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- Committer: Teddy Hogeborn
- Date: 2009-02-05 02:42:39 UTC
- Revision ID: teddy@fukt.bsnet.se-20090205024239-th0d287ifnl7l3tv
* plugin-runner.c (handle_sigchld): Clarify logic.
- files modified:
- INSTALL
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
42
38
#include <stdio.h> /* fprintf(), stderr, fwrite(),
43
stdout, ferror(), remove() */
39
stdout, ferror(), sscanf(),
40
remove() */
44
41
#include <stdint.h> /* uint16_t, uint32_t */
45
42
#include <stddef.h> /* NULL, size_t, ssize_t */
46
43
#include <stdlib.h> /* free(), EXIT_SUCCESS, EXIT_FAILURE,
47
srand(), strtof(), abort() */
48
#include <stdbool.h> /* bool, false, true */
44
srand() */
45
#include <stdbool.h> /* bool, true */
49
46
#include <string.h> /* memset(), strcmp(), strlen(),
50
47
strerror(), asprintf(), strcpy() */
51
#include <sys/ioctl.h> /* ioctl */
48
#include <sys/ioctl.h> /* ioctl */
52
49
#include <sys/types.h> /* socket(), inet_pton(), sockaddr,
53
50
sockaddr_in6, PF_INET6,
54
SOCK_STREAM, uid_t, gid_t, open(),
55
opendir(), DIR */
51
SOCK_STREAM, INET6_ADDRSTRLEN,
52
uid_t, gid_t, open(), opendir(),
53
DIR */
56
54
#include <sys/stat.h> /* open() */
57
55
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
58
inet_pton(), connect() */
56
struct in6_addr, inet_pton(),
57
connect() */
59
58
#include <fcntl.h> /* open() */
60
59
#include <dirent.h> /* opendir(), struct dirent, readdir()
61
60
*/
62
#include <inttypes.h> /* PRIu16, PRIdMAX, intmax_t,
63
strtoimax() */
61
#include <inttypes.h> /* PRIu16, intmax_t, SCNdMAX */
64
62
#include <assert.h> /* assert() */
65
63
#include <errno.h> /* perror(), errno */
66
64
#include <time.h> /* nanosleep(), time() */
67
65
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
68
66
SIOCSIFFLAGS, if_indextoname(),
69
67
if_nametoindex(), IF_NAMESIZE */
70
#include <netinet/in.h> /* IN6_IS_ADDR_LINKLOCAL,
71
INET_ADDRSTRLEN, INET6_ADDRSTRLEN
72
*/
68
#include <netinet/in.h>
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
#include <iso646.h> /* not, or, and */
73
#include <iso646.h> /* not, and, or */
78
74
#include <argp.h> /* struct argp_option, error_t, struct
79
75
argp_state, struct argp,
80
76
argp_parse(), ARGP_KEY_ARG,
81
77
ARGP_KEY_END, ARGP_ERR_UNKNOWN */
82
#include <signal.h> /* sigemptyset(), sigaddset(),
83
sigaction(), SIGTERM, sig_atomic_t,
84
raise() */
85
#include <sysexits.h> /* EX_OSERR, EX_USAGE */
86
87
78
#ifdef __linux__
88
79
#include <sys/klog.h> /* klogctl() */
89
#endif /* __linux__ */
80
#endif
90
81
91
82
/* Avahi */
92
83
/* All Avahi types, constants and functions
138
129
gpgme_ctx_t ctx;
139
130
} mandos_context;
140
131
141
/* global context so signal handler can reach it*/
142
mandos_context mc = { .simple_poll = NULL, .server = NULL,
143
.dh_bits = 1024, .priority = "SECURE256"
144
":!CTYPE-X.509:+CTYPE-OPENPGP" };
145
146
sig_atomic_t quit_now = 0;
147
int signal_received = 0;
148
149
132
/*
150
* Make additional room in "buffer" for at least BUFFER_SIZE more
151
* bytes. "buffer_capacity" is how much is currently allocated,
133
* Make room in "buffer" for at least BUFFER_SIZE additional bytes.
134
* "buffer_capacity" is how much is currently allocated,
152
135
* "buffer_length" is how much is already used.
153
136
*/
154
size_t incbuffer(char **buffer, size_t buffer_length,
137
size_t adjustbuffer(char **buffer, size_t buffer_length,
155
138
size_t buffer_capacity){
156
139
if(buffer_length + BUFFER_SIZE > buffer_capacity){
157
140
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
166
149
/*
167
150
* Initialize GPGME.
168
151
*/
169
static bool init_gpgme(const char *seckey,
152
static bool init_gpgme(mandos_context *mc, const char *seckey,
170
153
const char *pubkey, const char *tempdir){
154
int ret;
171
155
gpgme_error_t rc;
172
156
gpgme_engine_info_t engine_info;
173
157
176
160
* Helper function to insert pub and seckey to the engine keyring.
177
161
*/
178
162
bool import_key(const char *filename){
179
int ret;
180
163
int fd;
181
164
gpgme_data_t pgp_data;
182
165
193
176
return false;
194
177
}
195
178
196
rc = gpgme_op_import(mc.ctx, pgp_data);
179
rc = gpgme_op_import(mc->ctx, pgp_data);
197
180
if(rc != GPG_ERR_NO_ERROR){
198
181
fprintf(stderr, "bad gpgme_op_import: %s: %s\n",
199
182
gpgme_strsource(rc), gpgme_strerror(rc));
209
192
}
210
193
211
194
if(debug){
212
fprintf(stderr, "Initializing GPGME\n");
195
fprintf(stderr, "Initialize gpgme\n");
213
196
}
214
197
215
198
/* Init GPGME */
242
225
}
243
226
244
227
/* Create new GPGME "context" */
245
rc = gpgme_new(&(mc.ctx));
228
rc = gpgme_new(&(mc->ctx));
246
229
if(rc != GPG_ERR_NO_ERROR){
247
230
fprintf(stderr, "bad gpgme_new: %s: %s\n",
248
231
gpgme_strsource(rc), gpgme_strerror(rc));
253
236
return false;
254
237
}
255
238
256
return true;
239
return true;
257
240
}
258
241
259
242
/*
260
243
* Decrypt OpenPGP data.
261
244
* Returns -1 on error
262
245
*/
263
static ssize_t pgp_packet_decrypt(const char *cryptotext,
246
static ssize_t pgp_packet_decrypt(const mandos_context *mc,
247
const char *cryptotext,
264
248
size_t crypto_size,
265
249
char **plaintext){
266
250
gpgme_data_t dh_crypto, dh_plain;
293
277
294
278
/* Decrypt data from the cryptotext data buffer to the plaintext
295
279
data buffer */
296
rc = gpgme_op_decrypt(mc.ctx, dh_crypto, dh_plain);
280
rc = gpgme_op_decrypt(mc->ctx, dh_crypto, dh_plain);
297
281
if(rc != GPG_ERR_NO_ERROR){
298
282
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
299
283
gpgme_strsource(rc), gpgme_strerror(rc));
300
284
plaintext_length = -1;
301
285
if(debug){
302
286
gpgme_decrypt_result_t result;
303
result = gpgme_op_decrypt_result(mc.ctx);
287
result = gpgme_op_decrypt_result(mc->ctx);
304
288
if(result == NULL){
305
289
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
306
290
} else {
313
297
}
314
298
gpgme_recipient_t recipient;
315
299
recipient = result->recipients;
316
while(recipient != NULL){
317
fprintf(stderr, "Public key algorithm: %s\n",
318
gpgme_pubkey_algo_name(recipient->pubkey_algo));
319
fprintf(stderr, "Key ID: %s\n", recipient->keyid);
320
fprintf(stderr, "Secret key available: %s\n",
321
recipient->status == GPG_ERR_NO_SECKEY
322
? "No" : "Yes");
323
recipient = recipient->next;
300
if(recipient){
301
while(recipient != NULL){
302
fprintf(stderr, "Public key algorithm: %s\n",
303
gpgme_pubkey_algo_name(recipient->pubkey_algo));
304
fprintf(stderr, "Key ID: %s\n", recipient->keyid);
305
fprintf(stderr, "Secret key available: %s\n",
306
recipient->status == GPG_ERR_NO_SECKEY
307
? "No" : "Yes");
308
recipient = recipient->next;
309
}
324
310
}
325
311
}
326
312
}
340
326
341
327
*plaintext = NULL;
342
328
while(true){
343
plaintext_capacity = incbuffer(plaintext,
329
plaintext_capacity = adjustbuffer(plaintext,
344
330
(size_t)plaintext_length,
345
331
plaintext_capacity);
346
332
if(plaintext_capacity == 0){
347
perror("incbuffer");
333
perror("adjustbuffer");
348
334
plaintext_length = -1;
349
335
goto decrypt_end;
350
336
}
396
382
fprintf(stderr, "GnuTLS: %s", string);
397
383
}
398
384
399
static int init_gnutls_global(const char *pubkeyfilename,
385
static int init_gnutls_global(mandos_context *mc,
386
const char *pubkeyfilename,
400
387
const char *seckeyfilename){
401
388
int ret;
402
389
420
407
}
421
408
422
409
/* OpenPGP credentials */
423
gnutls_certificate_allocate_credentials(&mc.cred);
410
gnutls_certificate_allocate_credentials(&mc->cred);
424
411
if(ret != GNUTLS_E_SUCCESS){
425
412
fprintf(stderr, "GnuTLS memory error: %s\n", /* Spurious warning
426
from
427
-Wunreachable-code
428
*/
413
* from
414
* -Wunreachable-code
415
*/
429
416
safer_gnutls_strerror(ret));
430
417
gnutls_global_deinit();
431
418
return -1;
438
425
}
439
426
440
427
ret = gnutls_certificate_set_openpgp_key_file
441
(mc.cred, pubkeyfilename, seckeyfilename,
428
(mc->cred, pubkeyfilename, seckeyfilename,
442
429
GNUTLS_OPENPGP_FMT_BASE64);
443
430
if(ret != GNUTLS_E_SUCCESS){
444
431
fprintf(stderr,
450
437
}
451
438
452
439
/* GnuTLS server initialization */
453
ret = gnutls_dh_params_init(&mc.dh_params);
440
ret = gnutls_dh_params_init(&mc->dh_params);
454
441
if(ret != GNUTLS_E_SUCCESS){
455
442
fprintf(stderr, "Error in GnuTLS DH parameter initialization:"
456
443
" %s\n", safer_gnutls_strerror(ret));
457
444
goto globalfail;
458
445
}
459
ret = gnutls_dh_params_generate2(mc.dh_params, mc.dh_bits);
446
ret = gnutls_dh_params_generate2(mc->dh_params, mc->dh_bits);
460
447
if(ret != GNUTLS_E_SUCCESS){
461
448
fprintf(stderr, "Error in GnuTLS prime generation: %s\n",
462
449
safer_gnutls_strerror(ret));
463
450
goto globalfail;
464
451
}
465
452
466
gnutls_certificate_set_dh_params(mc.cred, mc.dh_params);
453
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
467
454
468
455
return 0;
469
456
470
457
globalfail:
471
458
472
gnutls_certificate_free_credentials(mc.cred);
459
gnutls_certificate_free_credentials(mc->cred);
473
460
gnutls_global_deinit();
474
gnutls_dh_params_deinit(mc.dh_params);
461
gnutls_dh_params_deinit(mc->dh_params);
475
462
return -1;
476
463
}
477
464
478
static int init_gnutls_session(gnutls_session_t *session){
465
static int init_gnutls_session(mandos_context *mc,
466
gnutls_session_t *session){
479
467
int ret;
480
468
/* GnuTLS session creation */
481
do {
482
ret = gnutls_init(session, GNUTLS_SERVER);
483
if(quit_now){
484
return -1;
485
}
486
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
469
ret = gnutls_init(session, GNUTLS_SERVER);
487
470
if(ret != GNUTLS_E_SUCCESS){
488
471
fprintf(stderr, "Error in GnuTLS session initialization: %s\n",
489
472
safer_gnutls_strerror(ret));
491
474
492
475
{
493
476
const char *err;
494
do {
495
