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- Committer: Teddy Hogeborn
- Date: 2008-08-24 23:18:18 UTC
- Revision ID: teddy@fukt.bsnet.se-20080824231818-4cgr5zekodg4s0dl
* initramfs-tools-hook: Added "--enable-dsa2" and "--trust-model
always" options to gpg.
always" options to gpg.
- files removed:
- .bzrignore
- files modified:
- Makefile
added
removed
plugins.d/password-request.c
47
47
#include <sys/types.h> /* socket(), inet_pton(), sockaddr,
48
48
sockaddr_in6, PF_INET6,
49
49
SOCK_STREAM, INET6_ADDRSTRLEN,
50
uid_t, gid_t, open(), opendir(), DIR */
51
#include <sys/stat.h> /* open() */
50
uid_t, gid_t */
51
#include <inttypes.h> /* PRIu16 */
52
52
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
53
53
struct in6_addr, inet_pton(),
54
54
connect() */
55
#include <fcntl.h> /* open() */
56
#include <dirent.h> /* opendir(), struct dirent, readdir() */
57
#include <inttypes.h> /* PRIu16 */
58
55
#include <assert.h> /* assert() */
59
56
#include <errno.h> /* perror(), errno */
60
57
#include <time.h> /* time() */
61
58
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
62
59
SIOCSIFFLAGS, if_indextoname(),
63
60
if_nametoindex(), IF_NAMESIZE */
64
#include <netinet/in.h>
65
61
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
66
62
getuid(), getgid(), setuid(),
67
63
setgid() */
64
#include <netinet/in.h>
68
65
#include <arpa/inet.h> /* inet_pton(), htons */
69
66
#include <iso646.h> /* not, and */
70
67
#include <argp.h> /* struct argp_option, error_t, struct
101
98
102
99
#define BUFFER_SIZE 256
103
100
104
/*
105
#define PATHDIR "/conf/conf.d/mandos"
106
*/
107
108
#define PATHDIR "/conf/conf.d/mandos"
109
#define SECKEY "seckey.txt"
110
#define PUBKEY "pupkey.txt"
111
112
101
bool debug = false;
102
static const char *keydir = "/conf/conf.d/mandos";
113
103
static const char mandos_protocol_version[] = "1";
114
104
const char *argp_program_version = "password-request 1.0";
115
105
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
122
112
unsigned int dh_bits;
123
113
gnutls_dh_params_t dh_params;
124
114
const char *priority;
125
gpgme_ctx_t ctx;
126
115
} mandos_context;
127
116
128
117
/*
143
132
}
144
133
145
134
/*
146
* Initialize GPGME.
135
* Decrypt OpenPGP data using keyrings in HOMEDIR.
136
* Returns -1 on error
147
137
*/
148
static bool init_gpgme(mandos_context *mc, const char *seckey,
149
const char *pubkey, const char *tempdir){
150
int ret;
138
static ssize_t pgp_packet_decrypt (const char *cryptotext,
139
size_t crypto_size,
140
char **plaintext,
141
const char *homedir){
142
gpgme_data_t dh_crypto, dh_plain;
143
gpgme_ctx_t ctx;
151
144
gpgme_error_t rc;
145
ssize_t ret;
146
size_t plaintext_capacity = 0;
147
ssize_t plaintext_length = 0;
152
148
gpgme_engine_info_t engine_info;
153
154
155
/*
156
* Helper function to insert pub and seckey to the enigne keyring.
