26
26
* along with this program. If not, see
27
27
* <http://www.gnu.org/licenses/>.
29
* Contact the authors at <mandos@recompile.se>.
29
* Contact the authors at <mandos@fukt.bsnet.se>.
32
32
/* Needed by GPGME, specifically gpgme_data_seek() */
33
#ifndef _LARGEFILE_SOURCE
34
33
#define _LARGEFILE_SOURCE
36
#ifndef _FILE_OFFSET_BITS
37
34
#define _FILE_OFFSET_BITS 64
40
36
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), asprintf() */
42
38
#include <stdio.h> /* fprintf(), stderr, fwrite(),
43
stdout, ferror(), remove() */
44
#include <stdint.h> /* uint16_t, uint32_t, intptr_t */
39
stdout, ferror(), sscanf(),
41
#include <stdint.h> /* uint16_t, uint32_t */
45
42
#include <stddef.h> /* NULL, size_t, ssize_t */
46
#include <stdlib.h> /* free(), EXIT_SUCCESS, srand(),
48
#include <stdbool.h> /* bool, false, true */
43
#include <stdlib.h> /* free(), EXIT_SUCCESS, EXIT_FAILURE,
45
#include <stdbool.h> /* bool, true */
49
46
#include <string.h> /* memset(), strcmp(), strlen(),
50
47
strerror(), asprintf(), strcpy() */
51
#include <sys/ioctl.h> /* ioctl */
48
#include <sys/ioctl.h> /* ioctl */
52
49
#include <sys/types.h> /* socket(), inet_pton(), sockaddr,
53
50
sockaddr_in6, PF_INET6,
54
SOCK_STREAM, uid_t, gid_t, open(),
56
#include <sys/stat.h> /* open(), S_ISREG */
51
SOCK_STREAM, INET6_ADDRSTRLEN,
52
uid_t, gid_t, open(), opendir(),
54
#include <sys/stat.h> /* open() */
57
55
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
58
inet_pton(), connect() */
56
struct in6_addr, inet_pton(),
59
58
#include <fcntl.h> /* open() */
60
59
#include <dirent.h> /* opendir(), struct dirent, readdir()
62
#include <inttypes.h> /* PRIu16, PRIdMAX, intmax_t,
64
#include <errno.h> /* perror(), errno,
65
program_invocation_short_name */
66
#include <time.h> /* nanosleep(), time(), sleep() */
61
#include <inttypes.h> /* PRIu16, intmax_t, SCNdMAX */
62
#include <assert.h> /* assert() */
63
#include <errno.h> /* perror(), errno */
64
#include <time.h> /* nanosleep(), time() */
67
65
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
68
66
SIOCSIFFLAGS, if_indextoname(),
69
67
if_nametoindex(), IF_NAMESIZE */
70
#include <netinet/in.h> /* IN6_IS_ADDR_LINKLOCAL,
71
INET_ADDRSTRLEN, INET6_ADDRSTRLEN
68
#include <netinet/in.h>
73
69
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
74
getuid(), getgid(), seteuid(),
75
setgid(), pause(), _exit() */
76
#include <arpa/inet.h> /* inet_pton(), htons, inet_ntop() */
77
#include <iso646.h> /* not, or, and */
70
getuid(), getgid(), setuid(),
72
#include <arpa/inet.h> /* inet_pton(), htons */
73
#include <iso646.h> /* not, and, or */
78
74
#include <argp.h> /* struct argp_option, error_t, struct
79
75
argp_state, struct argp,
80
76
argp_parse(), ARGP_KEY_ARG,
81
77
ARGP_KEY_END, ARGP_ERR_UNKNOWN */
82
#include <signal.h> /* sigemptyset(), sigaddset(),
83
sigaction(), SIGTERM, sig_atomic_t,
85
#include <sysexits.h> /* EX_OSERR, EX_USAGE, EX_UNAVAILABLE,
86
EX_NOHOST, EX_IOERR, EX_PROTOCOL */
87
#include <sys/wait.h> /* waitpid(), WIFEXITED(),
88
WEXITSTATUS(), WTERMSIG() */
89
#include <grp.h> /* setgroups() */
90
#include <argz.h> /* argz_add_sep(), argz_next(),
91
argz_delete(), argz_append(),
92
argz_stringify(), argz_add(),
96
79
#include <sys/klog.h> /* klogctl() */
97
#endif /* __linux__ */
100
83
/* All Avahi types, constants and functions
208
146
return buffer_capacity;
211
/* Add server to set of servers to retry periodically */
212
bool add_server(const char *ip, in_port_t port, AvahiIfIndex if_index,
215
server *new_server = malloc(sizeof(server));
216
if(new_server == NULL){
217
perror_plus("malloc");
220
*new_server = (server){ .ip = strdup(ip),
222
.if_index = if_index,
224
if(new_server->ip == NULL){
225
perror_plus("strdup");
228
/* Special case of first server */
229
if (mc.current_server == NULL){
230
new_server->next = new_server;
231
new_server->prev = new_server;
232
mc.current_server = new_server;
233
/* Place the new server last in the list */
235
new_server->next = mc.current_server;
236
new_server->prev = mc.current_server->prev;
237
new_server->prev->next = new_server;
238
mc.current_server->prev = new_server;
240
ret = clock_gettime(CLOCK_MONOTONIC, &mc.current_server->last_seen);
242
perror_plus("clock_gettime");
249
150
* Initialize GPGME.
251
static bool init_gpgme(const char *seckey, const char *pubkey,
252
const char *tempdir){
152
static bool init_gpgme(mandos_context *mc, const char *seckey,
153
const char *pubkey, const char *tempdir){
253
155
gpgme_error_t rc;
254
156
gpgme_engine_info_t engine_info;
257
160
* Helper function to insert pub and seckey to the engine keyring.
