path: root/IkiWiki/Plugin/openid.pm

#!/usr/bin/perl
# OpenID support.
package IkiWiki::Plugin::openid;

use warnings;
use strict;
use IkiWiki;

sub import { #{{{
    hook(type => "getopt", id => "openid", call => \&getopt);
    hook(type => "checkconfig", id => "openid", call => \&checkconfig);
    hook(type => "auth", id => "openid", call => \&auth);
} # }}}

sub getopt () { #{{{
    eval q{use Getopt::Long};
    error($@) if $@;
    Getopt::Long::Configure('pass_through');
    GetOptions("openidsignup=s" => \$config{openidsignup});
} #}}}

sub checkconfig () { #{{{
    # Currently part of the OpenID code is in CGI.pm, and is enabled by
    # this setting.
    # TODO: modularise it all out into this plugin..
    $config{openid}=1;
} #}}}

sub auth ($$) { #{{{
    my $q=shift;
    my $session=shift;

    if (defined $q->param('openid.mode')) {
        my $csr=getobj($q, $session);

        if (my $setup_url = $csr->user_setup_url) {
            IkiWiki::redirect($q, $setup_url);
        }
        elsif ($csr->user_cancel) {
            IkiWiki::redirect($q, $config{url});
        }
        elsif (my $vident = $csr->verified_identity) {
            $session->param(name => $vident->url);
        }
        else {
            error("OpenID failure: ".$csr->err);
        }
    }
    elsif (defined $q->param('openid_identifier')) {
        validate($q, $session, $q->param('openid_identifier'));
    }
} #}}}

sub validate ($$$;$) { #{{{
    my $q=shift;
    my $session=shift;
    my $openid_url=shift;
    my $form=shift;

    my $csr=getobj($q, $session);

    my $claimed_identity = $csr->claimed_identity($openid_url);
    if (! $claimed_identity) {
        if ($form) {
            # Put the error in the form and fail validation.
            $form->field(name => "openid_url", comment => $csr->err);
            return 0;
        }
        else {
            error($csr->err);
        }
    }

    my $check_url = $claimed_identity->check_url(
        return_to => IkiWiki::cgiurl(do => "postsignin"),
        trust_root => $config{cgiurl},
        delayed_return => 1,
    );
    # Redirect the user to the OpenID server, which will
    # eventually bounce them back to auth() above.
    IkiWiki::redirect($q, $check_url);
    exit 0;
} #}}}

sub getobj ($$) { #{{{
    my $q=shift;
    my $session=shift;

    eval q{use Net::OpenID::Consumer};
    error($@) if $@;

    my $ua;
    eval q{use LWPx::ParanoidAgent};
    if (! $@) {
        $ua=LWPx::ParanoidAgent->new;
    }
    else {
            $ua=LWP::UserAgent->new;
    }

    # Store the secret in the session.
    my $secret=$session->param("openid_secret");
    if (! defined $secret) {
        $secret=$session->param(openid_secret => time);
    }

    return Net::OpenID::Consumer->new(
        ua => $ua,
        args => $q,
        consumer_secret => $secret,
        required_root => $config{cgiurl},
    );
} #}}}

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