[PATCH 0/1] MR7682: ntdll: Implement RtlCreateServiceSid

[Steven Flint (＠sflint)]

Windows Vista added the concept of virtual accounts for services.
There exists a deterministic mapping between the name of a service and its
security identifier.

The format of virtual account's SID is the following.

Revision: 1

Identifier Authority: NT_AUTHORITY (5)

Domain Identifier: NT_SERVICE (80)

Relative Identifier: SHA1(ServiceName)

For example the SID of a service named "TestService" is:
S-1-5-80-3892056402-659729507-4115993473-1921682939-1565901394

RtlCreateServiceSid generates the SID of a service from its name.

This function is the first step towards adding virtual account support to System.Security.Principal.NTAccount from .NET which is required for OculusSetup.exe.