[ { "path": ".gitignore", "content": "## System\n.DS_Store\n\n## Build generated\nbuild/\nDerivedData\nNuke.xcodeproj/xcshareddata/xcbaselines/\n\n## Various settings\n*.pbxuser\n!default.pbxuser\n*.mode1v3\n!default.mode1v3\n*.mode2v3\n!default.mode2v3\n*.perspectivev3\n!default.perspectivev3\nxcuserdata\n\n## Other\n*.xccheckout\n*.moved-aside\n*.xcuserstate\n*.xcscmblueprint\n\n## Obj-C/Swift specific\n*.hmap\n*.ipa\n\n## Playgrounds\ntimeline.xctimeline\nplayground.xcworkspace\n\n\n## Swift Package Manager\n#\n# Add this line if you want to avoid checking in source code from Swift Package Manager dependencies.\n# Packages/\n\n.build/\n\n\n## CocoaPods\n#\n# We recommend against adding the Pods directory to your .gitignore. However\n# you should judge for yourself, the pros and cons are mentioned at:\n# https://guides.cocoapods.org/using/using-cocoapods.html#should-i-check-the-pods-directory-into-source-control\n#\n\nPods/\n\n\n## Carthage\n#\n# Add this line if you want to avoid checking in source code from Carthage dependencies.\n\nCarthage\n" }, { "path": "README.md", "content": "# VPN (WIP)\n\nA sample VPN client/server written in Swift.\n\n# License\n\nVPN is available under the MIT license. See the LICENSE file for more info.\n" }, { "path": "vpn-client/AppDelegate.swift", "content": "// The MIT License (MIT)\n//\n// Copyright (c) 2020 Alexander Grebenyuk (github.com/kean).\n\nimport UIKit\n\n@UIApplicationMain\nclass AppDelegate: UIResponder, UIApplicationDelegate {\n\n\n\n func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {\n // Override point for customization after application launch.\n return true\n }\n\n // MARK: UISceneSession Lifecycle\n\n func application(_ application: UIApplication, configurationForConnecting connectingSceneSession: UISceneSession, options: UIScene.ConnectionOptions) -> UISceneConfiguration {\n // Called when a new scene session is being created.\n // Use this method to select a configuration to create the new scene with.\n return UISceneConfiguration(name: \"Default Configuration\", sessionRole: connectingSceneSession.role)\n }\n\n func application(_ application: UIApplication, didDiscardSceneSessions sceneSessions: Set) {\n // Called when the user discards a scene session.\n // If any sessions were discarded while the application was not running, this will be called shortly after application:didFinishLaunchingWithOptions.\n // Use this method to release any resources that were specific to the discarded scenes, as they will not return.\n }\n\n\n}\n\n" }, { "path": "vpn-client/Assets.xcassets/AppIcon.appiconset/Contents.json", "content": "{\n \"images\" : [\n {\n \"idiom\" : \"iphone\",\n \"scale\" : \"2x\",\n \"size\" : \"20x20\"\n },\n {\n \"idiom\" : \"iphone\",\n \"scale\" : \"3x\",\n \"size\" : \"20x20\"\n },\n {\n \"idiom\" : \"iphone\",\n \"scale\" : \"2x\",\n \"size\" : \"29x29\"\n },\n {\n \"idiom\" : \"iphone\",\n \"scale\" : \"3x\",\n \"size\" : \"29x29\"\n },\n {\n \"idiom\" : \"iphone\",\n \"scale\" : \"2x\",\n \"size\" : \"40x40\"\n },\n {\n \"idiom\" : \"iphone\",\n \"scale\" : \"3x\",\n \"size\" : \"40x40\"\n },\n {\n \"idiom\" : \"iphone\",\n \"scale\" : \"2x\",\n \"size\" : \"60x60\"\n },\n {\n \"idiom\" : \"iphone\",\n \"scale\" : \"3x\",\n \"size\" : \"60x60\"\n },\n {\n \"idiom\" : \"ipad\",\n \"scale\" : \"1x\",\n \"size\" : \"20x20\"\n },\n {\n \"idiom\" : \"ipad\",\n \"scale\" : \"2x\",\n \"size\" : \"20x20\"\n },\n {\n \"idiom\" : \"ipad\",\n \"scale\" : \"1x\",\n \"size\" : \"29x29\"\n },\n {\n \"idiom\" : \"ipad\",\n \"scale\" : \"2x\",\n \"size\" : \"29x29\"\n },\n {\n \"idiom\" : \"ipad\",\n \"scale\" : \"1x\",\n \"size\" : \"40x40\"\n },\n {\n \"idiom\" : \"ipad\",\n \"scale\" : \"2x\",\n \"size\" : \"40x40\"\n },\n {\n \"idiom\" : \"ipad\",\n \"scale\" : \"1x\",\n \"size\" : \"76x76\"\n },\n {\n \"idiom\" : \"ipad\",\n \"scale\" : \"2x\",\n \"size\" : \"76x76\"\n },\n {\n \"idiom\" : \"ipad\",\n \"scale\" : \"2x\",\n \"size\" : \"83.5x83.5\"\n },\n {\n \"idiom\" : \"ios-marketing\",\n \"scale\" : \"1x\",\n \"size\" : \"1024x1024\"\n }\n ],\n \"info\" : {\n \"author\" : \"xcode\",\n \"version\" : 1\n }\n}\n" }, { "path": "vpn-client/Assets.xcassets/Contents.json", "content": "{\n \"info\" : {\n \"author\" : \"xcode\",\n \"version\" : 1\n }\n}\n" }, { "path": "vpn-client/Assets.xcassets/icon-vpn.imageset/Contents.json", "content": "{\n \"images\" : [\n {\n \"filename\" : \"icons8-vpn-status-bar-icon-50.png\",\n \"idiom\" : \"universal\",\n \"scale\" : \"1x\"\n },\n {\n \"filename\" : \"icons8-vpn-status-bar-icon-100.png\",\n \"idiom\" : \"universal\",\n \"scale\" : \"2x\"\n },\n {\n \"filename\" : \"icons8-vpn-status-bar-icon-101.png\",\n \"idiom\" : \"universal\",\n \"scale\" : \"3x\"\n }\n ],\n \"info\" : {\n \"author\" : \"xcode\",\n \"version\" : 1\n },\n \"properties\" : {\n \"template-rendering-intent\" : \"template\"\n }\n}\n" }, { "path": "vpn-client/Base.lproj/LaunchScreen.storyboard", "content": "\n\n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n\n" }, { "path": "vpn-client/Info.plist", "content": "\n\n\n\n\tCFBundleDevelopmentRegion\n\t$(DEVELOPMENT_LANGUAGE)\n\tCFBundleExecutable\n\t$(EXECUTABLE_NAME)\n\tCFBundleIdentifier\n\t$(PRODUCT_BUNDLE_IDENTIFIER)\n\tCFBundleInfoDictionaryVersion\n\t6.0\n\tCFBundleName\n\t$(PRODUCT_NAME)\n\tCFBundlePackageType\n\t$(PRODUCT_BUNDLE_PACKAGE_TYPE)\n\tCFBundleShortVersionString\n\t1.0\n\tCFBundleVersion\n\t1\n\tLSRequiresIPhoneOS\n\t\n\tUIApplicationSceneManifest\n\t\n\t\tUIApplicationSupportsMultipleScenes\n\t\t\n\t\tUISceneConfigurations\n\t\t\n\t\t\tUIWindowSceneSessionRoleApplication\n\t\t\t\n\t\t\t\t\n\t\t\t\t\tUISceneConfigurationName\n\t\t\t\t\tDefault Configuration\n\t\t\t\t\tUISceneDelegateClassName\n\t\t\t\t\t$(PRODUCT_MODULE_NAME).SceneDelegate\n\t\t\t\t\n\t\t\t\n\t\t\n\t\n\tUILaunchStoryboardName\n\tLaunchScreen\n\tUIRequiredDeviceCapabilities\n\t\n\t\tarmv7\n\t\n\tUISupportedInterfaceOrientations\n\t\n\t\tUIInterfaceOrientationPortrait\n\t\tUIInterfaceOrientationLandscapeLeft\n\t\tUIInterfaceOrientationLandscapeRight\n\t\n\tUISupportedInterfaceOrientations~ipad\n\t\n\t\tUIInterfaceOrientationPortrait\n\t\tUIInterfaceOrientationPortraitUpsideDown\n\t\tUIInterfaceOrientationLandscapeLeft\n\t\tUIInterfaceOrientationLandscapeRight\n\t\n\n\n" }, { "path": "vpn-client/Preview Content/Preview Assets.xcassets/Contents.json", "content": "{\n \"info\" : {\n \"author\" : \"xcode\",\n \"version\" : 1\n }\n}\n" }, { "path": "vpn-client/SceneDelegate.swift", "content": "// The MIT License (MIT)\n//\n// Copyright (c) 2020 Alexander Grebenyuk (github.com/kean).\n\nimport UIKit\nimport SwiftUI\n\nclass SceneDelegate: UIResponder, UIWindowSceneDelegate {\n\n var window: UIWindow?\n\n\n func scene(_ scene: UIScene, willConnectTo session: UISceneSession, options connectionOptions: UIScene.ConnectionOptions) {\n // Use this method to optionally configure and attach the UIWindow `window` to the provided UIWindowScene `scene`.\n // If using a storyboard, the `window` property will automatically be initialized and attached to the scene.\n // This delegate does not imply the connecting scene or session are new (see `application:configurationForConnectingSceneSession` instead).\n\n // Create the SwiftUI view that provides the window contents.\n let contentView = RouterView()\n\n // Use a UIHostingController as window root view controller.\n if let windowScene = scene as? UIWindowScene {\n let window = UIWindow(windowScene: windowScene)\n window.rootViewController = UIHostingController(rootView: contentView)\n self.window = window\n window.makeKeyAndVisible()\n }\n }\n\n func sceneDidDisconnect(_ scene: UIScene) {\n // Called as the scene is being released by the system.\n // This occurs shortly after the scene enters the background, or when its session is discarded.\n // Release any resources associated with this scene that can be re-created the next time the scene connects.\n // The scene may re-connect later, as its session was not neccessarily discarded (see `application:didDiscardSceneSessions` instead).\n }\n\n func sceneDidBecomeActive(_ scene: UIScene) {\n // Called when the scene has moved from an inactive state to an active state.\n // Use this method to restart any tasks that were paused (or not yet started) when the scene was inactive.\n }\n\n func sceneWillResignActive(_ scene: UIScene) {\n // Called when the scene will move from an active state to an inactive state.\n // This may occur due to temporary interruptions (ex. an incoming phone call).\n }\n\n func sceneWillEnterForeground(_ scene: UIScene) {\n // Called as the scene transitions from the background to the foreground.\n // Use this method to undo the changes made on entering the background.\n }\n\n func sceneDidEnterBackground(_ scene: UIScene) {\n // Called as the scene transitions from the foreground to the background.\n // Use this method to save data, release shared resources, and store enough scene-specific state information\n // to restore the scene back to its current state.\n }\n\n\n}\n\n" }, { "path": "vpn-client/Screens/PrimaryButton.swift", "content": "// The MIT License (MIT)\n//\n// Copyright (c) 2020 Alexander Grebenyuk (github.com/kean).\n\nimport SwiftUI\n\nstruct PrimaryButton: View {\n let title: String\n let action: () -> Void\n @Binding var isLoading: Bool\n\n var body: some View {\n Button(action: self.action) {\n ZStack {\n Spinner(isAnimating: $isLoading, color: .white, style: .medium)\n Text(title)\n .opacity(isLoading ? 0 : 1)\n }\n }\n .disabled(isLoading)\n .padding()\n .frame(maxWidth: .infinity)\n .foregroundColor(Color.white)\n .background(Color.blue)\n .cornerRadius(8)\n }\n}\n\nstruct PrimaryButtonView_Previews: PreviewProvider {\n static var previews: some View {\n Group {\n PrimaryButton(title: \"Action\", action: {}, isLoading: .constant(false))\n .previewLayout(.fixed(width: 300, height: 80))\n\n PrimaryButton(title: \"Action\", action: {}, isLoading: .constant(false))\n .previewLayout(.fixed(width: 300, height: 80))\n .environment(\\.colorScheme, .dark)\n\n PrimaryButton(title: \"Action\", action: {}, isLoading: .constant(true))\n .previewLayout(.fixed(width: 300, height: 80))\n }\n }\n}\n" }, { "path": "vpn-client/Screens/PrimaryButtonView.swift", "content": "// The MIT License (MIT)\n//\n// Copyright (c) 2020 Alexander Grebenyuk (github.com/kean).\n\nimport SwiftUI\n\nstruct PrimaryButton: View {\n let title: String\n let action: () -> Void\n @Binding var isLoading: Bool\n\n var body: some View {\n Button(action: self.action) {\n ZStack {\n Spinner(isAnimating: .constant(true), style: .medium)\n Text(title)\n }\n }\n .padding()\n .foregroundColor(Color.white)\n .background(Color.blue)\n .cornerRadius(8)\n }\n}\n\nstruct PrimaryButtonView_Previews: PreviewProvider {\n static var previews: some View {\n Group {\n PrimaryButton(title: \"Action\", action: {}, isLoading: .constant(false))\n .previewLayout(.fixed(width: 300, height: 80))\n\n PrimaryButton(title: \"Action\", action: {}, isLoading: .constant(false))\n .previewLayout(.fixed(width: 300, height: 80))\n .environment(\\.colorScheme, .dark)\n\n PrimaryButton(title: \"Action\", action: {}, isLoading: .constant(true))\n .previewLayout(.fixed(width: 300, height: 80))\n }\n }\n}\n" }, { "path": "vpn-client/Screens/RouterView.swift", "content": "// The MIT License (MIT)\n//\n// Copyright (c) 2020 Alexander Grebenyuk (github.com/kean).\n\nimport SwiftUI\n\nstruct RouterView: View {\n @ObservedObject var service: VPNConfigurationService = .shared\n\n var body: some View {\n if !service.isStarted {\n return AnyView(SplashView())\n } else {\n if let tunnel = service.tunnel {\n return AnyView(TunnelDetailsView(model: TunnelViewModel(tunnel: tunnel)))\n } else {\n return AnyView(WelcomeView())\n }\n }\n }\n}\n\nstruct RouterView_Previews: PreviewProvider {\n static var previews: some View {\n RouterView()\n }\n}\n" }, { "path": "vpn-client/Screens/Spinner.swift", "content": "// The MIT License (MIT)\n//\n// Copyright (c) 2020 Alexander Grebenyuk (github.com/kean).