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[u/mdw/catacomb] / has160.h

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-/* -*-c-*-
- *
- * $Id: has160.h,v 1.2 2004/04/08 01:36:15 mdw Exp $
- *
- * The HAS160 message digest function
- *
- * (c) 2004 Straylight/Edgeware
- */
-
-/*----- Licensing notice --------------------------------------------------*
- *
- * This file is part of Catacomb.
- *
- * Catacomb is free software; you can redistribute it and/or modify
- * it under the terms of the GNU Library General Public License as
- * published by the Free Software Foundation; either version 2 of the
- * License, or (at your option) any later version.
- *
- * Catacomb 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 Library General Public License for more details.
- *
- * You should have received a copy of the GNU Library General Public
- * License along with Catacomb; if not, write to the Free
- * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
- * MA 02111-1307, USA.
- */
-
-/*----- Notes on the HAS160 hash function ---------------------------------*
- *
- * HAS160 was designed by Chae Hoon Lim and the Korean Information Security
- * Agency (KISA).  It's recommended for use with KCDSA (though I think I'm
- * happer with RIPEMD-160 or SHA1).  It's here so I can check KCDSA test
- * vectors.
- */
-
-#ifndef CATACOMB_HAS160_H
-#define CATACOMB_HAS160_H
-
-#ifdef __cplusplus
-  extern "C" {
-#endif
-
-/*----- Header files ------------------------------------------------------*/
-
-#include <mLib/bits.h>
-
-#ifndef CATACOMB_GHASH_H
-#  include "ghash.h"
-#endif
-
-/*----- Magic numbers -----------------------------------------------------*/
-
-#define HAS160_BUFSZ 64
-#define HAS160_HASHSZ 20
-#define HAS160_STATESZ 20
-
-/*----- Data structures ---------------------------------------------------*/
-
-typedef struct has160_ctx {
-  uint32 a, b, c, d, e;                        /* Chaining variables */
-  uint32 nl, nh;                       /* Byte count so far */
-  unsigned off;                                /* Offset into buffer */
-  octet buf[HAS160_BUFSZ];             /* Accumulation buffer */
-} has160_ctx;
-
-/*----- Functions provided ------------------------------------------------*/
-
-/* --- @has160_compress@ --- *
- *
- * Arguments:  @has160_ctx *ctx@ = pointer to context block
- *             @const void *sbuf@ = pointer to buffer of appropriate size
- *
- * Returns:    ---
- *
- * Use:                HAS160 compression function.
- */
-
-extern void has160_compress(has160_ctx */*ctx*/, const void */*sbuf*/);
-
-/* --- @has160_init@ --- *
- *
- * Arguments:  @has160_ctx *ctx@ = pointer to context block to initialize
- *
- * Returns:    ---
- *
- * Use:                Initializes a context block ready for hashing.
- */
-
-extern void has160_init(has160_ctx */*ctx*/);
-
-/* --- @has160_set@ --- *
- *
- * Arguments:  @has160_ctx *ctx@ = pointer to context block
- *             @const void *buf@ = pointer to state buffer
- *             @unsigned long count@ = current count of bytes processed
- *
- * Returns:    ---
- *
- * Use:                Initializes a context block from a given state.  This is
- *             useful in cases where the initial hash state is meant to be
- *             secret, e.g., for NMAC and HMAC support.
- */
-
-extern void has160_set(has160_ctx */*ctx*/, const void */*buf*/,
-                      unsigned long /*count*/);
-
-/* --- @has160_hash@ --- *
- *
- * Arguments:  @has160_ctx *ctx@ = pointer to context block
- *             @const void *buf@ = buffer of data to hash
- *             @size_t sz@ = size of buffer to hash
- *
- * Returns:    ---
- *
- * Use:                Hashes a buffer of data.  The buffer may be of any size and
- *             alignment.
- */
-
-extern void has160_hash(has160_ctx */*ctx*/,
-                       const void */*buf*/, size_t /*sz*/);
-
-/* --- @has160_done@ --- *
- *
- * Arguments:  @has160_ctx *ctx@ = pointer to context block
- *             @void *hash@ = pointer to output buffer
- *
- * Returns:    ---
- *
- * Use:                Returns the hash of the data read so far.
- */
-
-extern void has160_done(has160_ctx */*ctx*/, void */*hash*/);
-
-/* --- @has160_state@ --- *
- *
- * Arguments:  @has160_ctx *ctx@ = pointer to context
- *             @void *state@ = pointer to buffer for current state
- *
- * Returns:    Number of bytes written to the hash function so far.
- *
- * Use:                Returns the current state of the hash function such that
- *             it can be passed to @has160_set@.
- */
-
-extern unsigned long has160_state(has160_ctx */*ctx*/, void */*state*/);
-
-/*----- Generic hash interface --------------------------------------------*/
-
-extern const gchash has160;
-
-/*----- That's all, folks -------------------------------------------------*/
-
-#ifdef __cplusplus
-  }
-#endif
-
-#endif