[Bug 1980018] Re: Cryptsetup-initramfs cant deal with tpm2-device option

[Stewart Shearer]

@christopher88hall:

I think I may have got it working; I downloaded cryptsetup 2.4.3 from
https://gitlab.com/cryptsetup/cryptsetup, then built and installed it.

It seems to have worked... intramfs built without complaint, and it
booted without asking for a password.

I'm going to nuke this install and try again from a fresh state to
confirm, as I've also been experimenting with other solutions
(https://github.com/anedward01/tpm2KeyUnlock -- I removed the options it
added to crypttab when trying the above test)

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https://bugs.launchpad.net/bugs/1980018

Title:
  Cryptsetup-initramfs cant deal with tpm2-device option

Status in cryptsetup package in Ubuntu:
  Confirmed

Bug description:
  In order to boot an encrypted system and autounlock with tpm2, the
  tpm2-device= option must be specified in  /etc/crypttab. This works
  for non-root filesystems for some reason, but when applied to root
  filesystems it doesnt. Tested working on both arch and fedora, so the
  method is good, something is off in the background.


  root at test:~# update-initramfs -u
  update-initramfs: Generating /boot/initrd.img-5.15.0-40-generic
  cryptsetup: WARNING: sda3_crypt: ignoring unknown option 'tpm2-device'

  
  Manually adding it to  /lib/cryptsetup/functions produces this

  root at test:~# update-initramfs -u
  update-initramfs: Generating /boot/initrd.img-5.15.0-40-generic
  /usr/share/initramfs-tools/hooks/cryptroot: 1: eval: CRYPTTAB_OPTION_tpm2-device=auto: not found

  
  That file belongs to cryptsetup-initramfs

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