X-Git-Url: https://git.distorted.org.uk/u/mdw/catacomb/blobdiff_plain/34e4f738bcba58e6d8c4cabbb0b3232a65b42a9d..0f3faccdf5f2f0cfa40bd9bec495c4930052a51f:/g-ec.c

diff --git a/g-ec.c b/g-ec.c
index 1f214f7..dcf8a10 100644
--- a/g-ec.c
+++ b/g-ec.c
@@ -1,6 +1,6 @@
 /* -*-c-*-
  *
- * $Id: g-ec.c,v 1.1 2004/04/01 12:50:09 mdw Exp $
+ * $Id: g-ec.c,v 1.3 2004/04/04 19:04:11 mdw Exp $
  *
  * Abstraction for elliptic curve groups
  *
@@ -30,6 +30,12 @@
 /*----- Revision history --------------------------------------------------* 
  *
  * $Log: g-ec.c,v $
+ * Revision 1.3  2004/04/04 19:04:11  mdw
+ * Raw I/O of elliptic curve points and group elements.
+ *
+ * Revision 1.2  2004/04/03 03:32:05  mdw
+ * General robustification.
+ *
  * Revision 1.1  2004/04/01 12:50:09  mdw
  * Add cyclic group abstraction, with test code.  Separate off exponentation
  * functions for better static linking.  Fix a buttload of bugs on the way.
@@ -47,6 +53,7 @@
 
 #define ge ec
 #include "group.h"
+#include "ec-raw.h"
 
 /*----- Data structures ---------------------------------------------------*/
 
@@ -179,6 +186,19 @@ static int gfrombuf(group *gg, buf *b, ec *d) {
   if (!rc) EC_COPY(d, &t); EC_DESTROY(&t); return (rc);
 }
 
+static int gtoraw(group *gg, buf *b, ec *x) {
+  gctx *g = (gctx *)gg; ec t = EC_INIT; int rc;
+  EC_OUT(g->ei.c, &t, x); rc = ec_putraw(g->ei.c, b, &t);
+  EC_DESTROY(&t); return (rc);
+}
+
+static int gfromraw(group *gg, buf *b, ec *d) {
+  gctx *g = (gctx *)gg; ec t = EC_INIT; int rc;
+  if (ec_getraw(g->ei.c, b, &t)) return (-1);
+  EC_IN(g->ei.c, &t, &t); rc = EC_CHECK(g->ei.c, &t);
+  if (!rc) EC_COPY(d, &t); EC_DESTROY(&t); return (rc);
+}
+
 /* --- @group_ec@ --- *
  *
  * Arguments:	@const ec_info *ei@ = elliptic curve parameters
@@ -199,7 +219,7 @@ static const group_ops gops = {
   gcheck,
   gmul, gsqr, ginv, gdiv, gexp, gmexp,
   gread, gwrite,
-  gtoint, gfromint, gtoec, gfromec, gtobuf, gfrombuf
+  gtoint, gfromint, gtoec, gfromec, gtobuf, gfrombuf, gtoraw, gfromraw
 };
 
 group *group_ec(const ec_info *ei)
@@ -208,11 +228,12 @@ group *group_ec(const ec_info *ei)
 
   g->g.ops = &gops;
   g->g.nbits = ei->c->f->nbits * 2;
-  g->g.noctets = ei->c->f->noctets * 2;
+  g->g.noctets = ei->c->f->noctets * 2 + 1;
   g->ei = *ei;
   EC_CREATE(&g->id);
   g->g.i = &g->id;
   EC_CREATE(&g->gen);
+  g->g.g = &g->gen;
   EC_IN(g->ei.c, &g->gen, &ei->g);
   g->g.r = ei->r;
   g->g.h = ei->h;