To get this branch, use:
bzr branch
http://bzr.recompile.se/loggerhead/mandos/release
« back to all changes in this revision
Viewing changes to plugins.d/password-request.c
- browse files at revision 53
- compare with another revision
- download diff
- download tarball
- view history from revision 53
- Committer: Teddy Hogeborn
- Date: 2008-08-09 04:56:00 UTC
- mfrom: (24.1.27 mandos)
- Revision ID: teddy@fukt.bsnet.se-20080809045600-m7jx3tj4wwunaffa
Merge.
- files added:
- network-protocol.txt
- files removed:
- .bzrignore
- files renamed:
- plugin-runner.c => mandos-client.c
- plugin-runner.xml => mandos-client.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(), asprintf() */
35
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY() */
36
36
37
#include <stdio.h> /* fprintf(), stderr, fwrite(),
38
stdout, ferror() */
37
#include <stdio.h> /* fprintf(), stderr, fwrite(), stdout, ferror() */
39
38
#include <stdint.h> /* uint16_t, uint32_t */
40
39
#include <stddef.h> /* NULL, size_t, ssize_t */
41
#include <stdlib.h> /* free(), EXIT_SUCCESS, EXIT_FAILURE,
42
srand() */
40
#include <stdlib.h> /* free() */
43
41
#include <stdbool.h> /* bool, true */
44
#include <string.h> /* memset(), strcmp(), strlen(),
45
strerror(), asprintf(), strcpy() */
46
#include <sys/ioctl.h> /* ioctl */
42
#include <string.h> /* memset(), strcmp(), strlen, strerror() */
43
#include <sys/ioctl.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
44
SIOCSIFFLAGS */
47
45
#include <sys/types.h> /* socket(), inet_pton(), sockaddr,
48
sockaddr_in6, PF_INET6,
49
SOCK_STREAM, INET6_ADDRSTRLEN,
50
uid_t, gid_t */
51
#include <inttypes.h> /* PRIu16 */
46
sockaddr_in6, PF_INET6, SOCK_STREAM, INET6_ADDRSTRLEN */
52
47
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
53
48
struct in6_addr, inet_pton(),
54
49
connect() */
55
#include <assert.h> /* assert() */
56
#include <errno.h> /* perror(), errno */
57
#include <time.h> /* time() */
50
#include <assert.h>
51
#include <errno.h> /* perror() */
52
#include <time.h>
58
53
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
59
54
SIOCSIFFLAGS, if_indextoname(),
60
55
if_nametoindex(), IF_NAMESIZE */
61
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
62
getuid(), getgid(), setuid(),
63
setgid() */
56
#include <unistd.h> /* close(), SEEK_SET, off_t, write()*/
64
57
#include <netinet/in.h>
65
58
#include <arpa/inet.h> /* inet_pton(), htons */
66
#include <iso646.h> /* not, and */
67
#include <argp.h> /* struct argp_option, error_t, struct
68
argp_state, struct argp,
69
argp_parse(), ARGP_KEY_ARG,
70
ARGP_KEY_END, ARGP_ERR_UNKNOWN */
59
#include <iso646.h> /* not */
60
#include <argp.h> /* struct argp_option,
61
struct argp_state, struct argp,
62
argp_parse() */
71
63
72
64
/* Avahi */
73
/* All Avahi types, constants and functions
74
Avahi*, avahi_*,
75
AVAHI_* */
76
#include <avahi-core/core.h>
65
#include <avahi-core/core.h> /* AvahiSimplePoll, AvahiServer,
66
AvahiIfIndex */
77
67
#include <avahi-core/lookup.h>
78
#include <avahi-core/log.h>
68
#include <avahi-core/log.h> /* AvahiLogLevel */
79
69
#include <avahi-common/simple-watch.h>
80
70
#include <avahi-common/malloc.h>
81
71
#include <avahi-common/error.h>
82
72
83
73
/* GnuTLS */
84
#include <gnutls/gnutls.h> /* All GnuTLS types, constants and
85
functions:
86
gnutls_*
74
#include <gnutls/gnutls.h> /* gnutls_certificate_credentials_t,
75
gnutls_dh_params_t,
76
gnutls_strerror(),
77
gnutls_global_init(),
78
gnutls_global_set_log_level(),
79
gnutls_global_set_log_function(),
80
gnutls_certificate_allocate_credentials(),
81
gnutls_global_deinit(),
82
gnutls_dh_params_init(),
83
gnutls_dh_params_generate(),
84
gnutls_certificate_set_dh_params(),
85
gnutls_certificate_free_credentials(),
86
gnutls_session_t, gnutls_init(),
87
gnutls_priority_set_direct(),
88
gnutls_deinit(),
89
gnutls_credentials_set(),
90
gnutls_certificate_server_set_request(),
91
gnutls_dh_set_prime_bits(),
92
gnutls_transport_set_ptr(),
93
gnutls_transport_ptr_t,
94
gnutls_handshake(),
95
gnutls_record_recv()
96
gnutls_perror(), gnutls_bye(),
87
97
init_gnutls_session(),
88
GNUTLS_* */
89
#include <gnutls/openpgp.h> /* gnutls_certificate_set_openpgp_key_file(),
90
GNUTLS_OPENPGP_FMT_BASE64 */
98
GNUTLS_E_SUCCESS,
99
GNUTLS_CRD_CERTIFICATE,
100
GNUTLS_CERT_IGNORE,
101
GNUTLS_E_INTERRUPTED,
102
GNUTLS_E_AGAIN,
103
GNUTLS_E_REHANDSHAKE,
104
GNUTLS_SHUT_RDWR, */
105
#include <gnutls/openpgp.h> /* gnutls_certificate_set_openpgp_key_file(),
106
GNUTLS_OPENPGP_FMT_BASE64 */
91
107
92
108
/* GPGME */
93
#include <gpgme.h> /* All GPGME types, constants and
94
functions:
95
gpgme_*
109
#include <gpgme.h> /* gpgme_data_t, gpgme_ctx_t,
110
gpgme_error_t, gpgme_engine_info_t,
111
gpgme_check_version(),
112
gpgme_engine_check_version(),
113
gpgme_strsource(),
114
gpgme_strerror(),
115
gpgme_get_engine_info(),
116
gpgme_set_engine_info(),
117
gpgme_data_new_from_mem(),
118
gpgme_data_new(), gpgme_new(),
119
gpgme_op_decrypt(),
120
gpgme_decrypt_result_t,
121
gpgme_op_decrypt_result(),
122
gpgme_recipient_t,
123
gpgme_pubkey_algo_name(),
124
gpgme_data_seek(),
125
gpgme_data_read(),
126
gpgme_data_release()
96
127
GPGME_PROTOCOL_OpenPGP,
97
GPG_ERR_NO_* */
128
GPG_ERR_NO_ERROR,
129
GPG_ERR_NO_SECKEY, */
98
130
99
131
#define BUFFER_SIZE 256
100
132
101
133
bool debug = false;
102
134
static const char *keydir = "/conf/conf.d/mandos";
103
135
static const char mandos_protocol_version[] = "1";
104
const char *argp_program_version = "password-request 1.0";
136
const char *argp_program_version = "mandosclient 0.9";
105
137
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
106
138
107
139
/* Used for passing in values through the Avahi callback functions */
214
246
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
215
247
gpgme_strsource(rc), gpgme_strerror(rc));
216
248
plaintext_length = -1;
217
if (debug){
218
gpgme_decrypt_result_t result;
219
result = gpgme_op_decrypt_result(ctx);
220
if (result == NULL){
221
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
222
} else {
223
fprintf(stderr, "Unsupported algorithm: %s\n",
224
result->unsupported_algorithm);
225
fprintf(stderr, "Wrong key usage: %u\n",
226
result->wrong_key_usage);
227
if(result->file_name != NULL){
228
fprintf(stderr, "File name: %s\n", result->file_name);
229
}
230
gpgme_recipient_t recipient;
231
recipient = result->recipients;
232
if(recipient){
233
while(recipient != NULL){
234
fprintf(stderr, "Public key algorithm: %s\n",
235
gpgme_pubkey_algo_name(recipient->pubkey_algo));
236
fprintf(stderr, "Key ID: %s\n", recipient->keyid);
237
fprintf(stderr, "Secret key available: %s\n",
238
recipient->status == GPG_ERR_NO_SECKEY
239
? "No" : "Yes");
240
recipient = recipient->next;
241
}
242
}
243
}
244
}
245
249
goto decrypt_end;
246
250
}
247
251
249
253
fprintf(stderr, "Decryption of OpenPGP data succeeded\n");
250
254
}
251
255
256
if (debug){
257
gpgme_decrypt_result_t result;
258
result = gpgme_op_decrypt_result(ctx);
259
if (result == NULL){
260
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
261
} else {
262
fprintf(stderr, "Unsupported algorithm: %s\n",
263
result->unsupported_algorithm);
264
fprintf(stderr, "Wrong key usage: %d\n",
265
result->wrong_key_usage);
266
