func (s *secret) Neg(x abstract.Secret) abstract.Secret {
xs := x.(*secret)
if C.BN_mod_sub(s.bignum.bn, s.c.n.bn, xs.bignum.bn, s.c.n.bn,
s.c.ctx) == 0 {
panic("BN_mod_sub: " + getErrString())
}
return s
}
func (s *scalar) Sub(x, y abstract.Scalar) abstract.Scalar {
xs := x.(*scalar)
ys := y.(*scalar)
if C.BN_mod_sub(s.bignum.bn, xs.bignum.bn, ys.bignum.bn, s.c.n.bn,
s.c.ctx) == 0 {
panic("BN_mod_sub: " + getErrString())
}
return s
}