fix table and rc4; fix exception when shutdown; log to file

shadowsocks-csharp/Encryptor.cs

@@ -228,6 +228,17 @@ namespace shadowsocks_csharp
             }
         }
 
+        public byte[] byteArrayWith(byte[] buf, int length)
+        {
+            if (buf.Length == length)
+            {
+                return buf;
+            }
+            byte[] result = new byte[length];
+            System.Buffer.BlockCopy(buf, 0, result, 0, length);
+            return result;
+        }
+
         public byte[] Encrypt(byte[] buf, int length)
         {
             switch (method)
@@ -235,11 +246,11 @@ namespace shadowsocks_csharp
                 case "table":
                     for (int i = 0; i < length; i++)
                         buf[i] = encryptTable[buf[i]];
-                    return buf;
+                    return byteArrayWith(buf, length);
                     break;
                 case "rc4":
                     rc4.Encrypt(encryptTable, buf, length);
-                    return buf;
+                    return byteArrayWith(buf, length);
                     break;
                 default:
                     return sslEncrypt(buf, length);
@@ -252,11 +263,11 @@ namespace shadowsocks_csharp
                 case "table":
                     for (int i = 0; i < length; i++)
                         buf[i] = decryptTable[buf[i]];
-                    return buf;
+                    return byteArrayWith(buf, length);
                     break;
                 case "rc4":
                     rc4.Decrypt(decryptTable, buf, length);
-                    return buf;
+                    return byteArrayWith(buf, length);
                     break;
                 default:
                     return sslDecrypt(buf, length);

shadowsocks-csharp/Local.cs

@@ -131,7 +131,14 @@ namespace shadowsocks_csharp
             connection.Shutdown(SocketShutdown.Send);
             if (remote != null)
             {
-                remote.Shutdown(SocketShutdown.Send);
+                try
+                {
+                    remote.Shutdown(SocketShutdown.Send);
+                }
+                catch (SocketException e)
+                {
+                    Console.WriteLine(e.ToString());
+                }
             }
             encryptor.Dispose();
         }

shadowsocks-csharp/Program.cs

@@ -1,5 +1,6 @@
 using System;
 using System.Collections.Generic;
+using System.IO;
 using System.Windows.Forms;
 
 namespace shadowsocks_csharp
@@ -12,9 +13,25 @@ namespace shadowsocks_csharp
         [STAThread]
         static void Main()
         {
+            try
+            {                
+                FileStream fs = new FileStream("shadowsocks.log", FileMode.Append);
+                TextWriter tmp = Console.Out;
+                StreamWriter sw = new StreamWriter(fs);
+                sw.AutoFlush = true;
+                Console.SetOut(sw);
+                Console.SetError(sw);
+
+            }
+            catch (IOException e)
+            {
+                Console.WriteLine(e.ToString());
+            }
             Application.EnableVisualStyles();
             Application.SetCompatibleTextRenderingDefault(false);
             Application.Run(new Form1());
+
+
         }
     }
 }