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- Committer: Teddy Hogeborn
- Date: 2008-09-26 19:47:21 UTC
- Revision ID: teddy@fukt.bsnet.se-20080926194721-r8pm2p876hcf9xay
* Makefile (PLUGINS): Added "plugins.d/askpass-fifo".
(install-client-nokey): - '' -
* debian/mandos-client.lintian-overrides: Added "plugins.d/askpass-fifo".
* plugins.d/askpass-fifo.c: New.
(install-client-nokey): - '' -
* debian/mandos-client.lintian-overrides: Added "plugins.d/askpass-fifo".
* plugins.d/askpass-fifo.c: New.
- files added:
- debian/mandos-client.config
- files removed:
- NEWS
- files modified:
- .bzrignore
added
removed
plugins.d/password-prompt.c
1
/* -*- coding: utf-8; mode: c; mode: orgtbl -*- */
1
/* -*- coding: utf-8 -*- */
2
2
/*
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* 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 © 2008 Teddy Hogeborn & Björn Påhlsson
7
6
*
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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
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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
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* <https://www.fukt.bsnet.se/~teddy/>.
23
23
*/
24
24
25
25
#define _GNU_SOURCE /* getline() */
32
32
#include <signal.h> /* sig_atomic_t, raise(), struct
33
33
sigaction, sigemptyset(),
34
34
sigaction(), sigaddset(), SIGINT,
35
SIGQUIT, SIGHUP, SIGTERM,
36
raise() */
35
SIGQUIT, SIGHUP, SIGTERM */
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36
#include <stddef.h> /* NULL, size_t, ssize_t */
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37
#include <sys/types.h> /* ssize_t */
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38
#include <stdlib.h> /* EXIT_SUCCESS, EXIT_FAILURE,
40
getenv() */
39
getopt_long, getenv() */
41
40
#include <stdio.h> /* fprintf(), stderr, getline(),
42
stdin, feof(), perror(), fputc()
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*/
44
#include <errno.h> /* errno, EBADF, ENOTTY, EINVAL,
45
EFAULT, EFBIG, EIO, ENOSPC, EINTR
46
*/
41
stdin, feof(), perror(), fputc(),
42
stdout, getopt_long */
43
#include <errno.h> /* errno, EINVAL */
47
44
#include <iso646.h> /* or, not */
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45
#include <stdbool.h> /* bool, false, true */
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#include <string.h> /* strlen, rindex */
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#include <string.h> /* strlen, rindex, strncmp, strcmp */
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#include <argp.h> /* struct argp_option, struct
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argp_state, struct argp,
52
49
argp_parse(), error_t,
53
50
ARGP_KEY_ARG, ARGP_KEY_END,
54
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ARGP_ERR_UNKNOWN */
55
#include <sysexits.h> /* EX_SOFTWARE, EX_OSERR,
56
EX_UNAVAILABLE, EX_IOERR, EX_OK */
57
52
58
volatile sig_atomic_t quit_now = 0;
59
int signal_received;
53
volatile bool quit_now = false;
60
54
bool debug = false;
61
const char *argp_program_version = "password-prompt " VERSION;
55
const char *argp_program_version = "password-prompt 1.0";
62
56
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
63
57
64
static void termination_handler(int signum){
65
if(quit_now){
66
return;
67
}
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quit_now = 1;
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signal_received = signum;
58
static void termination_handler(__attribute__((unused))int signum){
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quit_now = true;
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}
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61
72
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int main(int argc, char **argv){
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.doc = "Prefix shown before the prompt", .group = 2 },
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{ .name = "debug", .key = 128,
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.doc = "Debug mode", .group = 3 },
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/*
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* These reproduce what we would get without ARGP_NO_HELP
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*/
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{ .name = "help", .key = '?',
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.doc = "Give this help list", .group = -1 },
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{ .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 },
98
79
{ .name = NULL }
99
80
};
100
101
error_t parse_opt (int key, char *arg, struct argp_state *state){
102
errno = 0;
103
switch (key){
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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) {
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86
case 'p':
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prefix = arg;
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break;
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89
case 128:
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90
debug = true;
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91
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 */
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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);
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exit(argp_err_exit_status);
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case ARGP_KEY_ARG:
93
argp_usage (state);
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break;
95
case ARGP_KEY_END:
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96
break;
124
97
default:
125
98
return ARGP_ERR_UNKNOWN;
126
99
}
127
return errno;
100
return 0;
128
101
}
129
102
130
103
struct argp argp = { .options = options, .parser = parse_opt,
131
104
.args_doc = "",
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105
.doc = "Mandos password-prompt -- Read and"
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106
" output a password" };
134
ret = argp_parse(&argp, argc, argv,
135
ARGP_IN_ORDER | ARGP_NO_HELP, NULL, NULL);
136
switch(ret){
137
case 0:
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break;
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case ENOMEM:
140
default:
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errno = ret;
142
perror("argp_parse");
143
return EX_OSERR;
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case EINVAL:
145
return EX_USAGE;
107
ret = argp_parse (&argp, argc, argv, 0, 0, NULL);
108
if (ret == ARGP_ERR_UNKNOWN){
109
fprintf(stderr, "Unknown error while parsing arguments\n");
110
return EXIT_FAILURE;
146
111
}
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112
}
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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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}
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if(debug){
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if (debug){
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fprintf(stderr, "Storing current terminal attributes\n");
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}
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if(tcgetattr(STDIN_FILENO, &t_old) != 0){
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int e = errno;
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if (tcgetattr(STDIN_FILENO, &t_old) != 0){
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perror("tcgetattr");
159
switch(e){
160
case EBADF:
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case ENOTTY:
162
return EX_UNAVAILABLE;
163
default:
164
return EX_OSERR;
165
}
123
return EXIT_FAILURE;
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124
}
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125
168
126
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
}
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ret = sigaddset(&new_action.sa_mask, SIGHUP);
175
if(ret == -1){
176
perror("sigaddset");
177
return EX_OSERR;
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}
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ret = sigaddset(&new_action.sa_mask, SIGTERM);
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if(ret == -1){
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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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sigaddset(&new_action.sa_mask, SIGINT);
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sigaddset(&new_action.sa_mask, SIGHUP);
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sigaddset(&new_action.sa_mask, SIGTERM);
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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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return EXIT_FAILURE;
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}
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if(old_action.sa_handler != SIG_IGN){
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if (old_action.sa_handler != SIG_IGN){
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ret = sigaction(SIGINT, &new_action, NULL);
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if(ret == -1){
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perror("sigaction");
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return EX_OSERR;
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return EXIT_FAILURE;
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}
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}
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ret = sigaction(SIGHUP, 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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return EXIT_FAILURE;
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}
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if(old_action.sa_handler != SIG_IGN){
147
if (old_action.sa_handler != SIG_IGN){
