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- Committer: Björn Påhlsson
- Date: 2008-07-20 02:52:20 UTC
- Revision ID: belorn@braxen-20080720025220-r5u0388uy9iu23h6
Added following support:
Pluginbased client handler
rewritten Mandos client
Avahi instead of udp server discovery
openpgp encrypted key support
Passprompt stand alone application for direct console input
Added logging for Mandos server
Pluginbased client handler
rewritten Mandos client
Avahi instead of udp server discovery
openpgp encrypted key support
Passprompt stand alone application for direct console input
Added logging for Mandos server
- 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
27
#include <termios.h> /* struct termios, tcsetattr(),
1
#define _GNU_SOURCE /* getline() */
2
#define _FORTIFY_SOURCE 2
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(), vfprintf(),
45
vasprintf() */
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, strerror()
55
*/
56
#include <argp.h> /* struct argp_option, struct
57
argp_state, struct argp,
58
argp_parse(), error_t,
59
ARGP_KEY_ARG, ARGP_KEY_END,
60
ARGP_ERR_UNKNOWN */
61
#include <sysexits.h> /* EX_SOFTWARE, EX_OSERR,
62
EX_UNAVAILABLE, EX_IOERR, EX_OK */
63
#include <fcntl.h> /* open() */
64
#include <stdarg.h> /* va_list, va_start(), ... */
65
66
volatile sig_atomic_t quit_now = 0;
67
int signal_received;
68
bool debug = false;
69
const char *argp_program_version = "password-prompt " VERSION;
70
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
71
72
/* Needed for conflict resolution */
73
const char plymouth_name[] = "plymouthd";
74
75
/* Function to use when printing errors */
76
void error_plus(int status, int errnum, const char *formatstring,
77
...){
78
va_list ap;
79
char *text;
80
int ret;
81
82
va_start(ap, formatstring);
83
ret = vasprintf(&text, formatstring, ap);
84
if (ret == -1){
85
fprintf(stderr, "Mandos plugin %s: ",
86
program_invocation_short_name);
87
vfprintf(stderr, formatstring, ap);
88
fprintf(stderr, ": ");
89
fprintf(stderr, "%s\n", strerror(errnum));
90
error(status, errno, "vasprintf while printing error");
91
return;
92
}
93
fprintf(stderr, "Mandos plugin ");
94
error(status, errnum, "%s", text);
95
free(text);
96
}
97
98
static void termination_handler(int signum){
99
if(quit_now){
100
return;
101
}
102
quit_now = 1;
103
signal_received = signum;
104
}
105
106
bool conflict_detection(void){
107
108
/* plymouth conflicts with password-prompt since both want to read
109
from the terminal. Password-prompt will exit if it detects
110
plymouth since plymouth performs the same functionality.
111
*/
112
int is_plymouth(const struct dirent *proc_entry){
113
int ret;
114
int cl_fd;
115
{
116
uintmax_t maxvalue;
117
char *tmp;
118
errno = 0;
119
maxvalue = strtoumax(proc_entry->d_name, &tmp, 10);
120
121
if(errno != 0 or *tmp != '\0'
122
or maxvalue != (uintmax_t)((pid_t)maxvalue)){
123
return 0;
124
}
125
}
126
127
char *cmdline_filename;
128
ret = asprintf(&cmdline_filename, "/proc/%s/cmdline",
129
proc_entry->d_name);
130
if(ret == -1){
131
error(0, errno, "asprintf");
132
return 0;
133
}
134
135
/* Open /proc/<pid>/cmdline */
136
cl_fd = open(cmdline_filename, O_RDONLY);
137
free(cmdline_filename);
138
if(cl_fd == -1){
139
if(errno != ENOENT){
140
error(0, errno, "open");
141
}
142
return 0;
143
}
144
145
char *cmdline = NULL;
146
{
147
size_t cmdline_len = 0;
148
size_t cmdline_allocated = 0;
149
char *tmp;
150
const size_t blocksize = 1024;
151
ssize_t sret;
152
do {
153
/* Allocate more space? */
154
if(cmdline_len + blocksize + 1 > cmdline_allocated){
155
tmp = realloc(cmdline, cmdline_allocated + blocksize + 1);
156
if(tmp == NULL){
157
error(0, errno, "realloc");
158
free(cmdline);
159
close(cl_fd);
160
return 0;
161
}
162
cmdline = tmp;
163
cmdline_allocated += blocksize;
164
}
165
166
/* Read data */
167
sret = read(cl_fd, cmdline + cmdline_len,
168
cmdline_allocated - cmdline_len);
169
if(sret == -1){
170
error(0, errno, "read");
171
free(cmdline);
172
close(cl_fd);
173
return 0;
174
}
175
cmdline_len += (size_t)sret;
176
} while(sret != 0);
177
ret = close(cl_fd);
178
if(ret == -1){
179
error(0, errno, "close");
180
free(cmdline);
181
return 0;
182
}
183
cmdline[cmdline_len] = '\0'; /* Make sure it is terminated */
184
}
185
/* we now have cmdline */
186
187
/* get basename */
188
char *cmdline_base = strrchr(cmdline, '/');
189
if(cmdline_base != NULL){
190
cmdline_base += 1; /* skip the slash */
191
} else {
192
cmdline_base = cmdline;
193
}
194
195
if(strcmp(cmdline_base, plymouth_name) != 0){
196
if(debug){
197
fprintf(stderr, "\"%s\" is not \"%s\"\n", cmdline_base,
198
plymouth_name);
199
}
200
free(cmdline);
201
return 0;
202
}
203
if(debug){
204
fprintf(stderr, "\"%s\" equals \"%s\"\n", cmdline_base,
205
plymouth_name);
206
}
207
free(cmdline);
208
return 1;
209
}
210
211
struct dirent **direntries;
212
int ret;
213
ret = scandir("/proc", &direntries, is_plymouth, alphasort);
214
if (ret == -1){
215
error(1, errno, "scandir");
216
}
217
return ret > 0;
218
}
219
21
22
volatile bool quit_now = false;
23
24
void termination_handler(int signum){
25
quit_now = true;
26
}
220
27
221
28
int main(int argc, char **argv){
222
ssize_t sret;
223
int ret;
29
ssize_t ret = -1;
224
30
size_t n;
225
31
struct termios t_new, t_old;
226
32
char *buffer = NULL;
227
char *prefix = NULL;
228
33
int status = EXIT_SUCCESS;
229
34
struct sigaction old_action,
230
35
new_action = { .sa_handler = termination_handler,
231
36
.sa_flags = 0 };
232
{
233
struct argp_option options[] = {
234
{ .name = "prefix", .key = 'p',
235
.arg = "PREFIX", .flags = 0,
236
.doc = "Prefix shown before the prompt", .group = 2 },
237
{ .name = "debug", .key = 128,
238
.doc = "Debug mode", .group = 3 },
239
/*
240
* These reproduce what we would get without ARGP_NO_HELP
241
*/
242
{ .name = "help", .key = '?',
243
.doc = "Give this help list", .group = -1 },
244
{ .name = "usage", .key = -3,
245
.doc = "Give a short usage message", .group = -1 },
246
{ .name = "version", .key = 'V',
247
.doc = "Print program version", .group = -1 },
248
{ .name = NULL }
249
};
250
251
error_t parse_opt (int key, char *arg, struct argp_state *state){
252
errno = 0;
253
switch (key){
254
case 'p':
255
prefix = arg;
256
break;
257
case 128:
258
debug = true;
259
break;
260
/*
261
* These reproduce what we would get without ARGP_NO_HELP
262
*/
263
case '?': /* --help */
264
argp_state_help(state, state->out_stream,
265
(ARGP_HELP_STD_HELP | ARGP_HELP_EXIT_ERR)
266
& ~(unsigned int)ARGP_HELP_EXIT_OK);
267
case -3: /* --usage */
268
argp_state_help(state, state->out_stream,
269
ARGP_HELP_USAGE | ARGP_HELP_EXIT_ERR);
270
case 'V': /* --version */
271
fprintf(state->out_stream, "%s\n", argp_program_version);
272
exit(argp_err_exit_status);
273
break;
274
default:
275
return ARGP_ERR_UNKNOWN;
276
}
277
return errno;
278
}
279
280
struct argp argp = { .options = options, .parser = parse_opt,
281
.args_doc = "",
282
.doc = "Mandos password-prompt -- Read and"
283
" output a password" };
284
ret = argp_parse(&argp, argc, argv,
285
ARGP_IN_ORDER | ARGP_NO_HELP, NULL, NULL);
286
switch(ret){
287
case 0:
288
break;
289
case ENOMEM:
290
default:
291
errno = ret;
292
error(0, errno, "argp_parse");
293
return EX_OSERR;
294
case EINVAL:
295
return EX_USAGE;
296
}
297
}
298
37
299
if(debug){
300
fprintf(stderr, "Starting %s\n", argv[0]);
301
}
302
303
if (conflict_detection()){
304
if(debug){
305
fprintf(stderr, "Stopping %s because of conflict\n", argv[0]);
306
}
38
if (tcgetattr(STDIN_FILENO, &t_old) != 0){
307
39
return EXIT_FAILURE;
308
40
}
309
41
310
if(debug){
311
fprintf(stderr, "Storing current terminal attributes\n");
312
}
313
314
if(tcgetattr(STDIN_FILENO, &t_old) != 0){
315
int e = errno;
316
error(0, errno, "tcgetattr");
317
switch(e){
318
case EBADF:
319
case ENOTTY:
320
return EX_UNAVAILABLE;
321
default:
322
return EX_OSERR;
323
}
324
}
325
326
42
sigemptyset(&new_action.sa_mask);
327
ret = sigaddset(&new_action.sa_mask, SIGINT);
328
if(ret == -1){
329
error(0, errno, "sigaddset");
330
return EX_OSERR;
331
}
332
ret = sigaddset(&new_action.sa_mask, SIGHUP);
333
if(ret == -1){
334
error(0, errno, "sigaddset");
335
return EX_OSERR;
336
}
337
ret = sigaddset(&new_action.sa_mask, SIGTERM);
338
if(ret == -1){
339
error(0, errno, "sigaddset");
340
return EX_OSERR;
341
}
342
/* Need to check if the handler is SIG_IGN before handling:
343
| [[info:libc:Initial Signal Actions]] |
344
| [[info:libc:Basic Signal Handling]] |
345
*/
346
ret = sigaction(SIGINT, NULL, &old_action);
347
if(ret == -1){
348
error(0, errno, "sigaction");
349
return EX_OSERR;
350
}
351
if(old_action.sa_handler != SIG_IGN){
352
ret = sigaction(SIGINT, &new_action, NULL);
353
if(ret == -1){
354
error(0, errno, "sigaction");
355
return EX_OSERR;
356
}
357
}
358
ret = sigaction(SIGHUP, NULL, &old_action);
359
if(ret == -1){
360
error(0, errno, "sigaction");
361
return EX_OSERR;
362
}
363
if(old_action.sa_handler != SIG_IGN){
364
ret = sigaction(SIGHUP, &new_action, NULL);
365
if(ret == -1){
366
error(0, errno, "sigaction");
367
return EX_OSERR;
368
}
369
}
370
ret = sigaction(SIGTERM, NULL, &old_action);
371
if(ret == -1){
372
error(0, errno, "sigaction");
373
return EX_OSERR;
374
}
375
if(old_action.sa_handler != SIG_IGN){
376
ret = sigaction(SIGTERM, &new_action, NULL);
377
if(ret == -1){
378
error(0, errno, "sigaction");
379
return EX_OSERR;
380
}
381
}
382
383
384
if(debug){
385
fprintf(stderr, "Removing echo flag from terminal attributes\n");
386
}
43
sigaddset(&new_action.sa_mask, SIGINT);
44
sigaddset(&new_action.sa_mask, SIGQUIT);
45
sigaddset(&new_action.sa_mask, SIGHUP);
46
sigaddset(&new_action.sa_mask, SIGTERM);
47
sigaction(SIGINT, NULL, &old_action);
48
if (old_action.sa_handler != SIG_IGN)
49
sigaction(SIGINT, &new_action, NULL);
50
sigaction(SIGQUIT, NULL, &old_action);
51
if (old_action.sa_handler != SIG_IGN)
52
sigaction(SIGQUIT, &new_action, NULL);
53
sigaction(SIGHUP, NULL, &old_action);
54
if (old_action.sa_handler != SIG_IGN)
55
sigaction(SIGHUP, &new_action, NULL);
56
sigaction(SIGTERM, NULL, &old_action);
57
if (old_action.sa_handler != SIG_IGN)
58
sigaction(SIGTERM, &new_action, NULL);
387
59
388
60
t_new = t_old;
389
t_new.c_lflag &= ~(tcflag_t)ECHO;
390
if(tcsetattr(STDIN_FILENO, TCSAFLUSH, &t_new) != 0){
391
int e = errno;
392
error(0, errno, "tcsetattr-echo");
393
switch(e){
394
case EBADF:
395
case ENOTTY:
396
return EX_UNAVAILABLE;
397
case EINVAL:
398
default:
399
return EX_OSERR;
400
}
61
t_new.c_lflag &= ~ECHO;
62
if (tcsetattr(STDIN_FILENO, TCSAFLUSH, &t_new) != 0){
63
perror("tcsetattr-echo");
64
return EXIT_FAILURE;
401
65
}
402
66
403
if(debug){
404
fprintf(stderr, "Waiting for input from stdin \n");
405
}
406
67
while(true){
407
if(quit_now){
408
if(debug){
409
fprintf(stderr, "Interrupted by signal, exiting.\n");
410
}
68
if (quit_now){
411
69
status = EXIT_FAILURE;
412
70
break;
413
71
}
414
415
if(prefix){
416
fprintf(stderr, "%s ", prefix);
417
