To get this branch, use:
bzr branch
http://bzr.recompile.se/loggerhead/mandos/trunk
« back to all changes in this revision
Viewing changes to plugins.d/mandos-client.c
- browse files at revision 24.1.135
- compare with another revision
- download diff
- download tarball
- view history from revision 24.1.135
- Committer: Björn Påhlsson
- Date: 2009-02-09 18:15:18 UTC
- mto: (24.1.154 mandos) (237.4.3 mandos-release)
- mto: This revision was merged to the branch mainline in revision 309.
- Revision ID: belorn@braxen-20090209181518-powtql91qv3wu51d
Earlier signal handling
- files added:
- NEWS
- debian/po
- files removed:
- etc-plugins.d-README
- files modified:
- .bzrignore
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 © 2007-2008 Teddy Hogeborn & Björn Påhlsson
12
* Copyright © 2008,2009 Teddy Hogeborn
13
* Copyright © 2008,2009 Björn Påhlsson
13
14
*
14
15
* This program is free software: you can redistribute it and/or
15
16
* modify it under the terms of the GNU General Public License as
35
36
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), asprintf() */
36
37
37
38
#include <stdio.h> /* fprintf(), stderr, fwrite(),
38
stdout, ferror() */
39
stdout, ferror(), sscanf(),
40
remove() */
39
41
#include <stdint.h> /* uint16_t, uint32_t */
40
42
#include <stddef.h> /* NULL, size_t, ssize_t */
41
43
#include <stdlib.h> /* free(), EXIT_SUCCESS, EXIT_FAILURE,
42
44
srand() */
43
#include <stdbool.h> /* bool, true */
45
#include <stdbool.h> /* bool, false, true */
44
46
#include <string.h> /* memset(), strcmp(), strlen(),
45
47
strerror(), asprintf(), strcpy() */
46
#include <sys/ioctl.h> /* ioctl */
48
#include <sys/ioctl.h> /* ioctl */
47
49
#include <sys/types.h> /* socket(), inet_pton(), sockaddr,
48
50
sockaddr_in6, PF_INET6,
49
SOCK_STREAM, INET6_ADDRSTRLEN,
50
uid_t, gid_t, open(), opendir(), DIR */
51
SOCK_STREAM, uid_t, gid_t, open(),
52
opendir(), DIR */
51
53
#include <sys/stat.h> /* open() */
52
54
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
53
struct in6_addr, inet_pton(),
54
connect() */
55
inet_pton(), connect() */
55
56
#include <fcntl.h> /* open() */
56
#include <dirent.h> /* opendir(), struct dirent, readdir() */
57
#include <inttypes.h> /* PRIu16 */
57
#include <dirent.h> /* opendir(), struct dirent, readdir()
58
*/
59
#include <inttypes.h> /* PRIu16, intmax_t, SCNdMAX */
58
60
#include <assert.h> /* assert() */
59
61
#include <errno.h> /* perror(), errno */
60
#include <time.h> /* time() */
62
#include <time.h> /* nanosleep(), time() */
61
63
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
62
64
SIOCSIFFLAGS, if_indextoname(),
63
65
if_nametoindex(), IF_NAMESIZE */
64
#include <netinet/in.h>
66
#include <netinet/in.h> /* IN6_IS_ADDR_LINKLOCAL,
67
INET_ADDRSTRLEN, INET6_ADDRSTRLEN
68
*/
65
69
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
66
70
getuid(), getgid(), setuid(),
67
71
setgid() */
68
72
#include <arpa/inet.h> /* inet_pton(), htons */
69
#include <iso646.h> /* not, and */
73
#include <iso646.h> /* not, or, and */
70
74
#include <argp.h> /* struct argp_option, error_t, struct
71
75
argp_state, struct argp,
72
76
argp_parse(), ARGP_KEY_ARG,
73
77
ARGP_KEY_END, ARGP_ERR_UNKNOWN */
78
#include <signal.h> /* sigemptyset(), sigaddset(), sigaction(), SIGTERM, sigaction */
79
#ifdef __linux__
80
#include <sys/klog.h> /* klogctl() */
81
#endif
74
82
75
83
/* Avahi */
76
84
/* All Avahi types, constants and functions
89
97
gnutls_*
90
98
init_gnutls_session(),
91
99
GNUTLS_* */
92
#include <gnutls/openpgp.h> /* gnutls_certificate_set_openpgp_key_file(),
100
#include <gnutls/openpgp.h>
101
/* gnutls_certificate_set_openpgp_key_file(),
93
102
GNUTLS_OPENPGP_FMT_BASE64 */
94
103
95
104
/* GPGME */
101
110
102
111
#define BUFFER_SIZE 256
103
112
104
/*
105
#define PATHDIR "/conf/conf.d/mandos"
106
*/
107
108
113
#define PATHDIR "/conf/conf.d/mandos"
109
114
#define SECKEY "seckey.txt"
110
115
#define PUBKEY "pubkey.txt"
111
116
112
117
bool debug = false;
113
118
static const char mandos_protocol_version[] = "1";
114
const char *argp_program_version = "mandos-client 1.0";
119
const char *argp_program_version = "mandos-client " VERSION;
115
120
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
116
121
117
122
/* Used for passing in values through the Avahi callback functions */
125
130
gpgme_ctx_t ctx;
126
131
} mandos_context;
127
132
133
/* global context so signal handler can reach it*/
134
mandos_context mc = { .simple_poll = NULL, .server = NULL,
135
.dh_bits = 1024, .priority = "SECURE256"
136
":!CTYPE-X.509:+CTYPE-OPENPGP" };
137
128
138
/*
129
* Make room in "buffer" for at least BUFFER_SIZE additional bytes.
130
* "buffer_capacity" is how much is currently allocated,
131
* "buffer_length" is how much is already used.
139
* Make additional room in "buffer" for at least BUFFER_SIZE
140
* additional bytes. "buffer_capacity" is how much is currently
141
* allocated, "buffer_length" is how much is already used.
132
142
*/
133
size_t adjustbuffer(char **buffer, size_t buffer_length,
143
size_t incbuffer(char **buffer, size_t buffer_length,
134
144
size_t buffer_capacity){
135
if (buffer_length + BUFFER_SIZE > buffer_capacity){
145
if(buffer_length + BUFFER_SIZE > buffer_capacity){
136
146
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
137
if (buffer == NULL){
147
if(buffer == NULL){
138
148
return 0;
139
149
}
140
150
buffer_capacity += BUFFER_SIZE;
145
155
/*
146
156
* Initialize GPGME.
147
157
*/
148
static bool init_gpgme(mandos_context *mc, const char *seckey,
158
static bool init_gpgme(const char *seckey,
149
159
const char *pubkey, const char *tempdir){
150
160
int ret;
151
161
gpgme_error_t rc;
153
163
154
164
155
165
/*
156
* Helper function to insert pub and seckey to the enigne keyring.
166
* Helper function to insert pub and seckey to the engine keyring.
157
167
*/
158
168
bool import_key(const char *filename){
159
169
int fd;
160
170
gpgme_data_t pgp_data;
161
171
162
fd = TEMP_FAILURE_RETRY(open(filename, O_RDONLY));
172
fd = (int)TEMP_FAILURE_RETRY(open(filename, O_RDONLY));
163
173
if(fd == -1){
164
174
perror("open");
165
175
return false;
166
176
}
167
177
168
178
rc = gpgme_data_new_from_fd(&pgp_data, fd);
169
if (rc != GPG_ERR_NO_ERROR){
179
if(rc != GPG_ERR_NO_ERROR){
170
180
fprintf(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
171
181
gpgme_strsource(rc), gpgme_strerror(rc));
172
182
return false;
173
183
}
174
184
175
rc = gpgme_op_import(mc->ctx, pgp_data);
176
if (rc != GPG_ERR_NO_ERROR){
185
rc = gpgme_op_import(mc.ctx, pgp_data);
186
if(rc != GPG_ERR_NO_ERROR){
177
187
fprintf(stderr, "bad gpgme_op_import: %s: %s\n",
178
188
gpgme_strsource(rc), gpgme_strerror(rc));
179
189
return false;
180
190
}
181
191
182
ret = TEMP_FAILURE_RETRY(close(fd));
192
ret = (int)TEMP_FAILURE_RETRY(close(fd));
183
193
if(ret == -1){
184
194
perror("close");
185
195
}
187
197
return true;
188
198
}
189
199
190
if (debug){
200
if(debug){
191
201
fprintf(stderr, "Initialize gpgme\n");
192
202
}
193
203
194
204
/* Init GPGME */
195
205
gpgme_check_version(NULL);
196
206
rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
197
if (rc != GPG_ERR_NO_ERROR){
207
if(rc != GPG_ERR_NO_ERROR){
198
208
fprintf(stderr, "bad gpgme_engine_check_version: %s: %s\n",
199
209
gpgme_strsource(rc), gpgme_strerror(rc));
200
210
return false;
201
211
}
202
212
203
213
/* Set GPGME home directory for the OpenPGP engine only */
204
rc = gpgme_get_engine_info (&engine_info);
205
if (rc != GPG_ERR_NO_ERROR){
214
rc = gpgme_get_engine_info(&engine_info);
215
if(rc != GPG_ERR_NO_ERROR){
206
216
fprintf(stderr, "bad gpgme_get_engine_info: %s: %s\n",
207
217
gpgme_strsource(rc), gpgme_strerror(rc));
208
218
return false;
221
231
}
222
232
223
233
/* Create new GPGME "context" */
224
rc = gpgme_new(&(mc->ctx));
225
if (rc != GPG_ERR_NO_ERROR){
234
rc = gpgme_new(&(mc.ctx));
235
if(rc != GPG_ERR_NO_ERROR){
226
236
fprintf(stderr, "bad gpgme_new: %s: %s\n",
227
237
gpgme_strsource(rc), gpgme_strerror(rc));
228
238
return false;
229
239
}
230
240
231
if (not import_key(pubkey) or not import_key(seckey)){
241
if(not import_key(pubkey) or not import_key(seckey)){
232
242
return false;
233
243
}
234
244
239
249
* Decrypt OpenPGP data.
240
250
* Returns -1 on error
241
251
*/
242
static ssize_t pgp_packet_decrypt (const mandos_context *mc,
243
const char *cryptotext,
244
size_t crypto_size,
245
char **plaintext){
252
static ssize_t pgp_packet_decrypt(const char *cryptotext,
253
size_t crypto_size,
254
char **plaintext){
246
255
gpgme_data_t dh_crypto, dh_plain;
247
256
gpgme_error_t rc;
248
257
ssize_t ret;
249
258
size_t plaintext_capacity = 0;
250
259
ssize_t plaintext_length = 0;
251
260
252
if (debug){
261
if(debug){
253
262
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
254
263
}
255
264
256
265
/* Create new GPGME data buffer from memory cryptotext */
257
266
rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,
258
267
0);
259
if (rc != GPG_ERR_NO_ERROR){
268
if(rc != GPG_ERR_NO_ERROR){
260
269
fprintf(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
261
270
gpgme_strsource(rc), gpgme_strerror(rc));
262
271
return -1;
264
273
265
274
/* Create new empty GPGME data buffer for the plaintext */
266
275
rc = gpgme_data_new(&dh_plain);
267
if (rc != GPG_ERR_NO_ERROR){
276
if(rc != GPG_ERR_NO_ERROR){
268
277
fprintf(stderr, "bad gpgme_data_new: %s: %s\n",
269
278
gpgme_strsource(rc), gpgme_strerror(rc));
270
279
gpgme_data_release(dh_crypto);
273
282
274
283
/* Decrypt data from the cryptotext data buffer to the plaintext
275
284
data buffer */
276
rc = gpgme_op_decrypt(mc->ctx, dh_crypto, dh_plain);
277
if (rc != GPG_ERR_NO_ERROR){
285
rc = gpgme_op_decrypt(mc.ctx, dh_crypto, dh_plain);
286
if(rc != GPG_ERR_NO_ERROR){
278
287
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
279
288
gpgme_strsource(rc), gpgme_strerror(rc));
280
289
plaintext_length = -1;
281
if (debug){
290
if(debug){
282
291
gpgme_decrypt_result_t result;
283
result = gpgme_op_decrypt_result(mc->ctx);
284
if (result == NULL){
292
result = gpgme_op_decrypt_result(mc.ctx);
293
if(result == NULL){
285
294
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
286
295
} else {
287
296
fprintf(stderr, "Unsupported algorithm: %s\n",
314
323
}
315
324
316
325
/* Seek back to the beginning of the GPGME plaintext data buffer */
317
if (gpgme_data_seek(dh_plain, (off_t) 0, SEEK_SET) == -1){
326
if(gpgme_data_seek(dh_plain, (off_t)0, SEEK_SET) == -1){
318
327
perror("gpgme_data_seek");
319
328
plaintext_length = -1;
320
329
goto decrypt_end;
322
331
323
332
*plaintext = NULL;
324
333
while(true){
325
plaintext_capacity = adjustbuffer(plaintext,
334
plaintext_capacity = incbuffer(plaintext,
326
335
(size_t)plaintext_length,
327
336
plaintext_capacity);
328
if (plaintext_capacity == 0){
329
perror("adjustbuffer");
337
if(plaintext_capacity == 0){
338
perror("incbuffer");
330
339
plaintext_length = -1;
331
340
goto decrypt_end;
332
341
}
334
343
ret = gpgme_data_read(dh_plain, *plaintext + plaintext_length,
335
344
BUFFER_SIZE);
336
345
/* Print the data, if any */
337
if (ret == 0){
346
if(ret == 0){
338
347
/* EOF */
339
348
break;
340
349
}
364
373
return plaintext_length;
365
374
}
366
375
367
static const char * safer_gnutls_strerror (int value) {
368
const char *ret = gnutls_strerror (value); /* Spurious warning */
369
if (ret == NULL)
376
static const char * safer_gnutls_strerror(int value){
377
const char *ret = gnutls_strerror(value); /* Spurious warning from
378
-Wunreachable-code */
379
if(ret == NULL)
370
380
ret = "(unknown)";
371
381
return ret;
372
382
}
377
387
fprintf(stderr, "GnuTLS: %s", string);
378
388
}
379
389
380
static int init_gnutls_global(mandos_context *mc,
381
const char *pubkeyfilename,
390
static int init_gnutls_global(const char *pubkeyfilename,
382
391
const char *seckeyfilename){
383
392
int ret;
384
393
387
396
}
388
397
389
398
ret = gnutls_global_init();
390
if (ret != GNUTLS_E_SUCCESS) {
391
fprintf (stderr, "GnuTLS global_init: %s\n",
392
safer_gnutls_strerror(ret));
399
if(ret != GNUTLS_E_SUCCESS){
400
fprintf(stderr, "GnuTLS global_init: %s\n",
401
safer_gnutls_strerror(ret));
393
402
return -1;
394
403
}
395
404
396
if (debug){
405
if(debug){
397
406
/* "Use a log level over 10 to enable all debugging options."
