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237.2.10
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: plugins.d/mandos-client.c
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- Committer: Teddy Hogeborn
- Date: 2009-01-04 22:15:01 UTC
- mto: (24.1.120 mandos) (237.4.2 mandos-pipe-ipc) (299.1.1 release) (300.1.1 release) (301.1.1 release)
- mto: This revision was merged to the branch mainline in revision 238.
- Revision ID: teddy@fukt.bsnet.se-20090104221501-23vutw4cnmb575rq
* debian/mandos.README.Debian: Updated to reflect code changes.
- files added:
- .bzr-builddeb
- debian
- debian/po
- files removed:
- network-protocol.txt
- files renamed:
- clients.conf.xml => mandos-clients.conf.xml
- 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
9
9
* "browse_callback", and parts of "main".
10
10
*
11
11
* Everything else is
12
* Copyright © 2007-2008 Teddy Hogeborn & Björn Påhlsson
12
* Copyright © 2008,2009 Teddy Hogeborn
13
* Copyright © 2008,2009 Björn Påhlsson
13
14
*
14
15
* This program is free software: you can redistribute it and/or
15
16
* modify it under the terms of the GNU General Public License as
32
33
#define _LARGEFILE_SOURCE
33
34
#define _FILE_OFFSET_BITS 64
34
35
35
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY() */
36
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), asprintf() */
36
37
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 */
38
#include <stdio.h> /* fprintf(), stderr, fwrite(),
39
stdout, ferror() */
40
#include <stdint.h> /* uint16_t, uint32_t */
41
#include <stddef.h> /* NULL, size_t, ssize_t */
42
#include <stdlib.h> /* free(), EXIT_SUCCESS, EXIT_FAILURE,
43
srand() */
44
#include <stdbool.h> /* bool, true */
45
#include <string.h> /* memset(), strcmp(), strlen(),
46
strerror(), asprintf(), strcpy() */
47
#include <sys/ioctl.h> /* ioctl */
48
#include <sys/types.h> /* socket(), inet_pton(), sockaddr,
49
sockaddr_in6, PF_INET6,
50
SOCK_STREAM, INET6_ADDRSTRLEN,
51
uid_t, gid_t, open(), opendir(), DIR */
52
#include <sys/stat.h> /* open() */
53
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
54
struct in6_addr, inet_pton(),
55
connect() */
56
#include <fcntl.h> /* open() */
57
#include <dirent.h> /* opendir(), struct dirent, readdir() */
58
#include <inttypes.h> /* PRIu16 */
59
#include <assert.h> /* assert() */
60
#include <errno.h> /* perror(), errno */
61
#include <time.h> /* time() */
44
62
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
45
SIOCSIFFLAGS */
63
SIOCSIFFLAGS, if_indextoname(),
64
if_nametoindex(), IF_NAMESIZE */
65
#include <netinet/in.h>
66
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
67
getuid(), getgid(), setuid(),
68
setgid() */
69
#include <arpa/inet.h> /* inet_pton(), htons */
70
#include <iso646.h> /* not, and */
71
#include <argp.h> /* struct argp_option, error_t, struct
72
argp_state, struct argp,
73
argp_parse(), ARGP_KEY_ARG,
74
ARGP_KEY_END, ARGP_ERR_UNKNOWN */
46
75
76
/* Avahi */
77
/* All Avahi types, constants and functions
78
Avahi*, avahi_*,
79
AVAHI_* */
47
80
#include <avahi-core/core.h>
48
81
#include <avahi-core/lookup.h>
49
82
#include <avahi-core/log.h>
51
84
#include <avahi-common/malloc.h>
52
85
#include <avahi-common/error.h>
53
86
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 */
87
/* GnuTLS */
88
#include <gnutls/gnutls.h> /* All GnuTLS types, constants and
89
functions:
90
gnutls_*
91
init_gnutls_session(),
92
GNUTLS_* */
93
#include <gnutls/openpgp.h> /* gnutls_certificate_set_openpgp_key_file(),
94
GNUTLS_OPENPGP_FMT_BASE64 */
60
95
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() */
71
96
/* GPGME */
72
#include <errno.h> /* perror() */
73
#include <gpgme.h>
97
#include <gpgme.h> /* All GPGME types, constants and
98
functions:
99
gpgme_*
100
GPGME_PROTOCOL_OpenPGP,
101
GPG_ERR_NO_* */
74
102
75
103
#define BUFFER_SIZE 256
76
104
105
#define PATHDIR "/conf/conf.d/mandos"
106
#define SECKEY "seckey.txt"
107
#define PUBKEY "pubkey.txt"
108
77
109
bool debug = false;
78
static const char *keydir = "/conf/conf.d/mandos";
79
110
static const char mandos_protocol_version[] = "1";
80
const char *argp_program_version = "mandosclient 0.9";
111
const char *argp_program_version = "mandos-client " VERSION;
81
112
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
82
113
83
114
/* Used for passing in values through the Avahi callback functions */
88
119
unsigned int dh_bits;
89
120
gnutls_dh_params_t dh_params;
90
121
const char *priority;
122
gpgme_ctx_t ctx;
91
123
} mandos_context;
92
124
93
125
/*
108
140
}
109
141
110
142
/*
111
* Decrypt OpenPGP data using keyrings in HOMEDIR.
