1 files changed, 45 insertions, 0 deletions
diff --git a/windows/nsis-plugins/src/os/os.cpp b/windows/nsis-plugins/src/os/os.cpp
new file mode 100644
index 0000000000..b5b1e54250
--- /dev/null
+++ b/windows/nsis-plugins/src/os/os.cpp
@@ -0,0 +1,45 @@
+#include <stdafx.h>
+#include "../error.h"
+#include "update.h"
+#include <libcommon/string.h>
+#include <windows.h>
+#include <nsis/pluginapi.h>
+#include <functional>
+#include <vector>
+
+enum PatchStatus
+{
+	PATCH_ERROR = 0,
+	PATCH_PRESENT,
+	PATCH_MISSING
+};
+
+void __declspec(dllexport) NSISCALL CheckWindows7Patch
+(
+	HWND hwndParent,
+	int string_size,
+	LPTSTR variables,
+	stack_t** stacktop,
+	extra_parameters* extra,
+	...
+)
+{
+	EXDLL_INIT();
+
+	try
+	{
+		const auto success = update::HasSetupApiSha2Fix();
+		pushstring(L"");
+		pushint(success ? PatchStatus::PATCH_PRESENT : PatchStatus::PATCH_MISSING);
+	}
+	catch (const std::exception& err)
+	{
+		pushstring(common::string::ToWide(err.what()).c_str());
+		pushint(PatchStatus::PATCH_ERROR);
+	}
+	catch (...)
+	{
+		pushstring(L"Unspecified error");
+		pushint(PatchStatus::PATCH_ERROR);
+	}
+}