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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
- debian/source
- 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 © 2008-2010 Teddy Hogeborn
6
* Copyright © 2008-2010 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
#define _GNU_SOURCE /* getline(), asprintf() */
26
1
#define _GNU_SOURCE /* getline() */
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(),
30
6
STDIN_FILENO, TCSAFLUSH,
31
tcgetattr(), ECHO, readlink() */
7
tcgetattr(), ECHO */
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 */
38
#include <sys/types.h> /* ssize_t, struct dirent, pid_t,
39
ssize_t, open() */
40
#include <stdlib.h> /* EXIT_SUCCESS, EXIT_FAILURE,
41
getenv(), free() */
42
#include <dirent.h> /* scandir(), alphasort() */
11
SIGQUIT, SIGHUP, SIGTERM */
12
#include <stddef.h> /* NULL, size_t */
13
#include <sys/types.h> /* ssize_t */
14
#include <stdlib.h> /* EXIT_SUCCESS, EXIT_FAILURE */
43
15
#include <stdio.h> /* fprintf(), stderr, getline(),
44
stdin, feof(), fputc()
45
*/
46
#include <errno.h> /* errno, EBADF, ENOTTY, EINVAL,
47
EFAULT, EFBIG, EIO, ENOSPC, EINTR
48
*/
49
#include <error.h> /* error() */
16
stdin, feof(), perror(), fputc(),
17
stdout */
18
#include <errno.h> /* errno, EINVAL */
50
19
#include <iso646.h> /* or, not */
51
20
#include <stdbool.h> /* bool, false, true */
52
#include <inttypes.h> /* strtoumax() */
53
#include <sys/stat.h> /* struct stat, lstat(), open() */
54
#include <string.h> /* strlen, rindex, memcmp */
55
#include <argp.h> /* struct argp_option, struct
56
argp_state, struct argp,
57
argp_parse(), error_t,
58
ARGP_KEY_ARG, ARGP_KEY_END,
59
ARGP_ERR_UNKNOWN */
60
#include <sysexits.h> /* EX_SOFTWARE, EX_OSERR,
61
EX_UNAVAILABLE, EX_IOERR, EX_OK */
62
#include <fcntl.h> /* open() */
21
#include <string.h> /* strlen, rindex, strncmp, strcmp */
63
22
64
volatile sig_atomic_t quit_now = 0;
65
int signal_received;
23
volatile bool quit_now = false;
66
24
bool debug = false;
67
const char *argp_program_version = "password-prompt " VERSION;
68
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
69
70
/* Needed for conflic resolution */
71
const char plymouthd_name[] = "plymouthd";
72
73
74
static void termination_handler(int signum){
75
if(quit_now){
76
return;
77
}
78
quit_now = 1;
79
signal_received = signum;
80
}
81
82
bool conflict_detection(void){
83
84
/* plymouth conflicts with password-prompt since both want to read
85
from the terminal. Password-prompt will exit if it detects
86
plymouth since plymouth performs the same functionality.
87
*/
88
int is_plymouth(const struct dirent *proc_entry){
89
int ret;
90
int cl_fd;
91
{
92
uintmax_t maxvalue;
93
char *tmp;
94
errno = 0;
95
maxvalue = strtoumax(proc_entry->d_name, &tmp, 10);
96
97
if(errno != 0 or *tmp != '\0'
98
or maxvalue != (uintmax_t)((pid_t)maxvalue)){
99
return 0;
100
}
101
}
102
103
char *cmdline_filename;
104
ret = asprintf(&cmdline_filename, "/proc/%s/cmdline", proc_entry->d_name);
105
if(ret == -1){
106
error(0, errno, "asprintf");
107
return 0;
108
}
109
110
/* Open /proc/<pid>/cmdline */
111
cl_fd = open(cmdline_filename, O_RDONLY);
112
free(cmdline_filename);
113
if(cl_fd == -1){
114
error(0, errno, "open");
115
return 0;
116
}
117
118
char *cmdline = NULL;
119
{
120
size_t cmdline_len = 0;
121
size_t cmdline_allocated = 0;
122
char *tmp;
123
const size_t blocksize = 1024;
124
ssize_t sret;
125
do {
126
/* Allocate more space? */
127
