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- Committer: Teddy Hogeborn
- Date: 2015-07-20 03:03:33 UTC
- Revision ID: teddy@recompile.se-20150720030333-203m2aeblypcsfte
Bug fix for GnuTLS 3: be compatible with old 2048-bit DSA keys.
The mandos-keygen program in Mandos version 1.6.0 and older generated
2048-bit DSA keys, and when GnuTLS uses these it has trouble
connecting using the Mandos default priority string. This was
previously fixed in Mandos 1.6.2, but the bug reappeared when using
GnuTLS 3, so the default priority string has to change again; this
time also the Mandos client has to change its default, so now the
server and the client should use the same default priority string:
SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA:+SIGN-DSA-SHA256
* mandos (main/server_defaults): Changed default priority string.
* mandos-options.xml (/section/para[id="priority_compat"]): Removed.
(/section/para[id="priority"]): Changed default priority string.
* mandos.conf ([DEFAULT]/priority): - '' -
* mandos.conf.xml (OPTIONS/priority): Refer to the id "priority"
instead of "priority_compat".
* mandos.xml (OPTIONS/--priority): - '' -
* plugins.d/mandos-client.c (main): Changed default priority string.
The mandos-keygen program in Mandos version 1.6.0 and older generated
2048-bit DSA keys, and when GnuTLS uses these it has trouble
connecting using the Mandos default priority string. This was
previously fixed in Mandos 1.6.2, but the bug reappeared when using
GnuTLS 3, so the default priority string has to change again; this
time also the Mandos client has to change its default, so now the
server and the client should use the same default priority string:
SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA:+SIGN-DSA-SHA256
* mandos (main/server_defaults): Changed default priority string.
* mandos-options.xml (/section/para[id="priority_compat"]): Removed.
(/section/para[id="priority"]): Changed default priority string.
* mandos.conf ([DEFAULT]/priority): - '' -
* mandos.conf.xml (OPTIONS/priority): Refer to the id "priority"
instead of "priority_compat".
* mandos.xml (OPTIONS/--priority): - '' -
* plugins.d/mandos-client.c (main): Changed default priority string.
- files added:
- DBUS-API
- debian/po
- debian/source
- debian/upstream
- network-hooks.d
- plugin-helpers
- files removed:
- etc-plugins.d-README
- files modified:
- .bzrignore
added
removed
plugin-runner.c
1
/* -*- coding: utf-8 -*- */
1
/* -*- coding: utf-8; mode: c; mode: orgtbl -*- */
2
2
/*
3
3
* Mandos plugin runner - Run Mandos plugins
4
4
*
5
* Copyright © 2007-2008 Teddy Hogeborn & Björn Påhlsson
5
* Copyright © 2008-2014 Teddy Hogeborn
6
* Copyright © 2008-2014 Björn Påhlsson
6
7
*
7
8
* This program is free software: you can redistribute it and/or
8
9
* modify it under the terms of the GNU General Public License as
18
19
* along with this program. If not, see
19
20
* <http://www.gnu.org/licenses/>.
20
21
*
21
* Contact the authors at <mandos@fukt.bsnet.se>.
22
* Contact the authors at <mandos@recompile.se>.
22
23
*/
23
24
24
25
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), getline(),
25
asprintf() */
26
O_CLOEXEC, pipe2() */
26
27
#include <stddef.h> /* size_t, NULL */
27
#include <stdlib.h> /* malloc(), exit(), EXIT_FAILURE,
28
EXIT_SUCCESS, realloc() */
28
#include <stdlib.h> /* malloc(), exit(), EXIT_SUCCESS,
29
realloc() */
29
30
#include <stdbool.h> /* bool, true, false */
30
#include <stdio.h> /* perror, popen(), fileno(),
31
fprintf(), stderr, STDOUT_FILENO */
32
#include <sys/types.h> /* DIR, opendir(), stat(), struct
33
stat, waitpid(), WIFEXITED(),
34
WEXITSTATUS(), wait(), pid_t,
35
uid_t, gid_t, getuid(), getgid(),
36
dirfd() */
31
#include <stdio.h> /* fileno(), fprintf(),
32
stderr, STDOUT_FILENO, fclose() */
33
#include <sys/types.h> /* fstat(), struct stat, waitpid(),
34
WIFEXITED(), WEXITSTATUS(), wait(),
35
pid_t, uid_t, gid_t, getuid(),
36
getgid() */
37
37
#include <sys/select.h> /* fd_set, select(), FD_ZERO(),
38
38
FD_SET(), FD_ISSET(), FD_CLR */
39
39
#include <sys/wait.h> /* wait(), waitpid(), WIFEXITED(),
40
WEXITSTATUS() */
41
#include <sys/stat.h> /* struct stat, stat(), S_ISREG() */
40
WEXITSTATUS(), WTERMSIG(),
41
WCOREDUMP() */
42
#include <sys/stat.h> /* struct stat, fstat(), S_ISREG() */
42
43
#include <iso646.h> /* and, or, not */
43
#include <dirent.h> /* DIR, struct dirent, opendir(),
44
readdir(), closedir(), dirfd() */
45
#include <unistd.h> /* struct stat, stat(), S_ISREG(),
46
fcntl(), setuid(), setgid(),
47
F_GETFD, F_SETFD, FD_CLOEXEC,
48
access(), pipe(), fork(), close()
49
dup2, STDOUT_FILENO, _exit(),
50
execv(), write(), read(),
51
close() */
44
#include <dirent.h> /* struct dirent, scandirat() */
45
#include <unistd.h> /* fcntl(), F_GETFD, F_SETFD,
46
FD_CLOEXEC, write(), STDOUT_FILENO,
47
struct stat, fstat(), close(),
48
setgid(), setuid(), S_ISREG(),
49
faccessat() pipe2(), fork(),
50
_exit(), dup2(), fexecve(), read()
51
*/
52
52
#include <fcntl.h> /* fcntl(), F_GETFD, F_SETFD,
53
FD_CLOEXEC */
54
#include <string.h> /* strsep, strlen(), asprintf() */
53
FD_CLOEXEC, openat(), scandirat(),
54
pipe2() */
55
#include <string.h> /* strsep, strlen(), strsignal(),
56
strcmp(), strncmp() */
55
57
#include <errno.h> /* errno */
56
58
#include <argp.h> /* struct argp_option, struct
57
59
argp_state, struct argp,
61
63
#include <signal.h> /* struct sigaction, sigemptyset(),
62
64
sigaddset(), sigaction(),
63
65
sigprocmask(), SIG_BLOCK, SIGCHLD,
64
SIG_UNBLOCK, kill() */
66
SIG_UNBLOCK, kill(), sig_atomic_t
67
*/
65
68
#include <errno.h> /* errno, EBADF */
69
#include <inttypes.h> /* intmax_t, PRIdMAX, strtoimax() */
70
#include <sysexits.h> /* EX_OSERR, EX_USAGE, EX_IOERR,
71
EX_CONFIG, EX_UNAVAILABLE, EX_OK */
72
#include <errno.h> /* errno */
73
#include <error.h> /* error() */
74
#include <fnmatch.h> /* fnmatch() */
66
75
67
76
#define BUFFER_SIZE 256
68
77
69
78
#define PDIR "/lib/mandos/plugins.d"
79
#define PHDIR "/lib/mandos/plugin-helpers"
70
80
#define AFILE "/conf/conf.d/mandos/plugin-runner.conf"
71
81
72
const char *argp_program_version = "plugin-runner 1.0";
73
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
82
const char *argp_program_version = "plugin-runner " VERSION;
83
const char *argp_program_bug_address = "<mandos@recompile.se>";
74
84
75
85
typedef struct plugin{
76
86
char *name; /* can be NULL or any plugin name */
79
89
char **environ;
80
90
int envc;
81
91
bool disabled;
82
92
83
93
/* Variables used for running processes*/
84
94
pid_t pid;
85
95
int fd;
87
97
size_t buffer_size;
88
98
size_t buffer_length;
89
99
bool eof;
90
volatile bool completed;
91
volatile int status;
100
volatile sig_atomic_t completed;
101
int status;
92
102
struct plugin *next;
93
103
} plugin;
94
104
96
106
97
107
/* Gets an existing plugin based on name,
98
108
or if none is found, creates a new one */
109
__attribute__((warn_unused_result))
99
110
static plugin *getplugin(char *name){
100
/* Check for exiting plugin with that name */
101
for (plugin *p = plugin_list; p != NULL; p = p->next){
102
if ((p->name == name)
103
or (p->name and name and (strcmp(p->name, name) == 0))){
111
/* Check for existing plugin with that name */
112
for(plugin *p = plugin_list; p != NULL; p = p->next){
113
if((p->name == name)
114
or (p->name and name and (strcmp(p->name, name) == 0))){
104
115
return p;
105
116
}
106
117
}
107
118
/* Create a new plugin */
108
plugin *new_plugin = malloc(sizeof(plugin));
109
if (new_plugin == NULL){
119
plugin *new_plugin = NULL;
120
do {
121
new_plugin = malloc(sizeof(plugin));
122
} while(new_plugin == NULL and errno == EINTR);
123
if(new_plugin == NULL){
110
124
return NULL;
111
125
}
112
126
char *copy_name = NULL;
113
127
if(name != NULL){
114
copy_name = strdup(name);
128
do {
129
copy_name = strdup(name);
130
} while(copy_name == NULL and errno == EINTR);
115
131
if(copy_name == NULL){
132
int e = errno;
133
free(new_plugin);
134
errno = e;
116
135
return NULL;
117
136
}
118
137
}
119
138
120
*new_plugin = (plugin) { .name = copy_name,
121
.argc = 1,
122
.disabled = false,
123
.next = plugin_list };
139
*new_plugin = (plugin){ .name = copy_name,
140
.argc = 1,
141
.disabled = false,
142
.next = plugin_list };
124
143
125
new_plugin->argv = malloc(sizeof(char *) * 2);
126
if (new_plugin->argv == NULL){
144
do {
145
new_plugin->argv = malloc(sizeof(char *) * 2);
146
} while(new_plugin->argv == NULL and errno == EINTR);
147
if(new_plugin->argv == NULL){
148
int e = errno;
127
149
free(copy_name);
128
150
free(new_plugin);
151
errno = e;
129
152
return NULL;
130
153
}
131
154
new_plugin->argv[0] = copy_name;
132
155
new_plugin->argv[1] = NULL;
133
156
134
new_plugin->environ = malloc(sizeof(char *));
157
do {
158
new_plugin->environ = malloc(sizeof(char *));
159
} while(new_plugin->environ == NULL and errno == EINTR);
135
160
if(new_plugin->environ == NULL){
161
int e = errno;
136
162
free(copy_name);
137
163
free(new_plugin->argv);
138
164
free(new_plugin);
165
errno = e;
139
166
return NULL;
140
167
}
141
168
new_plugin->environ[0] = NULL;
146
173
}
147
174
148
175
/* Helper function for add_argument and add_environment */
176
__attribute__((nonnull, warn_unused_result))
149
177
static bool add_to_char_array(const char *new, char ***array,
150
178
int *len){
151
179
/* Resize the pointed-to array to hold one more pointer */
152
*array = realloc(*array, sizeof(char *)
153
* (size_t) ((*len) + 2));
180
char **new_array = NULL;
181
do {
182
new_array = realloc(*array, sizeof(char *)
183
* (size_t) ((*len) + 2));
184
} while(new_array == NULL and errno == EINTR);
154
185
/* Malloc check */
155
if(*array == NULL){
186
if(new_array == NULL){
156
187
return false;
157
188
}
189
*array = new_array;
158
190
/* Make a copy of the new string */
159
char *copy = strdup(new);
191
char *copy;
192
do {
193
copy = strdup(new);
194
} while(copy == NULL and errno == EINTR);
160
195
if(copy == NULL){
161
196
return false;
162
197
}
169
204
}
170
205
171
206
/* Add to a plugin's argument vector */
207
__attribute__((nonnull(2), warn_unused_result))
172
208
static bool add_argument(plugin *p, const char *arg){
173
209
if(p == NULL){
174
210
return false;
177
213
}
178
214
179
215
/* Add to a plugin's environment */
216
__attribute__((nonnull(2), warn_unused_result))
180
217
static bool add_environment(plugin *p, const char *def, bool replace){
181
218
if(p == NULL){
182
219
return false;
184
221
/* namelen = length of name of environment variable */
185
222
size_t namelen = (size_t)(strchrnul(def, '=') - def);
186
223
/* Search for this environment variable */
187
for(char **e = p->environ; *e != NULL; e++){
188
if(strncmp(*e, def, namelen + 1) == 0){
224
for(char **envdef = p->environ; *envdef != NULL; envdef++){
225
if(strncmp(*envdef, def, namelen + 1) == 0){
189
226
/* It already exists */
190
227
if(replace){
191
char *new = realloc(*e, strlen(def) + 1);
192
if(new == NULL){
228
char *new_envdef;
229
do {
230
new_envdef = realloc(*envdef, strlen(def) + 1);
231
} while(new_envdef == NULL and errno == EINTR);
232
if(new_envdef == NULL){
193
233
return false;
194
234
}
195
*e = new;
196
strcpy(*e, def);
235
*envdef = new_envdef;
236
strcpy(*envdef, def);
197
237
}
198
238
return true;
199
239
}
201
241
return add_to_char_array(def, &(p->environ), &(p->envc));
202
242
}
203
243
244
#ifndef O_CLOEXEC
204
245
/*
205
246
* Based on the example in the GNU LibC manual chapter 13.13 "File
206
247
* Descriptor Flags".
207
* *Note File Descriptor Flags:(libc)Descriptor Flags.
248
| [[info:libc:Descriptor%20Flags][File Descriptor Flags]] |
208
249
*/
250
__attribute__((warn_unused_result))
209
251
static int set_cloexec_flag(int fd){
210
int ret = fcntl(fd, F_GETFD, 0);
252
int ret = (int)TEMP_FAILURE_RETRY(fcntl(fd, F_GETFD, 0));
211
253
/* If reading the flags failed, return error indication now. */
212
254
if(ret < 0){
213
255
return ret;
214
256
}
215
257
/* Store modified flag word in the descriptor. */
216
return fcntl(fd, F_SETFD, ret | FD_CLOEXEC);
258
return (int)TEMP_FAILURE_RETRY(fcntl(fd, F_SETFD,
259
ret | FD_CLOEXEC));
217
260
}
261
#endif /* not O_CLOEXEC */
218
262
219
263
220
264
/* Mark processes as completed when they exit, and save their exit
221
265
status. */
222
266
static void handle_sigchld(__attribute__((unused)) int sig){
267
int old_errno = errno;
223
268
while(true){
224
269
plugin *proc = plugin_list;
225
270
int status;
229
274
break;
230
275
}
231
276
if(pid == -1){
232
if (errno != ECHILD){
233
perror("waitpid");
277
if(errno == ECHILD){
278
/* No child processes */
279
break;
234
280
}
235
/* No child processes */
236
break;
281
error(0, errno, "waitpid");
237
282
}
238
283
239
284
/* A child exited, find it in process_list */
245
290
continue;
246
291
}
247
292
proc->status = status;
248
proc->completed = true;
293
proc->completed = 1;
249
294
}
295
errno = old_errno;
250
296
}
251
297
252
298
/* Prints out a password to stdout */
299
__attribute__((nonnull, warn_unused_result))
253
300
static bool print_out_password(const char *buffer, size_t length){
254
301
ssize_t ret;
255
302
for(size_t written = 0; written < length; written += (size_t)ret){
263
310
}
264
311
265
312
/* Removes and free a plugin from the plugin list */
313
__attribute__((nonnull))
266
314
static void free_plugin(plugin *plugin_node){
267
315
268
316
for(char **arg = plugin_node->argv; *arg != NULL; arg++){
274
322
}
275
323
free(plugin_node->environ);
276
324
free(plugin_node->buffer);
277
325
278
326
/* Removes the plugin from the singly-linked list */
279
327
if(plugin_node == plugin_list){
280
328
/* First one - simple */
300
348
301
349
int main(int argc, char *argv[]){
302
350
char *plugindir = NULL;
351
char *pluginhelperdir = NULL;
303
352
char *argfile = NULL;
304
353
FILE *conffp;
305
size_t d_name_len;
306
DIR *dir = NULL;
307
struct dirent *dirst;
354
struct dirent **direntries = NULL;
308
355
struct stat st;
309
356
fd_set rfds_all;
310
357
int ret, maxfd = 0;
358
ssize_t sret;
311
359
uid_t uid = 65534;
312
360
gid_t gid = 65534;
313
361
bool debug = false;
317
365
.sa_flags = SA_NOCLDSTOP };
318
366
char **custom_argv = NULL;
319
367
int custom_argc = 0;
368
int dir_fd = -1;
320
369
321
370
/* Establish a signal handler */
322
371
sigemptyset(&sigchld_action.sa_mask);
323
372
ret = sigaddset(&sigchld_action.sa_mask, SIGCHLD);
324
373
if(ret == -1){
325
perror("sigaddset");
326
exitstatus = EXIT_FAILURE;
374
error(0, errno, "sigaddset");
375
exitstatus = EX_OSERR;
327
376
goto fallback;
328
377
}
329
378
ret = sigaction(SIGCHLD, &sigchld_action, &old_sigchld_action);
330
379
if(ret == -1){
331
perror("sigaction");
332
exitstatus = EXIT_FAILURE;
380
error(0, errno, "sigaction");
381
exitstatus = EX_OSERR;
333
382
goto fallback;
334
383
}
335
384
367
416
.doc = "Group ID the plugins will run as", .group = 3 },
368
417
{ .name = "debug", .key = 132,
369
418
.doc = "Debug mode", .group = 4 },
419
{ .name = "plugin-helper-dir", .key = 133,
420
.arg = "DIRECTORY",
421
.doc = "Specify a different plugin helper directory",
422
.group = 2 },
423
/*
424
* These reproduce what we would get without ARGP_NO_HELP
425
*/
426
{ .name = "help", .key = '?',
427
.doc = "Give this help list", .group = -1 },
428
{ .name = "usage", .key = -3,
429
.doc = "Give a short usage message", .group = -1 },
430
{ .name = "version", .key = 'V',
431
.doc = "Print program version", .group = -1 },
370
432
{ .name = NULL }
371
433
};
372
434
373
error_t parse_opt (int key, char *arg, __attribute__((unused))
374
struct argp_state *state) {
375
switch (key) {
435
__attribute__((nonnull(3)))
436
error_t parse_opt(int key, char *arg, struct argp_state *state){
437
errno = 0;
438
switch(key){
439
char *tmp;
440
intmax_t tmp_id;
376
441
case 'g': /* --global-options */
377
if (arg != NULL){
378
char *p;
379
while((p = strsep(&arg, ",")) != NULL){
380
if(p[0] == '\0'){
381
continue;
382
}
383
if(not add_argument(getplugin(NULL), p)){
384
perror("add_argument");
385
return ARGP_ERR_UNKNOWN;
442
{
443
char *plugin_option;
444
while((plugin_option = strsep(&arg, ",")) != NULL){
445
if(not add_argument(getplugin(NULL), plugin_option)){
446
break;
386
447
}
387
448
}
449
errno = 0;
388
450
}
389
451
break;
390
452
case 'G': /* --global-env */
391
if(arg == NULL){
392
break;
393
}
394
if(not add_environment(getplugin(NULL), arg, true)){
395
perror("add_environment");
453
if(add_environment(getplugin(NULL), arg, true)){
454
errno = 0;
396
455
}
397
456
break;
398
457
case 'o': /* --options-for */
399
if (arg != NULL){
400
char *p_name = strsep(&arg, ":");
401
if(p_name[0] == '\0' or arg == NULL){
402
break;
403
}
404
char *opt = strsep(&arg, ":");
405
if(opt[0] == '\0' or opt == NULL){
406
break;
407
}
408
char *p;
409
while((p = strsep(&opt, ",")) != NULL){
410
if(p[0] == '\0'){
411
continue;
412
}
413
if(not add_argument(getplugin(p_name), p)){
414
perror("add_argument");
415
return ARGP_ERR_UNKNOWN;
416
}
417
}
458
{
459
char *option_list = strchr(arg, ':');
460
if(option_list == NULL){
461
argp_error(state, "No colon in \"%s\"", arg);
462
errno = EINVAL;
463
break;
464
}
465
*option_list = '\0';
466
option_list++;
467
if(arg[0] == '\0'){
468
argp_error(state, "Empty plugin name");
469
errno = EINVAL;
470
break;
471
}
472
char *option;
473
while((option = strsep(&option_list, ",")) != NULL){
474
if(not add_argument(getplugin(arg), option)){
475
break;
476
}
477
}
478
errno = 0;
418
479
}
419
480
break;
420
481
case 'E': /* --env-for */
421
if(arg == NULL){
422
break;
423
}
424
482
{
425
483
char *envdef = strchr(arg, ':');
426
484
if(envdef == NULL){
485
argp_error(state, "No colon in \"%s\"", arg);
486
errno = EINVAL;
427
487
break;
428
488
}
429
489
*envdef = '\0';
430
if(not add_environment(getplugin(arg), envdef+1, true)){
431
perror("add_environment");
490
envdef++;
491
if(arg[0] == '\0'){
492
argp_error(state, "Empty plugin name");
493
errno = EINVAL;
494
break;
495
}
496
if(add_environment(getplugin(arg), envdef, true)){
497
errno = 0;
432
498
}
433
499
}
434
500
break;
435
501
case 'd': /* --disable */
436
if (arg != NULL){
502
{
437
503
plugin *p = getplugin(arg);
438
if(p == NULL){
439
return ARGP_ERR_UNKNOWN;
504
if(p != NULL){
505
p->disabled = true;
506
errno = 0;
440
507
}
441
p->disabled = true;
442
508
}
443
509
break;
444
510
case 'e': /* --enable */
445
if (arg != NULL){
511
{
446
512
plugin *p = getplugin(arg);
447
if(p == NULL){
448
return ARGP_ERR_UNKNOWN;
513
if(p != NULL){
514
p->disabled = false;
515
errno = 0;
449
516
}
450
p->disabled = false;
451
517
}
452
518
break;
453
519
case 128: /* --plugin-dir */
454
520
free(plugindir);
455
521
plugindir = strdup(arg);
456
if(plugindir == NULL){
457
perror("strdup");
458
}
522
if(plugindir != NULL){
523
errno = 0;
524
}
459
525
break;
460
526
case 129: /* --config-file */
461
527
/* This is already done by parse_opt_config_file() */
462
528
break;
463
529
case 130: /* --userid */
464
uid = (uid_t)strtol(arg, NULL, 10);
530
tmp_id = strtoimax(arg, &tmp, 10);
531
if(errno != 0 or tmp == arg or *tmp != '\0'
532
or tmp_id != (uid_t)tmp_id){
533
argp_error(state, "Bad user ID number: \"%s\", using %"
534
PRIdMAX, arg, (intmax_t)uid);
535
break;
536
}
537
uid = (uid_t)tmp_id;
538
errno = 0;
465
539
break;
466
540
case 131: /* --groupid */
467
gid = (gid_t)strtol(arg, NULL, 10);
541
tmp_id = strtoimax(arg, &tmp, 10);
542
if(errno != 0 or tmp == arg or *tmp != '\0'
543
or tmp_id != (gid_t)tmp_id){
544
argp_error(state, "Bad group ID number: \"%s\", using %"
545
PRIdMAX, arg, (intmax_t)gid);
546
break;
547
}
548
gid = (gid_t)tmp_id;
549
errno = 0;
468
550
break;
469
551
case 132: /* --debug */
470
552
debug = true;
471
553
break;
554
case 133: /* --plugin-helper-dir */
555
free(pluginhelperdir);
556
pluginhelperdir = strdup(arg);
557
if(pluginhelperdir != NULL){
558
errno = 0;
559
}
560
break;
561
/*
562
* These reproduce what we would get without ARGP_NO_HELP
563
*/
564
case '?': /* --help */
565
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
566
argp_state_help(state, state->out_stream, ARGP_HELP_STD_HELP);
567
case -3: /* --usage */
568
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
569
argp_state_help(state, state->out_stream,
570
ARGP_HELP_USAGE | ARGP_HELP_EXIT_OK);
571
case 'V': /* --version */
572
fprintf(state->out_stream, "%s\n", argp_program_version);
573
exit(EXIT_SUCCESS);
574
break;
575
/*
576
* When adding more options before this line, remember to also add a
577
* "case" to the "parse_opt_config_file" function below.
578
*/
472
579
case ARGP_KEY_ARG:
473
580
/* Cryptsetup always passes an argument, which is an empty
474
581
string if "none" was specified in /etc/crypttab. So if
475
582
argument was empty, we ignore it silently. */
476
if(arg[0] != '\0'){
477
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
583
if(arg[0] == '\0'){
584
break;
478
585
}
479
break;
480
case ARGP_KEY_END:
481
break;
482
586
default:
483
587
return ARGP_ERR_UNKNOWN;
484
588
}
485
return 0;
589
return errno; /* Set to 0 at start */
486
590
}
487
591
488
592
/* This option parser is the same as parse_opt() above, except it
489
593
ignores everything but the --config-file option. */
490
error_t parse_opt_config_file (int key, char *arg,
491
__attribute__((unused))
492
struct argp_state *state) {
493
switch (key) {
594
error_t parse_opt_config_file(int key, char *arg,
595
__attribute__((unused))
596
struct argp_state *state){
597
errno = 0;
598
switch(key){
494
599
case 'g': /* --global-options */
495
600
case 'G': /* --global-env */
496
601
case 'o': /* --options-for */
502
607
case 129: /* --config-file */
503
608
free(argfile);
504
609
argfile = strdup(arg);
505
if(argfile == NULL){
506
perror("strdup");
610
if(argfile != NULL){
611
errno = 0;
507
612
}
508
break;
613
break;
509
614
case 130: /* --userid */
510
615
case 131: /* --groupid */
511
616
case 132: /* --debug */
617
case 133: /* --plugin-helper-dir */
618
case '?': /* --help */
619
case -3: /* --usage */
620
case 'V': /* --version */
512
621
case ARGP_KEY_ARG:
513
case ARGP_KEY_END:
514
622
break;
515
623
default:
516
624
return ARGP_ERR_UNKNOWN;
517
625
}
518
return 0;
626
return errno;
519
627
}
520
628
521
629
struct argp argp = { .options = options,
523
631
.args_doc = "",
524
632
.doc = "Mandos plugin runner -- Run plugins" };
525
633
526
/* Parse using the parse_opt_config_file in order to get the custom
634
/* Parse using parse_opt_config_file() in order to get the custom
527
635
config file location, if any. */
528
ret = argp_parse (&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
529
if (ret == ARGP_ERR_UNKNOWN){
530
fprintf(stderr, "Unknown error while parsing arguments\n");
531
exitstatus = EXIT_FAILURE;
636
ret = argp_parse(&argp, argc, argv,
637
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
638
NULL, NULL);
639
switch(ret){
640
case 0:
641
break;
642
case ENOMEM:
643
default:
644
errno = ret;
645
error(0, errno, "argp_parse");
646
exitstatus = EX_OSERR;
647
goto fallback;
648
case EINVAL:
649
exitstatus = EX_USAGE;
532
650
goto fallback;
533
651
}
534
652
536
654
argp.parser = parse_opt;
537
655
538
656
/* Open the configfile if available */
539
if (argfile == NULL){
657
if(argfile == NULL){
540
658
conffp = fopen(AFILE, "r");
541
659
} else {
542
660
conffp = fopen(argfile, "r");
543
}
661
}
544
662
if(conffp != NULL){
545
663
char *org_line = NULL;
546
664
char *p, *arg, *new_arg, *line;
547
665
size_t size = 0;
548
ssize_t sret;
549
666
const char whitespace_delims[] = " \r\t\f\v\n";
550
667
const char comment_delim[] = "#";
551
668
552
669
custom_argc = 1;
553
670
custom_argv = malloc(sizeof(char*) * 2);
554
671
if(custom_argv == NULL){
555
perror("malloc");
556
exitstatus = EXIT_FAILURE;
672
error(0, errno, "malloc");
673
exitstatus = EX_OSERR;
557
674
goto fallback;
558
675
}
559
676
custom_argv[0] = argv[0];
560
677
custom_argv[1] = NULL;
561
678
562
679
/* for each line in the config file, strip whitespace and ignore
563
680
commented text */
564
681
while(true){
566
683
if(sret == -1){
567
684
break;
568
685
}
569
686
570
687
line = org_line;
571
688
arg = strsep(&line, comment_delim);
572
689
while((p = strsep(&arg, whitespace_delims)) != NULL){
575
692
}
576
693
new_arg = strdup(p);
577
694
if(new_arg == NULL){
578
perror("strdup");
579
exitstatus = EXIT_FAILURE;
695
error(0, errno, "strdup");
696
exitstatus = EX_OSERR;
580
697
free(org_line);
581
698
goto fallback;
582
699
}
583
700
584
701
custom_argc += 1;
585
custom_argv = realloc(custom_argv, sizeof(char *)
586
* ((unsigned int) custom_argc + 1));
587
if(custom_argv == NULL){
588
perror("realloc");
589
exitstatus = EXIT_FAILURE;
590
free(org_line);
591
goto fallback;
702
{
703
char **new_argv = realloc(custom_argv, sizeof(char *)
704
* ((unsigned int)
705
custom_argc + 1));
706
if(new_argv == NULL){
707
error(0, errno, "realloc");
708
exitstatus = EX_OSERR;
709
free(new_arg);
710
free(org_line);
711
goto fallback;
712
} else {
713
custom_argv = new_argv;
714
}
592
715
}
593
716
custom_argv[custom_argc-1] = new_arg;
594
custom_argv[custom_argc] = NULL;
717
custom_argv[custom_argc] = NULL;
595
718
}
596
719
}
720
do {
721
ret = fclose(conffp);
722
} while(ret == EOF and errno == EINTR);
723
if(ret == EOF){
724
error(0, errno, "fclose");
725
exitstatus = EX_IOERR;
726
goto fallback;
727
}
597
728
free(org_line);
598
729
} else {
599
730
/* Check for harmful errors and go to fallback. Other errors might
600
731
not affect opening plugins */
601
if (errno == EMFILE or errno == ENFILE or errno == ENOMEM){
602
perror("fopen");
603
exitstatus = EXIT_FAILURE;
732
if(errno == EMFILE or errno == ENFILE or errno == ENOMEM){
733
error(0, errno, "fopen");
734
exitstatus = EX_OSERR;
604
735
goto fallback;
605
736
}
606
737
}
607
/* If there was any arguments from configuration file,
608
pass them to parser as command arguments */
738
/* If there were any arguments from the configuration file, pass
739
them to parser as command line arguments */
609
740
if(custom_argv != NULL){
610
ret = argp_parse (&argp, custom_argc, custom_argv, ARGP_IN_ORDER,
611
0, NULL);
612
if (ret == ARGP_ERR_UNKNOWN){
613
fprintf(stderr, "Unknown error while parsing arguments\n");
614
exitstatus = EXIT_FAILURE;
741
ret = argp_parse(&argp, custom_argc, custom_argv,
742
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
743
NULL, NULL);
744
switch(ret){
745
case 0:
746
break;
747
case ENOMEM:
748
default:
749
errno = ret;
750
error(0, errno, "argp_parse");
751
exitstatus = EX_OSERR;
752
goto fallback;
753
case EINVAL:
754
exitstatus = EX_CONFIG;
615
755
goto fallback;
616
756
}
617
757
}
618
758
619
759
/* Parse actual command line arguments, to let them override the
620
760
config file */
621
ret = argp_parse (&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
622
if (ret == ARGP_ERR_UNKNOWN){
623
fprintf(stderr, "Unknown error while parsing arguments\n");
624
exitstatus = EXIT_FAILURE;
625
goto fallback;
761
ret = argp_parse(&argp, argc, argv,
762
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
763
NULL, NULL);
764
switch(ret){
765
case 0:
766
break;
767
case ENOMEM:
768
default:
769
errno = ret;
770
error(0, errno, "argp_parse");
771
exitstatus = EX_OSERR;
772
goto fallback;
773
case EINVAL:
774
exitstatus = EX_USAGE;
775
goto fallback;
776
}
777
778
{
779
char *pluginhelperenv;
780
bool bret = true;
781
ret = asprintf(&pluginhelperenv, "MANDOSPLUGINHELPERDIR=%s",
782
pluginhelperdir != NULL ? pluginhelperdir : PHDIR);
783
if(ret != -1){
784
bret = add_environment(getplugin(NULL), pluginhelperenv, true);
785
}
786
if(ret == -1 or not bret){
787
error(0, errno, "Failed to set MANDOSPLUGINHELPERDIR"
788
" environment variable to \"%s\" for all plugins\n",
789
pluginhelperdir != NULL ? pluginhelperdir : PHDIR);
790
}
791
if(ret != -1){
792
free(pluginhelperenv);
793
}
626
794
}
627
795
628
796
if(debug){
632
800
for(char **a = p->argv; *a != NULL; a++){
633
801
fprintf(stderr, "\tArg: %s\n", *a);
634
802
}
635
fprintf(stderr, "...and %u environment variables\n", p->envc);
803
fprintf(stderr, "...and %d environment variables\n", p->envc);
636
804
for(char **a = p->environ; *a != NULL; a++){
637
805
fprintf(stderr, "\t%s\n", *a);
638
806
}
639
807
}
640
808
}
641
809
642
/* Strip permissions down to nobody */
810
if(getuid() == 0){
811
/* Work around Debian bug #633582:
812
<http://bugs.debian.org/633582> */
813
int plugindir_fd = open(/* plugindir or */ PDIR, O_RDONLY);
814
if(plugindir_fd == -1){
815
if(errno != ENOENT){
816
error(0, errno, "open(\"" PDIR "\")");
817
}
818
} else {
819
ret = (int)TEMP_FAILURE_RETRY(fstat(plugindir_fd, &st));
820
if(ret == -1){
821
error(0, errno, "fstat");
822
} else {
823
if(S_ISDIR(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
824
ret = fchown(plugindir_fd, uid, gid);
825
if(ret == -1){
826
error(0, errno, "fchown");
827
}
828
}
829
}
830
close(plugindir_fd);
831
}
832
}
833
834
/* Lower permissions */
835
ret = setgid(gid);
836
if(ret == -1){
837
error(0, errno, "setgid");
838
}
643
839
ret = setuid(uid);
644
if (ret == -1){
645
perror("setuid");
646
}
647
setgid(gid);
648
if (ret == -1){
649
perror("setgid");
650
}
651
652
if (plugindir == NULL){
653
dir = opendir(PDIR);
654
} else {
655
dir = opendir(plugindir);
656
}
657
658
if(dir == NULL){
659
perror("Could not open plugin dir");
660
exitstatus = EXIT_FAILURE;
661
goto fallback;
662
}
663
664
/* Set the FD_CLOEXEC flag on the directory, if possible */
840
if(ret == -1){
841
error(0, errno, "setuid");
842
}
843
844
/* Open plugin directory with close_on_exec flag */
665
845
{
666
int dir_fd = dirfd(dir);
667
if(dir_fd >= 0){
668
ret = set_cloexec_flag(dir_fd);
669
if(ret < 0){
670
perror("set_cloexec_flag");
671
exitstatus = EXIT_FAILURE;
672
goto fallback;
846
dir_fd = open(plugindir != NULL ? plugindir : PDIR, O_RDONLY |
847
#ifdef O_CLOEXEC
848
O_CLOEXEC
849
#else /* not O_CLOEXEC */
850
0
851
#endif /* not O_CLOEXEC */
852
);
853
if(dir_fd == -1){
854
error(0, errno, "Could not open plugin dir");
855
exitstatus = EX_UNAVAILABLE;
856
goto fallback;
857
}
858
859
#ifndef O_CLOEXEC
860
/* Set the FD_CLOEXEC flag on the directory */
861
ret = set_cloexec_flag(dir_fd);
862
if(ret < 0){
863
error(0, errno, "set_cloexec_flag");
864
exitstatus = EX_OSERR;
865
goto fallback;
866
}
867
#endif /* O_CLOEXEC */
868
}
869
870
int good_name(const struct dirent * const dirent){
871
const char * const patterns[] = { ".*", "#*#", "*~", "*.dpkg-new",
872
"*.dpkg-old", "*.dpkg-bak",
873
"*.dpkg-divert", NULL };
874
#ifdef __GNUC__
875
#pragma GCC diagnostic push
876
#pragma GCC diagnostic ignored "-Wcast-qual"
877
#endif
878
for(const char **pat = (const char **)patterns;
879
*pat != NULL; pat++){
880
#ifdef __GNUC__
881
#pragma GCC diagnostic pop
882
#endif
883
if(fnmatch(*pat, dirent->d_name, FNM_FILE_NAME | FNM_PERIOD)
884
!= FNM_NOMATCH){
885
if(debug){
886
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
887
" matching pattern %s\n", dirent->d_name, *pat);
888
}
889
return 0;
673
890
}
674
891
}
892
return 1;
893
}
894
895
#ifdef __GLIBC__
896
#if __GLIBC_PREREQ(2, 15)
897
int numplugins = scandirat(dir_fd, ".", &direntries, good_name,
898
alphasort);
899
#else /* not __GLIBC_PREREQ(2, 15) */
900
int numplugins = scandir(plugindir != NULL ? plugindir : PDIR,
901
&direntries, good_name, alphasort);
902
#endif /* not __GLIBC_PREREQ(2, 15) */
903
#else /* not __GLIBC__ */
904
int numplugins = scandir(plugindir != NULL ? plugindir : PDIR,
905
&direntries, good_name, alphasort);
906
#endif /* not __GLIBC__ */
907
if(numplugins == -1){
908
error(0, errno, "Could not scan plugin dir");
909
direntries = NULL;
910
exitstatus = EX_OSERR;
911
goto fallback;
675
912
}
676
913
677
914
FD_ZERO(&rfds_all);
678
915
679
916
/* Read and execute any executable in the plugin directory*/
680
while(true){
681
dirst = readdir(dir);
682
683
/* All directory entries have been processed */
684
if(dirst == NULL){
685
if (errno == EBADF){
686
perror("readdir");
687
exitstatus = EXIT_FAILURE;
688
goto fallback;
689
}
690
break;
691
}
692
693
d_name_len = strlen(dirst->d_name);
694
695
/* Ignore dotfiles, backup files and other junk */
696
{
697
bool bad_name = false;
698
699
const char const *bad_prefixes[] = { ".", "#", NULL };
700
701
const char const *bad_suffixes[] = { "~", "#", ".dpkg-new",
702
".dpkg-old",
703
".dpkg-divert", NULL };
704
for(const char **pre = bad_prefixes; *pre != NULL; pre++){
