#!/bin/sh

# Copyright (c) 2016 Peter Palfrader <peter@palfrader.org>
#
# Permission is hereby granted, free of charge, to any person obtaining
# a copy of this software and associated documentation files (the
# "Software"), to deal in the Software without restriction, including
# without limitation the rights to use, copy, modify, merge, publish,
# distribute, sublicense, and/or sell copies of the Software, and to
# permit persons to whom the Software is furnished to do so, subject to
# the following conditions:
#
# The above copyright notice and this permission notice shall be
# included in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

# renew all certs in ~/certs that match *-letsencrypt.pem
#      SHELL=/bin/bash
#      @daily sleep $(( $RANDOM \% 7200 )) && export PATH="$HOME/bin:$PATH" && renew-as-required
# probably want to run this under chronic, so add a chronic:
#      SHELL=/bin/bash
#      @daily sleep $(( $RANDOM \% 7200 )) && export PATH="$HOME/bin:$PATH" && chronic renew-as-required
# (chronic is in moreutils)

set -e
set -u

cd ~/certs
expire_time=$(( 3600 * 24 * 7 * 3 ))
err=0

for i in *-letsencrypt.pem; do
  echo "=== $i ==="
  if openssl x509 -checkend "$expire_time" -noout < "$i"; then
    echo "$i is current."
  else
    cn="${i%-letsencrypt.pem}"
    if [ "$cn" = "$i" ]; then
      echo >&2 "Cannot figure out hostname for $i."
      err=1
      continue
    fi
    echo "Need to renew $cn"
    if ! request-letsencrypt "$cn"; then
      echo >&2 "Letsencrypt request for $cn failed."
      err=1
      continue
    fi
    if ! make-combined-crt "$cn"; then
      echo >&2 "make-combined-crt for $cn failed."
      err=1
      continue
    fi
  fi
  echo
done

# cron daily will run logrotate which will reload apache anyway
exit $err