Pollard's rho algorithm for computing discrete logs.

[u/mdw/catacomb] / ghash-def.h

diff --git a/ghash-def.h b/ghash-def.h
index db87d1f..d8dfc3c 100644 (file)
--- a/ghash-def.h
+++ b/ghash-def.h
@@ -1,6 +1,6 @@
 /* -*-c-*-
  *
- * $Id: ghash-def.h,v 1.2 2000/06/17 11:22:03 mdw Exp $
+ * $Id: ghash-def.h,v 1.3 2000/07/02 18:27:42 mdw Exp $
  *
  * Definitions for generic hash interface
  *
@@ -30,6 +30,12 @@
 /*----- Revision history --------------------------------------------------* 
  *
  * $Log: ghash-def.h,v $
+ * 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
+ * address of the buffer it used.  Clients of generic hashes no longer need
+ * to use dynamically allocated memory for hash results.
+ *
  * Revision 1.2  2000/06/17 11:22:03  mdw
  * Use secure arena for memory allocation.  Minor changes in the generic
  * hash interface.
@@ -75,6 +81,7 @@ static const ghash_ops gops;                                          \
 typedef struct gctx {                                                  \
   ghash h;                                                             \
   pre##_ctx c;                                                         \
+  octet buf[PRE##_HASHSZ];                                             \
 } gctx;                                                                        \
                                                                        \
 static ghash *ghinit(void)                                             \
@@ -91,10 +98,13 @@ static void ghhash(ghash *h, const void *p, size_t sz)                      \
   pre##_hash(&g->c, p, sz);                                            \
 }                                                                      \
                                                                        \
-static void ghdone(ghash *h, void *buf)                                        \
+static octet *ghdone(ghash *h, void *buf)                              \
 {                                                                      \
   gctx *g = (gctx *)h;                                                 \
+  if (!buf)                                                            \
+    buf = g->buf;                                                      \
   pre##_done(&g->c, buf);                                              \
+  return (buf);                                                                \
 }                                                                      \
                                                                        \
 static void ghdestroy(ghash *h)                                                \