dnssec-signer.c revision 484076c3255e0cc5b179ad736cd930900e4bb06b
/*****************************************************************
**
** @(#) dnssec-signer.c (c) Jan 2005 Holger Zuleger hznet.de
**
** A wrapper around the BIND dnssec-signzone command which is able
** to resign a zone if necessary and doing a zone or key signing key rollover.
**
** Copyright (c) 2005 - 2008, Holger Zuleger HZnet. All rights reserved.
** This software is open source.
**
** Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions
** are met:
**
** Redistributions of source code must retain the above copyright notice,
** this list of conditions and the following disclaimer.
**
** Redistributions in binary form must reproduce the above copyright notice,
** this list of conditions and the following disclaimer in the documentation
** and/or other materials provided with the distribution.
**
** Neither the name of Holger Zuleger HZnet nor the names of its contributors may
** be used to endorse or promote products derived from this software without
** specific prior written permission.
**
** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
** TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
** PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE
** LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
** CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
** SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
** INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
** CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
** ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
** POSSIBILITY OF SUCH DAMAGE.
**
*****************************************************************/
# include <stdio.h>
# include <string.h>
# include <stdlib.h>
# include <assert.h>
# include <dirent.h>
# include <errno.h>
# include <unistd.h>
# include <ctype.h>
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
# include "config_zkt.h"
#if defined(HAVE_GETOPT_LONG) && HAVE_GETOPT_LONG
# include <getopt.h>
#endif
# include "zconf.h"
# include "debug.h"
# include "misc.h"
# include "ncparse.h"
# include "nscomm.h"
# include "soaserial.h"
# include "zone.h"
# include "dki.h"
# include "rollover.h"
# include "log.h"
#if defined(BIND_VERSION) && BIND_VERSION >= 940
# define short_options "c:L:V:D:N:o:O:dfHhnrv"
#else
# define short_options "c:L:V:D:N:o:O:fHhnrv"
#endif
#if defined(HAVE_GETOPT_LONG) && HAVE_GETOPT_LONG
static struct option long_options[] = {
{"reload", no_argument, NULL, 'r'},
{"force", no_argument, NULL, 'f'},
{"noexec", no_argument, NULL, 'n'},
{"verbose", no_argument, NULL, 'v'},
{"directory", no_argument, NULL, 'd'},
{"config", required_argument, NULL, 'c'},
{"option", required_argument, NULL, 'O'},
{"config-option", required_argument, NULL, 'O'},
{"logfile", required_argument, NULL, 'L' },
{"view", required_argument, NULL, 'V' },
{"directory", required_argument, NULL, 'D'},
{"named-conf", required_argument, NULL, 'N'},
{"origin", required_argument, NULL, 'o'},
#if defined(BIND_VERSION) && BIND_VERSION >= 940
{"dynamic", no_argument, NULL, 'd' },
#endif
{"help", no_argument, NULL, 'h'},
{0, 0, 0, 0}
};
#endif
/** function declaration **/
static void usage (char *mesg, zconf_t *conf);
static int add2zonelist (const char *dir, const char *view, const char *zone, const char *file);
static int parsedir (const char *dir, zone_t **zp, const zconf_t *conf);
static int dosigning (zone_t *zonelist, zone_t *zp);
static int check_keydb_timestamp (dki_t *keylist, time_t reftime);
static int new_keysetfiles (const char *dir, time_t zone_signing_time);
static int writekeyfile (const char *fname, const dki_t *list, int key_ttl);
static int sign_zone (const char *dir, const char *domain, const char *file, const zconf_t *conf);
static void register_key (dki_t *listp, const zconf_t *z);
static void copy_keyset (const char *dir, const char *domain, const zconf_t *conf);
/** global command line options **/
extern int optopt;
extern int opterr;
extern int optind;
extern char *optarg;
const char *progname;
static const char *viewname = NULL;
static const char *logfile = NULL;
static const char *origin = NULL;
static const char *namedconf = NULL;
static const char *dirname = NULL;
static int verbose = 0;
static int force = 0;
static int reloadflag = 0;
static int noexec = 0;
static int dynamic_zone = 0; /* dynamic zone ? */
static zone_t *zonelist = NULL; /* must be static global because add2zonelist use it */
static zconf_t *config;
/** macros **/
#define set_bind94_dynzone(dz) ((dz) = 1)
#define set_bind96_dynzone(dz) ((dz) = 6)
#define bind94_dynzone(dz) ( (dz) > 0 && (dz) < 6 )
#define bind96_dynzone(dz) ( (dz) >= 6 )
int main (int argc, char *const argv[])
{
int c;
int errcnt;
#if defined(HAVE_GETOPT_LONG) && HAVE_GETOPT_LONG
int opt_index;
#endif
char errstr[255+1];
char *p;
const char *defconfname;
zone_t *zp;
progname = *argv;
if ( (p = strrchr (progname, '/')) )
progname = ++p;
viewname = getnameappendix (progname, "dnssec-signer");
defconfname = getdefconfname (viewname);
config = loadconfig ("", (zconf_t *)NULL); /* load build-in config */
if ( fileexist (defconfname) ) /* load default config file */
config = loadconfig (defconfname, config);
if ( config == NULL )
fatal ("Couldn't load config: Out of memory\n");
zonelist = NULL;
opterr = 0;
#if defined(HAVE_GETOPT_LONG) && HAVE_GETOPT_LONG
while ( (c = getopt_long (argc, argv, short_options, long_options, &opt_index)) != -1 )
#else
while ( (c = getopt (argc, argv, short_options)) != -1 )
#endif
{
switch ( c )
{
case 'V': /* view name */
viewname = optarg;
defconfname = getdefconfname (viewname);
if ( fileexist (defconfname) ) /* load default config file */
config = loadconfig (defconfname, config);
if ( config == NULL )
fatal ("Out of memory\n");
break;
case 'c': /* load config from file */
config = loadconfig (optarg, config);
if ( config == NULL )
fatal ("Out of memory\n");
break;
case 'O': /* load config option from commandline */
config = loadconfig_fromstr (optarg, config);
if ( config == NULL )
fatal ("Out of memory\n");
break;
case 'o':
origin = optarg;
break;
case 'N':
namedconf = optarg;
break;
case 'D':
dirname = optarg;
break;
case 'L': /* error log file|directory */
logfile = optarg;
break;
case 'f':
force++;
break;
case 'H':
case 'h':
usage (NULL, config);
break;
#if defined(BIND_VERSION) && BIND_VERSION >= 940
case 'd':
# if BIND_VERSION >= 960
set_bind96_dynzone (dynamic_zone);
# else
set_bind94_dynzone(dynamic_zone);
# endif
/* dynamic zone requires a name server reload... */
reloadflag = 0; /* ...but "rndc thaw" reloads the zone anyway */
break;
#endif
case 'n':
noexec = 1;
break;
case 'r':
if ( !dynamic_zone ) /* dynamic zones don't need a rndc reload (see "-d" */
reloadflag = 1;
break;
case 'v':
verbose++;
break;
case '?':
if ( isprint (optopt) )
snprintf (errstr, sizeof(errstr),
"Unknown option \"-%c\".\n", optopt);
else
snprintf (errstr, sizeof (errstr),
"Unknown option char \\x%x.\n", optopt);
usage (errstr, config);
break;
default:
abort();
}
}
dbg_line();
/* store some of the commandline parameter in the config structure */
setconfigpar (config, "--view", viewname);
setconfigpar (config, "-v", &verbose);
setconfigpar (config, "--noexec", &noexec);
if ( logfile == NULL )
logfile = config->logfile;
