069c185c |
1 | /* -*-c-*- |
2 | * |
069c185c |
3 | * Passphrase pixie for Catacomb |
4 | * |
5 | * (c) 1999 Straylight/Edgeware |
6 | */ |
7 | |
45c0fd36 |
8 | /*----- Licensing notice --------------------------------------------------* |
069c185c |
9 | * |
10 | * This file is part of Catacomb. |
11 | * |
12 | * Catacomb is free software; you can redistribute it and/or modify |
13 | * it under the terms of the GNU Library General Public License as |
14 | * published by the Free Software Foundation; either version 2 of the |
15 | * License, or (at your option) any later version. |
45c0fd36 |
16 | * |
069c185c |
17 | * Catacomb is distributed in the hope that it will be useful, |
18 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
20 | * GNU Library General Public License for more details. |
45c0fd36 |
21 | * |
069c185c |
22 | * You should have received a copy of the GNU Library General Public |
23 | * License along with Catacomb; if not, write to the Free |
24 | * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, |
25 | * MA 02111-1307, USA. |
26 | */ |
27 | |
069c185c |
28 | /*----- Header files ------------------------------------------------------*/ |
29 | |
30 | #include "config.h" |
31 | |
32 | #include <assert.h> |
33 | #include <ctype.h> |
34 | #include <errno.h> |
35 | #include <signal.h> |
36 | #include <stdarg.h> |
37 | #include <stddef.h> |
38 | #include <stdio.h> |
39 | #include <stdlib.h> |
40 | #include <string.h> |
41 | #include <time.h> |
42 | |
43 | #include <sys/types.h> |
44 | #include <sys/time.h> |
45 | #include <unistd.h> |
46 | #include <sys/stat.h> |
47 | #include <sys/wait.h> |
48 | #include <pwd.h> |
49 | #include <fcntl.h> |
50 | #include <sys/ioctl.h> |
51 | #include <termios.h> |
52 | #include <syslog.h> |
53 | |
54 | #include <sys/socket.h> |
55 | #include <sys/un.h> |
56 | |
57 | #include <mLib/alloc.h> |
58 | #include <mLib/dstr.h> |
59 | #include <mLib/fdflags.h> |
60 | #include <mLib/mdwopt.h> |
61 | #include <mLib/quis.h> |
62 | #include <mLib/report.h> |
63 | #include <mLib/sel.h> |
64 | #include <mLib/selbuf.h> |
65 | #include <mLib/sig.h> |
66 | #include <mLib/str.h> |
67 | #include <mLib/sub.h> |
68 | #include <mLib/tv.h> |
69 | |
6a2d21e4 |
70 | #include "arena.h" |
069c185c |
71 | #include "lmem.h" |
72 | #include "passphrase.h" |
73 | #include "pixie.h" |
74 | |
75 | /*----- Static variables --------------------------------------------------*/ |
76 | |
4cb04adb |
77 | static unsigned long timeout = 900; |
069c185c |
78 | static sel_state sel; |
79 | static unsigned verbose = 1; |
80 | static const char *command = 0; |
81 | static lmem lm; |
82 | static unsigned flags = 0; |
83 | |
16efd15b |
84 | #define F_SYSLOG 1u |
85 | #define F_FETCH 2u |
069c185c |
86 | |
87 | /*----- Event logging -----------------------------------------------------*/ |
88 | |
89 | /* --- @log@ --- * |
90 | * |
91 | * Arguments: @const char *p@ = @printf@-style format string |
92 | * @...@ = extra arguments to fill in |
93 | * |
94 | * Returns: --- |
95 | * |
96 | * Use: Writes out a timestamped log message. |
97 | */ |
98 | |
99 | static void log(const char *p, ...) |
100 | { |
101 | dstr d = DSTR_INIT; |
102 | va_list ap; |
103 | |
104 | if (!(flags & F_SYSLOG)) { |
105 | time_t t = time(0); |
106 | struct tm *tm = localtime(&t); |
107 | DENSURE(&d, 64); |
108 | d.len += strftime(d.buf, d.sz, "%Y-%m-%d %H:%M:%S ", tm); |
109 | } |
110 | va_start(ap, p); |
5cf2e636 |
111 | dstr_vputf(&d, p, &ap); |
069c185c |
112 | va_end(ap); |
113 | |
114 | if (flags & F_SYSLOG) |
115 | syslog(LOG_NOTICE, "%s", d.buf); |
116 | else { |
117 | DPUTC(&d, '\n'); |
118 | dstr_write(&d, stderr); |
119 | } |
120 | DDESTROY(&d); |
121 | } |
122 | |
123 | /*----- Passphrase management ---------------------------------------------*/ |
124 | |
125 | /* --- Data structures --- */ |
126 | |
127 | typedef struct phrase { |
128 | struct phrase *next; |
129 | struct phrase *prev; |
130 | char *tag; |
131 | char *p; |
132 | unsigned long t; |
133 | sel_timer timer; |
134 | unsigned f; |
135 | } phrase; |
136 | |
137 | /* --- Variables --- */ |
138 | |
139 | #define P_ROOT ((phrase *)&p_root) |
140 | static struct { phrase *next; phrase *prev; } p_root = { P_ROOT, P_ROOT }; |
141 | |
142 | /* --- @p_free@ --- * |
143 | * |
144 | * Arguments: @phrase *p@ = pointer to phrase block |
145 | * |
146 | * Returns: --- |
147 | * |
148 | * Use: Frees a phrase block. |
149 | */ |
150 | |
151 | static void p_free(phrase *p) |
152 | { |
153 | if (p->t) |
154 | sel_rmtimer(&p->timer); |
12ed8a1f |
155 | xfree(p->tag); |
069c185c |
156 | l_free(&lm, p->p); |
157 | p->next->prev = p->prev; |
158 | p->prev->next = p->next; |
159 | DESTROY(p); |
160 | } |
161 | |
162 | /* --- @p_timer@ --- * |
163 | * |
164 | * Arguments: @struct timeval *tv@ = current time |
165 | * @void *p@ = pointer to phrase |
166 | * |
167 | * Returns: --- |
168 | * |
169 | * Use: Expires a passphrase. |
170 | */ |
171 | |
172 | static void p_timer(struct timeval *tv, void *p) |
173 | { |
174 | phrase *pp = p; |
175 | if (verbose) |
176 | log("expiring passphrase `%s'", pp->tag); |
177 | p_free(pp); |
178 | } |
179 | |
180 | /* --- @p_alloc@ --- * |
181 | * |
182 | * Arguments: @size_t sz@ = amount of memory required |
183 | * |
184 | * Returns: Pointer to allocated memory, or null. |
185 | * |
186 | * Use: Allocates some locked memory, flushing old passphrases if |
187 | * there's not enough space. |
188 | */ |
189 | |
190 | static void *p_alloc(size_t sz) |
191 | { |
192 | for (;;) { |
193 | char *p; |
194 | if ((p = l_alloc(&lm, sz)) != 0) |
195 | return (p); |
196 | if (P_ROOT->next == P_ROOT) |
197 | return (0); |
45c0fd36 |
198 | if (verbose) { |
069c185c |
199 | log("flushing passphrase `%s' to free up needed space", |
200 | P_ROOT->next->tag); |
201 | } |
202 | p_free(P_ROOT->next); |
203 | } |
204 | } |
205 | |
206 | /* --- @p_find@ --- * |
207 | * |
208 | * Arguments: @const char *tag@ = pointer to tag to find |
209 | * |
210 | * Returns: Pointer to passphrase block, or null. |
211 | * |
212 | * Use: Finds a passphrase with a given tag. |
213 | */ |
214 | |
215 | static phrase *p_find(const char *tag) |
216 | { |
217 | phrase *p; |
218 | |
219 | for (p = P_ROOT->next; p != P_ROOT; p = p->next) { |
220 | if (strcmp(p->tag, tag) == 0) { |
221 | if (p->t) { |
222 | struct timeval tv; |
223 | sel_rmtimer(&p->timer); |
224 | gettimeofday(&tv, 0); |
225 | tv.tv_sec += p->t; |
226 | sel_addtimer(&sel, &p->timer, &tv, p_timer, p); |
227 | } |
228 | p->next->prev = p->prev; |
229 | p->prev->next = p->next; |
230 | p->next = P_ROOT; |
231 | p->prev = P_ROOT->prev; |
232 | P_ROOT->prev->next = p; |
233 | P_ROOT->prev = p; |
234 | return (p); |
235 | } |
236 | } |
237 | return (0); |
238 | } |
239 | |
240 | /* --- @p_add@ --- * |
241 | * |
242 | * Arguments: @const char *tag@ = pointer to tag string |
243 | * @const char *p@ = pointer to passphrase |
244 | * @unsigned long t@ = expiry timeout |
245 | * |
246 | * Returns: Pointer to newly-added passphrase. |
247 | * |
248 | * Use: Adds a new passphrase. The tag must not already exist. |
249 | */ |
250 | |
251 | static phrase *p_add(const char *tag, const char *p, unsigned long t) |
252 | { |
253 | size_t sz = strlen(p) + 1; |
254 | char *l = p_alloc(sz); |
255 | phrase *pp; |
256 | |
257 | /* --- Make sure the locked memory was allocated --- */ |
258 | |
259 | if (!l) |
260 | return (0); |
261 | |
262 | /* --- Fill in some other bits of the block --- */ |
263 | |
264 | pp = CREATE(phrase); |
265 | memcpy(l, p, sz); |
266 | pp->p = l; |
267 | pp->tag = xstrdup(tag); |
268 | pp->f = 0; |
269 | |
270 | /* --- Set the timer --- */ |
271 | |
272 | pp->t = t; |
273 | if (t) { |
274 | struct timeval tv; |
275 | gettimeofday(&tv, 0); |
276 | tv.tv_sec += t; |
277 | sel_addtimer(&sel, &pp->timer, &tv, p_timer, pp); |
278 | } |
279 | |
280 | /* --- Link the block into the chain --- */ |
281 | |
282 | pp->next = P_ROOT; |
283 | pp->prev = P_ROOT->prev; |
284 | P_ROOT->prev->next = pp; |
285 | P_ROOT->prev = pp; |
286 | return (pp); |
287 | } |
288 | |
289 | /* --- @p_flush@ --- * |
290 | * |
291 | * Arguments: @const char *tag@ = pointer to tag string, or zero for all |
292 | * |
293 | * Returns: --- |
294 | * |
295 | * Use: Immediately flushes either a single phrase or all of them. |
296 | */ |
297 | |
298 | static void p_flush(const char *tag) |
299 | { |
300 | phrase *p; |
301 | |
302 | if (!tag && verbose > 1) |
303 | log("flushing all passphrases"); |
52b8f75d |
304 | p = P_ROOT->next; |
305 | while (p != P_ROOT) { |
306 | phrase *pp = p->next; |
069c185c |
307 | if (!tag) |
308 | p_free(p); |
309 | else if (strcmp(p->tag, tag) == 0) { |
310 | if (verbose > 1) |
311 | log("flushing passphrase `%s'", tag); |
312 | p_free(p); |
313 | break; |
314 | } |
52b8f75d |
315 | p = pp; |
069c185c |
316 | } |
317 | } |
318 | |
319 | /*----- Reading passphrases -----------------------------------------------*/ |
320 | |
321 | /* --- @p_request@ --- * |
322 | * |
323 | * Arguments: @const char *msg@ = message string |
324 | * @const char *tag@ = pointer to tag string |
325 | * @char *buf@ = pointer to (locked) buffer |
326 | * @size_t sz@ = size of buffer |
327 | * |
328 | * Returns: Zero if all went well, nonzero otherwise. |
329 | * |
330 | * Use: Requests a passphrase from the user. |
331 | */ |
332 | |
333 | static int p_request(const char *msg, const char *tag, char *buf, size_t sz) |
334 | { |
335 | /* --- If there's a passphrase-fetching command, run it --- */ |
336 | |
337 | if (command) { |
338 | dstr d = DSTR_INIT; |
339 | const char *p; |
340 | int fd[2]; |
341 | pid_t kid; |
342 | int r; |
4cb04adb |
343 | int rc; |
069c185c |
344 | |
345 | /* --- Substitute the prompt string into the command --- */ |
346 | |
347 | p = command; |
348 | for (;;) { |
349 | const char *q = strchr(p, '%'); |
350 | if (!q || !q[1]) { |
351 | DPUTS(&d, p); |
352 | break; |
353 | } |
354 | DPUTM(&d, p, q - p); |
355 | p = q + 1; |
356 | switch (*p) { |
357 | case 'm': |
358 | DPUTS(&d, msg); |
359 | break; |
360 | case 't': |
361 | DPUTS(&d, tag); |
362 | break; |
363 | default: |
364 | DPUTC(&d, '%'); |
365 | DPUTC(&d, *p); |
366 | break; |
367 | } |
368 | p++; |
369 | } |
370 | DPUTZ(&d); |
371 | |
372 | /* --- Create a pipe and start a child process --- */ |
373 | |
374 | if (pipe(fd)) |
375 | goto fail_1; |
376 | if ((kid = fork()) < 0) |
377 | goto fail_2; |
378 | |
379 | /* --- Child process --- */ |
380 | |
381 | fflush(0); |
382 | if (kid == 0) { |
383 | if (dup2(fd[1], STDOUT_FILENO) < 0) |
384 | _exit(127); |
