  encrypt(packet) {
    // `packet` === unencrypted packet

    if (this._dead)
      return;

    this._onWrite(packet);

    this.outSeqno = (this.outSeqno + 1) >>> 0;
  }
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.