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- Committer: Teddy Hogeborn
- Date: 2008-08-04 21:25:55 UTC
- Revision ID: teddy@fukt.bsnet.se-20080804212555-rm7xxjze65f8avy3
* server.py: Cosmetic changes.
added
removed
plugins.d/mandosclient.c
32
32
#define _LARGEFILE_SOURCE
33
33
#define _FILE_OFFSET_BITS 64
34
34
35
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY() */
36
35
37
#include <stdio.h>
36
38
#include <assert.h>
37
39
#include <stdlib.h>
38
40
#include <time.h>
39
41
#include <net/if.h> /* if_nametoindex */
40
#include <sys/ioctl.h> // ioctl, ifreq, SIOCGIFFLAGS, IFF_UP, SIOCSIFFLAGS
41
#include <net/if.h> // ioctl, ifreq, SIOCGIFFLAGS, IFF_UP, SIOCSIFFLAGS
42
#include <sys/ioctl.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
43
SIOCSIFFLAGS */
44
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
45
SIOCSIFFLAGS */
42
46
43
47
#include <avahi-core/core.h>
44
48
#include <avahi-core/lookup.h>
47
51
#include <avahi-common/malloc.h>
48
52
#include <avahi-common/error.h>
49
53
50
//mandos client part
54
/* Mandos client part */
51
55
#include <sys/types.h> /* socket(), inet_pton() */
52
56
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
53
57
struct in6_addr, inet_pton() */
60
64
#include <string.h> /* memset */
61
65
#include <arpa/inet.h> /* inet_pton() */
62
66
#include <iso646.h> /* not */
63
64
// gpgme
67
#include <net/if.h> /* IF_NAMESIZE */
68
#include <argp.h> /* struct argp_option,
69
struct argp_state, struct argp,
70
argp_parse() */
71
/* GPGME */
65
72
#include <errno.h> /* perror() */
66
73
#include <gpgme.h>
67
74
68
// getopt_long
69
#include <getopt.h>
70
71
75
#define BUFFER_SIZE 256
72
76
77
bool debug = false;
73
78
static const char *keydir = "/conf/conf.d/mandos";
74
static const char *pubkeyfile = "pubkey.txt";
75
static const char *seckeyfile = "seckey.txt";
76
77
bool debug = false;
78
79
/* Used for passing in values through all the callback functions */
79
static const char mandos_protocol_version[] = "1";
80
const char *argp_program_version = "mandosclient 0.9";
81
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
82
83
/* Used for passing in values through the Avahi callback functions */
80
84
typedef struct {
81
85
AvahiSimplePoll *simple_poll;
82
86
AvahiServer *server;
83
87
gnutls_certificate_credentials_t cred;
84
88
unsigned int dh_bits;
89
gnutls_dh_params_t dh_params;
85
90
const char *priority;
86
91
} mandos_context;
87
92
88
static ssize_t pgp_packet_decrypt (char *packet, size_t packet_size,
89
char **new_packet,
93
/*
94
* Make room in "buffer" for at least BUFFER_SIZE additional bytes.
95
* "buffer_capacity" is how much is currently allocated,
96
* "buffer_length" is how much is already used.
97
*/
98
size_t adjustbuffer(char **buffer, size_t buffer_length,
99
size_t buffer_capacity){
100
if (buffer_length + BUFFER_SIZE > buffer_capacity){
101
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
102
if (buffer == NULL){
103
return 0;
104
}
105
buffer_capacity += BUFFER_SIZE;
106
}
107
return buffer_capacity;
108
}
109
110
/*
111
* Decrypt OpenPGP data using keyrings in HOMEDIR.
112
* Returns -1 on error
113
*/
114
static ssize_t pgp_packet_decrypt (const char *cryptotext,
115
size_t crypto_size,
116
char **plaintext,
90
117
const char *homedir){
91
118
gpgme_data_t dh_crypto, dh_plain;
92
119
gpgme_ctx_t ctx;
93
120
gpgme_error_t rc;
94
121
ssize_t ret;
95
ssize_t new_packet_capacity = 0;
96
ssize_t new_packet_length = 0;
122
size_t plaintext_capacity = 0;
123
ssize_t plaintext_length = 0;
97
124
gpgme_engine_info_t engine_info;
98
125
99
126
if (debug){
100
fprintf(stderr, "Trying to decrypt OpenPGP packet\n");
127
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
101
128
}
102
129
103
130
/* Init GPGME */
109
136
return -1;
110
137
}
111
138
112
/* Set GPGME home directory */
139
/* Set GPGME home directory for the OpenPGP engine only */
113
140
rc = gpgme_get_engine_info (&engine_info);
114
141
if (rc != GPG_ERR_NO_ERROR){
115
142
fprintf(stderr, "bad gpgme_get_engine_info: %s: %s\n",
125
152
engine_info = engine_info->next;
126
153
}
127
154
if(engine_info == NULL){
128
fprintf(stderr, "Could not set home dir to %s\n", homedir);
155
fprintf(stderr, "Could not set GPGME home dir to %s\n", homedir);
129
156
return -1;
130
157
}
131
158
132
/* Create new GPGME data buffer from packet buffer */
133
rc = gpgme_data_new_from_mem(&dh_crypto, packet, packet_size, 0);
159
/* Create new GPGME data buffer from memory cryptotext */
160
rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,
161
0);
134
162
if (rc != GPG_ERR_NO_ERROR){
135
163
fprintf(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
136
164
gpgme_strsource(rc), gpgme_strerror(rc));
142
170
if (rc != GPG_ERR_NO_ERROR){
143
171
fprintf(stderr, "bad gpgme_data_new: %s: %s\n",
144
172
gpgme_strsource(rc), gpgme_strerror(rc));
173
gpgme_data_release(dh_crypto);
145
174
return -1;
146
175
}
147
176
150
179
if (rc != GPG_ERR_NO_ERROR){
151
180
fprintf(stderr, "bad gpgme_new: %s: %s\n",
152
181
gpgme_strsource(rc), gpgme_strerror(rc));
153
return -1;
182
plaintext_length = -1;
183
goto decrypt_end;
154
184
}
155
185
156
/* Decrypt data from the FILE pointer to the plaintext data
157
buffer */
186
/* Decrypt data from the cryptotext data buffer to the plaintext
187
data buffer */
158
188
rc = gpgme_op_decrypt(ctx, dh_crypto, dh_plain);
159
189
if (rc != GPG_ERR_NO_ERROR){
160
190
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
161
191
gpgme_strsource(rc), gpgme_strerror(rc));
162
return -1;
192
plaintext_length = -1;
193
goto decrypt_end;
163
194
}
164
195
165
196
if(debug){
166
fprintf(stderr, "Decryption of OpenPGP packet succeeded\n");
197
fprintf(stderr, "Decryption of OpenPGP data succeeded\n");
167
198
}
168
199
169
200
if (debug){
170
201
gpgme_decrypt_result_t result;
171
202
result = gpgme_op_decrypt_result(ctx);
195
226
}
196
227
}
197
228
198
/* Delete the GPGME FILE pointer cryptotext data buffer */
199
gpgme_data_release(dh_crypto);
200
201
229
/* Seek back to the beginning of the GPGME plaintext data buffer */
202
230
if (gpgme_data_seek(dh_plain, (off_t) 0, SEEK_SET) == -1){
203
231
perror("pgpme_data_seek");
232
plaintext_length = -1;
233
goto decrypt_end;
204
234
}
205
235
206
*new_packet = 0;
236
*plaintext = NULL;
207
237
while(true){
208
if (new_packet_length + BUFFER_SIZE > new_packet_capacity){
209
*new_packet = realloc(*new_packet,
210
(unsigned int)new_packet_capacity
211
+ BUFFER_SIZE);
212
if (*new_packet == NULL){
213
perror("realloc");
214
return -1;
215
}
216
new_packet_capacity += BUFFER_SIZE;
238
plaintext_capacity = adjustbuffer(plaintext,
239
(size_t)plaintext_length,
240
plaintext_capacity);
241
if (plaintext_capacity == 0){
242
perror("adjustbuffer");
243
plaintext_length = -1;
244
goto decrypt_end;
217
245
}
218
246
219
ret = gpgme_data_read(dh_plain, *new_packet + new_packet_length,
247
ret = gpgme_data_read(dh_plain, *plaintext + plaintext_length,
220
248
BUFFER_SIZE);
221
249
/* Print the data, if any */
222
250
if (ret == 0){
251
/* EOF */
223
252
break;
224
253
}
225
254
if(ret < 0){
226
255
perror("gpgme_data_read");
227
return -1;
256
plaintext_length = -1;
257
goto decrypt_end;
228
258
}
229
new_packet_length += ret;
259
plaintext_length += ret;
230
260
}
231
261
232
/* FIXME: check characters before printing to screen so to not print
233
terminal control characters */
234
/* if(debug){ */
235
/* fprintf(stderr, "decrypted password is: "); */
236
/* fwrite(*new_packet, 1, new_packet_length, stderr); */
237
/* fprintf(stderr, "\n"); */
238
/* } */
262
if(debug){
263
fprintf(stderr, "Decrypted password is: ");
264
for(ssize_t i = 0; i < plaintext_length; i++){
265
fprintf(stderr, "%02hhX ", (*plaintext)[i]);
266
}
267
fprintf(stderr, "\n");
268
}
269
270
decrypt_end:
271
272
/* Delete the GPGME cryptotext data buffer */
273
gpgme_data_release(dh_crypto);
239
274
240
275
/* Delete the GPGME plaintext data buffer */
241
276
gpgme_data_release(dh_plain);
242
return new_packet_length;
277
return plaintext_length;
243
278
}
244
279
245
280
static const char * safer_gnutls_strerror (int value) {
249
284
return ret;
250
285
}
251
286
287
/* GnuTLS log function callback */
252
288
static void debuggnutls(__attribute__((unused)) int level,
253
289
const char* string){
254
fprintf(stderr, "%s", string);
290
fprintf(stderr, "GnuTLS: %s", string);
255
291
}
256
292
257
static int initgnutls(mandos_context *mc, gnutls_session_t *session,
258
gnutls_dh_params_t *dh_params){
259
const char *err;
293
static int init_gnutls_global(mandos_context *mc,
294
const char *pubkeyfile,
295
const char *seckeyfile){
260
296
int ret;
261
297
262
298
if(debug){
265
301
266
302
if ((ret = gnutls_global_init ())
267
303
!= GNUTLS_E_SUCCESS) {
268
fprintf (stderr, "global_init: %s\n", safer_gnutls_strerror(ret));
304
fprintf (stderr, "GnuTLS global_init: %s\n",
305
safer_gnutls_strerror(ret));
269
306
return -1;
270
307
}
271
308
272
309
if (debug){
310
/* "Use a log level over 10 to enable all debugging options."