259
162
bool import_key(const char *filename){
262
164
gpgme_data_t pgp_data;
264
166
fd = (int)TEMP_FAILURE_RETRY(open(filename, O_RDONLY));
270
172
rc = gpgme_data_new_from_fd(&pgp_data, fd);
271
173
if(rc != GPG_ERR_NO_ERROR){
272
fprintf_plus(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
273
gpgme_strsource(rc), gpgme_strerror(rc));
174
fprintf(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
175
gpgme_strsource(rc), gpgme_strerror(rc));
277
rc = gpgme_op_import(mc.ctx, pgp_data);
179
rc = gpgme_op_import(mc->ctx, pgp_data);
278
180
if(rc != GPG_ERR_NO_ERROR){
279
fprintf_plus(stderr, "bad gpgme_op_import: %s: %s\n",
280
gpgme_strsource(rc), gpgme_strerror(rc));
181
fprintf(stderr, "bad gpgme_op_import: %s: %s\n",
182
gpgme_strsource(rc), gpgme_strerror(rc));
284
186
ret = (int)TEMP_FAILURE_RETRY(close(fd));
286
perror_plus("close");
288
190
gpgme_data_release(pgp_data);
293
fprintf_plus(stderr, "Initializing GPGME\n");
195
fprintf(stderr, "Initialize gpgme\n");
297
199
gpgme_check_version(NULL);
298
200
rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
299
201
if(rc != GPG_ERR_NO_ERROR){
300
fprintf_plus(stderr, "bad gpgme_engine_check_version: %s: %s\n",
301
gpgme_strsource(rc), gpgme_strerror(rc));
202
fprintf(stderr, "bad gpgme_engine_check_version: %s: %s\n",
203
gpgme_strsource(rc), gpgme_strerror(rc));
305
/* Set GPGME home directory for the OpenPGP engine only */
207
/* Set GPGME home directory for the OpenPGP engine only */
306
208
rc = gpgme_get_engine_info(&engine_info);
307
209
if(rc != GPG_ERR_NO_ERROR){
308
fprintf_plus(stderr, "bad gpgme_get_engine_info: %s: %s\n",
309
gpgme_strsource(rc), gpgme_strerror(rc));
210
fprintf(stderr, "bad gpgme_get_engine_info: %s: %s\n",
211
gpgme_strsource(rc), gpgme_strerror(rc));
312
214
while(engine_info != NULL){
353
254
ssize_t plaintext_length = 0;
356
fprintf_plus(stderr, "Trying to decrypt OpenPGP data\n");
257
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
359
260
/* Create new GPGME data buffer from memory cryptotext */
360
261
rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,
362
263
if(rc != GPG_ERR_NO_ERROR){
363
fprintf_plus(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
364
gpgme_strsource(rc), gpgme_strerror(rc));
264
fprintf(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
265
gpgme_strsource(rc), gpgme_strerror(rc));
368
269
/* Create new empty GPGME data buffer for the plaintext */
369
270
rc = gpgme_data_new(&dh_plain);
370
271
if(rc != GPG_ERR_NO_ERROR){
371
fprintf_plus(stderr, "Mandos plugin mandos-client: "
372
"bad gpgme_data_new: %s: %s\n",
373
gpgme_strsource(rc), gpgme_strerror(rc));
272
fprintf(stderr, "bad gpgme_data_new: %s: %s\n",
273
gpgme_strsource(rc), gpgme_strerror(rc));
374
274
gpgme_data_release(dh_crypto);
378
278
/* Decrypt data from the cryptotext data buffer to the plaintext
380
rc = gpgme_op_decrypt(mc.ctx, dh_crypto, dh_plain);
280
rc = gpgme_op_decrypt(mc->ctx, dh_crypto, dh_plain);
381
281
if(rc != GPG_ERR_NO_ERROR){
382
fprintf_plus(stderr, "bad gpgme_op_decrypt: %s: %s\n",
383
gpgme_strsource(rc), gpgme_strerror(rc));
282
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
283
gpgme_strsource(rc), gpgme_strerror(rc));
384
284
plaintext_length = -1;
386
286
gpgme_decrypt_result_t result;
387
result = gpgme_op_decrypt_result(mc.ctx);
287
result = gpgme_op_decrypt_result(mc->ctx);
388
288
if(result == NULL){
389
fprintf_plus(stderr, "gpgme_op_decrypt_result failed\n");
289
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
391
fprintf_plus(stderr, "Unsupported algorithm: %s\n",
392
result->unsupported_algorithm);
393
fprintf_plus(stderr, "Wrong key usage: %u\n",
394
result->wrong_key_usage);
291
fprintf(stderr, "Unsupported algorithm: %s\n",
292
result->unsupported_algorithm);
293
fprintf(stderr, "Wrong key usage: %u\n",
294
result->wrong_key_usage);
395
295
if(result->file_name != NULL){
396
fprintf_plus(stderr, "File name: %s\n", result->file_name);
296
fprintf(stderr, "File name: %s\n", result->file_name);
398
298
gpgme_recipient_t recipient;
399
299
recipient = result->recipients;
400
while(recipient != NULL){
401
fprintf_plus(stderr, "Public key algorithm: %s\n",
402
gpgme_pubkey_algo_name
403
(recipient->pubkey_algo));
404
fprintf_plus(stderr, "Key ID: %s\n", recipient->keyid);
405
fprintf_plus(stderr, "Secret key available: %s\n",
406
recipient->status == GPG_ERR_NO_SECKEY
408
recipient = recipient->next;
301
while(recipient != NULL){
302
fprintf(stderr, "Public key algorithm: %s\n",
303
gpgme_pubkey_algo_name(recipient->pubkey_algo));
304
fprintf(stderr, "Key ID: %s\n", recipient->keyid);
305
fprintf(stderr, "Secret key available: %s\n",
306
recipient->status == GPG_ERR_NO_SECKEY
308
recipient = recipient->next;
506
409
/* OpenPGP credentials */
507
ret = gnutls_certificate_allocate_credentials(&mc.cred);
410
gnutls_certificate_allocate_credentials(&mc->cred);
508
411
if(ret != GNUTLS_E_SUCCESS){
509
fprintf_plus(stderr, "GnuTLS memory error: %s\n",
