To get this branch, use:
bzr branch
http://bzr.recompile.se/loggerhead/mandos/trunk
« back to all changes in this revision
Viewing changes to plugins.d/mandos-client.c
- browse files at revision 962
- compare with another revision
- download diff
- download tarball
- view history from revision 962
- Committer: Teddy Hogeborn
- Date: 2019-02-09 23:23:26 UTC
- Revision ID: teddy@recompile.se-20190209232326-z1z2kzpgfixz7iaj
Add support for using raw public keys in TLS (RFC 7250)
Since GnuTLS removed support for OpenPGP keys in TLS (RFC 6091), and
no other library supports it, we have to change the protocol to use
something else. We choose to use "raw public keys" (RFC 7250). Since
we still use OpenPGP keys to decrypt the secret password, this means
that each client will have two keys: One OpenPGP key and one TLS
public/private key, and the key ID of the latter key is used to
identify clients instead of the fingerprint of the OpenPGP key.
Note that this code is still compatible with GnuTLS before version
3.6.0 (when OpenPGP key support was removed). This commit merely adds
support for using raw pulic keys instead with GnuTLS 3.6.6. or later.
* DBUS-API (Signals/ClientNotFound): Change name of first parameter
from "Fingerprint" to "KeyID".
(Mandos Client Interface/Properties/KeyID): New.
* INSTALL: Document conflict with GnuTLS 3.6.0 (which removed OpenPGP
key support) up until 3.6.6, when support for raw public
keys was added. Also document new dependency of client on
"gnutls-bin" package (for certtool).
* Makefile (run-client): Depend on TLS key files, and also pass them
as arguments to client.
(keydir/tls-privkey.pem, keydir/tls-pubkey.pem): New.
(confdir/clients.conf): Add dependency on TLS public key.
(purge-client): Add removal of TLS key files.
* clients.conf ([foo]/key_id, [bar]/key_id): New.
* debian/control (Source: mandos/Build-Depends): Also allow
libgnutls30 (>= 3.6.6)
(Package: mandos/Depends): - '' -
(Package: mandos/Description): Alter description to match new
design.
(Package: mandos-client/Description): - '' -
(Package: mandos-client/Depends): Move "gnutls-bin | openssl" to
here from "Recommends".
* debian/mandos-client.README.Debian: Add --tls-privkey and
--tls-pubkey options to test
command.
* debian/mandos-client.postinst (create_key): Renamed to "create_keys"
(all callers changed),
and also create TLS key.
* debian/mandos-client.postrm (purge): Also remove TLS key files.
* intro.xml (DESCRIPTION): Describe new dual-key design.
* mandos (GnuTLS): Define different functions depending on whether
support for raw public keys is detected.
(Client.key_id): New attribute.
(ClientDBus.KeyID_dbus_property): New method.
(ProxyClient.__init__): Take new "key_id" parameter.
(ClientHandler.handle): Use key IDs when using raw public keys and
use fingerprints when using OpenPGP keys.
(ClientHandler.peer_certificate): Also handle raw public keys.
(ClientHandler.key_id): New.
(MandosServer.handle_ipc): Pass key ID over the pipe IPC. Also
check for key ID matches when looking up
clients.
(main): Default GnuTLS priority string depends on whether we are
using raw public keys or not. When unpickling clients, set
key_id if not set in the pickle.
(main/MandosDBusService.ClientNotFound): Change name of first
parameter from
"Fingerprint" to "KeyID".
* mandos-clients.conf.xml (OPTIONS): Document new "key_id" option.
(OPTIONS/secret): Mention new key ID matchning.
(EXPANSION/RUNTIME EXPANSION): Add new "key_id" option.
(EXAMPLE): - '' -
* mandos-ctl (tablewords, main/keywords): Add new "KeyID" property.
* mandos-keygen: Create TLS key files. New "--tls-keytype" (-T)
option. Alter help text to be more clear about key
types. When in password mode, also output "key_id"
option.
* mandos-keygen.xml (SYNOPSIS): Add new "--tls-keytype" (-T) option.
(DESCRIPTION): Alter to match new dual-key design.
(OVERVIEW): - '' -
(FILES): Add TLS key files.
* mandos-options.xml (priority): Document new default priority string
when using raw public keys.
* mandos.xml (NETWORK PROTOCOL): Describe new protocol using key ID.
(BUGS): Remove issue about checking expire times of OpenPGP keys,
since TLS public keys do not have expiration times.
(SECURITY/CLIENT): Alter description to match new design.
(SEE ALSO/GnuTLS): - '' -
(SEE ALSO): Add reference to RFC 7250, and alter description of when
RFC 6091 is used.
* overview.xml: Alter text to match new design.
* plugin-runner.xml (EXAMPLE): Add --tls-pubkey and --tls-privkey
options to mandos-client options.
* plugins.d/mandos-client.c: Use raw public keys when compiling with
supporting GnuTLS versions. Add new
"--tls-pubkey" and "--tls-privkey"
options (which do nothing if GnuTLS
library does not support raw public
keys). Alter text throughout to reflect
new design. Only generate new DH
parameters (based on size of OpenPGP key)
when using OpenPGP in TLS. Default
GnuTLS priority string depends on whether
we are using raw public keys or not.
* plugins.d/mandos-client.xml (SYNOPSIS): Add new "--tls-privkey" (-t)
and "--tls-pubkey" (-T)
options.
(DESCRIPTION): Describe new dual-key design.
(OPTIONS): Document new "--tls-privkey" (-t) and "--tls-pubkey" (-T)
options.
(OPTIONS/--dh-bits): No longer necessarily depends on OpenPGP key
size.
(FILES): Add default locations for TLS public and private key files.
(EXAMPLE): Use new --tls-pubkey and --tls-privkey options.
(SECURITY): Alter wording slightly to reflect new dual-key design.
(SEE ALSO/GnuTLS): Alter description to match new design.
(SEE ALSO): Add reference to RFC 7250, and alter description of when
RFC 6091 is used.
Since GnuTLS removed support for OpenPGP keys in TLS (RFC 6091), and
no other library supports it, we have to change the protocol to use
something else. We choose to use "raw public keys" (RFC 7250). Since
we still use OpenPGP keys to decrypt the secret password, this means
that each client will have two keys: One OpenPGP key and one TLS
public/private key, and the key ID of the latter key is used to
identify clients instead of the fingerprint of the OpenPGP key.
Note that this code is still compatible with GnuTLS before version
3.6.0 (when OpenPGP key support was removed). This commit merely adds
support for using raw pulic keys instead with GnuTLS 3.6.6. or later.
* DBUS-API (Signals/ClientNotFound): Change name of first parameter
from "Fingerprint" to "KeyID".
(Mandos Client Interface/Properties/KeyID): New.
* INSTALL: Document conflict with GnuTLS 3.6.0 (which removed OpenPGP
key support) up until 3.6.6, when support for raw public
keys was added. Also document new dependency of client on
"gnutls-bin" package (for certtool).
* Makefile (run-client): Depend on TLS key files, and also pass them
as arguments to client.
(keydir/tls-privkey.pem, keydir/tls-pubkey.pem): New.
(confdir/clients.conf): Add dependency on TLS public key.
(purge-client): Add removal of TLS key files.
* clients.conf ([foo]/key_id, [bar]/key_id): New.
* debian/control (Source: mandos/Build-Depends): Also allow
libgnutls30 (>= 3.6.6)
(Package: mandos/Depends): - '' -
(Package: mandos/Description): Alter description to match new
design.
(Package: mandos-client/Description): - '' -
(Package: mandos-client/Depends): Move "gnutls-bin | openssl" to
here from "Recommends".
* debian/mandos-client.README.Debian: Add --tls-privkey and
--tls-pubkey options to test
command.
* debian/mandos-client.postinst (create_key): Renamed to "create_keys"
(all callers changed),
and also create TLS key.
* debian/mandos-client.postrm (purge): Also remove TLS key files.
* intro.xml (DESCRIPTION): Describe new dual-key design.
* mandos (GnuTLS): Define different functions depending on whether
support for raw public keys is detected.
(Client.key_id): New attribute.
(ClientDBus.KeyID_dbus_property): New method.
(ProxyClient.__init__): Take new "key_id" parameter.
(ClientHandler.handle): Use key IDs when using raw public keys and
use fingerprints when using OpenPGP keys.
(ClientHandler.peer_certificate): Also handle raw public keys.
(ClientHandler.key_id): New.
(MandosServer.handle_ipc): Pass key ID over the pipe IPC. Also
check for key ID matches when looking up
clients.
(main): Default GnuTLS priority string depends on whether we are
using raw public keys or not. When unpickling clients, set
key_id if not set in the pickle.
(main/MandosDBusService.ClientNotFound): Change name of first
parameter from
"Fingerprint" to "KeyID".
* mandos-clients.conf.xml (OPTIONS): Document new "key_id" option.
(OPTIONS/secret): Mention new key ID matchning.
(EXPANSION/RUNTIME EXPANSION): Add new "key_id" option.
(EXAMPLE): - '' -
* mandos-ctl (tablewords, main/keywords): Add new "KeyID" property.
* mandos-keygen: Create TLS key files. New "--tls-keytype" (-T)
option. Alter help text to be more clear about key
types. When in password mode, also output "key_id"
option.
* mandos-keygen.xml (SYNOPSIS): Add new "--tls-keytype" (-T) option.
(DESCRIPTION): Alter to match new dual-key design.
(OVERVIEW): - '' -
(FILES): Add TLS key files.
* mandos-options.xml (priority): Document new default priority string
when using raw public keys.
* mandos.xml (NETWORK PROTOCOL): Describe new protocol using key ID.
(BUGS): Remove issue about checking expire times of OpenPGP keys,
since TLS public keys do not have expiration times.
(SECURITY/CLIENT): Alter description to match new design.
(SEE ALSO/GnuTLS): - '' -
(SEE ALSO): Add reference to RFC 7250, and alter description of when
RFC 6091 is used.
* overview.xml: Alter text to match new design.
* plugin-runner.xml (EXAMPLE): Add --tls-pubkey and --tls-privkey
options to mandos-client options.
* plugins.d/mandos-client.c: Use raw public keys when compiling with
supporting GnuTLS versions. Add new
"--tls-pubkey" and "--tls-privkey"
options (which do nothing if GnuTLS
library does not support raw public
keys). Alter text throughout to reflect
new design. Only generate new DH
parameters (based on size of OpenPGP key)
when using OpenPGP in TLS. Default
GnuTLS priority string depends on whether
we are using raw public keys or not.
* plugins.d/mandos-client.xml (SYNOPSIS): Add new "--tls-privkey" (-t)
and "--tls-pubkey" (-T)
options.
(DESCRIPTION): Describe new dual-key design.
(OPTIONS): Document new "--tls-privkey" (-t) and "--tls-pubkey" (-T)
options.
(OPTIONS/--dh-bits): No longer necessarily depends on OpenPGP key
size.
(FILES): Add default locations for TLS public and private key files.
(EXAMPLE): Use new --tls-pubkey and --tls-privkey options.
(SECURITY): Alter wording slightly to reflect new dual-key design.
(SEE ALSO/GnuTLS): Alter description to match new design.
(SEE ALSO): Add reference to RFC 7250, and alter description of when
RFC 6091 is used.
- files added:
- bugs.xml
- debian/upstream
- plugin-helpers
- files removed:
- debian/upstream-signing-key.pgp
- files modified:
- DBUS-API
added
removed
plugins.d/mandos-client.c
9
9
* "browse_callback", and parts of "main".
10
10
*
11
11
* Everything else is
12
* Copyright © 2008-2013 Teddy Hogeborn
13
* Copyright © 2008-2013 Björn Påhlsson
14
*
15
* This program is free software: you can redistribute it and/or
16
* modify it under the terms of the GNU General Public License as
17
* published by the Free Software Foundation, either version 3 of the
18
* License, or (at your option) any later version.
19
*
20
* This program is distributed in the hope that it will be useful, but
12
* Copyright © 2008-2018 Teddy Hogeborn
13
* Copyright © 2008-2018 Björn Påhlsson
14
*
15
* This file is part of Mandos.
16
*
17
* Mandos is free software: you can redistribute it and/or modify it
18
* under the terms of the GNU General Public License as published by
19
* the Free Software Foundation, either version 3 of the License, or
20
* (at your option) any later version.
21
*
22
* Mandos is distributed in the hope that it will be useful, but
21
23
* WITHOUT ANY WARRANTY; without even the implied warranty of
22
24
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
23
25
* General Public License for more details.
24
26
*
25
27
* You should have received a copy of the GNU General Public License
26
* along with this program. If not, see
27
* <http://www.gnu.org/licenses/>.
28
* along with Mandos. If not, see <http://www.gnu.org/licenses/>.
28
29
*
29
30
* Contact the authors at <mandos@recompile.se>.
30
31
*/
32
33
/* Needed by GPGME, specifically gpgme_data_seek() */
33
34
#ifndef _LARGEFILE_SOURCE
34
35
#define _LARGEFILE_SOURCE
35
#endif
36
#endif /* not _LARGEFILE_SOURCE */
36
37
#ifndef _FILE_OFFSET_BITS
37
38
#define _FILE_OFFSET_BITS 64
38
#endif
39
#endif /* not _FILE_OFFSET_BITS */
39
40
40
41
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), asprintf() */
41
42
42
43
#include <stdio.h> /* fprintf(), stderr, fwrite(),
43
stdout, ferror(), remove() */
44
stdout, ferror() */
44
45
#include <stdint.h> /* uint16_t, uint32_t, intptr_t */
45
46
#include <stddef.h> /* NULL, size_t, ssize_t */
46
47
#include <stdlib.h> /* free(), EXIT_SUCCESS, srand(),
47
48
strtof(), abort() */
48
49
#include <stdbool.h> /* bool, false, true */
49
#include <string.h> /* memset(), strcmp(), strlen(),
50
strerror(), asprintf(), strcpy() */
50
#include <string.h> /* strcmp(), strlen(), strerror(),
51
asprintf(), strncpy(), strsignal()
52
*/
51
53
#include <sys/ioctl.h> /* ioctl */
52
54
#include <sys/types.h> /* socket(), inet_pton(), sockaddr,
53
55
sockaddr_in6, PF_INET6,
57
59
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
58
60
inet_pton(), connect(),
59
61
getnameinfo() */
60
#include <fcntl.h> /* open() */
62
#include <fcntl.h> /* open(), unlinkat(), AT_REMOVEDIR */
61
63
#include <dirent.h> /* opendir(), struct dirent, readdir()
62
64
*/
63
65
#include <inttypes.h> /* PRIu16, PRIdMAX, intmax_t,
64
66
strtoimax() */
65
#include <errno.h> /* perror(), errno,
67
#include <errno.h> /* perror(), errno, EINTR, EINVAL,
68
EAI_SYSTEM, ENETUNREACH,
69
EHOSTUNREACH, ECONNREFUSED, EPROTO,
70
EIO, ENOENT, ENXIO, ENOMEM, EISDIR,
71
ENOTEMPTY,
66
72
program_invocation_short_name */
67
73
#include <time.h> /* nanosleep(), time(), sleep() */
68
74
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
73
79
*/
74
80
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
75
81
getuid(), getgid(), seteuid(),
76
setgid(), pause(), _exit() */
82
setgid(), pause(), _exit(),
83
unlinkat() */
77
84
#include <arpa/inet.h> /* inet_pton(), htons() */
78
85
#include <iso646.h> /* not, or, and */
79
86
#include <argp.h> /* struct argp_option, error_t, struct
116
123
gnutls_*
117
124
init_gnutls_session(),
118
125
GNUTLS_* */
126
#if GNUTLS_VERSION_NUMBER < 0x030600
119
127
#include <gnutls/openpgp.h>
120
128
/* gnutls_certificate_set_openpgp_key_file(),
121
129
GNUTLS_OPENPGP_FMT_BASE64 */
130
#elif GNUTLS_VERSION_NUMBER >= 0x030606
131
#include <gnutls/x509.h> /* gnutls_pkcs_encrypt_flags_t,
132
GNUTLS_PKCS_PLAIN,
133
GNUTLS_PKCS_NULL_PASSWORD */
134
#endif
122
135
123
136
/* GPGME */
124
137
#include <gpgme.h> /* All GPGME types, constants and
132
145
#define PATHDIR "/conf/conf.d/mandos"
133
146
#define SECKEY "seckey.txt"
134
147
#define PUBKEY "pubkey.txt"
148
#define TLS_PRIVKEY "tls-privkey.pem"
149
#define TLS_PUBKEY "tls-pubkey.pem"
135
150
#define HOOKDIR "/lib/mandos/network-hooks.d"
136
151
137
152
bool debug = false;
141
156
static const char sys_class_net[] = "/sys/class/net";
142
157
char *connect_to = NULL;
143
158
const char *hookdir = HOOKDIR;
159
int hookdir_fd = -1;
144
160
uid_t uid = 65534;
145
161
gid_t gid = 65534;
146
162
183
199
perror(print_text);
184
200
}
185
201
186
__attribute__((format (gnu_printf, 2, 3)))
202
__attribute__((format (gnu_printf, 2, 3), nonnull))
187
203
int fprintf_plus(FILE *stream, const char *format, ...){
188
204
va_list ap;
189
205
va_start (ap, format);
198
214
* bytes. "buffer_capacity" is how much is currently allocated,
199
215
* "buffer_length" is how much is already used.
200
216
*/
217
__attribute__((nonnull, warn_unused_result))
201
218
size_t incbuffer(char **buffer, size_t buffer_length,
202
219
size_t buffer_capacity){
203
220
if(buffer_length + BUFFER_SIZE > buffer_capacity){
216
233
}
217
234
218
235
/* Add server to set of servers to retry periodically */
236
__attribute__((nonnull, warn_unused_result))
219
237
bool add_server(const char *ip, in_port_t port, AvahiIfIndex if_index,
220
238
int af, server **current_server){
221
239
int ret;
230
248
.af = af };
231
249
if(new_server->ip == NULL){
232
250
perror_plus("strdup");
251
free(new_server);
233
252
return false;
234
253
}
235
254
ret = clock_gettime(CLOCK_MONOTONIC, &(new_server->last_seen));
236
255
if(ret == -1){
237
256
perror_plus("clock_gettime");
257
#ifdef __GNUC__
258
#pragma GCC diagnostic push
259
#pragma GCC diagnostic ignored "-Wcast-qual"
260
#endif
261
free((char *)(new_server->ip));
262
#ifdef __GNUC__
263
#pragma GCC diagnostic pop
264
#endif
265
free(new_server);
238
266
return false;
239
267
}
240
268
/* Special case of first server */
242
270
new_server->next = new_server;
243
271
new_server->prev = new_server;
244
272
*current_server = new_server;
245
/* Place the new server last in the list */
246
273
} else {
274
/* Place the new server last in the list */
247
275
new_server->next = *current_server;
248
276
new_server->prev = (*current_server)->prev;
249
277
new_server->prev->next = new_server;
252
280
return true;
253
281
}
254
282
283
/* Set effective uid to 0, return errno */
284
__attribute__((warn_unused_result))
285
int raise_privileges(void){
286
int old_errno = errno;
287
int ret = 0;
288
if(seteuid(0) == -1){
289
ret = errno;
290
}
291
errno = old_errno;
292
return ret;
293
}
294
295
/* Set effective and real user ID to 0. Return errno. */
296
__attribute__((warn_unused_result))
297
int raise_privileges_permanently(void){
298
int old_errno = errno;
299
int ret = raise_privileges();
300
if(ret != 0){
301
errno = old_errno;
302
return ret;
303
}
304
if(setuid(0) == -1){
305
ret = errno;
306
}
307
errno = old_errno;
308
return ret;
309
}
310
311
/* Set effective user ID to unprivileged saved user ID */
312
__attribute__((warn_unused_result))
313
int lower_privileges(void){
314
int old_errno = errno;
315
int ret = 0;
316
if(seteuid(uid) == -1){
317
ret = errno;
318
}
319
errno = old_errno;
320
return ret;
321
}
322
323
/* Lower privileges permanently */
324
__attribute__((warn_unused_result))
325
int lower_privileges_permanently(void){
326
int old_errno = errno;
327
int ret = 0;
328
if(setuid(uid) == -1){
329
ret = errno;
330
}
331
errno = old_errno;
332
return ret;
333
}
334
255
335
/*
256
336
* Initialize GPGME.
257
337
*/
258
static bool init_gpgme(const char *seckey, const char *pubkey,
259
const char *tempdir, mandos_context *mc){
338
__attribute__((nonnull, warn_unused_result))
339
static bool init_gpgme(const char * const seckey,
340
const char * const pubkey,
341
const char * const tempdir,
342
mandos_context *mc){
260
343
gpgme_error_t rc;
261
344
gpgme_engine_info_t engine_info;
262
345
263
346
/*
264
347
* Helper function to insert pub and seckey to the engine keyring.
265
348
*/
266
bool import_key(const char *filename){
349
bool import_key(const char * const filename){
267
350
int ret;
268
351
int fd;
269
352
gpgme_data_t pgp_data;
274
357
return false;
275
358
}
276
359
360
/* Workaround for systems without a real-time clock; see also
361
Debian bug #894495: <https://bugs.debian.org/894495> */
362
do {
363
{
364
time_t currtime = time(NULL);
365
if(currtime != (time_t)-1){
366
struct tm tm;
367
if(gmtime_r(&currtime, &tm) == NULL) {
368
perror_plus("gmtime_r");
369
break;
370
}
371
if(tm.tm_year != 70 or tm.tm_mon != 0){
372
break;
373
}
374
if(debug){
375
fprintf_plus(stderr, "System clock is January 1970");
376
}
377
} else {
378
if(debug){
379
fprintf_plus(stderr, "System clock is invalid");
380
}
381
}
382
}
383
struct stat keystat;
384
ret = fstat(fd, &keystat);
385
if(ret != 0){
386
perror_plus("fstat");
387
break;
388
}
389
ret = raise_privileges();
390
if(ret != 0){
391
errno = ret;
392
perror_plus("Failed to raise privileges");
393
break;
394
}
395
if(debug){
396
fprintf_plus(stderr,
397
"Setting system clock to key file mtime");
398
}
399
time_t keytime = keystat.st_mtim.tv_sec;
400
if(stime(&keytime) != 0){
401
perror_plus("stime");
402
}
403
ret = lower_privileges();
404
if(ret != 0){
405
errno = ret;
406
perror_plus("Failed to lower privileges");
407
}
408
} while(false);
409
277
410
rc = gpgme_data_new_from_fd(&pgp_data, fd);
278
411
if(rc != GPG_ERR_NO_ERROR){
279
412
fprintf_plus(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
287
420
gpgme_strsource(rc), gpgme_strerror(rc));
288
421
return false;
289
422
}
423
{
424
gpgme_import_result_t import_result
425
= gpgme_op_import_result(mc->ctx);
426
if((import_result->imported < 1
427
or import_result->not_imported > 0)
428
and import_result->unchanged == 0){
429
fprintf_plus(stderr, "bad gpgme_op_import_results:\n");
430
fprintf_plus(stderr,
431
"The total number of considered keys: %d\n",
432
import_result->considered);
433
fprintf_plus(stderr,
434
"The number of keys without user ID: %d\n",
435
import_result->no_user_id);
436
fprintf_plus(stderr,
437
"The total number of imported keys: %d\n",
438
import_result->imported);
439
fprintf_plus(stderr, "The number of imported RSA keys: %d\n",
440
import_result->imported_rsa);
441
fprintf_plus(stderr, "The number of unchanged keys: %d\n",
442
import_result->unchanged);
443
fprintf_plus(stderr, "The number of new user IDs: %d\n",
444
import_result->new_user_ids);
445
fprintf_plus(stderr, "The number of new sub keys: %d\n",
446
import_result->new_sub_keys);
447
fprintf_plus(stderr, "The number of new signatures: %d\n",
448
import_result->new_signatures);
449
fprintf_plus(stderr, "The number of new revocations: %d\n",
450
import_result->new_revocations);
451
fprintf_plus(stderr,
452
"The total number of secret keys read: %d\n",
453
import_result->secret_read);
454
fprintf_plus(stderr,
455
"The number of imported secret keys: %d\n",
456
import_result->secret_imported);
457
fprintf_plus(stderr,
458
"The number of unchanged secret keys: %d\n",
459
import_result->secret_unchanged);
460
fprintf_plus(stderr, "The number of keys not imported: %d\n",
461
import_result->not_imported);
462
for(gpgme_import_status_t import_status
463
= import_result->imports;
464
import_status != NULL;
465
import_status = import_status->next){
466
fprintf_plus(stderr, "Import status for key: %s\n",
467
import_status->fpr);
468
if(import_status->result != GPG_ERR_NO_ERROR){
469
fprintf_plus(stderr, "Import result: %s: %s\n",
470
gpgme_strsource(import_status->result),
471
gpgme_strerror(import_status->result));
472
}
473
fprintf_plus(stderr, "Key status:\n");
474
fprintf_plus(stderr,
475
import_status->status & GPGME_IMPORT_NEW
476
? "The key was new.\n"
477
: "The key was not new.\n");
478
fprintf_plus(stderr,
479
import_status->status & GPGME_IMPORT_UID
480
? "The key contained new user IDs.\n"
481
: "The key did not contain new user IDs.\n");
482
fprintf_plus(stderr,
483
import_status->status & GPGME_IMPORT_SIG
484
? "The key contained new signatures.\n"
485
: "The key did not contain new signatures.\n");
486
fprintf_plus(stderr,
487
import_status->status & GPGME_IMPORT_SUBKEY
488
? "The key contained new sub keys.\n"
489
: "The key did not contain new sub keys.\n");
490
fprintf_plus(stderr,
491
import_status->status & GPGME_IMPORT_SECRET
492
? "The key contained a secret key.\n"
493
: "The key did not contain a secret key.\n");
494
}
495
return false;
496
}
497
}
290
498
291
ret = (int)TEMP_FAILURE_RETRY(close(fd));
499
ret = close(fd);
292
500
if(ret == -1){
293
501
perror_plus("close");
294
502
}
333
541
/* Create new GPGME "context" */
334
542
rc = gpgme_new(&(mc->ctx));
335
543
if(rc != GPG_ERR_NO_ERROR){
336
fprintf_plus(stderr, "Mandos plugin mandos-client: "
337
"bad gpgme_new: %s: %s\n", gpgme_strsource(rc),
338
gpgme_strerror(rc));
544
fprintf_plus(stderr, "bad gpgme_new: %s: %s\n",
545
gpgme_strsource(rc), gpgme_strerror(rc));
339
546
return false;
340
547
}
341
548
350
557
* Decrypt OpenPGP data.