ret = gnutls_priority_set_direct(*session, mc.priority, &err);
496
if(quit_now){
497
gnutls_deinit(*session);
498
return -1;
499
}
500
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
477
ret = gnutls_priority_set_direct(*session, mc->priority, &err);
501
478
if(ret != GNUTLS_E_SUCCESS){
502
479
fprintf(stderr, "Syntax error at: %s\n", err);
503
480
fprintf(stderr, "GnuTLS error: %s\n",
507
484
}
508
485
}
509
486
510
do {
511
ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,
512
mc.cred);
513
if(quit_now){
514
gnutls_deinit(*session);
515
return -1;
516
}
517
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
487
ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,
488
mc->cred);
518
489
if(ret != GNUTLS_E_SUCCESS){
519
490
fprintf(stderr, "Error setting GnuTLS credentials: %s\n",
520
491
safer_gnutls_strerror(ret));
523
494
}
524
495
525
496
/* ignore client certificate if any. */
526
gnutls_certificate_server_set_request(*session, GNUTLS_CERT_IGNORE);
497
gnutls_certificate_server_set_request(*session,
498
GNUTLS_CERT_IGNORE);
527
499
528
gnutls_dh_set_prime_bits(*session, mc.dh_bits);
500
gnutls_dh_set_prime_bits(*session, mc->dh_bits);
529
501
530
502
return 0;
531
503
}
537
509
/* Called when a Mandos server is found */
538
510
static int start_mandos_communication(const char *ip, uint16_t port,
539
511
AvahiIfIndex if_index,
540
int af){
541
int ret, tcp_sd = -1;
512
mandos_context *mc){
513
int ret, tcp_sd;
542
514
ssize_t sret;
543
union {
544
struct sockaddr_in in;
545
struct sockaddr_in6 in6;
546
} to;
515
union { struct sockaddr in; struct sockaddr_in6 in6; } to;
547
516
char *buffer = NULL;
548
char *decrypted_buffer = NULL;
517
char *decrypted_buffer;
549
518
size_t buffer_length = 0;
550
519
size_t buffer_capacity = 0;
520
ssize_t decrypted_buffer_size;
551
521
size_t written;
552
int retval = -1;
522
int retval = 0;
523
char interface[IF_NAMESIZE];
553
524
gnutls_session_t session;
554
int pf; /* Protocol family */
555
556
if(quit_now){
557
return -1;
558
}
559
560
switch(af){
561
case AF_INET6:
562
pf = PF_INET6;
563
break;
564
case AF_INET:
565
pf = PF_INET;
566
break;
567
default:
568
fprintf(stderr, "Bad address family: %d\n", af);
569
return -1;
570
}
571
572
ret = init_gnutls_session(&session);
525
526
ret = init_gnutls_session(mc, &session);
573
527
if(ret != 0){
574
528
return -1;
575
529
}
576
530
577
531
if(debug){
578
fprintf(stderr, "Setting up a TCP connection to %s, port %" PRIu16
532
fprintf(stderr, "Setting up a tcp connection to %s, port %" PRIu16
579
533
"\n", ip, port);
580
534
}
581
535
582
tcp_sd = socket(pf, SOCK_STREAM, 0);
536
tcp_sd = socket(PF_INET6, SOCK_STREAM, 0);
583
537
if(tcp_sd < 0){
584
538
perror("socket");
585
goto mandos_end;
539
return -1;
586
540
}
587
541
588
if(quit_now){
589
goto mandos_end;
542
if(debug){
543
if(if_indextoname((unsigned int)if_index, interface) == NULL){
544
perror("if_indextoname");
545
return -1;
546
}
547
fprintf(stderr, "Binding to interface %s\n", interface);
590
548
}
591
549
592
550
memset(&to, 0, sizeof(to));
593
if(af == AF_INET6){
594
to.in6.sin6_family = (sa_family_t)af;
595
ret = inet_pton(af, ip, &to.in6.sin6_addr);
596
} else { /* IPv4 */
597
to.in.sin_family = (sa_family_t)af;
598
ret = inet_pton(af, ip, &to.in.sin_addr);
599
}
551
to.in6.sin6_family = AF_INET6;
552
/* It would be nice to have a way to detect if we were passed an
553
IPv4 address here. Now we assume an IPv6 address. */
554
ret = inet_pton(AF_INET6, ip, &to.in6.sin6_addr);
600
555
if(ret < 0 ){
601
556
perror("inet_pton");
602
goto mandos_end;
557
return -1;
603
558
}
604
559
if(ret == 0){
605
560
fprintf(stderr, "Bad address: %s\n", ip);
606
goto mandos_end;
561
return -1;
607
562
}
608
if(af == AF_INET6){
609
to.in6.sin6_port = htons(port); /* Spurious warnings from
610
-Wconversion and
611
-Wunreachable-code */
612
613
if(IN6_IS_ADDR_LINKLOCAL /* Spurious warnings from */
614
(&to.in6.sin6_addr)){ /* -Wstrict-aliasing=2 or lower and
615
-Wunreachable-code*/
616
if(if_index == AVAHI_IF_UNSPEC){
617
fprintf(stderr, "An IPv6 link-local address is incomplete"
618
" without a network interface\n");
619
goto mandos_end;
620
}
621
/* Set the network interface number as scope */
622
to.in6.sin6_scope_id = (uint32_t)if_index;
623
}
624
} else {
625
to.in.sin_port = htons(port); /* Spurious warnings from
563
to.in6.sin6_port = htons(port); /* Spurious warnings from
626
564
-Wconversion and
627
565
-Wunreachable-code */
628
}
629
566
630
if(quit_now){
631
goto mandos_end;
632
}
567
to.in6.sin6_scope_id = (uint32_t)if_index;
633
568
634
569
if(debug){
635
if(af == AF_INET6 and if_index != AVAHI_IF_UNSPEC){
636
char interface[IF_NAMESIZE];
637
if(if_indextoname((unsigned int)if_index, interface) == NULL){
638
perror("if_indextoname");
639
} else {
640
fprintf(stderr, "Connection to: %s%%%s, port %" PRIu16 "\n",
