EAC Logchecker

This is a transparent implementation of the Exact Audio Copy log checksum algorithm in Python 3.4+.

This is a fork of https://github.com/puddly/eac_logsigner, with modifications to have it better match the output of the actual EAC Logchecker to be used in downstream applications.

Requirements

• Python 3.5+

Installation

From PyPI:

$ pip install eac-logchecker

From source:

$ git clone https://github.com/OPSnet/eac_logchecker.py
$ cd eac_logchecker.py
$ python setup.py install

Usage

usage: eac_logchecker [-h] [--json] files [files ...]

Verifies and resigns EAC logs

positional arguments:
files       input log file(s)

optional arguments:
-h, --help  show this help message and exit
--json      Output as JSON

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.