Cache pre-computed points for ecp_mul()
Up to 1.25 speedup on ECDSA sign for small curves, but mainly useful as a
preparation for fixed-point mult (a few prototypes changed in constness).
diff --git a/include/polarssl/ecdh.h b/include/polarssl/ecdh.h
index 0fa2dfa..81c8f93 100644
--- a/include/polarssl/ecdh.h
+++ b/include/polarssl/ecdh.h
@@ -62,7 +62,7 @@
* \return 0 if successful,
* or a POLARSSL_ERR_ECP_XXX or POLARSSL_MPI_XXX error code
*/
-int ecdh_gen_public( const ecp_group *grp, mpi *d, ecp_point *Q,
+int ecdh_gen_public( ecp_group *grp, mpi *d, ecp_point *Q,
int (*f_rng)(void *, unsigned char *, size_t),
void *p_rng );
@@ -83,7 +83,7 @@
* countermeasures against potential elaborate timing
* attacks, see \c ecp_mul() for details.
*/
-int ecdh_compute_shared( const ecp_group *grp, mpi *z,
+int ecdh_compute_shared( ecp_group *grp, mpi *z,
const ecp_point *Q, const mpi *d,
int (*f_rng)(void *, unsigned char *, size_t),
void *p_rng );