155
139
gnutls_dh_params_t dh_params;
156
140
const char *priority;
158
server *current_server;
159
142
} mandos_context;
161
144
/* global context so signal handler can reach it*/
162
145
mandos_context mc = { .simple_poll = NULL, .server = NULL,
163
146
.dh_bits = 1024, .priority = "SECURE256"
164
":!CTYPE-X.509:+CTYPE-OPENPGP",
165
.current_server = NULL };
147
":!CTYPE-X.509:+CTYPE-OPENPGP" };
167
149
sig_atomic_t quit_now = 0;
168
150
int signal_received = 0;
170
/* Function to use when printing errors */
171
void perror_plus(const char *print_text){
172
fprintf(stderr, "Mandos plugin %s: ",
173
program_invocation_short_name);
177
int fprintf_plus(FILE *stream, const char *format, ...){
179
va_start (ap, format);
181
TEMP_FAILURE_RETRY(fprintf(stream, "Mandos plugin %s: ",
182
program_invocation_short_name));
183
return TEMP_FAILURE_RETRY(vfprintf(stream, format, ap));
187
153
* Make additional room in "buffer" for at least BUFFER_SIZE more
188
154
* bytes. "buffer_capacity" is how much is currently allocated,
189
155
* "buffer_length" is how much is already used.
191
157
size_t incbuffer(char **buffer, size_t buffer_length,
192
size_t buffer_capacity){
158
size_t buffer_capacity){
193
159
if(buffer_length + BUFFER_SIZE > buffer_capacity){
194
160
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
195
161
if(buffer == NULL){
200
166
return buffer_capacity;
203
/* Add server to set of servers to retry periodically */
204
int add_server(const char *ip, uint16_t port, AvahiIfIndex if_index,
207
server *new_server = malloc(sizeof(server));
208
if(new_server == NULL){
209
perror_plus("malloc");
212
*new_server = (server){ .ip = strdup(ip),
214
.if_index = if_index,
216
if(new_server->ip == NULL){
217
perror_plus("strdup");
220
/* Special case of first server */
221
if (mc.current_server == NULL){
222
new_server->next = new_server;
223
new_server->prev = new_server;
224
mc.current_server = new_server;
225
/* Place the new server last in the list */
227
new_server->next = mc.current_server;
228
new_server->prev = mc.current_server->prev;
229
new_server->prev->next = new_server;
230
mc.current_server->prev = new_server;
232
ret = clock_gettime(CLOCK_MONOTONIC, &mc.current_server->last_seen);
234
perror_plus("clock_gettime");
241
170
* Initialize GPGME.
243
static bool init_gpgme(const char *seckey, const char *pubkey,
244
const char *tempdir){
172
static bool init_gpgme(const char *seckey,
173
const char *pubkey, const char *tempdir){
245
174
gpgme_error_t rc;
246
175
gpgme_engine_info_t engine_info;
257
186
fd = (int)TEMP_FAILURE_RETRY(open(filename, O_RDONLY));
263
192
rc = gpgme_data_new_from_fd(&pgp_data, fd);
264
193
if(rc != GPG_ERR_NO_ERROR){
265
fprintf_plus(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
266
gpgme_strsource(rc), gpgme_strerror(rc));
194
fprintf(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
195
gpgme_strsource(rc), gpgme_strerror(rc));
270
199
rc = gpgme_op_import(mc.ctx, pgp_data);
271
200
if(rc != GPG_ERR_NO_ERROR){
272
fprintf_plus(stderr, "bad gpgme_op_import: %s: %s\n",
273
gpgme_strsource(rc), gpgme_strerror(rc));
201
fprintf(stderr, "bad gpgme_op_import: %s: %s\n",
202
gpgme_strsource(rc), gpgme_strerror(rc));
277
206
ret = (int)TEMP_FAILURE_RETRY(close(fd));
279
perror_plus("close");
281
210
gpgme_data_release(pgp_data);
286
fprintf_plus(stderr, "Initializing GPGME\n");
215
fprintf(stderr, "Initializing GPGME\n");
290
219
gpgme_check_version(NULL);
291
220
rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
292
221
if(rc != GPG_ERR_NO_ERROR){
293
