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- Committer: Teddy Hogeborn
- Date: 2008-08-17 20:34:18 UTC
- Revision ID: teddy@fukt.bsnet.se-20080817203418-l691ahxyc7vmezad
* Makefile (MANPOST): Bug fix: do not replace *all* "een" with "en".
* mandos.xml: More improvements. Replaced " with <quote>'s.
(NETWORK PROTOCOL): Replaced <informaltable> with <table> with a
<title>.
(CHECKING): New section describing the continual checking of
clients.
(LOGGING): We log to /dev/log, not syslog(3).
(FILES): Changed to use a <variablelist> instead of an
<itemizedlist>. Added "/dev/log" and brief descriptions of
all files.
(BUGS): Added content.
(EXAMPLES): - '' -
(SECURITY): Added content to subsections "SERVER" and "CLIENTS".
* mandos.xml: More improvements. Replaced " with <quote>'s.
(NETWORK PROTOCOL): Replaced <informaltable> with <table> with a
<title>.
(CHECKING): New section describing the continual checking of
clients.
(LOGGING): We log to /dev/log, not syslog(3).
(FILES): Changed to use a <variablelist> instead of an
<itemizedlist>. Added "/dev/log" and brief descriptions of
all files.
(BUGS): Added content.
(EXAMPLES): - '' -
(SECURITY): Added content to subsections "SERVER" and "CLIENTS".
- files added:
- COPYING
- files removed:
- ca.pem
- files renamed:
- server.py => mandos
- server.conf => mandos.conf
- plugbasedclient.c => plugin-runner.c
- 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
32
32
#define _LARGEFILE_SOURCE
33
33
#define _FILE_OFFSET_BITS 64
34
34
35
#include <stdio.h>
36
#include <assert.h>
37
#include <stdlib.h>
38
#include <time.h>
39
#include <net/if.h> /* if_nametoindex */
40
#include <sys/ioctl.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
41
SIOCSIFFLAGS */
35
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), asprintf() */
36
37
#include <stdio.h> /* fprintf(), stderr, fwrite(),
38
stdout, 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(), asprintf(), strcpy() */
46
#include <sys/ioctl.h> /* ioctl */
47
#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 */
52
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
53
struct in6_addr, inet_pton(),
54
connect() */
55
#include <assert.h> /* assert() */
56
#include <errno.h> /* perror(), errno */
57
#include <time.h> /* time() */
42
58
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
43
SIOCSIFFLAGS */
59
SIOCSIFFLAGS, if_indextoname(),
60
if_nametoindex(), IF_NAMESIZE */
61
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
62
getuid(), getgid(), setuid(),
63
setgid() */
64
#include <netinet/in.h>
65
#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 */
44
71
72
/* Avahi */
73
/* All Avahi types, constants and functions
74
Avahi*, avahi_*,
75
AVAHI_* */
45
76
#include <avahi-core/core.h>
46
77
#include <avahi-core/lookup.h>
47
78
#include <avahi-core/log.h>
49
80
#include <avahi-common/malloc.h>
50
81
#include <avahi-common/error.h>
51
82
52
//mandos client part
53
#include <sys/types.h> /* socket(), inet_pton() */
54
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
55
struct in6_addr, inet_pton() */
56
#include <gnutls/gnutls.h> /* All GnuTLS stuff */
57
#include <gnutls/openpgp.h> /* GnuTLS with openpgp stuff */
58
59
#include <unistd.h> /* close() */
60
#include <netinet/in.h>
61
#include <stdbool.h> /* true */
62
#include <string.h> /* memset */
63
#include <arpa/inet.h> /* inet_pton() */
64
#include <iso646.h> /* not */
65
66
// gpgme
67
#include <errno.h> /* perror() */
68
#include <gpgme.h>
69
70
// getopt_long
71
#include <getopt.h>
83
/* GnuTLS */
84
#include <gnutls/gnutls.h> /* All GnuTLS types, constants and
85
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 */
91
92
/* GPGME */
93
#include <gpgme.h> /* All GPGME types, constants and
94
functions:
95
gpgme_*
96
GPGME_PROTOCOL_OpenPGP,
97
GPG_ERR_NO_* */
72
98
73
99
#define BUFFER_SIZE 256
74
100
101
bool debug = false;
75
102
static const char *keydir = "/conf/conf.d/mandos";
76
static const char *pubkeyfile = "pubkey.txt";
77
static const char *seckeyfile = "seckey.txt";
78
79
bool debug = false;
80
81
/* 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 */
82
108
typedef struct {
83
109
AvahiSimplePoll *simple_poll;
84
110
AvahiServer *server;
85
111
gnutls_certificate_credentials_t cred;
86
112
unsigned int dh_bits;
113
gnutls_dh_params_t dh_params;
87
114
const char *priority;
88
115
} mandos_context;
89
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
*/
122
size_t adjustbuffer(char **buffer, size_t buffer_length,
123
size_t buffer_capacity){
124
if (buffer_length + BUFFER_SIZE > buffer_capacity){
125
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
126
if (buffer == NULL){
127
return 0;
128
}
129
buffer_capacity += BUFFER_SIZE;
130
}
131
return buffer_capacity;
132
}
133
90
134
/*
91
135
* Decrypt OpenPGP data using keyrings in HOMEDIR.
