class HkdfPrfKeyManager extends KeyTypeManager<HkdfPrfKey> {

  public static final KeyTemplate hkdfSha256Template() {
    HkdfPrfKeyFormat format =
        HkdfPrfKeyFormat.newBuilder()
            .setKeySize(32) // the size in bytes of the HKDF key
            .setParams(HkdfPrfParams.newBuilder().setHash(HashType.SHA256))
            .build();
    return KeyTemplate.create(
        HkdfPrfKeyManager.staticKeyType(), format.toByteArray(), KeyTemplate.OutputPrefixType.RAW);
  }

    HkdfPrfKeyManager();

}