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- Committer: Teddy Hogeborn
- Date: 2015-07-06 20:29:34 UTC
- mfrom: (738.1.6 route-external)
- Revision ID: teddy@recompile.se-20150706202934-09j06jm2fiw1bn80
Merge change to add local route when network is "unreachable".
added
removed
plugins.d/mandos-client.c
9
9
* "browse_callback", and parts of "main".
10
10
*
11
11
* Everything else is
12
* Copyright © 2008-2016 Teddy Hogeborn
13
* Copyright © 2008-2016 Björn Påhlsson
12
* Copyright © 2008-2015 Teddy Hogeborn
13
* Copyright © 2008-2015 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> /* strcmp(), strlen(), strerror(),
50
asprintf(), strncpy() */
49
#include <string.h> /* memset(), strcmp(), strlen(),
50
strerror(), asprintf(), strcpy() */
51
51
#include <sys/ioctl.h> /* ioctl */
52
52
#include <sys/types.h> /* socket(), inet_pton(), sockaddr,
53
53
sockaddr_in6, PF_INET6,
57
57
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
58
58
inet_pton(), connect(),
59
59
getnameinfo() */
60
#include <fcntl.h> /* open(), unlinkat(), AT_REMOVEDIR */
60
#include <fcntl.h> /* open(), unlinkat() */
61
61
#include <dirent.h> /* opendir(), struct dirent, readdir()
62
62
*/
63
63
#include <inttypes.h> /* PRIu16, PRIdMAX, intmax_t,
64
64
strtoimax() */
65
#include <errno.h> /* perror(), errno, EINTR, EINVAL,
66
EAI_SYSTEM, ENETUNREACH,
67
EHOSTUNREACH, ECONNREFUSED, EPROTO,
68
EIO, ENOENT, ENXIO, ENOMEM, EISDIR,
69
ENOTEMPTY,
65
#include <errno.h> /* perror(), errno,
70
66
program_invocation_short_name */
71
67
#include <time.h> /* nanosleep(), time(), sleep() */
72
68
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
309
305
return false;
310
306
}
311
307
312
ret = close(fd);
308
ret = (int)TEMP_FAILURE_RETRY(close(fd));
313
309
if(ret == -1){
314
310
perror_plus("close");
315
311
}
517
513
fprintf_plus(stderr, "GnuTLS: %s", string);
518
514
}
519
515
520
__attribute__((nonnull(1, 2, 4), warn_unused_result))
516
__attribute__((nonnull, warn_unused_result))
521
517
static int init_gnutls_global(const char *pubkeyfilename,
522
518
const char *seckeyfilename,
523
const char *dhparamsfilename,
524
519
mandos_context *mc){
525
520
int ret;
526
521
unsigned int uret;
529
524
fprintf_plus(stderr, "Initializing GnuTLS\n");
530
525
}
531
526
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
532
534
if(debug){
533
535
/* "Use a log level over 10 to enable all debugging options."
