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- Committer: Björn Påhlsson
- Date: 2008-09-03 21:18:05 UTC
- mto: (237.7.1 mandos) (24.1.154 mandos)
- mto: This revision was merged to the branch mainline in revision 153.
- Revision ID: belorn@braxen-20080903211805-2evlp1ooipx0rr8f
added some comments about security
- files added:
- .bzrignore
- files removed:
- network-protocol.txt
- files renamed:
- mandos-client.c => plugin-runner.c
- mandos-client.xml => plugin-runner.xml
- 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() */
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 */
53
#include <inttypes.h> /* PRIu16 */
50
uid_t, gid_t, open(), opendir(), DIR */
51
#include <sys/stat.h> /* open() */
54
52
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
55
53
struct in6_addr, inet_pton(),
56
54
connect() */
55
#include <fcntl.h> /* open() */
56
#include <dirent.h> /* opendir(), struct dirent, readdir() */
57
#include <inttypes.h> /* PRIu16 */
57
58
#include <assert.h> /* assert() */
58
59
#include <errno.h> /* perror(), errno */
59
60
#include <time.h> /* time() */
60
61
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
61
62
SIOCSIFFLAGS, if_indextoname(),
62
63
if_nametoindex(), IF_NAMESIZE */
64
#include <netinet/in.h>
63
65
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
64
66
getuid(), getgid(), setuid(),
65
67
setgid() */
66
#include <netinet/in.h>
67
68
#include <arpa/inet.h> /* inet_pton(), htons */
68
69
#include <iso646.h> /* not, and */
69
70
#include <argp.h> /* struct argp_option, error_t, struct
83
84
#include <avahi-common/error.h>
84
85
85
86
/* GnuTLS */
86
#include <gnutls/gnutls.h> /* All GnuTLS types, constants and functions
87
#include <gnutls/gnutls.h> /* All GnuTLS types, constants and
88
functions:
87
89
gnutls_*
88
90
init_gnutls_session(),
89
91
GNUTLS_* */
91
93
GNUTLS_OPENPGP_FMT_BASE64 */
92
94
93
95
/* GPGME */
94
#include <gpgme.h> /* All GPGME types, constants and functions
96
#include <gpgme.h> /* All GPGME types, constants and
97
functions:
95
98
gpgme_*
96
99
GPGME_PROTOCOL_OpenPGP,
97
100
GPG_ERR_NO_* */
98
101
99
102
#define BUFFER_SIZE 256
100
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 "pupkey.txt"
111
101
112
bool debug = false;
102
static const char *keydir = "/conf/conf.d/mandos";
103
113
static const char mandos_protocol_version[] = "1";
104
114
const char *argp_program_version = "password-request 1.0";
105
115
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
112
122
unsigned int dh_bits;
113
123
gnutls_dh_params_t dh_params;
114
124
const char *priority;
125
gpgme_ctx_t ctx;
115
126
} mandos_context;
116
127
117
128
/*
132
143
}
133
144
134
145
/*
135
* Decrypt OpenPGP data using keyrings in HOMEDIR.
136
* Returns -1 on error
146
* Initialize GPGME.
