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- Committer: Teddy Hogeborn
- Date: 2016-10-01 13:56:09 UTC
- mfrom: (237.7.423 trunk)
- Revision ID: teddy@recompile.se-20161001135609-y5q39hvf2d95utwf
Merge from trunk
added
removed
plugins.d/mandos-client.c
9
9
* "browse_callback", and parts of "main".
10
10
*
11
11
* Everything else is
12
* Copyright © 2008-2015 Teddy Hogeborn
13
* Copyright © 2008-2015 Björn Påhlsson
12
* Copyright © 2008-2016 Teddy Hogeborn
13
* Copyright © 2008-2016 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
46
46
#include <stdlib.h> /* free(), EXIT_SUCCESS, srand(),
47
47
strtof(), abort() */
48
48
#include <stdbool.h> /* bool, false, true */
49
#include <string.h> /* memset(), strcmp(), strlen(),
50
strerror(), asprintf(), strcpy() */
49
#include <string.h> /* strcmp(), strlen(), strerror(),
50
asprintf(), strncpy(), strsignal()
51
*/
51
52
#include <sys/ioctl.h> /* ioctl */
52
53
#include <sys/types.h> /* socket(), inet_pton(), sockaddr,
53
54
sockaddr_in6, PF_INET6,
57
58
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
58
59
inet_pton(), connect(),
59
60
getnameinfo() */
60
#include <fcntl.h> /* open(), unlinkat() */
61
#include <fcntl.h> /* open(), unlinkat(), AT_REMOVEDIR */
61
62
#include <dirent.h> /* opendir(), struct dirent, readdir()
62
63
*/
63
64
#include <inttypes.h> /* PRIu16, PRIdMAX, intmax_t,
64
65
strtoimax() */
65
#include <errno.h> /* perror(), errno,
66
#include <errno.h> /* perror(), errno, EINTR, EINVAL,
67
EAI_SYSTEM, ENETUNREACH,
68
EHOSTUNREACH, ECONNREFUSED, EPROTO,
69
EIO, ENOENT, ENXIO, ENOMEM, EISDIR,
70
ENOTEMPTY,
66
71
program_invocation_short_name */
67
72
#include <time.h> /* nanosleep(), time(), sleep() */
68
73
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
305
310
return false;
306
311
}
307
312
308
ret = (int)TEMP_FAILURE_RETRY(close(fd));
313
ret = close(fd);
309
314
if(ret == -1){
310
315
perror_plus("close");
311
316
}
513
518
fprintf_plus(stderr, "GnuTLS: %s", string);
514
519
}
515
520
516
__attribute__((nonnull, warn_unused_result))
521
__attribute__((nonnull(1, 2, 4), warn_unused_result))
517
522
static int init_gnutls_global(const char *pubkeyfilename,
518
523
const char *seckeyfilename,
524
const char *dhparamsfilename,
519
525
mandos_context *mc){
520
526
int ret;
521
527
unsigned int uret;
524
530
fprintf_plus(stderr, "Initializing GnuTLS\n");
525
531
}
526
532
527
ret = gnutls_global_init();
528
if(ret != GNUTLS_E_SUCCESS){
529
fprintf_plus(stderr, "GnuTLS global_init: %s\n",
530
safer_gnutls_strerror(ret));
531
return -1;
532
}
533
534
533
if(debug){
535
534
/* "Use a log level over 10 to enable all debugging options."
536
535
* - GnuTLS manual
544
543
if(ret != GNUTLS_E_SUCCESS){
545
544
fprintf_plus(stderr, "GnuTLS memory error: %s\n",
546
545
safer_gnutls_strerror(ret));
547
gnutls_global_deinit();
548
546
return -1;
549
547
}
550
548
575
573
safer_gnutls_strerror(ret));
576
574
goto globalfail;
577
575
}
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;
576
/* If a Diffie-Hellman parameters file was given, try to use it */
577
if(dhparamsfilename != NULL){
578
gnutls_datum_t params = { .data = NULL, .size = 0 };
579
do {
580
int dhpfile = open(dhparamsfilename, O_RDONLY);
581
if(dhpfile == -1){
582
perror_plus("open");
583
dhparamsfilename = NULL;
584
break;
585
}
586
size_t params_capacity = 0;
585
587
while(true){
586
buffer_capacity = incbuffer((char **)&buffer.data,
587
(size_t)buffer.size,
588
(size_t)buffer_capacity);
589
if(buffer_capacity == 0){
588
params_capacity = incbuffer((char **)¶ms.data,
589
(size_t)params.size,
590
(size_t)params_capacity);
591
if(params_capacity == 0){
590
592
perror_plus("incbuffer");
591
free(buffer.data);
592
buffer.data = NULL;
593
free(params.data);
594
params.data = NULL;
595
dhparamsfilename = NULL;
593
596
break;
594
597
}
595
ssize_t bytes_read = read(secfile, buffer.data + buffer.size,
598
ssize_t bytes_read = read(dhpfile,
599
params.data + params.size,
596
600
BUFFER_SIZE);
597
601
/* EOF */
598
602
if(bytes_read == 0){
601
605
/* check bytes_read for failure */
602
606
if(bytes_read < 0){
603
607
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);
608
free(params.data);
609
params.data = NULL;
610
dhparamsfilename = NULL;
611
break;
612
}
613
params.size += (unsigned int)bytes_read;
614
}
615
if(params.data == NULL){
616
dhparamsfilename = NULL;
617
}
618
if(dhparamsfilename == NULL){
619
break;
620
}
621
ret = gnutls_dh_params_import_pkcs3(mc->dh_params, ¶ms,
622
GNUTLS_X509_FMT_PEM);
623
if(ret != GNUTLS_E_SUCCESS){
624
fprintf_plus(stderr, "Failed to parse DH parameters in file"
625
" \"%s\": %s\n", dhparamsfilename,
626
safer_gnutls_strerror(ret));
627
dhparamsfilename = NULL;
628
}
629
} while(false);
630
}
631
if(dhparamsfilename == NULL){
632
if(mc->dh_bits == 0){
633
/* Find out the optimal number of DH bits */
634
/* Try to read the private key file */
635
gnutls_datum_t buffer = { .data = NULL, .size = 0 };
636
do {
637
int secfile = open(seckeyfilename, O_RDONLY);
638
if(secfile == -1){
639
perror_plus("open");
640
break;
641
}
642
size_t buffer_capacity = 0;
643
while(true){
644
buffer_capacity = incbuffer((char **)&buffer.data,
645
(size_t)buffer.size,
646
(size_t)buffer_capacity);
647
if(buffer_capacity == 0){
648
perror_plus("incbuffer");
649
free(buffer.data);
650
buffer.data = NULL;
651
break;
652
}
653
ssize_t bytes_read = read(secfile,
654
buffer.data + buffer.size,
655
BUFFER_SIZE);
656
/* EOF */
657
if(bytes_read == 0){
658
break;
659
}
660
/* check bytes_read for failure */
661
if(bytes_read < 0){
662
perror_plus("read");
663
free(buffer.data);
664
buffer.data = NULL;
665
break;
666
}
667
buffer.size += (unsigned int)bytes_read;
668
}
669
close(secfile);
670
} while(false);
671
/* If successful, use buffer to parse private key */
672
gnutls_sec_param_t sec_param = GNUTLS_SEC_PARAM_ULTRA;
673
if(buffer.data != NULL){
674
{
675
gnutls_openpgp_privkey_t privkey = NULL;
676
ret = gnutls_openpgp_privkey_init(&privkey);
627
677
if(ret != GNUTLS_E_SUCCESS){
628
fprintf_plus(stderr, "Error importing OpenPGP key : %s",
678
fprintf_plus(stderr, "Error initializing OpenPGP key"
679
" structure: %s",
629
680
safer_gnutls_strerror(ret));
630
privkey = NULL;
681
free(buffer.data);
682
buffer.data = NULL;
683
} else {
684
ret = gnutls_openpgp_privkey_import
685
(privkey, &buffer, GNUTLS_OPENPGP_FMT_BASE64, "", 0);
686
if(ret != GNUTLS_E_SUCCESS){
687
fprintf_plus(stderr, "Error importing OpenPGP key : %s",
688
safer_gnutls_strerror(ret));
689
privkey = NULL;
690
}
691
free(buffer.data);
692
buffer.data = NULL;
693
if(privkey != NULL){
694
/* Use private key to suggest an appropriate
695
sec_param */
696
sec_param = gnutls_openpgp_privkey_sec_param(privkey);
697
gnutls_openpgp_privkey_deinit(privkey);
698
if(debug){
699
fprintf_plus(stderr, "This OpenPGP key implies using"
700
" a GnuTLS security parameter \"%s\".\n",
701
safe_string(gnutls_sec_param_get_name
702
(sec_param)));
703
}
704
}
631
705
}
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
}
706
}
707
if(sec_param == GNUTLS_SEC_PARAM_UNKNOWN){
708
/* Err on the side of caution */
709
sec_param = GNUTLS_SEC_PARAM_ULTRA;
710
if(debug){
711
fprintf_plus(stderr, "Falling back to security parameter"
712
" \"%s\"\n",
713
safe_string(gnutls_sec_param_get_name
714
(sec_param)));
644
715
}
645
716
}
646
717
}
647
if(sec_param == GNUTLS_SEC_PARAM_UNKNOWN){
648
/* Err on the side of caution */
649
sec_param = GNUTLS_SEC_PARAM_ULTRA;
718
uret = gnutls_sec_param_to_pk_bits(GNUTLS_PK_DH, sec_param);
719
if(uret != 0){
720
mc->dh_bits = uret;
650
721
if(debug){
651
fprintf_plus(stderr, "Falling back to security parameter"
652
" \"%s\"\n",
722
fprintf_plus(stderr, "A \"%s\" GnuTLS security parameter"
723
" implies %u DH bits; using that.\n",
653
724
safe_string(gnutls_sec_param_get_name
654
(sec_param)));
725
(sec_param)),
726
mc->dh_bits);
655
727
}
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",
728
} else {
729
fprintf_plus(stderr, "Failed to get implied number of DH"
730
" bits for security parameter \"%s\"): %s\n",
664
731
safe_string(gnutls_sec_param_get_name
665
732
(sec_param)),
666
mc->dh_bits);
733
safer_gnutls_strerror(ret));
734
goto globalfail;
667
735
}
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)),
736
} else if(debug){
737
fprintf_plus(stderr, "DH bits explicitly set to %u\n",
738
mc->dh_bits);
739
}
740
ret = gnutls_dh_params_generate2(mc->dh_params, mc->dh_bits);
741
if(ret != GNUTLS_E_SUCCESS){
742
fprintf_plus(stderr, "Error in GnuTLS prime generation (%u"
743
" bits): %s\n", mc->dh_bits,
672
744
safer_gnutls_strerror(ret));
673
745
goto globalfail;
674
746
}
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);
680
if(ret != GNUTLS_E_SUCCESS){
681
fprintf_plus(stderr, "Error in GnuTLS prime generation (%u bits):"
682
" %s\n", mc->dh_bits, safer_gnutls_strerror(ret));
683
goto globalfail;
684
}
685
747
}
686
748
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
687
749
688
750
return 0;
690
752
globalfail:
691
753
692
754
gnutls_certificate_free_credentials(mc->cred);
693
gnutls_global_deinit();
694
755
gnutls_dh_params_deinit(mc->dh_params);
695
756
return -1;
696
757
}
748
809
/* ignore client certificate if any. */
749
810
gnutls_certificate_server_set_request(*session, GNUTLS_CERT_IGNORE);
750
811
751
gnutls_dh_set_prime_bits(*session, mc->dh_bits);
752
753
812
return 0;
754
813
}
755
814
759
818
760
819
/* Set effective uid to 0, return errno */
761
820
__attribute__((warn_unused_result))
762
error_t raise_privileges(void){
763
error_t old_errno = errno;
764
error_t ret_errno = 0;
821
int raise_privileges(void){
822
int old_errno = errno;
823
int ret = 0;
765
824
if(seteuid(0) == -1){
766
ret_errno = errno;
825
ret = errno;
767
826
}
768
827
errno = old_errno;
769
return ret_errno;
828
return ret;
770
829
}
771
830
772
831
/* Set effective and real user ID to 0. Return errno. */
773
832
__attribute__((warn_unused_result))
774
error_t raise_privileges_permanently(void){
775
error_t old_errno = errno;
776
error_t ret_errno = raise_privileges();
777
if(ret_errno != 0){
833
int raise_privileges_permanently(void){
834
int old_errno = errno;
835
int ret = raise_privileges();
836
if(ret != 0){
778
837
errno = old_errno;
779
return ret_errno;
838
return ret;
780
839
}
781
840
if(setuid(0) == -1){
782
ret_errno = errno;
841
ret = errno;
783
842
}
784
843
errno = old_errno;
785
return ret_errno;
844
return ret;
786
845
}
787
846
788
847
/* Set effective user ID to unprivileged saved user ID */
789
848
__attribute__((warn_unused_result))
790
error_t lower_privileges(void){
791
error_t old_errno = errno;
792
error_t ret_errno = 0;
849
int lower_privileges(void){
850
int old_errno = errno;
851
int ret = 0;
793
852
if(seteuid(uid) == -1){
794
ret_errno = errno;
853
ret = errno;
795
854
}
796
855
errno = old_errno;
797
return ret_errno;
856
return ret;
798
857
}
799
858
800
859
/* Lower privileges permanently */
801
860
__attribute__((warn_unused_result))
802
error_t lower_privileges_permanently(void){
803
error_t old_errno = errno;
804
error_t ret_errno = 0;
861
int lower_privileges_permanently(void){
862
int old_errno = errno;
863
int ret = 0;
805
864
if(setuid(uid) == -1){
806
ret_errno = errno;
865
ret = errno;
807
866
}
808
867
errno = old_errno;
809
return ret_errno;
868
return ret;
810
869
}
811
870
812
871
/* Helper function to add_local_route() and delete_local_route() */
868
927
perror_plus("dup2(devnull, STDIN_FILENO)");
869
928
_exit(EX_OSERR);
870
929
}
871
ret = (int)TEMP_FAILURE_RETRY(close(devnull));
930
ret = close(devnull);
872
931
if(ret == -1){
873
932
perror_plus("close");
874
933
_exit(EX_OSERR);
891
950
helper, O_RDONLY));
892
951
if(helper_fd == -1){
893
952
perror_plus("openat");
953
close(helperdir_fd);
894
954
_exit(EX_UNAVAILABLE);
895
955
}
896
TEMP_FAILURE_RETRY(close(helperdir_fd));
956
close(helperdir_fd);
897
957
#ifdef __GNUC__
898
958
#pragma GCC diagnostic push
899
959
#pragma GCC diagnostic ignored "-Wcast-qual"
1067
1127
goto mandos_end;
1068
1128
}
1069
1129
1070
memset(&to, 0, sizeof(to));
1071
1130
if(af == AF_INET6){
1072
((struct sockaddr_in6 *)&to)->sin6_family = (sa_family_t)af;
1073
ret = inet_pton(af, ip, &((struct sockaddr_in6 *)&to)->sin6_addr);
1131
struct sockaddr_in6 *to6 = (struct sockaddr_in6 *)&to;
1132
*to6 = (struct sockaddr_in6){ .sin6_family = (sa_family_t)af };
1133
ret = inet_pton(af, ip, &to6->sin6_addr);
1074
1134
} else { /* IPv4 */
1075
((struct sockaddr_in *)&to)->sin_family = (sa_family_t)af;
1076
ret = inet_pton(af, ip, &((struct sockaddr_in *)&to)->sin_addr);
1135
struct sockaddr_in *to4 = (struct sockaddr_in *)&to;
1136
*to4 = (struct sockaddr_in){ .sin_family = (sa_family_t)af };
1137
ret = inet_pton(af, ip, &to4->sin_addr);
1077
1138
}
1078
1139
if(ret < 0 ){
1079
1140
int e = errno;
1158
1219
sizeof(struct sockaddr_in));
1159
1220
}
1160
1221
if(ret < 0){
1161
if(errno == ENETUNREACH
1222
if(((errno == ENETUNREACH) or (errno == EHOSTUNREACH))
1162
1223
and if_index != AVAHI_IF_UNSPEC
1163
1224
and connect_to == NULL
1164
1225
and not route_added and
1177
1238
with an explicit route added with the server's address.
1178
1239
1179
1240
Avahi bug reference:
1180
http://lists.freedesktop.org/archives/avahi/2010-February/001833.html
1241
https://lists.freedesktop.org/archives/avahi/2010-February/001833.html
1181
1242
https://bugs.debian.org/587961
1182
1243
*/
1183
1244
if(debug){
1363
1424
&decrypted_buffer, mc);
1364
1425
if(decrypted_buffer_size >= 0){
1365
1426
1427
clearerr(stdout);
1366
1428
