Script for identifying SSH keys without passphrase

ssh-test-passphrase.sh

#!/bin/bash

umask 077
if [ "XX$1" == "XX" ]
then
	echo "No file specified."
	exit 1
fi
if [ ! -e $1 ]
then
	echo "File not found: $1"
	exit 1
fi
KEYFILE=$1
TEMPFILE=$(mktemp)
cp $KEYFILE $TEMPFILE
ssh-keygen -p -P '' -N 123456789 -f $TEMPFILE >/dev/null 2>/dev/null
if [ $? -eq 0 ]
then
	echo "$KEYFILE - contains an unprotected OpenSSH key"
else
	echo "$KEYFILE - does not contain an unprotected OpenSSH key"	
fi
rm $TEMPFILE