\n\nimport SwiftUI\nimport UIKit\n\nstruct Spinner: UIViewRepresentable {\n @Binding var isAnimating: Bool\n\n let color: UIColor\n let style: UIActivityIndicatorView.Style\n\n func makeUIView(context: Context) -> UIActivityIndicatorView {\n let indicator = UIActivityIndicatorView(style: style)\n indicator.hidesWhenStopped = true\n indicator.color = color\n return indicator\n }\n\n func updateUIView(_ uiView: UIActivityIndicatorView, context: Context) {\n isAnimating ? uiView.startAnimating() : uiView.stopAnimating()\n }\n}\n" }, { "path": "vpn-client/Screens/SplashView.swift", "content": "// The MIT License (MIT)\n//\n// Copyright (c) 2020 Alexander Grebenyuk (github.com/kean).\n\nimport SwiftUI\nimport NetworkExtension\n\nstruct SplashView: View {\n @ObservedObject var service: VPNConfigurationService = .shared\n\n @State private var isLoading = false\n @State private var isShowingError = false\n @State private var errorMessage = \"\"\n\n var body: some View {\n VStack {\n Text(\"BestVPN\")\n .font(.largeTitle)\n .fontWeight(.heavy)\n Spacer().frame(height: 32)\n HStack {\n Text(\"Loading profiles…\")\n Spinner(isAnimating: $isLoading, color: .label, style: .medium)\n }\n }\n .onAppear(perform: refresh)\n .alert(isPresented: $isShowingError) {\n Alert(\n title: Text(\"Failed to load profiles\"),\n message: Text(errorMessage),\n primaryButton: .default(Text(\"Retry\"), action: refresh),\n secondaryButton: .cancel()\n )\n }\n }\n\n private func refresh() {\n isLoading = true\n service.refresh {\n self.isLoading = false\n switch $0 {\n case .success:\n break // Handled by RouterView\n case let .failure(error):\n self.errorMessage = error.localizedDescription\n self.isShowingError = true\n }\n }\n }\n}\n\nstruct SplashView_Previews: PreviewProvider {\n static var previews: some View {\n SplashView()\n }\n}\n" }, { "path": "vpn-client/Screens/TunnelDetails/TunnelDetailsView.swift", "content": "// The MIT License (MIT)\n//\n// Copyright (c) 2020 Alexander Grebenyuk (github.com/kean).\n\nimport SwiftUI\n\nstruct TunnelDetailsView: View {\n @ObservedObject var model: TunnelViewModel\n\n var body: some View {\n NavigationView {\n Form {\n Section(header: Text(\"Settings\")) {\n TextInputView(title: \"Username\", text: $model.username)\n TextInputView(title: \"Password\", text: $model.password)\n TextInputView(title: \"Server\", text: $model.server)\n Button(action: model.buttonSaveTapped) { Text(\"Save\") }\n .foregroundColor(Color.blue)\n }\n Section(header: Text(\"Status\")) {\n Toggle(isOn: $model.isEnabled, label: { Text(\"Enabled\") })\n if model.isEnabled {\n Text(\"Status: \") + Text(model.status).bold()\n if model.isStarted {\n Button(action: model.buttonStopTapped) { Text(\"Stop\") }\n .foregroundColor(Color.orange)\n } else {\n Button(action: model.buttonStartTapped) { Text(\"Start\") }\n .foregroundColor(Color.blue)\n }\n }\n }\n Section {\n ButtonRemoveProfile(model: model)\n }\n }\n .disabled(model.isLoading)\n .alert(isPresented: $model.isShowingError) {\n Alert(\n title: Text(self.model.errorTitle),\n message: Text(self.model.errorMessage),\n dismissButton: .cancel()\n )\n }\n .navigationBarItems(trailing:\n Spinner(isAnimating: $model.isLoading, color: .label, style: .medium)\n )\n .navigationBarTitle(\"VPN Status\")\n }\n }\n}\n\nprivate struct TextInputView: View {\n let title: String\n let text: Binding\n\n var body: some View {\n HStack(alignment: .center) {\n Text(title)\n .font(.callout)\n TextField(title, text: text)\n .multilineTextAlignment(.trailing)\n .foregroundColor(Color.gray)\n }\n }\n}\n\nprivate struct ButtonRemoveProfile: View {\n let model: TunnelViewModel\n\n @State private var isConfirmationPresented = false\n\n var body: some View {\n Button(action: {\n self.isConfirmationPresented = true\n }) {\n Text(\"Remove Profile\")\n }\n .foregroundColor(.red)\n .alert(isPresented: $isConfirmationPresented) {\n Alert(\n title: Text(\"Are you sure you want to remove the profile?\"),\n primaryButton: .destructive(Text(\"Remove profile\"), action: {\n self.isConfirmationPresented = false\n self.model.buttonRemoveProfileTapped()\n }),\n secondaryButton: .cancel()\n )\n }\n }\n}\n\nstruct TunnelView_Previews: PreviewProvider {\n static var previews: some View {\n TunnelDetailsView(model: .init(tunnel: .init()))\n }\n}\n" }, { "path": "vpn-client/Screens/TunnelDetails/TunnelDetailsViewModel.swift", "content": "// The MIT License (MIT)\n//\n// Copyright (c) 2020 Alexander Grebenyuk (github.com/kean).\n\nimport SwiftUI\nimport Combine\nimport NetworkExtension\n\nfinal class TunnelViewModel: ObservableObject {\n @Published var username = \"\"\n @Published var password = \"\"\n @Published var server = \"\"\n\n @Published var isEnabled = false\n @Published var isStarted = false\n\n @Published private(set) var status: String = \"Unknown\"\n\n @Published var isLoading = false\n @Published var isShowingError = false\n @Published private(set) var errorTitle = \"\"\n @Published private(set) var errorMessage = \"\"\n\n private let service: VPNConfigurationService\n private let tunnel: NETunnelProviderManager\n\n private var observers = [AnyObject]()\n private var bag = [AnyCancellable]()\n\n init(service: VPNConfigurationService = .shared, tunnel: NETunnelProviderManager) {\n self.service = service\n self.tunnel = tunnel\n\n self.refresh()\n\n observers.append(NotificationCenter.default\n .addObserver(forName: .NEVPNStatusDidChange, object: tunnel.connection, queue: .main) { [weak self] _ in\n self?.refresh()\n })\n\n observers.append(NotificationCenter.default\n .addObserver(forName: .NEVPNConfigurationChange, object: tunnel, queue: .main) { [weak self] _ in\n self?.refresh()\n })\n\n $isEnabled.sink { [weak self] in\n self?.setEnabled($0)\n }.store(in: &bag)\n }\n\n private func refresh() {\n self.status = tunnel.connection.status.description\n let username = tunnel.protocolConfiguration?.username ?? \"\"\n self.username = username\n self.password = tunnel.protocolConfiguration?.passwordReference.flatMap {\n Keychain.password(for: username, reference: $0)\n } ?? \"\"\n self.server = tunnel.protocolConfiguration?.serverAddress ?? \"\"\n self.isEnabled = tunnel.isEnabled\n self.isStarted = tunnel.connection.status != .disconnected && tunnel.connection.status != .invalid\n }\n\n private func setEnabled(_ isEnabled: Bool) {\n guard isEnabled != tunnel.isEnabled else { return }\n tunnel.isEnabled = isEnabled\n saveToPreferences()\n }\n\n func buttonStartTapped() {\n do {\n try tunnel.connection.startVPNTunnel(options: [:] as [String : NSObject])\n } catch {\n self.showError(title: \"Failed to start VPN tunnel\", message: error.localizedDescription)\n }\n }\n\n func buttonStopTapped() {\n tunnel.connection.stopVPNTunnel()\n }\n\n func buttonRemoveProfileTapped() {\n isLoading = true\n\n service.removeProfile { [weak self] in\n guard let self = self else { return }\n self.isLoading = false\n switch $0 {\n case .success:\n break // Do nothing, router will show what's next\n case let .failure(error):\n self.showError(title: \"Failed to install a profile\", message: error.localizedDescription)\n }\n }\n }\n\n private func saveToPreferences() {\n isLoading = true\n tunnel.saveToPreferences { [weak self] error in\n guard let self = self else { return }\n self.isLoading = false\n if let error = error {\n self.showError(title: \"Failed to update VPN configuration\", message: error.localizedDescription)\n self.errorMessage = error.localizedDescription\n return\n }\n }\n }\n\n private func showError(title: String, message: String) {\n self.errorTitle = title\n self.errorMessage = message\n self.isShowingError = true\n }\n\n func buttonSaveTapped() {\n let proto = tunnel.protocolConfiguration as! NETunnelProviderProtocol\n proto.username = self.username\n proto.passwordReference = {\n let keychain = Keychain(group: \"group.com.github.kean.vpn-client\")\n keychain.set(password: self.password, for: username)\n return keychain.passwordReference(for: username)\n }()\n proto.serverAddress = server\n\n tunnel.protocolConfiguration = proto\n\n saveToPreferences()\n }\n\n private func sayHelloToTunnel() {\n // Send a simple IPC message to the provider, handle the response.\n guard let session = tunnel.connection as? NETunnelProviderSession,\n let message = \"Hello Provider\".data(using: String.Encoding.utf8), tunnel.connection.status != .invalid else {\n return\n }\n\n do {\n try session.sendProviderMessage(message) { response in\n if response != nil {\n let responseString = NSString(data: response!, encoding: String.Encoding.utf8.rawValue)\n NSLog(\"Received response from the provider: \\(String(describing: responseString))\")\n } else {\n NSLog(\"Got a nil response from the provider\")\n }\n }\n } catch {\n NSLog(\"Failed to send a message to the provider\")\n }\n }\n}\n" }, { "path": "vpn-client/Screens/WelcomeView.swift", "content": "// The MIT License (MIT)\n//\n// Copyright (c) 2020 Alexander Grebenyuk (github.com/kean).\n\nimport SwiftUI\n\nstruct WelcomeView: View {\n let service: VPNConfigurationService = .shared\n\n @State private var isLoading = false\n @State private var isShowingError = false\n @State private var errorMessage = \"\"\n\n var body: some View {\n NavigationView {\n VStack {\n header\n Spacer(minLength: 0)\n buttonInstall\n Spacer().frame(height: 16)\n }.padding()\n }\n }\n\n private var header: some View {\n VStack {\n Text(\"BestVPN\")\n .font(.largeTitle)\n .fontWeight(.heavy)\n HStack(spacing: 20) {\n Image(\"icon-vpn\")\n .resizable()\n .frame(width: 50, height: 50)\n VStack(alignment: .leading) {\n Text(\"Custom VPN solution\")\n .font(.headline)\n Text(\"Powered by Network Extension and SwiftNIO\")\n }\n }\n }\n }\n\n private var buttonInstall: some View {\n PrimaryButton(\n title: \"Install VPN Profile\",\n action: self.installProfile,\n isLoading: $isLoading\n ).alert(isPresented: $isShowingError) {\n Alert(\n title: Text(\"Failed to install a profile\"),\n message: Text(errorMessage),\n dismissButton: .cancel()\n )\n }\n }\n\n private func installProfile() {\n isLoading = true\n\n service.installProfile { result in\n self.isLoading = false\n switch result {\n case .success:\n break // Do nothing, router will show what's next\n case let .failure(error):\n self.errorMessage = error.localizedDescription\n self.isShowingError = true\n }\n }\n }\n}\n\nstruct WelcomeView_Previews: PreviewProvider {\n static var previews: some View {\n WelcomeView()\n }\n}\n" }, { "path": "vpn-client/Services/Keychain.swift", "content": "// The MIT License (MIT)\n//\n// Copyright (c) 2020 Alexander Grebenyuk (github.com/kean).\n\nimport Foundation\n\n/// Wrapper for easy keychain access and modification.\npublic final class Keychain {\n private let accessGroup: String\n\n public init(group: String) {\n self.accessGroup = group\n }\n\n @discardableResult\n public func set(password: String, for username: String, label: String? = nil) -> OSStatus {\n removePassword(for: username)\n\n var query = [String: Any]()\n query[kSecAttrAccessGroup as String] = accessGroup\n query[kSecClass as String] = kSecClassGenericPassword\n if let label = label {\n query[kSecAttrLabel as String] = label\n }\n query[kSecAttrAccount as String] = username\n query[kSecAttrAccessible as String] = kSecAttrAccessibleAfterFirstUnlock\n query[kSecValueData as String] = password.data(using: .utf8)\n\n return SecItemAdd(query as CFDictionary, nil)\n }\n\n @discardableResult\n public func removePassword(for username: String) -> Bool {\n var query = [String: Any]()\n query[kSecAttrAccessGroup as String] = accessGroup\n query[kSecClass as String] = kSecClassGenericPassword\n query[kSecAttrAccount as String] = username\n\n let status = SecItemDelete(query as CFDictionary)\n return status == errSecSuccess\n }\n\n public func password(for username: String) throws -> String? {\n var query = [String: Any]()\n query[kSecAttrAccessGroup as String] = accessGroup\n query[kSecClass as String] = kSecClassGenericPassword\n query[kSecAttrAccount as String] = username\n query[kSecMatchLimit as String] = kSecMatchLimitOne\n query[kSecReturnData as String] = true\n\n var result: AnyObject?\n let status = SecItemCopyMatching(query as CFDictionary, &result)\n guard status == errSecSuccess, let data = result as? Data else {\n return nil\n }\n return String(data: data, encoding: .utf8)\n }\n\n public func passwordReference(for username: String) -> Data? {\n var query = [String: Any]()\n query[kSecAttrAccessGroup as String] = accessGroup\n query[kSecClass as String] = kSecClassGenericPassword\n query[kSecAttrAccount as String] = username\n query[kSecMatchLimit as String] = kSecMatchLimitOne\n query[kSecReturnPersistentRef as String] = true\n\n var result: AnyObject?