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Commit | Line | Data |
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7f4e0805 LP |
1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
2 | ||
3 | /*** | |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2010 Lennart Poettering | |
7 | ||
8 | systemd is free software; you can redistribute it and/or modify it | |
5430f7f2 LP |
9 | under the terms of the GNU Lesser General Public License as published by |
10 | the Free Software Foundation; either version 2.1 of the License, or | |
7f4e0805 LP |
11 | (at your option) any later version. |
12 | ||
13 | systemd 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 | |
5430f7f2 | 16 | Lesser General Public License for more details. |
7f4e0805 | 17 | |
5430f7f2 | 18 | You should have received a copy of the GNU Lesser General Public License |
7f4e0805 LP |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. |
20 | ***/ | |
00843602 | 21 | |
7f4e0805 LP |
22 | #include <errno.h> |
23 | #include <fcntl.h> | |
00843602 LP |
24 | #include <poll.h> |
25 | #include <stdbool.h> | |
7f4e0805 | 26 | #include <stddef.h> |
00843602 LP |
27 | #include <string.h> |
28 | #include <sys/inotify.h> | |
7f4e0805 | 29 | #include <sys/signalfd.h> |
00843602 LP |
30 | #include <sys/socket.h> |
31 | #include <sys/un.h> | |
32 | #include <termios.h> | |
33 | #include <unistd.h> | |
7f4e0805 | 34 | |
b5efdb8a | 35 | #include "alloc-util.h" |
3ffd4af2 LP |
36 | #include "ask-password-api.h" |
37 | #include "fd-util.h" | |
0d39fa9c | 38 | #include "fileio.h" |
6482f626 | 39 | #include "formats-util.h" |
c004493c | 40 | #include "io-util.h" |
e287086b | 41 | #include "missing.h" |
49e942b2 | 42 | #include "mkdir.h" |
3df3e884 | 43 | #include "random-util.h" |
24882e06 | 44 | #include "signal-util.h" |
00843602 | 45 | #include "socket-util.h" |
07630cea | 46 | #include "string-util.h" |
00843602 LP |
47 | #include "strv.h" |
48 | #include "terminal-util.h" | |
affb60b1 | 49 | #include "umask-util.h" |
00843602 | 50 | #include "util.h" |
7f4e0805 | 51 | |
e287086b LP |
52 | #define KEYRING_TIMEOUT_USEC ((5 * USEC_PER_MINUTE) / 2) |
53 | ||
54 | static int lookup_key(const char *keyname, key_serial_t *ret) { | |
55 | key_serial_t serial; | |
56 | ||
57 | assert(keyname); | |
58 | assert(ret); | |
59 | ||
60 | serial = request_key("user", keyname, NULL, 0); | |
61 | if (serial == -1) | |
62 | return -errno; | |
63 | ||
64 | *ret = serial; | |
65 | return 0; | |
66 | } | |
67 | ||
68 | static int retrieve_key(key_serial_t serial, char ***ret) { | |
69 | _cleanup_free_ char *p = NULL; | |
70 | long m = 100, n; | |
71 | char **l; | |
72 | ||
73 | assert(ret); | |
74 | ||
75 | for (;;) { | |
76 | p = new(char, m); | |
77 | if (!p) | |
78 | return -ENOMEM; | |
79 | ||
80 | n = keyctl(KEYCTL_READ, (unsigned long) serial, (unsigned long) p, (unsigned long) m, 0); | |
81 | if (n < 0) | |
82 | return -errno; | |
83 | ||
84 | if (n < m) | |
85 | break; | |
86 | ||
1602b008 | 87 | memory_erase(p, n); |
e287086b LP |
88 | free(p); |
89 | m *= 2; | |
90 | } | |
91 | ||
92 | l = strv_parse_nulstr(p, n); | |
93 | if (!l) | |
94 | return -ENOMEM; | |
95 | ||
1602b008 LP |
96 | memory_erase(p, n); |
97 | ||
e287086b LP |
98 | *ret = l; |
99 | return 0; | |
100 | } | |
101 | ||
102 | static int add_to_keyring(const char *keyname, AskPasswordFlags flags, char **passwords) { | |
ab84f5b9 | 103 | _cleanup_strv_free_erase_ char **l = NULL; |
e287086b LP |
104 | _cleanup_free_ char *p = NULL; |
105 | key_serial_t serial; | |
106 | size_t n; | |
107 | int r; | |
108 | ||
109 | assert(keyname); | |
110 | assert(passwords); | |
111 | ||
112 | if (!(flags & ASK_PASSWORD_PUSH_CACHE)) | |
113 | return 0; | |
114 | ||
115 | r = lookup_key(keyname, &serial); | |
116 | if (r >= 0) { | |
117 | r = retrieve_key(serial, &l); | |
118 | if (r < 0) | |
119 | return r; | |
120 | } else if (r != -ENOKEY) | |
121 | return r; | |
122 | ||
123 | r = strv_extend_strv(&l, passwords, true); | |
124 | if (r <= 0) | |
125 | return r; | |
126 | ||
127 | r = strv_make_nulstr(l, &p, &n); | |
128 | if (r < 0) | |
129 | return r; | |
130 | ||
131 | /* Truncate trailing NUL */ | |
132 | assert(n > 0); | |
133 | assert(p[n-1] == 0); | |
134 | ||
135 | serial = add_key("user", keyname, p, n-1, KEY_SPEC_USER_KEYRING); | |
1602b008 | 136 | memory_erase(p, n); |
e287086b LP |
137 | if (serial == -1) |
138 | return -errno; | |
139 | ||
140 | if (keyctl(KEYCTL_SET_TIMEOUT, | |
141 | (unsigned long) serial, | |
142 | (unsigned long) DIV_ROUND_UP(KEYRING_TIMEOUT_USEC, USEC_PER_SEC), 0, 0) < 0) | |
143 | log_debug_errno(errno, "Failed to adjust timeout: %m"); | |
144 | ||
145 | log_debug("Added key to keyring as %" PRIi32 ".", serial); | |
146 | ||
147 | return 1; | |
148 | } | |
149 | ||
150 | static int add_to_keyring_and_log(const char *keyname, AskPasswordFlags flags, char **passwords) { | |
151 | int r; | |
152 | ||
153 | assert(keyname); | |
154 | assert(passwords); | |
155 | ||
156 | r = add_to_keyring(keyname, flags, passwords); | |
157 | if (r < 0) | |
158 | return log_debug_errno(r, "Failed to add password to keyring: %m"); | |
159 | ||
160 | return 0; | |
161 | } | |
162 | ||
163 | int ask_password_keyring(const char *keyname, AskPasswordFlags flags, char ***ret) { | |
164 | ||
165 | key_serial_t serial; | |
166 | int r; | |
167 | ||
168 | assert(keyname); | |
169 | assert(ret); | |
170 | ||
171 | if (!(flags & ASK_PASSWORD_ACCEPT_CACHED)) | |
172 | return -EUNATCH; | |
173 | ||
174 | r = lookup_key(keyname, &serial); | |
175 | if (r == -ENOSYS) /* when retrieving the distinction doesn't matter */ | |
176 | return -ENOKEY; | |
177 | if (r < 0) | |
178 | return r; | |
179 | ||
180 | return retrieve_key(serial, ret); | |
181 | } | |
182 | ||
58fc840b LP |
183 | static void backspace_chars(int ttyfd, size_t p) { |
184 | ||
185 | if (ttyfd < 0) | |
186 | return; | |
187 | ||
188 | while (p > 0) { | |
189 | p--; | |
190 | ||
191 | loop_write(ttyfd, "\b \b", 3, false); | |
192 | } | |
193 | } | |
194 | ||
7f4e0805 LP |
195 | int ask_password_tty( |
196 | const char *message, | |
e287086b | 197 | const char *keyname, |
7f4e0805 | 198 | usec_t until, |
e287086b | 199 | AskPasswordFlags flags, |
7f4e0805 | 200 | const char *flag_file, |
e287086b | 201 | char **ret) { |
7f4e0805 LP |
202 | |
203 | struct termios old_termios, new_termios; | |
981e4cd3 | 204 | char passphrase[LINE_MAX], *x; |
7f4e0805 | 205 | size_t p = 0; |
981e4cd3 LP |
206 | int r; |
207 | _cleanup_close_ int ttyfd = -1, notify = -1; | |
7f4e0805 LP |
208 | struct pollfd pollfd[2]; |
209 | bool reset_tty = false; | |
441dfe09 | 210 | bool dirty = false; |
7f4e0805 LP |
211 | enum { |
212 | POLL_TTY, | |
213 | POLL_INOTIFY | |
214 | }; | |
215 | ||
e287086b LP |
216 | assert(ret); |
217 | ||
218 | if (flags & ASK_PASSWORD_NO_TTY) | |
219 | return -EUNATCH; | |
220 | ||
221 | if (!message) | |
222 | message = "Password:"; | |
7f4e0805 LP |
223 | |
224 | if (flag_file) { | |
981e4cd3 LP |
225 | notify = inotify_init1(IN_CLOEXEC|IN_NONBLOCK); |
226 | if (notify < 0) { | |
7f4e0805 LP |
227 | r = -errno; |
228 | goto finish; | |
229 | } | |
230 | ||
231 | if (inotify_add_watch(notify, flag_file, IN_ATTRIB /* for the link count */) < 0) { | |
232 | r = -errno; | |
233 | goto finish; | |
234 | } | |
235 | } | |
236 | ||
981e4cd3 LP |
237 | ttyfd = open("/dev/tty", O_RDWR|O_NOCTTY|O_CLOEXEC); |
238 | if (ttyfd >= 0) { | |
7f4e0805 LP |
239 | |
240 | if (tcgetattr(ttyfd, &old_termios) < 0) { | |
241 | r = -errno; | |
242 | goto finish; | |
243 | } | |
244 | ||
00843602 | 245 | loop_write(ttyfd, ANSI_HIGHLIGHT, strlen(ANSI_HIGHLIGHT), false); |
7f4e0805 | 246 | loop_write(ttyfd, message, strlen(message), false); |
bd1db33f | 247 | loop_write(ttyfd, " ", 1, false); |
00843602 | 248 | loop_write(ttyfd, ANSI_NORMAL, strlen(ANSI_NORMAL), false); |
7f4e0805 LP |
249 | |
250 | new_termios = old_termios; | |
251 | new_termios.c_lflag &= ~(ICANON|ECHO); | |
252 | new_termios.c_cc[VMIN] = 1; | |
253 | new_termios.c_cc[VTIME] = 0; | |
254 | ||
255 | if (tcsetattr(ttyfd, TCSADRAIN, &new_termios) < 0) { | |
256 | r = -errno; | |
257 | goto finish; | |
258 | } | |
259 | ||
260 | reset_tty = true; | |
261 | } | |
262 | ||
263 | zero(pollfd); | |
7f4e0805 LP |
264 | pollfd[POLL_TTY].fd = ttyfd >= 0 ? ttyfd : STDIN_FILENO; |
265 | pollfd[POLL_TTY].events = POLLIN; | |
266 | pollfd[POLL_INOTIFY].fd = notify; | |
267 | pollfd[POLL_INOTIFY].events = POLLIN; | |
