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Cache pre-computed points for ecp_mul()

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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).
This commit is contained in:
Manuel Pégourié-Gonnard 2013-09-17 19:13:10 +02:00 • committed by Paul Bakker
parent 56cd319f0e
commit 161ef968db
6 changed files with 147 additions and 47 deletions
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4
include/polarssl/ecdsa.h
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@ -63,7 +63,7 @@ extern "C" {
* \return 0 if successful,
* or a POLARSSL_ERR_ECP_XXX or POLARSSL_MPI_XXX error code
*/
int ecdsa_sign( const ecp_group *grp, mpi *r, mpi *s,
int ecdsa_sign( ecp_group *grp, mpi *r, mpi *s,
const mpi *d, const unsigned char *buf, size_t blen,
int (*f_rng)(void *, unsigned char *, size_t), void *p_rng );
@ -81,7 +81,7 @@ int ecdsa_sign( const ecp_group *grp, mpi *r, mpi *s,
* POLARSSL_ERR_ECP_BAD_INPUT_DATA if signature is invalid
* or a POLARSSL_ERR_ECP_XXX or POLARSSL_MPI_XXX error code
*/
int ecdsa_verify( const ecp_group *grp,
int ecdsa_verify( ecp_group *grp,
const unsigned char *buf, size_t blen,
const ecp_point *Q, const mpi *r, const mpi *s);