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- Committer: Teddy Hogeborn
- Date: 2008-11-08 17:26:35 UTC
- Revision ID: teddy@fukt.bsnet.se-20081108172635-6eexzbysvsk4bu1z
* mandos: Also import "with_statement" and "absolute_import" from
"__future__. Import "closing" from "contextlib".
(Client.__init__): Use "with closing" on "secfile".
(Client.checker_callback): Call "self.bump_timeout()" instead of
doing it directly.
(Client.bump_timeout): New method to bump up the timeout.
(TCP_handler.handle): Simplify code to provide fallback default for
GnuTLS priority string.
(IPv6_TCPServer): Do not inherit from
"SocketServer.ForkingTCPServer", since that is
undocumented - instead, follow the example code
from the documentation.
(if_nametoindex): Use "with closing" on the socket.
"__future__. Import "closing" from "contextlib".
(Client.__init__): Use "with closing" on "secfile".
(Client.checker_callback): Call "self.bump_timeout()" instead of
doing it directly.
(Client.bump_timeout): New method to bump up the timeout.
(TCP_handler.handle): Simplify code to provide fallback default for
GnuTLS priority string.
(IPv6_TCPServer): Do not inherit from
"SocketServer.ForkingTCPServer", since that is
undocumented - instead, follow the example code
from the documentation.
(if_nametoindex): Use "with closing" on the socket.
- files added:
- .bzr-builddeb
- debian
- debian/po
- 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
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 Teddy Hogeborn & Björn Påhlsson
13
13
*
14
14
* This program is free software: you can redistribute it and/or
15
15
* modify it under the terms of the GNU General Public License as
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,
38
ferror() */
37
#include <stdio.h> /* fprintf(), stderr, fwrite(),
38
stdout, ferror() */
39
39
#include <stdint.h> /* uint16_t, uint32_t */
40
40
#include <stddef.h> /* NULL, size_t, ssize_t */
41
41
#include <stdlib.h> /* free(), EXIT_SUCCESS, EXIT_FAILURE,
42
42
srand() */
43
43
#include <stdbool.h> /* bool, true */
44
44
#include <string.h> /* memset(), strcmp(), strlen(),
45
strerror(), memcpy(), strcpy() */
45
strerror(), asprintf(), strcpy() */
46
46
#include <sys/ioctl.h> /* ioctl */
47
#include <net/if.h> /* ifreq, SIOCGIFFLAGS, SIOCSIFFLAGS,
48
IFF_UP */
49
47
#include <sys/types.h> /* socket(), inet_pton(), sockaddr,
50
48
sockaddr_in6, PF_INET6,
51
49
SOCK_STREAM, INET6_ADDRSTRLEN,
52
uid_t, gid_t */
50
uid_t, gid_t, open(), opendir(), DIR */
51
#include <sys/stat.h> /* open() */
53
52
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
54
53
struct in6_addr, inet_pton(),
55
54
connect() */
55
#include <fcntl.h> /* open() */
56
#include <dirent.h> /* opendir(), struct dirent, readdir() */
57
#include <inttypes.h> /* PRIu16 */
56
58
#include <assert.h> /* assert() */
57
59
#include <errno.h> /* perror(), errno */
58
60
#include <time.h> /* time() */
59
61
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
60
62
SIOCSIFFLAGS, if_indextoname(),
61
63
if_nametoindex(), IF_NAMESIZE */
64
#include <netinet/in.h>
62
65
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
63
66
getuid(), getgid(), setuid(),
64
67
setgid() */
65
#include <netinet/in.h>
66
68
#include <arpa/inet.h> /* inet_pton(), htons */
67
69
#include <iso646.h> /* not, and */
68
70
#include <argp.h> /* struct argp_option, error_t, struct
82
84
#include <avahi-common/error.h>
83
85
84
86
/* GnuTLS */
85
#include <gnutls/gnutls.h> /* All GnuTLS types, constants and functions
87
#include <gnutls/gnutls.h> /* All GnuTLS types, constants and
88
functions:
86
89
gnutls_*
87
90
init_gnutls_session(),
88
91
GNUTLS_* */
90
93
GNUTLS_OPENPGP_FMT_BASE64 */
91
94
92
95
/* GPGME */
93
#include <gpgme.h> /* All GPGME types, constants and functions
96
#include <gpgme.h> /* All GPGME types, constants and
97
functions:
94
98
gpgme_*
95
99
GPGME_PROTOCOL_OpenPGP,
96
100
GPG_ERR_NO_* */
97
101
98
102
#define BUFFER_SIZE 256
99
103
104
#define PATHDIR "/conf/conf.d/mandos"
105
#define SECKEY "seckey.txt"
106
#define PUBKEY "pubkey.txt"
107
100
108
bool debug = false;
101
static const char *keydir = "/conf/conf.d/mandos";
102
109
static const char mandos_protocol_version[] = "1";
103
const char *argp_program_version = "mandosclient 0.9";
110
const char *argp_program_version = "mandos-client " VERSION;
104
111
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
105
112
106
113
/* Used for passing in values through the Avahi callback functions */
111
118
unsigned int dh_bits;
112
119
gnutls_dh_params_t dh_params;
113
120
const char *priority;
121
gpgme_ctx_t ctx;
114
122
} mandos_context;
115
123
116
124
/*
131
139
}
132
140
133
141
/*
134
* Decrypt OpenPGP data using keyrings in HOMEDIR.
135
* Returns -1 on error
142
* Initialize GPGME.
136
143
*/
137
static ssize_t pgp_packet_decrypt (const char *cryptotext,
138
size_t crypto_size,
139
char **plaintext,
140
const char *homedir){
141
gpgme_data_t dh_crypto, dh_plain;
142
gpgme_ctx_t ctx;
144
static bool init_gpgme(mandos_context *mc, const char *seckey,
145
const char *pubkey, const char *tempdir){
146
int ret;
143
147
gpgme_error_t rc;
144
ssize_t ret;
145
size_t plaintext_capacity = 0;
146
ssize_t plaintext_length = 0;
147
148
gpgme_engine_info_t engine_info;
148
149
150
151
/*
152
* Helper function to insert pub and seckey to the enigne keyring.
153
*/
154
bool import_key(const char *filename){
155
int fd;
156
gpgme_data_t pgp_data;
157
158
fd = TEMP_FAILURE_RETRY(open(filename, O_RDONLY));
159
if(fd == -1){
160
perror("open");
161
return false;
162
}
163
164
rc = gpgme_data_new_from_fd(&pgp_data, fd);
165
if (rc != GPG_ERR_NO_ERROR){
166
fprintf(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
167
gpgme_strsource(rc), gpgme_strerror(rc));
168
return false;
169
}
170
171
rc = gpgme_op_import(mc->ctx, pgp_data);
172
if (rc != GPG_ERR_NO_ERROR){
173
fprintf(stderr, "bad gpgme_op_import: %s: %s\n",
174
gpgme_strsource(rc), gpgme_strerror(rc));
175
return false;
176
}
177
178
ret = TEMP_FAILURE_RETRY(close(fd));
179
if(ret == -1){
180
perror("close");
181
}
182
gpgme_data_release(pgp_data);
183
return true;
184
}
185
149
186
if (debug){
150
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
187
fprintf(stderr, "Initialize gpgme\n");
151
188
}
152
189
153
190
/* Init GPGME */
156
193
if (rc != GPG_ERR_NO_ERROR){
157
194
fprintf(stderr, "bad gpgme_engine_check_version: %s: %s\n",
158
195
gpgme_strsource(rc), gpgme_strerror(rc));
159
return -1;
196
return false;
160
197
}
161
198
162
/* Set GPGME home directory for the OpenPGP engine only */
199
/* Set GPGME home directory for the OpenPGP engine only */
163
200
rc = gpgme_get_engine_info (&engine_info);
164
201
if (rc != GPG_ERR_NO_ERROR){
165
202
fprintf(stderr, "bad gpgme_get_engine_info: %s: %s\n",
166
203
gpgme_strsource(rc), gpgme_strerror(rc));
167
return -1;
204
return false;
168
205
}
169
206
while(engine_info != NULL){
170
207
if(engine_info->protocol == GPGME_PROTOCOL_OpenPGP){
171
208
gpgme_set_engine_info(GPGME_PROTOCOL_OpenPGP,
172
engine_info->file_name, homedir);
209
engine_info->file_name, tempdir);
173
210
break;
174
211
}
175
212
engine_info = engine_info->next;
176
213
}
177
214
if(engine_info == NULL){
178
fprintf(stderr, "Could not set GPGME home dir to %s\n", homedir);
179
return -1;
215
fprintf(stderr, "Could not set GPGME home dir to %s\n", tempdir);
216
return false;
217
}
218
219
/* Create new GPGME "context" */
220
rc = gpgme_new(&(mc->ctx));
221
if (rc != GPG_ERR_NO_ERROR){
222
fprintf(stderr, "bad gpgme_new: %s: %s\n",
223
gpgme_strsource(rc), gpgme_strerror(rc));
224
return false;
225
}
226
227
if (not import_key(pubkey) or not import_key(seckey)){
228
return false;
229
}
230
231
return true;
232
}
233
234
/*
235
* Decrypt OpenPGP data.
