069c185c |
1 | /* -*-c-*- |
2 | * |
2c41d513 |
3 | * $Id: pixie.c,v 1.9 2001/02/03 16:06:44 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 $ |
2c41d513 |
33 | * Revision 1.9 2001/02/03 16:06:44 mdw |
34 | * Don't set a handler for @SIGINT@ if it's ignored at startup. Add some |
35 | * error handling for the @select@ loop. |
36 | * |
9d23d982 |
37 | * Revision 1.8 2001/01/25 22:19:31 mdw |
38 | * Make flags be unsigned. |
39 | * |
16efd15b |
40 | * Revision 1.7 2000/12/06 20:33:27 mdw |
41 | * Make flags be macros rather than enumerations, to ensure that they're |
42 | * unsigned. |
43 | * |
4933a180 |
44 | * Revision 1.6 2000/10/08 12:06:46 mdw |
45 | * Change size passed to socket function to be a @size_t@. Insert missing |
46 | * type name for flag declaration. |
47 | * |
4cb04adb |
48 | * Revision 1.5 2000/07/29 22:05:22 mdw |
49 | * Miscellaneous tidyings: |
50 | * |
51 | * * Change the timeout to something more appropriate for real use. |
52 | * |
53 | * * Check assumptions about object types when binding the socket. In |
54 | * particular, don't zap the socket if it's really something else. |
55 | * |
56 | * * In @p_request@, return a failure if the shell command returned |
57 | * nonzero. Fix a bug in @p_get@ which incorrectly passes on a success |
58 | * code when this happens. |
59 | * |
60 | * * Dispose of the locked memory in client mode to avoid being |
61 | * antisocial. |
62 | * |
63 | * * Also in client mode, don't report closure from the server if we're |
64 | * running noninteractively. |
65 | * |
66 | * * Insert a missing option letter into the usage string. |
67 | * |
68 | * * Change to the root directory after forking in daemon mode. |
69 | * |
6a2d21e4 |
70 | * Revision 1.4 2000/06/17 11:50:53 mdw |
71 | * New pixie protocol allowing application to request passphrases and send |
72 | * them to the pixie. Use the secure arena interface for the input |
73 | * buffer. Extend the input buffer. Other minor fixes. |
74 | * |
2b2d07ca |
75 | * Revision 1.3 1999/12/22 22:14:40 mdw |
76 | * Only produce initialization message if verbose. |
77 | * |
52b8f75d |
78 | * Revision 1.2 1999/12/22 22:13:42 mdw |
79 | * Fix bug in passphrase flushing loop. |
80 | * |
069c185c |
81 | * Revision 1.1 1999/12/22 15:58:41 mdw |
82 | * Passphrase pixie support. |
83 | * |
84 | */ |
85 | |
86 | /*----- Header files ------------------------------------------------------*/ |
87 | |
88 | #include "config.h" |
89 | |
90 | #include <assert.h> |
91 | #include <ctype.h> |
92 | #include <errno.h> |
93 | #include <signal.h> |
94 | #include <stdarg.h> |
95 | #include <stddef.h> |
96 | #include <stdio.h> |
97 | #include <stdlib.h> |
98 | #include <string.h> |
99 | #include <time.h> |
100 | |
101 | #include <sys/types.h> |
102 | #include <sys/time.h> |
103 | #include <unistd.h> |
104 | #include <sys/stat.h> |
105 | #include <sys/wait.h> |
106 | #include <pwd.h> |
107 | #include <fcntl.h> |
108 | #include <sys/ioctl.h> |
109 | #include <termios.h> |
110 | #include <syslog.h> |
111 | |
112 | #include <sys/socket.h> |
113 | #include <sys/un.h> |
114 | |
115 | #include <mLib/alloc.h> |
116 | #include <mLib/dstr.h> |
117 | #include <mLib/fdflags.h> |
118 | #include <mLib/mdwopt.h> |
119 | #include <mLib/quis.h> |
120 | #include <mLib/report.h> |
121 | #include <mLib/sel.h> |
122 | #include <mLib/selbuf.h> |
123 | #include <mLib/sig.h> |
124 | #include <mLib/str.h> |
125 | #include <mLib/sub.h> |
126 | #include <mLib/tv.h> |
127 | |
6a2d21e4 |
128 | #include "arena.h" |
069c185c |
129 | #include "lmem.h" |
130 | #include "passphrase.h" |
131 | #include "pixie.h" |
132 | |
133 | /*----- Static variables --------------------------------------------------*/ |
134 | |
4cb04adb |
135 | static unsigned long timeout = 900; |
069c185c |
136 | static sel_state sel; |
137 | static unsigned verbose = 1; |
138 | static const char *command = 0; |
139 | static lmem lm; |
140 | static unsigned flags = 0; |
141 | |
16efd15b |
142 | #define F_SYSLOG 1u |
143 | #define F_FETCH 2u |
069c185c |
144 | |
145 | /*----- Event logging -----------------------------------------------------*/ |
146 | |
147 | /* --- @log@ --- * |
148 | * |
149 | * Arguments: @const char *p@ = @printf@-style format string |
150 | * @...@ = extra arguments to fill in |
151 | * |
152 | * Returns: --- |
153 | * |
154 | * Use: Writes out a timestamped log message. |
155 | */ |
156 | |
157 | static void log(const char *p, ...) |
158 | { |
159 | dstr d = DSTR_INIT; |
160 | va_list ap; |
161 | |
162 | if (!(flags & F_SYSLOG)) { |
163 | time_t t = time(0); |
164 | struct tm *tm = localtime(&t); |
165 | DENSURE(&d, 64); |
166 | d.len += strftime(d.buf, d.sz, "%Y-%m-%d %H:%M:%S ", tm); |
167 | } |
168 | va_start(ap, p); |
169 | dstr_vputf(&d, p, ap); |
170 | va_end(ap); |
171 | |
172 | if (flags & F_SYSLOG) |
173 | syslog(LOG_NOTICE, "%s", d.buf); |
174 | else { |
175 | DPUTC(&d, '\n'); |
176 | dstr_write(&d, stderr); |
177 | } |
178 | DDESTROY(&d); |
179 | } |
180 | |
181 | /*----- Passphrase management ---------------------------------------------*/ |
182 | |
183 | /* --- Data structures --- */ |
184 | |
185 | typedef struct phrase { |
186 | struct phrase *next; |
187 | struct phrase *prev; |
188 | char *tag; |
189 | char *p; |
190 | unsigned long t; |
191 | sel_timer timer; |
192 | unsigned f; |
193 | } phrase; |
194 | |
195 | /* --- Variables --- */ |
196 | |
197 | #define P_ROOT ((phrase *)&p_root) |
198 | static struct { phrase *next; phrase *prev; } p_root = { P_ROOT, P_ROOT }; |
199 | |
200 | /* --- @p_free@ --- * |
201 | * |
202 | * Arguments: @phrase *p@ = pointer to phrase block |
203 | * |
204 | * Returns: --- |
205 | * |
206 | * Use: Frees a phrase block. |
207 | */ |
208 | |
209 | static void p_free(phrase *p) |
210 | { |
211 | if (p->t) |
212 | sel_rmtimer(&p->timer); |
213 | free(p->tag); |
214 | l_free(&lm, p->p); |
215 | p->next->prev = p->prev; |
216 | p->prev->next = p->next; |
217 | DESTROY(p); |
218 | } |
219 | |
220 | /* --- @p_timer@ --- * |
221 | * |
222 | * Arguments: @struct timeval *tv@ = current time |
223 | * @void *p@ = pointer to phrase |
224 | * |
225 | * Returns: --- |
226 | * |
227 | * Use: Expires a passphrase. |
228 | */ |
229 | |
230 | static void p_timer(struct timeval *tv, void *p) |
231 | { |
232 | phrase *pp = p; |
233 | if (verbose) |
234 | log("expiring passphrase `%s'", pp->tag); |
235 | p_free(pp); |
236 | } |
237 | |
238 | /* --- @p_alloc@ --- * |
239 | * |
240 | * Arguments: @size_t sz@ = amount of memory required |
241 | * |
242 | * Returns: Pointer to allocated memory, or null. |
243 | * |
244 | * Use: Allocates some locked memory, flushing old passphrases if |
245 | * there's not enough space. |
246 | */ |
247 | |
248 | static void *p_alloc(size_t sz) |
249 | { |
250 | for (;;) { |
251 | char *p; |
252 | if ((p = l_alloc(&lm, sz)) != 0) |
253 | return (p); |
254 | if (P_ROOT->next == P_ROOT) |
255 | return (0); |
256 | if (verbose) { |
257 | log("flushing passphrase `%s' to free up needed space", |
258 | P_ROOT->next->tag); |
259 | } |
260 | p_free(P_ROOT->next); |
261 | } |
262 | } |
263 | |
264 | /* --- @p_find@ --- * |
265 | * |
266 | * Arguments: @const char *tag@ = pointer to tag to find |
267 | * |
268 | * Returns: Pointer to passphrase block, or null. |
269 | * |
270 | * Use: Finds a passphrase with a given tag. |
271 | */ |
272 | |
273 | static phrase *p_find(const char *tag) |
274 | { |
275 | phrase *p; |
276 | |
277 | for (p = P_ROOT->next; p != P_ROOT; p = p->next) { |
278 | if (strcmp(p->tag, tag) == 0) { |
279 | if (p->t) { |
280 | struct timeval tv; |
281 | sel_rmtimer(&p->timer); |
282 | gettimeofday(&tv, 0); |
283 | tv.tv_sec += p->t; |
284 | sel_addtimer(&sel, &p->timer, &tv, p_timer, p); |
285 | } |
286 | p->next->prev = p->prev; |
287 | p->prev->next = p->next; |
288 | p->next = P_ROOT; |
289 | p->prev = P_ROOT->prev; |
290 | P_ROOT->prev->next = p; |
291 | P_ROOT->prev = p; |
292 | return (p); |
293 | } |
294 | } |
295 | return (0); |
296 | } |
297 | |
298 | /* --- @p_add@ --- * |
299 | * |
300 | * Arguments: @const char *tag@ = pointer to tag string |
301 | * @const char *p@ = pointer to passphrase |
302 | * @unsigned long t@ = expiry timeout |
303 | * |
304 | * Returns: Pointer to newly-added passphrase. |
305 | * |
306 | * Use: Adds a new passphrase. The tag must not already exist. |
307 | */ |
308 | |
309 | static phrase *p_add(const char *tag, const char *p, unsigned long t) |
310 | { |
311 | size_t sz = strlen(p) + 1; |
312 | char *l = p_alloc(sz); |
313 | phrase *pp; |
314 | |
315 | /* --- Make sure the locked memory was allocated --- */ |
316 | |
317 | if (!l) |
318 | return (0); |
319 | |
320 | /* --- Fill in some other bits of the block --- */ |
321 | |
322 | pp = CREATE(phrase); |
323 | memcpy(l, p, sz); |
324 | pp->p = l; |
325 | pp->tag = xstrdup(tag); |
326 | pp->f = 0; |
327 | |
328 | /* --- Set the timer --- */ |
329 | |
330 | pp->t = t; |
331 | if (t) { |
332 | struct timeval tv; |
333 | gettimeofday(&tv, 0); |
334 | tv.tv_sec += t; |
335 | sel_addtimer(&sel, &pp->timer, &tv, p_timer, pp); |
336 | } |
337 | |
338 | /* --- Link the block into the chain --- */ |
339 | |
340 | pp->next = P_ROOT; |
341 | pp->prev = P_ROOT->prev; |
342 | P_ROOT->prev->next = pp; |
343 | P_ROOT->prev = pp; |
344 | return (pp); |
345 | } |
346 | |
347 | /* --- @p_flush@ --- * |
348 | * |
349 | * Arguments: @const char *tag@ = pointer to tag string, or zero for all |
350 | * |
351 | * Returns: --- |
352 | * |
353 | * Use: Immediately flushes either a single phrase or all of them. |
354 | */ |
355 | |
356 | static void p_flush(const char *tag) |
357 | { |
358 | phrase *p; |
359 | |
360 | if (!tag && verbose > 1) |
361 | log("flushing all passphrases"); |
52b8f75d |
362 | p = P_ROOT->next; |
363 | while (p != P_ROOT) { |
364 | phrase *pp = p->next; |
069c185c |
365 | if (!tag) |
366 | p_free(p); |
367 | else if (strcmp(p->tag, tag) == 0) { |
368 | if (verbose > 1) |
369 | log("flushing passphrase `%s'", tag); |
370 | p_free(p); |
371 | break; |
372 | } |
52b8f75d |
373 | p = pp; |
069c185c |
374 | } |
375 | } |
376 | |
377 | /*----- Reading passphrases -----------------------------------------------*/ |
378 | |
379 | /* --- @p_request@ --- * |
380 | * |
381 | * Arguments: @const char *msg@ = message string |
382 | * @const char *tag@ = pointer to tag string |
