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- Committer: Teddy Hogeborn
- Date: 2008-08-09 01:39:09 UTC
- Revision ID: teddy@fukt.bsnet.se-20080809013909-n3i3ll1voycmmw7l
* clients.conf: Better comments.
(foo): Commented out and changed into a better example client.
(braxen_client): Removed.
(bar): New commented-out example client.
* mandos: Changed all log messages to be unicode strings.
(Client.fqdn): Renamed to "host". All users and documentation
changed.
(main): Exit immediately if no clients are defined.
* mandos.conf: Better comments.
(foo): Commented out and changed into a better example client.
(braxen_client): Removed.
(bar): New commented-out example client.
* mandos: Changed all log messages to be unicode strings.
(Client.fqdn): Renamed to "host". All users and documentation
changed.
(main): Exit immediately if no clients are defined.
* mandos.conf: Better comments.
- files added:
- network-protocol.txt
- files removed:
- .bzrignore
- files renamed:
- plugin-runner.c => mandos-client.c
- plugin-runner.xml => mandos-client.xml
- plugins.d/mandos-client.c => plugins.d/password-request.c
- plugins.d/mandos-client.xml => plugins.d/password-request.xml
- files modified:
- Makefile
added
removed
plugins.d/password-request.c
32
32
#define _LARGEFILE_SOURCE
33
33
#define _FILE_OFFSET_BITS 64
34
34
35
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), asprintf() */
35
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY() */
36
36
37
#include <stdio.h> /* fprintf(), stderr, fwrite(),
38
stdout, ferror() */
39
#include <stdint.h> /* uint16_t, uint32_t */
40
#include <stddef.h> /* NULL, size_t, ssize_t */
41
#include <stdlib.h> /* free(), EXIT_SUCCESS, EXIT_FAILURE,
42
srand() */
43
#include <stdbool.h> /* bool, true */
44
#include <string.h> /* memset(), strcmp(), strlen(),
45
strerror(), asprintf(), strcpy() */
46
#include <sys/ioctl.h> /* ioctl */
47
#include <sys/types.h> /* socket(), inet_pton(), sockaddr,
48
sockaddr_in6, PF_INET6,
49
SOCK_STREAM, INET6_ADDRSTRLEN,
50
uid_t, gid_t, open(), opendir(), DIR */
51
#include <sys/stat.h> /* open() */
52
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
53
struct in6_addr, inet_pton(),
54
connect() */
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() */
37
#include <stdio.h>
38
#include <assert.h>
39
#include <stdlib.h>
40
#include <time.h>
41
#include <net/if.h> /* if_nametoindex */
42
#include <sys/ioctl.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
43
SIOCSIFFLAGS */
61
44
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
62
SIOCSIFFLAGS, if_indextoname(),
63
if_nametoindex(), IF_NAMESIZE */
64
#include <netinet/in.h>
65
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
66
getuid(), getgid(), setuid(),
67
setgid() */
68
#include <arpa/inet.h> /* inet_pton(), htons */
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 */
45
SIOCSIFFLAGS */
74
46
75
/* Avahi */
76
/* All Avahi types, constants and functions
77
Avahi*, avahi_*,
78
AVAHI_* */
79
47
#include <avahi-core/core.h>
80
48
#include <avahi-core/lookup.h>
81
49
#include <avahi-core/log.h>
83
51
#include <avahi-common/malloc.h>
84
52
#include <avahi-common/error.h>
85
53
86
/* GnuTLS */
87
#include <gnutls/gnutls.h> /* All GnuTLS types, constants and
88
functions:
89
gnutls_*
90
init_gnutls_session(),
91
GNUTLS_* */
92
#include <gnutls/openpgp.h> /* gnutls_certificate_set_openpgp_key_file(),
93
GNUTLS_OPENPGP_FMT_BASE64 */
54
/* Mandos client part */
55
#include <sys/types.h> /* socket(), inet_pton() */
56
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
57
struct in6_addr, inet_pton() */
58
#include <gnutls/gnutls.h> /* All GnuTLS stuff */
59
#include <gnutls/openpgp.h> /* GnuTLS with openpgp stuff */
94
60
61
#include <unistd.h> /* close() */
62
#include <netinet/in.h>
63
#include <stdbool.h> /* true */
64
#include <string.h> /* memset */
65
#include <arpa/inet.h> /* inet_pton() */
66
#include <iso646.h> /* not */
67
#include <net/if.h> /* IF_NAMESIZE */
68
#include <argp.h> /* struct argp_option,
69
struct argp_state, struct argp,
70
argp_parse() */
95
71
/* GPGME */
96
#include <gpgme.h> /* All GPGME types, constants and
97
functions:
98
gpgme_*
99
GPGME_PROTOCOL_OpenPGP,
100
GPG_ERR_NO_* */
72
#include <errno.h> /* perror() */
73
#include <gpgme.h>
101
74
102
75
#define BUFFER_SIZE 256
103
76
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
112
77
bool debug = false;
78
static const char *keydir = "/conf/conf.d/mandos";
113
79
static const char mandos_protocol_version[] = "1";
114
const char *argp_program_version = "mandos-client 1.0";
80
const char *argp_program_version = "mandosclient 0.9";
115
81
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
116
82
117
83
/* Used for passing in values through the Avahi callback functions */
122
88
unsigned int dh_bits;
123
89
gnutls_dh_params_t dh_params;
124
90
const char *priority;
125
gpgme_ctx_t ctx;
126
91
} mandos_context;
127
92
128
93
/*
143
108
}
144
109
145
110
/*
146
* Initialize GPGME.
111
* Decrypt OpenPGP data using keyrings in HOMEDIR.
112
* Returns -1 on error
147
113
*/
148
static bool init_gpgme(mandos_context *mc, const char *seckey,
149
const char *pubkey, const char *tempdir){
150
int ret;
114
static ssize_t pgp_packet_decrypt (const char *cryptotext,
115
size_t crypto_size,
116
char **plaintext,
117
const char *homedir){
118
gpgme_data_t dh_crypto, dh_plain;
119
gpgme_ctx_t ctx;
151
120
gpgme_error_t rc;
121
ssize_t ret;
122
size_t plaintext_capacity = 0;
123
ssize_t plaintext_length = 0;
152
124
gpgme_engine_info_t engine_info;
153
125
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
190
126
if (debug){
191
fprintf(stderr, "Initialize gpgme\n");
127
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
192
128
}
193
129
194
130
/* Init GPGME */
197
133
if (rc != GPG_ERR_NO_ERROR){
198
134
fprintf(stderr, "bad gpgme_engine_check_version: %s: %s\n",
199
135
gpgme_strsource(rc), gpgme_strerror(rc));
200
return false;
136
return -1;
201
137
}
202
138
203
/* Set GPGME home directory for the OpenPGP engine only */
139
/* Set GPGME home directory for the OpenPGP engine only */
204
140
rc = gpgme_get_engine_info (&engine_info);
205
141
if (rc != GPG_ERR_NO_ERROR){
206
142
fprintf(stderr, "bad gpgme_get_engine_info: %s: %s\n",
207
143
gpgme_strsource(rc), gpgme_strerror(rc));
208
return false;
144
return -1;
209
145
}
210
146
while(engine_info != NULL){
211
147
if(engine_info->protocol == GPGME_PROTOCOL_OpenPGP){
212
148
gpgme_set_engine_info(GPGME_PROTOCOL_OpenPGP,
213
engine_info->file_name, tempdir);
149
engine_info->file_name, homedir);
214
150
break;
215
151
}
216
152
engine_info = engine_info->next;
217
153
}
218
154
if(engine_info == NULL){
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");
155
fprintf(stderr, "Could not set GPGME home dir to %s\n", homedir);
156
return -1;
254
157
}
255
158
256
159
/* Create new GPGME data buffer from memory cryptotext */
271
174
return -1;
272
175
}
273
176
177
/* Create new GPGME "context" */
178
rc = gpgme_new(&ctx);
179
if (rc != GPG_ERR_NO_ERROR){
180
fprintf(stderr, "bad gpgme_new: %s: %s\n",
181
gpgme_strsource(rc), gpgme_strerror(rc));
182
plaintext_length = -1;
183
goto decrypt_end;
184
}
185
274
186
/* Decrypt data from the cryptotext data buffer to the plaintext
275
187
data buffer */
276
rc = gpgme_op_decrypt(mc->ctx, dh_crypto, dh_plain);
188
rc = gpgme_op_decrypt(ctx, dh_crypto, dh_plain);
277
189
if (rc != GPG_ERR_NO_ERROR){
278
190
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
279
191
gpgme_strsource(rc), gpgme_strerror(rc));
280
192
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
}
309
193
goto decrypt_end;
310
194
}
311
195
313
197
fprintf(stderr, "Decryption of OpenPGP data succeeded\n");
314
198
}
315
199
200
if (debug){
201
gpgme_decrypt_result_t result;
202
result = gpgme_op_decrypt_result(ctx);
203
if (result == NULL){
204
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
205
} else {
206
fprintf(stderr, "Unsupported algorithm: %s\n",
207
result->unsupported_algorithm);
208
fprintf(stderr, "Wrong key usage: %d\n",
209
result->wrong_key_usage);
210
if(result->file_name != NULL){
211
fprintf(stderr, "File name: %s\n", result->file_name);
212
}
213
gpgme_recipient_t recipient;
214
recipient = result->recipients;
215
if(recipient){
216
while(recipient != NULL){
217
fprintf(stderr, "Public key algorithm: %s\n",
218
gpgme_pubkey_algo_name(recipient->pubkey_algo));
219
fprintf(stderr, "Key ID: %s\n", recipient->keyid);
220
fprintf(stderr, "Secret key available: %s\n",
221
recipient->status == GPG_ERR_NO_SECKEY
222
? "No" : "Yes");
223
recipient = recipient->next;
224
}
225
}
226
}
227
}
228
316
229
/* Seek back to the beginning of the GPGME plaintext data buffer */
317
230
if (gpgme_data_seek(dh_plain, (off_t) 0, SEEK_SET) == -1){
318
perror("gpgme_data_seek");
231
perror("pgpme_data_seek");
319
232
plaintext_length = -1;
320
233
goto decrypt_end;
321
234
}
345
258
}
346
259
plaintext_length += ret;
347
260
}
348
261
349
262
if(debug){
350
263
fprintf(stderr, "Decrypted password is: ");
351
264
for(ssize_t i = 0; i < plaintext_length; i++){
365
278
}
366
279
367
280
static const char * safer_gnutls_strerror (int value) {
368
const char *ret = gnutls_strerror (value); /* Spurious warning */
281
const char *ret = gnutls_strerror (value);
369
282
if (ret == NULL)
370
283
ret = "(unknown)";
371
284
return ret;
378
291
}
379
292
380
293
static int init_gnutls_global(mandos_context *mc,
381
const char *pubkeyfilename,
382
const char *seckeyfilename){
294
const char *pubkeyfile,
295
const char *seckeyfile){
383
296
int ret;
384
297
385
298
if(debug){
386
299
fprintf(stderr, "Initializing GnuTLS\n");
387
300
}
388
389
ret = gnutls_global_init();
390
