BN_GF2m_mod_solve_quad_arr
ret = BN_GF2m_mod_solve_quad_arr(r, a, arr, ctx);
if (!BN_GF2m_mod_solve_quad_arr(z, tmp, group->poly, ctx)) {
int BN_GF2m_mod_solve_quad_arr(BIGNUM *r, const BIGNUM *a,