rework autoupdate to script only

zoom fix

Azaion.Common/Security.cs

@@ -0,0 +1,59 @@
+using System.Security.Cryptography;
+using System.Text;
+using Newtonsoft.Json;
+
+namespace Azaion.Common;
+
+public class Security
+{
+    private static string GenDefaultKey()
+    {
+        var date = DateTime.UtcNow;
+        return $"sAzaion_default_dfvkjhg_{date:yyyy}-{date:MM}_{date:dd}_{date:HH}_key";
+    }
+    
+    public static string Encrypt<T>(T model, string? key = null) where T : class
+    {
+        var json = JsonConvert.SerializeObject(model);
+        var inputBytes = Encoding.UTF8.GetBytes(json);
+        
+        var keyBytes = SHA256.HashData(Encoding.UTF8.GetBytes(key ?? GenDefaultKey()));
+        var iv = RandomNumberGenerator.GetBytes(16);
+
+        using var aes = Aes.Create();
+        aes.Key = keyBytes;
+        aes.IV = iv;
+        aes.Mode = CipherMode.CFB;
+        aes.Padding = PaddingMode.ISO10126;
+        
+        using var encryptor = aes.CreateEncryptor();
+        var ciphertext = encryptor.TransformFinalBlock(inputBytes, 0, inputBytes.Length);
+        
+        var result = new byte[iv.Length + ciphertext.Length];
+        iv.CopyTo(result, 0);
+        ciphertext.CopyTo(result, iv.Length);
+
+        return Convert.ToBase64String(result);
+    }
+    
+    public static T Decrypt<T>(string encryptedData, string? key = null) where T : class
+    {
+        var ciphertextWithIv = Convert.FromBase64String(encryptedData);
+        var keyBytes = SHA256.HashData(Encoding.UTF8.GetBytes(key ?? GenDefaultKey()));
+        
+        var iv = ciphertextWithIv[..16];
+        var ciphertext = ciphertextWithIv[16..];
+        
+        using var aes = Aes.Create();
+        aes.Key = keyBytes;
+        aes.IV = iv;
+        aes.Mode = CipherMode.CFB;
+        aes.Padding = PaddingMode.ISO10126;
+        
+        using var decryptor = aes.CreateDecryptor();
+        var plaintext = decryptor.TransformFinalBlock(ciphertext, 0, ciphertext.Length);
+
+        var json = Encoding.UTF8.GetString(plaintext);
+        return JsonConvert.DeserializeObject<T>(json)!;
+    }
+}