Add TEA enc/decryption algorithm.

[bertos.git] / algos / tea.h

diff --git a/algos/tea.h b/algos/tea.h
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+++ b/algos/tea.h
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+/**
+ * \file
+ * <!--
+ * Copyright 2006 Develer S.r.l. (http://www.develer.com/)
+ * This file is part of DevLib - See README.devlib for information.
+ * -->
+ *
+ * \brief TEA Tiny Encription Algorith functions (interface).
+ *
+ * \version $Id$
+ * \author Francesco Sacchi <batt@develer.com>
+ *
+ * Documentation for TEA is available at
+ * http://www.cl.cam.ac.uk/ftp/users/djw3/tea.ps.
+ */
+
+#ifndef ALGOS_TEA_H
+#define ALGOS_TEA_H
+
+#include <cfg/compiler.h>
+
+#define TEA_KEY_LEN     16     //!< TEA key size.
+#define TEA_BLOCK_LEN   8      //!< TEA block length.
+
+#define DELTA   0x9E3779B9     //!< Magic value. (Golden number * 2^31)
+#define ROUNDS  32             //!< Number of rounds.
+
+void tea_enc(void *_v, void *_k);
+void tea_dec(void *_v, void *_k);
+
+#endif /* ALGOS_TEA_H */
+