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NixOS + TPMs

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16 Jul 2021
@grahamc:nixos.org@grahamc:nixos.orgat least with a TPM nobody is expecting regular people to actually interact with it13:53:33
@andi:kack.itandi-Wait until we adjust the NixOS install guid to "now do your usual TPM init dance"13:53:54
@andi:kack.itandi- * Wait until we adjust the NixOS install guide to "now do your usual TPM init dance"13:54:00
@grahamc:nixos.org@grahamc:nixos.orglol13:54:32
@andi:kack.itandi-I actually fear providing any kind of "easy" solution to use TPMs for disk encryption by default... It smells like a huge foot gun.13:54:46
@grahamc:nixos.org@grahamc:nixos.orgI think it has to be easy ...13:54:55
@andi:kack.itandi-Someone trying Linux for a moment and then switching back to windows might be surprised...13:54:56
@grahamc:nixos.org@grahamc:nixos.orgoh13:55:03
@andi:kack.itandi-Of course it has to be easy but nobody expects there to be state that is actually important.13:55:16
@grahamc:nixos.org@grahamc:nixos.orgright13:55:30
@grahamc:nixos.org@grahamc:nixos.orgcomplicated13:55:46
@andi:kack.itandi-I am also almost certain that if it were feasible to do this with every other user on Linux Fedora or such would have tried that.13:55:55
@grahamc:nixos.org@grahamc:nixos.orgit would probably need to be an opinionated thing13:56:29
@grahamc:nixos.org@grahamc:nixos.orglike "this won't work unless you follow our strict path =) my way or the highway "13:57:06
@andi:kack.itandi-Ok, I actually think Fedora has done that stuff. There is that dracut plugin that allows you to do SSS, Password, remote unlock and TPM based unlock etc..13:57:58
@grahamc:nixos.org@grahamc:nixos.orgalthough in what I've set up here I get PCR validation and encrypted disks without using nvram statue13:58:02
@grahamc:nixos.org@grahamc:nixos.org * although in what I've set up here I get PCR validation and encrypted disks without using nvram state13:58:12
@grahamc:nixos.org@grahamc:nixos.orgso it would only get wiped if they switched to windows and windows cleared the tpm13:58:31
@andi:kack.itandi-https://aboutcher.co.uk/2020/06/fedora-linux-luks-encryption-with-tpm-unlock/ this sounds so easy :D14:02:06

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