3 * $Id: pixie.c,v 1.5 2000/07/29 22:05:22 mdw Exp $
5 * Passphrase pixie for Catacomb
7 * (c) 1999 Straylight/Edgeware
10 /*----- Licensing notice --------------------------------------------------*
12 * This file is part of Catacomb.
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.
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.
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,
30 /*----- Revision history --------------------------------------------------*
33 * Revision 1.5 2000/07/29 22:05:22 mdw
34 * Miscellaneous tidyings:
36 * * Change the timeout to something more appropriate for real use.
38 * * Check assumptions about object types when binding the socket. In
39 * particular, don't zap the socket if it's really something else.
41 * * In @p_request@, return a failure if the shell command returned
42 * nonzero. Fix a bug in @p_get@ which incorrectly passes on a success
43 * code when this happens.
45 * * Dispose of the locked memory in client mode to avoid being
48 * * Also in client mode, don't report closure from the server if we're
49 * running noninteractively.
51 * * Insert a missing option letter into the usage string.
53 * * Change to the root directory after forking in daemon mode.
55 * Revision 1.4 2000/06/17 11:50:53 mdw
56 * New pixie protocol allowing application to request passphrases and send
57 * them to the pixie. Use the secure arena interface for the input
58 * buffer. Extend the input buffer. Other minor fixes.
60 * Revision 1.3 1999/12/22 22:14:40 mdw
61 * Only produce initialization message if verbose.
63 * Revision 1.2 1999/12/22 22:13:42 mdw
64 * Fix bug in passphrase flushing loop.
66 * Revision 1.1 1999/12/22 15:58:41 mdw
67 * Passphrase pixie support.
71 /*----- Header files ------------------------------------------------------*/
86 #include <sys/types.h>
93 #include <sys/ioctl.h>
97 #include <sys/socket.h>
100 #include <mLib/alloc.h>
101 #include <mLib/dstr.h>
102 #include <mLib/fdflags.h>
103 #include <mLib/mdwopt.h>
104 #include <mLib/quis.h>
105 #include <mLib/report.h>
106 #include <mLib/sel.h>
107 #include <mLib/selbuf.h>
108 #include <mLib/sig.h>
109 #include <mLib/str.h>
110 #include <mLib/sub.h>
115 #include "passphrase.h"
118 /*----- Static variables --------------------------------------------------*/
120 static unsigned long timeout
= 900;
121 static sel_state sel
;
122 static unsigned verbose
= 1;
123 static const char *command
= 0;
125 static unsigned flags
= 0;
132 /*----- Event logging -----------------------------------------------------*/
136 * Arguments: @const char *p@ = @printf@-style format string
137 * @...@ = extra arguments to fill in
141 * Use: Writes out a timestamped log message.
144 static void log(const char *p
, ...)
149 if (!(flags
& F_SYSLOG
)) {
151 struct tm
*tm
= localtime(&t
);
153 d
.len
+= strftime(d
.buf
, d
.sz
, "%Y-%m-%d %H:%M:%S ", tm
);
156 dstr_vputf(&d
, p
, ap
);
159 if (flags
& F_SYSLOG
)
160 syslog(LOG_NOTICE
, "%s", d
.buf
);
163 dstr_write(&d
, stderr
);
168 /*----- Passphrase management ---------------------------------------------*/
170 /* --- Data structures --- */
172 typedef struct phrase
{
182 /* --- Variables --- */
184 #define P_ROOT ((phrase *)&p_root)
185 static struct { phrase
*next
; phrase
*prev
; } p_root
= { P_ROOT
, P_ROOT
};
187 /* --- @p_free@ --- *
189 * Arguments: @phrase *p@ = pointer to phrase block
193 * Use: Frees a phrase block.
196 static void p_free(phrase
*p
)
199 sel_rmtimer(&p
->timer
);
202 p
->next
->prev
= p
->prev
;
203 p
->prev
->next
= p
->next
;
207 /* --- @p_timer@ --- *
209 * Arguments: @struct timeval *tv@ = current time
210 * @void *p@ = pointer to phrase
214 * Use: Expires a passphrase.
217 static void p_timer(struct timeval
*tv
, void *p
)
221 log("expiring passphrase `%s'", pp
->tag
);
225 /* --- @p_alloc@ --- *
227 * Arguments: @size_t sz@ = amount of memory required
229 * Returns: Pointer to allocated memory, or null.
231 * Use: Allocates some locked memory, flushing old passphrases if
232 * there's not enough space.
235 static void *p_alloc(size_t sz
)
239 if ((p
= l_alloc(&lm
, sz
)) != 0)
241 if (P_ROOT
->next
== P_ROOT
)
244 log("flushing passphrase `%s' to free up needed space",
247 p_free(P_ROOT
->next
);
251 /* --- @p_find@ --- *
253 * Arguments: @const char *tag@ = pointer to tag to find
255 * Returns: Pointer to passphrase block, or null.
257 * Use: Finds a passphrase with a given tag.
260 static phrase
*p_find(const char *tag
)
264 for (p
= P_ROOT
->next
; p
!= P_ROOT
; p
= p
->next
) {
265 if (strcmp(p
->tag
, tag
) == 0) {
268 sel_rmtimer(&p
->timer
);
269 gettimeofday(&tv
, 0);
271 sel_addtimer(&sel
, &p
->timer
, &tv
, p_timer
, p
);
273 p
->next
->prev
= p
->prev
;
274 p
->prev
->next
= p
->next
;
276 p
->prev
= P_ROOT
->prev
;
277 P_ROOT
->prev
->next
= p
;
287 * Arguments: @const char *tag@ = pointer to tag string
288 * @const char *p@ = pointer to passphrase
289 * @unsigned long t@ = expiry timeout
291 * Returns: Pointer to newly-added passphrase.
293 * Use: Adds a new passphrase. The tag must not already exist.
296 static phrase
*p_add(const char *tag
, const char *p
, unsigned long t
)
298 size_t sz
= strlen(p
) + 1;
299 char *l
= p_alloc(sz
);
302 /* --- Make sure the locked memory was allocated --- */
307 /* --- Fill in some other bits of the block --- */
312 pp
->tag
= xstrdup(tag
);
315 /* --- Set the timer --- */
320 gettimeofday(&tv
, 0);
322 sel_addtimer(&sel
, &pp
->timer
, &tv
, p_timer
, pp
);
325 /* --- Link the block into the chain --- */
328 pp
->prev
= P_ROOT
->prev
;
329 P_ROOT
->prev
->next
= pp
;
334 /* --- @p_flush@ --- *
336 * Arguments: @const char *tag@ = pointer to tag string, or zero for all
340 * Use: Immediately flushes either a single phrase or all of them.
343 static void p_flush(const char *tag
)
347 if (!tag
&& verbose
> 1)
348 log("flushing all passphrases");
350 while (p
!= P_ROOT
) {
351 phrase
*pp
= p
->next
;
354 else if (strcmp(p
->tag
, tag
) == 0) {
356 log("flushing passphrase `%s'", tag
);
364 /*----- Reading passphrases -----------------------------------------------*/
366 /* --- @p_request@ --- *
368 * Arguments: @const char *msg@ = message string
369 * @const char *tag@ = pointer to tag string
370 * @char *buf@ = pointer to (locked) buffer
371 * @size_t sz@ = size of buffer
373 * Returns: Zero if all went well, nonzero otherwise.
375 * Use: Requests a passphrase from the user.
378 static int p_request(const char *msg
, const char *tag
, char *buf
, size_t sz
)
380 /* --- If there's a passphrase-fetching command, run it --- */
390 /* --- Substitute the prompt string into the command --- */
394 const char *q
= strchr(p
, '%');
417 /* --- Create a pipe and start a child process --- */
421 if ((kid
= fork()) < 0)
424 /* --- Child process --- */
428 if (dup2(fd
[1], STDOUT_FILENO
) < 0)
431 execl("/bin/sh", "sh", "-c", d
.buf
, (void *)0);
435 /* --- Read the data back into my buffer --- */
438 if ((r
= read(fd
[0], buf
, sz
- 1)) >= 0) {
439 char *q
= memchr(buf
, '\n', r
);
445 waitpid(kid
, &rc
, 0);
447 if (r
< 0 || rc
!= 0)
451 /* --- Tidy up when things go wrong --- */
462 /* --- Read a passphrase from the terminal --- *
464 * Use the standard Catacomb passphrase-reading function, so it'll read the
465 * passphrase from a file descriptor or something if the appropriate
466 * environment variable is set.
