3 * Passphrase pixie for Catacomb
5 * (c) 1999 Straylight/Edgeware
8 /*----- Licensing notice --------------------------------------------------*
10 * This file is part of Catacomb.
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.
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.
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,
28 /*----- Header files ------------------------------------------------------*/
43 #include <sys/types.h>
50 #include <sys/ioctl.h>
54 #include <sys/socket.h>
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>
64 #include <mLib/selbuf.h>
72 #include "passphrase.h"
75 /*----- Static variables --------------------------------------------------*/
77 static unsigned long timeout
= 900;
79 static unsigned verbose
= 1;
80 static const char *command
= 0;
82 static unsigned flags
= 0;
87 /*----- Event logging -----------------------------------------------------*/
91 * Arguments: @const char *p@ = @printf@-style format string
92 * @...@ = extra arguments to fill in
96 * Use: Writes out a timestamped log message.
99 static void log(const char *p
, ...)
104 if (!(flags
& F_SYSLOG
)) {
106 struct tm
*tm
= localtime(&t
);
108 d
.len
+= strftime(d
.buf
, d
.sz
, "%Y-%m-%d %H:%M:%S ", tm
);
111 dstr_vputf(&d
, p
, &ap
);
114 if (flags
& F_SYSLOG
)
115 syslog(LOG_NOTICE
, "%s", d
.buf
);
118 dstr_write(&d
, stderr
);
123 /*----- Passphrase management ---------------------------------------------*/
125 /* --- Data structures --- */
127 typedef struct phrase
{
137 /* --- Variables --- */
139 #define P_ROOT ((phrase *)&p_root)
140 static struct { phrase
*next
; phrase
*prev
; } p_root
= { P_ROOT
, P_ROOT
};
142 /* --- @p_free@ --- *
144 * Arguments: @phrase *p@ = pointer to phrase block
148 * Use: Frees a phrase block.
151 static void p_free(phrase
*p
)
154 sel_rmtimer(&p
->timer
);
157 p
->next
->prev
= p
->prev
;
158 p
->prev
->next
= p
->next
;
162 /* --- @p_timer@ --- *
164 * Arguments: @struct timeval *tv@ = current time
165 * @void *p@ = pointer to phrase
169 * Use: Expires a passphrase.
172 static void p_timer(struct timeval
*tv
, void *p
)
176 log("expiring passphrase `%s'", pp
->tag
);
180 /* --- @p_alloc@ --- *
182 * Arguments: @size_t sz@ = amount of memory required
184 * Returns: Pointer to allocated memory, or null.
186 * Use: Allocates some locked memory, flushing old passphrases if
187 * there's not enough space.
190 static void *p_alloc(size_t sz
)
194 if ((p
= l_alloc(&lm
, sz
)) != 0)
196 if (P_ROOT
->next
== P_ROOT
)
199 log("flushing passphrase `%s' to free up needed space",
202 p_free(P_ROOT
->next
);
206 /* --- @p_find@ --- *
208 * Arguments: @const char *tag@ = pointer to tag to find
210 * Returns: Pointer to passphrase block, or null.
212 * Use: Finds a passphrase with a given tag.
215 static phrase
*p_find(const char *tag
)
219 for (p
= P_ROOT
->next
; p
!= P_ROOT
; p
= p
->next
) {
220 if (strcmp(p
->tag
, tag
) == 0) {
223 sel_rmtimer(&p
->timer
);
224 gettimeofday(&tv
, 0);
226 sel_addtimer(&sel
, &p
->timer
, &tv
, p_timer
, p
);
228 p
->next
->prev
= p
->prev
;
229 p
->prev
->next
= p
->next
;
231 p
->prev
= P_ROOT
->prev
;
232 P_ROOT
->prev
->next
= p
;
242 * Arguments: @const char *tag@ = pointer to tag string
243 * @const char *p@ = pointer to passphrase
244 * @unsigned long t@ = expiry timeout
246 * Returns: Pointer to newly-added passphrase.
248 * Use: Adds a new passphrase. The tag must not already exist.
