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- Committer: Teddy Hogeborn
- Date: 2016-03-19 22:27:06 UTC
- mfrom: (237.4.73 release)
- Revision ID: teddy@recompile.se-20160319222706-n61m90vqve42k1vc
Merge from release branch
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() */
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() */
60
#include <fcntl.h> /* open(), unlinkat(), AT_REMOVEDIR */
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,
65
#include <errno.h> /* perror(), errno, EINTR, EINVAL,
66
EAI_SYSTEM, ENETUNREACH,
67
EHOSTUNREACH, ECONNREFUSED, EPROTO,
68
EIO, ENOENT, ENXIO, ENOMEM, EISDIR,
69
ENOTEMPTY,
66
70
program_invocation_short_name */
67
71
#include <time.h> /* nanosleep(), time(), sleep() */
68
72
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
305
309
return false;
306
310
}
307
311
308
ret = (int)TEMP_FAILURE_RETRY(close(fd));
312
ret = close(fd);
309
313
if(ret == -1){
310
314
perror_plus("close");
311
315
}
513
517
fprintf_plus(stderr, "GnuTLS: %s", string);
514
518
}
515
519
516
__attribute__((nonnull, warn_unused_result))
520
__attribute__((nonnull(1, 2, 4), warn_unused_result))
517
521
static int init_gnutls_global(const char *pubkeyfilename,
518
522
const char *seckeyfilename,
523
const char *dhparamsfilename,
519
524
mandos_context *mc){
520
525
int ret;
521
526
unsigned int uret;
524
529
fprintf_plus(stderr, "Initializing GnuTLS\n");
525
530
}
526
531
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
532
if(debug){
535
533
/* "Use a log level over 10 to enable all debugging options."
536
534
* - GnuTLS manual
544
542
if(ret != GNUTLS_E_SUCCESS){
545
543
fprintf_plus(stderr, "GnuTLS memory error: %s\n",
546
544
safer_gnutls_strerror(ret));
547
gnutls_global_deinit();
548
545
return -1;
549
546
}
550
547
575
572
safer_gnutls_strerror(ret));
576
573
goto globalfail;
577
574
}
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;
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;
585
586
while(true){
586
buffer_capacity = incbuffer((char **)&buffer.data,
587
(size_t)buffer.size,
588
(size_t)buffer_capacity);
589
if(buffer_capacity == 0){
587
params_capacity = incbuffer((char **)¶ms.data,
588
(size_t)params.size,
589
(size_t)params_capacity);
590
if(params_capacity == 0){
590
591
perror_plus("incbuffer");
591
free(buffer.data);
592
buffer.data = NULL;
592
free(params.data);
593
params.data = NULL;
594
dhparamsfilename = NULL;
593
595
break;
594
596
}
595
ssize_t bytes_read = read(secfile, buffer.data + buffer.size,
597
ssize_t bytes_read = read(dhpfile,
598
params.data + params.size,
596
599
BUFFER_SIZE);
597
600
/* EOF */
598
601
if(bytes_read == 0){
601
604
/* check bytes_read for failure */
602
605
if(bytes_read < 0){
603
606
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);
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);
627
676
if(ret != GNUTLS_E_SUCCESS){
628
fprintf_plus(stderr, "Error importing OpenPGP key : %s",
677
fprintf_plus(stderr, "Error initializing OpenPGP key"
678
" structure: %s",
629
679
safer_gnutls_strerror(ret));
630
privkey = NULL;
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
}
631
704
}
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
}
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)));
644
714
}
645
715
}
646
716
}
647
if(sec_param == GNUTLS_SEC_PARAM_UNKNOWN){
648
/* Err on the side of caution */
649
sec_param = GNUTLS_SEC_PARAM_ULTRA;
717
uret = gnutls_sec_param_to_pk_bits(GNUTLS_PK_DH, sec_param);
718
if(uret != 0){
719
mc->dh_bits = uret;
650
