Function DH_meth_set_bn_mod_exp

pub unsafe extern "C" fn DH_meth_set_bn_mod_exp(
    dhm: *mut dh_method,
    bn_mod_exp: 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>,
) -> i32