251 static phrase
*p_add(const char *tag
, const char *p
, unsigned long t
)
253 size_t sz
= strlen(p
) + 1;
254 char *l
= p_alloc(sz
);
257 /* --- Make sure the locked memory was allocated --- */
262 /* --- Fill in some other bits of the block --- */
267 pp
->tag
= xstrdup(tag
);
270 /* --- Set the timer --- */
275 gettimeofday(&tv
, 0);
277 sel_addtimer(&sel
, &pp
->timer
, &tv
, p_timer
, pp
);
280 /* --- Link the block into the chain --- */
283 pp
->prev
= P_ROOT
->prev
;
284 P_ROOT
->prev
->next
= pp
;
289 /* --- @p_flush@ --- *
291 * Arguments: @const char *tag@ = pointer to tag string, or zero for all
295 * Use: Immediately flushes either a single phrase or all of them.
298 static void p_flush(const char *tag
)
302 if (!tag
&& verbose
> 1)
303 log("flushing all passphrases");
305 while (p
!= P_ROOT
) {
306 phrase
*pp
= p
->next
;
309 else if (strcmp(p
->tag
, tag
) == 0) {
311 log("flushing passphrase `%s'", tag
);
319 /*----- Reading passphrases -----------------------------------------------*/
321 /* --- @p_request@ --- *
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
328 * Returns: Zero if all went well, nonzero otherwise.
330 * Use: Requests a passphrase from the user.
333 static int p_request(const char *msg
, const char *tag
, char *buf
, size_t sz
)
335 /* --- If there's a passphrase-fetching command, run it --- */
345 /* --- Substitute the prompt string into the command --- */
349 const char *q
= strchr(p
, '%');
372 /* --- Create a pipe and start a child process --- */
376 if ((kid
= fork()) < 0)
379 /* --- Child process --- */
383 if (dup2(fd
[1], STDOUT_FILENO
) < 0)
386 execl("/bin/sh", "sh", "-c", d
.buf
, (char *)0);
390 /* --- Read the data back into my buffer --- */
393 if ((r
= read(fd
[0], buf
, sz
- 1)) >= 0) {
394 char *q
= memchr(buf
, '\n', r
);
400 waitpid(kid
, &rc
, 0);
402 if (r
< 0 || rc
!= 0)
406 /* --- Tidy up when things go wrong --- */
417 /* --- Read a passphrase from the terminal --- *
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.
427 dstr_putf(&d
, "%s %s: ", msg
, tag
);
428 rc
= pixie_getpass(d
.buf
, buf
, sz
);
435 /* --- Sort out the buffer --- *
437 * Strip leading spaces.
443 while (isspace((unsigned char)*p
))
446 memmove(buf
, p
, len
);
457 * Arguments: @const char **q@ = where to store the result
458 * @const char *tag@ = pointer to tag string
459 * @unsigned mode@ = reading mode (verify?)
460 * @time_t exp@ = expiry time suggestion
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
467 * Use: Reads a passphrase from somewhere.
470 static int p_get(const char **q
, const char *tag
, unsigned mode
, time_t exp
)
477 /* --- Write a log message --- */
480 log("passphrase `%s' requested", tag
);
482 /* --- If there is no fetcher, life is simpler --- */
484 if (!(flags
& F_FETCH
)) {
485 if (mode
== PMODE_VERIFY
)
487 if ((p
= p_find(tag
)) == 0)
493 /* --- Try to find the phrase --- */
495 if (mode
== PMODE_VERIFY
)
497 if (mode
== PMODE_VERIFY
|| (p
= p_find(tag
)) == 0) {
498 if ((pp
= p_alloc(LBUFSZ
)) == 0)
500 if (p_request(mode
== PMODE_READ ?
"Passphrase" : "New passphrase",
501 tag
, pp
, LBUFSZ
) < 0)
503 p
= p_add(tag
, pp
, exp
);
508 /* --- If verification is requested, verify the passphrase --- */
510 if (mode
== PMODE_VERIFY
) {
511 if (!pp
&& (pp
= p_alloc(LBUFSZ
)) == 0)
513 if (p_request("Verify passphrase", tag
, pp
, LBUFSZ
) < 0)
515 if (strcmp(pp
, p
->p
) != 0) {
517 log("passphrases for `%s' don't match", tag
);
523 /* --- Tidy up and return the passphrase --- */
526 memset(pp
, 0, LBUFSZ
);
532 /* --- Tidy up if things went wrong --- */
536 memset(pp
, 0, LBUFSZ
);
544 /*----- Server command parsing --------------------------------------------*/
546 /* --- Data structures --- */
548 typedef struct pixserv
{
557 #define PIXSERV_TIMEOUT 30
559 /* --- @pixserv_expire@ --- *
561 * Arguments: @struct timeval *tv@ = pointer to current time
562 * @void *p@ = pointer to server block
566 * Use: Expires a pixie connection if the remote end decides he's not
567 * interested any more.
