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@pagopa/io-spid-commons

v13.5.1

Published

Common code for integrating SPID authentication

Downloads

198

Readme

io-spid-commons

This repo contains:

  • a passport-strategy that implements SPID authentication
  • a method that configures an express endpoint to serve Service Provider metadata
  • a scheduled procedure that refreshes IDP metadata from the SPID registry
  • a redis cache provider to validate SAML InResponseTo field

You may use this package if you're going to implement a SPID Service Provider with a NodeJS express server.

Upgrading passport-saml

Beware that any changes to the method signatures of SAML.prototype.generateAuthorizeRequest and SAML.prototype.validatePostResponse must be reflected inside the CustomSamlClient class.

That's why the version of passport-saml in package.json is currently fixed at 1.3.5.

Store Additional data between login and acs steps

If you need to pass additional parameters from login request to acs callback, you can use built-in additional parameter management, by adding a new extraLoginRequestParamConfig block in configuration:


export type ExtraParamsT = t.TypeOf<typeof ExtraParams>;
export const ExtraParams = t.type({ test: t.string });

const appConfig: IApplicationConfig<ExtraParamsT> = {

  extraLoginRequestParamConfig: {
    codec: ExtraParams,
    requestMapper: (req) =>  
                    ExtraParams.decode({
                                        loginType: req.header("x-test-header"),
                                      })
  },

  assertionConsumerServicePath: "/acs",
  clientErrorRedirectionUrl: "/error",
  clientLoginRedirectionUrl: "/success",
  loginPath: "/login",
  metadataPath: "/metadata",
  sloPath: "/logout",
  spidLevelsWhitelist: ["SpidL2", "SpidL3"],
};

The acs callback will receive a second parameter, containing the information extracted during login step for the user:


const acs: AssertionConsumerServiceT<ExtraParamsT> = async (
  payload,
  extraParams
  // ^^^ 
  // ExtraParamsT | undefined
) => {
  logger.info("acs:%s%s", JSON.stringify(payload), JSON.stringify(extraParams));
  return ResponsePermanentRedirect({ href: "/success?acs" } as ValidUrl);
};

NOTE: If the mapper or the coded return a validation error, extraParams will be undefined. NOTE 2: It's better to define the codec with defaults and/or partial properties, to avoid undefined values during deploy phase (ie: Data stored before the deploy that cannot be decoded with new codec because of lack of required properties)

Local development

To run the project locally with the embedded example express application run the following commands:

yarn install
yarn build
docker-compose up --build

PS. If was present locally a previously cached version of io-spid-commons docker container and you get the error Unexpected token < on node_modules/xml-encription/lib/templates/encrypted-key.tpl.xml.js, is needed to clean all the old containers datas with docker system prune --all before running the project again.