EAC Log Signer

This is a transparent implementation of the Exact Audio Copy log checksum algorithm in Python 3.6+. Includes an option to fix those pesky edited logs.

Usage

usage: eac.py [-h] (--verify | --sign) FILE

Verifies and resigns EAC logs

positional arguments:
  FILE        path to the log file

optional arguments:
  -h, --help  show this help message and exit
  --verify    verify a log
  --sign      sign or fix an existing log

Overview

The algorithm internally uses UTF-16 strings and XORs a refilling 32-byte buffer of characters with the internal state of what looks to be part of AES-256. The code is pretty short, go read it for more info. Open a pull request if you can figure out a way to simplify it.