92
136
* Returns -1 on error
99
143
gpgme_ctx_t ctx;
100
144
gpgme_error_t rc;
101
145
ssize_t ret;
102
ssize_t plaintext_capacity = 0;
146
size_t plaintext_capacity = 0;
103
147
ssize_t plaintext_length = 0;
104
148
gpgme_engine_info_t engine_info;
105
149
185
229
} else {
186
230
fprintf(stderr, "Unsupported algorithm: %s\n",
187
231
result->unsupported_algorithm);
188
fprintf(stderr, "Wrong key usage: %d\n",
232
fprintf(stderr, "Wrong key usage: %u\n",
189
233
result->wrong_key_usage);
190
234
if(result->file_name != NULL){
191
235
fprintf(stderr, "File name: %s\n", result->file_name);
215
259
216
260
*plaintext = NULL;
217
261
while(true){
218
if (plaintext_length + BUFFER_SIZE > plaintext_capacity){
219
*plaintext = realloc(*plaintext,
220
(unsigned int)plaintext_capacity
221
+ BUFFER_SIZE);
222
if (*plaintext == NULL){
223
perror("realloc");
262
plaintext_capacity = adjustbuffer(plaintext,
263
(size_t)plaintext_length,
264
plaintext_capacity);
265
if (plaintext_capacity == 0){
266
perror("adjustbuffer");
224
267
plaintext_length = -1;
225
268
goto decrypt_end;
226
}
227
plaintext_capacity += BUFFER_SIZE;
228
269
}
229
270
230
271
ret = gpgme_data_read(dh_plain, *plaintext + plaintext_length,
244
285
245
286
if(debug){
246
287
fprintf(stderr, "Decrypted password is: ");
247
for(size_t i = 0; i < plaintext_length; i++){
288
for(ssize_t i = 0; i < plaintext_length; i++){
248
289
fprintf(stderr, "%02hhX ", (*plaintext)[i]);
249
290
}
250
291
fprintf(stderr, "\n");
267
308
return ret;
268
309
}
269
310
311
/* GnuTLS log function callback */
270
312
static void debuggnutls(__attribute__((unused)) int level,
271
313
const char* string){
272
fprintf(stderr, "%s", string);
314
fprintf(stderr, "GnuTLS: %s", string);
273
315
}
274
316
275
static int initgnutls(mandos_context *mc, gnutls_session_t *session,
276
gnutls_dh_params_t *dh_params){
277
const char *err;
317
static int init_gnutls_global(mandos_context *mc,
318
const char *pubkeyfilename,
319
const char *seckeyfilename){
278
320
int ret;
279
321
280
322
if(debug){
281
323
fprintf(stderr, "Initializing GnuTLS\n");
282
324
}
283
284
if ((ret = gnutls_global_init ())
285
!= GNUTLS_E_SUCCESS) {
286
fprintf (stderr, "global_init: %s\n", safer_gnutls_strerror(ret));
325
326
ret = gnutls_global_init();
327
if (ret != GNUTLS_E_SUCCESS) {
328
fprintf (stderr, "GnuTLS global_init: %s\n",
329
safer_gnutls_strerror(ret));
287
330
return -1;
288
331
}
289
332
290
333
if (debug){
334
/* "Use a log level over 10 to enable all debugging options."
