Windows

文件加密

创建进程

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添加进行加密的进程

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WORK:

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int main(int argc,char** argv)
{
    getchar();

    //判断
    if (argc < 2) {
        return 0;
    }
    char* pFilePath = argv[1];//文件路径

}

用命令行参数传入文件路径

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void CEncriyptUIDlg::OnBnClickedEncrypt()
{
	// TODO: 在此添加控件通知处理程序代码
	//获取文件路径
	CString strFilePath;
	GetDlgItemText(EDT_FILEPATH, strFilePath);
	if (strFilePath.IsEmpty()) {
		AfxMessageBox("路径不能为空");
		return;
	}
    STARTUPINFO si = { sizeof(si) };
PROCESS_INFORMATION pi = {};
CString strCmdLine("Wrok.exe " + strFilePath + "\"");
BOOL bRet = CreateProcess(NULL,
	strCmdLine.GetBuffer(),
	NULL,
	NULL,
	FALSE,
	0,
	NULL,
	NULL,
	&si,
	&pi);
if (!bRet) {
	AfxMessageBox("启动工作进程失败，请重试！");
	return;
}
CloseHandle(pi.hProcess);
CloseHandle(pi.hThread);
}

使用dll共享段传入文件路径

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void CEncriyptUIDlg::OnBnClickedEncrypt()
{
	//获取文件路径
	CString strFilePath;
	GetDlgItemText(EDT_FILEPATH, strFilePath);
	if (strFilePath.IsEmpty()) {
		AfxMessageBox("路径不能为空");
		return;
	}
	//启动工作进程
	//使用dll共享段 传入文件路径
	strcpy_s(g_szFilePath, strFilePath.GetBuffer());

	STARTUPINFO si = { sizeof(si) };
	PROCESS_INFORMATION pi = {};
	CString strCmdLine("Wrok.exe " + strFilePath + "\"");
	BOOL bRet = CreateProcess(NULL,
		"Wrok.exe",
		NULL,
		NULL,
		FALSE,
		0,
		NULL,
		NULL,
		&si,
		&pi);
	if (!bRet) {
		AfxMessageBox("启动工作进程失败，请重试！");
		return;
	}
	CloseHandle(pi.hProcess);
	CloseHandle(pi.hThread);
}

添加dll共享段的dll

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commom.h

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#pragma once
#include<Windows.h>
#ifdef DLLCOMMON_EXPORTS//宏
#define COMMONAPI __declspec(dllexport)
#else
#define COMMONAPI __declspec(dllimport)
#endif
 
extern COMMONAPI CHAR g_szFilePath[MAX_PATH];

这里的宏在属性页中可以找到

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dllmain.cpp

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// dllmain.cpp : 定义 DLL 应用程序的入口点。
#include "pch.h"
#include"common.h"//若不包含头文件 则无法生成.lib文件
#pragma data_seg("EncruptValue")
CHAR g_szFilePath[MAX_PATH] = {};
#pragma data_seg()

#pragma comment(linker,"/SECTION:EncruptValue,RWS")

BOOL APIENTRY DllMain( HMODULE hModule,
                       DWORD  ul_reason_for_call,
                       LPVOID lpReserved
                     )
{
    switch (ul_reason_for_call)
    {
    case DLL_PROCESS_ATTACH:
    case DLL_THREAD_ATTACH:
    case DLL_THREAD_DETACH:
    case DLL_PROCESS_DETACH:
        break;
    }
    return TRUE;
}


使用文件映射传入文件路径

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m_hFileMap = CreateFileMapping(
INVALID_HANDLE_VALUE,
	NULL,
	PAGE_READWRITE,
	0,0x1000,
	"EncryptShared"
);
if (m_hFileMap == NULL) {
	AfxMessageBox("无法创建文件映射对象");
	return;
}
m_pBuff = MapViewOfFile(m_hFileMap,
	FILE_MAP_READ |FILE_MAP_WRITE,
	0,0,0x1000
);

if (m_pBuff == NULL) {
	CloseHandle(m_hFileMap);
	AfxMessageBox("无法映射内存");
	return;
}

strcpy_s((char*)m_pBuff, strFilePath.GetLength(), strFilePath.GetBuffer());


STARTUPINFO si = { sizeof(si) };
PROCESS_INFORMATION pi = {};
CString strCmdLine("Wrok.exe " + strFilePath + "\"");
BOOL bRet = CreateProcess(NULL,
	strCmdLine.GetBuffer(),
	NULL,
	NULL,
	FALSE,
	0,
	NULL,
	NULL,
	&si,
	&pi);
if (!bRet) {
	AfxMessageBox("启动工作进程失败，请重试！");
	return;
}
CloseHandle(pi.hProcess);
CloseHandle(pi.hThread);

获取句柄

encriyptuidlg.h

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#pragma once
#include "../DllCommon/common.h"
#pragma comment(lib,"../EncriyptUI/x64/debug/dllcommon.lib")

enum MYMSG
{
	MM_ENCRIPTFAILD = WM_USER +1
};

// CEncriyptUIDlg 对话框
class CEncriyptUIDlg : public CDialogEx
{
// 构造
public:
	CEncriyptUIDlg(CWnd* pParent = nullptr);	// 标准构造函数

// 对话框数据
#ifdef AFX_DESIGN_TIME
	enum { IDD = IDD_ENCRIYPTUI_DIALOG };
#endif

	protected:
	virtual void DoDataExchange(CDataExchange* pDX);	// DDX/DDV 支持


// 实现
protected:
	HICON m_hIcon;
	HANDLE m_hFileMap = NULL;
	LPVOID m_pBuff = NULL;

work.cpp

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// Work.cpp : 此文件包含 "main" 函数。程序执行将在此处开始并结束。
//

#include <iostream>
#include "../DllCommon/common.h"
#pragma comment(lib,"../EncriyptUI/x64/debug/dllcommon.lib")//链接.lib文件可以打开文件所在位置在debug中寻找
enum MYMSG
{
    MM_ENCRIPTFAILD = WM_USER + 1
};//使用头文件太麻烦 直接包括进来
int main(int argc, char** argv)
{
    getchar();

    
    //判断
    /*if (argc < 2) {
        return 0;
    }*/
    HWND hWndUi = FindWindow(NULL, "UI");//
    if (hWndUi == NULL) {
        return 0;
    }
    //char* pFilePath = argv[1];//文件路径
    HANDLE hFileMap = OpenFileMapping(FILE_MAP_READ | FILE_MAP_WRITE,
        FALSE,
        "EncryptShared");

    if (hFileMap == NULL) {
        SendMessage(hWndUi, MM_ENCRIPTFAILD,NULL,NULL);
        return 0;
    }
    LPVOID pViewBuff = MapViewOfFile(hFileMap, FILE_MAP_READ | FILE_MAP_WRITE,
        0, 0,
        0x1000);
    if (pViewBuff == NULL) {
        CloseHandle(hFileMap);
        SendMessage(hWndUi, MM_ENCRIPTFAILD, NULL, NULL);
        return 0;
    }

    char* pFilePath = (char*)pViewBuff;

    return 0;
}

窗口的名字可以直接在左上角输入

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添加类向导

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afx_msg LRESULT CEncriyptUIDlg::OnMmEncriptfaild(WPARAM wParam, LPARAM lParam)
{
	AfxMessageBox("加密失败");
	UnmapViewOfFile(m_pBuff);
	CloseHandle(m_hFileMap);

	return 0;
}

同时修改文件的依赖项

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最后生成顺序为

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将SDL设置为否

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当有的文件权限不够无法加密时 在属性页中可以修改权限

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获取文件地址后 开始加密的过程

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HANDLE hFile = CreateFile(pFilePath,   //获取句柄
    GENERIC_READ|GENERIC_WRITE,
    0, NULL,
    OPEN_EXISTING,
    FILE_ATTRIBUTE_NORMAL,
    NULL
);
if (hFile == INVALID_HANDLE_VALUE) {
    UnmapViewOfFile(pViewBuff);
    CloseHandle(hFileMap);
    SendMessage(hWndUi, MM_ENCRIPTFAILD, NULL, NULL);
    return 0;
}

ULONGLONG nFileSize = 0;
GetFileSizeEx(hFile, (PLARGE_INTEGER)&nFileSize);
const DWORD dwBlockSize = 0x100000;//每次处理1M

LPBYTE PData = new BYTE[dwBlockSize];//数组为局部对象 只能填常量值 所以加const
ULONGLONG dwBytesHandled = 0;
while (dwBytesHandled < nFileSize) {
    //读取
    DWORD dwBytesReaded = 0;
    if (!ReadFile(hFile, PData, dwBlockSize, &dwBytesReaded, NULL)) {
        CloseHandle(hFile);
        UnmapViewOfFile(pViewBuff);
        CloseHandle(hFileMap);
        SendMessage(hWndUi, MM_ENCRIPTFAILD, NULL, NULL);
        return 0;
    }

    //加密
    for (DWORD i = 0; i < dwBytesReaded; i++) {
        PData[i] ^= 0x55;
    }

    //移动回文件指针
    SetFilePointerEx(hFile, *(PLARGE_INTEGER) & dwBytesHandled, NULL, FILE_BEGIN);
    //写回文件
    DWORD dwBytesWrited = 0;
    if (!WriteFile(hFile, PData, dwBytesReaded, &dwBytesWrited, NULL)) {
        CloseHandle(hFile);
        UnmapViewOfFile(pViewBuff);
        CloseHandle(hFileMap);
        SendMessage(hWndUi, MM_ENCRIPTFAILD, NULL, NULL);
        return 0;
    }
    //记录处理过的字节数
    dwBytesHandled += dwBytesReaded;
    //发送消息通知
    DWORD dwPercent =(double)dwBytesHandled * 100 / nFileSize;
    g_dwPos = dwPercent;
    //SendMessage(hWndUi, MM_PERCENT, (WPARAM)dwPercent, NULL);
}

设置加密进度的显示

EncriyptUIDlg.cpp：

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afx_msg LRESULT CEncriyptUIDlg::OnMmPercent(WPARAM wParam, LPARAM lParam)
{
	m_pcPercent.SetPos(wParam);
	CString StrFmt;
	StrFmt.Format("%d%%", wParam);
	SetDlgItemText(LBL_PERCENT, StrFmt);
	return 0;
}

在类向导中添加消息

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同时将MYMSG中添加消息（所有出现的地方都添加）

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enum MYMSG
{
    MM_ENCRIPTFAILD = WM_USER + 1
    MM_PERCENT
};

添加控制百分比的变量

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设置一个定时器

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//添加
#pragma data_seg("EncryptValue")
CHAR g_szFilePath[MAX_PATH] = {};
DWORD g_dwPos = 0;//添加
#pragma data_seg()

common.h：

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//添加
extern COMMONAPI CHAR g_szFilePath[MAX_PATH];
extern COMMONAPI DWORD g_dwPos;//添加
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//在加密按钮的定义中添加
SetTimer(1, 100, NULL);

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void CEncriyptUIDlg::OnTimer(UINT_PTR nIDEvent)
{
	// TODO: 在此添加消息处理程序代码和/或调用默认值
	if (nIDEvent == 1) {
		m_pcPercent.SetPos(g_dwPos);
		CString StrFmt;
		StrFmt.Format("%d%%", g_dwPos);
		SetDlgItemText(LBL_PERCENT, StrFmt);
	}
	CDialogEx::OnTimer(nIDEvent);
}

work.cpp（全部代码）：

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// Work.cpp : 此文件包含 "main" 函数。程序执行将在此处开始并结束。
//

#include <iostream>
#include "../DllCommon/common.h"
#pragma comment(lib,"../EncriyptUI/x64/debug/dllcommon.lib")
enum MYMSG
{
    MM_ENCRIPTFAILD = WM_USER + 1,
    MM_PERCENT
};
int main(int argc, char** argv)
{
    getchar();

    
    //判断
    /*if (argc < 2) {
        return 0;
    }*/
    HWND hWndUi = FindWindow(NULL, "UI");
    if (hWndUi == NULL) {
        return 0;
    }
    //char* pFilePath = argv[1];//文件路径
    HANDLE hFileMap = OpenFileMapping(FILE_MAP_READ | FILE_MAP_WRITE,
        FALSE,
        "EncryptShared");

    if (hFileMap == NULL) {
        SendMessage(hWndUi, MM_ENCRIPTFAILD,NULL,NULL);
        return 0;
    }
    LPVOID pViewBuff = MapViewOfFile(hFileMap, FILE_MAP_READ | FILE_MAP_WRITE,
        0, 0,
        0x1000);
    if (pViewBuff == NULL) {
        CloseHandle(hFileMap);
        SendMessage(hWndUi, MM_ENCRIPTFAILD, NULL, NULL);
        return 0;
    }

    char* pFilePath = (char*)pViewBuff;

    HANDLE hFile = CreateFile(pFilePath,
        GENERIC_READ|GENERIC_WRITE,
        0, NULL,
        OPEN_EXISTING,
        FILE_ATTRIBUTE_NORMAL,
        NULL
    );
    if (hFile == INVALID_HANDLE_VALUE) {
        UnmapViewOfFile(pViewBuff);
        CloseHandle(hFileMap);
        SendMessage(hWndUi, MM_ENCRIPTFAILD, NULL, NULL);
        return 0;
    }

    ULONGLONG nFileSize = 0;
    GetFileSizeEx(hFile, (PLARGE_INTEGER)&nFileSize);
    const DWORD dwBlockSize = 0x100000;//每次处理1M

    LPBYTE PData = new BYTE[dwBlockSize];//数组为局部对象 只能填常量值 所以加const
    ULONGLONG dwBytesHandled = 0;
    while (dwBytesHandled < nFileSize) {
        //读取
        DWORD dwBytesReaded = 0;
        if (!ReadFile(hFile, PData, dwBlockSize, &dwBytesReaded, NULL)) {
            CloseHandle(hFile);
            UnmapViewOfFile(pViewBuff);
            CloseHandle(hFileMap);
            SendMessage(hWndUi, MM_ENCRIPTFAILD, NULL, NULL);
            return 0;
        }

        //加密
        for (DWORD i = 0; i < dwBytesReaded; i++) {
            PData[i] ^= 0x55;
        }

        //移动回文件指针
        SetFilePointerEx(hFile, *(PLARGE_INTEGER) & dwBytesHandled, NULL, FILE_BEGIN);
        //写回文件
        DWORD dwBytesWrited = 0;
        if (!WriteFile(hFile, PData, dwBytesReaded, &dwBytesWrited, NULL)) {
            CloseHandle(hFile);
            UnmapViewOfFile(pViewBuff);
            CloseHandle(hFileMap);
            SendMessage(hWndUi, MM_ENCRIPTFAILD, NULL, NULL);
            return 0;
        }
        //记录处理过的字节数
        dwBytesHandled += dwBytesReaded;
        //发送消息通知
        DWORD dwPercent =(double)dwBytesHandled * 100 / nFileSize;
        g_dwPos = dwPercent;
        //SendMessage(hWndUi, MM_PERCENT, (WPARAM)dwPercent, NULL);
    }


    CloseHandle(hFile);
    UnmapViewOfFile(pViewBuff);
    CloseHandle(hFileMap);
    return 0;
}

EncriyptUIDlg.cpp（全部代码）：

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// EncriyptUIDlg.cpp: 实现文件
//

#include "pch.h"
#include "framework.h"
#include "EncriyptUI.h"
#include "EncriyptUIDlg.h"
#include "afxdialogex.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#endif


// 用于应用程序“关于”菜单项的 CAboutDlg 对话框

class CAboutDlg : public CDialogEx
{
public:
	CAboutDlg();

