Create FUNDING.yml

.github/FUNDING.yml

@@ -0,0 +1 @@
+github: maxgoedjen

Brief/Brief.h

@@ -0,0 +1,19 @@
+//
+//  Brief.h
+//  Brief
+//
+//  Created by Max Goedjen on 3/21/20.
+//  Copyright © 2020 Max Goedjen. All rights reserved.
+//
+
+#import <Foundation/Foundation.h>
+
+//! Project version number for Brief.
+FOUNDATION_EXPORT double BriefVersionNumber;
+
+//! Project version string for Brief.
+FOUNDATION_EXPORT const unsigned char BriefVersionString[];
+
+// In this header, you should import all the public headers of your framework using statements like #import <Brief/PublicHeader.h>
+
+

Brief/Info.plist

@@ -0,0 +1,24 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>CFBundleDevelopmentRegion</key>
+	<string>$(DEVELOPMENT_LANGUAGE)</string>
+	<key>CFBundleExecutable</key>
+	<string>$(EXECUTABLE_NAME)</string>
+	<key>CFBundleIdentifier</key>
+	<string>$(PRODUCT_BUNDLE_IDENTIFIER)</string>
+	<key>CFBundleInfoDictionaryVersion</key>
+	<string>6.0</string>
+	<key>CFBundleName</key>
+	<string>$(PRODUCT_NAME)</string>
+	<key>CFBundlePackageType</key>
+	<string>$(PRODUCT_BUNDLE_PACKAGE_TYPE)</string>
+	<key>CFBundleShortVersionString</key>
+	<string>1.0</string>
+	<key>CFBundleVersion</key>
+	<string>$(CURRENT_PROJECT_VERSION)</string>
+	<key>NSHumanReadableCopyright</key>
+	<string>$(PRODUCT_NAME) is MIT Licensed.</string>
+</dict>
+</plist>

Brief/Updater.swift

@@ -1,17 +1,17 @@
 import Foundation
 import Combine
 
-protocol UpdaterProtocol: ObservableObject {
+public protocol UpdaterProtocol: ObservableObject {
 
     var update: Release? { get }
 
 }
 
-class Updater: ObservableObject, UpdaterProtocol {
+public class Updater: ObservableObject, UpdaterProtocol {
 
-    @Published var update: Release?
+    @Published public var update: Release?
 
-    init() {
+    public init() {
         checkForUpdates()
         let timer = Timer.scheduledTimer(withTimeInterval: 60*60*24, repeats: true) { _ in
             self.checkForUpdates()
@@ -19,7 +19,7 @@ class Updater: ObservableObject, UpdaterProtocol {
         timer.tolerance = 60*60
     }
 
-    func checkForUpdates() {
+    public func checkForUpdates() {
         URLSession.shared.dataTask(with: Constants.updateURL) { data, _, _ in
             guard let data = data else { return }
             guard let release = try? JSONDecoder().decode(Release.self, from: data) else { return }
@@ -27,7 +27,20 @@ class Updater: ObservableObject, UpdaterProtocol {
         }.resume()
     }
 
+    public func ignore(release: Release) {
+        guard !release.critical else { return }
+        defaults.set(true, forKey: release.name)
+        DispatchQueue.main.async {
+            self.update = nil
+        }
+    }
+
+}
+
+extension Updater {
+
     func evaluate(release: Release) {
+        guard !userIgnored(release: release) else { return }
         let latestVersion = semVer(from: release.name)
         let currentVersion = semVer(from: Bundle.main.infoDictionary!["CFBundleShortVersionString"] as! String)
         for (latest, current) in zip(latestVersion, currentVersion) {
@@ -48,6 +61,14 @@ class Updater: ObservableObject, UpdaterProtocol {
         return split
     }
 
+    func userIgnored(release: Release) -> Bool {
+        guard !release.critical else { return false }
+        return defaults.bool(forKey: release.name)
+    }
+
+    var defaults: UserDefaults {
+        UserDefaults(suiteName: "com.maxgoedjen.Secretive.updater.ignorelist")!
+    }
 }
 
 extension Updater {
@@ -58,16 +79,24 @@ extension Updater {
 
 }
 
-struct Release: Codable {
+public struct Release: Codable {
-    let name: String
+
-    let html_url: URL
+    public let name: String
-    let body: String
+    public let html_url: URL
+    public let body: String
+
+    public init(name: String, html_url: URL, body: String) {
+        self.name = name
+        self.html_url = html_url
+        self.body = body
+    }
+
 }
 
 
 extension Release {
 
-    var critical: Bool {
+    public var critical: Bool {
         return body.contains(Constants.securityContent)
     }
 

README.md

@@ -1,9 +1,11 @@
-# Secretive
+# Secretive ![Test](https://github.com/maxgoedjen/secretive/workflows/Test/badge.svg) ![Release](https://github.com/maxgoedjen/secretive/workflows/Release/badge.svg)
+
 
 Secretive is an app for storing and managing SSH keys in the Secure Enclave. It is inspired by the [sekey project](https://github.com/sekey/sekey), but rewritten in Swift with no external dependencies and with a handy native management app.
 
 <img src="/.github/readme/app.png" alt="Screenshot of Secretive" width="600">
 
+
 ## Why?
 
 ### Safer Storage
@@ -36,7 +38,7 @@ For non-command-line based apps, like GUI Git clients, you may need to go throug
 [Tower](https://www.git-tower.com/help/mac/integration/environment)
 
 
-### Security Considerations
+### Auditable Build Process
 
 Builds are produced by GitHub Actions with an auditable build and release generation process. Each build has a "Document SHAs" step, which will output SHA checksums for the build produced by the GitHub Action, so you can verify that the source code for a given build corresponds to any given release.
 

SecretAgent/AppDelegate.swift

@@ -1,7 +1,9 @@
 import Cocoa
+import OSLog
+import Combine
 import SecretKit
 import SecretAgentKit
-import OSLog
+import Brief
 
 @NSApplicationMain
 class AppDelegate: NSObject, NSApplicationDelegate {
@@ -12,6 +14,7 @@ class AppDelegate: NSObject, NSApplicationDelegate {
         list.add(store: SmartCard.Store())
         return list
     }()
+    let updater = Updater()
     let notifier = Notifier()
     lazy var agent: Agent = {
         Agent(storeList: storeList, witness: notifier)
@@ -20,17 +23,18 @@ class AppDelegate: NSObject, NSApplicationDelegate {
         let path = (NSHomeDirectory() as NSString).appendingPathComponent("socket.ssh") as String
         return SocketController(path: path)
     }()
+    fileprivate var updateSink: AnyCancellable?
 
     func applicationDidFinishLaunching(_ aNotification: Notification) {
         os_log(.debug, "SecretAgent finished launching")
         DispatchQueue.main.async {
-            self.socketController.handler = self.agent.handle(fileHandle:)
+            self.socketController.handler = self.agent.handle(reader:writer:)
         }
         notifier.prompt()
-    }
+        updateSink = updater.$update.sink { update in
-
+            guard let update = update else { return }
-    func applicationWillTerminate(_ aNotification: Notification) {
+            self.notifier.notify(update: update, ignore: self.updater.ignore(release:))
-        // Insert code here to tear down your application
+        }
     }
 
 

SecretAgent/Info.plist

@@ -25,7 +25,7 @@
 	<key>LSUIElement</key>
 	<true/>
 	<key>NSHumanReadableCopyright</key>
-	<string>Copyright © 2020 Max Goedjen. All rights reserved.</string>
+	<string>$(PRODUCT_NAME) is MIT Licensed.</string>
 	<key>NSMainStoryboardFile</key>
 	<string>Main</string>
 	<key>NSPrincipalClass</key>

SecretAgent/Notifier.swift

@@ -1,10 +1,23 @@
 import Foundation
+import UserNotifications
+import AppKit
 import SecretKit
 import SecretAgentKit
-import UserNotifications
+import Brief
 
 class Notifier {
 
+    fileprivate let notificationDelegate = NotificationDelegate()
+
+    init() {
+        let updateAction = UNNotificationAction(identifier: Constants.updateActionIdentitifier, title: "Update", options: [])
+        let ignoreAction = UNNotificationAction(identifier: Constants.ignoreActionIdentitifier, title: "Ignore", options: [])
+        let updateCategory = UNNotificationCategory(identifier: Constants.updateCategoryIdentitifier, actions: [updateAction, ignoreAction], intentIdentifiers: [], options: [])
+        let criticalUpdateCategory = UNNotificationCategory(identifier: Constants.updateCategoryIdentitifier, actions: [updateAction], intentIdentifiers: [], options: [])
+        UNUserNotificationCenter.current().setNotificationCategories([updateCategory, criticalUpdateCategory])
+        UNUserNotificationCenter.current().delegate = notificationDelegate
+    }
+
     func prompt() {
         let notificationCenter = UNUserNotificationCenter.current()
         notificationCenter.requestAuthorization(options: .alert) { _, _ in
@@ -14,12 +27,49 @@ class Notifier {
     func notify(accessTo secret: AnySecret, by provenance: SigningRequestProvenance) {
         let notificationCenter = UNUserNotificationCenter.current()
         let notificationContent = UNMutableNotificationContent()
-        notificationContent.title = "Signed Request"
+        notificationContent.title = "Signed Request from \(provenance.origin.name)"
-        notificationContent.body = "\(secret.name) was used to sign a request from \(provenance.origin.name)."
+        notificationContent.subtitle = "Using secret \"\(secret.name)\""
+        if let iconURL = iconURL(for: provenance), let attachment = try? UNNotificationAttachment(identifier: "icon", url: iconURL, options: nil) {
+            notificationContent.attachments = [attachment]
+        }
         let request = UNNotificationRequest(identifier: UUID().uuidString, content: notificationContent, trigger: nil)
         notificationCenter.add(request, withCompletionHandler: nil)
     }
 
+    func notify(update: Release, ignore: ((Release) -> Void)?) {
+        notificationDelegate.release = update
+        notificationDelegate.ignore = ignore
+        let notificationCenter = UNUserNotificationCenter.current()
+        let notificationContent = UNMutableNotificationContent()
+        if update.critical {
+            notificationContent.title = "Critical Security Update - \(update.name)"
+        } else {
+            notificationContent.title = "Update Available - \(update.name)"
+        }
+        notificationContent.subtitle = "Click to Update"
+        notificationContent.body = update.body
+        notificationContent.categoryIdentifier = update.critical ? Constants.criticalUpdateCategoryIdentitifier : Constants.updateCategoryIdentitifier
+        let request = UNNotificationRequest(identifier: UUID().uuidString, content: notificationContent, trigger: nil)
+        notificationCenter.add(request, withCompletionHandler: nil)
+    }
+
+}
+
+extension Notifier {
+
+    func iconURL(for provenance: SigningRequestProvenance) -> URL? {
+        do {
+            if let app = NSRunningApplication(processIdentifier: provenance.origin.pid), let icon = app.icon?.tiffRepresentation {
+                let temporaryURL = URL(fileURLWithPath: (NSTemporaryDirectory() as NSString).appendingPathComponent("\(UUID().uuidString).png"))
+                let bitmap = NSBitmapImageRep(data: icon)
+                try bitmap?.representation(using: .png, properties: [:])?.write(to: temporaryURL)
+                return temporaryURL
+            }
+        } catch {
+        }
+        return nil
+    }
+
 }
 
 extension Notifier: SigningWitness {
@@ -32,3 +82,42 @@ extension Notifier: SigningWitness {
     }
 
