Globus Auth: A Research Identity and Access Management Platform

Globus Auth: A Research Identity and Access Management Platform

Rachana Ananthakrishnan, Kyle Chard, Ian Foster, Mattias Lidman, Brendan McCollam, Stephen Rosen, Steven TueckeThe University of ChicagoArgonne National Laboratory

S. Tuecke, R. Ananthakrishnan, K. Chard, M. Lidman, B. McCollam, S. Rosen, I. Foster, “Globus Auth: A Research Identity and Access Management Platform,” 12th IEEE International Conference on eScience, October 25, 2016.

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10,000 active endpoints

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transfer to date

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130 federated

campus identities

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Globus as a platform

Can we enable researchers to leverage Globus services in their own applications?And, also, extend Globus with other services?

How do we empower the research community to create an integrated ecosystem of services and applications?

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Dependent Services(Resource Servers)

A world of many services, identities, and more

Service(Resource Server)

App(Client)User


Resourceserver

operator

Identity providers

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Identity Provider



Identity Provider

App(Client)


Resourceserver

operator

Common practice today: • Services issue identities

• Hard to use external identities

• Username-password authentication

• Expensive, insecure, non-interoperable

• Poor or no treatment of delegation

User

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Identity Provider



Identity Provider

App(Client)


Resourceserver

operator

We need new approaches:• Slash costs of developing

and operating secure services

• Enhance security in complex, rapidly changing world

• Enable interoperability among services

User

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The authentication and authorization challenge

We need to:• Provide login to apps

– Web, mobile, desktop, command line

• Protect all REST API communications– App Globus service– App non-Globus service– Service service

While:• Not introducing more identities• Providing least privileges security

model• Being agnostic to programming

language and framework• Being web friendly• Making it easy for users and

developers• Following security best practices

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Abbreviated historical perspectives

• Kerberos• Grid Security Infrastructure, Intl Grid Trust Federation

– Secure authentication, multiple IDPs, delegation

• SAML, InCommon, etc.– Identity management federation, integration with campuses

• Web security infrastructure: OAuth2, OIDC, etc.– OIDC for retrieving user identity and attributes from IDPs– OAuth2 defines an authorization service– We integrate, extend to handle delegation, and apply

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Globus Auth

• Foundational identity and access management (IAM) platform service

• Simplifies creation and integration of advanced apps and services

• Brokers authentication and authorization interactions between:– End users– Identity providers: InCommon, XSEDE, Google, portals– Services: resource servers with REST APIs– Apps: web, mobile, desktop, command line clients– Services acting as clients to other services

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Based on widely used web standards

• OAuth 2.0 Authorization Framework (“OAuth2”)

• OpenID Connect Core 1.0 (“OIDC”)

• Allows use of standard OAuth2 and OIDC libraries– E.g., Google OAuth Client Libraries (Java, Python, etc.),

Apache mod_auth_openidc

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Globus account• A Globus account is a set

of identities– A primary identity

o Identity can be primary of only one account

– One or more linked identitieso Identity can (currently) be linked

to only one account

• Account does not have own identifier– Account is uniquely identified

using its primary identity

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Globus Auth integration models:(1) Client credentials grant

Third-Party Service(Client)

1. Authenticate (credentials)Globus Auth

(Authorization Server)

2. Access Tokens

Globus Auth integration models:(2) Authentication grant with delegation

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GlobusTransfer

(Resource Server)

Third-Party Service(Client)

7. Perform Transfer

2. Redirect (Authenticate)

8. Exchange Tokens

4. Auth Code

5. Exchange Code

6. Access Tokens

External Service

1. Access Service

3.Authenticate

Globus Auth(Authorization Server)

9. Tokens

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Globus Auth integration models:(3) Native app grant

Native App

4. Auth Code

1. Access App 3.Authenticate

2. URL to authenticate

6. Exchange Code

7. Access Tokens

Globus Auth(Authorization Server)

5. Register Code

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Globus Auth interactions


Identity Provider

Authorization Server

(Globus Auth)

App(Client)

User*

HTTPS/REST callLogin

* “Resource Owner” in OAuth2 terminology

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Identity Provider

• For a set of scopes– Login: openid, email, profile– HTTPS/REST APIs

• User selects identity provider


(Globus Auth)

App(Client)

1) Request authorization

User


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Identity Provider

• Using existing identities– E.g., XSEDE, University (via

InCommon), Google, web app

• User can link multiple identities into a single Globus Account

• No Globus username (Globus ID) required

• Globus Auth handles naming details, e.g., ePPN vs ePTID


(Globus Auth)

App(Client)

1) Request authorization2) Authenticate resource owner

User


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Identity Provider

• Resource is provided by a resource server

• Limited by a scope

consent


(Globus Auth)

App(Client)

1) Request authorization2) Authenticate resource owner3) Obtain authorization (consent)

for client to access a resource

User


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Identity Provider

App(Client)

• Some grant types issue authorization code, which client exchanges for access token

• Access token is opaque to client

• May include a refresh token, for offline access

access_token


(Globus Auth)


for client to access a resource4) Issue OAuth2 access_token to client

User


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Identity Provider

App(Client)

JWT id_token:• sub: Globus Auth identity id• iss: https://auth.globus.org• name: full name• preferred_username:

e.g., [email protected]• email: email contact• other standard OIDC claims

id_token


(Globus Auth)


for client to access a resource4) Issue OAuth2 access_token to client5) May issue OIDC id_token to client

with resource owner identity

User


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(Globus Auth)

Identity Provider

App(Client) Authorization:

Bearer <access_token>



with resource owner identity6) HTTPS/REST call with access_token

User


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(Globus Auth)

