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|
#!/bin/bash
CONFIGFILE="/etc/default/dnscrypt-wrapper"
DAEMON="/usr/sbin/dnscrypt-wrapper"
. $CONFIGFILE
start_instance() {
if [ -z ${PIDFILE[$1]} ]; then
echo "No configuration for instance $1 found!"
return
fi
if [ -r ${PIDFILE[$1]} ]; then
PID=$(cat ${PIDFILE[$1]})
if [ -z "$PID" ] || ! kill -0 $PID ; then
echo "Removing stale PID file..."
rm -f ${PIDFILE[$1]}
else
echo "dnscrypt-wrapper (instance $1) already running!"
return
fi
fi
# dnscrypt-wrapper will NOT work without this. /dev/urandom is required in
# the chroot.
if [ -n "${CHROOTDIR[$1]}" ]; then
if [ "$(readlink -f ${CHROOTDIR[$1]})" != "/" ]; then
if [ ! -d ${CHROOTDIR[$1]} ]; then
mkdir -p ${CHROOTDIR[$1]}
chmod 755 ${CHROOTDIR[$1]}
fi
if [ ! -d ${CHROOTDIR[$1]}/dev ]; then
mkdir -p ${CHROOTDIR[$1]}/dev
chmod 755 ${CHROOTDIR[$1]}/dev
fi
if [ ! -c ${CHROOTDIR[$1]}/dev/urandom ]; then
mknod -m 666 ${CHROOTDIR[$1]}/dev/urandom c 1 9
fi
fi
fi
mkdir -p $(dirname ${PIDFILE[$1]})
# The child (unprivileged) process needs write access or the PID will not
# be written.
chmod 0700 $(dirname ${PIDFILE[$1]})
chown ${USER[$1]} $(dirname ${PIDFILE[$1]})
OPTIONS="-d"
if [ -n "${LISTENADDRESS[$1]}" ]; then
OPTIONS="${OPTIONS} --listen-address=${LISTENADDRESS[$1]}"
fi
if [ -n "${PIDFILE[$1]}" ]; then
OPTIONS="${OPTIONS} --pidfile=${PIDFILE[$1]}"
fi
if [ -n "${USER[$1]}" ]; then
OPTIONS="${OPTIONS} --user=${USER[$1]}"
fi
if [ -n "${DNSCRYPTDIR[$1]}" ]; then
if [ -n "$2" ] && [ "$2" == "rotate" ]; then
OPTIONS="${OPTIONS} --crypt-secretkey-file=${DNSCRYPTDIR[$1]}/crypt_secret.key,${DNSCRYPTDIR[$1]}/crypt_secret.key_prev"
else
OPTIONS="${OPTIONS} --crypt-secretkey-file=${DNSCRYPTDIR[$1]}/crypt_secret.key"
fi
OPTIONS="${OPTIONS} --provider-publickey-file=${DNSCRYPTDIR[$1]}/public.key"
OPTIONS="${OPTIONS} --provider-secretkey-file=${DNSCRYPTDIR[$1]}/secret.key"
fi
if [ -z "${DNSCRYPTDIR[$1]}" ] && [ -n "${CRYPTSECRETKEYFILE[$1]}" ]; then
OPTIONS="${OPTIONS} --crypt-secretkey-file=${CRYPTSECRETKEYFILE[$1]}"
fi
if [ -z "${DNSCRYPTDIR[$1]}" ] && [ -n "${PROVIDERPUBLICKEYFILE[$1]}" ]; then
OPTIONS="${OPTIONS} --provider-publickey-file=${PROVIDERPUBLICKEYFILE[$1]}"
fi
if [ -z "${DNSCRYPTDIR[$1]}" ] && [ -n "${PROVIDERSECRETKEYFILE[$1]}" ]; then
OPTIONS="${OPTIONS} --provider-secretkey-file=${PROVIDERSECRETKEYFILE[$1]}"
fi
if [ -n "${RESOLVERADDRESS[$1]}" ]; then
OPTIONS="${OPTIONS} --resolver-address=${RESOLVERADDRESS[$1]}"
fi
if [ -n "${PROVIDERNAME[$1]}" ]; then
OPTIONS="${OPTIONS} --provider-name=${PROVIDERNAME[$1]}"
fi
if [ -n "${PROVIDERCERTFILE[$1]}" ]; then
if [ -n "$2" ] && [ "$2" == "rotate" ]; then
OPTIONS="${OPTIONS} --provider-cert-file=${PROVIDERCERTFILE[$1]},${PROVIDERCERTFILE[$1]}_prev"
else
OPTIONS="${OPTIONS} --provider-cert-file=${PROVIDERCERTFILE[$1]}"
fi
fi
if [ "${UNAUTHENTICATED[$1]}" == "yes" ]; then
OPTIONS="${OPTIONS} --unauthenticated"
fi
if [ -n "${LOGFILE[$1]}" ]; then
OPTIONS="${OPTIONS} --logfile=${LOGFILE[$1]}"
fi
$DAEMON $OPTIONS
}
stop_instance() {
if [ -z ${PIDFILE[$1]} ]; then
echo "No configuration for instance $1 found!"
return
fi
if [ ! -r ${PIDFILE[$1]} ]; then
echo "dnscrypt-wrapper (instance $1) is not running!"
return
fi
echo "Stopping dnscrypt-wrapper (instance $1)..."
kill $(cat ${PIDFILE[$1]})
rm -f ${PIDFILE[$1]}
}
status_instance() {
if [ -z ${PIDFILE[$1]} ]; then
echo "No configuration for instance $1 found!"
return
fi
if [ ! -r ${PIDFILE[$1]} ]; then
echo "dnscrypt-wrapper (instance $1) is not running."
return
fi
PID=$(cat ${PIDFILE[$1]})
if [ -z "$PID" ]; then
echo "PID file is empty! dnscrypt-wrapper (instance $1) does not appear to be running, but there is a stale PID file."
elif kill -0 $PID ; then
echo "dnscrypt-wrapper (instance $1) is running."
else
echo "dnscrypt-wrapper (instance $1) is not running, but there is a stale PID file."
fi
}
generate-keys_instance() {
if [ -z ${PIDFILE[$1]} ]; then
echo "No configuration for instance $1 found!"
return
fi
if [ -z ${DNSCRYPTDIR[$1]} ]; then
echo "DNSCRYPTDIR not set for instance $1! Either set DNSCRYPTDIR or generate keys manually."
return
fi
OPTIONS=""
if [ "${NOLOG[$1]}" == "yes" ]; then
OPTIONS="${OPTIONS} --nolog"
fi
if [ "${DNSSEC[$1]}" == "yes" ]; then
OPTIONS="${OPTIONS} --dnssec"
fi
(
echo "Generating keys for instance $1. You should record the fingerprint, since this will be used by clients."
cd ${DNSCRYPTDIR[$1]}
rm -f public.key secret.key
$DAEMON $OPTIONS --gen-provider-keypair \
--provider-name=${PROVIDERNAME[$1]} \
--ext-address=${EXTADDRESS[$1]}
chmod 0600 public.key secret.key
)
}
generate-cryptkeys_instance() {
if [ -z ${PIDFILE[$1]} ]; then
echo "No configuration for instance $1 found!"
return
fi
if [ -z ${DNSCRYPTDIR[$1]} ]; then
echo "DNSCRYPTDIR not set for instance $1! Either set DNSCRYPTDIR or generate keys manually."
return
fi
(
echo "Generating cryptkeys for instance $1."
cd ${DNSCRYPTDIR[$1]}
rm -f crypt_secret.key
$DAEMON --gen-crypt-keypair
chmod 0600 crypt_secret.key
)
}
generate-cert_instance() {
if [ -z ${PIDFILE[$1]} ]; then
echo "No configuration for instance $1 found!"
return
fi
if [ -z ${PROVIDERCERTFILE[$1]} ]; then
echo "PROVIDERCERTFILE for instance $1 not set! Set PROVIDERCERTFILE before generating a certificate."
return
fi
OPTIONS=""
if [ -n "${DNSCRYPTDIR[$1]}" ]; then
OPTIONS="${OPTIONS} --crypt-secretkey-file=${DNSCRYPTDIR[$1]}/crypt_secret.key"
OPTIONS="${OPTIONS} --provider-publickey-file=${DNSCRYPTDIR[$1]}/public.key"
OPTIONS="${OPTIONS} --provider-secretkey-file=${DNSCRYPTDIR[$1]}/secret.key"
fi
if [ -z "${DNSCRYPTDIR[$1]}" ] && [ -n "${CRYPTSECRETKEYFILE[$1]}" ]; then
OPTIONS="${OPTIONS} --crypt-secretkey-file=${CRYPTSECRETKEYFILE[$1]}"
fi
if [ -z "${DNSCRYPTDIR[$1]}" ] && [ -n "${PROVIDERPUBLICKEYFILE[$1]}" ]; then
OPTIONS="${OPTIONS} --provider-publickey-file=${PROVIDERPUBLICKEYFILE[$1]}"
fi
if [ -z "${DNSCRYPTDIR[$1]}" ] && [ -n "${PROVIDERSECRETKEYFILE[$1]}" ]; then
OPTIONS="${OPTIONS} --provider-secretkey-file=${PROVIDERSECRETKEYFILE[$1]}"
fi
if [ -n "${CERTEXPIRATION[$1]}" ]; then
OPTIONS="${OPTIONS} --cert-file-expire-days=${CERTEXPIRATION[$1]}"
fi
(
echo "Generating certificate for instance $1."
mkdir /tmp/dnscrypt-wrapper-$$
cd /tmp/dnscrypt-wrapper-$$
$DAEMON $OPTIONS --gen-cert-file
chmod 0600 dnscrypt.cert
mv -f dnscrypt.cert ${PROVIDERCERTFILE[$1]}
cd /
rmdir /tmp/dnscrypt-wrapper-$$
)
}
rotate-keys_instance() {
if [ -z ${PIDFILE[$1]} ]; then
echo "No configuration for instance $1 found!"
return
fi
if [ -z ${DNSCRYPTDIR[$1]} ]; then
echo "DNSCRYPTDIR not set for instance $1! Either set DNSCRYPTDIR or rotate keys manually."
return
fi
if [ -z ${PROVIDERCERTFILE[$1]} ]; then
echo "PROVIDERCERTFILE for instance $1 not set! Set PROVIDERCERTFILE before rotating keys."
return
fi
(
echo "Backing up existing keys for instance $1."
cd ${DNSCRYPTDIR[$1]}
cp -f crypt_secret.key crypt_secret.key_prev
cp -f ${PROVIDERCERTFILE[$1]} ${PROVIDERCERTFILE[$1]}_prev
chmod 0600 crypt_secret.key_prev ${PROVIDERCERTFILE[$1]}_prev
generate-cryptkeys_instance $1
generate-cert_instance $1
stop_instance $1
sleep 1
start_instance $1 "rotate"
)
}
start() {
for i in `/usr/bin/seq 0 $((${#PIDFILE[@]}-1))`
do
start_instance $i
done
}
stop() {
for i in `/usr/bin/seq 0 $((${#PIDFILE[@]}-1))`
do
stop_instance $i
done
}
status() {
for i in `/usr/bin/seq 0 $((${#PIDFILE[@]}-1))`
do
status_instance $i
done
}
generate-keys() {
for i in `/usr/bin/seq 0 $((${#PIDFILE[@]}-1))`
do
generate-keys_instance $i
done
}
generate-cryptkeys() {
for i in `/usr/bin/seq 0 $((${#PIDFILE[@]}-1))`
do
generate-cryptkeys_instance $i
done
}
generate-cert() {
for i in `/usr/bin/seq 0 $((${#PIDFILE[@]}-1))`
do
generate-cert_instance $i
done
}
rotate-keys() {
for i in `/usr/bin/seq 0 $((${#PIDFILE[@]}-1))`
do
rotate-keys_instance $i
done
}
case "$1" in
'start')
start
;;
'stop')
stop
;;
'restart')
stop
start
;;
'status')
status
;;
'generate-keys')
generate-keys
;;
'generate-cryptkeys')
generate-cryptkeys
;;
'generate-cert')
generate-cert
;;
'rotate-keys')
rotate-keys
;;
*_start)
INSTANCE=`echo $1 | /bin/cut -d '_' -f 1`
start_instance $INSTANCE
;;
*_stop)
INSTANCE=`echo $1 | /bin/cut -d '_' -f 1`
stop_instance $INSTANCE
;;
*_restart)
INSTANCE=`echo $1 | /bin/cut -d '_' -f 1`
stop_instance $INSTANCE
sleep 1
start_instance $INSTANCE
;;
*_status)
INSTANCE=`echo $1 | /bin/cut -d '_' -f 1`
status_instance $INSTANCE
;;
*_generate-keys)
INSTANCE=`echo $1 | /bin/cut -d '_' -f 1`
generate-keys_instance $INSTANCE
;;
*_generate-cryptkeys)
INSTANCE=`echo $1 | /bin/cut -d '_' -f 1`
generate-cryptkeys_instance $INSTANCE
;;
*_generate-cert)
INSTANCE=`echo $1 | /bin/cut -d '_' -f 1`
generate-cert_instance $INSTANCE
;;
*_rotate-keys)
INSTANCE=`echo $1 | /bin/cut -d '_' -f 1`
rotate-keys_instance $INSTANCE
;;
*)
echo "Usage: $0 {start|stop|restart|status|generate-keys|generate-cryptkeys|generate-cert|rotate-keys|#_start|#_stop|#_restart|#_status|#_generate-keys|#_generate-cryptkeys|#_generate-cert|#_rotate-keys}"
exit 1
;;
esac
|
