To get this branch, use:
bzr branch
http://bzr.recompile.se/loggerhead/mandos/trunk
« back to all changes in this revision
Viewing changes to plugins.d/mandos-client.c
- browse files at revision 237.4.100
- compare with another revision
- download diff
- download tarball
- view history from revision 237.4.100
- Committer: Teddy Hogeborn
- Date: 2018-08-19 20:17:48 UTC
- mto: This revision was merged to the branch mainline in revision 959.
- Revision ID: teddy@recompile.se-20180819201748-4o2n84ltphj9zikx
Tags: version-1.7.20-1
* Makefile (version): Change to 1.7.20.
* NEWS (Version 1.7.20): Add new entry.
* debian/changelog (1.7.20-1): - '' -
* NEWS (Version 1.7.20): Add new entry.
* debian/changelog (1.7.20-1): - '' -
- files removed:
- debian/mandos-client.templates
- debian/tests
- dracut-module
- files modified:
- .bzrignore
added
removed
plugins.d/mandos-client.c
9
9
* "browse_callback", and parts of "main".
10
10
*
11
11
* Everything else is
12
* Copyright © 2008-2022 Teddy Hogeborn
13
* Copyright © 2008-2022 Björn Påhlsson
12
* Copyright © 2008-2018 Teddy Hogeborn
13
* Copyright © 2008-2018 Björn Påhlsson
14
14
*
15
15
* This file is part of Mandos.
16
16
*
38
38
#define _FILE_OFFSET_BITS 64
39
39
#endif /* not _FILE_OFFSET_BITS */
40
40
41
#define _GNU_SOURCE /* program_invocation_short_name,
42
TEMP_FAILURE_RETRY(), O_CLOEXEC,
43
scandirat(), asprintf() */
41
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), asprintf() */
42
43
#include <stdio.h> /* fprintf(), stderr, fwrite(),
44
stdout, ferror() */
45
#include <stdint.h> /* uint16_t, uint32_t, intptr_t */
46
#include <stddef.h> /* NULL, size_t, ssize_t */
47
#include <stdlib.h> /* free(), EXIT_SUCCESS, srand(),
48
strtof(), abort() */
44
49
#include <stdbool.h> /* bool, false, true */
45
#include <argp.h> /* argp_program_version,
46
argp_program_bug_address,
47
struct argp_option,
48
struct argp_state, argp_error(),
49
argp_state_help,
50
ARGP_HELP_STD_HELP,
51
ARGP_HELP_EXIT_ERR,
52
ARGP_HELP_EXIT_OK, ARGP_HELP_USAGE,
53
argp_err_exit_status,
54
ARGP_ERR_UNKNOWN, struct argp,
55
argp_parse(), ARGP_IN_ORDER,
56
ARGP_NO_HELP */
57
#include <stddef.h> /* NULL, size_t */
58
#include <sys/types.h> /* uid_t, gid_t, sig_atomic_t,
59
seteuid(), setuid(), pid_t,
60
setgid(), getuid(), getgid() */
61
#include <unistd.h> /* uid_t, gid_t, TEMP_FAILURE_RETRY(),
62
seteuid(), setuid(), close(),
63
ssize_t, read(), fork(), setgid(),
64
_exit(), dup2(), STDIN_FILENO,
65
STDERR_FILENO, STDOUT_FILENO,
66
fexecve(), write(), getuid(),
67
getgid(), fchown(), symlink(),
68
sleep(), unlinkat(), pause() */
69
#include <netinet/in.h> /* in_port_t, struct sockaddr_in6,
70
sa_family_t, struct sockaddr_in,
71
htons(), IN6_IS_ADDR_LINKLOCAL,
72
INET_ADDRSTRLEN, INET6_ADDRSTRLEN,
73
ntohl(), IPPROTO_IP */
74
#include <time.h> /* struct timespec, clock_gettime(),
75
CLOCK_MONOTONIC, time_t, struct tm,
76