398
407
* - GnuTLS manual
399
408
*/
402
411
}
403
412
404
413
/* OpenPGP credentials */
405
gnutls_certificate_allocate_credentials(&mc->cred);
406
if (ret != GNUTLS_E_SUCCESS){
407
fprintf (stderr, "GnuTLS memory error: %s\n", /* Spurious
408
warning */
409
safer_gnutls_strerror(ret));
410
gnutls_global_deinit ();
414
gnutls_certificate_allocate_credentials(&mc.cred);
415
if(ret != GNUTLS_E_SUCCESS){
416
fprintf(stderr, "GnuTLS memory error: %s\n", /* Spurious warning
417
from
418
-Wunreachable-code
419
*/
420
safer_gnutls_strerror(ret));
421
gnutls_global_deinit();
411
422
return -1;
412
423
}
413
424
418
429
}
419
430
420
431
ret = gnutls_certificate_set_openpgp_key_file
421
(mc->cred, pubkeyfilename, seckeyfilename,
432
(mc.cred, pubkeyfilename, seckeyfilename,
422
433
GNUTLS_OPENPGP_FMT_BASE64);
423
if (ret != GNUTLS_E_SUCCESS) {
434
if(ret != GNUTLS_E_SUCCESS){
424
435
fprintf(stderr,
425
436
"Error[%d] while reading the OpenPGP key pair ('%s',"
426
437
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
430
441
}
431
442
432
443
/* GnuTLS server initialization */
433
ret = gnutls_dh_params_init(&mc->dh_params);
434
if (ret != GNUTLS_E_SUCCESS) {
435
fprintf (stderr, "Error in GnuTLS DH parameter initialization:"
436
" %s\n", safer_gnutls_strerror(ret));
444
ret = gnutls_dh_params_init(&mc.dh_params);
445
if(ret != GNUTLS_E_SUCCESS){
446
fprintf(stderr, "Error in GnuTLS DH parameter initialization:"
447
" %s\n", safer_gnutls_strerror(ret));
437
448
goto globalfail;
438
449
}
439
ret = gnutls_dh_params_generate2(mc->dh_params, mc->dh_bits);
440
if (ret != GNUTLS_E_SUCCESS) {
441
fprintf (stderr, "Error in GnuTLS prime generation: %s\n",
442
safer_gnutls_strerror(ret));
450
ret = gnutls_dh_params_generate2(mc.dh_params, mc.dh_bits);
451
if(ret != GNUTLS_E_SUCCESS){
452
fprintf(stderr, "Error in GnuTLS prime generation: %s\n",
453
safer_gnutls_strerror(ret));
443
454
goto globalfail;
444
455
}
445
456
446
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
457
gnutls_certificate_set_dh_params(mc.cred, mc.dh_params);
447
458
448
459
return 0;
449
460
450
461
globalfail:
451
462
452
gnutls_certificate_free_credentials(mc->cred);
463
gnutls_certificate_free_credentials(mc.cred);
453
464
gnutls_global_deinit();
454
gnutls_dh_params_deinit(mc->dh_params);
465
gnutls_dh_params_deinit(mc.dh_params);
455
466
return -1;
456
467
}
457
468
458
static int init_gnutls_session(mandos_context *mc,
459
gnutls_session_t *session){
469
static int init_gnutls_session(gnutls_session_t *session){
460
470
int ret;
461
471
/* GnuTLS session creation */
462
472
ret = gnutls_init(session, GNUTLS_SERVER);
463
if (ret != GNUTLS_E_SUCCESS){
473
if(ret != GNUTLS_E_SUCCESS){
464
474
fprintf(stderr, "Error in GnuTLS session initialization: %s\n",
465
475
safer_gnutls_strerror(ret));
466
476
}
467
477
468
478
{
469
479
const char *err;
470
ret = gnutls_priority_set_direct(*session, mc->priority, &err);
471
if (ret != GNUTLS_E_SUCCESS) {
480
ret = gnutls_priority_set_direct(*session, mc.priority, &err);
481
if(ret != GNUTLS_E_SUCCESS){
472
482
fprintf(stderr, "Syntax error at: %s\n", err);
473
483
fprintf(stderr, "GnuTLS error: %s\n",
474
484
safer_gnutls_strerror(ret));
475
gnutls_deinit (*session);
485
gnutls_deinit(*session);
476
486
return -1;
477
487
}
478
488
}
479
489
480
490
ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,
481
mc->cred);
482
if (ret != GNUTLS_E_SUCCESS) {
491
mc.cred);
492
if(ret != GNUTLS_E_SUCCESS){
483
493
fprintf(stderr, "Error setting GnuTLS credentials: %s\n",
484
494
safer_gnutls_strerror(ret));
485
gnutls_deinit (*session);
495
gnutls_deinit(*session);
486
496
return -1;
487
497
}
488
498
489
499
/* ignore client certificate if any. */
490
gnutls_certificate_server_set_request (*session,
491
GNUTLS_CERT_IGNORE);
500
gnutls_certificate_server_set_request(*session,
501
GNUTLS_CERT_IGNORE);
492
502
493
gnutls_dh_set_prime_bits (*session, mc->dh_bits);
503
gnutls_dh_set_prime_bits(*session, mc.dh_bits);
494
504
495
505
return 0;
496
506
}
502
512
/* Called when a Mandos server is found */
503
513
static int start_mandos_communication(const char *ip, uint16_t port,
504
514
AvahiIfIndex if_index,
505
mandos_context *mc){
515
int af){
506
516
int ret, tcp_sd;
507
union { struct sockaddr in; struct sockaddr_in6 in6; } to;
517
ssize_t sret;
518
union {
519
struct sockaddr_in in;
520
struct sockaddr_in6 in6;
521
} to;
508
522
char *buffer = NULL;
509
523
char *decrypted_buffer;
510
524
size_t buffer_length = 0;
512
526
ssize_t decrypted_buffer_size;
513
527
size_t written;
514
528
int retval = 0;
515
char interface[IF_NAMESIZE];
516
529
gnutls_session_t session;
517
518
ret = init_gnutls_session (mc, &session);
519
if (ret != 0){
530
int pf; /* Protocol family */
531
532
switch(af){
533
case AF_INET6:
534
pf = PF_INET6;
535
break;
536
case AF_INET:
537
pf = PF_INET;
538
break;
539
default:
540
fprintf(stderr, "Bad address family: %d\n", af);
541
return -1;
542
}
543
544
ret = init_gnutls_session(&session);
545
if(ret != 0){
520
546
return -1;
521
547
}
522
548
523
549
if(debug){
524
fprintf(stderr, "Setting up a tcp connection to %s, port %" PRIu16
550
fprintf(stderr, "Setting up a TCP connection to %s, port %" PRIu16
525
551
"\n", ip, port);
526
552
}
527
553
528
tcp_sd = socket(PF_INET6, SOCK_STREAM, 0);
529
if(tcp_sd < 0) {
554
tcp_sd = socket(pf, SOCK_STREAM, 0);
555
if(tcp_sd < 0){
530
556
perror("socket");
531
557
return -1;
532
558
}
533
559
534
if(debug){
535
if(if_indextoname((unsigned int)if_index, interface) == NULL){
536
perror("if_indextoname");
537
return -1;
538
}
539
fprintf(stderr, "Binding to interface %s\n", interface);
540
}
541
542
560
memset(&to, 0, sizeof(to));
543
to.in6.sin6_family = AF_INET6;
544
/* It would be nice to have a way to detect if we were passed an
545
IPv4 address here. Now we assume an IPv6 address. */
546
ret = inet_pton(AF_INET6, ip, &to.in6.sin6_addr);
547
if (ret < 0 ){
561
if(af == AF_INET6){
562
