commit 29c0bb65a32df589083d166a765acac85bd8cf8d parent 4d26276282d02d96496062bde274882deaea8a83 Author: Joris Hartog <jorishartog@hotmail.com> Date: Wed, 19 Aug 2026 19:36:17 +0200 Add fuzzing plan and harnesses Diffstat:
21 files changed, 1491 insertions(+), 0 deletions(-)
diff --git a/.gitignore b/.gitignore @@ -1,4 +1,6 @@ /target +/fuzz/target +/fuzz/artifacts /.docker-build /.iuna /src-tauri/target diff --git a/Cargo.toml b/Cargo.toml @@ -20,6 +20,9 @@ sha2 = "0.10.9" rusqlite = { version = "0.32.1", features = ["bundled"] } tokio = { version = "1.45.1", features = ["full"] } +[features] +fuzzing = [] + [dev-dependencies] proptest = "1.6.0" tempfile = "3.20.0" diff --git a/PLAN.md b/PLAN.md @@ -0,0 +1,139 @@ +# Mainnet-Candidate Attack Testing Plan + +This plan tracks the remaining security and economics testing work before the +candidate chain is treated as promotable to mainnet. + +## 1. Fuzzing Harnesses + +Goal: continuously throw malformed and semi-valid input at every external data +boundary and every compact persistence format. + +Initial targets: + +- P2P gossip envelopes and item-limit validation. +- Compact chain snapshot decoder. +- Transaction, block, burn bundle, and chain snapshot JSON decoding. +- Stratum JSON requests and line framing. +- Wallet/config persistence decoding. + +Acceptance: + +- Fuzz targets live in the repo and can be run locally. +- Seed corpora include valid examples for every public message family. +- Crashes, panics, unbounded allocation, and excessive parser time are failures. +- Release candidates run at least a short fuzz smoke test; longer fuzzing can run + on a dedicated machine. + +## 2. Independent Mini-Validator + +Goal: compare the production validator against a small, deliberately separate +oracle for consensus-critical facts. + +Scope: + +- block size and transaction count limits; +- supply accounting; +- ticket maturity, expiry, and consumption; +- burn committee membership and quorum; +- fork-choice finality constraints. + +Acceptance: + +- Generated chains are accepted by both implementations. +- Mutated invalid blocks are rejected by both implementations for the same class + of reason. + +## 3. Economic Sweep Runner + +Goal: quantify whether attacks are impossible, only possible under network +isolation, or possible but expensive. + +Sweep dimensions: + +- attacker burn weight; +- attacker matured lineage weight; +- peer isolation percentage; +- gossip latency; +- offline finalizer rate; +- fee pressure and blockspace fill. + +Metrics: + +- attacker finalization share; +- attacker committee share; +- third-party burn censorship rate; +- cost per censored burn; +- fallback and recovery rate; +- attacker net reward or loss. + +## 4. Performance Budgets + +Goal: make valid input DoS visible before launch. + +Budgets: + +- max-size block validation; +- max mempool block selection; +- max burn bundle processing; +- snapshot import/export; +- P2P batch parsing; +- Stratum request handling. + +Acceptance: + +- Tests assert upper bounds on item counts and bytes. +- Benchmark or timing tests produce repeatable local numbers that can be tracked + before release. + +## 5. Eclipse And Partition Chaos + +Goal: ensure isolated or stale nodes reject bad histories and recover cleanly. + +Scenarios: + +- stale node receives old snapshots and invalid late blocks; +- attacker-only peers feed a minority fork; +- burn bundles are delayed across partitions; +- reconnect after recovery/fallback events. + +Acceptance: + +- invalid chains are not adopted; +- valid longer/better chains inside finality are adopted; +- old nodes catch up without manual database deletion. + +## 6. Crash Consistency + +Goal: prove local persistence survives process death at bad moments. + +Scenarios: + +- crash during block apply; +- crash during chain snapshot save; +- crash during wallet/config write; +- restart after partial UI index update; +- restart after local reset request. + +Acceptance: + +- node either