Fuzz testing

This folder contains utilities to carry out fuzz testing. Currently only Honggfuzz is supported. Heavily inspired by the fuzz testing setup of rust-lightning.

Running

Generate the fuzzing code:

pushd src/bin
./gen_msgs_fuzz.sh
popd
HFUZZ_RUN_ARGS="--exit_upon_crash" cargo hfuzz run offerdlc_fuzz

(replace with whichever target you want to fuzz)

A docker image is provided to run honggfuzz on it. To build it, from the repository root directory run:

docker build . -f fuzz/Dockerfile -t dlcfuzz

You can then use it to fuzz as follow:

docker run --rm -it dlcfuzz offerdlc_fuzz

(replacing with whichever target you want to fuzz)

You can alter the hongfuzz arguments using the HFUZZ_RUN_ARGS environment variable, e.g.:

docker run --rm -it -e HFUZZ_RUN_ARGS='--exit_upon_crash -t 10' dlcfuzz offerdlc_fuzz