OGC Web Service Shibboleth Interoperability Experiment
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OGC Web Service Shibboleth Interoperability Experiment

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Presented by Chris Higgins at the INSPIRE Conference 2011, 27 June 2011.

Presented by Chris Higgins at the INSPIRE Conference 2011, 27 June 2011.

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  • Refer to other 7 ESDIN presentations during the conference. Most Weds/Thurs, but also Antti on Fri
  • A good example of how EU funded projects might interact with the OGC Mention that the main use case is Key Users accessing pan-European large scale reference data from NMCA’s
  • Cannot assume all in audience know about Shibb Mostly in the academic sector Identity protected Millions of users Talk a bit about the ESDIN Federation
  • Even if all open (free of charge online access) often still need to know who is accessing the data And some data will never be completely open due to personal privacy issues, eg, cadastral parcels?
  • Cannot assume all in audience know about Shibb Mostly in the academic sector Identity protected Millions of users Used throughout the world Australian Access Federation Talk a bit about the ESDIN Federation
  • This diagram adapted from the Switch website
  • Mention have not talked about SAML. Refer to INSPIRE paper
  • Check this table Check with Andrew if he remembers who did what
  • Technically doable, now move on
  • Access Management Federations (AMF) provide a practical organisational model for operational SDI Shibboleth is production strength Small centre, big network of organisations A fundamental SDI requirement demonstrated Additional SDI organisational requirements could be layered on top of the AMF, eg, governance Needs changes to the clients, but not the services or Shibboleth Potential INSPIRE compliant approach for establishing operational strength access control to ensure data provided is only available to legitimate government agencies!