}
418
{
419
const char *cryptsource = getenv("CRYPTTAB_SOURCE");
420
const char *crypttarget = getenv("CRYPTTAB_NAME");
421
/* Before cryptsetup 1.1.0~rc2 */
422
if(cryptsource == NULL){
423
cryptsource = getenv("cryptsource");
424
}
425
if(crypttarget == NULL){
426
crypttarget = getenv("crypttarget");
427
}
428
const char *const prompt1 = "Unlocking the disk";
429
const char *const prompt2 = "Enter passphrase";
430
if(cryptsource == NULL){
431
if(crypttarget == NULL){
432
fprintf(stderr, "%s to unlock the disk: ", prompt2);
433
} else {
434
fprintf(stderr, "%s (%s)\n%s: ", prompt1, crypttarget,
435
prompt2);
436
}
437
} else {
438
if(crypttarget == NULL){
439
fprintf(stderr, "%s %s\n%s: ", prompt1, cryptsource,
440
prompt2);
441
} else {
442
fprintf(stderr, "%s %s (%s)\n%s: ", prompt1, cryptsource,
443
crypttarget, prompt2);
444
}
445
}
446
}
447
sret = getline(&buffer, &n, stdin);
448
if(sret > 0){
72
fprintf(stderr, "Password: ");
73
ret = getline(&buffer, &n, stdin);
74
if (ret > 0){
75
fprintf(stdout, "%s", buffer);
449
76
status = EXIT_SUCCESS;
450
/* Make n = data size instead of allocated buffer size */
451
n = (size_t)sret;
452
/* Strip final newline */
453
if(n > 0 and buffer[n-1] == '\n'){
454
buffer[n-1] = '\0'; /* not strictly necessary */
455
n--;
456
}
457
size_t written = 0;
458
while(written < n){
459
sret = write(STDOUT_FILENO, buffer + written, n - written);
460
if(sret < 0){
461
int e = errno;
462
error(0, errno, "write");
463
switch(e){
464
case EBADF:
465
case EFAULT:
466
case EINVAL:
467
case EFBIG:
468
case EIO:
469
case ENOSPC:
470
default:
471
status = EX_IOERR;
472
break;
473
case EINTR:
474
status = EXIT_FAILURE;
475
break;
476
}
477
break;
478
}
479
written += (size_t)sret;
480
}
481
sret = close(STDOUT_FILENO);
482
if(sret == -1){
483
int e = errno;
484
error(0, errno, "close");
485
switch(e){
486
case EBADF:
487
status = EX_OSFILE;
488
break;
489
case EIO:
490
default:
491
status = EX_IOERR;
492
break;
493
}
494
}
495
77
break;
496
78
}
497
if(sret < 0){
498
int e = errno;
499
if(errno != EINTR and not feof(stdin)){
500
error(0, errno, "getline");
501
switch(e){
502
case EBADF:
503
status = EX_UNAVAILABLE;
504
case EIO:
505
case EINVAL:
506
default:
507
status = EX_IOERR;
508
break;
509
}
79
// ret == 0 makes no other sence than to retry to read from stdin
80
if (ret < 0){
81
if (errno != EINTR and not feof(stdin)){
82
perror("getline");
83
status = EXIT_FAILURE;
510
84
break;
511
85
}
512
86
}
513
/* if(sret == 0), then the only sensible thing to do is to retry
514
to read from stdin */
515
fputc('\n', stderr);
516
if(debug and not quit_now){
517
/* If quit_now is nonzero, we were interrupted by a signal, and
518
will print that later, so no need to show this too. */
519
fprintf(stderr, "getline() returned 0, retrying.\n");
520
}
521
}
522
523
free(buffer);
524
525
if(debug){
526
fprintf(stderr, "Restoring terminal attributes\n");
527
}
528
if(tcsetattr(STDIN_FILENO, TCSAFLUSH, &t_old) != 0){
529
error(0, errno, "tcsetattr+echo");
530
}
531
532
if(quit_now){
533
sigemptyset(&old_action.sa_mask);
534
old_action.sa_handler = SIG_DFL;
535
ret = sigaction(signal_received, &old_action, NULL);
536
if(ret == -1){
537
error(0, errno, "sigaction");
538
}
539
raise(signal_received);
540
}
541
542
if(debug){
543
fprintf(stderr, "%s is exiting with status %d\n", argv[0],
544
status);
545
}
546
if(status == EXIT_SUCCESS or status == EX_OK){
547
fputc('\n', stderr);
87
fputc('\n', stderr);
88
}
89
90
if (tcsetattr(STDIN_FILENO, TCSAFLUSH, &t_old) != 0){
91
perror("tcsetattr+echo");
548
92
}
549
93
550
94
return status;
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0