#!/bin/sh

# Minimum version of TSK that is required
minver="2.00";

# The last released version of TSK
curtskver="2.06";

# Configuration script for the Autopsy Forensic Browser
#
# Brian Carrier [carrier@sleuthkit.org]
#
# Copyright (c) 2003-2006 by Brian Carrier.  All rights reserved
#
# Copyright (c) 2001-2003 by Brian Carrier, @stake.  All rights reserved
#
# Copyright (c) 2001 by Brian Carrier.  All rights reserved
#
# This file is part of the Autopsy Forensic Browser (Autopsy)
#
# Autopsy 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 of the License, or
# (at your option) any later version.
# 
# Autopsy 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 Autopsy; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA  
##
# THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
# WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
# MERCHANTABILITY AND FITNESS FOR ANY PARTICULAR PURPOSE.
# IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
# INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
# (INCLUDING, BUT NOT LIMITED TO, LOSS OF USE, DATA, OR PROFITS OR
# BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
# WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
# OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
# ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.


# Directories to search in
dirs='/usr/local/bin/ /usr/bin/ /usr/ccs/bin/ /bin/ /usr/ucb/bin/ /sbin/ /usr/sbin/ /usr/local/sbin/'


echo ""
echo "   Autopsy Forensic Browser Installation"
echo ""

#############################################################################
# Setup Perl locations
#############################################################################

# Find perl - we require 5.8.0 or later
found=0;

for d in $dirs
  do if (test -x ${d}perl) then
    if (test -n "`${d}perl -v 2> /dev/null | awk '/This is perl/ {print $0}'`") then
      ver=`${d}perl -v 2> /dev/null | awk '/This is perl,/ {print $4}'`;
      if (test "$ver" '<' "v5.8.0") then 
        echo "old version of perl found: ${d}perl (version $ver) -- continuing";
      else	  
        echo "perl found: ${d}perl (version $ver)";
        echo "#!${d}perl -wT" > ./config.tmp;
        echo "#!${d}perl" > ./config2.tmp;
        found=1; 
        break; 
      fi;
    fi;
  fi;
done

# If it wasn't found, then prompt for it.
if (test $found -eq 0) then
  echo 'ERROR: perl not found or the incorrect version found';
  while (test 1 -eq 1) 
    do echo 'Enter location of perl executable:';
    read perlexe;
    if (test -x "$perlexe") then
      if (test -n "`$perlexe -v 2> /dev/null | awk '/This is perl/ {print $0}'`")       then
        ver=`$perlexe -v 2> /dev/null | awk '/This is perl,/ {print $4}'`;
        if (test "$ver" '<' "v5.8.0") then 
          echo "This version of Perl is too old, 5.8.0 or older needed";
        else	  
          echo "Correct version found";
          echo "#!${d}perl -wT" > ./config.tmp;
          echo "#!${d}perl" > ./config2.tmp;
          found=1; 
          break; 
        fi;
      else
        echo "Perl found, but is not working.  Try another";
      fi;
    else
      echo "file not found";
    fi
  done
fi

# Check if this version of Perl supports large files
if (test -z "`${d}perl -V 2> /dev/null | awk '/USE_LARGE_FILES/ {print $0}'`") then
  echo ''
  echo '    NOTE: It appears that your Perl does not support large files.';
  echo '    You therefore will not be able to analyze images larger than 2GB.';
  echo '    Download the source version from www.cpan.org and compile a new version.';
  echo "  [Press Enter to Continue]";
  read foo;
  echo ''
fi;

# Get current working directory for lib
echo "use lib '$PWD/';" >> ./config.tmp
echo "use lib '$PWD/lib/';" >> ./config.tmp

# Write autopsy
if (test -f ./autopsy) then
  echo "autopsy already exists, overwrite? (y/n):";
  read rep;
  if (test "$rep" = "y") then
    cat ./config.tmp base/autopsy.base > ./autopsy
    cat ./config2.tmp base/make-live-cd.base > ./make-live-cd
  else 
    echo '  original version was kept';
  fi
else
  cat ./config.tmp base/autopsy.base > ./autopsy
  cat ./config2.tmp base/make-live-cd.base > ./make-live-cd
fi
chmod 0755 ./autopsy
chmod 0755 ./make-live-cd

