#Akvis sketch 14 patch full
#Akvis sketch 14 patch trial
#Akvis sketch 14 patch license
#Akvis sketch 14 patch Offline

#Akvis sketch 14 patch trial

We basically have a simple method to check if the trial is expired or not. UVar3 = (*(code *)_objc_msgSendSuper2)(param_1, 'networkTime') If you scroll down a bit in a Assembly View window, you will find isExpired listed. First, filter the Symbol Tree window to reflect the name and once found, scroll to method_list_t where you will right click on it and use Show Reference To. Lets see what other methods are available in this class named BCRegularLicense. (*(code *)puVar2)(uVar1, 'timeIntervalSinceDate:',uVar6) Д¬Var3 = (*(code *)_objc_msgSendSuper2)(param_1, 'isValid') UVar6 = (*(code *)puVar2)(uVar5, 'currentDate') UVar6 = (*(code *)puVar2)(param_1, 'networkTime')

UVar1 = (*(code *)_objc_msgSendSuper2)(param_1, 'validityInterval') double remainingTimeInterval(ID param_1,SEL param_2) We also have isValid method notifying impl.

#Akvis sketch 14 patch license

We have some interesting functions in there called through in: validityInterval, which basically works with endTime (when license should expire) and combination of networkTime/currentTime. We will work with-in BCRegularLicense since we don't need to deal with cloud protection and adding stuff to /etc/hosts. If we search for method called first ( remainingTimeInterval), we can see we were pretty right about two possible license classes references through BCLicenseManager. Next, we have a call to function remainingTimeInterval, and later on, a calculation used for using remaining time through currentCalendar and dateWithTimeIntervalSinceNow. UVar3 = (*(code *)puVar1)(&_OBJC_CLASS_NSCalendar, 'currentCalendar') UVar4 = (*(code *)puVar1)(&_OBJC_CLASS_NSDate, 'dateWithTimeIntervalSinceNow:') (*(code *)puVar1)(uVar3, 'remainingTimeInterval') UVar3 = (*(code *)_objc_msgSendSuper2)(param_1, 'license') long_long numberOfDaysLeftInTrialMode(ID param_1,SEL param_2) So this BCLicenseManager class has license selector, that returns some license instance.

#Akvis sketch 14 patch Offline

One is used for offline activation, and the other is used for cloud-based activation. Two options are available in Sketch, if you follow the references: BCRegularLicense, and BCCloudLicense. The strict business of this parameter is to refer which kind of license is in use. When we point Ghidra to this function, we can see the next pseudo-code which accepts two parameters.

Since the above string is directly referencing to method numberOfDaysLeftInTrialMode, we can also search for that string excatly in the same window. The other way is searching for string BCLicenseManager in Symbol Tree window. The first and foremost is using XREF string trial days remaining which is shown while starting up the Sketch. There are different ways to find where the trial implementation takes a place.

#Akvis sketch 14 patch full

Now double click on the Sketch from Ghidra project three and let Ghidra analyze the project in full (may take a couple of minutes). This will ease up your reverse engineering if you need to stop and continue to work later on. Refer to Ghidra docs or this phenomenal video by Ghidra Ninja to learn more about Ghidra basics. To import, just drag your executable to project view in Ghidra. Open up Ghidra and create a new project importing Sketch executable from above views. The only thing you have to do is copy Sketch in the same directory with a different name. The usual location for this executable is in /Applications/Sketch.app/Contents/MacOS. I highly advice you to create a backup of your Sketch.app (later refered only as Sketch) executable. The version I'm working on is Sketch v63.1 (latest update). I'm writing this for educational purpose only, but we all have to admit Sketch.app is a bit too expensive. Inhere, I will show you how easily is to bypass a SketchApp Trial, using nothing more but a Ghidra SRE, and a little bit of thinkering. Therefore, this post is also contribution to her. Exchanging each other our gifts (just like in the days we were younger).

I've spent most of the day with my waifu, enjoying little bit of snow and a cup of coffee. Sketch.app macos osx reverseengineering ghidra night