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- Committer: Teddy Hogeborn
- Date: 2009-01-12 22:02:33 UTC
- Revision ID: teddy@fukt.bsnet.se-20090112220233-lawxo4uvyzb38u1f
* README (The Plugin System): Removed redundant text about options and
files for the plugins, this is now
documented in the manuals for the
plugins.
* plugins.d/mandos-client.c (main): Remove comment which was copied
from another program by mistake.
Use "sscanf" instead of "strtol"
to parse numbers; this uses the
correct type instead of casting.
Don't report errors when removing
temporary directory if directory
is already gone.
files for the plugins, this is now
documented in the manuals for the
plugins.
* plugins.d/mandos-client.c (main): Remove comment which was copied
from another program by mistake.
Use "sscanf" instead of "strtol"
to parse numbers; this uses the
correct type instead of casting.
Don't report errors when removing
temporary directory if directory
is already gone.
- files removed:
- debian/watch
- files renamed:
- mandos-ctl => mandos-list
- 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(), remove() */
39
stdout, ferror(), sscanf */
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(), strtof() */
44
#include <stdbool.h> /* bool, false, true */
43
srand() */
44
#include <stdbool.h> /* bool, 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, uid_t, gid_t, open(),
51
opendir(), DIR */
50
SOCK_STREAM, INET6_ADDRSTRLEN,
51
uid_t, gid_t, open(), opendir(), DIR */
52
52
#include <sys/stat.h> /* open() */
53
53
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
54
inet_pton(), connect() */
54
struct in6_addr, inet_pton(),
55
connect() */
55
56
#include <fcntl.h> /* open() */
56
#include <dirent.h> /* opendir(), struct dirent, readdir()
57
*/
58
#include <inttypes.h> /* PRIu16, PRIdMAX, intmax_t,
59
strtoimax() */
57
#include <dirent.h> /* opendir(), struct dirent, readdir() */
58
#include <inttypes.h> /* PRIu16, SCNu16 */
60
59
#include <assert.h> /* assert() */
61
60
#include <errno.h> /* perror(), errno */
62
#include <time.h> /* nanosleep(), time() */
61
#include <time.h> /* time() */
63
62
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
64
63
SIOCSIFFLAGS, if_indextoname(),
65
64
if_nametoindex(), IF_NAMESIZE */
66
#include <netinet/in.h> /* IN6_IS_ADDR_LINKLOCAL,
67
INET_ADDRSTRLEN, INET6_ADDRSTRLEN
68
*/
65
#include <netinet/in.h>
69
66
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
70
67
getuid(), getgid(), setuid(),
71
68
setgid() */
72
69
#include <arpa/inet.h> /* inet_pton(), htons */
73
#include <iso646.h> /* not, or, and */
70
#include <iso646.h> /* not, and, or */
74
71
#include <argp.h> /* struct argp_option, error_t, struct
75
72
argp_state, struct argp,
76
73
argp_parse(), ARGP_KEY_ARG,
77
74
ARGP_KEY_END, ARGP_ERR_UNKNOWN */
78
#include <signal.h> /* sigemptyset(), sigaddset(),
79
sigaction(), SIGTERM, sigaction,
80
sig_atomic_t */
81
82
#ifdef __linux__
83
#include <sys/klog.h> /* klogctl() */
84
#endif /* __linux__ */
85
75
86
76
/* Avahi */
87
77
/* All Avahi types, constants and functions
100
90
gnutls_*
101
91
init_gnutls_session(),
102
92
GNUTLS_* */
103
#include <gnutls/openpgp.h>
104
/* gnutls_certificate_set_openpgp_key_file(),
93
#include <gnutls/openpgp.h> /* gnutls_certificate_set_openpgp_key_file(),
105
94
GNUTLS_OPENPGP_FMT_BASE64 */
106
95
107
96
/* GPGME */
133
122
gpgme_ctx_t ctx;
134
123
} mandos_context;
135
124
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
141
125
/*
142
* Make additional room in "buffer" for at least BUFFER_SIZE more
143
* bytes. "buffer_capacity" is how much is currently allocated,
126
* Make room in "buffer" for at least BUFFER_SIZE additional bytes.
127
* "buffer_capacity" is how much is currently allocated,
144
128
* "buffer_length" is how much is already used.
145
129
*/
146
size_t incbuffer(char **buffer, size_t buffer_length,
130
size_t adjustbuffer(char **buffer, size_t buffer_length,
147
131
size_t buffer_capacity){
148
if(buffer_length + BUFFER_SIZE > buffer_capacity){
132
if (buffer_length + BUFFER_SIZE > buffer_capacity){
149
133
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
150
if(buffer == NULL){
134
if (buffer == NULL){
151
135
return 0;
152
136
}
153
137
buffer_capacity += BUFFER_SIZE;
158
142
/*
159
143
* Initialize GPGME.
160
144
*/
161
static bool init_gpgme(const char *seckey,
145
static bool init_gpgme(mandos_context *mc, const char *seckey,
162
146
const char *pubkey, const char *tempdir){
163
147
int ret;
164
148
gpgme_error_t rc;
166
150
167
151
168
152
/*
169
* Helper function to insert pub and seckey to the engine keyring.
153
* Helper function to insert pub and seckey to the enigne keyring.
