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- Committer: teddy at recompile
- Date: 2020-03-21 16:48:19 UTC
- Revision ID: teddy@recompile.se-20200321164819-4x10yx9btb5e9n5z
Tags: version-1.8.10-1
Version 1.8.10-1
* Makefile (version): Change to "1.8.10".
* NEWS (Version 1.8.10): Add new entry.
* debian/changelog (1.8.10-1): - '' -
* Makefile (version): Change to "1.8.10".
* NEWS (Version 1.8.10): Add new entry.
* debian/changelog (1.8.10-1): - '' -
- files added:
- bugs.xml
- debian/tests
- debian/upstream
- dracut-module
- network-hooks.d
- plugin-helpers
- files removed:
- initramfs-tools-hook-conf
- 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 © 2008-2010 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
5
* Copyright © 2008-2019 Teddy Hogeborn
6
* Copyright © 2008-2019 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
14
16
* WITHOUT ANY WARRANTY; without even the implied warranty of
15
17
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16
18
* General Public License for more details.
17
19
*
18
20
* You should have received a copy of the GNU General Public License
19
* along with this program. If not, see
20
* <http://www.gnu.org/licenses/>.
21
* along with Mandos. If not, see <http://www.gnu.org/licenses/>.
21
22
*
22
* Contact the authors at <mandos@fukt.bsnet.se>.
23
* Contact the authors at <mandos@recompile.se>.
23
24
*/
24
25
25
26
#define _GNU_SOURCE /* getline(), asprintf() */
26
27
27
#include <termios.h> /* struct termios, tcsetattr(),
28
#include <termios.h> /* struct termios, tcsetattr(),
28
29
TCSAFLUSH, tcgetattr(), ECHO */
29
#include <unistd.h> /* struct termios, tcsetattr(),
30
STDIN_FILENO, TCSAFLUSH,
31
tcgetattr(), ECHO, readlink() */
30
#include <unistd.h> /* access(), struct termios,
31
tcsetattr(), STDIN_FILENO,
32
TCSAFLUSH, tcgetattr(), ECHO,
33
readlink() */
32
34
#include <signal.h> /* sig_atomic_t, raise(), struct
33
35
sigaction, sigemptyset(),
34
36
sigaction(), sigaddset(), SIGINT,
35
37
SIGQUIT, SIGHUP, SIGTERM,
36
38
raise() */
37
39
#include <stddef.h> /* NULL, size_t, ssize_t */
38
#include <sys/types.h> /* ssize_t, struct dirent, pid_t, ssize_t */
40
#include <sys/types.h> /* ssize_t, struct dirent, pid_t,
41
ssize_t, open() */
39
42
#include <stdlib.h> /* EXIT_SUCCESS, EXIT_FAILURE,
40
43
getenv(), free() */
41
44
#include <dirent.h> /* scandir(), alphasort() */
42
45
#include <stdio.h> /* fprintf(), stderr, getline(),
43
stdin, feof(), fputc()
44
*/
46
stdin, feof(), fputc(), vfprintf(),
47
vasprintf() */
45
48
#include <errno.h> /* errno, EBADF, ENOTTY, EINVAL,
46
49
EFAULT, EFBIG, EIO, ENOSPC, EINTR
47
50
*/
49
52
#include <iso646.h> /* or, not */
50
53
#include <stdbool.h> /* bool, false, true */
51
54
#include <inttypes.h> /* strtoumax() */
52
#include <sys/stat.h> /* struct stat, lstat() */
53
#include <string.h> /* strlen, rindex, memcmp */
55
#include <sys/stat.h> /* struct stat, lstat(), open() */
56
#include <string.h> /* strlen, rindex, memcmp, strerror()
57
*/
54
58
#include <argp.h> /* struct argp_option, struct
55
59
argp_state, struct argp,
56
60
