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237.2.67
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: plugins.d/mandos-client.c
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- Committer: Teddy Hogeborn
- Date: 2009-02-09 02:01:13 UTC
- mto: (24.1.133 mandos) (237.4.2 mandos-pipe-ipc) (299.1.1 release) (300.1.1 release) (301.1.1 release)
- mto: This revision was merged to the branch mainline in revision 250.
- Revision ID: teddy@fukt.bsnet.se-20090209020113-726hq380zvp8zt97
Four new interrelated features:
1. Support using a different network interface via both initramfs.conf
(the DEVICE setting) and the kernel command line (sixth field of
the "ip=" option as in Linux' Documentation/nfsroot.txt).
2. Support connecting to a specified Mandos server directly using a
kernel command line option ("mandos=connect:<ADDRESS>:<PORT>").
3. Support connecting directly to an IPv4 address (and port) using the
"--connect" option of mandos-client.
4. Support an empty string to the --interface option to mandos-client.
* Makefile (WARN): Increase strictness by changing to
"-Wstrict-aliasing=1".
* debian/mandos-client.README.Debian (Use the Correct Network
Interface): Changed to refer to initramfs.conf and nfsroot.txt.
(Test the Server): Improve wording.
(Non-local Connection): New section.
* initramfs-tools-script: Obey DEVICE environment variable and setting
from "/conf/initramfs.conf". Also let any
"ip=" kernel command line option override
it. Support new "mandos=connect" option.
Call "configure_networking" to set up IP
address on interface if necessary.
* plugin-runner.conf: Change example.
* plugins.d/mandos-client.c: Some whitespace and comment changes.
(start_mandos_communication): Take an additional argument for
address family, all callers changed.
Connect to an IPv4 address if address
family is AF_INET. Only set IPv6
scope_id for link-local addresses.
(main): Accept empty interface name; this will not bring up any
interface and leave the interface as unspecified. Also do
not restore kernel log level if lowering it failed.
* plugins.d/mandos-client.xml (OPTIONS): Document that the
"--interface" option accepts
an empty string.
(EXAMPLE): Change example IPv6 address to a link-local address.
1. Support using a different network interface via both initramfs.conf
(the DEVICE setting) and the kernel command line (sixth field of
the "ip=" option as in Linux' Documentation/nfsroot.txt).
2. Support connecting to a specified Mandos server directly using a
kernel command line option ("mandos=connect:<ADDRESS>:<PORT>").
3. Support connecting directly to an IPv4 address (and port) using the
"--connect" option of mandos-client.
4. Support an empty string to the --interface option to mandos-client.
* Makefile (WARN): Increase strictness by changing to
"-Wstrict-aliasing=1".
* debian/mandos-client.README.Debian (Use the Correct Network
Interface): Changed to refer to initramfs.conf and nfsroot.txt.
(Test the Server): Improve wording.
(Non-local Connection): New section.
* initramfs-tools-script: Obey DEVICE environment variable and setting
from "/conf/initramfs.conf". Also let any
"ip=" kernel command line option override
it. Support new "mandos=connect" option.
Call "configure_networking" to set up IP
address on interface if necessary.
* plugin-runner.conf: Change example.
* plugins.d/mandos-client.c: Some whitespace and comment changes.
(start_mandos_communication): Take an additional argument for
address family, all callers changed.
Connect to an IPv4 address if address
family is AF_INET. Only set IPv6
scope_id for link-local addresses.
(main): Accept empty interface name; this will not bring up any
interface and leave the interface as unspecified. Also do
not restore kernel log level if lowering it failed.
* plugins.d/mandos-client.xml (OPTIONS): Document that the
"--interface" option accepts
an empty string.
(EXAMPLE): Change example IPv6 address to a link-local address.
- files added:
- debian/watch
- files renamed:
- mandos-list => mandos-ctl
- files modified:
- INSTALL
added
removed
plugins.d/mandos-client.c
36
36
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), asprintf() */
37
37
38
38
#include <stdio.h> /* fprintf(), stderr, fwrite(),
39
stdout, ferror(), sscanf */
39
stdout, ferror(), sscanf(),
40
remove() */
40
41
#include <stdint.h> /* uint16_t, uint32_t */
41
42
#include <stddef.h> /* NULL, size_t, ssize_t */
42
43
#include <stdlib.h> /* free(), EXIT_SUCCESS, EXIT_FAILURE,
43
44
srand() */
44
#include <stdbool.h> /* bool, true */
45
#include <stdbool.h> /* bool, false, true */
45
46
#include <string.h> /* memset(), strcmp(), strlen(),
46
47
strerror(), asprintf(), strcpy() */
47
#include <sys/ioctl.h> /* ioctl */
48
#include <sys/ioctl.h> /* ioctl */
48
49
#include <sys/types.h> /* socket(), inet_pton(), sockaddr,
49
50
sockaddr_in6, PF_INET6,
50
SOCK_STREAM, INET6_ADDRSTRLEN,
51
uid_t, gid_t, open(), opendir(), DIR */
51
SOCK_STREAM, uid_t, gid_t, open(),
52
opendir(), DIR */
52
53
#include <sys/stat.h> /* open() */
53
54
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
54
struct in6_addr, inet_pton(),
55
connect() */
55
inet_pton(), connect() */
56
56
#include <fcntl.h> /* open() */
57
#include <dirent.h> /* opendir(), struct dirent, readdir() */
58
#include <inttypes.h> /* PRIu16, SCNu16 */
57
#include <dirent.h> /* opendir(), struct dirent, readdir()
58
*/
59
#include <inttypes.h> /* PRIu16, intmax_t, SCNdMAX */
59
60
#include <assert.h> /* assert() */
60
61
#include <errno.h> /* perror(), errno */
61
#include <time.h> /* time() */
62
#include <time.h> /* nanosleep(), time() */
62
63
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
63
64
SIOCSIFFLAGS, if_indextoname(),
64
65
if_nametoindex(), IF_NAMESIZE */
65
#include <netinet/in.h>
66
#include <netinet/in.h> /* IN6_IS_ADDR_LINKLOCAL,
67
INET_ADDRSTRLEN, INET6_ADDRSTRLEN
68
*/
66
69
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
67
70
getuid(), getgid(), setuid(),
68
71
setgid() */
69
72
#include <arpa/inet.h> /* inet_pton(), htons */
70
#include <iso646.h> /* not, and, or */
73
#include <iso646.h> /* not, or, and */
71
74
#include <argp.h> /* struct argp_option, error_t, struct
72
75
argp_state, struct argp,
73
76
argp_parse(), ARGP_KEY_ARG,
74
77
ARGP_KEY_END, ARGP_ERR_UNKNOWN */
78
#ifdef __linux__
79
#include <sys/klog.h> /* klogctl() */
80
#endif
75
81
76
82
/* Avahi */
77
83
/* All Avahi types, constants and functions
90
96
gnutls_*
91
97
init_gnutls_session(),
92
98
GNUTLS_* */
93
#include <gnutls/openpgp.h> /* gnutls_certificate_set_openpgp_key_file(),
99
#include <gnutls/openpgp.h>
100
/* gnutls_certificate_set_openpgp_key_file(),
94
101
GNUTLS_OPENPGP_FMT_BASE64 */
95
102
96
103
/* GPGME */
129
136
*/
130
137
size_t adjustbuffer(char **buffer, size_t buffer_length,
131
138
size_t buffer_capacity){
132
if (buffer_length + BUFFER_SIZE > buffer_capacity){
139
if(buffer_length + BUFFER_SIZE > buffer_capacity){
133
140
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
134
if (buffer == NULL){
141
if(buffer == NULL){
135
142
return 0;
136
143
}
137
144
buffer_capacity += BUFFER_SIZE;
150
157
151
158
152
159
/*
153
* Helper function to insert pub and seckey to the enigne keyring.