472 dstr_putf(&d
, "%s %s: ", msg
, tag
);
473 rc
= pixie_getpass(d
.buf
, buf
, sz
);
480 /* --- Sort out the buffer --- *
482 * Strip leading spaces.
488 while (isspace((unsigned char)*p
))
491 memmove(buf
, p
, len
);
502 * Arguments: @const char **q@ = where to store the result
503 * @const char *tag@ = pointer to tag string
504 * @unsigned mode@ = reading mode (verify?)
505 * @time_t exp@ = expiry time suggestion
507 * Returns: Zero if successful, @-1@ on a read failure, or @+1@ if the
508 * passphrase is missing and there is no fetcher. (This will
509 * always happen if there is no fetcher and @mode@ is
512 * Use: Reads a passphrase from somewhere.
515 static int p_get(const char **q
, const char *tag
, unsigned mode
, time_t exp
)
522 /* --- Write a log message --- */
525 log("passphrase `%s' requested", tag
);
527 /* --- If there is no fetcher, life is simpler --- */
529 if (!(flags
& F_FETCH
)) {
530 if (mode
== PMODE_VERIFY
)
532 if ((p
= p_find(tag
)) == 0)
538 /* --- Try to find the phrase --- */
540 if (mode
== PMODE_VERIFY
)
542 if (mode
== PMODE_VERIFY
|| (p
= p_find(tag
)) == 0) {
543 if ((pp
= p_alloc(LBUFSZ
)) == 0)
545 if (p_request(mode
== PMODE_READ ?
"Passphrase" : "New passphrase",
546 tag
, pp
, LBUFSZ
) < 0)
548 p
= p_add(tag
, pp
, exp
);
553 /* --- If verification is requested, verify the passphrase --- */
555 if (mode
== PMODE_VERIFY
) {
556 if (!pp
&& (pp
= p_alloc(LBUFSZ
)) == 0)
558 if (p_request("Verify passphrase", tag
, pp
, LBUFSZ
) < 0)
560 if (strcmp(pp
, p
->p
) != 0) {
562 log("passphrases for `%s' don't match", tag
);
568 /* --- Tidy up and return the passphrase --- */
571 memset(pp
, 0, LBUFSZ
);
577 /* --- Tidy up if things went wrong --- */
581 memset(pp
, 0, LBUFSZ
);
589 /*----- Server command parsing --------------------------------------------*/
591 /* --- Data structures --- */
593 typedef struct pixserv
{
600 enum { px_stdin
= 1 };
602 #define PIXSERV_TIMEOUT 30
604 /* --- @pixserv_expire@ --- *
606 * Arguments: @struct timeval *tv@ = pointer to current time
607 * @void *p@ = pointer to server block
611 * Use: Expires a pixie connection if the remote end decides he's not
612 * interested any more.
615 static void pixserv_expire(struct timeval
*tv
, void *p
)
618 if (px
->fd
!= px
->b
.reader
.fd
)
620 selbuf_destroy(&px
->b
);
621 close(px
->b
.reader
.fd
);
625 /* --- @pixserv_write@ --- *
627 * Arguments: @pixserv *px@ = pointer to server block
628 * @const char *p@ = pointer to skeleton string
629 * @...@ = other arguments to fill in
633 * Use: Formats a string and emits it to the output file.
636 static void pixserv_write(pixserv
*px
, const char *p
, ...)
642 dstr_vputf(&d
, p
, ap
);
643 write(px
->fd
, d
.buf
, d
.len
);
648 /* --- @pixserv_timeout@ --- *
650 * Arguments: @const char *p@ = pointer to timeout string
652 * Returns: Timeout in seconds.
654 * Use: Translates a string to a timeout value in seconds.
657 static unsigned long pixserv_timeout(const char *p
)
665 t
= strtoul(p
, &q
, 0);
670 case 's': if (q
[1] != 0)
677 /* --- @pixserv_line@ --- *
679 * Arguments: @char *s@ = pointer to the line read
680 * @void *p@ = pointer to server block
684 * Use: Handles a line read from the client.
