069c185c |
1 | /* -*-c-*- |
2 | * |
9d23d982 |
3 | * $Id: pixie.c,v 1.8 2001/01/25 22:19:31 mdw Exp $ |
069c185c |
4 | * |
5 | * Passphrase pixie for Catacomb |
6 | * |
7 | * (c) 1999 Straylight/Edgeware |
8 | */ |
9 | |
10 | /*----- Licensing notice --------------------------------------------------* |
11 | * |
12 | * This file is part of Catacomb. |
13 | * |
14 | * Catacomb is free software; you can redistribute it and/or modify |
15 | * it under the terms of the GNU Library General Public License as |
16 | * published by the Free Software Foundation; either version 2 of the |
17 | * License, or (at your option) any later version. |
18 | * |
19 | * Catacomb is distributed in the hope that it will be useful, |
20 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
21 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
22 | * GNU Library General Public License for more details. |
23 | * |
24 | * You should have received a copy of the GNU Library General Public |
25 | * License along with Catacomb; if not, write to the Free |
26 | * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, |
27 | * MA 02111-1307, USA. |
28 | */ |
29 | |
30 | /*----- Revision history --------------------------------------------------* |
31 | * |
32 | * $Log: pixie.c,v $ |
9d23d982 |
33 | * Revision 1.8 2001/01/25 22:19:31 mdw |
34 | * Make flags be unsigned. |
35 | * |
16efd15b |
36 | * Revision 1.7 2000/12/06 20:33:27 mdw |
37 | * Make flags be macros rather than enumerations, to ensure that they're |
38 | * unsigned. |
39 | * |
4933a180 |
40 | * Revision 1.6 2000/10/08 12:06:46 mdw |
41 | * Change size passed to socket function to be a @size_t@. Insert missing |
42 | * type name for flag declaration. |
43 | * |
4cb04adb |
44 | * Revision 1.5 2000/07/29 22:05:22 mdw |
45 | * Miscellaneous tidyings: |
46 | * |
47 | * * Change the timeout to something more appropriate for real use. |
48 | * |
49 | * * Check assumptions about object types when binding the socket. In |
50 | * particular, don't zap the socket if it's really something else. |
51 | * |
52 | * * In @p_request@, return a failure if the shell command returned |
53 | * nonzero. Fix a bug in @p_get@ which incorrectly passes on a success |
54 | * code when this happens. |
55 | * |
56 | * * Dispose of the locked memory in client mode to avoid being |
57 | * antisocial. |
58 | * |
59 | * * Also in client mode, don't report closure from the server if we're |
60 | * running noninteractively. |
61 | * |
62 | * * Insert a missing option letter into the usage string. |
63 | * |
64 | * * Change to the root directory after forking in daemon mode. |
65 | * |
6a2d21e4 |
66 | * Revision 1.4 2000/06/17 11:50:53 mdw |
67 | * New pixie protocol allowing application to request passphrases and send |
68 | * them to the pixie. Use the secure arena interface for the input |
69 | * buffer. Extend the input buffer. Other minor fixes. |
70 | * |
2b2d07ca |
71 | * Revision 1.3 1999/12/22 22:14:40 mdw |
72 | * Only produce initialization message if verbose. |
73 | * |
52b8f75d |
74 | * Revision 1.2 1999/12/22 22:13:42 mdw |
75 | * Fix bug in passphrase flushing loop. |
76 | * |
069c185c |
77 | * Revision 1.1 1999/12/22 15:58:41 mdw |
78 | * Passphrase pixie support. |
79 | * |
80 | */ |
81 | |
82 | /*----- Header files ------------------------------------------------------*/ |
83 | |
84 | #include "config.h" |
85 | |
86 | #include <assert.h> |
87 | #include <ctype.h> |
88 | #include <errno.h> |
89 | #include <signal.h> |
90 | #include <stdarg.h> |
91 | #include <stddef.h> |
92 | #include <stdio.h> |
93 | #include <stdlib.h> |
94 | #include <string.h> |
95 | #include <time.h> |
96 | |
97 | #include <sys/types.h> |
98 | #include <sys/time.h> |
99 | #include <unistd.h> |
100 | #include <sys/stat.h> |
101 | #include <sys/wait.h> |
102 | #include <pwd.h> |
103 | #include <fcntl.h> |
104 | #include <sys/ioctl.h> |
105 | #include <termios.h> |
106 | #include <syslog.h> |
107 | |
108 | #include <sys/socket.h> |
109 | #include <sys/un.h> |
110 | |
111 | #include <mLib/alloc.h> |
112 | #include <mLib/dstr.h> |
113 | #include <mLib/fdflags.h> |
114 | #include <mLib/mdwopt.h> |
115 | #include <mLib/quis.h> |
116 | #include <mLib/report.h> |
117 | #include <mLib/sel.h> |
118 | #include <mLib/selbuf.h> |
119 | #include <mLib/sig.h> |
120 | #include <mLib/str.h> |
121 | #include <mLib/sub.h> |
122 | #include <mLib/tv.h> |
123 | |
6a2d21e4 |
124 | #include "arena.h" |
069c185c |
125 | #include "lmem.h" |
126 | #include "passphrase.h" |
127 | #include "pixie.h" |
128 | |
129 | /*----- Static variables --------------------------------------------------*/ |
130 | |
4cb04adb |
131 | static unsigned long timeout = 900; |
069c185c |
132 | static sel_state sel; |
133 | static unsigned verbose = 1; |
134 | static const char *command = 0; |
135 | static lmem lm; |
136 | static unsigned flags = 0; |
137 | |
16efd15b |
138 | #define F_SYSLOG 1u |
139 | #define F_FETCH 2u |
069c185c |
140 | |
141 | /*----- Event logging -----------------------------------------------------*/ |
142 | |
143 | /* --- @log@ --- * |
144 | * |
145 | * Arguments: @const char *p@ = @printf@-style format string |
146 | * @...@ = extra arguments to fill in |
147 | * |
148 | * Returns: --- |
149 | * |
150 | * Use: Writes out a timestamped log message. |
151 | */ |
152 | |
153 | static void log(const char *p, ...) |
154 | { |
155 | dstr d = DSTR_INIT; |
156 | va_list ap; |
157 | |
158 | if (!(flags & F_SYSLOG)) { |
159 | time_t t = time(0); |
160 | struct tm *tm = localtime(&t); |
161 | DENSURE(&d, 64); |
162 | d.len += strftime(d.buf, d.sz, "%Y-%m-%d %H:%M:%S ", tm); |
163 | } |
164 | va_start(ap, p); |
165 | dstr_vputf(&d, p, ap); |
166 | va_end(ap); |
167 | |
168 | if (flags & F_SYSLOG) |
169 | syslog(LOG_NOTICE, "%s", d.buf); |
170 | else { |
171 | DPUTC(&d, '\n'); |
172 | dstr_write(&d, stderr); |
173 | } |
174 | DDESTROY(&d); |
175 | } |
176 | |
177 | /*----- Passphrase management ---------------------------------------------*/ |
178 | |
179 | /* --- Data structures --- */ |
180 | |
181 | typedef struct phrase { |
182 | struct phrase *next; |
183 | struct phrase *prev; |
184 | char *tag; |
185 | char *p; |
186 | unsigned long t; |
187 | sel_timer timer; |
188 | unsigned f; |
189 | } phrase; |
190 | |
191 | /* --- Variables --- */ |
192 | |
193 | #define P_ROOT ((phrase *)&p_root) |
194 | static struct { phrase *next; phrase *prev; } p_root = { P_ROOT, P_ROOT }; |
195 | |
196 | /* --- @p_free@ --- * |
197 | * |
198 | * Arguments: @phrase *p@ = pointer to phrase block |
199 | * |
200 | * Returns: --- |
201 | * |
202 | * Use: Frees a phrase block. |
203 | */ |
204 | |
205 | static void p_free(phrase *p) |
206 | { |
207 | if (p->t) |
208 | sel_rmtimer(&p->timer); |
209 | free(p->tag); |
210 | l_free(&lm, p->p); |
211 | p->next->prev = p->prev; |
212 | p->prev->next = p->next; |
213 | DESTROY(p); |
214 | } |
215 | |
216 | /* --- @p_timer@ --- * |
217 | * |
218 | * Arguments: @struct timeval *tv@ = current time |
219 | * @void *p@ = pointer to phrase |
220 | * |
221 | * Returns: --- |
222 | * |
223 | * Use: Expires a passphrase. |
224 | */ |
225 | |
226 | static void p_timer(struct timeval *tv, void *p) |
227 | { |
228 | phrase *pp = p; |
229 | if (verbose) |
230 | log("expiring passphrase `%s'", pp->tag); |
231 | p_free(pp); |
232 | } |
233 | |
234 | /* --- @p_alloc@ --- * |
235 | * |
236 | * Arguments: @size_t sz@ = amount of memory required |
237 | * |
238 | * Returns: Pointer to allocated memory, or null. |
239 | * |
240 | * Use: Allocates some locked memory, flushing old passphrases if |
241 | * there's not enough space. |
242 | */ |
243 | |
244 | static void *p_alloc(size_t sz) |
245 | { |
246 | for (;;) { |
247 | char *p; |
248 | if ((p = l_alloc(&lm, sz)) != 0) |
249 | return (p); |
250 | if (P_ROOT->next == P_ROOT) |
251 | return (0); |
252 | if (verbose) { |
253 | log("flushing passphrase `%s' to free up needed space", |
254 | P_ROOT->next->tag); |
255 | } |
256 | p_free(P_ROOT->next); |
257 | } |
258 | } |
259 | |
260 | /* --- @p_find@ --- * |
261 | * |
262 | * Arguments: @const char *tag@ = pointer to tag to find |
263 | * |
264 | * Returns: Pointer to passphrase block, or null. |
265 | * |
266 | * Use: Finds a passphrase with a given tag. |
267 | */ |
268 | |
269 | static phrase *p_find(const char *tag) |
270 | { |
271 | phrase *p; |
272 | |
273 | for (p = P_ROOT->next; p != P_ROOT; p = p->next) { |
274 | if (strcmp(p->tag, tag) == 0) { |
275 | if (p->t) { |
276 | struct timeval tv; |
277 | sel_rmtimer(&p->timer); |
278 | gettimeofday(&tv, 0); |
279 | tv.tv_sec += p->t; |
280 | sel_addtimer(&sel, &p->timer, &tv, p_timer, p); |
281 | } |
282 | p->next->prev = p->prev; |
283 | p->prev->next = p->next; |
284 | p->next = P_ROOT; |
285 | p->prev = P_ROOT->prev; |
286 | P_ROOT->prev->next = p; |
287 | P_ROOT->prev = p; |
288 | return (p); |
289 | } |
290 | } |
291 | return (0); |
292 | } |
293 | |
294 | /* --- @p_add@ --- * |
295 | * |
296 | * Arguments: @const char *tag@ = pointer to tag string |
297 | * @const char *p@ = pointer to passphrase |
298 | * @unsigned long t@ = expiry timeout |
299 | * |
300 | * Returns: Pointer to newly-added passphrase. |
301 | * |
302 | * Use: Adds a new passphrase. The tag must not already exist. |
303 | */ |
304 | |
305 | static phrase *p_add(const char *tag, const char *p, unsigned long t) |
306 | { |
307 | size_t sz = strlen(p) + 1; |
308 | char *l = p_alloc(sz); |
309 | phrase *pp; |
310 | |
311 | /* --- Make sure the locked memory was allocated --- */ |
312 | |
313 | if (!l) |
314 | return (0); |
315 | |
316 | /* --- Fill in some other bits of the block --- */ |
317 | |
318 | pp = CREATE(phrase); |
319 | memcpy(l, p, sz); |
320 | pp->p = l; |
321 | pp->tag = xstrdup(tag); |
322 | pp->f = 0; |
323 | |
324 | /* --- Set the timer --- */ |
325 | |
326 | pp->t = t; |
327 | if (t) { |
328 | struct timeval tv; |
329 | gettimeofday(&tv, 0); |
330 | tv.tv_sec += t; |
331 | sel_addtimer(&sel, &pp->timer, &tv, p_timer, pp); |
332 | } |
333 | |
334 | /* --- Link the block into the chain --- */ |
335 | |
336 | pp->next = P_ROOT; |
337 | pp->prev = P_ROOT->prev; |
338 | P_ROOT->prev->next = pp; |
339 | P_ROOT->prev = pp; |
340 | return (pp); |
341 | } |
342 | |
343 | /* --- @p_flush@ --- * |
344 | * |
345 | * Arguments: @const char *tag@ = pointer to tag string, or zero for all |
346 | * |
347 | * Returns: --- |
348 | * |
349 | * Use: Immediately flushes either a single phrase or all of them. |
350 | */ |
351 | |
352 | static void p_flush(const char *tag) |
353 | { |
354 | phrase *p; |
355 | |
356 | if (!tag && verbose > 1) |
357 | log("flushing all passphrases"); |
52b8f75d |
358 | p = P_ROOT->next; |
359 | while (p != P_ROOT) { |
360 | phrase *pp = p->next; |
069c185c |
361 | if (!tag) |
362 | p_free(p); |
363 | else if (strcmp(p->tag, tag) == 0) { |
364 | if (verbose > 1) |
365 | log("flushing passphrase `%s'", tag); |
366 | p_free(p); |
367 | break; |
368 | } |
52b8f75d |
369 | p = pp; |
069c185c |
370 | } |
371 | } |
372 | |
373 | /*----- Reading passphrases -----------------------------------------------*/ |
374 | |
375 | /* --- @p_request@ --- * |
376 | * |
377 | * Arguments: @const char *msg@ = message string |
378 | * @const char *tag@ = pointer to tag string |
379 | * @char *buf@ = pointer to (locked) buffer |
380 | * @size_t sz@ = size of buffer |
381 | * |
382 | * Returns: Zero if all went well, nonzero otherwise. |
383 | * |
384 | * Use: Requests a passphrase from the user. |
385 | */ |
386 | |
387 | static int p_request(const char *msg, const char *tag, char *buf, size_t sz) |
388 | { |
389 | /* --- If there's a passphrase-fetching command, run it --- */ |
390 | |
391 | if (command) { |
392 | dstr d = DSTR_INIT; |
393 | const char *p; |
394 | int fd[2]; |
395 | pid_t kid; |
396 | int r; |
4cb04adb |
397 | int rc; |
069c185c |
398 | |
399 | /* --- Substitute the prompt string into the command --- */ |
400 | |
401 | p = command; |
402 | for (;;) { |
403 | const char *q = strchr(p, '%'); |
404 | if (!q || !q[1]) { |
405 | DPUTS(&d, p); |
406 | break; |
407 | } |
408 | DPUTM(&d, p, q - p); |
409 | p = q + 1; |
410 | switch (*p) { |
411 | case 'm': |
412 | DPUTS(&d, msg); |
413 | break; |
414 | case 't': |
415 | DPUTS(&d, tag); |
416 | break; |
417 | default: |
418 | DPUTC(&d, '%'); |
419 | DPUTC(&d, *p); |
420 | break; |
421 | } |
422 | p++; |
423 | } |
424 | DPUTZ(&d); |
425 | |
426 | /* --- Create a pipe and start a child process --- */ |
427 | |
428 | if (pipe(fd)) |
429 | goto fail_1; |
430 | if ((kid = fork()) < 0) |
431 | goto fail_2; |
432 | |
433 | /* --- Child process --- */ |
434 | |
435 | fflush(0); |
436 | if (kid == 0) { |
437 | if (dup2(fd[1], STDOUT_FILENO) < 0) |
438 | _exit(127); |
439 | close(fd[0]); |
440 | execl("/bin/sh", "sh", "-c", d.buf, (void *)0); |
441 | _exit(127); |
442 | } |
443 | |
444 | /* --- Read the data back into my buffer --- */ |
445 | |
446 | close(fd[1]); |
447 | if ((r = read(fd[0], buf, sz - 1)) >= 0) { |
448 | char *q = memchr(buf, '\n', r); |
449 | if (!q) |
450 | q = buf + r; |
451 | *q = 0; |
452 | } |
453 | close(fd[0]); |
4cb04adb |
454 | waitpid(kid, &rc, 0); |
069c185c |
455 | dstr_destroy(&d); |
4cb04adb |
456 | if (r < 0 || rc != 0) |
069c185c |
457 | goto fail_0; |
6a2d21e4 |
458 | goto ok; |
069c185c |
459 | |
460 | /* --- Tidy up when things go wrong --- */ |
461 | |
462 | fail_2: |
463 | close(fd[0]); |
464 | close(fd[1]); |
465 | fail_1: |
466 | dstr_destroy(&d); |
467 | fail_0: |
468 | return (-1); |
469 | } |
470 | |
471 | /* --- Read a passphrase from the terminal --- * |
472 | * |
473 | * Use the standard Catacomb passphrase-reading function, so it'll read the |
474 | * passphrase from a file descriptor or something if the appropriate |
475 | * environment variable is set. |
476 | */ |
477 | |
478 | { |
479 | dstr d = DSTR_INIT; |
480 | int rc; |
481 | dstr_putf(&d, "%s %s: ", msg, tag); |
482 | rc = pixie_getpass(d.buf, buf, sz); |
483 | dstr_destroy(&d); |
6a2d21e4 |
484 | if (rc) |
485 | return (rc); |
486 | goto ok; |
069c185c |
487 | } |
6a2d21e4 |
488 | |
489 | /* --- Sort out the buffer --- * |
490 | * |
491 | * Strip leading spaces. |
492 | */ |
493 | |
494 | ok: { |
495 | char *p = buf; |
496 | size_t len; |
497 | while (isspace((unsigned char)*p)) |
498 | p++; |
499 | len = strlen(p); |
500 | memmove(buf, p, len); |
501 | p[len] = 0; |
502 | } |
503 | |
504 | /* --- Done --- */ |
505 | |
506 | return (0); |
069c185c |
507 | } |
508 | |
509 | /* --- @p_get@ --- * |
510 | * |
6a2d21e4 |
511 | * Arguments: @const char **q@ = where to store the result |
512 | * @const char *tag@ = pointer to tag string |
069c185c |
513 | * @unsigned mode@ = reading mode (verify?) |
514 | * @time_t exp@ = expiry time suggestion |
515 | * |
6a2d21e4 |
516 | * Returns: Zero if successful, @-1@ on a read failure, or @+1@ if the |
517 | * passphrase is missing and there is no fetcher. (This will |
518 | * always happen if there is no fetcher and @mode@ is |
519 | * @PMODE_VERIFY@. |
069c185c |
520 | * |
521 | * Use: Reads a passphrase from somewhere. |
522 | */ |
523 | |
6a2d21e4 |
524 | static int p_get(const char **q, const char *tag, unsigned mode, time_t exp) |
069c185c |
525 | { |
526 | #define LBUFSZ 1024 |
527 | |
528 | phrase *p; |
529 | char *pp = 0; |
530 | |
531 | /* --- Write a log message --- */ |
532 | |
533 | if (verbose > 1) |
534 | log("passphrase `%s' requested", tag); |
535 | |
6a2d21e4 |
536 | /* --- If there is no fetcher, life is simpler --- */ |
537 | |
538 | if (!(flags & F_FETCH)) { |
539 | if (mode == PMODE_VERIFY) |
540 | return (+1); |
541 | if ((p = p_find(tag)) == 0) |
542 | return (+1); |