137
147
*/
138
static ssize_t pgp_packet_decrypt (const char *cryptotext,
139
size_t crypto_size,
140
char **plaintext,
141
const char *homedir){
142
gpgme_data_t dh_crypto, dh_plain;
143
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;
144
151
gpgme_error_t rc;
145
ssize_t ret;
146
size_t plaintext_capacity = 0;
147
ssize_t plaintext_length = 0;
148
152
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
}
149
189
150
190
if (debug){
151
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
191
fprintf(stderr, "Initialize gpgme\n");
152
192
}
153
193
154
194
/* Init GPGME */
155
195
gpgme_check_version(NULL);
156
196
rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
157
197
if (rc != GPG_ERR_NO_ERROR){
158
198
fprintf(stderr, "bad gpgme_engine_check_version: %s: %s\n",
159
199
gpgme_strsource(rc), gpgme_strerror(rc));
160
return -1;
200
return false;
161
201
}
162
163
/* Set GPGME home directory for the OpenPGP engine only */
202
203
/* Set GPGME home directory for the OpenPGP engine only */
164
204
rc = gpgme_get_engine_info (&engine_info);
165
205
if (rc != GPG_ERR_NO_ERROR){
166
206
fprintf(stderr, "bad gpgme_get_engine_info: %s: %s\n",
167
207
gpgme_strsource(rc), gpgme_strerror(rc));
168
return -1;
208
return false;
169
209
}
170
210
while(engine_info != NULL){
171
211
if(engine_info->protocol == GPGME_PROTOCOL_OpenPGP){
172
212
gpgme_set_engine_info(GPGME_PROTOCOL_OpenPGP,
173
engine_info->file_name, homedir);
213
engine_info->file_name, tempdir);
174
214
break;
175
215
}
176
216
engine_info = engine_info->next;
177
217
}
178
218
if(engine_info == NULL){
179
fprintf(stderr, "Could not set GPGME home dir to %s\n", homedir);
180
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");
181
254
}
182
255
183
256
/* Create new GPGME data buffer from memory cryptotext */
198
271
return -1;
199
272
}
200
273
201
/* Create new GPGME "context" */
202
rc = gpgme_new(&ctx);
203
if (rc != GPG_ERR_NO_ERROR){
204
fprintf(stderr, "bad gpgme_new: %s: %s\n",
205
gpgme_strsource(rc), gpgme_strerror(rc));
206
plaintext_length = -1;
207
goto decrypt_end;
208
}
209
210
274
/* Decrypt data from the cryptotext data buffer to the plaintext
211
275
data buffer */
212
rc = gpgme_op_decrypt(ctx, dh_crypto, dh_plain);
276
rc = gpgme_op_decrypt(mc->ctx, dh_crypto, dh_plain);
213
277
if (rc != GPG_ERR_NO_ERROR){
214
278
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
215
279
gpgme_strsource(rc), gpgme_strerror(rc));
216
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
}
217
309
goto decrypt_end;
218
310
}
219
311
221
313
fprintf(stderr, "Decryption of OpenPGP data succeeded\n");
222
314
}
223
315
224
if (debug){
225
gpgme_decrypt_result_t result;
226
result = gpgme_op_decrypt_result(ctx);
227
if (result == NULL){
228
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
229
} else {
230
fprintf(stderr, "Unsupported algorithm: %s\n",
231
result->unsupported_algorithm);
232
fprintf(stderr, "Wrong key usage: %u\n",
233
result->wrong_key_usage);
234
if(result->file_name != NULL){
235
fprintf(stderr, "File name: %s\n", result->file_name);
236
}
237
gpgme_recipient_t recipient;
238
recipient = result->recipients;
239
if(recipient){
240
while(recipient != NULL){
241
fprintf(stderr, "Public key algorithm: %s\n",
242
gpgme_pubkey_algo_name(recipient->pubkey_algo));
243
fprintf(stderr, "Key ID: %s\n", recipient->keyid);
244
fprintf(stderr, "Secret key available: %s\n",
245
recipient->status == GPG_ERR_NO_SECKEY
246
? "No" : "Yes");
247
recipient = recipient->next;
248
}
249
}
250
}
251
}
252
253
316
/* Seek back to the beginning of the GPGME plaintext data buffer */
254
317
if (gpgme_data_seek(dh_plain, (off_t) 0, SEEK_SET) == -1){
255
318
perror("pgpme_data_seek");
282
345
}
283
346
plaintext_length += ret;
284
347
}
285
348
286
349
if(debug){
287
350
fprintf(stderr, "Decrypted password is: ");
288
351
for(ssize_t i = 0; i < plaintext_length; i++){
302
365
}
303
366
304
367
static const char * safer_gnutls_strerror (int value) {
305
const char *ret = gnutls_strerror (value);
368
const char *ret = gnutls_strerror (value); /* Spurious warning */
306
369
if (ret == NULL)
307
370
ret = "(unknown)";
308
371
return ret;
315
378
}
316
379
317
380
static int init_gnutls_global(mandos_context *mc,
318
const char *pubkeyfile,
319
const char *seckeyfile){
381
const char *pubkeyfilename,
382
const char *seckeyfilename){
320
383
int ret;
321
384
322
385
if(debug){
341
404
/* OpenPGP credentials */
342
405
gnutls_certificate_allocate_credentials(&mc->cred);
343
406
if (ret != GNUTLS_E_SUCCESS){
344
fprintf (stderr, "GnuTLS memory error: %s\n",
407
fprintf (stderr, "GnuTLS memory error: %s\n", /* Spurious
408
warning */
345
409
safer_gnutls_strerror(ret));
346
410
gnutls_global_deinit ();
347
411
return -1;
348
412
}
349
413
350
414
if(debug){
351
fprintf(stderr, "Attempting to use OpenPGP certificate %s"
352
" and keyfile %s as GnuTLS credentials\n", pubkeyfile,
353
seckeyfile);
415
fprintf(stderr, "Attempting to use OpenPGP public key %s and"
416
" secret key %s as GnuTLS credentials\n", pubkeyfilename,
417
seckeyfilename);
354
418
}
355
419
356
420
ret = gnutls_certificate_set_openpgp_key_file
357
(mc->cred, pubkeyfile, seckeyfile, GNUTLS_OPENPGP_FMT_BASE64);
421
(mc->cred, pubkeyfilename, seckeyfilename,
422
GNUTLS_OPENPGP_FMT_BASE64);
358
423
if (ret != GNUTLS_E_SUCCESS) {
359
424
fprintf(stderr,
360
425
"Error[%d] while reading the OpenPGP key pair ('%s',"
361
" '%s')\n", ret, pubkeyfile, seckeyfile);
362
fprintf(stdout, "The GnuTLS error is: %s\n",
426
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
427
fprintf(stderr, "The GnuTLS error is: %s\n",
363
428
safer_gnutls_strerror(ret));
364
429
goto globalfail;
365
430
}
379
444
}
380
445
381
446
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
382
447
383
448
return 0;
384
449
385
450
globalfail:
386
451
387
452
gnutls_certificate_free_credentials(mc->cred);
388
453
gnutls_global_deinit();
389
454
return -1;
390
391
455
}
392
456
393
457
static int init_gnutls_session(mandos_context *mc,
465
529
perror("socket");
466
530
return -1;
467
531
}
468
532
469
533
if(debug){
470
534
if(if_indextoname((unsigned int)if_index, interface) == NULL){
471
535
perror("if_indextoname");
474
538
fprintf(stderr, "Binding to interface %s\n", interface);
475
539
}
476
540
477
memset(&to,0,sizeof(to)); /* Spurious warning */
541
memset(&to, 0, sizeof(to));
478
542
to.in6.sin6_family = AF_INET6;
479
543
/* It would be nice to have a way to detect if we were passed an
480
544
IPv4 address here. Now we assume an IPv6 address. */
487
551
fprintf(stderr, "Bad address: %s\n", ip);
488
552
return -1;
489
553
}
490
to.in6.sin6_port = htons(port); /* Spurious warning */
554
to.in6.sin6_port = htons(port); /* Spurious warning */
491
555
492
556
to.in6.sin6_scope_id = (uint32_t)if_index;
493
557
510
574
perror("connect");
511
575
return -1;
512
576
}
513
577
514
578
const char *out = mandos_protocol_version;
515
579
written = 0;
516
580
while (true){
534
598
}
535
599
}
536
600
}
537
601
538
602
if(debug){
539
603
fprintf(stderr, "Establishing TLS session with %s\n", ip);
540
604
}
541
605
542
606
gnutls_transport_set_ptr (session, (gnutls_transport_ptr_t) tcp_sd);
543
607
544
608
do{
545
609
ret = gnutls_handshake (session);
546
610
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
560
624
fprintf(stderr, "Retrieving pgp encrypted password from %s\n",
561
625
ip);
562
626
}
563
627
564
628
while(true){
565
629
buffer_capacity = adjustbuffer(&buffer, buffer_length,
566
630
buffer_capacity);
610
674
gnutls_bye (session, GNUTLS_SHUT_RDWR);
611
675
612
676
if (buffer_length > 0){
613
decrypted_buffer_size = pgp_packet_decrypt(buffer,
677
decrypted_buffer_size = pgp_packet_decrypt(mc, buffer,
614
678
buffer_length,
615
&decrypted_buffer,
616
keydir);
679
&decrypted_buffer);
617
680
if (decrypted_buffer_size >= 0){
618
681
written = 0;
619
682
while(written < (size_t) decrypted_buffer_size){
634
697
} else {
635
698
retval = -1;
636
699
}
700
} else {
701
retval = -1;
637
702
}
638
703
639
704
/* Shutdown procedure */
640
705
641
706
mandos_end:
642
707
free(buffer);
643
close(tcp_sd);
708
ret = TEMP_FAILURE_RETRY(close(tcp_sd));
709
if(ret == -1){
710
perror("close");
711
}
644
712
gnutls_deinit (session);
645
713
return retval;
646
714
}
660
728
flags,
661
729
void* userdata) {
662
730
mandos_context *mc = userdata;
663
assert(r); /* Spurious warning */
731
assert(r);
664
732
665
733
/* Called whenever a service has been resolved successfully or
666
734
timed out */
684
752
}
685
753
int ret = start_mandos_communication(ip, port, interface, mc);
686
754
if (ret == 0){
687
exit(EXIT_SUCCESS);
755
avahi_simple_poll_quit(mc->simple_poll);
688
756
}
689
757
}
690
758
}
702
770
flags,
703
771
void* userdata) {
704
772
mandos_context *mc = userdata;
705
assert(b); /* Spurious warning */
773
assert(b);
706
774
707
775
/* Called whenever a new services becomes available on the LAN or
708
776
is removed from the LAN */
742
810
}
743
811
}
744
812
745
/* Combines file name and path and returns the malloced new
746
string. some sane checks could/should be added */
747
static const char *combinepath(const char *first, const char *second){
748
size_t f_len = strlen(first);
749
size_t s_len = strlen(second);
750
char *tmp = malloc(f_len + s_len + 2);
751
if (tmp == NULL){
752
return NULL;
753
}
754
if(f_len > 0){
755
memcpy(tmp, first, f_len); /* Spurious warning */
756
}
757
tmp[f_len] = '/';
758
if(s_len > 0){
759
memcpy(tmp + f_len + 1, second, s_len); /* Spurious warning */
760
}
761
tmp[f_len + 1 + s_len] = '\0';
762
return tmp;
763
}
764
765
766
813
int main(int argc, char *argv[]){
767
814
AvahiSServiceBrowser *sb = NULL;
768
815
int error;
774
821
uid_t uid;
775
822
gid_t gid;
776
823
char *connect_to = NULL;
824
char tempdir[] = "/tmp/mandosXXXXXX";
777
825
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
778
const char *pubkeyfile = "pubkey.txt";
779
const char *seckeyfile = "seckey.txt";
826
const char *seckey = PATHDIR "/" SECKEY;
827
const char *pubkey = PATHDIR "/" PUBKEY;
828
780
829
mandos_context mc = { .simple_poll = NULL, .server = NULL,
781
.dh_bits = 1024, .priority = "SECURE256"};
830
.dh_bits = 1024, .priority = "SECURE256"
831
":!CTYPE-X.509:+CTYPE-OPENPGP" };
782
832
bool gnutls_initalized = false;
833
bool pgpme_initalized = false;
783
834
784
835
{
785
836
struct argp_option options[] = {
786
837
{ .name = "debug", .key = 128,
787
838
.doc = "Debug mode", .group = 3 },
788
839
{ .name = "connect", .key = 'c',
789
.arg = "IP",
790
.doc = "Connect directly to a sepcified mandos server",
840
.arg = "ADDRESS:PORT",
841
.doc = "Connect directly to a specific Mandos server",
791
842
.group = 1 },
792
843
{ .name = "interface", .key = 'i',
793
.arg = "INTERFACE",
794
.doc = "Interface that Avahi will conntect through",
795
.group = 1 },
796
{ .name = "keydir", .key = 'd',
797
.arg = "KEYDIR",
798
.doc = "Directory where the openpgp keyring is",
844
.arg = "NAME",
845
.doc = "Interface that will be used to search for Mandos"
846
" servers",
799
847
.group = 1 },
800
848
{ .name = "seckey", .key = 's',
801
.arg = "SECKEY",
802
.doc = "Secret openpgp key for gnutls authentication",
849
.arg = "FILE",
850
.doc = "OpenPGP secret key file base name",
803
851
.group = 1 },
804
852
{ .name = "pubkey", .key = 'p',
805
.arg = "PUBKEY",
806
.doc = "Public openpgp key for gnutls authentication",
853
.arg = "FILE",
854
.doc = "OpenPGP public key file base name",
807
855
.group = 2 },
808
856
{ .name = "dh-bits", .key = 129,
809
857
.arg = "BITS",
810
.doc = "dh-bits to use in gnutls communication",
858
.doc = "Bit length of the prime number used in the"
859
" Diffie-Hellman key exchange",
811
860
.group = 2 },
812
861
{ .name = "priority", .key = 130,
813
.arg = "PRIORITY",
814
.doc = "GNUTLS priority", .group = 1 },
862
.arg = "STRING",
863
.doc = "GnuTLS priority string for the TLS handshake",
864
.group = 1 },
815
865
{ .name = NULL }
816
866
};
817
818
867
819
868
error_t parse_opt (int key, char *arg,
820
869
struct argp_state *state) {
821
870
/* Get the INPUT argument from `argp_parse', which we know is
822
871
a pointer to our plugin list pointer. */
823
872
switch (key) {
824
case 128:
873
case 128: /* --debug */
825
874
debug = true;
826
875
break;
827
case 'c':
876
case 'c': /* --connect */
828
877
connect_to = arg;
829
878
break;
830
case 'i':
879
case 'i': /* --interface */
831
880
interface = arg;
832
881
break;
833
case 'd':
834
keydir = arg;
835
break;
836
case 's':
837
seckeyfile = arg;
838
break;
839
case 'p':
840
pubkeyfile = arg;
841
break;
842
case 129:
882
case 's': /* --seckey */
883
seckey = arg;
884
break;
885
case 'p': /* --pubkey */
886
pubkey = arg;
887
break;
888
case 129: /* --dh-bits */
843
889
errno = 0;
844
890
mc.dh_bits = (unsigned int) strtol(arg, NULL, 10);
845
891
if (errno){
847
893
exit(EXIT_FAILURE);
848
894
}
849
895
break;
850
case 130:
896
case 130: /* --priority */
851
897
mc.priority = arg;
852
898
break;
853
899
case ARGP_KEY_ARG:
854
900
argp_usage (state);
901
case ARGP_KEY_END:
855
902
break;
856
case ARGP_KEY_END:
857
break;
858
903
default:
859
904
return ARGP_ERR_UNKNOWN;
860
905
}
861
906
return 0;
862
907
}
863
908
864
909
struct argp argp = { .options = options, .parser = parse_opt,
865
910
.args_doc = "",
866
911
.doc = "Mandos client -- Get and decrypt"
867
" passwords from mandos server" };
912
" passwords from a Mandos server" };
868
913
ret = argp_parse (&argp, argc, argv, 0, 0, NULL);
869
914
if (ret == ARGP_ERR_UNKNOWN){
870
fprintf(stderr, "Unkown error while parsing arguments\n");
915
fprintf(stderr, "Unknown error while parsing arguments\n");
871
916
exitcode = EXIT_FAILURE;
872
917
goto end;
873
918
}
874
919
}
875
876
pubkeyfile = combinepath(keydir, pubkeyfile);
877
if (pubkeyfile == NULL){
878
perror("combinepath");
879
exitcode = EXIT_FAILURE;
880
goto end;
881
}
882
920
883
seckeyfile = combinepath(keydir, seckeyfile);
884
if (seckeyfile == NULL){
885
perror("combinepath");
886
goto end;
887
}
888
889
ret = init_gnutls_global(&mc, pubkeyfile, seckeyfile);
921
ret = init_gnutls_global(&mc, pubkey, seckey);
890
922
if (ret == -1){
891
fprintf(stderr, "init_gnutls_global\n");
923
fprintf(stderr, "init_gnutls_global failed\n");
924
exitcode = EXIT_FAILURE;
892
925
goto end;
893
926
} else {
894
927
gnutls_initalized = true;
895
928
}
896
929
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
897
974
uid = getuid();
898
975
gid = getgid();
899
976
900
977
ret = setuid(uid);
901
978
if (ret == -1){
902
979
perror("setuid");
940
1017
goto end;
941
1018
}
942
1019
943
/* If the interface is down, bring it up */
944
{
945
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
946
if(sd < 0) {
947
perror("socket");
948
exitcode = EXIT_FAILURE;
949
goto end;
950
}
951
strcpy(network.ifr_name, interface); /* Spurious warning */
952
ret = ioctl(sd, SIOCGIFFLAGS, &network);
953
if(ret == -1){
954
perror("ioctl SIOCGIFFLAGS");
955
exitcode = EXIT_FAILURE;
956
goto end;
957
}
958
if((network.ifr_flags & IFF_UP) == 0){
959
network.ifr_flags |= IFF_UP;
960
ret = ioctl(sd, SIOCSIFFLAGS, &network);
961
if(ret == -1){
962
perror("ioctl SIOCSIFFLAGS");
963
exitcode = EXIT_FAILURE;
964
goto end;
965
}
966
}
967
close(sd);
968
}
969
970
1020
if (not debug){
971
1021
avahi_set_log_function(empty_log);
972
1022
}
982
1032
exitcode = EXIT_FAILURE;
983
1033
goto end;
984
1034
}
985
1035
986
1036
{
987
1037
AvahiServerConfig config;
988
1038
/* Do not publish any local Zeroconf records */
991
1041
config.publish_addresses = 0;
992
1042
config.publish_workstation = 0;
993
1043
config.publish_domain = 0;
994
1044
995
1045
/* Allocate a new server */
996
1046
mc.server = avahi_server_new(avahi_simple_poll_get
997
1047
(mc.simple_poll), &config, NULL,
998
1048
NULL, &error);
999
1049
1000
1050
/* Free the Avahi configuration data */
1001
1051
avahi_server_config_free(&config);
1002
1052
}
1022
1072
}
1023
1073
1024
1074
/* Run the main loop */
1025
1075
1026
1076
if (debug){
1027
1077
fprintf(stderr, "Starting Avahi loop search\n");
1028
1078
}
1030
1080
avahi_simple_poll_loop(mc.simple_poll);
1031
1081
1032
1082
end:
1033
1083
1034
1084
if (debug){
1035
1085
fprintf(stderr, "%s exiting\n", argv[0]);
1036
1086
}
1041
1091
1042
1092
if (mc.server != NULL)
1043
1093
avahi_server_free(mc.server);
1044
1094
1045
1095
if (mc.simple_poll != NULL)
1046
1096
avahi_simple_poll_free(mc.simple_poll);
1047
free(pubkeyfile);
1048
free(seckeyfile);
1049
1097
1050
1098
if (gnutls_initalized){
1051
1099
gnutls_certificate_free_credentials(mc.cred);
1052
1100
gnutls_global_deinit ();
1053
1101
}
1054
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
1055
1143
return exitcode;
1056
1144
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0