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Add CreateWellKnownSid()

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Signed-off-by: Simon Rozman <simon@rozman.si>
This commit is contained in:
Simon Rozman 2022-10-14 13:58:42 +02:00
parent f7c31329cd
commit a052c028b5
2 changed files with 33 additions and 0 deletions
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6
UnitTests/Win.cpp
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@ -31,6 +31,12 @@ namespace UnitTests
}
}
TEST_METHOD(CreateWellKnownSid)
{
std::unique_ptr<SID> sid;
Assert::IsTrue(::CreateWellKnownSid(WinBuiltinAdministratorsSid, NULL, sid));
}
TEST_METHOD(library)
{
winstd::library lib_shell32(LoadLibraryEx(_T("shell32.dll"), NULL, LOAD_LIBRARY_AS_DATAFILE | LOAD_LIBRARY_AS_IMAGE_RESOURCE));

27
include/WinStd/Win.h
View File

@ -1240,6 +1240,33 @@ static _Success_(return != 0) BOOL LookupAccountSidW(_In_opt_z_ LPCWSTR lpSystem
return FALSE;
}
///
/// Creates a SID for predefined aliases.
///
/// \sa [CreateWellKnownSid function](https://learn.microsoft.com/en-us/windows/win32/api/securitybaseapi/nf-securitybaseapi-createwellknownsid)
///
static _Success_(return != FALSE) BOOL CreateWellKnownSid(_In_ WELL_KNOWN_SID_TYPE WellKnownSidType, _In_opt_ PSID DomainSid, _Inout_ std::unique_ptr<SID> &Sid)
{
BYTE szStackBuffer[WINSTD_STACK_BUFFER_BYTES/sizeof(BYTE)];
DWORD dwSize = sizeof(szStackBuffer);
// Try with stack buffer first.
if (CreateWellKnownSid(WellKnownSidType, DomainSid, szStackBuffer, &dwSize)) {
// Copy from stack.
Sid.reset((SID*)new BYTE[dwSize]);
memcpy(Sid.get(), szStackBuffer, dwSize);
return TRUE;
}
for (;;) {
if (GetLastError() != ERROR_INSUFFICIENT_BUFFER)
return FALSE;
// Allocate on heap and retry.
Sid.reset((SID*)new BYTE[dwSize]);
if (CreateWellKnownSid(WellKnownSidType, DomainSid, Sid.get(), &dwSize))
return TRUE;
}
}
///
/// Retrieves a specified type of information about an access token. The calling process must have appropriate access rights to obtain the information.
///