335
* - GnuTLS manual
336
*/
291
337
gnutls_global_set_log_level(11);
292
338
gnutls_global_set_log_function(debuggnutls);
293
339
}
294
340
295
/* openpgp credentials */
296
if ((ret = gnutls_certificate_allocate_credentials (&mc->cred))
297
!= GNUTLS_E_SUCCESS) {
298
fprintf (stderr, "memory error: %s\n",
341
/* OpenPGP credentials */
342
gnutls_certificate_allocate_credentials(&mc->cred);
343
if (ret != GNUTLS_E_SUCCESS){
344
fprintf (stderr, "GnuTLS memory error: %s\n",
299
345
safer_gnutls_strerror(ret));
346
gnutls_global_deinit ();
300
347
return -1;
301
348
}
302
349
303
350
if(debug){
304
351
fprintf(stderr, "Attempting to use OpenPGP certificate %s"
305
" and keyfile %s as GnuTLS credentials\n", pubkeyfile,
306
seckeyfile);
352
" and keyfile %s as GnuTLS credentials\n", pubkeyfilename,
353
seckeyfilename);
307
354
}
308
355
309
356
ret = gnutls_certificate_set_openpgp_key_file
310
(mc->cred, pubkeyfile, seckeyfile, GNUTLS_OPENPGP_FMT_BASE64);
357
(mc->cred, pubkeyfilename, seckeyfilename,
358
GNUTLS_OPENPGP_FMT_BASE64);
311
359
if (ret != GNUTLS_E_SUCCESS) {
312
fprintf
313
(stderr, "Error[%d] while reading the OpenPGP key pair ('%s',"
314
" '%s')\n",
315
ret, pubkeyfile, seckeyfile);
316
fprintf(stdout, "The Error is: %s\n",
360
fprintf(stderr,
361
"Error[%d] while reading the OpenPGP key pair ('%s',"
362
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
363
fprintf(stdout, "The GnuTLS error is: %s\n",
317
364
safer_gnutls_strerror(ret));
318
return -1;
319
}
320
321
//GnuTLS server initialization
322
if ((ret = gnutls_dh_params_init(dh_params))
323
!= GNUTLS_E_SUCCESS) {
324
fprintf (stderr, "Error in dh parameter initialization: %s\n",
325
safer_gnutls_strerror(ret));
326
return -1;
327
}
328
329
if ((ret = gnutls_dh_params_generate2(*dh_params, mc->dh_bits))
330
!= GNUTLS_E_SUCCESS) {
331
fprintf (stderr, "Error in prime generation: %s\n",
332
safer_gnutls_strerror(ret));
333
return -1;
334
}
335
336
gnutls_certificate_set_dh_params(mc->cred, *dh_params);
337
338
// GnuTLS session creation
339
if ((ret = gnutls_init(session, GNUTLS_SERVER))
340
!= GNUTLS_E_SUCCESS){
365
goto globalfail;
366
}
367
368
/* GnuTLS server initialization */
369
ret = gnutls_dh_params_init(&mc->dh_params);
370
if (ret != GNUTLS_E_SUCCESS) {
371
fprintf (stderr, "Error in GnuTLS DH parameter initialization:"
372
" %s\n", safer_gnutls_strerror(ret));
373
goto globalfail;
374
}
375
ret = gnutls_dh_params_generate2(mc->dh_params, mc->dh_bits);
376
if (ret != GNUTLS_E_SUCCESS) {
377
fprintf (stderr, "Error in GnuTLS prime generation: %s\n",
378
safer_gnutls_strerror(ret));
379
goto globalfail;
380
}
381
382
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
383
384
return 0;
385
386
globalfail:
387
388
gnutls_certificate_free_credentials(mc->cred);
389
gnutls_global_deinit();
390
return -1;
391
392
}
393
394
static int init_gnutls_session(mandos_context *mc,
395
gnutls_session_t *session){
396
int ret;
397
/* GnuTLS session creation */
398
ret = gnutls_init(session, GNUTLS_SERVER);
399
if (ret != GNUTLS_E_SUCCESS){
341
400
fprintf(stderr, "Error in GnuTLS session initialization: %s\n",
342
401
safer_gnutls_strerror(ret));
343
402
}
344
403
345
if ((ret = gnutls_priority_set_direct(*session, mc->priority, &err))
346
!= GNUTLS_E_SUCCESS) {
347
fprintf(stderr, "Syntax error at: %s\n", err);
348
fprintf(stderr, "GnuTLS error: %s\n",
349
safer_gnutls_strerror(ret));
350
return -1;
404
{
405
const char *err;
406
ret = gnutls_priority_set_direct(*session, mc->priority, &err);
407
if (ret != GNUTLS_E_SUCCESS) {
408
fprintf(stderr, "Syntax error at: %s\n", err);
409
fprintf(stderr, "GnuTLS error: %s\n",
410
safer_gnutls_strerror(ret));
411
gnutls_deinit (*session);
412
return -1;
413
}
351
414
}
352
415
353
if ((ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,
354
mc->cred))
355
!= GNUTLS_E_SUCCESS) {
356
fprintf(stderr, "Error setting a credentials set: %s\n",
416
ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,
417
mc->cred);
418
if (ret != GNUTLS_E_SUCCESS) {
419
fprintf(stderr, "Error setting GnuTLS credentials: %s\n",
357
420
safer_gnutls_strerror(ret));
421
gnutls_deinit (*session);
358
