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- Committer: Björn Påhlsson
- Date: 2008-08-03 17:24:47 UTC
- mfrom: (40 mandos)
- mto: (24.1.154 mandos) (237.4.3 mandos-release)
- mto: This revision was merged to the branch mainline in revision 41.
- Revision ID: belorn@braxen-20080803172447-uma248p1s4cbsp02
merge +
mandosclient
Added a adjustbuffer function.
mandosclient
Added a adjustbuffer function.
- files modified:
- TODO
added
removed
plugins.d/mandosclient.c
39
39
#include <stdlib.h>
40
40
#include <time.h>
41
41
#include <net/if.h> /* if_nametoindex */
42
#include <sys/ioctl.h> // ioctl, ifreq, SIOCGIFFLAGS, IFF_UP, SIOCSIFFLAGS
43
#include <net/if.h> // ioctl, ifreq, SIOCGIFFLAGS, IFF_UP, SIOCSIFFLAGS
42
#include <sys/ioctl.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
43
SIOCSIFFLAGS */
44
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
45
SIOCSIFFLAGS */
44
46
45
47
#include <avahi-core/core.h>
46
48
#include <avahi-core/lookup.h>
49
51
#include <avahi-common/malloc.h>
50
52
#include <avahi-common/error.h>
51
53
52
//mandos client part
54
/* Mandos client part */
53
55
#include <sys/types.h> /* socket(), inet_pton() */
54
56
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
55
57
struct in6_addr, inet_pton() */
62
64
#include <string.h> /* memset */
63
65
#include <arpa/inet.h> /* inet_pton() */
64
66
#include <iso646.h> /* not */
67
#include <net/if.h> /* IF_NAMESIZE */
65
68
66
// gpgme
69
/* GPGME */
67
70
#include <errno.h> /* perror() */
68
71
#include <gpgme.h>
69
72
70
// getopt long
73
/* getopt_long */
71
74
#include <getopt.h>
72
75
73
76
#define BUFFER_SIZE 256
74
#define DH_BITS 1024
75
77
76
static const char *certdir = "/conf/conf.d/mandos";
77
static const char *certfile = "openpgp-client.txt";
78
static const char *certkey = "openpgp-client-key.txt";
78
static const char *keydir = "/conf/conf.d/mandos";
79
static const char *pubkeyfile = "pubkey.txt";
80
static const char *seckeyfile = "seckey.txt";
79
81
80
82
bool debug = false;
81
83
82
84
const char mandos_protocol_version[] = "1";
83
85
86
/* Used for passing in values through all the callback functions */
84
87
typedef struct {
85
88
AvahiSimplePoll *simple_poll;
86
89
AvahiServer *server;
89
92
const char *priority;
90
93
} mandos_context;
91
94
92
size_t adjustbuffer(char *buffer, size_t buffer_length,
95
size_t adjustbuffer(char **buffer, size_t buffer_length,
93
96
size_t buffer_capacity){
94
97
if (buffer_length + BUFFER_SIZE > buffer_capacity){
95
buffer = realloc(buffer, buffer_capacity + BUFFER_SIZE);
98
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
96
99
if (buffer == NULL){
97
100
return 0;
98
101
}
101
104
return buffer_capacity;
102
105
}
103
106
104
static ssize_t pgp_packet_decrypt (char *packet, size_t packet_size,
105
char **new_packet,
107
/*
108
* Decrypt OpenPGP data using keyrings in HOMEDIR.
109
* Returns -1 on error
110
*/
111
static ssize_t pgp_packet_decrypt (const char *cryptotext,
112
size_t crypto_size,
113
char **plaintext,
106
114
const char *homedir){
107
115
gpgme_data_t dh_crypto, dh_plain;
108
116
gpgme_ctx_t ctx;
109
117
gpgme_error_t rc;
110
118
ssize_t ret;
111
size_t new_packet_capacity = 0;
112
ssize_t new_packet_length = 0;
119
size_t plaintext_capacity = 0;
120
ssize_t plaintext_length = 0;
113
121
gpgme_engine_info_t engine_info;
114
122
115
123
if (debug){
116
fprintf(stderr, "Trying to decrypt OpenPGP packet\n");
124
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
117
125
}
118
126
119
127
/* Init GPGME */
125
133
return -1;
126
134
}
127
135
128
/* Set GPGME home directory */
136
/* Set GPGME home directory for the OpenPGP engine only */
129
137
rc = gpgme_get_engine_info (&engine_info);
130
138
if (rc != GPG_ERR_NO_ERROR){
131
139
fprintf(stderr, "bad gpgme_get_engine_info: %s: %s\n",
141
149
engine_info = engine_info->next;
142
150
}
143
151
if(engine_info == NULL){
144
fprintf(stderr, "Could not set home dir to %s\n", homedir);
152
fprintf(stderr, "Could not set GPGME home dir to %s\n", homedir);
145
153
return -1;
146
154
}
147
155
148
/* Create new GPGME data buffer from packet buffer */
149
rc = gpgme_data_new_from_mem(&dh_crypto, packet, packet_size, 0);
156
/* Create new GPGME data buffer from memory cryptotext */
157
rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,
158
0);
150
159
if (rc != GPG_ERR_NO_ERROR){
151
160
fprintf(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
152
161
gpgme_strsource(rc), gpgme_strerror(rc));
158
167
if (rc != GPG_ERR_NO_ERROR){
159
168
fprintf(stderr, "bad gpgme_data_new: %s: %s\n",
160
169
gpgme_strsource(rc), gpgme_strerror(rc));
170
gpgme_data_release(dh_crypto);
161
171
return -1;
162
172
}
163
173
166
176
if (rc != GPG_ERR_NO_ERROR){
167
177
fprintf(stderr, "bad gpgme_new: %s: %s\n",
168
178
gpgme_strsource(rc), gpgme_strerror(rc));
169
return -1;
179
plaintext_length = -1;
180
goto decrypt_end;
170
181
}
171
182
172
/* Decrypt data from the FILE pointer to the plaintext data
173
buffer */
183
/* Decrypt data from the cryptotext data buffer to the plaintext
184
data buffer */
174
185
rc = gpgme_op_decrypt(ctx, dh_crypto, dh_plain);
175
186
if (rc != GPG_ERR_NO_ERROR){
176
187
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
177
188
gpgme_strsource(rc), gpgme_strerror(rc));
178
return -1;
189
plaintext_length = -1;
190
goto decrypt_end;
179
191
}
180
192
181
193
if(debug){
182
fprintf(stderr, "Decryption of OpenPGP packet succeeded\n");
194
fprintf(stderr, "Decryption of OpenPGP data succeeded\n");
183
195
}
184
196
185
197
if (debug){
186
198
gpgme_decrypt_result_t result;
187
199
result = gpgme_op_decrypt_result(ctx);
211
223
}
212
224
}
213
225
214
/* Delete the GPGME FILE pointer cryptotext data buffer */
215
gpgme_data_release(dh_crypto);
216
217
226
/* Seek back to the beginning of the GPGME plaintext data buffer */
218
227
if (gpgme_data_seek(dh_plain, (off_t) 0, SEEK_SET) == -1){
219
228
perror("pgpme_data_seek");
229
plaintext_length = -1;
230
goto decrypt_end;
220
231
}
221
232
222
*new_packet = 0;
233
*plaintext = NULL;
223
234
while(true){
224
new_packet_capacity = adjustbuffer(*new_packet, new_packet_length,
225
new_packet_capacity);
226
if (new_packet_capacity == 0){
235
plaintext_capacity = adjustbuffer(plaintext, (size_t)plaintext_length,
236
plaintext_capacity);
237
if (plaintext_capacity == 0){
227
238
perror("adjustbuffer");
228
return -1;
229
}
230
new_packet_capacity += BUFFER_SIZE;
239
plaintext_length = -1;
240
goto decrypt_end;
231
241
}
232
242
233
ret = gpgme_data_read(dh_plain, *new_packet + new_packet_length,
243
ret = gpgme_data_read(dh_plain, *plaintext + plaintext_length,
234
244
BUFFER_SIZE);
235
245
/* Print the data, if any */
236
246
if (ret == 0){
247
/* EOF */
237
248
break;
238
249
}
239
250
if(ret < 0){
240
251
perror("gpgme_data_read");
241
return -1;
252
plaintext_length = -1;
253
goto decrypt_end;
242
254
}
243
new_packet_length += ret;
255
plaintext_length += ret;
244
256
}
245
257
246
/* FIXME: check characters before printing to screen so to not print
247
terminal control characters */
248
/* if(debug){ */
249
/* fprintf(stderr, "decrypted password is: "); */
250
/* fwrite(*new_packet, 1, new_packet_length, stderr); */
251
/* fprintf(stderr, "\n"); */
252
/* } */
258
if(debug){
259
fprintf(stderr, "Decrypted password is: ");
260
for(ssize_t i = 0; i < plaintext_length; i++){
261
fprintf(stderr, "%02hhX ", (*plaintext)[i]);
262
}
263
fprintf(stderr, "\n");
264
}
265
266
decrypt_end:
267
268
/* Delete the GPGME cryptotext data buffer */
269
gpgme_data_release(dh_crypto);
253
270
254
271
/* Delete the GPGME plaintext data buffer */
255
272
gpgme_data_release(dh_plain);
256
return new_packet_length;
273
return plaintext_length;
257
274
}
258
275
259
276
static const char * safer_gnutls_strerror (int value) {
263
280
return ret;
264
281
}
265
282
283
/* GnuTLS log function callback */
266
284
static void debuggnutls(__attribute__((unused)) int level,
267
285
const char* string){
268
fprintf(stderr, "%s", string);
286
fprintf(stderr, "GnuTLS: %s", string);
269
287
}
270
288
271
static int initgnutls(mandos_context *mc){
272
const char *err;
289
static int initgnutls(mandos_context *mc, gnutls_session_t *session,
290
gnutls_dh_params_t *dh_params){
273
291
int ret;
274
292
275
293
if(debug){
278
296
279
297
if ((ret = gnutls_global_init ())
280
298
!= GNUTLS_E_SUCCESS) {
281
fprintf (stderr, "global_init: %s\n", safer_gnutls_strerror(ret));
299
fprintf (stderr, "GnuTLS global_init: %s\n",
300
safer_gnutls_strerror(ret));
282
301
return -1;
283
302
}
284
303
285
304
if (debug){
305
/* "Use a log level over 10 to enable all debugging options."
