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- Committer: Teddy Hogeborn
- Date: 2008-09-13 15:36:18 UTC
- Revision ID: teddy@fukt.bsnet.se-20080913153618-atp386q2bqj0ku99
* Makefile (install-client-nokey): Do "&&" instead of ";" to catch
errors.
* README: Kill the straight quotes. Add copyright notice.
* overview.xml: Improved wording.
errors.
* README: Kill the straight quotes. Add copyright notice.
* overview.xml: Improved wording.
- files added:
- .bzrignore
- 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
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>
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 */
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() */
44
61
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
45
SIOCSIFFLAGS */
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 */
46
74
75
/* Avahi */
76
/* All Avahi types, constants and functions
77
Avahi*, avahi_*,
78
AVAHI_* */
47
79
#include <avahi-core/core.h>
48
80
#include <avahi-core/lookup.h>
49
81
#include <avahi-core/log.h>
51
83
#include <avahi-common/malloc.h>
52
84
#include <avahi-common/error.h>
53
85
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 */
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 */
60
94
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
95
/* GPGME */
72
#include <errno.h> /* perror() */
73
#include <gpgme.h>
96
#include <gpgme.h> /* All GPGME types, constants and
97
functions:
98
gpgme_*
99
GPGME_PROTOCOL_OpenPGP,
100
GPG_ERR_NO_* */
74
101
75
102
#define BUFFER_SIZE 256
76
103
104
/*
105
#define PATHDIR "/conf/conf.d/mandos"
106
*/
107
108
#define PATHDIR "/conf/conf.d/mandos"
109
#define SECKEY "seckey.txt"
110
#define PUBKEY "pubkey.txt"
111
77
112
bool debug = false;
78
static const char *keydir = "/conf/conf.d/mandos";
79
113
static const char mandos_protocol_version[] = "1";
80
const char *argp_program_version = "mandosclient 0.9";
114
const char *argp_program_version = "mandos-client 1.0";
81
115
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
82
116
83
117
/* Used for passing in values through the Avahi callback functions */
88
122
unsigned int dh_bits;
89
123
gnutls_dh_params_t dh_params;
90
124
const char *priority;
125
gpgme_ctx_t ctx;
91
126
} mandos_context;
92
127
93
128
/*
108
143
}
109
144
110
145
/*
111
* Decrypt OpenPGP data using keyrings in HOMEDIR.
112
* Returns -1 on error
146
* Initialize GPGME.
113
147
*/
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;
148
static bool init_gpgme(mandos_context *mc, const char *seckey,
149
const char *pubkey, const char *tempdir){
150
int ret;
120
151
gpgme_error_t rc;
121
ssize_t ret;
122
size_t plaintext_capacity = 0;
123
ssize_t plaintext_length = 0;
124
152
gpgme_engine_info_t engine_info;
125
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
126
190
if (debug){
127
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
191
fprintf(stderr, "Initialize gpgme\n");
128
192
}
129
193
130
194
/* Init GPGME */
133
197
if (rc != GPG_ERR_NO_ERROR){
134
198
fprintf(stderr, "bad gpgme_engine_check_version: %s: %s\n",
135
199
gpgme_strsource(rc), gpgme_strerror(rc));
136
return -1;
200
return false;
137
201
}
138
202
139
/* Set GPGME home directory for the OpenPGP engine only */
203
/* Set GPGME home directory for the OpenPGP engine only */
140
204
rc = gpgme_get_engine_info (&engine_info);
