@Test
public void validateKey_valid32ByteKey_works() throws Exception {

  manager.validateKey(
      HkdfPrfKey.newBuilder()
          .setVersion(0)
          .setKeyValue(ByteString.copyFrom(Random.randBytes(32)))
          .setParams(HkdfPrfParams.newBuilder().setHash(HashType.SHA256))
          .build());
}