534
536
* - GnuTLS manual
542
544
if(ret != GNUTLS_E_SUCCESS){
543
545
fprintf_plus(stderr, "GnuTLS memory error: %s\n",
544
546
safer_gnutls_strerror(ret));
547
gnutls_global_deinit();
545
548
return -1;
546
549
}
547
550
572
575
safer_gnutls_strerror(ret));
573
576
goto globalfail;
574
577
}
575
/* If a Diffie-Hellman parameters file was given, try to use it */
576
if(dhparamsfilename != NULL){
577
gnutls_datum_t params = { .data = NULL, .size = 0 };
578
do {
579
int dhpfile = open(dhparamsfilename, O_RDONLY);
580
if(dhpfile == -1){
581
perror_plus("open");
582
dhparamsfilename = NULL;
583
break;
584
}
585
size_t params_capacity = 0;
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;
586
585
while(true){
587
params_capacity = incbuffer((char **)¶ms.data,
588
(size_t)params.size,
589
(size_t)params_capacity);
590
if(params_capacity == 0){
586
buffer_capacity = incbuffer((char **)&buffer.data,
587
(size_t)buffer.size,
588
(size_t)buffer_capacity);
589
if(buffer_capacity == 0){
591
590
perror_plus("incbuffer");
592
free(params.data);
593
params.data = NULL;
594
dhparamsfilename = NULL;
591
free(buffer.data);
592
buffer.data = NULL;
595
593
break;
596
594
}
597
ssize_t bytes_read = read(dhpfile,
598
params.data + params.size,
595
ssize_t bytes_read = read(secfile, buffer.data + buffer.size,
599
596
BUFFER_SIZE);
600
597
/* EOF */
601
598
if(bytes_read == 0){
604
601
/* check bytes_read for failure */
605
602
if(bytes_read < 0){
606
603
perror_plus("read");
607
free(params.data);
608
params.data = NULL;
609
dhparamsfilename = NULL;
610
break;
611
}
612
params.size += (unsigned int)bytes_read;
613
}
614
if(params.data == NULL){
615
dhparamsfilename = NULL;
616
}
617
if(dhparamsfilename == NULL){
618
break;
619
}
620
ret = gnutls_dh_params_import_pkcs3(mc->dh_params, ¶ms,
621
GNUTLS_X509_FMT_PEM);
622
if(ret != GNUTLS_E_SUCCESS){
623
fprintf_plus(stderr, "Failed to parse DH parameters in file"
624
" \"%s\": %s\n", dhparamsfilename,
625
safer_gnutls_strerror(ret));
626
dhparamsfilename = NULL;
627
}
628
} while(false);
629
}
630
if(dhparamsfilename == NULL){
631
if(mc->dh_bits == 0){
632
/* Find out the optimal number of DH bits */
633
/* Try to read the private key file */
634
gnutls_datum_t buffer = { .data = NULL, .size = 0 };
635
do {
636
int secfile = open(seckeyfilename, O_RDONLY);
637
if(secfile == -1){
638
perror_plus("open");
639
break;
640
}
641
size_t buffer_capacity = 0;
642
while(true){
643
buffer_capacity = incbuffer((char **)&buffer.data,
644
(size_t)buffer.size,
645
(size_t)buffer_capacity);
646
if(buffer_capacity == 0){
647
perror_plus("incbuffer");
648
free(buffer.data);
649
buffer.data = NULL;
650
break;
651
}
652
ssize_t bytes_read = read(secfile,
653
buffer.data + buffer.size,
654
BUFFER_SIZE);
655
/* EOF */
656
if(bytes_read == 0){
657
break;
658
}
659
/* check bytes_read for failure */
660
if(bytes_read < 0){
661
perror_plus("read");
662
free(buffer.data);
663
buffer.data = NULL;
664
break;
665
}
666
buffer.size += (unsigned int)bytes_read;
667
}
668
close(secfile);
669
} while(false);
670
/* If successful, use buffer to parse private key */
671
gnutls_sec_param_t sec_param = GNUTLS_SEC_PARAM_ULTRA;
672
if(buffer.data != NULL){
673
{
674
gnutls_openpgp_privkey_t privkey = NULL;
675
ret = gnutls_openpgp_privkey_init(&privkey);
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);
676
627
if(ret != GNUTLS_E_SUCCESS){
677
fprintf_plus(stderr, "Error initializing OpenPGP key"
678
" structure: %s",
628
fprintf_plus(stderr, "Error importing OpenPGP key : %s",
679
629
safer_gnutls_strerror(ret));
680
free(buffer.data);
681
buffer.data = NULL;
682
} else {
683
ret = gnutls_openpgp_privkey_import
684
(privkey, &buffer, GNUTLS_OPENPGP_FMT_BASE64, "", 0);
685
if(ret != GNUTLS_E_SUCCESS){
686
fprintf_plus(stderr, "Error importing OpenPGP key : %s",
687
safer_gnutls_strerror(ret));
688
privkey = NULL;
689
}
690
free(buffer.data);
691
buffer.data = NULL;
692
if(privkey != NULL){
693
/* Use private key to suggest an appropriate
694
sec_param */
695
sec_param = gnutls_openpgp_privkey_sec_param(privkey);
696
gnutls_openpgp_privkey_deinit(privkey);
697
if(debug){
698
fprintf_plus(stderr, "This OpenPGP key implies using"
699
" a GnuTLS security parameter \"%s\".\n",
700
safe_string(gnutls_sec_param_get_name
701
(sec_param)));
702
}
703
}
630
privkey = NULL;
704
631
}
705
}
706
if(sec_param == GNUTLS_SEC_PARAM_UNKNOWN){
707
/* Err on the side of caution */
708
sec_param = GNUTLS_SEC_PARAM_ULTRA;
709
if(debug){
710
fprintf_plus(stderr, "Falling back to security parameter"
711
" \"%s\"\n",
712
safe_string(gnutls_sec_param_get_name
713
(sec_param)));
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
}
714
644
}
715
645
}
716
646
}
717
uret = gnutls_sec_param_to_pk_bits(GNUTLS_PK_DH, sec_param);
718
if(uret != 0){
719
mc->dh_bits = uret;
647
if(sec_param == GNUTLS_SEC_PARAM_UNKNOWN){
648
/* Err on the side of caution */
649
sec_param = GNUTLS_SEC_PARAM_ULTRA;
720
650
if(debug){
721
fprintf_plus(stderr, "A \"%s\" GnuTLS security parameter"
722
" implies %u DH bits; using that.\n",
651
fprintf_plus(stderr, "Falling back to security parameter"
652
" \"%s\"\n",
723
653
safe_string(gnutls_sec_param_get_name
724
(sec_param)),
725
mc->dh_bits);
654
(sec_param)));
726
655
}
727
} else {
728
fprintf_plus(stderr, "Failed to get implied number of DH"
729
" bits for security parameter \"%s\"): %s\n",
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",
730
664
safe_string(gnutls_sec_param_get_name
731
665
(sec_param)),
732
safer_gnutls_strerror(ret));
733
goto globalfail;
666
mc->dh_bits);
734
667
}
735
} else if(debug){
736
fprintf_plus(stderr, "DH bits explicitly set to %u\n",
737
mc->dh_bits);
738
}
739
ret = gnutls_dh_params_generate2(mc->dh_params, mc->dh_bits);
740
if(ret != GNUTLS_E_SUCCESS){
741
fprintf_plus(stderr, "Error in GnuTLS prime generation (%u"
742
" bits): %s\n", mc->dh_bits,
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)),
743
672
safer_gnutls_strerror(ret));
744
673
goto globalfail;
745
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
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
748
687
749
688
return 0;
751
690
globalfail:
752
691
753
692
gnutls_certificate_free_credentials(mc->cred);
693
gnutls_global_deinit();
754
694
gnutls_dh_params_deinit(mc->dh_params);
755
695
return -1;
756
696
}
808
748
