To get this branch, use:
bzr branch
http://bzr.recompile.se/loggerhead/mandos/release
« back to all changes in this revision
Viewing changes to plugins.d/mandos-client.c
- browse files at revision 173
- compare with another revision
- download diff
- download tarball
- view history from revision 173
- Committer: Teddy Hogeborn
- Date: 2008-09-06 16:33:54 UTC
- Revision ID: teddy@fukt.bsnet.se-20080906163354-x2l238fvbs2xashj
* .bzrignore: Rename "password-request" to "mandos-client".
- files added:
- .bzrignore
- files removed:
- network-protocol.txt
- files renamed:
- mandos-client.c => plugin-runner.c
- mandos-client.xml => plugin-runner.xml
- plugins.d/password-request.c => plugins.d/mandos-client.c
- plugins.d/password-request.xml => plugins.d/mandos-client.xml
- files modified:
- Makefile
added
removed
plugins.d/mandos-client.c
32
32
#define _LARGEFILE_SOURCE
33
33
#define _FILE_OFFSET_BITS 64
34
34
35
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY() */
35
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), asprintf() */
36
36
37
#include <stdio.h> /* fprintf(), stderr, fwrite(), stdout, ferror() */
37
#include <stdio.h> /* fprintf(), stderr, fwrite(),
38
stdout, ferror() */
38
39
#include <stdint.h> /* uint16_t, uint32_t */
39
40
#include <stddef.h> /* NULL, size_t, ssize_t */
40
#include <stdlib.h> /* free() */
41
#include <stdlib.h> /* free(), EXIT_SUCCESS, EXIT_FAILURE,
42
srand() */
41
43
#include <stdbool.h> /* bool, true */
42
#include <string.h> /* memset(), strcmp(), strlen, strerror() */
43
#include <sys/ioctl.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
44
SIOCSIFFLAGS */
44
#include <string.h> /* memset(), strcmp(), strlen(),
45
strerror(), asprintf(), strcpy() */
46
#include <sys/ioctl.h> /* ioctl */
45
47
#include <sys/types.h> /* socket(), inet_pton(), sockaddr,
46
sockaddr_in6, PF_INET6, SOCK_STREAM, INET6_ADDRSTRLEN */
48
sockaddr_in6, PF_INET6,
49
SOCK_STREAM, INET6_ADDRSTRLEN,
50
uid_t, gid_t, open(), opendir(), DIR */
51
#include <sys/stat.h> /* open() */
47
52
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
48
53
struct in6_addr, inet_pton(),
49
54
connect() */
50
#include <assert.h>
51
#include <errno.h> /* perror() */
52
#include <time.h>
55
#include <fcntl.h> /* open() */
56
#include <dirent.h> /* opendir(), struct dirent, readdir() */
57
#include <inttypes.h> /* PRIu16 */
58
#include <assert.h> /* assert() */
59
#include <errno.h> /* perror(), errno */
60
#include <time.h> /* time() */
53
61
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
54
62
SIOCSIFFLAGS, if_indextoname(),
55
63
if_nametoindex(), IF_NAMESIZE */
56
#include <unistd.h> /* close(), SEEK_SET, off_t, write()*/
57
64
#include <netinet/in.h>
65
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
66
getuid(), getgid(), setuid(),
67
setgid() */
58
68
#include <arpa/inet.h> /* inet_pton(), htons */
59
#include <iso646.h> /* not */
60
#include <argp.h> /* struct argp_option,
61
struct argp_state, struct argp,
62
argp_parse() */
69
#include <iso646.h> /* not, and */
70
#include <argp.h> /* struct argp_option, error_t, struct
71
argp_state, struct argp,
72
argp_parse(), ARGP_KEY_ARG,
73
ARGP_KEY_END, ARGP_ERR_UNKNOWN */
63
74
64
75
/* Avahi */
65
#include <avahi-core/core.h> /* AvahiSimplePoll, AvahiServer,
66
AvahiIfIndex */
76
/* All Avahi types, constants and functions
77
Avahi*, avahi_*,
78
AVAHI_* */
79
#include <avahi-core/core.h>
67
80
#include <avahi-core/lookup.h>
68
#include <avahi-core/log.h> /* AvahiLogLevel */
81
#include <avahi-core/log.h>
69
82
#include <avahi-common/simple-watch.h>
70
83
