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# Redmine - project management software
# Copyright (C) 2006-2012 Jean-Philippe Lang
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
require 'iconv'
require 'net/ldap'
require 'net/ldap/dn'
require 'timeout'
class AuthSourceLdap < AuthSource
validates_presence_of :host, :port, :attr_login
validates_length_of :name, :host, :maximum => 60, :allow_nil => true
validates_length_of :account, :account_password, :base_dn, :filter, :maximum => 255, :allow_blank => true
validates_length_of :attr_login, :attr_firstname, :attr_lastname, :attr_mail, :maximum => 30, :allow_nil => true
validates_numericality_of :port, :only_integer => true
validates_numericality_of :timeout, :only_integer => true, :allow_blank => true
validate :validate_filter
before_validation :strip_ldap_attributes
def initialize(attributes=nil, *args)
super
self.port = 389 if self.port == 0
end
def authenticate(login, password)
return nil if login.blank? || password.blank?
with_timeout do
attrs = get_user_dn(login, password)
if attrs && attrs[:dn] && authenticate_dn(attrs[:dn], password)
logger.debug "Authentication successful for '#{login}'" if logger && logger.debug?
return attrs.except(:dn)
end
end
rescue Net::LDAP::LdapError => e
raise AuthSourceException.new(e.message)
end
# test the connection to the LDAP
def test_connection
with_timeout do
ldap_con = initialize_ldap_con(self.account, self.account_password)
ldap_con.open { }
end
rescue Net::LDAP::LdapError => e
raise AuthSourceException.new(e.message)
end
def auth_method_name
"LDAP"
end
# Returns true if this source can be searched for users
def searchable?
!account.to_s.include?("$login") && %w(login firstname lastname mail).all? {|a| send("attr_#{a}?")}
end
# Searches the source for users and returns an array of results
def search(q)
q = q.to_s.strip
return [] unless searchable? && q.present?
results = []
search_filter = base_filter & Net::LDAP::Filter.begins(self.attr_login, q)
ldap_con = initialize_ldap_con(self.account, self.account_password)
ldap_con.search(:base => self.base_dn,
:filter => search_filter,
:attributes => ['dn', self.attr_login, self.attr_firstname, self.attr_lastname, self.attr_mail],
:size => 10) do |entry|
attrs = get_user_attributes_from_ldap_entry(entry)
attrs[:login] = AuthSourceLdap.get_attr(entry, self.attr_login)
results << attrs
end
results
rescue Net::LDAP::LdapError => e
raise AuthSourceException.new(e.message)
end
private
def with_timeout(&block)
timeout = self.timeout
timeout = 20 unless timeout && timeout > 0
Timeout.timeout(timeout) do
return yield
end
rescue Timeout::Error => e
raise AuthSourceTimeoutException.new(e.message)
end
def ldap_filter
if filter.present?
Net::LDAP::Filter.construct(filter)
end
rescue Net::LDAP::LdapError
nil
end
def base_filter
filter = Net::LDAP::Filter.eq("objectClass", "*")
if f = ldap_filter
filter = filter & f
end
filter
end
def validate_filter
if filter.present? && ldap_filter.nil?
errors.add(:filter, :invalid)
end
end
def strip_ldap_attributes
[:attr_login, :attr_firstname, :attr_lastname, :attr_mail].each do |attr|
write_attribute(attr, read_attribute(attr).strip) unless read_attribute(attr).nil?
end
end
def initialize_ldap_con(ldap_user, ldap_password)
options = { :host => self.host,
:port => self.port,
:encryption => (self.tls ? :simple_tls : nil)
}
options.merge!(:auth => { :method => :simple, :username => ldap_user, :password => ldap_password }) unless ldap_user.blank? && ldap_password.blank?
Net::LDAP.new options
end
def get_user_attributes_from_ldap_entry(entry)
{
:dn => entry.dn,
:firstname => AuthSourceLdap.get_attr(entry, self.attr_firstname),
:lastname => AuthSourceLdap.get_attr(entry, self.attr_lastname),
:mail => AuthSourceLdap.get_attr(entry, self.attr_mail),
:auth_source_id => self.id
}
end
# Return the attributes needed for the LDAP search. It will only
# include the user attributes if on-the-fly registration is enabled
def search_attributes
if onthefly_register?
['dn', self.attr_firstname, self.attr_lastname, self.attr_mail]
else
['dn']
end
end
# Check if a DN (user record) authenticates with the password
def authenticate_dn(dn, password)
if dn.present? && password.present?
initialize_ldap_con(dn, password).bind
end
end
# Get the user's dn and any attributes for them, given their login
def get_user_dn(login, password)
ldap_con = nil
if self.account && self.account.include?("$login")
ldap_con = initialize_ldap_con(self.account.sub("$login", Net::LDAP::DN.escape(login)), password)
else
ldap_con = initialize_ldap_con(self.account, self.account_password)
end
attrs = {}
search_filter = base_filter & Net::LDAP::Filter.eq(self.attr_login, login)
ldap_con.search( :base => self.base_dn,
:filter => search_filter,
:attributes=> search_attributes) do |entry|
if onthefly_register?
attrs = get_user_attributes_from_ldap_entry(entry)
else
attrs = {:dn => entry.dn}
end
logger.debug "DN found for #{login}: #{attrs[:dn]}" if logger && logger.debug?
end
attrs
end
def self.get_attr(entry, attr_name)
if !attr_name.blank?
entry[attr_name].is_a?(Array) ? entry[attr_name].first : entry[attr_name]
end
end
end
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