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- Committer: Teddy Hogeborn
- Date: 2008-08-03 21:45:14 UTC
- mfrom: (24.1.13 mandos)
- Revision ID: teddy@fukt.bsnet.se-20080803214514-plvvkrpoitwsrxeg
Merge.
- files added:
- ca.pem
- files removed:
- mandos-client.xml
- files renamed:
- mandos-client.c => plugbasedclient.c
- plugins.d/password-request.c => plugins.d/mandosclient.c
- plugins.d/password-prompt.c => plugins.d/passprompt.c
- mandos.conf => server.conf
- mandos => server.py
- files modified:
- Makefile
added
removed
plugins.d/mandosclient.c
34
34
35
35
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY() */
36
36
37
#include <stdio.h> /* fprintf(), stderr, fwrite(), stdout,
38
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(), memcpy(), strcpy() */
46
#include <sys/ioctl.h> /* ioctl */
47
#include <net/if.h> /* ifreq, SIOCGIFFLAGS, SIOCSIFFLAGS,
48
IFF_UP */
49
#include <sys/types.h> /* socket(), inet_pton(), sockaddr,
50
sockaddr_in6, PF_INET6,
51
SOCK_STREAM, INET6_ADDRSTRLEN,
52
uid_t, gid_t */
53
#include <inttypes.h> /* PRIu16 */
54
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
55
struct in6_addr, inet_pton(),
56
connect() */
57
#include <assert.h> /* assert() */
58
#include <errno.h> /* perror(), errno */
59
#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 */
60
44
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
61
SIOCSIFFLAGS, if_indextoname(),
62
if_nametoindex(), IF_NAMESIZE */
63
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
64
getuid(), getgid(), setuid(),
65
setgid() */
66
#include <netinet/in.h>
67
#include <arpa/inet.h> /* inet_pton(), htons */
68
#include <iso646.h> /* not, and */
69
#include <argp.h> /* struct argp_option, error_t, struct
70
argp_state, struct argp,
71
argp_parse(), ARGP_KEY_ARG,
72
ARGP_KEY_END, ARGP_ERR_UNKNOWN */
45
SIOCSIFFLAGS */
73
46
74
/* Avahi */
75
/* All Avahi types, constants and functions
76
Avahi*, avahi_*,
77
AVAHI_* */
78
47
#include <avahi-core/core.h>
79
48
#include <avahi-core/lookup.h>
80
49
#include <avahi-core/log.h>
82
51
#include <avahi-common/malloc.h>
83
52
#include <avahi-common/error.h>
84
53
85
/* GnuTLS */
86
#include <gnutls/gnutls.h> /* All GnuTLS types, constants and functions
87
gnutls_*
88
init_gnutls_session(),
89
GNUTLS_* */
90
#include <gnutls/openpgp.h> /* gnutls_certificate_set_openpgp_key_file(),
91
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 */
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 */
92
68
93
69
/* GPGME */
94
#include <gpgme.h> /* All GPGME types, constants and functions
95
gpgme_*
96
GPGME_PROTOCOL_OpenPGP,
97
GPG_ERR_NO_* */
70
#include <errno.h> /* perror() */
71
#include <gpgme.h>
72
73
/* getopt_long */
74
#include <getopt.h>
98
75
99
76
#define BUFFER_SIZE 256
100
77
78
static const char *keydir = "/conf/conf.d/mandos";
79
static const char *pubkeyfile = "pubkey.txt";
80
static const char *seckeyfile = "seckey.txt";
81
101
82
bool debug = false;
102
static const char *keydir = "/conf/conf.d/mandos";
103
static const char mandos_protocol_version[] = "1";
104
const char *argp_program_version = "password-request 1.0";
105
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
106
107
/* Used for passing in values through the Avahi callback functions */
83
84
const char mandos_protocol_version[] = "1";
85
86
/* Used for passing in values through all the callback functions */
108
87
typedef struct {
109
88
AvahiSimplePoll *simple_poll;
110
89
AvahiServer *server;
114
93
const char *priority;
115
94
} mandos_context;
116
95
117
/*
118
* Make room in "buffer" for at least BUFFER_SIZE additional bytes.
119
* "buffer_capacity" is how much is currently allocated,
120
* "buffer_length" is how much is already used.