fprintf_plus(stderr, "bad gpgme_engine_check_version: %s: %s\n",
294
gpgme_strsource(rc), gpgme_strerror(rc));
222
fprintf(stderr, "bad gpgme_engine_check_version: %s: %s\n",
223
gpgme_strsource(rc), gpgme_strerror(rc));
298
/* Set GPGME home directory for the OpenPGP engine only */
227
/* Set GPGME home directory for the OpenPGP engine only */
299
228
rc = gpgme_get_engine_info(&engine_info);
300
229
if(rc != GPG_ERR_NO_ERROR){
301
fprintf_plus(stderr, "bad gpgme_get_engine_info: %s: %s\n",
302
gpgme_strsource(rc), gpgme_strerror(rc));
230
fprintf(stderr, "bad gpgme_get_engine_info: %s: %s\n",
231
gpgme_strsource(rc), gpgme_strerror(rc));
305
234
while(engine_info != NULL){
346
273
ssize_t plaintext_length = 0;
349
fprintf_plus(stderr, "Trying to decrypt OpenPGP data\n");
276
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
352
279
/* Create new GPGME data buffer from memory cryptotext */
353
280
rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,
355
282
if(rc != GPG_ERR_NO_ERROR){
356
fprintf_plus(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
357
gpgme_strsource(rc), gpgme_strerror(rc));
283
fprintf(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
284
gpgme_strsource(rc), gpgme_strerror(rc));
361
288
/* Create new empty GPGME data buffer for the plaintext */
362
289
rc = gpgme_data_new(&dh_plain);
363
290
if(rc != GPG_ERR_NO_ERROR){
364
fprintf_plus(stderr, "Mandos plugin mandos-client: "
365
"bad gpgme_data_new: %s: %s\n",
366
gpgme_strsource(rc), gpgme_strerror(rc));
291
fprintf(stderr, "bad gpgme_data_new: %s: %s\n",
292
gpgme_strsource(rc), gpgme_strerror(rc));
367
293
gpgme_data_release(dh_crypto);
373
299
rc = gpgme_op_decrypt(mc.ctx, dh_crypto, dh_plain);
374
300
if(rc != GPG_ERR_NO_ERROR){
375
fprintf_plus(stderr, "bad gpgme_op_decrypt: %s: %s\n",
376
gpgme_strsource(rc), gpgme_strerror(rc));
301
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
302
gpgme_strsource(rc), gpgme_strerror(rc));
377
303
plaintext_length = -1;
379
305
gpgme_decrypt_result_t result;
380
306
result = gpgme_op_decrypt_result(mc.ctx);
381
307
if(result == NULL){
382
fprintf_plus(stderr, "gpgme_op_decrypt_result failed\n");
308
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
384
fprintf_plus(stderr, "Unsupported algorithm: %s\n",
385
result->unsupported_algorithm);
386
fprintf_plus(stderr, "Wrong key usage: %u\n",
387
result->wrong_key_usage);
310
fprintf(stderr, "Unsupported algorithm: %s\n",
311
result->unsupported_algorithm);
312
fprintf(stderr, "Wrong key usage: %u\n",
313
result->wrong_key_usage);
388
314
if(result->file_name != NULL){
389
fprintf_plus(stderr, "File name: %s\n", result->file_name);
315
fprintf(stderr, "File name: %s\n", result->file_name);
391
317
gpgme_recipient_t recipient;
392
318
recipient = result->recipients;
393
319
while(recipient != NULL){
394
fprintf_plus(stderr, "Public key algorithm: %s\n",
395
gpgme_pubkey_algo_name
396
(recipient->pubkey_algo));
397
fprintf_plus(stderr, "Key ID: %s\n", recipient->keyid);
398
fprintf_plus(stderr, "Secret key available: %s\n",
399
recipient->status == GPG_ERR_NO_SECKEY
320
fprintf(stderr, "Public key algorithm: %s\n",
321
gpgme_pubkey_algo_name(recipient->pubkey_algo));
322
fprintf(stderr, "Key ID: %s\n", recipient->keyid);
323
fprintf(stderr, "Secret key available: %s\n",
324
recipient->status == GPG_ERR_NO_SECKEY
401
326
recipient = recipient->next;
500
425
/* OpenPGP credentials */
501
ret = gnutls_certificate_allocate_credentials(&mc.cred);
426
gnutls_certificate_allocate_credentials(&mc.cred);
502
427
if(ret != GNUTLS_E_SUCCESS){
503
