Script Kerberos Ktutil to make keytabs

Question

I want to make a script that will generate the a keytab using ktutil. When running the script I want to use [user]$ script.sh PASSWORD

#script.sh
echo "addent -password -p PRINCIPAL -k 1 -e aes256-cts-hmac-sha1-96" | ktutil

Ktutil than needs a password, here I want to use the PASSWORD argument from above. How would I pass the password arguement?

Answer 1

With GNU bash:

user="PRINCIPAL"
pass="topsecret"

printf "%b" "addent -password -p $user -k 1 -e aes256-cts-hmac-sha1-96\n$pass\nwrite_kt $user.keytab" | ktutil

printf "%b" "read_kt $user.keytab\nlist" | ktutil

Output:

slot KVNO Principal
---- ---- ---------------------------------------------------------------------
   1    1                          PRINCIPAL@YOURDOMAIN

Answer 2

To create the multiple orgs keytabs and default hbase,pipe,hdfs keytab at the same time you can run the below script, which i have just created:

#!/bin/bash
read -p "Please enter space-delimited list of ORGS to create: " NEW_ORGS

clear
#echo "#################  CREATE KEYTABS  ############################"
#echo ""
kdestroy

for i in $NEW_ORGS
do
     printf "%b" "addent -password -p ${i} -k 1 -e aes256-cts-hmac-sha1-96\n${i}\nwrite_kt ${i}.keytab" | ktutil

     printf "%b" "read_kt ${i}.keytab\nlist" | ktutil

done
echo ""


if [ ! -e /home/eip/.keytabs/hbase.keytab ]
then
        printf "%b" "addent -password -p hbase -k 1 -e aes256-cts-hmac-sha1-96\nhbase\nwrite_kt hbase.keytab" | ktutil

        printf "%b" "read_kt hbase.keytab\nlist" | ktutil
fi

exit 0