func (s *secret) Inv(x abstract.Secret) abstract.Secret {
xs := x.(*secret)
if C.BN_mod_inverse(s.bignum.bn, xs.bignum.bn, s.c.n.bn,
s.c.ctx) == nil {
panic("BN_mod_inverse: " + getErrString())
}
return s
}
func (s *secret) Div(x, y abstract.Secret) abstract.Secret {
xs := x.(*secret)
ys := y.(*secret)
// First compute inverse of y, then multiply by x.
// Must use a temporary in the case x == s.
t := &s.bignum
if x == s {
t = newBigNum()
}
if C.BN_mod_inverse(t.bn, ys.bignum.bn, s.c.n.bn,
s.c.ctx) == nil {
panic("BN_mod_inverse: " + getErrString())
}
if C.BN_mod_mul(s.bignum.bn, xs.bignum.bn, t.bn, s.c.n.bn,
s.c.ctx) == 0 {
panic("BN_mod_mul: " + getErrString())
}
return s
}