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GetSecurityDescriptorLength info  Overview  Group

The GetSecurityDescriptorLength function returns the length, in bytes, of a structurally valid SECURITY_DESCRIPTOR structure. The length includes the length of all associated structures, such as SID and ACL structures.

DWORD GetSecurityDescriptorLength(

    PSECURITY_DESCRIPTOR pSecurityDescriptor 

// address of security descriptor



Points to the SECURITY_DESCRIPTOR structure whose length the function returns. The SECURITY_DESCRIPTOR structure is assumed to be valid.

Return Values

If the function succeeds, the return value is the length, in bytes, of the SECURITY_DESCRIPTOR structure. If the SECURITY_DESCRIPTOR structure is invalid, the return value is undefined.


The minimum length of a security descriptor is SECURITY_DESCRIPTOR_MIN_LENGTH. A security descriptor of this length has no associated SID or ACL structures.

See Also

GetSecurityDescriptorControl, GetSecurityDescriptorDacl, GetSecurityDescriptorGroup, GetSecurityDescriptorOwner, GetSecurityDescriptorSacl, IsValidSecurityDescriptor, SECURITY_DESCRIPTOR 

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