Transcript

  • 1. WORKSHOP: Shibboleth Federations and Secure SDI: Outcomes and Demonstrations from the OGC Web Service Shibboleth Interoperability Experiment Chris Higgins, IE Manager , EDINA National Datacentre, University of Edinburgh, Scotland INSPIRE Conference 2011, Monday 27 th June
  • 2. Workshop Agenda Questions and concluding remarks 1710-1730 4 Demonstration of software working with the test Federation 1640-1710 3 Member States investigating use of Shibb for their NSDI’s 1620-1640 2 Introduction 1600-1620 1 Topic Time
  • 3. ESDIN Project
    • Resourced EDINAs participation in OSI
    • An eContent plus Best Practice Network project
    • September 2008 to March 2011
    • Coordinated by EuroGeographics
    • Key goal : help member states prepare their data for INSPIRE Annex 1 spatial data themes and improve access
    • Been taking forward as the European Location Framework
  • 4. ESDIN project info (www.esdin.eu) Interactive Instruments Bundesamt für Kartographie und Geodäsie Lantmäteriet National Technical University of Athens IGN Belgium Bundesamt für Eich- und Vermessungswesen Universität Münster EDINA, University Edinburgh National Agency for Cadastre and Real Estate Publicity Romania Helsinki University of Technology IGN France Kadaster Kort & Matrikelstyrelsen Geodan Software Development & Technology 1Spatial The Finnish Geodetic Institute National Land Survey of Finland Institute of Geodesy, Cartography and Remote Sensing Statens kartverk EuroGeographics
  • 5. EDINA
    • A National Data Centre for Tertiary Education since 1995
    • to enhance the productivity of research, learning and teaching in UK higher and further education (mission statement)
    • Focus is on services but also undertake r&D
    • Shibboleth used primarily in academic sector
      • https:// www.aai.dfn.de /links/
      • https://spaces.internet2.edu/display/SHIB/ShibbolethFederations
    • EDINA provides technical support in the operation of the UK Access Management Federation
      • Approx 8 million users
      • 837 Member Organisations (IdPs and SPs)
  • 6. O GC Web Service S hibboleth I nteroperability Experiment ( OSI )
    • OGC Interoperability Experiments are:
      • Simple, low overhead, means for OGC members to get together and advance specific technical objectives within the OGC baseline
      • Voluntary
      • Facilitated by OGC staff
    • OSI Press release inviting participation 31 st Aug 2010
    • Technology Integration Experiment on 18 th Nov 2010
    • Draft version of the Engineering Report (OGC 11-019)
      • ER to be completed before September 2011 OGC Technical Committee meeting
  • 7. So whats the problem?
    • Many of the most valuable SDI resources are protected
    • These resources frequently in different admin domains
      • Example: Article 19 of the INSPIRE Directive ”…Member States may limit public access…etc, etc”.
    • No widely accept standard for securing these protected geospatial resources
      • Consequence: lots of point solutions
    • Major interoperability barrier, eg, how can a X-Border application consume protected OWS while having to deal with multiple different access control mechanism?
      • Make everything open? or,
      • Access Management Federations (AMF’s)? or, …?
  • 8. What can AMF’s do for us?
    • Fundamental requirement: information on who is accessing your valuable resource = authentication
    • An AMF allows secure sharing of authentication information across administrative domains
    • Members of a federation form a circle of trust and agree to procedures to enable these cross domain interactions
    • Allows Single Sign On
    • My X-Border appl can now access a protected resource in country A, be challenged for credentials, I authenticate and get access if authorised. Now I can also access additional federation resources (if authorised) in country A, B, C, …, without needing to reauthenticate
  • 9. One Way - Shibboleth
    • Internet2 consortium
    • Open source package for web Single Sign On across admin boundaries based on standards:
      • Security Assertion Markup Language (SAML)‏
    • Organisations can exchange user information and make security assertions by obeying privacy policies
    • Devolved authentication – maintain and leverage existing user management
    • Enables finer grained authorisation through use of attributes
  • 10. SP SP SP SP SP SP SP SP SP SP SP Coordinating Centre Federation Service Providers Identity Providers Users Organisations SP SP SP Authenticates here IdP IdP IdP IdP IdP
  • 11. Why put effort into federated access control round OGC Web Services?
    • Open geospatial interoperability standards underpin SDI
    • OGC standards agnostic about security
    • Lack of a genuinely interoperable security solution a major barrier in all sectors
    • INSPIRE-like, the EU requested that the ESDIN project focus on testing practical existing solutions
      • Shibb integrates with existing identity management systems
      • Possibility of reusing existing member state federations and/or leveraging expertise
  • 12. What we set out to do in OSI
    • Previous work by the same team had shown it was possible to protect WMS with Shibb so that:
      • No mods required to OGC interfaces
      • No mods required to main Shibb download
      • BUT mods required to OWS clients
    • Provide OGC software producing community with means and opportunity of modifying OWS client software to be able to work with Shibboleth AMF’s
    • Emphasis on desktop OWS client software
    • Provide participants with the opportunity to demonstrate their software in action.
  • 13. OSI - How
    • Use the test ESDIN Federation to provide OSI participants with services to develop against
    • Provide an open source reference implementation of a modified desktop client conformant with the SAML ECP Profile
      • http:// esdin.fgi.fi/wiki/index.php/Esdin:AuthIE:Client
    • Provide some technical support, eg, with OpenLayers clients conformant with the Web Browser SSO Profile
    • Regular telcons
    • OSI Technology Integration Experiment event
  • 14. OSI - Who
    • 36 individuals registered Shibb OGC portal site
    • EDINA, Snowflake, Cadcorp, Envitia, con terra/ESRI, Joint Research Centre all modified their OWS client software or open source
    • Federal Agency for Cartography and Geodesy (BKG) contributed another test Shibb federation they have been using for similar purposes
  • 15. Who modified what X X Proxy X X Browser X X X X Desktop X X X X WFS X X X X X WMS Envitia JRC (open source) con terra Cadcorp Snowflake EDINA (open source) Organisation Name Type of Client
  • 16. Technology Integration Experiment Webinar
    • Afternoon of Thurs 18 th November, 2010
    • Approx 30 people turned up on the day
    • EDINA, Snowflake, Cadcorp, Envitia, con terra, JRC, demonstrated:
      • Different clients (desktop, browser, proxy)
      • Different services (WMS and WFS)
      • Different federations (ESDIN and BKG)
  • 17. OSI – Outcomes #1
    • Using Shibboleth to protect OWS is practical
    • Not particularly difficult on server side
    • Not particularly difficult with browser based clients
    • More subtle with desktop based clients but possible with some effort in short space of time; weeks, not months
    • This kind of “IE testbed” approach appreciated by participating OGC members
    • Operationalise and community support and tooling will be available
  • 18. OSI/ESDIN Outcomes #2
    • From the European Interoperability Framework for Pan-European eGovernment Services ( http://ec.europa.eu/idabc/servlets/Docb0db.pdf?id=31597 )
    Hard
  • 19. INSPIRE Federation OWS Providers Member State organisations, eg, NMCAs WMS Key organisations, eg. EEA, JRC WMS WMS WMS WMS WMS WFS WFS WFS WFS WFS WFS IdP IdP IdP IdP IdP IdP Coordinating Centre
  • 20. Some options for going forward:
    • One Federation and every every legally mandated organisation joins
    • Multiple federations: one in each country and one pan-European
    • One federation: one organisation in each country, the INSPIRE point of contact joins the single pan-European federation and acts as the gateway for all the other legally mandated organisations in the country that are standing up INSPIRE services
    • Multiple federations: one in each country and inter-federation interoperability ensures SSO
  • 21. All material will be available from: http://igibs.blogs.edina.ac.uk/inspire2011/ Comments, questions, suggestions, etc, on blog very welcome Or email: [email_address]
  • 22. Workshop Agenda Questions and concluding remarks 1710-1730 4 Demonstration of software working with the test Federation 1640-1710 3 Member States investigating use of Shibb for their NSDI’s 1620-1640 2 Introduction 1600-1620 1 Topic Time