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- Committer: Teddy Hogeborn
- Date: 2008-08-12 19:22:34 UTC
- Revision ID: teddy@fukt.bsnet.se-20080812192234-8bm17713ltih9ud1
* initramfs-tools-hook: New.
* initramfs-tools-hook-conf: New.
* initramfs-tools-hook-conf: New.
- files added:
- network-protocol.txt
- files removed:
- .bzr-builddeb
- debian
- debian/po
- 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
1
1
/* -*- coding: utf-8 -*- */
2
2
/*
3
* Mandos-client - get and decrypt data from a Mandos server
3
* Mandos client - get and decrypt data from a Mandos server
4
4
*
5
5
* This program is partly derived from an example program for an Avahi
6
6
* service browser, downloaded from
9
9
* "browse_callback", and parts of "main".
10
10
*
11
11
* Everything else is
12
* Copyright © 2008,2009 Teddy Hogeborn
13
* Copyright © 2008,2009 Björn Påhlsson
12
* Copyright © 2007-2008 Teddy Hogeborn & Björn Påhlsson
14
13
*
15
14
* This program is free software: you can redistribute it and/or
16
15
* modify it under the terms of the GNU General Public License as
33
32
#define _LARGEFILE_SOURCE
34
33
#define _FILE_OFFSET_BITS 64
35
34
36
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), asprintf() */
35
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY() */
37
36
38
#include <stdio.h> /* fprintf(), stderr, fwrite(),
39
stdout, ferror(), sscanf */
37
#include <stdio.h> /* fprintf(), stderr, fwrite(), stdout,
38
ferror() */
40
39
#include <stdint.h> /* uint16_t, uint32_t */
41
40
#include <stddef.h> /* NULL, size_t, ssize_t */
42
41
#include <stdlib.h> /* free(), EXIT_SUCCESS, EXIT_FAILURE,
43
42
srand() */
44
43
#include <stdbool.h> /* bool, true */
45
44
#include <string.h> /* memset(), strcmp(), strlen(),
46
strerror(), asprintf(), strcpy() */
45
strerror(), memcpy(), strcpy() */
47
46
#include <sys/ioctl.h> /* ioctl */
48
47
#include <sys/types.h> /* socket(), inet_pton(), sockaddr,
49
48
sockaddr_in6, PF_INET6,
50
49
SOCK_STREAM, INET6_ADDRSTRLEN,
51
uid_t, gid_t, open(), opendir(), DIR */
52
#include <sys/stat.h> /* open() */
50
uid_t, gid_t */
51
#include <inttypes.h> /* PRIu16 */
53
52
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
54
53
struct in6_addr, inet_pton(),
55
54
connect() */
56
#include <fcntl.h> /* open() */
57
#include <dirent.h> /* opendir(), struct dirent, readdir() */
58
#include <inttypes.h> /* PRIu16, SCNu16 */
59
55
#include <assert.h> /* assert() */
60
56
#include <errno.h> /* perror(), errno */
61
57
#include <time.h> /* time() */
62
58
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
63
59
SIOCSIFFLAGS, if_indextoname(),
64
60
if_nametoindex(), IF_NAMESIZE */
65
#include <netinet/in.h>
66
61
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
67
62
getuid(), getgid(), setuid(),
68
63
setgid() */
64
#include <netinet/in.h>
69
65
#include <arpa/inet.h> /* inet_pton(), htons */
70
#include <iso646.h> /* not, and, or */
66
#include <iso646.h> /* not, and */
71
67
#include <argp.h> /* struct argp_option, error_t, struct
72
68
argp_state, struct argp,
73
69
argp_parse(), ARGP_KEY_ARG,
85
81
#include <avahi-common/error.h>
86
82
87
83
/* GnuTLS */
88
#include <gnutls/gnutls.h> /* All GnuTLS types, constants and
89
functions:
84
#include <gnutls/gnutls.h> /* All GnuTLS types, constants and functions
90
85
gnutls_*
91
86
init_gnutls_session(),
92
87
GNUTLS_* */
94
89
GNUTLS_OPENPGP_FMT_BASE64 */
95
90
96
91
/* GPGME */
97
#include <gpgme.h> /* All GPGME types, constants and
98
functions:
92
#include <gpgme.h> /* All GPGME types, constants and functions
99
93
gpgme_*
100
94
GPGME_PROTOCOL_OpenPGP,
101
95
GPG_ERR_NO_* */
102
96
103
97
#define BUFFER_SIZE 256
104
98
105
#define PATHDIR "/conf/conf.d/mandos"
106
#define SECKEY "seckey.txt"
107
#define PUBKEY "pubkey.txt"
108
109
99
bool debug = false;
100
static const char *keydir = "/conf/conf.d/mandos";
110
101
static const char mandos_protocol_version[] = "1";
111
const char *argp_program_version = "mandos-client " VERSION;
102
const char *argp_program_version = "password-request 1.0";
112
103
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
113
104
114
105
/* Used for passing in values through the Avahi callback functions */
119
110
unsigned int dh_bits;
120
111
gnutls_dh_params_t dh_params;
121
112
const char *priority;
122
gpgme_ctx_t ctx;
123
113
} mandos_context;
124
114
125
115
/*
140
130
}
141
131
142
132
/*
143
* Initialize GPGME.
