59 lines
2.9 KiB
Bash
59 lines
2.9 KiB
Bash
# `cryptroot` / LUKS support is no longer included by default in prepare-host.sh.
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# Enable this extension to include the required dependencies for building.
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# This is automatically enabled if CRYPTROOT_ENABLE is set to yes in main-config.sh.
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function add_host_dependencies__add_cryptroot_tooling() {
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display_alert "Adding cryptroot to host dependencies" "cryptsetup LUKS" "debug"
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EXTRA_BUILD_DEPS="${EXTRA_BUILD_DEPS} cryptsetup openssh-client" # @TODO: convert to array later
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display_alert "Adding rootfs encryption related packages" "cryptsetup cryptsetup-initramfs" "info"
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add_packages_to_rootfs cryptsetup cryptsetup-initramfs
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if [[ $CRYPTROOT_SSH_UNLOCK == yes ]]; then
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display_alert "Adding rootfs encryption related packages" "dropbear-initramfs" "info"
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add_packages_to_rootfs dropbear-initramfs
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fi
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}
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function pre_install_kernel_debs__adjust_dropbear_configuration() {
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# Adjust initramfs dropbear configuration
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# Needs to be done before kernel installation, else it won't be in the initrd image
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if [[ $CRYPTROOT_SSH_UNLOCK == yes ]]; then
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declare dropbear_dir="${SDCARD}/etc/dropbear-initramfs"
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declare dropbear_config="config"
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if [[ -d "${SDCARD}/etc/dropbear/initramfs" ]]; then
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dropbear_dir="${SDCARD}/etc/dropbear/initramfs"
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dropbear_config="dropbear.conf"
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fi
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# Set the port of the dropbear ssh daemon in the initramfs to a different one if configured
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# this avoids the typical 'host key changed warning' - `WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED!`
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[[ -f "${dropbear_dir}/${dropbear_config}" ]] &&
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sed -i 's/^#DROPBEAR_OPTIONS=/DROPBEAR_OPTIONS="-j -k -p '"${CRYPTROOT_SSH_UNLOCK_PORT}"' -s -c cryptroot-unlock"/' \
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"${dropbear_dir}/${dropbear_config}"
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# setup dropbear authorized_keys, either provided by userpatches or generated
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if [[ -f $USERPATCHES_PATH/dropbear_authorized_keys ]]; then
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cp "$USERPATCHES_PATH"/dropbear_authorized_keys "${dropbear_dir}"/authorized_keys
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else
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# generate a default ssh key for login on dropbear in initramfs
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# this key should be changed by the user on first login
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display_alert "Generating a new SSH key pair for dropbear (initramfs)" "" ""
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# Generate the SSH keys
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ssh-keygen -t ecdsa -f "${dropbear_dir}"/id_ecdsa \
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-N '' -O force-command=cryptroot-unlock -C 'AUTOGENERATED_BY_ARMBIAN_BUILD' 2>&1
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# /usr/share/initramfs-tools/hooks/dropbear will automatically add 'id_ecdsa.pub' to authorized_keys file
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# during mkinitramfs of update-initramfs
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#cat "${dropbear_dir}"/id_ecdsa.pub > "${SDCARD}"/etc/dropbear-initramfs/authorized_keys
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CRYPTROOT_SSH_UNLOCK_KEY_NAME="${VENDOR}_${REVISION}_${BOARD^}_${RELEASE}_${BRANCH}_${DESKTOP_ENVIRONMENT}".key
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# copy dropbear ssh key to image output dir for convenience
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cp "${dropbear_dir}"/id_ecdsa "${DEST}/images/${CRYPTROOT_SSH_UNLOCK_KEY_NAME}"
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display_alert "SSH private key for dropbear (initramfs) has been copied to:" \
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"$DEST/images/$CRYPTROOT_SSH_UNLOCK_KEY_NAME" "info"
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fi
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fi
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}
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