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- Committer: Teddy Hogeborn
- Date: 2009-02-12 19:08:35 UTC
- Revision ID: teddy@fukt.bsnet.se-20090212190835-dqv0piw2u254d0jc
* plugin-runner.c: Whitespace changes only.
added
removed
plugins.d/mandos-client.c
30
30
*/
31
31
32
32
/* Needed by GPGME, specifically gpgme_data_seek() */
33
#ifndef _LARGEFILE_SOURCE
34
33
#define _LARGEFILE_SOURCE
35
#endif
36
#ifndef _FILE_OFFSET_BITS
37
34
#define _FILE_OFFSET_BITS 64
38
#endif
39
35
40
36
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), asprintf() */
41
37
43
39
stdout, ferror(), remove() */
44
40
#include <stdint.h> /* uint16_t, uint32_t */
45
41
#include <stddef.h> /* NULL, size_t, ssize_t */
46
#include <stdlib.h> /* free(), EXIT_SUCCESS, srand(),
47
strtof(), abort() */
42
#include <stdlib.h> /* free(), EXIT_SUCCESS, EXIT_FAILURE,
43
srand(), strtof() */
48
44
#include <stdbool.h> /* bool, false, true */
49
45
#include <string.h> /* memset(), strcmp(), strlen(),
50
46
strerror(), asprintf(), strcpy() */
71
67
INET_ADDRSTRLEN, INET6_ADDRSTRLEN
72
68
*/
73
69
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
74
getuid(), getgid(), seteuid(),
75
setgid(), pause() */
70
getuid(), getgid(), setuid(),
71
setgid() */
76
72
#include <arpa/inet.h> /* inet_pton(), htons */
77
73
#include <iso646.h> /* not, or, and */
78
74
#include <argp.h> /* struct argp_option, error_t, struct
80
76
argp_parse(), ARGP_KEY_ARG,
81
77
ARGP_KEY_END, ARGP_ERR_UNKNOWN */
82
78
#include <signal.h> /* sigemptyset(), sigaddset(),
83
sigaction(), SIGTERM, sig_atomic_t,
84
raise() */
85
#include <sysexits.h> /* EX_OSERR, EX_USAGE, EX_UNAVAILABLE,
86
EX_NOHOST, EX_IOERR, EX_PROTOCOL */
79
sigaction(), SIGTERM, sigaction,
80
sig_atomic_t */
87
81
88
82
#ifdef __linux__
89
83
#include <sys/klog.h> /* klogctl() */
127
121
static const char mandos_protocol_version[] = "1";
128
122
const char *argp_program_version = "mandos-client " VERSION;
129
123
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
130
static const char sys_class_net[] = "/sys/class/net";
131
char *connect_to = NULL;
132
124
133
125
/* Used for passing in values through the Avahi callback functions */
134
126
typedef struct {
146
138
.dh_bits = 1024, .priority = "SECURE256"
147
139
":!CTYPE-X.509:+CTYPE-OPENPGP" };
148
140
149
sig_atomic_t quit_now = 0;
150
int signal_received = 0;
151
152
141
/*
153
142
* Make additional room in "buffer" for at least BUFFER_SIZE more
154
143
* bytes. "buffer_capacity" is how much is currently allocated,
171
160
*/
172
161
static bool init_gpgme(const char *seckey,
173
162
const char *pubkey, const char *tempdir){
163
int ret;
174
164
gpgme_error_t rc;
175
165
gpgme_engine_info_t engine_info;
176
166
179
169
* Helper function to insert pub and seckey to the engine keyring.
180
170
*/
181
171
bool import_key(const char *filename){
182
int ret;
183
172
int fd;
184
173
gpgme_data_t pgp_data;
185
174
256
245
return false;
257
246
}
258
247
259
return true;
248
return true;
260
249
}
261
250
262
251
/*
316
305
}
317
306
gpgme_recipient_t recipient;
318
307
recipient = result->recipients;
319
while(recipient != NULL){
320
fprintf(stderr, "Public key algorithm: %s\n",
321
gpgme_pubkey_algo_name(recipient->pubkey_algo));
322
fprintf(stderr, "Key ID: %s\n", recipient->keyid);
323
fprintf(stderr, "Secret key available: %s\n",
324
recipient->status == GPG_ERR_NO_SECKEY
325
? "No" : "Yes");
326
recipient = recipient->next;
308
if(recipient){
309
while(recipient != NULL){
310
fprintf(stderr, "Public key algorithm: %s\n",
311
gpgme_pubkey_algo_name(recipient->pubkey_algo));
312
fprintf(stderr, "Key ID: %s\n", recipient->keyid);
313
fprintf(stderr, "Secret key available: %s\n",
314
recipient->status == GPG_ERR_NO_SECKEY
315
? "No" : "Yes");
316
recipient = recipient->next;
317
}
327
318
}
328
319
}
329
320
}
481
472
static int init_gnutls_session(gnutls_session_t *session){
482
473
int ret;
483
474
/* GnuTLS session creation */
484
do {
485
ret = gnutls_init(session, GNUTLS_SERVER);
486
if(quit_now){
487
return -1;
488
}
489
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
475
ret = gnutls_init(session, GNUTLS_SERVER);
490
476
if(ret != GNUTLS_E_SUCCESS){
491
477
fprintf(stderr, "Error in GnuTLS session initialization: %s\n",
492
478
safer_gnutls_strerror(ret));
494
480
495
481
{
496
482
const char *err;
497
do {
498
ret = gnutls_priority_set_direct(*session, mc.priority, &err);
499
if(quit_now){
500
gnutls_deinit(*session);
501
return -1;
502
}
503
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
483
ret = gnutls_priority_set_direct(*session, mc.priority, &err);
504
484
if(ret != GNUTLS_E_SUCCESS){
505
485
fprintf(stderr, "Syntax error at: %s\n", err);
506
486
fprintf(stderr, "GnuTLS error: %s\n",
510
490
}
511
491
}
512
492
513
do {
514
ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,
515
mc.cred);
516
if(quit_now){
517
gnutls_deinit(*session);
518
return -1;
519
}
520
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
493
ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,
494
mc.cred);
521
495
if(ret != GNUTLS_E_SUCCESS){
522
496
fprintf(stderr, "Error setting GnuTLS credentials: %s\n",
523
497
safer_gnutls_strerror(ret));
526
500
}
527
501
528
502
/* ignore client certificate if any. */
529
gnutls_certificate_server_set_request(*session, GNUTLS_CERT_IGNORE);
503
gnutls_certificate_server_set_request(*session,
504
GNUTLS_CERT_IGNORE);
530
505
531
506
gnutls_dh_set_prime_bits(*session, mc.dh_bits);
532
507
541
516
static int start_mandos_communication(const char *ip, uint16_t port,
542
517
AvahiIfIndex if_index,
543
518
int af){
544
int ret, tcp_sd = -1;
519
int ret, tcp_sd;
545
520
ssize_t sret;
546
521
union {
547
522
struct sockaddr_in in;
548
523
struct sockaddr_in6 in6;
549
524
} to;
550
525
char *buffer = NULL;
551
char *decrypted_buffer = NULL;
526
char *decrypted_buffer;
552
527
size_t buffer_length = 0;
553
528
size_t buffer_capacity = 0;
529
ssize_t decrypted_buffer_size;
554
530
size_t written;
555
int retval = -1;
531
int retval = 0;
556
532
gnutls_session_t session;
557
533
int pf; /* Protocol family */
558
534
559
errno = 0;
560
561
if(quit_now){
562
errno = EINTR;
563
return -1;
564
}
565
566
535
switch(af){
567
536
case AF_INET6:
568
537
pf = PF_INET6;
572
541
break;
573
542
default:
574
543
fprintf(stderr, "Bad address family: %d\n", af);
575
errno = EINVAL;
576
544
return -1;
577
545
}
578
546
588
556
589
557
tcp_sd = socket(pf, SOCK_STREAM, 0);
590
558
if(tcp_sd < 0){
591
int e = errno;
592
559
perror("socket");
593
errno = e;
594
goto mandos_end;
595
}
596
597
if(quit_now){
598
errno = EINTR;
599
goto mandos_end;
560
return -1;
600
561
}
601
562
602
563
memset(&to, 0, sizeof(to));
603
564
if(af == AF_INET6){
604
to.in6.sin6_family = (sa_family_t)af;
565
to.in6.sin6_family = (uint16_t)af;
605
566
ret = inet_pton(af, ip, &to.in6.sin6_addr);
606
567
} else { /* IPv4 */
607
568
to.in.sin_family = (sa_family_t)af;
608
569
ret = inet_pton(af, ip, &to.in.sin_addr);
609
570
}
610
571
if(ret < 0 ){
611
int e = errno;
612
572
perror("inet_pton");
613
errno = e;
614
goto mandos_end;
573
return -1;
615
574
}
616
575
if(ret == 0){
617
int e = errno;
618
576
fprintf(stderr, "Bad address: %s\n", ip);
619
errno = e;
620
goto mandos_end;
577
return -1;
621
578
}
622
579
if(af == AF_INET6){
623
580
to.in6.sin6_port = htons(port); /* Spurious warnings from
630
587
if(if_index == AVAHI_IF_UNSPEC){
631
588
fprintf(stderr, "An IPv6 link-local address is incomplete"
632
589
" without a network interface\n");
633
errno = EINVAL;
634
goto mandos_end;
590
return -1;
635
591
}
636
592
/* Set the network interface number as scope */
637
593
to.in6.sin6_scope_id = (uint32_t)if_index;
642
598
-Wunreachable-code */
643
599
}
644
600
645
if(quit_now){
646
errno = EINTR;
647
goto mandos_end;
648
}
649
650
601
if(debug){
651
602
if(af == AF_INET6 and if_index != AVAHI_IF_UNSPEC){
652
603
char interface[IF_NAMESIZE];
679
630
}
680
631
}
681
632
682
if(quit_now){
683
errno = EINTR;
684
goto mandos_end;
685
}
686
687
633
if(af == AF_INET6){
688
634
ret = connect(tcp_sd, &to.in6, sizeof(to));
689
635
} else {
690
636
ret = connect(tcp_sd, &to.in, sizeof(to)); /* IPv4 */