/* ignore client certificate if any. */
809
749
gnutls_certificate_server_set_request(*session, GNUTLS_CERT_IGNORE);
810
750
751
gnutls_dh_set_prime_bits(*session, mc->dh_bits);
752
811
753
return 0;
812
754
}
813
755
817
759
818
760
/* Set effective uid to 0, return errno */
819
761
__attribute__((warn_unused_result))
820
int raise_privileges(void){
821
int old_errno = errno;
822
int ret = 0;
762
error_t raise_privileges(void){
763
error_t old_errno = errno;
764
error_t ret_errno = 0;
823
765
if(seteuid(0) == -1){
824
ret = errno;
766
ret_errno = errno;
825
767
}
826
768
errno = old_errno;
827
return ret;
769
return ret_errno;
828
770
}
829
771
830
772
/* Set effective and real user ID to 0. Return errno. */
831
773
__attribute__((warn_unused_result))
832
int raise_privileges_permanently(void){
833
int old_errno = errno;
834
int ret = raise_privileges();
835
if(ret != 0){
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){
836
778
errno = old_errno;
837
return ret;
779
return ret_errno;
838
780
}
839
781
if(setuid(0) == -1){
840
ret = errno;
782
ret_errno = errno;
841
783
}
842
784
errno = old_errno;
843
return ret;
785
return ret_errno;
844
786
}
845
787
846
788
/* Set effective user ID to unprivileged saved user ID */
847
789
__attribute__((warn_unused_result))
848
int lower_privileges(void){
849
int old_errno = errno;
850
int ret = 0;
790
error_t lower_privileges(void){
791
error_t old_errno = errno;
792
error_t ret_errno = 0;
851
793
if(seteuid(uid) == -1){
852
ret = errno;
794
ret_errno = errno;
853
795
}
854
796
errno = old_errno;
855
return ret;
797
return ret_errno;
856
798
}
857
799
858
800
/* Lower privileges permanently */
859
801
__attribute__((warn_unused_result))
860
int lower_privileges_permanently(void){
861
int old_errno = errno;
862
int ret = 0;
802
error_t lower_privileges_permanently(void){
803
error_t old_errno = errno;
804
error_t ret_errno = 0;
863
805
if(setuid(uid) == -1){
864
ret = errno;
806
ret_errno = errno;
865
807
}
866
808
errno = old_errno;
867
return ret;
809
return ret_errno;
868
810
}
869
811
870
812
/* Helper function to add_local_route() and delete_local_route() */
926
868
perror_plus("dup2(devnull, STDIN_FILENO)");
927
869
_exit(EX_OSERR);
928
870
}
929
ret = close(devnull);
871
ret = (int)TEMP_FAILURE_RETRY(close(devnull));
930
872
if(ret == -1){
931
873
perror_plus("close");
932
874
_exit(EX_OSERR);
949
891
helper, O_RDONLY));
950
892
if(helper_fd == -1){
951
893
perror_plus("openat");
952
close(helperdir_fd);
953
894
_exit(EX_UNAVAILABLE);
954
895
}
955
close(helperdir_fd);
896
TEMP_FAILURE_RETRY(close(helperdir_fd));
956
897
#ifdef __GNUC__
957
898
#pragma GCC diagnostic push
958
899
#pragma GCC diagnostic ignored "-Wcast-qual"
1126
1067
goto mandos_end;
1127
1068
}
1128
1069
1070
memset(&to, 0, sizeof(to));
1129
1071
if(af == AF_INET6){
1130
struct sockaddr_in6 *to6 = (struct sockaddr_in6 *)&to;
1131
*to6 = (struct sockaddr_in6){ .sin6_family = (sa_family_t)af };
1132
ret = inet_pton(af, ip, &to6->sin6_addr);
1072
((struct sockaddr_in6 *)&to)->sin6_family = (sa_family_t)af;
1073
ret = inet_pton(af, ip, &((struct sockaddr_in6 *)&to)->sin6_addr);
1133
1074
} else { /* IPv4 */
1134