if(result->file_name != NULL){
267
fprintf(stderr, "File name: %s\n", result->file_name);
268
}
269
gpgme_recipient_t recipient;
270
recipient = result->recipients;
271
if(recipient){
272
while(recipient != NULL){
273
fprintf(stderr, "Public key algorithm: %s\n",
274
gpgme_pubkey_algo_name(recipient->pubkey_algo));
275
fprintf(stderr, "Key ID: %s\n", recipient->keyid);
276
fprintf(stderr, "Secret key available: %s\n",
277
recipient->status == GPG_ERR_NO_SECKEY
278
? "No" : "Yes");
279
recipient = recipient->next;
280
}
281
}
282
}
283
}
284
252
285
/* Seek back to the beginning of the GPGME plaintext data buffer */
253
286
if (gpgme_data_seek(dh_plain, (off_t) 0, SEEK_SET) == -1){
254
287
perror("pgpme_data_seek");
301
334
}
302
335
303
336
static const char * safer_gnutls_strerror (int value) {
304
const char *ret = gnutls_strerror (value); /* Spurious warning */
337
const char *ret = gnutls_strerror (value);
305
338
if (ret == NULL)
306
339
ret = "(unknown)";
307
340
return ret;
314
347
}
315
348
316
349
static int init_gnutls_global(mandos_context *mc,
317
const char *pubkeyfilename,
318
const char *seckeyfilename){
350
const char *pubkeyfile,
351
const char *seckeyfile){
319
352
int ret;
320
353
321
354
if(debug){
322
355
fprintf(stderr, "Initializing GnuTLS\n");
323
356
}
324
325
ret = gnutls_global_init();
326
if (ret != GNUTLS_E_SUCCESS) {
357
358
if ((ret = gnutls_global_init ())
359
!= GNUTLS_E_SUCCESS) {
327
360
fprintf (stderr, "GnuTLS global_init: %s\n",
328
361
safer_gnutls_strerror(ret));
329
362
return -1;
338
371
}
339
372
340
373
/* OpenPGP credentials */
341
gnutls_certificate_allocate_credentials(&mc->cred);
342
if (ret != GNUTLS_E_SUCCESS){
343
fprintf (stderr, "GnuTLS memory error: %s\n", /* Spurious
344
warning */
374
if ((ret = gnutls_certificate_allocate_credentials (&mc->cred))
375
!= GNUTLS_E_SUCCESS) {
376
fprintf (stderr, "GnuTLS memory error: %s\n",
345
377
safer_gnutls_strerror(ret));
346
378
gnutls_global_deinit ();
347
379
return -1;
349
381
350
382
if(debug){
351
383
fprintf(stderr, "Attempting to use OpenPGP certificate %s"
352
" and keyfile %s as GnuTLS credentials\n", pubkeyfilename,
353
seckeyfilename);
384
" and keyfile %s as GnuTLS credentials\n", pubkeyfile,
385
seckeyfile);
354
386
}
355
387
356
388
ret = gnutls_certificate_set_openpgp_key_file
357
(mc->cred, pubkeyfilename, seckeyfilename,
358
GNUTLS_OPENPGP_FMT_BASE64);
389
(mc->cred, pubkeyfile, seckeyfile, GNUTLS_OPENPGP_FMT_BASE64);
359
390
if (ret != GNUTLS_E_SUCCESS) {
360
391
fprintf(stderr,
361
392
"Error[%d] while reading the OpenPGP key pair ('%s',"
362
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
393
" '%s')\n", ret, pubkeyfile, seckeyfile);
363
394
fprintf(stdout, "The GnuTLS error is: %s\n",
364
395
safer_gnutls_strerror(ret));
365
396
goto globalfail;
457
488
}
458
489
459
490
if(debug){
460
fprintf(stderr, "Setting up a tcp connection to %s, port %" PRIu16
461
"\n", ip, port);
491
fprintf(stderr, "Setting up a tcp connection to %s, port %d\n",
492
ip, port);
462
493
}
463
494
464
495
tcp_sd = socket(PF_INET6, SOCK_STREAM, 0);
475
506
fprintf(stderr, "Binding to interface %s\n", interface);
476
507
}
477
508
478
memset(&to, 0, sizeof(to));
509
memset(&to,0,sizeof(to)); /* Spurious warning */
479
510
to.in6.sin6_family = AF_INET6;
480
511
/* It would be nice to have a way to detect if we were passed an
481
512
IPv4 address here. Now we assume an IPv6 address. */
488
519
fprintf(stderr, "Bad address: %s\n", ip);
489
520
return -1;
490
521
}
491
to.in6.sin6_port = htons(port); /* Spurious warning */
522
to.in6.sin6_port = htons(port); /* Spurious warning */