160
* Helper function to insert pub and seckey to the engine keyring.
154
161
*/
155
162
bool import_key(const char *filename){
156
163
int fd;
163
170
}
164
171
165
172
rc = gpgme_data_new_from_fd(&pgp_data, fd);
166
if (rc != GPG_ERR_NO_ERROR){
173
if(rc != GPG_ERR_NO_ERROR){
167
174
fprintf(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
168
175
gpgme_strsource(rc), gpgme_strerror(rc));
169
176
return false;
170
177
}
171
178
172
179
rc = gpgme_op_import(mc->ctx, pgp_data);
173
if (rc != GPG_ERR_NO_ERROR){
180
if(rc != GPG_ERR_NO_ERROR){
174
181
fprintf(stderr, "bad gpgme_op_import: %s: %s\n",
175
182
gpgme_strsource(rc), gpgme_strerror(rc));
176
183
return false;
184
191
return true;
185
192
}
186
193
187
if (debug){
194
if(debug){
188
195
fprintf(stderr, "Initialize gpgme\n");
189
196
}
190
197
191
198
/* Init GPGME */
192
199
gpgme_check_version(NULL);
193
200
rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
194
if (rc != GPG_ERR_NO_ERROR){
201
if(rc != GPG_ERR_NO_ERROR){
195
202
fprintf(stderr, "bad gpgme_engine_check_version: %s: %s\n",
196
203
gpgme_strsource(rc), gpgme_strerror(rc));
197
204
return false;
198
205
}
199
206
200
207
/* Set GPGME home directory for the OpenPGP engine only */
201
rc = gpgme_get_engine_info (&engine_info);
202
if (rc != GPG_ERR_NO_ERROR){
208
rc = gpgme_get_engine_info(&engine_info);
209
if(rc != GPG_ERR_NO_ERROR){
203
210
fprintf(stderr, "bad gpgme_get_engine_info: %s: %s\n",
204
211
gpgme_strsource(rc), gpgme_strerror(rc));
205
212
return false;
219
226
220
227
/* Create new GPGME "context" */
221
228
rc = gpgme_new(&(mc->ctx));
222
if (rc != GPG_ERR_NO_ERROR){
229
if(rc != GPG_ERR_NO_ERROR){
223
230
fprintf(stderr, "bad gpgme_new: %s: %s\n",
224
231
gpgme_strsource(rc), gpgme_strerror(rc));
225
232
return false;
226
233
}
227
234
228
if (not import_key(pubkey) or not import_key(seckey)){
235
if(not import_key(pubkey) or not import_key(seckey)){
229
236
return false;
230
237
}
231
238
236
243
* Decrypt OpenPGP data.
237
244
* Returns -1 on error
238
245
*/
239
static ssize_t pgp_packet_decrypt (const mandos_context *mc,
240
const char *cryptotext,
241
size_t crypto_size,
242
char **plaintext){
246
static ssize_t pgp_packet_decrypt(const mandos_context *mc,
247
const char *cryptotext,
248
size_t crypto_size,
249
char **plaintext){
243
250
gpgme_data_t dh_crypto, dh_plain;
244
251
gpgme_error_t rc;
245
252
ssize_t ret;
246
253
size_t plaintext_capacity = 0;
247
254
ssize_t plaintext_length = 0;
248
255
249
if (debug){
256
if(debug){
250
257
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
251
258
}
252
259
253
260
/* Create new GPGME data buffer from memory cryptotext */
254
261
rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,
255
262
0);
256
if (rc != GPG_ERR_NO_ERROR){
263
if(rc != GPG_ERR_NO_ERROR){
257
264
fprintf(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
258
265
gpgme_strsource(rc), gpgme_strerror(rc));
259
266
return -1;
261
268
262
269
/* Create new empty GPGME data buffer for the plaintext */
263
270
rc = gpgme_data_new(&dh_plain);
264
if (rc != GPG_ERR_NO_ERROR){
271
if(rc != GPG_ERR_NO_ERROR){
265
272
fprintf(stderr, "bad gpgme_data_new: %s: %s\n",
266
273
gpgme_strsource(rc), gpgme_strerror(rc));
267
274
gpgme_data_release(dh_crypto);
271
278
/* Decrypt data from the cryptotext data buffer to the plaintext
272
279
data buffer */
273
280
rc = gpgme_op_decrypt(mc->ctx, dh_crypto, dh_plain);
274
if (rc != GPG_ERR_NO_ERROR){
281
if(rc != GPG_ERR_NO_ERROR){
275
282
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
276
283
gpgme_strsource(rc), gpgme_strerror(rc));
277
284
plaintext_length = -1;
278
if (debug){
285
if(debug){
279
286
gpgme_decrypt_result_t result;
280
287
result = gpgme_op_decrypt_result(mc->ctx);
281
if (result == NULL){
288
if(result == NULL){
282
289
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
283
290
} else {
284
291
fprintf(stderr, "Unsupported algorithm: %s\n",
311
318
}
312
319
313
320
/* Seek back to the beginning of the GPGME plaintext data buffer */
314
if (gpgme_data_seek(dh_plain, (off_t) 0, SEEK_SET) == -1){
321
if(gpgme_data_seek(dh_plain, (off_t)0, SEEK_SET) == -1){
315
322
perror("gpgme_data_seek");
316
323
plaintext_length = -1;
317
324
goto decrypt_end;
322
329
plaintext_capacity = adjustbuffer(plaintext,
323
330
(size_t)plaintext_length,
324
331
plaintext_capacity);
325
if (plaintext_capacity == 0){
332
if(plaintext_capacity == 0){
326
333
perror("adjustbuffer");
327
334
plaintext_length = -1;
328
335
goto decrypt_end;
331
338
ret = gpgme_data_read(dh_plain, *plaintext + plaintext_length,
332
339
BUFFER_SIZE);
333
340
/* Print the data, if any */
334
if (ret == 0){
341
if(ret == 0){
335
342
/* EOF */
336
343
break;
337
344
}
361
368
return plaintext_length;
362
369
}
363
370
364
static const char * safer_gnutls_strerror (int value) {
365
const char *ret = gnutls_strerror (value); /* Spurious warning */
366
if (ret == NULL)
371
static const char * safer_gnutls_strerror(int value){
372
const char *ret = gnutls_strerror(value); /* Spurious warning from
373
-Wunreachable-code */
374
if(ret == NULL)
367
375
ret = "(unknown)";
368
376
return ret;
369
377
}
384
392
}
385
393
386
394
ret = gnutls_global_init();
387
if (ret != GNUTLS_E_SUCCESS) {
388
fprintf (stderr, "GnuTLS global_init: %s\n",
389
safer_gnutls_strerror(ret));
395
if(ret != GNUTLS_E_SUCCESS){
396
fprintf(stderr, "GnuTLS global_init: %s\n",
397
safer_gnutls_strerror(ret));
390
398
return -1;
391
399
}
392
400
393
if (debug){
401
if(debug){
394
402
/* "Use a log level over 10 to enable all debugging options."