691
637
}
692
638
if(ret < 0){
693
int e = errno;
694
639
perror("connect");
695
errno = e;
696
goto mandos_end;
697
}
698
699
if(quit_now){
700
errno = EINTR;
701
goto mandos_end;
640
return -1;
702
641
}
703
642
704
643
const char *out = mandos_protocol_version;
708
647
ret = (int)TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
709
648
out_size - written));
710
649
if(ret == -1){
711
int e = errno;
712
650
perror("write");
713
errno = e;
651
retval = -1;
714
652
goto mandos_end;
715
653
}
716
654
written += (size_t)ret;
724
662
break;
725
663
}
726
664
}
727
728
if(quit_now){
729
errno = EINTR;
730
goto mandos_end;
731
}
732
665
}
733
666
734
667
if(debug){
735
668
fprintf(stderr, "Establishing TLS session with %s\n", ip);
736
669
}
737
670
738
if(quit_now){
739
errno = EINTR;
740
goto mandos_end;
741
}
742
743
671
gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t) tcp_sd);
744
672
745
if(quit_now){
746
errno = EINTR;
747
goto mandos_end;
748
}
749
750
do {
673
do{
751
674
ret = gnutls_handshake(session);
752
if(quit_now){
753
errno = EINTR;
754
goto mandos_end;
755
}
756
675
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
757
676
758
677
if(ret != GNUTLS_E_SUCCESS){
760
679
fprintf(stderr, "*** GnuTLS Handshake failed ***\n");
761
680
gnutls_perror(ret);
762
681
}
763
errno = EPROTO;
682
retval = -1;
764
683
goto mandos_end;
765
684
}
766
685
772
691
}
773
692
774
693
while(true){
775
776
if(quit_now){
777
errno = EINTR;
778
goto mandos_end;
779
}
780
781
694
buffer_capacity = incbuffer(&buffer, buffer_length,
782
695
buffer_capacity);
783
696
if(buffer_capacity == 0){
784
int e = errno;
785
697
perror("incbuffer");
786
errno = e;
787
goto mandos_end;
788
}
789
790
if(quit_now){
791
errno = EINTR;
698
retval = -1;
792
699
goto mandos_end;
793
700
}
794
701
803
710
case GNUTLS_E_AGAIN:
804
711
break;
805
712
case GNUTLS_E_REHANDSHAKE:
806
do {
713
do{
807
714
ret = gnutls_handshake(session);
808
809
if(quit_now){
810
errno = EINTR;
811
goto mandos_end;
812
}
813
715
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
814
716
if(ret < 0){
815
717
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
816
718
gnutls_perror(ret);
817
errno = EPROTO;
719
retval = -1;
818
720
goto mandos_end;
819
721
}
820
722
break;
821
723
default:
822
724
fprintf(stderr, "Unknown error while reading data from"
823
725
" encrypted session with Mandos server\n");
726
retval = -1;
824
727
gnutls_bye(session, GNUTLS_SHUT_RDWR);
825
errno = EIO;
826
728
goto mandos_end;
827
729
}
828
730
} else {
834
736
fprintf(stderr, "Closing TLS session\n");
835
737
}
836
738
837
if(quit_now){
838
errno = EINTR;
839
goto mandos_end;
840
}
841
842
do {
843
ret = gnutls_bye(session, GNUTLS_SHUT_RDWR);
844
if(quit_now){
845
errno = EINTR;
846
goto mandos_end;
847
}
848
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
739
gnutls_bye(session, GNUTLS_SHUT_RDWR);
849
740
850
741
if(buffer_length > 0){
851
ssize_t decrypted_buffer_size;
852
742
decrypted_buffer_size = pgp_packet_decrypt(buffer,
853
743
buffer_length,
854
744
&decrypted_buffer);
855
745
if(decrypted_buffer_size >= 0){
856
857
746
written = 0;
858
747
while(written < (size_t) decrypted_buffer_size){
859
if(quit_now){
860
errno = EINTR;
861
goto mandos_end;
862
}
863
864
748
ret = (int)fwrite(decrypted_buffer + written, 1,
865
749
(size_t)decrypted_buffer_size - written,
866
750
stdout);
867
751
if(ret == 0 and ferror(stdout)){
868
int e = errno;
869
752
if(debug){
870
753
fprintf(stderr, "Error writing encrypted data: %s\n",
871
754
strerror(errno));
872
755
}
873
errno = e;
874
goto mandos_end;
756
retval = -1;
757
break;
875
758
}
876
759
written += (size_t)ret;
877
760
}
878
retval = 0;
761
free(decrypted_buffer);
762
} else {
763
retval = -1;
879
764
}
765
} else {
766
retval = -1;
880
767
}
881
768
882
769
/* Shutdown procedure */
883
770
884
771
mandos_end:
885
{
886
int e = errno;
887
free(decrypted_buffer);
888
free(buffer);
889
if(tcp_sd >= 0){
890
ret = (int)TEMP_FAILURE_RETRY(close(tcp_sd));
891
}
892
if(ret == -1){
893
if(e == 0){
894
e = errno;
895
}
896
perror("close");
897
}
898
gnutls_deinit(session);
899
if(quit_now){
900
e = EINTR;
901
retval = -1;
902
}
903
errno = e;
772
free(buffer);
773
ret = (int)TEMP_FAILURE_RETRY(close(tcp_sd));
774
if(ret == -1){
775
perror("close");
904
776
}
777
gnutls_deinit(session);
905
778
return retval;
906
779
}
907
780
924
797
/* Called whenever a service has been resolved successfully or
925
798
timed out */
926
799
927
if(quit_now){
928
return;
929
}
930
931
800
switch(event){
932
801
default:
933
802
case AVAHI_RESOLVER_FAILURE:
970
839
/* Called whenever a new services becomes available on the LAN or
971
840
is removed from the LAN */
972
841
973
if(quit_now){
974
return;
975
}
976
977
842
switch(event){
978
843
default:
979
844
case AVAHI_BROWSER_FAILURE:
989
854
the callback function is called the Avahi server will free the
990
855
resolver for us. */
991
856
992
if(avahi_s_service_resolver_new(mc.server, interface, protocol,
993
name, type, domain, protocol, 0,
994
resolve_callback, NULL) == NULL)
857
if(!(avahi_s_service_resolver_new(mc.server, interface,
858
protocol, name, type, domain,
859
AVAHI_PROTO_INET6, 0,
860
resolve_callback, NULL)))
995
861
fprintf(stderr, "Avahi: Failed to resolve service '%s': %s\n",
996
862
name, avahi_strerror(avahi_server_errno(mc.server)));
997
863
break;
1008
874
}
1009
875
}
1010
876
877
sig_atomic_t quit_now = 0;
878
1011
879
/* stop main loop after sigterm has been called */
1012
static void handle_sigterm(int sig){
880
static void handle_sigterm(__attribute__((unused)) int sig){
1013
881
if(quit_now){
1014
882
return;
1015
883
}
1016
884
quit_now = 1;
1017
signal_received = sig;
1018
885
int old_errno = errno;
1019
886
if(mc.simple_poll != NULL){
1020
887
avahi_simple_poll_quit(mc.simple_poll);
1022
889
errno = old_errno;
1023
890
}
1024
891
1025
/*
1026
* This function determines if a directory entry in /sys/class/net
1027
* corresponds to an acceptable network device.
1028
* (This function is passed to scandir(3) as a filter function.)
1029
*/
1030
int good_interface(const struct dirent *if_entry){
1031
ssize_t ssret;
1032
char *flagname = NULL;
1033
int ret = asprintf(&flagname, "%s/%s/flags", sys_class_net,
1034
if_entry->d_name);
1035
if(ret < 0){
1036
perror("asprintf");
1037
return 0;
1038
}
1039
if(if_entry->d_name[0] == '.'){
1040
return 0;
1041
}
1042
int flags_fd = (int)TEMP_FAILURE_RETRY(open(flagname, O_RDONLY));
1043
if(flags_fd == -1){
1044
perror("open");
1045
return 0;
1046
}
1047
typedef short ifreq_flags; /* ifreq.ifr_flags in netdevice(7) */
1048
/* read line from flags_fd */
1049
ssize_t to_read = (sizeof(ifreq_flags)*2)+3; /* "0x1003\n" */
1050
char *flagstring = malloc((size_t)to_read+1); /* +1 for final \0 */
1051
flagstring[(size_t)to_read] = '\0';
1052
if(flagstring == NULL){
1053
perror("malloc");
1054
close(flags_fd);
1055
return 0;
1056
}
1057
while(to_read > 0){
1058
ssret = (ssize_t)TEMP_FAILURE_RETRY(read(flags_fd, flagstring,
1059
(size_t)to_read));
1060
if(ssret == -1){
1061
perror("read");
1062
free(flagstring);
1063
close(flags_fd);
1064
return 0;
1065
}
1066
to_read -= ssret;
1067
if(ssret == 0){
1068
break;
1069
}
1070
}
1071
close(flags_fd);
1072
intmax_t tmpmax;
1073
char *tmp;
1074
errno = 0;
1075
tmpmax = strtoimax(flagstring, &tmp, 0);
1076
if(errno != 0 or tmp == flagstring or (*tmp != '\0'
1077
and not (isspace(*tmp)))
1078
or tmpmax != (ifreq_flags)tmpmax){
1079
if(debug){
1080
fprintf(stderr, "Invalid flags \"%s\" for interface \"%s\"\n",
1081
flagstring, if_entry->d_name);
1082
}
1083
free(flagstring);
1084
return 0;
1085
}
1086
free(flagstring);
1087
ifreq_flags flags = (ifreq_flags)tmpmax;
1088
/* Reject the loopback device */
1089
if(flags & IFF_LOOPBACK){
1090
if(debug){
1091
fprintf(stderr, "Rejecting loopback interface \"%s\"\n",
1092
if_entry->d_name);
1093
}
1094
return 0;
1095
}
1096
/* Accept point-to-point devices only if connect_to is specified */
1097
if(connect_to != NULL and (flags & IFF_POINTOPOINT)){
1098
if(debug){
1099
fprintf(stderr, "Accepting point-to-point interface \"%s\"\n",
1100
if_entry->d_name);
1101
}
1102
return 1;
