On top of that, I created the 2nd workspace a week into the initial 30-day trial, so it says the first workspace has 3. I haven’t used Sketch for any large projects and I have seen some posts here recently complaining about Sketchs performance. So Ive been on the Sketch trial for the past month and am considering purchasing the Mac app.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. A Valentine to precise (). Those three issues aside, Autosketch 10 is a very capable package (new users must be prepared to take the time to learn how to use it) more than sufficient for architectural, mechanical. The price has more than doubled from version 9 which is not really excusable in my opinion considering the issues with the autocad format printer problem. What are you waiting for Try it out today Happy.3.
I'm writing this for educational purpose only, but we all have to admit Sketch.app is a bit too expensive. You can use Paint X like a digital sketchpad to draw, color.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. 2.99 DOWNLOAD Sketches for Pages Sketches for Pages collection by Alungu Paint X is the highest rated Microsoft Paint replacement app for your Mac Book or iMac. DOWNLOAD Sketch Pad Viewer With Sketch Pad Viewer, you can open, browse, and print Sketch Pad 3 /. 14.99 DOWNLOAD Sketch Cache Cleaner Sketch Cache Cleaner is an application that deletes hidden Sketch history files. Mirror any Mac app on your iPad, with full touch support and gestures.Sketcher Sketcher can easily turn any digital photo into the pencil sketch, watercolor. To import, just drag your executable to project view in Ghidra. The only thing you have to do is copy Sketch in the same directory with a different name.Open up Ghidra and create a new project importing Sketch executable from above views. The usual location for this executable is in /Applications/Sketch.app/Contents/MacOS. Warming upI highly advice you to create a backup of your Sketch.app (later refered only as Sketch) executable. The first and foremost is using XREF string trial days remaining which is shown while starting up the Sketch. Now double click on the Sketch from Ghidra project three and let Ghidra analyze the project in full (may take a couple of minutes).There are different ways to find where the trial implementation takes a place. This will ease up your reverse engineering if you need to stop and continue to work later on. Sketch 3 Trial License Is InOne 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. The interesting parameter is param_1. Since the above string is directly referencing to method numberOfDaysLeftInTrialMode, we can also search for that string excatly in the same window.When we point Ghidra to this function, we can see the next pseudo-code which accepts two parameters. 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. If we search for method called first ( remainingTimeInterval), we can see we were pretty right about two possible license classes references through BCLicenseManager.We will work with-in BCRegularLicense since we don't need to deal with cloud protection and adding stuff to /etc/hosts. Long_long numberOfDaysLeftInTrialMode(ID param_1,SEL param_2)UVar3 = (*(code *)_objc_msgSendSuper2)(param_1, "license") (*(code *)puVar1)(uVar3, "remainingTimeInterval") UVar4 = (*(code *)puVar1)(&_OBJC_CLASS_NSDate, "dateWithTimeIntervalSinceNow:") UVar3 = (*(code *)puVar1)(&_OBJC_CLASS_NSCalendar, "currentCalendar") UVar5 = (*(code *)puVar1)(&_OBJC_CLASS_NSDate, "date") UVar6 = (*(code *)puVar1)(uVar3, "components:fromDate:toDate:options:", 0x10,uVar5,uVar4, 0) LVar7 = (*(code *)puVar1)(uVar6, "day") Next, we have a call to function remainingTimeInterval, and later on, a calculation used for using remaining time through currentCalendar and dateWithTimeIntervalSinceNow. Go to this method in Ghidra Listing (Dissasemble) and find a ASM function which moves value of 0x1 (true) to R12B ( bVar6), at address 0x1004a2a50.1004a2a4b 41 ff d5 CALL R13=>_stubs::_objc_release undefined _objc_release()To patch your executable, right click on the instruction on this address and click Patch Instruction, or rather you can select the address and press keyboard shortcut Shift+Command+G. Pathching it upIf we follow the about bVar6, it can be either true for expired license, or false for unexpired license. Lets see what is inside.UVar3 = (*(code *)_objc_msgSendSuper2)(param_1, "networkTime") UVar5 = (*(code *)puVar1)(uVar3, "currentDate") CVar2 = (*(code *)puVar1)(lVar4, "containsDate:",uVar5) We basically have a simple method to check if the trial is expired or not. 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.If you scroll down a bit in a Assembly View window, you will find isExpired listed. Double remainingTimeInterval(ID param_1,SEL param_2)UVar1 = (*(code *)_objc_msgSendSuper2)(param_1, "validityInterval") UVar1 = (*(code *)puVar2)(uVar4, "endDate") UVar6 = (*(code *)puVar2)(param_1, "networkTime") UVar6 = (*(code *)puVar2)(uVar5, "currentDate") (*(code *)puVar2)(uVar1, "timeIntervalSinceDate:",uVar6) CVar3 = (*(code *)_objc_msgSendSuper2)(param_1, "isValid") Lets see what other methods are available in this class named BCRegularLicense. If license is still available for use. The final code assembly looks like this. We need to patch this instruction to jump to our patch at 0x1004a2a50. See below picture for patched ASM instruction.At address 0x1004a2a4e we see initial JMP instruction which jumps (goto) checking procedure. Unable to download office 365 for macBut similary to other anti-crack techniques, this one is easy to tackle down.While inside your Ghidra project, go to 0x1004a1724 in Dissasemble view, and you will see this code. Since we patched the binary, the signature of the app will be invalid. The Sketch tries to be smart on us it checks code signature, meaning if the code signature is not valid, it will exit upon running. |1004a2a50 41 b4 00 MOV R12B, 0x0 Always return `false` on isExpired _stubs::_objc_release] undefined _objc_release()We are not yet done. Then, rename and chmod your executable. Move this file to Sketch.App bundle in /Applications directory. Code Sign the BinaryOnce you exported your binary you will get Sketch.bin to your export location. LAB_1004a186b XREF: 1004a180f(j)1004a186e 41 ff d6 CALL R14=>_stubs::_objc_release undefined _objc_release()1004a1874 41 ff d6 CALL R14=>_stubs::_objc_release undefined _objc_release()1004a1879 74 1b JZ LAB_1004a1896 Replace with JNZBoth of this functions reference to FUN_1004a1896 (Exit upon Invalid Code Sign), so we had to fix those to bypass this check.Export your binary in Ghidra through Export Program function. # Sign the application$ codesign -deep -force -s "signature" /Applications/Sketch. Enter your name and make sure to select a proper Certificate Type.Now codesign your new binary file. Then go to Keychain Access in the menubar, select Certificate Assistant and click Create a Certificate. Create a new certificateTo create a certificate, open up Keychain Access in MacOS. I had to remove empty padding sections from application signature first.
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