XOR tool

xor.rb

puts "XOR tool"

hexvals = Array.new

puts "Enter first value in hex: "
hexvals << gets.chomp
puts "Enter second value in hex: "
hexvals << gets.chomp

vals = Array.new

hexvals.each do |hexval|
  vals << [hexval].pack("H*")
end

val1 = vals[0]
val2 = vals[1]

puts "Answer: "

val1.bytes.each_with_index do |b1, i|
  b2 = val2.bytes.to_a[i]
  b2 = b2.nil? ? 0 : b2
  answer =  b1 ^ b2
  ansstring = answer.to_s(16)
  if ansstring.length == 1
    print "0"
  end
  print ansstring
end
print "\n"