306
* - GnuTLS manual
307
*/
286
308
gnutls_global_set_log_level(11);
287
309
gnutls_global_set_log_function(debuggnutls);
288
310
}
289
311
290
/* openpgp credentials */
291
if ((ret = gnutls_certificate_allocate_credentials (&es->cred))
312
/* OpenPGP credentials */
313
if ((ret = gnutls_certificate_allocate_credentials (&mc->cred))
292
314
!= GNUTLS_E_SUCCESS) {
293
fprintf (stderr, "memory error: %s\n",
315
fprintf (stderr, "GnuTLS memory error: %s\n",
294
316
safer_gnutls_strerror(ret));
295
317
return -1;
296
318
}
297
319
298
320
if(debug){
299
321
fprintf(stderr, "Attempting to use OpenPGP certificate %s"
300
" and keyfile %s as GnuTLS credentials\n", certfile,
301
certkey);
322
" and keyfile %s as GnuTLS credentials\n", pubkeyfile,
323
seckeyfile);
302
324
}
303
325
304
326
ret = gnutls_certificate_set_openpgp_key_file
305
(es->cred, certfile, certkey, GNUTLS_OPENPGP_FMT_BASE64);
327
(mc->cred, pubkeyfile, seckeyfile, GNUTLS_OPENPGP_FMT_BASE64);
306
328
if (ret != GNUTLS_E_SUCCESS) {
307
fprintf
308
(stderr, "Error[%d] while reading the OpenPGP key pair ('%s',"
309
" '%s')\n",
310
ret, certfile, certkey);
311
fprintf(stdout, "The Error is: %s\n",
329
fprintf(stderr,
330
"Error[%d] while reading the OpenPGP key pair ('%s',"
331
" '%s')\n", ret, pubkeyfile, seckeyfile);
332
fprintf(stdout, "The GnuTLS error is: %s\n",
312
333
safer_gnutls_strerror(ret));
313
334
return -1;
314
335
}
315
336
316
//GnuTLS server initialization
317
if ((ret = gnutls_dh_params_init (&es->dh_params))
318
!= GNUTLS_E_SUCCESS) {
319
fprintf (stderr, "Error in dh parameter initialization: %s\n",
320
safer_gnutls_strerror(ret));
321
return -1;
322
}
323
324
if ((ret = gnutls_dh_params_generate2 (es->dh_params, DH_BITS))
325
!= GNUTLS_E_SUCCESS) {
326
fprintf (stderr, "Error in prime generation: %s\n",
327
safer_gnutls_strerror(ret));
328
return -1;
329
}
330
331
gnutls_certificate_set_dh_params (es->cred, es->dh_params);
332
333
// GnuTLS session creation
334
if ((ret = gnutls_init (&es->session, GNUTLS_SERVER))
335
!= GNUTLS_E_SUCCESS){
337
/* GnuTLS server initialization */
338
ret = gnutls_dh_params_init(dh_params);
339
if (ret != GNUTLS_E_SUCCESS) {
340
fprintf (stderr, "Error in GnuTLS DH parameter initialization:"
341
" %s\n", safer_gnutls_strerror(ret));
342
return -1;
343
}
344
ret = gnutls_dh_params_generate2(*dh_params, mc->dh_bits);
345
if (ret != GNUTLS_E_SUCCESS) {
346
fprintf (stderr, "Error in GnuTLS prime generation: %s\n",
347
safer_gnutls_strerror(ret));
348
return -1;
349
}
350
351
gnutls_certificate_set_dh_params(mc->cred, *dh_params);
352
353
/* GnuTLS session creation */
354
ret = gnutls_init(session, GNUTLS_SERVER);
355
if (ret != GNUTLS_E_SUCCESS){
336
356
fprintf(stderr, "Error in GnuTLS session initialization: %s\n",
337
357
safer_gnutls_strerror(ret));
338
358
}
339
359
340
if ((ret = gnutls_priority_set_direct (es->session, mc->priority, &err))
341
!= GNUTLS_E_SUCCESS) {
342
fprintf(stderr, "Syntax error at: %s\n", err);
343
fprintf(stderr, "GnuTLS error: %s\n",
344
safer_gnutls_strerror(ret));
345
return -1;
360
{
361
const char *err;
362
ret = gnutls_priority_set_direct(*session, mc->priority, &err);
363
if (ret != GNUTLS_E_SUCCESS) {
364
fprintf(stderr, "Syntax error at: %s\n", err);
365
fprintf(stderr, "GnuTLS error: %s\n",
366
safer_gnutls_strerror(ret));
367
return -1;
368
}
346
369
}
347
370
348
if ((ret = gnutls_credentials_set
349
(es->session, GNUTLS_CRD_CERTIFICATE, es->cred))
350
!= GNUTLS_E_SUCCESS) {
351
fprintf(stderr, "Error setting a credentials set: %s\n",
371
ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,
372
mc->cred);
373
if (ret != GNUTLS_E_SUCCESS) {
374
fprintf(stderr, "Error setting GnuTLS credentials: %s\n",
352
375
safer_gnutls_strerror(ret));
353
376
return -1;
354
377
}
355
378
356
379
/* ignore client certificate if any. */
357
