/* -*-c-*-
*
- * $Id: group.h,v 1.2 2004/04/03 03:32:05 mdw Exp $
+ * $Id: group.h,v 1.5 2004/04/17 09:58:37 mdw Exp $
*
* General cyclic group abstraction
*
* MA 02111-1307, USA.
*/
-/*----- Revision history --------------------------------------------------*
- *
- * $Log: group.h,v $
- * 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.
- * Generally ensure that negative exponents do inversion correctly. Add
- * table of standard prime-field subgroups. (Binary field subgroups are
- * currently unimplemented but easy to add if anyone ever finds a good one.)
- *
- */
-
#ifndef CATACOMB_GROUP_H
#define CATACOMB_GROUP_H
typedef struct group_ {
const struct group_ops *ops; /* Operations table */
size_t nbits; /* Size of an element in bits */
- size_t noctets; /* Size of an element in octets */
+ size_t noctets; /* Size of raw element in octets */
ge *i; /* Identity element */
ge *g; /* Generator element */
mp *r; /* Order of the generator */
mp *(*toint)(group */*g*/, mp */*d*/, ge */*x*/);
int (*fromint)(group */*g*/, ge */*d*/, mp */*x*/);
int (*toec)(group */*g*/, ec */*d*/, ge */*x*/);
- int (*fromec)(group */*g*/, ge */*d*/, ec */*p*/);
+ int (*fromec)(group */*g*/, ge */*d*/, const ec */*p*/);
int (*tobuf)(group */*h*/, buf */*b*/, ge */*x*/);
int (*frombuf)(group */*h*/, buf */*b*/, ge */*d*/);
+ int (*toraw)(group */*h*/, buf */*b*/, ge */*x*/);
+ int (*fromraw)(group */*h*/, buf */*b*/, ge */*d*/);
} group_ops;
#define G_FROMEC(g, d, p) (g)->ops->fromec((g), (d), (p))
#define G_TOBUF(g, b, x) (g)->ops->tobuf((g), (b), (x))
#define G_FROMBUF(g, b, d) (g)->ops->frombuf((g), (b), (d))
+#define G_TORAW(g, b, x) (g)->ops->toraw((g), (b), (x))
+#define G_FROMRAW(g, b, d) (g)->ops->fromraw((g), (b), (d))
/*----- Handy functions ---------------------------------------------------*/
*
* Arguments: @group *g@ = abstract group
* @ge *d@ = destination pointer
- * @ec *p@ = elliptic curve point
+ * @const ec *p@ = elliptic curve point
*
* Returns: Zero for success, @-1@ on failure.
*
* coordinate.
*/
-extern int group_stdfromec(group */*g*/, ge */*d*/, ec */*p*/);
+extern int group_stdfromec(group */*g*/, ge */*d*/, const ec */*p*/);
/*----- Prime field subgroups ---------------------------------------------*/