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- Committer: Teddy Hogeborn
- Date: 2008-08-10 16:13:23 UTC
- Revision ID: teddy@fukt.bsnet.se-20080810161323-wrh1rbpdrq0otuhf
* mandos (console): Define handler globally.
(main): If in debug mode, also reduce consol log level. Remove
console log handler before daemonizing.
(main): If in debug mode, also reduce consol log level. Remove
console log handler before daemonizing.
- files added:
- mandos-client.xml
- files removed:
- ca.pem
- files renamed:
- server.py => mandos
- plugbasedclient.c => mandos-client.c
- server.conf => mandos.conf
- plugins.d/passprompt.c => plugins.d/password-prompt.c
- plugins.d/mandosclient.c => plugins.d/password-request.c
- files modified:
- Makefile
added
removed
plugins.d/password-request.c
34
34
35
35
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY() */
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(), 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() */
44
60
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
45
SIOCSIFFLAGS */
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 */
46
73
74
/* Avahi */
75
/* All Avahi types, constants and functions
76
Avahi*, avahi_*,
77
AVAHI_* */
47
78
#include <avahi-core/core.h>
48
79
#include <avahi-core/lookup.h>
49
80
#include <avahi-core/log.h>
51
82
#include <avahi-common/malloc.h>
52
83
#include <avahi-common/error.h>
53
84
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 */
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 */
68
92
69
93
/* GPGME */
70
#include <errno.h> /* perror() */
71
#include <gpgme.h>
72
73
/* getopt_long */
74
#include <getopt.h>
94
#include <gpgme.h> /* All GPGME types, constants and functions
95
gpgme_*
96
GPGME_PROTOCOL_OpenPGP,
97
GPG_ERR_NO_* */
75
98
76
99
#define BUFFER_SIZE 256
77
100
101
bool debug = false;
78
102
static const char *keydir = "/conf/conf.d/mandos";
79
static const char *pubkeyfile = "pubkey.txt";
80
static const char *seckeyfile = "seckey.txt";
81
82
bool debug = false;
83
84
const char mandos_protocol_version[] = "1";
85
86
/* Used for passing in values through all the callback functions */
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 */
87
108
typedef struct {
88
109
AvahiSimplePoll *simple_poll;
89
110
AvahiServer *server;
93
114
const char *priority;
94
115
} mandos_context;
95
116
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
*/
96
122
size_t adjustbuffer(char **buffer, size_t buffer_length,
97
123
size_t buffer_capacity){
98
124
if (buffer_length + BUFFER_SIZE > buffer_capacity){
203
229
} else {
204
230
fprintf(stderr, "Unsupported algorithm: %s\n",
205
231
result->unsupported_algorithm);
206
fprintf(stderr, "Wrong key usage: %d\n",
232
fprintf(stderr, "Wrong key usage: %u\n",
207
233
result->wrong_key_usage);
208
234
if(result->file_name != NULL){
209
235
fprintf(stderr, "File name: %s\n", result->file_name);
233
259
234
260
*plaintext = NULL;
235
261
while(true){
236
plaintext_capacity = adjustbuffer(plaintext, (size_t)plaintext_length,
262
plaintext_capacity = adjustbuffer(plaintext,
263
(size_t)plaintext_length,
237
264
plaintext_capacity);
238
265
if (plaintext_capacity == 0){
239
266
perror("adjustbuffer");
287
314
fprintf(stderr, "GnuTLS: %s", string);
288
315
}
289
316
290
static int init_gnutls_global(mandos_context *mc){
317
static int init_gnutls_global(mandos_context *mc,
318
const char *pubkeyfile,
319
const char *seckeyfile){
291
320
int ret;
292
321
293
322
if(debug){
294
323
fprintf(stderr, "Initializing GnuTLS\n");
295
324
}
296
297
if ((ret = gnutls_global_init ())
298
!= GNUTLS_E_SUCCESS) {
325
326
ret = gnutls_global_init();
327
if (ret != GNUTLS_E_SUCCESS) {
299
328
fprintf (stderr, "GnuTLS global_init: %s\n",
300
329
safer_gnutls_strerror(ret));
301
330
return -1;
310
339
}
311
340
312
341
/* OpenPGP credentials */
313
if ((ret = gnutls_certificate_allocate_credentials (&mc->cred))
314
!= GNUTLS_E_SUCCESS) {
342
gnutls_certificate_allocate_credentials(&mc->cred);
343
if (ret != GNUTLS_E_SUCCESS){
315
344
fprintf (stderr, "GnuTLS memory error: %s\n",
316
345
safer_gnutls_strerror(ret));
346
gnutls_global_deinit ();
317
347
return -1;
318
348
}
319
349
331
361
" '%s')\n", ret, pubkeyfile, seckeyfile);
332
362
fprintf(stdout, "The GnuTLS error is: %s\n",
333
363
safer_gnutls_strerror(ret));
334
return -1;
364
goto globalfail;
335
365
}
336
366
337
367
/* GnuTLS server initialization */
339
369
if (ret != GNUTLS_E_SUCCESS) {
340
370
fprintf (stderr, "Error in GnuTLS DH parameter initialization:"
341
371
" %s\n", safer_gnutls_strerror(ret));
342
return -1;
372
goto globalfail;
343
373
}
344
374
ret = gnutls_dh_params_generate2(mc->dh_params, mc->dh_bits);
345
375
if (ret != GNUTLS_E_SUCCESS) {
346
376
fprintf (stderr, "Error in GnuTLS prime generation: %s\n",
347
377
safer_gnutls_strerror(ret));
348
return -1;
378
goto globalfail;
349
379
}
350
380
351
381
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
352
382
353
383
return 0;
384
385
globalfail:
386
387
gnutls_certificate_free_credentials(mc->cred);
388
gnutls_global_deinit();
389
return -1;
390
354
391
}
355
392
356
static int init_gnutls_session(mandos_context *mc, gnutls_session_t *session){
393
static int init_gnutls_session(mandos_context *mc,
394
gnutls_session_t *session){
357
395
int ret;
358
396
/* GnuTLS session creation */
359
397
ret = gnutls_init(session, GNUTLS_SERVER);
369
407
fprintf(stderr, "Syntax error at: %s\n", err);
370
408
fprintf(stderr, "GnuTLS error: %s\n",
371
409
safer_gnutls_strerror(ret));
410
gnutls_deinit (*session);
372
411
return -1;
373
412
}
374
413
}
378
417
if (ret != GNUTLS_E_SUCCESS) {
379
418
fprintf(stderr, "Error setting GnuTLS credentials: %s\n",
380
419
safer_gnutls_strerror(ret));
420
gnutls_deinit (*session);
381
421
return -1;
382
422
}
383
423
399
439
AvahiIfIndex if_index,
400
440
mandos_context *mc){
401
441
int ret, tcp_sd;
402
struct sockaddr_in6 to;
442
union { struct sockaddr in; struct sockaddr_in6 in6; } to;
403
443
char *buffer = NULL;
404
444
char *decrypted_buffer;
405
445
size_t buffer_length = 0;
409
449
int retval = 0;
410
450
char interface[IF_NAMESIZE];
411
451
gnutls_session_t session;
412
gnutls_dh_params_t dh_params;
413
452
414
453
ret = init_gnutls_session (mc, &session);
415
454
if (ret != 0){
417
456
}
418
457
419
458
if(debug){
420
fprintf(stderr, "Setting up a tcp connection to %s, port %d\n",
421
ip, port);
459
fprintf(stderr, "Setting up a tcp connection to %s, port %" PRIu16
460
"\n", ip, port);
422
461
}
423
462
424
463
tcp_sd = socket(PF_INET6, SOCK_STREAM, 0);
436
475
}
437
476
438
477
memset(&to,0,sizeof(to)); /* Spurious warning */
439
to.sin6_family = AF_INET6;
478
to.in6.sin6_family = AF_INET6;
440
479
/* It would be nice to have a way to detect if we were passed an
441
480
IPv4 address here. Now we assume an IPv6 address. */
442
ret = inet_pton(AF_INET6, ip, &to.sin6_addr);
481
ret = inet_pton(AF_INET6, ip, &to.in6.sin6_addr);
443
482
if (ret < 0 ){
444
483
perror("inet_pton");
445
484
return -1;
448
487
fprintf(stderr, "Bad address: %s\n", ip);
449
488
return -1;
450
489
}
451
to.sin6_port = htons(port); /* Spurious warning */
490
to.in6.sin6_port = htons(port); /* Spurious warning */
452
491
453
to.sin6_scope_id = (uint32_t)if_index;
492
to.in6.sin6_scope_id = (uint32_t)if_index;
454
493
455
494
if(debug){
456
fprintf(stderr, "Connection to: %s, port %d\n", ip, port);
495
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
496
port);
457
497
char addrstr[INET6_ADDRSTRLEN] = "";
458
if(inet_ntop(to.sin6_family, &(to.sin6_addr), addrstr,
498
if(inet_ntop(to.in6.sin6_family, &(to.in6.sin6_addr), addrstr,
459
499
sizeof(addrstr)) == NULL){
460
500
perror("inet_ntop");
461
501
} else {
465
505
}
466
506
}
467
507
468
ret = connect(tcp_sd, (struct sockaddr *) &to, sizeof(to));
508
ret = connect(tcp_sd, &to.in, sizeof(to));
469
509
if (ret < 0){
470
510
perror("connect");
471
511
return -1;
500
540
}
501
541
502
542
gnutls_transport_set_ptr (session, (gnutls_transport_ptr_t) tcp_sd);
503
504
ret = gnutls_handshake (session);
543
544
do{
545
ret = gnutls_handshake (session);
546
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
505
547
506
548
if (ret != GNUTLS_E_SUCCESS){
507
549
if(debug){
520
562
}
521
563
522
564
while(true){
523
buffer_capacity = adjustbuffer(&buffer, buffer_length, buffer_capacity);
565
buffer_capacity = adjustbuffer(&buffer, buffer_length,
566
buffer_capacity);
524
567
if (buffer_capacity == 0){
525
568
perror("adjustbuffer");
526
569
retval = -1;
538
581
case GNUTLS_E_AGAIN:
539
582
break;
540
583
case GNUTLS_E_REHANDSHAKE:
541
ret = gnutls_handshake (session);
584
do{
585
ret = gnutls_handshake (session);
586
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
542
587
if (ret < 0){
543
588
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
544
589
gnutls_perror (ret);
597
642
free(buffer);
598
643
close(tcp_sd);
599
644
gnutls_deinit (session);
600
gnutls_certificate_free_credentials (mc->cred);
601
gnutls_global_deinit ();
602
645
return retval;
603
646
}
604
647
635
678
char ip[AVAHI_ADDRESS_STR_MAX];
636
679
avahi_address_snprint(ip, sizeof(ip), address);
637
680
if(debug){
638
fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %d) on"
639
" port %d\n", name, host_name, ip, interface, port);
681
fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %"
682
PRIu16 ") on port %d\n", name, host_name, ip,
683
interface, port);
640
684
}
641
685
int ret = start_mandos_communication(ip, port, interface, mc);
642
686
if (ret == 0){
731
775
gid_t gid;
732
776
char *connect_to = NULL;
733
777
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
778
const char *pubkeyfile = "pubkey.txt";
779
const char *seckeyfile = "seckey.txt";
734
780
mandos_context mc = { .simple_poll = NULL, .server = NULL,
735
781
.dh_bits = 1024, .priority = "SECURE256"};
782
bool gnutls_initalized = false;
736
783
737
784
{
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){
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;
757
826
break;
758
}
759
760
switch(ret){
761
case 0:
827
case 'c':
828
connect_to = arg;
762
829
break;
763
830
case 'i':
764
interface = optarg;
765
break;
766
case 'c':
767
connect_to = optarg;
831
interface = arg;
768
832
break;
769
833
case 'd':
770
keydir = optarg;
834
keydir = arg;
835
break;
836
case 's':
837
seckeyfile = arg;
771
838
break;
772
839
case 'p':
773
pubkeyfile = optarg;
774
break;
775
case 's':
776
seckeyfile = optarg;
777
break;
778
case 'D':
840
pubkeyfile = arg;
841
break;
842
case 129:
779
843
errno = 0;
780
mc.dh_bits = (unsigned int) strtol(optarg, NULL, 10);
844
mc.dh_bits = (unsigned int) strtol(arg, NULL, 10);
781
845
if (errno){
782
846
perror("strtol");
783
847
exit(EXIT_FAILURE);
784
848
}
785
849
break;
786
case 'P':
787
mc.priority = optarg;
788
break;
789
case '?':
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;
790
858
default:
791
/* getopt_long() has already printed a message about the
792
unrcognized option, so just exit. */
793
exit(EXIT_FAILURE);
859
return ARGP_ERR_UNKNOWN;
794
860
}
795
}
796
/* Set the global debug flag from the temporary int */
797
debug = debug_int ? true : false;
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
}
798
874
}
799
875
800
876
pubkeyfile = combinepath(keydir, pubkeyfile);
801
877
if (pubkeyfile == NULL){
802
878
perror("combinepath");
810
886
goto end;
811
887
}
812
888
813
ret = init_gnutls_global(&mc);
889
ret = init_gnutls_global(&mc, pubkeyfile, seckeyfile);
814
890
if (ret == -1){
815
891
fprintf(stderr, "init_gnutls_global\n");
816
892
goto end;
893
} else {
894
gnutls_initalized = true;
817
895
}
818
896
819
897
uid = getuid();
968
1046
avahi_simple_poll_free(mc.simple_poll);
969
1047
free(pubkeyfile);
970
1048
free(seckeyfile);
1049
1050
if (gnutls_initalized){
1051
gnutls_certificate_free_credentials(mc.cred);
1052
gnutls_global_deinit ();
1053
}
971
1054
972
1055
return exitcode;
973
1056
}
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