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freez / WeChatImageDataEncryptionC#MIT

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PC微信图片加密 加密 spread retract

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Program.cs 10.98 KB
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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.IO;
namespace WeChatImageDatEncryption
{
class Program
{
//JPEG (jpg),文件头:FFD8FFE1
//PNG (png),文件头:89504E47
static List<FileHeadInfo> ImageFileHeads = new List<FileHeadInfo>() {
new FileHeadInfo(){
FileHeadByte=0xff,
CheckBytes=new byte[]{ 0xff,0xd8},
Remarks="JPEG (jpg),文件头:FFD8FFE1",
Suffix=".jpg",
Key=-1
},
new FileHeadInfo(){
FileHeadByte=0x89,
CheckBytes=new byte[]{ 0x89, 0x50},
Remarks="PNG (png),文件头:89504E47",
Suffix=".png",
Key=-1,
},
};
static Dictionary<int, FileHeadInfo> LocalFileMap = new Dictionary<int, FileHeadInfo>();
static void Main(string[] args)
{
Console.ForegroundColor = ConsoleColor.White;
while (true)
{
try
{
Console.Write("请选择操作(1:解密:2:加密,3:获取加密Key):");
string opType = Console.ReadLine();
switch (opType)
{
case "1":
Decrypt();
break;
case "2":
Encryption();
break;
case "3":
GetKey();
break;
default:
throw new Exception("未知操作类型");
}
}
catch (Exception ex)
{
WriteLine(ex.Message, ConsoleColor.Red);
}
}
}
/// <summary>
/// 解密
/// </summary>
/// <param name="dirPath"></param>
static void DEFile(string dirPath)
{
string[] filePaths = Directory.GetFiles(dirPath, "*.dat");
if (filePaths == null || filePaths.Length == 0)
{
throw new Exception("该目录下不存在dat文件");
}
byte[] orfile = null;
byte[] enbyte = null;
string enDir = AppDomain.CurrentDomain.BaseDirectory + "/DecryptData";
if (!Directory.Exists(enDir))
{
Directory.CreateDirectory(enDir);
}
FileHeadInfo key = null;
foreach (string item in filePaths)
{
try
{
orfile = File.ReadAllBytes(item);
if (isEncryption(orfile))
{
key = GetKey(item);
if (key == null)
{
Console.ForegroundColor = ConsoleColor.Red;
WriteLine($"{item},解密失败", ConsoleColor.Red);
Console.ForegroundColor = ConsoleColor.White;
continue;
}
enbyte = EncryptionUtil.EnDeFile(orfile, key.Key);
File.WriteAllBytes(enDir + "/" + new FileInfo(item).Name.Replace(".dat", key.Suffix), enbyte);
}
else
{
File.WriteAllBytes(enDir + "/" + new FileInfo(item).Name.Replace(".dat", ".jpg"), orfile);
}
WriteLine(string.Format("{0}处理完成...", item), ConsoleColor.Green);
}
catch (Exception ex)
{
Console.WriteLine(string.Format("【{0}】文件处理异常,{1}", item, ex.Message));
}
}
PrintKeyInfo();
WriteLine("所有文件已处理完成", ConsoleColor.Green);
}
/// <summary>
/// 是否加密
/// </summary>
/// <param name="buffer"></param>
/// <returns></returns>
static bool isEncryption(byte[] buffer)
{
foreach (var item in ImageFileHeads)
{
if (buffer[0] == item.CheckBytes[0] && buffer[1] == item.CheckBytes[1])
{
return false;
}
}
return true;
}
/// <summary>
/// 校验路径
/// </summary>
/// <returns></returns>
static void CheckDirPath(string dirPath)
{
if (!Directory.Exists(dirPath))
{
throw new Exception("不存在此目录!");
}
}
/// <summary>
/// 校验路径
/// </summary>
/// <returns></returns>
static void CheckFilePath(string filePath)
{
if (!File.Exists(filePath))
{
throw new Exception("不存在此文件!");
}
}
/// <summary>
/// 获取key
/// </summary>
/// <returns></returns>
static FileHeadInfo GetKey(string filePath)
{
if (!File.Exists(filePath))
{
throw new Exception("不存在此文件:" + filePath);
}
byte[] fileBuffer = File.ReadAllBytes(filePath);
if (LocalFileMap.ContainsKey(fileBuffer[0]))
{
return LocalFileMap[fileBuffer[0]];
}
FileHeadInfo key = null;
foreach (var item in ImageFileHeads)
{
int tempKey = fileBuffer[0] ^ item.FileHeadByte;
byte[] enbyte = EncryptionUtil.EnDeFile(fileBuffer, tempKey);
if (enbyte[0] == item.CheckBytes[0] && enbyte[1] == item.CheckBytes[1])
{
key = item.Clone();
key.Key = tempKey;
LocalFileMap.Add(fileBuffer[0], key);
break;
}
}
return key;
}
/// <summary>
/// 解密
/// </summary>
static void Decrypt()
{
DEFile(GetInPutDirPath());
}
/// <summary>
/// 加密
/// </summary>
static void Encryption()
{
Console.Write("请输入加密Key:");
string keyStr = Console.ReadLine();
if (string.IsNullOrEmpty(keyStr))
{
throw new Exception("请输入加密Key!");
}
int key;
if (!int.TryParse(keyStr, out key))
{
throw new Exception("无效的加密Key!");
}
Encryption(GetInPutDirPath(), key);
}
/// <summary>
/// 加密
/// </summary>
/// <param name="dirPath"></param>
/// <param name="key"></param>
static void Encryption(string dirPath, int key)
{
string[] filePaths = Directory.GetFiles(dirPath);
if (filePaths == null || filePaths.Length == 0)
{
throw new Exception("该目录下不存在任何文件");
}
byte[] orfile = null;
byte[] enbyte = null;
string enDir = AppDomain.CurrentDomain.BaseDirectory + "/EncryptionData";
if (!Directory.Exists(enDir))
{
Directory.CreateDirectory(enDir);
}
foreach (string item in filePaths)
{
try
{
orfile = File.ReadAllBytes(item);
enbyte = EncryptionUtil.EnDeFile(orfile, key);
FileInfo fileInfo = new FileInfo(item);
File.WriteAllBytes(enDir + "/" + fileInfo.Name.Replace(fileInfo.Extension, ".dat"), enbyte);
WriteLine(string.Format("{0}处理完成...", item), ConsoleColor.Green);
}
catch (Exception ex)
{
WriteLine(string.Format("【{0}】文件处理异常,{1}", item, ex.Message), ConsoleColor.Red);
}
}
WriteLine("所有文件已处理完成", ConsoleColor.Green);
}
/// <summary>
/// 获取加密Key
/// </summary>
static void GetKey()
{
string filePath = GetInPutFilePath();
FileHeadInfo key = GetKey(filePath);
if (key == null)
{
WriteLine($"{filePath},获取key失败,非png或jpg文件", ConsoleColor.Red);
}
WriteLine($"{filePath},{key.Remarks},加密Key:{key.Key}", ConsoleColor.Yellow);
}
/// <summary>
/// 获取输入的文件目录
/// </summary>
/// <returns></returns>
static string GetInPutDirPath()
{
Console.Write("请输入文件目录:");
string dirPath = Console.ReadLine();
if (string.IsNullOrEmpty(dirPath))
{
throw new Exception("请输入文件目录!");
}
CheckDirPath(dirPath);
return dirPath;
}
/// <summary>
/// 获取输入的文件路径
/// </summary>
/// <returns></returns>
static string GetInPutFilePath()
{
Console.Write("请输入文件路径:");
string filePath = Console.ReadLine();
if (string.IsNullOrEmpty(filePath))
{
throw new Exception("请输入文件路径!");
}
CheckFilePath(filePath);
return filePath;
}
static void WriteLine(string msg, ConsoleColor color, ConsoleColor defaultColor = ConsoleColor.White)
{
Console.ForegroundColor = color;
Console.WriteLine(msg);
Console.ForegroundColor = defaultColor;
}
static void PrintKeyInfo()
{
if (LocalFileMap != null && LocalFileMap.Count > 0)
{
WriteLine($"本机加密Key:{LocalFileMap.FirstOrDefault().Value.Key}", ConsoleColor.Yellow);
}
}
}
class FileHeadInfo
{
/// <summary>
/// 文件第一个字节
/// </summary>
public int FileHeadByte { get; set; }
/// <summary>
/// 用于校验解密后文件的2个字节
/// </summary>
public byte[] CheckBytes { get; set; }
/// <summary>
/// 文件后缀
/// </summary>
public string Suffix { get; set; }
/// <summary>
/// 备注
/// </summary>
public string Remarks { get; set; }
/// <summary>
/// 本机加密key
/// </summary>
public int Key { get; set; }
public FileHeadInfo Clone()
{
return (FileHeadInfo)this.MemberwiseClone();
}
}
}

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https://gitee.com/freeys/WeChatImageDataEncryption.git
git@gitee.com:freeys/WeChatImageDataEncryption.git
freeys
WeChatImageDataEncryption
WeChatImageDataEncryption
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