395
403
* - GnuTLS manual
396
404
*/
400
408
401
409
/* OpenPGP credentials */
402
410
gnutls_certificate_allocate_credentials(&mc->cred);
403
if (ret != GNUTLS_E_SUCCESS){
404
fprintf (stderr, "GnuTLS memory error: %s\n", /* Spurious
405
warning */
406
safer_gnutls_strerror(ret));
407
gnutls_global_deinit ();
411
if(ret != GNUTLS_E_SUCCESS){
412
fprintf(stderr, "GnuTLS memory error: %s\n", /* Spurious warning
413
from
414
-Wunreachable-code
415
*/
416
safer_gnutls_strerror(ret));
417
gnutls_global_deinit();
408
418
return -1;
409
419
}
410
420
417
427
ret = gnutls_certificate_set_openpgp_key_file
418
428
(mc->cred, pubkeyfilename, seckeyfilename,
419
429
GNUTLS_OPENPGP_FMT_BASE64);
420
if (ret != GNUTLS_E_SUCCESS) {
430
if(ret != GNUTLS_E_SUCCESS){
421
431
fprintf(stderr,
422
432
"Error[%d] while reading the OpenPGP key pair ('%s',"
423
433
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
428
438
429
439
/* GnuTLS server initialization */
430
440
ret = gnutls_dh_params_init(&mc->dh_params);
431
if (ret != GNUTLS_E_SUCCESS) {
432
fprintf (stderr, "Error in GnuTLS DH parameter initialization:"
433
" %s\n", safer_gnutls_strerror(ret));
441
if(ret != GNUTLS_E_SUCCESS){
442
fprintf(stderr, "Error in GnuTLS DH parameter initialization:"
443
" %s\n", safer_gnutls_strerror(ret));
434
444
goto globalfail;
435
445
}
436
446
ret = gnutls_dh_params_generate2(mc->dh_params, mc->dh_bits);
437
if (ret != GNUTLS_E_SUCCESS) {
438
fprintf (stderr, "Error in GnuTLS prime generation: %s\n",
439
safer_gnutls_strerror(ret));
447
if(ret != GNUTLS_E_SUCCESS){
448
fprintf(stderr, "Error in GnuTLS prime generation: %s\n",
449
safer_gnutls_strerror(ret));
440
450
goto globalfail;
441
451
}
442
452
457
467
int ret;
458
468
/* GnuTLS session creation */
459
469
ret = gnutls_init(session, GNUTLS_SERVER);
460
if (ret != GNUTLS_E_SUCCESS){
470
if(ret != GNUTLS_E_SUCCESS){
461
471
fprintf(stderr, "Error in GnuTLS session initialization: %s\n",
462
472
safer_gnutls_strerror(ret));
463
473
}
465
475
{
466
476
const char *err;
467
477
ret = gnutls_priority_set_direct(*session, mc->priority, &err);
468
if (ret != GNUTLS_E_SUCCESS) {
478
if(ret != GNUTLS_E_SUCCESS){
469
479
fprintf(stderr, "Syntax error at: %s\n", err);
470
480
fprintf(stderr, "GnuTLS error: %s\n",
471
481
safer_gnutls_strerror(ret));
472
gnutls_deinit (*session);
482
gnutls_deinit(*session);
473
483
return -1;
474
484
}
475
485
}
476
486
477
487
ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,
478
488
mc->cred);
479
if (ret != GNUTLS_E_SUCCESS) {
489
if(ret != GNUTLS_E_SUCCESS){
480
490
fprintf(stderr, "Error setting GnuTLS credentials: %s\n",
481
491
safer_gnutls_strerror(ret));
482
gnutls_deinit (*session);
492
gnutls_deinit(*session);
483
493
return -1;
484
494
}
485
495
486
496
/* ignore client certificate if any. */
487
gnutls_certificate_server_set_request (*session,
488
GNUTLS_CERT_IGNORE);
497
gnutls_certificate_server_set_request(*session,
498
GNUTLS_CERT_IGNORE);
489
499
490
gnutls_dh_set_prime_bits (*session, mc->dh_bits);
500
gnutls_dh_set_prime_bits(*session, mc->dh_bits);
491
501
492
502
return 0;
493
503
}
499
509
/* Called when a Mandos server is found */
500
510
static int start_mandos_communication(const char *ip, uint16_t port,
501
511
AvahiIfIndex if_index,
502
mandos_context *mc){
512
mandos_context *mc, int af){
503
513
int ret, tcp_sd;
504
514
ssize_t sret;
505
union { struct sockaddr in; struct sockaddr_in6 in6; } to;
515
union {
516
struct sockaddr_in in;
517
struct sockaddr_in6 in6;
518
} to;
506
519
char *buffer = NULL;
507
520
char *decrypted_buffer;
508
521
size_t buffer_length = 0;
510
523
ssize_t decrypted_buffer_size;
511
524
size_t written;
512
525
int retval = 0;
513
char interface[IF_NAMESIZE];
514
526
gnutls_session_t session;
515
516
ret = init_gnutls_session (mc, &session);
517
if (ret != 0){
527
int pf; /* Protocol family */
528
529
switch(af){
530
case AF_INET6:
531
pf = PF_INET6;
532
break;
533
case AF_INET:
534
pf = PF_INET;
535
break;
536
default:
537
fprintf(stderr, "Bad address family: %d\n", af);
538
return -1;
539
}
540
541
ret = init_gnutls_session(mc, &session);
542
if(ret != 0){
518
543
return -1;
519
544
}
520
545
521
546
if(debug){
522
fprintf(stderr, "Setting up a tcp connection to %s, port %" PRIu16
547
fprintf(stderr, "Setting up a TCP connection to %s, port %" PRIu16
523
548
"\n", ip, port);
524
549
}
525
550
526
tcp_sd = socket(PF_INET6, SOCK_STREAM, 0);
527
if(tcp_sd < 0) {
551
tcp_sd = socket(pf, SOCK_STREAM, 0);
552
if(tcp_sd < 0){
528
553
perror("socket");
529
554
return -1;
530
555
}
531
556
532
if(debug){
533
if(if_indextoname((unsigned int)if_index, interface) == NULL){
534
perror("if_indextoname");
535
return -1;
536
}
537
fprintf(stderr, "Binding to interface %s\n", interface);
538
}
539
540
557
memset(&to, 0, sizeof(to));
541
to.in6.sin6_family = AF_INET6;
542
/* It would be nice to have a way to detect if we were passed an
543
IPv4 address here. Now we assume an IPv6 address. */
544
ret = inet_pton(AF_INET6, ip, &to.in6.sin6_addr);
545
if (ret < 0 ){
558
if(af == AF_INET6){
559
to.in6.sin6_family = (uint16_t)af;
560
ret = inet_pton(af, ip, &to.in6.sin6_addr);
561
} else { /* IPv4 */
562
to.in.sin_family = (sa_family_t)af;
563
ret = inet_pton(af, ip, &to.in.sin_addr);
564
}
565
if(ret < 0 ){
546
566
perror("inet_pton");
547
567
return -1;
548
568
}
550
570
fprintf(stderr, "Bad address: %s\n", ip);
551
571
return -1;
552
572
}
553
to.in6.sin6_port = htons(port); /* Spurious warning */
554
555
to.in6.sin6_scope_id = (uint32_t)if_index;
573
if(af == AF_INET6){
574
to.in6.sin6_port = htons(port); /* Spurious warnings from
575
-Wconversion and
576
-Wunreachable-code */
577
578
if(IN6_IS_ADDR_LINKLOCAL /* Spurious warnings from */
579
(&to.in6.sin6_addr)){ /* -Wstrict-aliasing=2 or lower and
580
-Wunreachable-code*/
581
if(if_index == AVAHI_IF_UNSPEC){
582
fprintf(stderr, "An IPv6 link-local address is incomplete"
583
" without a network interface\n");
584
return -1;
585
}
586
/* Set the network interface number as scope */
587
to.in6.sin6_scope_id = (uint32_t)if_index;
588
}
589
} else {
590
to.in.sin_port = htons(port); /* Spurious warnings from
591
-Wconversion and
592
-Wunreachable-code */
593
}
556
594
557
595
if(debug){
558
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
559
port);
560
char addrstr[INET6_ADDRSTRLEN] = "";
561
if(inet_ntop(to.in6.sin6_family, &(to.in6.sin6_addr), addrstr,
562
sizeof(addrstr)) == NULL){
596
if(af == AF_INET6 and if_index != AVAHI_IF_UNSPEC){
597
char interface[IF_NAMESIZE];
598
if(if_indextoname((unsigned int)if_index, interface) == NULL){
599
perror("if_indextoname");
600
} else {
601
fprintf(stderr, "Connection to: %s%%%s, port %" PRIu16 "\n",
602
ip, interface, port);
603
}
604
} else {
605
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
606
port);
607
}
608
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
609
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
610
const char *pcret;
611
if(af == AF_INET6){
612
pcret = inet_ntop(af, &(to.in6.sin6_addr), addrstr,
613
sizeof(addrstr));
614
} else {
615
pcret = inet_ntop(af, &(to.in.sin_addr), addrstr,
616
sizeof(addrstr));
617
}
618
if(pcret == NULL){
563
619
perror("inet_ntop");
564
620
} else {
565
621
if(strcmp(addrstr, ip) != 0){
568
624
}
569
625
}
570
626
571
ret = connect(tcp_sd, &to.in, sizeof(to));
572
if (ret < 0){
627
if(af == AF_INET6){
628
ret = connect(tcp_sd, &to.in6, sizeof(to));
629
} else {
630
ret = connect(tcp_sd, &to.in, sizeof(to)); /* IPv4 */
631
}
632
if(ret < 0){
573
633
perror("connect");
574
634
return -1;
575
635
}
576
636
577
637
const char *out = mandos_protocol_version;
578
638
written = 0;
579
while (true){
639
while(true){
580
640
size_t out_size = strlen(out);
581
641
ret = (int)TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
582
642
out_size - written));
583
if (ret == -1){
643
if(ret == -1){
584
644
perror("write");
585
645
retval = -1;
586
646
goto mandos_end;
589
649
if(written < out_size){
590
650
continue;
591
651
} else {
592
if (out == mandos_protocol_version){
652
if(out == mandos_protocol_version){
593
653
written = 0;
594
654
out = "\r\n";
595
655
} else {
602
662
fprintf(stderr, "Establishing TLS session with %s\n", ip);
603
663
}
604
664
605
gnutls_transport_set_ptr (session, (gnutls_transport_ptr_t) tcp_sd);
665
gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t) tcp_sd);
606
666
607
667
do{
608
ret = gnutls_handshake (session);
668
ret = gnutls_handshake(session);
609
669
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
610
670
611
if (ret != GNUTLS_E_SUCCESS){
671
if(ret != GNUTLS_E_SUCCESS){
612
672
if(debug){
613
673
fprintf(stderr, "*** GnuTLS Handshake failed ***\n");
614
gnutls_perror (ret);
674
gnutls_perror(ret);
615
675
}
616
676
retval = -1;
617
677
goto mandos_end;
620
680
/* Read OpenPGP packet that contains the wanted password */
621
681
622
682
if(debug){
623
fprintf(stderr, "Retrieving pgp encrypted password from %s\n",
683
fprintf(stderr, "Retrieving OpenPGP encrypted password from %s\n",
624
684
ip);
625
685
}
626
686
627
687
while(true){
628
688
buffer_capacity = adjustbuffer(&buffer, buffer_length,
629
689
buffer_capacity);
630
if (buffer_capacity == 0){
690
if(buffer_capacity == 0){
631
691
perror("adjustbuffer");
632
692
retval = -1;
633
693
goto mandos_end;
635
695
636
696
sret = gnutls_record_recv(session, buffer+buffer_length,
637
697
BUFFER_SIZE);
638
if (sret == 0){
698
if(sret == 0){
639
699
break;
640
700
}
641
if (sret < 0){
701
if(sret < 0){
642
702
switch(sret){
643
703
case GNUTLS_E_INTERRUPTED:
644
704
case GNUTLS_E_AGAIN:
645
705
break;
646
706
case GNUTLS_E_REHANDSHAKE:
647
707
do{
648
ret = gnutls_handshake (session);
708
ret = gnutls_handshake(session);
649
709
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
650
if (ret < 0){
710
if(ret < 0){
651
711
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
652
gnutls_perror (ret);
712
gnutls_perror(ret);
653
713
retval = -1;
654
714
goto mandos_end;
655
715
}
658
718
fprintf(stderr, "Unknown error while reading data from"
659
719
" encrypted session with Mandos server\n");
660
720
retval = -1;
661
gnutls_bye (session, GNUTLS_SHUT_RDWR);
721
gnutls_bye(session, GNUTLS_SHUT_RDWR);
662
722
goto mandos_end;
663
723
}
664
724
} else {
670
730
fprintf(stderr, "Closing TLS session\n");
671
731
}
672
732
673
gnutls_bye (session, GNUTLS_SHUT_RDWR);
733
gnutls_bye(session, GNUTLS_SHUT_RDWR);
674
734
675
if (buffer_length > 0){
735
if(buffer_length > 0){
676
736
decrypted_buffer_size = pgp_packet_decrypt(mc, buffer,
677
737
buffer_length,
678
738
&decrypted_buffer);
679
if (decrypted_buffer_size >= 0){
739
if(decrypted_buffer_size >= 0){
680
740
written = 0;
681
741
while(written < (size_t) decrypted_buffer_size){
682
ret = (int)fwrite (decrypted_buffer + written, 1,
683