121
*/
122
96
size_t adjustbuffer(char **buffer, size_t buffer_length,
123
97
size_t buffer_capacity){
124
98
if (buffer_length + BUFFER_SIZE > buffer_capacity){
229
203
} else {
230
204
fprintf(stderr, "Unsupported algorithm: %s\n",
231
205
result->unsupported_algorithm);
232
fprintf(stderr, "Wrong key usage: %u\n",
206
fprintf(stderr, "Wrong key usage: %d\n",
233
207
result->wrong_key_usage);
234
208
if(result->file_name != NULL){
235
209
fprintf(stderr, "File name: %s\n", result->file_name);
259
233
260
234
*plaintext = NULL;
261
235
while(true){
262
plaintext_capacity = adjustbuffer(plaintext,
263
(size_t)plaintext_length,
236
plaintext_capacity = adjustbuffer(plaintext, (size_t)plaintext_length,
264
237
plaintext_capacity);
265
238
if (plaintext_capacity == 0){
266
239
perror("adjustbuffer");
314
287
fprintf(stderr, "GnuTLS: %s", string);
315
288
}
316
289
317
static int init_gnutls_global(mandos_context *mc,
318
const char *pubkeyfile,
319
const char *seckeyfile){
290
static int init_gnutls_global(mandos_context *mc){
320
291
int ret;
321
292
322
293
if(debug){
323
294
fprintf(stderr, "Initializing GnuTLS\n");
324
295
}
325
326
ret = gnutls_global_init();
327
if (ret != GNUTLS_E_SUCCESS) {
296
297
if ((ret = gnutls_global_init ())
298
!= GNUTLS_E_SUCCESS) {
328
299
fprintf (stderr, "GnuTLS global_init: %s\n",
329
300
safer_gnutls_strerror(ret));
330
301
return -1;
339
310
}
340
311
341
312
/* OpenPGP credentials */
342
gnutls_certificate_allocate_credentials(&mc->cred);
343
if (ret != GNUTLS_E_SUCCESS){
313
if ((ret = gnutls_certificate_allocate_credentials (&mc->cred))
314
!= GNUTLS_E_SUCCESS) {
344
315
fprintf (stderr, "GnuTLS memory error: %s\n",
345
316
safer_gnutls_strerror(ret));
346
gnutls_global_deinit ();
347
317
return -1;
348
318
}
349
319
361
331
" '%s')\n", ret, pubkeyfile, seckeyfile);
362
332
fprintf(stdout, "The GnuTLS error is: %s\n",
363
333
safer_gnutls_strerror(ret));
364
goto globalfail;
334
return -1;
365
335
}
366
336
367
337
/* GnuTLS server initialization */
369
339
if (ret != GNUTLS_E_SUCCESS) {
370
340
fprintf (stderr, "Error in GnuTLS DH parameter initialization:"
371
341
" %s\n", safer_gnutls_strerror(ret));
372
goto globalfail;
342
return -1;
373
343
}
374
344
ret = gnutls_dh_params_generate2(mc->dh_params, mc->dh_bits);
375
345
if (ret != GNUTLS_E_SUCCESS) {
376
346
fprintf (stderr, "Error in GnuTLS prime generation: %s\n",
377
347
safer_gnutls_strerror(ret));
378
goto globalfail;
348
return -1;
379
349
}
380
350
381
351
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
382
352
383
353
return 0;
384
385
globalfail:
386
387
gnutls_certificate_free_credentials(mc->cred);
388
gnutls_global_deinit();
389
return -1;
390
391
354
}
392
355
393
static int init_gnutls_session(mandos_context *mc,
394
gnutls_session_t *session){
356
static int init_gnutls_session(mandos_context *mc, gnutls_session_t *session){
395
357
int ret;
396
358
/* GnuTLS session creation */
397
359
ret = gnutls_init(session, GNUTLS_SERVER);
407
369
fprintf(stderr, "Syntax error at: %s\n", err);
408
370
fprintf(stderr, "GnuTLS error: %s\n",
409
371
safer_gnutls_strerror(ret));
410
gnutls_deinit (*session);
411
372
return -1;
412
373
}
413
374
}
417
378
if (ret != GNUTLS_E_SUCCESS) {
418
379
fprintf(stderr, "Error setting GnuTLS credentials: %s\n",
419
380
safer_gnutls_strerror(ret));
420
gnutls_deinit (*session);
421
381
return -1;
422
382
}
423
383
439
399
AvahiIfIndex if_index,
440
400
mandos_context *mc){
441
401
int ret, tcp_sd;
442
union { struct sockaddr in; struct sockaddr_in6 in6; } to;
402
struct sockaddr_in6 to;
443
403
char *buffer = NULL;
444
404
char *decrypted_buffer;
445
405
size_t buffer_length = 0;
449
409
int retval = 0;
450
410
char interface[IF_NAMESIZE];
451
411
gnutls_session_t session;
412
gnutls_dh_params_t dh_params;
452
413
453
414
ret = init_gnutls_session (mc, &session);
454
415
if (ret != 0){
456
417
