fn verifiable_bad_public_key()

in src/voprf.rs [715:738]

• 23 lines of code
• 1 McCabe index (conditional complexity)

    fn verifiable_bad_public_key<CS: CipherSuite>()
    where
        <CS::Hash as OutputSizeUser>::OutputSize:
            IsLess<U256> + IsLessOrEqual<<CS::Hash as BlockSizeUser>::BlockSize>,
    {
        let input = b"input";
        let mut rng = OsRng;
        let client_blind_result = VoprfClient::<CS>::blind(input, &mut rng).unwrap();
        let server = VoprfServer::<CS>::new(&mut rng).unwrap();
        let server_result = server.evaluate(&mut rng, &client_blind_result.message);
        let wrong_pk = {
            let dst = GenericArray::from(STR_HASH_TO_GROUP)
                .concat(create_context_string::<CS>(Mode::Oprf));
            // Choose a group element that is unlikely to be the right public key
            CS::Group::hash_to_curve::<CS>(&[b"msg"], &dst).unwrap()
        };
        let client_finalize_result = client_blind_result.state.finalize(
            input,
            &server_result.message,
            &server_result.proof,
            wrong_pk,
        );
        assert!(client_finalize_result.is_err());
    }