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- Committer: Björn Påhlsson
- Date: 2010-09-07 16:48:58 UTC
- mto: (237.7.1 mandos)
- mto: This revision was merged to the branch mainline in revision 270.
- Revision ID: belorn@fukt.bsnet.se-20100907164858-tcg8hkxdj41zizac
mandos server: Added debuglevel that adjust at what level information
should be reported.
plugin-runner, askpass-fifo, password-prompt, splasy, usplash:
Using error instead of perror
should be reported.
plugin-runner, askpass-fifo, password-prompt, splasy, usplash:
Using error instead of perror
- files added:
- dbus-mandos.conf
- files modified:
- INSTALL
added
removed
plugins.d/password-prompt.c
1
/* -*- coding: utf-8 -*- */
1
/* -*- coding: utf-8; mode: c; mode: orgtbl -*- */
2
2
/*
3
* Passprompt - Read a password from the terminal and print it
3
* Password-prompt - Read a password from the terminal and print it
4
4
*
5
5
* Copyright © 2008,2009 Teddy Hogeborn
6
6
* Copyright © 2008,2009 Björn Påhlsson
19
19
* along with this program. If not, see
20
20
* <http://www.gnu.org/licenses/>.
21
21
*
22
* Contact the authors at <https://www.fukt.bsnet.se/~belorn/> and
23
* <https://www.fukt.bsnet.se/~teddy/>.
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* Contact the authors at <mandos@fukt.bsnet.se>.
24
23
*/
25
24
26
25
#define _GNU_SOURCE /* getline() */
33
32
#include <signal.h> /* sig_atomic_t, raise(), struct
34
33
sigaction, sigemptyset(),
35
34
sigaction(), sigaddset(), SIGINT,
36
SIGQUIT, SIGHUP, SIGTERM */
35
SIGQUIT, SIGHUP, SIGTERM,
36
raise() */
37
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#include <stddef.h> /* NULL, size_t, ssize_t */
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#include <sys/types.h> /* ssize_t */
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#include <stdlib.h> /* EXIT_SUCCESS, EXIT_FAILURE,
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getopt_long, getenv() */
40
getenv() */
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#include <stdio.h> /* fprintf(), stderr, getline(),
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stdin, feof(), perror(), fputc(),
43
stdout, getopt_long */
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#include <errno.h> /* errno, EINVAL */
42
stdin, feof(), fputc()
43
*/
44
#include <errno.h> /* errno, EBADF, ENOTTY, EINVAL,
45
EFAULT, EFBIG, EIO, ENOSPC, EINTR
46
*/
47
#include <error.h> /* error() */
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48
#include <iso646.h> /* or, not */
46
49
#include <stdbool.h> /* bool, false, true */
47
#include <string.h> /* strlen, rindex, strncmp, strcmp */
50
#include <string.h> /* strlen, rindex */
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51
#include <argp.h> /* struct argp_option, struct
49
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argp_state, struct argp,
50
53
argp_parse(), error_t,
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ARGP_KEY_ARG, ARGP_KEY_END,
52
55
ARGP_ERR_UNKNOWN */
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#include <sysexits.h> /* EX_SOFTWARE, EX_OSERR,
57
EX_UNAVAILABLE, EX_IOERR, EX_OK */
53
58
54
volatile bool quit_now = false;
59
volatile sig_atomic_t quit_now = 0;
60
int signal_received;
55
61
bool debug = false;
56
62
const char *argp_program_version = "password-prompt " VERSION;
57
63
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
58
64
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static void termination_handler(__attribute__((unused))int signum){
60
quit_now = true;
65
static void termination_handler(int signum){
66
if(quit_now){
67
return;
68
}
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quit_now = 1;
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signal_received = signum;
61
71
}
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72
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int main(int argc, char **argv){
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ssize_t ret;
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ssize_t sret;
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int ret;
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size_t n;
66
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struct termios t_new, t_old;
