ExternalVendorCode/balena-supervisor
1
0
Fork 0
mirror of https://github.com/balena-os/balena-supervisor.git synced 2024-12-23 23:42:29 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

Add NXP support to balenaOS secure boot

Browse Source 
On NXP iMX devices the partitions are not encrypted with LUKS but with
the lower level dm-crypt subsystem.

Adapt the partition mount script to use dmsetup which works for both
LUKS and dm-crypt encrypted partitions.

Change-type: patch
Signed-off-by: Alex Gonzalez <alexg@balena.io>
This commit is contained in:
Alex Gonzalez 2024-09-23 12:56:48 +02:00 committed by Felipe Lalanne
parent 43bb9523f0
commit 619f644299
2 changed files with 54 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
Dockerfile.template
View File

@ -96,7 +96,8 @@ RUN apk add --update --no-cache \
dmidecode \
sqlite-libs \
lsblk \
kmod
kmod \
device-mapper
# Iptables should be pinned to 1.8.9 (legacy) as balenaOS still uses iptables-legacy
RUN apk add --update --no-cache \

56
mount-partitions.sh
View File

@ -30,14 +30,58 @@ dbus_get_mount() {
fi
}
# Identify an encrypted partition using dmsetup
# Works for both dm-crypt and LUKS encrypted partitions
# Arguments:
# 1: Partition device - will be converted to a DM device
# Returns:
# 0: The partition device is encrypted
# 1: The partition device is not encrypted
is_part_encrypted() {
_part="${1#/dev/}"
_dm_part="${_part}"
if command -v dmsetup > /dev/null; then
if [ "${_part#dm-}" = "${_part}" ]; then
# Does not start with dm-
if [ "${_part#mapper/}" = "${_part}" ]; then
# Does not start with mapper/
# Find the corresponding DM device to the partition
_dm_part=$(lsblk -nlo kname "/dev/${_dm_part}" | grep dm)
if [ -z "${_dm_part}" ]; then
# No corresponding DM device, no dm-crypt in use
return 1
fi
fi
fi
# _dm_part is a DM device, either dm* or mapper/*
_name=$(lsblk -nlo name "/dev/${_dm_part}")
if dmsetup ls --target crypt | grep -q "${_name}"; then
return 0
fi
fi
return 1
}
# Make sure dm-crypt devices are active in the container
dmsetup_part() {
_label="${1}"
if _dmname=$(dmsetup ls --target crypt | grep "${_label}" | awk '{print $1}'); then
# LUKS DM devices are not named after the partition label
# so no need to check for LUKS explicitely
if [ -n "${_dmname}" ]; then
dmsetup resume "${_dmname}"
fi
fi
}
# Get the current boot block device in case there are duplicate partition labels
# for `(balena|resin)-(boot|state|data)` found.
secure_boot_partitions='efi rpi'
secure_boot_partitions='efi rpi imx'
current_boot_block_device=""
if [ "${TEST}" != 1 ]; then
mnt_boot_mount=$(dbus_get_mount "boot")
mnt_boot_type=$(lsblk -no type "${mnt_boot_mount}")
if [ "${mnt_boot_type}" = "crypt" ]; then
mnt_boot_dev=$(dbus_get_mount "boot")
dmsetup_part "boot"
if is_part_encrypted "${mnt_boot_dev}"; then
echo "INFO: Encrypted boot partition detected."
for part in $secure_boot_partitions; do
echo "INFO: Trying ${part} as boot partition."
@ -50,7 +94,7 @@ if [ "${TEST}" != 1 ]; then
fi
done
else
boot_part="${mnt_boot_mount}"
boot_part="${mnt_boot_dev}"
fi
if [ -z "${boot_part}" ]; then
@ -96,6 +140,8 @@ setup_then_mount() {
partition_label=$1
target_path=$2
dmsetup_part "${partition_label}"
# Try FS label first and partition label as a fallback
for arg in label partlabel; do
kname=$(lsblk "/dev/${current_boot_block_device}" -nlo "kname,${arg}" | grep -E "(resin|balena)-${partition_label}" | awk '{print $1}')