to.in6.sin6_family = (uint16_t)af;
563
ret = inet_pton(af, ip, &to.in6.sin6_addr);
564
} else { /* IPv4 */
565
to.in.sin_family = (sa_family_t)af;
566
ret = inet_pton(af, ip, &to.in.sin_addr);
567
}
568
if(ret < 0 ){
548
569
perror("inet_pton");
549
570
return -1;
550
571
}
552
573
fprintf(stderr, "Bad address: %s\n", ip);
553
574
return -1;
554
575
}
555
to.in6.sin6_port = htons(port); /* Spurious warning */
556
557
to.in6.sin6_scope_id = (uint32_t)if_index;
576
if(af == AF_INET6){
577
to.in6.sin6_port = htons(port); /* Spurious warnings from
578
-Wconversion and
579
-Wunreachable-code */
580
581
if(IN6_IS_ADDR_LINKLOCAL /* Spurious warnings from */
582
(&to.in6.sin6_addr)){ /* -Wstrict-aliasing=2 or lower and
583
-Wunreachable-code*/
584
if(if_index == AVAHI_IF_UNSPEC){
585
fprintf(stderr, "An IPv6 link-local address is incomplete"
586
" without a network interface\n");
587
return -1;
588
}
589
/* Set the network interface number as scope */
590
to.in6.sin6_scope_id = (uint32_t)if_index;
591
}
592
} else {
593
to.in.sin_port = htons(port); /* Spurious warnings from
594
-Wconversion and
595
-Wunreachable-code */
596
}
558
597
559
598
if(debug){
560
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
561
port);
562
char addrstr[INET6_ADDRSTRLEN] = "";
563
if(inet_ntop(to.in6.sin6_family, &(to.in6.sin6_addr), addrstr,
564
sizeof(addrstr)) == NULL){
599
if(af == AF_INET6 and if_index != AVAHI_IF_UNSPEC){
600
char interface[IF_NAMESIZE];
601
if(if_indextoname((unsigned int)if_index, interface) == NULL){
602
perror("if_indextoname");
603
} else {
604
fprintf(stderr, "Connection to: %s%%%s, port %" PRIu16 "\n",
605
ip, interface, port);
606
}
607
} else {
608
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
609
port);
610
}
611
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
612
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
613
const char *pcret;
614
if(af == AF_INET6){
615
pcret = inet_ntop(af, &(to.in6.sin6_addr), addrstr,
616
sizeof(addrstr));
617
} else {
618
pcret = inet_ntop(af, &(to.in.sin_addr), addrstr,
619
sizeof(addrstr));
620
}
621
if(pcret == NULL){
565
622
perror("inet_ntop");
566
623
} else {
567
624
if(strcmp(addrstr, ip) != 0){
570
627
}
571
628
}
572
629
573
ret = connect(tcp_sd, &to.in, sizeof(to));
574
if (ret < 0){
630
if(af == AF_INET6){
631
ret = connect(tcp_sd, &to.in6, sizeof(to));
632
} else {
633
ret = connect(tcp_sd, &to.in, sizeof(to)); /* IPv4 */
634
}
635
if(ret < 0){
575
636
perror("connect");
576
637
return -1;
577
638
}
578
639
579
640
const char *out = mandos_protocol_version;
580
641
written = 0;
581
while (true){
642
while(true){
582
643
size_t out_size = strlen(out);
583
ret = TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
644
ret = (int)TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
584
645
out_size - written));
585
if (ret == -1){
646
if(ret == -1){
586
647
perror("write");
587
648
retval = -1;
588
649
goto mandos_end;
591
652
if(written < out_size){
592
653
continue;
593
654
} else {
594
if (out == mandos_protocol_version){
655
if(out == mandos_protocol_version){
595
656
written = 0;
596
657
out = "\r\n";
597
658
} else {
604
665
fprintf(stderr, "Establishing TLS session with %s\n", ip);
605
666
}
606
667
607
gnutls_transport_set_ptr (session, (gnutls_transport_ptr_t) tcp_sd);
668
gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t) tcp_sd);
608
669
609
670
do{
610
ret = gnutls_handshake (session);
671
ret = gnutls_handshake(session);
611
672
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
612
673
613
if (ret != GNUTLS_E_SUCCESS){
674
if(ret != GNUTLS_E_SUCCESS){
614
675
if(debug){
615
676
fprintf(stderr, "*** GnuTLS Handshake failed ***\n");
616
gnutls_perror (ret);
677
gnutls_perror(ret);
617
678
}
618
679
retval = -1;
619
680
goto mandos_end;
622
683
/* Read OpenPGP packet that contains the wanted password */
623
684
624
685
if(debug){
625
fprintf(stderr, "Retrieving pgp encrypted password from %s\n",
686
fprintf(stderr, "Retrieving OpenPGP encrypted password from %s\n",
626
687
ip);
627
688
}
628
689
629
690
while(true){
630
buffer_capacity = adjustbuffer(&buffer, buffer_length,
691
buffer_capacity = incbuffer(&buffer, buffer_length,
631
692
buffer_capacity);
632
if (buffer_capacity == 0){
633
perror("adjustbuffer");
693
if(buffer_capacity == 0){
694
perror("incbuffer");
634
695
retval = -1;
635
696
goto mandos_end;
636
697
}
637
698
638
ret = gnutls_record_recv(session, buffer+buffer_length,
639
BUFFER_SIZE);
640
if (ret == 0){
699
sret = gnutls_record_recv(session, buffer+buffer_length,
700
BUFFER_SIZE);
701
if(sret == 0){
641
702
break;
642
703
}
643
if (ret < 0){
644
switch(ret){
704
if(sret < 0){
705
switch(sret){
645
706
case GNUTLS_E_INTERRUPTED:
646
707
case GNUTLS_E_AGAIN:
647
708
break;
648
709
case GNUTLS_E_REHANDSHAKE:
649
710
do{
650
ret = gnutls_handshake (session);
711
ret = gnutls_handshake(session);
651
712
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
652
if (ret < 0){
713
if(ret < 0){
653
714
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
654
gnutls_perror (ret);
715
gnutls_perror(ret);
655
716
retval = -1;
656
717
goto mandos_end;
657
718
}
660
721
fprintf(stderr, "Unknown error while reading data from"
661
722
" encrypted session with Mandos server\n");
662
723
retval = -1;
663
gnutls_bye (session, GNUTLS_SHUT_RDWR);
724
gnutls_bye(session, GNUTLS_SHUT_RDWR);
664
725
goto mandos_end;
665
726
}
666
727
} else {
667
buffer_length += (size_t) ret;
728
buffer_length += (size_t) sret;
668
729
}
669
730
}
670
731
672
733
fprintf(stderr, "Closing TLS session\n");
673
734
}
674
735
675
gnutls_bye (session, GNUTLS_SHUT_RDWR);
736
gnutls_bye(session, GNUTLS_SHUT_RDWR);
676
737
677
if (buffer_length > 0){
678
decrypted_buffer_size = pgp_packet_decrypt(mc, buffer,
738
if(buffer_length > 0){
739
decrypted_buffer_size = pgp_packet_decrypt(buffer,
679
740
buffer_length,
680
741
&decrypted_buffer);
681
if (decrypted_buffer_size >= 0){
742
if(decrypted_buffer_size >= 0){
682
743
written = 0;
683
744
while(written < (size_t) decrypted_buffer_size){
684
ret = (int)fwrite (decrypted_buffer + written, 1,
685
(size_t)decrypted_buffer_size - written,
686
stdout);
745
ret = (int)fwrite(decrypted_buffer + written, 1,
746
(size_t)decrypted_buffer_size - written,
747
stdout);
687
748
if(ret == 0 and ferror(stdout)){
688
749
if(debug){
689
750
fprintf(stderr, "Error writing encrypted data: %s\n",
706
767
707
768
mandos_end:
708
769
free(buffer);
709
ret = TEMP_FAILURE_RETRY(close(tcp_sd));
770
ret = (int)TEMP_FAILURE_RETRY(close(tcp_sd));
710
771
if(ret == -1){
711
772
perror("close");
712
773
}
713
gnutls_deinit (session);
774
gnutls_deinit(session);
714
775
return retval;
715
776
}
716
777
717
778
static void resolve_callback(AvahiSServiceResolver *r,
718
779
AvahiIfIndex interface,
719
AVAHI_GCC_UNUSED AvahiProtocol protocol,
780
AvahiProtocol proto,
720
781
AvahiResolverEvent event,
721
782
const char *name,
722
783
const char *type,
727
788
AVAHI_GCC_UNUSED AvahiStringList *txt,
728
789
AVAHI_GCC_UNUSED AvahiLookupResultFlags
729
790
flags,
730
void* userdata) {
731
mandos_context *mc = userdata;
791
__attribute__((unused)) void* userdata){
732
792
assert(r);
733
793
734
794
/* Called whenever a service has been resolved successfully or
735
795
timed out */
736
796
737
switch (event) {
797
switch(event){
738
798
default:
739
799
case AVAHI_RESOLVER_FAILURE:
740
800
fprintf(stderr, "(Avahi Resolver) Failed to resolve service '%s'"
741
801
" of type '%s' in domain '%s': %s\n", name, type, domain,
742
avahi_strerror(avahi_server_errno(mc->server)));
802
avahi_strerror(avahi_server_errno(mc.server)));
743
803
break;
744
804
745
805
case AVAHI_RESOLVER_FOUND:
748
808
avahi_address_snprint(ip, sizeof(ip), address);
749
809
if(debug){
750
810
fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %"
751
PRIu16 ") on port %d\n", name, host_name, ip,
752
interface, port);
811
PRIdMAX ") on port %" PRIu16 "\n", name, host_name,
812
ip, (intmax_t)interface, port);
753
813
}
754
int ret = start_mandos_communication(ip, port, interface, mc);
755
if (ret == 0){
756
avahi_simple_poll_quit(mc->simple_poll);
814
int ret = start_mandos_communication(ip, port, interface,
815
avahi_proto_to_af(proto));
816
if(ret == 0){
817
avahi_simple_poll_quit(mc.simple_poll);
757
818
}
758
819
}
759
820
}
760
821
avahi_s_service_resolver_free(r);
761
822
}
762
823
763
static void browse_callback( AvahiSServiceBrowser *b,
764
AvahiIfIndex interface,
765
AvahiProtocol protocol,
766
AvahiBrowserEvent event,
767
const char *name,
768
const char *type,
769
const char *domain,
770
AVAHI_GCC_UNUSED AvahiLookupResultFlags
771
flags,
772
void* userdata) {
773
mandos_context *mc = userdata;
824
static void browse_callback(AvahiSServiceBrowser *b,
825
AvahiIfIndex interface,
826
AvahiProtocol protocol,
827
AvahiBrowserEvent event,
828
const char *name,
829
const char *type,
830
const char *domain,
831
AVAHI_GCC_UNUSED AvahiLookupResultFlags
832
flags,
833
__attribute__((unused)) void* userdata){
774
834
assert(b);
775
835
776
836
/* Called whenever a new services becomes available on the LAN or
777
837
is removed from the LAN */
778
838
779
switch (event) {
839
switch(event){
780
840
default:
781
841
case AVAHI_BROWSER_FAILURE:
782
842
783
843
fprintf(stderr, "(Avahi browser) %s\n",
784
avahi_strerror(avahi_server_errno(mc->server)));
785
avahi_simple_poll_quit(mc->simple_poll);
844
avahi_strerror(avahi_server_errno(mc.server)));
845
avahi_simple_poll_quit(mc.simple_poll);
786
846
return;
787
847
788
848
case AVAHI_BROWSER_NEW:
791
851
the callback function is called the Avahi server will free the
792
852
resolver for us. */
793
853
794
if (!(avahi_s_service_resolver_new(mc->server, interface,
854
if(!(avahi_s_service_resolver_new(mc.server, interface,
795
855
protocol, name, type, domain,
796
856
AVAHI_PROTO_INET6, 0,
797
resolve_callback, mc)))
857
resolve_callback, NULL)))
798
858
fprintf(stderr, "Avahi: Failed to resolve service '%s': %s\n",
799
name, avahi_strerror(avahi_server_errno(mc->server)));
859
name, avahi_strerror(avahi_server_errno(mc.server)));
800
860
break;
801
861
802
862
case AVAHI_BROWSER_REMOVE:
811
871
}
812
872
}
813
873
874
/* stop main loop after sigterm has been called */
875
static void handle_sigterm(__attribute__((unused)) int sig){
876
int old_errno = errno;
877
avahi_simple_poll_quit(mc.simple_poll);
878
errno = old_errno;
879
}
880
814
881
int main(int argc, char *argv[]){
815
AvahiSServiceBrowser *sb = NULL;
816
int error;
817
int ret;
818
int exitcode = EXIT_SUCCESS;
819
const char *interface = "eth0";
820
struct ifreq network;
821
int sd;
822
uid_t uid;
823
gid_t gid;
824
char *connect_to = NULL;
825
char tempdir[] = "/tmp/mandosXXXXXX";
826
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
827
const char *seckey = PATHDIR "/" SECKEY;
828
const char *pubkey = PATHDIR "/" PUBKEY;
829
830
mandos_context mc = { .simple_poll = NULL, .server = NULL,
831
.dh_bits = 1024, .priority = "SECURE256"
832
":!CTYPE-X.509:+CTYPE-OPENPGP" };
833
bool gnutls_initalized = false;
834
bool gpgme_initalized = false;
835
836
{
837
struct argp_option options[] = {
838
{ .name = "debug", .key = 128,
839
.doc = "Debug mode", .group = 3 },
840
{ .name = "connect", .key = 'c',
841
.arg = "ADDRESS:PORT",
842
.doc = "Connect directly to a specific Mandos server",
843
.group = 1 },
844
{ .name = "interface", .key = 'i',
845
.arg = "NAME",
846
.doc = "Interface that will be used to search for Mandos"
847
" servers",
848
.group = 1 },
849
{ .name = "seckey", .key = 's',
850
.arg = "FILE",
851
.doc = "OpenPGP secret key file base name",
852
.group = 1 },
853
{ .name = "pubkey", .key = 'p',
854
.arg = "FILE",
855
.doc = "OpenPGP public key file base name",
856
.group = 2 },
857
{ .name = "dh-bits", .key = 129,
858
.arg = "BITS",
859
.doc = "Bit length of the prime number used in the"
860
" Diffie-Hellman key exchange",
861
.group = 2 },
862
{ .name = "priority", .key = 130,
863
.arg = "STRING",
864
.doc = "GnuTLS priority string for the TLS handshake",
865
.group = 1 },
866
{ .name = NULL }
867
};
868
869
error_t parse_opt (int key, char *arg,
870
struct argp_state *state) {
871
/* Get the INPUT argument from `argp_parse', which we know is
872
a pointer to our plugin list pointer. */
873
switch (key) {
874
case 128: /* --debug */
875
debug = true;
876
break;
877
case 'c': /* --connect */
878
connect_to = arg;
879
break;
880
case 'i': /* --interface */
881
interface = arg;
882
break;
883
case 's': /* --seckey */
884
seckey = arg;
885
break;
886
case 'p': /* --pubkey */
887
pubkey = arg;
888
break;
889
case 129: /* --dh-bits */
890
errno = 0;
891
mc.dh_bits = (unsigned int) strtol(arg, NULL, 10);
892
if (errno){
893
perror("strtol");
894
exit(EXIT_FAILURE);
882
AvahiSServiceBrowser *sb = NULL;
883
int error;
884
int ret;
885
intmax_t tmpmax;
886
int numchars;
887
int exitcode = EXIT_SUCCESS;
888
const char *interface = "eth0";
889
struct ifreq network;
890
int sd;
891
uid_t uid;
892
gid_t gid;
893
char *connect_to = NULL;
894
char tempdir[] = "/tmp/mandosXXXXXX";
895
bool tempdir_created = false;
896
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
897
const char *seckey = PATHDIR "/" SECKEY;
898
const char *pubkey = PATHDIR "/" PUBKEY;
899
900
bool gnutls_initialized = false;
901
bool gpgme_initialized = false;
902
double delay = 2.5;
903
904
struct sigaction old_sigterm_action;
905
struct sigaction sigterm_action = { .sa_handler = handle_sigterm };
906
907
{
908
struct argp_option options[] = {
909
{ .name = "debug", .key = 128,
910
.doc = "Debug mode", .group = 3 },
911
{ .name = "connect", .key = 'c',
912
.arg = "ADDRESS:PORT",
913
.doc = "Connect directly to a specific Mandos server",
914
.group = 1 },
915
{ .name = "interface", .key = 'i',
916
.arg = "NAME",
917
.doc = "Network interface that will be used to search for"
918
" Mandos servers",
919
.group = 1 },
920
{ .name = "seckey", .key = 's',
921
.arg = "FILE",
922
.doc = "OpenPGP secret key file base name",
923
.group = 1 },
924
{ .name = "pubkey", .key = 'p',
925
.arg = "FILE",
926
.doc = "OpenPGP public key file base name",
927
.group = 2 },
928
{ .name = "dh-bits", .key = 129,
929
.arg = "BITS",
930
.doc = "Bit length of the prime number used in the"
931
" Diffie-Hellman key exchange",
932
.group = 2 },
933
{ .name = "priority", .key = 130,
934
.arg = "STRING",
935
.doc = "GnuTLS priority string for the TLS handshake",
936
.group = 1 },
937
{ .name = "delay", .key = 131,
938
.arg = "SECONDS",
939
.doc = "Maximum delay to wait for interface startup",
940
.group = 2 },
941
{ .name = NULL }
942
};
943
944
error_t parse_opt(int key, char *arg,
945
struct argp_state *state){
946
switch(key){
947
case 128: /* --debug */
948
debug = true;
949
break;
950
case 'c': /* --connect */
951
connect_to = arg;
952
break;
953
case 'i': /* --interface */
954
interface = arg;
955
break;
956
case 's': /* --seckey */
957
seckey = arg;
958
break;
959
case 'p': /* --pubkey */
960
pubkey = arg;
961
break;
962
case 129: /* --dh-bits */
963
ret = sscanf(arg, "%" SCNdMAX "%n", &tmpmax, &numchars);
964
if(ret < 1 or tmpmax != (typeof(mc.dh_bits))tmpmax
965
or arg[numchars] != '\0'){
966
fprintf(stderr, "Bad number of DH bits\n");
967
exit(EXIT_FAILURE);
968
}
969
mc.dh_bits = (typeof(mc.dh_bits))tmpmax;
970
break;
971
case 130: /* --priority */
972
mc.priority = arg;
973
break;
974
case 131: /* --delay */
975
ret = sscanf(arg, "%lf%n", &delay, &numchars);
976
if(ret < 1 or arg[numchars] != '\0'){
977
fprintf(stderr, "Bad delay\n");
978
exit(EXIT_FAILURE);
979
}
980
break;
981
case ARGP_KEY_ARG:
982
argp_usage(state);
983
case ARGP_KEY_END:
984
break;
985
default:
986
return ARGP_ERR_UNKNOWN;
987
}
988
return 0;
989
}
990
991
struct argp argp = { .options = options, .parser = parse_opt,
992
.args_doc = "",
993
.doc = "Mandos client -- Get and decrypt"
994
" passwords from a Mandos server" };
995
ret = argp_parse(&argp, argc, argv, 0, 0, NULL);
996
if(ret == ARGP_ERR_UNKNOWN){
997
fprintf(stderr, "Unknown error while parsing arguments\n");
998
exitcode = EXIT_FAILURE;
999
goto end;
1000
}
1001
}
1002
1003
if(not debug){
1004
avahi_set_log_function(empty_log);
1005
}
1006
1007
/* Initialize Avahi early so avahi_simple_poll_quit() can be called
1008
from the signal handler */
1009
/* Initialize the pseudo-RNG for Avahi */
1010
srand((unsigned int) time(NULL));
1011
mc.simple_poll = avahi_simple_poll_new();
1012
if(mc.simple_poll == NULL){
1013
fprintf(stderr, "Avahi: Failed to create simple poll object.\n");
1014
exitcode = EXIT_FAILURE;
1015
goto end;
1016
}
1017
1018
sigemptyset(&sigterm_action.sa_mask);
1019
ret = sigaddset(&sigterm_action.sa_mask, SIGTERM);
1020
if(ret == -1){
1021
perror("sigaddset");
1022
exitcode = EXIT_FAILURE;
1023
goto end;
1024
}
1025
ret = sigaction(SIGTERM, &sigterm_action, &old_sigterm_action);
1026
if(ret == -1){
1027
perror("sigaction");
1028
exitcode = EXIT_FAILURE;
1029
goto end;
1030
}
1031
1032
1033
/* If the interface is down, bring it up */
1034
if(interface[0] != '\0'){
1035
#ifdef __linux__
1036
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1037
messages to mess up the prompt */
1038
ret = klogctl(8, NULL, 5);
1039
bool restore_loglevel = true;
1040
if(ret == -1){
1041
restore_loglevel = false;
1042
perror("klogctl");
1043
}
1044
#endif
1045
1046
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1047
if(sd < 0){
1048
perror("socket");
1049
exitcode = EXIT_FAILURE;
1050
#ifdef __linux__
1051
if(restore_loglevel){
1052
ret = klogctl(7, NULL, 0);
1053
if(ret == -1){
1054
perror("klogctl");
1055
}
1056
}
1057
#endif
1058
goto end;
1059
}
1060
strcpy(network.ifr_name, interface);
1061
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1062
if(ret == -1){
1063
perror("ioctl SIOCGIFFLAGS");
1064
#ifdef __linux__
1065
if(restore_loglevel){
1066
ret = klogctl(7, NULL, 0);
1067
if(ret == -1){
1068