	// 对话框数据
#ifdef AFX_DESIGN_TIME
	enum { IDD = IDD_ABOUTBOX };
#endif

protected:
	virtual void DoDataExchange(CDataExchange* pDX);    // DDX/DDV 支持

	// 实现
protected:
	DECLARE_MESSAGE_MAP()
};

CAboutDlg::CAboutDlg() : CDialogEx(IDD_ABOUTBOX)
{
}

void CAboutDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialogEx::DoDataExchange(pDX);
}

BEGIN_MESSAGE_MAP(CAboutDlg, CDialogEx)
END_MESSAGE_MAP()


// CEncriyptUIDlg 对话框



CEncriyptUIDlg::CEncriyptUIDlg(CWnd* pParent /*=nullptr*/)
	: CDialogEx(IDD_ENCRIYPTUI_DIALOG, pParent)
{
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

void CEncriyptUIDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialogEx::DoDataExchange(pDX);
	DDX_Control(pDX, IDC_PROGRESS1, m_pcPercent);
}

BEGIN_MESSAGE_MAP(CEncriyptUIDlg, CDialogEx)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_BN_CLICKED(EDT_ENCRYPT, &CEncriyptUIDlg::OnBnClickedEncrypt)
	ON_MESSAGE(MM_ENCRIPTFAILD, &CEncriyptUIDlg::OnMmEncriptfaild)
	ON_MESSAGE(MM_PERCENT, &CEncriyptUIDlg::OnMmPercent)
	ON_WM_TIMER()
END_MESSAGE_MAP()


// CEncriyptUIDlg 消息处理程序

BOOL CEncriyptUIDlg::OnInitDialog()
{
	CDialogEx::OnInitDialog();

	// 将“关于...”菜单项添加到系统菜单中。

	// IDM_ABOUTBOX 必须在系统命令范围内。
	ASSERT((IDM_ABOUTBOX & 0xFFF0) == IDM_ABOUTBOX);
	ASSERT(IDM_ABOUTBOX < 0xF000);

	CMenu* pSysMenu = GetSystemMenu(FALSE);
	if (pSysMenu != nullptr)
	{
		BOOL bNameValid;
		CString strAboutMenu;
		bNameValid = strAboutMenu.LoadString(IDS_ABOUTBOX);
		ASSERT(bNameValid);
		if (!strAboutMenu.IsEmpty())
		{
			pSysMenu->AppendMenu(MF_SEPARATOR);
			pSysMenu->AppendMenu(MF_STRING, IDM_ABOUTBOX, strAboutMenu);
		}
	}

	// 设置此对话框的图标。  当应用程序主窗口不是对话框时，框架将自动
	//  执行此操作
	SetIcon(m_hIcon, TRUE);			// 设置大图标
	SetIcon(m_hIcon, FALSE);		// 设置小图标

	// TODO: 在此添加额外的初始化代码
	m_pcPercent.SetRange(0, 100);
	m_pcPercent.SetPos(0);
	return TRUE;  // 除非将焦点设置到控件，否则返回 TRUE
}

void CEncriyptUIDlg::OnSysCommand(UINT nID, LPARAM lParam)
{
	if ((nID & 0xFFF0) == IDM_ABOUTBOX)
	{
		CAboutDlg dlgAbout;
		dlgAbout.DoModal();
	}
	else
	{
		CDialogEx::OnSysCommand(nID, lParam);
	}
}

// 如果向对话框添加最小化按钮，则需要下面的代码
//  来绘制该图标。  对于使用文档/视图模型的 MFC 应用程序，
//  这将由框架自动完成。

void CEncriyptUIDlg::OnPaint()
{
	if (IsIconic())
	{
		CPaintDC dc(this); // 用于绘制的设备上下文

		SendMessage(WM_ICONERASEBKGND, reinterpret_cast<WPARAM>(dc.GetSafeHdc()), 0);

		// 使图标在工作区矩形中居中
		int cxIcon = GetSystemMetrics(SM_CXICON);
		int cyIcon = GetSystemMetrics(SM_CYICON);
		CRect rect;
		GetClientRect(&rect);
		int x = (rect.Width() - cxIcon + 1) / 2;
		int y = (rect.Height() - cyIcon + 1) / 2;

		// 绘制图标
		dc.DrawIcon(x, y, m_hIcon);
	}
	else
	{
		CDialogEx::OnPaint();
	}
}

//当用户拖动最小化窗口时系统调用此函数取得光标
//显示。
HCURSOR CEncriyptUIDlg::OnQueryDragIcon()
{
	return static_cast<HCURSOR>(m_hIcon);
}



void CEncriyptUIDlg::OnBnClickedEncrypt()
{
	// TODO: 在此添加控件通知处理程序代码
	CString strFilePath;
	GetDlgItemText(EDT_FILEPATH, strFilePath);
	if (strFilePath.IsEmpty()) {
		AfxMessageBox("路径不能为空");
		return;
	}
	//启动工作进程
#if 0
	STARTUPINFO si = { sizeof(si) };
	PROCESS_INFORMATION pi = {};
	CString strCmdLine("Wrok.exe " + strFilePath + "\"");
	BOOL bRet = CreateProcess(NULL,
		strCmdLine.GetBuffer(),
		NULL,
		NULL,
		FALSE,
		0,
		NULL,
		NULL,
		&si,
		&pi);
	if (!bRet) {
		AfxMessageBox("启动工作进程失败，请重试！");
		return;
	}
	CloseHandle(pi.hProcess);
	CloseHandle(pi.hThread);
#endif // 使用命令行参数传入文件路径
	//使用dll共享段传入文件路径
	//strcpy_s(g_szFilePath, strFilePath.GetBuffer());
	//使用文件映射传入路径
	m_hFileMap = CreateFileMapping(
		INVALID_HANDLE_VALUE,
		NULL,
		PAGE_READWRITE,
		0, 0x1000,
		"EncryptShared"
	);
	if (m_hFileMap == NULL) {
		AfxMessageBox("无法创建文件映射对象");
		return;
	}
	m_pBuff = MapViewOfFile(m_hFileMap,
		FILE_MAP_READ | FILE_MAP_WRITE,
		0, 0, 0x1000
	);

	if (m_pBuff == NULL) {
		CloseHandle(m_hFileMap);
		AfxMessageBox("无法映射内存");
		return;
	}

	strcpy_s((char*)m_pBuff, strFilePath.GetLength(), strFilePath.GetBuffer());


	STARTUPINFO si = { sizeof(si) };
	PROCESS_INFORMATION pi = {};
	CString strCmdLine("Work.exe " + strFilePath + "\"");
	BOOL bRet = CreateProcess(NULL,
		"Work.exe",
		NULL,
		NULL,
		FALSE,
		0,
		NULL,
		NULL,
		&si,
		&pi);
	if (!bRet) {
		AfxMessageBox("启动工作进程失败，请重试！");
		return;
	}
	CloseHandle(pi.hProcess);
	CloseHandle(pi.hThread);

	m_pcPercent.SetPos(0);
	SetTimer(1, 100, NULL);
}


afx_msg LRESULT CEncriyptUIDlg::OnMmEncriptfaild(WPARAM wParam, LPARAM lParam)
{
	AfxMessageBox("加密失败");
	UnmapViewOfFile(m_pBuff);
	CloseHandle(m_hFileMap);

	return 0;
}


afx_msg LRESULT CEncriyptUIDlg::OnMmPercent(WPARAM wParam, LPARAM lParam)
{
	m_pcPercent.SetPos(wParam);
	CString StrFmt;
	StrFmt.Format("%d%%", wParam);
	SetDlgItemText(LBL_PERCENT, StrFmt);
	return 0;
}


void CEncriyptUIDlg::OnTimer(UINT_PTR nIDEvent)
{
	// TODO: 在此添加消息处理程序代码和/或调用默认值
	if (nIDEvent == 1) {
		m_pcPercent.SetPos(g_dwPos);
		CString StrFmt;
		StrFmt.Format("%d%%", g_dwPos);
		SetDlgItemText(LBL_PERCENT, StrFmt);
	}

	CDialogEx::OnTimer(nIDEvent);
}