this post was submitted on 12 Sep 2023
1191 points (97.9% liked)

linuxmemes

21393 readers
1177 users here now

Hint: :q!


Sister communities:


Community rules (click to expand)

1. Follow the site-wide rules

2. Be civil
  • Understand the difference between a joke and an insult.
  • Do not harrass or attack members of the community for any reason.
  • Leave remarks of "peasantry" to the PCMR community. If you dislike an OS/service/application, attack the thing you dislike, not the individuals who use it. Some people may not have a choice.
  • Bigotry will not be tolerated.
  • These rules are somewhat loosened when the subject is a public figure. Still, do not attack their person or incite harrassment.
  • 3. Post Linux-related content
  • Including Unix and BSD.
  • Non-Linux content is acceptable as long as it makes a reference to Linux. For example, the poorly made mockery of sudo in Windows.
  • No porn. Even if you watch it on a Linux machine.
  • 4. No recent reposts
  • Everybody uses Arch btw, can't quit Vim, and wants to interject for a moment. You can stop now.
  •  

    Please report posts and comments that break these rules!


    Important: never execute code or follow advice that you don't understand or can't verify, especially here. The word of the day is credibility. This is a meme community -- even the most helpful comments might just be shitposts that can damage your system. Be aware, be smart, don't fork-bomb your computer.

    founded 1 year ago
    MODERATORS
     
    you are viewing a single comment's thread
    view the rest of the comments
    [–] [email protected] 30 points 1 year ago* (last edited 1 year ago)

    I used to be a reseller of this highly specialized navigation software. The licensing was handled via hardware fingerprinting of the harddrive. I'm not 100% sure on how it worked, but it grabbed some raw data off of the boot device, and from that generated a fingerprint. This fingerprint was then sent to the guys who made the software, and they would then send us a license key and a hefty bill. The license key only worked with syatems running off of that particular harddrive. If a customer had a harddrive failure, we had to send them the actual harddrive for them to verify, so they would issue a free key to whichever replacement drive was used.

    I did a lot of experimenting with that software. It was linux based and very tweakable, but the licensing part of it was a bit of a mystery. I managed to crack it through some surprisingly simple out-of-the-box thinking, but one limitation I could never figure out how to circumvent was its refusal to generate a fingerprint from virtual drives.

    For starters, it only worked with drives registering as /dev/hdX or /dev/sdX. Anything outside of that and it wouldn't generate a fingerprint.

    This was especially frustrating when a well-paying customer offered a nice bonus if we could install it on a macbook for him. After a few days of tweaking I managed to install and run it, only to discover that fingerprinting the drive couldn't be done due to the device node being/dev/nvmeSomething. And after avfew more days of hacking I managed to fake that too, and they outright refused to issue a license due to them not wanting to support our unofficial hacks.

    Where was I going with this? Oh, right, vmware.. i never managed to get it to run in vmware. We had this other well paying customer who wanted the ability to alt-tab between the software and Windows. Unfortunately, any fingerprinting done from within vmware, regardless how I set up the storage, resulted in a fingerprint file with no data.

    Fun fact: the software ui was written in raw xlib. I got to know the owner and lead dev fairly well, and he hinted that the codebase was a complete mess to the point where something as simple as an input dialog for a config option I recommended was A LOT of work.