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- Committer: Teddy Hogeborn
- Date: 2009-10-24 19:17:52 UTC
- Revision ID: teddy@fukt.bsnet.se-20091024191752-7g6xlf6wpp2pdexb
Convert some programs to use the exit codes from <sysexits.h>. Change
all programs using the "argp" parsing functions to use them correctly;
checking return value, using argp_error() to report parse errors etc.
* plugin-runner.c: Use <sysexits.h> exit codes. Always use fallback,
even on option errors, except for "--help", etc.
(getplugin): Make sure "errno" is set correctly on return.
(main): Declare our own "--help", "--usage", and "--version"
options which do not cause the fallback to be invoked.
In all other options, use fallback on any error.
(parse_opt, parse_opt_config_file): Reset errno at start and return
errno. No need to check "arg"
for NULL. New "--help",
"--usage", and "--version"
options.
(parse_opt): Accept empty string as global option. Do not print
errors which will be detected and reported later. Do
"argp_error()" on parse error or empty plugin names.
* plugins.d/mandos-client.c: Use <sysexits.h> exit codes. Do not
return successful exit code on "--help",
etc. since this would give the wrong
message to "plugin-runner".
(main): Declare our own "--help", "--usage", and "--version"
options which do not return a successful exit code.
(parse_opt): Reset errno at start and return errno. Do
"argp_error()" on parse errors. New "--help",
"--usage", and "--version" options.
* plugins.d/password-prompt.c: Use exit codes from <sysexits.h>. Do
not return successful exit code on
"--help", etc. since this would give
the wrong message to "plugin-runner".
(main): Declare our own "--help", "--usage", and "--version" options
which do not return a successful exit code. Do
close(STDOUT_FILENO) after writing to check its return code.
(parse_opt): Reset errno at start and return errno.
all programs using the "argp" parsing functions to use them correctly;
checking return value, using argp_error() to report parse errors etc.
* plugin-runner.c: Use <sysexits.h> exit codes. Always use fallback,
even on option errors, except for "--help", etc.
(getplugin): Make sure "errno" is set correctly on return.
(main): Declare our own "--help", "--usage", and "--version"
options which do not cause the fallback to be invoked.
In all other options, use fallback on any error.
(parse_opt, parse_opt_config_file): Reset errno at start and return
errno. No need to check "arg"
for NULL. New "--help",
"--usage", and "--version"
options.
(parse_opt): Accept empty string as global option. Do not print
errors which will be detected and reported later. Do
"argp_error()" on parse error or empty plugin names.
* plugins.d/mandos-client.c: Use <sysexits.h> exit codes. Do not
return successful exit code on "--help",
etc. since this would give the wrong
message to "plugin-runner".
(main): Declare our own "--help", "--usage", and "--version"
options which do not return a successful exit code.
(parse_opt): Reset errno at start and return errno. Do
"argp_error()" on parse errors. New "--help",
"--usage", and "--version" options.
* plugins.d/password-prompt.c: Use exit codes from <sysexits.h>. Do
not return successful exit code on
"--help", etc. since this would give
the wrong message to "plugin-runner".
(main): Declare our own "--help", "--usage", and "--version" options
which do not return a successful exit code. Do
close(STDOUT_FILENO) after writing to check its return code.
(parse_opt): Reset errno at start and return errno.
