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- Committer: Teddy Hogeborn
- Date: 2009-02-13 05:38:21 UTC
- Revision ID: teddy@fukt.bsnet.se-20090213053821-03e696gckk4nbjps
Support not using IPv6 in server:
* mandos (AvahiService.__init__): Take new "protocol" parameter. All
callers changed.
(IPv6_TCPServer.__init__): Take new "use_ipv6" parameter. All
callers changed.
(IPv6_TCPServer.server_bind): Create IPv4 socket if not using IPv6.
(main): New "--no-ipv6" command line option. New "use_ipv6" config
option.
* mandos-options.xml ([@id="address"]): Document conditional IPv4
address support.
([@id="ipv6"]): New paragraph.
* mandos.conf (use_ipv6): New config option.
* mandos.conf.xml (OPTIONS): Document new "use_dbus" option.
(EXAMPLE): Changed to use IPv6 link-local address. Added "use_ipv6"
option.
* mandos.xml (SYNOPSIS): New "--no-ipv6" option.
(OPTIONS): Document new "--no-ipv6" option.
* mandos (AvahiService.__init__): Take new "protocol" parameter. All
callers changed.
(IPv6_TCPServer.__init__): Take new "use_ipv6" parameter. All
callers changed.
(IPv6_TCPServer.server_bind): Create IPv4 socket if not using IPv6.
(main): New "--no-ipv6" command line option. New "use_ipv6" config
option.
* mandos-options.xml ([@id="address"]): Document conditional IPv4
address support.
([@id="ipv6"]): New paragraph.
* mandos.conf (use_ipv6): New config option.
* mandos.conf.xml (OPTIONS): Document new "use_dbus" option.
(EXAMPLE): Changed to use IPv6 link-local address. Added "use_ipv6"
option.
* mandos.xml (SYNOPSIS): New "--no-ipv6" option.
(OPTIONS): Document new "--no-ipv6" option.
- 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(), remove() */
40
40
#include <stdint.h> /* uint16_t, uint32_t */
41
41
#include <stddef.h> /* NULL, size_t, ssize_t */
42
42
#include <stdlib.h> /* free(), EXIT_SUCCESS, EXIT_FAILURE,
43
srand() */
44
#include <stdbool.h> /* bool, true */
43
srand(), strtof() */
44
#include <stdbool.h> /* bool, false, true */
45
45
#include <string.h> /* memset(), strcmp(), strlen(),
46
46
strerror(), asprintf(), strcpy() */
47
#include <sys/ioctl.h> /* ioctl */
47
#include <sys/ioctl.h> /* ioctl */
48
48
#include <sys/types.h> /* socket(), inet_pton(), sockaddr,
49
49
sockaddr_in6, PF_INET6,
50
SOCK_STREAM, INET6_ADDRSTRLEN,
51
uid_t, gid_t, open(), opendir(), DIR */
50
SOCK_STREAM, uid_t, gid_t, open(),
51
opendir(), DIR */
52
52
#include <sys/stat.h> /* open() */
53
53
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
54
struct in6_addr, inet_pton(),
55
connect() */
54
inet_pton(), connect() */
56
55
#include <fcntl.h> /* open() */
57
#include <dirent.h> /* opendir(), struct dirent, readdir() */
58
#include <inttypes.h> /* PRIu16, SCNu16 */
56
#include <dirent.h> /* opendir(), struct dirent, readdir()
57
*/
58
#include <inttypes.h> /* PRIu16, PRIdMAX, intmax_t,
59
strtoimax() */
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
#include <signal.h> /* sigemptyset(), sigaddset(),
79
sigaction(), SIGTERM, sigaction,
80
sig_atomic_t */
81
82
#ifdef __linux__
83
#include <sys/klog.h> /* klogctl() */
84
#endif /* __linux__ */
75
85
76
86
/* Avahi */
77
87
/* All Avahi types, constants and functions
90
100
gnutls_*
91
101
init_gnutls_session(),
92
102
GNUTLS_* */
93
#include <gnutls/openpgp.h> /* gnutls_certificate_set_openpgp_key_file(),
103
#include <gnutls/openpgp.h>
104
/* gnutls_certificate_set_openpgp_key_file(),
94
105
GNUTLS_OPENPGP_FMT_BASE64 */
95
106
96
107
/* GPGME */
122
133
gpgme_ctx_t ctx;
123
134
} mandos_context;
124
135
136
/* global context so signal handler can reach it*/
137
mandos_context mc = { .simple_poll = NULL, .server = NULL,
138
.dh_bits = 1024, .priority = "SECURE256"
139
":!CTYPE-X.509:+CTYPE-OPENPGP" };
140
125
141
/*
126
* Make room in "buffer" for at least BUFFER_SIZE additional bytes.
127
* "buffer_capacity" is how much is currently allocated,
142
* Make additional room in "buffer" for at least BUFFER_SIZE more
143
* bytes. "buffer_capacity" is how much is currently allocated,
128
144
* "buffer_length" is how much is already used.
129
145
*/
130
size_t adjustbuffer(char **buffer, size_t buffer_length,
146
size_t incbuffer(char **buffer, size_t buffer_length,
131
147
size_t buffer_capacity){
132
if (buffer_length + BUFFER_SIZE > buffer_capacity){
148
if(buffer_length + BUFFER_SIZE > buffer_capacity){
133
149
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
134
if (buffer == NULL){
150
if(buffer == NULL){
135
151
return 0;
136
152
}
137
153
buffer_capacity += BUFFER_SIZE;
142
158
/*
143
159
* Initialize GPGME.
144
160
*/
145
static bool init_gpgme(mandos_context *mc, const char *seckey,
161
static bool init_gpgme(const char *seckey,
146
162
const char *pubkey, const char *tempdir){
147
163
int ret;
148
164
gpgme_error_t rc;
150
166
151
167
152
168
/*
153
* Helper function to insert pub and seckey to the enigne keyring.
169
* Helper function to insert pub and seckey to the engine keyring.
154
170
*/
155
171
bool import_key(const char *filename){
156
172
int fd;
163
179
}
164
180
165
181
rc = gpgme_data_new_from_fd(&pgp_data, fd);
166
if (rc != GPG_ERR_NO_ERROR){
182
if(rc != GPG_ERR_NO_ERROR){
167
183
fprintf(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
168
184
gpgme_strsource(rc), gpgme_strerror(rc));
169
185
return false;
170
186
}
171
187
172
rc = gpgme_op_import(mc->ctx, pgp_data);
173
if (rc != GPG_ERR_NO_ERROR){
188
rc = gpgme_op_import(mc.ctx, pgp_data);
189
if(rc != GPG_ERR_NO_ERROR){
174
190
fprintf(stderr, "bad gpgme_op_import: %s: %s\n",
175
191
gpgme_strsource(rc), gpgme_strerror(rc));
176
192
return false;
184
200
return true;
185
201
}
186
202
187
if (debug){
188
fprintf(stderr, "Initialize gpgme\n");
203
if(debug){
204
fprintf(stderr, "Initializing GPGME\n");
189
205
}
190
206
191
207
/* Init GPGME */
192
208
gpgme_check_version(NULL);
193
209
rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
194
if (rc != GPG_ERR_NO_ERROR){
210
if(rc != GPG_ERR_NO_ERROR){
195
211
fprintf(stderr, "bad gpgme_engine_check_version: %s: %s\n",
196
212
gpgme_strsource(rc), gpgme_strerror(rc));
197
213
return false;
198
214
}
199
215
200
216
/* Set GPGME home directory for the OpenPGP engine only */
201
rc = gpgme_get_engine_info (&engine_info);
202
if (rc != GPG_ERR_NO_ERROR){
217
rc = gpgme_get_engine_info(&engine_info);
218
if(rc != GPG_ERR_NO_ERROR){
203
219
fprintf(stderr, "bad gpgme_get_engine_info: %s: %s\n",
204
220
gpgme_strsource(rc), gpgme_strerror(rc));
205
221
return false;
218
234
}
219
235
220
236
/* Create new GPGME "context" */
221
rc = gpgme_new(&(mc->ctx));
222
if (rc != GPG_ERR_NO_ERROR){
237
rc = gpgme_new(&(mc.ctx));
238
if(rc != GPG_ERR_NO_ERROR){
223
239
fprintf(stderr, "bad gpgme_new: %s: %s\n",
224
240
gpgme_strsource(rc), gpgme_strerror(rc));
225
241
return false;
226
242
}
227
243
228
if (not import_key(pubkey) or not import_key(seckey)){
244
if(not import_key(pubkey) or not import_key(seckey)){
229
245
return false;
230
246
}
231
247
236
252
* Decrypt OpenPGP data.
237
253
* Returns -1 on error
238
254
*/
239
static ssize_t pgp_packet_decrypt (const mandos_context *mc,
240
const char *cryptotext,
241
size_t crypto_size,
242
char **plaintext){
255
static ssize_t pgp_packet_decrypt(const char *cryptotext,
256
size_t crypto_size,
257
char **plaintext){
243
258
gpgme_data_t dh_crypto, dh_plain;
244
259
gpgme_error_t rc;
245
260
ssize_t ret;
246
261
size_t plaintext_capacity = 0;
247
262
ssize_t plaintext_length = 0;
248
263
249
if (debug){
264
if(debug){
250
265
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
251
266
}
252
267
253
268
/* Create new GPGME data buffer from memory cryptotext */
254
269
rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,
255
270
0);
256
if (rc != GPG_ERR_NO_ERROR){
271
if(rc != GPG_ERR_NO_ERROR){
257
272
fprintf(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
258
273
gpgme_strsource(rc), gpgme_strerror(rc));
259
274
return -1;
261
276
262
277
/* Create new empty GPGME data buffer for the plaintext */
263
278
rc = gpgme_data_new(&dh_plain);
264
if (rc != GPG_ERR_NO_ERROR){
279
if(rc != GPG_ERR_NO_ERROR){
265
280
fprintf(stderr, "bad gpgme_data_new: %s: %s\n",
266
281
gpgme_strsource(rc), gpgme_strerror(rc));
267
282
gpgme_data_release(dh_crypto);
270
285
271
286
/* Decrypt data from the cryptotext data buffer to the plaintext
272
287
data buffer */
273
rc = gpgme_op_decrypt(mc->ctx, dh_crypto, dh_plain);
274
if (rc != GPG_ERR_NO_ERROR){
288
rc = gpgme_op_decrypt(mc.ctx, dh_crypto, dh_plain);
289
if(rc != GPG_ERR_NO_ERROR){
275
290
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
276
291
gpgme_strsource(rc), gpgme_strerror(rc));
277
292
plaintext_length = -1;
278
if (debug){
293
if(debug){
279
294
gpgme_decrypt_result_t result;
280
result = gpgme_op_decrypt_result(mc->ctx);
281
if (result == NULL){
295
result = gpgme_op_decrypt_result(mc.ctx);
296
if(result == NULL){
282
297
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
283
298
} else {
284
299
fprintf(stderr, "Unsupported algorithm: %s\n",
311
326
}
312
327
313
328
/* Seek back to the beginning of the GPGME plaintext data buffer */
314
if (gpgme_data_seek(dh_plain, (off_t) 0, SEEK_SET) == -1){
329
if(gpgme_data_seek(dh_plain, (off_t)0, SEEK_SET) == -1){
315
330
perror("gpgme_data_seek");
316
331
plaintext_length = -1;
317
332
goto decrypt_end;
319
334
320
335
*plaintext = NULL;
321
336
while(true){
322
plaintext_capacity = adjustbuffer(plaintext,
337
plaintext_capacity = incbuffer(plaintext,
323
338
(size_t)plaintext_length,
324
339
plaintext_capacity);
325
if (plaintext_capacity == 0){
326
perror("adjustbuffer");
340
if(plaintext_capacity == 0){
341
perror("incbuffer");
327
342
plaintext_length = -1;
328
343
goto decrypt_end;
329
344
}
331
346
ret = gpgme_data_read(dh_plain, *plaintext + plaintext_length,
332
347
BUFFER_SIZE);
333
348
/* Print the data, if any */
334
if (ret == 0){
349
if(ret == 0){
335
350
/* EOF */
336
351
break;
337
352
}
361
376
return plaintext_length;
362
377
}
363
378
364
static const char * safer_gnutls_strerror (int value) {
365
const char *ret = gnutls_strerror (value); /* Spurious warning */
366
if (ret == NULL)
379
static const char * safer_gnutls_strerror(int value){
380
const char *ret = gnutls_strerror(value); /* Spurious warning from
381
-Wunreachable-code */
382
if(ret == NULL)
367
383
ret = "(unknown)";
368
384
return ret;
369
385
}
374
390
fprintf(stderr, "GnuTLS: %s", string);
375
391
}
376
392
377
static int init_gnutls_global(mandos_context *mc,
378
const char *pubkeyfilename,
393
static int init_gnutls_global(const char *pubkeyfilename,
379
394
const char *seckeyfilename){
380
395
int ret;
381
396
384
399
}
385
400
386
401
ret = gnutls_global_init();
387
if (ret != GNUTLS_E_SUCCESS) {
388
fprintf (stderr, "GnuTLS global_init: %s\n",
389
safer_gnutls_strerror(ret));
402
if(ret != GNUTLS_E_SUCCESS){
403
fprintf(stderr, "GnuTLS global_init: %s\n",
404
safer_gnutls_strerror(ret));
390
405
return -1;
391
406
}
392
407
393
if (debug){
408
if(debug){
394
409
/* "Use a log level over 10 to enable all debugging options."
