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 19
- compare with another revision
- download diff
- download tarball
- view history from revision 19
- Committer: Teddy Hogeborn
- Date: 2008-07-21 02:35:05 UTC
- Revision ID: teddy@fukt.bsnet.se-20080721023505-x7pjntkgur2h5jkg
* plugins.d/mandosclient.c (start_mandos_communcation): Renamed to
"start_mandos_communication"
"start_mandos_communication"
- 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
#include <stdlib.h> /* EXIT_SUCCESS, EXIT_FAILURE,
40
getopt_long, getenv() */
14
#include <stdlib.h> /* EXIT_SUCCESS, EXIT_FAILURE */
41
15
#include <stdio.h> /* fprintf(), stderr, getline(),
42
16
stdin, feof(), perror(), fputc(),
43
stdout, getopt_long */
17
stdout */
44
18
#include <errno.h> /* errno, EINVAL */
45
19
#include <iso646.h> /* or, not */
46
20
#include <stdbool.h> /* bool, false, true */
47
21
#include <string.h> /* strlen, rindex, strncmp, strcmp */
48
#include <argp.h> /* struct argp_option, struct
49
argp_state, struct argp,
50
argp_parse(), error_t,
51
ARGP_KEY_ARG, ARGP_KEY_END,
52
ARGP_ERR_UNKNOWN */
53
22
54
volatile sig_atomic_t quit_now = 0;
55
int signal_received;
23
volatile bool quit_now = false;
56
24
bool debug = false;
57
const char *argp_program_version = "password-prompt " VERSION;
58
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
59
25
60
static void termination_handler(int signum){
61
if(quit_now){
62
return;
63
}
64
quit_now = 1;
65
signal_received = signum;
26
void termination_handler(int signum){
27
quit_now = true;
66
28
}
67
29
68
30
int main(int argc, char **argv){
69
ssize_t ret;
31
ssize_t ret = -1;
70
32
size_t n;
71
33
struct termios t_new, t_old;
72
34
char *buffer = NULL;
73
char *prefix = NULL;
74
35
int status = EXIT_SUCCESS;
75
36
struct sigaction old_action,
76
37
new_action = { .sa_handler = termination_handler,
77
38
.sa_flags = 0 };
78
{
79
struct argp_option options[] = {
80
{ .name = "prefix", .key = 'p',
81
.arg = "PREFIX", .flags = 0,
82
.doc = "Prefix shown before the prompt", .group = 2 },
83
{ .name = "debug", .key = 128,
84
.doc = "Debug mode", .group = 3 },
85
{ .name = NULL }
86
};
87
88
error_t parse_opt (int key, char *arg, struct argp_state *state){
89
switch (key){
90
case 'p':
91
prefix = arg;
92
break;
93
case 128:
39
const char db[] = "--debug";
40
char *basename = rindex(argv[0], '/');
41
if(basename == NULL){
42
basename = argv[0];
43
} else {
44
basename++;
45
}
46
47
char *program_name = malloc(strlen(basename) + sizeof(db));
48
if (program_name == NULL){
49
perror("argv[0]");
50
return EXIT_FAILURE;
51
}
52
53
program_name[0] = '\0';
54
55
for (int i = 1; i < argc; i++){
56
if (not strncmp(argv[i], db, 5)){
57
strcat(strcat(strcat(program_name, db ), "="), basename);
58
if(not strcmp(argv[i], db) or not strcmp(argv[i], program_name)){
94
59
debug = true;
95
break;
96
case ARGP_KEY_ARG:
97
argp_usage(state);
98
break;
99
case ARGP_KEY_END:
100
break;
101
default:
102
return ARGP_ERR_UNKNOWN;
103
60
}
104
return 0;
105
}
106
107
struct argp argp = { .options = options, .parser = parse_opt,
108
.args_doc = "",
109
