X-Git-Url: https://git.distorted.org.uk/u/mdw/catacomb/blobdiff_plain/b817bfc642225b8c3c0b6a7e42d1fb949b61a606..80be023065ced106a4078a36371c135a60d2bd6c:/des.h

diff --git a/des.h b/des.h
index b24037b..489d5e0 100644
--- a/des.h
+++ b/des.h
@@ -1,6 +1,6 @@
 /* -*-c-*-
  *
- * $Id: des.h,v 1.4 2004/04/08 01:36:15 mdw Exp $
+ * $Id$
  *
  * The Data Encryption Standard
  *
@@ -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