resumes the last committed chain or reports a clear corruption + error without silently replacing valid state. + +## 7. Candidate Promotion Rehearsal + +Goal: prove candidate-to-mainnet promotion preserves coins. + +Scenario: + +- run a candidate chain; +- mine and transfer coins; +- upgrade to a release that fences peers with `iuna-mainnet-v1`; +- keep the same chain database and launch profile; +- continue mining from the existing tip. + +Acceptance: + +- genesis hash is unchanged; +- UTXOs and tickets are unchanged before the first promoted block; +- old candidate peers are rejected by network ID; +- upgraded nodes continue from the same chain tip. diff --git a/fuzz/Cargo.lock b/fuzz/Cargo.lock @@ -0,0 +1,1204 @@ +# This file is automatically @generated by Cargo. +# It is not intended for manual editing. +version = 4 + +[[package]] +name = "aead" +version = "0.5.2" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "d122413f284cf2d62fb1b7db97e02edb8cda96d769b16e443a4f6195e35662b0" +dependencies = [ + "crypto-common", + "generic-array", +] + +[[package]] +name = "ahash" 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"fuzz_targets/p2p_envelope.rs" +test = false +doc = false + +[[bin]] +name = "compact_snapshot" +path = "fuzz_targets/compact_snapshot.rs" +test = false +doc = false + +[[bin]] +name = "domain_json" +path = "fuzz_targets/domain_json.rs" +test = false +doc = false + +[[bin]] +name = "stratum_request" +path = "fuzz_targets/stratum_request.rs" +test = false +doc = false diff --git a/fuzz/README.md b/fuzz/README.md @@ -0,0 +1,30 @@ +# iuna Fuzz Targets + +These targets exercise external input boundaries and persistence decoders. + +Install `cargo-fuzz` once: + +```sh +cargo install cargo-fuzz +``` + +Run a target: + +```sh +cargo fuzz run p2p_envelope +cargo fuzz run compact_snapshot +cargo fuzz run domain_json +cargo fuzz run stratum_request +``` + +Short smoke run without installing `cargo-fuzz`: + +```sh +cargo run --manifest-path fuzz/Cargo.toml --bin p2p_envelope -- -runs=1 fuzz/corpus/p2p_envelope +cargo run --manifest-path fuzz/Cargo.toml --bin compact_snapshot -- -runs=1 fuzz/corpus/compact_snapshot +cargo run --manifest-path fuzz/Cargo.toml --bin domain_json -- -runs=1 fuzz/corpus/domain_json +cargo run --manifest-path fuzz/Cargo.toml --bin stratum_request -- -runs=1 fuzz/corpus/stratum_request +``` + +Targets intentionally accept malformed input. A parse error is fine; panics, +crashes, excessive allocation, or timeouts are failures. diff --git a/fuzz/corpus/compact_snapshot/newline.bin b/fuzz/corpus/compact_snapshot/newline.bin @@ -0,0 +1 @@ + diff --git a/fuzz/corpus/domain_json/block.json b/fuzz/corpus/domain_json/block.json @@ -0,0 +1 @@ +{"height":1,"prev_hash":"0000000000000000000000000000000000000000000000000000000000000000","timestamp_ms":1,"miner":"1111111111111111111111111111111111111111111111111111111111111111","finalizer_mode":"ticket","finalizer_rank":0,"reward":0,"vdf_rounds":1,"vdf_output":"out","leader_proof":null,"burn_bundle_section":{"signatures":[],"burns":[]},"transactions":[],"hash":"2222222222222222222222222222222222222222222222222222222222222222"} diff --git a/fuzz/corpus/domain_json/transfer.json b/fuzz/corpus/domain_json/transfer.json @@ -0,0 +1 @@ +{"kind":"transfer","inputs":[{"outpoint":{"txid":"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa","index":0},"owner":"bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb","signature":"cccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccc"}],"outputs":[{"address":"dddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddd","amount":1}],"fee":1,"signature":"eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee"} diff --git a/fuzz/corpus/p2p_envelope/hello.json b/fuzz/corpus/p2p_envelope/hello.json @@ -0,0 +1 @@ +{"type":"hello","protocol_version":1,"network_id":"iuna-mainnet-candidate-v1","genesis_hash":"0000000000000000000000000000000000000000000000000000000000000000","listen_addr":null,"node_id":null,"height":0,"tip_hash":"0000000000000000000000000000000000000000000000000000000000000000","time_ms":0} diff --git a/fuzz/corpus/p2p_envelope/inventory.json b/fuzz/corpus/p2p_envelope/inventory.json @@ -0,0 +1 @@ +{"type":"inventory","blocks":[{"height":1,"hash":"1111111111111111111111111111111111111111111111111111111111111111"}]} diff --git a/fuzz/corpus/p2p_envelope/transactions.json b/fuzz/corpus/p2p_envelope/transactions.json @@ -0,0 +1 @@ +{"type":"transactions","transactions":[]} diff --git a/fuzz/corpus/stratum_request/authorize.json b/fuzz/corpus/stratum_request/authorize.json @@ -0,0 +1 @@ +{"id":2,"method":"mining.authorize","params":["ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff","x"]} diff --git a/fuzz/corpus/stratum_request/subscribe.json b/fuzz/corpus/stratum_request/subscribe.json @@ -0,0 +1 @@ +{"id":1,"method":"mining.subscribe","params":[]} diff --git a/fuzz/fuzz_targets/compact_snapshot.rs b/fuzz/fuzz_targets/compact_snapshot.rs @@ -0,0 +1,7 @@ +#![no_main] + +use libfuzzer_sys::fuzz_target; + +fuzz_target!(|data: &[u8]| { + let _ = iuna::adapters::chain_store::fuzz_decode_compact_snapshot(data); +}); diff --git a/fuzz/fuzz_targets/domain_json.rs b/fuzz/fuzz_targets/domain_json.rs @@ -0,0 +1,25 @@ +#![no_main] + +use iuna::{ + app::GossipEnvelope, + domain::{Block, BurnBundle, ChainSnapshot, Transaction}, +}; +use libfuzzer_sys::fuzz_target; + +fuzz_target!(|data: &[u8]| { + if data.len() > 2 * 1024 * 1024 { + return; + } + let Ok(line) = std::str::from_utf8(data) else { + return; + }; + + let _ = serde_json::from_str::<Transaction>(line); + let _ = serde_json::from_str::<BurnBundle>(line); + let _ = serde_json::from_str::<Block>(line).map(|block| { + let _ = block.serialized_size_bytes(); + let _ = block.compute_hash(); + }); + let _ = serde_json::from_str::<ChainSnapshot>(line); + let _ = serde_json::from_str::<GossipEnvelope>(line); +}); diff --git a/fuzz/fuzz_targets/p2p_envelope.rs b/fuzz/fuzz_targets/p2p_envelope.rs @@ -0,0 +1,9 @@ +#![no_main] + +use libfuzzer_sys::fuzz_target; + +fuzz_target!(|data: &[u8]| { + if let Ok(line) = std::str::from_utf8(data) { + let _ = iuna::adapters::p2p::fuzz_parse_envelope(line); + } +}); diff --git a/fuzz/fuzz_targets/stratum_request.rs b/fuzz/fuzz_targets/stratum_request.rs @@ -0,0 +1,9 @@ +#![no_main] + +use libfuzzer_sys::fuzz_target; + +fuzz_target!(|data: &[u8]| { + if let Ok(line) = std::str::from_utf8(data) { + let _ = iuna::adapters::stratum::fuzz_parse_stratum_request(line); + } +}); diff --git a/src/adapters/chain_store.rs b/src/adapters/chain_store.rs @@ -12,6 +12,11 @@ use crate::domain::ChainSnapshot; mod compact; use compact::{decode_compact_snapshot, encode_compact_snapshot}; +#[cfg(feature = "fuzzing")] +pub fn fuzz_decode_compact_snapshot(bytes: &[u8]) -> Result<ChainSnapshot> { + decode_compact_snapshot(bytes) +} + const SCHEMA: &str = r#" CREATE TABLE IF NOT EXISTS chain_snapshots ( id INTEGER PRIMARY KEY CHECK (id = 1), diff --git a/src/adapters/p2p.rs b/src/adapters/p2p.rs @@ -87,6 +87,11 @@ const INITIAL_RECONNECT_DELAY: Duration = Duration::from_secs(1); const MAX_RECONNECT_DELAY: Duration = Duration::from_secs(30); type OutboundBatch = Vec<GossipEnvelope>; +#[cfg(feature = "fuzzing")] +pub fn fuzz_parse_envelope(line: &str) -> anyhow::Result<GossipEnvelope> { + parse_envelope(line) +} + #[derive(Clone)] pub struct GossipNetwork { inner: Arc<GossipNetworkInner>, diff --git a/src/adapters/stratum.rs b/src/adapters/stratum.rs @@ -28,6 +28,14 @@ const STRATUM_MAX_JOBS_PER_SESSION: usize = 128; const STRATUM_MAX_SESSIONS: usize = 64; const STRATUM_IDLE_TIMEOUT: Duration = Duration::from_secs(120); +#[cfg(feature = "fuzzing")] +pub fn fuzz_parse_stratum_request(line: &str) -> Result<Value> { + if line.len() > STRATUM_MAX_LINE_BYTES { + bail!("Stratum request exceeds {STRATUM_MAX_LINE_BYTES} byte limit"); + } + serde_json::from_str(line).context("invalid Stratum JSON") +} + #[derive(Clone)] pub struct StratumServer { node: SharedNode,