xorfiles

A command-line utility to XOR two files. Useful for certain types of CTF challenge.

Usage

./xorfiles FILE1 FILE2

Features

XOR two files: xorfiles FILE1 FILE2
XOR one file with stdin: xorfiles FILE1 < FILE2
High throughput compared to Python and Ruby implementations

Installation

From Github

git clone https://github.com/sciguy16/xorfiles cargo build --release cargo run --release -- -h

From Crates.io

cargo install xorfiles

Roadmap/Todo

Optionally loop the shorter file (like a multi-byte XOR)
Limit the number of bytes read/written
Output to file
Hexdump on the input and output stages
Benchmark against C implementations
Optimise the Ruby and Python benchmarks further for better competition

Benchmarks

Benchmarks run with a 1 GB file XORed with itself, generated with dd if=/dev/zero of=big_file bs=1M count=1000. The Rust version was tested in two operating modes: XOR two files together and one file with stdin.

The following command was used to measure the throughput: <implementation> big_file big_file | pv > /dev/null