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24a56f89ab
This removes all fake apiset forwarders, and handles apisets inside ntdll. This is not 100% compatible with how windows does it, but it should be good enough for us.
92 lines
2.8 KiB
C
92 lines
2.8 KiB
C
/*
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* PROJECT: ReactOS apisets
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* LICENSE: LGPL-2.1-or-later (https://spdx.org/licenses/LGPL-2.1-or-later)
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* PURPOSE: Resolving the apiset to a ReactOS system dll
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* COPYRIGHT: Copyright 2024 Mark Jansen <mark.jansen@reactos.org>
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*/
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#include <ndk/umtypes.h>
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#include <ndk/rtlfuncs.h>
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#include "apisetsp.h"
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const ULONGLONG API_ = (ULONGLONG)0x2D004900500041; /// L"API-"
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const ULONGLONG EXT_ = (ULONGLONG)0x2D005400580045; /// L"EXT-";
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WORD PrefixSize = sizeof(L"api-") - sizeof(WCHAR);
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WORD ExtensionSize = sizeof(L".dll") - sizeof(WCHAR);
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// The official prototype according to the Windows kit 8.1 is:
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//NTSTATUS
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//ApiSetResolveToHost (
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// _In_ PCAPI_SET_NAMESPACE_ARRAY Schema,
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// _In_ PCUNICODE_STRING FileNameIn,
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// _In_opt_ PCUNICODE_STRING ParentName,
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// _Out_ PBOOLEAN Resolved,
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// _Out_ PUNICODE_STRING HostBinary
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// );
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NTSTATUS
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ApiSetResolveToHost(
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_In_ DWORD ApisetVersion,
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_In_ PCUNICODE_STRING ApiToResolve,
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_Out_ PBOOLEAN Resolved,
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_Out_ PUNICODE_STRING Output
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)
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{
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if (ApiToResolve->Length < PrefixSize)
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{
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*Resolved = FALSE;
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return STATUS_SUCCESS;
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}
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// Grab the first four chars from the string, converting the first 3 to uppercase
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PWSTR ApiSetNameBuffer = ApiToResolve->Buffer;
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ULONGLONG ApiSetNameBufferPrefix = ((ULONGLONG *)ApiSetNameBuffer)[0] & 0xFFFFFFDFFFDFFFDF;
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// Check if it matches either 'api-' or 'ext-'
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if (!(ApiSetNameBufferPrefix == API_ || ApiSetNameBufferPrefix == EXT_))
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{
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*Resolved = FALSE;
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return STATUS_SUCCESS;
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}
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// If there is an extension, cut it off (we store apisets without extension)
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UNICODE_STRING Tmp = *ApiToResolve;
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const WCHAR *Extension = Tmp.Buffer + (Tmp.Length - ExtensionSize) / sizeof(WCHAR);
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if (!_wcsnicmp(Extension, L".dll", ExtensionSize / sizeof(WCHAR)))
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Tmp.Length -= ExtensionSize;
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// Binary search the apisets
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// Ideally we should use bsearch here, but that drags in another dependency and we do not want that here.
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LONG UBnd = g_ApisetsCount - 1;
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LONG LBnd = 0;
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while (LBnd <= UBnd)
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{
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LONG Index = (UBnd - LBnd) / 2 + LBnd;
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LONG result = RtlCompareUnicodeString(&Tmp, &g_Apisets[Index].Name, TRUE);
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if (result == 0)
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{
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// Check if this version is included
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if (g_Apisets[Index].dwOsVersions & ApisetVersion)
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{
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// Return a static string (does not have to be freed)
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*Resolved = TRUE;
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*Output = g_Apisets[Index].Target;
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}
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return STATUS_SUCCESS;
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}
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else if (result < 0)
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{
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UBnd = Index - 1;
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}
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else
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{
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LBnd = Index + 1;
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}
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}
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*Resolved = FALSE;
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return STATUS_SUCCESS;
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}
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