license collector (#1524)

pkg/headers/slc/slc.go

@@ -0,0 +1,40 @@
+package slc
+
+import (
+	"errors"
+	"unsafe"
+
+	"golang.org/x/sys/windows"
+)
+
+var (
+	slc                         = windows.NewLazySystemDLL("slc.dll")
+	procSLIsWindowsGenuineLocal = slc.NewProc("SLIsWindowsGenuineLocal")
+)
+
+// Define SL_GENUINE_STATE enumeration
+// https://learn.microsoft.com/en-us/windows/win32/api/slpublic/ne-slpublic-sl_genuine_state
+type SL_GENUINE_STATE uint32
+
+const (
+	SL_GEN_STATE_IS_GENUINE SL_GENUINE_STATE = iota
+	SL_GEN_STATE_INVALID_LICENSE
+	SL_GEN_STATE_TAMPERED
+	SL_GEN_STATE_OFFLINE
+	SL_GEN_STATE_LAST
+)
+
+// SLIsWindowsGenuineLocal function wrapper
+func SLIsWindowsGenuineLocal() (SL_GENUINE_STATE, error) {
+	var genuineState SL_GENUINE_STATE
+
+	_, _, err := procSLIsWindowsGenuineLocal.Call(
+		uintptr(unsafe.Pointer(&genuineState)),
+	)
+
+	if !errors.Is(err, windows.NTE_OP_OK) {
+		return 0, err
+	}
+
+	return genuineState, nil
+}