112
* Returns -1 on error
143
* Initialize GPGME.
113
144
*/
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;
145
static bool init_gpgme(mandos_context *mc, const char *seckey,
146
const char *pubkey, const char *tempdir){
147
int ret;
120
148
gpgme_error_t rc;
121
ssize_t ret;
122
size_t plaintext_capacity = 0;
123
ssize_t plaintext_length = 0;
124
149
gpgme_engine_info_t engine_info;
125
150
151
152
/*
153
* Helper function to insert pub and seckey to the enigne keyring.
154
*/
155
bool import_key(const char *filename){
156
int fd;
157
gpgme_data_t pgp_data;
158
159
fd = TEMP_FAILURE_RETRY(open(filename, O_RDONLY));
160
if(fd == -1){
161
perror("open");
162
return false;
163
}
164
165
rc = gpgme_data_new_from_fd(&pgp_data, fd);
166
if (rc != GPG_ERR_NO_ERROR){
167
fprintf(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
168
gpgme_strsource(rc), gpgme_strerror(rc));
169
return false;
170
}
171
172
rc = gpgme_op_import(mc->ctx, pgp_data);
173
if (rc != GPG_ERR_NO_ERROR){
174
fprintf(stderr, "bad gpgme_op_import: %s: %s\n",
175
gpgme_strsource(rc), gpgme_strerror(rc));
176
return false;
177
}
178
179
ret = TEMP_FAILURE_RETRY(close(fd));
180
if(ret == -1){
181
perror("close");
182
}
183
gpgme_data_release(pgp_data);
184
return true;
185
}
186
126
187
if (debug){
127
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
188
fprintf(stderr, "Initialize gpgme\n");
128
189
}
129
190
130
191
/* Init GPGME */
133
194
if (rc != GPG_ERR_NO_ERROR){
134
195
fprintf(stderr, "bad gpgme_engine_check_version: %s: %s\n",
135
196
gpgme_strsource(rc), gpgme_strerror(rc));
136
return -1;
197
return false;
137
198
}
138
199
139
/* Set GPGME home directory for the OpenPGP engine only */
200
/* Set GPGME home directory for the OpenPGP engine only */
140
201
rc = gpgme_get_engine_info (&engine_info);
141
202
if (rc != GPG_ERR_NO_ERROR){
142
203
fprintf(stderr, "bad gpgme_get_engine_info: %s: %s\n",
143
204
gpgme_strsource(rc), gpgme_strerror(rc));
144
return -1;
205
return false;
145
206
}
146
207
while(engine_info != NULL){
147
208
if(engine_info->protocol == GPGME_PROTOCOL_OpenPGP){
148
209
gpgme_set_engine_info(GPGME_PROTOCOL_OpenPGP,
149
engine_info->file_name, homedir);
210
engine_info->file_name, tempdir);
150
211
break;
151
212
}
152
213
engine_info = engine_info->next;
153
214
}
154
215
if(engine_info == NULL){
155
fprintf(stderr, "Could not set GPGME home dir to %s\n", homedir);
156
return -1;
216
fprintf(stderr, "Could not set GPGME home dir to %s\n", tempdir);
217
return false;
218
}
219
220
/* Create new GPGME "context" */
221
rc = gpgme_new(&(mc->ctx));
222
if (rc != GPG_ERR_NO_ERROR){
223
fprintf(stderr, "bad gpgme_new: %s: %s\n",
224
gpgme_strsource(rc), gpgme_strerror(rc));
225
return false;
226
}
227
228
if (not import_key(pubkey) or not import_key(seckey)){
229
return false;
230
}
231
232
return true;
233
}
234
235
/*
236
* Decrypt OpenPGP data.