if ( lg_open (progname, config->syslogfacility, config->sysloglevel, config->zonedir, logfile, config->loglevel) < -1 )
fatal ("Couldn't open logfile %s in dir %s\n", logfile, config->zonedir);
#if defined(DBG) && DBG
for ( zp = zonelist; zp; zp = zp->next )
zone_print ("in main: ", zp);
#endif
lg_args (LG_NOTICE, argc, argv);
if ( origin ) /* option -o ? */
{
int ret;
if ( (argc - optind) <= 0 ) /* no arguments left ? */
ret = zone_readdir (".", origin, NULL, &zonelist, config, dynamic_zone);
else
ret = zone_readdir (".", origin, argv[optind], &zonelist, config, dynamic_zone);
/* anyway, "delete" all (remaining) arguments */
optind = argc;
/* complain if nothing could read in */
if ( ret != 1 || zonelist == NULL )
{
lg_mesg (LG_FATAL, "\"%s\": couldn't read", origin);
fatal ("Couldn't read zone \"%s\"\n", origin);
}
}
if ( namedconf ) /* option -N ? */
{
char dir[255+1];
memset (dir, '\0', sizeof (dir));
if ( config->zonedir )
strncpy (dir, config->zonedir, sizeof(dir));
if ( !parse_namedconf (namedconf, config->chroot_dir, dir, sizeof (dir), add2zonelist) )
fatal ("Can't read file %s as namedconf file\n", namedconf);
if ( zonelist == NULL )
fatal ("No signed zone found in file %s\n", namedconf);
}
if ( dirname ) /* option -D ? */
{
char *dir = strdup (dirname);
p = dir + strlen (dir);
if ( p > dir )
p--;
if ( *p == '/' )
*p = '\0'; /* remove trailing path seperator */
if ( !parsedir (dir, &zonelist, config) )
fatal ("Can't read directory tree %s\n", dir);
if ( zonelist == NULL )
fatal ("No signed zone found in directory tree %s\n", dir);
free (dir);
}
/* none of the above: read current directory tree */
if ( zonelist == NULL )
parsedir (config->zonedir, &zonelist, config);
for ( zp = zonelist; zp; zp = zp->next )
if ( in_strarr (zp->zone, &argv[optind], argc - optind) )
{
dosigning (zonelist, zp);
verbmesg (1, zp->conf, "\n");
}
zone_freelist (&zonelist);
errcnt = lg_geterrcnt ();
lg_mesg (LG_NOTICE, "end of run: %d error%s occured", errcnt, errcnt == 1 ? "" : "s");
lg_close ();
return errcnt < 64 ? errcnt : 64;
}
# define sopt_usage(mesg, value) fprintf (stderr, mesg, value)
#if defined(HAVE_GETOPT_LONG) && HAVE_GETOPT_LONG
# define lopt_usage(mesg, value) fprintf (stderr, mesg, value)
# define loptstr(lstr, sstr) lstr
#else
# define lopt_usage(mesg, value)
# define loptstr(lstr, sstr) sstr
#endif
static void usage (char *mesg, zconf_t *conf)
{
fprintf (stderr, "%s version %s\n", progname, ZKT_VERSION);
fprintf (stderr, "\n");
fprintf (stderr, "usage: %s [-c file] [-O optstr] ", progname);
fprintf (stderr, "[-D directorytree] ");
fprintf (stderr, "[-fhnr] [-v [-v]] [zone ...]\n");
fprintf (stderr, "usage: %s [-c file] [-O optstr] ", progname);
fprintf (stderr, "-N named.conf ");
fprintf (stderr, "[-fhnr] [-v [-v]] [zone ...]\n");
fprintf (stderr, "usage: %s [-c file] [-O optstr] ", progname);
fprintf (stderr, "-o origin ");
fprintf (stderr, "[-fhnr] [-v [-v]] [zonefile.signed]\n");
fprintf (stderr, "\t-c file%s", loptstr (", --config=file\n", ""));
fprintf (stderr, "\t\t read config from <file> instead of %s\n", CONFIG_FILE);
fprintf (stderr, "\t-O optstr%s", loptstr (", --config-option=\"optstr\"\n", ""));
fprintf (stderr, "\t\t set config options on the commandline\n");
fprintf (stderr, "\t-L file|dir%s", loptstr (", --logfile=file|dir\n", ""));
fprintf (stderr, "\t\t specify file or directory for the log output\n");
fprintf (stderr, "\t-D dir%s", loptstr (", --directory=dir\n", ""));
fprintf (stderr, "\t\t parse the given directory tree for a list of secure zones \n");
fprintf (stderr, "\t-N file%s", loptstr (", --named-conf=file\n", ""));
