Encrypt and decrypt the password in a Shell Script

Shell Programming and Scripting
1

Hello,

I have the following UNIX shell script which connects to the teradata database and executes the SQL Queries. For this, I am passing database name, username and password. I don't want to reveal my password to anyone. So, is there any way that I can encrypt my password and read the password while executing the script. How can I achieve this?

#!/bin/sh
a="temp.btq"
> $a
echo ".LOGON DEV/p2123,password">>$a

Any help is really appreciated. Thanks in advance.

2

To the best of my knowledge there is no robust way to encrypt/decrypt password in shell scripts. However you can try the below 4 approaches.

  1. keep the username/password in a config file in some safe place and change the permission of that file and extract the credentials to use in your script.
  2. Pass the username,password,DB name as command line arguments. $1 $2 $3
  3. install the crypt package
    4 The best method is to find the equivalent of " Oracle wallet manager" for Teradata which will keep the credentials secret forever.
3

Thanks for the reply.

Can you please help me out with the 1st approach.