Win32_ACE class

Artigo
05/31/2018

The Win32_ACE abstract WMI class specifies an access control entry (ACE). An ACE grants permission to execute a restricted operation, such as writing to a file or formatting a disk. An ACE that is specific to WMI allows logon, remote access, method execution, and writing to the WMI repository.

The following syntax is simplified from Managed Object Format (MOF) code and includes all of the inherited properties. Properties are listed in alphabetic order, not MOF order.

Syntax

[abstract, UUID("{8502C58A-5FBB-11D2-AAC1-006008C78BC7}"), AMENDMENT]
class Win32_ACE : __ACE
{
  uint64        TIME_CREATED;
  uint32        AccessMask;
  uint32        AceFlags;
  uint32        AceType;
  string        GuidInheritedObjectType;
  string        GuidObjectType;
  Win32_Trustee Trustee;
};

Members

The Win32_ACE class has these types of members:

Properties

Properties

The Win32_ACE class has these properties.

AccessMask

Data type: uint32
Access type: Read/write
Qualifiers: Override (AccessMask), WritePrivileges ("SeSecurityPrivilege", "SeRestorePrivilege")

Bit flags that indicate rights granted or denied to the trustee. For more information, see the Remarks section of this topic.

FILE_READ_DATA (file) or FILE_LIST_DIRECTORY (directory) (1 (0x1))

Grants the right to read data from the file. For a directory, this value grants the right to list the contents of the directory.

FILE_WRITE_DATA (file) or FILE_ADD_FILE (directory) (2 (0x2))

Grants the right to write data to the file. For a directory, this value grants the right to create a file in the directory.

FILE_APPEND_DATA (file) or FILE_ADD_SUBDIRECTORY (directory) (4 (0x4))

Grants the right to append data to the file. For a directory, this value grants the right to create a subdirectory.

FILE_READ_EA (8 (0x8))

Grants the right to read extended attributes.

FILE_WRITE_EA (16 (0x10))

Grants the right to write extended attributes.

FILE_EXECUTE (file) or FILE_TRAVERSE (directory) (32 (0x20))

Grants the right to execute a file. For a directory, the directory can be traversed.

FILE_DELETE_CHILD (64 (0x40))

Grants the right to delete a directory and all the files it contains (its children), even if the files are read-only.

FILE_READ_ATTRIBUTES (128 (0x80))

Grants the right to read file attributes.

FILE_WRITE_ATTRIBUTES (256 (0x100))

Grants the right to change file attributes.

DELETE (65536 (0x10000))

Grants delete access.

READ_CONTROL (131072 (0x20000))

Grants read access to the security descriptor and owner.

WRITE_DAC (262144 (0x40000))

Grants write access to the discretionary access control list (ACL).

WRITE_OWNER (524288 (0x80000))

Assigns the write owner.

SYNCHRONIZE (1048576 (0x100000))

Synchronizes access and allows a process to wait for an object to enter the signaled state.

AceFlags

Data type: uint32
Access type: Read/write
Qualifiers: Override (AceFlags), WritePrivileges ("SeSecurityPrivilege", "SeRestorePrivilege")

Bit flags that specify inheritance of the ACE. The the relevant permission values for AceFlags are listed below.

OBJECT_INHERIT_ACE (1 (0x1))

Noncontainer child objects inherit the ACE as an effective ACE.

For child objects that are containers, the ACE is inherited as an inherit-only ACE unless the NO_PROPAGATE_INHERIT_ACE bit flag is also set.

CONTAINER_INHERIT_ACE (2 (0x2))

Child objects that are containers, such as directories, inherit the ACE as an effective ACE. The inherited ACE is inheritable unless the NO_PROPAGATE_INHERIT_ACE bit flag is also set.

NO_PROPAGATE_INHERIT_ACE (4 (0x4))

If the ACE is inherited by a child object, the system clears the OBJECT_INHERIT_ACE and CONTAINER_INHERIT_ACE flags in the inherited ACE. This prevents the ACE from being inherited by subsequent generations of objects.

INHERIT_ONLY_ACE (8 (0x8))

Indicates an inherit-only ACE which does not control access to the object to which it is attached. If this flag is not set, the ACE is an effective ACE which controls access to the object to which it is attached.

Both effective and inherit-only ACEs can be inherited depending on the state of the other inheritance flags.

INHERITED_ACE (16 (0x10))

The system sets this bit when it propagates an inherited ACE to a child object.

The two possible values for AceFlags that pertain only to an ACE contained within a system access control list (SACL) are listed below.

SUCCESSFUL_ACCESS_ACE_FLAG (64 (0x40))

Used with system-audit ACEs in an SACL to generate audit messages for successful access attempts.

FAILED_ACCESS_ACE_FLAG (128 (0x80))

Used with system-audit ACEs in an SACL to generate audit messages for failed access attempts.

AceType

Data type: uint32
Access type: Read/write
Qualifiers: Override (AceType), WritePrivileges ("SeSecurityPrivilege", "SeRestorePrivilege")

Type of ACE.

Access Allowed (0)

Access Denied (1)

Audit (2)

GuidInheritedObjectType

Data type: string
Access type: Read/write
Qualifiers: Override (GuidInheritedObjectType), WritePrivileges ("SeSecurityPrivilege", "SeRestorePrivilege")

Globally unique identifier (GUID) associated with the parent of the object to which these rights apply.

GuidObjectType

Data type: string
Access type: Read/write
Qualifiers: Override (GuidObjectType), WritePrivileges ("SeSecurityPrivilege", "SeRestorePrivilege")

GUID associated with the type of object to which these rights apply.

TIME_CREATED

Data type: uint64
Access type: Read-only

The time, in the CIM_DATETIME format, when the security descriptor was created.

This property is inherited from __ACE.

Trustee

Data type: Win32_Trustee
Access type: Read/write
Qualifiers: Override (Trustee), WritePrivileges ("SeSecurityPrivilege", "SeRestorePrivilege")

Object representing the user account, group account, or logon session to which an ACE applies.

Remarks

The Win32_ACE class is derived from Win32_MethodParameterClass.

In the AccessMask property, the values of the individual rights are added together to form the value. For example, to grant the access permissions FILE_WRITE_ATTRIBUTES, FILE_READ_EA and FILE_WRITE_EA you add the associated values 256, 16, and 8. In this example, the value of AccessMask is 280.

Some values have different meanings depending on whether the AccessMask property is associated with a file or a directory. For example, when working with a file, the value 4 means FILE_APPEND_DATA or the right to add data to the file. The same value that is associated with a directory, means FILE_ADD_SUBDIRECTORY and grants the right to create a subdirectory.

Requirements


Minimum supported client	Windows Vista
Minimum supported server	Windows Server 2008
Namespace	Root\CIMV2
MOF	Secrcw32.mof
DLL	CIMWin32.dll

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