237
* Returns -1 on error
238
*/
239
static ssize_t pgp_packet_decrypt (const mandos_context *mc,
240
const char *cryptotext,
241
size_t crypto_size,
242
char **plaintext){
243
gpgme_data_t dh_crypto, dh_plain;
244
gpgme_error_t rc;
245
ssize_t ret;
246
size_t plaintext_capacity = 0;
247
ssize_t plaintext_length = 0;
248
249
if (debug){
250
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
157
251
}
158
252
159
253
/* Create new GPGME data buffer from memory cryptotext */
174
268
return -1;
175
269
}
176
270
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
186
271
/* Decrypt data from the cryptotext data buffer to the plaintext
187
272
data buffer */
188
rc = gpgme_op_decrypt(ctx, dh_crypto, dh_plain);
273
rc = gpgme_op_decrypt(mc->ctx, dh_crypto, dh_plain);
189
274
if (rc != GPG_ERR_NO_ERROR){
190
275
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
191
276
gpgme_strsource(rc), gpgme_strerror(rc));
192
277
plaintext_length = -1;
278
if (debug){
279
gpgme_decrypt_result_t result;
280
result = gpgme_op_decrypt_result(mc->ctx);
281
if (result == NULL){
282
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
283
} else {
284
fprintf(stderr, "Unsupported algorithm: %s\n",
285
result->unsupported_algorithm);
286
fprintf(stderr, "Wrong key usage: %u\n",
287
result->wrong_key_usage);
288
if(result->file_name != NULL){
289
fprintf(stderr, "File name: %s\n", result->file_name);
290
}
291
gpgme_recipient_t recipient;
292
recipient = result->recipients;
293
if(recipient){
294
while(recipient != NULL){
295
fprintf(stderr, "Public key algorithm: %s\n",
296
gpgme_pubkey_algo_name(recipient->pubkey_algo));
297
fprintf(stderr, "Key ID: %s\n", recipient->keyid);
298
fprintf(stderr, "Secret key available: %s\n",
299
recipient->status == GPG_ERR_NO_SECKEY
300
? "No" : "Yes");
301
recipient = recipient->next;
302
}
303
}
304
}
305
}
193
306
goto decrypt_end;
194
307
}
195
308
197
310
fprintf(stderr, "Decryption of OpenPGP data succeeded\n");
198
311
}
199
312
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
229
313
/* Seek back to the beginning of the GPGME plaintext data buffer */
230
314
if (gpgme_data_seek(dh_plain, (off_t) 0, SEEK_SET) == -1){
231
perror("pgpme_data_seek");
315
perror("gpgme_data_seek");
232
316
plaintext_length = -1;
233
317
goto decrypt_end;
234
318
}
258
342
}
259
343
plaintext_length += ret;
260
344
}
261
345
262
346
if(debug){
263
347
fprintf(stderr, "Decrypted password is: ");
264
348
for(ssize_t i = 0; i < plaintext_length; i++){
278
362
}
279
363
280
364
static const char * safer_gnutls_strerror (int value) {
281
const char *ret = gnutls_strerror (value);
365
const char *ret = gnutls_strerror (value); /* Spurious warning */
282
366
if (ret == NULL)
283
367
ret = "(unknown)";
284
368
return ret;
291
375
}
292
376
293
377
static int init_gnutls_global(mandos_context *mc,
294
const char *pubkeyfile,
295
const char *seckeyfile){
378
const char *pubkeyfilename,
379
const char *seckeyfilename){
296
380
int ret;
297
381
298
382
if(debug){
299
383
fprintf(stderr, "Initializing GnuTLS\n");
300
384
}
301
302
if ((ret = gnutls_global_init ())
303
!= GNUTLS_E_SUCCESS) {
385
386
ret = gnutls_global_init();
387
if (ret != GNUTLS_E_SUCCESS) {
304
388
fprintf (stderr, "GnuTLS global_init: %s\n",
305
389
safer_gnutls_strerror(ret));
306
390
return -1;
315
399
}
316
400
317
401
/* OpenPGP credentials */
318