268 | ||
269 | for (;;) { | |
270 | char c; | |
271 | int sleep_for = -1, k; | |
272 | ssize_t n; | |
273 | ||
274 | if (until > 0) { | |
275 | usec_t y; | |
276 | ||
277 | y = now(CLOCK_MONOTONIC); | |
278 | ||
279 | if (y > until) { | |
7ded2e28 | 280 | r = -ETIME; |
7f4e0805 LP |
281 | goto finish; |
282 | } | |
283 | ||
284 | sleep_for = (int) ((until - y) / USEC_PER_MSEC); | |
285 | } | |
286 | ||
287 | if (flag_file) | |
288 | if (access(flag_file, F_OK) < 0) { | |
289 | r = -errno; | |
290 | goto finish; | |
291 | } | |
292 | ||
e287086b | 293 | k = poll(pollfd, notify >= 0 ? 2 : 1, sleep_for); |
981e4cd3 | 294 | if (k < 0) { |
7f4e0805 LP |
295 | if (errno == EINTR) |
296 | continue; | |
297 | ||
298 | r = -errno; | |
299 | goto finish; | |
300 | } else if (k == 0) { | |
ccc80078 | 301 | r = -ETIME; |
7f4e0805 LP |
302 | goto finish; |
303 | } | |
304 | ||
e287086b | 305 | if (notify >= 0 && pollfd[POLL_INOTIFY].revents != 0) |
7f4e0805 LP |
306 | flush_fd(notify); |
307 | ||
308 | if (pollfd[POLL_TTY].revents == 0) | |
309 | continue; | |
310 | ||
981e4cd3 LP |
311 | n = read(ttyfd >= 0 ? ttyfd : STDIN_FILENO, &c, 1); |
312 | if (n < 0) { | |
7f4e0805 LP |
313 | if (errno == EINTR || errno == EAGAIN) |
314 | continue; | |
315 | ||
316 | r = -errno; | |
317 | goto finish; | |
318 | ||
319 | } else if (n == 0) | |
320 | break; | |
321 | ||
322 | if (c == '\n') | |
323 | break; | |
58fc840b | 324 | else if (c == 21) { /* C-u */ |
7f4e0805 | 325 | |
e287086b | 326 | if (!(flags & ASK_PASSWORD_SILENT)) |
58fc840b LP |
327 | backspace_chars(ttyfd, p); |
328 | p = 0; | |
7f4e0805 LP |
329 | |
330 | } else if (c == '\b' || c == 127) { | |
58fc840b LP |
331 | |
332 | if (p > 0) { | |
333 | ||
e287086b | 334 | if (!(flags & ASK_PASSWORD_SILENT)) |
58fc840b LP |
335 | backspace_chars(ttyfd, 1); |
336 | ||
7f4e0805 | 337 | p--; |
e287086b | 338 | } else if (!dirty && !(flags & ASK_PASSWORD_SILENT)) { |
441dfe09 | 339 | |
e287086b | 340 | flags |= ASK_PASSWORD_SILENT; |
441dfe09 LP |
341 | |
342 | /* There are two ways to enter silent | |
343 | * mode. Either by pressing backspace | |
e287086b LP |
344 | * as first key (and only as first |
345 | * key), or ... */ | |
441dfe09 LP |
346 | if (ttyfd >= 0) |
347 | loop_write(ttyfd, "(no echo) ", 10, false); | |
348 | ||
58fc840b LP |
349 | } else if (ttyfd >= 0) |
350 | loop_write(ttyfd, "\a", 1, false); | |
7f4e0805 | 351 | |
e287086b | 352 | } else if (c == '\t' && !(flags & ASK_PASSWORD_SILENT)) { |
58fc840b LP |
353 | |
354 | backspace_chars(ttyfd, p); | |
e287086b | 355 | flags |= ASK_PASSWORD_SILENT; |
58fc840b | 356 | |
441dfe09 LP |
357 | /* ... or by pressing TAB at any time. */ |
358 | ||
58fc840b LP |
359 | if (ttyfd >= 0) |
360 | loop_write(ttyfd, "(no echo) ", 10, false); | |
7f4e0805 | 361 | } else { |
