mcs/class/Mono.PEToolkit/DOSHeader.cs

   1
   2 //
   3 // Permission is hereby granted, free of charge, to any person obtaining
   4 // a copy of this software and associated documentation files (the
   5 // "Software"), to deal in the Software without restriction, including
   6 // without limitation the rights to use, copy, modify, merge, publish,
   7 // distribute, sublicense, and/or sell copies of the Software, and to
   8 // permit persons to whom the Software is furnished to do so, subject to
   9 // the following conditions:
  10 //
  11 // The above copyright notice and this permission notice shall be
  12 // included in all copies or substantial portions of the Software.
  13 //
  14 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  15 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  16 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  17 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  18 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  19 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  20 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  21 //
  22 /*\r
  23  * Copyright (c) 2002 Sergey Chaban <serge@wildwestsoftware.com>\r
  24  */\r
  25 \r
  26 using System;\r
  27 using System.IO;\r
  28 using System.Runtime.InteropServices;\r
  29 \r
  30 namespace Mono.PEToolkit {\r
  31 \r
  32         public class DOSHeader {\r
  33                 \r
  34                 private readonly int OpenSize = 60;\r
  35                 private readonly int CloseSize = 64;\r
  36 \r
  37                 private byte[] open_data;       // First 60 bytes of data\r
  38                 private byte[] close_data;      // Last 64 bytes of data\r
  39 \r
  40                 // File address of new exe header.\r
  41                 private uint lfanew;\r
  42 \r
  43                 public DOSHeader ()\r
  44                 {\r
  45                         Init ();\r
  46                 }\r
  47 \r
  48                 public DOSHeader (BinaryReader reader)\r
  49                 {\r
  50                         Read (reader);\r
  51                 }\r
  52 \r
  53                 public uint Lfanew {\r
  54                         get { return lfanew; }\r
  55                 }\r
  56 \r
  57                 public void Read (BinaryReader reader)\r
  58                 {\r
  59                         open_data = reader.ReadBytes (OpenSize);\r
  60                         lfanew = reader.ReadUInt32 ();\r
  61                         close_data = reader.ReadBytes (CloseSize);\r
  62                 }\r
  63 \r
  64                 public void Write (BinaryWriter writer)\r
  65                 {\r
  66                         writer.Write (open_data);\r
  67                         writer.Write (lfanew);\r
  68                         writer.Write (close_data);\r
  69                 }\r
  70 \r
  71                 public void Init ()\r
  72                 {\r
  73                         open_data = new byte[] { 0x4D, 0x5A, 0x0, 0x0, 0xE7, 0x0, 0x0, 0x0, \r
  74                                                  0x4, 0x0, 0x0, 0x0, 0xFF, 0xFF, 0x0, 0x0, \r
  75                                                  0xB8, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, \r
  76                                                  0x40, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, \r
  77                                                  0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, \r
  78                                                  0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, \r
  79                                                  0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, \r
  80                                                  0x0, 0x0, 0x0, 0x0 };\r
  81                         \r
  82                         close_data = new byte[] { 0xE, 0x1F, 0xBA, 0xE, 0x0, 0xB4, 0x9, 0xCD, \r
  83                                                   0x21, 0xB8, 0x1, 0x4C, 0xCD, 0x21,0x54, 0x68, \r
  84                                                   0x69, 0x73, 0x20, 0x70, 0x72, 0x6F, 0x67, 0x72, \r
  85                                                   0x61, 0x6D, 0x20, 0x63, 0x61, 0x6E, 0x6E, 0x6F, \r
  86                                                   0x74, 0x20, 0x62, 0x65, 0x20, 0x72, 0x75, 0x6E, \r
  87                                                   0x20, 0x69, 0x6E, 0x20, 0x44, 0x4F, 0x53, 0x20, \r
  88                                                   0x6D, 0x6F, 0x64, 0x65, 0x2E, 0xD, 0xD, 0xA, \r
  89                                                   0x24, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0 };\r
  90 \r
  91                 }\r
  92 \r
  93                 /// <summary>\r
  94                 /// </summary>\r
  95                 /// <param name="writer"></param>\r
  96                 public void Dump(TextWriter writer)\r
  97                 {\r
  98                         writer.WriteLine(\r
  99                                 "New header offset   : {0}",\r
 100                                 lfanew + " (0x" + lfanew.ToString("X") + ")"\r
 101                         );\r
 102                 }\r
 103 \r
 104                 /// <summary>\r
 105                 /// </summary>\r
 106                 /// <returns></returns>\r
 107                 public override string ToString()\r
 108                 {\r
 109                         StringWriter sw = new StringWriter();\r
 110                         Dump(sw);\r
 111                         return sw.ToString();\r
 112                 }\r
 113 \r
 114         }\r
 115 \r
 116 }\r
 117 \r