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- Committer: Teddy Hogeborn
- Date: 2015-05-23 10:41:35 UTC
- Revision ID: teddy@recompile.se-20150523104135-s08sbkurj1wf0jrz
mandos-keygen: Update copyright year.
- files added:
- debian/upstream
- files modified:
- DBUS-API
added
removed
plugins.d/mandos-client.c
9
9
* "browse_callback", and parts of "main".
10
10
*
11
11
* Everything else is
12
* Copyright © 2008-2012 Teddy Hogeborn
13
* Copyright © 2008-2012 Björn Påhlsson
12
* Copyright © 2008-2014 Teddy Hogeborn
13
* Copyright © 2008-2014 Björn Påhlsson
14
14
*
15
15
* This program is free software: you can redistribute it and/or
16
16
* modify it under the terms of the GNU General Public License as
32
32
/* Needed by GPGME, specifically gpgme_data_seek() */
33
33
#ifndef _LARGEFILE_SOURCE
34
34
#define _LARGEFILE_SOURCE
35
#endif
35
#endif /* not _LARGEFILE_SOURCE */
36
36
#ifndef _FILE_OFFSET_BITS
37
37
#define _FILE_OFFSET_BITS 64
38
#endif
38
#endif /* not _FILE_OFFSET_BITS */
39
39
40
40
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), asprintf() */
41
41
42
42
#include <stdio.h> /* fprintf(), stderr, fwrite(),
43
stdout, ferror(), remove() */
43
stdout, ferror() */
44
44
#include <stdint.h> /* uint16_t, uint32_t, intptr_t */
45
45
#include <stddef.h> /* NULL, size_t, ssize_t */
46
46
#include <stdlib.h> /* free(), EXIT_SUCCESS, srand(),
55
55
opendir(), DIR */
56
56
#include <sys/stat.h> /* open(), S_ISREG */
57
57
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
58
inet_pton(), connect() */
59
#include <fcntl.h> /* open() */
58
inet_pton(), connect(),
59
getnameinfo() */
60
#include <fcntl.h> /* open(), unlinkat() */
60
61
#include <dirent.h> /* opendir(), struct dirent, readdir()
61
62
*/
62
63
#include <inttypes.h> /* PRIu16, PRIdMAX, intmax_t,
72
73
*/
73
74
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
74
75
getuid(), getgid(), seteuid(),
75
setgid(), pause(), _exit() */
76
#include <arpa/inet.h> /* inet_pton(), htons, inet_ntop() */
76
setgid(), pause(), _exit(),
77
unlinkat() */
78
#include <arpa/inet.h> /* inet_pton(), htons() */
77
79
#include <iso646.h> /* not, or, and */
78
80
#include <argp.h> /* struct argp_option, error_t, struct
79
81
argp_state, struct argp,
91
93
argz_delete(), argz_append(),
92
94
argz_stringify(), argz_add(),
93
95
argz_count() */
96
#include <netdb.h> /* getnameinfo(), NI_NUMERICHOST,
97
EAI_SYSTEM, gai_strerror() */
94
98
95
99
#ifdef __linux__
96
100
#include <sys/klog.h> /* klogctl() */
138
142
static const char sys_class_net[] = "/sys/class/net";
139
143
char *connect_to = NULL;
140
144
const char *hookdir = HOOKDIR;
145
int hookdir_fd = -1;
141
146
uid_t uid = 65534;
142
147
gid_t gid = 65534;
143
148
154
159
155
160
/* Used for passing in values through the Avahi callback functions */
156
161
typedef struct {
157
AvahiSimplePoll *simple_poll;
158
162
AvahiServer *server;
159
163
gnutls_certificate_credentials_t cred;
160
164
unsigned int dh_bits;
162
166
const char *priority;
163
167
gpgme_ctx_t ctx;
164
168
server *current_server;
169
char *interfaces;
170
size_t interfaces_size;
165
171
} mandos_context;
166
172
167
/* global context so signal handler can reach it*/
168
mandos_context mc = { .simple_poll = NULL, .server = NULL,
169
.dh_bits = 1024, .priority = "SECURE256"
170
":!CTYPE-X.509:+CTYPE-OPENPGP",
171
.current_server = NULL };
173
/* global so signal handler can reach it*/
174
AvahiSimplePoll *simple_poll;
172
175
173
176
sig_atomic_t quit_now = 0;
174
177
int signal_received = 0;
182
185
perror(print_text);
183
186
}
184
187
185
__attribute__((format (gnu_printf, 2, 3)))
188
__attribute__((format (gnu_printf, 2, 3), nonnull))
186
189
int fprintf_plus(FILE *stream, const char *format, ...){
187
190
va_list ap;
188
191
va_start (ap, format);
189
192
190
193
TEMP_FAILURE_RETRY(fprintf(stream, "Mandos plugin %s: ",
191
194
program_invocation_short_name));
192
return TEMP_FAILURE_RETRY(vfprintf(stream, format, ap));
195
return (int)TEMP_FAILURE_RETRY(vfprintf(stream, format, ap));
193
196
}
194
197
195
198
/*
197
200
* bytes. "buffer_capacity" is how much is currently allocated,
198
201
* "buffer_length" is how much is already used.
199
202
*/
203
__attribute__((nonnull, warn_unused_result))
200
204
size_t incbuffer(char **buffer, size_t buffer_length,
201
205
size_t buffer_capacity){
202
206
if(buffer_length + BUFFER_SIZE > buffer_capacity){
203
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
204
if(buffer == NULL){
207
char *new_buf = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
208
if(new_buf == NULL){
209
int old_errno = errno;
210
free(*buffer);
211
errno = old_errno;
212
*buffer = NULL;
205
213
return 0;
206
214
}
215
*buffer = new_buf;
207
216
buffer_capacity += BUFFER_SIZE;
208
217
}
209
218
return buffer_capacity;
210
219
}
211
220
212
221
/* Add server to set of servers to retry periodically */
222
__attribute__((nonnull, warn_unused_result))
213
223
bool add_server(const char *ip, in_port_t port, AvahiIfIndex if_index,
214
int af){
224
int af, server **current_server){
215
225
int ret;
216
226
server *new_server = malloc(sizeof(server));
217
227
if(new_server == NULL){
224
234
.af = af };
225
235
if(new_server->ip == NULL){
226
236
perror_plus("strdup");
237
free(new_server);
238
return false;
239
}
240
ret = clock_gettime(CLOCK_MONOTONIC, &(new_server->last_seen));
241
if(ret == -1){
242
perror_plus("clock_gettime");
243
#ifdef __GNUC__
244
#pragma GCC diagnostic push
245
#pragma GCC diagnostic ignored "-Wcast-qual"
246
#endif
247
free((char *)(new_server->ip));
248
#ifdef __GNUC__
249
#pragma GCC diagnostic pop
250
#endif
251
free(new_server);
227
252
return false;
228
253
}
229
254
/* Special case of first server */
230
if (mc.current_server == NULL){
255
if(*current_server == NULL){
231
256
new_server->next = new_server;
232
257
new_server->prev = new_server;
233
mc.current_server = new_server;
234
/* Place the new server last in the list */
258
*current_server = new_server;
235
259
} else {
236
new_server->next = mc.current_server;
237
new_server->prev = mc.current_server->prev;
260
/* Place the new server last in the list */
261
new_server->next = *current_server;
262
new_server->prev = (*current_server)->prev;
238
263
new_server->prev->next = new_server;
239
mc.current_server->prev = new_server;
240
}
241
ret = clock_gettime(CLOCK_MONOTONIC, &mc.current_server->last_seen);
242
if(ret == -1){
243
perror_plus("clock_gettime");
244
return false;
264
(*current_server)->prev = new_server;
245
265
}
246
266
return true;
247
267
}
249
269
/*
250
270
* Initialize GPGME.
251
271
*/
252
static bool init_gpgme(const char *seckey, const char *pubkey,
253
const char *tempdir){
272
__attribute__((nonnull, warn_unused_result))
273
static bool init_gpgme(const char * const seckey,
274
const char * const pubkey,
275
const char * const tempdir,
276
mandos_context *mc){
254
277
gpgme_error_t rc;
255
278
gpgme_engine_info_t engine_info;
256
279
257
258
280
/*
259
281
* Helper function to insert pub and seckey to the engine keyring.
260
282
*/
261
bool import_key(const char *filename){
283
bool import_key(const char * const filename){
262
284
int ret;
263
285
int fd;
264
286
gpgme_data_t pgp_data;
276
298
return false;
277
299
}
278
300
279
rc = gpgme_op_import(mc.ctx, pgp_data);
301
rc = gpgme_op_import(mc->ctx, pgp_data);
280
302
if(rc != GPG_ERR_NO_ERROR){
281
303
fprintf_plus(stderr, "bad gpgme_op_import: %s: %s\n",
282
304
gpgme_strsource(rc), gpgme_strerror(rc));
326
348
}
327
349
328
350
/* Create new GPGME "context" */
329
rc = gpgme_new(&(mc.ctx));
351
rc = gpgme_new(&(mc->ctx));
330
352
if(rc != GPG_ERR_NO_ERROR){
331
353
fprintf_plus(stderr, "Mandos plugin mandos-client: "
332
354
"bad gpgme_new: %s: %s\n", gpgme_strsource(rc),
345
367
* Decrypt OpenPGP data.