236
* Returns -1 on error
237
*/
238
static ssize_t pgp_packet_decrypt (const mandos_context *mc,
239
const char *cryptotext,
240
size_t crypto_size,
241
char **plaintext){
242
gpgme_data_t dh_crypto, dh_plain;
243
gpgme_error_t rc;
244
ssize_t ret;
245
size_t plaintext_capacity = 0;
246
ssize_t plaintext_length = 0;
247
248
if (debug){
249
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
180
250
}
181
251
182
252
/* Create new GPGME data buffer from memory cryptotext */
197
267
return -1;
198
268
}
199
269
200
/* Create new GPGME "context" */
201
rc = gpgme_new(&ctx);
202
if (rc != GPG_ERR_NO_ERROR){
203
fprintf(stderr, "bad gpgme_new: %s: %s\n",
204
gpgme_strsource(rc), gpgme_strerror(rc));
205
plaintext_length = -1;
206
goto decrypt_end;
207
}
208
209
270
/* Decrypt data from the cryptotext data buffer to the plaintext
210
271
data buffer */
211
rc = gpgme_op_decrypt(ctx, dh_crypto, dh_plain);
272
rc = gpgme_op_decrypt(mc->ctx, dh_crypto, dh_plain);
212
273
if (rc != GPG_ERR_NO_ERROR){
213
274
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
214
275
gpgme_strsource(rc), gpgme_strerror(rc));
215
276
plaintext_length = -1;
277
if (debug){
278
gpgme_decrypt_result_t result;
279
result = gpgme_op_decrypt_result(mc->ctx);
280
if (result == NULL){
281
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
282
} else {
283
fprintf(stderr, "Unsupported algorithm: %s\n",
284
result->unsupported_algorithm);
285
fprintf(stderr, "Wrong key usage: %u\n",
286
result->wrong_key_usage);
287
if(result->file_name != NULL){
288
fprintf(stderr, "File name: %s\n", result->file_name);
289
}
290
gpgme_recipient_t recipient;
291
recipient = result->recipients;
292
if(recipient){
293
while(recipient != NULL){
294
fprintf(stderr, "Public key algorithm: %s\n",
295
gpgme_pubkey_algo_name(recipient->pubkey_algo));
296
fprintf(stderr, "Key ID: %s\n", recipient->keyid);
297
fprintf(stderr, "Secret key available: %s\n",
298
recipient->status == GPG_ERR_NO_SECKEY
299
? "No" : "Yes");
300
recipient = recipient->next;
301
}
302
}
303
}
304
}
216
305
goto decrypt_end;
217
306
}
218
307
220
309
fprintf(stderr, "Decryption of OpenPGP data succeeded\n");
221
310
}
222
311
223
if (debug){
224
gpgme_decrypt_result_t result;
225
result = gpgme_op_decrypt_result(ctx);
226
if (result == NULL){
227
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
228
} else {
229
fprintf(stderr, "Unsupported algorithm: %s\n",
230
result->unsupported_algorithm);
231
fprintf(stderr, "Wrong key usage: %d\n",
232
result->wrong_key_usage);
233
if(result->file_name != NULL){
234
fprintf(stderr, "File name: %s\n", result->file_name);
235
}
236
gpgme_recipient_t recipient;
237
recipient = result->recipients;
238
if(recipient){
239
while(recipient != NULL){
240
fprintf(stderr, "Public key algorithm: %s\n",
241
gpgme_pubkey_algo_name(recipient->pubkey_algo));
242
fprintf(stderr, "Key ID: %s\n", recipient->keyid);
243
fprintf(stderr, "Secret key available: %s\n",
244
recipient->status == GPG_ERR_NO_SECKEY
245
? "No" : "Yes");
246
recipient = recipient->next;
247
}
248
}
249
}
250
}
251
252
312
/* Seek back to the beginning of the GPGME plaintext data buffer */
253
313
if (gpgme_data_seek(dh_plain, (off_t) 0, SEEK_SET) == -1){
254
perror("pgpme_data_seek");
