1 files changed, 0 insertions, 64 deletions
diff --git a/api/driver.c b/api/driver.c
index 172749f..4ed0d76 100644
--- a/api/driver.c
+++ b/api/driver.c
@@ -380,7 +380,6 @@ DriverInstall(HDEVINFO *DevInfoExistingAdaptersForCleanup, SP_DEVINFO_DATA_LIST
     WCHAR CatPath[MAX_PATH] = { 0 };
     WCHAR SysPath[MAX_PATH] = { 0 };
     WCHAR InfPath[MAX_PATH] = { 0 };
-    WCHAR DownlevelShimPath[MAX_PATH] = { 0 };
     if (!PathCombineW(CatPath, RandomTempSubDirectory, L"wintun.cat") ||
         !PathCombineW(SysPath, RandomTempSubDirectory, L"wintun.sys") ||
         !PathCombineW(InfPath, RandomTempSubDirectory, L"wintun.inf"))
@@ -422,77 +421,14 @@ DriverInstall(HDEVINFO *DevInfoExistingAdaptersForCleanup, SP_DEVINFO_DATA_LIST
         goto cleanupDelete;
     }
 
-    WCHAR *WintrustKeyOriginalValue = NULL;
-    HKEY WintrustKey = NULL;
-    if (!IsWindows10)
-    {
-        LOG(WINTUN_LOG_INFO, L"Shimming downlevel driver loader");
-        if (!PathCombineW(DownlevelShimPath, RandomTempSubDirectory, L"downlevelshim.dll"))
-        {
-            DownlevelShimPath[0] = L'\0';
-            LastError = ERROR_BUFFER_OVERFLOW;
-            goto cleanupDelete;
-        }
-        if (!ResourceCopyToFile(DownlevelShimPath, L"downlevelshim.dll"))
-        {
-            LastError = LOG_LAST_ERROR(L"Failed to extract downlevel shim");
-            goto cleanupDelete;
-        }
-        LastError = RegOpenKeyExW(
-            HKEY_LOCAL_MACHINE,
-            L"SOFTWARE\\Microsoft\\Cryptography\\Providers\\Trust\\FinalPolicy\\{F750E6C3-38EE-11D1-85E5-00C04FC295EE}",
-            0,
-            KEY_QUERY_VALUE | KEY_SET_VALUE,
-            &WintrustKey);
-        if (LastError != ERROR_SUCCESS)
-        {
-            LOG_ERROR(LastError, L"Failed to open Wintrust FinalPolicy key");
-            goto cleanupDelete;
-        }
-        WintrustKeyOriginalValue = RegistryQueryString(WintrustKey, L"$DLL", TRUE);
-        if (!WintrustKeyOriginalValue)
-        {
-            LastError = LOG_LAST_ERROR(L"Failed to read current Wintrust FinalPolicy key");
-            goto cleanupWintrustKey;
-        }
-        LastError = RegSetValueExW(
-            WintrustKey,
-            L"$DLL",
-            0,
-            REG_SZ,
-            (BYTE *)DownlevelShimPath,
-            (DWORD)((wcslen(DownlevelShimPath) + 1) * sizeof(DownlevelShimPath[0])));
-        if (LastError != ERROR_SUCCESS)
-        {
-            LOG_ERROR(LastError, L"Failed to set Wintrust FinalPolicy key");
-            goto cleanupWintrustChangedKey;
-        }
-    }
-
     LOG(WINTUN_LOG_INFO, L"Installing driver");
     if (!SetupCopyOEMInfW(InfPath, NULL, SPOST_NONE, 0, NULL, 0, NULL, NULL))
         LastError = LOG_LAST_ERROR(L"Could not install driver %s to store", InfPath);
 
-cleanupWintrustChangedKey:
-    if (WintrustKeyOriginalValue)
-        RegSetValueExW(
-            WintrustKey,
-            L"$DLL",
-            0,
-            REG_SZ,
-            (BYTE *)WintrustKeyOriginalValue,
-            (DWORD)((wcslen(WintrustKeyOriginalValue) + 1) * sizeof(WintrustKeyOriginalValue[0])));
-cleanupWintrustKey:
-    if (WintrustKey)
-        RegCloseKey(WintrustKey);
-    if (WintrustKeyOriginalValue)
-        Free(WintrustKeyOriginalValue);
 cleanupDelete:
     DeleteFileW(CatPath);
     DeleteFileW(SysPath);
     DeleteFileW(InfPath);
-    if (DownlevelShimPath[0])
-        DeleteFileW(DownlevelShimPath);
 cleanupDirectory:
     RemoveDirectoryW(RandomTempSubDirectory);
 cleanupExistingAdapters: