26 Mai 2004 Séminaire Croisé : Sécurité Informatique Ubiquitaire1 Security Architecture for GRID Applications Séminaire Croisé Sécurité Informatique Ubiquitaire

26 Mai 2004 Séminaire Croisé : Sécurité Informatique Ubiquitaire

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Security Architecture for GRID Applications

Séminaire Croisé Sécurité Informatique Ubiquitaire

1. Introduction to the GRID

2. ProActive

3. Declarative Security

4. Example

Arnaud Contes - OASIS


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1. Introduction : Context

Net

Applications

Single Grid

Distributed Grid


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Issues for Grid Security

Authentication of Computers, Users, and Applications

Creation, connection to, and monitoring of activities Authentication, Integrity and Confidentiality (AIC) of

communications Hierarchical domains Security Policies: Application, Domain Variation in Grid network links : LAN, Wireless,

VPN, Internet Variation in deployment


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Objectives

Goals : Authentication of Computers, Users, and Applications Communication authentication, privacy and integrity Security defined at user and administrator level Easy and adaptable configuration Support for current middlewares features :

deployment, migration, group communication, components

Ways : Ubiquitous Security (Meta Object Protocol) Logical Security Architecture / Abstract Deployment Declarative Security Language


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A Java API + Tools for Parallel, Distributed Computing A uniform framework: An Active Object pattern A formal model behind: Prop. Determinism, insensitivity to

deploy.

Main features: Remotely accessible Objects Asynchronous Communications with synchro: automatic

Futures Group Communications, Migration (mobile computations) XML Deployment Descriptors Interfaced with various protocols: rsh,ssh,LSF,Globus,Jini,RMIregistry

Visualization and monitoring: IC2D Security

2. ProActive


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Standard system at Runtime

No sharing between activities

Active Object

Passive Object

Node


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Secure Active Object

Body

Reply Receiver

Service

A

Security Manager Reply

Sender

Request Sender

Request Receiver

B

Stub_A

Proxy

node1 node2


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Abstract Deployment Model

A key principle: Abstract Away from source code: Machine names,

Creation Protocols, Lookup and Registry Protocols In program source: Virtual Node (a string

name) In XML descriptors:

Mapping of VN to JVMs Create or Acquire JVMs

Program Source Descriptor (RunTime)|----------------------------------| |-------------------------------------------|

Activities (AO) --> VN VN --> JVMs --> Hosts


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Descriptors: Mapping Virtual Nodes

VirtualNodes:DispatcherRendererSet

Mapping: Dispatcher --> DispatcherJVM RendererSet --> JVMset

JVMs: DispatcherJVM = Current // (the current JVM)

JVMset=//ClusterSophia.inria.fr/ <Protocol GlobusGram … 10 >


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3. Security

Non-functional security Hierarchical security domains Dynamic policy negotiation Certification chain to identify users, JVMs,

objects Application security policies set by

deployment descriptors


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Authentication : X509 Certificate

Requestor Generates Key PairCA Verifies ID, Key Pair,and User Eligibility

CA Binds Public Key to IDby Signing the Certificate

CA Presents Signed X509 v3Certificate to Requestor


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Application authentication

User certificate Application certificate

Entities certificatesGenerate certificate


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Hierarchical Domains

Logical way to group many entities that have the same security needs.

Domains are hierarchical. Sub-domains inherits parent’s security policies. Default : Sub-domains cannot weaken parent’s

security policies. ‘Can override‘ : a domain authorizes an entity

to override its policies Find the first common domain if exists Dynamically configurable via SSL connections


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Multi-level Policies

Dn

Accept Deny

D0

Accept Deny

Dn-1

Accept Deny

VN

Accept DenyAO

Accept Deny

Computing a security policy according all matching rules from domains, Virtual Node and Active Object.

Security policy

Administrator-/ User-level policy

Application-level policy


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Security Rule

Interactions : JVMCreation NodeCreation CodeLoading ObjectCreation ObjectMigration Request Reply Listing

Entities : Domain User Virtual

Node Object

Entities -> Entities : Interactions # Security Attributes

Attributes : Authentication Integrity Confidentiality

Each attribute can be :

Allowed Optional Disallowed


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Combining Policies

Search for the most specific rule in each domain.

Retrieve all matching rules in the Domain hierarchy, the Virtual Node and the Active Object.

Compute policies according to security attributes.Required (+)

Required (+)

Optional (?)

Disallowed (-)

Optional (?)

Disallowed (-)

SenderReceiver

+ +

+ ?

- -

-

invalid

invalid


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Descriptor Security Model

A key principle: Specify security policies according to the

deployment In program source:

Virtual Node (VN, a string name): In XML descriptors:

List of policy rules Trusted Certification Authorities


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Descriptors: Security

VirtualNodes vn1, vn2

SECURITY: VN [vn1] -> VN [vn2] : Q,P # [+A,?I,+C] VN [vn1] -> VN [vn2] : M # Forbidden VN [vn2] -> VN [vn1] : Q,P # [?A,?I,?C] VN [vn2] -> VN [vn1] : M # ForbiddenMapping: vn1 --> GridAComputers, GridBComputers vn2 --> GridAComputersJVMs: /…/


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ProActive Security Manager

In charge of security for an active object Retrieve, combine and negotiate policies Negotiate session key, Encrypt/decrypt messages


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Request to an Active Object

Body

Request Receiver

Reply Receiver

Service

Object

Security Manager

Reply Sender

Body

Request Receiver

Reply Receiver

ServiceObject

Security Manager

Reply Sender

Proxy

Request Sender

Request Sender

•Policy computation

• Keys exchange

Request path Security mechanims

encrypt decrypt

Active Object


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4. Example

2 domaines GridA & gridB with security policies

Domain [GridA] -> Domain [GridB] : Q,P,M # [+A,+I,+C]

Domain [GridB] -> Domain [GridA] : Q,P,M # [+A,+I,+C]

Application : 2 Virtual Nodes (vn1,vn2) 2 Active objects


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Example

Domain GridA Domain GridB

VN1VN2

Policy rules database

JVM


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Descriptors: Security

VirtualNodes vn1, vn2

SECURITY: VN [vn1] -> VN [vn2] : Q,P # [+A,?I,+C] VN [vn1] -> VN [vn2] : M # Forbidden VN [vn2] -> VN [vn1] : Q,P # [?A,?I,?C] VN [vn2] -> VN [vn1] : M # ForbiddenMapping: vn1 --> GridAComputers, GridBComputers vn2 --> GridAComputersJVMs: /…/


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Example

/…/proActiveDescriptor.activateMappings();vn1 = proActiveDescriptor.getVirtualNode("vm1");vn2 = proActiveDescriptor.getVirtualNode("vm2");/…/Flower rose = (Flower) ProActive.newActive(Flower.class,new Object[]{« Rose »}, vn1.getNode()};Flower daliah = (Flower) ProActive.newActive(Flower.class,new Object[]{« Daliah »}, vn2.getNode()};/* next VN1 node inside the same domain */rose.migrateTo(vn1);/* communication inside the same domain */rose.sayHelloTo(daliah);/* other virtual node, forbidden */rose.migrateTo(vn2);/* next VN1 Node, other domain */rose.migrateTo(vn1);/* communication with another domain */rose.sayHelloTo(daliah);


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Example



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Example


VN1VN2


JVM


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Example



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Example


Rose

Daliah

VN1VN2


JVM


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Example



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Example


Rose

Daliah

VN1VN2


Migration : - same VN - same domain

Can I migrate to the next VN1 node ?

JVM


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Example


Daliah

VN1VN2


Rose


1 - retrieve VN policy2 - migration allowed

JVM


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Example


Rose

Daliah

VN1VN2



JVM


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Example



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Example


Rose

Daliah

VN1VN2


Method call : - other VN - same domain

JVM

Can I make a method call to Daliah on vn2 ?


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Example


VN1VN2


Method call : - other VN - same domain

JVM

Rose

1 - VN1 -> VN2 : [?A,?I,?C] 2 - result policy : [?A,?I,?C] 3 - method call allowed

Daliah


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Example



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Example


Daliah

VN1VN2


Migration : - other VN - same domain

JVM

Rose

Can I migrate to the next VN2 node ?

VN1 policy : forbidden


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Example



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Example


Rose

Daliah

VN1VN2


Migration : - same VN - other domain

JVM

Can I migrate to the next VN1 node on

GridB domain?


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Example


Daliah

VN1VN2


Migration : - same VN - other domain Rose

JVM

1- VN1 policy -> none2- GridA -> GridB : [+A,+I,+C] 3- migration with [+A,+I,+C]


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Example


Rose

Daliah

VN1VN2


Migration : - same VN - other domain

JVM


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Example



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Example


Daliah

VN1VN2


Method call : - other VN - other domain Rose

JVM


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Conclusion

ProActive Security Features Authentication of users and applications Authentication, integrity and confidentiality of

communications Security model for mobile applications Dynamically negotiated policies, non-functional

security Logical security representation : security is easily

adaptable to the deployment Perspectives:

Group communication, OGSA Security: Open Grid Services Architecture, Hardware mobility : PDAs


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Questions ?

Documents

26 Mai 2004 Séminaire Croisé : Sécurité Informatique Ubiquitaire1 Security Architecture for GRID Applications Séminaire Croisé Sécurité Informatique Ubiquitaire