gnutls_certificate_server_set_request (es->session,
380
gnutls_certificate_server_set_request (*session,
358
381
GNUTLS_CERT_IGNORE);
359
382
360
gnutls_dh_set_prime_bits (es->session, DH_BITS);
383
gnutls_dh_set_prime_bits (*session, mc->dh_bits);
361
384
362
385
return 0;
363
386
}
364
387
388
/* Avahi log function callback */
365
389
static void empty_log(__attribute__((unused)) AvahiLogLevel level,
366
390
__attribute__((unused)) const char *txt){}
367
391
392
/* Called when a Mandos server is found */
368
393
static int start_mandos_communication(const char *ip, uint16_t port,
369
394
AvahiIfIndex if_index,
370
395
mandos_context *mc){
371
396
int ret, tcp_sd;
372
397
struct sockaddr_in6 to;
373
encrypted_session es;
374
398
char *buffer = NULL;
375
399
char *decrypted_buffer;
376
400
size_t buffer_length = 0;
379
403
size_t written;
380
404
int retval = 0;
381
405
char interface[IF_NAMESIZE];
406
gnutls_session_t session;
407
gnutls_dh_params_t dh_params;
408
409
ret = initgnutls (mc, &session, &dh_params);
410
if (ret != 0){
411
return -1;
412
}
382
413
383
414
if(debug){
384
415
fprintf(stderr, "Setting up a tcp connection to %s, port %d\n",
393
424
394
425
if(debug){
395
426
if(if_indextoname((unsigned int)if_index, interface) == NULL){
396
if(debug){
397
perror("if_indextoname");
398
}
427
perror("if_indextoname");
399
428
return -1;
400
429
}
401
402
430
fprintf(stderr, "Binding to interface %s\n", interface);
403
431
}
404
432
405
433
memset(&to,0,sizeof(to)); /* Spurious warning */
406
434
to.sin6_family = AF_INET6;
435
/* It would be nice to have a way to detect if we were passed an
436
IPv4 address here. Now we assume an IPv6 address. */
407
437
ret = inet_pton(AF_INET6, ip, &to.sin6_addr);
408
438
if (ret < 0 ){
409
439
perror("inet_pton");
410
440
return -1;
411
}
441
}
412
442
if(ret == 0){
413
443
fprintf(stderr, "Bad address: %s\n", ip);
414
444
return -1;
419
449
420
450
if(debug){
421
451
fprintf(stderr, "Connection to: %s, port %d\n", ip, port);
422
/* char addrstr[INET6_ADDRSTRLEN]; */
423
/* if(inet_ntop(to.sin6_family, &(to.sin6_addr), addrstr, */
424
/* sizeof(addrstr)) == NULL){ */
425
/* perror("inet_ntop"); */
426
/* } else { */
427
/* fprintf(stderr, "Really connecting to: %s, port %d\n", */
428
/* addrstr, ntohs(to.sin6_port)); */
429
/* } */
452
char addrstr[INET6_ADDRSTRLEN] = "";
453
if(inet_ntop(to.sin6_family, &(to.sin6_addr), addrstr,
454
sizeof(addrstr)) == NULL){
455
perror("inet_ntop");
456
} else {
457
if(strcmp(addrstr, ip) != 0){
458
fprintf(stderr, "Canonical address form: %s\n", addrstr);
459
}
460
}
430
461
}
431
462
432
463
ret = connect(tcp_sd, (struct sockaddr *) &to, sizeof(to));
435
466
return -1;
436
467
}
437
468
438
char *out = mandos_protocol_version;
469
const char *out = mandos_protocol_version;
439
470
written = 0;
440
471
while (true){
441
472
size_t out_size = strlen(out);
444
475
if (ret == -1){
445
476
perror("write");
446
477
retval = -1;
447
goto end;
478
goto mandos_end;
448
479
}
449
written += ret;
480
written += (size_t)ret;
450
481
if(written < out_size){
451
482
continue;
452
483
} else {
459
490
}
460
491
}
461
492
462
ret = initgnutls (&es);
463
if (ret != 0){
464
retval = -1;
465
return -1;
466
}
467
468
gnutls_transport_set_ptr (es.session,
469
(gnutls_transport_ptr_t) tcp_sd);
470
471
493
if(debug){
472
494
fprintf(stderr, "Establishing TLS session with %s\n", ip);
473
495
}
474
496
475
ret = gnutls_handshake (es.session);
497
gnutls_transport_set_ptr (session, (gnutls_transport_ptr_t) tcp_sd);
498
499
ret = gnutls_handshake (session);
476
500
477
501
if (ret != GNUTLS_E_SUCCESS){
478
502
if(debug){
479
fprintf(stderr, "\n*** Handshake failed ***\n");
503
fprintf(stderr, "*** GnuTLS Handshake failed ***\n");
480
504
gnutls_perror (ret);
481
505
}
482
506
retval = -1;
483
goto exit;
507
goto mandos_end;
484
508
}
485
509
486
//Retrieve OpenPGP packet that contains the wanted password
510
/* Read OpenPGP packet that contains the wanted password */
487
511
488
512
if(debug){
489
513
fprintf(stderr, "Retrieving pgp encrypted password from %s\n",
491
515
}
492
516
493
517
while(true){
494
buffer_capacity = adjustbuffer(buffer, buffer_length, buffer_capacity);
518
buffer_capacity = adjustbuffer(&buffer, buffer_length, buffer_capacity);
495
519
if (buffer_capacity == 0){
496
520
perror("adjustbuffer");
497
521
retval = -1;
498
goto exit;
522
goto mandos_end;
499
523
}
500
524
501
ret = gnutls_record_recv
502
(es.session, buffer+buffer_length, BUFFER_SIZE);
525
ret = gnutls_record_recv(session, buffer+buffer_length,
526
BUFFER_SIZE);
503
527
if (ret == 0){
504
528
break;
505
529
}
509
533
case GNUTLS_E_AGAIN:
510
534
break;
511
535
case GNUTLS_E_REHANDSHAKE:
512
ret = gnutls_handshake (es.session);
536
ret = gnutls_handshake (session);
513
537
if (ret < 0){
514
fprintf(stderr, "\n*** Handshake failed ***\n");
538
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
515
539
gnutls_perror (ret);
516
540
retval = -1;
517
goto exit;
541
goto mandos_end;
518
542
}
519
543
break;
520
544
default:
521
545
fprintf(stderr, "Unknown error while reading data from"
522
" encrypted session with mandos server\n");
546
" encrypted session with Mandos server\n");
523
547
retval = -1;
524
gnutls_bye (es.session, GNUTLS_SHUT_RDWR);
525
goto exit;
548
gnutls_bye (session, GNUTLS_SHUT_RDWR);
549
goto mandos_end;
526
550
}
527
551
} else {
528
552
buffer_length += (size_t) ret;
529
553
}
530
554
}
531
555
556
if(debug){
557
fprintf(stderr, "Closing TLS session\n");
558
}
559
560
gnutls_bye (session, GNUTLS_SHUT_RDWR);
561
532
562
if (buffer_length > 0){
533
563
decrypted_buffer_size = pgp_packet_decrypt(buffer,
534
564
buffer_length,
535
565
&decrypted_buffer,
536
certdir);
566
keydir);
537
567
if (decrypted_buffer_size >= 0){
538
568
written = 0;
539
569
while(written < (size_t) decrypted_buffer_size){
555
585
retval = -1;
556
586
}
557
587
}
558
559
//shutdown procedure
560
561
if(debug){
562
fprintf(stderr, "Closing TLS session\n");
563
}
564
588
589
/* Shutdown procedure */
590
591
mandos_end:
565
592
free(buffer);
566
gnutls_bye (es.session, GNUTLS_SHUT_RDWR);
567
exit:
568
593
close(tcp_sd);
569
gnutls_deinit (es.session);
570
gnutls_certificate_free_credentials (es.cred);
594
gnutls_deinit (session);
595
gnutls_certificate_free_credentials (mc->cred);
571
596
gnutls_global_deinit ();
572
597
return retval;
573
598
}
574
599
575
static void resolve_callback( AvahiSServiceResolver *r,
576
AvahiIfIndex interface,
577
AVAHI_GCC_UNUSED AvahiProtocol protocol,
578
AvahiResolverEvent event,
579
const char *name,
580
const char *type,
581
const char *domain,
582
const char *host_name,
583
const AvahiAddress *address,
584
uint16_t port,
585
AVAHI_GCC_UNUSED AvahiStringList *txt,
586
AVAHI_GCC_UNUSED AvahiLookupResultFlags flags,
587
AVAHI_GCC_UNUSED void* userdata) {
600
static void resolve_callback(AvahiSServiceResolver *r,
601
AvahiIfIndex interface,
602
AVAHI_GCC_UNUSED AvahiProtocol protocol,
603
AvahiResolverEvent event,
604
const char *name,
605
const char *type,
606
const char *domain,
607
const char *host_name,
608
const AvahiAddress *address,
609
uint16_t port,
610
AVAHI_GCC_UNUSED AvahiStringList *txt,
611
AVAHI_GCC_UNUSED AvahiLookupResultFlags
612
flags,
613
void* userdata) {
588
614
mandos_context *mc = userdata;
589
615
assert(r); /* Spurious warning */
590
616
594
620
switch (event) {
595
621
default:
596
622
case AVAHI_RESOLVER_FAILURE:
597
fprintf(stderr, "(Resolver) Failed to resolve service '%s' of"
598
" type '%s' in domain '%s': %s\n", name, type, domain,
623
fprintf(stderr, "(Avahi Resolver) Failed to resolve service '%s'"
624
" of type '%s' in domain '%s': %s\n", name, type, domain,
599
625
avahi_strerror(avahi_server_errno(mc->server)));
600
626
