X-Git-Url: https://git.distorted.org.uk/u/mdw/catacomb/blobdiff_plain/ba6e6b64033b1f9de49feccb5c9cd438354481f7..0f00dc4c8eb47e67bc0f148c2dd109f73a451e0a:/rijndael.h

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-/* -*-c-*-
- *
- * $Id: rijndael.h,v 1.4 2004/04/08 01:36:15 mdw Exp $
- *
- * The Rijndael block cipher
- *
- * (c) 2000 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 Rijndael block cipher --------------------------------*
- *
- * Invented by Joan Daemen and Vincent Rijmen, Rijndael is a fast, elegant
- * and relatively simple 128-bit block cipher.  It was chosen by NIST to be
- * the new Advanced Encryption Standard (AES) algorithm.
- *
- * Rijnadel appears to have a low security margin.  I recommend waiting
- * before using Rijndael for any sensitive applications.
- */
-
-#ifndef CATACOMB_RIJNDAEL_H
-#define CATACOMB_RIJNDAEL_H
-
-#ifdef __cplusplus
-  extern "C" {
-#endif
-
-/*----- Header files ------------------------------------------------------*/
-
-#include <stddef.h>
-
-#include <mLib/bits.h>
-
-/*----- Magical numbers ---------------------------------------------------*/
-
-#define RIJNDAEL_BLKSZ 16
-#define RIJNDAEL_KEYSZ 32
-#define RIJNDAEL_CLASS (N, B, 128)
-
-extern const octet rijndael_keysz[];
-
-/*----- Data structures ---------------------------------------------------*/
-
-#define RIJNDAEL_MAXROUNDS 16
-#define RIJNDAEL_KWORDS ((RIJNDAEL_MAXROUNDS + 1) * 8)
-
-typedef struct rijndael_ctx {
-  unsigned nr;
-  uint32 w[RIJNDAEL_KWORDS];
-  uint32 wi[RIJNDAEL_KWORDS];
-} rijndael_ctx;
-
-/*----- Functions provided ------------------------------------------------*/
-
-/* --- @rijndael_setup@ --- *
- *
- * Arguments:	@rijndael_ctx *k@ = pointer to context to initialize
- *		@unsigned nb@ = number of words in the block
- *		@const void *buf@ = pointer to buffer of key material
- *		@size_t sz@ = size of the key material
- *
- * Returns:	---
- *
- * Use:		Low-level key-scheduling.  Don't call this directly.
- */
-
-extern void rijndael_setup(rijndael_ctx */*k*/, unsigned /*nb*/,
-			   const void */*buf*/, size_t /*sz*/);
-
-/* --- @rijndael_init@ --- *
- *
- * Arguments:	@rijndael_ctx *k@ = pointer to context to initialize
- *		@const void *buf@ = pointer to buffer of key material
- *		@size_t sz@ = size of the key material
- *
- * Returns:	---
- *
- * Use:		Initializes a Rijndael context with a particular key.  This
- *		implementation of Rijndael doesn't impose any particular
- *		limits on the key size except that it must be multiple of 4
- *		bytes long.  256 bits seems sensible, though.
- */
-
-extern void rijndael_init(rijndael_ctx */*k*/,
-			  const void */*buf*/, size_t /*sz*/);
-
-/* --- @rijndael_eblk@, @rijndael_dblk@ --- *
- *
- * Arguments:	@const rijndael_ctx *k@ = pointer to Rijndael context
- *		@const uint32 s[4]@ = pointer to source block
- *		@uint32 d[4]@ = pointer to destination block
- *
- * Returns:	---
- *
- * Use:		Low-level block encryption and decryption.
- */
-
-extern void rijndael_eblk(const rijndael_ctx */*k*/,
-			  const uint32 */*s*/, uint32 */*dst*/);
-extern void rijndael_dblk(const rijndael_ctx */*k*/,
-			  const uint32 */*s*/, uint32 */*dst*/);
-
-/*----- That's all, folks -------------------------------------------------*/
-
-#ifdef __cplusplus
-  }
-#endif
-
-#endif