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#!/bin/bash
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# alcasar-ldap.sh
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# by Rexy
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# This script is distributed under the Gnu General Public License (GPL)
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# activation / d├ęsactivation de l'authentification des utilisateurs via un serveur LDAP externe
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# enable / disable authentication of users via an extern LDAP server
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usage="Usage: alcasar-ldap.sh {--on or -on } | {--off or -off}"
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SED="/bin/sed -i"
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CONF_FILE="/usr/local/etc/alcasar.conf"
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LDAP_MODULE="/etc/raddb/mods-available/ldap-alcasar"
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LDAP_SERVER=`grep ^LDAP_SERVER= $CONF_FILE|cut -d"=" -f2`               # IP address of the LDAP server
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LDAP_BASE=`grep ^LDAP_BASE= $CONF_FILE|cut -d"=" -f2-`                  # Where to find the users (cn=**,dc=**,dc=**)
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LDAP_UID=`grep ^LDAP_UID= $CONF_FILE|cut -d"=" -f2`                             # 'samaccuntname' for A.D. - 'UID' for LDAP
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LDAP_FILTER=`grep ^LDAP_FILTER= $CONF_FILE|cut -d"=" -f2-`              # Filter to limit users search (not used for now)
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LDAP_USER=`grep ^LDAP_USER= $CONF_FILE|cut -d"=" -f2-`                  # LDAP username used by ALCASAR to read the remote directory
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LDAP_PASSWORD=`grep ^LDAP_PASSWORD= $CONF_FILE|cut -d"=" -f2-`  # its password
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nb_args=$#
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args=$1
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if [ $nb_args -eq 0 ]
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then
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        nb_args=1
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        args="-h"
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fi
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case $args in
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        -\? | -h* | --h*)
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                echo "$usage"
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                exit 0
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                ;;
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        --on | -on)    
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                $SED "s/^LDAP=.*/LDAP=on/g" $CONF_FILE
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                $SED "s/^server =.*/server = ldap:\/\/$LDAP_SERVER/g" $LDAP_MODULE
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                $SED "s/^identity =.*/identity = $LDAP_USER/g" $LDAP_MODULE
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                $SED "s/^password =.*/password = $LDAP_PASSWORD/g" $LDAP_MODULE
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                $SED "s/^base_dn =.*/base_dn = \"$LDAP_BASE\"/g" $LDAP_MODULE
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                $SED "s/^filter =.*/filter = \"($LDAP_UID=%{%{Stripped-User-Name}:-%{User-Name}})\"/g" $LDAP_MODULE
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                if [ ! -e /etc/raddb/mods-enabled/ldap ]
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                then
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                        ln -s $LDAP_MODULE /etc/raddb/mods-enabled/ldap
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                fi
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                if [ -e /etc/raddb/sites-enabled/alcasar ]
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                then
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                        rm /etc/raddb/sites-enabled/alcasar
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                fi
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                ln -s /etc/raddb/sites-available/alcasar-with-ldap /etc/raddb/sites-enabled/alcasar
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                /usr/bin/systemctl restart radiusd.service
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                ;;
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        --off | -off)
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                $SED "s/^LDAP=.*/LDAP=off/g" $CONF_FILE
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                rm -f /etc/raddb/mods-enabled/ldap
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                if [ -e /etc/raddb/sites-enabled/alcasar ]
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                then
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                        rm /etc/raddb/sites-enabled/alcasar
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                fi
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                ln -s /etc/raddb/sites-available/alcasar /etc/raddb/sites-enabled/alcasar
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                /usr/bin/systemctl restart radiusd.service
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                ;;
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        *)
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                echo "Argument inconnu : $1";
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                echo "$usage"
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                exit 1
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                ;;
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esac