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[u/mdw/catacomb] / md4.h

diff --git a/md4.h b/md4.h
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-/* -*-c-*-
- *
- * $Id: md4.h,v 1.5 2004/04/08 01:36:15 mdw Exp $
- *
- * The MD4 message digest function
- *
- * (c) 1998 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 MD4 hash function ------------------------------------*
- *
- * MD4 was designed by Ron Rivest.  It's now well and truly broken: not only
- * have collisions been discovered, a slightly cut-down version has been
- * shown to be non-preimage-resistant.  On the other hand, MD4 is fast and
- * makes a good heavy-duty checksum.  Just don't rely on it being
- * cryptographically strong, 'cos it ain't.
- */
-
-#ifndef CATACOMB_MD4_H
-#define CATACOMB_MD4_H
-
-#ifdef __cplusplus
-  extern "C" {
-#endif
-
-/*----- Header files ------------------------------------------------------*/
-
-#include <mLib/bits.h>
-
-#ifndef CATACOMB_GHASH_H
-#  include "ghash.h"
-#endif
-
-/*----- Magic numbers -----------------------------------------------------*/
-
-#define MD4_BUFSZ 64
-#define MD4_HASHSZ 16
-#define MD4_STATESZ 16
-
-/*----- Data structures ---------------------------------------------------*/
-
-typedef struct md4_ctx {
-  uint32 a, b, c, d;                   /* Chaining variables */
-  uint32 nl, nh;                       /* Byte count so far */
-  unsigned off;                                /* Offset into buffer */
-  octet buf[MD4_BUFSZ];                        /* Accumulation buffer */
-} md4_ctx;
-
-/*----- Functions provided ------------------------------------------------*/
-
-/* --- @md4_compress@ --- *
- *
- * Arguments:  @md4_ctx *ctx@ = pointer to context block
- *             @const void *sbuf@ = pointer to buffer of appropriate size
- *
- * Returns:    ---
- *
- * Use:                MD4 compression function.
- */
-
-extern void md4_compress(md4_ctx */*ctx*/, const void */*sbuf*/);
-
-/* --- @md4_init@ --- *
- *
- * Arguments:  @md4_ctx *ctx@ = pointer to context block to initialize
- *
- * Returns:    ---
- *
- * Use:                Initializes a context block ready for hashing.
- */
-
-extern void md4_init(md4_ctx */*ctx*/);
-
-/* --- @md4_set@ --- *
- *
- * Arguments:  @md4_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 md4_set(md4_ctx */*ctx*/, const void */*buf*/,
-                   unsigned long /*count*/);
-
-/* --- @md4_hash@ --- *
- *
- * Arguments:  @md4_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 md4_hash(md4_ctx */*ctx*/, const void */*buf*/, size_t /*sz*/);
-
-/* --- @md4_done@ --- *
- *
- * Arguments:  @md4_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 md4_done(md4_ctx */*ctx*/, void */*hash*/);
-
-/* --- @md4_state@ --- *
- *
- * Arguments:  @md4_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 @md4_set@.
- */
-
-extern unsigned long md4_state(md4_ctx */*ctx*/, void */*state*/);
-
-/*----- Generic hash interface --------------------------------------------*/
-
-extern const gchash md4;
-
-/*----- That's all, folks -------------------------------------------------*/
-
-#ifdef __cplusplus
-  }
-#endif
-
-#endif