if ((ret = gnutls_certificate_allocate_credentials (&mc->cred))
319
!= GNUTLS_E_SUCCESS) {
320
fprintf (stderr, "GnuTLS memory error: %s\n",
402
gnutls_certificate_allocate_credentials(&mc->cred);
403
if (ret != GNUTLS_E_SUCCESS){
404
fprintf (stderr, "GnuTLS memory error: %s\n", /* Spurious
405
warning */
321
406
safer_gnutls_strerror(ret));
322
407
gnutls_global_deinit ();
323
408
return -1;
324
409
}
325
410
326
411
if(debug){
327
fprintf(stderr, "Attempting to use OpenPGP certificate %s"
328
" and keyfile %s as GnuTLS credentials\n", pubkeyfile,
329
seckeyfile);
412
fprintf(stderr, "Attempting to use OpenPGP public key %s and"
413
" secret key %s as GnuTLS credentials\n", pubkeyfilename,
414
seckeyfilename);
330
415
}
331
416
332
417
ret = gnutls_certificate_set_openpgp_key_file
333
(mc->cred, pubkeyfile, seckeyfile, GNUTLS_OPENPGP_FMT_BASE64);
418
(mc->cred, pubkeyfilename, seckeyfilename,
419
GNUTLS_OPENPGP_FMT_BASE64);
334
420
if (ret != GNUTLS_E_SUCCESS) {
335
421
fprintf(stderr,
336
422
"Error[%d] while reading the OpenPGP key pair ('%s',"
337
" '%s')\n", ret, pubkeyfile, seckeyfile);
338
fprintf(stdout, "The GnuTLS error is: %s\n",
423
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
424
fprintf(stderr, "The GnuTLS error is: %s\n",
339
425
safer_gnutls_strerror(ret));
340
426
goto globalfail;
341
427
}
355
441
}
356
442
357
443
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
358
444
359
445
return 0;
360
446
361
447
globalfail:
362
363
gnutls_certificate_free_credentials (mc->cred);
364
gnutls_global_deinit ();
448
449
gnutls_certificate_free_credentials(mc->cred);
450
gnutls_global_deinit();
451
gnutls_dh_params_deinit(mc->dh_params);
365
452
return -1;
366
367
453
}
368
454
369
455
static int init_gnutls_session(mandos_context *mc,
432
518
}
433
519
434
520
if(debug){
435
fprintf(stderr, "Setting up a tcp connection to %s, port %d\n",
436
ip, port);
521
fprintf(stderr, "Setting up a tcp connection to %s, port %" PRIu16
522
"\n", ip, port);
437
523
}
438
524
439
525
tcp_sd = socket(PF_INET6, SOCK_STREAM, 0);
441
527
perror("socket");
442
528
return -1;
443
529
}
444
530
445
531
if(debug){
446
532
if(if_indextoname((unsigned int)if_index, interface) == NULL){
447
533
perror("if_indextoname");
450
536
fprintf(stderr, "Binding to interface %s\n", interface);
451
537
}
452
538
453
memset(&to,0,sizeof(to)); /* Spurious warning */
539
memset(&to, 0, sizeof(to));
454
540
to.in6.sin6_family = AF_INET6;
455
541
/* It would be nice to have a way to detect if we were passed an
456
542
IPv4 address here. Now we assume an IPv6 address. */
463
549
fprintf(stderr, "Bad address: %s\n", ip);
464
550
return -1;
465
551
}
466
to.in6.sin6_port = htons(port); /* Spurious warning */
552
to.in6.sin6_port = htons(port); /* Spurious warning */
467
553
468
554
to.in6.sin6_scope_id = (uint32_t)if_index;
469
555
470
556
if(debug){
471
fprintf(stderr, "Connection to: %s, port %d\n", ip, port);
557
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
558
port);
472
559
char addrstr[INET6_ADDRSTRLEN] = "";
473
560
if(inet_ntop(to.in6.sin6_family, &(to.in6.sin6_addr), addrstr,
474
561
sizeof(addrstr)) == NULL){
485
572
perror("connect");
486
573
return -1;
487
574
}
488
575
489
576
const char *out = mandos_protocol_version;
490
577
written = 0;
491
578
while (true){
509
596
}
510
597
}
511
598
}
512
599
513
600
if(debug){
514
601
fprintf(stderr, "Establishing TLS session with %s\n", ip);
515
602
}
516
603
517
604
gnutls_transport_set_ptr (session, (gnutls_transport_ptr_t) tcp_sd);
518
605
519
ret = gnutls_handshake (session);
606
do{
607
ret = gnutls_handshake (session);
608
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
520
609
521
610
if (ret != GNUTLS_E_SUCCESS){
522
611
if(debug){
533
622
fprintf(stderr, "Retrieving pgp encrypted password from %s\n",
534
623
ip);
535
624
}
536
625
537
626
while(true){
538
627
buffer_capacity = adjustbuffer(&buffer, buffer_length,
539
628
buffer_capacity);
554
643
case GNUTLS_E_AGAIN:
555
644
break;
556
645
case GNUTLS_E_REHANDSHAKE:
557
ret = gnutls_handshake (session);
646
do{
647
ret = gnutls_handshake (session);
648
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
558
649
if (ret < 0){
559
650
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
560
651
gnutls_perror (ret);
581
672
gnutls_bye (session, GNUTLS_SHUT_RDWR);
582
673
583
674
if (buffer_length > 0){
584
decrypted_buffer_size = pgp_packet_decrypt(buffer,
675
decrypted_buffer_size = pgp_packet_decrypt(mc, buffer,
585
676
buffer_length,
586
&decrypted_buffer,
587
keydir);
677
&decrypted_buffer);
588
678
if (decrypted_buffer_size >= 0){
589
679
written = 0;
590
680
while(written < (size_t) decrypted_buffer_size){
605
695
} else {
606
696
retval = -1;
607
697
}
698
} else {
699
retval = -1;
608
700
}
609
701
610
702
/* Shutdown procedure */
611
703
612
704
mandos_end:
613
705
free(buffer);
614
close(tcp_sd);
706
ret = TEMP_FAILURE_RETRY(close(tcp_sd));
707
if(ret == -1){
708
perror("close");
709
}
615
710
gnutls_deinit (session);
616
711
return retval;
617
712
}
631
726
flags,
632
727
void* userdata) {
633
728
mandos_context *mc = userdata;
634
assert(r); /* Spurious warning */
729
assert(r);
635
730
636
731
/* Called whenever a service has been resolved successfully or
637
732
timed out */
649
744
char ip[AVAHI_ADDRESS_STR_MAX];
650
745
avahi_address_snprint(ip, sizeof(ip), address);
651
746
if(debug){
652
fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %d) on"
653
" port %d\n", name, host_name, ip, interface, port);
747
fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %"
748
PRIu16 ") on port %d\n", name, host_name, ip,
749
interface, port);
654
750
}
655
751
int ret = start_mandos_communication(ip, port, interface, mc);
656
752
if (ret == 0){
657
exit(EXIT_SUCCESS);
753
avahi_simple_poll_quit(mc->simple_poll);
658
754
}
659
755
}
660
756
}
672
768
flags,
673
769
void* userdata) {
674
770
mandos_context *mc = userdata;
675
assert(b); /* Spurious warning */
771
assert(b);
676
772
677
773
/* Called whenever a new services becomes available on the LAN or
678
774
is removed from the LAN */
712
808
}
713
809
}
714
810
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
736
811
int main(int argc, char *argv[]){
737
812
AvahiSServiceBrowser *sb = NULL;
738
813
int error;
744
819
uid_t uid;
745
820
gid_t gid;
746
821
char *connect_to = NULL;
822
char tempdir[] = "/tmp/mandosXXXXXX";
747
823
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
748
const char *pubkeyfile = "pubkey.txt";
749
const char *seckeyfile = "seckey.txt";
824
const char *seckey = PATHDIR "/" SECKEY;
825
const char *pubkey = PATHDIR "/" PUBKEY;
826
750
827
mandos_context mc = { .simple_poll = NULL, .server = NULL,
751
.dh_bits = 1024, .priority = "SECURE256"};
828
