#!/bin/sh
set -e

export PATH="/usr/bin:/bin:/usr/sbin:/sbin"
export GIT_SSH="/usr/sbin/foodoor-ssh-wrapper"

dest=/var/run/foodoor-keys

if [ ! -e "${dest}/.git/config" ]
then
    #echo "Repo does not exist, trying to clone..."
    ( cd /var/run && git clone --quiet --single-branch --depth=1 luftschleuse@nordstern.chaospott.de:/home/luftschleuse/foodoor-keys "${dest}" )
else
    #echo "Repo exists, updating..."
    ( cd "${dest}" && git fetch --quiet && git merge --quiet origin/master master )
fi

for action in open close
do
    outfile="${dest}/authorized_keys.${action}"
    rm -f ${outfile}
    find "${dest}/keys" -name '*.pub' | sort | \
        while read keyfile
        do
            valid_key=$(ssh-keygen -l -f ${keyfile})
            if [ "$?" -eq "0" ]; then
                if [ $(echo "${valid_key}" | cut -d" " -f1) -ne "4096" ]; then
                    echo "Key size of key ${keyfile} not equal to 4096. Not adding it to key database." >&2
                    continue
                fi
            fi
            printf "command=\"/usr/sbin/foodoor ${action}\",no-port-forwarding,no-X11-forwarding,no-agent-forwarding " >> ${outfile}
            cat "${keyfile}" >> ${outfile}
        done
    install -d -o ${action} -g nogroup -m 0700 /var/lib/foodoor/${action}/.ssh
    install -b -S .last -o ${action} -g nogroup -m 0600 ${outfile} /var/lib/foodoor/${action}/.ssh/authorized_keys
done