Shell Programming and Scripting

Hi,
I have written a shell script in unix for my customer. Now I want to make it only execute and not to read/write. Can anybody help me how to set password protect/encript my script.

Thanks
Suresh

using -x option.

Code:

vim -x file_name

When opening that file this will ask for encryption password.
Now you can set the encrypting password.

After setting the password when we are opening that file then it will ask for encrypted password.
If we given wrong password the original content will not be shown. It will show a crypt content until we are giving the correct password.

In vim

in command mode use the X command

Code:

:X

it will ask the encryption key,
then you need to give the encryption key.

using this you can set the password to your file.
it will allow to you read the file with the help of encryption key.


if you want to remove the encryption key use the same command

it will ask the encryption key no need to give the encryption key simply enter is enough to remove the encryption key
of change the encryption key.

if you encrypt your script then your script will not execute.

This question has been asked over and over and over and over again. Fact is: as long as the file has to be interpreted, it has to be readable by the interpreter, and by default is readable by the user running it. Even if you hid it inside a C program it would still be readable using the strings program. For ksh there's a tool called shcomp which "compiles" your script, but in reality it only converts it to a pre-parsed file, which can easily be de-parsed, eg. by running your script with the -x parameter.

If you really want to protect the algorithms you use, code it up in a high-level language, but even that can be de-compiled.