Refactor code from test/ to utils/ since they are not just used by tests.

Also, adds a simple analog of verify_data.

BUG=none
TEST=none

Review URL: http://codereview.chromium.org/578025

include/verify_data.h

@@ -0,0 +1,20 @@
+/* Copyright (c) 2010 The Chromium OS Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#ifndef VBOOT_REFERENCE_VERIFY_DATA_H_
+#define VBOOT_REFERENCE_VERIFY_DATA_H_
+
+/* Reads a pre-processed key from [input_file] and
+ * returns it in a RSAPublicKey structure.
+ * Caller owns the returned key and must free it.
+ */
+RSAPublicKey* read_RSAkey(char *input_file);
+
+/* Return a signature of [len] bytes read from [input_file].
+ * Caller owns the returned signature and must free it.
+ */
+uint8_t* read_signature(char *input_file, int len);
+
+#endif  /* VBOOT_REFERENCE_VERIFY_DATA_H_ */