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Changelog

All notable changes to Vault are documented here. Dates are ISO 8601 UTC per the Spacecraft Software Standard §12. Vault is pre-1.0; versions in the 0.x range may break in any release.

[Unreleased]

Added

  • Live PQC handshake gate met (RELEASING.md gate #2). Added live_handshake_negotiates_x25519mlkem768, an #[ignore]d interop test that drives a real TLS 1.3 handshake with the pqc client config against Cloudflare's PQC host (pq.cloudflareresearch.com) and asserts the negotiated group is X25519MLKEM768 — confirming the hand-rolled hybrid wire layout interoperates with an independent server, not just our own halves. Run with cargo test -p vault-api --features pqc -- --ignored live_handshake (docs/pqc.md). Second of the v0.1 operational gates cleared; only the §11.2 two-week daily-driver attestation remains.

  • EncString fuzz soak passed (PRD §11.4 / RELEASING.md gate #1). A ≥ 24 h libFuzzer soak of the EncString type-2 parser completed with 0 findings: 8,874,210,317 executions over 86,401 s (~102.7 k exec/s), coverage flat at 312 blocks, exit 0, fuzz/artifacts/ empty. The verbatim run is captured in docs/fuzzing-report.md. First of the v0.1 operational gates cleared; the tag still waits on the live PQC handshake and the daily-driver attestation.

  • REUSE compliance (Standard §4.3) + CI gate. Added LICENSES/GPL-3.0-or-later.txt and a REUSE.toml (a path="**" annotation supplying copyright + license in bulk, mirroring construct/), so every file carries license + copyright info and reuse lint passes (77/77 files, GPL-3.0-or-later only). A new REUSE lint CI job enforces it. Satisfies the §5.2 posture requirement for a LICENSES/ directory.

  • justfile dev gates. Recipes mirroring CI exactly — just fmt / clippy (fresh-isolated -D warnings, the only form that matches the runner) / test / headless / version-gate / deny / audit, with just ci running the full set, plus just fuzz [secs] and just pqc. Encodes the commands from .github/workflows/ci.yml so they can't drift and are one keystroke.

  • RELEASING.md + v0.1 status reconcile. A maintainer checklist for cutting the v0.1.0 tag (operational gates → mechanical version bump / CHANGELOG date / signed tag), and PRD §11–§12 annotated with each criterion's status. Docs only — no version bump or tag yet (those wait on the operational gates).

  • Scrolling detail pane. The detail pane now scrolls to keep the focused field visible — the granular identity view is ~18 fields and could overflow a shorter terminal. Reuses the form's scroll_offset; only the detail-focused view scrolls (browsing is unchanged).

  • Granular identity field selectors. 16 new --field selectors expose every identity field individually — identity-{title,first-name,middle-name, last-name,username,company,ssn,passport,license,address1,address2,address3, city,state,postal,country} — alongside the existing composed identity-name / identity-address. vault get … --field identity-ssn now works, and the TUI identity detail pane shows the full granular set so per-field reveal/copy reaches every field (SSN/passport/license masked, revealed on demand like the card CVV). Same proto → agent → CLI → TUI shape as the card-* selectors.

  • TUI per-field reveal/copy in the detail pane. The detail pane is now focusable (Tab cycles folders → items → detail): with it focused, j/k move a field cursor and Space/c reveal/copy the selected field — so the card CVV (and any non-primary field) can finally be revealed and copied, not just the item's primary field. Masked fields (card number/CVV) still fetch only on reveal. Item-list Space/c keep hitting the primary field. Cards and identities get the field cursor; logins keep their c/u/o/t keys.

  • TUI form scrolling + full identity editing. The add/edit form overlay now scrolls (a viewport that keeps the focused row visible; the keybind footer stays fixed, with a ↕ cue when there's more). This retires the curated 10-field identity limit: the TUI identity form now edits the full 18-field set, including the SSN/passport/license secrets (masked while unfocused, like the card number/CVV; redacted in any Debug). Pure vault-tui — the IdentityWrite backend already carried all the fields.

  • card-cardholder field selector. vault get <card> --field card-cardholder now returns the cardholder name, and the TUI detail pane shows a Holder line — which also lets the TUI card edit form prefill the cardholder (it previously started blank, as there was no read selector). Closes the card edit-prefill gap from the card-write / TUI-card slices.

  • mlock the user keys (no swap exposure). The agent's unwrapped user keys (user_enc/user_mac) are now wrapped in a SealedKey newtype that boxes the bytes for a stable address and mlocks their page(s) so they can't be paged to a swap file, completing the agent memory-hygiene hardening (core dumps + ptrace already covered). Surgical (only the key pages, never the whole process → no RLIMIT_MEMLOCK/OOM risk) via the safe region crate, keeping #![forbid(unsafe_code)]; best-effort (a refused lock logs nothing and the key is still zeroized). SealedKey derefs to [u8; 32], so the encrypt/decrypt call sites are unchanged; it zeroizes while still locked, then unlocks, on drop.

  • Agent anti-leak hardening (core dumps + ptrace). On startup the agent now disables core dumps and marks itself non-dumpable (which also blocks same-user ptrace), so the in-memory user key / refresh token can't leak to a core file or a debugger. Done via the secmem-proc crate (audited rustix syscalls, keeps the agent's #![forbid(unsafe_code)]); best-effort — a sandbox that restricts setrlimit logs a warning and the agent keeps running. PRD §12 M7 hardening groundwork. (mlock/no-swap remains a tracked follow-up.)

  • Post-quantum transport (pqc feature, off by default). A GPL-clean hybrid X25519MLKEM768 key-exchange group is added to the rustls client config, so a TLS 1.3 handshake negotiates a post-quantum-secure secret when the server offers it (silent classical fallback otherwise). The classical half reuses ring's X25519; the PQ half is RustCrypto ml-kem (Apache-2.0/MIT) — not aws-lc-rs, whose OpenSSL-licensed AWS-LC is GPL-incompatible. Build with cargo build -p vault-agent --features pqc; see docs/pqc.md. Satisfies the PRD §12 M7 "PQC transport feature flag" item (vault-api/src/pqc.rs, client role only). Tests cover the ML-KEM client kx round-trip + the hybrid layout.