422
return -1;
359
423
}
360
424
367
431
return 0;
368
432
}
369
433
434
/* Avahi log function callback */
370
435
static void empty_log(__attribute__((unused)) AvahiLogLevel level,
371
436
__attribute__((unused)) const char *txt){}
372
437
438
/* Called when a Mandos server is found */
373
439
static int start_mandos_communication(const char *ip, uint16_t port,
374
440
AvahiIfIndex if_index,
375
441
mandos_context *mc){
376
442
int ret, tcp_sd;
377
struct sockaddr_in6 to;
443
union { struct sockaddr in; struct sockaddr_in6 in6; } to;
378
444
char *buffer = NULL;
379
445
char *decrypted_buffer;
380
446
size_t buffer_length = 0;
381
447
size_t buffer_capacity = 0;
382
448
ssize_t decrypted_buffer_size;
383
size_t written = 0;
449
size_t written;
384
450
int retval = 0;
385
451
char interface[IF_NAMESIZE];
386
452
gnutls_session_t session;
387
gnutls_dh_params_t dh_params;
453
454
ret = init_gnutls_session (mc, &session);
455
if (ret != 0){
456
return -1;
457
}
388
458
389
459
if(debug){
390
fprintf(stderr, "Setting up a tcp connection to %s, port %d\n",
391
ip, port);
460
fprintf(stderr, "Setting up a tcp connection to %s, port %" PRIu16
461
"\n", ip, port);
392
462
}
393
463
394
464
tcp_sd = socket(PF_INET6, SOCK_STREAM, 0);
405
475
fprintf(stderr, "Binding to interface %s\n", interface);
406
476
}
407
477
408
memset(&to,0,sizeof(to)); /* Spurious warning */
409
to.sin6_family = AF_INET6;
410
ret = inet_pton(AF_INET6, ip, &to.sin6_addr);
478
memset(&to, 0, sizeof(to)); /* Spurious warning */
479
to.in6.sin6_family = AF_INET6;
480
/* It would be nice to have a way to detect if we were passed an
481
IPv4 address here. Now we assume an IPv6 address. */
482
ret = inet_pton(AF_INET6, ip, &to.in6.sin6_addr);
411
483
if (ret < 0 ){
412
484
perror("inet_pton");
413
485
return -1;
416
488
fprintf(stderr, "Bad address: %s\n", ip);
417
489
return -1;
418
490
}
419
to.sin6_port = htons(port); /* Spurious warning */
491
to.in6.sin6_port = htons(port); /* Spurious warning */
420
492
421
to.sin6_scope_id = (uint32_t)if_index;
493
to.in6.sin6_scope_id = (uint32_t)if_index;
422
494
423
495
if(debug){
424
fprintf(stderr, "Connection to: %s, port %d\n", ip, port);
496
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
497
port);
425
498
char addrstr[INET6_ADDRSTRLEN] = "";
426
if(inet_ntop(to.sin6_family, &(to.sin6_addr), addrstr,
499
if(inet_ntop(to.in6.sin6_family, &(to.in6.sin6_addr), addrstr,
427
500
sizeof(addrstr)) == NULL){
428
501
perror("inet_ntop");
429
502
} else {
433
506
}
434
507
}
435
508
436
ret = connect(tcp_sd, (struct sockaddr *) &to, sizeof(to));
509
ret = connect(tcp_sd, &to.in, sizeof(to));
437
510
if (ret < 0){
438
511
perror("connect");
439
512
return -1;
440
513
}
441
442
ret = initgnutls (mc, &session, &dh_params);
443
if (ret != 0){
444
retval = -1;
445
return -1;
514
515
const char *out = mandos_protocol_version;
516
written = 0;
517
while (true){
518
size_t out_size = strlen(out);
519
ret = TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
520
out_size - written));
521
if (ret == -1){
522
perror("write");
523
retval = -1;
524
goto mandos_end;
525
}
526
written += (size_t)ret;
527
if(written < out_size){
528
continue;
529
} else {
530
if (out == mandos_protocol_version){
531
written = 0;
532
out = "\r\n";
533
} else {
534
break;
535
}
536
}
537
}
538
539
if(debug){
540
fprintf(stderr, "Establishing TLS session with %s\n", ip);
446
541
}
447
542
448
543
gnutls_transport_set_ptr (session, (gnutls_transport_ptr_t) tcp_sd);
449
450
if(debug){
451
fprintf(stderr, "Establishing TLS session with %s\n", ip);
452
}
453
454
ret = gnutls_handshake (session);
544
545
do{
546
ret = gnutls_handshake (session);
547
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
455
548
456
549
if (ret != GNUTLS_E_SUCCESS){
457
550
if(debug){
458
fprintf(stderr, "\n*** Handshake failed ***\n");
551
fprintf(stderr, "*** GnuTLS Handshake failed ***\n");
459
552
gnutls_perror (ret);
460
553
}
461
554
retval = -1;
462
goto exit;
555
goto mandos_end;
463
556
}
464
557
465
//Retrieve OpenPGP packet that contains the wanted password
558
/* Read OpenPGP packet that contains the wanted password */
466
559
