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- Committer: Teddy Hogeborn
- Date: 2008-08-03 01:09:36 UTC
- mfrom: (24.1.9 mandos)
- Revision ID: teddy@fukt.bsnet.se-20080803010936-ujme8tgxceszfbi1
* plugbasedclient.c (main): New "--userid" and "--groupid" options.
Take an additional non-option argument and
parse it as a plus-separated and -prefixed
list of additional options.
* plugins.d/mandosclient.c (DH_BITS): Replaced with
"mandos_context.dh_bits". All
users changed.
(certdir): Renamed to "keydir". All users changed.
(certfile): Renamed to "pubkeyfile". All users changed.
(certkey): Renamed to "seckeyfile". All users changed.
(encrypted_session): Replaced with "mandos_context". All users
changed.
(initgnutls): Take additional "session" and "dh_params" arguments.
All callers changed.
(start_mandos_communication): Take additional "mc" argument. All
callers changed. Print target IPv6
address if different than supplied
string.
(simple_poll) Replaced with "mandos_context.simple_poll". All users
changed.
(server): Replaced with "mandos_context.server". All users changed.
(main): Default interface to "eth0". Rename "--certdir" to
"--keydir", "--certkey" to "--seckey", and "--certfile" to
"--pubkey". New options "--dh-bits" and "--priority". If
the interface is not up, bring it up.
Take an additional non-option argument and
parse it as a plus-separated and -prefixed
list of additional options.
* plugins.d/mandosclient.c (DH_BITS): Replaced with
"mandos_context.dh_bits". All
users changed.
(certdir): Renamed to "keydir". All users changed.
(certfile): Renamed to "pubkeyfile". All users changed.
(certkey): Renamed to "seckeyfile". All users changed.
(encrypted_session): Replaced with "mandos_context". All users
changed.
(initgnutls): Take additional "session" and "dh_params" arguments.
All callers changed.
(start_mandos_communication): Take additional "mc" argument. All
callers changed. Print target IPv6
address if different than supplied
string.
(simple_poll) Replaced with "mandos_context.simple_poll". All users
changed.
(server): Replaced with "mandos_context.server". All users changed.
(main): Default interface to "eth0". Rename "--certdir" to
"--keydir", "--certkey" to "--seckey", and "--certfile" to
"--pubkey". New options "--dh-bits" and "--priority". If
the interface is not up, bring it up.
- files added:
- ca.pem
- files removed:
- network-protocol.txt
- files modified:
- TODO
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
37
35
#include <stdio.h>
38
36
#include <assert.h>
39
37
#include <stdlib.h>
40
38
#include <time.h>
41
39
#include <net/if.h> /* if_nametoindex */
42
#include <sys/ioctl.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
43
SIOCSIFFLAGS */
44
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
45
SIOCSIFFLAGS */
40
#include <sys/ioctl.h> // ioctl, ifreq, SIOCGIFFLAGS, IFF_UP, SIOCSIFFLAGS
41
#include <net/if.h> // ioctl, ifreq, SIOCGIFFLAGS, IFF_UP, SIOCSIFFLAGS
46
42
47
43
#include <avahi-core/core.h>
48
44
#include <avahi-core/lookup.h>
51
47
#include <avahi-common/malloc.h>
52
48
#include <avahi-common/error.h>
53
49
54
/* Mandos client part */
50
//mandos client part
55
51
#include <sys/types.h> /* socket(), inet_pton() */
56
52
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
57
53
struct in6_addr, inet_pton() */
64
60
#include <string.h> /* memset */
65
61
#include <arpa/inet.h> /* inet_pton() */
66
62
#include <iso646.h> /* not */
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 */
63
64
// gpgme
72
65
#include <errno.h> /* perror() */
73
66
#include <gpgme.h>
74
67
68
// getopt_long
69
#include <getopt.h>
70
75
71
#define BUFFER_SIZE 256
76
72
73
static const char *keydir = "/conf/conf.d/mandos";
74
static const char *pubkeyfile = "pubkey.txt";
75
static const char *seckeyfile = "seckey.txt";
76
77
77
bool debug = false;
78
static const char *keydir = "/conf/conf.d/mandos";
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
78
83
/* Used for passing in values through the Avahi callback functions */
79
/* Used for passing in values through all the callback functions */
84
80
typedef struct {
85
81
AvahiSimplePoll *simple_poll;
86
82
AvahiServer *server;
87
83
gnutls_certificate_credentials_t cred;
88
84
unsigned int dh_bits;
89
gnutls_dh_params_t dh_params;
90
85
const char *priority;
91
86
} mandos_context;
92
87
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,
88
static ssize_t pgp_packet_decrypt (char *packet, size_t packet_size,
89
char **new_packet,
117
90
const char *homedir){
118
91
gpgme_data_t dh_crypto, dh_plain;
119
92
gpgme_ctx_t ctx;
120
93
gpgme_error_t rc;
121
94
ssize_t ret;
122
size_t plaintext_capacity = 0;
123
ssize_t plaintext_length = 0;
95
ssize_t new_packet_capacity = 0;
96
ssize_t new_packet_length = 0;
124
97
gpgme_engine_info_t engine_info;
125
98
126
99
if (debug){
127
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
100
fprintf(stderr, "Trying to decrypt OpenPGP packet\n");
128
101
}
129
102
130
103
/* Init GPGME */
136
109
return -1;
137
110
}
138
111
139
/* Set GPGME home directory for the OpenPGP engine only */
112
/* Set GPGME home directory */
140
113
rc = gpgme_get_engine_info (&engine_info);
141
114
if (rc != GPG_ERR_NO_ERROR){
142
115
fprintf(stderr, "bad gpgme_get_engine_info: %s: %s\n",
152
125
engine_info = engine_info->next;
153
126
}
154
127
if(engine_info == NULL){
155
fprintf(stderr, "Could not set GPGME home dir to %s\n", homedir);
128
fprintf(stderr, "Could not set home dir to %s\n", homedir);
156
129
return -1;
157
130
}
158
131
159
/* Create new GPGME data buffer from memory cryptotext */
160
rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,
161
0);
132
/* Create new GPGME data buffer from packet buffer */
133
rc = gpgme_data_new_from_mem(&dh_crypto, packet, packet_size, 0);
162
134
if (rc != GPG_ERR_NO_ERROR){
163
135
fprintf(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
164
136
gpgme_strsource(rc), gpgme_strerror(rc));
170
142
if (rc != GPG_ERR_NO_ERROR){
171
143
fprintf(stderr, "bad gpgme_data_new: %s: %s\n",
172
144
gpgme_strsource(rc), gpgme_strerror(rc));
173
gpgme_data_release(dh_crypto);
174
145
return -1;
175
146
}
176
147
179
150
if (rc != GPG_ERR_NO_ERROR){
180
151
fprintf(stderr, "bad gpgme_new: %s: %s\n",
181
152
gpgme_strsource(rc), gpgme_strerror(rc));
182
plaintext_length = -1;
183
goto decrypt_end;
153
return -1;
184
154
}
185
155
186
/* Decrypt data from the cryptotext data buffer to the plaintext
187
data buffer */
156
/* Decrypt data from the FILE pointer to the plaintext data
157
buffer */
188
158
rc = gpgme_op_decrypt(ctx, dh_crypto, dh_plain);
189
159
if (rc != GPG_ERR_NO_ERROR){
190
160
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
191
161
gpgme_strsource(rc), gpgme_strerror(rc));
192
plaintext_length = -1;
193
goto decrypt_end;
162
return -1;
194
163
}
195
164
196
165
if(debug){
197
fprintf(stderr, "Decryption of OpenPGP data succeeded\n");
166
fprintf(stderr, "Decryption of OpenPGP packet succeeded\n");
198
167
}
199
168
200
169
if (debug){
201
170
gpgme_decrypt_result_t result;
202
171
result = gpgme_op_decrypt_result(ctx);
226
195
}
227
196
}
228
197
198
/* Delete the GPGME FILE pointer cryptotext data buffer */
199
gpgme_data_release(dh_crypto);
200
229
201
/* Seek back to the beginning of the GPGME plaintext data buffer */
230
202
if (gpgme_data_seek(dh_plain, (off_t) 0, SEEK_SET) == -1){
231
203
perror("pgpme_data_seek");
232
plaintext_length = -1;
233
goto decrypt_end;
234
204
}
235
205
236
*plaintext = NULL;
206
*new_packet = 0;
237
207
while(true){
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;
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;
245
217
}
246
218
247
ret = gpgme_data_read(dh_plain, *plaintext + plaintext_length,
219
ret = gpgme_data_read(dh_plain, *new_packet + new_packet_length,
248
220
BUFFER_SIZE);
249
221
/* Print the data, if any */
250
222
if (ret == 0){
251
/* EOF */
252
223
break;
253
224
}
254
225
if(ret < 0){
255
226
perror("gpgme_data_read");
256
plaintext_length = -1;
257
goto decrypt_end;
227
return -1;
258
228
}
259
plaintext_length += ret;
229
new_packet_length += ret;
260
230
}
261
231
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);
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
/* } */
274
239
275
240
/* Delete the GPGME plaintext data buffer */
276
241
gpgme_data_release(dh_plain);
277
return plaintext_length;
242
return new_packet_length;
278
243
}
279
244
280
245
static const char * safer_gnutls_strerror (int value) {
284
249
return ret;
285
250
}
286
251
287
/* GnuTLS log function callback */
288
252
static void debuggnutls(__attribute__((unused)) int level,
289
253
const char* string){
290
fprintf(stderr, "GnuTLS: %s", string);
254
fprintf(stderr, "%s", string);
291
255
}
292
256
293
static int init_gnutls_global(mandos_context *mc,
294
const char *pubkeyfile,
295
const char *seckeyfile){
257
static int initgnutls(mandos_context *mc, gnutls_session_t *session,
258
gnutls_dh_params_t *dh_params){
259
const char *err;
296
260
int ret;
297
261
298
262
if(debug){
301
265
302
266
if ((ret = gnutls_global_init ())
303
267
!= GNUTLS_E_SUCCESS) {
304
fprintf (stderr, "GnuTLS global_init: %s\n",
305
safer_gnutls_strerror(ret));
268
fprintf (stderr, "global_init: %s\n", safer_gnutls_strerror(ret));
306
269
return -1;
307
270
}
308
271
309
272
if (debug){
310
/* "Use a log level over 10 to enable all debugging options."
311
* - GnuTLS manual
312
*/
313
273
gnutls_global_set_log_level(11);
314
274
gnutls_global_set_log_function(debuggnutls);
315
275
}
316
276
317
/* OpenPGP credentials */
277
/* openpgp credentials */
318
278
if ((ret = gnutls_certificate_allocate_credentials (&mc->cred))
319
279
!= GNUTLS_E_SUCCESS) {
320
fprintf (stderr, "GnuTLS memory error: %s\n",
280
fprintf (stderr, "memory error: %s\n",
321
281
safer_gnutls_strerror(ret));
322
gnutls_global_deinit ();
323
282
return -1;
324
283
}
325
284
332
291
ret = gnutls_certificate_set_openpgp_key_file
333
292
(mc->cred, pubkeyfile, seckeyfile, GNUTLS_OPENPGP_FMT_BASE64);
334
293
if (ret != GNUTLS_E_SUCCESS) {
335
fprintf(stderr,
336
"Error[%d] while reading the OpenPGP key pair ('%s',"
337
" '%s')\n", ret, pubkeyfile, seckeyfile);
338
fprintf(stdout, "The GnuTLS error is: %s\n",
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",
339
299
safer_gnutls_strerror(ret));
340
goto globalfail;
341
}
342
343
/* GnuTLS server initialization */
344
ret = gnutls_dh_params_init(&mc->dh_params);
345
if (ret != GNUTLS_E_SUCCESS) {
346
fprintf (stderr, "Error in GnuTLS DH parameter initialization:"
347
" %s\n", safer_gnutls_strerror(ret));
348
goto globalfail;
349
}
350
ret = gnutls_dh_params_generate2(mc->dh_params, mc->dh_bits);
351
if (ret != GNUTLS_E_SUCCESS) {
352
fprintf (stderr, "Error in GnuTLS prime generation: %s\n",
353
safer_gnutls_strerror(ret));
354
goto globalfail;
355
}
356
357
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
358
359
return 0;
360
361
globalfail:
362
363
gnutls_certificate_free_credentials (mc->cred);
364
gnutls_global_deinit ();
365
return -1;
366
367
}
368
369
static int init_gnutls_session(mandos_context *mc,
370
gnutls_session_t *session){
371
int ret;
372
/* GnuTLS session creation */
373
ret = gnutls_init(session, GNUTLS_SERVER);
374
if (ret != GNUTLS_E_SUCCESS){
300
return -1;
301
}
302
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){
375
323
fprintf(stderr, "Error in GnuTLS session initialization: %s\n",
376
324
safer_gnutls_strerror(ret));
377
325
}
378
326
379
{
380
const char *err;
381
ret = gnutls_priority_set_direct(*session, mc->priority, &err);
382
if (ret != GNUTLS_E_SUCCESS) {
383
fprintf(stderr, "Syntax error at: %s\n", err);
384
fprintf(stderr, "GnuTLS error: %s\n",
385
safer_gnutls_strerror(ret));
386
gnutls_deinit (*session);
387
return -1;
388
}
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;
389
333
}
390
334
391
ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,
392
mc->cred);
393
if (ret != GNUTLS_E_SUCCESS) {
394
fprintf(stderr, "Error setting GnuTLS credentials: %s\n",
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",
395
339
safer_gnutls_strerror(ret));
396
gnutls_deinit (*session);
397
340
return -1;
398
341
}
399
342
406
349
return 0;
407
350
}
408
351
409
/* Avahi log function callback */
410
352
static void empty_log(__attribute__((unused)) AvahiLogLevel level,
411
353
__attribute__((unused)) const char *txt){}
412
354
413
/* Called when a Mandos server is found */
414
355
static int start_mandos_communication(const char *ip, uint16_t port,
415
356
AvahiIfIndex if_index,
416
357
mandos_context *mc){
417
358
int ret, tcp_sd;
418
union { struct sockaddr in; struct sockaddr_in6 in6; } to;
359
struct sockaddr_in6 to;
419
360
char *buffer = NULL;
420
361
char *decrypted_buffer;
421
362
size_t buffer_length = 0;
422
363
size_t buffer_capacity = 0;
423
364
ssize_t decrypted_buffer_size;
424
size_t written;
365
size_t written = 0;
425
366
int retval = 0;
426
367
char interface[IF_NAMESIZE];
427
368
gnutls_session_t session;
428
429
ret = init_gnutls_session (mc, &session);
430
if (ret != 0){
431
return -1;
432
}
369
gnutls_dh_params_t dh_params;
433
370
434
371
if(debug){
435
372
fprintf(stderr, "Setting up a tcp connection to %s, port %d\n",
451
388
}
452
389
453
390
memset(&to,0,sizeof(to)); /* Spurious warning */
454
to.in6.sin6_family = AF_INET6;
455
/* It would be nice to have a way to detect if we were passed an
456
IPv4 address here. Now we assume an IPv6 address. */
457
ret = inet_pton(AF_INET6, ip, &to.in6.sin6_addr);
391
to.sin6_family = AF_INET6;
392
ret = inet_pton(AF_INET6, ip, &to.sin6_addr);
458
393
if (ret < 0 ){
459
394
perror("inet_pton");
460
395
return -1;
463
398
fprintf(stderr, "Bad address: %s\n", ip);
464
399
return -1;
465
400
}
466
to.in6.sin6_port = htons(port); /* Spurious warning */
401
to.sin6_port = htons(port); /* Spurious warning */
467
402
468
to.in6.sin6_scope_id = (uint32_t)if_index;
403
to.sin6_scope_id = (uint32_t)if_index;
469
404
470
405
if(debug){
471
406
fprintf(stderr, "Connection to: %s, port %d\n", ip, port);
472
407
char addrstr[INET6_ADDRSTRLEN] = "";
473
if(inet_ntop(to.in6.sin6_family, &(to.in6.sin6_addr), addrstr,
408
if(inet_ntop(to.sin6_family, &(to.sin6_addr), addrstr,
474
409
sizeof(addrstr)) == NULL){
475
410
perror("inet_ntop");
476
411
} else {
480
415
}
481
416
}
482
417
483
ret = connect(tcp_sd, &to.in, sizeof(to));
418
ret = connect(tcp_sd, (struct sockaddr *) &to, sizeof(to));
484
419
if (ret < 0){
485
420
perror("connect");
486
421
return -1;
487
422
}
488
489
const char *out = mandos_protocol_version;
490
written = 0;
491
while (true){
492
size_t out_size = strlen(out);
493
ret = TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
494
out_size - written));
495
if (ret == -1){
496
perror("write");
497
retval = -1;
498
goto mandos_end;
499
}
500
written += (size_t)ret;
501
if(written < out_size){
502
continue;
503
} else {
504
if (out == mandos_protocol_version){
505
written = 0;
506
out = "\r\n";
507
} else {
508
break;
509
}
510
}
423
424
ret = initgnutls (mc, &session, &dh_params);
425
if (ret != 0){
426
retval = -1;
427
return -1;
511
428
}
512
429
430
gnutls_transport_set_ptr (session, (gnutls_transport_ptr_t) tcp_sd);
431
513
432
if(debug){
514
433
fprintf(stderr, "Establishing TLS session with %s\n", ip);
515
434
}
516
435
517
gnutls_transport_set_ptr (session, (gnutls_transport_ptr_t) tcp_sd);
518
519
436
ret = gnutls_handshake (session);
520
437
521
438
if (ret != GNUTLS_E_SUCCESS){
522
439
if(debug){
523
fprintf(stderr, "*** GnuTLS Handshake failed ***\n");
440
fprintf(stderr, "\n*** Handshake failed ***\n");
524
441
gnutls_perror (ret);
525
442
}
526
443
retval = -1;
527
goto mandos_end;
444
goto exit;
528
445
}
529
446
530
/* Read OpenPGP packet that contains the wanted password */
447
//Retrieve OpenPGP packet that contains the wanted password
531
448
532
449
if(debug){
533
450
fprintf(stderr, "Retrieving pgp encrypted password from %s\n",
535
452
}
536
453
537
454
while(true){
538
buffer_capacity = adjustbuffer(&buffer, buffer_length,
539
buffer_capacity);
540
if (buffer_capacity == 0){
541
perror("adjustbuffer");
542
retval = -1;
543
goto mandos_end;
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;
544
462
}
545
463
546
464
ret = gnutls_record_recv(session, buffer+buffer_length,
556
474
case GNUTLS_E_REHANDSHAKE:
557
475
ret = gnutls_handshake (session);
558
476
if (ret < 0){
559
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
477
fprintf(stderr, "\n*** Handshake failed ***\n");
560
478
gnutls_perror (ret);
561
479
retval = -1;
562
goto mandos_end;
480
goto exit;
563
481
}
564
482
break;
565
483
default:
566
484
fprintf(stderr, "Unknown error while reading data from"
567
" encrypted session with Mandos server\n");
485
" encrypted session with mandos server\n");
568
486
retval = -1;
569
487
gnutls_bye (session, GNUTLS_SHUT_RDWR);
570
goto mandos_end;
488
goto exit;
571
489
}
572
490
} else {
573
491
buffer_length += (size_t) ret;
574
492
}
575
493
}
576
494
577
if(debug){
578
fprintf(stderr, "Closing TLS session\n");
579
}
580
581
gnutls_bye (session, GNUTLS_SHUT_RDWR);
582
583
495
if (buffer_length > 0){
584
496
decrypted_buffer_size = pgp_packet_decrypt(buffer,
585
497
buffer_length,
586
498
&decrypted_buffer,
587
499
keydir);
588
500
if (decrypted_buffer_size >= 0){
589
written = 0;
590
501
while(written < (size_t) decrypted_buffer_size){
591
502
ret = (int)fwrite (decrypted_buffer + written, 1,
592
503
(size_t)decrypted_buffer_size - written,
606
517
retval = -1;
607
518
}
608
519
}
609
610
/* Shutdown procedure */
611
612
mandos_end:
520
521
//shutdown procedure
522
523
if(debug){
524
fprintf(stderr, "Closing TLS session\n");
525
}
526
613
527
free(buffer);
528
gnutls_bye (session, GNUTLS_SHUT_RDWR);
529
exit:
614
530
close(tcp_sd);
615
531
gnutls_deinit (session);
532
gnutls_certificate_free_credentials (mc->cred);
533
gnutls_global_deinit ();
616
534
return retval;
617
535
}
618
536
619
static void resolve_callback(AvahiSServiceResolver *r,
620
AvahiIfIndex interface,
621
AVAHI_GCC_UNUSED AvahiProtocol protocol,
622
AvahiResolverEvent event,
623
const char *name,
624
const char *type,
625
const char *domain,
626
const char *host_name,
627
const AvahiAddress *address,
628
uint16_t port,
629
AVAHI_GCC_UNUSED AvahiStringList *txt,
630
AVAHI_GCC_UNUSED AvahiLookupResultFlags
631
flags,
632
void* userdata) {
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) {
633
550
mandos_context *mc = userdata;
634
551
assert(r); /* Spurious warning */
635
552
639
556
switch (event) {
640
557
default:
641
558
case AVAHI_RESOLVER_FAILURE:
642
fprintf(stderr, "(Avahi Resolver) Failed to resolve service '%s'"
643
" of type '%s' in domain '%s': %s\n", name, type, domain,
559
fprintf(stderr, "(Resolver) Failed to resolve service '%s' of"
560
" type '%s' in domain '%s': %s\n", name, type, domain,
644
561
avahi_strerror(avahi_server_errno(mc->server)));
645
562
break;
646
563
649
566
char ip[AVAHI_ADDRESS_STR_MAX];
650
567
avahi_address_snprint(ip, sizeof(ip), address);
651
568
if(debug){
652
fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %d) on"
653
" port %d\n", name, host_name, ip, interface, port);
569
fprintf(stderr, "Mandos server \"%s\" found on %s (%s) on"
570
" port %d\n", name, host_name, ip, port);
654
571
}
655
572
int ret = start_mandos_communication(ip, port, interface, mc);
656
573
if (ret == 0){
668
585
const char *name,
669
586
const char *type,
670
587
const char *domain,
671
AVAHI_GCC_UNUSED AvahiLookupResultFlags
672
flags,
588
AVAHI_GCC_UNUSED AvahiLookupResultFlags flags,
673
589
void* userdata) {
674
590
mandos_context *mc = userdata;
675
591
assert(b); /* Spurious warning */
681
597
default:
682
598
case AVAHI_BROWSER_FAILURE:
683
599
684
fprintf(stderr, "(Avahi browser) %s\n",
600
fprintf(stderr, "(Browser) %s\n",
685
601
avahi_strerror(avahi_server_errno(mc->server)));
686
602
avahi_simple_poll_quit(mc->simple_poll);
687
603
return;
688
604
689
605
case AVAHI_BROWSER_NEW:
690
/* We ignore the returned Avahi resolver object. In the callback
691
function we free it. If the Avahi server is terminated before
692
the callback function is called the Avahi server will free the
693
resolver for us. */
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. */
694
610
695
if (!(avahi_s_service_resolver_new(mc->server, interface,
696
protocol, name, type, domain,
611
if (!(avahi_s_service_resolver_new(mc->server, interface, protocol, name,
612
type, domain,
697
613
AVAHI_PROTO_INET6, 0,
698
614
resolve_callback, mc)))
699
fprintf(stderr, "Avahi: Failed to resolve service '%s': %s\n",
700
name, avahi_strerror(avahi_server_errno(mc->server)));
615
fprintf(stderr, "Failed to resolve service '%s': %s\n", name,
616
avahi_strerror(avahi_server_errno(mc->server)));
701
617
break;
702
618
703
619
case AVAHI_BROWSER_REMOVE:
705
621
706
622
case AVAHI_BROWSER_ALL_FOR_NOW:
707
623
case AVAHI_BROWSER_CACHE_EXHAUSTED:
708
if(debug){
709
fprintf(stderr, "No Mandos server found, still searching...\n");
710
}
711
624
break;
712
625
}
713
626
}
733
646
}
734
647
735
648
736
int main(int argc, char *argv[]){
649
int main(AVAHI_GCC_UNUSED int argc, AVAHI_GCC_UNUSED char*argv[]) {
650
AvahiServerConfig config;
737
651
AvahiSServiceBrowser *sb = NULL;
738
652
int error;
739
653
int ret;
740
int exitcode = EXIT_SUCCESS;
654
int debug_int;
655
int returncode = EXIT_SUCCESS;
741
656
const char *interface = "eth0";
742
657
struct ifreq network;
743
658
int sd;
744
uid_t uid;
745
gid_t gid;
746
659
char *connect_to = NULL;
747
660
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
748
const char *pubkeyfile = "pubkey.txt";
749
const char *seckeyfile = "seckey.txt";
750
661
mandos_context mc = { .simple_poll = NULL, .server = NULL,
751
662
.dh_bits = 1024, .priority = "SECURE256"};
752
bool gnutls_initalized = false;
753
663
754
{
755
struct argp_option options[] = {
756
{ .name = "debug", .key = 128,
757
.doc = "Debug mode", .group = 3 },
758
{ .name = "connect", .key = 'c',
759
.arg = "IP",
760
.doc = "Connect directly to a sepcified mandos server",
761
.group = 1 },
762
{ .name = "interface", .key = 'i',
763
.arg = "INTERFACE",
764
.doc = "Interface that Avahi will conntect through",
765
.group = 1 },
766
{ .name = "keydir", .key = 'd',
767
.arg = "KEYDIR",
768
.doc = "Directory where the openpgp keyring is",
769
.group = 1 },
770
{ .name = "seckey", .key = 's',
771
.arg = "SECKEY",
772
.doc = "Secret openpgp key for gnutls authentication",
773
.group = 1 },
774
{ .name = "pubkey", .key = 'p',
775
.arg = "PUBKEY",
776
.doc = "Public openpgp key for gnutls authentication",
777
.group = 2 },
778
{ .name = "dh-bits", .key = 129,
779
.arg = "BITS",
780
.doc = "dh-bits to use in gnutls communication",
781
.group = 2 },
782
{ .name = "priority", .key = 130,
783
.arg = "PRIORITY",
784
.doc = "GNUTLS priority", .group = 1 },
785
{ .name = NULL }
786
};
787
788
789
error_t parse_opt (int key, char *arg,
790
struct argp_state *state) {
791
/* Get the INPUT argument from `argp_parse', which we know is
792
a pointer to our plugin list pointer. */
793
switch (key) {
794
case 128:
795
debug = true;
796
break;
797
case 'c':
798
connect_to = arg;
799
break;
800
case 'i':
801
interface = arg;
802
break;
803
case 'd':
804
keydir = arg;
805
break;
806
case 's':
807
seckeyfile = arg;
808
break;
809
case 'p':
810
pubkeyfile = arg;
811
break;
812
case 129:
813
errno = 0;
814
mc.dh_bits = (unsigned int) strtol(arg, NULL, 10);
815
if (errno){
816
perror("strtol");
817
exit(EXIT_FAILURE);
818
}
819
break;
820
case 130:
821
mc.priority = arg;
822
break;
823
case ARGP_KEY_ARG:
824
argp_usage (state);
825
break;
826
case ARGP_KEY_END:
827
break;
828
default:
829
return ARGP_ERR_UNKNOWN;
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);
830
709
}
831
return 0;
710
break;
711
case 'P':
712
mc.priority = optarg;
713
break;
714
case '?':
715
default:
716
exit(EXIT_FAILURE);
832
717
}
833
834
struct argp argp = { .options = options, .parser = parse_opt,
835
.args_doc = "",
836
.doc = "Mandos client -- Get and decrypt"
837
" passwords from mandos server" };
838
argp_parse (&argp, argc, argv, 0, 0, NULL);
839
718
}
840
719
debug = debug_int ? true : false;
720
841
721
pubkeyfile = combinepath(keydir, pubkeyfile);
842
722
if (pubkeyfile == NULL){
843
723
perror("combinepath");
844
exitcode = EXIT_FAILURE;
845
goto end;
724
returncode = EXIT_FAILURE;
725
goto exit;
846
726
}
847
727
848
728
seckeyfile = combinepath(keydir, seckeyfile);
849
729
if (seckeyfile == NULL){
850
730
perror("combinepath");
851
goto end;
852
}
853
854
ret = init_gnutls_global(&mc, pubkeyfile, seckeyfile);
855
if (ret == -1){
856
fprintf(stderr, "init_gnutls_global\n");
857
goto end;
858
} else {
859
gnutls_initalized = true;
860
}
861
862
uid = getuid();
863
gid = getgid();
864
865
ret = setuid(uid);
866
if (ret == -1){
867
perror("setuid");
868
}
869
870
setgid(gid);
871
if (ret == -1){
872
perror("setgid");
731
goto exit;
873
732
}
874
733
875
734
if_index = (AvahiIfIndex) if_nametoindex(interface);
884
743
char *address = strrchr(connect_to, ':');
885
744
if(address == NULL){
886
745
fprintf(stderr, "No colon in address\n");
887
exitcode = EXIT_FAILURE;
888
goto end;
746
exit(EXIT_FAILURE);
889
747
}
890
748
errno = 0;
891
749
uint16_t port = (uint16_t) strtol(address+1, NULL, 10);
892
750
if(errno){
893
751
perror("Bad port number");
894
exitcode = EXIT_FAILURE;
895
goto end;
752
exit(EXIT_FAILURE);
896
753
}
897
754
*address = '\0';
898
755
address = connect_to;
899
756
ret = start_mandos_communication(address, port, if_index, &mc);
900
757
if(ret < 0){
901
exitcode = EXIT_FAILURE;
758
exit(EXIT_FAILURE);
902
759
} else {
903
exitcode = EXIT_SUCCESS;
760
exit(EXIT_SUCCESS);
904
761
}
905
goto end;
906
762
}
907
763
908
/* If the interface is down, bring it up */
909
{
910
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
911
if(sd < 0) {
912
perror("socket");
913
exitcode = EXIT_FAILURE;
914
goto end;
915
}
916
strcpy(network.ifr_name, interface); /* Spurious warning */
917
ret = ioctl(sd, SIOCGIFFLAGS, &network);
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);
918
781
if(ret == -1){
919
perror("ioctl SIOCGIFFLAGS");
920
exitcode = EXIT_FAILURE;
921
goto end;
922
}
923
if((network.ifr_flags & IFF_UP) == 0){
924
network.ifr_flags |= IFF_UP;
925
ret = ioctl(sd, SIOCSIFFLAGS, &network);
926
if(ret == -1){
927
perror("ioctl SIOCSIFFLAGS");
928
exitcode = EXIT_FAILURE;
929
goto end;
930
}
931
}
932
close(sd);
782
perror("ioctl SIOCSIFFLAGS");
783
returncode = EXIT_FAILURE;
784
goto exit;
785
}
933
786
}
787
close(sd);
934
788
935
789
if (not debug){
936
790
avahi_set_log_function(empty_log);
937
791
}
938
792
939
/* Initialize the pseudo-RNG for Avahi */
793
/* Initialize the psuedo-RNG */
940
794
srand((unsigned int) time(NULL));
941
942
/* Allocate main Avahi loop object */
943
mc.simple_poll = avahi_simple_poll_new();
944
if (mc.simple_poll == NULL) {
945
fprintf(stderr, "Avahi: Failed to create simple poll"
946
" object.\n");
947
exitcode = EXIT_FAILURE;
948
goto end;
949
}
950
951
{
952
AvahiServerConfig config;
953
/* Do not publish any local Zeroconf records */
954
avahi_server_config_init(&config);
955
config.publish_hinfo = 0;
956
config.publish_addresses = 0;
957
config.publish_workstation = 0;
958
config.publish_domain = 0;
959
960
/* Allocate a new server */
961
mc.server = avahi_server_new(avahi_simple_poll_get
962
(mc.simple_poll), &config, NULL,
963
NULL, &error);
964
965
/* Free the Avahi configuration data */
966
avahi_server_config_free(&config);
967
}
968
969
/* Check if creating the Avahi server object succeeded */
970
if (mc.server == NULL) {
971
fprintf(stderr, "Failed to create Avahi server: %s\n",
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",
972
820
avahi_strerror(error));
973
exitcode = EXIT_FAILURE;
974
goto end;
821
returncode = EXIT_FAILURE;
822
goto exit;
975
823
}
976
824
977
/* Create the Avahi service browser */
825
/* Create the service browser */
978
826
sb = avahi_s_service_browser_new(mc.server, if_index,
979
827
AVAHI_PROTO_INET6,
980
828
"_mandos._tcp", NULL, 0,
981
829
browse_callback, &mc);
982
if (sb == NULL) {
830
if (!sb) {
983
831
fprintf(stderr, "Failed to create service browser: %s\n",
984
832
avahi_strerror(avahi_server_errno(mc.server)));
985
exitcode = EXIT_FAILURE;
986
goto end;
833
returncode = EXIT_FAILURE;
834
goto exit;
987
835
}
988
836
989
837
/* Run the main loop */
990
838
991
839
if (debug){
992
fprintf(stderr, "Starting Avahi loop search\n");
840
fprintf(stderr, "Starting avahi loop search\n");
993
841
}
994
842
995
843
avahi_simple_poll_loop(mc.simple_poll);
996
844
997
end:
845
exit:
998
846
999
847
if (debug){
1000
848
fprintf(stderr, "%s exiting\n", argv[0]);
1001
849
}
1002
850
1003
851
/* Cleanup things */
1004
if (sb != NULL)
852
if (sb)
1005
853
avahi_s_service_browser_free(sb);
1006
854
1007
if (mc.server != NULL)
855
if (mc.server)
1008
856
avahi_server_free(mc.server);
1009
857
1010
if (mc.simple_poll != NULL)
858
if (mc.simple_poll)
1011
859
avahi_simple_poll_free(mc.simple_poll);
1012
860
free(pubkeyfile);
1013
861
free(seckeyfile);
1014
1015
if (gnutls_initalized){
1016
gnutls_certificate_free_credentials (mc.cred);
1017
gnutls_global_deinit ();
1018
}
1019
862
1020
return exitcode;
863
return returncode;
1021
864
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0