351
558
* Returns -1 on error
352
559
*/
560
__attribute__((nonnull, warn_unused_result))
353
561
static ssize_t pgp_packet_decrypt(const char *cryptotext,
354
562
size_t crypto_size,
355
563
char **plaintext,
376
584
/* Create new empty GPGME data buffer for the plaintext */
377
585
rc = gpgme_data_new(&dh_plain);
378
586
if(rc != GPG_ERR_NO_ERROR){
379
fprintf_plus(stderr, "Mandos plugin mandos-client: "
380
"bad gpgme_data_new: %s: %s\n",
587
fprintf_plus(stderr, "bad gpgme_data_new: %s: %s\n",
381
588
gpgme_strsource(rc), gpgme_strerror(rc));
382
589
gpgme_data_release(dh_crypto);
383
590
return -1;
396
603
if(result == NULL){
397
604
fprintf_plus(stderr, "gpgme_op_decrypt_result failed\n");
398
605
} else {
399
fprintf_plus(stderr, "Unsupported algorithm: %s\n",
400
result->unsupported_algorithm);
401
fprintf_plus(stderr, "Wrong key usage: %u\n",
402
result->wrong_key_usage);
606
if(result->unsupported_algorithm != NULL) {
607
fprintf_plus(stderr, "Unsupported algorithm: %s\n",
608
result->unsupported_algorithm);
609
}
610
fprintf_plus(stderr, "Wrong key usage: %s\n",
611
result->wrong_key_usage ? "Yes" : "No");
403
612
if(result->file_name != NULL){
404
613
fprintf_plus(stderr, "File name: %s\n", result->file_name);
405
614
}
406
gpgme_recipient_t recipient;
407
recipient = result->recipients;
408
while(recipient != NULL){
615
616
for(gpgme_recipient_t r = result->recipients; r != NULL;
617
r = r->next){
409
618
fprintf_plus(stderr, "Public key algorithm: %s\n",
410
gpgme_pubkey_algo_name
411
(recipient->pubkey_algo));
412
fprintf_plus(stderr, "Key ID: %s\n", recipient->keyid);
619
gpgme_pubkey_algo_name(r->pubkey_algo));
620
fprintf_plus(stderr, "Key ID: %s\n", r->keyid);
413
621
fprintf_plus(stderr, "Secret key available: %s\n",
414
recipient->status == GPG_ERR_NO_SECKEY
415
? "No" : "Yes");
416
recipient = recipient->next;
622
r->status == GPG_ERR_NO_SECKEY ? "No" : "Yes");
417
623
}
418
624
}
419
625
}
475
681
return plaintext_length;
476
682
}
477
683
478
static const char * safer_gnutls_strerror(int value){
684
__attribute__((warn_unused_result, const))
685
static const char *safe_string(const char *str){
686
if(str == NULL)
687
return "(unknown)";
688
return str;
689
}
690
691
__attribute__((warn_unused_result))
692
static const char *safer_gnutls_strerror(int value){
479
693
const char *ret = gnutls_strerror(value);
480
if(ret == NULL)
481
ret = "(unknown)";
482
return ret;
694
return safe_string(ret);
483
695
}
484
696
485
697
/* GnuTLS log function callback */
698
__attribute__((nonnull))
486
699
static void debuggnutls(__attribute__((unused)) int level,
487
700
const char* string){
488
701
fprintf_plus(stderr, "GnuTLS: %s", string);
489
702
}
490
703
704
__attribute__((nonnull(1, 2, 4), warn_unused_result))
491
705
static int init_gnutls_global(const char *pubkeyfilename,
492
706
const char *seckeyfilename,
707
const char *dhparamsfilename,
493
708
mandos_context *mc){
494
709
int ret;
495
710
497
712
fprintf_plus(stderr, "Initializing GnuTLS\n");
498
713
}
499
714
500
ret = gnutls_global_init();
501
if(ret != GNUTLS_E_SUCCESS){
502
fprintf_plus(stderr, "GnuTLS global_init: %s\n",
503
safer_gnutls_strerror(ret));
504
return -1;
505
}
506
507
715
if(debug){
508
716
/* "Use a log level over 10 to enable all debugging options."
509
717
* - GnuTLS manual
517
725
if(ret != GNUTLS_E_SUCCESS){
518
726
fprintf_plus(stderr, "GnuTLS memory error: %s\n",
519
727
safer_gnutls_strerror(ret));
520
gnutls_global_deinit();
521
728
return -1;
522
729
}
523
730
524
731
if(debug){
525
fprintf_plus(stderr, "Attempting to use OpenPGP public key %s and"
526
" secret key %s as GnuTLS credentials\n",
732
fprintf_plus(stderr, "Attempting to use public key %s and"
733
" private key %s as GnuTLS credentials\n",
527
734
pubkeyfilename,
528
735
seckeyfilename);
529
736
}
530
737
738
#if GNUTLS_VERSION_NUMBER >= 0x030606
739
ret = gnutls_certificate_set_rawpk_key_file
740
(mc->cred, pubkeyfilename, seckeyfilename,
741
GNUTLS_X509_FMT_PEM, /* format */
742
NULL, /* pass */
743
/* key_usage */
744
GNUTLS_KEY_DIGITAL_SIGNATURE | GNUTLS_KEY_KEY_ENCIPHERMENT,
745
NULL, /* names */
746
0, /* names_length */
747
/* privkey_flags */
748
GNUTLS_PKCS_PLAIN | GNUTLS_PKCS_NULL_PASSWORD,
749
0); /* pkcs11_flags */
750
#elif GNUTLS_VERSION_NUMBER < 0x030600
531
751
ret = gnutls_certificate_set_openpgp_key_file
532
752
(mc->cred, pubkeyfilename, seckeyfilename,
533
753
GNUTLS_OPENPGP_FMT_BASE64);
754
#else
755
#error "Needs GnuTLS 3.6.6 or later, or before 3.6.0"
756
#endif
534
757
if(ret != GNUTLS_E_SUCCESS){
535
758
fprintf_plus(stderr,
536
"Error[%d] while reading the OpenPGP key pair ('%s',"
759
"Error[%d] while reading the key pair ('%s',"
537
760
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
538
761
fprintf_plus(stderr, "The GnuTLS error is: %s\n",
539
762
safer_gnutls_strerror(ret));
548
771
safer_gnutls_strerror(ret));
549
772
goto globalfail;
550
773
}
551
ret = gnutls_dh_params_generate2(mc->dh_params, mc->dh_bits);
552
if(ret != GNUTLS_E_SUCCESS){
553
fprintf_plus(stderr, "Error in GnuTLS prime generation: %s\n",
554
safer_gnutls_strerror(ret));
555
goto globalfail;
556
}
557
558
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
774
/* If a Diffie-Hellman parameters file was given, try to use it */
775
if(dhparamsfilename != NULL){
776
gnutls_datum_t params = { .data = NULL, .size = 0 };
777
do {
778
int dhpfile = open(dhparamsfilename, O_RDONLY);
779
if(dhpfile == -1){
780
perror_plus("open");
781
dhparamsfilename = NULL;
782
break;
783
}
784
size_t params_capacity = 0;
785
while(true){
786
params_capacity = incbuffer((char **)¶ms.data,
787
(size_t)params.size,
788
(size_t)params_capacity);
789
if(params_capacity == 0){
790
perror_plus("incbuffer");
791
free(params.data);
792
params.data = NULL;
793
dhparamsfilename = NULL;
794
break;
795
}
796
ssize_t bytes_read = read(dhpfile,
797
params.data + params.size,
798
BUFFER_SIZE);
799
/* EOF */
800
if(bytes_read == 0){
801
break;
802
}
803
/* check bytes_read for failure */
804
if(bytes_read < 0){
805
perror_plus("read");
806
free(params.data);
807
params.data = NULL;
808
dhparamsfilename = NULL;
809
break;
810
}
811
params.size += (unsigned int)bytes_read;
812
}
813
ret = close(dhpfile);
814
if(ret == -1){
815
perror_plus("close");
816
}
817
if(params.data == NULL){
818
dhparamsfilename = NULL;
819
}
820
if(dhparamsfilename == NULL){
821
break;
822
}
823
ret = gnutls_dh_params_import_pkcs3(mc->dh_params, ¶ms,
824
GNUTLS_X509_FMT_PEM);
825
if(ret != GNUTLS_E_SUCCESS){
826
fprintf_plus(stderr, "Failed to parse DH parameters in file"
827
" \"%s\": %s\n", dhparamsfilename,
828
safer_gnutls_strerror(ret));
829
dhparamsfilename = NULL;
830
}
831
free(params.data);
832
} while(false);
833
}
834
if(dhparamsfilename == NULL){
835
if(mc->dh_bits == 0){
836
#if GNUTLS_VERSION_NUMBER < 0x030600
837
/* Find out the optimal number of DH bits */
838
/* Try to read the private key file */
839
gnutls_datum_t buffer = { .data = NULL, .size = 0 };
840
do {
841
int secfile = open(seckeyfilename, O_RDONLY);
842
if(secfile == -1){
843
perror_plus("open");
844
break;
845
}
846
size_t buffer_capacity = 0;
847
while(true){
848
buffer_capacity = incbuffer((char **)&buffer.data,
849
(size_t)buffer.size,
850
(size_t)buffer_capacity);
851
if(buffer_capacity == 0){
852
perror_plus("incbuffer");
853
free(buffer.data);
854
buffer.data = NULL;
855
break;
856
}
857
ssize_t bytes_read = read(secfile,
858
buffer.data + buffer.size,
859
BUFFER_SIZE);
860
/* EOF */
861
if(bytes_read == 0){
862
break;
863
}
864
/* check bytes_read for failure */
865
if(bytes_read < 0){
866
perror_plus("read");
867
free(buffer.data);
868
buffer.data = NULL;
869
break;
870
}
871
buffer.size += (unsigned int)bytes_read;
872
}
873
close(secfile);
874
} while(false);
875
/* If successful, use buffer to parse private key */
876
gnutls_sec_param_t sec_param = GNUTLS_SEC_PARAM_ULTRA;
877
if(buffer.data != NULL){
878
{
879
gnutls_openpgp_privkey_t privkey = NULL;
880
ret = gnutls_openpgp_privkey_init(&privkey);
881
if(ret != GNUTLS_E_SUCCESS){
882
fprintf_plus(stderr, "Error initializing OpenPGP key"
883
" structure: %s",
884
safer_gnutls_strerror(ret));
885
free(buffer.data);
886
buffer.data = NULL;
887
} else {
888
ret = gnutls_openpgp_privkey_import
889
(privkey, &buffer, GNUTLS_OPENPGP_FMT_BASE64, "", 0);
890
if(ret != GNUTLS_E_SUCCESS){
891
fprintf_plus(stderr, "Error importing OpenPGP key : %s",
892
safer_gnutls_strerror(ret));
893
privkey = NULL;
894
}
895
free(buffer.data);
896
buffer.data = NULL;
897
if(privkey != NULL){
898
/* Use private key to suggest an appropriate
899
sec_param */
900
sec_param = gnutls_openpgp_privkey_sec_param(privkey);
901
gnutls_openpgp_privkey_deinit(privkey);
902
if(debug){
903
fprintf_plus(stderr, "This OpenPGP key implies using"
904
" a GnuTLS security parameter \"%s\".\n",
905
safe_string(gnutls_sec_param_get_name
906
(sec_param)));
907
}
908
}
909
}
910
}
911
if(sec_param == GNUTLS_SEC_PARAM_UNKNOWN){
912
/* Err on the side of caution */
913
sec_param = GNUTLS_SEC_PARAM_ULTRA;
914
if(debug){
915
fprintf_plus(stderr, "Falling back to security parameter"
916
" \"%s\"\n",
917
safe_string(gnutls_sec_param_get_name
918
(sec_param)));
919
}
920
}
921
}
922
unsigned int uret = gnutls_sec_param_to_pk_bits(GNUTLS_PK_DH, sec_param);
923
if(uret != 0){
924
mc->dh_bits = uret;
925
if(debug){
926
fprintf_plus(stderr, "A \"%s\" GnuTLS security parameter"
927
" implies %u DH bits; using that.\n",
928
safe_string(gnutls_sec_param_get_name
929
(sec_param)),
930
mc->dh_bits);
931
}
932
} else {
933
fprintf_plus(stderr, "Failed to get implied number of DH"
934
" bits for security parameter \"%s\"): %s\n",
935
safe_string(gnutls_sec_param_get_name
936
(sec_param)),
937
safer_gnutls_strerror(ret));
938
goto globalfail;
939
}
940
#endif
941
} else { /* dh_bits != 0 */
942
if(debug){
943
