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- Committer: Teddy Hogeborn
- Date: 2008-09-02 15:02:37 UTC
- Revision ID: teddy@fukt.bsnet.se-20080902150237-ug2fpsu5s2yvmdl7
* Makefile (run-client): Add "--config-file=plugin-runner.conf".
- files added:
- .bzrignore
- 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
170
214
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
171
215
gpgme_strsource(rc), gpgme_strerror(rc));
172
216
plaintext_length = -1;
217
if (debug){
218
gpgme_decrypt_result_t result;
219
result = gpgme_op_decrypt_result(ctx);
220
if (result == NULL){
221
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
222
} else {
223
fprintf(stderr, "Unsupported algorithm: %s\n",
224
result->unsupported_algorithm);
225
fprintf(stderr, "Wrong key usage: %u\n",
226
result->wrong_key_usage);
227
if(result->file_name != NULL){
228
fprintf(stderr, "File name: %s\n", result->file_name);
229
}
230
gpgme_recipient_t recipient;
231
recipient = result->recipients;
232
if(recipient){
233
while(recipient != NULL){
234
fprintf(stderr, "Public key algorithm: %s\n",
235
gpgme_pubkey_algo_name(recipient->pubkey_algo));
236
fprintf(stderr, "Key ID: %s\n", recipient->keyid);
237
fprintf(stderr, "Secret key available: %s\n",
238
recipient->status == GPG_ERR_NO_SECKEY
239
? "No" : "Yes");
240
recipient = recipient->next;
241
}
242
}
243
}
244
}
173
245
goto decrypt_end;
174
246
}
175
247
177
249
fprintf(stderr, "Decryption of OpenPGP data succeeded\n");
178
250
}
179
251
180
if (debug){
181
gpgme_decrypt_result_t result;
182
result = gpgme_op_decrypt_result(ctx);
183
if (result == NULL){
184
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
185
} else {
186
fprintf(stderr, "Unsupported algorithm: %s\n",
187
result->unsupported_algorithm);
188
fprintf(stderr, "Wrong key usage: %d\n",
189
result->wrong_key_usage);
190
if(result->file_name != NULL){
191
fprintf(stderr, "File name: %s\n", result->file_name);
192
}
193
gpgme_recipient_t recipient;
194
recipient = result->recipients;
195
if(recipient){
196
while(recipient != NULL){
197
fprintf(stderr, "Public key algorithm: %s\n",
198
gpgme_pubkey_algo_name(recipient->pubkey_algo));
199
fprintf(stderr, "Key ID: %s\n", recipient->keyid);
200
fprintf(stderr, "Secret key available: %s\n",
201
recipient->status == GPG_ERR_NO_SECKEY
202
? "No" : "Yes");
203
recipient = recipient->next;
204
}
205
}
206
}
207
}
208
209
252
/* Seek back to the beginning of the GPGME plaintext data buffer */
210
253
if (gpgme_data_seek(dh_plain, (off_t) 0, SEEK_SET) == -1){
211
254
perror("pgpme_data_seek");
215
258
216
259
*plaintext = NULL;
217
260
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");
261
plaintext_capacity = adjustbuffer(plaintext,
262
(size_t)plaintext_length,
263
plaintext_capacity);
264
if (plaintext_capacity == 0){
265
perror("adjustbuffer");
224
266
plaintext_length = -1;
225
267
goto decrypt_end;
226
}
227
plaintext_capacity += BUFFER_SIZE;
228
268
}
229
269
230
270
ret = gpgme_data_read(dh_plain, *plaintext + plaintext_length,
244
284
245
285
if(debug){
246
286
fprintf(stderr, "Decrypted password is: ");
247
for(size_t i = 0; i < plaintext_length; i++){
287
for(ssize_t i = 0; i < plaintext_length; i++){
248
288
fprintf(stderr, "%02hhX ", (*plaintext)[i]);
249
289
}
250
290
fprintf(stderr, "\n");
261
301
}
262
302
263
303
static const char * safer_gnutls_strerror (int value) {
