get the cert from a ssl connection for importing into a keystore

retrieve-cert.sh

#!/bin/sh
#
# usage: retrieve-cert.sh remote.host.name [port]
#

if [ $# -eq 0 -o $# -gt 2 ]; then
    echo `basename $0`" <host> <port:443>"
    exit
fi

REMHOST=$1
REMPORT=${2:-443}

echo |\
openssl s_client -connect ${REMHOST}:${REMPORT} 2>&1 |\
sed -ne '/-BEGIN CERTIFICATE-/,/-END CERTIFICATE-/p'