395
410
* - GnuTLS manual
396
411
*/
399
414
}
400
415
401
416
/* OpenPGP credentials */
402
gnutls_certificate_allocate_credentials(&mc->cred);
403
if (ret != GNUTLS_E_SUCCESS){
404
fprintf (stderr, "GnuTLS memory error: %s\n", /* Spurious
405
warning */
406
safer_gnutls_strerror(ret));
407
gnutls_global_deinit ();
417
gnutls_certificate_allocate_credentials(&mc.cred);
418
if(ret != GNUTLS_E_SUCCESS){
419
fprintf(stderr, "GnuTLS memory error: %s\n", /* Spurious warning
420
from
421
-Wunreachable-code
422
*/
423
safer_gnutls_strerror(ret));
424
gnutls_global_deinit();
408
425
return -1;
409
426
}
410
427
415
432
}
416
433
417
434
ret = gnutls_certificate_set_openpgp_key_file
418
(mc->cred, pubkeyfilename, seckeyfilename,
435
(mc.cred, pubkeyfilename, seckeyfilename,
419
436
GNUTLS_OPENPGP_FMT_BASE64);
420
if (ret != GNUTLS_E_SUCCESS) {
437
if(ret != GNUTLS_E_SUCCESS){
421
438
fprintf(stderr,
422
439
"Error[%d] while reading the OpenPGP key pair ('%s',"
423
440
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
427
444
}
428
445
429
446
/* GnuTLS server initialization */
430
ret = gnutls_dh_params_init(&mc->dh_params);
431
if (ret != GNUTLS_E_SUCCESS) {
432
fprintf (stderr, "Error in GnuTLS DH parameter initialization:"
433
" %s\n", safer_gnutls_strerror(ret));
447
ret = gnutls_dh_params_init(&mc.dh_params);
448
if(ret != GNUTLS_E_SUCCESS){
449
fprintf(stderr, "Error in GnuTLS DH parameter initialization:"
450
" %s\n", safer_gnutls_strerror(ret));
434
451
goto globalfail;
435
452
}
436
ret = gnutls_dh_params_generate2(mc->dh_params, mc->dh_bits);
437
if (ret != GNUTLS_E_SUCCESS) {
438
fprintf (stderr, "Error in GnuTLS prime generation: %s\n",
439
safer_gnutls_strerror(ret));
453
ret = gnutls_dh_params_generate2(mc.dh_params, mc.dh_bits);
454
if(ret != GNUTLS_E_SUCCESS){
455
fprintf(stderr, "Error in GnuTLS prime generation: %s\n",
456
safer_gnutls_strerror(ret));
440
457
goto globalfail;
441
458
}
442
459
443
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
460
gnutls_certificate_set_dh_params(mc.cred, mc.dh_params);
444
461
445
462
return 0;
446
463
447
464
globalfail:
448
465
449
gnutls_certificate_free_credentials(mc->cred);
466
gnutls_certificate_free_credentials(mc.cred);
450
467
gnutls_global_deinit();
451
gnutls_dh_params_deinit(mc->dh_params);
468
gnutls_dh_params_deinit(mc.dh_params);
452
469
return -1;
453
470
}
454
471
455
static int init_gnutls_session(mandos_context *mc,
456
gnutls_session_t *session){
472
static int init_gnutls_session(gnutls_session_t *session){
457
473
int ret;
458
474
/* GnuTLS session creation */
459
475
ret = gnutls_init(session, GNUTLS_SERVER);
460
if (ret != GNUTLS_E_SUCCESS){
476
if(ret != GNUTLS_E_SUCCESS){
461
477
fprintf(stderr, "Error in GnuTLS session initialization: %s\n",
462
478
safer_gnutls_strerror(ret));
463
479
}
464
480
465
481
{
466
482
const char *err;
467
ret = gnutls_priority_set_direct(*session, mc->priority, &err);
468
if (ret != GNUTLS_E_SUCCESS) {
483
ret = gnutls_priority_set_direct(*session, mc.priority, &err);
484
if(ret != GNUTLS_E_SUCCESS){
469
485
fprintf(stderr, "Syntax error at: %s\n", err);
470
486
fprintf(stderr, "GnuTLS error: %s\n",
471
487
safer_gnutls_strerror(ret));
472
gnutls_deinit (*session);
488
gnutls_deinit(*session);
473
489
return -1;
474
490
}
475
491
}
476
492
477
493
ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,
478
mc->cred);
479
if (ret != GNUTLS_E_SUCCESS) {
494
mc.cred);
495
if(ret != GNUTLS_E_SUCCESS){
480
496
fprintf(stderr, "Error setting GnuTLS credentials: %s\n",
481
497
safer_gnutls_strerror(ret));
482
gnutls_deinit (*session);
498
gnutls_deinit(*session);
483
499
return -1;
484
500
}
485
501
486
502
/* ignore client certificate if any. */
487
gnutls_certificate_server_set_request (*session,
488
GNUTLS_CERT_IGNORE);
503
gnutls_certificate_server_set_request(*session,
504
GNUTLS_CERT_IGNORE);
489
505
490
gnutls_dh_set_prime_bits (*session, mc->dh_bits);
506
gnutls_dh_set_prime_bits(*session, mc.dh_bits);
491
507
492
508
return 0;
493
509
}
499
515
/* Called when a Mandos server is found */
500
516
static int start_mandos_communication(const char *ip, uint16_t port,
501
517
AvahiIfIndex if_index,
502
mandos_context *mc){
518
int af){
503
519
int ret, tcp_sd;
504
520
ssize_t sret;
505
union { struct sockaddr in; struct sockaddr_in6 in6; } to;
521
union {
522
struct sockaddr_in in;
523
struct sockaddr_in6 in6;
524
} to;
506
525
char *buffer = NULL;
507
526
char *decrypted_buffer;
508
527
size_t buffer_length = 0;
510
529
ssize_t decrypted_buffer_size;
511
530
size_t written;
512
531
int retval = 0;
513
char interface[IF_NAMESIZE];
