A Python-based Password Analyzer

Description:

This tool evaluates the strength of passwords using advanced metrics such as entropy, length, and complexity. It is designed to provide actionable feedback, suggest improvements, and identify vulnerabilities such as common patterns or dictionary-based words. Whether for personal use or enterprise security enhancements, this analyzer ensures a comprehensive assessment of password strength.

Features:

• Entropy Calculation
  Measures the randomness of passwords to ensure they are hard to guess or crack.

• Length and Complexity Checks
  Evaluates password length and ensures inclusion of uppercase letters, lowercase letters, numbers, and special characters.

• Pattern Detection
  Identifies common patterns, such as sequences or keyboard adjacency, that weaken security.

• Dictionary Attack Analysis
  Flags passwords containing dictionary words or predictable combinations.

• Feedback and Suggestions
  Provides detailed feedback on detected weaknesses and offers actionable suggestions for stronger passwords.

• Customizable Rules
  Allows users to define custom strength criteria tailored to their specific needs.

• Enterprise-Ready
  Ideal for integration into organizational systems to enforce password policies.

Requirements:

1. System Requirements

   • Python 3.7 or later
   • Compatible with Windows, macOS, and Linux

2. Python Libraries

   • numpy (for entropy calculations)
   • re (for regex-based pattern detection)
   • argparse (for command-line integration)
   • json or yaml (for custom configuration files)

Instructions:

Installation

1. Clone the repository:

   bash

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   git clone https://github.com/username/password-analyzer.git cd password-analyzer

2. Install required dependencies:

   bash

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   pip install -r requirements.txt

Usage

1. Command-Line Mode
   Analyze a password directly from the terminal:

   bash

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   python analyzer.py --password "YourPassword123!"

   Example Output:

   vbnet

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   Strength: Weak Issues: - Contains common patterns. - Low entropy (28 bits). Suggestions: - Use a longer password with more special characters.

2. Batch Mode
   Analyze passwords from a file:

   bash

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   python analyzer.py --file passwords.txt

3. Custom Configuration
   Use a custom rules file (e.g., rules.json):

   bash

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   python analyzer.py --config rules.json

Testing

Run the built-in test cases to ensure the analyzer is functioning correctly:

bash

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python -m unittest tests/test_analyzer.py