Finish implementing some encryption in the network protocols with AES

test/encryption_test.dart

@@ -0,0 +1,43 @@
+import 'dart:convert';
+import 'dart:io';
+
+import 'package:libac_dart/encryption/aes.dart';
+import 'package:libac_dart/encryption/xtea.dart';
+import 'package:libac_dart/utils/Hashing.dart';
+import 'package:test/expect.dart';
+import 'package:test/scaffolding.dart';
+
+void main() {
+  test("Test XTEA Encryption", () async {
+    String knownEncryptedValue =
+        "MU1T+AuHyBmALhbMOgZJQa5A"; // "Hello World!" // Test Key
+    String keyHash = "131515d94e2574cd680ab1a41ecdc34c";
+    List<int> knownKey = [320148953, 1311077581, 1745531300, 516801356];
+
+    XTEA tea = await XTEA("Test Key");
+    expect(-1, tea.testKey(knownKey));
+
+    String newValue = tea.encryptString("Hello World!");
+
+    expect(Hashing.llMD5String("Test Key", 0), keyHash);
+    expect(newValue, knownEncryptedValue);
+    expect(tea.decryptString(newValue), "Hello World!");
+  });
+
+  test("Test AES Implementation", () async {
+    File key = File("test/aesKey.bin");
+    File enc = File("test/HelloWorld.enc");
+    File hw = File("test/HelloWorld.txt");
+    String helloWorld = "Hello World!";
+
+    hw.writeAsStringSync(helloWorld);
+
+    AESCipher aes = await AESCipher.generate();
+    AESData encryptedNew = await aes.encrypt(utf8.encode(helloWorld));
+
+    enc.writeAsBytes(encryptedNew.data);
+    key.writeAsBytes(aes.getKey());
+
+    expect(helloWorld, utf8.decode(await aes.decrypt(encryptedNew)));
+  });
+}