Sa-Token is a Java-based authentication and authorization framework designed to manage user sessions, permissions, and identity verification within web applications and microservice architectures. It provides a centralized security layer that enforces access control policies and identity validation across distributed service environments and API gateways.
The framework distinguishes itself through its support for cross-domain single sign-on and its ability to function as an OAuth2 identity provider. It manages user session lifecycles by applying configurable rules for single or multi-login requirements and synchronizes authentication states across multiple servers and independent application instances using external, persistent storage.
Beyond core identity management, the project covers a broad range of security capabilities including role-based access control and interceptor-based enforcement. It integrates with diverse web frameworks through an adapter-based approach, allowing for consistent security enforcement regardless of the underlying application architecture.