311
* - GnuTLS manual
312
*/
273
313
gnutls_global_set_log_level(11);
274
314
gnutls_global_set_log_function(debuggnutls);
275
315
}
276
316
277
/* openpgp credentials */
317
/* OpenPGP credentials */
278
318
if ((ret = gnutls_certificate_allocate_credentials (&mc->cred))
279
319
!= GNUTLS_E_SUCCESS) {
280
fprintf (stderr, "memory error: %s\n",
320
fprintf (stderr, "GnuTLS memory error: %s\n",
281
321
safer_gnutls_strerror(ret));
282
322
return -1;
283
323
}
291
331
ret = gnutls_certificate_set_openpgp_key_file
292
332
(mc->cred, pubkeyfile, seckeyfile, GNUTLS_OPENPGP_FMT_BASE64);
293
333
if (ret != GNUTLS_E_SUCCESS) {
294
fprintf
295
(stderr, "Error[%d] while reading the OpenPGP key pair ('%s',"
296
" '%s')\n",
297
ret, pubkeyfile, seckeyfile);
298
fprintf(stdout, "The Error is: %s\n",
334
fprintf(stderr,
335
"Error[%d] while reading the OpenPGP key pair ('%s',"
336
" '%s')\n", ret, pubkeyfile, seckeyfile);
337
fprintf(stdout, "The GnuTLS error is: %s\n",
299
338
safer_gnutls_strerror(ret));
300
339
return -1;
301
340
}
302
341
303
//GnuTLS server initialization
304
if ((ret = gnutls_dh_params_init(dh_params))
305
!= GNUTLS_E_SUCCESS) {
306
fprintf (stderr, "Error in dh parameter initialization: %s\n",
307
safer_gnutls_strerror(ret));
308
return -1;
309
}
310
311
if ((ret = gnutls_dh_params_generate2(*dh_params, mc->dh_bits))
312
!= GNUTLS_E_SUCCESS) {
313
fprintf (stderr, "Error in prime generation: %s\n",
314
safer_gnutls_strerror(ret));
315
return -1;
316
}
317
318
gnutls_certificate_set_dh_params(mc->cred, *dh_params);
319
320
// GnuTLS session creation
321
if ((ret = gnutls_init(session, GNUTLS_SERVER))
322
!= GNUTLS_E_SUCCESS){
342
/* GnuTLS server initialization */
343
ret = gnutls_dh_params_init(&mc->dh_params);
344
if (ret != GNUTLS_E_SUCCESS) {
345
fprintf (stderr, "Error in GnuTLS DH parameter initialization:"
346
" %s\n", safer_gnutls_strerror(ret));
347
return -1;
348
}
349
ret = gnutls_dh_params_generate2(mc->dh_params, mc->dh_bits);
350
if (ret != GNUTLS_E_SUCCESS) {
351
fprintf (stderr, "Error in GnuTLS prime generation: %s\n",
352
safer_gnutls_strerror(ret));
353
return -1;
354
}
355
356
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
357
358
return 0;
359
}
360
361
static int init_gnutls_session(mandos_context *mc,
362
gnutls_session_t *session){
363
int ret;
364
/* GnuTLS session creation */
365
ret = gnutls_init(session, GNUTLS_SERVER);
366
if (ret != GNUTLS_E_SUCCESS){
323
367
fprintf(stderr, "Error in GnuTLS session initialization: %s\n",
324
368
safer_gnutls_strerror(ret));
325
369
}
326
370
327
if ((ret = gnutls_priority_set_direct(*session, mc->priority, &err))
328
!= GNUTLS_E_SUCCESS) {
329
fprintf(stderr, "Syntax error at: %s\n", err);
330
fprintf(stderr, "GnuTLS error: %s\n",
331
safer_gnutls_strerror(ret));
332
return -1;
371
{
372
const char *err;
373
ret = gnutls_priority_set_direct(*session, mc->priority, &err);
374
if (ret != GNUTLS_E_SUCCESS) {
375
fprintf(stderr, "Syntax error at: %s\n", err);
376
fprintf(stderr, "GnuTLS error: %s\n",
377
safer_gnutls_strerror(ret));
378
return -1;
379
}
333
380
}
334
381
335
if ((ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,
336
mc->cred))
337
!= GNUTLS_E_SUCCESS) {
338
fprintf(stderr, "Error setting a credentials set: %s\n",
382
ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,
383
mc->cred);
384
if (ret != GNUTLS_E_SUCCESS) {
385
fprintf(stderr, "Error setting GnuTLS credentials: %s\n",
339
386
safer_gnutls_strerror(ret));
340
387
return -1;
341
388
}
349
396
return 0;
350
397
}
351
398
399
/* Avahi log function callback */
352
400
static void empty_log(__attribute__((unused)) AvahiLogLevel level,
353
401
__attribute__((unused)) const char *txt){}
354
402
403
/* Called when a Mandos server is found */
355
404
static int start_mandos_communication(const char *ip, uint16_t port,
356
405
AvahiIfIndex if_index,
357
406
