To get this branch, use:
bzr branch
http://bzr.recompile.se/loggerhead/mandos/release
« back to all changes in this revision
Viewing changes to plugins.d/passprompt.c
- browse files at revision 32
- compare with another revision
- download diff
- download tarball
- view history from revision 32
- Committer: Teddy Hogeborn
- Date: 2008-08-01 06:56:27 UTC
- Revision ID: teddy@fukt.bsnet.se-20080801065627-2c7k4ydefjgacgnq
* plugins.d/plugbasedclient.c (set_cloexec_flag): New function.
(main): Use the set_cloexec_flag function. Move inserting of global
arguments to before the fork.
(main): Use the set_cloexec_flag function. Move inserting of global
arguments to before the fork.
- files added:
- ca.pem
- files removed:
- .bzr-builddeb
- debian
- debian/po
- files renamed:
- plugin-runner.c => plugbasedclient.c
- plugins.d/mandos-client.c => plugins.d/mandosclient.c
- plugins.d/password-prompt.c => plugins.d/passprompt.c
- mandos.conf => server.conf
- mandos => server.py
- files modified:
- Makefile
added
removed
plugins.d/passprompt.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 © 2008,2009 Teddy Hogeborn
6
* Copyright © 2008,2009 Björn Påhlsson
3
* Passprompt - Read a password from the terminal and print it
4
*
5
* Copyright © 2007-2008 Teddy Hogeborn & Björn Påhlsson
7
6
*
8
7
* This program is free software: you can redistribute it and/or
9
8
* modify it under the terms of the GNU General Public License as
19
18
* along with this program. If not, see
20
19
* <http://www.gnu.org/licenses/>.
21
20
*
22
* Contact the authors at <mandos@fukt.bsnet.se>.
21
* Contact the authors at <https://www.fukt.bsnet.se/~belorn/> and
22
* <https://www.fukt.bsnet.se/~teddy/>.
23
23
*/
24
24
25
25
#define _GNU_SOURCE /* getline() */
32
32
#include <signal.h> /* sig_atomic_t, raise(), struct
33
33
sigaction, sigemptyset(),
34
34
sigaction(), sigaddset(), SIGINT,
35
SIGQUIT, SIGHUP, SIGTERM,
36
raise() */
37
#include <stddef.h> /* NULL, size_t, ssize_t */
35
SIGQUIT, SIGHUP, SIGTERM */
36
#include <stddef.h> /* NULL, size_t */
38
37
#include <sys/types.h> /* ssize_t */
39
38
#include <stdlib.h> /* EXIT_SUCCESS, EXIT_FAILURE,
40
getenv() */
39
getopt_long */
41
40
#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
*/
41
stdin, feof(), perror(), fputc(),
42
stdout, getopt_long */
43
#include <errno.h> /* errno, EINVAL */
47
44
#include <iso646.h> /* or, not */
48
45
#include <stdbool.h> /* bool, false, true */
49
46
#include <string.h> /* strlen, rindex, strncmp, strcmp */
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 */
47
#include <getopt.h> /* getopt_long */
57
48
58
volatile sig_atomic_t quit_now = 0;
59
int signal_received;
49
volatile bool quit_now = false;
60
50
bool debug = false;
61
const char *argp_program_version = "password-prompt " VERSION;
62
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
63
51
64
static void termination_handler(int signum){
65
if(quit_now){
66
return;
67
}
68
quit_now = 1;
69
signal_received = signum;
52
void termination_handler(__attribute__((unused))int signum){
53
quit_now = true;
70
54
}
71
55
72
56
int main(int argc, char **argv){
79
63
struct sigaction old_action,
80
64
new_action = { .sa_handler = termination_handler,
81
65
.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;
66
67
while (true){
68
static struct option long_options[] = {
69
{"debug", no_argument, (int *)&debug, 1},
70
{"prefix", required_argument, 0, 'p'},
71
{0, 0, 0, 0} };
72
73
int option_index = 0;
74
ret = getopt_long (argc, argv, "p:", long_options, &option_index);
75
76
if (ret == -1){
77
break;
128
78
}
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);
79
136
80
switch(ret){
137
81
case 0:
138
82
break;
139
case ENOMEM:
83
case 'p':
84
prefix = optarg;
85
break;
140
86
default:
141
errno = ret;
142
perror("argp_parse");
143
return EX_OSERR;
144
case EINVAL:
145
return EX_USAGE;
87
fprintf(stderr, "bad arguments\n");
88
exit(EXIT_FAILURE);
146
89
}
147
90
}
148
149
if(debug){
91
92
if (debug){
150
93
fprintf(stderr, "Starting %s\n", argv[0]);
151
94
}
152
if(debug){
95
if (debug){
153
96
fprintf(stderr, "Storing current terminal attributes\n");
154
97
}
155
98
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
}
99
if (tcgetattr(STDIN_FILENO, &t_old) != 0){
100
return EXIT_FAILURE;
166
101
}
167
102
168
103
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:
185
| [[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){
104
sigaddset(&new_action.sa_mask, SIGINT);
105
sigaddset(&new_action.sa_mask, SIGQUIT);
106
sigaddset(&new_action.sa_mask, SIGHUP);
107
sigaddset(&new_action.sa_mask, SIGTERM);
108
