/* -*-c-*-
*
- * $Id: xtea.h,v 1.1 2000/07/15 13:44:31 mdw Exp $
+ * $Id: xtea.h,v 1.4 2004/04/08 01:36:15 mdw Exp $
*
- * The Tiny Encryption Algorithm
+ * The Extended Tiny Encryption Algorithm
*
* (c) 2000 Straylight/Edgeware
*/
-/*----- Licensing notice --------------------------------------------------*
+/*----- Licensing notice --------------------------------------------------*
*
* This file is part of Catacomb.
*
* 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.
*/
-/*----- Revision history --------------------------------------------------*
- *
- * $Log: xtea.h,v $
- * Revision 1.1 2000/07/15 13:44:31 mdw
- * New ciphers.
- *
- */
-
/*----- Notes on the Tiny Encryption Algorithm ----------------------------*
*
* XTEA is an amazingly simple 64-round Feistel network. It's tiny, fairly
/*----- Data structures ---------------------------------------------------*/
typedef struct xtea_ctx {
+ unsigned r;
uint32 k[4];
} xtea_ctx;
/* --- @xtea_init@ --- *
*
- * Arguments: @xtea_ctx *k@ = pointer to key block
- * @const void *buf@ = pointer to key buffer
- * @size_t sz@ = size of key material
+ * Arguments: @xtea_ctx *k@ = pointer to key block
+ * @const void *buf@ = pointer to key buffer
+ * @size_t sz@ = size of key material
*
- * Returns: ---
+ * Returns: ---
*
- * Use: Initializes an XTEA key buffer. The key buffer may be up to
+ * Use: Initializes an XTEA key buffer. The key buffer may be up to
* 16 bytes long.
*/
/* --- @xtea_eblk@, @xtea_dblk@ --- *
*
- * Arguments: @const xtea_ctx *k@ = pointer to key block
- * @const uint32 s[2]@ = pointer to source block
- * @uint32 d[2]@ = pointer to xteatination block
+ * Arguments: @const xtea_ctx *k@ = pointer to key block
+ * @const uint32 s[2]@ = pointer to source block
+ * @uint32 d[2]@ = pointer to xteatination block
*
- * Returns: ---
+ * Returns: ---
*
- * Use: Low-level block encryption and decryption.
+ * Use: Low-level block encryption and decryption.
*/
extern void xtea_eblk(const xtea_ctx */*k*/,