Identity Provider

App(Client)

RFC 7662: OAuth 2.0 Token Introspection response:• active: true or false• client_id• scope• sub: Globus Auth identity id• username: [email protected]• identity_set: linked identities• email• name• other standard claims

access_token




with resource owner identity6) HTTPS/REST call with access_token7) Validate access_token for resource server,

obtain additional info

User


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• Allows resource server to act as client to other resource servers

• Service uses request access_token to get a dependent access_token for each dependent service

• Service acts as client to its dependent services



(Globus Auth)

Identity Provider

App(Client)

HTTPS/REST call

User




with resource owner identity6) HTTPS/REST call with access_token7) Validate access_token for resource server,

obtain additional info8) Issue dependent access tokens to resource server

Login

Dependentaccess_token

Log in with Globus

• Use existing identities (Globus Auth acts as broker)

• Then enable access to community services

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Simple APIs enable integration into apps

• Identity and access management PaaS

docs.globus.org/api/auth • Works with any compliant OAuth2/OIDC client

– We recommend Google OAuth client libraries– Python, Java, PHP, Javascript, .NET

developers.google.com/api-client/library • Python client library for Globus Auth REST API

globus.github.io/globus-sdk-python

(and Globus transfer API)

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Creating a REST API service with Globus Auth• Outsource all identity management and authentication

– Federated identity with InCommon, Google, etc.

• Outsource your REST API security– Consent, token issuance, validation, revocation– You provide service-specific authorization

• Apps use your service like all others– It is standard OAuth2 and OIDC

• Your service can seamlessly leverage other services• Other services can leverage your service• Implement your service using any language and framework

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Typical service interactions

• Service receives HTTPS request with header– Authorization: Bearer <request-access-token>

• Introspects the request access token– Auth API: POST /v2/oauth2/token/introspect– Authorized by client_id and client_secret– Returns: validity, client, scope, effective_identity, identities_set

• Verifies token info• Authorizes request• If service needs to act as client to other services:

– Calls Globus Auth Dependent Token Granto Returns a token for each dependent service

– Uses correct dependent token for downstream REST call

• Responds to client HTTPS request as appropriate

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You can find sample code on GitHub

https://github.com/globus/globus-sample-data-portal.git

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Desktop

Globus Cloud

Firewall

Science DMZ

Prototypical research data portal

Globus Transfer Service

Portal Web Server (Client)

Globus AuthBrowser

User’s Endpoint (optional)

Portal Endpoint

Other Endpoints

HTTPS

GridFTP

REST Other Services

Globus Web Helper Pages

Identity Providers

Identity Providers

Identity Provider

Login

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Desktop

Globus Cloud

Firewall

Science DMZ

Role of Globus Auth



Globus AuthBrowser


Portal Endpoint

Other Endpoints

HTTPS

GridFTP

REST Other Services


Identity Providers

Identity Providers

Identity Provider

Login

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Desktop

Globus Cloud

Firewall

Science DMZ

Role of Globus Transfer and Sharing



Globus AuthBrowser


Portal Endpoint

Other Endpoints

HTTPS

GridFTP

REST Other Services


Identity Providers

Identity Providers

Identity Provider

Login

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Desktop

Globus Cloud

Firewall

Science DMZ

Role of Globus web helper pages



Globus AuthBrowser


Portal Endpoint

Other Endpoints

HTTPS

GridFTP

REST Other Services


Identity Providers

Identity Providers

Identity Provider

Login

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Globus web helper pages

Globus-provided web pages designed for use by your web apps. See https://docs.globus.org/api/helper-pages/

– Browse Endpoint– Select Group– Logout

https://docs.globus.org/api/helper-pages/

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User identity vs. portal identityUser logging into portal results in portal having user’s identity and access token

– Used to make requests on the user’s behalf– Use OAuth2 Authorization Code Grant– User authenticates using their portal identity

Portal may also need its own identity– Access and refresh tokens for this identity– Used to make requests on its own behalf– Use OAuth2 Client Credentials Grant to authenticate the portal

client identity and secret

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Desktop

Globus Cloud

Firewall

Science DMZ




Globus AuthBrowser


Portal Endpoint

Other Endpoints

HTTPS

GridFTP

REST Other Services


Identity Providers

Identity Providers

Identity Provider

Login

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Adding portal as identity provider

If your portal has identities already:• Deploy OIDC server in front of it

– Globus Python OIDC (coming soon)– Any standard OIDC server should work– Requires claim that can map to username– Optional claims: name, email, organization

• Can register apps and services with an effective identity policy– Requires account to have identity from your identity provider when

logging into your app

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Desktop

Globus Cloud

Firewall

Science DMZ




Globus AuthBrowser


Portal Endpoint

Other Endpoints

HTTPS

GridFTP

REST Other Services


Identity Providers

Identity Providers

Identity Provider

Login

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HTTPS to Endpoints

• Each endpoint HTTPS server is a Globus Auth service (resource server)– HTTPS requests authorized via Globus Auth issued OAuth2

access tokens

• Web page can link to file on server– Browser GET will cause HTTPS server to authorize request via

Globus Auth (note SSO)

• Portal (client) can request scope for endpoint resource server– Use access token in requests

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SummaryGlobus Auth makes it easy to:• Add user login to your

applications• Integrate with Globus,

XSEDE, and other services• Add OAuth2 support to your

service’s REST API• Create services that leverage other services

Building on this foundation, we can together create an integrated ecosystem of research services and applications

Learn more at globus.org!

Technology

Globus Auth: A Research Identity and Access Management Platform