\n let status = SecItemCopyMatching(query as CFDictionary, &result)\n guard status == errSecSuccess, let data = result as? Data else {\n return nil\n }\n return data\n }\n\n public static func password(for username: String, reference: Data) -> String? {\n var query = [String: Any]()\n query[kSecClass as String] = kSecClassGenericPassword\n query[kSecAttrAccount as String] = username\n query[kSecMatchItemList as String] = [reference]\n query[kSecReturnData as String] = true\n\n var result: AnyObject?\n let status = SecItemCopyMatching(query as CFDictionary, &result)\n guard status == errSecSuccess, let data = result as? Data else {\n return nil\n }\n return String(data: data, encoding: .utf8)\n }\n}\n" }, { "path": "vpn-client/Services/VPNConfigurationService.swift", "content": "// The MIT License (MIT)\n//\n// Copyright (c) 2020 Alexander Grebenyuk (github.com/kean).\n\nimport Foundation\nimport Combine\nimport NetworkExtension\nimport UIKit\n\nfinal class VPNConfigurationService: ObservableObject {\n @Published private(set) var isStarted = false\n\n /// If not nil, the tunnel is displayed.\n @Published private(set) var tunnel: NETunnelProviderManager?\n\n static let shared = VPNConfigurationService()\n\n private var observer: AnyObject?\n\n private init() {\n observer = NotificationCenter.default.addObserver(\n forName: UIApplication.willEnterForegroundNotification,\n object: nil, queue: .main) { [weak self] _ in\n self?.refresh()\n }\n }\n\n private func refresh() {\n refresh { _ in }\n }\n\n func refresh(_ completion: @escaping (Result) -> Void) {\n // Read all of the VPN configurations created by the app that have\n // previously been saved to the Network Extension preferences.\n NETunnelProviderManager.loadAllFromPreferences { [weak self] managers, error in\n guard let self = self else { return }\n\n // There is only one VPN configuration the app provides\n self.tunnel = managers?.first\n if let error = error {\n completion(.failure(error))\n } else {\n self.isStarted = true\n completion(.success(()))\n }\n }\n }\n\n func installProfile(_ completion: @escaping (Result) -> Void) {\n let tunnel = makeManager()\n tunnel.saveToPreferences { [weak self] error in\n if let error = error {\n return completion(.failure(error))\n }\n\n // See https://forums.developer.apple.com/thread/25928\n tunnel.loadFromPreferences { [weak self] error in\n self?.tunnel = tunnel\n completion(.success(()))\n }\n }\n }\n\n private func makeManager() -> NETunnelProviderManager {\n let manager = NETunnelProviderManager()\n manager.localizedDescription = \"BestVPN\"\n\n let proto = NETunnelProviderProtocol()\n\n // WARNING: This must match the bundle identifier of the app extension\n // containing packet tunnel provider.\n proto.providerBundleIdentifier = \"com.github.kean.vpn-client.vpn-tunnel\"\n\n // WARNING: This must send the actual VPN server address, for the demo\n // purposes, I'm passing the address of the server in my local network.\n // The address is going to be different in your network.\n proto.serverAddress = \"192.168.0.13:9999\"\n\n proto.username = \"kean\"\n proto.passwordReference = {\n let keychain = Keychain(group: \"group.com.github.kean.vpn-client\")\n keychain.set(password: \"123456\", for: \"kean\")\n return keychain.passwordReference(for: \"kean\")\n }()\n\n manager.protocolConfiguration = proto\n\n // Uncomment this to configure on-demand rules to make sure the tunnel\n // starts automatically when needed.\n// let onDemandRule = NEOnDemandRuleConnect()\n// onDemandRule.interfaceTypeMatch = .any\n// manager.isOnDemandEnabled = true\n// manager.onDemandRules = [onDemandRule]\n\n // Enable the manager bu default.\n manager.isEnabled = true\n\n return manager\n }\n\n private func statusUpdated() {\n\n }\n \n func removeProfile(_ completion: @escaping (Result) -> Void) {\n assert(tunnel != nil, \"Tunnel is missing\")\n tunnel?.removeFromPreferences { error in\n if let error = error {\n return completion(.failure(error))\n }\n self.tunnel = nil\n completion(.success(()))\n }\n }\n}\n\n// MARK: - Extensions\n\n/// Make NEVPNStatus convertible to a string\nextension NEVPNStatus: CustomStringConvertible {\n public var description: String {\n switch self {\n case .disconnected: return \"Disconnected\"\n case .invalid: return \"Invalid\"\n case .connected: return \"Connected\"\n case .connecting: return \"Connecting\"\n case .disconnecting: return \"Disconnecting\"\n case .reasserting: return \"Reconnecting\"\n @unknown default: return \"Unknown\"\n }\n }\n}\n" }, { "path": "vpn-client/vpn-client.entitlements", "content": "\n\n\n\n\tcom.apple.developer.networking.networkextension\n\t\n\t\tpacket-tunnel-provider\n\t\n\tcom.apple.security.application-groups\n\t\n\t\tgroup.com.github.kean.vpn-client\n\t\n\n\n" }, { "path": "vpn-protocol/Cipher.swift", "content": "// The MIT License (MIT)\n//\n// Copyright (c) 2020 Alexander Grebenyuk (github.com/kean).\n\nimport Foundation\nimport CryptoKit\n\n// WARNING: This is a simplified example, don't use it as a reference.\npublic enum Cipher {\n\n /// WARNING: This is simplified example, don't do this in production!\n ///\n /// A \"pre-shared\" symmetric key.\n public static let key = SymmetricKey(data: Data(base64Encoded: \"KGiEbfJODclOCzUVfWXBO7Y/ohnEVxf7+RnwaAA1/78=\")!)\n\n // WARNING: This is a simplified example, don't use it as a reference.\n public static func encrypt(_ data: Data, key: SymmetricKey) throws -> Data {\n try ChaChaPoly.seal(data, using: key).combined\n }\n\n // WARNING: This is a simplified example, don't use it as a reference.\n public static func decrypt(_ data: Data, key: SymmetricKey) throws -> Data {\n try ChaChaPoly.open(ChaChaPoly.SealedBox(combined: data), using: key)\n }\n}\n\npublic extension SymmetricKey {\n /// A Data instance created safely from the contiguous bytes without making any copies.