fast_rsa package integration

loc_chain_app/ios/Flutter/Debug.xcconfig

@@ -1 +1,2 @@
+#include? "Pods/Target Support Files/Pods-Runner/Pods-Runner.debug.xcconfig"
 #include "Generated.xcconfig"

loc_chain_app/ios/Flutter/Release.xcconfig

@@ -1 +1,2 @@
+#include? "Pods/Target Support Files/Pods-Runner/Pods-Runner.release.xcconfig"
 #include "Generated.xcconfig"

loc_chain_app/ios/Podfile

@@ -0,0 +1,41 @@
+# Uncomment this line to define a global platform for your project
+# platform :ios, '9.0'
+
+# CocoaPods analytics sends network stats synchronously affecting flutter build latency.
+ENV['COCOAPODS_DISABLE_STATS'] = 'true'
+
+project 'Runner', {
+  'Debug' => :debug,
+  'Profile' => :release,
+  'Release' => :release,
+}
+
+def flutter_root
+  generated_xcode_build_settings_path = File.expand_path(File.join('..', 'Flutter', 'Generated.xcconfig'), __FILE__)
+  unless File.exist?(generated_xcode_build_settings_path)
+    raise "#{generated_xcode_build_settings_path} must exist. If you're running pod install manually, make sure flutter pub get is executed first"
+  end
+
+  File.foreach(generated_xcode_build_settings_path) do |line|
+    matches = line.match(/FLUTTER_ROOT\=(.*)/)
+    return matches[1].strip if matches
+  end
+  raise "FLUTTER_ROOT not found in #{generated_xcode_build_settings_path}. Try deleting Generated.xcconfig, then run flutter pub get"
+end
+
+require File.expand_path(File.join('packages', 'flutter_tools', 'bin', 'podhelper'), flutter_root)
+
+flutter_ios_podfile_setup
+
+target 'Runner' do
+  use_frameworks!
+  use_modular_headers!
+
+  flutter_install_all_ios_pods File.dirname(File.realpath(__FILE__))
+end
+
+post_install do |installer|
+  installer.pods_project.targets.each do |target|
+    flutter_additional_ios_build_settings(target)
+  end
+end

loc_chain_app/ios/Podfile.lock

@@ -0,0 +1,28 @@
+PODS:
+  - fast_rsa (0.6.0):
+    - Flutter
+  - Flutter (1.0.0)
+  - path_provider (0.0.1):
+    - Flutter
+
+DEPENDENCIES:
+  - fast_rsa (from `.symlinks/plugins/fast_rsa/ios`)
+  - Flutter (from `Flutter`)
+  - path_provider (from `.symlinks/plugins/path_provider/ios`)
+
+EXTERNAL SOURCES:
+  fast_rsa:
+    :path: ".symlinks/plugins/fast_rsa/ios"
+  Flutter:
+    :path: Flutter
+  path_provider:
+    :path: ".symlinks/plugins/path_provider/ios"
+
+SPEC CHECKSUMS:
+  fast_rsa: 348fa9c4afd02ab8659480e679f647f454acc80e
+  Flutter: 434fef37c0980e73bb6479ef766c45957d4b510c
+  path_provider: abfe2b5c733d04e238b0d8691db0cfd63a27a93c
+
+PODFILE CHECKSUM: aafe91acc616949ddb318b77800a7f51bffa2a4c
+
+COCOAPODS: 1.10.1

loc_chain_app/ios/Runner.xcodeproj/project.pbxproj

@@ -13,6 +13,7 @@
 		97C146FC1CF9000F007C117D /* Main.storyboard in Resources */ = {isa = PBXBuildFile; fileRef = 97C146FA1CF9000F007C117D /* Main.storyboard */; };
 		97C146FE1CF9000F007C117D /* Assets.xcassets in Resources */ = {isa = PBXBuildFile; fileRef = 97C146FD1CF9000F007C117D /* Assets.xcassets */; };
 		97C147011CF9000F007C117D /* LaunchScreen.storyboard in Resources */ = {isa = PBXBuildFile; fileRef = 97C146FF1CF9000F007C117D /* LaunchScreen.storyboard */; };
+		E1C832068AB674471A23DFC7 /* Pods_Runner.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 2C427E90E3BB69D6B911A804 /* Pods_Runner.framework */; };
 /* End PBXBuildFile section */
 