467
560
if(debug){
468
561
fprintf(stderr, "Retrieving pgp encrypted password from %s\n",
470
563
}
471
564
472
565
while(true){
473
if (buffer_length + BUFFER_SIZE > buffer_capacity){
474
buffer = realloc(buffer, buffer_capacity + BUFFER_SIZE);
475
if (buffer == NULL){
476
perror("realloc");
477
goto exit;
478
}
479
buffer_capacity += BUFFER_SIZE;
566
buffer_capacity = adjustbuffer(&buffer, buffer_length,
567
buffer_capacity);
568
if (buffer_capacity == 0){
569
perror("adjustbuffer");
570
retval = -1;
571
goto mandos_end;
480
572
}
481
573
482
574
ret = gnutls_record_recv(session, buffer+buffer_length,
490
582
case GNUTLS_E_AGAIN:
491
583
break;
492
584
case GNUTLS_E_REHANDSHAKE:
493
ret = gnutls_handshake (session);
585
do{
586
ret = gnutls_handshake (session);
587
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
494
588
if (ret < 0){
495
fprintf(stderr, "\n*** Handshake failed ***\n");
589
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
496
590
gnutls_perror (ret);
497
591
retval = -1;
498
goto exit;
592
goto mandos_end;
499
593
}
500
594
break;
501
595
default:
502
596
fprintf(stderr, "Unknown error while reading data from"
503
" encrypted session with mandos server\n");
597
" encrypted session with Mandos server\n");
504
598
retval = -1;
505
599
gnutls_bye (session, GNUTLS_SHUT_RDWR);
506
goto exit;
600
goto mandos_end;
507
601
}
508
602
} else {
509
603
buffer_length += (size_t) ret;
510
604
}
511
605
}
512
606
607
if(debug){
608
fprintf(stderr, "Closing TLS session\n");
609
}
610
611
gnutls_bye (session, GNUTLS_SHUT_RDWR);
612
513
613
if (buffer_length > 0){
514
614
decrypted_buffer_size = pgp_packet_decrypt(buffer,
515
615
buffer_length,
516
616
&decrypted_buffer,
517
617
keydir);
518
618
if (decrypted_buffer_size >= 0){
619
written = 0;
519
620
while(written < (size_t) decrypted_buffer_size){
520
621
ret = (int)fwrite (decrypted_buffer + written, 1,
521
622
(size_t)decrypted_buffer_size - written,
535
636
retval = -1;
536
637
}
537
638
}
538
539
//shutdown procedure
540
541
if(debug){
542
fprintf(stderr, "Closing TLS session\n");
543
}
544
639
640
/* Shutdown procedure */
641
642
mandos_end:
545
643
free(buffer);
546
gnutls_bye (session, GNUTLS_SHUT_RDWR);
547
exit:
548
644
close(tcp_sd);
549
645
gnutls_deinit (session);
550
gnutls_certificate_free_credentials (mc->cred);
551
gnutls_global_deinit ();
552
646
return retval;
553
647
}
554
648
575
669
switch (event) {
576
670
default:
577
671
case AVAHI_RESOLVER_FAILURE:
578
fprintf(stderr, "(Resolver) Failed to resolve service '%s' of"
579
" type '%s' in domain '%s': %s\n", name, type, domain,
672
fprintf(stderr, "(Avahi Resolver) Failed to resolve service '%s'"
673
" of type '%s' in domain '%s': %s\n", name, type, domain,
580
674
avahi_strerror(avahi_server_errno(mc->server)));
581
675
break;
582
676
585
679
char ip[AVAHI_ADDRESS_STR_MAX];
586
680
avahi_address_snprint(ip, sizeof(ip), address);
587
681
if(debug){
588
fprintf(stderr, "Mandos server \"%s\" found on %s (%s) on"
589
" port %d\n", name, host_name, ip, port);
682
fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %"
683
PRIu16 ") on port %d\n", name, host_name, ip,
684
interface, port);
590
685
}
591
686
int ret = start_mandos_communication(ip, port, interface, mc);
592
687
if (ret == 0){
593
exit(EXIT_SUCCESS);
688
avahi_simple_poll_quit(mc->simple_poll);
594
689
}
595
690
}
596
691
}
617
712
default:
618
713
case AVAHI_BROWSER_FAILURE:
619
714
620
fprintf(stderr, "(Browser) %s\n",
715
fprintf(stderr, "(Avahi browser) %s\n",
621
716
avahi_strerror(avahi_server_errno(mc->server)));
622
717
avahi_simple_poll_quit(mc->simple_poll);
623
718
return;
624
719
625
720
case AVAHI_BROWSER_NEW:
626
/* We ignore the returned resolver object. In the callback
627
function we free it. If the server is terminated before
628
the callback function is called the server will free
629
the resolver for us. */
721
/* We ignore the returned Avahi resolver object. In the callback
722
function we free it. If the Avahi server is terminated before
723
the callback function is called the Avahi server will free the
724
resolver for us. */
630
725
631
726
if (!(avahi_s_service_resolver_new(mc->server, interface,
632
727
protocol, name, type, domain,
633
728
AVAHI_PROTO_INET6, 0,
634
729
resolve_callback, mc)))
635
fprintf(stderr, "Failed to resolve service '%s': %s\n", name,
636
avahi_strerror(avahi_server_errno(mc->server)));
730
fprintf(stderr, "Avahi: Failed to resolve service '%s': %s\n",
731
name, avahi_strerror(avahi_server_errno(mc->server)));
637
732
break;
638
733
639
734
case AVAHI_BROWSER_REMOVE:
641
736
642
737
case AVAHI_BROWSER_ALL_FOR_NOW:
643
738
case AVAHI_BROWSER_CACHE_EXHAUSTED:
739
if(debug){
740
fprintf(stderr, "No Mandos server found, still searching...\n");
741
}
644
742
break;
645
743
}
646
744
}
647
745
648
746
/* Combines file name and path and returns the malloced new
649
747
string. some sane checks could/should be added */
650
static const char *combinepath(const char *first, const char *second){
651
size_t f_len = strlen(first);
652
size_t s_len = strlen(second);
653
char *tmp = malloc(f_len + s_len + 2);
654
if (tmp == NULL){
748
static char *combinepath(const char *first, const char *second){
749
char *tmp;
750
int ret = asprintf(&tmp, "%s/%s", first, second);
751
if(ret < 0){
655
752
return NULL;
656
753
}
657
if(f_len > 0){
658
memcpy(tmp, first, f_len); /* Spurious warning */
659
}
660
tmp[f_len] = '/';
661
if(s_len > 0){
662
memcpy(tmp + f_len + 1, second, s_len); /* Spurious warning */
663
}
664
tmp[f_len + 1 + s_len] = '\0';
665
754
return tmp;
666
755
}
667
756
668
757
669
int main(AVAHI_GCC_UNUSED int argc, AVAHI_GCC_UNUSED char*argv[]) {
670
AvahiServerConfig config;
758
int main(int argc, char *argv[]){
671
759
AvahiSServiceBrowser *sb = NULL;
672
760
int error;
673
761
int ret;
674
int debug_int;
675
int returncode = EXIT_SUCCESS;
762
int exitcode = EXIT_SUCCESS;
676
763
const char *interface = "eth0";
677
764
struct ifreq network;
678
765
int sd;
766
uid_t uid;
767
gid_t gid;
679
768
char *connect_to = NULL;
680
769
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
770
char *pubkeyfilename = NULL;
771
char *seckeyfilename = NULL;
772
const char *pubkeyname = "pubkey.txt";
773
const char *seckeyname = "seckey.txt";
681
774
mandos_context mc = { .simple_poll = NULL, .server = NULL,
682
775
.dh_bits = 1024, .priority = "SECURE256"};
683
684
debug_int = debug ? 1 : 0;
685
while (true){
686
struct option long_options[] = {
687
{"debug", no_argument, &debug_int, 1},
688
{"connect", required_argument, NULL, 'c'},
689
{"interface", required_argument, NULL, 'i'},
690
{"keydir", required_argument, NULL, 'd'},
691
{"seckey", required_argument, NULL, 's'},
692
{"pubkey", required_argument, NULL, 'p'},
693
{"dh-bits", required_argument, NULL, 'D'},
694
{"priority", required_argument, NULL, 'P'},
695
{0, 0, 0, 0} };
696
697
int option_index = 0;
698
ret = getopt_long (argc, argv, "i:", long_options,
699
&option_index);
700
701
if (ret == -1){
702
break;
703
}
704
705
switch(ret){
706
case 0:
707
break;
708
case 'i':
709
interface = optarg;
710
break;
711
case 'c':
712
connect_to = optarg;
713
break;
714
case 'd':
715
keydir = optarg;
716
break;
717
case 'p':
718
pubkeyfile = optarg;
719
break;
720
case 's':
721
seckeyfile = optarg;
722
break;
723
case 'D':
724
errno = 0;
725
mc.dh_bits = (unsigned int) strtol(optarg, NULL, 10);
726
if (errno){
727
perror("strtol");
728
exit(EXIT_FAILURE);
729
}
730
break;
731
case 'P':
732
mc.priority = optarg;
733
break;
734
case '?':
735
default:
736
exit(EXIT_FAILURE);
737
}
738
}
739
debug = debug_int ? true : false;
740
741
pubkeyfile = combinepath(keydir, pubkeyfile);
742
if (pubkeyfile == NULL){
743
perror("combinepath");
744
returncode = EXIT_FAILURE;
745
goto exit;
746
}
747
748
seckeyfile = combinepath(keydir, seckeyfile);
749
if (seckeyfile == NULL){
750
perror("combinepath");
751
goto exit;
776
bool gnutls_initalized = false;
777
778
{
779
struct argp_option options[] = {
780
{ .name = "debug", .key = 128,
781
.doc = "Debug mode", .group = 3 },
782
{ .name = "connect", .key = 'c',
783
.arg = "IP",
784
.doc = "Connect directly to a sepcified mandos server",
785
.group = 1 },
786
{ .name = "interface", .key = 'i',
787
.arg = "INTERFACE",
788
.doc = "Interface that Avahi will conntect through",
