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‎README.md‎

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# File-Header-Forger
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绕过部分云盘的文件分享限制
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## 用途
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此工具针对使用部分云盘时,受到文件分享类型限制进行伪造
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## 原理
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- aliyundrive在分享文件时,会查看文件头(即文件类型),假如检测到压缩文件等受到限制的文件时会无法分享,在对受限制的文件进行伪造文件头后,即可突破限制,正常分享
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- 如zip的文件头为504b0304,将其改为aliyundrive支持的格式即可
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- ![image](1.jpg)
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- 经过多次测试,经伪造后再还原的文件与原文件对比,hash值始终相同,可放心使用(毕竟只是改了文件的前几个字节)
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- ![image](2.png)
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- 目前(2022/5/2)经过多次测试,aliyundrive只对文件头进行了限制,没对扩展名做限制
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## 伪造/还原格式
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- 目前已支持伪造jpg,png,zip,rar,psd,dll格式,其实可以自己去py文件添加相应的数据
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- 还原模式下无需手动添加,程序会根据后缀名自动恢复
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- ![image](3.png)
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## 缺点
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使用麻烦,配置麻烦,会随之后的更新逐步完善操作体验
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## 参考内容:
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- https://blog.csdn.net/qq_40657585/article/details/83097386
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- https://blog.csdn.net/qq_36171645/article/details/88966127
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- https://qa.1r1g.com/sf/ask/3714342551/?lastactivity
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- https://www.cnblogs.com/schut/p/8410961.html
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- https://blog.51cto.com/u_15052689/2562469
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- https://blog.csdn.net/beijingyk/article/details/108581150
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- https://bluebird.blog.csdn.net/article/details/51122027
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- https://blog.csdn.net/qq_35441988/article/details/84994453
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- https://blog.csdn.net/weixin_40895135/article/details/121033002
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- https://www.jb51.net/article/143446.htm
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- https://blog.csdn.net/qq_40044912/article/details/122596325
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- http://www.wb86.com/post/308.html
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- https://www.bilibili.com/video/BV1134y1B7bo?p=2&spm_id_from=pageDriver
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- https://zhuanlan.zhihu.com/p/457429631
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- https://blog.csdn.net/weixin_29952383/article/details/113983844
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- https://blog.csdn.net/weixin_46348230/article/details/120684653
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- https://blog.csdn.net/qq_25921925/article/details/103987572
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- https://www.pythonheidong.com/blog/article/441185/3494dd82eeff9f34d613/
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- https://www.jianshu.com/p/2a931ce70b4b
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- https://www.cnpython.com/qa/412691
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- https://www.jianshu.com/p/d55e43c694db
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- https://blog.csdn.net/fan0829/article/details/119984383
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- https://www.pythonheidong.com/blog/article/190465/0049cea7f264404867fb/
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- https://www.5axxw.com/questions/content/29kxjs
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- https://zhuanlan.zhihu.com/p/162164360
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- https://zhuanlan.zhihu.com/p/338499426
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---
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##### 2022/5/2 21:10 Created by cyh128
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# File Header Forger/文件伪造器
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- 使用Python编写的程序,GUI使用PyQt5
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- 该程序可用于绕过部分网盘的分享限制（如阿里云盘）
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## 原理
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经本人测试（2023.1)，阿里云盘对文件不光有后缀识别还有文件头识别（不确定，但修改它有效），所以光修改后缀没用，什么是文件头可以自行搜索。如下图，这是一张zip格式的文件的十六进制数据，选中的**504B0304**是zip格式的文件头，它可以说明这是一个zip格式的文件，所以我们想绕过检测的话，也要把它改了。
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![1](/img/1.png)
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我的做法是将首尾的4个字节对调，实现修改
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```
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with open(filePath,"rb+") as rawFile:
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rawFile.seek(0,0) #移动到文件的0(头)处偏移为0的位置
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BOC = rawFile.read(4) #读取节
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rawFile.seek(-4,2) #移动到文件的2(尾)处偏移为-4(向前4个字节)的位置
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EOC = rawFile.read(4
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rawFile.seek(-4,2)
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rawFile.write(BOC) #向文件末尾的4个写成文件开头的4个字节
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rawFile.seek(0,0)
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rawFile.write(EOC) #向文件开头的4个写成文件末尾的4个
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rawFile.close() #关闭文件
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```
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## 使用教程
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1. 将需要伪造的文件的路径填入框内（不要加双引号），支持选择文件或拖入文件 <br>
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仅支持伪造zip文件，如果你想伪造的文件不是zip格式，用压缩软件（如winrar）压缩成zip格式即可
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![2](img/2.png)
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2. 点击伪造或还原按钮，提示伪造成功，文件后缀自动改成.pdf，这时你的文件就可以骗过一些程序的文件类型识别
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3. 如需还原文件（即解压文件），将伪造的文件（pdf格式）拖入程序，点击伪造或还原按钮，提示还原成功
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‎about.ui‎

