[4sem] isaip03 done

2021-05-08 12:18:10 +07:00 · 2021-05-08 12:18:10 +07:00 · 99bde2d946
commit 99bde2d946
parent 451bc1bfdb
39 changed files with 2476 additions and 0 deletions
--- a/4sem/isaip/03/AESCryptor/.idea/.gitignore
+++ b/4sem/isaip/03/AESCryptor/.idea/.gitignore
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+      <root url="file://$PROJECT_DIR$/../../../../fluttersdk/flutter/.pub-cache/git/flutter-desktop-embedding-f2d8aa3820fb87316516670bf4d51a74de8ac0dd/plugins/window_size/lib" />
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--- a/4sem/isaip/03/AESCryptor/.idea/libraries/Dart_SDK.xml
+++ b/4sem/isaip/03/AESCryptor/.idea/libraries/Dart_SDK.xml
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+  <library name="Dart SDK">
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--- a/4sem/isaip/03/AESCryptor/.idea/libraries/Flutter_Plugins.xml
+++ b/4sem/isaip/03/AESCryptor/.idea/libraries/Flutter_Plugins.xml
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+    <JAVADOC />
+    <SOURCES />
+  </library>
+</component>
--- a/4sem/isaip/03/AESCryptor/.idea/misc.xml
+++ b/4sem/isaip/03/AESCryptor/.idea/misc.xml
@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="FrameworkDetectionExcludesConfiguration">
+    <type id="android" />
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+  <component name="ProjectRootManager">
+    <output url="file://$PROJECT_DIR$/out" />
+  </component>
+</project>
--- a/4sem/isaip/03/AESCryptor/.idea/modules.xml
+++ b/4sem/isaip/03/AESCryptor/.idea/modules.xml
@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectModuleManager">
+    <modules>
+      <module fileurl="file://$PROJECT_DIR$/aes_cryptor/aes_cryptor.iml" filepath="$PROJECT_DIR$/aes_cryptor/aes_cryptor.iml" />
+    </modules>
+  </component>
+</project>
--- a/4sem/isaip/03/AESCryptor/.idea/runConfigurations.xml
+++ b/4sem/isaip/03/AESCryptor/.idea/runConfigurations.xml
@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="RunConfigurationProducerService">
+    <option name="ignoredProducers">
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--- a/4sem/isaip/03/AESCryptor/aes_cryptor/.gitignore
+++ b/4sem/isaip/03/AESCryptor/aes_cryptor/.gitignore
@ -0,0 +1,47 @@
+# Miscellaneous
+*.class
+*.log
+*.pyc
+*.swp
+.DS_Store
+.atom/
+.buildlog/
+.history
+.svn/
+
+# IntelliJ related
+*.iml
+*.ipr
+*.iws
+.idea/
+
+# The .vscode folder contains launch configuration and tasks you configure in
+# VS Code which you may wish to be included in version control, so this line
+# is commented out by default.
+#.vscode/
+
+# Flutter/Dart/Pub related
+**/doc/api/
+**/ios/Flutter/.last_build_id
+.dart_tool/
+.flutter-plugins
+.flutter-plugins-dependencies
+.packages
+.pub-cache/
+.pub/
+/build/
+
+# Web related
+lib/generated_plugin_registrant.dart
+
+# Symbolication related
+app.*.symbols
+
+# Obfuscation related
+app.*.map.json
+
+# Android Studio will place build artifacts here
+/android/app/debug
+/android/app/profile
+/android/app/release
+/build
--- a/4sem/isaip/03/AESCryptor/aes_cryptor/.metadata
+++ b/4sem/isaip/03/AESCryptor/aes_cryptor/.metadata
@ -0,0 +1,10 @@
+# This file tracks properties of this Flutter project.
+# Used by Flutter tool to assess capabilities and perform upgrades etc.
+#
+# This file should be version controlled and should not be manually edited.
+
+version:
+  revision: c5a4b4029c0798f37c4a39b479d7cb75daa7b05c
+  channel: stable
+
+project_type: app
--- a/4sem/isaip/03/AESCryptor/aes_cryptor/README.md
+++ b/4sem/isaip/03/AESCryptor/aes_cryptor/README.md
@ -0,0 +1,16 @@
+# aes_cryptor
+
+AES Encryptor/Decryptor
+
+## Getting Started
+
+This project is a starting point for a Flutter application.
+
+A few resources to get you started if this is your first Flutter project:
+
+- [Lab: Write your first Flutter app](https://flutter.dev/docs/get-started/codelab)
+- [Cookbook: Useful Flutter samples](https://flutter.dev/docs/cookbook)
+
+For help getting started with Flutter, view our
+[online documentation](https://flutter.dev/docs), which offers tutorials,
+samples, guidance on mobile development, and a full API reference.
--- a/4sem/isaip/03/AESCryptor/aes_cryptor/lib/aes/aes_crypt.dart
+++ b/4sem/isaip/03/AESCryptor/aes_cryptor/lib/aes/aes_crypt.dart
@ -0,0 +1,8 @@
+library aes_crypt;
+
+import "dart:math";
+import "dart:typed_data";
+
+part "src/aes.dart";
+part "src/aes_facade.dart";
+part "src/utils.dart";
--- a/4sem/isaip/03/AESCryptor/aes_cryptor/lib/aes/src/aes.dart
+++ b/4sem/isaip/03/AESCryptor/aes_cryptor/lib/aes/src/aes.dart
@ -0,0 +1,466 @@
+part of aes_crypt;
+
+// This is AES 256 CBC port from PHP phpAES library to Dart lang
+// https://github.com/phillipsdata/phpaes
+
+class _AES {
+  // The S-Box substitution table.
+  static final Uint8List _sBox = Uint8List.fromList([
+    0x63, 0x7c, 0x77, 0x7b, 0xf2, 0x6b, 0x6f, 0xc5,
+    0x30, 0x01, 0x67, 0x2b, 0xfe, 0xd7, 0xab, 0x76,
+    0xca, 0x82, 0xc9, 0x7d, 0xfa, 0x59, 0x47, 0xf0,
+    0xad, 0xd4, 0xa2, 0xaf, 0x9c, 0xa4, 0x72, 0xc0,
+    0xb7, 0xfd, 0x93, 0x26, 0x36, 0x3f, 0xf7, 0xcc,
+    0x34, 0xa5, 0xe5, 0xf1, 0x71, 0xd8, 0x31, 0x15,
+    0x04, 0xc7, 0x23, 0xc3, 0x18, 0x96, 0x05, 0x9a,
+    0x07, 0x12, 0x80, 0xe2, 0xeb, 0x27, 0xb2, 0x75,
+    0x09, 0x83, 0x2c, 0x1a, 0x1b, 0x6e, 0x5a, 0xa0,
+    0x52, 0x3b, 0xd6, 0xb3, 0x29, 0xe3, 0x2f, 0x84,
+    0x53, 0xd1, 0x00, 0xed, 0x20, 0xfc, 0xb1, 0x5b,
+    0x6a, 0xcb, 0xbe, 0x39, 0x4a, 0x4c, 0x58, 0xcf,
+    0xd0, 0xef, 0xaa, 0xfb, 0x43, 0x4d, 0x33, 0x85,
+    0x45, 0xf9, 0x02, 0x7f, 0x50, 0x3c, 0x9f, 0xa8,
+    0x51, 0xa3, 0x40, 0x8f, 0x92, 0x9d, 0x38, 0xf5,
+    0xbc, 0xb6, 0xda, 0x21, 0x10, 0xff, 0xf3, 0xd2,
+    0xcd, 0x0c, 0x13, 0xec, 0x5f, 0x97, 0x44, 0x17,
+    0xc4, 0xa7, 0x7e, 0x3d, 0x64, 0x5d, 0x19, 0x73,
+    0x60, 0x81, 0x4f, 0xdc, 0x22, 0x2a, 0x90, 0x88,
+    0x46, 0xee, 0xb8, 0x14, 0xde, 0x5e, 0x0b, 0xdb,
+    0xe0, 0x32, 0x3a, 0x0a, 0x49, 0x06, 0x24, 0x5c,
+    0xc2, 0xd3, 0xac, 0x62, 0x91, 0x95, 0xe4, 0x79,
+    0xe7, 0xc8, 0x37, 0x6d, 0x8d, 0xd5, 0x4e, 0xa9,
+    0x6c, 0x56, 0xf4, 0xea, 0x65, 0x7a, 0xae, 0x08,
+    0xba, 0x78, 0x25, 0x2e, 0x1c, 0xa6, 0xb4, 0xc6,
+    0xe8, 0xdd, 0x74, 0x1f, 0x4b, 0xbd, 0x8b, 0x8a,
+    0x70, 0x3e, 0xb5, 0x66, 0x48, 0x03, 0xf6, 0x0e,
+    0x61, 0x35, 0x57, 0xb9, 0x86, 0xc1, 0x1d, 0x9e,
+    0xe1, 0xf8, 0x98, 0x11, 0x69, 0xd9, 0x8e, 0x94,
+    0x9b, 0x1e, 0x87, 0xe9, 0xce, 0x55, 0x28, 0xdf,
+    0x8c, 0xa1, 0x89, 0x0d, 0xbf, 0xe6, 0x42, 0x68,
+    0x41, 0x99, 0x2d, 0x0f, 0xb0, 0x54, 0xbb, 0x16
+  ]);
+
+  // The inverse S-Box substitution table.
+  static final Uint8List _invSBox = Uint8List.fromList([
+    0x52, 0x09, 0x6a, 0xd5, 0x30, 0x36, 0xa5, 0x38,
+    0xbf, 0x40, 0xa3, 0x9e, 0x81, 0xf3, 0xd7, 0xfb,
+    0x7c, 0xe3, 0x39, 0x82, 0x9b, 0x2f, 0xff, 0x87,
+    0x34, 0x8e, 0x43, 0x44, 0xc4, 0xde, 0xe9, 0xcb,
+    0x54, 0x7b, 0x94, 0x32, 0xa6, 0xc2, 0x23, 0x3d,
+    0xee, 0x4c, 0x95, 0x0b, 0x42, 0xfa, 0xc3, 0x4e,
+    0x08, 0x2e, 0xa1, 0x66, 0x28, 0xd9, 0x24, 0xb2,
+    0x76, 0x5b, 0xa2, 0x49, 0x6d, 0x8b, 0xd1, 0x25,
+    0x72, 0xf8, 0xf6, 0x64, 0x86, 0x68, 0x98, 0x16,
+    0xd4, 0xa4, 0x5c, 0xcc, 0x5d, 0x65, 0xb6, 0x92,
+    0x6c, 0x70, 0x48, 0x50, 0xfd, 0xed, 0xb9, 0xda,
+    0x5e, 0x15, 0x46, 0x57, 0xa7, 0x8d, 0x9d, 0x84,
+    0x90, 0xd8, 0xab, 0x00, 0x8c, 0xbc, 0xd3, 0x0a,
+    0xf7, 0xe4, 0x58, 0x05, 0xb8, 0xb3, 0x45, 0x06,
+    0xd0, 0x2c, 0x1e, 0x8f, 0xca, 0x3f, 0x0f, 0x02,
+    0xc1, 0xaf, 0xbd, 0x03, 0x01, 0x13, 0x8a, 0x6b,
+    0x3a, 0x91, 0x11, 0x41, 0x4f, 0x67, 0xdc, 0xea,
+    0x97, 0xf2, 0xcf, 0xce, 0xf0, 0xb4, 0xe6, 0x73,
+    0x96, 0xac, 0x74, 0x22, 0xe7, 0xad, 0x35, 0x85,
+    0xe2, 0xf9, 0x37, 0xe8, 0x1c, 0x75, 0xdf, 0x6e,
+    0x47, 0xf1, 0x1a, 0x71, 0x1d, 0x29, 0xc5, 0x89,
+    0x6f, 0xb7, 0x62, 0x0e, 0xaa, 0x18, 0xbe, 0x1b,
+    0xfc, 0x56, 0x3e, 0x4b, 0xc6, 0xd2, 0x79, 0x20,
+    0x9a, 0xdb, 0xc0, 0xfe, 0x78, 0xcd, 0x5a, 0xf4,
+    0x1f, 0xdd, 0xa8, 0x33, 0x88, 0x07, 0xc7, 0x31,
+    0xb1, 0x12, 0x10, 0x59, 0x27, 0x80, 0xec, 0x5f,
+    0x60, 0x51, 0x7f, 0xa9, 0x19, 0xb5, 0x4a, 0x0d,
+    0x2d, 0xe5, 0x7a, 0x9f, 0x93, 0xc9, 0x9c, 0xef,
+    0xa0, 0xe0, 0x3b, 0x4d, 0xae, 0x2a, 0xf5, 0xb0,
+    0xc8, 0xeb, 0xbb, 0x3c, 0x83, 0x53, 0x99, 0x61,
+    0x17, 0x2b, 0x04, 0x7e, 0xba, 0x77, 0xd6, 0x26,
+    0xe1, 0x69, 0x14, 0x63, 0x55, 0x21, 0x0c, 0x7d
+  ]);
+
+  // Log table based on 0xe5
+  static final Uint8List _ltable = Uint8List.fromList([
+    0x00, 0xff, 0xc8, 0x08, 0x91, 0x10, 0xd0, 0x36,
+    0x5a, 0x3e, 0xd8, 0x43, 0x99, 0x77, 0xfe, 0x18,
+    0x23, 0x20, 0x07, 0x70, 0xa1, 0x6c, 0x0c, 0x7f,
+    0x62, 0x8b, 0x40, 0x46, 0xc7, 0x4b, 0xe0, 0x0e,
+    0xeb, 0x16, 0xe8, 0xad, 0xcf, 0xcd, 0x39, 0x53,
+    0x6a, 0x27, 0x35, 0x93, 0xd4, 0x4e, 0x48, 0xc3,
+    0x2b, 0x79, 0x54, 0x28, 0x09, 0x78, 0x0f, 0x21,
+    0x90, 0x87, 0x14, 0x2a, 0xa9, 0x9c, 0xd6, 0x74,
+    0xb4, 0x7c, 0xde, 0xed, 0xb1, 0x86, 0x76, 0xa4,
+    0x98, 0xe2, 0x96, 0x8f, 0x02, 0x32, 0x1c, 0xc1,
+    0x33, 0xee, 0xef, 0x81, 0xfd, 0x30, 0x5c, 0x13,
+    0x9d, 0x29, 0x17, 0xc4, 0x11, 0x44, 0x8c, 0x80,
+    0xf3, 0x73, 0x42, 0x1e, 0x1d, 0xb5, 0xf0, 0x12,
+    0xd1, 0x5b, 0x41, 0xa2, 0xd7, 0x2c, 0xe9, 0xd5,
+    0x59, 0xcb, 0x50, 0xa8, 0xdc, 0xfc, 0xf2, 0x56,
+    0x72, 0xa6, 0x65, 0x2f, 0x9f, 0x9b, 0x3d, 0xba,
+    0x7d, 0xc2, 0x45, 0x82, 0xa7, 0x57, 0xb6, 0xa3,
+    0x7a, 0x75, 0x4f, 0xae, 0x3f, 0x37, 0x6d, 0x47,
+    0x61, 0xbe, 0xab, 0xd3, 0x5f, 0xb0, 0x58, 0xaf,
+    0xca, 0x5e, 0xfa, 0x85, 0xe4, 0x4d, 0x8a, 0x05,
+    0xfb, 0x60, 0xb7, 0x7b, 0xb8, 0x26, 0x4a, 0x67,
+    0xc6, 0x1a, 0xf8, 0x69, 0x25, 0xb3, 0xdb, 0xbd,
+    0x66, 0xdd, 0xf1, 0xd2, 0xdf, 0x03, 0x8d, 0x34,
+    0xd9, 0x92, 0x0d, 0x63, 0x55, 0xaa, 0x49, 0xec,
+    0xbc, 0x95, 0x3c, 0x84, 0x0b, 0xf5, 0xe6, 0xe7,
+    0xe5, 0xac, 0x7e, 0x6e, 0xb9, 0xf9, 0xda, 0x8e,
+    0x9a, 0xc9, 0x24, 0xe1, 0x0a, 0x15, 0x6b, 0x3a,
+    0xa0, 0x51, 0xf4, 0xea, 0xb2, 0x97, 0x9e, 0x5d,
+    0x22, 0x88, 0x94, 0xce, 0x19, 0x01, 0x71, 0x4c,
+    0xa5, 0xe3, 0xc5, 0x31, 0xbb, 0xcc, 0x1f, 0x2d,
+    0x3b, 0x52, 0x6f, 0xf6, 0x2e, 0x89, 0xf7, 0xc0,
+    0x68, 0x1b, 0x64, 0x04, 0x06, 0xbf, 0x83, 0x38
+  ]);
+
+  // Inverse log table
+  static final Uint8List _atable = Uint8List.fromList([
+    0x01, 0xe5, 0x4c, 0xb5, 0xfb, 0x9f, 0xfc, 0x12,
+    0x03, 0x34, 0xd4, 0xc4, 0x16, 0xba, 0x1f, 0x36,
+    0x05, 0x5c, 0x67, 0x57, 0x3a, 0xd5, 0x21, 0x5a,
+    0x0f, 0xe4, 0xa9, 0xf9, 0x4e, 0x64, 0x63, 0xee,
+    0x11, 0x37, 0xe0, 0x10, 0xd2, 0xac, 0xa5, 0x29,
+    0x33, 0x59, 0x3b, 0x30, 0x6d, 0xef, 0xf4, 0x7b,
+    0x55, 0xeb, 0x4d, 0x50, 0xb7, 0x2a, 0x07, 0x8d,
+    0xff, 0x26, 0xd7, 0xf0, 0xc2, 0x7e, 0x09, 0x8c,
+    0x1a, 0x6a, 0x62, 0x0b, 0x5d, 0x82, 0x1b, 0x8f,
+    0x2e, 0xbe, 0xa6, 0x1d, 0xe7, 0x9d, 0x2d, 0x8a,
+    0x72, 0xd9, 0xf1, 0x27, 0x32, 0xbc, 0x77, 0x85,
+    0x96, 0x70, 0x08, 0x69, 0x56, 0xdf, 0x99, 0x94,
+    0xa1, 0x90, 0x18, 0xbb, 0xfa, 0x7a, 0xb0, 0xa7,
+    0xf8, 0xab, 0x28, 0xd6, 0x15, 0x8e, 0xcb, 0xf2,
+    0x13, 0xe6, 0x78, 0x61, 0x3f, 0x89, 0x46, 0x0d,
+    0x35, 0x31, 0x88, 0xa3, 0x41, 0x80, 0xca, 0x17,
+    0x5f, 0x53, 0x83, 0xfe, 0xc3, 0x9b, 0x45, 0x39,
+    0xe1, 0xf5, 0x9e, 0x19, 0x5e, 0xb6, 0xcf, 0x4b,
+    0x38, 0x04, 0xb9, 0x2b, 0xe2, 0xc1, 0x4a, 0xdd,
+    0x48, 0x0c, 0xd0, 0x7d, 0x3d, 0x58, 0xde, 0x7c,
+    0xd8, 0x14, 0x6b, 0x87, 0x47, 0xe8, 0x79, 0x84,
+    0x73, 0x3c, 0xbd, 0x92, 0xc9, 0x23, 0x8b, 0x97,
+    0x95, 0x44, 0xdc, 0xad, 0x40, 0x65, 0x86, 0xa2,
+    0xa4, 0xcc, 0x7f, 0xec, 0xc0, 0xaf, 0x91, 0xfd,
+    0xf7, 0x4f, 0x81, 0x2f, 0x5b, 0xea, 0xa8, 0x1c,
+    0x02, 0xd1, 0x98, 0x71, 0xed, 0x25, 0xe3, 0x24,
+    0x06, 0x68, 0xb3, 0x93, 0x2c, 0x6f, 0x3e, 0x6c,
+    0x0a, 0xb8, 0xce, 0xae, 0x74, 0xb1, 0x42, 0xb4,
+    0x1e, 0xd3, 0x49, 0xe9, 0x9c, 0xc8, 0xc6, 0xc7,
+    0x22, 0x6e, 0xdb, 0x20, 0xbf, 0x43, 0x51, 0x52,
+    0x66, 0xb2, 0x76, 0x60, 0xda, 0xc5, 0xf3, 0xf6,
+    0xaa, 0xcd, 0x9a, 0xa0, 0x75, 0x54, 0x0e, 0x01
+  ]);
+
+  // The number of 32-bit words comprising the plaintext and columns comprising the state matrix of an AES cipher.
+  static const int _Nb = 4;
+  // The number of 32-bit words comprising the cipher key in this AES cipher.
+  static const int _Nk = 8;
+  // The number of rounds in this AES cipher.
+  static const int _Nr = 16;
+
+  // The key schedule in this AES cipher.
+  Uint32List _w; // _Nb*(_Nr+1) 32-bit words
+
+  final List<Uint8List> _state = List.generate(4, (i) => Uint8List(4), growable:false);
+
+  // The encryption key
+  Uint8List _key;
+  // The initialization vector used in advanced cipher modes
+  Uint8List _iv;
+
+
+  _AES() {
+    _iv = Uint8List(0);
+    _key = Uint8List(0);
+
+    _w = Uint32List(_Nb*(_Nr+1));
+  }
+
+
+  // Sets AES encryption key [key] and the initialization vector [iv].
+  //
+  // ignore: non_constant_identifier_names
+  void SetKeys(Uint8List key, Uint8List iv) {
+    assert(key.length == 32, "Invalid key length for AES. Provided ${key.length * 8} bits, expected 256 bits.");
+    assert(iv.length == 16, "Invalid IV length for AES. The initialization vector must be 128 bits long.");
+
+    _key = Uint8List.fromList(key);
+    _iv = (iv == null || iv.isEmpty)? Uint8List(0) : Uint8List.fromList(iv);
+
+    _keyExpansion(_key); // places expanded key in w
+  }
+
+
+  // Encrypts binary data [data] with AES algorithm.
+  //
+  // ignore: non_constant_identifier_names
+  Uint8List Encrypt(Uint8List data) {
+    assert(_key != null && _key.isNotEmpty, "AES encryption key is null or empty.");
+    assert(data.length % 16 == 0, "Invalid data length for AES: ${data.length} bytes.");
+
+    Uint8List encData = Uint8List(data.length);
+    Uint8List t = Uint8List(16);
+    Uint8List block16 = Uint8List.fromList(_iv);
+
+    for (int i = 0; i < data.length; i += 16) {
+      for (int j = 0; j < 16; ++j) {
+        // For CBC, XOR this block of plaintext with the initialization vector
+        t[j] = ((i+j) < data.length? data[i+j] : 0) ^ block16[j];
+      }
+      block16 = encryptBlock(t);
+      encData.setRange(i, i+16, block16);
+    }
+
+    return encData;
+  }
+
+  // Decrypts binary data [data] encrypted with AES algorithm.
+  //
+  // ignore: non_constant_identifier_names
+  Uint8List Decrypt(Uint8List data) {
+    assert(_key != null && _key.isNotEmpty, "AES encryption key is null or empty.");
+    assert(data.length % 16 == 0, "Invalid data length for AES: ${data.length} bytes.");
+
+    Uint8List decData = Uint8List(data.length); // returned decrypted data;
+    Uint8List t = Uint8List(16); // 16-byte block
+    Uint8List xBlock;
+    Uint8List block16 = Uint8List.fromList(_iv); // 16-byte block to hold the temporary output of the cipher
+
+    for (int i = 0; i < data.length; i += 16) {
+      for (int j = 0; j < 16; ++j) {
+        if ((i+j) < data.length) { t[j] = data[i+j]; }
+        else { t[j] = 0; }
+      }
+      xBlock = decryptBlock(t);
+      // For CBC, XOR the iv(previous cipher) block with this decrypted cipher block
+      for (int j = 0; j < 16; ++j) {
+        xBlock[j] = xBlock[j] ^ block16[j];
+      }
+      block16 = Uint8List.fromList(t);
+      decData.setRange(i, i+16, xBlock);
+    }
+
+    return decData;
+  }
+
+
+  // Encrypts the 16-byte data block.
