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Federated Authentication Process Using Oracle Identity Federation
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A federation solution focuses on authentication, and in many cases authorization, of information transactions across enterprise boundaries Figure 8-12 illustrates a sample federation request architecture in which a federation partner in domain A is trying to access information in a web application in domain B through a federated authentication process using Oracle Identity Federation (OIF) In this scenario, a requestor of information acts as the identity provider (IdP), and a server of information acts as the service provider (SP) The OIF IdP leverages federation standards, such as Security Assertion Markup Language (SAML) and Liberty, to propagate a user s identity to the partner s domain where the OIF SP accepts that request and evaluates the access request to the web application using a local set of federation and access policies If the requester is a valid user, it allows the access to the federated web application and keeps the HTTP session alive as long as the federation token (for example, SAML token) is valid
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Part III:
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Identity Management
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Centralized Database Authentication Using Oracle Enterprise User Security
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Oracle Enterprise User Security (EUS) is a solution offered as part of the Oracle Database (since version 9i) that uses an externalized LDAP server, such as Oracle Internet Directory, to externalize database user authentications In addition to centralizing the authentication to the database, you can also centralize the authorizations for the authenticated sessions by mapping database roles and privileges to centralized LDAP groups Figure 8-13 shows typical solution when the architecture needs to support end user authentication into the database tier, perhaps for additional access control using database roles/privileges or performing end user auditing on the database objects (tables, views, and so on) The Oracle products that enable this solution are the LDAP products (OID or OVD) and the EUS feature in the Oracle Database Server The choice of LDAP product is yours based on your requirements For instance, if you already have a physical LDAP server, you would simply layer the OVD product on top of the existing repository to make EUS work for your Oracle Database authentications
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Managing and enforcing proper authorizations in an application are two of the most difficult and growing challenges in identity management The topic of authorization management could fill an entire book for a comprehensive understanding of the solution In this section, we will discuss a summary of this class of solution and the basic overview of how Oracle is approaching this space As shown in Figure 8-14, two kinds of authorization management solutions exist: web access management and entitlement management
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8: Architecting Identity Management
Centralized database authentication
Web access management is a solution to perform authorization checks on resources with a particular URI pattern (for example, xxxx/xxx/xx/pattern*) This type of authorization is considered coarse-grained and works on web applications that are neatly partitioned using unique URLs, which are then mapped toward roles and privileges in the LDAP server This solution is useful for protecting application access at high levels, where the policies are adjacent to SSO policies The Oracle product that allows such coarse-grained authorizations is the same product that provides SSO functionality to web applications: Oracle Access Manager
Oracle authorization management
Part III:
Identity Management
The second kind of authorization management, entitlement management, provides the ability to authorize resources of any kind inside an application The objects can vary from HTML pages, to Java objects, to Java 2 Platform Enterprise Edition (J2EE) beans, to data records, to user interfaces in middleware applications This solution provides a much more flexible and sophisticated authorization framework for access control The Oracle Entitlement Server (OES) provides this kind of fine-grained entitlement (authorization) management solution
Oracle Entitlement Server Architecture
OES is a Java-based authorization framework that can integrate with Java and non-Java applications The OES infrastructure comprises five essential components: Policy store A database holding all the entitlement and authorization policies Policy administration point (PAP) The user interface where administrators can define policies around authorizations to resources Policy information point (PIP) enforcement points A provider of policy data to the decision and
Policy decision point (PDP) A policy evaluation engine that decides whether to grant or deny access to a user based on the information it is provided Policy enforcement point (PEP) access in the application The location where the user is either granted or denied
As the architecture shown in Figure 8-15 demonstrates, an application can integrate into the OES authorization decision-making framework in two ways First, an application can choose to make a direct call from application to the OES PDP for a grant/deny decision for a certain user trying to execute a certain action on a specific resource This approach requires an out-of-process call every time a protected resource is accessed and therefore can cause application performance degradation Alternatively, OES offers an embedded policy decision point option for certain types of applications (for example, WebLogic servers, Oracle databases, Microsoft SharePoint servers, and so on) where components known as security modules can embed themselves as part of the application platform and make fast decisions without leaving the boundaries of the application s policy enforcement point Installing a security module for your application relieves you of the responsibility of knowing how your application communicates with the OES components OES is also changing the fundamental shape of access architectures by allowing for the separation of enforcement points from decision points This separation allows any future application to reuse a huge repository of existing business and information privacy policies and therefore significantly lowers the time and cost of application development And maintenance is easier since making changes to policies no longer require application code changes
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