Commit Graph

67 Commits

Author SHA1 Message Date
Zaki 2ef636ce30 feat: unified entry slideover + custom icons + UX fixes
Unified create/edit slideover
- openSlideOver(id) now accepts null for new entries. Same UI
  (icon, name, site, user, password, TOTP, folder, tags) for both
  create and edit. Drops the separate entry modal — no more "save
  first, then add TOTP" two-step.
- "+ New" button, Ctrl+K → New entry, and Ctrl+Shift+A all route
  through the slideover. Ctrl+Shift+A pre-fills the title with the
  foreground window's name.
- Save button visible from the start in new mode (no dirty wait).
- Title shows mode unambiguously: cyan "+ New entry" vs
  "Edit · <name>".

Custom icon upload (soIconField)
- 56×56 preview at the top of every slideover + Upload icon /
  Remove buttons. Same POST /entries/{id}/icon endpoint as the
  auto-fetch path. Validates type / size (64 KB cap matching server).
- Solves the case where DDG doesn't index a domain (self-hosted
  apps, private sites): the user pastes any image and it sticks.

Favicon: privacy-first, DDG only
- Removed the direct-fetch fallback steps (3-5). Privacy stance:
  zero DNS leak outside icons.duckduckgo.com. Domains DDG doesn't
  cover stay icon-less until the user uploads a custom one.
- PM.Favicon.FetchFaviconDataUri takes an optional TFaviconLog
  callback so UMainForm can stream per-step trace into LogLine for
  diagnostics.

Fixes
- Slideover z-index 30 → 50. The topbar's backdrop-filter creates a
  stacking context at z-index 40 which was clipping the slideover
  header (title + close button hidden behind topbar).
- RestoreFromTray no longer un-maximises a maximised window when
  called outside a tray-restore context (Ctrl+Shift+A, Ctrl+Shift+L
  picker, app/focus cmd). SW_RESTORE on a maximised window reverts
  to normal — now we only SW_RESTORE if IsIconic.
- "Show all"/"Show less" per-category state survives renderGrid
  re-renders (healthExpanded map).
- "+ New" and dashboard "Fix" buttons stopPropagation so the
  document-level click-outside handler doesn't close the slideover
  they just opened.
- soDirtyCheck keeps Save visible while in new mode regardless of
  diff.
- openSlideover → openSlideOver typo fix across all call sites.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
2026-06-10 00:15:20 +01:00
Zaki ad5fb21a18 feat: website favicons + vault health dashboard
Favicons
- PM.Favicon (new): THTTPClient/WinHTTP proxy to icons.duckduckgo.com.
  Native Windows TLS — no OpenSSL DLLs to ship (Indy would fail
  silently without them). 5 s timeout, max 3 redirects, 64 KB cap,
  magic-byte MIME sniffing.
- DB: vault_entries.icon_b64 TEXT (idempotent migration).
- Endpoints: POST /entries/{id}/icon stores a cached data URI without
  forcing a full PUT (which would re-encrypt the password). DELETE
  /entries/icons/all purges the cache.
- Bridge cmd://favicon/fetch?host=X&reqId=Y runs in an anonymous thread
  so the up-to-5 s HTTP GET doesn't block the main thread; result
  shipped back via Bridge.onFaviconResult(reqId, host, dataUri).
- Hostname validated on both sides (JS faviconHost + Delphi
  NormalizeHost) so brand labels like "Gitea" never leak upstream.
- Settings: opt-in "Fetch website icons" toggle (synced), three explicit
  actions (Fetch missing / Re-fetch all / Clear cache) that bypass the
  toggle — manual user actions always work.
- Entry card avatar shows <img> when cached, falls back to initials.
  onerror handler recovers silently from a corrupt data URI.

Vault health
- New sidebar Tools → "Vault health" view. Four category cards:
  Weak (strength < 50), Reused (same plaintext on ≥ 2 entries), Old
  (updated_at > 365d), Pwned (HIBP cache).
- Score 0-100 with colour band (Good/Fair/At risk/Critical).
- One-shot computation cached per session (healthCache), invalidated
  on lockVault, entry save, and the explicit "Recompute" button.
- "Fix" button on each item opens the slideover for the affected
  entry, unmasks the password, focuses it, and pulses the dice button
  — full context preserved, user decides how to fix.
- Click handler stopPropagation prevents the document-level
  "click outside slideover" listener from closing the panel that
  we just opened in the same click event.

Fixes
- openSlideover typo (lowercase O) → openSlideOver across all call
  sites. Was silently breaking the Authenticator card click and the
  Vault health Fix button.
- W1050 WideChar warning in PM.Favicon — replaced set-membership
  with explicit Ord-style range comparisons.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
2026-06-09 00:05:54 +01:00
Zaki 33e4b4b614 feat(autostart): "Start with Windows" toggle
- PM.AutoStart wraps HKCU\Software\Microsoft\Windows\CurrentVersion\Run.
  Value "PMServer" = "<exe>" -tray. Per-user, no admin required, shows
  up in Task Manager → Startup so the user can override from there.

- UMainForm honours the -tray CLI flag (set by the registry entry):
  after the server starts, MinimizeToTray via TThread.ForceQueue so the
  app comes up directly in the tray with no visible window flash.

- Bridge cmd://autostart/{get,set} + Bridge.getAutoStart() /
  setAutoStart() / onAutoStartStatus(). Settings exposes a toggle in
  the Security section, visible only when Bridge.active (the PHP
  frontend can't touch the registry).

- Toggle reads "on" only when the registered command matches the
  current exe path, so a stale entry from a moved exe lets the user
  re-enable to refresh.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
2026-06-08 21:39:37 +01:00
Zaki 40b3154a34 feat: MFA tools, single-instance, tray polish, prefs persistence
Session highlights:

- feat(prefs): DPAPI-backed key/value store (PM.UserPrefs) — fixes
  rememberedUsername being lost across reboots due to the random
  ephemeral HTTP port changing the localStorage origin every launch.
  Bridge cmd://prefs/{get,set} round-trips through Delphi.

- feat(tray): icon visible from startup (NIM_ADD at constructor, not
  at first minimize). Tray context menu themed via uxtheme!135
  SetPreferredAppMode so it follows the app's dark/light setting.

- feat(single-instance): named mutex + RegisterWindowMessage broadcast.
  Second launch posts WM_PMSHOW to HWND_BROADCAST and exits; the
  running bridge restores the window from tray. Mutex lives in Local\
  namespace so distinct Windows users can still each run one.

- feat(mfa): Authenticator sidebar view (live TOTP codes for every
  entry with a secret) + standalone TOTP generator modal (paste
  base32 / otpauth:// URI, or generate a random 20-byte secret).

- feat(sidebar): Folders / Tags / Tools sections collapsible with
  chevron toggle. Badge counts stay visible when collapsed. State
  persisted in settings_json (synced across devices).

- feat(autofill): hotkey when vault is locked now restores the app
  and focuses the master password input instead of no-op'ing
  silently. Cleaner UX for the common "I hit Ctrl+Shift+L but the
  vault was locked" path.

- feat(quick-unlock): when enabled, skip lockVault on Windows lock /
  sleep. Rationale: the DPAPI blob already gates access via the
  Windows account, so re-locking on top of the OS lock is redundant.
  Idle auto-lock still fires (separate opt-in).

- fix(quick-unlock): re-sync state.quickUnlockEnabled from DPAPI
  source-of-truth at boot, instead of trusting (now-volatile)
  localStorage.

- docs: CLAUDE.md updated with all new modules, bridge commands,
  and the port-ephemeral pitfall.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
2026-06-08 21:31:39 +01:00
Zaki 664db65437 fix(db): declare TOTP param DataType so .Clear works on first row
FireDAC raises EFDException -335 "data type unknown" when .Clear is
called on a TFDParam before any typed value has been assigned. Hit
in PM.Handler.Auth.HandleChangeMasterPassword when the first entry
in the migration loop had no TOTP secret — already fixed inline.

Same latent bug existed in every other handler that touches the
optional totp_secret / totp_iv columns:
 - HandleCreateEntry      (Entries.pas)
 - HandleUpdateEntry      (Entries.pas)
 - HandleBulkImport       (Entries.pas)

All three now declare:
  LQ.ParamByName('ts').DataType  := ftString;
  LQ.ParamByName('tiv').DataType := ftString;
right after setting SQL.Text, so the very first .Clear (when an
entry has no TOTP) doesn't fail with "data type unknown" on the
SQLite param binding path.

For HandleBulkImport the declaration is hoisted out of the per-entry
loop since the prepared statement is reused across iterations.
2026-05-23 16:17:01 +01:00
Zaki d13e5bc89f feat(zero-knowledge): client computes verifier, master pw never leaves the browser
THE GAP THIS CLOSES
===================
Before this commit, every auth endpoint accepted the master password
in plaintext. The server ran PBKDF2 + SHA-256 server-side to verify.
That means:
 - master pw traveled over HTTP (loopback, but still observable by
   any process that can intercept localhost)
 - master pw sat in the server's process memory (a local string
   variable) for the ~500 ms PBKDF2 took to run
 - a memory dump of PMServer.exe during /login would expose it

This commit moves the PBKDF2 step to the CLIENT and sends only the
hex result (the "verifier") to the server. The master pw never
leaves the browser — server is now zero-knowledge in the everyday
sense (the stored hash and the hash-format remain the same; SRP-
style proper zero-knowledge would be another refactor).

NEW ENDPOINT
============
POST /login/challenge  body { username }
                       -> { salt, kdfIterations, hashAlgo }

First leg of login: client posts username, server returns the params
needed for the client to compute PBKDF2 locally. Per-IP rate-limited.
Returns 404 for unknown user — client masks this as a generic
"Invalid credentials" toast to preserve user-existence opacity
(consistent with the existing /login timing leak).

UPDATED ENDPOINTS
=================
All auth endpoints now accept EITHER plaintext masterPassword OR a
precomputed verifier. New helpers in PM.Handler.Auth:

  function IsValidVerifier(s): 64 hex chars sanity check
  function VerifierToStoredHash(v, algo): SHA-256 wrap (CURRENT) or
                                          identity (LEGACY)
  function CheckVerifier(v, stored, algo): constant-time compare

Endpoint matrix:
  /register        :: salt, kdfIterations, verifier (all client-gen)
                      OR masterPassword (legacy)
  /login           :: verifier OR masterPassword
  /reauth          :: verifier OR masterPassword
  /migrate-kdf     :: oldVerifier + newVerifier OR masterPassword
                      (oldVerifier = under current iters, newVerifier
                      = under target iters)
  /change-master-pw:: currentVerifier + newVerifier + newSalt
                      OR currentMasterPassword + newMasterPassword
  /recovery-key/setup :: verifier OR masterPassword
                         (via VerifyMasterPassword helper updated to
                         accept either input)

When a verifier is present, the server simply applies the SHA-256
wrap (for HASH_ALGO_CURRENT) or compares directly (LEGACY) — no
PBKDF2 work, no plaintext pw in memory.

CLIENT
======
New helpers in app.js:

  bytesToHex(arr) : matches the server's PBKDF2_SHA256_Hex output
                    format (lowercase hex, no separators)
  deriveKeyAndVerifier(pwd, saltHex, iters)
                  : single PBKDF2 → returns BOTH the AES-GCM CryptoKey
                    AND the hex verifier. No double-PBKDF2 cost.
  computeVerifier(pwd, salt, iters)
                  : verifier-only variant for places that don't need
                    the CryptoKey (reauth, recovery setup, ...).

state.kdfIterations is now tracked + persisted to sessionStorage so
verifier computation works without a fresh /login/challenge round
trip on every reauth / change-pw / recovery setup.

