添加项目文件。

.gitattributes

@@ -0,0 +1,63 @@
+###############################################################################
+# Set default behavior to automatically normalize line endings.
+###############################################################################
+* text=auto
+
+###############################################################################
+# Set default behavior for command prompt diff.
+#
+# This is need for earlier builds of msysgit that does not have it on by
+# default for csharp files.
+# Note: This is only used by command line
+###############################################################################
+#*.cs     diff=csharp
+
+###############################################################################
+# Set the merge driver for project and solution files
+#
+# Merging from the command prompt will add diff markers to the files if there
+# are conflicts (Merging from VS is not affected by the settings below, in VS
+# the diff markers are never inserted). Diff markers may cause the following 
+# file extensions to fail to load in VS. An alternative would be to treat
+# these files as binary and thus will always conflict and require user
+# intervention with every merge. To do so, just uncomment the entries below
+###############################################################################
+#*.sln       merge=binary
+#*.csproj    merge=binary
+#*.vbproj    merge=binary
+#*.vcxproj   merge=binary
+#*.vcproj    merge=binary
+#*.dbproj    merge=binary
+#*.fsproj    merge=binary
+#*.lsproj    merge=binary
+#*.wixproj   merge=binary
+#*.modelproj merge=binary
+#*.sqlproj   merge=binary
+#*.wwaproj   merge=binary
+
+###############################################################################
+# behavior for image files
+#
+# image files are treated as binary by default.
+###############################################################################
+#*.jpg   binary
+#*.png   binary
+#*.gif   binary
+
+###############################################################################
+# diff behavior for common document formats
+# 
+# Convert binary document formats to text before diffing them. This feature
+# is only available from the command line. Turn it on by uncommenting the 
+# entries below.
+###############################################################################
+#*.doc   diff=astextplain
+#*.DOC   diff=astextplain
+#*.docx  diff=astextplain
+#*.DOCX  diff=astextplain
+#*.dot   diff=astextplain
+#*.DOT   diff=astextplain
+#*.pdf   diff=astextplain
+#*.PDF   diff=astextplain
+#*.rtf   diff=astextplain
+#*.RTF   diff=astextplain

.gitignore

@@ -0,0 +1,363 @@
+## Ignore Visual Studio temporary files, build results, and
+## files generated by popular Visual Studio add-ons.
+##
+## Get latest from https://github.com/github/gitignore/blob/master/VisualStudio.gitignore
+
+# User-specific files
+*.rsuser
+*.suo
+*.user
+*.userosscache
+*.sln.docstates
+
+# User-specific files (MonoDevelop/Xamarin Studio)
+*.userprefs
+
+# Mono auto generated files
+mono_crash.*
+
+# Build results
+[Dd]ebug/
+[Dd]ebugPublic/
+[Rr]elease/
+[Rr]eleases/
+x64/
+x86/
+[Ww][Ii][Nn]32/
+[Aa][Rr][Mm]/
+[Aa][Rr][Mm]64/
+bld/
+[Bb]in/
+[Oo]bj/
+[Oo]ut/
+[Ll]og/
+[Ll]ogs/
+
+# Visual Studio 2015/2017 cache/options directory
+.vs/
+# Uncomment if you have tasks that create the project's static files in wwwroot
+#wwwroot/
+
+# Visual Studio 2017 auto generated files
+Generated\ Files/
+
+# MSTest test Results
+[Tt]est[Rr]esult*/
+[Bb]uild[Ll]og.*
+
+# NUnit
+*.VisualState.xml
+TestResult.xml
+nunit-*.xml
+
+# Build Results of an ATL Project
+[Dd]ebugPS/
+[Rr]eleasePS/
+dlldata.c
+
+# Benchmark Results
+BenchmarkDotNet.Artifacts/
+
+# .NET Core
+project.lock.json
+project.fragment.lock.json
+artifacts/
+
+# ASP.NET Scaffolding
+ScaffoldingReadMe.txt
+
+# StyleCop
+StyleCopReport.xml
+
+# Files built by Visual Studio
+*_i.c
+*_p.c
+*_h.h
+*.ilk
+*.meta
+*.obj
+*.iobj
+*.pch
+*.pdb
+*.ipdb
+*.pgc
+*.pgd
+*.rsp
+*.sbr
+*.tlb
+*.tli
+*.tlh
+*.tmp
+*.tmp_proj
+*_wpftmp.csproj
+*.log
+*.vspscc
+*.vssscc
+.builds
+*.pidb
+*.svclog
+*.scc
+
+# Chutzpah Test files
+_Chutzpah*
+
+# Visual C++ cache files
+ipch/
+*.aps
+*.ncb
+*.opendb
+*.opensdf
+*.sdf
+*.cachefile
+*.VC.db
+*.VC.VC.opendb
+
+# Visual Studio profiler
+*.psess
+*.vsp
+*.vspx
+*.sap
+
+# Visual Studio Trace Files
+*.e2e
+
+# TFS 2012 Local Workspace
+$tf/
+
+# Guidance Automation Toolkit
+*.gpState
+
+# ReSharper is a .NET coding add-in
+_ReSharper*/
+*.[Rr]e[Ss]harper
+*.DotSettings.user
+
+# TeamCity is a build add-in
+_TeamCity*
+
+# DotCover is a Code Coverage Tool
+*.dotCover
+
+# AxoCover is a Code Coverage Tool
+.axoCover/*
+!.axoCover/settings.json
+
+# Coverlet is a free, cross platform Code Coverage Tool
+coverage*.json
+coverage*.xml
+coverage*.info
+
+# Visual Studio code coverage results
+*.coverage
+*.coveragexml
+
+# NCrunch
+_NCrunch_*
+.*crunch*.local.xml
+nCrunchTemp_*
+
+# MightyMoose
+*.mm.*
+AutoTest.Net/
+
+# Web workbench (sass)
+.sass-cache/
+
+# Installshield output folder
+[Ee]xpress/
+
+# DocProject is a documentation generator add-in
+DocProject/buildhelp/
+DocProject/Help/*.HxT
+DocProject/Help/*.HxC
+DocProject/Help/*.hhc
+DocProject/Help/*.hhk
+DocProject/Help/*.hhp
+DocProject/Help/Html2
+DocProject/Help/html
+
+# Click-Once directory
+publish/
+
+# Publish Web Output
+*.[Pp]ublish.xml
+*.azurePubxml
+# Note: Comment the next line if you want to checkin your web deploy settings,
+# but database connection strings (with potential passwords) will be unencrypted
+*.pubxml
+*.publishproj
+
+# Microsoft Azure Web App publish settings. Comment the next line if you want to
+# checkin your Azure Web App publish settings, but sensitive information contained
+# in these scripts will be unencrypted
+PublishScripts/
+
+# NuGet Packages
+*.nupkg
+# NuGet Symbol Packages
+*.snupkg
+# The packages folder can be ignored because of Package Restore
+**/[Pp]ackages/*
+# except build/, which is used as an MSBuild target.
+!**/[Pp]ackages/build/
+# Uncomment if necessary however generally it will be regenerated when needed
+#!**/[Pp]ackages/repositories.config
+# NuGet v3's project.json files produces more ignorable files
+*.nuget.props
+*.nuget.targets
+
+# Microsoft Azure Build Output
+csx/
+*.build.csdef
+
+# Microsoft Azure Emulator
+ecf/
+rcf/
+
+# Windows Store app package directories and files
+AppPackages/
+BundleArtifacts/
+Package.StoreAssociation.xml
+_pkginfo.txt
+*.appx
+*.appxbundle
+*.appxupload
+
+# Visual Studio cache files
+# files ending in .cache can be ignored
+*.[Cc]ache
+# but keep track of directories ending in .cache
+!?*.[Cc]ache/
+
+# Others
+ClientBin/
+~$*
+*~
+*.dbmdl
+*.dbproj.schemaview
+*.jfm
+*.pfx
+*.publishsettings
+orleans.codegen.cs
+
+# Including strong name files can present a security risk
+# (https://github.com/github/gitignore/pull/2483#issue-259490424)
+#*.snk
+
+# Since there are multiple workflows, uncomment next line to ignore bower_components
+# (https://github.com/github/gitignore/pull/1529#issuecomment-104372622)
+#bower_components/
+
+# RIA/Silverlight projects
+Generated_Code/
+
+# Backup & report files from converting an old project file
+# to a newer Visual Studio version. Backup files are not needed,
+# because we have git ;-)
+_UpgradeReport_Files/
+Backup*/
+UpgradeLog*.XML
+UpgradeLog*.htm
+ServiceFabricBackup/
+*.rptproj.bak
+
+# SQL Server files
+*.mdf
+*.ldf
+*.ndf
+
+# Business Intelligence projects
+*.rdl.data
+*.bim.layout
+*.bim_*.settings
+*.rptproj.rsuser
+*- [Bb]ackup.rdl
+*- [Bb]ackup ([0-9]).rdl
+*- [Bb]ackup ([0-9][0-9]).rdl
+
+# Microsoft Fakes
+FakesAssemblies/
+
+# GhostDoc plugin setting file
+*.GhostDoc.xml
+
+# Node.js Tools for Visual Studio
+.ntvs_analysis.dat
+node_modules/
+
+# Visual Studio 6 build log
+*.plg
+
+# Visual Studio 6 workspace options file
+*.opt
+
+# Visual Studio 6 auto-generated workspace file (contains which files were open etc.)
+*.vbw
+
+# Visual Studio LightSwitch build output
+**/*.HTMLClient/GeneratedArtifacts
+**/*.DesktopClient/GeneratedArtifacts
+**/*.DesktopClient/ModelManifest.xml
+**/*.Server/GeneratedArtifacts
+**/*.Server/ModelManifest.xml
+_Pvt_Extensions
+
+# Paket dependency manager
+.paket/paket.exe
+paket-files/
+
+# FAKE - F# Make
+.fake/
+
+# CodeRush personal settings
+.cr/personal
+
+# Python Tools for Visual Studio (PTVS)
+__pycache__/
+*.pyc
+
+# Cake - Uncomment if you are using it
+# tools/**
+# !tools/packages.config
+
+# Tabs Studio
+*.tss
+
+# Telerik's JustMock configuration file
+*.jmconfig
+
+# BizTalk build output
+*.btp.cs
+*.btm.cs
+*.odx.cs
+*.xsd.cs
+
+# OpenCover UI analysis results
+OpenCover/
+
+# Azure Stream Analytics local run output
+ASALocalRun/
+
+# MSBuild Binary and Structured Log
+*.binlog
+
+# NVidia Nsight GPU debugger configuration file
+*.nvuser
+
+# MFractors (Xamarin productivity tool) working folder
+.mfractor/
+
+# Local History for Visual Studio
+.localhistory/
+
+# BeatPulse healthcheck temp database
+healthchecksdb
+
+# Backup folder for Package Reference Convert tool in Visual Studio 2017
+MigrationBackup/
+
+# Ionide (cross platform F# VS Code tools) working folder
+.ionide/
+
+# Fody - auto-generated XML schema
+FodyWeavers.xsd

