Yes, Central Authentication Service (CAS) can handle authorization, but it\u2019s not its primary function. CAS excels at authentication \u2013 verifying who a user is. For authorization \u2013 deciding what a user can do \u2013 you typically need to integrate CAS with other systems or use CAS attributes and release policies.<\/p>\n
Before diving into how, let\u2019s clarify:<\/p>\n
Authentication: Proving identity (e.g., username\/password check).
\nAuthorization: Granting access to resources based on that identity (e.g., role-based access control).<\/p>\n
CAS focuses on the first part. Authorization often requires more complex logic than CAS provides out of the box.<\/p>\n
Using Attributes and Release Policies<\/p>\n
CAS can release user attributes (e.g., roles, group memberships) to applications after successful authentication.
\nApplications then use these attributes to make authorization decisions.
\nConfigure CAS to release the necessary attributes in cas.properties:<\/p>\n
attributeRepository = myAttributeRepository
\nreleasePolicy = allowAll<\/p>\n
Important: The allowAll policy is generally not recommended for production environments as it releases all attributes. Define a more restrictive release policy based on your application\u2019s needs.<\/p>\n
Example attribute repository (Java):<\/p>\n
public class MyAttributeRepository implements AttributeRepository {
\n @Override
\n public Set<String> getAttributesFor(String principal, Credential credential) {
\n Set<String> attributes = new HashSet<>();
\n \/\/ Logic to fetch user roles from a database or other source
\n if (principal.equals(“user1”)) {
\n attributes.add(“ROLE_ADMIN”);
\n } else {
\n attributes.add(“ROLE_USER”);
\n }
\n return attributes;
\n }
\n}<\/p>\n
Integrating with an Authorization Server (e.g., OAuth 2.0, OpenID Connect)<\/p>\n
CAS can act as an identity provider (IdP) for an authorization server.
\nThe authorization server handles the complex authorization logic and issues access tokens to applications.
\nThis is a more robust solution for complex scenarios.
\nYou\u2019ll need to configure CAS to support the relevant protocols (e.g., OpenID Connect).<\/p>\n
Using Proxy Tickets and Application-Level Authorization<\/p>\n
CAS can issue proxy tickets, allowing applications to request authorization information from other services on behalf of the user.
\nApplications are responsible for interpreting these tickets and making authorization decisions.
\nThis approach requires more development effort but provides greater flexibility.<\/p>\n
Custom CAS Filters<\/p>\n
You can write custom filters to intercept requests and perform authorization checks based on user attributes or other criteria.
\nThis is the most flexible option, but it requires a deep understanding of the CAS architecture.<\/p>\n
Configure CAS to release user roles as attributes (as shown in step 1).
\nIn your application, retrieve the user\u2019s roles from the CAS ticket.
\nImplement role-based access control logic based on these roles. For example:
\n\/\/ Example Java code
\nString[] roles = (String[]) session.getAttribute(“roles”);
\nif (Arrays.asList(roles).contains(“ROLE_ADMIN”)) {
\n \/\/ Allow access to admin features
\n} else {
\n \/\/ Deny access or redirect to an error page
\n}<\/p>\n
Attribute Release Policy: Carefully control which attributes are released to applications. Avoid releasing sensitive information unnecessarily.
\nTrust Relationships: Ensure that you trust the applications receiving CAS tickets.
\nInput Validation: Validate all user input and attribute values to prevent security vulnerabilities.<\/p>\n
The post CAS Authorization: A Practical Guide<\/a> appeared first on Blog | G5 Cyber Security<\/a>.<\/p>","protected":false},"excerpt":{"rendered":" TL;DR Yes, Central Authentication Service (CAS) can handle authorization, but it\u2019s not its primary function. CAS excels at authentication \u2013 verifying who a user is. For authorization \u2013 deciding what a user can do \u2013 you typically need to integrate CAS with other systems or use CAS attributes and release policies. Understanding the Difference Before […]<\/p>\n","protected":false},"author":0,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2],"tags":[],"class_list":["post-6393","post","type-post","status-publish","format-standard","hentry","category-news"],"_links":{"self":[{"href":"https:\/\/cybersecurityinfocus.com\/index.php?rest_route=\/wp\/v2\/posts\/6393"}],"collection":[{"href":"https:\/\/cybersecurityinfocus.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/cybersecurityinfocus.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"replies":[{"embeddable":true,"href":"https:\/\/cybersecurityinfocus.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=6393"}],"version-history":[{"count":0,"href":"https:\/\/cybersecurityinfocus.com\/index.php?rest_route=\/wp\/v2\/posts\/6393\/revisions"}],"wp:attachment":[{"href":"https:\/\/cybersecurityinfocus.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=6393"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cybersecurityinfocus.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=6393"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cybersecurityinfocus.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=6393"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}