570 static void pixserv_expire(struct timeval
*tv
, void *p
)
573 if (px
->fd
!= px
->b
.reader
.fd
)
575 selbuf_destroy(&px
->b
);
576 close(px
->b
.reader
.fd
);
580 /* --- @pixserv_write@ --- *
582 * Arguments: @pixserv *px@ = pointer to server block
583 * @const char *p@ = pointer to skeleton string
584 * @...@ = other arguments to fill in
588 * Use: Formats a string and emits it to the output file.
591 static void pixserv_write(pixserv
*px
, const char *p
, ...)
597 dstr_vputf(&d
, p
, &ap
);
598 write(px
->fd
, d
.buf
, d
.len
);
603 /* --- @pixserv_timeout@ --- *
605 * Arguments: @const char *p@ = pointer to timeout string
607 * Returns: Timeout in seconds.
609 * Use: Translates a string to a timeout value in seconds.
612 static unsigned long pixserv_timeout(const char *p
)
620 t
= strtoul(p
, &q
, 0);
625 case 's': if (q
[1] != 0)
632 /* --- @pixserv_line@ --- *
634 * Arguments: @char *s@ = pointer to the line read
635 * @size_t len@ = length of the line
636 * @void *p@ = pointer to server block
640 * Use: Handles a line read from the client.
643 static void pixserv_line(char *s
, size_t len
, void *p
)
649 /* --- Handle an end-of-file --- */
651 if (!(px
->f
& px_stdin
))
652 sel_rmtimer(&px
->timer
);
654 if (px
->fd
!= px
->b
.reader
.fd
)
656 selbuf_destroy(&px
->b
);
657 close(px
->b
.reader
.fd
);
661 /* --- Fiddle the timeout --- */
663 if (!(px
->f
& px_stdin
)) {
665 gettimeofday(&tv
, 0);
666 tv
.tv_sec
+= PIXSERV_TIMEOUT
;
667 sel_addtimer(&sel
, &px
->timer
, &tv
, pixserv_expire
, px
);
670 /* --- Scan out the first word --- */
672 if ((q
= str_getword(&s
)) == 0)
674 for (qq
= q
; *qq
; qq
++)
675 *qq
= tolower((unsigned char)*qq
);
677 /* --- Handle a help request --- */
679 if (strcmp(q
, "help") == 0) {
681 INFO Commands supported:\n\
684 INFO PASS tag [expire]\n\
685 INFO VERIFY tag [expire]\n\
687 INFO SET tag [expire] -- phrase\n\
693 /* --- List the passphrases --- */
695 else if (strcmp(q
, "list") == 0) {
698 for (p
= P_ROOT
->next
; p
!= P_ROOT
; p
= p
->next
) {
700 pixserv_write(px
, "ITEM %s no-expire\n", p
->tag
);
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
);
708 pixserv_write(px
, "OK\n");
711 /* --- Request a passphrase --- */
713 else if ((mode
= PMODE_READ
, strcmp(q
, "pass") == 0) ||
714 (mode
= PMODE_VERIFY
, strcmp(q
, "verify") == 0)) {
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");
724 rc
= p_get(&p
, q
, mode
, t
> timeout ? timeout
: t
);
727 pixserv_write(px
, "OK %s\n", p
);
730 pixserv_write(px
, "FAIL error reading passphrase\n");
733 pixserv_write(px
, "MISSING\n");
739 /* --- Flush existing passphrases --- */
741 else if (strcmp(q
, "flush") == 0) {
744 pixserv_write(px
, "OK\n");
747 /* --- Set a passphrase --- */
749 else if (strcmp(q
, "set") == 0) {
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");
757 if (strcmp(q
, "--") != 0) {
758 t
= pixserv_timeout(q
);
761 t
= pixserv_timeout(0);
763 pixserv_write(px
, "FAIL no passphrase\n");
764 else if (strcmp(q
, "--") != 0)
765 pixserv_write(px
, "FAIL rubbish found before passphrase\n");
769 pixserv_write(px
, "OK\n");
774 /* --- Shut the server down --- */
776 else if (strcmp(q
, "quit") == 0) {
778 log("%s client requested shutdown",
779 px
->f
& px_stdin ?
"local" : "remote");
780 pixserv_write(px
, "OK\n");
784 /* --- Report an error for other commands --- */
787 pixserv_write(px
, "FAIL unknown command `%s'\n", q
);
790 /* --- @pixserv_create@ --- *
792 * Arguments: @int fd@ = file descriptor to read from
793 * @int ofd@ = file descriptor to write to
795 * Returns: Pointer to the new connection.
797 * Use: Creates a new Pixie server instance for a new connection.
800 static pixserv
*pixserv_create(int fd
, int ofd
)
802 pixserv
*px
= CREATE(pixserv
);
804 fdflags(fd
, O_NONBLOCK
, O_NONBLOCK
, FD_CLOEXEC
, FD_CLOEXEC
);
806 fdflags(ofd
, O_NONBLOCK
, O_NONBLOCK
, FD_CLOEXEC
, FD_CLOEXEC
);
808 selbuf_init(&px
->b
, &sel
, fd
, pixserv_line
, px
);
809 px
->b
.b
.a
= arena_secure
;
810 selbuf_setsize(&px
->b
, 1024);
811 gettimeofday(&tv
, 0);
812 tv
.tv_sec
+= PIXSERV_TIMEOUT
;
813 sel_addtimer(&sel
, &px
->timer
, &tv
, pixserv_expire
, px
);
818 /* --- @pixserv_accept@ --- *
820 * Arguments: @int fd@ = file descriptor
821 * @unsigned mode@ = what's happened
822 * @void *p@ = an uninteresting argument
826 * Use: Accepts a new connection.
829 static void pixserv_accept(int fd
, unsigned mode
, void *p
)
832 struct sockaddr_un sun
;
833 size_t sunsz
= sizeof(sun
);
835 if (mode
!= SEL_READ
)
837 if ((nfd
= accept(fd
, (struct sockaddr
*)&sun
, &sunsz
)) < 0) {
838 if (verbose
&& errno
!= EAGAIN
&& errno
!= EWOULDBLOCK
&&
839 errno
!= ECONNABORTED
&& errno
!= EPROTO
&& errno
!= EINTR
)
840 log("new connection failed: %s", strerror(errno
));
843 pixserv_create(nfd
, nfd
);
846 /*----- Setting up the server ---------------------------------------------*/
848 /* --- @unlinksocket@ --- *
854 * Use: Tidies up the socket when it's finished with.
857 static char *sockpath
;
859 static void unlinksocket(void)
865 /* --- @pix_sigdie@ --- *
867 * Arguments: @int sig@ = signal number
868 * @void *p@ = uninteresting argument
872 * Use: Shuts down the program after a fatal signal.
875 static void pix_sigdie(int sig
, void *p
)
882 case SIGTERM
: p
= "SIGTERM"; break;
883 case SIGINT
: p
= "SIGINT"; break;
885 sprintf(buf
, "signal %i", sig
);
889 log("shutting down on %s", p
);
894 /* --- @pix_sigflush@ --- *
896 * Arguments: @int sig@ = signal number
897 * @void *p@ = uninteresting argument
901 * Use: Flushes the passphrase cache on receipt of a signal.
904 static void pix_sigflush(int sig
, void *p
)
911 case SIGHUP
: p
= "SIGHUP"; break;
912 case SIGQUIT
: p
= "SIGQUIT"; break;
914 sprintf(buf
, "signal %i", sig
);
918 log("received %s; flushing passphrases", p
);
923 /* --- @pix_setup@ --- *
925 * Arguments: @struct sockaddr_un *sun@ = pointer to address to use
926 * @size_t sz@ = size of socket address
930 * Use: Sets up the pixie's Unix-domain socket.
933 static void pix_setup(struct sockaddr_un
*sun
, size_t sz
)
937 /* --- Set up the parent directory --- */
940 char *p
= sun
->sun_path
;
941 char *q
= strrchr(p
, '/');
951 if (stat(d
.buf
, &st
))
952 die(1, "couldn't stat `%s': %s", d
.buf
, strerror(errno
));
953 if (!S_ISDIR(st
.st_mode
))
954 die(1, "object `%s' isn't a directory", d
.buf
);
955 if (st
.st_mode
& 0077)
956 die(1, "parent directory `%s' has group or world access", d
.buf
);
961 /* --- Initialize the socket --- */
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) {
973 if (errno
!= EADDRINUSE
)
974 die(1, "couldn't bind to address: %s", strerror(e
));
976 die(1, "too many retries; giving up");
978 if (connect(fd
, (struct sockaddr
*)sun
, sz
)) {
980 if (errno
!= ECONNREFUSED
)
981 die(1, "couldn't bind to address: %s", strerror(e
));
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
);
987 log("stale socket found; removing it");
988 unlink(sun
->sun_path
);
992 log("server already running; shutting it down");
993 write(fd
, "QUIT\n", 5);
999 chmod(sun
->sun_path
, 0600);
1000 fdflags(fd
, O_NONBLOCK
, O_NONBLOCK
, FD_CLOEXEC
, FD_CLOEXEC
);
1002 die(1, "couldn't listen on socket: %s", strerror(errno
));
1005 /* --- Set up the rest of the server --- */
1008 static sel_file serv
;
1009 sockpath
= sun
->sun_path
;
1010 atexit(unlinksocket
);
1011 sel_initfile(&sel
, &serv
, fd
, SEL_READ
, pixserv_accept
, 0);
1016 /*----- Client support code -----------------------------------------------*/
1018 /* --- Variables --- */
1020 static selbuf c_server
, c_client
;
1021 static unsigned c_flags
= 0;
1023 #define cf_uclose 1u
1024 #define cf_sclose 2u
1025 #define cf_cooked 4u
1027 /* --- Line handler functions --- */
1029 static void c_uline(char *s
, size_t len
, void *p
)
1032 selbuf_destroy(&c_client
);
1033 shutdown(c_server
.reader
.fd
, 1);
1034 c_flags
|= cf_uclose
;
1037 write(c_server
.reader
.fd
, s
, len
);
1041 static void c_sline(char *s
, size_t len
, void *p
)
1044 selbuf_destroy(&c_server
);
1045 if (!(c_flags
& cf_uclose
)) {
1046 moan("server closed the connection");
1047 selbuf_destroy(&c_client
);
1051 if (!(c_flags
& cf_cooked
))
1054 char *q
= str_getword(&s
);
1055 if (strcmp(q
, "FAIL") == 0)
1057 else if (strcmp(q
, "INFO") == 0 ||
1058 strcmp(q
, "ITEM") == 0)
1060 else if (strcmp(q
, "OK") == 0) {
1061 if (s
&& *s
) puts(s
);
1062 } else if (strcmp(q
, "MISSING") == 0)
1065 moan("unexpected output: %s %s", q
, s
);
1069 /* --- @pix_client@ --- *
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
1077 * Use: Performs client-side actions for the passphrase pixie.
1080 static void pix_client(struct sockaddr_un
*sun
, size_t sz
, char *argv
[])
1084 /* --- Dispose of locked memory --- */
1088 /* --- Open the socket --- */
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);
1096 /* --- If there are any arguments, turn them into a string --- */
1099 selbuf_init(&c_client
, &sel
, STDIN_FILENO
, c_uline
, 0);
1108 write(fd
, d
.buf
, d
.len
);
1110 c_flags
|= cf_uclose
| cf_cooked
;
1114 /* --- And repeat --- */
1117 if (sel_select(&sel
))
1118 die(EXIT_FAILURE
, "select error: %s", strerror(errno
));
1122 /*----- Main code ---------------------------------------------------------*/
1124 /* --- @help@, @version@, @usage@ --- *
1126 * Arguments: @FILE *fp@ = stream to write on
1130 * Use: Emit helpful messages.
1133 static void usage(FILE *fp
)
1137 $ [-qvfidl] [-c COMMAND] [-t TIMEOUT] [-s SOCKET]\n\
1138 $ [-s SOCKET] -C [COMMAND ARGS...]\n\
1139 $ [-s SOCKET] -P[P] TAG\n\
1143 static void version(FILE *fp
)
1145 pquis(fp
, "$, Catacomb version " VERSION
"\n");
1148 static void help(FILE *fp
)
1154 The Catacomb passphrase pixie collects and caches passphrases used to\n\
1155 protect important keys. Options provided:\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\
1161 -C, --client Connect to a running pixie as a client.\n\
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\
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\
1170 -f, --fetch Fetch passphrases from the terminal.\n\
1171 -t, --timeout=TIMEOUT Length of time to retain a passphrase in memory.\n\
1172 -i, --interactive Allow commands to be typed interactively.\n\
1173 -d, --daemon Fork into the background after initialization.\n\
1174 -l, --syslog Emit log messages to the system log.\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\
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\
1190 * Arguments: @int argc@ = number of arguments
1191 * @char *argv[]@ = vector of argument values
1193 * Returns: Zero if OK.
1195 * Use: Main program. Listens on a socket and responds with a PGP
1196 * passphrase when asked.
1199 int main(int argc
, char *argv
[])
1202 struct sockaddr_un
*sun
;
1210 #define f_syslog 16u
1212 #define f_verify 64u
1214 /* --- Initialize libraries --- */
1219 /* --- Set up the locked memory area --- */
1224 /* --- Parse command line arguments --- */
1227 static struct option opts
[] = {
1229 /* --- Standard GNUy help options --- */
1231 { "help", 0, 0, 'h' },
1232 { "version", 0, 0, 'V' },
1233 { "usage", 0, 0, 'u' },
1235 /* --- Other options --- */
1237 { "quiet", 0, 0, 'q' },
1238 { "verbose", 0, 0, 'v' },
1239 { "client", 0, 0, 'C' },
1240 { "passphrase", 0, 0, 'P' },
1241 { "verify-passphrase", 0, 0, '+' },
1242 { "socket", OPTF_ARGREQ
, 0, 's' },
1243 { "command", OPTF_ARGREQ
, 0, 'c' },
1244 { "fetch", 0, 0, 'f' },
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' },
1252 /* --- Magic terminator --- */
1257 int i
= mdwopt(argc
, argv
, "hVuqvCPs:c:ft:idl", opts
, 0, 0, 0);
1263 /* --- GNUy help options --- */
1275 /* --- Other interesting things --- */
1295 f
|= f_fetch
| f_verify
;
1302 if ((timeout
= pixserv_timeout(optarg
)) == 0)
1303 die(1, "bad timeout `%s'", optarg
);
1322 /* --- Something else --- */
1331 (optind
< argc
&& !(f
& (f_client
|f_fetch
))) ||
1332 ((f
& f_fetch
) && optind
!= argc
- 1)) {
1337 /* --- Handle request for a passphrase --- */
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
,
1345 die(1, "failed to read passphrase: %s", strerror(errno
));
1350 /* --- Set up the socket address --- */
1352 sun
= pixie_address(path
, &sz
);
1354 /* --- Initialize selectory --- */
1357 signal(SIGPIPE
, SIG_IGN
);
1359 /* --- Be a client if a client's wanted --- */
1362 pix_client(sun
, sz
, argv
+ optind
);
1364 /* --- Open the syslog if requested --- */
1368 openlog(QUIS
, 0, LOG_DAEMON
);
1371 /* --- Check on the locked memory area --- */
1375 int rc
= l_report(&lm
, &d
);
1377 die(EXIT_FAILURE
, d
.buf
);
1378 else if (rc
&& verbose
) {
1380 log("couldn't lock passphrase buffer");
1383 arena_setsecure(&lm
.a
);
1386 /* --- Set signal behaviours --- */
1389 static sig sigint
, sigterm
, sigquit
, sighup
;
1390 struct sigaction sa
;
1392 sigaction(SIGINT
, 0, &sa
);
1393 if (sa
.sa_handler
!= SIG_IGN
)
1394 sig_add(&sigint
, SIGINT
, pix_sigdie
, 0);
1395 sig_add(&sigterm
, SIGTERM
, pix_sigdie
, 0);
1396 sig_add(&sigquit
, SIGQUIT
, pix_sigflush
, 0);
1397 sig_add(&sighup
, SIGHUP
, pix_sigflush
, 0);
1400 /* --- Set up the server --- */
1404 pixserv
*px
= pixserv_create(STDIN_FILENO
, STDOUT_FILENO
);
1405 sel_rmtimer(&px
->timer
);
1409 /* --- Fork into the background if requested --- */
1414 if (((f
& f_stdin
) &&
1415 (isatty(STDIN_FILENO
) || isatty(STDOUT_FILENO
))) ||
1416 (!command
&& (flags
& F_FETCH
)))
1417 die(1, "can't become a daemon if terminal required");
1419 if ((kid
= fork()) < 0)
1420 die(1, "fork failed: %s", strerror(errno
));
1426 if ((fd
= open("/dev/tty", O_RDONLY
)) >= 0) {
1427 ioctl(fd
, TIOCNOTTY
);
1440 log("initialized ok");
1445 if (!sel_select(&sel
))
1447 else if (errno
!= EINTR
&& errno
!= EAGAIN
) {
1448 log("error from select: %s", strerror(errno
));
1451 log("too many consecutive select errors: bailing out");
1460 /*----- That's all, folks -------------------------------------------------*/