Class: OneLogin::RubySaml::Authrequest

Inherits:
SamlMessage show all
Defined in:
lib/onelogin/ruby-saml/authrequest.rb

Overview

SAML2 Authentication. AuthNRequest (SSO SP initiated, Builder)

Constant Summary

Constants inherited from SamlMessage

SamlMessage::ASSERTION, SamlMessage::BASE64_FORMAT, SamlMessage::PROTOCOL

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods inherited from SamlMessage

#id, schema, #valid_saml?, #version

Constructor Details

#initialize ⇒ Authrequest

Initializes the AuthNRequest. An Authrequest Object that is an extension of the SamlMessage class. Asigns an ID, a random uuid.



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# File 'lib/onelogin/ruby-saml/authrequest.rb', line 22

def initialize
  @uuid = OneLogin::RubySaml::Utils.uuid
end

Instance Attribute Details

#uuid ⇒ Object (readonly)

AuthNRequest ID



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# File 'lib/onelogin/ruby-saml/authrequest.rb', line 17

def uuid
  @uuid
end

Instance Method Details

#create(settings, params = {}) ⇒ String

Creates the AuthNRequest string.

Parameters:

  • settings (OneLogin::RubySaml::Settings|nil) —

    Toolkit settings

  • params (Hash) (defaults to: {}) —

    Some extra parameters to be added in the GET for example the RelayState

Returns:

  • (String) —

    AuthNRequest string that includes the SAMLRequest



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# File 'lib/onelogin/ruby-saml/authrequest.rb', line 31

def create(settings, params = {})
  params = create_params(settings, params)
  params_prefix = (settings.idp_sso_target_url =~ /\?/) ? '&' : '?'
  saml_request = CGI.escape(params.delete("SAMLRequest"))
  request_params = "#{params_prefix}SAMLRequest=#{saml_request}"
  params.each_pair do |key, value|
    request_params << "&#{key.to_s}=#{CGI.escape(value.to_s)}"
  end
  raise "Invalid settings, idp_sso_target_url is not set!" if settings.idp_sso_target_url.nil?
  @login_url = settings.idp_sso_target_url + request_params
end

#create_authentication_xml_doc(settings) ⇒ String

Creates the SAMLRequest String.

Parameters:

Returns:

  • (String) —

    The SAMLRequest String.



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# File 'lib/onelogin/ruby-saml/authrequest.rb', line 95

def create_authentication_xml_doc(settings)
  document = create_xml_document(settings)
  sign_document(document, settings)
end

#create_params(settings, params = {}) ⇒ Hash

Creates the Get parameters for the request.

Parameters:

  • settings (OneLogin::RubySaml::Settings|nil) —

    Toolkit settings

  • params (Hash) (defaults to: {}) —

    Some extra parameters to be added in the GET for example the RelayState

Returns:

  • (Hash) —

    Parameters



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# File 'lib/onelogin/ruby-saml/authrequest.rb', line 48

def create_params(settings, params={})
  # The method expects :RelayState but sometimes we get 'RelayState' instead.
  # Based on the HashWithIndifferentAccess value in Rails we could experience
  # conflicts so this line will solve them.
  relay_state = params[:RelayState] || params['RelayState']

  if relay_state.nil?
    params.delete(:RelayState)
    params.delete('RelayState')
  end

  request_doc = create_authentication_xml_doc(settings)
  request_doc.context[:attribute_quote] = :quote if settings.double_quote_xml_attribute_values

  request = ""
  request_doc.write(request)

  Logging.debug "Created AuthnRequest: #{request}"

  request = deflate(request) if settings.compress_request
  base64_request = encode(request)
  request_params = {"SAMLRequest" => base64_request}

  if settings.security[:authn_requests_signed] && !settings.security[:embed_sign] && settings.private_key
    params['SigAlg']    = settings.security[:signature_method]
    url_string = OneLogin::RubySaml::Utils.build_query(
      :type => 'SAMLRequest',
      :data => base64_request,
      :relay_state => relay_state,
      :sig_alg => params['SigAlg']
    )
    sign_algorithm = XMLSecurity::BaseDocument.new.algorithm(settings.security[:signature_method])
    signature = settings.get_sp_key.sign(sign_algorithm.new, url_string)
    params['Signature'] = encode(signature)
  end

  params.each_pair do |key, value|
    request_params[key] = value.to_s
  end

  request_params
end

#create_xml_document(settings) ⇒ Object 



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# File 'lib/onelogin/ruby-saml/authrequest.rb', line 100

def create_xml_document(settings)
  time = Time.now.utc.strftime("%Y-%m-%dT%H:%M:%SZ")

  request_doc = XMLSecurity::Document.new
  request_doc.uuid = uuid

  root = request_doc.add_element "samlp:AuthnRequest", { "xmlns:samlp" => "urn:oasis:names:tc:SAML:2.0:protocol", "xmlns:saml" => "urn:oasis:names:tc:SAML:2.0:assertion" }
  root.attributes['ID'] = uuid
  root.attributes['IssueInstant'] = time
  root.attributes['Version'] = "2.0"
  root.attributes['Destination'] = settings.idp_sso_target_url unless settings.idp_sso_target_url.nil?
  root.attributes['IsPassive'] = settings.passive unless settings.passive.nil?
  root.attributes['ProtocolBinding'] = settings.protocol_binding unless settings.protocol_binding.nil?
  root.attributes["AttributeConsumingServiceIndex"] = settings.attributes_index unless settings.attributes_index.nil?
  root.attributes['ForceAuthn'] = settings.force_authn unless settings.force_authn.nil?

  # Conditionally defined elements based on settings
  if settings.assertion_consumer_service_url != nil
    root.attributes["AssertionConsumerServiceURL"] = settings.assertion_consumer_service_url
  end
  if settings.issuer != nil
    issuer = root.add_element "saml:Issuer"
    issuer.text = settings.issuer
  end

  if settings.name_identifier_value_requested != nil
    subject = root.add_element "saml:Subject"

    nameid = subject.add_element "saml:NameID"
    nameid.attributes['Format'] = settings.name_identifier_format if settings.name_identifier_format
    nameid.text = settings.name_identifier_value_requested

    subject_confirmation = subject.add_element "saml:SubjectConfirmation"
    subject_confirmation.attributes['Method'] = "urn:oasis:names:tc:SAML:2.0:cm:bearer"
  end

  if settings.name_identifier_format != nil
    root.add_element "samlp:NameIDPolicy", {
        # Might want to make AllowCreate a setting?
        "AllowCreate" => "true",
        "Format" => settings.name_identifier_format
    }
  end

  if settings.authn_context || settings.authn_context_decl_ref

    if settings.authn_context_comparison != nil
      comparison = settings.authn_context_comparison
    else
      comparison = 'exact'
    end

    requested_context = root.add_element "samlp:RequestedAuthnContext", {
      "Comparison" => comparison,
    }

    if settings.authn_context != nil
      authn_contexts_class_ref = settings.authn_context.is_a?(Array) ? settings.authn_context : [settings.authn_context]
      authn_contexts_class_ref.each do |authn_context_class_ref|
        class_ref = requested_context.add_element "saml:AuthnContextClassRef"
        class_ref.text = authn_context_class_ref
      end
    end

    if settings.authn_context_decl_ref != nil
      authn_contexts_decl_refs = settings.authn_context_decl_ref.is_a?(Array) ? settings.authn_context_decl_ref : [settings.authn_context_decl_ref]
      authn_contexts_decl_refs.each do |authn_context_decl_ref|
        decl_ref = requested_context.add_element "saml:AuthnContextDeclRef"
        decl_ref.text = authn_context_decl_ref
      end
    end
  end

  request_doc
end

#sign_document(document, settings) ⇒ Object 



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# File 'lib/onelogin/ruby-saml/authrequest.rb', line 176

def sign_document(document, settings)
  # embed signature
  if settings.security[:authn_requests_signed] && settings.private_key && settings.certificate && settings.security[:embed_sign]
    private_key = settings.get_sp_key
    cert = settings.get_sp_cert
    document.sign_document(private_key, cert, settings.security[:signature_method], settings.security[:digest_method])
  end

  document
end