720
if(debug){
651
fprintf_plus(stderr, "Falling back to security parameter"
652
" \"%s\"\n",
721
fprintf_plus(stderr, "A \"%s\" GnuTLS security parameter"
722
" implies %u DH bits; using that.\n",
653
723
safe_string(gnutls_sec_param_get_name
654
(sec_param)));
724
(sec_param)),
725
mc->dh_bits);
655
726
}
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",
727
} else {
728
fprintf_plus(stderr, "Failed to get implied number of DH"
729
" bits for security parameter \"%s\"): %s\n",
664
730
safe_string(gnutls_sec_param_get_name
665
731
(sec_param)),
666
mc->dh_bits);
732
safer_gnutls_strerror(ret));
733
goto globalfail;
667
734
}
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)),
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,
672
743
safer_gnutls_strerror(ret));
673
744
goto globalfail;
674
745
}
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
746
}
686
747
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
687
748
688
749
return 0;
690
751
globalfail:
691
752
692
753
gnutls_certificate_free_credentials(mc->cred);
693
gnutls_global_deinit();
694
754
gnutls_dh_params_deinit(mc->dh_params);
695
755
return -1;
696
756
}
748
808
/* ignore client certificate if any. */
749
809
gnutls_certificate_server_set_request(*session, GNUTLS_CERT_IGNORE);
750
810
751
gnutls_dh_set_prime_bits(*session, mc->dh_bits);
752
753
811
return 0;
754
812
}
755
813
759
817
760
818
/* Set effective uid to 0, return errno */
761
819
__attribute__((warn_unused_result))
762
error_t raise_privileges(void){
763
error_t old_errno = errno;
764
error_t ret_errno = 0;
820
int raise_privileges(void){
821
int old_errno = errno;
822
int ret = 0;
765
823
if(seteuid(0) == -1){
766
ret_errno = errno;
824
ret = errno;
767
825
}
768
826
errno = old_errno;
769
return ret_errno;
827
return ret;
770
828
}
771
829
772
830
/* Set effective and real user ID to 0. Return errno. */
773
831
__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){
832
int raise_privileges_permanently(void){
833
int old_errno = errno;
834
int ret = raise_privileges();
835
if(ret != 0){
778
836
errno = old_errno;
779
return ret_errno;
837
return ret;
780
838
}
781
839
if(setuid(0) == -1){
782
ret_errno = errno;
840
ret = errno;
783
841
}
784
842
errno = old_errno;
785
return ret_errno;
843
return ret;
786
844
}
787
845
788
846
/* Set effective user ID to unprivileged saved user ID */
789
847
__attribute__((warn_unused_result))
790
error_t lower_privileges(void){
791
error_t old_errno = errno;
792
error_t ret_errno = 0;
848
int lower_privileges(void){
849
int old_errno = errno;
850
int ret = 0;
793
851
if(seteuid(uid) == -1){
794
ret_errno = errno;
852
ret = errno;
795
853
}
796
854
errno = old_errno;
797
return ret_errno;
855
return ret;
798
856
}
799
857
800
858
/* Lower privileges permanently */
801
859
__attribute__((warn_unused_result))
802
error_t lower_privileges_permanently(void){
803
error_t old_errno = errno;
804
error_t ret_errno = 0;
860
int lower_privileges_permanently(void){
861
int old_errno = errno;
862
int ret = 0;
805
863
if(setuid(uid) == -1){
806
ret_errno = errno;
864
ret = errno;
807
865
}
808
866
errno = old_errno;
809
return ret_errno;
867
return ret;
810
868
}
811
869
812
870
/* Helper function to add_local_route() and delete_local_route() */
868
926
perror_plus("dup2(devnull, STDIN_FILENO)");
869
927
_exit(EX_OSERR);
870
928
}
871
ret = (int)TEMP_FAILURE_RETRY(close(devnull));
929
ret = close(devnull);
872
930
if(ret == -1){
873
931
perror_plus("close");
874
932
_exit(EX_OSERR);
891
949
helper, O_RDONLY));
892
950
if(helper_fd == -1){
893
951
perror_plus("openat");
952
close(helperdir_fd);
894
953
_exit(EX_UNAVAILABLE);
895
954
}
896
TEMP_FAILURE_RETRY(close(helperdir_fd));
955
close(helperdir_fd);
897
956
#ifdef __GNUC__
898
957
#pragma GCC diagnostic push
899
958
#pragma GCC diagnostic ignored "-Wcast-qual"
1067
1126
goto mandos_end;
1068
1127
}
1069
1128
1070
memset(&to, 0, sizeof(to));
1071
1129
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);
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);
1074
1133
} 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);
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);
1077
1137
}
1078
1138
if(ret < 0 ){
1079
1139
int e = errno;
1158
1218
sizeof(struct sockaddr_in));
1159
1219
}
1160
1220
if(ret < 0){
1161
if(errno == ENETUNREACH
1221
if(((errno == ENETUNREACH) or (errno == EHOSTUNREACH))
1162
1222
and if_index != AVAHI_IF_UNSPEC
1163
1223
and connect_to == NULL
1164
1224
and not route_added and
1402
1462
free(decrypted_buffer);
1403
1463
free(buffer);
1404
1464
if(tcp_sd >= 0){
1405
ret = (int)TEMP_FAILURE_RETRY(close(tcp_sd));
1465
ret = close(tcp_sd);
1406
1466
}
1407
1467
if(ret == -1){
1408
1468
if(e == 0){
1563
1623
__attribute__((nonnull, warn_unused_result))
1564
1624
bool get_flags(const char *ifname, struct ifreq *ifr){
1565
1625
int ret;
1566
error_t ret_errno;
1626
int old_errno;
1567
1627
1568
1628
int s = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1569
1629
if(s < 0){
1570
ret_errno = errno;
1630
old_errno = errno;
1571
1631
perror_plus("socket");
1572
errno = ret_errno;
1632
errno = old_errno;
1573
1633
return false;
1574
1634
}
1575
strcpy(ifr->ifr_name, ifname);
1635
strncpy(ifr->ifr_name, ifname, IF_NAMESIZE);
1636
ifr->ifr_name[IF_NAMESIZE-1] = '\0'; /* NUL terminate */
1576
1637
ret = ioctl(s, SIOCGIFFLAGS, ifr);
1577
1638
if(ret == -1){
1578
1639
if(debug){
1579
ret_errno = errno;
1640
old_errno = errno;
1580
1641
perror_plus("ioctl SIOCGIFFLAGS");
1581
errno = ret_errno;
1642
errno = old_errno;
1582
1643
}
1583
1644
return false;
1584
1645
}
1848
1909
return;
1849
1910
}
1850
1911
}
1851
#ifdef __GLIBC__
1852
#if __GLIBC_PREREQ(2, 15)
1853
1912
int numhooks = scandirat(hookdir_fd, ".", &direntries,
1854
1913
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
1914
if(numhooks == -1){
1864
1915
perror_plus("scandir");
1865
1916
return;
1947
1998
perror_plus("openat");
1948
1999
_exit(EXIT_FAILURE);
1949
2000
}
1950
if((int)TEMP_FAILURE_RETRY(close(hookdir_fd)) == -1){
2001
if(close(hookdir_fd) == -1){
1951
2002
perror_plus("close");
1952
2003
_exit(EXIT_FAILURE);
1953
2004
}
1956
2007
perror_plus("dup2(devnull, STDIN_FILENO)");
1957
2008
_exit(EX_OSERR);
1958
2009
}
1959
ret = (int)TEMP_FAILURE_RETRY(close(devnull));
2010
ret = close(devnull);
1960
2011
if(ret == -1){
1961
2012
perror_plus("close");
1962
2013
_exit(EX_OSERR);
2011
2062
free(direntry);
2012
2063
}
2013
2064
free(direntries);
2014
if((int)TEMP_FAILURE_RETRY(close(hookdir_fd)) == -1){
2065
if(close(hookdir_fd) == -1){
2015
2066
perror_plus("close");
2016
2067
} else {
2017
2068
hookdir_fd = -1;
2020
2071
}
2021
2072
2022
2073
__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;
2074
int bring_up_interface(const char *const interface,
2075
const float delay){
2076
int old_errno = errno;
2026
2077
int ret;
2027
2078
struct ifreq network;
2028
2079
unsigned int if_index = if_nametoindex(interface);
2038
2089
}
2039
2090
2040
2091
if(not interface_is_up(interface)){
2041
