Extract and update a ldap certificate in a java keystore (jenkins)

update_keystore_ldap.sh

#!/bin/bash

LDAP_SERVER=example.com:636
ALIAS=LDAP_SERVER
KEYSTORE=/usr/lib/jvm/java-1.6.0-openjdk-amd64/jre/lib/security/cacerts
PASSWD=changeit

# grep the certificate
echo -n | openssl s_client -connect $LDAP_SERVER | sed -ne '/-BEGIN CERTIFICATE-/,/-END CERTIFICATE-/p' > ldaps.crt

# remove the old cert
keytool -delete -alias $ALIAS -keystore $KEYSTORE -storepass $PASSWD

# install the new cert
keytool -import -trustcacerts -alias $ALIAS -file ldaps.crt -keystore $KEYSTORE -storepass $PASSWD