383 | * @char *buf@ = pointer to (locked) buffer |
384 | * @size_t sz@ = size of buffer |
385 | * |
386 | * Returns: Zero if all went well, nonzero otherwise. |
387 | * |
388 | * Use: Requests a passphrase from the user. |
389 | */ |
390 | |
391 | static int p_request(const char *msg, const char *tag, char *buf, size_t sz) |
392 | { |
393 | /* --- If there's a passphrase-fetching command, run it --- */ |
394 | |
395 | if (command) { |
396 | dstr d = DSTR_INIT; |
397 | const char *p; |
398 | int fd[2]; |
399 | pid_t kid; |
400 | int r; |
4cb04adb |
401 | int rc; |
069c185c |
402 | |
403 | /* --- Substitute the prompt string into the command --- */ |
404 | |
405 | p = command; |
406 | for (;;) { |
407 | const char *q = strchr(p, '%'); |
408 | if (!q || !q[1]) { |
409 | DPUTS(&d, p); |
410 | break; |
411 | } |
412 | DPUTM(&d, p, q - p); |
413 | p = q + 1; |
414 | switch (*p) { |
415 | case 'm': |
416 | DPUTS(&d, msg); |
417 | break; |
418 | case 't': |
419 | DPUTS(&d, tag); |
420 | break; |
421 | default: |
422 | DPUTC(&d, '%'); |
423 | DPUTC(&d, *p); |
424 | break; |
425 | } |
426 | p++; |
427 | } |
428 | DPUTZ(&d); |
429 | |
430 | /* --- Create a pipe and start a child process --- */ |
431 | |
432 | if (pipe(fd)) |
433 | goto fail_1; |
434 | if ((kid = fork()) < 0) |
435 | goto fail_2; |
436 | |
437 | /* --- Child process --- */ |
438 | |
439 | fflush(0); |
440 | if (kid == 0) { |
441 | if (dup2(fd[1], STDOUT_FILENO) < 0) |
442 | _exit(127); |
443 | close(fd[0]); |
444 | execl("/bin/sh", "sh", "-c", d.buf, (void *)0); |
445 | _exit(127); |
446 | } |
447 | |
448 | /* --- Read the data back into my buffer --- */ |
449 | |
450 | close(fd[1]); |
451 | if ((r = read(fd[0], buf, sz - 1)) >= 0) { |
452 | char *q = memchr(buf, '\n', r); |
453 | if (!q) |
454 | q = buf + r; |
455 | *q = 0; |
456 | } |
457 | close(fd[0]); |
4cb04adb |
458 | waitpid(kid, &rc, 0); |
069c185c |
459 | dstr_destroy(&d); |
4cb04adb |
460 | if (r < 0 || rc != 0) |
069c185c |
461 | goto fail_0; |
6a2d21e4 |
462 | goto ok; |
069c185c |
463 | |
464 | /* --- Tidy up when things go wrong --- */ |
465 | |
466 | fail_2: |
467 | close(fd[0]); |
468 | close(fd[1]); |
469 | fail_1: |
470 | dstr_destroy(&d); |
471 | fail_0: |
472 | return (-1); |
473 | } |
474 | |
475 | /* --- Read a passphrase from the terminal --- * |
476 | * |
477 | * Use the standard Catacomb passphrase-reading function, so it'll read the |
478 | * passphrase from a file descriptor or something if the appropriate |
479 | * environment variable is set. |
480 | */ |
481 | |
482 | { |
483 | dstr d = DSTR_INIT; |
484 | int rc; |
485 | dstr_putf(&d, "%s %s: ", msg, tag); |
486 | rc = pixie_getpass(d.buf, buf, sz); |
487 | dstr_destroy(&d); |
6a2d21e4 |
488 | if (rc) |
489 | return (rc); |
490 | goto ok; |
069c185c |
491 | } |
6a2d21e4 |
492 | |
493 | /* --- Sort out the buffer --- * |
494 | * |
495 | * Strip leading spaces. |
496 | */ |
497 | |
498 | ok: { |
499 | char *p = buf; |
500 | size_t len; |
501 | while (isspace((unsigned char)*p)) |
502 | p++; |
503 | len = strlen(p); |
504 | memmove(buf, p, len); |
505 | p[len] = 0; |
506 | } |
507 | |
508 | /* --- Done --- */ |
509 | |
510 | return (0); |
069c185c |
511 | } |
512 | |
513 | /* --- @p_get@ --- * |
514 | * |
6a2d21e4 |
515 | * Arguments: @const char **q@ = where to store the result |
516 | * @const char *tag@ = pointer to tag string |
069c185c |
517 | * @unsigned mode@ = reading mode (verify?) |
518 | * @time_t exp@ = expiry time suggestion |
519 | * |
6a2d21e4 |
520 | * Returns: Zero if successful, @-1@ on a read failure, or @+1@ if the |
521 | * passphrase is missing and there is no fetcher. (This will |
522 | * always happen if there is no fetcher and @mode@ is |
523 | * @PMODE_VERIFY@. |
069c185c |
524 | * |
525 | * Use: Reads a passphrase from somewhere. |
526 | */ |
527 | |
6a2d21e4 |
528 | static int p_get(const char **q, const char *tag, unsigned mode, time_t exp) |
069c185c |
529 | { |
530 | #define LBUFSZ 1024 |
531 | |
532 | phrase *p; |
533 | char *pp = 0; |
534 | |
535 | /* --- Write a log message --- */ |
536 | |
537 | if (verbose > 1) |
538 | log("passphrase `%s' requested", tag); |
539 | |
6a2d21e4 |
540 | /* --- If there is no fetcher, life is simpler --- */ |
541 | |
542 | if (!(flags & F_FETCH)) { |
543 | if (mode == PMODE_VERIFY) |
544 | return (+1); |
545 | if ((p = p_find(tag)) == 0) |
546 | return (+1); |
547 | *q = p->p; |
548 | return (0); |
549 | } |
550 | |
069c185c |
551 | /* --- Try to find the phrase --- */ |
552 | |
6a2d21e4 |
553 | if (mode == PMODE_VERIFY) |
554 | p_flush(tag); |
555 | if (mode == PMODE_VERIFY || (p = p_find(tag)) == 0) { |
069c185c |
556 | if ((pp = p_alloc(LBUFSZ)) == 0) |
557 | goto fail; |
6a2d21e4 |
558 | if (p_request(mode == PMODE_READ ? "Passphrase" : "New passphrase", |
559 | tag, pp, LBUFSZ) < 0) |
069c185c |
560 | goto fail; |
561 | p = p_add(tag, pp, exp); |
562 | if (!p) |
563 | goto fail; |
564 | } |
565 | |
566 | /* --- If verification is requested, verify the passphrase --- */ |
567 | |
568 | if (mode == PMODE_VERIFY) { |
569 | if (!pp && (pp = p_alloc(LBUFSZ)) == 0) |
570 | goto fail; |
571 | if (p_request("Verify passphrase", tag, pp, LBUFSZ) < 0) |
572 | goto fail; |
573 | if (strcmp(pp, p->p) != 0) { |
574 | if (verbose) |
575 | log("passphrases for `%s' don't match", tag); |
576 | p_free(p); |
577 | goto fail; |
578 | } |
579 | } |
580 | |
581 | /* --- Tidy up and return the passphrase --- */ |
582 | |
583 | if (pp) { |
584 | memset(pp, 0, LBUFSZ); |
585 | l_free(&lm, pp); |
586 | } |
6a2d21e4 |
587 | *q = p->p; |
588 | return (0); |
069c185c |
589 | |
590 | /* --- Tidy up if things went wrong --- */ |
591 | |
592 | fail: |
593 | if (pp) { |
594 | memset(pp, 0, LBUFSZ); |
595 | l_free(&lm, pp); |
596 | } |
4cb04adb |
597 | return (-1); |
069c185c |
598 | |
599 | #undef LBUFSZ |
600 | } |
601 | |
602 | /*----- Server command parsing --------------------------------------------*/ |
603 | |
604 | /* --- Data structures --- */ |
605 | |
606 | typedef struct pixserv { |
607 | selbuf b; |
608 | int fd; |
609 | sel_timer timer; |
6a2d21e4 |
610 | unsigned f; |
069c185c |
611 | } pixserv; |
612 | |
9d23d982 |
613 | #define px_stdin 1u |
6a2d21e4 |
614 | |
615 | #define PIXSERV_TIMEOUT 30 |
069c185c |
616 | |
617 | /* --- @pixserv_expire@ --- * |
618 | * |
619 | * Arguments: @struct timeval *tv@ = pointer to current time |
620 | * @void *p@ = pointer to server block |
621 | * |
622 | * Returns: --- |
623 | * |
624 | * Use: Expires a pixie connection if the remote end decides he's not |
625 | * interested any more. |
626 | */ |
627 | |
628 | static void pixserv_expire(struct timeval *tv, void *p) |
629 | { |
630 | pixserv *px = p; |
631 | if (px->fd != px->b.reader.fd) |
632 | close(px->fd); |
6a2d21e4 |
633 | selbuf_destroy(&px->b); |
069c185c |
634 | close(px->b.reader.fd); |
635 | DESTROY(px); |
636 | } |
637 | |
638 | /* --- @pixserv_write@ --- * |
639 | * |
640 | * Arguments: @pixserv *px@ = pointer to server block |
641 | * @const char *p@ = pointer to skeleton string |
642 | * @...@ = other arguments to fill in |
643 | * |
644 | * Returns: --- |
645 | * |
646 | * Use: Formats a string and emits it to the output file. |
647 | */ |
648 | |
649 | static void pixserv_write(pixserv *px, const char *p, ...) |
650 | { |
651 | dstr d = DSTR_INIT; |
652 | va_list ap; |
653 | |
654 | va_start(ap, p); |
655 | dstr_vputf(&d, p, ap); |
656 | write(px->fd, d.buf, d.len); |
657 | va_end(ap); |
658 | dstr_destroy(&d); |
659 | } |
660 | |
661 | /* --- @pixserv_timeout@ --- * |
662 | * |
663 | * Arguments: @const char *p@ = pointer to timeout string |
664 | * |
665 | * Returns: Timeout in seconds. |
666 | * |
667 | * Use: Translates a string to a timeout value in seconds. |
668 | */ |
669 | |
670 | static unsigned long pixserv_timeout(const char *p) |
671 | { |
672 | unsigned long t; |
673 | char *q; |
674 | |
675 | if (!p) |
676 | return (timeout); |
677 | |
678 | t = strtoul(p, &q, 0); |
679 | switch (*q) { |
680 | case 'd': t *= 24; |
681 | case 'h': t *= 60; |
682 | case 'm': t *= 60; |
683 | case 's': if (q[1] != 0) |
684 | default: t = 0; |
685 | case 0: break; |
686 | } |
687 | return (t); |
688 | } |
689 | |
690 | /* --- @pixserv_line@ --- * |
691 | * |
692 | * Arguments: @char *s@ = pointer to the line read |
693 | * @void *p@ = pointer to server block |
694 | * |
695 | * Returns: --- |
696 | * |
697 | * Use: Handles a line read from the client. |
698 | */ |
699 | |
700 | static void pixserv_line(char *s, void *p) |
701 | { |
702 | pixserv *px = p; |
703 | char *q, *qq; |
704 | unsigned mode; |
705 | |
706 | /* --- Handle an end-of-file --- */ |
707 | |
6a2d21e4 |
708 | if (!(px->f & px_stdin)) |
709 | sel_rmtimer(&px->timer); |
069c185c |
710 | if (!s) { |
711 | if (px->fd != px->b.reader.fd) |
712 | close(px->fd); |
6a2d21e4 |
713 | selbuf_destroy(&px->b); |
069c185c |
714 | close(px->b.reader.fd); |
715 | return; |
716 | } |
717 | |
718 | /* --- Fiddle the timeout --- */ |
719 | |
6a2d21e4 |
720 | if (!(px->f & px_stdin)) { |
069c185c |
721 | struct timeval tv; |
722 | gettimeofday(&tv, 0); |
723 | tv.tv_sec += PIXSERV_TIMEOUT; |
724 | sel_addtimer(&sel, &px->timer, &tv, pixserv_expire, px); |
725 | } |
726 | |
727 | /* --- Scan out the first word --- */ |
728 | |
729 | if ((q = str_getword(&s)) == 0) |
730 | return; |
731 | for (qq = q; *qq; qq++) |
732 | *qq = tolower((unsigned char)*qq); |
733 | |
734 | /* --- Handle a help request --- */ |
735 | |
736 | if (strcmp(q, "help") == 0) { |
737 | pixserv_write(px, "\ |
738 | INFO Commands supported:\n\ |
739 | INFO HELP\n\ |
740 | INFO LIST\n\ |
741 | INFO PASS tag [expire]\n\ |
742 | INFO VERIFY tag [expire]\n\ |
743 | INFO FLUSH [tag]\n\ |
6a2d21e4 |
744 | INFO SET tag [expire] -- phrase\n\ |
069c185c |
745 | INFO QUIT\n\ |
746 | OK\n\ |
747 | "); |
748 | } |
749 | |
750 | /* --- List the passphrases --- */ |
751 | |
752 | else if (strcmp(q, "list") == 0) { |
753 | phrase *p; |
754 | |
755 | for (p = P_ROOT->next; p != P_ROOT; p = p->next) { |
756 | if (!p->t) |
757 | pixserv_write(px, "ITEM %s no-expire\n", p->tag); |
758 | else { |
759 | struct timeval tv; |
760 | gettimeofday(&tv, 0); |
761 | TV_SUB(&tv, &p->timer.tv, &tv); |
762 | pixserv_write(px, "ITEM %s %i\n", p->tag, tv.tv_sec); |
763 | } |
764 | } |
765 | pixserv_write(px, "OK\n"); |
766 | } |
767 | |
