上位机MFC实现文件加密解密源代码

qq263946146 · 2019-9-23 11:09:58

上位机MFC实现文件加密解压功能

例程实现对指定文件或指定文件夹内的全部文件进行加密与解密功能。
效果如上图。
点击浏览文件夹或文件后，
可以输入加密文件进行加密或解密。
运行例程时，首先要通过密码登录软件

void CSecurityDlg::OnOK()
{
// TODO: Add extra validation here
static int cx=0;
if(UpdateData()==FALSE) return;
if(m_Password.Compare("wmr")) {
if(cx<2) {
MessageBox("密码错误，请重新输入 !"," 权限校验 ",MB_ICONWARNING);
cx++;
} else {
MessageBox("密码错误，您无权使用本工具 !"," 权限校验 ",MB_ICONSTOP);
CDialog::OnCancel();
}
return;
}
CDialog::OnOK();
}

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然后才是浏览要加密的文件

void CLockFileDlg::OnView()
{
// TODO: Add your control notification handler code here
if(UpdateData()==FALSE) return;
CSBDestination sb(m_hWnd,IDS_TITLE);
sb.SetFlags( BIF_RETURNONLYFSDIRS | BIF_BROWSEINCLUDEFILES /*| BIF_STATUSTEXT */);
sb.SetInitialSelection(m_FileName);
if (sb.SelectFolder()) {
m_FileName = sb.GetSelectedFolder();
UpdateData(FALSE);
OnChanged();
}
}

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最后才是执行文件的加密

typedef CList<CString,CString> CFileList;
void CLockFileDlg::LockFile(CString DirName,CString FileName,CString Password)
{
CString FindName,DispName;
CFileList FileList,DirList;
FileList.RemoveAll();
DirList.RemoveAll();
char CurDir[MAX_PATH];
GetCurrentDirectory(MAX_PATH,CurDir);
if(m_isNet || SetCurrentDirectory(DirName)==TRUE) {
if(DirName.GetLength()>(MSG_LEN-23)) {
DisplayMessage("Process directory ---- ","");
DisplayMessage(DirName,NULL);
} else DisplayMessage("Process directory ---- ",DirName);
}
CFileFind Finder;
BOOL bOK=Finder.FindFile(FileName);
if(bOK) {
while(bOK) {
bOK = Finder.FindNextFile();
if(Finder.IsDirectory()==FALSE) {
FindName=m_isNet?Finder.GetFilePath():Finder.GetFileName();
FileList.AddTail(FindName);
m_TotalFileNum++;
}
}
}
Finder.Close();
if(m_SubDirFlg) {
if(m_isNet) {
if(DirName.GetAt(DirName.GetLength()-1)!='\\') DirName+="\";
DirName+="*.*";
}
bOK=Finder.FindFile(m_isNet?DirName:"*.*");
if(bOK) {
while(bOK) {
bOK = Finder.FindNextFile();
if(Finder.IsDirectory() && Finder.IsDots()==FALSE) {
FindName=Finder.GetFilePath();
DirList.AddTail(FindName);
}
}
}
Finder.Close();
}
m_DirNum++;
HANDLE hFile;
DWORD dwFileAttr,dwNewAttr;
POSITION pos=FileList.GetHeadPosition();
if(FileList.GetCount()==0) DisplayMessage("File not found","");
else for(int i=0;i<FileList.GetCount();i++) {
FindName=FileList.GetNext(pos);
GetDispName(DispName,FindName);
DisplayMessage(DispName,NULL);
if((dwFileAttr=GetFileAttributes(FindName))!=-1) {
dwNewAttr=dwFileAttr;
if(m_Readonly) dwNewAttr &= ~FILE_ATTRIBUTE_READONLY;
if(m_Hidden) dwNewAttr &= ~FILE_ATTRIBUTE_HIDDEN | ~FILE_ATTRIBUTE_SYSTEM;
else if(dwFileAttr & (FILE_ATTRIBUTE_HIDDEN | FILE_ATTRIBUTE_SYSTEM)) dwNewAttr |= FILE_ATTRIBUTE_READONLY;
SetFileAttributes(FindName,dwNewAttr);
}
hFile=CreateFile(FindName,GENERIC_READ|GENERIC_WRITE,0,NULL,OPEN_EXISTING,FILE_ATTRIBUTE_NORMAL,NULL);
if(hFile==INVALID_HANDLE_VALUE) DisplayMessage(NULL,",Fail");
else {
DWORD nBytes,nBytesRead;
nBytes=GetFileSize(hFile,&nBytesRead);
if(nBytes>(10*1024*1024)) nBytes=10*1024*1024;
char* pBuf=new char[nBytes];
if(pBuf!=NULL) {
FILETIME tm1,tm2,tm3;
GetFileTime(hFile,&tm1,&tm2,&tm3);
if(ReadFile(hFile,pBuf,nBytes,&nBytesRead,NULL)!=FALSE && nBytesRead==nBytes) {
PassData(pBuf,nBytes,Password);
if(SetFilePointer(hFile,0,NULL,FILE_BEGIN)==0 && WriteFile(hFile,pBuf,nBytes,&nBytesRead,NULL)!=FALSE && nBytesRead==nBytes) {
DisplayMessage(NULL,",OK");
m_OkFileNum++;
} else DisplayMessage(NULL,",Fail");
} else DisplayMessage(NULL,",Fail");
SetFileTime(hFile,&tm1,&tm2,&tm3);
delete pBuf;
} else DisplayMessage(NULL,",Fail");
CloseHandle(hFile);
}
if(dwFileAttr!=-1) SetFileAttributes(FindName,dwFileAttr);
}
pos=DirList.GetHeadPosition();
for(int i=0;i<DirList.GetCount();i++) {
FindName=DirList.GetNext(pos);
if(m_isNet) {
FileName=FindName;
if(FileName.GetAt(FileName.GetLength()-1)!='\\') FileName+="\";
FileName+="*.*";
}
LockFile(FindName,FileName,Password);
}
if(m_isNet==FALSE) SetCurrentDirectory(CurDir);
}