385 | close(fd[0]); |
113e872f |
386 | execl("/bin/sh", "sh", "-c", d.buf, (char *)0); |
069c185c |
387 | _exit(127); |
388 | } |
389 | |
390 | /* --- Read the data back into my buffer --- */ |
391 | |
392 | close(fd[1]); |
393 | if ((r = read(fd[0], buf, sz - 1)) >= 0) { |
394 | char *q = memchr(buf, '\n', r); |
395 | if (!q) |
396 | q = buf + r; |
397 | *q = 0; |
398 | } |
399 | close(fd[0]); |
4cb04adb |
400 | waitpid(kid, &rc, 0); |
069c185c |
401 | dstr_destroy(&d); |
4cb04adb |
402 | if (r < 0 || rc != 0) |
069c185c |
403 | goto fail_0; |
6a2d21e4 |
404 | goto ok; |
069c185c |
405 | |
406 | /* --- Tidy up when things go wrong --- */ |
407 | |
408 | fail_2: |
409 | close(fd[0]); |
410 | close(fd[1]); |
411 | fail_1: |
412 | dstr_destroy(&d); |
413 | fail_0: |
414 | return (-1); |
415 | } |
416 | |
417 | /* --- Read a passphrase from the terminal --- * |
418 | * |
419 | * Use the standard Catacomb passphrase-reading function, so it'll read the |
420 | * passphrase from a file descriptor or something if the appropriate |
421 | * environment variable is set. |
422 | */ |
423 | |
424 | { |
425 | dstr d = DSTR_INIT; |
426 | int rc; |
427 | dstr_putf(&d, "%s %s: ", msg, tag); |
428 | rc = pixie_getpass(d.buf, buf, sz); |
429 | dstr_destroy(&d); |
6a2d21e4 |
430 | if (rc) |
431 | return (rc); |
432 | goto ok; |
069c185c |
433 | } |
6a2d21e4 |
434 | |
435 | /* --- Sort out the buffer --- * |
436 | * |
437 | * Strip leading spaces. |
438 | */ |
439 | |
440 | ok: { |
441 | char *p = buf; |
442 | size_t len; |
443 | while (isspace((unsigned char)*p)) |
444 | p++; |
445 | len = strlen(p); |
446 | memmove(buf, p, len); |
447 | p[len] = 0; |
448 | } |
449 | |
450 | /* --- Done --- */ |
451 | |
452 | return (0); |
069c185c |
453 | } |
454 | |
455 | /* --- @p_get@ --- * |
456 | * |
6a2d21e4 |
457 | * Arguments: @const char **q@ = where to store the result |
458 | * @const char *tag@ = pointer to tag string |
069c185c |
459 | * @unsigned mode@ = reading mode (verify?) |
460 | * @time_t exp@ = expiry time suggestion |
461 | * |
6a2d21e4 |
462 | * Returns: Zero if successful, @-1@ on a read failure, or @+1@ if the |
463 | * passphrase is missing and there is no fetcher. (This will |
464 | * always happen if there is no fetcher and @mode@ is |
465 | * @PMODE_VERIFY@. |
069c185c |
466 | * |
467 | * Use: Reads a passphrase from somewhere. |
468 | */ |
469 | |
6a2d21e4 |
470 | static int p_get(const char **q, const char *tag, unsigned mode, time_t exp) |
069c185c |
471 | { |
472 | #define LBUFSZ 1024 |
473 | |
474 | phrase *p; |
475 | char *pp = 0; |
476 | |
477 | /* --- Write a log message --- */ |
478 | |
479 | if (verbose > 1) |
480 | log("passphrase `%s' requested", tag); |
481 | |
6a2d21e4 |
482 | /* --- If there is no fetcher, life is simpler --- */ |
483 | |
484 | if (!(flags & F_FETCH)) { |
485 | if (mode == PMODE_VERIFY) |
486 | return (+1); |
487 | if ((p = p_find(tag)) == 0) |
488 | return (+1); |
489 | *q = p->p; |
490 | return (0); |
491 | } |
492 | |
069c185c |
493 | /* --- Try to find the phrase --- */ |
494 | |
6a2d21e4 |
495 | if (mode == PMODE_VERIFY) |
496 | p_flush(tag); |
497 | if (mode == PMODE_VERIFY || (p = p_find(tag)) == 0) { |
069c185c |
498 | if ((pp = p_alloc(LBUFSZ)) == 0) |
499 | goto fail; |
6a2d21e4 |
500 | if (p_request(mode == PMODE_READ ? "Passphrase" : "New passphrase", |
501 | tag, pp, LBUFSZ) < 0) |
069c185c |
502 | goto fail; |
503 | p = p_add(tag, pp, exp); |
504 | if (!p) |
505 | goto fail; |
506 | } |
507 | |
508 | /* --- If verification is requested, verify the passphrase --- */ |
509 | |
510 | if (mode == PMODE_VERIFY) { |
511 | if (!pp && (pp = p_alloc(LBUFSZ)) == 0) |
512 | goto fail; |
513 | if (p_request("Verify passphrase", tag, pp, LBUFSZ) < 0) |
514 | goto fail; |
515 | if (strcmp(pp, p->p) != 0) { |
516 | if (verbose) |
517 | log("passphrases for `%s' don't match", tag); |
518 | p_free(p); |
519 | goto fail; |
520 | } |
521 | } |
522 | |
523 | /* --- Tidy up and return the passphrase --- */ |
524 | |
525 | if (pp) { |
526 | memset(pp, 0, LBUFSZ); |
527 | l_free(&lm, pp); |
528 | } |
6a2d21e4 |
529 | *q = p->p; |
530 | return (0); |
069c185c |
531 | |
532 | /* --- Tidy up if things went wrong --- */ |
533 | |
534 | fail: |
535 | if (pp) { |
536 | memset(pp, 0, LBUFSZ); |
537 | l_free(&lm, pp); |
538 | } |
4cb04adb |
539 | return (-1); |
069c185c |
540 | |
541 | #undef LBUFSZ |
542 | } |
543 | |
544 | /*----- Server command parsing --------------------------------------------*/ |
545 | |
546 | /* --- Data structures --- */ |
547 | |
548 | typedef struct pixserv { |
549 | selbuf b; |
550 | int fd; |
551 | sel_timer timer; |
6a2d21e4 |
552 | unsigned f; |
069c185c |
553 | } pixserv; |
554 | |
9d23d982 |
555 | #define px_stdin 1u |
6a2d21e4 |
556 | |
557 | #define PIXSERV_TIMEOUT 30 |
069c185c |
558 | |
559 | /* --- @pixserv_expire@ --- * |
560 | * |
561 | * Arguments: @struct timeval *tv@ = pointer to current time |
562 | * @void *p@ = pointer to server block |
563 | * |
564 | * Returns: --- |
565 | * |
566 | * Use: Expires a pixie connection if the remote end decides he's not |
567 | * interested any more. |
568 | */ |
569 | |
570 | static void pixserv_expire(struct timeval *tv, void *p) |
571 | { |
572 | pixserv *px = p; |
573 | if (px->fd != px->b.reader.fd) |
