# encoding: UTF-8

LIB_DIR              = File.expand_path(File.join(__dir__, '..'))
ROOT_DIR             = File.expand_path(File.join(LIB_DIR, '..')) # expand_path is used to get "wpscan/" instead of "wpscan/lib/../"
DATA_DIR             = File.join(ROOT_DIR, 'data')
CONF_DIR             = File.join(ROOT_DIR, 'conf')
CACHE_DIR            = File.join(ENV['HOME'] + '/.local/share/wpscan/cache')
WPSCAN_LIB_DIR       = File.join(LIB_DIR, 'wpscan')
UPDATER_LIB_DIR      = File.join(LIB_DIR, 'updater')
COMMON_LIB_DIR       = File.join(LIB_DIR, 'common')
MODELS_LIB_DIR       = File.join(COMMON_LIB_DIR, 'models')
COLLECTIONS_LIB_DIR  = File.join(COMMON_LIB_DIR, 'collections')

DEFAULT_LOG_FILE     = File.join(ENV['HOME'] + '/.local/share/wpscan/log.txt')

# Plugins directories
COMMON_PLUGINS_DIR   = File.join(COMMON_LIB_DIR, 'plugins')
WPSCAN_PLUGINS_DIR   = File.join(WPSCAN_LIB_DIR, 'plugins') # Not used ATM

# Data files
WORDPRESSES_FILE  = File.join(DATA_DIR, 'wordpresses.json')
PLUGINS_FILE      = File.join(DATA_DIR, 'plugins.json')
THEMES_FILE       = File.join(DATA_DIR, 'themes.json')
WP_VERSIONS_FILE  = File.join(DATA_DIR, 'wp_versions.xml')
LOCAL_FILES_FILE  = File.join(DATA_DIR, 'local_vulnerable_files.xml')
WP_VERSIONS_XSD   = File.join(DATA_DIR, 'wp_versions.xsd')
LOCAL_FILES_XSD   = File.join(DATA_DIR, 'local_vulnerable_files.xsd')
USER_AGENTS_FILE  = File.join(DATA_DIR, 'user-agents.txt')
LAST_UPDATE_FILE  = File.join(DATA_DIR, '.last_update')

MIN_RUBY_VERSION = '2.1.9'

WPSCAN_VERSION = '2.9.3'

$LOAD_PATH.unshift(LIB_DIR)
$LOAD_PATH.unshift(WPSCAN_LIB_DIR)
$LOAD_PATH.unshift(MODELS_LIB_DIR)

def kali_linux?
  begin
    File.readlines('/etc/debian_version').grep(/^kali/i).any?
  rescue
    false
  end
end

# Determins if installed on Windows OS
def windows?
  Gem.win_platform?
end

require 'environment'

def escape_glob(s)
  s.gsub(/[\\\{\}\[\]\*\?]/) { |x| '\\' + x }
end

# TODO : add an exclude pattern ?
def require_files_from_directory(absolute_dir_path, files_pattern = '*.rb')
  files = Dir[File.join(escape_glob(absolute_dir_path), files_pattern)]

  # Files in the root dir are loaded first, then those in the subdirectories
  files.sort_by { |file| [file.count('/'), file] }.each do |f|
    f = File.expand_path(f)
    # puts "require #{f}" # Used for debug
    require f
  end
end

require_files_from_directory(COMMON_LIB_DIR, '**/*.rb')

# Add protocol
def add_http_protocol(url)
  url =~ /^https?:/ ? url : "http://#{url}"
end

def add_trailing_slash(url)
  url =~ /\/$/ ? url : "#{url}/"
end

def missing_db_file?
  DbUpdater::FILES.each do |db_file|
    return true unless File.exist?(File.join(DATA_DIR, db_file))
  end
  false
end

def last_update
  date = nil
  if File.exists?(LAST_UPDATE_FILE)
    content = File.read(LAST_UPDATE_FILE)
    date = Time.parse(content) rescue nil
  end
  date
end

def update_required?
  date = last_update
  day_seconds = 24 * 60 * 60
  five_days_ago = Time.now - (5 * day_seconds)
  (true if date.nil?) or (date < five_days_ago)
end

# Define colors
def colorize(text, color_code)
  if $COLORSWITCH
    "#{text}"
  else
    "\e[#{color_code}m#{text}\e[0m"
  end
end

def bold(text)
  colorize(text, 1)
end

def red(text)
  colorize(text, 31)
end

def green(text)
  colorize(text, 32)
end

def amber(text)
  colorize(text, 33)
end

def blue(text)
  colorize(text, 34)
end

def critical(text)
  $exit_code += 1 if defined?($exit_code) # hack for undefined var via rspec
  "#{red('[!]')} #{text}"
end

def warning(text)
  $exit_code += 1 if defined?($exit_code) # hack for undefined var via rspec
  "#{amber('[!]')} #{text}"
end

def info(text)
  "#{green('[+]')} #{text}"
end

def notice(text)
  "#{blue('[i]')} #{text}"
end

# our 1337 banner
def banner
  puts '_______________________________________________________________'
  puts '        __          _______   _____                  '
  puts '        \\ \\        / /  __ \\ / ____|                 '
  puts '         \\ \\  /\\  / /| |__) | (___   ___  __ _ _ __ ®'
  puts '          \\ \\/  \\/ / |  ___/ \\___ \\ / __|/ _` | \'_ \\ '
  puts '           \\  /\\  /  | |     ____) | (__| (_| | | | |'
  puts '            \\/  \\/   |_|    |_____/ \\___|\\__,_|_| |_|'
  puts
  puts '        WordPress Security Scanner by the WPScan Team '
  puts "                       Version #{WPSCAN_VERSION}"
  puts '          Sponsored by Sucuri - https://sucuri.net'
  puts '   @_WPScan_, @ethicalhack3r, @erwan_lr, pvdl, @_FireFart_'
  puts '_______________________________________________________________'
  puts
end

def xml(file)
  Nokogiri::XML(File.open(file)) do |config|
    config.noblanks
  end
end

def json(file)
  content = File.open(file).read

  begin
    JSON.parse(content)
  rescue => e
    puts "[ERROR] In JSON file parsing #{file} #{e}"
    raise
  end
end

def redefine_constant(constant, value)
  Object.send(:remove_const, constant)
  Object.const_set(constant, value)
end

# Gets the string all elements in stringarray ends with
def get_equal_string_end(stringarray = [''])
  already_found = ''
  looping = true
  counter = -1
  # remove nils (# Issue #232)
  stringarray = stringarray.compact
  if stringarray.kind_of? Array and stringarray.length > 1
    base = stringarray.first
    while looping
      character = base[counter, 1]
      stringarray.each do |s|
        if s[counter, 1] != character
          looping = false
          break
        end
      end
      if looping == false or (counter * -1) > base.length
        break
      end
      already_found = "#{character if character}#{already_found}"
      counter -= 1
    end
  end
  already_found
end

def remove_base64_images_from_html(html)
  # remove data:image/png;base64, images
  base64regex = %r{(?:[A-Za-z0-9+/]{4})*(?:[A-Za-z0-9+/]{2}==|[A-Za-z0-9+/]{3}=)?}
  imageregex = %r{data\s*:\s*image/[^\s;]+\s*;\s*base64\s*,\s*}
  html.gsub(/["']\s*#{imageregex}#{base64regex}\s*["']/, '""')
end

# @return [ Integer ] The memory of the current process in Bytes
def get_memory_usage
  `ps -o rss= -p #{Process.pid}`.to_i * 1024 # ps returns the value in KB
end

# Use the wc system command to count the number of lines in the file
# instead of using File.open which will use to much memory for large file (10 times the size of the file)
#
# @return [ Integer ] The number of lines in the given file
def count_file_lines(file)
  if windows?
    `findstr /R /N "^" #{file.shellescape} | find /C ":"`.split[0].to_i
  else
    `wc -l #{file.shellescape}`.split[0].to_i
  end
end

# Truncates a string to a specific length and adds ... at the end
def truncate(input, size, trailing = '...')
  size = size.to_i
  trailing ||= ''
  return input if input.nil? or size <= 0 or input.length <= size or
      trailing.length >= input.length or size-trailing.length-1 >= input.length
  return "#{input[0..size-trailing.length-1]}#{trailing}"
end

# Gets a random User-Agent
#
# @return [ String ] A random user-agent from data/user-agents.txt
def get_random_user_agent
  user_agents = []
  f = File.open(USER_AGENTS_FILE, 'r')
  f.each_line do |line|
    # ignore comments
    next if line.empty? or line =~ /^\s*(#|\/\/)/
    user_agents << line.strip
  end
  f.close
  # return ransom user-agent
  user_agents.sample
end

# Directory listing enabled on url?
#
# @return [ Boolean ]
def directory_listing_enabled?(url)
  Browser.get(url.to_s).body[%r{<title>Index of}] ? true : false
end

def url_encode(str)
  CGI.escape(str).gsub("+", "%20")
end
