#8 add app lock with passcode and biometric unlock
- Gate every layer behind AppLockView when the lock is enabled and lock on launch and on backgrounding; the passcode lives only in the Keychain (AppLockVault) and the enable state defaults to off. - Add the lock section to Settings: enable/setup, change passcode and disable all require the current passcode via a shared passcode sheet; Face ID / Touch ID unlock prompts automatically and can be toggled with passcode confirmation. - Add NSFaceIDUsageDescription to both app targets, cover the passcode policy with tests, guard the feature in verify.sh and document it in SECURITY.md.
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import LocalAuthentication
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import SwiftUI
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@MainActor
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struct AppLockView: View {
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@ObservedObject var model: AppModel
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@State private var passcode = ""
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@State private var attemptFailed = false
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@FocusState private var isFocused: Bool
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var body: some View {
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ZStack {
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LinearGradient(
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colors: [
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Color(red: 0.08, green: 0.38, blue: 0.78),
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Color(red: 0.12, green: 0.62, blue: 0.96),
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Color(red: 0.44, green: 0.84, blue: 0.96),
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],
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startPoint: .topLeading,
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endPoint: .bottomTrailing
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)
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.ignoresSafeArea()
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VStack(spacing: 22) {
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Image(systemName: "lock.fill")
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.font(.system(size: 44, weight: .semibold))
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.foregroundStyle(.white)
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Text("Luma заблокирован")
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.font(.title2.weight(.bold))
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.foregroundStyle(.white)
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SecureField("Пароль", text: $passcode)
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.focused($isFocused)
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.textContentType(.password)
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#if os(iOS)
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.textInputAutocapitalization(.never)
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#endif
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.autocorrectionDisabled()
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.textFieldStyle(.roundedBorder)
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.multilineTextAlignment(.center)
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.frame(maxWidth: 260)
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.onSubmit(submit)
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if attemptFailed {
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Text("Неверный пароль")
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.font(.caption.weight(.medium))
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.foregroundStyle(.white.opacity(0.95))
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}
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Button(action: submit) {
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Text("Разблокировать")
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.fontWeight(.semibold)
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.frame(maxWidth: 260)
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.frame(height: 34)
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}
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.buttonStyle(.borderedProminent)
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.disabled(passcode.isEmpty)
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if biometricAvailable, model.appLockBiometricIsEnabled {
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Button {
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Task { await biometricUnlock() }
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} label: {
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Label("Войти по \(biometricName)", systemImage: biometricIcon)
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.foregroundStyle(.white)
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}
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}
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}
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.padding(28)
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.background(.regularMaterial, in: RoundedRectangle(cornerRadius: 28, style: .continuous))
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.padding(24)
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}
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.onAppear {
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isFocused = true
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}
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.task {
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// Auto-prompt biometrics once when the lock screen appears.
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guard biometricAvailable, model.appLockBiometricIsEnabled else { return }
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await biometricUnlock()
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}
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}
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private var biometricContext: LAContext {
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LAContext()
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}
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private var biometricAvailable: Bool {
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var error: NSError?
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return biometricContext.canEvaluatePolicy(
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.deviceOwnerAuthenticationWithBiometrics,
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error: &error
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)
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}
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private var biometryType: LABiometryType {
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biometricContext.biometryType
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}
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private var biometricIcon: String {
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biometryType == .faceID ? "faceid" : "touchid"
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}
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private var biometricName: String {
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biometryType == .faceID ? "Face ID" : "Touch ID"
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}
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private func submit() {
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guard !passcode.isEmpty else { return }
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if model.unlockWithPasscode(passcode) {
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attemptFailed = false
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passcode = ""
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} else {
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attemptFailed = true
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passcode = ""
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}
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}
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private func biometricUnlock() async {
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_ = await model.unlockWithBiometrics()
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}
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}
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/// Configurable passcode sheet: setting up a new passcode, changing it, or
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/// verifying the current one to disable the lock / toggle biometrics.
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@MainActor
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struct AppLockPasscodeSheet: View {
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enum Mode: Identifiable {
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case setup
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case change
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case verify(VerificationAction)
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enum VerificationAction: String {
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case disableLock
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case enableBiometrics
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case disableBiometrics
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}
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var id: String {
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switch self {
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case .setup: return "setup"
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case .change: return "change"
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case .verify(let action): return "verify-\(action.rawValue)"
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}
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}
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}
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let model: AppModel
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let mode: Mode
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@Environment(\.dismiss) private var dismiss
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@State private var oldPasscode = ""
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@State private var passcode = ""
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@State private var repeatedPasscode = ""
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@State private var errorText: String?