768 | /* --- Request a passphrase --- */ |
769 | |
770 | else if ((mode = PMODE_READ, strcmp(q, "pass") == 0) || |
771 | (mode = PMODE_VERIFY, strcmp(q, "verify") == 0)) { |
772 | unsigned long t; |
773 | const char *p; |
6a2d21e4 |
774 | int rc; |
069c185c |
775 | |
776 | if ((q = str_getword(&s)) == 0) |
777 | pixserv_write(px, "FAIL missing tag\n"); |
778 | else if ((t = pixserv_timeout(s)) == 0) |
779 | pixserv_write(px, "FAIL bad timeout\n"); |
6a2d21e4 |
780 | else { |
781 | rc = p_get(&p, q, mode, t > timeout ? timeout : t); |
782 | switch (rc) { |
783 | case 0: |
784 | pixserv_write(px, "OK %s\n", p); |
785 | break; |
786 | case -1: |
787 | pixserv_write(px, "FAIL error reading passphrase\n"); |
788 | break; |
789 | case +1: |
790 | pixserv_write(px, "MISSING\n"); |
791 | break; |
792 | } |
793 | } |
069c185c |
794 | } |
795 | |
796 | /* --- Flush existing passphrases --- */ |
797 | |
798 | else if (strcmp(q, "flush") == 0) { |
799 | q = str_getword(&s); |
800 | p_flush(q); |
801 | pixserv_write(px, "OK\n"); |
802 | } |
803 | |
6a2d21e4 |
804 | /* --- Set a passphrase --- */ |
805 | |
806 | else if (strcmp(q, "set") == 0) { |
807 | char *tag; |
808 | unsigned long t; |
809 | if ((tag = str_getword(&s)) == 0) |
810 | pixserv_write(px, "FAIL missing tag\n"); |
811 | else if ((q = str_getword(&s)) == 0) |
812 | pixserv_write(px, "FAIL no passphrase\n"); |
813 | else { |
814 | if (strcmp(q, "--") != 0) { |
815 | t = pixserv_timeout(q); |
816 | q = str_getword(&s); |
817 | } else |
818 | t = pixserv_timeout(0); |
819 | if (!q) |
820 | pixserv_write(px, "FAIL no passphrase\n"); |
821 | else if (strcmp(q, "--") != 0) |
822 | pixserv_write(px, "FAIL rubbish found before passphrase\n"); |
823 | else { |
824 | p_flush(tag); |
825 | p_add(tag, s, t); |
826 | pixserv_write(px, "OK\n"); |
827 | } |
828 | } |
829 | } |
830 | |
069c185c |
831 | /* --- Shut the server down --- */ |
832 | |
833 | else if (strcmp(q, "quit") == 0) { |
834 | if (verbose) |
6a2d21e4 |
835 | log("%s client requested shutdown", |
836 | px->f & px_stdin ? "local" : "remote"); |
069c185c |
837 | pixserv_write(px, "OK\n"); |
838 | exit(0); |
839 | } |
840 | |
841 | /* --- Report an error for other commands --- */ |
842 | |
843 | else |
844 | pixserv_write(px, "FAIL unknown command `%s'\n", q); |
845 | } |
846 | |
847 | /* --- @pixserv_create@ --- * |
848 | * |
849 | * Arguments: @int fd@ = file descriptor to read from |
850 | * @int ofd@ = file descriptor to write to |
851 | * |
6a2d21e4 |
852 | * Returns: Pointer to the new connection. |
069c185c |
853 | * |
854 | * Use: Creates a new Pixie server instance for a new connection. |
855 | */ |
856 | |
6a2d21e4 |
857 | static pixserv *pixserv_create(int fd, int ofd) |
069c185c |
858 | { |
859 | pixserv *px = CREATE(pixserv); |
860 | struct timeval tv; |
861 | fdflags(fd, O_NONBLOCK, O_NONBLOCK, FD_CLOEXEC, FD_CLOEXEC); |
862 | if (ofd != fd) |
863 | fdflags(ofd, O_NONBLOCK, O_NONBLOCK, FD_CLOEXEC, FD_CLOEXEC); |
864 | px->fd = ofd; |
865 | selbuf_init(&px->b, &sel, fd, pixserv_line, px); |
6a2d21e4 |
866 | px->b.b.a = arena_secure; |
867 | selbuf_setsize(&px->b, 1024); |
069c185c |
868 | gettimeofday(&tv, 0); |
869 | tv.tv_sec += PIXSERV_TIMEOUT; |
870 | sel_addtimer(&sel, &px->timer, &tv, pixserv_expire, px); |
6a2d21e4 |
871 | px->f = 0; |
872 | return (px); |
069c185c |
873 | } |
874 | |
875 | /* --- @pixserv_accept@ --- * |
876 | * |
877 | * Arguments: @int fd@ = file descriptor |
878 | * @unsigned mode@ = what's happened |
879 | * @void *p@ = an uninteresting argument |
880 | * |
881 | * Returns: --- |
882 | * |
883 | * Use: Accepts a new connection. |
884 | */ |
885 | |
886 | static void pixserv_accept(int fd, unsigned mode, void *p) |
887 | { |
888 | int nfd; |
889 | struct sockaddr_un sun; |
4933a180 |
890 | size_t sunsz = sizeof(sun); |
069c185c |
891 | |
892 | if (mode != SEL_READ) |
893 | return; |
894 | if ((nfd = accept(fd, (struct sockaddr *)&sun, &sunsz)) < 0) { |
895 | if (verbose) |
896 | log("new connection failed: %s", strerror(errno)); |
897 | return; |
898 | } |
899 | pixserv_create(nfd, nfd); |
900 | } |
901 | |
902 | /*----- Setting up the server ---------------------------------------------*/ |
903 | |
904 | /* --- @unlinksocket@ --- * |
905 | * |
906 | * Arguments: --- |
907 | * |
908 | * Returns: --- |
909 | * |
910 | * Use: Tidies up the socket when it's finished with. |
911 | */ |
912 | |
913 | static char *sockpath; |
914 | |
915 | static void unlinksocket(void) |
916 | { |
917 | unlink(sockpath); |
918 | l_purge(&lm); |
919 | } |
920 | |
921 | /* --- @pix_sigdie@ --- * |
922 | * |
923 | * Arguments: @int sig@ = signal number |
924 | * @void *p@ = uninteresting argument |
925 | * |
926 | * Returns: --- |
927 | * |
928 | * Use: Shuts down the program after a fatal signal. |
929 | */ |
930 | |
931 | static void pix_sigdie(int sig, void *p) |
932 | { |
933 | if (verbose) { |
934 | char *p; |
935 | char buf[20]; |
936 | |
937 | switch (sig) { |
938 | case SIGTERM: p = "SIGTERM"; break; |
939 | case SIGINT: p = "SIGINT"; break; |
940 | default: |
941 | sprintf(buf, "signal %i", sig); |
942 | p = buf; |
943 | break; |
944 | } |
945 | log("shutting down on %s", p); |