346
368
* Returns -1 on error
347
369
*/
370
__attribute__((nonnull, warn_unused_result))
348
371
static ssize_t pgp_packet_decrypt(const char *cryptotext,
349
372
size_t crypto_size,
350
char **plaintext){
373
char **plaintext,
374
mandos_context *mc){
351
375
gpgme_data_t dh_crypto, dh_plain;
352
376
gpgme_error_t rc;
353
377
ssize_t ret;
379
403
380
404
/* Decrypt data from the cryptotext data buffer to the plaintext
381
405
data buffer */
382
rc = gpgme_op_decrypt(mc.ctx, dh_crypto, dh_plain);
406
rc = gpgme_op_decrypt(mc->ctx, dh_crypto, dh_plain);
383
407
if(rc != GPG_ERR_NO_ERROR){
384
408
fprintf_plus(stderr, "bad gpgme_op_decrypt: %s: %s\n",
385
409
gpgme_strsource(rc), gpgme_strerror(rc));
386
410
plaintext_length = -1;
387
411
if(debug){
388
412
gpgme_decrypt_result_t result;
389
result = gpgme_op_decrypt_result(mc.ctx);
413
result = gpgme_op_decrypt_result(mc->ctx);
390
414
if(result == NULL){
391
415
fprintf_plus(stderr, "gpgme_op_decrypt_result failed\n");
392
416
} else {
469
493
return plaintext_length;
470
494
}
471
495
472
static const char * safer_gnutls_strerror(int value){
496
__attribute__((warn_unused_result, const))
497
static const char *safe_string(const char *str){
498
if(str == NULL)
499
return "(unknown)";
500
return str;
501
}
502
503
__attribute__((warn_unused_result))
504
static const char *safer_gnutls_strerror(int value){
473
505
const char *ret = gnutls_strerror(value);
474
if(ret == NULL)
475
ret = "(unknown)";
476
return ret;
506
return safe_string(ret);
477
507
}
478
508
479
509
/* GnuTLS log function callback */
510
__attribute__((nonnull))
480
511
static void debuggnutls(__attribute__((unused)) int level,
481
512
const char* string){
482
513
fprintf_plus(stderr, "GnuTLS: %s", string);
483
514
}
484
515
516
__attribute__((nonnull, warn_unused_result))
485
517
static int init_gnutls_global(const char *pubkeyfilename,
486
const char *seckeyfilename){
518
const char *seckeyfilename,
519
mandos_context *mc){
487
520
int ret;
521
unsigned int uret;
488
522
489
523
if(debug){
490
524
fprintf_plus(stderr, "Initializing GnuTLS\n");
506
540
}
507
541
508
542
/* OpenPGP credentials */
509
ret = gnutls_certificate_allocate_credentials(&mc.cred);
543
ret = gnutls_certificate_allocate_credentials(&mc->cred);
510
544
if(ret != GNUTLS_E_SUCCESS){
511
545
fprintf_plus(stderr, "GnuTLS memory error: %s\n",
512
546
safer_gnutls_strerror(ret));
522
556
}
523
557
524
558
ret = gnutls_certificate_set_openpgp_key_file
525
(mc.cred, pubkeyfilename, seckeyfilename,
559
(mc->cred, pubkeyfilename, seckeyfilename,
526
560
GNUTLS_OPENPGP_FMT_BASE64);
527
561
if(ret != GNUTLS_E_SUCCESS){
528
562
fprintf_plus(stderr,
534
568
}
535
569
536
570
/* GnuTLS server initialization */
537
ret = gnutls_dh_params_init(&mc.dh_params);
571
ret = gnutls_dh_params_init(&mc->dh_params);
538
572
if(ret != GNUTLS_E_SUCCESS){
539
573
fprintf_plus(stderr, "Error in GnuTLS DH parameter"
540
574
" initialization: %s\n",
541
575
safer_gnutls_strerror(ret));
542
576
goto globalfail;
543
577
}
544
ret = gnutls_dh_params_generate2(mc.dh_params, mc.dh_bits);
578
if(mc->dh_bits == 0){
579
/* Find out the optimal number of DH bits */
580
/* Try to read the private key file */
581
gnutls_datum_t buffer = { .data = NULL, .size = 0 };
582
{
583
int secfile = open(seckeyfilename, O_RDONLY);
584
size_t buffer_capacity = 0;
585
while(true){
586
buffer_capacity = incbuffer((char **)&buffer.data,
587
(size_t)buffer.size,
588
(size_t)buffer_capacity);
589
if(buffer_capacity == 0){
590
perror_plus("incbuffer");
591
free(buffer.data);
592
buffer.data = NULL;
593
break;
594
}
595
ssize_t bytes_read = read(secfile, buffer.data + buffer.size,
596
BUFFER_SIZE);
597
/* EOF */
598
if(bytes_read == 0){
599
break;
600
}
601
/* check bytes_read for failure */
602
if(bytes_read < 0){
603
perror_plus("read");
604
free(buffer.data);
605
buffer.data = NULL;
606
break;
607
}
608
buffer.size += (unsigned int)bytes_read;
609
}
610
close(secfile);
611
}
612
/* If successful, use buffer to parse private key */
613
gnutls_sec_param_t sec_param = GNUTLS_SEC_PARAM_ULTRA;
614
if(buffer.data != NULL){
615
{
616
gnutls_openpgp_privkey_t privkey = NULL;
617
ret = gnutls_openpgp_privkey_init(&privkey);
618
if(ret != GNUTLS_E_SUCCESS){
619
fprintf_plus(stderr, "Error initializing OpenPGP key"
620
" structure: %s", safer_gnutls_strerror(ret));
621
free(buffer.data);
622
buffer.data = NULL;
623
} else {
624
ret = gnutls_openpgp_privkey_import(privkey, &buffer,
625
GNUTLS_OPENPGP_FMT_BASE64,
626
"", 0);
627
if(ret != GNUTLS_E_SUCCESS){
628
fprintf_plus(stderr, "Error importing OpenPGP key : %s",
629
safer_gnutls_strerror(ret));
630
privkey = NULL;
631
}
632
free(buffer.data);
633
buffer.data = NULL;
634
if(privkey != NULL){
635
/* Use private key to suggest an appropriate sec_param */
636
sec_param = gnutls_openpgp_privkey_sec_param(privkey);
637
gnutls_openpgp_privkey_deinit(privkey);
638
if(debug){
639
fprintf_plus(stderr, "This OpenPGP key implies using a"
640
" GnuTLS security parameter \"%s\".\n",
641
safe_string(gnutls_sec_param_get_name
642
(sec_param)));
643
}
644
}
645
}
646
}
647
if(sec_param == GNUTLS_SEC_PARAM_UNKNOWN){
648
/* Err on the side of caution */
649
sec_param = GNUTLS_SEC_PARAM_ULTRA;
650
if(debug){
651
fprintf_plus(stderr, "Falling back to security parameter"
652
" \"%s\"\n",
653
safe_string(gnutls_sec_param_get_name
654
(sec_param)));
655
}
656
}
657
}
658
uret = gnutls_sec_param_to_pk_bits(GNUTLS_PK_DH, sec_param);
659
if(uret != 0){
660
mc->dh_bits = uret;
661
if(debug){
662
fprintf_plus(stderr, "A \"%s\" GnuTLS security parameter"
663
" implies %u DH bits; using that.\n",
664
safe_string(gnutls_sec_param_get_name
665
(sec_param)),
666
mc->dh_bits);
667
}
668
} else {
669
fprintf_plus(stderr, "Failed to get implied number of DH"
670
" bits for security parameter \"%s\"): %s\n",
671
safe_string(gnutls_sec_param_get_name(sec_param)),
672
safer_gnutls_strerror(ret));
673
goto globalfail;
674
}
675
} else if(debug){
676
fprintf_plus(stderr, "DH bits explicitly set to %u\n",
677
mc->dh_bits);
678
}
679
ret = gnutls_dh_params_generate2(mc->dh_params, mc->dh_bits);
545
680
if(ret != GNUTLS_E_SUCCESS){
546
fprintf_plus(stderr, "Error in GnuTLS prime generation: %s\n",
547
safer_gnutls_strerror(ret));
681
fprintf_plus(stderr, "Error in GnuTLS prime generation (%u bits):"
682
" %s\n", mc->dh_bits, safer_gnutls_strerror(ret));
548
683
goto globalfail;
549
684
}
550
685
551
gnutls_certificate_set_dh_params(mc.cred, mc.dh_params);
686
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
552
687
553
688
return 0;
554
689
555
690
globalfail:
556
691
557
gnutls_certificate_free_credentials(mc.cred);
692
gnutls_certificate_free_credentials(mc->cred);
558
693
gnutls_global_deinit();
559
gnutls_dh_params_deinit(mc.dh_params);
694
gnutls_dh_params_deinit(mc->dh_params);
560
695
return -1;
561
696
}
562
697
563
static int init_gnutls_session(gnutls_session_t *session){
698
__attribute__((nonnull, warn_unused_result))
699
static int init_gnutls_session(gnutls_session_t *session,
700
mandos_context *mc){
564
701
int ret;
565
702
/* GnuTLS session creation */
566
703
do {
578
715
{
579
716
const char *err;
580
717
do {
581
ret = gnutls_priority_set_direct(*session, mc.priority, &err);
718
ret = gnutls_priority_set_direct(*session, mc->priority, &err);
582
719
if(quit_now){
583
720
gnutls_deinit(*session);
584
721
return -1;
595
732
596
733
do {
597
734
ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,
598
mc.cred);
735
mc->cred);
599
736
if(quit_now){
600
737
gnutls_deinit(*session);
601
738
return -1;
611
748
/* ignore client certificate if any. */
612
749
gnutls_certificate_server_set_request(*session, GNUTLS_CERT_IGNORE);
613
750
614
gnutls_dh_set_prime_bits(*session, mc.dh_bits);
751
gnutls_dh_set_prime_bits(*session, mc->dh_bits);
615
752
616
753
return 0;
617
754
}
621
758
__attribute__((unused)) const char *txt){}
622
759
623
760
/* Called when a Mandos server is found */
761
__attribute__((nonnull, warn_unused_result))
624
762
static int start_mandos_communication(const char *ip, in_port_t port,
625
763
AvahiIfIndex if_index,
626
int af){
764
int af, mandos_context *mc){
627
765
int ret, tcp_sd = -1;
628
766
ssize_t sret;
629
union {
630
struct sockaddr_in in;
631
struct sockaddr_in6 in6;
632
} to;
767