Flows updated:
  doLogin           : POST /login/challenge → derive locally → POST
                      /login with verifier. CryptoKey reused from
                      the same PBKDF2 run.
  doRegister        : client-side randomHexSalt + derive → POST with
                      {salt, kdfIterations, verifier}.
  doUnlock          : verifier from cached salt+iters → POST /reauth.
  runKdfMigration   : compute oldVerifier + newVerifier from same
                      salt at different iters → POST.
  doChangeMasterPassword:
                    : currentVerifier (old salt+iters) + newVerifier
                      (fresh salt, target iters) + newSalt. New key
                      ready in memory by the time we POST.
  doGenerateRecoveryKey:
                    : verifier → /recovery-key/setup.
  enableQuickUnlock,
  doExport          : both /reauth callers switched to verifier.

Persistence
===========
The DPAPI quick-unlock blob (when enabled) now includes kdfIterations
so cold-start restores can correctly re-derive verifiers if reauth
is needed later. Recovery redeem similarly stashes kdfIterations
from the server response.

Backward compat
===============
Server endpoints still accept the legacy masterPassword path so
older client builds keep working through the next deploy. Future
cleanup: drop the plaintext branches once everyone has rolled
forward.

What this does NOT achieve
==========================
This is not SRP / OPAQUE. The stored value on the server IS the
final hash, and a stolen vault.db gives the attacker something they
can directly verify candidate guesses against (offline brute force).
Closing that requires asymmetric proofs (client and server holding
different things), which is a much larger refactor. The realistic
win here is "master pw never transits the network or sits in server
memory" — that's a meaningful reduction in attack surface, not a
cryptographic miracle.
2026-05-23 12:03:41 +01:00
Zaki 749dc87058 feat(unlock): Quick unlock via DPAPI (remember on this device)
User-controlled opt-in to skip the master-password prompt on subsequent
app starts. The vault state (raw AES key + salt + username + session
token) is bundled and handed to the Delphi side, which DPAPI-encrypts
it with CRYPTPROTECT_CURRENT_USER and stashes the blob at
%LOCALAPPDATA%\PMServer\quickunlock.bin.

Honest threat model
===================
This is NOT biometric authentication. The DPAPI scope is the Windows
USER ACCOUNT — any process running as the same user can decrypt the
blob via the same DPAPI call. The security perimeter is the Windows
account itself. The Settings UI label is "Quick unlock" with an
explainer:
  "convenient on a personal machine, not safe on a shared one"

If the user has Windows Hello / fingerprint / PIN configured at the
OS level, then Windows login is biometric-gated and that gating
transitively applies to DPAPI access — but the cryptographic strength
of the encryption isn't tied to the biometric, it's tied to the
Windows account secret. Honest framing matters here, so the feature
isn't sold as "biometric".

Backend
=======
New unit Source/PM.QuickUnlock.pas:
 - StoreQuickUnlock(bytes) → DPAPI-encrypt and persist to
   %LOCALAPPDATA%\PMServer\quickunlock.bin
 - LoadQuickUnlock(out bytes) → read file, DPAPI-decrypt
 - ClearQuickUnlock → forget-me
 - HasQuickUnlock → file existence probe
DPAPI declarations are local (CryptProtectData / CryptUnprotectData
from crypt32.dll) — Winapi.WinCrypt's signatures drift across Delphi
versions and we don't want to fight that.

Bridge commands (UMainForm.HandleBridgeCommand):
 cmd://quickunlock/store?data=<base64>   payload opaque to Delphi
 cmd://quickunlock/get                   → ExecuteJavaScript callback
                                           Bridge.onQuickUnlockResult(b64|null)
 cmd://quickunlock/clear                 forget-me
 cmd://quickunlock/status                → Bridge.onQuickUnlockStatus(bool)

The get / status results are returned via ExecuteJavaScript rather than
HTTP (the bridge is request-only) — JS resolves a Promise that the
caller awaited.

Client
======
state.quickUnlockEnabled mirrors localStorage flag, lazy-cleared if the
backing DPAPI blob has gone missing (e.g., user reset Windows profile).

enableQuickUnlock():
  1. askReauth + /reauth to verify it's actually the user.
  2. exportKey('raw', state.cryptoKey) — extractable already.
  3. JSON-bundle { v, username, salt, token, csrf, key } → base64.
  4. cmd://quickunlock/store sends the blob to Delphi.

tryQuickUnlock() (called from init):
  1. Probe localStorage flag.
  2. cmd://quickunlock/get, await Bridge.onQuickUnlockResult.
  3. Decode JSON, importKey, restore state.* + sessionStorage.
  4. Return true on success, false to fall through to master-pw login.

Two restore scenarios both covered:
 A. Same app session (sessionStorage still populated, only cryptoKey
    was wiped by lock). tryQuickUnlock just restores the key.
 B. Cold start (sessionStorage empty). tryQuickUnlock restores
    EVERYTHING from the DPAPI blob, including the session token.

UI
==
Settings panel → new "Quick unlock" section above Recovery key.
Single toggle button: "Enable on this device" / "Disable" with status
line above. Opens settings → bridgeQuickUnlockStatus() reconciles the
JS-side flag with the actual file (drift detection).

Stale-blob protection
=====================
The stored blob holds the AES key BYTES, which would become useless
if the vault were re-encrypted under a different key. Three paths
that re-encrypt the vault now also wipe the DPAPI blob:
 - Explicit doLogout (user said "I'm done")
 - Master password change (new key, old blob can't decrypt anything)
 - (Recovery redeem already forces master pw change → covered.)

The blob persists across the passive lockVault() flow on purpose —
that's the whole point: lock without losing convenience.