 }
+
+extension Notifier {
+
+    enum Constants {
+        static let updateCategoryIdentitifier  = "com.maxgoedjen.Secretive.SecretAgent.update"
+        static let criticalUpdateCategoryIdentitifier  = "com.maxgoedjen.Secretive.SecretAgent.update.critical"
+        static let updateActionIdentitifier  = "com.maxgoedjen.Secretive.SecretAgent.update.updateaction"
+        static let ignoreActionIdentitifier  = "com.maxgoedjen.Secretive.SecretAgent.update.ignoreaction"
+    }
+
+}
+
+class NotificationDelegate: NSObject, UNUserNotificationCenterDelegate {
+
+    fileprivate var release: Release?
+    fileprivate var ignore: ((Release) -> Void)?
+
+    func userNotificationCenter(_ center: UNUserNotificationCenter, openSettingsFor notification: UNNotification?) {
+
+    }
+
+    func userNotificationCenter(_ center: UNUserNotificationCenter, didReceive response: UNNotificationResponse, withCompletionHandler completionHandler: @escaping () -> Void) {
+        guard let update = release else { return }
+        switch response.actionIdentifier {
+        case Notifier.Constants.updateActionIdentitifier, UNNotificationDefaultActionIdentifier:
+            NSWorkspace.shared.open(update.html_url)
+        case Notifier.Constants.ignoreActionIdentitifier:
+            ignore?(update)
+        default:
+            fatalError()
+        }
+        completionHandler()
+    }
+
+    func userNotificationCenter(_ center: UNUserNotificationCenter, willPresent notification: UNNotification, withCompletionHandler completionHandler: @escaping (UNNotificationPresentationOptions) -> Void) {
+        completionHandler(.alert)
+    }
+
+}

SecretAgent/SecretAgent.entitlements

@@ -4,6 +4,8 @@
 <dict>
 	<key>com.apple.security.app-sandbox</key>
 	<true/>
+	<key>com.apple.security.network.client</key>
+	<true/>
 	<key>com.apple.security.smartcard</key>
 	<true/>
 	<key>keychain-access-groups</key>

SecretAgentKit/Agent.swift

@@ -2,7 +2,6 @@ import Foundation
 import CryptoKit
 import OSLog
 import SecretKit
-import SecretAgentKit
 import AppKit
 
 public class Agent {
@@ -22,28 +21,34 @@ public class Agent {
 
 extension Agent {
 
-    public func handle(fileHandle: FileHandle) {
+    public func handle(reader: FileHandleReader, writer: FileHandleWriter) {
         os_log(.debug, "Agent handling new data")
-        let data = fileHandle.availableData
+        let data = reader.availableData
         guard !data.isEmpty else { return }
         let requestTypeInt = data[4]
-        guard let requestType = SSHAgent.RequestType(rawValue: requestTypeInt) else { return }
+        guard let requestType = SSHAgent.RequestType(rawValue: requestTypeInt) else {
+            writer.write(OpenSSHKeyWriter().lengthAndData(of: SSHAgent.ResponseType.agentFailure.data))
+            os_log(.debug, "Agent returned %@", SSHAgent.ResponseType.agentFailure.debugDescription)
+            return
+        }
         os_log(.debug, "Agent handling request of type %@", requestType.debugDescription)
         let subData = Data(data[5...])
-        handle(requestType: requestType, data: subData, fileHandle: fileHandle)
+        let response = handle(requestType: requestType, data: subData, reader: reader)
+        writer.write(response)
     }
 
-    func handle(requestType: SSHAgent.RequestType, data: Data, fileHandle: FileHandle) {
+    func handle(requestType: SSHAgent.RequestType, data: Data, reader: FileHandleReader) -> Data {
         var response = Data()
         do {
             switch requestType {
             case .requestIdentities:
                 response.append(SSHAgent.ResponseType.agentIdentitiesAnswer.data)
-                response.append(try identities())
+                response.append(identities())
                 os_log(.debug, "Agent returned %@", SSHAgent.ResponseType.agentIdentitiesAnswer.debugDescription)
             case .signRequest:
+                let provenance = requestTracer.provenance(from: reader)
                 response.append(SSHAgent.ResponseType.agentSignResponse.data)
-                response.append(try sign(data: data, from: fileHandle.fileDescriptor))
+                response.append(try sign(data: data, provenance: provenance))
                 os_log(.debug, "Agent returned %@", SSHAgent.ResponseType.agentSignResponse.debugDescription)
             }
         } catch {
@@ -52,14 +57,14 @@ extension Agent {
             os_log(.debug, "Agent returned %@", SSHAgent.ResponseType.agentFailure.debugDescription)
         }
         let full = OpenSSHKeyWriter().lengthAndData(of: response)
-        fileHandle.write(full)
+        return full
     }
 
 }
 
 extension Agent {
 
-    func identities() throws -> Data {
+    func identities() -> Data {
         // TODO: RESTORE ONCE XCODE 11.4 IS GM
         let secrets = storeList.stores.flatMap { $0.secrets }
 //        let secrets = storeList.stores.flatMap(\.secrets)
@@ -77,20 +82,19 @@ extension Agent {
         return countData + keyData
     }
 
-    func sign(data: Data, from pid: Int32) throws -> Data {
+    func sign(data: Data, provenance: SigningRequestProvenance) throws -> Data {
         let reader = OpenSSHReader(data: data)
-        let hash = try reader.readNextChunk()
+        let hash = reader.readNextChunk()
         guard let (store, secret) = secret(matching: hash) else {
             os_log(.debug, "Agent did not have a key matching %@", hash as NSData)
             throw AgentError.noMatchingKey
         }
 
-        let provenance = requestTracer.provenance(from: pid)
         if let witness = witness {
             try witness.speakNowOrForeverHoldYourPeace(forAccessTo: secret, by: provenance)
         }
 
-        let dataToSign = try reader.readNextChunk()
+        let dataToSign = reader.readNextChunk()
         let derSignature = try store.sign(data: dataToSign, with: secret)
 
         let curveData = writer.curveType(for: secret.algorithm, length: secret.keySize).data(using: .utf8)!
@@ -104,7 +108,7 @@ extension Agent {
         case (.ellipticCurve, 384):
             rawRepresentation = try CryptoKit.P384.Signing.ECDSASignature(derRepresentation: derSignature).rawRepresentation
         default:
-            fatalError()
+            throw AgentError.unsupportedKeyType
         }
 
 
@@ -155,6 +159,7 @@ extension Agent {
     enum AgentError: Error {
         case unhandledType
         case noMatchingKey
+        case unsupportedKeyType
     }
 
 }

SecretAgentKit/FileHandleProtocols.swift

@@ -0,0 +1,26 @@
+import Foundation
+
+public protocol FileHandleReader {
+
+    var availableData: Data { get }
+    var fileDescriptor: Int32 { get }
+    var pidOfConnectedProcess: Int32 { get }
+
+}
+
+public protocol FileHandleWriter {
+
+    func write(_ data: Data)
+
+}
+
+extension FileHandle: FileHandleReader, FileHandleWriter {
+
+    public var pidOfConnectedProcess: Int32 {
+        let pidPointer = UnsafeMutableRawPointer.allocate(byteCount: 4, alignment: 1)
+        var len = socklen_t(MemoryLayout<Int32>.size)
+        getsockopt(fileDescriptor, SOCK_STREAM, LOCAL_PEERPID, pidPointer, &len)
+        return pidPointer.load(as: Int32.self)
+    }
+
+}

SecretAgentKit/Info.plist

@@ -19,6 +19,6 @@
 	<key>CFBundleVersion</key>
 	<string>$(CURRENT_PROJECT_VERSION)</string>
 	<key>NSHumanReadableCopyright</key>
-	<string>Copyright © 2020 Max Goedjen. All rights reserved.</string>
+	<string>$(PRODUCT_NAME) is MIT Licensed.</string>
 </dict>
 </plist>

SecretAgentKit/SSHAgentProtocol.swift

@@ -12,7 +12,7 @@ extension SSHAgent {
             switch self {
             case .requestIdentities:
                 return "RequestIdentities"
-            default:
+            case .signRequest:
                 return "SignRequest"
             }
         }

SecretAgentKit/SecretAgentKit.h

@@ -1,11 +1,3 @@
-//
-//  SecretAgentKit.h
-//  SecretAgentKit
-//
-//  Created by Max Goedjen on 2/22/20.
-//  Copyright © 2020 Max Goedjen. All rights reserved.
-//
-
 #import <Foundation/Foundation.h>
 #import <Security/Security.h>
 

SecretAgentKit/SigningRequestProvenance.swift

@@ -1,7 +1,7 @@
 import Foundation
 import AppKit
 
-public struct SigningRequestProvenance {
+public struct SigningRequestProvenance: Equatable {
 
     public var chain: [Process]
     public init(root: Process) {
@@ -24,7 +24,7 @@ extension SigningRequestProvenance {
 
 extension SigningRequestProvenance {
 
-    public struct Process {
+    public struct Process: Equatable {
 
         public let pid: Int32
         public let name: String

SecretAgentKit/SigningRequestTracer.swift

@@ -4,12 +4,8 @@ import Security
 
 struct SigningRequestTracer {
 
-    func provenance(from pid: Int32) -> SigningRequestProvenance {
+    func provenance(from fileHandleReader: FileHandleReader) -> SigningRequestProvenance {
-        let pidPointer = UnsafeMutableRawPointer.allocate(byteCount: 4, alignment: 1)
+        let firstInfo = process(from: fileHandleReader.pidOfConnectedProcess)
-        var len = socklen_t(MemoryLayout<Int32>.size)
-        getsockopt(pid, SOCK_STREAM, LOCAL_PEERPID, pidPointer, &len)
-        let pid = pidPointer.load(as: Int32.self)
-        let firstInfo = process(from: pid)
 
         var provenance = SigningRequestProvenance(root: firstInfo)
         while NSRunningApplication(processIdentifier: provenance.origin.pid) == nil && provenance.origin.parentPID != nil {

SecretAgentKit/SocketController.swift

@@ -5,7 +5,7 @@ public class SocketController {
 
     fileprivate var fileHandle: FileHandle?
     fileprivate var port: SocketPort?
-    public var handler: ((FileHandle) -> Void)?
+    public var handler: ((FileHandleReader, FileHandleWriter) -> Void)?
 
     public init(path: String) {
         os_log(.debug, "Socket controller setting up at %@", path)
@@ -52,7 +52,7 @@ public class SocketController {
     @objc func handleConnectionAccept(notification: Notification) {
         os_log(.debug, "Socket controller accepted connection")
         guard let new = notification.userInfo?[NSFileHandleNotificationFileHandleItem] as? FileHandle else { return }
-        handler?(new)
+        handler?(new, new)
         new.waitForDataInBackgroundAndNotify()
         fileHandle?.acceptConnectionInBackgroundAndNotify(forModes: [RunLoop.current.currentMode!])
     }
@@ -61,7 +61,7 @@ public class SocketController {
         os_log(.debug, "Socket controller has new data available")
         guard let new = notification.object as? FileHandle else { return }
         os_log(.debug, "Socket controller received new file handle")
-        handler?(new)
+        handler?(new, new)
     }
 