gmtime_r(), clock_settime(),
77
CLOCK_REALTIME, nanosleep() */
78
#include <errno.h> /* errno,
79
program_invocation_short_name,
80
EINTR, EINVAL, ENETUNREACH,
50
#include <string.h> /* strcmp(), strlen(), strerror(),
51
asprintf(), strncpy(), strsignal()
52
*/
53
#include <sys/ioctl.h> /* ioctl */
54
#include <sys/types.h> /* socket(), inet_pton(), sockaddr,
55
sockaddr_in6, PF_INET6,
56
SOCK_STREAM, uid_t, gid_t, open(),
57
opendir(), DIR */
58
#include <sys/stat.h> /* open(), S_ISREG */
59
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
60
inet_pton(), connect(),
61
getnameinfo() */
62
#include <fcntl.h> /* open(), unlinkat(), AT_REMOVEDIR */
63
#include <dirent.h> /* opendir(), struct dirent, readdir()
64
*/
65
#include <inttypes.h> /* PRIu16, PRIdMAX, intmax_t,
66
strtoimax() */
67
#include <errno.h> /* perror(), errno, EINTR, EINVAL,
68
EAI_SYSTEM, ENETUNREACH,
81
69
EHOSTUNREACH, ECONNREFUSED, EPROTO,
82
EIO, ENOENT, ENXIO, error_t,
83
ENOMEM, EISDIR, ENOTEMPTY */
84
#include <stdio.h> /* fprintf(), stderr, perror(), FILE,
85
vfprintf(), off_t, SEEK_SET,
86
stdout, fwrite(), ferror(),
87
fflush(), asprintf() */
88
#include <stdarg.h> /* va_list, va_start(), vfprintf() */
89
#include <stdlib.h> /* realloc(), free(), malloc(),
90
getenv(), EXIT_FAILURE, setenv(),
91
EXIT_SUCCESS, strtof(), strtod(),
92
srand(), mkdtemp(), abort() */
93
#include <string.h> /* strdup(), strcmp(), strlen(),
94
strerror(), strncpy(), strspn(),
95
memcpy(), strrchr(), strchr(),
96
strsignal() */
97
#include <fcntl.h> /* open(), O_RDONLY, O_DIRECTORY,
98
O_PATH, O_CLOEXEC, openat(),
99
O_NOFOLLOW, AT_REMOVEDIR */
100
#include <iso646.h> /* or, and, not */
101
#include <sys/stat.h> /* struct stat, fstat(), fstatat(),
102
S_ISREG(), S_IXUSR, S_IXGRP,
103
S_IXOTH, lstat() */
104
#include <net/if.h> /* IF_NAMESIZE, if_indextoname(),
105
if_nametoindex(), SIOCGIFFLAGS,
106
IFF_LOOPBACK, IFF_POINTOPOINT,
107
IFF_BROADCAST, IFF_NOARP, IFF_UP,
108
IFF_RUNNING, SIOCSIFFLAGS */
109
#include <sysexits.h> /* EX_NOPERM, EX_OSERR,
110
EX_UNAVAILABLE, EX_USAGE */
70
EIO, ENOENT, ENXIO, ENOMEM, EISDIR,
71
ENOTEMPTY,
72
program_invocation_short_name */
73
#include <time.h> /* nanosleep(), time(), sleep() */
74
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
75
SIOCSIFFLAGS, if_indextoname(),
76
if_nametoindex(), IF_NAMESIZE */
77
#include <netinet/in.h> /* IN6_IS_ADDR_LINKLOCAL,
78
INET_ADDRSTRLEN, INET6_ADDRSTRLEN
79
*/
80
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
81
getuid(), getgid(), seteuid(),
82
setgid(), pause(), _exit(),
83
unlinkat() */
84
#include <arpa/inet.h> /* inet_pton(), htons() */
85
#include <iso646.h> /* not, or, and */
86
#include <argp.h> /* struct argp_option, error_t, struct
87
argp_state, struct argp,
88
argp_parse(), ARGP_KEY_ARG,
89
ARGP_KEY_END, ARGP_ERR_UNKNOWN */
90
#include <signal.h> /* sigemptyset(), sigaddset(),
91
sigaction(), SIGTERM, sig_atomic_t,
92
raise() */
93
#include <sysexits.h> /* EX_OSERR, EX_USAGE, EX_UNAVAILABLE,
94
EX_NOHOST, EX_IOERR, EX_PROTOCOL */
95
#include <sys/wait.h> /* waitpid(), WIFEXITED(),
96
WEXITSTATUS(), WTERMSIG() */
111
97
#include <grp.h> /* setgroups() */
112
#include <sys/wait.h> /* waitpid(), WIFEXITED(),
113
WEXITSTATUS(), WIFSIGNALED(),
114
WTERMSIG() */
115
#include <signal.h> /* kill(), SIGTERM, struct sigaction,
116
SIG_DFL, sigemptyset(),
117
sigaddset(), SIGINT, SIGHUP,
118
SIG_IGN, raise() */
119
#include <sys/socket.h> /* struct sockaddr_storage, AF_INET6,
120
PF_INET6, AF_INET, PF_INET,
121
socket(), SOCK_STREAM,
122
SOCK_CLOEXEC, struct sockaddr,
123
connect(), SOCK_DGRAM */
124
#include <argz.h> /* argz_next(), argz_add_sep(),
125
argz_delete(), argz_stringify(),
126
argz_add(), argz_count() */
127
#include <inttypes.h> /* PRIuMAX, uintmax_t, uint32_t,
128
PRIdMAX, PRIu16, intmax_t,
129
strtoimax() */
130
#include <arpa/inet.h> /* inet_pton() */
131
#include <stdint.h> /* uint32_t, intptr_t, uint16_t */
98
#include <argz.h> /* argz_add_sep(), argz_next(),
99
argz_delete(), argz_append(),
100
argz_stringify(), argz_add(),
101
argz_count() */
132
102
#include <netdb.h> /* getnameinfo(), NI_NUMERICHOST,
133
103
EAI_SYSTEM, gai_strerror() */
134
#include <sys/ioctl.h> /* ioctl() */
135
#include <dirent.h> /* struct dirent, scandirat(),
136
alphasort(), scandir() */
137
#include <limits.h> /* INT_MAX */
138
104
139
105
#ifdef __linux__
140
106
#include <sys/klog.h> /* klogctl() */
153
119
154
120
/* GnuTLS */
155
121
#include <gnutls/gnutls.h> /* All GnuTLS types, constants and
156
functions: gnutls_*, GNUTLS_* */
157
#if GNUTLS_VERSION_NUMBER < 0x030600
122
functions:
123
gnutls_*
124
init_gnutls_session(),
125
GNUTLS_* */
158
126
#include <gnutls/openpgp.h>
159
127
/* gnutls_certificate_set_openpgp_key_file(),
160
128
GNUTLS_OPENPGP_FMT_BASE64 */
161
#elif GNUTLS_VERSION_NUMBER >= 0x030606
162
#include <gnutls/x509.h> /* GNUTLS_PKCS_PLAIN,
163
GNUTLS_PKCS_NULL_PASSWORD */
164
#endif
165
129
166
130
/* GPGME */
167
131
#include <gpgme.h> /* All GPGME types, constants and
168
132
functions:
169
gpgme_*, GPG_ERR_NO_*,
170
GPGME_IMPORT_*
171
GPGME_PROTOCOL_OpenPGP */
133
gpgme_*
134
GPGME_PROTOCOL_OpenPGP,
135
GPG_ERR_NO_* */
172
136
173
137
#define BUFFER_SIZE 256
174
138
175
139
#define PATHDIR "/conf/conf.d/mandos"
176
140
#define SECKEY "seckey.txt"
177
141
#define PUBKEY "pubkey.txt"
178
#define TLS_PRIVKEY "tls-privkey.pem"
179
#define TLS_PUBKEY "tls-pubkey.pem"
180
142
#define HOOKDIR "/lib/mandos/network-hooks.d"
181
143
182
144
bool debug = false;
426
388
fprintf_plus(stderr,
427
389
"Setting system clock to key file mtime");
428
390
}
429
if(clock_settime(CLOCK_REALTIME, &keystat.st_mtim) != 0){
430
perror_plus("clock_settime");
391
time_t keytime = keystat.st_mtim.tv_sec;
392
if(stime(&keytime) != 0){
393
perror_plus("stime");
431
394
}
432
395
ret = lower_privileges();
433
396
if(ret != 0){
736
699
const char *dhparamsfilename,
737
700
mandos_context *mc){
738
701
int ret;
702
unsigned int uret;
739
703
740
704
if(debug){
741
705
fprintf_plus(stderr, "Initializing GnuTLS\n");
758
722
}
759
723
760
724
if(debug){
761
fprintf_plus(stderr, "Attempting to use public key %s and"
762
" private key %s as GnuTLS credentials\n",
725
fprintf_plus(stderr, "Attempting to use OpenPGP public key %s and"
726
" secret key %s as GnuTLS credentials\n",
763
727
pubkeyfilename,
764
728
seckeyfilename);
765
729
}
766
730
767
#if GNUTLS_VERSION_NUMBER >= 0x030606
768
ret = gnutls_certificate_set_rawpk_key_file
769
(mc->cred, pubkeyfilename, seckeyfilename,
770
GNUTLS_X509_FMT_PEM, /* format */
771
NULL, /* pass */
772
/* key_usage */
773
GNUTLS_KEY_DIGITAL_SIGNATURE | GNUTLS_KEY_KEY_ENCIPHERMENT,
774
NULL, /* names */
775
0, /* names_length */
776
/* privkey_flags */
777
GNUTLS_PKCS_PLAIN | GNUTLS_PKCS_NULL_PASSWORD,
778
0); /* pkcs11_flags */
779
#elif GNUTLS_VERSION_NUMBER < 0x030600
780
731
ret = gnutls_certificate_set_openpgp_key_file
781
732
(mc->cred, pubkeyfilename, seckeyfilename,
782
733
GNUTLS_OPENPGP_FMT_BASE64);
783
#else
784
#error "Needs GnuTLS 3.6.6 or later, or before 3.6.0"
785
#endif
786
734
if(ret != GNUTLS_E_SUCCESS){
787
735
fprintf_plus(stderr,
788
"Error[%d] while reading the key pair ('%s',"
736
"Error[%d] while reading the OpenPGP key pair ('%s',"
789
737
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
790
738
fprintf_plus(stderr, "The GnuTLS error is: %s\n",
791
739
safer_gnutls_strerror(ret));
862
810
}
863
811
if(dhparamsfilename == NULL){
864
812
if(mc->dh_bits == 0){
865
#if GNUTLS_VERSION_NUMBER < 0x030600
866
813
/* Find out the optimal number of DH bits */
867
814
/* Try to read the private key file */
868
815
gnutls_datum_t buffer = { .data = NULL, .size = 0 };
948
895
}
949
896
}
950
897
}
951
unsigned int uret = gnutls_sec_param_to_pk_bits(GNUTLS_PK_DH, sec_param);
898
uret = gnutls_sec_param_to_pk_bits(GNUTLS_PK_DH, sec_param);
952
899
if(uret != 0){
953
900
mc->dh_bits = uret;
954
901
if(debug){
966
913
safer_gnutls_strerror(ret));
967
914
goto globalfail;
968
915
}
969
#endif
970
} else { /* dh_bits != 0 */
971
if(debug){
972
fprintf_plus(stderr, "DH bits explicitly set to %u\n",
973
mc->dh_bits);
974
}
975
ret = gnutls_dh_params_generate2(mc->dh_params, mc->dh_bits);
976
if(ret != GNUTLS_E_SUCCESS){
977
fprintf_plus(stderr, "Error in GnuTLS prime generation (%u"
978
" bits): %s\n", mc->dh_bits,
979
safer_gnutls_strerror(ret));
980
goto globalfail;
981
}
982
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
916
} else if(debug){
917
fprintf_plus(stderr, "DH bits explicitly set to %u\n",
918
mc->dh_bits);
919
}
920
ret = gnutls_dh_params_generate2(mc->dh_params, mc->dh_bits);
921
if(ret != GNUTLS_E_SUCCESS){
922
fprintf_plus(stderr, "Error in GnuTLS prime generation (%u"
923
" bits): %s\n", mc->dh_bits,
924
safer_gnutls_strerror(ret));
925
goto globalfail;
983
926
}
984
927
}
928
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
985
929
986
930
return 0;
987
931
998
942
int ret;
999
943
/* GnuTLS session creation */
1000
944
do {
1001
ret = gnutls_init(session, (GNUTLS_SERVER
1002
#if GNUTLS_VERSION_NUMBER >= 0x030506
1003
| GNUTLS_NO_TICKETS
1004
#endif
1005
#if GNUTLS_VERSION_NUMBER >= 0x030606
1006
| GNUTLS_ENABLE_RAWPK
1007
#endif
1008
));
945
ret = gnutls_init(session, GNUTLS_SERVER);
1009
946
if(quit_now){
1010
947
return -1;
1011
948
}
1103
1040
ret = setgid(0);
1104
1041
if(ret == -1){
1105
1042
perror_plus("setgid");
1106
close(devnull);
1107
1043
_exit(EX_NOPERM);
1108
1044
}
1109
1045
/* Reset supplementary groups */
1111
1047
ret = setgroups(0, NULL);
1112
1048
if(ret == -1){
1113
1049
perror_plus("setgroups");
1114
close(devnull);
1115
1050
_exit(EX_NOPERM);
1116
1051
}
1117
1052
}
1118
1053
ret = dup2(devnull, STDIN_FILENO);
1119
1054
if(ret == -1){
1120
1055
perror_plus("dup2(devnull, STDIN_FILENO)");
1121
close(devnull);
1122
1056
_exit(EX_OSERR);
1123
1057
}
1124
1058
ret = close(devnull);
1125
1059
if(ret == -1){
1126
1060
perror_plus("close");
1061
_exit(EX_OSERR);
1127
1062
}
1128
1063
ret = dup2(STDERR_FILENO, STDOUT_FILENO);
1129
1064
if(ret == -1){
1164
1099
}
1165
1100
if(pid == -1){
1166
1101
perror_plus("fork");
1167
close(devnull);
1168
1102
return false;
1169
1103
}
1170
ret = close(devnull);
1171
if(ret == -1){
1172
perror_plus("close");
1173
}
1174
1104
int status;
1175
1105
pid_t pret = -1;
1176
1106
errno = 0;
2497
2427
2498
2428
int main(int argc, char *argv[]){
2499
2429
mandos_context mc = { .server = NULL, .dh_bits = 0,
2500
#if GNUTLS_VERSION_NUMBER >= 0x030606
2501
.priority = "SECURE128:!CTYPE-X.509"
2502
":+CTYPE-RAWPK:!RSA:!VERS-ALL:+VERS-TLS1.3"
2503
":%PROFILE_ULTRA",
2504
#elif GNUTLS_VERSION_NUMBER < 0x030600
2505
2430
.priority = "SECURE256:!CTYPE-X.509"
2506
2431
":+CTYPE-OPENPGP:!RSA:+SIGN-DSA-SHA256",
2507
#else
2508
#error "Needs GnuTLS 3.6.6 or later, or before 3.6.0"
2509
#endif
2510
2432
.current_server = NULL, .interfaces = NULL,
2511
2433
.interfaces_size = 0 };
2512
2434
AvahiSServiceBrowser *sb = NULL;
2523
2445
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
2524
2446
const char *seckey = PATHDIR "/" SECKEY;
2525
2447
const char *pubkey = PATHDIR "/" PUBKEY;
2526
#if GNUTLS_VERSION_NUMBER >= 0x030606
2527
const char *tls_privkey = PATHDIR "/" TLS_PRIVKEY;
2528
const char *tls_pubkey = PATHDIR "/" TLS_PUBKEY;
2529
#endif
2530
2448
const char *dh_params_file = NULL;
2531
2449
char *interfaces_hooks = NULL;
2532
2450
2580
2498
{ .name = "pubkey", .key = 'p',
2581
2499
.arg = "FILE",
2582
2500
.doc = "OpenPGP public key file base name",
2583
.group = 1 },
2584
{ .name = "tls-privkey", .key = 't',
2585
.arg = "FILE",
2586
#if GNUTLS_VERSION_NUMBER >= 0x030606