#include <avahi-common/malloc.h>
71
84
#include <avahi-common/error.h>
72
85
73
86
/* GnuTLS */
74
#include <gnutls/gnutls.h> /* gnutls_certificate_credentials_t,
75
gnutls_dh_params_t,
76
gnutls_strerror(),
77
gnutls_global_init(),
78
gnutls_global_set_log_level(),
79
gnutls_global_set_log_function(),
80
gnutls_certificate_allocate_credentials(),
81
gnutls_global_deinit(),
82
gnutls_dh_params_init(),
83
gnutls_dh_params_generate(),
84
gnutls_certificate_set_dh_params(),
85
gnutls_certificate_free_credentials(),
86
gnutls_session_t, gnutls_init(),
87
gnutls_priority_set_direct(),
88
gnutls_deinit(),
89
gnutls_credentials_set(),
90
gnutls_certificate_server_set_request(),
91
gnutls_dh_set_prime_bits(),
92
gnutls_transport_set_ptr(),
93
gnutls_transport_ptr_t,
94
gnutls_handshake(),
95
gnutls_record_recv()
96
gnutls_perror(), gnutls_bye(),
87
#include <gnutls/gnutls.h> /* All GnuTLS types, constants and
88
functions:
89
gnutls_*
97
90
init_gnutls_session(),
98
GNUTLS_E_SUCCESS,
99
GNUTLS_CRD_CERTIFICATE,
100
GNUTLS_CERT_IGNORE,
101
GNUTLS_E_INTERRUPTED,
102
GNUTLS_E_AGAIN,
103
GNUTLS_E_REHANDSHAKE,
104
GNUTLS_SHUT_RDWR, */
105
#include <gnutls/openpgp.h> /* gnutls_certificate_set_openpgp_key_file(),
106
GNUTLS_OPENPGP_FMT_BASE64 */
91
GNUTLS_* */
92
#include <gnutls/openpgp.h> /* gnutls_certificate_set_openpgp_key_file(),
93
GNUTLS_OPENPGP_FMT_BASE64 */
107
94
108
95
/* GPGME */
109
#include <gpgme.h> /* gpgme_data_t, gpgme_ctx_t,
110
gpgme_error_t, gpgme_engine_info_t,
111
gpgme_check_version(),
112
gpgme_engine_check_version(),
113
gpgme_strsource(),
114
gpgme_strerror(),
115
gpgme_get_engine_info(),
116
gpgme_set_engine_info(),
117
gpgme_data_new_from_mem(),
118
gpgme_data_new(), gpgme_new(),
119
gpgme_op_decrypt(),
120
gpgme_decrypt_result_t,
121
gpgme_op_decrypt_result(),
122
gpgme_recipient_t,
123
gpgme_pubkey_algo_name(),
124
gpgme_data_seek(),
125
gpgme_data_read(),
126
gpgme_data_release()
96
#include <gpgme.h> /* All GPGME types, constants and
97
functions:
98
gpgme_*
127
99
GPGME_PROTOCOL_OpenPGP,
128
GPG_ERR_NO_ERROR,
129
GPG_ERR_NO_SECKEY, */
100
GPG_ERR_NO_* */
130
101
131
102
#define BUFFER_SIZE 256
132
103
104
/*
105
#define PATHDIR "/conf/conf.d/mandos"
106
*/
107
108
#define PATHDIR "/conf/conf.d/mandos"
109
#define SECKEY "seckey.txt"
110
#define PUBKEY "pubkey.txt"
111
133
112
bool debug = false;
134
static const char *keydir = "/conf/conf.d/mandos";
135
113
static const char mandos_protocol_version[] = "1";
136
const char *argp_program_version = "mandosclient 0.9";
114
const char *argp_program_version = "mandos-client 1.0";
137
115
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
138
116
139
117
/* Used for passing in values through the Avahi callback functions */
144
122
unsigned int dh_bits;
145
123
gnutls_dh_params_t dh_params;
146
124
const char *priority;
125
gpgme_ctx_t ctx;
147
126
} mandos_context;
148
127
149
128
/*
164
143
}
165
144
166
145
/*
167
* Decrypt OpenPGP data using keyrings in HOMEDIR.
168
* Returns -1 on error
146
* Initialize GPGME.
169
147
*/
170
static ssize_t pgp_packet_decrypt (const char *cryptotext,
171
size_t crypto_size,
172
char **plaintext,
173
const char *homedir){
174
gpgme_data_t dh_crypto, dh_plain;
175
gpgme_ctx_t ctx;
148
static bool init_gpgme(mandos_context *mc, const char *seckey,
149
const char *pubkey, const char *tempdir){
150
int ret;
176
151
gpgme_error_t rc;
177
ssize_t ret;
178
size_t plaintext_capacity = 0;
179
ssize_t plaintext_length = 0;
180
152
gpgme_engine_info_t engine_info;
181
153
154
155
/*
156
* Helper function to insert pub and seckey to the enigne keyring.
157
*/
158
bool import_key(const char *filename){
159
int fd;
160
gpgme_data_t pgp_data;
161
162
fd = TEMP_FAILURE_RETRY(open(filename, O_RDONLY));
163
if(fd == -1){
164
perror("open");
165
return false;
166
}
167
168
rc = gpgme_data_new_from_fd(&pgp_data, fd);
169
if (rc != GPG_ERR_NO_ERROR){
170
fprintf(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
171
gpgme_strsource(rc), gpgme_strerror(rc));
172
return false;
173
}
174
175
rc = gpgme_op_import(mc->ctx, pgp_data);
176
if (rc != GPG_ERR_NO_ERROR){
177
fprintf(stderr, "bad gpgme_op_import: %s: %s\n",
178
gpgme_strsource(rc), gpgme_strerror(rc));
179
return false;
180
}
181
182
ret = TEMP_FAILURE_RETRY(close(fd));
183
if(ret == -1){
184
perror("close");
185
}
186
gpgme_data_release(pgp_data);
187
return true;
188
}
189
182
190
if (debug){
183
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
191
fprintf(stderr, "Initialize gpgme\n");
184
192
}
185
193
186
194
/* Init GPGME */
189
197
if (rc != GPG_ERR_NO_ERROR){
190
198
fprintf(stderr, "bad gpgme_engine_check_version: %s: %s\n",
191
199
gpgme_strsource(rc), gpgme_strerror(rc));
192
return -1;
200
return false;
193
201
}
194
202
195
/* Set GPGME home directory for the OpenPGP engine only */
203
/* Set GPGME home directory for the OpenPGP engine only */
196
204
rc = gpgme_get_engine_info (&engine_info);
197
205
if (rc != GPG_ERR_NO_ERROR){
198
206
fprintf(stderr, "bad gpgme_get_engine_info: %s: %s\n",
199
207
gpgme_strsource(rc), gpgme_strerror(rc));
200
return -1;
208
return false;
201
209
}
202
210
while(engine_info != NULL){
203
211
if(engine_info->protocol == GPGME_PROTOCOL_OpenPGP){
204
212
gpgme_set_engine_info(GPGME_PROTOCOL_OpenPGP,
205
engine_info->file_name, homedir);
213
engine_info->file_name, tempdir);
206
214
break;
207
215
}
208
216
engine_info = engine_info->next;
209
217
}
210
218
if(engine_info == NULL){
211
fprintf(stderr, "Could not set GPGME home dir to %s\n", homedir);
212
return -1;
219
fprintf(stderr, "Could not set GPGME home dir to %s\n", tempdir);
220
return false;
221
}
222
223
/* Create new GPGME "context" */
224
rc = gpgme_new(&(mc->ctx));
225
if (rc != GPG_ERR_NO_ERROR){
226
fprintf(stderr, "bad gpgme_new: %s: %s\n",
227
gpgme_strsource(rc), gpgme_strerror(rc));
228
return false;
229
}
230
231
if (not import_key(pubkey) or not import_key(seckey)){
232
return false;
233
}
234
235
return true;
236
}
237
238
/*
239
* Decrypt OpenPGP data.
240
* Returns -1 on error
241
*/
242
static ssize_t pgp_packet_decrypt (const mandos_context *mc,
243
const char *cryptotext,
244
size_t crypto_size,
245
char **plaintext){
246
gpgme_data_t dh_crypto, dh_plain;
247
gpgme_error_t rc;
248
ssize_t ret;
249
size_t plaintext_capacity = 0;
250
ssize_t plaintext_length = 0;
251
252
if (debug){
253
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
213
254
}
214
255
215
256
/* Create new GPGME data buffer from memory cryptotext */
230
271
return -1;
231
272
}
232
273
233
/* Create new GPGME "context" */
234
rc = gpgme_new(&ctx);
235
if (rc != GPG_ERR_NO_ERROR){
236
fprintf(stderr, "bad gpgme_new: %s: %s\n",
237
gpgme_strsource(rc), gpgme_strerror(rc));
238
plaintext_length = -1;
239
goto decrypt_end;
240
}
241
242
274
/* Decrypt data from the cryptotext data buffer to the plaintext
243
275
data buffer */
244
rc = gpgme_op_decrypt(ctx, dh_crypto, dh_plain);
276
rc = gpgme_op_decrypt(mc->ctx, dh_crypto, dh_plain);
245
277
if (rc != GPG_ERR_NO_ERROR){
246
278
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
247
279
gpgme_strsource(rc), gpgme_strerror(rc));
248
280
plaintext_length = -1;
281
if (debug){
282
gpgme_decrypt_result_t result;
283
result = gpgme_op_decrypt_result(mc->ctx);
284
if (result == NULL){
285
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
286
} else {
