OpenJDK / jdk8u / jdk8u / jdk
changeset 12367:d99101781d7e
8178135: Additional elliptic curve support
Reviewed-by: mullan
| author | igerasim |
|---|---|
| date | Tue, 23 May 2017 11:30:25 -0700 |
| parents | 6a45e76695b7 |
| children | 3237f27a9d22 |
| files | src/share/native/sun/security/ec/impl/ecp_jac.c src/share/native/sun/security/ec/impl/ecp_jm.c |
| diffstat | 2 files changed, 19 insertions(+), 0 deletions(-) [+] |
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--- a/src/share/native/sun/security/ec/impl/ecp_jac.c Mon May 22 14:59:44 2017 -0700 +++ b/src/share/native/sun/security/ec/impl/ecp_jac.c Tue May 23 11:30:25 2017 -0700 @@ -180,6 +180,15 @@ MP_CHECKOK(group->meth->field_mul(&A, qx, &A, group->meth)); MP_CHECKOK(group->meth->field_mul(&B, qy, &B, group->meth)); + /* + * Additional checks for point equality and point at infinity + */ + if (mp_cmp(px, &A) == 0 && mp_cmp(py, &B) == 0) { + /* POINT_DOUBLE(P) */ + MP_CHECKOK(ec_GFp_pt_dbl_jac(px, py, pz, rx, ry, rz, group)); + goto CLEANUP; + } + /* C = A - px, D = B - py */ MP_CHECKOK(group->meth->field_sub(&A, px, &C, group->meth)); MP_CHECKOK(group->meth->field_sub(&B, py, &D, group->meth));
--- a/src/share/native/sun/security/ec/impl/ecp_jm.c Mon May 22 14:59:44 2017 -0700 +++ b/src/share/native/sun/security/ec/impl/ecp_jm.c Tue May 23 11:30:25 2017 -0700 @@ -165,6 +165,16 @@ MP_CHECKOK(group->meth->field_mul(A, qx, A, group->meth)); MP_CHECKOK(group->meth->field_mul(B, qy, B, group->meth)); + /* + * Additional checks for point equality and point at infinity + */ + if (mp_cmp(px, A) == 0 && mp_cmp(py, B) == 0) { + /* POINT_DOUBLE(P) */ + MP_CHECKOK(ec_GFp_pt_dbl_jm(px, py, pz, paz4, rx, ry, rz, raz4, + scratch, group)); + goto CLEANUP; + } + /* C = A - px, D = B - py */ MP_CHECKOK(group->meth->field_sub(A, px, C, group->meth)); MP_CHECKOK(group->meth->field_sub(B, py, D, group->meth));