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/passprompt.c
- browse files at revision 15.1.3
- compare with another revision
- download diff
- download tarball
- view history from revision 15.1.3
- Committer: Björn Påhlsson
- Date: 2008-07-21 03:58:36 UTC
- mfrom: (17 mandos)
- mto: This revision was merged to the branch mainline in revision 20.
- Revision ID: belorn@braxen-20080721035836-v7220bmolr608r61
Added getopt_long support for mandosclient and passprompt
Added support for --interface for mandosclient
Added support for --prefix for passprompt
Added support for --interface for mandosclient
Added support for --prefix for passprompt
- files added:
- ca.pem
- files removed:
- .bzr-builddeb
- debian
- debian/po
- files renamed:
- clients.conf => mandos-clients.conf
- plugin-runner.c => plugbasedclient.c
- plugins.d/mandos-client.c => plugins.d/mandosclient.c
- plugins.d/password-prompt.c => plugins.d/passprompt.c
- mandos => server.py
- files modified:
- Makefile
added
removed
plugins.d/passprompt.c
1
/* -*- coding: utf-8; mode: c; mode: orgtbl -*- */
2
/*
3
* Password-prompt - Read a password from the terminal and print it
4
*
5
* Copyright © 2008,2009 Teddy Hogeborn
6
* Copyright © 2008,2009 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
14
* WITHOUT ANY WARRANTY; without even the implied warranty of
15
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16
* General Public License for more details.
17
*
18
* 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
*
22
* Contact the authors at <mandos@fukt.bsnet.se>.
23
*/
24
25
1
#define _GNU_SOURCE /* getline() */
26
2
#define _FORTIFY_SOURCE 2
27
3
#include <termios.h> /* struct termios, tcsetattr(),
28
4
TCSAFLUSH, tcgetattr(), ECHO */
29
5
#include <unistd.h> /* struct termios, tcsetattr(),
32
8
#include <signal.h> /* sig_atomic_t, raise(), struct
33
9
sigaction, sigemptyset(),
34
10
sigaction(), sigaddset(), SIGINT,
35
SIGQUIT, SIGHUP, SIGTERM,
36
raise() */
37
#include <stddef.h> /* NULL, size_t, ssize_t */
11
SIGQUIT, SIGHUP, SIGTERM */
12
#include <stddef.h> /* NULL, size_t */
38
13
#include <sys/types.h> /* ssize_t */
39
14
#include <stdlib.h> /* EXIT_SUCCESS, EXIT_FAILURE,
40
getenv() */
15
getopt_long */
41
16
#include <stdio.h> /* fprintf(), stderr, getline(),
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() */
17
stdin, feof(), perror(), fputc(),
18
stdout, getopt_long */
19
#include <errno.h> /* errno, EINVAL */
48
20
#include <iso646.h> /* or, not */
49
21
#include <stdbool.h> /* bool, false, true */
50
#include <string.h> /* strlen, rindex */
51
#include <argp.h> /* struct argp_option, struct
52
argp_state, struct argp,
53
argp_parse(), error_t,
54
ARGP_KEY_ARG, ARGP_KEY_END,
55
ARGP_ERR_UNKNOWN */
56
#include <sysexits.h> /* EX_SOFTWARE, EX_OSERR,
57
EX_UNAVAILABLE, EX_IOERR, EX_OK */
22
#include <string.h> /* strlen, rindex, strncmp, strcmp */
23
#include <getopt.h> /* getopt_long */
58
24
59
volatile sig_atomic_t quit_now = 0;
60
int signal_received;
25
volatile bool quit_now = false;
61
26
bool debug = false;
62
const char *argp_program_version = "password-prompt " VERSION;
63
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
64
27
65
static void termination_handler(int signum){
66
if(quit_now){
67
return;
68
}
69
quit_now = 1;
70
signal_received = signum;
28
void termination_handler(int signum){
29
quit_now = true;
71
30
}
72
31
73
32
int main(int argc, char **argv){
74
ssize_t sret;
75
int ret;
33
ssize_t ret;
76
34
size_t n;
77
35
struct termios t_new, t_old;
78
36
char *buffer = NULL;
81
39
struct sigaction old_action,
82
40
new_action = { .sa_handler = termination_handler,
83
41
.sa_flags = 0 };
84
{
85
struct argp_option options[] = {
86
{ .name = "prefix", .key = 'p',
87
.arg = "PREFIX", .flags = 0,
88
.doc = "Prefix shown before the prompt", .group = 2 },
89
{ .name = "debug", .key = 128,
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 },
100
{ .name = NULL }
101
};
102
103
error_t parse_opt (int key, char *arg, struct argp_state *state){
104
errno = 0;
105
switch (key){
106
case 'p':
107
prefix = arg;
108
break;
109
case 128:
110
debug = true;
111
break;
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);
125
break;
126
default:
127
return ARGP_ERR_UNKNOWN;
128
}
129
return errno;
42
43
while (true){
44
static struct option long_options[] = {
45
{"debug", no_argument, (int *)&debug, 1},
46
{"prefix", required_argument, 0, 'p'},
47
{0, 0, 0, 0} };
48
49
int option_index = 0;
50
ret = getopt_long (argc, argv, "p:", long_options, &option_index);
51
52
if (ret == -1){
53
break;
130
54
}
131
132
struct argp argp = { .options = options, .parser = parse_opt,
133
.args_doc = "",
134
.doc = "Mandos password-prompt -- Read and"
135
" output a password" };
136
ret = argp_parse(&argp, argc, argv,
137
ARGP_IN_ORDER | ARGP_NO_HELP, NULL, NULL);
55
138
56
switch(ret){
139
57
case 0:
140
58
break;
141
case ENOMEM:
59
case 'p':
60
prefix = optarg;
61
break;
142
62
default:
143
errno = ret;
144
error(0, errno, "argp_parse");
145
return EX_OSERR;
146
case EINVAL:
147
return EX_USAGE;
63
fprintf(stderr, "bad arguments\n");
64
exit(EXIT_FAILURE);
148
65
}
149
66
}
150
151
if(debug){
67
68
if (debug){
152
69
fprintf(stderr, "Starting %s\n", argv[0]);
153
70
}
154
if(debug){
71
if (debug){
155
72
fprintf(stderr, "Storing current terminal attributes\n");
156
73
}
157
74
158
if(tcgetattr(STDIN_FILENO, &t_old) != 0){
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
}
75
if (tcgetattr(STDIN_FILENO, &t_old) != 0){
76
return EXIT_FAILURE;
168
77
}
169
78
170
79
sigemptyset(&new_action.sa_mask);
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
*/
190
ret = sigaction(SIGINT, NULL, &old_action);
191
if(ret == -1){
192
error(0, errno, "sigaction");
193
return EX_OSERR;
194
}
195
if(old_action.sa_handler != SIG_IGN){
196
ret = sigaction(SIGINT, &new_action, NULL);
197
if(ret == -1){
198
error(0, errno, "sigaction");
199
return EX_OSERR;
200
}
201
}
202
ret = sigaction(SIGHUP, NULL, &old_action);
203
if(ret == -1){
204
error(0, errno, "sigaction");
205
return EX_OSERR;
206
}
207
if(old_action.sa_handler != SIG_IGN){
208
ret = sigaction(SIGHUP, &new_action, NULL);
209
if(ret == -1){
210
error(0, errno, "sigaction");
211
return EX_OSERR;
212
}
213
}
214
ret = sigaction(SIGTERM, NULL, &old_action);
215
if(ret == -1){
216
error(0, errno, "sigaction");
217
return EX_OSERR;
218
}
219
if(old_action.sa_handler != SIG_IGN){
220
ret = sigaction(SIGTERM, &new_action, NULL);
221
if(ret == -1){
222
error(0, errno, "sigaction");
223
return EX_OSERR;
224
}
225
}
226
227
228
if(debug){
80
sigaddset(&new_action.sa_mask, SIGINT);
81
sigaddset(&new_action.sa_mask, SIGQUIT);
82
sigaddset(&new_action.sa_mask, SIGHUP);
83
sigaddset(&new_action.sa_mask, SIGTERM);
84
sigaction(SIGINT, NULL, &old_action);
85
if (old_action.sa_handler != SIG_IGN)
86
sigaction(SIGINT, &new_action, NULL);
87
sigaction(SIGQUIT, NULL, &old_action);
88
if (old_action.sa_handler != SIG_IGN)
89
sigaction(SIGQUIT, &new_action, NULL);
90
sigaction(SIGHUP, NULL, &old_action);
91