574 | close(px->fd); |
6a2d21e4 |
575 | selbuf_destroy(&px->b); |
069c185c |
576 | close(px->b.reader.fd); |
577 | DESTROY(px); |
578 | } |
579 | |
580 | /* --- @pixserv_write@ --- * |
581 | * |
582 | * Arguments: @pixserv *px@ = pointer to server block |
583 | * @const char *p@ = pointer to skeleton string |
584 | * @...@ = other arguments to fill in |
585 | * |
586 | * Returns: --- |
587 | * |
588 | * Use: Formats a string and emits it to the output file. |
589 | */ |
590 | |
591 | static void pixserv_write(pixserv *px, const char *p, ...) |
592 | { |
593 | dstr d = DSTR_INIT; |
594 | va_list ap; |
595 | |
596 | va_start(ap, p); |
5cf2e636 |
597 | dstr_vputf(&d, p, &ap); |
069c185c |
598 | write(px->fd, d.buf, d.len); |
599 | va_end(ap); |
600 | dstr_destroy(&d); |
601 | } |
602 | |
603 | /* --- @pixserv_timeout@ --- * |
604 | * |
605 | * Arguments: @const char *p@ = pointer to timeout string |
606 | * |
607 | * Returns: Timeout in seconds. |
608 | * |
609 | * Use: Translates a string to a timeout value in seconds. |
610 | */ |
611 | |
612 | static unsigned long pixserv_timeout(const char *p) |
613 | { |
614 | unsigned long t; |
615 | char *q; |
616 | |
617 | if (!p) |
618 | return (timeout); |
619 | |
620 | t = strtoul(p, &q, 0); |
621 | switch (*q) { |
622 | case 'd': t *= 24; |
623 | case 'h': t *= 60; |
624 | case 'm': t *= 60; |
625 | case 's': if (q[1] != 0) |
45c0fd36 |
626 | default: t = 0; |
069c185c |
627 | case 0: break; |
628 | } |
629 | return (t); |
630 | } |
631 | |
632 | /* --- @pixserv_line@ --- * |
633 | * |
634 | * Arguments: @char *s@ = pointer to the line read |
5cf2e636 |
635 | * @size_t len@ = length of the line |
069c185c |
636 | * @void *p@ = pointer to server block |
637 | * |
638 | * Returns: --- |
639 | * |
640 | * Use: Handles a line read from the client. |
641 | */ |
642 | |
5cf2e636 |
643 | static void pixserv_line(char *s, size_t len, void *p) |
069c185c |
644 | { |
645 | pixserv *px = p; |
646 | char *q, *qq; |
647 | unsigned mode; |
648 | |
649 | /* --- Handle an end-of-file --- */ |
650 | |
6a2d21e4 |
651 | if (!(px->f & px_stdin)) |
652 | sel_rmtimer(&px->timer); |
069c185c |
653 | if (!s) { |
654 | if (px->fd != px->b.reader.fd) |
655 | close(px->fd); |
6a2d21e4 |
656 | selbuf_destroy(&px->b); |
069c185c |
657 | close(px->b.reader.fd); |
658 | return; |
659 | } |
660 | |
661 | /* --- Fiddle the timeout --- */ |
662 | |
6a2d21e4 |
663 | if (!(px->f & px_stdin)) { |
069c185c |
664 | struct timeval tv; |
665 | gettimeofday(&tv, 0); |
666 | tv.tv_sec += PIXSERV_TIMEOUT; |
667 | sel_addtimer(&sel, &px->timer, &tv, pixserv_expire, px); |
668 | } |
669 | |
670 | /* --- Scan out the first word --- */ |
671 | |
672 | if ((q = str_getword(&s)) == 0) |
673 | return; |
674 | for (qq = q; *qq; qq++) |
675 | *qq = tolower((unsigned char)*qq); |
676 | |
677 | /* --- Handle a help request --- */ |
678 | |
679 | if (strcmp(q, "help") == 0) { |
680 | pixserv_write(px, "\ |
681 | INFO Commands supported:\n\ |
682 | INFO HELP\n\ |
683 | INFO LIST\n\ |
684 | INFO PASS tag [expire]\n\ |
685 | INFO VERIFY tag [expire]\n\ |
686 | INFO FLUSH [tag]\n\ |
6a2d21e4 |
687 | INFO SET tag [expire] -- phrase\n\ |
069c185c |
688 | INFO QUIT\n\ |
689 | OK\n\ |
690 | "); |
691 | } |
692 | |
693 | /* --- List the passphrases --- */ |
694 | |
695 | else if (strcmp(q, "list") == 0) { |
696 | phrase *p; |
697 | |
698 | for (p = P_ROOT->next; p != P_ROOT; p = p->next) { |
699 | if (!p->t) |
700 | pixserv_write(px, "ITEM %s no-expire\n", p->tag); |
701 | else { |
702 | struct timeval tv; |
703 | gettimeofday(&tv, 0); |
704 | TV_SUB(&tv, &p->timer.tv, &tv); |
705 | pixserv_write(px, "ITEM %s %i\n", p->tag, tv.tv_sec); |
706 | } |
707 | } |
708 | pixserv_write(px, "OK\n"); |
709 | } |
710 | |
711 | /* --- Request a passphrase --- */ |
712 | |
713 | else if ((mode = PMODE_READ, strcmp(q, "pass") == 0) || |
714 | (mode = PMODE_VERIFY, strcmp(q, "verify") == 0)) { |
715 | unsigned long t; |
716 | const char *p; |
6a2d21e4 |
717 | int rc; |
069c185c |
718 | |
719 | if ((q = str_getword(&s)) == 0) |
720 | pixserv_write(px, "FAIL missing tag\n"); |
721 | else if ((t = pixserv_timeout(s)) == 0) |
722 | pixserv_write(px, "FAIL bad timeout\n"); |
6a2d21e4 |
723 | else { |
724 | rc = p_get(&p, q, mode, t > timeout ? timeout : t); |
725 | switch (rc) { |
726 | case 0: |
727 | pixserv_write(px, "OK %s\n", p); |
728 | break; |
729 | case -1: |
730 | pixserv_write(px, "FAIL error reading passphrase\n"); |
731 | break; |
732 | case +1: |
733 | pixserv_write(px, "MISSING\n"); |
734 | break; |
735 | } |
736 | } |
069c185c |
737 | } |
738 | |
739 | /* --- Flush existing passphrases --- */ |
740 | |
741 | else if (strcmp(q, "flush") == 0) { |
742 | q = str_getword(&s); |
743 | p_flush(q); |
744 | pixserv_write(px, "OK\n"); |
745 | } |
746 | |
6a2d21e4 |
747 | /* --- Set a passphrase --- */ |
748 | |
749 | else if (strcmp(q, "set") == 0) { |
750 | char *tag; |
751 | unsigned long t; |
752 | if ((tag = str_getword(&s)) == 0) |
753 | pixserv_write(px, "FAIL missing tag\n"); |
754 | else if ((q = str_getword(&s)) == 0) |
755 | pixserv_write(px, "FAIL no passphrase\n"); |
756 | else { |
757 | if (strcmp(q, "--") != 0) { |
758 | t = pixserv_timeout(q); |
759 | q = str_getword(&s); |
760 | } else |
761 | t = pixserv_timeout(0); |
762 | if (!q) |