 }

SecretAgentKitTests/AgentTests.swift

@@ -0,0 +1,162 @@
+import Foundation
+import XCTest
+import CryptoKit
+@testable import SecretKit
+@testable import SecretAgentKit
+
+class AgentTests: XCTestCase {
+
+    let stubWriter = StubFileHandleWriter()
+
+    // MARK: Identity Listing
+
+    func testEmptyStores() {
+        let stubReader = StubFileHandleReader(availableData: Constants.Requests.requestIdentities)
+        let agent = Agent(storeList: SecretStoreList())
+        agent.handle(reader: stubReader, writer: stubWriter)
+        XCTAssertEqual(stubWriter.data, Constants.Responses.requestIdentitiesEmpty)
+    }
+
+    func testIdentitiesList() {
+        let stubReader = StubFileHandleReader(availableData: Constants.Requests.requestIdentities)
+        let list = storeList(with: [Constants.Secrets.ecdsa256Secret, Constants.Secrets.ecdsa384Secret])
+        let agent = Agent(storeList: list)
+        agent.handle(reader: stubReader, writer: stubWriter)
+        XCTAssertEqual(stubWriter.data, Constants.Responses.requestIdentitiesMultiple)
+    }
+
+    // MARK: Signatures
+
+    func testNoMatchingIdentities() {
+        let stubReader = StubFileHandleReader(availableData: Constants.Requests.requestSignatureWithNoneMatching)
+        let list = storeList(with: [Constants.Secrets.ecdsa256Secret, Constants.Secrets.ecdsa384Secret])
+        let agent = Agent(storeList: list)
+        agent.handle(reader: stubReader, writer: stubWriter)
+//        XCTAssertEqual(stubWriter.data, Constants.Responses.requestFailure)
+    }
+
+    func testSignature() {
+        let stubReader = StubFileHandleReader(availableData: Constants.Requests.requestSignature)
+        let requestReader = OpenSSHReader(data: Constants.Requests.requestSignature[5...])
+        _ = requestReader.readNextChunk()
+        let dataToSign = requestReader.readNextChunk()
+        let list = storeList(with: [Constants.Secrets.ecdsa256Secret, Constants.Secrets.ecdsa384Secret])
+        let agent = Agent(storeList: list)
+        agent.handle(reader: stubReader, writer: stubWriter)
+        let outer = OpenSSHReader(data: stubWriter.data[5...])
+        let payload = outer.readNextChunk()
+        let inner = OpenSSHReader(data: payload)
+        _ = inner.readNextChunk()
+        let signedData = inner.readNextChunk()
+        let rsData = OpenSSHReader(data: signedData)
+        let r = rsData.readNextChunk()
+        let s = rsData.readNextChunk()
+        var rs = r
+        rs.append(s)
+        let signature = try! P256.Signing.ECDSASignature(rawRepresentation: rs)
+        let valid = try! P256.Signing.PublicKey(x963Representation: Constants.Secrets.ecdsa256Secret.publicKey).isValidSignature(signature, for: dataToSign)
+        XCTAssertTrue(valid)
+    }
+
+    // MARK: Witness protocol
+
+    func testWitnessObjectionStopsRequest() {
+        let stubReader = StubFileHandleReader(availableData: Constants.Requests.requestSignature)
+        let list = storeList(with: [Constants.Secrets.ecdsa256Secret])
+        let witness = StubWitness(speakNow: { _,_  in
+            return true
+        }, witness: { _, _ in })
+        let agent = Agent(storeList: list, witness: witness)
+        agent.handle(reader: stubReader, writer: stubWriter)
+        XCTAssertEqual(stubWriter.data, Constants.Responses.requestFailure)
+    }
+
+    func testWitnessSignature() {
+        let stubReader = StubFileHandleReader(availableData: Constants.Requests.requestSignature)
+        let list = storeList(with: [Constants.Secrets.ecdsa256Secret])
+        var witnessed = false
+        let witness = StubWitness(speakNow: { _, trace  in
+            return false
+        }, witness: { _, trace in
+            witnessed = true
+        })
+        let agent = Agent(storeList: list, witness: witness)
+        agent.handle(reader: stubReader, writer: stubWriter)
+        XCTAssertTrue(witnessed)
+    }
+
+    func testRequestTracing() {
+        let stubReader = StubFileHandleReader(availableData: Constants.Requests.requestSignature)
+        let list = storeList(with: [Constants.Secrets.ecdsa256Secret])
+        var speakNowTrace: SigningRequestProvenance! = nil
+        var witnessTrace: SigningRequestProvenance! = nil
+        let witness = StubWitness(speakNow: { _, trace  in
+            speakNowTrace = trace
+            return false
+        }, witness: { _, trace in
+            witnessTrace = trace
+        })
+        let agent = Agent(storeList: list, witness: witness)
+        agent.handle(reader: stubReader, writer: stubWriter)
+        XCTAssertEqual(witnessTrace, speakNowTrace)
+        XCTAssertEqual(witnessTrace.origin.name, "Finder")
+        XCTAssertEqual(witnessTrace.origin.validSignature, true)
+        XCTAssertEqual(witnessTrace.origin.parentPID, 1)
+    }
+
+    // MARK: Exception Handling
+
+    func testSignatureException() {
+        let stubReader = StubFileHandleReader(availableData: Constants.Requests.requestSignature)
+        let list = storeList(with: [Constants.Secrets.ecdsa256Secret, Constants.Secrets.ecdsa384Secret])
+        let store = list.stores.first?.base as! Stub.Store
+        store.shouldThrow = true
+        let agent = Agent(storeList: list)
+        agent.handle(reader: stubReader, writer: stubWriter)
+        XCTAssertEqual(stubWriter.data, Constants.Responses.requestFailure)
+    }
+
+    // MARK: Unsupported
+
+    func testUnhandledAdd() {
+        let stubReader = StubFileHandleReader(availableData: Constants.Requests.addIdentity)
+        let agent = Agent(storeList: SecretStoreList())
+        agent.handle(reader: stubReader, writer: stubWriter)
+        XCTAssertEqual(stubWriter.data, Constants.Responses.requestFailure)
+    }
+
+}
+
+extension AgentTests {
+
+    func storeList(with secrets: [Stub.Secret]) -> SecretStoreList {
+        let store = Stub.Store()
+        store.secrets.append(contentsOf: secrets)
+        let storeList = SecretStoreList()
+        storeList.add(store: store)
+        return storeList
+    }
+
+    enum Constants {
+
+        enum Requests {
+            static let requestIdentities = Data(base64Encoded: "AAAAAQs=")!
+            static let addIdentity = Data(base64Encoded: "AAAAARE=")!
+            static let requestSignatureWithNoneMatching = Data(base64Encoded: "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")!
+            static let requestSignature = Data(base64Encoded: "AAABRA0AAABoAAAAE2VjZHNhLXNoYTItbmlzdHAyNTYAAAAIbmlzdHAyNTYAAABBBKzOkUiVJEcACMtAd9X7xalbc0FYZyhbmv2dsWl4IP2GWIi+RcsaHQNw+nAIQ8CKEYmLnl0VLDp5Ef8KMhgIy08AAADPAAAAIBIFsbCZ4/dhBmLNGHm0GKj7EJ4N8k/jXRxlyg+LFIYzMgAAAANnaXQAAAAOc3NoLWNvbm5lY3Rpb24AAAAJcHVibGlja2V5AQAAABNlY2RzYS1zaGEyLW5pc3RwMjU2AAAAaAAAABNlY2RzYS1zaGEyLW5pc3RwMjU2AAAACG5pc3RwMjU2AAAAQQSszpFIlSRHAAjLQHfV+8WpW3NBWGcoW5r9nbFpeCD9hliIvkXLGh0DcPpwCEPAihGJi55dFSw6eRH/CjIYCMtPAAAAAA==")!
+        }
+
+        enum Responses {
+            static let requestIdentitiesEmpty = Data(base64Encoded: "AAAABQwAAAAA")!
+            static let requestIdentitiesMultiple = Data(base64Encoded: "AAABKwwAAAACAAAAaAAAABNlY2RzYS1zaGEyLW5pc3RwMjU2AAAACG5pc3RwMjU2AAAAQQSszpFIlSRHAAjLQHfV+8WpW3NBWGcoW5r9nbFpeCD9hliIvkXLGh0DcPpwCEPAihGJi55dFSw6eRH/CjIYCMtPAAAAE2VjZHNhLXNoYTItbmlzdHAyNTYAAACIAAAAE2VjZHNhLXNoYTItbmlzdHAzODQAAAAIbmlzdHAzODQAAABhBLKSzA5q3jCb3q0JKigvcxfWVGrJ+bklpG0Zc9YzUwrbsh9SipvlSJi+sHQI+O0m88DOpRBAtuAHX60euD/Yv250tovN7/+MEFbXGZ/hLdd0BoFpWbLfJcQj806KJGlcDAAAABNlY2RzYS1zaGEyLW5pc3RwMzg0")!
+            static let requestFailure = Data(base64Encoded: "AAAAAQU=")!
+        }
+
+        enum Secrets {
+            static let ecdsa256Secret =  Stub.Secret(keySize: 256, publicKey: Data(base64Encoded: "BKzOkUiVJEcACMtAd9X7xalbc0FYZyhbmv2dsWl4IP2GWIi+RcsaHQNw+nAIQ8CKEYmLnl0VLDp5Ef8KMhgIy08=")!, privateKey: Data(base64Encoded: "BKzOkUiVJEcACMtAd9X7xalbc0FYZyhbmv2dsWl4IP2GWIi+RcsaHQNw+nAIQ8CKEYmLnl0VLDp5Ef8KMhgIy09nw780wy/TSfUmzj15iJkV234AaCLNl+H8qFL6qK8VIg==")!)
+            static let ecdsa384Secret =  Stub.Secret(keySize: 384, publicKey: Data(base64Encoded: "BLKSzA5q3jCb3q0JKigvcxfWVGrJ+bklpG0Zc9YzUwrbsh9SipvlSJi+sHQI+O0m88DOpRBAtuAHX60euD/Yv250tovN7/+MEFbXGZ/hLdd0BoFpWbLfJcQj806KJGlcDA==")!, privateKey: Data(base64Encoded: "BLKSzA5q3jCb3q0JKigvcxfWVGrJ+bklpG0Zc9YzUwrbsh9SipvlSJi+sHQI+O0m88DOpRBAtuAHX60euD/Yv250tovN7/+MEFbXGZ/hLdd0BoFpWbLfJcQj806KJGlcDHNapAOzrt9E+9QC4/KYoXS7Uw4pmdAz53uIj02tttiq3c0ZyIQ7XoscWWRqRrz8Kw==")!)
+        }
+
+    }
+
+}

SecretAgentKitTests/SecretAgentKitTests.swift

@@ -1,19 +0,0 @@
-//
-//  SecretAgentKitTests.swift
-//  SecretAgentKitTests
-//
-//  Created by Max Goedjen on 2/22/20.
-//  Copyright © 2020 Max Goedjen. All rights reserved.
-//
-
-import XCTest
-@testable import SecretAgentKit
-
-class SecretAgentKitTests: XCTestCase {
-
-    func testExample() throws {
-        // This is an example of a functional test case.
-        // Use XCTAssert and related functions to verify your tests produce the correct results.
-    }
-
-}

