#!/bin/sh
########################################################################
# 
#   Copyright (C) 2006 Novell, Inc. All Rights Reserved.
# 
#   This library is free software; you can redistribute it and/or
#   modify it under the terms of the GNU Lesser General Public
#   License as published by the Free Software Foundation; version 2.1
#   of the License.
# 
#   This library 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
#   Library Lesser General Public License for more details.
# 
#   You should have received a copy of the GNU Lesser General Public
#   License along with this library; if not, Novell, Inc.
#  
#   To contact Novell about this file by physical or electronic mail, 
#   you may find current contact information at www.novell.com.
#  
#   Author: Juan Carlos Luciani <jluciani@novell.com>
#   
########################################################################

########################################################################
#
# Scrip for setting up iaRealm.xml and auth.policy files for ATS
# using a single LDAP Realm.
# 
# Notice that this scrip is very basic and only supports a single LDAP
# server.
#
########################################################################

DEFAULT_TEMPLATE_FILE_FOLDER=/etc/CASA/authtoken/svc/templates
DEFAULT_CONFIG_FILE_FOLDER=/etc/CASA/authtoken/svc

function display_usage
{
   echo "usage: CasaBasicATSSetup.sh [-h] [TemplateFileFolder] [ConfigFileFolder]"
   echo "  where the position dependent parameters are:"
   echo "    -h - Display this information"
   echo "    TemplateFileFolder - Path to the folder containing the template files. If"
   echo "                         not specified, the parameter defaults to"
   echo "                         $DEFAULT_TEMPLATE_FILE_FOLDER."
   echo "    ConfigFileFolder - Path to the output file folder. If not specified, the"
   echo "                       parameter defaults to $DEFAULT_CONFIG_FILE_FOLDER."
   echo ""
   echo "  The following environment variables MUST be exported when"
   echo "  executing this script:"
   echo "    REALM - The name of the LDAP Realm, example: Tree name"
   echo "    LDAP_HOST_NAME - The host name of the LDAP server"
   echo "    PROXY_USER_NAME - The name of the LDAP Proxy User"
   echo "    PROXY_USER_PW - The password of the LDAP Proxy User"
   echo ""
   echo "  The following environment variables MAY be exported when"
   echo "  executing this script:"
   echo "    LDAP_LISTEN_PORT - The port used by the LDAP server to listen for connections"
   echo ""
   echo "  WARNING: CURRENTLY THERE IS A LIMITATION THAT PREVENTS YOU FROM"
   echo "           USING ENVIRONMENT VARIABLES WITH THE CHARACTER ':'."
   echo ""
}


function setup_jaas_file
{
   # Determine the file names 
   TEMPLATE_FILE=$TEMPLATE_FILE_FOLDER/jaas.conf
   CONFIG_FILE=$CONFIG_FILE_FOLDER/jaas.conf

   # Verify that the template file exists
   if [ ! -f $TEMPLATE_FILE ]; then
      echo "Template file $TEMPLATE_FILE does not exist"
      return 2
   fi

   # Verify that the output folder exists
   if [ ! -d $CONFIG_FILE_FOLDER ]; then
      echo "Output folder $CONFIG_FILE_FOLDER does not exist"
      return 2
   fi

   # Clean-up the output folder
   rm -f $CONFIG_FILE

   # Create and edit the output file
   host=`hostname -f`
   sed s:HOSTNAME:$host:g $TEMPLATE_FILE > $CONFIG_FILE
   return 0
}


function setup_iaRealms_file
{
   # Determine the file names 
   TEMPLATE_FILE=$TEMPLATE_FILE_FOLDER/iaRealms.xml
   CONFIG_FILE=$CONFIG_FILE_FOLDER/iaRealms.xml

   # Verify that the template file exists
   if [ ! -f $TEMPLATE_FILE ]; then
      echo "Template file $TEMPLATE_FILE does not exist"
      return 2
   fi

   # Verify that the output folder exists
   if [ ! -d $CONFIG_FILE_FOLDER ]; then
      echo "Output folder $CONFIG_FILE_FOLDER does not exist"
      return 2
   fi

   # Clean-up the output folder
   rm -f $CONFIG_FILE

   # Verify that all of the appropriate environment variables have been set
   if [ "$REALM" != "" ]; then
      if [ "$LDAP_HOST_NAME" != "" ]; then
         if [ "$PROXY_USER_NAME" != "" ]; then
            if [ "$PROXY_USER_PW" != "" ]; then
               # Create and edit the output file
               sed s:REALM:$REALM:g $TEMPLATE_FILE > $CONFIG_FILE
               sed -i s:LDAP_HOST_NAME:$LDAP_HOST_NAME:g $CONFIG_FILE
               sed -i s:PROXY_USER_NAME:$PROXY_USER_NAME:g $CONFIG_FILE
               sed -i s:PROXY_USER_PW:$PROXY_USER_PW:g $CONFIG_FILE
               if [ "$LDAP_LISTEN_PORT" != '' ]; then
                  sed -i s:LDAP_LISTEN_PORT:$LDAP_LISTEN_PORT:g $CONFIG_FILE
               else
                  sed -i s:LDAP_LISTEN_PORT:636:g $CONFIG_FILE
               fi
               return 0
            else
               return 1
            fi
         else
            return 1
         fi
      else
         return 1
      fi
   else
      return 1
   fi
}


function setup_authPolicy_file
{
   EDITOR=/usr/share/java/CASA/authtoken/bin/CasaAuthPolicyEditor.sh

   # Determine the file name
   CONFIG_FILE=$CONFIG_FILE_FOLDER/auth.policy

   # Verify that the output folder exists
   if [ ! -d $CONFIG_FILE_FOLDER ]; then
      echo "Output folder $CONFIG_FILE_FOLDER does not exist"
      return 2
   fi

   # Clean-up the output folder
   rm -f $CONFIG_FILE

   # Verify that all of the appropriate environment variables have been set
   if [ "$REALM" != "" ]; then
      # Create and setup the auth.policy file
      $EDITOR -create -file $CONFIG_FILE
      $EDITOR -append -entry $REALM:Krb5Authenticate -file $CONFIG_FILE
      $EDITOR -append -entry $REALM:PwdAuthenticate -file $CONFIG_FILE
      return 0
   else
      return 1
   fi
}


function setup_svcSettings_file
{
   EDITOR=/usr/share/java/CASA/authtoken/bin/CasaSvcSettingsEditor.sh

   # Determine the file name
   CONFIG_FILE=$CONFIG_FILE_FOLDER/svc.settings
   IAREALMS_FILE_PATH=$CONFIG_FILE_FOLDER/iaRealms.xml

   # Verify that the output folder exists
   if [ ! -d $CONFIG_FILE_FOLDER ]; then
      echo "Output folder $CONFIG_FILE_FOLDER does not exist"
      return 2
   fi

   # Clean-up the output folder
   rm -f $CONFIG_FILE

   # Create and setup the svc.settings file
   $EDITOR -create -file $CONFIG_FILE
   $EDITOR -set IAConfigFile $IAREALMS_FILE_PATH -file $CONFIG_FILE
   return 0
}


#### MAIN ####

# Determine what folders to utilize based on the input
# parameters and our defaults.
if [ "$1" != "" ]; then
   if [ "$1" != "-h" ]; then
      TEMPLATE_FILE_FOLDER=$1
   else
      display_usage
      exit 0
   fi
else
   TEMPLATE_FILE_FOLDER=$DEFAULT_TEMPLATE_FILE_FOLDER
fi

if [ "$2" != "" ]; then
   CONFIG_FILE_FOLDER=$2
else
   CONFIG_FILE_FOLDER=$DEFAULT_CONFIG_FILE_FOLDER
fi

# Source our environment variables file
. /etc/CASA/authtoken/svc/envvars

# Setup the configuration files
setup_jaas_file
setup_iaRealms_file
RETVAL=$?
if [ "$RETVAL" = "0" ]; then
   setup_authPolicy_file
   RETVAL=$?
   if [ "$RETVAL" = "0" ]; then
      setup_svcSettings_file
      RETVAL=$?
   fi
fi

if [ "$RETVAL" != "0" ]; then
   if [ "$RETVAL" = "1" ]; then
      display_usage
   fi
   exit 1
else
   exit 0
fi