  • EncString parser fuzz harness. A cargo-fuzz / libFuzzer target (fuzz/fuzz_targets/enc_string_parse.rs) for the security-critical Bitwarden "type 2" parser — feeds arbitrary input to EncString::parse and asserts the parse → serialize → parse round-trip is stable. Lives in a standalone fuzz/ workspace (nightly + sanitizer only), so the CI gates are untouched; run with cargo +nightly fuzz run enc_string_parse (see docs/fuzzing.md). Groundwork toward the PRD §11.4 / M7 v0.1 gate (the ≥ 24 h soak is a maintainer step).

  • TUI identity create/edit (curated). The vault-tui add/edit form (a/e) now composes identity (type 4) items — the Type row cycles login → secure note → card → identity. To fit the non-scrolling overlay it edits a curated 10-field subset (title, first/last name, email, phone, address1, city, state, postal code, country); the long-tail fields and the SSN/passport/license secrets stay CLI-only. On edit, email/phone prefill from the detail pane (the composite Person/Address lines can't be split back, so those start blank = leave unchanged). Builds the existing IdentityWrite on Request::Add/Edit — no backend change. With this, all four cipher types are editable from both front-ends. Tests: identity add carries the curated fields, identity edit prefill/diff, 4-way type-toggle cycle.

  • Create/edit identity ciphers. vault add … --type identity and vault edit now build/update identity (type 4) items — the last cipher type to get a write path. The 15 non-secret fields (title, names, username, company, email, phone, address1–3, city, state, postal code, country) are flags; the three sensitive fields — SSN, passport, license — are prompted on the controlling terminal when their bool flag (--ssn/--passport/--license) is set (never argv). The identity username is --identity-username (the bare --username is the login field). Editing identity fields on a non-identity item is rejected.

    • vault-core: from_plain emits an Identity for type 4. vault-ipc: a typed IdentityWrite (ssn/passport/license as zeroized Vec<u8>, redacted Debug) on Request::Add/Edit (serde-defaulted). vault-agent: add_cipher builds a PlainIdentity; apply_cipher_edits sets only the given identity fields. Tests: from_plain→decrypt identity round-trip; apply_cipher_edits identity partial-update; IdentityWrite transport + Debug-redaction.
    • This unblocks identity TUI editing (the next follow-up) — the backend it needed now exists.

  • TUI card create/edit. The vault-tui add/edit form (a/e) now composes card (type 3) items, not just logins and secure notes. The Type row cycles login → secure note → card; the card rows are cardholder/brand/number/expiry (one MM/YYYY field, split on submit)/CVV, with number and CVV masked while unfocused. On edit, brand/expiry prefill from the detail pane's on-select fetch and secrets start blank (blank = leave unchanged). Builds the existing CardWrite payload on Request::Add/Edit — no backend change. Identity TUI editing stays pending (no identity write path yet). Tests: card add carries split expiry + redacts secrets, card edit prefill/diff, parse_expiry.

  • Create/edit card ciphers. vault add … --type card and vault edit now build/update card (type 3) items: cardholder/brand/expiry via flags, the number and CVV prompted on the controlling terminal (/dev/tty, never argv — so they don't leak to shell history / ps). --expiry takes MM/YYYY or MM/YY; on edit, --number/--code re-prompt those secrets. Editing card fields on a non-card item is rejected.

    • vault-core: from_plain emits a Card for type 3. vault-ipc: a typed CardWrite (secrets as zeroized Vec<u8>, redacted Debug) on Request::Add/Edit (serde-defaulted). vault-agent: add_cipher builds a PlainCard; apply_cipher_edits sets only the given card fields (others preserved).
    • Identity create/edit remains the tracked follow-up (read-only for now). Tests: from_plain→decrypt card round-trip; apply_cipher_edits card partial-update; CardWrite transport + Debug-redaction; CLI split_expiry.

  • TUI card/identity detail render. Selecting a card or identity in vault-tui now shows its fields in the detail pane: card brand/expiry with a masked number (Space reveals it, re-masked on navigation) and masked CVV; identity name/email/phone/address. c copies the primary field per type (card number / identity email / login password); Space reveals the primary secret (card number / login password). Non-sensitive fields are fetched on select via the existing Request::Get; the card number/CVV are fetched only on reveal — no card secret enters the TUI until asked. No proto/agent/core change (reuses the PR #23 Field selectors). This completes card/identity support end-to-end (CLI + TUI). Tests: primary_secret_field/primary_copy_field units + TestBackend renders for card (masked number, revealed) and identity.

  • Card & identity cipher types (read, CLI). vault-core now models card (type 3) and identity (type 4) ciphers — full field sets, decrypted into PlainCard/PlainIdentity (sensitive fields zeroized on drop) via new DecryptOptions { card, identity }. New Field selectors — card-number/card-brand/card-expiry/card-code and identity-name/identity-email/identity-phone/identity-address — make them readable: vault get <item> --field card-number. The agent composes the derived ones (card-expiry → MM/YYYY; identity-name/-address joined). Rendering them in the TUI detail pane is the next slice (the list path only carries name/username today). Tests: vault-core card/identity decrypt; vault-agent get_item card-number/expiry + NoSuchField; vault-ipc Field round-trip. No new deps.

  • Live TOTP codes from login ciphers. A login's stored totp field (an otpauth://totp/… URI or a bare base32 secret) now yields the current RFC 6238 code rather than the raw secret: vault get <item> --field totp prints it, and the TUI's new t key copies it. The code is generated in the agent, so the secret never crosses the socket. New vault-core::totp module (HOTP/dynamic-truncation, hand-rolled base32, otpauth parsing; SHA1 default + SHA256/SHA512) behind the one new dep sha1. RFC 6238 vector + base32 + parse unit tests; an agent test that Field::Totp returns a 6-digit code (not the secret). Field::Totp / FieldArg::Totp already existed — only the value changed and the t key was added.

  • Interactive TOTP two-factor auth. A 2FA-enabled account is no longer a dead end on the password grant: on Error::TwoFactorRequired, prompt for the authenticator code and resubmit the token grant with it.

    • vault-api: login_password gains two_factor: Option<&TwoFactor> and appends twoFactorToken/twoFactorProvider/twoFactorRemember; a wrong code re-challenges so the caller re-prompts.
    • vault-ipc: TwoFactorCode + serde-defaulted two_factor on Request::Unlock (forward-compatible). vault-agent threads it into the password grant (provider 0 = authenticator).
    • vault-cli: vault login/unlock resubmit on a challenge, reading the code from the controlling terminal (/dev/tty) so it works even with the password piped to stdin; --totp / $BW_TOTP supply it non- interactively. vault-tui: an "Authenticator code" step in the unlock screen (stashes the password, resubmits with the code).
    • Scope: the authenticator/TOTP provider only; other providers (email, Duo, WebAuthn) and "remember this device" are future work. An API key still bypasses 2FA entirely.
    • Tests: vault-api wiremock challenge→resubmit; vault-ipc transport round-trip; vault-tui begin_2fa/request-with-code units.

