Track B (milestone 5 / §16 hardening):
- tests/hostile_network.rs: in-process UDP relay/shim between a test
client and a real dosh-server that can drop, reorder, and duplicate
datagrams, and rebind its upstream socket mid-session. Asserts:
session survives loss/reorder, duplicated/replayed Input is applied at
most once, stale packets after resume are ignored (not fatal), and a
client source-address change preserves the session.
- tests/parser_robustness.rs: deterministic randomized tests throwing
garbage at every reachable public parser (packet decode, from_body for
all protocol/native structs, authorized_keys, known_hosts, host-key
line, ssh-ed25519 blob, bootstrap, attach ticket); asserts none panic.
- fuzz/: standalone cargo-fuzz crate (own [workspace], non-default
member) with libfuzzer-sys harnesses for packet decode, from_body,
authorized_keys, known_hosts, handshake structs+verifiers, and attach
tickets. README documents the run command.
- .github/workflows/ci.yml: add fuzz-smoke job (nightly + cargo-fuzz,
short -max_total_time per target, tolerant if tooling unavailable);
existing fmt/test/build/bench steps unchanged.
cargo fmt --check and cargo test are green.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
DuProcess