fprintf (stderr, "\t\t get the list of secure zones out of the named like config file \n");
fprintf (stderr, "\t-o zone%s", loptstr (", --origin=zone", ""));
fprintf (stderr, "\tspecify the name of the zone \n");
fprintf (stderr, "\t\t The file to sign should be given as an argument (default is \"%s.signed\")\n", conf->zonefile);
fprintf (stderr, "\t-h%s\t print this help\n", loptstr (", --help", "\t"));
fprintf (stderr, "\t-f%s\t force re-signing\n", loptstr (", --force", "\t"));
fprintf (stderr, "\t-n%s\t no execution of external signing command\n", loptstr (", --noexec", "\t"));
// fprintf (stderr, "\t-r%s\t reload zone via <rndc reload zone> (or via the external distribution command)\n", loptstr (", --reload", "\t"));
fprintf (stderr, "\t-r%s\t reload zone via %s\n", loptstr (", --reload", "\t"), conf->dist_cmd ? conf->dist_cmd: "rndc");
fprintf (stderr, "\t-v%s\t be verbose (use twice to be very verbose)\n", loptstr (", --verbose", "\t"));
fprintf (stderr, "\t[zone]\t sign only those zones given as argument\n");
fprintf (stderr, "\n");
fprintf (stderr, "\tif neither -D nor -N nor -o is given, the directory tree specified\n");
fprintf (stderr, "\tin the dnssec config file (\"%s\") will be parsed\n", conf->zonedir);
if ( mesg && *mesg )
fprintf (stderr, "%s\n", mesg);
exit (127);
}
/** fill zonelist with infos coming out of named.conf **/
static int add2zonelist (const char *dir, const char *view, const char *zone, const char *file)
{
#ifdef DBG
fprintf (stderr, "printzone ");
fprintf (stderr, "view \"%s\" " , view);
fprintf (stderr, "zone \"%s\" " , zone);
fprintf (stderr, "file ");
if ( dir && *dir )
fprintf (stderr, "%s/", dir);
fprintf (stderr, "%s", file);
fprintf (stderr, "\n");
#endif
dbg_line ();
if ( view[0] != '\0' ) /* view found in named.conf */
{
if ( viewname == NULL || viewname[0] == '\0' ) /* viewname wasn't set on startup ? */
{
dbg_line ();
error ("zone \"%s\" in view \"%s\" found in name server config, but no matching view was set on startup\n", zone, view);
lg_mesg (LG_ERROR, "\"%s\" in view \"%s\" found in name server config, but no matching view was set on startup", zone, view);
return 0;
}
dbg_line ();
if ( strcmp (viewname, view) != 0 ) /* zone is _not_ in current view */
return 0;
}
return zone_readdir (dir, zone, file, &zonelist, config, dynamic_zone);
}
static int parsedir (const char *dir, zone_t **zp, const zconf_t *conf)
{
DIR *dirp;
struct dirent *dentp;
char path[MAX_PATHSIZE+1];
dbg_val ("parsedir: (%s)\n", dir);
if ( !is_directory (dir) )
return 0;
dbg_line ();
zone_readdir (dir, NULL, NULL, zp, conf, dynamic_zone);
dbg_val ("parsedir: opendir(%s)\n", dir);
if ( (dirp = opendir (dir)) == NULL )
return 0;
while ( (dentp = readdir (dirp)) != NULL )
{
if ( is_dotfilename (dentp->d_name) )
continue;
pathname (path, sizeof (path), dir, dentp->d_name, NULL);
if ( !is_directory (path) )
continue;
dbg_val ("parsedir: recursive %s\n", path);
parsedir (path, zp, conf);
}
closedir (dirp);
return 1;
}
static int dosigning (zone_t *zonelist, zone_t *zp)
{
char path[MAX_PATHSIZE+1];
int err;
int newkey;
int newkeysetfile;
int use_unixtime;
time_t currtime;
time_t zfile_time;
time_t zfilesig_time;
char mesg[255+1];
verbmesg (1, zp->conf, "parsing zone \"%s\" in dir \"%s\"\n", zp->zone, zp->dir);
pathname (path, sizeof (path), zp->dir, zp->sfile, NULL);
dbg_val("parsezonedir fileexist (%s)\n", path);
if ( !fileexist (path) )
{
error ("Not a secure zone directory (%s)!\n", zp->dir);
lg_mesg (LG_ERROR, "\"%s\": not a secure zone directory (%s)!", zp->zone, zp->dir);
return 1;
}
zfilesig_time = file_mtime (path);
pathname (path, sizeof (path), zp->dir, zp->file, NULL);
dbg_val("parsezonedir fileexist (%s)\n", path);
