[+] 完成基于特征码的防撤回查找替换功能

This commit is contained in:
huiyadanli 2020-01-01 18:32:54 +08:00
parent 604f84b0f6
commit 88f6ae7417
7 changed files with 182 additions and 19 deletions

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@ -93,7 +93,7 @@ namespace RevokeMsgPatcher.Assistant
if (changeOffsets.Count == 0)
{
throw new Exception("查询串与替换串完全相同!请联系作者确认远端补丁信息的正确性。");
throw new Exception("查询串与替换串完全相同!请确认补丁信息的正确性。");
}
List<Change> changes = new List<Change>();

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@ -1,4 +1,5 @@
using RevokeMsgPatcher.Model;
using RevokeMsgPatcher.Model.Enum;
using RevokeMsgPatcher.Modifier;
using RevokeMsgPatcher.Utils;
using System;
@ -95,18 +96,38 @@ namespace RevokeMsgPatcher
ga.RequestPageView($"{enName}/{version}/patch", "点击防撤回");
EnableAllButton(false);
PatchType type = PatchType.Accurate; // 两种打补丁的方式:精准(指定位置替换)、通用(特征码替换)
// a.重新初始化编辑器
modifier.InitEditors(txtPath.Text);
// b.计算SHA1验证文件完整性寻找对应的补丁信息
// b.计算SHA1验证文件完整性寻找对应的补丁信息(精确版本、通用特征码两种补丁信息)
try
{
modifier.ValidateAndFindModifyInfo();
}
catch (BusinessException ex)
{
ga.RequestPageView($"{enName}/{version}/patch/sha1/ex/{ex.ErrorCode}", ex.Message);
MessageBox.Show(ex.Message);
return;
if ((ex.ErrorCode == "not_support" || ex.ErrorCode == "maybe_modified") && modifier.EditorsHasCommonModifyInfos())
{
// 存在特征码修改替换信息的情况下,发起一次询问
DialogResult useCommonPatch =
MessageBox.Show("尝试使用精准匹配补丁程序时发生错误:【" +
ex.Message + "】,不过该版本支持使用特征码替换补丁程序,当前建议继续尝试防撤回!是否继续尝试防撤回?",
"是否使用特征码补丁", MessageBoxButtons.OKCancel, MessageBoxIcon.Question);
if (useCommonPatch == DialogResult.OK)
{
type = PatchType.Common;
}
else
{
return;
}
}
else
{
ga.RequestPageView($"{enName}/{version}/patch/sha1/ex/{ex.ErrorCode}", ex.Message);
MessageBox.Show(ex.Message);
return;
}
}
catch (IOException ex)
{
@ -128,7 +149,7 @@ namespace RevokeMsgPatcher
// c.打补丁
try
{
modifier.Patch();
modifier.Patch(type);
ga.RequestPageView($"{enName}/{version}/patch/succ", "防撤回成功");
MessageBox.Show("补丁安装成功!");
}

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@ -12,6 +12,17 @@ namespace RevokeMsgPatcher.Model
public byte[] Content { get; set; }
public Change()
{
}
public Change(long position, byte[] content)
{
Position = position;
Content = content;
}
public Change Clone()
{
Change o = new Change();

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@ -0,0 +1,18 @@
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace RevokeMsgPatcher.Model.Enum
{
/// <summary>
/// 两种打补丁的方式
/// 精准(指定位置替换)、通用(特征码替换)
/// </summary>
public enum PatchType
{
Accurate, // 精准(指定位置替换)
Common // 通用(特征码替换)
}
}

View File

@ -1,4 +1,5 @@
using RevokeMsgPatcher.Model;
using RevokeMsgPatcher.Model.Enum;
using System;
using System.Collections.Generic;
using System.Drawing;
@ -166,6 +167,30 @@ namespace RevokeMsgPatcher.Modifier
return false;
}
/// <summary>
/// 文件修改器是否已经有对应的特征码修改替换信息
/// </summary>
/// <returns></returns>
public bool EditorsHasCommonModifyInfos()
{
int i = 0;
for (i = 0; i < editors.Count; i++) // 多种文件
{
if (editors[i].FileCommonModifyInfo == null)
{
break;
}
}
if (i == editors.Count)
{
return true;
}
else
{
return false;
}
}
/// <summary>
/// a.初始化修改器
/// </summary>
@ -235,34 +260,40 @@ namespace RevokeMsgPatcher.Modifier
// 补丁后SHA1匹配上肯定已经打过补丁
if (matchingSHA1After != null)
{
throw new BusinessException("installed", $"你已经安装过此补丁,文件路径:{editor.FilePath}");
throw new BusinessException("installed", $"你已经安装过此补丁");
}
// 全部不匹配,说明不支持
if (matchingSHA1Before == null && matchingSHA1After == null && matchingVersion == null)
{
throw new BusinessException("not_support", $"不支持此版本:{editor.FileVersion},文件路径:{editor.FilePath}");
throw new BusinessException("not_support", $"不支持此版本:{editor.FileVersion}");
}
// SHA1不匹配版本匹配可能dll已经被其他补丁程序修改过
if ((matchingSHA1Before == null && matchingSHA1After == null) && matchingVersion != null)
{
throw new BusinessException("maybe_modified", $"程序支持此版本:{editor.FileVersion}。但是文件校验不通过,请确认是否使用过其他补丁程序。文件路径:{editor.FilePath}");
throw new BusinessException("maybe_modified", $"程序支持此版本:{editor.FileVersion}。但是文件校验不通过,请确认是否使用过其他补丁程序");
}
}
}
/// <summary>
/// c.根据补丁信息,安装补丁
/// 两种打补丁的方式:精准(指定位置替换)、通用(特征码替换)
/// </summary>
/// <param name="type">两种打补丁的方式:精准(指定位置替换)、通用(特征码替换)</param>
/// <returns></returns>
public bool Patch()
public bool Patch(PatchType type = PatchType.Accurate)
{
// 首先验证文件修改器是否没问题
foreach (FileHexEditor editor in editors)
{
if (editor.FileModifyInfo == null)
if (type == PatchType.Accurate && editor.FileModifyInfo == null)
{
throw new Exception("补丁安装失败,原因:文件修改器初始化失败!");
}
if (type == PatchType.Common && editor.FileCommonModifyInfo == null)
{
throw new Exception("补丁安装失败,原因:特征码修改器初始化失败!");
}
}
// 再备份所有文件
foreach (FileHexEditor editor in editors)
@ -275,12 +306,15 @@ namespace RevokeMsgPatcher.Modifier
{
foreach (FileHexEditor editor in editors)
{
bool success = editor.Patch();
bool success = editor.Patch(type);
if (!success)
{
editor.Restore();
}
done.Add(editor);
else
{
done.Add(editor);
}
}
}
catch (Exception ex)

