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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;
90
111
gnutls_certificate_credentials_t cred;
91
112
unsigned int dh_bits;
113
gnutls_dh_params_t dh_params;
92
114
const char *priority;
93
115
} mandos_context;
94
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
*/
95
122
size_t adjustbuffer(char **buffer, size_t buffer_length,
96
123
size_t buffer_capacity){
97
124
if (buffer_length + BUFFER_SIZE > buffer_capacity){
202
229
} else {
203
230
fprintf(stderr, "Unsupported algorithm: %s\n",
204
231
result->unsupported_algorithm);
205
fprintf(stderr, "Wrong key usage: %d\n",
232
fprintf(stderr, "Wrong key usage: %u\n",
206
233
result->wrong_key_usage);
207
234
if(result->file_name != NULL){
208
235
fprintf(stderr, "File name: %s\n", result->file_name);
232
259
233
260
*plaintext = NULL;
234
261
while(true){
235
plaintext_capacity = adjustbuffer(plaintext, (size_t)plaintext_length,
262
plaintext_capacity = adjustbuffer(plaintext,
263
(size_t)plaintext_length,
236
264
plaintext_capacity);
237
265
if (plaintext_capacity == 0){
238
266
perror("adjustbuffer");
286
314
fprintf(stderr, "GnuTLS: %s", string);
287
315
}
288
316
289
static int initgnutls(mandos_context *mc, gnutls_session_t *session,
290
gnutls_dh_params_t *dh_params){
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 */
338
ret = gnutls_dh_params_init(dh_params);
368
ret = gnutls_dh_params_init(&mc->dh_params);
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
ret = gnutls_dh_params_generate2(*dh_params, mc->dh_bits);
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
gnutls_certificate_set_dh_params(mc->cred, *dh_params);
352
381
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
382
383
return 0;
384
385
globalfail:
386
387
gnutls_certificate_free_credentials(mc->cred);
388
gnutls_global_deinit();
389
return -1;
390
391
}
392
393
static int init_gnutls_session(mandos_context *mc,
394
gnutls_session_t *session){
395
int ret;
353
396
/* GnuTLS session creation */
354
397
ret = gnutls_init(session, GNUTLS_SERVER);
355
398
if (ret != GNUTLS_E_SUCCESS){
364
407
fprintf(stderr, "Syntax error at: %s\n", err);
365
408
fprintf(stderr, "GnuTLS error: %s\n",
366
409
safer_gnutls_strerror(ret));
410
gnutls_deinit (*session);
367
411
return -1;
368
412
}
369
413
}
373
417
if (ret != GNUTLS_E_SUCCESS) {
374
418
fprintf(stderr, "Error setting GnuTLS credentials: %s\n",
375
419
safer_gnutls_strerror(ret));
420
gnutls_deinit (*session);
376
421
return -1;
377
422
}
378
423
394
439
AvahiIfIndex if_index,
395
440
mandos_context *mc){
396
441
int ret, tcp_sd;
397
struct sockaddr_in6 to;
442
union { struct sockaddr in; struct sockaddr_in6 in6; } to;
398
443
char *buffer = NULL;
399
444
char *decrypted_buffer;
400
445
size_t buffer_length = 0;
404
449
int retval = 0;
405
450
char interface[IF_NAMESIZE];
406
451
gnutls_session_t session;
407
gnutls_dh_params_t dh_params;
408
452
409
ret = initgnutls (mc, &session, &dh_params);
453
ret = init_gnutls_session (mc, &session);
410
454
if (ret != 0){
411
455
return -1;
412
456
}
413
457
414
458
if(debug){
415
fprintf(stderr, "Setting up a tcp connection to %s, port %d\n",
416
ip, port);
459
fprintf(stderr, "Setting up a tcp connection to %s, port %" PRIu16
460
"\n", ip, port);
417
461
}
418
462
419
463
tcp_sd = socket(PF_INET6, SOCK_STREAM, 0);
431
475
}
432
476
433
477
memset(&to,0,sizeof(to)); /* Spurious warning */
434