170
154
*/
171
155
bool import_key(const char *filename){
172
156
int fd;
179
163
}
180
164
181
165
rc = gpgme_data_new_from_fd(&pgp_data, fd);
182
if(rc != GPG_ERR_NO_ERROR){
166
if (rc != GPG_ERR_NO_ERROR){
183
167
fprintf(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
184
168
gpgme_strsource(rc), gpgme_strerror(rc));
185
169
return false;
186
170
}
187
171
188
rc = gpgme_op_import(mc.ctx, pgp_data);
189
if(rc != GPG_ERR_NO_ERROR){
172
rc = gpgme_op_import(mc->ctx, pgp_data);
173
if (rc != GPG_ERR_NO_ERROR){
190
174
fprintf(stderr, "bad gpgme_op_import: %s: %s\n",
191
175
gpgme_strsource(rc), gpgme_strerror(rc));
192
176
return false;
200
184
return true;
201
185
}
202
186
203
if(debug){
204
fprintf(stderr, "Initializing GPGME\n");
187
if (debug){
188
fprintf(stderr, "Initialize gpgme\n");
205
189
}
206
190
207
191
/* Init GPGME */
208
192
gpgme_check_version(NULL);
209
193
rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
210
if(rc != GPG_ERR_NO_ERROR){
194
if (rc != GPG_ERR_NO_ERROR){
211
195
fprintf(stderr, "bad gpgme_engine_check_version: %s: %s\n",
212
196
gpgme_strsource(rc), gpgme_strerror(rc));
213
197
return false;
214
198
}
215
199
216
200
/* Set GPGME home directory for the OpenPGP engine only */
217
rc = gpgme_get_engine_info(&engine_info);
218
if(rc != GPG_ERR_NO_ERROR){
201
rc = gpgme_get_engine_info (&engine_info);
202
if (rc != GPG_ERR_NO_ERROR){
219
203
fprintf(stderr, "bad gpgme_get_engine_info: %s: %s\n",
220
204
gpgme_strsource(rc), gpgme_strerror(rc));
221
205
return false;
234
218
}
235
219
236
220
/* Create new GPGME "context" */
237
rc = gpgme_new(&(mc.ctx));
238
if(rc != GPG_ERR_NO_ERROR){
221
rc = gpgme_new(&(mc->ctx));
222
if (rc != GPG_ERR_NO_ERROR){
239
223
fprintf(stderr, "bad gpgme_new: %s: %s\n",
240
224
gpgme_strsource(rc), gpgme_strerror(rc));
241
225
return false;
242
226
}
243
227
244
if(not import_key(pubkey) or not import_key(seckey)){
228
if (not import_key(pubkey) or not import_key(seckey)){
245
229
return false;
246
230
}
247
231
252
236
* Decrypt OpenPGP data.
253
237
* Returns -1 on error
254
238
*/
255
static ssize_t pgp_packet_decrypt(const char *cryptotext,
256
size_t crypto_size,
257
char **plaintext){
239
static ssize_t pgp_packet_decrypt (const mandos_context *mc,
240
const char *cryptotext,
241
size_t crypto_size,
242
char **plaintext){
258
243
gpgme_data_t dh_crypto, dh_plain;
259
244
gpgme_error_t rc;
260
245
ssize_t ret;
261
246
size_t plaintext_capacity = 0;
262
247
ssize_t plaintext_length = 0;
263
248
264
if(debug){
249
if (debug){
265
250
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
266
251
}
267
252
268
253
/* Create new GPGME data buffer from memory cryptotext */
269
254
rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,
270
255
0);
271
if(rc != GPG_ERR_NO_ERROR){
256
if (rc != GPG_ERR_NO_ERROR){
272
257
fprintf(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
273
258
gpgme_strsource(rc), gpgme_strerror(rc));
274
259
return -1;
276
261
277
262
/* Create new empty GPGME data buffer for the plaintext */
278
263
rc = gpgme_data_new(&dh_plain);
279
if(rc != GPG_ERR_NO_ERROR){
264
if (rc != GPG_ERR_NO_ERROR){
280
265
fprintf(stderr, "bad gpgme_data_new: %s: %s\n",
281
266
gpgme_strsource(rc), gpgme_strerror(rc));
282
267
gpgme_data_release(dh_crypto);
285
270
286
271
/* Decrypt data from the cryptotext data buffer to the plaintext
287
272
data buffer */
288
rc = gpgme_op_decrypt(mc.ctx, dh_crypto, dh_plain);
289
if(rc != GPG_ERR_NO_ERROR){
273
rc = gpgme_op_decrypt(mc->ctx, dh_crypto, dh_plain);
274
if (rc != GPG_ERR_NO_ERROR){
290
275
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
291
276
gpgme_strsource(rc), gpgme_strerror(rc));
292
277
plaintext_length = -1;
293
if(debug){
278
if (debug){
294
279
gpgme_decrypt_result_t result;
295
result = gpgme_op_decrypt_result(mc.ctx);
296
if(result == NULL){
280
result = gpgme_op_decrypt_result(mc->ctx);
281
if (result == NULL){
297
282
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
298
283
} else {
299
284
fprintf(stderr, "Unsupported algorithm: %s\n",
326
311
}
327
312
328
313
/* Seek back to the beginning of the GPGME plaintext data buffer */
329
if(gpgme_data_seek(dh_plain, (off_t)0, SEEK_SET) == -1){
314
if (gpgme_data_seek(dh_plain, (off_t) 0, SEEK_SET) == -1){
330
315
perror("gpgme_data_seek");
331
316
plaintext_length = -1;
332
317
goto decrypt_end;
334
319
335
320
*plaintext = NULL;
336
321
while(true){
337
plaintext_capacity = incbuffer(plaintext,
322
plaintext_capacity = adjustbuffer(plaintext,
338
323
(size_t)plaintext_length,
339
324
plaintext_capacity);
340
if(plaintext_capacity == 0){
341
perror("incbuffer");
325
if (plaintext_capacity == 0){
326
perror("adjustbuffer");
342
327
plaintext_length = -1;
343
328
goto decrypt_end;
344
329
}
346
331
ret = gpgme_data_read(dh_plain, *plaintext + plaintext_length,
347
332
BUFFER_SIZE);
348
333
/* Print the data, if any */
349
if(ret == 0){
334
if (ret == 0){
350
335
/* EOF */
351
336
break;
352
337
}
376
361
return plaintext_length;
377
362
}
378
363
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)
364
static const char * safer_gnutls_strerror (int value) {
365
const char *ret = gnutls_strerror (value); /* Spurious warning */
366
if (ret == NULL)
383
367
ret = "(unknown)";
384
368
return ret;
385
369
}
390
374
fprintf(stderr, "GnuTLS: %s", string);
391
375
}
392
376
393
static int init_gnutls_global(const char *pubkeyfilename,
377
static int init_gnutls_global(mandos_context *mc,
378
const char *pubkeyfilename,
394
379
const char *seckeyfilename){
395
380
int ret;
396
381
399
384
}
400
385
401
386
ret = gnutls_global_init();
402
if(ret != GNUTLS_E_SUCCESS){
403
fprintf(stderr, "GnuTLS global_init: %s\n",
404
safer_gnutls_strerror(ret));
387
if (ret != GNUTLS_E_SUCCESS) {
388
fprintf (stderr, "GnuTLS global_init: %s\n",
389
safer_gnutls_strerror(ret));
405
390
return -1;
406
391
}
407
392
408
if(debug){
393
if (debug){
409
394
/* "Use a log level over 10 to enable all debugging options."
410
395
* - GnuTLS manual
411
396
*/
414
399
}
415
400
416
401
/* OpenPGP credentials */
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();
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 ();
425
408
return -1;
426
409
}
427
410
432
415
}
433
416
434
417
ret = gnutls_certificate_set_openpgp_key_file
435
(mc.cred, pubkeyfilename, seckeyfilename,
418
(mc->cred, pubkeyfilename, seckeyfilename,
436
419
GNUTLS_OPENPGP_FMT_BASE64);
437
if(ret != GNUTLS_E_SUCCESS){
420
if (ret != GNUTLS_E_SUCCESS) {
438
421
fprintf(stderr,
439
422
"Error[%d] while reading the OpenPGP key pair ('%s',"
440
423
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
444
427
}
445
428
446
429
/* GnuTLS server initialization */
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));
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));
451
434
goto globalfail;
452
435
}
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));
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));
457
440
goto globalfail;
458
441
}
459
442
460
gnutls_certificate_set_dh_params(mc.cred, mc.dh_params);
443
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
461
444
462
445
return 0;
463
446
464
447
globalfail:
465
448
466
gnutls_certificate_free_credentials(mc.cred);
449
gnutls_certificate_free_credentials(mc->cred);
467
450
gnutls_global_deinit();
468
gnutls_dh_params_deinit(mc.dh_params);
451
gnutls_dh_params_deinit(mc->dh_params);
469
452
return -1;
470
453
}
471
454
472
static int init_gnutls_session(gnutls_session_t *session){
455
static int init_gnutls_session(mandos_context *mc,
456
gnutls_session_t *session){
473
457
int ret;
474
458
/* GnuTLS session creation */
475
459
ret = gnutls_init(session, GNUTLS_SERVER);
476
if(ret != GNUTLS_E_SUCCESS){
460
if (ret != GNUTLS_E_SUCCESS){
477
461
fprintf(stderr, "Error in GnuTLS session initialization: %s\n",
478
462
safer_gnutls_strerror(ret));
479
463
}
480
464
481
465
{
482
466
const char *err;
483
ret = gnutls_priority_set_direct(*session, mc.priority, &err);
484
if(ret != GNUTLS_E_SUCCESS){
467
ret = gnutls_priority_set_direct(*session, mc->priority, &err);
468
if (ret != GNUTLS_E_SUCCESS) {
485
469
fprintf(stderr, "Syntax error at: %s\n", err);
486
470
fprintf(stderr, "GnuTLS error: %s\n",
487
471
safer_gnutls_strerror(ret));
488
gnutls_deinit(*session);
472
gnutls_deinit (*session);
489
473
return -1;
490
474
}
491
475
}
492
476
493
477
ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,
494
mc.cred);
495
if(ret != GNUTLS_E_SUCCESS){
478
mc->cred);
479
if (ret != GNUTLS_E_SUCCESS) {
496
480
fprintf(stderr, "Error setting GnuTLS credentials: %s\n",
497
481
safer_gnutls_strerror(ret));
498
gnutls_deinit(*session);
482
gnutls_deinit (*session);
499
483
return -1;
500
484
}
501
485
502
486
