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- Committer: Teddy Hogeborn
- Date: 2011-03-08 19:09:03 UTC
- Revision ID: teddy@fukt.bsnet.se-20110308190903-j499ebtb9bpk31ar
* INSTALL: Updated.
- files added:
- initramfs-tools-hook-conf
- files removed:
- bugs.xml
- debian/tests
- debian/upstream
- dracut-module
- network-hooks.d
- plugin-helpers
- files modified:
- .bzrignore
added
removed
plugins.d/password-prompt.c
2
2
/*
3
3
* Password-prompt - Read a password from the terminal and print it
4
4
*
5
* Copyright © 2008-2019, 2021 Teddy Hogeborn
6
* Copyright © 2008-2019, 2021 Björn Påhlsson
7
*
8
* This file is part of Mandos.
9
*
10
* Mandos is free software: you can redistribute it and/or modify it
11
* under the terms of the GNU General Public License as published by
12
* the Free Software Foundation, either version 3 of the License, or
13
* (at your option) any later version.
14
*
15
* Mandos is distributed in the hope that it will be useful, but
5
* Copyright © 2008-2010 Teddy Hogeborn
6
* Copyright © 2008-2010 Björn Påhlsson
7
*
8
* This program is free software: you can redistribute it and/or
9
* modify it under the terms of the GNU General Public License as
10
* published by the Free Software Foundation, either version 3 of the
11
* License, or (at your option) any later version.
12
*
13
* This program is distributed in the hope that it will be useful, but
16
14
* WITHOUT ANY WARRANTY; without even the implied warranty of
17
15
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18
16
* General Public License for more details.
19
17
*
20
18
* You should have received a copy of the GNU General Public License
21
* along with Mandos. If not, see <http://www.gnu.org/licenses/>.
19
* along with this program. If not, see
20
* <http://www.gnu.org/licenses/>.
22
21
*
23
* Contact the authors at <mandos@recompile.se>.
22
* Contact the authors at <mandos@fukt.bsnet.se>.
24
23
*/
25
24
26
#define _GNU_SOURCE /* vasprintf(),
27
program_invocation_short_name,
28
asprintf(), getline() */
29
#include <sys/types.h> /* sig_atomic_t, pid_t */
25
#define _GNU_SOURCE /* getline(), asprintf() */
26
27
#include <termios.h> /* struct termios, tcsetattr(),
28
TCSAFLUSH, tcgetattr(), ECHO */
29
#include <unistd.h> /* struct termios, tcsetattr(),
30
STDIN_FILENO, TCSAFLUSH,
31
tcgetattr(), ECHO, readlink() */
32
#include <signal.h> /* sig_atomic_t, raise(), struct
33
sigaction, sigemptyset(),
34
sigaction(), sigaddset(), SIGINT,
35
SIGQUIT, SIGHUP, SIGTERM,
36
raise() */
37
#include <stddef.h> /* NULL, size_t, ssize_t */
38
#include <sys/types.h> /* ssize_t, struct dirent, pid_t,
39
ssize_t, open() */
40
#include <stdlib.h> /* EXIT_SUCCESS, EXIT_FAILURE,
41
getenv(), free() */
42
#include <dirent.h> /* scandir(), alphasort() */
43
#include <stdio.h> /* fprintf(), stderr, getline(),
44
stdin, feof(), fputc()
45
*/
46
#include <errno.h> /* errno, EBADF, ENOTTY, EINVAL,
47
EFAULT, EFBIG, EIO, ENOSPC, EINTR
48
*/
49
#include <error.h> /* error() */
50
#include <iso646.h> /* or, not */
30
51
#include <stdbool.h> /* bool, false, true */
31
#include <argp.h> /* argp_program_version,
32
argp_program_bug_address,
33
struct argp_option,
