getx509certificate.sh

#!/bin/bash

if [ -z "$1" ] || [ -z "$2" ] 
then
	echo "Insufficient number of args"
	echo "$0 <ive_ip_address> <output_file>"
	exit
fi
echo Connecting to $1 port 443
openssl s_client -connect $1:443 < /dev/null 1>out.txt 2>err.txt
if [ "$?" -ne "0" ] 
then
	cat err.txt
	exit
fi
echo -n Generating Certificate
grep -in "\-----.*CERTIFICATE-----"  out.txt | cut -f 1 -d ":" 1> out1.txt
let start_line=`head -n 1 out1.txt`
let end_line=`tail -n 1 out1.txt`
if [ -z "$start_line" ]
then
	echo "error"
	exit
fi
let nof_lines=$end_line-$start_line+1
#echo "from $start_line to $end_line total lines $nof_lines"
echo -n " .... "
head -n $end_line out.txt | tail -n $nof_lines 1> out1.txt
openssl x509 -in out1.txt -outform der -out $2 
echo done.
rm out.txt out1.txt err.txt