mandos_context *mc){
358
407
int ret, tcp_sd;
359
struct sockaddr_in6 to;
408
union { struct sockaddr in; struct sockaddr_in6 in6; } to;
360
409
char *buffer = NULL;
361
410
char *decrypted_buffer;
362
411
size_t buffer_length = 0;
363
412
size_t buffer_capacity = 0;
364
413
ssize_t decrypted_buffer_size;
365
size_t written = 0;
414
size_t written;
366
415
int retval = 0;
367
416
char interface[IF_NAMESIZE];
368
417
gnutls_session_t session;
369
gnutls_dh_params_t dh_params;
418
419
ret = init_gnutls_session (mc, &session);
420
if (ret != 0){
421
return -1;
422
}
370
423
371
424
if(debug){
372
425
fprintf(stderr, "Setting up a tcp connection to %s, port %d\n",
388
441
}
389
442
390
443
memset(&to,0,sizeof(to)); /* Spurious warning */
391
to.sin6_family = AF_INET6;
392
ret = inet_pton(AF_INET6, ip, &to.sin6_addr);
444
to.in6.sin6_family = AF_INET6;
445
/* It would be nice to have a way to detect if we were passed an
446
IPv4 address here. Now we assume an IPv6 address. */
447
ret = inet_pton(AF_INET6, ip, &to.in6.sin6_addr);
393
448
if (ret < 0 ){
394
449
perror("inet_pton");
395
450
return -1;
398
453
fprintf(stderr, "Bad address: %s\n", ip);
399
454
return -1;
400
455
}
401
to.sin6_port = htons(port); /* Spurious warning */
456
to.in6.sin6_port = htons(port); /* Spurious warning */
402
457
403
to.sin6_scope_id = (uint32_t)if_index;
458
to.in6.sin6_scope_id = (uint32_t)if_index;
404
459
405
460
if(debug){
406
461
fprintf(stderr, "Connection to: %s, port %d\n", ip, port);
407
462
char addrstr[INET6_ADDRSTRLEN] = "";
408
if(inet_ntop(to.sin6_family, &(to.sin6_addr), addrstr,
463
if(inet_ntop(to.in6.sin6_family, &(to.in6.sin6_addr), addrstr,
409
464
sizeof(addrstr)) == NULL){
410
465
perror("inet_ntop");
411
466
} else {
415
470
}
416
471
}
417
472
418
ret = connect(tcp_sd, (struct sockaddr *) &to, sizeof(to));
473
ret = connect(tcp_sd, &to.in, sizeof(to));
419
474
if (ret < 0){
420
475
perror("connect");
421
476
return -1;
422
477
}
423
424
ret = initgnutls (mc, &session, &dh_params);
425
if (ret != 0){
426
retval = -1;
427
return -1;
478
479
const char *out = mandos_protocol_version;
480
written = 0;
481
while (true){
482
size_t out_size = strlen(out);
483
ret = TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
484
out_size - written));
485
if (ret == -1){
486
perror("write");
487
retval = -1;
488
goto mandos_end;
489
}
490
written += (size_t)ret;
491
if(written < out_size){
492
continue;
493
} else {
494
if (out == mandos_protocol_version){
495
written = 0;
496
out = "\r\n";
497
} else {
498
break;
499
}
500
}
501
}
502
503
if(debug){
504
fprintf(stderr, "Establishing TLS session with %s\n", ip);
428
505
}
429
506
430
507
gnutls_transport_set_ptr (session, (gnutls_transport_ptr_t) tcp_sd);
431
508
432
if(debug){
433
fprintf(stderr, "Establishing TLS session with %s\n", ip);
434
}
435
436
509
ret = gnutls_handshake (session);
437
510
438
511
if (ret != GNUTLS_E_SUCCESS){
439
512
if(debug){
440
fprintf(stderr, "\n*** Handshake failed ***\n");
513
fprintf(stderr, "*** GnuTLS Handshake failed ***\n");
441
514
gnutls_perror (ret);
442
515
}
443
516
retval = -1;
444
goto exit;
517
goto mandos_end;
445
518
}
446
519
447
//Retrieve OpenPGP packet that contains the wanted password
520
/* Read OpenPGP packet that contains the wanted password */
448
521
449
522
if(debug){
450
523
fprintf(stderr, "Retrieving pgp encrypted password from %s\n",
452
525
}
453
526
454
527
while(true){
455
if (buffer_length + BUFFER_SIZE > buffer_capacity){
456
buffer = realloc(buffer, buffer_capacity + BUFFER_SIZE);
457
if (buffer == NULL){
458
perror("realloc");
459
goto exit;
460
}
461
buffer_capacity += BUFFER_SIZE;
528
buffer_capacity = adjustbuffer(&buffer, buffer_length,
529
buffer_capacity);
530
if (buffer_capacity == 0){
531
perror("adjustbuffer");
532
retval = -1;
533
goto mandos_end;
462
534
}
463
535
464
536
ret = gnutls_record_recv(session, buffer+buffer_length,