141
205
if (rc != GPG_ERR_NO_ERROR){
142
206
fprintf(stderr, "bad gpgme_get_engine_info: %s: %s\n",
143
207
gpgme_strsource(rc), gpgme_strerror(rc));
144
return -1;
208
return false;
145
209
}
146
210
while(engine_info != NULL){
147
211
if(engine_info->protocol == GPGME_PROTOCOL_OpenPGP){
148
212
gpgme_set_engine_info(GPGME_PROTOCOL_OpenPGP,
149
engine_info->file_name, homedir);
213
engine_info->file_name, tempdir);
150
214
break;
151
215
}
152
216
engine_info = engine_info->next;
153
217
}
154
218
if(engine_info == NULL){
155
fprintf(stderr, "Could not set GPGME home dir to %s\n", homedir);
156
return -1;
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");
157
254
}
158
255
159
256
/* Create new GPGME data buffer from memory cryptotext */
174
271
return -1;
175
272
}
176
273
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
274
/* Decrypt data from the cryptotext data buffer to the plaintext
187
275
data buffer */
188
rc = gpgme_op_decrypt(ctx, dh_crypto, dh_plain);
276
rc = gpgme_op_decrypt(mc->ctx, dh_crypto, dh_plain);
189
277
if (rc != GPG_ERR_NO_ERROR){
190
278
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
191
279
gpgme_strsource(rc), gpgme_strerror(rc));
192
280
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
}
193
309
goto decrypt_end;
194
310
}
195
311
197
313
fprintf(stderr, "Decryption of OpenPGP data succeeded\n");
198
314
}
199
315
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
316
/* Seek back to the beginning of the GPGME plaintext data buffer */
230
317
if (gpgme_data_seek(dh_plain, (off_t) 0, SEEK_SET) == -1){
231
perror("pgpme_data_seek");
318
perror("gpgme_data_seek");
232
319
plaintext_length = -1;
233
320
goto decrypt_end;
234
321
}
258
345
}
259
346
plaintext_length += ret;
260
347
}
261
348
262
349
if(debug){
263
350
fprintf(stderr, "Decrypted password is: ");
264
351
for(ssize_t i = 0; i < plaintext_length; i++){
278
365
}
279
366
280
367
static const char * safer_gnutls_strerror (int value) {
281
const char *ret = gnutls_strerror (value);
368
const char *ret = gnutls_strerror (value); /* Spurious warning */
282
369
if (ret == NULL)
283
370
ret = "(unknown)";
284
371
return ret;
291
378
}
292
379
293
380
static int init_gnutls_global(mandos_context *mc,
294
const char *pubkeyfile,
295
const char *seckeyfile){
381
const char *pubkeyfilename,
382
const char *seckeyfilename){
296
383
int ret;
297
384
298
385
if(debug){
299
386
fprintf(stderr, "Initializing GnuTLS\n");
300
387
}
301
302
if ((ret = gnutls_global_init ())
303
!= GNUTLS_E_SUCCESS) {
388
389
ret = gnutls_global_init();
390
if (ret != GNUTLS_E_SUCCESS) {
304
391
fprintf (stderr, "GnuTLS global_init: %s\n",
305
392
safer_gnutls_strerror(ret));
306
393
return -1;
315
402
}
316
403
317
404
/* OpenPGP credentials */
318
if ((ret = gnutls_certificate_allocate_credentials (&mc->cred))
319
!= GNUTLS_E_SUCCESS) {
320
fprintf (stderr, "GnuTLS memory error: %s\n",
405
gnutls_certificate_allocate_credentials(&mc->cred);
406
if (ret != GNUTLS_E_SUCCESS){
407
fprintf (stderr, "GnuTLS memory error: %s\n", /* Spurious
408
warning */
321
409
safer_gnutls_strerror(ret));
322
410
gnutls_global_deinit ();
323
411
return -1;
324
412
}
325
413
326
414
if(debug){
327
fprintf(stderr, "Attempting to use OpenPGP certificate %s"
328
" and keyfile %s as GnuTLS credentials\n", pubkeyfile,
329