if (ret != GNUTLS_E_SUCCESS) {
301
302
if ((ret = gnutls_global_init ())
303
!= GNUTLS_E_SUCCESS) {
391
304
fprintf (stderr, "GnuTLS global_init: %s\n",
392
305
safer_gnutls_strerror(ret));
393
306
return -1;
402
315
}
403
316
404
317
/* OpenPGP credentials */
405
gnutls_certificate_allocate_credentials(&mc->cred);
406
if (ret != GNUTLS_E_SUCCESS){
407
fprintf (stderr, "GnuTLS memory error: %s\n", /* Spurious
408
warning */
318
if ((ret = gnutls_certificate_allocate_credentials (&mc->cred))
319
!= GNUTLS_E_SUCCESS) {
320
fprintf (stderr, "GnuTLS memory error: %s\n",
409
321
safer_gnutls_strerror(ret));
410
322
gnutls_global_deinit ();
411
323
return -1;
412
324
}
413
325
414
326
if(debug){
415
fprintf(stderr, "Attempting to use OpenPGP public key %s and"
416
" secret key %s as GnuTLS credentials\n", pubkeyfilename,
417
seckeyfilename);
327
fprintf(stderr, "Attempting to use OpenPGP certificate %s"
328
" and keyfile %s as GnuTLS credentials\n", pubkeyfile,
329
seckeyfile);
418
330
}
419
331
420
332
ret = gnutls_certificate_set_openpgp_key_file
421
(mc->cred, pubkeyfilename, seckeyfilename,
422
GNUTLS_OPENPGP_FMT_BASE64);
333
(mc->cred, pubkeyfile, seckeyfile, GNUTLS_OPENPGP_FMT_BASE64);
423
334
if (ret != GNUTLS_E_SUCCESS) {
424
335
fprintf(stderr,
425
336
"Error[%d] while reading the OpenPGP key pair ('%s',"
426
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
427
fprintf(stderr, "The GnuTLS error is: %s\n",
337
" '%s')\n", ret, pubkeyfile, seckeyfile);
338
fprintf(stdout, "The GnuTLS error is: %s\n",
428
339
safer_gnutls_strerror(ret));
429
340
goto globalfail;
430
341
}
444
355
}
445
356
446
357
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
447
358
448
359
return 0;
449
360
450
361
globalfail:
451
452
gnutls_certificate_free_credentials(mc->cred);
453
gnutls_global_deinit();
454
gnutls_dh_params_deinit(mc->dh_params);
362
363
gnutls_certificate_free_credentials (mc->cred);
364
gnutls_global_deinit ();
455
365
return -1;
366
456
367
}
457
368
458
369
static int init_gnutls_session(mandos_context *mc,
521
432
}
522
433
523
434
if(debug){
524
fprintf(stderr, "Setting up a tcp connection to %s, port %" PRIu16
525
"\n", ip, port);
435
fprintf(stderr, "Setting up a tcp connection to %s, port %d\n",
436
ip, port);
526
437
}
527
438
528
439
tcp_sd = socket(PF_INET6, SOCK_STREAM, 0);
530
441
perror("socket");
531
442
return -1;
532
443
}
533
444
534
445
if(debug){
535
446
if(if_indextoname((unsigned int)if_index, interface) == NULL){
536
447
perror("if_indextoname");
539
450
fprintf(stderr, "Binding to interface %s\n", interface);
540
451
}
541
452
542
memset(&to, 0, sizeof(to));
453
memset(&to,0,sizeof(to)); /* Spurious warning */
543
454
to.in6.sin6_family = AF_INET6;
544
455
/* It would be nice to have a way to detect if we were passed an
545
456
IPv4 address here. Now we assume an IPv6 address. */
552
463
fprintf(stderr, "Bad address: %s\n", ip);
553
464
return -1;
554
465
}
555
to.in6.sin6_port = htons(port); /* Spurious warning */
466
to.in6.sin6_port = htons(port); /* Spurious warning */
556
467
557
468
to.in6.sin6_scope_id = (uint32_t)if_index;
558
469
559
470
if(debug){
560
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
561
port);
471
fprintf(stderr, "Connection to: %s, port %d\n", ip, port);
562
472
char addrstr[INET6_ADDRSTRLEN] = "";
563
473
if(inet_ntop(to.in6.sin6_family, &(to.in6.sin6_addr), addrstr,
564
474
sizeof(addrstr)) == NULL){
575
485
perror("connect");
576
486
return -1;
577
487
}
578
488
579
489
const char *out = mandos_protocol_version;
580
490
written = 0;
581
491
while (true){
599
509
}
600
510
}
601
511
}
602
512
603
513
if(debug){
604
514
fprintf(stderr, "Establishing TLS session with %s\n", ip);
605
515
}
606
516
607
517
gnutls_transport_set_ptr (session, (gnutls_transport_ptr_t) tcp_sd);
608
518
609
do{
610
ret = gnutls_handshake (session);
611
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
519
ret = gnutls_handshake (session);
612
520
613
521
if (ret != GNUTLS_E_SUCCESS){
614
522
if(debug){
625
533
fprintf(stderr, "Retrieving pgp encrypted password from %s\n",
626
534
ip);
627
535
}
628
536
629
537
while(true){
630
538
buffer_capacity = adjustbuffer(&buffer, buffer_length,
631
539
buffer_capacity);
646
554
case GNUTLS_E_AGAIN:
647
555
break;
648
556
case GNUTLS_E_REHANDSHAKE:
649
do{
650
ret = gnutls_handshake (session);
651
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
557
ret = gnutls_handshake (session);
652
558
if (ret < 0){
653
559
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
654
560
gnutls_perror (ret);
675
581
gnutls_bye (session, GNUTLS_SHUT_RDWR);
676
582
677
583
if (buffer_length > 0){
678
decrypted_buffer_size = pgp_packet_decrypt(mc, buffer,
584
decrypted_buffer_size = pgp_packet_decrypt(buffer,
679
585
buffer_length,
680
&decrypted_buffer);
586
&decrypted_buffer,
587
keydir);
681
588
if (decrypted_buffer_size >= 0){
682
589
written = 0;
683
590
while(written < (size_t) decrypted_buffer_size){
698
605
} else {
699
606
retval = -1;
700
607
}
701
} else {
702
retval = -1;
703
608
}
704
609
705
610
/* Shutdown procedure */
706
611
707
612
mandos_end:
708
613
free(buffer);
709
ret = TEMP_FAILURE_RETRY(close(tcp_sd));
710
if(ret == -1){
711
perror("close");
712
}
614
close(tcp_sd);
713
615
gnutls_deinit (session);
714
616
return retval;
715
617
}
729
631
flags,
730
632
void* userdata) {
731
633
mandos_context *mc = userdata;
732
assert(r);
634
assert(r); /* Spurious warning */
733
635
734
636
/* Called whenever a service has been resolved successfully or
735
637
timed out */
747
649
char ip[AVAHI_ADDRESS_STR_MAX];
748
650
avahi_address_snprint(ip, sizeof(ip), address);
749
651
if(debug){
750
fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %"
751
PRIu16 ") on port %d\n", name, host_name, ip,
752
interface, port);
652
fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %d) on"
653
" port %d\n", name, host_name, ip, interface, port);
753
654
}
754
655
int ret = start_mandos_communication(ip, port, interface, mc);
755
656
if (ret == 0){
756
avahi_simple_poll_quit(mc->simple_poll);
657
exit(EXIT_SUCCESS);
757
658
}
758
659
}
759
660
}
771
672
flags,
772
673
void* userdata) {
773
674
mandos_context *mc = userdata;
774
assert(b);
675
assert(b); /* Spurious warning */
775
676
776
677
/* Called whenever a new services becomes available on the LAN or
777
678
is removed from the LAN */
811
712
}
812
713
}
813
714
715
/* Combines file name and path and returns the malloced new
716
string. some sane checks could/should be added */
717
static const char *combinepath(const char *first, const char *second){
718
size_t f_len = strlen(first);
719
size_t s_len = strlen(second);
720
char *tmp = malloc(f_len + s_len + 2);
721
if (tmp == NULL){
722
return NULL;
723
}
724
if(f_len > 0){
725
memcpy(tmp, first, f_len); /* Spurious warning */
726
}
727
tmp[f_len] = '/';
728
if(s_len > 0){
729
memcpy(tmp + f_len + 1, second, s_len); /* Spurious warning */
730
}
731
tmp[f_len + 1 + s_len] = '\0';
732
return tmp;
733
}
734
735
814
736
int main(int argc, char *argv[]){
815
737
AvahiSServiceBrowser *sb = NULL;
816
738
int error;
822
744
uid_t uid;
823
745
gid_t gid;
824
746
char *connect_to = NULL;
825
char tempdir[] = "/tmp/mandosXXXXXX";
826
747
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
827
const char *seckey = PATHDIR "/" SECKEY;
828
const char *pubkey = PATHDIR "/" PUBKEY;
829
748
const char *pubkeyfile = "pubkey.txt";
749
const char *seckeyfile = "seckey.txt";
830
750
mandos_context mc = { .simple_poll = NULL, .server = NULL,
831
.dh_bits = 1024, .priority = "SECURE256"
832
":!CTYPE-X.509:+CTYPE-OPENPGP" };
751
.dh_bits = 1024, .priority = "SECURE256"};
833
752
bool gnutls_initalized = false;
834
bool gpgme_initalized = false;
835
753
836
754
{
837
755
struct argp_option options[] = {
838
756
{ .name = "debug", .key = 128,
839
757
.doc = "Debug mode", .group = 3 },
840
758
{ .name = "connect", .key = 'c',
841
.arg = "ADDRESS:PORT",
842
.doc = "Connect directly to a specific Mandos server",
759
.arg = "IP",
760
.doc = "Connect directly to a sepcified mandos server",
843
761
.group = 1 },
844
762
{ .name = "interface", .key = 'i',
845
.arg = "NAME",
846
.doc = "Interface that will be used to search for Mandos"
847
" servers",
763
.arg = "INTERFACE",
764
.doc = "Interface that Avahi will conntect through",
765
.group = 1 },
766
{ .name = "keydir", .key = 'd',
767
.arg = "KEYDIR",
768
.doc = "Directory where the openpgp keyring is",
848
769
.group = 1 },
849
770
{ .name = "seckey", .key = 's',
850
.arg = "FILE",
851
.doc = "OpenPGP secret key file base name",
771
.arg = "SECKEY",
772
.doc = "Secret openpgp key for gnutls authentication",
852
773
.group = 1 },
853
774
{ .name = "pubkey", .key = 'p',
854
.arg = "FILE",
855
.doc = "OpenPGP public key file base name",
775
.arg = "PUBKEY",
776
.doc = "Public openpgp key for gnutls authentication",
856
777
.group = 2 },
857
778
{ .name = "dh-bits", .key = 129,
858
779
.arg = "BITS",
859
.doc = "Bit length of the prime number used in the"
860
" Diffie-Hellman key exchange",
780
.doc = "dh-bits to use in gnutls communication",
861
781
.group = 2 },
862
782
{ .name = "priority", .key = 130,
863
.arg = "STRING",
864
.doc = "GnuTLS priority string for the TLS handshake",
865
.group = 1 },
783
.arg = "PRIORITY",
784
.doc = "GNUTLS priority", .group = 1 },
866
785
{ .name = NULL }
867
786
};
787
868
788
869
789
error_t parse_opt (int key, char *arg,
870
790
struct argp_state *state) {
871
791
/* Get the INPUT argument from `argp_parse', which we know is
872
792
a pointer to our plugin list pointer. */
873
793
switch (key) {
874
case 128: /* --debug */
794
case 128:
875
795
debug = true;
876
796
break;
877
case 'c': /* --connect */
797
case 'c':
878
798
connect_to = arg;
