SAML 2.0 Node.js Helpers

saml2-js is a Node.js module that simplifies the implementation of the SAML 2.0 protocol, specifically for acting as a Service Provider (SP). It abstracts away complexities, allowing applications to integrate with Identity Providers (IdPs) for authentication and authorization. The library currently does not support acting as an Identity Provider. As of version 4.0.4, the project is in maintenance mode, focusing primarily on addressing bug reports and security issues rather than feature development. There is no stated regular release cadence, with updates being driven by critical fixes. Key differentiators include its focus solely on SP functionality and a clear set of configuration options for managing SAML requests and responses. It offers constructors for `ServiceProvider` and `IdentityProvider` objects, with options for managing entity IDs, cryptographic keys, assertion endpoints, and various SAML-specific behaviors like `force_authn` and `nameid_format`.