written = 0;
1367
1429
while(written < (size_t) decrypted_buffer_size){
1368
1430
if(quit_now){
1384
1446
}
1385
1447
written += (size_t)ret;
1386
1448
}
1449
ret = fflush(stdout);
1450
if(ret != 0){
1451
int e = errno;
1452
if(debug){
1453
fprintf_plus(stderr, "Error writing encrypted data: %s\n",
1454
strerror(errno));
1455
}
1456
errno = e;
1457
goto mandos_end;
1458
}
1387
1459
retval = 0;
1388
1460
}
1389
1461
}
1402
1474
free(decrypted_buffer);
1403
1475
free(buffer);
1404
1476
if(tcp_sd >= 0){
1405
ret = (int)TEMP_FAILURE_RETRY(close(tcp_sd));
1477
ret = close(tcp_sd);
1406
1478
}
1407
1479
if(ret == -1){
1408
1480
if(e == 0){
1563
1635
__attribute__((nonnull, warn_unused_result))
1564
1636
bool get_flags(const char *ifname, struct ifreq *ifr){
1565
1637
int ret;
1566
error_t ret_errno;
1638
int old_errno;
1567
1639
1568
1640
int s = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1569
1641
if(s < 0){
1570
ret_errno = errno;
1642
old_errno = errno;
1571
1643
perror_plus("socket");
1572
errno = ret_errno;
1644
errno = old_errno;
1573
1645
return false;
1574
1646
}
1575
strcpy(ifr->ifr_name, ifname);
1647
strncpy(ifr->ifr_name, ifname, IF_NAMESIZE);
1648
ifr->ifr_name[IF_NAMESIZE-1] = '\0'; /* NUL terminate */
1576
1649
ret = ioctl(s, SIOCGIFFLAGS, ifr);
1577
1650
if(ret == -1){
1578
1651
if(debug){
1579
ret_errno = errno;
1652
old_errno = errno;
1580
1653
perror_plus("ioctl SIOCGIFFLAGS");
1581
errno = ret_errno;
1654
errno = old_errno;
1582
1655
}
1583
1656
return false;
1584
1657
}
1848
1921
return;
1849
1922
}
1850
1923
}
1851
#ifdef __GLIBC__
1852
#if __GLIBC_PREREQ(2, 15)
1853
1924
int numhooks = scandirat(hookdir_fd, ".", &direntries,
1854
1925
runnable_hook, alphasort);
1855
#else /* not __GLIBC_PREREQ(2, 15) */
1856
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1857
alphasort);
1858
#endif /* not __GLIBC_PREREQ(2, 15) */
1859
#else /* not __GLIBC__ */
1860
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1861
alphasort);
1862
#endif /* not __GLIBC__ */
1863
1926
if(numhooks == -1){
1864
1927
perror_plus("scandir");
1865
1928
return;
1947
2010
perror_plus("openat");
1948
2011
_exit(EXIT_FAILURE);
1949
2012
}
1950
if((int)TEMP_FAILURE_RETRY(close(hookdir_fd)) == -1){
2013
if(close(hookdir_fd) == -1){
1951
2014
perror_plus("close");
1952
2015
_exit(EXIT_FAILURE);
1953
2016
}
1956
2019
perror_plus("dup2(devnull, STDIN_FILENO)");
1957
2020
_exit(EX_OSERR);
1958
2021
}
1959
ret = (int)TEMP_FAILURE_RETRY(close(devnull));
2022
ret = close(devnull);
1960
2023
if(ret == -1){
1961
2024
perror_plus("close");
1962
2025
_exit(EX_OSERR);
2011
2074
free(direntry);
2012
2075
}
2013
2076
free(direntries);
2014
if((int)TEMP_FAILURE_RETRY(close(hookdir_fd)) == -1){
2077
if(close(hookdir_fd) == -1){
2015
2078
perror_plus("close");
2016
2079
} else {
2017
2080
hookdir_fd = -1;
2020
2083
}
2021
2084
2022
2085
__attribute__((nonnull, warn_unused_result))
2023
error_t bring_up_interface(const char *const interface,
2024
const float delay){
2025
error_t old_errno = errno;
2086
int bring_up_interface(const char *const interface,
2087
const float delay){
2088
int old_errno = errno;
2026
2089
int ret;
2027
2090
struct ifreq network;
2028
2091
unsigned int if_index = if_nametoindex(interface);
2038
2101
}
2039
2102
2040
2103
if(not interface_is_up(interface)){
2041
error_t ret_errno = 0, ioctl_errno = 0;
2104
int ret_errno = 0;
2105
int ioctl_errno = 0;
2042
2106
if(not get_flags(interface, &network)){
2043
2107
ret_errno = errno;
2044
2108
fprintf_plus(stderr, "Failed to get flags for interface "
2057
2121
}
2058
2122
2059
2123
if(quit_now){
2060
ret = (int)TEMP_FAILURE_RETRY(close(sd));
2124
ret = close(sd);
2061
2125
if(ret == -1){
2062
2126
perror_plus("close");
2063
2127
}
2113
2177
}
2114
2178
2115
2179
/* Close the socket */
2116
ret = (int)TEMP_FAILURE_RETRY(close(sd));
2180
ret = close(sd);
2117
2181
if(ret == -1){
2118
2182
perror_plus("close");
2119
2183
}
2147
2211
}
2148
2212
2149
2213
__attribute__((nonnull, warn_unused_result))
2150
error_t take_down_interface(const char *const interface){
2151
error_t old_errno = errno;
2214
int take_down_interface(const char *const interface){
2215
int old_errno = errno;
2152
2216
struct ifreq network;
2153
2217
unsigned int if_index = if_nametoindex(interface);
2154
2218
if(if_index == 0){
2157
2221
return ENXIO;
2158
2222
}
2159
2223
if(interface_is_up(interface)){
2160
error_t ret_errno = 0, ioctl_errno = 0;
2224
int ret_errno = 0;
2225
int ioctl_errno = 0;
2161
2226
if(not get_flags(interface, &network) and debug){
2162
2227
ret_errno = errno;
2163
2228
fprintf_plus(stderr, "Failed to get flags for interface "
2201
2266
}
2202
2267
2203
2268
/* Close the socket */
2204
int ret = (int)TEMP_FAILURE_RETRY(close(sd));
2269
int ret = close(sd);
2205
2270
if(ret == -1){
2206
2271
perror_plus("close");
2207
2272
}
2223
2288
2224
2289
int main(int argc, char *argv[]){
2225
2290
mandos_context mc = { .server = NULL, .dh_bits = 0,
2226
.priority = "SECURE256:!CTYPE-X.509:"
2227
"+CTYPE-OPENPGP:!RSA", .current_server = NULL,
2228
.interfaces = NULL, .interfaces_size = 0 };
2291
.priority = "SECURE256:!CTYPE-X.509"
2292
":+CTYPE-OPENPGP:!RSA:+SIGN-DSA-SHA256",
2293
.current_server = NULL, .interfaces = NULL,
2294
.interfaces_size = 0 };
2229
2295
AvahiSServiceBrowser *sb = NULL;
2230
2296
error_t ret_errno;
2231
2297
int ret;
2240
2306
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
2241
2307
const char *seckey = PATHDIR "/" SECKEY;
2242
2308
const char *pubkey = PATHDIR "/" PUBKEY;
2309
const char *dh_params_file = NULL;
2243
2310
char *interfaces_hooks = NULL;
2244
2311
2245
2312
bool gnutls_initialized = false;
2298
2365
.doc = "Bit length of the prime number used in the"
2299
2366
" Diffie-Hellman key exchange",
2300
2367
.group = 2 },
2368
{ .name = "dh-params", .key = 134,
2369
.arg = "FILE",
2370
.doc = "PEM-encoded PKCS#3 file with pre-generated parameters"
2371
" for the Diffie-Hellman key exchange",
2372
.group = 2 },
2301
2373
{ .name = "priority", .key = 130,
2302
2374
.arg = "STRING",
2303
2375
.doc = "GnuTLS priority string for the TLS handshake",
2358
2430
}
2359
2431
mc.dh_bits = (typeof(mc.dh_bits))tmpmax;
2360
2432
break;
2433
case 134: /* --dh-params */
2434
dh_params_file = arg;
2435
break;
2361
2436
case 130: /* --priority */
2362
2437
mc.priority = arg;
2363
2438
break;
2403
2478
.args_doc = "",
2404
2479
.doc = "Mandos client -- Get and decrypt"
2405
2480
" passwords from a Mandos server" };
2406
ret = argp_parse(&argp, argc, argv,
2407
ARGP_IN_ORDER | ARGP_NO_HELP, 0, NULL);
2408
switch(ret){
2481
ret_errno = argp_parse(&argp, argc, argv,
2482
ARGP_IN_ORDER | ARGP_NO_HELP, 0, NULL);
2483
switch(ret_errno){
2409
2484
case 0:
2410
2485
break;
2411
2486
case ENOMEM:
2412
2487
default:
2413
errno = ret;
2488
errno = ret_errno;
2414
2489
perror_plus("argp_parse");
2415
2490
exitcode = EX_OSERR;
2416
2491
goto end;
2422
2497
2423
2498
{
2424
2499
/* Work around Debian bug #633582:
2425
<http://bugs.debian.org/633582> */
2500
<https://bugs.debian.org/633582> */
2426
2501
2427
2502
/* Re-raise privileges */
2428
ret_errno = raise_privileges();
2429
if(ret_errno != 0){
2430
errno = ret_errno;
2503
ret = raise_privileges();
2504
if(ret != 0){
2505
errno = ret;
2431
2506
