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- Committer: teddy at bsnet
- Date: 2011-02-11 19:36:42 UTC
- mto: This revision was merged to the branch mainline in revision 465.
- Revision ID: teddy@fukt.bsnet.se-20110211193642-bj1fr6n33hc0oi0m
* mandos: Use only unicode string literals.
- files removed:
- bugs.xml
- debian/upstream
- network-hooks.d
- plugin-helpers
- files modified:
- .bzrignore
added
removed
plugins.d/password-prompt.c
2
2
/*
3
3
* Password-prompt - Read a password from the terminal and print it
4
4
*
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* Copyright © 2008-2018 Teddy Hogeborn
6
* Copyright © 2008-2018 Björn Påhlsson
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*
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* This file is part of Mandos.
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*
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* Mandos is free software: you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by
12
* the Free Software Foundation, either version 3 of the License, or
13
* (at your option) any later version.
14
*
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* Mandos is distributed in the hope that it will be useful, but
5
* Copyright © 2008-2010 Teddy Hogeborn
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* Copyright © 2008-2010 Björn Påhlsson
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*
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* 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
16
14
* WITHOUT ANY WARRANTY; without even the implied warranty of
17
15
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18
16
* General Public License for more details.
19
17
*
20
18
* You should have received a copy of the GNU General Public License
21
* along with Mandos. If not, see <http://www.gnu.org/licenses/>.
19
* along with this program. If not, see
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* <http://www.gnu.org/licenses/>.
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21
*
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* Contact the authors at <mandos@recompile.se>.
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* Contact the authors at <mandos@fukt.bsnet.se>.
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23
*/
25
24
26
25
#define _GNU_SOURCE /* getline(), asprintf() */
27
26
28
#include <termios.h> /* struct termios, tcsetattr(),
27
#include <termios.h> /* struct termios, tcsetattr(),
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28
TCSAFLUSH, tcgetattr(), ECHO */
30
29
#include <unistd.h> /* struct termios, tcsetattr(),
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30
STDIN_FILENO, TCSAFLUSH,
36
35
SIGQUIT, SIGHUP, SIGTERM,
37
36
raise() */
38
37
#include <stddef.h> /* NULL, size_t, ssize_t */
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#include <sys/types.h> /* ssize_t, struct dirent, pid_t,
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ssize_t, open() */
38
#include <sys/types.h> /* ssize_t, struct dirent, pid_t, ssize_t */
41
39
#include <stdlib.h> /* EXIT_SUCCESS, EXIT_FAILURE,
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40
getenv(), free() */
43
41
#include <dirent.h> /* scandir(), alphasort() */
44
42
#include <stdio.h> /* fprintf(), stderr, getline(),
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stdin, feof(), fputc(), vfprintf(),
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vasprintf() */
43
stdin, feof(), fputc()
44
*/
47
45
#include <errno.h> /* errno, EBADF, ENOTTY, EINVAL,
48
46
EFAULT, EFBIG, EIO, ENOSPC, EINTR
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47
*/
51
49
#include <iso646.h> /* or, not */
52
50
#include <stdbool.h> /* bool, false, true */
53
51
#include <inttypes.h> /* strtoumax() */
54
#include <sys/stat.h> /* struct stat, lstat(), open() */
55
#include <string.h> /* strlen, rindex, memcmp, strerror()
56
*/
52
#include <sys/stat.h> /* struct stat, lstat() */
53
#include <string.h> /* strlen, rindex, memcmp */
57
54
#include <argp.h> /* struct argp_option, struct
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argp_state, struct argp,
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56
argp_parse(), error_t,
61
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ARGP_ERR_UNKNOWN */
62
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#include <sysexits.h> /* EX_SOFTWARE, EX_OSERR,
63
60
EX_UNAVAILABLE, EX_IOERR, EX_OK */
64
#include <fcntl.h> /* open() */
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#include <stdarg.h> /* va_list, va_start(), ... */
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61
67
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volatile sig_atomic_t quit_now = 0;
