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 15.1.2
- compare with another revision
- download diff
- download tarball
- view history from revision 15.1.2
- Committer: Björn Påhlsson
- Date: 2008-07-20 23:34:51 UTC
- mto: This revision was merged to the branch mainline in revision 17.
- Revision ID: belorn@braxen-20080720233451-720put8qyxqvk2ld
Added debug options from passprompt as --debug and --debug=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 <https://www.fukt.bsnet.se/~belorn/> and
23
* <https://www.fukt.bsnet.se/~teddy/>.
24
*/
25
26
1
#define _GNU_SOURCE /* getline() */
27
2
#define _FORTIFY_SOURCE 2
28
3
#include <termios.h> /* struct termios, tcsetattr(),
29
4
TCSAFLUSH, tcgetattr(), ECHO */
30
5
#include <unistd.h> /* struct termios, tcsetattr(),
33
8
#include <signal.h> /* sig_atomic_t, raise(), struct
34
9
sigaction, sigemptyset(),
35
10
sigaction(), sigaddset(), SIGINT,
36
SIGQUIT, SIGHUP, SIGTERM,
37
raise() */
38
#include <stddef.h> /* NULL, size_t, ssize_t */
11
SIGQUIT, SIGHUP, SIGTERM */
12
#include <stddef.h> /* NULL, size_t */
39
13
#include <sys/types.h> /* ssize_t */
40
#include <stdlib.h> /* EXIT_SUCCESS, EXIT_FAILURE,
41
getopt_long, getenv() */
14
#include <stdlib.h> /* EXIT_SUCCESS, EXIT_FAILURE */
42
15
#include <stdio.h> /* fprintf(), stderr, getline(),
43
16
stdin, feof(), perror(), fputc(),
44
stdout, getopt_long */
17
stdout */
45
18
#include <errno.h> /* errno, EINVAL */
46
19
#include <iso646.h> /* or, not */
47
20
#include <stdbool.h> /* bool, false, true */
48
21
#include <string.h> /* strlen, rindex, strncmp, strcmp */
49
#include <argp.h> /* struct argp_option, struct
50
argp_state, struct argp,
51
argp_parse(), error_t,
52
ARGP_KEY_ARG, ARGP_KEY_END,
53
ARGP_ERR_UNKNOWN */
54
22
55
volatile sig_atomic_t quit_now = 0;
56
int signal_received;
23
volatile bool quit_now = false;
57
24
bool debug = false;
58
const char *argp_program_version = "password-prompt " VERSION;
59
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
60
25
61
static void termination_handler(int signum){
62
if(quit_now){
63
return;
64
}
65
quit_now = 1;
66
signal_received = signum;
26
void termination_handler(int signum){
27
quit_now = true;
67
28
}
68
29
69
30
int main(int argc, char **argv){
70
ssize_t ret;
31
ssize_t ret = -1;
71
32
size_t n;
72
33
struct termios t_new, t_old;
73
34
char *buffer = NULL;
74
char *prefix = NULL;
75
35
int status = EXIT_SUCCESS;
76
36
struct sigaction old_action,
77
37
new_action = { .sa_handler = termination_handler,
78
38
.sa_flags = 0 };
79
{
80
struct argp_option options[] = {
81
{ .name = "prefix", .key = 'p',
82
.arg = "PREFIX", .flags = 0,
83
.doc = "Prefix shown before the prompt", .group = 2 },
84
{ .name = "debug", .key = 128,
85
.doc = "Debug mode", .group = 3 },
86
{ .name = NULL }
87
};
88
89
error_t parse_opt (int key, char *arg, struct argp_state *state){
90
switch (key){
91
case 'p':
92
prefix = arg;
93
break;
94
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)){
95
59
debug = true;
96
break;
97
case ARGP_KEY_ARG:
98
argp_usage(state);
99
break;
100
case ARGP_KEY_END:
101
break;
102
default:
103
return ARGP_ERR_UNKNOWN;
104
60
}
105
return 0;
106
}
107
108
struct argp argp = { .options = options, .parser = parse_opt,
109
.args_doc = "",
110
.doc = "Mandos password-prompt -- Read and"
111
" output a password" };
112
ret = argp_parse(&argp, argc, argv, 0, 0, NULL);
113
if(ret == ARGP_ERR_UNKNOWN){
114
fprintf(stderr, "Unknown error while parsing arguments\n");
115
return EXIT_FAILURE;
116
61
}
117
62
}
118
119
if(debug){
63
free(program_name);
64
65
if (debug){
120
66
fprintf(stderr, "Starting %s\n", argv[0]);
121
67
}
122
if(debug){
68
if (debug){
123
69
fprintf(stderr, "Storing current terminal attributes\n");
124
70
}
125
71
126
if(tcgetattr(STDIN_FILENO, &t_old) != 0){
127
perror("tcgetattr");
72
if (tcgetattr(STDIN_FILENO, &t_old) != 0){
128
73
return EXIT_FAILURE;
129
74
}
130
75
131
76
sigemptyset(&new_action.sa_mask);
132
ret = sigaddset(&new_action.sa_mask, SIGINT);
133
if(ret == -1){
134
perror("sigaddset");
135
return EXIT_FAILURE;
136
}
137
ret = sigaddset(&new_action.sa_mask, SIGHUP);
138
if(ret == -1){
139
perror("sigaddset");
140
return EXIT_FAILURE;
141
}
142
ret = sigaddset(&new_action.sa_mask, SIGTERM);
143
if(ret == -1){
144
perror("sigaddset");
145
return EXIT_FAILURE;
146
}
147