543 | *q = p->p; |
544 | return (0); |
545 | } |
546 | |
069c185c |
547 | /* --- Try to find the phrase --- */ |
548 | |
6a2d21e4 |
549 | if (mode == PMODE_VERIFY) |
550 | p_flush(tag); |
551 | if (mode == PMODE_VERIFY || (p = p_find(tag)) == 0) { |
069c185c |
552 | if ((pp = p_alloc(LBUFSZ)) == 0) |
553 | goto fail; |
6a2d21e4 |
554 | if (p_request(mode == PMODE_READ ? "Passphrase" : "New passphrase", |
555 | tag, pp, LBUFSZ) < 0) |
069c185c |
556 | goto fail; |
557 | p = p_add(tag, pp, exp); |
558 | if (!p) |
559 | goto fail; |
560 | } |
561 | |
562 | /* --- If verification is requested, verify the passphrase --- */ |
563 | |
564 | if (mode == PMODE_VERIFY) { |
565 | if (!pp && (pp = p_alloc(LBUFSZ)) == 0) |
566 | goto fail; |
567 | if (p_request("Verify passphrase", tag, pp, LBUFSZ) < 0) |
568 | goto fail; |
569 | if (strcmp(pp, p->p) != 0) { |
570 | if (verbose) |
571 | log("passphrases for `%s' don't match", tag); |
572 | p_free(p); |
573 | goto fail; |
574 | } |
575 | } |
576 | |
577 | /* --- Tidy up and return the passphrase --- */ |
578 | |
579 | if (pp) { |
580 | memset(pp, 0, LBUFSZ); |
581 | l_free(&lm, pp); |
582 | } |
6a2d21e4 |
583 | *q = p->p; |
584 | return (0); |
069c185c |
585 | |
586 | /* --- Tidy up if things went wrong --- */ |
587 | |
588 | fail: |
589 | if (pp) { |
590 | memset(pp, 0, LBUFSZ); |
591 | l_free(&lm, pp); |
592 | } |
4cb04adb |
593 | return (-1); |
069c185c |
594 | |
595 | #undef LBUFSZ |
596 | } |
597 | |
598 | /*----- Server command parsing --------------------------------------------*/ |
599 | |
600 | /* --- Data structures --- */ |
601 | |
602 | typedef struct pixserv { |
603 | selbuf b; |
604 | int fd; |
605 | sel_timer timer; |
6a2d21e4 |
606 | unsigned f; |
069c185c |
607 | } pixserv; |
608 | |
9d23d982 |
609 | #define px_stdin 1u |
6a2d21e4 |
610 | |
611 | #define PIXSERV_TIMEOUT 30 |
069c185c |
612 | |
613 | /* --- @pixserv_expire@ --- * |
614 | * |
615 | * Arguments: @struct timeval *tv@ = pointer to current time |
616 | * @void *p@ = pointer to server block |
617 | * |
618 | * Returns: --- |
619 | * |
620 | * Use: Expires a pixie connection if the remote end decides he's not |
621 | * interested any more. |
622 | */ |
623 | |
624 | static void pixserv_expire(struct timeval *tv, void *p) |
625 | { |
626 | pixserv *px = p; |
627 | if (px->fd != px->b.reader.fd) |
628 | close(px->fd); |
6a2d21e4 |
629 | selbuf_destroy(&px->b); |
069c185c |
630 | close(px->b.reader.fd); |
631 | DESTROY(px); |
632 | } |
633 | |
634 | /* --- @pixserv_write@ --- * |
635 | * |
636 | * Arguments: @pixserv *px@ = pointer to server block |
637 | * @const char *p@ = pointer to skeleton string |
638 | * @...@ = other arguments to fill in |
639 | * |
640 | * Returns: --- |
641 | * |
642 | * Use: Formats a string and emits it to the output file. |
643 | */ |
644 | |
645 | static void pixserv_write(pixserv *px, const char *p, ...) |
646 | { |
647 | dstr d = DSTR_INIT; |
648 | va_list ap; |
649 | |
650 | va_start(ap, p); |
651 | dstr_vputf(&d, p, ap); |
652 | write(px->fd, d.buf, d.len); |
653 | va_end(ap); |
654 | dstr_destroy(&d); |
655 | } |
656 | |
657 | /* --- @pixserv_timeout@ --- * |
658 | * |
659 | * Arguments: @const char *p@ = pointer to timeout string |
660 | * |
661 | * Returns: Timeout in seconds. |
662 | * |
663 | * Use: Translates a string to a timeout value in seconds. |
664 | */ |
665 | |
666 | static unsigned long pixserv_timeout(const char *p) |
667 | { |
668 | unsigned long t; |
669 | char *q; |
670 | |
671 | if (!p) |
672 | return (timeout); |
673 | |
674 | t = strtoul(p, &q, 0); |
675 | switch (*q) { |
676 | case 'd': t *= 24; |
677 | case 'h': t *= 60; |
678 | case 'm': t *= 60; |
679 | case 's': if (q[1] != 0) |
680 | default: t = 0; |
681 | case 0: break; |
682 | } |
683 | return (t); |
684 | } |
685 | |
686 | /* --- @pixserv_line@ --- * |
687 | * |
688 | * Arguments: @char *s@ = pointer to the line read |
689 | * @void *p@ = pointer to server block |
690 | * |
691 | * Returns: --- |
692 | * |
693 | * Use: Handles a line read from the client. |
694 | */ |
695 | |
696 | static void pixserv_line(char *s, void *p) |
697 | { |
698 | pixserv *px = p; |
699 | char *q, *qq; |
700 | unsigned mode; |
701 | |
702 | /* --- Handle an end-of-file --- */ |
703 | |
6a2d21e4 |
704 | if (!(px->f & px_stdin)) |
705 | sel_rmtimer(&px->timer); |
069c185c |
706 | if (!s) { |
707 | if (px->fd != px->b.reader.fd) |
708 | close(px->fd); |
6a2d21e4 |
709 | selbuf_destroy(&px->b); |
069c185c |
710 | close(px->b.reader.fd); |
711 | return; |
712 | } |
713 | |
714 | /* --- Fiddle the timeout --- */ |
715 | |
6a2d21e4 |
716 | if (!(px->f & px_stdin)) { |
069c185c |
717 | struct timeval tv; |
718 | gettimeofday(&tv, 0); |
719 | tv.tv_sec += PIXSERV_TIMEOUT; |
720 | sel_addtimer(&sel, &px->timer, &tv, pixserv_expire, px); |
721 | } |
722 | |
723 | /* --- Scan out the first word --- */ |
724 | |
725 | if ((q = str_getword(&s)) == 0) |
726 | return; |
727 | for (qq = q; *qq; qq++) |
728 | *qq = tolower((unsigned char)*qq); |
729 | |
730 | /* --- Handle a help request --- */ |
731 | |
732 | if (strcmp(q, "help") == 0) { |
733 | pixserv_write(px, "\ |
734 | INFO Commands supported:\n\ |
735 | INFO HELP\n\ |
736 | INFO LIST\n\ |