(size_t)decrypted_buffer_size - written,
684
stdout);
742
ret = (int)fwrite(decrypted_buffer + written, 1,
743
(size_t)decrypted_buffer_size - written,
744
stdout);
685
745
if(ret == 0 and ferror(stdout)){
686
746
if(debug){
687
747
fprintf(stderr, "Error writing encrypted data: %s\n",
708
768
if(ret == -1){
709
769
perror("close");
710
770
}
711
gnutls_deinit (session);
771
gnutls_deinit(session);
712
772
return retval;
713
773
}
714
774
715
775
static void resolve_callback(AvahiSServiceResolver *r,
716
776
AvahiIfIndex interface,
717
AVAHI_GCC_UNUSED AvahiProtocol protocol,
777
AvahiProtocol proto,
718
778
AvahiResolverEvent event,
719
779
const char *name,
720
780
const char *type,
725
785
AVAHI_GCC_UNUSED AvahiStringList *txt,
726
786
AVAHI_GCC_UNUSED AvahiLookupResultFlags
727
787
flags,
728
void* userdata) {
788
void* userdata){
729
789
mandos_context *mc = userdata;
730
790
assert(r);
731
791
732
792
/* Called whenever a service has been resolved successfully or
733
793
timed out */
734
794
735
switch (event) {
795
switch(event){
736
796
default:
737
797
case AVAHI_RESOLVER_FAILURE:
738
798
fprintf(stderr, "(Avahi Resolver) Failed to resolve service '%s'"
746
806
avahi_address_snprint(ip, sizeof(ip), address);
747
807
if(debug){
748
808
fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %"
749
PRIu16 ") on port %d\n", name, host_name, ip,
750
interface, port);
809
PRIdMAX ") on port %" PRIu16 "\n", name, host_name,
810
ip, (intmax_t)interface, port);
751
811
}
752
int ret = start_mandos_communication(ip, port, interface, mc);
753
if (ret == 0){
812
int ret = start_mandos_communication(ip, port, interface, mc,
813
avahi_proto_to_af(proto));
814
if(ret == 0){
754
815
avahi_simple_poll_quit(mc->simple_poll);
755
816
}
756
817
}
758
819
avahi_s_service_resolver_free(r);
759
820
}
760
821
761
static void browse_callback( AvahiSServiceBrowser *b,
762
AvahiIfIndex interface,
763
AvahiProtocol protocol,
764
AvahiBrowserEvent event,
765
const char *name,
766
const char *type,
767
const char *domain,
768
AVAHI_GCC_UNUSED AvahiLookupResultFlags
769
flags,
770
void* userdata) {
822
static void browse_callback(AvahiSServiceBrowser *b,
823
AvahiIfIndex interface,
824
AvahiProtocol protocol,
825
AvahiBrowserEvent event,
826
const char *name,
827
const char *type,
828
const char *domain,
829
AVAHI_GCC_UNUSED AvahiLookupResultFlags
830
flags,
831
void* userdata){
771
832
mandos_context *mc = userdata;
772
833
assert(b);
773
834
774
835
/* Called whenever a new services becomes available on the LAN or
775
836
is removed from the LAN */
776
837
777
switch (event) {
838
switch(event){
778
839
default:
779
840
case AVAHI_BROWSER_FAILURE:
780
841
789
850
the callback function is called the Avahi server will free the
790
851
resolver for us. */
791
852
792
if (!(avahi_s_service_resolver_new(mc->server, interface,
853
if(!(avahi_s_service_resolver_new(mc->server, interface,
793
854
protocol, name, type, domain,
794
855
AVAHI_PROTO_INET6, 0,
795
856
resolve_callback, mc)))
810
871
}
811
872
812
873
int main(int argc, char *argv[]){
813
AvahiSServiceBrowser *sb = NULL;
814
int error;
815
int ret;
816
int exitcode = EXIT_SUCCESS;
817
const char *interface = "eth0";
818
struct ifreq network;
819
int sd;
820
uid_t uid;
821
gid_t gid;
822
char *connect_to = NULL;
823
char tempdir[] = "/tmp/mandosXXXXXX";
824
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
825
const char *seckey = PATHDIR "/" SECKEY;
826
const char *pubkey = PATHDIR "/" PUBKEY;
827
828
mandos_context mc = { .simple_poll = NULL, .server = NULL,
829
.dh_bits = 1024, .priority = "SECURE256"
830
":!CTYPE-X.509:+CTYPE-OPENPGP" };
831
bool gnutls_initalized = false;
832
bool gpgme_initalized = false;
833
834
{
835
struct argp_option options[] = {
836
{ .name = "debug", .key = 128,
837
.doc = "Debug mode", .group = 3 },
838
{ .name = "connect", .key = 'c',
839
.arg = "ADDRESS:PORT",
840
.doc = "Connect directly to a specific Mandos server",
841
.group = 1 },
842
{ .name = "interface", .key = 'i',
843
.arg = "NAME",
844
.doc = "Interface that will be used to search for Mandos"
845
" servers",
846
.group = 1 },
847
{ .name = "seckey", .key = 's',
848
.arg = "FILE",
849
.doc = "OpenPGP secret key file base name",
850
.group = 1 },
851
{ .name = "pubkey", .key = 'p',
852
.arg = "FILE",
853
.doc = "OpenPGP public key file base name",
854
.group = 2 },
855
{ .name = "dh-bits", .key = 129,
856
.arg = "BITS",
857
.doc = "Bit length of the prime number used in the"
858
" Diffie-Hellman key exchange",
859
.group = 2 },
860
{ .name = "priority", .key = 130,
861
.arg = "STRING",
862
.doc = "GnuTLS priority string for the TLS handshake",
863
.group = 1 },
864
{ .name = NULL }
865
};
866
867
error_t parse_opt (int key, char *arg,
868
struct argp_state *state) {
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
ret = sscanf(arg, "%u", &mc.dh_bits);
887
if(ret != 1){
888
fprintf(stderr, "Bad number of DH bits\n");
889
exit(EXIT_FAILURE);
874
AvahiSServiceBrowser *sb = NULL;
875
int error;
876
int ret;
877
intmax_t tmpmax;
878
int numchars;
879
int exitcode = EXIT_SUCCESS;
880
const char *interface = "eth0";
881
struct ifreq network;
882
int sd;
883
uid_t uid;
884
gid_t gid;
885
char *connect_to = NULL;
886
char tempdir[] = "/tmp/mandosXXXXXX";
887
bool tempdir_created = false;
888
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
889
const char *seckey = PATHDIR "/" SECKEY;
890
