signatureValue =
            BitString(
              byteString = signature,
              unusedBitsCount = 0,
            ),
        )

      return HeldCertificate(subjectKeyPair, certificate.toX509Certificate())
    }

    private fun subject(): List<List<AttributeTypeAndValue>> {
      val result = mutableListOf<List<AttributeTypeAndValue>>()

      if (organizationalUnit != null) {
        result +=