25
25
* along with this program. If not, see
26
26
* <http://www.gnu.org/licenses/>.
28
* Contact the authors at <mandos@fukt.bsnet.se>.
28
* Contact the authors at <https://www.fukt.bsnet.se/~belorn/> and
29
* <https://www.fukt.bsnet.se/~teddy/>.
31
/* Needed by GPGME, specifically gpgme_data_seek() */
32
#define _FORTIFY_SOURCE 2
32
34
#define _LARGEFILE_SOURCE
33
35
#define _FILE_OFFSET_BITS 64
35
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), asprintf() */
37
#include <stdio.h> /* fprintf(), stderr, fwrite(),
39
#include <stdint.h> /* uint16_t, uint32_t */
40
#include <stddef.h> /* NULL, size_t, ssize_t */
41
#include <stdlib.h> /* free(), EXIT_SUCCESS, EXIT_FAILURE,
43
#include <stdbool.h> /* bool, true */
44
#include <string.h> /* memset(), strcmp(), strlen(),
45
strerror(), asprintf(), strcpy() */
46
#include <sys/ioctl.h> /* ioctl */
47
#include <sys/types.h> /* socket(), inet_pton(), sockaddr,
48
sockaddr_in6, PF_INET6,
49
SOCK_STREAM, INET6_ADDRSTRLEN,
51
#include <inttypes.h> /* PRIu16 */
52
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
53
struct in6_addr, inet_pton(),
55
#include <assert.h> /* assert() */
56
#include <errno.h> /* perror(), errno */
57
#include <time.h> /* time() */
58
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
59
SIOCSIFFLAGS, if_indextoname(),
60
if_nametoindex(), IF_NAMESIZE */
61
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
62
getuid(), getgid(), setuid(),
64
#include <netinet/in.h>
65
#include <arpa/inet.h> /* inet_pton(), htons */
66
#include <iso646.h> /* not, and */
67
#include <argp.h> /* struct argp_option, error_t, struct
68
argp_state, struct argp,
69
argp_parse(), ARGP_KEY_ARG,
70
ARGP_KEY_END, ARGP_ERR_UNKNOWN */
73
/* All Avahi types, constants and functions
41
#include <net/if.h> /* if_nametoindex */
76
43
#include <avahi-core/core.h>
77
44
#include <avahi-core/lookup.h>
78
45
#include <avahi-core/log.h>
80
47
#include <avahi-common/malloc.h>
81
48
#include <avahi-common/error.h>
84
#include <gnutls/gnutls.h> /* All GnuTLS types, constants and
87
init_gnutls_session(),
89
#include <gnutls/openpgp.h> /* gnutls_certificate_set_openpgp_key_file(),
90
GNUTLS_OPENPGP_FMT_BASE64 */
93
#include <gpgme.h> /* All GPGME types, constants and
96
GPGME_PROTOCOL_OpenPGP,
51
#include <sys/types.h> /* socket(), inet_pton() */
52
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
53
struct in6_addr, inet_pton() */
54
#include <gnutls/gnutls.h> /* All GnuTLS stuff */
55
#include <gnutls/openpgp.h> /* GnuTLS with openpgp stuff */
57
#include <unistd.h> /* close() */
58
#include <netinet/in.h>
59
#include <stdbool.h> /* true */
60
#include <string.h> /* memset */
61
#include <arpa/inet.h> /* inet_pton() */
62
#include <iso646.h> /* not */
65
#include <errno.h> /* perror() */
99
71
#define BUFFER_SIZE 256
74
const char *certdir = "/conf/conf.d/cryptkeyreq/";
75
const char *certfile = "openpgp-client.txt";
76
const char *certkey = "openpgp-client-key.txt";
101
78
bool debug = false;
102
static const char *keydir = "/conf/conf.d/mandos";
103
static const char mandos_protocol_version[] = "1";
104
const char *argp_program_version = "password-request 1.0";
105
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
107
/* Used for passing in values through the Avahi callback functions */
109
AvahiSimplePoll *simple_poll;
81
gnutls_session_t session;
111
82
gnutls_certificate_credentials_t cred;
112
unsigned int dh_bits;
113
83
gnutls_dh_params_t dh_params;
114
const char *priority;
118
* Make room in "buffer" for at least BUFFER_SIZE additional bytes.
119
* "buffer_capacity" is how much is currently allocated,
120
* "buffer_length" is how much is already used.
122
size_t adjustbuffer(char **buffer, size_t buffer_length,
123
size_t buffer_capacity){
124
if (buffer_length + BUFFER_SIZE > buffer_capacity){
125
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
129
buffer_capacity += BUFFER_SIZE;
131
return buffer_capacity;
135
* Decrypt OpenPGP data using keyrings in HOMEDIR.
136
* Returns -1 on error
138
static ssize_t pgp_packet_decrypt (const char *cryptotext,
141
const char *homedir){
87
ssize_t pgp_packet_decrypt (char *packet, size_t packet_size,
88
char **new_packet, const char *homedir){
142
89
gpgme_data_t dh_crypto, dh_plain;
146
size_t plaintext_capacity = 0;
147
ssize_t plaintext_length = 0;
93
ssize_t new_packet_capacity = 0;
94
ssize_t new_packet_length = 0;
148
95
gpgme_engine_info_t engine_info;
151
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
98
fprintf(stderr, "Trying to decrypt OpenPGP packet\n");
203
148
if (rc != GPG_ERR_NO_ERROR){
204
149
fprintf(stderr, "bad gpgme_new: %s: %s\n",
205
150
gpgme_strsource(rc), gpgme_strerror(rc));
206
plaintext_length = -1;
210
/* Decrypt data from the cryptotext data buffer to the plaintext
154
/* Decrypt data from the FILE pointer to the plaintext data
212
156
rc = gpgme_op_decrypt(ctx, dh_crypto, dh_plain);
213
157
if (rc != GPG_ERR_NO_ERROR){
214
158
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
215
159
gpgme_strsource(rc), gpgme_strerror(rc));
216
plaintext_length = -1;
218
gpgme_decrypt_result_t result;
219
result = gpgme_op_decrypt_result(ctx);
221
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
223
fprintf(stderr, "Unsupported algorithm: %s\n",
224
result->unsupported_algorithm);
225
fprintf(stderr, "Wrong key usage: %u\n",
226
result->wrong_key_usage);
227
if(result->file_name != NULL){
228
fprintf(stderr, "File name: %s\n", result->file_name);
230
gpgme_recipient_t recipient;
231
recipient = result->recipients;
233
while(recipient != NULL){
234
fprintf(stderr, "Public key algorithm: %s\n",
235
gpgme_pubkey_algo_name(recipient->pubkey_algo));
236
fprintf(stderr, "Key ID: %s\n", recipient->keyid);
237
fprintf(stderr, "Secret key available: %s\n",
238
recipient->status == GPG_ERR_NO_SECKEY
240
recipient = recipient->next;
164
fprintf(stderr, "Decryption of OpenPGP packet succeeded\n");
168
gpgme_decrypt_result_t result;
169
result = gpgme_op_decrypt_result(ctx);
171
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
173
fprintf(stderr, "Unsupported algorithm: %s\n",
174
result->unsupported_algorithm);
175
fprintf(stderr, "Wrong key usage: %d\n",
176
result->wrong_key_usage);
177
if(result->file_name != NULL){
178
fprintf(stderr, "File name: %s\n", result->file_name);
180
gpgme_recipient_t recipient;
181
recipient = result->recipients;
183
while(recipient != NULL){
184
fprintf(stderr, "Public key algorithm: %s\n",
185
