To get this branch, use:
bzr branch
http://bzr.recompile.se/loggerhead/mandos/trunk
« back to all changes in this revision
Viewing changes to plugins.d/password-prompt.c
- browse files at revision 445
- compare with another revision
- download diff
- download tarball
- view history from revision 445
- Committer: Teddy Hogeborn
- Date: 2010-09-26 21:27:28 UTC
- Revision ID: teddy@fukt.bsnet.se-20100926212728-ej205k5037nfhz2g
Update copyright year to "2010" wherever appropriate.
* plugin-runner.c: - '' -
* plugins.d/mandos-client.c: - '' -
* plugin-runner.c: - '' -
* plugins.d/mandos-client.c: - '' -
added
removed
plugins.d/password-prompt.c
1
/* -*- coding: utf-8 -*- */
1
/* -*- coding: utf-8; mode: c; mode: orgtbl -*- */
2
2
/*
3
3
* Password-prompt - Read a password from the terminal and print it
4
4
*
5
* Copyright © 2008,2009 Teddy Hogeborn
6
* Copyright © 2008,2009 Björn Påhlsson
5
* Copyright © 2008-2010 Teddy Hogeborn
6
* Copyright © 2008-2010 Björn Påhlsson
7
7
*
8
8
* This program is free software: you can redistribute it and/or
9
9
* modify it under the terms of the GNU General Public License as
19
19
* along with this program. If not, see
20
20
* <http://www.gnu.org/licenses/>.
21
21
*
22
* Contact the authors at <https://www.fukt.bsnet.se/~belorn/> and
23
* <https://www.fukt.bsnet.se/~teddy/>.
22
* Contact the authors at <mandos@fukt.bsnet.se>.
24
23
*/
25
24
26
25
#define _GNU_SOURCE /* getline() */
33
32
#include <signal.h> /* sig_atomic_t, raise(), struct
34
33
sigaction, sigemptyset(),
35
34
sigaction(), sigaddset(), SIGINT,
36
SIGQUIT, SIGHUP, SIGTERM */
35
SIGQUIT, SIGHUP, SIGTERM,
36
raise() */
37
37
#include <stddef.h> /* NULL, size_t, ssize_t */
38
38
#include <sys/types.h> /* ssize_t */
39
39
#include <stdlib.h> /* EXIT_SUCCESS, EXIT_FAILURE,
40
getopt_long, getenv() */
40
getenv() */
41
41
#include <stdio.h> /* fprintf(), stderr, getline(),
42
stdin, feof(), perror(), fputc(),
43
stdout, getopt_long */
44
#include <errno.h> /* errno, EINVAL */
42
stdin, feof(), fputc()
43
*/
44
#include <errno.h> /* errno, EBADF, ENOTTY, EINVAL,
45
EFAULT, EFBIG, EIO, ENOSPC, EINTR
46
*/
47
#include <error.h> /* error() */
45
48
#include <iso646.h> /* or, not */
46
49
#include <stdbool.h> /* bool, false, true */
47
#include <string.h> /* strlen, rindex, strncmp, strcmp */
50
#include <string.h> /* strlen, rindex */
48
51
#include <argp.h> /* struct argp_option, struct
49
52
argp_state, struct argp,
50
53
argp_parse(), error_t,
51
54
ARGP_KEY_ARG, ARGP_KEY_END,
52
55
ARGP_ERR_UNKNOWN */
56
#include <sysexits.h> /* EX_SOFTWARE, EX_OSERR,
57
EX_UNAVAILABLE, EX_IOERR, EX_OK */
53
58
54
volatile bool quit_now = false;
59
volatile sig_atomic_t quit_now = 0;
60
int signal_received;
55
61
bool debug = false;
56
62
const char *argp_program_version = "password-prompt " VERSION;
57
63
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
58
64
59
static void termination_handler(__attribute__((unused))int signum){
60
quit_now = true;
65
static void termination_handler(int signum){
66
if(quit_now){
67
return;
68
}
69
quit_now = 1;
70
signal_received = signum;
61
71
}
62
72
63
73
int main(int argc, char **argv){