Init wiring
===========
On app start, the existing "restore session from sessionStorage" path
now falls through to tryQuickUnlock if either sessionStorage is empty
OR the cryptoKey is gone. Auth screen shows up only after both
attempts fail.
2026-05-23 11:25:39 +01:00
Zaki 01c56edf25 feat(recovery): single-use recovery code for forgotten master password
In a zero-knowledge vault, forgetting the master password normally
means losing the data — the AES key is derived from the master pw
and the server can't help. This commit adds the standard escape
hatch: a one-time recovery code that key-wraps the AES key so the
user can get back in.

Threat model
============
The plaintext recovery code is shown to the user exactly once, at
generation time. Server only ever stores SHA-256(code) + an AES-GCM
wrap of the vault key under a KEK = PBKDF2(code, kdf_salt, 600k).
Without the plaintext code the server cannot unwrap. The code is
high-entropy (96 bits from a 32-char ambiguity-free alphabet, in 4
groups of 4) — printed form is misreading-resistant.

Single use: redeeming deletes the row inside the same DB.Lock the
lookup happened in, so concurrent redeem attempts are race-free.
Failed redemptions feed both the per-IP rate limit AND the per-
username lockout, so brute-forcing the code is infeasible.

Schema
======
recovery_keys (
  user_id      INTEGER PRIMARY KEY (1:1 with users, FK cascade),
  code_hash    TEXT NOT NULL          (SHA-256 hex of plaintext code),
  kdf_salt     TEXT NOT NULL          (PBKDF2 salt for KEK derivation),
  wrapped_key  TEXT NOT NULL          (base64 AES-GCM ciphertext of vault key),
  wrapped_iv   TEXT NOT NULL          (base64 12B IV for the wrap),
  created_at   DATETIME DEFAULT CURRENT_TIMESTAMP
)

Backend: new unit PM.Handler.Recovery
=====================================
  GET    /recovery-key/status   (auth)         -> { configured, created_at? }
  POST   /recovery-key/setup    (auth + CSRF)  body {masterPassword, codeHash,
                                                     kdfSalt, wrappedKey, wrappedIv}
  DELETE /recovery-key          (auth + CSRF)  -> remove config
  POST   /recovery-key/redeem   (NO auth)      body {username, code}
                                               -> session + wrappedKey + wrappedIv + kdfSalt
                                                  + user's current salt + kdfIterations

VerifyMasterPassword() helper handles both legacy 'pbkdf2' and
current 'pbkdf2-sha256' schemes consistently with PM.Handler.Auth.

Setup flow
==========
1. Settings → "Generate recovery code" button (asks master pw via reauth).
2. Client generates: 16-char code + fresh kdf_salt + exports the current
   AES key via crypto.subtle.exportKey('raw').
3. Client wraps the raw key under KEK=PBKDF2(code, kdf_salt, 600k)
   with a random 12B IV → base64.
4. POSTs to /recovery-key/setup. Server verifies master pw, INSERT-or-
   replaces the row (DELETE+INSERT, no UPSERT — same pattern as the
   lockout table since FireDAC's UPSERT support is patchy).
5. Confirm modal shows the plaintext code in a monospace, user-select-all
   panel. The modal is forcing: "I saved it" button is the only way out.
   Modal is the only place the code ever appears — server never sees it.

Redeem flow (forgot master pw)
==============================
1. Auth screen → "Forgot master password? Use a recovery code" link.
2. promptDialog: username, then code (masked input).
3. POST /recovery-key/redeem. Server hashes the typed code, joins with
   users by username, ConstantTimeEquals against stored hash. On match:
     - deletes the recovery_keys row (single-use)
     - issues a fresh session token + CSRF
     - returns: { token, csrfToken, salt, kdfIterations, kdfSalt,
                  wrappedKey, wrappedIv, userId }
4. Client unwraps the AES key with PBKDF2(code, kdfSalt, 600k) → raw bytes
   → importKey('raw') back into a CryptoKey.
5. State is reconstituted from the new session, persistCryptoKey, enterApp.
6. Client immediately opens the Change-master-password modal — the
   recovery code is consumed and the account needs a fresh master pw
   AND a fresh recovery code (the user generates a new one from Settings).

Backward compat
===============
Recovery is opt-in. Existing users see "No recovery key set" in Settings
until they generate one. No migration needed — the table is created via
CREATE TABLE IF NOT EXISTS at server startup, FK cascade on user delete.

Minor UI additions
==================
 - .btn-link CSS class for the auth-screen "Forgot master password?" link.
 - Recovery-status label in Settings refreshed on every openSettings()
   via GET /recovery-key/status.
2026-05-23 11:18:34 +01:00
Zaki cca8184b81 feat(auth): change master password with full vault re-encryption
Adds the canonical PM feature: let the user pick a new master password
and have every entry transparently re-encrypted under the new key,
without ever exposing plaintext to the server.

Backend endpoint: POST /change-master-password
==============================================
Body:
  {
    currentMasterPassword,   verified against current stored hash
    newMasterPassword,       basis for the new hash + new client key
    newSalt,                 64-char hex, client-generated
    entries: [{ id, encrypted_password, iv,
                totp_secret?, totp_iv? }, ...]
  }

Flow:
  1. Authenticate + RequireCSRF (caller already logged in).
  2. RejectIfAccountLocked — pw change is brute-forceable through a
     hijacked session, so it respects the same per-account lockout as
     /login.
  3. Verify currentMasterPassword against the stored hash. Branches on
     hash_algo to handle both legacy 'pbkdf2' and current 'pbkdf2-sha256'.
     Wrong pw → RecordFailedAccountAttempt + audit + 401.
  4. Compute new auth hash = SHA256(PBKDF2(new_pw, new_salt, 600k)),
     always using the current scheme (migration baked in).
  5. ATOMIC transaction:
       UPDATE users SET password_hash, salt, kdf_iterations, hash_algo
       UPDATE vault_entries SET encrypted_password, iv, totp_secret, totp_iv
       (per entry)
     Any failure → rollback, user stays on the old config.
  6. DeleteAllUserSessions — every OTHER session is invalidated so a
     leaked old token can't keep working past the rotation. The current
     caller's session stays valid.
  7. ClearAccountLockout + audit_log entry.
  8. Returns { message, salt, kdfIterations }.