argp_parse(), error_t,
58
62
ARGP_ERR_UNKNOWN */
59
63
#include <sysexits.h> /* EX_SOFTWARE, EX_OSERR,
60
64
EX_UNAVAILABLE, EX_IOERR, EX_OK */
65
#include <fcntl.h> /* open() */
66
#include <stdarg.h> /* va_list, va_start(), ... */
61
67
62
68
volatile sig_atomic_t quit_now = 0;
63
69
int signal_received;
64
70
bool debug = false;
65
71
const char *argp_program_version = "password-prompt " VERSION;
66
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
67
68
/* Needed for conflic resolution */
69
const char plymouthd_path[] = "/sbin/plymouth";
70
72
const char *argp_program_bug_address = "<mandos@recompile.se>";
73
74
/* Needed for conflict resolution */
75
const char plymouth_name[] = "plymouthd";
76
77
/* Function to use when printing errors */
78
__attribute__((format (gnu_printf, 3, 4)))
79
void error_plus(int status, int errnum, const char *formatstring,
80
...){
81
va_list ap;
82
char *text;
83
int ret;
84
85
va_start(ap, formatstring);
86
ret = vasprintf(&text, formatstring, ap);
87
if(ret == -1){
88
fprintf(stderr, "Mandos plugin %s: ",
89
program_invocation_short_name);
90
vfprintf(stderr, formatstring, ap);
91
fprintf(stderr, ": %s\n", strerror(errnum));
92
error(status, errno, "vasprintf while printing error");
93
return;
94
}
95
fprintf(stderr, "Mandos plugin ");
96
error(status, errnum, "%s", text);
97
free(text);
98
}
71
99
72
100
static void termination_handler(int signum){
73
101
if(quit_now){
79
107
80
108
bool conflict_detection(void){
81
109
82
/* plymouth conflicts with password-promt since both want to control the
83
associated terminal. Password-prompt exit since plymouth perferms the same
84
functionallity.
110
/* plymouth conflicts with password-prompt since both want to read
111
from the terminal. Password-prompt will exit if it detects
112
plymouth since plymouth performs the same functionality.
85
113
*/
114
if(access("/run/plymouth/pid", R_OK) == 0){
115
return true;
116
}
117
118
__attribute__((nonnull))
86
119
int is_plymouth(const struct dirent *proc_entry){
87
120
int ret;
121
int cl_fd;
88
122
{
89
uintmax_t maxvalue;
123
uintmax_t proc_id;
90
124
char *tmp;
91
125
errno = 0;
92
maxvalue = strtoumax(proc_entry->d_name, &tmp, 10);
126
proc_id = strtoumax(proc_entry->d_name, &tmp, 10);
93
127
94
128
if(errno != 0 or *tmp != '\0'
95
or maxvalue != (uintmax_t)((pid_t)maxvalue)){
129
or proc_id != (uintmax_t)((pid_t)proc_id)){
96
130
return 0;
97
131
}
98
132
}
99
char exe_target[sizeof(plymouthd_path)];
100
char *exe_link;
101
ret = asprintf(&exe_link, "/proc/%s/exe", proc_entry->d_name);
133
134
char *cmdline_filename;
135
ret = asprintf(&cmdline_filename, "/proc/%s/cmdline",
136
proc_entry->d_name);
102
137
if(ret == -1){
103
error(0, errno, "asprintf");
138
error_plus(0, errno, "asprintf");
104
139
return 0;
105
140
}
106
107
struct stat exe_stat;
108
ret = lstat(exe_link, &exe_stat);
109
if(ret == -1){
110
free(exe_link);
141
142
/* Open /proc/<pid>/cmdline */
143
cl_fd = open(cmdline_filename, O_RDONLY);
144
free(cmdline_filename);
145
if(cl_fd == -1){
111
146
if(errno != ENOENT){
112
error(0, errno, "lstat");
113
}
114
return 0;
115
}
116
117
if(not S_ISLNK(exe_stat.st_mode)
118
or exe_stat.st_uid != 0
119
or exe_stat.st_gid != 0){
120
free(exe_link);
121
return 0;
122
}
123
124
ssize_t sret = readlink(exe_link, exe_target, sizeof(exe_target));
125
free(exe_link);
126
if((sret != (ssize_t)sizeof(plymouthd_path)-1) or
127
(memcmp(plymouthd_path, exe_target,
128
sizeof(plymouthd_path)-1) != 0)){
129
return 0;
130
}
147
error_plus(0, errno, "open");
148
}
149
return 0;
150
}
151
152
char *cmdline = NULL;
153
{
154
size_t cmdline_len = 0;
155
size_t cmdline_allocated = 0;
156
char *tmp;
157
const size_t blocksize = 1024;
158
ssize_t sret;
159
do {
160
/* Allocate more space? */
161
if(cmdline_len + blocksize + 1 > cmdline_allocated){
162
tmp = realloc(cmdline, cmdline_allocated + blocksize + 1);
163
if(tmp == NULL){
164
error_plus(0, errno, "realloc");
165
free(cmdline);
166
close(cl_fd);
167
return 0;
168
}
169
cmdline = tmp;
170
cmdline_allocated += blocksize;
171
}
172
173
/* Read data */
174
sret = read(cl_fd, cmdline + cmdline_len,
175
cmdline_allocated - cmdline_len);
176
if(sret == -1){
177
error_plus(0, errno, "read");
178
free(cmdline);
179
close(cl_fd);
180
return 0;
181
}
182
cmdline_len += (size_t)sret;
183
} while(sret != 0);
184
ret = close(cl_fd);
185
if(ret == -1){
186
error_plus(0, errno, "close");
187
free(cmdline);
188
return 0;
189
}
190
cmdline[cmdline_len] = '\0'; /* Make sure it is terminated */
191
}
192
/* we now have cmdline */
193
194
/* get basename */
195
char *cmdline_base = strrchr(cmdline, '/');
196
if(cmdline_base != NULL){
197
cmdline_base += 1; /* skip the slash */
198
} else {
199
cmdline_base = cmdline;
200
}
201
202
if(strcmp(cmdline_base, plymouth_name) != 0){
203
if(debug){
204
fprintf(stderr, "\"%s\" is not \"%s\"\n", cmdline_base,
205
plymouth_name);
206
}
207
free(cmdline);
208
return 0;
209
}
210
if(debug){
211
fprintf(stderr, "\"%s\" equals \"%s\"\n", cmdline_base,
212
plymouth_name);
213
}
214
free(cmdline);
131
215
return 1;
132
216
}
133
134
struct dirent **direntries;
217
218
struct dirent **direntries = NULL;
135
219
int ret;
136
220
ret = scandir("/proc", &direntries, is_plymouth, alphasort);
137
if (ret == -1){
138
error(1, errno, "scandir");
139
}
140
if (ret < 0){
141
return 1;
142
} else {
143
return 0;
144
}
221
if(ret == -1){
222
error_plus(1, errno, "scandir");
223
}
224
{
225
int i = ret;
226
while(i--){
227
free(direntries[i]);
228
}
229
}
230
free(direntries);
231
return ret > 0;
145
232
}
146
233
147
234
152
239
struct termios t_new, t_old;
153
240
char *buffer = NULL;
154
241
char *prefix = NULL;
242
char *prompt = NULL;
155
243
int status = EXIT_SUCCESS;
156
244
struct sigaction old_action,
157
245
new_action = { .sa_handler = termination_handler,
161
249
{ .name = "prefix", .key = 'p',
162
250
.arg = "PREFIX", .flags = 0,
163
251
.doc = "Prefix shown before the prompt", .group = 2 },
252
{ .name = "prompt", .key = 129,
253
.arg = "PROMPT", .flags = 0,
254
.doc = "The prompt to show", .group = 2 },
164
255
{ .name = "debug", .key = 128,
165
256
.doc = "Debug mode", .group = 3 },
166
257
/*
175
266
{ .name = NULL }
176
267
};
177
268
269
__attribute__((nonnull(3)))
178
270
error_t parse_opt (int key, char *arg, struct argp_state *state){
179
271
errno = 0;
180
272
switch (key){
181
case 'p':
273
case 'p': /* --prefix */
182
274
prefix = arg;
183
275
break;
184
case 128:
276
case 128: /* --debug */
185
277
debug = true;
186
278
break;
279
case 129: /* --prompt */
280
prompt = arg;
281
break;
187
282
/*
188
283
* These reproduce what we would get without ARGP_NO_HELP
189
284
*/
191
286
argp_state_help(state, state->out_stream,
192
287
(ARGP_HELP_STD_HELP | ARGP_HELP_EXIT_ERR)
193
288
& ~(unsigned int)ARGP_HELP_EXIT_OK);
289
__builtin_unreachable();
194
290
case -3: /* --usage */
195
291
argp_state_help(state, state->out_stream,
196
292
ARGP_HELP_USAGE | ARGP_HELP_EXIT_ERR);
293
__builtin_unreachable();
197
294
case 'V': /* --version */
198
295
fprintf(state->out_stream, "%s\n", argp_program_version);
199
296
exit(argp_err_exit_status);
216
313
case ENOMEM:
217
314
default:
218
315
errno = ret;
219
error(0, errno, "argp_parse");
316
error_plus(0, errno, "argp_parse");
220
317
return EX_OSERR;
221
318
case EINVAL:
222
319
return EX_USAGE;
227
324
fprintf(stderr, "Starting %s\n", argv[0]);
228
325
}
229
326
230
if (conflict_detection()){
327
if(conflict_detection()){
231
328
if(debug){
232
fprintf(stderr, "Stopping %s because of conflict", argv[0]);
329
fprintf(stderr, "Stopping %s because of conflict\n", argv[0]);
233
330
}
234
331
return EXIT_FAILURE;
235
332
}
240
337
241
338
if(tcgetattr(STDIN_FILENO, &t_old) != 0){
242
339
int e = errno;
243
error(0, errno, "tcgetattr");
340
error_plus(0, errno, "tcgetattr");
244
341
switch(e){
245
342
case EBADF:
246
343
case ENOTTY:
253
350
sigemptyset(&new_action.sa_mask);
254
351
ret = sigaddset(&new_action.sa_mask, SIGINT);
255
352
if(ret == -1){
256
error(0, errno, "sigaddset");
353
error_plus(0, errno, "sigaddset");
257
354
return EX_OSERR;
258
355
}
259
356
ret = sigaddset(&new_action.sa_mask, SIGHUP);
260
357
if(ret == -1){
261
error(0, errno, "sigaddset");
358
error_plus(0, errno, "sigaddset");
262
359
return EX_OSERR;
263
360
}
264
361
ret = sigaddset(&new_action.sa_mask, SIGTERM);
265
362
if(ret == -1){
266
error(0, errno, "sigaddset");
363
error_plus(0, errno, "sigaddset");
267
364
return EX_OSERR;
268
365
}
269
366
/* Need to check if the handler is SIG_IGN before handling:
272
369
*/
273
370
ret = sigaction(SIGINT, NULL, &old_action);
274
371
if(ret == -1){
275
error(0, errno, "sigaction");
372
error_plus(0, errno, "sigaction");
276
373
return EX_OSERR;
277
374
}
278
375
if(old_action.sa_handler != SIG_IGN){
279
376
ret = sigaction(SIGINT, &new_action, NULL);
280
377
if(ret == -1){
281
error(0, errno, "sigaction");
378
error_plus(0, errno, "sigaction");
282
379
return EX_OSERR;
283
380
}
284
381
}
285
382
ret = sigaction(SIGHUP, NULL, &old_action);
286
383
if(ret == -1){
287
error(0, errno, "sigaction");
384
error_plus(0, errno, "sigaction");
288
385
return EX_OSERR;
289
386
}
290
387
if(old_action.sa_handler != SIG_IGN){
291
388
ret = sigaction(SIGHUP, &new_action, NULL);
292
389
if(ret == -1){
293
error(0, errno, "sigaction");
390
error_plus(0, errno, "sigaction");
294
391
return EX_OSERR;
295
392
}
296
393
}
297
394
ret = sigaction(SIGTERM, NULL, &old_action);
298
395
if(ret == -1){
299
error(0, errno, "sigaction");
396
error_plus(0, errno, "sigaction");
300
397
return EX_OSERR;
301
398
}
302
399
if(old_action.sa_handler != SIG_IGN){
303
400
ret = sigaction(SIGTERM, &new_action, NULL);
304
401
if(ret == -1){
305
error(0, errno, "sigaction");
402
error_plus(0, errno, "sigaction");
306
403
return EX_OSERR;
307
404
}
308
405
}
316
413
t_new.c_lflag &= ~(tcflag_t)ECHO;
317
414
if(tcsetattr(STDIN_FILENO, TCSAFLUSH, &t_new) != 0){
318
415
int e = errno;
319
error(0, errno, "tcsetattr-echo");
416
error_plus(0, errno, "tcsetattr-echo");
320
417
switch(e){
321
418
case EBADF:
322
419
case ENOTTY:
342
439
if(prefix){
343
440
fprintf(stderr, "%s ", prefix);
344
441
}
345
{
442
if(prompt != NULL){
443
fprintf(stderr, "%s: ", prompt);
444
} else {
346
445
const char *cryptsource = getenv("CRYPTTAB_SOURCE");
347
446
const char *crypttarget = getenv("CRYPTTAB_NAME");
348
447
/* Before cryptsetup 1.1.0~rc2 */
386
485
sret = write(STDOUT_FILENO, buffer + written, n - written);
387
486
if(sret < 0){
388
487
int e = errno;
389
error(0, errno, "write");
488
error_plus(0, errno, "write");
390
489
switch(e){
391
490
case EBADF:
392
491
case EFAULT:
408
507
sret = close(STDOUT_FILENO);
409
508
if(sret == -1){
410
509
int e = errno;
411
error(0, errno, "close");
510
error_plus(0, errno, "close");
412
511
switch(e){
413
512
case EBADF:
414
513
status = EX_OSFILE;
423
522
}
424
523
if(sret < 0){
425
524
int e = errno;
426
if(errno != EINTR and not feof(stdin)){
427
error(0, errno, "getline");
428
switch(e){
429
case EBADF:
430
status = EX_UNAVAILABLE;
431
case EIO:
432
case EINVAL:
433
default:
434
status = EX_IOERR;
525
if(errno != EINTR){
526
if(not feof(stdin)){
527
error_plus(0, errno, "getline");
528
switch(e){
529
case EBADF:
530
status = EX_UNAVAILABLE;
531
break;
532
case EIO:
533
case EINVAL:
534
default:
535
status = EX_IOERR;
536
break;
537
}
435
538
break;
539
} else {
540
clearerr(stdin);
436
541
}
437
break;
438
542
}
439
543
}
440
/* if(sret == 0), then the only sensible thing to do is to retry to
441
read from stdin */
544
/* if(sret == 0), then the only sensible thing to do is to retry
545
to read from stdin */
442
546
fputc('\n', stderr);
443
547
if(debug and not quit_now){
444
548
/* If quit_now is nonzero, we were interrupted by a signal, and
453
557
fprintf(stderr, "Restoring terminal attributes\n");
454
558
}
455
559
if(tcsetattr(STDIN_FILENO, TCSAFLUSH, &t_old) != 0){
456
error(0, errno, "tcsetattr+echo");
560
error_plus(0, errno, "tcsetattr+echo");
457
561
}
458
562
459
563
if(quit_now){
461
565
old_action.sa_handler = SIG_DFL;
462
566
ret = sigaction(signal_received, &old_action, NULL);
463
567
if(ret == -1){
464
error(0, errno, "sigaction");
568
error_plus(0, errno, "sigaction");
465
569
}
466
570
raise(signal_received);
467
571
}
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