763 | pixserv_write(px, "FAIL no passphrase\n"); |
764 | else if (strcmp(q, "--") != 0) |
765 | pixserv_write(px, "FAIL rubbish found before passphrase\n"); |
766 | else { |
767 | p_flush(tag); |
768 | p_add(tag, s, t); |
769 | pixserv_write(px, "OK\n"); |
770 | } |
771 | } |
772 | } |
773 | |
069c185c |
774 | /* --- Shut the server down --- */ |
775 | |
776 | else if (strcmp(q, "quit") == 0) { |
777 | if (verbose) |
6a2d21e4 |
778 | log("%s client requested shutdown", |
779 | px->f & px_stdin ? "local" : "remote"); |
069c185c |
780 | pixserv_write(px, "OK\n"); |
781 | exit(0); |
782 | } |
783 | |
784 | /* --- Report an error for other commands --- */ |
785 | |
786 | else |
787 | pixserv_write(px, "FAIL unknown command `%s'\n", q); |
788 | } |
789 | |
790 | /* --- @pixserv_create@ --- * |
791 | * |
792 | * Arguments: @int fd@ = file descriptor to read from |
793 | * @int ofd@ = file descriptor to write to |
794 | * |
6a2d21e4 |
795 | * Returns: Pointer to the new connection. |
069c185c |
796 | * |
797 | * Use: Creates a new Pixie server instance for a new connection. |
798 | */ |
799 | |
6a2d21e4 |
800 | static pixserv *pixserv_create(int fd, int ofd) |
069c185c |
801 | { |
802 | pixserv *px = CREATE(pixserv); |
803 | struct timeval tv; |
804 | fdflags(fd, O_NONBLOCK, O_NONBLOCK, FD_CLOEXEC, FD_CLOEXEC); |
805 | if (ofd != fd) |
806 | fdflags(ofd, O_NONBLOCK, O_NONBLOCK, FD_CLOEXEC, FD_CLOEXEC); |
807 | px->fd = ofd; |
808 | selbuf_init(&px->b, &sel, fd, pixserv_line, px); |
6a2d21e4 |
809 | px->b.b.a = arena_secure; |
810 | selbuf_setsize(&px->b, 1024); |
069c185c |
811 | gettimeofday(&tv, 0); |
812 | tv.tv_sec += PIXSERV_TIMEOUT; |
813 | sel_addtimer(&sel, &px->timer, &tv, pixserv_expire, px); |
6a2d21e4 |
814 | px->f = 0; |
815 | return (px); |
069c185c |
816 | } |
817 | |
818 | /* --- @pixserv_accept@ --- * |
819 | * |
820 | * Arguments: @int fd@ = file descriptor |
821 | * @unsigned mode@ = what's happened |
822 | * @void *p@ = an uninteresting argument |
823 | * |
824 | * Returns: --- |
825 | * |
826 | * Use: Accepts a new connection. |
827 | */ |
828 | |
829 | static void pixserv_accept(int fd, unsigned mode, void *p) |
830 | { |
831 | int nfd; |
832 | struct sockaddr_un sun; |
4933a180 |
833 | size_t sunsz = sizeof(sun); |
069c185c |
834 | |
835 | if (mode != SEL_READ) |
836 | return; |
837 | if ((nfd = accept(fd, (struct sockaddr *)&sun, &sunsz)) < 0) { |
962dd332 |
838 | if (verbose && errno != EAGAIN && errno != EWOULDBLOCK && |
839 | errno != ECONNABORTED && errno != EPROTO && errno != EINTR) |
069c185c |
840 | log("new connection failed: %s", strerror(errno)); |
841 | return; |
842 | } |
843 | pixserv_create(nfd, nfd); |
844 | } |
845 | |
846 | /*----- Setting up the server ---------------------------------------------*/ |
847 | |
848 | /* --- @unlinksocket@ --- * |
849 | * |
850 | * Arguments: --- |
851 | * |
852 | * Returns: --- |
853 | * |
854 | * Use: Tidies up the socket when it's finished with. |
855 | */ |
856 | |
857 | static char *sockpath; |
858 | |
859 | static void unlinksocket(void) |
860 | { |
861 | unlink(sockpath); |
862 | l_purge(&lm); |
863 | } |
864 | |
865 | /* --- @pix_sigdie@ --- * |
866 | * |
867 | * Arguments: @int sig@ = signal number |
868 | * @void *p@ = uninteresting argument |
869 | * |
870 | * Returns: --- |
871 | * |
872 | * Use: Shuts down the program after a fatal signal. |
873 | */ |
874 | |
875 | static void pix_sigdie(int sig, void *p) |
876 | { |
877 | if (verbose) { |
878 | char *p; |
879 | char buf[20]; |
880 | |
881 | switch (sig) { |
882 | case SIGTERM: p = "SIGTERM"; break; |
883 | case SIGINT: p = "SIGINT"; break; |
884 | default: |
885 | sprintf(buf, "signal %i", sig); |
886 | p = buf; |
887 | break; |
888 | } |
889 | log("shutting down on %s", p); |
890 | } |
891 | exit(0); |
892 | } |
893 | |
894 | /* --- @pix_sigflush@ --- * |
895 | * |
896 | * Arguments: @int sig@ = signal number |
897 | * @void *p@ = uninteresting argument |
898 | * |
899 | * Returns: --- |
900 | * |
901 | * Use: Flushes the passphrase cache on receipt of a signal. |
902 | */ |
903 | |
904 | static void pix_sigflush(int sig, void *p) |
905 | { |
906 | if (verbose) { |
907 | char *p; |
908 | char buf[20]; |
909 | |
910 | switch (sig) { |
911 | case SIGHUP: p = "SIGHUP"; break; |
912 | case SIGQUIT: p = "SIGQUIT"; break; |
913 | default: |
914 | sprintf(buf, "signal %i", sig); |
915 | p = buf; |
916 | break; |
917 | } |
918 | log("received %s; flushing passphrases", p); |
919 | } |
920 | p_flush(0); |
921 | } |
922 | |
923 | /* --- @pix_setup@ --- * |
924 | * |
925 | * Arguments: @struct sockaddr_un *sun@ = pointer to address to use |
926 | * @size_t sz@ = size of socket address |
927 | * |
928 | * Returns: --- |
929 | * |
930 | * Use: Sets up the pixie's Unix-domain socket. |
931 | */ |
932 | |
933 | static void pix_setup(struct sockaddr_un *sun, size_t sz) |
934 | { |
935 | int fd; |
936 | |
937 | /* --- Set up the parent directory --- */ |
938 | |
939 | { |
069c185c |
940 | char *p = sun->sun_path; |
941 | char *q = strrchr(p, '/'); |
942 | |
943 | if (q) { |
4cb04adb |
944 | dstr d = DSTR_INIT; |
069c185c |
945 | struct stat st; |
946 | |
947 | DPUTM(&d, p, q - p); |
948 | DPUTZ(&d); |
949 | |
950 | mkdir(d.buf, 0700); |
951 | if (stat(d.buf, &st)) |