264
const char *ret = gnutls_strerror (value);
304
const char *ret = gnutls_strerror (value); /* Spurious warning */
265
305
if (ret == NULL)
266
306
ret = "(unknown)";
267
307
return ret;
268
308
}
269
309
310
/* GnuTLS log function callback */
270
311
static void debuggnutls(__attribute__((unused)) int level,
271
312
const char* string){
272
fprintf(stderr, "%s", string);
313
fprintf(stderr, "GnuTLS: %s", string);
273
314
}
274
315
275
static int initgnutls(mandos_context *mc, gnutls_session_t *session,
276
gnutls_dh_params_t *dh_params){
277
const char *err;
316
static int init_gnutls_global(mandos_context *mc,
317
const char *pubkeyfilename,
318
const char *seckeyfilename){
278
319
int ret;
279
320
280
321
if(debug){
281
322
fprintf(stderr, "Initializing GnuTLS\n");
282
323
}
283
284
if ((ret = gnutls_global_init ())
285
!= GNUTLS_E_SUCCESS) {
286
fprintf (stderr, "global_init: %s\n", safer_gnutls_strerror(ret));
324
325
ret = gnutls_global_init();
326
if (ret != GNUTLS_E_SUCCESS) {
327
fprintf (stderr, "GnuTLS global_init: %s\n",
328
safer_gnutls_strerror(ret));
287
329
return -1;
288
330
}
289
331
290
332
if (debug){
333
/* "Use a log level over 10 to enable all debugging options."
334
* - GnuTLS manual
335
*/
291
336
gnutls_global_set_log_level(11);
292
337
gnutls_global_set_log_function(debuggnutls);
293
338
}
294
339
295
/* openpgp credentials */
296
if ((ret = gnutls_certificate_allocate_credentials (&mc->cred))
297
!= GNUTLS_E_SUCCESS) {
298
fprintf (stderr, "memory error: %s\n",
340
/* OpenPGP credentials */
341
gnutls_certificate_allocate_credentials(&mc->cred);
342
if (ret != GNUTLS_E_SUCCESS){
343
fprintf (stderr, "GnuTLS memory error: %s\n", /* Spurious
344
warning */
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));
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,
534
635
} else {
535
636
retval = -1;
536
637
}
537
}
538
539
//shutdown procedure
540
541
if(debug){
542
fprintf(stderr, "Closing TLS session\n");
543
}
544
638
} else {
639
retval = -1;
640
}
641
642
/* Shutdown procedure */
643
644
mandos_end:
545
645
free(buffer);
546
gnutls_bye (session, GNUTLS_SHUT_RDWR);
547
exit:
548
646
close(tcp_sd);
549
647
gnutls_deinit (session);
550
gnutls_certificate_free_credentials (mc->cred);
551
gnutls_global_deinit ();
552
648
return retval;
553
649
}
554
650
567
663
flags,
568
664
void* userdata) {
569
665
mandos_context *mc = userdata;
570
assert(r); /* Spurious warning */
666
assert(r);
571
667
572
668
/* Called whenever a service has been resolved successfully or
573
669
timed out */
575
671
switch (event) {
576
672
default:
577
673
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,
674
fprintf(stderr, "(Avahi Resolver) Failed to resolve service '%s'"
675
" of type '%s' in domain '%s': %s\n", name, type, domain,
580
676
avahi_strerror(avahi_server_errno(mc->server)));
581
677
break;
582
678
585
681
char ip[AVAHI_ADDRESS_STR_MAX];
586
682
avahi_address_snprint(ip, sizeof(ip), address);
587
683
if(debug){
588
fprintf(stderr, "Mandos server \"%s\" found on %s (%s) on"
589
" port %d\n", name, host_name, ip, port);
684
fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %"
685
PRIu16 ") on port %d\n", name, host_name, ip,
686
interface, port);
590
687
}
591
688
int ret = start_mandos_communication(ip, port, interface, mc);
592
689
if (ret == 0){
593
exit(EXIT_SUCCESS);
690