946 | } |
947 | exit(0); |
948 | } |
949 | |
950 | /* --- @pix_sigflush@ --- * |
951 | * |
952 | * Arguments: @int sig@ = signal number |
953 | * @void *p@ = uninteresting argument |
954 | * |
955 | * Returns: --- |
956 | * |
957 | * Use: Flushes the passphrase cache on receipt of a signal. |
958 | */ |
959 | |
960 | static void pix_sigflush(int sig, void *p) |
961 | { |
962 | if (verbose) { |
963 | char *p; |
964 | char buf[20]; |
965 | |
966 | switch (sig) { |
967 | case SIGHUP: p = "SIGHUP"; break; |
968 | case SIGQUIT: p = "SIGQUIT"; break; |
969 | default: |
970 | sprintf(buf, "signal %i", sig); |
971 | p = buf; |
972 | break; |
973 | } |
974 | log("received %s; flushing passphrases", p); |
975 | } |
976 | p_flush(0); |
977 | } |
978 | |
979 | /* --- @pix_setup@ --- * |
980 | * |
981 | * Arguments: @struct sockaddr_un *sun@ = pointer to address to use |
982 | * @size_t sz@ = size of socket address |
983 | * |
984 | * Returns: --- |
985 | * |
986 | * Use: Sets up the pixie's Unix-domain socket. |
987 | */ |
988 | |
989 | static void pix_setup(struct sockaddr_un *sun, size_t sz) |
990 | { |
991 | int fd; |
992 | |
993 | /* --- Set up the parent directory --- */ |
994 | |
995 | { |
069c185c |
996 | char *p = sun->sun_path; |
997 | char *q = strrchr(p, '/'); |
998 | |
999 | if (q) { |
4cb04adb |
1000 | dstr d = DSTR_INIT; |
069c185c |
1001 | struct stat st; |
1002 | |
1003 | DPUTM(&d, p, q - p); |
1004 | DPUTZ(&d); |
1005 | |
1006 | mkdir(d.buf, 0700); |
1007 | if (stat(d.buf, &st)) |
1008 | die(1, "couldn't stat `%s': %s", d.buf, strerror(errno)); |
4cb04adb |
1009 | if (!S_ISDIR(st.st_mode)) |
1010 | die(1, "object `%s' isn't a directory", d.buf); |
069c185c |
1011 | if (st.st_mode & 0077) |
1012 | die(1, "parent directory `%s' has group or world access", d.buf); |
4cb04adb |
1013 | dstr_destroy(&d); |
069c185c |
1014 | } |
1015 | } |
1016 | |
1017 | /* --- Initialize the socket --- */ |
1018 | |
1019 | { |
1020 | int n = 5; |
1021 | int e; |
1022 | |
1023 | umask(0077); |
1024 | again: |
1025 | if ((fd = socket(PF_UNIX, SOCK_STREAM, 0)) < 0) |
1026 | die(1, "couldn't create socket: %s", strerror(errno)); |
1027 | if (bind(fd, (struct sockaddr *)sun, sz) < 0) { |
1028 | e = errno; |
1029 | if (errno != EADDRINUSE) |
1030 | die(1, "couldn't bind to address: %s", strerror(e)); |
1031 | if (!n) |
1032 | die(1, "too many retries; giving up"); |
1033 | n--; |
1034 | if (connect(fd, (struct sockaddr *)sun, sz)) { |
4cb04adb |
1035 | struct stat st; |
069c185c |
1036 | if (errno != ECONNREFUSED) |
1037 | die(1, "couldn't bind to address: %s", strerror(e)); |
4cb04adb |
1038 | if (stat(sun->sun_path, &st)) |
1039 | die(1, "couldn't stat `%s': %s", sun->sun_path, strerror(errno)); |
1040 | if (!S_ISSOCK(st.st_mode)) |
1041 | die(1, "object `%s' isn't a socket", sun->sun_path); |
069c185c |
1042 | if (verbose) |
1043 | log("stale socket found; removing it"); |
1044 | unlink(sun->sun_path); |
1045 | close(fd); |
1046 | } else { |
1047 | if (verbose) |
1048 | log("server already running; shutting it down"); |
1049 | write(fd, "QUIT\n", 5); |
1050 | sleep(1); |
1051 | close(fd); |
1052 | } |
1053 | goto again; |
1054 | } |
1055 | chmod(sun->sun_path, 0600); |
1056 | fdflags(fd, O_NONBLOCK, O_NONBLOCK, FD_CLOEXEC, FD_CLOEXEC); |
1057 | if (listen(fd, 5)) |
1058 | die(1, "couldn't listen on socket: %s", strerror(errno)); |
1059 | } |
1060 | |
1061 | /* --- Set up the rest of the server --- */ |
1062 | |
1063 | { |
1064 | static sel_file serv; |
1065 | sockpath = sun->sun_path; |
1066 | atexit(unlinksocket); |
1067 | sel_initfile(&sel, &serv, fd, SEL_READ, pixserv_accept, 0); |
1068 | sel_addfile(&serv); |
1069 | } |
1070 | } |
1071 | |
1072 | /*----- Client support code -----------------------------------------------*/ |
1073 | |
1074 | /* --- Variables --- */ |
1075 | |
6a2d21e4 |
1076 | static selbuf c_server, c_client; |
4933a180 |
1077 | static unsigned c_flags = 0; |
9d23d982 |
1078 | |
1079 | #define cf_uclose 1u |
1080 | #define cf_sclose 2u |
069c185c |
1081 | |
1082 | /* --- Line handler functions --- */ |
1083 | |
1084 | static void c_uline(char *s, void *p) |
1085 | { |
1086 | size_t sz; |
6a2d21e4 |
1087 | if (!s) { |
1088 | selbuf_destroy(&c_client); |
1089 | shutdown(c_server.reader.fd, 1); |
1090 | c_flags |= cf_uclose; |
1091 | } else { |
1092 | sz = strlen(s); |
1093 | s[sz++] = '\n'; |
1094 | write(c_server.reader.fd, s, sz); |
1095 | } |
069c185c |
1096 | } |
1097 | |
1098 | static void c_sline(char *s, void *p) |
1099 | { |
1100 | if (!s) { |
6a2d21e4 |
1101 | selbuf_destroy(&c_server); |
1102 | if (!(c_flags & cf_uclose)) { |
069c185c |
1103 | moan("server closed the connection"); |
6a2d21e4 |
1104 | selbuf_destroy(&c_client); |
1105 | } |
069c185c |
1106 | exit(0); |
6a2d21e4 |
1107 | } else |
1108 | puts(s); |
069c185c |
1109 | } |
1110 | |
1111 | /* --- @pix_client@ --- * |
1112 | * |
1113 | * Arguments: @struct sockaddr_un *sun@ = pointer to socket address |
1114 | * @size_t sz@ = size of socket address |
1115 | * @char *argv[]@ = pointer to arguments to send |
1116 | * |
1117 | * Returns: --- |
1118 | * |
1119 | * Use: Performs client-side actions for the passphrase pixie. |
