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- Committer: Teddy Hogeborn
- Date: 2008-08-07 22:30:45 UTC
- Revision ID: teddy@fukt.bsnet.se-20080807223045-58y7vw4bcqlmesv5
* network-protocol.txt: Flip table.
- files added:
- network-protocol.txt
- files removed:
- .bzrignore
- files renamed:
- plugin-runner.c => mandos-client.c
- 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 "pupkey.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 = "password-request 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
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
125
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 */
195
131
gpgme_check_version(NULL);
196
132
rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
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
203
/* Set GPGME home directory for the OpenPGP engine only */
138
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
231
perror("pgpme_data_seek");
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();
362
363
gnutls_certificate_free_credentials (mc->cred);
364
gnutls_global_deinit ();
454
365
return -1;
366
455
367
}
456
368
457
369
static int init_gnutls_session(mandos_context *mc,
520
432
}
521
433
522
434
if(debug){
523
fprintf(stderr, "Setting up a tcp connection to %s, port %" PRIu16
524
"\n", ip, port);
435
fprintf(stderr, "Setting up a tcp connection to %s, port %d\n",
436
ip, port);
525
437
}
526
438
527
439
tcp_sd = socket(PF_INET6, SOCK_STREAM, 0);
529
441
perror("socket");
530
442
return -1;
531
443
}
532
444
533
445
if(debug){
534
446
if(if_indextoname((unsigned int)if_index, interface) == NULL){
535
447
perror("if_indextoname");
538
450
fprintf(stderr, "Binding to interface %s\n", interface);
539
451
}
540
452
541
memset(&to, 0, sizeof(to));
453
memset(&to,0,sizeof(to)); /* Spurious warning */
542
454
to.in6.sin6_family = AF_INET6;
543
455
/* It would be nice to have a way to detect if we were passed an
544
456
IPv4 address here. Now we assume an IPv6 address. */
551
463
fprintf(stderr, "Bad address: %s\n", ip);
552
464
return -1;
553
465
}
554
to.in6.sin6_port = htons(port); /* Spurious warning */
466
to.in6.sin6_port = htons(port); /* Spurious warning */
555
467
556
468
to.in6.sin6_scope_id = (uint32_t)if_index;
557
469
558
470
if(debug){
559
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
560
port);
471
fprintf(stderr, "Connection to: %s, port %d\n", ip, port);
561
472
char addrstr[INET6_ADDRSTRLEN] = "";
562
473
if(inet_ntop(to.in6.sin6_family, &(to.in6.sin6_addr), addrstr,
563
474
sizeof(addrstr)) == NULL){
574
485
perror("connect");
575
486
return -1;
576
487
}
577
488
578
489
const char *out = mandos_protocol_version;
579
490
written = 0;
580
491
while (true){
598
509
}
599
510
}
600
511
}
601
512
602
513
if(debug){
603
514
fprintf(stderr, "Establishing TLS session with %s\n", ip);
604
515
}
605
516
606
517
gnutls_transport_set_ptr (session, (gnutls_transport_ptr_t) tcp_sd);
607
518
608
do{
609
ret = gnutls_handshake (session);
610
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
519
ret = gnutls_handshake (session);
611
520
612
521
if (ret != GNUTLS_E_SUCCESS){
613
522
if(debug){
624
533
fprintf(stderr, "Retrieving pgp encrypted password from %s\n",
625
534
ip);
626
535
}
627
536
628
537
while(true){
629
538
buffer_capacity = adjustbuffer(&buffer, buffer_length,
