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- Committer: Teddy Hogeborn
- Date: 2009-02-09 02:01:13 UTC
- Revision ID: teddy@fukt.bsnet.se-20090209020113-726hq380zvp8zt97
Four new interrelated features:
1. Support using a different network interface via both initramfs.conf
(the DEVICE setting) and the kernel command line (sixth field of
the "ip=" option as in Linux' Documentation/nfsroot.txt).
2. Support connecting to a specified Mandos server directly using a
kernel command line option ("mandos=connect:<ADDRESS>:<PORT>").
3. Support connecting directly to an IPv4 address (and port) using the
"--connect" option of mandos-client.
4. Support an empty string to the --interface option to mandos-client.
* Makefile (WARN): Increase strictness by changing to
"-Wstrict-aliasing=1".
* debian/mandos-client.README.Debian (Use the Correct Network
Interface): Changed to refer to initramfs.conf and nfsroot.txt.
(Test the Server): Improve wording.
(Non-local Connection): New section.
* initramfs-tools-script: Obey DEVICE environment variable and setting
from "/conf/initramfs.conf". Also let any
"ip=" kernel command line option override
it. Support new "mandos=connect" option.
Call "configure_networking" to set up IP
address on interface if necessary.
* plugin-runner.conf: Change example.
* plugins.d/mandos-client.c: Some whitespace and comment changes.
(start_mandos_communication): Take an additional argument for
address family, all callers changed.
Connect to an IPv4 address if address
family is AF_INET. Only set IPv6
scope_id for link-local addresses.
(main): Accept empty interface name; this will not bring up any
interface and leave the interface as unspecified. Also do
not restore kernel log level if lowering it failed.
* plugins.d/mandos-client.xml (OPTIONS): Document that the
"--interface" option accepts
an empty string.
(EXAMPLE): Change example IPv6 address to a link-local address.
1. Support using a different network interface via both initramfs.conf
(the DEVICE setting) and the kernel command line (sixth field of
the "ip=" option as in Linux' Documentation/nfsroot.txt).
2. Support connecting to a specified Mandos server directly using a
kernel command line option ("mandos=connect:<ADDRESS>:<PORT>").
3. Support connecting directly to an IPv4 address (and port) using the
"--connect" option of mandos-client.
4. Support an empty string to the --interface option to mandos-client.
* Makefile (WARN): Increase strictness by changing to
"-Wstrict-aliasing=1".
* debian/mandos-client.README.Debian (Use the Correct Network
Interface): Changed to refer to initramfs.conf and nfsroot.txt.
(Test the Server): Improve wording.
(Non-local Connection): New section.
* initramfs-tools-script: Obey DEVICE environment variable and setting
from "/conf/initramfs.conf". Also let any
"ip=" kernel command line option override
it. Support new "mandos=connect" option.
Call "configure_networking" to set up IP
address on interface if necessary.
* plugin-runner.conf: Change example.
* plugins.d/mandos-client.c: Some whitespace and comment changes.
(start_mandos_communication): Take an additional argument for
address family, all callers changed.
Connect to an IPv4 address if address
family is AF_INET. Only set IPv6
scope_id for link-local addresses.
(main): Accept empty interface name; this will not bring up any
interface and leave the interface as unspecified. Also do
not restore kernel log level if lowering it failed.
* plugins.d/mandos-client.xml (OPTIONS): Document that the
"--interface" option accepts
an empty string.
(EXAMPLE): Change example IPv6 address to a link-local address.
- files added:
- .bzr-builddeb
- debian
- debian/po
- files removed:
- plugins.d/usplash
- files renamed:
- plugins.d/password-request.c => plugins.d/mandos-client.c
- plugins.d/password-request.xml => plugins.d/mandos-client.xml
- files modified:
- .bzrignore
added
removed
plugins.d/mandos-client.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 © 2007-2008 Teddy Hogeborn & Björn Påhlsson
12
* Copyright © 2008,2009 Teddy Hogeborn
13
* Copyright © 2008,2009 Björn Påhlsson
13
14
*
14
15
* This program is free software: you can redistribute it and/or
15
16
* modify it under the terms of the GNU General Public License as
35
36
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), asprintf() */
36
37
37
38
#include <stdio.h> /* fprintf(), stderr, fwrite(),
38
stdout, ferror() */
39
stdout, ferror(), sscanf(),
40
remove() */
39
41
#include <stdint.h> /* uint16_t, uint32_t */
40
42
#include <stddef.h> /* NULL, size_t, ssize_t */
41
43
#include <stdlib.h> /* free(), EXIT_SUCCESS, EXIT_FAILURE,
42
44
srand() */
43
#include <stdbool.h> /* bool, true */
45
#include <stdbool.h> /* bool, false, true */
44
46
#include <string.h> /* memset(), strcmp(), strlen(),
45
47
strerror(), asprintf(), strcpy() */
46
#include <sys/ioctl.h> /* ioctl */
48
#include <sys/ioctl.h> /* ioctl */
47
49
#include <sys/types.h> /* socket(), inet_pton(), sockaddr,
48
50
sockaddr_in6, PF_INET6,
49
SOCK_STREAM, INET6_ADDRSTRLEN,
50
uid_t, gid_t */
51
#include <inttypes.h> /* PRIu16 */
51
SOCK_STREAM, uid_t, gid_t, open(),
52
opendir(), DIR */
53
#include <sys/stat.h> /* open() */
52
54
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
53
struct in6_addr, inet_pton(),
54
connect() */
55
inet_pton(), connect() */
56
#include <fcntl.h> /* open() */
57
#include <dirent.h> /* opendir(), struct dirent, readdir()
58
*/
59
#include <inttypes.h> /* PRIu16, intmax_t, SCNdMAX */
55
60
#include <assert.h> /* assert() */
56
61
#include <errno.h> /* perror(), errno */
57
#include <time.h> /* time() */
62
#include <time.h> /* nanosleep(), time() */
58
63
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
59
64
SIOCSIFFLAGS, if_indextoname(),
60
65
if_nametoindex(), IF_NAMESIZE */
66
#include <netinet/in.h> /* IN6_IS_ADDR_LINKLOCAL,
67
INET_ADDRSTRLEN, INET6_ADDRSTRLEN
68
*/
61
69
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
62
70
getuid(), getgid(), setuid(),
63
71
setgid() */
64
#include <netinet/in.h>
65
72
#include <arpa/inet.h> /* inet_pton(), htons */
66
#include <iso646.h> /* not, and */
73
#include <iso646.h> /* not, or, and */
67
74
#include <argp.h> /* struct argp_option, error_t, struct
68
75
argp_state, struct argp,
69
76
argp_parse(), ARGP_KEY_ARG,
70
77
ARGP_KEY_END, ARGP_ERR_UNKNOWN */
78
#ifdef __linux__
79
#include <sys/klog.h> /* klogctl() */
80
#endif
71
81
72
82
/* Avahi */
73
83
/* All Avahi types, constants and functions
86
96
gnutls_*
87
97
init_gnutls_session(),
88
98
GNUTLS_* */
89
#include <gnutls/openpgp.h> /* gnutls_certificate_set_openpgp_key_file(),
99
#include <gnutls/openpgp.h>
100
/* gnutls_certificate_set_openpgp_key_file(),
90
101
GNUTLS_OPENPGP_FMT_BASE64 */
91
102
92
103
/* GPGME */
98
109
99
110
#define BUFFER_SIZE 256
100
111
112
#define PATHDIR "/conf/conf.d/mandos"
113
#define SECKEY "seckey.txt"
114
#define PUBKEY "pubkey.txt"
115
101
116
bool debug = false;
102
static const char *keydir = "/conf/conf.d/mandos";
103
117
static const char mandos_protocol_version[] = "1";
104
const char *argp_program_version = "password-request 1.0";
118
const char *argp_program_version = "mandos-client " VERSION;
105
119
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
106
120
107
121
/* Used for passing in values through the Avahi callback functions */
112
126
unsigned int dh_bits;
113
127
gnutls_dh_params_t dh_params;
114
128
const char *priority;
129
gpgme_ctx_t ctx;
115
130
} mandos_context;
116
131
117
132
/*
121
136
*/
122
137
size_t adjustbuffer(char **buffer, size_t buffer_length,
123
138
size_t buffer_capacity){
124
if (buffer_length + BUFFER_SIZE > buffer_capacity){
139
if(buffer_length + BUFFER_SIZE > buffer_capacity){
125
140
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
126
if (buffer == NULL){
141
if(buffer == NULL){
127
142
return 0;
128
143
}
129
144
buffer_capacity += BUFFER_SIZE;
132
147
}
133
148
134
149
/*
135
* Decrypt OpenPGP data using keyrings in HOMEDIR.