/* ignore client certificate if any. */
503
gnutls_certificate_server_set_request(*session,
504
GNUTLS_CERT_IGNORE);
487
gnutls_certificate_server_set_request (*session,
488
GNUTLS_CERT_IGNORE);
505
489
506
gnutls_dh_set_prime_bits(*session, mc.dh_bits);
490
gnutls_dh_set_prime_bits (*session, mc->dh_bits);
507
491
508
492
return 0;
509
493
}
515
499
/* Called when a Mandos server is found */
516
500
static int start_mandos_communication(const char *ip, uint16_t port,
517
501
AvahiIfIndex if_index,
518
int af){
502
mandos_context *mc){
519
503
int ret, tcp_sd;
520
504
ssize_t sret;
521
union {
522
struct sockaddr_in in;
523
struct sockaddr_in6 in6;
524
} to;
505
union { struct sockaddr in; struct sockaddr_in6 in6; } to;
525
506
char *buffer = NULL;
526
507
char *decrypted_buffer;
527
508
size_t buffer_length = 0;
529
510
ssize_t decrypted_buffer_size;
530
511
size_t written;
531
512
int retval = 0;
513
char interface[IF_NAMESIZE];
532
514
gnutls_session_t session;
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){
515
516
ret = init_gnutls_session (mc, &session);
517
if (ret != 0){
549
518
return -1;
550
519
}
551
520
552
521
if(debug){
553
fprintf(stderr, "Setting up a TCP connection to %s, port %" PRIu16
522
fprintf(stderr, "Setting up a tcp connection to %s, port %" PRIu16
554
523
"\n", ip, port);
555
524
}
556
525
557
tcp_sd = socket(pf, SOCK_STREAM, 0);
558
if(tcp_sd < 0){
526
tcp_sd = socket(PF_INET6, SOCK_STREAM, 0);
527
if(tcp_sd < 0) {
559
528
perror("socket");
560
529
return -1;
561
530
}
562
531
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
563
540
memset(&to, 0, sizeof(to));
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 ){
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 ){
572
546
perror("inet_pton");
573
547
return -1;
574
548
}
576
550
fprintf(stderr, "Bad address: %s\n", ip);
577
551
return -1;
578
552
}
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
}
553
to.in6.sin6_port = htons(port); /* Spurious warning */
554
555
to.in6.sin6_scope_id = (uint32_t)if_index;
600
556
601
557
if(debug){
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){
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){
625
563
perror("inet_ntop");
626
564
} else {
627
565
if(strcmp(addrstr, ip) != 0){
630
568
}
631
569
}
632
570
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){
571
ret = connect(tcp_sd, &to.in, sizeof(to));
572
if (ret < 0){
639
573
perror("connect");
640
574
return -1;
641
575
}
642
576
643
577
const char *out = mandos_protocol_version;
644
578
written = 0;
645
while(true){
579
while (true){
646
580
size_t out_size = strlen(out);
647
581
ret = (int)TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
648
582
out_size - written));
649
if(ret == -1){
583
if (ret == -1){
650
584
perror("write");
651
585
retval = -1;
652
586
goto mandos_end;
655
589
if(written < out_size){
656
590
continue;
657
591
} else {
658
if(out == mandos_protocol_version){
592
if (out == mandos_protocol_version){
659
593
written = 0;
660
594
out = "\r\n";
661
595
} else {
668
602
fprintf(stderr, "Establishing TLS session with %s\n", ip);
669
603
}
670
604
671
gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t) tcp_sd);
605
gnutls_transport_set_ptr (session, (gnutls_transport_ptr_t) tcp_sd);
672
606
673
607
do{
674
ret = gnutls_handshake(session);
608
ret = gnutls_handshake (session);
675
609
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
676
610
677
if(ret != GNUTLS_E_SUCCESS){
611
if (ret != GNUTLS_E_SUCCESS){
678
612
if(debug){
679
613
fprintf(stderr, "*** GnuTLS Handshake failed ***\n");
680
gnutls_perror(ret);
614
gnutls_perror (ret);
681
615
}
682
616
retval = -1;
683
617
goto mandos_end;
686
620
/* Read OpenPGP packet that contains the wanted password */
687
621
688
622
if(debug){
689
fprintf(stderr, "Retrieving OpenPGP encrypted password from %s\n",
623
fprintf(stderr, "Retrieving pgp encrypted password from %s\n",
690
624
ip);
691
625
}
692
626
693
627
while(true){
694
buffer_capacity = incbuffer(&buffer, buffer_length,
628
buffer_capacity = adjustbuffer(&buffer, buffer_length,
695
629
buffer_capacity);
696
if(buffer_capacity == 0){
697
perror("incbuffer");
630
if (buffer_capacity == 0){
631
perror("adjustbuffer");
698
632
retval = -1;
699
633
goto mandos_end;
700
634
}
701
635
702
636
sret = gnutls_record_recv(session, buffer+buffer_length,
703
637
BUFFER_SIZE);
704
