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- Committer: Teddy Hogeborn
- Date: 2021-02-03 23:10:42 UTC
- Revision ID: teddy@recompile.se-20210203231042-2z3egrvpo1zt7nej
mandos-ctl: Fix bad test for command.Remove and related minor issues
The test for command.Remove removes all clients from the spy server,
and then loops over all clients, looking for the corresponding Remove
command as recorded by the spy server. But since since there aren't
any clients left after they were removed, no assertions are made, and
the test therefore does nothing. Fix this.
In tests for command.Approve and command.Deny, add checks that clients
were not somehow removed by the command (in which case, likewise, no
assertions are made).
Add related checks to TestPropertySetterCmd.runTest; i.e. test that a
sequence is not empty before looping over it and making assertions.
* mandos-ctl (TestBaseCommands.test_Remove): Save a copy of the
original "clients" dict, and loop over those instead. Add assertion
that all clients were indeed removed. Also fix the code which looks
for the Remove command, which now needs to actually work.
(TestBaseCommands.test_Approve, TestBaseCommands.test_Deny): Add
assertion that there are still clients before looping over them.
(TestPropertySetterCmd.runTest): Add assertion that the list of
values to get is not empty before looping over them. Also add check
that there are still clients before looping over clients.
The test for command.Remove removes all clients from the spy server,
and then loops over all clients, looking for the corresponding Remove
command as recorded by the spy server. But since since there aren't
any clients left after they were removed, no assertions are made, and
the test therefore does nothing. Fix this.
In tests for command.Approve and command.Deny, add checks that clients
were not somehow removed by the command (in which case, likewise, no
assertions are made).
Add related checks to TestPropertySetterCmd.runTest; i.e. test that a
sequence is not empty before looping over it and making assertions.
* mandos-ctl (TestBaseCommands.test_Remove): Save a copy of the
original "clients" dict, and loop over those instead. Add assertion
that all clients were indeed removed. Also fix the code which looks
for the Remove command, which now needs to actually work.
(TestBaseCommands.test_Approve, TestBaseCommands.test_Deny): Add
assertion that there are still clients before looping over them.
(TestPropertySetterCmd.runTest): Add assertion that the list of
values to get is not empty before looping over them. Also add check
that there are still clients before looping over clients.
- files added:
- bugs.xml
- debian/tests
- debian/upstream
- dracut-module
- plugin-helpers
- files removed:
- initramfs-tools-hook-conf
- files modified:
- .bzrignore
added
removed
plugins.d/mandos-client.c
9
9
* "browse_callback", and parts of "main".
10
10
*
11
11
* Everything else is
12
* Copyright © 2008-2012 Teddy Hogeborn
13
* Copyright © 2008-2012 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 © 2008-2021 Teddy Hogeborn
13
* Copyright © 2008-2021 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
40
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), asprintf() */
41
42
#include <stdio.h> /* fprintf(), stderr, fwrite(),
43
stdout, ferror(), remove() */
44
#include <stdint.h> /* uint16_t, uint32_t, intptr_t */
45
#include <stddef.h> /* NULL, size_t, ssize_t */
46
#include <stdlib.h> /* free(), EXIT_SUCCESS, srand(),
47
strtof(), abort() */
39
#endif /* not _FILE_OFFSET_BITS */
40
41
#define _GNU_SOURCE /* program_invocation_short_name,
42
TEMP_FAILURE_RETRY(), O_CLOEXEC,
43
scandirat(), asprintf() */
48
44
#include <stdbool.h> /* bool, false, true */
49
#include <string.h> /* memset(), strcmp(), strlen(),
50
strerror(), asprintf(), strcpy() */
51
#include <sys/ioctl.h> /* ioctl */
52
#include <sys/types.h> /* socket(), inet_pton(), sockaddr,
53
sockaddr_in6, PF_INET6,
54
SOCK_STREAM, uid_t, gid_t, open(),
55
opendir(), DIR */
56
#include <sys/stat.h> /* open(), S_ISREG */
57
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
58
inet_pton(), connect() */
59
#include <fcntl.h> /* open() */
60
#include <dirent.h> /* opendir(), struct dirent, readdir()
61
*/
62
#include <inttypes.h> /* PRIu16, PRIdMAX, intmax_t,
45
#include <argp.h> /* argp_program_version,
46
argp_program_bug_address,
47
struct argp_option,
48
struct argp_state, argp_error(),
49
argp_state_help,
50
ARGP_HELP_STD_HELP,
51
ARGP_HELP_EXIT_ERR,
52
ARGP_HELP_EXIT_OK, ARGP_HELP_USAGE,
53
argp_err_exit_status,
54
ARGP_ERR_UNKNOWN, struct argp,
55
argp_parse(), ARGP_IN_ORDER,
56
ARGP_NO_HELP */
57
#include <stddef.h> /* NULL, size_t */
58
#include <sys/types.h> /* uid_t, gid_t, sig_atomic_t,
59
seteuid(), setuid(), pid_t,
60
setgid(), getuid(), getgid() */
61
#include <unistd.h> /* uid_t, gid_t, TEMP_FAILURE_RETRY(),
62
seteuid(), setuid(), close(),
63
ssize_t, read(), fork(), setgid(),
64
_exit(), dup2(), STDIN_FILENO,
65
STDERR_FILENO, STDOUT_FILENO,
66
fexecve(), write(), getuid(),
67
getgid(), fchown(), symlink(),
68
sleep(), unlinkat(), pause() */
69
#include <netinet/in.h> /* in_port_t, struct sockaddr_in6,
70
sa_family_t, struct sockaddr_in,
71
htons(), IN6_IS_ADDR_LINKLOCAL,
72
INET_ADDRSTRLEN, INET6_ADDRSTRLEN,
73
ntohl(), IPPROTO_IP */
74
#include <time.h> /* struct timespec, clock_gettime(),
75
CLOCK_MONOTONIC, time_t, struct tm,
76
gmtime_r(), clock_settime(),
77
CLOCK_REALTIME, nanosleep() */
78
#include <errno.h> /* errno,
79
program_invocation_short_name,
80
EINTR, EINVAL, ENETUNREACH,
81
EHOSTUNREACH, ECONNREFUSED, EPROTO,
82
EIO, ENOENT, ENXIO, error_t,
83
ENOMEM, EISDIR, ENOTEMPTY */
84
#include <stdio.h> /* fprintf(), stderr, perror(), FILE,
85
vfprintf(), off_t, SEEK_SET,
86
stdout, fwrite(), ferror(),
87
fflush(), asprintf() */
88
#include <stdarg.h> /* va_list, va_start(), vfprintf() */
89
#include <stdlib.h> /* realloc(), free(), malloc(),
90
getenv(), EXIT_FAILURE, setenv(),
91
EXIT_SUCCESS, strtof(), strtod(),
92
srand(), mkdtemp(), abort() */
93
#include <string.h> /* strdup(), strcmp(), strlen(),
94
strerror(), strncpy(), strspn(),
95
memcpy(), strrchr(), strchr(),
96
strsignal() */
97
#include <fcntl.h> /* open(), O_RDONLY, O_DIRECTORY,
98
O_PATH, O_CLOEXEC, openat(),
99
O_NOFOLLOW, AT_REMOVEDIR */
100
#include <iso646.h> /* or, and, not */
101
#include <sys/stat.h> /* struct stat, fstat(), fstatat(),
102
S_ISREG(), S_IXUSR, S_IXGRP,
103
S_IXOTH, lstat() */
104
#include <net/if.h> /* IF_NAMESIZE, if_indextoname(),
105
if_nametoindex(), SIOCGIFFLAGS,
106
IFF_LOOPBACK, IFF_POINTOPOINT,
107
IFF_BROADCAST, IFF_NOARP, IFF_UP,
108
IFF_RUNNING, SIOCSIFFLAGS */
109
#include <sysexits.h> /* EX_NOPERM, EX_OSERR,
110
EX_UNAVAILABLE, EX_USAGE */
111
#include <grp.h> /* setgroups() */
112
#include <sys/wait.h> /* waitpid(), WIFEXITED(),
113
WEXITSTATUS(), WIFSIGNALED(),
114
WTERMSIG() */
115
#include <signal.h> /* kill(), SIGTERM, struct sigaction,
116
SIG_DFL, sigemptyset(),
117
sigaddset(), SIGINT, SIGHUP,
118
SIG_IGN, raise() */
119
#include <sys/socket.h> /* struct sockaddr_storage, AF_INET6,
120
PF_INET6, AF_INET, PF_INET,
121
socket(), SOCK_STREAM,
122
SOCK_CLOEXEC, struct sockaddr,
123
connect(), SOCK_DGRAM */
124
#include <argz.h> /* argz_next(), argz_add_sep(),
125
argz_delete(), argz_stringify(),
126
argz_add(), argz_count() */
127
#include <inttypes.h> /* PRIuMAX, uintmax_t, uint32_t,
128
PRIdMAX, PRIu16, intmax_t,
63
129
strtoimax() */
64
#include <errno.h> /* perror(), errno,
65
program_invocation_short_name */
66
#include <time.h> /* nanosleep(), time(), sleep() */
67
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
68
SIOCSIFFLAGS, if_indextoname(),
69
if_nametoindex(), IF_NAMESIZE */
70
#include <netinet/in.h> /* IN6_IS_ADDR_LINKLOCAL,
71
INET_ADDRSTRLEN, INET6_ADDRSTRLEN
72
*/
73
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
74
getuid(), getgid(), seteuid(),
75
setgid(), pause(), _exit() */
76
#include <arpa/inet.h> /* inet_pton(), htons, inet_ntop() */
77
#include <iso646.h> /* not, or, and */
78
#include <argp.h> /* struct argp_option, error_t, struct
79
argp_state, struct argp,
80
argp_parse(), ARGP_KEY_ARG,
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, EX_UNAVAILABLE,
86
EX_NOHOST, EX_IOERR, EX_PROTOCOL */
87
#include <sys/wait.h> /* waitpid(), WIFEXITED(),
88
WEXITSTATUS(), WTERMSIG() */
89
#include <grp.h> /* setgroups() */
90
#include <argz.h> /* argz_add_sep(), argz_next(),
91
argz_delete(), argz_append(),
92
argz_stringify(), argz_add(),
93
argz_count() */
130
#include <arpa/inet.h> /* inet_pton() */
131
#include <stdint.h> /* uint32_t, intptr_t, uint16_t */
132
#include <netdb.h> /* getnameinfo(), NI_NUMERICHOST,
133
EAI_SYSTEM, gai_strerror() */
134
#include <sys/ioctl.h> /* ioctl() */
135
#include <dirent.h> /* struct dirent, scandirat(),
136
alphasort(), scandir() */
137
#include <limits.h> /* INT_MAX */
94
138
95
139
#ifdef __linux__
96
140
#include <sys/klog.h> /* klogctl() */
109
153
110
154
/* GnuTLS */
111
155
#include <gnutls/gnutls.h> /* All GnuTLS types, constants and
112
functions:
113
gnutls_*
114
init_gnutls_session(),
115
GNUTLS_* */
156
functions: gnutls_*, GNUTLS_* */
157
#if GNUTLS_VERSION_NUMBER < 0x030600
116
158
#include <gnutls/openpgp.h>
117
159
/* gnutls_certificate_set_openpgp_key_file(),
118
160
GNUTLS_OPENPGP_FMT_BASE64 */
161
#elif GNUTLS_VERSION_NUMBER >= 0x030606
162
#include <gnutls/x509.h> /* GNUTLS_PKCS_PLAIN,
163
GNUTLS_PKCS_NULL_PASSWORD */
164
#endif
119
165
120
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/* GPGME */
121
167
#include <gpgme.h> /* All GPGME types, constants and
122
168
functions:
123
gpgme_*
124
GPGME_PROTOCOL_OpenPGP,
125
GPG_ERR_NO_* */
169
gpgme_*, GPG_ERR_NO_*,
170
GPGME_IMPORT_*
171
GPGME_PROTOCOL_OpenPGP */
126
172
127
173
#define BUFFER_SIZE 256
128
174
129
175
#define PATHDIR "/conf/conf.d/mandos"
130
176
#define SECKEY "seckey.txt"
131
177
#define PUBKEY "pubkey.txt"
178
#define TLS_PRIVKEY "tls-privkey.pem"
179
#define TLS_PUBKEY "tls-pubkey.pem"
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#define HOOKDIR "/lib/mandos/network-hooks.d"
133
181
134
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bool debug = false;
138
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static const char sys_class_net[] = "/sys/class/net";
139
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char *connect_to = NULL;
140
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const char *hookdir = HOOKDIR;
189
int hookdir_fd = -1;
141
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uid_t uid = 65534;
142
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gid_t gid = 65534;
143
192
180
229
perror(print_text);
181
230
}
182
231
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__attribute__((format (gnu_printf, 2, 3)))
232
__attribute__((format (gnu_printf, 2, 3), nonnull))
184
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int fprintf_plus(FILE *stream, const char *format, ...){
185
234
va_list ap;
186
235
va_start (ap, format);
187
236
188
237
TEMP_FAILURE_RETRY(fprintf(stream, "Mandos plugin %s: ",
189
238
program_invocation_short_name));
190
return TEMP_FAILURE_RETRY(vfprintf(stream, format, ap));
239
return (int)TEMP_FAILURE_RETRY(vfprintf(stream, format, ap));
191
240
}
192
241
193
242
/*
195
244
* bytes. "buffer_capacity" is how much is currently allocated,
196
245
* "buffer_length" is how much is already used.
197
246
*/
247
__attribute__((nonnull, warn_unused_result))
198
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size_t incbuffer(char **buffer, size_t buffer_length,
199
249
size_t buffer_capacity){
200
250
if(buffer_length + BUFFER_SIZE > buffer_capacity){
201
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
202
if(buffer == NULL){
251
char *new_buf = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
252
if(new_buf == NULL){
253
int old_errno = errno;
254
free(*buffer);
255
errno = old_errno;
256
*buffer = NULL;
203
257
return 0;
204
258
}
259
*buffer = new_buf;
205
260
buffer_capacity += BUFFER_SIZE;
206
261
}
207
262
return buffer_capacity;
208
263
}
209
264
210
265
/* Add server to set of servers to retry periodically */
266
__attribute__((nonnull, warn_unused_result))
211
267
bool add_server(const char *ip, in_port_t port, AvahiIfIndex if_index,
212
268
int af, server **current_server){
213
269
int ret;
222
278
.af = af };
223
279
if(new_server->ip == NULL){
224
280
perror_plus("strdup");
281
free(new_server);
282
return false;
283
}
284
ret = clock_gettime(CLOCK_MONOTONIC, &(new_server->last_seen));
285
if(ret == -1){
286
perror_plus("clock_gettime");
287
#ifdef __GNUC__
288
#pragma GCC diagnostic push
289
#pragma GCC diagnostic ignored "-Wcast-qual"
290
#endif
291
free((char *)(new_server->ip));
292
#ifdef __GNUC__
293
#pragma GCC diagnostic pop
294
#endif
295
free(new_server);
225
296
return false;
226
297
}
227
298
/* Special case of first server */
229
300
new_server->next = new_server;
230
301
new_server->prev = new_server;
231
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*current_server = new_server;
232
/* Place the new server last in the list */
233
303
} else {
304
/* Place the new server last in the list */
234
305
new_server->next = *current_server;
235
306
new_server->prev = (*current_server)->prev;
236
307
new_server->prev->next = new_server;
237
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(*current_server)->prev = new_server;
238
309
}
239
ret = clock_gettime(CLOCK_MONOTONIC, &(*current_server)->last_seen);
240
if(ret == -1){
241
perror_plus("clock_gettime");
242
return false;
243
}
244
310
return true;
245
311
}
246
312
313
/* Set effective uid to 0, return errno */
314
__attribute__((warn_unused_result))
315
int raise_privileges(void){
316
int old_errno = errno;
317
int ret = 0;
318
if(seteuid(0) == -1){
319
ret = errno;
320
}
321
errno = old_errno;
322
return ret;
323
}
324
325
/* Set effective and real user ID to 0. Return errno. */
326
__attribute__((warn_unused_result))
327
int raise_privileges_permanently(void){
328
int old_errno = errno;
329
int ret = raise_privileges();
330
if(ret != 0){
331
errno = old_errno;
332
return ret;
333
}
334
if(setuid(0) == -1){
335
ret = errno;
336
}
337
errno = old_errno;
338
return ret;
339
}
340
341
/* Set effective user ID to unprivileged saved user ID */
342
__attribute__((warn_unused_result))
343
int lower_privileges(void){
344
int old_errno = errno;
345
int ret = 0;
346
if(seteuid(uid) == -1){
347
ret = errno;
348
}
349
errno = old_errno;
350
return ret;
351
}
352
353
/* Lower privileges permanently */
354
__attribute__((warn_unused_result))
355
int lower_privileges_permanently(void){
356
int old_errno = errno;
357
int ret = 0;
358
if(setuid(uid) == -1){
359
ret = errno;
360
}
361
errno = old_errno;
362
return ret;
363
}
364
247
365
/*
248
366
* Initialize GPGME.
249
367
*/
250
static bool init_gpgme(const char *seckey, const char *pubkey,
251
const char *tempdir, mandos_context *mc){
368
__attribute__((nonnull, warn_unused_result))
369
static bool init_gpgme(const char * const seckey,
370
const char * const pubkey,
371
const char * const tempdir,
372
mandos_context *mc){
252
373
gpgme_error_t rc;
253
374
gpgme_engine_info_t engine_info;
254
375
255
376
/*
256
377
* Helper function to insert pub and seckey to the engine keyring.
257
378
*/
258
bool import_key(const char *filename){
379
bool import_key(const char * const filename){
259
380
int ret;
260
381
int fd;
261
382
gpgme_data_t pgp_data;
266
387
return false;
267
388
}
268
389
390
/* Workaround for systems without a real-time clock; see also
391
Debian bug #894495: <https://bugs.debian.org/894495> */
392
do {
393
{
394
time_t currtime = time(NULL);
395
if(currtime != (time_t)-1){
396
struct tm tm;
397
if(gmtime_r(&currtime, &tm) == NULL) {
398
perror_plus("gmtime_r");
399
break;
400
}
401
if(tm.tm_year != 70 or tm.tm_mon != 0){
402
break;
403
}
404
if(debug){
405
fprintf_plus(stderr, "System clock is January 1970");
406
}
407
} else {
408
if(debug){
409
fprintf_plus(stderr, "System clock is invalid");
410
}
411
}
412
}
413
struct stat keystat;
414
ret = fstat(fd, &keystat);
415
if(ret != 0){
416
perror_plus("fstat");
417
break;
418
}
419
ret = raise_privileges();
420
if(ret != 0){
421
errno = ret;
422
perror_plus("Failed to raise privileges");
423
break;
424
}
425
if(debug){
426
fprintf_plus(stderr,
427
"Setting system clock to key file mtime");
428
}
429
if(clock_settime(CLOCK_REALTIME, &keystat.st_mtim) != 0){
430
perror_plus("clock_settime");
431
}
432
ret = lower_privileges();
433
if(ret != 0){
434
errno = ret;
435
perror_plus("Failed to lower privileges");
436
}
437
} while(false);
438
269
439
rc = gpgme_data_new_from_fd(&pgp_data, fd);
270
440
if(rc != GPG_ERR_NO_ERROR){
271
441
fprintf_plus(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
279
449
gpgme_strsource(rc), gpgme_strerror(rc));
280
450
return false;
281
451
}
452
{
453
gpgme_import_result_t import_result
454
= gpgme_op_import_result(mc->ctx);
455
if((import_result->imported < 1
456
or import_result->not_imported > 0)
457
and import_result->unchanged == 0){
458
fprintf_plus(stderr, "bad gpgme_op_import_results:\n");
459
fprintf_plus(stderr,
460
"The total number of considered keys: %d\n",
461
import_result->considered);
462
fprintf_plus(stderr,
463
"The number of keys without user ID: %d\n",
464
import_result->no_user_id);
465
fprintf_plus(stderr,
466
"The total number of imported keys: %d\n",
467
import_result->imported);
468
fprintf_plus(stderr, "The number of imported RSA keys: %d\n",
469
import_result->imported_rsa);
470
fprintf_plus(stderr, "The number of unchanged keys: %d\n",
471
import_result->unchanged);
472
fprintf_plus(stderr, "The number of new user IDs: %d\n",
473
import_result->new_user_ids);
474
fprintf_plus(stderr, "The number of new sub keys: %d\n",
475
import_result->new_sub_keys);
476
fprintf_plus(stderr, "The number of new signatures: %d\n",
477
import_result->new_signatures);
478
fprintf_plus(stderr, "The number of new revocations: %d\n",
479
import_result->new_revocations);
480
fprintf_plus(stderr,
481
"The total number of secret keys read: %d\n",
482
import_result->secret_read);
483
fprintf_plus(stderr,
484
"The number of imported secret keys: %d\n",
485
import_result->secret_imported);
486
fprintf_plus(stderr,
487
"The number of unchanged secret keys: %d\n",
488
import_result->secret_unchanged);
489
fprintf_plus(stderr, "The number of keys not imported: %d\n",
490
import_result->not_imported);
491
for(gpgme_import_status_t import_status
492
= import_result->imports;
493
import_status != NULL;
494
import_status = import_status->next){
495
fprintf_plus(stderr, "Import status for key: %s\n",
496
import_status->fpr);
497
if(import_status->result != GPG_ERR_NO_ERROR){
498
fprintf_plus(stderr, "Import result: %s: %s\n",
499
gpgme_strsource(import_status->result),
500
gpgme_strerror(import_status->result));
501
}
502
fprintf_plus(stderr, "Key status:\n");
503
fprintf_plus(stderr,
504
import_status->status & GPGME_IMPORT_NEW
505
? "The key was new.\n"
506
: "The key was not new.\n");
507
fprintf_plus(stderr,
508
import_status->status & GPGME_IMPORT_UID
509
? "The key contained new user IDs.\n"
510
: "The key did not contain new user IDs.\n");
511
fprintf_plus(stderr,
512
import_status->status & GPGME_IMPORT_SIG
513
? "The key contained new signatures.\n"
514
: "The key did not contain new signatures.\n");
515
fprintf_plus(stderr,
516
import_status->status & GPGME_IMPORT_SUBKEY
517
? "The key contained new sub keys.\n"
518
: "The key did not contain new sub keys.\n");
519
fprintf_plus(stderr,
520
import_status->status & GPGME_IMPORT_SECRET
521
? "The key contained a secret key.\n"
522
: "The key did not contain a secret key.\n");
523
}
524
return false;
525
}
526
}
282
527
283
ret = (int)TEMP_FAILURE_RETRY(close(fd));
528
ret = close(fd);
284
529
if(ret == -1){
285
530
perror_plus("close");
286
531
}
325
570
/* Create new GPGME "context" */
326
571
rc = gpgme_new(&(mc->ctx));
327
572
if(rc != GPG_ERR_NO_ERROR){
328
fprintf_plus(stderr, "Mandos plugin mandos-client: "
329
"bad gpgme_new: %s: %s\n", gpgme_strsource(rc),
330
gpgme_strerror(rc));
573
fprintf_plus(stderr, "bad gpgme_new: %s: %s\n",
574
gpgme_strsource(rc), gpgme_strerror(rc));
331
575
return false;
332
576
}
333
577
342
586
* Decrypt OpenPGP data.
343
587
* Returns -1 on error
344
588
*/
589
__attribute__((nonnull, warn_unused_result))
345
590
static ssize_t pgp_packet_decrypt(const char *cryptotext,
346
591
size_t crypto_size,
347
592
char **plaintext,
368
613
/* Create new empty GPGME data buffer for the plaintext */
369
614
rc = gpgme_data_new(&dh_plain);
370
615
if(rc != GPG_ERR_NO_ERROR){
371
fprintf_plus(stderr, "Mandos plugin mandos-client: "
372
"bad gpgme_data_new: %s: %s\n",
616
fprintf_plus(stderr, "bad gpgme_data_new: %s: %s\n",
373
617
gpgme_strsource(rc), gpgme_strerror(rc));
374
618
gpgme_data_release(dh_crypto);
375
619
return -1;
388
632
if(result == NULL){
389
633
fprintf_plus(stderr, "gpgme_op_decrypt_result failed\n");
390
634
} else {
391
fprintf_plus(stderr, "Unsupported algorithm: %s\n",
392
result->unsupported_algorithm);
393
fprintf_plus(stderr, "Wrong key usage: %u\n",
394
result->wrong_key_usage);
635
if(result->unsupported_algorithm != NULL) {
636
fprintf_plus(stderr, "Unsupported algorithm: %s\n",
637
result->unsupported_algorithm);
638
}
639
fprintf_plus(stderr, "Wrong key usage: %s\n",
640
result->wrong_key_usage ? "Yes" : "No");
395
641
if(result->file_name != NULL){
396
642
fprintf_plus(stderr, "File name: %s\n", result->file_name);
397
643
}
398
gpgme_recipient_t recipient;
399
recipient = result->recipients;
400
while(recipient != NULL){
644
645
for(gpgme_recipient_t r = result->recipients; r != NULL;
646
r = r->next){
401
647
fprintf_plus(stderr, "Public key algorithm: %s\n",
402
gpgme_pubkey_algo_name
403
(recipient->pubkey_algo));
404
fprintf_plus(stderr, "Key ID: %s\n", recipient->keyid);
648
gpgme_pubkey_algo_name(r->pubkey_algo));
649
fprintf_plus(stderr, "Key ID: %s\n", r->keyid);
405
650
fprintf_plus(stderr, "Secret key available: %s\n",
406
recipient->status == GPG_ERR_NO_SECKEY
407
? "No" : "Yes");
408
recipient = recipient->next;
651
r->status == GPG_ERR_NO_SECKEY ? "No" : "Yes");
409
652
}
410
653
}
411
654
}
467
710
return plaintext_length;
468
711
}
469
712
470
static const char * safer_gnutls_strerror(int value){
713
__attribute__((warn_unused_result, const))
714
static const char *safe_string(const char *str){
715
if(str == NULL)
716
return "(unknown)";
717
return str;
718
}
719
720
__attribute__((warn_unused_result))
721
static const char *safer_gnutls_strerror(int value){
471
722
const char *ret = gnutls_strerror(value);
472
if(ret == NULL)
473
ret = "(unknown)";
474
return ret;
723
return safe_string(ret);
475
724
}
476
725
477
726
/* GnuTLS log function callback */
727
__attribute__((nonnull))
478
728
static void debuggnutls(__attribute__((unused)) int level,
479
729
const char* string){
480
730
fprintf_plus(stderr, "GnuTLS: %s", string);
481
731
}
482
732
733
__attribute__((nonnull(1, 2, 4), warn_unused_result))
483
734
static int init_gnutls_global(const char *pubkeyfilename,
484
735
const char *seckeyfilename,
736
const char *dhparamsfilename,
485
737
mandos_context *mc){
486
738
int ret;
487
739
489
741
fprintf_plus(stderr, "Initializing GnuTLS\n");
490
742
}
491
743
492
ret = gnutls_global_init();
493
if(ret != GNUTLS_E_SUCCESS){
494
fprintf_plus(stderr, "GnuTLS global_init: %s\n",
495
safer_gnutls_strerror(ret));
496
return -1;
497
}
498
499
744
if(debug){
500
745
/* "Use a log level over 10 to enable all debugging options."
501
746
* - GnuTLS manual
509
754
if(ret != GNUTLS_E_SUCCESS){
510
755
fprintf_plus(stderr, "GnuTLS memory error: %s\n",
511
756
safer_gnutls_strerror(ret));
512
gnutls_global_deinit();
513
757
return -1;
514
758
}
515
759
516
760
if(debug){
517
fprintf_plus(stderr, "Attempting to use OpenPGP public key %s and"
518
" secret key %s as GnuTLS credentials\n",
761
fprintf_plus(stderr, "Attempting to use public key %s and"
762
" private key %s as GnuTLS credentials\n",
519
763
pubkeyfilename,
520
764
seckeyfilename);
521
765
}
522
766
767
#if GNUTLS_VERSION_NUMBER >= 0x030606
768
ret = gnutls_certificate_set_rawpk_key_file
769
(mc->cred, pubkeyfilename, seckeyfilename,
770
GNUTLS_X509_FMT_PEM, /* format */
771
NULL, /* pass */
772
/* key_usage */
773
GNUTLS_KEY_DIGITAL_SIGNATURE | GNUTLS_KEY_KEY_ENCIPHERMENT,
774
NULL, /* names */
775
0, /* names_length */
776
/* privkey_flags */
777
GNUTLS_PKCS_PLAIN | GNUTLS_PKCS_NULL_PASSWORD,
778
0); /* pkcs11_flags */
779
#elif GNUTLS_VERSION_NUMBER < 0x030600
523
780
ret = gnutls_certificate_set_openpgp_key_file
524
781
(mc->cred, pubkeyfilename, seckeyfilename,
525
782
GNUTLS_OPENPGP_FMT_BASE64);
783
#else
784
#error "Needs GnuTLS 3.6.6 or later, or before 3.6.0"
785
#endif
526
786
if(ret != GNUTLS_E_SUCCESS){
527
787
fprintf_plus(stderr,
528
"Error[%d] while reading the OpenPGP key pair ('%s',"
788
"Error[%d] while reading the key pair ('%s',"
529
789
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
530
790
fprintf_plus(stderr, "The GnuTLS error is: %s\n",
531
791
safer_gnutls_strerror(ret));
540
800
safer_gnutls_strerror(ret));
541
801
goto globalfail;
542
802
}
543
ret = gnutls_dh_params_generate2(mc->dh_params, mc->dh_bits);
544
if(ret != GNUTLS_E_SUCCESS){
545
fprintf_plus(stderr, "Error in GnuTLS prime generation: %s\n",
546
safer_gnutls_strerror(ret));
547
goto globalfail;
548
}
549
550
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
803
/* If a Diffie-Hellman parameters file was given, try to use it */
804
if(dhparamsfilename != NULL){
805
gnutls_datum_t params = { .data = NULL, .size = 0 };
806
do {
807
int dhpfile = open(dhparamsfilename, O_RDONLY);
808
if(dhpfile == -1){
809
perror_plus("open");
810
dhparamsfilename = NULL;
811
break;
812
}
813
size_t params_capacity = 0;
814
while(true){
815
params_capacity = incbuffer((char **)¶ms.data,
816
(size_t)params.size,
817
(size_t)params_capacity);
818
if(params_capacity == 0){
819
perror_plus("incbuffer");
820
free(params.data);
821
params.data = NULL;
822
dhparamsfilename = NULL;
823
break;
824
}
825
ssize_t bytes_read = read(dhpfile,
826
params.data + params.size,
827
BUFFER_SIZE);
828
/* EOF */
829
if(bytes_read == 0){
830
break;
831
}
832
/* check bytes_read for failure */
833
if(bytes_read < 0){
834
perror_plus("read");
835
free(params.data);
836
params.data = NULL;
837
dhparamsfilename = NULL;
838
break;
839
}
840
params.size += (unsigned int)bytes_read;
841
}
842
ret = close(dhpfile);
843
if(ret == -1){
844
perror_plus("close");
845
}
846
if(params.data == NULL){
847
dhparamsfilename = NULL;
848
}
849
if(dhparamsfilename == NULL){
850
break;
851
}
852
ret = gnutls_dh_params_import_pkcs3(mc->dh_params, ¶ms,
853
GNUTLS_X509_FMT_PEM);
854
if(ret != GNUTLS_E_SUCCESS){
855
fprintf_plus(stderr, "Failed to parse DH parameters in file"
856
" \"%s\": %s\n", dhparamsfilename,
857
safer_gnutls_strerror(ret));
858
dhparamsfilename = NULL;
859
}
860
free(params.data);
861
} while(false);
862
}
863
if(dhparamsfilename == NULL){
864
if(mc->dh_bits == 0){
865
#if GNUTLS_VERSION_NUMBER < 0x030600
866
/* Find out the optimal number of DH bits */
867
/* Try to read the private key file */
868
gnutls_datum_t buffer = { .data = NULL, .size = 0 };
869
do {
870
int secfile = open(seckeyfilename, O_RDONLY);
871
if(secfile == -1){
872
perror_plus("open");
873
break;
874
}
875
size_t buffer_capacity = 0;
876
while(true){
877
buffer_capacity = incbuffer((char **)&buffer.data,
878
(size_t)buffer.size,
879
(size_t)buffer_capacity);
880
if(buffer_capacity == 0){
881
perror_plus("incbuffer");
882
free(buffer.data);
883
buffer.data = NULL;
884
break;
885
}
886
ssize_t bytes_read = read(secfile,
887
buffer.data + buffer.size,
888
BUFFER_SIZE);
889
/* EOF */
890
if(bytes_read == 0){
891
break;
892
}
893
/* check bytes_read for failure */
894
if(bytes_read < 0){
895
perror_plus("read");
896
free(buffer.data);
897
buffer.data = NULL;
898
break;
899
}
900
buffer.size += (unsigned int)bytes_read;
901
}
902
close(secfile);
903
} while(false);
904
/* If successful, use buffer to parse private key */
905
gnutls_sec_param_t sec_param = GNUTLS_SEC_PARAM_ULTRA;
906
if(buffer.data != NULL){
907
{
908
gnutls_openpgp_privkey_t privkey = NULL;
909
ret = gnutls_openpgp_privkey_init(&privkey);
910
if(ret != GNUTLS_E_SUCCESS){
911
fprintf_plus(stderr, "Error initializing OpenPGP key"
912
" structure: %s",
913
safer_gnutls_strerror(ret));
914
free(buffer.data);
915
buffer.data = NULL;
916
} else {
917
ret = gnutls_openpgp_privkey_import
918
(privkey, &buffer, GNUTLS_OPENPGP_FMT_BASE64, "", 0);
919
if(ret != GNUTLS_E_SUCCESS){
920
fprintf_plus(stderr, "Error importing OpenPGP key : %s",
921
safer_gnutls_strerror(ret));
922
privkey = NULL;
923
}
924
free(buffer.data);
925
buffer.data = NULL;
926
if(privkey != NULL){
927
/* Use private key to suggest an appropriate
928
sec_param */
929
sec_param = gnutls_openpgp_privkey_sec_param(privkey);
930
gnutls_openpgp_privkey_deinit(privkey);
931
if(debug){
932
fprintf_plus(stderr, "This OpenPGP key implies using"
933
" a GnuTLS security parameter \"%s\".\n",
934
safe_string(gnutls_sec_param_get_name
935
(sec_param)));
936
}
937
}
938
}
939
}
940
if(sec_param == GNUTLS_SEC_PARAM_UNKNOWN){
941
/* Err on the side of caution */
942
sec_param = GNUTLS_SEC_PARAM_ULTRA;
943
if(debug){
944
fprintf_plus(stderr, "Falling back to security parameter"
945
" \"%s\"\n",
946
safe_string(gnutls_sec_param_get_name
947
(sec_param)));
948
}
949
}
950
}
951
unsigned int uret = gnutls_sec_param_to_pk_bits(GNUTLS_PK_DH, sec_param);
952
if(uret != 0){
953
mc->dh_bits = uret;
954
if(debug){
955
fprintf_plus(stderr, "A \"%s\" GnuTLS security parameter"
956
" implies %u DH bits; using that.\n",
957
safe_string(gnutls_sec_param_get_name
958
(sec_param)),
959
mc->dh_bits);
960
}
961
} else {
962
fprintf_plus(stderr, "Failed to get implied number of DH"
963
" bits for security parameter \"%s\"): %s\n",
964
safe_string(gnutls_sec_param_get_name
965
(sec_param)),
966
safer_gnutls_strerror(ret));
967
goto globalfail;
968
}
969
#endif
970
} else { /* dh_bits != 0 */
971
if(debug){
972
fprintf_plus(stderr, "DH bits explicitly set to %u\n",
973
mc->dh_bits);
974
}
975
ret = gnutls_dh_params_generate2(mc->dh_params, mc->dh_bits);
976
if(ret != GNUTLS_E_SUCCESS){
977
fprintf_plus(stderr, "Error in GnuTLS prime generation (%u"
978
" bits): %s\n", mc->dh_bits,
979
safer_gnutls_strerror(ret));
980
goto globalfail;
981
}
982
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
983
}
984
}
551
985
552
986
return 0;
553
987
554
988
globalfail:
555
989
556
990
gnutls_certificate_free_credentials(mc->cred);
557
gnutls_global_deinit();
558
991
gnutls_dh_params_deinit(mc->dh_params);
559
992
return -1;
560
993
}
561
994
995
__attribute__((nonnull, warn_unused_result))
562
996
static int init_gnutls_session(gnutls_session_t *session,
563
997
mandos_context *mc){
564
998
int ret;
565
999
/* GnuTLS session creation */
566
1000
do {
567
ret = gnutls_init(session, GNUTLS_SERVER);
1001
ret = gnutls_init(session, (GNUTLS_SERVER
1002
#if GNUTLS_VERSION_NUMBER >= 0x030506
1003
| GNUTLS_NO_TICKETS
1004
#endif
1005
#if GNUTLS_VERSION_NUMBER >= 0x030606
1006
| GNUTLS_ENABLE_RAWPK
1007
#endif
1008
));
568
1009
