Add initial nistec project files

p256_ordinv_export_test.go

@@ -0,0 +1,13 @@
+// Copyright 2022 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package nistec
+
+// This file exports the P256OrdInverse function so it's accessible during tests
+// from the unmodified p256_ordinv_test.go from the stdlib, but not as part
+// of the public API of filippo.io/nistec.
+
+func P256OrdInverse(k []byte) ([]byte, error) {
+	return p256OrdInverse(k)
+}