if(sret == 0){
638
if (sret == 0){
705
639
break;
706
640
}
707
if(sret < 0){
641
if (sret < 0){
708
642
switch(sret){
709
643
case GNUTLS_E_INTERRUPTED:
710
644
case GNUTLS_E_AGAIN:
711
645
break;
712
646
case GNUTLS_E_REHANDSHAKE:
713
647
do{
714
ret = gnutls_handshake(session);
648
ret = gnutls_handshake (session);
715
649
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
716
if(ret < 0){
650
if (ret < 0){
717
651
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
718
gnutls_perror(ret);
652
gnutls_perror (ret);
719
653
retval = -1;
720
654
goto mandos_end;
721
655
}
724
658
fprintf(stderr, "Unknown error while reading data from"
725
659
" encrypted session with Mandos server\n");
726
660
retval = -1;
727
gnutls_bye(session, GNUTLS_SHUT_RDWR);
661
gnutls_bye (session, GNUTLS_SHUT_RDWR);
728
662
goto mandos_end;
729
663
}
730
664
} else {
736
670
fprintf(stderr, "Closing TLS session\n");
737
671
}
738
672
739
gnutls_bye(session, GNUTLS_SHUT_RDWR);
673
gnutls_bye (session, GNUTLS_SHUT_RDWR);
740
674
741
if(buffer_length > 0){
742
decrypted_buffer_size = pgp_packet_decrypt(buffer,
675
if (buffer_length > 0){
676
decrypted_buffer_size = pgp_packet_decrypt(mc, buffer,
743
677
buffer_length,
744
678
&decrypted_buffer);
745
if(decrypted_buffer_size >= 0){
679
if (decrypted_buffer_size >= 0){
746
680
written = 0;
747
681
while(written < (size_t) decrypted_buffer_size){
748
ret = (int)fwrite(decrypted_buffer + written, 1,
749
(size_t)decrypted_buffer_size - written,
750
stdout);
682
ret = (int)fwrite (decrypted_buffer + written, 1,
683
(size_t)decrypted_buffer_size - written,
684
stdout);
751
685
if(ret == 0 and ferror(stdout)){
752
686
if(debug){
753
687
fprintf(stderr, "Error writing encrypted data: %s\n",
774
708
if(ret == -1){
775
709
perror("close");
776
710
}
777
gnutls_deinit(session);
711
gnutls_deinit (session);
778
712
return retval;
779
713
}
780
714
781
715
static void resolve_callback(AvahiSServiceResolver *r,
782
716
AvahiIfIndex interface,
783
AvahiProtocol proto,
717
AVAHI_GCC_UNUSED AvahiProtocol protocol,
784
718
AvahiResolverEvent event,
785
719
const char *name,
786
720
const char *type,
791
725
AVAHI_GCC_UNUSED AvahiStringList *txt,
792
726
AVAHI_GCC_UNUSED AvahiLookupResultFlags
793
727
flags,
794
AVAHI_GCC_UNUSED void* userdata){
728
void* userdata) {
729
mandos_context *mc = userdata;
795
730
assert(r);
796
731
797
732
/* Called whenever a service has been resolved successfully or
798
733
timed out */
799
734
800
switch(event){
735
switch (event) {
801
736
default:
802
737
case AVAHI_RESOLVER_FAILURE:
803
738
fprintf(stderr, "(Avahi Resolver) Failed to resolve service '%s'"
804
739
" of type '%s' in domain '%s': %s\n", name, type, domain,
805
avahi_strerror(avahi_server_errno(mc.server)));
740
avahi_strerror(avahi_server_errno(mc->server)));
806
741
break;
807
742
808
743
case AVAHI_RESOLVER_FOUND:
811
746
avahi_address_snprint(ip, sizeof(ip), address);
812
747
if(debug){
813
748
fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %"
814
PRIdMAX ") on port %" PRIu16 "\n", name, host_name,
815
ip, (intmax_t)interface, port);
749
PRIu16 ") on port %d\n", name, host_name, ip,
750
interface, port);
816
751
}
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);
752
int ret = start_mandos_communication(ip, port, interface, mc);
753
if (ret == 0){
754
avahi_simple_poll_quit(mc->simple_poll);
821
755
}
822
756
}
823
757
}
824
758
avahi_s_service_resolver_free(r);
825
759
}
826
760
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){
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;
837
772
assert(b);
838
773
839
774
/* Called whenever a new services becomes available on the LAN or
840
775
is removed from the LAN */
841
776
842
switch(event){
777
switch (event) {
843
778
default:
844
779
case AVAHI_BROWSER_FAILURE:
845
780
846
781
fprintf(stderr, "(Avahi browser) %s\n",
847
avahi_strerror(avahi_server_errno(mc.server)));
848
avahi_simple_poll_quit(mc.simple_poll);
782
avahi_strerror(avahi_server_errno(mc->server)));
783
avahi_simple_poll_quit(mc->simple_poll);
849
784
return;
850
785
851
786
case AVAHI_BROWSER_NEW:
854
789
the callback function is called the Avahi server will free the
855
790
resolver for us. */
856
791
857
if(!(avahi_s_service_resolver_new(mc.server, interface,
792
if (!(avahi_s_service_resolver_new(mc->server, interface,
858
793
protocol, name, type, domain,
859
794
AVAHI_PROTO_INET6, 0,
860
resolve_callback, NULL)))
795
resolve_callback, mc)))
861
796
fprintf(stderr, "Avahi: Failed to resolve service '%s': %s\n",
862
name, avahi_strerror(avahi_server_errno(mc.server)));
797
name, avahi_strerror(avahi_server_errno(mc->server)));
863
798
break;
864
799
865
800
case AVAHI_BROWSER_REMOVE:
874
809
}
875
810
}
876
811
877
sig_atomic_t quit_now = 0;
878
879
/* stop main loop after sigterm has been called */
880
static void handle_sigterm(__attribute__((unused)) int sig){
881
if(quit_now){
882
return;
883
}
884
quit_now = 1;
885
int old_errno = errno;
886
if(mc.simple_poll != NULL){
887
avahi_simple_poll_quit(mc.simple_poll);
888
}
889
errno = old_errno;
890
}
891
892
812
int main(int argc, char *argv[]){
893
AvahiSServiceBrowser *sb = NULL;
894
int error;
895
int ret;
896
intmax_t tmpmax;
897
char *tmp;
898
int exitcode = EXIT_SUCCESS;
899
const char *interface = "eth0";
900
struct ifreq network;
901
int sd;
902
uid_t uid;
903
gid_t gid;
904
char *connect_to = NULL;
905
char tempdir[] = "/tmp/mandosXXXXXX";
906
bool tempdir_created = false;
907
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
908
const char *seckey = PATHDIR "/" SECKEY;
909
const char *pubkey = PATHDIR "/" PUBKEY;
910
911
/* Initialize Mandos context */
912
mc = (mandos_context){ .simple_poll = NULL, .server = NULL,
913
.dh_bits = 1024, .priority = "SECURE256"
914
":!CTYPE-X.509:+CTYPE-OPENPGP" };
915
bool gnutls_initialized = false;
916
bool gpgme_initialized = false;
917
float delay = 2.5f;
918
919
struct sigaction old_sigterm_action;
920
struct sigaction sigterm_action = { .sa_handler = handle_sigterm };
921
922
{
923
struct argp_option options[] = {
924
{ .name = "debug", .key = 128,
925
.doc = "Debug mode", .group = 3 },
926
{ .name = "connect", .key = 'c',
927
.arg = "ADDRESS:PORT",
928
.doc = "Connect directly to a specific Mandos server",
929
.group = 1 },
930
{ .name = "interface", .key = 'i',
931
.arg = "NAME",
932
.doc = "Network interface that will be used to search for"
933
" Mandos servers",
934
.group = 1 },
935
{ .name = "seckey", .key = 's',
936
.arg = "FILE",
937
.doc = "OpenPGP secret key file base name",
938
.group = 1 },
939
{ .name = "pubkey", .key = 'p',
940
.arg = "FILE",
941
.doc = "OpenPGP public key file base name",
942
.group = 2 },
943
{ .name = "dh-bits", .key = 129,
944
.arg = "BITS",
945
.doc = "Bit length of the prime number used in the"
946
" Diffie-Hellman key exchange",
947
.group = 2 },
948
{ .name = "priority", .key = 130,
949
.arg = "STRING",
950
.doc = "GnuTLS priority string for the TLS handshake",
951
.group = 1 },
952
{ .name = "delay", .key = 131,
953
.arg = "SECONDS",
954
.doc = "Maximum delay to wait for interface startup",
955
.group = 2 },
956
{ .name = NULL }
957
};
958
959
error_t parse_opt(int key, char *arg,
960
struct argp_state *state){
961
switch(key){
962
case 128: /* --debug */
963
debug = true;
964
break;
965
case 'c': /* --connect */
966
connect_to = arg;
967
break;
968
case 'i': /* --interface */
969
interface = arg;
970
break;
971
case 's': /* --seckey */
972
seckey = arg;
973
break;
974
case 'p': /* --pubkey */
975
pubkey = arg;
976
break;
977
case 129: /* --dh-bits */
978
errno = 0;
979
tmpmax = strtoimax(arg, &tmp, 10);
980
if(errno != 0 or tmp == arg or *tmp != '\0'
981
or tmpmax != (typeof(mc.dh_bits))tmpmax){
982
fprintf(stderr, "Bad number of DH bits\n");
983
exit(EXIT_FAILURE);
984
}
985
mc.dh_bits = (typeof(mc.dh_bits))tmpmax;
986
break;
987
case 130: /* --priority */
988
mc.priority = arg;
989
break;
990
case 131: /* --delay */
991
errno = 0;
992
delay = strtof(arg, &tmp);
993
if(errno != 0 or tmp == arg or *tmp != '\0'){
994
fprintf(stderr, "Bad delay\n");
995
exit(EXIT_FAILURE);
996
}
997
break;
998
case ARGP_KEY_ARG:
999
argp_usage(state);
1000
case ARGP_KEY_END:
1001
break;
1002
default:
1003
return ARGP_ERR_UNKNOWN;
1004
}
1005
return 0;
1006
}
1007
1008
struct argp argp = { .options = options, .parser = parse_opt,
1009
.args_doc = "",
1010
.doc = "Mandos client -- Get and decrypt"
1011
" passwords from a Mandos server" };
1012
ret = argp_parse(&argp, argc, argv, 0, 0, NULL);
1013
if(ret == ARGP_ERR_UNKNOWN){
1014
fprintf(stderr, "Unknown error while parsing arguments\n");
1015
exitcode = EXIT_FAILURE;
1016
goto end;
1017
}
1018
}
1019
1020
if(not debug){
1021
avahi_set_log_function(empty_log);
1022
}
1023
1024
