Topic: GPU brute forcing an encrypted wallet (Read 16576 times)

#!/usr/bin/ruby -w
class Cracker
  def initialize(char_array, password_range)
    @char_array = char_array
    @password_range = password_range
  end

  def password_correct?(phrase)
    print "basepassword" + phrase, "\t"
    system("./bitcoind walletpassphrase basepassword#{phrase} 20")
    case $?.exitstatus
    when 0
      puts "Found it!  basepassword#{phrase}"
      exit 0
    end
    return false
  end

  def generate_password( perm_number, password_length )
    password=""
    (1..password_length).each do |char_number| # loop through characters
      char_reference = (perm_number / @char_array.length**(char_number-1)).floor % @char_array.length
      character = @char_array[char_reference]
      password << character
    end
    password
  end

  def do_combination( num_combinations, password_length )
    (0..num_combinations-1).each do |perm_number| # loop through combinations for a given length
      password = generate_password( perm_number, password_length )
      return password, perm_number if password_correct?(password)
    end
  end

  def crack()
    (@password_range).each do |password_length|  # loop to gradually increase password length
      num_combinations=@char_array.length**password_length
      password, perm_number = do_combination(num_combinations, password_length)
      if password
        puts "#{password} | Access Granted | #{perm_number} / #{num_combinations}"
        return password
      end
    end
  end
end

# I removed characters I was sure I didn't use
characters = "!$@01235@ABCDEFGIKLMNOSTWYZabcdefgiklmnopqrstuwyz".split(//)

cracker = Cracker.new( characters, (6..8) )
password = cracker.crack()

puts "No luck."
exit 1