641
ip, interface, port);
642
}
643
} else {
644
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
645
port);
646
}
647
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
648
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
649
const char *pcret;
650
if(af == AF_INET6){
651
pcret = inet_ntop(af, &(to.in6.sin6_addr), addrstr,
652
sizeof(addrstr));
653
} else {
654
pcret = inet_ntop(af, &(to.in.sin_addr), addrstr,
655
sizeof(addrstr));
656
}
657
if(pcret == NULL){
570
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
571
port);
572
char addrstr[INET6_ADDRSTRLEN] = "";
573
if(inet_ntop(to.in6.sin6_family, &(to.in6.sin6_addr), addrstr,
574
sizeof(addrstr)) == NULL){
658
575
perror("inet_ntop");
659
576
} else {
660
577
if(strcmp(addrstr, ip) != 0){
663
580
}
664
581
}
665
582
666
if(quit_now){
667
goto mandos_end;
668
}
669
670
if(af == AF_INET6){
671
ret = connect(tcp_sd, &to.in6, sizeof(to));
672
} else {
673
ret = connect(tcp_sd, &to.in, sizeof(to)); /* IPv4 */
674
}
583
ret = connect(tcp_sd, &to.in, sizeof(to));
675
584
if(ret < 0){
676
585
perror("connect");
677
goto mandos_end;
678
}
679
680
if(quit_now){
681
goto mandos_end;
586
return -1;
682
587
}
683
588
684
589
const char *out = mandos_protocol_version;
689
594
out_size - written));
690
595
if(ret == -1){
691
596
perror("write");
597
retval = -1;
692
598
goto mandos_end;
693
599
}
694
600
written += (size_t)ret;
702
608
break;
703
609
}
704
610
}
705
706
if(quit_now){
707
goto mandos_end;
708
}
709
611
}
710
612
711
613
if(debug){
712
614
fprintf(stderr, "Establishing TLS session with %s\n", ip);
713
615
}
714
616
715
if(quit_now){
716
goto mandos_end;
717
}
718
719
617
gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t) tcp_sd);
720
618
721
if(quit_now){
722
goto mandos_end;
723
}
724
725
do {
619
do{
726
620
ret = gnutls_handshake(session);
727
if(quit_now){
728
goto mandos_end;
729
}
730
621
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
731
622
732
623
if(ret != GNUTLS_E_SUCCESS){
734
625
fprintf(stderr, "*** GnuTLS Handshake failed ***\n");
735
626
gnutls_perror(ret);
736
627
}
628
retval = -1;
737
629
goto mandos_end;
738
630
}
739
631
740
632
/* Read OpenPGP packet that contains the wanted password */
741
633
742
634
if(debug){
743
fprintf(stderr, "Retrieving OpenPGP encrypted password from %s\n",
635
fprintf(stderr, "Retrieving pgp encrypted password from %s\n",
744
636
ip);
745
637
}
746
638
747
639
while(true){
748
749
if(quit_now){
750
goto mandos_end;
751
}
752
753
buffer_capacity = incbuffer(&buffer, buffer_length,
640
buffer_capacity = adjustbuffer(&buffer, buffer_length,
754
641
buffer_capacity);
755
642
if(buffer_capacity == 0){
756
perror("incbuffer");
757
goto mandos_end;
758
}
759
760
if(quit_now){
643
perror("adjustbuffer");
644
retval = -1;
761
645
goto mandos_end;
762
646
}
763
647
772
656
case GNUTLS_E_AGAIN:
773
657
break;
774
658
case GNUTLS_E_REHANDSHAKE:
775
do {
659
do{
776
660
ret = gnutls_handshake(session);
777
778
if(quit_now){
779
goto mandos_end;
780
}
781
661
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
782
662
if(ret < 0){
783
663
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
784
664
gnutls_perror(ret);
665
retval = -1;
785
666
goto mandos_end;
786
667
}
787
668
break;
788
669
default:
789
670
fprintf(stderr, "Unknown error while reading data from"
790
671
" encrypted session with Mandos server\n");
672
retval = -1;
791
673
gnutls_bye(session, GNUTLS_SHUT_RDWR);
792
674
goto mandos_end;
793
675
}
800
682
fprintf(stderr, "Closing TLS session\n");
801
683
}
802
684
803
if(quit_now){
804
goto mandos_end;
805
}
806
807
do {
808
ret = gnutls_bye(session, GNUTLS_SHUT_RDWR);
809
if(quit_now){
810
goto mandos_end;
811
}
812
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
685
gnutls_bye(session, GNUTLS_SHUT_RDWR);
813
686
814
687
if(buffer_length > 0){
815
ssize_t decrypted_buffer_size;
816
decrypted_buffer_size = pgp_packet_decrypt(buffer,
688
decrypted_buffer_size = pgp_packet_decrypt(mc, buffer,
817
689
buffer_length,
818
690
&decrypted_buffer);
819
691
if(decrypted_buffer_size >= 0){
820
821
692
written = 0;
822
693
while(written < (size_t) decrypted_buffer_size){
823
if(quit_now){
824
goto mandos_end;
825
}
826
827
694
ret = (int)fwrite(decrypted_buffer + written, 1,
828
695
(size_t)decrypted_buffer_size - written,
829
696
stdout);
832
699
fprintf(stderr, "Error writing encrypted data: %s\n",
833
700
strerror(errno));
834
701
}
835
goto mandos_end;
702
retval = -1;
703
break;
836
704
}
837
705
written += (size_t)ret;
838
706
}
839
retval = 0;
707
free(decrypted_buffer);
708
} else {
709
retval = -1;
840
710
}
711
} else {
712
retval = -1;
841
713
}
842
714
843
715
/* Shutdown procedure */
844
716
845
717
mandos_end:
846
free(decrypted_buffer);
847
718
free(buffer);
848
