/**
* \file
* <!--
+ * This file is part of BeRTOS.
+ *
+ * Bertos is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
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+ * This program is distributed in the hope that it will be useful,
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+ *
+ * As a special exception, you may use this file as part of a free software
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+ * templates or use macros or inline functions from this file, or you compile
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+ *
* Copyright 2007 Develer S.r.l. (http://www.develer.com/)
- * This file is part of DevLib - See README.devlib for information.
+ *
* -->
*
* \brief MD2 Message-Digest algorithm.
*
+ * The algorithm takes as input a message of arbitrary length and produces
+ * as output a 128-bit message digest of the input.
+ * It is conjectured that it is computationally infeasible to produce
+ * two messages having the same message digest, or to produce any
+ * message having a given prespecified target message digest.
+ *
+ *
+ *
* \version $Id$
* \author Daniele Basile <asterix@develer.com>
*/
/*#*
*#* $Log$
+ *#* Revision 1.7 2007/02/15 13:29:49 asterix
+ *#* Add MD2_DIGEST_LEN macro.
+ *#*
+ *#* Revision 1.6 2007/02/02 18:15:31 asterix
+ *#* Add function MD2_test. Fix bug in md2_update function.
+ *#*
+ *#* Revision 1.5 2007/02/02 15:37:45 asterix
+ *#* Change md2_end prototype. Remove a unneeded memcpy in md2_end. Add comments.
+ *#*
+ *#* Revision 1.4 2007/01/31 13:53:36 asterix
+ *#* Define COMPUTE_ARRAY_LEN.
+ *#*
+ *#* Revision 1.3 2007/01/31 11:16:48 asterix
+ *#* Defined constants for algorithm compute
+ *#*
+ *#* Revision 1.2 2007/01/30 17:31:44 asterix
+ *#* Add function prototypes.
+ *#*
*#* Revision 1.1 2007/01/30 15:53:26 batt
*#* Add first md2 skel.
*#*
#include <cfg/compiler.h>
#include <appconfig.h>
+#define NUM_COMPUTE_ROUNDS 18 ///< Number of compute rounds.
+#define COMPUTE_ARRAY_LEN CONFIG_MD2_BLOCK_LEN * 3 ///< Lenght of compute array.
+#define MD2_DIGEST_LEN CONFIG_MD2_BLOCK_LEN
/**
* Context for MD2 computation.
*/
typedef struct Md2Context
{
- uint8_t buffer[CONFIG_MD2_BLOBK_LEN]; ///< Input buffer.
- uint8_t state[CONFIG_MD2_BLOBK_LEN]; ///< Current state buffer.
- uint8_t checksum[CONFIG_MD2_BLOBK_LEN]; ///< Checksum.
+ uint8_t buffer[CONFIG_MD2_BLOCK_LEN]; ///< Input buffer.
+ uint8_t state[CONFIG_MD2_BLOCK_LEN]; ///< Current state buffer.
+ uint8_t checksum[CONFIG_MD2_BLOCK_LEN]; ///< Checksum.
size_t counter; ///< Counter of remaining bytes.
+
} Md2Context;
+void md2_init(Md2Context *context);
+void md2_update(Md2Context *context, const void *block_in, size_t block_len);
+uint8_t *md2_end(Md2Context *context);
+bool md2_test(void);
#endif /* ALGOS_MD2_H */