}

  fun writeOctetString(byteString: ByteString) {
    sink().write(byteString)
  }

  fun writeUtf8(value: String) {
    sink().writeUtf8(value)
  }

  fun writeObjectIdentifier(s: String) {
    val utf8 = Buffer().writeUtf8(s)
    val v1 = utf8.readDecimalLong()
    require(utf8.readByte() == '.'.code.toByte())
    val v2 = utf8.readDecimalLong()
    writeVariableLengthLong(v1 * 40 + v2)

          override fun decode(reader: DerReader): String = reader.readObjectIdentifier()

          override fun encode(
            writer: DerWriter,
            value: String,
          ) = writer.writeObjectIdentifier(value)
        },
    )

  val UTF8_STRING =
    BasicDerAdapter(
      name = "UTF8",
      tagClass = DerHeader.TAG_CLASS_UNIVERSAL,
      tag = 12L,
      codec =

    val buffer = Buffer()
    val derWriter = DerWriter(buffer)

    derWriter.write(
      name = "test",
      tagClass = DerHeader.TAG_CLASS_UNIVERSAL,
      tag = 6L,
    ) {
      derWriter.writeObjectIdentifier("2.999.3")
    }

    assertThat(buffer.readByteString()).isEqualTo("0603883703".decodeHex())
  }

  @Test fun `decode relative object identifier`() {
    val buffer =
      Buffer()