287
fprintf(stderr, "Unsupported algorithm: %s\n",
288
result->unsupported_algorithm);
289
fprintf(stderr, "Wrong key usage: %u\n",
290
result->wrong_key_usage);
291
if(result->file_name != NULL){
292
fprintf(stderr, "File name: %s\n", result->file_name);
293
}
294
gpgme_recipient_t recipient;
295
recipient = result->recipients;
296
if(recipient){
297
while(recipient != NULL){
298
fprintf(stderr, "Public key algorithm: %s\n",
299
gpgme_pubkey_algo_name(recipient->pubkey_algo));
300
fprintf(stderr, "Key ID: %s\n", recipient->keyid);
301
fprintf(stderr, "Secret key available: %s\n",
302
recipient->status == GPG_ERR_NO_SECKEY
303
? "No" : "Yes");
304
recipient = recipient->next;
305
}
306
}
307
}
308
}
249
309
goto decrypt_end;
250
310
}
251
311
253
313
fprintf(stderr, "Decryption of OpenPGP data succeeded\n");
254
314
}
255
315
256
if (debug){
257
gpgme_decrypt_result_t result;
258
result = gpgme_op_decrypt_result(ctx);
259
if (result == NULL){
260
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
261
} else {
262
fprintf(stderr, "Unsupported algorithm: %s\n",
263
result->unsupported_algorithm);
264
fprintf(stderr, "Wrong key usage: %d\n",
265
result->wrong_key_usage);
266
if(result->file_name != NULL){
267
fprintf(stderr, "File name: %s\n", result->file_name);
268
}
269
gpgme_recipient_t recipient;
270
recipient = result->recipients;
271
if(recipient){
272
while(recipient != NULL){
273
fprintf(stderr, "Public key algorithm: %s\n",
274
gpgme_pubkey_algo_name(recipient->pubkey_algo));
275
fprintf(stderr, "Key ID: %s\n", recipient->keyid);
276
fprintf(stderr, "Secret key available: %s\n",
277
recipient->status == GPG_ERR_NO_SECKEY
278
? "No" : "Yes");
279
recipient = recipient->next;
280
}
281
}
282
}
283
}
284
285
316
/* Seek back to the beginning of the GPGME plaintext data buffer */
286
317
if (gpgme_data_seek(dh_plain, (off_t) 0, SEEK_SET) == -1){
287
318
perror("pgpme_data_seek");
314
345
}
315
346
plaintext_length += ret;
316
347
}
317
348
318
349
if(debug){
319
350
fprintf(stderr, "Decrypted password is: ");
320
351
for(ssize_t i = 0; i < plaintext_length; i++){
334
365
}
335
366
336
367
static const char * safer_gnutls_strerror (int value) {
337
const char *ret = gnutls_strerror (value);
368
const char *ret = gnutls_strerror (value); /* Spurious warning */
338
369
if (ret == NULL)
339
370
ret = "(unknown)";
340
371
return ret;
347
378
}
348
379
349
380
static int init_gnutls_global(mandos_context *mc,
350
const char *pubkeyfile,
351
const char *seckeyfile){
381
const char *pubkeyfilename,
382
const char *seckeyfilename){
352
383
int ret;
353
384
354
385
if(debug){
355
386
fprintf(stderr, "Initializing GnuTLS\n");
356
387
}
357
358
if ((ret = gnutls_global_init ())
359
!= GNUTLS_E_SUCCESS) {
388
389
ret = gnutls_global_init();
390
if (ret != GNUTLS_E_SUCCESS) {
360
391
fprintf (stderr, "GnuTLS global_init: %s\n",
361
392
safer_gnutls_strerror(ret));
362
393
return -1;
371
402
}
372
403
373
404
/* OpenPGP credentials */
374
if ((ret = gnutls_certificate_allocate_credentials (&mc->cred))
375
!= GNUTLS_E_SUCCESS) {
376
fprintf (stderr, "GnuTLS memory error: %s\n",
405
gnutls_certificate_allocate_credentials(&mc->cred);
406
if (ret != GNUTLS_E_SUCCESS){
407
fprintf (stderr, "GnuTLS memory error: %s\n", /* Spurious
408
warning */
377
409
safer_gnutls_strerror(ret));
378
410
gnutls_global_deinit ();
379
411
return -1;
380
412
}
381
413
382
414
if(debug){
383
fprintf(stderr, "Attempting to use OpenPGP certificate %s"
384
" and keyfile %s as GnuTLS credentials\n", pubkeyfile,
385
seckeyfile);
415
fprintf(stderr, "Attempting to use OpenPGP public key %s and"
416
" secret key %s as GnuTLS credentials\n", pubkeyfilename,
417
seckeyfilename);
386
418
}
387
419
388
420
ret = gnutls_certificate_set_openpgp_key_file