fprintf_plus(stderr, "DH bits explicitly set to %u\n",
944
mc->dh_bits);
945
}
946
ret = gnutls_dh_params_generate2(mc->dh_params, mc->dh_bits);
947
if(ret != GNUTLS_E_SUCCESS){
948
fprintf_plus(stderr, "Error in GnuTLS prime generation (%u"
949
" bits): %s\n", mc->dh_bits,
950
safer_gnutls_strerror(ret));
951
goto globalfail;
952
}
953
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
954
}
955
}
559
956
560
957
return 0;
561
958
562
959
globalfail:
563
960
564
961
gnutls_certificate_free_credentials(mc->cred);
565
gnutls_global_deinit();
566
962
gnutls_dh_params_deinit(mc->dh_params);
567
963
return -1;
568
964
}
569
965
966
__attribute__((nonnull, warn_unused_result))
570
967
static int init_gnutls_session(gnutls_session_t *session,
571
968
mandos_context *mc){
572
969
int ret;
573
970
/* GnuTLS session creation */
574
971
do {
575
ret = gnutls_init(session, GNUTLS_SERVER);
972
ret = gnutls_init(session, (GNUTLS_SERVER
973
#if GNUTLS_VERSION_NUMBER >= 0x030506
974
| GNUTLS_NO_TICKETS
975
#endif
976
#if GNUTLS_VERSION_NUMBER >= 0x030606
977
| GNUTLS_ENABLE_RAWPK
978
#endif
979
));
576
980
if(quit_now){
577
981
return -1;
578
982
}
619
1023
/* ignore client certificate if any. */
620
1024
gnutls_certificate_server_set_request(*session, GNUTLS_CERT_IGNORE);
621
1025
622
gnutls_dh_set_prime_bits(*session, mc->dh_bits);
623
624
1026
return 0;
625
1027
}
626
1028
628
1030
static void empty_log(__attribute__((unused)) AvahiLogLevel level,
629
1031
__attribute__((unused)) const char *txt){}
630
1032
1033
/* Helper function to add_local_route() and delete_local_route() */
1034
__attribute__((nonnull, warn_unused_result))
1035
static bool add_delete_local_route(const bool add,
1036
const char *address,
1037
AvahiIfIndex if_index){
1038
int ret;
1039
char helper[] = "mandos-client-iprouteadddel";
1040
char add_arg[] = "add";
1041
char delete_arg[] = "delete";
1042
char debug_flag[] = "--debug";
1043
char *pluginhelperdir = getenv("MANDOSPLUGINHELPERDIR");
1044
if(pluginhelperdir == NULL){
1045
if(debug){
1046
fprintf_plus(stderr, "MANDOSPLUGINHELPERDIR environment"
1047
" variable not set; cannot run helper\n");
1048
}
1049
return false;
1050
}
1051
1052
char interface[IF_NAMESIZE];
1053
if(if_indextoname((unsigned int)if_index, interface) == NULL){
1054
perror_plus("if_indextoname");
1055
return false;
1056
}
1057
1058
int devnull = (int)TEMP_FAILURE_RETRY(open("/dev/null", O_RDONLY));
1059
if(devnull == -1){
1060
perror_plus("open(\"/dev/null\", O_RDONLY)");
1061
return false;
1062
}
1063
pid_t pid = fork();
1064
if(pid == 0){
1065
/* Child */
1066
/* Raise privileges */
1067
errno = raise_privileges_permanently();
1068
if(errno != 0){
1069
perror_plus("Failed to raise privileges");
1070
/* _exit(EX_NOPERM); */
1071
} else {
1072
/* Set group */
1073
errno = 0;
1074
ret = setgid(0);
1075
if(ret == -1){
1076
perror_plus("setgid");
1077
_exit(EX_NOPERM);
1078
}
1079
/* Reset supplementary groups */
1080
errno = 0;
1081
ret = setgroups(0, NULL);
1082
if(ret == -1){
1083
perror_plus("setgroups");
1084
_exit(EX_NOPERM);
1085
}
1086
}
1087
ret = dup2(devnull, STDIN_FILENO);
1088
if(ret == -1){
1089
perror_plus("dup2(devnull, STDIN_FILENO)");
1090
_exit(EX_OSERR);
1091
}
1092
ret = close(devnull);
1093
if(ret == -1){
1094
perror_plus("close");
1095
_exit(EX_OSERR);
1096
}
1097
ret = dup2(STDERR_FILENO, STDOUT_FILENO);
1098
if(ret == -1){
1099
perror_plus("dup2(STDERR_FILENO, STDOUT_FILENO)");
1100
_exit(EX_OSERR);
1101
}
1102
int helperdir_fd = (int)TEMP_FAILURE_RETRY(open(pluginhelperdir,
1103
O_RDONLY
1104
| O_DIRECTORY
1105
| O_PATH
1106
| O_CLOEXEC));
1107
if(helperdir_fd == -1){
1108
perror_plus("open");
1109
_exit(EX_UNAVAILABLE);
1110
}
1111
int helper_fd = (int)TEMP_FAILURE_RETRY(openat(helperdir_fd,
1112
helper, O_RDONLY));
1113
if(helper_fd == -1){
1114
perror_plus("openat");
1115
close(helperdir_fd);
1116
_exit(EX_UNAVAILABLE);
1117
}
1118
close(helperdir_fd);
1119
#ifdef __GNUC__
1120
#pragma GCC diagnostic push
1121
#pragma GCC diagnostic ignored "-Wcast-qual"
1122
#endif
1123
if(fexecve(helper_fd, (char *const [])
1124
{ helper, add ? add_arg : delete_arg, (char *)address,
1125
interface, debug ? debug_flag : NULL, NULL },
1126
environ) == -1){
1127
#ifdef __GNUC__
1128
#pragma GCC diagnostic pop
1129
#endif
1130
perror_plus("fexecve");
1131
_exit(EXIT_FAILURE);
1132
}
1133
}
1134
if(pid == -1){
1135
perror_plus("fork");
1136
return false;
1137
}
1138
int status;
1139
pid_t pret = -1;
1140
errno = 0;
1141
do {
1142
pret = waitpid(pid, &status, 0);
1143
if(pret == -1 and errno == EINTR and quit_now){
1144
int errno_raising = 0;
1145
if((errno = raise_privileges()) != 0){
1146
errno_raising = errno;
1147
perror_plus("Failed to raise privileges in order to"
1148
" kill helper program");
1149
}
1150
if(kill(pid, SIGTERM) == -1){
1151
perror_plus("kill");
1152
}
1153
if((errno_raising == 0) and (errno = lower_privileges()) != 0){
1154
perror_plus("Failed to lower privileges after killing"
1155
" helper program");
1156
}
1157
return false;
1158
}
1159
} while(pret == -1 and errno == EINTR);
1160
if(pret == -1){
1161
perror_plus("waitpid");
1162
return false;
1163
}
1164
if(WIFEXITED(status)){
1165
if(WEXITSTATUS(status) != 0){
1166
fprintf_plus(stderr, "Error: iprouteadddel exited"
1167
" with status %d\n", WEXITSTATUS(status));
1168
return false;
1169
}
1170
return true;
1171
}
1172
if(WIFSIGNALED(status)){
1173
fprintf_plus(stderr, "Error: iprouteadddel died by"
1174
" signal %d\n", WTERMSIG(status));
1175
return false;
1176
}
1177
fprintf_plus(stderr, "Error: iprouteadddel crashed\n");
1178
return false;
1179
}
1180
1181
__attribute__((nonnull, warn_unused_result))
1182
static bool add_local_route(const char *address,
1183
AvahiIfIndex if_index){
1184
if(debug){
1185
fprintf_plus(stderr, "Adding route to %s\n", address);
1186
}
1187
return add_delete_local_route(true, address, if_index);
1188
}
1189
1190
__attribute__((nonnull, warn_unused_result))
1191
static bool delete_local_route(const char *address,
1192
AvahiIfIndex if_index){
1193
if(debug){
1194
fprintf_plus(stderr, "Removing route to %s\n", address);
1195
}
1196
return add_delete_local_route(false, address, if_index);
1197
}
1198
631
1199
/* Called when a Mandos server is found */
1200
__attribute__((nonnull, warn_unused_result))
632
1201
static int start_mandos_communication(const char *ip, in_port_t port,
633
1202
AvahiIfIndex if_index,
634
1203
int af, mandos_context *mc){
643
1212
int retval = -1;
644
1213
gnutls_session_t session;
645
1214
int pf; /* Protocol family */
1215
bool route_added = false;
646
1216
647
1217
errno = 0;
648
1218
670
1240
bool match = false;
671
1241
{
672
1242
char *interface = NULL;
673
while((interface=argz_next(mc->interfaces, mc->interfaces_size,
674
interface))){
1243
while((interface = argz_next(mc->interfaces,
1244
mc->interfaces_size,
1245
interface))){
675
1246
if(if_nametoindex(interface) == (unsigned int)if_index){
676
1247
match = true;
677
1248
break;
706
1277
PRIuMAX "\n", ip, (uintmax_t)port);
707
1278
}
708
1279
709
tcp_sd = socket(pf, SOCK_STREAM, 0);
1280
tcp_sd = socket(pf, SOCK_STREAM | SOCK_CLOEXEC, 0);
710
1281
if(tcp_sd < 0){
711
1282
int e = errno;
712
1283
perror_plus("socket");
719
1290
goto mandos_end;
720
1291
}
721
1292
722
memset(&to, 0, sizeof(to));
723
1293
if(af == AF_INET6){
724
((struct sockaddr_in6 *)&to)->sin6_family = (sa_family_t)af;
725
ret = inet_pton(af, ip, &((struct sockaddr_in6 *)&to)->sin6_addr);
1294
struct sockaddr_in6 *to6 = (struct sockaddr_in6 *)&to;
1295
*to6 = (struct sockaddr_in6){ .sin6_family = (sa_family_t)af };
1296
ret = inet_pton(af, ip, &to6->sin6_addr);
726
1297
} else { /* IPv4 */
727
((struct sockaddr_in *)&to)->sin_family = (sa_family_t)af;
728
ret = inet_pton(af, ip, &((struct sockaddr_in *)&to)->sin_addr);
1298
struct sockaddr_in *to4 = (struct sockaddr_in *)&to;
1299
*to4 = (struct sockaddr_in){ .sin_family = (sa_family_t)af };
1300
ret = inet_pton(af, ip, &to4->sin_addr);
729
1301
}
730
1302
if(ret < 0 ){
731
1303
int e = errno;
740
1312
goto mandos_end;
741
1313
}
742
1314
if(af == AF_INET6){
743
((struct sockaddr_in6 *)&to)->sin6_port = htons(port);
1315
((struct sockaddr_in6 *)&to)->sin6_port = htons(port);
744
1316
if(IN6_IS_ADDR_LINKLOCAL
745
1317
(&((struct sockaddr_in6 *)&to)->sin6_addr)){
746
1318
if(if_index == AVAHI_IF_UNSPEC){
801
1373
goto mandos_end;
802
1374
}
803
1375
804
if(af == AF_INET6){
805
ret = connect(tcp_sd, (struct sockaddr *)&to,
806
sizeof(struct sockaddr_in6));
807
} else {
808
ret = connect(tcp_sd, (struct sockaddr *)&to, /* IPv4 */
809
sizeof(struct sockaddr_in));
810
}
811
if(ret < 0){
812
if ((errno != ECONNREFUSED and errno != ENETUNREACH) or debug){
813
int e = errno;
814
perror_plus("connect");
815
errno = e;
816
}
817
goto mandos_end;
818
}
819
820
if(quit_now){
821
errno = EINTR;
822
goto mandos_end;
1376
while(true){
1377
if(af == AF_INET6){
1378
ret = connect(tcp_sd, (struct sockaddr *)&to,
1379
sizeof(struct sockaddr_in6));
1380
} else {
1381
ret = connect(tcp_sd, (struct sockaddr *)&to, /* IPv4 */
1382
sizeof(struct sockaddr_in));
1383
}
1384
if(ret < 0){
1385
if(((errno == ENETUNREACH) or (errno == EHOSTUNREACH))
1386
and if_index != AVAHI_IF_UNSPEC
1387
and connect_to == NULL
1388
and not route_added and
1389
((af == AF_INET6 and not
1390
IN6_IS_ADDR_LINKLOCAL(&(((struct sockaddr_in6 *)
1391
&to)->sin6_addr)))
1392
or (af == AF_INET and
1393
/* Not a a IPv4LL address */
1394
(ntohl(((struct sockaddr_in *)&to)->sin_addr.s_addr)
1395
& 0xFFFF0000L) != 0xA9FE0000L))){
1396
/* Work around Avahi bug - Avahi does not announce link-local
1397
addresses if it has a global address, so local hosts with
1398
*only* a link-local address (e.g. Mandos clients) cannot
1399
connect to a Mandos server announced by Avahi on a server
1400
host with a global address. Work around this by retrying
1401
with an explicit route added with the server's address.
1402
1403
Avahi bug reference:
1404
https://lists.freedesktop.org/archives/avahi/2010-February/001833.html
1405
https://bugs.debian.org/587961
1406
*/
1407
if(debug){
1408
fprintf_plus(stderr, "Mandos server unreachable, trying"
1409
" direct route\n");
1410
}
1411
int e = errno;
1412
route_added = add_local_route(ip, if_index);
1413
if(route_added){
1414
continue;
1415
}
1416
errno = e;
1417
}
1418
if(errno != ECONNREFUSED or debug){
1419
int e = errno;
1420
perror_plus("connect");
1421
errno = e;
1422
}
1423
goto mandos_end;
1424
}
1425
1426
if(quit_now){
1427
errno = EINTR;
1428
goto mandos_end;
1429
}
1430
break;
823
1431
}
824
1432
825
1433
const char *out = mandos_protocol_version;
979
1587
&decrypted_buffer, mc);
980
1588
if(decrypted_buffer_size >= 0){
981
1589
1590
clearerr(stdout);
982
1591
written = 0;
983
1592
while(written < (size_t) decrypted_buffer_size){
984
1593
if(quit_now){
1000
1609
}
1001
1610
written += (size_t)ret;
1002
1611
}
1612
ret = fflush(stdout);
1613
if(ret != 0){
1614
int e = errno;
1615
if(debug){
1616
fprintf_plus(stderr, "Error writing encrypted data: %s\n",
1617
strerror(errno));
1618
}
1619
errno = e;
1620
goto mandos_end;
1621
}
1003
1622
retval = 0;
1004
1623
}
1005
1624
}
1008
1627
1009
1628
mandos_end:
1010
1629
{
1630
if(route_added){
1631
if(not delete_local_route(ip, if_index)){
1632
fprintf_plus(stderr, "Failed to delete local route to %s on"
1633
" interface %d", ip, if_index);
1634
}
1635
}
1011
1636
int e = errno;
1012
1637
free(decrypted_buffer);
1013
1638
free(buffer);
1014
1639
if(tcp_sd >= 0){
1015
ret = (int)TEMP_FAILURE_RETRY(close(tcp_sd));
1640
ret = close(tcp_sd);
1016
1641
}
1017
1642
if(ret == -1){
1018
1643
if(e == 0){
1043
1668
AVAHI_GCC_UNUSED AvahiStringList *txt,
1044
1669
AVAHI_GCC_UNUSED AvahiLookupResultFlags
1045
1670
flags,
1046
void* mc){
1671
void *mc){
1047
1672
if(r == NULL){
1048
1673
return;
1049
1674
}
1052
1677
timed out */
1053
1678
1054
1679
if(quit_now){
1680
avahi_s_service_resolver_free(r);
1055
1681
return;
1056
1682
}
1057
1683
1102
1728
const char *domain,
1103
1729
AVAHI_GCC_UNUSED AvahiLookupResultFlags
1104
1730
flags,
1105
void* mc){
1731
void *mc){
1106
1732
if(b == NULL){
1107
1733
return;
1108
1734
}
1168
1794
errno = old_errno;
1169
1795
}
1170
1796
1797
__attribute__((nonnull, warn_unused_result))
1171
1798
bool get_flags(const char *ifname, struct ifreq *ifr){
1172
1799
int ret;
1173
error_t ret_errno;
1800
int old_errno;
1174
1801
1175
1802
int s = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1176
1803
if(s < 0){
1177
ret_errno = errno;
1804
old_errno = errno;
1178
1805
perror_plus("socket");
1179
errno = ret_errno;
1806
errno = old_errno;
1180
1807
return false;
1181
1808
}
1182
strcpy(ifr->ifr_name, ifname);
1809
strncpy(ifr->ifr_name, ifname, IF_NAMESIZE);
1810
ifr->ifr_name[IF_NAMESIZE-1] = '\0'; /* NUL terminate */
1183
1811
ret = ioctl(s, SIOCGIFFLAGS, ifr);
1184
1812
if(ret == -1){
1185
1813
if(debug){
1186
ret_errno = errno;
1814
old_errno = errno;
1187
1815
perror_plus("ioctl SIOCGIFFLAGS");
1188
errno = ret_errno;
1816
errno = old_errno;
1817
}
1818
if((close(s) == -1) and debug){
1819
old_errno = errno;
1820
perror_plus("close");
1821
errno = old_errno;
1189
1822
}
1190
1823
return false;
1191
1824
}
1825
if((close(s) == -1) and debug){
1826
old_errno = errno;
1827
perror_plus("close");
1828
errno = old_errno;
1829
}
1192
1830
return true;
1193
1831
}
1194
1832
1833
__attribute__((nonnull, warn_unused_result))
1195
1834
bool good_flags(const char *ifname, const struct ifreq *ifr){
1196
1835
1197
1836
/* Reject the loopback device */
1239
1878
* corresponds to an acceptable network device.
1240
1879
* (This function is passed to scandir(3) as a filter function.)
1241
1880
*/
1881
__attribute__((nonnull, warn_unused_result))
1242
1882
int good_interface(const struct dirent *if_entry){
1243
1883
if(if_entry->d_name[0] == '.'){
1244
1884
return 0;
1262
1902
/*
1263
1903
* This function determines if a network interface is up.
1264
1904
*/
1905
__attribute__((nonnull, warn_unused_result))
1265
1906
bool interface_is_up(const char *interface){
1266
1907
struct ifreq ifr;
1267
1908
if(not get_flags(interface, &ifr)){
1278
1919
/*
1279
1920
* This function determines if a network interface is running
1280
1921
*/
1922
__attribute__((nonnull, warn_unused_result))
1281
1923
bool interface_is_running(const char *interface){
1282
1924
struct ifreq ifr;
1283
1925
if(not get_flags(interface, &ifr)){
1291
1933
return (bool)(ifr.ifr_flags & IFF_RUNNING);
1292
1934
}
1293
1935
1936
__attribute__((nonnull, pure, warn_unused_result))
1294
1937
int notdotentries(const struct dirent *direntry){
1295
1938
/* Skip "." and ".." */
1296
1939
if(direntry->d_name[0] == '.'
1303
1946
}
1304
1947
1305
1948
/* Is this directory entry a runnable program? */
1949
__attribute__((nonnull, warn_unused_result))
1306
1950
int runnable_hook(const struct dirent *direntry){
1307
1951
int ret;
1308
1952
size_t sret;
1316
1960
sret = strspn(direntry->d_name, "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
1317
1961
"abcdefghijklmnopqrstuvwxyz"
1318
1962
"0123456789"
1319
"_-");
1963
"_.-");
1320
1964
if((direntry->d_name)[sret] != '\0'){
1321
1965
/* Contains non-allowed characters */
1322
1966
if(debug){
1326
1970
return 0;
1327
1971
}
1328
1972
1329
char *fullname = NULL;
1330
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1331
if(ret < 0){
1332
perror_plus("asprintf");
1333
return 0;
1334
}
1335
1336
ret = stat(fullname, &st);
1973
ret = fstatat(hookdir_fd, direntry->d_name, &st, 0);
1337
1974
if(ret == -1){
1338
1975
if(debug){
1339
1976
perror_plus("Could not stat hook");
1363
2000
return 1;
1364
2001
}
1365
2002
2003
__attribute__((nonnull, warn_unused_result))
1366
2004
int avahi_loop_with_timeout(AvahiSimplePoll *s, int retry_interval,
1367
2005
mandos_context *mc){
1368
2006
int ret;
1372
2010
1373
2011
while(true){
1374
2012
if(mc->current_server == NULL){
1375
if (debug){
2013
if(debug){
1376
2014
fprintf_plus(stderr, "Wait until first server is found."
