Date Lock

Description

Date Lock locks the code to a period of time. There are three ways to lock your code to a period of time:

• Lock the code to only allow execution after a specific date (known as startDate)
• Lock the code to expire after a specific date (known as endDate)
• Lock the code to only allow execution between two dates (startDate and endDate)

This is a good transformation to enforce license agreements. Countermeasures can be specified (optionally) to be executed when the code is executed in an invalid period of time.

Consider combining this transformation with obfuscation transformations to harden the resulting code making it more resilient to automated de-obfuscator tools and harder to understand by a human. You may also find useful to combine this transformation with other locks:

• Browser Lock
• Domain Lock
• OS Lock

Code Annotation Example

// @jscrambler define dateLock {startDate: 2017/01/01, endDate: 2020/12/31, countermeasures: {deleteCookies: 1, redirect: https://www.example.com}} as dl1
// @jscrambler enable dl1

Option Types

Name	Required	Default Value	Description
startDate	Yes	N/A	The code won't run in a date that is previous to the startDate.
endDate	Yes	N/A	The code won't run in a date after the endDate.
countermeasures	Yes	{"deleteCookies": false,"breakApplication": true,"realTimeNotifications": false,"dataExfiltrationPrevention": false,"selfDestruct": false}	List of available countermeasures

Countermeasures

Name	Description
customCallback	Name of the function to be called as a countermeasure.
deleteCookies	Deletes all the cookies accessible via JavaScript.
redirect	Redirects the user to a specific URL.
breakApplication	Breaks the application's functionality.
realTimeNotifications	Sends a notification when a violation occurs.
dataExfiltrationPrevention	Prevents a malicious actor from carrying out an unauthorized data transfer by blocking network requests.
selfDestruct	Attempts to damage the state and behavior of the application and/or the environment that is running the application.

Browser Compatibility

Browser	Compatible Versions	Tested Versions	Notes
Chrome	80+	80+
Firefox	90+	90+
Internet Explorer	9+	8+
Microsoft Edge	116+	116+
Safari	13.1+	13.1+

API Parameters

Example:

{
  "keys": {
    "accessKey": "XXXXXX",
    "secretKey": "YYYYYY"
  },
  "applicationId": "ZZZZZZ",
  "params": [
    {
      "name": "dateLock",
      "options": {
        "startDate": "2016-06-01",
        "endDate": "2016-06-01",
        "countermeasures": {
          "customCallback": null,
          "deleteCookies": false,
          "redirect": null,
          "breakApplication": true,
          "realTimeNotifications": false,
          "dataExfiltrationPrevention": false,
          "selfDestruct": false
        }
      }
    }
  ]
}