389
(mc->cred, pubkeyfile, seckeyfile, GNUTLS_OPENPGP_FMT_BASE64);
421
(mc->cred, pubkeyfilename, seckeyfilename,
422
GNUTLS_OPENPGP_FMT_BASE64);
390
423
if (ret != GNUTLS_E_SUCCESS) {
391
424
fprintf(stderr,
392
425
"Error[%d] while reading the OpenPGP key pair ('%s',"
393
" '%s')\n", ret, pubkeyfile, seckeyfile);
394
fprintf(stdout, "The GnuTLS error is: %s\n",
426
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
427
fprintf(stderr, "The GnuTLS error is: %s\n",
395
428
safer_gnutls_strerror(ret));
396
429
goto globalfail;
397
430
}
411
444
}
412
445
413
446
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
414
447
415
448
return 0;
416
449
417
450
globalfail:
418
451
419
452
gnutls_certificate_free_credentials(mc->cred);
420
453
gnutls_global_deinit();
421
454
return -1;
422
423
455
}
424
456
425
457
static int init_gnutls_session(mandos_context *mc,
488
520
}
489
521
490
522
if(debug){
491
fprintf(stderr, "Setting up a tcp connection to %s, port %d\n",
492
ip, port);
523
fprintf(stderr, "Setting up a tcp connection to %s, port %" PRIu16
524
"\n", ip, port);
493
525
}
494
526
495
527
tcp_sd = socket(PF_INET6, SOCK_STREAM, 0);
497
529
perror("socket");
498
530
return -1;
499
531
}
500
532
501
533
if(debug){
502
534
if(if_indextoname((unsigned int)if_index, interface) == NULL){
503
535
perror("if_indextoname");
506
538
fprintf(stderr, "Binding to interface %s\n", interface);
507
539
}
508
540
509
memset(&to,0,sizeof(to)); /* Spurious warning */
541
memset(&to, 0, sizeof(to));
510
542
to.in6.sin6_family = AF_INET6;
511
543
/* It would be nice to have a way to detect if we were passed an
512
544
IPv4 address here. Now we assume an IPv6 address. */
519
551
fprintf(stderr, "Bad address: %s\n", ip);
520
552
return -1;
521
553
}
522
to.in6.sin6_port = htons(port); /* Spurious warning */
554
to.in6.sin6_port = htons(port); /* Spurious warning */
523
555
524
556
to.in6.sin6_scope_id = (uint32_t)if_index;
525
557
526
558
if(debug){
527
fprintf(stderr, "Connection to: %s, port %d\n", ip, port);
559
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
560
port);
528
561
char addrstr[INET6_ADDRSTRLEN] = "";
529
562
if(inet_ntop(to.in6.sin6_family, &(to.in6.sin6_addr), addrstr,
530
563
sizeof(addrstr)) == NULL){
541
574
perror("connect");
542
575
return -1;
543
576
}
544
577
545
578
const char *out = mandos_protocol_version;
546
579
written = 0;
547
580
while (true){
565
598
}
566
599
}
567
600
}
568
601
569
602
if(debug){
570
603
fprintf(stderr, "Establishing TLS session with %s\n", ip);
571
604
}
572
605
573
606
gnutls_transport_set_ptr (session, (gnutls_transport_ptr_t) tcp_sd);
574
607
575
ret = gnutls_handshake (session);
608
do{
609
ret = gnutls_handshake (session);
610
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
576
611
577
612
if (ret != GNUTLS_E_SUCCESS){
578
613
if(debug){
589
624
fprintf(stderr, "Retrieving pgp encrypted password from %s\n",
590
625
ip);
591
626
}
592
627
593
628
while(true){
594
629
buffer_capacity = adjustbuffer(&buffer, buffer_length,
595
630
buffer_capacity);
610
645
case GNUTLS_E_AGAIN:
611
646
break;
612
647
case GNUTLS_E_REHANDSHAKE:
613
ret = gnutls_handshake (session);
648
do{
649
ret = gnutls_handshake (session);
650
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
614
651
if (ret < 0){
615
652
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
616
653
gnutls_perror (ret);
637
674
gnutls_bye (session, GNUTLS_SHUT_RDWR);
638
675
639
676
if (buffer_length > 0){
640
decrypted_buffer_size = pgp_packet_decrypt(buffer,
677
decrypted_buffer_size = pgp_packet_decrypt(mc, buffer,
641
678
buffer_length,
642
&decrypted_buffer,
643
keydir);
679
&decrypted_buffer);
644
680
if (decrypted_buffer_size >= 0){
645
681
written = 0;
646
682
