This simple function converts LDAP Timestamp to Ruby DateTime object

ldap_timestamp2date.rb

# The MIT License (MIT)
#
# Copyright (c) 2016 Ricardo Giaviti
#
# Permission is hereby granted, free of charge, to any person obtaining a copy of this software 
# and associated documentation files (the "Software"), to deal in the Software without restriction, 
# including without limitation the rights to use, copy, modify, merge, publish, distribute, 
# sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is 
# furnished to do so, subject to the following conditions:
# 
# The above copyright notice and this permission notice shall be included in all copies or 
# substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, 
# INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR 
# PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE 
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#

require 'date'

# Ruby Docs for DateTime object: http://ruby-doc.org/stdlib-2.2.3/libdoc/date/rdoc/DateTime.html
#
# LDAP Timestamp uses this format: <year><month><day><hour><minutes><seconds>.<tz>
# So, we just slice the string in correct positions to match the fields.
def ldap_timestamp_converter(ad_timestamp)
  year  = ad_timestamp[0..3].to_i
  month  = ad_timestamp[4..5].to_i
  day  = ad_timestamp[6..7].to_i
  hours = ad_timestamp[8..9].to_i
  minutes =  ad_timestamp[10..11].to_i
  seconds = ad_timestamp[12..13].to_i
  timezone = '0'

  DateTime.new(year, month, day, hours, minutes, seconds, timezone)
end

# Testing
ad_timestamp = '20151110110950.0Z'
date = ldap_timestamp2date(ad_timestamp)
puts date