App.xaml

@@ -0,0 +1,9 @@
+<Application x:Class="WechatPCMsgBakTool.App"
+             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+             xmlns:local="clr-namespace:WechatPCMsgBakTool"
+             StartupUri="MainWindow.xaml">
+    <Application.Resources>
+         
+    </Application.Resources>
+</Application>

App.xaml.cs

@@ -0,0 +1,17 @@
+using System;
+using System.Collections.Generic;
+using System.Configuration;
+using System.Data;
+using System.Linq;
+using System.Threading.Tasks;
+using System.Windows;
+
+namespace WechatPCMsgBakTool
+{
+    /// <summary>
+    /// Interaction logic for App.xaml
+    /// </summary>
+    public partial class App : Application
+    {
+    }
+}

AssemblyInfo.cs

@@ -0,0 +1,10 @@
+using System.Windows;
+
+[assembly: ThemeInfo(
+    ResourceDictionaryLocation.None, //where theme specific resource dictionaries are located
+                                     //(used if a resource is not found in the page,
+                                     // or application resource dictionaries)
+    ResourceDictionaryLocation.SourceAssembly //where the generic resource dictionary is located
+                                              //(used if a resource is not found in the page,
+                                              // app, or any theme specific resource dictionaries)
+)]

Helpers/DecryptionHelper.cs

@@ -0,0 +1,138 @@
+using System;
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.Linq;
+using System.Security.Cryptography;
+using System.Text;
+using System.Threading.Tasks;
+namespace WechatPCMsgBakTool.Helpers
+{
+    public class DecryptionHelper
+    {
+        const int IV_SIZE = 16;
+        const int HMAC_SHA1_SIZE = 20;
+        const int KEY_SIZE = 32;
+        const int AES_BLOCK_SIZE = 16;
+        const int DEFAULT_ITER = 64000;
+        const int DEFAULT_PAGESIZE = 4096; //4048数据 + 16IV + 20 HMAC + 12
+        const string SQLITE_HEADER = "SQLite format 3";
+        public static byte[]? GetWechatKey()
+        {
+            Process? process = ProcessHelper.GetProcess("WeChat");
+            if (process == null)
+            {
+                return null;
+            }
+            ProcessModule? module = ProcessHelper.FindProcessModule(process.Id, "WeChatWin.dll");
+            if (module == null)
+            {
+                return null;
+            }
+            string? version = module.FileVersionInfo.FileVersion;
+            if (version == null)
+            {
+                return null;
+            }
+            //这里加的是版本偏移量，兼容不同版本把这个加给改了
+            long baseAddress = (long)module.BaseAddress + 62031872;
+            byte[]? bytes = ProcessHelper.ReadMemoryDate(process.Handle, (IntPtr)baseAddress, 8);
+            if (bytes != null)
+            {
+                IntPtr baseAddress2 = (IntPtr)(((long)bytes[7] << 56) + ((long)bytes[6] << 48) + ((long)bytes[5] << 40) + ((long)bytes[4] << 32) + ((long)bytes[3] << 24) + ((long)bytes[2] << 16) + ((long)bytes[1] << 8) + (long)bytes[0]);
+                byte[]? twoGet = ProcessHelper.ReadMemoryDate(process.Handle, baseAddress2, 32);
+                if (twoGet != null)
+                {
+                    string key = BytesToHex(twoGet);
+                    return twoGet;
+                }
+            }
+            return null;
+        }
+        public static byte[] DecryptDB(byte[] db_file_bytes, byte[] password_bytes)
+        {
+            //数据库头16字节是盐值
+            var salt = db_file_bytes.Take(16).ToArray();
+            //HMAC验证时用的盐值需要亦或0x3a
+            byte[] hmac_salt = new byte[16];
+            for (int i = 0; i < salt.Length; i++)
+            {
+                hmac_salt[i] = (byte)(salt[i] ^ 0x3a);
+            }
+            //计算保留段长度
+            int reserved = IV_SIZE;
+            reserved += HMAC_SHA1_SIZE;
+            reserved = ((reserved % AES_BLOCK_SIZE) == 0) ? reserved : ((reserved / AES_BLOCK_SIZE) + 1) * AES_BLOCK_SIZE;
+
+            //密钥扩展，分别对应AES解密密钥和HMAC验证密钥
+            byte[] key = new byte[KEY_SIZE];
+            byte[] hmac_key = new byte[KEY_SIZE];
+            OpenSSLInterop.PKCS5_PBKDF2_HMAC_SHA1(password_bytes, password_bytes.Length, salt, salt.Length, DEFAULT_ITER, key.Length, key);
+            OpenSSLInterop.PKCS5_PBKDF2_HMAC_SHA1(key, key.Length, hmac_salt, hmac_salt.Length, 2, hmac_key.Length, hmac_key);
+
+            int page_no = 0;
+            int offset = 16;
+            Console.WriteLine("开始解密...");
+            var hmac_sha1 = HMAC.Create("HMACSHA1");
+            hmac_sha1!.Key = hmac_key;
+            List<byte> decrypted_file_bytes = new List<byte>();
+            while (page_no < db_file_bytes.Length / DEFAULT_PAGESIZE)
+            {
+                byte[] decryped_page_bytes = new byte[DEFAULT_PAGESIZE];
+                byte[] going_to_hashed = new byte[DEFAULT_PAGESIZE - reserved - offset + IV_SIZE + 4];
+                db_file_bytes.Skip((page_no * DEFAULT_PAGESIZE) + offset).Take(DEFAULT_PAGESIZE - reserved - offset + IV_SIZE).ToArray().CopyTo(going_to_hashed, 0);
