Phase 2 of CODE_AUDIT §1.2 — live adoption of the Argon2id foundation.
Verified at runtime: a rotated account shows hash_algo=argon2id-v2 with
argon2_m=19456,t=2,p=1 in vault.db.
Server (never runs Argon2 — zero-knowledge, only stores/echoes params):
- DB: users.argon2_m/t/p columns (default 0 = PBKDF2).
- PM.Handler.Auth: HASH_ALGO_ARGON2 + param bounds, ReadArgon2Params /
AppendArgon2Params helpers. /register and /change-master-password accept
hashAlgo='argon2id-v2' + argon2:{m,t,p} and persist them; /login/challenge
echoes them. Verify path (VerifierToStoredHash/CheckVerifier) is
KDF-agnostic — the 64-hex verifier is SHA256-wrapped as for any -v2 scheme.
Client (app.js):
- state.argon2Params, cached from the challenge and persisted to
sessionStorage + the quick-unlock / PIN cold-start blobs (so a cold-started
session can still derive-from-password for reauth/rotation).
- Register + master-pw rotation derive with argon2id-v2 + ARGON2_DEFAULT_PARAMS
(OWASP m=19MiB,t=2,p=1) and send the params. Rotation re-encrypts the whole
vault under the new Argon2 key (natural migration point). Existing accounts
stay PBKDF2 until they rotate.
- Params threaded through every derive-from-password site (login, reauth,
recovery setup, change-pw current verifier). Cold-start verifier-from-raw-key
paths need no params (isDecoupledVerifierAlgo handles the -v2 wrap).
Tests: +2 param-contract tests (register<->login determinism, param
sensitivity). 42/42. Assets rebuilt to embed js/argon2.js.
Docs: CLAUDE.md auth-hash section rewritten (4 markers); CODE_AUDIT §1.2 +
table + plan marked done.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Phase 1 of CODE_AUDIT §1.2 — additive, no live account uses Argon2id yet.
- Vendor @noble/hashes@2.2.0 argon2id as js/argon2.js (esbuild IIFE exposing
globalThis.NobleArgon2). Pure-JS, not WASM: CSP is script-src 'self' with no
wasm-unsafe-eval, so WASM would require weakening it. Verified against the
RFC 9106 §5.3 test vector. Server needs zero Argon2 (zero-knowledge: it only
ever SHA256-wraps the client verifier).
- app.js: deriveKeyBytes(pwd, salt, algo, iters, argonParams) branches Argon2id
vs PBKDF2; deriveKeyAndVerifier refactored around it. New markers
HASH_ALGO_ARGON2='argon2id-v2' + ARGON2_DEFAULT_PARAMS (OWASP m=19MiB,t=2,p=1,
~0.65s/unlock). isDecoupledVerifierAlgo() generalises the decoupled-verifier
rule to any '-v2' scheme so argon2id-v2 inherits it. AES key is still ALWAYS
the raw KDF output → entries decryptable, legacy accounts untouched.
- index.html loads js/argon2.js before app.js; added to BuildAssets whitelist;
test harness loads it into the sandbox first.
- Tests: +5 (RFC 9106 vector via vendored bundle, argon2 branch derives Argon2
key not PBKDF2, decoupled verifier, AES round-trip under Argon2 key). 40/40.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Two CODE_AUDIT items in one session.
§3.2 — Frontend regression net (js/tests/, 35 tests, node:test, zero deps):
- harness.js loads app.js (monofile, no exports) into a node:vm with browser
globals stubbed, surfacing internals via an export epilogue.
- crypto: deriveKeyAndVerifier (AES key == raw PBKDF2, cross-checked vs Node
pbkdf2Sync), legacy-vs-v2 verifier decoupling, encrypt/decrypt round-trip,
IV uniqueness, AEAD tamper/wrong-key.
- csv: parseCSV tokenizer, findColumn heuristics, Bitwarden/KeePass mapping.
- merge: applyRemoteSnapshot add/update/skip (LWW), tombstone delete,
resurrection arbitration (both NaN branches), local-tombstone veto,
additive folder merge. Only api() is stubbed; loadEntries/encryptImportEntry
run for real.
- Wired as a build gate in BuildAssets.ps1 (after node --check, bypass
PM_SKIP_TESTS=1).
§2.2 — Unify timestamps on UTC:
- Entry created_at/updated_at were written via Delphi FormatDateTime(Now)
= LOCAL, while deleted_at/tombstones use SQLite CURRENT_TIMESTAMP = UTC.
The tombstone-resurrection arbitration compared the two zones, skewing by
the machine's UTC offset even single-device.
- Add NowUTC/NowUTCStr to PM.Database, swap in at every entry/attachment
write site (Entries create/update/bulk, Attachments POST echo).
- No JS change needed: arbitration now compares same-zone values.
- Existing rows self-heal on next edit (no destructive migration).
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
r-zakarya