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clamav-unofficial-sigs.sh
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clamav-unofficial-sigs.sh
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#!/usr/bin/env bash
# shellcheck disable=SC2119
# shellcheck disable=SC2120
# shellcheck disable=SC2128
# shellcheck disable=SC2154
################################################################################
# You are free to use, modify and distribute, however you may not remove this notice.
# Copyright (c) Adrian Jon Kriel
# License: BSD (Berkeley Software Distribution)
################################################################################
#
# Script updates can be found at: https://github.com/micneon/clamav-unofficial-sigs
#
# Originially based on Script provided by Bill Landry ([email protected]).
# Patches and other fixes by Michael Angenendt ([email protected])
#
################################################################################
#
# THERE ARE NO USER CONFIGURABLE OPTIONS IN THIS SCRIPT
# ALL CONFIGURATION OPTIONS ARE LOCATED IN THE INCLUDED CONFIGURATION FILE
#
################################################################################
###### ####### # # ####### ####### ####### ###### ### #######
# # # # ## # # # # # # # # #
# # # # # # # # # # # # # # #
# # # # # # # # # # ##### # # # #
# # # # # # # # # # # # # # #
# # # # # ## # # # # # # # #
###### ####### # # ####### # ####### ###### ### #
################################################################################
# Detect to make sure the entire script is avilable, fail if the script is missing contents
if [ "$(tail -n 1 "${0}" | head -n 1 | cut -c 1-7)" != "exit \$?" ] ; then
echo "FATAL ERROR: Script is incomplete, please redownload"
exit 1
fi
# Trap the keyboard interrupt (Ctrl + C)
trap xshok_control_c SIGINT
################################################################################
# HELPER FUNCTIONS
################################################################################
# Support user config settings for applying file and directory access permissions.
function perms() {
if [ -n "${clam_user}" ] && [ -n "${clam_group}" ] ; then
"${@:-}"
fi
}
# Prompt a user if they should complete an action with Y or N
# Usage: xshok_prompt_confirm
# if xshok_prompt_confirm ; then
# xshok_prompt_confirm && echo "accepted"
# xshok_prompt_confirm && echo "yes" || echo "no"
# shellcheck disable=SC2120
function xshok_prompt_confirm() { # optional_message
message="${1:-Are you sure?}"
while true; do
read -r -p "${message} [y/N]" response < /dev/tty
case "${response}" in
[yY]) return 0 ;;
[nN]) return 1 ;;
*) printf " \\033[31m %s \\n\\033[0m" "invalid input"
esac
done
}
# Create a pid file
function xshok_create_pid_file() { # pid.file
if [ "${1}" ] ; then
pidfile="${1}"
if ! echo $$ > "${pidfile}" ; then
xshok_pretty_echo_and_log "ERROR: Could not create PID file: ${pidfile}"
exit 1
fi
else
xshok_pretty_echo_and_log "ERROR: Missing value for option"
exit 1
fi
}
# Intercept ctrl+c and calls the cleanup function
function xshok_control_c() {
echo
xshok_pretty_echo_and_log "---------------| Exiting ... Please wait |---------------" "-"
xshok_cleanup
exit $?
}
# Cleanup function
function xshok_cleanup() {
# Wait for all processes to end
wait
xshok_pretty_echo_and_log " Done " "#"
return $?
}
# Check if the current running user is the root user, otherwise return false
function xshok_is_root() {
if [ "$(uname -s)" == "SunOS" ] ; then
id_bin="/usr/xpg4/bin/id"
else
id_bin="$(command -v id 2> /dev/null)"
fi
if [ "$($id_bin -u)" == 0 ] ; then
return 0
else
return 1 # Not root
fi
}
# Check if its a file, otherwise return false
function xshok_is_file() { # filepath
filepath="${1}"
if [ -f "${filepath}" ] ; then
return 0 ;
else
return 1 ; # Not a file
fi
}
# Check if filepath is a subdir, otherwise return false
# Usage: xshok_is_subdir "filepath"
# xshok_is_subdir "/root/" - false
# xshok_is_subdir "/usr/local/etc" && echo "yes" - yes
function xshok_is_subdir() { # filepath
shopt -s extglob; filepath="${filepath%%+(/)}"
if [ -d "$filepath" ] ; then
res="${filepath//[^\/]}"
if [ "${#res}" -gt 1 ] ; then
return 0 ;
else
return 1 ; # Not a subdir
fi
else
return 1 ; # Not a dir
fi
}
# Create a dir and set the ownership
function xshok_mkdir_ownership() { # path
if [ "${1}" ] ; then
if ! mkdir -p "${1}" 2>/dev/null ; then
xshok_pretty_echo_and_log "ERROR: Could not create directory: ${1}"
exit 1
fi
perms chown -f "${clam_user}:${clam_group}" "${1}" > /dev/null 2>&1
else
xshok_pretty_echo_and_log "ERROR: Missing value for option"
exit 1
fi
}
# Check if a user and group exists on the system otherwise return false
# Usage:
# xshok_is_subdir "username" && echo "user found" || echo "no"
# xshok_is_subdir "username" "groupname" && echo "user and group found" || echo "no"
function xshok_user_group_exists() { # username groupname
if [ "$(uname -s)" == "SunOS" ] ; then
id_bin="/usr/xpg4/bin/id"
else
id_bin="$(command -v id 2> /dev/null)"
fi
if [ "${2}" ] ; then
if [ "$(uname -s)" == "Darwin" ] ; then
#use ruby, as this is the best way. Ruby is always avilable as brew uses ruby
ruby -e 'require "etc"; puts Etc::getgrnam("_clamav").gid' > /dev/null 2>&1
ret="$?"
