Rearrange the file tree.

[u/mdw/catacomb] / des3.c

diff --git a/des3.c b/des3.c
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-/* -*-c-*-
- *
- * $Id: des3.c,v 1.3 2004/04/08 01:36:15 mdw Exp $
- *
- * Implementation of double- and triple-DES
- *
- * (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.
- */
-
-/*----- Header files ------------------------------------------------------*/
-
-#include <assert.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-
-#include <mLib/bits.h>
-
-#include "blkc.h"
-#include "des-base.h"
-#include "des.h"
-#include "des3.h"
-#include "gcipher.h"
-
-/*----- Global variables --------------------------------------------------*/
-
-const octet des3_keysz[] = { KSZ_SET, 21, 7, 8, 14, 16, 24, 0 };
-
-/*----- Main code ---------------------------------------------------------*/
-
-/* --- @des3_init@ --- *
- *
- * Arguments:  @des3_ctx *k@ = pointer to key block
- *             @const void *buf@ = pointer to key buffer
- *             @size_t sz@ = size of key material
- *
- * Returns:    ---
- *
- * Use:                Initializes a DES key buffer.  The key buffer may have length
- *             7, 8, 14, 16, 21, or 24.  These correspond to one, two or
- *             three DES keys, either packed or unpacked (i.e., still
- *             containing parity bits).
- */
-
-void des3_init(des3_ctx *k, const void *buf, size_t sz)
-{
-  size_t step;
-  const octet *p = buf;
-
-  KSZ_ASSERT(des3, sz);
-
-  if (sz % 7 == 0)
-    step = 7;
-  else
-    step = 8;
-
-  des_init(&k->a, p, step);
-  if (sz > 8) p += step;
-  des_init(&k->b, p, step);
-  if (sz > 16) p += step; else p = buf;
-  des_init(&k->c, p, step);
-}
-
-/* --- @des3_eblk@, @des3_dblk@ --- *
- *
- * Arguments:  @const des3_ctx *k@ = pointer to 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.
- */
-
-void des3_eblk(const des3_ctx *k, const uint32 *s, uint32 *d)
-{
-  uint32 x = s[0], y = s[1];
-  DES_IP(x, y);
-  DES_EBLK(k->a.k, x, y, x, y);
-  DES_DBLK(k->b.k, x, y, x, y);
-  DES_EBLK(k->c.k, x, y, x, y);
-  DES_IPINV(x, y);
-  d[0] = x, d[1] = y;
-}
-
-void des3_dblk(const des3_ctx *k, const uint32 *s, uint32 *d)
-{
-  uint32 x = s[0], y = s[1];
-  DES_IP(x, y);
-  DES_DBLK(k->c.k, x, y, x, y);
-  DES_EBLK(k->b.k, x, y, x, y);
-  DES_DBLK(k->a.k, x, y, x, y);
-  DES_IPINV(x, y);
-  d[0] = x, d[1] = y;
-}
-
-BLKC_TEST(DES3, des3)
-
-/*----- That's all, folks -------------------------------------------------*/