keep text files hidden from your family (not encryption! only secure against non programmer people)

build_file_locker.rb

## locker builder ver 1.0, thomasjslone 2024-11-24
## Instructions:
##
##  Locker is intended for use on windows, with ruby properly installed allowing you to double click the script to run it.
##  Locker is NOT encryption and will not stop experienced programmers from decoding your information.
##  Locker is intended to obfascate your files from people who have access to your computer.
##
##  To begin, run this file('build.rb')
##  You will be asked to select a directory and enter a file name.
##  The ruby script generated can be stored with or away from the target file you want to protect, the locker can also have a set password.
##
##  When you run the locker it will turn the target file into an unreadable mess of numbers, this will prevent your average person from reading them
##  until you unlock them by running the same locker file again.
##
##  One last time, THIS IS NOT ENCRYPTION and is not safe from any one with intermediate programming skills.
##
##  Encoding scheme: Files must be utf8 ascii characters, those characters are translated into their ordinal values(0-255) and the result is a massive number which is then multiplied by 3
##  to remove recognizable patterns. The source code of the locker file its self is also encoded and only decoded at the end of the file, **and also contains obfascation**comming to v1.1.
##  These measures will stop basic scripters and computer literate people with no actual programming skills.

@chars = [] ; c = 0 ; 256.times{ @chars << c.chr.to_s ; c += 1 }
def exit_msg(str) ;  puts str.to_s ;  sleep 5.0 ;  exit ;  end

puts "Would you like to build a locker? (Y/N)"
if gets.chomp[0].downcase != "y" ;  exit ;  end

puts "Enter the directory the file will be located or just press enter if the locker will be in the same directory as the file."
print "Directory: "
inp = gets.chomp
if inp.to_s == "" ;  @dir = nil
elsif File.directory?(inp) ;  @dir = inp
else ;  exit_msg("No such directory: " + inp.to_s)
end

puts "Enter the name of the file including extension."
print "File: "
inp = gets.chomp
if inp.to_s == "" ;  exit_msg("File name cannot be blank.")
else
  @name = inp.to_s
end

puts "Would you like to set a password for the locker? (Y/N)"
if gets.chomp[0].downcase == "y"
  @require_password = true
  loop do
    print "Password: "
    @password = gets.chomp
	puts "Use this password? (Y/N)"
	if gets.chomp[0].downcase == "y" ;  break ;  end
  end
  p = []
  @password.split('').each{ |ch| 
	n = @chars.index(ch).to_s
    loop do ;  if n.to_s.length < 3;  n="0"+n ;  else;  break ;  end ;  end
    p << n
  }	
  @password = p.join('')
else
  @require_password = false
end

##build script
@data = []

if @dir == nil
  @data << "@dir = Dir.getwd"
else
  @data << "@dir = " + @dir.to_s
end

@script = []

@data << '@name = __FILE__.split("/")[-1].split(".rb")[0].to_s'
@data << '@path = @dir + "/" + @name'
#@data << '@chars = [] ; c = 0 ; 256.times{ @chars << c.chr.to_s ; c += 1 }'
@data << '@data = "" ;  @ndata = ""'
@data << 'def exit_msg(str) ;  puts str.to_s ;  sleep 5.0 ;  exit ;  end'

if @require_password == true
  @data << 'print "Password: " ;  @string = "" ;  gets.chomp.split("").each do |c| ; c = c.ord.to_s ;  loop do ;  if c.length == 3 ;  break ;  end ;  c = "0"+c ;  end ;  @string << c ;  end'
  @data << 'if @string.to_s != "' + @password.to_s + '"' + ' ;  exit ;  end'
end

@data << 'if File.file?(@path) == false ;  exit_msg("File doesnt exist: "+@name) ;  end'
@data << 'begin ;  f = File.open(@path,"r") ;  @data = f.read ;  f.close ;  rescue ;  exit_msg("Failed to read file.") ;  end'
@data << 'if @data.length == 0 ;  exit_msg("File is empty, please write file name with extension on the first line.") ;  end'
@data << 'if @data.to_s.downcase[0..8] == @name.to_s ;  begin ;  str=@data;  numbers=[] ;  str.split("").each{ |ch| ;  n = @chars.index(ch).to_s ;  loop do ;  if n.to_s.length < 3;  n="0"+n ;  else;  break ;  end ;  end ;  numbers << n ;  } ;  @ndata = numbers.join("") ;  @ndata = "1" + @ndata ;  @ndata = @ndata.to_i ;  @ndata = @ndata * 3 ;  @ndata = @ndata.to_i ;  rescue ;  exit_msg("Failed to encode file data.") ;  end  ;  begin ;  f = File.open(@path,"w") ;  f.write(@ndata) ;  f.close ;  puts "EN-CODED" ; sleep 0.5 ;  exit ;  rescue ;  exit_msg("Failed to write encoded data to file.") ;  end ;  end'
@data << 'begin ;  @data = @data.to_i ;  @data = @data / 3 ;  @data = @data.to_s[1..-1] ;  chars=[] ;  [email protected]("") ;  loop do ;  if str.length == 0;  break;  end ;  chars<<@chars[str[0..2].join("").to_i] ;  3.times{ str.delete_at(0) } ;  end ;  @ndata = chars.join("") ;  rescue ;  exit_msg("Failed to decode file data.") ;  end ;  begin ;  f = File.open(@path,"w") ;  f.write(@ndata) ;  f.close ;  puts "DE-CODED" ;  sleep 0.5 ;  exit ;  rescue ;  exit_msg("Failed to write encoded data to file.") ;  end'

@data = @data.join(";")


numbers=[]
@data.split('').each{ |ch| 
  n = @chars.index(ch).to_s
  loop do
    if n.to_s.length < 3;  n="0"+n
	else;  break
	end
  end
  numbers << n
}
@data = numbers.join('') 

@script << '@payload="'+@data+'"'
@script << '@chars = [] ; c = 0 ; (0..255).each { |c| ; @chars << c.chr.to_s }'
@script << 'chars=[];[email protected]("") ;  loop do ;  if str.length == 0;  break;  end ;  chars<<@chars[str[0..2].join("").to_i] ;  3.times{ str.delete_at(0) };  end;  instance_eval(chars.join(""))'

@script = @script.join(";")

f = File.open(Dir.getwd + "/" + @name.to_s + ".rb", "w")
f.write(@script)
f.close