069c185c |
1 | /* -*-c-*- |
2 | * |
81b5dd60 |
3 | * $Id: pixie.c,v 1.10 2001/02/21 20:03:54 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 $ |
81b5dd60 |
33 | * Revision 1.10 2001/02/21 20:03:54 mdw |
34 | * Handle select errors (by bombing out). Cosmetic tweak. |
35 | * |
2c41d513 |
36 | * Revision 1.9 2001/02/03 16:06:44 mdw |
37 | * Don't set a handler for @SIGINT@ if it's ignored at startup. Add some |
38 | * error handling for the @select@ loop. |
39 | * |
9d23d982 |
40 | * Revision 1.8 2001/01/25 22:19:31 mdw |
41 | * Make flags be unsigned. |
42 | * |
16efd15b |
43 | * Revision 1.7 2000/12/06 20:33:27 mdw |
44 | * Make flags be macros rather than enumerations, to ensure that they're |
45 | * unsigned. |
46 | * |
4933a180 |
47 | * Revision 1.6 2000/10/08 12:06:46 mdw |
48 | * Change size passed to socket function to be a @size_t@. Insert missing |
49 | * type name for flag declaration. |
50 | * |
4cb04adb |
51 | * Revision 1.5 2000/07/29 22:05:22 mdw |
52 | * Miscellaneous tidyings: |
53 | * |
54 | * * Change the timeout to something more appropriate for real use. |
55 | * |
56 | * * Check assumptions about object types when binding the socket. In |
57 | * particular, don't zap the socket if it's really something else. |
58 | * |
59 | * * In @p_request@, return a failure if the shell command returned |
60 | * nonzero. Fix a bug in @p_get@ which incorrectly passes on a success |
61 | * code when this happens. |
62 | * |
63 | * * Dispose of the locked memory in client mode to avoid being |
64 | * antisocial. |
65 | * |
66 | * * Also in client mode, don't report closure from the server if we're |
67 | * running noninteractively. |
68 | * |
69 | * * Insert a missing option letter into the usage string. |
70 | * |
71 | * * Change to the root directory after forking in daemon mode. |
72 | * |
6a2d21e4 |
73 | * Revision 1.4 2000/06/17 11:50:53 mdw |
74 | * New pixie protocol allowing application to request passphrases and send |
75 | * them to the pixie. Use the secure arena interface for the input |
76 | * buffer. Extend the input buffer. Other minor fixes. |
77 | * |
2b2d07ca |
78 | * Revision 1.3 1999/12/22 22:14:40 mdw |
79 | * Only produce initialization message if verbose. |
80 | * |
52b8f75d |
81 | * Revision 1.2 1999/12/22 22:13:42 mdw |
82 | * Fix bug in passphrase flushing loop. |
83 | * |
069c185c |
84 | * Revision 1.1 1999/12/22 15:58:41 mdw |
85 | * Passphrase pixie support. |
86 | * |
87 | */ |
88 | |
89 | /*----- Header files ------------------------------------------------------*/ |
90 | |
91 | #include "config.h" |
92 | |
93 | #include <assert.h> |
94 | #include <ctype.h> |
95 | #include <errno.h> |
96 | #include <signal.h> |
97 | #include <stdarg.h> |
98 | #include <stddef.h> |
99 | #include <stdio.h> |
100 | #include <stdlib.h> |
101 | #include <string.h> |
102 | #include <time.h> |
103 | |
104 | #include <sys/types.h> |
105 | #include <sys/time.h> |
106 | #include <unistd.h> |
107 | #include <sys/stat.h> |
108 | #include <sys/wait.h> |
109 | #include <pwd.h> |
110 | #include <fcntl.h> |
111 | #include <sys/ioctl.h> |
112 | #include <termios.h> |
113 | #include <syslog.h> |
114 | |
115 | #include <sys/socket.h> |
116 | #include <sys/un.h> |
117 | |
118 | #include <mLib/alloc.h> |
119 | #include <mLib/dstr.h> |
120 | #include <mLib/fdflags.h> |
121 | #include <mLib/mdwopt.h> |
122 | #include <mLib/quis.h> |
123 | #include <mLib/report.h> |
124 | #include <mLib/sel.h> |
125 | #include <mLib/selbuf.h> |
126 | #include <mLib/sig.h> |
127 | #include <mLib/str.h> |
128 | #include <mLib/sub.h> |
129 | #include <mLib/tv.h> |
130 | |
6a2d21e4 |
131 | #include "arena.h" |
069c185c |
132 | #include "lmem.h" |
133 | #include "passphrase.h" |
134 | #include "pixie.h" |
135 | |
136 | /*----- Static variables --------------------------------------------------*/ |
137 | |
4cb04adb |
138 | static unsigned long timeout = 900; |
069c185c |
139 | static sel_state sel; |
140 | static unsigned verbose = 1; |
141 | static const char *command = 0; |
142 | static lmem lm; |
143 | static unsigned flags = 0; |
144 | |
16efd15b |
145 | #define F_SYSLOG 1u |
146 | #define F_FETCH 2u |
069c185c |
147 | |
148 | /*----- Event logging -----------------------------------------------------*/ |
149 | |
150 | /* --- @log@ --- * |
151 | * |
152 | * Arguments: @const char *p@ = @printf@-style format string |
153 | * @...@ = extra arguments to fill in |
154 | * |
155 | * Returns: --- |
156 | * |
157 | * Use: Writes out a timestamped log message. |
158 | */ |
159 | |
160 | static void log(const char *p, ...) |
161 | { |
162 | dstr d = DSTR_INIT; |
163 | va_list ap; |
164 | |
165 | if (!(flags & F_SYSLOG)) { |
166 | time_t t = time(0); |
167 | struct tm *tm = localtime(&t); |
168 | DENSURE(&d, 64); |
169 | d.len += strftime(d.buf, d.sz, "%Y-%m-%d %H:%M:%S ", tm); |
170 | } |
171 | va_start(ap, p); |
172 | dstr_vputf(&d, p, ap); |
173 | va_end(ap); |
174 | |
175 | if (flags & F_SYSLOG) |
176 | syslog(LOG_NOTICE, "%s", d.buf); |
177 | else { |
178 | DPUTC(&d, '\n'); |
179 | dstr_write(&d, stderr); |
180 | } |
181 | DDESTROY(&d); |
182 | } |
183 | |
184 | /*----- Passphrase management ---------------------------------------------*/ |
185 | |
186 | /* --- Data structures --- */ |
187 | |
188 | typedef struct phrase { |
189 | struct phrase *next; |
190 | struct phrase *prev; |
191 | char *tag; |
192 | char *p; |
193 | unsigned long t; |
194 | sel_timer timer; |
195 | unsigned f; |
196 | } phrase; |
197 | |
198 | /* --- Variables --- */ |
199 | |
200 | #define P_ROOT ((phrase *)&p_root) |
201 | static struct { phrase *next; phrase *prev; } p_root = { P_ROOT, P_ROOT }; |
202 | |
203 | /* --- @p_free@ --- * |
204 | * |
205 | * Arguments: @phrase *p@ = pointer to phrase block |
206 | * |
207 | * Returns: --- |
208 | * |
209 | * Use: Frees a phrase block. |
210 | */ |
211 | |
212 | static void p_free(phrase *p) |
213 | { |
214 | if (p->t) |
215 | sel_rmtimer(&p->timer); |
216 | free(p->tag); |
217 | l_free(&lm, p->p); |
218 | p->next->prev = p->prev; |
219 | p->prev->next = p->next; |
220 | DESTROY(p); |
221 | } |
222 | |
223 | /* --- @p_timer@ --- * |
224 | * |
225 | * Arguments: @struct timeval *tv@ = current time |
226 | * @void *p@ = pointer to phrase |
227 | * |
228 | * Returns: --- |
229 | * |
230 | * Use: Expires a passphrase. |
231 | */ |
232 | |
233 | static void p_timer(struct timeval *tv, void *p) |
234 | { |
235 | phrase *pp = p; |
236 | if (verbose) |
237 | log("expiring passphrase `%s'", pp->tag); |
238 | p_free(pp); |
239 | } |
240 | |
241 | /* --- @p_alloc@ --- * |
242 | * |
243 | * Arguments: @size_t sz@ = amount of memory required |
244 | * |
245 | * Returns: Pointer to allocated memory, or null. |
246 | * |
247 | * Use: Allocates some locked memory, flushing old passphrases if |
248 | * there's not enough space. |
249 | */ |
250 | |
251 | static void *p_alloc(size_t sz) |
252 | { |
253 | for (;;) { |
254 | char *p; |
255 | if ((p = l_alloc(&lm, sz)) != 0) |
256 | return (p); |
257 | if (P_ROOT->next == P_ROOT) |
258 | return (0); |
259 | if (verbose) { |
260 | log("flushing passphrase `%s' to free up needed space", |
261 | P_ROOT->next->tag); |
262 | } |
263 | p_free(P_ROOT->next); |
264 | } |
265 | } |
266 | |
267 | /* --- @p_find@ --- * |
268 | * |
269 | * Arguments: @const char *tag@ = pointer to tag to find |
270 | * |
271 | * Returns: Pointer to passphrase block, or null. |
272 | * |
273 | * Use: Finds a passphrase with a given tag. |
274 | */ |
275 | |
276 | static phrase *p_find(const char *tag) |
277 | { |
278 | phrase *p; |
279 | |
280 | for (p = P_ROOT->next; p != P_ROOT; p = p->next) { |
281 | if (strcmp(p->tag, tag) == 0) { |
282 | if (p->t) { |
283 | struct timeval tv; |
284 | sel_rmtimer(&p->timer); |
285 | gettimeofday(&tv, 0); |
286 | tv.tv_sec += p->t; |
287 | sel_addtimer(&sel, &p->timer, &tv, p_timer, p); |
288 | } |
289 | p->next->prev = p->prev; |
290 | p->prev->next = p->next; |
291 | p->next = P_ROOT; |
292 | p->prev = P_ROOT->prev; |
293 | P_ROOT->prev->next = p; |
294 | P_ROOT->prev = p; |
295 | return (p); |
296 | } |
297 | } |
298 | return (0); |
299 | } |
300 | |
301 | /* --- @p_add@ --- * |
302 | * |
303 | * Arguments: @const char *tag@ = pointer to tag string |
304 | * @const char *p@ = pointer to passphrase |
305 | * @unsigned long t@ = expiry timeout |
306 | * |
307 | * Returns: Pointer to newly-added passphrase. |
308 | * |
309 | * Use: Adds a new passphrase. The tag must not already exist. |
310 | */ |
311 | |
312 | static phrase *p_add(const char *tag, const char *p, unsigned long t) |
313 | { |
314 | size_t sz = strlen(p) + 1; |
315 | char *l = p_alloc(sz); |
316 | phrase *pp; |
317 | |
318 | /* --- Make sure the locked memory was allocated --- */ |
319 | |
320 | if (!l) |
321 | return (0); |
322 | |
323 | /* --- Fill in some other bits of the block --- */ |
324 | |
325 | pp = CREATE(phrase); |
326 | memcpy(l, p, sz); |
327 | pp->p = l; |
328 | pp->tag = xstrdup(tag); |
329 | pp->f = 0; |
330 | |
331 | /* --- Set the timer --- */ |
332 | |
333 | pp->t = t; |
334 | if (t) { |
335 | struct timeval tv; |
336 | gettimeofday(&tv, 0); |
337 | tv.tv_sec += t; |
338 | sel_addtimer(&sel, &pp->timer, &tv, p_timer, pp); |
339 | } |
340 | |
341 | /* --- Link the block into the chain --- */ |
342 | |
343 | pp->next = P_ROOT; |
344 | pp->prev = P_ROOT->prev; |
345 | P_ROOT->prev->next = pp; |
346 | P_ROOT->prev = pp; |
347 | return (pp); |
348 | } |
349 | |
350 | /* --- @p_flush@ --- * |
351 | * |
352 | * Arguments: @const char *tag@ = pointer to tag string, or zero for all |
353 | * |
354 | * Returns: --- |
355 | * |
356 | * Use: Immediately flushes either a single phrase or all of them. |
357 | */ |
358 | |
359 | static void p_flush(const char *tag) |
360 | { |
361 | phrase *p; |
362 | |
363 | if (!tag && verbose > 1) |
364 | log("flushing all passphrases"); |
52b8f75d |
365 | p = P_ROOT->next; |
366 | while (p != P_ROOT) { |
367 | phrase *pp = p->next; |
069c185c |
368 | if (!tag) |
369 | p_free(p); |
370 | else if (strcmp(p->tag, tag) == 0) { |
371 | if (verbose > 1) |
372 | log("flushing passphrase `%s'", tag); |
373 | p_free(p); |
374 | break; |
375 | } |
52b8f75d |
376 | p = pp; |
069c185c |
377 | } |
378 | } |
379 | |
380 | /*----- Reading passphrases -----------------------------------------------*/ |
381 | |
382 | /* --- @p_request@ --- * |
383 | * |
384 | * Arguments: @const char *msg@ = message string |
385 | * @const char *tag@ = pointer to tag string |
386 | * @char *buf@ = pointer to (locked) buffer |
387 | * @size_t sz@ = size of buffer |
388 | * |
389 | * Returns: Zero if all went well, nonzero otherwise. |
390 | * |
391 | * Use: Requests a passphrase from the user. |
392 | */ |
393 | |
394 | static int p_request(const char *msg, const char *tag, char *buf, size_t sz) |
395 | { |
396 | /* --- If there's a passphrase-fetching command, run it --- */ |
397 | |
398 | if (command) { |
399 | dstr d = DSTR_INIT; |
400 | const char *p; |
401 | int fd[2]; |
402 | pid_t kid; |
403 | int r; |
4cb04adb |
404 | int rc; |
069c185c |
405 | |
406 | /* --- Substitute the prompt string into the command --- */ |
407 | |
408 | p = command; |
409 | for (;;) { |
410 | const char *q = strchr(p, '%'); |
411 | if (!q || !q[1]) { |
412 | DPUTS(&d, p); |
413 | break; |
414 | } |
415 | DPUTM(&d, p, q - p); |
416 | p = q + 1; |
417 | switch (*p) { |
418 | case 'm': |
419 | DPUTS(&d, msg); |
420 | break; |
421 | case 't': |
422 | DPUTS(&d, tag); |
423 | break; |
424 | default: |
425 | DPUTC(&d, '%'); |
426 | DPUTC(&d, *p); |
427 | break; |
428 | } |
429 | p++; |
430 | } |
431 | DPUTZ(&d); |
432 | |
433 | /* --- Create a pipe and start a child process --- */ |
434 | |
435 | if (pipe(fd)) |
436 | goto fail_1; |
437 | if ((kid = fork()) < 0) |
438 | goto fail_2; |
439 | |
440 | /* --- Child process --- */ |
441 | |
442 | fflush(0); |
443 | if (kid == 0) { |
444 | if (dup2(fd[1], STDOUT_FILENO) < 0) |
445 | _exit(127); |
446 | close(fd[0]); |
447 | execl("/bin/sh", "sh", "-c", d.buf, (void *)0); |
448 | _exit(127); |
449 | } |
450 | |
451 | /* --- Read the data back into my buffer --- */ |
452 | |
453 | close(fd[1]); |
454 | if ((r = read(fd[0], buf, sz - 1)) >= 0) { |
455 | char *q = memchr(buf, '\n', r); |
456 | if (!q) |
457 | q = buf + r; |
458 | *q = 0; |
459 | } |
460 | close(fd[0]); |
4cb04adb |
461 | waitpid(kid, &rc, 0); |
069c185c |
462 | dstr_destroy(&d); |
4cb04adb |
463 | if (r < 0 || rc != 0) |
069c185c |
464 | goto fail_0; |
6a2d21e4 |
465 | goto ok; |
069c185c |
466 | |
467 | /* --- Tidy up when things go wrong --- */ |
468 | |
469 | fail_2: |
470 | close(fd[0]); |
471 | close(fd[1]); |
472 | fail_1: |
473 | dstr_destroy(&d); |
474 | fail_0: |
475 | return (-1); |
476 | } |
477 | |
478 | /* --- Read a passphrase from the terminal --- * |
479 | * |
480 | * Use the standard Catacomb passphrase-reading function, so it'll read the |
481 | * passphrase from a file descriptor or something if the appropriate |
482 | * environment variable is set. |
483 | */ |
484 | |
485 | { |
486 | dstr d = DSTR_INIT; |
487 | int rc; |
488 | dstr_putf(&d, "%s %s: ", msg, tag); |
489 | rc = pixie_getpass(d.buf, buf, sz); |
490 | dstr_destroy(&d); |
6a2d21e4 |
491 | if (rc) |
492 | return (rc); |
493 | goto ok; |
069c185c |
494 | } |
6a2d21e4 |
495 | |
496 | /* --- Sort out the buffer --- * |
497 | * |
498 | * Strip leading spaces. |
499 | */ |
500 | |
501 | ok: { |
502 | char *p = buf; |
503 | size_t len; |
504 | while (isspace((unsigned char)*p)) |
505 | p++; |
506 | len = strlen(p); |
507 | memmove(buf, p, len); |
508 | p[len] = 0; |
509 | } |
510 | |
511 | /* --- Done --- */ |
512 | |
513 | return (0); |
069c185c |
514 | } |
515 | |
516 | /* --- @p_get@ --- * |
517 | * |
6a2d21e4 |
518 | * Arguments: @const char **q@ = where to store the result |
519 | * @const char *tag@ = pointer to tag string |
069c185c |
520 | * @unsigned mode@ = reading mode (verify?) |
521 | * @time_t exp@ = expiry time suggestion |
522 | * |
6a2d21e4 |
523 | * Returns: Zero if successful, @-1@ on a read failure, or @+1@ if the |
524 | * passphrase is missing and there is no fetcher. (This will |
525 | * always happen if there is no fetcher and @mode@ is |
526 | * @PMODE_VERIFY@. |
069c185c |
527 | * |
528 | * Use: Reads a passphrase from somewhere. |
529 | */ |
530 | |
6a2d21e4 |
531 | static int p_get(const char **q, const char *tag, unsigned mode, time_t exp) |
069c185c |
532 | { |
533 | #define LBUFSZ 1024 |
534 | |
535 | phrase *p; |
536 | char *pp = 0; |
537 | |
538 | /* --- Write a log message --- */ |
539 | |
540 | if (verbose > 1) |
541 | log("passphrase `%s' requested", tag); |
542 | |
6a2d21e4 |
543 | /* --- If there is no fetcher, life is simpler --- */ |
544 | |
545 | if (!(flags & F_FETCH)) { |
546 | if (mode == PMODE_VERIFY) |
547 | return (+1); |
548 | if ((p = p_find(tag)) == 0) |
549 | return (+1); |
550 | *q = p->p; |
551 | return (0); |
552 | } |
553 | |
069c185c |
554 | /* --- Try to find the phrase --- */ |
555 | |
6a2d21e4 |
556 | if (mode == PMODE_VERIFY) |
557 | p_flush(tag); |
558 | if (mode == PMODE_VERIFY || (p = p_find(tag)) == 0) { |
069c185c |
559 | if ((pp = p_alloc(LBUFSZ)) == 0) |
560 | goto fail; |
6a2d21e4 |
561 | if (p_request(mode == PMODE_READ ? "Passphrase" : "New passphrase", |
562 | tag, pp, LBUFSZ) < 0) |
069c185c |
563 | goto fail; |
564 | p = p_add(tag, pp, exp); |
565 | if (!p) |
566 | goto fail; |
567 | } |
568 | |
569 | /* --- If verification is requested, verify the passphrase --- */ |
570 | |
571 | if (mode == PMODE_VERIFY) { |
572 | if (!pp && (pp = p_alloc(LBUFSZ)) == 0) |
573 | goto fail; |
574 | if (p_request("Verify passphrase", tag, pp, LBUFSZ) < 0) |
575 | goto fail; |
576 | if (strcmp(pp, p->p) != 0) { |
577 | if (verbose) |
578 | log("passphrases for `%s' don't match", tag); |
579 | p_free(p); |
580 | goto fail; |
581 | } |
582 | } |
583 | |
584 | /* --- Tidy up and return the passphrase --- */ |
585 | |
586 | if (pp) { |
587 | memset(pp, 0, LBUFSZ); |
588 | l_free(&lm, pp); |
589 | } |
6a2d21e4 |
590 | *q = p->p; |
591 | return (0); |
069c185c |
592 | |
593 | /* --- Tidy up if things went wrong --- */ |
594 | |
595 | fail: |
596 | if (pp) { |
597 | memset(pp, 0, LBUFSZ); |
598 | l_free(&lm, pp); |
599 | } |
4cb04adb |
600 | return (-1); |
069c185c |
601 | |
602 | #undef LBUFSZ |
603 | } |
604 | |
605 | /*----- Server command parsing --------------------------------------------*/ |
606 | |
607 | /* --- Data structures --- */ |
608 | |
609 | typedef struct pixserv { |
610 | selbuf b; |
611 | int fd; |
612 | sel_timer timer; |
6a2d21e4 |
613 | unsigned f; |
069c185c |
614 | } pixserv; |
615 | |
9d23d982 |
616 | #define px_stdin 1u |
6a2d21e4 |
617 | |
618 | #define PIXSERV_TIMEOUT 30 |
069c185c |
619 | |
620 | /* --- @pixserv_expire@ --- * |
621 | * |
622 | * Arguments: @struct timeval *tv@ = pointer to current time |
623 | * @void *p@ = pointer to server block |
624 | * |
625 | * Returns: --- |
626 | * |
627 | * Use: Expires a pixie connection if the remote end decides he's not |
628 | * interested any more. |
629 | */ |
630 | |
631 | static void pixserv_expire(struct timeval *tv, void *p) |
632 | { |
633 | pixserv *px = p; |
634 | if (px->fd != px->b.reader.fd) |
635 | close(px->fd); |
6a2d21e4 |
636 | selbuf_destroy(&px->b); |
069c185c |
637 | close(px->b.reader.fd); |
638 | DESTROY(px); |
639 | } |
640 | |
641 | /* --- @pixserv_write@ --- * |
642 | * |
643 | * Arguments: @pixserv *px@ = pointer to server block |
644 | * @const char *p@ = pointer to skeleton string |
645 | * @...@ = other arguments to fill in |
646 | * |
647 | * Returns: --- |
648 | * |
649 | * Use: Formats a string and emits it to the output file. |
650 | */ |
651 | |
652 | static void pixserv_write(pixserv *px, const char *p, ...) |
653 | { |
654 | dstr d = DSTR_INIT; |
655 | va_list ap; |
656 | |
657 | va_start(ap, p); |
658 | dstr_vputf(&d, p, ap); |
659 | write(px->fd, d.buf, d.len); |
660 | va_end(ap); |
661 | dstr_destroy(&d); |
662 | } |
663 | |
664 | /* --- @pixserv_timeout@ --- * |
665 | * |
666 | * Arguments: @const char *p@ = pointer to timeout string |
667 | * |
668 | * Returns: Timeout in seconds. |
669 | * |
670 | * Use: Translates a string to a timeout value in seconds. |
671 | */ |
672 | |
673 | static unsigned long pixserv_timeout(const char *p) |
674 | { |
675 | unsigned long t; |
676 | char *q; |
677 | |
678 | if (!p) |
679 | return (timeout); |
680 | |
681 | t = strtoul(p, &q, 0); |
682 | switch (*q) { |
683 | case 'd': t *= 24; |
684 | case 'h': t *= 60; |
685 | case 'm': t *= 60; |
686 | case 's': if (q[1] != 0) |
687 | default: t = 0; |
688 | case 0: break; |
689 | } |
690 | return (t); |
691 | } |
692 | |
693 | /* --- @pixserv_line@ --- * |
694 | * |
695 | * Arguments: @char *s@ = pointer to the line read |
696 | * @void *p@ = pointer to server block |
697 | * |
698 | * Returns: --- |
699 | * |
700 | * Use: Handles a line read from the client. |
701 | */ |
702 | |
703 | static void pixserv_line(char *s, void *p) |
704 | { |
705 | pixserv *px = p; |
706 | char *q, *qq; |
707 | unsigned mode; |
708 | |
709 | /* --- Handle an end-of-file --- */ |
710 | |
6a2d21e4 |
711 | if (!(px->f & px_stdin)) |
712 | sel_rmtimer(&px->timer); |
069c185c |
713 | if (!s) { |
714 | if (px->fd != px->b.reader.fd) |
715 | close(px->fd); |
6a2d21e4 |
716 | selbuf_destroy(&px->b); |
069c185c |
717 | close(px->b.reader.fd); |
718 | return; |
719 | } |
720 | |
721 | /* --- Fiddle the timeout --- */ |
722 | |
6a2d21e4 |
723 | if (!(px->f & px_stdin)) { |
069c185c |
724 | struct timeval tv; |
725 | gettimeofday(&tv, 0); |
726 | tv.tv_sec += PIXSERV_TIMEOUT; |
727 | sel_addtimer(&sel, &px->timer, &tv, pixserv_expire, px); |
728 | } |
729 | |
730 | /* --- Scan out the first word --- */ |
731 | |
732 | if ((q = str_getword(&s)) == 0) |
733 | return; |
734 | for (qq = q; *qq; qq++) |
735 | *qq = tolower((unsigned char)*qq); |
736 | |
737 | /* --- Handle a help request --- */ |
738 | |
739 | if (strcmp(q, "help") == 0) { |
740 | pixserv_write(px, "\ |
741 | INFO Commands supported:\n\ |
742 | INFO HELP\n\ |
743 | INFO LIST\n\ |
744 | INFO PASS tag [expire]\n\ |
745 | INFO VERIFY tag [expire]\n\ |
746 | INFO FLUSH [tag]\n\ |
6a2d21e4 |
747 | INFO SET tag [expire] -- phrase\n\ |
069c185c |
748 | INFO QUIT\n\ |
749 | OK\n\ |
750 | "); |
751 | } |
752 | |
753 | /* --- List the passphrases --- */ |
754 | |
755 | else if (strcmp(q, "list") == 0) { |
756 | phrase *p; |
757 | |
758 | for (p = P_ROOT->next; p != P_ROOT; p = p->next) { |
759 | if (!p->t) |
760 | pixserv_write(px, "ITEM %s no-expire\n", p->tag); |
761 | else { |
762 | struct timeval tv; |
763 | gettimeofday(&tv, 0); |
764 | TV_SUB(&tv, &p->timer.tv, &tv); |
765 | pixserv_write(px, "ITEM %s %i\n", p->tag, tv.tv_sec); |
766 | } |
767 | } |
768 | pixserv_write(px, "OK\n"); |
769 | } |
770 | |
771 | /* --- Request a passphrase --- */ |
772 | |
773 | else if ((mode = PMODE_READ, strcmp(q, "pass") == 0) || |
774 | (mode = PMODE_VERIFY, strcmp(q, "verify") == 0)) { |
775 | unsigned long t; |
776 | const char *p; |
6a2d21e4 |
777 | int rc; |
069c185c |
778 | |
779 | if ((q = str_getword(&s)) == 0) |
780 | pixserv_write(px, "FAIL missing tag\n"); |
781 | else if ((t = pixserv_timeout(s)) == 0) |
782 | pixserv_write(px, "FAIL bad timeout\n"); |
6a2d21e4 |
783 | else { |
784 | rc = p_get(&p, q, mode, t > timeout ? timeout : t); |
785 | switch (rc) { |
786 | case 0: |
787 | pixserv_write(px, "OK %s\n", p); |
788 | break; |
789 | case -1: |
790 | pixserv_write(px, "FAIL error reading passphrase\n"); |
791 | break; |
792 | case +1: |
793 | pixserv_write(px, "MISSING\n"); |
794 | break; |
795 | } |
796 | } |
069c185c |
797 | } |
798 | |
799 | /* --- Flush existing passphrases --- */ |
800 | |
801 | else if (strcmp(q, "flush") == 0) { |
802 | q = str_getword(&s); |
803 | p_flush(q); |
804 | pixserv_write(px, "OK\n"); |
805 | } |
806 | |
6a2d21e4 |
807 | /* --- Set a passphrase --- */ |
808 | |
809 | else if (strcmp(q, "set") == 0) { |
810 | char *tag; |
811 | unsigned long t; |
812 | if ((tag = str_getword(&s)) == 0) |
813 | pixserv_write(px, "FAIL missing tag\n"); |
814 | else if ((q = str_getword(&s)) == 0) |
815 | pixserv_write(px, "FAIL no passphrase\n"); |
816 | else { |
817 | if (strcmp(q, "--") != 0) { |
818 | t = pixserv_timeout(q); |
819 | q = str_getword(&s); |
820 | } else |
821 | t = pixserv_timeout(0); |
822 | if (!q) |
823 | pixserv_write(px, "FAIL no passphrase\n"); |
824 | else if (strcmp(q, "--") != 0) |
825 | pixserv_write(px, "FAIL rubbish found before passphrase\n"); |
826 | else { |
827 | p_flush(tag); |
828 | p_add(tag, s, t); |
829 | pixserv_write(px, "OK\n"); |
830 | } |
831 | } |
832 | } |
833 | |
069c185c |
834 | /* --- Shut the server down --- */ |
835 | |
836 | else if (strcmp(q, "quit") == 0) { |
837 | if (verbose) |
6a2d21e4 |
838 | log("%s client requested shutdown", |
839 | px->f & px_stdin ? "local" : "remote"); |
069c185c |
840 | pixserv_write(px, "OK\n"); |
841 | exit(0); |
842 | } |
843 | |
844 | /* --- Report an error for other commands --- */ |
845 | |
846 | else |
847 | pixserv_write(px, "FAIL unknown command `%s'\n", q); |
848 | } |
849 | |
850 | /* --- @pixserv_create@ --- * |
851 | * |
852 | * Arguments: @int fd@ = file descriptor to read from |
853 | * @int ofd@ = file descriptor to write to |
854 | * |
6a2d21e4 |
855 | * Returns: Pointer to the new connection. |
069c185c |
856 | * |
857 | * Use: Creates a new Pixie server instance for a new connection. |
858 | */ |
859 | |
6a2d21e4 |
860 | static pixserv *pixserv_create(int fd, int ofd) |
069c185c |
861 | { |
862 | pixserv *px = CREATE(pixserv); |
863 | struct timeval tv; |
864 | fdflags(fd, O_NONBLOCK, O_NONBLOCK, FD_CLOEXEC, FD_CLOEXEC); |
865 | if (ofd != fd) |
866 | fdflags(ofd, O_NONBLOCK, O_NONBLOCK, FD_CLOEXEC, FD_CLOEXEC); |
867 | px->fd = ofd; |
868 | selbuf_init(&px->b, &sel, fd, pixserv_line, px); |
6a2d21e4 |
869 | px->b.b.a = arena_secure; |
870 | selbuf_setsize(&px->b, 1024); |
069c185c |
871 | gettimeofday(&tv, 0); |
872 | tv.tv_sec += PIXSERV_TIMEOUT; |
873 | sel_addtimer(&sel, &px->timer, &tv, pixserv_expire, px); |
6a2d21e4 |
874 | px->f = 0; |
875 | return (px); |
069c185c |
876 | } |
877 | |
878 | /* --- @pixserv_accept@ --- * |
879 | * |
880 | * Arguments: @int fd@ = file descriptor |
881 | * @unsigned mode@ = what's happened |
882 | * @void *p@ = an uninteresting argument |
883 | * |
884 | * Returns: --- |
885 | * |
886 | * Use: Accepts a new connection. |
887 | */ |
888 | |
889 | static void pixserv_accept(int fd, unsigned mode, void *p) |
890 | { |
891 | int nfd; |
892 | struct sockaddr_un sun; |
4933a180 |
893 | size_t sunsz = sizeof(sun); |
069c185c |
894 | |
895 | if (mode != SEL_READ) |
896 | return; |
897 | if ((nfd = accept(fd, (struct sockaddr *)&sun, &sunsz)) < 0) { |
898 | if (verbose) |
899 | log("new connection failed: %s", strerror(errno)); |
900 | return; |
901 | } |
902 | pixserv_create(nfd, nfd); |
903 | } |
904 | |
905 | /*----- Setting up the server ---------------------------------------------*/ |
906 | |
907 | /* --- @unlinksocket@ --- * |
908 | * |
909 | * Arguments: --- |
910 | * |
911 | * Returns: --- |
912 | * |
913 | * Use: Tidies up the socket when it's finished with. |
914 | */ |
915 | |
916 | static char *sockpath; |
917 | |
918 | static void unlinksocket(void) |
919 | { |
920 | unlink(sockpath); |
921 | l_purge(&lm); |
922 | } |
923 | |
924 | /* --- @pix_sigdie@ --- * |
925 | * |
926 | * Arguments: @int sig@ = signal number |
927 | * @void *p@ = uninteresting argument |
928 | * |
929 | * Returns: --- |
930 | * |
931 | * Use: Shuts down the program after a fatal signal. |
932 | */ |
933 | |
934 | static void pix_sigdie(int sig, void *p) |
935 | { |
936 | if (verbose) { |
937 | char *p; |
938 | char buf[20]; |
939 | |
940 | switch (sig) { |
941 | case SIGTERM: p = "SIGTERM"; break; |
942 | case SIGINT: p = "SIGINT"; break; |
943 | default: |
944 | sprintf(buf, "signal %i", sig); |
945 | p = buf; |
946 | break; |
947 | } |
948 | log("shutting down on %s", p); |