+  Uint8List encryptBlock(Uint8List data) {
+    Uint8List encBlock = Uint8List(16);
+    int i;
+
+    // place input data into the initial state matrix in column order
+    for (i = 0; i < 4*_Nb; ++i) {
+      _state[i % 4][(i - i%_Nb) ~/ _Nb] = data[i];
+    }
+
+    // add round key
+    _addRoundKey(0);
+
+    for (i = 1; i < _Nr; ++i) {
+      // substitute bytes
+      _subBytes();
+      // shift rows
+      _shiftRows();
+      // mix columns
+      _mixColumns();
+      // add round key
+      _addRoundKey(i);
+    }
+
+    // substitute bytes
+    _subBytes();
+    // shift rows
+    _shiftRows();
+    // add round key
+    _addRoundKey(i);
+
+    // place state matrix _state into encBlock in column order
+    for (i = 0; i < 4*_Nb; ++i) {
+      encBlock[i] = _state[i % 4][(i - i%_Nb) ~/ _Nb];
+    }
+    return encBlock;
+  }
+
+
+  // Decrypts the 16-byte data block.
+  Uint8List decryptBlock(Uint8List data) {
+    Uint8List decBlock = Uint8List(16);
+    int i;
+
+    // place input data into the initial state matrix in column order
+    for (i = 0; i < 4*_Nb; ++i) {
+      _state[i % 4][(i - i%_Nb) ~/ _Nb] = data[i];
+    }
+
+    // add round key
+    _addRoundKey(_Nr);
+
+    for (i = _Nr-1; i > 0; --i) {
+      // inverse shift rows
+      _invShiftRows();
+      // inverse sub bytes
+      _invSubBytes();
+      // add round key
+      _addRoundKey(i);
+      // inverse mix columns
+      _invMixColumns();
+    }
+
+    // inverse shift rows
+    _invShiftRows();
+    // inverse sub bytes
+    _invSubBytes();
+    // add round key
+    _addRoundKey(i);
+
+    // place state matrix s into decBlock in column order
+    for (i = 0; i < 4*_Nb; ++i) {
+      decBlock[i] = _state[i % 4][(i - i%_Nb) ~/ _Nb];
+    }
+    return decBlock;
+  }
+
+
+  // Expands small key to big one
+  void _keyExpansion(Uint8List key) {
+    const rconBase = [ 0x00000000,
+      0x01000000, 0x02000000, 0x04000000, 0x08000000,
+      0x10000000, 0x20000000, 0x40000000, 0x80000000,
+      0x1b000000, 0x36000000, 0x6c000000, 0xd8000000,
+      0xab000000, 0x4d000000, 0x9a000000, 0x2f000000
+    ];
+
+    int temp;
+    int i;
+
+    // the first _Nk words of w are the cipher key z
+    for (i = 0; i < _Nk; ++i) {
+      _w[i] = key.buffer.asByteData().getUint32(i*4);
+    }
+
+    while (i < _Nb*(_Nr+1)) {
+      temp = _w[i-1];
+      if (i % _Nk == 0) {
+        temp = _subWord(_rotWord(temp)) ^ rconBase[i ~/ _Nk];
+      } else if (_Nk > 6 && i%_Nk == 4) {
+        temp = _subWord(temp);
+      }
+      _w[i] = (_w[i-_Nk] ^ temp) & 0xFFFFFFFF;
+      ++i;
+    }
+  }
+
+  // Adds the key schedule for a round to a state matrix.
+  void _addRoundKey(int round) {
+    int temp;
+
+    for (int i = 0; i < 4; ++i) {
+      for (int j = 0; j < _Nb; ++j) {
+        // place the i-th byte of the j-th word from expanded key w into temp
+        temp = (_w[round*_Nb + j] >> (3-i)*8) & 0xFF;
+        _state[i][j] ^= temp;
+      }
+    }
+  }
+
+  // Mixes each column of a state matrix.
+  void _mixColumns() {
+    int s0; int s1; int s2; int s3;
+
+    // There are _Nb columns
+    for (int i = 0; i < _Nb; ++i) {
+      s0 = _state[0][i];
+      s1 = _state[1][i];
+      s2 = _state[2][i];
+      s3 = _state[3][i];
+
+      _state[0][i] = _mult(0x02, s0) ^ _mult(0x03, s1) ^ _mult(0x01, s2) ^ _mult(0x01, s3);
+      _state[1][i] = _mult(0x01, s0) ^ _mult(0x02, s1) ^ _mult(0x03, s2) ^ _mult(0x01, s3);
+      _state[2][i] = _mult(0x01, s0) ^ _mult(0x01, s1) ^ _mult(0x02, s2) ^ _mult(0x03, s3);
+      _state[3][i] = _mult(0x03, s0) ^ _mult(0x01, s1) ^ _mult(0x01, s2) ^ _mult(0x02, s3);
+    }
+  }
+
+  // Unmixes each column of a state matrix.
+  void _invMixColumns() {
+    int s0; int s1; int s2; int s3;
+
+    // There are _Nb columns
+    for (int i = 0; i < _Nb; ++i) {
+      s0 = _state[0][i];
+      s1 = _state[1][i];
+      s2 = _state[2][i];
+      s3 = _state[3][i];
+
+      _state[0][i] = _mult(0x0e, s0) ^ _mult(0x0b, s1) ^ _mult(0x0d, s2) ^ _mult(0x09, s3);
+      _state[1][i] = _mult(0x09, s0) ^ _mult(0x0e, s1) ^ _mult(0x0b, s2) ^ _mult(0x0d, s3);
+      _state[2][i] = _mult(0x0d, s0) ^ _mult(0x09, s1) ^ _mult(0x0e, s2) ^ _mult(0x0b, s3);
+      _state[3][i] = _mult(0x0b, s0) ^ _mult(0x0d, s1) ^ _mult(0x09, s2) ^ _mult(0x0e, s3);
+    }
+  }
+
+  // Applies a cyclic shift to the last 3 rows of a state matrix.
+  void _shiftRows() {
+    var temp = List<int>(_Nb);
+    for (int i = 1; i < 4; ++i) {
+      for (int j = 0; j < _Nb; ++j) {
+        temp[j] = _state[i][(j+i) % _Nb];
+      }
+      for (int j = 0; j < _Nb; ++j) {
+        _state[i][j] = temp[j];
+      }
+    }
+  }
+
+  // Applies an inverse cyclic shift to the last 3 rows of a state matrix.
+  void _invShiftRows() {
+    var temp = List<int>(_Nb);
+    for (int i = 1; i < 4; ++i) {
+      for (int j = 0; j < _Nb; ++j) {
+        temp[(i+j) % _Nb] = _state[i][j];
+      }
+      for (int j = 0; j < _Nb; ++j) {
+        _state[i][j] = temp[j];
+      }
+    }
+  }
+
+  // Applies S-Box substitution to each byte of a state matrix.
+  void _subBytes() {
+    for (int i = 0; i < 4; ++i) {
+      for (int j = 0; j < _Nb; ++j) {
+        _state[i][j] = _sBox[_state[i][j]];
+      }
+    }
+  }
+
+  // Applies inverse S-Box substitution to each byte of a state matrix.
+  void _invSubBytes() {
+    for (int i = 0; i < 4; ++i) {
+      for (int j = 0; j < _Nb; ++j) {
+        _state[i][j] = _invSBox[_state[i][j]];
+      }
+    }
+  }
+
+  // Multiplies two polynomials a(x), b(x) in GF(2^8) modulo the irreducible polynomial m(x) = x^8+x^4+x^3+x+1
+  int _mult(int a, int b) {
+    int sum = _ltable[a] + _ltable[b];
+    sum %= 255;
+    // Get the inverse log
+    sum = _atable[sum];
+    return (a == 0? 0 : (b == 0? 0:sum));
+  }
+
+  // Applies a cyclic permutation to a 4-byte word.
+  int _rotWord(int w) => ((w << 8) & 0xFFFFFFFF) | ((w >> 24) & 0xFF);
+
+  // Applies S-box substitution to each byte of a 4-byte word.
+  int _subWord(int w) {
+    int temp = 0;
+    // loop through 4 bytes of a word
+    for (int i = 0; i < 4; ++i) {
+      temp = (w >> 24) & 0xFF; // put the first 8-bits into temp
+      w = ((w << 8) & 0xFFFFFFFF) | _sBox[temp]; // add the substituted byte back
+    }
+    return w;
+  }
+}
--- a/4sem/isaip/03/AESCryptor/aes_cryptor/lib/aes/src/aes_facade.dart
+++ b/4sem/isaip/03/AESCryptor/aes_cryptor/lib/aes/src/aes_facade.dart
@ -0,0 +1,29 @@
+part of aes_crypt;
+
+
+// Facade class for encryption and decryption methods and algorithms.
+class AESCrypt {
+  final _secureRandom = Random.secure();
+  final _aes = _AES();
+
+  // Creates random encryption key of [length] bytes long.
+  Uint8List createKey([int length = 32]) {
+    return Uint8List.fromList(List<int>.generate(length, (i) => _secureRandom.nextInt(256)));
+  }
+
+  // Creates random initialization vector.
+  Uint8List createIV() => createKey(16);
+
+  // Sets AES encryption key [key] and the initialization vector [iv].
+  void setKeys(Uint8List key, Uint8List iv) => _aes.SetKeys(key, iv);
+
+  // Encrypts binary data [data] with AES algorithm.
+  //
+  // ignore: non_constant_identifier_names
+  Uint8List Encrypt(Uint8List data) => _aes.Encrypt(data);
+
+  // Decrypts binary data [data] encrypted with AES algorithm.
