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More optimisations for EC P-256 "i15" (specialised squaring function, mixed coordinates addition with a 4-bit window when the base point is the conventional generator).

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This commit is contained in:
Thomas Pornin 2017-01-13 05:10:43 +01:00
parent 21743ae69e
commit 44c79c1add
14 changed files with 804 additions and 56 deletions
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8
src/ssl/ssl_hs_server.c
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@ -236,7 +236,7 @@ do_ecdhe_part1(br_ssl_server_context *ctx, int curve)
{
int hash;
unsigned mask;
const unsigned char *order, *generator;
const unsigned char *order;
size_t olen, glen;
br_multihash_context mhc;
unsigned char head[4];
@ -268,6 +268,8 @@ do_ecdhe_part1(br_ssl_server_context *ctx, int curve)
/*
* Compute our ECDH point.
*/
#if 0
/* obsolete */
generator = ctx->eng.iec->generator(curve, &glen);
memcpy(ctx->eng.ecdhe_point, generator, glen);
ctx->eng.ecdhe_point_len = glen;
@ -276,6 +278,10 @@ do_ecdhe_part1(br_ssl_server_context *ctx, int curve)
{
return -BR_ERR_INVALID_ALGORITHM;
}
#endif
glen = ctx->eng.iec->mulgen(ctx->eng.ecdhe_point,
ctx->ecdhe_key, olen, curve);
ctx->eng.ecdhe_point_len = glen;
/*
* Compute the signature.