514
532
gnutls_session_t session;
515
516
ret = init_gnutls_session (mc, &session);
517
if (ret != 0){
533
int pf; /* Protocol family */
534
535
switch(af){
536
case AF_INET6:
537
pf = PF_INET6;
538
break;
539
case AF_INET:
540
pf = PF_INET;
541
break;
542
default:
543
fprintf(stderr, "Bad address family: %d\n", af);
544
return -1;
545
}
546
547
ret = init_gnutls_session(&session);
548
if(ret != 0){
518
549
return -1;
519
550
}
520
551
521
552
if(debug){
522
fprintf(stderr, "Setting up a tcp connection to %s, port %" PRIu16
553
fprintf(stderr, "Setting up a TCP connection to %s, port %" PRIu16
523
554
"\n", ip, port);
524
555
}
525
556
526
tcp_sd = socket(PF_INET6, SOCK_STREAM, 0);
527
if(tcp_sd < 0) {
557
tcp_sd = socket(pf, SOCK_STREAM, 0);
558
if(tcp_sd < 0){
528
559
perror("socket");
529
560
return -1;
530
561
}
531
562
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
563
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 ){
564
if(af == AF_INET6){
565
to.in6.sin6_family = (uint16_t)af;
566
ret = inet_pton(af, ip, &to.in6.sin6_addr);
567
} else { /* IPv4 */
568
to.in.sin_family = (sa_family_t)af;
569
ret = inet_pton(af, ip, &to.in.sin_addr);
570
}
571
if(ret < 0 ){
546
572
perror("inet_pton");
547
573
return -1;
548
574
}
550
576
fprintf(stderr, "Bad address: %s\n", ip);
551
577
return -1;
552
578
}
553
to.in6.sin6_port = htons(port); /* Spurious warning */
554
555
to.in6.sin6_scope_id = (uint32_t)if_index;
579
if(af == AF_INET6){
580
to.in6.sin6_port = htons(port); /* Spurious warnings from
581
-Wconversion and
582
-Wunreachable-code */
583
584
if(IN6_IS_ADDR_LINKLOCAL /* Spurious warnings from */
585
(&to.in6.sin6_addr)){ /* -Wstrict-aliasing=2 or lower and
586
-Wunreachable-code*/
587
if(if_index == AVAHI_IF_UNSPEC){
588
fprintf(stderr, "An IPv6 link-local address is incomplete"
589
" without a network interface\n");
590
return -1;
591
}
592
/* Set the network interface number as scope */
593
to.in6.sin6_scope_id = (uint32_t)if_index;
594
}
595
} else {
596
to.in.sin_port = htons(port); /* Spurious warnings from
597
-Wconversion and
598
-Wunreachable-code */
599
}
556
600
557
601
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){
602
if(af == AF_INET6 and if_index != AVAHI_IF_UNSPEC){
603
char interface[IF_NAMESIZE];
604
if(if_indextoname((unsigned int)if_index, interface) == NULL){
605
perror("if_indextoname");
606
} else {
607
fprintf(stderr, "Connection to: %s%%%s, port %" PRIu16 "\n",
608
ip, interface, port);
609
}
610
} else {
611
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
612
port);
613
}
614
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
615
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
616
const char *pcret;
617
if(af == AF_INET6){
618
pcret = inet_ntop(af, &(to.in6.sin6_addr), addrstr,
619
sizeof(addrstr));
620
} else {
621
pcret = inet_ntop(af, &(to.in.sin_addr), addrstr,
622
sizeof(addrstr));
623
}
624
if(pcret == NULL){
563
625
perror("inet_ntop");
564
626
} else {
565
627
if(strcmp(addrstr, ip) != 0){
568
630
}
569
631
}
570
632
571
ret = connect(tcp_sd, &to.in, sizeof(to));
572
if (ret < 0){
633
if(af == AF_INET6){
634
ret = connect(tcp_sd, &to.in6, sizeof(to));
635
} else {
636
ret = connect(tcp_sd, &to.in, sizeof(to)); /* IPv4 */
637
}
638
if(ret < 0){
573
639
perror("connect");
574
640
return -1;
575
641
}
576
642
577
643
const char *out = mandos_protocol_version;
578
644
written = 0;
579
while (true){
645
while(true){
580
646
size_t out_size = strlen(out);
581
647
ret = (int)TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
582
648
out_size - written));
583
if (ret == -1){
649
if(ret == -1){
584
650
perror("write");
585
651
retval = -1;
586
652
goto mandos_end;
589
655
if(written < out_size){
590
656
continue;
591
657
} else {
592
if (out == mandos_protocol_version){
658
if(out == mandos_protocol_version){
593
659
written = 0;
594
660
out = "\r\n";
595
661
} else {
602
668
fprintf(stderr, "Establishing TLS session with %s\n", ip);
603
669
}
604
670
605
gnutls_transport_set_ptr (session, (gnutls_transport_ptr_t) tcp_sd);
671
gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t) tcp_sd);
606
672
607
673
do{
608
ret = gnutls_handshake (session);
674
ret = gnutls_handshake(session);
609
675
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
610
676
611
if (ret != GNUTLS_E_SUCCESS){
677
if(ret != GNUTLS_E_SUCCESS){
612
678
if(debug){
613
679
fprintf(stderr, "*** GnuTLS Handshake failed ***\n");
614
gnutls_perror (ret);
680
gnutls_perror(ret);
615
681
}
616
682
retval = -1;
617
683
goto mandos_end;
620
686
/* Read OpenPGP packet that contains the wanted password */