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char *buffer = NULL;
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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
93
*/
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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 },
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{ .name = NULL }
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};
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error_t parse_opt (int key, char *arg, struct argp_state *state) {
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/* Get the INPUT argument from `argp_parse', which we know is a
85
pointer to our plugin list pointer. */
86
switch (key) {
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error_t parse_opt (int key, char *arg, struct argp_state *state){
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errno = 0;
105
switch (key){
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case 'p':
88
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prefix = arg;
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break;
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case 128:
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110
debug = true;
92
111
break;
93
case ARGP_KEY_ARG:
94
argp_usage (state);
95
break;
96
case ARGP_KEY_END:
112
/*
113
* These reproduce what we would get without ARGP_NO_HELP
114
*/
115
case '?': /* --help */
116
argp_state_help(state, state->out_stream,
117
(ARGP_HELP_STD_HELP | ARGP_HELP_EXIT_ERR)
118
& ~(unsigned int)ARGP_HELP_EXIT_OK);
119
case -3: /* --usage */
120
argp_state_help(state, state->out_stream,
121
ARGP_HELP_USAGE | ARGP_HELP_EXIT_ERR);
122
case 'V': /* --version */
123
fprintf(state->out_stream, "%s\n", argp_program_version);
124
exit(argp_err_exit_status);
97
125
break;
98
126
default:
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127
return ARGP_ERR_UNKNOWN;
100
128
}
101
return 0;
129
return errno;
102
130
}
103
131
104
132
struct argp argp = { .options = options, .parser = parse_opt,
105
133
.args_doc = "",
106
134
.doc = "Mandos password-prompt -- Read and"
107
135
" output a password" };
108
ret = argp_parse (&argp, argc, argv, 0, 0, NULL);
109
if (ret == ARGP_ERR_UNKNOWN){
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fprintf(stderr, "Unknown error while parsing arguments\n");
111
return EXIT_FAILURE;
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ret = argp_parse(&argp, argc, argv,
137
ARGP_IN_ORDER | ARGP_NO_HELP, NULL, NULL);
138
switch(ret){
139
case 0:
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break;
141
case ENOMEM:
142
default:
143
errno = ret;
144
error(0, errno, "argp_parse");
145
return EX_OSERR;
146
case EINVAL:
147
return EX_USAGE;
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148
}
113
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}
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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){
154
if(debug){
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fprintf(stderr, "Storing current terminal attributes\n");
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156
}
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157
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if (tcgetattr(STDIN_FILENO, &t_old) != 0){
123
perror("tcgetattr");
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return EXIT_FAILURE;
158
if(tcgetattr(STDIN_FILENO, &t_old) != 0){
159
int e = errno;
160
error(0, errno, "tcgetattr");
161
switch(e){
162
case EBADF:
163
case ENOTTY:
164
return EX_UNAVAILABLE;
165
default:
166
return EX_OSERR;
167
}
125
168
}
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169
127
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sigemptyset(&new_action.sa_mask);
128
sigaddset(&new_action.sa_mask, SIGINT);
129
sigaddset(&new_action.sa_mask, SIGHUP);
130
sigaddset(&new_action.sa_mask, SIGTERM);
171
ret = sigaddset(&new_action.sa_mask, SIGINT);
172
if(ret == -1){
173
error(0, errno, "sigaddset");
174
return EX_OSERR;
175
}
176
ret = sigaddset(&new_action.sa_mask, SIGHUP);
177
if(ret == -1){
178
error(0, errno, "sigaddset");
179
return EX_OSERR;
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}
