Question

我正在尝试获取文件的所有权并通过C＃删除它。该文件是iexplorer.exe，默认为当前所有者 - TrustedInstaller。 FileSecurity.SetOwner方法似乎设置了指定的所有权，但实际上并没有更改初始所有者并且不会抛出任何异常。显然，下一次删除文件的尝试会引发异常。在代码中应该更改什么才能获取文件的所有权并将其删除？

var fileS = File.GetAccessControl(@"C:\Program Files (x86)\Internet Explorer\iexplore.exe");
fileS.SetOwner(new System.Security.Principal.NTAccount(Environment.UserDomainName, Environment.UserName));
File.Delete(@"C:\Program Files (x86)\Internet Explorer\iexplore.exe");

Answer 1

您必须明确启用SeTakeOwnershipPrivilege：

必须在未被授予的情况下获取对象的所有权自行决定访问。此权限允许设置所有者值只有持有人可以合法地指定为的那些值对象的所有者。用户权限：获取文件或其他所有权对象。

我建议你阅读Mark Novak撰写的精彩文章：Manipulate Privileges in Managed Code Reliably, Securely, and Efficiently。

和/或看看他的sample。

<强>更新

使用示例：

var fileS = File.GetAccessControl(@"C:\Program Files (x86)\Internet Explorer\iexplore.exe");

Privilege p;
bool ownerChanged = false;
try
{
    p = new Privilege(Privilege.TakeOwnership);
    p.Enable();

    fileS.SetOwner(new System.Security.Principal.NTAccount(
        Environment.UserDomainName, Environment.UserName));

    ownerChanged = true;
}
catch(PrivilegeNotHeldException e)
{
   // privilege not held
   // TODO: show an error message, write logs, etc.
}
finally
{
    p.Revert();
}

if (ownerChanged)
    File.Delete(@"C:\Program Files (x86)\Internet Explorer\iexplore.exe");

Answer 2

        string filepath = @"C:\Program Files (x86)\Internet Explorer\iexplore.exe";

        //Get Currently Applied Access Control
        FileSecurity fileS = File.GetAccessControl(filepath);

        //Update it, Grant Current User Full Control
        SecurityIdentifier cu = WindowsIdentity.GetCurrent().User;
        fileS.SetOwner(cu);
        fileS.SetAccessRule(new FileSystemAccessRule(cu, FileSystemRights.FullControl, AccessControlType.Allow));

        //Update the Access Control on the File
        File.SetAccessControl(filepath, fileS);

        //Delete the file
        File.Delete(filepath);

添加以下导入

        using System.IO;
        using System.Security.AccessControl;
        using System.Security.Principal;

以高架模式运行代码。

Answer 3

使用示例中的类权限在Windows 8.1中提供支持： Manipulate Privileges in Managed Code Reliably, Securely, and Efficiently

    private bool TryDeleteFile(string fileName)
    {
        string filePath = Path.GetFullPath(fileName);
        var fi = new FileInfo(filePath);

        bool ownerChanged = false;
        bool accessChanged = false;
        bool isDelete = false;

        FileSecurity fs = fi.GetAccessControl();
        Privilege p = new Privilege(Privilege.TakeOwnership);

        try
        {
            p.Enable();
            fs.SetOwner(WindowsIdentity.GetCurrent().User);
            File.SetAccessControl(filePath, fs); //Update the Access Control on the File
            ownerChanged = true;
        }
        catch (PrivilegeNotHeldException ex) { }
        finally { p.Revert(); }

        try
        {
            fs.SetAccessRule(new FileSystemAccessRule(WindowsIdentity.GetCurrent().User, FileSystemRights.FullControl, AccessControlType.Allow));
            File.SetAccessControl(filePath, fs);
            accessChanged = true;
        }
        catch (UnauthorizedAccessException  ex) { }

        if (ownerChanged && accessChanged)
        {
            try
            {
                fi.Delete();
                isDelete = true;
            }
            catch (Exception ex) {  }
        }

        return isDelete;
    }

Answer 4

请参阅这些注册表项以添加上下文菜单。我能够在Windows 7上重命名该文件夹以及iexplorer_OFF.exe。您可能可以从代码中执行Shell /执行操作。

https://www.howtogeek.com/howto/windows-vista/add-take-ownership-to-explorer-right-click-menu-in-vista/

取得文件的所有权c＃

4 个答案: