project-aes 0.5.0

Warning: This implementation is intended for analysis and educational purpose and should not be used for real-world security.

About

• Author: shrimp2845
• Version: 0.5.0
• License: MIT

A pure Python implementation of the Advanced Encryption Standard (AES) algorithm with support for multiple key sizes, configurable internal transformations, detailed logging, and multiple cipher modes of operation.

Features

• AES-128/AES-192/AES-256 support
• ECB/CBC/CTR modes
• PKCS#7 padding
• Custom AES transformation configuration
• Custom S-Box support
• Encryption/decryption logging

Project Structure

project_AES/
  ├── __init__.py
  ├── block_utils.py
  ├── configs.py
  ├── project_AES.py
  └── aes_core/
      ├── __init__.py
      ├── cipher.py
      ├── core_utils.py
      ├── key_expansion.py
      ├── math_utils.py
      └── round.py

Installation

Requires Python 3.10+

pip install project-aes

or

pip install tqdm
git clone https://github.com/shrimp2845-tw/project_AES.git
cd project_AES

Quick Start

from project_AES import AES
key = b"0123456789abcdef"
plaintext = b"hello world"
cipher = AES(key)
ciphertext = cipher.encrypt(plaintext)
print(ciphertext)

Docs

class initialize
----------------------
from project_AES import AES
aes = AES(key, mode='ECB', config=None)

key -> bytes (16, 24 or 32 bytes)
Required. AES key for 128/192/256-bit encryption.
mode -> str (optional)
Block cipher mode of operation.
Supported: 'ECB', 'CBC', 'CTR'
Default: 'ECB'
config -> AESConfig (optional)
Advanced configuration. Default is AESConfig()


methods
----------------------
encrypt(data: bytes) -> bytes
decrypt(data: bytes) -> bytes
→ Encrypt/decrypt bytes data

encrypt_block(block: bytes) -> bytes
decrypt_block(block: bytes) -> bytes
→ single block (16 bytes) encryption/decryption

Examples

This project includes three example scripts demonstrating different functionalities of the module:

​1.File Cipher: A script for encrypting and decrypting files using AES with various operation modes (ECB, CBC, CTR).

​2.Avalanche Observation: A script to observe the avalanche effect by testing how bit-flips in plaintext affect the ciphertext under different configurations.

3.Differential: A script constructs Difference Distribution Tables (DDT) to analyze the cryptographic strength of the S-Box (both standard and user defined).

Samples

1.File Cipher:

You can try to decrypt these examples by your self

• hina.png -> encrypt(key=gehenna, mode=ECB) -> hina.bin

• kayoko.jpg -> encrypt(key=cat, mode=CBC) -> kayoko.bin

• r18.gif -> encrypt(key=give you up, mode=CTR) -> r18.bin

(I originally wanted to use a picture of Shiina Mahiru, but I couldn’t find any good images under a cc license QAQ)

2.Avalanche Observation:

Disclaimer

This implementation is intended for analysis and educational purposes only.
It does not guarantee cryptographic security or production-level performance efficiency.

Do not use this project in any environment that requires strong security assurances.

License

Source code: MIT License

Example assets: Some materials under /examples/test_files are used for demonstration purposes only and remain under their original license:

© SeriBaKa (https://www.deviantart.com/seribaka/art/Blue-archive-sorasaki-hina-905973822)

© らんどう(https://www.pixiv.net/artworks/116363500)

Thanks to the original creators 🤎