if(tcp_sd >= 0){
849
ret = (int)TEMP_FAILURE_RETRY(close(tcp_sd));
850
}
719
ret = (int)TEMP_FAILURE_RETRY(close(tcp_sd));
851
720
if(ret == -1){
852
721
perror("close");
853
722
}
854
723
gnutls_deinit(session);
855
if(quit_now){
856
retval = -1;
857
}
858
724
return retval;
859
725
}
860
726
861
727
static void resolve_callback(AvahiSServiceResolver *r,
862
728
AvahiIfIndex interface,
863
AvahiProtocol proto,
729
AVAHI_GCC_UNUSED AvahiProtocol protocol,
864
730
AvahiResolverEvent event,
865
731
const char *name,
866
732
const char *type,
871
737
AVAHI_GCC_UNUSED AvahiStringList *txt,
872
738
AVAHI_GCC_UNUSED AvahiLookupResultFlags
873
739
flags,
874
AVAHI_GCC_UNUSED void* userdata){
740
void* userdata){
741
mandos_context *mc = userdata;
875
742
assert(r);
876
743
877
744
/* Called whenever a service has been resolved successfully or
878
745
timed out */
879
746
880
if(quit_now){
881
return;
882
}
883
884
747
switch(event){
885
748
default:
886
749
case AVAHI_RESOLVER_FAILURE:
887
750
fprintf(stderr, "(Avahi Resolver) Failed to resolve service '%s'"
888
751
" of type '%s' in domain '%s': %s\n", name, type, domain,
889
avahi_strerror(avahi_server_errno(mc.server)));
752
avahi_strerror(avahi_server_errno(mc->server)));
890
753
break;
891
754
892
755
case AVAHI_RESOLVER_FOUND:
898
761
PRIdMAX ") on port %" PRIu16 "\n", name, host_name,
899
762
ip, (intmax_t)interface, port);
900
763
}
901
int ret = start_mandos_communication(ip, port, interface,
902
avahi_proto_to_af(proto));
764
int ret = start_mandos_communication(ip, port, interface, mc);
903
765
if(ret == 0){
904
avahi_simple_poll_quit(mc.simple_poll);
766
avahi_simple_poll_quit(mc->simple_poll);
905
767
}
906
768
}
907
769
}
917
779
const char *domain,
918
780
AVAHI_GCC_UNUSED AvahiLookupResultFlags
919
781
flags,
920
AVAHI_GCC_UNUSED void* userdata){
782
void* userdata){
783
mandos_context *mc = userdata;
921
784
assert(b);
922
785
923
786
/* Called whenever a new services becomes available on the LAN or
924
787
is removed from the LAN */
925
788
926
if(quit_now){
927
return;
928
}
929
930
789
switch(event){
931
790
default:
932
791
case AVAHI_BROWSER_FAILURE:
933
792
934
793
fprintf(stderr, "(Avahi browser) %s\n",
935
avahi_strerror(avahi_server_errno(mc.server)));
936
avahi_simple_poll_quit(mc.simple_poll);
794
avahi_strerror(avahi_server_errno(mc->server)));
795
avahi_simple_poll_quit(mc->simple_poll);
937
796
return;
938
797
939
798
case AVAHI_BROWSER_NEW:
942
801
the callback function is called the Avahi server will free the
943
802
resolver for us. */
944
803
945
if(avahi_s_service_resolver_new(mc.server, interface, protocol,
946
name, type, domain, protocol, 0,
947
resolve_callback, NULL) == NULL)
804
if(!(avahi_s_service_resolver_new(mc->server, interface,
805
protocol, name, type, domain,
806
AVAHI_PROTO_INET6, 0,
807
resolve_callback, mc)))
948
808
fprintf(stderr, "Avahi: Failed to resolve service '%s': %s\n",
949
name, avahi_strerror(avahi_server_errno(mc.server)));
809
name, avahi_strerror(avahi_server_errno(mc->server)));
950
810
break;
951
811
952
812
case AVAHI_BROWSER_REMOVE:
961
821
}
962
822
}
963
823
964
/* stop main loop after sigterm has been called */
965
static void handle_sigterm(int sig){
966
if(quit_now){
967
return;
968
}
969
quit_now = 1;
970
signal_received = sig;
971
int old_errno = errno;
972
if(mc.simple_poll != NULL){
973
avahi_simple_poll_quit(mc.simple_poll);
974
}
975
errno = old_errno;
976
}
977
978
824
int main(int argc, char *argv[]){
979
825
AvahiSServiceBrowser *sb = NULL;
980
826
int error;
981
827
int ret;
982
828
intmax_t tmpmax;
983
char *tmp;
829
int numchars;
984
830
int exitcode = EXIT_SUCCESS;
985
831
const char *interface = "eth0";
986
832
struct ifreq network;
987
int sd = -1;
988
bool take_down_interface = false;
833
int sd;
989
834
uid_t uid;
990
835
gid_t gid;
991
836
char *connect_to = NULL;
995
840
const char *seckey = PATHDIR "/" SECKEY;
996
841
const char *pubkey = PATHDIR "/" PUBKEY;
997
842
843
mandos_context mc = { .simple_poll = NULL, .server = NULL,
844
.dh_bits = 1024, .priority = "SECURE256"
845
":!CTYPE-X.509:+CTYPE-OPENPGP" };
998
846
bool gnutls_initialized = false;
999
847
bool gpgme_initialized = false;
1000
float delay = 2.5f;
1001
1002
struct sigaction old_sigterm_action = { .sa_handler = SIG_DFL };
1003
struct sigaction sigterm_action = { .sa_handler = handle_sigterm };
1004
1005
uid = getuid();
1006
gid = getgid();
1007
1008
/* Lower any group privileges we might have, just to be safe */
1009
errno = 0;
1010
ret = setgid(gid);
1011
if(ret == -1){
1012
perror("setgid");
1013
}
1014
1015
/* Lower user privileges (temporarily) */
1016
errno = 0;
1017
ret = seteuid(uid);
1018
if(ret == -1){
1019
perror("seteuid");
1020
}
1021
1022
if(quit_now){
1023
goto end;
1024
}
848
double delay = 2.5;
1025
849
1026
850
{
1027