if (old_action.sa_handler != SIG_IGN)
92
sigaction(SIGHUP, &new_action, NULL);
93
sigaction(SIGTERM, NULL, &old_action);
94
if (old_action.sa_handler != SIG_IGN)
95
sigaction(SIGTERM, &new_action, NULL);
96
97
98
if (debug){
229
99
fprintf(stderr, "Removing echo flag from terminal attributes\n");
230
100
}
231
101
232
102
t_new = t_old;
233
t_new.c_lflag &= ~(tcflag_t)ECHO;
234
if(tcsetattr(STDIN_FILENO, TCSAFLUSH, &t_new) != 0){
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
}
103
t_new.c_lflag &= ~ECHO;
104
if (tcsetattr(STDIN_FILENO, TCSAFLUSH, &t_new) != 0){
105
perror("tcsetattr-echo");
106
return EXIT_FAILURE;
245
107
}
246
247
if(debug){
108
109
if (debug){
248
110
fprintf(stderr, "Waiting for input from stdin \n");
249
111
}
250
112
while(true){
251
if(quit_now){
252
if(debug){
253
fprintf(stderr, "Interrupted by signal, exiting.\n");
254
}
113
if (quit_now){
255
114
status = EXIT_FAILURE;
256
115
break;
257
116
}
258
117
259
118
if(prefix){
260
fprintf(stderr, "%s ", prefix);
261
}
262
{
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";
274
if(cryptsource == NULL){
275
if(crypttarget == NULL){
276
fprintf(stderr, "%s to unlock the disk: ", prompt2);
277
} else {
278
fprintf(stderr, "%s (%s)\n%s: ", prompt1, crypttarget,
279
prompt2);
280
}
281
} else {
282
if(crypttarget == NULL){
283
fprintf(stderr, "%s %s\n%s: ", prompt1, cryptsource,
284
prompt2);
285
} else {
286
fprintf(stderr, "%s %s (%s)\n%s: ", prompt1, cryptsource,
287
crypttarget, prompt2);
288
}
289
}
290
}
291
sret = getline(&buffer, &n, stdin);
292
if(sret > 0){
119
fprintf(stderr, "%s Password: ", prefix);
120
} else {
121
fprintf(stderr, "Password: ");
122
}
123
ret = getline(&buffer, &n, stdin);
124
if (ret > 0){
125
fprintf(stdout, "%s", buffer);
293
126
status = EXIT_SUCCESS;
294
/* Make n = data size instead of allocated buffer size */
295
n = (size_t)sret;
296
/* Strip final newline */
297
if(n > 0 and buffer[n-1] == '\n'){
298
buffer[n-1] = '\0'; /* not strictly necessary */
299
n--;
300
}
301
size_t written = 0;
302
while(written < n){
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
}
338
}
339
127
break;
340
128
}
341
if(sret < 0){
342
int e = errno;
343
if(errno != EINTR and not feof(stdin)){
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
}
129
// ret == 0 makes no other sence than to retry to read from stdin
130
if (ret < 0){
131
if (errno != EINTR and not feof(stdin)){
132
perror("getline");
133
status = EXIT_FAILURE;
354
134
break;
355
135
}
356
136
}
357
/* if(sret == 0), then the only sensible thing to do is to retry to
358
read from stdin */
359
137
fputc('\n', stderr);
360
if(debug and not quit_now){
361
/* If quit_now is nonzero, we were interrupted by a signal, and
362
will print that later, so no need to show this too. */
363
fprintf(stderr, "getline() returned 0, retrying.\n");
364
}
365
138
}
366
367
free(buffer);
368
369
if(debug){
139
140
if (debug){
370
141
fprintf(stderr, "Restoring terminal attributes\n");
371
142
}
372
if(tcsetattr(STDIN_FILENO, TCSAFLUSH, &t_old) != 0){
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);
384
}
385
386
if(debug){
387
fprintf(stderr, "%s is exiting with status %d\n", argv[0],
388
status);
389
}
390
if(status == EXIT_SUCCESS or status == EX_OK){
391
fputc('\n', stderr);
143
if (tcsetattr(STDIN_FILENO, TCSAFLUSH, &t_old) != 0){
144
perror("tcsetattr+echo");
145
}
146
147
if (debug){
148
fprintf(stderr, "%s is exiting\n", argv[0]);
392
149
}
393
150
394
151
return status;
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0