789
.group = 1 },
790
{ .name = "keydir", .key = 'd',
791
.arg = "KEYDIR",
792
.doc = "Directory where the openpgp keyring is",
793
.group = 1 },
794
{ .name = "seckey", .key = 's',
795
.arg = "SECKEY",
796
.doc = "Secret openpgp key for gnutls authentication",
797
.group = 1 },
798
{ .name = "pubkey", .key = 'p',
799
.arg = "PUBKEY",
800
.doc = "Public openpgp key for gnutls authentication",
801
.group = 2 },
802
{ .name = "dh-bits", .key = 129,
803
.arg = "BITS",
804
.doc = "dh-bits to use in gnutls communication",
805
.group = 2 },
806
{ .name = "priority", .key = 130,
807
.arg = "PRIORITY",
808
.doc = "GNUTLS priority", .group = 1 },
809
{ .name = NULL }
810
};
811
812
813
error_t parse_opt (int key, char *arg,
814
struct argp_state *state) {
815
/* Get the INPUT argument from `argp_parse', which we know is
816
a pointer to our plugin list pointer. */
817
switch (key) {
818
case 128:
819
debug = true;
820
break;
821
case 'c':
822
connect_to = arg;
823
break;
824
case 'i':
825
interface = arg;
826
break;
827
case 'd':
828
keydir = arg;
829
break;
830
case 's':
831
seckeyname = arg;
832
break;
833
case 'p':
834
pubkeyname = arg;
835
break;
836
case 129:
837
errno = 0;
838
mc.dh_bits = (unsigned int) strtol(arg, NULL, 10);
839
if (errno){
840
perror("strtol");
841
exit(EXIT_FAILURE);
842
}
843
break;
844
case 130:
845
mc.priority = arg;
846
break;
847
case ARGP_KEY_ARG:
848
argp_usage (state);
849
case ARGP_KEY_END:
850
break;
851
default:
852
return ARGP_ERR_UNKNOWN;
853
}
854
return 0;
855
}
856
857
struct argp argp = { .options = options, .parser = parse_opt,
858
.args_doc = "",
859
.doc = "Mandos client -- Get and decrypt"
860
" passwords from mandos server" };
861
ret = argp_parse (&argp, argc, argv, 0, 0, NULL);
862
if (ret == ARGP_ERR_UNKNOWN){
863
fprintf(stderr, "Unknown error while parsing arguments\n");
864
exitcode = EXIT_FAILURE;
865
goto end;
866
}
867
}
868
869
pubkeyfilename = combinepath(keydir, pubkeyname);
870
if (pubkeyfilename == NULL){
871
perror("combinepath");
872
exitcode = EXIT_FAILURE;
873
goto end;
874
}
875
876
seckeyfilename = combinepath(keydir, seckeyname);
877
if (seckeyfilename == NULL){
878
perror("combinepath");
879
exitcode = EXIT_FAILURE;
880
goto end;
881
}
882
883
ret = init_gnutls_global(&mc, pubkeyfilename, seckeyfilename);
884
if (ret == -1){
885
fprintf(stderr, "init_gnutls_global failed\n");
886
exitcode = EXIT_FAILURE;
887
goto end;
888
} else {
889
gnutls_initalized = true;
890
}
891
892
/* If the interface is down, bring it up */
893
{
894
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
895
if(sd < 0) {
896
perror("socket");
897
exitcode = EXIT_FAILURE;
898
goto end;
899
}
900
strcpy(network.ifr_name, interface); /* Spurious warning */
901
ret = ioctl(sd, SIOCGIFFLAGS, &network);
902
if(ret == -1){
903
perror("ioctl SIOCGIFFLAGS");
904
exitcode = EXIT_FAILURE;
905
goto end;
906
}
907
if((network.ifr_flags & IFF_UP) == 0){
908
network.ifr_flags |= IFF_UP;
909
ret = ioctl(sd, SIOCSIFFLAGS, &network);
910
if(ret == -1){
911
perror("ioctl SIOCSIFFLAGS");
912
exitcode = EXIT_FAILURE;
913
goto end;
914
}
915
}
916
close(sd);
917
}
918
919
uid = getuid();
920
gid = getgid();
921
922
ret = setuid(uid);
923
if (ret == -1){
924
perror("setuid");
925
}
926
927
setgid(gid);
928
if (ret == -1){
929
perror("setgid");
752
930
}
753
931
754
932
if_index = (AvahiIfIndex) if_nametoindex(interface);
763
941
char *address = strrchr(connect_to, ':');
764
942
if(address == NULL){
765
943
fprintf(stderr, "No colon in address\n");
766
exit(EXIT_FAILURE);
944
exitcode = EXIT_FAILURE;
945
goto end;
767
946
}
768
947
errno = 0;
769
948
uint16_t port = (uint16_t) strtol(address+1, NULL, 10);
770
949
if(errno){
771
950
perror("Bad port number");
772
exit(EXIT_FAILURE);
951
exitcode = EXIT_FAILURE;
952
goto end;
773
953
}
774
954
*address = '\0';
775
955
address = connect_to;
776
956
ret = start_mandos_communication(address, port, if_index, &mc);
777
957
if(ret < 0){
778
exit(EXIT_FAILURE);
958
exitcode = EXIT_FAILURE;
779
959
} else {
780
exit(EXIT_SUCCESS);
781
}
782
}
783
784
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
785
if(sd < 0) {
786
perror("socket");