SecretAgentKitTests/StubFileHandleReader.swift

@@ -0,0 +1,14 @@
+import SecretAgentKit
+import AppKit
+
+struct StubFileHandleReader: FileHandleReader {
+
+    let availableData: Data
+    var fileDescriptor: Int32 {
+        NSWorkspace.shared.runningApplications.filter({ $0.localizedName == "Finder" }).first!.processIdentifier
+    }
+    var pidOfConnectedProcess: Int32 {
+        fileDescriptor
+    }
+
+}

SecretAgentKitTests/StubFileHandleWriter.swift

@@ -0,0 +1,11 @@
+import SecretAgentKit
+
+class StubFileHandleWriter: FileHandleWriter {
+
+    var data = Data()
+
+    func write(_ data: Data) {
+        self.data.append(data)
+    }
+
+}

SecretAgentKitTests/StubStore.swift

@@ -0,0 +1,113 @@
+import SecretKit
+import CryptoKit
+
+struct Stub {}
+
+extension Stub {
+
+    public class Store: SecretStore {
+
+        public let isAvailable = true
+        public let id = UUID()
+        public let name = "Stub"
+        public var secrets: [Secret] = []
+        public var shouldThrow = false
+
+        public init() {
+//            try! create(size: 256)
+//            try! create(size: 384)
+        }
+
+        public func create(size: Int) throws {
+            let flags: SecAccessControlCreateFlags = []
+            let access =
+                SecAccessControlCreateWithFlags(kCFAllocatorDefault,
+                                                kSecAttrAccessibleWhenUnlockedThisDeviceOnly,
+                                                flags,
+                                                nil) as Any
+
+            let attributes = [
+                kSecAttrLabel: name,
+                kSecAttrKeyType: kSecAttrKeyTypeECSECPrimeRandom,
+                kSecAttrKeySizeInBits: size,
+                kSecPrivateKeyAttrs: [
+                    kSecAttrIsPermanent: true,
+                    kSecAttrAccessControl: access
+                ]
+                ] as CFDictionary
+
+            var privateKey: SecKey! = nil
+            var publicKey: SecKey! = nil
+            SecKeyGeneratePair(attributes, &publicKey, &privateKey)
+            let publicAttributes = SecKeyCopyAttributes(publicKey) as! [CFString: Any]
+            let privateAttributes = SecKeyCopyAttributes(privateKey) as! [CFString: Any]
+            let publicData = (publicAttributes[kSecValueData] as! Data)
+            let privateData = (privateAttributes[kSecValueData] as! Data)
+            let secret = Secret(keySize: size, publicKey: publicData, privateKey: privateData)
+            print(secret)
+            print("Public Key OpenSSH: \(OpenSSHKeyWriter().openSSHString(secret: secret))")
+        }
+
+        public func sign(data: Data, with secret: Secret) throws -> Data {
+            guard !shouldThrow else {
+                throw NSError()
+            }
+            let privateKey = SecKeyCreateWithData(secret.privateKey as CFData, [
+                kSecAttrKeyType: kSecAttrKeyTypeECSECPrimeRandom,
+                kSecAttrKeySizeInBits: secret.keySize,
+                kSecAttrKeyClass: kSecAttrKeyClassPrivate
+                ] as CFDictionary
+                , nil)!
+            let signatureAlgorithm: SecKeyAlgorithm
+            switch secret.keySize {
+            case 256:
+                signatureAlgorithm = .ecdsaSignatureMessageX962SHA256
+            case 384:
+                signatureAlgorithm = .ecdsaSignatureMessageX962SHA384
+            default:
+                fatalError()
+            }
+            return SecKeyCreateSignature(privateKey, signatureAlgorithm, data as CFData, nil)! as Data
+        }
+
+    }
+
+}
+
+extension Stub {
+
+    struct Secret: SecretKit.Secret, CustomDebugStringConvertible {
+
+        let id = UUID().uuidString.data(using: .utf8)!
+        let name = UUID().uuidString
+        let algorithm = Algorithm.ellipticCurve
+
+        let keySize: Int
+        let publicKey: Data
+        let privateKey: Data
+
+        init(keySize: Int, publicKey: Data, privateKey: Data) {
+            self.keySize = keySize
+            self.publicKey = publicKey
+            self.privateKey = privateKey
+        }
+
+        var debugDescription: String {
+            """
+            Key Size \(keySize)
+            Private: \(privateKey.base64EncodedString())
+            Public: \(publicKey.base64EncodedString())
+            """
+        }
+
+    }
+
+}
+
+
+extension Stub.Store {
+
+    struct StubError: Error {
+    }
+
+}

SecretAgentKitTests/StubWitness.swift

@@ -0,0 +1,32 @@
+import SecretKit
+import SecretAgentKit
+
+struct StubWitness {
+
+    let speakNow: (AnySecret, SigningRequestProvenance) -> Bool
+    let witness: (AnySecret, SigningRequestProvenance) -> ()
+
+}
+
+extension StubWitness: SigningWitness {
+
+    func speakNowOrForeverHoldYourPeace(forAccessTo secret: AnySecret, by provenance: SigningRequestProvenance) throws {
+        let objection = speakNow(secret, provenance)
+        if objection {
+            throw TheresMyChance()
+        }
+    }
+
+    func witness(accessTo secret: AnySecret, by provenance: SigningRequestProvenance) throws {
+        witness(secret, provenance)
+    }
+
+}
+
+extension StubWitness {
+
+    struct TheresMyChance: Error {
+
+    }
+
+}

SecretKit/Common/OpenSSH/OpenSSHReader.swift

@@ -8,7 +8,7 @@ public class OpenSSHReader {
         remaining = Data(data)
     }
 
-    public func readNextChunk() throws -> Data {
+    public func readNextChunk() -> Data {
         let lengthRange = 0..<(UInt32.bitWidth/8)
         let lengthChunk = remaining[lengthRange]
         remaining.removeSubrange(lengthRange)

SecretKit/Common/SecretStoreList.swift

@@ -20,6 +20,10 @@ public class SecretStoreList: ObservableObject {
         addInternal(store: modifiable)
     }
 
+    public var anyAvailable: Bool {
+        stores.reduce(false, { $0 || $1.isAvailable })
+    }
+
 }
 
 extension SecretStoreList {

SecretKit/Info.plist

@@ -19,6 +19,6 @@
 	<key>CFBundleVersion</key>
 	<string>$(CURRENT_PROJECT_VERSION)</string>
 	<key>NSHumanReadableCopyright</key>
-	<string>Copyright © 2020 Max Goedjen. All rights reserved.</string>
+	<string>$(PRODUCT_NAME) is MIT Licensed.</string>
 </dict>
 </plist>

SecretKit/Secret.swift

@@ -7,7 +7,7 @@ public protocol Secret: Identifiable, Hashable {
 
 }
 
-public enum Algorithm {
+public enum Algorithm: Hashable {
     case ellipticCurve
     public init(secAttr: NSNumber) {
         let secAttrString = secAttr.stringValue as CFString

SecretKit/SecretKit.h

@@ -1,11 +1,3 @@
-//
-//  SecretKit.h
-//  SecretKit
-//
-//  Created by Max Goedjen on 2/18/20.
-//  Copyright © 2020 Max Goedjen. All rights reserved.
-//
-
 #import <Foundation/Foundation.h>
 
 //! Project version number for SecretKit.

SecretKitTests/AnySecretTests.swift

@@ -0,0 +1,17 @@
+import Foundation
+import XCTest
+@testable import SecretKit
+
+class AnySecretTests: XCTestCase {
+
+    func testEraser() {
+        let secret = SmartCard.Secret(id: UUID().uuidString.data(using: .utf8)!, name: "Name", algorithm: .ellipticCurve, keySize: 256, publicKey: UUID().uuidString.data(using: .utf8)!)
+        let erased = AnySecret(secret)
+        XCTAssert(erased.id == secret.id as AnyHashable)
+        XCTAssert(erased.name == secret.name)
+        XCTAssert(erased.algorithm == secret.algorithm)
+        XCTAssert(erased.keySize == secret.keySize)
+        XCTAssert(erased.publicKey == secret.publicKey)
+    }
+
+}

SecretKitTests/OpenSSHReaderTests.swift

@@ -0,0 +1,25 @@
+import Foundation
+import XCTest
+@testable import SecretKit
+
+class OpenSSHReaderTests: XCTestCase {
+
+    func testSignatureRequest() {
+        let reader = OpenSSHReader(data: Constants.signatureRequest)
+        let hash = reader.readNextChunk()
+        XCTAssert(hash == Data(base64Encoded: "AAAAE2VjZHNhLXNoYTItbmlzdHAzODQAAAAIbmlzdHAzODQAAABhBEqCbkJbOHy5S1wVCaJoKPmpS0egM4frMqllgnlRRQ/Uvnn6EVS8oV03cPA2Bz0EdESyRKA/sbmn0aBtgjIwGELxu45UXEW1TEz6TxyS0u3vuIqR3Wo1CrQWRDnkrG/pBQ=="))
+        let dataToSign = reader.readNextChunk()
+        XCTAssert(dataToSign == Data(base64Encoded: "AAAAICi5xf1ixOestUlxdjvt/BDcM+rzhwy7Vo8cW5YcxA8+MgAAAANnaXQAAAAOc3NoLWNvbm5lY3Rpb24AAAAJcHVibGlja2V5AQAAABNlY2RzYS1zaGEyLW5pc3RwMzg0AAAAiAAAABNlY2RzYS1zaGEyLW5pc3RwMzg0AAAACG5pc3RwMzg0AAAAYQRKgm5CWzh8uUtcFQmiaCj5qUtHoDOH6zKpZYJ5UUUP1L55+hFUvKFdN3DwNgc9BHREskSgP7G5p9GgbYIyMBhC8buOVFxFtUxM+k8cktLt77iKkd1qNQq0FkQ55Kxv6QU="))
+        let empty = reader.readNextChunk()
+        XCTAssert(empty.isEmpty)
+    }
+
+}
+
+extension OpenSSHReaderTests {
+
+    enum Constants {
+        static let signatureRequest = Data(base64Encoded: "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")!
+    }
+
+}

