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certidude/doc/overlay/usr/bin/certidude-enroll

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#!/bin/sh
set -e
set -x
AUTHORITY=certidude.@authority[0]
# TODO: iterate over all authorities
GATEWAY=$(uci get $AUTHORITY.gateway)
COMMON_NAME=$(uci get system.@system[0].hostname)
DIR=/etc/certidude/authority/$(uci get $AUTHORITY.hostname)
mkdir -p $DIR
AUTHORITY_PATH=$DIR/ca_cert.pem
CERTIFICATE_PATH=$DIR/host_cert.pem
REQUEST_PATH=$DIR/host_req.pem
KEY_PATH=$DIR/host_key.pem
KEY_TYPE=$(uci get $AUTHORITY.key_type)
KEY_LENGTH=$(uci get $AUTHORITY.key_length)
KEY_CURVE=$(uci get $AUTHORITY.key_curve)
NTP_SERVERS=$(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 in $CERTIFICATE_PATH, attempting to bring up VPN tunnel..."
exit 0
fi
#########################################
### Generate private key if necessary ###
#########################################
if [ ! -f $KEY_PATH ]; then
case $KEY_TYPE in
rsa)
logger -t certidude -s "Generating $KEY_LENGTH-bit RSA key..."
openssl genrsa -out $KEY_PATH.part $KEY_LENGTH
openssl rsa -in $KEY_PATH.part -noout
;;
ec)
logger -t certidude -s "Generating $KEY_CURVE ECDSA key..."
openssl ecparam -name $KEY_CURVE -genkey -noout -out $KEY_PATH.part
;;
*)
logger -t certidude -s "Unsupported key type $KEY_TYPE"
exit 255
;;
esac
mv $KEY_PATH.part $KEY_PATH
fi
############################
### Fetch CA certificate ###
############################
if [ ! -f $AUTHORITY_PATH ]; then
logger -t certidude -s "Fetching CA certificate from $URL/api/certificate/"
curl -f -s http://$(uci get $AUTHORITY.hostname)/api/certificate/ -o $AUTHORITY_PATH.part
if [ $? -ne 0 ]; then
logger -t certidude -s "Failed to receive CA certificate, server responded: $(cat $AUTHORITY_PATH.part)"
exit 10
fi
openssl x509 -in $AUTHORITY_PATH.part -noout
if [ $? -ne 0 ]; then
logger -t certidude -s "Received invalid CA certificate"
exit 11
fi
mv $AUTHORITY_PATH.part $AUTHORITY_PATH
fi
logger -t certidude -s "CA certificate md5sum: $(md5sum -b $AUTHORITY_PATH)"
#####################################
### Generate request if necessary ###
#####################################
if [ ! -f $REQUEST_PATH ]; then
openssl req -new -sha256 -key $KEY_PATH -out $REQUEST_PATH.part -subj "/CN=$COMMON_NAME"
mv $REQUEST_PATH.part $REQUEST_PATH
fi
logger -t certidude -s "Request md5sum is $(md5sum -b $REQUEST_PATH)"
curl -f -L \
-H "Content-Type: application/pkcs10" \
--cacert $AUTHORITY_PATH \
--data-binary @$REQUEST_PATH \
https://$(uci get $AUTHORITY.hostname):8443/api/request/?autosign=true\&wait=yes -o $CERTIFICATE_PATH.part
# TODO: Loop until we get exitcode 0
# TODO: Use backoff time $((2\*X))
if [ $? -ne 0 ]; then
echo "Failed to fetch certificate"
exit 21
fi
# Verify certificate
openssl verify -CAfile $AUTHORITY_PATH $CERTIFICATE_PATH.part
if [ $? -ne 0 ]; then
logger -t certidude -s "Received bogus certificate!"
exit 22
fi
logger -t certidude -s "Certificate md5sum: $(md5sum -b $CERTIFICATE_PATH.part)"
uci commit
mv $CERTIFICATE_PATH.part $CERTIFICATE_PATH
# Start services
logger -t certidude -s "Starting IPSec IKEv2 daemon..."
/etc/init.d/ipsec enable
/etc/init.d/ipsec restart