/* Initialize Avahi early so avahi_simple_poll_quit() can be called
1025
from the signal handler */
1026
/* Initialize the pseudo-RNG for Avahi */
1027
srand((unsigned int) time(NULL));
1028
mc.simple_poll = avahi_simple_poll_new();
1029
if(mc.simple_poll == NULL){
1030
fprintf(stderr, "Avahi: Failed to create simple poll object.\n");
1031
exitcode = EXIT_FAILURE;
1032
goto end;
1033
}
1034
1035
sigemptyset(&sigterm_action.sa_mask);
1036
ret = sigaddset(&sigterm_action.sa_mask, SIGINT);
1037
if(ret == -1){
1038
perror("sigaddset");
1039
exitcode = EXIT_FAILURE;
1040
goto end;
1041
}
1042
ret = sigaddset(&sigterm_action.sa_mask, SIGHUP);
1043
if(ret == -1){
1044
perror("sigaddset");
1045
exitcode = EXIT_FAILURE;
1046
goto end;
1047
}
1048
ret = sigaddset(&sigterm_action.sa_mask, SIGTERM);
1049
if(ret == -1){
1050
perror("sigaddset");
1051
exitcode = EXIT_FAILURE;
1052
goto end;
1053
}
1054
ret = sigaction(SIGTERM, &sigterm_action, &old_sigterm_action);
1055
if(ret == -1){
1056
perror("sigaction");
1057
exitcode = EXIT_FAILURE;
1058
goto end;
1059
}
1060
1061
/* If the interface is down, bring it up */
1062
if(interface[0] != '\0'){
1063
#ifdef __linux__
1064
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1065
messages to mess up the prompt */
1066
ret = klogctl(8, NULL, 5);
1067
bool restore_loglevel = true;
1068
if(ret == -1){
1069
restore_loglevel = false;
1070
perror("klogctl");
1071
}
1072
#endif /* __linux__ */
1073
1074
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1075
if(sd < 0){
1076
perror("socket");
1077
exitcode = EXIT_FAILURE;
1078
#ifdef __linux__
1079
if(restore_loglevel){
1080
ret = klogctl(7, NULL, 0);
1081
if(ret == -1){
1082
perror("klogctl");
1083
}
1084
}
1085
#endif /* __linux__ */
1086
goto end;
1087
}
1088
strcpy(network.ifr_name, interface);
1089
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1090
if(ret == -1){
1091
perror("ioctl SIOCGIFFLAGS");
1092
#ifdef __linux__
1093
if(restore_loglevel){
1094
ret = klogctl(7, NULL, 0);
1095
if(ret == -1){
1096
perror("klogctl");
1097
}
1098
}
1099
#endif /* __linux__ */
1100
exitcode = EXIT_FAILURE;
1101
goto end;
1102
}
1103
if((network.ifr_flags & IFF_UP) == 0){
1104
network.ifr_flags |= IFF_UP;
1105
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1106
if(ret == -1){
1107
perror("ioctl SIOCSIFFLAGS");
1108
exitcode = EXIT_FAILURE;
1109
#ifdef __linux__
1110
if(restore_loglevel){
1111
ret = klogctl(7, NULL, 0);
1112
if(ret == -1){
1113
perror("klogctl");
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);
1114
890
}
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;
1115
901
}
1116
#endif /* __linux__ */
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;
1117
913
goto end;
1118
914
}
1119
915
}
1120
/* sleep checking until interface is running */
1121
for(int i=0; i < delay * 4; i++){
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);
1122
926
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1123
927
if(ret == -1){
1124
928
perror("ioctl SIOCGIFFLAGS");
1125
} else if(network.ifr_flags & IFF_RUNNING){
1126
break;
1127
}
1128
struct timespec sleeptime = { .tv_nsec = 250000000 };
1129
ret = nanosleep(&sleeptime, NULL);
1130
if(ret == -1 and errno != EINTR){
1131
perror("nanosleep");
1132
}
1133
}
1134
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1135
if(ret == -1){
1136
perror("close");
1137
}
1138
#ifdef __linux__
1139
if(restore_loglevel){
1140
/* Restores kernel loglevel to default */
1141
ret = klogctl(7, NULL, 0);
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));
1142
942
if(ret == -1){
1143
perror("klogctl");
943
perror("close");
1144
944
}
1145
945
}
1146
#endif /* __linux__ */
1147
}
1148
1149
uid = getuid();
1150
gid = getgid();
1151
1152
errno = 0;
1153
setgid(gid);
1154
if(ret == -1){
1155
perror("setgid");
1156
}
1157
1158
ret = setuid(uid);
1159
if(ret == -1){
1160
perror("setuid");
1161
}
1162
1163
ret = init_gnutls_global(pubkey, seckey);
1164
if(ret == -1){
1165
fprintf(stderr, "init_gnutls_global failed\n");
1166
exitcode = EXIT_FAILURE;
1167
goto end;
1168
} else {
1169
gnutls_initialized = true;
1170
}
1171
1172
if(mkdtemp(tempdir) == NULL){
1173
perror("mkdtemp");
1174
goto end;
1175
}
1176
tempdir_created = true;
1177
1178
if(not init_gpgme(pubkey, seckey, tempdir)){
1179
fprintf(stderr, "init_gpgme failed\n");
1180
exitcode = EXIT_FAILURE;
1181
goto end;
1182
} else {
1183
gpgme_initialized = true;
1184
}
1185
1186
if(interface[0] != '\0'){
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
1187
983
if_index = (AvahiIfIndex) if_nametoindex(interface);
1188
984
if(if_index == 0){
1189
985
fprintf(stderr, "No such interface: \"%s\"\n", interface);
1190
exitcode = EXIT_FAILURE;
1191
goto end;
1192
}
1193
}
1194
1195
if(connect_to != NULL){
1196
/* Connect directly, do not use Zeroconf */
1197
/* (Mainly meant for debugging) */
1198
char *address = strrchr(connect_to, ':');
1199
if(address == NULL){
1200
fprintf(stderr, "No colon in address\n");
1201
exitcode = EXIT_FAILURE;
1202
goto end;
1203
}
1204
uint16_t port;
1205
errno = 0;
1206
tmpmax = strtoimax(address+1, &tmp, 10);
1207
if(errno != 0 or tmp == address+1 or *tmp != '\0'
1208
or tmpmax != (uint16_t)tmpmax){
1209
fprintf(stderr, "Bad port number\n");
1210
exitcode = EXIT_FAILURE;
1211
goto end;
1212
}
1213
port = (uint16_t)tmpmax;
1214
*address = '\0';
1215
address = connect_to;
1216
/* Colon in address indicates IPv6 */
1217
int af;
1218
if(strchr(address, ':') != NULL){
1219
af = AF_INET6;
1220
} else {
1221
af = AF_INET;
1222
}
1223
ret = start_mandos_communication(address, port, if_index, af);
1224
if(ret < 0){
1225
exitcode = EXIT_FAILURE;
1226
} else {
1227
exitcode = EXIT_SUCCESS;
1228
}
1229
goto end;
1230
}
1231
1232
{
1233
AvahiServerConfig config;
1234
/* Do not publish any local Zeroconf records */
1235
avahi_server_config_init(&config);
1236
config.publish_hinfo = 0;
1237
config.publish_addresses = 0;
1238
config.publish_workstation = 0;
1239
config.publish_domain = 0;
1240
1241
/* Allocate a new server */
1242
mc.server = avahi_server_new(avahi_simple_poll_get
1243
(mc.simple_poll), &config, NULL,
1244
NULL, &error);
1245
1246
/* Free the Avahi configuration data */
1247
avahi_server_config_free(&config);
1248
}
1249
1250
/* Check if creating the Avahi server object succeeded */
1251
if(mc.server == NULL){
1252
fprintf(stderr, "Failed to create Avahi server: %s\n",
1253
avahi_strerror(error));
1254
exitcode = EXIT_FAILURE;
1255
goto end;
1256
}
1257
1258
/* Create the Avahi service browser */
1259
sb = avahi_s_service_browser_new(mc.server, if_index,
1260
AVAHI_PROTO_INET6, "_mandos._tcp",
1261
NULL, 0, browse_callback, NULL);
1262
if(sb == NULL){
1263
fprintf(stderr, "Failed to create service browser: %s\n",
1264
avahi_strerror(avahi_server_errno(mc.server)));
1265
exitcode = EXIT_FAILURE;
1266
goto end;
1267
}
1268
1269
/* Run the main loop */
1270
1271
if(debug){
1272
fprintf(stderr, "Starting Avahi loop search\n");
1273
}
1274
1275
avahi_simple_poll_loop(mc.simple_poll);
1276
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
1277
1078
end:
1278
1279
if(debug){
1280
fprintf(stderr, "%s exiting\n", argv[0]);
1281
}
1282
1283
/* Cleanup things */
1284
if(sb != NULL)
1285
avahi_s_service_browser_free(sb);
1286
1287
if(mc.server != NULL)
1288
avahi_server_free(mc.server);
1289
1290
if(mc.simple_poll != NULL)
1291
avahi_simple_poll_free(mc.simple_poll);
1292
1293
if(gnutls_initialized){
1294
gnutls_certificate_free_credentials(mc.cred);
1295
gnutls_global_deinit();
1296
gnutls_dh_params_deinit(mc.dh_params);
1297
}
1298
1299
if(gpgme_initialized){
1300
gpgme_release(mc.ctx);
1301
}
1302
1303
/* Removes the temp directory used by GPGME */
1304
if(tempdir_created){
1305
DIR *d;
1306
struct dirent *direntry;
1307
d = opendir(tempdir);
1308
if(d == NULL){
1309
if(errno != ENOENT){
1310
perror("opendir");
1311
}
1312
} else {
1313
while(true){
1314
direntry = readdir(d);
1315
if(direntry == NULL){
1316
break;
1317
}
1318
/* Skip "." and ".." */
1319
if(direntry->d_name[0] == '.'
1320
and (direntry->d_name[1] == '\0'
1321
or (direntry->d_name[1] == '.'
1322
and direntry->d_name[2] == '\0'))){
1323
continue;
1324
}
1325
char *fullname = NULL;
1326
ret = asprintf(&fullname, "%s/%s", tempdir,
1327
direntry->d_name);
1328
if(ret < 0){
1329
perror("asprintf");
1330
continue;
1331
}
1332
ret = remove(fullname);
1333
if(ret == -1){
1334
fprintf(stderr, "remove(\"%s\"): %s\n", fullname,
1335
strerror(errno));
1336
}
1337
free(fullname);
1338
}
1339
closedir(d);
1340
}
1341
ret = rmdir(tempdir);
1342
if(ret == -1 and errno != ENOENT){
1343
perror("rmdir");
1344
}
1345
}
1346
1347
return exitcode;
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;
1348
1144
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0