Adding upstream version 255.4.upstream/255.4

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 41 insertions, 0 deletions

diff --git a/man/yubikey-crypttab.sh b/man/yubikey-crypttab.sh
new file mode 100644
index 0000000..a66a88f
--- /dev/null
+++ b/man/yubikey-crypttab.sh
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+# SPDX-License-Identifier: MIT-0
+
+# Destroy any old key on the Yubikey (careful!)
+ykman piv reset
+
+# Generate a new private/public key pair on the device, store the public key in
+# 'pubkey.pem'.
+ykman piv generate-key -a RSA2048 9d pubkey.pem
+
+# Create a self-signed certificate from this public key, and store it on the
+# device. The "subject" should be an arbitrary user-chosen string to identify
+# the token with.
+ykman piv generate-certificate --subject "Knobelei" 9d pubkey.pem
+
+# We don't need the public key anymore, let's remove it. Since it is not
+# security sensitive we just do a regular "rm" here.
+rm pubkey.pem
+
+# Enroll the freshly initialized security token in the LUKS2 volume. Replace
+# /dev/sdXn by the partition to use (e.g. /dev/sda1).
+sudo systemd-cryptenroll --pkcs11-token-uri=auto /dev/sdXn
+
+# Test: Let's run systemd-cryptsetup to test if this all worked.
+sudo systemd-cryptsetup attach mytest /dev/sdXn - pkcs11-uri=auto
+
+# If that worked, let's now add the same line persistently to /etc/crypttab,
+# for the future. We don't want to use the (unstable) /dev/sdX name, so let's
+# figure out a stable link:
+udevadm info -q -r symlink /dev/sdXn
+
+# Now add the line using the by-uuid symlink to /etc/crypttab:
+sudo bash -c 'echo "mytest /dev/disk/by-uuid/... - pkcs11-uri=auto" >>/etc/crypttab'
+
+# Depending on your distribution and encryption setup, you may need to manually
+# regenerate your initramfs to be able to use a Yubikey / PKCS#11 token to
+# unlock the partition during early boot.
+# More information at https://unix.stackexchange.com/a/705809.
+# On Fedora based systems:
+sudo dracut --force
+# On Debian based systems:
+sudo update-initramfs -u