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NixOS + TPMs

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12 Dec 2024
@numinit:matrix.orgMorgan (@numinit)fun fact:04:53:25
@numinit:matrix.orgMorgan (@numinit)PKCS#11 was created by OASIS, the same creators of standards as well designed and respected as.... SAML04:53:57
@numinit:matrix.orgMorgan (@numinit) 😬But at least they somewhat redeemed themselves with virtio. 04:54:25
14 Dec 2024
@netpleb:matrix.orgnetpleb joined the room.23:24:44
@netpleb:matrix.orgnetplebIs it possible for me to supply the seeds for my TPM rather than have the TPM generate them?23:31:15
@netpleb:matrix.orgnetpleb * Is it possible for me to supply the seeds to my TPM rather than have the TPM generate them?23:31:29
@netpleb:matrix.orgnetpleb * Is it possible for me to supply the endorsement and platform seeds to my TPM rather than have the TPM generate them?23:36:25
16 Dec 2024
@netpleb:matrix.orgnetpleb attempting to answer my own question here: as far as I can tell this is probably possible for a virtual/emulated TPM but is likely not straightforward. Still not sure about physical TPMs 20:48:09
22 Dec 2024
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24 Dec 2024
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26 Dec 2024
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1 Jan 2025
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12 Jan 2025
@nakibrayane:matrix.orgRayane Nakib (ريّان نقيب) joined the room.12:37:08
@nakibrayane:matrix.orgRayane Nakib (ريّان نقيب)Hello, I recently got a new laptop with a modern CPU that have a TPM chip, What can I do with it to improve the security of my system?12:45:10
@elikoga:matrix.orgelikoga
In reply to @nakibrayane:matrix.org
Hello, I recently got a new laptop with a modern CPU that have a TPM chip, What can I do with it to improve the security of my system?

https://jnsgr.uk/2024/04/nixos-secure-boot-tpm-fde/

You can use it to unlock your encrypted disk without user intervention

14:59:17
@nakibrayane:matrix.orgRayane Nakib (ريّان نقيب)How is this more secure then dm-crypt with a password, If someone store my laptop, they can just assess all the data in it.16:30:53
@nakibrayane:matrix.orgRayane Nakib (ريّان نقيب)* How is this more secure then dm-crypt with a password? If someone store my laptop, they can just assess all the data in it.16:31:34
@elikoga:matrix.orgelikoga

No? I hope you have your user account protected with a password.

The tpm will not release your encryption keys if system integrity is not given. For example my laptop tpm locks if you open the chassis

16:31:58
@nakibrayane:matrix.orgRayane Nakib (ريّان نقيب)So they can't just put the hard disk in another PC, My hard disk will only unlock in my laptop. And then the security of my data is protected with userspace programs (e.g. GDM, tty login), Is this correct?16:34:29

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