Šepot — end-to-end encrypted messenger

Initial public release. Anonymous on-device identity (no phone number,
e-mail, or password), Signal-protocol cryptography (X3DH + PQXDH, Double
Ratchet, sealed sender) via libsignal, a metadata-minimizing relay,
group chats, disappearing messages, encrypted local storage, optional
Tor transport, and a UI localized into Czech, English, German, Russian,
and Italian.

Monorepo: Flutter client (app/), Rust relay + wire types (rust/),
protobuf definitions (proto/), self-host deploy (deploy/).

Licensed under AGPL-3.0 with an app-store distribution exception (§7).

app/ios/Runner/AppDelegate.swift

@@ -0,0 +1,65 @@
+import Flutter
+import UIKit
+
+@main
+@objc class AppDelegate: FlutterAppDelegate {
+  private var apnsChannel: FlutterMethodChannel?
+  // Token dorazí asynchronně z APNs; když si o něj Dart řekne dřív, podržíme ho.
+  private var pendingToken: String?
+
+  override func application(
+    _ application: UIApplication,
+    didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?
+  ) -> Bool {
+    let controller = window?.rootViewController as! FlutterViewController
+    let channel = FlutterMethodChannel(
+      name: "cz.sepot.sepot/apns", binaryMessenger: controller.binaryMessenger)
+    channel.setMethodCallHandler { [weak self] call, result in
+      switch call.method {
+      case "register":
+        // Nativní APNs registrace (bez Firebase) — token přijde v callbacku
+        application.registerForRemoteNotifications()
+        result(nil)
+      case "getToken":
+        result(self?.pendingToken)
+      default:
+        result(FlutterMethodNotImplemented)
+      }
+    }
+    apnsChannel = channel
+
+    GeneratedPluginRegistrant.register(with: self)
+    return super.application(application, didFinishLaunchingWithOptions: launchOptions)
+  }
+
+  // APNs vydal device token → předáme Dartu (ten ho pošle relayi).
+  override func application(
+    _ application: UIApplication,
+    didRegisterForRemoteNotificationsWithDeviceToken deviceToken: Data
+  ) {
+    let token = deviceToken.map { String(format: "%02x", $0) }.joined()
+    pendingToken = token
+    apnsChannel?.invokeMethod("onToken", arguments: token)
+  }
+
+  override func application(
+    _ application: UIApplication,
+    didFailToRegisterForRemoteNotificationsWithError error: Error
+  ) {
+    NSLog("APNs registrace selhala: \(error.localizedDescription)")
+  }
+
+  // Tichý „background" budíček z relaye (content-available:1). Probudí Dart,
+  // ať se připojí na WS a vyleje frontu. Obsah nikdy neneseme.
+  override func application(
+    _ application: UIApplication,
+    didReceiveRemoteNotification userInfo: [AnyHashable: Any],
+    fetchCompletionHandler completionHandler: @escaping (UIBackgroundFetchResult) -> Void
+  ) {
+    apnsChannel?.invokeMethod("onWake", arguments: nil)
+    // Dej WS chvíli na doručení; iOS background okno je krátké.
+    DispatchQueue.main.asyncAfter(deadline: .now() + 8) {
+      completionHandler(.newData)
+    }
+  }
+}

