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NixOS + TPMs

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19 Jul 2021
@mic92:nixos.devMic92 (Old)Maybe socat?11:50:10
@andi:kack.itandi-Yeah, probably but not very elegant. Would be nicer to teach our test driver to take care of "sidecars"11:50:31
@mic92:nixos.devMic92 (Old)vsocket also need root with qemu I just remeber11:51:07
@mic92:nixos.devMic92 (Old)*remember11:51:12
@mic92:nixos.devMic92 (Old)It would be also nice for virtiofsd to have qemu side cars11:51:38
@andi:kack.itandi-yeah but that also requires root access IIRC11:51:58
@mic92:nixos.devMic92 (Old)Why because virtiofsd needs to change uids?11:53:58
@mic92:nixos.devMic92 (Old)Maybe there could be a uid mapping mode in virtiofsd to map some uid to uid 011:54:14
@mic92:nixos.devMic92 (Old)That would be enough for the nix store.11:54:24
@andi:kack.itandi-Yeah. Like the old 9pfs already worked.11:58:39
@andi:kack.itandi-I haven't dived into the code since it was merged upstream. Back then the docs were all a bit outdated11:59:01
@mic92:nixos.devMic92 (Old)I put this on my long-term TODO list. For the next months I have enought other VM stuff to solve12:02:07
@mic92:nixos.devMic92 (Old)I don't think it would be very complicated12:02:25
@grahamc:nixos.org@grahamc:nixos.orgcool13:14:11
@grahamc:nixos.org@grahamc:nixos.orgI was watching a talk from mjg59 where he mentioned the code quality of tpm2 and tss2 and that it was ... interesting ... inspiring them to make their own pure Go implementation for https://github.com/google/go-attestation13:20:40
@andi:kack.itandi-But their tool only focues on attestation basically leaving us with an even more clustered situation if you want to use the TPM for more than just verified boots?13:29:44
@andi:kack.itandi-Not to sound too negative: I think it is great that that option exists and looks much nicer than the alternatives.13:31:54
@grahamc:nixos.org@grahamc:nixos.orgoh of course13:34:37
@grahamc:nixos.org@grahamc:nixos.orgthat tool is just a tiny piece of the puzzle13:34:44
@grahamc:nixos.org@grahamc:nixos.orgjust mentioning it to note some confirmation of our sniff test's results13:36:25
@andi:kack.itandi-Weren't we looking for https://github.com/fedora-iot/clevis-pin-tpm2 the other day?14:04:21
29 Jul 2021
@ryantm:matrix.orgryantm joined the room.13:39:51
30 Jul 2021
@andi:kack.itandi-https://dolosgroup.io/blog/2021/7/9/from-stolen-laptop-to-inside-the-company-network22:14:52
@andi:kack.itandi-So fTPM over hardware?22:15:11
3 Aug 2021
@florian:web3.foundationFlorian | W3F joined the room.12:25:21
6 Aug 2021
@grahamc:nixos.org@grahamc:nixos.orgis the event log plausibly at another location than /sys/class/tpm/tpm0/device ?13:16:52
@grahamc:nixos.org@grahamc:nixos.org * is the event log plausibly at another location than /sys/kernel/security/tpm0/binary_bios_measurements ?13:17:04
8 Aug 2021
@andi:kack.itandi-https://gitlab.gnome.org/GNOME/libsecret/-/merge_requests/90 <315:13:42
@andi:kack.itandi-^ GSoC project using TPM2 as backend for libsecret passwords. Exactly what I wanted to build...15:14:05
11 Aug 2021
@mic92:nixos.devMic92 (Old)It's weird that dkms does not handle kmod signatures by default: https://gist.github.com/lijikun/22be09ec9b178e745758a29c7a147cc914:16:46

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