133
* Decrypt OpenPGP data using keyrings in HOMEDIR.
134
* Returns -1 on error
144
135
*/
145
static bool init_gpgme(mandos_context *mc, const char *seckey,
146
const char *pubkey, const char *tempdir){
147
int ret;
136
static ssize_t pgp_packet_decrypt (const char *cryptotext,
137
size_t crypto_size,
138
char **plaintext,
139
const char *homedir){
140
gpgme_data_t dh_crypto, dh_plain;
141
gpgme_ctx_t ctx;
148
142
gpgme_error_t rc;
143
ssize_t ret;
144
size_t plaintext_capacity = 0;
145
ssize_t plaintext_length = 0;
149
146
gpgme_engine_info_t engine_info;
150
147
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 = (int)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 = (int)TEMP_FAILURE_RETRY(close(fd));
180
if(ret == -1){
181
perror("close");
182
}
183
gpgme_data_release(pgp_data);
184
return true;
185
}
186
187
148
if (debug){
188
fprintf(stderr, "Initialize gpgme\n");
149
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
189
150
}
190
151
191
152
/* Init GPGME */
194
155
if (rc != GPG_ERR_NO_ERROR){
195
156
fprintf(stderr, "bad gpgme_engine_check_version: %s: %s\n",
196
157
gpgme_strsource(rc), gpgme_strerror(rc));
197
return false;
158
return -1;
198
159
}
199
160
200
/* Set GPGME home directory for the OpenPGP engine only */
161
/* Set GPGME home directory for the OpenPGP engine only */
201
162
rc = gpgme_get_engine_info (&engine_info);
202
163
if (rc != GPG_ERR_NO_ERROR){
203
164
fprintf(stderr, "bad gpgme_get_engine_info: %s: %s\n",
204
165
gpgme_strsource(rc), gpgme_strerror(rc));
205
return false;
166
return -1;
206
167
}
207
168
while(engine_info != NULL){
208
169
if(engine_info->protocol == GPGME_PROTOCOL_OpenPGP){
209
170
gpgme_set_engine_info(GPGME_PROTOCOL_OpenPGP,
210
engine_info->file_name, tempdir);
171
engine_info->file_name, homedir);
211
172
break;
212
173
}
213
174
engine_info = engine_info->next;
214
175
}
215
176
if(engine_info == NULL){
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");
177
fprintf(stderr, "Could not set GPGME home dir to %s\n", homedir);
178
return -1;
251
179
}
252
180
253
181
/* Create new GPGME data buffer from memory cryptotext */
268
196
return -1;
269
197
}
270
198
199
/* Create new GPGME "context" */
200
rc = gpgme_new(&ctx);
201
if (rc != GPG_ERR_NO_ERROR){
202
fprintf(stderr, "bad gpgme_new: %s: %s\n",
203
gpgme_strsource(rc), gpgme_strerror(rc));
204
plaintext_length = -1;
205
goto decrypt_end;
206
}
207
271
208
/* Decrypt data from the cryptotext data buffer to the plaintext
272
209
data buffer */
273
rc = gpgme_op_decrypt(mc->ctx, dh_crypto, dh_plain);
210
rc = gpgme_op_decrypt(ctx, dh_crypto, dh_plain);
274
211
if (rc != GPG_ERR_NO_ERROR){
275
212
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
276
213
gpgme_strsource(rc), gpgme_strerror(rc));
277
214
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
}
306
215
goto decrypt_end;
307
216
}
308
217
310
219
fprintf(stderr, "Decryption of OpenPGP data succeeded\n");
311
220
}
312
221
222
if (debug){
223
gpgme_decrypt_result_t result;
224
result = gpgme_op_decrypt_result(ctx);
225
if (result == NULL){
226
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
227
} else {
228
fprintf(stderr, "Unsupported algorithm: %s\n",
229
result->unsupported_algorithm);
230
fprintf(stderr, "Wrong key usage: %u\n",
231
result->wrong_key_usage);
232
if(result->file_name != NULL){
233
fprintf(stderr, "File name: %s\n", result->file_name);
234
}
235
gpgme_recipient_t recipient;
236
recipient = result->recipients;
237
if(recipient){
238
while(recipient != NULL){
239
fprintf(stderr, "Public key algorithm: %s\n",
240
gpgme_pubkey_algo_name(recipient->pubkey_algo));
241
fprintf(stderr, "Key ID: %s\n", recipient->keyid);
242
fprintf(stderr, "Secret key available: %s\n",
243
recipient->status == GPG_ERR_NO_SECKEY
244
? "No" : "Yes");
245
recipient = recipient->next;
246
}
247
}
248
}
249
}
250
313
251
/* Seek back to the beginning of the GPGME plaintext data buffer */
314
252
if (gpgme_data_seek(dh_plain, (off_t) 0, SEEK_SET) == -1){
315
perror("gpgme_data_seek");
253
perror("pgpme_data_seek");
316
254
plaintext_length = -1;
317
255
goto decrypt_end;
318
256
}
342
280
}
343
281
plaintext_length += ret;
344
282
}
345
283
346
284
if(debug){
347
285
fprintf(stderr, "Decrypted password is: ");
348
286
for(ssize_t i = 0; i < plaintext_length; i++){
362
300
}
363
301
364
302
static const char * safer_gnutls_strerror (int value) {
365
const char *ret = gnutls_strerror (value); /* Spurious warning */
303
const char *ret = gnutls_strerror (value);
366
304
if (ret == NULL)
367
305
ret = "(unknown)";
368
306
return ret;
375
313
}
376
314
377
315
static int init_gnutls_global(mandos_context *mc,
378
const char *pubkeyfilename,
379
const char *seckeyfilename){
316
const char *pubkeyfile,
317
const char *seckeyfile){
380
318
int ret;
381
319
382
320
if(debug){
401
339
/* OpenPGP credentials */
402
340
gnutls_certificate_allocate_credentials(&mc->cred);
403
341
if (ret != GNUTLS_E_SUCCESS){
404
fprintf (stderr, "GnuTLS memory error: %s\n", /* Spurious
405
warning */
342
fprintf (stderr, "GnuTLS memory error: %s\n",
406
343
safer_gnutls_strerror(ret));
407
344
gnutls_global_deinit ();
408
345
return -1;
409
346
}
410
347
411
348
if(debug){
412
fprintf(stderr, "Attempting to use OpenPGP public key %s and"
413
" secret key %s as GnuTLS credentials\n", pubkeyfilename,
414
seckeyfilename);
349
fprintf(stderr, "Attempting to use OpenPGP certificate %s"
350
" and keyfile %s as GnuTLS credentials\n", pubkeyfile,
351
seckeyfile);
415
352
}
416
353
417
354
ret = gnutls_certificate_set_openpgp_key_file
418
(mc->cred, pubkeyfilename, seckeyfilename,
419
GNUTLS_OPENPGP_FMT_BASE64);
355
(mc->cred, pubkeyfile, seckeyfile, GNUTLS_OPENPGP_FMT_BASE64);
420
356
if (ret != GNUTLS_E_SUCCESS) {
421
357
fprintf(stderr,
422
358
"Error[%d] while reading the OpenPGP key pair ('%s',"
423
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
424
fprintf(stderr, "The GnuTLS error is: %s\n",
359
" '%s')\n", ret, pubkeyfile, seckeyfile);
360
fprintf(stdout, "The GnuTLS error is: %s\n",
425
361
safer_gnutls_strerror(ret));
426
362
goto globalfail;
427
363
}
441
377
}
442
378
443
379
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
444
380
445
381
return 0;
446
382
447
383
globalfail:
448
384
449
385
gnutls_certificate_free_credentials(mc->cred);
450
386
gnutls_global_deinit();
451
gnutls_dh_params_deinit(mc->dh_params);
452
387
return -1;
388
453
389
}
454
390
455
391
static int init_gnutls_session(mandos_context *mc,
501
437
AvahiIfIndex if_index,
502
438
mandos_context *mc){
503
439
int ret, tcp_sd;
504
ssize_t sret;
505
440
union { struct sockaddr in; struct sockaddr_in6 in6; } to;
506
441
char *buffer = NULL;
507
442
char *decrypted_buffer;
528
463
perror("socket");
529
464
return -1;
530
465
}
531
466
532
467
if(debug){
533
468
if(if_indextoname((unsigned int)if_index, interface) == NULL){
534
469
perror("if_indextoname");
537
472
fprintf(stderr, "Binding to interface %s\n", interface);
538
473
}
539
474
540
memset(&to, 0, sizeof(to));
475
memset(&to,0,sizeof(to)); /* Spurious warning */
541
476
to.in6.sin6_family = AF_INET6;
542
477
/* It would be nice to have a way to detect if we were passed an
543
478
IPv4 address here. Now we assume an IPv6 address. */
573
508
perror("connect");
574
509
return -1;
575
510
}
576
511
577
512
const char *out = mandos_protocol_version;
578
513
written = 0;
579
514
while (true){
580
515
size_t out_size = strlen(out);
581
ret = (int)TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
516
ret = TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
582
517
out_size - written));
583
518
if (ret == -1){
584
519
perror("write");
597
532
}
598
533
}
599
534
}
600
535
601
536
if(debug){
602
537
fprintf(stderr, "Establishing TLS session with %s\n", ip);
603
538
}
604
539
605
540
gnutls_transport_set_ptr (session, (gnutls_transport_ptr_t) tcp_sd);
606
541
607
542
do{
608
543
ret = gnutls_handshake (session);
609
544
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
623
558
fprintf(stderr, "Retrieving pgp encrypted password from %s\n",
624
559
ip);
625
560
}
626
561
627
562
while(true){
628
563
buffer_capacity = adjustbuffer(&buffer, buffer_length,
629
564
buffer_capacity);
633
568
goto mandos_end;
634
569
}
635
570
636
sret = gnutls_record_recv(session, buffer+buffer_length,
637
BUFFER_SIZE);
638
if (sret == 0){
571
ret = gnutls_record_recv(session, buffer+buffer_length,
572
BUFFER_SIZE);
573
if (ret == 0){
639
574
break;
640
575
}
641
if (sret < 0){
642
switch(sret){
576
if (ret < 0){
577
switch(ret){
643
578
case GNUTLS_E_INTERRUPTED:
644
579
case GNUTLS_E_AGAIN:
645
580
break;
662
597
goto mandos_end;
663
598
}
664
599
} else {
665
buffer_length += (size_t) sret;
600
buffer_length += (size_t) ret;
666
601
}
667
602
}
668
603
673
608
gnutls_bye (session, GNUTLS_SHUT_RDWR);
674
609
675
610
if (buffer_length > 0){
676
decrypted_buffer_size = pgp_packet_decrypt(mc, buffer,
611
decrypted_buffer_size = pgp_packet_decrypt(buffer,
677
612
buffer_length,
678
&decrypted_buffer);
613
&decrypted_buffer,
614
keydir);
679
615
if (decrypted_buffer_size >= 0){
680
616
written = 0;
681
617
while(written < (size_t) decrypted_buffer_size){
696
632
} else {
697
633
retval = -1;
698
634
}
699
} else {
700
retval = -1;
701
635
}
702
636
703
637
/* Shutdown procedure */
704
638
705
639
mandos_end:
706
640
free(buffer);
707
ret = (int)TEMP_FAILURE_RETRY(close(tcp_sd));
708
if(ret == -1){
709
perror("close");
710
}
641
close(tcp_sd);
711
642
gnutls_deinit (session);
712
643
return retval;
713
644
}
727
658
flags,
728
659
void* userdata) {
729
660
mandos_context *mc = userdata;
730
assert(r);
661
assert(r); /* Spurious warning */
731
662
732
663
/* Called whenever a service has been resolved successfully or
733
664
timed out */
751
682
}
752
683
int ret = start_mandos_communication(ip, port, interface, mc);
753
684
if (ret == 0){
754
avahi_simple_poll_quit(mc->simple_poll);
685
exit(EXIT_SUCCESS);
755
686
}
756
687
}
757
688
}
769
700
flags,
770
701
void* userdata) {
771
702
mandos_context *mc = userdata;
772
assert(b);
703
assert(b); /* Spurious warning */
773
704
774
705
/* Called whenever a new services becomes available on the LAN or
775
706
is removed from the LAN */
809
740
}
810
741
}
811
742
743
/* Combines file name and path and returns the malloced new
744
string. some sane checks could/should be added */
745
static const char *combinepath(const char *first, const char *second){
746
size_t f_len = strlen(first);
747
size_t s_len = strlen(second);
748
char *tmp = malloc(f_len + s_len + 2);
749
if (tmp == NULL){
750
return NULL;
751
}
752
if(f_len > 0){
753
memcpy(tmp, first, f_len); /* Spurious warning */
754
}
755
tmp[f_len] = '/';
756
if(s_len > 0){
757
memcpy(tmp + f_len + 1, second, s_len); /* Spurious warning */
758
}
759
tmp[f_len + 1 + s_len] = '\0';
760
return tmp;
761
}
762
763
812
764
int main(int argc, char *argv[]){
813
765
AvahiSServiceBrowser *sb = NULL;
814
766
int error;
820
772
uid_t uid;
821
773
gid_t gid;
822
774
char *connect_to = NULL;
823
char tempdir[] = "/tmp/mandosXXXXXX";
824
775
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
825
const char *seckey = PATHDIR "/" SECKEY;
826
const char *pubkey = PATHDIR "/" PUBKEY;
827
776
const char *pubkeyfile = "pubkey.txt";
777
const char *seckeyfile = "seckey.txt";
828
778
mandos_context mc = { .simple_poll = NULL, .server = NULL,
829
.dh_bits = 1024, .priority = "SECURE256"
830
":!CTYPE-X.509:+CTYPE-OPENPGP" };
779
.dh_bits = 1024, .priority = "SECURE256"};
831
780
bool gnutls_initalized = false;
832
bool gpgme_initalized = false;
833
781
834
782
{
835
783
struct argp_option options[] = {
836
784
{ .name = "debug", .key = 128,
837
785
.doc = "Debug mode", .group = 3 },
838
786
{ .name = "connect", .key = 'c',
839
.arg = "ADDRESS:PORT",
840
.doc = "Connect directly to a specific Mandos server",
787
.arg = "IP",
788
.doc = "Connect directly to a sepcified mandos server",
841
789
.group = 1 },
842
790
{ .name = "interface", .key = 'i',
843
.arg = "NAME",
844
.doc = "Interface that will be used to search for Mandos"
845
" servers",
791
.arg = "INTERFACE",
792
.doc = "Interface that Avahi will conntect through",
793
.group = 1 },
794
{ .name = "keydir", .key = 'd',
795
.arg = "KEYDIR",
796
.doc = "Directory where the openpgp keyring is",
846
797
.group = 1 },
847
798
{ .name = "seckey", .key = 's',
848
.arg = "FILE",
849
.doc = "OpenPGP secret key file base name",
799
.arg = "SECKEY",
800
.doc = "Secret openpgp key for gnutls authentication",
850
801
.group = 1 },
851
802
{ .name = "pubkey", .key = 'p',
852
.arg = "FILE",
853
.doc = "OpenPGP public key file base name",
803
.arg = "PUBKEY",
804