687 static void pixserv_line(char *s
, void *p
)
693 /* --- Handle an end-of-file --- */
695 if (!(px
->f
& px_stdin
))
696 sel_rmtimer(&px
->timer
);
698 if (px
->fd
!= px
->b
.reader
.fd
)
700 selbuf_destroy(&px
->b
);
701 close(px
->b
.reader
.fd
);
705 /* --- Fiddle the timeout --- */
707 if (!(px
->f
& px_stdin
)) {
709 gettimeofday(&tv
, 0);
710 tv
.tv_sec
+= PIXSERV_TIMEOUT
;
711 sel_addtimer(&sel
, &px
->timer
, &tv
, pixserv_expire
, px
);
714 /* --- Scan out the first word --- */
716 if ((q
= str_getword(&s
)) == 0)
718 for (qq
= q
; *qq
; qq
++)
719 *qq
= tolower((unsigned char)*qq
);
721 /* --- Handle a help request --- */
723 if (strcmp(q
, "help") == 0) {
725 INFO Commands supported:\n\
728 INFO PASS tag [expire]\n\
729 INFO VERIFY tag [expire]\n\
731 INFO SET tag [expire] -- phrase\n\
737 /* --- List the passphrases --- */
739 else if (strcmp(q
, "list") == 0) {
742 for (p
= P_ROOT
->next
; p
!= P_ROOT
; p
= p
->next
) {
744 pixserv_write(px
, "ITEM %s no-expire\n", p
->tag
);
747 gettimeofday(&tv
, 0);
748 TV_SUB(&tv
, &p
->timer
.tv
, &tv
);
749 pixserv_write(px
, "ITEM %s %i\n", p
->tag
, tv
.tv_sec
);
752 pixserv_write(px
, "OK\n");
755 /* --- Request a passphrase --- */
757 else if ((mode
= PMODE_READ
, strcmp(q
, "pass") == 0) ||
758 (mode
= PMODE_VERIFY
, strcmp(q
, "verify") == 0)) {
763 if ((q
= str_getword(&s
)) == 0)
764 pixserv_write(px
, "FAIL missing tag\n");
765 else if ((t
= pixserv_timeout(s
)) == 0)
766 pixserv_write(px
, "FAIL bad timeout\n");
768 rc
= p_get(&p
, q
, mode
, t
> timeout ? timeout
: t
);
771 pixserv_write(px
, "OK %s\n", p
);
774 pixserv_write(px
, "FAIL error reading passphrase\n");
777 pixserv_write(px
, "MISSING\n");
783 /* --- Flush existing passphrases --- */
785 else if (strcmp(q
, "flush") == 0) {
788 pixserv_write(px
, "OK\n");
791 /* --- Set a passphrase --- */
793 else if (strcmp(q
, "set") == 0) {
796 if ((tag
= str_getword(&s
)) == 0)
797 pixserv_write(px
, "FAIL missing tag\n");
798 else if ((q
= str_getword(&s
)) == 0)
799 pixserv_write(px
, "FAIL no passphrase\n");
801 if (strcmp(q
, "--") != 0) {
802 t
= pixserv_timeout(q
);
805 t
= pixserv_timeout(0);
807 pixserv_write(px
, "FAIL no passphrase\n");
808 else if (strcmp(q
, "--") != 0)
809 pixserv_write(px
, "FAIL rubbish found before passphrase\n");
813 pixserv_write(px
, "OK\n");
818 /* --- Shut the server down --- */
820 else if (strcmp(q
, "quit") == 0) {
822 log("%s client requested shutdown",
823 px
->f
& px_stdin ?
"local" : "remote");
824 pixserv_write(px
, "OK\n");
828 /* --- Report an error for other commands --- */
831 pixserv_write(px
, "FAIL unknown command `%s'\n", q
);
834 /* --- @pixserv_create@ --- *
836 * Arguments: @int fd@ = file descriptor to read from
837 * @int ofd@ = file descriptor to write to
839 * Returns: Pointer to the new connection.
841 * Use: Creates a new Pixie server instance for a new connection.
844 static pixserv
*pixserv_create(int fd
, int ofd
)
846 pixserv
*px
= CREATE(pixserv
);
848 fdflags(fd
, O_NONBLOCK
, O_NONBLOCK
, FD_CLOEXEC
, FD_CLOEXEC
);
850 fdflags(ofd
, O_NONBLOCK
, O_NONBLOCK
, FD_CLOEXEC
, FD_CLOEXEC
);
852 selbuf_init(&px
->b
, &sel
, fd
, pixserv_line
, px
);
853 px
->b
.b
.a
= arena_secure
;
854 selbuf_setsize(&px
->b
, 1024);
855 gettimeofday(&tv
, 0);
856 tv
.tv_sec
+= PIXSERV_TIMEOUT
;
857 sel_addtimer(&sel
, &px
->timer
, &tv
, pixserv_expire
, px
);
862 /* --- @pixserv_accept@ --- *
864 * Arguments: @int fd@ = file descriptor
865 * @unsigned mode@ = what's happened
866 * @void *p@ = an uninteresting argument
870 * Use: Accepts a new connection.
