Add UPX checking

BurnOutSharp/FileType/Executable.cs

@@ -228,6 +228,11 @@ namespace BurnOutSharp.FileType
             if (!string.IsNullOrWhiteSpace(protection))
                 protections.Add(protection);
 
+            // UPX
+            protection = UPX.CheckContents(fileContent, includePosition);
+            if (!string.IsNullOrWhiteSpace(protection))
+                protections.Add(protection);
+
             // VOB ProtectCD/DVD
             protection = VOBProtectCDDVD.CheckContents(file, fileContent, includePosition);
             if (!string.IsNullOrWhiteSpace(protection))

BurnOutSharp/ProtectionType/UPX.cs

@@ -0,0 +1,33 @@
+using System.Text;
+
+namespace BurnOutSharp.ProtectionType
+{
+    public class UPX
+    {
+        public static string CheckContents(byte[] fileContent, bool includePosition = false)
+        {
+            // UPX!
+            byte[] check = new byte[] { 0x55, 0x50, 0x58, 0x21 };
+            if (fileContent.Contains(check, out int position))
+            {
+                string version = GetVersion(fileContent, position);
+                return $"UPX {version}" + (includePosition ? $" (Index {position})" : string.Empty);
+            }
+
+            return null;
+        }
+
+        private static string GetVersion(byte[] fileContent, int index)
+        {
+            try
+            {
+                index -= 5;
+                return Encoding.ASCII.GetString(fileContent, index, 4);
+            }
+            catch
+            {
+                return "(Unknown Version)";
+            }
+        }
+    }
+}

README.md

@@ -74,6 +74,7 @@ Below is a list of the protections that can be detected using this code:
 - TAGES (mostly complete)
 - TZCopyProtector
 - Uplay (partial)
+- UPX
 - VOB ProtectCD/DVD
 - Winlock
 - WISE Installer