if(quit_now){
569
1010
return -1;
570
1011
}
611
1052
/* ignore client certificate if any. */
612
1053
gnutls_certificate_server_set_request(*session, GNUTLS_CERT_IGNORE);
613
1054
614
gnutls_dh_set_prime_bits(*session, mc->dh_bits);
615
616
1055
return 0;
617
1056
}
618
1057
620
1059
static void empty_log(__attribute__((unused)) AvahiLogLevel level,
621
1060
__attribute__((unused)) const char *txt){}
622
1061
1062
/* Helper function to add_local_route() and delete_local_route() */
1063
__attribute__((nonnull, warn_unused_result))
1064
static bool add_delete_local_route(const bool add,
1065
const char *address,
1066
AvahiIfIndex if_index){
1067
int ret;
1068
char helper[] = "mandos-client-iprouteadddel";
1069
char add_arg[] = "add";
1070
char delete_arg[] = "delete";
1071
char debug_flag[] = "--debug";
1072
char *pluginhelperdir = getenv("MANDOSPLUGINHELPERDIR");
1073
if(pluginhelperdir == NULL){
1074
if(debug){
1075
fprintf_plus(stderr, "MANDOSPLUGINHELPERDIR environment"
1076
" variable not set; cannot run helper\n");
1077
}
1078
return false;
1079
}
1080
1081
char interface[IF_NAMESIZE];
1082
if(if_indextoname((unsigned int)if_index, interface) == NULL){
1083
perror_plus("if_indextoname");
1084
return false;
1085
}
1086
1087
int devnull = (int)TEMP_FAILURE_RETRY(open("/dev/null", O_RDONLY));
1088
if(devnull == -1){
1089
perror_plus("open(\"/dev/null\", O_RDONLY)");
1090
return false;
1091
}
1092
pid_t pid = fork();
1093
if(pid == 0){
1094
/* Child */
1095
/* Raise privileges */
1096
errno = raise_privileges_permanently();
1097
if(errno != 0){
1098
perror_plus("Failed to raise privileges");
1099
/* _exit(EX_NOPERM); */
1100
} else {
1101
/* Set group */
1102
errno = 0;
1103
ret = setgid(0);
1104
if(ret == -1){
1105
perror_plus("setgid");
1106
close(devnull);
1107
_exit(EX_NOPERM);
1108
}
1109
/* Reset supplementary groups */
1110
errno = 0;
1111
ret = setgroups(0, NULL);
1112
if(ret == -1){
1113
perror_plus("setgroups");
1114
close(devnull);
1115
_exit(EX_NOPERM);
1116
}
1117
}
1118
ret = dup2(devnull, STDIN_FILENO);
1119
if(ret == -1){
1120
perror_plus("dup2(devnull, STDIN_FILENO)");
1121
close(devnull);
1122
_exit(EX_OSERR);
1123
}
1124
ret = close(devnull);
1125
if(ret == -1){
1126
perror_plus("close");
1127
}
1128
ret = dup2(STDERR_FILENO, STDOUT_FILENO);
1129
if(ret == -1){
1130
perror_plus("dup2(STDERR_FILENO, STDOUT_FILENO)");
1131
_exit(EX_OSERR);
1132
}
1133
int helperdir_fd = (int)TEMP_FAILURE_RETRY(open(pluginhelperdir,
1134
O_RDONLY
1135
| O_DIRECTORY
1136
| O_PATH
1137
| O_CLOEXEC));
1138
if(helperdir_fd == -1){
1139
perror_plus("open");
1140
_exit(EX_UNAVAILABLE);
1141
}
1142
int helper_fd = (int)TEMP_FAILURE_RETRY(openat(helperdir_fd,
1143
helper, O_RDONLY));
1144
if(helper_fd == -1){
1145
perror_plus("openat");
1146
close(helperdir_fd);
1147
_exit(EX_UNAVAILABLE);
1148
}
1149
close(helperdir_fd);
1150
#ifdef __GNUC__
1151
#pragma GCC diagnostic push
1152
#pragma GCC diagnostic ignored "-Wcast-qual"
1153
#endif
1154
if(fexecve(helper_fd, (char *const [])
1155
{ helper, add ? add_arg : delete_arg, (char *)address,
1156
interface, debug ? debug_flag : NULL, NULL },
1157
environ) == -1){
1158
#ifdef __GNUC__
1159
#pragma GCC diagnostic pop
1160
#endif
1161
perror_plus("fexecve");
1162
_exit(EXIT_FAILURE);
1163
}
1164
}
1165
if(pid == -1){
1166
perror_plus("fork");
1167
close(devnull);
1168
return false;
1169
}
1170
ret = close(devnull);
1171
if(ret == -1){
1172
perror_plus("close");
1173
}
1174
int status;
1175
pid_t pret = -1;
1176
errno = 0;
1177
do {
1178
pret = waitpid(pid, &status, 0);
1179
if(pret == -1 and errno == EINTR and quit_now){
1180
int errno_raising = 0;
1181
if((errno = raise_privileges()) != 0){
1182
errno_raising = errno;
1183
perror_plus("Failed to raise privileges in order to"
1184
" kill helper program");
1185
}
1186
if(kill(pid, SIGTERM) == -1){
1187
perror_plus("kill");
1188
}
1189
if((errno_raising == 0) and (errno = lower_privileges()) != 0){
1190
perror_plus("Failed to lower privileges after killing"
1191
" helper program");
1192
}
1193
return false;
1194
}
1195
} while(pret == -1 and errno == EINTR);
1196
if(pret == -1){
1197
perror_plus("waitpid");
1198
return false;
1199
}
1200
if(WIFEXITED(status)){
1201
if(WEXITSTATUS(status) != 0){
1202
fprintf_plus(stderr, "Error: iprouteadddel exited"
1203
" with status %d\n", WEXITSTATUS(status));
1204
return false;
1205
}
1206
return true;
1207
}
1208
if(WIFSIGNALED(status)){
1209
fprintf_plus(stderr, "Error: iprouteadddel died by"
1210
" signal %d\n", WTERMSIG(status));
1211
return false;
1212
}
1213
fprintf_plus(stderr, "Error: iprouteadddel crashed\n");
1214
return false;
1215
}
1216
1217
__attribute__((nonnull, warn_unused_result))
1218
static bool add_local_route(const char *address,
1219
AvahiIfIndex if_index){
1220
if(debug){
1221
fprintf_plus(stderr, "Adding route to %s\n", address);
1222
}
1223
return add_delete_local_route(true, address, if_index);
1224
}
1225
1226
__attribute__((nonnull, warn_unused_result))
1227
static bool delete_local_route(const char *address,
1228
AvahiIfIndex if_index){
1229
if(debug){
1230
fprintf_plus(stderr, "Removing route to %s\n", address);
1231
}
1232
return add_delete_local_route(false, address, if_index);
1233
}
1234
623
1235
/* Called when a Mandos server is found */
1236
__attribute__((nonnull, warn_unused_result))
624
1237
static int start_mandos_communication(const char *ip, in_port_t port,
625
1238
AvahiIfIndex if_index,
626
1239
int af, mandos_context *mc){
627
1240
int ret, tcp_sd = -1;
628
1241
ssize_t sret;
629
union {
630
struct sockaddr_in in;
631
struct sockaddr_in6 in6;
632
} to;
1242
struct sockaddr_storage to;
633
1243
char *buffer = NULL;
634
1244
char *decrypted_buffer = NULL;
635
1245
size_t buffer_length = 0;
638
1248
int retval = -1;
639
1249
gnutls_session_t session;
640
1250
int pf; /* Protocol family */
1251
bool route_added = false;
641
1252
642
1253
errno = 0;
643
1254
665
1276
bool match = false;
666
1277
{
667
1278
char *interface = NULL;
668
while((interface=argz_next(mc->interfaces, mc->interfaces_size,
669
interface))){
1279
while((interface = argz_next(mc->interfaces,
1280
mc->interfaces_size,
1281
interface))){
670
1282
if(if_nametoindex(interface) == (unsigned int)if_index){
671
1283
match = true;
672
1284
break;
701
1313
PRIuMAX "\n", ip, (uintmax_t)port);
702
1314
}
703
1315
704
tcp_sd = socket(pf, SOCK_STREAM, 0);
1316
tcp_sd = socket(pf, SOCK_STREAM | SOCK_CLOEXEC, 0);
705
1317
if(tcp_sd < 0){
706
1318
int e = errno;
707
1319
perror_plus("socket");
714
1326
goto mandos_end;
715
1327
}
716
1328
717
memset(&to, 0, sizeof(to));
718
1329
if(af == AF_INET6){
719
to.in6.sin6_family = (sa_family_t)af;
720
ret = inet_pton(af, ip, &to.in6.sin6_addr);
1330
struct sockaddr_in6 *to6 = (struct sockaddr_in6 *)&to;
1331
*to6 = (struct sockaddr_in6){ .sin6_family = (sa_family_t)af };
1332
ret = inet_pton(af, ip, &to6->sin6_addr);
721
1333
} else { /* IPv4 */
722
to.in.sin_family = (sa_family_t)af;
723
ret = inet_pton(af, ip, &to.in.sin_addr);
1334
struct sockaddr_in *to4 = (struct sockaddr_in *)&to;
1335
*to4 = (struct sockaddr_in){ .sin_family = (sa_family_t)af };
1336
ret = inet_pton(af, ip, &to4->sin_addr);
724
1337
}
725
1338
if(ret < 0 ){
726
1339
int e = errno;
735
1348
goto mandos_end;
736
1349
}
737
1350
if(af == AF_INET6){
738
to.in6.sin6_port = htons(port);
739
if(IN6_IS_ADDR_LINKLOCAL /* Spurious warnings from */
740
(&to.in6.sin6_addr)){ /* -Wstrict-aliasing=2 or lower and
741
-Wunreachable-code*/
1351
((struct sockaddr_in6 *)&to)->sin6_port = htons(port);
1352
if(IN6_IS_ADDR_LINKLOCAL
1353
(&((struct sockaddr_in6 *)&to)->sin6_addr)){
742
1354
if(if_index == AVAHI_IF_UNSPEC){
743
1355
fprintf_plus(stderr, "An IPv6 link-local address is"
744
1356
" incomplete without a network interface\n");
746
1358
goto mandos_end;
747
1359
}
748
1360
/* Set the network interface number as scope */
749
to.in6.sin6_scope_id = (uint32_t)if_index;
1361
((struct sockaddr_in6 *)&to)->sin6_scope_id = (uint32_t)if_index;
750
1362
}
751
1363
} else {
752
to.in.sin_port = htons(port); /* Spurious warnings from
753
-Wconversion and
754
-Wunreachable-code */
1364
((struct sockaddr_in *)&to)->sin_port = htons(port);
755
1365
}
756
1366
757
1367
if(quit_now){
774
1384
}
775
1385
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
776
1386
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
777
const char *pcret;
778
if(af == AF_INET6){
779
pcret = inet_ntop(af, &(to.in6.sin6_addr), addrstr,
780
sizeof(addrstr));
781
} else {
782
pcret = inet_ntop(af, &(to.in.sin_addr), addrstr,
783
sizeof(addrstr));
784
}
785
if(pcret == NULL){
786
perror_plus("inet_ntop");
787
} else {
788
if(strcmp(addrstr, ip) != 0){
789
fprintf_plus(stderr, "Canonical address form: %s\n", addrstr);
790
}
791
}
792
}
793
794
if(quit_now){
795
errno = EINTR;
796
goto mandos_end;
797
}
798
799
if(af == AF_INET6){
800
ret = connect(tcp_sd, &to.in6, sizeof(to));
801
} else {
802
ret = connect(tcp_sd, &to.in, sizeof(to)); /* IPv4 */
803
}
804
if(ret < 0){
805
if ((errno != ECONNREFUSED and errno != ENETUNREACH) or debug){
806
int e = errno;
807
perror_plus("connect");
808
errno = e;
809
}
810
goto mandos_end;
811
}
812
813
if(quit_now){
814
errno = EINTR;
815
goto mandos_end;
1387
if(af == AF_INET6){
1388
ret = getnameinfo((struct sockaddr *)&to,
1389
sizeof(struct sockaddr_in6),
1390
addrstr, sizeof(addrstr), NULL, 0,
1391
NI_NUMERICHOST);
1392
} else {
1393
ret = getnameinfo((struct sockaddr *)&to,
1394
sizeof(struct sockaddr_in),
1395
addrstr, sizeof(addrstr), NULL, 0,
1396
NI_NUMERICHOST);
1397
}
1398
if(ret == EAI_SYSTEM){
1399
perror_plus("getnameinfo");
1400
} else if(ret != 0) {
1401
fprintf_plus(stderr, "getnameinfo: %s", gai_strerror(ret));
1402
} else if(strcmp(addrstr, ip) != 0){
1403
fprintf_plus(stderr, "Canonical address form: %s\n", addrstr);
1404
}
1405
}
1406
1407
if(quit_now){
1408
errno = EINTR;
1409
goto mandos_end;
1410
}
1411
1412
while(true){
1413
if(af == AF_INET6){
1414
ret = connect(tcp_sd, (struct sockaddr *)&to,
1415
sizeof(struct sockaddr_in6));
1416
} else {
1417
ret = connect(tcp_sd, (struct sockaddr *)&to, /* IPv4 */
1418
sizeof(struct sockaddr_in));
1419
}
1420
if(ret < 0){
1421
if(((errno == ENETUNREACH) or (errno == EHOSTUNREACH))
1422
and if_index != AVAHI_IF_UNSPEC
1423
and connect_to == NULL
1424
and not route_added and
1425
((af == AF_INET6 and not
1426
IN6_IS_ADDR_LINKLOCAL(&(((struct sockaddr_in6 *)
1427
&to)->sin6_addr)))
1428
or (af == AF_INET and
1429
/* Not a a IPv4LL address */
1430
(ntohl(((struct sockaddr_in *)&to)->sin_addr.s_addr)
1431
& 0xFFFF0000L) != 0xA9FE0000L))){
1432
/* Work around Avahi bug - Avahi does not announce link-local
1433
addresses if it has a global address, so local hosts with
1434
*only* a link-local address (e.g. Mandos clients) cannot
1435
connect to a Mandos server announced by Avahi on a server
1436
host with a global address. Work around this by retrying
1437
with an explicit route added with the server's address.