34
struct argp_state, argp_state_help,
35
ARGP_HELP_STD_HELP,
36
ARGP_HELP_EXIT_ERR,
37
ARGP_HELP_EXIT_OK, ARGP_HELP_USAGE,
38
argp_err_exit_status,
39
ARGP_ERR_UNKNOWN, argp_parse(),
40
ARGP_IN_ORDER, ARGP_NO_HELP */
41
#include <stdarg.h> /* va_list, va_start(), vfprintf() */
42
#include <stdio.h> /* vasprintf(), fprintf(), stderr,
43
vfprintf(), asprintf(), getline(),
44
stdin, feof(), clearerr(),
45
fputc() */
46
#include <errno.h> /* program_invocation_short_name,
47
errno, ENOENT, error_t, ENOMEM,
48
EINVAL, EBADF, ENOTTY, EFAULT,
49
EFBIG, EIO, ENOSPC, EINTR */
50
#include <string.h> /* strerror(), strrchr(), strcmp() */
51
#include <error.h> /* error() */
52
#include <stdlib.h> /* free(), realloc(), EXIT_SUCCESS,
53
EXIT_FAILURE, getenv() */
54
#include <unistd.h> /* access(), R_OK, ssize_t, close(),
55
read(), STDIN_FILENO, write(),
56
STDOUT_FILENO */
57
#include <dirent.h> /* struct dirent, scandir(),
58
alphasort() */
59
#include <inttypes.h> /* uintmax_t, strtoumax() */
60
#include <iso646.h> /* or, and, not */
61
#include <fcntl.h> /* open(), O_RDONLY */
62
#include <stddef.h> /* NULL, size_t */
63
#include <termios.h> /* struct termios, tcgetattr(),
64
tcflag_t, ECHO, tcsetattr(),
65
TCSAFLUSH */
66
#include <signal.h> /* struct sigaction, sigemptyset(),
67
sigaddset(), SIGINT, SIGHUP,
68
SIGTERM, SIG_IGN, SIG_DFL,
69
raise() */
70
#include <sysexits.h> /* EX_OSERR, EX_USAGE, EX_UNAVAILABLE,
71
EX_IOERR, EX_OSFILE, EX_OK */
52
#include <inttypes.h> /* strtoumax() */
53
#include <sys/stat.h> /* struct stat, lstat(), open() */
54
#include <string.h> /* strlen, rindex, memcmp */
55
#include <argp.h> /* struct argp_option, struct
56
argp_state, struct argp,
57
argp_parse(), error_t,
58
ARGP_KEY_ARG, ARGP_KEY_END,
59
ARGP_ERR_UNKNOWN */
60
#include <sysexits.h> /* EX_SOFTWARE, EX_OSERR,
61
EX_UNAVAILABLE, EX_IOERR, EX_OK */
62
#include <fcntl.h> /* open() */
72
63
73
64
volatile sig_atomic_t quit_now = 0;
74
65
int signal_received;
75
66
bool debug = false;
76
67
const char *argp_program_version = "password-prompt " VERSION;
77
const char *argp_program_bug_address = "<mandos@recompile.se>";
68
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
78
69
79
70
/* Needed for conflict resolution */
80
71
const char plymouth_name[] = "plymouthd";
81
72
82
/* Function to use when printing errors */
83
__attribute__((format (gnu_printf, 3, 4)))
84
void error_plus(int status, int errnum, const char *formatstring,
85
...){
86
va_list ap;
87
char *text;
88
int ret;
89
90
va_start(ap, formatstring);
91
ret = vasprintf(&text, formatstring, ap);
92
if(ret == -1){
93
fprintf(stderr, "Mandos plugin %s: ",
94
program_invocation_short_name);
95
vfprintf(stderr, formatstring, ap);
96
fprintf(stderr, ": %s\n", strerror(errnum));
97
error(status, errno, "vasprintf while printing error");
98
return;
99
}
100
fprintf(stderr, "Mandos plugin ");
101
error(status, errnum, "%s", text);
102
free(text);
103
}
104
105
73
static void termination_handler(int signum){
106
74
if(quit_now){
107
75
return;
116
84
from the terminal. Password-prompt will exit if it detects
117
85
plymouth since plymouth performs the same functionality.
118
86
*/
119
if(access("/run/plymouth/pid", R_OK) == 0){
120
return true;
121
}
122
123
__attribute__((nonnull))
124
87
int is_plymouth(const struct dirent *proc_entry){
125
88
int ret;
126
89
int cl_fd;
127
90
{
128
uintmax_t proc_id;
91
uintmax_t maxvalue;
129
92
char *tmp;
130
93
errno = 0;
131
proc_id = strtoumax(proc_entry->d_name, &tmp, 10);
94
maxvalue = strtoumax(proc_entry->d_name, &tmp, 10);
132
95
133
96
if(errno != 0 or *tmp != '\0'
134
or proc_id != (uintmax_t)((pid_t)proc_id)){
97
or maxvalue != (uintmax_t)((pid_t)maxvalue)){
135
98
return 0;
136
99
}
137
100
}
140
103
ret = asprintf(&cmdline_filename, "/proc/%s/cmdline",
141
104
proc_entry->d_name);
142
105
if(ret == -1){
143
error_plus(0, errno, "asprintf");
106
error(0, errno, "asprintf");
144
107
return 0;
145
108
}
146
109
148
111
cl_fd = open(cmdline_filename, O_RDONLY);
149
112
free(cmdline_filename);
150
113
if(cl_fd == -1){
151
if(errno != ENOENT){
152
error_plus(0, errno, "open");
153
}
114
error(0, errno, "open");
154
115
return 0;
155
116
}
156
117
166
127
if(cmdline_len + blocksize + 1 > cmdline_allocated){
167
128
tmp = realloc(cmdline, cmdline_allocated + blocksize + 1);
168
129
if(tmp == NULL){
169
error_plus(0, errno, "realloc");
130
error(0, errno, "realloc");
170
131
free(cmdline);
171
132
close(cl_fd);
172
133
return 0;
179
140
sret = read(cl_fd, cmdline + cmdline_len,
180
141
cmdline_allocated - cmdline_len);
181
142
if(sret == -1){
182
error_plus(0, errno, "read");
143
error(0, errno, "read");
183
144
free(cmdline);
184
145
close(cl_fd);
185
146
return 0;
188
149
} while(sret != 0);
189
150
ret = close(cl_fd);
190
151
if(ret == -1){
191
error_plus(0, errno, "close");
152
error(0, errno, "close");
192
153
free(cmdline);
193
154
return 0;
194
155
}
220
181
return 1;
221
182
}
222
183
223
struct dirent **direntries = NULL;
184
struct dirent **direntries;
224
185
int ret;
225
186
ret = scandir("/proc", &direntries, is_plymouth, alphasort);
226
if(ret == -1){
227
error_plus(1, errno, "scandir");
228
}
229
{
230
int i = ret;
231
while(i--){
232
free(direntries[i]);
233
}
234
}
235
free(direntries);
187
if (ret == -1){
188
error(1, errno, "scandir");
189
}
236
190
return ret > 0;
237
191
}
238
192
244
198
struct termios t_new, t_old;
245
199
char *buffer = NULL;
246
200
char *prefix = NULL;
247
char *prompt = NULL;
248
201
int status = EXIT_SUCCESS;
249
202
struct sigaction old_action,
250
203
new_action = { .sa_handler = termination_handler,
254
207
{ .name = "prefix", .key = 'p',
255
208
.arg = "PREFIX", .flags = 0,
256
209
.doc = "Prefix shown before the prompt", .group = 2 },
257
{ .name = "prompt", .key = 129,
258
.arg = "PROMPT", .flags = 0,
259
.doc = "The prompt to show", .group = 2 },
260
210
{ .name = "debug", .key = 128,
261
211
.doc = "Debug mode", .group = 3 },
262
212
/*
271
221
{ .name = NULL }
272
222
};
273
223
274
__attribute__((nonnull(3)))
275
224
error_t parse_opt (int key, char *arg, struct argp_state *state){
276
225
errno = 0;
277
226
switch (key){
278
case 'p': /* --prefix */
227
case 'p':
279
228
prefix = arg;
280
229
break;
281
case 128: /* --debug */
230
case 128:
282
231
debug = true;
283
232
break;
284
case 129: /* --prompt */
285
prompt = arg;
286
break;
287
233
/*
288
234
* These reproduce what we would get without ARGP_NO_HELP
289
235
*/
291
237
argp_state_help(state, state->out_stream,
292
238
(ARGP_HELP_STD_HELP | ARGP_HELP_EXIT_ERR)
293
239
& ~(unsigned int)ARGP_HELP_EXIT_OK);
294
__builtin_unreachable();
295
240
case -3: /* --usage */
296
241
argp_state_help(state, state->out_stream,
297
242
ARGP_HELP_USAGE | ARGP_HELP_EXIT_ERR);
298
__builtin_unreachable();
299
243
case 'V': /* --version */
300
244
fprintf(state->out_stream, "%s\n", argp_program_version);
301
245
exit(argp_err_exit_status);
318
262
case ENOMEM:
319
263
default:
320
264
errno = ret;
321
error_plus(0, errno, "argp_parse");
265
error(0, errno, "argp_parse");
322
266
return EX_OSERR;
323
267
case EINVAL:
324
268
return EX_USAGE;
329
273
fprintf(stderr, "Starting %s\n", argv[0]);
330
274
}
331
275
332
if(conflict_detection()){
276
if (conflict_detection()){
333
277
if(debug){
334
278
fprintf(stderr, "Stopping %s because of conflict\n", argv[0]);
335
279
}
342
286
343
287
if(tcgetattr(STDIN_FILENO, &t_old) != 0){
344
288
int e = errno;
345
error_plus(0, errno, "tcgetattr");
289
error(0, errno, "tcgetattr");
346
290
switch(e){
347
291
case EBADF:
348
292
case ENOTTY:
355
299
sigemptyset(&new_action.sa_mask);
356
300
ret = sigaddset(&new_action.sa_mask, SIGINT);
357
301
if(ret == -1){
358
error_plus(0, errno, "sigaddset");
302
error(0, errno, "sigaddset");
359
303
return EX_OSERR;
360
304
}
361
305
ret = sigaddset(&new_action.sa_mask, SIGHUP);
362
306
if(ret == -1){
363
error_plus(0, errno, "sigaddset");
307
error(0, errno, "sigaddset");
364
308
return EX_OSERR;
365
309
}
366
310
ret = sigaddset(&new_action.sa_mask, SIGTERM);
367
311
if(ret == -1){
368
error_plus(0, errno, "sigaddset");
312
error(0, errno, "sigaddset");
369
313
return EX_OSERR;
370
314
}
371
315
/* Need to check if the handler is SIG_IGN before handling:
374
318
*/
375
319
ret = sigaction(SIGINT, NULL, &old_action);
376
320
if(ret == -1){
377
error_plus(0, errno, "sigaction");
321
error(0, errno, "sigaction");
378
322
return EX_OSERR;
379
323
}
380
324
if(old_action.sa_handler != SIG_IGN){
381
325
ret = sigaction(SIGINT, &new_action, NULL);
382
326
if(ret == -1){
383
error_plus(0, errno, "sigaction");
327
error(0, errno, "sigaction");
384
328
return EX_OSERR;
385
329
}
386
330
}
387
331
ret = sigaction(SIGHUP, NULL, &old_action);
388
332
if(ret == -1){
389
error_plus(0, errno, "sigaction");
333
error(0, errno, "sigaction");
390
334
return EX_OSERR;
391
335
}
392
336
if(old_action.sa_handler != SIG_IGN){