621
687
622
688
if(debug){
623
fprintf(stderr, "Retrieving pgp encrypted password from %s\n",
689
fprintf(stderr, "Retrieving OpenPGP encrypted password from %s\n",
624
690
ip);
625
691
}
626
692
627
693
while(true){
628
buffer_capacity = adjustbuffer(&buffer, buffer_length,
694
buffer_capacity = incbuffer(&buffer, buffer_length,
629
695
buffer_capacity);
630
if (buffer_capacity == 0){
631
perror("adjustbuffer");
696
if(buffer_capacity == 0){
697
perror("incbuffer");
632
698
retval = -1;
633
699
goto mandos_end;
634
700
}
635
701
636
702
sret = gnutls_record_recv(session, buffer+buffer_length,
637
703
BUFFER_SIZE);
638
if (sret == 0){
704
if(sret == 0){
639
705
break;
640
706
}
641
if (sret < 0){
707
if(sret < 0){
642
708
switch(sret){
643
709
case GNUTLS_E_INTERRUPTED:
644
710
case GNUTLS_E_AGAIN:
645
711
break;
646
712
case GNUTLS_E_REHANDSHAKE:
647
713
do{
648
ret = gnutls_handshake (session);
714
ret = gnutls_handshake(session);
649
715
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
650
if (ret < 0){
716
if(ret < 0){
651
717
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
652
gnutls_perror (ret);
718
gnutls_perror(ret);
653
719
retval = -1;
654
720
goto mandos_end;
655
721
}
658
724
fprintf(stderr, "Unknown error while reading data from"
659
725
" encrypted session with Mandos server\n");
660
726
retval = -1;
661
gnutls_bye (session, GNUTLS_SHUT_RDWR);
727
gnutls_bye(session, GNUTLS_SHUT_RDWR);
662
728
goto mandos_end;
663
729
}
664
730
} else {
670
736
fprintf(stderr, "Closing TLS session\n");
671
737
}
672
738
673
gnutls_bye (session, GNUTLS_SHUT_RDWR);
739
gnutls_bye(session, GNUTLS_SHUT_RDWR);
674
740
675
if (buffer_length > 0){
676
decrypted_buffer_size = pgp_packet_decrypt(mc, buffer,
741
if(buffer_length > 0){
742
decrypted_buffer_size = pgp_packet_decrypt(buffer,
677
743
buffer_length,
678
744
&decrypted_buffer);
679
if (decrypted_buffer_size >= 0){
745
if(decrypted_buffer_size >= 0){
680
746
written = 0;
681
747
while(written < (size_t) decrypted_buffer_size){
682
ret = (int)fwrite (decrypted_buffer + written, 1,
683
(size_t)decrypted_buffer_size - written,
684
stdout);
748
ret = (int)fwrite(decrypted_buffer + written, 1,
749
(size_t)decrypted_buffer_size - written,
750
stdout);
685
751
if(ret == 0 and ferror(stdout)){
686
752
if(debug){
687
753
fprintf(stderr, "Error writing encrypted data: %s\n",
708
774
if(ret == -1){
709
775
perror("close");
710
776
}
711
gnutls_deinit (session);
777
gnutls_deinit(session);
712
778
return retval;
713
779
}
714
780
715
781
static void resolve_callback(AvahiSServiceResolver *r,
716
782
AvahiIfIndex interface,
717
AVAHI_GCC_UNUSED AvahiProtocol protocol,
783
AvahiProtocol proto,
718
784
AvahiResolverEvent event,
719
785
const char *name,
720
786
const char *type,
725
791
AVAHI_GCC_UNUSED AvahiStringList *txt,
726
792
AVAHI_GCC_UNUSED AvahiLookupResultFlags
727
793
flags,
728
void* userdata) {
729
mandos_context *mc = userdata;
794
AVAHI_GCC_UNUSED void* userdata){
730
795
assert(r);
731
796
732
797
/* Called whenever a service has been resolved successfully or
733
798
timed out */
734
799
735
switch (event) {
800
switch(event){
736
801
default:
737
802
case AVAHI_RESOLVER_FAILURE:
738
803
fprintf(stderr, "(Avahi Resolver) Failed to resolve service '%s'"
739
804
" of type '%s' in domain '%s': %s\n", name, type, domain,
740
avahi_strerror(avahi_server_errno(mc->server)));
805
avahi_strerror(avahi_server_errno(mc.server)));
741
806
break;
742
807
743
808
case AVAHI_RESOLVER_FOUND:
746
811
avahi_address_snprint(ip, sizeof(ip), address);
747
812
if(debug){
748
813
fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %"
749
PRIu16 ") on port %d\n", name, host_name, ip,
750
interface, port);
814
PRIdMAX ") on port %" PRIu16 "\n", name, host_name,
815
ip, (intmax_t)interface, port);
751
816
}
752
int ret = start_mandos_communication(ip, port, interface, mc);
753
if (ret == 0){
754
avahi_simple_poll_quit(mc->simple_poll);
817
int ret = start_mandos_communication(ip, port, interface,
818
avahi_proto_to_af(proto));
819
if(ret == 0){
820
avahi_simple_poll_quit(mc.simple_poll);
755
821
}
756
822
}
757
823
}
758
824
avahi_s_service_resolver_free(r);
759
825
}
760
826
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) {
771
mandos_context *mc = userdata;
827
static void browse_callback(AvahiSServiceBrowser *b,
828
AvahiIfIndex interface,
829
AvahiProtocol protocol,
830
AvahiBrowserEvent event,
831
const char *name,
832
const char *type,
833
const char *domain,
834
AVAHI_GCC_UNUSED AvahiLookupResultFlags
835
flags,
836
AVAHI_GCC_UNUSED void* userdata){
772
837
