rdnSequence,
    )

  /**
   * ```
   * SubjectPublicKeyInfo ::= SEQUENCE  {
   *   algorithm            AlgorithmIdentifier,
   *   subjectPublicKey     BIT STRING
   * }
   * ```
   */
  internal val subjectPublicKeyInfo: BasicDerAdapter<SubjectPublicKeyInfo> =
    Adapters.sequence(
      "SubjectPublicKeyInfo",
      algorithmIdentifier,
      Adapters.BIT_STRING,
      decompose = {

        keySize = 2048
      }

    fun build(): HeldCertificate {
      // Subject keys & identity.
      val subjectKeyPair = keyPair ?: generateKeyPair()
      val subjectPublicKeyInfo =
        CertificateAdapters.subjectPublicKeyInfo.fromDer(
          subjectKeyPair.public.encoded.toByteString(),
        )
      val subject: List<List<AttributeTypeAndValue>> = subject()