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- Committer: Björn Påhlsson
- Date: 2008-08-09 12:43:14 UTC
- mfrom: (53 mandos)
- mto: (24.1.154 mandos) (237.4.3 mandos-release)
- mto: This revision was merged to the branch mainline in revision 54.
- Revision ID: belorn@braxen-20080809124314-nsbmgfi715n4pz0a
merge
- files added:
- network-protocol.txt
- files removed:
- .bzr-builddeb
- debian
- debian/po
- debian/source
- debian/tests
- debian/upstream
- dracut-module
- network-hooks.d
- plugin-helpers
- files renamed:
- plugin-runner.c => mandos-client.c
- plugin-runner.xml => mandos-client.xml
- plugins.d/mandos-client.c => plugins.d/password-request.c
- plugins.d/mandos-client.xml => plugins.d/password-request.xml
- files modified:
- Makefile
added
removed
plugins.d/password-prompt.c
1
/* -*- coding: utf-8; mode: c; mode: orgtbl -*- */
1
/* -*- coding: utf-8 -*- */
2
2
/*
3
* Password-prompt - Read a password from the terminal and print it
4
*
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
3
* Passprompt - Read a password from the terminal and print it
4
*
5
* Copyright © 2007-2008 Teddy Hogeborn & Björn Påhlsson
6
*
7
* This program is free software: you can redistribute it and/or
8
* modify it under the terms of the GNU General Public License as
9
* published by the Free Software Foundation, either version 3 of the
10
* License, or (at your option) any later version.
11
*
12
* This program is distributed in the hope that it will be useful, but
16
13
* WITHOUT ANY WARRANTY; without even the implied warranty of
17
14
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18
15
* General Public License for more details.
19
16
*
20
17
* You should have received a copy of the GNU General Public License
21
* along with Mandos. If not, see <http://www.gnu.org/licenses/>.
18
* along with this program. If not, see
19
* <http://www.gnu.org/licenses/>.
22
20
*
23
* Contact the authors at <mandos@recompile.se>.
21
* Contact the authors at <https://www.fukt.bsnet.se/~belorn/> and
22
* <https://www.fukt.bsnet.se/~teddy/>.
24
23
*/
25
24
26
#define _GNU_SOURCE /* getline(), asprintf() */
25
#define _GNU_SOURCE /* getline() */
27
26
28
#include <termios.h> /* struct termios, tcsetattr(),
27
#include <termios.h> /* struct termios, tcsetattr(),
29
28
TCSAFLUSH, tcgetattr(), ECHO */
30
#include <unistd.h> /* access(), struct termios,
31
tcsetattr(), STDIN_FILENO,
32
TCSAFLUSH, tcgetattr(), ECHO,
33
readlink() */
29
#include <unistd.h> /* struct termios, tcsetattr(),
30
STDIN_FILENO, TCSAFLUSH,
31
tcgetattr(), ECHO */
34
32
#include <signal.h> /* sig_atomic_t, raise(), struct
35
33
sigaction, sigemptyset(),
36
34
sigaction(), sigaddset(), SIGINT,
37
SIGQUIT, SIGHUP, SIGTERM,
38
raise() */
35
SIGQUIT, SIGHUP, SIGTERM */
39
36
#include <stddef.h> /* NULL, size_t, ssize_t */
40
#include <sys/types.h> /* ssize_t, struct dirent, pid_t,
41
ssize_t, open() */
37
#include <sys/types.h> /* ssize_t */
42
38
#include <stdlib.h> /* EXIT_SUCCESS, EXIT_FAILURE,
43
getenv(), free() */
44
#include <dirent.h> /* scandir(), alphasort() */
39
getopt_long */
45
40
#include <stdio.h> /* fprintf(), stderr, getline(),
46
stdin, feof(), fputc(), vfprintf(),
47
vasprintf() */
48
#include <errno.h> /* errno, EBADF, ENOTTY, EINVAL,
49
EFAULT, EFBIG, EIO, ENOSPC, EINTR
