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- Committer: teddy at bsnet
- Date: 2011-02-11 19:37:28 UTC
- mto: This revision was merged to the branch mainline in revision 465.
- Revision ID: teddy@fukt.bsnet.se-20110211193728-q6n0lmqyz4k4ze2b
* mandos: Use unicode string literals.
- files added:
- initramfs-tools-hook-conf
- files removed:
- bugs.xml
- debian/upstream
- 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 Teddy Hogeborn
6
* Copyright © 2008-2019 Björn Påhlsson
7
*
8
* This file is part of Mandos.
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*
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
25
#define _GNU_SOURCE /* getline(), asprintf() */
27
26
28
#include <termios.h> /* struct termios, tcsetattr(),
27
#include <termios.h> /* struct termios, tcsetattr(),
29
28
TCSAFLUSH, tcgetattr(), ECHO */
30
29
#include <unistd.h> /* struct termios, tcsetattr(),
31
30
STDIN_FILENO, TCSAFLUSH,
36
35
SIGQUIT, SIGHUP, SIGTERM,
37
36
raise() */
38
37
#include <stddef.h> /* NULL, size_t, ssize_t */
39
#include <sys/types.h> /* ssize_t, struct dirent, pid_t,
40
ssize_t, open() */
38
#include <sys/types.h> /* ssize_t, struct dirent, pid_t, ssize_t */
41
39
#include <stdlib.h> /* EXIT_SUCCESS, EXIT_FAILURE,
42
40
getenv(), free() */
43
41
#include <dirent.h> /* scandir(), alphasort() */
44
42
#include <stdio.h> /* fprintf(), stderr, getline(),
45
stdin, feof(), fputc(), vfprintf(),
46
vasprintf() */
43
stdin, feof(), fputc()
44
*/
47
45
#include <errno.h> /* errno, EBADF, ENOTTY, EINVAL,
48
46
EFAULT, EFBIG, EIO, ENOSPC, EINTR
49
47
*/
51
49
#include <iso646.h> /* or, not */
52
50
#include <stdbool.h> /* bool, false, true */
53
51
#include <inttypes.h> /* strtoumax() */
54
#include <sys/stat.h> /* struct stat, lstat(), open() */
55
#include <string.h> /* strlen, rindex, memcmp, strerror()
56
*/
52
#include <sys/stat.h> /* struct stat, lstat() */
53
#include <string.h> /* strlen, rindex, memcmp */
57
54
#include <argp.h> /* struct argp_option, struct
58
55
argp_state, struct argp,
59
56
argp_parse(), error_t,
61
58
ARGP_ERR_UNKNOWN */
62
59
#include <sysexits.h> /* EX_SOFTWARE, EX_OSERR,
63
60
EX_UNAVAILABLE, EX_IOERR, EX_OK */
64
#include <fcntl.h> /* open() */
65
#include <stdarg.h> /* va_list, va_start(), ... */
66
61
67
62
volatile sig_atomic_t quit_now = 0;
68
63
int signal_received;
69
64
bool debug = false;
70
65
const char *argp_program_version = "password-prompt " VERSION;
71
const char *argp_program_bug_address = "<mandos@recompile.se>";
72
73
/* Needed for conflict resolution */
74
const char plymouth_name[] = "plymouthd";
75
76
/* Function to use when printing errors */
77
__attribute__((format (gnu_printf, 3, 4)))
78
void error_plus(int status, int errnum, const char *formatstring,
79
...){
80
va_list ap;
81
char *text;
82
int ret;
83
84
va_start(ap, formatstring);
85
ret = vasprintf(&text, formatstring, ap);
86
if(ret == -1){
87
fprintf(stderr, "Mandos plugin %s: ",
88
program_invocation_short_name);
89
vfprintf(stderr, formatstring, ap);
90
fprintf(stderr, ": %s\n", strerror(errnum));
91
error(status, errno, "vasprintf while printing error");
92
return;
93
}
94
fprintf(stderr, "Mandos plugin ");
95
error(status, errnum, "%s", text);
96
free(text);
97
}
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
98
71
99
72
static void termination_handler(int signum){
100
73
if(quit_now){
106
79
107
80
bool conflict_detection(void){
108
81
109
/* plymouth conflicts with password-prompt since both want to read
110
from the terminal. Password-prompt will exit if it detects
111
plymouth since plymouth performs the same functionality.
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.
112
85
*/
113
__attribute__((nonnull))
114
86
int is_plymouth(const struct dirent *proc_entry){
115
87
int ret;
116
int cl_fd;
117
88
{
118
uintmax_t proc_id;
89
uintmax_t maxvalue;
119
90
char *tmp;
120
91
errno = 0;
121
proc_id = strtoumax(proc_entry->d_name, &tmp, 10);
92
maxvalue = strtoumax(proc_entry->d_name, &tmp, 10);
122
93
123
94
if(errno != 0 or *tmp != '\0'
124
or proc_id != (uintmax_t)((pid_t)proc_id)){
95
or maxvalue != (uintmax_t)((pid_t)maxvalue)){
125
96
return 0;
126
97
}
127
98
}
128
129
char *cmdline_filename;
130
ret = asprintf(&cmdline_filename, "/proc/%s/cmdline",
131
proc_entry->d_name);
99
char exe_target[sizeof(plymouthd_path)];
100
char *exe_link;
101
ret = asprintf(&exe_link, "/proc/%s/exe", proc_entry->d_name);
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102
if(ret == -1){
133
error_plus(0, errno, "asprintf");
103
error(0, errno, "asprintf");
134
104
return 0;
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105
}
136
137
/* Open /proc/<pid>/cmdline */
138
cl_fd = open(cmdline_filename, O_RDONLY);
139
free(cmdline_filename);
140
if(cl_fd == -1){
106
107
struct stat exe_stat;
108
ret = lstat(exe_link, &exe_stat);
109
if(ret == -1){
110
free(exe_link);
141
111
if(errno != ENOENT){
142
error_plus(0, errno, "open");
143
}
144
return 0;
145
}
146
147
char *cmdline = NULL;
148
{
149
size_t cmdline_len = 0;
150
size_t cmdline_allocated = 0;
151
char *tmp;
152
const size_t blocksize = 1024;
153
ssize_t sret;
154
do {
155
/* Allocate more space? */
156
if(cmdline_len + blocksize + 1 > cmdline_allocated){
157
tmp = realloc(cmdline, cmdline_allocated + blocksize + 1);
158
if(tmp == NULL){
159
error_plus(0, errno, "realloc");
160
free(cmdline);
161
close(cl_fd);
162
return 0;
163
}
164
cmdline = tmp;
165
cmdline_allocated += blocksize;
166
}
167
168
/* Read data */
169
sret = read(cl_fd, cmdline + cmdline_len,
170
cmdline_allocated - cmdline_len);
171
if(sret == -1){
172
error_plus(0, errno, "read");
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free(cmdline);
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close(cl_fd);
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return 0;
176
}
177
cmdline_len += (size_t)sret;
178
} while(sret != 0);
179
ret = close(cl_fd);
180
if(ret == -1){
181
error_plus(0, errno, "close");
182
free(cmdline);
183
return 0;
184
}
185
cmdline[cmdline_len] = '\0'; /* Make sure it is terminated */
186
}
187
/* we now have cmdline */
188
189
/* get basename */
190
char *cmdline_base = strrchr(cmdline, '/');
191
if(cmdline_base != NULL){
192
cmdline_base += 1; /* skip the slash */
193
} else {
194
cmdline_base = cmdline;
195
}
196
197
if(strcmp(cmdline_base, plymouth_name) != 0){
198
if(debug){
199
fprintf(stderr, "\"%s\" is not \"%s\"\n", cmdline_base,
200
plymouth_name);
201
}
202
free(cmdline);
203
return 0;
204
}
205
if(debug){
206
fprintf(stderr, "\"%s\" equals \"%s\"\n", cmdline_base,
207
plymouth_name);
208
}
209
free(cmdline);
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
}
210
131
return 1;
211
132
}
212
213
struct dirent **direntries = NULL;
133
134
struct dirent **direntries;
214
135
int ret;
215
136
ret = scandir("/proc", &direntries, is_plymouth, alphasort);
216
if(ret == -1){
217
error_plus(1, errno, "scandir");
218
}
219
{
220
int i = ret;
221
while(i--){
222
free(direntries[i]);
223
}
224
}
225
free(direntries);
226
return ret > 0;
137
if (ret == -1){
138
error(1, errno, "scandir");
139
}
140
if (ret < 0){
141
return 1;
142
} else {
143
return 0;
144
}
227
145
}
228
146
229
147
257
175
{ .name = NULL }
258
176
};
259
177
260
__attribute__((nonnull(3)))
261
178
error_t parse_opt (int key, char *arg, struct argp_state *state){
262
179
errno = 0;
263
180
switch (key){
274
191
argp_state_help(state, state->out_stream,
275
192
(ARGP_HELP_STD_HELP | ARGP_HELP_EXIT_ERR)
276
193
& ~(unsigned int)ARGP_HELP_EXIT_OK);
277
__builtin_unreachable();
278
194
case -3: /* --usage */
279
195
argp_state_help(state, state->out_stream,
280
196
ARGP_HELP_USAGE | ARGP_HELP_EXIT_ERR);
281
__builtin_unreachable();
282
197
case 'V': /* --version */
283
198
fprintf(state->out_stream, "%s\n", argp_program_version);
284
199
exit(argp_err_exit_status);
301
216
case ENOMEM:
302
217
default:
303
218
errno = ret;
304
error_plus(0, errno, "argp_parse");
219
error(0, errno, "argp_parse");
305
220
return EX_OSERR;
306
221
case EINVAL:
307
222
return EX_USAGE;
312
227
fprintf(stderr, "Starting %s\n", argv[0]);
313
228
}
314
229
315
if(conflict_detection()){
230
if (conflict_detection()){
316
231
if(debug){
317
fprintf(stderr, "Stopping %s because of conflict\n", argv[0]);
232
fprintf(stderr, "Stopping %s because of conflict", argv[0]);
318
233
}
319
234
return EXIT_FAILURE;
320
235
}
325
240
326
241
if(tcgetattr(STDIN_FILENO, &t_old) != 0){
327
242
int e = errno;
328
error_plus(0, errno, "tcgetattr");
243
error(0, errno, "tcgetattr");
329
244
switch(e){
330
245
case EBADF:
331
246
case ENOTTY:
338
253
sigemptyset(&new_action.sa_mask);
339
254
ret = sigaddset(&new_action.sa_mask, SIGINT);
340
255
if(ret == -1){
341
error_plus(0, errno, "sigaddset");
256
error(0, errno, "sigaddset");
342
257
return EX_OSERR;
343
258
}
344
259
ret = sigaddset(&new_action.sa_mask, SIGHUP);
345
260
if(ret == -1){
346
error_plus(0, errno, "sigaddset");
261
error(0, errno, "sigaddset");
347
262
return EX_OSERR;
348
263
}
349
264
ret = sigaddset(&new_action.sa_mask, SIGTERM);
350
265
if(ret == -1){
351
error_plus(0, errno, "sigaddset");
266
error(0, errno, "sigaddset");
352
267
return EX_OSERR;
353
268
}
354
269
/* Need to check if the handler is SIG_IGN before handling:
357
272
*/
358
273
ret = sigaction(SIGINT, NULL, &old_action);
359
274
if(ret == -1){
360
error_plus(0, errno, "sigaction");
275
error(0, errno, "sigaction");
361
276
return EX_OSERR;
362
277
}
363
278
if(old_action.sa_handler != SIG_IGN){
364
279
ret = sigaction(SIGINT, &new_action, NULL);
365
280
if(ret == -1){
366
