}.hash()
        } ?: Hashing.newHasher().hash()
    }

    private
    fun shouldEncryptStreams(stateType: StateType) =
        isEncrypting && stateType.encryptable

    override fun outputStream(stateType: StateType, output: () -> OutputStream): OutputStream =
        if (shouldEncryptStreams(stateType))
            safeWrap(output, this::encryptingOutputStream)
        else
            output.invoke()