perror_plus("Failed to raise privileges");
2432
2507
} else {
2433
2508
struct stat st;
2449
2524
}
2450
2525
}
2451
2526
}
2452
TEMP_FAILURE_RETRY(close(seckey_fd));
2527
close(seckey_fd);
2453
2528
}
2454
2529
}
2455
2530
2470
2545
}
2471
2546
}
2472
2547
}
2473
TEMP_FAILURE_RETRY(close(pubkey_fd));
2548
close(pubkey_fd);
2549
}
2550
}
2551
2552
if(dh_params_file != NULL
2553
and strcmp(dh_params_file, PATHDIR "/dhparams.pem" ) == 0){
2554
int dhparams_fd = open(dh_params_file, O_RDONLY);
2555
if(dhparams_fd == -1){
2556
perror_plus("open");
2557
} else {
2558
ret = (int)TEMP_FAILURE_RETRY(fstat(dhparams_fd, &st));
2559
if(ret == -1){
2560
perror_plus("fstat");
2561
} else {
2562
if(S_ISREG(st.st_mode)
2563
and st.st_uid == 0 and st.st_gid == 0){
2564
ret = fchown(dhparams_fd, uid, gid);
2565
if(ret == -1){
2566
perror_plus("fchown");
2567
}
2568
}
2569
}
2570
close(dhparams_fd);
2474
2571
}
2475
2572
}
2476
2573
2477
2574
/* Lower privileges */
2478
ret_errno = lower_privileges();
2479
if(ret_errno != 0){
2480
errno = ret_errno;
2575
ret = lower_privileges();
2576
if(ret != 0){
2577
errno = ret;
2481
2578
perror_plus("Failed to lower privileges");
2482
2579
}
2483
2580
}
2653
2750
errno = bring_up_interface(interface, delay);
2654
2751
if(not interface_was_up){
2655
2752
if(errno != 0){
2656
perror_plus("Failed to bring up interface");
2753
fprintf_plus(stderr, "Failed to bring up interface \"%s\":"
2754
" %s\n", interface, strerror(errno));
2657
2755
} else {
2658
2756
errno = argz_add(&interfaces_to_take_down,
2659
2757
&interfaces_to_take_down_size,
2682
2780
goto end;
2683
2781
}
2684
2782
2685
ret = init_gnutls_global(pubkey, seckey, &mc);
2783
ret = init_gnutls_global(pubkey, seckey, dh_params_file, &mc);
2686
2784
if(ret == -1){
2687
2785
fprintf_plus(stderr, "init_gnutls_global failed\n");
2688
2786
exitcode = EX_UNAVAILABLE;
2810
2908
2811
2909
/* Allocate a new server */
2812
2910
mc.server = avahi_server_new(avahi_simple_poll_get(simple_poll),
2813
&config, NULL, NULL, &ret_errno);
2911
&config, NULL, NULL, &ret);
2814
2912
2815
2913
/* Free the Avahi configuration data */
2816
2914
avahi_server_config_free(&config);
2819
2917
/* Check if creating the Avahi server object succeeded */
2820
2918
if(mc.server == NULL){
2821
2919
fprintf_plus(stderr, "Failed to create Avahi server: %s\n",
2822
avahi_strerror(ret_errno));
2920
avahi_strerror(ret));
2823
2921
exitcode = EX_UNAVAILABLE;
2824
2922
goto end;
2825
2923
}
2860
2958
end:
2861
2959
2862
2960
if(debug){
2863
fprintf_plus(stderr, "%s exiting\n", argv[0]);
2961
if(signal_received){
2962
fprintf_plus(stderr, "%s exiting due to signal %d: %s\n",
2963
argv[0], signal_received,
2964
strsignal(signal_received));
2965
} else {
2966
fprintf_plus(stderr, "%s exiting\n", argv[0]);
2967
}
2864
2968
}
2865
2969
2866
2970
/* Cleanup things */
2877
2981
2878
2982
if(gnutls_initialized){
2879
2983
gnutls_certificate_free_credentials(mc.cred);
2880
gnutls_global_deinit();
2881
2984
gnutls_dh_params_deinit(mc.dh_params);
2882
2985
}
2883
2986
2906
3009
2907
3010
/* Re-raise privileges */
2908
3011
{
2909
ret_errno = raise_privileges();
2910
if(ret_errno != 0){
2911
errno = ret_errno;
3012
ret = raise_privileges();
3013
if(ret != 0){
3014
errno = ret;
2912
3015
perror_plus("Failed to raise privileges");
2913
3016
} else {
2914
3017
2922
3025
while((interface=argz_next(interfaces_to_take_down,
2923
3026
interfaces_to_take_down_size,
2924
3027
interface))){
2925
ret_errno = take_down_interface(interface);
2926
if(ret_errno != 0){
2927
errno = ret_errno;
3028
ret = take_down_interface(interface);
3029
if(ret != 0){
3030
errno = ret;