851
struct argp_option options[] = {
1033
857
.group = 1 },
1034
858
{ .name = "interface", .key = 'i',
1035
859
.arg = "NAME",
1036
.doc = "Network interface that will be used to search for"
1037
" Mandos servers",
860
.doc = "Interface that will be used to search for Mandos"
861
" servers",
1038
862
.group = 1 },
1039
863
{ .name = "seckey", .key = 's',
1040
864
.arg = "FILE",
1057
881
.arg = "SECONDS",
1058
882
.doc = "Maximum delay to wait for interface startup",
1059
883
.group = 2 },
1060
/*
1061
* These reproduce what we would get without ARGP_NO_HELP
1062
*/
1063
{ .name = "help", .key = '?',
1064
.doc = "Give this help list", .group = -1 },
1065
{ .name = "usage", .key = -3,
1066
.doc = "Give a short usage message", .group = -1 },
1067
{ .name = "version", .key = 'V',
1068
.doc = "Print program version", .group = -1 },
1069
884
{ .name = NULL }
1070
885
};
1071
886
1072
887
error_t parse_opt(int key, char *arg,
1073
888
struct argp_state *state){
1074
errno = 0;
1075
889
switch(key){
1076
890
case 128: /* --debug */
1077
891
debug = true;
1089
903
pubkey = arg;
1090
904
break;
1091
905
case 129: /* --dh-bits */
1092
errno = 0;
1093
tmpmax = strtoimax(arg, &tmp, 10);
1094
if(errno != 0 or tmp == arg or *tmp != '\0'
1095
or tmpmax != (typeof(mc.dh_bits))tmpmax){
1096
argp_error(state, "Bad number of DH bits");
906
ret = sscanf(arg, "%" SCNdMAX "%n", &tmpmax, &numchars);
907
if(ret < 1 or tmpmax != (typeof(mc.dh_bits))tmpmax
908
or arg[numchars] != '\0'){
909
fprintf(stderr, "Bad number of DH bits\n");
910
exit(EXIT_FAILURE);
1097
911
}
1098
912
mc.dh_bits = (typeof(mc.dh_bits))tmpmax;
1099
913
break;
1101
915
mc.priority = arg;
1102
916
break;
1103
917
case 131: /* --delay */
1104
errno = 0;
1105
delay = strtof(arg, &tmp);
1106
if(errno != 0 or tmp == arg or *tmp != '\0'){
1107
argp_error(state, "Bad delay");
918
ret = sscanf(arg, "%lf%n", &delay, &numchars);
919
if(ret < 1 or arg[numchars] != '\0'){
920
fprintf(stderr, "Bad delay\n");
921
exit(EXIT_FAILURE);
1108
922
}
1109
923
break;
1110
/*
1111
* These reproduce what we would get without ARGP_NO_HELP
1112
*/
1113
case '?': /* --help */
1114
argp_state_help(state, state->out_stream,
1115
(ARGP_HELP_STD_HELP | ARGP_HELP_EXIT_ERR)
1116
& ~(unsigned int)ARGP_HELP_EXIT_OK);
1117
case -3: /* --usage */
1118
argp_state_help(state, state->out_stream,
1119
ARGP_HELP_USAGE | ARGP_HELP_EXIT_ERR);
1120
case 'V': /* --version */
1121
fprintf(state->out_stream, "%s\n", argp_program_version);
1122
exit(argp_err_exit_status);
924
case ARGP_KEY_ARG:
925
argp_usage(state);
926
case ARGP_KEY_END:
1123
927
break;
1124
928
default:
1125
929
return ARGP_ERR_UNKNOWN;
1126
930
}
1127
return errno;
931
return 0;
1128
932
}
1129
933
1130
934
struct argp argp = { .options = options, .parser = parse_opt,
1131
935
.args_doc = "",
1132
936
.doc = "Mandos client -- Get and decrypt"
1133
937
" passwords from a Mandos server" };
1134
ret = argp_parse(&argp, argc, argv,
1135
ARGP_IN_ORDER | ARGP_NO_HELP, 0, NULL);
1136
switch(ret){
1137
case 0:
1138
break;
1139
case ENOMEM:
1140
default:
1141
errno = ret;
1142
perror("argp_parse");
1143
exitcode = EX_OSERR;
1144
goto end;
1145
case EINVAL:
1146
exitcode = EX_USAGE;
1147
goto end;
1148
}
1149
}
1150
1151
if(not debug){
1152
avahi_set_log_function(empty_log);
1153
}
1154
1155
/* Initialize Avahi early so avahi_simple_poll_quit() can be called
1156
from the signal handler */
1157
/* Initialize the pseudo-RNG for Avahi */
1158
srand((unsigned int) time(NULL));
1159
mc.simple_poll = avahi_simple_poll_new();
1160
if(mc.simple_poll == NULL){
1161
fprintf(stderr, "Avahi: Failed to create simple poll object.\n");
1162
exitcode = EXIT_FAILURE;
1163
goto end;
1164
}
1165
1166
sigemptyset(&sigterm_action.sa_mask);
1167
ret = sigaddset(&sigterm_action.sa_mask, SIGINT);
1168
if(ret == -1){
1169
perror("sigaddset");
1170
exitcode = EXIT_FAILURE;
1171
goto end;
1172
}
1173
ret = sigaddset(&sigterm_action.sa_mask, SIGHUP);
1174
if(ret == -1){
1175
perror("sigaddset");
1176
exitcode = EXIT_FAILURE;
1177
goto end;
1178
}
1179
ret = sigaddset(&sigterm_action.sa_mask, SIGTERM);
1180
if(ret == -1){
1181
perror("sigaddset");
1182
exitcode = EXIT_FAILURE;
1183
goto end;
1184
}
1185
/* Need to check if the handler is SIG_IGN before handling:
1186
| [[info:libc:Initial Signal Actions]] |
1187
| [[info:libc:Basic Signal Handling]] |
1188
*/
1189
ret = sigaction(SIGINT, NULL, &old_sigterm_action);
1190
if(ret == -1){
1191
perror("sigaction");
1192
return EXIT_FAILURE;
1193
}
1194
if(old_sigterm_action.sa_handler != SIG_IGN){
1195
ret = sigaction(SIGINT, &sigterm_action, NULL);
1196
if(ret == -1){
1197
perror("sigaction");
1198
exitcode = EXIT_FAILURE;
1199
goto end;
1200
}
1201
}
1202
ret = sigaction(SIGHUP, NULL, &old_sigterm_action);
1203
if(ret == -1){
1204
perror("sigaction");
1205
