pub unsafe extern "C" fn DH_meth_get_bn_mod_exp(
dhm: *const dh_method,
) -> Option<unsafe extern "C" fn(_: *const dh_st, _: *mut bignum_st, _: *const bignum_st, _: *const bignum_st, _: *const bignum_st, _: *mut bignum_ctx, _: *mut bn_mont_ctx_st) -> i32>