struct sockaddr_storage to;
633
768
char *buffer = NULL;
634
769
char *decrypted_buffer = NULL;
635
770
size_t buffer_length = 0;
659
794
return -1;
660
795
}
661
796
662
ret = init_gnutls_session(&session);
797
/* If the interface is specified and we have a list of interfaces */
798
if(if_index != AVAHI_IF_UNSPEC and mc->interfaces != NULL){
799
/* Check if the interface is one of the interfaces we are using */
800
bool match = false;
801
{
802
char *interface = NULL;
803
while((interface=argz_next(mc->interfaces, mc->interfaces_size,
804
interface))){
805
if(if_nametoindex(interface) == (unsigned int)if_index){
806
match = true;
807
break;
808
}
809
}
810
}
811
if(not match){
812
/* This interface does not match any in the list, so we don't
813
connect to the server */
814
if(debug){
815
char interface[IF_NAMESIZE];
816
if(if_indextoname((unsigned int)if_index, interface) == NULL){
817
perror_plus("if_indextoname");
818
} else {
819
fprintf_plus(stderr, "Skipping server on non-used interface"
820
" \"%s\"\n",
821
if_indextoname((unsigned int)if_index,
822
interface));
823
}
824
}
825
return -1;
826
}
827
}
828
829
ret = init_gnutls_session(&session, mc);
663
830
if(ret != 0){
664
831
return -1;
665
832
}
684
851
685
852
memset(&to, 0, sizeof(to));
686
853
if(af == AF_INET6){
687
to.in6.sin6_family = (sa_family_t)af;
688
ret = inet_pton(af, ip, &to.in6.sin6_addr);
854
((struct sockaddr_in6 *)&to)->sin6_family = (sa_family_t)af;
855
ret = inet_pton(af, ip, &((struct sockaddr_in6 *)&to)->sin6_addr);
689
856
} else { /* IPv4 */
690
to.in.sin_family = (sa_family_t)af;
691
ret = inet_pton(af, ip, &to.in.sin_addr);
857
((struct sockaddr_in *)&to)->sin_family = (sa_family_t)af;
858
ret = inet_pton(af, ip, &((struct sockaddr_in *)&to)->sin_addr);
692
859
}
693
860
if(ret < 0 ){
694
861
int e = errno;
703
870
goto mandos_end;
704
871
}
705
872
if(af == AF_INET6){
706
to.in6.sin6_port = htons(port);
707
if(IN6_IS_ADDR_LINKLOCAL /* Spurious warnings from */
708
(&to.in6.sin6_addr)){ /* -Wstrict-aliasing=2 or lower and
709
-Wunreachable-code*/
873
((struct sockaddr_in6 *)&to)->sin6_port = htons(port);
874
if(IN6_IS_ADDR_LINKLOCAL
875
(&((struct sockaddr_in6 *)&to)->sin6_addr)){
710
876
if(if_index == AVAHI_IF_UNSPEC){
711
877
fprintf_plus(stderr, "An IPv6 link-local address is"
712
878
" incomplete without a network interface\n");
714
880
goto mandos_end;
715
881
}
716
882
/* Set the network interface number as scope */
717
to.in6.sin6_scope_id = (uint32_t)if_index;
883
((struct sockaddr_in6 *)&to)->sin6_scope_id = (uint32_t)if_index;
718
884
}
719
885
} else {
720
to.in.sin_port = htons(port); /* Spurious warnings from
721
-Wconversion and
722
-Wunreachable-code */
886
((struct sockaddr_in *)&to)->sin_port = htons(port);
723
887
}
724
888
725
889
if(quit_now){
742
906
}
743
907
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
744
908
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
745
const char *pcret;
746
909
if(af == AF_INET6){
747
pcret = inet_ntop(af, &(to.in6.sin6_addr), addrstr,
748
sizeof(addrstr));
910
ret = getnameinfo((struct sockaddr *)&to,
911
sizeof(struct sockaddr_in6),
912
addrstr, sizeof(addrstr), NULL, 0,
913
NI_NUMERICHOST);
749
914
} else {
750
pcret = inet_ntop(af, &(to.in.sin_addr), addrstr,
751
sizeof(addrstr));
915
ret = getnameinfo((struct sockaddr *)&to,
916
sizeof(struct sockaddr_in),
917
addrstr, sizeof(addrstr), NULL, 0,
918
NI_NUMERICHOST);
752
919
}
753
if(pcret == NULL){
754
perror_plus("inet_ntop");
755
} else {
756
if(strcmp(addrstr, ip) != 0){
757
fprintf_plus(stderr, "Canonical address form: %s\n", addrstr);
758
}
920
if(ret == EAI_SYSTEM){
921
perror_plus("getnameinfo");
922
} else if(ret != 0) {
923
fprintf_plus(stderr, "getnameinfo: %s", gai_strerror(ret));
924
} else if(strcmp(addrstr, ip) != 0){
925
fprintf_plus(stderr, "Canonical address form: %s\n", addrstr);
759
926
}
760
927
}
761
928
765
932
}
766
933
767
934
if(af == AF_INET6){
768
ret = connect(tcp_sd, &to.in6, sizeof(to));
935
ret = connect(tcp_sd, (struct sockaddr *)&to,
936
sizeof(struct sockaddr_in6));
769
937
} else {
770
ret = connect(tcp_sd, &to.in, sizeof(to)); /* IPv4 */
938
ret = connect(tcp_sd, (struct sockaddr *)&to, /* IPv4 */
939
sizeof(struct sockaddr_in));
771
940
}
772
941
if(ret < 0){
773
if ((errno != ECONNREFUSED and errno != ENETUNREACH) or debug){
942
if((errno != ECONNREFUSED and errno != ENETUNREACH) or debug){
774
943
int e = errno;
775
944
perror_plus("connect");
776
945
errno = e;
937
1106
if(buffer_length > 0){
938
1107
ssize_t decrypted_buffer_size;
939
1108
decrypted_buffer_size = pgp_packet_decrypt(buffer, buffer_length,
940
&decrypted_buffer);
1109
&decrypted_buffer, mc);
941
1110
if(decrypted_buffer_size >= 0){
942
1111
943
1112
written = 0;
991
1160
return retval;
992
1161
}
993
1162
1163
__attribute__((nonnull))
994
1164
static void resolve_callback(AvahiSServiceResolver *r,
995
1165
AvahiIfIndex interface,
996
1166
AvahiProtocol proto,
1004
1174
AVAHI_GCC_UNUSED AvahiStringList *txt,
1005
1175
AVAHI_GCC_UNUSED AvahiLookupResultFlags
1006
1176
flags,
1007
AVAHI_GCC_UNUSED void* userdata){
1177
void *mc){
1008
1178
if(r == NULL){
1009
1179
return;
1010
1180
}
1013
1183
timed out */
1014
1184
1015
1185
if(quit_now){
1186
avahi_s_service_resolver_free(r);
1016
1187
return;
1017
1188
}
1018
1189
1022
1193
fprintf_plus(stderr, "(Avahi Resolver) Failed to resolve service "
1023
1194
"'%s' of type '%s' in domain '%s': %s\n", name, type,
1024
1195
domain,
1025
avahi_strerror(avahi_server_errno(mc.server)));
1196
avahi_strerror(avahi_server_errno
1197
(((mandos_context*)mc)->server)));
1026
1198
break;
1027
1199
1028
1200
case AVAHI_RESOLVER_FOUND:
1036
1208
}
1037
1209
int ret = start_mandos_communication(ip, (in_port_t)port,
1038
1210
interface,
1039
avahi_proto_to_af(proto));
1211
avahi_proto_to_af(proto),
1212
mc);
1040
1213
if(ret == 0){
1041
avahi_simple_poll_quit(mc.simple_poll);
1214
avahi_simple_poll_quit(simple_poll);
1042
1215
} else {
1043
1216
if(not add_server(ip, (in_port_t)port, interface,
1044
avahi_proto_to_af(proto))){
1217
avahi_proto_to_af(proto),
1218
&((mandos_context*)mc)->current_server)){
1045
1219
fprintf_plus(stderr, "Failed to add server \"%s\" to server"
1046
1220
" list\n", name);
1047
1221
}
1060
1234
const char *domain,
1061
1235
AVAHI_GCC_UNUSED AvahiLookupResultFlags
1062
1236
flags,
1063
AVAHI_GCC_UNUSED void* userdata){
1237
void *mc){
1064
1238
if(b == NULL){
1065
1239
return;
1066
1240
}
1077
1251
case AVAHI_BROWSER_FAILURE:
1078
1252
1079
1253
fprintf_plus(stderr, "(Avahi browser) %s\n",
1080
avahi_strerror(avahi_server_errno(mc.server)));
1081
avahi_simple_poll_quit(mc.simple_poll);
1254
avahi_strerror(avahi_server_errno
1255
(((mandos_context*)mc)->server)));
1256
avahi_simple_poll_quit(simple_poll);
1082
1257
return;
1083
1258
1084
1259
case AVAHI_BROWSER_NEW:
1087
1262
the callback function is called the Avahi server will free the
1088
1263
resolver for us. */
1089
1264
1090
if(avahi_s_service_resolver_new(mc.server, interface, protocol,
1091
name, type, domain, protocol, 0,
1092
resolve_callback, NULL) == NULL)
1265
if(avahi_s_service_resolver_new(((mandos_context*)mc)->server,
1266
interface, protocol, name, type,
1267
domain, protocol, 0,
1268
resolve_callback, mc) == NULL)
1093
1269
fprintf_plus(stderr, "Avahi: Failed to resolve service '%s':"
1094
1270
" %s\n", name,
1095
avahi_strerror(avahi_server_errno(mc.server)));
1271
avahi_strerror(avahi_server_errno
1272
(((mandos_context*)mc)->server)));
1096
1273
break;
1097
1274
1098
1275
case AVAHI_BROWSER_REMOVE:
1117
1294
signal_received = sig;
1118
1295
int old_errno = errno;
1119
1296
/* set main loop to exit */
1120
if(mc.simple_poll != NULL){
1121
avahi_simple_poll_quit(mc.simple_poll);
1297
if(simple_poll != NULL){
1298
avahi_simple_poll_quit(simple_poll);
1122
1299
}
1123
1300
errno = old_errno;
1124
1301
}
1125
1302
1303
__attribute__((nonnull, warn_unused_result))
1126
1304
bool get_flags(const char *ifname, struct ifreq *ifr){
1127
1305
int ret;
1128
1306
error_t ret_errno;
1147
1325
return true;
1148
1326
}
1149
1327
1328
__attribute__((nonnull, warn_unused_result))
1150
1329
bool good_flags(const char *ifname, const struct ifreq *ifr){
1151
1330
1152
1331
/* Reject the loopback device */
1194
1373
* corresponds to an acceptable network device.