struct sockaddr_in *to4 = (struct sockaddr_in *)&to;
1135
*to4 = (struct sockaddr_in){ .sin_family = (sa_family_t)af };
1136
ret = inet_pton(af, ip, &to4->sin_addr);
1075
((struct sockaddr_in *)&to)->sin_family = (sa_family_t)af;
1076
ret = inet_pton(af, ip, &((struct sockaddr_in *)&to)->sin_addr);
1137
1077
}
1138
1078
if(ret < 0 ){
1139
1079
int e = errno;
1218
1158
sizeof(struct sockaddr_in));
1219
1159
}
1220
1160
if(ret < 0){
1221
if(((errno == ENETUNREACH) or (errno == EHOSTUNREACH))
1161
if(errno == ENETUNREACH
1222
1162
and if_index != AVAHI_IF_UNSPEC
1223
1163
and connect_to == NULL
1224
1164
and not route_added and
1462
1402
free(decrypted_buffer);
1463
1403
free(buffer);
1464
1404
if(tcp_sd >= 0){
1465
ret = close(tcp_sd);
1405
ret = (int)TEMP_FAILURE_RETRY(close(tcp_sd));
1466
1406
}
1467
1407
if(ret == -1){
1468
1408
if(e == 0){
1623
1563
__attribute__((nonnull, warn_unused_result))
1624
1564
bool get_flags(const char *ifname, struct ifreq *ifr){
1625
1565
int ret;
1626
int old_errno;
1566
error_t ret_errno;
1627
1567
1628
1568
int s = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1629
1569
if(s < 0){
1630
old_errno = errno;
1570
ret_errno = errno;
1631
1571
perror_plus("socket");
1632
errno = old_errno;
1572
errno = ret_errno;
1633
1573
return false;
1634
1574
}
1635
strncpy(ifr->ifr_name, ifname, IF_NAMESIZE);
1636
ifr->ifr_name[IF_NAMESIZE-1] = '\0'; /* NUL terminate */
1575
strcpy(ifr->ifr_name, ifname);
1637
1576
ret = ioctl(s, SIOCGIFFLAGS, ifr);
1638
1577
if(ret == -1){
1639
1578
if(debug){
1640
old_errno = errno;
1579
ret_errno = errno;
1641
1580
perror_plus("ioctl SIOCGIFFLAGS");
1642
errno = old_errno;
1581
errno = ret_errno;
1643
1582
}
1644
1583
return false;
1645
1584
}
1909
1848
return;
1910
1849
}
1911
1850
}
1851
#ifdef __GLIBC__
1852
#if __GLIBC_PREREQ(2, 15)
1912
1853
int numhooks = scandirat(hookdir_fd, ".", &direntries,
1913
1854
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__ */
1914
1863
if(numhooks == -1){
1915
1864
perror_plus("scandir");
1916
1865
return;
1998
1947
perror_plus("openat");
1999
1948
_exit(EXIT_FAILURE);
2000
1949
}
2001
if(close(hookdir_fd) == -1){
1950
if((int)TEMP_FAILURE_RETRY(close(hookdir_fd)) == -1){
2002
1951
perror_plus("close");
2003
1952
_exit(EXIT_FAILURE);
2004
1953
}
2007
1956
perror_plus("dup2(devnull, STDIN_FILENO)");
2008
1957
_exit(EX_OSERR);
2009
1958
}
2010
ret = close(devnull);
1959
ret = (int)TEMP_FAILURE_RETRY(close(devnull));
2011
1960
if(ret == -1){
2012
1961
perror_plus("close");
2013
1962
_exit(EX_OSERR);
2062
2011
free(direntry);
2063
2012
}
2064
2013
free(direntries);
2065
if(close(hookdir_fd) == -1){
2014
if((int)TEMP_FAILURE_RETRY(close(hookdir_fd)) == -1){
2066
2015
perror_plus("close");
2067
2016
} else {
2068
2017
hookdir_fd = -1;
2071
2020
}
2072
2021
2073
2022
__attribute__((nonnull, warn_unused_result))
2074
int bring_up_interface(const char *const interface,
2075
const float delay){
2076
int old_errno = errno;
2023
error_t bring_up_interface(const char *const interface,
2024
const float delay){
2025
error_t old_errno = errno;
2077
2026
int ret;
2078
2027
struct ifreq network;
2079
2028
unsigned int if_index = if_nametoindex(interface);
2089
2038
}
2090
2039
2091
2040
if(not interface_is_up(interface)){
2092
int ret_errno = 0;
2093
int ioctl_errno = 0;
2041
error_t ret_errno = 0, ioctl_errno = 0;
2094
2042
if(not get_flags(interface, &network)){
2095
2043
ret_errno = errno;
2096
2044
fprintf_plus(stderr, "Failed to get flags for interface "
2109
2057
}
2110
2058
2111
2059
if(quit_now){
2112
ret = close(sd);
2060
ret = (int)TEMP_FAILURE_RETRY(close(sd));
2113
2061
if(ret == -1){
2114
2062
perror_plus("close");
2115
2063
}
2165
2113
}
2166
2114
2167
2115
/* Close the socket */
2168
ret = close(sd);
2116
ret = (int)TEMP_FAILURE_RETRY(close(sd));
2169
2117
if(ret == -1){
2170
2118
perror_plus("close");
2171
2119
}
2199
2147
}
2200
2148
2201
2149
__attribute__((nonnull, warn_unused_result))
2202
int take_down_interface(const char *const interface){
2203
int old_errno = errno;
2150
error_t take_down_interface(const char *const interface){
2151
error_t old_errno = errno;
2204
2152
struct ifreq network;
2205
2153
unsigned int if_index = if_nametoindex(interface);
2206
2154
if(if_index == 0){
2209
2157
return ENXIO;
2210
2158
}
2211
2159
if(interface_is_up(interface)){
2212
int ret_errno = 0;
2213
int ioctl_errno = 0;
2160
error_t ret_errno = 0, ioctl_errno = 0;
2214
2161
if(not get_flags(interface, &network) and debug){
2215
2162
ret_errno = errno;
2216
2163
fprintf_plus(stderr, "Failed to get flags for interface "
2254
2201
}
2255
2202
2256
2203
/* Close the socket */
2257
int ret = close(sd);
2204
int ret = (int)TEMP_FAILURE_RETRY(close(sd));
2258
2205
if(ret == -1){
2259
2206
perror_plus("close");
2260
2207
}
2276
2223
2277
2224
int main(int argc, char *argv[]){
2278
2225
mandos_context mc = { .server = NULL, .dh_bits = 0,
2279
.priority = "SECURE256:!CTYPE-X.509"
2280
":+CTYPE-OPENPGP:!RSA:+SIGN-DSA-SHA256",
2281
.current_server = NULL, .interfaces = NULL,
2282
.interfaces_size = 0 };
2226
.priority = "SECURE256:!CTYPE-X.509:"
2227
"+CTYPE-OPENPGP:!RSA", .current_server = NULL,
2228
.interfaces = NULL, .interfaces_size = 0 };
2283
2229
AvahiSServiceBrowser *sb = NULL;
2284
2230
error_t ret_errno;
2285
2231
int ret;
2294
2240
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
2295
2241
const char *seckey = PATHDIR "/" SECKEY;
2296
2242
const char *pubkey = PATHDIR "/" PUBKEY;
2297
const char *dh_params_file = NULL;
2298
2243
char *interfaces_hooks = NULL;
2299
2244
2300
2245
bool gnutls_initialized = false;
2353
2298
.doc = "Bit length of the prime number used in the"
2354
2299
" Diffie-Hellman key exchange",
2355
2300
.group = 2 },
2356
{ .name = "dh-params", .key = 134,
2357
.arg = "FILE",
2358
.doc = "PEM-encoded PKCS#3 file with pre-generated parameters"
2359
" for the Diffie-Hellman key exchange",
2360
.group = 2 },
2361
2301
{ .name = "priority", .key = 130,
2362
2302
.arg = "STRING",
2363
2303
.doc = "GnuTLS priority string for the TLS handshake",
2418
2358
}
2419
2359
mc.dh_bits = (typeof(mc.dh_bits))tmpmax;
2420
2360
break;
2421
case 134: /* --dh-params */
2422
dh_params_file = arg;
2423
break;
2424
2361
case 130: /* --priority */
2425
2362
mc.priority = arg;
2426
2363
break;
2466
2403
.args_doc = "",
2467
2404
.doc = "Mandos client -- Get and decrypt"