50
*/
51
#include <error.h> /* error() */
41
stdin, feof(), perror(), fputc(),
42
stdout, getopt_long */
43
#include <errno.h> /* errno, EINVAL */
52
44
#include <iso646.h> /* or, not */
53
45
#include <stdbool.h> /* bool, false, true */
54
#include <inttypes.h> /* strtoumax() */
55
#include <sys/stat.h> /* struct stat, lstat(), open() */
56
#include <string.h> /* strlen, rindex, memcmp, strerror()
57
*/
46
#include <string.h> /* strlen, rindex, strncmp, strcmp */
58
47
#include <argp.h> /* struct argp_option, struct
59
48
argp_state, struct argp,
60
49
argp_parse(), error_t,
61
50
ARGP_KEY_ARG, ARGP_KEY_END,
62
51
ARGP_ERR_UNKNOWN */
63
#include <sysexits.h> /* EX_SOFTWARE, EX_OSERR,
64
EX_UNAVAILABLE, EX_IOERR, EX_OK */
65
#include <fcntl.h> /* open() */
66
#include <stdarg.h> /* va_list, va_start(), ... */
67
52
68
volatile sig_atomic_t quit_now = 0;
69
int signal_received;
53
volatile bool quit_now = false;
70
54
bool debug = false;
71
const char *argp_program_version = "password-prompt " VERSION;
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
}
99
100
static void termination_handler(int signum){
101
if(quit_now){
102
return;
103
}
104
quit_now = 1;
105
signal_received = signum;
106
}
107
108
bool conflict_detection(void){
109
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.
113
*/
114
if(access("/run/plymouth/pid", R_OK) == 0){
115
return true;
116
}
117
118
__attribute__((nonnull))
119
int is_plymouth(const struct dirent *proc_entry){
120
int ret;
121
int cl_fd;
122
{
123
uintmax_t proc_id;
124
char *tmp;
125
errno = 0;
126
proc_id = strtoumax(proc_entry->d_name, &tmp, 10);
127
128
if(errno != 0 or *tmp != '\0'
129
or proc_id != (uintmax_t)((pid_t)proc_id)){
130
return 0;
131
}
132
}
133
134
char *cmdline_filename;
135
ret = asprintf(&cmdline_filename, "/proc/%s/cmdline",
136
proc_entry->d_name);
137
if(ret == -1){
138
error_plus(0, errno, "asprintf");
139
return 0;
140
}
141
142
/* Open /proc/<pid>/cmdline */
143
cl_fd = open(cmdline_filename, O_RDONLY);
144
free(cmdline_filename);
145
if(cl_fd == -1){
146
if(errno != ENOENT){
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);
215
return 1;
216
}
217
218
struct dirent **direntries = NULL;
219
int ret;
220
ret = scandir("/proc", &direntries, is_plymouth, alphasort);
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;
232
}
233
55
const char *argp_program_version = "passprompt 0.9";
56
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
57
58
static void termination_handler(__attribute__((unused))int signum){
59
quit_now = true;
60
}
234
61
235
62
int main(int argc, char **argv){
236
ssize_t sret;
237
int ret;
63
ssize_t ret;
238
64
size_t n;
239
65
struct termios t_new, t_old;
240
66
char *buffer = NULL;
241
67
char *prefix = NULL;
242
char *prompt = NULL;
243
68
int status = EXIT_SUCCESS;
244
69
struct sigaction old_action,
245
70
new_action = { .sa_handler = termination_handler,
248
73
struct argp_option options[] = {
249
74
{ .name = "prefix", .key = 'p',
250
75
.arg = "PREFIX", .flags = 0,
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 },
76
.doc = "Prefix used before the passprompt", .group = 2 },
255
77
{ .name = "debug", .key = 128,
256
78
.doc = "Debug mode", .group = 3 },
257
/*
258
* These reproduce what we would get without ARGP_NO_HELP
259
