1202: Android invalid certificate

frontend/assets/ca/lets-encrypt-r3.pem

@@ -0,0 +1,30 @@
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----

frontend/ios/Podfile.lock

@@ -2,6 +2,8 @@ PODS:
   - connectivity_plus (0.0.1):
     - Flutter
     - ReachabilitySwift
+  - device_info_plus (0.0.1):
+    - Flutter
   - fk_user_agent (2.0.0):
     - Flutter
   - Flutter (1.0.0)
@@ -99,6 +101,7 @@ PODS:
 
 DEPENDENCIES:
   - connectivity_plus (from `.symlinks/plugins/connectivity_plus/ios`)
+  - device_info_plus (from `.symlinks/plugins/device_info_plus/ios`)
   - fk_user_agent (from `.symlinks/plugins/fk_user_agent/ios`)
   - Flutter (from `Flutter`)
   - flutter_secure_storage (from `.symlinks/plugins/flutter_secure_storage/ios`)
@@ -139,6 +142,8 @@ SPEC REPOS:
 EXTERNAL SOURCES:
   connectivity_plus:
     :path: ".symlinks/plugins/connectivity_plus/ios"
+  device_info_plus:
+    :path: ".symlinks/plugins/device_info_plus/ios"
   fk_user_agent:
     :path: ".symlinks/plugins/fk_user_agent/ios"
   Flutter:
@@ -166,6 +171,7 @@ EXTERNAL SOURCES:
 
 SPEC CHECKSUMS:
   connectivity_plus: 413a8857dd5d9f1c399a39130850d02fe0feaf7e
+  device_info_plus: c6fb39579d0f423935b0c9ce7ee2f44b71b9fce6
   fk_user_agent: 1f47ec39291e8372b1d692b50084b0d54103c545
   Flutter: f04841e97a9d0b0a8025694d0796dd46242b2854
   flutter_secure_storage: 23fc622d89d073675f2eaa109381aefbcf5a49be

frontend/lib/main.dart

@@ -1,18 +1,23 @@
 import 'dart:io';
-
 import 'package:ehrenamtskarte/app.dart';
 import 'package:ehrenamtskarte/build_config/build_config.dart';
 import 'package:ehrenamtskarte/configuration/definitions.dart';
 import 'package:ehrenamtskarte/l10n/translations.g.dart';
 import 'package:ehrenamtskarte/sentry.dart';
 import 'package:ehrenamtskarte/settings_provider.dart';
+import 'package:ehrenamtskarte/util/android_certificate.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
 import 'package:slang/builder/model/enums.dart';
 
 Future<void> main() async {
   WidgetsFlutterBinding.ensureInitialized();
 
+  // support android version < 7.1.1 by adding a valid certificate - https://stackoverflow.com/questions/69511057
+  if (Platform.isAndroid && await certificateIsRequired()) {
+    loadCertificate();
+  }
+
   // Only use device locale if set as available in build config, otherwise fallback to de
   final locale = Platform.localeName.split('_')[0];
   if (buildConfig.appLocales.contains(locale)) {

frontend/lib/util/android_certificate.dart

@@ -0,0 +1,14 @@
+import 'dart:io';
+import 'package:flutter/services.dart';
+import 'package:device_info_plus/device_info_plus.dart';
+
+Future<void> loadCertificate() async {
+  ByteData? data = await PlatformAssetBundle().load('assets/ca/lets-encrypt-r3.pem');
+  SecurityContext.defaultContext.setTrustedCertificatesBytes(data.buffer.asUint8List());
+}
+
+Future<bool> certificateIsRequired() async {
+  DeviceInfoPlugin deviceInfo = DeviceInfoPlugin();
+  AndroidDeviceInfo androidInfo = await deviceInfo.androidInfo;
+  return androidInfo.version.sdkInt < 25;
+}

frontend/pubspec.lock

@@ -249,6 +249,22 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "0.7.8"
+  device_info_plus:
+    dependency: "direct main"
+    description:
+      name: device_info_plus
+      sha256: "7035152271ff67b072a211152846e9f1259cf1be41e34cd3e0b5463d2d6b8419"
+      url: "https://pub.dev"
+    source: hosted
+    version: "9.1.0"
+  device_info_plus_platform_interface:
+    dependency: transitive
+    description:
+      name: device_info_plus_platform_interface
+      sha256: d3b01d5868b50ae571cd1dc6e502fc94d956b665756180f7b16ead09e836fd64
+      url: "https://pub.dev"
+    source: hosted
+    version: "7.0.0"
   df_build_config:
     dependency: "direct dev"
     description:
@@ -1468,6 +1484,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "4.1.4"
+  win32_registry:
+    dependency: transitive
+    description:
+      name: win32_registry
+      sha256: "1c52f994bdccb77103a6231ad4ea331a244dbcef5d1f37d8462f713143b0bfae"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.1.0"
   xdg_directories:
     dependency: transitive
     description:

frontend/pubspec.yaml

@@ -24,6 +24,7 @@ environment:
 dependencies:
   flutter:
     sdk: flutter
+  device_info_plus: "^9.1.0"
   flutter_localizations:
     sdk: flutter
   intl: ^0.18.0
@@ -110,6 +111,7 @@ flutter:
     - assets/nuernberg/background.png
     - assets/nuernberg/intro_slides/
     - assets/nuernberg/l10n/
+    - assets/ca/
 
   # An image asset can refer to one or more resolution-specific 'variants', see
   # https://flutter.dev/assets-and-images/#resolution-aware.