while(written < (size_t) decrypted_buffer_size){
661
697
} else {
662
698
retval = -1;
663
699
}
700
} else {
701
retval = -1;
664
702
}
665
703
666
704
/* Shutdown procedure */
667
705
668
706
mandos_end:
669
707
free(buffer);
670
close(tcp_sd);
708
ret = TEMP_FAILURE_RETRY(close(tcp_sd));
709
if(ret == -1){
710
perror("close");
711
}
671
712
gnutls_deinit (session);
672
713
return retval;
673
714
}
687
728
flags,
688
729
void* userdata) {
689
730
mandos_context *mc = userdata;
690
assert(r); /* Spurious warning */
731
assert(r);
691
732
692
733
/* Called whenever a service has been resolved successfully or
693
734
timed out */
705
746
char ip[AVAHI_ADDRESS_STR_MAX];
706
747
avahi_address_snprint(ip, sizeof(ip), address);
707
748
if(debug){
708
fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %d) on"
709
" port %d\n", name, host_name, ip, interface, port);
749
fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %"
750
PRIu16 ") on port %d\n", name, host_name, ip,
751
interface, port);
710
752
}
711
753
int ret = start_mandos_communication(ip, port, interface, mc);
712
754
if (ret == 0){
713
exit(EXIT_SUCCESS);
755
avahi_simple_poll_quit(mc->simple_poll);
714
756
}
715
757
}
716
758
}
728
770
flags,
729
771
void* userdata) {
730
772
mandos_context *mc = userdata;
731
assert(b); /* Spurious warning */
773
assert(b);
732
774
733
775
/* Called whenever a new services becomes available on the LAN or
734
776
is removed from the LAN */
768
810
}
769
811
}
770
812
771
/* Combines file name and path and returns the malloced new
772
string. some sane checks could/should be added */
773
static const char *combinepath(const char *first, const char *second){
774
size_t f_len = strlen(first);
775
size_t s_len = strlen(second);
776
char *tmp = malloc(f_len + s_len + 2);
777
if (tmp == NULL){
778
return NULL;
779
}
780
if(f_len > 0){
781
memcpy(tmp, first, f_len); /* Spurious warning */
782
}
783
tmp[f_len] = '/';
784
if(s_len > 0){
785
memcpy(tmp + f_len + 1, second, s_len); /* Spurious warning */
786
}
787
tmp[f_len + 1 + s_len] = '\0';
788
return tmp;
789
}
790
791
792
813
int main(int argc, char *argv[]){
793
814
AvahiSServiceBrowser *sb = NULL;
794
815
int error;
800
821
uid_t uid;
801
822
gid_t gid;
802
823
char *connect_to = NULL;
824
char tempdir[] = "/tmp/mandosXXXXXX";
803
825
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
804
const char *pubkeyfile = "pubkey.txt";
805
const char *seckeyfile = "seckey.txt";
826
const char *seckey = PATHDIR "/" SECKEY;
827
const char *pubkey = PATHDIR "/" PUBKEY;
828
806
829
mandos_context mc = { .simple_poll = NULL, .server = NULL,
807
.dh_bits = 1024, .priority = "SECURE256"};
830
.dh_bits = 1024, .priority = "SECURE256"
831
":!CTYPE-X.509:+CTYPE-OPENPGP" };
808
832
bool gnutls_initalized = false;
833
bool pgpme_initalized = false;
809
834
810
835
{
811
836
struct argp_option options[] = {
812
837
{ .name = "debug", .key = 128,
813
838
.doc = "Debug mode", .group = 3 },
814
839
{ .name = "connect", .key = 'c',
815
.arg = "IP",
816
.doc = "Connect directly to a sepcified mandos server",
840
.arg = "ADDRESS:PORT",
841
.doc = "Connect directly to a specific Mandos server",
817
842
.group = 1 },
818
843
{ .name = "interface", .key = 'i',
819
.arg = "INTERFACE",
820
.doc = "Interface that Avahi will conntect through",
821
.group = 1 },
822
{ .name = "keydir", .key = 'd',
823
.arg = "KEYDIR",
824
.doc = "Directory where the openpgp keyring is",
844
.arg = "NAME",
845
.doc = "Interface that will be used to search for Mandos"
846
" servers",
825
847
.group = 1 },
826
848
{ .name = "seckey", .key = 's',
827
.arg = "SECKEY",
828
.doc = "Secret openpgp key for gnutls authentication",
849
.arg = "FILE",
850
.doc = "OpenPGP secret key file base name",
829
851
.group = 1 },
830