474
546
case GNUTLS_E_REHANDSHAKE:
475
547
ret = gnutls_handshake (session);
476
548
if (ret < 0){
477
fprintf(stderr, "\n*** Handshake failed ***\n");
549
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
478
550
gnutls_perror (ret);
479
551
retval = -1;
480
goto exit;
552
goto mandos_end;
481
553
}
482
554
break;
483
555
default:
484
556
fprintf(stderr, "Unknown error while reading data from"
485
" encrypted session with mandos server\n");
557
" encrypted session with Mandos server\n");
486
558
retval = -1;
487
559
gnutls_bye (session, GNUTLS_SHUT_RDWR);
488
goto exit;
560
goto mandos_end;
489
561
}
490
562
} else {
491
563
buffer_length += (size_t) ret;
492
564
}
493
565
}
494
566
567
if(debug){
568
fprintf(stderr, "Closing TLS session\n");
569
}
570
571
gnutls_bye (session, GNUTLS_SHUT_RDWR);
572
495
573
if (buffer_length > 0){
496
574
decrypted_buffer_size = pgp_packet_decrypt(buffer,
497
575
buffer_length,
498
576
&decrypted_buffer,
499
577
keydir);
500
578
if (decrypted_buffer_size >= 0){
579
written = 0;
501
580
while(written < (size_t) decrypted_buffer_size){
502
581
ret = (int)fwrite (decrypted_buffer + written, 1,
503
582
(size_t)decrypted_buffer_size - written,
517
596
retval = -1;
518
597
}
519
598
}
520
521
//shutdown procedure
522
523
if(debug){
524
fprintf(stderr, "Closing TLS session\n");
525
}
526
599
600
/* Shutdown procedure */
601
602
mandos_end:
527
603
free(buffer);
528
gnutls_bye (session, GNUTLS_SHUT_RDWR);
529
exit:
530
604
close(tcp_sd);
531
605
gnutls_deinit (session);
532
606
gnutls_certificate_free_credentials (mc->cred);
534
608
return retval;
535
609
}
536
610
537
static void resolve_callback( AvahiSServiceResolver *r,
538
AvahiIfIndex interface,
539
AVAHI_GCC_UNUSED AvahiProtocol protocol,
540
AvahiResolverEvent event,
541
const char *name,
542
const char *type,
543
const char *domain,
544
const char *host_name,
545
const AvahiAddress *address,
546
uint16_t port,
547
AVAHI_GCC_UNUSED AvahiStringList *txt,
548
AVAHI_GCC_UNUSED AvahiLookupResultFlags flags,
549
void* userdata) {
611
static void resolve_callback(AvahiSServiceResolver *r,
612
AvahiIfIndex interface,
613
AVAHI_GCC_UNUSED AvahiProtocol protocol,
614
AvahiResolverEvent event,
615
const char *name,
616
const char *type,
617
const char *domain,
618
const char *host_name,
619
const AvahiAddress *address,
620
uint16_t port,
621
AVAHI_GCC_UNUSED AvahiStringList *txt,
622
AVAHI_GCC_UNUSED AvahiLookupResultFlags
623
flags,
624
void* userdata) {
550
625
mandos_context *mc = userdata;
551
626
assert(r); /* Spurious warning */
552
627
556
631
switch (event) {
557
632
default:
558
633
case AVAHI_RESOLVER_FAILURE:
559
fprintf(stderr, "(Resolver) Failed to resolve service '%s' of"
560
" type '%s' in domain '%s': %s\n", name, type, domain,
634
fprintf(stderr, "(Avahi Resolver) Failed to resolve service '%s'"
635
" of type '%s' in domain '%s': %s\n", name, type, domain,
561
636
avahi_strerror(avahi_server_errno(mc->server)));
562
637
break;
563
638
566
641
char ip[AVAHI_ADDRESS_STR_MAX];
567
642
avahi_address_snprint(ip, sizeof(ip), address);
568
643
if(debug){
569
fprintf(stderr, "Mandos server \"%s\" found on %s (%s) on"
570
" port %d\n", name, host_name, ip, port);
644
fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %d) on"
645
" port %d\n", name, host_name, ip, interface, port);
571
646
}
572
647
int ret = start_mandos_communication(ip, port, interface, mc);
573
648
if (ret == 0){
585
660
const char *name,
586
661
const char *type,
587
662
const char *domain,
588
AVAHI_GCC_UNUSED AvahiLookupResultFlags flags,
663
AVAHI_GCC_UNUSED AvahiLookupResultFlags
664
flags,
589
665
void* userdata) {
590
666
mandos_context *mc = userdata;
591
667
assert(b); /* Spurious warning */
597
673
default:
598
674
case AVAHI_BROWSER_FAILURE:
599
675
600
fprintf(stderr, "(Browser) %s\n",
676
fprintf(stderr, "(Avahi browser) %s\n",
