Reactive implementation for DPoPAuthenticationProvider & related classes

[RyanW02]

Expected Behavior

We would like to be able to use DPoP authentication with WebFlux.

Current Behavior

There is no implementation for DPoP authentication for WebFlux.

Context

Feature request: We would like to use DPoP authentication with Spring Cloud Gateway (WebFlux version), however all of the DPoP classes such as DPoPAuthenticationProvider and DPoPAuthenticationConfigurer only support WebMVC / non-reactive.

[jgrandja]

@RyanW02 This won't make it into 6.5 release but I've scheduled it for the next release 7.0.

[franticticktick]

Hi @jgrandja I can take this ticket into work in 6.5 release.

[jgrandja]

Thank you @franticticktick. I'll assign the ticket to you.

RC1 is scheduled for this coming Monday April 21st and I don't have time to review the PR this week as I have higher priority items I'm currently working on. This will need to wait for 7.0.