* Make auth methods pluggable.

* Move httpauth support to a plugin.
* Add an openid plugin to support logging in using OpenID.

1 files changed, 101 insertions, 0 deletions

diff --git a/IkiWiki/Plugin/openid.pm b/IkiWiki/Plugin/openid.pm
new file mode 100644
index 000000000..55b1c4b17
--- /dev/null
+++ b/IkiWiki/Plugin/openid.pm
@@ -0,0 +1,101 @@
+#!/usr/bin/perl
+# OpenID support.
+package IkiWiki::Plugin::openid;
+
+use warnings;
+use strict;
+use IkiWiki;
+
+sub import { #{{{
+	hook(type => "checkconfig", id => "smiley", call => \&checkconfig);
+	hook(type => "auth", id => "skeleton", call => \&auth);
+} # }}}
+
+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 ($$) { #{{{
+	my $q=shift;
+	my $session=shift;
+
+	if (defined $q->param('openid.mode')) {
+		my $csr=getobj($q, $session);
+
+		if (my $setup_url = $csr->user_setup_url) {
+			IkiWiki::redirect($q, $setup_url);
+		}
+		elsif ($csr->user_cancel) {
+			IkiWiki::redirect($q, $config{url});
+		}
+		elsif (my $vident = $csr->verified_identity) {
+			$session->param(name => $vident->url);
+		}
+	}
+} #}}}
+
+sub validate ($$$$) { #{{{
+	my $q=shift;
+	my $session=shift;
+	my $form=shift;
+	my $openid_url=shift;
+
+	my $csr=getobj($q, $session);
+
+	my $claimed_identity = $csr->claimed_identity($openid_url);
+	if (! $claimed_identity) {
+		# Put the error in the form and fail validation.
+		$form->field(name => "openid_url", comment => $csr->err);
+		return 0;
+	}
+	my $check_url = $claimed_identity->check_url(
+		return_to => IkiWiki::cgiurl(
+			do => $form->field("do"),
+			page => $form->field("page"),
+			title => $form->field("title"),
+			from => $form->field("from"),
+			subpage => $form->field("subpage")
+		),
+		trust_root => $config{cgiurl},
+		delayed_return => 1,
+	);
+	# Redirect the user to the OpenID server, which will
+	# eventually bounce them back to auth() above.
+	IkiWiki::redirect($q, $check_url);
+	exit 0;
+} #}}}
+
+sub getobj ($$) { #{{{
+	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},
+	);
+} #}}}
+
+1