Retrieve UPN from Bearer Token

[Rubini Omkumar]

Hi,
Is there a way in the library to retrieve the UPN from the Bearer token claims? When I decode the Bearer token, there are many claims available like upn, prefered_name etc. Is there a way to retrieve those?

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Thanks,
Rubini

[Vladimir Dzhuvinov]

Yes.

If the token is opaque or the Authorization server supports introspection:

https://connect2id.com/products/nimbus-oauth-openid-connect-sdk/examples/oauth/token-introspection

If the token is a signed JWT - use the Nimbus JOSE+JWT lib:

https://connect2id.com/products/nimbus-jose-jwt/examples/validating-jwt-access-tokens