Fix rust server auth

[cvkem]

To fix #18599

This PR for Rust-Server contains a resolution for issue 18599 (Bearer/oAuth-token parsing missing). The solution also covers api-key and Basic (user-password) authentication.

The bearer, api-key and basic-token parsing are included in the core of the generated code based on a Trait AuthenticationApi. The actual implementation of this Trait is provided by the actual user (injected by user to achieve Inversion of Control (IoC). The example-code (server and client side) has been extended the code that parses the JWT-token and extracts the Scopes from them (server) and client code which creates a Bearer token for testing purpose.

The code check the Signature, the Audience (aud) and the Expiry time (exp) of the Bearer token and provides meaning-full logging on the server-side for the cause of the issue in case of a failure. The client-side only gets the message "unauthorized access".

The code has been tested on an example project to check all output compiles and runs under multiple scenario's.

I would like to ask for a review of someone from the Rust Technical Committee: @frol (2017/07) @farcaller (2017/08) @richardwhiuk (2019/07) @paladinzh (2020/05) @jacob-pro (2022/10)

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[wing328]

https://github.com/OpenAPITools/openapi-generator/actions/runs/9119392437/job/25147922695?pr=18692

can you please take a look at the test failure when you've time?

[cvkem]

Thanks @wing328 for flagging the issue and providing the link with the details. Based on this information I was able to reproduce the issue on my local machine and provide the fix to the template, and double-checked this solves the issue.

I have pushed an update template and included newly generated sample files.

[wing328]

thanks for the PR. let's give it a try