873 static void pixserv_accept(int fd
, unsigned mode
, void *p
)
876 struct sockaddr_un sun
;
877 int sunsz
= sizeof(sun
);
879 if (mode
!= SEL_READ
)
881 if ((nfd
= accept(fd
, (struct sockaddr
*)&sun
, &sunsz
)) < 0) {
883 log("new connection failed: %s", strerror(errno
));
886 pixserv_create(nfd
, nfd
);
889 /*----- Setting up the server ---------------------------------------------*/
891 /* --- @unlinksocket@ --- *
897 * Use: Tidies up the socket when it's finished with.
900 static char *sockpath
;
902 static void unlinksocket(void)
908 /* --- @pix_sigdie@ --- *
910 * Arguments: @int sig@ = signal number
911 * @void *p@ = uninteresting argument
915 * Use: Shuts down the program after a fatal signal.
918 static void pix_sigdie(int sig
, void *p
)
925 case SIGTERM
: p
= "SIGTERM"; break;
926 case SIGINT
: p
= "SIGINT"; break;
928 sprintf(buf
, "signal %i", sig
);
932 log("shutting down on %s", p
);
937 /* --- @pix_sigflush@ --- *
939 * Arguments: @int sig@ = signal number
940 * @void *p@ = uninteresting argument
944 * Use: Flushes the passphrase cache on receipt of a signal.
947 static void pix_sigflush(int sig
, void *p
)
954 case SIGHUP
: p
= "SIGHUP"; break;
955 case SIGQUIT
: p
= "SIGQUIT"; break;
957 sprintf(buf
, "signal %i", sig
);
961 log("received %s; flushing passphrases", p
);
966 /* --- @pix_setup@ --- *
968 * Arguments: @struct sockaddr_un *sun@ = pointer to address to use
969 * @size_t sz@ = size of socket address
973 * Use: Sets up the pixie's Unix-domain socket.
976 static void pix_setup(struct sockaddr_un
*sun
, size_t sz
)
980 /* --- Set up the parent directory --- */
983 char *p
= sun
->sun_path
;
984 char *q
= strrchr(p
, '/');
994 if (stat(d
.buf
, &st
))
995 die(1, "couldn't stat `%s': %s", d
.buf
, strerror(errno
));
996 if (!S_ISDIR(st
.st_mode
))
997 die(1, "object `%s' isn't a directory", d
.buf
);
998 if (st
.st_mode
& 0077)
999 die(1, "parent directory `%s' has group or world access", d
.buf
);
1004 /* --- Initialize the socket --- */
1012 if ((fd
= socket(PF_UNIX
, SOCK_STREAM
, 0)) < 0)
1013 die(1, "couldn't create socket: %s", strerror(errno
));
1014 if (bind(fd
, (struct sockaddr
*)sun
, sz
) < 0) {
1016 if (errno
!= EADDRINUSE
)
1017 die(1, "couldn't bind to address: %s", strerror(e
));
1019 die(1, "too many retries; giving up");
1021 if (connect(fd
, (struct sockaddr
*)sun
, sz
)) {
1023 if (errno
!= ECONNREFUSED
)
1024 die(1, "couldn't bind to address: %s", strerror(e
));
1025 if (stat(sun
->sun_path
, &st
))
1026 die(1, "couldn't stat `%s': %s", sun
->sun_path
, strerror(errno
));
1027 if (!S_ISSOCK(st
.st_mode
))
1028 die(1, "object `%s' isn't a socket", sun
->sun_path
);
1030 log("stale socket found; removing it");
1031 unlink(sun
->sun_path
);
1035 log("server already running; shutting it down");
1036 write(fd
, "QUIT\n", 5);
1042 chmod(sun
->sun_path
, 0600);
1043 fdflags(fd
, O_NONBLOCK
, O_NONBLOCK
, FD_CLOEXEC
, FD_CLOEXEC
);
1045 die(1, "couldn't listen on socket: %s", strerror(errno
));
1048 /* --- Set up the rest of the server --- */
1051 static sel_file serv
;
1052 sockpath
= sun
->sun_path
;
1053 atexit(unlinksocket
);
1054 sel_initfile(&sel
, &serv
, fd
, SEL_READ
, pixserv_accept
, 0);
1059 /*----- Client support code -----------------------------------------------*/
1061 /* --- Variables --- */
1063 static selbuf c_server
, c_client
;
1065 enum { cf_uclose
= 1, cf_sclose
= 2 };
1067 /* --- Line handler functions --- */
1069 static void c_uline(char *s
, void *p
)
1073 selbuf_destroy(&c_client
);
1074 shutdown(c_server
.reader
.fd
, 1);
1075 c_flags
|= cf_uclose
;
1079 write(c_server
.reader
.fd
, s
, sz
);
1083 static void c_sline(char *s
, void *p
)
1086 selbuf_destroy(&c_server
);
1087 if (!(c_flags
& cf_uclose
)) {
1088 moan("server closed the connection");
1089 selbuf_destroy(&c_client
);
1096 /* --- @pix_client@ --- *
1098 * Arguments: @struct sockaddr_un *sun@ = pointer to socket address
1099 * @size_t sz@ = size of socket address
1100 * @char *argv[]@ = pointer to arguments to send
1104 * Use: Performs client-side actions for the passphrase pixie.
1107 static void pix_client(struct sockaddr_un
*sun
, size_t sz
, char *argv
[])
1111 /* --- Dispose of locked memory --- */
1115 /* --- Open the socket --- */
1117 if ((fd
= socket(PF_UNIX
, SOCK_STREAM
, 0)) < 0)
1118 die(1, "couldn't create socket: %s", strerror(errno
));
1119 if (connect(fd
, (struct sockaddr
*)sun
, sz
))
1120 die(1, "couldn't connect to server: %s", strerror(errno
));
1121 selbuf_init(&c_server
, &sel
, fd
, c_sline
, 0);
1123 /* --- If there are any arguments, turn them into a string --- */
1126 selbuf_init(&c_client
, &sel
, STDIN_FILENO
, c_uline
, 0);
1135 write(fd
, d
.buf
, d
.len
);
1137 c_flags
|= cf_uclose
;
1141 /* --- And repeat --- */
1147 /*----- Main code ---------------------------------------------------------*/
1149 /* --- @help@, @version@, @usage@ --- *
1151 * Arguments: @FILE *fp@ = stream to write on
1155 * Use: Emit helpful messages.
1158 static void usage(FILE *fp
)
1162 $ [-qvfidl] [-c command] [-t timeout] [-s socket]\n\
1163 $ [-s socket] -C [command args...]\n\
1167 static void version(FILE *fp
)
1169 pquis(fp
, "$, Catacomb version " VERSION
"\n");
1172 static void help(FILE *fp
)
1178 The Catacomb passphrase pixie collects and caches passphrases used to\n\
1179 protect important keys. Options provided:\n\
1181 -h, --help Show this help text.\n\
1182 -V, --version Show the program's version number.\n\
1183 -u, --usage Show a (very) terse usage summary.\n\
1185 -C, --client Connect to a running pixie as a client.\n\
1187 -q, --quiet Emit fewer log messages.\n\
1188 -v, --version Emit more log messages.\n\
1189 -s, --socket=FILE Name the pixie's socket.\n\
1190 -c, --command=COMMAND Shell command to read a passphrase.\n\
1191 -f, --fetch Fetch passphrases from the terminal.\n\
1192 -t, --timeout=TIMEOUT Length of time to retain a passphrase in memory.\n\
1193 -i, --interactive Allow commands to be typed interactively.\n\
1194 -d, --daemon Fork into the background after initialization.\n\
1195 -l, --syslog Emit log messages to the system log.\n\
1197 The COMMAND may contain `%m' and `%t' markers which are replaced by a\n\
1198 prompt message and the passphrase tag respectively. The TIMEOUT is an\n\
1199 integer, optionally followed by `d', `h', `m' or `s' to specify units of\n\
1200 days, hours, minutes or seconds respectively.\n\
1202 In client mode, if a command is specified on the command line, it is sent\n\
1203 to the running server; otherwise the program reads requests from stdin.\n\
1204 Responses from the pixie are written to stdout. Send a HELP request for\n\
1205 a quick summary of the pixie communication protocol.\n\
1211 * Arguments: @int argc@ = number of arguments
1212 * @char *argv[]@ = vector of argument values
1214 * Returns: Zero if OK.