+  //
+  // ignore: non_constant_identifier_names
+  Uint8List Decrypt(Uint8List data) => _aes.Decrypt(data);
+}
--- a/4sem/isaip/03/AESCryptor/aes_cryptor/lib/aes/src/utils.dart
+++ b/4sem/isaip/03/AESCryptor/aes_cryptor/lib/aes/src/utils.dart
@ -0,0 +1,76 @@
+part of aes_crypt;
+
+// ignore: non_constant_identifier_names
+Uint8List StringToBytes(String string) {
+  List<int> _data = [];
+
+  string.codeUnits.forEach((hexB) {
+    _data.addAll([
+      (hexB & 0xff00) >> 8,
+      hexB & 0x00ff
+    ]);
+  });
+
+  return Uint8List.fromList(_data);
+}
+
+// ignore: non_constant_identifier_names
+String BytesToString(Uint8List bytes) {
+  assert(bytes.length % 2 == 0, "This method requires even data input!");
+  String string = "";
+
+  for (int i = 0; i < bytes.length; i += 2) {
+    string += String.fromCharCode((bytes[i] << 8) + bytes[i+1]);
+  }
+
+  return string;
+}
+
+// ignore: non_constant_identifier_names
+Uint8List KeyFromString(String strKey) {
+  var runes = strKey.runes.toList(growable: false);
+  Uint8List base = Uint8List(32);
+  for (int i = 0; i < 32; i++) {
+    base[i] = runes[i % runes.length];
+  }
+  return base;
+}
+
+// ignore: non_constant_identifier_names
+String PadString(String originalStr) {
+  if (originalStr.length % 16 == 0) {
+    return originalStr;
+  }
+
+  var width = originalStr.length + 16 - (originalStr.length % 16);
+  return originalStr.padRight(width, "`");
+}
+
+// ignore: non_constant_identifier_names
+String UnpadString(String originalStr) {
+  while (originalStr.endsWith("`")) {
+    originalStr = originalStr.substring(0, originalStr.length-1);
+  }
+
+  return originalStr;
+}
+
+// ignore: non_constant_identifier_names
+String BytesToHexString(Uint8List list) {
+  StringBuffer str = StringBuffer();
+  list.forEach((item) {
+    str.write(item.toRadixString(16).toUpperCase().padLeft(2, '0'));
+    str.write(" ");
+  });
+  return str.toString();
+}
+
+// ignore: non_constant_identifier_names
+Uint8List HexStringToBytes(String hexString) {
+  hexString = hexString.replaceAll(" ", "");
+  assert(hexString.length % 2 == 0, "This method requires even data input!");
+  var rxp = new RegExp(r".{2}");
+  Iterable<Match> matches = rxp.allMatches(hexString);
+  var bytes = matches.map((m) => int.parse(m.group(0), radix: 16)).toList();
+  return Uint8List.fromList(bytes);
+}
--- a/4sem/isaip/03/AESCryptor/aes_cryptor/lib/main.dart
+++ b/4sem/isaip/03/AESCryptor/aes_cryptor/lib/main.dart
@ -0,0 +1,208 @@
+import 'dart:typed_data';
+
+import 'package:aes_cryptor/aes/aes_crypt.dart';
+import "package:flutter/material.dart";
+import "package:window_size/window_size.dart";
+
+void main() async {
+  WidgetsFlutterBinding.ensureInitialized();
+
+  const currSize = const Size(1280, 720);
+  setWindowMinSize(currSize);
+
+  runApp(App());
+}
+
+class App extends StatelessWidget {
+  @override
+  Widget build(BuildContext context) {
+    return MaterialApp(
+      title: "AES Cryptor",
+      theme: ThemeData.dark(),
+      home: MainPage(),
+    );
+  }
+}
+
+class MainPage extends StatefulWidget {
+  MainPage({Key key}) : super(key: key);
+
+  final cryptor = AESCrypt();
+
+  @override
+  _MainPageState createState() => _MainPageState();
+}
+
+class _MainPageState extends State<MainPage> {
+// ignore: non_constant_identifier_names
+  TextEditingController _iv_controller;
+// ignore: non_constant_identifier_names
+  TextEditingController _key_controller;
+// ignore: non_constant_identifier_names
+  TextEditingController _plain_input_controller;
+// ignore: non_constant_identifier_names
+  TextEditingController _cypher_input_controller;
+
+// ignore: non_constant_identifier_names
+  Uint8List aes_key, iv;
+
+  void _generateInitialVector() {
+    _cypher_input_controller.clear();
+
+    iv = widget.cryptor.createIV();
+    _iv_controller.text = _toString(iv);
+    if (aes_key != null && aes_key.isNotEmpty) {
+      widget.cryptor.setKeys(aes_key, iv);
+    }
+  }
+
+  String _toString(Uint8List data) {
+    return (data != null && data.isNotEmpty) ? BytesToHexString(data) : "";
+  }
+
+  void _showSnack(String text) {
+    ScaffoldMessenger.of(context)
+      ..removeCurrentSnackBar()
+      ..showSnackBar(SnackBar(
+        content: Text(text),
+      ));
+  }
+
+  void _secretKeyChanged(String newData) {
+    _cypher_input_controller.clear();
+
+    if (newData.isEmpty) {
+      aes_key = null;
+      _showSnack("Cleared key");
+      return;
+    }
+
+    aes_key = KeyFromString(newData);
+    if (iv != null && iv.isNotEmpty) {
+      widget.cryptor.setKeys(aes_key, iv);
+    }
+    _showSnack("Hex value of key: ${_toString(aes_key)}");
+  }
+
+  void _plainTextChanged(String newData) {
+    if (iv == null || aes_key == null || iv.isEmpty || aes_key.isEmpty) {
+      _showSnack("Key or IV is empty, or both.");
+      return;
+    }
+
+    var encData = widget.cryptor.Encrypt(StringToBytes(PadString(newData)));
+    _cypher_input_controller.text = BytesToHexString(encData);
+  }
+
+  void _cypherTextChanged(String newData) {
+    if (iv == null || aes_key == null || iv.isEmpty || aes_key.isEmpty) {
+      _showSnack("Key or IV is empty, or both.");
+      return;
+    }
+
+    var encData = HexStringToBytes(newData);
+    var decData = widget.cryptor.Decrypt(encData);
+    var decStr = UnpadString(BytesToString(decData));
+    _plain_input_controller.text = decStr;
+  }
+
+  @override
+  void initState() {
+    super.initState();
+    _iv_controller = TextEditingController();
+    _key_controller = TextEditingController();
+    _plain_input_controller = TextEditingController();
+    _cypher_input_controller = TextEditingController();
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      appBar: AppBar(
+        title: Text("AES Cryptor"),
+      ),
+      body: Container(
+        padding: EdgeInsets.all(16),
+        child: Center(
+          child: Column(
+            mainAxisAlignment: MainAxisAlignment.start,
+            children: <Widget>[
+              TextFormField(
+                controller: _key_controller,
+                onFieldSubmitted: _secretKeyChanged,
+                cursorColor: Theme.of(context).textSelectionTheme.cursorColor,
+                maxLength: 32,
+                decoration: InputDecoration(
+                  icon: Icon(Icons.vpn_key),
+                  labelText: "Secret key",
+                  enabledBorder: UnderlineInputBorder(
+                    borderSide: BorderSide(color: Color(0xFF6200EE)),
+                  ),
+                ),
+              ),
+              SizedBox(height: 32),
+              Row(
+                children: [
+                  Expanded(
+                    child: GestureDetector(
+                      onDoubleTap: _generateInitialVector,
+                      child: TextFormField(
+                        controller: _iv_controller,
+                        enabled: false,
+                        cursorColor: Theme.of(context).textSelectionTheme.cursorColor,
+                        decoration: InputDecoration(
+                          icon: Icon(Icons.shield),
+                          labelText: "Initial Vector",
+                          errorText: "Double click, to regenerate",
+                          border: OutlineInputBorder(),
+                          errorStyle: TextStyle(
+                            color: Theme.of(context).disabledColor, // or any other color
+                          ),
+                        ),
+                      ),
+                    ),
+                  ),
+                ],
+              ),
+              SizedBox(height: 32),
+              Row(
+                mainAxisSize: MainAxisSize.max,
+                children: [
+                  Expanded(
+                    child: TextFormField(
+                      keyboardType: TextInputType.multiline,
+                      maxLines: 13,
+                      controller: _plain_input_controller,
+                      onChanged: _plainTextChanged,
+                      cursorColor: Theme.of(context).textSelectionTheme.cursorColor,
+                      decoration: InputDecoration(
+                        labelText: "Plain text",
+                        floatingLabelBehavior: FloatingLabelBehavior.always,
+                        border: OutlineInputBorder(),
+                      ),
+                    ),
+                  ),
+                  SizedBox(width: 32),
+                  Expanded(
+                    child: TextFormField(
+                      keyboardType: TextInputType.multiline,
+                      maxLines: 13,
+                      controller: _cypher_input_controller,
+                      onChanged: _cypherTextChanged,
+                      cursorColor: Theme.of(context).textSelectionTheme.cursorColor,
+                      decoration: InputDecoration(
+                        labelText: "Cypher text",
+                        floatingLabelBehavior: FloatingLabelBehavior.always,
+                        border: OutlineInputBorder(),
+                      ),
+                    ),
+                  ),
+                ],
+              )
+            ],
+          ),
+        ),
+      ),
+    );
+  }
+}
--- a/4sem/isaip/03/AESCryptor/aes_cryptor/pubspec.lock
+++ b/4sem/isaip/03/AESCryptor/aes_cryptor/pubspec.lock
@ -0,0 +1,155 @@
+# Generated by pub
+# See https://dart.dev/tools/pub/glossary#lockfile
+packages:
+  async:
+    dependency: transitive
+    description:
+      name: async
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.5.0"
+  boolean_selector:
+    dependency: transitive
+    description:
+      name: boolean_selector
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.1.0"
+  characters:
+    dependency: transitive
+    description:
+      name: characters
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.1.0"
+  charcode:
+    dependency: transitive
+    description:
+      name: charcode
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.2.0"
+  clock:
+    dependency: transitive
+    description:
+      name: clock
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.1.0"
+  collection:
+    dependency: transitive
+    description:
+      name: collection
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.15.0"
+  fake_async:
+    dependency: transitive
+    description:
+      name: fake_async
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.2.0"
+  flutter:
+    dependency: "direct main"
+    description: flutter
+    source: sdk
+    version: "0.0.0"
+  flutter_test:
+    dependency: "direct dev"
+    description: flutter
+    source: sdk
+    version: "0.0.0"
+  matcher:
+    dependency: transitive
+    description:
+      name: matcher
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "0.12.10"
+  meta:
+    dependency: transitive
+    description:
+      name: meta
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.3.0"
+  path:
+    dependency: transitive
+    description:
+      name: path
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.8.0"
+  sky_engine:
+    dependency: transitive
+    description: flutter
+    source: sdk
+    version: "0.0.99"
+  source_span:
+    dependency: transitive
+    description:
+      name: source_span
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.8.0"
+  stack_trace:
+    dependency: transitive
+    description:
+      name: stack_trace
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.10.0"
+  stream_channel:
+    dependency: transitive
+    description:
+      name: stream_channel
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.1.0"
+  string_scanner:
+    dependency: transitive
+    description:
+      name: string_scanner
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.1.0"
+  term_glyph:
+    dependency: transitive
+    description:
+      name: term_glyph
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.2.0"
+  test_api:
+    dependency: transitive
+    description:
+      name: test_api
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "0.2.19"
+  typed_data:
+    dependency: transitive
+    description:
+      name: typed_data
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.3.0"
+  vector_math:
+    dependency: transitive
+    description:
+      name: vector_math
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.1.0"
+  window_size:
+    dependency: "direct main"
+    description:
+      path: "plugins/window_size"
+      ref: HEAD
+      resolved-ref: f2d8aa3820fb87316516670bf4d51a74de8ac0dd
+      url: "git://github.com/google/flutter-desktop-embedding.git"
+    source: git
+    version: "0.1.0"
+sdks:
+  dart: ">=2.12.0-0.0 <3.0.0"
--- a/4sem/isaip/03/AESCryptor/aes_cryptor/pubspec.yaml
+++ b/4sem/isaip/03/AESCryptor/aes_cryptor/pubspec.yaml
@ -0,0 +1,25 @@
+name: aes_cryptor
+description: AES Encryptor/Decryptor
+
+publish_to: 'none'
+
+version: 1.0.0+1
+
+environment:
+  sdk: ">=2.7.0 <3.0.0"
+
+dependencies:
+  flutter:
+    sdk: flutter
+
+  window_size:
+    git:
+      url: git://github.com/google/flutter-desktop-embedding.git
+      path: plugins/window_size
+
+dev_dependencies:
+  flutter_test:
+    sdk: flutter
+
+flutter:
+  uses-material-design: true
--- a/4sem/isaip/03/AESCryptor/aes_cryptor/test/aes_test.dart
+++ b/4sem/isaip/03/AESCryptor/aes_cryptor/test/aes_test.dart
@ -0,0 +1,64 @@
+import 'dart:typed_data';
+
+import 'package:aes_cryptor/aes/aes_crypt.dart';
+import 'package:flutter_test/flutter_test.dart';
+
+void main() {
+  group("Testing correctness of AES 256 CBC implementation", () {
+    test("Lots of random keys, same message", () {
+      for (int i = 0; i < 1000; i++) {
+        var cryptor = AESCrypt();
+        cryptor.setKeys(
+          cryptor.createKey(),
+          cryptor.createIV(),
+        );
+
+        var message = "test string";
+
+        var encrypted_message = cryptor.Encrypt(StringToBytes(PadString(message)));
+        var decrypted_data = cryptor.Decrypt(encrypted_message);
+        var decrypted_message = UnpadString(BytesToString(decrypted_data));
+
+        expect(decrypted_message, message);
+      }
+    });
+
+    test("Key as string", () {
+      var key = KeyFromString("lovely day!");
+
+      var iv = Uint8List.fromList([
+        0xca, 0x94, 0xbb, 0x12, 0x93, 0x1f, 0xa7, 0xaa, 0xd7, 0xa3, 0xe7, 0xbb, 0xef, 0x21, 0xbd, 0xe6
+      ]);
+
+      var message = "test message! :D";
+
+      var cryptor = AESCrypt();
+      cryptor.setKeys(key, iv);
+
+      var encrypted_message = cryptor.Encrypt(StringToBytes(PadString(message)));
+      var decrypted_data = cryptor.Decrypt(encrypted_message);
+      var decrypted_message = UnpadString(BytesToString(decrypted_data));
+
+      expect(decrypted_message, message);
+    });
+
+    test("Russian text", () {
+      var key = KeyFromString("lovely day!");
+
+      var iv = Uint8List.fromList([
+        0xca, 0x94, 0xbb, 0x12, 0x93, 0x1f, 0xa7, 0xaa, 0xd7, 0xa3, 0xe7, 0xbb, 0xef, 0x21, 0xbd, 0xe6
+      ]);
+
+      var message = "Даже на русском";
+
+      var cryptor = AESCrypt();
+      cryptor.setKeys(key, iv);
+
+      var encrypted_message = cryptor.Encrypt(StringToBytes(PadString(message)));
+      var decrypted_data = cryptor.Decrypt(encrypted_message);
+      var decrypted_message = UnpadString(BytesToString(decrypted_data));
+
+      expect(decrypted_message, message);
+    });
+  });
+}
--- a/4sem/isaip/03/AESCryptor/aes_cryptor/windows/.gitignore
+++ b/4sem/isaip/03/AESCryptor/aes_cryptor/windows/.gitignore
@ -0,0 +1,17 @@
+flutter/ephemeral/
+
+# Visual Studio user-specific files.
+*.suo
+*.user
+*.userosscache
+*.sln.docstates
+
+# Visual Studio build-related files.
+x64/
+x86/
+
+# Visual Studio cache files
+# files ending in .cache can be ignored
+*.[Cc]ache
+# but keep track of directories ending in .cache
+!*.[Cc]ache/
--- a/4sem/isaip/03/AESCryptor/aes_cryptor/windows/CMakeLists.txt
+++ b/4sem/isaip/03/AESCryptor/aes_cryptor/windows/CMakeLists.txt
@ -0,0 +1,95 @@
+cmake_minimum_required(VERSION 3.15)
+project(aes_cryptor LANGUAGES CXX)
+
+set(BINARY_NAME "aes_cryptor")
+
+cmake_policy(SET CMP0063 NEW)
+
+set(CMAKE_INSTALL_RPATH "$ORIGIN/lib")
+
+# Configure build options.
+get_property(IS_MULTICONFIG GLOBAL PROPERTY GENERATOR_IS_MULTI_CONFIG)
+if(IS_MULTICONFIG)
+  set(CMAKE_CONFIGURATION_TYPES "Debug;Profile;Release"
+    CACHE STRING "" FORCE)
+else()
+  if(NOT CMAKE_BUILD_TYPE AND NOT CMAKE_CONFIGURATION_TYPES)
+    set(CMAKE_BUILD_TYPE "Debug" CACHE
+      STRING "Flutter build mode" FORCE)
+    set_property(CACHE CMAKE_BUILD_TYPE PROPERTY STRINGS
+      "Debug" "Profile" "Release")
+  endif()
+endif()
+
+set(CMAKE_EXE_LINKER_FLAGS_PROFILE "${CMAKE_EXE_LINKER_FLAGS_RELEASE}")
+set(CMAKE_SHARED_LINKER_FLAGS_PROFILE "${CMAKE_SHARED_LINKER_FLAGS_RELEASE}")
+set(CMAKE_C_FLAGS_PROFILE "${CMAKE_C_FLAGS_RELEASE}")
+set(CMAKE_CXX_FLAGS_PROFILE "${CMAKE_CXX_FLAGS_RELEASE}")
+
+# Use Unicode for all projects.
+add_definitions(-DUNICODE -D_UNICODE)
+
+# Compilation settings that should be applied to most targets.
+function(APPLY_STANDARD_SETTINGS TARGET)
+  target_compile_features(${TARGET} PUBLIC cxx_std_17)
+  target_compile_options(${TARGET} PRIVATE /W4 /WX /wd"4100")
+  target_compile_options(${TARGET} PRIVATE /EHsc)
+  target_compile_definitions(${TARGET} PRIVATE "_HAS_EXCEPTIONS=0")
+  target_compile_definitions(${TARGET} PRIVATE "$<$<CONFIG:Debug>:_DEBUG>")
+endfunction()
+
+set(FLUTTER_MANAGED_DIR "${CMAKE_CURRENT_SOURCE_DIR}/flutter")
+
+# Flutter library and tool build rules.
+add_subdirectory(${FLUTTER_MANAGED_DIR})
+
+# Application build
+add_subdirectory("runner")
+
+# Generated plugin build rules, which manage building the plugins and adding
+# them to the application.
+include(flutter/generated_plugins.cmake)
+
+
+# === Installation ===
+# Support files are copied into place next to the executable, so that it can
+# run in place. This is done instead of making a separate bundle (as on Linux)
+# so that building and running from within Visual Studio will work.
+set(BUILD_BUNDLE_DIR "$<TARGET_FILE_DIR:${BINARY_NAME}>")
+# Make the "install" step default, as it's required to run.
+set(CMAKE_VS_INCLUDE_INSTALL_TO_DEFAULT_BUILD 1)
+if(CMAKE_INSTALL_PREFIX_INITIALIZED_TO_DEFAULT)
+  set(CMAKE_INSTALL_PREFIX "${BUILD_BUNDLE_DIR}" CACHE PATH "..." FORCE)
+endif()
+
+set(INSTALL_BUNDLE_DATA_DIR "${CMAKE_INSTALL_PREFIX}/data")
+set(INSTALL_BUNDLE_LIB_DIR "${CMAKE_INSTALL_PREFIX}")
+
+install(TARGETS ${BINARY_NAME} RUNTIME DESTINATION "${CMAKE_INSTALL_PREFIX}"
+  COMPONENT Runtime)
+
+install(FILES "${FLUTTER_ICU_DATA_FILE}" DESTINATION "${INSTALL_BUNDLE_DATA_DIR}"
+  COMPONENT Runtime)
+
+install(FILES "${FLUTTER_LIBRARY}" DESTINATION "${INSTALL_BUNDLE_LIB_DIR}"
+  COMPONENT Runtime)
+
+if(PLUGIN_BUNDLED_LIBRARIES)
+  install(FILES "${PLUGIN_BUNDLED_LIBRARIES}"
+    DESTINATION "${INSTALL_BUNDLE_LIB_DIR}"
+    COMPONENT Runtime)
+endif()
+
+# Fully re-copy the assets directory on each build to avoid having stale files
+# from a previous install.
+set(FLUTTER_ASSET_DIR_NAME "flutter_assets")
+install(CODE "
+  file(REMOVE_RECURSE \"${INSTALL_BUNDLE_DATA_DIR}/${FLUTTER_ASSET_DIR_NAME}\")
+  " COMPONENT Runtime)
+install(DIRECTORY "${PROJECT_BUILD_DIR}/${FLUTTER_ASSET_DIR_NAME}"
+  DESTINATION "${INSTALL_BUNDLE_DATA_DIR}" COMPONENT Runtime)
+
+# Install the AOT library on non-Debug builds only.
+install(FILES "${AOT_LIBRARY}" DESTINATION "${INSTALL_BUNDLE_DATA_DIR}"
+  CONFIGURATIONS Profile;Release
+  COMPONENT Runtime)
--- a/4sem/isaip/03/AESCryptor/aes_cryptor/windows/flutter/CMakeLists.txt
+++ b/4sem/isaip/03/AESCryptor/aes_cryptor/windows/flutter/CMakeLists.txt
@ -0,0 +1,103 @@
+cmake_minimum_required(VERSION 3.15)
+
+set(EPHEMERAL_DIR "${CMAKE_CURRENT_SOURCE_DIR}/ephemeral")
+
+# Configuration provided via flutter tool.
+include(${EPHEMERAL_DIR}/generated_config.cmake)
+
+# TODO: Move the rest of this into files in ephemeral. See
+# https://github.com/flutter/flutter/issues/57146.
+set(WRAPPER_ROOT "${EPHEMERAL_DIR}/cpp_client_wrapper")
+
+# === Flutter Library ===
+set(FLUTTER_LIBRARY "${EPHEMERAL_DIR}/flutter_windows.dll")
+
+# Published to parent scope for install step.
+set(FLUTTER_LIBRARY ${FLUTTER_LIBRARY} PARENT_SCOPE)
+set(FLUTTER_ICU_DATA_FILE "${EPHEMERAL_DIR}/icudtl.dat" PARENT_SCOPE)
+set(PROJECT_BUILD_DIR "${PROJECT_DIR}/build/" PARENT_SCOPE)
+set(AOT_LIBRARY "${PROJECT_DIR}/build/windows/app.so" PARENT_SCOPE)
+
+list(APPEND FLUTTER_LIBRARY_HEADERS
+  "flutter_export.h"
+  "flutter_windows.h"
+  "flutter_messenger.h"
+  "flutter_plugin_registrar.h"
+  "flutter_texture_registrar.h"
+)
+list(TRANSFORM FLUTTER_LIBRARY_HEADERS PREPEND "${EPHEMERAL_DIR}/")
+add_library(flutter INTERFACE)
+target_include_directories(flutter INTERFACE
+  "${EPHEMERAL_DIR}"
+)
+target_link_libraries(flutter INTERFACE "${FLUTTER_LIBRARY}.lib")
+add_dependencies(flutter flutter_assemble)
+
+# === Wrapper ===
+list(APPEND CPP_WRAPPER_SOURCES_CORE
+  "core_implementations.cc"
+  "standard_codec.cc"
+)
+list(TRANSFORM CPP_WRAPPER_SOURCES_CORE PREPEND "${WRAPPER_ROOT}/")
+list(APPEND CPP_WRAPPER_SOURCES_PLUGIN
+  "plugin_registrar.cc"
+)
+list(TRANSFORM CPP_WRAPPER_SOURCES_PLUGIN PREPEND "${WRAPPER_ROOT}/")
+list(APPEND CPP_WRAPPER_SOURCES_APP
+  "flutter_engine.cc"
+  "flutter_view_controller.cc"
+)
+list(TRANSFORM CPP_WRAPPER_SOURCES_APP PREPEND "${WRAPPER_ROOT}/")
+
+# Wrapper sources needed for a plugin.
+add_library(flutter_wrapper_plugin STATIC
+  ${CPP_WRAPPER_SOURCES_CORE}
+  ${CPP_WRAPPER_SOURCES_PLUGIN}
+)
+apply_standard_settings(flutter_wrapper_plugin)
+set_target_properties(flutter_wrapper_plugin PROPERTIES
+  POSITION_INDEPENDENT_CODE ON)
+set_target_properties(flutter_wrapper_plugin PROPERTIES
+  CXX_VISIBILITY_PRESET hidden)
+target_link_libraries(flutter_wrapper_plugin PUBLIC flutter)
+target_include_directories(flutter_wrapper_plugin PUBLIC
+  "${WRAPPER_ROOT}/include"
+)
+add_dependencies(flutter_wrapper_plugin flutter_assemble)
+
+# Wrapper sources needed for the runner.
+add_library(flutter_wrapper_app STATIC
+  ${CPP_WRAPPER_SOURCES_CORE}
+  ${CPP_WRAPPER_SOURCES_APP}
+)
+apply_standard_settings(flutter_wrapper_app)
+target_link_libraries(flutter_wrapper_app PUBLIC flutter)
+target_include_directories(flutter_wrapper_app PUBLIC
+  "${WRAPPER_ROOT}/include"
+)
+add_dependencies(flutter_wrapper_app flutter_assemble)
+
+# === Flutter tool backend ===
+# _phony_ is a non-existent file to force this command to run every time,
+# since currently there's no way to get a full input/output list from the
+# flutter tool.
+set(PHONY_OUTPUT "${CMAKE_CURRENT_BINARY_DIR}/_phony_")
+set_source_files_properties("${PHONY_OUTPUT}" PROPERTIES SYMBOLIC TRUE)
+add_custom_command(
+  OUTPUT ${FLUTTER_LIBRARY} ${FLUTTER_LIBRARY_HEADERS}
+    ${CPP_WRAPPER_SOURCES_CORE} ${CPP_WRAPPER_SOURCES_PLUGIN}
+    ${CPP_WRAPPER_SOURCES_APP}
+    ${PHONY_OUTPUT}
+  COMMAND ${CMAKE_COMMAND} -E env
+    ${FLUTTER_TOOL_ENVIRONMENT}
+    "${FLUTTER_ROOT}/packages/flutter_tools/bin/tool_backend.bat"
+      windows-x64 $<CONFIG>
+  VERBATIM
+)
+add_custom_target(flutter_assemble DEPENDS
+  "${FLUTTER_LIBRARY}"
+  ${FLUTTER_LIBRARY_HEADERS}
+  ${CPP_WRAPPER_SOURCES_CORE}
+  ${CPP_WRAPPER_SOURCES_PLUGIN}
+  ${CPP_WRAPPER_SOURCES_APP}
+)
--- a/4sem/isaip/03/AESCryptor/aes_cryptor/windows/flutter/generated_plugin_registrant.cc
+++ b/4sem/isaip/03/AESCryptor/aes_cryptor/windows/flutter/generated_plugin_registrant.cc
@ -0,0 +1,12 @@
+//
+//  Generated file. Do not edit.
+//
+
+#include "generated_plugin_registrant.h"
+
+#include <window_size/window_size_plugin.h>
+
+void RegisterPlugins(flutter::PluginRegistry* registry) {
+  WindowSizePluginRegisterWithRegistrar(
+      registry->GetRegistrarForPlugin("WindowSizePlugin"));
+}
--- a/4sem/isaip/03/AESCryptor/aes_cryptor/windows/flutter/generated_plugin_registrant.h
+++ b/4sem/isaip/03/AESCryptor/aes_cryptor/windows/flutter/generated_plugin_registrant.h
@ -0,0 +1,13 @@
+//
+//  Generated file. Do not edit.
+//
+
+#ifndef GENERATED_PLUGIN_REGISTRANT_
+#define GENERATED_PLUGIN_REGISTRANT_
+
+#include <flutter/plugin_registry.h>
+
+// Registers Flutter plugins.
+void RegisterPlugins(flutter::PluginRegistry* registry);
+
+#endif  // GENERATED_PLUGIN_REGISTRANT_
--- a/4sem/isaip/03/AESCryptor/aes_cryptor/windows/flutter/generated_plugins.cmake
+++ b/4sem/isaip/03/AESCryptor/aes_cryptor/windows/flutter/generated_plugins.cmake
@ -0,0 +1,16 @@
+#
+# Generated file, do not edit.
+#
+
+list(APPEND FLUTTER_PLUGIN_LIST
+  window_size
+)
+
+set(PLUGIN_BUNDLED_LIBRARIES)
+
+foreach(plugin ${FLUTTER_PLUGIN_LIST})
+  add_subdirectory(flutter/ephemeral/.plugin_symlinks/${plugin}/windows plugins/${plugin})
+  target_link_libraries(${BINARY_NAME} PRIVATE ${plugin}_plugin)
+  list(APPEND PLUGIN_BUNDLED_LIBRARIES $<TARGET_FILE:${plugin}_plugin>)
+  list(APPEND PLUGIN_BUNDLED_LIBRARIES ${${plugin}_bundled_libraries})
+endforeach(plugin)
--- a/4sem/isaip/03/AESCryptor/aes_cryptor/windows/runner/CMakeLists.txt
+++ b/4sem/isaip/03/AESCryptor/aes_cryptor/windows/runner/CMakeLists.txt
@ -0,0 +1,18 @@
+cmake_minimum_required(VERSION 3.15)
+project(runner LANGUAGES CXX)
+
+add_executable(${BINARY_NAME} WIN32
+  "flutter_window.cpp"
+  "main.cpp"
+  "run_loop.cpp"
+  "utils.cpp"
+  "win32_window.cpp"
+  "${FLUTTER_MANAGED_DIR}/generated_plugin_registrant.cc"
+  "Runner.rc"
+  "runner.exe.manifest"
+)
+apply_standard_settings(${BINARY_NAME})
+target_compile_definitions(${BINARY_NAME} PRIVATE "NOMINMAX")
+target_link_libraries(${BINARY_NAME} PRIVATE flutter flutter_wrapper_app)
+target_include_directories(${BINARY_NAME} PRIVATE "${CMAKE_SOURCE_DIR}")
+add_dependencies(${BINARY_NAME} flutter_assemble)
--- a/4sem/isaip/03/AESCryptor/aes_cryptor/windows/runner/Runner.rc
+++ b/4sem/isaip/03/AESCryptor/aes_cryptor/windows/runner/Runner.rc
@ -0,0 +1,121 @@
+// Microsoft Visual C++ generated resource script.
+//
+#pragma code_page(65001)
+#include "resource.h"
+
+#define APSTUDIO_READONLY_SYMBOLS
+/////////////////////////////////////////////////////////////////////////////
+//
+// Generated from the TEXTINCLUDE 2 resource.
+//
+#include "winres.h"
+
+/////////////////////////////////////////////////////////////////////////////
+#undef APSTUDIO_READONLY_SYMBOLS
+
+/////////////////////////////////////////////////////////////////////////////
+// English (United States) resources
+
+#if !defined(AFX_RESOURCE_DLL) || defined(AFX_TARG_ENU)
+LANGUAGE LANG_ENGLISH, SUBLANG_ENGLISH_US
+
+#ifdef APSTUDIO_INVOKED
+/////////////////////////////////////////////////////////////////////////////
+//
+// TEXTINCLUDE
+//
+
+1 TEXTINCLUDE
+BEGIN
+    "resource.h\0"
+END
+
+2 TEXTINCLUDE
+BEGIN
+    "#include ""winres.h""\r\n"
+    "\0"
+END
+
+3 TEXTINCLUDE
+BEGIN
+    "\r\n"
+    "\0"
+END
+
+#endif    // APSTUDIO_INVOKED
+
+
+/////////////////////////////////////////////////////////////////////////////
+//
+// Icon
+//
+
+// Icon with lowest ID value placed first to ensure application icon
+// remains consistent on all systems.
+IDI_APP_ICON            ICON                    "resources\\app_icon.ico"
+
+
+/////////////////////////////////////////////////////////////////////////////
+//
+// Version
+//
+
+#ifdef FLUTTER_BUILD_NUMBER
+#define VERSION_AS_NUMBER FLUTTER_BUILD_NUMBER
+#else
+#define VERSION_AS_NUMBER 1,0,0
+#endif
+
+#ifdef FLUTTER_BUILD_NAME
+#define VERSION_AS_STRING #FLUTTER_BUILD_NAME
+#else
+#define VERSION_AS_STRING "1.0.0"
+#endif
+
+VS_VERSION_INFO VERSIONINFO
+ FILEVERSION VERSION_AS_NUMBER
+ PRODUCTVERSION VERSION_AS_NUMBER
+ FILEFLAGSMASK VS_FFI_FILEFLAGSMASK
+#ifdef _DEBUG
+ FILEFLAGS VS_FF_DEBUG
+#else
+ FILEFLAGS 0x0L
+#endif
+ FILEOS VOS__WINDOWS32
+ FILETYPE VFT_APP
+ FILESUBTYPE 0x0L
+BEGIN
+    BLOCK "StringFileInfo"
+    BEGIN
+        BLOCK "040904e4"
+        BEGIN
+            VALUE "CompanyName", "xyz.nuark" "\0"
+            VALUE "FileDescription", "AES Encryptor/Decryptor" "\0"
+            VALUE "FileVersion", VERSION_AS_STRING "\0"
+            VALUE "InternalName", "aes_cryptor" "\0"
+            VALUE "LegalCopyright", "Copyright (C) 2021 xyz.nuark. All rights reserved." "\0"
+            VALUE "OriginalFilename", "aes_cryptor.exe" "\0"
+            VALUE "ProductName", "aes_cryptor" "\0"
+            VALUE "ProductVersion", VERSION_AS_STRING "\0"
+        END
+    END
+    BLOCK "VarFileInfo"
+    BEGIN
+        VALUE "Translation", 0x409, 1252
+    END
+END
+
+#endif    // English (United States) resources
+/////////////////////////////////////////////////////////////////////////////
+
+
+
+#ifndef APSTUDIO_INVOKED
+/////////////////////////////////////////////////////////////////////////////
+//
+// Generated from the TEXTINCLUDE 3 resource.
+//
+
+
+/////////////////////////////////////////////////////////////////////////////
+#endif    // not APSTUDIO_INVOKED
--- a/4sem/isaip/03/AESCryptor/aes_cryptor/windows/runner/flutter_window.cpp
+++ b/4sem/isaip/03/AESCryptor/aes_cryptor/windows/runner/flutter_window.cpp
@ -0,0 +1,64 @@
+#include "flutter_window.h"
+
+#include <optional>
+
+#include "flutter/generated_plugin_registrant.h"
+
+FlutterWindow::FlutterWindow(RunLoop* run_loop,
+                             const flutter::DartProject& project)
+    : run_loop_(run_loop), project_(project) {}
+
+FlutterWindow::~FlutterWindow() {}
+
+bool FlutterWindow::OnCreate() {
+  if (!Win32Window::OnCreate()) {
+    return false;
+  }
+
+  RECT frame = GetClientArea();
+
+  // The size here must match the window dimensions to avoid unnecessary surface
+  // creation / destruction in the startup path.
+  flutter_controller_ = std::make_unique<flutter::FlutterViewController>(
+      frame.right - frame.left, frame.bottom - frame.top, project_);
+  // Ensure that basic setup of the controller was successful.
+  if (!flutter_controller_->engine() || !flutter_controller_->view()) {
+    return false;
+  }
+  RegisterPlugins(flutter_controller_->engine());
+  run_loop_->RegisterFlutterInstance(flutter_controller_->engine());
+  SetChildContent(flutter_controller_->view()->GetNativeWindow());
+  return true;
+}
+
+void FlutterWindow::OnDestroy() {
+  if (flutter_controller_) {
+    run_loop_->UnregisterFlutterInstance(flutter_controller_->engine());
+    flutter_controller_ = nullptr;
+  }
+
+  Win32Window::OnDestroy();
+}
+
+LRESULT
+FlutterWindow::MessageHandler(HWND hwnd, UINT const message,
+                              WPARAM const wparam,
+                              LPARAM const lparam) noexcept {
+  // Give Flutter, including plugins, an opporutunity to handle window messages.
+  if (flutter_controller_) {
+    std::optional<LRESULT> result =
+        flutter_controller_->HandleTopLevelWindowProc(hwnd, message, wparam,
+                                                      lparam);
+    if (result) {
+      return *result;
+    }
+  }
+
+  switch (message) {
+    case WM_FONTCHANGE:
+      flutter_controller_->engine()->ReloadSystemFonts();
+      break;
+  }
+
+  return Win32Window::MessageHandler(hwnd, message, wparam, lparam);
+}
--- a/4sem/isaip/03/AESCryptor/aes_cryptor/windows/runner/flutter_window.h
+++ b/4sem/isaip/03/AESCryptor/aes_cryptor/windows/runner/flutter_window.h
@ -0,0 +1,39 @@
+#ifndef RUNNER_FLUTTER_WINDOW_H_
+#define RUNNER_FLUTTER_WINDOW_H_
+
+#include <flutter/dart_project.h>
+#include <flutter/flutter_view_controller.h>
+
+#include <memory>
+
+#include "run_loop.h"
+#include "win32_window.h"
+
+// A window that does nothing but host a Flutter view.
+class FlutterWindow : public Win32Window {
+ public:
+  // Creates a new FlutterWindow driven by the |run_loop|, hosting a
+  // Flutter view running |project|.
+  explicit FlutterWindow(RunLoop* run_loop,
+                         const flutter::DartProject& project);
+  virtual ~FlutterWindow();
+
+ protected:
+  // Win32Window:
+  bool OnCreate() override;
+  void OnDestroy() override;
+  LRESULT MessageHandler(HWND window, UINT const message, WPARAM const wparam,
+                         LPARAM const lparam) noexcept override;
+
+ private:
+  // The run loop driving events for this window.
+  RunLoop* run_loop_;
+
+  // The project to run.
+  flutter::DartProject project_;
+
+  // The Flutter instance hosted by this window.
+  std::unique_ptr<flutter::FlutterViewController> flutter_controller_;
+};
+
+#endif  // RUNNER_FLUTTER_WINDOW_H_
--- a/4sem/isaip/03/AESCryptor/aes_cryptor/windows/runner/main.cpp
+++ b/4sem/isaip/03/AESCryptor/aes_cryptor/windows/runner/main.cpp
@ -0,0 +1,42 @@
+#include <flutter/dart_project.h>
+#include <flutter/flutter_view_controller.h>
+#include <windows.h>
+
+#include "flutter_window.h"
+#include "run_loop.h"
+#include "utils.h"
+
+int APIENTRY wWinMain(_In_ HINSTANCE instance, _In_opt_ HINSTANCE prev,
+                      _In_ wchar_t *command_line, _In_ int show_command) {
+  // Attach to console when present (e.g., 'flutter run') or create a
+  // new console when running with a debugger.
+  if (!::AttachConsole(ATTACH_PARENT_PROCESS) && ::IsDebuggerPresent()) {
+    CreateAndAttachConsole();
+  }
+
+  // Initialize COM, so that it is available for use in the library and/or
+  // plugins.
+  ::CoInitializeEx(nullptr, COINIT_APARTMENTTHREADED);
+
+  RunLoop run_loop;
+
+  flutter::DartProject project(L"data");
+
+  std::vector<std::string> command_line_arguments =
+      GetCommandLineArguments();
+
+  project.set_dart_entrypoint_arguments(std::move(command_line_arguments));
+
+  FlutterWindow window(&run_loop, project);
+  Win32Window::Point origin(10, 10);
+  Win32Window::Size size(1280, 720);
+  if (!window.CreateAndShow(L"AES Cryptor", origin, size)) {
+    return EXIT_FAILURE;
+  }
+  window.SetQuitOnClose(true);
+
+  run_loop.Run();
+
+  ::CoUninitialize();
+  return EXIT_SUCCESS;
+}
--- a/4sem/isaip/03/AESCryptor/aes_cryptor/windows/runner/resource.h
+++ b/4sem/isaip/03/AESCryptor/aes_cryptor/windows/runner/resource.h
@ -0,0 +1,16 @@
+//{{NO_DEPENDENCIES}}
+// Microsoft Visual C++ generated include file.
+// Used by Runner.rc
+//
+#define IDI_APP_ICON                    101
+
+// Next default values for new objects
+//
+#ifdef APSTUDIO_INVOKED
+#ifndef APSTUDIO_READONLY_SYMBOLS
+#define _APS_NEXT_RESOURCE_VALUE        102
+#define _APS_NEXT_COMMAND_VALUE         40001
+#define _APS_NEXT_CONTROL_VALUE         1001
+#define _APS_NEXT_SYMED_VALUE           101
+#endif
+#endif
--- a/4sem/isaip/03/AESCryptor/aes_cryptor/windows/runner/resources/app_icon.ico
+++ b/4sem/isaip/03/AESCryptor/aes_cryptor/windows/runner/resources/app_icon.ico
--- a/4sem/isaip/03/AESCryptor/aes_cryptor/windows/runner/run_loop.cpp
+++ b/4sem/isaip/03/AESCryptor/aes_cryptor/windows/runner/run_loop.cpp
@ -0,0 +1,66 @@
+#include "run_loop.h"
+
+#include <windows.h>
+
+#include <algorithm>
+
+RunLoop::RunLoop() {}
+
+RunLoop::~RunLoop() {}
+
+void RunLoop::Run() {
+  bool keep_running = true;
+  TimePoint next_flutter_event_time = TimePoint::clock::now();
+  while (keep_running) {
+    std::chrono::nanoseconds wait_duration =
+        std::max(std::chrono::nanoseconds(0),
+                 next_flutter_event_time - TimePoint::clock::now());
+    ::MsgWaitForMultipleObjects(
+        0, nullptr, FALSE, static_cast<DWORD>(wait_duration.count() / 1000),
+        QS_ALLINPUT);
+    bool processed_events = false;
+    MSG message;
+    // All pending Windows messages must be processed; MsgWaitForMultipleObjects
+    // won't return again for items left in the queue after PeekMessage.
+    while (::PeekMessage(&message, nullptr, 0, 0, PM_REMOVE)) {
+      processed_events = true;
+      if (message.message == WM_QUIT) {
+        keep_running = false;
+        break;
+      }
+      ::TranslateMessage(&message);
+      ::DispatchMessage(&message);
+      // Allow Flutter to process messages each time a Windows message is
+      // processed, to prevent starvation.
+      next_flutter_event_time =
+          std::min(next_flutter_event_time, ProcessFlutterMessages());
+    }
+    // If the PeekMessage loop didn't run, process Flutter messages.
+    if (!processed_events) {
+      next_flutter_event_time =
+          std::min(next_flutter_event_time, ProcessFlutterMessages());
+    }
+  }
+}
+
+void RunLoop::RegisterFlutterInstance(
+    flutter::FlutterEngine* flutter_instance) {
+  flutter_instances_.insert(flutter_instance);
+}
+
+void RunLoop::UnregisterFlutterInstance(
+    flutter::FlutterEngine* flutter_instance) {
+  flutter_instances_.erase(flutter_instance);
+}
+
+RunLoop::TimePoint RunLoop::ProcessFlutterMessages() {
+  TimePoint next_event_time = TimePoint::max();
+  for (auto instance : flutter_instances_) {
+    std::chrono::nanoseconds wait_duration = instance->ProcessMessages();
+    if (wait_duration != std::chrono::nanoseconds::max()) {
+      next_event_time =
+          std::min(next_event_time, TimePoint::clock::now() + wait_duration);
+    }
+  }
+  return next_event_time;
+}
--- a/4sem/isaip/03/AESCryptor/aes_cryptor/windows/runner/run_loop.h
+++ b/4sem/isaip/03/AESCryptor/aes_cryptor/windows/runner/run_loop.h
@ -0,0 +1,40 @@
+#ifndef RUNNER_RUN_LOOP_H_
+#define RUNNER_RUN_LOOP_H_
+
+#include <flutter/flutter_engine.h>
+
+#include <chrono>
+#include <set>
+
+// A runloop that will service events for Flutter instances as well
+// as native messages.
+class RunLoop {
+ public:
+  RunLoop();
+  ~RunLoop();
+
+  // Prevent copying
+  RunLoop(RunLoop const&) = delete;
+  RunLoop& operator=(RunLoop const&) = delete;
+
+  // Runs the run loop until the application quits.
+  void Run();
+
+  // Registers the given Flutter instance for event servicing.
+  void RegisterFlutterInstance(
+      flutter::FlutterEngine* flutter_instance);
+
+  // Unregisters the given Flutter instance from event servicing.
+  void UnregisterFlutterInstance(
+      flutter::FlutterEngine* flutter_instance);
+
+ private:
+  using TimePoint = std::chrono::steady_clock::time_point;
+
+  // Processes all currently pending messages for registered Flutter instances.
+  TimePoint ProcessFlutterMessages();
+
+  std::set<flutter::FlutterEngine*> flutter_instances_;
+};
+
+#endif  // RUNNER_RUN_LOOP_H_
--- a/4sem/isaip/03/AESCryptor/aes_cryptor/windows/runner/runner.exe.manifest
+++ b/4sem/isaip/03/AESCryptor/aes_cryptor/windows/runner/runner.exe.manifest
@ -0,0 +1,20 @@
+<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
+<assembly xmlns="urn:schemas-microsoft-com:asm.v1" manifestVersion="1.0">
+  <application xmlns="urn:schemas-microsoft-com:asm.v3">
+    <windowsSettings>
+      <dpiAwareness xmlns="http://schemas.microsoft.com/SMI/2016/WindowsSettings">PerMonitorV2</dpiAwareness>
+    </windowsSettings>
+  </application>
+  <compatibility xmlns="urn:schemas-microsoft-com:compatibility.v1">
+    <application>
+      <!-- Windows 10 -->
+      <supportedOS Id="{8e0f7a12-bfb3-4fe8-b9a5-48fd50a15a9a}"/>
+      <!-- Windows 8.1 -->
+      <supportedOS Id="{1f676c76-80e1-4239-95bb-83d0f6d0da78}"/>
+      <!-- Windows 8 -->
+      <supportedOS Id="{4a2f28e3-53b9-4441-ba9c-d69d4a4a6e38}"/>
+      <!-- Windows 7 -->
+      <supportedOS Id="{35138b9a-5d96-4fbd-8e2d-a2440225f93a}"/>
+    </application>
+  </compatibility>
+</assembly>
--- a/4sem/isaip/03/AESCryptor/aes_cryptor/windows/runner/utils.cpp
+++ b/4sem/isaip/03/AESCryptor/aes_cryptor/windows/runner/utils.cpp
@ -0,0 +1,64 @@
+#include "utils.h"
+
+#include <flutter_windows.h>
+#include <io.h>
+#include <stdio.h>
+#include <windows.h>
+
+#include <iostream>
+
+void CreateAndAttachConsole() {
+  if (::AllocConsole()) {
+    FILE *unused;
+    if (freopen_s(&unused, "CONOUT$", "w", stdout)) {
+      _dup2(_fileno(stdout), 1);
+    }
+    if (freopen_s(&unused, "CONOUT$", "w", stderr)) {
+      _dup2(_fileno(stdout), 2);
+    }
+    std::ios::sync_with_stdio();
+    FlutterDesktopResyncOutputStreams();
+  }
+}
+
+std::vector<std::string> GetCommandLineArguments() {
+  // Convert the UTF-16 command line arguments to UTF-8 for the Engine to use.
+  int argc;
+  wchar_t** argv = ::CommandLineToArgvW(::GetCommandLineW(), &argc);
+  if (argv == nullptr) {
+    return std::vector<std::string>();
+  }
+
+  std::vector<std::string> command_line_arguments;
+
+  // Skip the first argument as it's the binary name.
+  for (int i = 1; i < argc; i++) {
+    command_line_arguments.push_back(Utf8FromUtf16(argv[i]));
+  }
+
+  ::LocalFree(argv);
+
+  return command_line_arguments;
+}
+
+std::string Utf8FromUtf16(const wchar_t* utf16_string) {
+  if (utf16_string == nullptr) {
+    return std::string();
+  }
+  int target_length = ::WideCharToMultiByte(
+      CP_UTF8, WC_ERR_INVALID_CHARS, utf16_string,
+      -1, nullptr, 0, nullptr, nullptr);
+  if (target_length == 0) {
+    return std::string();
+  }
+  std::string utf8_string;
+  utf8_string.resize(target_length);
+  int converted_length = ::WideCharToMultiByte(
+      CP_UTF8, WC_ERR_INVALID_CHARS, utf16_string,
+      -1, utf8_string.data(),
+      target_length, nullptr, nullptr);
+  if (converted_length == 0) {
+    return std::string();
+  }
+  return utf8_string;
+}
--- a/4sem/isaip/03/AESCryptor/aes_cryptor/windows/runner/utils.h
+++ b/4sem/isaip/03/AESCryptor/aes_cryptor/windows/runner/utils.h
@ -0,0 +1,19 @@
+#ifndef RUNNER_UTILS_H_
+#define RUNNER_UTILS_H_
+
+#include <string>
+#include <vector>
+
+// Creates a console for the process, and redirects stdout and stderr to
+// it for both the runner and the Flutter library.
+void CreateAndAttachConsole();
+
+// Takes a null-terminated wchar_t* encoded in UTF-16 and returns a std::string
+// encoded in UTF-8. Returns an empty std::string on failure.
+std::string Utf8FromUtf16(const wchar_t* utf16_string);
+
+// Gets the command line arguments passed in as a std::vector<std::string>,
+// encoded in UTF-8. Returns an empty std::vector<std::string> on failure.
+std::vector<std::string> GetCommandLineArguments();
+
+#endif  // RUNNER_UTILS_H_
--- a/4sem/isaip/03/AESCryptor/aes_cryptor/windows/runner/win32_window.cpp
+++ b/4sem/isaip/03/AESCryptor/aes_cryptor/windows/runner/win32_window.cpp
@ -0,0 +1,245 @@
+#include "win32_window.h"
+
+#include <flutter_windows.h>
+
+#include "resource.h"
+
+namespace {
+
+constexpr const wchar_t kWindowClassName[] = L"FLUTTER_RUNNER_WIN32_WINDOW";
+
+// The number of Win32Window objects that currently exist.
+static int g_active_window_count = 0;
+
+using EnableNonClientDpiScaling = BOOL __stdcall(HWND hwnd);
+
+// Scale helper to convert logical scaler values to physical using passed in
+// scale factor
+int Scale(int source, double scale_factor) {
+  return static_cast<int>(source * scale_factor);
+}
+
+// Dynamically loads the |EnableNonClientDpiScaling| from the User32 module.
+// This API is only needed for PerMonitor V1 awareness mode.
+void EnableFullDpiSupportIfAvailable(HWND hwnd) {
+  HMODULE user32_module = LoadLibraryA("User32.dll");
+  if (!user32_module) {
+    return;
+  }
+  auto enable_non_client_dpi_scaling =
+      reinterpret_cast<EnableNonClientDpiScaling*>(
+          GetProcAddress(user32_module, "EnableNonClientDpiScaling"));
+  if (enable_non_client_dpi_scaling != nullptr) {
+    enable_non_client_dpi_scaling(hwnd);
+    FreeLibrary(user32_module);
+  }
+}
+
+}  // namespace
+
+// Manages the Win32Window's window class registration.
+class WindowClassRegistrar {
+ public:
+  ~WindowClassRegistrar() = default;
+
+  // Returns the singleton registar instance.
+  static WindowClassRegistrar* GetInstance() {
+    if (!instance_) {
+      instance_ = new WindowClassRegistrar();
+    }
+    return instance_;
+  }
+
+  // Returns the name of the window class, registering the class if it hasn't
+  // previously been registered.
+  const wchar_t* GetWindowClass();
+
+  // Unregisters the window class. Should only be called if there are no
+  // instances of the window.
+  void UnregisterWindowClass();
+
+ private:
+  WindowClassRegistrar() = default;
+
+  static WindowClassRegistrar* instance_;
+
+  bool class_registered_ = false;
+};
+
+WindowClassRegistrar* WindowClassRegistrar::instance_ = nullptr;
+
+const wchar_t* WindowClassRegistrar::GetWindowClass() {
+  if (!class_registered_) {
+    WNDCLASS window_class{};
+    window_class.hCursor = LoadCursor(nullptr, IDC_ARROW);
+    window_class.lpszClassName = kWindowClassName;
+    window_class.style = CS_HREDRAW | CS_VREDRAW;
+    window_class.cbClsExtra = 0;
+    window_class.cbWndExtra = 0;
+    window_class.hInstance = GetModuleHandle(nullptr);
+    window_class.hIcon =
+        LoadIcon(window_class.hInstance, MAKEINTRESOURCE(IDI_APP_ICON));
+    window_class.hbrBackground = 0;
+    window_class.lpszMenuName = nullptr;
+    window_class.lpfnWndProc = Win32Window::WndProc;
+    RegisterClass(&window_class);
+    class_registered_ = true;
+  }
+  return kWindowClassName;
+}
+
+void WindowClassRegistrar::UnregisterWindowClass() {
+  UnregisterClass(kWindowClassName, nullptr);
+  class_registered_ = false;
+}
+
+Win32Window::Win32Window() {
+  ++g_active_window_count;
+}
+
+Win32Window::~Win32Window() {
+  --g_active_window_count;
+  Destroy();
+}
+
+bool Win32Window::CreateAndShow(const std::wstring& title,
+                                const Point& origin,
+                                const Size& size) {
+  Destroy();
+
+  const wchar_t* window_class =
+      WindowClassRegistrar::GetInstance()->GetWindowClass();
+
+  const POINT target_point = {static_cast<LONG>(origin.x),
+                              static_cast<LONG>(origin.y)};
+  HMONITOR monitor = MonitorFromPoint(target_point, MONITOR_DEFAULTTONEAREST);
+  UINT dpi = FlutterDesktopGetDpiForMonitor(monitor);
+  double scale_factor = dpi / 96.0;
+
+  HWND window = CreateWindow(
+      window_class, title.c_str(), WS_OVERLAPPEDWINDOW | WS_VISIBLE,
+      Scale(origin.x, scale_factor), Scale(origin.y, scale_factor),
+      Scale(size.width, scale_factor), Scale(size.height, scale_factor),
+      nullptr, nullptr, GetModuleHandle(nullptr), this);
+
+  if (!window) {
+    return false;
+  }
+
+  return OnCreate();
+}
+
+// static
+LRESULT CALLBACK Win32Window::WndProc(HWND const window,
+                                      UINT const message,
+                                      WPARAM const wparam,
+                                      LPARAM const lparam) noexcept {
+  if (message == WM_NCCREATE) {
+    auto window_struct = reinterpret_cast<CREATESTRUCT*>(lparam);
+    SetWindowLongPtr(window, GWLP_USERDATA,
+                     reinterpret_cast<LONG_PTR>(window_struct->lpCreateParams));
+
+    auto that = static_cast<Win32Window*>(window_struct->lpCreateParams);
+    EnableFullDpiSupportIfAvailable(window);
+    that->window_handle_ = window;
+  } else if (Win32Window* that = GetThisFromHandle(window)) {
+    return that->MessageHandler(window, message, wparam, lparam);
+  }
+
+  return DefWindowProc(window, message, wparam, lparam);
+}
+
+LRESULT
+Win32Window::MessageHandler(HWND hwnd,
+                            UINT const message,
+                            WPARAM const wparam,
+                            LPARAM const lparam) noexcept {
+  switch (message) {
+    case WM_DESTROY:
+      window_handle_ = nullptr;
+      Destroy();
+      if (quit_on_close_) {
+        PostQuitMessage(0);
+      }
+      return 0;
+
+    case WM_DPICHANGED: {
+      auto newRectSize = reinterpret_cast<RECT*>(lparam);
+      LONG newWidth = newRectSize->right - newRectSize->left;
+      LONG newHeight = newRectSize->bottom - newRectSize->top;
+
+      SetWindowPos(hwnd, nullptr, newRectSize->left, newRectSize->top, newWidth,
+                   newHeight, SWP_NOZORDER | SWP_NOACTIVATE);
+
+      return 0;
+    }
+    case WM_SIZE: {
+      RECT rect = GetClientArea();
+      if (child_content_ != nullptr) {
+        // Size and position the child window.
+        MoveWindow(child_content_, rect.left, rect.top, rect.right - rect.left,
+                   rect.bottom - rect.top, TRUE);
+      }
+      return 0;
+    }
+
+    case WM_ACTIVATE:
+      if (child_content_ != nullptr) {
+        SetFocus(child_content_);
+      }
+      return 0;
+  }
+
+  return DefWindowProc(window_handle_, message, wparam, lparam);
+}
+
+void Win32Window::Destroy() {
+  OnDestroy();
+
+  if (window_handle_) {
+    DestroyWindow(window_handle_);
+    window_handle_ = nullptr;
+  }
+  if (g_active_window_count == 0) {
+    WindowClassRegistrar::GetInstance()->UnregisterWindowClass();
+  }
+}
+
+Win32Window* Win32Window::GetThisFromHandle(HWND const window) noexcept {
+  return reinterpret_cast<Win32Window*>(
+      GetWindowLongPtr(window, GWLP_USERDATA));
+}
+
+void Win32Window::SetChildContent(HWND content) {
+  child_content_ = content;
+  SetParent(content, window_handle_);
+  RECT frame = GetClientArea();
+
+  MoveWindow(content, frame.left, frame.top, frame.right - frame.left,
+             frame.bottom - frame.top, true);
+
+  SetFocus(child_content_);
+}
+
+RECT Win32Window::GetClientArea() {
+  RECT frame;
+  GetClientRect(window_handle_, &frame);
+  return frame;
+}
+
+HWND Win32Window::GetHandle() {
+  return window_handle_;
+}
+
+void Win32Window::SetQuitOnClose(bool quit_on_close) {
+  quit_on_close_ = quit_on_close;
+}
+
+bool Win32Window::OnCreate() {
+  // No-op; provided for subclasses.
+  return true;
+}
+
+void Win32Window::OnDestroy() {
+  // No-op; provided for subclasses.
+}
--- a/4sem/isaip/03/AESCryptor/aes_cryptor/windows/runner/win32_window.h
+++ b/4sem/isaip/03/AESCryptor/aes_cryptor/windows/runner/win32_window.h
@ -0,0 +1,98 @@
+#ifndef RUNNER_WIN32_WINDOW_H_
+#define RUNNER_WIN32_WINDOW_H_
+
+#include <windows.h>
+
+#include <functional>
+#include <memory>
+#include <string>
+
+// A class abstraction for a high DPI-aware Win32 Window. Intended to be
+// inherited from by classes that wish to specialize with custom
+// rendering and input handling
+class Win32Window {
+ public:
+  struct Point {
+    unsigned int x;
+    unsigned int y;
+    Point(unsigned int x, unsigned int y) : x(x), y(y) {}
+  };
+
+  struct Size {
+    unsigned int width;
+    unsigned int height;
+    Size(unsigned int width, unsigned int height)
+        : width(width), height(height) {}
+  };
+
+  Win32Window();
+  virtual ~Win32Window();
+
+  // Creates and shows a win32 window with |title| and position and size using
+  // |origin| and |size|. New windows are created on the default monitor. Window
+  // sizes are specified to the OS in physical pixels, hence to ensure a
+  // consistent size to will treat the width height passed in to this function
+  // as logical pixels and scale to appropriate for the default monitor. Returns
+  // true if the window was created successfully.
+  bool CreateAndShow(const std::wstring& title,
+                     const Point& origin,
+                     const Size& size);
+
+  // Release OS resources associated with window.
+  void Destroy();
+
+  // Inserts |content| into the window tree.
+  void SetChildContent(HWND content);
+
+  // Returns the backing Window handle to enable clients to set icon and other
+  // window properties. Returns nullptr if the window has been destroyed.
+  HWND GetHandle();
+
+  // If true, closing this window will quit the application.
+  void SetQuitOnClose(bool quit_on_close);
+
+  // Return a RECT representing the bounds of the current client area.
+  RECT GetClientArea();
+
+ protected:
+  // Processes and route salient window messages for mouse handling,
+  // size change and DPI. Delegates handling of these to member overloads that
+  // inheriting classes can handle.
+  virtual LRESULT MessageHandler(HWND window,
+                                 UINT const message,
+                                 WPARAM const wparam,
+                                 LPARAM const lparam) noexcept;
+
+  // Called when CreateAndShow is called, allowing subclass window-related
+  // setup. Subclasses should return false if setup fails.
+  virtual bool OnCreate();
+
+  // Called when Destroy is called.
+  virtual void OnDestroy();
+
+ private:
+  friend class WindowClassRegistrar;
+
+  // OS callback called by message pump. Handles the WM_NCCREATE message which
+  // is passed when the non-client area is being created and enables automatic
+  // non-client DPI scaling so that the non-client area automatically
+  // responsponds to changes in DPI. All other messages are handled by
+  // MessageHandler.
+  static LRESULT CALLBACK WndProc(HWND const window,
+                                  UINT const message,
+                                  WPARAM const wparam,
+                                  LPARAM const lparam) noexcept;
+
+  // Retrieves a class instance pointer for |window|
+  static Win32Window* GetThisFromHandle(HWND const window) noexcept;
+
+  bool quit_on_close_ = false;
+
+  // window handle for top level window.
+  HWND window_handle_ = nullptr;
+
+  // window handle for hosted content.
+  HWND child_content_ = nullptr;
+};
+
+#endif  // RUNNER_WIN32_WINDOW_H_