Rails LDAP login using net/ldap - ruby-on-rails

Question

I am trying to get LDAP authentication to work under Rails.
I have chosen net/ldap since it's a native Ruby LDAP library.
I have tried all possible stuff, specially examples from http://net-ldap.rubyforge.org/classes/Net/LDAP.html but still unable to get it work.
Any ideas?

Answer 1

The best solution I managed to reach is a Model with the following:
require 'net/ldap'
class User < ActiveRecord::Base
def after_initialize
#config = YAML.load(ERB.new(File.read("#{Rails.root}/config/ldap.yml")).result)[Rails.env]
end
def ldap_auth(user, pass)
ldap = initialize_ldap_con
result = ldap.bind_as(
:base => #config['base_dn'],
:filter => "(#{#config['attributes']['id']}=#{user})",
:password => pass
)
if result
# fetch user DN
get_user_dn user
sync_ldap_with_db user
end
nil
end
private
def initialize_ldap_con
options = { :host => #config['host'],
:port => #config['port'],
:encryption => (#config['tls'] ? :simple_tls : nil),
:auth => {
:method => :simple,
:username => #config['ldap_user'],
:password => #config['ldap_password']
}
}
Net::LDAP.new options
end
def get_user_dn(user)
ldap = initialize_ldap_con
login_filter = Net::LDAP::Filter.eq #config['attributes']['id'], "#{user}"
object_filter = Net::LDAP::Filter.eq "objectClass", "*"
ldap.search :base => #config['base_dn'],
:filter => object_filter & login_filter,
:attributes => ['dn', #config['attributes']['first_name'], #config['attributes']['last_name'], #config['attributes']['mail']] do |entry|
logger.debug "DN: #{entry.dn}"
entry.each do |attr, values|
values.each do |value|
logger.debug "#{attr} = #{value}"
end
end
end
end
end

Answer 2

I work on a Devise plugin for Rails 3 that uses LDAP for authentication, you can look at the source to get some ideas, it currently uses net-ldap 0.1.1:
http://github.com/cschiewek/devise_ldap_authenticatable
The actual connecting and authenticating to the LDAP sever is done at:
http://github.com/cschiewek/devise_ldap_authenticatable/blob/master/lib/devise_ldap_authenticatable/ldap_adapter.rb
Lastly, you can look at the sample LDAP server config and Rails 3 app I use to run the tests against:
App: http://github.com/cschiewek/devise_ldap_authenticatable/tree/master/test/rails_app/
Server: http://github.com/cschiewek/devise_ldap_authenticatable/tree/master/test/ldap/