136
* Returns -1 on error
150
* Initialize GPGME.
137
151
*/
138
static ssize_t pgp_packet_decrypt (const char *cryptotext,
139
size_t crypto_size,
140
char **plaintext,
141
const char *homedir){
142
gpgme_data_t dh_crypto, dh_plain;
143
gpgme_ctx_t ctx;
152
static bool init_gpgme(mandos_context *mc, const char *seckey,
153
const char *pubkey, const char *tempdir){
154
int ret;
144
155
gpgme_error_t rc;
145
ssize_t ret;
146
size_t plaintext_capacity = 0;
147
ssize_t plaintext_length = 0;
148
156
gpgme_engine_info_t engine_info;
149
157
150
if (debug){
151
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
158
159
/*
160
* Helper function to insert pub and seckey to the engine keyring.
161
*/
162
bool import_key(const char *filename){
163
int fd;
164
gpgme_data_t pgp_data;
165
166
fd = (int)TEMP_FAILURE_RETRY(open(filename, O_RDONLY));
167
if(fd == -1){
168
perror("open");
169
return false;
170
}
171
172
rc = gpgme_data_new_from_fd(&pgp_data, fd);
173
if(rc != GPG_ERR_NO_ERROR){
174
fprintf(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
175
gpgme_strsource(rc), gpgme_strerror(rc));
176
return false;
177
}
178
179
rc = gpgme_op_import(mc->ctx, pgp_data);
180
if(rc != GPG_ERR_NO_ERROR){
181
fprintf(stderr, "bad gpgme_op_import: %s: %s\n",
182
gpgme_strsource(rc), gpgme_strerror(rc));
183
return false;
184
}
185
186
ret = (int)TEMP_FAILURE_RETRY(close(fd));
187
if(ret == -1){
188
perror("close");
189
}
190
gpgme_data_release(pgp_data);
191
return true;
192
}
193
194
if(debug){
195
fprintf(stderr, "Initialize gpgme\n");
152
196
}
153
197
154
198
/* Init GPGME */
155
199
gpgme_check_version(NULL);
156
200
rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
157
if (rc != GPG_ERR_NO_ERROR){
201
if(rc != GPG_ERR_NO_ERROR){
158
202
fprintf(stderr, "bad gpgme_engine_check_version: %s: %s\n",
159
203
gpgme_strsource(rc), gpgme_strerror(rc));
160
return -1;
204
return false;
161
205
}
162
206
163
/* Set GPGME home directory for the OpenPGP engine only */
164
rc = gpgme_get_engine_info (&engine_info);
165
if (rc != GPG_ERR_NO_ERROR){
207
/* Set GPGME home directory for the OpenPGP engine only */
208
rc = gpgme_get_engine_info(&engine_info);
209
if(rc != GPG_ERR_NO_ERROR){
166
210
fprintf(stderr, "bad gpgme_get_engine_info: %s: %s\n",
167
211
gpgme_strsource(rc), gpgme_strerror(rc));
168
return -1;
212
return false;
169
213
}
170
214
while(engine_info != NULL){
171
215
if(engine_info->protocol == GPGME_PROTOCOL_OpenPGP){
172
216
gpgme_set_engine_info(GPGME_PROTOCOL_OpenPGP,
173
engine_info->file_name, homedir);
217
engine_info->file_name, tempdir);
174
218
break;
175
219
}
176
220
engine_info = engine_info->next;
177
221
}
178
222
if(engine_info == NULL){
179
fprintf(stderr, "Could not set GPGME home dir to %s\n", homedir);
180
return -1;
223
fprintf(stderr, "Could not set GPGME home dir to %s\n", tempdir);
224
return false;
225
}
226
227
/* Create new GPGME "context" */
228
rc = gpgme_new(&(mc->ctx));
229
if(rc != GPG_ERR_NO_ERROR){
230
fprintf(stderr, "bad gpgme_new: %s: %s\n",
231
gpgme_strsource(rc), gpgme_strerror(rc));
232
return false;
233
}
234
235
if(not import_key(pubkey) or not import_key(seckey)){
236
return false;
237
}
238
239
return true;
240
}
241
242
/*
243
* Decrypt OpenPGP data.