705
size_t pre_len = strlen(*pre);
706
if((d_name_len >= pre_len)
707
and strncmp((dirst->d_name), *pre, pre_len) == 0){
708
if(debug){
709
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
710
" with bad prefix %s\n", dirst->d_name, *pre);
711
}
712
bad_name = true;
713
break;
714
}
715
}
716
if(bad_name){
717
continue;
718
}
719
for(const char **suf = bad_suffixes; *suf != NULL; suf++){
720
size_t suf_len = strlen(*suf);
721
if((d_name_len >= suf_len)
722
and (strcmp((dirst->d_name)+d_name_len-suf_len, *suf)
723
== 0)){
724
if(debug){
725
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
726
" with bad suffix %s\n", dirst->d_name, *suf);
727
}
728
bad_name = true;
729
break;
730
}
731
}
732
733
if(bad_name){
734
continue;
735
}
736
}
737
738
char *filename;
739
if(plugindir == NULL){
740
ret = asprintf(&filename, PDIR "/%s", dirst->d_name);
741
} else {
742
ret = asprintf(&filename, "%s/%s", plugindir, dirst->d_name);
743
}
744
if(ret < 0){
745
perror("asprintf");
746
continue;
747
}
748
749
ret = stat(filename, &st);
750
if (ret == -1){
751
perror("stat");
752
free(filename);
753
continue;
754
}
755
917
for(int i = 0; i < numplugins; i++){
918
919
int plugin_fd = openat(dir_fd, direntries[i]->d_name, O_RDONLY);
920
if(plugin_fd == -1){
921
error(0, errno, "Could not open plugin");
922
free(direntries[i]);
923
continue;
924
}
925
ret = (int)TEMP_FAILURE_RETRY(fstat(plugin_fd, &st));
926
if(ret == -1){
927
error(0, errno, "stat");
928
close(plugin_fd);
929
free(direntries[i]);
930
continue;
931
}
932
756
933
/* Ignore non-executable files */
757
if (not S_ISREG(st.st_mode) or (access(filename, X_OK) != 0)){
934
if(not S_ISREG(st.st_mode)
935
or (TEMP_FAILURE_RETRY(faccessat(dir_fd, direntries[i]->d_name,
936
X_OK, 0)) != 0)){
758
937
if(debug){
759
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
760
" with bad type or mode\n", filename);
938
fprintf(stderr, "Ignoring plugin dir entry \"%s/%s\""
939
" with bad type or mode\n",
940
plugindir != NULL ? plugindir : PDIR,
941
direntries[i]->d_name);
761
942
}
762
free(filename);
943
close(plugin_fd);
944
free(direntries[i]);
763
945
continue;
764
946
}
765
947
766
plugin *p = getplugin(dirst->d_name);
948
plugin *p = getplugin(direntries[i]->d_name);
767
949
if(p == NULL){
768
perror("getplugin");
769
free(filename);
950
error(0, errno, "getplugin");
951
close(plugin_fd);
952
free(direntries[i]);
770
953
continue;
771
954
}
772
955
if(p->disabled){
773
956
if(debug){
774
957
fprintf(stderr, "Ignoring disabled plugin \"%s\"\n",
775
dirst->d_name);
958
direntries[i]->d_name);
776
959
}
777
free(filename);
960
close(plugin_fd);
961
free(direntries[i]);
778
962
continue;
779
963
}
780
964
{
783
967
if(g != NULL){
784
968
for(char **a = g->argv + 1; *a != NULL; a++){
785
969
if(not add_argument(p, *a)){
786
perror("add_argument");
970
error(0, errno, "add_argument");
787
971
}
788
972
}
789
973
/* Add global environment variables */
790
974
for(char **e = g->environ; *e != NULL; e++){
791
975
if(not add_environment(p, *e, false)){
792
perror("add_environment");
976
error(0, errno, "add_environment");
793
977
}
794
978
}
795
979
}
796
980
}
797
/* If this plugin has any environment variables, we will call
798
using execve and need to duplicate the environment from this
799
process, too. */
981
/* If this plugin has any environment variables, we need to
982
duplicate the environment from this process, too. */
800
983
if(p->environ[0] != NULL){
801
984
for(char **e = environ; *e != NULL; e++){
802
985
if(not add_environment(p, *e, false)){
803
perror("add_environment");
986
error(0, errno, "add_environment");
804
987
}
805
988
}
806
989
}
807
990
808
991
int pipefd[2];
809
ret = pipe(pipefd);
810
if (ret == -1){
811
perror("pipe");
812
exitstatus = EXIT_FAILURE;
813
goto fallback;
814
}
992
#ifndef O_CLOEXEC
993
ret = (int)TEMP_FAILURE_RETRY(pipe(pipefd));
994
#else /* O_CLOEXEC */
995
ret = (int)TEMP_FAILURE_RETRY(pipe2(pipefd, O_CLOEXEC));
996
#endif /* O_CLOEXEC */
997
if(ret == -1){
998
error(0, errno, "pipe");
999
exitstatus = EX_OSERR;
1000
free(direntries[i]);
1001
goto fallback;
1002
}
1003
if(pipefd[0] >= FD_SETSIZE){
1004
fprintf(stderr, "pipe()[0] (%d) >= FD_SETSIZE (%d)", pipefd[0],
1005
FD_SETSIZE);
1006
close(pipefd[0]);
1007
close(pipefd[1]);
1008
exitstatus = EX_OSERR;
1009
free(direntries[i]);
1010
goto fallback;
1011
}
1012
#ifndef O_CLOEXEC
815
1013
/* Ask OS to automatic close the pipe on exec */
816
1014
ret = set_cloexec_flag(pipefd[0]);
817
1015
if(ret < 0){
818
perror("set_cloexec_flag");
819
exitstatus = EXIT_FAILURE;
1016
error(0, errno, "set_cloexec_flag");
1017
close(pipefd[0]);
1018
close(pipefd[1]);
1019
exitstatus = EX_OSERR;
1020
free(direntries[i]);
820
1021
goto fallback;
821
1022
}
822
1023
ret = set_cloexec_flag(pipefd[1]);
823
1024
if(ret < 0){
824
perror("set_cloexec_flag");
825
exitstatus = EXIT_FAILURE;
1025
error(0, errno, "set_cloexec_flag");
1026
close(pipefd[0]);
1027
close(pipefd[1]);
1028
exitstatus = EX_OSERR;
1029
free(direntries[i]);
826
1030
goto fallback;
827
1031
}
1032
#endif /* not O_CLOEXEC */
828
1033
/* Block SIGCHLD until process is safely in process list */
829
ret = sigprocmask (SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1034
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_BLOCK,
1035
&sigchld_action.sa_mask,
1036
NULL));
830
1037
if(ret < 0){
831
perror("sigprocmask");
832
exitstatus = EXIT_FAILURE;
1038
error(0, errno, "sigprocmask");
1039
exitstatus = EX_OSERR;
1040
free(direntries[i]);
833
1041
goto fallback;
834
1042
}
835
1043
/* Starting a new process to be watched */
836
pid_t pid = fork();
1044
pid_t pid;
1045
do {
1046
pid = fork();
1047
} while(pid == -1 and errno == EINTR);
837
1048
if(pid == -1){
838
perror("fork");
839
exitstatus = EXIT_FAILURE;
1049
error(0, errno, "fork");
1050
TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1051
&sigchld_action.sa_mask, NULL));
1052
close(pipefd[0]);
1053
close(pipefd[1]);
1054
exitstatus = EX_OSERR;
1055
free(direntries[i]);
840
1056
goto fallback;
841
1057
}
842
1058
if(pid == 0){
843
1059
/* this is the child process */
844
1060
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
845
1061
if(ret < 0){
846
perror("sigaction");
847
_exit(EXIT_FAILURE);
1062
error(0, errno, "sigaction");
1063
_exit(EX_OSERR);
848
1064
}
849
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1065
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
850
1066
if(ret < 0){
851
perror("sigprocmask");
852
_exit(EXIT_FAILURE);
1067
error(0, errno, "sigprocmask");
1068
_exit(EX_OSERR);
853
1069
}
854
1070
855
1071
ret = dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
856
1072
if(ret == -1){
857
perror("dup2");
858
_exit(EXIT_FAILURE);
1073
error(0, errno, "dup2");
1074
_exit(EX_OSERR);
859
1075
}
860
1076
861
if(dirfd(dir) < 0){
862
/* If dir has no file descriptor, we could not set FD_CLOEXEC
863
above and must now close it manually here. */
864
closedir(dir);
865
}
866
if(p->environ[0] == NULL){
867
if(execv(filename, p->argv) < 0){
868
perror("execv");
869
_exit(EXIT_FAILURE);
870
}
871
} else {
872
if(execve(filename, p->argv, p->environ) < 0){
873
perror("execve");
874
_exit(EXIT_FAILURE);
875
}
1077
if(fexecve(plugin_fd, p->argv,
1078
(p->environ[0] != NULL) ? p->environ : environ) < 0){
1079
error(0, errno, "fexecve for %s/%s",
1080
plugindir != NULL ? plugindir : PDIR,
1081
direntries[i]->d_name);
1082
_exit(EX_OSERR);
876
1083
}
877
1084
/* no return */
878
1085
}
879
1086
/* Parent process */
880
1087
close(pipefd[1]); /* Close unused write end of pipe */
881
free(filename);
882
plugin *new_plugin = getplugin(dirst->d_name);
883
if (new_plugin == NULL){
884
perror("getplugin");
885
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1088
close(plugin_fd);
1089
plugin *new_plugin = getplugin(direntries[i]->d_name);
1090
if(new_plugin == NULL){
1091
error(0, errno, "getplugin");
1092
ret = (int)(TEMP_FAILURE_RETRY
1093
(sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
1094
NULL)));
886
1095
if(ret < 0){
887
perror("sigprocmask");
1096
error(0, errno, "sigprocmask");
888
1097
}
889
exitstatus = EXIT_FAILURE;
1098
exitstatus = EX_OSERR;
1099
free(direntries[i]);
890
1100
goto fallback;
891
1101
}
1102
free(direntries[i]);
892
1103
893
1104
new_plugin->pid = pid;
894
1105
new_plugin->fd = pipefd[0];
895
1106
896
1107
/* Unblock SIGCHLD so signal handler can be run if this process
897
1108
has already completed */
898
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1109
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1110
&sigchld_action.sa_mask,
1111
NULL));
899
1112
if(ret < 0){
900
perror("sigprocmask");
901
exitstatus = EXIT_FAILURE;
1113
error(0, errno, "sigprocmask");
1114
exitstatus = EX_OSERR;
902
1115
goto fallback;
903
1116
}
904
1117
905
FD_SET(new_plugin->fd, &rfds_all);
1118
#if defined (__GNUC__) and defined (__GLIBC__)
1119
#if not __GLIBC_PREREQ(2, 16)
1120
#pragma GCC diagnostic push
1121
#pragma GCC diagnostic ignored "-Wsign-conversion"
1122
#endif
1123
#endif
1124
FD_SET(new_plugin->fd, &rfds_all); /* Spurious warning from
1125
-Wconversion in GNU libc
1126
before 2.16 */
1127
#if defined (__GNUC__) and defined (__GLIBC__)
1128
#if not __GLIBC_PREREQ(2, 16)
1129
#pragma GCC diagnostic pop
1130
#endif
1131
#endif
906
1132
907
if (maxfd < new_plugin->fd){
1133
if(maxfd < new_plugin->fd){
908
1134
maxfd = new_plugin->fd;
909
1135
}
910
911
1136
}
912
1137
913
closedir(dir);
914
dir = NULL;
915
1138
free(direntries);
1139
direntries = NULL;
1140
close(dir_fd);
1141
dir_fd = -1;
1142
free_plugin(getplugin(NULL));
1143
916
1144
for(plugin *p = plugin_list; p != NULL; p = p->next){
917
1145
if(p->pid != 0){
918
1146
break;
923
1151
free_plugin_list();
924
1152
}
925
1153
}
926
1154
927
1155
/* Main loop while running plugins exist */
928
1156
while(plugin_list){
929
1157
fd_set rfds = rfds_all;
930
1158
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
931
if (select_ret == -1){
932
perror("select");
933
exitstatus = EXIT_FAILURE;
1159
if(select_ret == -1 and errno != EINTR){
1160
error(0, errno, "select");
1161
exitstatus = EX_OSERR;
934
1162
goto fallback;
935
1163
}
936
1164
/* OK, now either a process completed, or something can be read
937
1165
from one of them */
938
1166
for(plugin *proc = plugin_list; proc != NULL;){
939
1167
/* Is this process completely done? */
940
if(proc->eof and proc->completed){
1168
if(proc->completed and proc->eof){
941
1169
/* Only accept the plugin output if it exited cleanly */
942
1170
if(not WIFEXITED(proc->status)
943
1171
or WEXITSTATUS(proc->status) != 0){
944
1172
/* Bad exit by plugin */
945
1173
946
1174
if(debug){
947
1175
if(WIFEXITED(proc->status)){
948
fprintf(stderr, "Plugin %u exited with status %d\n",
949
(unsigned int) (proc->pid),
1176
fprintf(stderr, "Plugin %s [%" PRIdMAX "] exited with"
1177
" status %d\n", proc->name,
1178
(intmax_t) (proc->pid),
950
1179
WEXITSTATUS(proc->status));
951
} else if(WIFSIGNALED(proc->status)) {
952
fprintf(stderr, "Plugin %u killed by signal %d\n",
953
(unsigned int) (proc->pid),
954
WTERMSIG(proc->status));
1180
} else if(WIFSIGNALED(proc->status)){
1181
fprintf(stderr, "Plugin %s [%" PRIdMAX "] killed by"
1182
" signal %d: %s\n", proc->name,
1183
(intmax_t) (proc->pid),
1184
WTERMSIG(proc->status),
1185
strsignal(WTERMSIG(proc->status)));
955
1186
} else if(WCOREDUMP(proc->status)){
956
fprintf(stderr, "Plugin %d dumped core\n",
957
(unsigned int) (proc->pid));
1187
fprintf(stderr, "Plugin %s [%" PRIdMAX "] dumped"
1188
" core\n", proc->name, (intmax_t) (proc->pid));
958
1189
}
959
1190
}
960
1191
961
1192
/* Remove the plugin */
962
FD_CLR(proc->fd, &rfds_all);
963
1193
#if defined (__GNUC__) and defined (__GLIBC__)
1194
#if not __GLIBC_PREREQ(2, 16)
1195
#pragma GCC diagnostic push
1196
#pragma GCC diagnostic ignored "-Wsign-conversion"