# cleanup
rm -f ./config.tmp
rm -f ./config2.tmp


#############################################################################
# create conf.pl
#############################################################################


conf='conf.pl'

if (test -f $conf) then
  echo "A configuration file already exists, overwrite? (y/n):";
  read rep;
  if (test "$rep" = "n") then
    exit 0;
  fi
fi

# echo ''
# echo '---------------------------------------------------------------'
# echo ''
# echo 'Autopsy can use the configuration file from a previous installation'
# echo ''
# echo 'Would you like to use a previous configuration file (y/n) [n]'
# read rep;
# if (test "$rep" = "y") then

#  echo 'Enter the directory of the previous installation (or cancel):'
#  while (test 1 -eq 1) 
#    do read prevdir;
#    if (test "$prevdir" = "cancel") then
#		break;
#	fi;
#    if (test -f "${prevdir}/conf.pl") then
#		/bin/cp "${prevdir}/conf.pl" .
#		echo '  Configuration file copied from $prevdir';

#		# Check the config status
#		exit 0;
#	fi;
#    echo 'Configuration file not found, try again (or 'cancel' to stop):'
#  done;
#fi;


# First add the variables that are static
#
# DEFAULT USER SETTINGS
#
echo '# Autopsy configuration settings' > $conf
echo '' >> $conf
echo '# when set to 1, the server will stop after it receives no' >> $conf
echo '# connections for STIMEOUT seconds. ' >> $conf
echo '$USE_STIMEOUT = 0;' >> $conf
echo '$STIMEOUT = 3600;'>> $conf    

echo '' >> $conf
echo '# number of seconds that child waits for input from client' >> $conf
echo '$CTIMEOUT = 15;' >> $conf

echo '' >> $conf
echo '# set to 1 to save the cookie value in a file (for scripting)' >> $conf
echo '$SAVE_COOKIE = 1;' >> $conf


#############################################################################
# INSTALLATION DIRECTORY
#############################################################################
echo '' >> $conf;
echo \$INSTALLDIR = \'$PWD/\'\; >> $conf; 


# Now add the variables that need user interaction

#
# FIND THE UTILITIES
#
echo '' >> $conf
echo '' >> $conf
echo '# System Utilities' >> $conf



#
# GREP
#
echo ''
echo '---------------------------------------------------------------'
echo ''
echo 'Autopsy uses the grep utility from your local system.' 
found=0
for d in $dirs 
  do if (test -x ${d}grep) then
    echo \$GREP_EXE = \'${d}grep\'\; >> $conf; 
    echo "grep found: ${d}grep";
    grepexe="${d}grep";
    found=1; 
    break; 
  fi;
done

# Prompt if not found
if (test $found -eq 0) then
  echo 'ERROR: grep utility not found';
  echo 'Enter location of executable:';
  while (test 1 -eq 1) 
    do read grepexe;
    if (test -x "$grepexe") then
	  echo \$GREP_EXE = \'$grepexe\'\; >> $conf; 
      break;
    else
      echo 'grep was not found (try again):';
    fi;
  done
fi



#############################################################################
# The Sleuth Kit
#############################################################################

echo '' >> $conf
echo '' >> $conf
echo '# Directories' >> $conf

# The Sleuth Kit
echo ''
echo '---------------------------------------------------------------'
echo ''
echo 'Autopsy uses forensic tools from The Sleuth Kit.' 
echo '          http://www.sleuthkit.org/sleuthkit/'
echo ''
echo 'Enter the directory where you installed it:'
while (test 1 -eq 1) 
  do read tskdir;
  if (test -x "${tskdir}/bin/icat") then
    if (test -x "${tskdir}/bin/fls") then
      echo '  Sleuth Kit bin directory was found';
      echo \$TSKDIR = \'${tskdir}/bin\'\; >> $conf;
      break;
    else
      echo 'The Sleuth Kit was not fully found (did you give me a TCT or TASK directory?) (try again):';
    fi
  else
    echo 'The Sleuth Kit was not found (try again):';
  fi;
done


# Test for latest version

ver=`"${tskdir}/bin/fls" -V | awk '/The Sleuth Kit ver / {print $5}'`;
echo "  Version $ver found";


if (test "$ver" '<' "$minver") then 
  echo "Your version of The Sleuth Kit is not current enough - $minver is needed";
  exit 1;
elif (test "$ver" '<' "$curtskver") then 
	echo '';
    echo "*** NOTE: A more recent version ($curtskver) of The Sleuth Kit Exists ***"
	echo "  [Press Enter to Continue]";
	read foo;

else
	echo '  Required version found';
fi


# Check that file exists in TSK and if not then use the local
# version
if (test -x "${tskdir}/bin/file") then
  echo \$FILE_EXE = \'${tskdir}/bin/file\'\; >> $conf; 
else

echo ''
echo '---------------------------------------------------------------'
echo ''
echo 'The file command was not found in TSK, we will use the system copy.'
found=0
for d in $dirs 
  do if (test -x ${d}file) then
    echo \$FILE_EXE = \'${d}file\'\; >> $conf; 
    echo "file found: ${d}file";
    fileexe="${d}file";
    found=1; 
    break; 
  fi;
done

# Prompt if not found
if (test $found -eq 0) then
  echo 'ERROR: file utility not found';
  echo 'Enter location of executable:';
  while (test 1 -eq 1) 
    do read fileexe;
    if (test -x "$fileexe") then
	  echo \$FILE_EXE = \'$fileexe\'\; >> $conf; 
      break;
    else
      echo 'file was not found (try again):';
    fi;
  done
fi
fi


# NSRL
echo ''
echo '---------------------------------------------------------------'
echo ''
echo 'The NIST National Software Reference Library (NSRL) contains'
echo 'hash values of known good and bad files.'
echo '         http://www.nsrl.nist.gov'
echo ''
echo 'Have you purchased or downloaded a copy of the NSRL (y/n) [n]'
read rep;
if (test "$rep" = "y") then

  echo 'Enter the directory where you installed it:'
  while (test 1 -eq 1) 
    do read nsrldir;
    if (test "$nsrldir" = "cancel") then
        echo \$NSRLDB = \'\'\; >> $conf;
		break;
	fi;
    if (test -f "${nsrldir}/NSRLFile.txt") then
      echo '  NSRL database was found (NSRLFile.txt)';
      echo \$NSRLDB = \'${nsrldir}/NSRLFile.txt\'\; >> $conf;

	  if (test -f "${nsrldir}/NSRLFile.txt-md5.idx") then
		echo '  NSRL Index file found (NSRLFile.txt-md5.idx)';
      else
        echo '  NSRL Index file not found, do you want it created? (y/n) [n]:'
        read rep;
        if (test "$rep" = "y") then
          echo ''
          echo '-------------- begin hfind output --------------'
          "${tskdir}/bin/hfind" -i nsrl-md5 "${nsrldir}/NSRLFile.txt";
          echo '--------------- end hfind output ---------------'
          echo ''
		fi;
	  fi;
      break;
    else
      echo 'The NSRL was not found (the directory should have NSRLFile.txt in it)';
	  echo 'Enter a new directory (or cancel to stop):';
    fi;
  done
else
  echo \$NSRLDB = \'\'\; >> $conf;
fi;

#############################################################################
# EVIDENCE LOCKER
#############################################################################
mdone=0
echo ''
echo '---------------------------------------------------------------'
echo ''
echo 'Autopsy saves configuration files, audit logs, and output to the'
echo 'Evidence Locker directory.'
echo ''
echo 'Enter the directory that you want to use for the Evidence Locker:';
read locker;
if (test -d "${locker}") then
  echo "  $locker already exists"
else
  echo '';
  echo "WARNING: $locker does not exist"
  mdone=1
fi

echo \$LOCKDIR = \'${locker}\'\; >> $conf;


#############################################################################
# CLEANUP
#############################################################################
echo ''
echo '---------------------------------------------------------------'
echo ''
echo "Settings saved to $conf."
echo "Execute the './autopsy' command to start with default settings."
echo ''