}
457
418
458
419
if(debug){
459
fprintf(stderr, "Setting up a tcp connection to %s, port %" PRIu16
460
"\n", ip, port);
420
fprintf(stderr, "Setting up a tcp connection to %s, port %d\n",
421
ip, port);
461
422
}
462
423
463
424
tcp_sd = socket(PF_INET6, SOCK_STREAM, 0);
475
436
}
476
437
477
438
memset(&to,0,sizeof(to)); /* Spurious warning */
478
to.in6.sin6_family = AF_INET6;
439
to.sin6_family = AF_INET6;
479
440
/* It would be nice to have a way to detect if we were passed an
480
441
IPv4 address here. Now we assume an IPv6 address. */
481
ret = inet_pton(AF_INET6, ip, &to.in6.sin6_addr);
442
ret = inet_pton(AF_INET6, ip, &to.sin6_addr);
482
443
if (ret < 0 ){
483
444
perror("inet_pton");
484
445
return -1;
487
448
fprintf(stderr, "Bad address: %s\n", ip);
488
449
return -1;
489
450
}
490
to.in6.sin6_port = htons(port); /* Spurious warning */
451
to.sin6_port = htons(port); /* Spurious warning */
491
452
492
to.in6.sin6_scope_id = (uint32_t)if_index;
453
to.sin6_scope_id = (uint32_t)if_index;
493
454
494
455
if(debug){
495
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
496
port);
456
fprintf(stderr, "Connection to: %s, port %d\n", ip, port);
497
457
char addrstr[INET6_ADDRSTRLEN] = "";
498
if(inet_ntop(to.in6.sin6_family, &(to.in6.sin6_addr), addrstr,
458
if(inet_ntop(to.sin6_family, &(to.sin6_addr), addrstr,
499
459
sizeof(addrstr)) == NULL){
500
460
perror("inet_ntop");
501
461
} else {
505
465
}
506
466
}
507
467
508
ret = connect(tcp_sd, &to.in, sizeof(to));
468
ret = connect(tcp_sd, (struct sockaddr *) &to, sizeof(to));
509
469
if (ret < 0){
510
470
perror("connect");
511
471
return -1;
540
500
}
541
501
542
502
gnutls_transport_set_ptr (session, (gnutls_transport_ptr_t) tcp_sd);
543
544
do{
545
ret = gnutls_handshake (session);
546
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
503
504
ret = gnutls_handshake (session);
547
505
548
506
if (ret != GNUTLS_E_SUCCESS){
549
507
if(debug){
562
520
}
563
521
564
522
while(true){
565
buffer_capacity = adjustbuffer(&buffer, buffer_length,
566
buffer_capacity);
523
buffer_capacity = adjustbuffer(&buffer, buffer_length, buffer_capacity);
567
524
if (buffer_capacity == 0){
568
525
perror("adjustbuffer");
569
526
retval = -1;
581
538
case GNUTLS_E_AGAIN:
582
539
break;
583
540
case GNUTLS_E_REHANDSHAKE:
584
do{
585
ret = gnutls_handshake (session);
586
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
541
ret = gnutls_handshake (session);
587
542
if (ret < 0){
588
543
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
589
544
gnutls_perror (ret);
642
597
free(buffer);
643
598
close(tcp_sd);
644
599
gnutls_deinit (session);
600
gnutls_certificate_free_credentials (mc->cred);
601
gnutls_global_deinit ();
645
602
return retval;
646
603
}
647
604
678
635
char ip[AVAHI_ADDRESS_STR_MAX];
679
636
avahi_address_snprint(ip, sizeof(ip), address);
680
637
if(debug){
681
fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %"
682
PRIu16 ") on port %d\n", name, host_name, ip,
683
interface, port);
638
fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %d) on"
639
" port %d\n", name, host_name, ip, interface, port);
684
640
}
685
641
int ret = start_mandos_communication(ip, port, interface, mc);
686
642
if (ret == 0){
775
731
gid_t gid;
776
732
char *connect_to = NULL;
777
733
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
778
const char *pubkeyfile = "pubkey.txt";
779
const char *seckeyfile = "seckey.txt";
780
734
mandos_context mc = { .simple_poll = NULL, .server = NULL,
781
735
.dh_bits = 1024, .priority = "SECURE256"};
782
bool gnutls_initalized = false;
783
736
784
737
{
785
struct argp_option options[] = {
786
{ .name = "debug", .key = 128,
787
.doc = "Debug mode", .group = 3 },
788
{ .name = "connect", .key = 'c',
789
.arg = "IP",
790
.doc = "Connect directly to a sepcified mandos server",
791
.group = 1 },
792
{ .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",