181
ret = sigaddset(&new_action.sa_mask, SIGTERM);
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if(ret == -1){
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error(0, errno, "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 EXIT_FAILURE;
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error(0, errno, "sigaction");
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return EX_OSERR;
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}
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if (old_action.sa_handler != SIG_IGN){
195
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 EXIT_FAILURE;
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error(0, errno, "sigaction");
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return EX_OSERR;
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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 EXIT_FAILURE;
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error(0, errno, "sigaction");
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return EX_OSERR;
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}
148
if (old_action.sa_handler != SIG_IGN){
207
if(old_action.sa_handler != SIG_IGN){
149
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ret = sigaction(SIGHUP, &new_action, NULL);
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if(ret == -1){
151
perror("sigaction");
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return EXIT_FAILURE;
210
error(0, errno, "sigaction");
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return EX_OSERR;
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}
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}
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ret = sigaction(SIGTERM, NULL, &old_action);
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if(ret == -1){
157
perror("sigaction");
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return EXIT_FAILURE;
216
error(0, errno, "sigaction");
217
return EX_OSERR;
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}
160
if (old_action.sa_handler != SIG_IGN){
219
if(old_action.sa_handler != SIG_IGN){
161
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ret = sigaction(SIGTERM, &new_action, NULL);
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if(ret == -1){
163
perror("sigaction");
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return EXIT_FAILURE;
222
error(0, errno, "sigaction");
223
return EX_OSERR;
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}
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}
167
226
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if (debug){
228
if(debug){
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fprintf(stderr, "Removing echo flag from terminal attributes\n");
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}
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t_new = t_old;
174
t_new.c_lflag &= ~ECHO;
175
if (tcsetattr(STDIN_FILENO, TCSAFLUSH, &t_new) != 0){
176
perror("tcsetattr-echo");
177
return EXIT_FAILURE;
233
t_new.c_lflag &= ~(tcflag_t)ECHO;
234
if(tcsetattr(STDIN_FILENO, TCSAFLUSH, &t_new) != 0){
235
int e = errno;
236
error(0, errno, "tcsetattr-echo");
237
switch(e){
238
case EBADF:
239
case ENOTTY:
240
return EX_UNAVAILABLE;
241
case EINVAL:
242
default:
243
return EX_OSERR;
244
}
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}
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if (debug){
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247
if(debug){
181
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fprintf(stderr, "Waiting for input from stdin \n");
182
249
}
183
250
while(true){
184
if (quit_now){
251
if(quit_now){
185
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if(debug){
186
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fprintf(stderr, "Interrupted by signal, exiting.\n");
187
254
}
193
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fprintf(stderr, "%s ", prefix);
194
261
}
195
262
{
196
const char *cryptsource = getenv("cryptsource");
197
const char *crypttarget = getenv("crypttarget");
198
const char *const prompt
199
= "Enter passphrase to unlock the disk";
263
const char *cryptsource = getenv("CRYPTTAB_SOURCE");
264
const char *crypttarget = getenv("CRYPTTAB_NAME");
265
/* Before cryptsetup 1.1.0~rc2 */
266
if(cryptsource == NULL){
267
cryptsource = getenv("cryptsource");
268
}
269
if(crypttarget == NULL){
270
crypttarget = getenv("crypttarget");
271
}
272
const char *const prompt1 = "Unlocking the disk";
273
const char *const prompt2 = "Enter passphrase";
200
274
if(cryptsource == NULL){
201
275
if(crypttarget == NULL){
202
fprintf(stderr, "%s: ", prompt);
276
fprintf(stderr, "%s to unlock the disk: ", prompt2);
203
277
} else {
204
fprintf(stderr, "%s (%s): ", prompt, crypttarget);
278
fprintf(stderr, "%s (%s)\n%s: ", prompt1, crypttarget,
279
prompt2);
205
280
}
206
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} else {
207
282
if(crypttarget == NULL){
208
fprintf(stderr, "%s %s: ", prompt, cryptsource);
283
fprintf(stderr, "%s %s\n%s: ", prompt1, cryptsource,
284
prompt2);
209
285
} else {
210
fprintf(stderr, "%s %s (%s): ", prompt, cryptsource,
211
crypttarget);
286
fprintf(stderr, "%s %s (%s)\n%s: ", prompt1, cryptsource,
287
crypttarget, prompt2);
212
288
}
213
289
}
214
290
}
215
ret = getline(&buffer, &n, stdin);
216
if (ret > 0){
291
sret = getline(&buffer, &n, stdin);
292
if(sret > 0){
217
293
status = EXIT_SUCCESS;
218
294
/* Make n = data size instead of allocated buffer size */
219
n = (size_t)ret;
295
n = (size_t)sret;
220
296
/* Strip final newline */
221
if(n>0 and buffer[n-1] == '\n'){
297
if(n > 0 and buffer[n-1] == '\n'){
222
298
buffer[n-1] = '\0'; /* not strictly necessary */
223
299
n--;
224
300
}
225
301
size_t written = 0;
226
302
while(written < n){
227
ret = write(STDOUT_FILENO, buffer + written, n - written);
228
if(ret < 0){
229
perror("write");
230
status = EXIT_FAILURE;
231
break;
232
}
233
written += (size_t)ret;
303
sret = write(STDOUT_FILENO, buffer + written, n - written);
304
if(sret < 0){
305
int e = errno;
306
error(0, errno, "write");
307
switch(e){
308
case EBADF:
309
case EFAULT:
310
case EINVAL:
311
case EFBIG:
312
case EIO:
313
case ENOSPC:
314
default:
315
status = EX_IOERR;
316
break;
317
case EINTR:
318
status = EXIT_FAILURE;
319
break;
320
}
321
break;
322
}
323
written += (size_t)sret;
324
}
325
sret = close(STDOUT_FILENO);
326
if(sret == -1){
327
int e = errno;
328
error(0, errno, "close");
329
switch(e){
330
case EBADF:
331
status = EX_OSFILE;
332
break;
333
case EIO:
334
default:
335
status = EX_IOERR;
336
break;
337
}
234
338
}
235
339
break;
236
340
}
237
if (ret < 0){
238
if (errno != EINTR and not feof(stdin)){
239
perror("getline");
240
status = EXIT_FAILURE;
341
if(sret < 0){
342
int e = errno;
343
if(errno != EINTR and not feof(stdin)){
344
error(0, errno, "getline");
345
switch(e){
346
case EBADF:
347
status = EX_UNAVAILABLE;
348
case EIO:
349
case EINVAL:
350
default:
351
status = EX_IOERR;
352
break;
353
}
241
354
break;
242
355
}
243
356
}
244
/* if(ret == 0), then the only sensible thing to do is to retry to
357
/* if(sret == 0), then the only sensible thing to do is to retry to
245
358
read from stdin */
246
359
fputc('\n', stderr);
247
360
if(debug and not quit_now){
248
/* If quit_now is true, we were interrupted by a signal, and
361
/* If quit_now is nonzero, we were interrupted by a signal, and
249
362
will print that later, so no need to show this too. */
250
363
fprintf(stderr, "getline() returned 0, retrying.\n");
251
364
}
252
365
}
253
366
254
367
free(buffer);
255
368
256
if (debug){
369
if(debug){
257
370
fprintf(stderr, "Restoring terminal attributes\n");
258
371
}
259
if (tcsetattr(STDIN_FILENO, TCSAFLUSH, &t_old) != 0){
260
perror("tcsetattr+echo");
261
}
262
263
if (debug){
372
if(tcsetattr(STDIN_FILENO, TCSAFLUSH, &t_old) != 0){
373
error(0, errno, "tcsetattr+echo");
374
}
375
376
if(quit_now){
377
sigemptyset(&old_action.sa_mask);
378
old_action.sa_handler = SIG_DFL;
379
ret = sigaction(signal_received, &old_action, NULL);
380
if(ret == -1){
381
error(0, errno, "sigaction");
382
}
383
raise(signal_received);
384
}
385
386
if(debug){
264
387
fprintf(stderr, "%s is exiting with status %d\n", argv[0],
265
388
status);
266
389
}
267
if(status == EXIT_SUCCESS){
390
if(status == EXIT_SUCCESS or status == EX_OK){
268
391
fputc('\n', stderr);
269
392
}
270
393
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0