Keypass

Passkey-derived encryption material for Dart, without Flutter.

Use an OS passkey provider or a physical FIDO2 key to create a credential and recover the same 32-byte secret later. Keypass handles verification and native interaction; your app owns encryption, storage and recovery. No Keypass service or account is required.

Prerelease: 0.1.0-dev.3. Provider/device coverage is limited; see platform setup. Source changes since publication are listed in the changelog.

Create and unlock

import 'package:keypass/keypass.dart';

final passkeys = Keypass.system(rpId: 'vault.example.com');
final created = await passkeys.create(label: 'Personal vault');
try {
  // Derive a wrapping key from created.secret.
  // Save created.record.toJson() with your authenticated encrypted envelope.
} finally {
  created.dispose();
}

Later, use the saved record to select the same credential:

final opened = await passkeys.unlock(PasskeyRecord.fromJson(savedRecordJson));
try {
  // Authenticate and decrypt the saved envelope using opened.secret.
  // Atomically save opened.record.toJson() before exposing the result.
} finally {
  opened.dispose();
}

The record is nonsecret recovery metadata; it needs integrity protection. These sketches leave encryption and persistence to your app. See the SDK guide for the full contract and an executable example. Always dispose results; clear your own derived keys and secret copies too.

Choose a route

An RP ID scopes credentials; it can have many saved records. Direct hardware namespaces do not authenticate the calling executable. Windows system support is experimental and lacks Apple/Android-style domain association.

Desktop USB adapters use Dart build hooks; build hosts need the listed native prerequisites. Mobile and OS-provider hosts need explicit native setup. The browser probe is research, outside the public SDK.

check() optionally reports prompt-free readiness, not PRF support. To cancel, use PasskeyCancellation, await settlement and dispose any successful result; Future.timeout alone does not cancel native work.

Documentation

• SDK usage · Platform setup
• Security · External review
• Keybay integration · Roadmap

Review and development

Requires Dart 3.11+, Node 22+ and the native prerequisites.

dart pub get --enforce-lockfile
dart analyze --fatal-infos
dart test

CI defines formatting, browser and native checks. Physical demos use disposable data and attended credentials. MIT licensed.