error_t ret_errno = 0, ioctl_errno = 0;
2092
int ret_errno = 0;
2093
int ioctl_errno = 0;
2042
2094
if(not get_flags(interface, &network)){
2043
2095
ret_errno = errno;
2044
2096
fprintf_plus(stderr, "Failed to get flags for interface "
2057
2109
}
2058
2110
2059
2111
if(quit_now){
2060
ret = (int)TEMP_FAILURE_RETRY(close(sd));
2112
ret = close(sd);
2061
2113
if(ret == -1){
2062
2114
perror_plus("close");
2063
2115
}
2113
2165
}
2114
2166
2115
2167
/* Close the socket */
2116
ret = (int)TEMP_FAILURE_RETRY(close(sd));
2168
ret = close(sd);
2117
2169
if(ret == -1){
2118
2170
perror_plus("close");
2119
2171
}
2147
2199
}
2148
2200
2149
2201
__attribute__((nonnull, warn_unused_result))
2150
error_t take_down_interface(const char *const interface){
2151
error_t old_errno = errno;
2202
int take_down_interface(const char *const interface){
2203
int old_errno = errno;
2152
2204
struct ifreq network;
2153
2205
unsigned int if_index = if_nametoindex(interface);
2154
2206
if(if_index == 0){
2157
2209
return ENXIO;
2158
2210
}
2159
2211
if(interface_is_up(interface)){
2160
error_t ret_errno = 0, ioctl_errno = 0;
2212
int ret_errno = 0;
2213
int ioctl_errno = 0;
2161
2214
if(not get_flags(interface, &network) and debug){
2162
2215
ret_errno = errno;
2163
2216
fprintf_plus(stderr, "Failed to get flags for interface "
2201
2254
}
2202
2255
2203
2256
/* Close the socket */
2204
int ret = (int)TEMP_FAILURE_RETRY(close(sd));
2257
int ret = close(sd);
2205
2258
if(ret == -1){
2206
2259
perror_plus("close");
2207
2260
}
2223
2276
2224
2277
int main(int argc, char *argv[]){
2225
2278
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 };
2279
.priority = "SECURE256:!CTYPE-X.509"
2280
":+CTYPE-OPENPGP:!RSA:+SIGN-DSA-SHA256",
2281
.current_server = NULL, .interfaces = NULL,
2282
.interfaces_size = 0 };
2229
2283
AvahiSServiceBrowser *sb = NULL;
2230
2284
error_t ret_errno;
2231
2285
int ret;
2240
2294
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
2241
2295
const char *seckey = PATHDIR "/" SECKEY;
2242
2296
const char *pubkey = PATHDIR "/" PUBKEY;
2297
const char *dh_params_file = NULL;
2243
2298
char *interfaces_hooks = NULL;
2244
2299
2245
2300
bool gnutls_initialized = false;
2298
2353
.doc = "Bit length of the prime number used in the"
2299
2354
" Diffie-Hellman key exchange",
2300
2355
.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 },
2301
2361
{ .name = "priority", .key = 130,
2302
2362
.arg = "STRING",
2303
2363
.doc = "GnuTLS priority string for the TLS handshake",
2358
2418
}
2359
2419
mc.dh_bits = (typeof(mc.dh_bits))tmpmax;
2360
2420
break;
2421
case 134: /* --dh-params */
2422
dh_params_file = arg;
2423
break;
2361
2424
case 130: /* --priority */
2362
2425
mc.priority = arg;
2363
2426
break;
2403
2466
.args_doc = "",
2404
2467
.doc = "Mandos client -- Get and decrypt"
2405
2468
" passwords from a Mandos server" };
2406
ret = argp_parse(&argp, argc, argv,
2407
ARGP_IN_ORDER | ARGP_NO_HELP, 0, NULL);
2408
switch(ret){
2469
ret_errno = argp_parse(&argp, argc, argv,
2470
ARGP_IN_ORDER | ARGP_NO_HELP, 0, NULL);
2471
switch(ret_errno){
2409
2472
case 0:
2410
2473
break;
2411
2474
case ENOMEM:
2412
2475
default:
2413
errno = ret;
2476
errno = ret_errno;
2414
2477
perror_plus("argp_parse");
2415
2478
exitcode = EX_OSERR;
2416
2479
goto end;
2425
2488
<http://bugs.debian.org/633582> */
2426
2489
2427
2490
/* Re-raise privileges */
2428
ret_errno = raise_privileges();
2429
if(ret_errno != 0){
2430
errno = ret_errno;
2491
ret = raise_privileges();
2492
if(ret != 0){
2493
errno = ret;
2431