 /* Begin PBXCopyFilesBuildPhase section */
@@ -31,10 +32,14 @@
 /* Begin PBXFileReference section */
 		1498D2321E8E86230040F4C2 /* GeneratedPluginRegistrant.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = GeneratedPluginRegistrant.h; sourceTree = "<group>"; };
 		1498D2331E8E89220040F4C2 /* GeneratedPluginRegistrant.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = GeneratedPluginRegistrant.m; sourceTree = "<group>"; };
+		2C427E90E3BB69D6B911A804 /* Pods_Runner.framework */ = {isa = PBXFileReference; explicitFileType = wrapper.framework; includeInIndex = 0; path = Pods_Runner.framework; sourceTree = BUILT_PRODUCTS_DIR; };
+		31DACBD0B66191129EC4BA7F /* Pods-Runner.profile.xcconfig */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = text.xcconfig; name = "Pods-Runner.profile.xcconfig"; path = "Target Support Files/Pods-Runner/Pods-Runner.profile.xcconfig"; sourceTree = "<group>"; };
 		3B3967151E833CAA004F5970 /* AppFrameworkInfo.plist */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text.plist.xml; name = AppFrameworkInfo.plist; path = Flutter/AppFrameworkInfo.plist; sourceTree = "<group>"; };
+		65E120A3551B34655C1793C5 /* Pods-Runner.release.xcconfig */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = text.xcconfig; name = "Pods-Runner.release.xcconfig"; path = "Target Support Files/Pods-Runner/Pods-Runner.release.xcconfig"; sourceTree = "<group>"; };
 		74858FAD1ED2DC5600515810 /* Runner-Bridging-Header.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = "Runner-Bridging-Header.h"; sourceTree = "<group>"; };
 		74858FAE1ED2DC5600515810 /* AppDelegate.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = AppDelegate.swift; sourceTree = "<group>"; };
 		7AFA3C8E1D35360C0083082E /* Release.xcconfig */ = {isa = PBXFileReference; lastKnownFileType = text.xcconfig; name = Release.xcconfig; path = Flutter/Release.xcconfig; sourceTree = "<group>"; };
+		8F26C49D78C6505C4C9F3FDA /* Pods-Runner.debug.xcconfig */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = text.xcconfig; name = "Pods-Runner.debug.xcconfig"; path = "Target Support Files/Pods-Runner/Pods-Runner.debug.xcconfig"; sourceTree = "<group>"; };
 		9740EEB21CF90195004384FC /* Debug.xcconfig */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text.xcconfig; name = Debug.xcconfig; path = Flutter/Debug.xcconfig; sourceTree = "<group>"; };
 		9740EEB31CF90195004384FC /* Generated.xcconfig */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text.xcconfig; name = Generated.xcconfig; path = Flutter/Generated.xcconfig; sourceTree = "<group>"; };
 		97C146EE1CF9000F007C117D /* Runner.app */ = {isa = PBXFileReference; explicitFileType = wrapper.application; includeInIndex = 0; path = Runner.app; sourceTree = BUILT_PRODUCTS_DIR; };
@@ -49,12 +54,24 @@
 			isa = PBXFrameworksBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
+				E1C832068AB674471A23DFC7 /* Pods_Runner.framework in Frameworks */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};
 /* End PBXFrameworksBuildPhase section */
 
 /* Begin PBXGroup section */
+		69EB72FA53A9891457653AAB /* Pods */ = {
+			isa = PBXGroup;
+			children = (
+				8F26C49D78C6505C4C9F3FDA /* Pods-Runner.debug.xcconfig */,
+				65E120A3551B34655C1793C5 /* Pods-Runner.release.xcconfig */,
+				31DACBD0B66191129EC4BA7F /* Pods-Runner.profile.xcconfig */,
+			);
+			name = Pods;
+			path = Pods;
+			sourceTree = "<group>";
+		};
 		9740EEB11CF90186004384FC /* Flutter */ = {
 			isa = PBXGroup;
 			children = (
@@ -72,6 +89,8 @@
 				9740EEB11CF90186004384FC /* Flutter */,
 				97C146F01CF9000F007C117D /* Runner */,
 				97C146EF1CF9000F007C117D /* Products */,
+				69EB72FA53A9891457653AAB /* Pods */,
+				FCDA85F51884D241BBF6E2C7 /* Frameworks */,
 			);
 			sourceTree = "<group>";
 		};
@@ -98,6 +117,14 @@
 			path = Runner;
 			sourceTree = "<group>";
 		};
+		FCDA85F51884D241BBF6E2C7 /* Frameworks */ = {
+			isa = PBXGroup;
+			children = (
+				2C427E90E3BB69D6B911A804 /* Pods_Runner.framework */,
+			);
+			name = Frameworks;
+			sourceTree = "<group>";
+		};
 /* End PBXGroup section */
 
 /* Begin PBXNativeTarget section */
@@ -105,12 +132,14 @@
 			isa = PBXNativeTarget;
 			buildConfigurationList = 97C147051CF9000F007C117D /* Build configuration list for PBXNativeTarget "Runner" */;
 			buildPhases = (
+				26B33161B5A1B29F50036AAB /* [CP] Check Pods Manifest.lock */,
 				9740EEB61CF901F6004384FC /* Run Script */,
 				97C146EA1CF9000F007C117D /* Sources */,
 				97C146EB1CF9000F007C117D /* Frameworks */,
 				97C146EC1CF9000F007C117D /* Resources */,
 				9705A1C41CF9048500538489 /* Embed Frameworks */,
 				3B06AD1E1E4923F5004D2608 /* Thin Binary */,
+				10B41FA962D6462BEAB7F8B2 /* [CP] Embed Pods Frameworks */,
 			);
 			buildRules = (
 			);
@@ -169,6 +198,45 @@
 /* End PBXResourcesBuildPhase section */
 
 /* Begin PBXShellScriptBuildPhase section */
+		10B41FA962D6462BEAB7F8B2 /* [CP] Embed Pods Frameworks */ = {
+			isa = PBXShellScriptBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+			);
+			inputFileListPaths = (
+				"${PODS_ROOT}/Target Support Files/Pods-Runner/Pods-Runner-frameworks-${CONFIGURATION}-input-files.xcfilelist",
+			);
+			name = "[CP] Embed Pods Frameworks";
+			outputFileListPaths = (
+				"${PODS_ROOT}/Target Support Files/Pods-Runner/Pods-Runner-frameworks-${CONFIGURATION}-output-files.xcfilelist",
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+			shellPath = /bin/sh;
+			shellScript = "\"${PODS_ROOT}/Target Support Files/Pods-Runner/Pods-Runner-frameworks.sh\"\n";
+			showEnvVarsInLog = 0;
+		};
+		26B33161B5A1B29F50036AAB /* [CP] Check Pods Manifest.lock */ = {
+			isa = PBXShellScriptBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+			);
+			inputFileListPaths = (
+			);
+			inputPaths = (
+				"${PODS_PODFILE_DIR_PATH}/Podfile.lock",
+				"${PODS_ROOT}/Manifest.lock",
+			);
+			name = "[CP] Check Pods Manifest.lock";
+			outputFileListPaths = (
+			);
+			outputPaths = (
+				"$(DERIVED_FILE_DIR)/Pods-Runner-checkManifestLockResult.txt",
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+			shellPath = /bin/sh;
+			shellScript = "diff \"${PODS_PODFILE_DIR_PATH}/Podfile.lock\" \"${PODS_ROOT}/Manifest.lock\" > /dev/null\nif [ $? != 0 ] ; then\n    # print error to STDERR\n    echo \"error: The sandbox is not in sync with the Podfile.lock. Run 'pod install' or update your CocoaPods installation.\" >&2\n    exit 1\nfi\n# This output is used by Xcode 'outputs' to avoid re-running this script phase.\necho \"SUCCESS\" > \"${SCRIPT_OUTPUT_FILE_0}\"\n";
+			showEnvVarsInLog = 0;
+		};
 		3B06AD1E1E4923F5004D2608 /* Thin Binary */ = {
 			isa = PBXShellScriptBuildPhase;
 			buildActionMask = 2147483647;

loc_chain_app/ios/Runner.xcworkspace/contents.xcworkspacedata

@@ -4,4 +4,7 @@
    <FileRef
       location = "group:Runner.xcodeproj">
    </FileRef>
+   <FileRef
+      location = "group:Pods/Pods.xcodeproj">
+   </FileRef>
 </Workspace>