break;
601
627
604
630
char ip[AVAHI_ADDRESS_STR_MAX];
605
631
avahi_address_snprint(ip, sizeof(ip), address);
606
632
if(debug){
607
fprintf(stderr, "Mandos server \"%s\" found on %s (%s) on"
608
" port %d\n", name, host_name, ip, port);
633
fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %d) on"
634
" port %d\n", name, host_name, ip, interface, port);
609
635
}
610
636
int ret = start_mandos_communication(ip, port, interface, mc);
611
637
if (ret == 0){
623
649
const char *name,
624
650
const char *type,
625
651
const char *domain,
626
AVAHI_GCC_UNUSED AvahiLookupResultFlags flags,
652
AVAHI_GCC_UNUSED AvahiLookupResultFlags
653
flags,
627
654
void* userdata) {
628
655
mandos_context *mc = userdata;
629
656
assert(b); /* Spurious warning */
634
661
switch (event) {
635
662
default:
636
663
case AVAHI_BROWSER_FAILURE:
637
638
fprintf(stderr, "(Browser) %s\n",
664
665
fprintf(stderr, "(Avahi browser) %s\n",
639
666
avahi_strerror(avahi_server_errno(mc->server)));
640
667
avahi_simple_poll_quit(mc->simple_poll);
641
668
return;
642
669
643
670
case AVAHI_BROWSER_NEW:
644
/* We ignore the returned resolver object. In the callback
645
function we free it. If the server is terminated before
646
the callback function is called the server will free
647
the resolver for us. */
648
649
if (!(avahi_s_service_resolver_new(mc->server, interface, protocol, name,
650
type, domain,
671
/* We ignore the returned Avahi resolver object. In the callback
672
function we free it. If the Avahi server is terminated before
673
the callback function is called the Avahi server will free the
674
resolver for us. */
675
676
if (!(avahi_s_service_resolver_new(mc->server, interface,
677
protocol, name, type, domain,
651
678
AVAHI_PROTO_INET6, 0,
652
679
resolve_callback, mc)))
653
fprintf(stderr, "Failed to resolve service '%s': %s\n", name,
654
avahi_strerror(avahi_server_errno(s)));
680
fprintf(stderr, "Avahi: Failed to resolve service '%s': %s\n",
681
name, avahi_strerror(avahi_server_errno(mc->server)));
655
682
break;
656
683
657
684
case AVAHI_BROWSER_REMOVE:
658
685
break;
659
686
660
687
case AVAHI_BROWSER_ALL_FOR_NOW:
661
688
case AVAHI_BROWSER_CACHE_EXHAUSTED:
689
if(debug){
690
fprintf(stderr, "No Mandos server found, still searching...\n");
691
}
662
692
break;
663
693
}
664
694
}
673
703
return NULL;
674
704
}
675
705
if(f_len > 0){
676
memcpy(tmp, first, f_len);
706
memcpy(tmp, first, f_len); /* Spurious warning */
677
707
}
678
708
tmp[f_len] = '/';
679
709
if(s_len > 0){
680
memcpy(tmp + f_len + 1, second, s_len);
710
memcpy(tmp + f_len + 1, second, s_len); /* Spurious warning */
681
711
}
682
712
tmp[f_len + 1 + s_len] = '\0';
683
713
return tmp;
684
714
}
685
715
686
716
687
int main(AVAHI_GCC_UNUSED int argc, AVAHI_GCC_UNUSED char*argv[]) {
688
AvahiServerConfig config;
717
int main(int argc, char *argv[]){
689
718
AvahiSServiceBrowser *sb = NULL;
690
719
int error;
691
720
int ret;
692
int returncode = EXIT_SUCCESS;
721
int exitcode = EXIT_SUCCESS;
693
722
const char *interface = "eth0";
694
723
struct ifreq network;
695
724
int sd;
696
725
char *connect_to = NULL;
697
726
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
698
727
mandos_context mc = { .simple_poll = NULL, .server = NULL,
699
.dh_bits = 2048, .priority = "SECURE256"};
728
.dh_bits = 1024, .priority = "SECURE256"};
700
729
701
while (true){
702
static struct option long_options[] = {
703
{"debug", no_argument, (int *)&debug, 1},
704
{"connect", required_argument, 0, 'C'},
705
{"interface", required_argument, 0, 'i'},
706
{"certdir", required_argument, 0, 'd'},
707
{"certkey", required_argument, 0, 'c'},
708
{"certfile", required_argument, 0, 'k'},
709
{"dh_bits", required_argument, 0, 'D'},
710
{"priority", required_argument, 0, 'p'},
711
{0, 0, 0, 0} };
712
713
int option_index = 0;
714
ret = getopt_long (argc, argv, "i:", long_options,
715
&option_index);
716
717
if (ret == -1){
718
break;
719
}
720
721
switch(ret){
722
case 0:
723
break;
724
case 'i':
725
interface = optarg;
726
break;
727
case 'C':
728
connect_to = optarg;
729
break;
730
case 'd':
731
certdir = optarg;
732
break;
733
case 'c':
734
certfile = optarg;
735
break;
736
case 'k':
737
certkey = optarg;
738
break;
739
case 'D':
740
{
741
long int tmp;
730
{
731
/* Temporary int to get the address of for getopt_long */
732
int debug_int = debug ? 1 : 0;
733
while (true){
734
struct option long_options[] = {
735
{"debug", no_argument, &debug_int, 1},
736
{"connect", required_argument, NULL, 'c'},
737
{"interface", required_argument, NULL, 'i'},
738
{"keydir", required_argument, NULL, 'd'},
739
{"seckey", required_argument, NULL, 's'},
740
{"pubkey", required_argument, NULL, 'p'},
741
{"dh-bits", required_argument, NULL, 'D'},
742
{"priority", required_argument, NULL, 'P'},
743
{0, 0, 0, 0} };
744
745
int option_index = 0;
746
ret = getopt_long (argc, argv, "i:", long_options,
747
&option_index);
748
749
if (ret == -1){
750
break;
751
}
752
753
switch(ret){
754
case 0:
755
break;
756
case 'i':
757
interface = optarg;
758
break;
759
case 'c':
760
connect_to = optarg;
761
break;
762
case 'd':
763
keydir = optarg;
764
break;
765
case 'p':
766
pubkeyfile = optarg;
767
break;
768
case 's':
769
seckeyfile = optarg;
770
break;
771
case 'D':
742
772
errno = 0;
743
tmp = strtol(optarg, NULL, 10);
744
if (errno == ERANGE){
773
mc.dh_bits = (unsigned int) strtol(optarg, NULL, 10);
774
if (errno){
745
775
perror("strtol");
746
776
exit(EXIT_FAILURE);
747
777
}
748
mc.dh_bits = tmp;
778
break;
779
case 'P':
780
mc.priority = optarg;
781
break;
782
case '?':
783
default:
784
/* getopt_long() has already printed a message about the
785
unrcognized option, so just exit. */
786
exit(EXIT_FAILURE);
749
787
}
750
break;
751
case 'p':
752
mc.priority = optarg;
753
break;
754
default:
755
exit(EXIT_FAILURE);
756
788
}
757
}
758
759
certfile = combinepath(certdir, certfile);
760
if (certfile == NULL){
761
perror("combinepath");
762
returncode = EXIT_FAILURE;
763
goto exit;
764
}
765
766
certkey = combinepath(certdir, certkey);
767
if (certkey == NULL){
768
perror("combinepath");
769
returncode = EXIT_FAILURE;
770
goto exit;
789
/* Set the global debug flag from the temporary int */
790
debug = debug_int ? true : false;
791
}
792
793
pubkeyfile = combinepath(keydir, pubkeyfile);
794
if (pubkeyfile == NULL){
795
perror("combinepath");
796
exitcode = EXIT_FAILURE;
797
goto end;
798
}
799
800
seckeyfile = combinepath(keydir, seckeyfile);
801
if (seckeyfile == NULL){
802
perror("combinepath");
803
goto end;
771
804
}
772
805
773
806
if_index = (AvahiIfIndex) if_nametoindex(interface);
792
825
}
793
826
*address = '\0';
794
827
address = connect_to;
795
ret = start_mandos_communication(address, port, if_index);
828
ret = start_mandos_communication(address, port, if_index, &mc);
796
829
if(ret < 0){
797
830
exit(EXIT_FAILURE);
798
831
} else {
800
833
}
801
834
}
802
835
803
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
804
if(sd < 0) {
805
perror("socket");
806
returncode = EXIT_FAILURE;
807
goto exit;
808
}
809
strcpy(network.ifr_name, interface);
810
ret = ioctl(sd, SIOCGIFFLAGS, &network);
811
if(ret == -1){
812
813
perror("ioctl SIOCGIFFLAGS");
814
returncode = EXIT_FAILURE;
815
goto exit;
816
}
817
if((network.ifr_flags & IFF_UP) == 0){
818
network.ifr_flags |= IFF_UP;
819
ret = ioctl(sd, SIOCSIFFLAGS, &network);
836
/* If the interface is down, bring it up */
837
{
838
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
839
if(sd < 0) {
840
perror("socket");
841
exitcode = EXIT_FAILURE;
842
goto end;
843
}
844
strcpy(network.ifr_name, interface); /* Spurious warning */
845
ret = ioctl(sd, SIOCGIFFLAGS, &network);
820
846
if(ret == -1){
821
perror("ioctl SIOCSIFFLAGS");
822
