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AddAccessAllowedObjectAce function

The AddAccessAllowedObjectAce function adds an access-allowed access control entry (ACE) to the end of a discretionary access control list (DACL). The new ACE can grant access to an object, or to a property set or property on an object. You can also use AddAccessAllowedObjectAce to add an ACE that only a specified type of child object can inherit.

Syntax


BOOL WINAPI AddAccessAllowedObjectAce(
  _Inout_   PACL pAcl,
  _In_      DWORD dwAceRevision,
  _In_      DWORD AceFlags,
  _In_      DWORD AccessMask,
  _In_opt_  GUID *ObjectTypeGuid,
  _In_opt_  GUID *InheritedObjectTypeGuid,
  _In_      PSID pSid
);

Parameters

pAcl [in, out]

A pointer to a DACL. The AddAccessAllowedObjectAce function adds an access-allowed ACE to the end of this DACL. The ACE is in the form of an ACCESS_ALLOWED_OBJECT_ACE structure.

dwAceRevision [in]

Specifies the revision level of the DACL being modified. This value must be ACL_REVISION_DS. If the DACL's revision level is lower than ACL_REVISION_DS, the function changes it to ACL_REVISION_DS.

AceFlags [in]

A set of bit flags that control ACE inheritance. The function sets these flags in the AceFlags member of the ACE_HEADER structure of the new ACE. This parameter can be a combination of the following values.

ValueMeaning
CONTAINER_INHERIT_ACE

The ACE is inherited by container objects.

INHERIT_ONLY_ACE

The ACE does not apply to the object to which the access control list (ACL) is assigned, but it can be inherited by child objects.

INHERITED_ACE

Indicates an inherited ACE. This flag allows operations that change the security on a tree of objects to modify inherited ACEs, while not changing ACEs that were directly applied to the object.

NO_PROPAGATE_INHERIT_ACE

The OBJECT_INHERIT_ACE and CONTAINER_INHERIT_ACE bits are not propagated to an inherited ACE.

OBJECT_INHERIT_ACE

The ACE is inherited by noncontainer objects.

 

AccessMask [in]

A set of bit flags that use the ACCESS_MASK format. These flags specify the access rights that the new ACE allows for the specified security identifier (SID).

ObjectTypeGuid [in, optional]

A pointer to a GUID structure that identifies the type of object, property set, or property protected by the new ACE. If this parameter is NULL, the new ACE protects the object to which the DACL is assigned.

InheritedObjectTypeGuid [in, optional]

A pointer to a GUID structure that identifies the type of object that can inherit the new ACE. If this parameter is non-NULL, only the specified object type can inherit the ACE. If NULL, any type of child object can inherit the ACE. In either case, inheritance is also controlled by the value of the AceFlags parameter, as well as by any protection against inheritance placed on the child objects.

pSid [in]

A pointer to a SID that identifies the user, group, or logon session to which the new ACE allows access.

Return value

If the function succeeds, the return value is nonzero.

If the function fails, the return value is zero. To get extended error information, call GetLastError. The following are possible error values.

Return codeDescription
ERROR_ALLOTTED_SPACE_EXCEEDED

The new ACE does not fit into the ACL. A larger ACL buffer is required.

ERROR_INVALID_ACL

The specified ACL is not properly formed.

ERROR_INVALID_FLAGS

The AceFlags parameter is not valid.

ERROR_INVALID_SID

The specified SID is not structurally valid.

ERROR_REVISION_MISMATCH

The specified revision is not known or is incompatible with that of the ACL.

ERROR_SUCCESS

The ACE was successfully added.

 

Remarks

If both ObjectTypeGuid and InheritedObjectTypeGuid are NULL, use the AddAccessAllowedAceEx function rather than AddAccessAllowedObjectAce. This is suggested because an ACCESS_ALLOWED_ACE is smaller and more efficient than an ACCESS_ALLOWED_OBJECT_ACE.

The caller must ensure that ACEs are added to the DACL in the correct order. For more information, see Order of ACEs in a DACL.

Requirements

Minimum supported client

Windows XP [desktop apps only]

Minimum supported server

Windows Server 2003 [desktop apps only]

Header

Winbase.h (include Windows.h)

Library

Advapi32.lib

DLL

Advapi32.dll

See also

Low-level Access Control
Low-level Access Control Functions
ACCESS_ALLOWED_ACE
ACCESS_ALLOWED_OBJECT_ACE
ACCESS_MASK
ACE_HEADER
ACL
AddAccessAllowedAceEx
AddAccessDeniedObjectAce
AddAuditAccessObjectAce
GUID

 

 

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