this post was submitted on 21 Jul 2023
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THIS IS NOT (just) ABOUT GOOGLE
Currently, attestation and "trusted computing" are already a thing, the main "sources of trust" are:
This is already going on, you need a Microsoft signed stub to boot anything other than Windows on a PC, you need Apple's blessing to boot anything on a Mac, your smartphone manufacturer decides whether you can unlock it and lose attestation, all of Microsoft, Apple and Google run app attestation through their app stores, several governments and companies run attestation software on their company hardware, and so on.
This is the next logical step, to add "web app" attestation, since the previous ones had barely any pushback, and even fanboys of walled gardens cheering them up.
PS: Somewhat ironically, Google's Play Store attestation is one of the weaker ones, just look at Apple's and the list of stuff they collect from the user's device to "attest" it for any app.
While I agree in general, and the overall sentiment/direction here to steer towards (morally) is clear… let’s stick to facts only.
Bootloader is unlocked and alternative OS exist. Or what else did you mean by that?
Macs with the T2 could be configured to unlock the bootloader, but from my understanding, the new Apple Silicon Macs (M1, M2) come with the bootloader locked.
Your understanding is incorrect, I think.
Apple specifically chose to leave it (or some part of the chain, I don’t actually know, not an expert lol) open, otherwise, a project like Asahi Linux would not have had a chance from the getgo.
I might try to read up on it when I find the time whether they still have to rely on something signed by Apple before being able to take over in the boot process.
I see.
I was going on the fact that the T2 has a "No Security" option for its Secure Boot config, while according to Apple Support the Apple Silicon ones (I don't have one) only offer "Full" or "Reduced" security, which would still require signing: Change security settings on the startup disk of a Mac with Apple silicon
Dunno how the Asahi folks are planning on doing it, but they do indeed say there is no bootlock 🤔
Update: according to the Asahi docs, I seem to understand that Apple Silicon devices allow creating some sort of "OS containers" that can be chosen to boot from separately from the Mac OS one, and in such a custom container the security can be set to "permissive" limited to that container: https://github.com/AsahiLinux/docs/wiki/Open-OS-Ecosystem-on-Apple-Silicon-Macs Interesting.
Yep, that’s a fitting term. You definitely still have to rely on macOS (and keep a copy of it around, e.g. for firmware upgrades, which of course basically only come bundled with macOS versions), but other than that, you can do more or less what you want to – as long as you’re outside of it.
I quite like this idea though if I’m being honest, normie users get all the hardened security from the regular boot chain without experiencing basically any difference/downsides, while hardware enthusiasts and (Linux) tinkerers still have options open (well, options that you can get if you have a new chip on a rarer architecture with previously no third party OS).