Successfully reported this slideshow.
We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. You can change your ad preferences anytime.

XACML for Developers - Updates, New Tools, & Patterns for the Eager #IAM Developer

8,071 views

Published on

In this presentation I introduce the basics of Attribute-based Access Control, XACML, and why it matters to developers. I also focus on the latest XACML TC profiles - the REST profile and the JSON profile that make integration easier and faster.

Published in: Technology
  • Be the first to comment

XACML for Developers - Updates, New Tools, & Patterns for the Eager #IAM Developer

  1. 1. XACML for Developers Updates, New Tools, & Patterns for the Eager #IAM Developer #CISNapa - @davidjbrossard - @axiomatics 1
  2. 2. eXtensible Access Control Markup Language 2 What is XACML? Not guacamole De facto standard Defined at OASIS #CISNapa - @davidjbrossard - @axiomatics
  3. 3. One of the several standards in the #IAM family XACML in the IAM spectrum SAML SPML LDAP RBAC ABAC… SCIM OpenID Oauth WS-* #CISNapa - @davidjbrossard - @axiomatics 3
  4. 4. In a web 3.0 world where it’s about small apps and your data… Why XACML? it’s time to get leaks under control #CISNapa - @davidjbrossard - @axiomatics 4
  5. 5. What’s Attribute-based Access Control? #CISNapa - @davidjbrossard - @axiomatics 5
  6. 6. #CISNapa - @davidjbrossard - @axiomatics In the olden days, authorization was about Who? 6
  7. 7. Authorization should really be about… When?What? How?Where?Who? Why? 7#CISNapa - @davidjbrossard - @axiomatics
  8. 8. A car retail company has a web application that users can access to create, view, and approve purchase orders, in accordance with policy rules 8 Example Scenario: Managing Purchase Orders #CISNapa - @davidjbrossard - @axiomatics
  9. 9. Attributes Resource attributes Resource type PO amount PO location PO creator PO Status Subject attributes Identity Department Location Approval limit Role Action attributes Action type Environment attributes Device type IP address Time of day Profile designed by Sven Gabriel from The Noun Project Invisible designed by Andrew Cameron from The Noun Project Wrench designed by John O’Shea from The Noun Project Clock designed by Brandon Hopkins from The Noun Project PO Id #CISNapa - @davidjbrossard - @axiomatics 9
  10. 10. A simple rule Anyone in the purchasing department can create purchase orders #CISNapa - @davidjbrossard - @axiomatics 10
  11. 11. A manager in the purchasing department can approve purchase orders  up to their approval limit  if and only if the PO location and the manager location are the same  if and only if the manager is not the PO creator 11 A richer rule #CISNapa - @davidjbrossard - @axiomatics
  12. 12. XACML 101 – The Basics 12#CISNapa - @davidjbrossard - @axiomatics
  13. 13. 13 What does XACML contain? XACML Reference Architecture Policy Language Request / Response Protocol #CISNapa - @davidjbrossard - @axiomatics
  14. 14. XACML Architecture & Flow 14 Decide Policy Decision Point Manage Policy Administration Point Support Policy Information Point Policy Retrieval Point Enforce Policy Enforcement Point #CISNapa - @davidjbrossard - @axiomatics Access Document #123 Access Document #123 Can Alice access Document #123? Yes, Permit Load XACML policies Retrieve user role, clearance and document classification
  15. 15. 15 What does XACML contain? XACML Reference Architecture Policy Language Request / Response Protocol #CISNapa - @davidjbrossard - @axiomatics
  16. 16. 3 structural elements PolicySet Policy Rule Root: either of PolicySet or Policy PolicySets contain any number of PolicySets & Policies Policies contain Rules Rules contain an Effect: Permit / Deny Combining Algorithms 16 Language Elements of XACML #CISNapa - @davidjbrossard - @axiomatics
  17. 17. Root Policy Set PolicySet Policy Rule Effect=Permit Rule Effect = Deny PolicySet Policy Rule Effect = Permit #CISNapa - @davidjbrossard - @axiomatics 17 Sample XACML Policy
  18. 18. 18 Language Structure: Russian dolls PolicySet, Policy & Rule can contain Targets Obligations Advice Rules can contain Conditions Policy Set Policy Rule Effect=Permit Target Target Target Obligation Obligation Obligation Condition #CISNapa - @davidjbrossard - @axiomatics
  19. 19. 19 What does XACML contain? XACML Reference Architecture Policy Language Request / Response Protocol #CISNapa - @davidjbrossard - @axiomatics
  20. 20. • Subject User id = Alice Role = Manager • Action Action id = approve • Resource Resource type = Purchase Order PO #= 12367 • Environment Device Type = Laptop 20 Structure of a XACML Request / Response XACML Request XACML Response Can Manager Alice approve Purchase Order 12367? Yes, she can • Result Decision: Permit Status: ok The core XACML specification does not define any specific transport / communication protocol: -Developers can choose their own. -The SAML profile defines a binding to send requests/responses over SAML assertions #CISNapa - @davidjbrossard - @axiomatics
