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