fix/ecdsa verification to use raw signature format per jwa spec

[ottokruse]

Issue #, if available: N/A

Description of changes: Fixed ES256, ES384 and ES512 implementation: these should use raw signature format (r || s, as per JWA spec) but Node.js uses ASN.1 DER format by default. This can be switched to raw format by providing dsaEncoding: "ieee-p1363" which I added (thanks for the tip @NicolasViaud).

Also discovered that the browser implementation did not support the ECDSA formats at all yet, so added that.

And as icing on the cake, I finally fixed the browser test scrips so it doesn't orphan Vite processes anymore as it sometimes did! 🎉

By submitting this pull request, I confirm that you can use, modify, copy, and redistribute this contribution, under the terms of your choice.

[hakanson]

Looks good - reviewed code, GitHub action output, and did local build/test.

Note: I have a local environmental issue that npm run test:browser fails with a different message using same Vite, Cypress, and Browser as CI.

VITE v5.4.11

  │ Cypress:        13.17.0
  │ Browser:        Electron 118 (headless)
  │ Node Version:   v18.20.2 (/usr/local/bin/node)

  1) click Verify RSA
       invalid JWKS Uri:

      Timed out retrying after 4000ms
      + expected - actual

      -'Error: Failed to fetch /notexample-JWKS.json: Content-type is "text/html", expected "application/json"'
      +'JWKS could not be parsed as JSON'
      
      at Context.eval (webpack://vite-app/./cypress/e2e/forminputs.cy.ts:63:0)

A local cd tests/vite-app/, npm run preview and npm run cypress:open:preview to test via Cypress UI worked fine - so not sure what changes could be made

[ottokruse]

Thanks for reviewing!

Mmmm running that locally works for me. That message about the wrong content type is an old message, so there must be an old version of the lib somewhere locally for you.

You did run "npm run pack-for-tests" first right? And tried nuking all node_modules yet?

[hakanson]

Got it working - removed both node_modules and dist under tests/vite-app the ran a npm run build there.

After that npm run test:browser had no errors.