NtAllocateUuids - NtDoc

Native API online documentation, based on the System Informer (formerly Process Hacker) phnt headers
#ifndef _NTEXAPI_H
#if (PHNT_MODE != PHNT_MODE_KERNEL)

NTSYSCALLAPI
NTSTATUS
NTAPI
NtAllocateUuids(
    _Out_ PULARGE_INTEGER Time,
    _Out_ PULONG Range,
    _Out_ PULONG Sequence,
    _Out_ PCHAR Seed
    );

#endif
#endif

View code on GitHub
#ifndef _NTZWAPI_H

NTSYSCALLAPI
NTSTATUS
NTAPI
ZwAllocateUuids(
    _Out_ PULARGE_INTEGER Time,
    _Out_ PULONG Range,
    _Out_ PULONG Sequence,
    _Out_ PCHAR Seed
    );

#endif

View code on GitHub

Function NtAllocateUuids allocates User Unique Identifier's base values. UUIDs are used to build unique SIDs.

Time

Returns current time.

Range

Returns allocation range. (???)

Sequence

Returns allocation sequence. (???)

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See also