JWT authentication for REST client

[IvanPuntev]

For jwt authentication in my rest client interface I'm currently using custom class that extends the ReactiveClientHeadersFactory and manually building the access token in it. What is the proper way in quarkus 3 to do that? Is it possible to be as simple as the OIDC - you just add annotation @RegisterProvider(OidcClientRequestReactiveFilter.class) to the rest client and add some config properties?

quarkus.oidc-client.auth-server-url=
quarkus.oidc-client.client-id=
quarkus.oidc-client.credentials.secret=
quarkus.oidc-client.grant.type=
quarkus.oidc-client.discovery-enabled=
quarkus.oidc-client.token-path=
quarkus.oidc-client.grant-options.password.username=
quarkus.oidc-client.grant-options.password.password=

[quarkus-bot[bot]]

/cc @cescoffier (rest-client), @geoand (rest-client), @sberyozkin (jwt)

[sberyozkin]

@IvanPuntev Right, that should do it, the filter will manage the token acquisition and refresh and will set it as the Authorization: Bearer token.
You can use @OidcClientFilter annotation instead of registering the filter directly

[sberyozkin]

@IvanPuntev I've opened #40078 to track it further, thanks

[sberyozkin]

@IvanPuntev Hopefully it will be a simple PR, please make the new property check first here, https://github.com/quarkusio/quarkus/blob/main/extensions/oidc-common/runtime/src/main/java/io/quarkus/oidc/common/runtime/OidcCommonUtils.java#L332, and if it is set, convert it to Key with this KeyUtils call: try https://github.com/smallrye/smallrye-jwt/blob/main/implementation/jwt-build/src/main/java/io/smallrye/jwt/build/impl/JwtSignatureImpl.java#L262

[IvanPuntev]

Yea, I already did some code investigation and made those changes.

[IvanPuntev]

@sberyozkin This is the pull request #40086. Tell me if something else needs to be added.

[sberyozkin]

@IvanPuntev Sure, I've commented at it, many thanks for this contribution