*/
260
{ .name = "help", .key = '?',
261
.doc = "Give this help list", .group = -1 },
262
{ .name = "usage", .key = -3,
263
.doc = "Give a short usage message", .group = -1 },
264
{ .name = "version", .key = 'V',
265
.doc = "Print program version", .group = -1 },
266
79
{ .name = NULL }
267
80
};
268
269
__attribute__((nonnull(3)))
270
error_t parse_opt (int key, char *arg, struct argp_state *state){
271
errno = 0;
272
switch (key){
273
case 'p': /* --prefix */
81
82
error_t parse_opt (int key, char *arg, struct argp_state *state) {
83
/* Get the INPUT argument from `argp_parse', which we know is a
84
pointer to our plugin list pointer. */
85
switch (key) {
86
case 'p':
274
87
prefix = arg;
275
88
break;
276
case 128: /* --debug */
89
case 128:
277
90
debug = true;
278
91
break;
279
case 129: /* --prompt */
280
prompt = arg;
92
case ARGP_KEY_ARG:
93
argp_usage (state);
281
94
break;
282
/*
283
* These reproduce what we would get without ARGP_NO_HELP
284
*/
285
case '?': /* --help */
286
argp_state_help(state, state->out_stream,
287
(ARGP_HELP_STD_HELP | ARGP_HELP_EXIT_ERR)
288
& ~(unsigned int)ARGP_HELP_EXIT_OK);
289
__builtin_unreachable();
290
case -3: /* --usage */
291
argp_state_help(state, state->out_stream,
292
ARGP_HELP_USAGE | ARGP_HELP_EXIT_ERR);
293
__builtin_unreachable();
294
case 'V': /* --version */
295
fprintf(state->out_stream, "%s\n", argp_program_version);
296
exit(argp_err_exit_status);
95
case ARGP_KEY_END:
297
96
break;
298
97
default:
299
98
return ARGP_ERR_UNKNOWN;
300
99
}
301
return errno;
100
return 0;
302
101
}
303
102
304
103
struct argp argp = { .options = options, .parser = parse_opt,
305
104
.args_doc = "",
306
.doc = "Mandos password-prompt -- Read and"
307
" output a password" };
308
ret = argp_parse(&argp, argc, argv,
309
ARGP_IN_ORDER | ARGP_NO_HELP, NULL, NULL);
310
switch(ret){
311
case 0:
312
break;
313
case ENOMEM:
314
default:
315
errno = ret;
316
error_plus(0, errno, "argp_parse");
317
return EX_OSERR;
318
case EINVAL:
319
return EX_USAGE;
105
.doc = "Mandos Passprompt -- Provides a passprompt" };
106
ret = argp_parse (&argp, argc, argv, 0, 0, NULL);
107
if (ret == ARGP_ERR_UNKNOWN){
108
perror("argp_parse");
109
return EXIT_FAILURE;
320
110
}
321
111
}
322
323
if(debug){
112
113
if (debug){
324
114
fprintf(stderr, "Starting %s\n", argv[0]);
325
115
}
326
327
if(conflict_detection()){
328
if(debug){
329
fprintf(stderr, "Stopping %s because of conflict\n", argv[0]);
330
}
331
return EXIT_FAILURE;
332
}
333
334
if(debug){
116
if (debug){
335
117
fprintf(stderr, "Storing current terminal attributes\n");
336
118
}
337
119
338
if(tcgetattr(STDIN_FILENO, &t_old) != 0){
339
int e = errno;
340
error_plus(0, errno, "tcgetattr");
341
switch(e){
342
case EBADF:
343
case ENOTTY:
344
return EX_UNAVAILABLE;
345
default:
346
return EX_OSERR;
347
}
120
if (tcgetattr(STDIN_FILENO, &t_old) != 0){
121
return EXIT_FAILURE;
348
122
}
349
123
350
124
sigemptyset(&new_action.sa_mask);
351
ret = sigaddset(&new_action.sa_mask, SIGINT);
352
if(ret == -1){
353
error_plus(0, errno, "sigaddset");
354
return EX_OSERR;
355
}
356
ret = sigaddset(&new_action.sa_mask, SIGHUP);
357
if(ret == -1){
358
error_plus(0, errno, "sigaddset");
359
return EX_OSERR;
360
}
361
ret = sigaddset(&new_action.sa_mask, SIGTERM);
362
if(ret == -1){