601
677
avahi_strerror(avahi_server_errno(mc->server)));
602
678
avahi_simple_poll_quit(mc->simple_poll);
603
679
return;
604
680
605
681
case AVAHI_BROWSER_NEW:
606
/* We ignore the returned resolver object. In the callback
607
function we free it. If the server is terminated before
608
the callback function is called the server will free
609
the resolver for us. */
682
/* We ignore the returned Avahi resolver object. In the callback
683
function we free it. If the Avahi server is terminated before
684
the callback function is called the Avahi server will free the
685
resolver for us. */
610
686
611
if (!(avahi_s_service_resolver_new(mc->server, interface, protocol, name,
612
type, domain,
687
if (!(avahi_s_service_resolver_new(mc->server, interface,
688
protocol, name, type, domain,
613
689
AVAHI_PROTO_INET6, 0,
614
690
resolve_callback, mc)))
615
fprintf(stderr, "Failed to resolve service '%s': %s\n", name,
616
avahi_strerror(avahi_server_errno(mc->server)));
691
fprintf(stderr, "Avahi: Failed to resolve service '%s': %s\n",
692
name, avahi_strerror(avahi_server_errno(mc->server)));
617
693
break;
618
694
619
695
case AVAHI_BROWSER_REMOVE:
621
697
622
698
case AVAHI_BROWSER_ALL_FOR_NOW:
623
699
case AVAHI_BROWSER_CACHE_EXHAUSTED:
700
if(debug){
701
fprintf(stderr, "No Mandos server found, still searching...\n");
702
}
624
703
break;
625
704
}
626
705
}
646
725
}
647
726
648
727
649
int main(AVAHI_GCC_UNUSED int argc, AVAHI_GCC_UNUSED char*argv[]) {
650
AvahiServerConfig config;
728
int main(int argc, char *argv[]){
651
729
AvahiSServiceBrowser *sb = NULL;
652
730
int error;
653
731
int ret;
654
int debug_int;
655
int returncode = EXIT_SUCCESS;
732
int exitcode = EXIT_SUCCESS;
656
733
const char *interface = "eth0";
657
734
struct ifreq network;
658
735
int sd;
736
uid_t uid;
737
gid_t gid;
659
738
char *connect_to = NULL;
660
739
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
740
const char *pubkeyfile = "pubkey.txt";
741
const char *seckeyfile = "seckey.txt";
661
742
mandos_context mc = { .simple_poll = NULL, .server = NULL,
662
743
.dh_bits = 1024, .priority = "SECURE256"};
663
744
664
debug_int = debug ? 1 : 0;
665
while (true){
666
struct option long_options[] = {
667
{"debug", no_argument, &debug_int, 1},
668
{"connect", required_argument, NULL, 'c'},
669
{"interface", required_argument, NULL, 'i'},
670
{"keydir", required_argument, NULL, 'd'},
671
{"seckey", required_argument, NULL, 's'},
672
{"pubkey", required_argument, NULL, 'p'},
673
{"dh-bits", required_argument, NULL, 'D'},
674
{"priority", required_argument, NULL, 'P'},
675
{0, 0, 0, 0} };
676
677
int option_index = 0;
678
ret = getopt_long (argc, argv, "i:", long_options,
679
&option_index);
680
681
if (ret == -1){
682
break;
683
}
684
685
switch(ret){
686
case 0:
687
break;
688
case 'i':
689
interface = optarg;
690
break;
691
case 'c':
692
connect_to = optarg;
693
break;
694
case 'd':
695
keydir = optarg;
696
break;
697
case 'p':
698
pubkeyfile = optarg;
699
break;
700
case 's':
701
seckeyfile = optarg;
702
break;
703
case 'D':
704
errno = 0;
705
mc.dh_bits = (unsigned int) strtol(optarg, NULL, 10);
706
if (errno){
707
perror("strtol");
708
exit(EXIT_FAILURE);
745
{
746
struct argp_option options[] = {
747
{ .name = "debug", .key = 128,
748
.doc = "Debug mode", .group = 3 },
749
{ .name = "connect", .key = 'c',
750
.arg = "IP",
751
.doc = "Connect directly to a sepcified mandos server",
752
.group = 1 },
753
{ .name = "interface", .key = 'i',
754
.arg = "INTERFACE",
755
.doc = "Interface that Avahi will conntect through",
756
.group = 1 },
757
{ .name = "keydir", .key = 'd',
758
.arg = "KEYDIR",
759
.doc = "Directory where the openpgp keyring is",
760
.group = 1 },
761
{ .name = "seckey", .key = 's',
762
.arg = "SECKEY",
763
.doc = "Secret openpgp key for gnutls authentication",
764
.group = 1 },
765
{ .name = "pubkey", .key = 'p',