1120 | */ |
1121 | |
1122 | static void pix_client(struct sockaddr_un *sun, size_t sz, char *argv[]) |
1123 | { |
1124 | int fd; |
1125 | |
4cb04adb |
1126 | /* --- Dispose of locked memory --- */ |
1127 | |
1128 | l_destroy(&lm); |
1129 | |
069c185c |
1130 | /* --- Open the socket --- */ |
1131 | |
1132 | if ((fd = socket(PF_UNIX, SOCK_STREAM, 0)) < 0) |
1133 | die(1, "couldn't create socket: %s", strerror(errno)); |
1134 | if (connect(fd, (struct sockaddr *)sun, sz)) |
1135 | die(1, "couldn't connect to server: %s", strerror(errno)); |
1136 | selbuf_init(&c_server, &sel, fd, c_sline, 0); |
1137 | |
1138 | /* --- If there are any arguments, turn them into a string --- */ |
1139 | |
1140 | if (!*argv) |
1141 | selbuf_init(&c_client, &sel, STDIN_FILENO, c_uline, 0); |
1142 | else { |
1143 | dstr d = DSTR_INIT; |
1144 | DPUTS(&d, *argv++); |
1145 | while (*argv) { |
1146 | DPUTC(&d, ' '); |
1147 | DPUTS(&d, *argv++); |
1148 | } |
1149 | DPUTC(&d, '\n'); |
1150 | write(fd, d.buf, d.len); |
1151 | shutdown(fd, 1); |
4cb04adb |
1152 | c_flags |= cf_uclose; |
069c185c |
1153 | dstr_destroy(&d); |
1154 | } |
1155 | |
1156 | /* --- And repeat --- */ |
1157 | |
1158 | for (;;) |
1159 | sel_select(&sel); |
1160 | } |
1161 | |
1162 | /*----- Main code ---------------------------------------------------------*/ |
1163 | |
1164 | /* --- @help@, @version@, @usage@ --- * |
1165 | * |
1166 | * Arguments: @FILE *fp@ = stream to write on |
1167 | * |
1168 | * Returns: --- |
1169 | * |
1170 | * Use: Emit helpful messages. |
1171 | */ |
1172 | |
1173 | static void usage(FILE *fp) |
1174 | { |
1175 | pquis(fp, "\ |
1176 | Usage:\n\ |
4cb04adb |
1177 | $ [-qvfidl] [-c command] [-t timeout] [-s socket]\n\ |
069c185c |
1178 | $ [-s socket] -C [command args...]\n\ |
1179 | "); |
1180 | } |
1181 | |
1182 | static void version(FILE *fp) |
1183 | { |
1184 | pquis(fp, "$, Catacomb version " VERSION "\n"); |
1185 | } |
1186 | |
1187 | static void help(FILE *fp) |
1188 | { |
1189 | version(fp); |
1190 | fputc('\n', fp); |
1191 | usage(fp); |
1192 | pquis(fp, "\n\ |
1193 | The Catacomb passphrase pixie collects and caches passphrases used to\n\ |
1194 | protect important keys. Options provided:\n\ |
1195 | \n\ |
1196 | -h, --help Show this help text.\n\ |
1197 | -V, --version Show the program's version number.\n\ |
1198 | -u, --usage Show a (very) terse usage summary.\n\ |
1199 | \n\ |
1200 | -C, --client Connect to a running pixie as a client.\n\ |
1201 | \n\ |
1202 | -q, --quiet Emit fewer log messages.\n\ |
1203 | -v, --version Emit more log messages.\n\ |
1204 | -s, --socket=FILE Name the pixie's socket.\n\ |
1205 | -c, --command=COMMAND Shell command to read a passphrase.\n\ |
6a2d21e4 |
1206 | -f, --fetch Fetch passphrases from the terminal.\n\ |
069c185c |
1207 | -t, --timeout=TIMEOUT Length of time to retain a passphrase in memory.\n\ |
1208 | -i, --interactive Allow commands to be typed interactively.\n\ |
6a2d21e4 |
1209 | -d, --daemon Fork into the background after initialization.\n\ |
069c185c |
1210 | -l, --syslog Emit log messages to the system log.\n\ |
1211 | \n\ |
1212 | The COMMAND may contain `%m' and `%t' markers which are replaced by a\n\ |
1213 | prompt message and the passphrase tag respectively. The TIMEOUT is an\n\ |
1214 | integer, optionally followed by `d', `h', `m' or `s' to specify units of\n\ |
1215 | days, hours, minutes or seconds respectively.\n\ |
1216 | \n\ |
1217 | In client mode, if a command is specified on the command line, it is sent\n\ |
1218 | to the running server; otherwise the program reads requests from stdin.\n\ |
1219 | Responses from the pixie are written to stdout. Send a HELP request for\n\ |
1220 | a quick summary of the pixie communication protocol.\n\ |
1221 | "); |
1222 | } |
1223 | |
1224 | /* --- @main@ --- * |
1225 | * |
1226 | * Arguments: @int argc@ = number of arguments |
1227 | * @char *argv[]@ = vector of argument values |
1228 | * |
1229 | * Returns: Zero if OK. |
1230 | * |
1231 | * Use: Main program. Listens on a socket and responds with a PGP |
1232 | * passphrase when asked. |
1233 | */ |
1234 | |
1235 | int main(int argc, char *argv[]) |
1236 | { |
1237 | char *path = 0; |
1238 | struct sockaddr_un *sun; |
1239 | size_t sz; |
1240 | unsigned f = 0; |
1241 | |
16efd15b |
1242 | #define f_bogus 1u |
1243 | #define f_client 2u |
1244 | #define f_stdin 4u |
1245 | #define f_daemon 8u |
1246 | #define f_syslog 16u |
069c185c |
1247 | |
1248 | /* --- Initialize libraries --- */ |
1249 | |
1250 | ego(argv[0]); |
1251 | sub_init(); |
1252 | |
1253 | /* --- Set up the locked memory area --- */ |
1254 | |
6a2d21e4 |
1255 | l_init(&lm, 16384); |
069c185c |
1256 | setuid(getuid()); |
1257 | |
1258 | /* --- Parse command line arguments --- */ |
1259 | |
1260 | for (;;) { |
1261 | static struct option opts[] = { |
1262 | |
1263 | /* --- Standard GNUy help options --- */ |
1264 | |
1265 | { "help", 0, 0, 'h' }, |
1266 | { "version", 0, 0, 'V' }, |
1267 | { "usage", 0, 0, 'u' }, |
1268 | |
1269 | /* --- Other options --- */ |
1270 | |
1271 | { "quiet", 0, 0, 'q' }, |
1272 | { "verbose", 0, 0, 'v' }, |
1273 | { "client", 0, 0, 'C' }, |