\n var dataRepresentation: Data {\n return self.withUnsafeBytes { bytes in\n let cfdata = CFDataCreateWithBytesNoCopy(nil, bytes.baseAddress?.assumingMemoryBound(to: UInt8.self), bytes.count, kCFAllocatorNull)\n return ((cfdata as NSData?) as Data?) ?? Data()\n }\n }\n}\n" }, { "path": "vpn-protocol/Packet.swift", "content": "// The MIT License (MIT)\n//\n// Copyright (c) 2020 Alexander Grebenyuk (github.com/kean).\n\nimport Foundation\nimport CryptoKit\n\npublic enum PacketCode: UInt8 {\n /// A control packet containing client authentication request (JSON).\n case clientAuthRequest = 0x01\n /// A control packet containing server authentication response (JSON).\n case serverAuthResponse = 0x02\n /// A data packet containing encrypted IP packets (raw bytes).\n case data = 0x03\n\n /// Initilizes the code code with the given UDP packet contents.\n public init(datagram: Data) throws {\n guard datagram.count > 0 else {\n throw PacketParsingError.notEnoughData\n }\n guard let code = PacketCode(rawValue: datagram[0]) else {\n throw PacketParsingError.invalidPacketCode\n }\n self = code\n }\n}\n\npublic enum PacketParsingError: Error {\n case notEnoughData\n case invalidPacketCode\n}\n\npublic struct Header {\n public let code: PacketCode\n\n public static let length = 1\n\n public init(code: PacketCode) {\n self.code = code\n }\n}\n\npublic enum Body {\n public struct ClientAuthRequest: Codable {\n public let login: String\n public let password: String\n\n public init(login: String, password: String) {\n self.login = login\n self.password = password\n }\n }\n\n public struct ServerAuthResponse: Codable {\n public let isOK: Bool\n\n public init(isOK: Bool) {\n self.isOK = isOK\n }\n }\n\n public typealias Data = Foundation.Data\n}\n\n// MARK: - Encoder\n\npublic enum MessageEncoder {\n public static func encode(header: Header, body: Body, key: SymmetricKey) throws -> Data {\n try encode(header: header, body: JSONEncoder().encode(body), key: key)\n }\n\n public static func encode(header: Header, body: Data, key: SymmetricKey) throws -> Data {\n var data = Data()\n\n // Header\n data.append(header.code.rawValue)\n\n // Body\n let body = try Cipher.encrypt(body, key: key)\n data.append(body)\n\n return data\n }\n}\n\npublic enum MessageDecoder {\n /// Decrypts and decodes the body of the given datagram.\n public static func decode(_ type: T.Type, datagram: Data, key: SymmetricKey) throws -> T {\n let data = try Cipher.decrypt(datagram[Header.length...], key: key)\n return try JSONDecoder().decode(type, from: data)\n }\n}\n" }, { "path": "vpn-protocol/Session.swift", "content": "// The MIT License (MIT)\n//\n// Copyright (c) 2020 Alexander Grebenyuk (github.com/kean).\n\nimport Foundation\nimport CryptoKit\n\n// WARNING: This is a simplified example, don't use it as a reference.\npublic final class Cipher {\n private let key: SymmetricKey\n\n public init(key: SymmetricKey) {\n self.key = key\n }\n\n // WARNING: This is a simplified example, don't use it as a reference.\n public func encrypt(_ data: Data) throws -> Data {\n try ChaChaPoly.seal(data, using: key).combined\n }\n\n // WARNING: This is a simplified example, don't use it as a reference.\n public func decrypt(_ data: Data) throws -> Data {\n try ChaChaPoly.open(ChaChaPoly.SealedBox(combined: data), using: key)\n }\n}\n" }, { "path": "vpn-server/main.swift", "content": "// The MIT License (MIT)\n//\n// Copyright (c) 2020 Alexander Grebenyuk (github.com/kean).\n\nimport Foundation\nimport NIO\nimport BestVPN\n\nprivate final class VPNDatagramHandler: ChannelInboundHandler {\n public typealias InboundIn = AddressedEnvelope\n public typealias OutboundOut = AddressedEnvelope\n\n public func channelRead(context: ChannelHandlerContext, data: NIOAny) {\n let inputEnvelope = unwrapInboundIn(data)\n let inputData = Data(inputEnvelope.data.readableBytesView) // TODO: this probably isn't optimal\n do {\n let code = try PacketCode(datagram: inputData)\n\n switch code {\n case .clientAuthRequest:\n let outputData = try MessageEncoder.encode(\n header: Header(code: .serverAuthResponse), body: Body.ServerAuthResponse(isOK: true), key: Cipher.key\n )\n\n var buffer = context.channel.allocator.buffer(capacity: outputData.count)\n buffer.writeBytes(outputData)\n\n let outputEnvelope = AddressedEnvelope(remoteAddress: inputEnvelope.remoteAddress, data: buffer)\n context.write(wrapOutboundOut(outputEnvelope), promise: nil)\n\n case .data:\n // TODO: Inject packets into a virtual interface\n break\n default:\n break\n }\n } catch {\n // TODO: Handle errors\n }\n }\n\n public func channelReadComplete(context: ChannelHandlerContext) {\n // As we are not really interested getting notified on success or failure we just pass nil as promise to\n // reduce allocations.\n context.flush()\n }\n\n public func errorCaught(context: ChannelHandlerContext, error: Error) {\n print(\"error: \", error)\n\n // As we are not really interested getting notified on success or failure we just pass nil as promise to\n // reduce allocations.\n context.close(promise: nil)\n }\n}\n\n// We don't need more than one thread, as we're creating only one datagram channel.\nlet group = MultiThreadedEventLoopGroup(numberOfThreads: 1)\nvar bootstrap = DatagramBootstrap(group: group)\n // Specify backlog and enable SO_REUSEADDR\n .channelOption(ChannelOptions.socketOption(.so_reuseaddr), value: 1)\n\n // Set the handlers that are applied to the bound channel\n .channelInitializer { channel in\n // Ensure we don't read faster than we can write by adding the BackPressureHandler into the pipeline.