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- Committer: Björn Påhlsson
- Date: 2008-08-10 00:21:08 UTC
- mto: (237.7.1 mandos) (24.1.154 mandos)
- mto: This revision was merged to the branch mainline in revision 59.
- Revision ID: belorn@braxen-20080810002108-ye1e88yto19lsctt
name change for argp
- 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 <sys/socket.h> /* socket(), struct sockaddr_in6,
54
struct in6_addr, inet_pton(),
55
connect() */
56
#include <assert.h> /* assert() */
57
#include <errno.h> /* perror(), errno */
58
#include <time.h> /* time() */
44
59
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
45
SIOCSIFFLAGS */
60
SIOCSIFFLAGS, if_indextoname(),
61
if_nametoindex(), IF_NAMESIZE */
62
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
63
getuid(), getgid(), setuid(),
64
setgid() */
65
#include <netinet/in.h>
66
#include <arpa/inet.h> /* inet_pton(), htons */
67
#include <iso646.h> /* not, and */
68
#include <argp.h> /* struct argp_option, error_t, struct
69
argp_state, struct argp,
70
argp_parse(), ARGP_KEY_ARG,
71
ARGP_KEY_END, ARGP_ERR_UNKNOWN */
46
72
73
/* Avahi */
74
/* All Avahi types, constants and functions
75
Avahi*, avahi_*,
76
AVAHI_* */
47
77
#include <avahi-core/core.h>
48
78
#include <avahi-core/lookup.h>
49
79
#include <avahi-core/log.h>
51
81
#include <avahi-common/malloc.h>
52
82
#include <avahi-common/error.h>
53
83
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 */
84
/* GnuTLS */
85
#include <gnutls/gnutls.h> /* All GnuTLS types, constants and functions
86
gnutls_*
87
init_gnutls_session(),
88
GNUTLS_* */
89
#include <gnutls/openpgp.h> /* gnutls_certificate_set_openpgp_key_file(),
90
GNUTLS_OPENPGP_FMT_BASE64 */
68
91
69
92
/* GPGME */
70
#include <errno.h> /* perror() */
71
#include <gpgme.h>
72
73
/* getopt_long */
74
#include <getopt.h>
93
#include <gpgme.h> /* All GPGME types, constants and functions
94
gpgme_*
95
GPGME_PROTOCOL_OpenPGP,
96
GPG_ERR_NO_* */
75
97
76
98
#define BUFFER_SIZE 256
77
99
100
bool debug = false;
78
101
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 */
102
static const char mandos_protocol_version[] = "1";
103
const char *argp_program_version = "password-request 1.0";
104
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
105
106
/* Used for passing in values through the Avahi callback functions */
87
107
typedef struct {
88
108
AvahiSimplePoll *simple_poll;
89
109
AvahiServer *server;
93
113
const char *priority;
94
114
} mandos_context;
95
115
116
/*
117
* Make room in "buffer" for at least BUFFER_SIZE additional bytes.
118
* "buffer_capacity" is how much is currently allocated,
119
* "buffer_length" is how much is already used.