perror("klogctl");
1069
}
1070
}
1071
#endif
1072
exitcode = EXIT_FAILURE;
1073
goto end;
1074
}
1075
if((network.ifr_flags & IFF_UP) == 0){
1076
network.ifr_flags |= IFF_UP;
1077
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1078
if(ret == -1){
1079
perror("ioctl SIOCSIFFLAGS");
1080
exitcode = EXIT_FAILURE;
1081
#ifdef __linux__
1082
if(restore_loglevel){
1083
ret = klogctl(7, NULL, 0);
1084
if(ret == -1){
1085
perror("klogctl");
895
1086
}
896
break;
897
case 130: /* --priority */
898
mc.priority = arg;
899
break;
900
case ARGP_KEY_ARG:
901
argp_usage (state);
902
case ARGP_KEY_END:
903
break;
904
default:
905
return ARGP_ERR_UNKNOWN;
906
1087
}
907
return 0;
908
}
909
910
struct argp argp = { .options = options, .parser = parse_opt,
911
.args_doc = "",
912
.doc = "Mandos client -- Get and decrypt"
913
" passwords from a Mandos server" };
914
ret = argp_parse (&argp, argc, argv, 0, 0, NULL);
915
if (ret == ARGP_ERR_UNKNOWN){
916
fprintf(stderr, "Unknown error while parsing arguments\n");
917
exitcode = EXIT_FAILURE;
1088
#endif
918
1089
goto end;
919
1090
}
920
1091
}
921
922
/* If the interface is down, bring it up */
923
{
924
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
925
if(sd < 0) {
926
perror("socket");
927
exitcode = EXIT_FAILURE;
928
goto end;
929
}
930
strcpy(network.ifr_name, interface);
1092
/* sleep checking until interface is running */
1093
for(int i=0; i < delay * 4; i++){
931
1094
ret = ioctl(sd, SIOCGIFFLAGS, &network);
932
1095
if(ret == -1){
933
1096
perror("ioctl SIOCGIFFLAGS");
934
exitcode = EXIT_FAILURE;
935
goto end;
936
}
937
if((network.ifr_flags & IFF_UP) == 0){
938
network.ifr_flags |= IFF_UP;
939
ret = ioctl(sd, SIOCSIFFLAGS, &network);
940
if(ret == -1){
941
perror("ioctl SIOCSIFFLAGS");
942
exitcode = EXIT_FAILURE;
943
goto end;
944
}
945
}
946
ret = TEMP_FAILURE_RETRY(close(sd));
1097
} else if(network.ifr_flags & IFF_RUNNING){
1098
break;
1099
}
1100
struct timespec sleeptime = { .tv_nsec = 250000000 };
1101
ret = nanosleep(&sleeptime, NULL);
1102
if(ret == -1 and errno != EINTR){
1103
perror("nanosleep");
1104
}
1105
}
1106
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1107
if(ret == -1){
1108
perror("close");
1109
}
1110
#ifdef __linux__
1111
if(restore_loglevel){
1112
/* Restores kernel loglevel to default */
1113
ret = klogctl(7, NULL, 0);
947
1114
if(ret == -1){
948
perror("close");
1115
perror("klogctl");
949
1116
}
950
1117
}
951
952
uid = getuid();
953
gid = getgid();
954
955
ret = setuid(uid);
956
if (ret == -1){
957
perror("setuid");
958
}
959
960
setgid(gid);
961
if (ret == -1){
962
perror("setgid");
963
}
964
965
ret = init_gnutls_global(&mc, pubkey, seckey);
966
if (ret == -1){
967
fprintf(stderr, "init_gnutls_global failed\n");
968
exitcode = EXIT_FAILURE;
969
goto end;
970
} else {
971
gnutls_initalized = true;
972
}
973
974
if(mkdtemp(tempdir) == NULL){
975
perror("mkdtemp");
976
tempdir[0] = '\0';
977
goto end;
978
}
979
980
if(not init_gpgme(&mc, pubkey, seckey, tempdir)){
981
fprintf(stderr, "gpgme_initalized failed\n");
982
exitcode = EXIT_FAILURE;
983
goto end;
984
} else {
985
gpgme_initalized = true;
986
}
987
1118
#endif
1119
}
1120
1121
uid = getuid();
1122
gid = getgid();
1123
1124
errno = 0;
1125
setgid(gid);
1126
if(ret == -1){
1127
perror("setgid");
1128
}
1129
1130
ret = setuid(uid);
1131
if(ret == -1){
1132
perror("setuid");
1133
}
1134
1135
ret = init_gnutls_global(pubkey, seckey);
1136
if(ret == -1){
1137
fprintf(stderr, "init_gnutls_global failed\n");
1138
exitcode = EXIT_FAILURE;
1139
goto end;
1140
} else {
1141
gnutls_initialized = true;
1142
}
1143
1144
if(mkdtemp(tempdir) == NULL){
1145
perror("mkdtemp");
1146
goto end;
1147
}
1148
tempdir_created = true;
1149
1150
if(not init_gpgme(pubkey, seckey, tempdir)){
1151
fprintf(stderr, "init_gpgme failed\n");
1152
exitcode = EXIT_FAILURE;
1153
goto end;
1154
} else {
1155
gpgme_initialized = true;
1156
}
1157
1158
if(interface[0] != '\0'){
988
1159
if_index = (AvahiIfIndex) if_nametoindex(interface);
989
1160
if(if_index == 0){
990
1161
fprintf(stderr, "No such interface: \"%s\"\n", interface);
991
exit(EXIT_FAILURE);
992
}
993
994
if(connect_to != NULL){
995
/* Connect directly, do not use Zeroconf */
996
/* (Mainly meant for debugging) */
997
char *address = strrchr(connect_to, ':');
998
if(address == NULL){
999
fprintf(stderr, "No colon in address\n");
1000
exitcode = EXIT_FAILURE;
1001
goto end;
1002
}
1003
errno = 0;
1004
uint16_t port = (uint16_t) strtol(address+1, NULL, 10);
1005
if(errno){
1006
perror("Bad port number");
1007
exitcode = EXIT_FAILURE;
1008
goto end;
1009
}
1010
*address = '\0';
1011
address = connect_to;
1012
ret = start_mandos_communication(address, port, if_index, &mc);
1013
if(ret < 0){
1014
exitcode = EXIT_FAILURE;
1015
} else {
1016
exitcode = EXIT_SUCCESS;
1017
}
1018
goto end;
1019
}
1020
1021
if (not debug){
1022
avahi_set_log_function(empty_log);
1023
}
1024
1025
/* Initialize the pseudo-RNG for Avahi */
1026
srand((unsigned int) time(NULL));
1027
1028
/* Allocate main Avahi loop object */
1029
mc.simple_poll = avahi_simple_poll_new();
1030
if (mc.simple_poll == NULL) {
1031
fprintf(stderr, "Avahi: Failed to create simple poll"
1032
" object.\n");
1033
exitcode = EXIT_FAILURE;
1034
goto end;
1035
}
1036
1037
{
1038
AvahiServerConfig config;
1039
/* Do not publish any local Zeroconf records */
1040
avahi_server_config_init(&config);
1041
config.publish_hinfo = 0;
1042
config.publish_addresses = 0;
1043
config.publish_workstation = 0;
1044
config.publish_domain = 0;
1045
1046
/* Allocate a new server */
1047
mc.server = avahi_server_new(avahi_simple_poll_get
1048
(mc.simple_poll), &config, NULL,
1049
NULL, &error);
1050
1051
/* Free the Avahi configuration data */
1052
avahi_server_config_free(&config);
1053
}
1054
1055
/* Check if creating the Avahi server object succeeded */
1056
if (mc.server == NULL) {
1057
fprintf(stderr, "Failed to create Avahi server: %s\n",
1058