const char *pubkey = PATHDIR "/" PUBKEY;
891
892
mandos_context mc = { .simple_poll = NULL, .server = NULL,
893
.dh_bits = 1024, .priority = "SECURE256"
894
":!CTYPE-X.509:+CTYPE-OPENPGP" };
895
bool gnutls_initialized = false;
896
bool gpgme_initialized = false;
897
double delay = 2.5;
898
899
{
900
struct argp_option options[] = {
901
{ .name = "debug", .key = 128,
902
.doc = "Debug mode", .group = 3 },
903
{ .name = "connect", .key = 'c',
904
.arg = "ADDRESS:PORT",
905
.doc = "Connect directly to a specific Mandos server",
906
.group = 1 },
907
{ .name = "interface", .key = 'i',
908
.arg = "NAME",
909
.doc = "Network interface that will be used to search for"
910
" Mandos servers",
911
.group = 1 },
912
{ .name = "seckey", .key = 's',
913
.arg = "FILE",
914
.doc = "OpenPGP secret key file base name",
915
.group = 1 },
916
{ .name = "pubkey", .key = 'p',
917
.arg = "FILE",
918
.doc = "OpenPGP public key file base name",
919
.group = 2 },
920
{ .name = "dh-bits", .key = 129,
921
.arg = "BITS",
922
.doc = "Bit length of the prime number used in the"
923
" Diffie-Hellman key exchange",
924
.group = 2 },
925
{ .name = "priority", .key = 130,
926
.arg = "STRING",
927
.doc = "GnuTLS priority string for the TLS handshake",
928
.group = 1 },
929
{ .name = "delay", .key = 131,
930
.arg = "SECONDS",
931
.doc = "Maximum delay to wait for interface startup",
932
.group = 2 },
933
{ .name = NULL }
934
};
935
936
error_t parse_opt(int key, char *arg,
937
struct argp_state *state){
938
switch(key){
939
case 128: /* --debug */
940
debug = true;
941
break;
942
case 'c': /* --connect */
943
connect_to = arg;
944
break;
945
case 'i': /* --interface */
946
interface = arg;
947
break;
948
case 's': /* --seckey */
949
seckey = arg;
950
break;
951
case 'p': /* --pubkey */
952
pubkey = arg;
953
break;
954
case 129: /* --dh-bits */
955
ret = sscanf(arg, "%" SCNdMAX "%n", &tmpmax, &numchars);
956
if(ret < 1 or tmpmax != (typeof(mc.dh_bits))tmpmax
957
or arg[numchars] != '\0'){
958
fprintf(stderr, "Bad number of DH bits\n");
959
exit(EXIT_FAILURE);
960
}
961
mc.dh_bits = (typeof(mc.dh_bits))tmpmax;
962
break;
963
case 130: /* --priority */
964
mc.priority = arg;
965
break;
966
case 131: /* --delay */
967
ret = sscanf(arg, "%lf%n", &delay, &numchars);
968
if(ret < 1 or arg[numchars] != '\0'){
969
fprintf(stderr, "Bad delay\n");
970
exit(EXIT_FAILURE);
971
}
972
break;
973
case ARGP_KEY_ARG:
974
argp_usage(state);
975
case ARGP_KEY_END:
976
break;
977
default:
978
return ARGP_ERR_UNKNOWN;
979
}
980
return 0;
981
}
982
983
struct argp argp = { .options = options, .parser = parse_opt,
984
.args_doc = "",
985
.doc = "Mandos client -- Get and decrypt"
986
" passwords from a Mandos server" };
987
ret = argp_parse(&argp, argc, argv, 0, 0, NULL);
988
if(ret == ARGP_ERR_UNKNOWN){
989
fprintf(stderr, "Unknown error while parsing arguments\n");
990
exitcode = EXIT_FAILURE;
991
goto end;
992
}
993
}
994
995
/* If the interface is down, bring it up */
996
if(interface[0] != '\0'){
997
#ifdef __linux__
998
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
999
messages to mess up the prompt */
1000
ret = klogctl(8, NULL, 5);
1001
bool restore_loglevel = true;
1002
if(ret == -1){
1003
restore_loglevel = false;
1004
perror("klogctl");
1005
}
1006
#endif
1007
1008
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1009
if(sd < 0){
1010
perror("socket");
1011
exitcode = EXIT_FAILURE;
1012
#ifdef __linux__
1013
if(restore_loglevel){
1014
ret = klogctl(7, NULL, 0);
1015
if(ret == -1){
1016
perror("klogctl");
1017
}
1018
}
1019
#endif
1020
goto end;
1021
}
1022
strcpy(network.ifr_name, interface);
1023
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1024
if(ret == -1){
1025
perror("ioctl SIOCGIFFLAGS");
1026
#ifdef __linux__
1027
if(restore_loglevel){
1028
ret = klogctl(7, NULL, 0);
1029
if(ret == -1){
1030
perror("klogctl");
1031
}
1032
}
1033
#endif
1034
exitcode = EXIT_FAILURE;
1035
goto end;
1036
}
1037
if((network.ifr_flags & IFF_UP) == 0){
1038
network.ifr_flags |= IFF_UP;
1039
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1040
if(ret == -1){
1041
perror("ioctl SIOCSIFFLAGS");
1042
exitcode = EXIT_FAILURE;
1043
#ifdef __linux__
1044
if(restore_loglevel){
1045
ret = klogctl(7, NULL, 0);
1046
if(ret == -1){
1047
perror("klogctl");
890
1048
}
891
break;
892
case 130: /* --priority */
893
mc.priority = arg;
894
break;
895
case ARGP_KEY_ARG:
896
argp_usage (state);
897
case ARGP_KEY_END:
898
break;
899
default:
900
return ARGP_ERR_UNKNOWN;
901
1049
}
902
return 0;
903
}
904
905
struct argp argp = { .options = options, .parser = parse_opt,
906
.args_doc = "",
907
.doc = "Mandos client -- Get and decrypt"
908
" passwords from a Mandos server" };
909
ret = argp_parse (&argp, argc, argv, 0, 0, NULL);
910
if (ret == ARGP_ERR_UNKNOWN){
911
fprintf(stderr, "Unknown error while parsing arguments\n");
912
exitcode = EXIT_FAILURE;
1050
#endif
913
1051
goto end;
914
1052
}
915
1053
}
916
917
/* If the interface is down, bring it up */
918
{
919
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
920
if(sd < 0) {
921
perror("socket");
922
exitcode = EXIT_FAILURE;
923
goto end;
924
}
925
strcpy(network.ifr_name, interface);
1054
/* sleep checking until interface is running */
1055
for(int i=0; i < delay * 4; i++){
926
1056
ret = ioctl(sd, SIOCGIFFLAGS, &network);
927
1057
if(ret == -1){
928
1058
perror("ioctl SIOCGIFFLAGS");
929
exitcode = EXIT_FAILURE;
930
goto end;
931
}
932
if((network.ifr_flags & IFF_UP) == 0){
933
network.ifr_flags |= IFF_UP;
934
ret = ioctl(sd, SIOCSIFFLAGS, &network);
935
if(ret == -1){
936
perror("ioctl SIOCSIFFLAGS");
937
exitcode = EXIT_FAILURE;
938
goto end;
939
}
940
}
941
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1059
} else if(network.ifr_flags & IFF_RUNNING){
1060
break;
1061
}
1062
struct timespec sleeptime = { .tv_nsec = 250000000 };
1063
ret = nanosleep(&sleeptime, NULL);
1064
if(ret == -1 and errno != EINTR){
1065
perror("nanosleep");
1066
}
1067
}
1068
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1069
if(ret == -1){
1070
perror("close");
1071
}
1072
#ifdef __linux__
1073
if(restore_loglevel){
1074
/* Restores kernel loglevel to default */
1075
ret = klogctl(7, NULL, 0);
942
1076
if(ret == -1){
943
perror("close");
1077
perror("klogctl");
944
1078
}
945
1079
}
946
947
uid = getuid();
948
gid = getgid();
949
950
ret = setuid(uid);
951
if (ret == -1){
952
perror("setuid");
953
}
954
955
setgid(gid);
956
if (ret == -1){
957
perror("setgid");
958
}
959
960
ret = init_gnutls_global(&mc, pubkey, seckey);
961
if (ret == -1){
962
fprintf(stderr, "init_gnutls_global failed\n");
963
exitcode = EXIT_FAILURE;
964
goto end;
965
} else {
966
gnutls_initalized = true;
967
}
968
969
if(mkdtemp(tempdir) == NULL){
970
perror("mkdtemp");
971
tempdir[0] = '\0';
972
goto end;
973
}
974
975
if(not init_gpgme(&mc, pubkey, seckey, tempdir)){
976
fprintf(stderr, "gpgme_initalized failed\n");
977
exitcode = EXIT_FAILURE;
978
goto end;
979
} else {
980
gpgme_initalized = true;
981
}
982
1080
#endif
1081
}
1082
1083
uid = getuid();
1084
gid = getgid();
1085
1086
errno = 0;
1087
setgid(gid);
1088
if(ret == -1){
1089
perror("setgid");
1090
}
1091
1092
ret = setuid(uid);
1093
if(ret == -1){
1094
perror("setuid");
1095
}
1096
1097
ret = init_gnutls_global(&mc, pubkey, seckey);
1098
if(ret == -1){
1099
fprintf(stderr, "init_gnutls_global failed\n");
1100
exitcode = EXIT_FAILURE;
1101
goto end;
1102
} else {
1103
gnutls_initialized = true;
1104
}
1105
1106
if(mkdtemp(tempdir) == NULL){
1107
perror("mkdtemp");
1108
goto end;
1109
}
1110
tempdir_created = true;
1111
1112
if(not init_gpgme(&mc, pubkey, seckey, tempdir)){
1113
fprintf(stderr, "init_gpgme failed\n");
1114
exitcode = EXIT_FAILURE;
1115
goto end;
1116
} else {
1117
gpgme_initialized = true;
1118
}
1119
1120
if(interface[0] != '\0'){
983
1121
if_index = (AvahiIfIndex) if_nametoindex(interface);
984
1122
if(if_index == 0){
985
1123
fprintf(stderr, "No such interface: \"%s\"\n", interface);
986
exit(EXIT_FAILURE);
987
}
988
989
if(connect_to != NULL){
990
/* Connect directly, do not use Zeroconf */
991
/* (Mainly meant for debugging) */
992
char *address = strrchr(connect_to, ':');
993
if(address == NULL){
994
fprintf(stderr, "No colon in address\n");
995
exitcode = EXIT_FAILURE;
996
goto end;
997
}
998
uint16_t port;
999
ret = sscanf(address+1, "%" SCNu16, &port);
1000
if(ret != 1){
1001
fprintf(stderr, "Bad port number\n");
1002
exitcode = EXIT_FAILURE;
1003
goto end;
1004
}
1005
*address = '\0';
1006
address = connect_to;
1007
ret = start_mandos_communication(address, port, if_index, &mc);
1008
if(ret < 0){
1009
exitcode = EXIT_FAILURE;
1010
} else {
1011
exitcode = EXIT_SUCCESS;
1012
}
1013
goto end;
1014
}
1015
1016
if (not debug){
1017
avahi_set_log_function(empty_log);
1018
}
1019
1020
/* Initialize the pseudo-RNG for Avahi */
1021
srand((unsigned int) time(NULL));
1022
1023
/* Allocate main Avahi loop object */
1024
mc.simple_poll = avahi_simple_poll_new();
1025
if (mc.simple_poll == NULL) {
1026
fprintf(stderr, "Avahi: Failed to create simple poll"
1027
" object.\n");
1028
exitcode = EXIT_FAILURE;
1029
goto end;
1030
}
1031
1032
{
1033
AvahiServerConfig config;
1034
/* Do not publish any local Zeroconf records */
1035
avahi_server_config_init(&config);
1036
config.publish_hinfo = 0;
1037
config.publish_addresses = 0;
1038
config.publish_workstation = 0;
1039
config.publish_domain = 0;
1040
1041
/* Allocate a new server */
1042
mc.server = avahi_server_new(avahi_simple_poll_get
1043
(mc.simple_poll), &config, NULL,
1044
NULL, &error);
1045
1046
/* Free the Avahi configuration data */
1047
avahi_server_config_free(&config);
1048
}
1049
1050
/* Check if creating the Avahi server object succeeded */
1051
if (mc.server == NULL) {
1052
fprintf(stderr, "Failed to create Avahi server: %s\n",
1053
avahi_strerror(error));
1054
exitcode = EXIT_FAILURE;
1055
goto end;
1056
}
1057
1058
/* Create the Avahi service browser */
1059
sb = avahi_s_service_browser_new(mc.server, if_index,
1060
AVAHI_PROTO_INET6,
1061
"_mandos._tcp", NULL, 0,
1062
browse_callback, &mc);
1063
if (sb == NULL) {
1064
fprintf(stderr, "Failed to create service browser: %s\n",
1065
avahi_strerror(avahi_server_errno(mc.server)));
1066
exitcode = EXIT_FAILURE;
1067
goto end;
1068
}
1069
1070
/* Run the main loop */
1071
1072
if (debug){
1073
fprintf(stderr, "Starting Avahi loop search\n");
1074
}
1075
1076
avahi_simple_poll_loop(mc.simple_poll);
1077
1124
exitcode = EXIT_FAILURE;
1125
goto end;
1126
}
1127
}
1128
1129
if(connect_to != NULL){
1130
/* Connect directly, do not use Zeroconf */
1131
/* (Mainly meant for debugging) */
1132
char *address = strrchr(connect_to, ':');
1133
if(address == NULL){
1134
fprintf(stderr, "No colon in address\n");
1135
exitcode = EXIT_FAILURE;
1136
goto end;
1137
}
1138
uint16_t port;
1139
