To get this branch, use:
bzr branch
http://bzr.recompile.se/loggerhead/mandos/release
« back to all changes in this revision
Viewing changes to plugins.d/password-request.c
- browse files at revision 168
- compare with another revision
- download diff
- download tarball
- view history from revision 168
- Committer: Teddy Hogeborn
- Date: 2008-09-06 15:34:21 UTC
- Revision ID: teddy@fukt.bsnet.se-20080906153421-605ydhwyo404krh9
* initramfs-tools-hook: Use long options where available. Use only
one "test" invocation instead of several.
* mandos-keygen: Use only one "test" invocation instead of several.
Use long options where available. Strip newline from
entered password.
* plugin-runner.c (print_out_password): Do not strip trailing newline.
(fallback): Strip trailing newline from getpass().
* plugin-runner.xml (PLUGINS): Plugins should not print trailing
newlines.
* plugins.d/password-prompt.c (main): Strip trailing newline.
* plugins.d/password-request.c (main): Bug fix: Read "pubkey.txt", not
"pupkey.txt".
one "test" invocation instead of several.
* mandos-keygen: Use only one "test" invocation instead of several.
Use long options where available. Strip newline from
entered password.
* plugin-runner.c (print_out_password): Do not strip trailing newline.
(fallback): Strip trailing newline from getpass().
* plugin-runner.xml (PLUGINS): Plugins should not print trailing
newlines.
* plugins.d/password-prompt.c (main): Strip trailing newline.
* plugins.d/password-request.c (main): Bug fix: Read "pubkey.txt", not
"pupkey.txt".
- files added:
- plugins.d/usplash
- files removed:
- .bzr-builddeb
- debian
- debian/po
- files renamed:
- plugins.d/mandos-client.c => plugins.d/password-request.c
- plugins.d/mandos-client.xml => plugins.d/password-request.xml
- files modified:
- .bzrignore
added
removed
plugins.d/password-request.c
1
1
/* -*- coding: utf-8 -*- */
2
2
/*
3
* Mandos-client - get and decrypt data from a Mandos server
3
* Mandos client - get and decrypt data from a Mandos server
4
4
*
5
5
* This program is partly derived from an example program for an Avahi
6
6
* service browser, downloaded from
9
9
* "browse_callback", and parts of "main".
10
10
*
11
11
* Everything else is
12
* Copyright © 2008,2009 Teddy Hogeborn
13
* Copyright © 2008,2009 Björn Påhlsson
12
* Copyright © 2007-2008 Teddy Hogeborn & Björn Påhlsson
14
13
*
15
14
* This program is free software: you can redistribute it and/or
16
15
* modify it under the terms of the GNU General Public License as
36
35
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), asprintf() */
37
36
38
37
#include <stdio.h> /* fprintf(), stderr, fwrite(),
39
stdout, ferror(), sscanf(),
40
remove() */
38
stdout, ferror() */
41
39
#include <stdint.h> /* uint16_t, uint32_t */
42
40
#include <stddef.h> /* NULL, size_t, ssize_t */
43
41
#include <stdlib.h> /* free(), EXIT_SUCCESS, EXIT_FAILURE,
49
47
#include <sys/types.h> /* socket(), inet_pton(), sockaddr,
50
48
sockaddr_in6, PF_INET6,
51
49
SOCK_STREAM, INET6_ADDRSTRLEN,
52
uid_t, gid_t, open(), opendir(),
53
DIR */
50
uid_t, gid_t, open(), opendir(), DIR */
54
51
#include <sys/stat.h> /* open() */
55
52
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
56
53
struct in6_addr, inet_pton(),
57
54
connect() */
58
55
#include <fcntl.h> /* open() */
59
#include <dirent.h> /* opendir(), struct dirent, readdir()
60
*/
61
#include <inttypes.h> /* PRIu16, intmax_t, SCNdMAX */
56
#include <dirent.h> /* opendir(), struct dirent, readdir() */
57
#include <inttypes.h> /* PRIu16 */
62
58
#include <assert.h> /* assert() */
63
59
#include <errno.h> /* perror(), errno */
64
#include <time.h> /* nanosleep(), time() */
60
#include <time.h> /* time() */
65
61
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
66
62
SIOCSIFFLAGS, if_indextoname(),
67
63
if_nametoindex(), IF_NAMESIZE */
70
66
getuid(), getgid(), setuid(),
71
67
setgid() */
72
68
#include <arpa/inet.h> /* inet_pton(), htons */
73
#include <iso646.h> /* not, and, or */
69
#include <iso646.h> /* not, and */
74
70
#include <argp.h> /* struct argp_option, error_t, struct
75
71
argp_state, struct argp,
76
72
argp_parse(), ARGP_KEY_ARG,
77
73
ARGP_KEY_END, ARGP_ERR_UNKNOWN */
78
#include <sys/klog.h> /* klogctl() */
79
74
80
75
/* Avahi */
81
76
/* All Avahi types, constants and functions
94
89
gnutls_*
95
90
init_gnutls_session(),
96
91
GNUTLS_* */
97
#include <gnutls/openpgp.h>
98
/* gnutls_certificate_set_openpgp_key_file(),
92
#include <gnutls/openpgp.h> /* gnutls_certificate_set_openpgp_key_file(),
99
93
GNUTLS_OPENPGP_FMT_BASE64 */
100
94
101
95
/* GPGME */
107
101
108
102
#define BUFFER_SIZE 256
109
103
104
/*
105
#define PATHDIR "/conf/conf.d/mandos"
106
*/
107
110
108
#define PATHDIR "/conf/conf.d/mandos"
111
109
#define SECKEY "seckey.txt"
112
110
#define PUBKEY "pubkey.txt"
113
111
114
112
bool debug = false;
115
113
static const char mandos_protocol_version[] = "1";
116
const char *argp_program_version = "mandos-client " VERSION;
114
const char *argp_program_version = "password-request 1.0";
117
115
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
118
116
119
117
/* Used for passing in values through the Avahi callback functions */
134
132
*/
135
133
size_t adjustbuffer(char **buffer, size_t buffer_length,
136
134
size_t buffer_capacity){
137
if(buffer_length + BUFFER_SIZE > buffer_capacity){
135
if (buffer_length + BUFFER_SIZE > buffer_capacity){
138
136
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
139
if(buffer == NULL){
137
if (buffer == NULL){
140
138
return 0;
141
139
}
142
140
buffer_capacity += BUFFER_SIZE;
155
153
156
154
157
155
/*
158
* Helper function to insert pub and seckey to the engine keyring.
156
* Helper function to insert pub and seckey to the enigne keyring.
159
157
*/
160
158
bool import_key(const char *filename){
161
159
int fd;
162
160
gpgme_data_t pgp_data;
163
161
164
fd = (int)TEMP_FAILURE_RETRY(open(filename, O_RDONLY));
162
fd = TEMP_FAILURE_RETRY(open(filename, O_RDONLY));
165
163
if(fd == -1){
166
164
perror("open");
167
165
return false;
168
166
}
169
167
170
168
rc = gpgme_data_new_from_fd(&pgp_data, fd);
171
if(rc != GPG_ERR_NO_ERROR){
169
if (rc != GPG_ERR_NO_ERROR){
172
170
fprintf(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
173
171
gpgme_strsource(rc), gpgme_strerror(rc));
174
172
return false;
175
173
}
176
174
177
175
rc = gpgme_op_import(mc->ctx, pgp_data);
178
if(rc != GPG_ERR_NO_ERROR){
176
if (rc != GPG_ERR_NO_ERROR){
179
177
fprintf(stderr, "bad gpgme_op_import: %s: %s\n",
180
178
gpgme_strsource(rc), gpgme_strerror(rc));
181
179
return false;
182
180
}
183
181
184
ret = (int)TEMP_FAILURE_RETRY(close(fd));
182
ret = TEMP_FAILURE_RETRY(close(fd));
185
183
if(ret == -1){
186
184
perror("close");
187
185
}
189
187
return true;
190
188
}
191
189
192
if(debug){
190
if (debug){
193
191
fprintf(stderr, "Initialize gpgme\n");
194
192
}
195
193
196
194
/* Init GPGME */
197
195
gpgme_check_version(NULL);
198
196
rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
199
if(rc != GPG_ERR_NO_ERROR){
197
if (rc != GPG_ERR_NO_ERROR){
200
198
fprintf(stderr, "bad gpgme_engine_check_version: %s: %s\n",
201
199
gpgme_strsource(rc), gpgme_strerror(rc));
202
200
return false;
203
201
}
204
202
205
203
/* Set GPGME home directory for the OpenPGP engine only */
206
rc = gpgme_get_engine_info(&engine_info);
207
if(rc != GPG_ERR_NO_ERROR){
204
rc = gpgme_get_engine_info (&engine_info);
205
if (rc != GPG_ERR_NO_ERROR){
208
206
fprintf(stderr, "bad gpgme_get_engine_info: %s: %s\n",
209
207
gpgme_strsource(rc), gpgme_strerror(rc));
210
208
return false;
224
222
225
223
/* Create new GPGME "context" */
226
224
rc = gpgme_new(&(mc->ctx));
227
if(rc != GPG_ERR_NO_ERROR){
225
if (rc != GPG_ERR_NO_ERROR){
228
226
fprintf(stderr, "bad gpgme_new: %s: %s\n",
229
227
gpgme_strsource(rc), gpgme_strerror(rc));
230
228
return false;
231
229
}
232
230
233
if(not import_key(pubkey) or not import_key(seckey)){
231
if (not import_key(pubkey) or not import_key(seckey)){
234
232
return false;
235
233
}
236
234
241
239
* Decrypt OpenPGP data.
242
240
* Returns -1 on error
243
241
*/
244
static ssize_t pgp_packet_decrypt(const mandos_context *mc,
245
const char *cryptotext,
246
size_t crypto_size,
247
char **plaintext){
242
static ssize_t pgp_packet_decrypt (const mandos_context *mc,
243
const char *cryptotext,
244
size_t crypto_size,
245
char **plaintext){
248
246
gpgme_data_t dh_crypto, dh_plain;
249
247
gpgme_error_t rc;
250
248
ssize_t ret;
251
249
size_t plaintext_capacity = 0;
252
250
ssize_t plaintext_length = 0;
253
251
254
if(debug){
252
if (debug){
255
253
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
256
254
}
257
255
258
256
/* Create new GPGME data buffer from memory cryptotext */
259
257
rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,
260
258
0);
261
if(rc != GPG_ERR_NO_ERROR){
259
if (rc != GPG_ERR_NO_ERROR){
262
260
fprintf(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
263
261
gpgme_strsource(rc), gpgme_strerror(rc));
264
262
return -1;
266
264
267
265
/* Create new empty GPGME data buffer for the plaintext */
268
266
rc = gpgme_data_new(&dh_plain);
269
if(rc != GPG_ERR_NO_ERROR){
267
if (rc != GPG_ERR_NO_ERROR){
270
268
fprintf(stderr, "bad gpgme_data_new: %s: %s\n",
271
269
gpgme_strsource(rc), gpgme_strerror(rc));
272
270
gpgme_data_release(dh_crypto);
276
274
/* Decrypt data from the cryptotext data buffer to the plaintext
277
275
data buffer */
278
276
rc = gpgme_op_decrypt(mc->ctx, dh_crypto, dh_plain);
279
if(rc != GPG_ERR_NO_ERROR){
277
if (rc != GPG_ERR_NO_ERROR){
280
278
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
281
279
gpgme_strsource(rc), gpgme_strerror(rc));
282
280
plaintext_length = -1;
283
if(debug){
281
if (debug){
284
282
gpgme_decrypt_result_t result;
285
283
result = gpgme_op_decrypt_result(mc->ctx);
286
if(result == NULL){
284
if (result == NULL){
287
285
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
288
286
} else {
289
287
fprintf(stderr, "Unsupported algorithm: %s\n",
316
314
}
317
315
318
316
/* Seek back to the beginning of the GPGME plaintext data buffer */
319
if(gpgme_data_seek(dh_plain, (off_t)0, SEEK_SET) == -1){
320
perror("gpgme_data_seek");
317
if (gpgme_data_seek(dh_plain, (off_t) 0, SEEK_SET) == -1){
318
perror("pgpme_data_seek");
321
319
plaintext_length = -1;
322
320
goto decrypt_end;
323
321
}
327
325
plaintext_capacity = adjustbuffer(plaintext,
328
326
(size_t)plaintext_length,
329
327
plaintext_capacity);
330
if(plaintext_capacity == 0){
328
if (plaintext_capacity == 0){
331
329
perror("adjustbuffer");
332
330
plaintext_length = -1;
333
331
goto decrypt_end;
336
334
ret = gpgme_data_read(dh_plain, *plaintext + plaintext_length,
337
335
BUFFER_SIZE);
338
336
/* Print the data, if any */
339
if(ret == 0){
337
if (ret == 0){
340
338
/* EOF */
341
339
break;
342
340
}
366
364
return plaintext_length;
367
365
}
368
366
369
static const char * safer_gnutls_strerror(int value) {
370
const char *ret = gnutls_strerror(value); /* Spurious warning from
371
-Wunreachable-code */
372
if(ret == NULL)
367
static const char * safer_gnutls_strerror (int value) {
368
const char *ret = gnutls_strerror (value); /* Spurious warning */
369
if (ret == NULL)
373
370
ret = "(unknown)";
374
371
return ret;
375
372
}
390
387
}
391
388
392
389
ret = gnutls_global_init();
393
if(ret != GNUTLS_E_SUCCESS) {
394
fprintf(stderr, "GnuTLS global_init: %s\n",
395
safer_gnutls_strerror(ret));
390
if (ret != GNUTLS_E_SUCCESS) {
391
fprintf (stderr, "GnuTLS global_init: %s\n",
392
safer_gnutls_strerror(ret));
396
393
return -1;
397
394
}
398
395
399
if(debug){
396
if (debug){
400
397
/* "Use a log level over 10 to enable all debugging options."
401
398
* - GnuTLS manual
402
399
*/
406
403
407
404
/* OpenPGP credentials */
408
405
gnutls_certificate_allocate_credentials(&mc->cred);
409
if(ret != GNUTLS_E_SUCCESS){
410
fprintf(stderr, "GnuTLS memory error: %s\n", /* Spurious warning
411
* from
412
* -Wunreachable-code
413
*/
414
safer_gnutls_strerror(ret));
415
gnutls_global_deinit();
406
if (ret != GNUTLS_E_SUCCESS){
407
fprintf (stderr, "GnuTLS memory error: %s\n", /* Spurious
408
warning */
409
safer_gnutls_strerror(ret));
410
gnutls_global_deinit ();
416
411
return -1;
417
412
}
418
413
425
420
ret = gnutls_certificate_set_openpgp_key_file
426
421
(mc->cred, pubkeyfilename, seckeyfilename,
427
422
GNUTLS_OPENPGP_FMT_BASE64);
428
if(ret != GNUTLS_E_SUCCESS) {
423
if (ret != GNUTLS_E_SUCCESS) {
429
424
fprintf(stderr,
430
425
"Error[%d] while reading the OpenPGP key pair ('%s',"
431
426
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
436
431
437
432
/* GnuTLS server initialization */
438
433
ret = gnutls_dh_params_init(&mc->dh_params);
439
if(ret != GNUTLS_E_SUCCESS) {
440
fprintf(stderr, "Error in GnuTLS DH parameter initialization:"
441
" %s\n", safer_gnutls_strerror(ret));
434
if (ret != GNUTLS_E_SUCCESS) {
435
fprintf (stderr, "Error in GnuTLS DH parameter initialization:"
436
" %s\n", safer_gnutls_strerror(ret));
442
437
goto globalfail;
443
438
}
444
439
ret = gnutls_dh_params_generate2(mc->dh_params, mc->dh_bits);
445
if(ret != GNUTLS_E_SUCCESS) {
446
fprintf(stderr, "Error in GnuTLS prime generation: %s\n",
447
safer_gnutls_strerror(ret));
440
if (ret != GNUTLS_E_SUCCESS) {
441
fprintf (stderr, "Error in GnuTLS prime generation: %s\n",
442
safer_gnutls_strerror(ret));
448
443
goto globalfail;
449
444
}
450
445
456
451
457
452
gnutls_certificate_free_credentials(mc->cred);
458
453
gnutls_global_deinit();
459
gnutls_dh_params_deinit(mc->dh_params);
460
454
return -1;
461
455
}
462
456
465
459
int ret;
466
460
/* GnuTLS session creation */
467
461
ret = gnutls_init(session, GNUTLS_SERVER);
468
if(ret != GNUTLS_E_SUCCESS){
462
if (ret != GNUTLS_E_SUCCESS){
469
463
fprintf(stderr, "Error in GnuTLS session initialization: %s\n",
470
464
safer_gnutls_strerror(ret));
471
465
}
473
467
{
474
468
const char *err;
475
469
ret = gnutls_priority_set_direct(*session, mc->priority, &err);
476
if(ret != GNUTLS_E_SUCCESS) {
470
if (ret != GNUTLS_E_SUCCESS) {
477
471
fprintf(stderr, "Syntax error at: %s\n", err);
478
472
fprintf(stderr, "GnuTLS error: %s\n",
479
473
safer_gnutls_strerror(ret));
480
gnutls_deinit(*session);
474
gnutls_deinit (*session);
481
475
return -1;
482
476
}
483
477
}
484
478
485
479
ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,
486
480
mc->cred);
487
if(ret != GNUTLS_E_SUCCESS) {
481
if (ret != GNUTLS_E_SUCCESS) {
488
482
fprintf(stderr, "Error setting GnuTLS credentials: %s\n",
489
483
safer_gnutls_strerror(ret));
490
gnutls_deinit(*session);
484
gnutls_deinit (*session);
491
485
return -1;
492
486
}
493
487
494
488
/* ignore client certificate if any. */
495
gnutls_certificate_server_set_request(*session,
496
GNUTLS_CERT_IGNORE);
489
gnutls_certificate_server_set_request (*session,
490
GNUTLS_CERT_IGNORE);
497
491
498
gnutls_dh_set_prime_bits(*session, mc->dh_bits);
492
gnutls_dh_set_prime_bits (*session, mc->dh_bits);
499
493
500
494
return 0;
501
495
}
509
503
AvahiIfIndex if_index,
510
504
mandos_context *mc){
511
505
int ret, tcp_sd;
512
ssize_t sret;
513
506
union { struct sockaddr in; struct sockaddr_in6 in6; } to;
514
507
char *buffer = NULL;
515
508
char *decrypted_buffer;
521
514
char interface[IF_NAMESIZE];
522
515
gnutls_session_t session;
523
516
524
ret = init_gnutls_session(mc, &session);
525
if(ret != 0){
517
ret = init_gnutls_session (mc, &session);
518
if (ret != 0){
526
519
return -1;
527
520
}
528
521
550
543
/* It would be nice to have a way to detect if we were passed an
551
544
IPv4 address here. Now we assume an IPv6 address. */
552
545
ret = inet_pton(AF_INET6, ip, &to.in6.sin6_addr);
553
if(ret < 0 ){
546
if (ret < 0 ){
554
547
perror("inet_pton");
555
548
return -1;
556
549
}
558
551
fprintf(stderr, "Bad address: %s\n", ip);
559
552
return -1;
560
553
}
561
to.in6.sin6_port = htons(port); /* Spurious warnings from
562
-Wconversion and
563
-Wunreachable-code */
554
to.in6.sin6_port = htons(port); /* Spurious warning */
564
555
565
556
to.in6.sin6_scope_id = (uint32_t)if_index;
566
557
579
570
}
580
571
581
572
ret = connect(tcp_sd, &to.in, sizeof(to));
582
if(ret < 0){
573
if (ret < 0){
583
574
perror("connect");
584
575
return -1;
585
576
}
586
577
587
578
const char *out = mandos_protocol_version;
588
579
written = 0;
589
while(true){
580
while (true){
590
581
size_t out_size = strlen(out);
591
ret = (int)TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
582
ret = TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
592
583
out_size - written));
593
if(ret == -1){
584
if (ret == -1){
594
585
perror("write");
595
586
retval = -1;
596
587
goto mandos_end;
599
590
if(written < out_size){
600
591
continue;
601
592
} else {
602
if(out == mandos_protocol_version){
593
if (out == mandos_protocol_version){
603
594
written = 0;
604
595
out = "\r\n";
605
596
} else {
612
603
fprintf(stderr, "Establishing TLS session with %s\n", ip);
613
604
}
614
605
615
gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t) tcp_sd);
606
gnutls_transport_set_ptr (session, (gnutls_transport_ptr_t) tcp_sd);
616
607
617
608
do{
618
ret = gnutls_handshake(session);
609
ret = gnutls_handshake (session);
619
610
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
620
611
621
if(ret != GNUTLS_E_SUCCESS){
612
if (ret != GNUTLS_E_SUCCESS){
622
613
if(debug){
623
614
fprintf(stderr, "*** GnuTLS Handshake failed ***\n");
624
gnutls_perror(ret);
615
gnutls_perror (ret);
625
616
}
626
617
retval = -1;
627
618
goto mandos_end;
637
628
while(true){
638
629
buffer_capacity = adjustbuffer(&buffer, buffer_length,
639
630
buffer_capacity);
640
if(buffer_capacity == 0){
631
if (buffer_capacity == 0){
641
632
perror("adjustbuffer");
642
633
retval = -1;
643
634
goto mandos_end;
644
635
}
645
636
646
sret = gnutls_record_recv(session, buffer+buffer_length,
647
BUFFER_SIZE);
648
if(sret == 0){
637
ret = gnutls_record_recv(session, buffer+buffer_length,
638
BUFFER_SIZE);
639
if (ret == 0){
649
640
break;
650
641
}
651
if(sret < 0){
652
switch(sret){
642
if (ret < 0){
643
switch(ret){
653
644
case GNUTLS_E_INTERRUPTED:
654
645
case GNUTLS_E_AGAIN:
655
646
break;
656
647
case GNUTLS_E_REHANDSHAKE:
657
648
do{
658
ret = gnutls_handshake(session);
649
ret = gnutls_handshake (session);
659
650
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
660
if(ret < 0){
651
if (ret < 0){
661
652
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
662
gnutls_perror(ret);
653
gnutls_perror (ret);
663
654
retval = -1;
664
655
goto mandos_end;
665
656
}
668
659
fprintf(stderr, "Unknown error while reading data from"
669
660
" encrypted session with Mandos server\n");
670
661
retval = -1;
671
gnutls_bye(session, GNUTLS_SHUT_RDWR);
662
gnutls_bye (session, GNUTLS_SHUT_RDWR);
672
663
goto mandos_end;
673
664
}
674
665
} else {
675
buffer_length += (size_t) sret;
666
buffer_length += (size_t) ret;
676
667
}
677
668
}
678
669
680
671
fprintf(stderr, "Closing TLS session\n");
681
672
}
682
673
683
gnutls_bye(session, GNUTLS_SHUT_RDWR);
674
gnutls_bye (session, GNUTLS_SHUT_RDWR);
684
675
685
if(buffer_length > 0){
676
if (buffer_length > 0){
686
677
decrypted_buffer_size = pgp_packet_decrypt(mc, buffer,
687
678
buffer_length,
688
679
&decrypted_buffer);
689
if(decrypted_buffer_size >= 0){
680
if (decrypted_buffer_size >= 0){
690
681
written = 0;
691
682
while(written < (size_t) decrypted_buffer_size){
692
ret = (int)fwrite(decrypted_buffer + written, 1,
693
(size_t)decrypted_buffer_size - written,
694
stdout);
683
ret = (int)fwrite (decrypted_buffer + written, 1,
684
(size_t)decrypted_buffer_size - written,
685
stdout);
695
686
if(ret == 0 and ferror(stdout)){
696
687
if(debug){
697
688
fprintf(stderr, "Error writing encrypted data: %s\n",
714
705
715
706
mandos_end:
716
707
free(buffer);
717
ret = (int)TEMP_FAILURE_RETRY(close(tcp_sd));
708
ret = TEMP_FAILURE_RETRY(close(tcp_sd));
718
709
if(ret == -1){
719
710
perror("close");
720
711
}
721
gnutls_deinit(session);
712
gnutls_deinit (session);
722
713
return retval;
723
714
}
724
715
742
733
/* Called whenever a service has been resolved successfully or
743
734
timed out */
744
735
745
switch(event) {
736
switch (event) {
746
737
default:
747
738
case AVAHI_RESOLVER_FAILURE:
748
739
fprintf(stderr, "(Avahi Resolver) Failed to resolve service '%s'"
756
747
avahi_address_snprint(ip, sizeof(ip), address);
757
748
if(debug){
758
749
fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %"
759
PRIdMAX ") on port %" PRIu16 "\n", name, host_name,
760
ip, (intmax_t)interface, port);
750
PRIu16 ") on port %d\n", name, host_name, ip,
751
interface, port);
761
752
}
762
753
int ret = start_mandos_communication(ip, port, interface, mc);
763
if(ret == 0){
754
if (ret == 0){
764
755
avahi_simple_poll_quit(mc->simple_poll);
765
756
}
766
757
}
784
775
/* Called whenever a new services becomes available on the LAN or
785
776
is removed from the LAN */
786
777
787
switch(event) {
778
switch (event) {
788
779
default:
789
780
case AVAHI_BROWSER_FAILURE:
790
781
799
790
the callback function is called the Avahi server will free the
800
791
resolver for us. */
801
792
802
if(!(avahi_s_service_resolver_new(mc->server, interface,
793
if (!(avahi_s_service_resolver_new(mc->server, interface,
803
794
protocol, name, type, domain,
804
795
AVAHI_PROTO_INET6, 0,
805
796
resolve_callback, mc)))
823
814
AvahiSServiceBrowser *sb = NULL;
824
815
int error;
825
816
int ret;
826
intmax_t tmpmax;
827
int numchars;
828
817
int exitcode = EXIT_SUCCESS;
829
818
const char *interface = "eth0";
830
819
struct ifreq network;
833
822
gid_t gid;
834
823
char *connect_to = NULL;
835
824
char tempdir[] = "/tmp/mandosXXXXXX";
836
bool tempdir_created = false;
837
825
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
838
826
const char *seckey = PATHDIR "/" SECKEY;
839
827
const char *pubkey = PATHDIR "/" PUBKEY;
841
829
mandos_context mc = { .simple_poll = NULL, .server = NULL,
842
830
.dh_bits = 1024, .priority = "SECURE256"
843
831
":!CTYPE-X.509:+CTYPE-OPENPGP" };
844
bool gnutls_initialized = false;
845
bool gpgme_initialized = false;
846
double delay = 2.5;
832
bool gnutls_initalized = false;
833
bool pgpme_initalized = false;
847
834
848
835
{
849
836
struct argp_option options[] = {
875
862
.arg = "STRING",
876
863
.doc = "GnuTLS priority string for the TLS handshake",
877
864
.group = 1 },
878
{ .name = "delay", .key = 131,
879
.arg = "SECONDS",
880
.doc = "Maximum delay to wait for interface startup",
881
.group = 2 },
882
865
{ .name = NULL }
883
866
};
884
867
885
error_t parse_opt(int key, char *arg,
886
struct argp_state *state) {
887
switch(key) {
868
error_t parse_opt (int key, char *arg,
869
struct argp_state *state) {
870
/* Get the INPUT argument from `argp_parse', which we know is
871
a pointer to our plugin list pointer. */
872
switch (key) {
888
873
case 128: /* --debug */
889
874
debug = true;
890
875
break;
901
886
pubkey = arg;
902
887
break;
903
888
case 129: /* --dh-bits */
904
ret = sscanf(arg, "%" SCNdMAX "%n", &tmpmax, &numchars);
905
if(ret < 1 or tmpmax != (typeof(mc.dh_bits))tmpmax
906
or arg[numchars] != '\0'){
907
fprintf(stderr, "Bad number of DH bits\n");
889
errno = 0;
890
mc.dh_bits = (unsigned int) strtol(arg, NULL, 10);
891
if (errno){
892
perror("strtol");
908
893
exit(EXIT_FAILURE);
909
894
}
910
mc.dh_bits = (typeof(mc.dh_bits))tmpmax;
911
895
break;
912
896
case 130: /* --priority */
913
897
mc.priority = arg;
914
898
break;
915
case 131: /* --delay */
916
ret = sscanf(arg, "%lf%n", &delay, &numchars);
917
if(ret < 1 or arg[numchars] != '\0'){
918
fprintf(stderr, "Bad delay\n");
919
exit(EXIT_FAILURE);
920
}
921
break;
922
899
case ARGP_KEY_ARG:
923
argp_usage(state);
900
argp_usage (state);
924
901
case ARGP_KEY_END:
925
902
break;
926
903
default:
933
910
.args_doc = "",
934
911
.doc = "Mandos client -- Get and decrypt"
935
912
" passwords from a Mandos server" };
936
ret = argp_parse(&argp, argc, argv, 0, 0, NULL);
937
if(ret == ARGP_ERR_UNKNOWN){
913
ret = argp_parse (&argp, argc, argv, 0, 0, NULL);
914
if (ret == ARGP_ERR_UNKNOWN){
938
915
fprintf(stderr, "Unknown error while parsing arguments\n");
939
916
exitcode = EXIT_FAILURE;
940
917
goto end;
943
920
944
921
/* If the interface is down, bring it up */
945
922
{
946
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
947
messages to mess up the prompt */
948
ret = klogctl(8, NULL, 5);
949
if(ret == -1){
950
perror("klogctl");
951
}
952
953
923
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
954
924
if(sd < 0) {
955
925
perror("socket");
956
926
exitcode = EXIT_FAILURE;
957
ret = klogctl(7, NULL, 0);
958
if(ret == -1){
959
perror("klogctl");
960
}
961
927
goto end;
962
928
}
963
929
strcpy(network.ifr_name, interface);
964
930
ret = ioctl(sd, SIOCGIFFLAGS, &network);
965
931
if(ret == -1){
966
932
perror("ioctl SIOCGIFFLAGS");
967
ret = klogctl(7, NULL, 0);
968
if(ret == -1){
969
perror("klogctl");
970
}
971
933
exitcode = EXIT_FAILURE;
972
934
goto end;
973
935
}
977
939
if(ret == -1){
978
940
perror("ioctl SIOCSIFFLAGS");
979
941
exitcode = EXIT_FAILURE;
980
ret = klogctl(7, NULL, 0);
981
if(ret == -1){
982
perror("klogctl");
983
}
984
942
goto end;
985
943
}
986
944
}
987
/* sleep checking until interface is running */
988
for(int i=0; i < delay * 4; i++){
989
ret = ioctl(sd, SIOCGIFFLAGS, &network);
990
if(ret == -1){
991
perror("ioctl SIOCGIFFLAGS");
992
} else if(network.ifr_flags & IFF_RUNNING){
993
break;
994
}
995
struct timespec sleeptime = { .tv_nsec = 250000000 };
996
nanosleep(&sleeptime, NULL);
997
}
998
ret = (int)TEMP_FAILURE_RETRY(close(sd));
945
ret = TEMP_FAILURE_RETRY(close(sd));
999
946
if(ret == -1){
1000
947
perror("close");
1001
948
}
1002
/* Restores kernel loglevel to default */
1003
ret = klogctl(7, NULL, 0);
1004
if(ret == -1){
1005
perror("klogctl");
1006
}
1007
949
}
1008
950
1009
951
uid = getuid();
1010
952
gid = getgid();
1011
953
954
ret = setuid(uid);
955
if (ret == -1){
956
perror("setuid");
957
}
958
1012
959
setgid(gid);
1013
if(ret == -1){
960
if (ret == -1){
1014
961
perror("setgid");
1015
962
}
1016
963
1017
ret = setuid(uid);
1018
if(ret == -1){
1019
perror("setuid");
1020
}
1021
1022
964
ret = init_gnutls_global(&mc, pubkey, seckey);
1023
if(ret == -1){
965
if (ret == -1){
1024
966
fprintf(stderr, "init_gnutls_global failed\n");
1025
967
exitcode = EXIT_FAILURE;
1026
968
goto end;
1027
969
} else {
1028
gnutls_initialized = true;
970
gnutls_initalized = true;
1029
971
}
1030
972
1031
973
if(mkdtemp(tempdir) == NULL){
1032
974
perror("mkdtemp");
975
tempdir[0] = '\0';
1033
976
goto end;
1034
977
}
1035
tempdir_created = true;
1036
978
1037
979
if(not init_gpgme(&mc, pubkey, seckey, tempdir)){
1038
fprintf(stderr, "init_gpgme failed\n");
980
fprintf(stderr, "pgpme_initalized failed\n");
1039
981
exitcode = EXIT_FAILURE;
1040
982
goto end;
1041
983
} else {
1042
gpgme_initialized = true;
984
pgpme_initalized = true;
1043
985
}
1044
986
1045
987
if_index = (AvahiIfIndex) if_nametoindex(interface);
1046
988
if(if_index == 0){
1047
989
fprintf(stderr, "No such interface: \"%s\"\n", interface);
1048
exitcode = EXIT_FAILURE;
1049
goto end;
990
exit(EXIT_FAILURE);
1050
991
}
1051
992
1052
993
if(connect_to != NULL){
1058
999
exitcode = EXIT_FAILURE;
1059
1000
goto end;
1060
1001
}
1061
uint16_t port;
1062
ret = sscanf(address+1, "%" SCNdMAX "%n", &tmpmax, &numchars);
1063
if(ret < 1 or tmpmax != (uint16_t)tmpmax
1064
or address[numchars+1] != '\0'){
1065
fprintf(stderr, "Bad port number\n");
1002
errno = 0;
1003
uint16_t port = (uint16_t) strtol(address+1, NULL, 10);
1004
if(errno){
1005
perror("Bad port number");
1066
1006
exitcode = EXIT_FAILURE;
1067
1007
goto end;
1068
1008
}
1069
port = (uint16_t)tmpmax;
1070
1009
*address = '\0';
1071
1010
address = connect_to;
1072
1011
ret = start_mandos_communication(address, port, if_index, &mc);
1078
1017
goto end;
1079
1018
}
1080
1019
1081
if(not debug){
1020
if (not debug){
1082
1021
avahi_set_log_function(empty_log);
1083
1022
}
1084
1023
1087
1026
1088
1027
/* Allocate main Avahi loop object */
1089
1028
mc.simple_poll = avahi_simple_poll_new();
1090
if(mc.simple_poll == NULL) {
1029
if (mc.simple_poll == NULL) {
1091
1030
fprintf(stderr, "Avahi: Failed to create simple poll"
1092
1031
" object.\n");
1093
1032
exitcode = EXIT_FAILURE;
1113
1052
}
1114
1053
1115
1054
/* Check if creating the Avahi server object succeeded */
1116
if(mc.server == NULL) {
1055
if (mc.server == NULL) {
1117
1056
fprintf(stderr, "Failed to create Avahi server: %s\n",
1118
1057
avahi_strerror(error));
1119
1058
exitcode = EXIT_FAILURE;
1125
1064
AVAHI_PROTO_INET6,
1126
1065
"_mandos._tcp", NULL, 0,
1127
1066
browse_callback, &mc);
1128
if(sb == NULL) {
1067
if (sb == NULL) {
1129
1068
fprintf(stderr, "Failed to create service browser: %s\n",
1130
1069
avahi_strerror(avahi_server_errno(mc.server)));
1131
1070
exitcode = EXIT_FAILURE;
1134
1073
1135
1074
/* Run the main loop */
1136
1075
1137
if(debug){
1076
if (debug){
1138
1077
fprintf(stderr, "Starting Avahi loop search\n");
1139
1078
}
1140
1079
1141
1080
avahi_simple_poll_loop(mc.simple_poll);
1142
1081
1143
1082
end:
1144
1083
1145
if(debug){
1084
if (debug){
1146
1085
fprintf(stderr, "%s exiting\n", argv[0]);
1147
1086
}
1148
1087
1149
1088
/* Cleanup things */
1150
if(sb != NULL)
1089
if (sb != NULL)
1151
1090
avahi_s_service_browser_free(sb);
1152
1091
1153
if(mc.server != NULL)
1092
if (mc.server != NULL)
1154
1093
avahi_server_free(mc.server);
1155
1094
1156
if(mc.simple_poll != NULL)
1095
if (mc.simple_poll != NULL)
1157
1096
avahi_simple_poll_free(mc.simple_poll);
1158
1097
1159
if(gnutls_initialized){
1098
if (gnutls_initalized){
1160
1099
gnutls_certificate_free_credentials(mc.cred);
1161
gnutls_global_deinit();
1162
gnutls_dh_params_deinit(mc.dh_params);
1100
gnutls_global_deinit ();
1163
1101
}
1164
1102
1165
if(gpgme_initialized){
1103
if(pgpme_initalized){
1166
1104
gpgme_release(mc.ctx);
1167
1105
}
1168
1106
1169
1107
/* Removes the temp directory used by GPGME */
1170
if(tempdir_created){
1108
if(tempdir[0] != '\0'){
1171
1109
DIR *d;
1172
1110
struct dirent *direntry;
1173
1111
d = opendir(tempdir);
1174
1112
if(d == NULL){
1175
if(errno != ENOENT){
1176
perror("opendir");
1177
}
1113
perror("opendir");
1178
1114
} else {
1179
1115
while(true){
1180
1116
direntry = readdir(d);
1181
1117
if(direntry == NULL){
1182
1118
break;
1183
1119
}
1184
/* Skip "." and ".." */
1185
if(direntry->d_name[0] == '.'
1186
and (direntry->d_name[1] == '\0'
1187
or (direntry->d_name[1] == '.'
1188
and direntry->d_name[2] == '\0'))){
1189
continue;
1190
}
1191
char *fullname = NULL;
1192
ret = asprintf(&fullname, "%s/%s", tempdir,
1193
direntry->d_name);
1194
if(ret < 0){
1195
perror("asprintf");
1196
continue;
1197
}
1198
ret = remove(fullname);
1199
if(ret == -1){
1200
fprintf(stderr, "remove(\"%s\"): %s\n", fullname,
1201
strerror(errno));
1202
}
1203
free(fullname);
1120
if (direntry->d_type == DT_REG){
1121
char *fullname = NULL;
1122
ret = asprintf(&fullname, "%s/%s", tempdir,
1123
direntry->d_name);
1124
if(ret < 0){
1125
perror("asprintf");
1126
continue;
1127
}
1128
ret = unlink(fullname);
1129
if(ret == -1){
1130
fprintf(stderr, "unlink(\"%s\"): %s",
1131
fullname, strerror(errno));
1132
}
1133
free(fullname);
1134
}
1204
1135
}
1205
closedir(d);
1206
1136
}
1207
1137
ret = rmdir(tempdir);
1208
if(ret == -1 and errno != ENOENT){
1138
if(ret == -1){
1209
1139
perror("rmdir");
1210
1140
}
1211
1141
}
1212
1142
1213
1143
return exitcode;
1214
1144
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0