.doc = "Mandos password-prompt -- Read and"
110
" output a password" };
111
ret = argp_parse(&argp, argc, argv, 0, 0, NULL);
112
if(ret == ARGP_ERR_UNKNOWN){
113
fprintf(stderr, "Unknown error while parsing arguments\n");
114
return EXIT_FAILURE;
115
61
}
116
62
}
117
118
if(debug){
63
free(program_name);
64
65
if (debug){
119
66
fprintf(stderr, "Starting %s\n", argv[0]);
120
67
}
121
if(debug){
68
if (debug){
122
69
fprintf(stderr, "Storing current terminal attributes\n");
123
70
}
124
71
125
if(tcgetattr(STDIN_FILENO, &t_old) != 0){
126
perror("tcgetattr");
72
if (tcgetattr(STDIN_FILENO, &t_old) != 0){
127
73
return EXIT_FAILURE;
128
74
}
129
75
130
76
sigemptyset(&new_action.sa_mask);
131
ret = sigaddset(&new_action.sa_mask, SIGINT);
132
if(ret == -1){
133
perror("sigaddset");
134
return EXIT_FAILURE;
135
}
136
ret = sigaddset(&new_action.sa_mask, SIGHUP);
137
if(ret == -1){
138
perror("sigaddset");
139
return EXIT_FAILURE;
140
}
141
ret = sigaddset(&new_action.sa_mask, SIGTERM);
142
if(ret == -1){
143
perror("sigaddset");
144
return EXIT_FAILURE;
145
}
146
/* Need to check if the handler is SIG_IGN before handling:
147
| [[info:libc:Initial Signal Actions]] |
148
| [[info:libc:Basic Signal Handling]] |
149
*/
150
ret = sigaction(SIGINT, NULL, &old_action);
151
if(ret == -1){
152
perror("sigaction");
153
return EXIT_FAILURE;
154
}
155
if(old_action.sa_handler != SIG_IGN){
156
ret = sigaction(SIGINT, &new_action, NULL);
157
if(ret == -1){
158
perror("sigaction");
159
return EXIT_FAILURE;
160
}
161
}
162
ret = sigaction(SIGHUP, NULL, &old_action);
163
if(ret == -1){
164
perror("sigaction");
165
return EXIT_FAILURE;
166
}
167
if(old_action.sa_handler != SIG_IGN){
168
ret = sigaction(SIGHUP, &new_action, NULL);
169
if(ret == -1){
170
perror("sigaction");
171
return EXIT_FAILURE;
172
}
173
}
174
ret = sigaction(SIGTERM, NULL, &old_action);
175
if(ret == -1){
176
perror("sigaction");
177
return EXIT_FAILURE;
178
}
179
if(old_action.sa_handler != SIG_IGN){
180
ret = sigaction(SIGTERM, &new_action, NULL);
181
if(ret == -1){
182
perror("sigaction");
183
return EXIT_FAILURE;
184
}
185
}
186
187
188
if(debug){
77
sigaddset(&new_action.sa_mask, SIGINT);
78
sigaddset(&new_action.sa_mask, SIGQUIT);
79
sigaddset(&new_action.sa_mask, SIGHUP);
80
sigaddset(&new_action.sa_mask, SIGTERM);
81
sigaction(SIGINT, NULL, &old_action);
82
if (old_action.sa_handler != SIG_IGN)
83
sigaction(SIGINT, &new_action, NULL);
84
sigaction(SIGQUIT, NULL, &old_action);
85
if (old_action.sa_handler != SIG_IGN)
86
sigaction(SIGQUIT, &new_action, NULL);
87
sigaction(SIGHUP, NULL, &old_action);
88
if (old_action.sa_handler != SIG_IGN)
89
sigaction(SIGHUP, &new_action, NULL);
90
sigaction(SIGTERM, NULL, &old_action);
91
if (old_action.sa_handler != SIG_IGN)
92
sigaction(SIGTERM, &new_action, NULL);
93
94
95
if (debug){
189
96
fprintf(stderr, "Removing echo flag from terminal attributes\n");
190
97
}
191
98
192
99
t_new = t_old;
193
t_new.c_lflag &= ~(tcflag_t)ECHO;
194
if(tcsetattr(STDIN_FILENO, TCSAFLUSH, &t_new) != 0){
100
t_new.c_lflag &= ~ECHO;
101
if (tcsetattr(STDIN_FILENO, TCSAFLUSH, &t_new) != 0){
195
102