loc_chain_app/lib/pages/keygen.dart

@@ -1,7 +1,54 @@
 import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
-import 'package:rsa_encrypt/rsa_encrypt.dart' as rsa;
+import 'package:flutter/widgets.dart';
-import 'package:pointycastle/api.dart' as crypto;
+import 'package:fast_rsa/rsa.dart';
+import 'package:fast_rsa/model/bridge.pb.dart';
+import 'package:path_provider/path_provider.dart';
+
+import 'dart:io';
+
+class KeyFileManager {
+  static Future<String> get _localPath async {
+    final directory = await getApplicationDocumentsDirectory();
+    return directory.path;
+  }
+
+  static Future<File> get _pubKeyFile async {
+    final path = await _localPath;
+    return File('$path/rsa.pub');
+  }
+
+  static Future<File> get _privKeyFile async {
+    final path = await _localPath;
+    return File('$path/rsa');
+  }
+
+  static Future<KeyPair> readKeyPair() async {
+    try {
+      String privKey = await _privKeyFile.then(
+        (file) => file.readAsString(),
+      );
+      String pubKey = await _pubKeyFile.then(
+        (file) => file.readAsString(),
+      );
+
+      return KeyPair(
+        privateKey: privKey,
+        publicKey: pubKey,
+      );
+    } catch (e) {
+      print(e);
+      return KeyPair();
+    }
+  }
+
+  static Future<void> writeKeyPair(KeyPair pair) async {
+    final File privKeyFile = await _privKeyFile;
+    final File pubKeyFile = await _pubKeyFile;
+    pubKeyFile.writeAsString(pair.publicKey);
+    privKeyFile.writeAsString(pair.privateKey);
+  }
+}
 
 class KeygenPage extends StatefulWidget {
   KeygenPage({Key key, this.title}) : super(key: key);
@@ -12,76 +59,81 @@ class KeygenPage extends StatefulWidget {
 }
 
 class _KeygenState extends State<KeygenPage> {
-  static crypto.AsymmetricKeyPair _keyPair;
+  KeyPair _keyPair = KeyPair();
 
-  void _regenerateKey() {
+  @override
-    setState(() {
+  void initState() {
-      _keyPair = rsa.getRsaKeyPair(rsa.RsaKeyHelper().getSecureRandom());
+    super.initState();
+    KeyFileManager.readKeyPair().then((keyPair) {
+      if (!keyPair.hasPublicKey()) {
+        initKeyPair();
+      } else {
+        setState(() => _keyPair = keyPair);
+      }
     });
   }
 
-  String _getPublicKey() {
+  Future<void> initKeyPair() async {
-    if (_keyPair == null)
+    var keyPair = await RSA.generate(2048);
-      return 'Press the button below to generate your key pair!';
+    await KeyFileManager.writeKeyPair(keyPair);
-    return '${rsa.RsaKeyHelper().encodePublicKeyToPemPKCS1(_keyPair.publicKey)}';
+    setState(() {
+      _keyPair = keyPair;
+    });
+  }
+
+  void copyPublicKey() {
+    if (_keyPair.hasPublicKey()) {
+      Clipboard.setData(
+        new ClipboardData(
+          text: _keyPair.publicKey,
+        ),
+      ).then((_) {
+        ScaffoldMessenger.of(context).showSnackBar(
+          SnackBar(
+            content: Text("RSA public key copied to keyboard"),
+          ),
+        );
+      });
+    } else {
+      ScaffoldMessenger.of(context).showSnackBar(
+        SnackBar(
+          content: Text("You need to generate an RSA keypair before copying."),
+        ),
+      );
+    }
   }
 
   @override
   Widget build(BuildContext context) {
-    // This method is rerun every time setState is called, for instance as done
-    // by the _incrementCounter method above.
-    //
-    // The Flutter framework has been optimized to make rerunning build methods
-    // fast, so that you can just rebuild anything that needs updating rather
-    // than having to individually change instances of widgets.
     return Scaffold(
       appBar: AppBar(
-        // Here we take the value from the MyHomePage object that was created by
-        // the App.build method, and use it to set our appbar title.
         title: Text('RSA Key Configuration'),
       ),
       body: Center(
-        // Center is a layout widget. It takes a single child and positions it
+        child: LayoutBuilder(
-        // in the middle of the parent.
+          builder: (BuildContext context, BoxConstraints constraints) {
-        child: Column(
+            return ListView(
-          // Column is also a layout widget. It takes a list of children and
-          // arranges them vertically. By default, it sizes itself to fit its
-          // children horizontally, and tries to be as tall as its parent.
-          //
-          // Invoke "debug painting" (press "p" in the console, choose the
-          // "Toggle Debug Paint" action from the Flutter Inspector in Android
-          // Studio, or the "Toggle Debug Paint" command in Visual Studio Code)
-          // to see the wireframe for each widget.
-          //
-          // Column has various properties to control how it sizes itself and
-          // how it positions its children. Here we use mainAxisAlignment to
-          // center the children vertically; the main axis here is the vertical
-          // axis because Columns are vertical (the cross axis would be
-          // horizontal).
-          mainAxisAlignment: MainAxisAlignment.center,
               children: <Widget>[
-            TextButton(
+                Container(
-              onPressed: () => Clipboard.setData(
+                  padding: const EdgeInsets.all(32),
-                new ClipboardData(
+                  child: TextButton(
-                  text: _getPublicKey(),
+                    onPressed: copyPublicKey,
-                ),
-              ).then((_) {
-                ScaffoldMessenger.of(context).showSnackBar(SnackBar(
-                  content: Text("RSA public key copied to keyboard"),
-                ));
-              }),
                     child: Text(
-                _getPublicKey(),
+                      _keyPair.publicKey,
                       style: Theme.of(context).textTheme.bodyText1,
+                      softWrap: true,
                     ),
                     style: Theme.of(context).outlinedButtonTheme.style,
                   ),
+                ),
                 ElevatedButton(
-              onPressed: _regenerateKey,
+                  onPressed: initKeyPair,
                   child: Text('Reset RSA Key'),
                   style: Theme.of(context).elevatedButtonTheme.style,
                 ),
               ],
+            );
+          },
         ),
       ),
     );

loc_chain_app/pubspec.lock

@@ -1,13 +1,6 @@
 # Generated by pub
 # See https://dart.dev/tools/pub/glossary#lockfile
 packages:
-  asn1lib:
-    dependency: transitive
-    description:
-      name: asn1lib
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "0.8.1"
   async:
     dependency: transitive
     description:
@@ -64,6 +57,34 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "1.2.0"
+  fast_rsa:
+    dependency: "direct main"
+    description:
+      name: fast_rsa
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.3.6"
+  ffi:
+    dependency: transitive
+    description:
+      name: ffi
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "0.1.3"
+  file:
+    dependency: transitive
+    description:
+      name: file
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "6.1.0"
+  fixnum:
+    dependency: transitive
+    description:
+      name: fixnum
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "0.10.11"
   flutter:
     dependency: "direct main"
     description: flutter
@@ -74,6 +95,18 @@ packages:
     description: flutter
     source: sdk
     version: "0.0.0"
+  flutter_web_plugins:
+    dependency: transitive
+    description: flutter
+    source: sdk
+    version: "0.0.0"
+  js:
+    dependency: transitive
+    description:
+      name: js
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "0.6.3"
   matcher:
     dependency: transitive
     description:
@@ -95,20 +128,69 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "1.8.0"
-  pointycastle:
+  path_provider:
-    dependency: transitive
-    description:
-      name: pointycastle
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "2.0.1"
-  rsa_encrypt:
     dependency: "direct main"
     description:
-      name: rsa_encrypt
+      name: path_provider
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.0.5"
+    version: "1.6.28"
+  path_provider_linux:
+    dependency: transitive
+    description:
+      name: path_provider_linux
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "0.0.1+2"
+  path_provider_macos:
+    dependency: transitive
+    description:
+      name: path_provider_macos
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "0.0.4+8"
+  path_provider_platform_interface:
+    dependency: transitive
+    description:
+      name: path_provider_platform_interface
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.0.4"
+  path_provider_windows:
+    dependency: transitive
+    description:
+      name: path_provider_windows
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "0.0.4+3"
+  platform:
+    dependency: transitive
+    description:
+      name: platform
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "3.0.0"
+  plugin_platform_interface:
+    dependency: transitive
+    description:
+      name: plugin_platform_interface
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.0.3"
+  process:
+    dependency: transitive
+    description:
+      name: process
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "4.2.1"
+  protobuf:
+    dependency: transitive
+    description:
+      name: protobuf
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.1.3"
   sky_engine:
     dependency: transitive
     description: flutter
@@ -170,5 +252,20 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "2.1.0"
+  win32:
+    dependency: transitive
+    description:
+      name: win32
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.7.4+1"
+  xdg_directories:
+    dependency: transitive
+    description:
+      name: xdg_directories
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "0.1.2"
 sdks:
   dart: ">=2.12.0-0.0 <3.0.0"
+  flutter: ">=1.12.13+hotfix.5"

loc_chain_app/pubspec.yaml

@@ -28,7 +28,8 @@ dependencies:
   # The following adds the Cupertino Icons font to your application.
   # Use with the CupertinoIcons class for iOS style icons.
   cupertino_icons: ^1.0.2
-  rsa_encrypt: ^1.0.5
+  path_provider: ^1.6.28
+  fast_rsa: ^1.1.4
 
 dev_dependencies:
   flutter_test: