collective.allowsearch is a Plone product that provides an interface and a default adapter to allow users to search the catalog independent of the View permission.
Add this package to your buildout or policy package, or add a ZCML slug for it to your etc/site.zcml.
Simply mark any content which you want to be visible in searches for anonymous users with the IAllowAnonymousSearchMarker interface.
This can be done programmatically or using ZCML like:
< include package="collective.allowsearch" / >
EXAMPLE: Allow all ATDocument objects to be found by Anonymous users.
NOTE: This does _NOT_ change the View permissions in any way.
< /configure >
That's it. See the package's doctest for more information.
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