1438
1439
Avahi bug reference:
1440
https://lists.freedesktop.org/archives/avahi/2010-February/001833.html
1441
https://bugs.debian.org/587961
1442
*/
1443
if(debug){
1444
fprintf_plus(stderr, "Mandos server unreachable, trying"
1445
" direct route\n");
1446
}
1447
int e = errno;
1448
route_added = add_local_route(ip, if_index);
1449
if(route_added){
1450
continue;
1451
}
1452
errno = e;
1453
}
1454
if(errno != ECONNREFUSED or debug){
1455
int e = errno;
1456
perror_plus("connect");
1457
errno = e;
1458
}
1459
goto mandos_end;
1460
}
1461
1462
if(quit_now){
1463
errno = EINTR;
1464
goto mandos_end;
1465
}
1466
break;
816
1467
}
817
1468
818
1469
const char *out = mandos_protocol_version;
972
1623
&decrypted_buffer, mc);
973
1624
if(decrypted_buffer_size >= 0){
974
1625
1626
clearerr(stdout);
975
1627
written = 0;
976
1628
while(written < (size_t) decrypted_buffer_size){
977
1629
if(quit_now){
993
1645
}
994
1646
written += (size_t)ret;
995
1647
}
1648
ret = fflush(stdout);
1649
if(ret != 0){
1650
int e = errno;
1651
if(debug){
1652
fprintf_plus(stderr, "Error writing encrypted data: %s\n",
1653
strerror(errno));
1654
}
1655
errno = e;
1656
goto mandos_end;
1657
}
996
1658
retval = 0;
997
1659
}
998
1660
}
1001
1663
1002
1664
mandos_end:
1003
1665
{
1666
if(route_added){
1667
if(not delete_local_route(ip, if_index)){
1668
fprintf_plus(stderr, "Failed to delete local route to %s on"
1669
" interface %d", ip, if_index);
1670
}
1671
}
1004
1672
int e = errno;
1005
1673
free(decrypted_buffer);
1006
1674
free(buffer);
1007
1675
if(tcp_sd >= 0){
1008
ret = (int)TEMP_FAILURE_RETRY(close(tcp_sd));
1676
ret = close(tcp_sd);
1009
1677
}
1010
1678
if(ret == -1){
1011
1679
if(e == 0){
1036
1704
AVAHI_GCC_UNUSED AvahiStringList *txt,
1037
1705
AVAHI_GCC_UNUSED AvahiLookupResultFlags
1038
1706
flags,
1039
void* mc){
1707
void *mc){
1040
1708
if(r == NULL){
1041
1709
return;
1042
1710
}
1045
1713
timed out */
1046
1714
1047
1715
if(quit_now){
1716
avahi_s_service_resolver_free(r);
1048
1717
return;
1049
1718
}
1050
1719
1095
1764
const char *domain,
1096
1765
AVAHI_GCC_UNUSED AvahiLookupResultFlags
1097
1766
flags,
1098
void* mc){
1767
void *mc){
1099
1768
if(b == NULL){
1100
1769
return;
1101
1770
}
1161
1830
errno = old_errno;
1162
1831
}
1163
1832
1833
__attribute__((nonnull, warn_unused_result))
1164
1834
bool get_flags(const char *ifname, struct ifreq *ifr){
1165
1835
int ret;
1166
error_t ret_errno;
1836
int old_errno;
1167
1837
1168
1838
int s = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1169
1839
if(s < 0){
1170
ret_errno = errno;
1840
old_errno = errno;
1171
1841
perror_plus("socket");
1172
errno = ret_errno;
1842
errno = old_errno;
1173
1843
return false;
1174
1844
}
1175
strcpy(ifr->ifr_name, ifname);
1845
strncpy(ifr->ifr_name, ifname, IF_NAMESIZE);
1846
ifr->ifr_name[IF_NAMESIZE-1] = '\0'; /* NUL terminate */
1176
1847
ret = ioctl(s, SIOCGIFFLAGS, ifr);
1177
1848
if(ret == -1){
1178
1849
if(debug){
1179
ret_errno = errno;
1850
old_errno = errno;
1180
1851
perror_plus("ioctl SIOCGIFFLAGS");
1181
errno = ret_errno;
1852
errno = old_errno;
1853
}
1854
if((close(s) == -1) and debug){
1855
old_errno = errno;
1856
perror_plus("close");
1857
errno = old_errno;
1182
1858
}
1183
1859
return false;
1184
1860
}
1861
if((close(s) == -1) and debug){
1862
old_errno = errno;
1863
perror_plus("close");
1864
errno = old_errno;
1865
}
1185
1866
return true;
1186
1867
}
1187
1868
1869
__attribute__((nonnull, warn_unused_result))
1188
1870
bool good_flags(const char *ifname, const struct ifreq *ifr){
1189
1871
1190
1872
/* Reject the loopback device */
1232
1914
* corresponds to an acceptable network device.
1233
1915
* (This function is passed to scandir(3) as a filter function.)
1234
1916
*/
1917
__attribute__((nonnull, warn_unused_result))
1235
1918
int good_interface(const struct dirent *if_entry){
1236
1919
if(if_entry->d_name[0] == '.'){
1237
1920
return 0;
1255
1938
/*
1256
1939
* This function determines if a network interface is up.
1257
1940
*/
1941
__attribute__((nonnull, warn_unused_result))
1258
1942
bool interface_is_up(const char *interface){
1259
1943
struct ifreq ifr;
1260
1944
if(not get_flags(interface, &ifr)){
1271
1955
/*
1272
1956
* This function determines if a network interface is running
1273
1957
*/
1958
__attribute__((nonnull, warn_unused_result))
1274
1959
bool interface_is_running(const char *interface){
1275
1960
struct ifreq ifr;
1276
1961
if(not get_flags(interface, &ifr)){
1284
1969
return (bool)(ifr.ifr_flags & IFF_RUNNING);
1285
1970
}
1286
1971
1972
__attribute__((nonnull, pure, warn_unused_result))
1287
1973
int notdotentries(const struct dirent *direntry){
1288
1974
/* Skip "." and ".." */
1289
1975
if(direntry->d_name[0] == '.'
1296
1982
}
1297
1983
1298
1984
/* Is this directory entry a runnable program? */
1985
__attribute__((nonnull, warn_unused_result))
1299
1986
int runnable_hook(const struct dirent *direntry){
1300
1987
int ret;
1301
1988
size_t sret;
1309
1996
sret = strspn(direntry->d_name, "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
1310
1997
"abcdefghijklmnopqrstuvwxyz"
1311
1998
"0123456789"
1312
"_-");
1999
"_.-");
1313
2000
if((direntry->d_name)[sret] != '\0'){
1314
2001
/* Contains non-allowed characters */
1315
2002
if(debug){
1319
2006
return 0;
1320
2007
}
1321
2008
1322
char *fullname = NULL;
1323
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1324
if(ret < 0){
1325
perror_plus("asprintf");
1326
return 0;
1327
}
1328
1329
ret = stat(fullname, &st);
2009
ret = fstatat(hookdir_fd, direntry->d_name, &st, 0);
1330
2010
if(ret == -1){
1331
2011
if(debug){
1332
2012
perror_plus("Could not stat hook");
1356
2036
return 1;
1357
2037
}
1358
2038
2039
__attribute__((nonnull, warn_unused_result))
1359
2040
int avahi_loop_with_timeout(AvahiSimplePoll *s, int retry_interval,
1360
2041
mandos_context *mc){
1361
2042
int ret;
1365
2046
1366
2047
while(true){
1367
2048
if(mc->current_server == NULL){
1368
if (debug){
2049
if(debug){
1369
2050
fprintf_plus(stderr, "Wait until first server is found."
1370
2051
" No timeout!\n");
1371
2052
}
1372
2053
ret = avahi_simple_poll_iterate(s, -1);
1373
2054
} else {
1374
if (debug){
2055
if(debug){
1375
2056
fprintf_plus(stderr, "Check current_server if we should run"
1376
2057
" it, or wait\n");
1377
2058
}
1394
2075
- ((intmax_t)waited_time.tv_sec * 1000))
1395
2076
- ((intmax_t)waited_time.tv_nsec / 1000000));
1396
2077
1397
if (debug){
2078
if(debug){
1398
2079
fprintf_plus(stderr, "Blocking for %" PRIdMAX " ms\n",
1399
2080
block_time);
1400
2081
}
1422
2103
ret = avahi_simple_poll_iterate(s, (int)block_time);
1423
2104
}
1424
2105
if(ret != 0){
1425
if (ret > 0 or errno != EINTR){
2106
if(ret > 0 or errno != EINTR){
1426
2107
return (ret != 1) ? ret : 0;
1427
2108
}
1428
2109
}
1429
2110
}
1430
2111
}
1431
2112
1432
/* Set effective uid to 0, return errno */
1433
error_t raise_privileges(void){
1434
error_t old_errno = errno;
1435
error_t ret_errno = 0;
1436
if(seteuid(0) == -1){
1437
ret_errno = errno;
1438
perror_plus("seteuid");
1439
}
1440
errno = old_errno;
1441
return ret_errno;
1442
}
1443
1444
/* Set effective and real user ID to 0. Return errno. */
1445
error_t raise_privileges_permanently(void){
1446
error_t old_errno = errno;
1447
error_t ret_errno = raise_privileges();
1448
if(ret_errno != 0){
1449
errno = old_errno;
1450
return ret_errno;
1451
}
1452
if(setuid(0) == -1){
1453
ret_errno = errno;
1454
perror_plus("seteuid");
1455
}
1456
errno = old_errno;
1457
return ret_errno;
1458
}
1459
1460
/* Set effective user ID to unprivileged saved user ID */
1461
error_t lower_privileges(void){
1462
error_t old_errno = errno;
1463
error_t ret_errno = 0;
1464
if(seteuid(uid) == -1){
1465
ret_errno = errno;
1466
perror_plus("seteuid");
1467
}
1468
errno = old_errno;
1469
return ret_errno;
1470
}
1471
1472
/* Lower privileges permanently */
1473
error_t lower_privileges_permanently(void){
1474
error_t old_errno = errno;
1475
error_t ret_errno = 0;
1476
if(setuid(uid) == -1){
1477
ret_errno = errno;
1478
perror_plus("setuid");
1479
}
1480
errno = old_errno;
1481
return ret_errno;
1482
}
1483
1484
bool run_network_hooks(const char *mode, const char *interface,
2113
__attribute__((nonnull))
2114
void run_network_hooks(const char *mode, const char *interface,
1485
2115
const float delay){
1486
struct dirent **direntries;
2116
struct dirent **direntries = NULL;
2117
if(hookdir_fd == -1){
2118
hookdir_fd = open(hookdir, O_RDONLY | O_DIRECTORY | O_PATH
2119
| O_CLOEXEC);
2120
if(hookdir_fd == -1){
2121
if(errno == ENOENT){
2122
if(debug){
2123
fprintf_plus(stderr, "Network hook directory \"%s\" not"
2124
" found\n", hookdir);
2125
}
2126
} else {
2127
perror_plus("open");
2128
}
2129
return;
2130
}
2131
}
2132
int devnull = (int)TEMP_FAILURE_RETRY(open("/dev/null", O_RDONLY));
2133
if(devnull == -1){
2134
perror_plus("open(\"/dev/null\", O_RDONLY)");
2135
return;
2136
}
2137
int numhooks = scandirat(hookdir_fd, ".", &direntries,
2138
runnable_hook, alphasort);
2139
if(numhooks == -1){
2140
perror_plus("scandir");
2141
close(devnull);
2142
return;
2143
}
1487
2144
struct dirent *direntry;
1488
2145
int ret;
1489
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1490
alphasort);
1491
if(numhooks == -1){
1492
if(errno == ENOENT){
1493
if(debug){
1494
fprintf_plus(stderr, "Network hook directory \"%s\" not"
1495
" found\n", hookdir);
1496
}
1497
} else {
1498
perror_plus("scandir");
2146
for(int i = 0; i < numhooks; i++){
2147
direntry = direntries[i];
2148
if(debug){
2149
fprintf_plus(stderr, "Running network hook \"%s\"\n",
2150
direntry->d_name);
1499
2151
}
1500
} else {
1501
int devnull = open("/dev/null", O_RDONLY);
1502
for(int i = 0; i < numhooks; i++){
1503
direntry = direntries[i];
1504
char *fullname = NULL;
1505
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1506