ret = sscanf(address+1, "%" SCNdMAX "%n", &tmpmax, &numchars);
1140
if(ret < 1 or tmpmax != (uint16_t)tmpmax
1141
or address[numchars+1] != '\0'){
1142
fprintf(stderr, "Bad port number\n");
1143
exitcode = EXIT_FAILURE;
1144
goto end;
1145
}
1146
port = (uint16_t)tmpmax;
1147
*address = '\0';
1148
address = connect_to;
1149
/* Colon in address indicates IPv6 */
1150
int af;
1151
if(strchr(address, ':') != NULL){
1152
af = AF_INET6;
1153
} else {
1154
af = AF_INET;
1155
}
1156
ret = start_mandos_communication(address, port, if_index, &mc,
1157
af);
1158
if(ret < 0){
1159
exitcode = EXIT_FAILURE;
1160
} else {
1161
exitcode = EXIT_SUCCESS;
1162
}
1163
goto end;
1164
}
1165
1166
if(not debug){
1167
avahi_set_log_function(empty_log);
1168
}
1169
1170
/* Initialize the pseudo-RNG for Avahi */
1171
srand((unsigned int) time(NULL));
1172
1173
/* Allocate main Avahi loop object */
1174
mc.simple_poll = avahi_simple_poll_new();
1175
if(mc.simple_poll == NULL){
1176
fprintf(stderr, "Avahi: Failed to create simple poll object.\n");
1177
exitcode = EXIT_FAILURE;
1178
goto end;
1179
}
1180
1181
{
1182
AvahiServerConfig config;
1183
/* Do not publish any local Zeroconf records */
1184
avahi_server_config_init(&config);
1185
config.publish_hinfo = 0;
1186
config.publish_addresses = 0;
1187
config.publish_workstation = 0;
1188
config.publish_domain = 0;
1189
1190
/* Allocate a new server */
1191
mc.server = avahi_server_new(avahi_simple_poll_get
1192
(mc.simple_poll), &config, NULL,
1193
NULL, &error);
1194
1195
/* Free the Avahi configuration data */
1196
avahi_server_config_free(&config);
1197
}
1198
1199
/* Check if creating the Avahi server object succeeded */
1200
if(mc.server == NULL){
1201
fprintf(stderr, "Failed to create Avahi server: %s\n",
1202
avahi_strerror(error));
1203
exitcode = EXIT_FAILURE;
1204
goto end;
1205
}
1206
1207
/* Create the Avahi service browser */
1208
sb = avahi_s_service_browser_new(mc.server, if_index,
1209
AVAHI_PROTO_INET6, "_mandos._tcp",
1210
NULL, 0, browse_callback, &mc);
1211
if(sb == NULL){
1212
fprintf(stderr, "Failed to create service browser: %s\n",
1213
avahi_strerror(avahi_server_errno(mc.server)));
1214
exitcode = EXIT_FAILURE;
1215
goto end;
1216
}
1217
1218
/* Run the main loop */
1219
1220
if(debug){
1221
fprintf(stderr, "Starting Avahi loop search\n");
1222
}
1223
1224
avahi_simple_poll_loop(mc.simple_poll);
1225
1078
1226
end:
1079
1080
if (debug){
1081
fprintf(stderr, "%s exiting\n", argv[0]);
1082
}
1083
1084
/* Cleanup things */
1085
if (sb != NULL)
1086
avahi_s_service_browser_free(sb);
1087
1088
if (mc.server != NULL)
1089
avahi_server_free(mc.server);
1090
1091
if (mc.simple_poll != NULL)
1092
avahi_simple_poll_free(mc.simple_poll);
1093
1094
if (gnutls_initalized){
1095
gnutls_certificate_free_credentials(mc.cred);
1096
gnutls_global_deinit ();
1097
gnutls_dh_params_deinit(mc.dh_params);
1098
}
1099
1100
if(gpgme_initalized){
1101
gpgme_release(mc.ctx);
1102
}
1103
1104
/* Removes the temp directory used by GPGME */
1105
if(tempdir[0] != '\0'){
1106
DIR *d;
1107
struct dirent *direntry;
1108
d = opendir(tempdir);
1109
if(d == NULL){
1110
if(errno != ENOENT){
1111
perror("opendir");
1112
}
1113
} else {
1114
while(true){
1115
direntry = readdir(d);
1116
if(direntry == NULL){
1117
break;
1118
}
1119
if (direntry->d_type == DT_REG){
1120
char *fullname = NULL;
1121
ret = asprintf(&fullname, "%s/%s", tempdir,
1122
direntry->d_name);
1123
if(ret < 0){
1124
perror("asprintf");
1125
continue;
1126
}
1127
ret = unlink(fullname);
1128
if(ret == -1){
1129
fprintf(stderr, "unlink(\"%s\"): %s",
1130
fullname, strerror(errno));
1131
}
1132
free(fullname);
1133
}
1134
}
1135
closedir(d);
1136
}
1137
ret = rmdir(tempdir);
1138
if(ret == -1 and errno != ENOENT){
1139
perror("rmdir");
1140
}
1141
}
1142
1143
return exitcode;
1227
1228
if(debug){
1229
fprintf(stderr, "%s exiting\n", argv[0]);
1230
}
1231
1232
/* Cleanup things */
1233
if(sb != NULL)
1234
avahi_s_service_browser_free(sb);
1235
1236
if(mc.server != NULL)
1237
avahi_server_free(mc.server);
1238
1239
if(mc.simple_poll != NULL)
1240
avahi_simple_poll_free(mc.simple_poll);
1241
1242
if(gnutls_initialized){
1243
gnutls_certificate_free_credentials(mc.cred);
1244
gnutls_global_deinit();
1245
gnutls_dh_params_deinit(mc.dh_params);
1246
}
1247
1248
if(gpgme_initialized){
1249
gpgme_release(mc.ctx);
1250
}
1251
1252
/* Removes the temp directory used by GPGME */
1253
if(tempdir_created){
1254
DIR *d;
1255
struct dirent *direntry;
1256
d = opendir(tempdir);
1257
if(d == NULL){
1258
if(errno != ENOENT){
1259
perror("opendir");
1260
}
1261
} else {
1262
while(true){
1263
direntry = readdir(d);
1264
if(direntry == NULL){
1265
break;
1266
}
1267
/* Skip "." and ".." */
1268
if(direntry->d_name[0] == '.'
1269
and (direntry->d_name[1] == '\0'
1270
or (direntry->d_name[1] == '.'
1271
and direntry->d_name[2] == '\0'))){
1272
continue;
1273
}
1274
char *fullname = NULL;
1275
ret = asprintf(&fullname, "%s/%s", tempdir,
1276
direntry->d_name);
1277
if(ret < 0){
1278
perror("asprintf");
1279
continue;
1280
}
1281
ret = remove(fullname);
1282
if(ret == -1){
1283
fprintf(stderr, "remove(\"%s\"): %s\n", fullname,
1284
strerror(errno));
1285
}
1286
free(fullname);
1287
}
1288
closedir(d);
1289
}
1290
ret = rmdir(tempdir);
1291
if(ret == -1 and errno != ENOENT){
1292
perror("rmdir");
1293
}
1294
}
1295
1296
return exitcode;
1144
1297
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0