4 * Copyright 2007 Develer S.r.l. (http://www.develer.com/)
5 * This file is part of DevLib - See README.devlib for information.
8 * \brief MD2 Message-Digest algorithm.
10 * The algorithm takes as input a message of arbitrary length and produces
11 * as output a 128-bit message digest of the input.
12 * It is conjectured that it is computationally infeasible to produce
13 * two messages having the same message digest, or to produce any
14 * message having a given prespecified target message digest.
19 * \author Daniele Basile <asterix@develer.com>
24 *#* Revision 1.7 2007/02/15 13:29:49 asterix
25 *#* Add MD2_DIGEST_LEN macro.
27 *#* Revision 1.6 2007/02/02 18:15:31 asterix
28 *#* Add function MD2_test. Fix bug in md2_update function.
30 *#* Revision 1.5 2007/02/02 15:37:45 asterix
31 *#* Change md2_end prototype. Remove a unneeded memcpy in md2_end. Add comments.
33 *#* Revision 1.4 2007/01/31 13:53:36 asterix
34 *#* Define COMPUTE_ARRAY_LEN.
36 *#* Revision 1.3 2007/01/31 11:16:48 asterix
37 *#* Defined constants for algorithm compute
39 *#* Revision 1.2 2007/01/30 17:31:44 asterix
40 *#* Add function prototypes.
42 *#* Revision 1.1 2007/01/30 15:53:26 batt
43 *#* Add first md2 skel.
50 #include <cfg/compiler.h>
51 #include <appconfig.h>
53 #define NUM_COMPUTE_ROUNDS 18 ///< Number of compute rounds.
54 #define COMPUTE_ARRAY_LEN CONFIG_MD2_BLOCK_LEN * 3 ///< Lenght of compute array.
55 #define MD2_DIGEST_LEN CONFIG_MD2_BLOCK_LEN
57 * Context for MD2 computation.
59 typedef struct Md2Context
61 uint8_t buffer[CONFIG_MD2_BLOCK_LEN]; ///< Input buffer.
62 uint8_t state[CONFIG_MD2_BLOCK_LEN]; ///< Current state buffer.
63 uint8_t checksum[CONFIG_MD2_BLOCK_LEN]; ///< Checksum.
64 size_t counter; ///< Counter of remaining bytes.
68 void md2_init(Md2Context *context);
69 void md2_update(Md2Context *context, const void *block_in, size_t block_len);
70 uint8_t *md2_end(Md2Context *context);
73 #endif /* ALGOS_MD2_H */