Migration Dbjeton Security To OAuth 2.0

 Domain : Insurance 

Application : Lagacy Applications

Security : Db Jeton from IBM 

Legacy Applications : 

This plan provides a high-level roadmap. For a production environment, you will need to make specific decisions based on your exact application stack and Okta tenant configuration.

Architectural Overview

The core strategy is a phased coexistence pattern . This allows your legacy and new authentication systems to run in parallel, enabling a smooth, zero-downtime migration for your users.

Step-by-Step Migration Plan

Phase 1: Infrastructure and Okta Setup

1. Okta Tenant & Application Configuration

   • Sign up for an Okta developer account and create your tenant.

   • Use the Okta CLI or Admin Console to create a new OIDC Web Application. This is a crucial step for obtaining your clientId and clientSecret .

   • Configure the Login Redirect URI to point to your application's callback endpoint, for example, http://localhost:8080/login/oauth2/code/okta for local development. This endpoint is critical for the OAuth 2.0 authorization code flow.

   • Configure the Logout Redirect URI for a clean session termination .

   • (Optional but recommended) Define custom scopes and configure claims to pass user roles and permissions from Okta to your Spring Boot application .

Phase 2: Spring Boot Backend Migration

2. Update Dependencies

   • Ensure your Spring Boot version is at least 2.1.x to leverage the first-class OIDC support in Spring Security 5.1 and newer .

   • Add the official Okta Spring Boot Starter to your pom.xml or build.gradle file. This library simplifies the configuration significantly compared to earlier Spring Security OAuth2 libraries .

   xml

   <dependency>
       <groupId>com.okta.spring</groupId>
       <artifactId>okta-spring-boot-starter</artifactId>
       <version>3.0.6</version>
   </dependency>

3. Configure Application Properties

   • Move your Okta configuration to application.yml or application.properties. The Okta starter is convention-based, and these properties will auto-configure your application as both an OAuth 2.0 client and a resource server .

   yaml

   okta:
     oauth2:
       issuer: https://{yourOktaDomain}/oauth2/default
       client-id: {your-client-id}
       client-secret: {your-client-secret}
       scopes: openid, profile, email, offline_access
   spring:
     security:
       oauth2:
         client:
           registration:
             okta:
               client-id: ${okta.oauth2.client-id}
               client-secret: ${okta.oauth2.client-secret}
           provider:
             okta:
               issuer-uri: ${okta.oauth2.issuer}
         resourceserver:
           jwt:
             issuer-uri: ${okta.oauth2.issuer}

4. Implement Dual Token Validation Filter

   • This is the most critical step for a seamless transition. You need a custom security filter that can validate both the new Okta-issued JWTs and your existing Jeton tokens .

   • If validation fails for Okta, the filter can attempt to validate the Jeton token. You can check the token's issuer or kid to decide which validation path to follow .

   • On successful Jeton validation, you can programmatically generate an Okta session or token for the user, effectively migrating them in real-time . This strategy is often called "Just-In-Time" (JIT) migration .

5. (Optional) Remove Legacy Code

   • After you have confirmed that all active users have been migrated and your application is stable, you can safely remove the legacy Jeton validation filter and related dependencies.

   • This is the final step of your "directory coexistence" strategy .

Phase 3: Frontend (Angular/React) Migration

6. Integrate Okta SDK

   • Replace your custom Jeton authentication logic with the official Okta SDK for Angular or React.

   • The SDK will handle the OIDC redirects, token storage, and automatically attach the access token to outgoing API requests.

7. Update API Calls

   • Ensure your frontend API client (e.g., axios, HttpClient) is configured to read the Okta access token from storage and include it in the Authorization: Bearer <token> header.

Phase 4: Deployment Strategy

8. Incremental Deployment

   • Stage 1 (Coexistence): Deploy the updated backend with the dual validation filter and the updated frontend with the Okta SDK. Both authentication mechanisms work in parallel.

   • Stage 2 (Cut-over): Once you confirm that Jeton tokens are no longer being used by active sessions, you can disable the legacy filter via a feature flag or a configuration change.

   • Stage 3 (Cleanup): Deploy a version of the application with the legacy authentication code completely removed .