to.sin6_family = AF_INET6;
478
to.in6.sin6_family = AF_INET6;
435
479
/* It would be nice to have a way to detect if we were passed an
436
480
IPv4 address here. Now we assume an IPv6 address. */
437
ret = inet_pton(AF_INET6, ip, &to.sin6_addr);
481
ret = inet_pton(AF_INET6, ip, &to.in6.sin6_addr);
438
482
if (ret < 0 ){
439
483
perror("inet_pton");
440
484
return -1;
443
487
fprintf(stderr, "Bad address: %s\n", ip);
444
488
return -1;
445
489
}
446
to.sin6_port = htons(port); /* Spurious warning */
490
to.in6.sin6_port = htons(port); /* Spurious warning */
447
491
448
to.sin6_scope_id = (uint32_t)if_index;
492
to.in6.sin6_scope_id = (uint32_t)if_index;
449
493
450
494
if(debug){
451
fprintf(stderr, "Connection to: %s, port %d\n", ip, port);
495
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
496
port);
452
497
char addrstr[INET6_ADDRSTRLEN] = "";
453
if(inet_ntop(to.sin6_family, &(to.sin6_addr), addrstr,
498
if(inet_ntop(to.in6.sin6_family, &(to.in6.sin6_addr), addrstr,
454
499
sizeof(addrstr)) == NULL){
455
500
perror("inet_ntop");
456
501
} else {
460
505
}
461
506
}
462
507
463
ret = connect(tcp_sd, (struct sockaddr *) &to, sizeof(to));
508
ret = connect(tcp_sd, &to.in, sizeof(to));
464
509
if (ret < 0){
465
510
perror("connect");
466
511
return -1;
495
540
}
496
541
497
542
gnutls_transport_set_ptr (session, (gnutls_transport_ptr_t) tcp_sd);
498
499
ret = gnutls_handshake (session);
543
544
do{
545
ret = gnutls_handshake (session);
546
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
500
547
501
548
if (ret != GNUTLS_E_SUCCESS){
502
549
if(debug){
515
562
}
516
563
517
564
while(true){
518
buffer_capacity = adjustbuffer(&buffer, buffer_length, buffer_capacity);
565
buffer_capacity = adjustbuffer(&buffer, buffer_length,
566
buffer_capacity);
519
567
if (buffer_capacity == 0){
520
568
perror("adjustbuffer");
521
569
retval = -1;
533
581
case GNUTLS_E_AGAIN:
534
582
break;
535
583
case GNUTLS_E_REHANDSHAKE:
536
ret = gnutls_handshake (session);
584
do{
585
ret = gnutls_handshake (session);
586
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
537
587
if (ret < 0){
538
588
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
539
589
gnutls_perror (ret);
592
642
free(buffer);
593
643
close(tcp_sd);
594
644
gnutls_deinit (session);
595
gnutls_certificate_free_credentials (mc->cred);
596
gnutls_global_deinit ();
597
645
return retval;
598
646
}
599
647
630
678
char ip[AVAHI_ADDRESS_STR_MAX];
631
679
avahi_address_snprint(ip, sizeof(ip), address);
632
680
if(debug){
633
fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %d) on"
634
" 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);
635
684
}
636
685
int ret = start_mandos_communication(ip, port, interface, mc);
637
686
if (ret == 0){
722
771
const char *interface = "eth0";
723
772
struct ifreq network;
724
773
int sd;
774
uid_t uid;
775
gid_t gid;
725
776
char *connect_to = NULL;
726
777
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
778
const char *pubkeyfile = "pubkey.txt";
779
const char *seckeyfile = "seckey.txt";
727
780
mandos_context mc = { .simple_poll = NULL, .server = NULL,
728
781
.dh_bits = 1024, .priority = "SECURE256"};
782
bool gnutls_initalized = false;
729
783
730
784
{
731
/* Temporary int to get the address of for getopt_long */
732
int debug_int = debug ? 1 : 0;
733
while (true){
734
struct option long_options[] = {
735
{"debug", no_argument, &debug_int, 1},
736