120
*/
96
121
size_t adjustbuffer(char **buffer, size_t buffer_length,
97
122
size_t buffer_capacity){
98
123
if (buffer_length + BUFFER_SIZE > buffer_capacity){
233
258
234
259
*plaintext = NULL;
235
260
while(true){
236
plaintext_capacity = adjustbuffer(plaintext, (size_t)plaintext_length,
261
plaintext_capacity = adjustbuffer(plaintext,
262
(size_t)plaintext_length,
237
263
plaintext_capacity);
238
264
if (plaintext_capacity == 0){
239
265
perror("adjustbuffer");
287
313
fprintf(stderr, "GnuTLS: %s", string);
288
314
}
289
315
290
static int init_gnutls_global(mandos_context *mc){
316
static int init_gnutls_global(mandos_context *mc,
317
const char *pubkeyfile,
318
const char *seckeyfile){
291
319
int ret;
292
320
293
321
if(debug){
294
322
fprintf(stderr, "Initializing GnuTLS\n");
295
323
}
296
297
if ((ret = gnutls_global_init ())
298
!= GNUTLS_E_SUCCESS) {
324
325
ret = gnutls_global_init();
326
if (ret != GNUTLS_E_SUCCESS) {
299
327
fprintf (stderr, "GnuTLS global_init: %s\n",
300
328
safer_gnutls_strerror(ret));
301
329
return -1;
310
338
}
311
339
312
340
/* OpenPGP credentials */
313
if ((ret = gnutls_certificate_allocate_credentials (&mc->cred))
314
!= GNUTLS_E_SUCCESS) {
341
gnutls_certificate_allocate_credentials(&mc->cred);
342
if (ret != GNUTLS_E_SUCCESS){
315
343
fprintf (stderr, "GnuTLS memory error: %s\n",
316
344
safer_gnutls_strerror(ret));
345
gnutls_global_deinit ();
317
346
return -1;
318
347
}
319
348
331
360
" '%s')\n", ret, pubkeyfile, seckeyfile);
332
361
fprintf(stdout, "The GnuTLS error is: %s\n",
333
362
safer_gnutls_strerror(ret));
334
return -1;
363
goto globalfail;
335
364
}
336
365
337
366
/* GnuTLS server initialization */
339
368
if (ret != GNUTLS_E_SUCCESS) {
340
369
fprintf (stderr, "Error in GnuTLS DH parameter initialization:"
341
370
" %s\n", safer_gnutls_strerror(ret));
342
return -1;
371
goto globalfail;
343
372
}
344
373
ret = gnutls_dh_params_generate2(mc->dh_params, mc->dh_bits);
345
374
if (ret != GNUTLS_E_SUCCESS) {
346
375
fprintf (stderr, "Error in GnuTLS prime generation: %s\n",
347
376
safer_gnutls_strerror(ret));
348
return -1;
377
goto globalfail;
349
378
}
350
379
351
380
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
352
381
353
382
return 0;
383
384
globalfail:
385
386
gnutls_certificate_free_credentials(mc->cred);
387
gnutls_global_deinit();
388
return -1;
389
354
390
}
355
391
356
static int init_gnutls_session(mandos_context *mc, gnutls_session_t *session){
392
static int init_gnutls_session(mandos_context *mc,
393
gnutls_session_t *session){
357
394
int ret;
358
395
/* GnuTLS session creation */
359
396
ret = gnutls_init(session, GNUTLS_SERVER);
369
406
fprintf(stderr, "Syntax error at: %s\n", err);
370
407
fprintf(stderr, "GnuTLS error: %s\n",
371
408
safer_gnutls_strerror(ret));
409
gnutls_deinit (*session);
372
410
return -1;
373
411
}
374
412
}
378
416
if (ret != GNUTLS_E_SUCCESS) {
379
417
fprintf(stderr, "Error setting GnuTLS credentials: %s\n",
380
418
safer_gnutls_strerror(ret));
419
gnutls_deinit (*session);
381
420
return -1;
382
421
}
383
422
399
438
AvahiIfIndex if_index,
400
439
mandos_context *mc){
401
440
int ret, tcp_sd;
402
struct sockaddr_in6 to;
441
union { struct sockaddr in; struct sockaddr_in6 in6; } to;
403
442
char *buffer = NULL;
404
443
char *decrypted_buffer;
405
444
size_t buffer_length = 0;
409
448