630
539
buffer_capacity);
645
554
case GNUTLS_E_AGAIN:
646
555
break;
647
556
case GNUTLS_E_REHANDSHAKE:
648
do{
649
ret = gnutls_handshake (session);
650
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
557
ret = gnutls_handshake (session);
651
558
if (ret < 0){
652
559
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
653
560
gnutls_perror (ret);
674
581
gnutls_bye (session, GNUTLS_SHUT_RDWR);
675
582
676
583
if (buffer_length > 0){
677
decrypted_buffer_size = pgp_packet_decrypt(mc, buffer,
584
decrypted_buffer_size = pgp_packet_decrypt(buffer,
678
585
buffer_length,
679
&decrypted_buffer);
586
&decrypted_buffer,
587
keydir);
680
588
if (decrypted_buffer_size >= 0){
681
589
written = 0;
682
590
while(written < (size_t) decrypted_buffer_size){
697
605
} else {
698
606
retval = -1;
699
607
}
700
} else {
701
retval = -1;
702
608
}
703
609
704
610
/* Shutdown procedure */
705
611
706
612
mandos_end:
707
613
free(buffer);
708
ret = TEMP_FAILURE_RETRY(close(tcp_sd));
709
if(ret == -1){
710
perror("close");
711
}
614
close(tcp_sd);
712
615
gnutls_deinit (session);
713
616
return retval;
714
617
}
728
631
flags,
729
632
void* userdata) {
730
633
mandos_context *mc = userdata;
731
assert(r);
634
assert(r); /* Spurious warning */
732
635
733
636
/* Called whenever a service has been resolved successfully or
734
637
timed out */
746
649
char ip[AVAHI_ADDRESS_STR_MAX];
747
650
avahi_address_snprint(ip, sizeof(ip), address);
748
651
if(debug){
749
fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %"
750
PRIu16 ") on port %d\n", name, host_name, ip,
751
interface, port);
652
fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %d) on"
653
" port %d\n", name, host_name, ip, interface, port);
752
654
}
753
655
int ret = start_mandos_communication(ip, port, interface, mc);
754
656
if (ret == 0){
755
avahi_simple_poll_quit(mc->simple_poll);
657
exit(EXIT_SUCCESS);
756
658
}
757
659
}
758
660
}
770
672
flags,
771
673
void* userdata) {
772
674
mandos_context *mc = userdata;
773
assert(b);
675
assert(b); /* Spurious warning */
774
676
775
677
/* Called whenever a new services becomes available on the LAN or
776
678
is removed from the LAN */
810
712
}
811
713
}
812
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
813
736
int main(int argc, char *argv[]){
814
737
AvahiSServiceBrowser *sb = NULL;
815
738
int error;
821
744
uid_t uid;
822
745
gid_t gid;
823
746
char *connect_to = NULL;
824
char tempdir[] = "/tmp/mandosXXXXXX";
825
747
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
826
const char *seckey = PATHDIR "/" SECKEY;
827
const char *pubkey = PATHDIR "/" PUBKEY;
828
748
const char *pubkeyfile = "pubkey.txt";
749
const char *seckeyfile = "seckey.txt";
829
750
mandos_context mc = { .simple_poll = NULL, .server = NULL,
830
.dh_bits = 1024, .priority = "SECURE256"
831
":!CTYPE-X.509:+CTYPE-OPENPGP" };
751
.dh_bits = 1024, .priority = "SECURE256"};
832
752
bool gnutls_initalized = false;
833
bool pgpme_initalized = false;
834
753
835
754
{
836
755
struct argp_option options[] = {
837
756
{ .name = "debug", .key = 128,
838
757
.doc = "Debug mode", .group = 3 },
839
758
{ .name = "connect", .key = 'c',
840
.arg = "ADDRESS:PORT",
841
.doc = "Connect directly to a specific Mandos server",
759
.arg = "IP",
760
.doc = "Connect directly to a sepcified mandos server",
