#asahi-re on 2024-08-08 — irc logs at oftc.irclog.whitequark.org

2024-07-16 04:52 ChanServ changed the topic of #asahi-re to: Asahi Linux: porting Linux to Apple Silicon macs | Hardware / boot process / firmware interface reverse engineering | WARNING: this channel (only) may contain binary reverse engineering discussion | RE policy: https://alx.sh/re (MANDATORY READ) | GitHub: https://alx.sh/g | Wiki: https://alx.sh/w | Logs: https://alx.sh/l/asahi-re

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08:19 <fenfenS> hi, I'm new here. And I plan to build a project which implement SEP client for signing the kernel, like "kmutil configure-boot" did

08:20 <chaos_princess> you can't, don't try

08:20 <fenfenS> I have some expriences with SEP in pongoOS's SEP driver, and no information about the signing part, since it's enabled on macos only ?

08:20 <chaos_princess> sep will refuse to sign custom kernels unless you are booted into 1TR recovery

08:20 <sven> a sep client for things like full disk encryption and touchid support would be great, but signing the kernel only works from recovery mode

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08:23 <fenfenS> oh, got it. iBoot2 set some register in booting 1TR and SEPOS verified it ?

08:24 <fenfenS> and is there any info about the SEP endpoints?

08:25 <sven> yeah, something like that

08:25 <sven> there's a very basic tracer somewhere in m1n1

08:25 <sven> https://github.com/AsahiLinux/m1n1/blob/main/proxyclient/m1n1/hw/sep.py i think

08:26 <sven> hrm, no, there should be something more

08:26 <chaos_princess> https://github.com/AsahiLinux/docs/wiki/HW:SEP

08:26 <chaos_princess> there is also this

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08:27 <fenfenS> thanks so much, I'll look into it

08:28 <sven> first step is probably to improve the sep tracer to be more useful

08:28 <sven> then prototype the client in python using m1n1

08:28 <sven> and then we can discuss how this entire thing should look like in production

08:31 <fenfenS> is there any aes key for a macOS SEP firmware, or we can only wait for the non-encrypted one someday?

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08:32 <sven> no idea, i'd be surprised if you actually need to look at the SEP firmware though

08:32 <chaos_princess> they _might_ release one with their whole private cloud compute thingy, but do not hold your breath

08:33 <sven> make sure to read https://alx.sh/re "Reverse engineering policy" as well

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10:46 <chadmed> the SEP fw is in plaintext now with apple's PCC images aiui

10:47 <chadmed> so when that releases youll have it

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15:57 <nicolas17> they promised cleartext sepOS in the PCC images but there are no PCC images yet

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