assert(b);
773
838
774
839
/* Called whenever a new services becomes available on the LAN or
775
840
is removed from the LAN */
776
841
777
switch (event) {
842
switch(event){
778
843
default:
779
844
case AVAHI_BROWSER_FAILURE:
780
845
781
846
fprintf(stderr, "(Avahi browser) %s\n",
782
avahi_strerror(avahi_server_errno(mc->server)));
783
avahi_simple_poll_quit(mc->simple_poll);
847
avahi_strerror(avahi_server_errno(mc.server)));
848
avahi_simple_poll_quit(mc.simple_poll);
784
849
return;
785
850
786
851
case AVAHI_BROWSER_NEW:
789
854
the callback function is called the Avahi server will free the
790
855
resolver for us. */
791
856
792
if (!(avahi_s_service_resolver_new(mc->server, interface,
793
protocol, name, type, domain,
794
AVAHI_PROTO_INET6, 0,
795
resolve_callback, mc)))
857
if(avahi_s_service_resolver_new(mc.server, interface, protocol,
858
name, type, domain, protocol, 0,
859
resolve_callback, NULL) == NULL)
796
860
fprintf(stderr, "Avahi: Failed to resolve service '%s': %s\n",
797
name, avahi_strerror(avahi_server_errno(mc->server)));
861
name, avahi_strerror(avahi_server_errno(mc.server)));
798
862
break;
799
863
800
864
case AVAHI_BROWSER_REMOVE:
809
873
}
810
874
}
811
875
876
sig_atomic_t quit_now = 0;
877
878
/* stop main loop after sigterm has been called */
879
static void handle_sigterm(__attribute__((unused)) int sig){
880
if(quit_now){
881
return;
882
}
883
quit_now = 1;
884
int old_errno = errno;
885
if(mc.simple_poll != NULL){
886
avahi_simple_poll_quit(mc.simple_poll);
887
}
888
errno = old_errno;
889
}
890
812
891
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 == 0 or mc.dh_bits == 0){
888
fprintf(stderr, "Bad number of DH bits\n");
889
exit(EXIT_FAILURE);
892
AvahiSServiceBrowser *sb = NULL;
893
int error;
894
int ret;
895
intmax_t tmpmax;
896
char *tmp;
897
int exitcode = EXIT_SUCCESS;
898
const char *interface = "eth0";
899
struct ifreq network;
900
int sd;
901
uid_t uid;
902
gid_t gid;
903
char *connect_to = NULL;
904
char tempdir[] = "/tmp/mandosXXXXXX";
905
bool tempdir_created = false;
906
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
907
const char *seckey = PATHDIR "/" SECKEY;
908
const char *pubkey = PATHDIR "/" PUBKEY;
909
910
bool gnutls_initialized = false;
911
bool gpgme_initialized = false;
912
float delay = 2.5f;
913
914
struct sigaction old_sigterm_action;
915
struct sigaction sigterm_action = { .sa_handler = handle_sigterm };
916
917
{
918
struct argp_option options[] = {
919
{ .name = "debug", .key = 128,
920
.doc = "Debug mode", .group = 3 },
921
{ .name = "connect", .key = 'c',
922
.arg = "ADDRESS:PORT",
923
.doc = "Connect directly to a specific Mandos server",
924
.group = 1 },
925
{ .name = "interface", .key = 'i',
926
.arg = "NAME",
927
.doc = "Network interface that will be used to search for"
928
" Mandos servers",
929
.group = 1 },
930
{ .name = "seckey", .key = 's',
931
.arg = "FILE",
932
.doc = "OpenPGP secret key file base name",
933
.group = 1 },
934
{ .name = "pubkey", .key = 'p',
935
.arg = "FILE",
936
.doc = "OpenPGP public key file base name",
937
.group = 2 },
938
{ .name = "dh-bits", .key = 129,
939
.arg = "BITS",
940
.doc = "Bit length of the prime number used in the"
941
" Diffie-Hellman key exchange",
942
.group = 2 },
943
{ .name = "priority", .key = 130,
944
.arg = "STRING",
945
.doc = "GnuTLS priority string for the TLS handshake",
946
.group = 1 },
947
{ .name = "delay", .key = 131,
948
.arg = "SECONDS",
949
.doc = "Maximum delay to wait for interface startup",
950
.group = 2 },
951
{ .name = NULL }
952
};
953
954
error_t parse_opt(int key, char *arg,
955
struct argp_state *state){
956
switch(key){
957
case 128: /* --debug */
958
debug = true;
959
break;
960
case 'c': /* --connect */
961
connect_to = arg;
962
break;
963
case 'i': /* --interface */
964
interface = arg;
965
break;
966
case 's': /* --seckey */
967
seckey = arg;
968
break;
969
case 'p': /* --pubkey */
970
pubkey = arg;
971
break;
972
case 129: /* --dh-bits */
973
errno = 0;
974
tmpmax = strtoimax(arg, &tmp, 10);
975
if(errno != 0 or tmp == arg or *tmp != '\0'
976
or tmpmax != (typeof(mc.dh_bits))tmpmax){
977
fprintf(stderr, "Bad number of DH bits\n");
978
exit(EXIT_FAILURE);
979
}
980
mc.dh_bits = (typeof(mc.dh_bits))tmpmax;
981
break;
982
case 130: /* --priority */
983
mc.priority = arg;
984
break;
985
case 131: /* --delay */
986
errno = 0;
987
delay = strtof(arg, &tmp);
988
if(errno != 0 or tmp == arg or *tmp != '\0'){
989
fprintf(stderr, "Bad delay\n");
990
exit(EXIT_FAILURE);
991
}
992
break;
993
case ARGP_KEY_ARG:
994
argp_usage(state);
995
case ARGP_KEY_END:
996
break;
997
default:
