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‎README.md‎

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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>

‎img/1.png‎

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‎img/2.png‎

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‎img/Logo.ico‎

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‎img/Logo.png‎

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