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https://issues.apache.org/jira/browse/SOLR-17309?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17933527#comment-17933527
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ASF subversion and git services commented on SOLR-17309:
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Commit a7fdb21cb851a1db7a713f0cad31ff2cf7425476 in solr's branch
refs/heads/branch_9x from Lamine
[ https://gitbox.apache.org/repos/asf?p=solr.git;h=a7fdb21cb85 ]
SOLR-17309: Enhance certificate based authentication plugin with flexible cert
principal resolution (#3029)
---------
Co-authored-by: Lamine Idjeraoui <[email protected]>
Co-authored-by: Eric Pugh <[email protected]>
(cherry picked from commit 9d2118bafb885f983d033c85c8a3accac11c0faa)
> Enhance Cert Authentication plugin with flexible cert principal resolution
> --------------------------------------------------------------------------
>
> Key: SOLR-17309
> URL: https://issues.apache.org/jira/browse/SOLR-17309
> Project: Solr
> Issue Type: Improvement
> Reporter: Lamine
> Priority: Minor
> Labels: pull-request-available
> Fix For: 9.9
>
> Time Spent: 2.5h
> Remaining Estimate: 0h
>
> TL;DR
> This the first part of a broader contribution to enhance CertAuthPlugin to
> support _Principal_ resolution, identity resolution and validation.
> This part deals with _Principal_ resolution.
> —
> Solr supports certificate-based authentication (mTLS) via the CertAuthPlugin.
> However, the feature offers limited flexibility. In fact, the class contains
> minimal code, primarily deferring certificate validation to Jetty and
> extracting the _Principal_ from the subject's Distinguish Name (DN). The
> Authorization plugin then maps the extracted _Principal_ to a role.
> I've identified a couple of issues with this approach, as well as potential
> areas for enhancement:
> *1- Issues with Using DN*
> - {*}Length and precision{*}: The DN is lengthy and requires an exact match
> for roles mapping. Even a minor discrepancy, like an extra space, or order of
> attributes (RDN), can break the mapping.
> - {*}One DN per certificate{*}: If different certificates are used for
> different hosts in a cluster, each DN has to be mapped separately to a
> particular role, complicating role mapping and increasing risks of errors.
> - {*}Not customizable{*}: The current implementation doesn't allow operators
> to adapt the Principal extracting to their specific needs.
> - {*}Bad user experience{*}: When logged into Solr Admin UI using
> CertAuthPlugin the whole DN is displayed on the left menu as the 'username'.
> _*Proposed Solution for DN Issues:*_
> - Extraction flexibility: Grant operators the ability to specify the data
> they wish to extract for the {_}Principal{_}, based on a defined path (for
> example: _SUBJECT.DN_ (default), {_}SAN.URI{_}, {_}SAN.email{_}, etc.).
> - Use of delimiters: Introduce optional delimiters (start and end) or
> prefix/suffix to extract only the necessary data from a field, for example a
> group ID.
> **
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