Bundle AWS Certificate to JKS

aws-jks.sh

#!/usr/bin/env bash
#
# Download bundle certificates to import it in JKS
# 
# source: AWS Documentation
# https://docs.aws.amazon.com/documentdb/latest/developerguide/connect_programmatically.html#connect_programmatically-tls_enabled

mydir=/tmp/certs
truststore=${mydir}/rds-truststore.jks
storepassword=<CHANGE-ME>

curl -sS "https://truststore.pki.rds.amazonaws.com/global/global-bundle.pem" > ${mydir}/global-bundle.pem
awk 'split_after == 1 {n++;split_after=0} /-----END CERTIFICATE-----/ {split_after=1}{print > "rds-ca-" n ".pem"}' < ${mydir}/rds-combined-ca-bundle.pem

for CERT in rds-ca-*; do
  alias=$(openssl x509 -noout -text -in $CERT | perl -ne 'next unless /Subject:/; s/.*(CN=|CN = )//; print')
  echo "Importing $alias"
  keytool -import -file ${CERT} -alias "${alias}" -storepass ${storepassword} -keystore ${truststore} -noprompt
  rm $CERT
done

rm ${mydir}/global-bundle.pem

echo "Trust store content is: "

keytool -list -v -keystore "$truststore" -storepass ${storepassword} | grep Alias | cut -d " " -f3- | while read alias
do
   expiry=`keytool -list -v -keystore "$truststore" -storepass ${storepassword} -alias "${alias}" | grep Valid | perl -ne 'if(/until: (.*?)\n/) { print "$1\n"; }'`
   echo " Certificate ${alias} expires in '$expiry'"
done