Shell Programming and Scripting

Hi All,

please help me on how to secure my shell script?

I chnanged it to read-only mode using 'chmod'.

but still i would like to set password for open the script.

Is there any way? Please help me!!

Thankyou all in advance!!

What exactly do you mean by "open the script"?

Reading the script, or executing it?

see if crypt helps u.

If you are asking for some way to password-protect a shell script when it runs, then it requires a little more coding in....

You didn't specify which language you're using...but if this is a BASH script, here's a link that provides a method to do this at runtime, checking the password against a second file:

Prompting users for passwords in a shell script? :: Free Tech Support :: Ask Dave Taylor!

Of course you can modify the arguments to fit whatever language you are running it under....
This would of course only work if you disable most access to the password file you make. I wouldn't suggest putting the password explicitly in the file since you've given read access to it...

For the sake of thoroughness, if you do decide to block read access to the file, here's an example using md5sum to check the password. Please note I'm half awake at the moment, so there's more than likely some way to make this look a little more elegant, but this runs when I test it on my machine

Once again using bash:

#!/bin/bash

echo -n "Enter password: "
read -e VALUE

TEST=`echo -n $VALUE|md5sum`

pwdchk="5f4dcc3b5aa765d61d8327deb882cf99 -"

if [ "$TEST" = "$pwdchk" ]; then
echo "the program will run"
else
echo "The program will not run"
fi

I see that you have changed your script to read only so I assume that you do not mind if other users see the internals of your script.

Are you trying to prevent other users from changing the contents of your script? Or are you saying that you would like users to have to input a password before they can run your script?

Please clarify.

I think should be do not allow user to vi the file except the password is entered, but when excute the file no problem.

Thank you so much for all of your answers...

Well.. I would have make my requirement bit clear..

I have my script in a common folder.

I want to secure my script by viewing(as well as modifying) from other users.

Even though, I made it read only using 'chmod'. others may reset the mode using the same command..

So I would like to know from you all that is there any way to set a password and when ever 'vi filename' is prompted, it should ask a password to open..

Hope this may clear to you all..

if possible, kindly teach me is there any way to automate a script when ever the command 'vi filename' is prompted.

Thankyou all again!!