seckeyfile);
415
fprintf(stderr, "Attempting to use OpenPGP public key %s and"
416
" secret key %s as GnuTLS credentials\n", pubkeyfilename,
417
seckeyfilename);
330
418
}
331
419
332
420
ret = gnutls_certificate_set_openpgp_key_file
333
(mc->cred, pubkeyfile, seckeyfile, GNUTLS_OPENPGP_FMT_BASE64);
421
(mc->cred, pubkeyfilename, seckeyfilename,
422
GNUTLS_OPENPGP_FMT_BASE64);
334
423
if (ret != GNUTLS_E_SUCCESS) {
335
424
fprintf(stderr,
336
425
"Error[%d] while reading the OpenPGP key pair ('%s',"
337
" '%s')\n", ret, pubkeyfile, seckeyfile);
338
fprintf(stdout, "The GnuTLS error is: %s\n",
426
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
427
fprintf(stderr, "The GnuTLS error is: %s\n",
339
428
safer_gnutls_strerror(ret));
340
429
goto globalfail;
341
430
}
355
444
}
356
445
357
446
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
358
447
359
448
return 0;
360
449
361
450
globalfail:
362
363
gnutls_certificate_free_credentials (mc->cred);
364
gnutls_global_deinit ();
451
452
gnutls_certificate_free_credentials(mc->cred);
453
gnutls_global_deinit();
454
gnutls_dh_params_deinit(mc->dh_params);
365
455
return -1;
366
367
456
}
368
457
369
458
static int init_gnutls_session(mandos_context *mc,
432
521
}
433
522
434
523
if(debug){
435
fprintf(stderr, "Setting up a tcp connection to %s, port %d\n",
436
ip, port);
524
fprintf(stderr, "Setting up a tcp connection to %s, port %" PRIu16
525
"\n", ip, port);
437
526
}
438
527
439
528
tcp_sd = socket(PF_INET6, SOCK_STREAM, 0);
441
530
perror("socket");
442
531
return -1;
443
532
}
444
533
445
534
if(debug){
446
535
if(if_indextoname((unsigned int)if_index, interface) == NULL){
447
536
perror("if_indextoname");
450
539
fprintf(stderr, "Binding to interface %s\n", interface);
451
540
}
452
541
453
memset(&to,0,sizeof(to)); /* Spurious warning */
542
memset(&to, 0, sizeof(to));
454
543
to.in6.sin6_family = AF_INET6;
455
544
/* It would be nice to have a way to detect if we were passed an
456
545
IPv4 address here. Now we assume an IPv6 address. */
463
552
fprintf(stderr, "Bad address: %s\n", ip);
464
553
return -1;
465
554
}
466
to.in6.sin6_port = htons(port); /* Spurious warning */
555
to.in6.sin6_port = htons(port); /* Spurious warning */
467
556
468
557
to.in6.sin6_scope_id = (uint32_t)if_index;
469
558
470
559
if(debug){
471
fprintf(stderr, "Connection to: %s, port %d\n", ip, port);
560
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
561
port);
472
562
char addrstr[INET6_ADDRSTRLEN] = "";
473
563
if(inet_ntop(to.in6.sin6_family, &(to.in6.sin6_addr), addrstr,
474
564
sizeof(addrstr)) == NULL){
485
575
perror("connect");
486
576
return -1;
487
577
}
488
578
489
579
const char *out = mandos_protocol_version;
490
580
written = 0;
491
581
while (true){
509
599
}
510
600
}
511
601
}
512
602
513
603
if(debug){
514
604
fprintf(stderr, "Establishing TLS session with %s\n", ip);
515
605
}
516
606
517
607
gnutls_transport_set_ptr (session, (gnutls_transport_ptr_t) tcp_sd);
518
608
519
ret = gnutls_handshake (session);
609
do{
610
ret = gnutls_handshake (session);
611
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
520
612
521
613
if (ret != GNUTLS_E_SUCCESS){
522
614
if(debug){
533
625
fprintf(stderr, "Retrieving pgp encrypted password from %s\n",
534
626
ip);
535
627
}
536
628
537
629
while(true){
538
630
buffer_capacity = adjustbuffer(&buffer, buffer_length,