return EXIT_FAILURE;
1206
}
1207
if(old_sigterm_action.sa_handler != SIG_IGN){
1208
ret = sigaction(SIGHUP, &sigterm_action, NULL);
1209
if(ret == -1){
1210
perror("sigaction");
1211
exitcode = EXIT_FAILURE;
1212
goto end;
1213
}
1214
}
1215
ret = sigaction(SIGTERM, NULL, &old_sigterm_action);
1216
if(ret == -1){
1217
perror("sigaction");
1218
return EXIT_FAILURE;
1219
}
1220
if(old_sigterm_action.sa_handler != SIG_IGN){
1221
ret = sigaction(SIGTERM, &sigterm_action, NULL);
1222
if(ret == -1){
1223
perror("sigaction");
938
ret = argp_parse(&argp, argc, argv, 0, 0, NULL);
939
if(ret == ARGP_ERR_UNKNOWN){
940
fprintf(stderr, "Unknown error while parsing arguments\n");
1224
941
exitcode = EXIT_FAILURE;
1225
942
goto end;
1226
943
}
1227
944
}
1228
945
1229
946
/* If the interface is down, bring it up */
1230
if(interface[0] != '\0'){
1231
if_index = (AvahiIfIndex) if_nametoindex(interface);
1232
if(if_index == 0){
1233
fprintf(stderr, "No such interface: \"%s\"\n", interface);
1234
exitcode = EXIT_FAILURE;
1235
goto end;
1236
}
1237
1238
if(quit_now){
1239
goto end;
1240
}
1241
1242
/* Re-raise priviliges */
1243
errno = 0;
1244
ret = seteuid(0);
1245
if(ret == -1){
1246
perror("seteuid");
1247
}
1248
947
{
1249
948
#ifdef __linux__
1250
949
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1251
messages about the network interface to mess up the prompt */
950
messages to mess up the prompt */
1252
951
ret = klogctl(8, NULL, 5);
1253
bool restore_loglevel = true;
1254
952
if(ret == -1){
1255
restore_loglevel = false;
1256
953
perror("klogctl");
1257
954
}
1258
#endif /* __linux__ */
955
#endif
1259
956
1260
957
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1261
958
if(sd < 0){
1262
959
perror("socket");
1263
960
exitcode = EXIT_FAILURE;
1264
961
#ifdef __linux__
1265
if(restore_loglevel){
1266
ret = klogctl(7, NULL, 0);
1267
if(ret == -1){
1268
perror("klogctl");
1269
}
1270
}
1271
#endif /* __linux__ */
1272
/* Lower privileges */
1273
errno = 0;
1274
ret = seteuid(uid);
962
ret = klogctl(7, NULL, 0);
1275
963
if(ret == -1){
1276
perror("seteuid");
964
perror("klogctl");
1277
965
}
966
#endif
1278
967
goto end;
1279
968
}
1280
969
strcpy(network.ifr_name, interface);
1282
971
if(ret == -1){
1283
972
perror("ioctl SIOCGIFFLAGS");
1284
973
#ifdef __linux__
1285
if(restore_loglevel){
1286
ret = klogctl(7, NULL, 0);
1287
if(ret == -1){
1288
perror("klogctl");
1289
}
974
ret = klogctl(7, NULL, 0);
975
if(ret == -1){
976
perror("klogctl");
1290
977
}
1291
#endif /* __linux__ */
978
#endif
1292
979
exitcode = EXIT_FAILURE;
1293
/* Lower privileges */
1294
errno = 0;
1295
ret = seteuid(uid);
1296
if(ret == -1){
1297
perror("seteuid");
1298
}
1299
980
goto end;
1300
981
}
1301
982
if((network.ifr_flags & IFF_UP) == 0){
1302
983
network.ifr_flags |= IFF_UP;
1303
take_down_interface = true;
1304
984
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1305
985
if(ret == -1){
1306
take_down_interface = false;
1307
986
perror("ioctl SIOCSIFFLAGS");
1308
987
exitcode = EXIT_FAILURE;
1309
988
#ifdef __linux__
1310
if(restore_loglevel){
1311
ret = klogctl(7, NULL, 0);
1312
if(ret == -1){
1313
perror("klogctl");
1314
}
1315
}
1316
#endif /* __linux__ */
1317
/* Lower privileges */
1318
errno = 0;
1319
ret = seteuid(uid);
989
ret = klogctl(7, NULL, 0);
1320
990
if(ret == -1){
1321
perror("seteuid");
991
perror("klogctl");
1322
992
}
993
#endif
1323
994
goto end;
1324
995
}
1325
996
}
1337
1008
perror("nanosleep");
1338
1009
}
1339
1010
}
1340
if(not take_down_interface){
1341
/* We won't need the socket anymore */
1342
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1343
if(ret == -1){
1344
perror("close");
1345
}
1011
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1012
if(ret == -1){
1013
perror("close");
1346
1014
}
1347
1015
#ifdef __linux__
1348
if(restore_loglevel){
1349
/* Restores kernel loglevel to default */
1350
ret = klogctl(7, NULL, 0);
1351
if(ret == -1){
1352
perror("klogctl");
1353
}
1354
}
1355
#endif /* __linux__ */
1356
/* Lower privileges */
1357
errno = 0;
1358
if(take_down_interface){
1359
/* Lower privileges */
1360
ret = seteuid(uid);
1361
if(ret == -1){
1362
perror("seteuid");
1363
}
1364
} else {
1365
/* Lower privileges permanently */
1366
ret = setuid(uid);
1367
if(ret == -1){
1368
perror("setuid");
1369
}
1370
}
1371
}
1372
1373
if(quit_now){
1374
goto end;
1375
}
1376
1377
ret = init_gnutls_global(pubkey, seckey);
1016
/* Restores kernel loglevel to default */
1017
ret = klogctl(7, NULL, 0);
1018
if(ret == -1){
1019
perror("klogctl");
1020
}
1021
#endif
1022
}
1023
1024
uid = getuid();
1025
gid = getgid();
1026
1027
setgid(gid);
1028
if(ret == -1){
1029
perror("setgid");
1030
}
1031
1032
ret = setuid(uid);
1033
if(ret == -1){
1034
perror("setuid");
1035
}
1036
1037
ret = init_gnutls_global(&mc, pubkey, seckey);
