X-Git-Url: https://git.distorted.org.uk/u/mdw/catacomb/blobdiff_plain/9a707709771d218b8734bac4e345d966c90c3fc9..28ef1f459bf28d73015d4e58afec778647eef5e0:/hmac-def.h

diff --git a/hmac-def.h b/hmac-def.h
index 3f96649..0972b68 100644
--- a/hmac-def.h
+++ b/hmac-def.h
@@ -1,6 +1,6 @@
 /* -*-c-*-
  *
- * $Id: hmac-def.h,v 1.1 1999/12/10 23:16:40 mdw Exp $
+ * $Id: hmac-def.h,v 1.2 2000/06/17 11:23:44 mdw Exp $
  *
  * Definitions for HMAC and NMAC
  *
@@ -30,6 +30,10 @@
 /*----- Revision history --------------------------------------------------* 
  *
  * $Log: hmac-def.h,v $
+ * Revision 1.2  2000/06/17 11:23:44  mdw
+ * Use secure arena for memory allocation.  Minor changes in the generic
+ * hash interface.
+ *
  * Revision 1.1  1999/12/10 23:16:40  mdw
  * Split mode macros into interface and implementation.
  *
@@ -44,12 +48,17 @@
 
 /*----- Header files ------------------------------------------------------*/
 
+#include <assert.h>
 #include <stdlib.h>
 #include <string.h>
 
 #include <mLib/bits.h>
 #include <mLib/sub.h>
 
+#ifndef CATACOMB_ARENA_H
+#  include "arena.h"
+#endif
+
 #ifndef CATACOMB_GMAC_H
 #  include "gmac.h"
 #endif
@@ -69,6 +78,10 @@
 
 #define HMAC_DEF(PRE, pre)						\
 									\
+/* --- Useful constants --- */						\
+									\
+const octet pre##_mackeysz[] = { KSZ_ANY, PRE##_HASHSZ };		\
+									\
 /* --- @pre_nmacinit@ --- *						\
  *									\
  * Arguments:	@pre_macctx *key@ = pointer to a MAC key object		\
@@ -204,7 +217,7 @@ typedef struct gctx {							\
 static ghash *gkinit(gmac *m)						\
 {									\
   gkctx *gk = (gkctx *)m;						\
-  gctx *g = CREATE(gctx);						\
+  gctx *g = S_CREATE(gctx);						\
   g->h.ops = &gops;							\
   pre##_macinit(&g->c, &gk->k);						\
   return (&g->h);							\
@@ -212,7 +225,7 @@ static ghash *gkinit(gmac *m)						\
 									\
 static gmac *gkey(const void *k, size_t sz)				\
 {									\
-  gkctx *gk = CREATE(gkctx);						\
+  gkctx *gk = S_CREATE(gkctx);						\
   gk->m.ops = &gkops;							\
   pre##_hmacinit(&gk->k, k, sz);					\
   return (&gk->m);							\
@@ -233,19 +246,29 @@ static void ghdone(ghash *h, void *buf)					\
 static void ghdestroy(ghash *h)						\
 {									\
   gctx *g = (gctx *)h;							\
-  DESTROY(g);								\
+  BURN(*g);								\
+  S_DESTROY(g);								\
 }									\
 									\
 static void gkdestroy(gmac *m)						\
 {									\
   gkctx *gk = (gkctx *)m;						\
-  DESTROY(gk);								\
+  BURN(*gk);								\
+  S_DESTROY(gk);							\
+}									\
+									\
+static ghash *ghinit(void)						\
+{									\
+  assert(((void)"Attempt to instantiate an unkeyed MAC", 0));		\
+  return (0);								\
 }									\
 									\
-const gcmac pre##_hmac = { { #pre "-hmac", PRE##_HASHSZ }, gkey };	\
-static const gmac_ops gkops = { &pre##_hmac.b, gkinit, gkdestroy };	\
+const gcmac pre##_hmac =						\
+  { #pre "-hmac", PRE##_HASHSZ, pre##_mackeysz, gkey };			\
+static const gmac_ops gkops = { &pre##_hmac, gkinit, gkdestroy };	\
+static const gchash gch = { #pre "-hmac", PRE##_HASHSZ, ghinit };	\
 static const ghash_ops gops =						\
-  { &pre##_hmac.b, ghhash, ghdone, ghdestroy };				\
+  { &gch, ghhash, ghdone, ghdestroy };					\
 									\
 HMAC_TEST(PRE, pre)