25
25
* along with this program. If not, see
26
26
* <http://www.gnu.org/licenses/>.
28
* Contact the authors at <https://www.fukt.bsnet.se/~belorn/> and
29
* <https://www.fukt.bsnet.se/~teddy/>.
28
* Contact the authors at <mandos@fukt.bsnet.se>.
32
31
/* Needed by GPGME, specifically gpgme_data_seek() */
33
32
#define _LARGEFILE_SOURCE
34
33
#define _FILE_OFFSET_BITS 64
40
#include <net/if.h> /* if_nametoindex */
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
42
76
#include <avahi-core/core.h>
43
77
#include <avahi-core/lookup.h>
44
78
#include <avahi-core/log.h>
46
80
#include <avahi-common/malloc.h>
47
81
#include <avahi-common/error.h>
50
#include <sys/types.h> /* socket(), inet_pton() */
51
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
52
struct in6_addr, inet_pton() */
53
#include <gnutls/gnutls.h> /* All GnuTLS stuff */
54
#include <gnutls/openpgp.h> /* GnuTLS with openpgp stuff */
56
#include <unistd.h> /* close() */
57
#include <netinet/in.h>
58
#include <stdbool.h> /* true */
59
#include <string.h> /* memset */
60
#include <arpa/inet.h> /* inet_pton() */
61
#include <iso646.h> /* not */
64
#include <errno.h> /* perror() */
71
#define CERT_ROOT "/conf/conf.d/cryptkeyreq/"
73
#define CERTFILE CERT_ROOT "openpgp-client.txt"
74
#define KEYFILE CERT_ROOT "openpgp-client-key.txt"
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,
75
99
#define BUFFER_SIZE 256
78
101
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 */
81
gnutls_session_t session;
109
AvahiSimplePoll *simple_poll;
82
111
gnutls_certificate_credentials_t cred;
112
unsigned int dh_bits;
83
113
gnutls_dh_params_t dh_params;
87
ssize_t pgp_packet_decrypt (char *packet, size_t packet_size,
88
char **new_packet, const char *homedir){
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){
89
142
gpgme_data_t dh_crypto, dh_plain;
93
ssize_t new_packet_capacity = 0;
94
ssize_t new_packet_length = 0;
146
size_t plaintext_capacity = 0;
147
ssize_t plaintext_length = 0;
95
148
gpgme_engine_info_t engine_info;
98
fprintf(stderr, "Trying to decrypt OpenPGP packet\n");
151
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
102
155
gpgme_check_version(NULL);
103
gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
156
rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
157
if (rc != GPG_ERR_NO_ERROR){
158
fprintf(stderr, "bad gpgme_engine_check_version: %s: %s\n",
159
gpgme_strsource(rc), gpgme_strerror(rc));
105
/* Set GPGME home directory */
163
/* Set GPGME home directory for the OpenPGP engine only */
106
164
rc = gpgme_get_engine_info (&engine_info);
107
165
if (rc != GPG_ERR_NO_ERROR){
108
166
fprintf(stderr, "bad gpgme_get_engine_info: %s: %s\n",
191
/* Delete the GPGME FILE pointer cryptotext data buffer */
192
gpgme_data_release(dh_crypto);
194
253
/* Seek back to the beginning of the GPGME plaintext data buffer */
195
gpgme_data_seek(dh_plain, (off_t) 0, SEEK_SET);
254
if (gpgme_data_seek(dh_plain, (off_t) 0, SEEK_SET) == -1){
255
perror("pgpme_data_seek");
256
plaintext_length = -1;
199
if (new_packet_length + BUFFER_SIZE > new_packet_capacity){
200
*new_packet = realloc(*new_packet,
201
(unsigned int)new_packet_capacity
203
if (*new_packet == NULL){
207
new_packet_capacity += BUFFER_SIZE;
262
plaintext_capacity = adjustbuffer(plaintext,
263
(size_t)plaintext_length,
265
if (plaintext_capacity == 0){
266
perror("adjustbuffer");
267
plaintext_length = -1;
210
ret = gpgme_data_read(dh_plain, *new_packet + new_packet_length,
271
ret = gpgme_data_read(dh_plain, *plaintext + plaintext_length,
212
273
/* Print the data, if any */
217
279
perror("gpgme_data_read");
280
plaintext_length = -1;
220
new_packet_length += ret;
283
plaintext_length += ret;
223
/* FIXME: check characters before printing to screen so to not print
224
terminal control characters */
226
/* fprintf(stderr, "decrypted password is: "); */
227
/* fwrite(*new_packet, 1, new_packet_length, stderr); */
228
/* fprintf(stderr, "\n"); */
287
fprintf(stderr, "Decrypted password is: ");
288
for(ssize_t i = 0; i < plaintext_length; i++){
289
fprintf(stderr, "%02hhX ", (*plaintext)[i]);
291
fprintf(stderr, "\n");
296
/* Delete the GPGME cryptotext data buffer */
297
gpgme_data_release(dh_crypto);
231
299
/* Delete the GPGME plaintext data buffer */
232
300
gpgme_data_release(dh_plain);
233
return new_packet_length;
301
return plaintext_length;
236
304
static const char * safer_gnutls_strerror (int value) {
237
const char *ret = gnutls_strerror (value);
305
const char *ret = gnutls_strerror (value); /* Spurious warning */
239
307
ret = "(unknown)";
243
void debuggnutls(__attribute__((unused)) int level,
245
fprintf(stderr, "%s", string);
311
/* GnuTLS log function callback */
312
static void debuggnutls(__attribute__((unused)) int level,
314
fprintf(stderr, "GnuTLS: %s", string);
248
int initgnutls(encrypted_session *es){
317
static int init_gnutls_global(mandos_context *mc,
318
const char *pubkeyfilename,
319
const char *seckeyfilename){
253
323
fprintf(stderr, "Initializing GnuTLS\n");
256
if ((ret = gnutls_global_init ())
257
!= GNUTLS_E_SUCCESS) {
258
fprintf (stderr, "global_init: %s\n", safer_gnutls_strerror(ret));
326
ret = gnutls_global_init();
327
if (ret != GNUTLS_E_SUCCESS) {
328
fprintf (stderr, "GnuTLS global_init: %s\n",
329
safer_gnutls_strerror(ret));
334
/* "Use a log level over 10 to enable all debugging options."
263
337
gnutls_global_set_log_level(11);
264
338
gnutls_global_set_log_function(debuggnutls);
267
/* openpgp credentials */
268
if ((ret = gnutls_certificate_allocate_credentials (&es->cred))
269
!= GNUTLS_E_SUCCESS) {
270
fprintf (stderr, "memory error: %s\n",
341
/* OpenPGP credentials */
342
gnutls_certificate_allocate_credentials(&mc->cred);
343
if (ret != GNUTLS_E_SUCCESS){
344
fprintf (stderr, "GnuTLS memory error: %s\n", /* Spurious
271
346
safer_gnutls_strerror(ret));
347
gnutls_global_deinit ();
276
352
fprintf(stderr, "Attempting to use OpenPGP certificate %s"
277
" and keyfile %s as GnuTLS credentials\n", CERTFILE,
353
" and keyfile %s as GnuTLS credentials\n", pubkeyfilename,
281
357
ret = gnutls_certificate_set_openpgp_key_file
282
(es->cred, CERTFILE, KEYFILE, GNUTLS_OPENPGP_FMT_BASE64);
358
(mc->cred, pubkeyfilename, seckeyfilename,
359
GNUTLS_OPENPGP_FMT_BASE64);
283
360
if (ret != GNUTLS_E_SUCCESS) {
285
(stderr, "Error[%d] while reading the OpenPGP key pair ('%s',"
287
ret, CERTFILE, KEYFILE);
288
fprintf(stdout, "The Error is: %s\n",
362
"Error[%d] while reading the OpenPGP key pair ('%s',"
363
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
364
fprintf(stdout, "The GnuTLS error is: %s\n",
289
365
safer_gnutls_strerror(ret));
293
//GnuTLS server initialization
294
if ((ret = gnutls_dh_params_init (&es->dh_params))
295
!= GNUTLS_E_SUCCESS) {
296
fprintf (stderr, "Error in dh parameter initialization: %s\n",
297
safer_gnutls_strerror(ret));
301
if ((ret = gnutls_dh_params_generate2 (es->dh_params, DH_BITS))
302
!= GNUTLS_E_SUCCESS) {
303
fprintf (stderr, "Error in prime generation: %s\n",
304
safer_gnutls_strerror(ret));
308
gnutls_certificate_set_dh_params (es->cred, es->dh_params);
310
// GnuTLS session creation
311
if ((ret = gnutls_init (&es->session, GNUTLS_SERVER))
312
!= GNUTLS_E_SUCCESS){
369
/* GnuTLS server initialization */
370
ret = gnutls_dh_params_init(&mc->dh_params);
371
if (ret != GNUTLS_E_SUCCESS) {
372
fprintf (stderr, "Error in GnuTLS DH parameter initialization:"
373
" %s\n", safer_gnutls_strerror(ret));
376
ret = gnutls_dh_params_generate2(mc->dh_params, mc->dh_bits);
377
if (ret != GNUTLS_E_SUCCESS) {
378
fprintf (stderr, "Error in GnuTLS prime generation: %s\n",
379
safer_gnutls_strerror(ret));
383
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
389
gnutls_certificate_free_credentials(mc->cred);
390
gnutls_global_deinit();
395
static int init_gnutls_session(mandos_context *mc,
396
gnutls_session_t *session){
398
/* GnuTLS session creation */
399
ret = gnutls_init(session, GNUTLS_SERVER);
400
if (ret != GNUTLS_E_SUCCESS){
313
401
fprintf(stderr, "Error in GnuTLS session initialization: %s\n",
314
402
safer_gnutls_strerror(ret));
317
if ((ret = gnutls_priority_set_direct (es->session, "NORMAL", &err))
318
!= GNUTLS_E_SUCCESS) {
319
fprintf(stderr, "Syntax error at: %s\n", err);
320
fprintf(stderr, "GnuTLS error: %s\n",
321
safer_gnutls_strerror(ret));
407
ret = gnutls_priority_set_direct(*session, mc->priority, &err);
408
if (ret != GNUTLS_E_SUCCESS) {
409
fprintf(stderr, "Syntax error at: %s\n", err);
410
fprintf(stderr, "GnuTLS error: %s\n",
411
safer_gnutls_strerror(ret));
412
gnutls_deinit (*session);
325
if ((ret = gnutls_credentials_set
326
(es->session, GNUTLS_CRD_CERTIFICATE, es->cred))
327
!= GNUTLS_E_SUCCESS) {
328
fprintf(stderr, "Error setting a credentials set: %s\n",
417
ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,
419
if (ret != GNUTLS_E_SUCCESS) {
420
fprintf(stderr, "Error setting GnuTLS credentials: %s\n",
329
421
safer_gnutls_strerror(ret));
422
gnutls_deinit (*session);
333
426
/* ignore client certificate if any. */
334
gnutls_certificate_server_set_request (es->session,
427
gnutls_certificate_server_set_request (*session,
335
428
GNUTLS_CERT_IGNORE);
337
gnutls_dh_set_prime_bits (es->session, DH_BITS);
430
gnutls_dh_set_prime_bits (*session, mc->dh_bits);
342
void empty_log(__attribute__((unused)) AvahiLogLevel level,
343
__attribute__((unused)) const char *txt){}
435
/* Avahi log function callback */
436
static void empty_log(__attribute__((unused)) AvahiLogLevel level,
437
__attribute__((unused)) const char *txt){}
345
int start_mandos_communication(const char *ip, uint16_t port,
346
unsigned int if_index){
439
/* Called when a Mandos server is found */
440
static int start_mandos_communication(const char *ip, uint16_t port,
441
AvahiIfIndex if_index,
348
struct sockaddr_in6 to;
349
encrypted_session es;
444
union { struct sockaddr in; struct sockaddr_in6 in6; } to;
350
445
char *buffer = NULL;
351
446
char *decrypted_buffer;
352
447
size_t buffer_length = 0;
353
448
size_t buffer_capacity = 0;
354
449
ssize_t decrypted_buffer_size;
357
452
char interface[IF_NAMESIZE];
453
gnutls_session_t session;
455
ret = init_gnutls_session (mc, &session);
360
fprintf(stderr, "Setting up a tcp connection to %s, port %d\n",
461
fprintf(stderr, "Setting up a tcp connection to %s, port %" PRIu16
364
465
tcp_sd = socket(PF_INET6, SOCK_STREAM, 0);
366
467
perror("socket");
370
if(if_indextoname(if_index, interface) == NULL){
472
if(if_indextoname((unsigned int)if_index, interface) == NULL){
372
473
perror("if_indextoname");
378
476
fprintf(stderr, "Binding to interface %s\n", interface);
381
memset(&to,0,sizeof(to)); /* Spurious warning */
382
to.sin6_family = AF_INET6;
383
ret = inet_pton(AF_INET6, ip, &to.sin6_addr);
479
memset(&to, 0, sizeof(to));
480
to.in6.sin6_family = AF_INET6;
481
/* It would be nice to have a way to detect if we were passed an
482
IPv4 address here. Now we assume an IPv6 address. */
483
ret = inet_pton(AF_INET6, ip, &to.in6.sin6_addr);
385
485
perror("inet_pton");
389
489
fprintf(stderr, "Bad address: %s\n", ip);
392
to.sin6_port = htons(port); /* Spurious warning */
492
to.in6.sin6_port = htons(port); /* Spurious warning */
394
to.sin6_scope_id = (uint32_t)if_index;
494
to.in6.sin6_scope_id = (uint32_t)if_index;
397
fprintf(stderr, "Connection to: %s, port %d\n", ip, port);
398
/* char addrstr[INET6_ADDRSTRLEN]; */
399
/* if(inet_ntop(to.sin6_family, &(to.sin6_addr), addrstr, */
400
/* sizeof(addrstr)) == NULL){ */
401
/* perror("inet_ntop"); */
403
/* fprintf(stderr, "Really connecting to: %s, port %d\n", */
404
/* addrstr, ntohs(to.sin6_port)); */
497
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
499
char addrstr[INET6_ADDRSTRLEN] = "";
500
if(inet_ntop(to.in6.sin6_family, &(to.in6.sin6_addr), addrstr,
501
sizeof(addrstr)) == NULL){
504
if(strcmp(addrstr, ip) != 0){
505
fprintf(stderr, "Canonical address form: %s\n", addrstr);
408
ret = connect(tcp_sd, (struct sockaddr *) &to, sizeof(to));
510
ret = connect(tcp_sd, &to.in, sizeof(to));
410
512
perror("connect");
414
ret = initgnutls (&es);
516
const char *out = mandos_protocol_version;
519
size_t out_size = strlen(out);
520
ret = TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
521
out_size - written));
527
written += (size_t)ret;
528
if(written < out_size){
531
if (out == mandos_protocol_version){
420
gnutls_transport_set_ptr (es.session,
421
(gnutls_transport_ptr_t) tcp_sd);
424
541
fprintf(stderr, "Establishing TLS session with %s\n", ip);
427
ret = gnutls_handshake (es.session);
544
gnutls_transport_set_ptr (session, (gnutls_transport_ptr_t) tcp_sd);
547
ret = gnutls_handshake (session);
548
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
429
550
if (ret != GNUTLS_E_SUCCESS){
431
fprintf(stderr, "\n*** Handshake failed ***\n");
552
fprintf(stderr, "*** GnuTLS Handshake failed ***\n");
432
553
gnutls_perror (ret);
438
//Retrieve OpenPGP packet that contains the wanted password
559
/* Read OpenPGP packet that contains the wanted password */
441
562
fprintf(stderr, "Retrieving pgp encrypted password from %s\n",
561
680
char ip[AVAHI_ADDRESS_STR_MAX];
562
681
avahi_address_snprint(ip, sizeof(ip), address);
564
fprintf(stderr, "Mandos server \"%s\" found on %s (%s) on"
565
" port %d\n", name, host_name, ip, port);
683
fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %"
684
PRIu16 ") on port %d\n", name, host_name, ip,
567
int ret = start_mandos_communication(ip, port,
568
(unsigned int) interface);
687
int ret = start_mandos_communication(ip, port, interface, mc);
689
avahi_simple_poll_quit(mc->simple_poll);
574
693
avahi_s_service_resolver_free(r);
577
static void browse_callback(
578
AvahiSServiceBrowser *b,
579
AvahiIfIndex interface,
580
AvahiProtocol protocol,
581
AvahiBrowserEvent event,
585
AVAHI_GCC_UNUSED AvahiLookupResultFlags flags,
588
AvahiServer *s = userdata;
589
assert(b); /* Spurious warning */
591
/* Called whenever a new services becomes available on the LAN or
592
is removed from the LAN */
596
case AVAHI_BROWSER_FAILURE:
598
fprintf(stderr, "(Browser) %s\n",
599
avahi_strerror(avahi_server_errno(server)));
600
avahi_simple_poll_quit(simple_poll);
603
case AVAHI_BROWSER_NEW:
604
/* We ignore the returned resolver object. In the callback
605
function we free it. If the server is terminated before
606
the callback function is called the server will free
607
the resolver for us. */
609
if (!(avahi_s_service_resolver_new(s, interface, protocol, name,
611
AVAHI_PROTO_INET6, 0,
612
resolve_callback, s)))
613
fprintf(stderr, "Failed to resolve service '%s': %s\n", name,
614
avahi_strerror(avahi_server_errno(s)));
617
case AVAHI_BROWSER_REMOVE:
620
case AVAHI_BROWSER_ALL_FOR_NOW:
621
case AVAHI_BROWSER_CACHE_EXHAUSTED:
696
static void browse_callback( AvahiSServiceBrowser *b,
697
AvahiIfIndex interface,
698
AvahiProtocol protocol,
699
AvahiBrowserEvent event,
703
AVAHI_GCC_UNUSED AvahiLookupResultFlags
706
mandos_context *mc = userdata;
709
/* Called whenever a new services becomes available on the LAN or
710
is removed from the LAN */
714
case AVAHI_BROWSER_FAILURE:
716
fprintf(stderr, "(Avahi browser) %s\n",
717
avahi_strerror(avahi_server_errno(mc->server)));
718
avahi_simple_poll_quit(mc->simple_poll);
721
case AVAHI_BROWSER_NEW:
722
/* We ignore the returned Avahi resolver object. In the callback
723
function we free it. If the Avahi server is terminated before
724
the callback function is called the Avahi server will free the
727
if (!(avahi_s_service_resolver_new(mc->server, interface,
728
protocol, name, type, domain,
729
AVAHI_PROTO_INET6, 0,
730
resolve_callback, mc)))
731
fprintf(stderr, "Avahi: Failed to resolve service '%s': %s\n",
732
name, avahi_strerror(avahi_server_errno(mc->server)));
735
case AVAHI_BROWSER_REMOVE:
738
case AVAHI_BROWSER_ALL_FOR_NOW:
739
case AVAHI_BROWSER_CACHE_EXHAUSTED:
741
fprintf(stderr, "No Mandos server found, still searching...\n");
626
int main(AVAHI_GCC_UNUSED int argc, AVAHI_GCC_UNUSED char*argv[]) {
627
AvahiServerConfig config;
747
/* Combines file name and path and returns the malloced new
748
string. some sane checks could/should be added */
749
static char *combinepath(const char *first, const char *second){
751
int ret = asprintf(&tmp, "%s/%s", first, second);
759
int main(int argc, char *argv[]){
628
760
AvahiSServiceBrowser *sb = NULL;
631
int returncode = EXIT_SUCCESS;
763
int exitcode = EXIT_SUCCESS;
632
764
const char *interface = "eth0";
633
unsigned int if_index;
765
struct ifreq network;
634
769
char *connect_to = NULL;
637
static struct option long_options[] = {
