code: function keyIdCheck(keyId, key) {
    if (keyId.length === 16) {
      return keyId === key.getKeyId().toHex();
    }
    return keyId === key.getFingerprint();
  }
docs: Checks a key to see if it matches the specified keyid
  @private
  @param {String} keyId provided as string of lowercase hex number
  withouth 0x prefix (can be 16-character key ID or fingerprint)
  @param {module:key.Key|module:key.SubKey} key The key to be checked
  @returns {Boolean} True if key has the specified keyid