logos-blockchain/lez-fuzzing
1
0
Fork 0
mirror of https://github.com/logos-blockchain/lez-fuzzing.git synced 2026-06-07 03:29:26 +00:00
Code Issues Packages Projects Releases Wiki Activity

fix: improve detection of malformed input

Browse Source
This commit is contained in:
Roman 2026-05-13 10:43:40 +08:00
parent 3370a39417
commit 1641775dd8
No known key found for this signature in database
GPG Key ID: 583BDF43C238B83E
1 changed files with 15 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

20
fuzz/fuzz_targets/fuzz_encoding_roundtrip.rs
View File

@ -4,9 +4,14 @@
//! Invariants exercised:
//!
//! 1. **Encode/decode stability** — `encode(decode(encode(tx))) == encode(tx)`.
//! 2. **Canonical encoding** — if raw fuzzer bytes decode successfully, re-encoding must
//! 2. **No-panic on adversarial bytes** — `from_bytes(raw_fuzz_data)` must never panic,
//! whether it returns `Ok` or `Err`. (Tests 3 & 4.)
//! 3. **Canonical encoding** — if raw fuzzer bytes decode successfully, re-encoding must
//! reproduce those exact bytes (`encode(decode(data)) == data`). This catches non-canonical
//! encodings that are accepted by the decoder but silently normalised on the way out.
//! Because `borsh::from_slice` (used by `from_bytes`) consumes *all* bytes and errors on
//! trailing data, `Ok` implies every input byte was semantically meaningful, and the output
//! must be identical. (Tests 3 & 4, `Ok` branch.)
//!
//! `PrivacyPreservingTransaction` is excluded because its ZK receipt cannot be
//! reconstructed in a fuzzing loop.
@ -47,8 +52,11 @@ fuzz_target!(|data: &[u8]| {
);
}
// ── Test 3: Canonical encoding — raw bytes that decode must re-encode identically ──
if let Ok(tx) = PublicTransaction::from_bytes(data) {
// ── Test 3: No-panic decode + canonical encoding (PublicTransaction) ─────────────
// Invariant 2: from_bytes must never panic on any input — Ok or Err both valid, no panic.
// Invariant 3: on Ok, re-encoding must reproduce the original bytes exactly.
let pub_raw_result = PublicTransaction::from_bytes(data); // ← no-panic check (invariant 2)
if let Ok(tx) = pub_raw_result {
let re_encoded = tx.to_bytes();
assert_eq!(
data,
@ -58,8 +66,10 @@ fuzz_target!(|data: &[u8]| {
);
}
// ── Test 4: Canonical encoding for ProgramDeploymentTransaction ──────────────────
if let Ok(tx) = ProgramDeploymentTransaction::from_bytes(data) {
// ── Test 4: No-panic decode + canonical encoding (ProgramDeploymentTransaction) ──
// Same two invariants as Test 3, applied to ProgramDeploymentTransaction.
let prog_raw_result = ProgramDeploymentTransaction::from_bytes(data); // ← no-panic check
if let Ok(tx) = prog_raw_result {
let re_encoded = tx.to_bytes();
assert_eq!(
data,