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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
library/ecdsa.c
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@ -51,7 +51,7 @@ static int derive_mpi( const ecp_group *grp, mpi *x,
* Compute ECDSA signature of a hashed message (SEC1 4.1.3)
* Obviously, compared to SEC1 4.1.3, we skip step 4 (hash message)
*/
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 )
{
@ -117,7 +117,7 @@ cleanup:
* Verify ECDSA signature of hashed message (SEC1 4.1.4)
* Obviously, compared to SEC1 4.1.3, we skip step 2 (hash message)
*/
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)
{