949 | } |
950 | exit(0); |
951 | } |
952 | |
953 | /* --- @pix_sigflush@ --- * |
954 | * |
955 | * Arguments: @int sig@ = signal number |
956 | * @void *p@ = uninteresting argument |
957 | * |
958 | * Returns: --- |
959 | * |
960 | * Use: Flushes the passphrase cache on receipt of a signal. |
961 | */ |
962 | |
963 | static void pix_sigflush(int sig, void *p) |
964 | { |
965 | if (verbose) { |
966 | char *p; |
967 | char buf[20]; |
968 | |
969 | switch (sig) { |
970 | case SIGHUP: p = "SIGHUP"; break; |
971 | case SIGQUIT: p = "SIGQUIT"; break; |
972 | default: |
973 | sprintf(buf, "signal %i", sig); |
974 | p = buf; |
975 | break; |
976 | } |
977 | log("received %s; flushing passphrases", p); |
978 | } |
979 | p_flush(0); |
980 | } |
981 | |
982 | /* --- @pix_setup@ --- * |
983 | * |
984 | * Arguments: @struct sockaddr_un *sun@ = pointer to address to use |
985 | * @size_t sz@ = size of socket address |
986 | * |
987 | * Returns: --- |
988 | * |
989 | * Use: Sets up the pixie's Unix-domain socket. |
990 | */ |
991 | |
992 | static void pix_setup(struct sockaddr_un *sun, size_t sz) |
993 | { |
994 | int fd; |
995 | |
996 | /* --- Set up the parent directory --- */ |
997 | |
998 | { |
069c185c |
999 | char *p = sun->sun_path; |
1000 | char *q = strrchr(p, '/'); |
1001 | |
1002 | if (q) { |
4cb04adb |
1003 | dstr d = DSTR_INIT; |
069c185c |
1004 | struct stat st; |
1005 | |
1006 | DPUTM(&d, p, q - p); |
1007 | DPUTZ(&d); |
1008 | |
1009 | mkdir(d.buf, 0700); |
1010 | if (stat(d.buf, &st)) |
1011 | die(1, "couldn't stat `%s': %s", d.buf, strerror(errno)); |
4cb04adb |
1012 | if (!S_ISDIR(st.st_mode)) |
1013 | die(1, "object `%s' isn't a directory", d.buf); |
069c185c |
1014 | if (st.st_mode & 0077) |
1015 | die(1, "parent directory `%s' has group or world access", d.buf); |
4cb04adb |
1016 | dstr_destroy(&d); |
069c185c |
1017 | } |
1018 | } |
1019 | |
1020 | /* --- Initialize the socket --- */ |
1021 | |
1022 | { |
1023 | int n = 5; |
1024 | int e; |
1025 | |
1026 | umask(0077); |
1027 | again: |
1028 | if ((fd = socket(PF_UNIX, SOCK_STREAM, 0)) < 0) |
1029 | die(1, "couldn't create socket: %s", strerror(errno)); |
1030 | if (bind(fd, (struct sockaddr *)sun, sz) < 0) { |
1031 | e = errno; |
1032 | if (errno != EADDRINUSE) |
1033 | die(1, "couldn't bind to address: %s", strerror(e)); |
1034 | if (!n) |
1035 | die(1, "too many retries; giving up"); |
1036 | n--; |
1037 | if (connect(fd, (struct sockaddr *)sun, sz)) { |
4cb04adb |
1038 | struct stat st; |
069c185c |
1039 | if (errno != ECONNREFUSED) |
1040 | die(1, "couldn't bind to address: %s", strerror(e)); |
4cb04adb |
1041 | if (stat(sun->sun_path, &st)) |
1042 | die(1, "couldn't stat `%s': %s", sun->sun_path, strerror(errno)); |
1043 | if (!S_ISSOCK(st.st_mode)) |
1044 | die(1, "object `%s' isn't a socket", sun->sun_path); |
069c185c |
1045 | if (verbose) |
1046 | log("stale socket found; removing it"); |
1047 | unlink(sun->sun_path); |
1048 | close(fd); |
1049 | } else { |
1050 | if (verbose) |
1051 | log("server already running; shutting it down"); |
1052 | write(fd, "QUIT\n", 5); |
1053 | sleep(1); |
1054 | close(fd); |
1055 | } |
1056 | goto again; |
1057 | } |
1058 | chmod(sun->sun_path, 0600); |
1059 | fdflags(fd, O_NONBLOCK, O_NONBLOCK, FD_CLOEXEC, FD_CLOEXEC); |
1060 | if (listen(fd, 5)) |
1061 | die(1, "couldn't listen on socket: %s", strerror(errno)); |
1062 | } |
1063 | |
1064 | /* --- Set up the rest of the server --- */ |
1065 | |
1066 | { |
1067 | static sel_file serv; |
1068 | sockpath = sun->sun_path; |
1069 | atexit(unlinksocket); |
1070 | sel_initfile(&sel, &serv, fd, SEL_READ, pixserv_accept, 0); |
1071 | sel_addfile(&serv); |
1072 | } |
1073 | } |
1074 | |
1075 | /*----- Client support code -----------------------------------------------*/ |
1076 | |
1077 | /* --- Variables --- */ |
1078 | |
6a2d21e4 |
1079 | static selbuf c_server, c_client; |
4933a180 |
1080 | static unsigned c_flags = 0; |
9d23d982 |
1081 | |
1082 | #define cf_uclose 1u |
1083 | #define cf_sclose 2u |
069c185c |
1084 | |
1085 | /* --- Line handler functions --- */ |
1086 | |
1087 | static void c_uline(char *s, void *p) |
1088 | { |
1089 | size_t sz; |
6a2d21e4 |
1090 | if (!s) { |
1091 | selbuf_destroy(&c_client); |
1092 | shutdown(c_server.reader.fd, 1); |
1093 | c_flags |= cf_uclose; |
1094 | } else { |
1095 | sz = strlen(s); |
1096 | s[sz++] = '\n'; |
1097 | write(c_server.reader.fd, s, sz); |
1098 | } |
069c185c |
1099 | } |
1100 | |
1101 | static void c_sline(char *s, void *p) |
1102 | { |
1103 | if (!s) { |
6a2d21e4 |
1104 | selbuf_destroy(&c_server); |
1105 | if (!(c_flags & cf_uclose)) { |
069c185c |
1106 | moan("server closed the connection"); |
6a2d21e4 |
1107 | selbuf_destroy(&c_client); |
1108 | } |
069c185c |
1109 | exit(0); |
81b5dd60 |
1110 | } |
1111 | puts(s); |
069c185c |
1112 | } |
1113 | |
1114 | /* --- @pix_client@ --- * |
1115 | * |
1116 | * Arguments: @struct sockaddr_un *sun@ = pointer to socket address |
1117 | * @size_t sz@ = size of socket address |
1118 | * @char *argv[]@ = pointer to arguments to send |
1119 | * |
1120 | * Returns: --- |
1121 | * |
1122 | * Use: Performs client-side actions for the passphrase pixie. |
1123 | */ |
1124 | |
1125 | static void pix_client(struct sockaddr_un *sun, size_t sz, char *argv[]) |
1126 | { |
1127 | int fd; |
1128 | |
4cb04adb |
1129 | /* --- Dispose of locked memory --- */ |
1130 | |
1131 | l_destroy(&lm); |
1132 | |
069c185c |
1133 | /* --- Open the socket --- */ |
1134 | |
1135 | if ((fd = socket(PF_UNIX, SOCK_STREAM, 0)) < 0) |
1136 | die(1, "couldn't create socket: %s", strerror(errno)); |
1137 | if (connect(fd, (struct sockaddr *)sun, sz)) |
1138 | die(1, "couldn't connect to server: %s", strerror(errno)); |
1139 | selbuf_init(&c_server, &sel, fd, c_sline, 0); |
1140 | |
1141 | /* --- If there are any arguments, turn them into a string --- */ |
1142 | |
1143 | if (!*argv) |
1144 | selbuf_init(&c_client, &sel, STDIN_FILENO, c_uline, 0); |
1145 | else { |
1146 | dstr d = DSTR_INIT; |
1147 | DPUTS(&d, *argv++); |
1148 | while (*argv) { |
1149 | DPUTC(&d, ' '); |
1150 | DPUTS(&d, *argv++); |
1151 | } |
1152 | DPUTC(&d, '\n'); |
1153 | write(fd, d.buf, d.len); |
1154 | shutdown(fd, 1); |
4cb04adb |
1155 | c_flags |= cf_uclose; |
069c185c |
1156 | dstr_destroy(&d); |
1157 | } |
1158 | |
1159 | /* --- And repeat --- */ |
1160 | |
81b5dd60 |
1161 | for (;;) { |
1162 | if (sel_select(&sel)) |
1163 | die(EXIT_FAILURE, "select error: %s", strerror(errno)); |
1164 | } |
069c185c |
1165 | } |
1166 | |
1167 | /*----- Main code ---------------------------------------------------------*/ |
1168 | |
1169 | /* --- @help@, @version@, @usage@ --- * |
1170 | * |
1171 | * Arguments: @FILE *fp@ = stream to write on |
1172 | * |
1173 | * Returns: --- |
1174 | * |
1175 | * Use: Emit helpful messages. |
1176 | */ |
1177 | |
1178 | static void usage(FILE *fp) |
1179 | { |
1180 | pquis(fp, "\ |
1181 | Usage:\n\ |
4cb04adb |
1182 | $ [-qvfidl] [-c command] [-t timeout] [-s socket]\n\ |
069c185c |
1183 | $ [-s socket] -C [command args...]\n\ |
1184 | "); |
1185 | } |
1186 | |
1187 | static void version(FILE *fp) |
1188 | { |
1189 | pquis(fp, "$, Catacomb version " VERSION "\n"); |
1190 | } |
1191 | |
1192 | static void help(FILE *fp) |
1193 | { |
1194 | version(fp); |
1195 | fputc('\n', fp); |
1196 | usage(fp); |
1197 | pquis(fp, "\n\ |
1198 | The Catacomb passphrase pixie collects and caches passphrases used to\n\ |
1199 | protect important keys. Options provided:\n\ |
1200 | \n\ |
1201 | -h, --help Show this help text.\n\ |
1202 | -V, --version Show the program's version number.\n\ |
1203 | -u, --usage Show a (very) terse usage summary.\n\ |
1204 | \n\ |
1205 | -C, --client Connect to a running pixie as a client.\n\ |
1206 | \n\ |
1207 | -q, --quiet Emit fewer log messages.\n\ |
1208 | -v, --version Emit more log messages.\n\ |
1209 | -s, --socket=FILE Name the pixie's socket.\n\ |
1210 | -c, --command=COMMAND Shell command to read a passphrase.\n\ |
6a2d21e4 |
1211 | -f, --fetch Fetch passphrases from the terminal.\n\ |
069c185c |
1212 | -t, --timeout=TIMEOUT Length of time to retain a passphrase in memory.\n\ |
1213 | -i, --interactive Allow commands to be typed interactively.\n\ |
6a2d21e4 |
1214 | -d, --daemon Fork into the background after initialization.\n\ |
069c185c |
1215 | -l, --syslog Emit log messages to the system log.\n\ |
1216 | \n\ |
1217 | The COMMAND may contain `%m' and `%t' markers which are replaced by a\n\ |
1218 | prompt message and the passphrase tag respectively. The TIMEOUT is an\n\ |
1219 | integer, optionally followed by `d', `h', `m' or `s' to specify units of\n\ |
1220 | days, hours, minutes or seconds respectively.\n\ |
1221 | \n\ |
1222 | In client mode, if a command is specified on the command line, it is sent\n\ |
1223 | to the running server; otherwise the program reads requests from stdin.\n\ |
1224 | Responses from the pixie are written to stdout. Send a HELP request for\n\ |
1225 | a quick summary of the pixie communication protocol.\n\ |
1226 | "); |
1227 | } |
1228 | |
1229 | /* --- @main@ --- * |
1230 | * |
1231 | * Arguments: @int argc@ = number of arguments |
1232 | * @char *argv[]@ = vector of argument values |
1233 | * |
1234 | * Returns: Zero if OK. |
1235 | * |
1236 | * Use: Main program. Listens on a socket and responds with a PGP |
1237 | * passphrase when asked. |
1238 | */ |
1239 | |
1240 | int main(int argc, char *argv[]) |
1241 | { |
1242 | char *path = 0; |
1243 | struct sockaddr_un *sun; |
1244 | size_t sz; |
1245 | unsigned f = 0; |
1246 | |
16efd15b |
1247 | #define f_bogus 1u |
1248 | #define f_client 2u |
1249 | #define f_stdin 4u |
1250 | #define f_daemon 8u |
1251 | #define f_syslog 16u |
069c185c |
1252 | |
1253 | /* --- Initialize libraries --- */ |
1254 | |
1255 | ego(argv[0]); |
1256 | sub_init(); |
1257 | |
1258 | /* --- Set up the locked memory area --- */ |
1259 | |
6a2d21e4 |
1260 | l_init(&lm, 16384); |
069c185c |
1261 | setuid(getuid()); |
1262 | |
1263 | /* --- Parse command line arguments --- */ |
1264 | |
1265 | for (;;) { |
1266 | static struct option opts[] = { |
1267 | |
1268 | /* --- Standard GNUy help options --- */ |
1269 | |
1270 | { "help", 0, 0, 'h' }, |
1271 | { "version", 0, 0, 'V' }, |
1272 | { "usage", 0, 0, 'u' }, |
1273 | |
1274 | /* --- Other options --- */ |
1275 | |
1276 | { "quiet", 0, 0, 'q' }, |
1277 | { "verbose", 0, 0, 'v' }, |