393
337
ret = sigaction(SIGHUP, &new_action, NULL);
394
338
if(ret == -1){
395
error_plus(0, errno, "sigaction");
339
error(0, errno, "sigaction");
396
340
return EX_OSERR;
397
341
}
398
342
}
399
343
ret = sigaction(SIGTERM, NULL, &old_action);
400
344
if(ret == -1){
401
error_plus(0, errno, "sigaction");
345
error(0, errno, "sigaction");
402
346
return EX_OSERR;
403
347
}
404
348
if(old_action.sa_handler != SIG_IGN){
405
349
ret = sigaction(SIGTERM, &new_action, NULL);
406
350
if(ret == -1){
407
error_plus(0, errno, "sigaction");
351
error(0, errno, "sigaction");
408
352
return EX_OSERR;
409
353
}
410
354
}
418
362
t_new.c_lflag &= ~(tcflag_t)ECHO;
419
363
if(tcsetattr(STDIN_FILENO, TCSAFLUSH, &t_new) != 0){
420
364
int e = errno;
421
error_plus(0, errno, "tcsetattr-echo");
365
error(0, errno, "tcsetattr-echo");
422
366
switch(e){
423
367
case EBADF:
424
368
case ENOTTY:
444
388
if(prefix){
445
389
fprintf(stderr, "%s ", prefix);
446
390
}
447
if(prompt != NULL){
448
fprintf(stderr, "%s: ", prompt);
449
} else {
391
{
450
392
const char *cryptsource = getenv("CRYPTTAB_SOURCE");
451
393
const char *crypttarget = getenv("CRYPTTAB_NAME");
452
394
/* Before cryptsetup 1.1.0~rc2 */
490
432
sret = write(STDOUT_FILENO, buffer + written, n - written);
491
433
if(sret < 0){
492
434
int e = errno;
493
error_plus(0, errno, "write");
435
error(0, errno, "write");
494
436
switch(e){
495
437
case EBADF:
496
438
case EFAULT:
512
454
sret = close(STDOUT_FILENO);
513
455
if(sret == -1){
514
456
int e = errno;
515
error_plus(0, errno, "close");
457
error(0, errno, "close");
516
458
switch(e){
517
459
case EBADF:
518
460
status = EX_OSFILE;
527
469
}
528
470
if(sret < 0){
529
471
int e = errno;
530
if(errno != EINTR){
531
if(not feof(stdin)){
532
error_plus(0, errno, "getline");
533
switch(e){
534
case EBADF:
535
status = EX_UNAVAILABLE;
536
break;
537
case EIO:
538
case EINVAL:
539
default:
540
status = EX_IOERR;
541
break;
542
}
472
if(errno != EINTR and not feof(stdin)){
473
error(0, errno, "getline");
474
switch(e){
475
case EBADF:
476
status = EX_UNAVAILABLE;
477
case EIO:
478
case EINVAL:
479
default:
480
status = EX_IOERR;
543
481
break;
544
} else {
545
clearerr(stdin);
546
482
}
483
break;
547
484
}
548
485
}
549
486
/* if(sret == 0), then the only sensible thing to do is to retry
562
499
fprintf(stderr, "Restoring terminal attributes\n");
563
500
}
564
501
if(tcsetattr(STDIN_FILENO, TCSAFLUSH, &t_old) != 0){
565
error_plus(0, errno, "tcsetattr+echo");
502
error(0, errno, "tcsetattr+echo");
566
503
}
567
504
568
505
if(quit_now){
570
507
old_action.sa_handler = SIG_DFL;
571
508
ret = sigaction(signal_received, &old_action, NULL);
572
509
if(ret == -1){
573
error_plus(0, errno, "sigaction");
510
error(0, errno, "sigaction");
574
511
}
575
512
raise(signal_received);
576
513
}
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