avahi_strerror(error));
1059
exitcode = EXIT_FAILURE;
1060
goto end;
1061
}
1062
1063
/* Create the Avahi service browser */
1064
sb = avahi_s_service_browser_new(mc.server, if_index,
1065
AVAHI_PROTO_INET6,
1066
"_mandos._tcp", NULL, 0,
1067
browse_callback, &mc);
1068
if (sb == NULL) {
1069
fprintf(stderr, "Failed to create service browser: %s\n",
1070
avahi_strerror(avahi_server_errno(mc.server)));
1071
exitcode = EXIT_FAILURE;
1072
goto end;
1073
}
1074
1075
/* Run the main loop */
1076
1077
if (debug){
1078
fprintf(stderr, "Starting Avahi loop search\n");
1079
}
1080
1081
avahi_simple_poll_loop(mc.simple_poll);
1082
1162
exitcode = EXIT_FAILURE;
1163
goto end;
1164
}
1165
}
1166
1167
if(connect_to != NULL){
1168
/* Connect directly, do not use Zeroconf */
1169
/* (Mainly meant for debugging) */
1170
char *address = strrchr(connect_to, ':');
1171
if(address == NULL){
1172
fprintf(stderr, "No colon in address\n");
1173
exitcode = EXIT_FAILURE;
1174
goto end;
1175
}
1176
uint16_t port;
1177
ret = sscanf(address+1, "%" SCNdMAX "%n", &tmpmax, &numchars);
1178
if(ret < 1 or tmpmax != (uint16_t)tmpmax
1179
or address[numchars+1] != '\0'){
1180
fprintf(stderr, "Bad port number\n");
1181
exitcode = EXIT_FAILURE;
1182
goto end;
1183
}
1184
port = (uint16_t)tmpmax;
1185
*address = '\0';
1186
address = connect_to;
1187
/* Colon in address indicates IPv6 */
1188
int af;
1189
if(strchr(address, ':') != NULL){
1190
af = AF_INET6;
1191
} else {
1192
af = AF_INET;
1193
}
1194
ret = start_mandos_communication(address, port, if_index,
1195
af);
1196
if(ret < 0){
1197
exitcode = EXIT_FAILURE;
1198
} else {
1199
exitcode = EXIT_SUCCESS;
1200
}
1201
goto end;
1202
}
1203
1204
{
1205
AvahiServerConfig config;
1206
/* Do not publish any local Zeroconf records */
1207
avahi_server_config_init(&config);
1208
config.publish_hinfo = 0;
1209
config.publish_addresses = 0;
1210
config.publish_workstation = 0;
1211
config.publish_domain = 0;
1212
1213
/* Allocate a new server */
1214
mc.server = avahi_server_new(avahi_simple_poll_get
1215
(mc.simple_poll), &config, NULL,
1216
NULL, &error);
1217
1218
/* Free the Avahi configuration data */
1219
avahi_server_config_free(&config);
1220
}
1221
1222
/* Check if creating the Avahi server object succeeded */
1223
if(mc.server == NULL){
1224
fprintf(stderr, "Failed to create Avahi server: %s\n",
1225
avahi_strerror(error));
1226
exitcode = EXIT_FAILURE;
1227
goto end;
1228
}
1229
1230
/* Create the Avahi service browser */
1231
sb = avahi_s_service_browser_new(mc.server, if_index,
1232
AVAHI_PROTO_INET6, "_mandos._tcp",
1233
NULL, 0, browse_callback, NULL);
1234
if(sb == NULL){
1235
fprintf(stderr, "Failed to create service browser: %s\n",
1236
avahi_strerror(avahi_server_errno(mc.server)));
1237
exitcode = EXIT_FAILURE;
1238
goto end;
1239
}
1240
1241
/* Run the main loop */
1242
1243
if(debug){
1244
fprintf(stderr, "Starting Avahi loop search\n");
1245
}
1246
1247
avahi_simple_poll_loop(mc.simple_poll);
1248
1083
1249
end:
1084
1085
if (debug){
1086
fprintf(stderr, "%s exiting\n", argv[0]);
1087
}
1088
1089
/* Cleanup things */
1090
if (sb != NULL)
1091
avahi_s_service_browser_free(sb);
1092
1093
if (mc.server != NULL)
1094
avahi_server_free(mc.server);
1095
1096
if (mc.simple_poll != NULL)
1097
avahi_simple_poll_free(mc.simple_poll);
1098
1099
if (gnutls_initalized){
1100
gnutls_certificate_free_credentials(mc.cred);
1101
gnutls_global_deinit ();
1102
gnutls_dh_params_deinit(mc.dh_params);
1103
}
1104
1105
if(gpgme_initalized){
1106
gpgme_release(mc.ctx);
1107
}
1108
1109
/* Removes the temp directory used by GPGME */
1110
if(tempdir[0] != '\0'){
1111
DIR *d;
1112
struct dirent *direntry;
1113
d = opendir(tempdir);
1114
if(d == NULL){
1250
1251
if(debug){
1252
fprintf(stderr, "%s exiting\n", argv[0]);
1253
}
1254
1255
/* Cleanup things */
1256
if(sb != NULL)
1257
avahi_s_service_browser_free(sb);
1258
1259
if(mc.server != NULL)
1260
avahi_server_free(mc.server);
1261
1262
if(mc.simple_poll != NULL)
1263
avahi_simple_poll_free(mc.simple_poll);
1264
1265
if(gnutls_initialized){
1266
gnutls_certificate_free_credentials(mc.cred);
1267
gnutls_global_deinit();
1268
gnutls_dh_params_deinit(mc.dh_params);
1269
}
1270
1271
if(gpgme_initialized){
1272
gpgme_release(mc.ctx);
1273
}
1274
1275
/* Removes the temp directory used by GPGME */
1276
if(tempdir_created){
1277
DIR *d;
1278
struct dirent *direntry;
1279
d = opendir(tempdir);
1280
if(d == NULL){
1281
if(errno != ENOENT){
1115
1282
perror("opendir");
1116
} else {
1117
while(true){
1118
direntry = readdir(d);
1119
if(direntry == NULL){
1120
break;
1121
}
1122
if (direntry->d_type == DT_REG){
1123
char *fullname = NULL;
1124
ret = asprintf(&fullname, "%s/%s", tempdir,
1125
direntry->d_name);
1126
if(ret < 0){
1127
perror("asprintf");
1128
continue;
1129
}
1130
ret = unlink(fullname);
1131
if(ret == -1){
1132
fprintf(stderr, "unlink(\"%s\"): %s",
1133
fullname, strerror(errno));
1134
}
1135
free(fullname);
1136
}
1137
}
1138
closedir(d);
1139
}
1140
ret = rmdir(tempdir);
1141
if(ret == -1){
1142
perror("rmdir");
1143
}
1144
}
1145
1146
return exitcode;
1283
}
1284
} else {
1285
while(true){
1286
direntry = readdir(d);
1287
if(direntry == NULL){
1288
break;
1289
}
1290
/* Skip "." and ".." */
1291
if(direntry->d_name[0] == '.'
1292
and (direntry->d_name[1] == '\0'
1293
or (direntry->d_name[1] == '.'
1294
and direntry->d_name[2] == '\0'))){
1295
continue;
1296
}
1297
char *fullname = NULL;
1298
ret = asprintf(&fullname, "%s/%s", tempdir,
1299
direntry->d_name);
1300
if(ret < 0){
1301
perror("asprintf");
1302
continue;
1303
}
1304
ret = remove(fullname);
1305
if(ret == -1){
1306
fprintf(stderr, "remove(\"%s\"): %s\n", fullname,
1307
strerror(errno));
1308
}
1309
free(fullname);
1310
}
1311
closedir(d);
1312
}
1313
ret = rmdir(tempdir);
1314
if(ret == -1 and errno != ENOENT){
1315
perror("rmdir");
1316
}
1317
}
1318
1319
return exitcode;
1147
1320
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0