avahi_simple_poll_quit(mc->simple_poll);
594
691
}
595
692
}
596
693
}
608
705
flags,
609
706
void* userdata) {
610
707
mandos_context *mc = userdata;
611
assert(b); /* Spurious warning */
708
assert(b);
612
709
613
710
/* Called whenever a new services becomes available on the LAN or
614
711
is removed from the LAN */
617
714
default:
618
715
case AVAHI_BROWSER_FAILURE:
619
716
620
fprintf(stderr, "(Browser) %s\n",
717
fprintf(stderr, "(Avahi browser) %s\n",
621
718
avahi_strerror(avahi_server_errno(mc->server)));
622
719
avahi_simple_poll_quit(mc->simple_poll);
623
720
return;
624
721
625
722
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. */
723
/* We ignore the returned Avahi resolver object. In the callback
724
function we free it. If the Avahi server is terminated before
725
the callback function is called the Avahi server will free the
726
resolver for us. */
630
727
631
728
if (!(avahi_s_service_resolver_new(mc->server, interface,
632
729
protocol, name, type, domain,
633
730
AVAHI_PROTO_INET6, 0,
634
731
resolve_callback, mc)))
635
fprintf(stderr, "Failed to resolve service '%s': %s\n", name,
636
avahi_strerror(avahi_server_errno(mc->server)));
732
fprintf(stderr, "Avahi: Failed to resolve service '%s': %s\n",
733
name, avahi_strerror(avahi_server_errno(mc->server)));
637
734
break;
638
735
639
736
case AVAHI_BROWSER_REMOVE:
641
738
642
739
case AVAHI_BROWSER_ALL_FOR_NOW:
643
740
case AVAHI_BROWSER_CACHE_EXHAUSTED:
741
if(debug){
742
fprintf(stderr, "No Mandos server found, still searching...\n");
743
}
644
744
break;
645
745
}
646
746
}
647
747
648
748
/* Combines file name and path and returns the malloced new
649
749
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){
750
static char *combinepath(const char *first, const char *second){
751
char *tmp;
752
int ret = asprintf(&tmp, "%s/%s", first, second);
753
if(ret < 0){
655
754
return NULL;
656
755
}
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
756
return tmp;
666
757
}
667
758
668
759
669
int main(AVAHI_GCC_UNUSED int argc, AVAHI_GCC_UNUSED char*argv[]) {
670
AvahiServerConfig config;
760
int main(int argc, char *argv[]){
671
761
AvahiSServiceBrowser *sb = NULL;
672
762
int error;
673
763
int ret;
674
int debug_int;
675
int returncode = EXIT_SUCCESS;
764
int exitcode = EXIT_SUCCESS;
676
765
const char *interface = "eth0";
677
766
struct ifreq network;
678
767
int sd;
768
uid_t uid;
769
gid_t gid;
679
770
char *connect_to = NULL;
680
771
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
772
char *pubkeyfilename = NULL;
773
char *seckeyfilename = NULL;
774
const char *pubkeyname = "pubkey.txt";
775
const char *seckeyname = "seckey.txt";
681
776
mandos_context mc = { .simple_poll = NULL, .server = NULL,
682
777
.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;
778
bool gnutls_initalized = false;
779
780
{
781
struct argp_option options[] = {
782
{ .name = "debug", .key = 128,
783
.doc = "Debug mode", .group = 3 },
784
{ .name = "connect", .key = 'c',
785
.arg = "IP",
786
.doc = "Connect directly to a sepcified mandos server",
787
.group = 1 },
788
{ .name = "interface", .key = 'i',
789
.arg = "INTERFACE",
790
.doc = "Interface that Avahi will conntect through",
791
.group = 1 },
792
{ .name = "keydir", .key = 'd',
793
.arg = "KEYDIR",
794
.doc = "Directory where the openpgp keyring is",
795
.group = 1 },
796
{ .name = "seckey", .key = 's',