1195
1374
* (This function is passed to scandir(3) as a filter function.)
1196
1375
*/
1376
__attribute__((nonnull, warn_unused_result))
1197
1377
int good_interface(const struct dirent *if_entry){
1198
1378
if(if_entry->d_name[0] == '.'){
1199
1379
return 0;
1217
1397
/*
1218
1398
* This function determines if a network interface is up.
1219
1399
*/
1400
__attribute__((nonnull, warn_unused_result))
1220
1401
bool interface_is_up(const char *interface){
1221
1402
struct ifreq ifr;
1222
1403
if(not get_flags(interface, &ifr)){
1233
1414
/*
1234
1415
* This function determines if a network interface is running
1235
1416
*/
1417
__attribute__((nonnull, warn_unused_result))
1236
1418
bool interface_is_running(const char *interface){
1237
1419
struct ifreq ifr;
1238
1420
if(not get_flags(interface, &ifr)){
1246
1428
return (bool)(ifr.ifr_flags & IFF_RUNNING);
1247
1429
}
1248
1430
1431
__attribute__((nonnull, pure, warn_unused_result))
1249
1432
int notdotentries(const struct dirent *direntry){
1250
1433
/* Skip "." and ".." */
1251
1434
if(direntry->d_name[0] == '.'
1258
1441
}
1259
1442
1260
1443
/* Is this directory entry a runnable program? */
1444
__attribute__((nonnull, warn_unused_result))
1261
1445
int runnable_hook(const struct dirent *direntry){
1262
1446
int ret;
1263
1447
size_t sret;
1271
1455
sret = strspn(direntry->d_name, "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
1272
1456
"abcdefghijklmnopqrstuvwxyz"
1273
1457
"0123456789"
1274
"_-");
1458
"_.-");
1275
1459
if((direntry->d_name)[sret] != '\0'){
1276
1460
/* Contains non-allowed characters */
1277
1461
if(debug){
1281
1465
return 0;
1282
1466
}
1283
1467
1284
char *fullname = NULL;
1285
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1286
if(ret < 0){
1287
perror_plus("asprintf");
1288
return 0;
1289
}
1290
1291
ret = stat(fullname, &st);
1468
ret = fstatat(hookdir_fd, direntry->d_name, &st, 0);
1292
1469
if(ret == -1){
1293
1470
if(debug){
1294
1471
perror_plus("Could not stat hook");
1318
1495
return 1;
1319
1496
}
1320
1497
1321
int avahi_loop_with_timeout(AvahiSimplePoll *s, int retry_interval){
1498
__attribute__((nonnull, warn_unused_result))
1499
int avahi_loop_with_timeout(AvahiSimplePoll *s, int retry_interval,
1500
mandos_context *mc){
1322
1501
int ret;
1323
1502
struct timespec now;
1324
1503
struct timespec waited_time;
1325
1504
intmax_t block_time;
1326
1505
1327
1506
while(true){
1328
if(mc.current_server == NULL){
1329
if (debug){
1507
if(mc->current_server == NULL){
1508
if(debug){
1330
1509
fprintf_plus(stderr, "Wait until first server is found."
1331
1510
" No timeout!\n");
1332
1511
}
1333
1512
ret = avahi_simple_poll_iterate(s, -1);
1334
1513
} else {
1335
if (debug){
1514
if(debug){
1336
1515
fprintf_plus(stderr, "Check current_server if we should run"
1337
1516
" it, or wait\n");
1338
1517
}
1345
1524
/* Calculating in ms how long time between now and server
1346
1525
who we visted longest time ago. Now - last seen. */
1347
1526
waited_time.tv_sec = (now.tv_sec
1348
- mc.current_server->last_seen.tv_sec);
1527
- mc->current_server->last_seen.tv_sec);
1349
1528
waited_time.tv_nsec = (now.tv_nsec
1350
- mc.current_server->last_seen.tv_nsec);
1529
- mc->current_server->last_seen.tv_nsec);
1351
1530
/* total time is 10s/10,000ms.
1352
1531
Converting to s from ms by dividing by 1,000,
1353
1532
and ns to ms by dividing by 1,000,000. */
1355
1534
- ((intmax_t)waited_time.tv_sec * 1000))
1356
1535
- ((intmax_t)waited_time.tv_nsec / 1000000));
1357
1536
1358
if (debug){
1537
if(debug){
1359
1538
fprintf_plus(stderr, "Blocking for %" PRIdMAX " ms\n",
1360
1539
block_time);
1361
1540
}
1362
1541
1363
1542
if(block_time <= 0){
1364
ret = start_mandos_communication(mc.current_server->ip,
1365
mc.current_server->port,
1366
mc.current_server->if_index,
1367
mc.current_server->af);
1543
ret = start_mandos_communication(mc->current_server->ip,
1544
mc->current_server->port,
1545
mc->current_server->if_index,
1546
mc->current_server->af, mc);
1368
1547
if(ret == 0){
1369
avahi_simple_poll_quit(mc.simple_poll);
1548
avahi_simple_poll_quit(s);
1370
1549
return 0;
1371
1550
}
1372
1551
ret = clock_gettime(CLOCK_MONOTONIC,
1373
&mc.current_server->last_seen);
1552
&mc->current_server->last_seen);
1374
1553
if(ret == -1){
1375
1554
perror_plus("clock_gettime");
1376
1555
return -1;
1377
1556
}
1378
mc.current_server = mc.current_server->next;
1557
mc->current_server = mc->current_server->next;
1379
1558
block_time = 0; /* Call avahi to find new Mandos
1380
1559
servers, but don't block */
1381
1560
}
1383
1562
ret = avahi_simple_poll_iterate(s, (int)block_time);
1384
1563
}
1385
1564
if(ret != 0){
1386
if (ret > 0 or errno != EINTR){
1565
if(ret > 0 or errno != EINTR){
1387
1566
return (ret != 1) ? ret : 0;
1388
1567
}
1389
1568
}
1391
1570
}
1392
1571
1393
1572
/* Set effective uid to 0, return errno */
1573
__attribute__((warn_unused_result))
1394
1574
error_t raise_privileges(void){
1395
1575
error_t old_errno = errno;
1396
1576
error_t ret_errno = 0;
1397
1577
if(seteuid(0) == -1){
1398
1578
ret_errno = errno;
1399
perror_plus("seteuid");
1400
1579
}
1401
1580
errno = old_errno;
1402
1581
return ret_errno;
1403
1582
}
1404
1583
1405
1584
/* Set effective and real user ID to 0. Return errno. */
1585
__attribute__((warn_unused_result))
1406
1586
error_t raise_privileges_permanently(void){
1407
1587
error_t old_errno = errno;
1408
1588
error_t ret_errno = raise_privileges();
1412
1592
}
1413
1593
if(setuid(0) == -1){
1414
1594
ret_errno = errno;
1415
perror_plus("seteuid");
1416
1595
}
1417
1596
errno = old_errno;
1418
1597
return ret_errno;
1419
1598
}
1420
1599
1421
1600
/* Set effective user ID to unprivileged saved user ID */
1601
__attribute__((warn_unused_result))
1422
1602
error_t lower_privileges(void){
1423
1603
error_t old_errno = errno;
1424
1604
error_t ret_errno = 0;
1425
1605
if(seteuid(uid) == -1){
1426
1606
ret_errno = errno;
1427
perror_plus("seteuid");
1428
1607
}
1429
1608
errno = old_errno;
1430
1609
return ret_errno;
1431
1610
}
1432
1611
1433
1612
/* Lower privileges permanently */
1613
__attribute__((warn_unused_result))
1434
1614
error_t lower_privileges_permanently(void){
1435
1615
error_t old_errno = errno;
1436
1616
error_t ret_errno = 0;
1437
1617
if(setuid(uid) == -1){
1438
1618
ret_errno = errno;
1439
perror_plus("setuid");
1440
1619
}
1441
1620
errno = old_errno;
1442
1621
return ret_errno;
1443
1622
}
1444
1623
1445
bool run_network_hooks(const char *mode, const char *interface,
1624
__attribute__((nonnull))
1625
void run_network_hooks(const char *mode, const char *interface,
1446
1626
const float delay){
1447
struct dirent **direntries;
1627
struct dirent **direntries = NULL;
1628
if(hookdir_fd == -1){
1629
hookdir_fd = open(hookdir, O_RDONLY);
1630
if(hookdir_fd == -1){
1631
if(errno == ENOENT){
1632
if(debug){
1633
fprintf_plus(stderr, "Network hook directory \"%s\" not"
1634
" found\n", hookdir);
1635
}
1636
} else {
1637
perror_plus("open");
1638
}
1639
return;
1640
}
1641
}
1642
#ifdef __GLIBC__
1643
#if __GLIBC_PREREQ(2, 15)
1644
int numhooks = scandirat(hookdir_fd, ".", &direntries,
1645
runnable_hook, alphasort);
1646
#else /* not __GLIBC_PREREQ(2, 15) */
1647
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1648
alphasort);
1649
#endif /* not __GLIBC_PREREQ(2, 15) */
1650
#else /* not __GLIBC__ */
1651
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1652
alphasort);
1653
#endif /* not __GLIBC__ */
1654
if(numhooks == -1){
1655
perror_plus("scandir");
1656
return;
1657
}
1448
1658
struct dirent *direntry;
1449
1659
int ret;
1450
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1451
alphasort);
1452
if(numhooks == -1){
1453
if(errno == ENOENT){
1454
if(debug){
1455
fprintf_plus(stderr, "Network hook directory \"%s\" not"
1456
" found\n", hookdir);
1457
}
1458
} else {
1459
perror_plus("scandir");
1660
int devnull = open("/dev/null", O_RDONLY);
1661
for(int i = 0; i < numhooks; i++){
1662
direntry = direntries[i];
1663
if(debug){
1664
fprintf_plus(stderr, "Running network hook \"%s\"\n",
1665
direntry->d_name);
1460
1666
}
1461
} else {
1462
int devnull = open("/dev/null", O_RDONLY);
1463
for(int i = 0; i < numhooks; i++){
1464
direntry = direntries[i];
1465
char *fullname = NULL;
1466
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1467
if(ret < 0){
1667
pid_t hook_pid = fork();
1668
if(hook_pid == 0){
1669
/* Child */
1670
/* Raise privileges */
1671
errno = raise_privileges_permanently();
1672
if(errno != 0){
1673
perror_plus("Failed to raise privileges");
1674
_exit(EX_NOPERM);
1675
}
1676
/* Set group */
1677
errno = 0;
1678
ret = setgid(0);
1679
if(ret == -1){
1680
perror_plus("setgid");
1681
_exit(EX_NOPERM);
1682
}
1683
/* Reset supplementary groups */
1684
errno = 0;
1685
ret = setgroups(0, NULL);
1686
if(ret == -1){
1687
perror_plus("setgroups");
1688
_exit(EX_NOPERM);
1689
}
1690
ret = dup2(devnull, STDIN_FILENO);
1691
if(ret == -1){
1692
perror_plus("dup2(devnull, STDIN_FILENO)");
1693
_exit(EX_OSERR);
1694
}
1695
ret = close(devnull);
1696
if(ret == -1){
1697
perror_plus("close");
1698
_exit(EX_OSERR);
1699
}
1700
ret = dup2(STDERR_FILENO, STDOUT_FILENO);
1701
if(ret == -1){
1702
perror_plus("dup2(STDERR_FILENO, STDOUT_FILENO)");
1703
_exit(EX_OSERR);
1704
}
1705
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1706
if(ret == -1){
1707
perror_plus("setenv");
1708
_exit(EX_OSERR);
1709
}
1710
ret = setenv("DEVICE", interface, 1);
1711
if(ret == -1){
1712
perror_plus("setenv");
1713
_exit(EX_OSERR);
1714
}
1715
ret = setenv("VERBOSITY", debug ? "1" : "0", 1);
1716
if(ret == -1){
1717
perror_plus("setenv");
1718
_exit(EX_OSERR);
1719
}
1720
ret = setenv("MODE", mode, 1);
1721
if(ret == -1){
1722
perror_plus("setenv");
1723
_exit(EX_OSERR);
1724
}
1725
char *delaystring;
1726
ret = asprintf(&delaystring, "%f", (double)delay);
1727
if(ret == -1){
1468
1728
perror_plus("asprintf");
1469
continue;
1470
}
1471
if(debug){
1472
fprintf_plus(stderr, "Running network hook \"%s\"\n",
1473
direntry->d_name);
1474
}
1475
pid_t hook_pid = fork();
1476
if(hook_pid == 0){
1477
/* Child */
1478
/* Raise privileges */
1479
raise_privileges_permanently();
1480
/* Set group */
1481
errno = 0;
1482
ret = setgid(0);
1483
if(ret == -1){
1484
perror_plus("setgid");
1485
}
1486
/* Reset supplementary groups */
1487
errno = 0;
1488
ret = setgroups(0, NULL);
1489
if(ret == -1){
1490
perror_plus("setgroups");
1491
}
1492
dup2(devnull, STDIN_FILENO);
1493
close(devnull);
1494
dup2(STDERR_FILENO, STDOUT_FILENO);
1495
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1496
if(ret == -1){
1497
perror_plus("setenv");
1498
_exit(EX_OSERR);
1499
}
1500
ret = setenv("DEVICE", interface, 1);
1501
if(ret == -1){
1502
perror_plus("setenv");
1503
_exit(EX_OSERR);
1504
}
1505
ret = setenv("VERBOSITY", debug ? "1" : "0", 1);
1506
if(ret == -1){
1507
perror_plus("setenv");
1508
_exit(EX_OSERR);
1509
}
1510
ret = setenv("MODE", mode, 1);
1511
if(ret == -1){
1512
perror_plus("setenv");
1513
_exit(EX_OSERR);
1514
}
1515
char *delaystring;
1516
ret = asprintf(&delaystring, "%f", delay);
1517
if(ret == -1){
1518
perror_plus("asprintf");
1519
_exit(EX_OSERR);
1520
}
1521
ret = setenv("DELAY", delaystring, 1);
1522
if(ret == -1){
1523
free(delaystring);
1524
perror_plus("setenv");
1525
_exit(EX_OSERR);
1526
}
1729
_exit(EX_OSERR);
1730
}
1731
ret = setenv("DELAY", delaystring, 1);
1732
if(ret == -1){
1527
1733
free(delaystring);
1528
if(connect_to != NULL){
1529
ret = setenv("CONNECT", connect_to, 1);
1530
if(ret == -1){
1531
perror_plus("setenv");
1532
_exit(EX_OSERR);
1533
}
1534
}
1535
if(execl(fullname, direntry->d_name, mode, NULL) == -1){
1536
perror_plus("execl");
1537
_exit(EXIT_FAILURE);
1538
}
1734
perror_plus("setenv");
1735
_exit(EX_OSERR);
1736
}
1737
free(delaystring);
1738
if(connect_to != NULL){
1739
ret = setenv("CONNECT", connect_to, 1);
1740
if(ret == -1){
1741
perror_plus("setenv");
1742
_exit(EX_OSERR);
1743
}
1744
}
1745
int hook_fd = openat(hookdir_fd, direntry->d_name, O_RDONLY);
1746
if(hook_fd == -1){
1747
perror_plus("openat");
1748
_exit(EXIT_FAILURE);
1749
}
1750
if((int)TEMP_FAILURE_RETRY(close(hookdir_fd)) == -1){
1751
perror_plus("close");
1752
_exit(EXIT_FAILURE);
1753
}
1754
if(fexecve(hook_fd, (char *const []){ direntry->d_name, NULL },
1755
environ) == -1){
1756
perror_plus("fexecve");
1757
_exit(EXIT_FAILURE);
1758
}
1759
} else {
1760
if(hook_pid == -1){
1761
perror_plus("fork");
1762
free(direntry);
1763
continue;
1764
}
1765
int status;
1766
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
1767
perror_plus("waitpid");
1768
free(direntry);
1769
continue;
1770
}
1771
if(WIFEXITED(status)){
1772
if(WEXITSTATUS(status) != 0){
1773
fprintf_plus(stderr, "Warning: network hook \"%s\" exited"
1774
" with status %d\n", direntry->d_name,
1775
WEXITSTATUS(status));
1776
free(direntry);
1777
continue;
1778
}
1779
} else if(WIFSIGNALED(status)){
1780
fprintf_plus(stderr, "Warning: network hook \"%s\" died by"
1781
" signal %d\n", direntry->d_name,
1782
WTERMSIG(status));
1783
free(direntry);
1784
continue;
1539
1785
} else {
1540
int status;
1541
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
1542
perror_plus("waitpid");
1543
free(fullname);
1544
continue;
1545
}
1546
if(WIFEXITED(status)){
1547
if(WEXITSTATUS(status) != 0){
1548
fprintf_plus(stderr, "Warning: network hook \"%s\" exited"
1549
" with status %d\n", direntry->d_name,
1550
WEXITSTATUS(status));
1551
free(fullname);
1552
continue;
1553
}
1554
} else if(WIFSIGNALED(status)){
1555
fprintf_plus(stderr, "Warning: network hook \"%s\" died by"
1556
" signal %d\n", direntry->d_name,
1557
WTERMSIG(status));
1558
free(fullname);
1559
continue;
1560
} else {
1561
fprintf_plus(stderr, "Warning: network hook \"%s\""
1562
" crashed\n", direntry->d_name);
1563
free(fullname);
1564
continue;
1565
}
1566
}
1567
free(fullname);
1568
if(debug){
1569
fprintf_plus(stderr, "Network hook \"%s\" ran successfully\n",
1570
direntry->d_name);
1571
}
1572
}
1573
close(devnull);
1574
}
1575
return true;
1786
fprintf_plus(stderr, "Warning: network hook \"%s\""
1787
" crashed\n", direntry->d_name);
1788
free(direntry);
1789
continue;
1790
}
1791
}
1792
if(debug){
1793
fprintf_plus(stderr, "Network hook \"%s\" ran successfully\n",
1794
direntry->d_name);
1795
}
1796
free(direntry);
1797
}
1798
free(direntries);
1799
if((int)TEMP_FAILURE_RETRY(close(hookdir_fd)) == -1){
1800
perror_plus("close");
1801
} else {
1802
hookdir_fd = -1;
1803
}
1804
close(devnull);
1576
1805
}
1577
1806
1807
__attribute__((nonnull, warn_unused_result))
1578
1808
error_t bring_up_interface(const char *const interface,
1579
1809
