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#!/bin/bash
# $Id: alcasar-ldap.sh 2714 2019-03-10 23:43:22Z tom.houdayer $
# alcasar-ldap.sh
# by Rexy
# This script is distributed under the Gnu General Public License (GPL)
# activation / désactivation de l'authentification des utilisateurs via un serveur LDAP externe
# enable / disable authentication of users via an extern LDAP server
usage="Usage: alcasar-ldap.sh {--on or -on } | {--off or -off} | --import-cert {certificatePath} | --test [-d]"
SED="/bin/sed -i"
CONF_FILE="/usr/local/etc/alcasar.conf"
LDAP_MODULE="/etc/raddb/mods-available/ldap-alcasar"
OPENLDAP_CONF='/etc/openldap/ldap.conf'
LDAPS_CERT_LOC='/etc/raddb/certs/alcasar-ldaps.crt'
LDAP_SERVER=$(grep '^LDAP_SERVER=' $CONF_FILE | cut -d"=" -f2) # hostname/IP address of the LDAP server
LDAP_USER=$(grep '^LDAP_USER=' $CONF_FILE | cut -d"=" -f2-) # LDAP username used by ALCASAR to read the remote directory
LDAP_PASSWORD=$(grep '^LDAP_PASSWORD=' $CONF_FILE | cut -d"=" -f2-) # its password
LDAP_BASE=$(grep '^LDAP_BASE=' $CONF_FILE | cut -d"=" -f2-) # Where to find the users (cn=**,dc=**,dc=**)
LDAP_UID=$(grep '^LDAP_UID=' $CONF_FILE | cut -d"=" -f2) # 'samaccountname' for A.D. - 'UID' for LDAP
LDAP_FILTER=$(grep '^LDAP_FILTER=' $CONF_FILE | cut -d"=" -f2-) # LDAP filter
LDAP_SSL=$(grep '^LDAP_SSL=' $CONF_FILE | cut -d"=" -f2-) # LDAP SSL status
LDAP_CERT_REQUIRED=$(grep '^LDAP_CERT_REQUIRED=' $CONF_FILE | cut -d"=" -f2-) # LDAP SSL certificate verifying
nb_args=$#
args=$1
if [ $nb_args -eq 0 ]; then
nb_args=1
args="-h"
fi
case $args in
-\? | -h* | --h*)
echo "$usage"
exit 0
;;
--on | -on)
$SED "s/^LDAP=.*/LDAP=on/g" $CONF_FILE
if [ "$LDAP_SSL" == 'on' ]; then
$SED "s/^\tserver =.*/\tserver = \"ldaps:\/\/${LDAP_SERVER//\"/\\\\\\\"}\"/g" $LDAP_MODULE
$SED "s/^\tport =.*/\tport = 636/g" $LDAP_MODULE
[ "$LDAP_CERT_REQUIRED" == 'on' ] && require_cert='demand' || require_cert='never'
$SED "s/^\t\t#?require_cert =.*/\t\trequire_cert = '$require_cert'/g" $LDAP_MODULE
echo -e "TLS_CACERT $LDAPS_CERT_LOC\nTLS_REQCERT $require_cert" > $OPENLDAP_CONF
else
$SED "s/^\tserver =.*/\tserver = \"ldap:\/\/${LDAP_SERVER//\"/\\\\\\\"}\"/g" $LDAP_MODULE
$SED "s/^\tport =.*/\tport = 389/g" $LDAP_MODULE
echo '' > $OPENLDAP_CONF
fi
$SED "s/^\tidentity =.*/\tidentity = \"${LDAP_USER//\"/\\\\\\\"}\"/g" $LDAP_MODULE
$SED "s/^\tpassword =.*/\tpassword = \"${LDAP_PASSWORD//\"/\\\\\\\"}\"/g" $LDAP_MODULE
$SED "s/^\tbase_dn =.*/\tbase_dn = \"${LDAP_BASE//\"/\\\\\\\"}\"/g" $LDAP_MODULE
[ -n "$LDAP_FILTER" ] && filter="$LDAP_FILTER" || filter='&'
$SED "s/^\t\tfilter =.*/\t\tfilter = \"(\&(${LDAP_UID//\"/\\\\\\\"}=%{%{Stripped-User-Name}:-%{User-Name}})($filter))\"/g" $LDAP_MODULE
if [ ! -e /etc/raddb/mods-enabled/ldap ]; then
ln -s $LDAP_MODULE /etc/raddb/mods-enabled/ldap
fi
[ -e /etc/raddb/sites-enabled/alcasar ] && rm /etc/raddb/sites-enabled/alcasar
ln -s /etc/raddb/sites-available/alcasar-with-ldap /etc/raddb/sites-enabled/alcasar
/usr/bin/systemctl restart radiusd.service
;;
--off | -off)
$SED "s/^LDAP=.*/LDAP=off/g" $CONF_FILE
rm -f /etc/raddb/mods-enabled/ldap
[ -e /etc/raddb/sites-enabled/alcasar ] && rm /etc/raddb/sites-enabled/alcasar
ln -s /etc/raddb/sites-available/alcasar /etc/raddb/sites-enabled/alcasar
/usr/bin/systemctl restart radiusd.service
;;
--import-cert)
cert=$2
[ -z "$cert" ] && echo "$usage" && exit 1
if [ "$LDAP_CERT_REQUIRED" == 'on' ]; then
domainName=$(openssl x509 -noout -subject -in $LDAPS_CERT_LOC | cut -d' ' -f2- | sed 's@/[A-Za-z]\+=@\n@g' | tac | tr '\n' '.' | sed 's@\.\+$@@')
if [ "$domainName" != "$LDAP_SERVER" ]; then
echo 'WARN: the common name of the certificate is different from the server domain name'
fi
fi
# TODO : convert DER format to PEM ?
cp -f "$cert" $LDAPS_CERT_LOC
chown root:radius $LDAPS_CERT_LOC
chmod 644 $LDAPS_CERT_LOC
$SED "s/^LDAP_SSL=.*/LDAP_SSL=on/g" $CONF_FILE
$SED "s/^\tserver =.*/\tserver = \"ldaps:\/\/${LDAP_SERVER//\"/\\\\\\\"}\"/g" $LDAP_MODULE
$SED "s/^\tport =.*/\tport = 636/g" $LDAP_MODULE
$SED "s@^#\?\t\tca_file =.*@\t\tca_file = $LDAPS_CERT_LOC@g" $LDAP_MODULE
[ "$LDAP_CERT_REQUIRED" == 'on' ] && require_cert='demand' || require_cert='never'
$SED "s/^#\?\t\trequire_cert =.*/\t\trequire_cert = '$require_cert'/g" $LDAP_MODULE
echo -e "TLS_CACERT $LDAPS_CERT_LOC\nTLS_REQCERT $require_cert" > $OPENLDAP_CONF
/usr/bin/systemctl restart radiusd.service
;;
--delete-cert)
[ -f "$LDAPS_CERT_LOC" ] && rm -f $LDAPS_CERT_LOC
;;
--test)
[ -n "$2" ] && [ "$2" == '-d' ] && debugOpt='-d229'
command -v ldapsearch &>/dev/null || { echo >&2 -e "ERR: ldapsearch is not installed\nrun 'dnf install openldap-clients'" ; exit 1; }
if [ "$LDAP_SSL" == 'on' ]; then
protocol='ldaps'
[ "$LDAP_CERT_REQUIRED" == 'on' ] && require_cert='demand' || require_cert='never'
export LDAPTLS_REQCERT="$require_cert"
[ -f "$LDAPS_CERT_LOC" ] && export LDAPTLS_CACERT="$LDAPS_CERT_LOC"
else
protocol='ldap'
fi
[ -n "$LDAP_FILTER" ] && filter="$LDAP_FILTER" || filter='&'
/usr/bin/ldapsearch $debugOpt -LLL -H "$protocol://$LDAP_SERVER" -x -D "$LDAP_USER" -w "$LDAP_PASSWORD" -b "$LDAP_BASE" "(&($LDAP_UID=*)($filter))" 1.1
;;
*)
echo "Argument inconnu : $1";
echo "$usage"
exit 1
;;
esac