  • tui.vim — vim jump motions in the TUI. Opt-in (vault config set tui.vim true): on top of the default hjkl, the browser gains gg (top), G (bottom), and Ctrl-d/Ctrl-u (half-page; a fixed step — the pure-render App has no viewport height). Because g becomes the gg prefix in vim mode, the generator overlay moves from g to Ctrl-g; non-vim mode is unchanged (g opens the generator). Read by vault-tui directly (not relayed to the agent). New App motions (move_top/move_bottom/page_up/ page_down, reusing the focus-aware re-masking move_* pattern) + a gg prefix state machine. Completes the PRD §7.1 config registry. Tested in vault-config (round-trip / reject / not-an-agent-flag) and vault-tui (jump

    • clamp + empty-list no-op + the gg arm/take sequence).

  • ui.reduced_motion config key (reserved). Completes the PRD §7.1 config registry with the accessibility preference to suppress animated TUI elements. The TUI has no animations yet (it's fully event-driven — no spinner, no lock-countdown, no blink), so the key is inert groundwork: vault-config records/validates it and vault-tui populates an App.reduced_motion flag from it, ready for a future spinner / lock-countdown to honor without re-plumbing. It's a TUI-rendering preference, read by the TUI directly (not relayed to the agent). Tested in vault-config (round-trip, rejects non-booleans, never emitted as an agent flag).

  • TUI About overlay. vault-tui gains a read-only About screen (open with ? or :about, dismiss with Esc/q) showing the version, maintainer, copyright/license, and canonical URL — rendered from the same ATTRIBUTION/PKG_VERSION constants as vault-tui --version, so it can't drift. This was the last unfilled v0.1 success criterion that the Standard §13.2 block appears "in --version, --help, README, and the TUI About screen" (PRD §14). New InputMode::About + render_about (modeled on the generator overlay); a TestBackend test asserts the §13.2 content reaches the screen.

  • clipboard.backend selection. New config key choosing how the TUI's copy keys reach a clipboard: auto (default — native arboard, else the TUI falls back to OSC52), arboard (force native; warns if unavailable), or osc52 (the agent declines so the TUI copies through the terminal via an OSC52 escape — for SSH/tmux, so copies land on the local machine). The agent can't emit OSC52 itself (no terminal); osc52 just makes it step aside for the TUI's existing client-side path.

    • clipboard::BackendChoice + select() (wrapping the existing detect()); a --clipboard-backend flag (defined unconditionally so a headless agent accepts it as a no-op) flowing from the config like the other keys. vault status reports osc52 even with no native backend held.
    • Tests: vault-config validation/round-trip + agent_args emission; BackendChoice as_str/default, select(osc52) is None (CI-safe), and a Status test for the osc52-mode label.

  • Scheduled background sync. New sync.interval_secs config key: while unlocked, the agent re-pulls /sync on that cadence (a tokio interval task, server::scheduled_sync_loop), refreshing the in-memory vault and the encrypted on-disk cache so it never drifts from the server and an offline/PIN unlock later reads fresh data — no manual vault sync. 0/unset disables.

    • Reuses AgentState::resync wholesale; best-effort — a Locked / Offline / network result is logged and skipped. It deliberately does not touch(), so background syncs never defer the idle-lock countdown.
    • Flows config → auto-spawn flag (--sync-interval-secs) like idle_lock_secs; takes effect on the next agent spawn. last_sync (already in vault status) surfaces freshness — no protocol change.
    • Tests: vault-config get/set/unset + agent_args flag emission; an agent invariant test that a locked resync is a clean Locked no-op and doesn't move last_activity.

  • Session resume across agent restart (opt-in, Linux). With the new agent.session_keyring config key, an unlock mirrors the user key into the Linux kernel session keyring (kernel memory — never on disk, never swapped, possessor-gated, evicted on logout). A restarted agent (crash, SIGTERM, stop-agent + auto-spawn) reads it back and resumes unlocked without the master password, bounded by the idle-lock TTL: the keyring entry carries a kernel timeout (refreshed on activity, throttled), so a dead agent's session self-expires.

    • Lock semantics split: explicit vault lock and idle-lock clear the keyring (durably locked); stop-agent/SIGTERM/crash leave it so the next agent resumes. AgentState::lock (in-memory wipe) vs the new lock_and_clear_session.
    • New crates/vault-agent/src/session.rs over the pure-Rust linux-keyutils crate ([target.'cfg(target_os = "linux")'], MIT/Apache-2.0); a no-op stub elsewhere. main.rs attempts resume at startup via the existing unlock::load_cache + vault_from_user_key path.
    • vault config set agent.session_keyring true (flows to the auto-spawned agent as --session-keyring, mirroring idle_lock_secs).
    • This is the sole, default-off carve-out to PRD §7.3 / G4 ("master key never resident outside the agent process"); documented in PRD §7.3. Off, the key never leaves the process. Linux-only — a no-op everywhere else.
    • Tests: SessionBlob serde round-trip (cross-platform) + a keyring store/load/clear round-trip that skips gracefully where no keyring exists; vault-config agent.session_keyring get/set/unset + agent_args flag emission.

  • Bitwarden personal API-key authentication (2FA accounts). A new auth path that uses the OAuth2 client_credentials grant, which is not 2FA-challenged — so an account with two-factor auth enabled can finally authenticate without an interactive TOTP prompt (Vault has no TOTP entry). The API key authenticates the session only; the Key it returns is still wrapped under the stretched master key, so the master password is still required at every unlock to decrypt the vault.

    • vault login --api-key: reads $BW_CLIENTID / $BW_CLIENTSECRET (matching the official bw CLI), else prompts, then reads the master password. On success the agent authenticates via client_credentials and persists the key (0600 apikey.json in the account data dir) so plain vault unlock (and the TUI unlock) auto-reuse it — no 2FA, no re-supplying creds.
    • vault apikey status / vault apikey forget manage the stored key (status echoes only the non-secret client_id; forget falls back to the password grant).
    • vault-api: BitwardenClient::login_api_key (grant_type=client_credentials, scope=api). vault-store: ApiKeyCreds + save/load/delete_apikey_to_dir (atomic, 0600, custom Debug that redacts the secret). vault-ipc: optional api_key on Request::Unlock (serde-defaulted, forward-compatible) plus ApiKeyStatus / ApiKeyForget verbs and an ApiKeyStatus response (never carries the secret). vault-agent: grant selection (request creds → persisted key → password) with persistence on enrollment, and ensure_online now falls back to API-key re-auth — so a PIN/offline session of an API-key account can still go online for sync/edits even when the grant issued no refresh token.
    • The key is protected at rest by filesystem permissions (0600) only: it must be readable before unlock (it's used during auth), so it can't be wrapped under the user key — the same trust level as the stored refresh token.
    • Tests: vault-api wiremock for the client_credentials form + a bad-key ServerStatus; vault-store round-trip / delete / NotFound / 0600-mode / Debug-redaction units; vault-ipc transport round-trips (api_key present
      • absent-decodes-to-None, ApiKeyStatus). No new external dependencies.

  • TUI in-place unlock. When the agent is locked, vault-tui no longer dead-ends at a "run vault unlock" banner — it shows an interactive unlock prompt for the registered account: type the master password, or Tab to a PIN when one is enrolled, and drop straight into the browser. Reuses the readline TextInput (secret masked with •) and the existing Unlock/UnlockPin requests — no protocol or agent changes; failed unlocks show the error (incl. BadPin { attempts_remaining } / PinLockedOut) and clear the field.

    • To read the account (server/email/device_id) — which a locked agent doesn't report — config.rs was extracted from vault-cli into a shared vault-config crate, now used by both the CLI and the TUI (single source of truth for config.toml; the agent still doesn't read config).
    • Tests: vault-config's units moved with it; new vault-tui units for UnlockState::request (password vs PIN), toggle_pin (no-op without enrollment, clears on switch), unlock_failed, and a TestBackend smoke that the unlock screen shows the account, masks the secret, and offers the Tab hint only when a PIN is enrolled. No new external dependencies.

  • Token persistence + refresh. The OAuth2 refresh token is now kept and reused, so a cache/PIN/offline session can become fully capable and a long-lived session survives access-token expiry.

    • vault-api: BitwardenClient keeps the refresh_token from login_password, exposes it (refresh_token()), and can be seeded with one (with_refresh_token). New refresh() runs grant_type=refresh_token. The four server ops (sync/create/update/delete) route through one send_with_auth helper that, on a 401 with a refresh token held, refreshes once and retries.
    • The refresh token is persisted encrypted under the user key in the cache (refresh_token envelope field) on online unlock + every sync, and recovered into the in-memory session on a cache/PIN unlock.
    • New Vault::ensure_online: a token-less session (offline / PIN) lazily upgrades to online on its first sync/add/edit/remove by building a client from the stored refresh token and refreshing — so PIN unlock stays fast/offline but server ops "just work" when the network is up. A genuinely offline box (or no stored refresh token) still returns Error::Offline.
    • Tests: store refresh-token round-trip; ensure_online returns Offline without a client/token and Ok with a live client; refresh-token recovery from the cache on offline unlock. No new dependencies.

  • PIN unlock. Unlock the vault with a short PIN instead of the master password (like the Bitwarden extension/desktop), built on the encrypted cache.

    • vault pin set (requires an unlocked agent) encrypts the user key under a key derived from the PIN — same KDF/stretch/EncString crypto as the master path, PIN as the secret, email as salt — and stores it as pin_protected_user_key in the cache (envelope schema 3). vault pin disable forgets it; vault pin status reports enabled + attempts left.
    • vault unlock --pin recovers the user key from the cache with the PIN and builds a read-only session (no token — sync/add/edit/remove return Error::Offline, like an offline unlock). Plain vault unlock stays master-password.
    • Lockout: wrong PINs are counted in the cache (so the limit survives an agent restart); the 5th wrong PIN wipes pin_protected_user_key and returns PinLockedOut — re-enable after a master-password unlock. Wrong PINs before that return BadPin { attempts_remaining }. New typed errors BadPin / PinLockedOut / PinNotSet (CLI exit codes 12/13/14). PIN must be ≥ 4 characters (validated client-side).
    • The cache→vault recovery core is shared between the offline-master and PIN paths (recover_user_key + vault_from_user_key); the attempt/lockout logic is a pure pin_attempt over an in-memory cache, with a thin disk-backed unlock_pin wrapper.
    • Tests: store pin-field round-trip; pure pin_attempt lifecycle (recover → reset counter → 5-strike lockout + key wipe → stays locked), PinNotSet with no enrollment, and pin_protect_user_key ↔ recover_user_key round-trip. No new dependencies.
    • Out of scope (tracked): TUI PIN entry; a PIN/offline session syncing once token persistence lands; Bitwarden's "require master password on restart" (memory-only pin key) mode.

  • Encrypted-cache persistence + offline unlock. The agent now writes its vault to disk and can unlock without the network — the substrate for the upcoming PIN unlock (and useful on its own).

    • On an online unlock (and every sync), the agent persists $XDG_DATA_HOME/vault/<account>/cache.json (<account> = sanitized host_email): the /sync response encrypted under the user key, plus the protected_user_key (the login token Key — the user key encrypted under the master-stretched key, safe at rest) and the account kdf params. vault-store was already built for this but had never been wired in; VaultCache is now schema 2 (new fields are serde-defaulted, so any older file still loads).
    • Offline unlock: when a live login fails with a network error and a cache exists, unlock falls back to the cache — re-derives the master key locally from the cached KDF params, decrypts the protected_user_key (the EncString MAC check detects a wrong password → BadPassword), and loads ciphers from the encrypted payload. Bad password / 2FA still propagate (no fallback). Unlock now survives restart and works without connectivity once you've unlocked online once.
    • An offline session has no access token, so Vault.client is None and sync / add / edit / remove return the new typed Error::Offline ("unlock again while online…", CLI exit code 11). Read paths (status / list / get / copy / TUI browse) work fully from cache. (Local mutations don't re-persist the cache yet, so it can lag edits until the next sync — tracked.)
    • Tests: KdfParams serde round-trip; VaultCache protected-key + kdf round-trip and legacy-v1 load; a pure unlock_from_cache recovery + wrong-password rejection; account_dir_name sanitization; and the offline-session Error::Offline gating. No new dependencies.

