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fix: run libsodium on WebAssembly under the extension CSP (closes #182 )

libsodium ships a WASM build and a wasm2js translation in one file, tries
WASM first, and silently falls back if instantiation throws. Under a plain
script-src 'self' the fallback was taken on every popup load, announced by
nothing but an uncaught CompileError.

Measured on the vault's own Argon2id parameters (OPSLIMIT_INTERACTIVE,
MEMLIMIT_INTERACTIVE), node 22: WASM 141-198ms per derivation, wasm2js
3204-3660ms. The work factor is identical either way — it is set by the
ops and memory parameters, not by wall time — so the fallback bought no
security and cost about 3.5s on every operation that asks for the
password, which is every signature.

Both manifests now declare script-src 'self' 'wasm-unsafe-eval';
object-src 'self' for extension pages: an object under
content_security_policy.extension_pages for Chrome MV3, a bare string for
Firefox MV2. The keyword permits compiling WebAssembly and nothing else —
not eval() of strings, not inline script, not remote script — and reaching
it requires already executing script in an extension page. 'unsafe-eval'
is not granted.

The silence is what made this dangerous, so the fallback is now loud at
three levels: tests/manifest.test.js pins both policies to exactly that
token set, failing make check if the grant is dropped or if anything is
added beside it; tests/vaultBackend.test.js asserts the unit tests
exercise the WASM backend, with a self-validating check that libsodium
never swapped its fallback in; and the e2e suite compiles a WebAssembly
module inside the real popup under the real manifest, with the harness
allowlist entry that used to excuse the CompileError now deleted.

The runtime fallback itself is kept — a wallet that refuses to decrypt is
worse than a slow one — but vault.js now reports the backend and logs an
error when it is not WASM.

2026-08-11 12:42:55 +00:00

6.7 KiB

Raw Blame History

Workflow

git pull next and cut a branch from it — one branch per issue, named issue-<N>-<slug>. Never branch from main.
Do the work as one commit whose title ends with (closes #N), with the TODO.md update in that same commit.
Move Next Step to the top of Completed Steps; move the top item of Future Steps into Next Step.
Run make fmt, then make check. A feature branch may be red; next and main may not.
Rebase onto current next immediately before pushing — other branches land on next continuously — and re-run make check after resolving, because a clean textual merge can still break the build.
Push the branch and open one PR per issue with base next. Never base main.
An independent reviewer who did not write the change gates the merge. On a passed review the PR is squash-merged into next.
next is the branch for the next milestone. It is kept green and mergeable to main at any moment, without notice.
main receives exactly one PR per milestone, from next. Releases are tagged from main.

Status

pre-1.0, working towards the 1.0.0 milestone. Tagged v0.1.0 on 2026-02-27. The milestone is in flight on next; its next -> main PR is #190. make check verified green on next at e9fa8be on 2026-08-10, and make build produces dist/chrome/ and dist/firefox/ with every bundle verified to have DEBUG compiled off.

The backlog lives on the Gitea tracker, which is authoritative; this file does not duplicate it. Full policy file set present. A real-browser end-to-end suite (make test-e2e) now sits alongside make check, which cannot see a runtime ReferenceError in a popup view.

Next Step

Land #152: add ESLint to script/lint. make check is prettier --check only today and cannot catch undefined identifiers, which is how #150 and #151 shipped.

Completed Steps

2026-08-11: libsodium runs on WebAssembly in the shipped builds — 'wasm-unsafe-eval' added to both manifest CSPs after measuring the wasm2js fallback at 20x the Argon2id cost, pinned in both directions by tests/manifest.test.js and observed in the real popup by the e2e suite (#182).
2026-08-11: Three README.md claims corrected against the code — blocklist attribution, token-display rule, navigation model (#213).
2026-08-11: README Screen Map rebuilt from the code — every screen, element and transition re-verified against src/popup/ (#164).
2026-08-11: docs/README.md rewritten against the code: no competitor names, all five network destinations documented, password/Settings/Add Wallet sections corrected (#163).
2026-08-11: Wallet deletion repairs its own state — hasWallet follows the remaining wallets, the selection only moves when it was deleted, and the active-address change is broadcast to connected sites (#156).
2026-08-11: TODO.md Workflow rewritten to the branch-and-PR-per-issue model on next, with Status and Next Step refreshed (#191).
2026-08-09: DEBUG became a build-time constant defaulting to off, injected as the __BUILD_DEBUG__ esbuild define and turned on with AUTISTMASK_DEBUG=1, so a plain make build no longer hands every newly created wallet the publicly committed test recovery phrase (#149).
2026-08-09: dApp approval signing moved into the popup — the password no longer crosses the extension messaging boundary; the background broadcasts and resolves approvals only, and verifies the signed artifact against the approval it holds (#157).
2026-08-09: Post-build assertion that every emitted bundle containing constants.js has DEBUG compiled off, via script/verify-build on the make build path (#170).
2026-08-09: Containerized Chrome end-to-end harness (make test-e2e / script/test-e2e) driving the real popup with all network intercepted, plus the two used-but-not-imported crashes it caught: AddToken unreachable (#150) and TransactionDetail broken for every ERC-20 transfer (#151). Harness demonstrated failing before the fixes and passing after (#181). Interception covers the MV3 background service worker, not just the popup page, and a launch-time canary aborts the suite if worker traffic starts escaping.
2026-08-09: Reviewed the repo end to end and filed the 1.0.0 backlog (#149-#168).
2026-08-09: Test coverage for the address-poisoning defense in src/shared/transactions.js (#160)
2026-07-26: About well in settings with build info, repo link and the version click easter egg (#145); proper view navigation stack (#146).
2026-07-07 Adopted scripts-to-rule-them-all: script/ entrypoints, Makefile shims, README Entrypoints section (#148)
2026-03-01: USD display suppressed on testnets (#142); estimated USD for ETH in approve-tx view (#141).
Sepolia testnet support (#137); etherscan links go to token-specific URLs (#136).
Transaction detail improvements: Type field and on-chain details (#130), txid-first reordering (#133), swap display corrections (#128), expanded confirm-tx warnings (#118).
Dark mode theme setting (Light/Dark/System) with contrast fixes (#126); timestamps include timezone offset (#120); layout shift audit, reserved space for error messages (#124).
Copy-flash visual feedback with timing tune (#113, #121); cross-wallet-type duplicate detection (#115).
2026-02-27: v0.1.0 tagged.
2026-02-24: Initial scaffolding: popup UI, BIP-39 wallet creation via ethers.js, wallet persistence, real ETH balances over RPC, ENS forward and reverse resolution.

Future Steps

Only work that has no issue of its own belongs here; everything else is on the tracker.

Pre-1.0 security review of the extension (key handling, DEBUG mode policy, RPC input validation) before any 1.0rc tag. Individual filed issues are parts of it, but the review is broader than any of them.
Decide whether docker-in-docker makes make test-e2e runnable in the Gitea workflow. Extending the suite itself is tracked as #183 and #184.
Cut 1.0.0 once the milestone is empty, then continue tagging as milestones land.