737 | INFO PASS tag [expire]\n\ |
738 | INFO VERIFY tag [expire]\n\ |
739 | INFO FLUSH [tag]\n\ |
6a2d21e4 |
740 | INFO SET tag [expire] -- phrase\n\ |
069c185c |
741 | INFO QUIT\n\ |
742 | OK\n\ |
743 | "); |
744 | } |
745 | |
746 | /* --- List the passphrases --- */ |
747 | |
748 | else if (strcmp(q, "list") == 0) { |
749 | phrase *p; |
750 | |
751 | for (p = P_ROOT->next; p != P_ROOT; p = p->next) { |
752 | if (!p->t) |
753 | pixserv_write(px, "ITEM %s no-expire\n", p->tag); |
754 | else { |
755 | struct timeval tv; |
756 | gettimeofday(&tv, 0); |
757 | TV_SUB(&tv, &p->timer.tv, &tv); |
758 | pixserv_write(px, "ITEM %s %i\n", p->tag, tv.tv_sec); |
759 | } |
760 | } |
761 | pixserv_write(px, "OK\n"); |
762 | } |
763 | |
764 | /* --- Request a passphrase --- */ |
765 | |
766 | else if ((mode = PMODE_READ, strcmp(q, "pass") == 0) || |
767 | (mode = PMODE_VERIFY, strcmp(q, "verify") == 0)) { |
768 | unsigned long t; |
769 | const char *p; |
6a2d21e4 |
770 | int rc; |
069c185c |
771 | |
772 | if ((q = str_getword(&s)) == 0) |
773 | pixserv_write(px, "FAIL missing tag\n"); |
774 | else if ((t = pixserv_timeout(s)) == 0) |
775 | pixserv_write(px, "FAIL bad timeout\n"); |
6a2d21e4 |
776 | else { |
777 | rc = p_get(&p, q, mode, t > timeout ? timeout : t); |
778 | switch (rc) { |
779 | case 0: |
780 | pixserv_write(px, "OK %s\n", p); |
781 | break; |
782 | case -1: |
783 | pixserv_write(px, "FAIL error reading passphrase\n"); |
784 | break; |
785 | case +1: |
786 | pixserv_write(px, "MISSING\n"); |
787 | break; |
788 | } |
789 | } |
069c185c |
790 | } |
791 | |
792 | /* --- Flush existing passphrases --- */ |
793 | |
794 | else if (strcmp(q, "flush") == 0) { |
795 | q = str_getword(&s); |
796 | p_flush(q); |
797 | pixserv_write(px, "OK\n"); |
798 | } |
799 | |
6a2d21e4 |
800 | /* --- Set a passphrase --- */ |
801 | |
802 | else if (strcmp(q, "set") == 0) { |
803 | char *tag; |
804 | unsigned long t; |
805 | if ((tag = str_getword(&s)) == 0) |
806 | pixserv_write(px, "FAIL missing tag\n"); |
807 | else if ((q = str_getword(&s)) == 0) |
808 | pixserv_write(px, "FAIL no passphrase\n"); |
809 | else { |
810 | if (strcmp(q, "--") != 0) { |
811 | t = pixserv_timeout(q); |
812 | q = str_getword(&s); |
813 | } else |
814 | t = pixserv_timeout(0); |
815 | if (!q) |
816 | pixserv_write(px, "FAIL no passphrase\n"); |
817 | else if (strcmp(q, "--") != 0) |
818 | pixserv_write(px, "FAIL rubbish found before passphrase\n"); |
819 | else { |
820 | p_flush(tag); |
821 | p_add(tag, s, t); |
822 | pixserv_write(px, "OK\n"); |
823 | } |
824 | } |
825 | } |
826 | |
069c185c |
827 | /* --- Shut the server down --- */ |
828 | |
829 | else if (strcmp(q, "quit") == 0) { |
830 | if (verbose) |
6a2d21e4 |
831 | log("%s client requested shutdown", |
832 | px->f & px_stdin ? "local" : "remote"); |
069c185c |
833 | pixserv_write(px, "OK\n"); |
834 | exit(0); |
835 | } |
836 | |
837 | /* --- Report an error for other commands --- */ |
838 | |
839 | else |
840 | pixserv_write(px, "FAIL unknown command `%s'\n", q); |
841 | } |
842 | |
843 | /* --- @pixserv_create@ --- * |
844 | * |
845 | * Arguments: @int fd@ = file descriptor to read from |
846 | * @int ofd@ = file descriptor to write to |
847 | * |
6a2d21e4 |
848 | * Returns: Pointer to the new connection. |
069c185c |
849 | * |
850 | * Use: Creates a new Pixie server instance for a new connection. |
851 | */ |
852 | |
6a2d21e4 |
853 | static pixserv *pixserv_create(int fd, int ofd) |
069c185c |
854 | { |
855 | pixserv *px = CREATE(pixserv); |
856 | struct timeval tv; |
857 | fdflags(fd, O_NONBLOCK, O_NONBLOCK, FD_CLOEXEC, FD_CLOEXEC); |
858 | if (ofd != fd) |
859 | fdflags(ofd, O_NONBLOCK, O_NONBLOCK, FD_CLOEXEC, FD_CLOEXEC); |
860 | px->fd = ofd; |
861 | selbuf_init(&px->b, &sel, fd, pixserv_line, px); |
6a2d21e4 |
862 | px->b.b.a = arena_secure; |
863 | selbuf_setsize(&px->b, 1024); |
069c185c |
864 | gettimeofday(&tv, 0); |
865 | tv.tv_sec += PIXSERV_TIMEOUT; |
866 | sel_addtimer(&sel, &px->timer, &tv, pixserv_expire, px); |
6a2d21e4 |
867 | px->f = 0; |
868 | return (px); |
069c185c |
869 | } |
870 | |
871 | /* --- @pixserv_accept@ --- * |
872 | * |
873 | * Arguments: @int fd@ = file descriptor |
874 | * @unsigned mode@ = what's happened |
875 | * @void *p@ = an uninteresting argument |
876 | * |
877 | * Returns: --- |
878 | * |
879 | * Use: Accepts a new connection. |
880 | */ |
881 | |
882 | static void pixserv_accept(int fd, unsigned mode, void *p) |
883 | { |
884 | int nfd; |
885 | struct sockaddr_un sun; |
4933a180 |
886 | size_t sunsz = sizeof(sun); |
069c185c |
887 | |
888 | if (mode != SEL_READ) |
889 | return; |
890 | if ((nfd = accept(fd, (struct sockaddr *)&sun, &sunsz)) < 0) { |
891 | if (verbose) |
892 | log("new connection failed: %s", strerror(errno)); |
893 | return; |
894 | } |
895 | pixserv_create(nfd, nfd); |
896 | } |
897 | |
898 | /*----- Setting up the server ---------------------------------------------*/ |
899 | |
900 | /* --- @unlinksocket@ --- * |
901 | * |
902 | * Arguments: --- |
903 | * |
904 | * Returns: --- |
905 | * |
906 | * Use: Tidies up the socket when it's finished with. |
907 | */ |
908 | |
909 | static char *sockpath; |
910 | |
911 | static void unlinksocket(void) |
912 | { |
913 | unlink(sockpath); |
914 | l_purge(&lm); |
915 | } |
916 | |
917 | /* --- @pix_sigdie@ --- * |
918 | * |
919 | * Arguments: @int sig@ = signal number |
920 | * @void *p@ = uninteresting argument |
921 | * |
922 | * Returns: --- |
923 | * |
924 | * Use: Shuts down the program after a fatal signal. |
925 | */ |
926 | |
927 | static void pix_sigdie(int sig, void *p) |
928 | { |
929 | if (verbose) { |
930 | char *p; |
931 | char buf[20]; |
932 | |
933 | switch (sig) { |
934 | case SIGTERM: p = "SIGTERM"; break; |
935 | case SIGINT: p = "SIGINT"; break; |
936 | default: |
937 | sprintf(buf, "signal %i", sig); |
938 | p = buf; |
939 | break; |
940 | } |
941 | log("shutting down on %s", p); |
942 | } |
943 | exit(0); |
944 | } |
945 | |
946 | /* --- @pix_sigflush@ --- * |
947 | * |
948 | * Arguments: @int sig@ = signal number |
949 | * @void *p@ = uninteresting argument |
950 | * |
951 | * Returns: --- |
952 | * |
953 | * Use: Flushes the passphrase cache on receipt of a signal. |
954 | */ |
955 | |
956 | static void pix_sigflush(int sig, void *p) |
957 | { |
958 | if (verbose) { |
959 | char *p; |
960 | char buf[20]; |
961 | |
962 | switch (sig) { |
963 | case SIGHUP: p = "SIGHUP"; break; |
964 | case SIGQUIT: p = "SIGQUIT"; break; |
965 | default: |
966 | sprintf(buf, "signal %i", sig); |
967 | p = buf; |
968 | break; |
969 | } |
970 | log("received %s; flushing passphrases", p); |
971 | } |
972 | p_flush(0); |
973 | } |
974 | |
975 | /* --- @pix_setup@ --- * |
976 | * |
977 | * Arguments: @struct sockaddr_un *sun@ = pointer to address to use |
978 | * @size_t sz@ = size of socket address |
979 | * |
980 | * Returns: --- |
981 | * |
982 | * Use: Sets up the pixie's Unix-domain socket. |
983 | */ |
984 | |
985 | static void pix_setup(struct sockaddr_un *sun, size_t sz) |
986 | { |
987 | int fd; |
988 | |
989 | /* --- Set up the parent directory --- */ |
990 | |
991 | { |
069c185c |
992 | char *p = sun->sun_path; |
993 | char *q = strrchr(p, '/'); |
994 | |
995 | if (q) { |
4cb04adb |
996 | dstr d = DSTR_INIT; |
069c185c |
997 | struct stat st; |
998 | |
999 | DPUTM(&d, p, q - p); |
1000 | DPUTZ(&d); |
1001 | |
1002 | mkdir(d.buf, 0700); |
1003 | if (stat(d.buf, &st)) |
1004 | die(1, "couldn't stat `%s': %s", d.buf, strerror(errno)); |
4cb04adb |
1005 | if (!S_ISDIR(st.st_mode)) |
1006 | die(1, "object `%s' isn't a directory", d.buf); |
069c185c |
1007 | if (st.st_mode & 0077) |
1008 | die(1, "parent directory `%s' has group or world access", d.buf); |
4cb04adb |
1009 | dstr_destroy(&d); |
069c185c |
1010 | } |
1011 | } |
1012 | |
1013 | /* --- Initialize the socket --- */ |
1014 | |
1015 | { |
1016 | int n = 5; |
1017 | int e; |
1018 | |
1019 | umask(0077); |
1020 | again: |
1021 | if ((fd = socket(PF_UNIX, SOCK_STREAM, 0)) < 0) |
1022 | die(1, "couldn't create socket: %s", strerror(errno)); |
1023 | if (bind(fd, (struct sockaddr *)sun, sz) < 0) { |
1024 | e = errno; |
1025 | if (errno != EADDRINUSE) |
1026 | die(1, "couldn't bind to address: %s", strerror(e)); |
1027 | if (!n) |
1028 | die(1, "too many retries; giving up"); |
1029 | n--; |
1030 | if (connect(fd, (struct sockaddr *)sun, sz)) { |
4cb04adb |
1031 | struct stat st; |
069c185c |
1032 | if (errno != ECONNREFUSED) |
1033 | die(1, "couldn't bind to address: %s", strerror(e)); |
4cb04adb |
1034 | if (stat(sun->sun_path, &st)) |
1035 | die(1, "couldn't stat `%s': %s", sun->sun_path, strerror(errno)); |
1036 | if (!S_ISSOCK(st.st_mode)) |
1037 | die(1, "object `%s' isn't a socket", sun->sun_path); |
069c185c |
1038 | if (verbose) |
1039 | log("stale socket found; removing it"); |
1040 | unlink(sun->sun_path); |
1041 | close(fd); |
1042 | } else { |
1043 | if (verbose) |
1044 | log("server already running; shutting it down"); |
1045 | write(fd, "QUIT\n", 5); |
1046 | sleep(1); |
1047 | close(fd); |
1048 | } |
1049 | goto again; |
1050 | } |
1051 | chmod(sun->sun_path, 0600); |
1052 | fdflags(fd, O_NONBLOCK, O_NONBLOCK, FD_CLOEXEC, FD_CLOEXEC); |
1053 | if (listen(fd, 5)) |
1054 | die(1, "couldn't listen on socket: %s", strerror(errno)); |
1055 | } |
1056 | |
1057 | /* --- Set up the rest of the server --- */ |
1058 | |
1059 | { |
1060 | static sel_file serv; |
1061 | sockpath = sun->sun_path; |
1062 | atexit(unlinksocket); |
1063 | sel_initfile(&sel, &serv, fd, SEL_READ, pixserv_accept, 0); |
1064 | sel_addfile(&serv); |
1065 | } |
1066 | } |
1067 | |
1068 | /*----- Client support code -----------------------------------------------*/ |
1069 | |
1070 | /* --- Variables --- */ |
1071 | |
6a2d21e4 |
1072 | static selbuf c_server, c_client; |
4933a180 |
1073 | static unsigned c_flags = 0; |
9d23d982 |
1074 | |
1075 | #define cf_uclose 1u |
1076 | #define cf_sclose 2u |
069c185c |
1077 | |
1078 | /* --- Line handler functions --- */ |
1079 | |
1080 | static void c_uline(char *s, void *p) |
1081 | { |
1082 | size_t sz; |
6a2d21e4 |
1083 | if (!s) { |
1084 | selbuf_destroy(&c_client); |
1085 | shutdown(c_server.reader.fd, 1); |
1086 | c_flags |= cf_uclose; |
1087 | } else { |
1088 | sz = strlen(s); |
1089 | s[sz++] = '\n'; |
1090 | write(c_server.reader.fd, s, sz); |
1091 | } |
069c185c |
1092 | } |
1093 | |
1094 | static void c_sline(char *s, void *p) |
1095 | { |
1096 | if (!s) { |
6a2d21e4 |
1097 | selbuf_destroy(&c_server); |
1098 | if (!(c_flags & cf_uclose)) { |
069c185c |
1099 | moan("server closed the connection"); |
6a2d21e4 |
1100 | selbuf_destroy(&c_client); |
1101 | } |
069c185c |
1102 | exit(0); |
6a2d21e4 |
1103 | } else |
1104 | puts(s); |
069c185c |
1105 | } |
1106 | |
1107 | /* --- @pix_client@ --- * |
1108 | * |
1109 | * Arguments: @struct sockaddr_un *sun@ = pointer to socket address |
1110 | * @size_t sz@ = size of socket address |
1111 | * @char *argv[]@ = pointer to arguments to send |
1112 | * |
1113 | * Returns: --- |
1114 | * |
1115 | * Use: Performs client-side actions for the passphrase pixie. |
1116 | */ |
1117 | |
1118 | static void pix_client(struct sockaddr_un *sun, size_t sz, char *argv[]) |
1119 | { |
1120 | int fd; |
1121 | |
4cb04adb |
1122 | /* --- Dispose of locked memory --- */ |
1123 | |
1124 | l_destroy(&lm); |
1125 | |
069c185c |
1126 | /* --- Open the socket --- */ |
1127 | |
1128 | if ((fd = socket(PF_UNIX, SOCK_STREAM, 0)) < 0) |
1129 | die(1, "couldn't create socket: %s", strerror(errno)); |
1130 | if (connect(fd, (struct sockaddr *)sun, sz)) |
1131 | die(1, "couldn't connect to server: %s", strerror(errno)); |
1132 | selbuf_init(&c_server, &sel, fd, c_sline, 0); |
1133 | |
1134 | /* --- If there are any arguments, turn them into a string --- */ |
1135 | |
1136 | if (!*argv) |
1137 | selbuf_init(&c_client, &sel, STDIN_FILENO, c_uline, 0); |
1138 | else { |
1139 | dstr d = DSTR_INIT; |
1140 | DPUTS(&d, *argv++); |
1141 | while (*argv) { |
1142 | DPUTC(&d, ' '); |
1143 | DPUTS(&d, *argv++); |
1144 | } |
1145 | DPUTC(&d, '\n'); |
1146 | write(fd, d.buf, d.len); |
1147 | shutdown(fd, 1); |
4cb04adb |
1148 | c_flags |= cf_uclose; |
069c185c |
1149 | dstr_destroy(&d); |
1150 | } |
1151 | |
1152 | /* --- And repeat --- */ |
1153 | |
1154 | for (;;) |
1155 | sel_select(&sel); |
1156 | } |
1157 | |
1158 | /*----- Main code ---------------------------------------------------------*/ |
1159 | |
1160 | /* --- @help@, @version@, @usage@ --- * |
1161 | * |
1162 | * Arguments: @FILE *fp@ = stream to write on |
1163 | * |
1164 | * Returns: --- |
1165 | * |
1166 | * Use: Emit helpful messages. |
1167 | */ |
1168 | |
1169 | static void usage(FILE *fp) |
1170 | { |
1171 | pquis(fp, "\ |
1172 | Usage:\n\ |
4cb04adb |
1173 | $ [-qvfidl] [-c command] [-t timeout] [-s socket]\n\ |
069c185c |
1174 | $ [-s socket] -C [command args...]\n\ |
1175 | "); |
1176 | } |
1177 | |
1178 | static void version(FILE *fp) |
1179 | { |
1180 | pquis(fp, "$, Catacomb version " VERSION "\n"); |
1181 | } |
1182 | |
1183 | static void help(FILE *fp) |
1184 | { |
1185 | version(fp); |
1186 | fputc('\n', fp); |
1187 | usage(fp); |
1188 | pquis(fp, "\n\ |
1189 | The Catacomb passphrase pixie collects and caches passphrases used to\n\ |
1190 | protect important keys. Options provided:\n\ |
1191 | \n\ |
1192 | -h, --help Show this help text.\n\ |
1193 | -V, --version Show the program's version number.\n\ |
1194 | -u, --usage Show a (very) terse usage summary.\n\ |
1195 | \n\ |
1196 | -C, --client Connect to a running pixie as a client.\n\ |
1197 | \n\ |
1198 | -q, --quiet Emit fewer log messages.\n\ |
1199 | -v, --version Emit more log messages.\n\ |
1200 | -s, --socket=FILE Name the pixie's socket.\n\ |
1201 | -c, --command=COMMAND Shell command to read a passphrase.\n\ |
6a2d21e4 |
1202 | -f, --fetch Fetch passphrases from the terminal.\n\ |
069c185c |
1203 | -t, --timeout=TIMEOUT Length of time to retain a passphrase in memory.\n\ |
1204 | -i, --interactive Allow commands to be typed interactively.\n\ |
6a2d21e4 |
1205 | -d, --daemon Fork into the background after initialization.\n\ |
069c185c |
1206 | -l, --syslog Emit log messages to the system log.\n\ |
1207 | \n\ |
1208 | The COMMAND may contain `%m' and `%t' markers which are replaced by a\n\ |
1209 | prompt message and the passphrase tag respectively. The TIMEOUT is an\n\ |
1210 | integer, optionally followed by `d', `h', `m' or `s' to specify units of\n\ |
1211 | days, hours, minutes or seconds respectively.\n\ |
1212 | \n\ |
1213 | In client mode, if a command is specified on the command line, it is sent\n\ |
1214 | to the running server; otherwise the program reads requests from stdin.\n\ |
1215 | Responses from the pixie are written to stdout. Send a HELP request for\n\ |
1216 | a quick summary of the pixie communication protocol.\n\ |
1217 | "); |
1218 | } |
1219 | |
1220 | /* --- @main@ --- * |
1221 | * |
1222 | * Arguments: @int argc@ = number of arguments |
1223 | * @char *argv[]@ = vector of argument values |
1224 | * |
1225 | * Returns: Zero if OK. |
1226 | * |
1227 | * Use: Main program. Listens on a socket and responds with a PGP |
1228 | * passphrase when asked. |
1229 | */ |
1230 | |
1231 | int main(int argc, char *argv[]) |
1232 | { |
1233 | char *path = 0; |
1234 | struct sockaddr_un *sun; |
1235 | size_t sz; |
1236 | unsigned f = 0; |
1237 | |
16efd15b |
1238 | #define f_bogus 1u |
1239 | #define f_client 2u |
1240 | #define f_stdin 4u |
1241 | #define f_daemon 8u |
1242 | #define f_syslog 16u |
069c185c |
1243 | |
1244 | /* --- Initialize libraries --- */ |
1245 | |
1246 | ego(argv[0]); |
1247 | sub_init(); |
1248 | |
1249 | /* --- Set up the locked memory area --- */ |
1250 | |
6a2d21e4 |
1251 | l_init(&lm, 16384); |
069c185c |
1252 | setuid(getuid()); |
1253 | |
1254 | /* --- Parse command line arguments --- */ |
1255 | |
1256 | for (;;) { |
1257 | static struct option opts[] = { |
1258 | |
1259 | /* --- Standard GNUy help options --- */ |
1260 | |
1261 | { "help", 0, 0, 'h' }, |
1262 | { "version", 0, 0, 'V' }, |
1263 | { "usage", 0, 0, 'u' }, |
1264 | |
1265 | /* --- Other options --- */ |
1266 | |
1267 | { "quiet", 0, 0, 'q' }, |
1268 | { "verbose", 0, 0, 'v' }, |
1269 | { "client", 0, 0, 'C' }, |
1270 | { "socket", OPTF_ARGREQ, 0, 's' }, |
1271 | { "command", OPTF_ARGREQ, 0, 'c' }, |
6a2d21e4 |
1272 | { "fetch", 0, 0, 'f' }, |
069c185c |
1273 | { "timeout", OPTF_ARGREQ, 0, 't' }, |
1274 | { "interactive", 0, 0, 'i' }, |
1275 | { "stdin", 0, 0, 'i' }, |
1276 | { "daemon", 0, 0, 'd' }, |
1277 | { "log", 0, 0, 'l' }, |
1278 | { "syslog", 0, 0, 'l' }, |
1279 | |
1280 | /* --- Magic terminator --- */ |
1281 | |
1282 | { 0, 0, 0, 0 } |
1283 | }; |
1284 | |
6a2d21e4 |
1285 | int i = mdwopt(argc, argv, "hVuqvCs:c:ft:idl", opts, 0, 0, 0); |
069c185c |
1286 | if (i < 0) |
1287 | break; |
1288 | |
1289 | switch (i) { |
1290 | |
1291 | /* --- GNUy help options --- */ |
1292 | |
1293 | case 'h': |
1294 | help(stdout); |
1295 | exit(0); |
1296 | case 'V': |
1297 | version(stdout); |
1298 | exit(0); |
1299 | case 'u': |
1300 | usage(stdout); |
1301 | exit(0); |
1302 | |
1303 | /* --- Other interesting things --- */ |
1304 | |
1305 | case 'q': |
1306 | if (verbose) |
1307 | verbose--; |
1308 | break; |
1309 | case 'v': |
1310 | verbose++; |
1311 | break; |
1312 | case 'C': |
1313 | f |= f_client; |
1314 | break; |
1315 | case 's': |
1316 | path = optarg; |
1317 | break; |
1318 | case 't': |
1319 | if ((timeout = pixserv_timeout(optarg)) == 0) |
1320 | die(1, "bad timeout `%s'", optarg); |
1321 | break; |
1322 | case 'c': |
1323 | command = optarg; |
6a2d21e4 |
1324 | flags |= F_FETCH; |
1325 | break; |
1326 | case 'f': |
1327 | flags |= F_FETCH; |
069c185c |
1328 | break; |
1329 | case 'i': |
1330 | f |= f_stdin; |
1331 | break; |
1332 | case 'd': |
1333 | f |= f_daemon; |
1334 | break; |
1335 | case 'l': |
1336 | f |= f_syslog; |
1337 | break; |
1338 | |
1339 | /* --- Something else --- */ |
1340 | |
1341 | default: |
1342 | f |= f_bogus; |
1343 | break; |
1344 | } |
1345 | } |
1346 | |
1347 | if (f & f_bogus || (optind < argc && !(f & f_client))) { |
1348 | usage(stderr); |
1349 | exit(1); |
1350 | } |
1351 | |
1352 | /* --- Set up the socket address --- */ |
1353 | |
1354 | sun = pixie_address(path, &sz); |
1355 | |
1356 | /* --- Initialize selectory --- */ |
1357 | |
1358 | sel_init(&sel); |
1359 | signal(SIGPIPE, SIG_IGN); |
1360 | |
1361 | /* --- Be a client if a client's wanted --- */ |
1362 | |
1363 | if (f & f_client) |
1364 | pix_client(sun, sz, argv + optind); |
1365 | |
1366 | /* --- Open the syslog if requested --- */ |
1367 | |
1368 | if (f & f_syslog) { |
1369 | flags |= F_SYSLOG; |
1370 | openlog(QUIS, 0, LOG_DAEMON); |
1371 | } |
1372 | |
1373 | /* --- Check on the locked memory area --- */ |
1374 | |
1375 | { |
1376 | dstr d = DSTR_INIT; |
1377 | int rc = l_report(&lm, &d); |
1378 | if (rc < 0) |
1379 | die(EXIT_FAILURE, d.buf); |
1380 | else if (rc && verbose) { |
1381 | log(d.buf); |
1382 | log("couldn't lock passphrase buffer"); |
1383 | } |
1384 | dstr_destroy(&d); |
6a2d21e4 |
1385 | arena_setsecure(&lm.a); |
069c185c |
1386 | } |
1387 | |
1388 | /* --- Set signal behaviours --- */ |
1389 | |
1390 | { |
1391 | static sig sigint, sigterm, sigquit, sighup; |
1392 | sig_init(&sel); |
1393 | sig_add(&sigint, SIGINT, pix_sigdie, 0); |
1394 | sig_add(&sigterm, SIGTERM, pix_sigdie, 0); |
1395 | sig_add(&sigquit, SIGQUIT, pix_sigflush, 0); |
1396 | sig_add(&sighup, SIGHUP, pix_sigflush, 0); |
1397 | } |
1398 | |
1399 | /* --- Set up the server --- */ |
1400 | |
1401 | pix_setup(sun, sz); |
6a2d21e4 |
1402 | if (f & f_stdin) { |
1403 | pixserv *px = pixserv_create(STDIN_FILENO, STDOUT_FILENO); |
1404 | sel_rmtimer(&px->timer); |
1405 | px->f |= px_stdin; |
1406 | } |
069c185c |
1407 | |
1408 | /* --- Fork into the background if requested --- */ |
1409 | |
1410 | if (f & f_daemon) { |
1411 | pid_t kid; |
1412 | |
1413 | if (((f & f_stdin) && |
1414 | (isatty(STDIN_FILENO) || isatty(STDOUT_FILENO))) || |
6a2d21e4 |
1415 | (!command && (flags & F_FETCH))) |
069c185c |
1416 | die(1, "can't become a daemon if terminal required"); |
1417 | |
1418 | if ((kid = fork()) < 0) |
1419 | die(1, "fork failed: %s", strerror(errno)); |
1420 | if (kid) |
1421 | _exit(0); |
1422 | #ifdef TIOCNOTTY |
1423 | { |
1424 | int fd; |
1425 | if ((fd = open("/dev/tty", O_RDONLY)) >= 0) { |
1426 | ioctl(fd, TIOCNOTTY); |
1427 | close(fd); |
1428 | } |
1429 | } |
1430 | #endif |
4cb04adb |
1431 | chdir("/"); |
069c185c |
1432 | setsid(); |
1433 | |
1434 | if (fork() > 0) |
1435 | _exit(0); |
1436 | } |
1437 | |
2b2d07ca |
1438 | if (verbose) |
1439 | log("initialized ok"); |
069c185c |
1440 | for (;;) |
1441 | sel_select(&sel); |
1442 | return (0); |
1443 | } |
1444 | |
1445 | /*----- That's all, folks -------------------------------------------------*/ |