.doc = "Public openpgp key for gnutls authentication",
854
805
.group = 2 },
855
806
{ .name = "dh-bits", .key = 129,
856
807
.arg = "BITS",
857
.doc = "Bit length of the prime number used in the"
858
" Diffie-Hellman key exchange",
808
.doc = "dh-bits to use in gnutls communication",
859
809
.group = 2 },
860
810
{ .name = "priority", .key = 130,
861
.arg = "STRING",
862
.doc = "GnuTLS priority string for the TLS handshake",
863
.group = 1 },
811
.arg = "PRIORITY",
812
.doc = "GNUTLS priority", .group = 1 },
864
813
{ .name = NULL }
865
814
};
815
866
816
867
817
error_t parse_opt (int key, char *arg,
868
818
struct argp_state *state) {
819
/* Get the INPUT argument from `argp_parse', which we know is
820
a pointer to our plugin list pointer. */
869
821
switch (key) {
870
case 128: /* --debug */
822
case 128:
871
823
debug = true;
872
824
break;
873
case 'c': /* --connect */
825
case 'c':
874
826
connect_to = arg;
875
827
break;
876
case 'i': /* --interface */
828
case 'i':
877
829
interface = arg;
878
830
break;
879
case 's': /* --seckey */
880
seckey = arg;
881
break;
882
case 'p': /* --pubkey */
883
pubkey = arg;
884
break;
885
case 129: /* --dh-bits */
886
ret = sscanf(arg, "%u", &mc.dh_bits);
887
if(ret == 0 or mc.dh_bits == 0){
888
fprintf(stderr, "Bad number of DH bits\n");
831
case 'd':
832
keydir = arg;
833
break;
834
case 's':
835
seckeyfile = arg;
836
break;
837
case 'p':
838
pubkeyfile = arg;
839
break;
840
case 129:
841
errno = 0;
842
mc.dh_bits = (unsigned int) strtol(arg, NULL, 10);
843
if (errno){
844
perror("strtol");
889
845
exit(EXIT_FAILURE);
890
846
}
891
847
break;
892
case 130: /* --priority */
848
case 130:
893
849
mc.priority = arg;
894
850
break;
895
851
case ARGP_KEY_ARG:
896
852
argp_usage (state);
897
case ARGP_KEY_END:
898
853
break;
854
case ARGP_KEY_END:
855
break;
899
856
default:
900
857
return ARGP_ERR_UNKNOWN;
901
858
}
902
859
return 0;
903
860
}
904
861
905
862
struct argp argp = { .options = options, .parser = parse_opt,
906
863
.args_doc = "",
907
864
.doc = "Mandos client -- Get and decrypt"
908
" passwords from a Mandos server" };
865
" passwords from mandos server" };
909
866
ret = argp_parse (&argp, argc, argv, 0, 0, NULL);
910
867
if (ret == ARGP_ERR_UNKNOWN){
911
868
fprintf(stderr, "Unknown error while parsing arguments\n");
913
870
goto end;
914
871
}
915
872
}
873
874
pubkeyfile = combinepath(keydir, pubkeyfile);
875
if (pubkeyfile == NULL){
876
perror("combinepath");
877
exitcode = EXIT_FAILURE;
878
goto end;
879
}
880
881
seckeyfile = combinepath(keydir, seckeyfile);
882
if (seckeyfile == NULL){
883
perror("combinepath");
884
exitcode = EXIT_FAILURE;
885
goto end;
886
}
887
888
ret = init_gnutls_global(&mc, pubkeyfile, seckeyfile);
889
if (ret == -1){
890
fprintf(stderr, "init_gnutls_global failed\n");
891
exitcode = EXIT_FAILURE;
892
goto end;
893
} else {
894
gnutls_initalized = true;
895
}
916
896
917
897
/* If the interface is down, bring it up */
918
898
{
922
902
exitcode = EXIT_FAILURE;
923
903
goto end;
924
904
}
925
strcpy(network.ifr_name, interface);
905
strcpy(network.ifr_name, interface); /* Spurious warning */
926
906
ret = ioctl(sd, SIOCGIFFLAGS, &network);
927
907
if(ret == -1){
