NAME
    Web::ID - implementation of WebID (a.k.a. FOAF+SSL)

SYNOPSIS
     my $webid = Web::ID->new(certificate => $pem_encoded_x509);
     if ($webid->valid)
     {
       say "Authenticated as: ", $webid->uri;
     }

DESCRIPTION
    WebID is a simple authentication protocol based on TLS (Transaction Layer
    Security, better known as Secure Socket Layer, SSL) and the Semantic Web.
    This module provides a Perl implementation for authenticating clients
    using WebID.

    For more information see the Web::ID::FAQ document.

    Bundled with this module are Plack::Middleware::Auth::WebID, a plugin for
    Plack to perform WebID authentication on HTTPS connections; and
    Web::ID::Certificate::Generator, a module that allows you to generate
    WebID-enabled certificates that can be installed into web browsers.

  Constructor
    `new`
        Standard Moose-style constructor.

  Attributes
    `certificate`
        A Web::ID::Certificate object representing and x509 certificate,
        though a PEM-encoded string will be coerced.

        This is usually the only attribute you want to pass to the
        constructor. Allow the others to be built automatically.

    `first_valid_san`
        Probably fairly uninteresting. This is the first subjectAltName value
        found in the certificate that could be successfully authenticated
        using Web::ID. An Web::ID::SAN object.

    `uri`
        The URI associated with the first valid SAN. A URI object.

        This is a URI you can use to identify the person, organisation or
        robotic poodle holding the certificate.

    `profile`
        Data about the certificate holder. An RDF::Trine::Model object. Their
        FOAF file (probably).

    `valid`
        Boolean.

  Methods
    `node`
        Returns the same as `uri`, but as an RDF::Trine::Node object.

    `get(@predicates)`
        Queries the `profile` for triples of the form:

          $self->node $predicate $x .

        And returns literal and URI values for $x, as strings.

        $predicate should be an RDF::Trine::Node, or a string. If a string, it
        will be expanded using RDF::Trine::NamespaceMap, so you can do stuff
        like:

          my $name   = $webid->get('foaf:name', 'rdfs:label');
          my @mboxes = $webid->get('foaf:mbox');

BUGS
    Please report any bugs to
    <http://rt.cpan.org/Dist/Display.html?Queue=Web-ID>.

SEE ALSO
    Web::ID::FAQ.

    Web::ID::Certificate, Plack::Middleware::Auth::WebID.

    RDF::ACL provides an access control system that complements WebID.

    CGI::Auth::FOAF_SSL is the spiritual ancestor of this module though they
    share very little code, and have quite different APIs.

    General WebID information: <http://webid.info/>,
    <http://www.w3.org/wiki/WebID>,
    <http://www.w3.org/2005/Incubator/webid/spec/>,
    <http://lists.foaf-project.org/mailman/listinfo/foaf-protocols>.

    Mailing list for general Perl RDF/SemWeb discussion and support:
    <http://www.perlrdf.org/>.

AUTHOR
    Toby Inkster <tobyink@cpan.org>.

THANKS
    Thanks to Kjetil Kjernsmo (cpan:KJETILK) for persuading me to port my old
    CGI-specific implementaton of this to Plack.

    Thanks Kjetil Kjernsmo (again), Florian Ragwitz (cpan:FLORA), and Jonas
    Smedegaard for help with testing and advice on dependencies.

    Thanks to Henry Story, Melvin Carvalho, Simon Reinhardt, Bruno Harbulot,
    Ian Jacobi and many others for developing WebID from a poorly thought out
    idea to a clever, yet simple and practical authentication protocol.

    Thanks to Gregory Williams (cpan:GWILLIAMS), Tatsuhiko Miyagawa
    (cpan:MIYAGAWA) and the Moose Cabal for providing really good platforms
    (RDF::Trine, Plack and Moose respectively) to build this on.

COPYRIGHT AND LICENCE
    This software is copyright (c) 2012 by Toby Inkster.

    This is free software; you can redistribute it and/or modify it under the
    same terms as the Perl 5 programming language system itself.

DISCLAIMER OF WARRANTIES
    THIS PACKAGE IS PROVIDED "AS IS" AND WITHOUT ANY EXPRESS OR IMPLIED
    WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
    MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.