fn test_agreement_x25519()

in aws-lc-rs/src/agreement.rs [825:881]

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

    fn test_agreement_x25519() {
        let alg = &X25519;
        let peer_public = UnparsedPublicKey::new(
            alg,
            test::from_dirty_hex(
                "e6db6867583030db3594c1a424b15f7c726624ec26b3353b10a903a6d0ab1c4c",
            ),
        );

        let my_private = test::from_dirty_hex(
            "a546e36bf0527c9d3b16154b82465edd62144c0ac1fc5a18506a2244ba449ac4",
        );

        let my_private = {
            let rng = test::rand::FixedSliceRandom { bytes: &my_private };
            PrivateKey::generate_for_test(alg, &rng).unwrap()
        };

        let my_public = test::from_dirty_hex(
            "1c9fd88f45606d932a80c71824ae151d15d73e77de38e8e000852e614fae7019",
        );
        let output = test::from_dirty_hex(
            "c3da55379de9c6908e94ea4df28d084f32eccf03491c71f754b4075577a28552",
        );

        assert_eq!(my_private.algorithm(), alg);

        let be_private_key_buffer: Curve25519SeedBin = my_private.as_be_bytes().unwrap();
        let be_private_key =
            PrivateKey::from_private_key(&X25519, be_private_key_buffer.as_ref()).unwrap();
        {
            let result = agree(&be_private_key, &peer_public, (), |key_material| {
                assert_eq!(key_material, &output[..]);
                Ok(())
            });
            assert_eq!(result, Ok(()));
        }

        let computed_public = my_private.compute_public_key().unwrap();
        assert_eq!(computed_public.as_ref(), &my_public[..]);

        assert_eq!(computed_public.algorithm(), alg);
        {
            let result = agree(&my_private, &peer_public, (), |key_material| {
                assert_eq!(key_material, &output[..]);
                Ok(())
            });
            assert_eq!(result, Ok(()));
        }
        {
            let result = agree(&my_private, &peer_public, (), |key_material| {
                assert_eq!(key_material, &output[..]);
                Ok(())
            });
            assert_eq!(result, Ok(()));
        }
    }