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What is MSAL and How Does It Work? - Keyhole Software
Excerpt
### Downsides and Limitations Despite its many advantages, MSAL is not without its limitations. Understanding the source of authentication is crucial, and MSAL may not suit all architectures, especially those heavily reliant on microservices. Furthermore, while MSAL excels in managing authentication and authorization, it does not fully address access control issues—specifically, whether a user should have access to certain functions or data within an application. ### Strategies for Using MSAL Effectively To maximize the benefits of MSAL, developers should consider the following strategies: - Clearly understand the authentication needs of your application to choose the right authentication method offered by MSAL. - Work closely with your IT department to manage claims and tokens effectively, especially if modifications are required that MSAL does not natively support.
Related Pain Points
Blurred distinction between OAuth authentication and authorization
6OAuth 2.0 is fundamentally for authorization (permissions), not authentication (identity), but developers frequently misuse it for authentication. This conceptual confusion leads to security vulnerabilities and architectural mistakes that compound during production rollouts.
MSAL lacks fine-grained access control and authorization
5MSAL focuses primarily on authentication and token issuance but does not fully address access control issues or implement role-based and feature-level access control within applications. Developers must build custom authorization logic.
MSAL unsuitable for decentralized microservices architectures
5MSAL is not well-suited for complex microservices environments with decentralized identity requirements. Its centralized authentication approach doesn't map well to distributed systems where each service manages its own identity.
Conditional Access and claims challenge handling requires manual implementation
5Developers must manually implement retry policies and claims challenge handling for Conditional Access scenarios in MSAL. Silent token acquisition can fail with claims challenges that require interactive re-acquisition, and HTTP errors (429, 500-600) need custom retry logic.