1216 * Use: Main program. Listens on a socket and responds with a PGP
1217 * passphrase when asked.
1220 int main(int argc
, char *argv
[])
1223 struct sockaddr_un
*sun
;
1235 /* --- Initialize libraries --- */
1240 /* --- Set up the locked memory area --- */
1245 /* --- Parse command line arguments --- */
1248 static struct option opts
[] = {
1250 /* --- Standard GNUy help options --- */
1252 { "help", 0, 0, 'h' },
1253 { "version", 0, 0, 'V' },
1254 { "usage", 0, 0, 'u' },
1256 /* --- Other options --- */
1258 { "quiet", 0, 0, 'q' },
1259 { "verbose", 0, 0, 'v' },
1260 { "client", 0, 0, 'C' },
1261 { "socket", OPTF_ARGREQ
, 0, 's' },
1262 { "command", OPTF_ARGREQ
, 0, 'c' },
1263 { "fetch", 0, 0, 'f' },
1264 { "timeout", OPTF_ARGREQ
, 0, 't' },
1265 { "interactive", 0, 0, 'i' },
1266 { "stdin", 0, 0, 'i' },
1267 { "daemon", 0, 0, 'd' },
1268 { "log", 0, 0, 'l' },
1269 { "syslog", 0, 0, 'l' },
1271 /* --- Magic terminator --- */
1276 int i
= mdwopt(argc
, argv
, "hVuqvCs:c:ft:idl", opts
, 0, 0, 0);
1282 /* --- GNUy help options --- */
1294 /* --- Other interesting things --- */
1310 if ((timeout
= pixserv_timeout(optarg
)) == 0)
1311 die(1, "bad timeout `%s'", optarg
);
1330 /* --- Something else --- */
1338 if (f
& f_bogus
|| (optind
< argc
&& !(f
& f_client
))) {
1343 /* --- Set up the socket address --- */
1345 sun
= pixie_address(path
, &sz
);
1347 /* --- Initialize selectory --- */
1350 signal(SIGPIPE
, SIG_IGN
);
1352 /* --- Be a client if a client's wanted --- */
1355 pix_client(sun
, sz
, argv
+ optind
);
1357 /* --- Open the syslog if requested --- */
1361 openlog(QUIS
, 0, LOG_DAEMON
);
1364 /* --- Check on the locked memory area --- */
1368 int rc
= l_report(&lm
, &d
);
1370 die(EXIT_FAILURE
, d
.buf
);
1371 else if (rc
&& verbose
) {
1373 log("couldn't lock passphrase buffer");
1376 arena_setsecure(&lm
.a
);
1379 /* --- Set signal behaviours --- */
1382 static sig sigint
, sigterm
, sigquit
, sighup
;
1384 sig_add(&sigint
, SIGINT
, pix_sigdie
, 0);
1385 sig_add(&sigterm
, SIGTERM
, pix_sigdie
, 0);
1386 sig_add(&sigquit
, SIGQUIT
, pix_sigflush
, 0);
1387 sig_add(&sighup
, SIGHUP
, pix_sigflush
, 0);
1390 /* --- Set up the server --- */
1394 pixserv
*px
= pixserv_create(STDIN_FILENO
, STDOUT_FILENO
);
1395 sel_rmtimer(&px
->timer
);
1399 /* --- Fork into the background if requested --- */
1404 if (((f
& f_stdin
) &&
1405 (isatty(STDIN_FILENO
) || isatty(STDOUT_FILENO
))) ||
1406 (!command
&& (flags
& F_FETCH
)))
1407 die(1, "can't become a daemon if terminal required");
1409 if ((kid
= fork()) < 0)
1410 die(1, "fork failed: %s", strerror(errno
));
1416 if ((fd
= open("/dev/tty", O_RDONLY
)) >= 0) {
1417 ioctl(fd
, TIOCNOTTY
);
1430 log("initialized ok");
1436 /*----- That's all, folks -------------------------------------------------*/