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ecc.[ch]: add elliptic-curve point_copy_into functions.

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This will let my upcoming new test of memory access patterns run a
sequence of tests on different elliptic-curve data which is stored at
the same address each time.
This commit is contained in:
Simon Tatham
2019-02-09 17:50:27 +00:00
parent 30117bff55
commit f659614272
2 changed files with 28 additions and 0 deletions
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23
ecc.c
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@ -112,6 +112,14 @@ WeierstrassPoint *ecc_weierstrass_point_new_identity(WeierstrassCurve *wc)
return wp;
}
void ecc_weierstrass_point_copy_into(
WeierstrassPoint *dest, WeierstrassPoint *src)
{
mp_copy_into(dest->X, src->X);
mp_copy_into(dest->Y, src->Y);
mp_copy_into(dest->Z, src->Z);
}
WeierstrassPoint *ecc_weierstrass_point_copy(WeierstrassPoint *orig)
{
WeierstrassPoint *wp = ecc_weierstrass_point_new_empty(orig->wc);
@ -610,6 +618,13 @@ MontgomeryPoint *ecc_montgomery_point_new(MontgomeryCurve *mc, mp_int *x)
return mp;
}
void ecc_montgomery_point_copy_into(
MontgomeryPoint *dest, MontgomeryPoint *src)
{
mp_copy_into(dest->X, src->X);
mp_copy_into(dest->Z, src->Z);
}
MontgomeryPoint *ecc_montgomery_point_copy(MontgomeryPoint *orig)
{
MontgomeryPoint *mp = ecc_montgomery_point_new_empty(orig->mc);
@ -904,6 +919,14 @@ EdwardsPoint *ecc_edwards_point_new(
ec, monty_import(ec->mc, x), monty_import(ec->mc, y));
}
void ecc_edwards_point_copy_into(EdwardsPoint *dest, EdwardsPoint *src)
{
mp_copy_into(dest->X, src->X);
mp_copy_into(dest->Y, src->Y);
mp_copy_into(dest->Z, src->Z);
mp_copy_into(dest->T, src->T);
}
EdwardsPoint *ecc_edwards_point_copy(EdwardsPoint *orig)
{
EdwardsPoint *ep = ecc_edwards_point_new_empty(orig->ec);