Client
======
New modal in index.html (#changeMasterModal) with three password
fields (current / new / confirm) + inline error display. Added a
"Change master password" button in the Settings panel → Account
section. Escape-key handler routes through it like the other modals.

doChangeMasterPassword():
  1. Local validation: all fields filled, new ≥ 8 chars, new == confirm,
     new ≠ current. Fast failure beats a round trip.
  2. randomHexSalt() → 32 secure random bytes, hex-encoded.
  3. Derive newKey = PBKDF2(new_pw, new_salt, 600k).
  4. Walk state.entries: decrypt password + (optional) TOTP under the
     current key, re-encrypt under newKey with fresh random IVs.
     One decrypt failure aborts the whole change — better than partial
     commit.
  5. POST to /change-master-password.
  6. On success: swap state.salt + state.cryptoKey, persistCryptoKey,
     update sessionStorage, refresh cached ciphertexts in state.entries,
     close modal, toast.
  7. On 401 / 429 / generic error: show inline error in the modal so
     the user can fix and retry without re-typing everything.

Threat model notes
==================
 - The current session token stays valid because the new server hash
   only invalidates OTHER sessions. Self-logout would be needlessly
   disruptive (user already proved knowledge of both pws).
 - Server still sees the old + new master pws transiently in /change-
   master-password. Same trade-off as /login — eliminating it requires
   redesigning to send pre-computed verifiers (SRP-style), tracked
   separately.
 - The salt rotates with the password — best-practice against any
   precomputed dictionary attack tied to the previous salt.
2026-05-23 11:11:38 +01:00
Zaki 4b15811221 feat(import): JSON / CSV vault import with heuristic column mapping
Round-trip companion to the existing doExport(). Supports two file
formats with auto-detection (extension + first-char sniff):

JSON
====
Native shape produced by doExport() AND a forgiving fallback for any
flat array of entry objects with site/url + password fields. Accepts:
  - { version, exported_at, entries: [...] }   (native)
  - [{ ... }, { ... }]                          (flat array)
  - mixed keys: site|url|name, username|user|login|email, etc.

CSV
===
RFC-4180-ish parser (~30 lines): quoted fields, escaped "", commas
inside quotes, CRLF line endings. No streaming since password-manager
imports are realistically MB-scale at most.

Heuristic column mapping (case + underscore tolerant) covers the
common exporters out of the box:

  Site/URL     : name, title, url, site, website, login_uri, login_url
  Username     : login_username, username, user, login, email
  Password     : login_password, password, pass, pwd
  Folder       : folder, group, category, path, collection
  Tags         : tags, labels (comma/semicolon-split)
  Notes        : notes, note, comment    (short notes joined into tags)
  TOTP         : login_totp, totp, otpauth, authenticator, two_factor

If the TOTP column holds a full otpauth:// URI it's parsed and only
the secret param is stored — same path used by the slide-over TOTP
field. Invalid base32 TOTP secrets are dropped silently rather than
failing the whole import.

Backend
=======
New endpoint: POST /entries/bulk-import
Body: { entries: [{ site, username, encrypted_password, iv, folder,
                    tags, totp_secret, totp_iv }, ... ] }
Caps at 10,000 entries per request as a sanity bound. Inserts inside
a single SQLite transaction — partial failure rolls back cleanly, the
user retries from the same source file. Returns { imported: N }.

Rows missing site or ciphertext are skipped within the transaction
(not failed) so one bad row in a 500-entry import doesn't blow up
the whole batch.

Client flow
===========
doImport():
  1. Hidden <input type="file" accept=".json,.csv"> picker
  2. Read text, detect format, route to parseEntriesFromJSON or CSV
  3. confirmDialog preview: count + first 3 sample sites + skipped rows
  4. On confirm: encryptImportEntry() each plaintext entry with the
     current vault key (reuses encryptPwd / base32Decode validation)
  5. Single POST to /entries/bulk-import
  6. Reload entries, refresh UI, trigger HIBP scan if enabled

UI
==
Two entry points (mirroring Export):
 - Sidebar "Import vault" nav item, next to "Export vault"
 - Settings panel "Import" section with descriptive blurb
Both call doImport(). New i-log-in icon added to the SVG sprite (mirror
of i-log-out used by Export).

Limitations
===========
 - No de-duplication: importing the same file twice yields duplicate
   entries. Trade-off to keep the v1 simple — the user can sort it
   out with the existing trash/multi-select UI.
 - No password-protected vault formats (Bitwarden encrypted JSON,
   KeePass kdbx). Only plaintext exports — same trade-off as
   doExport() which produces plaintext JSON.
2026-05-23 05:30:08 +01:00
Zaki 60aa106a30 fix(crypto): SHA-256 wrap auth hash so vault.db at rest no longer = AES key
THE PROBLEM
===========
Before this commit, users.password_hash stored on the server contained
PBKDF2(pw, salt, iters) in hex — the exact same 32 bytes the client
uses as the AES-GCM key to encrypt every entry. Anyone who got hold of
vault.db (filesystem access, backup leak, etc.) had the encryption key
in their hand, no brute force needed. The increased PBKDF2 iteration
count from the previous commit helped against the cipher-text path,
but the easier path was right there in the user row.

THE FIX
=======
Wrap the PBKDF2 output in SHA-256 before storing:

  password_hash = SHA256(PBKDF2(pw, salt, iters))

SHA-256 is one-way. The stored hash can still be verified at login
(server recomputes PBKDF2 from the posted master pw, then SHA-256s it,
compares to stored), but the AES key can no longer be recovered from
it. At rest, vault.db only contains an irreversible derivative.