314
perror("gpgme_data_seek");
255
315
plaintext_length = -1;
256
316
goto decrypt_end;
257
317
}
281
341
}
282
342
plaintext_length += ret;
283
343
}
284
344
285
345
if(debug){
286
346
fprintf(stderr, "Decrypted password is: ");
287
347
for(ssize_t i = 0; i < plaintext_length; i++){
301
361
}
302
362
303
363
static const char * safer_gnutls_strerror (int value) {
304
const char *ret = gnutls_strerror (value);
364
const char *ret = gnutls_strerror (value); /* Spurious warning */
305
365
if (ret == NULL)
306
366
ret = "(unknown)";
307
367
return ret;
314
374
}
315
375
316
376
static int init_gnutls_global(mandos_context *mc,
317
const char *pubkeyfile,
318
const char *seckeyfile){
377
const char *pubkeyfilename,
378
const char *seckeyfilename){
319
379
int ret;
320
380
321
381
if(debug){
340
400
/* OpenPGP credentials */
341
401
gnutls_certificate_allocate_credentials(&mc->cred);
342
402
if (ret != GNUTLS_E_SUCCESS){
343
fprintf (stderr, "GnuTLS memory error: %s\n",
403
fprintf (stderr, "GnuTLS memory error: %s\n", /* Spurious
404
warning */
344
405
safer_gnutls_strerror(ret));
345
406
gnutls_global_deinit ();
346
407
return -1;
347
408
}
348
409
349
410
if(debug){
350
fprintf(stderr, "Attempting to use OpenPGP certificate %s"
351
" and keyfile %s as GnuTLS credentials\n", pubkeyfile,
352
seckeyfile);
411
fprintf(stderr, "Attempting to use OpenPGP public key %s and"
412
" secret key %s as GnuTLS credentials\n", pubkeyfilename,
413
seckeyfilename);
353
414
}
354
415
355
416
ret = gnutls_certificate_set_openpgp_key_file
356
(mc->cred, pubkeyfile, seckeyfile, GNUTLS_OPENPGP_FMT_BASE64);
417
(mc->cred, pubkeyfilename, seckeyfilename,
418
GNUTLS_OPENPGP_FMT_BASE64);
357
419
if (ret != GNUTLS_E_SUCCESS) {
358
420
fprintf(stderr,
359
421
"Error[%d] while reading the OpenPGP key pair ('%s',"
360
" '%s')\n", ret, pubkeyfile, seckeyfile);
361
fprintf(stdout, "The GnuTLS error is: %s\n",
422
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
423
fprintf(stderr, "The GnuTLS error is: %s\n",
362
424
safer_gnutls_strerror(ret));
363
425
goto globalfail;
364
426
}
378
440
}
379
441
380
442
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
381
443
382
444
return 0;
383
445
384
446
globalfail:
385
447
386
448
gnutls_certificate_free_credentials(mc->cred);
387
449
gnutls_global_deinit();
450
gnutls_dh_params_deinit(mc->dh_params);
388
451
return -1;
389
390
452
}
391
453
392
454
static int init_gnutls_session(mandos_context *mc,
455
517
}
456
518
457
519
if(debug){
458
fprintf(stderr, "Setting up a tcp connection to %s, port %d\n",
459
ip, port);
520
fprintf(stderr, "Setting up a tcp connection to %s, port %" PRIu16
521
"\n", ip, port);
460
522
}
461
523
462
524
tcp_sd = socket(PF_INET6, SOCK_STREAM, 0);
464
526
perror("socket");
465
527
return -1;
466
528
}
467
529
468
530
if(debug){
469
531
if(if_indextoname((unsigned int)if_index, interface) == NULL){
470
532
perror("if_indextoname");
473
535
fprintf(stderr, "Binding to interface %s\n", interface);
474
536
}
475
537
476
memset(&to,0,sizeof(to)); /* Spurious warning */
538
memset(&to, 0, sizeof(to));
477
539
to.in6.sin6_family = AF_INET6;
478
540
/* It would be nice to have a way to detect if we were passed an
479
541
IPv4 address here. Now we assume an IPv6 address. */
486
548
fprintf(stderr, "Bad address: %s\n", ip);
487
549
return -1;
488
550
}
489
to.in6.sin6_port = htons(port); /* Spurious warning */
551
to.in6.sin6_port = htons(port); /* Spurious warning */
490
552
491
553
to.in6.sin6_scope_id = (uint32_t)if_index;
492
554
493
555
if(debug){
494
fprintf(stderr, "Connection to: %s, port %d\n", ip, port);
556
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
557
port);
495
558
char addrstr[INET6_ADDRSTRLEN] = "";
496
559
if(inet_ntop(to.in6.sin6_family, &(to.in6.sin6_addr), addrstr,
497
560
sizeof(addrstr)) == NULL){
508
571
perror("connect");
509
572
return -1;
510
573
}
511
574
512
575
const char *out = mandos_protocol_version;
513
576
written = 0;
514
577
while (true){
532
595
}
533
596
}
534
597
}
535
598
536
599
if(debug){
537
600
fprintf(stderr, "Establishing TLS session with %s\n", ip);
538
601
}
539
602
540
603
gnutls_transport_set_ptr (session, (gnutls_transport_ptr_t) tcp_sd);
541
604
542
605
do{
543
606
ret = gnutls_handshake (session);
544
607
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
558
621
fprintf(stderr, "Retrieving pgp encrypted password from %s\n",
559
622
ip);
560
623
}
561
624
562
625
while(true){
563
626
buffer_capacity = adjustbuffer(&buffer, buffer_length,
564
627
buffer_capacity);
608
671
gnutls_bye (session, GNUTLS_SHUT_RDWR);
609
672
610
673
if (buffer_length > 0){
611
decrypted_buffer_size = pgp_packet_decrypt(buffer,
674
decrypted_buffer_size = pgp_packet_decrypt(mc, buffer,
612
675
buffer_length,
613
&decrypted_buffer,
614
keydir);
676
&decrypted_buffer);
615
677
if (decrypted_buffer_size >= 0){
616
678
written = 0;
617
679
while(written < (size_t) decrypted_buffer_size){
632
694
} else {
633
695
retval = -1;
634
696
}
697
} else {
698
retval = -1;
635
699
}
636
700
637
701
/* Shutdown procedure */
638
702
639
703
mandos_end:
640
704
free(buffer);
641
close(tcp_sd);
705
ret = TEMP_FAILURE_RETRY(close(tcp_sd));
706
if(ret == -1){
707
perror("close");
708
}
642
709
gnutls_deinit (session);
643
710
return retval;
644
711
}
658
725
flags,
659
726
void* userdata) {
660
727
mandos_context *mc = userdata;
661
assert(r); /* Spurious warning */
728
assert(r);
662
729
663
730
/* Called whenever a service has been resolved successfully or
664
731
timed out */
676
743
char ip[AVAHI_ADDRESS_STR_MAX];
677
744
avahi_address_snprint(ip, sizeof(ip), address);
678
745
if(debug){
679
fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %d) on"
680
" port %d\n", name, host_name, ip, interface, port);
746
fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %"
747
PRIu16 ") on port %d\n", name, host_name, ip,
748
interface, port);
681
749
}
682
750
int ret = start_mandos_communication(ip, port, interface, mc);
683
751
if (ret == 0){
684
exit(EXIT_SUCCESS);
752
avahi_simple_poll_quit(mc->simple_poll);
685
753
}
686
754
}
687
755
}
699
767
flags,
700
768
void* userdata) {
701
769
mandos_context *mc = userdata;
702
assert(b); /* Spurious warning */
770
assert(b);
703
771
704
772
/* Called whenever a new services becomes available on the LAN or
705
773
is removed from the LAN */
739
807
}
740
808
}
741
809
742
/* Combines file name and path and returns the malloced new
743
string. some sane checks could/should be added */
744
static const char *combinepath(const char *first, const char *second){
745
size_t f_len = strlen(first);
746
size_t s_len = strlen(second);
747
char *tmp = malloc(f_len + s_len + 2);
748
if (tmp == NULL){
749
return NULL;
750
}
751
if(f_len > 0){
752
memcpy(tmp, first, f_len); /* Spurious warning */
753
}
754
tmp[f_len] = '/';
755
if(s_len > 0){
756
memcpy(tmp + f_len + 1, second, s_len); /* Spurious warning */
757
}
758
tmp[f_len + 1 + s_len] = '\0';
759
return tmp;
760
}
761
762
763
810
int main(int argc, char *argv[]){
764
811
AvahiSServiceBrowser *sb = NULL;
765
812
int error;
771
818
uid_t uid;
772
819
gid_t gid;
773
820
char *connect_to = NULL;
821
char tempdir[] = "/tmp/mandosXXXXXX";
774
822
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
775
const char *pubkeyfile = "pubkey.txt";
776
const char *seckeyfile = "seckey.txt";
823
const char *seckey = PATHDIR "/" SECKEY;
824
const char *pubkey = PATHDIR "/" PUBKEY;
825
777
826
mandos_context mc = { .simple_poll = NULL, .server = NULL,
778
.dh_bits = 1024, .priority = "SECURE256"};
827
.dh_bits = 1024, .priority = "SECURE256"
828
":!CTYPE-X.509:+CTYPE-OPENPGP" };
779
829
bool gnutls_initalized = false;
830
bool gpgme_initalized = false;
780
831
781
832
{
782
833
struct argp_option options[] = {
783
834
{ .name = "debug", .key = 128,
784
835
.doc = "Debug mode", .group = 3 },
785
836
{ .name = "connect", .key = 'c',
786
.arg = "IP",
787
.doc = "Connect directly to a sepcified mandos server",
837
.arg = "ADDRESS:PORT",
838
.doc = "Connect directly to a specific Mandos server",
788
839
.group = 1 },
789
840
{ .name = "interface", .key = 'i',
790
.arg = "INTERFACE",
791
.doc = "Interface that Avahi will conntect through",
792
.group = 1 },
793
{ .name = "keydir", .key = 'd',
794
.arg = "KEYDIR",
795
.doc = "Directory where the openpgp keyring is",
841
.arg = "NAME",
842
.doc = "Interface that will be used to search for Mandos"
843
" servers",
796
844
.group = 1 },
797
845
{ .name = "seckey", .key = 's',
798
.arg = "SECKEY",
799
.doc = "Secret openpgp key for gnutls authentication",
846
.arg = "FILE",
847
.doc = "OpenPGP secret key file base name",
800
848
.group = 1 },
801
849
{ .name = "pubkey", .key = 'p',
802
.arg = "PUBKEY",
803
.doc = "Public openpgp key for gnutls authentication",
850
.arg = "FILE",
851
.doc = "OpenPGP public key file base name",
804
852
.group = 2 },
805
853
{ .name = "dh-bits", .key = 129,
806
854
.arg = "BITS",
807
.doc = "dh-bits to use in gnutls communication",
855
.doc = "Bit length of the prime number used in the"
856
" Diffie-Hellman key exchange",
808
857
.group = 2 },
809
858
{ .name = "priority", .key = 130,
810
.arg = "PRIORITY",
811
.doc = "GNUTLS priority", .group = 1 },
859
.arg = "STRING",
860
.doc = "GnuTLS priority string for the TLS handshake",
861
.group = 1 },
812
862
{ .name = NULL }
813
863
};
814
815
864
816
865
error_t parse_opt (int key, char *arg,
817
866
struct argp_state *state) {
818
867
/* Get the INPUT argument from `argp_parse', which we know is
819
868
a pointer to our plugin list pointer. */
820
869
switch (key) {
821
case 128:
870
case 128: /* --debug */
822
871
debug = true;
823
872
break;
824
case 'c':
873
case 'c': /* --connect */
825
874
connect_to = arg;
826
875
break;
827
