cryptsetup2 2.6.1 is a new release that supports reencryption of Q4.2 release LUKS2 volumes created at installation.
This is a critical feature for the Qubes OS 4.2 release for added data at rest protection
Cryptsetup 2.6.x internal changes:
- Argon2 used externally and internally: requires a lot of RAM and CPU to derivate passphrase to key validated in key slots.
- This is used to rate limit efficiently bruteforcing of LUKS key slots, requiring each offline brute force attempt to consume ~15-30 seconds per attempt
- OF course, strong passphrases are still recommended, but bruteforcing LUKSv2 containers with Argon2 would require immense time, ram and CPU even to bruteforce low entropy passphrase/PINs.
- passphrase change doesn't permit LUKS key slot specification anymore: key slot rotates (new one consusumed per op: then old one wiped internally. EG: LUKS key slot 1 created, then 0 deleted)
- reencryption doesn't permit old call arguments. No more direct-io; inadmissively slow through AIO (async) calls, need workarounds for good enough perfs (arguments + newer kernel with cloudfare fixes in tree)
cryptsetup 2.6.1 requires:
- lvm2 2.03.23, which is also included in this PR.
- requires libaio, which is also included in this PR (could be hacked out but deep dependency at first sight: left in)
- requires util-linux 2.39
- patches for reproducible builds are included for above 3 packages.
luks-functions was updated to support the new cryptsetup2 version calls/changes
- reencryption happen in direct-io, offline mode and without locking, requiring linux 5.10.9+ to bypass linux queues
- from tests, this is best for performance and reliability in single-user mode
- LUKS container ops now validate Disk Recovery Key (DRK) passphrase prior and DRK key slot prior of going forward if needed, failing early.
- Heads don't expect DRK to be in static key slot anymore, and finds the DRK key slot dynamically.
- If reencrytipn/passphrase change: make sure all LUKS containers on same block device can be unlocked with same DRK
- Reencryption: requires to know which key slot to reencrypt.
- Find LUKS key slot that unlocks with DRK passphrase unlock prior of reencrypt call
- Passphrase change: no slot can be passed, but key slot of DRK rotates.
kexec-seal-key
- TPM LUKS Disk Unlock Key key slots have changed to be set in max slots per LUKS version (LUKSv1:7 /LUKSv2: 31)
- If key slot != default LUKS version's keyslot outside of DRK key slot: prompt the user before wiping that key slot, otherwise wipe automatically
- This takes for granted that the DRK key slot alone is needed on the system and Heads controls the LUKS key slots.
- If user has something else going on, ie: Using USB Security dongle + TPM DUK, then the user will need to say no when wiping keys.
- It was suggested to leave LUKS key slots outside of DRK alone, but then: what to do when all key slots would be used?
- Alternative implementation could be to only prompt users to wipe keyslots other then DRK when key slots are all used (LUKSv1: 0-7, LUKSv2: 0-31)
- But then cleanup would need to happen prior of operations (LUKS passphrase change, TPM DUK setup) and could be problematic.
- LUKS containers now checked to be same LUKS version prior of permitting to set TPM DUK and will refuse to go forward of different versions.
TODO:
- async (AIO) calls are not used. direct-io is used instead. libaio could be hacked out
- this could be subject to future work
Notes:
- time to deprecated legacy boards the do not enough space for the new space requirements
- x230-legacy, x230-legacy-flash, x230-hotp-legacy
- t430-legacy, t430-legacy-flash, t430-hotp-legacy already deprecated
Unrelated:
- typos fixes found along the way
Signed-off-by: Thierry Laurion <insurgo@riseup.net>
Cloudfare patches to speed up LUKS encryption were upstreamed into linux kernel and backported to 5.10.9: https://github.com/cloudflare/linux/issues/1#issuecomment-763085915
Therefore, we bump to latest of 5.10.x (bump from 5.10.5 which doesn't contain the fixes)
Trace:
sed -i 's/5.10.5/5.10.214/g' boards/*/*.config
find ./boards/*/*.config | awk -F "/" {'print $3'}| while read board; do echo "make BOARD=$board linux"; make BOARD=$board linux; echo make BOARD=$board linux.save_in_oldconfig_format_in_place || make BOARD=$board linux.modify_and_save_oldconfig_in_place; done
git status | grep modified | awk -F ":" {'print $2'}| xargs git add
git commit --signoff
- Move patches from 5.10.5 -> 5.10.214
- Add linux kernel hash and version under modules/linux
- Change board configs accordingly
Signed-off-by: Thierry Laurion <insurgo@riseup.net>
Instead of requesting additional ramstage heap, cherry-pick patches for
newer JPEG decoder that does not require heap allocation.
Signed-off-by: Jonathon Hall <jonathon.hall@puri.sm>
Signed-off-by: Thierry Laurion <insurgo@riseup.net>
Update Makefile helper to be able to do it with these steps
docker run -e DISPLAY=$DISPLAY --network host --rm -ti -v $(pwd):$(pwd) -w $(pwd) tlaurion/heads-dev-env:latest -- make BOARD=UNTESTED_t440p-hotp-maximized board.move_untested_to_tested
docker run -e DISPLAY=$DISPLAY --network host --rm -ti -v $(pwd):$(pwd) -w $(pwd) tlaurion/heads-dev-env:latest -- make BOARD=UNTESTED_t440p-maximized board.move_untested_to_tested
git status
git add boards/t440p-hotp-maximized/t440p-hotp-maximized.config boards/t440p-maximized/t440p-maximized.config .circleci/config.yml boards/UNTESTED_t440p-hotp-maximized/UNTESTED_t440p-hotp-maximized.config boards/UNTESTED_t440p-maximized/UNTESTED_t440p-maximized.config
Signed-off-by: Thierry Laurion <insurgo@riseup.net>
This is not a blocker, but it used to be possible to flash BMC chip from Heads. PAtch is missing to flashprog
Signed-off-by: Thierry Laurion <insurgo@riseup.net>
- CircleCI: add build based on coreboot 24.02.01 release (might be old but unclear to my eyes now)
- Add board non-HOTP board config as a start, reuse x230 linux config
- Add coreboot config modified ans saved theourh coreboot Makefile file helper
Next steps
- Create blobs extraction scripts automating https://docs.dasharo.com/variants/dell_optiplex/initial-deployment/#firmware-preparation
Signed-off-by: Thierry Laurion <insurgo@riseup.net>