2468
2405
" passwords from a Mandos server" };
2469
ret_errno = argp_parse(&argp, argc, argv,
2470
ARGP_IN_ORDER | ARGP_NO_HELP, 0, NULL);
2471
switch(ret_errno){
2406
ret = argp_parse(&argp, argc, argv,
2407
ARGP_IN_ORDER | ARGP_NO_HELP, 0, NULL);
2408
switch(ret){
2472
2409
case 0:
2473
2410
break;
2474
2411
case ENOMEM:
2475
2412
default:
2476
errno = ret_errno;
2413
errno = ret;
2477
2414
perror_plus("argp_parse");
2478
2415
exitcode = EX_OSERR;
2479
2416
goto end;
2488
2425
<http://bugs.debian.org/633582> */
2489
2426
2490
2427
/* Re-raise privileges */
2491
ret = raise_privileges();
2492
if(ret != 0){
2493
errno = ret;
2428
ret_errno = raise_privileges();
2429
if(ret_errno != 0){
2430
errno = ret_errno;
2494
2431
perror_plus("Failed to raise privileges");
2495
2432
} else {
2496
2433
struct stat st;
2512
2449
}
2513
2450
}
2514
2451
}
2515
close(seckey_fd);
2452
TEMP_FAILURE_RETRY(close(seckey_fd));
2516
2453
}
2517
2454
}
2518
2455
2533
2470
}
2534
2471
}
2535
2472
}
2536
close(pubkey_fd);
2537
}
2538
}
2539
2540
if(dh_params_file != NULL
2541
and strcmp(dh_params_file, PATHDIR "/dhparams.pem" ) == 0){
2542
int dhparams_fd = open(dh_params_file, O_RDONLY);
2543
if(dhparams_fd == -1){
2544
perror_plus("open");
2545
} else {
2546
ret = (int)TEMP_FAILURE_RETRY(fstat(dhparams_fd, &st));
2547
if(ret == -1){
2548
perror_plus("fstat");
2549
} else {
2550
if(S_ISREG(st.st_mode)
2551
and st.st_uid == 0 and st.st_gid == 0){
2552
ret = fchown(dhparams_fd, uid, gid);
2553
if(ret == -1){
2554
perror_plus("fchown");
2555
}
2556
}
2557
}
2558
close(dhparams_fd);
2473
TEMP_FAILURE_RETRY(close(pubkey_fd));
2559
2474
}
2560
2475
}
2561
2476
2562
2477
/* Lower privileges */
2563
ret = lower_privileges();
2564
if(ret != 0){
2565
errno = ret;
2478
ret_errno = lower_privileges();
2479
if(ret_errno != 0){
2480
errno = ret_errno;
2566
2481
perror_plus("Failed to lower privileges");
2567
2482
}
2568
2483
}
2738
2653
errno = bring_up_interface(interface, delay);
2739
2654
if(not interface_was_up){
2740
2655
if(errno != 0){
2741
fprintf_plus(stderr, "Failed to bring up interface \"%s\":"
2742
" %s\n", interface, strerror(errno));
2656
perror_plus("Failed to bring up interface");
2743
2657
} else {
2744
2658
errno = argz_add(&interfaces_to_take_down,
2745
2659
&interfaces_to_take_down_size,
2768
2682
goto end;
2769
2683
}
2770
2684
2771
ret = init_gnutls_global(pubkey, seckey, dh_params_file, &mc);
2685
ret = init_gnutls_global(pubkey, seckey, &mc);
2772
2686
if(ret == -1){
2773
2687
fprintf_plus(stderr, "init_gnutls_global failed\n");
2774
2688
exitcode = EX_UNAVAILABLE;
2896
2810
2897
2811
/* Allocate a new server */
2898
2812
mc.server = avahi_server_new(avahi_simple_poll_get(simple_poll),
2899
&config, NULL, NULL, &ret);
2813
&config, NULL, NULL, &ret_errno);
2900
2814
2901
2815
/* Free the Avahi configuration data */
2902
2816
avahi_server_config_free(&config);
2905
2819
/* Check if creating the Avahi server object succeeded */
2906
2820
if(mc.server == NULL){
2907
2821
fprintf_plus(stderr, "Failed to create Avahi server: %s\n",
2908
avahi_strerror(ret));
2822
avahi_strerror(ret_errno));
2909
2823
exitcode = EX_UNAVAILABLE;
2910
2824
goto end;
2911
2825
}
2963
2877
2964
2878
if(gnutls_initialized){
2965
2879
gnutls_certificate_free_credentials(mc.cred);
2880
gnutls_global_deinit();
2966
2881
gnutls_dh_params_deinit(mc.dh_params);
2967
2882
}
2968
2883
2991
2906
2992
2907
/* Re-raise privileges */
2993
2908
{
2994
ret = raise_privileges();
2995
if(ret != 0){
2996
errno = ret;
2909
ret_errno = raise_privileges();
2910
if(ret_errno != 0){
2911
errno = ret_errno;
2997
2912
perror_plus("Failed to raise privileges");
2998
2913
} else {
2999
2914
3007
2922
while((interface=argz_next(interfaces_to_take_down,
3008
2923
interfaces_to_take_down_size,
3009
2924
interface))){
3010
ret = take_down_interface(interface);
3011
if(ret != 0){
3012
errno = ret;
2925
ret_errno = take_down_interface(interface);
2926
if(ret_errno != 0){
2927
errno = ret_errno;
3013
2928
perror_plus("Failed to take down interface");
3014
2929
}
3015
2930
}
3020
2935
}
3021
2936
}
3022
2937
3023
ret = lower_privileges_permanently();
3024
if(ret != 0){
3025
errno = ret;
2938
ret_errno = lower_privileges_permanently();
2939
if(ret_errno != 0){
2940
errno = ret_errno;
3026
2941
perror_plus("Failed to lower privileges permanently");
3027
2942
}
3028
2943
}
3030
2945
free(interfaces_to_take_down);
3031
2946
free(interfaces_hooks);
3032
2947
3033
void clean_dir_at(int base, const char * const dirname,
3034
uintmax_t level){
3035
struct dirent **direntries = NULL;
3036
int dret;
3037
int dir_fd = (int)TEMP_FAILURE_RETRY(openat(base, dirname,
3038
O_RDONLY
3039
| O_NOFOLLOW
3040
| O_DIRECTORY
3041
| O_PATH));
3042
if(dir_fd == -1){
3043
perror_plus("open");
3044
}
3045
int numentries = scandirat(dir_fd, ".", &direntries,
3046
notdotentries, alphasort);
3047
if(numentries >= 0){
3048
for(int i = 0; i < numentries; i++){
3049
if(debug){
3050
fprintf_plus(stderr, "Unlinking \"%s/%s\"\n",
3051
dirname, direntries[i]->d_name);
3052
}
3053
dret = unlinkat(dir_fd, direntries[i]->d_name, 0);
3054
if(dret == -1){
3055
if(errno == EISDIR){
3056
dret = unlinkat(dir_fd, direntries[i]->d_name,
3057
AT_REMOVEDIR);
3058
}
3059
if((dret == -1) and (errno == ENOTEMPTY)
3060
and (strcmp(direntries[i]->d_name, "private-keys-v1.d")
3061
== 0) and (level == 0)){
3062
/* Recurse only in this special case */
3063
clean_dir_at(dir_fd, direntries[i]->d_name, level+1);
3064
dret = 0;
3065
}
3066
if(dret == -1){
3067
fprintf_plus(stderr, "unlink(\"%s/%s\"): %s\n", dirname,
3068
direntries[i]->d_name, strerror(errno));
3069
}
3070
}
3071
free(direntries[i]);
3072
}
3073
3074
/* need to clean even if 0 because man page doesn't specify */
3075
free(direntries);
3076
if(numentries == -1){
3077
perror_plus("scandirat");
3078
}
3079
dret = unlinkat(base, dirname, AT_REMOVEDIR);
3080
if(dret == -1 and errno != ENOENT){
3081
perror_plus("rmdir");
3082
}
3083
} else {
3084
perror_plus("scandirat");
3085
}
3086
close(dir_fd);
3087
}
3088
3089
2948
/* Removes the GPGME temp directory and all files inside */
3090
2949
if(tempdir != NULL){
3091
clean_dir_at(-1, tempdir, 0);
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
}
3092
2993
}
3093
2994
3094
2995
if(quit_now){
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0