gpgme_pubkey_algo_name(recipient->pubkey_algo));
186
fprintf(stderr, "Key ID: %s\n", recipient->keyid);
187
fprintf(stderr, "Secret key available: %s\n",
188
recipient->status == GPG_ERR_NO_SECKEY
190
recipient = recipient->next;
249
fprintf(stderr, "Decryption of OpenPGP data succeeded\n");
196
/* Delete the GPGME FILE pointer cryptotext data buffer */
197
gpgme_data_release(dh_crypto);
252
199
/* Seek back to the beginning of the GPGME plaintext data buffer */
253
200
if (gpgme_data_seek(dh_plain, (off_t) 0, SEEK_SET) == -1){
254
201
perror("pgpme_data_seek");
255
plaintext_length = -1;
261
plaintext_capacity = adjustbuffer(plaintext,
262
(size_t)plaintext_length,
264
if (plaintext_capacity == 0){
265
perror("adjustbuffer");
266
plaintext_length = -1;
206
if (new_packet_length + BUFFER_SIZE > new_packet_capacity){
207
*new_packet = realloc(*new_packet,
208
(unsigned int)new_packet_capacity
210
if (*new_packet == NULL){
214
new_packet_capacity += BUFFER_SIZE;
270
ret = gpgme_data_read(dh_plain, *plaintext + plaintext_length,
217
ret = gpgme_data_read(dh_plain, *new_packet + new_packet_length,
272
219
/* Print the data, if any */
278
224
perror("gpgme_data_read");
279
plaintext_length = -1;
282
plaintext_length += ret;
227
new_packet_length += ret;
286
fprintf(stderr, "Decrypted password is: ");
287
for(ssize_t i = 0; i < plaintext_length; i++){
288
fprintf(stderr, "%02hhX ", (*plaintext)[i]);
290
fprintf(stderr, "\n");
295
/* Delete the GPGME cryptotext data buffer */
296
gpgme_data_release(dh_crypto);
230
/* FIXME: check characters before printing to screen so to not print
231
terminal control characters */
233
/* fprintf(stderr, "decrypted password is: "); */
234
/* fwrite(*new_packet, 1, new_packet_length, stderr); */
235
/* fprintf(stderr, "\n"); */
298
238
/* Delete the GPGME plaintext data buffer */
299
239
gpgme_data_release(dh_plain);
300
return plaintext_length;
240
return new_packet_length;
303
243
static const char * safer_gnutls_strerror (int value) {
304
const char *ret = gnutls_strerror (value); /* Spurious warning */
244
const char *ret = gnutls_strerror (value);
306
246
ret = "(unknown)";
310
/* GnuTLS log function callback */
311
static void debuggnutls(__attribute__((unused)) int level,
313
fprintf(stderr, "GnuTLS: %s", string);
250
void debuggnutls(__attribute__((unused)) int level,
252
fprintf(stderr, "%s", string);
316
static int init_gnutls_global(mandos_context *mc,
317
const char *pubkeyfilename,
318
const char *seckeyfilename){
255
int initgnutls(encrypted_session *es){
322
260
fprintf(stderr, "Initializing GnuTLS\n");
325
ret = gnutls_global_init();
326
if (ret != GNUTLS_E_SUCCESS) {
327
fprintf (stderr, "GnuTLS global_init: %s\n",
328
safer_gnutls_strerror(ret));
263
if ((ret = gnutls_global_init ())
264
!= GNUTLS_E_SUCCESS) {
265
fprintf (stderr, "global_init: %s\n", safer_gnutls_strerror(ret));
333
/* "Use a log level over 10 to enable all debugging options."
336
270
gnutls_global_set_log_level(11);
337
271
gnutls_global_set_log_function(debuggnutls);
340
/* OpenPGP credentials */
341
gnutls_certificate_allocate_credentials(&mc->cred);
342
if (ret != GNUTLS_E_SUCCESS){
343
fprintf (stderr, "GnuTLS memory error: %s\n", /* Spurious
274
/* openpgp credentials */
275
if ((ret = gnutls_certificate_allocate_credentials (&es->cred))
276
!= GNUTLS_E_SUCCESS) {
277
fprintf (stderr, "memory error: %s\n",
345
278
safer_gnutls_strerror(ret));
346
gnutls_global_deinit ();
351
283
fprintf(stderr, "Attempting to use OpenPGP certificate %s"
352
" and keyfile %s as GnuTLS credentials\n", pubkeyfilename,
284
" and keyfile %s as GnuTLS credentials\n", certfile,
356
288
ret = gnutls_certificate_set_openpgp_key_file
357
(mc->cred, pubkeyfilename, seckeyfilename,
358
GNUTLS_OPENPGP_FMT_BASE64);
289
(es->cred, certfile, certkey, GNUTLS_OPENPGP_FMT_BASE64);
359
290
if (ret != GNUTLS_E_SUCCESS) {
361
"Error[%d] while reading the OpenPGP key pair ('%s',"
362
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
363
fprintf(stdout, "The GnuTLS error is: %s\n",
292
(stderr, "Error[%d] while reading the OpenPGP key pair ('%s',"
294
ret, certfile, certkey);
295
fprintf(stdout, "The Error is: %s\n",
364
296
safer_gnutls_strerror(ret));
368
/* GnuTLS server initialization */
369
ret = gnutls_dh_params_init(&mc->dh_params);
370
if (ret != GNUTLS_E_SUCCESS) {
371
fprintf (stderr, "Error in GnuTLS DH parameter initialization:"
372
" %s\n", safer_gnutls_strerror(ret));
375
ret = gnutls_dh_params_generate2(mc->dh_params, mc->dh_bits);
376
if (ret != GNUTLS_E_SUCCESS) {
377
fprintf (stderr, "Error in GnuTLS prime generation: %s\n",
378
safer_gnutls_strerror(ret));
382
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
388
gnutls_certificate_free_credentials(mc->cred);
389
gnutls_global_deinit();
394
static int init_gnutls_session(mandos_context *mc,
395
gnutls_session_t *session){
397
/* GnuTLS session creation */
398
ret = gnutls_init(session, GNUTLS_SERVER);
399
if (ret != GNUTLS_E_SUCCESS){
300
//GnuTLS server initialization
301
if ((ret = gnutls_dh_params_init (&es->dh_params))
302
!= GNUTLS_E_SUCCESS) {
303
fprintf (stderr, "Error in dh parameter initialization: %s\n",
304
safer_gnutls_strerror(ret));
308
if ((ret = gnutls_dh_params_generate2 (es->dh_params, DH_BITS))
309
!= GNUTLS_E_SUCCESS) {
310
fprintf (stderr, "Error in prime generation: %s\n",
311
safer_gnutls_strerror(ret));
315
gnutls_certificate_set_dh_params (es->cred, es->dh_params);
317
// GnuTLS session creation
318
if ((ret = gnutls_init (&es->session, GNUTLS_SERVER))
319
!= GNUTLS_E_SUCCESS){
400
320
fprintf(stderr, "Error in GnuTLS session initialization: %s\n",
401
321
safer_gnutls_strerror(ret));
406
ret = gnutls_priority_set_direct(*session, mc->priority, &err);
407
if (ret != GNUTLS_E_SUCCESS) {
408
fprintf(stderr, "Syntax error at: %s\n", err);
409
fprintf(stderr, "GnuTLS error: %s\n",
410
safer_gnutls_strerror(ret));
411
gnutls_deinit (*session);
324
if ((ret = gnutls_priority_set_direct (es->session, "NORMAL", &err))
325
!= GNUTLS_E_SUCCESS) {
326
fprintf(stderr, "Syntax error at: %s\n", err);
327
fprintf(stderr, "GnuTLS error: %s\n",
328
safer_gnutls_strerror(ret));
416
ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,
418
if (ret != GNUTLS_E_SUCCESS) {
419
fprintf(stderr, "Error setting GnuTLS credentials: %s\n",
332
if ((ret = gnutls_credentials_set
333
(es->session, GNUTLS_CRD_CERTIFICATE, es->cred))
334
!= GNUTLS_E_SUCCESS) {
335
fprintf(stderr, "Error setting a credentials set: %s\n",
420
336
safer_gnutls_strerror(ret));
421
gnutls_deinit (*session);
425
340
/* ignore client certificate if any. */
426
gnutls_certificate_server_set_request (*session,
341
gnutls_certificate_server_set_request (es->session,
427
342
GNUTLS_CERT_IGNORE);
429
gnutls_dh_set_prime_bits (*session, mc->dh_bits);
344
gnutls_dh_set_prime_bits (es->session, DH_BITS);
434
/* Avahi log function callback */
435
static void empty_log(__attribute__((unused)) AvahiLogLevel level,
436
__attribute__((unused)) const char *txt){}
349
void empty_log(__attribute__((unused)) AvahiLogLevel level,
350
__attribute__((unused)) const char *txt){}
438
/* Called when a Mandos server is found */
439
static int start_mandos_communication(const char *ip, uint16_t port,
440
AvahiIfIndex if_index,
352
int start_mandos_communication(const char *ip, uint16_t port,
353
unsigned int if_index){
443
union { struct sockaddr in; struct sockaddr_in6 in6; } to;
355
struct sockaddr_in6 to;
356
encrypted_session es;
444
357
char *buffer = NULL;
445
358
char *decrypted_buffer;
446
359
size_t buffer_length = 0;
447
360
size_t buffer_capacity = 0;
448
361
ssize_t decrypted_buffer_size;
451
364
char interface[IF_NAMESIZE];
452
gnutls_session_t session;
454
ret = init_gnutls_session (mc, &session);
460
fprintf(stderr, "Setting up a tcp connection to %s, port %" PRIu16
367
fprintf(stderr, "Setting up a tcp connection to %s\n", ip);
464
370
tcp_sd = socket(PF_INET6, SOCK_STREAM, 0);
466
372
perror("socket");
471
if(if_indextoname((unsigned int)if_index, interface) == NULL){
376
if(if_indextoname(if_index, interface) == NULL){
472
378
perror("if_indextoname");
475
384
fprintf(stderr, "Binding to interface %s\n", interface);
478
memset(&to, 0, sizeof(to));
479
to.in6.sin6_family = AF_INET6;
480
/* It would be nice to have a way to detect if we were passed an
481
IPv4 address here. Now we assume an IPv6 address. */
482
ret = inet_pton(AF_INET6, ip, &to.in6.sin6_addr);
387
memset(&to,0,sizeof(to)); /* Spurious warning */
388
to.sin6_family = AF_INET6;
389
ret = inet_pton(AF_INET6, ip, &to.sin6_addr);
484
391
perror("inet_pton");
488
395
fprintf(stderr, "Bad address: %s\n", ip);
491
to.in6.sin6_port = htons(port); /* Spurious warning */
398
to.sin6_port = htons(port); /* Spurious warning */
493
to.in6.sin6_scope_id = (uint32_t)if_index;
400
to.sin6_scope_id = (uint32_t)if_index;
496
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
498
char addrstr[INET6_ADDRSTRLEN] = "";
499
if(inet_ntop(to.in6.sin6_family, &(to.in6.sin6_addr), addrstr,
500
sizeof(addrstr)) == NULL){
503
if(strcmp(addrstr, ip) != 0){
504
fprintf(stderr, "Canonical address form: %s\n", addrstr);
403
fprintf(stderr, "Connection to: %s\n", ip);
509
ret = connect(tcp_sd, &to.in, sizeof(to));
406
ret = connect(tcp_sd, (struct sockaddr *) &to, sizeof(to));
511
408
perror("connect");
515
const char *out = mandos_protocol_version;
518
size_t out_size = strlen(out);
519
ret = TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
520
out_size - written));
526
written += (size_t)ret;
527
if(written < out_size){
530
if (out == mandos_protocol_version){
412
ret = initgnutls (&es);
418
gnutls_transport_set_ptr (es.session,
419
(gnutls_transport_ptr_t) tcp_sd);
540
422
fprintf(stderr, "Establishing TLS session with %s\n", ip);
543
gnutls_transport_set_ptr (session, (gnutls_transport_ptr_t) tcp_sd);
546
ret = gnutls_handshake (session);
547
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
425
ret = gnutls_handshake (es.session);
549
427
if (ret != GNUTLS_E_SUCCESS){
551
fprintf(stderr, "*** GnuTLS Handshake failed ***\n");
429
fprintf(stderr, "\n*** Handshake failed ***\n");
552
430
gnutls_perror (ret);
558
/* Read OpenPGP packet that contains the wanted password */
436
//Retrieve OpenPGP packet that contains the wanted password
561
439
fprintf(stderr, "Retrieving pgp encrypted password from %s\n",
681
559
char ip[AVAHI_ADDRESS_STR_MAX];
682
560
avahi_address_snprint(ip, sizeof(ip), address);
684
fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %"
685
PRIu16 ") on port %d\n", name, host_name, ip,
562
fprintf(stderr, "Mandos server \"%s\" found on %s (%s) on"
563
" port %d\n", name, host_name, ip, port);
688
int ret = start_mandos_communication(ip, port, interface, mc);
565
int ret = start_mandos_communication(ip, port,
566
(unsigned int) interface);
690
avahi_simple_poll_quit(mc->simple_poll);
694
572
avahi_s_service_resolver_free(r);
697
static void browse_callback( AvahiSServiceBrowser *b,
698
AvahiIfIndex interface,
699
AvahiProtocol protocol,
700
AvahiBrowserEvent event,
704
AVAHI_GCC_UNUSED AvahiLookupResultFlags
707
mandos_context *mc = userdata;
710
/* Called whenever a new services becomes available on the LAN or
711
is removed from the LAN */
715
case AVAHI_BROWSER_FAILURE:
717
fprintf(stderr, "(Avahi browser) %s\n",
718
avahi_strerror(avahi_server_errno(mc->server)));
719
avahi_simple_poll_quit(mc->simple_poll);
722
case AVAHI_BROWSER_NEW:
723
/* We ignore the returned Avahi resolver object. In the callback
724
function we free it. If the Avahi server is terminated before
725
the callback function is called the Avahi server will free the
728
if (!(avahi_s_service_resolver_new(mc->server, interface,
729
protocol, name, type, domain,
730
AVAHI_PROTO_INET6, 0,
731
resolve_callback, mc)))
732
fprintf(stderr, "Avahi: Failed to resolve service '%s': %s\n",
733
name, avahi_strerror(avahi_server_errno(mc->server)));
736
case AVAHI_BROWSER_REMOVE:
739
case AVAHI_BROWSER_ALL_FOR_NOW:
740
case AVAHI_BROWSER_CACHE_EXHAUSTED:
742
fprintf(stderr, "No Mandos server found, still searching...\n");
575
static void browse_callback(
576
AvahiSServiceBrowser *b,
577
AvahiIfIndex interface,
578
AvahiProtocol protocol,
579
AvahiBrowserEvent event,
583
AVAHI_GCC_UNUSED AvahiLookupResultFlags flags,
586
AvahiServer *s = userdata;
587
assert(b); /* Spurious warning */
589
/* Called whenever a new services becomes available on the LAN or
590
is removed from the LAN */
594
case AVAHI_BROWSER_FAILURE:
596
fprintf(stderr, "(Browser) %s\n",
597
avahi_strerror(avahi_server_errno(server)));
598
avahi_simple_poll_quit(simple_poll);
601
case AVAHI_BROWSER_NEW:
602
/* We ignore the returned resolver object. In the callback
603
function we free it. If the server is terminated before
604
the callback function is called the server will free
605
the resolver for us. */
607
if (!(avahi_s_service_resolver_new(s, interface, protocol, name,
609
AVAHI_PROTO_INET6, 0,
610
resolve_callback, s)))
611
fprintf(stderr, "Failed to resolve service '%s': %s\n", name,
612
avahi_strerror(avahi_server_errno(s)));
615
case AVAHI_BROWSER_REMOVE:
618
case AVAHI_BROWSER_ALL_FOR_NOW:
619
case AVAHI_BROWSER_CACHE_EXHAUSTED:
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){
624
/* combinds file name and path and returns the malloced new string. som sane checks could/should be added */
625
const char *combinepath(const char *first, const char *second){
752
int ret = asprintf(&tmp, "%s/%s", first, second);
627
tmp = malloc(strlen(first) + strlen(second) + 2);
633
if (first[0] != '\0' and first[strlen(first) - 1] != '/'){
760
int main(int argc, char *argv[]){
641
int main(AVAHI_GCC_UNUSED int argc, AVAHI_GCC_UNUSED char*argv[]) {
642
AvahiServerConfig config;
761
643
AvahiSServiceBrowser *sb = NULL;
764
int exitcode = EXIT_SUCCESS;
646
int returncode = EXIT_SUCCESS;
765
647
const char *interface = "eth0";
766
struct ifreq network;
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;
781
struct argp_option options[] = {
782
{ .name = "debug", .key = 128,
783
.doc = "Debug mode", .group = 3 },
784
{ .name = "connect", .key = 'c',
786
.doc = "Connect directly to a sepcified mandos server",
788
{ .name = "interface", .key = 'i',
790
.doc = "Interface that Avahi will conntect through",
792
{ .name = "keydir", .key = 'd',
794
.doc = "Directory where the openpgp keyring is",
796
{ .name = "seckey", .key = 's',
798
.doc = "Secret openpgp key for gnutls authentication",
800
{ .name = "pubkey", .key = 'p',
802
.doc = "Public openpgp key for gnutls authentication",
804
{ .name = "dh-bits", .key = 129,
806
.doc = "dh-bits to use in gnutls communication",
808
{ .name = "priority", .key = 130,
810
.doc = "GNUTLS priority", .group = 1 },
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. */
840
mc.dh_bits = (unsigned int) strtol(arg, NULL, 10);
854
return ARGP_ERR_UNKNOWN;
859
struct argp argp = { .options = options, .parser = parse_opt,
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;
871
pubkeyfilename = combinepath(keydir, pubkeyname);
872
if (pubkeyfilename == NULL){
873
perror("combinepath");
874
exitcode = EXIT_FAILURE;
878
seckeyfilename = combinepath(keydir, seckeyname);
879
if (seckeyfilename == NULL){
880
perror("combinepath");
881
exitcode = EXIT_FAILURE;
885
ret = init_gnutls_global(&mc, pubkeyfilename, seckeyfilename);
887
fprintf(stderr, "init_gnutls_global failed\n");
888
exitcode = EXIT_FAILURE;
891
gnutls_initalized = true;
894
/* If the interface is down, bring it up */
896
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
899
exitcode = EXIT_FAILURE;
902
strcpy(network.ifr_name, interface);
903
ret = ioctl(sd, SIOCGIFFLAGS, &network);
905
perror("ioctl SIOCGIFFLAGS");
906
exitcode = EXIT_FAILURE;
909
if((network.ifr_flags & IFF_UP) == 0){
910
network.ifr_flags |= IFF_UP;
911
ret = ioctl(sd, SIOCSIFFLAGS, &network);
913
perror("ioctl SIOCSIFFLAGS");
914
exitcode = EXIT_FAILURE;
934
if_index = (AvahiIfIndex) if_nametoindex(interface);
936
fprintf(stderr, "No such interface: \"%s\"\n", interface);
940
if(connect_to != NULL){
941
/* Connect directly, do not use Zeroconf */
942
/* (Mainly meant for debugging) */
943
char *address = strrchr(connect_to, ':');
945
fprintf(stderr, "No colon in address\n");
946
exitcode = EXIT_FAILURE;
950
uint16_t port = (uint16_t) strtol(address+1, NULL, 10);
952
perror("Bad port number");
953
exitcode = EXIT_FAILURE;
957
address = connect_to;
958
ret = start_mandos_communication(address, port, if_index, &mc);
960
exitcode = EXIT_FAILURE;
962
exitcode = EXIT_SUCCESS;
650
static struct option long_options[] = {
651
{"debug", no_argument, (int *)&debug, 1},
652
{"interface", required_argument, 0, 'i'},
653
{"certdir", required_argument, 0, 'd'},
654
{"certkey", required_argument, 0, 'c'},
655
{"certfile", required_argument, 0, 'k'},
658
int option_index = 0;
659
ret = getopt_long (argc, argv, "i:", long_options,
686
certfile = combinepath(certdir, certfile);
687
if (certfile == NULL){
691
certkey = combinepath(certdir, certkey);
692
if (certkey == NULL){
968
697
avahi_set_log_function(empty_log);
971
/* Initialize the pseudo-RNG for Avahi */
700
/* Initialize the psuedo-RNG */
972
701
srand((unsigned int) time(NULL));
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"
979
exitcode = EXIT_FAILURE;
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;
992
/* Allocate a new server */
993
mc.server = avahi_server_new(avahi_simple_poll_get
994
(mc.simple_poll), &config, NULL,
997
/* Free the Avahi configuration data */
998
avahi_server_config_free(&config);
1001
/* Check if creating the Avahi server object succeeded */
1002
if (mc.server == NULL) {
1003
fprintf(stderr, "Failed to create Avahi server: %s\n",
703
/* Allocate main loop object */
704
if (!(simple_poll = avahi_simple_poll_new())) {
705
fprintf(stderr, "Failed to create simple poll object.\n");
710
/* Do not publish any local records */
711
avahi_server_config_init(&config);
712
config.publish_hinfo = 0;
713
config.publish_addresses = 0;
714
config.publish_workstation = 0;
715
config.publish_domain = 0;
717
/* Allocate a new server */
718
server = avahi_server_new(avahi_simple_poll_get(simple_poll),
719
&config, NULL, NULL, &error);
721
/* Free the configuration data */
722
avahi_server_config_free(&config);
724
/* Check if creating the server object succeeded */
726
fprintf(stderr, "Failed to create server: %s\n",
1004
727
avahi_strerror(error));
1005
exitcode = EXIT_FAILURE;
728
returncode = EXIT_FAILURE;
1009
/* Create the Avahi service browser */
1010
sb = avahi_s_service_browser_new(mc.server, if_index,
732
/* Create the service browser */
733
sb = avahi_s_service_browser_new(server,
735
if_nametoindex(interface),
1011
736
AVAHI_PROTO_INET6,
1012
737
"_mandos._tcp", NULL, 0,
1013
browse_callback, &mc);
738
browse_callback, server);
1015
740
fprintf(stderr, "Failed to create service browser: %s\n",
1016
avahi_strerror(avahi_server_errno(mc.server)));
1017
exitcode = EXIT_FAILURE;
741
avahi_strerror(avahi_server_errno(server)));
742
returncode = EXIT_FAILURE;
1021
746
/* Run the main loop */
1024
fprintf(stderr, "Starting Avahi loop search\n");
749
fprintf(stderr, "Starting avahi loop search\n");
1027
avahi_simple_poll_loop(mc.simple_poll);
752
avahi_simple_poll_loop(simple_poll);
1032
757
fprintf(stderr, "%s exiting\n", argv[0]);
1035
760
/* Cleanup things */
1037
762
avahi_s_service_browser_free(sb);
1039
if (mc.server != NULL)
1040
avahi_server_free(mc.server);
1042
if (mc.simple_poll != NULL)
1043
avahi_simple_poll_free(mc.simple_poll);
1044
free(pubkeyfilename);
1045
free(seckeyfilename);
1047
if (gnutls_initalized){
1048
gnutls_certificate_free_credentials(mc.cred);
1049
gnutls_global_deinit ();
765
avahi_server_free(server);
768
avahi_simple_poll_free(simple_poll);