Verify signature and import authorized_keys file

import_auth_keys.sh

#!/bin/bash

if [ -z "$1" ]; then
        echo "Usage: import_auth_keys /path/to/authorized_keys.asc"
        exit 1
fi

gpg --verify "$1"

read -r -p "Import authorized_keys file? [y/N] " resp
case "$resp" in
        [yY])
                mkdir -p ~/.ssh
                chmod 600 ~/.ssh
                gpg -o ~/.ssh/authorized_keys --decrypt "$1"
                ;;
        *)
                ;;
esac