case 'i':
876
case 'i': /* --interface */
828
877
interface = arg;
829
878
break;
830
case 'd':
831
keydir = arg;
832
break;
833
case 's':
834
seckeyfile = arg;
835
break;
836
case 'p':
837
pubkeyfile = arg;
838
break;
839
case 129:
879
case 's': /* --seckey */
880
seckey = arg;
881
break;
882
case 'p': /* --pubkey */
883
pubkey = arg;
884
break;
885
case 129: /* --dh-bits */
840
886
errno = 0;
841
887
mc.dh_bits = (unsigned int) strtol(arg, NULL, 10);
842
888
if (errno){
844
890
exit(EXIT_FAILURE);
845
891
}
846
892
break;
847
case 130:
893
case 130: /* --priority */
848
894
mc.priority = arg;
849
895
break;
850
896
case ARGP_KEY_ARG:
851
897
argp_usage (state);
898
case ARGP_KEY_END:
852
899
break;
853
case ARGP_KEY_END:
854
break;
855
900
default:
856
901
return ARGP_ERR_UNKNOWN;
857
902
}
858
903
return 0;
859
904
}
860
905
861
906
struct argp argp = { .options = options, .parser = parse_opt,
862
907
.args_doc = "",
863
908
.doc = "Mandos client -- Get and decrypt"
864
" passwords from mandos server" };
909
" passwords from a Mandos server" };
865
910
ret = argp_parse (&argp, argc, argv, 0, 0, NULL);
866
911
if (ret == ARGP_ERR_UNKNOWN){
867
fprintf(stderr, "Unkown error while parsing arguments\n");
868
exitcode = EXIT_FAILURE;
869
goto end;
870
}
871
}
872
873
pubkeyfile = combinepath(keydir, pubkeyfile);
874
if (pubkeyfile == NULL){
875
perror("combinepath");
876
exitcode = EXIT_FAILURE;
877
goto end;
878
}
879
880
seckeyfile = combinepath(keydir, seckeyfile);
881
if (seckeyfile == NULL){
882
perror("combinepath");
883
goto end;
884
}
885
886
ret = init_gnutls_global(&mc, pubkeyfile, seckeyfile);
887
if (ret == -1){
888
fprintf(stderr, "init_gnutls_global\n");
889
goto end;
890
} else {
891
gnutls_initalized = true;
892
}
893
912
fprintf(stderr, "Unknown error while parsing arguments\n");
913
exitcode = EXIT_FAILURE;
914
goto end;
915
}
916
}
917
918
/* If the interface is down, bring it up */
919
{
920
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
921
if(sd < 0) {
922
perror("socket");
923
exitcode = EXIT_FAILURE;
924
goto end;
925
}
926
strcpy(network.ifr_name, interface);
927
ret = ioctl(sd, SIOCGIFFLAGS, &network);
928
if(ret == -1){
929
perror("ioctl SIOCGIFFLAGS");
930
exitcode = EXIT_FAILURE;
931
goto end;
932
}
933
if((network.ifr_flags & IFF_UP) == 0){
934
network.ifr_flags |= IFF_UP;
935
ret = ioctl(sd, SIOCSIFFLAGS, &network);
936
if(ret == -1){
937
perror("ioctl SIOCSIFFLAGS");
938
exitcode = EXIT_FAILURE;
939
goto end;
940
}
941
}
942
ret = TEMP_FAILURE_RETRY(close(sd));
943
if(ret == -1){
944
perror("close");
945
}
946
}
947
894
948
uid = getuid();
895
949
gid = getgid();
896
950
897
951
ret = setuid(uid);
898
952
if (ret == -1){
899
953
perror("setuid");
904
958
perror("setgid");
905
959
}
906
960
961
ret = init_gnutls_global(&mc, pubkey, seckey);
962
if (ret == -1){
963
fprintf(stderr, "init_gnutls_global failed\n");
964
exitcode = EXIT_FAILURE;
965
goto end;
966
} else {
967
gnutls_initalized = true;
968
}
969
970
if(mkdtemp(tempdir) == NULL){
971
perror("mkdtemp");
972
tempdir[0] = '\0';
973
goto end;
974
}
975
976
if(not init_gpgme(&mc, pubkey, seckey, tempdir)){
977
fprintf(stderr, "gpgme_initalized failed\n");
978
exitcode = EXIT_FAILURE;
979
goto end;
980
} else {
