}
    }

    companion object {
      private const val DEFAULT_DURATION_MILLIS = 1000L * 60 * 60 * 24 // 24 hours.
    }
  }

  companion object {
    private val PEM_REGEX = Regex("""-----BEGIN ([!-,.-~ ]*)-----([^-]*)-----END \1-----""")

    /**
     * Decodes a multiline string that contains both a [certificate][certificatePem] and a