private static HybridTestVector createTestVector5() throws GeneralSecurityException {
    HpkeParameters params =
        HpkeParameters.builder()
            .setVariant(HpkeParameters.Variant.NO_PREFIX)
            .setKemId(HpkeParameters.KemId.DHKEM_P256_HKDF_SHA256)
            .setKdfId(HpkeParameters.KdfId.HKDF_SHA512)
            .setAeadId(HpkeParameters.AeadId.AES_128_GCM)
            .build();
    HpkePublicKey publicKey =
        HpkePublicKey.create(params, getP256PublicPointAsBytes(), /* idRequirement= */ null);

    HpkePrivateKey privateKey = HpkePrivateKey.create(publicKey, getPrivateP256Value());

    return new HybridTestVector(
        privateKey,
        new byte[] {0x01},
        new byte[] {0x02},
        Hex.decode(
            "0497d2aacbd0988f5dcd5284ff9690aead47a405f03b558844b41153aced5c884303d3273d09a52c53f754"
                + "30ef68ebf7c6120a2412b9396a871fc0e1b6b6f0ee6bb86bbef7467aaea10274042ee7e880f5"
                + "16"));
  }
Test vectors for HPKE. Generated by hand from the implementation here.
java_src/src/main/java/com/google/crypto/tink/hybrid/internal/testing/HpkeTestUtil.java