mcs/class/Mono.PEToolkit/DOSHeader.cs

   1 /*\r
   2  * Copyright (c) 2002 Sergey Chaban <serge@wildwestsoftware.com>\r
   3  */\r
   4 \r
   5 using System;\r
   6 using System.IO;\r
   7 using System.Runtime.InteropServices;\r
   8 \r
   9 namespace Mono.PEToolkit {\r
  10 \r
  11         public class DOSHeader {\r
  12                 \r
  13                 private readonly int OpenSize = 60;\r
  14                 private readonly int CloseSize = 64;\r
  15 \r
  16                 private byte[] open_data;       // First 60 bytes of data\r
  17                 private byte[] close_data;      // Last 64 bytes of data\r
  18 \r
  19                 // File address of new exe header.\r
  20                 private uint lfanew;\r
  21 \r
  22                 public DOSHeader ()\r
  23                 {\r
  24                         Init ();\r
  25                 }\r
  26 \r
  27                 public DOSHeader (BinaryReader reader)\r
  28                 {\r
  29                         Read (reader);\r
  30                 }\r
  31 \r
  32                 public uint Lfanew {\r
  33                         get { return lfanew; }\r
  34                 }\r
  35 \r
  36                 public void Read (BinaryReader reader)\r
  37                 {\r
  38                         open_data = reader.ReadBytes (OpenSize);\r
  39                         lfanew = reader.ReadUInt32 ();\r
  40                         close_data = reader.ReadBytes (CloseSize);\r
  41                 }\r
  42 \r
  43                 public void Write (BinaryWriter writer)\r
  44                 {\r
  45                         writer.Write (open_data);\r
  46                         writer.Write (lfanew);\r
  47                         writer.Write (close_data);\r
  48                 }\r
  49 \r
  50                 public void Init ()\r
  51                 {\r
  52                         open_data = new byte[] { 0x4D, 0x5A, 0x0, 0x0, 0xE7, 0x0, 0x0, 0x0, \r
  53                                                  0x4, 0x0, 0x0, 0x0, 0xFF, 0xFF, 0x0, 0x0, \r
  54                                                  0xB8, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, \r
  55                                                  0x40, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, \r
  56                                                  0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, \r
  57                                                  0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, \r
  58                                                  0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, \r
  59                                                  0x0, 0x0, 0x0, 0x0 };\r
  60                         \r
  61                         close_data = new byte[] { 0xE, 0x1F, 0xBA, 0xE, 0x0, 0xB4, 0x9, 0xCD, \r
  62                                                   0x21, 0xB8, 0x1, 0x4C, 0xCD, 0x21,0x54, 0x68, \r
  63                                                   0x69, 0x73, 0x20, 0x70, 0x72, 0x6F, 0x67, 0x72, \r
  64                                                   0x61, 0x6D, 0x20, 0x63, 0x61, 0x6E, 0x6E, 0x6F, \r
  65                                                   0x74, 0x20, 0x62, 0x65, 0x20, 0x72, 0x75, 0x6E, \r
  66                                                   0x20, 0x69, 0x6E, 0x20, 0x44, 0x4F, 0x53, 0x20, \r
  67                                                   0x6D, 0x6F, 0x64, 0x65, 0x2E, 0xD, 0xD, 0xA, \r
  68                                                   0x24, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0 };\r
  69 \r
  70                 }\r
  71 \r
  72                 /// <summary>\r
  73                 /// </summary>\r
  74                 /// <param name="writer"></param>\r
  75                 public void Dump(TextWriter writer)\r
  76                 {\r
  77                         writer.WriteLine(\r
  78                                 "New header offset   : {0}",\r
  79                                 lfanew + " (0x" + lfanew.ToString("X") + ")"\r
  80                         );\r
  81                 }\r
  82 \r
  83                 /// <summary>\r
  84                 /// </summary>\r
  85                 /// <returns></returns>\r
  86                 public override string ToString()\r
  87                 {\r
  88                         StringWriter sw = new StringWriter();\r
  89                         Dump(sw);\r
  90                         return sw.ToString();\r
  91                 }\r
  92 \r
  93         }\r
  94 \r
  95 }\r
  96 \r