510
safer_gnutls_strerror(ret));
412
fprintf(stderr, "GnuTLS memory error: %s\n", /* Spurious warning
416
safer_gnutls_strerror(ret));
511
417
gnutls_global_deinit();
516
fprintf_plus(stderr, "Attempting to use OpenPGP public key %s and"
517
" secret key %s as GnuTLS credentials\n",
422
fprintf(stderr, "Attempting to use OpenPGP public key %s and"
423
" secret key %s as GnuTLS credentials\n", pubkeyfilename,
522
427
ret = gnutls_certificate_set_openpgp_key_file
523
(mc.cred, pubkeyfilename, seckeyfilename,
428
(mc->cred, pubkeyfilename, seckeyfilename,
524
429
GNUTLS_OPENPGP_FMT_BASE64);
525
430
if(ret != GNUTLS_E_SUCCESS){
527
"Error[%d] while reading the OpenPGP key pair ('%s',"
528
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
529
fprintf_plus(stderr, "The GnuTLS error is: %s\n",
530
safer_gnutls_strerror(ret));
432
"Error[%d] while reading the OpenPGP key pair ('%s',"
433
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
434
fprintf(stderr, "The GnuTLS error is: %s\n",
435
safer_gnutls_strerror(ret));
534
439
/* GnuTLS server initialization */
535
ret = gnutls_dh_params_init(&mc.dh_params);
440
ret = gnutls_dh_params_init(&mc->dh_params);
536
441
if(ret != GNUTLS_E_SUCCESS){
537
fprintf_plus(stderr, "Error in GnuTLS DH parameter"
538
" initialization: %s\n",
539
safer_gnutls_strerror(ret));
442
fprintf(stderr, "Error in GnuTLS DH parameter initialization:"
443
" %s\n", safer_gnutls_strerror(ret));
542
ret = gnutls_dh_params_generate2(mc.dh_params, mc.dh_bits);
446
ret = gnutls_dh_params_generate2(mc->dh_params, mc->dh_bits);
543
447
if(ret != GNUTLS_E_SUCCESS){
544
fprintf_plus(stderr, "Error in GnuTLS prime generation: %s\n",
545
safer_gnutls_strerror(ret));
448
fprintf(stderr, "Error in GnuTLS prime generation: %s\n",
449
safer_gnutls_strerror(ret));
549
gnutls_certificate_set_dh_params(mc.cred, mc.dh_params);
453
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
555
gnutls_certificate_free_credentials(mc.cred);
459
gnutls_certificate_free_credentials(mc->cred);
556
460
gnutls_global_deinit();
557
gnutls_dh_params_deinit(mc.dh_params);
461
gnutls_dh_params_deinit(mc->dh_params);
561
static int init_gnutls_session(gnutls_session_t *session){
465
static int init_gnutls_session(mandos_context *mc,
466
gnutls_session_t *session){
563
468
/* GnuTLS session creation */
565
ret = gnutls_init(session, GNUTLS_SERVER);
569
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
469
ret = gnutls_init(session, GNUTLS_SERVER);
570
470
if(ret != GNUTLS_E_SUCCESS){
572
"Error in GnuTLS session initialization: %s\n",
573
safer_gnutls_strerror(ret));
471
fprintf(stderr, "Error in GnuTLS session initialization: %s\n",
472
safer_gnutls_strerror(ret));
579
ret = gnutls_priority_set_direct(*session, mc.priority, &err);
581
gnutls_deinit(*session);
584
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
477
ret = gnutls_priority_set_direct(*session, mc->priority, &err);
585
478
if(ret != GNUTLS_E_SUCCESS){
586
fprintf_plus(stderr, "Syntax error at: %s\n", err);
587
fprintf_plus(stderr, "GnuTLS error: %s\n",
588
safer_gnutls_strerror(ret));
479
fprintf(stderr, "Syntax error at: %s\n", err);
480
fprintf(stderr, "GnuTLS error: %s\n",
481
safer_gnutls_strerror(ret));
589
482
gnutls_deinit(*session);
595
ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,
598
gnutls_deinit(*session);
601
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
487
ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,
602
489
if(ret != GNUTLS_E_SUCCESS){
603
fprintf_plus(stderr, "Error setting GnuTLS credentials: %s\n",
604
safer_gnutls_strerror(ret));
490
fprintf(stderr, "Error setting GnuTLS credentials: %s\n",
491
safer_gnutls_strerror(ret));
605
492
gnutls_deinit(*session);
609
496
/* ignore client certificate if any. */
610
gnutls_certificate_server_set_request(*session, GNUTLS_CERT_IGNORE);
497
gnutls_certificate_server_set_request(*session,
612
gnutls_dh_set_prime_bits(*session, mc.dh_bits);
500
gnutls_dh_set_prime_bits(*session, mc->dh_bits);
619
507
__attribute__((unused)) const char *txt){}
621
509
/* Called when a Mandos server is found */
622
static int start_mandos_communication(const char *ip, in_port_t port,
510
static int start_mandos_communication(const char *ip, uint16_t port,
623
511
AvahiIfIndex if_index,
625
int ret, tcp_sd = -1;
628
struct sockaddr_in in;
629
struct sockaddr_in6 in6;
515
union { struct sockaddr in; struct sockaddr_in6 in6; } to;
631
516
char *buffer = NULL;
632
char *decrypted_buffer = NULL;
517
char *decrypted_buffer;
633
518
size_t buffer_length = 0;
634
519
size_t buffer_capacity = 0;
520
ssize_t decrypted_buffer_size;
523
char interface[IF_NAMESIZE];
637
524
gnutls_session_t session;
638
int pf; /* Protocol family */
655
fprintf_plus(stderr, "Bad address family: %d\n", af);
660
ret = init_gnutls_session(&session);
526
ret = init_gnutls_session(mc, &session);
666
fprintf_plus(stderr, "Setting up a TCP connection to %s, port %"
667
PRIuMAX "\n", ip, (uintmax_t)port);
532
fprintf(stderr, "Setting up a tcp connection to %s, port %" PRIu16
670
tcp_sd = socket(pf, SOCK_STREAM, 0);
536
tcp_sd = socket(PF_INET6, SOCK_STREAM, 0);
673
perror_plus("socket");
543
if(if_indextoname((unsigned int)if_index, interface) == NULL){
544
perror("if_indextoname");
547
fprintf(stderr, "Binding to interface %s\n", interface);
683
550
memset(&to, 0, sizeof(to));
685
to.in6.sin6_family = (sa_family_t)af;
686
ret = inet_pton(af, ip, &to.in6.sin6_addr);
688
to.in.sin_family = (sa_family_t)af;
689
ret = inet_pton(af, ip, &to.in.sin_addr);
551
to.in6.sin6_family = AF_INET6;
552
/* It would be nice to have a way to detect if we were passed an
553
IPv4 address here. Now we assume an IPv6 address. */
554
ret = inet_pton(AF_INET6, ip, &to.in6.sin6_addr);
693
perror_plus("inet_pton");
699
fprintf_plus(stderr, "Bad address: %s\n", ip);
560
fprintf(stderr, "Bad address: %s\n", ip);
704
to.in6.sin6_port = htons(port);
705
if(IN6_IS_ADDR_LINKLOCAL /* Spurious warnings from */
706
(&to.in6.sin6_addr)){ /* -Wstrict-aliasing=2 or lower and
708
if(if_index == AVAHI_IF_UNSPEC){
709
fprintf_plus(stderr, "An IPv6 link-local address is"
710
" incomplete without a network interface\n");
714
/* Set the network interface number as scope */
715
to.in6.sin6_scope_id = (uint32_t)if_index;
718
to.in.sin_port = htons(port); /* Spurious warnings from
563
to.in6.sin6_port = htons(port); /* Spurious warnings from
720
565
-Wunreachable-code */
567
to.in6.sin6_scope_id = (uint32_t)if_index;
729
if(af == AF_INET6 and if_index != AVAHI_IF_UNSPEC){
730
char interface[IF_NAMESIZE];
731
if(if_indextoname((unsigned int)if_index, interface) == NULL){
732
perror_plus("if_indextoname");
734
fprintf_plus(stderr, "Connection to: %s%%%s, port %" PRIuMAX
735
"\n", ip, interface, (uintmax_t)port);
738
fprintf_plus(stderr, "Connection to: %s, port %" PRIuMAX "\n",
739
ip, (uintmax_t)port);
741
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
742
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
745
pcret = inet_ntop(af, &(to.in6.sin6_addr), addrstr,
748
pcret = inet_ntop(af, &(to.in.sin_addr), addrstr,
752
perror_plus("inet_ntop");
570
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
572
char addrstr[INET6_ADDRSTRLEN] = "";
573
if(inet_ntop(to.in6.sin6_family, &(to.in6.sin6_addr), addrstr,
574
sizeof(addrstr)) == NULL){
754
577
if(strcmp(addrstr, ip) != 0){
755
fprintf_plus(stderr, "Canonical address form: %s\n", addrstr);
578
fprintf(stderr, "Canonical address form: %s\n", addrstr);
766
ret = connect(tcp_sd, &to.in6, sizeof(to));
768
ret = connect(tcp_sd, &to.in, sizeof(to)); /* IPv4 */
583
ret = connect(tcp_sd, &to.in, sizeof(to));
771
if ((errno != ECONNREFUSED and errno != ENETUNREACH) or debug){
773
perror_plus("connect");
784
589
const char *out = mandos_protocol_version;
1099
815
case AVAHI_BROWSER_ALL_FOR_NOW:
1100
816
case AVAHI_BROWSER_CACHE_EXHAUSTED:
1102
fprintf_plus(stderr, "No Mandos server found, still"
818
fprintf(stderr, "No Mandos server found, still searching...\n");
1109
/* Signal handler that stops main loop after SIGTERM */
1110
static void handle_sigterm(int sig){
1115
signal_received = sig;
1116
int old_errno = errno;
1117
/* set main loop to exit */
1118
if(simple_poll != NULL){
1119
avahi_simple_poll_quit(simple_poll);
1124
bool get_flags(const char *ifname, struct ifreq *ifr){
1128
int s = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1131
perror_plus("socket");
1135
strcpy(ifr->ifr_name, ifname);
1136
ret = ioctl(s, SIOCGIFFLAGS, ifr);
1140
perror_plus("ioctl SIOCGIFFLAGS");
1148
bool good_flags(const char *ifname, const struct ifreq *ifr){
1150
/* Reject the loopback device */
1151
if(ifr->ifr_flags & IFF_LOOPBACK){
1153
fprintf_plus(stderr, "Rejecting loopback interface \"%s\"\n",
1158
/* Accept point-to-point devices only if connect_to is specified */
1159
if(connect_to != NULL and (ifr->ifr_flags & IFF_POINTOPOINT)){
1161
fprintf_plus(stderr, "Accepting point-to-point interface"
1162
" \"%s\"\n", ifname);
1166
/* Otherwise, reject non-broadcast-capable devices */
1167
if(not (ifr->ifr_flags & IFF_BROADCAST)){
1169
fprintf_plus(stderr, "Rejecting non-broadcast interface"
1170
" \"%s\"\n", ifname);
1174
/* Reject non-ARP interfaces (including dummy interfaces) */
1175
if(ifr->ifr_flags & IFF_NOARP){
1177
fprintf_plus(stderr, "Rejecting non-ARP interface \"%s\"\n",
1183
/* Accept this device */
1185
fprintf_plus(stderr, "Interface \"%s\" is good\n", ifname);
1191
* This function determines if a directory entry in /sys/class/net
1192
* corresponds to an acceptable network device.
1193
* (This function is passed to scandir(3) as a filter function.)
1195
int good_interface(const struct dirent *if_entry){
1196
if(if_entry->d_name[0] == '.'){
1201
if(not get_flags(if_entry->d_name, &ifr)){
1203
fprintf_plus(stderr, "Failed to get flags for interface "
1204
"\"%s\"\n", if_entry->d_name);
1209
if(not good_flags(if_entry->d_name, &ifr)){
1216
* This function determines if a network interface is up.
