Password Strength Checker

A simple Node.js package to check the strength of a password based on various criteria including length, character types, and common password checks.

Features

• Checks password length (more than 9 characters)
• Verifies the presence of:
  • Uppercase letters
  • Lowercase letters
  • Numbers
  • Special characters (e.g., !@#$%^&*)
• Checks against a list of common passwords to warn users about weak passwords.

Installation

You can install this package via npm:

npm install password-strength-checker

Usage

Import the module in your Node.js application: const checkPasswordStrength = require('password-strength-checker');

Call the function with the password you want to check: console.log(checkPasswordStrength('P@ssw0rd123')); // Output: Strong

Password Strength Ratings

Weak: Password doesn't meet the minimum criteria.

Moderate: Meets some criteria but not all.

Strong: Meets most of the criteria.

Very Strong: Meets all criteria, including checking against common passwords.

Very Weak (Common Password): The password is a known weak or common password (e.g., 123456, password).

Common Password List

The following passwords are considered weak and are checked against the list:

123456, password, 123456789, 12345678, 12345

1234567, qwerty, abc123, password1, 123123

admin, letmein, welcome, monkey, football

Contributing

Contributions are welcome! If you'd like to improve this project, please follow these steps:

1. Fork the repository and create your branch (git checkout -b feature-name).
2. Make your changes and ensure that the code works correctly.
3. Commit your changes (git commit -am 'Add new feature').
4. Push to your branch (git push origin feature-name).
5. Open a pull request with a description of what you've done.

Please ensure your code follows the existing style and that tests pass before submitting a pull request. If you're reporting a bug or suggesting a feature, please include as much detail as possible.

License

This project is licensed under the MIT License - see the LICENSE file for details.