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 11
- compare with another revision
- download diff
- download tarball
- view history from revision 11
- Committer: Teddy Hogeborn
- Date: 2008-06-30 01:43:39 UTC
- Revision ID: teddy@fukt.bsnet.se-20080630014339-rsuztydpl2w5ml83
* server.py: Rewritten to use Zeroconf (mDNS/DNS-SD) in place of the
old broadcast-UDP-to-port-49001 method.
old broadcast-UDP-to-port-49001 method.
- files added:
- ca.pem
- files removed:
- COPYING
- plugins.d
- files renamed:
- clients.conf => mandos-clients.conf
- mandos => server.py
- files modified:
- Makefile
added
removed
plugins.d/password-prompt.c
1
/* -*- coding: utf-8 -*- */
2
/*
3
* Passprompt - Read a password from the terminal and print it
4
*
5
* Copyright © 2007-2008 Teddy Hogeborn & Björn Påhlsson
6
*
7
* This program is free software: you can redistribute it and/or
8
* modify it under the terms of the GNU General Public License as
9
* published by the Free Software Foundation, either version 3 of the
10
* License, or (at your option) any later version.
11
*
12
* This program is distributed in the hope that it will be useful, but
13
* WITHOUT ANY WARRANTY; without even the implied warranty of
14
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15
* General Public License for more details.
16
*
17
* You should have received a copy of the GNU General Public License
18
* along with this program. If not, see
19
* <http://www.gnu.org/licenses/>.
20
*
21
* Contact the authors at <https://www.fukt.bsnet.se/~belorn/> and
22
* <https://www.fukt.bsnet.se/~teddy/>.
23
*/
24
25
#define _GNU_SOURCE /* getline() */
26
27
#include <termios.h> /* struct termios, tcsetattr(),
28
TCSAFLUSH, tcgetattr(), ECHO */
29
#include <unistd.h> /* struct termios, tcsetattr(),
30
STDIN_FILENO, TCSAFLUSH,
31
tcgetattr(), ECHO */
32
#include <signal.h> /* sig_atomic_t, raise(), struct
33
sigaction, sigemptyset(),
34
sigaction(), sigaddset(), SIGINT,
35
SIGQUIT, SIGHUP, SIGTERM */
36
#include <stddef.h> /* NULL, size_t, ssize_t */
37
#include <sys/types.h> /* ssize_t */
38
#include <stdlib.h> /* EXIT_SUCCESS, EXIT_FAILURE,
39
getopt_long, getenv() */
40
#include <stdio.h> /* fprintf(), stderr, getline(),
41
stdin, feof(), perror(), fputc(),
42
stdout, getopt_long */
43
#include <errno.h> /* errno, EINVAL */
44
#include <iso646.h> /* or, not */
45
#include <stdbool.h> /* bool, false, true */
46
#include <string.h> /* strlen, rindex, strncmp, strcmp */
47
#include <argp.h> /* struct argp_option, struct
48
argp_state, struct argp,
49
argp_parse(), error_t,
50
ARGP_KEY_ARG, ARGP_KEY_END,
51
ARGP_ERR_UNKNOWN */
52
53
volatile bool quit_now = false;
54
bool debug = false;
55
const char *argp_program_version = "password-prompt 1.0";
56
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
57
58
static void termination_handler(__attribute__((unused))int signum){
59
quit_now = true;
60
}
61
62
int main(int argc, char **argv){
63
ssize_t ret;
64
size_t n;
65
struct termios t_new, t_old;
66
char *buffer = NULL;
67
char *prefix = NULL;
68
int status = EXIT_SUCCESS;
69
struct sigaction old_action,
70
new_action = { .sa_handler = termination_handler,
71
.sa_flags = 0 };
72
{
73
struct argp_option options[] = {
74
{ .name = "prefix", .key = 'p',
75
.arg = "PREFIX", .flags = 0,
76
.doc = "Prefix used before the passprompt", .group = 2 },
77
{ .name = "debug", .key = 128,
78
.doc = "Debug mode", .group = 3 },
79
{ .name = NULL }
80
};
81
82
error_t parse_opt (int key, char *arg, struct argp_state *state) {
83
/* Get the INPUT argument from `argp_parse', which we know is a
84
pointer to our plugin list pointer. */
85
switch (key) {
86
case 'p':
87
prefix = arg;
88
break;
89
case 128:
90
debug = true;
91
break;
92
case ARGP_KEY_ARG:
93
argp_usage (state);
94
break;
95
case ARGP_KEY_END:
96
break;
97
default:
98
return ARGP_ERR_UNKNOWN;
99
}
100
return 0;
101
}
102
103
struct argp argp = { .options = options, .parser = parse_opt,
104
.args_doc = "",
105
.doc = "Mandos Passprompt -- Provides a passprompt" };
106
ret = argp_parse (&argp, argc, argv, 0, 0, NULL);
107
if (ret == ARGP_ERR_UNKNOWN){
108
fprintf(stderr, "Unknown error while parsing arguments\n");
109
return EXIT_FAILURE;
110
}
111
}
112
113
if (debug){
114
fprintf(stderr, "Starting %s\n", argv[0]);
115
}
116
if (debug){
117
fprintf(stderr, "Storing current terminal attributes\n");
118
}
119
120
if (tcgetattr(STDIN_FILENO, &t_old) != 0){
121
return EXIT_FAILURE;
122
}
123
124
sigemptyset(&new_action.sa_mask);
125
sigaddset(&new_action.sa_mask, SIGINT);
126
sigaddset(&new_action.sa_mask, SIGHUP);
127
sigaddset(&new_action.sa_mask, SIGTERM);
128
ret = sigaction(SIGINT, NULL, &old_action);
129
if(ret == -1){
130
perror("sigaction");
131
return EXIT_FAILURE;
132
}
133
if (old_action.sa_handler != SIG_IGN){
134
ret = sigaction(SIGINT, &new_action, NULL);
135
if(ret == -1){
136
perror("sigaction");
137
return EXIT_FAILURE;
138
}
139
}
140
ret = sigaction(SIGHUP, NULL, &old_action);
141
if(ret == -1){
142
perror("sigaction");
143
return EXIT_FAILURE;
144
}
145
if (old_action.sa_handler != SIG_IGN){
146
ret = sigaction(SIGHUP, &new_action, NULL);
147
if(ret == -1){
148
perror("sigaction");
149
return EXIT_FAILURE;
150
}
151
}
152
ret = sigaction(SIGTERM, NULL, &old_action);
153
if(ret == -1){
154
perror("sigaction");
155
return EXIT_FAILURE;
156
}
157
if (old_action.sa_handler != SIG_IGN){
158
ret = sigaction(SIGTERM, &new_action, NULL);
159
if(ret == -1){
160
perror("sigaction");
161
return EXIT_FAILURE;
162
}
163
}
164
165
166
if (debug){
167
fprintf(stderr, "Removing echo flag from terminal attributes\n");
168
}
169
170
t_new = t_old;
171
t_new.c_lflag &= ~ECHO;
172
if (tcsetattr(STDIN_FILENO, TCSAFLUSH, &t_new) != 0){
173
perror("tcsetattr-echo");
174
return EXIT_FAILURE;
175
}
176
177
if (debug){
178
fprintf(stderr, "Waiting for input from stdin \n");
179
}
180
while(true){
181
if (quit_now){
182
status = EXIT_FAILURE;
183
break;
184
}
185
186
if(prefix){
187
fprintf(stderr, "%s ", prefix);
188
}
189
{
190
const char *cryptsource = getenv("cryptsource");
191
const char *crypttarget = getenv("crypttarget");
192
const char *const prompt
193
= "Enter passphrase to unlock the disk";
194
if(cryptsource == NULL){
195
if(crypttarget == NULL){
196
fprintf(stderr, "%s: ", prompt);
197
} else {
198
fprintf(stderr, "%s (%s): ", prompt, crypttarget);
199
}
200
} else {
201
if(crypttarget == NULL){
202
fprintf(stderr, "%s %s: ", prompt, cryptsource);
203
} else {
204
fprintf(stderr, "%s %s (%s): ", prompt, cryptsource,
205
crypttarget);
206
}
207
}
208
}
209
ret = getline(&buffer, &n, stdin);
210
if (ret > 0){
211
fprintf(stdout, "%s", buffer);
212
status = EXIT_SUCCESS;
213
break;
214
}
215
if (ret < 0){
216
if (errno != EINTR and not feof(stdin)){
217
perror("getline");
218
status = EXIT_FAILURE;
219
break;
220
}
221
}
222
/* if(ret == 0), then the only sensible thing to do is to retry to
223
read from stdin */
224
fputc('\n', stderr);
225
}
226
227
if (debug){
228
fprintf(stderr, "Restoring terminal attributes\n");
229
}
230
if (tcsetattr(STDIN_FILENO, TCSAFLUSH, &t_old) != 0){
231
perror("tcsetattr+echo");
232
}
233
234
if (debug){
235
fprintf(stderr, "%s is exiting\n", argv[0]);
236
}
237
238
return status;
239
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0