Research and doc authenticate-client API endpoint

[iansk]

• [ ] Determine and doc exactly how this flow works.
• [ ] Doc the requirements for the certificate (which fields are used for auth)
• [ ] Reproduce the flow on Linux. @pfox1969 Has a PowerShell script that works on Linux, and depends on the certificate manager feature (certmgr.msc).
• [ ] Example should show (1) getting the token (2) Calling an endpoint with the token, e.g. image scan reports

[sgordon46]

@iansk Here are my steps for generating a cert and using it for auth. https://gist.github.com/sgordon46/3ddf4eb8c8e6ee263248f6eb0a9df5a0

[iansk]

@sgordon46 You're awesome!! Thank you :)

[KICKdesigns]

@iansk @sgordon46 I wasn't able to get the steps fully working. I tried installing LDAP first as described in this article: https://www.techrepublic.com/article/how-to-install-openldap-on-ubuntu-18-04/ but wasn't able to successfully complete those steps either (the credentials fail when trying to call ldapadd).

In any case, I think what we have in the current /authenticate-client/post.md file is still correct - just can't verify the response from the POST example.

Is there anything else you want in the post.md file?

[iansk]

Thanks, @KICKdesigns The post.md file looks fine to me. Nothing else is required.