3.1 KiB
Prepare YubiKey
Download or mount yubikey-full-disk-encryption and install it in your Arch Linux Live environment. This is needed because we will format the 4rd partition with YubiKey.
Open the yubikey-full-disk-encryption folder and run make.
cd yubikey-full-disk-encryption
make install
Now it's time prepare the second slot of our YubiKey for the challenge response authentication. Touch will be also enabled.
ykpersonalize -v -2 -ochal-resp -ochal-hmac -ohmac-lt64 -ochal-btn-trig -oserial-api-visible
Open /etc/ykfde.conf and set YKFDE_CHALLENGE_SLOT=2 because we want to use the second slot.
Set YKFDE_CHALLENGE_PASSWORD_NEEDED=1 so it asks for the password (2FA). Feel free to modify it tou your needs
e.g. enable TRIM (but be warned, there are potential security implications) support.
Please compare it carefully with the latest version you have downloaded.
# Configuration for yubikey-full-disk-encryption. ("") means an empty value.
### *REQUIRED* ###
# Set to non-empty value to use 'Automatic mode with stored challenge (1FA)'.
#YKFDE_CHALLENGE=""
# Use 'Manual mode with secret challenge (2FA)'.
YKFDE_CHALLENGE_PASSWORD_NEEDED="1"
# Choose YubiKey slot configured for 'HMAC-SHA1 Challenge-Response' mode. Possible values are "1" or "2".
YKFDE_CHALLENGE_SLOT="2"
### OPTIONAL ###
# Set partition UUID. Leave empty to use 'cryptdevice' kernel parameter.
#YKFDE_DISK_UUID=""
# Set LUKS encrypted volume name. Leave empty to use 'cryptdevice' kernel parameter.
#YKFDE_LUKS_NAME=""
# If left empty this will be set as "/dev/disk/by-uuid/$YKFDE_DISK_UUID" -- device to unlock with 'cryptsetup luksOpen'.
#YKFDE_LUKS_DEV=""
# Optional flags passed to 'cryptsetup luksOpen'. Example: "--allow-discards" for TRIM support. Leave empty to use cryptdevice kernel parameter.
#YKFDE_LUKS_OPTIONS=""
# Number of times to assemble passphrase and run 'cryptsetup luksOpen'. Defaults to "5".
#YKFDE_CRYPTSETUP_TRIALS="5"
# Number of seconds to wait for inserting YubiKey, "-1" means 'unlimited'. Defaults to "30".
#YKFDE_CHALLENGE_YUBIKEY_INSERT_TIMEOUT="30"
# Number of seconds passed to 'sleep' after succesful decryption. Defaults to empty, meaning NO sleep.
#YKFDE_SLEEP_AFTER_SUCCESSFUL_CRYPTSETUP=""
# Enable verbose output. It will print all secrets to terminal. Use only for debugging.
#DBG="1"
Next step is to format the 4rd partition. You can modify the arguments if you know what you are doing.
Ensure that you use the 4rd partition e.g. nvme0n1p4
ykfde-format --cipher aes-xts-plain64 --key-size 512 --hash sha256 --iter-time 5000 --type luks2 /dev/[device 4rd partition]
ykfde-open -d /dev/[device 4rd partition] -n cryptlvm
Display the crypt volume with ls /dev/mapper. Next step is to preparing the logical volumes
for / and /home directory.
mount /dev/MyVolGroup/root /mnt
mkdir /mnt/home
mount /dev/MyVolGroup/home /mnt/home