TreeSetNamedSecurityInfoW function (aclapi.h)

Article
02/09/2023

The TreeSetNamedSecurityInfo function sets specified security information in the security descriptor of a specified tree of objects. This function allows a specified discretionary access control list (DACL) or any elements in the system access control list (SACL) to be propagated throughout an entire tree. This function supports a callback function to track the progress of the tree operation.

Syntax

DWORD TreeSetNamedSecurityInfoW(
  [in]           LPWSTR               pObjectName,
  [in]           SE_OBJECT_TYPE       ObjectType,
  [in]           SECURITY_INFORMATION SecurityInfo,
  [in, optional] PSID                 pOwner,
  [in, optional] PSID                 pGroup,
  [in, optional] PACL                 pDacl,
  [in, optional] PACL                 pSacl,
  [in]           DWORD                dwAction,
  [in]           FN_PROGRESS          fnProgress,
  [in]           PROG_INVOKE_SETTING  ProgressInvokeSetting,
  [in, optional] PVOID                Args
);

Parameters

[in] pObjectName

Pointer to a null-terminated string that specifies the name of the root node object for the objects that are to receive updated security information. Supported objects are registry keys and file objects. For descriptions of the string formats for the different object types, see SE_OBJECT_TYPE.

[in] ObjectType

A value of the SE_OBJECT_TYPE enumeration that indicates the type of object named by the pObjectName parameter. The supported values are SE_REGISTRY_KEY and SE_FILE_OBJECT, for registry keys and file objects, respectively.

[in] SecurityInfo

A set of bit flags that indicate the type of security information to set. This parameter can be a combination of the SECURITY_INFORMATION bit flags.

[in, optional] pOwner

A pointer to a SID structure that identifies the owner of the object. The SID must be one that can be assigned as the owner SID of a security descriptor. The SecurityInfo parameter must include the OWNER_SECURITY_INFORMATION flag. To set the owner, the caller must have WRITE_OWNER access to each object, including the root object. If you are not setting the owner SID, this parameter can be NULL.

[in, optional] pGroup

A pointer to a SID structure that identifies the primary group of the object. The SecurityInfo parameter must include the GROUP_SECURITY_INFORMATION flag. To set the group, the caller must have WRITE_OWNER access to each object, including the root object. If you are not setting the primary group SID, this parameter can be NULL.

[in, optional] pDacl

A pointer to an access control list (ACL) structure that represents the new DACL for the objects being reset. The SecurityInfo parameter must include the DACL_SECURITY_INFORMATION flag. The caller must have READ_CONTROL and WRITE_DAC access to each object, including the root object. If you are not setting the DACL, this parameter can be NULL.

[in, optional] pSacl

A pointer to an ACL structure that represents the new SACL for the objects being reset. The SecurityInfo parameter must include any of the following flags: SACL_SECURITY_INFORMATION, LABEL_SECURITY_INFORMATION, ATTRIBUTE_SECURITY_INFORMATION, SCOPE_SECURITY_INFORMATION, or BACKUP_SECURITY_INFORMATION. If setting SACL_SECURITY_INFORMATION or SCOPE_SECURITY_INFORMATION, the caller must have the SE_SECURITY_NAME privilege enabled. If you are not setting the SACL, this parameter can be NULL.

[in] dwAction

Specifies the behavior of this function. This must be set to one of the following values, defined in AccCtrl.h.

Value	Meaning
TREE_SEC_INFO_SET 0x00000001	The security information is set on the object specified by the pObjectName parameter and the tree of child objects of that object. If ACLs are specified in either the pDacl or pSacl parameters, the security descriptors are associated with the object. The security descriptors are propagated to the tree of child objects based on their inheritance properties.
TREE_SEC_INFO_RESET 0x00000002	The security information is reset on the object specified by the pObjectName parameter and the tree of child objects of that object. Any existing security information is removed from all objects on the tree. If any object in the tree does not grant appropriate permissions to the caller to modify the security descriptor on the object, then the propagation of security information on that particular node of the tree and its objects is skipped. The operation continues on the rest of the tree under the object specified by the pObjectName parameter.
TREE_SEC_INFO_RESET_KEEP_EXPLICIT 0x00000003	The security information is reset on the object specified by the pObjectName parameter and the tree of child objects of that object. Any existing inherited security information is removed from all objects on the tree. Security information that was explicitly set on objects in the tree is unchanged. If any object in the tree does not grant appropriate permissions to the caller to modify the security descriptor on the object, then the propagation of security information on that particular node of the tree and its objects is skipped. The operation continues on the rest of the tree under the object specified by the pObjectName parameter.

[in] fnProgress

A pointer to the function used to track the progress of the TreeSetNamedSecurityInfo function. The prototype of the progress function is:

#include <windows.h>
#include <Aclapi.h>
#pragma comment(lib, "Advapi32.lib")

typedef VOID (*FN_PROGRESS) (
  IN LPWSTR pObjectName,              // Name of object just processed
  IN DWORD Status,                    // Status of operation on object
  IN OUT PPROG_INVOKE_SETTING
                      pInvokeSetting, // When to set
  IN PVOID Args,                      // Caller specific data
  IN BOOL SecuritySet                 // Whether security was set
);

The progress function provides the caller with progress and error information when nodes are processed. The caller specifies the progress function in fnProgress, and during the tree operation, TreeSetNamedSecurityInfo passes the name of the last object processed, the error status of that operation, and the current PROG_INVOKE_SETTING value. The caller can change the PROG_INVOKE_SETTING value by using pInvokeSetting.

If no progress function is to be used, set this parameter to NULL.

[in] ProgressInvokeSetting

A value of the PROG_INVOKE_SETTING enumeration that specifies the initial setting for the progress function.

[in, optional] Args

A pointer to a VOID for progress function arguments specified by the caller.

Return value

If the function succeeds, the function returns ERROR_SUCCESS.

If the function fails, it returns an error code defined in WinError.h.

Remarks

Setting a NULL owner, group, DACL, or SACL is not supported by this function.

If the caller does not contain the proper privileges and permissions to support the requested owner, group, DACL, and SACL updates, then none of the updates is performed.

This function provides the same functionality as the SetNamedSecurityInfo function when the value of the dwAction parameter is set to TREE_SEC_INFO_SET, the value of the ProgressInvokeSetting parameter is set to ProgressInvokePrePostError, and the function pointed to by the fnProgress parameter sets the value of its pInvokeSetting parameter to ProgressInvokePrePostError.

This function is similar to the TreeResetNamedSecurityInfo function:

If the dwAction parameter of TreeSetNamedSecurityInfo is set to TREE_SEC_INFO_RESET_KEEP_EXPLICIT, then the function is equivalent to TreeResetNamedSecurityInfo with the KeepExplicit parameter set to TRUE.
If the dwAction parameter of TreeSetNamedSecurityInfo is set to TREE_SEC_INFO_RESET, then the function is equivalent to TreeResetNamedSecurityInfo with the KeepExplicit parameter set to FALSE.

Note

The aclapi.h header defines TreeSetNamedSecurityInfo as an alias which automatically selects the ANSI or Unicode version of this function based on the definition of the UNICODE preprocessor constant. Mixing usage of the encoding-neutral alias with code that not encoding-neutral can lead to mismatches that result in compilation or runtime errors. For more information, see Conventions for Function Prototypes.

Requirements

Requirement	Value
Minimum supported client	Windows Vista [desktop apps only]
Minimum supported server	Windows Server 2008 [desktop apps only]
Target Platform	Windows
Header	aclapi.h
Library	Advapi32.lib
DLL	Advapi32.dll

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