X-Git-Url: https://git.distorted.org.uk/~mdw/catacomb/blobdiff_plain/ba6e6b64033b1f9de49feccb5c9cd438354481f7..0f00dc4c8eb47e67bc0f148c2dd109f73a451e0a:/md5.h?ds=sidebyside

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-/* -*-c-*-
- *
- * $Id: md5.h,v 1.5 2004/04/08 01:36:15 mdw Exp $
- *
- * The MD5 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 MD5 hash function ------------------------------------*
- *
- * MD5 was designed by Ron Rivest.  It was intended to be a more conservative
- * design than the slightly earlier MD4, and indeed while MD4 has been pretty
- * much demolished by subsequent cryptanalysis, MD5 is still standing
- * shakily.  It's provided here not because the author recommends its use but
- * because it's a common standard, and is often handy in non-cryptographic
- * applications.  It's also still useful in constructions such as HMAC.
- */
-
-#ifndef CATACOMB_MD5_H
-#define CATACOMB_MD5_H
-
-#ifdef __cplusplus
-  extern "C" {
-#endif
-
-/*----- Header files ------------------------------------------------------*/
-
-#include <mLib/bits.h>
-
-#ifndef CATACOMB_GHASH_H
-#  include "ghash.h"
-#endif
-
-/*----- Magic numbers -----------------------------------------------------*/
-
-#define MD5_BUFSZ 64
-#define MD5_HASHSZ 16
-#define MD5_STATESZ 16
-
-/*----- Data structures ---------------------------------------------------*/
-
-typedef struct md5_ctx {
-  uint32 a, b, c, d;			/* Chaining variables */
-  uint32 nl, nh;			/* Byte count so far */
-  unsigned off;				/* Offset into buffer */
-  octet buf[MD5_BUFSZ];			/* Accumulation buffer */
-} md5_ctx;
-
-/*----- Functions provided ------------------------------------------------*/
-
-/* --- @md5_compress@ --- *
- *
- * Arguments:	@md5_ctx *ctx@ = pointer to context block
- *		@const void *sbuf@ = pointer to buffer of appropriate size
- *
- * Returns:	---
- *
- * Use:		MD5 compression function.
- */
-
-extern void md5_compress(md5_ctx */*ctx*/, const void */*sbuf*/);
-
-/* --- @md5_init@ --- *
- *
- * Arguments:	@md5_ctx *ctx@ = pointer to context block to initialize
- *
- * Returns:	---
- *
- * Use:		Initializes a context block ready for hashing.
- */
-
-extern void md5_init(md5_ctx */*ctx*/);
-
-/* --- @md5_set@ --- *
- *
- * Arguments:	@md5_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 md5_set(md5_ctx */*ctx*/, const void */*buf*/,
-		    unsigned long /*count*/);
-
-/* --- @md5_hash@ --- *
- *
- * Arguments:	@md5_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 md5_hash(md5_ctx */*ctx*/, const void */*buf*/, size_t /*sz*/);
-
-/* --- @md5_done@ --- *
- *
- * Arguments:	@md5_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 md5_done(md5_ctx */*ctx*/, void */*hash*/);
-
-/* --- @md5_state@ --- *
- *
- * Arguments:	@md5_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 @md5_set@.
- */
-
-extern unsigned long md5_state(md5_ctx */*ctx*/, void */*state*/);
-
-/*----- Generic hash interface --------------------------------------------*/
-
-extern const gchash md5;
-
-/*----- That's all, folks -------------------------------------------------*/
-
-#ifdef __cplusplus
-  }
-#endif
-
-#endif