1377
2015
" No timeout!\n");
1378
2016
}
1379
2017
ret = avahi_simple_poll_iterate(s, -1);
1380
2018
} else {
1381
if (debug){
2019
if(debug){
1382
2020
fprintf_plus(stderr, "Check current_server if we should run"
1383
2021
" it, or wait\n");
1384
2022
}
1401
2039
- ((intmax_t)waited_time.tv_sec * 1000))
1402
2040
- ((intmax_t)waited_time.tv_nsec / 1000000));
1403
2041
1404
if (debug){
2042
if(debug){
1405
2043
fprintf_plus(stderr, "Blocking for %" PRIdMAX " ms\n",
1406
2044
block_time);
1407
2045
}
1429
2067
ret = avahi_simple_poll_iterate(s, (int)block_time);
1430
2068
}
1431
2069
if(ret != 0){
1432
if (ret > 0 or errno != EINTR){
2070
if(ret > 0 or errno != EINTR){
1433
2071
return (ret != 1) ? ret : 0;
1434
2072
}
1435
2073
}
1436
2074
}
1437
2075
}
1438
2076
1439
/* Set effective uid to 0, return errno */
1440
error_t raise_privileges(void){
1441
error_t old_errno = errno;
1442
error_t ret_errno = 0;
1443
if(seteuid(0) == -1){
1444
ret_errno = errno;
1445
perror_plus("seteuid");
1446
}
1447
errno = old_errno;
1448
return ret_errno;
1449
}
1450
1451
/* Set effective and real user ID to 0. Return errno. */
1452
error_t raise_privileges_permanently(void){
1453
error_t old_errno = errno;
1454
error_t ret_errno = raise_privileges();
1455
if(ret_errno != 0){
1456
errno = old_errno;
1457
return ret_errno;
1458
}
1459
if(setuid(0) == -1){
1460
ret_errno = errno;
1461
perror_plus("seteuid");
1462
}
1463
errno = old_errno;
1464
return ret_errno;
1465
}
1466
1467
/* Set effective user ID to unprivileged saved user ID */
1468
error_t lower_privileges(void){
1469
error_t old_errno = errno;
1470
error_t ret_errno = 0;
1471
if(seteuid(uid) == -1){
1472
ret_errno = errno;
1473
perror_plus("seteuid");
1474
}
1475
errno = old_errno;
1476
return ret_errno;
1477
}
1478
1479
/* Lower privileges permanently */
1480
error_t lower_privileges_permanently(void){
1481
error_t old_errno = errno;
1482
error_t ret_errno = 0;
1483
if(setuid(uid) == -1){
1484
ret_errno = errno;
1485
perror_plus("setuid");
1486
}
1487
errno = old_errno;
1488
return ret_errno;
1489
}
1490
1491
bool run_network_hooks(const char *mode, const char *interface,
2077
__attribute__((nonnull))
2078
void run_network_hooks(const char *mode, const char *interface,
1492
2079
const float delay){
1493
struct dirent **direntries;
1494
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1495
alphasort);
2080
struct dirent **direntries = NULL;
2081
if(hookdir_fd == -1){
2082
hookdir_fd = open(hookdir, O_RDONLY | O_DIRECTORY | O_PATH
2083
| O_CLOEXEC);
2084
if(hookdir_fd == -1){
2085
if(errno == ENOENT){
2086
if(debug){
2087
fprintf_plus(stderr, "Network hook directory \"%s\" not"
2088
" found\n", hookdir);
2089
}
2090
} else {
2091
perror_plus("open");
2092
}
2093
return;
2094
}
2095
}
2096
int devnull = (int)TEMP_FAILURE_RETRY(open("/dev/null", O_RDONLY));
2097
if(devnull == -1){
2098
perror_plus("open(\"/dev/null\", O_RDONLY)");
2099
return;
2100
}
2101
int numhooks = scandirat(hookdir_fd, ".", &direntries,
2102
runnable_hook, alphasort);
1496
2103
if(numhooks == -1){
1497
if(errno == ENOENT){
1498
if(debug){
1499
fprintf_plus(stderr, "Network hook directory \"%s\" not"
1500
" found\n", hookdir);
1501
}
1502
} else {
1503
perror_plus("scandir");
2104
perror_plus("scandir");
2105
close(devnull);
2106
return;
2107
}
2108
struct dirent *direntry;
2109
int ret;
2110
for(int i = 0; i < numhooks; i++){
2111
direntry = direntries[i];
2112
if(debug){
2113
fprintf_plus(stderr, "Running network hook \"%s\"\n",
2114
direntry->d_name);
1504
2115
}
1505
} else {
1506
struct dirent *direntry;
1507
int ret;
1508
int devnull = open("/dev/null", O_RDONLY);
1509
for(int i = 0; i < numhooks; i++){
1510
direntry = direntries[i];
1511
char *fullname = NULL;
1512
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1513
if(ret < 0){
2116
pid_t hook_pid = fork();
2117
if(hook_pid == 0){
2118
/* Child */
2119
/* Raise privileges */
2120
errno = raise_privileges_permanently();
2121
if(errno != 0){
2122
perror_plus("Failed to raise privileges");
2123
_exit(EX_NOPERM);
2124
}
2125
/* Set group */
2126
errno = 0;
2127
ret = setgid(0);
2128
if(ret == -1){
2129
perror_plus("setgid");
2130
_exit(EX_NOPERM);
2131
}
2132
/* Reset supplementary groups */
2133
errno = 0;
2134
ret = setgroups(0, NULL);
2135
if(ret == -1){
2136
perror_plus("setgroups");
2137
_exit(EX_NOPERM);
2138
}
2139
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
2140
if(ret == -1){
2141
perror_plus("setenv");
2142
_exit(EX_OSERR);
2143
}
2144
ret = setenv("DEVICE", interface, 1);
2145
if(ret == -1){
2146
perror_plus("setenv");
2147
_exit(EX_OSERR);
2148
}
2149
ret = setenv("VERBOSITY", debug ? "1" : "0", 1);
2150
if(ret == -1){
2151
perror_plus("setenv");
2152
_exit(EX_OSERR);
2153
}
2154
ret = setenv("MODE", mode, 1);
2155
if(ret == -1){
2156
perror_plus("setenv");
2157
_exit(EX_OSERR);
2158
}
2159
char *delaystring;
2160
ret = asprintf(&delaystring, "%f", (double)delay);
2161
if(ret == -1){
1514
2162
perror_plus("asprintf");
1515
continue;
1516
}
1517
if(debug){
1518
fprintf_plus(stderr, "Running network hook \"%s\"\n",
1519
direntry->d_name);
1520
}
1521
pid_t hook_pid = fork();
1522
if(hook_pid == 0){
1523
/* Child */
1524
/* Raise privileges */
1525
raise_privileges_permanently();
1526
/* Set group */
1527
errno = 0;
1528
ret = setgid(0);
1529
if(ret == -1){
1530
perror_plus("setgid");
1531
}
1532
/* Reset supplementary groups */
1533
errno = 0;
1534
ret = setgroups(0, NULL);
1535
if(ret == -1){
1536
perror_plus("setgroups");
1537
}
1538
dup2(devnull, STDIN_FILENO);
1539
close(devnull);
1540
dup2(STDERR_FILENO, STDOUT_FILENO);
1541
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1542
if(ret == -1){
1543
perror_plus("setenv");
1544
_exit(EX_OSERR);
1545
}
1546
ret = setenv("DEVICE", interface, 1);
1547
if(ret == -1){
1548
perror_plus("setenv");
1549
_exit(EX_OSERR);
1550
}
1551
ret = setenv("VERBOSITY", debug ? "1" : "0", 1);
1552
if(ret == -1){
1553
perror_plus("setenv");
1554
_exit(EX_OSERR);
1555
}
1556
ret = setenv("MODE", mode, 1);
1557
if(ret == -1){
1558
perror_plus("setenv");
1559
_exit(EX_OSERR);
1560
}
1561
char *delaystring;
1562
ret = asprintf(&delaystring, "%f", delay);
1563
if(ret == -1){
1564
perror_plus("asprintf");
1565
_exit(EX_OSERR);
1566
}
1567
ret = setenv("DELAY", delaystring, 1);
1568
if(ret == -1){
1569
free(delaystring);
1570
perror_plus("setenv");
1571
_exit(EX_OSERR);
1572
}
2163
_exit(EX_OSERR);
2164
}
2165
ret = setenv("DELAY", delaystring, 1);
2166
if(ret == -1){
1573
2167
free(delaystring);
1574
if(connect_to != NULL){
1575
ret = setenv("CONNECT", connect_to, 1);
1576
if(ret == -1){
1577
perror_plus("setenv");
1578
_exit(EX_OSERR);
1579
}
1580
}
1581
if(execl(fullname, direntry->d_name, mode, NULL) == -1){
1582
perror_plus("execl");
1583
_exit(EXIT_FAILURE);
1584
}
2168
perror_plus("setenv");
2169
_exit(EX_OSERR);
2170
}
2171
free(delaystring);
2172
if(connect_to != NULL){
2173
ret = setenv("CONNECT", connect_to, 1);
2174
if(ret == -1){
2175
perror_plus("setenv");
2176
_exit(EX_OSERR);
2177
}
2178
}
2179
int hook_fd = (int)TEMP_FAILURE_RETRY(openat(hookdir_fd,
2180
direntry->d_name,
2181
O_RDONLY));
2182
if(hook_fd == -1){
2183
perror_plus("openat");
2184
_exit(EXIT_FAILURE);
2185
}
2186
if(close(hookdir_fd) == -1){
2187
perror_plus("close");
2188
_exit(EXIT_FAILURE);
2189
}
2190
ret = dup2(devnull, STDIN_FILENO);
2191
if(ret == -1){
2192
perror_plus("dup2(devnull, STDIN_FILENO)");
2193
_exit(EX_OSERR);
2194
}
2195
ret = close(devnull);
2196
if(ret == -1){
2197
perror_plus("close");
2198
_exit(EX_OSERR);
2199
}
2200
ret = dup2(STDERR_FILENO, STDOUT_FILENO);
2201
if(ret == -1){
2202
perror_plus("dup2(STDERR_FILENO, STDOUT_FILENO)");
2203
_exit(EX_OSERR);
2204
}
2205
if(fexecve(hook_fd, (char *const []){ direntry->d_name, NULL },
2206
environ) == -1){
2207
perror_plus("fexecve");
2208
_exit(EXIT_FAILURE);
2209
}
2210
} else {
2211
if(hook_pid == -1){
2212
perror_plus("fork");
2213
free(direntry);
2214
continue;
2215
}
2216
int status;
2217
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
2218
perror_plus("waitpid");
2219
free(direntry);
2220
continue;
2221
}
2222
if(WIFEXITED(status)){
2223
if(WEXITSTATUS(status) != 0){
2224
fprintf_plus(stderr, "Warning: network hook \"%s\" exited"
2225
" with status %d\n", direntry->d_name,
2226
WEXITSTATUS(status));
2227
free(direntry);
2228
continue;
2229
}
2230
} else if(WIFSIGNALED(status)){
2231
fprintf_plus(stderr, "Warning: network hook \"%s\" died by"
2232
" signal %d\n", direntry->d_name,
2233
WTERMSIG(status));
2234
free(direntry);
2235
continue;
1585
2236
} else {
1586
int status;
1587
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
1588
perror_plus("waitpid");
1589
free(fullname);
1590
continue;
1591
}
1592
if(WIFEXITED(status)){
1593
if(WEXITSTATUS(status) != 0){
1594
fprintf_plus(stderr, "Warning: network hook \"%s\" exited"
1595
" with status %d\n", direntry->d_name,
1596
WEXITSTATUS(status));
1597
free(fullname);
1598
continue;
1599
}
1600
} else if(WIFSIGNALED(status)){
1601
fprintf_plus(stderr, "Warning: network hook \"%s\" died by"
1602
" signal %d\n", direntry->d_name,
1603
WTERMSIG(status));
1604
free(fullname);
1605
continue;
1606
} else {
1607
fprintf_plus(stderr, "Warning: network hook \"%s\""
1608
" crashed\n", direntry->d_name);
1609
free(fullname);
1610
continue;
1611
}
1612
}
1613
free(fullname);
1614
if(debug){
1615
fprintf_plus(stderr, "Network hook \"%s\" ran successfully\n",
1616
direntry->d_name);
1617
}
1618
}
1619
close(devnull);
1620
}
1621
return true;
2237
fprintf_plus(stderr, "Warning: network hook \"%s\""
2238
" crashed\n", direntry->d_name);
2239
free(direntry);
2240
continue;
2241
}
2242
}
2243
if(debug){
2244
fprintf_plus(stderr, "Network hook \"%s\" ran successfully\n",
2245
direntry->d_name);
2246
}
2247
free(direntry);
2248
}
2249
free(direntries);
2250
if(close(hookdir_fd) == -1){
2251
perror_plus("close");
2252
} else {
2253
hookdir_fd = -1;
2254
}
2255
close(devnull);
1622
2256
}
1623
2257
1624
error_t bring_up_interface(const char *const interface,
1625
const float delay){
1626
int sd = -1;
1627
error_t old_errno = errno;
1628
error_t ret_errno = 0;
1629
int ret, ret_setflags;
2258
__attribute__((nonnull, warn_unused_result))
2259
int bring_up_interface(const char *const interface,
2260
const float delay){
2261
int old_errno = errno;
2262
int ret;
1630
2263
struct ifreq network;
1631
2264
unsigned int if_index = if_nametoindex(interface);
1632
2265
if(if_index == 0){
1641
2274
}
1642
2275
1643
2276
if(not interface_is_up(interface)){
1644
if(not get_flags(interface, &network) and debug){
2277
int ret_errno = 0;
2278
int ioctl_errno = 0;
2279
if(not get_flags(interface, &network)){
1645
2280
ret_errno = errno;
1646
2281
fprintf_plus(stderr, "Failed to get flags for interface "
1647
2282
"\"%s\"\n", interface);
2283
errno = old_errno;
1648
2284
return ret_errno;
1649
2285
}
1650
network.ifr_flags |= IFF_UP;
2286
network.ifr_flags |= IFF_UP; /* set flag */
1651
2287
1652
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1653
if(sd < 0){
2288
int sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
2289
if(sd == -1){
1654
2290
ret_errno = errno;
1655
2291
perror_plus("socket");
1656
2292
errno = old_errno;
1657
2293
return ret_errno;
1658
2294
}
1659
2295
1660
2296
if(quit_now){
1661
close(sd);
2297
ret = close(sd);
2298
if(ret == -1){
2299
perror_plus("close");
2300
}
1662
2301
errno = old_errno;
1663
2302
return EINTR;
1664
2303
}
1668
2307
interface);
1669
2308
}
1670
2309
1671
/* Raise priviliges */
1672
raise_privileges();
2310
/* Raise privileges */
2311
ret_errno = raise_privileges();
2312
if(ret_errno != 0){
2313
errno = ret_errno;
2314
perror_plus("Failed to raise privileges");
2315
}
1673
2316
1674
2317
#ifdef __linux__
1675
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1676
messages about the network interface to mess up the prompt */
1677
int ret_linux = klogctl(8, NULL, 5);
1678
bool restore_loglevel = true;
1679
if(ret_linux == -1){
1680
restore_loglevel = false;
1681
perror_plus("klogctl");
2318
int ret_linux;
2319
bool restore_loglevel = false;
2320
if(ret_errno == 0){
2321
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
2322
messages about the network interface to mess up the prompt */
2323
ret_linux = klogctl(8, NULL, 5);
2324
if(ret_linux == -1){
2325
perror_plus("klogctl");
2326
} else {
2327
restore_loglevel = true;
2328
}
1682
2329
}
1683
2330
#endif /* __linux__ */
1684
ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1685
ret_errno = errno;
2331
int ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
2332
ioctl_errno = errno;
1686
2333
#ifdef __linux__
1687
2334
if(restore_loglevel){
1688
2335
ret_linux = klogctl(7, NULL, 0);
1692
2339
}
1693
2340
#endif /* __linux__ */
1694
2341
1695
/* Lower privileges */
1696
lower_privileges();
2342
/* If raise_privileges() succeeded above */
2343
if(ret_errno == 0){
2344
/* Lower privileges */
2345
ret_errno = lower_privileges();
2346
if(ret_errno != 0){
2347
errno = ret_errno;
2348
perror_plus("Failed to lower privileges");
2349
}
2350
}
1697
2351
1698
2352
/* Close the socket */
1699
ret = (int)TEMP_FAILURE_RETRY(close(sd));
2353
ret = close(sd);
1700
2354
if(ret == -1){
1701
2355
perror_plus("close");
1702
2356
}
1703
2357
1704
2358
if(ret_setflags == -1){
1705
errno = ret_errno;
2359
errno = ioctl_errno;
1706
2360
perror_plus("ioctl SIOCSIFFLAGS +IFF_UP");
1707
2361
errno = old_errno;
1708
return ret_errno;
2362
return ioctl_errno;
1709
2363
}
1710
2364
} else if(debug){
1711
2365
fprintf_plus(stderr, "Interface \"%s\" is already up; good\n",
1714
2368
1715
2369
/* Sleep checking until interface is running.
1716
2370
Check every 0.25s, up to total time of delay */
1717
for(int i=0; i < delay * 4; i++){
2371
for(int i = 0; i < delay * 4; i++){
1718
2372
if(interface_is_running(interface)){
1719
2373
break;
1720
2374
}
1729
2383
return 0;
1730
2384
}
1731
2385
1732
error_t take_down_interface(const char *const interface){
1733
error_t old_errno = errno;
2386
__attribute__((nonnull, warn_unused_result))
2387
int take_down_interface(const char *const interface){
2388
int old_errno = errno;
1734
2389
struct ifreq network;
1735
2390
unsigned int if_index = if_nametoindex(interface);
1736
2391
if(if_index == 0){
1739
2394
return ENXIO;
1740
2395
}
1741
2396
if(interface_is_up(interface)){
1742
error_t ret_errno = 0;
2397
int ret_errno = 0;
2398
int ioctl_errno = 0;
1743
2399
if(not get_flags(interface, &network) and debug){
1744
2400
ret_errno = errno;
1745
2401
fprintf_plus(stderr, "Failed to get flags for interface "
1746
2402
"\"%s\"\n", interface);
2403
errno = old_errno;
1747
2404
return ret_errno;
1748
2405
}
1749
2406
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
1750
2407
1751
2408
int sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1752
if(sd < 0){
2409
if(sd == -1){
1753
2410
ret_errno = errno;
1754
2411
perror_plus("socket");
1755
2412
errno = old_errno;
1761
2418
interface);
1762
2419
}
1763
2420
1764
/* Raise priviliges */
1765
raise_privileges();
2421
/* Raise privileges */
2422
ret_errno = raise_privileges();
2423
if(ret_errno != 0){
2424
errno = ret_errno;
2425
perror_plus("Failed to raise privileges");
2426
}
1766
2427
1767
2428
int ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1768
ret_errno = errno;
2429
ioctl_errno = errno;
1769
2430
1770
/* Lower privileges */
1771
lower_privileges();
2431
/* If raise_privileges() succeeded above */
2432
if(ret_errno == 0){
2433
/* Lower privileges */
2434
ret_errno = lower_privileges();
2435
if(ret_errno != 0){
2436
errno = ret_errno;
2437
perror_plus("Failed to lower privileges");
2438
}
2439
}
1772
2440
1773
2441
/* Close the socket */
1774
int ret = (int)TEMP_FAILURE_RETRY(close(sd));
2442
int ret = close(sd);
1775
2443
if(ret == -1){
1776
2444
perror_plus("close");
1777
2445
}
1778
2446
1779
2447
if(ret_setflags == -1){
1780
errno = ret_errno;
2448
errno = ioctl_errno;
1781
2449
perror_plus("ioctl SIOCSIFFLAGS -IFF_UP");
1782
2450
errno = old_errno;
1783
return ret_errno;
2451
return ioctl_errno;
1784
2452
}
1785
2453
} else if(debug){
1786
2454
fprintf_plus(stderr, "Interface \"%s\" is already down; odd\n",
1792
2460
}
1793
2461
1794
2462
int main(int argc, char *argv[]){
1795
mandos_context mc = { .server = NULL, .dh_bits = 1024,
1796
.priority = "SECURE256:!CTYPE-X.509:"
1797
"+CTYPE-OPENPGP", .current_server = NULL,
1798
.interfaces = NULL, .interfaces_size = 0 };
2463
mandos_context mc = { .server = NULL, .dh_bits = 0,
2464
#if GNUTLS_VERSION_NUMBER >= 0x030606
2465
.priority = "SECURE128:!CTYPE-X.509"
2466
":+CTYPE-RAWPK:!RSA:!VERS-ALL:+VERS-TLS1.3"
2467
":%PROFILE_ULTRA",
2468
#elif GNUTLS_VERSION_NUMBER < 0x030600
2469
.priority = "SECURE256:!CTYPE-X.509"
2470
":+CTYPE-OPENPGP:!RSA:+SIGN-DSA-SHA256",
2471
#else
2472
#error "Needs GnuTLS 3.6.6 or later, or before 3.6.0"
2473
#endif
2474
.current_server = NULL, .interfaces = NULL,
2475
.interfaces_size = 0 };
1799
2476
AvahiSServiceBrowser *sb = NULL;
1800
2477
error_t ret_errno;
1801
2478
int ret;
1804
2481
int exitcode = EXIT_SUCCESS;
1805
2482
char *interfaces_to_take_down = NULL;
1806
2483
size_t interfaces_to_take_down_size = 0;
1807
char tempdir[] = "/tmp/mandosXXXXXX";
1808
bool tempdir_created = false;
2484
char run_tempdir[] = "/run/tmp/mandosXXXXXX";
2485
char old_tempdir[] = "/tmp/mandosXXXXXX";
2486
char *tempdir = NULL;
1809
2487
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
1810
2488
const char *seckey = PATHDIR "/" SECKEY;
1811
2489
const char *pubkey = PATHDIR "/" PUBKEY;
2490
#if GNUTLS_VERSION_NUMBER >= 0x030606
2491
const char *tls_privkey = PATHDIR "/" TLS_PRIVKEY;
2492
const char *tls_pubkey = PATHDIR "/" TLS_PUBKEY;
2493
#endif
2494
const char *dh_params_file = NULL;
1812
2495
char *interfaces_hooks = NULL;
1813
2496
1814
2497
bool gnutls_initialized = false;
1861
2544
{ .name = "pubkey", .key = 'p',
1862
2545
.arg = "FILE",
1863
2546
.doc = "OpenPGP public key file base name",
1864
.group = 2 },
2547
.group = 1 },
2548
{ .name = "tls-privkey", .key = 't',
2549
.arg = "FILE",
2550
#if GNUTLS_VERSION_NUMBER >= 0x030606
2551
.doc = "TLS private key file base name",
2552
#else
2553
.doc = "Dummy; ignored (requires GnuTLS 3.6.6)",
2554
#endif
2555
.group = 1 },
2556
{ .name = "tls-pubkey", .key = 'T',
2557
.arg = "FILE",
2558
#if GNUTLS_VERSION_NUMBER >= 0x030606
2559
.doc = "TLS public key file base name",
2560
#else
2561
.doc = "Dummy; ignored (requires GnuTLS 3.6.6)",
2562
#endif
2563
.group = 1 },
1865
2564
{ .name = "dh-bits", .key = 129,
1866
2565
.arg = "BITS",
1867
2566
.doc = "Bit length of the prime number used in the"
1868
2567
" Diffie-Hellman key exchange",
1869
2568
.group = 2 },
2569
{ .name = "dh-params", .key = 134,
2570
.arg = "FILE",
2571
.doc = "PEM-encoded PKCS#3 file with pre-generated parameters"
2572
" for the Diffie-Hellman key exchange",
2573
.group = 2 },
1870
2574
{ .name = "priority", .key = 130,
1871
2575
.arg = "STRING",
1872
2576
.doc = "GnuTLS priority string for the TLS handshake",
1918
2622
case 'p': /* --pubkey */
1919
2623
pubkey = arg;
1920
2624
break;
2625
case 't': /* --tls-privkey */
2626
#if GNUTLS_VERSION_NUMBER >= 0x030606
2627
tls_privkey = arg;
2628
#endif
2629
break;
2630
case 'T': /* --tls-pubkey */
2631
#if GNUTLS_VERSION_NUMBER >= 0x030606
2632
tls_pubkey = arg;
2633
#endif
2634
break;
1921
2635
case 129: /* --dh-bits */
1922
2636
errno = 0;
1923
2637
tmpmax = strtoimax(arg, &tmp, 10);
1927
2641
}
1928
2642
mc.dh_bits = (typeof(mc.dh_bits))tmpmax;
1929
2643
break;
2644
case 134: /* --dh-params */
2645
dh_params_file = arg;
2646
break;
1930
2647
case 130: /* --priority */
1931
2648
mc.priority = arg;
1932
2649
break;
1972
2689
.args_doc = "",
1973
2690
.doc = "Mandos client -- Get and decrypt"
1974
2691
" passwords from a Mandos server" };
1975
ret = argp_parse(&argp, argc, argv,
1976
ARGP_IN_ORDER | ARGP_NO_HELP, 0, NULL);
1977
switch(ret){
2692
ret_errno = argp_parse(&argp, argc, argv,
2693
ARGP_IN_ORDER | ARGP_NO_HELP, 0, NULL);
2694
switch(ret_errno){
1978
2695
case 0:
1979
2696
break;
1980
2697
case ENOMEM:
1981
2698
default:
1982
errno = ret;
2699
errno = ret_errno;
1983
2700
perror_plus("argp_parse");
1984
2701
exitcode = EX_OSERR;
1985
2702
goto end;
1988
2705
goto end;
1989
2706
}
1990
2707
}
1991
2708
1992
2709
{
1993
2710
/* Work around Debian bug #633582:
1994
<http://bugs.debian.org/633582> */
2711
<https://bugs.debian.org/633582> */
1995
2712
1996
/* Re-raise priviliges */
1997
if(raise_privileges() == 0){
2713
/* Re-raise privileges */
2714
ret = raise_privileges();
2715
if(ret != 0){
2716
errno = ret;
2717
perror_plus("Failed to raise privileges");
2718
} else {
1998
2719
struct stat st;
1999
2720
2000
2721
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
2014
2735
}
2015
2736
}
2016
2737
}
2017
TEMP_FAILURE_RETRY(close(seckey_fd));
2738
close(seckey_fd);
2018
2739
}
2019
2740
}
2020
2741
2021
2742
if(strcmp(pubkey, PATHDIR "/" PUBKEY) == 0){
2022
2743
int pubkey_fd = open(pubkey, O_RDONLY);
2023
2744
if(pubkey_fd == -1){
2035
2756
}
2036
2757
}
2037
2758
}
2038
TEMP_FAILURE_RETRY(close(pubkey_fd));
2039
}
2040
}
2041
2759
close(pubkey_fd);
2760
}
2761
}
2762
2763
if(dh_params_file != NULL
2764
and strcmp(dh_params_file, PATHDIR "/dhparams.pem" ) == 0){
2765
int dhparams_fd = open(dh_params_file, O_RDONLY);
2766
if(dhparams_fd == -1){
2767
perror_plus("open");
2768
} else {
2769
ret = (int)TEMP_FAILURE_RETRY(fstat(dhparams_fd, &st));
2770
if(ret == -1){
2771
perror_plus("fstat");
2772
} else {
2773
if(S_ISREG(st.st_mode)
2774
and st.st_uid == 0 and st.st_gid == 0){
2775
ret = fchown(dhparams_fd, uid, gid);
2776
if(ret == -1){
2777
perror_plus("fchown");
2778
}
2779
}
2780
}
2781
close(dhparams_fd);
2782
}
2783
}
2784
2042
2785
/* Lower privileges */
2043
lower_privileges();
2786
ret = lower_privileges();
2787
if(ret != 0){
2788
errno = ret;
2789
perror_plus("Failed to lower privileges");
2790
}
2044
2791
}
2045
2792
}
2046
2793
2072
2819
memcpy(interfaces_hooks, mc.interfaces, mc.interfaces_size);
2073
2820
argz_stringify(interfaces_hooks, mc.interfaces_size, (int)',');
2074
2821
}
2075
if(not run_network_hooks("start", interfaces_hooks != NULL ?
