This project is a PHP library for implementing a spec-compliant OAuth 2.0 authorization server. It serves as an authentication framework for managing user identities and client authorizations, providing the necessary components to issue and validate access and refresh tokens.
The server supports a wide range of standardized authorization flows, including authorization code exchange, device grants, implicit flows, and PKCE enforcement. It handles complex token lifecycles through refresh token rotation, scope management, and the use of asymmetric keys for signing digital tokens.
The system provides comprehensive API access control and resource protection by verifying bearer tokens and authorization headers. It employs a repository-pattern for data persistence and provides interfaces to decouple authorization entities from specific database backends.
Integration is achieved through standardized request and response interfaces that connect the authorization server logic to web frameworks.