else
getent_bin="$(command -v getent 2> /dev/null)"
$getent_bin group "${2}" >/dev/null 2>&1
ret="$?"
fi
fi
if [ "${1}" ] ; then
if $id_bin -u "${1}" > /dev/null 2>&1 ; then
if [ "${2}" ] ; then
if [ "$ret" -eq 0 ] ; then
return 0 ; # User and group exists
else
return 1 ; # Group does NOT exist
fi
else
return 0 ; # User exists
fi
else
return 1 ; # User does NOT exist
fi
else
xshok_pretty_echo_and_log "ERROR: Missing value for option"
exit 1
fi
}
# Handle comments with/out borders and logging.
# Usage:
# pretty_echo_and_log "one"
# one
# pretty_echo_and_log "two" "-"
# ---
# two
# ---
# pretty_echo_and_log "three" "=" "8"
# ========
# three
# ========
# pretty_echo_and_log "" "/\" "7"
# /\/\/\/\/\/\
# type: e = error, w= warning, a = alert, n = notice
# will auto detect using the first word "error,warning,alert,notice"
# type e will make a == border
# type w will make a -- border
# type a will make a ** border
# type n will make a ++ border
function xshok_pretty_echo_and_log() { # "string" "repeating" "count" "type"
#detect if running under cron and silence
mystring="$1"
myrepeating="$2"
mycount="$3"
mytype="$4"
if [ "$comment_silence" != "yes" ] && [ "$force_verbose" != "yes" ]; then
if [ ! -t 1 ] ; then
comment_silence="yes"
fi
fi
# always show errors and alerts
if [ -z "$mytype" ] ; then
shopt -s nocasematch
if [[ "$mystring" =~ "ERROR:" ]] || [[ "$mystring" =~ "ERROR " ]] ; then
mytype="e"
elif [[ "$mystring" =~ "WARNING:" ]] || [[ "$mystring" =~ "WARNING " ]] ; then
mytype="w"
elif [[ "$mystring" =~ "ALERT:" ]] || [[ "$mystring" =~ "ALERT " ]] ; then
mytype="a"
elif [[ "$mystring" =~ "NOTICE:" ]] || [[ "$mystring" =~ "NOTICE " ]] ; then
mytype="n"
fi
fi
if [ "$mytype" == "e" ] || [ "$mytype" == "a" ] ; then
comment_silence="no"
fi
# Handle comments is not silenced or type
if [ "$comment_silence" != "yes" ] ; then
if [ -z "$myrepeating" ] ; then
if [ "$mytype" == "e" ] ; then
myrepeating="="
elif [ "$mytype" == "w" ] ; then
myrepeating="-"
elif [ "$mytype" == "a" ] ; then
myrepeating="*"
elif [ "$mytype" == "n" ] ; then
myrepeating="+"
fi
fi
if [ -z "$myrepeating" ] ; then
echo "${mystring}"
else
myvar=""
if [ -z "$mycount" ] ; then
mycount="${#mystring}"
fi
for (( n = 0; n < mycount; n++ )) ; do
myvar="${myvar}${myrepeating}"
done
if [ -n "${mystring}" ] ; then
echo -e "${myvar}\\n${1}\\n${myvar}"
else
echo -e "${myvar}"
fi
fi
fi
# Handle logging
if [ "$enable_log" == "yes" ] ; then
#filter ===, ---
mystring=${1//===}
mystring=${mystring//---}
if [ -n "$mystring" ] ; then
if [ -n "$log_pipe_cmd" ] ; then
echo "${mystring}" | $log_pipe_cmd
else
if [ ! -e "${log_file_path}/${log_file_name}" ] ; then
# xshok_mkdir_ownership "$log_file_path"
mkdir -p "$log_file_path"
touch "${log_file_path}/${log_file_name}" 2>/dev/null
perms chown -f "${clam_user}:${clam_group}" "${log_file_path}/${log_file_name}"
fi
if [ ! -w "${log_file_path}/${log_file_name}" ] ; then
echo "WARNING: Logging Disabled, as file not writable: ${log_file_path}/${log_file_name}"
enable_log="no"
else
echo "$(date "+%b %d %T")" "${mystring}" >> "${log_file_path}/${log_file_name}"
fi
fi
fi
fi
}
# Check if the $2 value is not null and does not start with -
function xshok_check_s2() { # value1 value2
if [ "${1}" ] ; then
if [[ "${1}" =~ ^-.* ]] ; then
xshok_pretty_echo_and_log "ERROR: Missing value for option or value begins with -"
exit 1
fi
else
xshok_pretty_echo_and_log "ERROR: Missing value for option"
exit 1
fi
}
# Time remaining information function
function xshok_draw_time_remaining() { #time_remaining #update_hours #name
if [ "${1}" ] && [ "${2}" ] ; then
time_remaining="${1}"
hours_left="$((time_remaining / 3600))"
minutes_left="$((time_remaining % 3600 / 60))"
xshok_pretty_echo_and_log "${2} hours have not yet elapsed since the last ${3} update check"
xshok_pretty_echo_and_log "No update check was performed at this time" "-"
xshok_pretty_echo_and_log "Next check will be performed in approximately ${hours_left} hour(s), ${minutes_left} minute(s)"
fi
}
# Download function
function xshok_file_download() { #outputfile #url #notimestamp
if [ "$downloader_debug" == "yes" ] ; then
xshok_pretty_echo_and_log "url: ${2} >> outputfile: ${1} | ${3}"
fi
if [ "${1}" ] && [ "${2}" ] ; then
if [ -n "$curl_bin" ] ; then
if [ -f "${1}" ] ; then
# shellcheck disable=SC2086
$curl_bin --fail --compressed $curl_proxy $curl_insecure $curl_output_level --connect-timeout "${downloader_connect_timeout}" --remote-time --location --retry "${downloader_tries}" --max-time "${downloader_max_time}" --time-cond "${1}" --output "${1}" "${2}" 2>&11
result=$?