157
*/
158
bool import_key(const char *filename){
159
int fd;
160
gpgme_data_t pgp_data;
161
162
fd = TEMP_FAILURE_RETRY(open(filename, O_RDONLY));
163
if(fd == -1){
164
perror("open");
165
return false;
166
}
167
168
rc = gpgme_data_new_from_fd(&pgp_data, fd);
169
if (rc != GPG_ERR_NO_ERROR){
170
fprintf(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
171
gpgme_strsource(rc), gpgme_strerror(rc));
172
return false;
173
}
174
175
rc = gpgme_op_import(mc->ctx, pgp_data);
176
if (rc != GPG_ERR_NO_ERROR){
177
fprintf(stderr, "bad gpgme_op_import: %s: %s\n",
178
gpgme_strsource(rc), gpgme_strerror(rc));
179
return false;
180
}
181
182
ret = TEMP_FAILURE_RETRY(close(fd));
183
if(ret == -1){
184
perror("close");
185
}
186
gpgme_data_release(pgp_data);
187
return true;
188
}
189
149
190
150
if (debug){
191
fprintf(stderr, "Initialize gpgme\n");
151
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
192
152
}
193
153
194
154
/* Init GPGME */
195
155
gpgme_check_version(NULL);
196
156
rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
197
157
if (rc != GPG_ERR_NO_ERROR){
198
158
fprintf(stderr, "bad gpgme_engine_check_version: %s: %s\n",
199
159
gpgme_strsource(rc), gpgme_strerror(rc));
200
return false;
160
return -1;
201
161
}
202
203
/* Set GPGME home directory for the OpenPGP engine only */
162
163
/* Set GPGME home directory for the OpenPGP engine only */
204
164
rc = gpgme_get_engine_info (&engine_info);
205
165
if (rc != GPG_ERR_NO_ERROR){
206
166
fprintf(stderr, "bad gpgme_get_engine_info: %s: %s\n",
207
167
gpgme_strsource(rc), gpgme_strerror(rc));
208
return false;
168
return -1;
209
169
}
210
170
while(engine_info != NULL){
211
171
if(engine_info->protocol == GPGME_PROTOCOL_OpenPGP){
212
172
gpgme_set_engine_info(GPGME_PROTOCOL_OpenPGP,
213
engine_info->file_name, tempdir);
173
engine_info->file_name, homedir);
214
174
break;
215
175
}
216
176
engine_info = engine_info->next;
217
177
}
218
178
if(engine_info == NULL){
219
fprintf(stderr, "Could not set GPGME home dir to %s\n", tempdir);
220
return false;
221
}
222
223
/* Create new GPGME "context" */
224
rc = gpgme_new(&(mc->ctx));
225
if (rc != GPG_ERR_NO_ERROR){
226
fprintf(stderr, "bad gpgme_new: %s: %s\n",
227
gpgme_strsource(rc), gpgme_strerror(rc));
228
return false;
229
}
230
231
if (not import_key(pubkey) or not import_key(seckey)){
232
return false;
233
}
234
235
return true;
236
}
237
238
/*
239
* Decrypt OpenPGP data.
240
* Returns -1 on error
241
*/
242
static ssize_t pgp_packet_decrypt (const mandos_context *mc,
243
const char *cryptotext,
244
size_t crypto_size,
245
char **plaintext){
246
gpgme_data_t dh_crypto, dh_plain;
247
gpgme_error_t rc;
248
ssize_t ret;
249
size_t plaintext_capacity = 0;
250
ssize_t plaintext_length = 0;
251
252
if (debug){
253
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
179
fprintf(stderr, "Could not set GPGME home dir to %s\n", homedir);
180
return -1;
254
181
}
255
182
256
183
/* Create new GPGME data buffer from memory cryptotext */
271
198
return -1;
272
199
}
273
200
201
/* Create new GPGME "context" */
202
rc = gpgme_new(&ctx);
203
if (rc != GPG_ERR_NO_ERROR){
204
fprintf(stderr, "bad gpgme_new: %s: %s\n",
205
gpgme_strsource(rc), gpgme_strerror(rc));
206
plaintext_length = -1;
207
goto decrypt_end;
208
}
209
274
210
/* Decrypt data from the cryptotext data buffer to the plaintext
275
211
data buffer */
276
rc = gpgme_op_decrypt(mc->ctx, dh_crypto, dh_plain);
212
rc = gpgme_op_decrypt(ctx, dh_crypto, dh_plain);
277
213
if (rc != GPG_ERR_NO_ERROR){
278
214
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