1103
}
1104
/* Otherwise, reject non-broadcast-capable devices */
1105
if(not (flags & IFF_BROADCAST)){
1106
if(debug){
1107
fprintf(stderr, "Rejecting non-broadcast interface \"%s\"\n",
1108
if_entry->d_name);
1109
}
1110
return 0;
1111
}
1112
/* Accept this device */
1113
if(debug){
1114
fprintf(stderr, "Interface \"%s\" is acceptable\n",
1115
if_entry->d_name);
1116
}
1117
return 1;
1118
}
1119
1120
892
int main(int argc, char *argv[]){
1121
893
AvahiSServiceBrowser *sb = NULL;
1122
894
int error;
1124
896
intmax_t tmpmax;
1125
897
char *tmp;
1126
898
int exitcode = EXIT_SUCCESS;
1127
const char *interface = "";
899
const char *interface = "eth0";
1128
900
struct ifreq network;
1129
int sd = -1;
1130
bool take_down_interface = false;
901
int sd;
1131
902
uid_t uid;
1132
903
gid_t gid;
904
char *connect_to = NULL;
1133
905
char tempdir[] = "/tmp/mandosXXXXXX";
1134
906
bool tempdir_created = false;
1135
907
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
1136
908
const char *seckey = PATHDIR "/" SECKEY;
1137
909
const char *pubkey = PATHDIR "/" PUBKEY;
1138
910
911
/* Initialize Mandos context */
912
mc = (mandos_context){ .simple_poll = NULL, .server = NULL,
913
.dh_bits = 1024, .priority = "SECURE256"
914
":!CTYPE-X.509:+CTYPE-OPENPGP" };
1139
915
bool gnutls_initialized = false;
1140
916
bool gpgme_initialized = false;
1141
917
float delay = 2.5f;
1142
918
1143
struct sigaction old_sigterm_action = { .sa_handler = SIG_DFL };
919
struct sigaction old_sigterm_action;
1144
920
struct sigaction sigterm_action = { .sa_handler = handle_sigterm };
1145
921
1146
uid = getuid();
1147
gid = getgid();
1148
1149
/* Lower any group privileges we might have, just to be safe */
1150
errno = 0;
1151
ret = setgid(gid);
1152
if(ret == -1){
1153
perror("setgid");
1154
}
1155
1156
/* Lower user privileges (temporarily) */
1157
errno = 0;
1158
ret = seteuid(uid);
1159
if(ret == -1){
1160
perror("seteuid");
1161
}
1162
1163
if(quit_now){
1164
goto end;
1165
}
1166
1167
922
{
1168
923
struct argp_option options[] = {
1169
924
{ .name = "debug", .key = 128,
1198
953
.arg = "SECONDS",
1199
954
.doc = "Maximum delay to wait for interface startup",
1200
955
.group = 2 },
1201
/*
1202
* These reproduce what we would get without ARGP_NO_HELP
1203
*/
1204
{ .name = "help", .key = '?',
1205
.doc = "Give this help list", .group = -1 },
1206
{ .name = "usage", .key = -3,
1207
.doc = "Give a short usage message", .group = -1 },
1208
{ .name = "version", .key = 'V',
1209
.doc = "Print program version", .group = -1 },
1210
956
{ .name = NULL }
1211
957
};
1212
958
1213
959
error_t parse_opt(int key, char *arg,
1214
960
struct argp_state *state){
1215
errno = 0;
1216
961
switch(key){
1217
962
case 128: /* --debug */
1218
963
debug = true;
1234
979
tmpmax = strtoimax(arg, &tmp, 10);
1235
980
if(errno != 0 or tmp == arg or *tmp != '\0'
1236
981
or tmpmax != (typeof(mc.dh_bits))tmpmax){
1237
argp_error(state, "Bad number of DH bits");
982
fprintf(stderr, "Bad number of DH bits\n");
983
exit(EXIT_FAILURE);
1238
984
}
1239
985
mc.dh_bits = (typeof(mc.dh_bits))tmpmax;
1240
986
break;
1245
991
errno = 0;
1246
992
delay = strtof(arg, &tmp);
1247
993
if(errno != 0 or tmp == arg or *tmp != '\0'){
1248
argp_error(state, "Bad delay");
994
fprintf(stderr, "Bad delay\n");
995
exit(EXIT_FAILURE);
1249
996
}
1250
997
break;
1251
/*
1252
* These reproduce what we would get without ARGP_NO_HELP
1253
*/
1254
case '?': /* --help */
1255
argp_state_help(state, state->out_stream,
1256
(ARGP_HELP_STD_HELP | ARGP_HELP_EXIT_ERR)
1257
& ~(unsigned int)ARGP_HELP_EXIT_OK);
1258
case -3: /* --usage */
1259
argp_state_help(state, state->out_stream,
1260
ARGP_HELP_USAGE | ARGP_HELP_EXIT_ERR);
1261
case 'V': /* --version */
1262
fprintf(state->out_stream, "%s\n", argp_program_version);
1263
exit(argp_err_exit_status);
998
case ARGP_KEY_ARG:
999
argp_usage(state);
1000
case ARGP_KEY_END:
1264
1001
break;
1265
1002
default:
1266
1003
return ARGP_ERR_UNKNOWN;
1267
1004
}
1268
return errno;
1005
return 0;
1269
1006
}
1270
1007
1271
1008
struct argp argp = { .options = options, .parser = parse_opt,