if ( !fileexist (path) )
{
error ("No zone file found (%s)!\n", path);
lg_mesg (LG_ERROR, "\"%s\": no zone file found (%s)!", zp->zone, path);
return 2;
}
zfile_time = file_mtime (path);
currtime = time (NULL);
/* check rfc5011 key signing keys, create new one if necessary */
dbg_msg("parsezonedir check rfc 5011 ksk ");
newkey = ksk5011status (&zp->keys, zp->dir, zp->zone, zp->conf);
if ( (newkey & 02) != 02 ) /* not a rfc 5011 zone ? */
{
verbmesg (2, zp->conf, "\t\t->not a rfc5011 zone, looking for a regular ksk rollover\n");
/* check key signing keys, create new one if necessary */
dbg_msg("parsezonedir check ksk ");
newkey |= kskstatus (zonelist, zp);
}
else
newkey &= ~02; /* reset bit 2 */
/* check age of zone keys, probably retire (depreciate) or remove old keys */
dbg_msg("parsezonedir check zsk ");
newkey += zskstatus (&zp->keys, zp->dir, zp->zone, zp->conf);
/* check age of "dnskey.db" file against age of keyfiles */
pathname (path, sizeof (path), zp->dir, zp->conf->keyfile, NULL);
dbg_val("parsezonedir check_keydb_timestamp (%s)\n", path);
if ( !newkey )
newkey = check_keydb_timestamp (zp->keys, file_mtime (path));
newkeysetfile = 0;
#if defined(ALWAYS_CHECK_KEYSETFILES) && ALWAYS_CHECK_KEYSETFILES /* patch from Shane Wegner 15. June 2009 */
/* check if there is a new keyset- file */
if ( !newkey )
newkeysetfile = new_keysetfiles (zp->dir, zfilesig_time);
#else
/* if we work in subdir mode, check if there is a new keyset- file */
if ( !newkey && zp->conf->keysetdir && strcmp (zp->conf->keysetdir, "..") == 0 )
newkeysetfile = new_keysetfiles (zp->dir, zfilesig_time);
#endif
/**
** Check if it is time to do a re-sign. This is the case if
** a) the command line flag -f is set, or
** b) new keys are generated, or
** c) we found a new KSK of a delegated domain, or
** d) the "dnskey.db" file is newer than "zone.db"
** e) the "zone.db" is newer than "zone.db.signed" or
** f) "zone.db.signed" is older than the re-sign interval
**/
mesg[0] = '\0';
if ( force )
snprintf (mesg, sizeof(mesg), "Option -f");
else if ( newkey )
snprintf (mesg, sizeof(mesg), "Modfied zone key set");
else if ( newkeysetfile )
snprintf (mesg, sizeof(mesg), "Modified KSK in delegated domain");
else if ( file_mtime (path) > zfilesig_time )
snprintf (mesg, sizeof(mesg), "Modified keys");
else if ( zfile_time > zfilesig_time )
snprintf (mesg, sizeof(mesg), "Zone file edited");
else if ( (currtime - zfilesig_time) > zp->conf->resign - (OFFSET) )
snprintf (mesg, sizeof(mesg), "re-signing interval (%s) reached",
str_delspace (age2str (zp->conf->resign)));
else if ( bind94_dynzone (dynamic_zone) )
snprintf (mesg, sizeof(mesg), "dynamic zone");
if ( *mesg )
verbmesg (1, zp->conf, "\tRe-signing necessary: %s\n", mesg);
else
verbmesg (1, zp->conf, "\tRe-signing not necessary!\n");
if ( *mesg )
lg_mesg (LG_NOTICE, "\"%s\": re-signing triggered: %s", zp->zone, mesg);
dbg_line ();
if ( !(force || newkey || newkeysetfile || zfile_time > zfilesig_time ||
file_mtime (path) > zfilesig_time ||
(currtime - zfilesig_time) > zp->conf->resign - (OFFSET) ||
bind94_dynzone (dynamic_zone)) )
{
verbmesg (2, zp->conf, "\tCheck if there is a parent file to copy\n");
if ( zp->conf->keysetdir && strcmp (zp->conf->keysetdir, "..") == 0 )
copy_keyset (zp->dir, zp->zone, zp->conf); /* copy the parent- file if it exist */
return 0; /* nothing to do */
}
/* let's start signing the zone */
dbg_line ();
/* create new "dnskey.db" file */
pathname (path, sizeof (path), zp->dir, zp->conf->keyfile, NULL);
verbmesg (1, zp->conf, "\tWriting key file \"%s\"\n", path);
if ( !writekeyfile (path, zp->keys, zp->conf->key_ttl) )
{