998
return ARGP_ERR_UNKNOWN;
999
}
1000
return 0;
1001
}
1002
1003
struct argp argp = { .options = options, .parser = parse_opt,
1004
.args_doc = "",
1005
.doc = "Mandos client -- Get and decrypt"
1006
" passwords from a Mandos server" };
1007
ret = argp_parse(&argp, argc, argv, 0, 0, NULL);
1008
if(ret == ARGP_ERR_UNKNOWN){
1009
fprintf(stderr, "Unknown error while parsing arguments\n");
1010
exitcode = EXIT_FAILURE;
1011
goto end;
1012
}
1013
}
1014
1015
if(not debug){
1016
avahi_set_log_function(empty_log);
1017
}
1018
1019
/* Initialize Avahi early so avahi_simple_poll_quit() can be called
1020
from the signal handler */
1021
/* Initialize the pseudo-RNG for Avahi */
1022
srand((unsigned int) time(NULL));
1023
mc.simple_poll = avahi_simple_poll_new();
1024
if(mc.simple_poll == NULL){
1025
fprintf(stderr, "Avahi: Failed to create simple poll object.\n");
1026
exitcode = EXIT_FAILURE;
1027
goto end;
1028
}
1029
1030
sigemptyset(&sigterm_action.sa_mask);
1031
ret = sigaddset(&sigterm_action.sa_mask, SIGINT);
1032
if(ret == -1){
1033
perror("sigaddset");
1034
exitcode = EXIT_FAILURE;
1035
goto end;
1036
}
1037
ret = sigaddset(&sigterm_action.sa_mask, SIGHUP);
1038
if(ret == -1){
1039
perror("sigaddset");
1040
exitcode = EXIT_FAILURE;
1041
goto end;
1042
}
1043
ret = sigaddset(&sigterm_action.sa_mask, SIGTERM);
1044
if(ret == -1){
1045
perror("sigaddset");
1046
exitcode = EXIT_FAILURE;
1047
goto end;
1048
}
1049
ret = sigaction(SIGTERM, &sigterm_action, &old_sigterm_action);
1050
if(ret == -1){
1051
perror("sigaction");
1052
exitcode = EXIT_FAILURE;
1053
goto end;
1054
}
1055
1056
/* If the interface is down, bring it up */
1057
if(interface[0] != '\0'){
1058
#ifdef __linux__
1059
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1060
messages to mess up the prompt */
1061
ret = klogctl(8, NULL, 5);
1062
bool restore_loglevel = true;
1063
if(ret == -1){
1064
restore_loglevel = false;
1065
perror("klogctl");
1066
}
1067
#endif /* __linux__ */
1068
1069
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1070
if(sd < 0){
1071
perror("socket");
1072
exitcode = EXIT_FAILURE;
1073
#ifdef __linux__
1074
if(restore_loglevel){
1075
ret = klogctl(7, NULL, 0);
1076
if(ret == -1){
1077
perror("klogctl");
1078
}
1079
}
1080
#endif /* __linux__ */
1081
goto end;
1082
}
1083
strcpy(network.ifr_name, interface);
1084
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1085
if(ret == -1){
1086
perror("ioctl SIOCGIFFLAGS");
1087
#ifdef __linux__
1088
if(restore_loglevel){
1089
ret = klogctl(7, NULL, 0);
1090
if(ret == -1){
1091
perror("klogctl");
1092
}
1093
}
1094
#endif /* __linux__ */
1095
exitcode = EXIT_FAILURE;
1096
goto end;
1097
}
1098
if((network.ifr_flags & IFF_UP) == 0){
1099
network.ifr_flags |= IFF_UP;
1100
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1101
if(ret == -1){
1102
perror("ioctl SIOCSIFFLAGS");
1103
exitcode = EXIT_FAILURE;
1104
#ifdef __linux__
1105
if(restore_loglevel){
1106
ret = klogctl(7, NULL, 0);
1107
if(ret == -1){
1108
perror("klogctl");
890
1109
}
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
1110
}
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;
1111
#endif /* __linux__ */
913
1112
goto end;
914
1113
}
915
1114
}
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);
1115
/* sleep checking until interface is running */
1116
for(int i=0; i < delay * 4; i++){
926
1117
ret = ioctl(sd, SIOCGIFFLAGS, &network);
927
1118
if(ret == -1){
928
1119
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));
1120
} else if(network.ifr_flags & IFF_RUNNING){
1121
break;
1122
}
1123
struct timespec sleeptime = { .tv_nsec = 250000000 };
1124
ret = nanosleep(&sleeptime, NULL);
1125
if(ret == -1 and errno != EINTR){
1126
perror("nanosleep");
1127
}
1128
}
1129
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1130
if(ret == -1){
1131
perror("close");
1132
}
1133
#ifdef __linux__
1134
if(restore_loglevel){
1135
/* Restores kernel loglevel to default */
1136
ret = klogctl(7, NULL, 0);
942
1137
if(ret == -1){
943
perror("close");
1138
perror("klogctl");
944
1139
}
945
1140
}
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
1141
#endif /* __linux__ */
1142
}
1143
1144
uid = getuid();
1145
gid = getgid();
1146
1147
errno = 0;
1148
setgid(gid);
1149
if(ret == -1){
1150
perror("setgid");
1151
}
1152
1153
ret = setuid(uid);
1154
if(ret == -1){
1155
perror("setuid");
1156
}
1157
1158
ret = init_gnutls_global(pubkey, seckey);
1159
if(ret == -1){
1160
fprintf(stderr, "init_gnutls_global failed\n");
1161
exitcode = EXIT_FAILURE;
1162
goto end;
1163
} else {
1164
gnutls_initialized = true;
1165
}
1166