fprintf_plus(stderr, "GnuTLS memory error: %s\n",
504
safer_gnutls_strerror(ret));
428
fprintf(stderr, "GnuTLS memory error: %s\n", /* Spurious warning
432
safer_gnutls_strerror(ret));
505
433
gnutls_global_deinit();
510
fprintf_plus(stderr, "Attempting to use OpenPGP public key %s and"
511
" secret key %s as GnuTLS credentials\n",
438
fprintf(stderr, "Attempting to use OpenPGP public key %s and"
439
" secret key %s as GnuTLS credentials\n", pubkeyfilename,
516
443
ret = gnutls_certificate_set_openpgp_key_file
517
444
(mc.cred, pubkeyfilename, seckeyfilename,
518
445
GNUTLS_OPENPGP_FMT_BASE64);
519
446
if(ret != GNUTLS_E_SUCCESS){
521
"Error[%d] while reading the OpenPGP key pair ('%s',"
522
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
523
fprintf_plus(stderr, "The GnuTLS error is: %s\n",
524
safer_gnutls_strerror(ret));
448
"Error[%d] while reading the OpenPGP key pair ('%s',"
449
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
450
fprintf(stderr, "The GnuTLS error is: %s\n",
451
safer_gnutls_strerror(ret));
528
455
/* GnuTLS server initialization */
529
456
ret = gnutls_dh_params_init(&mc.dh_params);
530
457
if(ret != GNUTLS_E_SUCCESS){
531
fprintf_plus(stderr, "Error in GnuTLS DH parameter"
532
" initialization: %s\n",
533
safer_gnutls_strerror(ret));
458
fprintf(stderr, "Error in GnuTLS DH parameter initialization:"
459
" %s\n", safer_gnutls_strerror(ret));
536
462
ret = gnutls_dh_params_generate2(mc.dh_params, mc.dh_bits);
537
463
if(ret != GNUTLS_E_SUCCESS){
538
fprintf_plus(stderr, "Error in GnuTLS prime generation: %s\n",
539
safer_gnutls_strerror(ret));
464
fprintf(stderr, "Error in GnuTLS prime generation: %s\n",
465
safer_gnutls_strerror(ret));
726
651
if(af == AF_INET6 and if_index != AVAHI_IF_UNSPEC){
727
652
char interface[IF_NAMESIZE];
728
653
if(if_indextoname((unsigned int)if_index, interface) == NULL){
729
perror_plus("if_indextoname");
654
perror("if_indextoname");
731
fprintf_plus(stderr, "Connection to: %s%%%s, port %" PRIu16
732
"\n", ip, interface, port);
656
fprintf(stderr, "Connection to: %s%%%s, port %" PRIu16 "\n",
657
ip, interface, port);
735
fprintf_plus(stderr, "Connection to: %s, port %" PRIu16 "\n",
660
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
738
663
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
739
664
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
1020
944
char ip[AVAHI_ADDRESS_STR_MAX];
1021
945
avahi_address_snprint(ip, sizeof(ip), address);
1023
fprintf_plus(stderr, "Mandos server \"%s\" found on %s (%s, %"
1024
PRIdMAX ") on port %" PRIu16 "\n", name,
1025
host_name, ip, (intmax_t)interface, port);
947
fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %"
948
PRIdMAX ") on port %" PRIu16 "\n", name, host_name,
949
ip, (intmax_t)interface, port);
1027
951
int ret = start_mandos_communication(ip, port, interface,
1028
952
avahi_proto_to_af(proto));
1030
954
avahi_simple_poll_quit(mc.simple_poll);
1032
ret = add_server(ip, port, interface,
1033
avahi_proto_to_af(proto));
1101
1020
signal_received = sig;
1102
1021
int old_errno = errno;
1103
/* set main loop to exit */
1104
1022
if(mc.simple_poll != NULL){
1105
1023
avahi_simple_poll_quit(mc.simple_poll);
1107
1025
errno = old_errno;
1110
bool get_flags(const char *ifname, struct ifreq *ifr){
1113
int s = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1115
perror_plus("socket");
1118
strcpy(ifr->ifr_name, ifname);
1119
ret = ioctl(s, SIOCGIFFLAGS, ifr);
1029
* This function determines if a directory entry in /sys/class/net
1030
* corresponds to an acceptable network device.
