require 'rubygems'
require 'net/ldap'

def get_sid_string(data)
  sid = []
  sid << data[0].to_s

  rid = ""
  (6).downto(1) do |i|
    rid += byte2hex(data[i,1][0])
  end
  sid << rid.to_i.to_s

  sid += data.unpack("bbbbbbbbV*")[8..-1]
  "S-" + sid.join('-')
end

def byte2hex(b)
  ret = '%x' % (b.to_i & 0xff)
  ret = '0' + ret if ret.length < 2
  ret
end

ldap = Net::LDAP.new :host => "192.168.55.55",
    :port => 389,
    :auth => {
        :method => :simple,
        :username => "adam@foo.local",
        :password => "secret"
    }

filter = Net::LDAP::Filter.eq( "cn", "Adam*" )
treebase = "dc=foo,dc=local"

ldap.search( :base => treebase, :filter => filter ) do |entry|
  puts "DN: #{entry.dn}"
  entry.each do |attribute, values|
  next if attribute.to_s != "objectguid"
    puts "   #{attribute}:"
    values.each do |value|
      puts "      --->#{value.bytes}"
      puts "      --->#{value}"
    end
        puts "      --->#{get_sid_string(attribute.to_s)}"
  end
end