981
gpgme_initalized = true;
982
}
983
907
984
if_index = (AvahiIfIndex) if_nametoindex(interface);
908
985
if(if_index == 0){
909
986
fprintf(stderr, "No such interface: \"%s\"\n", interface);
937
1014
goto end;
938
1015
}
939
1016
940
/* If the interface is down, bring it up */
941
{
942
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
943
if(sd < 0) {
944
perror("socket");
945
exitcode = EXIT_FAILURE;
946
goto end;
947
}
948
strcpy(network.ifr_name, interface); /* Spurious warning */
949
ret = ioctl(sd, SIOCGIFFLAGS, &network);
950
if(ret == -1){
951
perror("ioctl SIOCGIFFLAGS");
952
exitcode = EXIT_FAILURE;
953
goto end;
954
}
955
if((network.ifr_flags & IFF_UP) == 0){
956
network.ifr_flags |= IFF_UP;
957
ret = ioctl(sd, SIOCSIFFLAGS, &network);
958
if(ret == -1){
959
perror("ioctl SIOCSIFFLAGS");
960
exitcode = EXIT_FAILURE;
961
goto end;
962
}
963
}
964
close(sd);
965
}
966
967
1017
if (not debug){
968
1018
avahi_set_log_function(empty_log);
969
1019
}
979
1029
exitcode = EXIT_FAILURE;
980
1030
goto end;
981
1031
}
982
1032
983
1033
{
984
1034
AvahiServerConfig config;
985
1035
/* Do not publish any local Zeroconf records */
988
1038
config.publish_addresses = 0;
989
1039
config.publish_workstation = 0;
990
1040
config.publish_domain = 0;
991
1041
992
1042
/* Allocate a new server */
993
1043
mc.server = avahi_server_new(avahi_simple_poll_get
994
1044
(mc.simple_poll), &config, NULL,
995
1045
NULL, &error);
996
1046
997
1047
/* Free the Avahi configuration data */
998
1048
avahi_server_config_free(&config);
999
1049
}
1019
1069
}
1020
1070
1021
1071
/* Run the main loop */
1022
1072
1023
1073
if (debug){
1024
1074
fprintf(stderr, "Starting Avahi loop search\n");
1025
1075
}
1027
1077
avahi_simple_poll_loop(mc.simple_poll);
1028
1078
1029
1079
end:
1030
1080
1031
1081
if (debug){
1032
1082
fprintf(stderr, "%s exiting\n", argv[0]);
1033
1083
}
1038
1088
1039
1089
if (mc.server != NULL)
1040
1090
avahi_server_free(mc.server);
1041
1091
1042
1092
if (mc.simple_poll != NULL)
1043
1093
avahi_simple_poll_free(mc.simple_poll);
1044
free(pubkeyfile);
1045
free(seckeyfile);
1046
1094
1047
1095
if (gnutls_initalized){
1048
1096
gnutls_certificate_free_credentials(mc.cred);
1049
1097
gnutls_global_deinit ();
1050
}
1051
1098
gnutls_dh_params_deinit(mc.dh_params);
1099
}
1100
1101
if(gpgme_initalized){
1102
gpgme_release(mc.ctx);
1103
}
1104
1105
/* Removes the temp directory used by GPGME */
1106
if(tempdir[0] != '\0'){
1107
DIR *d;
1108
struct dirent *direntry;
1109
d = opendir(tempdir);
1110
if(d == NULL){
1111
perror("opendir");
1112
} else {
1113
while(true){
1114
direntry = readdir(d);
1115
if(direntry == NULL){
1116
break;
1117
}
1118
if (direntry->d_type == DT_REG){
1119
char *fullname = NULL;
1120
ret = asprintf(&fullname, "%s/%s", tempdir,
1121
direntry->d_name);
1122
if(ret < 0){
1123
perror("asprintf");
1124
continue;
1125
}
1126
ret = unlink(fullname);
1127
if(ret == -1){
1128
fprintf(stderr, "unlink(\"%s\"): %s",
1129
fullname, strerror(errno));
1130
}
1131
free(fullname);
1132
}
1133
}
1134
closedir(d);
1135
}
1136
ret = rmdir(tempdir);
1137
if(ret == -1){
1138
perror("rmdir");
1139
}
1140
}
1141
1052
1142
return exitcode;
1053
1143
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0