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@ -1,4 +1,6 @@
using RevokeMsgPatcher.Model;
using RevokeMsgPatcher.Matcher;
using RevokeMsgPatcher.Model;
using RevokeMsgPatcher.Model.Enum;
using RevokeMsgPatcher.Utils;
using System;
using System.Collections.Generic;
@ -53,7 +55,7 @@ namespace RevokeMsgPatcher.Modifier
public ModifyInfo FileModifyInfo { get; set; }
/// <summary>
/// 通过比对版本范围得到的通用查找替换的修改信息
/// 通过比对版本范围得到的通用查找替换的修改信息(特征码替换信息)
/// </summary>
public CommonModifyInfo FileCommonModifyInfo { get; set; }
@ -76,14 +78,90 @@ namespace RevokeMsgPatcher.Modifier
/// <summary>
/// 打补丁
/// 优先使用特定的补丁信息存在对应SHA1信息
/// 不存在补丁信息,使用通用版本替换方法
/// </summary>
/// <param name="type">两种打补丁的方式:精准(指定位置替换)、通用(特征码替换)</param>
/// <returns></returns>
public bool Patch()
public bool Patch(PatchType type)
{
if (type == PatchType.Accurate)
{
AccuratePatch();
}
else
{
CommonPatch();
}
return true;
}
/// <summary>
/// 精准(指定位置替换)
/// </summary>
public void AccuratePatch()
{
FileUtil.EditMultiHex(FilePath, FileModifyInfo.Changes);
return true;
}
/// <summary>
/// 通用(特征码替换)
/// </summary>
public void CommonPatch()
{
if (FileCommonModifyInfo == null)
{
throw new Exception("特征码替换:缺失对应特征码信息");
}
// 1. 拷贝一份临时文件
File.Copy(FilePath, fileReplacedPath, true);
// 2. 读取整个临时文件
byte[] fileByteArray = File.ReadAllBytes(fileReplacedPath);
// 3. 循环查找所有未替换的替换点
int needReplaceNum = 0;
List<Change> changes = new List<Change>();
foreach (ReplacePattern pattern in FileCommonModifyInfo.ReplacePatterns)
{
int[] indexs = FuzzyMatcher.MatchNotReplaced(fileByteArray, pattern.Search, pattern.Replace);
if (indexs.Length == 1)
{
needReplaceNum++;
changes.Add(new Change(indexs[0], pattern.Replace));
}
}
// 判断是否可以使用特征码替换的方式
if (needReplaceNum == 0)
{
// 查找所有替换点
int matchNum = 0;
foreach (ReplacePattern pattern in FileCommonModifyInfo.ReplacePatterns)
{
int[] indexs = FuzzyMatcher.MatchAll(fileByteArray, pattern.Search);
if (indexs.Length == 1)
{
matchNum++;
}
}
if (matchNum == FileCommonModifyInfo.ReplacePatterns.Count)
{
throw new Exception("特征码替换:当前应用已经防撤回");
}
else
{
throw new Exception("特征码替换:没有搜索到撤回的相关特征");
}
}
else if (needReplaceNum == FileCommonModifyInfo.ReplacePatterns.Count)
{
// 正常情况下每个替换点都能找到
// 3. 替换所有未替换的替换点
FileUtil.EditMultiHex(fileReplacedPath, changes);
// 4. 覆盖特征码替换后的文件
File.Copy(fileReplacedPath, FilePath, true);
}
else
{
throw new Exception("特征码替换:可替换的特征数不正确");
}
}
/// <summary>

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@ -63,6 +63,7 @@
<Compile Include="Model\Bag.cs" />
<Compile Include="Model\Change.cs" />
<Compile Include="Model\CommonModifyInfo.cs" />
<Compile Include="Model\Enum\PatchType.cs" />
<Compile Include="Model\ModifyInfo.cs" />
<Compile Include="Model\ReplacePattern.cs" />
<Compile Include="Model\TargetInfo.cs" />