X-Git-Url: https://git.distorted.org.uk/u/mdw/catacomb/blobdiff_plain/b817bfc642225b8c3c0b6a7e42d1fb949b61a606..45c0fd363937c6e9b05da04a9167e9912c05ca0c:/des.h

diff --git a/des.h b/des.h
index b24037b..f3fe91c 100644
--- a/des.h
+++ b/des.h
@@ -1,13 +1,13 @@
 /* -*-c-*-
  *
- * $Id: des.h,v 1.4 2004/04/08 01:36:15 mdw Exp $
+ * $Id$
  *
  * The Data Encryption Standard
  *
  * (c) 1999 Straylight/Edgeware
  */
 
-/*----- Licensing notice --------------------------------------------------* 
+/*----- Licensing notice --------------------------------------------------*
  *
  * This file is part of Catacomb.
  *
@@ -15,12 +15,12 @@
  * 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,
@@ -68,6 +68,22 @@ typedef struct des_ctx {
 
 /*----- Functions provided ------------------------------------------------*/
 
+/* --- @des_expand@ --- *
+ *
+ * Arguments:	@const octet *k@ = pointer to key material
+ *		@size_t n@ = number of octets of key material (7 or 8)
+ *		@uint32 *xx, *yy@ = where to put the results
+ *
+ * Returns:	---
+ *
+ * Use:		Extracts 64 bits of key material from the given buffer,
+ *		possibly expanding it from 56 to 64 bits on the way.
+ *		Parity is set correctly if the key is expanded.
+ */
+
+extern void des_expand(const octet */*k*/, size_t /*n*/,
+		       uint32 */*xx*/, uint32 */*yy*/);
+
 /* --- @des_init@ --- *
  *
  * Arguments:	@des_ctx *k@ = pointer to key block