How to create password protected script in python

Published: 31 May 2025
on channel: CodeLive

Download 1M+ code from https://codegive.com/5d25d5d
okay, let's dive into creating password-protected python scripts. this tutorial will cover various methods, from basic to more secure, with code examples and explanations.

*disclaimer:* no password protection method in python (or any scripting language) is truly "bulletproof" against determined attackers. python code is, at its core, text. if someone has direct access to the script's source code, they can always bypass the protection eventually. however, these techniques can deter casual unauthorized use and increase the effort required to access the script's functionality.

*1. basic password prompt using `getpass` (simplest method)*

this is the easiest method for adding a password check. it's suitable for situations where you just want to prevent casual access.

*explanation:*

1. *`import getpass`:* this module provides the `getpass()` function, which prompts the user for a password without echoing it to the screen.
2. *`hashlib`:* we use the `hashlib` module (specifically, `sha256`) to hash the password. never store passwords in plain text. hashing is a one-way function that transforms the password into an unreadable, fixed-size string (the hash).
3. *password storage (password.txt):* this script stores the password hash in a file named `password.txt`. this is done for simplicity, *but it is not highly secure*. in a real application, you'd use a proper database and consider salting the passwords (more on that later).
4. *`get_password_hash_from_file()`:* this function attempts to read the password hash from the `password.txt` file. if the file doesn't exist (first time running the script), it returns `none`.
5. *`set_password_hash_to_file()`:* this function hashes the user-entered password and writes the hash to the `password.txt` file.
6. *`prompt_password()`:*
it first tries to read the password hash from the file.
if no password exists (the hash file is missing), it prompts the user to set a new password and ...

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