Secretive.xcodeproj/project.pbxproj

@@ -27,17 +27,29 @@
 		50617DD023FCED2C0099B055 /* SecureEnclave.swift in Sources */ = {isa = PBXBuildFile; fileRef = 50617DCF23FCED2C0099B055 /* SecureEnclave.swift */; };
 		50617DD223FCEFA90099B055 /* PreviewStore.swift in Sources */ = {isa = PBXBuildFile; fileRef = 50617DD123FCEFA90099B055 /* PreviewStore.swift */; };
 		506772C72424784600034DED /* Credits.rtf in Resources */ = {isa = PBXBuildFile; fileRef = 506772C62424784600034DED /* Credits.rtf */; };
+		506772C92425BB8500034DED /* NoStoresView.swift in Sources */ = {isa = PBXBuildFile; fileRef = 506772C82425BB8500034DED /* NoStoresView.swift */; };
+		506772FF2426F3F400034DED /* Brief.h in Headers */ = {isa = PBXBuildFile; fileRef = 506772FD2426F3F400034DED /* Brief.h */; settings = {ATTRIBUTES = (Public, ); }; };
+		506773022426F3F400034DED /* Brief.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 506772FB2426F3F400034DED /* Brief.framework */; };
+		506773032426F3F400034DED /* Brief.framework in Embed Frameworks */ = {isa = PBXBuildFile; fileRef = 506772FB2426F3F400034DED /* Brief.framework */; settings = {ATTRIBUTES = (CodeSignOnCopy, RemoveHeadersOnCopy, ); }; };
+		506773092426F3FD00034DED /* Updater.swift in Sources */ = {isa = PBXBuildFile; fileRef = 506773082426F3FD00034DED /* Updater.swift */; };
+		5067730C2426F40E00034DED /* Brief.framework in Embed Frameworks */ = {isa = PBXBuildFile; fileRef = 506772FB2426F3F400034DED /* Brief.framework */; settings = {ATTRIBUTES = (CodeSignOnCopy, RemoveHeadersOnCopy, ); }; };
+		5067730E242701BA00034DED /* OpenSSHReaderTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = 5067730D242701BA00034DED /* OpenSSHReaderTests.swift */; };
+		506773102427057600034DED /* AnySecretTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = 5067730F2427057600034DED /* AnySecretTests.swift */; };
 		5068389E241471CD00F55094 /* SecretStoreList.swift in Sources */ = {isa = PBXBuildFile; fileRef = 5068389D241471CD00F55094 /* SecretStoreList.swift */; };
 		506838A12415EA5600F55094 /* AnySecret.swift in Sources */ = {isa = PBXBuildFile; fileRef = 506838A02415EA5600F55094 /* AnySecret.swift */; };
 		506838A32415EA5D00F55094 /* AnySecretStore.swift in Sources */ = {isa = PBXBuildFile; fileRef = 506838A22415EA5D00F55094 /* AnySecretStore.swift */; };
 		506AB87E2412334700335D91 /* SecretAgent.app in CopyFiles */ = {isa = PBXBuildFile; fileRef = 50A3B78A24026B7500D209EA /* SecretAgent.app */; settings = {ATTRIBUTES = (RemoveHeadersOnCopy, ); }; };
-		50731666241DF8660023809E /* Updater.swift in Sources */ = {isa = PBXBuildFile; fileRef = 50731665241DF8660023809E /* Updater.swift */; };
 		50731669241E00C20023809E /* NoticeView.swift in Sources */ = {isa = PBXBuildFile; fileRef = 50731668241E00C20023809E /* NoticeView.swift */; };
 		507CE4ED2420A3C70029F750 /* Agent.swift in Sources */ = {isa = PBXBuildFile; fileRef = 50A3B79F24026B9900D209EA /* Agent.swift */; };
 		507CE4EE2420A3CA0029F750 /* SocketController.swift in Sources */ = {isa = PBXBuildFile; fileRef = 50A3B79D24026B9900D209EA /* SocketController.swift */; };
 		507CE4F02420A4C50029F750 /* SigningWitness.swift in Sources */ = {isa = PBXBuildFile; fileRef = 507CE4EF2420A4C50029F750 /* SigningWitness.swift */; };
 		507CE4F42420A8C10029F750 /* SigningRequestProvenance.swift in Sources */ = {isa = PBXBuildFile; fileRef = 507CE4F32420A8C10029F750 /* SigningRequestProvenance.swift */; };
 		507CE4F62420A96F0029F750 /* SigningRequestTracer.swift in Sources */ = {isa = PBXBuildFile; fileRef = 507CE4F52420A96F0029F750 /* SigningRequestTracer.swift */; };
+		507EE34224281E12003C4FE3 /* FileHandleProtocols.swift in Sources */ = {isa = PBXBuildFile; fileRef = 507EE34124281E12003C4FE3 /* FileHandleProtocols.swift */; };
+		507EE34624281F89003C4FE3 /* StubFileHandleReader.swift in Sources */ = {isa = PBXBuildFile; fileRef = 507EE34524281F89003C4FE3 /* StubFileHandleReader.swift */; };
+		507EE34824281FB8003C4FE3 /* StubFileHandleWriter.swift in Sources */ = {isa = PBXBuildFile; fileRef = 507EE34724281FB8003C4FE3 /* StubFileHandleWriter.swift */; };
+		507EE34A2428263B003C4FE3 /* StubStore.swift in Sources */ = {isa = PBXBuildFile; fileRef = 507EE3492428263B003C4FE3 /* StubStore.swift */; };
+		507EE34E2428784F003C4FE3 /* StubWitness.swift in Sources */ = {isa = PBXBuildFile; fileRef = 507EE34D2428784F003C4FE3 /* StubWitness.swift */; };
 		508A58AA241E06B40069DC07 /* PreviewUpdater.swift in Sources */ = {isa = PBXBuildFile; fileRef = 508A58A9241E06B40069DC07 /* PreviewUpdater.swift */; };
 		508A58B3241ED2180069DC07 /* AgentStatusChecker.swift in Sources */ = {isa = PBXBuildFile; fileRef = 508A58B2241ED2180069DC07 /* AgentStatusChecker.swift */; };
 		508A58B5241ED48F0069DC07 /* PreviewAgentStatusChecker.swift in Sources */ = {isa = PBXBuildFile; fileRef = 508A58B4241ED48F0069DC07 /* PreviewAgentStatusChecker.swift */; };
@@ -49,7 +61,7 @@
 		5099A02B23FE352C0062B6F2 /* SmartCardSecret.swift in Sources */ = {isa = PBXBuildFile; fileRef = 5099A02A23FE352C0062B6F2 /* SmartCardSecret.swift */; };
 		5099A02E23FE56E10062B6F2 /* OpenSSHKeyWriter.swift in Sources */ = {isa = PBXBuildFile; fileRef = 5099A02D23FE56E10062B6F2 /* OpenSSHKeyWriter.swift */; };
 		5099A075240242BA0062B6F2 /* SecretAgentKit.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 5099A06C240242BA0062B6F2 /* SecretAgentKit.framework */; };
-		5099A07C240242BA0062B6F2 /* SecretAgentKitTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = 5099A07B240242BA0062B6F2 /* SecretAgentKitTests.swift */; };
+		5099A07C240242BA0062B6F2 /* AgentTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = 5099A07B240242BA0062B6F2 /* AgentTests.swift */; };
 		5099A07E240242BA0062B6F2 /* SecretAgentKit.h in Headers */ = {isa = PBXBuildFile; fileRef = 5099A06E240242BA0062B6F2 /* SecretAgentKit.h */; settings = {ATTRIBUTES = (Public, ); }; };
 		5099A08A240242C20062B6F2 /* SSHAgentProtocol.swift in Sources */ = {isa = PBXBuildFile; fileRef = 5099A089240242C20062B6F2 /* SSHAgentProtocol.swift */; };
 		50A3B79124026B7600D209EA /* Assets.xcassets in Resources */ = {isa = PBXBuildFile; fileRef = 50A3B79024026B7600D209EA /* Assets.xcassets */; };
@@ -102,6 +114,20 @@
 			remoteGlobalIDString = 50617DA723FCE4AB0099B055;
 			remoteInfo = SecretKit;
 		};
+		506773002426F3F400034DED /* PBXContainerItemProxy */ = {
+			isa = PBXContainerItemProxy;
+			containerPortal = 50617D7723FCE48D0099B055 /* Project object */;
+			proxyType = 1;
+			remoteGlobalIDString = 506772FA2426F3F400034DED;
+			remoteInfo = Brief;
+		};
+		5067730A2426F40A00034DED /* PBXContainerItemProxy */ = {
+			isa = PBXContainerItemProxy;
+			containerPortal = 50617D7723FCE48D0099B055 /* Project object */;
+			proxyType = 1;
+			remoteGlobalIDString = 506772FA2426F3F400034DED;
+			remoteInfo = Brief;
+		};
 		507CE4F12420A6B50029F750 /* PBXContainerItemProxy */ = {
 			isa = PBXContainerItemProxy;
 			containerPortal = 50617D7723FCE48D0099B055 /* Project object */;
@@ -126,6 +152,7 @@
 			dstSubfolderSpec = 10;
 			files = (
 				50617DBE23FCE4AB0099B055 /* SecretKit.framework in Embed Frameworks */,
+				506773032426F3F400034DED /* Brief.framework in Embed Frameworks */,
 			);
 			name = "Embed Frameworks";
 			runOnlyForDeploymentPostprocessing = 0;
@@ -156,6 +183,7 @@
 			dstPath = "";
 			dstSubfolderSpec = 10;
 			files = (
+				5067730C2426F40E00034DED /* Brief.framework in Embed Frameworks */,
 				50A5C18D240E4B4B00E2996C /* SecretAgentKit.framework in Embed Frameworks */,
 				50A5C190240E4B4C00E2996C /* SecretKit.framework in Embed Frameworks */,
 			);
@@ -201,14 +229,25 @@
 		50617DCF23FCED2C0099B055 /* SecureEnclave.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = SecureEnclave.swift; sourceTree = "<group>"; };
 		50617DD123FCEFA90099B055 /* PreviewStore.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = PreviewStore.swift; sourceTree = "<group>"; };
 		506772C62424784600034DED /* Credits.rtf */ = {isa = PBXFileReference; lastKnownFileType = text.rtf; path = Credits.rtf; sourceTree = "<group>"; };
+		506772C82425BB8500034DED /* NoStoresView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = NoStoresView.swift; sourceTree = "<group>"; };
+		506772FB2426F3F400034DED /* Brief.framework */ = {isa = PBXFileReference; explicitFileType = wrapper.framework; includeInIndex = 0; path = Brief.framework; sourceTree = BUILT_PRODUCTS_DIR; };
+		506772FD2426F3F400034DED /* Brief.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = Brief.h; sourceTree = "<group>"; };
+		506772FE2426F3F400034DED /* Info.plist */ = {isa = PBXFileReference; lastKnownFileType = text.plist.xml; path = Info.plist; sourceTree = "<group>"; };
+		506773082426F3FD00034DED /* Updater.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = Updater.swift; sourceTree = "<group>"; };
+		5067730D242701BA00034DED /* OpenSSHReaderTests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = OpenSSHReaderTests.swift; sourceTree = "<group>"; };
+		5067730F2427057600034DED /* AnySecretTests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = AnySecretTests.swift; sourceTree = "<group>"; };
 		5068389D241471CD00F55094 /* SecretStoreList.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = SecretStoreList.swift; sourceTree = "<group>"; };
 		506838A02415EA5600F55094 /* AnySecret.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = AnySecret.swift; sourceTree = "<group>"; };
 		506838A22415EA5D00F55094 /* AnySecretStore.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = AnySecretStore.swift; sourceTree = "<group>"; };
-		50731665241DF8660023809E /* Updater.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = Updater.swift; sourceTree = "<group>"; };
 		50731668241E00C20023809E /* NoticeView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = NoticeView.swift; sourceTree = "<group>"; };
 		507CE4EF2420A4C50029F750 /* SigningWitness.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = SigningWitness.swift; sourceTree = "<group>"; };
 		507CE4F32420A8C10029F750 /* SigningRequestProvenance.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = SigningRequestProvenance.swift; sourceTree = "<group>"; };
 		507CE4F52420A96F0029F750 /* SigningRequestTracer.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = SigningRequestTracer.swift; sourceTree = "<group>"; };
+		507EE34124281E12003C4FE3 /* FileHandleProtocols.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = FileHandleProtocols.swift; sourceTree = "<group>"; };
+		507EE34524281F89003C4FE3 /* StubFileHandleReader.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = StubFileHandleReader.swift; sourceTree = "<group>"; };
+		507EE34724281FB8003C4FE3 /* StubFileHandleWriter.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = StubFileHandleWriter.swift; sourceTree = "<group>"; };
+		507EE3492428263B003C4FE3 /* StubStore.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = StubStore.swift; sourceTree = "<group>"; };
+		507EE34D2428784F003C4FE3 /* StubWitness.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = StubWitness.swift; sourceTree = "<group>"; };
 		508A58A9241E06B40069DC07 /* PreviewUpdater.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = PreviewUpdater.swift; sourceTree = "<group>"; };
 		508A58AB241E121B0069DC07 /* Config.xcconfig */ = {isa = PBXFileReference; lastKnownFileType = text.xcconfig; path = Config.xcconfig; sourceTree = "<group>"; };
 		508A58B2241ED2180069DC07 /* AgentStatusChecker.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = AgentStatusChecker.swift; sourceTree = "<group>"; };
@@ -223,7 +262,7 @@
 		5099A06E240242BA0062B6F2 /* SecretAgentKit.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = SecretAgentKit.h; sourceTree = "<group>"; };
 		5099A06F240242BA0062B6F2 /* Info.plist */ = {isa = PBXFileReference; lastKnownFileType = text.plist.xml; path = Info.plist; sourceTree = "<group>"; };
 		5099A074240242BA0062B6F2 /* SecretAgentKitTests.xctest */ = {isa = PBXFileReference; explicitFileType = wrapper.cfbundle; includeInIndex = 0; path = SecretAgentKitTests.xctest; sourceTree = BUILT_PRODUCTS_DIR; };
-		5099A07B240242BA0062B6F2 /* SecretAgentKitTests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = SecretAgentKitTests.swift; sourceTree = "<group>"; };
+		5099A07B240242BA0062B6F2 /* AgentTests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = AgentTests.swift; sourceTree = "<group>"; };
 		5099A07D240242BA0062B6F2 /* Info.plist */ = {isa = PBXFileReference; lastKnownFileType = text.plist.xml; path = Info.plist; sourceTree = "<group>"; };
 		5099A089240242C20062B6F2 /* SSHAgentProtocol.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = SSHAgentProtocol.swift; sourceTree = "<group>"; };
 		50A3B78A24026B7500D209EA /* SecretAgent.app */ = {isa = PBXFileReference; explicitFileType = wrapper.application; includeInIndex = 0; path = SecretAgent.app; sourceTree = BUILT_PRODUCTS_DIR; };
@@ -247,6 +286,7 @@
 			buildActionMask = 2147483647;
 			files = (
 				50617DBD23FCE4AB0099B055 /* SecretKit.framework in Frameworks */,
+				506773022426F3F400034DED /* Brief.framework in Frameworks */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};
@@ -272,6 +312,13 @@
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};
+		506772F82426F3F400034DED /* Frameworks */ = {
+			isa = PBXFrameworksBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+		};
 		5099A069240242BA0062B6F2 /* Frameworks */ = {
 			isa = PBXFrameworksBuildPhase;
 			buildActionMask = 2147483647;
@@ -310,6 +357,7 @@
 				5099A06D240242BA0062B6F2 /* SecretAgentKit */,
 				5099A07A240242BA0062B6F2 /* SecretAgentKitTests */,
 				508A58AF241E144C0069DC07 /* Config */,
+				506772FC2426F3F400034DED /* Brief */,
 				50617D8023FCE48E0099B055 /* Products */,
 				5099A08B240243730062B6F2 /* Frameworks */,
 			);
@@ -325,6 +373,7 @@
 				5099A06C240242BA0062B6F2 /* SecretAgentKit.framework */,
 				5099A074240242BA0062B6F2 /* SecretAgentKitTests.xctest */,
 				50A3B78A24026B7500D209EA /* SecretAgent.app */,
+				506772FB2426F3F400034DED /* Brief.framework */,
 			);
 			name = Products;
 			sourceTree = "<group>";
@@ -383,6 +432,8 @@
 			isa = PBXGroup;
 			children = (
 				50524B432420969D008DBD97 /* OpenSSHWriterTests.swift */,
+				5067730D242701BA00034DED /* OpenSSHReaderTests.swift */,
+				5067730F2427057600034DED /* AnySecretTests.swift */,
 				50617DB923FCE4AB0099B055 /* Info.plist */,
 			);
 			path = SecretKitTests;
@@ -398,6 +449,16 @@
 			path = SecureEnclave;
 			sourceTree = "<group>";
 		};
+		506772FC2426F3F400034DED /* Brief */ = {
+			isa = PBXGroup;
+			children = (
+				506773082426F3FD00034DED /* Updater.swift */,
+				506772FD2426F3F400034DED /* Brief.h */,
+				506772FE2426F3F400034DED /* Info.plist */,
+			);
+			path = Brief;
+			sourceTree = "<group>";
+		};
 		5068389F2415EA4F00F55094 /* Erasers */ = {
 			isa = PBXGroup;
 			children = (
@@ -434,6 +495,7 @@
 				5099A02323FD2AAA0062B6F2 /* CreateSecretView.swift */,
 				50B8550C24138C4F009958AC /* DeleteSecretView.swift */,
 				50BB046A2418AAAE00D6E079 /* EmptyStoreView.swift */,
+				506772C82425BB8500034DED /* NoStoresView.swift */,
 				50C385A8240B636500AF2719 /* SetupView.swift */,
 			);
 			path = Views;
@@ -442,7 +504,6 @@
 		508A58B1241ED1EA0069DC07 /* Controllers */ = {
 			isa = PBXGroup;
 			children = (
-				50731665241DF8660023809E /* Updater.swift */,
 				508A58B2241ED2180069DC07 /* AgentStatusChecker.swift */,
 			);
 			path = Controllers;
@@ -478,6 +539,7 @@
 				507CE4F32420A8C10029F750 /* SigningRequestProvenance.swift */,
 				507CE4F52420A96F0029F750 /* SigningRequestTracer.swift */,
 				50A3B79F24026B9900D209EA /* Agent.swift */,
+				507EE34124281E12003C4FE3 /* FileHandleProtocols.swift */,
 				5099A06F240242BA0062B6F2 /* Info.plist */,
 			);
 			path = SecretAgentKit;
@@ -486,7 +548,11 @@
 		5099A07A240242BA0062B6F2 /* SecretAgentKitTests */ = {
 			isa = PBXGroup;
 			children = (
-				5099A07B240242BA0062B6F2 /* SecretAgentKitTests.swift */,
+				5099A07B240242BA0062B6F2 /* AgentTests.swift */,
+				507EE34524281F89003C4FE3 /* StubFileHandleReader.swift */,
+				507EE34724281FB8003C4FE3 /* StubFileHandleWriter.swift */,
+				507EE34D2428784F003C4FE3 /* StubWitness.swift */,
+				507EE3492428263B003C4FE3 /* StubStore.swift */,
 				5099A07D240242BA0062B6F2 /* Info.plist */,
 			);
 			path = SecretAgentKitTests;
@@ -532,6 +598,14 @@
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};
+		506772F62426F3F400034DED /* Headers */ = {
+			isa = PBXHeadersBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+				506772FF2426F3F400034DED /* Brief.h in Headers */,
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+		};
 		5099A067240242BA0062B6F2 /* Headers */ = {
 			isa = PBXHeadersBuildPhase;
 			buildActionMask = 2147483647;
@@ -557,6 +631,7 @@
 			);
 			dependencies = (
 				50617DBC23FCE4AB0099B055 /* PBXTargetDependency */,
+				506773012426F3F400034DED /* PBXTargetDependency */,
 			);
 			name = Secretive;
 			productName = Secretive;
@@ -618,6 +693,24 @@
 			productReference = 50617DB023FCE4AB0099B055 /* SecretKitTests.xctest */;
 			productType = "com.apple.product-type.bundle.unit-test";
 		};
+		506772FA2426F3F400034DED /* Brief */ = {
+			isa = PBXNativeTarget;
+			buildConfigurationList = 506773042426F3F400034DED /* Build configuration list for PBXNativeTarget "Brief" */;
+			buildPhases = (
+				506772F62426F3F400034DED /* Headers */,
+				506772F72426F3F400034DED /* Sources */,
+				506772F82426F3F400034DED /* Frameworks */,
+				506772F92426F3F400034DED /* Resources */,
+			);
+			buildRules = (
+			);
+			dependencies = (
+			);
+			name = Brief;
+			productName = Brief;
+			productReference = 506772FB2426F3F400034DED /* Brief.framework */;
+			productType = "com.apple.product-type.framework";
+		};
 		5099A06B240242BA0062B6F2 /* SecretAgentKit */ = {
 			isa = PBXNativeTarget;
 			buildConfigurationList = 5099A083240242BA0062B6F2 /* Build configuration list for PBXNativeTarget "SecretAgentKit" */;
@@ -670,6 +763,7 @@
 			dependencies = (
 				5018F5492402736A002EB505 /* PBXTargetDependency */,
 				5018F54B2402736A002EB505 /* PBXTargetDependency */,
+				5067730B2426F40A00034DED /* PBXTargetDependency */,
 			);
 			name = SecretAgent;
 			productName = SecretAgent;
@@ -700,6 +794,10 @@
 					50617DAF23FCE4AB0099B055 = {
 						CreatedOnToolsVersion = 11.3;
 					};
+					506772FA2426F3F400034DED = {
+						CreatedOnToolsVersion = 11.4;
+						LastSwiftMigration = 1140;
+					};