852
{ .name = "pubkey", .key = 'p',
831
.arg = "PUBKEY",
832
.doc = "Public openpgp key for gnutls authentication",
853
.arg = "FILE",
854
.doc = "OpenPGP public key file base name",
833
855
.group = 2 },
834
856
{ .name = "dh-bits", .key = 129,
835
857
.arg = "BITS",
836
.doc = "dh-bits to use in gnutls communication",
858
.doc = "Bit length of the prime number used in the"
859
" Diffie-Hellman key exchange",
837
860
.group = 2 },
838
861
{ .name = "priority", .key = 130,
839
.arg = "PRIORITY",
840
.doc = "GNUTLS priority", .group = 1 },
862
.arg = "STRING",
863
.doc = "GnuTLS priority string for the TLS handshake",
864
.group = 1 },
841
865
{ .name = NULL }
842
866
};
843
844
867
845
868
error_t parse_opt (int key, char *arg,
846
869
struct argp_state *state) {
847
870
/* Get the INPUT argument from `argp_parse', which we know is
848
871
a pointer to our plugin list pointer. */
849
872
switch (key) {
850
case 128:
873
case 128: /* --debug */
851
874
debug = true;
852
875
break;
853
case 'c':
876
case 'c': /* --connect */
854
877
connect_to = arg;
855
878
break;
856
case 'i':
879
case 'i': /* --interface */
857
880
interface = arg;
858
881
break;
859
case 'd':
860
keydir = arg;
861
break;
862
case 's':
863
seckeyfile = arg;
864
break;
865
case 'p':
866
pubkeyfile = arg;
867
break;
868
case 129:
882
case 's': /* --seckey */
883
seckey = arg;
884
break;
885
case 'p': /* --pubkey */
886
pubkey = arg;
887
break;
888
case 129: /* --dh-bits */
869
889
errno = 0;
870
890
mc.dh_bits = (unsigned int) strtol(arg, NULL, 10);
871
891
if (errno){
873
893
exit(EXIT_FAILURE);
874
894
}
875
895
break;
876
case 130:
896
case 130: /* --priority */
877
897
mc.priority = arg;
878
898
break;
879
899
case ARGP_KEY_ARG:
880
900
argp_usage (state);
901
case ARGP_KEY_END:
881
902
break;
882
case ARGP_KEY_END:
883
break;
884
903
default:
885
904
return ARGP_ERR_UNKNOWN;
886
905
}
887
906
return 0;
888
907
}
889
908
890
909
struct argp argp = { .options = options, .parser = parse_opt,
891
910
.args_doc = "",
892
911
.doc = "Mandos client -- Get and decrypt"
893
" passwords from mandos server" };
894
argp_parse (&argp, argc, argv, 0, 0, NULL);
895
}
896
897
pubkeyfile = combinepath(keydir, pubkeyfile);
898
if (pubkeyfile == NULL){
899
perror("combinepath");
900
exitcode = EXIT_FAILURE;
901
goto end;
902
}
903
904
seckeyfile = combinepath(keydir, seckeyfile);
905
if (seckeyfile == NULL){
906
perror("combinepath");
907
goto end;
908
}
909
910
ret = init_gnutls_global(&mc, pubkeyfile, seckeyfile);
911
if (ret == -1){
912
fprintf(stderr, "init_gnutls_global\n");
913
goto end;
914
} else {
915
gnutls_initalized = true;
916
}
917
912
" passwords from a Mandos server" };
913
ret = argp_parse (&argp, argc, argv, 0, 0, NULL);
914
if (ret == ARGP_ERR_UNKNOWN){
915
fprintf(stderr, "Unknown error while parsing arguments\n");
916
exitcode = EXIT_FAILURE;
917
goto end;
918
}
919
}
920
921
/* If the interface is down, bring it up */
922
{
923
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
924
if(sd < 0) {
925
perror("socket");
926
exitcode = EXIT_FAILURE;
927
goto end;
928
}
929
strcpy(network.ifr_name, interface);
930
ret = ioctl(sd, SIOCGIFFLAGS, &network);
931
if(ret == -1){
932
perror("ioctl SIOCGIFFLAGS");
933
exitcode = EXIT_FAILURE;
934
goto end;
935
}
936
if((network.ifr_flags & IFF_UP) == 0){
937
network.ifr_flags |= IFF_UP;
938
ret = ioctl(sd, SIOCSIFFLAGS, &network);
939
if(ret == -1){
940
perror("ioctl SIOCSIFFLAGS");
941
exitcode = EXIT_FAILURE;
942
goto end;
943
}
944
}
945
ret = TEMP_FAILURE_RETRY(close(sd));
946
if(ret == -1){
947
perror("close");
948
}
949
}
950
918
951
uid = getuid();
919
952
gid = getgid();
920
953
921
954
ret = setuid(uid);
922
955
if (ret == -1){
923
956
perror("setuid");
928
961
perror("setgid");