1278 | { "client", 0, 0, 'C' }, |
1279 | { "socket", OPTF_ARGREQ, 0, 's' }, |
1280 | { "command", OPTF_ARGREQ, 0, 'c' }, |
6a2d21e4 |
1281 | { "fetch", 0, 0, 'f' }, |
069c185c |
1282 | { "timeout", OPTF_ARGREQ, 0, 't' }, |
1283 | { "interactive", 0, 0, 'i' }, |
1284 | { "stdin", 0, 0, 'i' }, |
1285 | { "daemon", 0, 0, 'd' }, |
1286 | { "log", 0, 0, 'l' }, |
1287 | { "syslog", 0, 0, 'l' }, |
1288 | |
1289 | /* --- Magic terminator --- */ |
1290 | |
1291 | { 0, 0, 0, 0 } |
1292 | }; |
1293 | |
6a2d21e4 |
1294 | int i = mdwopt(argc, argv, "hVuqvCs:c:ft:idl", opts, 0, 0, 0); |
069c185c |
1295 | if (i < 0) |
1296 | break; |
1297 | |
1298 | switch (i) { |
1299 | |
1300 | /* --- GNUy help options --- */ |
1301 | |
1302 | case 'h': |
1303 | help(stdout); |
1304 | exit(0); |
1305 | case 'V': |
1306 | version(stdout); |
1307 | exit(0); |
1308 | case 'u': |
1309 | usage(stdout); |
1310 | exit(0); |
1311 | |
1312 | /* --- Other interesting things --- */ |
1313 | |
1314 | case 'q': |
1315 | if (verbose) |
1316 | verbose--; |
1317 | break; |
1318 | case 'v': |
1319 | verbose++; |
1320 | break; |
1321 | case 'C': |
1322 | f |= f_client; |
1323 | break; |
1324 | case 's': |
1325 | path = optarg; |
1326 | break; |
1327 | case 't': |
1328 | if ((timeout = pixserv_timeout(optarg)) == 0) |
1329 | die(1, "bad timeout `%s'", optarg); |
1330 | break; |
1331 | case 'c': |
1332 | command = optarg; |
6a2d21e4 |
1333 | flags |= F_FETCH; |
1334 | break; |
1335 | case 'f': |
1336 | flags |= F_FETCH; |
069c185c |
1337 | break; |
1338 | case 'i': |
1339 | f |= f_stdin; |
1340 | break; |
1341 | case 'd': |
1342 | f |= f_daemon; |
1343 | break; |
1344 | case 'l': |
1345 | f |= f_syslog; |
1346 | break; |
1347 | |
1348 | /* --- Something else --- */ |
1349 | |
1350 | default: |
1351 | f |= f_bogus; |
1352 | break; |
1353 | } |
1354 | } |
1355 | |
1356 | if (f & f_bogus || (optind < argc && !(f & f_client))) { |
1357 | usage(stderr); |
1358 | exit(1); |
1359 | } |
1360 | |
1361 | /* --- Set up the socket address --- */ |
1362 | |
1363 | sun = pixie_address(path, &sz); |
1364 | |
1365 | /* --- Initialize selectory --- */ |
1366 | |
1367 | sel_init(&sel); |
1368 | signal(SIGPIPE, SIG_IGN); |
1369 | |
1370 | /* --- Be a client if a client's wanted --- */ |
1371 | |
1372 | if (f & f_client) |
1373 | pix_client(sun, sz, argv + optind); |
1374 | |
1375 | /* --- Open the syslog if requested --- */ |
1376 | |
1377 | if (f & f_syslog) { |
1378 | flags |= F_SYSLOG; |
1379 | openlog(QUIS, 0, LOG_DAEMON); |
1380 | } |
1381 | |
1382 | /* --- Check on the locked memory area --- */ |
1383 | |
1384 | { |
1385 | dstr d = DSTR_INIT; |
1386 | int rc = l_report(&lm, &d); |
1387 | if (rc < 0) |
1388 | die(EXIT_FAILURE, d.buf); |
1389 | else if (rc && verbose) { |
1390 | log(d.buf); |
1391 | log("couldn't lock passphrase buffer"); |
1392 | } |
1393 | dstr_destroy(&d); |
6a2d21e4 |
1394 | arena_setsecure(&lm.a); |
069c185c |
1395 | } |
1396 | |
1397 | /* --- Set signal behaviours --- */ |
1398 | |
1399 | { |
1400 | static sig sigint, sigterm, sigquit, sighup; |
2c41d513 |
1401 | struct sigaction sa; |
069c185c |
1402 | sig_init(&sel); |
2c41d513 |
1403 | sigaction(SIGINT, 0, &sa); |
1404 | if (sa.sa_handler != SIG_IGN) |
1405 | sig_add(&sigint, SIGINT, pix_sigdie, 0); |
069c185c |
1406 | sig_add(&sigterm, SIGTERM, pix_sigdie, 0); |
1407 | sig_add(&sigquit, SIGQUIT, pix_sigflush, 0); |
1408 | sig_add(&sighup, SIGHUP, pix_sigflush, 0); |
1409 | } |
1410 | |
1411 | /* --- Set up the server --- */ |
1412 | |
1413 | pix_setup(sun, sz); |
6a2d21e4 |
1414 | if (f & f_stdin) { |
1415 | pixserv *px = pixserv_create(STDIN_FILENO, STDOUT_FILENO); |
1416 | sel_rmtimer(&px->timer); |
1417 | px->f |= px_stdin; |
1418 | } |
069c185c |
1419 | |
1420 | /* --- Fork into the background if requested --- */ |
1421 | |
1422 | if (f & f_daemon) { |
1423 | pid_t kid; |
1424 | |
1425 | if (((f & f_stdin) && |
1426 | (isatty(STDIN_FILENO) || isatty(STDOUT_FILENO))) || |
6a2d21e4 |
1427 | (!command && (flags & F_FETCH))) |
069c185c |
1428 | die(1, "can't become a daemon if terminal required"); |
1429 | |
1430 | if ((kid = fork()) < 0) |
1431 | die(1, "fork failed: %s", strerror(errno)); |
1432 | if (kid) |
1433 | _exit(0); |
1434 | #ifdef TIOCNOTTY |
1435 | { |
1436 | int fd; |
1437 | if ((fd = open("/dev/tty", O_RDONLY)) >= 0) { |
1438 | ioctl(fd, TIOCNOTTY); |
1439 | close(fd); |
1440 | } |
1441 | } |
1442 | #endif |
4cb04adb |
1443 | chdir("/"); |
069c185c |
1444 | setsid(); |
1445 | |
2c41d513 |
1446 | if (fork() >= 0) |
069c185c |
1447 | _exit(0); |
1448 | } |
1449 | |
2b2d07ca |
1450 | if (verbose) |
1451 | log("initialized ok"); |
2c41d513 |
1452 | |
1453 | { |
1454 | int selerr = 0; |
1455 | for (;;) { |
1456 | if (!sel_select(&sel)) |
1457 | selerr = 0; |
1458 | else if (errno != EINTR && errno != EAGAIN) { |
1459 | log("error from select: %s", strerror(errno)); |
1460 | selerr++; |
1461 | if (selerr > 8) { |
1462 | log("too many consecutive select errors: bailing out"); |
1463 | exit(EXIT_FAILURE); |
1464 | } |
1465 | } |
1466 | } |
1467 | } |
069c185c |
1468 | return (0); |
1469 | } |
1470 | |
1471 | /*----- That's all, folks -------------------------------------------------*/ |