+                var page_bytes = BitConverter.GetBytes(page_no + 1);
+                page_bytes.CopyTo(going_to_hashed, DEFAULT_PAGESIZE - reserved - offset + IV_SIZE);
+                //计算分页的Hash
+                var hash_mac_compute = hmac_sha1.ComputeHash(going_to_hashed, 0, going_to_hashed.Count());
+                //取出分页中存储的Hash
+                var hash_mac_cached = db_file_bytes.Skip((page_no * DEFAULT_PAGESIZE) + DEFAULT_PAGESIZE - reserved + IV_SIZE).Take(hash_mac_compute.Length).ToArray();
+                //对比两个Hash
+                if (!hash_mac_compute.SequenceEqual(hash_mac_cached))
+                {
+                    Console.WriteLine("Hash错误...");
+                    return decrypted_file_bytes.ToArray();
+                }
+                else
+                {
+                    Console.WriteLine($"解密第[{page_no + 1}]页");
+                    if (page_no == 0)
+                    {
+                        var header_bytes = Encoding.ASCII.GetBytes(SQLITE_HEADER);
+                        header_bytes.CopyTo(decryped_page_bytes, 0);
+                    }
+                    var encrypted_content = db_file_bytes.Skip((page_no * DEFAULT_PAGESIZE) + offset).Take(DEFAULT_PAGESIZE - reserved - offset).ToArray();
+                    var iv = db_file_bytes.Skip((page_no * DEFAULT_PAGESIZE) + (DEFAULT_PAGESIZE - reserved)).Take(16).ToArray();
+                    var decrypted_content = DecryptionHelper.AESDecrypt(encrypted_content, key, iv);
+                    decrypted_content.CopyTo(decryped_page_bytes, offset);
+                    var reserved_bytes = db_file_bytes.Skip((page_no * DEFAULT_PAGESIZE) + DEFAULT_PAGESIZE - reserved).Take(reserved).ToArray();
+                    reserved_bytes.CopyTo(decryped_page_bytes, DEFAULT_PAGESIZE - reserved);
+                }
+                page_no++;
+                offset = 0;
+                foreach (var item in decryped_page_bytes)
+                {
+                    decrypted_file_bytes.Add(item);
+                }
+            }
+            return decrypted_file_bytes.ToArray();
+        }
+        public static byte[] AESDecrypt(byte[] content, byte[] key, byte[] iv)
+        {
+            Aes rijndaelCipher = Aes.Create();
+            rijndaelCipher.Mode = CipherMode.CBC;
+            rijndaelCipher.Padding = PaddingMode.None;
+            rijndaelCipher.KeySize = 256;
+            rijndaelCipher.BlockSize = 128;
+            rijndaelCipher.Key = key;
+            rijndaelCipher.IV = iv;
+            ICryptoTransform transform = rijndaelCipher.CreateDecryptor();
+            byte[] plain_bytes = transform.TransformFinalBlock(content, 0, content.Length);
+            return plain_bytes;
+        }
+        private static string BytesToHex(byte[] bytes)
+        {
+            return BitConverter.ToString(bytes, 0).Replace("-", string.Empty).ToLower().ToUpper();
+        }
+    }
+
+}

Helpers/OpenSSLInterop.cs

@@ -0,0 +1,51 @@
+using System;
+using System.Collections.Generic;
+using System.Runtime.InteropServices;
+using System.Text;
+
+namespace WechatPCMsgBakTool.Helpers
+{
+    public class OpenSSLInterop
+    {
+        private const string Lib = "libcrypto-1_1-x64";
+        internal static unsafe int HMAC_Init(out HMAC_CTX ctx, byte[] key, int key_len, IntPtr md)
+        {
+            return HMAC_InitNative(out ctx, key, key_len, md);
+        }
+
+        internal static void HMAC_Init_ex(ref HMAC_CTX ctx, byte[] key, int key_len, IntPtr md, IntPtr zero)
+        {
+            HMAC_Init_exNative(ref ctx, key, key_len, md, zero);
+        }
+
+        internal static unsafe int HMAC_Update(ref HMAC_CTX ctx, byte* data, int len)
+        {
+            return HMAC_UpdateNative(ref ctx, data, len);
+        }
+
+        internal static unsafe int HMAC_Final(ref HMAC_CTX ctx, byte* md, ref uint len)
+        {
+            return HMAC_FinalNative(ref ctx, md, ref len);
+        }
+
+        [DllImport(Lib, CallingConvention = CallingConvention.Cdecl)]
+        public extern static int PKCS5_PBKDF2_HMAC_SHA1(byte[] pass, int passlen, byte[] salt, int saltlen, int iter, int keylen, byte[] outBytes);
+        [DllImport(Lib, EntryPoint = "HMAC_Init", ExactSpelling = true)]
+        private extern static unsafe int HMAC_InitNative(out HMAC_CTX ctx, byte[] key, int key_len, IntPtr md);
+
+        [DllImport(Lib, EntryPoint = "HMAC_Init_ex", ExactSpelling = true)]
+        private extern static void HMAC_Init_exNative(ref HMAC_CTX ctx, byte[] key, int key_len, IntPtr md, IntPtr zero);
+
+        [DllImport(Lib, EntryPoint = "HMAC_Update", ExactSpelling = true)]
+        private extern static unsafe int HMAC_UpdateNative(ref HMAC_CTX ctx, byte* data, int len);
+
+        [DllImport(Lib, EntryPoint = "HMAC_Final", ExactSpelling = true)]
+        private extern static unsafe int HMAC_FinalNative(ref HMAC_CTX ctx, byte* md, ref uint len);
+
+        [DllImport(Lib)]
+        internal extern static unsafe void HMAC_CTX_cleanup(ref HMAC_CTX ctx);
+
+        [StructLayout(LayoutKind.Explicit, Size = 512)]
+        internal struct HMAC_CTX { }
+    }
+}