1218
bool interface_is_up(const char *interface){
1220
if(not get_flags(interface, &ifr)){
1222
fprintf_plus(stderr, "Failed to get flags for interface "
1223
"\"%s\"\n", interface);
1228
return (bool)(ifr.ifr_flags & IFF_UP);
1232
* This function determines if a network interface is running
1234
bool interface_is_running(const char *interface){
1236
if(not get_flags(interface, &ifr)){
1238
fprintf_plus(stderr, "Failed to get flags for interface "
1239
"\"%s\"\n", interface);
1244
return (bool)(ifr.ifr_flags & IFF_RUNNING);
1247
int notdotentries(const struct dirent *direntry){
1248
/* Skip "." and ".." */
1249
if(direntry->d_name[0] == '.'
1250
and (direntry->d_name[1] == '\0'
1251
or (direntry->d_name[1] == '.'
1252
and direntry->d_name[2] == '\0'))){
1258
/* Is this directory entry a runnable program? */
1259
int runnable_hook(const struct dirent *direntry){
1264
if((direntry->d_name)[0] == '\0'){
1269
sret = strspn(direntry->d_name, "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
1270
"abcdefghijklmnopqrstuvwxyz"
1273
if((direntry->d_name)[sret] != '\0'){
1274
/* Contains non-allowed characters */
1276
fprintf_plus(stderr, "Ignoring hook \"%s\" with bad name\n",
1282
char *fullname = NULL;
1283
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1285
perror_plus("asprintf");
1289
ret = stat(fullname, &st);
1292
perror_plus("Could not stat hook");
1296
if(not (S_ISREG(st.st_mode))){
1297
/* Not a regular file */
1299
fprintf_plus(stderr, "Ignoring hook \"%s\" - not a file\n",
1304
if(not (st.st_mode & (S_IXUSR | S_IXGRP | S_IXOTH))){
1305
/* Not executable */
1307
fprintf_plus(stderr, "Ignoring hook \"%s\" - not executable\n",
1313
fprintf_plus(stderr, "Hook \"%s\" is acceptable\n",
1319
int avahi_loop_with_timeout(AvahiSimplePoll *s, int retry_interval){
1321
struct timespec now;
1322
struct timespec waited_time;
1323
intmax_t block_time;
1326
if(mc.current_server == NULL){
1328
fprintf_plus(stderr, "Wait until first server is found."
1331
ret = avahi_simple_poll_iterate(s, -1);
1334
fprintf_plus(stderr, "Check current_server if we should run"
1337
/* the current time */
1338
ret = clock_gettime(CLOCK_MONOTONIC, &now);
1340
perror_plus("clock_gettime");
1343
/* Calculating in ms how long time between now and server
1344
who we visted longest time ago. Now - last seen. */
1345
waited_time.tv_sec = (now.tv_sec
1346
- mc.current_server->last_seen.tv_sec);
1347
waited_time.tv_nsec = (now.tv_nsec
1348
- mc.current_server->last_seen.tv_nsec);
1349
/* total time is 10s/10,000ms.
1350
Converting to s from ms by dividing by 1,000,
1351
and ns to ms by dividing by 1,000,000. */
1352
block_time = ((retry_interval
1353
- ((intmax_t)waited_time.tv_sec * 1000))
1354
- ((intmax_t)waited_time.tv_nsec / 1000000));
1357
fprintf_plus(stderr, "Blocking for %" PRIdMAX " ms\n",
1361
if(block_time <= 0){
1362
ret = start_mandos_communication(mc.current_server->ip,
1363
mc.current_server->port,
1364
mc.current_server->if_index,
1365
mc.current_server->af);
1367
avahi_simple_poll_quit(simple_poll);
1370
ret = clock_gettime(CLOCK_MONOTONIC,
1371
&mc.current_server->last_seen);
1373
perror_plus("clock_gettime");
1376
mc.current_server = mc.current_server->next;
1377
block_time = 0; /* Call avahi to find new Mandos
1378
servers, but don't block */
1381
ret = avahi_simple_poll_iterate(s, (int)block_time);
1384
if (ret > 0 or errno != EINTR){
1385
return (ret != 1) ? ret : 0;
1391
/* Set effective uid to 0, return errno */
1392
error_t raise_privileges(void){
1393
error_t old_errno = errno;
1394
error_t ret_errno = 0;
1395
if(seteuid(0) == -1){
1397
perror_plus("seteuid");
1403
/* Set effective and real user ID to 0. Return errno. */
1404
error_t raise_privileges_permanently(void){
1405
error_t old_errno = errno;
1406
error_t ret_errno = raise_privileges();
1411
if(setuid(0) == -1){
1413
perror_plus("seteuid");
1419
/* Set effective user ID to unprivileged saved user ID */
1420
error_t lower_privileges(void){
1421
error_t old_errno = errno;
1422
error_t ret_errno = 0;
1423
if(seteuid(uid) == -1){
1425
perror_plus("seteuid");
1431
/* Lower privileges permanently */
1432
error_t lower_privileges_permanently(void){
1433
error_t old_errno = errno;
1434
error_t ret_errno = 0;
1435
if(setuid(uid) == -1){
1437
perror_plus("setuid");
1443
bool run_network_hooks(const char *mode, const char *interface,
1445
struct dirent **direntries;
1446
struct dirent *direntry;
1448
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1451
if(errno == ENOENT){
1453
fprintf_plus(stderr, "Network hook directory \"%s\" not"
1454
" found\n", hookdir);
1457
perror_plus("scandir");
1460
int devnull = open("/dev/null", O_RDONLY);
1461
for(int i = 0; i < numhooks; i++){
1462
direntry = direntries[i];
1463
char *fullname = NULL;
1464
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1466
perror_plus("asprintf");
1470
fprintf_plus(stderr, "Running network hook \"%s\"\n",
1473
pid_t hook_pid = fork();
1476
/* Raise privileges */
1477