error ("Can't create keyfile %s \n", path);
lg_mesg (LG_ERROR, "\"%s\": can't create keyfile %s", zp->zone , path);
}
err = 1;
use_unixtime = ( zp->conf->serialform == Unixtime );
dbg_val1 ("Use unixtime = %d\n", use_unixtime);
#if defined(BIND_VERSION) && BIND_VERSION >= 940
if ( !dynamic_zone && !use_unixtime ) /* increment serial number in static zone files */
#else
if ( !dynamic_zone ) /* increment serial no in static zone files */
#endif
{
pathname (path, sizeof (path), zp->dir, zp->file, NULL);
err = 0;
if ( noexec == 0 )
{
if ( (err = inc_serial (path, use_unixtime)) < 0 )
{
error ("could not increment serialno of domain %s in file %s: %s!\n",
zp->zone, path, inc_errstr (err));
lg_mesg (LG_ERROR,
"zone \"%s\": couldn't increment serialno in file %s: %s",
zp->zone, path, inc_errstr (err));
}
else
verbmesg (1, zp->conf, "\tIncrementing serial number in file \"%s\"\n", path);
}
else
verbmesg (1, zp->conf, "\tIncrementing serial number in file \"%s\"\n", path);
}
/* at last, sign the zone file */
if ( err > 0 )
{
time_t timer;
verbmesg (1, zp->conf, "\tSigning zone \"%s\"\n", zp->zone);
logflush ();
/* dynamic zones uses incremental signing, so we have to */
/* prepare the old (signed) file as new input file */
if ( dynamic_zone )
{
char zfile[MAX_PATHSIZE+1];
dyn_update_freeze (zp->zone, zp->conf, 1); /* freeze dynamic zone ! */
pathname (zfile, sizeof (zfile), zp->dir, zp->file, NULL);
pathname (path, sizeof (path), zp->dir, zp->sfile, NULL);
if ( filesize (path) == 0L ) /* initial signing request ? */
{
verbmesg (1, zp->conf, "\tDynamic Zone signing: Initial signing request: Add DNSKEYs to zonefile\n");
copyfile (zfile, path, zp->conf->keyfile);
}
#if 1
else if ( zfile_time > zfilesig_time ) /* zone.db is newer than signed file */
{
verbmesg (1, zp->conf, "\tDynamic Zone signing: zone file manually edited: Use it as new input file\n");
copyfile (zfile, path, NULL);
}
#endif
verbmesg (1, zp->conf, "\tDynamic Zone signing: copy old signed zone file %s to new input file %s\n",
path, zfile);
if ( newkey ) /* if we have new keys, they should be added to the zone file */
copyzonefile (path, zfile, zp->conf->keyfile);
else /* else we can do a simple file copy */
copyfile (path, zfile, NULL);
}
timer = start_timer ();
if ( (err = sign_zone (zp->dir, zp->zone, zp->file, zp->conf)) < 0 )
{
error ("\tSigning of zone %s failed (%d)!\n", zp->zone, err);
lg_mesg (LG_ERROR, "\"%s\": signing failed!", zp->zone);
}
timer = stop_timer (timer);
if ( dynamic_zone )
dyn_update_freeze (zp->zone, zp->conf, 0); /* thaw dynamic zone file */
if ( err >= 0 )
{
const char *tstr = str_delspace (age2str (timer));
if ( !tstr || *tstr == '\0' )
tstr = "0s";
verbmesg (1, zp->conf, "\tSigning completed after %s.\n", tstr);
}
}
copy_keyset (zp->dir, zp->zone, zp->conf);
if ( err >= 0 && reloadflag )
{
if ( zp->conf->dist_cmd )
dist_and_reload (zp);
else
reload_zone (zp->zone, zp->conf);
register_key (zp->keys, zp->conf);
}
return err;
}
static void register_key (dki_t *list, const zconf_t *z)
{
dki_t *dkp;
time_t currtime;
time_t age;
assert ( list != NULL );
assert ( z != NULL );
currtime = time (NULL);
for ( dkp = list; dkp && dki_isksk (dkp); dkp = dkp->next )
{
age = dki_age (dkp, currtime);
#if 0
/* announce "new" and active key signing keys */
if ( REG_URL && *REG_URL && dki_status (dkp) == DKI_ACT && age <= z->resign * 4 )
{
if ( verbose )
logmesg ("\tRegister new KSK with tag %d for domain %s\n",
dkp->tag, dkp->name);
}
#endif
}
}
/*
* This function is not working with symbolic links to keyset- files,
* because file_mtime() returns the mtime of the underlying file, and *not*
* that of the symlink file.
* This is bad, because the keyset-file will be newly generated by dnssec-signzone
* on every re-signing call.
* Instead, in the case of a hierarchical directory structure, we copy the file
* (and so we change the timestamp) only if it was modified after the last
* generation (checked with cmpfile(), see func sign_zone()).
*/
# define KEYSET_FILE_PFX "keyset-"
static int new_keysetfiles (const char *dir, time_t zone_signing_time)
{
DIR *dirp;
struct dirent *dentp;
char path[MAX_PATHSIZE+1];
int newkeysetfile;
if ( (dirp = opendir (dir)) == NULL )
return 0;
newkeysetfile = 0;
dbg_val2 ("new_keysetfile (%s, %s)\n", dir, time2str (zone_signing_time, 's'));
while ( !newkeysetfile && (dentp = readdir (dirp)) != NULL )
{
if ( strncmp (dentp->d_name, KEYSET_FILE_PFX, strlen (KEYSET_FILE_PFX)) != 0 )
continue;
pathname (path, sizeof (path), dir, dentp->d_name, NULL);
dbg_val2 ("newkeysetfile timestamp of %s = %s\n", path, time2str (file_mtime(path), 's'));
if ( file_mtime (path) > zone_signing_time )
newkeysetfile = 1;
}
closedir (dirp);
return newkeysetfile;
}
static int check_keydb_timestamp (dki_t *keylist, time_t reftime)
{
dki_t *key;
assert ( keylist != NULL );
if ( reftime == 0 )
return 1;
for ( key = keylist; key; key = key->next )
if ( dki_time (key) > reftime )
return 1;
return 0;
}
static int writekeyfile (const char *fname, const dki_t *list, int key_ttl)
{
FILE *fp;
const dki_t *dkp;
time_t curr = time (NULL);
int ksk;
if ( (fp = fopen (fname, "w")) == NULL )
return 0;
fprintf (fp, ";\n");
fprintf (fp, ";\t!!! Don\'t edit this file by hand.\n");
fprintf (fp, ";\t!!! It will be generated by %s.\n", progname);
fprintf (fp, ";\n");
fprintf (fp, ";\t Last generation time %s\n", time2str (curr, 's'));
fprintf (fp, ";\n");
fprintf (fp, "\n");
fprintf (fp, "; *** List of Key Signing Keys ***\n");
ksk = 1;
for ( dkp = list; dkp; dkp = dkp->next )
{
if ( ksk && !dki_isksk (dkp) )
{
fprintf (fp, "; *** List of Zone Signing Keys ***\n");
ksk = 0;
}
dki_prt_comment (dkp, fp);
dki_prt_dnskeyttl (dkp, fp, key_ttl);
putc ('\n', fp);
}
fclose (fp);
return 1;
}
static int sign_zone (const char *dir, const char *domain, const char *file, const zconf_t *conf)
{
char cmd[2047+1];
char str[1023+1];
char rparam[254+1];
char nsec3param[637+1];
char keysetdir[254+1];
const char *gends;
const char *pseudo;
const char *param;
int len;
FILE *fp;
assert (conf != NULL);
assert (domain != NULL);
len = 0;
str[0] = '\0';
if ( conf->lookaside && conf->lookaside[0] )
len = snprintf (str, sizeof (str), "-l %.250s", conf->lookaside);
dbg_line();
#if defined(BIND_VERSION) && BIND_VERSION >= 940
if ( !dynamic_zone && conf->serialform == Unixtime )
snprintf (str+len, sizeof (str) - len, " -N unixtime");
#endif
gends = "";
if ( conf->sig_gends )
gends = "-g ";
pseudo = "";
if ( conf->sig_pseudo )
pseudo = "-p ";
param = "";
