Project public key files for use in configs (#264)

Sources/Packages/Sources/SecretKit/PublicKeyStandinFileController.swift

@@ -0,0 +1,41 @@
+import Foundation
+import OSLog
+
+/// Controller responsible for writing public keys to disk, so that they're easily accessible by scripts.
+public class PublicKeyFileStoreController {
+
+    private let logger = Logger()
+    private let directory: String
+
+    /// Initializes a PublicKeyFileStoreController.
+    public init(homeDirectory: String) {
+        directory = homeDirectory.appending("/PublicKeys")
+    }
+
+    /// Writes out the keys specified to disk.
+    /// - Parameter secrets: The Secrets to generate keys for.
+    /// - Parameter clear: Whether or not the directory should be erased before writing keys.
+    public func generatePublicKeys(for secrets: [AnySecret], clear: Bool = false) throws {
+        logger.log("Writing public keys to disk")
+        if clear {
+            try? FileManager.default.removeItem(at: URL(fileURLWithPath: directory))
+        }
+        try? FileManager.default.createDirectory(at: URL(fileURLWithPath: directory), withIntermediateDirectories: false, attributes: nil)
+        let keyWriter = OpenSSHKeyWriter()
+        for secret in secrets {
+            let path = path(for: secret)
+            guard let data = keyWriter.openSSHString(secret: secret).data(using: .utf8) else { continue }
+            FileManager.default.createFile(atPath: path, contents: data, attributes: nil)
+        }
+        logger.log("Finished writing public keys")
+    }
+
+    /// The path for a Secret's public key.
+    /// - Parameter secret: The Secret to return the path for.
+    /// - Returns: The path to the Secret's public key.
+    /// - Warning: This method returning a path does not imply that a key has been written to disk already. This method only describes where it will be written to.
+    public func path<SecretType: Secret>(for secret: SecretType) -> String {
+        directory.appending("/").appending("\(secret.name.replacingOccurrences(of: " ", with: "-")).pub")
+    }
+
+}

Sources/Packages/Sources/SmartCardSecretKit/SmartCardStore.swift

@@ -4,8 +4,6 @@ import CryptoTokenKit
 import LocalAuthentication
 import SecretKit
 
-// TODO: Might need to split this up into "sub-stores?"
-// ie, each token has its own Store.
 extension SmartCard {
 
     /// An implementation of Store backed by a Smart Card.

Sources/SecretAgent/AppDelegate.swift

@@ -18,6 +18,7 @@ class AppDelegate: NSObject, NSApplicationDelegate {
     }()
     private let updater = Updater(checkOnLaunch: false)
     private let notifier = Notifier()
+    private let publicKeyFileStoreController = PublicKeyFileStoreController(homeDirectory: NSHomeDirectory())
     private lazy var agent: Agent = {
         Agent(storeList: storeList, witness: notifier)
     }()
@@ -32,6 +33,10 @@ class AppDelegate: NSObject, NSApplicationDelegate {
         DispatchQueue.main.async {
             self.socketController.handler = self.agent.handle(reader:writer:)
         }
+        DistributedNotificationCenter.default().addObserver(forName: .secretStoreUpdated, object: nil, queue: .main) { [self] _ in
+            try? publicKeyFileStoreController.generatePublicKeys(for: storeList.stores.flatMap({ $0.secrets }), clear: true)
+        }
+        try? publicKeyFileStoreController.generatePublicKeys(for: storeList.stores.flatMap({ $0.secrets }), clear: true)
         notifier.prompt()
         updateSink = updater.$update.sink { update in
             guard let update = update else { return }
@@ -39,6 +44,5 @@ class AppDelegate: NSObject, NSApplicationDelegate {
         }
     }
 
-
 }
 

Sources/Secretive/Views/SecretDetailView.swift

@@ -6,6 +6,7 @@ struct SecretDetailView<SecretType: Secret>: View {
     @State var secret: SecretType
 
     private let keyWriter = OpenSSHKeyWriter()
+    private let publicKeyFileStoreController = PublicKeyFileStoreController(homeDirectory: NSHomeDirectory().replacingOccurrences(of: Bundle.main.hostBundleID, with: Bundle.main.agentBundleID))
     
     var body: some View {
         ScrollView {
@@ -18,6 +19,9 @@ struct SecretDetailView<SecretType: Secret>: View {
                     Spacer()
                         .frame(height: 20)
                     CopyableView(title: "Public Key", image: Image(systemName: "key"), text: keyString)
+                    Spacer()
+                        .frame(height: 20)
+                    CopyableView(title: "Public Key Path", image: Image(systemName: "lock.doc"), text: publicKeyFileStoreController.path(for: secret))
                     Spacer()
                 }
             }
@@ -40,12 +44,7 @@ struct SecretDetailView<SecretType: Secret>: View {
     var keyString: String {
         keyWriter.openSSHString(secret: secret, comment: "\(dashedKeyName)@\(dashedHostName)")
     }
-    
-    func copy() {
-        NSPasteboard.general.declareTypes([.string], owner: nil)
-        NSPasteboard.general.setString(keyString, forType: .string)
-    }
-    
+
 }
 
 #if DEBUG