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- Committer: Teddy Hogeborn
- Date: 2008-07-22 06:23:59 UTC
- mfrom: (24.1.1 mandos)
- Revision ID: teddy@fukt.bsnet.se-20080722062359-qti3ecst69bq3ltk
Merge.
- 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
*
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* 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
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* along with this program. If not, see
20
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* <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 */
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39
#include <stdlib.h> /* EXIT_SUCCESS, EXIT_FAILURE,
40
getenv() */
40
getopt_long */
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#include <stdio.h> /* fprintf(), stderr, getline(),
42
stdin, feof(), perror(), fputc()
43
*/
44
#include <errno.h> /* errno, EBADF, ENOTTY, EINVAL,
45
EFAULT, EFBIG, EIO, ENOSPC, EINTR
46
*/
42
stdin, feof(), perror(), fputc(),
43
stdout, getopt_long */
44
#include <errno.h> /* errno, EINVAL */
47
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#include <iso646.h> /* or, not */
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#include <stdbool.h> /* bool, false, true */
49
#include <string.h> /* strlen, rindex */
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#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 */
47
#include <string.h> /* strlen, rindex, strncmp, strcmp */
48
#include <getopt.h> /* getopt_long */
57
49
58
volatile sig_atomic_t quit_now = 0;
59
int signal_received;
50
volatile bool quit_now = false;
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51
bool debug = false;
61
const char *argp_program_version = "password-prompt " VERSION;
62
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
63
52
64
static void termination_handler(int signum){
65
if(quit_now){
66
return;
67
}
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quit_now = 1;
69
signal_received = signum;
53
void termination_handler(__attribute__((unused))int signum){
54
quit_now = true;
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55
}
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72
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int main(int argc, char **argv){
79
64
struct sigaction old_action,
80
65
new_action = { .sa_handler = termination_handler,
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66
.sa_flags = 0 };
82
{
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struct argp_option options[] = {
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{ .name = "prefix", .key = 'p',
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.arg = "PREFIX", .flags = 0,
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.doc = "Prefix shown before the prompt", .group = 2 },
87
{ .name = "debug", .key = 128,
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.doc = "Debug mode", .group = 3 },
89
/*
90
* These reproduce what we would get without ARGP_NO_HELP
91
*/
92
{ .name = "help", .key = '?',
93
.doc = "Give this help list", .group = -1 },
94
{ .name = "usage", .key = -3,
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.doc = "Give a short usage message", .group = -1 },
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{ .name = "version", .key = 'V',
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.doc = "Print program version", .group = -1 },
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{ .name = NULL }
99
};
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error_t parse_opt (int key, char *arg, struct argp_state *state){
102
errno = 0;
103
switch (key){
104
case 'p':
105
prefix = arg;
106
break;
107
case 128:
108
debug = true;
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break;
110
/*
111
* These reproduce what we would get without ARGP_NO_HELP
112
*/
113
case '?': /* --help */
114
argp_state_help(state, state->out_stream,
115
(ARGP_HELP_STD_HELP | ARGP_HELP_EXIT_ERR)
116
& ~(unsigned int)ARGP_HELP_EXIT_OK);
117
case -3: /* --usage */
118
argp_state_help(state, state->out_stream,
119
ARGP_HELP_USAGE | ARGP_HELP_EXIT_ERR);
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case 'V': /* --version */
121
fprintf(state->out_stream, "%s\n", argp_program_version);
122
exit(argp_err_exit_status);
123
break;
124
default:
125
return ARGP_ERR_UNKNOWN;
126
}
127
return errno;
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
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if (ret == -1){
78
break;
128
79
}
129
130
struct argp argp = { .options = options, .parser = parse_opt,
131
.args_doc = "",
132
.doc = "Mandos password-prompt -- Read and"
133
" output a password" };
134
ret = argp_parse(&argp, argc, argv,
135
ARGP_IN_ORDER | ARGP_NO_HELP, NULL, NULL);
80
136
81
switch(ret){
137
82
case 0:
138
83
break;
139
case ENOMEM:
84
case 'p':
85
prefix = optarg;
86
break;
140
87
default:
141
errno = ret;
142
perror("argp_parse");
143
return EX_OSERR;
144
case EINVAL:
145
return EX_USAGE;
88
fprintf(stderr, "bad arguments\n");
89
exit(EXIT_FAILURE);
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90
}
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91
}
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if(debug){
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if (debug){
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fprintf(stderr, "Starting %s\n", argv[0]);
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95
}
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if(debug){
96
if (debug){
153
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fprintf(stderr, "Storing current terminal attributes\n");
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98
}
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156
if(tcgetattr(STDIN_FILENO, &t_old) != 0){
157
int e = errno;
158
perror("tcgetattr");
159
switch(e){
160
case EBADF:
161
case ENOTTY:
162
return EX_UNAVAILABLE;
163
default:
164
return EX_OSERR;
165
}
100
if (tcgetattr(STDIN_FILENO, &t_old) != 0){
101
return EXIT_FAILURE;
166
102
}
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168
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sigemptyset(&new_action.sa_mask);
169
ret = sigaddset(&new_action.sa_mask, SIGINT);
170
if(ret == -1){
171
perror("sigaddset");
172
return EX_OSERR;
173
}
174
ret = sigaddset(&new_action.sa_mask, SIGHUP);
175
if(ret == -1){
176
perror("sigaddset");
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return EX_OSERR;
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}
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ret = sigaddset(&new_action.sa_mask, SIGTERM);
180
if(ret == -1){
181
perror("sigaddset");
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return EX_OSERR;
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}
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/* Need to check if the handler is SIG_IGN before handling:
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| [[info:libc:Initial Signal Actions]] |
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| [[info:libc:Basic Signal Handling]] |
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*/
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ret = sigaction(SIGINT, NULL, &old_action);
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if(ret == -1){
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perror("sigaction");
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return EX_OSERR;
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}
193
if(old_action.sa_handler != SIG_IGN){
194
ret = sigaction(SIGINT, &new_action, NULL);
195
if(ret == -1){
196
perror("sigaction");
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return EX_OSERR;
198
}
199
}
200
ret = sigaction(SIGHUP, NULL, &old_action);
201
if(ret == -1){
202
perror("sigaction");
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return EX_OSERR;
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}
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if(old_action.sa_handler != SIG_IGN){
206
ret = sigaction(SIGHUP, &new_action, NULL);
207
if(ret == -1){
208
perror("sigaction");
209
return EX_OSERR;
210
}
211
}
212
ret = sigaction(SIGTERM, NULL, &old_action);
213
if(ret == -1){
214
perror("sigaction");
215
return EX_OSERR;
216
}
217
if(old_action.sa_handler != SIG_IGN){
218
ret = sigaction(SIGTERM, &new_action, NULL);
219
if(ret == -1){
220
perror("sigaction");
221
return EX_OSERR;
222
}
223
}
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if(debug){
105
sigaddset(&new_action.sa_mask, SIGINT);
106
sigaddset(&new_action.sa_mask, SIGQUIT);
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sigaddset(&new_action.sa_mask, SIGHUP);
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sigaddset(&new_action.sa_mask, SIGTERM);
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sigaction(SIGINT, NULL, &old_action);
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if (old_action.sa_handler != SIG_IGN)
