GetEffectiveRightsFromAcl 抛出无效的 acl 错误

发布于 2024-09-06 19:33:20 字数 1531 浏览 0 评论 0原文

我正在尝试使用 C# 中的互操作来获取用户对文件的有效权限。以下是我正在使用的代码:

        public static FileSystemRights GetFileEffectiveRights(string FileName, string UserName)
    {
        IntPtr pDacl, pZero = IntPtr.Zero;
        int Mask = 0;
        uint errorReturn = GetNamedSecurityInfo(FileName, SE_OBJECT_TYPE.SE_FILE_OBJECT, SECURITY_INFORMATION.Dacl
            , out pZero, out pZero, out pDacl, out pZero, out pZero);
        if (errorReturn != 0)
        {
            throw new Exception("Win error : " + errorReturn);
        }
        Program.TRUSTEE pTrustee = new TRUSTEE();
        pTrustee.pMultipleTrustee = IntPtr.Zero;
        pTrustee.MultipleTrusteeOperation = (int)Program.MULTIPLE_TRUSTEE_OPERATION.NO_MULTIPLE_TRUSTEE;
        pTrustee.ptstrName = UserName;
        pTrustee.TrusteeForm = (int)Program.TRUSTEE_FORM.TRUSTEE_IS_NAME;
        pTrustee.TrusteeType = (int)Program.TRUSTEE_TYPE.TRUSTEE_IS_USER;
        errorReturn = GetEffectiveRightsFromAcl(pDacl, ref pTrustee, ref Mask);
        if (errorReturn != 0)
        {
            throw new Exception("Win error : " + errorReturn);
        }
        return (FileSystemRights)Mask;
    }

此代码工作正常,直到我开始使用类 FileAccessRule 和 FileInfo 修改 ACL 结构,然后我开始收到 Windows 错误 1336:ERROR_INVALID_ACL。如果我调试进程,情况也是如此:我调用 GetFileEffectiveRights 一次,暂停进程,通过 Windows API 更改 ACL,然后恢复并再次调用 GetFileEffectiveRights(第一次调用成功,但第二次调用给出 1336。)
出了什么问题?
PS:我正在使用 VS 2008 和 .NET 3.5 在 Windows 7 上进行开发
编辑:只有当我尝试获取通过 Windows GUI/C# 的文件 API 添加了非继承 ACE 的文件的权限时,才会出现错误。

I am trying to get the effective rights a user has on a file using interop in C#. Following is the code I am using :

        public static FileSystemRights GetFileEffectiveRights(string FileName, string UserName)
    {
        IntPtr pDacl, pZero = IntPtr.Zero;
        int Mask = 0;
        uint errorReturn = GetNamedSecurityInfo(FileName, SE_OBJECT_TYPE.SE_FILE_OBJECT, SECURITY_INFORMATION.Dacl
            , out pZero, out pZero, out pDacl, out pZero, out pZero);
        if (errorReturn != 0)
        {
            throw new Exception("Win error : " + errorReturn);
        }
        Program.TRUSTEE pTrustee = new TRUSTEE();
        pTrustee.pMultipleTrustee = IntPtr.Zero;
        pTrustee.MultipleTrusteeOperation = (int)Program.MULTIPLE_TRUSTEE_OPERATION.NO_MULTIPLE_TRUSTEE;
        pTrustee.ptstrName = UserName;
        pTrustee.TrusteeForm = (int)Program.TRUSTEE_FORM.TRUSTEE_IS_NAME;
        pTrustee.TrusteeType = (int)Program.TRUSTEE_TYPE.TRUSTEE_IS_USER;
        errorReturn = GetEffectiveRightsFromAcl(pDacl, ref pTrustee, ref Mask);
        if (errorReturn != 0)
        {
            throw new Exception("Win error : " + errorReturn);
        }
        return (FileSystemRights)Mask;
    }

This code works fine until I start modifying the ACL structure using the classes FileAccessRule and FileInfo, and then I start getting Windows Error 1336 : ERROR_INVALID_ACL. Same is the case if I debug the process : I call GetFileEffectiveRights once, pause the process,change the ACL through windows API, and resume and call GetFileEffectiveRights again(the 1st call succeeds but the second gives 1336.)
What is going wrong?
PS : I am developing on Windows 7 using VS 2008 and .NET 3.5
EDIT : I only get the error when I try to get rights for a file for which a non-inherited ACE was added through the Windows GUI/ C#'s File API.

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蓝海 2024-09-13 19:33:20

问题出在问题的另一部分,即通过 Windows API 更改 ACL。

DACL 中 ACE 的顺序非常重要。例如 http://support.microsoft.com/kb/269175/en您将找到有关正确 ACE 顺序的完整说明和代码示例。

如果您仍然遇到同样的问题,只需在您的问题中发布修改 ACL 的代码示例即可。

The problem is in the other part of your problem which change the ACL through windows API.

The order of ACEs in DACL is very important. In http://support.microsoft.com/kb/269175/en for example you will find the full description about correct ACE order and a code example.

If you will stay have the same problem, just post the code example of modification of ACL in your question.

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