🔐 CryptoToolkit

A full-featured cryptography desktop application built in Python

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📌 About

CryptoToolkit is a graphical desktop application that lets you encrypt, decrypt, encode, decode, and hash text using 10 industry-standard cryptographic algorithms — all in one clean dark-themed interface.

Built as a cryptography course project, it covers everything from symmetric block ciphers to asymmetric RSA, encoding schemes, and secure password hashing.

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✨ Features

🔒 Symmetric Encryption

Algorithm	Modes Supported
AES	ECB · CBC · CFB · OFB · CTR · GCM
DES	ECB · CBC · CFB · OFB · CTR
3DES	ECB · CBC · CFB · OFB · CTR

🔑 Asymmetric Encryption

Algorithm	Key Sizes
RSA	1024-bit · 2048-bit

📦 Encoding & Decoding

• Base64 — encode / decode binary data as ASCII text
• Hex — encode / decode bytes as hexadecimal digits
• URL Encoding — percent-encode / decode (RFC 3986, supports Arabic & Unicode)

#️⃣ Hashing

• SHA-256 — 256-bit one-way digest
• SHA-512 — 512-bit one-way digest
• Salted Hash — SHA-256 with a random 16-byte salt (timing-safe verification)

🛡️ Password Security Center

• Live strength scoring (0–100) with improvement tips
• Brute-force crack time estimator
• Breach database check via rockyou.txt
• Secure password generator with configurable rules

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🖥️ Screenshots

Home — Password Analyzer	Crypto Toolkit — AES

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🚀 Getting Started

Requirements

• Python 3.10+
• cryptography library

Installation

# 1. Clone the repository
git clone https://github.com/azmygg/CryptoToolkit.git
cd CryptoToolkit

# 2. Install the only dependency
pip install cryptography

# 3. Run the application
python crypto_gui.py

Optional

Place rockyou.txt in the project folder to enable the breach database check on the Home page.

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📁 Project Structure

CryptoToolkit/
│
├── code
    ├── crypto_lib.py       # Cryptographic backend — all algorithms & tools
    ├── crypto_gui.py       # Tkinter GUI — two-tab desktop application
├── README.md
└── screenshots/        # (optional) app screenshots

File Responsibilities

File	Role
crypto_lib.py	All crypto logic: AES, DES, 3DES, RSA, Base64, Hex, URL, SHA-256, SHA-512, Salted Hash, Password Generator
crypto_gui.py	GUI only — imports from crypto_lib.py, zero crypto logic of its own

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🧠 How It Works

Symmetric Encryption (AES / DES / 3DES)

• User provides a hex key (or clicks Gen Key for a random one)
• Selects a cipher mode — IV is shown/hidden automatically depending on the mode
• Input text is encrypted → output is a Base64 string
• The same key + IV is needed to decrypt

Asymmetric Encryption (RSA)

• Click Generate Key Pair → public and private keys appear as hex strings
• Copy and save both keys
• Encrypt with the public key → decrypt with the private key
• Uses OAEP + SHA-256 padding (stronger than PKCS#1 v1.5)

Hashing

• One-way — the Decrypt button is hidden for hash algorithms
• Salted Hash generates a fresh 16-byte random salt on every call
• Verification uses hmac.compare_digest() for constant-time comparison

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🔧 Tech Stack

Layer	Technology
Language	Python 3.10+
GUI	Tkinter (built-in)
Crypto	cryptography library (OpenSSL backed)
Randomness	secrets module (CSPRNG)
Hashing	hashlib (SHA-256 / SHA-512)

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📄 License

This project is licensed under the MIT License — feel free to use, modify, and distribute it.

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