if ( conf->sig_param && conf->sig_param[0] )
param = conf->sig_param;
nsec3param[0] = '\0';
#if defined(BIND_VERSION) && BIND_VERSION >= 960
if ( conf->k_algo == DK_ALGO_NSEC3DSA || conf->k_algo == DK_ALGO_NSEC3RSASHA1 )
{
char salt[510+1]; /* salt has a maximum of 255 bytes == 510 hex nibbles */
if ( gensalt (salt, sizeof (salt), conf->saltbits) )
snprintf (nsec3param, sizeof (nsec3param), "-3 %s ", salt);
}
#endif
dbg_line();
rparam[0] = '\0';
if ( conf->sig_random && conf->sig_random[0] )
snprintf (rparam, sizeof (rparam), "-r %.250s ", conf->sig_random);
dbg_line();
keysetdir[0] = '\0';
if ( conf->keysetdir && conf->keysetdir[0] && strcmp (conf->keysetdir, "..") != 0 )
snprintf (keysetdir, sizeof (keysetdir), "-d %.250s ", conf->keysetdir);
if ( dir == NULL || *dir == '\0' )
dir = ".";
dbg_line();
#if defined(BIND_VERSION) && BIND_VERSION >= 940
if ( dynamic_zone )
snprintf (cmd, sizeof (cmd), "cd %s; %s %s %s%s%s%s%s-o %s -e +%ld %s -N increment -f %s.dsigned %s K*.private 2>&1",
dir, SIGNCMD, param, nsec3param, gends, pseudo, rparam, keysetdir, domain, conf->sigvalidity, str, file, file);
else
#endif
snprintf (cmd, sizeof (cmd), "cd %s; %s %s %s%s%s%s%s-o %s -e +%ld %s %s K*.private 2>&1",
dir, SIGNCMD, param, nsec3param, gends, pseudo, rparam, keysetdir, domain, conf->sigvalidity, str, file);
verbmesg (2, conf, "\t Run cmd \"%s\"\n", cmd);
*str = '\0';
if ( noexec == 0 )
{
#if 0
if ( (fp = popen (cmd, "r")) == NULL || fgets (str, sizeof str, fp) == NULL )
return -1;
#else
if ( (fp = popen (cmd, "r")) == NULL )
return -1;
str[0] = '\0';
while ( fgets (str, sizeof str, fp) != NULL ) /* eat up all output until the last line */
;
#endif
pclose (fp);
}
dbg_line();
verbmesg (2, conf, "\t Cmd dnssec-signzone return: \"%s\"\n", str_chop (str, '\n'));
len = strlen (str) - 6;
if ( len < 0 || strcmp (str+len, "signed") != 0 )
return -1;
return 0;
}
static void copy_keyset (const char *dir, const char *domain, const zconf_t *conf)
{
char fromfile[1024];
char tofile[1024];
int ret;
/* propagate "keyset"-file to parent dir */
if ( conf->keysetdir && strcmp (conf->keysetdir, "..") == 0 )
{
/* check if special parent-file exist (ksk rollover) */
snprintf (fromfile, sizeof (fromfile), "%s/parent-%s", dir, domain);
if ( !fileexist (fromfile) ) /* use "normal" keyset-file */
snprintf (fromfile, sizeof (fromfile), "%s/keyset-%s", dir, domain);
/* verbmesg (2, conf, "\t check \"%s\" against parent dir\n", fromfile); */
snprintf (tofile, sizeof (tofile), "%s/../keyset-%s", dir, domain);
if ( cmpfile (fromfile, tofile) != 0 )
{
verbmesg (2, conf, "\t copy \"%s\" to parent dir\n", fromfile);
if ( (ret = copyfile (fromfile, tofile, NULL)) != 0 )
{
error ("Couldn't copy \"%s\" to parent dir (%d:%s)\n",
fromfile, ret, strerror(errno));
lg_mesg (LG_ERROR, "\%s\": can't copy \"%s\" to parent dir (%d:%s)",
domain, fromfile, ret, strerror(errno));
}
}
}
}