1# frozen_string_literal: true
 2
 3module Saml
 4  module Kit
 5    module Bindings
 6      # This class is responsible for
 7      # serializing/deserializing SAML
 8      # documents using the HTTP Post
 9      # binding specification.
10      # https://docs.oasis-open.org/security/saml/v2.0/saml-bindings-2.0-os.pdf
11      # {include:file:spec/saml/kit/bindings/http_post_spec.rb}
12      class HttpPost < Binding
13        include Serializable
14
15        def initialize(location:)
16          super(binding: Saml::Kit::Bindings::HTTP_POST, location: location)
17        end
18
19        def serialize(builder, relay_state: nil)
20          builder.destination = location
21          document = builder.build
22          xml = document.to_xml
23          saml_params = {
24            document.query_string_parameter => Base64.strict_encode64(xml),
25          }
26          saml_params['RelayState'] = relay_state if relay_state.present?
27          [location, saml_params]
28        end
29
30        def deserialize(params, configuration: Saml::Kit.configuration)
31          xml = decode(saml_param_from(params))
32          Saml::Kit::Document.to_saml_document(
33            xml,
34            configuration: configuration
35          )
36        end
37      end
38    end
39  end
40end