842
761
.group = 1 },
843
762
{ .name = "interface", .key = 'i',
844
.arg = "NAME",
845
.doc = "Interface that will be used to search for Mandos"
846
" 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",
847
769
.group = 1 },
848
770
{ .name = "seckey", .key = 's',
849
.arg = "FILE",
850
.doc = "OpenPGP secret key file base name",
771
.arg = "SECKEY",
772
.doc = "Secret openpgp key for gnutls authentication",
851
773
.group = 1 },
852
774
{ .name = "pubkey", .key = 'p',
853
.arg = "FILE",
854
.doc = "OpenPGP public key file base name",
775
.arg = "PUBKEY",
776
.doc = "Public openpgp key for gnutls authentication",
855
777
.group = 2 },
856
778
{ .name = "dh-bits", .key = 129,
857
779
.arg = "BITS",
858
.doc = "Bit length of the prime number used in the"
859
" Diffie-Hellman key exchange",
780
.doc = "dh-bits to use in gnutls communication",
860
781
.group = 2 },
861
782
{ .name = "priority", .key = 130,
862
.arg = "STRING",
863
.doc = "GnuTLS priority string for the TLS handshake",
864
.group = 1 },
783
.arg = "PRIORITY",
784
.doc = "GNUTLS priority", .group = 1 },
865
785
{ .name = NULL }
866
786
};
787
867
788
868
789
error_t parse_opt (int key, char *arg,
869
790
struct argp_state *state) {
870
791
/* Get the INPUT argument from `argp_parse', which we know is
871
792
a pointer to our plugin list pointer. */
872
793
switch (key) {
873
case 128: /* --debug */
794
case 128:
874
795
debug = true;
875
796
break;
876
case 'c': /* --connect */
797
case 'c':
877
798
connect_to = arg;
878
799
break;
879
case 'i': /* --interface */
800
case 'i':
880
801
interface = arg;
881
802
break;
882
case 's': /* --seckey */
883
seckey = arg;
884
break;
885
case 'p': /* --pubkey */
886
pubkey = arg;
887
break;
888
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:
889
813
errno = 0;
890
814
mc.dh_bits = (unsigned int) strtol(arg, NULL, 10);
891
815
if (errno){
893
817
exit(EXIT_FAILURE);
894
818
}
895
819
break;
896
case 130: /* --priority */
820
case 130:
897
821
mc.priority = arg;
898
822
break;
899
823
case ARGP_KEY_ARG:
900
824
argp_usage (state);
901
case ARGP_KEY_END:
902
825
break;
826
case ARGP_KEY_END:
827
break;
903
828
default:
904
829
return ARGP_ERR_UNKNOWN;
905
830
}
906
831
return 0;
907
832
}
908
833
909
834
struct argp argp = { .options = options, .parser = parse_opt,
910
835
.args_doc = "",
911
836
.doc = "Mandos client -- Get and decrypt"
912
" passwords from a Mandos server" };
913
ret = argp_parse (&argp, argc, argv, 0, 0, NULL);
914
if (ret == ARGP_ERR_UNKNOWN){
915
fprintf(stderr, "Unknown error while parsing arguments\n");
916
exitcode = EXIT_FAILURE;
917
goto end;
918
}
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;
919
846
}
920
847
921
ret = init_gnutls_global(&mc, pubkey, seckey);
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);
922
855
if (ret == -1){
923
fprintf(stderr, "init_gnutls_global failed\n");
924
exitcode = EXIT_FAILURE;
856
fprintf(stderr, "init_gnutls_global\n");
925
857
goto end;
926
858
} else {
927
859
gnutls_initalized = true;
928
860
}
929
861
930
if(mkdtemp(tempdir) == NULL){
931
perror("mkdtemp");
932
tempdir[0] = '\0';
933
goto end;
934
}
935
936
if(not init_gpgme(&mc, pubkey, seckey, tempdir)){
937
fprintf(stderr, "pgpme_initalized failed\n");
938
exitcode = EXIT_FAILURE;
939
goto end;