perror("tcsetattr-echo");
196
103
return EXIT_FAILURE;
197
104
}
198
105
199
if(debug){
106
if (debug){
200
107
fprintf(stderr, "Waiting for input from stdin \n");
201
108
}
202
109
while(true){
203
if(quit_now){
204
if(debug){
205
fprintf(stderr, "Interrupted by signal, exiting.\n");
206
}
110
if (quit_now){
207
111
status = EXIT_FAILURE;
208
112
break;
209
113
}
210
211
if(prefix){
212
fprintf(stderr, "%s ", prefix);
213
}
214
{
215
const char *cryptsource = getenv("cryptsource");
216
const char *crypttarget = getenv("crypttarget");
217
const char *const prompt
218
= "Enter passphrase to unlock the disk";
219
if(cryptsource == NULL){
220
if(crypttarget == NULL){
221
fprintf(stderr, "%s: ", prompt);
222
} else {
223
fprintf(stderr, "%s (%s): ", prompt, crypttarget);
224
}
225
} else {
226
if(crypttarget == NULL){
227
fprintf(stderr, "%s %s: ", prompt, cryptsource);
228
} else {
229
fprintf(stderr, "%s %s (%s): ", prompt, cryptsource,
230
crypttarget);
231
}
232
}
233
}
114
fprintf(stderr, "Password: ");
234
115
ret = getline(&buffer, &n, stdin);
235
if(ret > 0){
116
if (ret > 0){
117
fprintf(stdout, "%s", buffer);
236
118
status = EXIT_SUCCESS;
237
/* Make n = data size instead of allocated buffer size */
238
n = (size_t)ret;
239
/* Strip final newline */
240
if(n>0 and buffer[n-1] == '\n'){
241
buffer[n-1] = '\0'; /* not strictly necessary */
242
n--;
243
}
244
size_t written = 0;
245
while(written < n){
246
ret = write(STDOUT_FILENO, buffer + written, n - written);
247
if(ret < 0){
248
perror("write");
249
status = EXIT_FAILURE;
250
break;
251
}
252
written += (size_t)ret;
253
}
254
119
break;
255
120
}
256
if(ret < 0){
257
if(errno != EINTR and not feof(stdin)){
121
// ret == 0 makes no other sence than to retry to read from stdin
122
if (ret < 0){
123
if (errno != EINTR and not feof(stdin)){
258
124
perror("getline");
259
125
status = EXIT_FAILURE;
260
126
break;
261
127
}
262
128
}
263
/* if(ret == 0), then the only sensible thing to do is to retry to
264
read from stdin */
265
129
fputc('\n', stderr);
266
if(debug and not quit_now){
267
/* If quit_now is nonzero, we were interrupted by a signal, and
268
will print that later, so no need to show this too. */
269
fprintf(stderr, "getline() returned 0, retrying.\n");
270
}
271
130
}
272
273
free(buffer);
274
275
if(debug){
131
132
if (debug){
276
133
fprintf(stderr, "Restoring terminal attributes\n");
277
134
}
278
if(tcsetattr(STDIN_FILENO, TCSAFLUSH, &t_old) != 0){
135
if (tcsetattr(STDIN_FILENO, TCSAFLUSH, &t_old) != 0){
279
136
perror("tcsetattr+echo");
280
137
}
281
282
if(quit_now){
283
sigemptyset(&old_action.sa_mask);
284
old_action.sa_handler = SIG_DFL;
285
ret = sigaction(signal_received, &old_action, NULL);
286
if(ret == -1){
287
perror("sigaction");
288
}
289
raise(signal_received);
290
}
291
292
if(debug){
293
fprintf(stderr, "%s is exiting with status %d\n", argv[0],
294
status);
295
}
296
if(status == EXIT_SUCCESS){
297
fputc('\n', stderr);
138
139
if (debug){
140
fprintf(stderr, "%s is exiting\n", argv[0]);
298
141
}
299
142
300
143
return status;
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0