OTP Generator

Description

This project is a application that generates and retrieves one-time passwords (OTPs) using the TOTP (Time-based One-Time Password) algorithm. It includes functionality to generate a QR code for setting up the OTP in an authenticator app and to continuously display the current OTP.

Implementation

The implementation consists of the following components:

• main.py: The main script that contains two main functionalities:
  • generate_qr(): Generates a QR code for the OTP and saves it as otp_qr.jpg. The corresponding secret is saved in secret.txt.
  • get_otp(): Continuously displays the current OTP in 30-second intervals.
• Makefile: Automates the build and run processes for the application.

Requirements

• Python3
• pyotp library
• qrcode library

You can install the required libraries using:

pip3 install pyotp qrcode

Usage

1. The Makefile includes targets to simplify running the commands. In your terminal, type:

   make
   

2. To generate a QR code for setting up the OTP in an authenticator app, run:

   ./submission --generate-qr
   

3. To display the current OTP, run:

   ./submission --get-otp
   

Using a Virtual Environment

If you see the "error: externally-managed-environment" error, highly recommend to use a virtual environment.

1. Create a virtual environment using the following command:

   python3 -m venv venv
   

2. Activate the virtual environment:

   source venv/bin/activate (on macOS)
   
   venv\Scripts\activate (on Windows)
   

3. Install the required libraries:

   pip install pyotp qrcode
   

4. Follow the steps in the Usage section.

5. If you want to deactivate the virtual environment, run:

   deactivate
   

Example Output

• QR Code:

  

• Terminal Output: