function genOpenSSLEdPriv(priv) {
  const asnWriter = new Ber.Writer();
  asnWriter.startSequence();
    // version
    asnWriter.writeInt(0x00, Ber.Integer);

    // algorithm
    asnWriter.startSequence();
      asnWriter.writeOID('1.3.101.112'); // id-Ed25519
    asnWriter.endSequence();

    // PrivateKey
    asnWriter.startSequence(Ber.OctetString);
      asnWriter.writeBuffer(priv, Ber.OctetString);
    asnWriter.endSequence();
  asnWriter.endSequence();
  return makePEM('PRIVATE', asnWriter.buffer);
}
The software constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.