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/* Copyright (C) 2022 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
#include <assert.h>
#include "knot/common/log.h"
#include "knot/conf/conf.h"
#include "knot/dnssec/zone-events.h"
#include "knot/updates/apply.h"
#include "knot/zone/zone.h"
#include "libknot/errcode.h"
static void log_dnssec_next(const knot_dname_t *zone, knot_time_t refresh_at)
{
char time_str[64] = { 0 };
struct tm time_gm = { 0 };
time_t refresh = refresh_at;
localtime_r(&refresh, &time_gm);
strftime(time_str, sizeof(time_str), KNOT_LOG_TIME_FORMAT, &time_gm);
if (refresh_at == 0) {
log_zone_warning(zone, "DNSSEC, next signing not scheduled");
} else {
log_zone_info(zone, "DNSSEC, next signing at %s", time_str);
}
}
void event_dnssec_reschedule(conf_t *conf, zone_t *zone,
const zone_sign_reschedule_t *refresh, bool zone_changed)
{
time_t now = time(NULL);
time_t ignore = -1;
knot_time_t refresh_at = refresh->next_sign;
refresh_at = knot_time_min(refresh_at, refresh->next_rollover);
refresh_at = knot_time_min(refresh_at, refresh->next_nsec3resalt);
log_dnssec_next(zone->name, (time_t)refresh_at);
if (refresh->plan_ds_check) {
zone->timers.next_ds_check = now;
}
zone_events_schedule_at(zone,
ZONE_EVENT_DNSSEC, refresh_at ? (time_t)refresh_at : ignore,
ZONE_EVENT_DS_CHECK, refresh->plan_ds_check ? now : ignore
);
if (zone_changed) {
zone_schedule_notify(zone, 0);
}
}
int event_dnssec(conf_t *conf, zone_t *zone)
{
assert(zone);
zone_sign_reschedule_t resch = { 0 };
zone_sign_roll_flags_t r_flags = KEY_ROLL_ALLOW_ALL;
int sign_flags = 0;
bool zone_changed = false;
if (zone_get_flag(zone, ZONE_FORCE_RESIGN, true)) {
log_zone_info(zone->name, "DNSSEC, dropping previous "
"signatures, re-signing zone");
sign_flags = ZONE_SIGN_DROP_SIGNATURES;
} else {
log_zone_info(zone->name, "DNSSEC, signing zone");
sign_flags = 0;
}
if (zone_get_flag(zone, ZONE_FORCE_KSK_ROLL, true)) {
r_flags |= KEY_ROLL_FORCE_KSK_ROLL;
}
if (zone_get_flag(zone, ZONE_FORCE_ZSK_ROLL, true)) {
r_flags |= KEY_ROLL_FORCE_ZSK_ROLL;
}
zone_update_t up;
int ret = zone_update_init(&up, zone, UPDATE_INCREMENTAL | UPDATE_NO_CHSET);
if (ret != KNOT_EOK) {
return ret;
}
ret = knot_dnssec_zone_sign(&up, conf, sign_flags, r_flags, 0, &resch);
if (ret != KNOT_EOK) {
goto done;
}
zone_changed = !zone_update_no_change(&up);
ret = zone_update_commit(conf, &up);
if (ret != KNOT_EOK) {
goto done;
}
done:
// Schedule dependent events
event_dnssec_reschedule(conf, zone, &resch, zone_changed);
if (ret != KNOT_EOK) {
zone_update_clear(&up);
}
return ret;
}
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