else
# shellcheck disable=SC2086
$curl_bin --fail --compressed $curl_proxy $curl_insecure $curl_output_level --connect-timeout "${downloader_connect_timeout}" --remote-time --location --retry "${downloader_tries}" --max-time "${downloader_max_time}" --output "${1}" "${2}" 2>&11
result=$?
fi
else
if [ ! "${3}" ] ; then
# the following is required because wget, cannot do --timestamping and --output-document together
this_dir="$( cd -P "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null 2>&1 && pwd )"
output_file="$1"
url="$2"
output_dir="${output_file%/*}"
output_file="${output_file##*/}"
url_file="${url##*/}"
wget_output_link=""
cd "${output_dir}" || exit
if [ "$output_file" != "$url_file" ] ; then
if [ ! -f "$url_file" ] ; then
if [ ! -f "$output_file" ] ; then
touch "$output_file"
fi
ln -s "$output_file" "$url_file"
wget_output_link="$url_file"
fi
fi
# shellcheck disable=SC2086
$wget_bin $wget_compression $wget_proxy $wget_insecure $wget_output_level --connect-timeout="${downloader_connect_timeout}" --random-wait --tries="${downloader_tries}" --timeout="${downloader_max_time}" --timestamping "${2}" 2>&12
result=$?
if [ -z "$wget_output_link" ] ; then
if [ -L "$wget_output_link" ] ; then
rm -f "$wget_output_link"
fi
fi
cd "$this_dir" || exit
else
# shellcheck disable=SC2086
$wget_bin $wget_compression $wget_proxy $wget_insecure $wget_output_level --connect-timeout="${downloader_connect_timeout}" --random-wait --tries="${downloader_tries}" --timeout="${downloader_max_time}" --output-document="${1}" "${2}" 2>&12
result=$?
fi
fi
return $result
fi
}
# Handle list of database files
function clamav_files() {
echo "${clam_dbs}/${db}" >> "${current_tmp}"
if [ "$keep_db_backup" == "yes" ] ; then
echo "${clam_dbs}/${db}-bak" >> "${current_tmp}"
fi
}
# Manage the databases and allow multi-dimensions as well as global overrides
# Since the datbases are basically a multi-dimentional associative arrays in bash
# ratings: LOW | MEDIUM | HIGH | REQUIRED | LOWONLY | MEDIUMONLY | LOWMEDIUMONLY | DISABLED
function xshok_database() { # rating database_array
# Assign
current_rating="${1}"
declare -a current_dbs=( "${@:2}" )
# Zero
declare -a new_dbs=( )
if [ -n "${current_dbs[0]}" ] ; then
if [ ${#current_dbs} -ge 1 ] ; then
for db_name in "${current_dbs[@]}" ; do
# Checks
if [ "$enable_yararules" == "no" ] ; then # YARA rules are disabled
if [[ "$db_name" == *".yar"* ]] ; then # If it's the value you want to delete
continue # Skip to the next value
fi
fi
if [ -z "$current_rating" ] ; then
new_dbs+=( "$db_name" )
else
if [[ ! "$db_name" = *"|"* ]] ; then # This old format
new_dbs+=( "$db_name" )
else
db_name_rating="${db_name#*|}"
db_name="${db_name%|*}"
if [ "$db_name_rating" != "DISABLED" ] ; then
if [ "$db_name_rating" == "$current_rating" ] ; then
new_dbs+=( "$db_name" )
elif [ "$db_name_rating" == "REQUIRED" ] ; then
new_dbs+=( "$db_name" )
elif [ "$current_rating" == "LOW" ] ; then
if [ "$db_name_rating" == "LOWONLY" ] || [ "$db_name_rating" == "LOW" ] || [ "$db_name_rating" == "LOWMEDIUMONLY" ] ; then
new_dbs+=( "$db_name" )
fi
elif [ "$current_rating" == "MEDIUM" ] ; then
if [ "$db_name_rating" == "MEDIUMONLY" ] || [ "$db_name_rating" == "MEDIUM" ] || [ "$db_name_rating" == "LOW" ] || [ "$db_name_rating" == "LOWMEDIUMONLY" ] ; then
new_dbs+=( "$db_name" )
fi
elif [ "$current_rating" == "HIGH" ] ; then
if [ "$db_name_rating" == "HIGH" ] || [ "$db_name_rating" == "MEDIUM" ] || [ "$db_name_rating" == "LOW" ]; then
new_dbs+=( "$db_name" )
fi
fi
fi
fi
fi
done
fi
fi
echo "${new_dbs[@]}" | xargs # Remove extra whitespace
}
# Manage the databases to be removed and allow multi-dimensions as well as global overrides
# Since the datbases are basically a multi-dimentional associative arrays in bash
# ratings: LOW | MEDIUM | HIGH | REQUIRED | LOWONLY | MEDIUMONLY | LOWMEDIUMONLY | DISABLED
function xshok_remove_database() { # rating database_array