/* Need to check if the handler is SIG_IGN before handling:
148
| [[info:libc:Initial Signal Actions]] |
149
| [[info:libc:Basic Signal Handling]] |
150
*/
151
ret = sigaction(SIGINT, NULL, &old_action);
152
if(ret == -1){
153
perror("sigaction");
154
return EXIT_FAILURE;
155
}
156
if(old_action.sa_handler != SIG_IGN){
157
ret = sigaction(SIGINT, &new_action, NULL);
158
if(ret == -1){
159
perror("sigaction");
160
return EXIT_FAILURE;
161
}
162
}
163
ret = sigaction(SIGHUP, NULL, &old_action);
164
if(ret == -1){
165
perror("sigaction");
166
return EXIT_FAILURE;
167
}
168
if(old_action.sa_handler != SIG_IGN){
169
ret = sigaction(SIGHUP, &new_action, NULL);
170
if(ret == -1){
171
perror("sigaction");
172
return EXIT_FAILURE;
173
}
174
}
175
ret = sigaction(SIGTERM, NULL, &old_action);
176
if(ret == -1){
177
perror("sigaction");
178
return EXIT_FAILURE;
179
}
180
if(old_action.sa_handler != SIG_IGN){
181
ret = sigaction(SIGTERM, &new_action, NULL);
182
if(ret == -1){
183
perror("sigaction");
184
return EXIT_FAILURE;
185
}
186
}
187
188
189
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){
190
96
fprintf(stderr, "Removing echo flag from terminal attributes\n");
191
97
}
192
98
193
99
t_new = t_old;
194
100
t_new.c_lflag &= ~ECHO;
195
if(tcsetattr(STDIN_FILENO, TCSAFLUSH, &t_new) != 0){
101
if (tcsetattr(STDIN_FILENO, TCSAFLUSH, &t_new) != 0){
196
102
perror("tcsetattr-echo");
197
103
return EXIT_FAILURE;
198
104
}
199
105
200
if(debug){
106
if (debug){
201
107
fprintf(stderr, "Waiting for input from stdin \n");
202
108
}
203
109
while(true){
204
if(quit_now){
205
if(debug){
206
fprintf(stderr, "Interrupted by signal, exiting.\n");
207
}
110
if (quit_now){
208
111
status = EXIT_FAILURE;
209
112
break;
210
113
}
211
212
if(prefix){
213
fprintf(stderr, "%s ", prefix);
214
}
215
{
216
const char *cryptsource = getenv("cryptsource");
217
const char *crypttarget = getenv("crypttarget");
218
const char *const prompt
219
= "Enter passphrase to unlock the disk";
220
if(cryptsource == NULL){
221
if(crypttarget == NULL){
222
fprintf(stderr, "%s: ", prompt);
223
} else {
224
fprintf(stderr, "%s (%s): ", prompt, crypttarget);
225
}
226
} else {
227
if(crypttarget == NULL){
228
fprintf(stderr, "%s %s: ", prompt, cryptsource);
229
} else {
230
fprintf(stderr, "%s %s (%s): ", prompt, cryptsource,
231
crypttarget);
232
}
233
}
234
}
114
fprintf(stderr, "Password: ");
235
115
ret = getline(&buffer, &n, stdin);
236
if(ret > 0){
116
if (ret > 0){
117
fprintf(stdout, "%s", buffer);
237
118
status = EXIT_SUCCESS;
238
/* Make n = data size instead of allocated buffer size */
239
n = (size_t)ret;
240
/* Strip final newline */
241
if(n>0 and buffer[n-1] == '\n'){
242
buffer[n-1] = '\0'; /* not strictly necessary */
243
n--;
244
}
245
size_t written = 0;
246
while(written < n){
247
ret = write(STDOUT_FILENO, buffer + written, n - written);
248
if(ret < 0){
249
perror("write");
250
status = EXIT_FAILURE;
251
break;
252
}
253
written += (size_t)ret;
254
}
255
119
break;
256
120
}
257
if(ret < 0){
258
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)){
259
124
perror("getline");
260
125
status = EXIT_FAILURE;
261
126
break;
262
127
}
263
128
}
264
/* if(ret == 0), then the only sensible thing to do is to retry to
265
read from stdin */
266
129
fputc('\n', stderr);
267
if(debug and not quit_now){
268
/* If quit_now is nonzero, we were interrupted by a signal, and
269
will print that later, so no need to show this too. */
270
fprintf(stderr, "getline() returned 0, retrying.\n");
271
}
272
130
}
273
274
free(buffer);
275
276
if(debug){
131
132
if (debug){
277
133
fprintf(stderr, "Restoring terminal attributes\n");
278
134
}
279
if(tcsetattr(STDIN_FILENO, TCSAFLUSH, &t_old) != 0){
135
if (tcsetattr(STDIN_FILENO, TCSAFLUSH, &t_old) != 0){
280
136
perror("tcsetattr+echo");
281
137
}
282
283
if(quit_now){
284
sigemptyset(&old_action.sa_mask);
285
old_action.sa_handler = SIG_DFL;
286
ret = sigaction(signal_received, &old_action, NULL);
287
if(ret == -1){
288
perror("sigaction");
289
}
290
raise(signal_received);
291
}
292
293
if(debug){
294
fprintf(stderr, "%s is exiting with status %d\n", argv[0],
295
status);
296
}
297
if(status == EXIT_SUCCESS){
298
fputc('\n', stderr);
138
139
if (debug){
140
fprintf(stderr, "%s is exiting\n", argv[0]);
299
141
}
300
142
301
143
return status;
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0