#!/bin/sh
#
#     tiger - A UN*X security checking system
#     Copyright (C) 2003 Javier Fernandez-Sanguino
#
#    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 2, 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.
#
#     Please see the file `COPYING' for the complete copyright notice.
#
# check_umask - 04/15/2003
#
# Check for umask setting in configuration files. This check has been 
# separated from check_logfiles since it's a broader check. The command
# requirements have been modified to adjust to what it's really needed.
#
# 01/13/2004 - jfs - Fixed syntax error in the previous patch
# 10/19/2003 - jfs - Applied patch from Ryan Bradetich adding 077 umask
#              to the valid list.
# 08/09/2003 - jfs - Fixed the script so it does not grok if no valid
#              umask entries are available
# 05/01/2003 - jfs - Fixed dependancies
#
#-----------------------------------------------------------------------------
# TODO
# The script will not work properly if the 'umask' string is present 
# in the script but it's not a valid call to the umask setting. 
# It will not work properly either if more than 3 occurances of umask are 
# present.
#
#-----------------------------------------------------------------------------
#
TigerInstallDir="/usr/share/tiger"

#
# Set default base directory.
# Order or preference:
#      -B option
#      TIGERHOMEDIR environment variable
#      TigerInstallDir installed location
#
basedir=${TIGERHOMEDIR:=$TigerInstallDir}

for parm
do
   case $parm in
   -B) basedir=$2; break;;
   esac
done

#
# Verify that a config file exists there, and if it does
# source it.
#
[ ! -r $basedir/config ] && {
  echo "--ERROR-- [init002e] No 'config' file in \`$basedir'."
  exit 1
}

. $basedir/config

. $BASEDIR/initdefs

#
# If run in test mode (-t) this will verify that all required
# elements are set.
#
[ "$Tiger_TESTMODE" = 'Y' ] && {
  haveallcmds TAIL SED HEAD EXPAND GREP WC CUT  || exit 1
  haveallfiles BASEDIR WORKDIR || exit 1
  haveallvars TESTLINK HOSTNAME
  
  echo "--CONFIG-- [init003c] $0: Configuration ok..."
  exit 0
}

#------------------------------------------------------------------------

haveallcmds TAIL SED HEAD EXPAND GREP WC CUT  || exit 1
haveallfiles BASEDIR WORKDIR || exit 1

#####
# Check to ensure that the umask is set correctly
#####

echo
echo "# Checking for correct umask settings..."

for file in '/etc/profile' '/etc/csh.login' '/etc/bashrc'
do
   [ -r $file ] && {

   Occurance=`$GREP umask $file | $WC -l`

   if [ $Occurance = 0 ]; then
	#echo "No umask entry"
	message WARN misc021w "" "There are no umask entries in $file"

   elif [ $Occurance = 1 ]; then
	UMASK1=`$GREP umask $file  \
           | $EXPAND \
           | $SED -e "s/^.*umask//"\
           | $CUT -d" " -f2`

        if [ "$UMASK1" != "" ] ; then
	[ $UMASK1 != 002 -a $UMASK1 != 022 -a $UMASK1 != 027 -a $UMASK1 != 077 ] && 
		#echo "The umask setting in $file is insecure"
		message FAIL misc022f '' "The umask setting in $file is insecure"
	else 
	message WARN misc021w "" "There are no valid umask entries in $file"
	fi


    elif [ $Occurance = 2 ]; then
	UMASK1=`$GREP umask $file  \
             | $EXPAND \
             | $HEAD -n 1 \
             | $SED -e "s/^.*umask//" \
             | $CUT -d" "  -f2`
    	UMASK2=`$GREP umask $file  \
             | $EXPAND \
             | $TAIL -n 1 \
             | $SED -e "s/^.*umask//" \
             | $CUT -d" " -f2`

        [ "$UMASK1" != "" -a "$UMASK2" != "" ] && \
 	[ $UMASK1 != 002 -a $UMASK1 != 022  -a $UMASK1 != 027 -a $UMASK1 != 077 -o $UMASK2 != 002 -a $UMASK2 != 022  -a $UMASK2 != 027 -a $UMASK2 != 077 ] &&
		#echo "The umask setting in $file is insecure"
                message FAIL misc022f '' "The umask setting in $file is insecure"
	else
		#echo "There are > 2 umask entries in the config file $file"
		message WARN misc023w '' "More than 2 umask entries in $file"
	
fi

}

done
