fix crash

Author: Stricted

SPHDecode/Implementations/Cryptography.cs

@@ -28,7 +28,7 @@ public static byte[] Decrypt(byte[] clearText)
                 return null;
             }
 
-            if (util.IsValidXML(Encoding.UTF8.GetString(response)).Equals(false))
+            if (util.IsValidXML(response).Equals(false))
             {
                 MessageBox.Show("Not a valid config file...", "Confirmation", MessageBoxButton.OK, MessageBoxImage.Error);
                 return null;
@@ -41,7 +41,7 @@ public static byte[] Encrypt(byte[] data)
         {
             byte[] response = null;
 
-            if (util.IsValidXML(Encoding.UTF8.GetString(data)).Equals(false))
+            if (util.IsValidXML((data)).Equals(false))
             {
                 MessageBox.Show("Not a valid config file...", "Confirmation", MessageBoxButton.OK, MessageBoxImage.Error);
                 return null;

SPHDecode/Implementations/util.cs

@@ -1,20 +1,28 @@
 using System;
+using System.Text;
 using System.Xml;
 
 namespace SPHDecode.Implementations
 {
     class util
     {
-        public static bool IsValidXML(string value)
+        public static bool IsValidXML(byte[] data)
         {
-            if (string.IsNullOrWhiteSpace(value))
+            if (Object.Equals(data, null))
+            {
                 return false;
-
-            if (value.EndsWith("\0"))
-                value = value.Substring(0, value.Length - 1);
+            }
 
             try
             {
+                string value = Encoding.UTF8.GetString(data);
+
+                if (string.IsNullOrWhiteSpace(value))
+                    return false;
+
+                if (value.EndsWith("\0"))
+                    value = value.Substring(0, value.Length - 1);
+
                 XmlDocument xmlDoc = new XmlDocument();
 
                 xmlDoc.LoadXml(value);
@@ -30,7 +38,8 @@ public static bool IsValidXML(string value)
 
         public static byte[] removeNullByte (byte[] data)
         {
-            if (data[data.Length - 1].Equals(0))
+            
+            if (Object.Equals(data, null).Equals(false) && data[data.Length - 1].Equals(0))
             {
                 byte[] tmp = new byte[data.Length - 1];
                 Array.Copy(data, tmp, data.Length - 1);
@@ -43,7 +52,7 @@ public static byte[] removeNullByte (byte[] data)
 
         public static byte[] addNullByte (byte[] data)
         {
-            if (data[data.Length - 1].Equals(0).Equals(false))
+            if (Object.Equals(data, null).Equals(false) && data[data.Length - 1].Equals(0).Equals(false))
             {
                 byte[] tmp = data;
                 Array.Resize(ref tmp, tmp.Length + 1);