(root)/mandos/release
» Revision
24.1.24
(compared to revision 237.2.155)
: plugins.d/password-prompt.c
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/password-prompt.c
- browse files at revision 24.1.24
- compare with another revision
- download diff
- download tarball
- view history from revision 24.1.24
- Committer: Björn Påhlsson
- Date: 2008-08-08 01:51:58 UTC
- mto: (237.7.1 mandos) (24.1.154 mandos)
- mto: This revision was merged to the branch mainline in revision 50.
- Revision ID: belorn@braxen-20080808015158-gudud63aet3l8jlw
minor edits
- files added:
- network-protocol.txt
- files removed:
- .bzr-builddeb
- debian
- debian/po
- files renamed:
- mandos-clients.conf.xml => clients.conf.xml
- plugin-runner.c => mandos-client.c
- plugin-runner.xml => mandos-client.xml
- plugins.d/mandos-client.c => plugins.d/password-request.c
- plugins.d/mandos-client.xml => plugins.d/password-request.xml
- files modified:
- Makefile
added
removed
plugins.d/password-prompt.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
getopt_long, getenv() */
39
getopt_long */
41
40
#include <stdio.h> /* fprintf(), stderr, getline(),
42
41
stdin, feof(), perror(), fputc(),
43
getopt_long */
44
#include <errno.h> /* errno, EBADF, ENOTTY, EINVAL,
45
EFAULT, EFBIG, EIO, ENOSPC, EINTR
46
*/
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 <argp.h> /* struct argp_option,
48
struct argp_state, struct argp,
49
argp_parse() */
57
50
58
volatile sig_atomic_t quit_now = 0;
59
int signal_received;
51
volatile bool quit_now = false;
60
52
bool debug = false;
61
const char *argp_program_version = "password-prompt " VERSION;
53
const char *argp_program_version = "passprompt 0.9";
62
54
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
63
55
64
static void termination_handler(int signum){
65
if(quit_now){
66
return;
67
}
68
quit_now = 1;
69
signal_received = signum;
56
static void termination_handler(__attribute__((unused))int signum){
57
quit_now = true;
70
58
}
71
59
72
60
int main(int argc, char **argv){
83
71
struct argp_option options[] = {
84
72
{ .name = "prefix", .key = 'p',
85
73
.arg = "PREFIX", .flags = 0,
86
.doc = "Prefix shown before the prompt", .group = 2 },
74
.doc = "Prefix used before the passprompt", .group = 2 },
87
75
{ .name = "debug", .key = 128,
88
76
.doc = "Debug mode", .group = 3 },
89
77
{ .name = NULL }
90
78
};
91
92
error_t parse_opt (int key, char *arg, struct argp_state *state){
93
switch (key){
79
80
error_t parse_opt (int key, char *arg, struct argp_state *state) {
81
/* Get the INPUT argument from `argp_parse', which we know is a
82
pointer to our plugin list pointer. */
83
switch (key) {
94
84
case 'p':
95
85
prefix = arg;
96
86
break;
98
88
debug = true;
99
89
break;
100
90
case ARGP_KEY_ARG:
101
argp_usage(state);
91
argp_usage (state);
102
92
break;
103
93
case ARGP_KEY_END:
104
94
break;
107
97
}
108
98
return 0;
109
99
}
110
100
111
101
struct argp argp = { .options = options, .parser = parse_opt,
112
102
.args_doc = "",
113
.doc = "Mandos password-prompt -- Read and"
114
" output a password" };
115
ret = argp_parse(&argp, argc, argv, 0, 0, NULL);
116
if(ret == ARGP_ERR_UNKNOWN){
117
fprintf(stderr, "Unknown error while parsing arguments\n");
118
return EX_SOFTWARE;
119
}
103
.doc = "Mandos Passprompt -- Provides a passprompt" };
104
argp_parse (&argp, argc, argv, 0, 0, NULL);
120
105
}
121
122
if(debug){
106
107
if (debug){
123
108
fprintf(stderr, "Starting %s\n", argv[0]);
124
109
}
125
if(debug){
110
if (debug){
126
111
fprintf(stderr, "Storing current terminal attributes\n");
127
112
}
128
113
129
if(tcgetattr(STDIN_FILENO, &t_old) != 0){
130
int e = errno;
131
perror("tcgetattr");
132
switch(e){
133
case EBADF:
134
case ENOTTY:
135
return EX_UNAVAILABLE;
136
default:
137
return EX_OSERR;
138
}
114
if (tcgetattr(STDIN_FILENO, &t_old) != 0){
115
return EXIT_FAILURE;
139
116
}
140
117
141
118
sigemptyset(&new_action.sa_mask);
142
ret = sigaddset(&new_action.sa_mask, SIGINT);
143
if(ret == -1){
144
perror("sigaddset");
145
return EX_OSERR;
146
}
147
ret = sigaddset(&new_action.sa_mask, SIGHUP);
148
if(ret == -1){
149
perror("sigaddset");
150
return EX_OSERR;
151
}
152
ret = sigaddset(&new_action.sa_mask, SIGTERM);
153
if(ret == -1){
154
perror("sigaddset");
155
return EX_OSERR;
156
}
157
/* Need to check if the handler is SIG_IGN before handling:
158
| [[info:libc:Initial Signal Actions]] |
159
| [[info:libc:Basic Signal Handling]] |
160
*/
161
ret = sigaction(SIGINT, NULL, &old_action);
162
if(ret == -1){
163
perror("sigaction");
164
return EX_OSERR;
165
}
166
if(old_action.sa_handler != SIG_IGN){
167
ret = sigaction(SIGINT, &new_action, NULL);
168
if(ret == -1){
169
perror("sigaction");
170
return EX_OSERR;
171
}
172
}
173
ret = sigaction(SIGHUP, NULL, &old_action);
174
if(ret == -1){
175
perror("sigaction");
176
return EX_OSERR;
177
}
178
if(old_action.sa_handler != SIG_IGN){
179
ret = sigaction(SIGHUP, &new_action, NULL);
180
if(ret == -1){
181
perror("sigaction");
182
return EX_OSERR;
183
}
184
}
185
ret = sigaction(SIGTERM, NULL, &old_action);
186
if(ret == -1){
187
perror("sigaction");
188
return EX_OSERR;
189
}
190
if(old_action.sa_handler != SIG_IGN){
191
ret = sigaction(SIGTERM, &new_action, NULL);
192
if(ret == -1){
193
perror("sigaction");
194
return EX_OSERR;
195
}
196
}
197
198
199
if(debug){
119
sigaddset(&new_action.sa_mask, SIGINT);
120
sigaddset(&new_action.sa_mask, SIGHUP);
121
sigaddset(&new_action.sa_mask, SIGTERM);
122
sigaction(SIGINT, NULL, &old_action);
123
if (old_action.sa_handler != SIG_IGN)
124
sigaction(SIGINT, &new_action, NULL);
125
sigaction(SIGHUP, NULL, &old_action);
126
if (old_action.sa_handler != SIG_IGN)
127
sigaction(SIGHUP, &new_action, NULL);
128
sigaction(SIGTERM, NULL, &old_action);
129
if (old_action.sa_handler != SIG_IGN)
130
sigaction(SIGTERM, &new_action, NULL);
131
132
133
if (debug){
200
134
fprintf(stderr, "Removing echo flag from terminal attributes\n");
201
135
}
202
136
203
137
t_new = t_old;
204
t_new.c_lflag &= ~(tcflag_t)ECHO;
205
if(tcsetattr(STDIN_FILENO, TCSAFLUSH, &t_new) != 0){
206
int e = errno;
138
t_new.c_lflag &= ~ECHO;
139
if (tcsetattr(STDIN_FILENO, TCSAFLUSH, &t_new) != 0){
207
140
perror("tcsetattr-echo");
208
switch(e){
209
case EBADF:
210
case ENOTTY:
211
return EX_UNAVAILABLE;
212
case EINVAL:
213
default:
214
return EX_OSERR;
215
}
141
return EXIT_FAILURE;
216
142
}
217
218
if(debug){
143
144
if (debug){
219
145
fprintf(stderr, "Waiting for input from stdin \n");
220
146
}
221
147
while(true){
222
if(quit_now){
223
if(debug){
224
fprintf(stderr, "Interrupted by signal, exiting.\n");
225
}
148
if (quit_now){
226
149
status = EXIT_FAILURE;
227
150
break;
228
151
}
229
152
230
153
if(prefix){
231