if(cmdline_len + blocksize + 1 > cmdline_allocated){
128
tmp = realloc(cmdline, cmdline_allocated + blocksize + 1);
129
if(tmp == NULL){
130
error(0, errno, "realloc");
131
free(cmdline);
132
close(cl_fd);
133
return 0;
134
}
135
cmdline = tmp;
136
cmdline_allocated += blocksize;
137
}
138
139
/* Read data */
140
sret = read(cl_fd, cmdline + cmdline_len,
141
cmdline_allocated - cmdline_len);
142
if(sret == -1){
143
error(0, errno, "read");
144
free(cmdline);
145
close(cl_fd);
146
return 0;
147
}
148
cmdline_len += (size_t)sret;
149
} while(sret != 0);
150
ret = close(cl_fd);
151
if(ret == -1){
152
error(0, errno, "close");
153
free(cmdline);
154
return 0;
155
}
156
cmdline[cmdline_len] = '\0'; /* Make sure it is terminated */
157
}
158
/* we now have cmdline */
159
160
/* get basename */
161
char *cmdline_base = strrchr(cmdline, '/');
162
if(cmdline_base != NULL){
163
cmdline_base += 1; /* skip the slash */
164
} else {
165
cmdline_base = cmdline;
166
}
167
168
if(strcmp(cmdline_base, plymouthd_name) != 0){
169
free(cmdline);
170
return 0;
171
}
172
free(cmdline);
173
return 1;
174
}
175
176
struct dirent **direntries;
177
int ret;
178
ret = scandir("/proc", &direntries, is_plymouth, alphasort);
179
if (ret == -1){
180
error(1, errno, "scandir");
181
}
182
return ret > 0;
183
}
184
25
26
void termination_handler(int signum){
27
quit_now = true;
28
}
185
29
186
30
int main(int argc, char **argv){
187
ssize_t sret;
188
int ret;
31
ssize_t ret = -1;
189
32
size_t n;
190
33
struct termios t_new, t_old;
191
34
char *buffer = NULL;
192
char *prefix = NULL;
193
35
int status = EXIT_SUCCESS;
194
36
struct sigaction old_action,
195
37
new_action = { .sa_handler = termination_handler,
196
38
.sa_flags = 0 };
197
{
198
struct argp_option options[] = {
199
{ .name = "prefix", .key = 'p',
200
.arg = "PREFIX", .flags = 0,
201
.doc = "Prefix shown before the prompt", .group = 2 },
202
{ .name = "debug", .key = 128,
203
.doc = "Debug mode", .group = 3 },
204
/*
205
* These reproduce what we would get without ARGP_NO_HELP
206
*/
207
{ .name = "help", .key = '?',
208
.doc = "Give this help list", .group = -1 },
209
{ .name = "usage", .key = -3,
210
.doc = "Give a short usage message", .group = -1 },
211
{ .name = "version", .key = 'V',
212
.doc = "Print program version", .group = -1 },
213
{ .name = NULL }
214
};
215
216
error_t parse_opt (int key, char *arg, struct argp_state *state){
217
errno = 0;
218
switch (key){
219
case 'p':
220
prefix = arg;
221
break;
222
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)){
223
59
debug = true;
224
break;
225
/*
226
* These reproduce what we would get without ARGP_NO_HELP
227
*/
228
case '?': /* --help */
229
argp_state_help(state, state->out_stream,
230
(ARGP_HELP_STD_HELP | ARGP_HELP_EXIT_ERR)
231
& ~(unsigned int)ARGP_HELP_EXIT_OK);
232
case -3: /* --usage */
233
argp_state_help(state, state->out_stream,
234
ARGP_HELP_USAGE | ARGP_HELP_EXIT_ERR);
235
case 'V': /* --version */
236
fprintf(state->out_stream, "%s\n", argp_program_version);
237
exit(argp_err_exit_status);
238
break;
239
default:
240
return ARGP_ERR_UNKNOWN;
241
60
}
242
return errno;
243
}
244
245
struct argp argp = { .options = options, .parser = parse_opt,
246
.args_doc = "",
247
.doc = "Mandos password-prompt -- Read and"
248
" output a password" };
249
ret = argp_parse(&argp, argc, argv,
250
ARGP_IN_ORDER | ARGP_NO_HELP, NULL, NULL);
251
switch(ret){
252
case 0:
253
break;
254
case ENOMEM:
255
default:
256
errno = ret;
257