returncode = EXIT_FAILURE;
823
goto exit;
824
}
847
perror("ioctl SIOCGIFFLAGS");
848
exitcode = EXIT_FAILURE;
849
goto end;
850
}
851
if((network.ifr_flags & IFF_UP) == 0){
852
network.ifr_flags |= IFF_UP;
853
ret = ioctl(sd, SIOCSIFFLAGS, &network);
854
if(ret == -1){
855
perror("ioctl SIOCSIFFLAGS");
856
exitcode = EXIT_FAILURE;
857
goto end;
858
}
859
}
860
close(sd);
825
861
}
826
close(sd);
827
862
828
863
if (not debug){
829
864
avahi_set_log_function(empty_log);
830
865
}
831
866
832
/* Initialize the psuedo-RNG */
867
/* Initialize the pseudo-RNG for Avahi */
833
868
srand((unsigned int) time(NULL));
834
835
/* Allocate main loop object */
836
if (!(mc.simple_poll = avahi_simple_poll_new())) {
837
fprintf(stderr, "Failed to create simple poll object.\n");
838
returncode = EXIT_FAILURE;
839
goto exit;
840
}
841
842
/* Do not publish any local records */
843
avahi_server_config_init(&config);
844
config.publish_hinfo = 0;
845
config.publish_addresses = 0;
846
config.publish_workstation = 0;
847
config.publish_domain = 0;
848
849
/* Allocate a new server */
850
mc.server = avahi_server_new(avahi_simple_poll_get(simple_poll),
851
&config, NULL, NULL, &error);
852
853
/* Free the configuration data */
854
avahi_server_config_free(&config);
855
856
/* Check if creating the server object succeeded */
857
if (!mc.server) {
858
fprintf(stderr, "Failed to create server: %s\n",
869
870
/* Allocate main Avahi loop object */
871
mc.simple_poll = avahi_simple_poll_new();
872
if (mc.simple_poll == NULL) {
873
fprintf(stderr, "Avahi: Failed to create simple poll"
874
" object.\n");
875
exitcode = EXIT_FAILURE;
876
goto end;
877
}
878
879
{
880
AvahiServerConfig config;
881
/* Do not publish any local Zeroconf records */
882
avahi_server_config_init(&config);
883
config.publish_hinfo = 0;
884
config.publish_addresses = 0;
885
config.publish_workstation = 0;
886
config.publish_domain = 0;
887
888
/* Allocate a new server */
889
mc.server = avahi_server_new(avahi_simple_poll_get
890
(mc.simple_poll), &config, NULL,
891
NULL, &error);
892
893
/* Free the Avahi configuration data */
894
avahi_server_config_free(&config);
895
}
896
897
/* Check if creating the Avahi server object succeeded */
898
if (mc.server == NULL) {
899
fprintf(stderr, "Failed to create Avahi server: %s\n",
859
900
avahi_strerror(error));
860
returncode = EXIT_FAILURE;
861
goto exit;
901
exitcode = EXIT_FAILURE;
902
goto end;
862
903
}
863
904
864
/* Create the service browser */
905
/* Create the Avahi service browser */
865
906
sb = avahi_s_service_browser_new(mc.server, if_index,
866
907
AVAHI_PROTO_INET6,
867
908
"_mandos._tcp", NULL, 0,
868
909
browse_callback, &mc);
869
if (!sb) {
910
if (sb == NULL) {
870
911
fprintf(stderr, "Failed to create service browser: %s\n",
871
912
avahi_strerror(avahi_server_errno(mc.server)));
872
returncode = EXIT_FAILURE;
873
goto exit;
913
exitcode = EXIT_FAILURE;
914
goto end;
874
915
}
875
916
876
917
/* Run the main loop */
877
918
878
919
if (debug){
879
fprintf(stderr, "Starting avahi loop search\n");
920
fprintf(stderr, "Starting Avahi loop search\n");
880
921
}
881
922
882
avahi_simple_poll_loop(simple_poll);
923
avahi_simple_poll_loop(mc.simple_poll);
883
924
884
exit:
925
end:
885
926
886
927
if (debug){
887
928
fprintf(stderr, "%s exiting\n", argv[0]);
888
929
}
889
930
890
931
/* Cleanup things */
891
if (sb)
932
if (sb != NULL)
892
933
avahi_s_service_browser_free(sb);
893
934
894
if (mc.server)
935
if (mc.server != NULL)
895
936
avahi_server_free(mc.server);
896
937
897
if (simple_poll)
898
avahi_simple_poll_free(simple_poll);
899
free(certfile);
900
free(certkey);
938
if (mc.simple_poll != NULL)
939
avahi_simple_poll_free(mc.simple_poll);
940
free(pubkeyfile);
941
free(seckeyfile);
901
942
902
return returncode;
943
return exitcode;
903
944
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0