const float delay){
1580
int sd = -1;
1581
1810
error_t old_errno = errno;
1582
error_t ret_errno = 0;
1583
int ret, ret_setflags;
1811
int ret;
1584
1812
struct ifreq network;
1585
1813
unsigned int if_index = if_nametoindex(interface);
1586
1814
if(if_index == 0){
1595
1823
}
1596
1824
1597
1825
if(not interface_is_up(interface)){
1598
if(not get_flags(interface, &network) and debug){
1826
error_t ret_errno = 0, ioctl_errno = 0;
1827
if(not get_flags(interface, &network)){
1599
1828
ret_errno = errno;
1600
1829
fprintf_plus(stderr, "Failed to get flags for interface "
1601
1830
"\"%s\"\n", interface);
1831
errno = old_errno;
1602
1832
return ret_errno;
1603
1833
}
1604
network.ifr_flags |= IFF_UP;
1834
network.ifr_flags |= IFF_UP; /* set flag */
1605
1835
1606
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1607
if(sd < 0){
1836
int sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1837
if(sd == -1){
1608
1838
ret_errno = errno;
1609
1839
perror_plus("socket");
1610
1840
errno = old_errno;
1611
1841
return ret_errno;
1612
1842
}
1613
1843
1614
1844
if(quit_now){
1615
close(sd);
1845
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1846
if(ret == -1){
1847
perror_plus("close");
1848
}
1616
1849
errno = old_errno;
1617
1850
return EINTR;
1618
1851
}
1622
1855
interface);
1623
1856
}
1624
1857
1625
/* Raise priviliges */
1626
raise_privileges();
1858
/* Raise privileges */
1859
ret_errno = raise_privileges();
1860
if(ret_errno != 0){
1861
errno = ret_errno;
1862
perror_plus("Failed to raise privileges");
1863
}
1627
1864
1628
1865
#ifdef __linux__
1629
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1630
messages about the network interface to mess up the prompt */
1631
int ret_linux = klogctl(8, NULL, 5);
1632
bool restore_loglevel = true;
1633
if(ret_linux == -1){
1634
restore_loglevel = false;
1635
perror_plus("klogctl");
1866
int ret_linux;
1867
bool restore_loglevel = false;
1868
if(ret_errno == 0){
1869
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1870
messages about the network interface to mess up the prompt */
1871
ret_linux = klogctl(8, NULL, 5);
1872
if(ret_linux == -1){
1873
perror_plus("klogctl");
1874
} else {
1875
restore_loglevel = true;
1876
}
1636
1877
}
1637
1878
#endif /* __linux__ */
1638
ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1639
ret_errno = errno;
1879
int ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1880
ioctl_errno = errno;
1640
1881
#ifdef __linux__
1641
1882
if(restore_loglevel){
1642
1883
ret_linux = klogctl(7, NULL, 0);
1646
1887
}
1647
1888
#endif /* __linux__ */
1648
1889
1649
/* Lower privileges */
1650
lower_privileges();
1890
/* If raise_privileges() succeeded above */
1891
if(ret_errno == 0){
1892
/* Lower privileges */
1893
ret_errno = lower_privileges();
1894
if(ret_errno != 0){
1895
errno = ret_errno;
1896
perror_plus("Failed to lower privileges");
1897
}
1898
}
1651
1899
1652
1900
/* Close the socket */
1653
1901
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1656
1904
}
1657
1905
1658
1906
if(ret_setflags == -1){
1659
errno = ret_errno;
1907
errno = ioctl_errno;
1660
1908
perror_plus("ioctl SIOCSIFFLAGS +IFF_UP");
1661
1909
errno = old_errno;
1662
return ret_errno;
1910
return ioctl_errno;
1663
1911
}
1664
1912
} else if(debug){
1665
1913
fprintf_plus(stderr, "Interface \"%s\" is already up; good\n",
1683
1931
return 0;
1684
1932
}
1685
1933
1934
__attribute__((nonnull, warn_unused_result))
1686
1935
error_t take_down_interface(const char *const interface){
1687
int sd = -1;
1688
1936
error_t old_errno = errno;
1689
error_t ret_errno = 0;
1690
int ret, ret_setflags;
1691
1937
struct ifreq network;
1692
1938
unsigned int if_index = if_nametoindex(interface);
1693
1939
if(if_index == 0){
1696
1942
return ENXIO;
1697
1943
}
1698
1944
if(interface_is_up(interface)){
1945
error_t ret_errno = 0, ioctl_errno = 0;
1699
1946
if(not get_flags(interface, &network) and debug){
1700
1947
ret_errno = errno;
1701
1948
fprintf_plus(stderr, "Failed to get flags for interface "
1702
1949
"\"%s\"\n", interface);
1950
errno = old_errno;
1703
1951
return ret_errno;
1704
1952
}
1705
1953
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
1706
1954
1707
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1708
if(sd < 0){
1955
int sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1956
if(sd == -1){
1709
1957
ret_errno = errno;
1710
1958
perror_plus("socket");
1711
1959
errno = old_errno;
1717
1965
interface);
1718
1966
}
1719
1967
1720
/* Raise priviliges */
1721
raise_privileges();
1722
1723
ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1724
ret_errno = errno;
1725
1726
/* Lower privileges */
1727
lower_privileges();
1968
/* Raise privileges */
1969
ret_errno = raise_privileges();
1970
if(ret_errno != 0){
1971
errno = ret_errno;
1972
perror_plus("Failed to raise privileges");
1973
}
1974
1975
int ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1976
ioctl_errno = errno;
1977
1978
/* If raise_privileges() succeeded above */
1979
if(ret_errno == 0){
1980
/* Lower privileges */
1981
ret_errno = lower_privileges();
1982
if(ret_errno != 0){
1983
errno = ret_errno;
1984
perror_plus("Failed to lower privileges");
1985
}
1986
}
1728
1987
1729
1988
/* Close the socket */
1730
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1989
int ret = (int)TEMP_FAILURE_RETRY(close(sd));
1731
1990
if(ret == -1){
1732
1991
perror_plus("close");
1733
1992
}
1734
1993
1735
1994
if(ret_setflags == -1){
1736
errno = ret_errno;
1995
errno = ioctl_errno;
1737
1996
perror_plus("ioctl SIOCSIFFLAGS -IFF_UP");
1738
1997
errno = old_errno;
1739
return ret_errno;
1998
return ioctl_errno;
1740
1999
}
1741
2000
} else if(debug){
1742
2001
fprintf_plus(stderr, "Interface \"%s\" is already down; odd\n",
1748
2007
}
1749
2008
1750
2009
int main(int argc, char *argv[]){
2010
mandos_context mc = { .server = NULL, .dh_bits = 0,
2011
.priority = "SECURE256:!CTYPE-X.509:"
2012
"+CTYPE-OPENPGP:!RSA", .current_server = NULL,
2013
.interfaces = NULL, .interfaces_size = 0 };
1751
2014
AvahiSServiceBrowser *sb = NULL;
1752
2015
error_t ret_errno;
1753
2016
int ret;
1754
2017
intmax_t tmpmax;
1755
2018
char *tmp;
1756
2019
int exitcode = EXIT_SUCCESS;
1757
char *interfaces = NULL;
1758
size_t interfaces_size = 0;
1759
2020
char *interfaces_to_take_down = NULL;
1760
2021
size_t interfaces_to_take_down_size = 0;
1761
char tempdir[] = "/tmp/mandosXXXXXX";
1762
bool tempdir_created = false;
2022
char run_tempdir[] = "/run/tmp/mandosXXXXXX";
2023
char old_tempdir[] = "/tmp/mandosXXXXXX";
2024
char *tempdir = NULL;
1763
2025
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
1764
2026
const char *seckey = PATHDIR "/" SECKEY;
1765
2027
const char *pubkey = PATHDIR "/" PUBKEY;
1766
2028
char *interfaces_hooks = NULL;
1767
size_t interfaces_hooks_size = 0;
1768
2029
1769
2030
bool gnutls_initialized = false;
1770
2031
bool gpgme_initialized = false;
1861
2122
connect_to = arg;
1862
2123
break;
1863
2124
case 'i': /* --interface */
1864
ret_errno = argz_add_sep(&interfaces, &interfaces_size, arg,
1865
(int)',');
2125
ret_errno = argz_add_sep(&mc.interfaces, &mc.interfaces_size,
2126
arg, (int)',');
1866
2127
if(ret_errno != 0){
1867
2128
argp_error(state, "%s", strerror(ret_errno));
1868
2129
}
1948
2209
/* Work around Debian bug #633582:
1949
2210