2587
.doc = "TLS private key file base name",
2588
#else
2589
.doc = "Dummy; ignored (requires GnuTLS 3.6.6)",
2590
#endif
2591
.group = 1 },
2592
{ .name = "tls-pubkey", .key = 'T',
2593
.arg = "FILE",
2594
#if GNUTLS_VERSION_NUMBER >= 0x030606
2595
.doc = "TLS public key file base name",
2596
#else
2597
.doc = "Dummy; ignored (requires GnuTLS 3.6.6)",
2598
#endif
2599
.group = 1 },
2501
.group = 2 },
2600
2502
{ .name = "dh-bits", .key = 129,
2601
2503
.arg = "BITS",
2602
2504
.doc = "Bit length of the prime number used in the"
2658
2560
case 'p': /* --pubkey */
2659
2561
pubkey = arg;
2660
2562
break;
2661
case 't': /* --tls-privkey */
2662
#if GNUTLS_VERSION_NUMBER >= 0x030606
2663
tls_privkey = arg;
2664
#endif
2665
break;
2666
case 'T': /* --tls-pubkey */
2667
#if GNUTLS_VERSION_NUMBER >= 0x030606
2668
tls_pubkey = arg;
2669
#endif
2670
break;
2671
2563
case 129: /* --dh-bits */
2672
2564
errno = 0;
2673
2565
tmpmax = strtoimax(arg, &tmp, 10);
2708
2600
argp_state_help(state, state->out_stream,
2709
2601
(ARGP_HELP_STD_HELP | ARGP_HELP_EXIT_ERR)
2710
2602
& ~(unsigned int)ARGP_HELP_EXIT_OK);
2711
__builtin_unreachable();
2712
2603
case -3: /* --usage */
2713
2604
argp_state_help(state, state->out_stream,
2714
2605
ARGP_HELP_USAGE | ARGP_HELP_EXIT_ERR);
2715
__builtin_unreachable();
2716
2606
case 'V': /* --version */
2717
2607
fprintf_plus(state->out_stream, "%s\n", argp_program_version);
2718
2608
exit(argp_err_exit_status);
2745
2635
}
2746
2636
2747
2637
{
2638
/* Work around Debian bug #633582:
2639
<https://bugs.debian.org/633582> */
2640
2748
2641
/* Re-raise privileges */
2749
2642
ret = raise_privileges();
2750
2643
if(ret != 0){
2753
2646
} else {
2754
2647
struct stat st;
2755
2648
2756
/* Work around Debian bug #633582:
2757
<https://bugs.debian.org/633582> */
2758
2759
2649
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
2760
2650
int seckey_fd = open(seckey, O_RDONLY);
2761
2651
if(seckey_fd == -1){
2820
2710
}
2821
2711
}
2822
2712
2823
/* Work around Debian bug #981302
2824
<https://bugs.debian.org/981302> */
2825
if(lstat("/dev/fd", &st) != 0 and errno == ENOENT){
2826
ret = symlink("/proc/self/fd", "/dev/fd");
2827
if(ret == -1){
2828
perror_plus("Failed to create /dev/fd symlink");
2829
}
2830
}
2831
2832
2713
/* Lower privileges */
2833
2714
ret = lower_privileges();
2834
2715
if(ret != 0){
3038
2919
goto end;
3039
2920
}
3040
2921
3041
#if GNUTLS_VERSION_NUMBER >= 0x030606
3042
ret = init_gnutls_global(tls_pubkey, tls_privkey, dh_params_file, &mc);
3043
#elif GNUTLS_VERSION_NUMBER < 0x030600
3044
2922
ret = init_gnutls_global(pubkey, seckey, dh_params_file, &mc);
3045
#else
3046
#error "Needs GnuTLS 3.6.6 or later, or before 3.6.0"
3047
#endif
3048
2923
if(ret == -1){
3049
2924
fprintf_plus(stderr, "init_gnutls_global failed\n");
3050
2925
exitcode = EX_UNAVAILABLE;
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0