142 lines
4 KiB
Ruby
142 lines
4 KiB
Ruby
# frozen_string_literal: true
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module Gitlab
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module Auth
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module LDAP
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class Adapter
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SEARCH_RETRY_FACTOR = [1, 1, 2, 3].freeze
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MAX_SEARCH_RETRIES = Rails.env.test? ? 1 : SEARCH_RETRY_FACTOR.size.freeze
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attr_reader :provider, :ldap
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def self.open(provider, &block)
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Net::LDAP.open(config(provider).adapter_options) do |ldap|
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block.call(self.new(provider, ldap))
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end
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end
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def self.config(provider)
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Gitlab::Auth::LDAP::Config.new(provider)
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end
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def initialize(provider, ldap = nil)
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@provider = provider
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@ldap = ldap || renew_connection_adapter
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end
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def config
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Gitlab::Auth::LDAP::Config.new(provider)
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end
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def users(fields, value, limit = nil)
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options = user_options(Array(fields), value, limit)
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users_search(options)
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end
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def user(*args)
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users(*args).first
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end
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def dn_matches_filter?(dn, filter)
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ldap_search(base: dn,
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filter: filter,
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scope: Net::LDAP::SearchScope_BaseObject,
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attributes: %w{dn}).any?
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end
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def ldap_search(*args)
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retries ||= 0
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# Net::LDAP's `time` argument doesn't work. Use Ruby `Timeout` instead.
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Timeout.timeout(timeout_time(retries)) do
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results = ldap.search(*args)
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if results.nil?
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response = ldap.get_operation_result
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unless response.code.zero?
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Rails.logger.warn("LDAP search error: #{response.message}") # rubocop:disable Gitlab/RailsLogger
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end
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[]
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else
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results
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end
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end
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rescue Net::LDAP::Error, Timeout::Error => error
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retries += 1
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error_message = connection_error_message(error)
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Rails.logger.warn(error_message) # rubocop:disable Gitlab/RailsLogger
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if retries < MAX_SEARCH_RETRIES
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renew_connection_adapter
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retry
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else
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raise LDAPConnectionError, error_message
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end
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end
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private
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def timeout_time(retry_number)
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SEARCH_RETRY_FACTOR[retry_number] * config.timeout
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end
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def users_search(options)
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entries = ldap_search(options).select do |entry|
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entry.respond_to? config.uid
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end
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entries.map do |entry|
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Gitlab::Auth::LDAP::Person.new(entry, provider)
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end
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end
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def user_options(fields, value, limit)
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options = {
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attributes: Gitlab::Auth::LDAP::Person.ldap_attributes(config),
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base: config.base
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}
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options[:size] = limit if limit
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if fields.include?('dn')
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raise ArgumentError, 'It is not currently possible to search the DN and other fields at the same time.' if fields.size > 1
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options[:base] = value
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options[:scope] = Net::LDAP::SearchScope_BaseObject
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else
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filter = fields.map { |field| Net::LDAP::Filter.eq(field, value) }.inject(:|)
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end
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options.merge(filter: user_filter(filter))
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end
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def user_filter(filter = nil)
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user_filter = config.constructed_user_filter if config.user_filter.present?
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if user_filter && filter
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Net::LDAP::Filter.join(filter, user_filter)
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elsif user_filter
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user_filter
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else
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filter
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end
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end
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def connection_error_message(exception)
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if exception.is_a?(Timeout::Error)
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"LDAP search timed out after #{config.timeout} seconds"
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else
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"LDAP search raised exception #{exception.class}: #{exception.message}"
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end
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end
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def renew_connection_adapter
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@ldap = Net::LDAP.new(config.adapter_options)
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end
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end
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end
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end
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end
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