64
ssize_t ret;
74
ssize_t sret;
75
int ret;
65
76
size_t n;
66
77
struct termios t_new, t_old;
67
78
char *buffer = NULL;
77
88
.doc = "Prefix shown before the prompt", .group = 2 },
78
89
{ .name = "debug", .key = 128,
79
90
.doc = "Debug mode", .group = 3 },
91
/*
92
* These reproduce what we would get without ARGP_NO_HELP
93
*/
94
{ .name = "help", .key = '?',
95
.doc = "Give this help list", .group = -1 },
96
{ .name = "usage", .key = -3,
97
.doc = "Give a short usage message", .group = -1 },
98
{ .name = "version", .key = 'V',
99
.doc = "Print program version", .group = -1 },
80
100
{ .name = NULL }
81
101
};
82
102
83
error_t parse_opt (int key, char *arg, struct argp_state *state) {
84
switch (key) {
103
error_t parse_opt (int key, char *arg, struct argp_state *state){
104
errno = 0;
105
switch (key){
85
106
case 'p':
86
107
prefix = arg;
87
108
break;
88
109
case 128:
89
110
debug = true;
90
111
break;
91
case ARGP_KEY_ARG:
92
argp_usage(state);
93
break;
94
case ARGP_KEY_END:
112
/*
113
* These reproduce what we would get without ARGP_NO_HELP
114
*/
115
case '?': /* --help */
116
argp_state_help(state, state->out_stream,
117
(ARGP_HELP_STD_HELP | ARGP_HELP_EXIT_ERR)
118
& ~(unsigned int)ARGP_HELP_EXIT_OK);
119
case -3: /* --usage */
120
argp_state_help(state, state->out_stream,
121
ARGP_HELP_USAGE | ARGP_HELP_EXIT_ERR);
122
case 'V': /* --version */
123
fprintf(state->out_stream, "%s\n", argp_program_version);
124
exit(argp_err_exit_status);
95
125
break;
96
126
default:
97
127
return ARGP_ERR_UNKNOWN;
98
128
}
99
return 0;
129
return errno;
100
130
}
101
131
102
132
struct argp argp = { .options = options, .parser = parse_opt,
103
133
.args_doc = "",
104
134
.doc = "Mandos password-prompt -- Read and"
105
135
" output a password" };
106
ret = argp_parse(&argp, argc, argv, 0, 0, NULL);
107
if(ret == ARGP_ERR_UNKNOWN){
108
fprintf(stderr, "Unknown error while parsing arguments\n");
109
return EXIT_FAILURE;
136
ret = argp_parse(&argp, argc, argv,
137
ARGP_IN_ORDER | ARGP_NO_HELP, NULL, NULL);
138
switch(ret){
139
case 0:
140
break;
141
case ENOMEM:
142
default:
143
errno = ret;
144
error(0, errno, "argp_parse");
145
return EX_OSERR;
146
case EINVAL:
147
return EX_USAGE;
110
148
}
111
149
}
112
150
118
156
}
119
157
120
158
if(tcgetattr(STDIN_FILENO, &t_old) != 0){
121
perror("tcgetattr");
122
return EXIT_FAILURE;
159
int e = errno;
160
error(0, errno, "tcgetattr");
161
switch(e){
162
case EBADF:
163
case ENOTTY:
164
return EX_UNAVAILABLE;
165
default:
166
return EX_OSERR;
167
}
123
168
}
124
169
125
170
sigemptyset(&new_action.sa_mask);
126
sigaddset(&new_action.sa_mask, SIGINT);
127
sigaddset(&new_action.sa_mask, SIGHUP);
128
sigaddset(&new_action.sa_mask, SIGTERM);
171
ret = sigaddset(&new_action.sa_mask, SIGINT);
172
if(ret == -1){
173
error(0, errno, "sigaddset");
174
return EX_OSERR;
175
}
176
ret = sigaddset(&new_action.sa_mask, SIGHUP);
177
if(ret == -1){
178
error(0, errno, "sigaddset");
179
return EX_OSERR;
180
}
181
ret = sigaddset(&new_action.sa_mask, SIGTERM);
182
if(ret == -1){
183
error(0, errno, "sigaddset");
184
return EX_OSERR;
185
}
186
