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<?php
require_once "common.php";
session_start();
function getOpenIDURL() {
// Render a default page if we got a submission without an openid
// value.
if (empty($_GET['openid_identifier'])) {
$error = "Expected an OpenID URL.";
include 'index.php';
exit(0);
}
return $_GET['openid_identifier'];
}
function getScheme() {
$scheme = 'http';
if (isset($_SERVER['HTTPS']) and $_SERVER['HTTPS'] == 'on') {
$scheme .= 's';
}
return $scheme;
}
function getReturnTo() {
return sprintf("%s://%s:%s%s/finish_auth.php",
getScheme(), $_SERVER['SERVER_NAME'],
$_SERVER['SERVER_PORT'],
dirname($_SERVER['PHP_SELF']));
}
function getTrustRoot() {
return sprintf("%s://%s:%s%s/",
getScheme(), $_SERVER['SERVER_NAME'],
$_SERVER['SERVER_PORT'],
dirname($_SERVER['PHP_SELF']));
}
function run() {
$openid = getOpenIDURL();
$consumer = getConsumer();
// Begin the OpenID authentication process.
$auth_request = $consumer->begin($openid);
// No auth request means we can't begin OpenID.
if (!$auth_request) {
displayError("Authentication error; not a valid OpenID.");
}
$sreg_request = