Contrib: Added client patcher, original author @Fabi

contrib/Connection Patcher/Helper.cs

@@ -0,0 +1,76 @@
+/*
+ * Copyright (C) 2012-2014 Arctium Emulation <http://arctium.org>
+ * Copyright (C) 2008-2014 TrinityCore <http://www.trinitycore.org/>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+using Connection_Patcher.Constants;
+using System;
+using System.IO;
+using System.Security.Cryptography;
+
+namespace Connection_Patcher
+{
+    class Helper
+    {
+        public static BinaryTypes GetBinaryType(byte[] data)
+        {
+            BinaryTypes type = 0u;
+
+            using (var reader = new BinaryReader(new MemoryStream(data)))
+            {
+                var magic = (uint)reader.ReadUInt16();
+
+                // Check MS-DOS magic
+                if (magic == 0x5A4D)
+                {
+                    reader.BaseStream.Seek(0x3C, SeekOrigin.Begin);
+
+                    // Read PE start offset
+                    var peOffset = reader.ReadUInt32();
+
+                    reader.BaseStream.Seek(peOffset, SeekOrigin.Begin);
+
+                    var peMagic = reader.ReadUInt32();
+
+                    // Check PE magic
+                    if (peMagic != 0x4550)
+                        throw new NotSupportedException("Not a PE file!");
+
+                    type = (BinaryTypes)reader.ReadUInt16();
+                }
+                else
+                {
+                    reader.BaseStream.Seek(0, SeekOrigin.Begin);
+
+                    type = (BinaryTypes)reader.ReadUInt32();
+                }
+            }
+
+            return type;
+        }
+
+        public static string GetFileChecksum(byte[] data)
+        {
+            using (var stream = new BufferedStream(new MemoryStream(data), 1200000))
+            {
+                var sha256 = new SHA256Managed();
+                var checksum = sha256.ComputeHash(stream);
+
+                return BitConverter.ToString(checksum).Replace("-", "").ToLower();
+            }
+        }
+    }
+}