799
.group = 1 },
800
{ .name = "seckey", .key = 's',
801
.arg = "SECKEY",
802
.doc = "Secret openpgp key for gnutls authentication",
803
.group = 1 },
804
{ .name = "pubkey", .key = 'p',
805
.arg = "PUBKEY",
806
.doc = "Public openpgp key for gnutls authentication",
807
.group = 2 },
808
{ .name = "dh-bits", .key = 129,
809
.arg = "BITS",
810
.doc = "dh-bits to use in gnutls communication",
811
.group = 2 },
812
{ .name = "priority", .key = 130,
813
.arg = "PRIORITY",
814
.doc = "GNUTLS priority", .group = 1 },
815
{ .name = NULL }
816
};
817
818
819
error_t parse_opt (int key, char *arg,
820
struct argp_state *state) {
821
/* Get the INPUT argument from `argp_parse', which we know is
822
a pointer to our plugin list pointer. */
823
switch (key) {
824
case 128:
825
debug = true;
738
/* Temporary int to get the address of for getopt_long */
739
int debug_int = debug ? 1 : 0;
740
while (true){
741
struct option long_options[] = {
742
{"debug", no_argument, &debug_int, 1},
743
{"connect", required_argument, NULL, 'c'},
744
{"interface", required_argument, NULL, 'i'},
745
{"keydir", required_argument, NULL, 'd'},
746
{"seckey", required_argument, NULL, 's'},
747
{"pubkey", required_argument, NULL, 'p'},
748
{"dh-bits", required_argument, NULL, 'D'},
749
{"priority", required_argument, NULL, 'P'},
750
{0, 0, 0, 0} };
751
752
int option_index = 0;
753
ret = getopt_long (argc, argv, "i:", long_options,
754
&option_index);
755
756
if (ret == -1){
757
break;
758
}
759
760
switch(ret){
761
case 0:
762
break;
763
case 'i':
764
interface = optarg;
826
765
break;
827
766
case 'c':
828
connect_to = arg;
829
break;
830
case 'i':
831
interface = arg;
767
connect_to = optarg;
832
768
break;
833
769
case 'd':
834
keydir = arg;
770
keydir = optarg;
771
break;
772
case 'p':
773
pubkeyfile = optarg;
835
774
break;
836
775
case 's':
837
seckeyfile = arg;
838
break;
839
case 'p':
840
pubkeyfile = arg;
841
break;
842
case 129:
776
seckeyfile = optarg;
777
break;
778
case 'D':
843
779
errno = 0;
844
mc.dh_bits = (unsigned int) strtol(arg, NULL, 10);
780
mc.dh_bits = (unsigned int) strtol(optarg, NULL, 10);
845
781
if (errno){
846
782
perror("strtol");
847
783
exit(EXIT_FAILURE);
848
784
}
849
785
break;
850
case 130:
851
mc.priority = arg;
852
break;
853
case ARGP_KEY_ARG:
854
argp_usage (state);
855
break;
856
case ARGP_KEY_END:
857
break;
786
case 'P':
787
mc.priority = optarg;
788
break;
789
case '?':
858
790
default:
859
return ARGP_ERR_UNKNOWN;
791
/* getopt_long() has already printed a message about the
792
unrcognized option, so just exit. */
793
exit(EXIT_FAILURE);
860
794
}
861
return 0;
862
}
863
864
struct argp argp = { .options = options, .parser = parse_opt,
865
.args_doc = "",
866
.doc = "Mandos client -- Get and decrypt"
867
" passwords from mandos server" };
868
ret = argp_parse (&argp, argc, argv, 0, 0, NULL);
869
if (ret == ARGP_ERR_UNKNOWN){
870
fprintf(stderr, "Unkown error while parsing arguments\n");
871
exitcode = EXIT_FAILURE;
872
goto end;
873
}
795
}
796
/* Set the global debug flag from the temporary int */
797
debug = debug_int ? true : false;
874
798
}
875
799
876
800
pubkeyfile = combinepath(keydir, pubkeyfile);
877
801
if (pubkeyfile == NULL){
878
802
perror("combinepath");
886
810
goto end;
887
811
}
888
812
889
ret = init_gnutls_global(&mc, pubkeyfile, seckeyfile);
813
ret = init_gnutls_global(&mc);
890
814
if (ret == -1){
891
815
fprintf(stderr, "init_gnutls_global\n");
892
816
goto end;
893
} else {
894
gnutls_initalized = true;
895
817
}
896
818
897
819
uid = getuid();
1046
968
avahi_simple_poll_free(mc.simple_poll);
1047
969
free(pubkeyfile);
1048
970
free(seckeyfile);
1049
1050
if (gnutls_initalized){
1051
gnutls_certificate_free_credentials(mc.cred);
1052
gnutls_global_deinit ();
1053
}
1054
971
1055
972
return exitcode;
1056
973
}
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Version: 2.0.2.dev0