<http://bugs.debian.org/633582> */
1950
2211
1951
/* Re-raise priviliges */
1952
if(raise_privileges() == 0){
2212
/* Re-raise privileges */
2213
ret_errno = raise_privileges();
2214
if(ret_errno != 0){
2215
errno = ret_errno;
2216
perror_plus("Failed to raise privileges");
2217
} else {
1953
2218
struct stat st;
1954
2219
1955
2220
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
1995
2260
}
1996
2261
1997
2262
/* Lower privileges */
1998
errno = 0;
1999
ret = seteuid(uid);
2000
if(ret == -1){
2001
perror_plus("seteuid");
2263
ret_errno = lower_privileges();
2264
if(ret_errno != 0){
2265
errno = ret_errno;
2266
perror_plus("Failed to lower privileges");
2002
2267
}
2003
2268
}
2004
2269
}
2005
2270
2006
/* Remove empty interface names */
2271
/* Remove invalid interface names (except "none") */
2007
2272
{
2008
2273
char *interface = NULL;
2009
while((interface = argz_next(interfaces, interfaces_size,
2274
while((interface = argz_next(mc.interfaces, mc.interfaces_size,
2010
2275
interface))){
2011
if(if_nametoindex(interface) == 0){
2012
if(interface[0] != '\0' and strcmp(interface, "none") != 0){
2276
if(strcmp(interface, "none") != 0
2277
and if_nametoindex(interface) == 0){
2278
if(interface[0] != '\0'){
2013
2279
fprintf_plus(stderr, "Not using nonexisting interface"
2014
2280
" \"%s\"\n", interface);
2015
2281
}
2016
argz_delete(&interfaces, &interfaces_size, interface);
2282
argz_delete(&mc.interfaces, &mc.interfaces_size, interface);
2017
2283
interface = NULL;
2018
2284
}
2019
2285
}
2021
2287
2022
2288
/* Run network hooks */
2023
2289
{
2024
2025
if(interfaces != NULL){
2026
interfaces_hooks = malloc(interfaces_size);
2290
if(mc.interfaces != NULL){
2291
interfaces_hooks = malloc(mc.interfaces_size);
2027
2292
if(interfaces_hooks == NULL){
2028
2293
perror_plus("malloc");
2029
2294
goto end;
2030
2295
}
2031
memcpy(interfaces_hooks, interfaces, interfaces_size);
2032
interfaces_hooks_size = interfaces_size;
2033
argz_stringify(interfaces_hooks, interfaces_hooks_size,
2034
(int)',');
2035
}
2036
if(not run_network_hooks("start", interfaces_hooks != NULL ?
2037
interfaces_hooks : "", delay)){
2038
goto end;
2039
}
2296
memcpy(interfaces_hooks, mc.interfaces, mc.interfaces_size);
2297
argz_stringify(interfaces_hooks, mc.interfaces_size, (int)',');
2298
}
2299
run_network_hooks("start", interfaces_hooks != NULL ?
2300
interfaces_hooks : "", delay);
2040
2301
}
2041
2302
2042
2303
if(not debug){
2047
2308
from the signal handler */
2048
2309
/* Initialize the pseudo-RNG for Avahi */
2049
2310
srand((unsigned int) time(NULL));
2050
mc.simple_poll = avahi_simple_poll_new();
2051
if(mc.simple_poll == NULL){
2311
simple_poll = avahi_simple_poll_new();
2312
if(simple_poll == NULL){
2052
2313
fprintf_plus(stderr,
2053
2314
"Avahi: Failed to create simple poll object.\n");
2054
2315
exitcode = EX_UNAVAILABLE;
2119
2380
}
2120
2381
2121
2382
/* If no interfaces were specified, make a list */
2122
if(interfaces == NULL){
2123
struct dirent **direntries;
2383
if(mc.interfaces == NULL){
2384
struct dirent **direntries = NULL;
2124
2385
/* Look for any good interfaces */
2125
2386
ret = scandir(sys_class_net, &direntries, good_interface,
2126
2387
alphasort);
2127
2388
if(ret >= 1){
2128
2389
/* Add all found interfaces to interfaces list */
2129
2390
for(int i = 0; i < ret; ++i){
2130
ret_errno = argz_add(&interfaces, &interfaces_size,
2391
ret_errno = argz_add(&mc.interfaces, &mc.interfaces_size,
2131
2392
direntries[i]->d_name);
2132
2393
if(ret_errno != 0){
2394
errno = ret_errno;
2133
2395
perror_plus("argz_add");
2396
free(direntries[i]);
2134
2397
continue;
2135
2398
}
2136
2399
if(debug){
2137
2400
fprintf_plus(stderr, "Will use interface \"%s\"\n",
2138
2401
direntries[i]->d_name);
2139
2402
}
2403
free(direntries[i]);
2140
2404
}
2141
2405
free(direntries);
2142
2406
} else {
2143
free(direntries);
2407
if(ret == 0){
2408
free(direntries);
2409
}
2144
2410
fprintf_plus(stderr, "Could not find a network interface\n");
2145
2411
exitcode = EXIT_FAILURE;
2146
2412
goto end;
2147
2413
}
2148
2414
}
2149
2415
2150
/* If we only got one interface, explicitly use only that one */
2151
if(argz_count(interfaces, interfaces_size) == 1){
2152
if(debug){
2153
fprintf_plus(stderr, "Using only interface \"%s\"\n",
2154
interfaces);
2155
}
2156
if_index = (AvahiIfIndex)if_nametoindex(interfaces);
2157
}
2158
2159
/* Bring up interfaces which are down */
2160
if(not (argz_count(interfaces, interfaces_size) == 1
2161
and strcmp(interfaces, "none") == 0)){
2416
/* Bring up interfaces which are down, and remove any "none"s */
2417
{
2162
2418
char *interface = NULL;
2163
while((interface = argz_next(interfaces, interfaces_size,
2419
while((interface = argz_next(mc.interfaces, mc.interfaces_size,
2164
2420
interface))){
2421
/* If interface name is "none", stop bringing up interfaces.
2422
Also remove all instances of "none" from the list */
2423
if(strcmp(interface, "none") == 0){
2424
argz_delete(&mc.interfaces, &mc.interfaces_size,
2425
interface);
2426
interface = NULL;
2427
while((interface = argz_next(mc.interfaces,
2428
mc.interfaces_size, interface))){
2429
if(strcmp(interface, "none") == 0){
2430
argz_delete(&mc.interfaces, &mc.interfaces_size,
2431
interface);
2432
interface = NULL;
2433
}
2434
}
2435
break;
2436
}
2165
2437
bool interface_was_up = interface_is_up(interface);
2166
ret = bring_up_interface(interface, delay);
2438
errno = bring_up_interface(interface, delay);
2167
2439
if(not interface_was_up){
2168
if(ret != 0){
2169
errno = ret;
2440
if(errno != 0){
2170
2441
perror_plus("Failed to bring up interface");
2171
2442
} else {
2172
ret_errno = argz_add(&interfaces_to_take_down,
2173
&interfaces_to_take_down_size,
2174
interface);
2443
errno = argz_add(&interfaces_to_take_down,
2444
&interfaces_to_take_down_size,
2445
interface);
2446
if(errno != 0){
2447
perror_plus("argz_add");
2448
}
2175
2449
}
2176
2450
}
2177
2451
}
2178
free(interfaces);
2179
interfaces = NULL;
2180
interfaces_size = 0;
2181
2452
if(debug and (interfaces_to_take_down == NULL)){
2182
2453
fprintf_plus(stderr, "No interfaces were brought up\n");
2183
2454
}
2184
2455
}
2185
2456
2457
/* If we only got one interface, explicitly use only that one */
2458
if(argz_count(mc.interfaces, mc.interfaces_size) == 1){
2459
if(debug){
2460
fprintf_plus(stderr, "Using only interface \"%s\"\n",
2461
mc.interfaces);
2462
}
2463
if_index = (AvahiIfIndex)if_nametoindex(mc.interfaces);
2464
}
2465
2186
2466
if(quit_now){
2187
2467
goto end;
2188
2468
}
2189
2469
2190
ret = init_gnutls_global(pubkey, seckey);
2470
ret = init_gnutls_global(pubkey, seckey, &mc);
2191
2471
if(ret == -1){
2192
2472
fprintf_plus(stderr, "init_gnutls_global failed\n");
2193
2473
exitcode = EX_UNAVAILABLE;
2200
2480
goto end;
2201
2481
}
2202
2482
2203
if(mkdtemp(tempdir) == NULL){
2483
/* Try /run/tmp before /tmp */
2484
tempdir = mkdtemp(run_tempdir);
2485
if(tempdir == NULL and errno == ENOENT){
2486
if(debug){
2487
fprintf_plus(stderr, "Tempdir %s did not work, trying %s\n",
2488
run_tempdir, old_tempdir);
2489
}
2490
tempdir = mkdtemp(old_tempdir);
2491
}
2492
if(tempdir == NULL){
2204
2493
perror_plus("mkdtemp");
2205
2494
goto end;
2206
2495
}
2207
tempdir_created = true;
2208
2496
2209
2497
if(quit_now){
2210
2498
goto end;
2211
2499
}
2212
2500
2213