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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){
227
124
fprintf(stderr, "Removing echo flag from terminal attributes\n");
228
125
}
229
126
230
127
t_new = t_old;
231
t_new.c_lflag &= ~(tcflag_t)ECHO;
232
if(tcsetattr(STDIN_FILENO, TCSAFLUSH, &t_new) != 0){
233
int e = errno;
128
t_new.c_lflag &= ~ECHO;
129
if (tcsetattr(STDIN_FILENO, TCSAFLUSH, &t_new) != 0){
234
130
perror("tcsetattr-echo");
235
switch(e){
236
case EBADF:
237
case ENOTTY:
238
return EX_UNAVAILABLE;
239
case EINVAL:
240
default:
241
return EX_OSERR;
242
}
131
return EXIT_FAILURE;
243
132
}
244
245
if(debug){
133
134
if (debug){
246
135
fprintf(stderr, "Waiting for input from stdin \n");
247
136
}
248
137
while(true){
249
if(quit_now){
250
if(debug){
251
fprintf(stderr, "Interrupted by signal, exiting.\n");
252
}
138
if (quit_now){
253
139
status = EXIT_FAILURE;
254
140
break;
255
141
}
256
142
257
143
if(prefix){
258
fprintf(stderr, "%s ", prefix);
259
}
260
{
261
const char *cryptsource = getenv("CRYPTTAB_SOURCE");
262
const char *crypttarget = getenv("CRYPTTAB_NAME");
263
/* Before cryptsetup 1.1.0~rc2 */
264
if(cryptsource == NULL){
265
cryptsource = getenv("cryptsource");
266
}
267
if(crypttarget == NULL){
268
crypttarget = getenv("crypttarget");
269
}
270
const char *const prompt1 = "Unlocking the disk";
271
const char *const prompt2 = "Enter passphrase";
272
if(cryptsource == NULL){
273
if(crypttarget == NULL){
274
fprintf(stderr, "%s to unlock the disk: ", prompt2);
275
} else {
276
fprintf(stderr, "%s (%s)\n%s: ", prompt1, crypttarget,
277
prompt2);
278
}
279
} else {
280
if(crypttarget == NULL){
281
fprintf(stderr, "%s %s\n%s: ", prompt1, cryptsource,
282
prompt2);
283
} else {
284
fprintf(stderr, "%s %s (%s)\n%s: ", prompt1, cryptsource,
285
crypttarget, prompt2);
286
}
287
}
288
}
144
fprintf(stderr, "%s Password: ", prefix);
145
} else {
146
fprintf(stderr, "Password: ");
147
}
289
148
ret = getline(&buffer, &n, stdin);
290
if(ret > 0){
149
if (ret > 0){
150
fprintf(stdout, "%s", buffer);
291
151
status = EXIT_SUCCESS;
292
/* Make n = data size instead of allocated buffer size */
293
n = (size_t)ret;
294
/* Strip final newline */
295
if(n > 0 and buffer[n-1] == '\n'){
296
buffer[n-1] = '\0'; /* not strictly necessary */
297
n--;
298
}
299
size_t written = 0;
300
while(written < n){
301
ret = write(STDOUT_FILENO, buffer + written, n - written);
302
if(ret < 0){
303
int e = errno;
304
perror("write");
305
switch(e){
306
case EBADF:
307
case EFAULT:
308
case EINVAL:
309
case EFBIG:
310
case EIO:
311
case ENOSPC:
312
default:
313
status = EX_IOERR;
314
break;
315
case EINTR:
316
status = EXIT_FAILURE;
317
break;
318
}
319
break;
320
}
321
written += (size_t)ret;
322
}
323
ret = close(STDOUT_FILENO);
324
if(ret == -1){
325
int e = errno;
326
perror("close");
327
switch(e){
328
case EBADF:
329
status = EX_OSFILE;
330
break;
331
case EIO:
332
default:
333
status = EX_IOERR;
334
break;
335
}
336
}
337
152
break;
338
153
}
339
if(ret < 0){
340
int e = errno;
341
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)){
342
157
perror("getline");
343
switch(e){
344
case EBADF:
345
status = EX_UNAVAILABLE;
346
case EIO:
347
case EINVAL:
348
default:
349
status = EX_IOERR;
350
break;
351
}
158
status = EXIT_FAILURE;
352
159
break;
353
160
}
354
161
}
355
/* if(ret == 0), then the only sensible thing to do is to retry to
356
read from stdin */
357
162
fputc('\n', stderr);
358
if(debug and not quit_now){
359
/* If quit_now is nonzero, we were interrupted by a signal, and
360
will print that later, so no need to show this too. */
361
fprintf(stderr, "getline() returned 0, retrying.\n");
362
}
363
163
}
364
365
free(buffer);
366
367
if(debug){
164
165
if (debug){
368
166
fprintf(stderr, "Restoring terminal attributes\n");
369
167
}
370
if(tcsetattr(STDIN_FILENO, TCSAFLUSH, &t_old) != 0){
168
if (tcsetattr(STDIN_FILENO, TCSAFLUSH, &t_old) != 0){
371
169
perror("tcsetattr+echo");
372
170
}
373
374
if(quit_now){
375
sigemptyset(&old_action.sa_mask);
376
old_action.sa_handler = SIG_DFL;
377
ret = sigaction(signal_received, &old_action, NULL);
378
if(ret == -1){
379
perror("sigaction");
380
}
381
raise(signal_received);
382
}
383
384
if(debug){
385
fprintf(stderr, "%s is exiting with status %d\n", argv[0],
386
status);
387
}
388
if(status == EXIT_SUCCESS or status == EX_OK){
389
fputc('\n', stderr);
171
172
if (debug){
173
fprintf(stderr, "%s is exiting\n", argv[0]);
390
174
}
391
175
392
176
return status;
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