1031
* (This function is passed to scandir(3) as a filter function.)
1033
int good_interface(const struct dirent *if_entry){
1035
char *flagname = NULL;
1036
if(if_entry->d_name[0] == '.'){
1039
int ret = asprintf(&flagname, "%s/%s/flags", sys_class_net,
1045
int flags_fd = (int)TEMP_FAILURE_RETRY(open(flagname, O_RDONLY));
1052
typedef short ifreq_flags; /* ifreq.ifr_flags in netdevice(7) */
1053
/* read line from flags_fd */
1054
ssize_t to_read = (sizeof(ifreq_flags)*2)+3; /* "0x1003\n" */
1055
char *flagstring = malloc((size_t)to_read+1); /* +1 for final \0 */
1056
flagstring[(size_t)to_read] = '\0';
1057
if(flagstring == NULL){
1063
ssret = (ssize_t)TEMP_FAILURE_RETRY(read(flags_fd, flagstring,
1080
tmpmax = strtoimax(flagstring, &tmp, 0);
1081
if(errno != 0 or tmp == flagstring or (*tmp != '\0'
1082
and not (isspace(*tmp)))
1083
or tmpmax != (ifreq_flags)tmpmax){
1122
perror_plus("ioctl SIOCGIFFLAGS");
1085
fprintf(stderr, "Invalid flags \"%s\" for interface \"%s\"\n",
1086
flagstring, if_entry->d_name);
1129
bool good_flags(const char *ifname, const struct ifreq *ifr){
1092
ifreq_flags flags = (ifreq_flags)tmpmax;
1131
1093
/* Reject the loopback device */
1132
if(ifr->ifr_flags & IFF_LOOPBACK){
1094
if(flags & IFF_LOOPBACK){
1134
fprintf_plus(stderr, "Rejecting loopback interface \"%s\"\n",
1096
fprintf(stderr, "Rejecting loopback interface \"%s\"\n",
1139
1101
/* Accept point-to-point devices only if connect_to is specified */
1140
if(connect_to != NULL and (ifr->ifr_flags & IFF_POINTOPOINT)){
1102
if(connect_to != NULL and (flags & IFF_POINTOPOINT)){
1142
fprintf_plus(stderr, "Accepting point-to-point interface"
1143
" \"%s\"\n", ifname);
1104
fprintf(stderr, "Accepting point-to-point interface \"%s\"\n",
1147
1109
/* Otherwise, reject non-broadcast-capable devices */
1148
if(not (ifr->ifr_flags & IFF_BROADCAST)){
1110
if(not (flags & IFF_BROADCAST)){
1150
fprintf_plus(stderr, "Rejecting non-broadcast interface"
1151
" \"%s\"\n", ifname);
1112
fprintf(stderr, "Rejecting non-broadcast interface \"%s\"\n",
1155
1117
/* Reject non-ARP interfaces (including dummy interfaces) */
1156
if(ifr->ifr_flags & IFF_NOARP){
1118
if(flags & IFF_NOARP){
1158
fprintf_plus(stderr, "Rejecting non-ARP interface \"%s\"\n",
1120
fprintf(stderr, "Rejecting non-ARP interface \"%s\"\n",
1164
1125
/* Accept this device */
1166
fprintf_plus(stderr, "Interface \"%s\" is good\n", ifname);
1172
* This function determines if a directory entry in /sys/class/net
1173
* corresponds to an acceptable network device.
1174
* (This function is passed to scandir(3) as a filter function.)
1176
int good_interface(const struct dirent *if_entry){
1177
if(if_entry->d_name[0] == '.'){
1182
if(not get_flags(if_entry->d_name, &ifr)){
1184
fprintf_plus(stderr, "Failed to get flags for interface "
1185
"\"%s\"\n", if_entry->d_name);
1190
if(not good_flags(if_entry->d_name, &ifr)){
1197
* This function determines if a directory entry in /sys/class/net
1198
* corresponds to an acceptable network device which is up.
1199
* (This function is passed to scandir(3) as a filter function.)