2928
3031
perror_plus("Failed to take down interface");
2929
3032
}
2930
3033
}
2935
3038
}
2936
3039
}
2937
3040
2938
ret_errno = lower_privileges_permanently();
2939
if(ret_errno != 0){
2940
errno = ret_errno;
3041
ret = lower_privileges_permanently();
3042
if(ret != 0){
3043
errno = ret;
2941
3044
perror_plus("Failed to lower privileges permanently");
2942
3045
}
2943
3046
}
2945
3048
free(interfaces_to_take_down);
2946
3049
free(interfaces_hooks);
2947
3050
3051
void clean_dir_at(int base, const char * const dirname,
3052
uintmax_t level){
3053
struct dirent **direntries = NULL;
3054
int dret;
3055
int dir_fd = (int)TEMP_FAILURE_RETRY(openat(base, dirname,
3056
O_RDONLY
3057
| O_NOFOLLOW
3058
| O_DIRECTORY
3059
| O_PATH));
3060
if(dir_fd == -1){
3061
perror_plus("open");
3062
}
3063
int numentries = scandirat(dir_fd, ".", &direntries,
3064
notdotentries, alphasort);
3065
if(numentries >= 0){
3066
for(int i = 0; i < numentries; i++){
3067
if(debug){
3068
fprintf_plus(stderr, "Unlinking \"%s/%s\"\n",
3069
dirname, direntries[i]->d_name);
3070
}
3071
dret = unlinkat(dir_fd, direntries[i]->d_name, 0);
3072
if(dret == -1){
3073
if(errno == EISDIR){
3074
dret = unlinkat(dir_fd, direntries[i]->d_name,
3075
AT_REMOVEDIR);
3076
}
3077
if((dret == -1) and (errno == ENOTEMPTY)
3078
and (strcmp(direntries[i]->d_name, "private-keys-v1.d")
3079
== 0) and (level == 0)){
3080
/* Recurse only in this special case */
3081
clean_dir_at(dir_fd, direntries[i]->d_name, level+1);
3082
dret = 0;
3083
}
3084
if(dret == -1){
3085
fprintf_plus(stderr, "unlink(\"%s/%s\"): %s\n", dirname,
3086
direntries[i]->d_name, strerror(errno));
3087
}
3088
}
3089
free(direntries[i]);
3090
}
3091
3092
/* need to clean even if 0 because man page doesn't specify */
3093
free(direntries);
3094
if(numentries == -1){
3095
perror_plus("scandirat");
3096
}
3097
dret = unlinkat(base, dirname, AT_REMOVEDIR);
3098
if(dret == -1 and errno != ENOENT){
3099
perror_plus("rmdir");
3100
}
3101
} else {
3102
perror_plus("scandirat");
3103
}
3104
close(dir_fd);
3105
}
3106
2948
3107
/* Removes the GPGME temp directory and all files inside */
2949
3108
if(tempdir != NULL){
2950
struct dirent **direntries = NULL;
2951
int tempdir_fd = (int)TEMP_FAILURE_RETRY(open(tempdir, O_RDONLY
2952
| O_NOFOLLOW
2953
| O_DIRECTORY
2954
| O_PATH));
2955
if(tempdir_fd == -1){
2956
perror_plus("open");
2957
} else {
2958
#ifdef __GLIBC__
2959
#if __GLIBC_PREREQ(2, 15)
2960
int numentries = scandirat(tempdir_fd, ".", &direntries,
2961
notdotentries, alphasort);
2962
#else /* not __GLIBC_PREREQ(2, 15) */
2963
int numentries = scandir(tempdir, &direntries, notdotentries,
2964
alphasort);
2965
#endif /* not __GLIBC_PREREQ(2, 15) */
2966
#else /* not __GLIBC__ */
2967
int numentries = scandir(tempdir, &direntries, notdotentries,
2968
alphasort);
2969
#endif /* not __GLIBC__ */
2970
if(numentries >= 0){
2971
for(int i = 0; i < numentries; i++){
2972
ret = unlinkat(tempdir_fd, direntries[i]->d_name, 0);
2973
if(ret == -1){
2974
fprintf_plus(stderr, "unlinkat(open(\"%s\", O_RDONLY),"
2975
" \"%s\", 0): %s\n", tempdir,
2976
direntries[i]->d_name, strerror(errno));
2977
}
2978
free(direntries[i]);
2979
}
2980
2981
/* need to clean even if 0 because man page doesn't specify */
2982
free(direntries);
2983
if(numentries == -1){
2984
perror_plus("scandir");
2985
}
2986
ret = rmdir(tempdir);
2987
if(ret == -1 and errno != ENOENT){
2988
perror_plus("rmdir");
2989
}
2990
}
2991
TEMP_FAILURE_RETRY(close(tempdir_fd));
2992
}
3109
clean_dir_at(-1, tempdir, 0);
2993
3110
}
2994
3111
2995
3112
if(quit_now){
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0