RtlSelfRelativeToAbsoluteSD - NtDoc

Native API online documentation, based on the System Informer (formerly Process Hacker) phnt headers
#ifndef _NTRTL_H

NTSYSAPI
NTSTATUS
NTAPI
RtlSelfRelativeToAbsoluteSD(
    _In_ PSECURITY_DESCRIPTOR SelfRelativeSecurityDescriptor,
    _Out_writes_bytes_to_opt_(*AbsoluteSecurityDescriptorSize, *AbsoluteSecurityDescriptorSize) PSECURITY_DESCRIPTOR AbsoluteSecurityDescriptor,
    _Inout_ PULONG AbsoluteSecurityDescriptorSize,
    _Out_writes_bytes_to_opt_(*DaclSize, *DaclSize) PACL Dacl,
    _Inout_ PULONG DaclSize,
    _Out_writes_bytes_to_opt_(*SaclSize, *SaclSize) PACL Sacl,
    _Inout_ PULONG SaclSize,
    _Out_writes_bytes_to_opt_(*OwnerSize, *OwnerSize) PSID Owner,
    _Inout_ PULONG OwnerSize,
    _Out_writes_bytes_to_opt_(*PrimaryGroupSize, *PrimaryGroupSize) PSID PrimaryGroup,
    _Inout_ PULONG PrimaryGroupSize
    );

#endif

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This function is documented in Windows Driver Kit.