1274 | { "socket", OPTF_ARGREQ, 0, 's' }, |
1275 | { "command", OPTF_ARGREQ, 0, 'c' }, |
6a2d21e4 |
1276 | { "fetch", 0, 0, 'f' }, |
069c185c |
1277 | { "timeout", OPTF_ARGREQ, 0, 't' }, |
1278 | { "interactive", 0, 0, 'i' }, |
1279 | { "stdin", 0, 0, 'i' }, |
1280 | { "daemon", 0, 0, 'd' }, |
1281 | { "log", 0, 0, 'l' }, |
1282 | { "syslog", 0, 0, 'l' }, |
1283 | |
1284 | /* --- Magic terminator --- */ |
1285 | |
1286 | { 0, 0, 0, 0 } |
1287 | }; |
1288 | |
6a2d21e4 |
1289 | int i = mdwopt(argc, argv, "hVuqvCs:c:ft:idl", opts, 0, 0, 0); |
069c185c |
1290 | if (i < 0) |
1291 | break; |
1292 | |
1293 | switch (i) { |
1294 | |
1295 | /* --- GNUy help options --- */ |
1296 | |
1297 | case 'h': |
1298 | help(stdout); |
1299 | exit(0); |
1300 | case 'V': |
1301 | version(stdout); |
1302 | exit(0); |
1303 | case 'u': |
1304 | usage(stdout); |
1305 | exit(0); |
1306 | |
1307 | /* --- Other interesting things --- */ |
1308 | |
1309 | case 'q': |
1310 | if (verbose) |
1311 | verbose--; |
1312 | break; |
1313 | case 'v': |
1314 | verbose++; |
1315 | break; |
1316 | case 'C': |
1317 | f |= f_client; |
1318 | break; |
1319 | case 's': |
1320 | path = optarg; |
1321 | break; |
1322 | case 't': |
1323 | if ((timeout = pixserv_timeout(optarg)) == 0) |
1324 | die(1, "bad timeout `%s'", optarg); |
1325 | break; |
1326 | case 'c': |
1327 | command = optarg; |
6a2d21e4 |
1328 | flags |= F_FETCH; |
1329 | break; |
1330 | case 'f': |
1331 | flags |= F_FETCH; |
069c185c |
1332 | break; |
1333 | case 'i': |
1334 | f |= f_stdin; |
1335 | break; |
1336 | case 'd': |
1337 | f |= f_daemon; |
1338 | break; |
1339 | case 'l': |
1340 | f |= f_syslog; |
1341 | break; |
1342 | |
1343 | /* --- Something else --- */ |
1344 | |
1345 | default: |
1346 | f |= f_bogus; |
1347 | break; |
1348 | } |
1349 | } |
1350 | |
1351 | if (f & f_bogus || (optind < argc && !(f & f_client))) { |
1352 | usage(stderr); |
1353 | exit(1); |
1354 | } |
1355 | |
1356 | /* --- Set up the socket address --- */ |
1357 | |
1358 | sun = pixie_address(path, &sz); |
1359 | |
1360 | /* --- Initialize selectory --- */ |
1361 | |
1362 | sel_init(&sel); |
1363 | signal(SIGPIPE, SIG_IGN); |
1364 | |
1365 | /* --- Be a client if a client's wanted --- */ |
1366 | |
1367 | if (f & f_client) |
1368 | pix_client(sun, sz, argv + optind); |
1369 | |
1370 | /* --- Open the syslog if requested --- */ |
1371 | |
1372 | if (f & f_syslog) { |
1373 | flags |= F_SYSLOG; |
1374 | openlog(QUIS, 0, LOG_DAEMON); |
1375 | } |
1376 | |
1377 | /* --- Check on the locked memory area --- */ |
1378 | |
1379 | { |
1380 | dstr d = DSTR_INIT; |
1381 | int rc = l_report(&lm, &d); |
1382 | if (rc < 0) |
1383 | die(EXIT_FAILURE, d.buf); |
1384 | else if (rc && verbose) { |
1385 | log(d.buf); |
1386 | log("couldn't lock passphrase buffer"); |
1387 | } |
1388 | dstr_destroy(&d); |
6a2d21e4 |
1389 | arena_setsecure(&lm.a); |
069c185c |
1390 | } |
1391 | |
1392 | /* --- Set signal behaviours --- */ |
1393 | |
1394 | { |
1395 | static sig sigint, sigterm, sigquit, sighup; |
2c41d513 |
1396 | struct sigaction sa; |
069c185c |
1397 | sig_init(&sel); |
2c41d513 |
1398 | sigaction(SIGINT, 0, &sa); |
1399 | if (sa.sa_handler != SIG_IGN) |
1400 | sig_add(&sigint, SIGINT, pix_sigdie, 0); |
069c185c |
1401 | sig_add(&sigterm, SIGTERM, pix_sigdie, 0); |
1402 | sig_add(&sigquit, SIGQUIT, pix_sigflush, 0); |
1403 | sig_add(&sighup, SIGHUP, pix_sigflush, 0); |
1404 | } |
1405 | |
1406 | /* --- Set up the server --- */ |
1407 | |
1408 | pix_setup(sun, sz); |
6a2d21e4 |
1409 | if (f & f_stdin) { |
1410 | pixserv *px = pixserv_create(STDIN_FILENO, STDOUT_FILENO); |
1411 | sel_rmtimer(&px->timer); |
1412 | px->f |= px_stdin; |
1413 | } |
069c185c |
1414 | |
1415 | /* --- Fork into the background if requested --- */ |
1416 | |
1417 | if (f & f_daemon) { |
1418 | pid_t kid; |
1419 | |
1420 | if (((f & f_stdin) && |
1421 | (isatty(STDIN_FILENO) || isatty(STDOUT_FILENO))) || |
6a2d21e4 |
1422 | (!command && (flags & F_FETCH))) |
069c185c |
1423 | die(1, "can't become a daemon if terminal required"); |
1424 | |
1425 | if ((kid = fork()) < 0) |
1426 | die(1, "fork failed: %s", strerror(errno)); |
1427 | if (kid) |
1428 | _exit(0); |
1429 | #ifdef TIOCNOTTY |
1430 | { |
1431 | int fd; |
1432 | if ((fd = open("/dev/tty", O_RDONLY)) >= 0) { |
1433 | ioctl(fd, TIOCNOTTY); |
1434 | close(fd); |
1435 | } |
1436 | } |
1437 | #endif |
4cb04adb |
1438 | chdir("/"); |
069c185c |
1439 | setsid(); |
1440 | |
2c41d513 |
1441 | if (fork() >= 0) |
069c185c |
1442 | _exit(0); |
1443 | } |
1444 | |
2b2d07ca |
1445 | if (verbose) |
1446 | log("initialized ok"); |
2c41d513 |
1447 | |
1448 | { |
1449 | int selerr = 0; |
1450 | for (;;) { |
1451 | if (!sel_select(&sel)) |
1452 | selerr = 0; |
1453 | else if (errno != EINTR && errno != EAGAIN) { |
1454 | log("error from select: %s", strerror(errno)); |
1455 | selerr++; |
1456 | if (selerr > 8) { |
1457 | log("too many consecutive select errors: bailing out"); |
1458 | exit(EXIT_FAILURE); |
1459 | } |
1460 | } |
1461 | } |
1462 | } |
069c185c |
1463 | return (0); |
1464 | } |
1465 | |
1466 | /*----- That's all, folks -------------------------------------------------*/ |