error(0, errno, "argp_parse");
258
return EX_OSERR;
259
case EINVAL:
260
return EX_USAGE;
261
61
}
262
62
}
263
264
if(debug){
63
free(program_name);
64
65
if (debug){
265
66
fprintf(stderr, "Starting %s\n", argv[0]);
266
67
}
267
268
if (conflict_detection()){
269
if(debug){
270
fprintf(stderr, "Stopping %s because of conflict", argv[0]);
271
}
272
return EXIT_FAILURE;
273
}
274
275
if(debug){
68
if (debug){
276
69
fprintf(stderr, "Storing current terminal attributes\n");
277
70
}
278
71
279
if(tcgetattr(STDIN_FILENO, &t_old) != 0){
280
int e = errno;
281
error(0, errno, "tcgetattr");
282
switch(e){
283
case EBADF:
284
case ENOTTY:
285
return EX_UNAVAILABLE;
286
default:
287
return EX_OSERR;
288
}
72
if (tcgetattr(STDIN_FILENO, &t_old) != 0){
73
return EXIT_FAILURE;
289
74
}
290
75
291
76
sigemptyset(&new_action.sa_mask);
292
ret = sigaddset(&new_action.sa_mask, SIGINT);
293
if(ret == -1){
294
error(0, errno, "sigaddset");
295
return EX_OSERR;
296
}
297
ret = sigaddset(&new_action.sa_mask, SIGHUP);
298
if(ret == -1){
299
error(0, errno, "sigaddset");
300
return EX_OSERR;
301
}
302
ret = sigaddset(&new_action.sa_mask, SIGTERM);
303
if(ret == -1){
304
error(0, errno, "sigaddset");
305
return EX_OSERR;
306
}
307
/* Need to check if the handler is SIG_IGN before handling:
308
| [[info:libc:Initial Signal Actions]] |
309
| [[info:libc:Basic Signal Handling]] |
310
*/
311
ret = sigaction(SIGINT, NULL, &old_action);
312
if(ret == -1){
313
error(0, errno, "sigaction");
314
return EX_OSERR;
315
}
316
if(old_action.sa_handler != SIG_IGN){
317
ret = sigaction(SIGINT, &new_action, NULL);
318
if(ret == -1){
319
error(0, errno, "sigaction");
320
return EX_OSERR;
321
}
322
}
323
ret = sigaction(SIGHUP, NULL, &old_action);
324
if(ret == -1){
325
error(0, errno, "sigaction");
326
return EX_OSERR;
327
}
328
if(old_action.sa_handler != SIG_IGN){
329
ret = sigaction(SIGHUP, &new_action, NULL);
330
if(ret == -1){
331
error(0, errno, "sigaction");
332
return EX_OSERR;
333
}
334
}
335
ret = sigaction(SIGTERM, NULL, &old_action);
336
if(ret == -1){
337
error(0, errno, "sigaction");
338
return EX_OSERR;
339
}
340
if(old_action.sa_handler != SIG_IGN){
341
ret = sigaction(SIGTERM, &new_action, NULL);
342
if(ret == -1){
343
error(0, errno, "sigaction");
344
return EX_OSERR;
345
}
346
}
347
348
349
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){
350
96
fprintf(stderr, "Removing echo flag from terminal attributes\n");
351
97
}
352
98
353
99
t_new = t_old;
354
t_new.c_lflag &= ~(tcflag_t)ECHO;
355
if(tcsetattr(STDIN_FILENO, TCSAFLUSH, &t_new) != 0){
356
int e = errno;
357
error(0, errno, "tcsetattr-echo");
358
switch(e){
359
case EBADF:
360
case ENOTTY:
361
return EX_UNAVAILABLE;
362
case EINVAL:
363
default:
364
return EX_OSERR;
365
}
100
t_new.c_lflag &= ~ECHO;
101
if (tcsetattr(STDIN_FILENO, TCSAFLUSH, &t_new) != 0){
102
perror("tcsetattr-echo");
103
return EXIT_FAILURE;
366
104
}
367
368
if(debug){
105
106
if (debug){
369
107
fprintf(stderr, "Waiting for input from stdin \n");
370
108
}
371
109
while(true){
372
if(quit_now){
373
if(debug){
374
fprintf(stderr, "Interrupted by signal, exiting.\n");
375
}
110
if (quit_now){
376
111
status = EXIT_FAILURE;
377
112
break;
378
113
}
379
380
if(prefix){
381
fprintf(stderr, "%s ", prefix);
382
}
383
{
384
const char *cryptsource = getenv("CRYPTTAB_SOURCE");
385
const char *crypttarget = getenv("CRYPTTAB_NAME");
386
/* Before cryptsetup 1.1.0~rc2 */
387
if(cryptsource == NULL){
388
