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8178135: Additional elliptic curve support

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Reviewed-by: mullan
This commit is contained in:
Vinnie Ryan 2017-05-23 16:59:50 +01:00
parent d137e5465c
commit 3916dd5061
2 changed files with 19 additions and 0 deletions
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9
jdk/src/jdk.crypto.ec/share/native/libsunec/impl/ecp_jac.c
View File

@ -181,6 +181,15 @@ ec_GFp_pt_add_jac_aff(const mp_int *px, const mp_int *py, const mp_int *pz,
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));

10
jdk/src/jdk.crypto.ec/share/native/libsunec/impl/ecp_jm.c
View File

@ -166,6 +166,16 @@ ec_GFp_pt_add_jm_aff(const mp_int *px, const mp_int *py, const mp_int *pz,
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));