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- 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(), perror(), fputc()
43
*/
44
#include <errno.h> /* errno, EBADF, ENOTTY, EINVAL,
45
EFAULT, EFBIG, EIO, ENOSPC, EINTR
46
*/
17
stdin, feof(), perror(), fputc(),
18
stdout, getopt_long */
19
#include <errno.h> /* errno, EINVAL */
47
20
#include <iso646.h> /* or, not */
48
21
#include <stdbool.h> /* bool, false, true */
49
#include <string.h> /* strlen, rindex */
50
#include <argp.h> /* struct argp_option, struct
51
argp_state, struct argp,
52
argp_parse(), error_t,
53
ARGP_KEY_ARG, ARGP_KEY_END,
54
ARGP_ERR_UNKNOWN */
55
#include <sysexits.h> /* EX_SOFTWARE, EX_OSERR,
56
EX_UNAVAILABLE, EX_IOERR, EX_OK */
22
#include <string.h> /* strlen, rindex, strncmp, strcmp */
23
#include <getopt.h> /* getopt_long */
57
24
58
volatile sig_atomic_t quit_now = 0;
59
int signal_received;
25
volatile bool quit_now = false;
60
26
bool debug = false;
61
const char *argp_program_version = "password-prompt " VERSION;
62
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
63
27
64
static void termination_handler(int signum){
65
if(quit_now){
66
return;
67
}
68
quit_now = 1;
69
signal_received = signum;
28
void termination_handler(int signum){
29
quit_now = true;
70
30
}
71
31
72
32
int main(int argc, char **argv){
79
39
struct sigaction old_action,
80
40
new_action = { .sa_handler = termination_handler,
81
41
.sa_flags = 0 };
82
{
83
struct argp_option options[] = {
84
{ .name = "prefix", .key = 'p',
85
.arg = "PREFIX", .flags = 0,
86
.doc = "Prefix shown before the prompt", .group = 2 },
87
{ .name = "debug", .key = 128,
88
.doc = "Debug mode", .group = 3 },
89
/*
90
* These reproduce what we would get without ARGP_NO_HELP
91
*/
92
{ .name = "help", .key = '?',
93
.doc = "Give this help list", .group = -1 },
94
{ .name = "usage", .key = -3,
95
.doc = "Give a short usage message", .group = -1 },
96
{ .name = "version", .key = 'V',
97
.doc = "Print program version", .group = -1 },
98
{ .name = NULL }
99
};
100
101
error_t parse_opt (int key, char *arg, struct argp_state *state){
102
errno = 0;
103
switch (key){
104
case 'p':
105
prefix = arg;
106
break;
107
case 128:
108
debug = true;
109
break;
110
/*
111
* These reproduce what we would get without ARGP_NO_HELP
112
*/
113
case '?': /* --help */
114
argp_state_help(state, state->out_stream,
115
(ARGP_HELP_STD_HELP | ARGP_HELP_EXIT_ERR)
116
& ~(unsigned int)ARGP_HELP_EXIT_OK);
117
case -3: /* --usage */
118
argp_state_help(state, state->out_stream,
119
ARGP_HELP_USAGE | ARGP_HELP_EXIT_ERR);
120
case 'V': /* --version */
121
fprintf(state->out_stream, "%s\n", argp_program_version);
122
exit(argp_err_exit_status);
123
break;
124
default:
125
return ARGP_ERR_UNKNOWN;
126
}
127
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;
128
54
}
129
130
struct argp argp = { .options = options, .parser = parse_opt,
131
.args_doc = "",
132
.doc = "Mandos password-prompt -- Read and"
133
" output a password" };
134
ret = argp_parse(&argp, argc, argv,
135
ARGP_IN_ORDER | ARGP_NO_HELP, NULL, NULL);
55
136
56
switch(ret){
137
57
case 0:
138
58
break;
139
case ENOMEM:
59
case 'p':
60
prefix = optarg;
61
break;
140
62
default:
141
errno = ret;
142
perror("argp_parse");
143
return EX_OSERR;
144
case EINVAL:
145
return EX_USAGE;
