Jan Høydahl created SOLR-12799:
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Summary: Allow Authentication Plugins to easily intercept
internode requests
Key: SOLR-12799
URL: https://issues.apache.org/jira/browse/SOLR-12799
Project: Solr
Issue Type: New Feature
Security Level: Public (Default Security Level. Issues are Public)
Components: Authentication
Reporter: Jan Høydahl
Solr security framework currently allows a plugin to declare statically by
implementing the {{HttpClientBuilderPlugin}} interface whether it will handle
internode requests. If it implements the interface, the plugin MUST handle ALL
internode requests, even requests originating from Solr itself. Likewise, if a
plugin does not implement the interface, ALL requests will be authenticated by
the built-in {{PKIAuthenticationPlugin}}.
In some cases (such as SOLR-12121) there is a need to forward end-user
credentials on internode requests, but let PKI handle it for solr-originated
requests. This is currently not possible without a dirty hack where each plugin
duplicates some PKI logic and calls PKI plugin from its own interceptor even if
it is disabled.
This Jira makes this use case officially supported by the framework by:
* Letting {{PKIAuthenticationPlugin}} be always enabled and always register
its interceptor. PKI will now on a per-request first give the authc plugin a
chance to handle the request
* Adding a protected method to abstract class {{AuthenticationPlugin:}}
{code:java}
protected boolean interceptInternodeRequest(HttpRequest httpRequest,
HttpContext httpContext){code}
that can be overridden by plugins in order to easily intercept requests without
registering its own interceptor. Returning 'false' delegates to PKI.
Existing Authc plugins do *not* need to change as a result of this, and they
will work exactly as before, i.e. either handle ALL or NONE internode auth.
New plugins choosing to *override* the new {{interceptInternodeRequest}} method
will obtain per-request control over who will secure each request. The first
user of this feature will be JWT token based auth in SOLR-12121.
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