363
error_plus(0, errno, "sigaddset");
364
return EX_OSERR;
365
}
366
/* Need to check if the handler is SIG_IGN before handling:
367
| [[info:libc:Initial Signal Actions]] |
368
| [[info:libc:Basic Signal Handling]] |
369
*/
125
sigaddset(&new_action.sa_mask, SIGINT);
126
sigaddset(&new_action.sa_mask, SIGHUP);
127
sigaddset(&new_action.sa_mask, SIGTERM);
370
128
ret = sigaction(SIGINT, NULL, &old_action);
371
129
if(ret == -1){
372
error_plus(0, errno, "sigaction");
373
return EX_OSERR;
130
perror("sigaction");
131
return EXIT_FAILURE;
374
132
}
375
if(old_action.sa_handler != SIG_IGN){
133
if (old_action.sa_handler != SIG_IGN){
376
134
ret = sigaction(SIGINT, &new_action, NULL);
377
135
if(ret == -1){
378
error_plus(0, errno, "sigaction");
379
return EX_OSERR;
136
perror("sigaction");
137
return EXIT_FAILURE;
380
138
}
381
139
}
382
140
ret = sigaction(SIGHUP, NULL, &old_action);
383
141
if(ret == -1){
384
error_plus(0, errno, "sigaction");
385
return EX_OSERR;
142
perror("sigaction");
143
return EXIT_FAILURE;
386
144
}
387
if(old_action.sa_handler != SIG_IGN){
145
if (old_action.sa_handler != SIG_IGN){
388
146
ret = sigaction(SIGHUP, &new_action, NULL);
389
147
if(ret == -1){
390
error_plus(0, errno, "sigaction");
391
return EX_OSERR;
148
perror("sigaction");
149
return EXIT_FAILURE;
392
150
}
393
151
}
394
152
ret = sigaction(SIGTERM, NULL, &old_action);
395
153
if(ret == -1){
396
error_plus(0, errno, "sigaction");
397
return EX_OSERR;
154
perror("sigaction");
155
return EXIT_FAILURE;
398
156
}
399
if(old_action.sa_handler != SIG_IGN){
157
if (old_action.sa_handler != SIG_IGN){
400
158
ret = sigaction(SIGTERM, &new_action, NULL);
401
159
if(ret == -1){
402
error_plus(0, errno, "sigaction");
403
return EX_OSERR;
160
perror("sigaction");
161
return EXIT_FAILURE;
404
162
}
405
163
}
406
164
407
165
408
if(debug){
166
if (debug){
409
167
fprintf(stderr, "Removing echo flag from terminal attributes\n");
410
168
}
411
169
412
170
t_new = t_old;
413
t_new.c_lflag &= ~(tcflag_t)ECHO;
414
if(tcsetattr(STDIN_FILENO, TCSAFLUSH, &t_new) != 0){
415
int e = errno;
416
error_plus(0, errno, "tcsetattr-echo");
417
switch(e){
418
case EBADF:
419
case ENOTTY:
420
return EX_UNAVAILABLE;
421
case EINVAL:
422
default:
423
return EX_OSERR;
424
}
171
t_new.c_lflag &= ~ECHO;
172
if (tcsetattr(STDIN_FILENO, TCSAFLUSH, &t_new) != 0){
173
perror("tcsetattr-echo");
174
return EXIT_FAILURE;
425
175
}
426
427
if(debug){
176
177
if (debug){
428
178
fprintf(stderr, "Waiting for input from stdin \n");
429
179
}
430
180
while(true){
431
if(quit_now){
432
if(debug){
433
fprintf(stderr, "Interrupted by signal, exiting.\n");
434
}
181
if (quit_now){
435
182
status = EXIT_FAILURE;
436
183
break;
437
184
}
438
185
439
186
if(prefix){
440
fprintf(stderr, "%s ", prefix);
441
}
442
if(prompt != NULL){
443
fprintf(stderr, "%s: ", prompt);
187
fprintf(stderr, "%s Password: ", prefix);
444
188
} else {
445
const char *cryptsource = getenv("CRYPTTAB_SOURCE");
446
const char *crypttarget = getenv("CRYPTTAB_NAME");
447
/* Before cryptsetup 1.1.0~rc2 */
448
if(cryptsource == NULL){
449
cryptsource = getenv("cryptsource");
450
}
451
if(crypttarget == NULL){
452
crypttarget = getenv("crypttarget");
453
}
454
const char *const prompt1 = "Unlocking the disk";
455
