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 24
- compare with another revision
- download diff
- download tarball
- view history from revision 24
- Committer: Teddy Hogeborn
- Date: 2008-07-22 01:59:47 UTC
- Revision ID: teddy@fukt.bsnet.se-20080722015947-y7o6keji020nvrhw
* Makefile (OPTIMIZE): New; optimize for size.
(CFLAGS): Use $(OPTIMIZE).
(CFLAGS): Use $(OPTIMIZE).
- 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 -*- */
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 and 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() */
26
#define _FORTIFY_SOURCE 2
26
27
27
28
#include <termios.h> /* struct termios, tcsetattr(),
28
29
TCSAFLUSH, tcgetattr(), ECHO */
32
33
#include <signal.h> /* sig_atomic_t, raise(), struct
33
34
sigaction, sigemptyset(),
34
35
sigaction(), sigaddset(), SIGINT,
35
SIGQUIT, SIGHUP, SIGTERM,
36
raise() */
37
#include <stddef.h> /* NULL, size_t, ssize_t */
36
SIGQUIT, SIGHUP, SIGTERM */
37
#include <stddef.h> /* NULL, size_t */
38
38
#include <sys/types.h> /* ssize_t */
39
39
#include <stdlib.h> /* EXIT_SUCCESS, EXIT_FAILURE,
40
getopt_long, getenv() */
40
getopt_long */
41
41
#include <stdio.h> /* fprintf(), stderr, getline(),
42
42
stdin, feof(), perror(), fputc(),
43
43
stdout, getopt_long */
45
45
#include <iso646.h> /* or, not */
46
46
#include <stdbool.h> /* bool, false, true */
47
47
#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 */
48
#include <getopt.h> /* getopt_long */
53
49
54
volatile sig_atomic_t quit_now = 0;
55
int signal_received;
50
volatile bool quit_now = false;
56
51
bool debug = false;
57
const char *argp_program_version = "password-prompt " VERSION;
58
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
59
52
60
static void termination_handler(int signum){
61
if(quit_now){
62
return;
63
}
64
quit_now = 1;
65
signal_received = signum;
53
void termination_handler(__attribute__((unused))int signum){
54
quit_now = true;
66
55
}
67
56
68
57
int main(int argc, char **argv){
75
64
struct sigaction old_action,
76
65
new_action = { .sa_handler = termination_handler,
77
66
.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:
94
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
}
104
return 0;
67
68
while (true){
69
static struct option long_options[] = {
70
{"debug", no_argument, (int *)&debug, 1},
71
{"prefix", required_argument, 0, 'p'},
72
{0, 0, 0, 0} };
73
74
int option_index = 0;
75
ret = getopt_long (argc, argv, "p:", long_options, &option_index);
76
77
if (ret == -1){
78
break;
105
79
}
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;
80
81
switch(ret){
82
case 0:
83
break;
84
case 'p':
85
prefix = optarg;
86
break;
87
default:
88
fprintf(stderr, "bad arguments\n");
89
exit(EXIT_FAILURE);
115
90
}
116
91
}
117
118
if(debug){
92
93
if (debug){
119
94
fprintf(stderr, "Starting %s\n", argv[0]);
120
95
}
121
if(debug){
96
if (debug){
122
97
fprintf(stderr, "Storing current terminal attributes\n");
123
98
}
124
99
125
if(tcgetattr(STDIN_FILENO, &t_old) != 0){
126
perror("tcgetattr");
100
if (tcgetattr(STDIN_FILENO, &t_old) != 0){
127
101
return EXIT_FAILURE;
128
102
}
129
103
130
104
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){
105
sigaddset(&new_action.sa_mask, SIGINT);
106
sigaddset(&new_action.sa_mask, SIGQUIT);
107
sigaddset(&new_action.sa_mask, SIGHUP);
108
sigaddset(&new_action.sa_mask, SIGTERM);
109
sigaction(SIGINT, NULL, &old_action);
110
if (old_action.sa_handler != SIG_IGN)
111
sigaction(SIGINT, &new_action, NULL);
112
sigaction(SIGQUIT, NULL, &old_action);
113
if (old_action.sa_handler != SIG_IGN)
114
sigaction(SIGQUIT, &new_action, NULL);
115
sigaction(SIGHUP, NULL, &old_action);
116
if (old_action.sa_handler != SIG_IGN)
117
sigaction(SIGHUP, &new_action, NULL);
118
sigaction(SIGTERM, NULL, &old_action);
119
if (old_action.sa_handler != SIG_IGN)
120
sigaction(SIGTERM, &new_action, NULL);
121
122
123
if (debug){
189
124
fprintf(stderr, "Removing echo flag from terminal attributes\n");
190
125
}
191
126
192
127
t_new = t_old;
193
128
t_new.c_lflag &= ~ECHO;
194
if(tcsetattr(STDIN_FILENO, TCSAFLUSH, &t_new) != 0){
129
if (tcsetattr(STDIN_FILENO, TCSAFLUSH, &t_new) != 0){
195
130
perror("tcsetattr-echo");
196
131
return EXIT_FAILURE;
197
132
}
198
133
199
if(debug){
134
if (debug){
200
135
fprintf(stderr, "Waiting for input from stdin \n");
201
136
}
202
137
while(true){
203
if(quit_now){
204
if(debug){
205
fprintf(stderr, "Interrupted by signal, exiting.\n");
206
}
138
if (quit_now){
207
139
status = EXIT_FAILURE;
208
140
break;
209
141
}
210
142
211
143
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
}
144
fprintf(stderr, "%s Password: ", prefix);
145
} else {
146
fprintf(stderr, "Password: ");
147
}
234
148
ret = getline(&buffer, &n, stdin);
235
if(ret > 0){
149
if (ret > 0){
150
fprintf(stdout, "%s", buffer);
236
151
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
152
break;
255
153
}
256
if(ret < 0){
257
if(errno != EINTR and not feof(stdin)){
154
// ret == 0 makes no other sence than to retry to read from stdin
155
if (ret < 0){
156
if (errno != EINTR and not feof(stdin)){
258
157
perror("getline");
259
158
status = EXIT_FAILURE;
260
159
break;
261
160
}
262
161
}
263
/* if(ret == 0), then the only sensible thing to do is to retry to
264
read from stdin */
265
162
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
163
}
272
273
free(buffer);
274
275
if(debug){
164
165
if (debug){
276
166
fprintf(stderr, "Restoring terminal attributes\n");
277
167
}
278
if(tcsetattr(STDIN_FILENO, TCSAFLUSH, &t_old) != 0){
168
if (tcsetattr(STDIN_FILENO, TCSAFLUSH, &t_old) != 0){
279
169
perror("tcsetattr+echo");
280
170
}
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);
171
172
if (debug){
173
fprintf(stderr, "%s is exiting\n", argv[0]);
298
174
}
299
175
300
176
return status;
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0