if(ret < 0){
2152
pid_t hook_pid = fork();
2153
if(hook_pid == 0){
2154
/* Child */
2155
/* Raise privileges */
2156
errno = raise_privileges_permanently();
2157
if(errno != 0){
2158
perror_plus("Failed to raise privileges");
2159
_exit(EX_NOPERM);
2160
}
2161
/* Set group */
2162
errno = 0;
2163
ret = setgid(0);
2164
if(ret == -1){
2165
perror_plus("setgid");
2166
_exit(EX_NOPERM);
2167
}
2168
/* Reset supplementary groups */
2169
errno = 0;
2170
ret = setgroups(0, NULL);
2171
if(ret == -1){
2172
perror_plus("setgroups");
2173
_exit(EX_NOPERM);
2174
}
2175
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
2176
if(ret == -1){
2177
perror_plus("setenv");
2178
_exit(EX_OSERR);
2179
}
2180
ret = setenv("DEVICE", interface, 1);
2181
if(ret == -1){
2182
perror_plus("setenv");
2183
_exit(EX_OSERR);
2184
}
2185
ret = setenv("VERBOSITY", debug ? "1" : "0", 1);
2186
if(ret == -1){
2187
perror_plus("setenv");
2188
_exit(EX_OSERR);
2189
}
2190
ret = setenv("MODE", mode, 1);
2191
if(ret == -1){
2192
perror_plus("setenv");
2193
_exit(EX_OSERR);
2194
}
2195
char *delaystring;
2196
ret = asprintf(&delaystring, "%f", (double)delay);
2197
if(ret == -1){
1507
2198
perror_plus("asprintf");
1508
continue;
1509
}
1510
if(debug){
1511
fprintf_plus(stderr, "Running network hook \"%s\"\n",
1512
direntry->d_name);
1513
}
1514
pid_t hook_pid = fork();
1515
if(hook_pid == 0){
1516
/* Child */
1517
/* Raise privileges */
1518
raise_privileges_permanently();
1519
/* Set group */
1520
errno = 0;
1521
ret = setgid(0);
1522
if(ret == -1){
1523
perror_plus("setgid");
1524
}
1525
/* Reset supplementary groups */
1526
errno = 0;
1527
ret = setgroups(0, NULL);
1528
if(ret == -1){
1529
perror_plus("setgroups");
1530
}
1531
dup2(devnull, STDIN_FILENO);
1532
close(devnull);
1533
dup2(STDERR_FILENO, STDOUT_FILENO);
1534
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1535
if(ret == -1){
1536
perror_plus("setenv");
1537
_exit(EX_OSERR);
1538
}
1539
ret = setenv("DEVICE", interface, 1);
1540
if(ret == -1){
1541
perror_plus("setenv");
1542
_exit(EX_OSERR);
1543
}
1544
ret = setenv("VERBOSITY", debug ? "1" : "0", 1);
1545
if(ret == -1){
1546
perror_plus("setenv");
1547
_exit(EX_OSERR);
1548
}
1549
ret = setenv("MODE", mode, 1);
1550
if(ret == -1){
1551
perror_plus("setenv");
1552
_exit(EX_OSERR);
1553
}
1554
char *delaystring;
1555
ret = asprintf(&delaystring, "%f", delay);
1556
if(ret == -1){
1557
perror_plus("asprintf");
1558
_exit(EX_OSERR);
1559
}
1560
ret = setenv("DELAY", delaystring, 1);
1561
if(ret == -1){
1562
free(delaystring);
1563
perror_plus("setenv");
1564
_exit(EX_OSERR);
1565
}
2199
_exit(EX_OSERR);
2200
}
2201
ret = setenv("DELAY", delaystring, 1);
2202
if(ret == -1){
1566
2203
free(delaystring);
1567
if(connect_to != NULL){
1568
ret = setenv("CONNECT", connect_to, 1);
1569
if(ret == -1){
1570
perror_plus("setenv");
1571
_exit(EX_OSERR);
1572
}
1573
}
1574
if(execl(fullname, direntry->d_name, mode, NULL) == -1){
1575
perror_plus("execl");
1576
_exit(EXIT_FAILURE);
1577
}
2204
perror_plus("setenv");
2205
_exit(EX_OSERR);
2206
}
2207
free(delaystring);
2208
if(connect_to != NULL){
2209
ret = setenv("CONNECT", connect_to, 1);
2210
if(ret == -1){
2211
perror_plus("setenv");
2212
_exit(EX_OSERR);
2213
}
2214
}
2215
int hook_fd = (int)TEMP_FAILURE_RETRY(openat(hookdir_fd,
2216
direntry->d_name,
2217
O_RDONLY));
2218
if(hook_fd == -1){
2219
perror_plus("openat");
2220
_exit(EXIT_FAILURE);
2221
}
2222
if(close(hookdir_fd) == -1){
2223
perror_plus("close");
2224
_exit(EXIT_FAILURE);
2225
}
2226
ret = dup2(devnull, STDIN_FILENO);
2227
if(ret == -1){
2228
perror_plus("dup2(devnull, STDIN_FILENO)");
2229
_exit(EX_OSERR);
2230
}
2231
ret = close(devnull);
2232
if(ret == -1){
2233
perror_plus("close");
2234
_exit(EX_OSERR);
2235
}
2236
ret = dup2(STDERR_FILENO, STDOUT_FILENO);
2237
if(ret == -1){
2238
perror_plus("dup2(STDERR_FILENO, STDOUT_FILENO)");
2239
_exit(EX_OSERR);
2240
}
2241
if(fexecve(hook_fd, (char *const []){ direntry->d_name, NULL },
2242
environ) == -1){
2243
perror_plus("fexecve");
2244
_exit(EXIT_FAILURE);
2245
}
2246
} else {
2247
if(hook_pid == -1){
2248
perror_plus("fork");
2249
free(direntry);
2250
continue;
2251
}
2252
int status;
2253
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
2254
perror_plus("waitpid");
2255
free(direntry);
2256
continue;
2257
}
2258
if(WIFEXITED(status)){
2259
if(WEXITSTATUS(status) != 0){
2260
fprintf_plus(stderr, "Warning: network hook \"%s\" exited"
2261
" with status %d\n", direntry->d_name,
2262
WEXITSTATUS(status));
2263
free(direntry);
2264
continue;
2265
}
2266
} else if(WIFSIGNALED(status)){
2267
fprintf_plus(stderr, "Warning: network hook \"%s\" died by"
2268
" signal %d\n", direntry->d_name,
2269
WTERMSIG(status));
2270
free(direntry);
2271
continue;
1578
2272
} else {
1579
int status;
1580
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
1581
perror_plus("waitpid");
1582
free(fullname);
1583
continue;
1584
}
1585
if(WIFEXITED(status)){
1586
if(WEXITSTATUS(status) != 0){
1587
fprintf_plus(stderr, "Warning: network hook \"%s\" exited"
1588
" with status %d\n", direntry->d_name,
1589
WEXITSTATUS(status));
1590
free(fullname);
1591
continue;
1592
}
1593
} else if(WIFSIGNALED(status)){
1594
fprintf_plus(stderr, "Warning: network hook \"%s\" died by"
1595
" signal %d\n", direntry->d_name,
1596
WTERMSIG(status));
1597
free(fullname);
1598
continue;
1599
} else {
1600
fprintf_plus(stderr, "Warning: network hook \"%s\""
1601
" crashed\n", direntry->d_name);
1602
free(fullname);
1603
continue;
1604
}
1605
}
1606
free(fullname);
1607
if(debug){
1608
fprintf_plus(stderr, "Network hook \"%s\" ran successfully\n",
1609
direntry->d_name);
1610
}
1611
}
1612
close(devnull);
1613
}
1614
return true;
2273
fprintf_plus(stderr, "Warning: network hook \"%s\""
2274
" crashed\n", direntry->d_name);
2275
free(direntry);
2276
continue;
2277
}
2278
}
2279
if(debug){
2280
fprintf_plus(stderr, "Network hook \"%s\" ran successfully\n",
2281
direntry->d_name);
2282
}
2283
free(direntry);
2284
}
2285
free(direntries);
2286
if(close(hookdir_fd) == -1){
2287
perror_plus("close");
2288
} else {
2289
hookdir_fd = -1;
2290
}
2291
close(devnull);
1615
2292
}
1616
2293
1617
error_t bring_up_interface(const char *const interface,
1618
const float delay){
1619
int sd = -1;
1620
error_t old_errno = errno;
1621
error_t ret_errno = 0;
1622
int ret, ret_setflags;
2294
__attribute__((nonnull, warn_unused_result))
2295
int bring_up_interface(const char *const interface,
2296
const float delay){
2297
int old_errno = errno;
2298
int ret;
1623
2299
struct ifreq network;
1624
2300
unsigned int if_index = if_nametoindex(interface);
1625
2301
if(if_index == 0){
1634
2310
}
1635
2311
1636
2312
if(not interface_is_up(interface)){
1637
if(not get_flags(interface, &network) and debug){
2313
int ret_errno = 0;
2314
int ioctl_errno = 0;
2315
if(not get_flags(interface, &network)){
1638
2316
ret_errno = errno;
1639
2317
fprintf_plus(stderr, "Failed to get flags for interface "
1640
2318
"\"%s\"\n", interface);
2319
errno = old_errno;
1641
2320
return ret_errno;
1642
2321
}
1643
network.ifr_flags |= IFF_UP;
2322
network.ifr_flags |= IFF_UP; /* set flag */
1644
2323
1645
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1646
if(sd < 0){
2324
int sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
2325
if(sd == -1){
1647
2326
ret_errno = errno;
1648
2327
perror_plus("socket");
1649
2328
errno = old_errno;
1650
2329
return ret_errno;
1651
2330
}
1652
2331
1653
2332
if(quit_now){
1654
close(sd);
2333
ret = close(sd);
2334
if(ret == -1){
2335
perror_plus("close");
2336
}
1655
2337
errno = old_errno;
1656
2338
return EINTR;
1657
2339
}
1661
2343
interface);
1662
2344
}
1663
2345
1664
/* Raise priviliges */
1665
raise_privileges();
2346
/* Raise privileges */
2347
ret_errno = raise_privileges();
2348
if(ret_errno != 0){
2349
errno = ret_errno;
2350
perror_plus("Failed to raise privileges");
2351
}
1666
2352
1667
2353
#ifdef __linux__
1668
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1669
messages about the network interface to mess up the prompt */
1670
int ret_linux = klogctl(8, NULL, 5);
1671
bool restore_loglevel = true;
1672
if(ret_linux == -1){
1673
restore_loglevel = false;
1674
perror_plus("klogctl");
2354
int ret_linux;
2355
bool restore_loglevel = false;
2356
if(ret_errno == 0){
2357
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
2358
messages about the network interface to mess up the prompt */
2359
ret_linux = klogctl(8, NULL, 5);
2360
if(ret_linux == -1){
2361
perror_plus("klogctl");
2362
} else {
2363
restore_loglevel = true;
2364
}
1675
2365
}
1676
2366
#endif /* __linux__ */
1677
ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1678
ret_errno = errno;
2367
int ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
2368
ioctl_errno = errno;
1679
2369
#ifdef __linux__
1680
2370
if(restore_loglevel){
1681
2371
ret_linux = klogctl(7, NULL, 0);
1685
2375
}
1686
2376
#endif /* __linux__ */
1687
2377
1688
/* Lower privileges */
1689
lower_privileges();
2378
/* If raise_privileges() succeeded above */
2379
if(ret_errno == 0){
2380
/* Lower privileges */
2381
ret_errno = lower_privileges();
2382
if(ret_errno != 0){
2383
errno = ret_errno;
2384
perror_plus("Failed to lower privileges");
2385
}
2386
}
1690
2387
1691
2388
/* Close the socket */
1692
ret = (int)TEMP_FAILURE_RETRY(close(sd));
2389
ret = close(sd);
1693
2390
if(ret == -1){
1694
2391
perror_plus("close");
1695
2392
}
1696
2393
1697
2394
if(ret_setflags == -1){
1698
errno = ret_errno;
2395
errno = ioctl_errno;
1699
2396
perror_plus("ioctl SIOCSIFFLAGS +IFF_UP");
1700
2397
errno = old_errno;
1701
return ret_errno;
2398
return ioctl_errno;
1702
2399
}
1703
2400
} else if(debug){
1704
2401
fprintf_plus(stderr, "Interface \"%s\" is already up; good\n",
1707
2404
1708
2405
/* Sleep checking until interface is running.
1709
2406
Check every 0.25s, up to total time of delay */
1710
for(int i=0; i < delay * 4; i++){
2407
for(int i = 0; i < delay * 4; i++){
1711
2408
if(interface_is_running(interface)){
1712
2409
break;
1713
2410
}
1722
2419
return 0;
1723
2420
}
1724
2421
1725
error_t take_down_interface(const char *const interface){
1726
int sd = -1;
1727
error_t old_errno = errno;
1728
error_t ret_errno = 0;
1729
int ret, ret_setflags;
2422
__attribute__((nonnull, warn_unused_result))
2423
int take_down_interface(const char *const interface){
2424
int old_errno = errno;
1730
2425
struct ifreq network;
1731
2426
unsigned int if_index = if_nametoindex(interface);
1732
2427
if(if_index == 0){
1735
2430
return ENXIO;
1736
2431
}
1737
2432
if(interface_is_up(interface)){
2433
int ret_errno = 0;
2434
int ioctl_errno = 0;
1738
2435
if(not get_flags(interface, &network) and debug){
1739
2436
ret_errno = errno;
1740
2437
fprintf_plus(stderr, "Failed to get flags for interface "
1741
2438
"\"%s\"\n", interface);
2439
errno = old_errno;
1742
2440
return ret_errno;
1743
2441
}
1744
2442
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
1745
2443
1746
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1747
if(sd < 0){
2444
int sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
2445
if(sd == -1){
1748
2446
ret_errno = errno;
1749
2447
perror_plus("socket");
1750
2448
errno = old_errno;
1756
2454
interface);
1757
2455
}
1758
2456
1759
/* Raise priviliges */
1760
raise_privileges();
1761
1762
ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1763
ret_errno = errno;
1764
1765
/* Lower privileges */
1766
lower_privileges();
2457
/* Raise privileges */
2458
ret_errno = raise_privileges();
2459
if(ret_errno != 0){
2460
errno = ret_errno;
2461
perror_plus("Failed to raise privileges");
2462
}
2463
2464
int ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
2465
ioctl_errno = errno;
2466
2467
/* If raise_privileges() succeeded above */
2468
if(ret_errno == 0){
2469
/* Lower privileges */
2470
ret_errno = lower_privileges();
2471
if(ret_errno != 0){
2472
errno = ret_errno;
2473
perror_plus("Failed to lower privileges");
2474
}
2475
}
1767
2476
1768
2477
/* Close the socket */
1769
ret = (int)TEMP_FAILURE_RETRY(close(sd));
2478
int ret = close(sd);
1770
2479
if(ret == -1){
1771
2480
perror_plus("close");
1772
2481
}
1773
2482
1774
2483
if(ret_setflags == -1){
1775
errno = ret_errno;
2484
errno = ioctl_errno;
1776
2485
perror_plus("ioctl SIOCSIFFLAGS -IFF_UP");
1777
2486
errno = old_errno;
1778
return ret_errno;
2487
return ioctl_errno;
1779
2488
}
1780
2489
} else if(debug){
1781
2490
fprintf_plus(stderr, "Interface \"%s\" is already down; odd\n",
1787
2496
}
1788
2497
1789
2498
int main(int argc, char *argv[]){
1790
mandos_context mc = { .server = NULL, .dh_bits = 1024,
1791
.priority = "SECURE256:!CTYPE-X.509:"
1792
"+CTYPE-OPENPGP", .current_server = NULL,
1793
.interfaces = NULL, .interfaces_size = 0 };
2499
mandos_context mc = { .server = NULL, .dh_bits = 0,
2500
#if GNUTLS_VERSION_NUMBER >= 0x030606
2501
.priority = "SECURE128:!CTYPE-X.509"
2502
":+CTYPE-RAWPK:!RSA:!VERS-ALL:+VERS-TLS1.3"
2503
":%PROFILE_ULTRA",
2504
#elif GNUTLS_VERSION_NUMBER < 0x030600
2505
.priority = "SECURE256:!CTYPE-X.509"
2506
":+CTYPE-OPENPGP:!RSA:+SIGN-DSA-SHA256",
2507
#else
2508
#error "Needs GnuTLS 3.6.6 or later, or before 3.6.0"
2509
#endif
2510
.current_server = NULL, .interfaces = NULL,
2511
.interfaces_size = 0 };
1794
2512
AvahiSServiceBrowser *sb = NULL;
1795
2513
error_t ret_errno;
1796
2514
int ret;
1799
2517
int exitcode = EXIT_SUCCESS;
1800
2518
char *interfaces_to_take_down = NULL;
1801
2519
size_t interfaces_to_take_down_size = 0;
1802
char tempdir[] = "/tmp/mandosXXXXXX";
1803
bool tempdir_created = false;
2520
char run_tempdir[] = "/run/tmp/mandosXXXXXX";
2521
char old_tempdir[] = "/tmp/mandosXXXXXX";
2522
char *tempdir = NULL;
1804
2523
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
1805
2524
const char *seckey = PATHDIR "/" SECKEY;
1806
2525
const char *pubkey = PATHDIR "/" PUBKEY;
2526
#if GNUTLS_VERSION_NUMBER >= 0x030606
2527
const char *tls_privkey = PATHDIR "/" TLS_PRIVKEY;
2528
const char *tls_pubkey = PATHDIR "/" TLS_PUBKEY;
2529
#endif
2530
const char *dh_params_file = NULL;
1807
2531
char *interfaces_hooks = NULL;
1808
size_t interfaces_hooks_size = 0;
1809
2532
1810
2533
bool gnutls_initialized = false;
1811
2534
bool gpgme_initialized = false;
1857
2580
{ .name = "pubkey", .key = 'p',
1858
2581
.arg = "FILE",
1859
2582
.doc = "OpenPGP public key file base name",
1860
.group = 2 },
2583
.group = 1 },
2584
{ .name = "tls-privkey", .key = 't',
2585
.arg = "FILE",
2586
#if GNUTLS_VERSION_NUMBER >= 0x030606
2587
.doc = "TLS private key file base name",
2588
#else
2589
.doc = "Dummy; ignored (requires GnuTLS 3.6.6)",
2590
#endif
2591
.group = 1 },
2592
{ .name = "tls-pubkey", .key = 'T',
2593
.arg = "FILE",
2594
#if GNUTLS_VERSION_NUMBER >= 0x030606
2595
.doc = "TLS public key file base name",
2596
#else
2597
.doc = "Dummy; ignored (requires GnuTLS 3.6.6)",
2598
#endif
2599
.group = 1 },
1861
2600
{ .name = "dh-bits", .key = 129,
1862
2601
.arg = "BITS",
1863
2602
.doc = "Bit length of the prime number used in the"
1864
2603
" Diffie-Hellman key exchange",
1865
2604
.group = 2 },
2605
{ .name = "dh-params", .key = 134,
2606
.arg = "FILE",
2607
.doc = "PEM-encoded PKCS#3 file with pre-generated parameters"
2608
" for the Diffie-Hellman key exchange",
2609
.group = 2 },
1866
2610
{ .name = "priority", .key = 130,
1867
2611
.arg = "STRING",
1868
2612
.doc = "GnuTLS priority string for the TLS handshake",
1914
2658
case 'p': /* --pubkey */
1915
2659
pubkey = arg;
1916
2660
break;
2661
case 't': /* --tls-privkey */
2662
#if GNUTLS_VERSION_NUMBER >= 0x030606
2663
tls_privkey = arg;
2664
#endif
2665
break;
2666
case 'T': /* --tls-pubkey */
2667
#if GNUTLS_VERSION_NUMBER >= 0x030606
2668
tls_pubkey = arg;
2669
#endif
2670
break;
1917
2671
case 129: /* --dh-bits */
1918
2672
errno = 0;
1919
2673
tmpmax = strtoimax(arg, &tmp, 10);
1923
2677
}
1924
2678
mc.dh_bits = (typeof(mc.dh_bits))tmpmax;
1925
2679
break;
2680
case 134: /* --dh-params */
2681
dh_params_file = arg;
2682
break;
1926
2683
case 130: /* --priority */
1927
2684
mc.priority = arg;
1928
2685
break;
1951
2708
argp_state_help(state, state->out_stream,
1952
2709
(ARGP_HELP_STD_HELP | ARGP_HELP_EXIT_ERR)
1953
2710
& ~(unsigned int)ARGP_HELP_EXIT_OK);
2711
__builtin_unreachable();
1954
2712
case -3: /* --usage */
1955
2713
argp_state_help(state, state->out_stream,
1956
2714
ARGP_HELP_USAGE | ARGP_HELP_EXIT_ERR);
2715
__builtin_unreachable();
1957
2716
case 'V': /* --version */
1958
2717
fprintf_plus(state->out_stream, "%s\n", argp_program_version);
1959
2718
exit(argp_err_exit_status);
1968
2727
.args_doc = "",
1969
2728
.doc = "Mandos client -- Get and decrypt"
1970
2729
" passwords from a Mandos server" };
1971
ret = argp_parse(&argp, argc, argv,
1972
ARGP_IN_ORDER | ARGP_NO_HELP, 0, NULL);
1973
switch(ret){
2730
ret_errno = argp_parse(&argp, argc, argv,
2731
ARGP_IN_ORDER | ARGP_NO_HELP, 0, NULL);
2732
switch(ret_errno){
1974
2733
case 0:
1975
2734
break;
1976
2735
case ENOMEM:
1977
2736
default:
1978
errno = ret;
2737
errno = ret_errno;
1979
2738
perror_plus("argp_parse");
1980
2739
exitcode = EX_OSERR;
1981
2740
goto end;
1984
2743
goto end;
1985
2744
}
1986
2745
}
1987
2746
1988
2747
{
1989
/* Work around Debian bug #633582:
1990
<http://bugs.debian.org/633582> */
1991
1992
/* Re-raise priviliges */
1993
if(raise_privileges() == 0){
2748
/* Re-raise privileges */
2749
ret = raise_privileges();
2750
if(ret != 0){
2751
errno = ret;
2752
perror_plus("Failed to raise privileges");
2753
} else {
1994
2754
struct stat st;
1995
2755
2756
/* Work around Debian bug #633582:
2757
<https://bugs.debian.org/633582> */
2758
1996
2759
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
1997
2760
int seckey_fd = open(seckey, O_RDONLY);
1998
2761
if(seckey_fd == -1){
2010
2773
}
2011
2774
}
2012
2775
}
2013
TEMP_FAILURE_RETRY(close(seckey_fd));
2776
close(seckey_fd);
2014
2777
}
2015
2778
}
2016
2779
2017
2780
if(strcmp(pubkey, PATHDIR "/" PUBKEY) == 0){
2018
2781
int pubkey_fd = open(pubkey, O_RDONLY);
2019
2782
if(pubkey_fd == -1){
2031
2794
}
2032
2795
}
2033
2796
}
2034
TEMP_FAILURE_RETRY(close(pubkey_fd));
2035
}
2036
}
2037
2797
close(pubkey_fd);
2798
}
2799
}
2800
2801
if(dh_params_file != NULL
2802
and strcmp(dh_params_file, PATHDIR "/dhparams.pem" ) == 0){
2803
int dhparams_fd = open(dh_params_file, O_RDONLY);
2804
if(dhparams_fd == -1){
2805
perror_plus("open");
2806
} else {
2807
ret = (int)TEMP_FAILURE_RETRY(fstat(dhparams_fd, &st));
2808
if(ret == -1){
2809
perror_plus("fstat");
2810
} else {
2811
if(S_ISREG(st.st_mode)
2812
and st.st_uid == 0 and st.st_gid == 0){
2813
ret = fchown(dhparams_fd, uid, gid);
2814
if(ret == -1){
2815
perror_plus("fchown");
2816
}
2817
}
2818
}
2819
close(dhparams_fd);
2820
}
2821
}
2822
2823
/* Work around Debian bug #981302
2824
<https://bugs.debian.org/981302> */
2825
if(lstat("/dev/fd", &st) != 0 and errno == ENOENT){
2826
ret = symlink("/proc/self/fd", "/dev/fd");
2827
if(ret == -1){
2828
perror_plus("Failed to create /dev/fd symlink");
2829
}
2830
}
2831
2038
2832
/* Lower privileges */
2039
lower_privileges();
2833
ret = lower_privileges();
2834
if(ret != 0){
2835
errno = ret;
2836
perror_plus("Failed to lower privileges");
2837
}
2040
2838
}
2041
2839
}
2042
2840
2066
2864
goto end;
2067
2865
}
2068
2866
memcpy(interfaces_hooks, mc.interfaces, mc.interfaces_size);
2069
interfaces_hooks_size = mc.interfaces_size;
2070
argz_stringify(interfaces_hooks, interfaces_hooks_size,
2071
(int)',');
2072
}
2073
if(not run_network_hooks("start", interfaces_hooks != NULL ?
2074
interfaces_hooks : "", delay)){
2075
goto end;
2076
}
2867
argz_stringify(interfaces_hooks, mc.interfaces_size, (int)',');
2868
}
2869
run_network_hooks("start", interfaces_hooks != NULL ?
2870
interfaces_hooks : "", delay);
2077
2871
}
2078
2872
2079
2873
if(not debug){
2157
2951
2158
2952
/* If no interfaces were specified, make a list */
2159
2953
if(mc.interfaces == NULL){
2160
struct dirent **direntries;
2954
struct dirent **direntries = NULL;
2161
2955
/* Look for any good interfaces */
2162
2956
ret = scandir(sys_class_net, &direntries, good_interface,
2163
2957
alphasort);
2167
2961
ret_errno = argz_add(&mc.interfaces, &mc.interfaces_size,
2168
2962
direntries[i]->d_name);
2169
2963
if(ret_errno != 0){
2964
errno = ret_errno;
2170
2965
perror_plus("argz_add");
2966
free(direntries[i]);
2171
2967
continue;
2172
2968
}
2173
2969
if(debug){
2174
2970
fprintf_plus(stderr, "Will use interface \"%s\"\n",
2175
2971
direntries[i]->d_name);
2176
2972
}
2973
free(direntries[i]);
2177
2974
}
2178
2975
free(direntries);
2179
2976
} else {
2180
free(direntries);
2977
if(ret == 0){
2978
free(direntries);
2979
}
2181
2980
fprintf_plus(stderr, "Could not find a network interface\n");
2182
2981
exitcode = EXIT_FAILURE;
2183
2982
goto end;
2206
3005
break;
2207
3006
}
2208
3007
bool interface_was_up = interface_is_up(interface);
2209
ret = bring_up_interface(interface, delay);
3008
errno = bring_up_interface(interface, delay);
2210
3009
if(not interface_was_up){
2211
if(ret != 0){
2212
errno = ret;
2213
perror_plus("Failed to bring up interface");
3010
if(errno != 0){
3011
fprintf_plus(stderr, "Failed to bring up interface \"%s\":"
3012
" %s\n", interface, strerror(errno));
2214
3013
} else {
2215
ret_errno = argz_add(&interfaces_to_take_down,
2216
&interfaces_to_take_down_size,
2217
interface);
3014
errno = argz_add(&interfaces_to_take_down,
3015
&interfaces_to_take_down_size,
3016
interface);
3017
if(errno != 0){
3018
perror_plus("argz_add");
3019
}
2218
3020
}
2219
3021
}
2220
3022
}
2236
3038
goto end;
2237
3039
}
2238
3040
2239
ret = init_gnutls_global(pubkey, seckey, &mc);
3041
#if GNUTLS_VERSION_NUMBER >= 0x030606
3042
ret = init_gnutls_global(tls_pubkey, tls_privkey, dh_params_file, &mc);
3043
#elif GNUTLS_VERSION_NUMBER < 0x030600
3044
ret = init_gnutls_global(pubkey, seckey, dh_params_file, &mc);
3045
#else
3046
#error "Needs GnuTLS 3.6.6 or later, or before 3.6.0"
3047
#endif
2240
3048
if(ret == -1){
2241
3049
fprintf_plus(stderr, "init_gnutls_global failed\n");
2242
3050
exitcode = EX_UNAVAILABLE;
2249
3057
goto end;
2250
3058
}
2251
3059
2252
if(mkdtemp(tempdir) == NULL){
3060
/* Try /run/tmp before /tmp */
3061
tempdir = mkdtemp(run_tempdir);
3062
if(tempdir == NULL and errno == ENOENT){
3063
if(debug){
3064
fprintf_plus(stderr, "Tempdir %s did not work, trying %s\n",
3065
run_tempdir, old_tempdir);
3066
}
3067
tempdir = mkdtemp(old_tempdir);
3068
}
3069
if(tempdir == NULL){
2253
3070
perror_plus("mkdtemp");
2254
3071
goto end;
2255
3072
}
2256
tempdir_created = true;
2257
3073
2258
3074
if(quit_now){
2259
3075
goto end;
2331
3147
fprintf_plus(stderr, "Retrying in %d seconds\n",
2332
3148
(int)retry_interval);
2333
3149
}
2334
sleep((int)retry_interval);
3150
sleep((unsigned int)retry_interval);
2335
3151
}
2336
3152
2337
if (not quit_now){
3153
if(not quit_now){
2338
3154
exitcode = EXIT_SUCCESS;
2339
3155
}
2340
3156
2356
3172
2357
3173
/* Allocate a new server */
2358
3174
mc.server = avahi_server_new(avahi_simple_poll_get(simple_poll),
2359
&config, NULL, NULL, &ret_errno);
3175
&config, NULL, NULL, &ret);
2360
3176
2361
3177
/* Free the Avahi configuration data */
2362
3178
avahi_server_config_free(&config);
2365
3181
/* Check if creating the Avahi server object succeeded */
2366
3182
if(mc.server == NULL){
2367
3183
fprintf_plus(stderr, "Failed to create Avahi server: %s\n",
2368
avahi_strerror(ret_errno));
3184
avahi_strerror(ret));
2369
3185
exitcode = EX_UNAVAILABLE;
2370
3186
goto end;
2371
3187
}
2395
3211
if(debug){
2396
3212
fprintf_plus(stderr, "Starting Avahi loop search\n");
2397
3213
}
2398
3214
2399
3215
ret = avahi_loop_with_timeout(simple_poll,
2400
3216
(int)(retry_interval * 1000), &mc);
2401
3217
if(debug){
2406
3222
end:
2407
3223
2408
3224
if(debug){
2409
fprintf_plus(stderr, "%s exiting\n", argv[0]);
3225
if(signal_received){
3226
fprintf_plus(stderr, "%s exiting due to signal %d: %s\n",
3227
argv[0], signal_received,
3228
strsignal(signal_received));
3229
} else {
3230
fprintf_plus(stderr, "%s exiting\n", argv[0]);
3231
}
2410
3232
}
2411
3233
2412
3234
/* Cleanup things */
2423
3245
2424
3246
if(gnutls_initialized){
2425
3247
gnutls_certificate_free_credentials(mc.cred);
2426
gnutls_global_deinit();
2427
3248
gnutls_dh_params_deinit(mc.dh_params);
2428
3249
}
2429
3250
2437
3258
mc.current_server->prev->next = NULL;
2438
3259
while(mc.current_server != NULL){
2439
3260
server *next = mc.current_server->next;
3261
#ifdef __GNUC__
3262
#pragma GCC diagnostic push
3263
#pragma GCC diagnostic ignored "-Wcast-qual"
3264
#endif
3265
free((char *)(mc.current_server->ip));
3266
#ifdef __GNUC__
3267
#pragma GCC diagnostic pop
3268
#endif
2440
3269
free(mc.current_server);
2441
3270
mc.current_server = next;
2442
3271
}
2443
3272
}
2444
3273
2445
/* Re-raise priviliges */
3274
/* Re-raise privileges */
2446
3275
{
2447
raise_privileges();
2448
2449
/* Run network hooks */
2450
run_network_hooks("stop", interfaces_hooks != NULL ?
2451
interfaces_hooks : "", delay);
2452
2453
/* Take down the network interfaces which were brought up */
2454
{
2455
char *interface = NULL;
2456
while((interface=argz_next(interfaces_to_take_down,
2457
interfaces_to_take_down_size,
2458
interface))){
2459
ret_errno = take_down_interface(interface);
2460
if(ret_errno != 0){
2461
errno = ret_errno;
2462
perror_plus("Failed to take down interface");
2463
}
2464
}
2465
if(debug and (interfaces_to_take_down == NULL)){
2466
fprintf_plus(stderr, "No interfaces needed to be taken"
2467
" down\n");
2468
}
2469
}
2470
2471
lower_privileges_permanently();
3276
ret = raise_privileges();
3277
if(ret != 0){
3278
errno = ret;
3279
perror_plus("Failed to raise privileges");
3280
} else {
3281
3282
/* Run network hooks */
3283
run_network_hooks("stop", interfaces_hooks != NULL ?
3284
interfaces_hooks : "", delay);
3285
3286
/* Take down the network interfaces which were brought up */
3287
{
3288
char *interface = NULL;
3289
while((interface = argz_next(interfaces_to_take_down,
3290
interfaces_to_take_down_size,
3291
interface))){
3292
ret = take_down_interface(interface);
3293
if(ret != 0){
3294
errno = ret;
3295
perror_plus("Failed to take down interface");
3296
}
3297
}
3298
if(debug and (interfaces_to_take_down == NULL)){
3299
fprintf_plus(stderr, "No interfaces needed to be taken"
3300
" down\n");
3301
}
3302
}
3303
}
3304
3305
ret = lower_privileges_permanently();
3306
if(ret != 0){
3307
errno = ret;
3308
perror_plus("Failed to lower privileges permanently");
3309
}
2472
3310
}
2473
3311
2474
3312
free(interfaces_to_take_down);
2475
3313
free(interfaces_hooks);
2476
3314
3315
void clean_dir_at(int base, const char * const dirname,
3316
uintmax_t level){
3317
struct dirent **direntries = NULL;
3318
int dret;
3319
int dir_fd = (int)TEMP_FAILURE_RETRY(openat(base, dirname,
3320
O_RDONLY
3321
| O_NOFOLLOW
3322
| O_DIRECTORY
3323
| O_PATH));
3324
if(dir_fd == -1){
3325
perror_plus("open");
3326
return;
3327
}
3328
int numentries = scandirat(dir_fd, ".", &direntries,
3329
notdotentries, alphasort);
3330
if(numentries >= 0){
3331
for(int i = 0; i < numentries; i++){
3332
if(debug){
3333
fprintf_plus(stderr, "Unlinking \"%s/%s\"\n",
3334
dirname, direntries[i]->d_name);
3335
}
3336
dret = unlinkat(dir_fd, direntries[i]->d_name, 0);
3337
if(dret == -1){
3338
if(errno == EISDIR){
3339
dret = unlinkat(dir_fd, direntries[i]->d_name,
3340
AT_REMOVEDIR);
3341
}
3342
if((dret == -1) and (errno == ENOTEMPTY)
3343
and (strcmp(direntries[i]->d_name, "private-keys-v1.d")
3344
== 0) and (level == 0)){
3345
/* Recurse only in this special case */
3346
clean_dir_at(dir_fd, direntries[i]->d_name, level+1);
3347
dret = 0;
3348
}
3349
if((dret == -1) and (errno != ENOENT)){
3350
fprintf_plus(stderr, "unlink(\"%s/%s\"): %s\n", dirname,
3351
direntries[i]->d_name, strerror(errno));
3352
}
3353
}
3354
free(direntries[i]);
3355
}
3356
3357
/* need to clean even if 0 because man page doesn't specify */
3358
free(direntries);
3359
dret = unlinkat(base, dirname, AT_REMOVEDIR);
3360
if(dret == -1 and errno != ENOENT){
3361
perror_plus("rmdir");
3362
}
3363
} else {
3364
perror_plus("scandirat");
3365
}
3366
close(dir_fd);
3367
}
3368
2477
3369
/* Removes the GPGME temp directory and all files inside */
2478
if(tempdir_created){
2479
struct dirent **direntries = NULL;
2480
struct dirent *direntry = NULL;
2481
int numentries = scandir(tempdir, &direntries, notdotentries,
2482
alphasort);
2483
if (numentries > 0){
2484
for(int i = 0; i < numentries; i++){
2485
direntry = direntries[i];
2486
char *fullname = NULL;
2487
ret = asprintf(&fullname, "%s/%s", tempdir,
2488
direntry->d_name);
2489
if(ret < 0){
2490
perror_plus("asprintf");
2491
continue;
2492
}
2493
ret = remove(fullname);
2494
if(ret == -1){
2495
fprintf_plus(stderr, "remove(\"%s\"): %s\n", fullname,
2496
strerror(errno));
2497
}
2498
free(fullname);
2499
}
2500
}
2501
2502
/* need to clean even if 0 because man page doesn't specify */
2503
free(direntries);
2504
if (numentries == -1){
2505
perror_plus("scandir");
2506
}
2507
ret = rmdir(tempdir);
2508
if(ret == -1 and errno != ENOENT){
2509
perror_plus("rmdir");
2510
}
3370
if(tempdir != NULL){
3371
clean_dir_at(-1, tempdir, 0);
2511
3372
}
2512
3373
2513
3374
if(quit_now){
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0