# Assign
current_rating="${1}"
declare -a current_dbs=( "${@:2}" )
# Zero
declare -a new_dbs=( )
if [ ${#current_dbs} -ge 1 ] ; then
for db_name in "${current_dbs[@]}" ; do
db_name_rating="${db_name#*|}"
db_name="${db_name%|*}"
removed="no"
# Checks
if [ "$current_rating" == "DISABLED" ] ; then
new_dbs+=( "$db_name" )
removed="yes"
elif [ "$current_rating" == "HIGH" ] ; then
if [ "$db_name_rating" == "LOWONLY" ] || [ "$db_name_rating" == "LOWMEDIUMONLY" ] ||[ "$db_name_rating" == "MEDIUMONLY" ] ; then
new_dbs+=( "$db_name" )
removed="yes"
fi
elif [ "$current_rating" == "MEDIUM" ] ; then
if [ "$db_name_rating" == "HIGH" ] || [ "$db_name_rating" == "LOWONLY" ] ; then
new_dbs+=( "$db_name" )
removed="yes"
fi
elif [ "$current_rating" == "LOW" ] ; then
if [ "$db_name_rating" == "MEDIUMONLY" ] || [ "$db_name_rating" == "MEDIUM" ] || [ "$db_name_rating" == "HIGH" ]; then
new_dbs+=( "$db_name" )
removed="yes"
fi
fi
if [ "$removed" == "no" ] ; then # not already removed, process futher
if [ "$enable_yararules" == "no" ] && [[ "$db_name" == *".yar"* ]] ; then # YARA rules are disabled AND it's the value you want to delete
new_dbs+=( "$db_name" )
fi
fi
done
fi
echo "${new_dbs[@]}" | xargs # Remove extra whitespace
}
################################################################################
# ADDITIONAL PROGRAM FUNCTIONS
################################################################################
# Generates a man config and installs it
function install_man() {
if [ -n "$pkg_mgr" ] || [ -n "$pkg_rm" ] ; then
xshok_pretty_echo_and_log "This script (clamav-unofficial-sigs) was installed on the system via ${pkg_mgr}"
exit 1
fi
xshok_pretty_echo_and_log ""
xshok_pretty_echo_and_log "Generating man file for install...."
# Use defined varibles or attempt to use default varibles
if [ ! -e "${man_dir}/${man_filename}" ] ; then
mkdir -p "$man_dir"
touch "${man_dir}/${man_filename}" 2>/dev/null
fi
if [ ! -w "${man_dir}/${man_filename}" ] ; then
xshok_pretty_echo_and_log "ERROR: man install aborted, as file not writable: ${man_dir}/${man_filename}"
else
BOLD="\\fB"
#REV=""
NORM="\\fR"
manresult="$(help_and_usage "man")"
# Our template..
cat << EOF > "${man_dir}/${man_filename}"
.\\" Manual page for ClamAV Unofficial Signature Updater
.TH clamav-unofficial-sigs 8 "${script_version_date}" "Version: ${script_version}" "SCRIPT COMMANDS"
.SH NAME
clamav-unofficial-sigs \\- Download, test, and install third-party ClamAV signature databases.
.SH SYNOPSIS
.B clamav-unofficial-sigs
.RI [ options ]
.SH DESCRIPTION
\\fBclamav-unofficial-sigs\\fP provides a simple way to download, test, and update third-party signature databases provided by Sanesecurity, FOXHOLE, OITC, BOFHLAND, CRDF, Porcupine, Securiteinfo, MalwarePatrol, Yara-Rules Project, etc. It will also generate and install cron, logrotate, and man files.
.SH UPDATES
Script updates can be found at: \\fBhttps://github.com/micneon/clamav-unofficial-sigs\\fP
.SH OPTIONS
This script follows the standard GNU command line syntax.
.LP
$manresult
.SH SEE ALSO
.BR clamd (8),
.BR clamscan (1)
.SH COPYRIGHT
Copyright (c) Adrian Jon Kriel
.TP
You are free to use, modify and distribute, however you may not remove this notice.
.SH LICENSE
BSD (Berkeley Software Distribution)
.SH BUGS
Report bugs to \\fBhttps://github.com/micneon/clamav-unofficial-sigs\\fP
.SH AUTHOR
Adrian Jon Kriel
Originially based on Script provide by Bill Landry
EOF
fi
xshok_pretty_echo_and_log "Completed: man installed, as file: ${man_dir}/${man_filename}"
}
# Generate a logrotate config and install it
function install_logrotate() {
if [ -n "$pkg_mgr" ] || [ -n "$pkg_rm" ] ; then
xshok_pretty_echo_and_log "This script (clamav-unofficial-sigs) was installed on the system via ${pkg_mgr}"
exit 1
fi
xshok_pretty_echo_and_log ""
xshok_pretty_echo_and_log "Generating logrotate file for install...."
# Use defined varibles or attempt to use default varibles
if [ -z "$logrotate_user" ] ; then
logrotate_user="${clam_user}";
fi
if [ -z "$logrotate_group" ] ; then
logrotate_group="${clam_group}";
fi
if [ -z "$logrotate_log_file_full_path" ] ; then
logrotate_log_file_full_path="${log_file_path}/${log_file_name}"
fi
if [ ! -e "${logrotate_dir}/${logrotate_filename}" ] ; then
mkdir -p "$logrotate_dir"
touch "${logrotate_dir}/${logrotate_filename}" 2>/dev/null
fi
if [ ! -w "${logrotate_dir}/${logrotate_filename}" ] ; then
xshok_pretty_echo_and_log "ERROR: logrotate install aborted, as file not writable: ${logrotate_dir}/${logrotate_filename}"
else
# Our template..
cat << EOF > "${logrotate_dir}/${logrotate_filename}"
#######################################################
# This file contains the logrotate settings for clamav-unofficial-sigs.sh
###################
# You are free to use, modify and distribute, however you may not remove this notice.
# Copyright (c) Adrian Jon Kriel
##################
#
# Script updates can be found at: https://github.com/micneon/clamav-unofficial-sigs
#
# Originially based on:
# Script provide by Bill Landry ([email protected]).
#
# License: BSD (Berkeley Software Distribution)
#
##################
# Automatically Generated: $(date)
##################
#
# This logrotate file will rotate the logs generated by the clamav-unofficial-sigs.sh
#
# To Adjust the logrotate values, edit your configs and run
# bash clamav-unofficial-sigs.sh --install-logrotate to generate a new file.
$logrotate_log_file_full_path {
weekly
rotate 4
missingok
notifempty
compress
create 0640 ${logrotate_user} ${logrotate_group}
}
EOF
fi
xshok_pretty_echo_and_log "Completed: logrotate installed, as file: ${logrotate_dir}/${logrotate_filename}"
}
# Generate a cron config and install it
function install_cron() {
if [ -n "$pkg_mgr" ] || [ -n "$pkg_rm" ] ; then
xshok_pretty_echo_and_log "This script (clamav-unofficial-sigs) was installed on the system via {$pkg_mgr}"
exit 1
fi
xshok_pretty_echo_and_log ""
xshok_pretty_echo_and_log "Generating cron file for install...."
# Use defined varibles or attempt to use default varibles
if [ -z "$cron_minute" ] ; then
cron_minute="$(( ( RANDOM % 59 ) + 1 ))"
fi
if [ -z "$cron_user" ] ; then
cron_user="${clam_user}";
fi
if [ -z "$cron_bash" ] ; then
cron_bash="$(command -v bash 2> /dev/null)"
fi
if [ -z "$cron_script_full_path" ] ; then
cron_script_full_path="$this_script_full_path"
fi
if [ "$cron_sudo" == "yes" ] ; then
cron_sudo="sudo -u"
fi
if [ ! -e "${cron_dir}/${cron_filename}" ] ; then
mkdir -p "$cron_dir"
touch "${cron_dir}/${cron_filename}" 2>/dev/null
fi
if [ ! -w "${cron_dir}/${cron_filename}" ] ; then
xshok_pretty_echo_and_log "ERROR: cron install aborted, as file not writable: ${cron_dir}/${cron_filename}"
else
# Our template..
cat << EOF > "${cron_dir}/${cron_filename}"
#######################################################
# This file contains the cron settings for clamav-unofficial-sigs.sh
###################
# You are free to use, modify and distribute, however you may not remove this notice.
# Copyright (c) Adrian Jon Kriel
##################
#
# Script updates can be found at: https://github.com/micneon/clamav-unofficial-sigs
#
# Originially based on:
# Script provide by Bill Landry ([email protected]).
#
# License: BSD (Berkeley Software Distribution)
#
##################
# Automatically Generated: $(date)
##################
#
# This cron file will execute the clamav-unofficial-sigs.sh script that
# currently supports updating third-party signature databases provided
# by Sanesecurity, SecuriteInfo, MalwarePatrol, OITC, etc.
#
# The script is set to run hourly, at a random minute past the hour, and the
# script itself is set to randomize the actual execution time between
# 60 - 600 seconds. To Adjust the cron values, edit your configs and run
# bash clamav-unofficial-sigs.sh --install-cron to generate a new file.
# Uncomment to enable emails to the root user
#MAILTO=root
$cron_minute * * * * ${cron_sudo} ${cron_user} [ -x ${cron_script_full_path} ] && ${cron_bash} ${cron_script_full_path}
#######################################################
EOF
fi
xshok_pretty_echo_and_log "Completed: cron installed, as file: ${cron_dir}/${cron_filename}"
}
# Auto upgrade the master.conf and the
function xshok_upgrade() {
if [ "$allow_upgrades" == "no" ] ; then
xshok_pretty_echo_and_log "ERROR: --upgrade has been disabled, allow_upgrades=no"
exit 1
fi
if ! xshok_is_root ; then
xshok_pretty_echo_and_log "ERROR: Only root can run the upgrade"
exit 1
fi
xshok_pretty_echo_and_log "Checking for updates ..."
