bn_sqr_recursive
void bn_sqr_recursive(BN_ULONG *r, const BN_ULONG *a, int n2, BN_ULONG *t);
bn_sqr_recursive(&(t[n2]), t, n, p);
bn_sqr_recursive(r, a, n, p);
bn_sqr_recursive(&(r[n2]), &(a[n]), n, p);
bn_sqr_recursive(rr->d, a->d, al, tmp->d);