Helpers/ProcessHelper.cs

@@ -0,0 +1,45 @@
+using System;
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.Linq;
+using System.Runtime.InteropServices;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace WechatPCMsgBakTool.Helpers
+{
+    public class ProcessHelper
+    {
+        public static Process? GetProcess(string ProcessName)
+        {
+            Process[] processes = Process.GetProcessesByName(ProcessName);
+            if (processes.Length == 0)
+                return null;
+            else
+                return processes[0];
+        }
+
+        public static ProcessModule? FindProcessModule(int ProcessId, string ModuleName)
+        {
+            Process process = Process.GetProcessById(ProcessId);
+            foreach (ProcessModule module in process.Modules)
+            {
+                if (module.ModuleName == ModuleName)
+                    return module;
+            }
+            return null;
+        }
+
+        public static byte[]? ReadMemoryDate(IntPtr hProcess, IntPtr lpBaseAddress, int nSize = 100)
+        {
+            byte[] array = new byte[nSize];
+            if (ReadProcessMemory(hProcess, lpBaseAddress, array, nSize, 0) == 0)
+                return null;
+            else
+                return array;
+        }
+
+        [DllImport("kernel32.dll")]
+        public static extern int ReadProcessMemory(IntPtr hProcess, IntPtr lpBaseAddress, byte[] lpBuffer, int nSize, int lpNumberOfBytesRead);
+    }
+}

Helpers/WechatDBHelper.cs

@@ -0,0 +1,185 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Security.Cryptography;
+using System.Text;
+using System.Threading.Tasks;
+using WechatPCMsgBakTool.Model;
+
+namespace WechatPCMsgBakTool.Helpers
+{
+    public class WechatDBHelper
+    {
+        private static string ResPath = "";
+        private static string CurrentPath = AppDomain.CurrentDomain.BaseDirectory;
+        private static string UserWorkPath = "";
+        private static int MaxMediaDBCount = 0;
+        private static int MaxMsgDBCount = 0;
+        public static DBInfo GetDBInfo()
+        {
+            return new DBInfo() { MaxMediaDBCount = MaxMediaDBCount, MaxMsgDBCount = MaxMsgDBCount, UserPath = UserWorkPath, ResPath = ResPath };
+        }
+
+        public static DBInfo GetDBinfoOnLocal(string path)
+        {
+            string md5 = GetMd5Hash(path);
+            string tmpPath = Path.Combine(CurrentPath, md5);
+
+            string decPath = Path.Combine(tmpPath, "DecDB");
+            string[] files = Directory.GetFiles(decPath);
+            int media = 0;
+            int msg = 0;
+            foreach(string file in files)
+            {
+                FileInfo fileInfo = new FileInfo(file);
+                if(fileInfo.Extension == ".db")
+                {
+                    string name = fileInfo.Name.Replace(".db", "");
+                    if(name.Substring(0,3) == "MSG")
+                    {
+                        name = name.Replace("MSG", "");
+                        int currentDB = int.Parse(name);
+                        if(currentDB > msg)
+                            msg = currentDB;
+                        continue;
+                    }
+                    if(name.Substring(0,8)== "MediaMSG")
+                    {
+                        name = name.Replace("MediaMSG", "");
+                        int currentDB = int.Parse(name);
+                        if (currentDB > media)
+                            media = currentDB;
+                        continue;
+                    }
+                }
+            }
+            return new DBInfo() { MaxMediaDBCount = media, MaxMsgDBCount = msg, UserPath = tmpPath, ResPath = path };
+        }
+
+        public static void CreateUserWorkPath(string path)
+        {
+            ResPath = path;
+            string md5 = GetMd5Hash(path);
+            string tmpPath = Path.Combine(CurrentPath, md5);
+            if (!Directory.Exists(tmpPath))
+            {
+                Directory.CreateDirectory(tmpPath);
+            }
+            UserWorkPath = tmpPath;
+        }
+
+        public static string MoveUserData(string path)
+        {
+            if(UserWorkPath != "")
+            {
+                //创建db库
+                string db = Path.Combine(UserWorkPath, "DB");
+                if (!Directory.Exists(db))
+                {
+                    Directory.CreateDirectory(db);
+                }
+
+                //核心数据库查找
+                List<string> dbPathArray = new List<string>();
+
+                string userDBPath = Path.Combine(path, "Msg");
+                if (!Directory.Exists(userDBPath))
+                    return "用户目录不存在，创建失败";
+
+                string mainDB = Path.Combine(userDBPath, "MicroMsg.db");
+                if (!File.Exists(mainDB))
+                    return "微信主数据库不存在，创建失败";
+                else
+                    dbPathArray.Add(mainDB);
+
+                string actDB = Path.Combine(userDBPath, "MultiSearchChatMsg.db");
+                if(!File.Exists(actDB))
+                    return "微信附件数据库不存在，创建失败";
+                else
+                    dbPathArray.Add(actDB);
+
+                string dbmsg = Path.Combine(userDBPath, "Multi");
+                bool mediaDBExists = false;
+                bool msgDBExists = false;
+                for(int i = 0; i < 100; i++)
+                {
+                    string mediaDBPath = Path.Combine(dbmsg, string.Format("MediaMSG{0}.db", i.ToString()));
+                    string msgDBPath = Path.Combine(dbmsg, string.Format("MSG{0}.db", i.ToString()));
+
+                    mediaDBExists = File.Exists(mediaDBPath);
+                    msgDBExists = File.Exists(msgDBPath);
+
+                    if (i == 0 && !mediaDBExists && !msgDBExists)
+                    {
+                        return "微信聊天记录数据不存在，创建失败";
+                    }
+
+                    if(mediaDBExists)
+                        dbPathArray.Add(mediaDBPath);
+
+                    if (msgDBExists)
+                        dbPathArray.Add(msgDBPath);
+
+                    if (!msgDBExists && !msgDBExists)
+                        break;
+                }
+
+                foreach(string dbPath in dbPathArray) { 
+                    FileInfo file = new FileInfo(dbPath);
+                    string to = Path.Combine(db, file.Name);
+                    if(!File.Exists(to))
+                        File.Copy(dbPath, to);
+                }
+                return "";
+
+            }
+            return "请复制目录至文本框内";
+        }
+        public static void DecryUserData(byte[] key)
+        {
+            string dbPath = Path.Combine(UserWorkPath, "DB");
+            string decPath = Path.Combine(UserWorkPath, "DecDB");
+            if(!Directory.Exists(decPath))
+                Directory.CreateDirectory(decPath);
+
+            string[] filePath = Directory.GetFiles(dbPath);
+            foreach (string file in filePath)
+            {
+                FileInfo info = new FileInfo(file);
+                var db_bytes = File.ReadAllBytes(file);
+                var decrypted_file_bytes = DecryptionHelper.DecryptDB(db_bytes, key);
+                if (decrypted_file_bytes == null || decrypted_file_bytes.Length == 0)
+                {
+                    Console.WriteLine("解密后的数组为空");
+                }
+                else
+                {
+                    File.WriteAllBytes(Path.Combine(decPath, info.Name), decrypted_file_bytes);
+                }
+            }
+        }
+        private static string GetMd5Hash(string input)
+        {
+            using (MD5 md5Hash = MD5.Create())
+            {
+                // Convert the input string to a byte array and compute the hash.
+                byte[] data = md5Hash.ComputeHash(Encoding.UTF8.GetBytes(input));
+
+                // Create a new Stringbuilder to collect the bytes
+                // and create a string.
+                StringBuilder sBuilder = new StringBuilder();
+
+                // Loop through each byte of the hashed data 
+                // and format each one as a hexadecimal string.
+                for (int i = 0; i < data.Length; i++)
+                {
+                    sBuilder.Append(data[i].ToString("x2"));
+                }
+
+                // Return the hexadecimal string.
+                return sBuilder.ToString();
+            }
+        }
+    }
+}

HtmlExport.cs

@@ -0,0 +1,89 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using WechatPCMsgBakTool.Interface;
+using WechatPCMsgBakTool.Model;
+
+namespace WechatPCMsgBakTool
+{
+    public class HtmlExport : IExport
+    {
+        private string HtmlBody = "";
+        private WXSession? Session = null;
+        public void InitTemplate(WXSession session)
+        {
+            Session = session;
+            HtmlBody = "<!DOCTYPE html><html><head><meta charset=\"utf-8\"><title>溯雪微信聊天记录备份工具</title><style>p{margin:0px;}.msg{padding-bottom:10px;}.nickname{font-size:10px;}.content{font-size:14px;}</style></head><body>";
+
+            HtmlBody += string.Format("<div class=\"msg\"><p class=\"nickname\"><b>与 {0}({1}) 的聊天记录</b></p>", Session.NickName, Session.UserName);
+            HtmlBody += string.Format("<div class=\"msg\"><p class=\"nickname\"><b>导出时间：{0}</b></p><hr/>", DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss"));
+        }
+
+        public void Save(string path = "",bool append = false)
+        {
+            if (!append)
+            {
+                File.WriteAllText(path, HtmlBody);
+            }
+            else
+            {
+                File.AppendAllText(path, HtmlBody);
+                HtmlBody = "";
+            }
+            
+        }
+
+        public void SetEnd()
+        {
+            HtmlBody += "</body></html>";
+        }
+
+        public void SetMsg(WXReader reader, WXSession session)
+        {
+            List<WXMsg> msgList = reader.GetMsgs(session.UserName);
+            msgList.Sort((x, y) => x.CreateTime.CompareTo(y.CreateTime));
+            foreach (var msg in msgList)
+            {
+                if (Session == null)
+                    throw new Exception("请初始化模版：Not Use InitTemplate");
+                HtmlBody += string.Format("<div class=\"msg\"><p class=\"nickname\">{0} <span style=\"padding-left:10px;\">{1}</span></p>", msg.IsSender ? "我" : Session.NickName, TimeStampToDateTime(msg.CreateTime).ToString("yyyy-MM-dd HH:mm:ss"));
+
+                if (msg.Type == 1)
+                    HtmlBody += string.Format("<p class=\"content\">{0}</p></div>", msg.StrContent);
+                else if(msg.Type == 3)
+                {
+                    string? path = reader.GetImage(msg);
+                    if (path == null)
+                    {
+                        HtmlBody += string.Format("<p class=\"content\">{0}</p></div>", "图片转换出现错误或文件不存在");
+                        continue;
+                    }
+                    HtmlBody += string.Format("<p class=\"content\"><img src=\"{0}\" style=\"max-height:1000px;max-width:1000px;\"/></p></div>", path);
+                }
+                else if(msg.Type == 43)
+                {
+                    string? path = reader.GetVideo(msg);
+                    if (path == null)
+                    {
+                        HtmlBody += string.Format("<p class=\"content\">{0}</p></div>", "视频不存在");
+                        continue;
+                    }
+                    HtmlBody += string.Format("<p class=\"content\"><video controls style=\"max-height:300px;max-width:300px;\"><source src=\"{0}\" type=\"video/mp4\" /></video></p></div>", path);
+                }
+                else
+                {
+                    HtmlBody += string.Format("<p class=\"content\">{0}</p></div>", "暂未支持的消息");
+                }
+            }
+        }
+
+        private static DateTime TimeStampToDateTime(long timeStamp, bool inMilli = false)
+        {
+            DateTimeOffset dateTimeOffset = inMilli ? DateTimeOffset.FromUnixTimeMilliseconds(timeStamp) : DateTimeOffset.FromUnixTimeSeconds(timeStamp);
+            return dateTimeOffset.LocalDateTime;
+        }
+    }
+}

Interface/ExportInterface.cs

@@ -0,0 +1,18 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using WechatPCMsgBakTool.Model;
+
+namespace WechatPCMsgBakTool.Interface
+{
+    public interface IExport
+    {
+        void InitTemplate(WXSession session);
+        void SetMsg(WXReader reader, WXSession session);
+        void SetEnd();
+        void Save(string path = "", bool append = false);
+
+    }
+}

LICENSE.txt

@@ -0,0 +1,661 @@
+                    GNU AFFERO GENERAL PUBLIC LICENSE
+                       Version 3, 19 November 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+                            Preamble
+
+  The GNU Affero General Public License is a free, copyleft license for
+software and other kinds of works, specifically designed to ensure
+cooperation with the community in the case of network server software.
+
+  The licenses for most software and other practical works are designed
+to take away your freedom to share and change the works.  By contrast,
+our General Public Licenses are intended to guarantee your freedom to
+share and change all versions of a program--to make sure it remains free
+software for all its users.
+
+  When we speak of free software, we are referring to freedom, not
+price.  Our General Public Licenses are designed to make sure that you
+have the freedom to distribute copies of free software (and charge for
+them if you wish), that you receive source code or can get it if you
+want it, that you can change the software or use pieces of it in new
+free programs, and that you know you can do these things.
+
+  Developers that use our General Public Licenses protect your rights
+with two steps: (1) assert copyright on the software, and (2) offer
+you this License which gives you legal permission to copy, distribute
+and/or modify the software.
+
+  A secondary benefit of defending all users' freedom is that
+improvements made in alternate versions of the program, if they
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+encouraged by the resulting cooperation.  However, in the case of
+software used on network servers, this result may fail to come about.
+The GNU General Public License permits making a modified version and
+letting the public access it on a server without ever releasing its
+source code to the public.
+
+  The GNU Affero General Public License is designed specifically to
+ensure that, in such cases, the modified source code becomes available
+to the community.  It requires the operator of a network server to
+provide the source code of the modified version running there to the
+users of that server.  Therefore, public use of a modified version, on
+a publicly accessible server, gives the public access to the source
+code of the modified version.
+
+  An older license, called the Affero General Public License and
+published by Affero, was designed to accomplish similar goals.  This is
+a different license, not a version of the Affero GPL, but Affero has
+released a new version of the Affero GPL which permits relicensing under
+this license.
+
+  The precise terms and conditions for copying, distribution and
+modification follow.
+
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+
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+
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+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Affero General Public License as published
+    by the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Affero General Public License for more details.
+
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+<https://www.gnu.org/licenses/>.