found_upgrade="no"
if [ -n "$curl_bin" ] ; then
# shellcheck disable=SC2086
latest_version="$($curl_bin --compressed $curl_proxy $curl_insecure $curl_output_level --connect-timeout "${downloader_connect_timeout}" --remote-time --location --retry "${downloader_tries}" --max-time "${downloader_max_time}" "https://raw.githubusercontent.com/micneon/clamav-unofficial-sigs/${git_branch}/clamav-unofficial-sigs.sh" 2>&11 | $grep_bin "^script_version=" | head -n1 | cut -d '"' -f 2)"
# shellcheck disable=SC2086
latest_config_version="$($curl_bin --compressed $curl_proxy $curl_insecure $curl_output_level --connect-timeout "${downloader_connect_timeout}" --remote-time --location --retry "${downloader_tries}" --max-time "${downloader_max_time}" "https://raw.githubusercontent.com/micneon/clamav-unofficial-sigs/${git_branch}/config/master.conf" 2>&11 | $grep_bin "^config_version=" | head -n1 | cut -d '"' -f 2)"
else
# shellcheck disable=SC2086
latest_version="$($wget_bin $wget_compression $wget_proxy $wget_insecure $wget_output_level --connect-timeout="${downloader_connect_timeout}" --random-wait --tries="${downloader_tries}" --timeout="${downloader_max_time}" "https://raw.githubusercontent.com/micneon/clamav-unofficial-sigs/${git_branch}/clamav-unofficial-sigs.sh" -O - 2>&12 | $grep_bin "^script_version=" | head -n1 | cut -d '"' -f 2)"
# shellcheck disable=SC2086
latest_config_version="$($wget_bin $wget_compression $wget_proxy $wget_insecure $wget_output_level --connect-timeout="${downloader_connect_timeout}" --random-wait --tries="${downloader_tries}" --timeout="${downloader_max_time}" "https://raw.githubusercontent.com/micneon/clamav-unofficial-sigs/${git_branch}/config/master.conf" -O - 2>&12 | $grep_bin "^config_version=" | head -n1 | cut -d '"' -f 2)"
fi
# config_dir/master.conf
if [ "$latest_config_version" ] ; then
# shellcheck disable=SC2183,SC2086
if [ "$(printf "%02d%02d%02d%02d" ${latest_config_version//./ })" -gt "$(printf "%02d%02d%02d%02d" ${config_version//./ })" ] ; then
found_upgrade="yes"
xshok_pretty_echo_and_log "ALERT: Upgrading config from v${config_version} to v${latest_config_version}"
if [ -w "${config_dir}/master.conf" ] && [ -f "${config_dir}/master.conf" ] ; then
echo "Downloading https://raw.githubusercontent.com/micneon/clamav-unofficial-sigs/${git_branch}/config/master.conf"
xshok_file_download "${work_dir}/master.conf.tmp" "https://raw.githubusercontent.com/micneon/clamav-unofficial-sigs/${git_branch}/config/master.conf" "notimestamp"
ret="$?"
if [ "$ret" -ne 0 ] ; then
xshok_pretty_echo_and_log "ERROR: Could not download https://raw.githubusercontent.com/micneon/clamav-unofficial-sigs/${git_branch}/config/master.conf"
exit 1
fi
if ! $grep_bin -m 1 "config_version" "${work_dir}/master.conf.tmp" > /dev/null 2>&1 ; then
echo "ERROR: Downloaded master.conf is incomplete, please re-run"
exit 1
fi
# Copy over permissions from old version
OCTAL_MODE="$(stat -c "%a" "${config_dir}/master.conf" 2> /dev/null)"
if [ -z "$OCTAL_MODE" ]; then
OCTAL_MODE="$(stat -f '%p' "${config_dir}/master.conf")"
fi
xshok_pretty_echo_and_log "Running update process"
if ! mv -f "${work_dir}/master.conf.tmp" "${config_dir}/master.conf" ; then
xshok_pretty_echo_and_log "ERROR: failed moving ${work_dir}/master.conf.tmp to ${config_dir}/master.conf"
exit 1
fi
if ! chmod "$OCTAL_MODE" "${config_dir}/master.conf" ; then
xshok_pretty_echo_and_log "ERROR: unable to set permissions on ${config_dir}/master.conf"
exit 1
fi
xshok_pretty_echo_and_log "Completed"
else
xshok_pretty_echo_and_log "ERROR: ${config_dir}/master.conf is not a file or is not writable"
exit 1
fi
fi
fi
if [ "$latest_version" ] ; then
# shellcheck disable=SC2183,SC2086
if [ "$(printf "%02d%02d%02d%02d" ${latest_version//./ })" -gt "$(printf "%02d%02d%02d%02d" ${script_version//./ })" ] ; then
found_upgrade="yes"
xshok_pretty_echo_and_log "ALERT: Upgrading script from v${script_version} to v${latest_version}"
if [ -w "${config_dir}/master.conf" ] && [ -f "${config_dir}/master.conf" ] ; then
echo "Downloading https://raw.githubusercontent.com/micneon/clamav-unofficial-sigs/${git_branch}/clamav-unofficial-sigs.sh"
xshok_file_download "${work_dir}/clamav-unofficial-sigs.sh.tmp" "https://raw.githubusercontent.com/micneon/clamav-unofficial-sigs/${git_branch}/clamav-unofficial-sigs.sh" "notimestamp"
ret=$?
if [ "$ret" -ne 0 ] ; then
xshok_pretty_echo_and_log "ERROR: Could not download https://raw.githubusercontent.com/micneon/clamav-unofficial-sigs/${git_branch}/clamav-unofficial-sigs.sh"
exit 1
fi
# Detect to make sure the entire script is avilable, fail if the script is missing contents
if [ "$(tail -n 1 "${work_dir}/clamav-unofficial-sigs.sh.tmp" | head -n 1 | cut -c 1-7)" != "exit \$?" ] ; then
echo "ERROR: Downloaded clamav-unofficial-sigs.sh is incomplete, please re-run"
exit 1
fi
# Copy over permissions from old version
OCTAL_MODE="$(stat -c "%a" "${this_script_full_path}" 2> /dev/null)"
if [ -z "$OCTAL_MODE" ]; then
OCTAL_MODE="$(stat -f '%p' "${this_script_full_path}")"
fi
xshok_pretty_echo_and_log "Inserting update process..."
# Generate the update script
cat > "${work_dir}/xshok_update_script.sh" << EOF
#!/usr/bin/env bash
echo "Running update process"
# Overwrite old file with new
if ! mv -f "${work_dir}/clamav-unofficial-sigs.sh.tmp" "${this_script_full_path}" ; then
echo "ERROR: failed moving ${work_dir}/clamav-unofficial-sigs.sh.tmp to ${this_script_full_path}"
rm -f \$0
exit 1
fi
if ! chmod "$OCTAL_MODE" "${this_script_full_path}" ; then
echo "ERROR: unable to set permissions on ${this_script_full_path}"
rm -f \$0
exit 1
fi
echo "Completed"
# echo "---------------------"
# echo "Optional, run as root: "
# echo "clamav-unofficial-sigs.sh --install-all"
echo "---------------------"
echo "Run once as root: "
echo "clamav-unofficial-sigs.sh --force"
#remove the tmp script before exit
rm -f \$0
EOF
# Replaced with $0, so code will update and then call itself with the same parameters it had
#exec "${0}" "$@"
bash_bin="$(command -v bash 2> /dev/null)"
exec "$bash_bin" "${work_dir}/xshok_update_script.sh"
echo "Running once as root"
else
xshok_pretty_echo_and_log "ERROR: ${config_dir}/master.conf is not a file or is not writable"
exit 1
fi
fi
fi
if [ "$found_upgrade" == "no" ] ; then
xshok_pretty_echo_and_log "No updates available"
fi
}
# Decode a third-party signature either by signature name
function decode_third_party_signature_by_signature_name() {
xshok_pretty_echo_and_log ""
xshok_pretty_echo_and_log "Input a third-party signature name to decode (e.g: Sanesecurity.Junk.15248) or"
xshok_pretty_echo_and_log "a hexadecimal encoded data string and press enter:"
read -r input
# Remove quotes and .UNOFFICIAL from the whitelist input string
input="$(echo "${input}" | tr -d "'" | tr -d '"' | tr -d '`')"
input=${input/\.UNOFFICIAL/}
if echo "${input}" | $grep_bin "\\." > /dev/null ; then
cd "$clam_dbs" || exit
sig="$($grep_bin "${input}:" ./*.ndb)"
if [ -n "$sig" ] ; then
db_file="${sig%:*}"
xshok_pretty_echo_and_log "${input} found in: ${db_file}"
xshok_pretty_echo_and_log "${input} signature decodes to:"
xshok_pretty_echo_and_log "$sig" | cut -d ":" -f 5 | perl -pe 's/([a-fA-F0-9]{2})|(\{[^}]*\}|\([^)]*\))/defined $2 ? $2 : chr(hex $1)/eg'
else
xshok_pretty_echo_and_log "Signature ${input} could not be found."
xshok_pretty_echo_and_log "This script will only decode ClamAV 'UNOFFICIAL' third-Party,"
xshok_pretty_echo_and_log "non-image based, signatures as found in the *.ndb databases."
fi
else
xshok_pretty_echo_and_log "Here is the decoded hexadecimal input string:"
echo "${input}" | perl -pe 's/([a-fA-F0-9]{2})|(\{[^}]*\}|\([^)]*\))/defined $2 ? $2 : chr(hex $1)/eg'
fi
}
# Hexadecimal encode an entire input string
function hexadecimal_encode_entire_input_string() {
xshok_pretty_echo_and_log ""
xshok_pretty_echo_and_log "Input the data string that you want to hexadecimal encode and then press enter. Do not include"
xshok_pretty_echo_and_log "any quotes around the string unless you want them included in the hexadecimal encoded output:"
read -r input
xshok_pretty_echo_and_log "Here is the hexadecimal encoded input string:"
echo "${input}" | perl -pe 's/(.)/sprintf("%02lx", ord $1)/eg'
}
# Hexadecimal encode a formatted input string
function hexadecimal_encode_formatted_input_string() {
xshok_pretty_echo_and_log ""
xshok_pretty_echo_and_log "Input a formated data string containing spacing fields '{}, (), *' that you want to hexadecimal"
xshok_pretty_echo_and_log "encode, without encoding the spacing fields, and then press enter. Do not include any quotes"
xshok_pretty_echo_and_log "around the string unless you want them included in the hexadecimal encoded output:"
read -r input
xshok_pretty_echo_and_log "Here is the hexadecimal encoded input string:"
echo "${input}" | perl -pe 's/(\{[^}]*\}|\([^)]*\)|\*)|(.)/defined $1 ? $1 : sprintf("%02lx", ord $2)/eg'
}
# GPG verify a specific Sanesecurity database file
function gpg_verify_specific_sanesecurity_database_file() { # databasefile
xshok_pretty_echo_and_log ""
if [ "$enable_gpg" == "no" ] ; then
xshok_pretty_echo_and_log "GnuPG / signature verification disabled" "-"
else
if [ "${1}" ] ; then
db_file="$(echo "${1}" | awk -F "/" '{print $NF}')"
if [ -r "${work_dir_sanesecurity}/${db_file}" ] ; then
xshok_pretty_echo_and_log "GPG signature testing database file: ${work_dir_sanesecurity}/${db_file}"
if [ -r "${work_dir_sanesecurity}/${db_file}.sig" ] ; then
if ! "$gpg_bin" -q --trust-model always --no-default-keyring --homedir "${work_dir_gpg}" --keyring "${work_dir_gpg}/ss-keyring.gpg" --verify "${work_dir_sanesecurity}/${db_file}.sig" "${work_dir_sanesecurity}/${db_file}" ; then
if "$gpg_bin" -q --always-trust --no-default-keyring --homedir "${work_dir_gpg}" --keyring "${work_dir_gpg}/ss-keyring.gpg" --verify "${work_dir_sanesecurity}/${db_file}.sig" "${work_dir_sanesecurity}/${db_file}" ; then
exit 0
else
exit 1
fi
else
exit 0
fi
else
xshok_pretty_echo_and_log "Signature ${db_file}.sig cannot be found."
fi
else
xshok_pretty_echo_and_log "File ${db_file} cannot be found or is not a Sanesecurity database file."
xshok_pretty_echo_and_log "Only the following Sanesecurity and OITC databases can be GPG signature tested:"
ls --ignore "*.sig" --ignore "*.md5" --ignore "*.ign2" --ignore "*.fp" "${work_dir_sanesecurity}"
fi
else
xshok_pretty_echo_and_log "ERROR: Missing value for option"
exit 1
fi
exit 1
fi
}
# Output system and configuration information
function output_system_configuration_information() {
xshok_pretty_echo_and_log ""
xshok_pretty_echo_and_log "*** SCRIPT INFORMATION ***"
xshok_pretty_echo_and_log "${this_script_name} ${script_version} (${script_version_date})"
xshok_pretty_echo_and_log "Master.conf Version: ${config_version}"
xshok_pretty_echo_and_log "Minimum required config: ${minimum_required_config_version}"
xshok_pretty_echo_and_log "*** SYSTEM INFORMATION ***"
$uname_bin -a
xshok_pretty_echo_and_log "*** CLAMSCAN LOCATION & VERSION ***"
xshok_pretty_echo_and_log "${clamscan_bin}"
$clamscan_bin --version | head -1
xshok_pretty_echo_and_log "*** RSYNC LOCATION & VERSION ***"
xshok_pretty_echo_and_log "${rsync_bin}"
$rsync_bin --version | head -1
if [ -n "$curl_bin" ] ; then
xshok_pretty_echo_and_log "*** CURL LOCATION & VERSION ***"
xshok_pretty_echo_and_log "${curl_bin}"
$curl_bin --version | head -1
else
xshok_pretty_echo_and_log "*** WGET LOCATION & VERSION ***"
xshok_pretty_echo_and_log "${wget_bin}"
$wget_bin --version | head -1
fi
if [ "$enable_gpg" == "yes" ] ; then
xshok_pretty_echo_and_log "*** GPG LOCATION & VERSION ***"
xshok_pretty_echo_and_log "${gpg_bin}"
$gpg_bin --version | head -1
fi
xshok_pretty_echo_and_log "*** DIRECTORY INFORMATION ***"
xshok_pretty_echo_and_log "Working Directory: ${work_dir}"
xshok_pretty_echo_and_log "Clam Database Directory: ${clam_dbs}"
if [ "$custom_config" != "no" ] ; then
if [ -d "$custom_config" ] ; then
# Assign the custom config dir and remove trailing / (removes / and //)
xshok_pretty_echo_and_log "Custom Configuration Directory: ${custom_config}"
else
xshok_pretty_echo_and_log "Custom Configuration File: ${custom_config}"
fi
else
xshok_pretty_echo_and_log "Configuration Directory: ${config_dir}"
fi
xshok_pretty_echo_and_log ""
}
# Make a signature database from an ascii file
function make_signature_database_from_ascii_file() {
xshok_pretty_echo_and_log ""
echo "
The '-m' script flag provides a way to create a ClamAV hexadecimal signature database (*.ndb) file
from a list of data strings stored in a clear-text ascii file, with one data string entry per line.
- Hexadecimal encoding can be either 'full' or 'formatted' on a per line basis:
Full line encoding should be used if there are no formatted spacing entries [{}, (), *]
included on the line. Prefix unformatted lines with: '-:' (no quote marks).
Example:
-:This signature contains no formatted spacing fields
Encodes to:
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