aspnetcore-authorization

Policy-based authorization in ASP.NET Core minimal APIs is implemented by defining customizable requirements and handlers, then applying safe defaults at the endpoint or group level to protect routes without relying on hard-coded roles.

Resource-based authorization uses IAuthorizationService to evaluate per-resource access decisions, passing both the user and the specific resource to custom handlers to enforce precise access control rather than broad role checks.

Scope-based and claims-based checks for APIs using IdentityServer are configured during startup by defining OAuth/OIDC policies that validate scopes and claims, enforcing separation between authentication and authorization.

Custom authorization handlers are fully supported across ASP.NET Core Razor Pages and controllers, allowing you to register policy definitions and apply them via attributes or explicit checks to secure endpoints consistently.

Avoiding hard-coded roles in ASP.NET Core authorization ensures flexible, maintainable access control by shifting to policy-based and claims-based logic that adapts to changing requirements without modifying application code.

ASP.NET Core authorization supports OpenID Connect for endpoint protection by integrating OIDC authentication with policy and scope-based authorization to establish secure defaults across APIs and web apps.