952 | die(1, "couldn't stat `%s': %s", d.buf, strerror(errno)); |
4cb04adb |
953 | if (!S_ISDIR(st.st_mode)) |
954 | die(1, "object `%s' isn't a directory", d.buf); |
069c185c |
955 | if (st.st_mode & 0077) |
956 | die(1, "parent directory `%s' has group or world access", d.buf); |
4cb04adb |
957 | dstr_destroy(&d); |
069c185c |
958 | } |
959 | } |
960 | |
961 | /* --- Initialize the socket --- */ |
962 | |
963 | { |
964 | int n = 5; |
965 | int e; |
966 | |
967 | umask(0077); |
968 | again: |
969 | if ((fd = socket(PF_UNIX, SOCK_STREAM, 0)) < 0) |
970 | die(1, "couldn't create socket: %s", strerror(errno)); |
971 | if (bind(fd, (struct sockaddr *)sun, sz) < 0) { |
972 | e = errno; |
973 | if (errno != EADDRINUSE) |
974 | die(1, "couldn't bind to address: %s", strerror(e)); |
975 | if (!n) |
976 | die(1, "too many retries; giving up"); |
977 | n--; |
978 | if (connect(fd, (struct sockaddr *)sun, sz)) { |
4cb04adb |
979 | struct stat st; |
069c185c |
980 | if (errno != ECONNREFUSED) |
981 | die(1, "couldn't bind to address: %s", strerror(e)); |
4cb04adb |
982 | if (stat(sun->sun_path, &st)) |
983 | die(1, "couldn't stat `%s': %s", sun->sun_path, strerror(errno)); |
984 | if (!S_ISSOCK(st.st_mode)) |
985 | die(1, "object `%s' isn't a socket", sun->sun_path); |
069c185c |
986 | if (verbose) |
987 | log("stale socket found; removing it"); |
988 | unlink(sun->sun_path); |
989 | close(fd); |
990 | } else { |
991 | if (verbose) |
992 | log("server already running; shutting it down"); |
993 | write(fd, "QUIT\n", 5); |
994 | sleep(1); |
995 | close(fd); |
996 | } |
997 | goto again; |
998 | } |
999 | chmod(sun->sun_path, 0600); |
1000 | fdflags(fd, O_NONBLOCK, O_NONBLOCK, FD_CLOEXEC, FD_CLOEXEC); |
1001 | if (listen(fd, 5)) |
1002 | die(1, "couldn't listen on socket: %s", strerror(errno)); |
1003 | } |
1004 | |
1005 | /* --- Set up the rest of the server --- */ |
1006 | |
1007 | { |
1008 | static sel_file serv; |
1009 | sockpath = sun->sun_path; |
1010 | atexit(unlinksocket); |
1011 | sel_initfile(&sel, &serv, fd, SEL_READ, pixserv_accept, 0); |
1012 | sel_addfile(&serv); |
1013 | } |
1014 | } |
1015 | |
1016 | /*----- Client support code -----------------------------------------------*/ |
1017 | |
1018 | /* --- Variables --- */ |
1019 | |
6a2d21e4 |
1020 | static selbuf c_server, c_client; |
4933a180 |
1021 | static unsigned c_flags = 0; |
9d23d982 |
1022 | |
1023 | #define cf_uclose 1u |
1024 | #define cf_sclose 2u |
025c5f4a |
1025 | #define cf_cooked 4u |
069c185c |
1026 | |
1027 | /* --- Line handler functions --- */ |
1028 | |
5cf2e636 |
1029 | static void c_uline(char *s, size_t len, void *p) |
069c185c |
1030 | { |
6a2d21e4 |
1031 | if (!s) { |
1032 | selbuf_destroy(&c_client); |
1033 | shutdown(c_server.reader.fd, 1); |
1034 | c_flags |= cf_uclose; |
1035 | } else { |
5cf2e636 |
1036 | s[len++] = '\n'; |
1037 | write(c_server.reader.fd, s, len); |
6a2d21e4 |
1038 | } |
069c185c |
1039 | } |
1040 | |
5cf2e636 |
1041 | static void c_sline(char *s, size_t len, void *p) |
069c185c |
1042 | { |
1043 | if (!s) { |
6a2d21e4 |
1044 | selbuf_destroy(&c_server); |
1045 | if (!(c_flags & cf_uclose)) { |
069c185c |
1046 | moan("server closed the connection"); |
6a2d21e4 |
1047 | selbuf_destroy(&c_client); |
1048 | } |
069c185c |
1049 | exit(0); |
81b5dd60 |
1050 | } |
025c5f4a |
1051 | if (!(c_flags & cf_cooked)) |
1052 | puts(s); |
1053 | else { |
1054 | char *q = str_getword(&s); |
1055 | if (strcmp(q, "FAIL") == 0) |
599e2cbf |
1056 | die(1, "%s", s); |
025c5f4a |
1057 | else if (strcmp(q, "INFO") == 0 || |
1058 | strcmp(q, "ITEM") == 0) |
1059 | puts(s); |
1060 | else if (strcmp(q, "OK") == 0) { |
1061 | if (s && *s) puts(s); |
1062 | } else if (strcmp(q, "MISSING") == 0) |
1063 | ; |
1064 | else |
1065 | moan("unexpected output: %s %s", q, s); |
1066 | } |
069c185c |
1067 | } |
1068 | |
1069 | /* --- @pix_client@ --- * |
1070 | * |
1071 | * Arguments: @struct sockaddr_un *sun@ = pointer to socket address |
1072 | * @size_t sz@ = size of socket address |
1073 | * @char *argv[]@ = pointer to arguments to send |
1074 | * |
1075 | * Returns: --- |
1076 | * |
1077 | * Use: Performs client-side actions for the passphrase pixie. |
1078 | */ |
1079 | |
1080 | static void pix_client(struct sockaddr_un *sun, size_t sz, char *argv[]) |
1081 | { |
1082 | int fd; |
1083 | |
4cb04adb |
1084 | /* --- Dispose of locked memory --- */ |
1085 | |
1086 | l_destroy(&lm); |
1087 | |
069c185c |
1088 | /* --- Open the socket --- */ |
1089 | |
1090 | if ((fd = socket(PF_UNIX, SOCK_STREAM, 0)) < 0) |
1091 | die(1, "couldn't create socket: %s", strerror(errno)); |
1092 | if (connect(fd, (struct sockaddr *)sun, sz)) |
1093 | die(1, "couldn't connect to server: %s", strerror(errno)); |
1094 | selbuf_init(&c_server, &sel, fd, c_sline, 0); |
1095 | |
1096 | /* --- If there are any arguments, turn them into a string --- */ |
1097 | |
1098 | if (!*argv) |
1099 | selbuf_init(&c_client, &sel, STDIN_FILENO, c_uline, 0); |
1100 | else { |
1101 | dstr d = DSTR_INIT; |
1102 | DPUTS(&d, *argv++); |
1103 | while (*argv) { |
1104 | DPUTC(&d, ' '); |
1105 | DPUTS(&d, *argv++); |
1106 | } |
1107 | DPUTC(&d, '\n'); |
1108 | write(fd, d.buf, d.len); |
1109 | shutdown(fd, 1); |
025c5f4a |
1110 | c_flags |= cf_uclose | cf_cooked; |
069c185c |
1111 | dstr_destroy(&d); |