539
631
buffer_capacity);
554
646
case GNUTLS_E_AGAIN:
555
647
break;
556
648
case GNUTLS_E_REHANDSHAKE:
557
ret = gnutls_handshake (session);
649
do{
650
ret = gnutls_handshake (session);
651
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
558
652
if (ret < 0){
559
653
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
560
654
gnutls_perror (ret);
581
675
gnutls_bye (session, GNUTLS_SHUT_RDWR);
582
676
583
677
if (buffer_length > 0){
584
decrypted_buffer_size = pgp_packet_decrypt(buffer,
678
decrypted_buffer_size = pgp_packet_decrypt(mc, buffer,
585
679
buffer_length,
586
&decrypted_buffer,
587
keydir);
680
&decrypted_buffer);
588
681
if (decrypted_buffer_size >= 0){
589
682
written = 0;
590
683
while(written < (size_t) decrypted_buffer_size){
605
698
} else {
606
699
retval = -1;
607
700
}
701
} else {
702
retval = -1;
608
703
}
609
704
610
705
/* Shutdown procedure */
611
706
612
707
mandos_end:
613
708
free(buffer);
614
close(tcp_sd);
709
ret = TEMP_FAILURE_RETRY(close(tcp_sd));
710
if(ret == -1){
711
perror("close");
712
}
615
713
gnutls_deinit (session);
616
714
return retval;
617
715
}
631
729
flags,
632
730
void* userdata) {
633
731
mandos_context *mc = userdata;
634
assert(r); /* Spurious warning */
732
assert(r);
635
733
636
734
/* Called whenever a service has been resolved successfully or
637
735
timed out */
649
747
char ip[AVAHI_ADDRESS_STR_MAX];
650
748
avahi_address_snprint(ip, sizeof(ip), address);
651
749
if(debug){
652
fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %d) on"
653
" port %d\n", name, host_name, ip, interface, port);
750
fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %"
751
PRIu16 ") on port %d\n", name, host_name, ip,
752
interface, port);
654
753
}
655
754
int ret = start_mandos_communication(ip, port, interface, mc);
656
755
if (ret == 0){
657
exit(EXIT_SUCCESS);
756
avahi_simple_poll_quit(mc->simple_poll);
658
757
}
659
758
}
660
759
}
672
771
flags,
673
772
void* userdata) {
674
773
mandos_context *mc = userdata;
675
assert(b); /* Spurious warning */
774
assert(b);
676
775
677
776
/* Called whenever a new services becomes available on the LAN or
678
777
is removed from the LAN */
712
811
}
713
812
}
714
813
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
814
int main(int argc, char *argv[]){
737
815
AvahiSServiceBrowser *sb = NULL;
738
816
int error;
744
822
uid_t uid;
745
823
gid_t gid;
746
824
char *connect_to = NULL;
825
char tempdir[] = "/tmp/mandosXXXXXX";
747
826
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
748
const char *pubkeyfile = "pubkey.txt";
749
const char *seckeyfile = "seckey.txt";
827
const char *seckey = PATHDIR "/" SECKEY;
828
const char *pubkey = PATHDIR "/" PUBKEY;
829
750
830
mandos_context mc = { .simple_poll = NULL, .server = NULL,
751
.dh_bits = 1024, .priority = "SECURE256"};
831
.dh_bits = 1024, .priority = "SECURE256"
832
":!CTYPE-X.509:+CTYPE-OPENPGP" };
752
833
bool gnutls_initalized = false;
834
bool gpgme_initalized = false;
753
835
754
836
{
755
837
struct argp_option options[] = {
756
838
{ .name = "debug", .key = 128,
757
839
.doc = "Debug mode", .group = 3 },
758
840
{ .name = "connect", .key = 'c',
759
.arg = "IP",
760
.doc = "Connect directly to a sepcified mandos server",
841
.arg = "ADDRESS:PORT",
842
.doc = "Connect directly to a specific Mandos server",
761
843
.group = 1 },
762
844
{ .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",
845
.arg = "NAME",
846
.doc = "Interface that will be used to search for Mandos"
847
" servers",
769
848
.group = 1 },
770
849
{ .name = "seckey", .key = 's',
771
.arg = "SECKEY",
772
.doc = "Secret openpgp key for gnutls authentication",
850
.arg = "FILE",
851
.doc = "OpenPGP secret key file base name",
773
852
.group = 1 },
774
853
{ .name = "pubkey", .key = 'p',
775
.arg = "PUBKEY",
776
.doc = "Public openpgp key for gnutls authentication",
854
.arg = "FILE",
855
.doc = "OpenPGP public key file base name",
777
856
.group = 2 },
778
857
{ .name = "dh-bits", .key = 129,
779
858
.arg = "BITS",
780
.doc = "dh-bits to use in gnutls communication",
859
.doc = "Bit length of the prime number used in the"
860
" Diffie-Hellman key exchange",
781
861
.group = 2 },
782
862
{ .name = "priority", .key = 130,
783
.arg = "PRIORITY",
784
.doc = "GNUTLS priority", .group = 1 },
863
.arg = "STRING",
864
.doc = "GnuTLS priority string for the TLS handshake",
865
.group = 1 },
785
866
{ .name = NULL }
786
867
};
787
788
868
789
869
error_t parse_opt (int key, char *arg,
790
870
struct argp_state *state) {
791
871
/* Get the INPUT argument from `argp_parse', which we know is
792
872
a pointer to our plugin list pointer. */
793
873
switch (key) {
794
case 128:
874
case 128: /* --debug */
795
875
debug = true;
796
876
break;
797
case 'c':
877
case 'c': /* --connect */
798
878
connect_to = arg;
799
879
break;
800
case 'i':
880
case 'i': /* --interface */
801
881
interface = arg;
802
882
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:
883
case 's': /* --seckey */
884
seckey = arg;
885
break;
886
case 'p': /* --pubkey */
887
pubkey = arg;
888
break;
889
case 129: /* --dh-bits */
813
890
errno = 0;
814
891
mc.dh_bits = (unsigned int) strtol(arg, NULL, 10);
815
892
if (errno){
817
894
exit(EXIT_FAILURE);
818
895
}
819
896
break;
820
case 130:
897
case 130: /* --priority */
821
898
mc.priority = arg;
822
899
break;
823
900
case ARGP_KEY_ARG:
824
901
argp_usage (state);
902
case ARGP_KEY_END:
825
903
break;
826
case ARGP_KEY_END:
827
break;
828
904
default:
829
905
return ARGP_ERR_UNKNOWN;
830
906
}
831
907
return 0;
832
908
}
833
909
834
910
struct argp argp = { .options = options, .parser = parse_opt,
835
911
.args_doc = "",
836
912
.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
913
" passwords from a Mandos server" };
914
ret = argp_parse (&argp, argc, argv, 0, 0, NULL);
915
if (ret == ARGP_ERR_UNKNOWN){
916
fprintf(stderr, "Unknown error while parsing arguments\n");
917
exitcode = EXIT_FAILURE;
918
goto end;
919
}
920
}
921
922
/* If the interface is down, bring it up */
923
{
924
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
925
if(sd < 0) {
926
perror("socket");
927
exitcode = EXIT_FAILURE;
928
goto end;
929
}
930
strcpy(network.ifr_name, interface);
931
ret = ioctl(sd, SIOCGIFFLAGS, &network);
932
if(ret == -1){
933
perror("ioctl SIOCGIFFLAGS");
934
exitcode = EXIT_FAILURE;
935
goto end;
936
}
937
if((network.ifr_flags & IFF_UP) == 0){
938
network.ifr_flags |= IFF_UP;
939
ret = ioctl(sd, SIOCSIFFLAGS, &network);
940
if(ret == -1){
941
perror("ioctl SIOCSIFFLAGS");
942
exitcode = EXIT_FAILURE;
943
goto end;
944
}
945
}
946
ret = TEMP_FAILURE_RETRY(close(sd));
947
if(ret == -1){
948
perror("close");
949
}
950
}
951
862
952
uid = getuid();
863
953
gid = getgid();
864
954
865
955
ret = setuid(uid);
866
956
if (ret == -1){
867
957
perror("setuid");
872
962
perror("setgid");
873
963
}
874
964
965
ret = init_gnutls_global(&mc, pubkey, seckey);
966
if (ret == -1){
967
fprintf(stderr, "init_gnutls_global failed\n");
968
exitcode = EXIT_FAILURE;
969
goto end;
970
} else {
971
gnutls_initalized = true;
972
}
973
974
if(mkdtemp(tempdir) == NULL){
975
perror("mkdtemp");
976
tempdir[0] = '\0';
977
goto end;
978
}
979
980
if(not init_gpgme(&mc, pubkey, seckey, tempdir)){
981
fprintf(stderr, "gpgme_initalized failed\n");
982
exitcode = EXIT_FAILURE;
983
goto end;
984
} else {
985
gpgme_initalized = true;
986
}
987
875
988
if_index = (AvahiIfIndex) if_nametoindex(interface);
876
989
if(if_index == 0){
877
990
fprintf(stderr, "No such interface: \"%s\"\n", interface);
905
1018
goto end;
906
1019
}
907
1020
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
1021
if (not debug){
936
1022
avahi_set_log_function(empty_log);
937
1023
}
947
1033
exitcode = EXIT_FAILURE;
948
1034
goto end;
949
1035
}
950
1036
951
1037
{
952
1038
AvahiServerConfig config;
953
1039
/* Do not publish any local Zeroconf records */
956
1042
config.publish_addresses = 0;
957
1043
config.publish_workstation = 0;
958
1044
config.publish_domain = 0;
959
1045
960
1046
/* Allocate a new server */
961
1047
mc.server = avahi_server_new(avahi_simple_poll_get
962
1048
(mc.simple_poll), &config, NULL,
963
1049
NULL, &error);
964
1050
965
1051
/* Free the Avahi configuration data */
966
1052
avahi_server_config_free(&config);
967
1053
}
987
1073
}
988
1074
989
1075
/* Run the main loop */
990
1076
991
1077
if (debug){
992
1078
fprintf(stderr, "Starting Avahi loop search\n");
993
1079
}
995
1081
avahi_simple_poll_loop(mc.simple_poll);
996
1082
997
1083
end:
998
1084
999
1085
if (debug){
1000
1086
fprintf(stderr, "%s exiting\n", argv[0]);
1001
1087
}
1006
1092
1007
1093
if (mc.server != NULL)
1008
1094
avahi_server_free(mc.server);
1009
1095
1010
1096
if (mc.simple_poll != NULL)
1011
1097
avahi_simple_poll_free(mc.simple_poll);
1012
free(pubkeyfile);
1013
free(seckeyfile);
1014
1098
1015
1099
if (gnutls_initalized){
1016
gnutls_certificate_free_credentials (mc.cred);
1100
gnutls_certificate_free_credentials(mc.cred);
1017
1101
gnutls_global_deinit ();
1018
}
1019
1102
gnutls_dh_params_deinit(mc.dh_params);
1103
}
1104
1105
if(gpgme_initalized){
1106
gpgme_release(mc.ctx);
1107
}
1108
1109
/* Removes the temp directory used by GPGME */
1110
if(tempdir[0] != '\0'){
1111
DIR *d;
1112
struct dirent *direntry;
1113
d = opendir(tempdir);
1114
if(d == NULL){
1115
perror("opendir");
1116
} else {
1117
while(true){
1118
direntry = readdir(d);
1119
if(direntry == NULL){
1120
break;
1121
}
1122
if (direntry->d_type == DT_REG){
1123
char *fullname = NULL;
1124
ret = asprintf(&fullname, "%s/%s", tempdir,
1125
direntry->d_name);
1126
if(ret < 0){
1127
perror("asprintf");
1128
continue;
1129
}
1130
ret = unlink(fullname);
1131
if(ret == -1){
1132
fprintf(stderr, "unlink(\"%s\"): %s",
1133
fullname, strerror(errno));
1134
}
1135
free(fullname);
1136
}
1137
}
1138
closedir(d);
1139
}
1140
ret = rmdir(tempdir);
1141
if(ret == -1){
1142
perror("rmdir");
1143
}
1144
}
1145
1020
1146
return exitcode;
1021
1147
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0