929
962
}
930
963
964
ret = init_gnutls_global(&mc, pubkey, seckey);
965
if (ret == -1){
966
fprintf(stderr, "init_gnutls_global failed\n");
967
exitcode = EXIT_FAILURE;
968
goto end;
969
} else {
970
gnutls_initalized = true;
971
}
972
973
if(mkdtemp(tempdir) == NULL){
974
perror("mkdtemp");
975
tempdir[0] = '\0';
976
goto end;
977
}
978
979
if(not init_gpgme(&mc, pubkey, seckey, tempdir)){
980
fprintf(stderr, "pgpme_initalized failed\n");
981
exitcode = EXIT_FAILURE;
982
goto end;
983
} else {
984
pgpme_initalized = true;
985
}
986
931
987
if_index = (AvahiIfIndex) if_nametoindex(interface);
932
988
if(if_index == 0){
933
989
fprintf(stderr, "No such interface: \"%s\"\n", interface);
961
1017
goto end;
962
1018
}
963
1019
964
/* If the interface is down, bring it up */
965
{
966
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
967
if(sd < 0) {
968
perror("socket");
969
exitcode = EXIT_FAILURE;
970
goto end;
971
}
972
strcpy(network.ifr_name, interface); /* Spurious warning */
973
ret = ioctl(sd, SIOCGIFFLAGS, &network);
974
if(ret == -1){
975
perror("ioctl SIOCGIFFLAGS");
976
exitcode = EXIT_FAILURE;
977
goto end;
978
}
979
if((network.ifr_flags & IFF_UP) == 0){
980
network.ifr_flags |= IFF_UP;
981
ret = ioctl(sd, SIOCSIFFLAGS, &network);
982
if(ret == -1){
983
perror("ioctl SIOCSIFFLAGS");
984
exitcode = EXIT_FAILURE;
985
goto end;
986
}
987
}
988
close(sd);
989
}
990
991
1020
if (not debug){
992
1021
avahi_set_log_function(empty_log);
993
1022
}
1003
1032
exitcode = EXIT_FAILURE;
1004
1033
goto end;
1005
1034
}
1006
1035
1007
1036
{
1008
1037
AvahiServerConfig config;
1009
1038
/* Do not publish any local Zeroconf records */
1012
1041
config.publish_addresses = 0;
1013
1042
config.publish_workstation = 0;
1014
1043
config.publish_domain = 0;
1015
1044
1016
1045
/* Allocate a new server */
1017
1046
mc.server = avahi_server_new(avahi_simple_poll_get
1018
1047
(mc.simple_poll), &config, NULL,
1019
1048
NULL, &error);
1020
1049
1021
1050
/* Free the Avahi configuration data */
1022
1051
avahi_server_config_free(&config);
1023
1052
}
1043
1072
}
1044
1073
1045
1074
/* Run the main loop */
1046
1075
1047
1076
if (debug){
1048
1077
fprintf(stderr, "Starting Avahi loop search\n");
1049
1078
}
1051
1080
avahi_simple_poll_loop(mc.simple_poll);
1052
1081
1053
1082
end:
1054
1083
1055
1084
if (debug){
1056
1085
fprintf(stderr, "%s exiting\n", argv[0]);
1057
1086
}
1062
1091
1063
1092
if (mc.server != NULL)
1064
1093
avahi_server_free(mc.server);
1065
1094
1066
1095
if (mc.simple_poll != NULL)
1067
1096
avahi_simple_poll_free(mc.simple_poll);
1068
free(pubkeyfile);
1069
free(seckeyfile);
1070
1097
1071
1098
if (gnutls_initalized){
1072
gnutls_certificate_free_credentials (mc.cred);
1099
gnutls_certificate_free_credentials(mc.cred);
1073
1100
gnutls_global_deinit ();
1074
1101
}
1075
1102
1103
if(pgpme_initalized){
1104
gpgme_release(mc.ctx);
1105
}
1106
1107
/* Removes the temp directory used by GPGME */
1108
if(tempdir[0] != '\0'){
1109
DIR *d;
1110
struct dirent *direntry;
1111
d = opendir(tempdir);
1112
if(d == NULL){
1113
perror("opendir");
1114
} else {
1115
while(true){
1116
direntry = readdir(d);
1117
if(direntry == NULL){
1118
break;
1119
}
1120
if (direntry->d_type == DT_REG){
1121
char *fullname = NULL;
1122
ret = asprintf(&fullname, "%s/%s", tempdir,
1123
direntry->d_name);
1124
if(ret < 0){
1125
perror("asprintf");
1126
continue;
1127
}
1128
ret = unlink(fullname);
1129
if(ret == -1){
1130
fprintf(stderr, "unlink(\"%s\"): %s",
1131
fullname, strerror(errno));
1132
}
1133
free(fullname);
1134
}
1135
}
1136
}
1137
ret = rmdir(tempdir);
1138
if(ret == -1){
1139
perror("rmdir");
1140
}
1141
}
1142
1076
1143
return exitcode;
1077
1144
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0