如何更新现有的共享文件夹属性？

Question

我想使用COM Api或WMI更改共享文件夹中的"启用基于访问的枚举","允许共享缓存"和"加密数据访问"属性.

我以前Win32_Share用来创建共享,但是没有属性来分配这些属性.但后来我开始了解' MSFT_SmbShare'课堂,但我只能看到CreateShare方法.我是在退出共享时启用/禁用这些标志但无法找到任何UpdateShare方法.

MSFT_SmbShare类

请建议一种方法,通过COM API或WMI中的任何一个在共享上切换这些标志.

Answer 1

要更改这些设置,可以使用Windows SDK中提供的级别为1005 的NetShareSetInfo函数.

此处定义了所有标志,但请注意文档中没有显示SHI1005_FLAGS_ENCRYPT_DATA(0x08000),这确实位于相应的Windows头文件LMERR.H中.

这是一个演示如何在C#控制台应用程序中使用它的示例:

class Program
{
    static void Main(string[] args)
    {
        // get flags of "myshare" share
        var flags = NetShareUtilities.Get1005Flags(null, "myshare");

        // add the "Require encryption" flag
        flags |= SHI1005_FLAGS.SHI1005_FLAGS_ENCRYPT_DATA;

        // save flags (you'll need to have admin rights for this)
        NetShareUtilities.Set1005Flags(null, "myshare", flags);
    }
}

以下是使用P/Invoke访问Windows API的NetShareUtilities类:

public static class NetShareUtilities
{
    [DllImport("netapi32.dll")]
    private extern static int NetShareSetInfo([MarshalAs(UnmanagedType.LPWStr)] string servername, [MarshalAs(UnmanagedType.LPWStr)] string netname, int level, ref SHI1005_FLAGS buf, IntPtr parm_err);

    [DllImport("netapi32.dll")]
    private extern static int NetShareGetInfo([MarshalAs(UnmanagedType.LPWStr)] string servername, [MarshalAs(UnmanagedType.LPWStr)] string netname, int level, out IntPtr bufptr);

    [DllImport("netapi32.dll")]
    private static extern IntPtr NetApiBufferFree(IntPtr Buffer);

    public static SHI1005_FLAGS Get1005Flags(string serverName, string name)
    {
        IntPtr ptr;
        int err = NetShareGetInfo(serverName, name, 1005, out ptr);
        if (err != 0)
            throw new Win32Exception(err);

        var flags = (SHI1005_FLAGS)Marshal.ReadInt32(ptr);
        NetApiBufferFree(ptr);
        return flags;
    }

    public static void Set1005Flags(string serverName, string name, SHI1005_FLAGS flags)
    {
        // note: you need to have enough rights to call this
        int err = NetShareSetInfo(serverName, name, 1005, ref flags, IntPtr.Zero);
        if (err != 0)
            throw new Win32Exception(err);
    }
}

[Flags]
public enum SHI1005_FLAGS
{
    // note: all values are taken from LMERR.H
    SHI1005_FLAGS_DFS = 0x0001,
    SHI1005_FLAGS_DFS_ROOT = 0x0002,

    // these 3 ones are not strict flags, you'll need to use a mask as specified in the official documentation
    CSC_CACHE_AUTO_REINT = 0x0010,
    CSC_CACHE_VDO = 0x0020,
    CSC_CACHE_NONE = 0x0030,

    SHI1005_FLAGS_RESTRICT_EXCLUSIVE_OPENS = 0x00100,
    SHI1005_FLAGS_FORCE_SHARED_DELETE = 0x00200,
    SHI1005_FLAGS_ALLOW_NAMESPACE_CACHING = 0x00400,
    SHI1005_FLAGS_ACCESS_BASED_DIRECTORY_ENUM = 0x00800,
    SHI1005_FLAGS_FORCE_LEVELII_OPLOCK = 0x01000,
    SHI1005_FLAGS_ENABLE_HASH = 0x02000,
    SHI1005_FLAGS_ENABLE_CA = 0x04000,
    SHI1005_FLAGS_ENCRYPT_DATA = 0x08000,
    SHI1005_FLAGS_RESERVED = 0x10000,
}

Answer 2

这些值似乎都是\xc2\xa0MSFT_SmbShare类的属性；具体来说，\xc2\ xa0FolderEnumerationMode和CachingMode.EncryptData

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更新值后，使用Put_方法进行更新。

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