244
* Returns -1 on error
245
*/
246
static ssize_t pgp_packet_decrypt(const mandos_context *mc,
247
const char *cryptotext,
248
size_t crypto_size,
249
char **plaintext){
250
gpgme_data_t dh_crypto, dh_plain;
251
gpgme_error_t rc;
252
ssize_t ret;
253
size_t plaintext_capacity = 0;
254
ssize_t plaintext_length = 0;
255
256
if(debug){
257
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
181
258
}
182
259
183
260
/* Create new GPGME data buffer from memory cryptotext */
184
261
rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,
185
262
0);
186
if (rc != GPG_ERR_NO_ERROR){
263
if(rc != GPG_ERR_NO_ERROR){
187
264
fprintf(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
188
265
gpgme_strsource(rc), gpgme_strerror(rc));
189
266
return -1;
191
268
192
269
/* Create new empty GPGME data buffer for the plaintext */
193
270
rc = gpgme_data_new(&dh_plain);
194
if (rc != GPG_ERR_NO_ERROR){
271
if(rc != GPG_ERR_NO_ERROR){
195
272
fprintf(stderr, "bad gpgme_data_new: %s: %s\n",
196
273
gpgme_strsource(rc), gpgme_strerror(rc));
197
274
gpgme_data_release(dh_crypto);
198
275
return -1;
199
276
}
200
277
201
/* Create new GPGME "context" */
202
rc = gpgme_new(&ctx);
203
if (rc != GPG_ERR_NO_ERROR){
204
fprintf(stderr, "bad gpgme_new: %s: %s\n",
205
gpgme_strsource(rc), gpgme_strerror(rc));
206
plaintext_length = -1;
207
goto decrypt_end;
208
}
209
210
278
/* Decrypt data from the cryptotext data buffer to the plaintext
211
279
data buffer */
212
rc = gpgme_op_decrypt(ctx, dh_crypto, dh_plain);
213
if (rc != GPG_ERR_NO_ERROR){
280
rc = gpgme_op_decrypt(mc->ctx, dh_crypto, dh_plain);
281
if(rc != GPG_ERR_NO_ERROR){
214
282
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
215
283
gpgme_strsource(rc), gpgme_strerror(rc));
216
284
plaintext_length = -1;
217
if (debug){
285
if(debug){
218
286
gpgme_decrypt_result_t result;
219
result = gpgme_op_decrypt_result(ctx);
220
if (result == NULL){
287
result = gpgme_op_decrypt_result(mc->ctx);
288
if(result == NULL){
221
289
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
222
290
} else {
223
291
fprintf(stderr, "Unsupported algorithm: %s\n",
250
318
}
251
319
252
320
/* Seek back to the beginning of the GPGME plaintext data buffer */
253
if (gpgme_data_seek(dh_plain, (off_t) 0, SEEK_SET) == -1){
254
perror("pgpme_data_seek");
321
if(gpgme_data_seek(dh_plain, (off_t)0, SEEK_SET) == -1){
322
perror("gpgme_data_seek");
255
323
plaintext_length = -1;
256
324
goto decrypt_end;
257
325
}
261
329
plaintext_capacity = adjustbuffer(plaintext,
262
330
(size_t)plaintext_length,
263
331
plaintext_capacity);
264
if (plaintext_capacity == 0){
332
if(plaintext_capacity == 0){
265
333
perror("adjustbuffer");
266
334
plaintext_length = -1;
267
335
goto decrypt_end;
270
338
ret = gpgme_data_read(dh_plain, *plaintext + plaintext_length,
271
339
BUFFER_SIZE);
272
340
/* Print the data, if any */
273
if (ret == 0){
341
if(ret == 0){
274
342
/* EOF */
275
343
break;
276
344
}
281
349
}
282
350
plaintext_length += ret;
283
351
}
284
352
285
353
if(debug){
286
354
fprintf(stderr, "Decrypted password is: ");
287
355
for(ssize_t i = 0; i < plaintext_length; i++){
300
368
return plaintext_length;
301
369
}
302
370
303
static const char * safer_gnutls_strerror (int value) {
304
const char *ret = gnutls_strerror (value); /* Spurious warning */
305
if (ret == NULL)
371
static const char * safer_gnutls_strerror(int value){
372
const char *ret = gnutls_strerror(value); /* Spurious warning from
373
-Wunreachable-code */
374
if(ret == NULL)
306
375
ret = "(unknown)";
307
376
return ret;
308
377
}
323
392
}
324
393
325
394
ret = gnutls_global_init();
326
if (ret != GNUTLS_E_SUCCESS) {
327
fprintf (stderr, "GnuTLS global_init: %s\n",
328
safer_gnutls_strerror(ret));
395
if(ret != GNUTLS_E_SUCCESS){
396
fprintf(stderr, "GnuTLS global_init: %s\n",
397
safer_gnutls_strerror(ret));
329
398
return -1;
330
399
}
331
400
332
if (debug){
401
if(debug){
333
402
/* "Use a log level over 10 to enable all debugging options."
334
403
* - GnuTLS manual
335
404
*/
339
408
340
409
/* OpenPGP credentials */
341
410
gnutls_certificate_allocate_credentials(&mc->cred);
342
if (ret != GNUTLS_E_SUCCESS){
343
fprintf (stderr, "GnuTLS memory error: %s\n", /* Spurious
344
warning */
345
safer_gnutls_strerror(ret));
346
gnutls_global_deinit ();
411
if(ret != GNUTLS_E_SUCCESS){
412
fprintf(stderr, "GnuTLS memory error: %s\n", /* Spurious warning
413
from
414
-Wunreachable-code
415
*/
416
safer_gnutls_strerror(ret));
417
gnutls_global_deinit();
347
418
return -1;
348
419
}
349
420
350
421
if(debug){
351
fprintf(stderr, "Attempting to use OpenPGP certificate %s"
352
" and keyfile %s as GnuTLS credentials\n", pubkeyfilename,
422
fprintf(stderr, "Attempting to use OpenPGP public key %s and"
423
" secret key %s as GnuTLS credentials\n", pubkeyfilename,
353
424
seckeyfilename);
354
425
}
355
426
356
427
ret = gnutls_certificate_set_openpgp_key_file
357
428
(mc->cred, pubkeyfilename, seckeyfilename,
358
429
GNUTLS_OPENPGP_FMT_BASE64);
359
if (ret != GNUTLS_E_SUCCESS) {
430
if(ret != GNUTLS_E_SUCCESS){
360
431
fprintf(stderr,
361
432
"Error[%d] while reading the OpenPGP key pair ('%s',"
362
433
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
363
fprintf(stdout, "The GnuTLS error is: %s\n",
434
fprintf(stderr, "The GnuTLS error is: %s\n",
364
435
safer_gnutls_strerror(ret));
365
436
goto globalfail;
366
437
}
367
438
368
439
/* GnuTLS server initialization */
369
440
ret = gnutls_dh_params_init(&mc->dh_params);
370
if (ret != GNUTLS_E_SUCCESS) {
371
fprintf (stderr, "Error in GnuTLS DH parameter initialization:"
372
" %s\n", safer_gnutls_strerror(ret));
441
if(ret != GNUTLS_E_SUCCESS){
442
fprintf(stderr, "Error in GnuTLS DH parameter initialization:"
443
" %s\n", safer_gnutls_strerror(ret));
373
444
goto globalfail;
374
445
}
375
446
ret = gnutls_dh_params_generate2(mc->dh_params, mc->dh_bits);
376
if (ret != GNUTLS_E_SUCCESS) {
377
fprintf (stderr, "Error in GnuTLS prime generation: %s\n",
378
safer_gnutls_strerror(ret));
447
if(ret != GNUTLS_E_SUCCESS){
448
fprintf(stderr, "Error in GnuTLS prime generation: %s\n",
449
safer_gnutls_strerror(ret));
379
450
goto globalfail;
380
451
}
381
452
382
453
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
383
454
384
455
return 0;
385
456
386
457
globalfail:
387
458
388
459
gnutls_certificate_free_credentials(mc->cred);
389
460
gnutls_global_deinit();
461
gnutls_dh_params_deinit(mc->dh_params);
390
462
return -1;
391
392
463
}
393
464
394
465
static int init_gnutls_session(mandos_context *mc,
396
467
int ret;
397
468
/* GnuTLS session creation */
398
469
ret = gnutls_init(session, GNUTLS_SERVER);
399
if (ret != GNUTLS_E_SUCCESS){
470
if(ret != GNUTLS_E_SUCCESS){
400
471
fprintf(stderr, "Error in GnuTLS session initialization: %s\n",
401
472
safer_gnutls_strerror(ret));
402
473
}
404
475
{
405
476
const char *err;
406
477
ret = gnutls_priority_set_direct(*session, mc->priority, &err);
407
if (ret != GNUTLS_E_SUCCESS) {
478
if(ret != GNUTLS_E_SUCCESS){
408
479
fprintf(stderr, "Syntax error at: %s\n", err);
409
480
fprintf(stderr, "GnuTLS error: %s\n",
410
481
safer_gnutls_strerror(ret));
411
gnutls_deinit (*session);
482
gnutls_deinit(*session);
412
483
return -1;
413
484
}
414
485
}
415
486
416
487
ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,
417
488
mc->cred);
418
if (ret != GNUTLS_E_SUCCESS) {
489
if(ret != GNUTLS_E_SUCCESS){
419
490
fprintf(stderr, "Error setting GnuTLS credentials: %s\n",
420
491
safer_gnutls_strerror(ret));
421
gnutls_deinit (*session);
492
gnutls_deinit(*session);
422
493
return -1;
423
494
}
424
495
425
496
/* ignore client certificate if any. */
426
gnutls_certificate_server_set_request (*session,
427
GNUTLS_CERT_IGNORE);
497
gnutls_certificate_server_set_request(*session,
498
GNUTLS_CERT_IGNORE);
428
499
429
gnutls_dh_set_prime_bits (*session, mc->dh_bits);
500
gnutls_dh_set_prime_bits(*session, mc->dh_bits);
430
501
431
502
return 0;
432
503
}
438
509
/* Called when a Mandos server is found */
439
510
static int start_mandos_communication(const char *ip, uint16_t port,
440
511
AvahiIfIndex if_index,
441
mandos_context *mc){
512
mandos_context *mc, int af){
442
513
int ret, tcp_sd;
443
union { struct sockaddr in; struct sockaddr_in6 in6; } to;
514
ssize_t sret;
515
union {
516
struct sockaddr_in in;
517
struct sockaddr_in6 in6;
518
} to;
444
519
char *buffer = NULL;
445
520
char *decrypted_buffer;
446
521
size_t buffer_length = 0;
448
523
ssize_t decrypted_buffer_size;
449
524
size_t written;
450
525
int retval = 0;
451
char interface[IF_NAMESIZE];
452
526
gnutls_session_t session;
453
454
ret = init_gnutls_session (mc, &session);
455
if (ret != 0){
527
int pf; /* Protocol family */
528
529
switch(af){
530
case AF_INET6:
531
pf = PF_INET6;
532
break;
533
case AF_INET:
534
pf = PF_INET;
535
break;
536
default:
537
fprintf(stderr, "Bad address family: %d\n", af);
538
return -1;
539
}
540
541
ret = init_gnutls_session(mc, &session);
542
if(ret != 0){
456
543
return -1;
457
544
}
458
545
459
546
if(debug){
460
fprintf(stderr, "Setting up a tcp connection to %s, port %" PRIu16
547
fprintf(stderr, "Setting up a TCP connection to %s, port %" PRIu16
461
548
"\n", ip, port);
462
549
}
463
550
464
tcp_sd = socket(PF_INET6, SOCK_STREAM, 0);
465
if(tcp_sd < 0) {
551
tcp_sd = socket(pf, SOCK_STREAM, 0);
552
if(tcp_sd < 0){
466
553
perror("socket");
467
554
return -1;
468
555
}
469
470
if(debug){
471
if(if_indextoname((unsigned int)if_index, interface) == NULL){
472
perror("if_indextoname");
473
return -1;
474
}
475
fprintf(stderr, "Binding to interface %s\n", interface);
476
}
477
556
478
557
memset(&to, 0, sizeof(to));
479
to.in6.sin6_family = AF_INET6;
480
/* It would be nice to have a way to detect if we were passed an
481
IPv4 address here. Now we assume an IPv6 address. */
482
ret = inet_pton(AF_INET6, ip, &to.in6.sin6_addr);
483
if (ret < 0 ){
558
if(af == AF_INET6){
559
to.in6.sin6_family = (uint16_t)af;
560
ret = inet_pton(af, ip, &to.in6.sin6_addr);
561
} else { /* IPv4 */
562
to.in.sin_family = (sa_family_t)af;
563
ret = inet_pton(af, ip, &to.in.sin_addr);
564
}
565
if(ret < 0 ){
484
566
perror("inet_pton");
485
567
return -1;
486
568
}
488
570
fprintf(stderr, "Bad address: %s\n", ip);
489
571
return -1;
490
572
}
491
to.in6.sin6_port = htons(port); /* Spurious warning */
492
493
to.in6.sin6_scope_id = (uint32_t)if_index;
573
if(af == AF_INET6){
574
to.in6.sin6_port = htons(port); /* Spurious warnings from
575
-Wconversion and
576
-Wunreachable-code */
577
578
if(IN6_IS_ADDR_LINKLOCAL /* Spurious warnings from */
579
(&to.in6.sin6_addr)){ /* -Wstrict-aliasing=2 or lower and
580
-Wunreachable-code*/
581
if(if_index == AVAHI_IF_UNSPEC){
582
fprintf(stderr, "An IPv6 link-local address is incomplete"
583
" without a network interface\n");
584
return -1;
585
}
586
/* Set the network interface number as scope */
587
to.in6.sin6_scope_id = (uint32_t)if_index;
588
}
589
} else {
590
to.in.sin_port = htons(port); /* Spurious warnings from
591
-Wconversion and
592
-Wunreachable-code */
593
}
494
594
495
595
if(debug){
496
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
497
port);
498
char addrstr[INET6_ADDRSTRLEN] = "";
499
if(inet_ntop(to.in6.sin6_family, &(to.in6.sin6_addr), addrstr,
500
sizeof(addrstr)) == NULL){
596
if(af == AF_INET6 and if_index != AVAHI_IF_UNSPEC){
597
char interface[IF_NAMESIZE];
598
if(if_indextoname((unsigned int)if_index, interface) == NULL){
599
perror("if_indextoname");
600
} else {
601
fprintf(stderr, "Connection to: %s%%%s, port %" PRIu16 "\n",
602
ip, interface, port);
603
}
604
} else {
605
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
606
port);
607
}
608
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
609
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
610
const char *pcret;
611
if(af == AF_INET6){
612
pcret = inet_ntop(af, &(to.in6.sin6_addr), addrstr,
613
sizeof(addrstr));
614
} else {
615
pcret = inet_ntop(af, &(to.in.sin_addr), addrstr,
616
sizeof(addrstr));
617
}
618
if(pcret == NULL){
501
619
perror("inet_ntop");
502
620
} else {
503
621
if(strcmp(addrstr, ip) != 0){
506
624
}
507
625
}
508
626
509
ret = connect(tcp_sd, &to.in, sizeof(to));
510
if (ret < 0){
627
if(af == AF_INET6){
628
ret = connect(tcp_sd, &to.in6, sizeof(to));
629
} else {
630
ret = connect(tcp_sd, &to.in, sizeof(to)); /* IPv4 */
631
}
632
if(ret < 0){
511
633
perror("connect");
512
634
return -1;
513
635
}
514
636
515
637
const char *out = mandos_protocol_version;
516
638
written = 0;
517
while (true){
639
while(true){
518
640
size_t out_size = strlen(out);
519
ret = TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
641
ret = (int)TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
520
642
out_size - written));
521
if (ret == -1){
643
if(ret == -1){
522
644
perror("write");
523
645
retval = -1;
524
646
goto mandos_end;
527
649
if(written < out_size){
528
650
continue;
529
651
} else {
530
if (out == mandos_protocol_version){
652
if(out == mandos_protocol_version){
531
653
written = 0;
532
654
out = "\r\n";
533
655
} else {
535
657
}
536
658
}
537
659
}
538
660
539
661
if(debug){
540
662
fprintf(stderr, "Establishing TLS session with %s\n", ip);
541
663
}
542
664
543
gnutls_transport_set_ptr (session, (gnutls_transport_ptr_t) tcp_sd);
544
665
gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t) tcp_sd);
666
545
667
do{
546
ret = gnutls_handshake (session);
668
ret = gnutls_handshake(session);
547
669
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
548
670
549
if (ret != GNUTLS_E_SUCCESS){
671
if(ret != GNUTLS_E_SUCCESS){
550
672
if(debug){
551
673
fprintf(stderr, "*** GnuTLS Handshake failed ***\n");
552
gnutls_perror (ret);
674
gnutls_perror(ret);
553
675
}
554
676
retval = -1;
555
677
goto mandos_end;
558
680
/* Read OpenPGP packet that contains the wanted password */
559
681
560
682
if(debug){
561
fprintf(stderr, "Retrieving pgp encrypted password from %s\n",
683
fprintf(stderr, "Retrieving OpenPGP encrypted password from %s\n",
562
684
ip);
563
685
}
564
686
565
687
while(true){
566
688
buffer_capacity = adjustbuffer(&buffer, buffer_length,
567
689
buffer_capacity);
568
if (buffer_capacity == 0){
690
if(buffer_capacity == 0){
569
691
perror("adjustbuffer");
570
692
retval = -1;
571
693
goto mandos_end;
572
694
}
573
695
574
ret = gnutls_record_recv(session, buffer+buffer_length,
575
BUFFER_SIZE);
576
if (ret == 0){
696
sret = gnutls_record_recv(session, buffer+buffer_length,
697
BUFFER_SIZE);
698
if(sret == 0){
577
699
break;
578
700
}
579
if (ret < 0){
580
switch(ret){
701
if(sret < 0){
702
switch(sret){
581
703
case GNUTLS_E_INTERRUPTED:
582
704
case GNUTLS_E_AGAIN:
583
705
break;
584
706
case GNUTLS_E_REHANDSHAKE:
585
707
do{
586
ret = gnutls_handshake (session);
708
ret = gnutls_handshake(session);
587
709
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
588
if (ret < 0){
710
if(ret < 0){
589
711
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
590
gnutls_perror (ret);
712
gnutls_perror(ret);
591
713
retval = -1;
592
714
goto mandos_end;
593
715
}
596
718
fprintf(stderr, "Unknown error while reading data from"
597
719
" encrypted session with Mandos server\n");
598
720
retval = -1;
599
gnutls_bye (session, GNUTLS_SHUT_RDWR);
721
gnutls_bye(session, GNUTLS_SHUT_RDWR);
600
722
goto mandos_end;
601
723
}
602
724
} else {
603
buffer_length += (size_t) ret;
725
buffer_length += (size_t) sret;
604
726
}
605
727
}
606
728
608
730
fprintf(stderr, "Closing TLS session\n");
609
731
}
610
732
611
gnutls_bye (session, GNUTLS_SHUT_RDWR);
733
gnutls_bye(session, GNUTLS_SHUT_RDWR);
612
734
613
if (buffer_length > 0){
614
decrypted_buffer_size = pgp_packet_decrypt(buffer,
735
if(buffer_length > 0){
736
decrypted_buffer_size = pgp_packet_decrypt(mc, buffer,
615
737
buffer_length,
616
&decrypted_buffer,
617
keydir);
618
if (decrypted_buffer_size >= 0){
738
&decrypted_buffer);
739
if(decrypted_buffer_size >= 0){
619
740
written = 0;
620
741
while(written < (size_t) decrypted_buffer_size){
621
ret = (int)fwrite (decrypted_buffer + written, 1,
622
(size_t)decrypted_buffer_size - written,
623
stdout);
742
ret = (int)fwrite(decrypted_buffer + written, 1,
743
(size_t)decrypted_buffer_size - written,
744
stdout);
624
745
if(ret == 0 and ferror(stdout)){
625
746
if(debug){
626
747
fprintf(stderr, "Error writing encrypted data: %s\n",
643
764
644
765
mandos_end:
645
766
free(buffer);
646
close(tcp_sd);
647
gnutls_deinit (session);
767
ret = (int)TEMP_FAILURE_RETRY(close(tcp_sd));
768
if(ret == -1){
769
perror("close");
770
}
771
gnutls_deinit(session);
648
772
return retval;
649
773
}
650
774
651
775
static void resolve_callback(AvahiSServiceResolver *r,
652
776
AvahiIfIndex interface,
653
AVAHI_GCC_UNUSED AvahiProtocol protocol,
777
AvahiProtocol proto,
654
778
AvahiResolverEvent event,
655
779
const char *name,
656
780
const char *type,
661
785
AVAHI_GCC_UNUSED AvahiStringList *txt,
662
786
AVAHI_GCC_UNUSED AvahiLookupResultFlags
663
787
flags,
664
void* userdata) {
788
void* userdata){
665
789
mandos_context *mc = userdata;
666
790
assert(r);
667
791
668
792
/* Called whenever a service has been resolved successfully or
669
793
timed out */
670
794
671
switch (event) {
795
switch(event){
672
796
default:
673
797
case AVAHI_RESOLVER_FAILURE:
674
798
fprintf(stderr, "(Avahi Resolver) Failed to resolve service '%s'"
682
806
avahi_address_snprint(ip, sizeof(ip), address);
683
807
if(debug){
684
808
fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %"
685
PRIu16 ") on port %d\n", name, host_name, ip,
686
interface, port);
809
PRIdMAX ") on port %" PRIu16 "\n", name, host_name,
810
ip, (intmax_t)interface, port);
687
811
}
688
int ret = start_mandos_communication(ip, port, interface, mc);
689
if (ret == 0){
812
int ret = start_mandos_communication(ip, port, interface, mc,
813
avahi_proto_to_af(proto));
814
if(ret == 0){
690
815
avahi_simple_poll_quit(mc->simple_poll);
691
816
}
692
817
}
694
819
avahi_s_service_resolver_free(r);
695
820
}
696
821
697
static void browse_callback( AvahiSServiceBrowser *b,
698
AvahiIfIndex interface,
699
AvahiProtocol protocol,
700
AvahiBrowserEvent event,
701
const char *name,
702
const char *type,
703
const char *domain,
704
AVAHI_GCC_UNUSED AvahiLookupResultFlags
705
flags,
706
void* userdata) {
822
static void browse_callback(AvahiSServiceBrowser *b,
823
AvahiIfIndex interface,
824
AvahiProtocol protocol,
825
AvahiBrowserEvent event,
826
const char *name,
827
const char *type,
828
const char *domain,
829
AVAHI_GCC_UNUSED AvahiLookupResultFlags
830
flags,
831
void* userdata){
707
832
mandos_context *mc = userdata;
708
833
assert(b);
709
834
710
835
/* Called whenever a new services becomes available on the LAN or
711
836
is removed from the LAN */
712
837
713
switch (event) {
838
switch(event){
714
839
default:
715
840
case AVAHI_BROWSER_FAILURE:
716
841
725
850
the callback function is called the Avahi server will free the
726
851
resolver for us. */
727
852
728
if (!(avahi_s_service_resolver_new(mc->server, interface,
853
if(!(avahi_s_service_resolver_new(mc->server, interface,
729
854
protocol, name, type, domain,
730
855
AVAHI_PROTO_INET6, 0,
731
856
resolve_callback, mc)))
745
870
}
746
871
}
747
872
748
/* Combines file name and path and returns the malloced new
749
string. some sane checks could/should be added */
750
static char *combinepath(const char *first, const char *second){
751
char *tmp;
752
int ret = asprintf(&tmp, "%s/%s", first, second);
753
if(ret < 0){
754
return NULL;
755
}
756
return tmp;
757
}
758
759
760
873
int main(int argc, char *argv[]){
761
AvahiSServiceBrowser *sb = NULL;
762
int error;
763
int ret;
764
int exitcode = EXIT_SUCCESS;
765
const char *interface = "eth0";
766
struct ifreq network;
767
int sd;
768
uid_t uid;
769
gid_t gid;
770
char *connect_to = NULL;
771
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
772
char *pubkeyfilename = NULL;
773
char *seckeyfilename = NULL;
774
const char *pubkeyname = "pubkey.txt";
775
const char *seckeyname = "seckey.txt";
776
mandos_context mc = { .simple_poll = NULL, .server = NULL,
777
.dh_bits = 1024, .priority = "SECURE256"};
778
bool gnutls_initalized = false;
779
780
{
781
struct argp_option options[] = {
782
{ .name = "debug", .key = 128,
783
.doc = "Debug mode", .group = 3 },
784
{ .name = "connect", .key = 'c',
785
.arg = "IP",
786
.doc = "Connect directly to a sepcified mandos server",
787
.group = 1 },
788
{ .name = "interface", .key = 'i',
789
.arg = "INTERFACE",
790
.doc = "Interface that Avahi will conntect through",
791
.group = 1 },
792
{ .name = "keydir", .key = 'd',
793
.arg = "KEYDIR",
794
.doc = "Directory where the openpgp keyring is",
795
.group = 1 },
796
{ .name = "seckey", .key = 's',
797
.arg = "SECKEY",
798
.doc = "Secret openpgp key for gnutls authentication",
799
.group = 1 },
800
{ .name = "pubkey", .key = 'p',
801
.arg = "PUBKEY",
802
.doc = "Public openpgp key for gnutls authentication",
803
.group = 2 },
804
{ .name = "dh-bits", .key = 129,
805
.arg = "BITS",
806
.doc = "dh-bits to use in gnutls communication",
807
.group = 2 },
808
{ .name = "priority", .key = 130,
809
.arg = "PRIORITY",
810
.doc = "GNUTLS priority", .group = 1 },
811
{ .name = NULL }
812
};
813
814
815
error_t parse_opt (int key, char *arg,
816
struct argp_state *state) {
817
/* Get the INPUT argument from `argp_parse', which we know is
818
a pointer to our plugin list pointer. */
819
switch (key) {
820
case 128:
821
debug = true;
822
break;
823
case 'c':
824
connect_to = arg;
825
break;
826
case 'i':
827
interface = arg;
828
break;
829
case 'd':
830
keydir = arg;
831
break;
832
case 's':
833
seckeyname = arg;
834
break;
835
case 'p':
836
pubkeyname = arg;
837
break;
838
case 129:
839
errno = 0;
840
mc.dh_bits = (unsigned int) strtol(arg, NULL, 10);
841
if (errno){
842
perror("strtol");
843
exit(EXIT_FAILURE);
874
AvahiSServiceBrowser *sb = NULL;
875
int error;
876
int ret;
877
intmax_t tmpmax;
878
int numchars;
879
int exitcode = EXIT_SUCCESS;
880
const char *interface = "eth0";
881
struct ifreq network;
882
int sd;
883
uid_t uid;
884
gid_t gid;
885
char *connect_to = NULL;
886
char tempdir[] = "/tmp/mandosXXXXXX";
887
bool tempdir_created = false;
888
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
889
const char *seckey = PATHDIR "/" SECKEY;
890
const char *pubkey = PATHDIR "/" PUBKEY;
891
892
mandos_context mc = { .simple_poll = NULL, .server = NULL,
893
.dh_bits = 1024, .priority = "SECURE256"
894
":!CTYPE-X.509:+CTYPE-OPENPGP" };
895
bool gnutls_initialized = false;
896
bool gpgme_initialized = false;
897
double delay = 2.5;
898
899
{
900
struct argp_option options[] = {
901
{ .name = "debug", .key = 128,
902
.doc = "Debug mode", .group = 3 },
903
{ .name = "connect", .key = 'c',
904
.arg = "ADDRESS:PORT",
905
.doc = "Connect directly to a specific Mandos server",
906
.group = 1 },
907
{ .name = "interface", .key = 'i',
908
.arg = "NAME",
909
.doc = "Network interface that will be used to search for"
910
" Mandos servers",
911
.group = 1 },
912
{ .name = "seckey", .key = 's',
913
.arg = "FILE",
914
.doc = "OpenPGP secret key file base name",
915
.group = 1 },
916
{ .name = "pubkey", .key = 'p',
917
.arg = "FILE",
918
.doc = "OpenPGP public key file base name",
919
.group = 2 },
920
{ .name = "dh-bits", .key = 129,
921
.arg = "BITS",
922
.doc = "Bit length of the prime number used in the"
923
" Diffie-Hellman key exchange",
924
.group = 2 },
925
{ .name = "priority", .key = 130,
926
.arg = "STRING",
927
.doc = "GnuTLS priority string for the TLS handshake",
928
.group = 1 },
929
{ .name = "delay", .key = 131,
930
.arg = "SECONDS",
931
.doc = "Maximum delay to wait for interface startup",
932
.group = 2 },
933
{ .name = NULL }
934
};
935
936
error_t parse_opt(int key, char *arg,
937
struct argp_state *state){
938
switch(key){
939
case 128: /* --debug */
940
debug = true;
941
break;
942
case 'c': /* --connect */
943
connect_to = arg;
944
break;
945
case 'i': /* --interface */
946
interface = arg;
947
break;
948
case 's': /* --seckey */
949
seckey = arg;
950
break;
951
case 'p': /* --pubkey */
952
pubkey = arg;
953
break;
954
case 129: /* --dh-bits */
955
ret = sscanf(arg, "%" SCNdMAX "%n", &tmpmax, &numchars);
956
if(ret < 1 or tmpmax != (typeof(mc.dh_bits))tmpmax
957
or arg[numchars] != '\0'){
958
fprintf(stderr, "Bad number of DH bits\n");
959
exit(EXIT_FAILURE);
960
}
961
mc.dh_bits = (typeof(mc.dh_bits))tmpmax;
962
break;
963
case 130: /* --priority */
964
mc.priority = arg;
965
break;
966
case 131: /* --delay */
967
ret = sscanf(arg, "%lf%n", &delay, &numchars);
968
if(ret < 1 or arg[numchars] != '\0'){
969
fprintf(stderr, "Bad delay\n");
970
exit(EXIT_FAILURE);
971
}
972
break;
973
case ARGP_KEY_ARG:
974
argp_usage(state);
975
case ARGP_KEY_END:
976
break;
977
default:
978
return ARGP_ERR_UNKNOWN;
979
}
980
return 0;
981
}
982
983
struct argp argp = { .options = options, .parser = parse_opt,
984
.args_doc = "",
985
.doc = "Mandos client -- Get and decrypt"
986
" passwords from a Mandos server" };
987
ret = argp_parse(&argp, argc, argv, 0, 0, NULL);
988
if(ret == ARGP_ERR_UNKNOWN){
989
fprintf(stderr, "Unknown error while parsing arguments\n");
990
exitcode = EXIT_FAILURE;
991
goto end;
992
}
993
}
994
995
/* If the interface is down, bring it up */
996
if(interface[0] != '\0'){
997
#ifdef __linux__
998
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
999
messages to mess up the prompt */
1000
ret = klogctl(8, NULL, 5);
1001
bool restore_loglevel = true;
1002
if(ret == -1){
1003
restore_loglevel = false;
1004
perror("klogctl");
1005
}
1006
#endif
1007
1008
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1009
if(sd < 0){
1010
perror("socket");
1011
exitcode = EXIT_FAILURE;
1012
#ifdef __linux__
1013
if(restore_loglevel){
1014
ret = klogctl(7, NULL, 0);
1015
if(ret == -1){
1016
perror("klogctl");
1017
}
1018
}
1019
#endif
1020
goto end;
1021
}
1022
strcpy(network.ifr_name, interface);
1023
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1024
if(ret == -1){
1025
perror("ioctl SIOCGIFFLAGS");
1026
#ifdef __linux__
1027
if(restore_loglevel){
1028
ret = klogctl(7, NULL, 0);
1029
if(ret == -1){
1030
perror("klogctl");
1031
}
1032
}
1033
#endif
1034
exitcode = EXIT_FAILURE;
1035
goto end;
1036
}
1037
if((network.ifr_flags & IFF_UP) == 0){
1038
network.ifr_flags |= IFF_UP;
1039
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1040
if(ret == -1){
1041
perror("ioctl SIOCSIFFLAGS");
1042
exitcode = EXIT_FAILURE;
1043
#ifdef __linux__
1044
if(restore_loglevel){
1045
ret = klogctl(7, NULL, 0);
1046
if(ret == -1){
1047
perror("klogctl");
844
1048
}
845
break;
846
case 130:
847
mc.priority = arg;
848
break;
849
case ARGP_KEY_ARG:
850
argp_usage (state);
851
case ARGP_KEY_END:
852
break;
853
default:
854
return ARGP_ERR_UNKNOWN;
855
1049
}
856
return 0;
857
}
858
859
struct argp argp = { .options = options, .parser = parse_opt,
860
.args_doc = "",
861
.doc = "Mandos client -- Get and decrypt"
862
" passwords from mandos server" };
863
ret = argp_parse (&argp, argc, argv, 0, 0, NULL);
864
if (ret == ARGP_ERR_UNKNOWN){
865
fprintf(stderr, "Unknown error while parsing arguments\n");
866
exitcode = EXIT_FAILURE;
867
goto end;
868
}
869
}
870
871
pubkeyfilename = combinepath(keydir, pubkeyname);
872
if (pubkeyfilename == NULL){
873
perror("combinepath");
874
exitcode = EXIT_FAILURE;
875
goto end;
876
}
877
878
seckeyfilename = combinepath(keydir, seckeyname);
879
if (seckeyfilename == NULL){
880
perror("combinepath");
881
exitcode = EXIT_FAILURE;
882
goto end;
883
}
884
885
ret = init_gnutls_global(&mc, pubkeyfilename, seckeyfilename);
886
if (ret == -1){
887
fprintf(stderr, "init_gnutls_global failed\n");
888
exitcode = EXIT_FAILURE;
889
goto end;
890
} else {
891
gnutls_initalized = true;
892
}
893
894
/* If the interface is down, bring it up */
895
{
896
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
897
if(sd < 0) {
898
perror("socket");
899
exitcode = EXIT_FAILURE;
900
goto end;
901
}
902
strcpy(network.ifr_name, interface);
1050
#endif
1051
goto end;
1052
}
1053
}
1054
/* sleep checking until interface is running */
1055
for(int i=0; i < delay * 4; i++){
903
1056
ret = ioctl(sd, SIOCGIFFLAGS, &network);
904
1057
if(ret == -1){
905
1058
perror("ioctl SIOCGIFFLAGS");
906
exitcode = EXIT_FAILURE;
907
goto end;
908
}
909
if((network.ifr_flags & IFF_UP) == 0){
910
network.ifr_flags |= IFF_UP;
911
ret = ioctl(sd, SIOCSIFFLAGS, &network);
912
if(ret == -1){
913
perror("ioctl SIOCSIFFLAGS");
914
exitcode = EXIT_FAILURE;
915
goto end;
916
}
917
}
918
close(sd);
919
}
920
921
uid = getuid();
922
gid = getgid();
923
924
ret = setuid(uid);
925
if (ret == -1){
926
perror("setuid");
927
}
928
929
setgid(gid);
930
if (ret == -1){
931
perror("setgid");
932
}
933
1059
} else if(network.ifr_flags & IFF_RUNNING){
1060
break;
1061
}
1062
struct timespec sleeptime = { .tv_nsec = 250000000 };
1063
ret = nanosleep(&sleeptime, NULL);
1064
if(ret == -1 and errno != EINTR){
1065
perror("nanosleep");
1066
}
1067
}
1068
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1069
if(ret == -1){
1070
perror("close");
1071
}
1072
#ifdef __linux__
1073
if(restore_loglevel){
1074
/* Restores kernel loglevel to default */
1075
ret = klogctl(7, NULL, 0);
1076
if(ret == -1){
1077
perror("klogctl");
1078
}
1079
}
1080
#endif
1081
}
1082
1083
uid = getuid();
1084
gid = getgid();
1085
1086
errno = 0;
1087
setgid(gid);
1088
if(ret == -1){
1089
perror("setgid");
1090
}
1091
1092
ret = setuid(uid);
1093
if(ret == -1){
1094
perror("setuid");
1095
}
1096
1097
ret = init_gnutls_global(&mc, pubkey, seckey);
1098
if(ret == -1){
1099
fprintf(stderr, "init_gnutls_global failed\n");
1100
exitcode = EXIT_FAILURE;
1101
goto end;
1102
} else {
1103
gnutls_initialized = true;
1104
}
1105
1106
if(mkdtemp(tempdir) == NULL){
1107
perror("mkdtemp");
1108
goto end;
1109
}
1110
tempdir_created = true;
1111
1112
if(not init_gpgme(&mc, pubkey, seckey, tempdir)){
1113
fprintf(stderr, "init_gpgme failed\n");
1114
exitcode = EXIT_FAILURE;
1115
goto end;
1116
} else {
1117
gpgme_initialized = true;
1118
}
1119
1120
if(interface[0] != '\0'){
934
1121
if_index = (AvahiIfIndex) if_nametoindex(interface);
935
1122
if(if_index == 0){
936
1123
fprintf(stderr, "No such interface: \"%s\"\n", interface);
937
exit(EXIT_FAILURE);
938
}
939
940
if(connect_to != NULL){
941
/* Connect directly, do not use Zeroconf */
942
/* (Mainly meant for debugging) */
943
char *address = strrchr(connect_to, ':');
944
if(address == NULL){
945
fprintf(stderr, "No colon in address\n");
946
exitcode = EXIT_FAILURE;
947
goto end;
948
}
949
errno = 0;
950
uint16_t port = (uint16_t) strtol(address+1, NULL, 10);
951
if(errno){
952
perror("Bad port number");
953
exitcode = EXIT_FAILURE;
954
goto end;
955
}
956
*address = '\0';
957
address = connect_to;
958
ret = start_mandos_communication(address, port, if_index, &mc);
959
if(ret < 0){
960
exitcode = EXIT_FAILURE;
961
} else {
962
exitcode = EXIT_SUCCESS;
963
}
964
goto end;
965
}
966
967
if (not debug){
968
avahi_set_log_function(empty_log);
969
}
970
971
/* Initialize the pseudo-RNG for Avahi */
972
srand((unsigned int) time(NULL));
973
974
/* Allocate main Avahi loop object */
975
mc.simple_poll = avahi_simple_poll_new();
976
if (mc.simple_poll == NULL) {
977
fprintf(stderr, "Avahi: Failed to create simple poll"
978
" object.\n");
979
exitcode = EXIT_FAILURE;
980
goto end;
981
}
982
983
{
984
AvahiServerConfig config;
985
/* Do not publish any local Zeroconf records */
986
avahi_server_config_init(&config);
987
config.publish_hinfo = 0;
988
config.publish_addresses = 0;
989
config.publish_workstation = 0;
990
config.publish_domain = 0;
991
992
/* Allocate a new server */
993
mc.server = avahi_server_new(avahi_simple_poll_get
994
(mc.simple_poll), &config, NULL,
995
NULL, &error);
996
997
/* Free the Avahi configuration data */
998
avahi_server_config_free(&config);
999
}
1000
1001
/* Check if creating the Avahi server object succeeded */
1002
if (mc.server == NULL) {
1003
fprintf(stderr, "Failed to create Avahi server: %s\n",
1004
avahi_strerror(error));
1005
exitcode = EXIT_FAILURE;
1006
goto end;
1007
}
1008
1009
/* Create the Avahi service browser */
1010
sb = avahi_s_service_browser_new(mc.server, if_index,
1011
AVAHI_PROTO_INET6,
1012
"_mandos._tcp", NULL, 0,
1013
browse_callback, &mc);
1014
if (sb == NULL) {
1015
fprintf(stderr, "Failed to create service browser: %s\n",
1016
avahi_strerror(avahi_server_errno(mc.server)));
1017
exitcode = EXIT_FAILURE;
1018
goto end;
1019
}
1020
1021
/* Run the main loop */
1022
1023
if (debug){
1024
fprintf(stderr, "Starting Avahi loop search\n");
1025
}
1026
1027
avahi_simple_poll_loop(mc.simple_poll);
1028
1124
exitcode = EXIT_FAILURE;
1125
goto end;
1126
}
1127
}
1128
1129
if(connect_to != NULL){
1130
/* Connect directly, do not use Zeroconf */
1131
/* (Mainly meant for debugging) */
1132
char *address = strrchr(connect_to, ':');
1133
if(address == NULL){
1134
fprintf(stderr, "No colon in address\n");
1135
exitcode = EXIT_FAILURE;
1136
goto end;
1137
}
1138
uint16_t port;
1139
ret = sscanf(address+1, "%" SCNdMAX "%n", &tmpmax, &numchars);
1140
if(ret < 1 or tmpmax != (uint16_t)tmpmax
1141
or address[numchars+1] != '\0'){
1142
fprintf(stderr, "Bad port number\n");
1143
exitcode = EXIT_FAILURE;
1144
goto end;
1145
}
1146
port = (uint16_t)tmpmax;
1147
*address = '\0';
1148
address = connect_to;
1149
/* Colon in address indicates IPv6 */
1150
int af;
1151
if(strchr(address, ':') != NULL){
1152
af = AF_INET6;
1153
} else {
1154
af = AF_INET;
1155
}
1156
ret = start_mandos_communication(address, port, if_index, &mc,
1157
af);
1158
if(ret < 0){
1159
exitcode = EXIT_FAILURE;
1160
} else {
1161
exitcode = EXIT_SUCCESS;
1162
}
1163
goto end;
1164
}
1165
1166
if(not debug){
1167
avahi_set_log_function(empty_log);
1168
}
1169
1170
/* Initialize the pseudo-RNG for Avahi */
1171
srand((unsigned int) time(NULL));
1172
1173
/* Allocate main Avahi loop object */
1174
mc.simple_poll = avahi_simple_poll_new();
1175
if(mc.simple_poll == NULL){
1176
fprintf(stderr, "Avahi: Failed to create simple poll object.\n");
1177
exitcode = EXIT_FAILURE;
1178
goto end;
1179
}
1180
1181
{
1182
AvahiServerConfig config;
1183
/* Do not publish any local Zeroconf records */
1184
avahi_server_config_init(&config);
1185
config.publish_hinfo = 0;
1186
config.publish_addresses = 0;
1187
config.publish_workstation = 0;
1188
config.publish_domain = 0;
1189
1190
/* Allocate a new server */
1191
mc.server = avahi_server_new(avahi_simple_poll_get
1192
(mc.simple_poll), &config, NULL,
1193
NULL, &error);
1194
1195
/* Free the Avahi configuration data */
1196
avahi_server_config_free(&config);
1197
}
1198
1199
/* Check if creating the Avahi server object succeeded */
1200
if(mc.server == NULL){
1201
fprintf(stderr, "Failed to create Avahi server: %s\n",
1202
avahi_strerror(error));
1203
exitcode = EXIT_FAILURE;
1204
goto end;
1205
}
1206
1207
/* Create the Avahi service browser */
1208
sb = avahi_s_service_browser_new(mc.server, if_index,
1209
AVAHI_PROTO_INET6, "_mandos._tcp",
1210
NULL, 0, browse_callback, &mc);
1211
if(sb == NULL){
1212
fprintf(stderr, "Failed to create service browser: %s\n",
1213
avahi_strerror(avahi_server_errno(mc.server)));
1214
exitcode = EXIT_FAILURE;
1215
goto end;
1216
}
1217
1218
/* Run the main loop */
1219
1220
if(debug){
1221
fprintf(stderr, "Starting Avahi loop search\n");
1222
}
1223
1224
avahi_simple_poll_loop(mc.simple_poll);
1225
1029
1226
end:
1030
1031
if (debug){
1032
fprintf(stderr, "%s exiting\n", argv[0]);
1033
}
1034
1035
/* Cleanup things */
1036
if (sb != NULL)
1037
avahi_s_service_browser_free(sb);
1038
1039
if (mc.server != NULL)
1040
avahi_server_free(mc.server);
1041
1042
if (mc.simple_poll != NULL)
1043
avahi_simple_poll_free(mc.simple_poll);
1044
free(pubkeyfilename);
1045
free(seckeyfilename);
1046
1047
if (gnutls_initalized){
1048
gnutls_certificate_free_credentials(mc.cred);
1049
gnutls_global_deinit ();
1050
}
1051
1052
return exitcode;
1227
1228
if(debug){
1229
fprintf(stderr, "%s exiting\n", argv[0]);
1230
}
1231
1232
/* Cleanup things */
1233
if(sb != NULL)
1234
avahi_s_service_browser_free(sb);
1235
1236
if(mc.server != NULL)
1237
avahi_server_free(mc.server);
1238
1239
if(mc.simple_poll != NULL)
1240
avahi_simple_poll_free(mc.simple_poll);
1241
1242
if(gnutls_initialized){
1243
gnutls_certificate_free_credentials(mc.cred);
1244
gnutls_global_deinit();
1245
gnutls_dh_params_deinit(mc.dh_params);
1246
}
1247
1248
if(gpgme_initialized){
1249
gpgme_release(mc.ctx);
1250
}
1251
1252
/* Removes the temp directory used by GPGME */
1253
if(tempdir_created){
1254
DIR *d;
1255
struct dirent *direntry;
1256
d = opendir(tempdir);
1257
if(d == NULL){
1258
if(errno != ENOENT){
1259
perror("opendir");
1260
}
1261
} else {
1262
while(true){
1263
direntry = readdir(d);
1264
if(direntry == NULL){
1265
break;
1266
}
1267
/* Skip "." and ".." */
1268
if(direntry->d_name[0] == '.'
1269
and (direntry->d_name[1] == '\0'
1270
or (direntry->d_name[1] == '.'
1271
and direntry->d_name[2] == '\0'))){
1272
continue;
1273
}
1274
char *fullname = NULL;
1275
ret = asprintf(&fullname, "%s/%s", tempdir,
1276
direntry->d_name);
1277
if(ret < 0){
1278
perror("asprintf");
1279
continue;
1280
}
1281
ret = remove(fullname);
1282
if(ret == -1){
1283
fprintf(stderr, "remove(\"%s\"): %s\n", fullname,
1284
strerror(errno));
1285
}
1286
free(fullname);
1287
}
1288
closedir(d);
1289
}
1290
ret = rmdir(tempdir);
1291
if(ret == -1 and errno != ENOENT){
1292
perror("rmdir");
1293
}
1294
}
1295
1296
return exitcode;
1053
1297
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0