036eeac5 LP |
362 | if (p >= sizeof(passphrase)-1) { |
363 | loop_write(ttyfd, "\a", 1, false); | |
364 | continue; | |
365 | } | |
366 | ||
7f4e0805 LP |
367 | passphrase[p++] = c; |
368 | ||
e287086b LP |
369 | if (!(flags & ASK_PASSWORD_SILENT) && ttyfd >= 0) |
370 | loop_write(ttyfd, (flags & ASK_PASSWORD_ECHO) ? &c : "*", 1, false); | |
441dfe09 LP |
371 | |
372 | dirty = true; | |
7f4e0805 | 373 | } |
1602b008 LP |
374 | |
375 | c = 'x'; | |
7f4e0805 LP |
376 | } |
377 | ||
981e4cd3 | 378 | x = strndup(passphrase, p); |
1602b008 | 379 | memory_erase(passphrase, p); |
981e4cd3 | 380 | if (!x) { |
7f4e0805 LP |
381 | r = -ENOMEM; |
382 | goto finish; | |
383 | } | |
384 | ||
e287086b LP |
385 | if (keyname) |
386 | (void) add_to_keyring_and_log(keyname, flags, STRV_MAKE(x)); | |
387 | ||
388 | *ret = x; | |
7f4e0805 LP |
389 | r = 0; |
390 | ||
391 | finish: | |
981e4cd3 LP |
392 | if (ttyfd >= 0 && reset_tty) { |
393 | loop_write(ttyfd, "\n", 1, false); | |
394 | tcsetattr(ttyfd, TCSADRAIN, &old_termios); | |
7f4e0805 LP |
395 | } |
396 | ||
397 | return r; | |
398 | } | |
399 | ||
400 | static int create_socket(char **name) { | |
00843602 | 401 | union sockaddr_union sa = { |
b92bea5d ZJS |
402 | .un.sun_family = AF_UNIX, |
403 | }; | |
00843602 LP |
404 | _cleanup_close_ int fd = -1; |
405 | static const int one = 1; | |
7f4e0805 | 406 | char *c; |
00843602 | 407 | int r; |
7f4e0805 LP |
408 | |
409 | assert(name); | |
410 | ||
e62d8c39 | 411 | fd = socket(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0); |
4a62c710 | 412 | if (fd < 0) |
00843602 | 413 | return -errno; |
7f4e0805 | 414 | |
9bf3b535 | 415 | snprintf(sa.un.sun_path, sizeof(sa.un.sun_path)-1, "/run/systemd/ask-password/sck.%" PRIx64, random_u64()); |
7f4e0805 | 416 | |
5c0d398d | 417 | RUN_WITH_UMASK(0177) { |
00843602 LP |
418 | if (bind(fd, &sa.sa, offsetof(struct sockaddr_un, sun_path) + strlen(sa.un.sun_path)) < 0) |
419 | return -errno; | |
5c0d398d | 420 | } |
1d6702e8 | 421 | |
00843602 LP |
422 | if (setsockopt(fd, SOL_SOCKET, SO_PASSCRED, &one, sizeof(one)) < 0) |
423 | return -errno; | |
7f4e0805 | 424 | |
e62d8c39 | 425 | c = strdup(sa.un.sun_path); |
00843602 LP |
426 | if (!c) |
427 | return -ENOMEM; | |
7f4e0805 LP |
428 | |
429 | *name = c; | |
7f4e0805 | 430 | |
00843602 LP |
431 | r = fd; |
432 | fd = -1; | |
7f4e0805 LP |
433 | |
434 | return r; | |
435 | } | |
436 | ||
7f4e0805 LP |
437 | int ask_password_agent( |
438 | const char *message, | |
439 | const char *icon, | |
9fa1de96 | 440 | const char *id, |
e287086b | 441 | const char *keyname, |
7f4e0805 | 442 | usec_t until, |
e287086b LP |
443 | AskPasswordFlags flags, |
444 | char ***ret) { | |
7f4e0805 LP |
445 | |
446 | enum { | |
447 | FD_SOCKET, | |
448 | FD_SIGNAL, | |
449 | _FD_MAX | |
450 | }; | |
451 | ||
e287086b | 452 | _cleanup_close_ int socket_fd = -1, signal_fd = -1, fd = -1; |
2b583ce6 | 453 | char temp[] = "/run/systemd/ask-password/tmp.XXXXXX"; |
7f4e0805 | 454 | char final[sizeof(temp)] = ""; |
981e4cd3 | 455 | _cleanup_free_ char *socket_name = NULL; |
e287086b LP |
456 | _cleanup_strv_free_ char **l = NULL; |
457 | _cleanup_fclose_ FILE *f = NULL; | |
7f4e0805 | 458 | struct pollfd pollfd[_FD_MAX]; |
e287086b | 459 | sigset_t mask, oldmask; |
981e4cd3 | 460 | int r; |
7f4e0805 | 461 | |
e287086b | 462 | assert(ret); |
21bc923a | 463 | |
e287086b LP |
464 | if (flags & ASK_PASSWORD_NO_AGENT) |
465 | return -EUNATCH; | |
00843602 | 466 | |
72c0a2c2 LP |
467 | assert_se(sigemptyset(&mask) >= 0); |
468 | assert_se(sigset_add_many(&mask, SIGINT, SIGTERM, -1) >= 0); | |
469 | assert_se(sigprocmask(SIG_BLOCK, &mask, &oldmask) >= 0); | |
f9b72cd8 | 470 | |
00843602 | 471 | (void) mkdir_p_label("/run/systemd/ask-password", 0755); |
7f4e0805 | 472 | |
2d5bdf5b | 473 | fd = mkostemp_safe(temp, O_WRONLY|O_CLOEXEC); |
1d6702e8 | 474 | if (fd < 0) { |
709f6e46 | 475 | r = fd; |
7f4e0805 LP |
476 | goto finish; |
477 | } | |
478 | ||
00843602 | 479 | (void) fchmod(fd, 0644); |
7f4e0805 | 480 | |
981e4cd3 LP |
481 | f = fdopen(fd, "w"); |
482 | if (!f) { | |
00843602 | 483 | r = -errno; |
7f4e0805 LP |
484 | goto finish; |
485 | } | |
486 | ||
487 | fd = -1; | |
488 | ||
981e4cd3 LP |
489 | signal_fd = signalfd(-1, &mask, SFD_NONBLOCK|SFD_CLOEXEC); |
490 | if (signal_fd < 0) { | |
00843602 | 491 | r = -errno; |
7f4e0805 LP |
492 | goto finish; |
493 | } | |
494 | ||
981e4cd3 LP |
495 | socket_fd = create_socket(&socket_name); |
496 | if (socket_fd < 0) { | |
7f4e0805 LP |
497 | r = socket_fd; |
498 | goto finish; | |
499 | } | |
500 | ||
501 | fprintf(f, | |
502 | "[Ask]\n" | |
de0671ee | 503 | "PID="PID_FMT"\n" |
7f4e0805 | 504 | "Socket=%s\n" |
21bc923a | 505 | "AcceptCached=%i\n" |
64845bdc | 506 | "Echo=%i\n" |
de0671ee ZJS |
507 | "NotAfter="USEC_FMT"\n", |
508 | getpid(), | |
7f4e0805 | 509 | socket_name, |
e287086b LP |
510 | (flags & ASK_PASSWORD_ACCEPT_CACHED) ? 1 : 0, |
511 | (flags & ASK_PASSWORD_ECHO) ? 1 : 0, | |
de0671ee | 512 | until); |
7f4e0805 LP |
513 | |
514 | if (message) | |
515 | fprintf(f, "Message=%s\n", message); | |
516 | ||
517 | if (icon) | |
518 | fprintf(f, "Icon=%s\n", icon); | |
519 | ||
9fa1de96 DH |
520 | if (id) |
521 | fprintf(f, "Id=%s\n", id); | |
522 | ||
dacd6cee | 523 | r = fflush_and_check(f); |
00843602 | 524 | if (r < 0) |
7f4e0805 | 525 | goto finish; |
7f4e0805 LP |
526 | |
527 | memcpy(final, temp, sizeof(temp)); | |
528 | ||
529 | final[sizeof(final)-11] = 'a'; | |
530 | final[sizeof(final)-10] = 's'; | |
531 | final[sizeof(final)-9] = 'k'; | |
532 | ||
533 | if (rename(temp, final) < 0) { | |
00843602 | 534 | r = -errno; |
7f4e0805 LP |
535 | goto finish; |
536 | } | |
537 | ||
538 | zero(pollfd); | |
539 | pollfd[FD_SOCKET].fd = socket_fd; | |
540 | pollfd[FD_SOCKET].events = POLLIN; | |
541 | pollfd[FD_SIGNAL].fd = signal_fd; | |
542 | pollfd[FD_SIGNAL].events = POLLIN; | |
543 | ||
544 | for (;;) { | |
545 | char passphrase[LINE_MAX+1]; | |
546 | struct msghdr msghdr; | |
547 | struct iovec iovec; | |
548 | struct ucred *ucred; | |
549 | union { | |
550 | struct cmsghdr cmsghdr; | |
551 | uint8_t buf[CMSG_SPACE(sizeof(struct ucred))]; | |
552 | } control; | |
553 | ssize_t n; | |
554 | int k; | |
555 | usec_t t; | |
556 | ||
557 | t = now(CLOCK_MONOTONIC); | |
558 | ||
7dcda352 | 559 | if (until > 0 && until <= t) { |
7f4e0805 LP |
560 | r = -ETIME; |
561 | goto finish; | |
562 | } | |
563 | ||
981e4cd3 LP |
564 | k = poll(pollfd, _FD_MAX, until > 0 ? (int) ((until-t)/USEC_PER_MSEC) : -1); |
565 | if (k < 0) { | |
7f4e0805 LP |
566 | if (errno == EINTR) |
567 | continue; | |
568 | ||
00843602 | 569 | r = -errno; |
7f4e0805 LP |
570 | goto finish; |
571 | } | |
572 | ||
573 | if (k <= 0) { | |
7f4e0805 LP |
574 | r = -ETIME; |
575 | goto finish; | |
576 | } | |
577 | ||
21bc923a LP |
578 | if (pollfd[FD_SIGNAL].revents & POLLIN) { |
579 | r = -EINTR; | |
580 | goto finish; | |
581 | } | |
7f4e0805 LP |
582 | |
583 | if (pollfd[FD_SOCKET].revents != POLLIN) { | |
7f4e0805 LP |
584 | r = -EIO; |
585 | goto finish; | |
586 | } | |
587 | ||
588 | zero(iovec); | |
589 | iovec.iov_base = passphrase; | |
21bc923a | 590 | iovec.iov_len = sizeof(passphrase); |
7f4e0805 LP |
591 | |
592 | zero(control); | |
593 | zero(msghdr); | |
594 | msghdr.msg_iov = &iovec; | |
595 | msghdr.msg_iovlen = 1; | |
596 | msghdr.msg_control = &control; | |
597 | msghdr.msg_controllen = sizeof(control); | |
598 | ||
981e4cd3 LP |
599 | n = recvmsg(socket_fd, &msghdr, 0); |
600 | if (n < 0) { | |
7f4e0805 LP |
601 | if (errno == EAGAIN || |
602 | errno == EINTR) | |
603 | continue; | |
604 | ||
00843602 | 605 | r = -errno; |
7f4e0805 LP |
606 | goto finish; |
607 | } | |
608 | ||
1c8da044 LP |
609 | cmsg_close_all(&msghdr); |
610 | ||
7f4e0805 | 611 | if (n <= 0) { |
00843602 | 612 | log_debug("Message too short"); |
7f4e0805 LP |
613 | continue; |
614 | } | |
615 | ||
616 | if (msghdr.msg_controllen < CMSG_LEN(sizeof(struct ucred)) || | |
617 | control.cmsghdr.cmsg_level != SOL_SOCKET || | |
618 | control.cmsghdr.cmsg_type != SCM_CREDENTIALS || | |
619 | control.cmsghdr.cmsg_len != CMSG_LEN(sizeof(struct ucred))) { | |
00843602 | 620 | log_debug("Received message without credentials. Ignoring."); |
7f4e0805 LP |
621 | continue; |
622 | } | |
623 | ||
624 | ucred = (struct ucred*) CMSG_DATA(&control.cmsghdr); | |
625 | if (ucred->uid != 0) { | |
00843602 | 626 | log_debug("Got request from unprivileged user. Ignoring."); |
7f4e0805 LP |