  21. 21. So what’s in it for the developer? #CISNapa - @davidjbrossard - @axiomatics 21
  22. 22. #1 A single authorization model & framework #CISNapa - @davidjbrossard - @axiomatics 22
  23. 23. #CISNapa - @davidjbrossard - @axiomatics 23 #1.a working across all layers
  24. 24. #1.b and across different technology stacks Java C Objective-C C++ C# PHP Python (Visual) Basic Perl Ruby JavaScript Visual Basic .NET Lisp Pascal Delphi/Object Pascal Share of programming languages (Feb 2013) #CISNapa - @davidjbrossard - @axiomatics 24
  25. 25. #2 A rich language to express many scenarios ACLs RBAC Whitelists Segregation-of-Duty Relation-based Trust Elevation Device-based Break the glass Privacy protection ABAC Rich business flows Data redaction #CISNapa - @davidjbrossard - @axiomatics 25
  26. 26. The REST profile of XACML OASIS XACML profile Designed by Remon Sinnema of EMC2 #3 Developer-friendly APIs XML over HTTP XML over HTTP #CISNapa - @davidjbrossard - @axiomatics 26 JSON over HTTP JSON over HTTP
  27. 27. #3. Developer-friendly APIs (cont’d) Drop the… Use curl, Perl, and Python with the REST API curl -X POST -H 'Content-type:text/xml' -T xacml-request.xml http://foo:8443/asm-pdp/pdp #CISNapa - @davidjbrossard - @axiomatics 27
  28. 28. Use the JSON profile of XACML Idea Remove the verbose aspects of XACML Focus on the key points Make a request easy to read #4 Simplified request/response #CISNapa - @davidjbrossard - @axiomatics 28
  29. 29. #4 Sample XACML Before JSON (cont’d) <xacml-ctx:Request ReturnPolicyIdList="true" CombinedDecision="false" xmlns:xacml- ctx="urn:oasis:names:tc:xacml:3.0:core:schema:wd-17"> <xacml-ctx:Attributes Category="urn:oasis:names:tc:xacml:1.0:subject-category:access-subject" > <xacml-ctx:Attribute AttributeId="urn:oasis:names:tc:xacml:1.0:subject:subject-id" IncludeInResult="true"> <xacml-ctx:AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">Alice</xacml-ctx:AttributeValue> </xacml-ctx:Attribute> </xacml-ctx:Attributes> <xacml-ctx:Attributes Category="urn:oasis:names:tc:xacml:3.0:attribute-category:environment" > </xacml-ctx:Attributes> <xacml-ctx:Attributes Category="urn:oasis:names:tc:xacml:3.0:attribute-category:resource" > <xacml-ctx:Attribute AttributeId="urn:oasis:names:tc:xacml:1.0:resource:resource-id" IncludeInResult="true"> <xacml-ctx:AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">hello</xacml- ctx:AttributeValue> </xacml-ctx:Attribute> </xacml-ctx:Attributes> <xacml-ctx:Attributes Category="urn:oasis:names:tc:xacml:3.0:attribute-category:action" > <xacml-ctx:Attribute AttributeId="urn:oasis:names:tc:xacml:1.0:action:action-id" IncludeInResult="true"> <xacml-ctx:AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">say</xacml-ctx:AttributeValue> </xacml-ctx:Attribute> </xacml-ctx:Attributes> </xacml-ctx:Request> #CISNapa - @davidjbrossard - @axiomatics 29
  30. 30. #4 Sample XACML using JSON (cont’d) {"subject": {"attribute":[{ "attributeId":"username", "value":"alice"}]}, "resource": {"attribute":[{ "attributeId":"resource-id", "value":"hello"}]}, "action": {"attribute":[{ "attributeId":"action-id", "value":"say"}]}} #CISNapa - @davidjbrossard - @axiomatics 30
  31. 31. #4 JSON & XML Side-by-side comparison 0 10 20 30 40 50 Word count XML JSON 0 200 400 600 800 1000 1200 1400 Char. Count XML JSON #CISNapa - @davidjbrossard - @axiomatics 31 Size of a XACML request
  32. 32. Natural language authoring Axiomatics Language for Authorization (ALFA) Research initiative from TSSG And many more coming… #5 Easy authoring tools #CISNapa - @davidjbrossard - @axiomatics 32
  33. 33. Provide the right tools for Easy Authoring Of XACML policies #5 Axiomatics Language For AuthZ (cont’d) Plugs into Eclipse IDE High-level syntax Auto-complete Automatic Translation to XACML 3.0 #CISNapa - @davidjbrossard - @axiomatics 33
  34. 34. Wrapping up Benefits for the developer #CISNapa - @davidjbrossard - @axiomatics 34
  35. 35. One consistent authorization model Many different applications Decide once, enforce everywhere Benefits of using XACML #1 #CISNapa - @davidjbrossard - @axiomatics 35
  36. 36. Adios endless if, else statements Hello simple if(authorized()) Benefits of using XACML #2 #CISNapa - @davidjbrossard - @axiomatics 36 0 5000 10000 15000 20000 25000 30000 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 Developer Happiness Increase Number of if / else statements terminated Developer Happiness Index
  37. 37. Security potholes are a thing of the past XACML is the concrete that fills in the cracks in your authorization wall Benefits of using XACML #3 #CISNapa - @davidjbrossard - @axiomatics 37
  38. 38. Let developers do what they know best Offload auditing, info security to security architects & auditors by externalizing authorization #CISNapa - @davidjbrossard - @axiomatics 38 Benefits of using XACML #4 Happy developer Happy auditor
  39. 39. #CISNapa - @davidjbrossard - @axiomatics 39 Next steps? Download XACML SDK Download ALFA plugin Download Eclipse Code in your favorite language
  40. 40. Questions? Contact us at info@axiomatics.comQ&A

×