How does the resource server validate access token?
The access token A resource server validates such a token by making a call to the authorisation server’s introspection endpoint. The token encodes the entire authorisation in itself and is cryptographically protected against tampering. JSON Web Token (JWT) has become the defacto standard for self-contained tokens.
Is JWT opaque?
The opaque token is one kind of token; JWT can be used as another kind of OAuth token that is self-contained. JWT, in contrast, are not opaque. JWT actually contains meta data that can be extracted and interpreted by any bearer that has the token.
What does refresh token mean in OAuth2?
Tokens represent specific scopes and durations of access, granted by the resource owner, and enforced by the resource server and authorization server. Refresh token is issued (along with access token) to the client by the authorization server, and it is used to obtain a new access token when the current access token becomes invalid or expires.
How to validate an OAuth 2.0 access token?
Access token attributes and the methods used to access protected resources are beyond the scope of this specification and are defined by companion specifications. My Authorisation Server has a webservice (SOAP) endpoint that allows the Resource Server to know whether the access_token is valid.
What does the resource server mean in OAuth 2.0?
The resource server is the OAuth 2.0 term for your API server. The resource server handles authenticated requests after the application has obtained an access token. Large scale deployments may have more than one resource server.
When do you need a Bearer Token in OAuth?
If the access token does not allow access to the requested resource, or if there is no access token in the request, then the server must reply with an HTTP 401 response and include a WWW-Authenticate header in the response. The minimum WWW-Authenticate header includes the string Bearer, indicating that a bearer token is required.