\n channel.pipeline.addHandler(VPNDatagramHandler())\n }\n\ndefer {\n try! group.syncShutdownGracefully()\n}\n\nvar arguments = CommandLine.arguments.dropFirst(0) // just to get an ArraySlice from [String]\nif arguments.dropFirst().first == .some(\"--enable-gathering-reads\") {\n bootstrap = bootstrap.channelOption(ChannelOptions.datagramVectorReadMessageCount, value: 30)\n bootstrap = bootstrap.channelOption(ChannelOptions.recvAllocator, value: FixedSizeRecvByteBufferAllocator(capacity: 30 * 2048))\n arguments = arguments.dropFirst()\n}\nlet arg1 = arguments.dropFirst().first\nlet arg2 = arguments.dropFirst().dropFirst().first\n\n#warning(\"TEMP:\")\n//let defaultHost = \"::1\"\nlet defaultHost = \"192.168.0.13\"\nlet defaultPort = 9999\n\nenum BindTo {\n case ip(host: String, port: Int)\n case unixDomainSocket(path: String)\n}\n\nlet bindTarget: BindTo\nswitch (arg1, arg1.flatMap(Int.init), arg2.flatMap(Int.init)) {\ncase (.some(let h), _ , .some(let p)):\n /* we got two arguments, let's interpret that as host and port */\n bindTarget = .ip(host: h, port: p)\ncase (.some(let portString), .none, _):\n /* couldn't parse as number, expecting unix domain socket path */\n bindTarget = .unixDomainSocket(path: portString)\ncase (_, .some(let p), _):\n /* only one argument --> port */\n bindTarget = .ip(host: defaultHost, port: p)\ndefault:\n bindTarget = .ip(host: defaultHost, port: defaultPort)\n}\n\nlet channel = try { () -> Channel in\n switch bindTarget {\n case .ip(let host, let port):\n return try bootstrap.bind(host: host, port: port).wait()\n case .unixDomainSocket(let path):\n return try bootstrap.bind(unixDomainSocketPath: path).wait()\n }\n}()\n\nprint(\"Server started and listening on \\(channel.localAddress!)\")\n\n// This will never unblock as we don't close the channel\ntry channel.closeFuture.wait()\n\nprint(\"Server closed\")\n\n" }, { "path": "vpn-tunnel/Info.plist", "content": "\n\n\n\n\tCFBundleDevelopmentRegion\n\t$(DEVELOPMENT_LANGUAGE)\n\tCFBundleDisplayName\n\tvpn-tunnel\n\tCFBundleExecutable\n\t$(EXECUTABLE_NAME)\n\tCFBundleIdentifier\n\t$(PRODUCT_BUNDLE_IDENTIFIER)\n\tCFBundleInfoDictionaryVersion\n\t6.0\n\tCFBundleName\n\t$(PRODUCT_NAME)\n\tCFBundlePackageType\n\t$(PRODUCT_BUNDLE_PACKAGE_TYPE)\n\tCFBundleShortVersionString\n\t1.0\n\tCFBundleVersion\n\t1\n\tNSExtension\n\t\n\t\tNSExtensionPointIdentifier\n\t\tcom.apple.networkextension.packet-tunnel\n\t\tNSExtensionPrincipalClass\n\t\t$(PRODUCT_MODULE_NAME).PacketTunnelProvider\n\t\n\n\n" }, { "path": "vpn-tunnel/PacketTunnelProvider.swift", "content": "// The MIT License (MIT)\n//\n// Copyright (c) 2020 Alexander Grebenyuk (github.com/kean).\n\nimport NetworkExtension\nimport BestVPN\nimport CryptoKit\nimport os.log\n\nclass PacketTunnelProvider: NEPacketTunnelProvider {\n\n private var configuration: Configuration!\n private var udpSession: NWUDPSession!\n private var key: SymmetricKey!\n private var observer: AnyObject?\n #warning(\"TODO: do we need this queue?\")\n private let queue = DispatchQueue(label: \"com.github.packet-tunnel-provider\")\n private let log = OSLog(subsystem: \"vpn-tunnel-ptp\", category: \"default\")\n private var pendingCompletion: ((Error?) -> Void)?\n private weak var timeoutTimer: Timer?\n\n override func startTunnel(options: [String: NSObject]?, completionHandler: @escaping (Error?) -> Void) {\n os_log(.default, log: log, \"Starting tunnel, options: %{private}@\", \"\\(String(describing: options))\")\n\n do {\n guard let proto = protocolConfiguration as? NETunnelProviderProtocol else {\n throw NEVPNError(.configurationInvalid)\n }\n self.configuration = try Configuration(proto: proto)\n } catch {\n os_log(.error, log: log, \"Failed to read the configuration\", error.localizedDescription)\n completionHandler(error)\n }\n\n os_log(.default, log: log, \"Read configuration %{private}@\", \"\\(String(describing: configuration))\")\n\n // \"Get\" a pre-shared symmetric key.\n //\n // WARNING: Don't do this in production! This code uses the same key\n // every time for simplicity. In practice, you are going to want to\n // either pre-share it properly, or implement proper TLS handshake.\n self.key = Cipher.key\n\n // Remember the completion handler so that we could call it when the\n // the connection with the server is established.\n //\n // When the Packet Tunnel Provider executes the completionHandler block\n // with a nil error parameter, it signals to the system that it is ready\n // to begin handling network data. Therefore, the Packet Tunnel Provider\n // should call `setTunnelNetworkSettings(_:completionHandler:)` and wait\n // for it to complete before executing the completionHandler block.\n //\n // The domain and code of the NSError object passed to the completionHandler\n // block are defined by the Packet Tunnel Provider (`NEVPNError`).\n self.pendingCompletion = completionHandler\n\n self.startTunnel()\n }\n\n private func startTunnel() {\n self.startUDPSession()\n\n self.timeoutTimer = Timer.scheduledTimer(withTimeInterval: 10, repeats: false) { [weak self] _ in\n guard let self = self else { return }\n\n self.pendingCompletion?(NEVPNError(.connectionFailed))\n self.pendingCompletion = nil\n }\n }\n\n private func startUDPSession() {\n os_log(.default, log: log, \"Starting UDP session, hostname: %{public}@, port: %{public}@\", configuration.hostname, configuration.port)\n\n let endpoint = NWHostEndpoint(hostname: configuration.hostname, port: configuration.port)\n self.udpSession = createUDPSession(to: endpoint, from: nil)\n self.observer = udpSession.observe(\\.state, options: [.new]) { [weak self] session, _ in\n guard let self = self else { return }\n os_log(.default, log: self.log, \"Session did update state: %{public}@\", session.state.description)\n self.queue.async {\n self.udpSession(session, didUpdateState: session.state)\n }\n }\n }\n\n private func udpSession(_ session: NWUDPSession, didUpdateState state: NWUDPSessionState) {\n switch state {\n case .ready:\n guard pendingCompletion != nil else { return }\n\n session.setReadHandler({ [weak self] datagrams, error in\n guard let self = self else { return }\n self.queue.async {\n self.didReceiveDatagrams(datagrams: datagrams ?? [], error: error)\n }\n }, maxDatagrams: Int.max)\n\n do {\n try self.authenticate(username: configuration.username, password: configuration.password)\n } catch {\n // TODO: handle errors\n os_log(.default, log: self.log, \"Did fail to authenticate: %{public}@\", \"\\(error)\")\n }\n case .failed:\n guard pendingCompletion != nil else { return }\n pendingCompletion?