The server still sees pw transiently during /login while computing
the comparison — eliminating that requires a redesigned auth
protocol where the client sends a pre-computed verifier (SRP, OPAQUE,
or simply SHA-256(PBKDF2(pw, salt, iters)) sent from the client).
That's a separate, larger refactor. This commit closes the at-rest
hole, which is the realistic attack surface for vault file leaks.

SCHEMA / MARKER
===============
users.hash_algo distinguishes the two schemes:
  'pbkdf2'        — LEGACY (raw hex, = AES key)
  'pbkdf2-sha256' — CURRENT (SHA-256-wrapped, one-way)

A constant HASH_ALGO_CURRENT replaces the string literal everywhere
to avoid silent drift between the writer and the reader sides.

MIGRATION
=========
Folded into the existing /migrate-kdf endpoint introduced for the
100k→600k iteration bump. Login response now signals migration on
EITHER:
  - kdf_iterations < PBKDF2_ITERATIONS_TARGET, OR
  - hash_algo != 'pbkdf2-sha256'

The endpoint handles both transitions in one atomic transaction:
  UPDATE users SET password_hash = SHA256(PBKDF2(pw, salt, 600k)),
                   kdf_iterations = 600000,
                   hash_algo = 'pbkdf2-sha256'
  UPDATE vault_entries SET encrypted_password, iv (per entry, if KDF changed)

Idempotency tightened: the "already at target" short-circuit now
requires BOTH conditions, not just the iteration count. Without this,
users who migrated KDF before this commit landed would have been
stuck on the legacy hash format.

CLIENT
======
runKdfMigration() branches on whether the KDF actually changed:
  - kdfChange (fromIters !== toIters): re-encrypt all entries with the
    new key, send them in the entries array, swap state.cryptoKey on
    success. Shows "Vault security upgraded" toast.
  - !kdfChange (hash format only): skip the entry re-encryption loop
    entirely, send entries: []. Silent — the user didn't perceive a
    weakness change worth toasting about.

LOGIN / REAUTH
==============
Both now branch on hash_algo to pick the right verifier:
  HASH_ALGO_LEGACY  → ConstantTimeEquals(stored, PBKDF2(pw, salt, iters))
  HASH_ALGO_CURRENT → ConstantTimeEquals(stored, SHA256(PBKDF2(pw, salt, iters)))

Same constant-time comparison helper as before. Same legacy bcrypt
fallback (still 501-not-implemented).

ALL THREE SCENARIOS AFTER THIS COMMIT
=====================================
1. New register: starts at HASH_ALGO_CURRENT + 600k. No migration ever.
2. Legacy 100k + 'pbkdf2': full migration on next login (hash format
   + iter count + entry re-encryption) in one transaction.
3. Mid-state (already-migrated KDF + still-'pbkdf2'): hash format
   upgrade only on next login, no entry re-encryption.
2026-05-23 05:19:39 +01:00
Zaki cf94f67488 feat(2fa): TOTP secret storage + live 6-digit code generation
Adds RFC 6238 TOTP (Google Authenticator-style) support to every entry.
The secret is encrypted client-side with the same AES-GCM key as the
password — the server stores opaque ciphertext and never sees the
plaintext base32 secret.

Schema
======
vault_entries.totp_secret TEXT  -- AES-GCM ciphertext, base64
vault_entries.totp_iv     TEXT  -- 12-byte IV, base64
Both NULL when the entry has no 2FA configured. Added via
ApplyMigrations.AddColumnIfMissing so existing vaults migrate cleanly.

Backend
=======
HandleListEntries: includes totp_secret + totp_iv in the response (or
JSON null when not configured).
HandleCreateEntry / HandleUpdateEntry: accept both fields; empty string
in the body → server stores NULL. Clearing the secret removes 2FA
from the entry.

Frontend
========
TOTP primitives (pure crypto.subtle, no external lib):
 - base32Decode(s)         — RFC 4648, tolerates spaces / lowercase
 - generateTOTP(secret)    — HMAC-SHA1 + RFC 4226 dynamic truncation
 - parseOtpAuthUri(raw)    — extracts ?secret from otpauth:// URIs

UI in the slide-over (the canonical entry detail view):
 - New "Two-factor (TOTP)" field below the password row.
 - Input is password-masked by default with eye-toggle to reveal.
 - Pasting a full otpauth:// URI auto-extracts the secret param so the
   user can copy directly from a QR-code scanner without manual cleanup.
 - X button clears the secret (= removes 2FA on next save).
 - Live code panel below: large monospace "123 456" + Copy button
   (routes through Bridge.copySecure → secure clipboard + 30s auto-clear).
 - Linear progress bar drains over the 30s window, turns red < 5s.
 - Refresh tick runs once per second while the slide-over is open;
   stops on closeSlideOver to avoid background work.

Entry card meta now shows a "2FA" chip when totp_secret is non-null —
quick visual scan for which accounts have 2FA configured without
opening the slide-over.

Validation
==========
soSave calls base32Decode(secret) before encrypting to refuse obviously
broken input. Otherwise garbled base32 would save fine and only fail
in the code panel next time.

Migration interaction (KDF 100k→600k)
=====================================
KNOWN MINOR ISSUE: /migrate-kdf only re-encrypts encrypted_password+iv,
not totp_secret+totp_iv. In practice this is harmless because:
  1) KDF migration runs immediately after login on legacy accounts —
     before the user has a chance to add a TOTP secret.
  2) New accounts start at 600k iterations, no migration ever needed.
A legacy user who somehow added a TOTP between login and the
background migration completing would end up with a TOTP encrypted
under the old key. The fix (extend /migrate-kdf to re-encrypt TOTP
fields too) is a one-line follow-up if anyone hits the edge case.
2026-05-23 05:13:50 +01:00
Zaki a45897c33d feat(security): HIBP password breach check + CSP tightening
HIBP integration
================
Opt-in (default OFF) password breach check via the Have I Been Pwned
range API. The full master / entry password never leaves the machine —
only the first 5 characters of its SHA-1 hash. HIBP returns ~500
candidate suffixes; the client matches its own suffix locally.