766
.arg = "PUBKEY",
767
.doc = "Public openpgp key for gnutls authentication",
768
.group = 2 },
769
{ .name = "dh-bits", .key = 129,
770
.arg = "BITS",
771
.doc = "dh-bits to use in gnutls communication",
772
.group = 2 },
773
{ .name = "priority", .key = 130,
774
.arg = "PRIORITY",
775
.doc = "GNUTLS priority", .group = 1 },
776
{ .name = NULL }
777
};
778
779
780
error_t parse_opt (int key, char *arg,
781
struct argp_state *state) {
782
/* Get the INPUT argument from `argp_parse', which we know is
783
a pointer to our plugin list pointer. */
784
switch (key) {
785
case 128:
786
debug = true;
787
break;
788
case 'c':
789
connect_to = arg;
790
break;
791
case 'i':
792
interface = arg;
793
break;
794
case 'd':
795
keydir = arg;
796
break;
797
case 's':
798
seckeyfile = arg;
799
break;
800
case 'p':
801
pubkeyfile = arg;
802
break;
803
case 129:
804
errno = 0;
805
mc.dh_bits = (unsigned int) strtol(arg, NULL, 10);
806
if (errno){
807
perror("strtol");
808
exit(EXIT_FAILURE);
809
}
810
break;
811
case 130:
812
mc.priority = arg;
813
break;
814
case ARGP_KEY_ARG:
815
argp_usage (state);
816
break;
817
case ARGP_KEY_END:
818
break;
819
default:
820
return ARGP_ERR_UNKNOWN;
709
821
}
710
break;
711
case 'P':
712
mc.priority = optarg;
713
break;
714
case '?':
715
default:
716
exit(EXIT_FAILURE);
822
return 0;
717
823
}
824
825
struct argp argp = { .options = options, .parser = parse_opt,
826
.args_doc = "",
827
.doc = "Mandos client -- Get and decrypt"
828
" passwords from mandos server" };
829
argp_parse (&argp, argc, argv, 0, 0, NULL);
718
830
}
719
debug = debug_int ? true : false;
720
831
721
832
pubkeyfile = combinepath(keydir, pubkeyfile);
722
833
if (pubkeyfile == NULL){
723
834
perror("combinepath");
724
returncode = EXIT_FAILURE;
725
goto exit;
835
exitcode = EXIT_FAILURE;
836
goto end;
726
837
}
727
838
728
839
seckeyfile = combinepath(keydir, seckeyfile);
729
840
if (seckeyfile == NULL){
730
841
perror("combinepath");
731
goto exit;
842
goto end;
843
}
844
845
ret = init_gnutls_global(&mc, pubkeyfile, seckeyfile);
846
if (ret == -1){
847
fprintf(stderr, "init_gnutls_global\n");
848
goto end;
849
}
850
851
uid = getuid();
852
gid = getgid();
853
854
ret = setuid(uid);
855
if (ret == -1){
856
perror("setuid");
857
}
858
859
setgid(gid);
860
if (ret == -1){
861
perror("setgid");
732
862
}
733
863
734
864
if_index = (AvahiIfIndex) if_nametoindex(interface);
743
873
char *address = strrchr(connect_to, ':');
744
874
if(address == NULL){
745
875
fprintf(stderr, "No colon in address\n");
746
exit(EXIT_FAILURE);
876
exitcode = EXIT_FAILURE;
877
goto end;
747
878
}
748
879
errno = 0;
749
880
uint16_t port = (uint16_t) strtol(address+1, NULL, 10);
750
881
if(errno){
751
882
perror("Bad port number");
752
exit(EXIT_FAILURE);
883
exitcode = EXIT_FAILURE;
884
goto end;
753
885
}
754
886
*address = '\0';
755
887
address = connect_to;
756
888
ret = start_mandos_communication(address, port, if_index, &mc);
757
889
if(ret < 0){
758
exit(EXIT_FAILURE);
890
exitcode = EXIT_FAILURE;
759
891
} else {
760
exit(EXIT_SUCCESS);
892
exitcode = EXIT_SUCCESS;
761
893
}
894
goto end;
762
895
}
763
896
764
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
765
if(sd < 0) {
766
perror("socket");
767
returncode = EXIT_FAILURE;
768
goto exit;
769
}
770
strcpy(network.ifr_name, interface); /* Spurious warning */
771
ret = ioctl(sd, SIOCGIFFLAGS, &network);
772
if(ret == -1){
773
774
perror("ioctl SIOCGIFFLAGS");
775
returncode = EXIT_FAILURE;
776
goto exit;
777
}
778
if((network.ifr_flags & IFF_UP) == 0){
779
network.ifr_flags |= IFF_UP;
780
ret = ioctl(sd, SIOCSIFFLAGS, &network);
897
/* If the interface is down, bring it up */
898
{
899
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
900
if(sd < 0) {
901
perror("socket");
902
exitcode = EXIT_FAILURE;
903
goto end;
904
}
905
strcpy(network.ifr_name, interface); /* Spurious warning */