787
returncode = EXIT_FAILURE;
788
goto exit;
789
}
790
strcpy(network.ifr_name, interface); /* Spurious warning */
791
ret = ioctl(sd, SIOCGIFFLAGS, &network);
792
if(ret == -1){
793
794
perror("ioctl SIOCGIFFLAGS");
795
returncode = EXIT_FAILURE;
796
goto exit;
797
}
798
if((network.ifr_flags & IFF_UP) == 0){
799
network.ifr_flags |= IFF_UP;
800
ret = ioctl(sd, SIOCSIFFLAGS, &network);
801
if(ret == -1){
802
perror("ioctl SIOCSIFFLAGS");
803
returncode = EXIT_FAILURE;
804
goto exit;
805
}
806
}
807
close(sd);
960
exitcode = EXIT_SUCCESS;
961
}
962
goto end;
963
}
808
964
809
965
if (not debug){
810
966
avahi_set_log_function(empty_log);
811
967
}
812
968
813
/* Initialize the psuedo-RNG */
969
/* Initialize the pseudo-RNG for Avahi */
814
970
srand((unsigned int) time(NULL));
815
816
/* Allocate main loop object */
817
if (!(mc.simple_poll = avahi_simple_poll_new())) {
818
fprintf(stderr, "Failed to create simple poll object.\n");
819
returncode = EXIT_FAILURE;
820
goto exit;
821
}
822
823
/* Do not publish any local records */
824
avahi_server_config_init(&config);
825
config.publish_hinfo = 0;
826
config.publish_addresses = 0;
827
config.publish_workstation = 0;
828
config.publish_domain = 0;
829
830
/* Allocate a new server */
831
mc.server=avahi_server_new(avahi_simple_poll_get(mc.simple_poll),
832
&config, NULL, NULL, &error);
833
834
/* Free the configuration data */
835
avahi_server_config_free(&config);
836
837
/* Check if creating the server object succeeded */
838
if (!mc.server) {
839
fprintf(stderr, "Failed to create server: %s\n",
971
972
/* Allocate main Avahi loop object */
973
mc.simple_poll = avahi_simple_poll_new();
974
if (mc.simple_poll == NULL) {
975
fprintf(stderr, "Avahi: Failed to create simple poll"
976
" object.\n");
977
exitcode = EXIT_FAILURE;
978
goto end;
979
}
980
981
{
982
AvahiServerConfig config;
983
/* Do not publish any local Zeroconf records */
984
avahi_server_config_init(&config);
985
config.publish_hinfo = 0;
986
config.publish_addresses = 0;
987
config.publish_workstation = 0;
988
config.publish_domain = 0;
989
990
/* Allocate a new server */
991
mc.server = avahi_server_new(avahi_simple_poll_get
992
(mc.simple_poll), &config, NULL,
993
NULL, &error);
994
995
/* Free the Avahi configuration data */
996
avahi_server_config_free(&config);
997
}
998
999
/* Check if creating the Avahi server object succeeded */
1000
if (mc.server == NULL) {
1001
fprintf(stderr, "Failed to create Avahi server: %s\n",
840
1002
avahi_strerror(error));
841
returncode = EXIT_FAILURE;
842
goto exit;
1003
exitcode = EXIT_FAILURE;
1004
goto end;
843
1005
}
844
1006
845
/* Create the service browser */
1007
/* Create the Avahi service browser */
846
1008
sb = avahi_s_service_browser_new(mc.server, if_index,
847
1009
AVAHI_PROTO_INET6,
848
1010
"_mandos._tcp", NULL, 0,
849
1011
browse_callback, &mc);
850
if (!sb) {
1012
if (sb == NULL) {
851
1013
fprintf(stderr, "Failed to create service browser: %s\n",
852
1014
avahi_strerror(avahi_server_errno(mc.server)));
853
returncode = EXIT_FAILURE;
854
goto exit;
1015
exitcode = EXIT_FAILURE;
1016
goto end;
855
1017
}
856
1018
857
1019
/* Run the main loop */
858
1020
859
1021
if (debug){
860
fprintf(stderr, "Starting avahi loop search\n");
1022
fprintf(stderr, "Starting Avahi loop search\n");
861
1023
}
862
1024
863
1025
avahi_simple_poll_loop(mc.simple_poll);
864
1026
865
exit:
1027
end:
866
1028
867
1029
if (debug){
868
1030
fprintf(stderr, "%s exiting\n", argv[0]);
869
1031
}
870
1032
871
1033
/* Cleanup things */
872
if (sb)
1034
if (sb != NULL)
873
1035
avahi_s_service_browser_free(sb);
874
1036
875
if (mc.server)
1037
if (mc.server != NULL)
876
1038
avahi_server_free(mc.server);
877
1039
878
if (mc.simple_poll)
1040
if (mc.simple_poll != NULL)
879
1041
avahi_simple_poll_free(mc.simple_poll);
880
free(pubkeyfile);
881
free(seckeyfile);
1042
free(pubkeyfilename);
1043
free(seckeyfilename);
1044
1045
if (gnutls_initalized){
1046
gnutls_certificate_free_credentials(mc.cred);
1047
gnutls_global_deinit ();
1048
}
882
1049
883
return returncode;
1050
return exitcode;
884
1051
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0