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ACCESS_MASK info  Overview  Group

The ACCESS_MASK structure is one doubleword value containing standard, specific, and generic rights. These rights are used in access-control entries (ACEs) and are the primary means of specifying the requested or granted access to an object.

typedef DWORD ACCESS_MASK; 

 

The bits in this value are allocated as follows:

Bits

Meaning

0 through 15

Specific rights. Contains the access mask specific to the object type associated with the mask.

16 through 23

Standard rights. Contains the objectís standard access rights and can be a combination of the following predefined flags:

Bit

Flag

Meaning

16

DELETE

Delete access

17

READ_CONTROL

Read access to the owner, group, and discretionary access-control list (ACL) of the security descriptor

18

WRITE_DAC

Write access to the discretionary access-control list (ACL)

19

WRITE_OWNER

Write access to owner

20

SYNCHRONIZE

Windows NT: Synchronize access

Bits

Meaning

24

Access system security (ACCESS_SYSTEM_SECURITY). This flag is not a typical access type. It is used to indicate access to a system ACL. This type of access requires the calling process to have a specific privilege.

25

Maximum allowed (MAXIMUM_ALLOWED)

26 through 27

Reserved

28

Generic all (GENERIC_ALL)

29

Generic execute (GENERIC_EXECUTE)

30

Generic write (GENERIC_WRITE)

31

Generic read (GENERIC_READ)

The following constants represent the specific and standard access rights:

#define SPECIFIC_RIGHTS_ALL           0x0000FFFF 

#define STANDARD_RIGHTS_REQUIRED      0x000F0000 

#define STANDARD_RIGHTS_ALL           0x001F0000 

 

See Also

GENERIC_MAPPING 

See also:


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