raise_privileges_permanently();
1482
perror_plus("setgid");
1484
/* Reset supplementary groups */
1486
ret = setgroups(0, NULL);
1488
perror_plus("setgroups");
1490
dup2(devnull, STDIN_FILENO);
1492
dup2(STDERR_FILENO, STDOUT_FILENO);
1493
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1495
perror_plus("setenv");
1498
ret = setenv("DEVICE", interface, 1);
1500
perror_plus("setenv");
1503
ret = setenv("VERBOSITY", debug ? "1" : "0", 1);
1505
perror_plus("setenv");
1508
ret = setenv("MODE", mode, 1);
1510
perror_plus("setenv");
1514
ret = asprintf(&delaystring, "%f", delay);
1516
perror_plus("asprintf");
1519
ret = setenv("DELAY", delaystring, 1);
1522
perror_plus("setenv");
1526
if(connect_to != NULL){
1527
ret = setenv("CONNECT", connect_to, 1);
1529
perror_plus("setenv");
1533
if(execl(fullname, direntry->d_name, mode, NULL) == -1){
1534
perror_plus("execl");
1535
_exit(EXIT_FAILURE);
1539
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
1540
perror_plus("waitpid");
1544
if(WIFEXITED(status)){
1545
if(WEXITSTATUS(status) != 0){
1546
fprintf_plus(stderr, "Warning: network hook \"%s\" exited"
1547
" with status %d\n", direntry->d_name,
1548
WEXITSTATUS(status));
1552
} else if(WIFSIGNALED(status)){
1553
fprintf_plus(stderr, "Warning: network hook \"%s\" died by"
1554
" signal %d\n", direntry->d_name,
1559
fprintf_plus(stderr, "Warning: network hook \"%s\""
1560
" crashed\n", direntry->d_name);
1567
fprintf_plus(stderr, "Network hook \"%s\" ran successfully\n",
1576
error_t bring_up_interface(const char *const interface,
1579
error_t old_errno = errno;
1580
error_t ret_errno = 0;
1581
int ret, ret_setflags;
1582
struct ifreq network;
1583
unsigned int if_index = if_nametoindex(interface);
1585
fprintf_plus(stderr, "No such interface: \"%s\"\n", interface);
1595
if(not interface_is_up(interface)){
1596
if(not get_flags(interface, &network) and debug){
1598
fprintf_plus(stderr, "Failed to get flags for interface "
1599
"\"%s\"\n", interface);
1602
network.ifr_flags |= IFF_UP;
1604
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1607
perror_plus("socket");
1619
fprintf_plus(stderr, "Bringing up interface \"%s\"\n",
1623
/* Raise priviliges */
1627
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1628
messages about the network interface to mess up the prompt */
1629
int ret_linux = klogctl(8, NULL, 5);
1630
bool restore_loglevel = true;
1631
if(ret_linux == -1){
1632
restore_loglevel = false;
1633
perror_plus("klogctl");
1635
#endif /* __linux__ */
1636
ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1639
if(restore_loglevel){
1640
ret_linux = klogctl(7, NULL, 0);
1641
if(ret_linux == -1){
1642
perror_plus("klogctl");
1645
#endif /* __linux__ */
1647
/* Lower privileges */
1650
/* Close the socket */
1651
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1653
perror_plus("close");
1656
if(ret_setflags == -1){
1658
perror_plus("ioctl SIOCSIFFLAGS +IFF_UP");
1663
fprintf_plus(stderr, "Interface \"%s\" is already up; good\n",
1667
/* Sleep checking until interface is running.
1668
Check every 0.25s, up to total time of delay */
1669
for(int i=0; i < delay * 4; i++){
1670
if(interface_is_running(interface)){
1673
struct timespec sleeptime = { .tv_nsec = 250000000 };
1674
ret = nanosleep(&sleeptime, NULL);
1675
if(ret == -1 and errno != EINTR){
1676
perror_plus("nanosleep");
1684
error_t take_down_interface(const char *const interface){
1686
error_t old_errno = errno;
1687
error_t ret_errno = 0;
1688
int ret, ret_setflags;
1689
struct ifreq network;
1690
unsigned int if_index = if_nametoindex(interface);
1692
fprintf_plus(stderr, "No such interface: \"%s\"\n", interface);
1696
if(interface_is_up(interface)){
1697
if(not get_flags(interface, &network) and debug){
1699
fprintf_plus(stderr, "Failed to get flags for interface "
1700
"\"%s\"\n", interface);
1703
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
1705
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1708
perror_plus("socket");
1714
fprintf_plus(stderr, "Taking down interface \"%s\"\n",
1718
/* Raise priviliges */
1721
ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1724
/* Lower privileges */
1727
/* Close the socket */
1728
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1730
perror_plus("close");
1733
if(ret_setflags == -1){
1735
perror_plus("ioctl SIOCSIFFLAGS -IFF_UP");
1740
fprintf_plus(stderr, "Interface \"%s\" is already down; odd\n",
1748
824
int main(int argc, char *argv[]){
1749
825
AvahiSServiceBrowser *sb = NULL;
1752
828
intmax_t tmpmax;
1754
830
int exitcode = EXIT_SUCCESS;
1755
char *interfaces = NULL;
1756
size_t interfaces_size = 0;
1757
char *interfaces_to_take_down = NULL;
1758
size_t interfaces_to_take_down_size = 0;
831
const char *interface = "eth0";
832
struct ifreq network;
836
char *connect_to = NULL;
1759
837
char tempdir[] = "/tmp/mandosXXXXXX";
1760
838
bool tempdir_created = false;
1761
839
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
1762
840
const char *seckey = PATHDIR "/" SECKEY;
1763
841
const char *pubkey = PATHDIR "/" PUBKEY;
1764
char *interfaces_hooks = NULL;
1765
size_t interfaces_hooks_size = 0;
843
mandos_context mc = { .simple_poll = NULL, .server = NULL,
844
.dh_bits = 1024, .priority = "SECURE256"
845
":!CTYPE-X.509:+CTYPE-OPENPGP" };
1767
846
bool gnutls_initialized = false;
1768
847
bool gpgme_initialized = false;
1770
double retry_interval = 10; /* 10s between trying a server and
1771
retrying the same server again */
1773
struct sigaction old_sigterm_action = { .sa_handler = SIG_DFL };
1774
struct sigaction sigterm_action = { .sa_handler = handle_sigterm };
1779
/* Lower any group privileges we might have, just to be safe */
1783
perror_plus("setgid");
1786
/* Lower user privileges (temporarily) */
1790
perror_plus("seteuid");
1798
851
struct argp_option options[] = {
1884
915
mc.priority = arg;
1886
917
case 131: /* --delay */
1888
delay = strtof(arg, &tmp);
1889
if(errno != 0 or tmp == arg or *tmp != '\0'){
1890
argp_error(state, "Bad delay");
1892
case 132: /* --retry */
1894
retry_interval = strtod(arg, &tmp);
1895
if(errno != 0 or tmp == arg or *tmp != '\0'
1896
or (retry_interval * 1000) > INT_MAX
1897
or retry_interval < 0){
1898
argp_error(state, "Bad retry interval");
1901
case 133: /* --network-hook-dir */
1905
* These reproduce what we would get without ARGP_NO_HELP
1907
case '?': /* --help */
1908
argp_state_help(state, state->out_stream,
1909
(ARGP_HELP_STD_HELP | ARGP_HELP_EXIT_ERR)
1910
& ~(unsigned int)ARGP_HELP_EXIT_OK);
1911
case -3: /* --usage */
1912
argp_state_help(state, state->out_stream,
1913
ARGP_HELP_USAGE | ARGP_HELP_EXIT_ERR);
1914
case 'V': /* --version */
1915
fprintf_plus(state->out_stream, "%s\n", argp_program_version);
1916
exit(argp_err_exit_status);
918
ret = sscanf(arg, "%lf%n", &delay, &numchars);
919
if(ret < 1 or arg[numchars] != '\0'){
920
fprintf(stderr, "Bad delay\n");
1919
929
return ARGP_ERR_UNKNOWN;
1924
934
struct argp argp = { .options = options, .parser = parse_opt,
1926
936
.doc = "Mandos client -- Get and decrypt"
1927
937
" passwords from a Mandos server" };
1928
ret = argp_parse(&argp, argc, argv,
1929
ARGP_IN_ORDER | ARGP_NO_HELP, 0, NULL);
1936
perror_plus("argp_parse");
1937
exitcode = EX_OSERR;
1940
exitcode = EX_USAGE;
1946
/* Work around Debian bug #633582:
1947
<http://bugs.debian.org/633582> */
1949
/* Re-raise priviliges */
1950
if(raise_privileges() == 0){
1953
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
1954
int seckey_fd = open(seckey, O_RDONLY);
1955
if(seckey_fd == -1){
1956
perror_plus("open");
1958
ret = (int)TEMP_FAILURE_RETRY(fstat(seckey_fd, &st));
1960
perror_plus("fstat");
1962
if(S_ISREG(st.st_mode)
1963
and st.st_uid == 0 and st.st_gid == 0){
1964
ret = fchown(seckey_fd, uid, gid);
1966
perror_plus("fchown");
1970
TEMP_FAILURE_RETRY(close(seckey_fd));
1974
if(strcmp(pubkey, PATHDIR "/" PUBKEY) == 0){
1975
int pubkey_fd = open(pubkey, O_RDONLY);
1976
if(pubkey_fd == -1){
1977
perror_plus("open");
1979
ret = (int)TEMP_FAILURE_RETRY(fstat(pubkey_fd, &st));
1981
perror_plus("fstat");
1983
if(S_ISREG(st.st_mode)
1984
and st.st_uid == 0 and st.st_gid == 0){
1985
ret = fchown(pubkey_fd, uid, gid);
1987
perror_plus("fchown");
1991
TEMP_FAILURE_RETRY(close(pubkey_fd));
1995
/* Lower privileges */
1999
perror_plus("seteuid");
2004
/* Remove empty interface names */
2006
char *interface = NULL;
2007
while((interface = argz_next(interfaces, interfaces_size,
2009
if(if_nametoindex(interface) == 0){
2010
if(interface[0] != '\0' and strcmp(interface, "none") != 0){
2011
fprintf_plus(stderr, "Not using nonexisting interface"
2012
" \"%s\"\n", interface);
2014
argz_delete(&interfaces, &interfaces_size, interface);
2020
/* Run network hooks */
2023
if(interfaces != NULL){
2024
interfaces_hooks = malloc(interfaces_size);
2025
if(interfaces_hooks == NULL){
2026
perror_plus("malloc");
938
ret = argp_parse(&argp, argc, argv, 0, 0, NULL);
939
if(ret == ARGP_ERR_UNKNOWN){
940
fprintf(stderr, "Unknown error while parsing arguments\n");
941
exitcode = EXIT_FAILURE;
946
/* If the interface is down, bring it up */
949
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
950
messages to mess up the prompt */
951
ret = klogctl(8, NULL, 5);
957
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
960
exitcode = EXIT_FAILURE;
962
ret = klogctl(7, NULL, 0);
969
strcpy(network.ifr_name, interface);
970
ret = ioctl(sd, SIOCGIFFLAGS, &network);
972
perror("ioctl SIOCGIFFLAGS");
974
ret = klogctl(7, NULL, 0);
979
exitcode = EXIT_FAILURE;
982
if((network.ifr_flags & IFF_UP) == 0){
983
network.ifr_flags |= IFF_UP;
984
ret = ioctl(sd, SIOCSIFFLAGS, &network);
986
perror("ioctl SIOCSIFFLAGS");
987
exitcode = EXIT_FAILURE;
989
ret = klogctl(7, NULL, 0);
2029
memcpy(interfaces_hooks, interfaces, interfaces_size);
2030
interfaces_hooks_size = interfaces_size;
2031
argz_stringify(interfaces_hooks, interfaces_hooks_size,
2034
if(not run_network_hooks("start", interfaces_hooks != NULL ?
2035
interfaces_hooks : "", delay)){
2041
avahi_set_log_function(empty_log);
2044
/* Initialize Avahi early so avahi_simple_poll_quit() can be called
2045
from the signal handler */
2046
/* Initialize the pseudo-RNG for Avahi */
2047
srand((unsigned int) time(NULL));
2048
simple_poll = avahi_simple_poll_new();
2049
if(simple_poll == NULL){
2050
fprintf_plus(stderr,
2051
"Avahi: Failed to create simple poll object.\n");
2052
exitcode = EX_UNAVAILABLE;
2056
sigemptyset(&sigterm_action.sa_mask);
2057
ret = sigaddset(&sigterm_action.sa_mask, SIGINT);
2059
perror_plus("sigaddset");
2060
exitcode = EX_OSERR;
2063
ret = sigaddset(&sigterm_action.sa_mask, SIGHUP);
2065
perror_plus("sigaddset");
2066
exitcode = EX_OSERR;
2069
ret = sigaddset(&sigterm_action.sa_mask, SIGTERM);
2071
perror_plus("sigaddset");
2072
exitcode = EX_OSERR;
2075
/* Need to check if the handler is SIG_IGN before handling:
2076
| [[info:libc:Initial Signal Actions]] |
2077
| [[info:libc:Basic Signal Handling]] |
2079
ret = sigaction(SIGINT, NULL, &old_sigterm_action);
2081
perror_plus("sigaction");
2084
if(old_sigterm_action.sa_handler != SIG_IGN){
2085
ret = sigaction(SIGINT, &sigterm_action, NULL);
2087
perror_plus("sigaction");
2088
exitcode = EX_OSERR;
2092
ret = sigaction(SIGHUP, NULL, &old_sigterm_action);
2094
perror_plus("sigaction");
2097
if(old_sigterm_action.sa_handler != SIG_IGN){
2098
ret = sigaction(SIGHUP, &sigterm_action, NULL);
2100
perror_plus("sigaction");
2101
exitcode = EX_OSERR;
2105
ret = sigaction(SIGTERM, NULL, &old_sigterm_action);
2107
perror_plus("sigaction");
2110
if(old_sigterm_action.sa_handler != SIG_IGN){
2111
ret = sigaction(SIGTERM, &sigterm_action, NULL);
2113
perror_plus("sigaction");
2114
exitcode = EX_OSERR;
2119
/* If no interfaces were specified, make a list */
2120
if(interfaces == NULL){
2121
struct dirent **direntries;
2122
/* Look for any good interfaces */
2123
ret = scandir(sys_class_net, &direntries, good_interface,
2126
/* Add all found interfaces to interfaces list */
2127
for(int i = 0; i < ret; ++i){
2128
ret_errno = argz_add(&interfaces, &interfaces_size,
2129
direntries[i]->d_name);
2131
perror_plus("argz_add");
2135
fprintf_plus(stderr, "Will use interface \"%s\"\n",
2136
direntries[i]->d_name);
2142
fprintf_plus(stderr, "Could not find a network interface\n");
2143
exitcode = EXIT_FAILURE;
2148
/* If we only got one interface, explicitly use only that one */
2149
if(argz_count(interfaces, interfaces_size) == 1){
2151
fprintf_plus(stderr, "Using only interface \"%s\"\n",
2154
if_index = (AvahiIfIndex)if_nametoindex(interfaces);
2157
/* Bring up interfaces which are down */
2158
if(not (argz_count(interfaces, interfaces_size) == 1
2159
and strcmp(interfaces, "none") == 0)){
2160
char *interface = NULL;
2161
while((interface = argz_next(interfaces, interfaces_size,
2163
bool interface_was_up = interface_is_up(interface);
2164
ret = bring_up_interface(interface, delay);
2165
if(not interface_was_up){
2168
perror_plus("Failed to bring up interface");
2170
ret_errno = argz_add(&interfaces_to_take_down,
2171
&interfaces_to_take_down_size,
2178
interfaces_size = 0;
2179
if(debug and (interfaces_to_take_down == NULL)){
2180
fprintf_plus(stderr, "No interfaces were brought up\n");
2188
ret = init_gnutls_global(pubkey, seckey);
2190
fprintf_plus(stderr, "init_gnutls_global failed\n");
2191
exitcode = EX_UNAVAILABLE;
997
/* sleep checking until interface is running */
998
for(int i=0; i < delay * 4; i++){
999
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1001
perror("ioctl SIOCGIFFLAGS");
1002
} else if(network.ifr_flags & IFF_RUNNING){
1005
struct timespec sleeptime = { .tv_nsec = 250000000 };
1006
ret = nanosleep(&sleeptime, NULL);
1007
if(ret == -1 and errno != EINTR){
1008
perror("nanosleep");
1011
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1016
/* Restores kernel loglevel to default */
1017
ret = klogctl(7, NULL, 0);
1037
ret = init_gnutls_global(&mc, pubkey, seckey);
1039
fprintf(stderr, "init_gnutls_global failed\n");
1040
exitcode = EXIT_FAILURE;
2194
1043
gnutls_initialized = true;
2201
1046
if(mkdtemp(tempdir) == NULL){
2202
perror_plus("mkdtemp");
2205
1050
tempdir_created = true;
2211
if(not init_gpgme(pubkey, seckey, tempdir)){
2212
fprintf_plus(stderr, "init_gpgme failed\n");
2213
exitcode = EX_UNAVAILABLE;
1052
if(not init_gpgme(&mc, pubkey, seckey, tempdir)){
1053
fprintf(stderr, "init_gpgme failed\n");
1054
exitcode = EXIT_FAILURE;
2216
1057
gpgme_initialized = true;
1060
if_index = (AvahiIfIndex) if_nametoindex(interface);
1062
fprintf(stderr, "No such interface: \"%s\"\n", interface);
1063
exitcode = EXIT_FAILURE;