1378
1038
if(ret == -1){
1379
1039
fprintf(stderr, "init_gnutls_global failed\n");
1380
1040
exitcode = EXIT_FAILURE;
1383
1043
gnutls_initialized = true;
1384
1044
}
1385
1045
1386
if(quit_now){
1387
goto end;
1388
}
1389
1390
tempdir_created = true;
1391
1046
if(mkdtemp(tempdir) == NULL){
1392
tempdir_created = false;
1393
1047
perror("mkdtemp");
1394
1048
goto end;
1395
1049
}
1396
1397
if(quit_now){
1398
goto end;
1399
}
1400
1401
if(not init_gpgme(pubkey, seckey, tempdir)){
1050
tempdir_created = true;
1051
1052
if(not init_gpgme(&mc, pubkey, seckey, tempdir)){
1402
1053
fprintf(stderr, "init_gpgme failed\n");
1403
1054
exitcode = EXIT_FAILURE;
1404
1055
goto end;
1406
1057
gpgme_initialized = true;
1407
1058
}
1408
1059
1409
if(quit_now){
1060
if_index = (AvahiIfIndex) if_nametoindex(interface);
1061
if(if_index == 0){
1062
fprintf(stderr, "No such interface: \"%s\"\n", interface);
1063
exitcode = EXIT_FAILURE;
1410
1064
goto end;
1411
1065
}
1412
1066
1419
1073
exitcode = EXIT_FAILURE;
1420
1074
goto end;
1421
1075
}
1422
1423
if(quit_now){
1424
goto end;
1425
}
1426
1427
1076
uint16_t port;
1428
errno = 0;
1429
tmpmax = strtoimax(address+1, &tmp, 10);
1430
if(errno != 0 or tmp == address+1 or *tmp != '\0'
1431
or tmpmax != (uint16_t)tmpmax){
1077
ret = sscanf(address+1, "%" SCNdMAX "%n", &tmpmax, &numchars);
1078
if(ret < 1 or tmpmax != (uint16_t)tmpmax
1079
or address[numchars+1] != '\0'){
1432
1080
fprintf(stderr, "Bad port number\n");
1433
1081
exitcode = EXIT_FAILURE;
1434
1082
goto end;
1435
1083
}
1436
1437
if(quit_now){
1438
goto end;
1439
}
1440
1441
1084
port = (uint16_t)tmpmax;
1442
1085
*address = '\0';
1443
1086
address = connect_to;
1444
/* Colon in address indicates IPv6 */
1445
int af;
1446
if(strchr(address, ':') != NULL){
1447
af = AF_INET6;
1448
} else {
1449
af = AF_INET;
1450
}
1451
1452
if(quit_now){
1453
goto end;
1454
}
1455
1456
ret = start_mandos_communication(address, port, if_index, af);
1087
ret = start_mandos_communication(address, port, if_index, &mc);
1457
1088
if(ret < 0){
1458
1089
exitcode = EXIT_FAILURE;
1459
1090
} else {
1462
1093
goto end;
1463
1094
}
1464
1095
1465
if(quit_now){
1096
if(not debug){
1097
avahi_set_log_function(empty_log);
1098
}
1099
1100
/* Initialize the pseudo-RNG for Avahi */
1101
srand((unsigned int) time(NULL));
1102
1103
/* Allocate main Avahi loop object */
1104
mc.simple_poll = avahi_simple_poll_new();
1105
if(mc.simple_poll == NULL){
1106
fprintf(stderr, "Avahi: Failed to create simple poll object.\n");
1107
exitcode = EXIT_FAILURE;
1466
1108
goto end;
1467
1109
}
1468
1110
1492
1134
goto end;
1493
1135
}
1494
1136
1495
if(quit_now){
1496
goto end;
1497
}
1498
1499
1137
/* Create the Avahi service browser */
1500
1138
sb = avahi_s_service_browser_new(mc.server, if_index,
1501
AVAHI_PROTO_UNSPEC, "_mandos._tcp",
1502
NULL, 0, browse_callback, NULL);
1139
AVAHI_PROTO_INET6, "_mandos._tcp",
1140
NULL, 0, browse_callback, &mc);
1503
1141
if(sb == NULL){
1504
1142
fprintf(stderr, "Failed to create service browser: %s\n",
1505
1143
avahi_strerror(avahi_server_errno(mc.server)));
1507
1145
goto end;
1508
1146
}
1509
1147
1510
if(quit_now){
1511
goto end;
1512
}
1513
1514
1148
/* Run the main loop */
1515
1149
1516
1150
if(debug){
1545
1179
gpgme_release(mc.ctx);
1546
1180
}
1547
1181
1548
/* Take down the network interface */
1549
if(take_down_interface){
1550
/* Re-raise priviliges */
1551
errno = 0;
1552
ret = seteuid(0);
1553
if(ret == -1){
1554
perror("seteuid");
1555
}
1556
if(geteuid() == 0){
1557
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1558
if(ret == -1){
1559
perror("ioctl SIOCGIFFLAGS");
1560
} else if(network.ifr_flags & IFF_UP) {
1561
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
1562
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1563
if(ret == -1){
1564
perror("ioctl SIOCSIFFLAGS");
1565
}
1566
}
1567
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1568
if(ret == -1){
1569
perror("close");
1570
}
1571
/* Lower privileges permanently */
1572
errno = 0;
1573
ret = setuid(uid);
1574
if(ret == -1){
1575
perror("setuid");
1576
}
1577
}
1578
}
1579
1580
1182
/* Removes the temp directory used by GPGME */
1581
1183
if(tempdir_created){
1582
1184
DIR *d;
1621
1223
}
1622
1224
}
1623
1225
1624
if(quit_now){
1625
sigemptyset(&old_sigterm_action.sa_mask);
1626
old_sigterm_action.sa_handler = SIG_DFL;
1627
ret = (int)TEMP_FAILURE_RETRY(sigaction(signal_received,
1628
&old_sigterm_action,
1629
NULL));
1630
if(ret == -1){
1631
perror("sigaction");
1632
}
1633
do {
1634
ret = raise(signal_received);
1635
} while(ret != 0 and errno == EINTR);
1636
if(ret != 0){
1637
perror("raise");
1638
abort();
1639
}
1640
TEMP_FAILURE_RETRY(pause());
1641
}
1642
1643
1226
return exitcode;
1644
1227
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0