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- Committer: Teddy Hogeborn
- Date: 2008-07-21 02:33:00 UTC
- Revision ID: teddy@fukt.bsnet.se-20080721023300-c4t0cq7sxit973py
* plugins.d/Makefile: Removed
* plugins.d/mandosclient.c (start_mandos_communcation): Bug fix: write
server IP
address to
"to" struct.
* plugins.d/mandosclient.c (start_mandos_communcation): Bug fix: write
server IP
address to
"to" struct.
- 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
getopt_long */
44
#include <errno.h> /* errno, EBADF, ENOTTY, EINVAL,
45
EFAULT, EFBIG, EIO, ENOSPC, EINTR
46
*/
17
stdout */
18
#include <errno.h> /* errno, EINVAL */
47
19
#include <iso646.h> /* or, not */
48
20
#include <stdbool.h> /* bool, false, true */
49
21
#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 */
57
22
58
volatile sig_atomic_t quit_now = 0;
59
int signal_received;
23
volatile bool quit_now = false;
60
24
bool debug = false;
61
const char *argp_program_version = "password-prompt " VERSION;
62
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
63
25
64
static void termination_handler(int signum){
65
if(quit_now){
66
return;
67
}
68
quit_now = 1;
69
signal_received = signum;
26
void termination_handler(int signum){
27
quit_now = true;
70
28
}
71
29
72
30
int main(int argc, char **argv){
73
ssize_t ret;
31
ssize_t ret = -1;
74
32
size_t n;
75
33
struct termios t_new, t_old;
76
34
char *buffer = NULL;
77
char *prefix = NULL;
78
35
int status = EXIT_SUCCESS;
79
36
struct sigaction old_action,
80
37
new_action = { .sa_handler = termination_handler,
81
38
.sa_flags = 0 };
82
{
83
struct argp_option options[] = {
84
{ .name = "prefix", .key = 'p',
85
.arg = "PREFIX", .flags = 0,
86
.doc = "Prefix shown before the prompt", .group = 2 },
87
{ .name = "debug", .key = 128,
88
.doc = "Debug mode", .group = 3 },
89
{ .name = NULL }
90
};
91
92
error_t parse_opt (int key, char *arg, struct argp_state *state){
93
switch (key){
94
case 'p':
95
prefix = arg;
96
break;
97
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)){
98
59
debug = true;
99
break;
100
case ARGP_KEY_ARG:
101
argp_usage(state);
102
break;
103
case ARGP_KEY_END:
104
break;
105
default:
106
return ARGP_ERR_UNKNOWN;
107
60
}
108
return 0;
109
}
110
111
struct argp argp = { .options = options, .parser = parse_opt,
112
.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
61
}
120
62
}
121
122
if(debug){
63
free(program_name);
64
65
if (debug){
123
66
fprintf(stderr, "Starting %s\n", argv[0]);
124
67
}
125
if(debug){
68
if (debug){
126
69
fprintf(stderr, "Storing current terminal attributes\n");
127
70
}
128
71
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
}
72
if (tcgetattr(STDIN_FILENO, &t_old) != 0){
73
return EXIT_FAILURE;
139
74
}
140
75
141
76
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){
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){
200
96
fprintf(stderr, "Removing echo flag from terminal attributes\n");
201
97
}
202
98
203
99
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;
100
t_new.c_lflag &= ~ECHO;
101
if (tcsetattr(STDIN_FILENO, TCSAFLUSH, &t_new) != 0){
207
102
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
}
103
return EXIT_FAILURE;
216
104
}
217
218
if(debug){
105
106
if (debug){
219
107
fprintf(stderr, "Waiting for input from stdin \n");
220
108
}
221
109
while(true){
222
if(quit_now){
223
if(debug){
224
fprintf(stderr, "Interrupted by signal, exiting.\n");
225
}
110
if (quit_now){
226
111
status = EXIT_FAILURE;
227
112
break;
228
113
}
229
230
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
}
114
fprintf(stderr, "Password: ");
253
115
ret = getline(&buffer, &n, stdin);
254
if(ret > 0){
116
if (ret > 0){
117
fprintf(stdout, "%s", buffer);
255
118
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
119
break;
302
120
}
303
if(ret < 0){
304
int e = errno;
305
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)){
306
124
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
}
125
status = EXIT_FAILURE;
316
126
break;
317
127
}
318
128
}
319
/* if(ret == 0), then the only sensible thing to do is to retry to
320
read from stdin */
321
129
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
130
}
328
329
free(buffer);
330
331
if(debug){
131
132
if (debug){
332
133
fprintf(stderr, "Restoring terminal attributes\n");
333
134
}
334
if(tcsetattr(STDIN_FILENO, TCSAFLUSH, &t_old) != 0){
135
if (tcsetattr(STDIN_FILENO, TCSAFLUSH, &t_old) != 0){
335
136
perror("tcsetattr+echo");
336
137
}
337
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);
138
139
if (debug){
140
fprintf(stderr, "%s is exiting\n", argv[0]);
354
141
}
355
142
356
143
return status;
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