server/auth: accept bearer-prefixed auth tokens

[sahilpatel09]

Solves #19752

Basically, when clients pass the token prefixed with string "Bearer " this error is thrown

Error: auth: invalid auth token

as the auth only expects raw token strings. The fix strips the "Bearer " prefix if it is part of the token, making bearer-prefixed tokens authenticate the same way as raw tokens.

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: sahilpatel09
Once this PR has been reviewed and has the lgtm label, please assign serathius for approval. For more information see the Code Review Process.

The full list of commands accepted by this bot can be found here.

Details

Needs approval from an approver in each of these files:

• OWNERS

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment

[k8s-ci-robot]

Hi @sahilpatel09. Thanks for your PR.

I'm waiting for a etcd-io member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work.

Tip

We noticed you've done this a few times! Consider joining the org to skip this step and gain /lgtm and other bot rights. We recommend asking approvers on your previous PRs to sponsor you.

Once the patch is verified, the new status will be reflected by the ok-to-test label.

I understand the commands that are listed here.

Details

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes-sigs/prow repository.

[sahilpatel09]

cc @ahrtr

[ahrtr]

/ok-to-test

cc @fuweid @ivanvc @serathius

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 69.79%. Comparing base (7d330a1) to head (43a4c4e).
⚠️ Report is 24 commits behind head on main.

Additional details and impacted files

Files with missing lines	Coverage Δ
server/auth/store.go	87.11% <100.00%> (ø)

... and 27 files with indirect coverage changes

@@            Coverage Diff             @@
##             main   #21910      +/-   ##
==========================================
- Coverage   69.79%   69.79%   -0.01%     
==========================================
  Files         449      449              
  Lines       38208    38208              
==========================================
- Hits        26667    26666       -1     
- Misses      10114    10115       +1     
  Partials     1427     1427              

---

Continue to review full report in Codecov by Harness.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 7d330a1...43a4c4e. Read the comment docs.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.