sigaction(SIGINT, NULL, &old_action);
109
if (old_action.sa_handler != SIG_IGN)
110
sigaction(SIGINT, &new_action, NULL);
111
sigaction(SIGQUIT, NULL, &old_action);
112
if (old_action.sa_handler != SIG_IGN)
113
sigaction(SIGQUIT, &new_action, NULL);
114
sigaction(SIGHUP, NULL, &old_action);
115
if (old_action.sa_handler != SIG_IGN)
116
sigaction(SIGHUP, &new_action, NULL);
117
sigaction(SIGTERM, NULL, &old_action);
118
if (old_action.sa_handler != SIG_IGN)
119
sigaction(SIGTERM, &new_action, NULL);
120
121
122
if (debug){
227
123
fprintf(stderr, "Removing echo flag from terminal attributes\n");
228
124
}
229
125
230
126
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;
127
t_new.c_lflag &= ~ECHO;
128
if (tcsetattr(STDIN_FILENO, TCSAFLUSH, &t_new) != 0){
234
129
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
}
130
return EXIT_FAILURE;
243
131
}
244
245
if(debug){
132
133
if (debug){
246
134
fprintf(stderr, "Waiting for input from stdin \n");
247
135
}
248
136
while(true){
249
if(quit_now){
250
if(debug){
251
fprintf(stderr, "Interrupted by signal, exiting.\n");
252
}
137
if (quit_now){
253
138
status = EXIT_FAILURE;
254
139
break;
255
140
}
256
141
257
142
if(prefix){
258
fprintf(stderr, "%s ", prefix);
259
}
260
{
261
const char *cryptsource = getenv("cryptsource");
262
const char *crypttarget = getenv("crypttarget");
263
const char *const prompt
264
= "Enter passphrase to unlock the disk";
265
if(cryptsource == NULL){
266
if(crypttarget == NULL){
267
fprintf(stderr, "%s: ", prompt);
268
} else {
269
fprintf(stderr, "%s (%s): ", prompt, crypttarget);
270
}
271
} else {
272
if(crypttarget == NULL){
273
fprintf(stderr, "%s %s: ", prompt, cryptsource);
274
} else {
275
fprintf(stderr, "%s %s (%s): ", prompt, cryptsource,
276
crypttarget);
277
}
278
}
279
}
143
fprintf(stderr, "%s Password: ", prefix);
144
} else {
145
fprintf(stderr, "Password: ");
146
}
280
147
ret = getline(&buffer, &n, stdin);
281
if(ret > 0){
148
if (ret > 0){
149
fprintf(stdout, "%s", buffer);
282
150
status = EXIT_SUCCESS;
283
/* Make n = data size instead of allocated buffer size */
284
n = (size_t)ret;
285
/* Strip final newline */
286
if(n > 0 and buffer[n-1] == '\n'){
287
buffer[n-1] = '\0'; /* not strictly necessary */
288
n--;
289
}
290
size_t written = 0;
291
while(written < n){
292
ret = write(STDOUT_FILENO, buffer + written, n - written);
293
if(ret < 0){
294
int e = errno;
295
perror("write");
296
switch(e){
297
case EBADF:
298
case EFAULT:
299
case EINVAL:
300
case EFBIG:
301
case EIO:
302
case ENOSPC:
303
default:
304
status = EX_IOERR;
305
break;
306
case EINTR:
307
status = EXIT_FAILURE;
308
break;
309
}
310
break;
311
}
312
written += (size_t)ret;
313
}
314
ret = close(STDOUT_FILENO);
315
if(ret == -1){
316
int e = errno;
317
perror("close");
318
switch(e){
319
case EBADF:
320
status = EX_OSFILE;
321
break;
322
case EIO:
323
default:
324
status = EX_IOERR;
325
break;
326
}
327
}
328
151
break;
329
152
}
330
if(ret < 0){
331
int e = errno;
332
if(errno != EINTR and not feof(stdin)){
153
// ret == 0 makes no other sence than to retry to read from stdin
154
if (ret < 0){
155
if (errno != EINTR and not feof(stdin)){
333
156
perror("getline");
334
switch(e){
335
case EBADF:
336
status = EX_UNAVAILABLE;
337
case EIO:
338
case EINVAL:
339
default:
340
status = EX_IOERR;
341
break;
342
}
157
status = EXIT_FAILURE;
343
158
break;
344
159
}
345
160
}
346
/* if(ret == 0), then the only sensible thing to do is to retry to
347
read from stdin */
348
161
fputc('\n', stderr);
349
if(debug and not quit_now){
350
/* If quit_now is nonzero, we were interrupted by a signal, and
351
will print that later, so no need to show this too. */
352
fprintf(stderr, "getline() returned 0, retrying.\n");
353
}
354
162
}
355
356
free(buffer);
357
358
if(debug){
163
164
if (debug){
359
165
fprintf(stderr, "Restoring terminal attributes\n");
360
166
}
361
if(tcsetattr(STDIN_FILENO, TCSAFLUSH, &t_old) != 0){
167
if (tcsetattr(STDIN_FILENO, TCSAFLUSH, &t_old) != 0){
362
168
perror("tcsetattr+echo");
363
169
}
364
365
if(quit_now){
366
sigemptyset(&old_action.sa_mask);
367
old_action.sa_handler = SIG_DFL;
368
ret = sigaction(signal_received, &old_action, NULL);
369
if(ret == -1){
370
perror("sigaction");
371
}
372
raise(signal_received);
373
}
374
375
if(debug){
376
fprintf(stderr, "%s is exiting with status %d\n", argv[0],
377
status);
378
}
379
if(status == EXIT_SUCCESS or status == EX_OK){
380
fputc('\n', stderr);
170
171
if (debug){
172
fprintf(stderr, "%s is exiting\n", argv[0]);
381
173
}
382
174
383
175
return status;
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0