45c0fd36 |
1112 | } |
069c185c |
1113 | |
1114 | /* --- And repeat --- */ |
1115 | |
81b5dd60 |
1116 | for (;;) { |
1117 | if (sel_select(&sel)) |
1118 | die(EXIT_FAILURE, "select error: %s", strerror(errno)); |
1119 | } |
069c185c |
1120 | } |
1121 | |
1122 | /*----- Main code ---------------------------------------------------------*/ |
1123 | |
1124 | /* --- @help@, @version@, @usage@ --- * |
1125 | * |
1126 | * Arguments: @FILE *fp@ = stream to write on |
1127 | * |
1128 | * Returns: --- |
1129 | * |
1130 | * Use: Emit helpful messages. |
1131 | */ |
1132 | |
1133 | static void usage(FILE *fp) |
1134 | { |
1135 | pquis(fp, "\ |
1136 | Usage:\n\ |
a88abbcd |
1137 | $ [-qvfidl] [-c COMMAND] [-t TIMEOUT] [-s SOCKET]\n\ |
1138 | $ [-s SOCKET] -C [COMMAND ARGS...]\n\ |
025c5f4a |
1139 | $ [-s SOCKET] -P[P] TAG\n\ |
069c185c |
1140 | "); |
1141 | } |
1142 | |
1143 | static void version(FILE *fp) |
1144 | { |
1145 | pquis(fp, "$, Catacomb version " VERSION "\n"); |
1146 | } |
1147 | |
1148 | static void help(FILE *fp) |
1149 | { |
1150 | version(fp); |
1151 | fputc('\n', fp); |
1152 | usage(fp); |
1153 | pquis(fp, "\n\ |
1154 | The Catacomb passphrase pixie collects and caches passphrases used to\n\ |
1155 | protect important keys. Options provided:\n\ |
1156 | \n\ |
1157 | -h, --help Show this help text.\n\ |
1158 | -V, --version Show the program's version number.\n\ |
1159 | -u, --usage Show a (very) terse usage summary.\n\ |
1160 | \n\ |
1161 | -C, --client Connect to a running pixie as a client.\n\ |
025c5f4a |
1162 | -P, --passphrase Request passphrase TAG and print to stdout.\n\ |
1163 | -PP, --verify-passphrase\n\ |
1164 | Verify passphrase TAG and print to stdout.\n\ |
069c185c |
1165 | \n\ |
1166 | -q, --quiet Emit fewer log messages.\n\ |
1167 | -v, --version Emit more log messages.\n\ |
1168 | -s, --socket=FILE Name the pixie's socket.\n\ |
1169 | -c, --command=COMMAND Shell command to read a passphrase.\n\ |
6a2d21e4 |
1170 | -f, --fetch Fetch passphrases from the terminal.\n\ |
069c185c |
1171 | -t, --timeout=TIMEOUT Length of time to retain a passphrase in memory.\n\ |
1172 | -i, --interactive Allow commands to be typed interactively.\n\ |
6a2d21e4 |
1173 | -d, --daemon Fork into the background after initialization.\n\ |
069c185c |
1174 | -l, --syslog Emit log messages to the system log.\n\ |
1175 | \n\ |
1176 | The COMMAND may contain `%m' and `%t' markers which are replaced by a\n\ |
1177 | prompt message and the passphrase tag respectively. The TIMEOUT is an\n\ |
1178 | integer, optionally followed by `d', `h', `m' or `s' to specify units of\n\ |
1179 | days, hours, minutes or seconds respectively.\n\ |
1180 | \n\ |
1181 | In client mode, if a command is specified on the command line, it is sent\n\ |
1182 | to the running server; otherwise the program reads requests from stdin.\n\ |
1183 | Responses from the pixie are written to stdout. Send a HELP request for\n\ |
1184 | a quick summary of the pixie communication protocol.\n\ |
1185 | "); |
1186 | } |
1187 | |
1188 | /* --- @main@ --- * |
1189 | * |
1190 | * Arguments: @int argc@ = number of arguments |
1191 | * @char *argv[]@ = vector of argument values |
1192 | * |
1193 | * Returns: Zero if OK. |
1194 | * |
1195 | * Use: Main program. Listens on a socket and responds with a PGP |
1196 | * passphrase when asked. |
1197 | */ |
1198 | |
1199 | int main(int argc, char *argv[]) |
1200 | { |
1201 | char *path = 0; |
1202 | struct sockaddr_un *sun; |
1203 | size_t sz; |
1204 | unsigned f = 0; |
1205 | |
16efd15b |
1206 | #define f_bogus 1u |
1207 | #define f_client 2u |
1208 | #define f_stdin 4u |
1209 | #define f_daemon 8u |
1210 | #define f_syslog 16u |
025c5f4a |
1211 | #define f_fetch 32u |
1212 | #define f_verify 64u |
069c185c |
1213 | |
1214 | /* --- Initialize libraries --- */ |
1215 | |
1216 | ego(argv[0]); |
1217 | sub_init(); |
1218 | |
1219 | /* --- Set up the locked memory area --- */ |
1220 | |
6a2d21e4 |
1221 | l_init(&lm, 16384); |
069c185c |
1222 | setuid(getuid()); |
1223 | |
1224 | /* --- Parse command line arguments --- */ |
1225 | |
1226 | for (;;) { |
1227 | static struct option opts[] = { |
1228 | |
1229 | /* --- Standard GNUy help options --- */ |
1230 | |
1231 | { "help", 0, 0, 'h' }, |
1232 | { "version", 0, 0, 'V' }, |
1233 | { "usage", 0, 0, 'u' }, |
1234 | |
1235 | /* --- Other options --- */ |
1236 | |
1237 | { "quiet", 0, 0, 'q' }, |
1238 | { "verbose", 0, 0, 'v' }, |
1239 | { "client", 0, 0, 'C' }, |
025c5f4a |
1240 | { "passphrase", 0, 0, 'P' }, |
1241 | { "verify-passphrase", 0, 0, '+' }, |
069c185c |
1242 | { "socket", OPTF_ARGREQ, 0, 's' }, |
1243 | { "command", OPTF_ARGREQ, 0, 'c' }, |
6a2d21e4 |
1244 | { "fetch", 0, 0, 'f' }, |
069c185c |
1245 | { "timeout", OPTF_ARGREQ, 0, 't' }, |
1246 | { "interactive", 0, 0, 'i' }, |
1247 | { "stdin", 0, 0, 'i' }, |
1248 | { "daemon", 0, 0, 'd' }, |
1249 | { "log", 0, 0, 'l' }, |
1250 | { "syslog", 0, 0, 'l' }, |
1251 | |
1252 | /* --- Magic terminator --- */ |
1253 | |
45c0fd36 |
1254 | { 0, 0, 0, 0 } |
069c185c |
1255 | }; |
1256 | |
025c5f4a |
1257 | int i = mdwopt(argc, argv, "hVuqvCPs:c:ft:idl", opts, 0, 0, 0); |
069c185c |
1258 | if (i < 0) |
1259 | break; |
1260 | |
1261 | switch (i) { |
1262 | |
1263 | /* --- GNUy help options --- */ |
1264 | |
1265 | case 'h': |
1266 | help(stdout); |
1267 | exit(0); |
1268 | case 'V': |
1269 | version(stdout); |
1270 | exit(0); |
1271 | case 'u': |
1272 | usage(stdout); |
1273 | exit(0); |
1274 | |
1275 | /* --- Other interesting things --- */ |
1276 | |
1277 | case 'q': |
1278 | if (verbose) |
1279 | verbose--; |
1280 | break; |
1281 | case 'v': |
1282 | verbose++; |
1283 | break; |
1284 | case 'C': |
1285 | f |= f_client; |
025c5f4a |
1286 | f &= ~f_fetch; |
1287 | break; |
1288 | case 'P': |
1289 | if (!(f & f_fetch)) |
1290 | f |= f_fetch; |
1291 | else |
1292 | f |= f_verify; |
1293 | break; |
1294 | case '+': |
1295 | f |= f_fetch | f_verify; |
1296 | f &= ~f_client; |
069c185c |
1297 | break; |
1298 | case 's': |
1299 | path = optarg; |
1300 | break; |
1301 | case 't': |
1302 | if ((timeout = pixserv_timeout(optarg)) == 0) |
1303 | die(1, "bad timeout `%s'", optarg); |
1304 | break; |
1305 | case 'c': |
1306 | command = optarg; |
6a2d21e4 |
1307 | flags |= F_FETCH; |
1308 | break; |
1309 | case 'f': |
1310 | flags |= F_FETCH; |
069c185c |
1311 | break; |
1312 | case 'i': |
1313 | f |= f_stdin; |
1314 | break; |
1315 | case 'd': |
1316 | f |= f_daemon; |
1317 | break; |
1318 | case 'l': |
1319 | f |= f_syslog; |
1320 | break; |
1321 | |
1322 | /* --- Something else --- */ |
1323 | |
1324 | default: |
1325 | f |= f_bogus; |
1326 | break; |
1327 | } |
1328 | } |
1329 | |
025c5f4a |
1330 | if (f & f_bogus || |
1331 | (optind < argc && !(f & (f_client|f_fetch))) || |
1332 | ((f & f_fetch) && optind != argc - 1)) { |
069c185c |
1333 | usage(stderr); |
1334 | exit(1); |
1335 | } |
1336 | |
025c5f4a |
1337 | /* --- Handle request for a passphrase --- */ |
1338 | |
1339 | if (f & f_fetch) { |
1340 | char *buf = l_alloc(&lm, 1024); |
1341 | passphrase_connect(path); |
1342 | if (passphrase_read(argv[optind], |
1343 | (f & f_verify) ? PMODE_VERIFY : PMODE_READ, |
1344 | buf, 1024)) |
1345 | die(1, "failed to read passphrase: %s", strerror(errno)); |
1346 | puts(buf); |
1347 | return (0); |
1348 | } |
1349 | |
069c185c |
1350 | /* --- Set up the socket address --- */ |
1351 | |
1352 | sun = pixie_address(path, &sz); |
1353 | |
1354 | /* --- Initialize selectory --- */ |
1355 | |
1356 | sel_init(&sel); |
1357 | signal(SIGPIPE, SIG_IGN); |
1358 | |
1359 | /* --- Be a client if a client's wanted --- */ |
1360 | |
1361 | if (f & f_client) |
1362 | pix_client(sun, sz, argv + optind); |
1363 | |
1364 | /* --- Open the syslog if requested --- */ |
1365 | |
1366 | if (f & f_syslog) { |
1367 | flags |= F_SYSLOG; |
1368 | openlog(QUIS, 0, LOG_DAEMON); |
1369 | } |
1370 | |
1371 | /* --- Check on the locked memory area --- */ |
1372 | |
1373 | { |
1374 | dstr d = DSTR_INIT; |
1375 | int rc = l_report(&lm, &d); |
1376 | if (rc < 0) |
1377 | die(EXIT_FAILURE, d.buf); |
1378 | else if (rc && verbose) { |
1379 | log(d.buf); |
1380 | log("couldn't lock passphrase buffer"); |
1381 | } |
1382 | dstr_destroy(&d); |
6a2d21e4 |
1383 | arena_setsecure(&lm.a); |
069c185c |
1384 | } |
1385 | |
1386 | /* --- Set signal behaviours --- */ |
1387 | |
1388 | { |
1389 | static sig sigint, sigterm, sigquit, sighup; |
2c41d513 |
1390 | struct sigaction sa; |
069c185c |
1391 | sig_init(&sel); |
2c41d513 |
1392 | sigaction(SIGINT, 0, &sa); |
1393 | if (sa.sa_handler != SIG_IGN) |
1394 | sig_add(&sigint, SIGINT, pix_sigdie, 0); |
069c185c |
1395 | sig_add(&sigterm, SIGTERM, pix_sigdie, 0); |
1396 | sig_add(&sigquit, SIGQUIT, pix_sigflush, 0); |
1397 | sig_add(&sighup, SIGHUP, pix_sigflush, 0); |
1398 | } |
1399 | |
1400 | /* --- Set up the server --- */ |
1401 | |
1402 | pix_setup(sun, sz); |
6a2d21e4 |
1403 | if (f & f_stdin) { |
1404 | pixserv *px = pixserv_create(STDIN_FILENO, STDOUT_FILENO); |
1405 | sel_rmtimer(&px->timer); |
1406 | px->f |= px_stdin; |
1407 | } |
069c185c |
1408 | |
1409 | /* --- Fork into the background if requested --- */ |
1410 | |
45c0fd36 |
1411 | if (f & f_daemon) { |
069c185c |
1412 | pid_t kid; |
1413 | |
1414 | if (((f & f_stdin) && |
1415 | (isatty(STDIN_FILENO) || isatty(STDOUT_FILENO))) || |
6a2d21e4 |
1416 | (!command && (flags & F_FETCH))) |
069c185c |
1417 | die(1, "can't become a daemon if terminal required"); |
1418 | |
1419 | if ((kid = fork()) < 0) |
1420 | die(1, "fork failed: %s", strerror(errno)); |
1421 | if (kid) |
1422 | _exit(0); |
1423 | #ifdef TIOCNOTTY |
1424 | { |
1425 | int fd; |
1426 | if ((fd = open("/dev/tty", O_RDONLY)) >= 0) { |
1427 | ioctl(fd, TIOCNOTTY); |
1428 | close(fd); |
1429 | } |
1430 | } |
1431 | #endif |
4cb04adb |
1432 | chdir("/"); |
069c185c |
1433 | setsid(); |
1434 | |
3884054b |
1435 | if (fork() != 0) |
069c185c |
1436 | _exit(0); |
1437 | } |
1438 | |
2b2d07ca |
1439 | if (verbose) |
1440 | log("initialized ok"); |
2c41d513 |
1441 | |
1442 | { |
1443 | int selerr = 0; |
1444 | for (;;) { |
1445 | if (!sel_select(&sel)) |
1446 | selerr = 0; |
1447 | else if (errno != EINTR && errno != EAGAIN) { |
1448 | log("error from select: %s", strerror(errno)); |
1449 | selerr++; |
1450 | if (selerr > 8) { |
1451 | log("too many consecutive select errors: bailing out"); |
1452 | exit(EXIT_FAILURE); |
1453 | } |
1454 | } |
1455 | } |
1456 | } |
069c185c |
1457 | return (0); |
1458 | } |
1459 | |
1460 | /*----- That's all, folks -------------------------------------------------*/ |