const char *const prompt2 = "Enter passphrase";
456
if(cryptsource == NULL){
457
if(crypttarget == NULL){
458
fprintf(stderr, "%s to unlock the disk: ", prompt2);
459
} else {
460
fprintf(stderr, "%s (%s)\n%s: ", prompt1, crypttarget,
461
prompt2);
462
}
463
} else {
464
if(crypttarget == NULL){
465
fprintf(stderr, "%s %s\n%s: ", prompt1, cryptsource,
466
prompt2);
467
} else {
468
fprintf(stderr, "%s %s (%s)\n%s: ", prompt1, cryptsource,
469
crypttarget, prompt2);
470
}
471
}
472
}
473
sret = getline(&buffer, &n, stdin);
474
if(sret > 0){
189
fprintf(stderr, "Password: ");
190
}
191
ret = getline(&buffer, &n, stdin);
192
if (ret > 0){
193
fprintf(stdout, "%s", buffer);
475
194
status = EXIT_SUCCESS;
476
/* Make n = data size instead of allocated buffer size */
477
n = (size_t)sret;
478
/* Strip final newline */
479
if(n > 0 and buffer[n-1] == '\n'){
480
buffer[n-1] = '\0'; /* not strictly necessary */
481
n--;
482
}
483
size_t written = 0;
484
while(written < n){
485
sret = write(STDOUT_FILENO, buffer + written, n - written);
486
if(sret < 0){
487
int e = errno;
488
error_plus(0, errno, "write");
489
switch(e){
490
case EBADF:
491
case EFAULT:
492
case EINVAL:
493
case EFBIG:
494
case EIO:
495
case ENOSPC:
496
default:
497
status = EX_IOERR;
498
break;
499
case EINTR:
500
status = EXIT_FAILURE;
501
break;
502
}
503
break;
504
}
505
written += (size_t)sret;
506
}
507
sret = close(STDOUT_FILENO);
508
if(sret == -1){
509
int e = errno;
510
error_plus(0, errno, "close");
511
switch(e){
512
case EBADF:
513
status = EX_OSFILE;
514
break;
515
case EIO:
516
default:
517
status = EX_IOERR;
518
break;
519
}
520
}
521
195
break;
522
196
}
523
if(sret < 0){
524
int e = errno;
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
}
538
break;
539
} else {
540
clearerr(stdin);
541
}
197
if (ret < 0){
198
if (errno != EINTR and not feof(stdin)){
199
perror("getline");
200
status = EXIT_FAILURE;
201
break;
542
202
}
543
203
}
544
/* if(sret == 0), then the only sensible thing to do is to retry
545
to read from stdin */
204
/* if(ret == 0), then the only sensible thing to do is to retry to
205
read from stdin */
546
206
fputc('\n', stderr);
547
if(debug and not quit_now){
548
/* If quit_now is nonzero, we were interrupted by a signal, and
549
will print that later, so no need to show this too. */
550
fprintf(stderr, "getline() returned 0, retrying.\n");
551
}
552
207
}
553
208
554
free(buffer);
555
556
if(debug){
209
if (debug){
557
210
fprintf(stderr, "Restoring terminal attributes\n");
558
211
}
559
if(tcsetattr(STDIN_FILENO, TCSAFLUSH, &t_old) != 0){
560
error_plus(0, errno, "tcsetattr+echo");
561
}
562
563
if(quit_now){
564
sigemptyset(&old_action.sa_mask);
565
old_action.sa_handler = SIG_DFL;
566
ret = sigaction(signal_received, &old_action, NULL);
567
if(ret == -1){
568
error_plus(0, errno, "sigaction");
569
}
570
raise(signal_received);
571
}
572
573
if(debug){
574
fprintf(stderr, "%s is exiting with status %d\n", argv[0],
575
status);
576
}
577
if(status == EXIT_SUCCESS or status == EX_OK){
578
fputc('\n', stderr);
212
if (tcsetattr(STDIN_FILENO, TCSAFLUSH, &t_old) != 0){
213
perror("tcsetattr+echo");
214
}
215
216
if (debug){
217
fprintf(stderr, "%s is exiting\n", argv[0]);
579
218
}
580
219
581
220
return status;
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0