1197
#endif
1198
#endif
1199
FD_CLR(proc->fd, &rfds_all); /* Spurious warning from
1200
-Wconversion in GNU libc
1201
before 2.16 */
1202
#if defined (__GNUC__) and defined (__GLIBC__)
1203
#if not __GLIBC_PREREQ(2, 16)
1204
#pragma GCC diagnostic pop
1205
#endif
1206
#endif
1207
964
1208
/* Block signal while modifying process_list */
965
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
966
if(ret < 0){
967
perror("sigprocmask");
968
exitstatus = EXIT_FAILURE;
969
goto fallback;
970
}
971
972
/* We are done modifying process list, so unblock signal */
973
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask,
974
NULL);
975
if(ret < 0){
976
perror("sigprocmask");
977
exitstatus = EXIT_FAILURE;
978
goto fallback;
979
}
980
981
if(plugin_list == NULL){
982
break;
1209
ret = (int)TEMP_FAILURE_RETRY(sigprocmask
1210
(SIG_BLOCK,
1211
&sigchld_action.sa_mask,
1212
NULL));
1213
if(ret < 0){
1214
error(0, errno, "sigprocmask");
1215
exitstatus = EX_OSERR;
1216
goto fallback;
983
1217
}
984
1218
985
1219
plugin *next_plugin = proc->next;
986
1220
free_plugin(proc);
987
1221
proc = next_plugin;
1222
1223
/* We are done modifying process list, so unblock signal */
1224
ret = (int)(TEMP_FAILURE_RETRY
1225
(sigprocmask(SIG_UNBLOCK,
1226
&sigchld_action.sa_mask, NULL)));
1227
if(ret < 0){
1228
error(0, errno, "sigprocmask");
1229
exitstatus = EX_OSERR;
1230
goto fallback;
1231
}
1232
1233
if(plugin_list == NULL){
1234
break;
1235
}
1236
988
1237
continue;
989
1238
}
990
1239
991
1240
/* This process exited nicely, so print its buffer */
992
1241
993
1242
bool bret = print_out_password(proc->buffer,
994
1243
proc->buffer_length);
995
1244
if(not bret){
996
perror("print_out_password");
997
exitstatus = EXIT_FAILURE;
1245
error(0, errno, "print_out_password");
1246
exitstatus = EX_IOERR;
998
1247
}
999
1248
goto fallback;
1000
1249
}
1001
1250
1002
1251
/* This process has not completed. Does it have any output? */
1003
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){
1252
#if defined (__GNUC__) and defined (__GLIBC__)
1253
#if not __GLIBC_PREREQ(2, 16)
1254
#pragma GCC diagnostic push
1255
#pragma GCC diagnostic ignored "-Wsign-conversion"
1256
#endif
1257
#endif
1258
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){ /* Spurious
1259
warning from
1260
-Wconversion
1261
in GNU libc
1262
before
1263
2.16 */
1264
#if defined (__GNUC__) and defined (__GLIBC__)
1265
#if not __GLIBC_PREREQ(2, 16)
1266
#pragma GCC diagnostic pop
1267
#endif
1268
#endif
1004
1269
/* This process had nothing to say at this time */
1005
1270
proc = proc->next;
1006
1271
continue;
1007
1272
}
1008
1273
/* Before reading, make the process' data buffer large enough */
1009
1274
if(proc->buffer_length + BUFFER_SIZE > proc->buffer_size){
1010
proc->buffer = realloc(proc->buffer, proc->buffer_size
1011
+ (size_t) BUFFER_SIZE);
1012
if (proc->buffer == NULL){
1013
perror("malloc");
1014
exitstatus = EXIT_FAILURE;
1275
char *new_buffer = realloc(proc->buffer, proc->buffer_size
1276
+ (size_t) BUFFER_SIZE);
1277
if(new_buffer == NULL){
1278
error(0, errno, "malloc");
1279
exitstatus = EX_OSERR;
1015
1280
goto fallback;
1016
1281
}
1282
proc->buffer = new_buffer;
1017
1283
proc->buffer_size += BUFFER_SIZE;
1018
1284
}
1019
1285
/* Read from the process */
1020
ret = read(proc->fd, proc->buffer + proc->buffer_length,
1021
BUFFER_SIZE);
1022
if(ret < 0){
1286
sret = TEMP_FAILURE_RETRY(read(proc->fd,
1287
proc->buffer
1288
+ proc->buffer_length,
1289
BUFFER_SIZE));
1290
if(sret < 0){
1023
1291
/* Read error from this process; ignore the error */
1024
1292
proc = proc->next;
1025
1293
continue;
1026
1294
}
1027
if(ret == 0){
1295
if(sret == 0){
1028
1296
/* got EOF */
1029
1297
proc->eof = true;
1030
1298
} else {
1031
proc->buffer_length += (size_t) ret;
1299
proc->buffer_length += (size_t) sret;
1032
1300
}
1033
1301
}
1034
1302
}
1035
1036
1303
1304
1037
1305
fallback:
1038
1306
1039
if(plugin_list == NULL or exitstatus != EXIT_SUCCESS){
1307
if(plugin_list == NULL or (exitstatus != EXIT_SUCCESS
1308
and exitstatus != EX_OK)){
1040
1309
/* Fallback if all plugins failed, none are found or an error
1041
1310
occured */
1042
1311
bool bret;
1050
1319
}
1051
1320
bret = print_out_password(passwordbuffer, len);
1052
1321
if(not bret){
1053
perror("print_out_password");
1054
exitstatus = EXIT_FAILURE;
1322
error(0, errno, "print_out_password");
1323
exitstatus = EX_IOERR;
1055
1324
}
1056
1325
}
1057
1326
1058
1327
/* Restore old signal handler */
1059
1328
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1060
1329
if(ret == -1){
1061
perror("sigaction");
1062
exitstatus = EXIT_FAILURE;
1330
error(0, errno, "sigaction");
1331
exitstatus = EX_OSERR;
1063
1332
}
1064
1333
1065
1334
if(custom_argv != NULL){
1066
1335
for(char **arg = custom_argv+1; *arg != NULL; arg++){
1067
1336
free(*arg);
1069
1338
free(custom_argv);
1070
1339
}
1071
1340
1072
if(dir != NULL){
1073
closedir(dir);
1341
free(direntries);
1342
1343
if(dir_fd != -1){
1344
close(dir_fd);
1074
1345
}
1075
1346
1076
/* Free the process list and kill the processes */
1347
/* Kill the processes */
1077
1348
for(plugin *p = plugin_list; p != NULL; p = p->next){
1078
1349
if(p->pid != 0){
1079
1350
close(p->fd);
1080
1351
ret = kill(p->pid, SIGTERM);
1081
1352
if(ret == -1 and errno != ESRCH){
1082
1353
/* Set-uid proccesses might not get closed */
1083
perror("kill");
1354
error(0, errno, "kill");
1084
1355
}
1085
1356
}
1086
1357
}
1087
1358
1088
1359
/* Wait for any remaining child processes to terminate */
1089
do{
1360
do {
1090
1361
ret = wait(NULL);
1091
1362
} while(ret >= 0);
1092
1363
if(errno != ECHILD){
1093
perror("wait");
1364
error(0, errno, "wait");
1094
1365
}
1095
1366
1096
1367
free_plugin_list();
1097
1368
1098
1369
free(plugindir);
1370
free(pluginhelperdir);
1099
1371
free(argfile);
1100
1372
1101
1373
return exitstatus;
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0