279
215
gpgme_strsource(rc), gpgme_strerror(rc));
280
216
plaintext_length = -1;
281
217
if (debug){
282
218
gpgme_decrypt_result_t result;
283
result = gpgme_op_decrypt_result(mc->ctx);
219
result = gpgme_op_decrypt_result(ctx);
284
220
if (result == NULL){
285
221
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
286
222
} else {
345
281
}
346
282
plaintext_length += ret;
347
283
}
348
284
349
285
if(debug){
350
286
fprintf(stderr, "Decrypted password is: ");
351
287
for(ssize_t i = 0; i < plaintext_length; i++){
412
348
}
413
349
414
350
if(debug){
415
fprintf(stderr, "Attempting to use OpenPGP public key %s and"
416
" secret key %s as GnuTLS credentials\n", pubkeyfilename,
351
fprintf(stderr, "Attempting to use OpenPGP certificate %s"
352
" and keyfile %s as GnuTLS credentials\n", pubkeyfilename,
417
353
seckeyfilename);
418
354
}
419
355
424
360
fprintf(stderr,
425
361
"Error[%d] while reading the OpenPGP key pair ('%s',"
426
362
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
427
fprintf(stderr, "The GnuTLS error is: %s\n",
363
fprintf(stdout, "The GnuTLS error is: %s\n",
428
364
safer_gnutls_strerror(ret));
429
365
goto globalfail;
430
366
}
444
380
}
445
381
446
382
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
447
383
448
384
return 0;
449
385
450
386
globalfail:
451
387
452
388
gnutls_certificate_free_credentials(mc->cred);
453
389
gnutls_global_deinit();
454
390
return -1;
391
455
392
}
456
393
457
394
static int init_gnutls_session(mandos_context *mc,
529
466
perror("socket");
530
467
return -1;
531
468
}
532
469
533
470
if(debug){
534
471
if(if_indextoname((unsigned int)if_index, interface) == NULL){
535
472
perror("if_indextoname");
574
511
perror("connect");
575
512
return -1;
576
513
}
577
514
578
515
const char *out = mandos_protocol_version;
579
516
written = 0;
580
517
while (true){
598
535
}
599
536
}
600
537
}
601
538
602
539
if(debug){
603
540
fprintf(stderr, "Establishing TLS session with %s\n", ip);
604
541
}
605
542
606
543
gnutls_transport_set_ptr (session, (gnutls_transport_ptr_t) tcp_sd);
607
544
608
545
do{
609
546
ret = gnutls_handshake (session);
610
547
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
624
561
fprintf(stderr, "Retrieving pgp encrypted password from %s\n",
625
562
ip);
626
563
}
627
564
628
565
while(true){
629
566
buffer_capacity = adjustbuffer(&buffer, buffer_length,
630
567
buffer_capacity);
674
611
gnutls_bye (session, GNUTLS_SHUT_RDWR);
675
612
676
613
if (buffer_length > 0){
677
decrypted_buffer_size = pgp_packet_decrypt(mc, buffer,
614
decrypted_buffer_size = pgp_packet_decrypt(buffer,
678
615
buffer_length,
679
&decrypted_buffer);
616
&decrypted_buffer,
617
keydir);
680
618
if (decrypted_buffer_size >= 0){
681
619
written = 0;
682
620
while(written < (size_t) decrypted_buffer_size){
705
643
706
644
mandos_end:
707
645
free(buffer);
708
ret = TEMP_FAILURE_RETRY(close(tcp_sd));
709
if(ret == -1){
710
perror("close");
711
}
646
close(tcp_sd);
712
647
gnutls_deinit (session);
713
648
return retval;
714
649
}
810
745
}
811
746
}
812
747
748
/* Combines file name and path and returns the malloced new
749
string. some sane checks could/should be added */
750
static char *combinepath(const char *first, const char *second){
751
char *tmp;
752
int ret = asprintf(&tmp, "%s/%s", first, second);
753
if(ret < 0){
754
return NULL;
755
}
756
return tmp;
757
}
758
759
813
760
int main(int argc, char *argv[]){
814
761
AvahiSServiceBrowser *sb = NULL;
815
762
int error;
821
768
uid_t uid;
822
769
gid_t gid;
823
770
char *connect_to = NULL;
824