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var body: some View {
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NavigationStack {
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Form {
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if needsOldPasscode {
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Section("Текущий пароль") {
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SecureField("Текущий пароль", text: $oldPasscode)
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.textContentType(.password)
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}
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}
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Section(title) {
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SecureField(fieldLabel, text: $passcode)
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.textContentType(.password)
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if needsRepeatedPasscode {
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SecureField("Повторите пароль", text: $repeatedPasscode)
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.textContentType(.password)
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}
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}
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if let errorText {
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Section {
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Text(errorText)
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.font(.caption)
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.foregroundStyle(.red)
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}
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}
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}
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.navigationTitle(navigationTitle)
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.toolbar {
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ToolbarItem(placement: .cancellationAction) {
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Button("Отмена") { dismiss() }
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}
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ToolbarItem(placement: .confirmationAction) {
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Button("Готово", action: submit)
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.disabled(!canSubmit)
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}
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}
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}
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#if os(macOS)
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.frame(minWidth: 420, minHeight: 320)
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#endif
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}
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private var needsOldPasscode: Bool {
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switch mode {
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case .change, .verify:
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return true
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case .setup:
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return false
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}
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}
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private var needsRepeatedPasscode: Bool {
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switch mode {
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case .setup, .change:
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return true
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case .verify:
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return false
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}
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}
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private var title: String {
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switch mode {
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case .setup: return "Новый пароль"
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case .change: return "Новый пароль"
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case .verify: return "Пароль"
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}
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}
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private var navigationTitle: String {
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switch mode {
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case .setup: return "Включить блокировку"
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case .change: return "Сменить пароль"
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case .verify(let action):
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switch action {
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case .disableLock: return "Выключить блокировку"
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case .enableBiometrics, .disableBiometrics: return "Подтвердите пароль"
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}
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}
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}
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private var fieldLabel: String {
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switch mode {
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case .setup, .change: return "Пароль (минимум \(AppLockPolicy.minimumLength) символа)"
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case .verify: return "Пароль"
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}
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}
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private var canSubmit: Bool {
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switch mode {
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case .setup:
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return !passcode.isEmpty && !repeatedPasscode.isEmpty
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case .change:
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return !oldPasscode.isEmpty && !passcode.isEmpty && !repeatedPasscode.isEmpty
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case .verify:
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return !oldPasscode.isEmpty
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}
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}
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private func submit() {
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errorText = nil
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switch mode {
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case .setup:
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guard AppLockPolicy.isValid(passcode) else {
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errorText = "Пароль слишком короткий: минимум \(AppLockPolicy.minimumLength) символа."
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return
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}
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guard passcode == repeatedPasscode else {
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errorText = "Пароли не совпадают."
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repeatedPasscode = ""
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return
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}
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if model.enableAppLock(passcode: passcode) {
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dismiss()
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} else {
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errorText = model.errorMessage ?? "Не удалось включить блокировку."
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}
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case .change:
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guard AppLockPolicy.isValid(passcode) else {
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errorText = "Пароль слишком короткий: минимум \(AppLockPolicy.minimumLength) символа."
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return
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}
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guard passcode == repeatedPasscode else {
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errorText = "Пароли не совпадают."
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repeatedPasscode = ""
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return
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}
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if model.changeAppLockPasscode(from: oldPasscode, to: passcode) {
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dismiss()
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} else {
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errorText = "Неверный текущий пароль."
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oldPasscode = ""
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}
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case .verify(let action):
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switch action {
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case .disableLock:
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if model.disableAppLock(passcode: oldPasscode) {
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dismiss()
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} else {
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errorText = "Неверный пароль."
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oldPasscode = ""
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}
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case .enableBiometrics:
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if model.setAppLockBiometricUnlock(true, passcode: oldPasscode) {
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dismiss()
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} else {
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errorText = "Неверный пароль."
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oldPasscode = ""
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}
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case .disableBiometrics:
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if model.setAppLockBiometricUnlock(false, passcode: oldPasscode) {
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dismiss()
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} else {
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errorText = "Неверный пароль."
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oldPasscode = ""
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}
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}
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}
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}
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}
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