1201
int up_interface(const struct dirent *if_entry){
1202
if(if_entry->d_name[0] == '.'){
1207
if(not get_flags(if_entry->d_name, &ifr)){
1209
fprintf_plus(stderr, "Failed to get flags for interface "
1210
"\"%s\"\n", if_entry->d_name);
1215
/* Reject down interfaces */
1216
if(not (ifr.ifr_flags & IFF_UP)){
1218
fprintf_plus(stderr, "Rejecting down interface \"%s\"\n",
1224
/* Reject non-running interfaces */
1225
if(not (ifr.ifr_flags & IFF_RUNNING)){
1227
fprintf_plus(stderr, "Rejecting non-running interface \"%s\"\n",
1233
if(not good_flags(if_entry->d_name, &ifr)){
1127
fprintf(stderr, "Interface \"%s\" is acceptable\n",
1250
/* Is this directory entry a runnable program? */
1251
int runnable_hook(const struct dirent *direntry){
1256
if((direntry->d_name)[0] == '\0'){
1261
sret = strspn(direntry->d_name, "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
1262
"abcdefghijklmnopqrstuvwxyz"
1265
if((direntry->d_name)[sret] != '\0'){
1266
/* Contains non-allowed characters */
1268
fprintf_plus(stderr, "Ignoring hook \"%s\" with bad name\n",
1274
char *fullname = NULL;
1275
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1277
perror_plus("asprintf");
1281
ret = stat(fullname, &st);
1284
perror_plus("Could not stat hook");
1288
if(not (S_ISREG(st.st_mode))){
1289
/* Not a regular file */
1291
fprintf_plus(stderr, "Ignoring hook \"%s\" - not a file\n",
1296
if(not (st.st_mode & (S_IXUSR | S_IXGRP | S_IXOTH))){
1297
/* Not executable */
1299
fprintf_plus(stderr, "Ignoring hook \"%s\" - not executable\n",
1305
fprintf_plus(stderr, "Hook \"%s\" is acceptable\n",
1311
int avahi_loop_with_timeout(AvahiSimplePoll *s, int retry_interval){
1313
struct timespec now;
1314
struct timespec waited_time;
1315
intmax_t block_time;
1318
if(mc.current_server == NULL){
1320
fprintf_plus(stderr, "Wait until first server is found."
1323
ret = avahi_simple_poll_iterate(s, -1);
1326
fprintf_plus(stderr, "Check current_server if we should run"
1329
/* the current time */
1330
ret = clock_gettime(CLOCK_MONOTONIC, &now);
1332
perror_plus("clock_gettime");
1335
/* Calculating in ms how long time between now and server
1336
who we visted longest time ago. Now - last seen. */
1337
waited_time.tv_sec = (now.tv_sec
1338
- mc.current_server->last_seen.tv_sec);
1339
waited_time.tv_nsec = (now.tv_nsec
1340
- mc.current_server->last_seen.tv_nsec);
1341
/* total time is 10s/10,000ms.
1342
Converting to s from ms by dividing by 1,000,
1343
and ns to ms by dividing by 1,000,000. */
1344
block_time = ((retry_interval
1345
- ((intmax_t)waited_time.tv_sec * 1000))
1346
- ((intmax_t)waited_time.tv_nsec / 1000000));
1349
fprintf_plus(stderr, "Blocking for %" PRIdMAX " ms\n",
1353
if(block_time <= 0){
1354
ret = start_mandos_communication(mc.current_server->ip,
1355
mc.current_server->port,
1356
mc.current_server->if_index,
1357
mc.current_server->af);
1359
avahi_simple_poll_quit(mc.simple_poll);
1362
ret = clock_gettime(CLOCK_MONOTONIC,
1363
&mc.current_server->last_seen);
1365
perror_plus("clock_gettime");
1368
mc.current_server = mc.current_server->next;
1369
block_time = 0; /* Call avahi to find new Mandos
1370
servers, but don't block */
1373
ret = avahi_simple_poll_iterate(s, (int)block_time);
1376
if (ret > 0 or errno != EINTR){
1377
return (ret != 1) ? ret : 0;
1383
bool run_network_hooks(const char *mode, const char *interface,
1385
struct dirent **direntries;
1386
struct dirent *direntry;
1388
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1391
perror_plus("scandir");
1393
int devnull = open("/dev/null", O_RDONLY);
1394
for(int i = 0; i < numhooks; i++){
1395
direntry = direntries[i];
1396
char *fullname = NULL;
1397
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1399
perror_plus("asprintf");
1403
fprintf_plus(stderr, "Running network hook \"%s\"\n",
1406
pid_t hook_pid = fork();
1409
dup2(devnull, STDIN_FILENO);
1411
dup2(STDERR_FILENO, STDOUT_FILENO);
1412
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1414
perror_plus("setenv");
1417
ret = setenv("DEVICE", interface, 1);
1419
perror_plus("setenv");
1422
ret = setenv("VERBOSE", debug ? "1" : "0", 1);
1424
perror_plus("setenv");
1427
ret = setenv("MODE", mode, 1);
1429
perror_plus("setenv");
1433
ret = asprintf(&delaystring, "%f", delay);
1435
perror_plus("asprintf");
1438
ret = setenv("DELAY", delaystring, 1);
1441
perror_plus("setenv");
1445
ret = execl(fullname, direntry->d_name, mode, NULL);
1446
perror_plus("execl");
1449
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
1450
perror_plus("waitpid");
1454
if(WIFEXITED(status)){
1455
if(WEXITSTATUS(status) != 0){
1456
fprintf_plus(stderr, "Warning: network hook \"%s\" exited"
1457
" with status %d\n", direntry->d_name,
1458
WEXITSTATUS(status));
1462
} else if(WIFSIGNALED(status)){
1463
fprintf_plus(stderr, "Warning: network hook \"%s\" died by"
1464
" signal %d\n", direntry->d_name,
1469
fprintf_plus(stderr, "Warning: network hook \"%s\""
1470
" crashed\n", direntry->d_name);
1477
fprintf_plus(stderr, "Network hook \"%s\" ran successfully\n",
1486
1144
int main(int argc, char *argv[]){
1487
1145
AvahiSServiceBrowser *sb = NULL;
1682
/* Work around Debian bug #633582:
1683
<http://bugs.debian.org/633582> */
1686
/* Re-raise priviliges */
1690
perror_plus("seteuid");
1693
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
1694
int seckey_fd = open(seckey, O_RDONLY);
1695
if(seckey_fd == -1){
1696
perror_plus("open");
1698
ret = (int)TEMP_FAILURE_RETRY(fstat(seckey_fd, &st));
1700
perror_plus("fstat");
1702
if(S_ISREG(st.st_mode)
1703
and st.st_uid == 0 and st.st_gid == 0){
1704
ret = fchown(seckey_fd, uid, gid);
1706
perror_plus("fchown");
1710
TEMP_FAILURE_RETRY(close(seckey_fd));
1714
if(strcmp(pubkey, PATHDIR "/" PUBKEY) == 0){
1715
int pubkey_fd = open(pubkey, O_RDONLY);
1716
if(pubkey_fd == -1){
1717
perror_plus("open");
1719
ret = (int)TEMP_FAILURE_RETRY(fstat(pubkey_fd, &st));
1721
perror_plus("fstat");
1723
if(S_ISREG(st.st_mode)
1724
and st.st_uid == 0 and st.st_gid == 0){
1725
ret = fchown(pubkey_fd, uid, gid);
1727
perror_plus("fchown");
1731
TEMP_FAILURE_RETRY(close(pubkey_fd));
1735
/* Lower privileges */
1739
perror_plus("seteuid");
1743
/* Run network hooks */
1746
/* Re-raise priviliges */
1750
perror_plus("seteuid");
1753
if(not run_network_hooks("start", interface, delay)){
1757
/* Lower privileges */
1761
perror_plus("seteuid");
1767
1317
avahi_set_log_function(empty_log);
1770
1320
if(interface[0] == '\0'){
1771
1321
struct dirent **direntries;
1772
/* First look for interfaces that are up */
1773
ret = scandir(sys_class_net, &direntries, up_interface,
1322
ret = scandir(sys_class_net, &direntries, good_interface,
1776
/* No up interfaces, look for any good interfaces */
1778
ret = scandir(sys_class_net, &direntries, good_interface,
1782
/* Pick the first interface returned */
1325
/* Pick the first good interface */
1783
1326
interface = strdup(direntries[0]->d_name);
1785
fprintf_plus(stderr, "Using interface \"%s\"\n", interface);
1328
fprintf(stderr, "Using interface \"%s\"\n", interface);
1787
1330
if(interface == NULL){
1788
perror_plus("malloc");
1789
1332
free(direntries);
1790
1333
exitcode = EXIT_FAILURE;
1837
1379
ret = sigaction(SIGINT, NULL, &old_sigterm_action);
1839
perror_plus("sigaction");
1381
perror("sigaction");
1840
1382
return EX_OSERR;
1842
1384
if(old_sigterm_action.sa_handler != SIG_IGN){
1843
1385
ret = sigaction(SIGINT, &sigterm_action, NULL);
1845
perror_plus("sigaction");
1387
perror("sigaction");
1846
1388
exitcode = EX_OSERR;
1850
1392
ret = sigaction(SIGHUP, NULL, &old_sigterm_action);
1852
perror_plus("sigaction");
1394
perror("sigaction");
1853
1395
return EX_OSERR;
1855
1397
if(old_sigterm_action.sa_handler != SIG_IGN){
1856
1398
ret = sigaction(SIGHUP, &sigterm_action, NULL);
1858
perror_plus("sigaction");
1400
perror("sigaction");
1859
1401
exitcode = EX_OSERR;
1863
1405
ret = sigaction(SIGTERM, NULL, &old_sigterm_action);
1865
perror_plus("sigaction");
1407
perror("sigaction");
1866
1408
return EX_OSERR;
1868
1410
if(old_sigterm_action.sa_handler != SIG_IGN){
1869
1411
ret = sigaction(SIGTERM, &sigterm_action, NULL);
1871
perror_plus("sigaction");
1413
perror("sigaction");
1872
1414
exitcode = EX_OSERR;
2206
1740
gpgme_release(mc.ctx);
2209
/* Cleans up the circular linked list of Mandos servers the client
2211
if(mc.current_server != NULL){
2212
mc.current_server->prev->next = NULL;
2213
while(mc.current_server != NULL){
2214
server *next = mc.current_server->next;
2215
free(mc.current_server);
2216
mc.current_server = next;
2220
/* Re-raise priviliges */
2226
perror_plus("seteuid");
2230
/* Run network hooks */
2231
run_network_hooks("stop", interface, delay);
2233
/* Take down the network interface */
2234
if(take_down_interface and geteuid() == 0){
1743
/* Take down the network interface */
1744
if(take_down_interface){
1745
/* Re-raise priviliges */
2235
1752
ret = ioctl(sd, SIOCGIFFLAGS, &network);
2237
perror_plus("ioctl SIOCGIFFLAGS");
2238
} else if(network.ifr_flags & IFF_UP){
1754
perror("ioctl SIOCGIFFLAGS");
1755
} else if(network.ifr_flags & IFF_UP) {
2239
1756
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
2240
1757
ret = ioctl(sd, SIOCSIFFLAGS, &network);
2242
perror_plus("ioctl SIOCSIFFLAGS -IFF_UP");
1759
perror("ioctl SIOCSIFFLAGS -IFF_UP");
2245
1762
ret = (int)TEMP_FAILURE_RETRY(close(sd));
2247
perror_plus("close");
2252
/* Lower privileges permanently */
2256
perror_plus("setuid");
1766
/* Lower privileges permanently */
2261
1776
if(tempdir_created){
2262
1777
struct dirent **direntries = NULL;
2263
1778
struct dirent *direntry = NULL;
2264
int numentries = scandir(tempdir, &direntries, notdotentries,
2266
if (numentries > 0){
2267
for(int i = 0; i < numentries; i++){
1779
ret = scandir(tempdir, &direntries, notdotentries, alphasort);
1781
for(int i = 0; i < ret; i++){
2268
1782
direntry = direntries[i];
2269
1783
char *fullname = NULL;
2270
1784
ret = asprintf(&fullname, "%s/%s", tempdir,
2271
1785
direntry->d_name);
2273
perror_plus("asprintf");
2276
1790
ret = remove(fullname);
2278
fprintf_plus(stderr, "remove(\"%s\"): %s\n", fullname,
1792
fprintf(stderr, "remove(\"%s\"): %s\n", fullname,
2281
1795
free(fullname);
2285
/* need to clean even if 0 because man page doesn't specify */
1799
/* need to be cleaned even if ret == 0 because man page dont specify */
2286
1800
free(direntries);
2287
if (numentries == -1){
2288
perror_plus("scandir");
2290
1804
ret = rmdir(tempdir);
2291
1805
if(ret == -1 and errno != ENOENT){
2292
perror_plus("rmdir");