928
908
perror("ioctl SIOCGIFFLAGS");
938
918
goto end;
939
919
}
940
920
}
941
ret = (int)TEMP_FAILURE_RETRY(close(sd));
942
if(ret == -1){
943
perror("close");
944
}
921
close(sd);
945
922
}
946
923
947
924
uid = getuid();
957
934
perror("setgid");
958
935
}
959
936
960
ret = init_gnutls_global(&mc, pubkey, seckey);
961
if (ret == -1){
962
fprintf(stderr, "init_gnutls_global failed\n");
963
exitcode = EXIT_FAILURE;
964
goto end;
965
} else {
966
gnutls_initalized = true;
967
}
968
969
if(mkdtemp(tempdir) == NULL){
970
perror("mkdtemp");
971
tempdir[0] = '\0';
972
goto end;
973
}
974
975
if(not init_gpgme(&mc, pubkey, seckey, tempdir)){
976
fprintf(stderr, "gpgme_initalized failed\n");
977
exitcode = EXIT_FAILURE;
978
goto end;
979
} else {
980
gpgme_initalized = true;
981
}
982
983
937
if_index = (AvahiIfIndex) if_nametoindex(interface);
984
938
if(if_index == 0){
985
939
fprintf(stderr, "No such interface: \"%s\"\n", interface);
995
949
exitcode = EXIT_FAILURE;
996
950
goto end;
997
951
}
998
uint16_t port;
999
ret = sscanf(address+1, "%" SCNu16, &port);
1000
if(ret == 0 or port == 0){
1001
fprintf(stderr, "Bad port number\n");
952
errno = 0;
953
uint16_t port = (uint16_t) strtol(address+1, NULL, 10);
954
if(errno){
955
perror("Bad port number");
1002
956
exitcode = EXIT_FAILURE;
1003
957
goto end;
1004
958
}
1028
982
exitcode = EXIT_FAILURE;
1029
983
goto end;
1030
984
}
1031
985
1032
986
{
1033
987
AvahiServerConfig config;
1034
988
/* Do not publish any local Zeroconf records */
1037
991
config.publish_addresses = 0;
1038
992
config.publish_workstation = 0;
1039
993
config.publish_domain = 0;
1040
994
1041
995
/* Allocate a new server */
1042
996
mc.server = avahi_server_new(avahi_simple_poll_get
1043
997
(mc.simple_poll), &config, NULL,
1044
998
NULL, &error);
1045
999
1046
1000
/* Free the Avahi configuration data */
1047
1001
avahi_server_config_free(&config);
1048
1002
}
1068
1022
}
1069
1023
1070
1024
/* Run the main loop */
1071
1025
1072
1026
if (debug){
1073
1027
fprintf(stderr, "Starting Avahi loop search\n");
1074
1028
}
1076
1030
avahi_simple_poll_loop(mc.simple_poll);
1077
1031
1078
1032
end:
1079
1033
1080
1034
if (debug){
1081
1035
fprintf(stderr, "%s exiting\n", argv[0]);
1082
1036
}
1087
1041
1088
1042
if (mc.server != NULL)
1089
1043
avahi_server_free(mc.server);
1090
1044
1091
1045
if (mc.simple_poll != NULL)
1092
1046
avahi_simple_poll_free(mc.simple_poll);
1093
1047
free(pubkeyfile);
1048
free(seckeyfile);
1049
1094
1050
if (gnutls_initalized){
1095
1051
gnutls_certificate_free_credentials(mc.cred);
1096
1052
gnutls_global_deinit ();
1097
gnutls_dh_params_deinit(mc.dh_params);
1098
}
1099
1100
if(gpgme_initalized){
1101
gpgme_release(mc.ctx);
1102
}
1103
1104
/* Removes the temp directory used by GPGME */
1105
if(tempdir[0] != '\0'){
1106
DIR *d;
1107
struct dirent *direntry;
1108
d = opendir(tempdir);
1109
if(d == NULL){
1110
if(errno != ENOENT){
1111
perror("opendir");
1112
}
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 and errno != ENOENT){
1139
perror("rmdir");
1140
}
1141
}
1142
1053
}
1054
1143
1055
return exitcode;
1144
1056
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0