From 6943197a84a10b19a9c17b8cf75c069d14959b74 Mon Sep 17 00:00:00 2001
From: Artem Guzhva <21160542+hexcat@users.noreply.github.com>
Date: Mon, 16 Sep 2024 11:47:05 +0000
Subject: [PATCH] Set decryptionKey for legacy AES/3DES encryption

---
 ysoserial/Plugins/ViewStatePlugin.cs | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/ysoserial/Plugins/ViewStatePlugin.cs b/ysoserial/Plugins/ViewStatePlugin.cs
index 62a9e87..80833ca 100644
--- a/ysoserial/Plugins/ViewStatePlugin.cs
+++ b/ysoserial/Plugins/ViewStatePlugin.cs
@@ -230,11 +230,14 @@ public object Run(string[] args)
             var readOnlyField = typeof(ConfigurationElement).GetField("_bReadOnly", BindingFlags.Instance | BindingFlags.NonPublic);
             readOnlyField.SetValue(config, false);
             // we don't really need the encryption/decyption keys to create a valid legacy viewstate but this is used when isEncrypted=true
-            if (!String.IsNullOrEmpty(decryptionKey) && (!isLegacy || (isLegacy && isEncrypted)))
+            if (!String.IsNullOrEmpty(decryptionKey))
             {
                 if (isDebug)
                 {
-                    Console.WriteLine("Encryption is on!");
+                    if (!isLegacy || (isLegacy && isEncrypted))
+                        Console.WriteLine("Encryption is on!");
+                    else if (validationAlg.ToUpper().Equals("3DES") || validationAlg.ToUpper().Equals("AES"))
+                        Console.WriteLine("Legacy AES/3DES encryption is on!");
                 }
                 config.Decryption = decryptionAlg;
                 config.DecryptionKey = decryptionKey;