#!/bin/bash
#===============================================================================
#
# DIRECTORY:
#   /home/*/.local/share/nautilus/scripts/05c-Linux/
# OR
#   /home/*/.gnome2/nautilus-sctipts/05c-Linux/ (deprecated)
#
# FILE:
#   05-E01-dump-sha512crypt
#
# USAGE:
#   Right click on a EWF_E01 image (.E01) and
#   choose this nautilus script from the context menu.
#
# OPTIONS:
#   none
#
# DESCRIPTION:
#   Extracts the Hashes out of a GNU/Linux system
#
# REQUIREMENTS:
#   bash, zenity, sleuthkit and awk
#
# BUGS:
#   ---
#
# NOTES:
#   Tested on
#   - Debian 8+
#   - Arch Linux
#
# AUTHOR:
#   Patrick Neumann, patrick@neumannsland.de
#
# COMPANY:
#   (privately)
#
# VERSION:
#   0.9 (beta)
#
# LINK TO THE MOST CURRENT VERSIONS:
#   https://...
#
# CREATED:
#   19.06.2020
#
# COPYRIGHT (C):
#   2015-2020 - Patrick Neumann
#
# LICENSE:
#   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 3 of the License, or
#   (at your option) any later version.
#
# WARRANTY:
#   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.
#
#   You should have received a copy of the GNU General Public License
#   along with this program. If not, see <http://www.gnu.org/licenses/>.
#
# TODO:
#   ----
#
# HISTORY:
#   0.9 - Patrick Neumann - Initial (public) release
#
#===============================================================================

#-------------------------------------------------------------------------------
# Additional supported Distribution(s) (add before Library!).
#-------------------------------------------------------------------------------
# fred-report-templates have to be copied manually to!
SUPPORTED_OSR="arch"

#-------------------------------------------------------------------------------
# Check for library (casualscripter_nautilus-scripts_functions.sh).
#-------------------------------------------------------------------------------
readonly LIBRARY="${0%/*/*}/.casualscripter_nautilus-scripts_functions.sh"
if [ ! -f "${LIBRARY}" ] ; then
  zenity --error \
         --text \
         "ERROR: casualscripter_nautilus-scripts_functions.sh MISSING!"
  exit 1
fi

source "${LIBRARY}"

#-------------------------------------------------------------------------------
# Checks (see library "casualscripter_nautilus-scripts_functions.sh").
#-------------------------------------------------------------------------------
check_dep "${FCAT_BIN}" "sleuthkit"
check_dep "${AWK_BIN}" "awk"

check_ext "${SOURCE}" "[eE]01"

check_tmp

#-------------------------------------------------------------------------------
# A little bit of configuration before the magic.
#-------------------------------------------------------------------------------
readonly OFFSET="$( choose_partition "${SOURCE}" | ${AWK_BIN} -F "_" '{ print $3; }' )"

readonly SHADOW="${TMP}/${OFFSET}-shadow.txt"
readonly SHA512="${TMP}/${OFFSET}-sha512.txt"

#-------------------------------------------------------------------------------
# Extract hashes from /etc/shadow
#-------------------------------------------------------------------------------
if ! [ -f "${SHADOW}" ] ; then
  ${FCAT_BIN} -o "${OFFSET}" "/etc/shadow" "${SOURCE}" > "${SHADOW}"
fi

if ! [ -f "${SHA512}" ] ; then
  ${AWK_BIN} -F ":" '$2 ~ /.{3,}/ { print $2; }' "${SHADOW}" > "${SHA512}"
fi

#-------------------------------------------------------------------------------
# Display content of the resultfile "sha512.txt".
#-------------------------------------------------------------------------------
display_resultfile "${SHA512}"

exit 0