797
.arg = "SECKEY",
798
.doc = "Secret openpgp key for gnutls authentication",
799
.group = 1 },
800
{ .name = "pubkey", .key = 'p',
801
.arg = "PUBKEY",
802
.doc = "Public openpgp key for gnutls authentication",
803
.group = 2 },
804
{ .name = "dh-bits", .key = 129,
805
.arg = "BITS",
806
.doc = "dh-bits to use in gnutls communication",
807
.group = 2 },
808
{ .name = "priority", .key = 130,
809
.arg = "PRIORITY",
810
.doc = "GNUTLS priority", .group = 1 },
811
{ .name = NULL }
812
};
813
814
815
error_t parse_opt (int key, char *arg,
816
struct argp_state *state) {
817
/* Get the INPUT argument from `argp_parse', which we know is
818
a pointer to our plugin list pointer. */
819
switch (key) {
820
case 128:
821
debug = true;
822
break;
823
case 'c':
824
connect_to = arg;
825
break;
826
case 'i':
827
interface = arg;
828
break;
829
case 'd':
830
keydir = arg;
831
break;
832
case 's':
833
seckeyname = arg;
834
break;
835
case 'p':
836
pubkeyname = arg;
837
break;
838
case 129:
839
errno = 0;
840
mc.dh_bits = (unsigned int) strtol(arg, NULL, 10);
841
if (errno){
842
perror("strtol");
843
exit(EXIT_FAILURE);
844
}
845
break;
846
case 130:
847
mc.priority = arg;
848
break;
849
case ARGP_KEY_ARG:
850
argp_usage (state);
851
case ARGP_KEY_END:
852
break;
853
default:
854
return ARGP_ERR_UNKNOWN;
855
}
856
return 0;
857
}
858
859
struct argp argp = { .options = options, .parser = parse_opt,
860
.args_doc = "",
861
.doc = "Mandos client -- Get and decrypt"
862
" passwords from mandos server" };
863
ret = argp_parse (&argp, argc, argv, 0, 0, NULL);
864
if (ret == ARGP_ERR_UNKNOWN){
865
fprintf(stderr, "Unknown error while parsing arguments\n");
866
exitcode = EXIT_FAILURE;
867
goto end;
868
}
869
}
870
871
pubkeyfilename = combinepath(keydir, pubkeyname);
872
if (pubkeyfilename == NULL){
873
perror("combinepath");
874
exitcode = EXIT_FAILURE;
875
goto end;
876
}
877
878
seckeyfilename = combinepath(keydir, seckeyname);
879
if (seckeyfilename == NULL){
880
perror("combinepath");
881
exitcode = EXIT_FAILURE;
882
goto end;
883
}
884
885
ret = init_gnutls_global(&mc, pubkeyfilename, seckeyfilename);
886
if (ret == -1){
887
fprintf(stderr, "init_gnutls_global failed\n");
888
exitcode = EXIT_FAILURE;
889
goto end;
890
} else {
891
gnutls_initalized = true;
892
}
893
894
/* If the interface is down, bring it up */
895
{
896
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
897
if(sd < 0) {
898
perror("socket");
899
exitcode = EXIT_FAILURE;
900
goto end;
901
}
902
strcpy(network.ifr_name, interface);
903
ret = ioctl(sd, SIOCGIFFLAGS, &network);
904
if(ret == -1){
905
perror("ioctl SIOCGIFFLAGS");
906
exitcode = EXIT_FAILURE;
907
goto end;
908
}
909
if((network.ifr_flags & IFF_UP) == 0){
910
network.ifr_flags |= IFF_UP;
911
ret = ioctl(sd, SIOCSIFFLAGS, &network);
912
if(ret == -1){
913
perror("ioctl SIOCSIFFLAGS");
914
exitcode = EXIT_FAILURE;
915
goto end;
916
}
917
}
918
close(sd);
919
}
920
921
uid = getuid();
922
gid = getgid();
923
924
ret = setuid(uid);
925
if (ret == -1){
926
perror("setuid");
927
}
928
929
setgid(gid);
930
if (ret == -1){
931
perror("setgid");
752
932
}
753
933
754
934
if_index = (AvahiIfIndex) if_nametoindex(interface);
763
943
char *address = strrchr(connect_to, ':');
764
944
if(address == NULL){
765
945
fprintf(stderr, "No colon in address\n");
766
exit(EXIT_FAILURE);
946
exitcode = EXIT_FAILURE;
947
goto end;
767
948
}
768
949
errno = 0;
769
950
uint16_t port = (uint16_t) strtol(address+1, NULL, 10);
770
951
if(errno){
771
952
perror("Bad port number");
772
exit(EXIT_FAILURE);
953
exitcode = EXIT_FAILURE;
954
goto end;
773
955
}
774
956
*address = '\0';
775
957
address = connect_to;
776
958
ret = start_mandos_communication(address, port, if_index, &mc);
777
959
if(ret < 0){
778
exit(EXIT_FAILURE);
960
exitcode = EXIT_FAILURE;
779
961
} 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);
962
exitcode = EXIT_SUCCESS;
963
}
964
goto end;
965
}
808
966
809
967
if (not debug){
810
968
avahi_set_log_function(empty_log);
811
969
}
812
970
813
/* Initialize the psuedo-RNG */
971
/* Initialize the pseudo-RNG for Avahi */
814
972
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",
973
974
/* Allocate main Avahi loop object */
975
mc.simple_poll = avahi_simple_poll_new();
976
if (mc.simple_poll == NULL) {
977
fprintf(stderr, "Avahi: Failed to create simple poll"
978
" object.\n");
979
exitcode = EXIT_FAILURE;
980
goto end;
981
}
982
983
{
984
AvahiServerConfig config;
985
/* Do not publish any local Zeroconf records */
986
avahi_server_config_init(&config);
987
config.publish_hinfo = 0;
988
config.publish_addresses = 0;
989
config.publish_workstation = 0;
990
config.publish_domain = 0;
991
992
/* Allocate a new server */
993
mc.server = avahi_server_new(avahi_simple_poll_get
994
(mc.simple_poll), &config, NULL,
995
NULL, &error);
996
997
/* Free the Avahi configuration data */
998
avahi_server_config_free(&config);
999
}
1000
1001
/* Check if creating the Avahi server object succeeded */
1002
if (mc.server == NULL) {
1003
fprintf(stderr, "Failed to create Avahi server: %s\n",
840
1004
avahi_strerror(error));
841
returncode = EXIT_FAILURE;
842
goto exit;
1005
exitcode = EXIT_FAILURE;
1006
goto end;
843
1007
}
844
1008
845
/* Create the service browser */
1009
/* Create the Avahi service browser */
846
1010
sb = avahi_s_service_browser_new(mc.server, if_index,
847
1011
AVAHI_PROTO_INET6,
848
1012
"_mandos._tcp", NULL, 0,
849
1013
browse_callback, &mc);
850
if (!sb) {
1014
if (sb == NULL) {
851
1015
fprintf(stderr, "Failed to create service browser: %s\n",
852
1016
avahi_strerror(avahi_server_errno(mc.server)));
853
returncode = EXIT_FAILURE;
854
goto exit;
1017
exitcode = EXIT_FAILURE;
1018
goto end;
855
1019
}
856
1020
857
1021
/* Run the main loop */
858
1022
859
1023
if (debug){
860
fprintf(stderr, "Starting avahi loop search\n");
1024
fprintf(stderr, "Starting Avahi loop search\n");
861
1025
}
862
1026
863
1027
avahi_simple_poll_loop(mc.simple_poll);
864
1028
865
exit:
1029
end:
866
1030
867
1031
if (debug){
868
1032
fprintf(stderr, "%s exiting\n", argv[0]);
869
1033
}
870
1034
871
1035
/* Cleanup things */
872
if (sb)
1036
if (sb != NULL)
873
1037
avahi_s_service_browser_free(sb);
874
1038
875
if (mc.server)
1039
if (mc.server != NULL)
876
1040
avahi_server_free(mc.server);
877
1041
878
if (mc.simple_poll)
1042
if (mc.simple_poll != NULL)
879
1043
avahi_simple_poll_free(mc.simple_poll);
880
free(pubkeyfile);
881
free(seckeyfile);
1044
free(pubkeyfilename);
1045
free(seckeyfilename);
1046
1047
if (gnutls_initalized){
1048
gnutls_certificate_free_credentials(mc.cred);
1049
gnutls_global_deinit ();
1050
}
882
1051
883
return returncode;
1052
return exitcode;
884
1053
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0