X-Git-Url: https://git.distorted.org.uk/u/mdw/catacomb/blobdiff_plain/a351d052dda03a2cc1af01dcef4640891f551ada..10217a5c148f63def6fc564960a9f28ae42d52dc:/hmac-def.h

diff --git a/hmac-def.h b/hmac-def.h
index 38dd64a..a8f2640 100644
--- a/hmac-def.h
+++ b/hmac-def.h
@@ -1,6 +1,6 @@
 /* -*-c-*-
  *
- * $Id: hmac-def.h,v 1.3 2000/07/02 18:27:42 mdw Exp $
+ * $Id: hmac-def.h,v 1.4 2000/07/15 10:00:58 mdw Exp $
  *
  * Definitions for HMAC and NMAC
  *
@@ -30,6 +30,9 @@
 /*----- Revision history --------------------------------------------------* 
  *
  * $Log: hmac-def.h,v $
+ * Revision 1.4  2000/07/15 10:00:58  mdw
+ * New generic hash operation for copying hash contexts.
+ *
  * Revision 1.3  2000/07/02 18:27:42  mdw
  * (ghash->ops->done): Interface change.  Passing in a null buffer pointer
  * uses a buffer internal to the ghash object.  The operation returns the
@@ -253,6 +256,14 @@ static octet *ghdone(ghash *h, void *buf)				\
   return (buf);								\
 }									\
 									\
+static ghash *ghcopy(ghash *h)						\
+{									\
+  gctx *g = (gctx *)h;							\
+  gctx *gg = S_CREATE(gctx);						\
+  memcpy(gg, g, sizeof(gctx));						\
+  return (&gg->h);							\
+}									\
+									\
 static void ghdestroy(ghash *h)						\
 {									\
   gctx *g = (gctx *)h;							\
@@ -278,7 +289,7 @@ const gcmac pre##_hmac =						\
 static const gmac_ops gkops = { &pre##_hmac, gkinit, gkdestroy };	\
 static const gchash gch = { #pre "-hmac", PRE##_HASHSZ, ghinit };	\
 static const ghash_ops gops =						\
-  { &gch, ghhash, ghdone, ghdestroy };					\
+  { &gch, ghhash, ghdone, ghdestroy, ghcopy };				\
 									\
 HMAC_TEST(PRE, pre)