if(not init_gpgme(pubkey, seckey, tempdir)){
2501
if(not init_gpgme(pubkey, seckey, tempdir, &mc)){
2214
2502
fprintf_plus(stderr, "init_gpgme failed\n");
2215
2503
exitcode = EX_UNAVAILABLE;
2216
2504
goto end;
2246
2534
exitcode = EX_USAGE;
2247
2535
goto end;
2248
2536
}
2249
2537
2250
2538
if(quit_now){
2251
2539
goto end;
2252
2540
}
2273
2561
}
2274
2562
2275
2563
while(not quit_now){
2276
ret = start_mandos_communication(address, port, if_index, af);
2564
ret = start_mandos_communication(address, port, if_index, af,
2565
&mc);
2277
2566
if(quit_now or ret == 0){
2278
2567
break;
2279
2568
}
2281
2570
fprintf_plus(stderr, "Retrying in %d seconds\n",
2282
2571
(int)retry_interval);
2283
2572
}
2284
sleep((int)retry_interval);
2573
sleep((unsigned int)retry_interval);
2285
2574
}
2286
2575
2287
if (not quit_now){
2576
if(not quit_now){
2288
2577
exitcode = EXIT_SUCCESS;
2289
2578
}
2290
2579
2305
2594
config.publish_domain = 0;
2306
2595
2307
2596
/* Allocate a new server */
2308
mc.server = avahi_server_new(avahi_simple_poll_get
2309
(mc.simple_poll), &config, NULL,
2310
NULL, &ret_errno);
2597
mc.server = avahi_server_new(avahi_simple_poll_get(simple_poll),
2598
&config, NULL, NULL, &ret_errno);
2311
2599
2312
2600
/* Free the Avahi configuration data */
2313
2601
avahi_server_config_free(&config);
2328
2616
/* Create the Avahi service browser */
2329
2617
sb = avahi_s_service_browser_new(mc.server, if_index,
2330
2618
AVAHI_PROTO_UNSPEC, "_mandos._tcp",
2331
NULL, 0, browse_callback, NULL);
2619
NULL, 0, browse_callback,
2620
(void *)&mc);
2332
2621
if(sb == NULL){
2333
2622
fprintf_plus(stderr, "Failed to create service browser: %s\n",
2334
2623
avahi_strerror(avahi_server_errno(mc.server)));
2345
2634
if(debug){
2346
2635
fprintf_plus(stderr, "Starting Avahi loop search\n");
2347
2636
}
2348
2349
ret = avahi_loop_with_timeout(mc.simple_poll,
2350
(int)(retry_interval * 1000));
2637
2638
ret = avahi_loop_with_timeout(simple_poll,
2639
(int)(retry_interval * 1000), &mc);
2351
2640
if(debug){
2352
2641
fprintf_plus(stderr, "avahi_loop_with_timeout exited %s\n",
2353
2642
(ret == 0) ? "successfully" : "with error");
2360
2649
}
2361
2650
2362
2651
/* Cleanup things */
2652
free(mc.interfaces);
2653
2363
2654
if(sb != NULL)
2364
2655
avahi_s_service_browser_free(sb);
2365
2656
2366
2657
if(mc.server != NULL)
2367
2658
avahi_server_free(mc.server);
2368
2659
2369
if(mc.simple_poll != NULL)
2370
avahi_simple_poll_free(mc.simple_poll);
2660
if(simple_poll != NULL)
2661
avahi_simple_poll_free(simple_poll);
2371
2662
2372
2663
if(gnutls_initialized){
2373
2664
gnutls_certificate_free_credentials(mc.cred);
2385
2676
mc.current_server->prev->next = NULL;
2386
2677
while(mc.current_server != NULL){
2387
2678
server *next = mc.current_server->next;
2679
#ifdef __GNUC__
2680
#pragma GCC diagnostic push
2681
#pragma GCC diagnostic ignored "-Wcast-qual"
2682
#endif
2683
free((char *)(mc.current_server->ip));
2684
#ifdef __GNUC__
2685
#pragma GCC diagnostic pop
2686
#endif
2388
2687
free(mc.current_server);
2389
2688
mc.current_server = next;
2390
2689
}
2391
2690
}
2392
2691
2393
/* Re-raise priviliges */
2692
/* Re-raise privileges */
2394
2693
{
2395
raise_privileges();
2396
2397
/* Run network hooks */
2398
run_network_hooks("stop", interfaces_hooks != NULL ?
2399
interfaces_hooks : "", delay);
2400
2401
/* Take down the network interfaces which were brought up */
2402
{
2403
char *interface = NULL;
2404
while((interface=argz_next(interfaces_to_take_down,
2405
interfaces_to_take_down_size,
2406
interface))){
2407
ret_errno = take_down_interface(interface);
2408
if(ret_errno != 0){
2409
errno = ret_errno;
2410
perror_plus("Failed to take down interface");
2411
}
2412
}
2413
if(debug and (interfaces_to_take_down == NULL)){
2414
fprintf_plus(stderr, "No interfaces needed to be taken"
2415
" down\n");
2416
}
2417
}
2418
2419
lower_privileges_permanently();
2694
ret_errno = raise_privileges();
2695
if(ret_errno != 0){
2696
errno = ret_errno;
2697
perror_plus("Failed to raise privileges");
2698
} else {
2699
2700
/* Run network hooks */
2701
run_network_hooks("stop", interfaces_hooks != NULL ?
2702
interfaces_hooks : "", delay);
2703
2704
/* Take down the network interfaces which were brought up */
2705
{
2706
char *interface = NULL;
2707
while((interface=argz_next(interfaces_to_take_down,
2708
interfaces_to_take_down_size,
2709
interface))){
2710
ret_errno = take_down_interface(interface);
2711
if(ret_errno != 0){
2712
errno = ret_errno;
2713
perror_plus("Failed to take down interface");
2714
}
2715
}
2716
if(debug and (interfaces_to_take_down == NULL)){
2717
fprintf_plus(stderr, "No interfaces needed to be taken"
2718
" down\n");
2719
}
2720
}
2721
}
2722
2723
ret_errno = lower_privileges_permanently();
2724
if(ret_errno != 0){
2725
errno = ret_errno;
2726
perror_plus("Failed to lower privileges permanently");
2727
}
2420
2728
}
2421
2729
2422
2730
free(interfaces_to_take_down);
2423
2731
free(interfaces_hooks);
2424
2732
2425
2733
/* Removes the GPGME temp directory and all files inside */
2426
if(tempdir_created){
2734
if(tempdir != NULL){
2427
2735
struct dirent **direntries = NULL;
2428
struct dirent *direntry = NULL;
2429
int numentries = scandir(tempdir, &direntries, notdotentries,
2430
alphasort);
2431
if (numentries > 0){
2432
for(int i = 0; i < numentries; i++){
2433
direntry = direntries[i];
2434
char *fullname = NULL;
2435
ret = asprintf(&fullname, "%s/%s", tempdir,
2436
direntry->d_name);
2437
if(ret < 0){
2438
perror_plus("asprintf");
2439
continue;
2440
}
2441
ret = remove(fullname);
2442
if(ret == -1){
2443
fprintf_plus(stderr, "remove(\"%s\"): %s\n", fullname,
2444
strerror(errno));
2445
}
2446
free(fullname);
2736
int tempdir_fd = (int)TEMP_FAILURE_RETRY(open(tempdir, O_RDONLY |
2737
O_NOFOLLOW));
2738
if(tempdir_fd == -1){
2739
perror_plus("open");
2740
} else {
2741
#ifdef __GLIBC__
2742
#if __GLIBC_PREREQ(2, 15)
2743
int numentries = scandirat(tempdir_fd, ".", &direntries,
2744
notdotentries, alphasort);
2745
#else /* not __GLIBC_PREREQ(2, 15) */
2746
int numentries = scandir(tempdir, &direntries, notdotentries,
2747
alphasort);
2748
#endif /* not __GLIBC_PREREQ(2, 15) */
2749
#else /* not __GLIBC__ */
2750
int numentries = scandir(tempdir, &direntries, notdotentries,
2751
alphasort);
2752
#endif /* not __GLIBC__ */
2753
if(numentries >= 0){
2754
for(int i = 0; i < numentries; i++){
2755
ret = unlinkat(tempdir_fd, direntries[i]->d_name, 0);
2756
if(ret == -1){
2757
fprintf_plus(stderr, "unlinkat(open(\"%s\", O_RDONLY),"
2758
" \"%s\", 0): %s\n", tempdir,
2759
direntries[i]->d_name, strerror(errno));
2760
}
2761
free(direntries[i]);
2762
}
2763
2764
/* need to clean even if 0 because man page doesn't specify */
2765
free(direntries);
2766
if(numentries == -1){
2767
perror_plus("scandir");
2768
}
2769
ret = rmdir(tempdir);
2770
if(ret == -1 and errno != ENOENT){
2771
perror_plus("rmdir");
2772
}
2447
2773
}
2448
}
2449
2450
/* need to clean even if 0 because man page doesn't specify */
2451
free(direntries);
2452
if (numentries == -1){
2453
perror_plus("scandir");
2454
}
2455
ret = rmdir(tempdir);
2456
if(ret == -1 and errno != ENOENT){
2457
perror_plus("rmdir");
2774
TEMP_FAILURE_RETRY(close(tempdir_fd));
2458
2775
}
2459
2776
}
2460
2777
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0