fprintf(stderr, "%s ", prefix);
232
}
233
{
234
const char *cryptsource = getenv("cryptsource");
235
const char *crypttarget = getenv("crypttarget");
236
const char *const prompt
237
= "Enter passphrase to unlock the disk";
238
if(cryptsource == NULL){
239
if(crypttarget == NULL){
240
fprintf(stderr, "%s: ", prompt);
241
} else {
242
fprintf(stderr, "%s (%s): ", prompt, crypttarget);
243
}
244
} else {
245
if(crypttarget == NULL){
246
fprintf(stderr, "%s %s: ", prompt, cryptsource);
247
} else {
248
fprintf(stderr, "%s %s (%s): ", prompt, cryptsource,
249
crypttarget);
250
}
251
}
252
}
154
fprintf(stderr, "%s Password: ", prefix);
155
} else {
156
fprintf(stderr, "Password: ");
157
}
253
158
ret = getline(&buffer, &n, stdin);
254
if(ret > 0){
159
if (ret > 0){
160
fprintf(stdout, "%s", buffer);
255
161
status = EXIT_SUCCESS;
256
/* Make n = data size instead of allocated buffer size */
257
n = (size_t)ret;
258
/* Strip final newline */
259
if(n > 0 and buffer[n-1] == '\n'){
260
buffer[n-1] = '\0'; /* not strictly necessary */
261
n--;
262
}
263
size_t written = 0;
264
while(written < n){
265
ret = write(STDOUT_FILENO, buffer + written, n - written);
266
if(ret < 0){
267
int e = errno;
268
perror("write");
269
switch(e){
270
case EBADF:
271
case EFAULT:
272
case EINVAL:
273
case EFBIG:
274
case EIO:
275
case ENOSPC:
276
default:
277
status = EX_IOERR;
278
break;
279
case EINTR:
280
status = EXIT_FAILURE;
281
break;
282
}
283
break;
284
}
285
written += (size_t)ret;
286
}
287
ret = close(STDOUT_FILENO);
288
if(ret == -1){
289
int e = errno;
290
perror("close");
291
switch(e){
292
case EBADF:
293
status = EX_OSFILE;
294
break;
295
case EIO:
296
default:
297
status = EX_IOERR;
298
break;
299
}
300
}
301
162
break;
302
163
}
303
if(ret < 0){
304
int e = errno;
305
if(errno != EINTR and not feof(stdin)){
164
if (ret < 0){
165
if (errno != EINTR and not feof(stdin)){
306
166
perror("getline");
307
switch(e){
308
case EBADF:
309
status = EX_UNAVAILABLE;
310
case EIO:
311
case EINVAL:
312
default:
313
status = EX_IOERR;
314
break;
315
}
167
status = EXIT_FAILURE;
316
168
break;
317
169
}
318
170
}
319
171
/* if(ret == 0), then the only sensible thing to do is to retry to
320
172
read from stdin */
321
173
fputc('\n', stderr);
322
if(debug and not quit_now){
323
/* If quit_now is nonzero, we were interrupted by a signal, and
324
will print that later, so no need to show this too. */
325
fprintf(stderr, "getline() returned 0, retrying.\n");
326
}
327
174
}
328
175
329
free(buffer);
330
331
if(debug){
176
if (debug){
332
177
fprintf(stderr, "Restoring terminal attributes\n");
333
178
}
334
if(tcsetattr(STDIN_FILENO, TCSAFLUSH, &t_old) != 0){
179
if (tcsetattr(STDIN_FILENO, TCSAFLUSH, &t_old) != 0){
335
180
perror("tcsetattr+echo");
336
181
}
337
182
338
if(quit_now){
339
sigemptyset(&old_action.sa_mask);
340
old_action.sa_handler = SIG_DFL;
341
ret = sigaction(signal_received, &old_action, NULL);
342
if(ret == -1){
343
perror("sigaction");
344
}
345
raise(signal_received);
346
}
347
348
if(debug){
349
fprintf(stderr, "%s is exiting with status %d\n", argv[0],
350
status);
351
}
352
if(status == EXIT_SUCCESS or status == EX_OK){
353
fputc('\n', stderr);
183
if (debug){
184
fprintf(stderr, "%s is exiting\n", argv[0]);
354
185
}
355
186
356
187
return status;
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0