- 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
33
34
#define _LARGEFILE_SOURCE
35
#endif
36
#ifndef _FILE_OFFSET_BITS
34
37
#define _FILE_OFFSET_BITS 64
38
#endif
35
39
36
40
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), asprintf() */
37
41
38
42
#include <stdio.h> /* fprintf(), stderr, fwrite(),
39
stdout, ferror(), sscanf(),
40
remove() */
43
stdout, ferror(), remove() */
41
44
#include <stdint.h> /* uint16_t, uint32_t */
42
45
#include <stddef.h> /* NULL, size_t, ssize_t */
43
46
#include <stdlib.h> /* free(), EXIT_SUCCESS, EXIT_FAILURE,
44
srand() */
45
#include <stdbool.h> /* bool, true */
47
srand(), strtof(), abort() */
48
#include <stdbool.h> /* bool, false, true */
46
49
#include <string.h> /* memset(), strcmp(), strlen(),
47
50
strerror(), asprintf(), strcpy() */
48
#include <sys/ioctl.h> /* ioctl */
51
#include <sys/ioctl.h> /* ioctl */
49
52
#include <sys/types.h> /* socket(), inet_pton(), sockaddr,
50
53
sockaddr_in6, PF_INET6,
51
SOCK_STREAM, INET6_ADDRSTRLEN,
52
uid_t, gid_t, open(), opendir(),
53
DIR */
54
SOCK_STREAM, uid_t, gid_t, open(),
55
opendir(), DIR */
54
56
#include <sys/stat.h> /* open() */
55
57
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
56
struct in6_addr, inet_pton(),
57
connect() */
58
inet_pton(), connect() */
58
59
#include <fcntl.h> /* open() */
59
60
#include <dirent.h> /* opendir(), struct dirent, readdir()
60
61
*/
61
#include <inttypes.h> /* PRIu16, intmax_t, SCNdMAX */
62
#include <inttypes.h> /* PRIu16, PRIdMAX, intmax_t,
63
strtoimax() */
62
64
#include <assert.h> /* assert() */
63
65
#include <errno.h> /* perror(), errno */
64
66
#include <time.h> /* nanosleep(), time() */
65
67
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
66
68
SIOCSIFFLAGS, if_indextoname(),
67
69
if_nametoindex(), IF_NAMESIZE */
68
#include <netinet/in.h>
70
#include <netinet/in.h> /* IN6_IS_ADDR_LINKLOCAL,
71
INET_ADDRSTRLEN, INET6_ADDRSTRLEN
72
*/
69
73
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
70
getuid(), getgid(), setuid(),
71
setgid() */
74
getuid(), getgid(), seteuid(),
75
setgid(), pause() */
72
76
#include <arpa/inet.h> /* inet_pton(), htons */
73
#include <iso646.h> /* not, and, or */
77
#include <iso646.h> /* not, or, and */
74
78
#include <argp.h> /* struct argp_option, error_t, struct
75
79
argp_state, struct argp,
76
80
argp_parse(), ARGP_KEY_ARG,
77
81
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
78
87
#ifdef __linux__
79
88
#include <sys/klog.h> /* klogctl() */
80
#endif
89
#endif /* __linux__ */
81
90
82
91
/* Avahi */
83
92
/* All Avahi types, constants and functions
129
138
gpgme_ctx_t ctx;
130
139
} mandos_context;
131
140
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
132
149
/*
133
* Make room in "buffer" for at least BUFFER_SIZE additional bytes.
134
* "buffer_capacity" is how much is currently allocated,
150
* Make additional room in "buffer" for at least BUFFER_SIZE more
151
* bytes. "buffer_capacity" is how much is currently allocated,
135
152
* "buffer_length" is how much is already used.
136
153
*/
137
size_t adjustbuffer(char **buffer, size_t buffer_length,
154
size_t incbuffer(char **buffer, size_t buffer_length,
138
155
size_t buffer_capacity){
139
156
if(buffer_length + BUFFER_SIZE > buffer_capacity){
140
157
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
149
166
/*
150
167
* Initialize GPGME.
151
168
*/
152
static bool init_gpgme(mandos_context *mc, const char *seckey,
169
static bool init_gpgme(const char *seckey,
153
170
const char *pubkey, const char *tempdir){
154
int ret;
155
171
gpgme_error_t rc;
156
172
gpgme_engine_info_t engine_info;
157
173
160
176
* Helper function to insert pub and seckey to the engine keyring.
161
177
*/
162
178
bool import_key(const char *filename){
179
int ret;
163
180
int fd;
164
181
gpgme_data_t pgp_data;
165
182
176
193
return false;
177
194
}
178
195
179
rc = gpgme_op_import(mc->ctx, pgp_data);
196
rc = gpgme_op_import(mc.ctx, pgp_data);
180
197
if(rc != GPG_ERR_NO_ERROR){
181
198
fprintf(stderr, "bad gpgme_op_import: %s: %s\n",
182
199
gpgme_strsource(rc), gpgme_strerror(rc));
192
209
}
193
210
194
211
if(debug){
195
fprintf(stderr, "Initialize gpgme\n");
212
fprintf(stderr, "Initializing GPGME\n");
196
213
}
197
214
198
215
/* Init GPGME */
225
242
}
226
243
227
244
/* Create new GPGME "context" */
228
rc = gpgme_new(&(mc->ctx));
245
rc = gpgme_new(&(mc.ctx));
229
246
if(rc != GPG_ERR_NO_ERROR){
230
247
fprintf(stderr, "bad gpgme_new: %s: %s\n",
231
248
gpgme_strsource(rc), gpgme_strerror(rc));
236
253
return false;
237
254
}
238
255
239
return true;
256
return true;
240
257
}
241
258
242
259
/*
243
260
* Decrypt OpenPGP data.
244
261
* Returns -1 on error
245
262
*/
246
static ssize_t pgp_packet_decrypt(const mandos_context *mc,
247
const char *cryptotext,
263
static ssize_t pgp_packet_decrypt(const char *cryptotext,
248
264
size_t crypto_size,
249
265
char **plaintext){
250
266
gpgme_data_t dh_crypto, dh_plain;
277
293
278
294
/* Decrypt data from the cryptotext data buffer to the plaintext
279
295
data buffer */
280
rc = gpgme_op_decrypt(mc->ctx, dh_crypto, dh_plain);
296
rc = gpgme_op_decrypt(mc.ctx, dh_crypto, dh_plain);
281
297
if(rc != GPG_ERR_NO_ERROR){
282
298
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
283
299
gpgme_strsource(rc), gpgme_strerror(rc));
284
300
plaintext_length = -1;
285
301
if(debug){
286
302
gpgme_decrypt_result_t result;
287
result = gpgme_op_decrypt_result(mc->ctx);
303
result = gpgme_op_decrypt_result(mc.ctx);
288
304
if(result == NULL){
289
305
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
290
306
} else {
297
313
}
298
314
gpgme_recipient_t recipient;
299
315
recipient = result->recipients;
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
}
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;
310
324
}
311
325
}
312
326
}
326
340
327
341
*plaintext = NULL;
328
342
while(true){
329
plaintext_capacity = adjustbuffer(plaintext,
343
plaintext_capacity = incbuffer(plaintext,
330
344
(size_t)plaintext_length,
331
345
plaintext_capacity);
332
346
if(plaintext_capacity == 0){
333
perror("adjustbuffer");
347
perror("incbuffer");
334
348
plaintext_length = -1;
335
349
goto decrypt_end;
336
350
}
382
396
fprintf(stderr, "GnuTLS: %s", string);
383
397
}
384
398
385
static int init_gnutls_global(mandos_context *mc,
386
const char *pubkeyfilename,
399
static int init_gnutls_global(const char *pubkeyfilename,
387
400
const char *seckeyfilename){
388
401
int ret;
389
402
407
420
}
408
421
409
422
/* OpenPGP credentials */
410
gnutls_certificate_allocate_credentials(&mc->cred);
423
gnutls_certificate_allocate_credentials(&mc.cred);
411
424
if(ret != GNUTLS_E_SUCCESS){
412
425
fprintf(stderr, "GnuTLS memory error: %s\n", /* Spurious warning
413
* from
414
* -Wunreachable-code
415
*/
426
from
427
-Wunreachable-code
428
*/
416
429
safer_gnutls_strerror(ret));
417
430
gnutls_global_deinit();
418
431
return -1;
425
438
}
426
439
427
440
ret = gnutls_certificate_set_openpgp_key_file
428
(mc->cred, pubkeyfilename, seckeyfilename,
441
(mc.cred, pubkeyfilename, seckeyfilename,
429
442
GNUTLS_OPENPGP_FMT_BASE64);
430
443
if(ret != GNUTLS_E_SUCCESS){
431
444
fprintf(stderr,
437
450
}
438
451
439
452
/* GnuTLS server initialization */
440
ret = gnutls_dh_params_init(&mc->dh_params);
453
ret = gnutls_dh_params_init(&mc.dh_params);
441
454
if(ret != GNUTLS_E_SUCCESS){
442
455
fprintf(stderr, "Error in GnuTLS DH parameter initialization:"
443
456
" %s\n", safer_gnutls_strerror(ret));
444
457
goto globalfail;
445
458
}
446
ret = gnutls_dh_params_generate2(mc->dh_params, mc->dh_bits);
459
ret = gnutls_dh_params_generate2(mc.dh_params, mc.dh_bits);
447
460
if(ret != GNUTLS_E_SUCCESS){
448
461
fprintf(stderr, "Error in GnuTLS prime generation: %s\n",
449
462
safer_gnutls_strerror(ret));
450
463
goto globalfail;
451
464
}
452
465
453
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
466
gnutls_certificate_set_dh_params(mc.cred, mc.dh_params);
454
467
455
468
return 0;
456
469
457
470
globalfail:
458
471
459
gnutls_certificate_free_credentials(mc->cred);
472
gnutls_certificate_free_credentials(mc.cred);
460
473
gnutls_global_deinit();
461
gnutls_dh_params_deinit(mc->dh_params);
474
gnutls_dh_params_deinit(mc.dh_params);
462
475
return -1;
463
476
}
464
477
465
static int init_gnutls_session(mandos_context *mc,
466
gnutls_session_t *session){
478
static int init_gnutls_session(gnutls_session_t *session){
467
479
int ret;
468
480
/* GnuTLS session creation */
469
ret = gnutls_init(session, GNUTLS_SERVER);
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);
470
487
if(ret != GNUTLS_E_SUCCESS){
471
488
fprintf(stderr, "Error in GnuTLS session initialization: %s\n",
472
489
safer_gnutls_strerror(ret));
474
491
475
492
{
476
493
const char *err;
477
ret = gnutls_priority_set_direct(*session, mc->priority, &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);
478
501
if(ret != GNUTLS_E_SUCCESS){
479
502
fprintf(stderr, "Syntax error at: %s\n", err);
480
503
fprintf(stderr, "GnuTLS error: %s\n",
484
507
}
485
508
}
486
509
487
ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,
488
mc->cred);
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);
489
518
if(ret != GNUTLS_E_SUCCESS){
490
519
fprintf(stderr, "Error setting GnuTLS credentials: %s\n",
491
520
safer_gnutls_strerror(ret));
494
523
}
495
524
496
525
/* ignore client certificate if any. */
497
gnutls_certificate_server_set_request(*session,
498
GNUTLS_CERT_IGNORE);
526
gnutls_certificate_server_set_request(*session, GNUTLS_CERT_IGNORE);
499
527
500
gnutls_dh_set_prime_bits(*session, mc->dh_bits);
528
gnutls_dh_set_prime_bits(*session, mc.dh_bits);
501
529
502
530
return 0;
503
531
}
509
537
/* Called when a Mandos server is found */
510
538
static int start_mandos_communication(const char *ip, uint16_t port,
511
539
AvahiIfIndex if_index,
512
mandos_context *mc){
513
int ret, tcp_sd;
540
int af){
541
int ret, tcp_sd = -1;
514
542
ssize_t sret;
515
union { struct sockaddr in; struct sockaddr_in6 in6; } to;
543
union {
544
struct sockaddr_in in;
545
struct sockaddr_in6 in6;
546
} to;
516
547
char *buffer = NULL;
517
char *decrypted_buffer;
548
char *decrypted_buffer = NULL;
518
549
size_t buffer_length = 0;
519
550
size_t buffer_capacity = 0;
520
ssize_t decrypted_buffer_size;
521
551
size_t written;
522
int retval = 0;
523
char interface[IF_NAMESIZE];
552
int retval = -1;
524
553
gnutls_session_t session;
525
526
ret = init_gnutls_session(mc, &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);
527
573
if(ret != 0){
528
574
return -1;
529
575
}
530
576
531
577
if(debug){
532
fprintf(stderr, "Setting up a tcp connection to %s, port %" PRIu16
578
fprintf(stderr, "Setting up a TCP connection to %s, port %" PRIu16
533
579
"\n", ip, port);
534
580
}
535
581
536
tcp_sd = socket(PF_INET6, SOCK_STREAM, 0);
582
tcp_sd = socket(pf, SOCK_STREAM, 0);
537
583
if(tcp_sd < 0){
538
584
perror("socket");
539
return -1;
585
goto mandos_end;
540
586
}
541
587
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);
588
if(quit_now){
589
goto mandos_end;
548
590
}
549
591
550
592
memset(&to, 0, sizeof(to));
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);
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
}
555
600
if(ret < 0 ){
556
601
perror("inet_pton");
557
return -1;
602
goto mandos_end;
558
603
}
559
604
if(ret == 0){
560
605
fprintf(stderr, "Bad address: %s\n", ip);
561
return -1;
606
goto mandos_end;
562
607
}
563
to.in6.sin6_port = htons(port); /* Spurious warnings from
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
564
626
-Wconversion and
565
627
-Wunreachable-code */
628
}
566
629
567
to.in6.sin6_scope_id = (uint32_t)if_index;
630
if(quit_now){
631
goto mandos_end;
632
}
568
633
569
634
if(debug){
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){
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){
575
658
perror("inet_ntop");
576
659
} else {
577
660
if(strcmp(addrstr, ip) != 0){
580
663
}
581
664
}
582
665
583
ret = connect(tcp_sd, &to.in, sizeof(to));
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
}
584
675
if(ret < 0){
585
676
perror("connect");
586
return -1;
677
goto mandos_end;
678
}
679
680
if(quit_now){
681
goto mandos_end;
587
682
}
588
683
589
684
const char *out = mandos_protocol_version;
594
689
out_size - written));
595
690
if(ret == -1){
596
691
perror("write");
597
retval = -1;
598
692
goto mandos_end;
599
693
}
600
694
written += (size_t)ret;
608
702
break;
609
703
}
610
704
}
705
706
if(quit_now){
707
goto mandos_end;
708
}
611
709
}
612
710
613
711
if(debug){
614
712
fprintf(stderr, "Establishing TLS session with %s\n", ip);
615
713
}
616
714
715
if(quit_now){
716
goto mandos_end;
717
}
718
617
719
gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t) tcp_sd);
618
720
619
do{
721
if(quit_now){
722
goto mandos_end;
723
}
724
725
do {
620
726
ret = gnutls_handshake(session);
727
if(quit_now){
728
goto mandos_end;
729
}
621
730
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
622
731
623
732
if(ret != GNUTLS_E_SUCCESS){
625
734
fprintf(stderr, "*** GnuTLS Handshake failed ***\n");
626
735
gnutls_perror(ret);
627
736
}
628
retval = -1;
629
737
goto mandos_end;
630
738
}
631
739
632
740
/* Read OpenPGP packet that contains the wanted password */
633
741
634
742
if(debug){
635
fprintf(stderr, "Retrieving pgp encrypted password from %s\n",
743
fprintf(stderr, "Retrieving OpenPGP encrypted password from %s\n",
636
744
ip);
637
745
}
638
746
639
747
while(true){
640
buffer_capacity = adjustbuffer(&buffer, buffer_length,
748
749
if(quit_now){
750
goto mandos_end;
751
}
752
753
buffer_capacity = incbuffer(&buffer, buffer_length,
641
754
buffer_capacity);
642
755
if(buffer_capacity == 0){
643
perror("adjustbuffer");
644
retval = -1;
756
perror("incbuffer");
757
goto mandos_end;
758
}
759
760
if(quit_now){
645
761
goto mandos_end;
646
762
}
647
763
656
772
case GNUTLS_E_AGAIN:
657
773
break;
658
774
case GNUTLS_E_REHANDSHAKE:
659
do{
775
do {
660
776
ret = gnutls_handshake(session);
777
778
if(quit_now){
779
goto mandos_end;
780
}
661
781
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
662
782
if(ret < 0){
663
783
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
664
784
gnutls_perror(ret);
665
retval = -1;
666
785
goto mandos_end;
667
786
}
668
787
break;
669
788
default:
670
789
fprintf(stderr, "Unknown error while reading data from"
671
790
" encrypted session with Mandos server\n");
672
retval = -1;
673
791
gnutls_bye(session, GNUTLS_SHUT_RDWR);
674
792
goto mandos_end;
675
793
}
682
800
fprintf(stderr, "Closing TLS session\n");
683
801
}
684
802
685
gnutls_bye(session, GNUTLS_SHUT_RDWR);
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);
686
813
687
814
if(buffer_length > 0){
688
decrypted_buffer_size = pgp_packet_decrypt(mc, buffer,
815
ssize_t decrypted_buffer_size;
816
decrypted_buffer_size = pgp_packet_decrypt(buffer,
689
817
buffer_length,
690
818
&decrypted_buffer);
691
819
if(decrypted_buffer_size >= 0){
820
692
821
written = 0;
693
822
while(written < (size_t) decrypted_buffer_size){
823
if(quit_now){
824
goto mandos_end;
825
}
826
694
827
ret = (int)fwrite(decrypted_buffer + written, 1,
695
828
(size_t)decrypted_buffer_size - written,
696
829
stdout);
699
832
fprintf(stderr, "Error writing encrypted data: %s\n",
700
833
strerror(errno));
701
834
}
702
retval = -1;
703
break;
835
goto mandos_end;
704
836
}
705
837
written += (size_t)ret;
706
838
}
707
free(decrypted_buffer);
708
} else {
709
retval = -1;
839
retval = 0;
710
840
}
711
} else {
712
retval = -1;
713
841
}
714
842
715
843
/* Shutdown procedure */
716
844
717
845
mandos_end:
846
free(decrypted_buffer);
718
847
free(buffer);
719
ret = (int)TEMP_FAILURE_RETRY(close(tcp_sd));
848
if(tcp_sd >= 0){
849
ret = (int)TEMP_FAILURE_RETRY(close(tcp_sd));
850
}
720
851
if(ret == -1){
721
852
perror("close");
722
853
}
723
854
gnutls_deinit(session);
855
if(quit_now){
856
retval = -1;
857
}
724
858
return retval;
725
859
}
726
860
727
861
static void resolve_callback(AvahiSServiceResolver *r,
728
862
AvahiIfIndex interface,
729
AVAHI_GCC_UNUSED AvahiProtocol protocol,
863
AvahiProtocol proto,
730
864
AvahiResolverEvent event,
731
865
const char *name,
732
866
const char *type,
737
871
AVAHI_GCC_UNUSED AvahiStringList *txt,
738
872
AVAHI_GCC_UNUSED AvahiLookupResultFlags
739
873
flags,
740
void* userdata){
741
mandos_context *mc = userdata;
874
AVAHI_GCC_UNUSED void* userdata){
742
875
assert(r);
743
876
744
877
/* Called whenever a service has been resolved successfully or
745
878
timed out */
746
879
880
if(quit_now){
881
return;
882
}
883
747
884
switch(event){
748
885
default:
749
886
case AVAHI_RESOLVER_FAILURE:
750
887
fprintf(stderr, "(Avahi Resolver) Failed to resolve service '%s'"
751
888
" of type '%s' in domain '%s': %s\n", name, type, domain,
752
avahi_strerror(avahi_server_errno(mc->server)));
889
avahi_strerror(avahi_server_errno(mc.server)));
753
890
break;
754
891
755
892
case AVAHI_RESOLVER_FOUND:
761
898
PRIdMAX ") on port %" PRIu16 "\n", name, host_name,
762
899
ip, (intmax_t)interface, port);
763
900
}
764
int ret = start_mandos_communication(ip, port, interface, mc);
901
int ret = start_mandos_communication(ip, port, interface,
902
avahi_proto_to_af(proto));
765
903
if(ret == 0){
766
avahi_simple_poll_quit(mc->simple_poll);
904
avahi_simple_poll_quit(mc.simple_poll);
767
905
}
768
906
}
769
907
}
779
917
const char *domain,
780
918
AVAHI_GCC_UNUSED AvahiLookupResultFlags
781
919
flags,
782
void* userdata){
783
mandos_context *mc = userdata;
920
AVAHI_GCC_UNUSED void* userdata){
784
921
assert(b);
785
922
786
923
/* Called whenever a new services becomes available on the LAN or
787
924
is removed from the LAN */
788
925
926
if(quit_now){
927
return;
928
}
929
789
930
switch(event){
790
931
default:
791
932
case AVAHI_BROWSER_FAILURE:
792
933
793
934
fprintf(stderr, "(Avahi browser) %s\n",
794
avahi_strerror(avahi_server_errno(mc->server)));
795
avahi_simple_poll_quit(mc->simple_poll);
935
avahi_strerror(avahi_server_errno(mc.server)));
936
avahi_simple_poll_quit(mc.simple_poll);
796
937
return;
797
938
798
939
case AVAHI_BROWSER_NEW:
801
942
the callback function is called the Avahi server will free the
802
943
resolver for us. */
803
944
804
if(!(avahi_s_service_resolver_new(mc->server, interface,
805
protocol, name, type, domain,
806
AVAHI_PROTO_INET6, 0,
807
resolve_callback, mc)))
945
if(avahi_s_service_resolver_new(mc.server, interface, protocol,
946
name, type, domain, protocol, 0,
947
resolve_callback, NULL) == NULL)
808
948
fprintf(stderr, "Avahi: Failed to resolve service '%s': %s\n",
809
name, avahi_strerror(avahi_server_errno(mc->server)));
949
name, avahi_strerror(avahi_server_errno(mc.server)));
810
950
break;
811
951
812
952
case AVAHI_BROWSER_REMOVE:
821
961
}
822
962
}
823
963
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
824
978
int main(int argc, char *argv[]){
825
979
AvahiSServiceBrowser *sb = NULL;
826
980
int error;
827
981
int ret;
828
982
intmax_t tmpmax;
829
int numchars;
983
char *tmp;
830
984
int exitcode = EXIT_SUCCESS;
831
985
const char *interface = "eth0";
832
986
struct ifreq network;
833
int sd;
987
int sd = -1;
988
bool take_down_interface = false;
834
989
uid_t uid;
835
990
gid_t gid;
836
991
char *connect_to = NULL;
840
995
const char *seckey = PATHDIR "/" SECKEY;
841
996
const char *pubkey = PATHDIR "/" PUBKEY;
842
997
843
mandos_context mc = { .simple_poll = NULL, .server = NULL,
844
.dh_bits = 1024, .priority = "SECURE256"
845
":!CTYPE-X.509:+CTYPE-OPENPGP" };
846
998
bool gnutls_initialized = false;
847
999
bool gpgme_initialized = false;
848
double delay = 2.5;
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
}
849
1025
850
1026
{
851
1027
struct argp_option options[] = {
857
1033
.group = 1 },
858
1034
{ .name = "interface", .key = 'i',
859
1035
.arg = "NAME",
860
.doc = "Interface that will be used to search for Mandos"
861
" servers",
1036
.doc = "Network interface that will be used to search for"
1037
" Mandos servers",
862
1038
.group = 1 },
863
1039
{ .name = "seckey", .key = 's',
864
1040
.arg = "FILE",
881
1057
.arg = "SECONDS",
882
1058
.doc = "Maximum delay to wait for interface startup",
883
1059
.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 },
884
1069
{ .name = NULL }
885
1070
};
886
1071
887
1072
error_t parse_opt(int key, char *arg,
888
1073
struct argp_state *state){
1074
errno = 0;
889
1075
switch(key){
890
1076
case 128: /* --debug */
891
1077
debug = true;
903
1089
pubkey = arg;
904
1090
break;
905
1091
case 129: /* --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);
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");
911
1097
}
912
1098
mc.dh_bits = (typeof(mc.dh_bits))tmpmax;
913
1099
break;
915
1101
mc.priority = arg;
916
1102
break;
917
1103
case 131: /* --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);
1104
errno = 0;
1105
delay = strtof(arg, &tmp);
1106
if(errno != 0 or tmp == arg or *tmp != '\0'){
1107
argp_error(state, "Bad delay");
922
1108
}
923
1109
break;
924
case ARGP_KEY_ARG:
925
argp_usage(state);
926
case ARGP_KEY_END:
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);
927
1123
break;
928
1124
default:
929
1125
return ARGP_ERR_UNKNOWN;
930
1126
}
931
return 0;
1127
return errno;
932
1128
}
933
1129
934
1130
struct argp argp = { .options = options, .parser = parse_opt,
935
1131
.args_doc = "",
936
1132
.doc = "Mandos client -- Get and decrypt"
937
1133
" passwords from a Mandos server" };
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");
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");
941
1224
exitcode = EXIT_FAILURE;
942
1225
goto end;
943
1226
}
944
1227
}
945
1228
946
1229
/* If the interface is down, bring it up */
947
{
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
948
1249
#ifdef __linux__
949
1250
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
950
messages to mess up the prompt */
1251
messages about the network interface to mess up the prompt */
951
1252
ret = klogctl(8, NULL, 5);
1253
bool restore_loglevel = true;
952
1254
if(ret == -1){
1255
restore_loglevel = false;
953
1256
perror("klogctl");
954
1257
}
955
#endif
1258
#endif /* __linux__ */
956
1259
957
1260
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
958
1261
if(sd < 0){
959
1262
perror("socket");
960
1263
exitcode = EXIT_FAILURE;
961
1264
#ifdef __linux__
962
ret = klogctl(7, NULL, 0);
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);
963
1275
if(ret == -1){
964
perror("klogctl");
1276
perror("seteuid");
965
1277
}
966
#endif
967
1278
goto end;
968
1279
}
969
1280
strcpy(network.ifr_name, interface);
971
1282
if(ret == -1){
972
1283
perror("ioctl SIOCGIFFLAGS");
973
1284
#ifdef __linux__
974
ret = klogctl(7, NULL, 0);
1285
if(restore_loglevel){
1286
ret = klogctl(7, NULL, 0);
1287
if(ret == -1){
1288
perror("klogctl");
1289
}
1290
}
1291
#endif /* __linux__ */
1292
exitcode = EXIT_FAILURE;
1293
/* Lower privileges */
1294
errno = 0;
1295
ret = seteuid(uid);
975
1296
if(ret == -1){
976
perror("klogctl");
1297
perror("seteuid");
977
1298
}
978
#endif
979
exitcode = EXIT_FAILURE;
980
1299
goto end;
981
1300
}
982
1301
if((network.ifr_flags & IFF_UP) == 0){
983
1302
network.ifr_flags |= IFF_UP;
