X-Git-Url: https://git.distorted.org.uk/u/mdw/catacomb/blobdiff_plain/110003521b1a9e8f7f5d136d458195f505eea675..5d4fee2a9d2ecf4d2566c0deca27e1878bf2380f:/gfshare.h

diff --git a/gfshare.h b/gfshare.h
index 2d0f73e..fe09d8a 100644
--- a/gfshare.h
+++ b/gfshare.h
@@ -1,6 +1,6 @@
 /* -*-c-*-
  *
- * $Id: gfshare.h,v 1.5 2000/06/24 19:11:47 mdw Exp $
+ * $Id: gfshare.h,v 1.6 2000/12/06 20:30:10 mdw Exp $
  *
  * Secret sharing over %$\gf{2^8}$%
  *
@@ -30,6 +30,10 @@
 /*----- Revision history --------------------------------------------------* 
  *
  * $Log: gfshare.h,v $
+ * Revision 1.6  2000/12/06 20:30:10  mdw
+ * Change secret sharing interface: present the secret at share
+ * construction time.
+ *
  * Revision 1.5  2000/06/24 19:11:47  mdw
  * Fix daft error in the comment for @gfshare_get@.
  *
@@ -88,11 +92,10 @@ typedef struct gfshare {
   unsigned t;				/* Threshold */
   unsigned i;				/* Next free slot in vector */
   size_t sz;				/* Size of the secret and shares */
-  void *s;				/* The secret */
   octet *v;				/* Vector of share information */
 } gfshare;
 
-#define GFSHARE_INIT(t, sz) { t, 0, sz, 0, 0 }
+#define GFSHARE_INIT(t, sz) { t, 0, sz, 0 }
 
 /*----- Functions provided ------------------------------------------------*/
 
@@ -126,18 +129,20 @@ extern void gfshare_destroy(gfshare */*s*/);
  *
  * Arguments:	@gfshare *s@ = pointer to share context to fill in
  *		@grand *r@ = pointer to random number source
+ *		@const void *buf@ = pointer to the secret to share
  *
  * Returns:	---
  *
  * Use:		Initializes a sharing context to be able to create shares.
  *		The context structure is expected to be mostly filled in.  In
- *		particular, @t@ and @s@ must be initialized.  If @v@ is zero,
- *		a vector of appropriate size is allocated.  You should use
- *		the macro @GFSHARE_INIT@ or @gfshare_create@ to construct
- *		sharing contexts.
+ *		particular, @t@ must be initialized.  If @v@ is zero, a
+ *		vector of appropriate size is allocated.  You should use the
+ *		macro @GFSHARE_INIT@ or @gfshare_create@ to construct sharing
+ *		contexts.
  */
 
-extern void gfshare_mkshares(gfshare */*s*/, grand */*r*/);
+extern void gfshare_mkshares(gfshare */*s*/, grand */*r*/,
+			     const void */*buf*/);
 
 /* --- @gfshare_get@ --- *
  *