627 | continue; |
628 | } | |
629 | ||
630 | if (passphrase[0] == '+') { | |
e287086b | 631 | /* An empty message refers to the empty password */ |
8254a475 LP |
632 | if (n == 1) |
633 | l = strv_new("", NULL); | |
634 | else | |
635 | l = strv_parse_nulstr(passphrase+1, n-1); | |
1602b008 | 636 | memory_erase(passphrase, n); |
8254a475 | 637 | if (!l) { |
7f4e0805 LP |
638 | r = -ENOMEM; |
639 | goto finish; | |
640 | } | |
641 | ||
21bc923a | 642 | if (strv_length(l) <= 0) { |
e287086b | 643 | l = strv_free(l); |
00843602 | 644 | log_debug("Invalid packet"); |
21bc923a LP |
645 | continue; |
646 | } | |
647 | ||
e287086b LP |
648 | break; |
649 | } | |
21bc923a | 650 | |
e287086b | 651 | if (passphrase[0] == '-') { |
7f4e0805 LP |
652 | r = -ECANCELED; |
653 | goto finish; | |
7f4e0805 LP |
654 | } |
655 | ||
e287086b | 656 | log_debug("Invalid packet"); |
7f4e0805 LP |
657 | } |
658 | ||
e287086b LP |
659 | if (keyname) |
660 | (void) add_to_keyring_and_log(keyname, flags, l); | |
661 | ||
662 | *ret = l; | |
663 | l = NULL; | |
7f4e0805 LP |
664 | r = 0; |
665 | ||
666 | finish: | |
981e4cd3 | 667 | if (socket_name) |
00843602 | 668 | (void) unlink(socket_name); |
7f4e0805 | 669 | |
00843602 | 670 | (void) unlink(temp); |
7f4e0805 LP |
671 | |
672 | if (final[0]) | |
00843602 | 673 | (void) unlink(final); |
7f4e0805 | 674 | |
f9b72cd8 | 675 | assert_se(sigprocmask(SIG_SETMASK, &oldmask, NULL) == 0); |
7f4e0805 LP |
676 | return r; |
677 | } | |
260ab287 | 678 | |
00843602 LP |
679 | int ask_password_auto( |
680 | const char *message, | |
681 | const char *icon, | |
682 | const char *id, | |
e287086b | 683 | const char *keyname, |
00843602 | 684 | usec_t until, |
e287086b LP |
685 | AskPasswordFlags flags, |
686 | char ***ret) { | |
00843602 LP |
687 | |
688 | int r; | |
689 | ||
e287086b | 690 | assert(ret); |
21bc923a | 691 | |
e287086b LP |
692 | if ((flags & ASK_PASSWORD_ACCEPT_CACHED) && keyname) { |
693 | r = ask_password_keyring(keyname, flags, ret); | |
694 | if (r != -ENOKEY) | |
695 | return r; | |
696 | } | |
697 | ||
698 | if (!(flags & ASK_PASSWORD_NO_TTY) && isatty(STDIN_FILENO)) { | |
21bc923a LP |
699 | char *s = NULL, **l = NULL; |
700 | ||
e287086b | 701 | r = ask_password_tty(message, keyname, until, flags, NULL, &s); |
981e4cd3 | 702 | if (r < 0) |
21bc923a LP |
703 | return r; |
704 | ||
1602b008 LP |
705 | r = strv_push(&l, s); |
706 | if (r < 0) { | |
707 | string_erase(s); | |
708 | free(s); | |
00843602 | 709 | return -ENOMEM; |
1602b008 | 710 | } |
21bc923a | 711 | |
e287086b | 712 | *ret = l; |
00843602 LP |
713 | return 0; |
714 | } | |
715 | ||
e287086b LP |
716 | if (!(flags & ASK_PASSWORD_NO_AGENT)) |
717 | return ask_password_agent(message, icon, id, keyname, until, flags, ret); | |
718 | ||
719 | return -EUNATCH; | |
260ab287 | 720 | } |