(NEVPNError(.connectionFailed))\n pendingCompletion = nil\n default:\n break\n }\n }\n\n private func didReceiveDatagrams(datagrams: [Data], error: Error?) {\n for datagram in datagrams {\n do {\n try self.didReceiveDatagram(datagram: datagram)\n } catch {\n // TODO: handle error\n os_log(.default, log: self.log, \"UDP session read handler error: %{public}@\", \"\\(error)\")\n }\n }\n if let error = error {\n // TODO: handle error\n os_log(.default, log: self.log, \"UDP session read handler error: %{public}@\", \"\\(error)\")\n }\n }\n\n private func didReceiveDatagram(datagram: Data) throws {\n let code = try PacketCode(datagram: datagram)\n\n os_log(.default, log: self.log, \"Did receive datagram with code: %{public}@\", \"\\(code)\")\n\n switch code {\n case .serverAuthResponse:\n let response = try MessageDecoder.decode(Body.ServerAuthResponse.self, datagram: datagram, key: key)\n os_log(.default, log: self.log, \"Did receive auth response: %{private}@\", \"\\(response)\")\n if response.isOK {\n // TODO: In reality, you would pass a resolved IP address, in our\n // case we already provide an IP address in the configurtaion\n self.didSetupTunnel(address: configuration.hostname)\n } else {\n // TODO: Handle error\n }\n self.timeoutTimer?.invalidate()\n case .data:\n let data = try MessageDecoder.decode(Data.self, datagram: datagram, key: key)\n let proto = protocolNumber(for: data)\n self.packetFlow.writePackets([data], withProtocols: [proto])\n default:\n break\n }\n }\n\n private func didSetupTunnel(address: String) {\n os_log(.default, log: self.log, \"Did setup tunnel with address: %{public}@\", \"\\(address)\")\n\n let settings = NEPacketTunnelNetworkSettings(tunnelRemoteAddress: address)\n // TODO: Configure DNS/split-tunnel/etc settings if needed\n\n setTunnelNetworkSettings(settings) { error in\n os_log(.default, log: self.log, \"Did setup tunnel settings: %{public}@, error: %{public}@\", \"\\(settings)\", \"\\(String(describing: error))\")\n\n self.pendingCompletion?(error)\n self.pendingCompletion = nil\n\n self.didStartTunnel()\n }\n }\n\n private func authenticate(username: String, password: String) throws {\n let datagram = try MessageEncoder.encode(\n header: Header(code: .clientAuthRequest),\n body: Body.ClientAuthRequest(login: username, password: password),\n key: key\n )\n\n udpSession.writeDatagram(datagram) { error in\n if let error = error {\n // TODO: Handle errors\n os_log(.default, log: self.log, \"Failed to write auth request datagram, error: %{public}@\", \"\\(error)\")\n }\n }\n }\n\n private func didStartTunnel() {\n readPackets()\n }\n\n private func readPackets() {\n packetFlow.readPacketObjects { packets in\n do {\n let datagrams = try packets.map {\n try MessageEncoder.encode(\n header: Header(code: .data),\n body: $0.data,\n key: key\n )\n }\n self.session.writeMultipleDatagrams(datagrams) { error in\n // TODO: Handle errors\n }\n } catch {\n // TODO: Handle errors\n }\n\n self.readPackets()\n }\n }\n\n override func stopTunnel(with reason: NEProviderStopReason, completionHandler: @escaping () -> Void) {\n // Add code here to start the process of stopping the tunnel.\n completionHandler()\n }\n \n override func handleAppMessage(_ messageData: Data, completionHandler: ((Data?) -> Void)?) {\n // Add code here to handle the message.\n if let handler = completionHandler {\n handler(messageData)\n }\n }\n \n override func sleep(completionHandler: @escaping () -> Void) {\n // Add code here to get ready to sleep.\n completionHandler()\n }\n \n override func wake() {\n // Add code here to wake up.\n }\n}\n\nprivate struct Configuration {\n let username: String\n let password: String\n let hostname: String\n let port: String\n\n init(proto: NETunnelProviderProtocol) throws {\n guard let fullServerAddress = proto.serverAddress else {\n throw NEVPNError(.configurationInvalid)\n }\n let serverAddressParts = fullServerAddress.split(separator: \":\")\n guard serverAddressParts.count == 2 else {\n throw NEVPNError(.configurationInvalid)\n }\n\n self.hostname = String(serverAddressParts[0])\n self.port = String(serverAddressParts[1])\n\n guard let username = proto.username else {\n throw NEVPNError(.configurationInvalid)\n }\n self.username = username\n\n guard let password = proto.passwordReference.flatMap({\n Keychain.password(for: username, reference: $0)\n }) else {\n throw NEVPNError(.configurationInvalid)\n }\n self.password = password\n }\n}\n\nextension NWUDPSessionState: CustomStringConvertible {\n public var description: String {\n switch self {\n case .cancelled: return \".cancelled\"\n case .failed: return \".failed\"\n case .invalid: return \".invalid\"\n case .preparing: return \".preparing\"\n case .ready: return \".ready\"\n case .waiting: return \".waiting\"\n @unknown default: return \"unknown\"\n }\n }\n}\n\nprivate func protocolNumber(for packet: Data) -> NSNumber {\n guard !packet.isEmpty else {\n return AF_INET as NSNumber\n }\n\n // 'packet' contains the decrypted incoming IP packet data\n\n // The first 4 bits identify the IP version\n let ipVersion = (packet[0] & 0xf0) >> 4\n return (ipVersion == 6) ? AF_INET6 as NSNumber : AF_INET as NSNumber\n}\n" }, { "path": "vpn-tunnel/vpn_tunnel.entitlements", "content": "\n\n\n\n\tcom.apple.developer.networking.networkextension\n\t\n\t\tpacket-tunnel-provider\n\t\n\tcom.apple.security.application-groups\n\t\n\t\tgroup.com.github.kean.vpn-client\n\t\n\n\n" }, { "path": "vpn.xcodeproj/project.pbxproj", "content": "// !$*UTF8*$!\n{\n\tarchiveVersion = 1;\n\tclasses = {\n\t};\n\tobjectVersion = 52;\n\tobjects = {\n\n/* Begin PBXBuildFile section */\n\t\t0C189C482479D399000EE6B3 /* main.swift in Sources */ = {isa = PBXBuildFile; fileRef = 0C189C432479D280000EE6B3 /* main.swift */; };\n\t\t0C230CDA24884C35005FEEBD /* libBestVPN.a in Frameworks */ = {isa = PBXBuildFile; fileRef = 0CD38AF92486C12E00DB2626 /* libBestVPN.a */; };\n\t\t0C34DF93248D50E500FBBD11 /* Cipher.swift in Sources */ = {isa = PBXBuildFile; fileRef = 0C34DF92248D50E500FBBD11 /* Cipher.swift */; };\n\t\t0C3C1B5F247039EB00571084 /* VPNConfigurationService.swift in Sources */ = {isa = 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