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<?xml version="1.0" encoding="UTF-8"?>
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<ui version="4.0">
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<class>about</class>
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<widget class="QWidget" name="about">
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<property name="geometry">
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<rect>
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<x>0</x>
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<y>0</y>
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<width>536</width>
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<height>300</height>
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</rect>
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</property>
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<property name="windowTitle">
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<string>关于</string>
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</property>
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<property name="windowIcon">
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<iconset resource="res.qrc">
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<normaloff>:/ico/img/Logo.ico</normaloff>:/ico/img/Logo.ico</iconset>
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</property>
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<widget class="QLabel" name="label">
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<property name="geometry">
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<rect>
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<x>0</x>
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<y>20</y>
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<width>251</width>
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<height>261</height>
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</rect>
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</property>
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<property name="text">
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<string/>
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</property>
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<property name="pixmap">
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<pixmap resource="res.qrc">:/ico/img/Logo.png</pixmap>
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</property>
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<property name="scaledContents">
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<bool>true</bool>
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</property>
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</widget>
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<widget class="QWidget" name="layoutWidget">
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<property name="geometry">
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<rect>
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<x>260</x>
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<y>30</y>
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<width>246</width>
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<height>242</height>
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</rect>
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</property>
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<layout class="QVBoxLayout" name="verticalLayout_3">
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<item>
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<layout class="QVBoxLayout" name="verticalLayout_2">
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<item>
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<layout class="QVBoxLayout" name="verticalLayout">
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<item>
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<widget class="QLabel" name="label_2">
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<property name="font">
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<font>
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<family>Microsoft YaHei</family>
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<pointsize>16</pointsize>
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<weight>75</weight>
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<bold>true</bold>
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</font>
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</property>
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<property name="text">
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<string>文件伪造器</string>
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</property>
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<property name="scaledContents">
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<bool>false</bool>
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</property>
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</widget>
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</item>
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<item>
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<widget class="QLabel" name="label_3">
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<property name="font">
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<font>
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<family>Microsoft YaHei</family>
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<pointsize>10</pointsize>
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</font>
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</property>
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<property name="text">
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<string>本软件使用python和pyqt5编写</string>
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</property>
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</widget>
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</item>
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<item>
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<widget class="QLabel" name="label_4">
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<property name="font">
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<font>
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<family>Microsoft YaHei</family>
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<pointsize>10</pointsize>
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</font>
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</property>
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<property name="text">
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<string>MIT License</string>
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</property>
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</widget>
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</item>
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<item>
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<widget class="QLabel" name="label_5">
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<property name="font">
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<font>
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<family>Microsoft YaHei</family>
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<pointsize>10</pointsize>
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</font>
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</property>
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<property name="text">
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<string>Version 1.4</string>
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</property>
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</widget>
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</item>
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</layout>
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</item>
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</layout>
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</item>
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<item>
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<spacer name="verticalSpacer">
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<property name="orientation">
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<enum>Qt::Vertical</enum>
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</property>
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<property name="sizeType">
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<enum>QSizePolicy::Fixed</enum>
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</property>
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<property name="sizeHint" stdset="0">
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<size>
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<width>20</width>
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<height>60</height>
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</size>
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</property>
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</spacer>
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</item>
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<item>
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<widget class="QPushButton" name="pushButton">
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<property name="font">
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<font>
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<family>Microsoft YaHei</family>
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<pointsize>12</pointsize>
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</font>
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</property>
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<property name="text">
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<string>Github项目</string>
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</property>
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<property name="icon">
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<iconset resource="res.qrc">
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<normaloff>:/ico/img/github Logo.png</normaloff>:/ico/img/github Logo.png</iconset>
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</property>
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</widget>
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</item>
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</layout>
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</widget>
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</widget>
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<resources>
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<include location="res.qrc"/>
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</resources>
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<connections/>
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</ui>

‎forge.ui‎

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<?xml version="1.0" encoding="UTF-8"?>
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<ui version="4.0">
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<class>Form</class>
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<widget class="QWidget" name="Form">
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<property name="geometry">
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<rect>
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<x>0</x>
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<y>0</y>
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<width>445</width>
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<height>261</height>
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</rect>
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</property>
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<property name="windowTitle">
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<string>伪造成功</string>
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</property>
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<property name="windowIcon">
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<iconset resource="res.qrc">
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<normaloff>:/ico/img/Logo.ico</normaloff>:/ico/img/Logo.ico</iconset>
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</property>
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<widget class="QLabel" name="label">
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<property name="geometry">
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<rect>
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<x>20</x>
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<y>20</y>
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<width>150</width>
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<height>150</height>
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</rect>
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</property>
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<property name="text">
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<string/>
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</property>
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<property name="pixmap">
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<pixmap resource="res.qrc">:/ico/img/forge.png</pixmap>
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</property>
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<property name="scaledContents">
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<bool>true</bool>
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</property>
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</widget>
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<widget class="QLabel" name="label_2">
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<property name="geometry">
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<rect>
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<x>210</x>
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<y>60</y>
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<width>201</width>
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<height>61</height>
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</rect>
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</property>
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<property name="font">
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<font>
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<family>Microsoft YaHei</family>
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<pointsize>30</pointsize>
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<weight>75</weight>
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<bold>true</bold>
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</font>
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</property>
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<property name="text">
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<string>伪造成功</string>
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</property>
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</widget>
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<widget class="QPushButton" name="pushButton">
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<property name="geometry">
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<rect>
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<x>30</x>
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<y>190</y>
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<width>381</width>
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<height>41</height>
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</rect>
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</property>
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<property name="font">
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<font>
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<pointsize>10</pointsize>
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<weight>50</weight>
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<bold>false</bold>
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</font>
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</property>
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<property name="text">
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<string>关闭</string>
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</property>
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</widget>
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</widget>
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<resources>
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<include location="res.qrc"/>
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</resources>
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<connections>
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<connection>
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<sender>pushButton</sender>
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<signal>clicked()</signal>
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<receiver>Form</receiver>
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<slot>close()</slot>
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<hints>
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<hint type="sourcelabel">
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<x>59</x>
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<y>24</y>
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</hint>
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<hint type="destinationlabel">
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<x>222</x>
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<y>130</y>
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</hint>
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</hints>
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</connection>
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</connections>
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</ui>

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