1167
if(mkdtemp(tempdir) == NULL){
1168
perror("mkdtemp");
1169
goto end;
1170
}
1171
tempdir_created = true;
1172
1173
if(not init_gpgme(pubkey, seckey, tempdir)){
1174
fprintf(stderr, "init_gpgme failed\n");
1175
exitcode = EXIT_FAILURE;
1176
goto end;
1177
} else {
1178
gpgme_initialized = true;
1179
}
1180
1181
if(interface[0] != '\0'){
983
1182
if_index = (AvahiIfIndex) if_nametoindex(interface);
984
1183
if(if_index == 0){
985
1184
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 == 0 or port == 0){
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
1185
exitcode = EXIT_FAILURE;
1186
goto end;
1187
}
1188
}
1189
1190
if(connect_to != NULL){
1191
/* Connect directly, do not use Zeroconf */
1192
/* (Mainly meant for debugging) */
1193
char *address = strrchr(connect_to, ':');
1194
if(address == NULL){
1195
fprintf(stderr, "No colon in address\n");
1196
exitcode = EXIT_FAILURE;
1197
goto end;
1198
}
1199
uint16_t port;
1200
errno = 0;
1201
tmpmax = strtoimax(address+1, &tmp, 10);
1202
if(errno != 0 or tmp == address+1 or *tmp != '\0'
1203
or tmpmax != (uint16_t)tmpmax){
1204
fprintf(stderr, "Bad port number\n");
1205
exitcode = EXIT_FAILURE;
1206
goto end;
1207
}
1208
port = (uint16_t)tmpmax;
1209
*address = '\0';
1210
address = connect_to;
1211
/* Colon in address indicates IPv6 */
1212
int af;
1213
if(strchr(address, ':') != NULL){
1214
af = AF_INET6;
1215
} else {
1216
af = AF_INET;
1217
}
1218
ret = start_mandos_communication(address, port, if_index, af);
1219
if(ret < 0){
1220
exitcode = EXIT_FAILURE;
1221
} else {
1222
exitcode = EXIT_SUCCESS;
1223
}
1224
goto end;
1225
}
1226
1227
{
1228
AvahiServerConfig config;
1229
/* Do not publish any local Zeroconf records */
1230
avahi_server_config_init(&config);
1231
config.publish_hinfo = 0;
1232
config.publish_addresses = 0;
1233
config.publish_workstation = 0;
1234
config.publish_domain = 0;
1235
1236
/* Allocate a new server */
1237
mc.server = avahi_server_new(avahi_simple_poll_get
1238
(mc.simple_poll), &config, NULL,
1239
NULL, &error);
1240
1241
/* Free the Avahi configuration data */
1242
avahi_server_config_free(&config);
1243
}
1244
1245
/* Check if creating the Avahi server object succeeded */
1246
if(mc.server == NULL){
1247
fprintf(stderr, "Failed to create Avahi server: %s\n",
1248
avahi_strerror(error));
1249
exitcode = EXIT_FAILURE;
1250
goto end;
1251
}
1252
1253
/* Create the Avahi service browser */
1254
sb = avahi_s_service_browser_new(mc.server, if_index,
1255
AVAHI_PROTO_UNSPEC, "_mandos._tcp",
1256
NULL, 0, browse_callback, NULL);
1257
if(sb == NULL){
1258
fprintf(stderr, "Failed to create service browser: %s\n",
1259
avahi_strerror(avahi_server_errno(mc.server)));
1260
exitcode = EXIT_FAILURE;
1261
goto end;
1262
}
1263
1264
/* Run the main loop */
1265
1266
if(debug){
1267
fprintf(stderr, "Starting Avahi loop search\n");
1268
}
1269
1270
avahi_simple_poll_loop(mc.simple_poll);
1271
1078
1272
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;
1273
1274
if(debug){
1275
fprintf(stderr, "%s exiting\n", argv[0]);
1276
}
1277
1278
/* Cleanup things */
1279
if(sb != NULL)
1280
avahi_s_service_browser_free(sb);
1281
1282
if(mc.server != NULL)
1283
avahi_server_free(mc.server);
1284
1285
if(mc.simple_poll != NULL)
1286
avahi_simple_poll_free(mc.simple_poll);
1287
1288
if(gnutls_initialized){
1289
gnutls_certificate_free_credentials(mc.cred);
1290
gnutls_global_deinit();
1291
gnutls_dh_params_deinit(mc.dh_params);
1292
}
1293
1294
if(gpgme_initialized){
1295
gpgme_release(mc.ctx);
1296
}
1297
1298
/* Removes the temp directory used by GPGME */
1299
if(tempdir_created){
1300
DIR *d;
1301
struct dirent *direntry;
1302
d = opendir(tempdir);
1303
if(d == NULL){
1304
if(errno != ENOENT){
1305
perror("opendir");
1306
}
1307
} else {
1308
while(true){
1309
direntry = readdir(d);
1310
if(direntry == NULL){
1311
break;
1312
}
1313
/* Skip "." and ".." */
1314
if(direntry->d_name[0] == '.'
1315
and (direntry->d_name[1] == '\0'
1316
or (direntry->d_name[1] == '.'
1317
and direntry->d_name[2] == '\0'))){
1318
continue;
1319
}
1320
char *fullname = NULL;
1321
ret = asprintf(&fullname, "%s/%s", tempdir,
1322
direntry->d_name);
1323
if(ret < 0){
1324
perror("asprintf");
1325
continue;
1326
}
1327
ret = remove(fullname);
1328
if(ret == -1){
1329
fprintf(stderr, "remove(\"%s\"): %s\n", fullname,
1330
strerror(errno));
1331
}
1332
free(fullname);
1333
}
1334
closedir(d);
1335
}
1336
ret = rmdir(tempdir);
1337
if(ret == -1 and errno != ENOENT){
1338
perror("rmdir");
1339
}
1340
}
1341
1342
return exitcode;
1144
1343
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0