63
fprintf(stderr, "bad arguments\n");
64
exit(EXIT_FAILURE);
146
65
}
147
66
}
148
149
if(debug){
67
68
if (debug){
150
69
fprintf(stderr, "Starting %s\n", argv[0]);
151
70
}
152
if(debug){
71
if (debug){
153
72
fprintf(stderr, "Storing current terminal attributes\n");
154
73
}
155
74
156
if(tcgetattr(STDIN_FILENO, &t_old) != 0){
157
int e = errno;
158
perror("tcgetattr");
159
switch(e){
160
case EBADF:
161
case ENOTTY:
162
return EX_UNAVAILABLE;
163
default:
164
return EX_OSERR;
165
}
75
if (tcgetattr(STDIN_FILENO, &t_old) != 0){
76
return EXIT_FAILURE;
166
77
}
167
78
168
79
sigemptyset(&new_action.sa_mask);
169
ret = sigaddset(&new_action.sa_mask, SIGINT);
170
if(ret == -1){
171
perror("sigaddset");
172
return EX_OSERR;
173
}
174
ret = sigaddset(&new_action.sa_mask, SIGHUP);
175
if(ret == -1){
176
perror("sigaddset");
177
return EX_OSERR;
178
}
179
ret = sigaddset(&new_action.sa_mask, SIGTERM);
180
if(ret == -1){
181
perror("sigaddset");
182
return EX_OSERR;
183
}
184
/* Need to check if the handler is SIG_IGN before handling:
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| [[info:libc:Initial Signal Actions]] |
186
| [[info:libc:Basic Signal Handling]] |
187
*/
188
ret = sigaction(SIGINT, NULL, &old_action);
189
if(ret == -1){
190
perror("sigaction");
191
return EX_OSERR;
192
}
193
if(old_action.sa_handler != SIG_IGN){
194
ret = sigaction(SIGINT, &new_action, NULL);
195
if(ret == -1){
196
perror("sigaction");
197
return EX_OSERR;
198
}
199
}
200
ret = sigaction(SIGHUP, NULL, &old_action);
201
if(ret == -1){
202
perror("sigaction");
203
return EX_OSERR;
204
}
205
if(old_action.sa_handler != SIG_IGN){
206
ret = sigaction(SIGHUP, &new_action, NULL);
207
if(ret == -1){
208
perror("sigaction");
209
return EX_OSERR;
210
}
211
}
212
ret = sigaction(SIGTERM, NULL, &old_action);
213
if(ret == -1){
214
perror("sigaction");
215
return EX_OSERR;
216
}
217
if(old_action.sa_handler != SIG_IGN){
218
ret = sigaction(SIGTERM, &new_action, NULL);
219
if(ret == -1){
220
perror("sigaction");
221
return EX_OSERR;
222
}
223
}
224
225
226
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){
227
99
fprintf(stderr, "Removing echo flag from terminal attributes\n");
228
100
}
229
101
230
102
t_new = t_old;
231
t_new.c_lflag &= ~(tcflag_t)ECHO;
232
if(tcsetattr(STDIN_FILENO, TCSAFLUSH, &t_new) != 0){
233
int e = errno;
103
t_new.c_lflag &= ~ECHO;
104
if (tcsetattr(STDIN_FILENO, TCSAFLUSH, &t_new) != 0){
234
105
perror("tcsetattr-echo");
235
switch(e){
236
case EBADF:
237
case ENOTTY:
238
return EX_UNAVAILABLE;
239
case EINVAL:
240
default:
241
return EX_OSERR;
242
}
106
return EXIT_FAILURE;
243
107
}
244
245
if(debug){
108
109
if (debug){
246
110
fprintf(stderr, "Waiting for input from stdin \n");
247
111
}
248
112
while(true){
249
if(quit_now){
250
if(debug){
251
fprintf(stderr, "Interrupted by signal, exiting.\n");
252
}
113
if (quit_now){
253
114
status = EXIT_FAILURE;
254
115
break;
255
116
}
256
117
257
118
if(prefix){
258
fprintf(stderr, "%s ", prefix);
259
}
260
{
261
const char *cryptsource = getenv("CRYPTTAB_SOURCE");
262
const char *crypttarget = getenv("CRYPTTAB_NAME");
263
/* Before cryptsetup 1.1.0~rc2 */
264
if(cryptsource == NULL){
265
cryptsource = getenv("cryptsource");
266
}
267
if(crypttarget == NULL){
268
crypttarget = getenv("crypttarget");
269
}
270
const char *const prompt1 = "Unlocking the disk";
271
const char *const prompt2 = "Enter passphrase";
272
if(cryptsource == NULL){
273
if(crypttarget == NULL){
274
fprintf(stderr, "%s to unlock the disk: ", prompt2);
275
} else {
276
fprintf(stderr, "%s (%s)\n%s: ", prompt1, crypttarget,
277
prompt2);
278
}
279
} else {
280
if(crypttarget == NULL){
281
fprintf(stderr, "%s %s\n%s: ", prompt1, cryptsource,
282
prompt2);
283
} else {
284
fprintf(stderr, "%s %s (%s)\n%s: ", prompt1, cryptsource,
285
crypttarget, prompt2);
286
}
287
}
288
}
119
fprintf(stderr, "%s Password: ", prefix);
120
} else {
121
fprintf(stderr, "Password: ");
122
}
289
123
ret = getline(&buffer, &n, stdin);
290
if(ret > 0){
124
if (ret > 0){
125
fprintf(stdout, "%s", buffer);
291
126
status = EXIT_SUCCESS;
292
/* Make n = data size instead of allocated buffer size */
293
n = (size_t)ret;
294
/* Strip final newline */
295
if(n > 0 and buffer[n-1] == '\n'){
296
buffer[n-1] = '\0'; /* not strictly necessary */
297
n--;
298
}
299
size_t written = 0;
300
while(written < n){
301
ret = write(STDOUT_FILENO, buffer + written, n - written);
302
if(ret < 0){
303
int e = errno;
304
perror("write");
305
switch(e){
306
case EBADF:
307
case EFAULT:
308
case EINVAL:
309
case EFBIG:
310
case EIO:
311
case ENOSPC:
312
default:
313
status = EX_IOERR;
314
break;
315
case EINTR:
316
status = EXIT_FAILURE;
317
break;
318
}
319
break;
320
}
321
written += (size_t)ret;
322
}
323
ret = close(STDOUT_FILENO);
324
if(ret == -1){
325
int e = errno;
326
perror("close");
327
switch(e){
328
case EBADF:
329
status = EX_OSFILE;
330
break;
331
case EIO:
332
default:
333
status = EX_IOERR;
334
break;
335
}
336
}
337
127
break;
338
128
}
339
if(ret < 0){
340
int e = errno;
341
if(errno != EINTR and not feof(stdin)){
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)){
342
132
perror("getline");
343
switch(e){
344
case EBADF:
345
status = EX_UNAVAILABLE;
346
case EIO:
347
case EINVAL:
348
default:
349
status = EX_IOERR;
350
break;
351
}
133
status = EXIT_FAILURE;
352
134
break;
353
135
}
354
136
}
355
/* if(ret == 0), then the only sensible thing to do is to retry to
356
read from stdin */
357
137
fputc('\n', stderr);
358
if(debug and not quit_now){
359
/* If quit_now is nonzero, we were interrupted by a signal, and
360
will print that later, so no need to show this too. */
361
fprintf(stderr, "getline() returned 0, retrying.\n");
362
}
363
138
}
364
365
free(buffer);
366
367
if(debug){
139
140
if (debug){
368
141
fprintf(stderr, "Restoring terminal attributes\n");
369
142
}
370
if(tcsetattr(STDIN_FILENO, TCSAFLUSH, &t_old) != 0){
143
if (tcsetattr(STDIN_FILENO, TCSAFLUSH, &t_old) != 0){
371
144
perror("tcsetattr+echo");
372
145
}
373
374
if(quit_now){
375
sigemptyset(&old_action.sa_mask);
376
old_action.sa_handler = SIG_DFL;
377
ret = sigaction(signal_received, &old_action, NULL);
378
if(ret == -1){
379
perror("sigaction");
380
}
381
raise(signal_received);
382
}
383
384
if(debug){
385
fprintf(stderr, "%s is exiting with status %d\n", argv[0],
386
status);
387
}
388
if(status == EXIT_SUCCESS or status == EX_OK){
389
fputc('\n', stderr);
146
147
if (debug){
148
fprintf(stderr, "%s is exiting\n", argv[0]);
390
149
}
391
150
392
151
return status;
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