32
32
#define _LARGEFILE_SOURCE
33
33
#define _FILE_OFFSET_BITS 64
35
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY() */
37
#include <stdio.h> /* fprintf(), stderr, fwrite(), stdout,
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(), memcpy(), strcpy() */
46
#include <sys/ioctl.h> /* ioctl */
47
#include <net/if.h> /* ifreq, SIOCGIFFLAGS, SIOCSIFFLAGS,
49
#include <sys/types.h> /* socket(), inet_pton(), sockaddr,
50
sockaddr_in6, PF_INET6,
51
SOCK_STREAM, INET6_ADDRSTRLEN,
53
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
54
struct in6_addr, inet_pton(),
56
#include <assert.h> /* assert() */
57
#include <errno.h> /* perror(), errno */
58
#include <time.h> /* time() */
59
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
60
SIOCSIFFLAGS, if_indextoname(),
61
if_nametoindex(), IF_NAMESIZE */
62
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
63
getuid(), getgid(), setuid(),
65
#include <netinet/in.h>
66
#include <arpa/inet.h> /* inet_pton(), htons */
67
#include <iso646.h> /* not, and */
68
#include <argp.h> /* struct argp_option, error_t, struct
69
argp_state, struct argp,
70
argp_parse(), ARGP_KEY_ARG,
71
ARGP_KEY_END, ARGP_ERR_UNKNOWN */
74
/* All Avahi types, constants and functions
39
#include <net/if.h> /* if_nametoindex */
77
41
#include <avahi-core/core.h>
78
42
#include <avahi-core/lookup.h>
79
43
#include <avahi-core/log.h>
81
45
#include <avahi-common/malloc.h>
82
46
#include <avahi-common/error.h>
85
#include <gnutls/gnutls.h> /* All GnuTLS types, constants and functions
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 functions
95
GPGME_PROTOCOL_OpenPGP,
49
#include <sys/types.h> /* socket(), inet_pton() */
50
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
51
struct in6_addr, inet_pton() */
52
#include <gnutls/gnutls.h> /* All GnuTLS stuff */
53
#include <gnutls/openpgp.h> /* GnuTLS with openpgp stuff */
55
#include <unistd.h> /* close() */
56
#include <netinet/in.h>
57
#include <stdbool.h> /* true */
58
#include <string.h> /* memset */
59
#include <arpa/inet.h> /* inet_pton() */
60
#include <iso646.h> /* not */
63
#include <errno.h> /* perror() */
98
69
#define BUFFER_SIZE 256
71
static int dh_bits = 1024;
73
static const char *keydir = "/conf/conf.d/mandos";
74
static const char *pubkeyfile = "pubkey.txt";
75
static const char *seckeyfile = "seckey.txt";
100
77
bool debug = false;
101
static const char *keydir = "/conf/conf.d/mandos";
102
static const char mandos_protocol_version[] = "1";
103
const char *argp_program_version = "mandosclient 1.0";
104
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
106
/* Used for passing in values through the Avahi callback functions */
108
AvahiSimplePoll *simple_poll;
81
gnutls_session_t session;
110
82
gnutls_certificate_credentials_t cred;
111
unsigned int dh_bits;
112
83
gnutls_dh_params_t dh_params;
113
const char *priority;
117
* Make room in "buffer" for at least BUFFER_SIZE additional bytes.
118
* "buffer_capacity" is how much is currently allocated,
119
* "buffer_length" is how much is already used.
121
size_t adjustbuffer(char **buffer, size_t buffer_length,
122
size_t buffer_capacity){
123
if (buffer_length + BUFFER_SIZE > buffer_capacity){
124
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
128
buffer_capacity += BUFFER_SIZE;
130
return buffer_capacity;
134
* Decrypt OpenPGP data using keyrings in HOMEDIR.
135
* Returns -1 on error
137
static ssize_t pgp_packet_decrypt (const char *cryptotext,
87
static ssize_t pgp_packet_decrypt (char *packet, size_t packet_size,
140
89
const char *homedir){
141
90
gpgme_data_t dh_crypto, dh_plain;
145
size_t plaintext_capacity = 0;
146
ssize_t plaintext_length = 0;
94
ssize_t new_packet_capacity = 0;
95
ssize_t new_packet_length = 0;
147
96
gpgme_engine_info_t engine_info;
150
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
99
fprintf(stderr, "Trying to decrypt OpenPGP packet\n");
197
/* Delete the GPGME FILE pointer cryptotext data buffer */
198
gpgme_data_release(dh_crypto);
252
200
/* Seek back to the beginning of the GPGME plaintext data buffer */
253
201
if (gpgme_data_seek(dh_plain, (off_t) 0, SEEK_SET) == -1){
254
202
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;
207
if (new_packet_length + BUFFER_SIZE > new_packet_capacity){
208
*new_packet = realloc(*new_packet,
209
(unsigned int)new_packet_capacity
211
if (*new_packet == NULL){
215
new_packet_capacity += BUFFER_SIZE;
270
ret = gpgme_data_read(dh_plain, *plaintext + plaintext_length,
218
ret = gpgme_data_read(dh_plain, *new_packet + new_packet_length,
272
220
/* Print the data, if any */
278
225
perror("gpgme_data_read");
279
plaintext_length = -1;
282
plaintext_length += ret;
228
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);
231
/* FIXME: check characters before printing to screen so to not print
232
terminal control characters */
234
/* fprintf(stderr, "decrypted password is: "); */
235
/* fwrite(*new_packet, 1, new_packet_length, stderr); */
236
/* fprintf(stderr, "\n"); */
298
239
/* Delete the GPGME plaintext data buffer */
299
240
gpgme_data_release(dh_plain);
300
return plaintext_length;
241
return new_packet_length;
303
244
static const char * safer_gnutls_strerror (int value) {
310
/* GnuTLS log function callback */
311
251
static void debuggnutls(__attribute__((unused)) int level,
312
252
const char* string){
313
fprintf(stderr, "GnuTLS: %s", string);
253
fprintf(stderr, "%s", string);
316
static int init_gnutls_global(mandos_context *mc,
317
const char *pubkeyfile,
318
const char *seckeyfile){
256
static int initgnutls(encrypted_session *es){
322
261
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));
264
if ((ret = gnutls_global_init ())
265
!= GNUTLS_E_SUCCESS) {
266
fprintf (stderr, "global_init: %s\n", safer_gnutls_strerror(ret));
333
/* "Use a log level over 10 to enable all debugging options."
336
271
gnutls_global_set_log_level(11);
337
272
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",
275
/* openpgp credentials */
276
if ((ret = gnutls_certificate_allocate_credentials (&es->cred))
277
!= GNUTLS_E_SUCCESS) {
278
fprintf (stderr, "memory error: %s\n",
344
279
safer_gnutls_strerror(ret));
345
gnutls_global_deinit ();
355
289
ret = gnutls_certificate_set_openpgp_key_file
356
(mc->cred, pubkeyfile, seckeyfile, GNUTLS_OPENPGP_FMT_BASE64);
290
(es->cred, pubkeyfile, seckeyfile, GNUTLS_OPENPGP_FMT_BASE64);
357
291
if (ret != GNUTLS_E_SUCCESS) {
359
"Error[%d] while reading the OpenPGP key pair ('%s',"
360
" '%s')\n", ret, pubkeyfile, seckeyfile);
361
fprintf(stdout, "The GnuTLS error is: %s\n",
293
(stderr, "Error[%d] while reading the OpenPGP key pair ('%s',"
295
ret, pubkeyfile, seckeyfile);
296
fprintf(stdout, "The Error is: %s\n",
362
297
safer_gnutls_strerror(ret));
366
/* GnuTLS server initialization */
367
ret = gnutls_dh_params_init(&mc->dh_params);
368
if (ret != GNUTLS_E_SUCCESS) {
369
fprintf (stderr, "Error in GnuTLS DH parameter initialization:"
370
" %s\n", safer_gnutls_strerror(ret));
373
ret = gnutls_dh_params_generate2(mc->dh_params, mc->dh_bits);
374
if (ret != GNUTLS_E_SUCCESS) {
375
fprintf (stderr, "Error in GnuTLS prime generation: %s\n",
376
safer_gnutls_strerror(ret));
380
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
386
gnutls_certificate_free_credentials(mc->cred);
387
gnutls_global_deinit();
392
static int init_gnutls_session(mandos_context *mc,
393
gnutls_session_t *session){
395
/* GnuTLS session creation */
396
ret = gnutls_init(session, GNUTLS_SERVER);
397
if (ret != GNUTLS_E_SUCCESS){
301
//GnuTLS server initialization
302
if ((ret = gnutls_dh_params_init (&es->dh_params))
303
!= GNUTLS_E_SUCCESS) {
304
fprintf (stderr, "Error in dh parameter initialization: %s\n",
305
safer_gnutls_strerror(ret));
309
if ((ret = gnutls_dh_params_generate2 (es->dh_params, dh_bits))
310
!= GNUTLS_E_SUCCESS) {
311
fprintf (stderr, "Error in prime generation: %s\n",
312
safer_gnutls_strerror(ret));
316
gnutls_certificate_set_dh_params (es->cred, es->dh_params);
318
// GnuTLS session creation
319
if ((ret = gnutls_init (&es->session, GNUTLS_SERVER))
320
!= GNUTLS_E_SUCCESS){
398
321
fprintf(stderr, "Error in GnuTLS session initialization: %s\n",
399
322
safer_gnutls_strerror(ret));
404
ret = gnutls_priority_set_direct(*session, mc->priority, &err);
405
if (ret != GNUTLS_E_SUCCESS) {
406
fprintf(stderr, "Syntax error at: %s\n", err);
407
fprintf(stderr, "GnuTLS error: %s\n",
408
safer_gnutls_strerror(ret));
409
gnutls_deinit (*session);
325
if ((ret = gnutls_priority_set_direct (es->session, "NORMAL", &err))
326
!= GNUTLS_E_SUCCESS) {
327
fprintf(stderr, "Syntax error at: %s\n", err);
328
fprintf(stderr, "GnuTLS error: %s\n",
329
safer_gnutls_strerror(ret));
414
ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,
416
if (ret != GNUTLS_E_SUCCESS) {
417
fprintf(stderr, "Error setting GnuTLS credentials: %s\n",
333
if ((ret = gnutls_credentials_set
334
(es->session, GNUTLS_CRD_CERTIFICATE, es->cred))
335
!= GNUTLS_E_SUCCESS) {
336
fprintf(stderr, "Error setting a credentials set: %s\n",
418
337
safer_gnutls_strerror(ret));
419
gnutls_deinit (*session);
423
341
/* ignore client certificate if any. */
424
gnutls_certificate_server_set_request (*session,
342
gnutls_certificate_server_set_request (es->session,
425
343
GNUTLS_CERT_IGNORE);
427
gnutls_dh_set_prime_bits (*session, mc->dh_bits);
345
gnutls_dh_set_prime_bits (es->session, dh_bits);
432
/* Avahi log function callback */
433
350
static void empty_log(__attribute__((unused)) AvahiLogLevel level,
434
351
__attribute__((unused)) const char *txt){}
436
/* Called when a Mandos server is found */
437
353
static int start_mandos_communication(const char *ip, uint16_t port,
438
AvahiIfIndex if_index,
354
AvahiIfIndex if_index){
441
union { struct sockaddr in; struct sockaddr_in6 in6; } to;
356
struct sockaddr_in6 to;
357
encrypted_session es;
442
358
char *buffer = NULL;
443
359
char *decrypted_buffer;
444
360
size_t buffer_length = 0;
445
361
size_t buffer_capacity = 0;
446
362
ssize_t decrypted_buffer_size;
449
365
char interface[IF_NAMESIZE];
450
gnutls_session_t session;
452
ret = init_gnutls_session (mc, &session);
458
368
fprintf(stderr, "Setting up a tcp connection to %s, port %d\n",
464
374
perror("socket");
469
if(if_indextoname((unsigned int)if_index, interface) == NULL){
378
if(if_indextoname((unsigned int)if_index, interface) == NULL){
470
380
perror("if_indextoname");
473
386
fprintf(stderr, "Binding to interface %s\n", interface);
476
389
memset(&to,0,sizeof(to)); /* Spurious warning */
477
to.in6.sin6_family = AF_INET6;
478
/* It would be nice to have a way to detect if we were passed an
479
IPv4 address here. Now we assume an IPv6 address. */
480
ret = inet_pton(AF_INET6, ip, &to.in6.sin6_addr);
390
to.sin6_family = AF_INET6;
391
ret = inet_pton(AF_INET6, ip, &to.sin6_addr);
482
393
perror("inet_pton");
486
397
fprintf(stderr, "Bad address: %s\n", ip);
489
to.in6.sin6_port = htons(port); /* Spurious warning */
400
to.sin6_port = htons(port); /* Spurious warning */
491
to.in6.sin6_scope_id = (uint32_t)if_index;
402
to.sin6_scope_id = (uint32_t)if_index;
494
405
fprintf(stderr, "Connection to: %s, port %d\n", ip, port);
495
406
char addrstr[INET6_ADDRSTRLEN] = "";
496
if(inet_ntop(to.in6.sin6_family, &(to.in6.sin6_addr), addrstr,
407
if(inet_ntop(to.sin6_family, &(to.sin6_addr), addrstr,
497
408
sizeof(addrstr)) == NULL){
498
409
perror("inet_ntop");
500
411
if(strcmp(addrstr, ip) != 0){
501
fprintf(stderr, "Canonical address form: %s\n", addrstr);
412
fprintf(stderr, "Canonical address form: %s\n",
413
addrstr, ntohs(to.sin6_port));
506
ret = connect(tcp_sd, &to.in, sizeof(to));
418
ret = connect(tcp_sd, (struct sockaddr *) &to, sizeof(to));
508
420
perror("connect");
512
const char *out = mandos_protocol_version;
515
size_t out_size = strlen(out);
516
ret = TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
517
out_size - written));
523
written += (size_t)ret;
524
if(written < out_size){
527
if (out == mandos_protocol_version){
424
ret = initgnutls (&es);
430
gnutls_transport_set_ptr (es.session,
431
(gnutls_transport_ptr_t) tcp_sd);
537
434
fprintf(stderr, "Establishing TLS session with %s\n", ip);
540
gnutls_transport_set_ptr (session, (gnutls_transport_ptr_t) tcp_sd);
543
ret = gnutls_handshake (session);
544
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
437
ret = gnutls_handshake (es.session);
546
439
if (ret != GNUTLS_E_SUCCESS){
548
fprintf(stderr, "*** GnuTLS Handshake failed ***\n");
441
fprintf(stderr, "\n*** Handshake failed ***\n");
549
442
gnutls_perror (ret);
555
/* Read OpenPGP packet that contains the wanted password */
448
//Retrieve OpenPGP packet that contains the wanted password
558
451
fprintf(stderr, "Retrieving pgp encrypted password from %s\n",
579
473
case GNUTLS_E_AGAIN:
581
475
case GNUTLS_E_REHANDSHAKE:
583
ret = gnutls_handshake (session);
584
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
476
ret = gnutls_handshake (es.session);
586
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
478
fprintf(stderr, "\n*** Handshake failed ***\n");
587
479
gnutls_perror (ret);
593
485
fprintf(stderr, "Unknown error while reading data from"
594
" encrypted session with Mandos server\n");
486
" encrypted session with mandos server\n");
596
gnutls_bye (session, GNUTLS_SHUT_RDWR);
488
gnutls_bye (es.session, GNUTLS_SHUT_RDWR);
600
492
buffer_length += (size_t) ret;
605
fprintf(stderr, "Closing TLS session\n");
608
gnutls_bye (session, GNUTLS_SHUT_RDWR);
610
496
if (buffer_length > 0){
611
497
decrypted_buffer_size = pgp_packet_decrypt(buffer,
613
499
&decrypted_buffer,
615
501
if (decrypted_buffer_size >= 0){
617
502
while(written < (size_t) decrypted_buffer_size){
618
503
ret = (int)fwrite (decrypted_buffer + written, 1,
619
504
(size_t)decrypted_buffer_size - written,
637
/* Shutdown procedure */
525
fprintf(stderr, "Closing TLS session\n");
529
gnutls_bye (es.session, GNUTLS_SHUT_RDWR);
642
gnutls_deinit (session);
532
gnutls_deinit (es.session);
533
gnutls_certificate_free_credentials (es.cred);
534
gnutls_global_deinit ();
646
static void resolve_callback(AvahiSServiceResolver *r,
647
AvahiIfIndex interface,
648
AVAHI_GCC_UNUSED AvahiProtocol protocol,
649
AvahiResolverEvent event,
653
const char *host_name,
654
const AvahiAddress *address,
656
AVAHI_GCC_UNUSED AvahiStringList *txt,
657
AVAHI_GCC_UNUSED AvahiLookupResultFlags
660
mandos_context *mc = userdata;
538
static AvahiSimplePoll *simple_poll = NULL;
539
static AvahiServer *server = NULL;
541
static void resolve_callback(
542
AvahiSServiceResolver *r,
543
AvahiIfIndex interface,
544
AVAHI_GCC_UNUSED AvahiProtocol protocol,
545
AvahiResolverEvent event,
549
const char *host_name,
550
const AvahiAddress *address,
552
AVAHI_GCC_UNUSED AvahiStringList *txt,
553
AVAHI_GCC_UNUSED AvahiLookupResultFlags flags,
554
AVAHI_GCC_UNUSED void* userdata) {
661
556
assert(r); /* Spurious warning */
663
558
/* Called whenever a service has been resolved successfully or
688
583
avahi_s_service_resolver_free(r);
691
static void browse_callback( AvahiSServiceBrowser *b,
692
AvahiIfIndex interface,
693
AvahiProtocol protocol,
694
AvahiBrowserEvent event,
698
AVAHI_GCC_UNUSED AvahiLookupResultFlags
701
mandos_context *mc = userdata;
702
assert(b); /* Spurious warning */
704
/* Called whenever a new services becomes available on the LAN or
705
is removed from the LAN */
709
case AVAHI_BROWSER_FAILURE:
711
fprintf(stderr, "(Avahi browser) %s\n",
712
avahi_strerror(avahi_server_errno(mc->server)));
713
avahi_simple_poll_quit(mc->simple_poll);
716
case AVAHI_BROWSER_NEW:
717
/* We ignore the returned Avahi resolver object. In the callback
718
function we free it. If the Avahi server is terminated before
719
the callback function is called the Avahi server will free the
722
if (!(avahi_s_service_resolver_new(mc->server, interface,
723
protocol, name, type, domain,
724
AVAHI_PROTO_INET6, 0,
725
resolve_callback, mc)))
726
fprintf(stderr, "Avahi: Failed to resolve service '%s': %s\n",
727
name, avahi_strerror(avahi_server_errno(mc->server)));
730
case AVAHI_BROWSER_REMOVE:
733
case AVAHI_BROWSER_ALL_FOR_NOW:
734
case AVAHI_BROWSER_CACHE_EXHAUSTED:
736
fprintf(stderr, "No Mandos server found, still searching...\n");
586
static void browse_callback(
587
AvahiSServiceBrowser *b,
588
AvahiIfIndex interface,
589
AvahiProtocol protocol,
590
AvahiBrowserEvent event,
594
AVAHI_GCC_UNUSED AvahiLookupResultFlags flags,
597
AvahiServer *s = userdata;
598
assert(b); /* Spurious warning */
600
/* Called whenever a new services becomes available on the LAN or
601
is removed from the LAN */
605
case AVAHI_BROWSER_FAILURE:
607
fprintf(stderr, "(Browser) %s\n",
608
avahi_strerror(avahi_server_errno(server)));
609
avahi_simple_poll_quit(simple_poll);
612
case AVAHI_BROWSER_NEW:
613
/* We ignore the returned resolver object. In the callback
614
function we free it. If the server is terminated before
615
the callback function is called the server will free
616
the resolver for us. */
618
if (!(avahi_s_service_resolver_new(s, interface, protocol, name,
620
AVAHI_PROTO_INET6, 0,
621
resolve_callback, s)))
622
fprintf(stderr, "Failed to resolve service '%s': %s\n", name,
623
avahi_strerror(avahi_server_errno(s)));
626
case AVAHI_BROWSER_REMOVE:
629
case AVAHI_BROWSER_ALL_FOR_NOW:
630
case AVAHI_BROWSER_CACHE_EXHAUSTED:
742
635
/* Combines file name and path and returns the malloced new
752
memcpy(tmp, first, f_len); /* Spurious warning */
645
memcpy(tmp, first, f_len);
754
647
tmp[f_len] = '/';
756
memcpy(tmp + f_len + 1, second, s_len); /* Spurious warning */
649
memcpy(tmp + f_len + 1, second, s_len);
758
651
tmp[f_len + 1 + s_len] = '\0';
763
int main(int argc, char *argv[]){
656
int main(AVAHI_GCC_UNUSED int argc, AVAHI_GCC_UNUSED char*argv[]) {
657
AvahiServerConfig config;
764
658
AvahiSServiceBrowser *sb = NULL;
767
int exitcode = EXIT_SUCCESS;
768
const char *interface = "eth0";
769
struct ifreq network;
662
int returncode = EXIT_SUCCESS;
663
const char *interface = NULL;
664
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
773
665
char *connect_to = NULL;
774
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
775
const char *pubkeyfile = "pubkey.txt";
776
const char *seckeyfile = "seckey.txt";
777
mandos_context mc = { .simple_poll = NULL, .server = NULL,
778
.dh_bits = 1024, .priority = "SECURE256"};
779
bool gnutls_initalized = false;
782
struct argp_option options[] = {
783
{ .name = "debug", .key = 128,
784
.doc = "Debug mode", .group = 3 },
785
{ .name = "connect", .key = 'c',
787
.doc = "Connect directly to a sepcified mandos server",
789
{ .name = "interface", .key = 'i',
791
.doc = "Interface that Avahi will conntect through",
793
{ .name = "keydir", .key = 'd',
795
.doc = "Directory where the openpgp keyring is",
797
{ .name = "seckey", .key = 's',
799
.doc = "Secret openpgp key for gnutls authentication",
801
{ .name = "pubkey", .key = 'p',
803
.doc = "Public openpgp key for gnutls authentication",
805
{ .name = "dh-bits", .key = 129,
807
.doc = "dh-bits to use in gnutls communication",
809
{ .name = "priority", .key = 130,
811
.doc = "GNUTLS priority", .group = 1 },
816
error_t parse_opt (int key, char *arg,
817
struct argp_state *state) {
818
/* Get the INPUT argument from `argp_parse', which we know is
819
a pointer to our plugin list pointer. */
841
mc.dh_bits = (unsigned int) strtol(arg, NULL, 10);
856
return ARGP_ERR_UNKNOWN;
667
debug_int = debug ? 1 : 0;
669
static struct option long_options[] = {
670
{"debug", no_argument, &debug_int, 1},
671
{"connect", required_argument, NULL, 'C'},
672
{"interface", required_argument, NULL, 'i'},
673
{"keydir", required_argument, NULL, 'd'},
674
{"seckey", required_argument, NULL, 'c'},
675
{"pubkey", required_argument, NULL, 'k'},
676
{"dh-bits", required_argument, NULL, 'D'},
679
int option_index = 0;
680
ret = getopt_long (argc, argv, "i:", long_options,
861
struct argp argp = { .options = options, .parser = parse_opt,
863
.doc = "Mandos client -- Get and decrypt"
864
" passwords from mandos server" };
865
ret = argp_parse (&argp, argc, argv, 0, 0, NULL);
866
if (ret == ARGP_ERR_UNKNOWN){
867
fprintf(stderr, "Unkown error while parsing arguments\n");
868
exitcode = EXIT_FAILURE;
706
dh_bits = atoi(optarg);
714
debug = debug_int ? true : false;
873
716
pubkeyfile = combinepath(keydir, pubkeyfile);
874
717
if (pubkeyfile == NULL){
875
718
perror("combinepath");
876
exitcode = EXIT_FAILURE;
880
seckeyfile = combinepath(keydir, seckeyfile);
881
if (seckeyfile == NULL){
882
perror("combinepath");
886
ret = init_gnutls_global(&mc, pubkeyfile, seckeyfile);
888
fprintf(stderr, "init_gnutls_global\n");
891
gnutls_initalized = true;
907
if_index = (AvahiIfIndex) if_nametoindex(interface);
909
fprintf(stderr, "No such interface: \"%s\"\n", interface);
722
if(interface != NULL){
723
if_index = (AvahiIfIndex) if_nametoindex(interface);
725
fprintf(stderr, "No such interface: \"%s\"\n", interface);
913
730
if(connect_to != NULL){
916
733
char *address = strrchr(connect_to, ':');
917
734
if(address == NULL){
918
735
fprintf(stderr, "No colon in address\n");
919
exitcode = EXIT_FAILURE;
923
739
uint16_t port = (uint16_t) strtol(address+1, NULL, 10);
925
741
perror("Bad port number");
926
exitcode = EXIT_FAILURE;
930
745
address = connect_to;
931
ret = start_mandos_communication(address, port, if_index, &mc);
746
ret = start_mandos_communication(address, port, if_index);
933
exitcode = EXIT_FAILURE;
935
exitcode = EXIT_SUCCESS;
940
/* If the interface is down, bring it up */
942
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
945
exitcode = EXIT_FAILURE;
948
strcpy(network.ifr_name, interface); /* Spurious warning */
949
ret = ioctl(sd, SIOCGIFFLAGS, &network);
951
perror("ioctl SIOCGIFFLAGS");
952
exitcode = EXIT_FAILURE;
955
if((network.ifr_flags & IFF_UP) == 0){
956
network.ifr_flags |= IFF_UP;
957
ret = ioctl(sd, SIOCSIFFLAGS, &network);
959
perror("ioctl SIOCSIFFLAGS");
960
exitcode = EXIT_FAILURE;
754
seckeyfile = combinepath(keydir, seckeyfile);
755
if (seckeyfile == NULL){
756
perror("combinepath");
968
761
avahi_set_log_function(empty_log);
971
/* Initialize the pseudo-RNG for Avahi */
764
/* Initialize the psuedo-RNG */
972
765
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",
767
/* Allocate main loop object */
768
if (!(simple_poll = avahi_simple_poll_new())) {
769
fprintf(stderr, "Failed to create simple poll object.\n");
774
/* Do not publish any local records */
775
avahi_server_config_init(&config);
776
config.publish_hinfo = 0;
777
config.publish_addresses = 0;
778
config.publish_workstation = 0;
779
config.publish_domain = 0;
781
/* Allocate a new server */
782
server = avahi_server_new(avahi_simple_poll_get(simple_poll),
783
&config, NULL, NULL, &error);
785
/* Free the configuration data */
786
avahi_server_config_free(&config);
788
/* Check if creating the server object succeeded */
790
fprintf(stderr, "Failed to create server: %s\n",
1004
791
avahi_strerror(error));
1005
exitcode = EXIT_FAILURE;
792
returncode = EXIT_FAILURE;
1009
/* Create the Avahi service browser */
1010
sb = avahi_s_service_browser_new(mc.server, if_index,
796
/* Create the service browser */
797
sb = avahi_s_service_browser_new(server, if_index,
1011
798
AVAHI_PROTO_INET6,
1012
799
"_mandos._tcp", NULL, 0,
1013
browse_callback, &mc);
800
browse_callback, server);
1015
802
fprintf(stderr, "Failed to create service browser: %s\n",
1016
avahi_strerror(avahi_server_errno(mc.server)));
1017
exitcode = EXIT_FAILURE;
803
avahi_strerror(avahi_server_errno(server)));
804
returncode = EXIT_FAILURE;
1021
808
/* Run the main loop */
1024
fprintf(stderr, "Starting Avahi loop search\n");
811
fprintf(stderr, "Starting avahi loop search\n");
1027
avahi_simple_poll_loop(mc.simple_poll);
814
avahi_simple_poll_loop(simple_poll);
1032
819
fprintf(stderr, "%s exiting\n", argv[0]);
1035
822
/* Cleanup things */
1037
824
avahi_s_service_browser_free(sb);
1039
if (mc.server != NULL)
1040
avahi_server_free(mc.server);
827
avahi_server_free(server);
1042
if (mc.simple_poll != NULL)
1043
avahi_simple_poll_free(mc.simple_poll);
830
avahi_simple_poll_free(simple_poll);
1044
831
free(pubkeyfile);
1045
832
free(seckeyfile);
1047
if (gnutls_initalized){
1048
gnutls_certificate_free_credentials(mc.cred);
1049
gnutls_global_deinit ();