Awesome

Fuzzers for EIP1962

This repo contains preset scripts for fuzzing of Rust implementation, fuzzing gas estimator (those are not too interesting), and differential testing between C++ implementation and Rust implementation. All scripts are Rust files, so C++ is wrapper into the thin layer.

Implementations

• Rust
• C++

Libfuzzer

Requires:

• C++17 compiler
• Nightly Rust
• Install using manual

Usage:

• cd fuzz
• bash run_fuzz_compare.sh

Honggfuzz

Requires:

• C++17 compiler
• Stable Rust
• Install using manual

Usage:

• cd honggfuzz
• bash run_honggfuzz_compare.sh

Tuning

• Change number of threads for fuzzers in scripts
• Download initial corpus from here and follow the instructions of either here or here

Recommendations and updates

• Honggfuzz is recommended for speed
• Now Honggfuzz saves all results instead of unique ones. Due to differential testing being implemented as "panic on different results" fuzzer considered different reasons as one crash case.
• run cargo update before running to fetch latest copies from github

Extra

Folder cross-tester contains few examples how to specify inputs from fuzzer reports debug and compare implementations.