492
523
493
524
to.in6.sin6_scope_id = (uint32_t)if_index;
494
525
495
526
if(debug){
496
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
497
port);
527
fprintf(stderr, "Connection to: %s, port %d\n", ip, port);
498
528
char addrstr[INET6_ADDRSTRLEN] = "";
499
529
if(inet_ntop(to.in6.sin6_family, &(to.in6.sin6_addr), addrstr,
500
530
sizeof(addrstr)) == NULL){
541
571
}
542
572
543
573
gnutls_transport_set_ptr (session, (gnutls_transport_ptr_t) tcp_sd);
544
545
do{
546
ret = gnutls_handshake (session);
547
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
574
575
ret = gnutls_handshake (session);
548
576
549
577
if (ret != GNUTLS_E_SUCCESS){
550
578
if(debug){
582
610
case GNUTLS_E_AGAIN:
583
611
break;
584
612
case GNUTLS_E_REHANDSHAKE:
585
do{
586
ret = gnutls_handshake (session);
587
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
613
ret = gnutls_handshake (session);
588
614
if (ret < 0){
589
615
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
590
616
gnutls_perror (ret);
635
661
} else {
636
662
retval = -1;
637
663
}
638
} else {
639
retval = -1;
640
664
}
641
665
642
666
/* Shutdown procedure */
663
687
flags,
664
688
void* userdata) {
665
689
mandos_context *mc = userdata;
666
assert(r);
690
assert(r); /* Spurious warning */
667
691
668
692
/* Called whenever a service has been resolved successfully or
669
693
timed out */
681
705
char ip[AVAHI_ADDRESS_STR_MAX];
682
706
avahi_address_snprint(ip, sizeof(ip), address);
683
707
if(debug){
684
fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %"
685
PRIu16 ") on port %d\n", name, host_name, ip,
686
interface, port);
708
fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %d) on"
709
" port %d\n", name, host_name, ip, interface, port);
687
710
}
688
711
int ret = start_mandos_communication(ip, port, interface, mc);
689
712
if (ret == 0){
690
avahi_simple_poll_quit(mc->simple_poll);
713
exit(EXIT_SUCCESS);
691
714
}
692
715
}
693
716
}
705
728
flags,
706
729
void* userdata) {
707
730
mandos_context *mc = userdata;
708
assert(b);
731
assert(b); /* Spurious warning */
709
732
710
733
/* Called whenever a new services becomes available on the LAN or
711
734
is removed from the LAN */
747
770
748
771
/* Combines file name and path and returns the malloced new
749
772
string. some sane checks could/should be added */
750
static char *combinepath(const char *first, const char *second){
751
char *tmp;
752
int ret = asprintf(&tmp, "%s/%s", first, second);
753
if(ret < 0){
773
static const char *combinepath(const char *first, const char *second){
774
size_t f_len = strlen(first);
775
size_t s_len = strlen(second);
776
char *tmp = malloc(f_len + s_len + 2);
777
if (tmp == NULL){
754
778
return NULL;
755
779
}
780
if(f_len > 0){
781
memcpy(tmp, first, f_len); /* Spurious warning */
782
}
783
tmp[f_len] = '/';
784
if(s_len > 0){
785
memcpy(tmp + f_len + 1, second, s_len); /* Spurious warning */
786
}
787
tmp[f_len + 1 + s_len] = '\0';
756
788
return tmp;
757
789
}
758
790
769
801
gid_t gid;
770
802
char *connect_to = NULL;
771
803
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
772
char *pubkeyfilename = NULL;
773
char *seckeyfilename = NULL;
774
const char *pubkeyname = "pubkey.txt";
775
const char *seckeyname = "seckey.txt";
804
const char *pubkeyfile = "pubkey.txt";
805
const char *seckeyfile = "seckey.txt";
776
806
mandos_context mc = { .simple_poll = NULL, .server = NULL,
777
807
.dh_bits = 1024, .priority = "SECURE256"};
778
808
bool gnutls_initalized = false;
830
860
keydir = arg;
831
861
break;
832
862
case 's':
833
seckeyname = arg;
863
seckeyfile = arg;
834
864
break;
835
865
case 'p':
836
pubkeyname = arg;
866
pubkeyfile = arg;
837
867
break;
838
868
case 129:
839
869
errno = 0;
848
878
break;
849
879
case ARGP_KEY_ARG:
850
880
argp_usage (state);
851
case ARGP_KEY_END:
852
881
break;
882
case ARGP_KEY_END:
883
break;
853
884
default:
854
885
return ARGP_ERR_UNKNOWN;
855
886
}
860
891
.args_doc = "",
861
892
.doc = "Mandos client -- Get and decrypt"
862
893
" passwords from mandos server" };
863
ret = argp_parse (&argp, argc, argv, 0, 0, NULL);
864
if (ret == ARGP_ERR_UNKNOWN){
865
fprintf(stderr, "Unknown error while parsing arguments\n");
866
exitcode = EXIT_FAILURE;
867
goto end;
868
}
894
argp_parse (&argp, argc, argv, 0, 0, NULL);
869
895
}
870
896
871
pubkeyfilename = combinepath(keydir, pubkeyname);
872
if (pubkeyfilename == NULL){
897
pubkeyfile = combinepath(keydir, pubkeyfile);
898
if (pubkeyfile == NULL){
873
899
perror("combinepath");
874
900
exitcode = EXIT_FAILURE;
875
901
goto end;
876
902
}
877
903
878
seckeyfilename = combinepath(keydir, seckeyname);
879
if (seckeyfilename == NULL){
904
seckeyfile = combinepath(keydir, seckeyfile);
905
if (seckeyfile == NULL){
880
906
perror("combinepath");
881
exitcode = EXIT_FAILURE;
882
907
goto end;
883
908
}
884
909
885
ret = init_gnutls_global(&mc, pubkeyfilename, seckeyfilename);
910
ret = init_gnutls_global(&mc, pubkeyfile, seckeyfile);
886
911
if (ret == -1){
887
fprintf(stderr, "init_gnutls_global failed\n");
888
exitcode = EXIT_FAILURE;
912
fprintf(stderr, "init_gnutls_global\n");
889
913
goto end;
890
914
} else {
891
915
gnutls_initalized = true;
892
916
}
893
894
/* If the interface is down, bring it up */
895
{
896
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
897
if(sd < 0) {
898
perror("socket");
899
exitcode = EXIT_FAILURE;
900
goto end;
901
}
902
strcpy(network.ifr_name, interface);
903
ret = ioctl(sd, SIOCGIFFLAGS, &network);
904
if(ret == -1){
905
perror("ioctl SIOCGIFFLAGS");
906
exitcode = EXIT_FAILURE;
907
goto end;
908
}
909
if((network.ifr_flags & IFF_UP) == 0){
910
network.ifr_flags |= IFF_UP;
911
ret = ioctl(sd, SIOCSIFFLAGS, &network);
912
if(ret == -1){
913
perror("ioctl SIOCSIFFLAGS");
914
exitcode = EXIT_FAILURE;
915
goto end;
916
}
917
}
918
close(sd);
919
}
920
917
921
918
uid = getuid();
922
919
gid = getgid();
923
920
924
921
ret = setuid(uid);
925
922
if (ret == -1){
926
923
perror("setuid");
964
961
goto end;
965
962
}
966
963
964
/* If the interface is down, bring it up */
965
{
966
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
967
if(sd < 0) {
968
perror("socket");
969
exitcode = EXIT_FAILURE;
970
goto end;
971
}
972
strcpy(network.ifr_name, interface); /* Spurious warning */
973
ret = ioctl(sd, SIOCGIFFLAGS, &network);
974
if(ret == -1){
975
perror("ioctl SIOCGIFFLAGS");
976
exitcode = EXIT_FAILURE;
977
goto end;
978
}
979
if((network.ifr_flags & IFF_UP) == 0){
980
network.ifr_flags |= IFF_UP;
981
ret = ioctl(sd, SIOCSIFFLAGS, &network);
982
if(ret == -1){
983
perror("ioctl SIOCSIFFLAGS");
984
exitcode = EXIT_FAILURE;
985
goto end;
986
}
987
}
988
close(sd);
989
}
990
967
991
if (not debug){
968
992
avahi_set_log_function(empty_log);
969
993
}
1041
1065
1042
1066
if (mc.simple_poll != NULL)
1043
1067
avahi_simple_poll_free(mc.simple_poll);
1044
free(pubkeyfilename);
1045
free(seckeyfilename);
1068
free(pubkeyfile);
1069
free(seckeyfile);
1046
1070
1047
1071
if (gnutls_initalized){
1048
gnutls_certificate_free_credentials(mc.cred);
1072
gnutls_certificate_free_credentials (mc.cred);
1049
1073
gnutls_global_deinit ();
1050
1074
}
1051
1075
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0