Class: OneLogin::RubySaml::Metadata

Inherits:
Object
  • Object
show all
Defined in:
lib/onelogin/ruby-saml/metadata.rb

Overview

SAML2 Metadata. XML Metadata Builder

Instance Method Summary collapse

Instance Method Details

#generate(settings, pretty_print = false) ⇒ String

Return SP metadata based on the settings.


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# File 'lib/onelogin/ruby-saml/metadata.rb', line 20

def generate(settings, pretty_print=false)
  meta_doc = XMLSecurity::Document.new
  namespaces = {
      "xmlns:md" => "urn:oasis:names:tc:SAML:2.0:metadata"
  }
  if settings.attribute_consuming_service.configured?
    namespaces["xmlns:saml"] = "urn:oasis:names:tc:SAML:2.0:assertion"
  end
  root = meta_doc.add_element "md:EntityDescriptor", namespaces
  sp_sso = root.add_element "md:SPSSODescriptor", {
      "protocolSupportEnumeration" => "urn:oasis:names:tc:SAML:2.0:protocol",
      "AuthnRequestsSigned" => settings.security[:authn_requests_signed],
      "WantAssertionsSigned" => settings.security[:want_assertions_signed],
  }

  # Add KeyDescriptor if messages will be signed / encrypted
  # with SP certificate, and new SP certificate if any
  cert = settings.get_sp_cert
  cert_new = settings.get_sp_cert_new

  for sp_cert in [cert, cert_new]
    if sp_cert
      cert_text = Base64.encode64(sp_cert.to_der).gsub("\n", '')
      kd = sp_sso.add_element "md:KeyDescriptor", { "use" => "signing" }
      ki = kd.add_element "ds:KeyInfo", {"xmlns:ds" => "http://www.w3.org/2000/09/xmldsig#"}
      xd = ki.add_element "ds:X509Data"
      xc = xd.add_element "ds:X509Certificate"
      xc.text = cert_text

      if settings.security[:want_assertions_encrypted]
        kd2 = sp_sso.add_element "md:KeyDescriptor", { "use" => "encryption" }
        ki2 = kd2.add_element "ds:KeyInfo", {"xmlns:ds" => "http://www.w3.org/2000/09/xmldsig#"}
        xd2 = ki2.add_element "ds:X509Data"
        xc2 = xd2.add_element "ds:X509Certificate"
        xc2.text = cert_text
      end
    end
  end

  root.attributes["ID"] = OneLogin::RubySaml::Utils.uuid
  if settings.issuer
    root.attributes["entityID"] = settings.issuer
  end
  if settings.single_logout_service_url
    sp_sso.add_element "md:SingleLogoutService", {
        "Binding" => settings.single_logout_service_binding,
        "Location" => settings.single_logout_service_url,
        "ResponseLocation" => settings.single_logout_service_url
    }
  end
  if settings.name_identifier_format
    nameid = sp_sso.add_element "md:NameIDFormat"
    nameid.text = settings.name_identifier_format
  end
  if settings.assertion_consumer_service_url
    sp_sso.add_element "md:AssertionConsumerService", {
        "Binding" => settings.assertion_consumer_service_binding,
        "Location" => settings.assertion_consumer_service_url,
        "isDefault" => true,
        "index" => 0
    }
  end

  if settings.attribute_consuming_service.configured?
    sp_acs = sp_sso.add_element "md:AttributeConsumingService", {
      "isDefault" => "true",
      "index" => settings.attribute_consuming_service.index
    }
    srv_name = sp_acs.add_element "md:ServiceName", {
      "xml:lang" => "en"
    }
    srv_name.text = settings.attribute_consuming_service.name
    settings.attribute_consuming_service.attributes.each do |attribute|
      sp_req_attr = sp_acs.add_element "md:RequestedAttribute", {
        "NameFormat" => attribute[:name_format],
        "Name" => attribute[:name],
        "FriendlyName" => attribute[:friendly_name],
        "isRequired" => attribute[:is_required] || false
      }
      unless attribute[:attribute_value].nil?
        Array(attribute[:attribute_value]).each do |value|
          sp_attr_val = sp_req_attr.add_element "saml:AttributeValue"
          sp_attr_val.text = value.to_s
        end
      end
    end
  end

  # With OpenSSO, it might be required to also include
  #  <md:RoleDescriptor xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:query="urn:oasis:names:tc:SAML:metadata:ext:query" xsi:type="query:AttributeQueryDescriptorType" protocolSupportEnumeration="urn:oasis:names:tc:SAML:2.0:protocol"/>
  #  <md:XACMLAuthzDecisionQueryDescriptor WantAssertionsSigned="false" protocolSupportEnumeration="urn:oasis:names:tc:SAML:2.0:protocol"/>

  meta_doc << REXML::XMLDecl.new("1.0", "UTF-8")

  # embed signature
  if settings.security[:metadata_signed] && settings.private_key && settings.certificate
    private_key = settings.get_sp_key
    meta_doc.sign_document(private_key, cert, settings.security[:signature_method], settings.security[:digest_method])
  end

  ret = ""
  # pretty print the XML so IdP administrators can easily see what the SP supports
  if pretty_print
    meta_doc.write(ret, 1)
  else
    ret = meta_doc.to_s
  end

  return ret
end