638
{"debug", no_argument, (int *)&debug, 1},
639
{"connect", required_argument, 0, 'c'},
640
{"interface", required_argument, 0, 'i'},
643
int option_index = 0;
644
ret = getopt_long (argc, argv, "i:", long_options,
665
if_index = if_nametoindex(interface);
770
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
771
char *pubkeyfilename = NULL;
772
char *seckeyfilename = NULL;
773
const char *pubkeyname = "pubkey.txt";
774
const char *seckeyname = "seckey.txt";
775
mandos_context mc = { .simple_poll = NULL, .server = NULL,
776
.dh_bits = 1024, .priority = "SECURE256"};
777
bool gnutls_initalized = false;
780
struct argp_option options[] = {
781
{ .name = "debug", .key = 128,
782
.doc = "Debug mode", .group = 3 },
783
{ .name = "connect", .key = 'c',
785
.doc = "Connect directly to a sepcified mandos server",
787
{ .name = "interface", .key = 'i',
789
.doc = "Interface that Avahi will conntect through",
791
{ .name = "keydir", .key = 'd',
793
.doc = "Directory where the openpgp keyring is",
795
{ .name = "seckey", .key = 's',
797
.doc = "Secret openpgp key for gnutls authentication",
799
{ .name = "pubkey", .key = 'p',
801
.doc = "Public openpgp key for gnutls authentication",
803
{ .name = "dh-bits", .key = 129,
805
.doc = "dh-bits to use in gnutls communication",
807
{ .name = "priority", .key = 130,
809
.doc = "GNUTLS priority", .group = 1 },
814
error_t parse_opt (int key, char *arg,
815
struct argp_state *state) {
816
/* Get the INPUT argument from `argp_parse', which we know is
817
a pointer to our plugin list pointer. */
839
mc.dh_bits = (unsigned int) strtol(arg, NULL, 10);
853
return ARGP_ERR_UNKNOWN;
858
struct argp argp = { .options = options, .parser = parse_opt,
860
.doc = "Mandos client -- Get and decrypt"
861
" passwords from mandos server" };
862
ret = argp_parse (&argp, argc, argv, 0, 0, NULL);
863
if (ret == ARGP_ERR_UNKNOWN){
864
fprintf(stderr, "Unknown error while parsing arguments\n");
865
exitcode = EXIT_FAILURE;
870
pubkeyfilename = combinepath(keydir, pubkeyname);
871
if (pubkeyfilename == NULL){
872
perror("combinepath");
873
exitcode = EXIT_FAILURE;
877
seckeyfilename = combinepath(keydir, seckeyname);
878
if (seckeyfilename == NULL){
879
perror("combinepath");
880
exitcode = EXIT_FAILURE;
884
ret = init_gnutls_global(&mc, pubkeyfilename, seckeyfilename);
886
fprintf(stderr, "init_gnutls_global failed\n");
887
exitcode = EXIT_FAILURE;
890
gnutls_initalized = true;
893
/* If the interface is down, bring it up */
895
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
898
exitcode = EXIT_FAILURE;
901
strcpy(network.ifr_name, interface);
902
ret = ioctl(sd, SIOCGIFFLAGS, &network);
904
perror("ioctl SIOCGIFFLAGS");
905
exitcode = EXIT_FAILURE;
908
if((network.ifr_flags & IFF_UP) == 0){
909
network.ifr_flags |= IFF_UP;
910
ret = ioctl(sd, SIOCSIFFLAGS, &network);
912
perror("ioctl SIOCSIFFLAGS");
913
exitcode = EXIT_FAILURE;
933
if_index = (AvahiIfIndex) if_nametoindex(interface);
666
934
if(if_index == 0){
667
935
fprintf(stderr, "No such interface: \"%s\"\n", interface);
668
936
exit(EXIT_FAILURE);
674
942
char *address = strrchr(connect_to, ':');
675
943
if(address == NULL){
676
944
fprintf(stderr, "No colon in address\n");
945
exitcode = EXIT_FAILURE;
680
949
uint16_t port = (uint16_t) strtol(address+1, NULL, 10);
682
951
perror("Bad port number");
952
exitcode = EXIT_FAILURE;
686
956
address = connect_to;
687
ret = start_mandos_communication(address, port, if_index);
957
ret = start_mandos_communication(address, port, if_index, &mc);
959
exitcode = EXIT_FAILURE;
961
exitcode = EXIT_SUCCESS;
696
967
avahi_set_log_function(empty_log);
699
/* Initialize the psuedo-RNG */
970
/* Initialize the pseudo-RNG for Avahi */
700
971
srand((unsigned int) time(NULL));
702
/* Allocate main loop object */
703
if (!(simple_poll = avahi_simple_poll_new())) {
704
fprintf(stderr, "Failed to create simple poll object.\n");
709
/* Do not publish any local records */
710
avahi_server_config_init(&config);
711
config.publish_hinfo = 0;
712
config.publish_addresses = 0;
713
config.publish_workstation = 0;
714
config.publish_domain = 0;
716
/* Allocate a new server */
717
server = avahi_server_new(avahi_simple_poll_get(simple_poll),
718
&config, NULL, NULL, &error);
720
/* Free the configuration data */
721
avahi_server_config_free(&config);
723
/* Check if creating the server object succeeded */
725
fprintf(stderr, "Failed to create server: %s\n",
973
/* Allocate main Avahi loop object */
974
mc.simple_poll = avahi_simple_poll_new();
975
if (mc.simple_poll == NULL) {
976
fprintf(stderr, "Avahi: Failed to create simple poll"
978
exitcode = EXIT_FAILURE;
983
AvahiServerConfig config;
984
/* Do not publish any local Zeroconf records */
985
avahi_server_config_init(&config);
986
config.publish_hinfo = 0;
987
config.publish_addresses = 0;
988
config.publish_workstation = 0;
989
config.publish_domain = 0;
991
/* Allocate a new server */
992
mc.server = avahi_server_new(avahi_simple_poll_get
993
(mc.simple_poll), &config, NULL,
996
/* Free the Avahi configuration data */
997
avahi_server_config_free(&config);
1000
/* Check if creating the Avahi server object succeeded */
1001
if (mc.server == NULL) {
1002
fprintf(stderr, "Failed to create Avahi server: %s\n",
726
1003
avahi_strerror(error));
727
returncode = EXIT_FAILURE;
1004
exitcode = EXIT_FAILURE;
731
/* Create the service browser */
732
sb = avahi_s_service_browser_new(server, (AvahiIfIndex)if_index,
1008
/* Create the Avahi service browser */
1009
sb = avahi_s_service_browser_new(mc.server, if_index,
733
1010
AVAHI_PROTO_INET6,
734
1011
"_mandos._tcp", NULL, 0,
735
browse_callback, server);
1012
browse_callback, &mc);
737
1014
fprintf(stderr, "Failed to create service browser: %s\n",
738
avahi_strerror(avahi_server_errno(server)));
739
returncode = EXIT_FAILURE;
1015
avahi_strerror(avahi_server_errno(mc.server)));
1016
exitcode = EXIT_FAILURE;
743
1020
/* Run the main loop */
746
fprintf(stderr, "Starting avahi loop search\n");
1023
fprintf(stderr, "Starting Avahi loop search\n");
749
avahi_simple_poll_loop(simple_poll);
1026
avahi_simple_poll_loop(mc.simple_poll);
754
1031
fprintf(stderr, "%s exiting\n", argv[0]);
757
1034
/* Cleanup things */
759
1036
avahi_s_service_browser_free(sb);
762
avahi_server_free(server);
765
avahi_simple_poll_free(simple_poll);
1038
if (mc.server != NULL)
1039
avahi_server_free(mc.server);
1041
if (mc.simple_poll != NULL)
1042
avahi_simple_poll_free(mc.simple_poll);
1043
free(pubkeyfilename);
1044
free(seckeyfilename);
1046
if (gnutls_initalized){
1047
gnutls_certificate_free_credentials(mc.cred);
1048
gnutls_global_deinit ();