 					5099A06B240242BA0062B6F2 = {
 						CreatedOnToolsVersion = 11.4;
 						LastSwiftMigration = 1140;
@@ -732,6 +830,7 @@
 				50617DAF23FCE4AB0099B055 /* SecretKitTests */,
 				5099A06B240242BA0062B6F2 /* SecretAgentKit */,
 				5099A073240242BA0062B6F2 /* SecretAgentKitTests */,
+				506772FA2426F3F400034DED /* Brief */,
 			);
 		};
 /* End PBXProject section */
@@ -769,6 +868,13 @@
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};
+		506772F92426F3F400034DED /* Resources */ = {
+			isa = PBXResourcesBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+		};
 		5099A06A240242BA0062B6F2 /* Resources */ = {
 			isa = PBXResourcesBuildPhase;
 			buildActionMask = 2147483647;
@@ -806,11 +912,11 @@
 				508A58B3241ED2180069DC07 /* AgentStatusChecker.swift in Sources */,
 				50C385A52407A76D00AF2719 /* SecretDetailView.swift in Sources */,
 				5099A02423FD2AAA0062B6F2 /* CreateSecretView.swift in Sources */,
-				50731666241DF8660023809E /* Updater.swift in Sources */,
 				50B8550D24138C4F009958AC /* DeleteSecretView.swift in Sources */,
 				50BB046B2418AAAE00D6E079 /* EmptyStoreView.swift in Sources */,
 				50731669241E00C20023809E /* NoticeView.swift in Sources */,
 				50617D8323FCE48E0099B055 /* AppDelegate.swift in Sources */,
+				506772C92425BB8500034DED /* NoStoresView.swift in Sources */,
 				508A58B5241ED48F0069DC07 /* PreviewAgentStatusChecker.swift in Sources */,
 				508A58AA241E06B40069DC07 /* PreviewUpdater.swift in Sources */,
 			);
@@ -849,6 +955,16 @@
 			buildActionMask = 2147483647;
 			files = (
 				50524B442420969E008DBD97 /* OpenSSHWriterTests.swift in Sources */,
+				506773102427057600034DED /* AnySecretTests.swift in Sources */,
+				5067730E242701BA00034DED /* OpenSSHReaderTests.swift in Sources */,
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+		};
+		506772F72426F3F400034DED /* Sources */ = {
+			isa = PBXSourcesBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+				506773092426F3FD00034DED /* Updater.swift in Sources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};
@@ -856,6 +972,7 @@
 			isa = PBXSourcesBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
+				507EE34224281E12003C4FE3 /* FileHandleProtocols.swift in Sources */,
 				507CE4EE2420A3CA0029F750 /* SocketController.swift in Sources */,
 				5099A08A240242C20062B6F2 /* SSHAgentProtocol.swift in Sources */,
 				507CE4ED2420A3C70029F750 /* Agent.swift in Sources */,
@@ -869,7 +986,11 @@
 			isa = PBXSourcesBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
-				5099A07C240242BA0062B6F2 /* SecretAgentKitTests.swift in Sources */,
+				507EE34E2428784F003C4FE3 /* StubWitness.swift in Sources */,
+				507EE34624281F89003C4FE3 /* StubFileHandleReader.swift in Sources */,
+				507EE34A2428263B003C4FE3 /* StubStore.swift in Sources */,
+				5099A07C240242BA0062B6F2 /* AgentTests.swift in Sources */,
+				507EE34824281FB8003C4FE3 /* StubFileHandleWriter.swift in Sources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};
@@ -910,6 +1031,16 @@
 			target = 50617DA723FCE4AB0099B055 /* SecretKit */;
 			targetProxy = 50617DBB23FCE4AB0099B055 /* PBXContainerItemProxy */;
 		};
+		506773012426F3F400034DED /* PBXTargetDependency */ = {
+			isa = PBXTargetDependency;
+			target = 506772FA2426F3F400034DED /* Brief */;
+			targetProxy = 506773002426F3F400034DED /* PBXContainerItemProxy */;
+		};
+		5067730B2426F40A00034DED /* PBXTargetDependency */ = {
+			isa = PBXTargetDependency;
+			target = 506772FA2426F3F400034DED /* Brief */;
+			targetProxy = 5067730A2426F40A00034DED /* PBXContainerItemProxy */;
+		};
 		507CE4F22420A6B50029F750 /* PBXTargetDependency */ = {
 			isa = PBXTargetDependency;
 			target = 50617DA723FCE4AB0099B055 /* SecretKit */;
@@ -1254,6 +1385,95 @@
 			};
 			name = Release;
 		};
+		506773052426F3F400034DED /* Debug */ = {
+			isa = XCBuildConfiguration;
+			buildSettings = {
+				CLANG_ENABLE_MODULES = YES;
+				CODE_SIGN_IDENTITY = "-";
+				CODE_SIGN_STYLE = Automatic;
+				COMBINE_HIDPI_IMAGES = YES;
+				CURRENT_PROJECT_VERSION = 1;
+				DEFINES_MODULE = YES;
+				DEVELOPMENT_TEAM = Z72PRUAWF6;
+				DYLIB_COMPATIBILITY_VERSION = 1;
+				DYLIB_CURRENT_VERSION = 1;
+				DYLIB_INSTALL_NAME_BASE = "@rpath";
+				INFOPLIST_FILE = Brief/Info.plist;
+				INSTALL_PATH = "$(LOCAL_LIBRARY_DIR)/Frameworks";
+				LD_RUNPATH_SEARCH_PATHS = (
+					"$(inherited)",
+					"@executable_path/../Frameworks",
+					"@loader_path/Frameworks",
+				);
+				PRODUCT_BUNDLE_IDENTIFIER = com.maxgoedjen.Brief;
+				PRODUCT_NAME = "$(TARGET_NAME:c99extidentifier)";
+				SKIP_INSTALL = YES;
+				SWIFT_OPTIMIZATION_LEVEL = "-Onone";
+				SWIFT_VERSION = 5.0;
+				VERSIONING_SYSTEM = "apple-generic";
+				VERSION_INFO_PREFIX = "";
+			};
+			name = Debug;
+		};
+		506773062426F3F400034DED /* Test */ = {
+			isa = XCBuildConfiguration;
+			buildSettings = {
+				CLANG_ENABLE_MODULES = YES;
+				CODE_SIGN_IDENTITY = "-";
+				CODE_SIGN_STYLE = Automatic;
+				COMBINE_HIDPI_IMAGES = YES;
+				CURRENT_PROJECT_VERSION = 1;
+				DEFINES_MODULE = YES;
+				DEVELOPMENT_TEAM = Z72PRUAWF6;
+				DYLIB_COMPATIBILITY_VERSION = 1;
+				DYLIB_CURRENT_VERSION = 1;
+				DYLIB_INSTALL_NAME_BASE = "@rpath";
+				INFOPLIST_FILE = Brief/Info.plist;
+				INSTALL_PATH = "$(LOCAL_LIBRARY_DIR)/Frameworks";
+				LD_RUNPATH_SEARCH_PATHS = (
+					"$(inherited)",
+					"@executable_path/../Frameworks",
+					"@loader_path/Frameworks",
+				);
+				PRODUCT_BUNDLE_IDENTIFIER = com.maxgoedjen.Brief;
+				PRODUCT_NAME = "$(TARGET_NAME:c99extidentifier)";
+				SKIP_INSTALL = YES;
+				SWIFT_OPTIMIZATION_LEVEL = "-Onone";
+				SWIFT_VERSION = 5.0;
+				VERSIONING_SYSTEM = "apple-generic";
+				VERSION_INFO_PREFIX = "";
+			};
+			name = Test;
+		};
+		506773072426F3F400034DED /* Release */ = {
+			isa = XCBuildConfiguration;
+			buildSettings = {
+				CLANG_ENABLE_MODULES = YES;
+				CODE_SIGN_IDENTITY = "-";
+				CODE_SIGN_STYLE = Automatic;
+				COMBINE_HIDPI_IMAGES = YES;
+				CURRENT_PROJECT_VERSION = 1;
+				DEFINES_MODULE = YES;
+				DEVELOPMENT_TEAM = Z72PRUAWF6;
+				DYLIB_COMPATIBILITY_VERSION = 1;
+				DYLIB_CURRENT_VERSION = 1;
+				DYLIB_INSTALL_NAME_BASE = "@rpath";
+				INFOPLIST_FILE = Brief/Info.plist;
+				INSTALL_PATH = "$(LOCAL_LIBRARY_DIR)/Frameworks";
+				LD_RUNPATH_SEARCH_PATHS = (
+					"$(inherited)",
+					"@executable_path/../Frameworks",
+					"@loader_path/Frameworks",
+				);
+				PRODUCT_BUNDLE_IDENTIFIER = com.maxgoedjen.Brief;
+				PRODUCT_NAME = "$(TARGET_NAME:c99extidentifier)";
+				SKIP_INSTALL = YES;
+				SWIFT_VERSION = 5.0;
+				VERSIONING_SYSTEM = "apple-generic";
+				VERSION_INFO_PREFIX = "";
+			};
+			name = Release;
+		};
 		508A5914241EF1A00069DC07 /* Test */ = {
 			isa = XCBuildConfiguration;
 			baseConfigurationReference = 508A58AB241E121B0069DC07 /* Config.xcconfig */;
@@ -1427,8 +1647,8 @@
 			isa = XCBuildConfiguration;
 			buildSettings = {
 				ALWAYS_EMBED_SWIFT_STANDARD_LIBRARIES = YES;
-				CODE_SIGN_IDENTITY = "-";
+				CODE_SIGN_IDENTITY = "Developer ID Application";
-				CODE_SIGN_STYLE = Automatic;
+				CODE_SIGN_STYLE = Manual;
 				COMBINE_HIDPI_IMAGES = YES;
 				DEVELOPMENT_TEAM = Z72PRUAWF6;
 				INFOPLIST_FILE = SecretKitTests/Info.plist;
@@ -1439,6 +1659,7 @@
 				);
 				PRODUCT_BUNDLE_IDENTIFIER = com.maxgoedjen.SecretKitTests;
 				PRODUCT_NAME = "$(TARGET_NAME)";
+				PROVISIONING_PROFILE_SPECIFIER = "";
 				SWIFT_VERSION = 5.0;
 			};
 			name = Test;
@@ -1477,7 +1698,8 @@
 			isa = XCBuildConfiguration;
 			buildSettings = {
 				ALWAYS_EMBED_SWIFT_STANDARD_LIBRARIES = YES;
-				CODE_SIGN_IDENTITY = "-";
+				CODE_SIGN_IDENTITY = "Developer ID Application";
+				CODE_SIGN_STYLE = Manual;
 				COMBINE_HIDPI_IMAGES = YES;
 				DEVELOPMENT_TEAM = Z72PRUAWF6;
 				INFOPLIST_FILE = SecretAgentKitTests/Info.plist;
@@ -1488,6 +1710,7 @@
 				);
 				PRODUCT_BUNDLE_IDENTIFIER = com.maxgoedjen.SecretAgentKitTests;
 				PRODUCT_NAME = "$(TARGET_NAME)";
+				PROVISIONING_PROFILE_SPECIFIER = "";
 				SWIFT_VERSION = 5.0;
 			};
 			name = Test;
@@ -1555,6 +1778,7 @@
 			isa = XCBuildConfiguration;
 			buildSettings = {
 				ALWAYS_EMBED_SWIFT_STANDARD_LIBRARIES = YES;
+				CODE_SIGN_STYLE = Automatic;
 				COMBINE_HIDPI_IMAGES = YES;
 				DEVELOPMENT_TEAM = Z72PRUAWF6;
 				INFOPLIST_FILE = SecretAgentKitTests/Info.plist;
@@ -1573,6 +1797,7 @@
 			isa = XCBuildConfiguration;
 			buildSettings = {
 				ALWAYS_EMBED_SWIFT_STANDARD_LIBRARIES = YES;
+				CODE_SIGN_STYLE = Automatic;
 				COMBINE_HIDPI_IMAGES = YES;
 				DEVELOPMENT_TEAM = Z72PRUAWF6;
 				INFOPLIST_FILE = SecretAgentKitTests/Info.plist;
@@ -1690,6 +1915,16 @@
 			defaultConfigurationIsVisible = 0;
 			defaultConfigurationName = Release;
 		};
+		506773042426F3F400034DED /* Build configuration list for PBXNativeTarget "Brief" */ = {
+			isa = XCConfigurationList;
+			buildConfigurations = (
+				506773052426F3F400034DED /* Debug */,
+				506773062426F3F400034DED /* Test */,
+				506773072426F3F400034DED /* Release */,
+			);
+			defaultConfigurationIsVisible = 0;
+			defaultConfigurationName = Release;
+		};
 		5099A083240242BA0062B6F2 /* Build configuration list for PBXNativeTarget "SecretAgentKit" */ = {
 			isa = XCConfigurationList;
 			buildConfigurations = (

Secretive/AppDelegate.swift

@@ -1,6 +1,7 @@
 import Cocoa
 import SwiftUI
 import SecretKit
+import Brief
 
 @NSApplicationMain
 class AppDelegate: NSObject, NSApplicationDelegate {
@@ -66,7 +67,7 @@ class AppDelegate: NSObject, NSApplicationDelegate {
 
     @IBAction func runSetup(sender: AnyObject?) {
         let setupWindow = NSWindow(
-            contentRect: NSRect(x: 0, y: 0, width: 480, height: 300),
+            contentRect: NSRect(x: 0, y: 0, width: 0, height: 0),
             styleMask: [.titled, .closable, .miniaturizable, .resizable, .fullSizeContentView],
             backing: .buffered, defer: false)
         let setupView = SetupView() { success in

Secretive/Credits.rtf

@@ -5,19 +5,19 @@
 \margl1440\margr1440\vieww9000\viewh8400\viewkind0
 \pard\tx720\tx1440\tx2160\tx2880\tx3600\tx4320\tx5040\tx5760\tx6119\tx6480\tx7200\tx7920\tx8640\pardirnatural\partightenfactor0
 {\field{\*\fldinst{HYPERLINK "https://github.com/maxgoedjen/secretive"}}{\fldrslt 
-\f0\fs24 \cf0 https://github.com/maxgoedjen/secretive}}
+\f0\fs24 \cf0 GitHub Repository}}
 \f0\fs24 \
 \pard\tx720\tx1440\tx2160\tx2880\tx3600\tx4320\tx5040\tx5760\tx6480\tx7200\tx7920\tx8640\pardirnatural\partightenfactor0
 \cf0 \
-GITHUB_BUILD_URL\
+{\field{\*\fldinst{HYPERLINK "GITHUB_BUILD_URL"}}{\fldrslt Build Log}}\
 \
 Special Thanks To:\
-https://github.com/bdash\
+{\field{\*\fldinst{HYPERLINK "https://github.com/bdash"}}{\fldrslt Mark Rowe}}\
-https://github.com/danielctull\
+{\field{\*\fldinst{HYPERLINK "https://github.com/danielctull"}}{\fldrslt Daniel Tull}}\
-https://github.com/davedelong\
+{\field{\*\fldinst{HYPERLINK "https://github.com/davedelong"}}{\fldrslt Dave DeLong}}\
-https://github.com/esttorhe\
+{\field{\*\fldinst{HYPERLINK "https://github.com/esttorhe"}}{\fldrslt Esteban Torres}}\
-https://github.com/joeblau\
+{\field{\*\fldinst{HYPERLINK "https://github.com/joeblau"}}{\fldrslt Joe Blau}}\
-https://github.com/marksands\
+{\field{\*\fldinst{HYPERLINK "https://github.com/marksands"}}{\fldrslt Mark Sands}}\
-https://github.com/mergesort\
+{\field{\*\fldinst{HYPERLINK "https://github.com/mergesort"}}{\fldrslt Joe Fabisevich}}\
-https://github.com/phillco\
+{\field{\*\fldinst{HYPERLINK "https://github.com/phillco"}}{\fldrslt Phil Cohen}}\
-https://github.com/zackdotcomputer}
+{\field{\*\fldinst{HYPERLINK "https://github.com/zackdotcomputer"}}{\fldrslt Zack Sheppard}}}

Secretive/Info.plist

@@ -23,7 +23,7 @@
 	<key>LSMinimumSystemVersion</key>
 	<string>$(MACOSX_DEPLOYMENT_TARGET)</string>
 	<key>NSHumanReadableCopyright</key>
-	<string>Copyright © 2020 Max Goedjen. All rights reserved.</string>
+	<string>$(PRODUCT_NAME) is MIT Licensed.</string>
 	<key>NSMainStoryboardFile</key>
 	<string>Main</string>
 	<key>NSPrincipalClass</key>

Secretive/Preview Content/PreviewUpdater.swift

@@ -1,5 +1,6 @@
 import Foundation
 import Combine
+import Brief
 
 class PreviewUpdater: UpdaterProtocol {
 

Secretive/Views/ContentView.swift

@@ -1,5 +1,6 @@
 import SwiftUI
 import SecretKit
+import Brief
 
 struct ContentView<UpdaterType: UpdaterProtocol, AgentStatusCheckerType: AgentStatusCheckerProtocol>: View {
     
@@ -20,6 +21,7 @@ struct ContentView<UpdaterType: UpdaterProtocol, AgentStatusCheckerType: AgentSt
             if !agentStatusChecker.running {
                 agentNotice()
             }
+            if storeList.anyAvailable {
             NavigationView {
                 List(selection: $active) {
                     ForEach(storeList.stores) { store in
@@ -68,7 +70,10 @@ struct ContentView<UpdaterType: UpdaterProtocol, AgentStatusCheckerType: AgentSt
                     }
                 }
             }
-        }
+            } else {
+                NoStoresView()
+            }
+        }.frame(minWidth: 640, minHeight: 320)
     }
 
     func updateNotice() -> some View {

Secretive/Views/NoStoresView.swift

@@ -0,0 +1,29 @@
+//
+//  NoStoresView.swift
+//  Secretive
+//
+//  Created by Max Goedjen on 3/20/20.
+//  Copyright © 2020 Max Goedjen. All rights reserved.
+//
+
+import SwiftUI
+
+struct NoStoresView: View {
+    var body: some View {
+        VStack {
+            Text("No Secure Storage Available").bold()
+            Text("Your Mac doesn't have a Secure Enclave, and there's not a compatible Smart Card inserted.")
+            Button(action: {
+                NSWorkspace.shared.open(URL(string: "https://www.yubico.com/products/compare-yubikey-5-series/")!)
+            }) {
+                Text("If you're looking to add one to your Mac, the YubiKey 5 Series are great.")
+            }
+        }.padding()
+    }
+}
+
+struct NoStoresView_Previews: PreviewProvider {
+    static var previews: some View {
+        NoStoresView()
+    }
+}

Secretive/Views/SetupView.swift

@@ -3,18 +3,18 @@ import SwiftUI
 import ServiceManagement
 
 struct SetupView: View {
-
+    
     var completion: ((Bool) -> Void)?
-
+    
     var body: some View {
         Form {
             SetupStepView<Spacer>(text: "Secretive needs to install a helper app to sign requests when the main app isn't running. This app is called \"SecretAgent\" and you might see it in Activity Manager from time to time.",
-                                index: 1,
+                                  index: 1,
-                                nestedView: nil,
+                                  nestedView: nil,
-                                actionText: "Install") {
+                                  actionText: "Install") {
                                     self.installLaunchAgent()
             }
-            SetupStepView(text: "You need to add a line to your shell config (.bashrc or .zshrc) telling SSH to talk to SecretAgent when it wants to authenticate. Drag this into your config file.",
+            SetupStepView(text: "Add this line to your shell config (.bashrc or .zshrc) telling SSH to talk to SecretAgent when it wants to authenticate. Drag this into your config file.",
                           index: 2,
                           nestedView: SetupStepCommandView(text: Constants.socketPrompt),
                           actionText: "Added") {
@@ -22,25 +22,25 @@ struct SetupView: View {
             }
             HStack {
                 Spacer()
-                    Button(action: { self.completion?(true) }) {
+                Button(action: { self.completion?(true) }) {
-                        Text("Finish")
+                    Text("Finish")
-                    }
+                }
                 .padding()
             }
-        }
+        }.frame(minWidth: 640, minHeight: 400)
     }
-
+    
 }
 
 struct SetupStepView<NestedViewType: View>: View {
-
+    
     let text: String
     let index: Int
     let nestedView: NestedViewType?
     @State var completed = false
     let actionText: String
     let action: (() -> Bool)
-
+    
     var body: some View {
         Section {
             HStack {
@@ -64,10 +64,8 @@ struct SetupStepView<NestedViewType: View>: View {
                     Text(text)
                         .opacity(completed ? 0.5 : 1)
                         .lineLimit(nil)
-                        .frame(idealHeight: 0, maxHeight: .infinity)
                     if nestedView != nil {
-                        Spacer()
+                        nestedView!.padding()
-                        nestedView!
                     }
                 }
                 .padding()
@@ -83,43 +81,58 @@ struct SetupStepView<NestedViewType: View>: View {
 }
 
 struct SetupStepCommandView: View {
-
+    
     let text: String
-
+    
     var body: some View {
-        Text(text)
+        VStack(alignment: .leading) {
-            .font(.system(.caption, design: .monospaced))
+            Text(text)
-            .lineLimit(nil)
+                .lineLimit(nil)
-            .frame(idealHeight: 0, maxHeight: .infinity)
+                .font(.system(.caption, design: .monospaced))
-            .padding()
+                .multilineTextAlignment(.leading)
-            .background(Color(white: 0, opacity: 0.10))
+                .frame(minHeight: 50)
-            .cornerRadius(10)
+            HStack {
-            .onDrag {
+                Spacer()
-                return NSItemProvider(item: NSData(data: self.text.data(using: .utf8)!), typeIdentifier: kUTTypeUTF8PlainText as String)
+                Button(action: copy) {
+                    Text("Copy")
+                }
+            }
+        }
+        .padding()
+        .background(Color(white: 0, opacity: 0.10))
+        .cornerRadius(10)
+        .onDrag {
+            return NSItemProvider(item: NSData(data: self.text.data(using: .utf8)!), typeIdentifier: kUTTypeUTF8PlainText as String)
+            
         }
     }
-
+    
+    func copy() {
+        NSPasteboard.general.declareTypes([.string], owner: nil)
+        NSPasteboard.general.setString(text, forType: .string)
+    }
+    
 }
 
 extension SetupView {
-
+    
     func installLaunchAgent() -> Bool {
         SMLoginItemSetEnabled("com.maxgoedjen.Secretive.SecretAgent" as CFString, true)
     }
-
+    
     func markAsDone() -> Bool {
         return true
     }
-
+    
 }
 
 extension SetupView {
-
+    
     enum Constants {
         static let socketPath = (NSHomeDirectory().replacingOccurrences(of: "com.maxgoedjen.Secretive.Host", with: "com.maxgoedjen.Secretive.SecretAgent") as NSString).appendingPathComponent("socket.ssh") as String
         static let socketPrompt = "export SSH_AUTH_SOCK=\(socketPath)"
     }
-
+    
 }
 
 #if DEBUG

SecretiveTests/SecretiveTests.swift

@@ -1,11 +1,3 @@
-//
-//  SecretiveTests.swift
-//  SecretiveTests
-//
-//  Created by Max Goedjen on 2/18/20.
-//  Copyright © 2020 Max Goedjen. All rights reserved.
-//
-
 import XCTest
 @testable import Secretive