1272
1009
.args_doc = "",
1273
1010
.doc = "Mandos client -- Get and decrypt"
1274
1011
" passwords from a Mandos server" };
1275
ret = argp_parse(&argp, argc, argv,
1276
ARGP_IN_ORDER | ARGP_NO_HELP, 0, NULL);
1277
switch(ret){
1278
case 0:
1279
break;
1280
case ENOMEM:
1281
default:
1282
errno = ret;
1283
perror("argp_parse");
1284
exitcode = EX_OSERR;
1285
goto end;
1286
case EINVAL:
1287
exitcode = EX_USAGE;
1012
ret = argp_parse(&argp, argc, argv, 0, 0, NULL);
1013
if(ret == ARGP_ERR_UNKNOWN){
1014
fprintf(stderr, "Unknown error while parsing arguments\n");
1015
exitcode = EXIT_FAILURE;
1288
1016
goto end;
1289
1017
}
1290
1018
}
1292
1020
if(not debug){
1293
1021
avahi_set_log_function(empty_log);
1294
1022
}
1295
1296
if(interface[0] == '\0'){
1297
struct dirent **direntries;
1298
ret = scandir(sys_class_net, &direntries, good_interface,
1299
alphasort);
1300
if(ret >= 1){
1301
/* Pick the first good interface */
1302
interface = strdup(direntries[0]->d_name);
1303
if(debug){
1304
fprintf(stderr, "Using interface \"%s\"\n", interface);
1305
}
1306
if(interface == NULL){
1307
perror("malloc");
1308
free(direntries);
1309
exitcode = EXIT_FAILURE;
1310
goto end;
1311
}
1312
free(direntries);
1313
} else {
1314
free(direntries);
1315
fprintf(stderr, "Could not find a network interface\n");
1316
exitcode = EXIT_FAILURE;
1317
goto end;
1318
}
1319
}
1320
1023
1321
1024
/* Initialize Avahi early so avahi_simple_poll_quit() can be called
1322
1025
from the signal handler */
1325
1028
mc.simple_poll = avahi_simple_poll_new();
1326
1029
if(mc.simple_poll == NULL){
1327
1030
fprintf(stderr, "Avahi: Failed to create simple poll object.\n");
1328
exitcode = EX_UNAVAILABLE;
1031
exitcode = EXIT_FAILURE;
1329
1032
goto end;
1330
1033
}
1331
1034
1333
1036
ret = sigaddset(&sigterm_action.sa_mask, SIGINT);
1334
1037
if(ret == -1){
1335
1038
perror("sigaddset");
1336
exitcode = EX_OSERR;
1039
exitcode = EXIT_FAILURE;
1337
1040
goto end;
1338
1041
}
1339
1042
ret = sigaddset(&sigterm_action.sa_mask, SIGHUP);
1340
1043
if(ret == -1){
1341
1044
perror("sigaddset");
1342
exitcode = EX_OSERR;
1045
exitcode = EXIT_FAILURE;
1343
1046
goto end;
1344
1047
}
1345
1048
ret = sigaddset(&sigterm_action.sa_mask, SIGTERM);
1346
1049
if(ret == -1){
1347
1050
perror("sigaddset");
1348
exitcode = EX_OSERR;
1349
goto end;
1350
}
1351
/* Need to check if the handler is SIG_IGN before handling:
1352
| [[info:libc:Initial Signal Actions]] |
1353
| [[info:libc:Basic Signal Handling]] |
1354
*/
1355
ret = sigaction(SIGINT, NULL, &old_sigterm_action);
1356
if(ret == -1){
1357
perror("sigaction");
1358
return EX_OSERR;
1359
}
1360
if(old_sigterm_action.sa_handler != SIG_IGN){
1361
ret = sigaction(SIGINT, &sigterm_action, NULL);
1362
if(ret == -1){
1363
perror("sigaction");
1364
exitcode = EX_OSERR;
1365
goto end;
1366
}
1367
}
1368
ret = sigaction(SIGHUP, NULL, &old_sigterm_action);
1369
if(ret == -1){
1370
perror("sigaction");
1371
return EX_OSERR;
1372
}
1373
if(old_sigterm_action.sa_handler != SIG_IGN){
1374
ret = sigaction(SIGHUP, &sigterm_action, NULL);
1375
if(ret == -1){
1376
perror("sigaction");
1377
exitcode = EX_OSERR;
1378
goto end;
1379
}
1380
}
1381
ret = sigaction(SIGTERM, NULL, &old_sigterm_action);
1382
if(ret == -1){
1383
perror("sigaction");
1384
return EX_OSERR;
1385
}
1386
if(old_sigterm_action.sa_handler != SIG_IGN){
1387
ret = sigaction(SIGTERM, &sigterm_action, NULL);
1388
if(ret == -1){
1389
perror("sigaction");
1390
exitcode = EX_OSERR;
1391
goto end;
1392
}
1393
}
1051
exitcode = EXIT_FAILURE;
1052
goto end;
1053
}
1054
ret = sigaction(SIGTERM, &sigterm_action, &old_sigterm_action);
1055
if(ret == -1){
1056
perror("sigaction");
1057
exitcode = EXIT_FAILURE;
1058
goto end;
1059
}
1394
1060
1395
1061
/* If the interface is down, bring it up */
1396
if(strcmp(interface, "none") != 0){
1397
if_index = (AvahiIfIndex) if_nametoindex(interface);
1398
if(if_index == 0){
1399
fprintf(stderr, "No such interface: \"%s\"\n", interface);
1400
exitcode = EX_UNAVAILABLE;
1401
goto end;
1402
}
1403
1404
if(quit_now){
1405
goto end;
1406
}
1407
1408
/* Re-raise priviliges */
1409
errno = 0;
1410
ret = seteuid(0);
1411
if(ret == -1){
1412
perror("seteuid");
1413
}
1414
1062
if(interface[0] != '\0'){
1415
1063
#ifdef __linux__
1416
1064
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1417
messages about the network interface to mess up the prompt */
1065
messages to mess up the prompt */
1418
1066
ret = klogctl(8, NULL, 5);
1419
1067
bool restore_loglevel = true;
1420
1068
if(ret == -1){
1426
1074
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1427
1075
if(sd < 0){
1428
1076
perror("socket");
1429
exitcode = EX_OSERR;
1077
exitcode = EXIT_FAILURE;
1430
1078
#ifdef __linux__
1431
1079
if(restore_loglevel){
1432
1080
ret = klogctl(7, NULL, 0);
1435
1083
}
1436
1084
}
1437
1085
#endif /* __linux__ */
1438
/* Lower privileges */
1439
errno = 0;
1440
ret = seteuid(uid);
1441
if(ret == -1){
1442
perror("seteuid");
1443
}
1444
1086
goto end;
1445
1087
}
1446
1088
strcpy(network.ifr_name, interface);
1455
1097
}
1456
1098
}
1457
1099
#endif /* __linux__ */
1458
exitcode = EX_OSERR;
1459
/* Lower privileges */
1460
errno = 0;
1461
ret = seteuid(uid);
1462
if(ret == -1){
1463
perror("seteuid");
1464
}
1100
exitcode = EXIT_FAILURE;
1465
1101
goto end;
1466
1102
}
1467
1103
if((network.ifr_flags & IFF_UP) == 0){
1468
1104
network.ifr_flags |= IFF_UP;
1469
take_down_interface = true;
1470
1105
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1471
1106
if(ret == -1){
1472
take_down_interface = false;
1473
perror("ioctl SIOCSIFFLAGS +IFF_UP");
1474
exitcode = EX_OSERR;
1107
perror("ioctl SIOCSIFFLAGS");
1108
exitcode = EXIT_FAILURE;
1475
1109
#ifdef __linux__
1476
1110
if(restore_loglevel){
1477
1111
ret = klogctl(7, NULL, 0);
1480
1114
}
1481
1115
}
1482
1116
#endif /* __linux__ */
1483
/* Lower privileges */
1484
errno = 0;
1485
ret = seteuid(uid);
1486
if(ret == -1){
1487
perror("seteuid");
1488
}
1489
1117
goto end;
1490
1118
}
1491
1119
}
1503
1131
perror("nanosleep");
1504
1132
}
1505
1133
}
1506
if(not take_down_interface){
1507
/* We won't need the socket anymore */
1508
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1509
if(ret == -1){
1510
perror("close");
1511
}
1134
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1135
if(ret == -1){
1136
perror("close");
1512
1137
}
1513
1138
#ifdef __linux__
1514
1139
if(restore_loglevel){
1519
1144
}
1520
1145
}
1521
1146
#endif /* __linux__ */
1522
/* Lower privileges */
1523
errno = 0;
1524
if(take_down_interface){
1525
/* Lower privileges */
1526
ret = seteuid(uid);
1527
if(ret == -1){
1528
perror("seteuid");
1529
}
1530
} else {
1531
/* Lower privileges permanently */
1532
ret = setuid(uid);
1533
if(ret == -1){
1534
perror("setuid");
1535
}
1536
}
1537
}
1538
1539
if(quit_now){
1540
goto end;
1147
}
1148
1149
uid = getuid();
1150
gid = getgid();
1151
1152
errno = 0;
1153
setgid(gid);
1154
if(ret == -1){
1155
perror("setgid");
1156
}
1157
1158
ret = setuid(uid);
1159
if(ret == -1){
1160
perror("setuid");
1541
1161
}
1542
1162
1543
1163
ret = init_gnutls_global(pubkey, seckey);
1544
1164
if(ret == -1){
1545
1165
fprintf(stderr, "init_gnutls_global failed\n");
1546
exitcode = EX_UNAVAILABLE;
1166
exitcode = EXIT_FAILURE;
1547
1167
goto end;
1548
1168
} else {
1549
1169
gnutls_initialized = true;
1550
1170
}
1551
1171
1552
if(quit_now){
1553
goto end;
1554
}
1555
1556
tempdir_created = true;
1557
1172
if(mkdtemp(tempdir) == NULL){
1558
tempdir_created = false;
1559
1173
perror("mkdtemp");
1560
1174
goto end;
1561
1175
}
1562
1563
if(quit_now){
1564
goto end;
1565
}
1176
tempdir_created = true;
1566
1177
1567
1178
if(not init_gpgme(pubkey, seckey, tempdir)){
1568
1179
fprintf(stderr, "init_gpgme failed\n");
1569
exitcode = EX_UNAVAILABLE;
1180
exitcode = EXIT_FAILURE;
1570
1181
goto end;
1571
1182
} else {
1572
1183
gpgme_initialized = true;
1573
1184
}
1574
1185
1575
if(quit_now){
1576
goto end;
1186
if(interface[0] != '\0'){
1187
if_index = (AvahiIfIndex) if_nametoindex(interface);
1188
if(if_index == 0){
1189
fprintf(stderr, "No such interface: \"%s\"\n", interface);
1190
exitcode = EXIT_FAILURE;