cryptsource = getenv("cryptsource");
389
}
390
if(crypttarget == NULL){
391
crypttarget = getenv("crypttarget");
392
}
393
const char *const prompt1 = "Unlocking the disk";
394
const char *const prompt2 = "Enter passphrase";
395
if(cryptsource == NULL){
396
if(crypttarget == NULL){
397
fprintf(stderr, "%s to unlock the disk: ", prompt2);
398
} else {
399
fprintf(stderr, "%s (%s)\n%s: ", prompt1, crypttarget,
400
prompt2);
401
}
402
} else {
403
if(crypttarget == NULL){
404
fprintf(stderr, "%s %s\n%s: ", prompt1, cryptsource,
405
prompt2);
406
} else {
407
fprintf(stderr, "%s %s (%s)\n%s: ", prompt1, cryptsource,
408
crypttarget, prompt2);
409
}
410
}
411
}
412
sret = getline(&buffer, &n, stdin);
413
if(sret > 0){
114
fprintf(stderr, "Password: ");
115
ret = getline(&buffer, &n, stdin);
116
if (ret > 0){
117
fprintf(stdout, "%s", buffer);
414
118
status = EXIT_SUCCESS;
415
/* Make n = data size instead of allocated buffer size */
416
n = (size_t)sret;
417
/* Strip final newline */
418
if(n > 0 and buffer[n-1] == '\n'){
419
buffer[n-1] = '\0'; /* not strictly necessary */
420
n--;
421
}
422
size_t written = 0;
423
while(written < n){
424
sret = write(STDOUT_FILENO, buffer + written, n - written);
425
if(sret < 0){
426
int e = errno;
427
error(0, errno, "write");
428
switch(e){
429
case EBADF:
430
case EFAULT:
431
case EINVAL:
432
case EFBIG:
433
case EIO:
434
case ENOSPC:
435
default:
436
status = EX_IOERR;
437
break;
438
case EINTR:
439
status = EXIT_FAILURE;
440
break;
441
}
442
break;
443
}
444
written += (size_t)sret;
445
}
446
sret = close(STDOUT_FILENO);
447
if(sret == -1){
448
int e = errno;
449
error(0, errno, "close");
450
switch(e){
451
case EBADF:
452
status = EX_OSFILE;
453
break;
454
case EIO:
455
default:
456
status = EX_IOERR;
457
break;
458
}
459
}
460
119
break;
461
120
}
462
if(sret < 0){
463
int e = errno;
464
if(errno != EINTR and not feof(stdin)){
465
error(0, errno, "getline");
466
switch(e){
467
case EBADF:
468
status = EX_UNAVAILABLE;
469
case EIO:
470
case EINVAL:
471
default:
472
status = EX_IOERR;
473
break;
474
}
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)){
124
perror("getline");
125
status = EXIT_FAILURE;
475
126
break;
476
127
}
477
128
}
478
/* if(sret == 0), then the only sensible thing to do is to retry to
479
read from stdin */
480
129
fputc('\n', stderr);
481
if(debug and not quit_now){
482
/* If quit_now is nonzero, we were interrupted by a signal, and
483
will print that later, so no need to show this too. */
484
fprintf(stderr, "getline() returned 0, retrying.\n");
485
}
486
130
}
487
488
free(buffer);
489
490
if(debug){
131
132
if (debug){
491
133
fprintf(stderr, "Restoring terminal attributes\n");
492
134
}
493
if(tcsetattr(STDIN_FILENO, TCSAFLUSH, &t_old) != 0){
494
error(0, errno, "tcsetattr+echo");
495
}
496
497
if(quit_now){
498
sigemptyset(&old_action.sa_mask);
499
old_action.sa_handler = SIG_DFL;
500
ret = sigaction(signal_received, &old_action, NULL);
501
if(ret == -1){
502
error(0, errno, "sigaction");
503
}
504
raise(signal_received);
505
}
506
507
if(debug){
508
fprintf(stderr, "%s is exiting with status %d\n", argv[0],
509
status);
510
}
511
if(status == EXIT_SUCCESS or status == EX_OK){
512
fputc('\n', stderr);
135
if (tcsetattr(STDIN_FILENO, TCSAFLUSH, &t_old) != 0){
136
perror("tcsetattr+echo");
137
}
138
139
if (debug){
140
fprintf(stderr, "%s is exiting\n", argv[0]);
513
141
}
514
142
515
143
return status;
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