68
63
int signal_received;
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bool debug = false;
70
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const char *argp_program_version = "password-prompt " VERSION;
71
const char *argp_program_bug_address = "<mandos@recompile.se>";
72
73
/* Needed for conflict resolution */
74
const char plymouth_name[] = "plymouthd";
75
76
/* Function to use when printing errors */
77
__attribute__((format (gnu_printf, 3, 4)))
78
void error_plus(int status, int errnum, const char *formatstring,
79
...){
80
va_list ap;
81
char *text;
82
int ret;
83
84
va_start(ap, formatstring);
85
ret = vasprintf(&text, formatstring, ap);
86
if(ret == -1){
87
fprintf(stderr, "Mandos plugin %s: ",
88
program_invocation_short_name);
89
vfprintf(stderr, formatstring, ap);
90
fprintf(stderr, ": %s\n", strerror(errnum));
91
error(status, errno, "vasprintf while printing error");
92
return;
93
}
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fprintf(stderr, "Mandos plugin ");
95
error(status, errnum, "%s", text);
96
free(text);
97
}
66
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
67
68
/* Needed for conflic resolution */
69
const char plymouthd_path[] = "/sbin/plymouth";
70
98
71
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static void termination_handler(int signum){
100
73
if(quit_now){
106
79
107
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bool conflict_detection(void){
108
81
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/* plymouth conflicts with password-prompt since both want to read
110
from the terminal. Password-prompt will exit if it detects
111
plymouth since plymouth performs the same functionality.
82
/* plymouth conflicts with password-promt since both want to control the
83
associated terminal. Password-prompt exit since plymouth perferms the same
84
functionallity.
112
85
*/
113
__attribute__((nonnull))
114
86
int is_plymouth(const struct dirent *proc_entry){
115
87
int ret;
116
int cl_fd;
117
88
{
118
uintmax_t proc_id;
89
uintmax_t maxvalue;
119
90
char *tmp;
120
91
errno = 0;
121
proc_id = strtoumax(proc_entry->d_name, &tmp, 10);
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maxvalue = strtoumax(proc_entry->d_name, &tmp, 10);
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123
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if(errno != 0 or *tmp != '\0'
124
or proc_id != (uintmax_t)((pid_t)proc_id)){
95
or maxvalue != (uintmax_t)((pid_t)maxvalue)){
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return 0;
126
97
}
127
98
}
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129
char *cmdline_filename;
130
ret = asprintf(&cmdline_filename, "/proc/%s/cmdline",
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proc_entry->d_name);
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char exe_target[sizeof(plymouthd_path)];
100
char *exe_link;
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ret = asprintf(&exe_link, "/proc/%s/exe", proc_entry->d_name);
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if(ret == -1){
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error_plus(0, errno, "asprintf");
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error(0, errno, "asprintf");
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return 0;
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}
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/* Open /proc/<pid>/cmdline */
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cl_fd = open(cmdline_filename, O_RDONLY);
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free(cmdline_filename);
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if(cl_fd == -1){
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struct stat exe_stat;
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ret = lstat(exe_link, &exe_stat);
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if(ret == -1){
110
free(exe_link);
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111
if(errno != ENOENT){
142
error_plus(0, errno, "open");
143
}
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return 0;
145
}
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char *cmdline = NULL;
148
{
149
size_t cmdline_len = 0;
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size_t cmdline_allocated = 0;
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char *tmp;
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const size_t blocksize = 1024;
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ssize_t sret;
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do {
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/* Allocate more space? */
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if(cmdline_len + blocksize + 1 > cmdline_allocated){
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tmp = realloc(cmdline, cmdline_allocated + blocksize + 1);
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if(tmp == NULL){
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error_plus(0, errno, "realloc");
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free(cmdline);
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close(cl_fd);
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return 0;
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}
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cmdline = tmp;
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cmdline_allocated += blocksize;
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}
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/* Read data */
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sret = read(cl_fd, cmdline + cmdline_len,
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cmdline_allocated - cmdline_len);
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if(sret == -1){
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error_plus(0, errno, "read");
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free(cmdline);
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close(cl_fd);
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return 0;
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}
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cmdline_len += (size_t)sret;
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} while(sret != 0);
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ret = close(cl_fd);
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if(ret == -1){
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error_plus(0, errno, "close");
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free(cmdline);
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return 0;
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}
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cmdline[cmdline_len] = '\0'; /* Make sure it is terminated */
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}
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/* we now have cmdline */
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/* get basename */
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char *cmdline_base = strrchr(cmdline, '/');
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if(cmdline_base != NULL){
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cmdline_base += 1; /* skip the slash */
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} else {
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cmdline_base = cmdline;
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}
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if(strcmp(cmdline_base, plymouth_name) != 0){
198
if(debug){
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fprintf(stderr, "\"%s\" is not \"%s\"\n", cmdline_base,
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plymouth_name);
201
}
202
free(cmdline);
203
return 0;
204
}
205
if(debug){
206
fprintf(stderr, "\"%s\" equals \"%s\"\n", cmdline_base,
207
plymouth_name);
208
}
209
free(cmdline);
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error(0, errno, "lstat");
113
}
114
return 0;
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}
116
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if(not S_ISLNK(exe_stat.st_mode)
118
or exe_stat.st_uid != 0
119
or exe_stat.st_gid != 0){
120
free(exe_link);
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return 0;
122
}
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ssize_t sret = readlink(exe_link, exe_target, sizeof(exe_target));
125
free(exe_link);
126
if((sret != (ssize_t)sizeof(plymouthd_path)-1) or
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(memcmp(plymouthd_path, exe_target,
128
sizeof(plymouthd_path)-1) != 0)){
129
return 0;
130
}
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131
return 1;
211
132
}
212
213
struct dirent **direntries = NULL;
133
134
struct dirent **direntries;
214
135
int ret;
215
136
ret = scandir("/proc", &direntries, is_plymouth, alphasort);
216
if(ret == -1){
217
error_plus(1, errno, "scandir");
218
}
219
{
220
int i = ret;
221
while(i--){
222
free(direntries[i]);
223
}
224
}
225
free(direntries);
226
return ret > 0;
137
if (ret == -1){
138
error(1, errno, "scandir");
139
}
140
if (ret < 0){
141
return 1;
142
} else {
143
return 0;
144
}
227
145
}
228
146
229
147
257
175
{ .name = NULL }
258
176
};
259
177
260
__attribute__((nonnull(3)))
261
178
error_t parse_opt (int key, char *arg, struct argp_state *state){
262
179
errno = 0;
263
180
switch (key){
299
216
case ENOMEM:
300
217
default:
301
218
errno = ret;
302
error_plus(0, errno, "argp_parse");
219
error(0, errno, "argp_parse");
303
220
return EX_OSERR;
304
221
case EINVAL:
305
222
return EX_USAGE;
310
227
fprintf(stderr, "Starting %s\n", argv[0]);
311
228
}
312
229
313
if(conflict_detection()){
230
if (conflict_detection()){
314
231
if(debug){
315
fprintf(stderr, "Stopping %s because of conflict\n", argv[0]);
232
fprintf(stderr, "Stopping %s because of conflict", argv[0]);
316
233
}
317
234
return EXIT_FAILURE;
318
235
}
323
240
324
241
if(tcgetattr(STDIN_FILENO, &t_old) != 0){
325
242
int e = errno;
326
error_plus(0, errno, "tcgetattr");
243
error(0, errno, "tcgetattr");
327
244
switch(e){
328
245
case EBADF:
329
246
case ENOTTY:
336
253
sigemptyset(&new_action.sa_mask);
337
254
ret = sigaddset(&new_action.sa_mask, SIGINT);
338
255
if(ret == -1){
339
error_plus(0, errno, "sigaddset");
256
error(0, errno, "sigaddset");
340
257
return EX_OSERR;
341
258
}
342
259
ret = sigaddset(&new_action.sa_mask, SIGHUP);
343
260
if(ret == -1){
344
error_plus(0, errno, "sigaddset");
261
error(0, errno, "sigaddset");
345
262
return EX_OSERR;
346
263
}
347
264
ret = sigaddset(&new_action.sa_mask, SIGTERM);
348
265
if(ret == -1){
349
error_plus(0, errno, "sigaddset");
266
error(0, errno, "sigaddset");
350
267
return EX_OSERR;
351
268
}
352
269
/* Need to check if the handler is SIG_IGN before handling:
355
272
*/
356
273
ret = sigaction(SIGINT, NULL, &old_action);
357
274
if(ret == -1){
358
error_plus(0, errno, "sigaction");
275
error(0, errno, "sigaction");
359
276
return EX_OSERR;
360
277
}
361
278
if(old_action.sa_handler != SIG_IGN){
362
279
ret = sigaction(SIGINT, &new_action, NULL);
363
280
if(ret == -1){
364
error_plus(0, errno, "sigaction");
281
error(0, errno, "sigaction");
365
282
return EX_OSERR;
366
283
}
367
284
}
368
285
ret = sigaction(SIGHUP, NULL, &old_action);
369
286
if(ret == -1){
370
error_plus(0, errno, "sigaction");
287
error(0, errno, "sigaction");
371
288
return EX_OSERR;
372
289
}
373
290
if(old_action.sa_handler != SIG_IGN){
374
291
ret = sigaction(SIGHUP, &new_action, NULL);
375
292
if(ret == -1){
376
error_plus(0, errno, "sigaction");
293
error(0, errno, "sigaction");
377
294
return EX_OSERR;
378
295
}
379
296
}
380
297
ret = sigaction(SIGTERM, NULL, &old_action);
381
298
if(ret == -1){
382
error_plus(0, errno, "sigaction");
299
error(0, errno, "sigaction");
383
300
return EX_OSERR;
384
301
}
385
302
if(old_action.sa_handler != SIG_IGN){
386
303
ret = sigaction(SIGTERM, &new_action, NULL);
387
304
if(ret == -1){
388
error_plus(0, errno, "sigaction");
305
error(0, errno, "sigaction");
389
306
return EX_OSERR;
390
307
}
391
308
}
399
316
t_new.c_lflag &= ~(tcflag_t)ECHO;
400
317
if(tcsetattr(STDIN_FILENO, TCSAFLUSH, &t_new) != 0){
401
318
int e = errno;
402
error_plus(0, errno, "tcsetattr-echo");
319
error(0, errno, "tcsetattr-echo");
403
320
switch(e){
404
321
case EBADF:
405
322
case ENOTTY:
469
386
sret = write(STDOUT_FILENO, buffer + written, n - written);
470
387
if(sret < 0){
471
388
int e = errno;
472
error_plus(0, errno, "write");
389
error(0, errno, "write");
473
390
switch(e){
474
391
case EBADF:
475
392
case EFAULT:
491
408
sret = close(STDOUT_FILENO);
492
409
if(sret == -1){
493
410
int e = errno;
494
error_plus(0, errno, "close");
411
error(0, errno, "close");
495
412
switch(e){
496
413
case EBADF:
497
414
status = EX_OSFILE;
507
424
if(sret < 0){
508
425
int e = errno;
509
426
if(errno != EINTR and not feof(stdin)){
510
error_plus(0, errno, "getline");
427
error(0, errno, "getline");
511
428
switch(e){
512
429
case EBADF:
513
430
status = EX_UNAVAILABLE;
514
break;
515
431
case EIO:
516
432
case EINVAL:
517
433
default:
521
437
break;
522
438
}
523
439
}
524
/* if(sret == 0), then the only sensible thing to do is to retry
525
to read from stdin */
440
/* if(sret == 0), then the only sensible thing to do is to retry to
441
read from stdin */
526
442
fputc('\n', stderr);
527
443
if(debug and not quit_now){
528
444
/* If quit_now is nonzero, we were interrupted by a signal, and
537
453
fprintf(stderr, "Restoring terminal attributes\n");
538
454
}
539
455
if(tcsetattr(STDIN_FILENO, TCSAFLUSH, &t_old) != 0){
540
error_plus(0, errno, "tcsetattr+echo");
456
error(0, errno, "tcsetattr+echo");
541
457
}
542
458
543
459
if(quit_now){
545
461
old_action.sa_handler = SIG_DFL;
546
462
ret = sigaction(signal_received, &old_action, NULL);
547
463
if(ret == -1){
548
error_plus(0, errno, "sigaction");
464
error(0, errno, "sigaction");
549
465
}
550
466
raise(signal_received);
551
467
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0