classes/phosphor-deploy-ssh-keys.bbclass

####
# Copyright 2020 Hewlett Packard Enterprise Development LP.
#
#
# Add a basic class to add a privileged user from an ssh
# standpoint and a public key passed as an input parameter
# from the local.conf file
# Example:
# INHERIT += "phosphor-deploy-ssh-keys"
# SSH_KEYS = "vejmarie:/home/openbmc/openbmc/meta-hpe/keys/test.pub;"
####

inherit useradd_base

IMAGE_PREPROCESS_COMMAND += "deploy_local_user;"

deploy_local_user () {
        if [ "${SSH_KEYS}" != "" ]; then
		group_settings="${SSH_KEYS}"
		current_setting=`echo $group_settings | cut -d ';' -f1`
		remaining=`echo $group_settings | cut -d ';' -f2-`
		while test "x$current_setting" != "x"; do

			username=`echo ${SSH_KEYS} | awk -F":" '{ print $1}'`
			key_path=`echo ${SSH_KEYS} | awk -F":" '{ print $2}'`

			if [ ! -d ${IMAGE_ROOTFS}/home/${username} ]; then
				perform_useradd "${IMAGE_ROOTFS}" "-R ${IMAGE_ROOTFS} -p '' ${username}"
			fi

			if [ ! -d ${IMAGE_ROOTFS}/home/${username}.ssh/ ]; then
				install -d ${IMAGE_ROOTFS}/home/${username}/.ssh/
			fi

			if [ ! -f ${IMAGE_ROOTFS}/home/${username}/.ssh/authorized_keys ]; then
				install -m 0600 ${key_path} ${IMAGE_ROOTFS}/home/${username}/.ssh/authorized_keys
			else
				cat ${key_path} >> ${IMAGE_ROOTFS}/home/${username}/.ssh/authorized_keys
			fi

			uid=`cat ${IMAGE_ROOTFS}/etc/passwd | grep "${username}:" | awk -F ":" '{print $3}'`
			guid=`cat ${IMAGE_ROOTFS}/etc/passwd | grep "${username}:" | awk -F ":" '{print $4}'`

			chown -R ${uid}:${guid} ${IMAGE_ROOTFS}/home/${username}/.ssh
			chmod 600  ${IMAGE_ROOTFS}/home/${username}/.ssh/authorized_keys
			chmod 700 ${IMAGE_ROOTFS}/home/${username}/.ssh

			is_group=`grep "priv-admin" ${IMAGE_ROOTFS}/etc/group || true`

			if [ -z "${is_group}" ]; then
				perform_groupadd "${IMAGE_ROOTFS}" "-R ${IMAGE_ROOTFS} priv-admin"
			fi

			perform_usermod "${IMAGE_ROOTFS}" "-R ${IMAGE_ROOTFS} -a -G priv-admin ${username}"

			current_setting=`echo $remaining | cut -d ";" -f1`
			remaining=`echo $remaining | cut -d ';' -f2-`
		done
	else
		bbwarn "Trying to deploy SSH keys but input variable is empty (SSH_KEYS)"
	fi
}