Class: Onelogin::Saml::Authrequest

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

Instance Method Summary collapse

Instance Method Details

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



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# File 'lib/onelogin/ruby-saml-bm/authrequest.rb', line 12

def create(settings, params = {})
  request_doc = create_authentication_xml_doc(settings)

  request = ""
  request_doc.write(request)

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

  deflated_request  = Zlib::Deflate.deflate(request, 9)[2..-5]
  base64_request    = Base64.encode64(deflated_request)
  encoded_request   = CGI.escape(base64_request)
  params_prefix     = (settings.idp_sso_target_url =~ /\?/) ? '&' : '?'
  request_params    = "#{params_prefix}SAMLRequest=#{encoded_request}"

  params.each_pair do |key, value|
    request_params << "&#{key}=#{CGI.escape(value.to_s)}"
  end

  settings.idp_sso_target_url + request_params
end

#create_authentication_xml_doc(settings) ⇒ Object 



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# File 'lib/onelogin/ruby-saml-bm/authrequest.rb', line 33

def create_authentication_xml_doc(settings)
  uuid = "_" + UUID.new.generate
  time = Time.now.utc.strftime("%Y-%m-%dT%H:%M:%SZ")
  # Create AuthnRequest root element using REXML 
  request_doc = REXML::Document.new

  root = request_doc.add_element "samlp:AuthnRequest", { "xmlns:samlp" => "urn:oasis:names:tc:SAML:2.0:protocol" }
  root.attributes['ID'] = uuid
  root.attributes['IssueInstant'] = time
  root.attributes['Version'] = "2.0"

  # 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", { "xmlns:saml" => "urn:oasis:names:tc:SAML:2.0:assertion" }
    issuer.text = settings.issuer
  end
  if settings.name_identifier_format != nil
    root.add_element "samlp:NameIDPolicy", { 
        "xmlns:samlp" => "urn:oasis:names:tc:SAML:2.0:protocol",
        # Might want to make AllowCreate a setting?
        "AllowCreate" => "true",
        "Format" => settings.name_identifier_format
    }
  end

  # BUG fix here -- if an authn_context is defined, add the tags with an "exact"
  # match required for authentication to succeed.  If this is not defined, 
  # the IdP will choose default rules for authentication.  (Shibboleth IdP)
  if settings.authn_context != nil
    requested_context = root.add_element "samlp:RequestedAuthnContext", { 
      "xmlns:samlp" => "urn:oasis:names:tc:SAML:2.0:protocol",
      "Comparison" => "exact",
    }
    class_ref = requested_context.add_element "saml:AuthnContextClassRef", { 
      "xmlns:saml" => "urn:oasis:names:tc:SAML:2.0:assertion",
    }
    class_ref.text = settings.authn_context
  end
  request_doc
end