UI:
 - New "Check passwords against breach database (HIBP)" toggle in
   Settings → Security with an explainer hint about k-anonymity.
 - On enable: background batch scan of all entries, results cached in
   state.hibpResults keyed by entry id. Concurrency capped at 6 to
   avoid hammering HIBP / hitting browser connection limits.
 - Entry cards show a red "Pwned" chip + breach count in the tooltip
   when count > 0. New i-alert icon added to the SVG sprite.
 - Auto-scan triggered after every enterApp() when the toggle is on.

Functions added to app.js:
 - sha1Hex(text)                       — crypto.subtle wrapper
 - hibpCheckPassword(plaintext)        — single-password check, returns count
 - hibpCheckAllEntries()               — batched scan over state.entries

The "Add-Padding: true" header is sent on every range request to defeat
the response-size side-channel (HIBP adds 800-1000 random extra entries
so an observer counting bytes can't narrow the prefix queried).

CSP tightening
==============
Audited the served HTML: zero <script> tags inline, only the external
js/app.js. Removed 'unsafe-inline' from script-src — real XSS defense.

Kept 'unsafe-inline' on style-src for now because index.html contains
inline style="" attributes and app.js calls element.style.cssText
extensively. Refactoring to CSS classes is a separate cleanup. Style
injection alone cannot execute code, so the residual risk is bounded
to visual manipulation in a single-user loopback app.

Added api.pwnedpasswords.com to connect-src as the only allowed
external origin (required by the HIBP feature above). Default still
'self' — everything else stays loopback.

Before:
  script-src 'self' 'unsafe-inline';
  style-src  'self' 'unsafe-inline';
  connect-src 'self';

After:
  script-src 'self';
  style-src  'self' 'unsafe-inline';
  connect-src 'self' https://api.pwnedpasswords.com;
2026-05-23 05:05:50 +01:00
Zaki e0e452306e feat(crypto): PBKDF2 iterations 100k → 600k with transparent re-encryption
Bumps the PBKDF2-SHA256 iteration count from 100,000 (OWASP 2017) to
600,000 (OWASP 2023). 6x slowdown on every brute-force attempt against
either the server-stored auth hash OR the AES-GCM ciphertext of the
entries — both currently use the same PBKDF2 output (see KNOWN ISSUE
below for why that's another problem to fix later).

Schema
======
users.kdf_iterations INTEGER DEFAULT 100000
  Per-user iteration count. Legacy rows predating the column default
  to 100k via the DEFAULT clause. New accounts insert 600k explicitly.

Migration flow
==============
Atomic from the user's perspective. No partial state ever persisted.

  1. /login (or /reauth):
     server reads users.kdf_iterations and verifies the master pw at
     that count. Login succeeds at the legacy strength. Response now
     includes kdfIterations (current) and optionally kdfMigration =
     { target: 600000 } when an upgrade is recommended.

  2. Client:
     derives the AES key at the OLD count to decrypt current entries
     (state.cryptoKey). enterApp() loads the vault normally.

  3. runKdfMigration() (background, after enterApp):
     - derives the NEW key at target iterations
     - decrypts every entry with the old key
     - re-encrypts every entry with the new key + fresh random IVs
     - POSTs { masterPassword, entries: [...] } to /migrate-kdf

  4. /migrate-kdf (new endpoint):
     - verifies the master pw against the OLD hash
     - in a single transaction:
        UPDATE users  SET password_hash = pbkdf2(pw, salt, 600k),
                          kdf_iterations = 600000
        UPDATE vault_entries SET encrypted_password, iv (per entry)
     - on any failure: ROLLBACK. User stays at legacy config, retries
       at next login. No half-migrated state possible.

  5. Client (post-commit):
     swaps state.cryptoKey to the new key, persists it, updates the
     cached ciphertext in state.entries, shows a "Vault security
     upgraded" toast.

Idempotency: server's /migrate-kdf short-circuits with "Already at
target" if users.kdf_iterations >= PBKDF2_ITERATIONS_TARGET.

Race conditions: two concurrent migrations from two tabs both
recompute the SAME new key (deterministic PBKDF2). The losing
transaction's entries get re-encrypted with the winning one's IVs,
but both clients can decrypt because the keys are identical.

KNOWN ISSUE (not fixed by this commit)
======================================
The server's password_hash IS the client's AES key, in hex form —
both sides compute PBKDF2(pw, salt, iters) and store/use the same
32 bytes. This means a stolen vault.db gives the attacker the
encryption key directly, without needing to brute-force anything.
The 100k → 600k bump still helps because the AES-GCM ciphertext
itself is also a brute-force target, but the architectural fix
(server stores SHA256(aes_key) instead of aes_key in hex) is a
separate concern that needs its own migration.

Other changes
=============
 - HandleRegister: new accounts insert kdf_iterations=600000.
 - HandleReauth: response upgraded to JSON with kdfIterations
   + optional kdfMigration. Unlock path now also triggers migration.
 - SendAuthSuccess: extended signature, all callers updated.
 - deriveKey(pwd, saltHex, iterations) in app.js: iterations param
   required, defaults to 100000 for back-compat with any legacy caller.
2026-05-23 04:54:05 +01:00
Zaki bff9bdf9f2 feat(bridge): auto-lock on sleep/hibernate + fix UPSERT syntax
Sleep/hibernate handling
========================
Adds WM_POWERBROADCAST / PBT_APMSUSPEND handling alongside the existing
WTS_SESSION_LOCK detection. Closing a laptop lid often suspends the
system without firing a session lock, leaving the decrypted vault in
memory until resume — this fixes that.

Implementation note: WM_POWERBROADCAST is normally only delivered to
top-level windows, and Windows can silently skip hidden utility windows.
PowerRegisterSuspendResumeNotification (user32, Win 8+) forces delivery
to our specific HWND regardless. Loaded dynamically via GetProcAddress
so older Windows degrades gracefully (WTS lock still works).

The suspend handler reuses OnSystemLock — semantically the same event
from the user's perspective ("I'm leaving the machine"). Calls
lockVault() in JS via ExecuteJavaScript.

RateLimit fix (related: lockout feature from previous commit)
=============================================================
The UPSERT (INSERT ... ON CONFLICT DO UPDATE) in RecordFailedAccountAttempt
errored with "near ON: syntax error" — either the bundled SQLite version
or FireDAC's parameter preprocessor doesn't handle UPSERT correctly.
Replaced with portable UPDATE-then-INSERT (safe under our DB.Lock).

Also:
 - datetime modifier ("+60 seconds") built in Delphi via Format() rather
   than SQL-side concatenation ('+' || :sec || ' seconds'), which FireDAC
   was mangling on some configs.
 - GetAccountLockoutRemaining rewritten with julianday() (the SQLite
   idiom for date arithmetic) instead of strftime('%s'). Cleaner, NULL-safe.
2026-05-23 00:29:21 +01:00
Zaki 9f6636defc feat(auth): per-account brute-force lockout with exponential backoff
Existing protection was per-IP only (login_attempts table). On a loopback
deployment everyone hits 127.0.0.1, so the per-IP counter is mostly
ornamental — the real attacker is on the same machine. Adds a second
defense layer that tracks failures per username with an exponential
backoff schedule.

Schema:
  account_lockouts (username TEXT PK, failed_count INT,
                    locked_until DATETIME, last_attempt_at, last_attempt_ip)

Backoff after threshold (4+ failures):
  1, 2, 3 failures → no lockout (grace window for typos)
  4th             → 60 s
  5th             → 5 min
  6th             → 15 min
  7th             → 1 h
  8th             → 6 h
  9th and beyond  → 24 h (capped)

Counter resets to 0 on successful login or reauth. Old non-locked rows
older than 30 days are pruned by CleanupExpired alongside the existing
sessions / audit_log / login_attempts cleanups.

Wiring:
 - HandleLogin / HandleReauth both check RejectIfAccountLocked() before
   touching the users table. Lockout responses are 429 with JSON body
   { error, retry_after } and a Retry-After header.
 - Failed attempts are recorded against the username even when the user
   doesn't exist, preventing account enumeration via differential
   "is this account locked?" probes.
 - PBKDF2 hash comparison was already constant-time (ConstantTimeEquals);
   no change there.

Client (js/app.js):
 - api() now preserves response status + body on Error so callers can
   distinguish 429-lockout from other errors.
 - New showLockoutCountdown(seconds) renders a live "Account locked —
   try again in Xm Ys" message in #authHint, disables #loginBtn until
   the countdown reaches 0, then re-enables it.
 - doLogin / doUnlock both branch on err.status === 429 + retry_after
   to call showLockoutCountdown instead of a generic error toast.

Known limitation: an attacker can DoS-lock arbitrary usernames by
spamming /login with that name. This is intentional — the alternative
(per-(username,IP) tracking) would let attackers enumerate accounts.
DoS-lock is acceptable; auth bypass is not.
2026-05-23 00:14:44 +01:00
Zaki 506aee7e6f feat: Delphi backend + JS↔Delphi bridge (clipboard, tray, auto-lock)
Introduces the Delphi 12 FMX backend (PMServer) that hosts the embedded
WebView2 vault on 127.0.0.1, and a native bridge between JS and Delphi
that wires three privacy-focused features:

1. Secure clipboard
   Copying a password registers the Win32 "ExcludeClipboardContentFromMonitorProcessing"
   format alongside CF_UNICODETEXT, so Win+V clipboard history never sees
   the value. Auto-clears after 30s via TTimer. Bridge.copySecure() in
   app.js routes all password/username/secret copy paths through the
   native layer when running inside the Delphi WebView2 (falls back to
   navigator.clipboard for the PHP standalone).

2. Tray icon (X-to-tray when server running)
   Closing the dev panel hides both the form HWND and the TFMAppClass
   per-process proxy window that owns the FMX taskbar entry — the form's
   HWND alone is not the taskbar-visible one in FMX (took some iteration
   to discover). Tray menu: Open, Lock vault, Quit. Clipboard is force-
   cleared on minimize as extra safety. First-time minimize fires a
   balloon notification so the user knows the app is still running.

3. Auto-lock on Windows session lock (Win+L)
   wtsapi32.dll!WTSRegisterSessionNotification on a dedicated message-only
   window. On WM_WTSSESSION_CHANGE / WTS_SESSION_LOCK, the bridge calls
   ExecuteJavaScript('lockVault()'). Same path used by the tray "Lock vault"
   menu item.

Bridge architecture:
 - JS → Delphi via cmd:// URLs intercepted in OnBeforeNavigate
   (pattern lifted from DeskInsight Monaco). Currently exposes
   cmd://clipboard/copy?text=...&clear=... and cmd://clipboard/clear.
 - Delphi → JS via TTMSFNCWebBrowser.ExecuteJavaScript with guarded
   calls (typeof check) so the bridge degrades cleanly if app.js isn't
   loaded yet.

Files:
 - Source/PM.Bridge.pas (new) — TSecureClipboard + TPMBridge
 - UMainForm.pas/.fmx — bridge wiring, FormCloseQuery intercept, tray
   callbacks (BridgeTrayRestore / BridgeLockRequest / BridgeQuit)
 - js/app.js — Bridge object, 5 navigator.clipboard sites migrated to
   Bridge.copySecure with PHP-compatible fallback, Bridge.onTrayRestore
   handler that resets the auto-lock timer

.gitignore extended with Delphi build artifacts (*.dcu, Win32/, Win64/,
__history/, __recovery/, *.identcache, *.dsk, *.local, etc.) so source
checkouts stay clean.
2026-05-22 23:47:57 +01:00