From 43d0c82c9c74798ed2d2174159a2e3aa6f957864 Mon Sep 17 00:00:00 2001
From: Evan Prodromou <evan@prodromou.name>
Date: Tue, 17 Jun 2008 10:49:42 -0400
Subject: [PATCH] beginnings of OpenID login

darcs-hash:20080617144942-84dde-a2a1040a42254903a64cff0aae3c1912ed951473.gz
---
 actions/openidlogin.php | 85 +++++++++++++++++++++++++++++++++++++++--
 lib/openid.php          | 40 +++++++++++++++++++
 2 files changed, 121 insertions(+), 4 deletions(-)
 create mode 100644 lib/openid.php

diff --git a/actions/openidlogin.php b/actions/openidlogin.php
index 0a5182a61b..2753f21ab5 100644
--- a/actions/openidlogin.php
+++ b/actions/openidlogin.php
@@ -20,7 +20,7 @@
 if (!defined('LACONICA')) { exit(1); }
 
 class OpenidloginAction extends Action {
-	
+
 	function handle($args) {
 		parent::handle($args);
 		if (common_logged_in()) {
@@ -37,7 +37,7 @@ class OpenidloginAction extends Action {
 		if ($error) {
 			common_element('div', array('class' => 'error'), $error);
 		} else {
-			common_element('div', 'instructions', 
+			common_element('div', 'instructions',
 						   _t('Login with an OpenID account.'));
 		}
 		common_element_start('form', array('method' => 'POST',
@@ -48,10 +48,87 @@ class OpenidloginAction extends Action {
 		common_element_end('form');
 		common_show_footer();
 	}
-	
-	function check_login() {
+
+	function start_openid_login() {
 		# XXX: form token in $_SESSION to prevent XSS
 		# XXX: login throttle
 		$openid_url = $this->trimmed('openid_url');
+		if (!common_valid_http_url($openid_url)) {
+			$this->show_form(_t('OpenID must be a valid URL.'));
+			return;
+		}
+
+		$consumer = oid_consumer();
+
+		if (!$consumer) {
+			common_server_error(_t('Cannot instantiate OpenID consumer object.'));
+			return;
+		}
+
+		common_ensure_session();
+
+		$auth_request = $consumer->begin($openid_url);
+
+		// Handle failure status return values.
+		if (!$auth_request) {
+			$this->show_form(_t('Not a valid OpenID.'));
+			return;
+		} else if (Auth_OpenID::isFailure($auth_request)) {
+			$this->show_form(_t('OpenID failure: ') . $auth_request->message);
+			return;
+		}
+
+		$sreg_request = Auth_OpenID_SRegRequest::build(// Required
+													   array(),
+													   // Optional
+													   array('nickname',
+															 'email',
+															 'fullname',
+															 'language',
+															 'timezone',
+															 'postcode',
+															 'country'));
+
+		if ($sreg_request) {
+			$auth_request->addExtension($sreg_request);
+		}
+
+		$trust_root = common_root_url();
+		$process_url = common_local_url('finishopenidlogin');
+
+		if ($auth_request->shouldSendRedirect()) {
+			$redirect_url = $auth_request->redirectURL($trust_root,
+													   $process_url);
+			if (!$redirect_url) {
+			} else if (Auth_OpenID::isFailure($redirect_url)) {
+				$this->show_form(_t('Could not redirect to server: ') . $redirect_url->message);
+				return;
+			} else {
+				common_redirect($redirect_url);
+			}
+		} else {
+			// Generate form markup and render it.
+			$form_id = 'openid_message';
+			$form_html = $auth_request->formMarkup($trust_root, $process_url,
+												   false, array('id' => $form_id));
+
+			// Display an error if the form markup couldn't be generated;
+			// otherwise, render the HTML.
+			if (Auth_OpenID::isFailure($form_html)) {
+				$this->show_form(_t('Could not create OpenID form: ') . $form_html->message);
+			} else {
+				common_show_header(_t('OpenID Auto-Submit'));
+				common_element('p', 'instructions',
+							   _t('This form should automatically submit itself. '.
+								  'If not, click the submit button to go to your '.
+								  'OpenID provider.'));
+				common_raw($form_html);
+				common_element('script', NULL,
+							   '$(document).ready(function() { ' .
+							   '    $("#'. $form_id .'").submit(); '.
+							   '}');
+				common_show_footer();
+			}
+		}
 	}
 }
diff --git a/lib/openid.php b/lib/openid.php
new file mode 100644
index 0000000000..2485976eed
--- /dev/null
+++ b/lib/openid.php
@@ -0,0 +1,40 @@
+<?php
+/*
+ * Laconica - a distributed open-source microblogging tool
+ * Copyright (C) 2008, Controlez-Vous, Inc.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+if (!defined('LACONICA')) { exit(1); }
+
+require_once('Auth/OpenID/Consumer.php');
+require_once('Auth/OpenID/MySQLStore.php');
+
+function oid_store() {
+    static $store = NULL;
+	if (!$store) {
+		# Can't be called statically
+		$user = new User();
+		$conn = $user->getDatabaseConnection();
+		$store = new Auth_OpenID_SQLStore($conn);
+	}
+	return $store;
+}
+
+function oid_consumer() {
+	$store = oid_store();
+	$consumer = Auth_OpenID_Consumer($store);
+	return $consumer;
+}
\ No newline at end of file