.dh_bits = 1024, .priority = "SECURE256"
829
":!CTYPE-X.509:+CTYPE-OPENPGP" };
752
830
bool gnutls_initalized = false;
831
bool gpgme_initalized = false;
753
832
754
833
{
755
834
struct argp_option options[] = {
756
835
{ .name = "debug", .key = 128,
757
836
.doc = "Debug mode", .group = 3 },
758
837
{ .name = "connect", .key = 'c',
759
.arg = "IP",
760
.doc = "Connect directly to a sepcified mandos server",
838
.arg = "ADDRESS:PORT",
839
.doc = "Connect directly to a specific Mandos server",
761
840
.group = 1 },
762
841
{ .name = "interface", .key = 'i',
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",
842
.arg = "NAME",
843
.doc = "Interface that will be used to search for Mandos"
844
" servers",
769
845
.group = 1 },
770
846
{ .name = "seckey", .key = 's',
771
.arg = "SECKEY",
772
.doc = "Secret openpgp key for gnutls authentication",
847
.arg = "FILE",
848
.doc = "OpenPGP secret key file base name",
773
849
.group = 1 },
774
850
{ .name = "pubkey", .key = 'p',
775
.arg = "PUBKEY",
776
.doc = "Public openpgp key for gnutls authentication",
851
.arg = "FILE",
852
.doc = "OpenPGP public key file base name",
777
853
.group = 2 },
778
854
{ .name = "dh-bits", .key = 129,
779
855
.arg = "BITS",
780
.doc = "dh-bits to use in gnutls communication",
856
.doc = "Bit length of the prime number used in the"
857
" Diffie-Hellman key exchange",
781
858
.group = 2 },
782
859
{ .name = "priority", .key = 130,
783
.arg = "PRIORITY",
784
.doc = "GNUTLS priority", .group = 1 },
860
.arg = "STRING",
861
.doc = "GnuTLS priority string for the TLS handshake",
862
.group = 1 },
785
863
{ .name = NULL }
786
864
};
787
788
865
789
866
error_t parse_opt (int key, char *arg,
790
867
struct argp_state *state) {
791
868
/* Get the INPUT argument from `argp_parse', which we know is
792
869
a pointer to our plugin list pointer. */
793
870
switch (key) {
794
case 128:
871
case 128: /* --debug */
795
872
debug = true;
796
873
break;
797
case 'c':
874
case 'c': /* --connect */
798
875
connect_to = arg;
799
876
break;
800
case 'i':
877
case 'i': /* --interface */
801
878
interface = arg;
802
879
break;
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:
880
case 's': /* --seckey */
881
seckey = arg;
882
break;
883
case 'p': /* --pubkey */
884
pubkey = arg;
885
break;
886
case 129: /* --dh-bits */
813
887
errno = 0;
814
888
mc.dh_bits = (unsigned int) strtol(arg, NULL, 10);
815
889
if (errno){
817
891
exit(EXIT_FAILURE);
818
892
}
819
893
break;
820
case 130:
894
case 130: /* --priority */
821
895
mc.priority = arg;
822
896
break;
823
897
case ARGP_KEY_ARG:
824
898
argp_usage (state);
899
case ARGP_KEY_END:
825
900
break;
826
case ARGP_KEY_END:
827
break;
828
901
default:
829
902
return ARGP_ERR_UNKNOWN;
830
903
}
831
904
return 0;
832
905
}
833
906
834
907
struct argp argp = { .options = options, .parser = parse_opt,
835
908
.args_doc = "",
836
909
.doc = "Mandos client -- Get and decrypt"
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
910
" passwords from a Mandos server" };
911
ret = argp_parse (&argp, argc, argv, 0, 0, NULL);
912
if (ret == ARGP_ERR_UNKNOWN){
913
fprintf(stderr, "Unknown error while parsing arguments\n");
914
exitcode = EXIT_FAILURE;
915
goto end;
916
}
917
}
918
919
/* If the interface is down, bring it up */
920
{
921
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
922
if(sd < 0) {
923
perror("socket");
924
exitcode = EXIT_FAILURE;
925
goto end;
926
}
927
strcpy(network.ifr_name, interface);
928
ret = ioctl(sd, SIOCGIFFLAGS, &network);
929
if(ret == -1){
930
perror("ioctl SIOCGIFFLAGS");
931
exitcode = EXIT_FAILURE;
932
goto end;
933
}
934
if((network.ifr_flags & IFF_UP) == 0){
935
network.ifr_flags |= IFF_UP;
936
ret = ioctl(sd, SIOCSIFFLAGS, &network);
937
if(ret == -1){
938
perror("ioctl SIOCSIFFLAGS");
939
exitcode = EXIT_FAILURE;
940
goto end;
941
}
942
}
943
ret = TEMP_FAILURE_RETRY(close(sd));
944
if(ret == -1){
945
perror("close");
946
}
947
}
948
862
949
uid = getuid();
863
950
gid = getgid();
864
951
865
952
ret = setuid(uid);
866
953
if (ret == -1){
867
954
perror("setuid");
872
959
perror("setgid");
873
960
}
874
961
962
ret = init_gnutls_global(&mc, pubkey, seckey);
963
if (ret == -1){
964
fprintf(stderr, "init_gnutls_global failed\n");
965
exitcode = EXIT_FAILURE;
966
goto end;
967
} else {
968
gnutls_initalized = true;
969
}
970
971
if(mkdtemp(tempdir) == NULL){
972
perror("mkdtemp");
973
tempdir[0] = '\0';
974
goto end;
975
}
976
977
if(not init_gpgme(&mc, pubkey, seckey, tempdir)){
978
fprintf(stderr, "gpgme_initalized failed\n");
979
exitcode = EXIT_FAILURE;
980
goto end;
981
} else {
982
gpgme_initalized = true;
983
}
984
875
985
if_index = (AvahiIfIndex) if_nametoindex(interface);
876
986
if(if_index == 0){
877
987
fprintf(stderr, "No such interface: \"%s\"\n", interface);
905
1015
goto end;
906
1016
}
907
1017
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
935
1018
if (not debug){
936
1019
avahi_set_log_function(empty_log);
937
1020
}
947
1030
exitcode = EXIT_FAILURE;
948
1031
goto end;
949
1032
}
950
1033
951
1034
{
952
1035
AvahiServerConfig config;
953
1036
/* Do not publish any local Zeroconf records */
956
1039
config.publish_addresses = 0;
957
1040
config.publish_workstation = 0;
958
1041
config.publish_domain = 0;
959
1042
960
1043
/* Allocate a new server */
961
1044
mc.server = avahi_server_new(avahi_simple_poll_get
962
1045
(mc.simple_poll), &config, NULL,
963
1046
NULL, &error);
964
1047
965
1048
/* Free the Avahi configuration data */
966
1049
avahi_server_config_free(&config);
967
1050
}
987
1070
}
988
1071
989
1072
/* Run the main loop */
990
1073
991
1074
if (debug){
992
1075
fprintf(stderr, "Starting Avahi loop search\n");
993
1076
}
995
1078
avahi_simple_poll_loop(mc.simple_poll);
996
1079
997
1080
end:
998
1081
999
1082
if (debug){
1000
1083
fprintf(stderr, "%s exiting\n", argv[0]);
1001
1084
}
1006
1089
1007
1090
if (mc.server != NULL)
1008
1091
avahi_server_free(mc.server);
1009
1092
1010
1093
if (mc.simple_poll != NULL)
1011
1094
avahi_simple_poll_free(mc.simple_poll);
1012
free(pubkeyfile);
1013
free(seckeyfile);
1014
1095
1015
1096
if (gnutls_initalized){
1016
gnutls_certificate_free_credentials (mc.cred);
1097
gnutls_certificate_free_credentials(mc.cred);
1017
1098
gnutls_global_deinit ();
1018
}
1019
1099
gnutls_dh_params_deinit(mc.dh_params);
1100
}
1101
1102
if(gpgme_initalized){
1103
gpgme_release(mc.ctx);
1104
}
1105
1106
/* Removes the temp directory used by GPGME */
1107
if(tempdir[0] != '\0'){
1108
DIR *d;
1109
struct dirent *direntry;
1110
d = opendir(tempdir);
1111
if(d == NULL){
1112
perror("opendir");
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){
1139
perror("rmdir");
1140
}
1141
}
1142
1020
1143
return exitcode;
1021
1144
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0