Add skeleton ecdsa.[ch]
diff --git a/include/polarssl/ecdsa.h b/include/polarssl/ecdsa.h
new file mode 100644
index 0000000..cf7a788
--- /dev/null
+++ b/include/polarssl/ecdsa.h
@@ -0,0 +1,47 @@
+/**
+ * \file ecdsa.h
+ *
+ * \brief Elliptic curve DSA
+ *
+ * Copyright (C) 2006-2013, Brainspark B.V.
+ *
+ * This file is part of PolarSSL (http://www.polarssl.org)
+ * Lead Maintainer: Paul Bakker <polarssl_maintainer at polarssl.org>
+ *
+ * All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+#ifndef POLARSSL_ECDSA_H
+#define POLARSSL_ECDSA_H
+
+#include "polarssl/ecp.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * \brief Checkup routine
+ *
+ * \return 0 if successful, or 1 if the test failed
+ */
+int ecdsa_self_test( int verbose );
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif