Rearrange the file tree.

[u/mdw/catacomb] / idea.h

diff --git a/idea.h b/idea.h
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-/* -*-c-*-
- *
- * $Id: idea.h,v 1.4 2004/04/08 01:36:15 mdw Exp $
- *
- * Implementation of the IDEA cipher
- *
- * (c) 1999 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 IDEA block cipher ------------------------------------*
- *
- * IDEA was invented by James Massey and Xuejia Lai.  The fundamental idea
- * underlying the cipher is combining incompatible group operations.  The
- * algorithm's main claim to fame is that it is the symmetric cipher in PGP
- * version 2.
- *
- * The IDEA algorithm is allegedly patented by Ascom Tech A.G., even in the
- * UK and Europe.  Ascom are willing to grant licences for use in software
- * which forbids commercial use, but this is not compatible with Free
- * Software Foundation ideology.  The author recommends against the use of
- * the IDEA cipher entirely.  Blowfish is conceptually simpler, appears more
- * concervative, offers a larger keyspace, runs faster, and is in the public
- * domain.
- */
-
-#ifndef CATACOMB_IDEA_H
-#define CATACOMB_IDEA_H
-
-#ifdef __cplusplus
-  extern "C" {
-#endif
-
-/*----- Header files ------------------------------------------------------*/
-
-#include <stddef.h>
-
-#include <mLib/bits.h>
-
-/*----- Magical numbers ---------------------------------------------------*/
-
-#define IDEA_BLKSZ 8
-#define IDEA_KEYSZ 16
-#define IDEA_CLASS (N, B, 64)
-
-extern const octet idea_keysz[];
-
-/*----- Data structures ---------------------------------------------------*/
-
-typedef struct idea_ctx {
-  uint16 e[52];
-  uint16 d[52];
-} idea_ctx;
-
-/*----- Functions provided ------------------------------------------------*/
-
-/* --- @idea_init@ --- *
- *
- * Arguments:  @idea_ctx *k@ = pointer to key block
- *             @const void *buf@ = pointer to key buffer
- *             @size_t sz@ = size of key material
- *
- * Returns:    ---
- *
- * Use:                Initializes an IDEA key buffer.  The buffer must be exactly
- *             16 bytes in size, because IDEA is only defined with a key
- *             size of 128 bits.
- */
-
-extern void idea_init(idea_ctx */*k*/, const void */*buf*/, size_t /*sz*/);
-
-/* --- @idea_eblk@, @idea_dblk@ --- *
- *
- * Arguments:  @const idea_ctx *k@ = pointer to a key block
- *             @const uint32 s[2]@ = pointer to source block
- *             @uint32 d[2]@ = pointer to destination block
- *
- * Returns:    ---
- *
- * Use:                Low-level block encryption and decryption.
- */
-
-extern void idea_eblk(const idea_ctx */*k*/,
-                     const uint32 */*s*/, uint32 */*d*/);
-extern void idea_dblk(const idea_ctx */*k*/,
-                     const uint32 */*s*/, uint32 */*d*/);
-
-/*----- That's all, folks -------------------------------------------------*/
-
-#ifdef __cplusplus
-  }
-#endif
-
-#endif