app/ios/Runner/Assets.xcassets/AppIcon.appiconset/Contents.json

@@ -0,0 +1 @@
+{"images":[{"size":"20x20","idiom":"iphone","filename":"Icon-App-20x20@2x.png","scale":"2x"},{"size":"20x20","idiom":"iphone","filename":"Icon-App-20x20@3x.png","scale":"3x"},{"size":"29x29","idiom":"iphone","filename":"Icon-App-29x29@1x.png","scale":"1x"},{"size":"29x29","idiom":"iphone","filename":"Icon-App-29x29@2x.png","scale":"2x"},{"size":"29x29","idiom":"iphone","filename":"Icon-App-29x29@3x.png","scale":"3x"},{"size":"40x40","idiom":"iphone","filename":"Icon-App-40x40@2x.png","scale":"2x"},{"size":"40x40","idiom":"iphone","filename":"Icon-App-40x40@3x.png","scale":"3x"},{"size":"57x57","idiom":"iphone","filename":"Icon-App-57x57@1x.png","scale":"1x"},{"size":"57x57","idiom":"iphone","filename":"Icon-App-57x57@2x.png","scale":"2x"},{"size":"60x60","idiom":"iphone","filename":"Icon-App-60x60@2x.png","scale":"2x"},{"size":"60x60","idiom":"iphone","filename":"Icon-App-60x60@3x.png","scale":"3x"},{"size":"20x20","idiom":"ipad","filename":"Icon-App-20x20@1x.png","scale":"1x"},{"size":"20x20","idiom":"ipad","filename":"Icon-App-20x20@2x.png","scale":"2x"},{"size":"29x29","idiom":"ipad","filename":"Icon-App-29x29@1x.png","scale":"1x"},{"size":"29x29","idiom":"ipad","filename":"Icon-App-29x29@2x.png","scale":"2x"},{"size":"40x40","idiom":"ipad","filename":"Icon-App-40x40@1x.png","scale":"1x"},{"size":"40x40","idiom":"ipad","filename":"Icon-App-40x40@2x.png","scale":"2x"},{"size":"50x50","idiom":"ipad","filename":"Icon-App-50x50@1x.png","scale":"1x"},{"size":"50x50","idiom":"ipad","filename":"Icon-App-50x50@2x.png","scale":"2x"},{"size":"72x72","idiom":"ipad","filename":"Icon-App-72x72@1x.png","scale":"1x"},{"size":"72x72","idiom":"ipad","filename":"Icon-App-72x72@2x.png","scale":"2x"},{"size":"76x76","idiom":"ipad","filename":"Icon-App-76x76@1x.png","scale":"1x"},{"size":"76x76","idiom":"ipad","filename":"Icon-App-76x76@2x.png","scale":"2x"},{"size":"83.5x83.5","idiom":"ipad","filename":"Icon-App-83.5x83.5@2x.png","scale":"2x"},{"size":"1024x1024","idiom":"ios-marketing","filename":"Icon-App-1024x1024@1x.png","scale":"1x"}],"info":{"version":1,"author":"xcode"}}

app/ios/Runner/Assets.xcassets/LaunchBackground.imageset/Contents.json

@@ -0,0 +1,22 @@
+{
+  "images" : [
+    {
+      "filename" : "background.png",
+      "idiom" : "universal"
+    },
+    {
+      "appearances" : [
+        {
+          "appearance" : "luminosity",
+          "value" : "dark"
+        }
+      ],
+      "filename" : "darkbackground.png",
+      "idiom" : "universal"
+    }
+  ],
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}

app/ios/Runner/Assets.xcassets/LaunchImage.imageset/Contents.json

@@ -0,0 +1,56 @@
+{
+  "images" : [
+    {
+      "filename" : "LaunchImage.png",
+      "idiom" : "universal",
+      "scale" : "1x"
+    },
+    {
+      "appearances" : [
+        {
+          "appearance" : "luminosity",
+          "value" : "dark"
+        }
+      ],
+      "filename" : "LaunchImageDark.png",
+      "idiom" : "universal",
+      "scale" : "1x"
+    },
+    {
+      "filename" : "LaunchImage@2x.png",
+      "idiom" : "universal",
+      "scale" : "2x"
+    },
+    {
+      "appearances" : [
+        {
+          "appearance" : "luminosity",
+          "value" : "dark"
+        }
+      ],
+      "filename" : "LaunchImageDark@2x.png",
+      "idiom" : "universal",
+      "scale" : "2x"
+    },
+    {
+      "filename" : "LaunchImage@3x.png",
+      "idiom" : "universal",
+      "scale" : "3x"
+    },
+    {
+      "appearances" : [
+        {
+          "appearance" : "luminosity",
+          "value" : "dark"
+        }
+      ],
+      "filename" : "LaunchImageDark@3x.png",
+      "idiom" : "universal",
+      "scale" : "3x"
+    }
+  ],
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}

app/ios/Runner/Assets.xcassets/LaunchImage.imageset/README.md

@@ -0,0 +1,5 @@
+# Launch Screen Assets
+
+You can customize the launch screen with your own desired assets by replacing the image files in this directory.
+
+You can also do it by opening your Flutter project's Xcode project with `open ios/Runner.xcworkspace`, selecting `Runner/Assets.xcassets` in the Project Navigator and dropping in the desired images.

app/ios/Runner/Base.lproj/LaunchScreen.storyboard

@@ -0,0 +1,44 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="12121" systemVersion="16G29" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" launchScreen="YES" colorMatched="YES" initialViewController="01J-lp-oVM">
+    <dependencies>
+        <deployment identifier="iOS"/>
+        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="12089"/>
+    </dependencies>
+    <scenes>
+        <!--View Controller-->
+        <scene sceneID="EHf-IW-A2E">
+            <objects>
+                <viewController id="01J-lp-oVM" sceneMemberID="viewController">
+                    <layoutGuides>
+                        <viewControllerLayoutGuide type="top" id="Ydg-fD-yQy"/>
+                        <viewControllerLayoutGuide type="bottom" id="xbc-2k-c8Z"/>
+                    </layoutGuides>
+                    <view key="view" contentMode="scaleToFill" id="Ze5-6b-2t3">
+                        <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
+                        <subviews>
+                            <imageView clipsSubviews="YES" userInteractionEnabled="NO" contentMode="scaleToFill" image="LaunchBackground" translatesAutoresizingMaskIntoConstraints="NO" id="tWc-Dq-wcI"/>
+                            <imageView opaque="NO" clipsSubviews="YES" multipleTouchEnabled="YES" contentMode="center" image="LaunchImage" translatesAutoresizingMaskIntoConstraints="NO" id="YRO-k0-Ey4"></imageView>
+                        </subviews>
+                        <color key="backgroundColor" red="1" green="1" blue="1" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
+                        <constraints>
+                            <constraint firstItem="YRO-k0-Ey4" firstAttribute="leading" secondItem="Ze5-6b-2t3" secondAttribute="leading" id="3T2-ad-Qdv"/>
+                            <constraint firstItem="tWc-Dq-wcI" firstAttribute="bottom" secondItem="Ze5-6b-2t3" secondAttribute="bottom" id="RPx-PI-7Xg"/>
+                            <constraint firstItem="tWc-Dq-wcI" firstAttribute="top" secondItem="Ze5-6b-2t3" secondAttribute="top" id="SdS-ul-q2q"/>
+                            <constraint firstAttribute="trailing" secondItem="tWc-Dq-wcI" secondAttribute="trailing" id="Swv-Gf-Rwn"/>
+                            <constraint firstAttribute="trailing" secondItem="YRO-k0-Ey4" secondAttribute="trailing" id="TQA-XW-tRk"/>
+                            <constraint firstItem="YRO-k0-Ey4" firstAttribute="bottom" secondItem="Ze5-6b-2t3" secondAttribute="bottom" id="duK-uY-Gun"/>
+                            <constraint firstItem="tWc-Dq-wcI" firstAttribute="leading" secondItem="Ze5-6b-2t3" secondAttribute="leading" id="kV7-tw-vXt"/>
+                            <constraint firstItem="YRO-k0-Ey4" firstAttribute="top" secondItem="Ze5-6b-2t3" secondAttribute="top" id="xPn-NY-SIU"/>
+                        </constraints>
+                    </view>
+                </viewController>
+                <placeholder placeholderIdentifier="IBFirstResponder" id="iYj-Kq-Ea1" userLabel="First Responder" sceneMemberID="firstResponder"/>
+            </objects>
+            <point key="canvasLocation" x="53" y="375"/>
+        </scene>
+    </scenes>
+    <resources>
+        <image name="LaunchImage" width="1024" height="1024"/>
+        <image name="LaunchBackground" width="1" height="1"/>
+    </resources>
+</document>

app/ios/Runner/Base.lproj/Main.storyboard

@@ -0,0 +1,26 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="10117" systemVersion="15F34" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" initialViewController="BYZ-38-t0r">
+    <dependencies>
+        <deployment identifier="iOS"/>
+        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="10085"/>
+    </dependencies>
+    <scenes>
+        <!--Flutter View Controller-->
+        <scene sceneID="tne-QT-ifu">
+            <objects>
+                <viewController id="BYZ-38-t0r" customClass="FlutterViewController" sceneMemberID="viewController">
+                    <layoutGuides>
+                        <viewControllerLayoutGuide type="top" id="y3c-jy-aDJ"/>
+                        <viewControllerLayoutGuide type="bottom" id="wfy-db-euE"/>
+                    </layoutGuides>
+                    <view key="view" contentMode="scaleToFill" id="8bC-Xf-vdC">
+                        <rect key="frame" x="0.0" y="0.0" width="600" height="600"/>
+                        <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
+                        <color key="backgroundColor" white="1" alpha="1" colorSpace="custom" customColorSpace="calibratedWhite"/>
+                    </view>
+                </viewController>
+                <placeholder placeholderIdentifier="IBFirstResponder" id="dkx-z0-nzr" sceneMemberID="firstResponder"/>
+            </objects>
+        </scene>
+    </scenes>
+</document>

app/ios/Runner/Info.plist

@@ -0,0 +1,71 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+	<dict>
+		<key>UIBackgroundModes</key>
+		<array>
+			<string>remote-notification</string>
+		</array>
+		<key>NSCameraUsageDescription</key>
+		<string>The camera is used to scan contacts' QR codes and to take photos for attachments.</string>
+		<key>NSPhotoLibraryUsageDescription</key>
+		<string>The photo library is used to pick photos to send in a conversation.</string>
+		<key>NSFaceIDUsageDescription</key>
+		<string>Face ID unlocks the app instead of your PIN.</string>
+		<key>CFBundleDisplayName</key>
+		<string>Šepot</string>
+		<key>CFBundleDevelopmentRegion</key>
+		<string>$(DEVELOPMENT_LANGUAGE)</string>
+		<key>CFBundleLocalizations</key>
+		<array>
+			<string>en</string>
+			<string>cs</string>
+			<string>de</string>
+			<string>ru</string>
+			<string>it</string>
+		</array>
+		<key>CFBundleExecutable</key>
+		<string>$(EXECUTABLE_NAME)</string>
+		<key>CFBundleIdentifier</key>
+		<string>$(PRODUCT_BUNDLE_IDENTIFIER)</string>
+		<key>CFBundleInfoDictionaryVersion</key>
+		<string>6.0</string>
+		<key>CFBundleName</key>
+		<string>sepot</string>
+		<key>CFBundlePackageType</key>
+		<string>APPL</string>
+		<key>CFBundleShortVersionString</key>
+		<string>$(FLUTTER_BUILD_NAME)</string>
+		<key>CFBundleSignature</key>
+		<string>????</string>
+		<key>CFBundleVersion</key>
+		<string>$(FLUTTER_BUILD_NUMBER)</string>
+		<key>ITSAppUsesNonExemptEncryption</key>
+		<true/>
+		<key>LSRequiresIPhoneOS</key>
+		<true/>
+		<key>UILaunchStoryboardName</key>
+		<string>LaunchScreen</string>
+		<key>UIMainStoryboardFile</key>
+		<string>Main</string>
+		<key>UISupportedInterfaceOrientations</key>
+		<array>
+			<string>UIInterfaceOrientationPortrait</string>
+		</array>
+		<key>UISupportedInterfaceOrientations~ipad</key>
+		<array>
+			<string>UIInterfaceOrientationPortrait</string>
+			<string>UIInterfaceOrientationPortraitUpsideDown</string>
+		</array>
+		<key>UIRequiresFullScreen</key>
+		<true/>
+		<key>CADisableMinimumFrameDurationOnPhone</key>
+		<true/>
+		<key>UIApplicationSupportsIndirectInputEvents</key>
+		<true/>
+		<key>UIStatusBarHidden</key>
+		<false/>
+		<key>NSMicrophoneUsageDescription</key>
+		<string>Šepot needs the microphone to record voice messages.</string>
+	</dict>
+</plist>

app/ios/Runner/PrivacyInfo.xcprivacy

@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+  <key>NSPrivacyTracking</key><false/>
+  <key>NSPrivacyTrackingDomains</key><array/>
+  <key>NSPrivacyCollectedDataTypes</key><array/>
+  <key>NSPrivacyAccessedAPITypes</key>
+  <array>
+    <dict>
+      <key>NSPrivacyAccessedAPIType</key>
+      <string>NSPrivacyAccessedAPICategorySystemBootTime</string>
+      <key>NSPrivacyAccessedAPITypeReasons</key>
+      <array><string>35F9.1</string></array>
+    </dict>
+  </array>
+</dict>
+</plist>

app/ios/Runner/Runner-Bridging-Header.h

@@ -0,0 +1 @@
+#import "GeneratedPluginRegistrant.h"

app/ios/Runner/Runner.entitlements

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+    <key>aps-environment</key>
+    <string>production</string>
+</dict>
+</plist>

app/ios/Runner/SceneDelegate.swift

@@ -0,0 +1,6 @@
+import Flutter
+import UIKit
+
+class SceneDelegate: FlutterSceneDelegate {
+
+}

app/ios/Runner/cs.lproj/InfoPlist.strings

@@ -0,0 +1,5 @@
+/* Šepot — texty oprávnění iOS (čeština) */
+"NSCameraUsageDescription" = "Kamera slouží ke skenování QR kódů kontaktů a focení příloh.";
+"NSPhotoLibraryUsageDescription" = "Galerie slouží k výběru fotek pro odeslání v konverzaci.";
+"NSFaceIDUsageDescription" = "Face ID odemyká aplikaci místo PINu.";
+"NSMicrophoneUsageDescription" = "Šepot potřebuje mikrofon pro nahrávání hlasových zpráv.";

app/ios/Runner/de.lproj/InfoPlist.strings

@@ -0,0 +1,5 @@
+/* Šepot — iOS-Berechtigungstexte (Deutsch) */
+"NSCameraUsageDescription" = "Die Kamera dient zum Scannen der QR-Codes deiner Kontakte und zum Aufnehmen von Fotos für Anhänge.";
+"NSPhotoLibraryUsageDescription" = "Die Fotomediathek dient zum Auswählen von Fotos, die du in einer Unterhaltung sendest.";
+"NSFaceIDUsageDescription" = "Face ID entsperrt die App anstelle der PIN.";
+"NSMicrophoneUsageDescription" = "Šepot benötigt das Mikrofon zum Aufnehmen von Sprachnachrichten.";

app/ios/Runner/en.lproj/InfoPlist.strings

@@ -0,0 +1,5 @@
+/* Šepot — iOS permission strings (English) */
+"NSCameraUsageDescription" = "The camera is used to scan contacts' QR codes and to take photos for attachments.";
+"NSPhotoLibraryUsageDescription" = "The photo library is used to pick photos to send in a conversation.";
+"NSFaceIDUsageDescription" = "Face ID unlocks the app instead of your PIN.";
+"NSMicrophoneUsageDescription" = "Šepot needs the microphone to record voice messages.";

app/ios/Runner/it.lproj/InfoPlist.strings

@@ -0,0 +1,5 @@
+/* Šepot — testi delle autorizzazioni iOS (italiano) */
+"NSCameraUsageDescription" = "La fotocamera serve a scansionare i codici QR dei contatti e a scattare foto per gli allegati.";
+"NSPhotoLibraryUsageDescription" = "La libreria foto serve a scegliere le foto da inviare in una conversazione.";
+"NSFaceIDUsageDescription" = "Face ID sblocca l'app al posto del PIN.";
+"NSMicrophoneUsageDescription" = "Šepot ha bisogno del microfono per registrare i messaggi vocali.";

app/ios/Runner/ru.lproj/InfoPlist.strings

@@ -0,0 +1,5 @@
+/* Šepot — тексты разрешений iOS (русский) */
+"NSCameraUsageDescription" = "Камера используется для сканирования QR-кодов контактов и съёмки фотографий для вложений.";
+"NSPhotoLibraryUsageDescription" = "Галерея используется для выбора фотографий, которые вы отправляете в чате.";
+"NSFaceIDUsageDescription" = "Face ID разблокирует приложение вместо PIN-кода.";
+"NSMicrophoneUsageDescription" = "Для записи голосовых сообщений приложению Šepot нужен доступ к микрофону.";