Make migration from old save to new save work

Assets/Scripts/BazookaManager.cs

@@ -25,6 +25,21 @@ public class BazookaManager : MonoBehaviour
             DontDestroyOnLoad(gameObject);
             if (!firstLoadDone)
             {
+                try
+                {
+                    var oldSave = Path.Join(Application.persistentDataPath, OldSavefileEncryption.BAZOOKA_MANAGER_FILE_KEY + ".dat");
+                    var newSave = Path.Join(Application.persistentDataPath, "savefile.json");
+                    if (
+                        File.Exists(oldSave) ||
+                        !File.Exists(newSave)
+                    )
+                    {
+                        File.WriteAllBytes(newSave, Encoding.UTF8.GetBytes(OldSavefileEncryption.DecryptRaw(File.ReadAllBytes(oldSave))));
+                        File.Delete(oldSave);
+                    }
+                }
+                catch { }
+
                 firstLoadDone = true;
                 var save = LoadObject("savefile");
                 var cache = LoadArray("cache");

Assets/Scripts/OldSavefileEncryption.cs

@@ -9,39 +9,7 @@ public class OldSavefileEncryption
     public const string BAZOOKA_MANAGER_KEY = "5de0d5798d4eb751e13b668c1fc5297d";
     public const string BAZOOKA_MANAGER_FILE_KEY = "e74af7ba21b8b4edd0e3f1d572d63c67";
 
-    public static byte[] EncryptRaw(string text, string key)
+    public static string DecryptRaw(byte[] data)
-    {
-        if (BAZOOKA_MANAGER_KEY.Trim() == string.Empty)
-        {
-            Debug.LogError("Failed to encrypt: Encryption/Decryption keys not present");
-            return null;
-        }
-        try
-        {
-            using Aes aes = Aes.Create();
-            aes.Key = Encoding.UTF8.GetBytes(key);
-            aes.Mode = CipherMode.CBC;
-            aes.Padding = PaddingMode.PKCS7;
-            aes.GenerateIV();
-
-            using MemoryStream ms = new();
-            ms.Write(aes.IV, 0, aes.IV.Length);
-
-            using (var cryptoStream = new CryptoStream(ms, aes.CreateEncryptor(), CryptoStreamMode.Write))
-            using (var writer = new StreamWriter(cryptoStream))
-            {
-                writer.Write(text);
-            }
-
-            return ms.ToArray();
-        }
-        catch
-        {
-            return null;
-        }
-    }
-
-    public static string DecryptRaw(byte[] data, string key)
     {
         if (BAZOOKA_MANAGER_KEY.Trim() == string.Empty)
         {
@@ -51,7 +19,7 @@ public class OldSavefileEncryption
         try
         {
             using Aes aes = Aes.Create();
-            aes.Key = Encoding.UTF8.GetBytes(key);
+            aes.Key = Encoding.UTF8.GetBytes(BAZOOKA_MANAGER_KEY);
             aes.Mode = CipherMode.CBC;
             aes.Padding = PaddingMode.PKCS7;