MainWindow.xaml

@@ -0,0 +1,36 @@
+<Window x:Class="WechatPCMsgBakTool.MainWindow"
+        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
+        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+        xmlns:local="clr-namespace:WechatPCMsgBakTool"
+        mc:Ignorable="d"
+        Title="溯雪PC微信备份工具" Height="450" Width="900">
+    <Grid>
+        <Label Content="用户文件夹：" HorizontalAlignment="Left" Margin="30,27,0,0" VerticalAlignment="Top"/>
+        <TextBox x:Name="txt_user_msg_path" HorizontalAlignment="Left" Margin="110,34,0,0" TextWrapping="Wrap" Text="" VerticalAlignment="Top" Width="400"/>
+        <Button Name="select_user_msg_path" Content="确定" HorizontalAlignment="Left" Width="60" Margin="528,32,0,0" VerticalAlignment="Top" Click="select_user_msg_path_Click"/>
+        <Button x:Name="decryption_user_msg_db" Content="解密" HorizontalAlignment="Left" Width="60" Margin="610,32,0,0" VerticalAlignment="Top" Click="decryption_user_msg_db_Click"/>
+        <Button x:Name="read_user_msg_db" Content="读取" HorizontalAlignment="Left" Width="60" Margin="686,32,0,0" VerticalAlignment="Top" Click="read_user_msg_db_Click"/>
+        <Label Content="会话列表：" HorizontalAlignment="Left" Margin="30,60,0,0" VerticalAlignment="Top"/>
+        <ListView Name="list_sessions" Margin="30,100,0,20" HorizontalAlignment="Left" Width="380" MouseDoubleClick="list_sessions_MouseDoubleClick">
+            <ListView.View>
+                <GridView>
+                    <GridViewColumn Header="昵称" Width="100" DisplayMemberBinding="{Binding NickName}" />
+                    <GridViewColumn Header="原始id" Width="120" DisplayMemberBinding="{Binding UserName}" />
+                    <GridViewColumn Header="最后消息" Width="150" DisplayMemberBinding="{Binding Content}" />
+                </GridView>
+            </ListView.View>
+        </ListView>
+        <Label Content="操作：" HorizontalAlignment="Left" Margin="440,60,0,0" VerticalAlignment="Top"/>
+
+        <Label Content="记录预览：" HorizontalAlignment="Left" Margin="440,150,0,0" VerticalAlignment="Top"/>
+        <ScrollViewer Margin="440,180,20,20" ScrollChanged="ScrollViewer_ScrollChanged" >
+            <Grid Name="msg_list" />
+        </ScrollViewer>
+        <Button x:Name="export_record" Content="导出选中人员记录" HorizontalAlignment="Left" Width="160" Margin="440,105,0,0" VerticalAlignment="Top" Click="export_record_Click" />
+        <TextBox Name="txt_find_session" HorizontalAlignment="Left" Margin="110,67,0,0" TextWrapping="Wrap" Text="" VerticalAlignment="Top" Width="120"/>
+        <Button Name="find_session_person" Content="查找" HorizontalAlignment="Left" Margin="246,67,0,0" VerticalAlignment="Top" Width="70" Click="find_session_person_Click"/>
+        <CheckBox Name="cb_use_local_decdb" Content="使用已解密的工作区读取" HorizontalAlignment="Left" Margin="642,108,0,0" VerticalAlignment="Top"/>
+    </Grid>
+</Window>

MainWindow.xaml.cs

@@ -0,0 +1,174 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Runtime.CompilerServices;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows;
+using System.Windows.Controls;
+using System.Windows.Data;
+using System.Windows.Documents;
+using System.Windows.Input;
+using System.Windows.Media;
+using System.Windows.Media.Imaging;
+using System.Windows.Navigation;
+using System.Windows.Shapes;
+using WechatPCMsgBakTool.Helpers;
+using WechatPCMsgBakTool.Interface;
+using WechatPCMsgBakTool.Model;
+
+namespace WechatPCMsgBakTool
+{
+    /// <summary>
+    /// Interaction logic for MainWindow.xaml
+    /// </summary>
+    public partial class MainWindow : Window
+    {
+        public string UserMsgPath { get; set; } = "";
+        public MainWindow()
+        {
+            InitializeComponent();
+        }
+
+        private void select_user_msg_path_Click(object sender, RoutedEventArgs e)
+        {
+            if (Directory.Exists(txt_user_msg_path.Text))
+            {
+                UserMsgPath = txt_user_msg_path.Text;
+                if (UserMsgPath.Substring(UserMsgPath.Length - 1, 1) == "\\") {
+                    UserMsgPath = UserMsgPath.Substring(0, UserMsgPath.Length - 1);
+                }
+
+                //判定数据目录是否存在
+                if (Directory.Exists(UserMsgPath + "\\Msg"))
+                {
+                    //MessageBox.Show("微信目录存在");
+                }
+
+                //复制数据DB
+                WechatDBHelper.CreateUserWorkPath(UserMsgPath);
+                string err = WechatDBHelper.MoveUserData(UserMsgPath);
+                if(err != "")
+                {
+                    MessageBox.Show(err);
+                    return;
+                }
+                else
+                {
+                    MessageBox.Show("用户目录创建成功，请打开PC微信并登录，获取数据库秘钥解密");
+                }
+            }
+        }
+
+        private void decryption_user_msg_db_Click(object sender, RoutedEventArgs e)
+        {
+            byte[]? key = DecryptionHelper.GetWechatKey();
+            if(key == null)
+            {
+                MessageBox.Show("微信密钥获取失败，请检查微信是否打开,或者版本不兼容");
+                return;
+            }
+            WechatDBHelper.DecryUserData(key);
+            MessageBox.Show("解密完成，请点击读取数据");
+        }
+
+        WXReader? Reader = null;
+        private void read_user_msg_db_Click(object sender, RoutedEventArgs e)
+        {
+            list_sessions.Items.Clear();
+            if (cb_use_local_decdb.IsChecked == true)
+            {
+                DBInfo info = WechatDBHelper.GetDBinfoOnLocal(txt_user_msg_path.Text);
+                Reader = new WXReader(info);
+            }
+            else
+            {
+                Reader = new WXReader();
+            }
+            
+            List<WXSession>? sessions = new List<WXSession>();
+            sessions = Reader.GetWXSessions();
+            if (sessions == null)
+            {
+                MessageBox.Show("咩都厶啊");
+                return;
+            }
+
+            foreach (WXSession session in sessions)
+            {
+                list_sessions.Items.Add(session);
+            }
+        }
+
+        private bool loading = false;
+        private bool end = false;
+        private void ScrollViewer_ScrollChanged(object sender, ScrollChangedEventArgs e)
+        {
+            if (sender == null)
+                return;
+            ScrollViewer scrollViewer = (ScrollViewer)sender;
+            if (scrollViewer.ScrollableHeight == 0)
+                return;
+            if (scrollViewer.ScrollableHeight - scrollViewer.ContentVerticalOffset < 10)
+            {
+                if (!loading && !end)
+                {
+                    loading = true;
+                    //GetMsg();
+                }
+            }
+        }
+
+        private void list_sessions_MouseDoubleClick(object sender, MouseButtonEventArgs e)
+        {
+
+        }
+
+        private void export_record_Click(object sender, RoutedEventArgs e)
+        {
+            WXSession selectItem = (WXSession)list_sessions.SelectedValue;
+            if (selectItem != null)
+            {
+                IExport export = new HtmlExport();
+                export.InitTemplate(selectItem);
+
+                if(Reader == null)
+                {
+                    MessageBox.Show("请先读取用户数据");
+                    return;
+                }
+                
+                export.SetMsg(Reader, selectItem);
+                export.SetEnd();
+
+                string path = Reader.GetSavePath(selectItem);
+                export.Save(path);
+                MessageBox.Show("导出完成");
+            }
+        }
+
+        private void find_session_person_Click(object sender, RoutedEventArgs e)
+        {
+            list_sessions.Items.Clear();
+            if (Reader == null)
+                Reader = new WXReader();
+
+            List<WXContact>? sessions = new List<WXContact>();
+            sessions = Reader.GetUser(txt_find_session.Text);
+            if (sessions == null)
+            {
+                MessageBox.Show("咩都厶啊");
+                return;
+            }
+
+            foreach (WXContact session in sessions)
+            {
+                WXSession session1 = new WXSession();
+                session1.NickName = session.NickName;
+                session1.UserName = session.UserName;
+                list_sessions.Items.Add(session1);
+            }
+        }
+    }
+}

Model/Common.cs

@@ -0,0 +1,22 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace WechatPCMsgBakTool.Model
+{
+    public class DBInfo
+    {
+        public int MaxMsgDBCount { get; set; }
+        public int MaxMediaDBCount { get; set;}
+        public string UserPath { get; set; } = "";
+        public string ResPath { get; set; } = "";
+    }
+
+    public class UserInfo
+    {
+        public string UserName { get; set; } = "";
+        public string NickName { get; set; } = "";
+    }
+}

Model/WXModel.cs

@@ -0,0 +1,98 @@
+using System;
+using System.Collections.Generic;
+using SQLite;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace WechatPCMsgBakTool.Model
+{
+    public class WXUserInfo
+    {
+        public string UserName { get; set; } = "";
+        public string Alias { get; set; } = "";
+        public int DelFlag { get; set; }
+        public int Flag { get; set; }
+        public string NickName { get; set; } = "";
+        public string LabelIDList { get; set; } = "";
+    }
+
+    public class WXUserImgUrl
+    {
+        [Column("usrName")]
+        public string UserName { get; set; } = "";
+
+        [Column("bigHeadImgUrl")]
+        public string Img { get; set; } = "";
+    }
+
+    [Table("Session")]
+    public class WXSession
+    {
+        [Column("strUsrName")]
+        public string UserName { get; set; } = "";
+        [Column("nOrder")]
+        public long Order { get; set; }
+        [Column("strNickName")]
+        public string NickName { get; set; } = "";
+        [Column("strContent")]
+        public string Content { get; set; } = "";
+        [Column("nTime")]
+        public int LastTime { get; set; }
+        public int ReadCount { get; set; }
+        public int LastMsgId { get; set; }
+    }
+
+    [Table("SessionAttachInfo")]
+    public class WXSessionAttachInfo
+    {
+        [Column("attachId")]
+        public int AtcId { get; set; }
+        [Column("msgType")]
+        public int MsgType { get; set; }
+        [Column("msgId")]
+        public string msgId { get; set; } = "";
+        [Column("msgTime")]
+        public long msgTime { get; set; }
+        [Column("attachPath")]
+        public string attachPath { get; set; } = "";
+        [Column("attachSize")]
+        public int attachSize { get; set; }
+    }
+    [Table("Media")]
+    public class WXMedia
+    {
+        public string Key { get; set; } = "";
+        public string Reserved0 { get; set; } = "";
+        public byte[]? Buf { get; set; }
+    }
+    [Table("MSG")]
+    public class WXMsg
+    {
+        [Column("localId")]
+        public int LocalId { get; set; }
+        [Column("Type")]
+        public int Type { get; set; }
+        [Column("CreateTime")]
+        public long CreateTime { get; set; }
+        [Column("IsSender")]
+        public bool IsSender { get; set; }
+        [Column("MsgSvrID")]
+        public string MsgSvrID { get; set; } = "";
+        [Column("StrTalker")]
+        public string StrTalker { get; set; } = "";
+        [Column("StrContent")]
+        public string StrContent { get; set; } = "";
+    }
+
+    [Table("Contact")]
+    public class WXContact
+    {
+        [Column("UserName")]
+        public string UserName { get; set; } = "";
+        [Column("Alias")]
+        public string Alias { get; set; } = "";
+        [Column("NickName")]
+        public string NickName { get; set; } = "";
+    }
+}

README.md

@@ -0,0 +1,25 @@
+# WechatPCMsgBakTool
+微信PC聊天记录备份工具，仅支持Windows
+
+- 支持3.9.6.33版本
+- 导出图片、视频
+- 导出Html文件
+
+本项目仅做学习使用，供个人备份自己的微信，请勿做其他用途使用。
+
+本项目严禁商用。
+
+#### 使用
+<p>1.打开微信，并登录。</p>
+<p>2.将微信设置内的个人目录，填入用户文件夹的文本框，注意，需要带账号，你从微信设置里面点点打开文件夹那个路径就是对的了。</p>
+<p>3.依次点击，确定，解密，读取，即可在左侧见到会话列表了。>3.依次点击，确定，解密，读取，即可在左侧见到会话列表了。</p>
+<p>4.如果会话列表内没有这个人，你可以按账号搜索。</p>
+<p>5.如果使用过程中发生崩溃，请删除工作区试一下，工作区即根据用户名在运行目录下生成的md5文件夹。</p>
+<p>6.如果你已经读取过一次数据了，想离线使用，请填入微信个人目录后，选择使用已解密的工作区读取，即可本地离线加载。</p>
+<p>7.再次强调，仅供个人备份自己微信使用 </p>
+
+#### 参考/引用
+都是站在大佬们的肩膀上完成的项目，本项目 参考/引用 了以下 项目/文章 内代码。
+##### [Mr0x01/WXDBDecrypt.NET](https://github.com/Mr0x01/WXDBDecrypt.NET")
+##### [AdminTest0/SharpWxDump](https://github.com/AdminTest0/SharpWxDump")
+##### [吾爱破解chenhahacjl/微信 DAT 图片解密 （C#）](https://www.52pojie.cn/forum.php?mod=viewthread&tid=1507922")

WXReader.cs

@@ -0,0 +1,259 @@
+using SQLite;
+using System;
+using System.Collections;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows.Documents;
+using System.Windows.Interop;
+using WechatPCMsgBakTool.Helpers;
+using WechatPCMsgBakTool.Model;
+
+namespace WechatPCMsgBakTool
+{
+    public class WXReader
+    {
+        private DBInfo DecDBInfo;
+        private Dictionary<string, SQLiteConnection> DBInfo = new Dictionary<string, SQLiteConnection>();
+        public WXReader(DBInfo? info = null) {
+            if (info == null)
+                DecDBInfo = WechatDBHelper.GetDBInfo();
+            else
+                DecDBInfo = info;
+
+            string[] dbFileList = Directory.GetFiles(Path.Combine(DecDBInfo.UserPath, "DecDB"));
+            foreach (var item in dbFileList)
+            {
+                FileInfo fileInfo = new FileInfo(item);
+                if (fileInfo.Extension != ".db")
+                    continue;
+                SQLiteConnection con = new SQLiteConnection(item);
+                string dbName = fileInfo.Name.Split('.')[0];
+                DBInfo.Add(dbName, con);
+            }
+        }
+
+        public List<WXSession>? GetWXSessions(string? name = null)
+        {
+            SQLiteConnection con = DBInfo["MicroMsg"];
+            if (con == null)
+                return null;
+            string query = "select * from session";
+            if(name != null)
+            {
+                query = "select * from session where strUsrName = ?";
+                return con.Query<WXSession>(query, name);
+            }
+            return con.Query<WXSession>(query);
+        }
+
+        public List<WXContact>? GetUser(string? name = null)
+        {
+            SQLiteConnection con = DBInfo["MicroMsg"];
+            if (con == null)
+                return null;
+            string query = "select * from contact";
+            if (name != null)
+            {
+                query = "select * from contact where username = ? or alias = ?";
+                return con.Query<WXContact>(query, name, name);
+            }
+            return con.Query<WXContact>(query);
+        }
+
+        public WXSessionAttachInfo? GetWXMsgAtc(WXMsg msg)
+        {
+            SQLiteConnection con = DBInfo["MultiSearchChatMsg"];
+            if (con == null)
+                return null;
+
+            string query = "select * from SessionAttachInfo where msgId = ? order by attachsize desc";
+            List<WXSessionAttachInfo> list = con.Query<WXSessionAttachInfo>(query, msg.MsgSvrID);
+            if (list.Count != 0)
+                return list[0];
+            else
+                return null;
+        }
+
+        public List<WXMsg> GetMsgs(string uid)
+        {
+            List<WXMsg> tmp = new List<WXMsg>();
+            for(int i = 0; i <= DecDBInfo.MaxMsgDBCount; i++)
+            {
+                SQLiteConnection con = DBInfo["MSG" + i.ToString()];
+                if (con == null)
+                    continue;
+
+                string query = "select * from MSG where StrTalker=?";
+                List<WXMsg> wXMsgs = con.Query<WXMsg>(query, uid);
+                foreach(WXMsg w in wXMsgs)
+                {
+                    tmp.Add(w);
+                }
+            }
+            return tmp;
+        }
+
+        public string? GetVideo(WXMsg msg)
+        {
+            WXSessionAttachInfo? attachInfo = GetWXMsgAtc(msg);
+            if (attachInfo == null)
+                return null;
+
+            string resBasePath = Path.Combine(DecDBInfo.ResPath, attachInfo.attachPath);
+            if (!File.Exists(resBasePath))
+                return null;
+
+            string videoPath = Path.Combine(DecDBInfo.UserPath, msg.StrTalker, "Video");
+            if (!Directory.Exists(videoPath))
+                Directory.CreateDirectory(videoPath);
+
+            FileInfo fileInfo = new FileInfo(resBasePath);
+            string savePath = Path.Combine(videoPath, fileInfo.Name);
+
+            if(!File.Exists(savePath))
+                File.Copy(resBasePath, savePath, false);
+            return savePath;
+        }
+
+        public string GetSavePath(WXSession session)
+        {
+            string savePath = Path.Combine(DecDBInfo.UserPath, session.UserName + ".html");
+            return savePath;
+        }
+
+        public string? GetImage(WXMsg msg)
+        {
+            WXSessionAttachInfo? attachInfo = GetWXMsgAtc(msg);
+            if (attachInfo == null)
+                return null;
+
+            string resBasePath = Path.Combine(DecDBInfo.ResPath, attachInfo.attachPath);
+
+            //部分attachpath可能会附加md5校验，这里做处理
+            int index = attachInfo.attachPath.IndexOf(".dat");
+            if (attachInfo.attachPath.Length - index > 10)
+            {
+                resBasePath = resBasePath.Substring(0, resBasePath.Length - 32);
+            }
+
+            if (!File.Exists(resBasePath))
+                return null;
+
+            string imgPath = Path.Combine(DecDBInfo.UserPath, msg.StrTalker, "Image");
+            if (!Directory.Exists(imgPath))
+                Directory.CreateDirectory(imgPath);
+
+            string img = DecImage(resBasePath, imgPath);
+            return img;
+        }
+
+        private string DecImage(string source,string toPath)
+        {
+            //读取数据
+            byte[] fileBytes = File.ReadAllBytes(source);
+            //算差异转换
+            byte key = getImgKey(fileBytes);
+            fileBytes = ConvertData(fileBytes, key);
+            //取文件类型
+            string type = CheckFileType(fileBytes);
+            //
+            FileInfo fileInfo = new FileInfo(source);
+            string fileName = fileInfo.Name.Substring(0, fileInfo.Name.Length - 4);
+            string saveFilePath = Path.Combine(toPath, fileName + type);
+            using (FileStream fileStream = File.OpenWrite(saveFilePath))
+            {
+                fileStream.Write(fileBytes, 0, fileBytes.Length);
+                fileStream.Flush();
+            }
+            return saveFilePath;
+        }
+        private string CheckFileType(byte[] data)
+        {
+            switch (data[0])
+            {
+                case 0XFF:  //byte[] jpg = new byte[] { 0xFF, 0xD8, 0xFF };
+                    {
+                        if (data[1] == 0xD8 && data[2] == 0xFF)
+                        {
+                            return ".jpg";
+                        }
+                        break;
+                    }
+                case 0x89:  //byte[] png = new byte[] { 0x89, 0x50, 0x4E, 0x47, 0x0D, 0x0A, 0x1A, 0x0A };
+                    {
+                        if (data[1] == 0x50 && data[2] == 0x4E && data[7] == 0x0A)
+                        {
+                            return ".png";
+                        }
+                        break;
+                    }
+                case 0x42:  //byte[] bmp = new byte[] { 0x42, 0x4D };
+                    {
+                        if (data[1] == 0X4D)
+                        {
+                            return ".bmp";
+                        }
+                        break;
+                    }
+                case 0x47:  //byte[] gif = new byte[] { 0x47, 0x49, 0x46, 0x38, 0x39(0x37), 0x61 };
+                    {
+                        if (data[1] == 0x49 && data[2] == 0x46 && data[3] == 0x38 && data[5] == 0x61)
+                        {
+                            return ".gif";
+                        }
+                        break;
+                    }
+                case 0x49:  // byte[] tif = new byte[] { 0x49, 0x49, 0x2A, 0x00 };
+                    {
+                        if (data[1] == 0x49 && data[2] == 0x2A && data[3] == 0x00)
+                        {
+                            return ".tif";
+                        }
+                        break;
+                    }
+                case 0x4D:  //byte[] tif = new byte[] { 0x4D, 0x4D, 0x2A, 0x00 };
+                    {
+                        if (data[1] == 0x4D && data[2] == 0x2A && data[3] == 0x00)
+                        {
+                            return ".tif";
+                        }
+                        break;
+                    }
+            }
+
+            return ".dat";
+        }
+        private byte getImgKey(byte[] fileRaw)
+        {
+            byte[] raw = new byte[8];
+            for (int i = 0; i < 8; i++)
+            {
+                raw[i] = fileRaw[i];
+            }
+
+            for (byte key = 0x01; key < 0xFF; key++)
+            {
+                byte[] buf = new byte[8];
+                raw.CopyTo(buf, 0);
+
+                if (CheckFileType(ConvertData(buf, key)) != ".dat")
+                {
+                    return key;
+                }
+            }
+            return 0x00;
+        }
+        private byte[] ConvertData(byte[] data, byte key)
+        {
+            for (int i = 0; i < data.Length; i++)
+            {
+                data[i] ^= key;
+            }
+
+            return data;
+        }
+    }
+}

WechatPCMsgBakTool.csproj

@@ -0,0 +1,24 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>WinExe</OutputType>
+    <TargetFramework>net6.0-windows</TargetFramework>
+    <Nullable>enable</Nullable>
+    <UseWPF>true</UseWPF>
+    <AllowUnsafeBlocks>True</AllowUnsafeBlocks>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="sqlite-net-pcl" Version="1.8.116" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <None Update="libcrypto-1_1-x64.dll">
+      <CopyToOutputDirectory>Always</CopyToOutputDirectory>
+    </None>
+    <None Update="libssl-1_1-x64.dll">
+      <CopyToOutputDirectory>Always</CopyToOutputDirectory>
+    </None>
+  </ItemGroup>
+
+</Project>

WechatPCMsgBakTool.sln

@@ -0,0 +1,25 @@
+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 17
+VisualStudioVersion = 17.5.33530.505
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "WechatPCMsgBakTool", "WechatPCMsgBakTool.csproj", "{2F385240-6FD0-47C5-9B5E-CC8D9AA55B25}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{2F385240-6FD0-47C5-9B5E-CC8D9AA55B25}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{2F385240-6FD0-47C5-9B5E-CC8D9AA55B25}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{2F385240-6FD0-47C5-9B5E-CC8D9AA55B25}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{2F385240-6FD0-47C5-9B5E-CC8D9AA55B25}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {687B0D0F-1496-444B-8117-C613700F7231}
+	EndGlobalSection
+EndGlobal