Fortress Password Generator Development by Hatim El HassakFortress Password Generator Development by Hatim El Hassak

Fortress Password Generator Development

Hatim El Hassak

Completed work

Vibe Coding

GitHub

Pytest

Python

Computer Software

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Completed work

Posted Feb 13, 2026

Developed a secure password generator using Python's secrets module.

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🏰 Fortress

A cryptographically secure password generator with entropy estimation.

Fortress uses Python's secrets module to generate passwords that are suitable for security-sensitive applications. It includes entropy calculation, strength estimation, and a beautiful CLI.

✨ Features

Feature Description 🔐 Cryptographically Secure Uses secrets module, not random 📊 Entropy Calculation Know exactly how strong your password is ⏱️ Crack Time Estimation See how long it would take to crack 🎨 Beautiful CLI Rich terminal output with colors and progress 📦 Zero Dependencies Core library has no dependencies 🔧 Configurable Customize character sets, length, and more 🧪 Well Tested 80%+ test coverage with pytest

🚀 Installation

# Install core library only
pip install fortress

# Install with CLI support (recommended)
pip install "fortress[cli]"

# Install for development
pip install -e ".[dev]"

📖 Usage

Command Line

# Generate a 16-character password (default)
fortress generate

# Generate a 32-character password
fortress generate -l 32

# Generate without symbols (for sites that don't allow them)
fortress generate --no-symbols

# Generate multiple passwords
fortress generate -c 5

# Generate a memorable passphrase
fortress passphrase

# Check strength of an existing password
fortress check "MyP@ssw0rd123"

# Quiet mode (just the password, for scripting)
fortress generate -q

Python Library

from fortress import generate_password, PasswordConfig, calculate_entropy

# Generate with defaults (16 chars, all character types)
password = generate_password()

# Generate with custom length
password = generate_password(length=32)

# Generate with custom configuration
config = PasswordConfig(
    length=24,
    use_symbols=False,
    exclude_ambiguous=True,  # No 0/O, 1/l/I confusion
)
password = generate_password(config=config)

# Check entropy
entropy = calculate_entropy(password)
print(f"Entropy: {entropy:.1f} bits")

📁 Project Structure

fortress/
├── __init__.py              # Public API
├── core/
│   ├── generator.py         # Password generation logic
│   └── entropy.py           # Strength calculation
├── cli/
│   └── __init__.py          # Typer CLI application
└── utils/
    └── display.py           # Terminal display utilities

🏗️ Architecture

Core Module: Pure Python, no dependencies, cryptographically secure

CLI Module: Optional, uses Typer and Rich for beautiful output

Utils Module: Display helpers with graceful fallback

🔒 Security

Fortress uses secrets.choice() instead of random.choice(). The secrets module is specifically designed for generating cryptographically strong random numbers suitable for managing secrets such as passwords.

From the Python docs:

The secrets module is used for generating cryptographically strong random numbers suitable for managing data such as passwords, account authentication, security tokens, and related secrets.

🧪 Development

# Clone and install
git clone https://github.com/hatimhtm/Fortress.git
cd Fortress
pip install -e ".[dev]"

# Run tests
pytest

# Run with coverage
pytest --cov=fortress --cov-report=html

# Lint
ruff check .

# Type check
mypy fortress

📊 Password Strength Guide

Entropy (bits) Strength Crack Time* < 28 Very Weak Instantly 28-35 Weak Minutes 36-59 Fair Hours to days 60-127 Strong Years ≥ 128 Very Strong Centuries

*Assuming 10 billion attempts/second

📄 License

MIT

👤 Author

Hatim El Hassak — Full-Stack Engineer