This PR introduces JWT (JSON Web Token) authentication for Stirling-PDF,
allowing for stateless authentication capabilities alongside the
existing session-based authentication system.
### Key Features & Changes
JWT Authentication System
- Core Service: JwtService.java - Token generation, validation, and
cookie management
- Authentication Filter: JwtAuthenticationFilter.java - Request
interceptor for JWT validation
- Key Management: KeyPersistenceService.java +
KeyPairCleanupService.java - RSA key rotation and persistence
- Frontend: jwt-init.js - Client-side JWT handling and URL cleanup
Security Integration
- SAML2: JwtSaml2AuthenticationRequestRepository.java - JWT-backed SAML
request storage
- OAuth2: Updated CustomAuthenticationSuccessHandler. java,
CustomOAuth2AuthenticationSuccessHandler.java &
CustomSaml2AuthenticationSuccessHandler.java for JWT integration
- Configuration: Enhanced SecurityConfiguration.java with JWT filter
chain
Infrastructure
- Caching: CacheConfig.java - Caffeine cache for JWT keys
- Database: New JwtVerificationKey.java entity for key storage
- Error Handling: JwtAuthenticationEntryPoint.java for unauthorized
access
### Challenges Encountered
- Configured SecurityConfiguration to use either
`UsernamePasswordAuthenticationFilter` or `JWTAuthenticationFilter`
based on whether JWTs are enabled to prevent the former intercepting
requests while in stateless mode.
- Removed the `.defaultSuccessUrl("/")` from login configuration as its
inclusion was preventing overriding the use of the
`CustomAuthenticationSuccessHandler` and preventing proper
authentication flows.
---
## Checklist
### General
- [x] I have read the [Contribution
Guidelines](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/CONTRIBUTING.md)
- [x] I have read the [Stirling-PDF Developer
Guide](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/devGuide/DeveloperGuide.md)
(if applicable)
- [x] I have read the [How to add new languages to
Stirling-PDF](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/devGuide/HowToAddNewLanguage.md)
(if applicable)
- [x] I have performed a self-review of my own code
- [x] My changes generate no new warnings
### Documentation
- [x] I have updated relevant docs on [Stirling-PDF's doc
repo](https://github.com/Stirling-Tools/Stirling-Tools.github.io/blob/main/docs/)
(if functionality has heavily changed)
- [x] I have read the section [Add New Translation
Tags](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/devGuide/HowToAddNewLanguage.md#add-new-translation-tags)
(for new translation tags only)
### UI Changes (if applicable)
- [x] Screenshots or videos demonstrating the UI changes are attached
(e.g., as comments or direct attachments in the PR)
<img width="599" height="515" alt="Screenshot 2025-07-10 at 13 35 56"
src="https://github.com/user-attachments/assets/4126b752-ad0d-4ffa-b295-6714c43381e1"
/>
<img width="392" height="376" alt="Screenshot 2025-07-10 at 13 36 10"
src="https://github.com/user-attachments/assets/c681bc43-68ff-4934-8245-d544e2ad7b9c"
/>
<img width="1870" height="986" alt="eb750e8c3954fc47b2dd2e6e76ddb7d5"
src="https://github.com/user-attachments/assets/fca9b23d-b0b6-4884-8a26-98a441b641ef"
/>
<img width="1299" height="702" alt="Screenshot 2025-07-10 at 13 30 57"
src="https://github.com/user-attachments/assets/9415d8bf-fac4-4d38-8c3a-985d043d1076"
/>
### Testing (if applicable)
- [x] I have tested my changes locally. Refer to the [Testing
Guide](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/devGuide/DeveloperGuide.md#6-testing)
for more details.
---------
Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Ludy <Ludy87@users.noreply.github.com>
Co-authored-by: EthanHealy01 <80844253+EthanHealy01@users.noreply.github.com>
Co-authored-by: Ethan <ethan@MacBook-Pro.local>
Co-authored-by: Anthony Stirling <77850077+Frooodle@users.noreply.github.com>
