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Introduction

Introduction. https://twiki.cern.ch/twiki/bin/view/EGEE/AuthorizationFramework https://twiki.cern.ch/twiki/bin/view/EGEE/AuthZIntro. Few Points. Argus can be used as centralize authorization service It is an attribute base service as appose to identity base service we currently use.

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Introduction

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  1. Introduction • https://twiki.cern.ch/twiki/bin/view/EGEE/AuthorizationFramework • https://twiki.cern.ch/twiki/bin/view/EGEE/AuthZIntro

  2. Few Points • Argus can be used ascentralize authorization service • It is an attribute base service as appose to identity base service we currently use. • Only available for glexec for now • It is meant to replace LCMAPS based authorization in future.

  3. Policy Administration Point (PAP) • Provide tools for authorizing policy • Store and manage policy • Policy Decision Point (PDP) • The PDP receives authorization requests from Policy Enforcement Points and evaluates these requests against authorization policies retrieved from the PAP • Policy Enforcement Point(PEP) • It gather request from client and send it to PDP for evaluation and then PEP act upon by either denying or accepting authorization.

  4. Installation and Configuration • Yum install lcg-CA glite-APEL • Yaim –c –s site-info.def –n ARGUS_server • Site-info.def • mount /etc/grid-security/gridmapdir • Check it • /opt/argus/pap/bin/pap-admin list-policies default (local): ARGUS_HOST= PAP_ADMIN_DN= USERS_CONF= GROUPS_CONF= VOS=

  5. Configuring WN • Yum install glite-GLEXEC_wn • Configure GLEXEC on WN GLEXEC_WN_ARGUS_ENABLED="yes" ARGUS_PEPD_ENDPOINTS="https://t2argus02.physics.ox.ac.uk:8154/authz" GLEXEC_WN_OPMODE="setuid" GLEXEC_WN_LOG_DESTINATION=file GLEXEC_WN_LOG_FILE=/var/log/glexec/glexec_log GLEXEC_WN_INPUT_LOCK=flock GLEXEC_WN_TARGET_LOCK=flock /opt/glite/yaim/bin/yaim -c -s /etc/yaim/site-info.def –n glite-GLEXEC_wn By default opspilot, lhcbpilot and atlaspilot are whiltelisted by /opt/glite/etc/glexec.conf file to use glexec.

  6. Adding and Loading Policy • Define policy resource "http://authz-interop.org/xacml/resource/resource-type/wn" { obligation "http://glite.org/xacml/obligation/local-environment-map" {} action "http://glite.org/xacml/action/execute" { rule permit { vo = dteam } rule permit {pfqan = "/ops/Role=pilot" } rule permit {pfqan = "/atlas/Role=pilot" } } } • Add and Load policy /opt/argus/pap/bin/pap-admin afpdteam_policy /etc/init.d/pdpreloadpolicy /etc/init.d/pepdclearcache

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