2494
perror_plus("Failed to raise privileges");
2432
2495
} else {
2433
2496
struct stat st;
2449
2512
}
2450
2513
}
2451
2514
}
2452
TEMP_FAILURE_RETRY(close(seckey_fd));
2515
close(seckey_fd);
2453
2516
}
2454
2517
}
2455
2518
2470
2533
}
2471
2534
}
2472
2535
}
2473
TEMP_FAILURE_RETRY(close(pubkey_fd));
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);
2474
2559
}
2475
2560
}
2476
2561
2477
2562
/* Lower privileges */
2478
ret_errno = lower_privileges();
2479
if(ret_errno != 0){
2480
errno = ret_errno;
2563
ret = lower_privileges();
2564
if(ret != 0){
2565
errno = ret;
2481
2566
perror_plus("Failed to lower privileges");
2482
2567
}
2483
2568
}
2653
2738
errno = bring_up_interface(interface, delay);
2654
2739
if(not interface_was_up){
2655
2740
if(errno != 0){
2656
perror_plus("Failed to bring up interface");
2741
fprintf_plus(stderr, "Failed to bring up interface \"%s\":"
2742
" %s\n", interface, strerror(errno));
2657
2743
} else {
2658
2744
errno = argz_add(&interfaces_to_take_down,
2659
2745
&interfaces_to_take_down_size,
2682
2768
goto end;
2683
2769
}
2684
2770
2685
ret = init_gnutls_global(pubkey, seckey, &mc);
2771
ret = init_gnutls_global(pubkey, seckey, dh_params_file, &mc);
2686
2772
if(ret == -1){
2687
2773
fprintf_plus(stderr, "init_gnutls_global failed\n");
2688
2774
exitcode = EX_UNAVAILABLE;
2810
2896
2811
2897
/* Allocate a new server */
2812
2898
mc.server = avahi_server_new(avahi_simple_poll_get(simple_poll),
2813
&config, NULL, NULL, &ret_errno);
2899
&config, NULL, NULL, &ret);
2814
2900
2815
2901
/* Free the Avahi configuration data */
2816
2902
avahi_server_config_free(&config);
2819
2905
/* Check if creating the Avahi server object succeeded */
2820
2906
if(mc.server == NULL){
2821
2907
fprintf_plus(stderr, "Failed to create Avahi server: %s\n",
2822
avahi_strerror(ret_errno));
2908
avahi_strerror(ret));
2823
2909
exitcode = EX_UNAVAILABLE;
2824
2910
goto end;
2825
2911
}
2877
2963
2878
2964
if(gnutls_initialized){
2879
2965
gnutls_certificate_free_credentials(mc.cred);
2880
gnutls_global_deinit();
2881
2966
gnutls_dh_params_deinit(mc.dh_params);
2882
2967
}
2883
2968
2906
2991
2907
2992
/* Re-raise privileges */
2908
2993
{
2909
ret_errno = raise_privileges();
2910
if(ret_errno != 0){
2911
errno = ret_errno;
2994
ret = raise_privileges();
2995
if(ret != 0){
2996
errno = ret;
2912
2997
perror_plus("Failed to raise privileges");
2913
2998
} else {
2914
2999
2922
3007
while((interface=argz_next(interfaces_to_take_down,
2923
3008
interfaces_to_take_down_size,
2924
3009
interface))){
2925
ret_errno = take_down_interface(interface);
2926
if(ret_errno != 0){
2927
errno = ret_errno;
3010
ret = take_down_interface(interface);
3011
if(ret != 0){
3012
errno = ret;
2928
3013
perror_plus("Failed to take down interface");
2929
3014
}
2930
3015
}
2935
3020
}
2936
3021
}
2937
3022
2938
ret_errno = lower_privileges_permanently();
2939
if(ret_errno != 0){
2940
errno = ret_errno;
3023
ret = lower_privileges_permanently();
3024
if(ret != 0){
3025
errno = ret;
2941
3026
perror_plus("Failed to lower privileges permanently");
2942
3027
}
2943
3028
}
2945
3030
free(interfaces_to_take_down);
2946
3031
free(interfaces_hooks);
2947
3032
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
2948
3089
/* Removes the GPGME temp directory and all files inside */
2949
3090
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
}
3091
clean_dir_at(-1, tempdir, 0);
2993
3092
}
2994
3093
2995
3094
if(quit_now){
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0