1191
goto end;
1192
}
1577
1193
}
1578
1194
1579
1195
if(connect_to != NULL){
1582
1198
char *address = strrchr(connect_to, ':');
1583
1199
if(address == NULL){
1584
1200
fprintf(stderr, "No colon in address\n");
1585
exitcode = EX_USAGE;
1586
goto end;
1587
}
1588
1589
if(quit_now){
1590
goto end;
1591
}
1592
1201
exitcode = EXIT_FAILURE;
1202
goto end;
1203
}
1593
1204
uint16_t port;
1594
1205
errno = 0;
1595
1206
tmpmax = strtoimax(address+1, &tmp, 10);
1596
1207
if(errno != 0 or tmp == address+1 or *tmp != '\0'
1597
1208
or tmpmax != (uint16_t)tmpmax){
1598
1209
fprintf(stderr, "Bad port number\n");
1599
exitcode = EX_USAGE;
1600
goto end;
1601
}
1602
1603
if(quit_now){
1604
goto end;
1605
}
1606
1210
exitcode = EXIT_FAILURE;
1211
goto end;
1212
}
1607
1213
port = (uint16_t)tmpmax;
1608
1214
*address = '\0';
1609
1215
address = connect_to;
1614
1220
} else {
1615
1221
af = AF_INET;
1616
1222
}
1617
1618
if(quit_now){
1619
goto end;
1620
}
1621
1622
1223
ret = start_mandos_communication(address, port, if_index, af);
1623
1224
if(ret < 0){
1624
switch(errno){
1625
case ENETUNREACH:
1626
case EHOSTDOWN:
1627
case EHOSTUNREACH:
1628
exitcode = EX_NOHOST;
1629
break;
1630
case EINVAL:
1631
exitcode = EX_USAGE;
1632
break;
1633
case EIO:
1634
exitcode = EX_IOERR;
1635
break;
1636
case EPROTO:
1637
exitcode = EX_PROTOCOL;
1638
break;
1639
default:
1640
exitcode = EX_OSERR;
1641
break;
1642
}
1225
exitcode = EXIT_FAILURE;
1643
1226
} else {
1644
1227
exitcode = EXIT_SUCCESS;
1645
1228
}
1646
1229
goto end;
1647
1230
}
1648
1649
if(quit_now){
1650
goto end;
1651
}
1652
1231
1653
1232
{
1654
1233
AvahiServerConfig config;
1655
1234
/* Do not publish any local Zeroconf records */
1672
1251
if(mc.server == NULL){
1673
1252
fprintf(stderr, "Failed to create Avahi server: %s\n",
1674
1253
avahi_strerror(error));
1675
exitcode = EX_UNAVAILABLE;
1676
goto end;
1677
}
1678
1679
if(quit_now){
1254
exitcode = EXIT_FAILURE;
1680
1255
goto end;
1681
1256
}
1682
1257
1683
1258
/* Create the Avahi service browser */
1684
1259
sb = avahi_s_service_browser_new(mc.server, if_index,
1685
AVAHI_PROTO_UNSPEC, "_mandos._tcp",
1260
AVAHI_PROTO_INET6, "_mandos._tcp",
1686
1261
NULL, 0, browse_callback, NULL);
1687
1262
if(sb == NULL){
1688
1263
fprintf(stderr, "Failed to create service browser: %s\n",
1689
1264
avahi_strerror(avahi_server_errno(mc.server)));
1690
exitcode = EX_UNAVAILABLE;
1691
goto end;
1692
}
1693
1694
if(quit_now){
1265
exitcode = EXIT_FAILURE;
1695
1266
goto end;
1696
1267
}
1697
1268
1729
1300
gpgme_release(mc.ctx);
1730
1301
}
1731
1302
1732
/* Take down the network interface */
1733
if(take_down_interface){
1734
/* Re-raise priviliges */
1735
errno = 0;
1736
ret = seteuid(0);
1737
if(ret == -1){
1738
perror("seteuid");
1739
}
1740
if(geteuid() == 0){
1741
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1742
if(ret == -1){
1743
perror("ioctl SIOCGIFFLAGS");
1744
} else if(network.ifr_flags & IFF_UP) {
1745
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
1746
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1747
if(ret == -1){
1748
perror("ioctl SIOCSIFFLAGS -IFF_UP");
1749
}
1750
}
1751
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1752
if(ret == -1){
1753
perror("close");
1754
}
1755
/* Lower privileges permanently */
1756
errno = 0;
1757
ret = setuid(uid);
1758
if(ret == -1){
1759
perror("setuid");
1760
}
1761
}
1762
}
1763
1764
1303
/* Removes the temp directory used by GPGME */
1765
1304
if(tempdir_created){
1766
1305
DIR *d;
1805
1344
}
1806
1345
}
1807
1346
1808
if(quit_now){
1809
sigemptyset(&old_sigterm_action.sa_mask);
1810
old_sigterm_action.sa_handler = SIG_DFL;
1811
ret = (int)TEMP_FAILURE_RETRY(sigaction(signal_received,
1812
&old_sigterm_action,
1813
NULL));
1814
if(ret == -1){
1815
perror("sigaction");
1816
}
1817
do {
1818
ret = raise(signal_received);
1819
} while(ret != 0 and errno == EINTR);
1820
if(ret != 0){
1821
perror("raise");
1822
abort();
1823
}
1824
TEMP_FAILURE_RETRY(pause());
1825
}
1826
1827
1347
return exitcode;
1828
1348
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0