/* Need to check if the handler is SIG_IGN before handling:
187
| [[info:libc:Initial Signal Actions]] |
188
| [[info:libc:Basic Signal Handling]] |
189
*/
129
190
ret = sigaction(SIGINT, NULL, &old_action);
130
191
if(ret == -1){
131
perror("sigaction");
132
return EXIT_FAILURE;
192
error(0, errno, "sigaction");
193
return EX_OSERR;
133
194
}
134
195
if(old_action.sa_handler != SIG_IGN){
135
196
ret = sigaction(SIGINT, &new_action, NULL);
136
197
if(ret == -1){
137
perror("sigaction");
138
return EXIT_FAILURE;
198
error(0, errno, "sigaction");
199
return EX_OSERR;
139
200
}
140
201
}
141
202
ret = sigaction(SIGHUP, NULL, &old_action);
142
203
if(ret == -1){
143
perror("sigaction");
144
return EXIT_FAILURE;
204
error(0, errno, "sigaction");
205
return EX_OSERR;
145
206
}
146
207
if(old_action.sa_handler != SIG_IGN){
147
208
ret = sigaction(SIGHUP, &new_action, NULL);
148
209
if(ret == -1){
149
perror("sigaction");
150
return EXIT_FAILURE;
210
error(0, errno, "sigaction");
211
return EX_OSERR;
151
212
}
152
213
}
153
214
ret = sigaction(SIGTERM, NULL, &old_action);
154
215
if(ret == -1){
155
perror("sigaction");
156
return EXIT_FAILURE;
216
error(0, errno, "sigaction");
217
return EX_OSERR;
157
218
}
158
219
if(old_action.sa_handler != SIG_IGN){
159
220
ret = sigaction(SIGTERM, &new_action, NULL);
160
221
if(ret == -1){
161
perror("sigaction");
162
return EXIT_FAILURE;
222
error(0, errno, "sigaction");
223
return EX_OSERR;
163
224
}
164
225
}
165
226
169
230
}
170
231
171
232
t_new = t_old;
172
t_new.c_lflag &= ~ECHO;
233
t_new.c_lflag &= ~(tcflag_t)ECHO;
173
234
if(tcsetattr(STDIN_FILENO, TCSAFLUSH, &t_new) != 0){
174
perror("tcsetattr-echo");
175
return EXIT_FAILURE;
235
int e = errno;
236
error(0, errno, "tcsetattr-echo");
237
switch(e){
238
case EBADF:
239
case ENOTTY:
240
return EX_UNAVAILABLE;
241
case EINVAL:
242
default:
243
return EX_OSERR;
244
}
176
245
}
177
246
178
247
if(debug){
179
248
fprintf(stderr, "Waiting for input from stdin \n");
180
249
}
191
260
fprintf(stderr, "%s ", prefix);
192
261
}
193
262
{
194
const char *cryptsource = getenv("cryptsource");
195
const char *crypttarget = getenv("crypttarget");
196
const char *const prompt
197
= "Enter passphrase to unlock the disk";
263
const char *cryptsource = getenv("CRYPTTAB_SOURCE");
264
const char *crypttarget = getenv("CRYPTTAB_NAME");
265
/* Before cryptsetup 1.1.0~rc2 */
266
if(cryptsource == NULL){
267
cryptsource = getenv("cryptsource");
268
}
269
if(crypttarget == NULL){
270
crypttarget = getenv("crypttarget");
271
}
272
const char *const prompt1 = "Unlocking the disk";
273
const char *const prompt2 = "Enter passphrase";
198
274
if(cryptsource == NULL){
199
275
if(crypttarget == NULL){
200
fprintf(stderr, "%s: ", prompt);
276
fprintf(stderr, "%s to unlock the disk: ", prompt2);
201
277
} else {
202
fprintf(stderr, "%s (%s): ", prompt, crypttarget);
278
fprintf(stderr, "%s (%s)\n%s: ", prompt1, crypttarget,
279
prompt2);
203
280
}
204
281
} else {
205
282
if(crypttarget == NULL){
206
fprintf(stderr, "%s %s: ", prompt, cryptsource);
283
fprintf(stderr, "%s %s\n%s: ", prompt1, cryptsource,
284
prompt2);
207
285
} else {
208