940
} else {
941
pgpme_initalized = true;
942
}
943
944
/* If the interface is down, bring it up */
945
{
946
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
947
if(sd < 0) {
948
perror("socket");
949
exitcode = EXIT_FAILURE;
950
goto end;
951
}
952
strcpy(network.ifr_name, interface);
953
ret = ioctl(sd, SIOCGIFFLAGS, &network);
954
if(ret == -1){
955
perror("ioctl SIOCGIFFLAGS");
956
exitcode = EXIT_FAILURE;
957
goto end;
958
}
959
if((network.ifr_flags & IFF_UP) == 0){
960
network.ifr_flags |= IFF_UP;
961
ret = ioctl(sd, SIOCSIFFLAGS, &network);
962
if(ret == -1){
963
perror("ioctl SIOCSIFFLAGS");
964
exitcode = EXIT_FAILURE;
965
goto end;
966
}
967
}
968
ret = TEMP_FAILURE_RETRY(close(sd));
969
if(ret == -1){
970
perror("close");
971
}
972
}
973
974
862
uid = getuid();
975
863
gid = getgid();
976
864
977
865
ret = setuid(uid);
978
866
if (ret == -1){
979
867
perror("setuid");
1017
905
goto end;
1018
906
}
1019
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
1020
935
if (not debug){
1021
936
avahi_set_log_function(empty_log);
1022
937
}
1032
947
exitcode = EXIT_FAILURE;
1033
948
goto end;
1034
949
}
1035
950
1036
951
{
1037
952
AvahiServerConfig config;
1038
953
/* Do not publish any local Zeroconf records */
1041
956
config.publish_addresses = 0;
1042
957
config.publish_workstation = 0;
1043
958
config.publish_domain = 0;
1044
959
1045
960
/* Allocate a new server */
1046
961
mc.server = avahi_server_new(avahi_simple_poll_get
1047
962
(mc.simple_poll), &config, NULL,
1048
963
NULL, &error);
1049
964
1050
965
/* Free the Avahi configuration data */
1051
966
avahi_server_config_free(&config);
1052
967
}
1072
987
}
1073
988
1074
989
/* Run the main loop */
1075
990
1076
991
if (debug){
1077
992
fprintf(stderr, "Starting Avahi loop search\n");
1078
993
}
1080
995
avahi_simple_poll_loop(mc.simple_poll);
1081
996
1082
997
end:
1083
998
1084
999
if (debug){
1085
1000
fprintf(stderr, "%s exiting\n", argv[0]);
1086
1001
}
1091
1006
1092
1007
if (mc.server != NULL)
1093
1008
avahi_server_free(mc.server);
1094
1009
1095
1010
if (mc.simple_poll != NULL)
1096
1011
avahi_simple_poll_free(mc.simple_poll);
1097
1012
free(pubkeyfile);
1013
free(seckeyfile);
1014
1098
1015
if (gnutls_initalized){
1099
gnutls_certificate_free_credentials(mc.cred);
1016
gnutls_certificate_free_credentials (mc.cred);
1100
1017
gnutls_global_deinit ();
1101
1018
}
1102
1103
if(pgpme_initalized){
1104
gpgme_release(mc.ctx);
1105
}
1106
1107
/* Removes the temp directory used by GPGME */
1108
if(tempdir[0] != '\0'){
1109
DIR *d;
1110
struct dirent *direntry;
1111
d = opendir(tempdir);
1112
if(d == NULL){
1113
perror("opendir");
1114
} else {
1115
while(true){
1116
direntry = readdir(d);
1117
if(direntry == NULL){
1118
break;
1119
}
1120
if (direntry->d_type == DT_REG){
1121
char *fullname = NULL;
1122
ret = asprintf(&fullname, "%s/%s", tempdir,
1123
direntry->d_name);
1124
if(ret < 0){
1125
perror("asprintf");
1126
continue;
1127
}
1128
ret = unlink(fullname);
1129
if(ret == -1){
1130
fprintf(stderr, "unlink(\"%s\"): %s",
1131
fullname, strerror(errno));
1132
}
1133
free(fullname);
1134
}
1135
}
1136
}
1137
ret = rmdir(tempdir);
1138
if(ret == -1){
1139
perror("rmdir");
1140
}
1141
}
1142
1019
1143
1020
return exitcode;
1144
1021
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0