1303
take_down_interface = true;
984
1304
ret = ioctl(sd, SIOCSIFFLAGS, &network);
985
1305
if(ret == -1){
1306
take_down_interface = false;
986
1307
perror("ioctl SIOCSIFFLAGS");
987
1308
exitcode = EXIT_FAILURE;
988
1309
#ifdef __linux__
989
ret = klogctl(7, NULL, 0);
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);
990
1320
if(ret == -1){
991
perror("klogctl");
1321
perror("seteuid");
992
1322
}
993
#endif
994
1323
goto end;
995
1324
}
996
1325
}
1008
1337
perror("nanosleep");
1009
1338
}
1010
1339
}
1011
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1012
if(ret == -1){
1013
perror("close");
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
}
1014
1346
}
1015
1347
#ifdef __linux__
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);
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);
1038
1378
if(ret == -1){
1039
1379
fprintf(stderr, "init_gnutls_global failed\n");
1040
1380
exitcode = EXIT_FAILURE;
1043
1383
gnutls_initialized = true;
1044
1384
}
1045
1385
1386
if(quit_now){
1387
goto end;
1388
}
1389
1390
tempdir_created = true;
1046
1391
if(mkdtemp(tempdir) == NULL){
1392
tempdir_created = false;
1047
1393
perror("mkdtemp");
1048
1394
goto end;
1049
1395
}
1050
tempdir_created = true;
1051
1052
if(not init_gpgme(&mc, pubkey, seckey, tempdir)){
1396
1397
if(quit_now){
1398
goto end;
1399
}
1400
1401
if(not init_gpgme(pubkey, seckey, tempdir)){
1053
1402
fprintf(stderr, "init_gpgme failed\n");
1054
1403
exitcode = EXIT_FAILURE;
1055
1404
goto end;
1057
1406
gpgme_initialized = true;
1058
1407
}
1059
1408
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;
1409
if(quit_now){
1064
1410
goto end;
1065
1411
}
1066
1412
1073
1419
exitcode = EXIT_FAILURE;
1074
1420
goto end;
1075
1421
}
1422
1423
if(quit_now){
1424
goto end;
1425
}
1426
1076
1427
uint16_t port;
1077
ret = sscanf(address+1, "%" SCNdMAX "%n", &tmpmax, &numchars);
1078
if(ret < 1 or tmpmax != (uint16_t)tmpmax
1079
or address[numchars+1] != '\0'){
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){
1080
1432
fprintf(stderr, "Bad port number\n");
1081
1433
exitcode = EXIT_FAILURE;
1082
1434
goto end;
1083
1435
}
1436
1437
if(quit_now){
1438
goto end;
1439
}
1440
1084
1441
port = (uint16_t)tmpmax;
1085
1442
*address = '\0';
1086
1443
address = connect_to;
1087
ret = start_mandos_communication(address, port, if_index, &mc);
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);
1088
1457
if(ret < 0){
1089
1458
exitcode = EXIT_FAILURE;
1090
1459
} else {
1093
1462
goto end;
1094
1463
}
1095
1464
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;
1465
if(quit_now){
1108
1466
goto end;
1109
1467
}
1110
1468
1134
1492
goto end;
1135
1493
}
1136
1494
1495
if(quit_now){
1496
goto end;
1497
}
1498
1137
1499
/* Create the Avahi service browser */
1138
1500
sb = avahi_s_service_browser_new(mc.server, if_index,
1139
AVAHI_PROTO_INET6, "_mandos._tcp",
1140
NULL, 0, browse_callback, &mc);
1501
AVAHI_PROTO_UNSPEC, "_mandos._tcp",
1502
NULL, 0, browse_callback, NULL);
1141
1503
if(sb == NULL){
1142
1504
fprintf(stderr, "Failed to create service browser: %s\n",
1143
1505
avahi_strerror(avahi_server_errno(mc.server)));
1145
1507
goto end;
1146
1508
}
1147
1509
1510
if(quit_now){
1511
goto end;
1512
}
1513
1148
1514
/* Run the main loop */
1149
1515
1150
1516
if(debug){
1179
1545
gpgme_release(mc.ctx);
1180
1546
}
1181
1547
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
1182
1580
/* Removes the temp directory used by GPGME */
1183
1581
if(tempdir_created){
1184
1582
DIR *d;
1223
1621
}
1224
1622
}
1225
1623
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
1226
1643
return exitcode;
1227
1644
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0