  • TUI text-input editing — readline keys + bracketed paste (PRD §7.2). The / search, : command line, and every add/edit form field were append/backspace-only Strings with no cursor and no paste. They now share a TextInput { buf, cursor } with real line editing:

    • Cursor movement ←/→/Home/End (+ Ctrl+A/Ctrl+E), Delete at the cursor, and insert anywhere — fix a mid-word typo without deleting back to it.
    • Kill/yank into a shared kill-ring: Ctrl+W (word back), Ctrl+U (to start), Ctrl+K (to end), Ctrl+Y (yank).
    • Bracketed paste (EnableBracketedPaste + Event::Paste): paste a value from the system clipboard — including over SSH/tmux — at the cursor; newlines are stripped (every input is single-line).
    • Ctrl+S submits the add/edit form (PRD §7.2 save). On the form's Type row ←/→/Space still toggle login⇄note; cursor keys edit only in text fields. The caret renders where edits land (gi▌t), not just at the end.
    • Ctrl+C remains the global quit — a deliberate deviation from §7.2's literal Ctrl+C=copy: there's no selection model, and quit-safety/muscle memory win. Deferred (tracked): selection + Ctrl+C/X/V/Z copy/cut/paste/undo, and reading the agent clipboard back for paste.
    • TUI-only — no protocol, agent, CLI, or dependency changes (crossterm 0.28 already exposes the paste API). Tests: TextInput units (insert/delete at cursor, nav clamping, kills return removed text, paste at cursor, UTF-8 boundary safety), kill→yank round-trip, paste-into-focused-field, search-edit re-anchor, and a mid-string caret TestBackend smoke.

  • vault register + vault login — account profile (PRD §7.1). The last two unimplemented verbs, as an account-profile flow (not the Bitwarden personal API-key model, which stays a tracked follow-up).

    • register records the account — server, email (lower-cased), and a freshly minted stable device_id — into a new [account] table in config.toml. No agent or network (a light http(s):// check is the only validation; real errors surface at first login). Re-registering keeps the existing device_id.
    • login authenticates against the registered account (master password → Request::Unlock) and ends on a sync summary (logged in as <email> · <n> items · synced <ts>, or --json). It auto-spawns the agent, so a cold vault login brings everything up.
    • unlock now resolves server/email from the profile too, so its flags (and $VAULT_SERVER/$VAULT_EMAIL) are optional once registered; precedence is explicit flag/env → profile → error. login and unlock share one Request::Unlock — the difference is resolution and login's verbose, status-backed success.
    • Stable device id. Request::Unlock gains a serde-defaulted device_id: Option<String>; the agent uses it as the Bitwarden deviceIdentifier instead of minting a fresh UUID each unlock, so the account stops accumulating a new device per session. Old Unlock frames without the field still decode (regression-tested).
    • Tests: [account] round-trip + "no empty table until set" + device-id mint/preserve + email lower-casing; resolve_account precedence (flag → profile → error); the Unlock device-id round-trip and old-frame-decode regression. New uuid dep on vault-cli (already in the workspace tree).

  • vault config + vault purge (PRD §7.1). A persistent, typed config file and the two remaining settings/maintenance verbs.

    • Config file at $XDG_CONFIG_HOME/vault/config.toml, modeled as a known-key registry: vault config set <key> <value> validates the key and parses the value to its type (a typo or non-numeric value is rejected, not silently kept), vault config unset <key> clears it, and vault config get with no key lists every known key with its effective value (--json on all three). Writes are atomic (tempfile + rename). Recognised keys this release: clipboard.clear_secs and agent.idle_lock_secs (both u64, 0 disables).
    • Wired into auto-spawn. When the CLI starts the agent, it sources those two knobs from the config and passes them as launch flags — so a saved clipboard.clear_secs finally has a persistent home instead of being flag/env-only. On the auto-spawn path the config value populates the agent flag (winning over $VAULT_CLIPBOARD_CLEAR_SECS); a manually launched agent is unaffected, and a malformed config is reported and skipped rather than blocking the spawn.
    • vault purge drops a running agent's in-memory keys (best-effort Lock, never auto-spawning) and removes the on-disk item cache ($XDG_DATA_HOME/vault). Confirmation-gated like remove (--force to skip; required when stdin isn't a TTY); an absent cache is success.
    • CLI-only slice — no protocol, agent, or TUI changes; the agent still receives knobs as the launch flags it already accepted. New toml dependency (MIT/Apache, within the deny.toml allow-list).
    • Tests: config registry units (set/get/unset round-trips, unknown-key and bad-value rejection, 0 accepted, KNOWN_KEYS reachable by all three ops, TOML serde round-trip) and a pure agent_args test for the config→launch-flags mapping (both set / one set / none).

  • Clipboard hardening — clear-on-lock sweep, backend trait, OSC52 fallback, configurable interval. Closes the secret-can-outlive-the-agent limitation tracked since the M5 copy slice, and delivers PRD §7.5 in its architecturally honest shape.

    • Clear-on-lock sweep. The agent remembers the last value it copied (Zeroizing, dropped once a timer clears it) and lock() now sweeps it off the clipboard — covering vault lock, Quit/stop-agent, idle-lock, and the new SIGTERM handler (PRD §7.3: the agent locks, sweeps, removes its socket, and exits on SIGTERM). The sweep keeps the only-if-still-ours rule: a newer copy by the user is never clobbered.
    • Backend trait (PRD §7.5). New vault-agent/src/clipboard.rs defines a Backend trait (arboard is the one system implementation; detection unchanged) so tests inject a fake clipboard — the sweep logic is now exercised end-to-end on headless CI — and a config-selected backend can slot in later. Status gains a serde-defaulted clipboard_backend field ("arboard" / absent) so clients can see what they're talking to; old-agent frames still decode (regression-tested).
    • OSC52 fallback (client-side, by design). OSC52 copies by escaping to the user's terminal — something the detached agent fundamentally cannot do, so PRD §7.5's SSH/tmux fallback lives in the TUI: when the agent declines with the new typed Error::ClipboardUnavailable, the TUI fetches the value (id-targeted Get — the one path where the secret crosses the local UDS, same as vault get) and emits the OSC52 sequence itself, with tmux DCS-passthrough wrapping when $TMUX is set (set-clipboard on required). The TUI runs its own 30 s timed clear (OSC52 ! payload) while it lives, and sweeps on quit; a generated password falls back without any Get since it's already local.
    • Configurable interval. vault-agent --clipboard-clear-secs N (then $VAULT_CLIPBOARD_CLEAR_SECS, then 30; 0 disables) sets the agent's default; Request::Copy/CopyText still override per call. The new Response::Copied { clear_after_secs } reports the effective window, so the TUI's toast now shows the agent's real interval instead of a hardcoded 30. The future vault config file maps onto the same knob.
    • Tests: fake-backend units for sweep-on-lock, never-clobber-newer-copy, and timer/sweep marker interplay; Status backend-name reporting; interval-resolution precedence; OSC52 sequence/clear/tmux-wrapping units; and the old-agent Status decode regression.

  • M5 (slice 5) — CLI agent auto-spawn + headless feature gate. The two non-TUI M5 items, closing out the milestone.

    • Auto-spawn (PRD §7.3). Any vault verb now starts vault-agent itself when the socket is dead (missing file or stale, connection-refused socket — other errors, e.g. permissions, still surface directly). The CLI locates the agent via $VAULT_AGENT_BIN, then a vault-agent sibling of the vault binary, then $PATH; starts it in its own process group (--socket passed explicitly, stdin/stdout null, stderr appended to agent.log beside the socket in the 0700 runtime dir); and poll-connects until the agent accepts (2 s deadline, 25 ms interval), reusing the first accepted stream. Opt out per-call with the global --no-auto-spawn; stop-agent never spawns (stopping a dead agent shouldn't start one). New vault-cli/src/spawn.rs module; the old "start the daemon with vault-agent &" hint remains only on the no-spawn paths.
    • Headless gate (PRD G6). The vault bin now carries required-features = ["cli"], making the documented server install literal: cargo install --path crates/vault-cli --no-default-features --features cli (pair with cargo install --path crates/vault-agent --no-default-features to drop the clipboard's X11/Wayland tree). A new CI headless job builds both combos so the gate can't rot. README's Status and headless sections updated to match reality.
    • Known limitation: two racing CLI invocations can each spawn an agent; the second bind steals the socket path (the listener removes a pre-existing socket file) and the first agent is orphaned until its idle lock. Benign for the single-user posture; a flock around spawn is a possible follow-up.
    • Tests: binary-resolution precedence (override > sibling > $PATH, empty override ignored), dead-socket error classification, and poll-loop behavior (picks up a late listener; gives up at the deadline).

  • M5 (slice 4) — TUI mutations: a add, e edit, d delete (confirm). PRD §7.2's Mutation row goes live, completing the daily-driver loop (browse → search → reveal/copy → mutate) without falling back to the CLI. Pure TUI slice: the agent's M4 write paths (Request::Add / Edit / Remove) are driven as-is — no protocol changes, no agent changes, no new dependencies.

    • Add (a). A centered form overlay with a Type row (login ⇄ secure note, toggled with Space/←/→) over Name / User / Pass / URI / Folder / Notes (notes expose only Name / Folder / Notes). Tab/↓ and Shift-Tab/↑ cycle fields (wrapping); Enter validates (name required) and submits; Esc discards. Ctrl+G in the Pass field fills it with a fresh default-options password (PRD's "generate into the active field" story). Values typed under one type survive a toggle, but hidden login fields never leak into a secure-note submit.
    • Edit (e). Same form, prefilled with the metadata the list already has (name / username / folder); type is fixed. Submit diffs against the prefill: untouched fields ride as "unchanged" on the wire (so an edit never re-encrypts a password it didn't see), a cleared field submits empty. The selected row's exact cipher id is the selector, so duplicate names can't mislead it. An edit with no changes is rejected in-form.
    • Delete (d). A small confirm overlay (Delete 'name'? y/N); y/Enter sends Request::Remove with the exact id, n/Esc backs out.
    • On success the vault reloads and a toast reports saved '…' / deleted '…'; on any error the form stays open so nothing typed is lost. Opening any mutation overlay re-masks a revealed secret. The unfocused Pass field renders masked; form secrets are redacted in Debug (FormState / FormSubmit).
    • Known deviation (tracked): PRD §7.2's full CUA bindings (Ctrl+C/X/V/Z/S/F) and bracketed paste in text inputs are deferred — fields accept typed input only this slice.
    • Tests: 11 new vault-tui units (form open/prefill/gating, focus wrap, type-toggle value preservation, Ctrl+G targeting, submit diff/validation, note-residue exclusion, confirm gating/take/cancel, overlay re-masking, Debug redaction) plus TestBackend smokes for the form overlay (masked unfocused Pass) and the confirm overlay.

  • M5 (slice 3) — TUI search, generator overlay, and : command line. The three previewed keys go live: / filters the item list as you type, g opens a password-generator overlay, and : opens a small vim-style command line.

    • Search (/). Live, case-insensitive substring match on item name and username, composed on top of the active folder filter. Enter accepts the query (filter stays, shown in the Items (n) /query pane title), Esc in search mode drops it, and Esc in normal mode peels an active filter back before quitting. Every query edit re-anchors the selection and re-masks any revealed secret. Arrow keys still move the selection mid-search.
    • Generator (g). A centered overlay over the browser showing a freshly generated password (vault-core's generate_password, same engine as vault generate): g/r regenerate, +/- adjust length (clamped 8–128, Bitwarden's ceiling), s toggles symbols, c copies, Esc closes. The password lives in a GeneratorState (zeroised on drop, redacted in Debug).
    • Copying a generated password uses a new Request::CopyText { text, clear_after_secs }: the value rides the local UDS once (exactly like Unlock's password already does), and the agent writes it to its own clipboard with the same 30-second auto-clear machinery as Request::Copy. Requires an unlocked agent; headless (--no-default-features) builds decline it cleanly.
    • Command line (:). Deliberately tiny vocabulary: q/quit, r/refresh, sync (agent re-pulls /sync, list reloads), lock (agent drops keys, screen flips to the Locked banner). Unknown commands toast the vocabulary. The status bar echoes the line being edited (/query▌ / :cmd▌) ahead of toasts and hints.
    • Tests: vault-tui adds search/compose/re-anchor, command-buffer, and generator (defaults, regenerate, clamp, symbols, Debug-redaction) units plus TestBackend smokes for the query title/status echo, command echo, and generator overlay; vault-agent's locked-session test now covers CopyText-while-locked. No new dependencies.

  • M5 (slice 2) — TUI reveal + clipboard copy. The detail pane is no longer secret-free: Space reveals the selected login's password on demand and c / u / o copy the password / username / URI to the clipboard, with a status-bar toast (copied password · clears in 30s) and a 30-second auto-clear. Copy/reveal act only when the item list is focused.

    • Clipboard lives in the agent, not the TUI. A new Request::Copy { id, name, field, clear_after_secs } has the agent decrypt the field, place it on its own clipboard (arboard, wayland-data-control), and schedule the clear — so the secret never crosses the socket on the copy path, the copy survives the TUI quitting, and a future vault get --copy becomes possible. The auto-clear task only wipes the clipboard if it still holds what we wrote (or can't read it back, failing safe), leaving anything the user copied since untouched. Behind a default-on clipboard feature on vault-agent; a --no-default-features headless build drops the X11/Wayland tree and answers Copy with a clean "not compiled in" error.
    • Reveal uses Request::Get, which gains an id: Option<String> field. The TUI targets the exact selected cipher id, closing a real footgun: get_item matched by name only, so a duplicate item name could reveal/copy the wrong item. Name remains the fallback selector and error label; the CLI passes id: None (unchanged behavior). Revealed plaintext is held in a RevealedSecret newtype (zeroised on drop, redacted in Debug) and re-masked on any navigation.
    • Tests: vault-agent gains an id-targeting-among-duplicate-names regression test and a pure should_clear_clipboard unit; vault-tui adds reveal / re-mask / toast / Debug-redaction units and TestBackend smokes for the masked-by-default, revealed, and toast states.
    • Supply-chain: arboard pulls error-code (BSL-1.0, via Windows-only clipboard-win) — added to deny.toml's allow-list (FSF-confirmed GPL-compatible). No new advisories (cargo deny check advisories clean).
    • Known limitation: on Quit / stop-agent a pending auto-clear task dies with the runtime, so a just-copied secret can linger on the clipboard until overwritten (notably under wayland-data-control's serving process). A clear-on-shutdown sweep is a tracked follow-up.

  • M5 (slice 1) — vault-tui skeleton (read-only browser). The TUI stub is now a real cruxpass-style three-pane interface (ratatui + crossterm): left folder list, center filterable item list, right item detail, with a status bar. It is just another UDS client of the agent — the user key never crosses into it — and drives only the existing Request::Status + Request::List, so no IPC change.

    • Requires a pre-unlocked agent; a locked or absent agent shows a centered banner (Locked / No agent). r refreshes (re-runs Status + List).
    • Keys: q/Esc/Ctrl+C quit, j/k + arrows move, Tab/h/l switch pane focus. Folder selection filters the item list (All / Unfiled / named folders, derived from the entries). The status bar previews the / c u o g : keys as coming-soon so the layout is final.
    • Detail is read-only and secret-free this slice: it shows only the non-secret ListEntry metadata (name, type, username, folder, id) the agent already returned — reveal/copy (which need Request::Get) land with the copy slice. Terminal teardown is RAII + a panic hook, so a panic never leaves the terminal in raw mode. vault-tui --version carries the §13.2 block.
    • New modules app (state + pure nav/filter logic, 6 unit tests), ui (rendering + a #RRGGBB→Color theme helper over vault_theme::steelbore, 2 TestBackend render smoke tests), and client (UDS request helper).
    • Supply-chain: ratatui's tree adds two informational advisories with no fix short of dropping ratatui — RUSTSEC-2024-0436 (paste, unmaintained build-time proc-macro) and RUSTSEC-2026-0002 (lru 0.12.5, unsound IterMut, transitive). paste is ignored in deny.toml; the rustsec/audit-check CI job ignores both (it fails on any advisory, unlike cargo deny) and gains checks: write so it can post its check-run annotations. Both documented with revisit notes.

  • M4 (slice 4) — --json on the lifecycle verbs + a real vault sync. Closes the two remaining M4 items.

    • unlock, lock, sync, and stop-agent now take --json. They stay silent on success in human mode (unchanged — existing pipelines keep working); under --json each emits a small envelope: {"unlocked":true}, {"locked":true}, {"stopped":true}, and for sync {"synced":true,"items":N,"last_sync":"…"}.
    • vault sync now actually re-pulls /sync over the unlock-time session and replaces the in-memory ciphers, folder map, and last_sync stamp (it was an M3 stub that only checked the unlocked flag). The agent answers a successful re-sync with a fresh Status snapshot, so --json can report the new item count. Parity with unlock: only the in-memory vault is refreshed — the agent still doesn't write the on-disk vault-store cache. Known limitation: a sync long after unlock can 401 once the access token expires (no refresh-token flow yet in M4); it surfaces as IpcError::Network, same as add/edit/remove.
    • The /sync → (ciphers, folders) decode is factored out of perform_unlock into a shared unlock::ciphers_and_folders, now the single spine of both unlock and resync. Tests: two direct unit tests on that function (typed-view decode + malformed-folder skipping); the CLI's cmd_simple was retired in favour of cmd_ack (Ok-only acks) and a dedicated cmd_sync.

  • M4 (slice 3) — vault add + vault edit. The two remaining write verbs, the inverse of the read path: caller-supplied plaintext fields are encrypted inside the agent (the user key never leaves it) and POST/PUT to the server. Login (--type login) and secure note (--type note) are supported.

    • vault add <name> [--type login|note] [--username U] [--uri URL] [--folder F] [--notes N] [--generate[=LEN]] [--json]. The password is read from stdin or generated locally with --generate (printed back so the user has it); no --password flag, so secrets never enter argv / shell history.
    • vault edit <selector> [--name|--username|--uri|--folder|--notes ...] [--password (stdin)] [--generate[=LEN]] [--json]. Only the flags you pass change; edit re-encrypts just those fields onto a clone of the original encrypted cipher, so everything it doesn't individually edit — secondary URIs, custom fields, organization membership — survives verbatim. --uri replaces the primary URI and keeps the rest. Folder is resolved by id or case-insensitive name.
    • New vault_core::Cipher::from_plain (the encryption inverse of decrypt), vault_api::BitwardenClient::{create_cipher, update_cipher} (POST/PUT /api/ciphers, camelCase request body with a secureNote marker on type 2), Request::Add / Request::Edit and Response::Saved { id, name }, and the agent's add_cipher / edit_cipher (with folder name→id resolution). Tests: 3 from_plain round-trips (vault-core); resolve_folder and two apply_cipher_edits cases proving a secondary URI survives an edit (agent); and #[ignore]d wiremock create/update + secure-note-marker tests (api).

