CircuitGraph LogicLocking

Implementations of various logic locks and attacks.

Overview

This library provides both locks and attacks on logic locks. Interfacing with circuits is performed using CircuitGraph.

Here's a simple example of locking a basic benchmark circuit. The circuit to lock must be input as a circuitgraph.Circuit. The locked circuits is returned as a circuitgraph.Circuit and the key is returned as a dictionary mapping key inputs to their correct logical values.

import circuitgraph as cg
from logiclocking import locks, write_key

c = cg.from_lib("c880")
num_keys = 32
cl, k = locks.xor_lock(c, num_keys)

cg.to_file(cl, "c880_locked.v")
write_key(k, "c880_locked_key.txt")

The documentation can be found here.

Installing

Logiclocking is not yet available on PyPi, so you must install locally.

cd <install location>
git clone https://github.com/cmu-actl/logiclocking.git
cd logiclocking
pip install -e .

To run the miter attack or use check_for_difference, you must install python-sat

pip install python-sat

If you would like to use the Decision Tree Attack, you must also install sklearn.

pip install scikit-learn

Contributing

Tests are run using the builtin unittest framework. Some basic linting is performed using flake8.

pip instsall flake8
make test

Code should be formatted using black. Pre-commit is used to automatically run black on commit.

pip install black pre-commit
pre-commit install

Pre-commit also runs a few other hooks, including a docstring formatter and linter. Docs follow the numpy documentation convention.