{"connect", required_argument, NULL, 'c'},
737
{"interface", required_argument, NULL, 'i'},
738
{"keydir", required_argument, NULL, 'd'},
739
{"seckey", required_argument, NULL, 's'},
740
{"pubkey", required_argument, NULL, 'p'},
741
{"dh-bits", required_argument, NULL, 'D'},
742
{"priority", required_argument, NULL, 'P'},
743
{0, 0, 0, 0} };
744
745
int option_index = 0;
746
ret = getopt_long (argc, argv, "i:", long_options,
747
&option_index);
748
749
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;
750
826
break;
751
}
752
753
switch(ret){
754
case 0:
827
case 'c':
828
connect_to = arg;
755
829
break;
756
830
case 'i':
757
interface = optarg;
758
break;
759
case 'c':
760
connect_to = optarg;
831
interface = arg;
761
832
break;
762
833
case 'd':
763
keydir = optarg;
834
keydir = arg;
835
break;
836
case 's':
837
seckeyfile = arg;
764
838
break;
765
839
case 'p':
766
pubkeyfile = optarg;
767
break;
768
case 's':
769
seckeyfile = optarg;
770
break;
771
case 'D':
840
pubkeyfile = arg;
841
break;
842
case 129:
772
843
errno = 0;
773
mc.dh_bits = (unsigned int) strtol(optarg, NULL, 10);
844
mc.dh_bits = (unsigned int) strtol(arg, NULL, 10);
774
845
if (errno){
775
846
perror("strtol");
776
847
exit(EXIT_FAILURE);
777
848
}
778
849
break;
779
case 'P':
780
mc.priority = optarg;
781
break;
782
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;
783
858
default:
784
/* getopt_long() has already printed a message about the
785
unrcognized option, so just exit. */
786
exit(EXIT_FAILURE);
859
return ARGP_ERR_UNKNOWN;
787
860
}
788
}
789
/* Set the global debug flag from the temporary int */
790
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
}
791
874
}
792
875
793
876
pubkeyfile = combinepath(keydir, pubkeyfile);
794
877
if (pubkeyfile == NULL){
795
878
perror("combinepath");
802
885
perror("combinepath");
803
886
goto end;
804
887
}
888
889
ret = init_gnutls_global(&mc, pubkeyfile, seckeyfile);
890
if (ret == -1){
891
fprintf(stderr, "init_gnutls_global\n");
892
goto end;
893
} else {
894
gnutls_initalized = true;
895
}
896
897
uid = getuid();
898
gid = getgid();
899
900
ret = setuid(uid);
901
if (ret == -1){
902
perror("setuid");
903
}
904
905
setgid(gid);
906
if (ret == -1){
907
perror("setgid");
908
}
805
909
806
910
if_index = (AvahiIfIndex) if_nametoindex(interface);
807
911
if(if_index == 0){
815
919
char *address = strrchr(connect_to, ':');
816
920
if(address == NULL){
817
921
fprintf(stderr, "No colon in address\n");
818
exit(EXIT_FAILURE);
922
exitcode = EXIT_FAILURE;
923
goto end;
819
924
}
820
925
errno = 0;
821
926
uint16_t port = (uint16_t) strtol(address+1, NULL, 10);
822
927
if(errno){
823
928
perror("Bad port number");
824
exit(EXIT_FAILURE);
929
exitcode = EXIT_FAILURE;
930
goto end;
825
931
}
826
932
*address = '\0';
827
933
address = connect_to;
828
934
ret = start_mandos_communication(address, port, if_index, &mc);
829
935
if(ret < 0){
830
exit(EXIT_FAILURE);
936
exitcode = EXIT_FAILURE;
831
937
} else {
832
exit(EXIT_SUCCESS);
938
exitcode = EXIT_SUCCESS;
833
939
}
940
goto end;
834
941
}
835
942
836
943
/* If the interface is down, bring it up */
939
1046
avahi_simple_poll_free(mc.simple_poll);
940
1047
free(pubkeyfile);
941
1048
free(seckeyfile);
1049
1050
if (gnutls_initalized){
1051
gnutls_certificate_free_credentials(mc.cred);
1052
gnutls_global_deinit ();
1053
}
942
1054
943
1055
return exitcode;
944
1056
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0