fprintf(stderr, "%s %s (%s): ", prompt, cryptsource,
209
crypttarget);
286
fprintf(stderr, "%s %s (%s)\n%s: ", prompt1, cryptsource,
287
crypttarget, prompt2);
210
288
}
211
289
}
212
290
}
213
ret = getline(&buffer, &n, stdin);
214
if(ret > 0){
291
sret = getline(&buffer, &n, stdin);
292
if(sret > 0){
215
293
status = EXIT_SUCCESS;
216
294
/* Make n = data size instead of allocated buffer size */
217
n = (size_t)ret;
295
n = (size_t)sret;
218
296
/* Strip final newline */
219
if(n>0 and buffer[n-1] == '\n'){
297
if(n > 0 and buffer[n-1] == '\n'){
220
298
buffer[n-1] = '\0'; /* not strictly necessary */
221
299
n--;
222
300
}
223
301
size_t written = 0;
224
302
while(written < n){
225
ret = write(STDOUT_FILENO, buffer + written, n - written);
226
if(ret < 0){
227
perror("write");
228
status = EXIT_FAILURE;
229
break;
230
}
231
written += (size_t)ret;
303
sret = write(STDOUT_FILENO, buffer + written, n - written);
304
if(sret < 0){
305
int e = errno;
306
error(0, errno, "write");
307
switch(e){
308
case EBADF:
309
case EFAULT:
310
case EINVAL:
311
case EFBIG:
312
case EIO:
313
case ENOSPC:
314
default:
315
status = EX_IOERR;
316
break;
317
case EINTR:
318
status = EXIT_FAILURE;
319
break;
320
}
321
break;
322
}
323
written += (size_t)sret;
324
}
325
sret = close(STDOUT_FILENO);
326
if(sret == -1){
327
int e = errno;
328
error(0, errno, "close");
329
switch(e){
330
case EBADF:
331
status = EX_OSFILE;
332
break;
333
case EIO:
334
default:
335
status = EX_IOERR;
336
break;
337
}
232
338
}
233
339
break;
234
340
}
235
if(ret < 0){
341
if(sret < 0){
342
int e = errno;
236
343
if(errno != EINTR and not feof(stdin)){
237
perror("getline");
238
status = EXIT_FAILURE;
344
error(0, errno, "getline");
345
switch(e){
346
case EBADF:
347
status = EX_UNAVAILABLE;
348
case EIO:
349
case EINVAL:
350
default:
351
status = EX_IOERR;
352
break;
353
}
239
354
break;
240
355
}
241
356
}
242
/* if(ret == 0), then the only sensible thing to do is to retry to
357
/* if(sret == 0), then the only sensible thing to do is to retry to
243
358
read from stdin */
244
359
fputc('\n', stderr);
245
360
if(debug and not quit_now){
246
/* If quit_now is true, we were interrupted by a signal, and
361
/* If quit_now is nonzero, we were interrupted by a signal, and
247
362
will print that later, so no need to show this too. */
248
363
fprintf(stderr, "getline() returned 0, retrying.\n");
249
364
}
255
370
fprintf(stderr, "Restoring terminal attributes\n");
256
371
}
257
372
if(tcsetattr(STDIN_FILENO, TCSAFLUSH, &t_old) != 0){
258
perror("tcsetattr+echo");
373
error(0, errno, "tcsetattr+echo");
374
}
375
376
if(quit_now){
377
sigemptyset(&old_action.sa_mask);
378
old_action.sa_handler = SIG_DFL;
379
ret = sigaction(signal_received, &old_action, NULL);
380
if(ret == -1){
381
error(0, errno, "sigaction");
382
}
383
raise(signal_received);
259
384
}
260
385
261
386
if(debug){
262
387
fprintf(stderr, "%s is exiting with status %d\n", argv[0],
263
388
status);
264
389
}
265
if(status == EXIT_SUCCESS){
390
if(status == EXIT_SUCCESS or status == EX_OK){
266
391
fputc('\n', stderr);
267
392
}
268
393
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0