1 using System;
 2 using System.Text;
 3 using System.IO;
 4
 5 namespace MyEncryptionDll
 6 {
 7     public class EncryptionDll
 8     {
 9         public static void EncryptionFunc(string stagingAreaData)
10         {
11             try
12             {
13                 string _path = stagingAreaData + "/assets/bin/Data/Managed/Assembly-CSharp.dll";
14                 FileStream _assemblyReadStream = new FileStream(_path, FileMode.Open, FileAccess.Read);
15                 BinaryReader _assemblyBinaryReader = new BinaryReader(_assemblyReadStream);
16                 byte[] _byteData = _assemblyBinaryReader.ReadBytes((int)_assemblyReadStream.Length);
17
18                 _assemblyBinaryReader.Close();
19                 _assemblyReadStream.Close();
20
21                 if (_byteData.Length > 0)
22                 {
23                     // 更改第一个字节信息，破坏程序集结构
24                     _byteData[0] += 1;
25
26                     FileStream _assemblyWriteStream = new FileStream(_path, FileMode.Create, FileAccess.Write);
27                     BinaryWriter _assemblyBinaryWriter = new BinaryWriter(_assemblyWriteStream);
28                     _assemblyBinaryWriter.Write(_byteData);
29
30                     _assemblyBinaryWriter.Flush();
31                     _assemblyWriteStream.Flush();
32
33                     _assemblyBinaryWriter.Close();
34                     _assemblyWriteStream.Close();
35                 }
36                 else
37                 {
38                     //throw new System.Exception("读取不到数据！");
39                 }
40             }
41             catch (System.Exception ex)
42             {
43                 FileStream _logStream = new FileStream("C://log.txt", FileMode.Create, FileAccess.Write);
44                 StreamWriter _sw = new StreamWriter(_logStream);
45                 _sw.Write(ex.Message);
46                 _sw.Flush();
47                 _logStream.Flush();
48
49                 _sw.Close();
50                 _logStream.Close();
51             }
52             finally
53             {
54             }
55
56         }
57     }
58 }