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projects

I like doing recreational programming and just working on random things that interest me. Try recreational programming!

security and cryptography

  • c25519: Side-channel attack resistant Ed25519 implementation in C that also includes SHA-512. It focuses on practical performance with generally good results, while passing a broad set of test vectors.
  • newspeak: End-to-end encrypted chat in Rust implementing Signal's Post-Quantum Extended Diffie-Hellman and Double Ratchet. Built with tonic for gRPC, SQLite for storage, dalek primitives, and a ratatui terminal UI.
  • secp256k1: secp256k1 signing and verification implementation with Jacobian coordinates and Montgomery representation to reduce expensive operations. Includes deterministic RFC6979 nonces.
  • hkdf: Self-contained header-only HKDF implementation in C with SHA-256 and HMAC primitives included.
  • pqxdh: Go library for Post-Quantum Extended Diffie-Hellman and XEdDSA. Extends X3DH with ML-KEM to provide stronger resistance against future quantum adversaries.
  • merkle: Merkle tree implementations in Go and C using SHA-256, including generation and verification of inclusion proofs.
  • schnorr: Schnorr signatures implemented over secp256k1 curve in 100 lines of Python. Serves as an educational implementation without dependencies (related to math).
  • gocry: Proof-of-concept ransomware implementation for educational and security research purposes.

programming languages and parsing

  • kukka: Small and fast parser combinator library in Rust that uses static dispatch to avoid trait-object overhead. It's mature enough to write parsers for JSON and CSV in a few lines.
  • mc: A simplistic C compiler written in Go with lexical analysis, parsing, IR generation, and x64 assembly output. Stopped working on this after getting a macbook.

distributed systems and databases

  • haystack: Distributed file system inspired by Facebook's Haystack architecture. Uses a Raft-based directory cluster to map files to append-only volumes and coordinates replication across store servers.
  • distsql: Distributed consensus layer built on top of SQLite for coordinating state across nodes.
  • levelsql: Minimal SQL implementation that stores relational data as key-value pairs on LevelDB.

random / fun

  • dot: A tiny easy-to-use dotfile manager built using in Go in a few hundred lines.
  • hashvis: Small command line utility that generates unique ASCII art based on file contents written in C.