error_plus(0, errno, "sigaction");
281
error(0, errno, "sigaction");
367
282
return EX_OSERR;
368
283
}
369
284
}
370
285
ret = sigaction(SIGHUP, NULL, &old_action);
371
286
if(ret == -1){
372
error_plus(0, errno, "sigaction");
287
error(0, errno, "sigaction");
373
288
return EX_OSERR;
374
289
}
375
290
if(old_action.sa_handler != SIG_IGN){
376
291
ret = sigaction(SIGHUP, &new_action, NULL);
377
292
if(ret == -1){
378
error_plus(0, errno, "sigaction");
293
error(0, errno, "sigaction");
379
294
return EX_OSERR;
380
295
}
381
296
}
382
297
ret = sigaction(SIGTERM, NULL, &old_action);
383
298
if(ret == -1){
384
error_plus(0, errno, "sigaction");
299
error(0, errno, "sigaction");
385
300
return EX_OSERR;
386
301
}
387
302
if(old_action.sa_handler != SIG_IGN){
388
303
ret = sigaction(SIGTERM, &new_action, NULL);
389
304
if(ret == -1){
390
error_plus(0, errno, "sigaction");
305
error(0, errno, "sigaction");
391
306
return EX_OSERR;
392
307
}
393
308
}
401
316
t_new.c_lflag &= ~(tcflag_t)ECHO;
402
317
if(tcsetattr(STDIN_FILENO, TCSAFLUSH, &t_new) != 0){
403
318
int e = errno;
404
error_plus(0, errno, "tcsetattr-echo");
319
error(0, errno, "tcsetattr-echo");
405
320
switch(e){
406
321
case EBADF:
407
322
case ENOTTY:
471
386
sret = write(STDOUT_FILENO, buffer + written, n - written);
472
387
if(sret < 0){
473
388
int e = errno;
474
error_plus(0, errno, "write");
389
error(0, errno, "write");
475
390
switch(e){
476
391
case EBADF:
477
392
case EFAULT:
493
408
sret = close(STDOUT_FILENO);
494
409
if(sret == -1){
495
410
int e = errno;
496
error_plus(0, errno, "close");
411
error(0, errno, "close");
497
412
switch(e){
498
413
case EBADF:
499
414
status = EX_OSFILE;
508
423
}
509
424
if(sret < 0){
510
425
int e = errno;
511
if(errno != EINTR){
512
if(not feof(stdin)){
513
error_plus(0, errno, "getline");
514
switch(e){
515
case EBADF:
516
status = EX_UNAVAILABLE;
517
break;
518
case EIO:
519
case EINVAL:
520
default:
521
status = EX_IOERR;
522
break;
523
}
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;
524
435
break;
525
} else {
526
clearerr(stdin);
527
436
}
437
break;
528
438
}
529
439
}
530
/* if(sret == 0), then the only sensible thing to do is to retry
531
to read from stdin */
440
/* if(sret == 0), then the only sensible thing to do is to retry to
441
read from stdin */
532
442
fputc('\n', stderr);
533
443
if(debug and not quit_now){
534
444
/* If quit_now is nonzero, we were interrupted by a signal, and
543
453
fprintf(stderr, "Restoring terminal attributes\n");
544
454
}
545
455
if(tcsetattr(STDIN_FILENO, TCSAFLUSH, &t_old) != 0){
546
error_plus(0, errno, "tcsetattr+echo");
456
error(0, errno, "tcsetattr+echo");
547
457
}
548
458
549
459
if(quit_now){
551
461
old_action.sa_handler = SIG_DFL;
552
462
ret = sigaction(signal_received, &old_action, NULL);
553
463
if(ret == -1){
554
error_plus(0, errno, "sigaction");
464
error(0, errno, "sigaction");
555
465
}
556
466
raise(signal_received);
557
467
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0