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Overview of the New Security Model

Overview of the New Security Model. Akos Frohner (CERN) WP8 Meeting VI DataGRID Conference Barcelone, 12-15 May 2003. Overview. focus is on VOMS details are in D7.6 Security Design. CA. proxy cert:. request. dn, cert, Pkey,. VOMS cred. (short lifetime). certificate:. dn, ca, Pkey.

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Overview of the New Security Model

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  1. Overview of the New Security Model Akos Frohner (CERN) WP8 Meeting VI DataGRID Conference Barcelone, 12-15 May 2003

  2. Overview focus is on VOMSdetails are in D7.6 Security Design CA proxy cert: request dn, cert, Pkey, VOMS cred. (short lifetime) certificate: dn, ca, Pkey certificate user VOMS re-newal delegation: request cert+key VOMS cred: MyProxy (long lifetime) VO, group(s), role(s) delegation: cert+key (short lifetime) proxy cert proxy cert proxy cert proxy cert proxy cert auth auth auth auth auth GSI mod_ssl TrustManager TrustManager GSI authz authz pre-process: pre-process: pre-process: parameters-> parameters-> parameters-> LCAS WebServices Authz obj.id + req. op. dn,attrs,acl, req.op obj.id + req. op. obj.id + req. op. dn,attrs,acl, req.op ->yes/no ->yes/no map map LCMAPS dn -> DB role authz authz authz dn -> userid, krb ticket obj.id -> acl GACL: GACL: dn,attrs,acl, req.op obj.id -> acl obj.id -> acl ->yes/no doit dn,attrs,acl, req.op dn,attrs,acl, req.op doit ->yes/no ->yes/no doit doit doit coarse grained fine grained coarse grained fine grained fine grained (e.g. gatekeeper) (e.g. RepMec) (e.g. GridSite) (e.g. SE, /grid) (e.g. Spitfire) web C Java

  3. high frequency low frequency CA CA CA User’s Authorization in EDG 1.4.x host cert(long life) service user crl update user cert(long life) VO-LDAP registration VO-LDAP grid-proxy-init VO-LDAP mkgridmap proxy cert(short life) grid-mapfile VO-LDAP authentication info

  4. high frequency low frequency CA CA CA User’s Authorization in EDG 2.x host cert(long life) service user crl update user cert(long life) VO-VOMS registration registration VO-VOMS voms-proxy-init VO-VOMS proxy cert(short life) service cert(short life) VO-VOMS authz cert(short life) authz cert(short life) authentication & authorization info edg-java-security LCAS

  5. VOMS Overview • Provides info about the user’s relationship with his VO(‘s) • groups, roles (admin, student, ...), capabilities (free form string), temporal bounds • Features • single login:voms-proxy-init only at the beginning of the session (replaces grid-proxy-init); • expiration time: the authorization information is only valid for a limited period of time (possibly different from the proxy certificate itself); • backward compatibility: the extra VO related information is in the user’s proxy certificate, which can be still used with non VOMS-aware services; • multiple VO’s: the user may authenticate himself with multiple VO’s and create an aggregate proxy certificate; • security: all client-server communications are secured and authenticated.

  6. Tomcat & java-sec Perl CLI axis VOMSimpl Web interface servlet VOMS Architecture vomsd GSI voms-proxy-init soap + SSL DB JDBC https DBI mkgridmap https VOMS server MySQLdb – with history and audit records • User query server and client (C++) • Java Web Service based administration interface • Perl client (batch processing) • Web browser client (generic administrative tasks) • Web server interface for mkgridmap

  7. Migration to VOMS voms-ldap-sync voms-ldap-sync VO-LDAP VOMS VO-LDAP VOMS edg-mkgridmap edg-mkgridmap grid-proxy-init grid-proxy-init grid-mapfile grid-mapfile service user service user proxy proxy phase 0. phase 1. testing the VOMS servers user management on VOMS VOMS VOMS VO-LDAP edg-mkgridmap voms-proxy-init grid-proxy-init voms-proxy-init grid-mapfile service user service user proxy (voms) proxy (voms) phase 2. phase 3. compatibility mode: mixed services fully migrated: only VOMS-aware services

  8. Auth/Authz in Services • GSI based or compatible authentication • grid-mapfile or VOMS based authorization (can be both) • policy or ACL based access control • coarse and fine grained solutions • access control description’s syntax is not standard • implemented alternatives: • edg-java-security for Java web services • GSI/LCAS/LCMAPS for native C/C++ services • mod_ssl/GACL for Apache based web services • (Slahgrid for transparent filesystem ACLs)

  9. Local Site Authorization • Local Centre Authorization Service (LCAS) • Handles authorization requests to local fabric • authorization decisions based on proxy user certificate and job specification; • supports grid-mapfile mechanism. • Plug-in framework (hooks for external authorization plugins) • allowed users (grid-mapfile or allowed_users.db), banned users (ban_users.db), available timeslots (timeslots.db) • plugin for VOMS (to process authorization data) • Local Credential Mapping Service (LCMAPS) • provides local credentials needed for jobs in fabric • mapping based on user identity, VO affiliation, local site policy

  10. edg-java-security • Trust manager • GSI compatible authentication • Adapters to HTTP and SOAP • Currently deployed for Tomcat4 • Authorization Manager • Authorization and mapping for Java services • Plug-in framework for maps: database, XML file and for backward compatibility: gridmap-file • Handles VOMS attributes

  11. TODO • Test the pieces in the Testbeds • Implement the missing pieces and Discarding the unused • Common syntax and semantics for access control configurations • Substitution of VOMS certificates by Attribute Certificates (RFC3281) • Support for time cyclic/bound permissions and roles • Database replication • Use the security model -> get real life use cases

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