2076
interfaces_hooks : "", delay)){
2077
goto end;
2078
}
2822
run_network_hooks("start", interfaces_hooks != NULL ?
2823
interfaces_hooks : "", delay);
2079
2824
}
2080
2825
2081
2826
if(not debug){
2159
2904
2160
2905
/* If no interfaces were specified, make a list */
2161
2906
if(mc.interfaces == NULL){
2162
struct dirent **direntries;
2907
struct dirent **direntries = NULL;
2163
2908
/* Look for any good interfaces */
2164
2909
ret = scandir(sys_class_net, &direntries, good_interface,
2165
2910
alphasort);
2171
2916
if(ret_errno != 0){
2172
2917
errno = ret_errno;
2173
2918
perror_plus("argz_add");
2919
free(direntries[i]);
2174
2920
continue;
2175
2921
}
2176
2922
if(debug){
2177
2923
fprintf_plus(stderr, "Will use interface \"%s\"\n",
2178
2924
direntries[i]->d_name);
2179
2925
}
2926
free(direntries[i]);
2180
2927
}
2181
2928
free(direntries);
2182
2929
} else {
2183
free(direntries);
2930
if(ret == 0){
2931
free(direntries);
2932
}
2184
2933
fprintf_plus(stderr, "Could not find a network interface\n");
2185
2934
exitcode = EXIT_FAILURE;
2186
2935
goto end;
2209
2958
break;
2210
2959
}
2211
2960
bool interface_was_up = interface_is_up(interface);
2212
ret = bring_up_interface(interface, delay);
2961
errno = bring_up_interface(interface, delay);
2213
2962
if(not interface_was_up){
2214
if(ret != 0){
2215
errno = ret;
2216
perror_plus("Failed to bring up interface");
2963
if(errno != 0){
2964
fprintf_plus(stderr, "Failed to bring up interface \"%s\":"
2965
" %s\n", interface, strerror(errno));
2217
2966
} else {
2218
ret_errno = argz_add(&interfaces_to_take_down,
2219
&interfaces_to_take_down_size,
2220
interface);
2221
if(ret_errno != 0){
2222
errno = ret_errno;
2967
errno = argz_add(&interfaces_to_take_down,
2968
&interfaces_to_take_down_size,
2969
interface);
2970
if(errno != 0){
2223
2971
perror_plus("argz_add");
2224
2972
}
2225
2973
}
2243
2991
goto end;
2244
2992
}
2245
2993
2246
ret = init_gnutls_global(pubkey, seckey, &mc);
2994
#if GNUTLS_VERSION_NUMBER >= 0x030606
2995
ret = init_gnutls_global(tls_pubkey, tls_privkey, dh_params_file, &mc);
2996
#elif GNUTLS_VERSION_NUMBER < 0x030600
2997
ret = init_gnutls_global(pubkey, seckey, dh_params_file, &mc);
2998
#else
2999
#error "Needs GnuTLS 3.6.6 or later, or before 3.6.0"
3000
#endif
2247
3001
if(ret == -1){
2248
3002
fprintf_plus(stderr, "init_gnutls_global failed\n");
2249
3003
exitcode = EX_UNAVAILABLE;
2256
3010
goto end;
2257
3011
}
2258
3012
2259
if(mkdtemp(tempdir) == NULL){
3013
/* Try /run/tmp before /tmp */
3014
tempdir = mkdtemp(run_tempdir);
3015
if(tempdir == NULL and errno == ENOENT){
3016
if(debug){
3017
fprintf_plus(stderr, "Tempdir %s did not work, trying %s\n",
3018
run_tempdir, old_tempdir);
3019
}
3020
tempdir = mkdtemp(old_tempdir);
3021
}
3022
if(tempdir == NULL){
2260
3023
perror_plus("mkdtemp");
2261
3024
goto end;
2262
3025
}
2263
tempdir_created = true;
2264
3026
2265
3027
if(quit_now){
2266
3028
goto end;
2341
3103
sleep((unsigned int)retry_interval);
2342
3104
}
2343
3105
2344
if (not quit_now){
3106
if(not quit_now){
2345
3107
exitcode = EXIT_SUCCESS;
2346
3108
}
2347
3109
2363
3125
2364
3126
/* Allocate a new server */
2365
3127
mc.server = avahi_server_new(avahi_simple_poll_get(simple_poll),
2366
&config, NULL, NULL, &ret_errno);
3128
&config, NULL, NULL, &ret);
2367
3129
2368
3130
/* Free the Avahi configuration data */
2369
3131
avahi_server_config_free(&config);
2372
3134
/* Check if creating the Avahi server object succeeded */
2373
3135
if(mc.server == NULL){
2374
3136
fprintf_plus(stderr, "Failed to create Avahi server: %s\n",
2375
avahi_strerror(ret_errno));
3137
avahi_strerror(ret));
2376
3138
exitcode = EX_UNAVAILABLE;
2377
3139
goto end;
2378
3140
}
2402
3164
if(debug){
2403
3165
fprintf_plus(stderr, "Starting Avahi loop search\n");
2404
3166
}
2405
3167
2406
3168
ret = avahi_loop_with_timeout(simple_poll,
2407
3169
(int)(retry_interval * 1000), &mc);
2408
3170
if(debug){
2413
3175
end:
2414
3176
2415
3177
if(debug){
2416
fprintf_plus(stderr, "%s exiting\n", argv[0]);
3178
if(signal_received){
3179
fprintf_plus(stderr, "%s exiting due to signal %d: %s\n",
3180
argv[0], signal_received,
3181
strsignal(signal_received));
3182
} else {
3183
fprintf_plus(stderr, "%s exiting\n", argv[0]);
3184
}
2417
3185
}
2418
3186
2419
3187
/* Cleanup things */
2430
3198
2431
3199
if(gnutls_initialized){
2432
3200
gnutls_certificate_free_credentials(mc.cred);
2433
gnutls_global_deinit();
2434
3201
gnutls_dh_params_deinit(mc.dh_params);
2435
3202
}
2436
3203
2444
3211
mc.current_server->prev->next = NULL;
2445
3212
while(mc.current_server != NULL){
2446
3213
server *next = mc.current_server->next;
3214
#ifdef __GNUC__
3215
#pragma GCC diagnostic push
3216
#pragma GCC diagnostic ignored "-Wcast-qual"
3217
#endif
3218
free((char *)(mc.current_server->ip));
3219
#ifdef __GNUC__
3220
#pragma GCC diagnostic pop
3221
#endif
2447
3222
free(mc.current_server);
2448
3223
mc.current_server = next;
2449
3224
}
2450
3225
}
2451
3226
2452
/* Re-raise priviliges */
3227
/* Re-raise privileges */
2453
3228
{
2454
raise_privileges();
2455
2456
/* Run network hooks */
2457
run_network_hooks("stop", interfaces_hooks != NULL ?
2458
interfaces_hooks : "", delay);
2459
2460
/* Take down the network interfaces which were brought up */
2461
{
2462
char *interface = NULL;
2463
while((interface=argz_next(interfaces_to_take_down,
2464
interfaces_to_take_down_size,
2465
interface))){
2466
ret_errno = take_down_interface(interface);
2467
if(ret_errno != 0){
2468
errno = ret_errno;
2469
perror_plus("Failed to take down interface");
2470
}
2471
}
2472
if(debug and (interfaces_to_take_down == NULL)){
2473
fprintf_plus(stderr, "No interfaces needed to be taken"
2474
" down\n");
2475
}
2476
}
2477
2478
lower_privileges_permanently();
3229
ret = raise_privileges();
3230
if(ret != 0){
3231
errno = ret;
3232
perror_plus("Failed to raise privileges");
3233
} else {
3234
3235
/* Run network hooks */
3236
run_network_hooks("stop", interfaces_hooks != NULL ?
3237
interfaces_hooks : "", delay);
3238
3239
/* Take down the network interfaces which were brought up */
3240
{
3241
char *interface = NULL;
3242
while((interface = argz_next(interfaces_to_take_down,
3243
interfaces_to_take_down_size,
3244
interface))){
3245
ret = take_down_interface(interface);
3246
if(ret != 0){
3247
errno = ret;
3248
perror_plus("Failed to take down interface");
3249
}
3250
}
3251
if(debug and (interfaces_to_take_down == NULL)){
3252
fprintf_plus(stderr, "No interfaces needed to be taken"
3253
" down\n");
3254
}
3255
}
3256
}
3257
3258
ret = lower_privileges_permanently();
3259
if(ret != 0){
3260
errno = ret;
3261
perror_plus("Failed to lower privileges permanently");
3262
}
2479
3263
}
2480
3264
2481
3265
free(interfaces_to_take_down);
2482
3266
free(interfaces_hooks);
2483
3267
3268
void clean_dir_at(int base, const char * const dirname,
3269
uintmax_t level){
3270
struct dirent **direntries = NULL;
3271
int dret;
3272
int dir_fd = (int)TEMP_FAILURE_RETRY(openat(base, dirname,
3273
O_RDONLY
3274
| O_NOFOLLOW
3275
| O_DIRECTORY
3276
| O_PATH));
3277
if(dir_fd == -1){
3278
perror_plus("open");
3279
return;
3280
}
3281
int numentries = scandirat(dir_fd, ".", &direntries,
3282
notdotentries, alphasort);
3283
if(numentries >= 0){
3284
for(int i = 0; i < numentries; i++){
3285
if(debug){
3286
fprintf_plus(stderr, "Unlinking \"%s/%s\"\n",
3287
dirname, direntries[i]->d_name);
3288
}
3289
dret = unlinkat(dir_fd, direntries[i]->d_name, 0);
3290
if(dret == -1){
3291
if(errno == EISDIR){
3292
dret = unlinkat(dir_fd, direntries[i]->d_name,
3293
AT_REMOVEDIR);
3294
}
3295
if((dret == -1) and (errno == ENOTEMPTY)
3296
and (strcmp(direntries[i]->d_name, "private-keys-v1.d")
3297
== 0) and (level == 0)){
3298
/* Recurse only in this special case */
3299
clean_dir_at(dir_fd, direntries[i]->d_name, level+1);
3300
dret = 0;
3301
}
3302
if((dret == -1) and (errno != ENOENT)){
3303
fprintf_plus(stderr, "unlink(\"%s/%s\"): %s\n", dirname,
3304
direntries[i]->d_name, strerror(errno));
3305
}
3306
}
3307
free(direntries[i]);
3308
}
3309
3310
/* need to clean even if 0 because man page doesn't specify */
3311
free(direntries);
3312
dret = unlinkat(base, dirname, AT_REMOVEDIR);
3313
if(dret == -1 and errno != ENOENT){
3314
perror_plus("rmdir");
3315
}
3316
} else {
3317
perror_plus("scandirat");
3318
}
3319
close(dir_fd);
3320
}
3321
2484
3322
/* Removes the GPGME temp directory and all files inside */
2485
if(tempdir_created){
2486
struct dirent **direntries = NULL;
2487
struct dirent *direntry = NULL;
2488
int numentries = scandir(tempdir, &direntries, notdotentries,
2489
alphasort);
2490
if (numentries > 0){
2491
for(int i = 0; i < numentries; i++){
2492
direntry = direntries[i];
2493
char *fullname = NULL;
2494
ret = asprintf(&fullname, "%s/%s", tempdir,
2495
direntry->d_name);
2496
if(ret < 0){
2497
perror_plus("asprintf");
2498
continue;
2499
}
2500
ret = remove(fullname);
2501
if(ret == -1){
2502
fprintf_plus(stderr, "remove(\"%s\"): %s\n", fullname,
2503
strerror(errno));
2504
}
2505
free(fullname);
2506
}
2507
}
2508
2509
/* need to clean even if 0 because man page doesn't specify */
2510
free(direntries);
2511
if (numentries == -1){
2512
perror_plus("scandir");
2513
}
2514
ret = rmdir(tempdir);
2515
if(ret == -1 and errno != ENOENT){
2516
perror_plus("rmdir");
2517
}
3323
if(tempdir != NULL){
3324
clean_dir_at(-1, tempdir, 0);
2518
3325
}
2519
3326
2520
3327
if(quit_now){
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0