#!/bin/bash

# Copyright 2014-2023 Security Onion Solutions, LLC
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

if [ -f "/usr/sbin/so-common" ]; then
  . /usr/sbin/so-common
fi

ES_AUTH_PILLAR=${ELASTIC_AUTH_PILLAR:-/opt/so/saltstack/local/pillar/elasticsearch/auth.sls}
ES_USERS_FILE=${ELASTIC_USERS_FILE:-/opt/so/saltstack/local/salt/elasticsearch/files/users}

authEnable=$1

if ! grep -q "enabled: " "$ES_AUTH_PILLAR"; then
  echo "Elastic auth pillar file is invalid. Unable to proceed."
  exit 1
fi

function restart() {
  if [[ -z "$ELASTIC_AUTH_SKIP_HIGHSTATE" ]]; then
    echo "Elasticsearch on all affected minions will now be stopped and then restarted..."
    salt -C 'G@role:so-standalone or G@role:so-eval or G@role:so-import or G@role:so-manager or G@role:so-managersearch or G@role:so-node or G@role:so-heavynode' cmd.run so-elastic-stop queue=True
    echo "Applying highstate to all affected minions..."
    salt -C 'G@role:so-standalone or G@role:so-eval or G@role:so-import or G@role:so-manager or G@role:so-managersearch or G@role:so-node or G@role:so-heavynode' state.highstate queue=True
  fi
}

if [[ "$authEnable" == "true" ]]; then
  if grep -q "enabled: False" "$ES_AUTH_PILLAR"; then
    sed -i 's/enabled: False/enabled: True/g' "$ES_AUTH_PILLAR"
    restart
    echo "Elastic auth is now enabled."
    if grep -q "argon" "$ES_USERS_FILE"; then
      echo ""
      echo "IMPORTANT: The following users will need to change their password, after logging into SOC, in order to access Kibana:"
      grep argon "$ES_USERS_FILE" | cut -d ":" -f 1
    fi
  else
    echo "Auth is already enabled."
  fi
elif [[ "$authEnable" == "false" ]]; then
  if grep -q "enabled: True" "$ES_AUTH_PILLAR"; then
    sed -i 's/enabled: True/enabled: False/g' "$ES_AUTH_PILLAR"
    restart
    echo "Elastic auth is now disabled."
  else
    echo "Auth is already disabled."
  fi
else
  echo "Usage: $0 <true|false>"
  echo ""
  echo "Toggles Elastic authentication. Elasticsearch will be restarted on each affected minion."
  echo ""
fi