home-assistant-snap/snap/hooks/prepare-slot-certs

#!/usr/bin/env bash

CERTS_DIR="${SNAP_DATA}/certs"
if ! [[ -d "${CERTS_DIR}" ]]; then
    echo "Creating dir ${CERTS_DIR}"
    mkdir "${CERTS_DIR}"
    chmod 0700 "${CERTS_DIR}"
fi

KEYS_DIR="${SNAP_DATA}/.keys"

if ! [[ "${KEYS_DIR}" ]]; then
    echo "Creating dir ${KEYS_DIR}"
    mkdir "${KEYS_DIR}"
fi

UUID_FILE="${KEYS_DIR}/.install-id"
if ! [[ -f "${UUID_FILE}" ]]; then
    echo "Generating UUID"
    uuid > ${UUID_FILE}
    chmod 0600 "${UUID_FILE}"
fi

UUID=`cat "${UUID_FILE}"`

echo "Generating RSA-keypair"

gpg --list-key "${UUID}" 2> /dev/null

if [[ $? -ne 0 ]]; then
    gpg --batch --gen-key <<< "%no-protection
    Key-Type: DSA
    Key-Length: 2048
    Name-Real: ${UUID}
    Expire-Date: 0"
fi

snapctl set :certs snapname="${SNAP_NAME}"
snapctl set :certs uuid="${UUID}"
snapctl set :certs pkey="`pgp --armor --export ${UUID}`"

echo "${SNAP_NAME}:certs prepared"
exit 1