906
ret = ioctl(sd, SIOCGIFFLAGS, &network);
781
907
if(ret == -1){
782
perror("ioctl SIOCSIFFLAGS");
783
returncode = EXIT_FAILURE;
784
goto exit;
785
}
908
perror("ioctl SIOCGIFFLAGS");
909
exitcode = EXIT_FAILURE;
910
goto end;
911
}
912
if((network.ifr_flags & IFF_UP) == 0){
913
network.ifr_flags |= IFF_UP;
914
ret = ioctl(sd, SIOCSIFFLAGS, &network);
915
if(ret == -1){
916
perror("ioctl SIOCSIFFLAGS");
917
exitcode = EXIT_FAILURE;
918
goto end;
919
}
920
}
921
close(sd);
786
922
}
787
close(sd);
788
923
789
924
if (not debug){
790
925
avahi_set_log_function(empty_log);
791
926
}
792
927
793
/* Initialize the psuedo-RNG */
928
/* Initialize the pseudo-RNG for Avahi */
794
929
srand((unsigned int) time(NULL));
795
796
/* Allocate main loop object */
797
if (!(mc.simple_poll = avahi_simple_poll_new())) {
798
fprintf(stderr, "Failed to create simple poll object.\n");
799
returncode = EXIT_FAILURE;
800
goto exit;
801
}
802
803
/* Do not publish any local records */
804
avahi_server_config_init(&config);
805
config.publish_hinfo = 0;
806
config.publish_addresses = 0;
807
config.publish_workstation = 0;
808
config.publish_domain = 0;
809
810
/* Allocate a new server */
811
mc.server=avahi_server_new(avahi_simple_poll_get(mc.simple_poll),
812
&config, NULL, NULL, &error);
813
814
/* Free the configuration data */
815
avahi_server_config_free(&config);
816
817
/* Check if creating the server object succeeded */
818
if (!mc.server) {
819
fprintf(stderr, "Failed to create server: %s\n",
930
931
/* Allocate main Avahi loop object */
932
mc.simple_poll = avahi_simple_poll_new();
933
if (mc.simple_poll == NULL) {
934
fprintf(stderr, "Avahi: Failed to create simple poll"
935
" object.\n");
936
exitcode = EXIT_FAILURE;
937
goto end;
938
}
939
940
{
941
AvahiServerConfig config;
942
/* Do not publish any local Zeroconf records */
943
avahi_server_config_init(&config);
944
config.publish_hinfo = 0;
945
config.publish_addresses = 0;
946
config.publish_workstation = 0;
947
config.publish_domain = 0;
948
949
/* Allocate a new server */
950
mc.server = avahi_server_new(avahi_simple_poll_get
951
(mc.simple_poll), &config, NULL,
952
NULL, &error);
953
954
/* Free the Avahi configuration data */
955
avahi_server_config_free(&config);
956
}
957
958
/* Check if creating the Avahi server object succeeded */
959
if (mc.server == NULL) {
960
fprintf(stderr, "Failed to create Avahi server: %s\n",
820
961
avahi_strerror(error));
821
returncode = EXIT_FAILURE;
822
goto exit;
962
exitcode = EXIT_FAILURE;
963
goto end;
823
964
}
824
965
825
/* Create the service browser */
966
/* Create the Avahi service browser */
826
967
sb = avahi_s_service_browser_new(mc.server, if_index,
827
968
AVAHI_PROTO_INET6,
828
969
"_mandos._tcp", NULL, 0,
829
970
browse_callback, &mc);
830
if (!sb) {
971
if (sb == NULL) {
831
972
fprintf(stderr, "Failed to create service browser: %s\n",
832
973
avahi_strerror(avahi_server_errno(mc.server)));
833
returncode = EXIT_FAILURE;
834
goto exit;
974
exitcode = EXIT_FAILURE;
975
goto end;
835
976
}
836
977
837
978
/* Run the main loop */
838
979
839
980
if (debug){
840
fprintf(stderr, "Starting avahi loop search\n");
981
fprintf(stderr, "Starting Avahi loop search\n");
841
982
}
842
983
843
984
avahi_simple_poll_loop(mc.simple_poll);
844
985
845
exit:
986
end:
846
987
847
988
if (debug){
848
989
fprintf(stderr, "%s exiting\n", argv[0]);
849
990
}
850
991
851
992
/* Cleanup things */
852
if (sb)
993
if (sb != NULL)
853
994
avahi_s_service_browser_free(sb);
854
995
855
if (mc.server)
996
if (mc.server != NULL)
856
997
avahi_server_free(mc.server);
857
998
858
if (mc.simple_poll)
999
if (mc.simple_poll != NULL)
859
1000
avahi_simple_poll_free(mc.simple_poll);
860
1001
free(pubkeyfile);
861
1002
free(seckeyfile);
862
1003
863
return returncode;
1004
return exitcode;
864
1005
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0