    (add + edit complete the write verbs; --json on the lifecycle verbs and the real vault sync landed in slice 4 above. M4 feature work is complete — the remaining M4 gate is the end-to-end add → list/get → edit → get → remove run against a real Vaultwarden per docs/m2-vaultwarden.md.)

Fixed

  • vault-agent clippy debt from M4 slice 4 (the stale-artifact gremlin, again). A fresh full compile surfaced three findings a warm clippy cache had masked at commit time: an unused_import (Error as IpcError in server.rs, now only referenced from the test module, so moved there) and two redundant_pub_crate hits (unlock::ciphers_and_folders / now_iso are pub inside a private module, not pub(crate)). No behaviour change — purely the lints CI's cold compile would have failed on.

  • CI is green for the first time (M0–M3 had been red on every push). Four jobs were failing independently of the code's behaviour:

    • clippy -D warnings — the workspace lints enable clippy::pedantic + clippy::nursery and deny unwrap/expect/panic, but clippy had never run to completion locally (a stale-artifact issue), so the debt was never seen. Resolved across every crate: # Errors / # Panics doc sections, const fn, #[must_use], let-chains for collapsible ifs, map_or, sort_by_key, derived Default, Send/Sync bounds on the transport generics (future_not_send), and justified #[allow]s on the infallible-HMAC/RNG expects and the civil-calendar casts in vault-agent::unlock.
    • vault --version now actually emits the §13.2 attribution block. clap only surfaces after_help on --help, so the block was missing from --version; it now rides in long_version (mirrored in vault-agent).
    • rustfmt — cargo fmt --all applied.
    • cargo-deny — two policy decisions, called out explicitly: (1) allow CDLA-Permissive-2.0 (webpki-roots ≥ 1.0 ships Mozilla's CA bundle under it — a permissive data licence, GPL-compatible, no copyleft on the linking program); (2) mark the eight vault-* crates publish = false and set allow-wildcard-paths = true so intra-workspace path deps stop tripping the wildcard ban. A clippy.toml permits unwrap/expect/panic in tests only.

Added

  • M4 (slice 2) — vault remove. Soft-deletes a cipher via DELETE /api/ciphers/{id} and drops it from the in-memory cache. CLI: vault remove <selector> [-f|--force] [--json]. The selector matches Cipher.id exactly first, then falls back to a case-insensitive decrypted-name match; if a name resolves to more than one cipher the agent refuses with AmbiguousItem (CLI exit 10) and prints the matching ids so the caller can retry with the explicit UUID. Interactive callers must re-type the selector to confirm; non-TTY stdin requires --force. vault-agent::Vault now owns the authenticated BitwardenClient (replacing the dead-code access_token field) so future M4 verbs reuse one session. New IpcError::AmbiguousItem { name, ids } variant; new Response::Removed { id, name }. Three new tests: resolve_cipher_matches_by_id_then_name, resolve_cipher_rejects_ambiguous_name (agent), and an #[ignore]d wiremock test delete_cipher_sends_authorized_delete (api) that asserts the Bearer header and surfaces 404 as ServerStatus.
  • M4 (slice 1) — vault generate. Pure-local password generator with no agent or server interaction. vault-core::generate::generate_password takes a GenerateOptions (length + per-class toggles for lowercase, uppercase, digits, symbols) and returns a Zeroizing<String>. Sampling uses OS getrandom with 64-bit rejection sampling to avoid modulo bias; output is seeded with one character from each enabled class then Fisher–Yates shuffled. CLI verb vault generate [--length N] [--symbols] [--no-lowercase] [--no-uppercase] [--no-digits] [--json]. 8 integration tests in crates/vault-core/tests/generate.rs.
  • M0 scaffolding: Cargo workspace, eight member crates (vault-core, vault-api, vault-store, vault-agent, vault-ipc, vault-cli, vault-tui, vault-theme).
  • vault --version emits the Standard §13.2 attribution block.
  • Posture files at repo root: README.md, NOTICE.md, CONTRIBUTING.md, LICENSE, CREDITS.md, CHANGELOG.md.
  • PRD.md — full product requirements document.
  • CI configuration: fmt, clippy -D warnings, cargo audit, cargo deny.
  • M2 — login + sync against Vaultwarden.
    • vault-core::login::master_password_hash — base64 PBKDF2-SHA-256(master_key, password, 1) for /identity/connect/token.
    • vault-api — BitwardenClient over reqwest + rustls, with prelogin, login_password, and sync methods. BaseUrls accommodates both Bitwarden's hosted split (api.bitwarden.com + identity.bitwarden.com) and Vaultwarden's single-origin /api + /identity deployment. Two-factor detection on 400 with TwoFactorProviders[2] surfaces a typed TwoFactorRequired error.
    • vault-store — VaultCache with serde JSON envelope on disk and an encrypted payload field (Vault EncString over the raw /sync response). Writes go through an atomic NamedTempFile::persist rename.
    • Tests — vault-api::tests::parsing (7) covers wire-shape decoding; vault-store::tests::cache (4) covers the encrypted persistence round-trip; vault-api::tests::login_sync is the full wiremock integration test, kept #[ignore] pending a clean test-binary linker environment (see file preamble — library and --bin vault build fine).
    • docs/m2-vaultwarden.md — recipe for the real Vaultwarden-in-a-container manual gate.
  • M1 — offline export decrypt. vault-core now ships:
    • EncString (Bitwarden type 2: AES-256-CBC + HMAC-SHA-256, Encrypt-then-MAC with constant-time verification; legacy types 0/1 explicitly rejected).
    • kdf::{KdfType, KdfParams} and derive_master_key covering PBKDF2-SHA-256 and Argon2id (with Bitwarden's SHA-256 salt preprocessing).
    • stretch_master_key — HKDF-SHA-256 expansion of a 32-byte master key into a 64-byte (enc, mac) pair using the official info="enc" / info="mac" labels.
    • EncryptedExport — parser and decryptor for password-protected Bitwarden .json exports, validating the password against encKeyValidation_DO_NOT_EDIT before touching the data payload.
    • 9 integration tests covering round-trip, tampering detection, both KDFs, wrong-password rejection, and envelope-shape validation.