Password Analysis For React

password-analysis is a password strength analyzer library for React that evaluates password strength based on various metrics such as length, character diversity, and commonness. It provides a score and description of password strength to help users create secure passwords.

Features

• Length check: Stronger passwords are longer.
• Character diversity: Considers the use of uppercase, lowercase, numbers, and special characters.
• Common password check: Flags common or weak passwords that are easy to guess.
• Score system: Generates a score to categorize the strength of the password.

Installation

You can install the library via npm or yarn:

npm install password-analysis

or

yarn add password-analysis

Usage

Import the analyzePassword function

import { analyzePassword } from 'password-analysis';

Example of password analysis

import { analyzePassword } from 'password-analysis';

const password = "P@ssw0rd1234!";
const result = analyzePassword(password);

console.log(result);

Result Format The analyzePassword function returns an object with the following structure:

{
    "score": 58,
    "strength": "medium",
    "metrics": {
        "length": 13,
        "uniqueChars": 12,
        "hasUpperCase": true,
        "hasLowerCase": true,
        "hasNumbers": true,
        "hasSpecialChars": true,
        "isCommon": false
    }
}

Score Description

Score (0-70): The strength of the password, with 70 being the strongest.

• 0-20: Weak password.
• 21-50: Medium strength password.
• 51-70: Strong password.
• 70: Very strong password.

How is the score calculated?

The score is based on the following factors:

1. Length (0–20 points): Passwords are stronger when they are longer.
2. Unique Characters (0–10 points): More unique characters increase the score.
3. Uppercase Letters (0–10 points): Presence of uppercase letters increases the score.
4. Lowercase Letters (0–10 points): Presence of lowercase letters increases the score.
5. Numbers (0–10 points): Inclusion of numbers increases the score.
6. Special Characters (0–15 points): Passwords with special characters (e.g., !@#) increase the score significantly.
7. Common Passwords (penalty): Passwords found in common password lists are penalized.

Example Results

1. Weak Password:

   const password = "123456";
   const result = analyzePassword(password);
   console.log(result);

Output:

{
    "score": 10,
    "strength": "weak",
    "metrics": {
        "length": 6,
        "uniqueChars": 3,
        "hasUpperCase": false,
        "hasLowerCase": false,
        "hasNumbers": true,
        "hasSpecialChars": false,
        "isCommon": true
    }
}

• Score: 10 (Weak password)

• Strength: Weak

• Medium Strength Password:

  const password = "P@ssw0rd1234!";
  const result = analyzePassword(password);
  console.log(result);

Output:

{
    "score": 58,
    "strength": "medium",
    "metrics": {
        "length": 13,
        "uniqueChars": 12,
        "hasUpperCase": true,
        "hasLowerCase": true,
        "hasNumbers": true,
        "hasSpecialChars": true,
        "isCommon": false
    }
}

• Score: 58 (Medium strength)

• Strength: Medium

• Strong Password:

  const password = "A@z9d3Qr!lP0sXy7";
  const result = analyzePassword(password);
  console.log(result);

Output:

{
    "score": 70,
    "strength": "strong",
    "metrics": {
        "length": 18,
        "uniqueChars": 18,
        "hasUpperCase": true,
        "hasLowerCase": true,
        "hasNumbers": true,
        "hasSpecialChars": true,
        "isCommon": false
    }
}

• Score: 70 (Strong password)
• Strength: Strong

API

analyzePassword(password: string): AnalysisResult

Parameters:

• password (string): The password to analyze.

Returns:

• An object of type AnalysisResult containing:
  • score (number): The password score (0-70).
  • strength (string): The strength of the password (weak, medium, strong).
  • metrics (object):
    • length (number): Length of the password.
    • uniqueChars (number): Number of unique characters.
    • hasUpperCase (boolean): Whether the password contains uppercase letters.
    • hasLowerCase (boolean): Whether the password contains lowercase letters.
    • hasNumbers (boolean): Whether the password contains numbers.
    • hasSpecialChars (boolean): Whether the password contains special characters.
    • isCommon (boolean): Whether the password is common.

License

MIT