int retval = 0;
410
449
char interface[IF_NAMESIZE];
411
450
gnutls_session_t session;
412
gnutls_dh_params_t dh_params;
413
451
414
452
ret = init_gnutls_session (mc, &session);
415
453
if (ret != 0){
436
474
}
437
475
438
476
memset(&to,0,sizeof(to)); /* Spurious warning */
439
to.sin6_family = AF_INET6;
477
to.in6.sin6_family = AF_INET6;
440
478
/* It would be nice to have a way to detect if we were passed an
441
479
IPv4 address here. Now we assume an IPv6 address. */
442
ret = inet_pton(AF_INET6, ip, &to.sin6_addr);
480
ret = inet_pton(AF_INET6, ip, &to.in6.sin6_addr);
443
481
if (ret < 0 ){
444
482
perror("inet_pton");
445
483
return -1;
448
486
fprintf(stderr, "Bad address: %s\n", ip);
449
487
return -1;
450
488
}
451
to.sin6_port = htons(port); /* Spurious warning */
489
to.in6.sin6_port = htons(port); /* Spurious warning */
452
490
453
to.sin6_scope_id = (uint32_t)if_index;
491
to.in6.sin6_scope_id = (uint32_t)if_index;
454
492
455
493
if(debug){
456
494
fprintf(stderr, "Connection to: %s, port %d\n", ip, port);
457
495
char addrstr[INET6_ADDRSTRLEN] = "";
458
if(inet_ntop(to.sin6_family, &(to.sin6_addr), addrstr,
496
if(inet_ntop(to.in6.sin6_family, &(to.in6.sin6_addr), addrstr,
459
497
sizeof(addrstr)) == NULL){
460
498
perror("inet_ntop");
461
499
} else {
465
503
}
466
504
}
467
505
468
ret = connect(tcp_sd, (struct sockaddr *) &to, sizeof(to));
506
ret = connect(tcp_sd, &to.in, sizeof(to));
469
507
if (ret < 0){
470
508
perror("connect");
471
509
return -1;
500
538
}
501
539
502
540
gnutls_transport_set_ptr (session, (gnutls_transport_ptr_t) tcp_sd);
503
504
ret = gnutls_handshake (session);
541
542
do{
543
ret = gnutls_handshake (session);
544
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
505
545
506
546
if (ret != GNUTLS_E_SUCCESS){
507
547
if(debug){
520
560
}
521
561
522
562
while(true){
523
buffer_capacity = adjustbuffer(&buffer, buffer_length, buffer_capacity);
563
buffer_capacity = adjustbuffer(&buffer, buffer_length,
564
buffer_capacity);
524
565
if (buffer_capacity == 0){
525
566
perror("adjustbuffer");
526
567
retval = -1;
538
579
case GNUTLS_E_AGAIN:
539
580
break;
540
581
case GNUTLS_E_REHANDSHAKE:
541
ret = gnutls_handshake (session);
582
do{
583
ret = gnutls_handshake (session);
584
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
542
585
if (ret < 0){
543
586
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
544
587
gnutls_perror (ret);
597
640
free(buffer);
598
641
close(tcp_sd);
599
642
gnutls_deinit (session);
600
gnutls_certificate_free_credentials (mc->cred);
601
gnutls_global_deinit ();
602
643
return retval;
603
644
}
604
645
731
772
gid_t gid;
732
773
char *connect_to = NULL;
733
774
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
775
const char *pubkeyfile = "pubkey.txt";
776
const char *seckeyfile = "seckey.txt";
734
777
mandos_context mc = { .simple_poll = NULL, .server = NULL,
735
778
.dh_bits = 1024, .priority = "SECURE256"};
779
bool gnutls_initalized = false;
736
780
737
781
{
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){
782
struct argp_option options[] = {
783
{ .name = "debug", .key = 128,
784
.doc = "Debug mode", .group = 3 },
785
{ .name = "connect", .key = 'c',
786
.arg = "IP",
787
.doc = "Connect directly to a sepcified mandos server",
788
.group = 1 },
789
{ .name = "interface", .key = 'i',
790
.arg = "INTERFACE",
791
.doc = "Interface that Avahi will conntect through",
792
.group = 1 },
793
{ .name = "keydir", .key = 'd',
794
.arg = "KEYDIR",
795
.doc = "Directory where the openpgp keyring is",
796
.group = 1 },
797
{ .name = "seckey", .key = 's',
798
.arg = "SECKEY",
799
.doc = "Secret openpgp key for gnutls authentication",
800
.group = 1 },
801
{ .name = "pubkey", .key = 'p',
802
.arg = "PUBKEY",
803
.doc = "Public openpgp key for gnutls authentication",
804
.group = 2 },
805
{ .name = "dh-bits", .key = 129,
806
.arg = "BITS",
807
.doc = "dh-bits to use in gnutls communication",
808
.group = 2 },
809
{ .name = "priority", .key = 130,
810
.arg = "PRIORITY",
811
.doc = "GNUTLS priority", .group = 1 },
812
{ .name = NULL }
813
};
814
815
816
error_t parse_opt (int key, char *arg,
817
struct argp_state *state) {
818
/* Get the INPUT argument from `argp_parse', which we know is
819
a pointer to our plugin list pointer. */
820
switch (key) {
821
case 128:
822
debug = true;
757
823
break;
758
}
759
760
switch(ret){
761
case 0:
824
case 'c':
825
connect_to = arg;
762
826
break;
763
827
case 'i':
764
interface = optarg;
765
break;
766
case 'c':
767
connect_to = optarg;
828
interface = arg;
768
829
break;
769
830
case 'd':
770
keydir = optarg;
831
keydir = arg;
832
break;
833
case 's':
834
seckeyfile = arg;
771
835
break;
772
836
case 'p':
773
pubkeyfile = optarg;
774
break;
775
case 's':
776
seckeyfile = optarg;
777
break;
778
case 'D':
837
pubkeyfile = arg;
838
break;
839
case 129:
779
840
errno = 0;
780
mc.dh_bits = (unsigned int) strtol(optarg, NULL, 10);
841
mc.dh_bits = (unsigned int) strtol(arg, NULL, 10);
781
842
if (errno){
782
843
perror("strtol");
783
844
exit(EXIT_FAILURE);
784
845
}
785
846
break;
786
case 'P':
787
mc.priority = optarg;
788
break;
789
case '?':
847
case 130:
848
mc.priority = arg;
849
break;
850
case ARGP_KEY_ARG:
851
argp_usage (state);
852
break;
853
case ARGP_KEY_END:
854
break;
790
855
default:
791
/* getopt_long() has already printed a message about the
792
unrcognized option, so just exit. */
793
exit(EXIT_FAILURE);
856
return ARGP_ERR_UNKNOWN;
794
857
}
795
}
796
/* Set the global debug flag from the temporary int */
797
debug = debug_int ? true : false;
858
return 0;
859
}
860
861
struct argp argp = { .options = options, .parser = parse_opt,
862
.args_doc = "",
863
.doc = "Mandos client -- Get and decrypt"
864
" passwords from mandos server" };
865
ret = argp_parse (&argp, argc, argv, 0, 0, NULL);
866
if (ret == ARGP_ERR_UNKNOWN){
867
fprintf(stderr, "Unkown error while parsing arguments\n");
868
exitcode = EXIT_FAILURE;
869
goto end;
870
}
798
871
}
799
872
800
873
pubkeyfile = combinepath(keydir, pubkeyfile);
801
874
if (pubkeyfile == NULL){
802
875
perror("combinepath");
810
883
goto end;
811
884
}
812
885
813
ret = init_gnutls_global(&mc);
886
ret = init_gnutls_global(&mc, pubkeyfile, seckeyfile);
814
887
if (ret == -1){
815
888
fprintf(stderr, "init_gnutls_global\n");
816
889
goto end;
890
} else {
891
gnutls_initalized = true;
817
892
}
818
893
819
894
uid = getuid();
968
1043
avahi_simple_poll_free(mc.simple_poll);
969
1044
free(pubkeyfile);
970
1045
free(seckeyfile);
1046
1047
if (gnutls_initalized){
1048
gnutls_certificate_free_credentials(mc.cred);
1049
gnutls_global_deinit ();
1050
}
971
1051
972
1052
return exitcode;
973
1053
}
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