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148
ret = sigaction(SIGHUP, &new_action, NULL);
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149
if(ret == -1){
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150
perror("sigaction");
209
return EX_OSERR;
151
return EXIT_FAILURE;
210
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}
211
153
}
212
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ret = sigaction(SIGTERM, NULL, &old_action);
213
155
if(ret == -1){
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156
perror("sigaction");
215
return EX_OSERR;
157
return EXIT_FAILURE;
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158
}
217
if(old_action.sa_handler != SIG_IGN){
159
if (old_action.sa_handler != SIG_IGN){
218
160
ret = sigaction(SIGTERM, &new_action, NULL);
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161
if(ret == -1){
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162
perror("sigaction");
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return EX_OSERR;
163
return EXIT_FAILURE;
222
164
}
223
165
}
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166
225
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if(debug){
168
if (debug){
227
169
fprintf(stderr, "Removing echo flag from terminal attributes\n");
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170
}
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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;
173
t_new.c_lflag &= ~ECHO;
174
if (tcsetattr(STDIN_FILENO, TCSAFLUSH, &t_new) != 0){
234
175
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
}
176
return EXIT_FAILURE;
243
177
}
244
245
if(debug){
178
179
if (debug){
246
180
fprintf(stderr, "Waiting for input from stdin \n");
247
181
}
248
182
while(true){
249
if(quit_now){
183
if (quit_now){
250
184
if(debug){
251
185
fprintf(stderr, "Interrupted by signal, exiting.\n");
252
186
}
258
192
fprintf(stderr, "%s ", prefix);
259
193
}
260
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{
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";
195
const char *cryptsource = getenv("cryptsource");
196
const char *crypttarget = getenv("crypttarget");
197
const char *const prompt
198
= "Enter passphrase to unlock the disk";
272
199
if(cryptsource == NULL){
273
200
if(crypttarget == NULL){
274
fprintf(stderr, "%s to unlock the disk: ", prompt2);
201
fprintf(stderr, "%s: ", prompt);
275
202
} else {
276
fprintf(stderr, "%s (%s)\n%s: ", prompt1, crypttarget,
277
prompt2);
203
fprintf(stderr, "%s (%s): ", prompt, crypttarget);
278
204
}
279
205
} else {
280
206
if(crypttarget == NULL){
281
fprintf(stderr, "%s %s\n%s: ", prompt1, cryptsource,
282
prompt2);
207
fprintf(stderr, "%s %s: ", prompt, cryptsource);
283
208
} else {
284
fprintf(stderr, "%s %s (%s)\n%s: ", prompt1, cryptsource,
285
crypttarget, prompt2);
209
fprintf(stderr, "%s %s (%s): ", prompt, cryptsource,
210
crypttarget);
286
211
}
287
212
}
288
213
}
289
214
ret = getline(&buffer, &n, stdin);
290
if(ret > 0){
215
if (ret > 0){
291
216
status = EXIT_SUCCESS;
292
217
/* Make n = data size instead of allocated buffer size */
293
218
n = (size_t)ret;
294
219
/* Strip final newline */
295
if(n > 0 and buffer[n-1] == '\n'){
220
if(n>0 and buffer[n-1] == '\n'){
296
221
buffer[n-1] = '\0'; /* not strictly necessary */
297
222
n--;
298
223
}
300
225
while(written < n){
301
226
ret = write(STDOUT_FILENO, buffer + written, n - written);
302
227
if(ret < 0){
303
int e = errno;
304
228
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
}
229
status = EXIT_FAILURE;
319
230
break;
320
231
}
321
232
written += (size_t)ret;
322
233
}
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
234
break;
338
235
}
339
if(ret < 0){
340
int e = errno;
341
if(errno != EINTR and not feof(stdin)){
236
if (ret < 0){
237
if (errno != EINTR and not feof(stdin)){
342
238
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
}
239
status = EXIT_FAILURE;
352
240
break;
353
241
}
354
242
}
356
244
read from stdin */
357
245
fputc('\n', stderr);
358
246
if(debug and not quit_now){
359
/* If quit_now is nonzero, we were interrupted by a signal, and
247
/* If quit_now is true, we were interrupted by a signal, and
360
248
will print that later, so no need to show this too. */
361
249
fprintf(stderr, "getline() returned 0, retrying.\n");
362
250
}
363
251
}
364
252
365
253
free(buffer);
366
254
367
if(debug){
255
if (debug){
368
256
fprintf(stderr, "Restoring terminal attributes\n");
369
257
}
370
if(tcsetattr(STDIN_FILENO, TCSAFLUSH, &t_old) != 0){
258
if (tcsetattr(STDIN_FILENO, TCSAFLUSH, &t_old) != 0){
371
259
perror("tcsetattr+echo");
372
260
}
373
261
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){
262
if (debug){
385
263
fprintf(stderr, "%s is exiting with status %d\n", argv[0],
386
264
status);
387
265
}
388
if(status == EXIT_SUCCESS or status == EX_OK){
266
if(status == EXIT_SUCCESS){
389
267
fputc('\n', stderr);
390
268
}
391
269
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Version: 2.0.2.dev0