fnv-hash-cracking

Crack hashes hashed with the FNV-1a algorithm without full brute force

CREDITS

Huge thank you to ConnorM for his incredible writeup and writing the original python proof of concept of which this is based off of. He does some incredible work with cryptography and his writeups are worth a read.

Requirements

This project requires the following libraries:
- mpfr
- gmp
- fplll

NOTE: This project uses the fplll library which does not support Windows. If you are looking to use this on Windows, look into WSL.

Usage

Run the following commands to get started

git clone https://github.com/Nico-Posada/fnv-hash-cracking.git
cd fnv-hash-cracking

If you do not have the fplll library installed, run the following:

Ubuntu and Debian

sudo apt install fplll-tools

or if you want to build it from source (will probably be better optimized for your machine), run the following

chmod +x scripts/setup.sh
sudo scripts/setup.sh

Conda

conda install fplll

MacOS

brew install fplll

More information on compilation and installation specifics can be found in the fplll repository.

To compile the test cases, run the following

make test

The binary will be output in the build/ directory.

To compile and run the test script, run the following

make run-test

To use in your own program, just copy over the src directory to your project directory and you can include it in your build script as normal. This uses header files only, so no need to make any object files beforehand.

TODO

• fplll has docker containers. Figure out how to make this work in them and provide steps.
• Clean up code, add more tests and actual test outputs.
• Add multithreading support back in.
• Maybe add a python module for this?
• Add support for setting the hash/prime/bit len dynamically to make this into a proper CLI
  • If this happens, maybe add JIT compilation for some speedup?
• Benchmarks