL, 5);
1021
bool restore_loglevel = true;
1022
if(ret == -1){
1023
restore_loglevel = false;
1024
perror("klogctl");
1025
}
1026
#endif /* __linux__ */
1027
1028
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1029
if(sd < 0){
1030
perror("socket");
1031
exitcode = EXIT_FAILURE;
1032
#ifdef __linux__
1033
if(restore_loglevel){
1034
ret = klogctl(7, NULL, 0);
1035
if(ret == -1){
1036
perror("klogctl");
1037
}
1038
}
1039
#endif /* __linux__ */
1040
goto end;
1041
}
1042
strcpy(network.ifr_name, interface);
1043
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1044
if(ret == -1){
1045
perror("ioctl SIOCGIFFLAGS");
1046
#ifdef __linux__
1047
if(restore_loglevel){
1048
ret = klogctl(7, NULL, 0);
1049
if(ret == -1){
1050
perror("klogctl");
1051
}
1052
}
1053
#endif /* __linux__ */
1054
exitcode = EXIT_FAILURE;
1055
goto end;
1056
}
1057
if((network.ifr_flags & IFF_UP) == 0){
1058
network.ifr_flags |= IFF_UP;
1059
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1060
if(ret == -1){
1061
perror("ioctl SIOCSIFFLAGS");
1062
exitcode = EXIT_FAILURE;
1063
#ifdef __linux__
1064
if(restore_loglevel){
1065
ret = klogctl(7, NULL, 0);
1066
if(ret == -1){
1067
perror("klogctl");
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);
1068
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;
1069
902
}
1070
#endif /* __linux__ */
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;
1071
914
goto end;
1072
915
}
1073
916
}
1074
/* sleep checking until interface is running */
1075
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);
1076
927
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1077
928
if(ret == -1){
1078
929
perror("ioctl SIOCGIFFLAGS");
1079
} else if(network.ifr_flags & IFF_RUNNING){
1080
break;
1081
}
1082
struct timespec sleeptime = { .tv_nsec = 250000000 };
1083
ret = nanosleep(&sleeptime, NULL);
1084
if(ret == -1 and errno != EINTR){
1085
perror("nanosleep");
1086
}
1087
}
1088
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1089
if(ret == -1){
1090
perror("close");
1091
}
1092
#ifdef __linux__
1093
if(restore_loglevel){
1094
/* Restores kernel loglevel to default */
1095
ret = klogctl(7, NULL, 0);
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));
1096
943
if(ret == -1){
1097
perror("klogctl");
944
perror("close");
1098
945
}
1099
946
}
1100
#endif /* __linux__ */
1101
}
1102
1103
uid = getuid();
1104
gid = getgid();
1105
1106
errno = 0;
1107
setgid(gid);
1108
if(ret == -1){
1109
perror("setgid");
1110
}
1111
1112
ret = setuid(uid);
1113
if(ret == -1){
1114
perror("setuid");
1115
}
1116
1117
ret = init_gnutls_global(pubkey, seckey);
1118
if(ret == -1){
1119
fprintf(stderr, "init_gnutls_global failed\n");
1120
exitcode = EXIT_FAILURE;
1121
goto end;
1122
} else {
1123
gnutls_initialized = true;
1124
}
1125
1126
if(mkdtemp(tempdir) == NULL){
1127
perror("mkdtemp");
1128
goto end;
1129
}
1130
tempdir_created = true;
1131
1132
if(not init_gpgme(pubkey, seckey, tempdir)){
1133
fprintf(stderr, "init_gpgme failed\n");
1134
exitcode = EXIT_FAILURE;
1135
goto end;
1136
} else {
1137
gpgme_initialized = true;
1138
}
1139
1140
if(interface[0] != '\0'){
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
1141
984
if_index = (AvahiIfIndex) if_nametoindex(interface);
1142
985
if(if_index == 0){
1143
986
fprintf(stderr, "No such interface: \"%s\"\n", interface);
1144
exitcode = EXIT_FAILURE;
1145
goto end;
1146
}
1147
}
1148
1149
if(connect_to != NULL){
1150
/* Connect directly, do not use Zeroconf */
1151
/* (Mainly meant for debugging) */
1152
char *address = strrchr(connect_to, ':');
1153
if(address == NULL){
1154
fprintf(stderr, "No colon in address\n");
1155
exitcode = EXIT_FAILURE;
1156
goto end;
1157
}
1158
uint16_t port;
1159
ret = sscanf(address+1, "%" SCNdMAX "%n", &tmpmax, &numchars);
1160
if(ret < 1 or tmpmax != (uint16_t)tmpmax
1161
or address[numchars+1] != '\0'){
1162
fprintf(stderr, "Bad port number\n");
1163
exitcode = EXIT_FAILURE;
1164
goto end;
1165
}
1166
port = (uint16_t)tmpmax;
1167
*address = '\0';
1168
address = connect_to;
1169
/* Colon in address indicates IPv6 */
1170
int af;
1171
if(strchr(address, ':') != NULL){
1172
af = AF_INET6;
1173
} else {
1174
af = AF_INET;
1175
}
1176
ret = start_mandos_communication(address, port, if_index, af);
1177
if(ret < 0){
1178
exitcode = EXIT_FAILURE;
1179
} else {
1180
exitcode = EXIT_SUCCESS;
1181
}
1182
goto end;
1183
}
1184
1185
if(not debug){
1186
avahi_set_log_function(empty_log);
1187
}
1188
1189
/* Initialize the pseudo-RNG for Avahi */
1190
srand((unsigned int) time(NULL));
1191
1192
/* Allocate main Avahi loop object */
1193
mc.simple_poll = avahi_simple_poll_new();
1194
if(mc.simple_poll == NULL){
1195
fprintf(stderr, "Avahi: Failed to create simple poll object.\n");
1196
exitcode = EXIT_FAILURE;
1197
goto end;
1198
}
1199
1200
{
1201
AvahiServerConfig config;
1202
/* Do not publish any local Zeroconf records */
1203
avahi_server_config_init(&config);
1204
config.publish_hinfo = 0;
1205
config.publish_addresses = 0;
1206
config.publish_workstation = 0;
1207
config.publish_domain = 0;
1208
1209
/* Allocate a new server */
1210
mc.server = avahi_server_new(avahi_simple_poll_get
1211
(mc.simple_poll), &config, NULL,
1212
NULL, &error);
1213
1214
/* Free the Avahi configuration data */
1215
avahi_server_config_free(&config);
1216
}
1217
1218
/* Check if creating the Avahi server object succeeded */
1219
if(mc.server == NULL){
1220
fprintf(stderr, "Failed to create Avahi server: %s\n",
1221
avahi_strerror(error));
1222
exitcode = EXIT_FAILURE;
1223
goto end;
1224
}
1225
1226
/* Create the Avahi service browser */
1227
sb = avahi_s_service_browser_new(mc.server, if_index,
1228
AVAHI_PROTO_INET6, "_mandos._tcp",
1229
NULL, 0, browse_callback, NULL);
1230
if(sb == NULL){
1231
fprintf(stderr, "Failed to create service browser: %s\n",
1232
avahi_strerror(avahi_server_errno(mc.server)));
1233
exitcode = EXIT_FAILURE;
1234
goto end;
1235
}
1236
1237
sigemptyset(&sigterm_action.sa_mask);
1238
ret = sigaddset(&sigterm_action.sa_mask, SIGINT);
1239
if(ret == -1){
1240
perror("sigaddset");
1241
exitcode = EXIT_FAILURE;
1242
goto end;
1243
}
1244
ret = sigaddset(&sigterm_action.sa_mask, SIGHUP);
1245
if(ret == -1){
1246
perror("sigaddset");
1247
exitcode = EXIT_FAILURE;
1248
goto end;
1249
}
1250
ret = sigaddset(&sigterm_action.sa_mask, SIGTERM);
1251
if(ret == -1){
1252
perror("sigaddset");
1253
exitcode = EXIT_FAILURE;
1254
goto end;
1255
}
1256
ret = sigaction(SIGTERM, &sigterm_action, &old_sigterm_action);
1257
if(ret == -1){
1258
perror("sigaction");
1259
exitcode = EXIT_FAILURE;
1260
goto end;
1261
}
1262
1263
/* Run the main loop */
1264
1265
if(debug){
1266
fprintf(stderr, "Starting Avahi loop search\n");
1267
}
1268
1269
avahi_simple_poll_loop(mc.simple_poll);
1270
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
1271
1079
end:
1272
1273
if(debug){
1274
fprintf(stderr, "%s exiting\n", argv[0]);
1275
}
1276
1277
/* Cleanup things */
1278
if(sb != NULL)
1279
avahi_s_service_browser_free(sb);
1280
1281
if(mc.server != NULL)
1282
avahi_server_free(mc.server);
1283
1284
if(mc.simple_poll != NULL)
1285
avahi_simple_poll_free(mc.simple_poll);
1286
1287
if(gnutls_initialized){
1288
gnutls_certificate_free_credentials(mc.cred);
1289
gnutls_global_deinit();
1290
gnutls_dh_params_deinit(mc.dh_params);
1291
}
1292
1293
if(gpgme_initialized){
1294
gpgme_release(mc.ctx);
1295
}
1296
1297
/* Removes the temp directory used by GPGME */
1298
if(tempdir_created){
1299
DIR *d;
1300
struct dirent *direntry;
1301
d = opendir(tempdir);
1302
if(d == NULL){
1303
if(errno != ENOENT){
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){
1304
1111
perror("opendir");
1305
}
1306
} else {
1307
while(true){
1308
direntry = readdir(d);
1309
if(direntry == NULL){
1310
break;
1311
}
1312
/* Skip "." and ".." */
1313
if(direntry->d_name[0] == '.'
1314
and (direntry->d_name[1] == '\0'
1315
or (direntry->d_name[1] == '.'
1316
and direntry->d_name[2] == '\0'))){
1317
continue;
1318
}
1319
char *fullname = NULL;
1320
ret = asprintf(&fullname, "%s/%s", tempdir,
1321
direntry->d_name);
1322
if(ret < 0){
1323
perror("asprintf");
1324
continue;
1325
}
1326
ret = remove(fullname);
1327
if(ret == -1){
1328
fprintf(stderr, "remove(\"%s\"): %s\n", fullname,
1329
strerror(errno));
1330
}
1331
free(fullname);
1332
}
1333
closedir(d);
1334
}
1335
ret = rmdir(tempdir);
1336
if(ret == -1 and errno != ENOENT){
1337
perror("rmdir");
1338
}
1339
}
1340
1341
return exitcode;
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;
1342
1143
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0