879
799
break;
880
case 'i': /* --interface */
800
case 'i':
881
801
interface = arg;
882
802
break;
883
case 's': /* --seckey */
884
seckey = arg;
885
break;
886
case 'p': /* --pubkey */
887
pubkey = arg;
888
break;
889
case 129: /* --dh-bits */
803
case 'd':
804
keydir = arg;
805
break;
806
case 's':
807
seckeyfile = arg;
808
break;
809
case 'p':
810
pubkeyfile = arg;
811
break;
812
case 129:
890
813
errno = 0;
891
814
mc.dh_bits = (unsigned int) strtol(arg, NULL, 10);
892
815
if (errno){
894
817
exit(EXIT_FAILURE);
895
818
}
896
819
break;
897
case 130: /* --priority */
820
case 130:
898
821
mc.priority = arg;
899
822
break;
900
823
case ARGP_KEY_ARG:
901
824
argp_usage (state);
902
case ARGP_KEY_END:
903
825
break;
826
case ARGP_KEY_END:
827
break;
904
828
default:
905
829
return ARGP_ERR_UNKNOWN;
906
830
}
907
831
return 0;
908
832
}
909
833
910
834
struct argp argp = { .options = options, .parser = parse_opt,
911
835
.args_doc = "",
912
836
.doc = "Mandos client -- Get and decrypt"
913
" passwords from a Mandos server" };
914
ret = argp_parse (&argp, argc, argv, 0, 0, NULL);
915
if (ret == ARGP_ERR_UNKNOWN){
916
fprintf(stderr, "Unknown error while parsing arguments\n");
917
exitcode = EXIT_FAILURE;
918
goto end;
919
}
920
}
921
922
/* If the interface is down, bring it up */
923
{
924
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
925
if(sd < 0) {
926
perror("socket");
927
exitcode = EXIT_FAILURE;
928
goto end;
929
}
930
strcpy(network.ifr_name, interface);
931
ret = ioctl(sd, SIOCGIFFLAGS, &network);
932
if(ret == -1){
933
perror("ioctl SIOCGIFFLAGS");
934
exitcode = EXIT_FAILURE;
935
goto end;
936
}
937
if((network.ifr_flags & IFF_UP) == 0){
938
network.ifr_flags |= IFF_UP;
939
ret = ioctl(sd, SIOCSIFFLAGS, &network);
940
if(ret == -1){
941
perror("ioctl SIOCSIFFLAGS");
942
exitcode = EXIT_FAILURE;
943
goto end;
944
}
945
}
946
ret = TEMP_FAILURE_RETRY(close(sd));
947
if(ret == -1){
948
perror("close");
949
}
950
}
951
837
" passwords from mandos server" };
838
argp_parse (&argp, argc, argv, 0, 0, NULL);
839
}
840
841
pubkeyfile = combinepath(keydir, pubkeyfile);
842
if (pubkeyfile == NULL){
843
perror("combinepath");
844
exitcode = EXIT_FAILURE;
845
goto end;
846
}
847
848
seckeyfile = combinepath(keydir, seckeyfile);
849
if (seckeyfile == NULL){
850
perror("combinepath");
851
goto end;
852
}
853
854
ret = init_gnutls_global(&mc, pubkeyfile, seckeyfile);
855
if (ret == -1){
856
fprintf(stderr, "init_gnutls_global\n");
857
goto end;
858
} else {
859
gnutls_initalized = true;
860
}
861
952
862
uid = getuid();
953
863
gid = getgid();
954
864
955
865
ret = setuid(uid);
956
866
if (ret == -1){
957
867
perror("setuid");
962
872
perror("setgid");
963
873
}
964
874
965
ret = init_gnutls_global(&mc, pubkey, seckey);
966
if (ret == -1){
967
fprintf(stderr, "init_gnutls_global failed\n");
968
exitcode = EXIT_FAILURE;
969
goto end;
970
} else {
971
gnutls_initalized = true;
972
}
973
974
if(mkdtemp(tempdir) == NULL){
975
perror("mkdtemp");
976
tempdir[0] = '\0';
977
goto end;
978
}
979
980
if(not init_gpgme(&mc, pubkey, seckey, tempdir)){
981
fprintf(stderr, "gpgme_initalized failed\n");
982
exitcode = EXIT_FAILURE;
983
goto end;
984
} else {
985
gpgme_initalized = true;
986
}
987
988
875
if_index = (AvahiIfIndex) if_nametoindex(interface);
989
876
if(if_index == 0){
990
877
fprintf(stderr, "No such interface: \"%s\"\n", interface);
1018
905
goto end;
1019
906
}
1020
907
908
/* If the interface is down, bring it up */
909
{
910
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
911
if(sd < 0) {
912
perror("socket");
913
exitcode = EXIT_FAILURE;
914
goto end;
915
}
916
strcpy(network.ifr_name, interface); /* Spurious warning */
917
ret = ioctl(sd, SIOCGIFFLAGS, &network);
918
if(ret == -1){
919
perror("ioctl SIOCGIFFLAGS");
920
exitcode = EXIT_FAILURE;
921
goto end;
922
}
923
if((network.ifr_flags & IFF_UP) == 0){
924
network.ifr_flags |= IFF_UP;
925
ret = ioctl(sd, SIOCSIFFLAGS, &network);
926
if(ret == -1){
927
perror("ioctl SIOCSIFFLAGS");
928
exitcode = EXIT_FAILURE;
929
goto end;
930
}
931
}
932
close(sd);
933
}
934
1021
935
if (not debug){
1022
936
avahi_set_log_function(empty_log);
1023
937
}
1033
947
exitcode = EXIT_FAILURE;
1034
948
goto end;
1035
949
}
1036
950
1037
951
{
1038
952
AvahiServerConfig config;
1039
953
/* Do not publish any local Zeroconf records */
1042
956
config.publish_addresses = 0;
1043
957
config.publish_workstation = 0;
1044
958
config.publish_domain = 0;
1045
959
1046
960
/* Allocate a new server */
1047
961
mc.server = avahi_server_new(avahi_simple_poll_get
1048
962
(mc.simple_poll), &config, NULL,
1049
963
NULL, &error);
1050
964
1051
965
/* Free the Avahi configuration data */
1052
966
avahi_server_config_free(&config);
1053
967
}
1073
987
}
1074
988
1075
989
/* Run the main loop */
1076
990
1077
991
if (debug){
1078
992
fprintf(stderr, "Starting Avahi loop search\n");
1079
993
}
1081
995
avahi_simple_poll_loop(mc.simple_poll);
1082
996
1083
997
end:
1084
998
1085
999
if (debug){
1086
1000
fprintf(stderr, "%s exiting\n", argv[0]);
1087
1001
}
1092
1006
1093
1007
if (mc.server != NULL)
1094
1008
avahi_server_free(mc.server);
1095
1009
1096
1010
if (mc.simple_poll != NULL)
1097
1011
avahi_simple_poll_free(mc.simple_poll);
1098
1012
free(pubkeyfile);
1013
free(seckeyfile);
1014
1099
1015
if (gnutls_initalized){
1100
gnutls_certificate_free_credentials(mc.cred);
1016
gnutls_certificate_free_credentials (mc.cred);
1101
1017
gnutls_global_deinit ();
1102
gnutls_dh_params_deinit(mc.dh_params);
1103
}
1104
1105
if(gpgme_initalized){
1106
gpgme_release(mc.ctx);
1107
}
1108
1109
/* Removes the temp directory used by GPGME */
1110
if(tempdir[0] != '\0'){
1111
DIR *d;
1112
struct dirent *direntry;
1113
d = opendir(tempdir);
1114
if(d == NULL){
1115
perror("opendir");
1116
} else {
1117
while(true){
1118
direntry = readdir(d);
1119
if(direntry == NULL){
1120
break;
1121
}
1122
if (direntry->d_type == DT_REG){
1123
char *fullname = NULL;
1124
ret = asprintf(&fullname, "%s/%s", tempdir,
1125
direntry->d_name);
1126
if(ret < 0){
1127
perror("asprintf");
1128
continue;
1129
}
1130
ret = unlink(fullname);
1131
if(ret == -1){
1132
fprintf(stderr, "unlink(\"%s\"): %s",
1133
fullname, strerror(errno));
1134
}
1135
free(fullname);
1136
}
1137
}
1138
closedir(d);
1139
}
1140
ret = rmdir(tempdir);
1141
if(ret == -1){
1142
perror("rmdir");
1143
}
1144
}
1145
1018
}
1019
1146
1020
return exitcode;
1147
1021
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0