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certidude/doc/50-certidude

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2017-07-13 14:36:52 +00:00
#!/bin/sh
# To paste, press Ctrl-D to finish: cat > /etc/hotplug.d/iface/50-certidude
# To test: ACTION=ifup INTERFACE=wan sh /etc/hotplug.d/iface/50-certidude
# TODO: renewal
[ $ACTION == "ifup" ] || exit 0
[ $INTERFACE == "wan" ] || exit 0
# TODO: iterate over all authorities
AUTHORITY=certidude.@authority[0]
URL=$(uci get $AUTHORITY.url)
GATEWAY=$(uci get $AUTHORITY.gateway)
COMMON_NAME=$(uci get $AUTHORITY.common_name)
if [ $? -ne 0 ]; then
COMMON_NAME=$(uci get system.@system[0].hostname)
fi
KEY_PATH=$(uci get $AUTHORITY.key_path)
KEY_TYPE=$(uci get $AUTHORITY.key_type)
KEY_LENGTH=$(uci get $AUTHORITY.key_length)
CERTIFICATE_PATH=$(uci get $AUTHORITY.certificate_path)
REQUEST_PATH=$(uci get $AUTHORITY.request_path)
AUTHORITY_PATH=$(uci get $AUTHORITY.authority_path)
RED_LED=/sys/class/leds/$(uci get $AUTHORITY.red_led)
GREEN_LED=/sys/class/leds/$(uci get $AUTHORITY.green_led)
NTP_SERVERS=$(uci get system.ntp.server)
logger -t certidude -s "Fetching time from NTP servers: $NTP_SERVERS"
ntpd -q -n -d -p $NTP_SERVERS
logger -t certidude -s "Time is now: $(date)"
# If certificate file is there assume everything's set up
if [ -f $CERTIFICATE_PATH ]; then
SERIAL=$(openssl x509 -in $CERTIFICATE_PATH -noout -serial | cut -d "=" -f 2 | tr [A-F] [a-f])
logger -t certidude -s "Certificate with serial $SERIAL already exists, attempting to bring up IPsec tunnel..."
ipsec up client-to-site
exit 0
fi
# Turn green off and red on
if [ -d $GREEN_LED ] && [ -d $RED_LED ]; then
echo timer > $GREEN_LED/trigger
echo 100 | tee $GREEN_LED/delay_*
echo none > $RED_LED/trigger
fi
#########################################
### Generate private key if necessary ###
#########################################
if [ ! -f $KEY_PATH ]; then
KEY_TEMP=$(mktemp -u)
logger -t certidude -s "Generating RSA key for IPsec..."
if [ -d $GREEN_LED ]; then
echo 250 | tee $GREEN_LED/delay_*
fi
openssl gen$KEY_TYPE -out $KEY_TEMP $KEY_LENGTH
chmod 0600 $KEY_TEMP
mv $KEY_TEMP $KEY_PATH
fi
############################
### Fetch CA certificate ###
############################
if [ ! -f $AUTHORITY_PATH ]; then
AUTHORITY_TEMP=$(mktemp -u)
logger -t certidude -s "Fetching CA certificate from $URL/api/certificate/"
curl -f -s $URL/api/certificate/ > $AUTHORITY_TEMP
if [ $? -ne 0 ]; then
logger -t certidude -s "Failed to receive CA certificate, server responded: $(cat $AUTHORITY_TEMP)"
if [ -d $GREEN_LED ] && [ -d $RED_LED ]; then
echo none > $GREEN_LED/trigger
echo timer > $RED_LED/trigger
echo 100 | tee $RED_LED/delay_*
fi
exit 10
fi
openssl x509 -in $AUTHORITY_TEMP -noout
if [ $? -ne 0 ]; then
logger -t certidude -s "Received invalid CA certificate"
if [ -d $GREEN_LED ] && [ -d $RED_LED ]; then
echo none > $GREEN_LED/trigger
echo timer > $RED_LED/trigger
echo 250 | tee $RED_LED/delay_*
fi
exit 11
fi
mv $AUTHORITY_TEMP $AUTHORITY_PATH
fi
logger -t certidude -s "CA certificate md5sum: $(md5sum -b $AUTHORITY_PATH)"
#####################################
### Generate request if necessary ###
#####################################
if [ ! -f $REQUEST_PATH ]; then
REQUEST_TEMP=$(mktemp -u)
openssl req -new -sha256 -key $KEY_PATH -out $REQUEST_TEMP -subj "/CN=$COMMON_NAME"
mv $REQUEST_TEMP $REQUEST_PATH
fi
logger -t certidude -s "Request md5sum is $(md5sum -b $REQUEST_PATH)"
# Wait for certificate
if [ -d $GREEN_LED ]; then
echo 500 | tee $GREEN_LED/delay_*
fi
CERTIFICATE_TEMP=$(mktemp -u)
curl -f -L \
-H "Content-Type: application/pkcs10" \
--data-binary @$REQUEST_PATH \
$URL/api/request/?autosign=true\&wait=yes > $CERTIFICATE_TEMP
# TODO: Loop until we get exitcode 0
# TODO: Use backoff time $((2\*X))
if [ $? -ne 0 ]; then
echo "Failed to fetch certificate"
if [ -d $GREEN_LED ] && [ -d $RED_LED ]; then
echo none > $GREEN_LED/trigger
echo timer > $RED_LED/trigger
echo 500 | tee $RED_LED/delay_*
fi
exit 21
fi
# Verify certificate
openssl verify -CAfile $AUTHORITY_PATH $CERTIFICATE_TEMP
if [ $? -ne 0 ]; then
logger -t certidude -s "Received bogus certificate!"
if [ -d $GREEN_LED ] && [ -d $RED_LED ]; then
echo none > $GREEN_LED/trigger
echo timer > $RED_LED/trigger
echo 1000 | tee $RED_LED/delay_*
fi
exit 22
fi
logger -t certidude -s "Certificate md5sum: $(md5sum -b $CERTIFICATE_TEMP)"
###################################
### Generate /etc/ipsec.secrets ###
###################################
SECRETS_TEMP=$(mktemp -u)
for filename in /etc/ipsec.d/private/*.pem; do
echo ": RSA $filename" >> $SECRETS_TEMP
done
uci commit
mv $SECRETS_TEMP /etc/ipsec.secrets
mv $IPSEC_TEMP /etc/ipsec.conf
mv $CERTIFICATE_TEMP $CERTIFICATE_PATH
# Enable services
/etc/init.d/ipsec enable
# Restart services
/etc/init.d/ipsec restart
sleep 2
ipsec up client-to-site