Mercurial > hg > openjdk > jdk9 > jdk
changeset 17281:f8955f187094
8178135: Additional elliptic curve support
Reviewed-by: mullan
| author | vinnie |
|---|---|
| date | Tue, 23 May 2017 16:59:50 +0100 |
| parents | f09a6beb1e23 |
| children | 763a4750255b |
| files | src/jdk.crypto.ec/share/native/libsunec/impl/ecp_jac.c src/jdk.crypto.ec/share/native/libsunec/impl/ecp_jm.c |
| diffstat | 2 files changed, 19 insertions(+), 0 deletions(-) [+] |
line wrap: on
line diff
--- a/src/jdk.crypto.ec/share/native/libsunec/impl/ecp_jac.c Fri May 12 17:30:47 2017 +0100 +++ b/src/jdk.crypto.ec/share/native/libsunec/impl/ecp_jac.c Tue May 23 16:59:50 2017 +0100 @@ -181,6 +181,15 @@ 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/jdk.crypto.ec/share/native/libsunec/impl/ecp_jm.c Fri May 12 17:30:47 2017 +0100 +++ b/src/jdk.crypto.ec/share/native/libsunec/impl/ecp_jm.c Tue May 23 16:59:50 2017 +0100 @@ -166,6 +166,16 @@ 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));