char tempdir[] = "/tmp/mandosXXXXXX";
825
771
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
826
const char *seckey = PATHDIR "/" SECKEY;
827
const char *pubkey = PATHDIR "/" PUBKEY;
828
772
char *pubkeyfilename = NULL;
773
char *seckeyfilename = NULL;
774
const char *pubkeyname = "pubkey.txt";
775
const char *seckeyname = "seckey.txt";
829
776
mandos_context mc = { .simple_poll = NULL, .server = NULL,
830
.dh_bits = 1024, .priority = "SECURE256"
831
":!CTYPE-X.509:+CTYPE-OPENPGP" };
777
.dh_bits = 1024, .priority = "SECURE256"};
832
778
bool gnutls_initalized = false;
833
bool pgpme_initalized = false;
834
779
835
780
{
836
781
struct argp_option options[] = {
837
782
{ .name = "debug", .key = 128,
838
783
.doc = "Debug mode", .group = 3 },
839
784
{ .name = "connect", .key = 'c',
840
.arg = "ADDRESS:PORT",
841
.doc = "Connect directly to a specific Mandos server",
785
.arg = "IP",
786
.doc = "Connect directly to a sepcified mandos server",
842
787
.group = 1 },
843
788
{ .name = "interface", .key = 'i',
844
.arg = "NAME",
845
.doc = "Interface that will be used to search for Mandos"
846
" servers",
789
.arg = "INTERFACE",
790
.doc = "Interface that Avahi will conntect through",
791
.group = 1 },
792
{ .name = "keydir", .key = 'd',
793
.arg = "KEYDIR",
794
.doc = "Directory where the openpgp keyring is",
847
795
.group = 1 },
848
796
{ .name = "seckey", .key = 's',
849
.arg = "FILE",
850
.doc = "OpenPGP secret key file base name",
797
.arg = "SECKEY",
798
.doc = "Secret openpgp key for gnutls authentication",
851
799
.group = 1 },
852
800
{ .name = "pubkey", .key = 'p',
853
.arg = "FILE",
854
.doc = "OpenPGP public key file base name",
801
.arg = "PUBKEY",
802
.doc = "Public openpgp key for gnutls authentication",
855
803
.group = 2 },
856
804
{ .name = "dh-bits", .key = 129,
857
805
.arg = "BITS",
858
.doc = "Bit length of the prime number used in the"
859
" Diffie-Hellman key exchange",
806
.doc = "dh-bits to use in gnutls communication",
860
807
.group = 2 },
861
808
{ .name = "priority", .key = 130,
862
.arg = "STRING",
863
.doc = "GnuTLS priority string for the TLS handshake",
864
.group = 1 },
809
.arg = "PRIORITY",
810
.doc = "GNUTLS priority", .group = 1 },
865
811
{ .name = NULL }
866
812
};
813
867
814
868
815
error_t parse_opt (int key, char *arg,
869
816
struct argp_state *state) {
870
817
/* Get the INPUT argument from `argp_parse', which we know is
871
818
a pointer to our plugin list pointer. */
872
819
switch (key) {
873
case 128: /* --debug */
820
case 128:
874
821
debug = true;
875
822
break;
876
case 'c': /* --connect */
823
case 'c':
877
824
connect_to = arg;
878
825
break;
879
case 'i': /* --interface */
826
case 'i':
880
827
interface = arg;
881
828
break;
882
case 's': /* --seckey */
883
seckey = arg;
884
break;
885
case 'p': /* --pubkey */
886
pubkey = arg;
887
break;
888
case 129: /* --dh-bits */
829
case 'd':
830
keydir = arg;
831
break;
832
case 's':
833
seckeyname = arg;
834
break;
835
case 'p':
836
pubkeyname = arg;
837
break;
838
case 129:
889
839
errno = 0;
890
840
mc.dh_bits = (unsigned int) strtol(arg, NULL, 10);
891
841
if (errno){
893
843
exit(EXIT_FAILURE);
894
844
}
895
845
break;
896
case 130: /* --priority */
846
case 130:
897
847
mc.priority = arg;
898
848
break;
899
849
case ARGP_KEY_ARG:
905
855
}
906
856
return 0;
907
857
}
908
858
909
859
struct argp argp = { .options = options, .parser = parse_opt,
910
860
.args_doc = "",
911
861
.doc = "Mandos client -- Get and decrypt"
912
" passwords from a Mandos server" };
862
" passwords from mandos server" };
913
863
ret = argp_parse (&argp, argc, argv, 0, 0, NULL);
914
864
if (ret == ARGP_ERR_UNKNOWN){
915
865
fprintf(stderr, "Unknown error while parsing arguments\n");
917
867
goto end;
918
868
}
919
869
}
870
871
pubkeyfilename = combinepath(keydir, pubkeyname);
872
if (pubkeyfilename == NULL){
873
perror("combinepath");
874
exitcode = EXIT_FAILURE;
875
goto end;
876
}
920
877
921
ret = init_gnutls_global(&mc, pubkey, seckey);
878
seckeyfilename = combinepath(keydir, seckeyname);
879
if (seckeyfilename == NULL){
880
perror("combinepath");
881
exitcode = EXIT_FAILURE;
882
goto end;
883
}
884
885
ret = init_gnutls_global(&mc, pubkeyfilename, seckeyfilename);
922
886
if (ret == -1){
923
887
fprintf(stderr, "init_gnutls_global failed\n");
924
888
exitcode = EXIT_FAILURE;
926
890
} else {
927
891
gnutls_initalized = true;
928
892
}
929
930
if(mkdtemp(tempdir) == NULL){
931
perror("mkdtemp");
932
tempdir[0] = '\0';
933
goto end;
934
}
935
936
if(not init_gpgme(&mc, pubkey, seckey, tempdir)){
937
fprintf(stderr, "pgpme_initalized failed\n");
938
exitcode = EXIT_FAILURE;
939
goto end;
940
} else {
941
pgpme_initalized = true;
942
}
943
893
944
894
/* If the interface is down, bring it up */
945
895
{
965
915
goto end;
966
916
}
967
917
}
968
ret = TEMP_FAILURE_RETRY(close(sd));
969
if(ret == -1){
970
perror("close");
971
}
918
close(sd);
972
919
}
973
920
974
921
uid = getuid();
1032
979
exitcode = EXIT_FAILURE;
1033
980
goto end;
1034
981
}
1035
982
1036
983
{
1037
984
AvahiServerConfig config;
1038
985
/* Do not publish any local Zeroconf records */
1041
988
config.publish_addresses = 0;
1042
989
config.publish_workstation = 0;
1043
990
config.publish_domain = 0;
1044
991
1045
992
/* Allocate a new server */
1046
993
mc.server = avahi_server_new(avahi_simple_poll_get
1047
994
(mc.simple_poll), &config, NULL,
1048
995
NULL, &error);
1049
996
1050
997
/* Free the Avahi configuration data */
1051
998
avahi_server_config_free(&config);
1052
999
}
1072
1019
}
1073
1020
1074
1021
/* Run the main loop */
1075
1022
1076
1023
if (debug){
1077
1024
fprintf(stderr, "Starting Avahi loop search\n");
1078
1025
}
1080
1027
avahi_simple_poll_loop(mc.simple_poll);
1081
1028
1082
1029
end:
1083
1030
1084
1031
if (debug){
1085
1032
fprintf(stderr, "%s exiting\n", argv[0]);
1086
1033
}
1091
1038
1092
1039
if (mc.server != NULL)
1093
1040
avahi_server_free(mc.server);
1094
1041
1095
1042
if (mc.simple_poll != NULL)
1096
1043
avahi_simple_poll_free(mc.simple_poll);
1097
1044
free(pubkeyfilename);
1045
free(seckeyfilename);
1046
1098
1047
if (gnutls_initalized){
1099
1048
gnutls_certificate_free_credentials(mc.cred);
1100
1049
gnutls_global_deinit ();
1101
1050
}
1102
1103
if(pgpme_initalized){
1104
gpgme_release(mc.ctx);
1105
}
1106
1107
/* Removes the temp directory used by GPGME */
1108
if(tempdir[0] != '\0'){
1109
DIR *d;
1110
struct dirent *direntry;
1111
d = opendir(tempdir);
1112
if(d == NULL){
1113
perror("opendir");
1114
} else {
1115
while(true){
1116
direntry = readdir(d);
1117
if(direntry == NULL){
1118
break;
1119
}
1120
if (direntry->d_type == DT_REG){
1121
char *fullname = NULL;
1122
ret = asprintf(&fullname, "%s/%s", tempdir,
1123
direntry->d_name);
1124
if(ret < 0){
1125
perror("asprintf");
1126
continue;
1127
}
1128
ret = unlink(fullname);
1129
if(ret == -1){
1130
fprintf(stderr, "unlink(\"%s\"): %s",
1131
fullname, strerror(errno));
1132
}
1133
free(fullname);
1134
}
1135
}
1136
}
1137
ret = rmdir(tempdir);
1138
if(ret == -1){
1139
perror("rmdir");
1140
}
1141
}
1142
1051
1143
1052
return exitcode;
1144
1053
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0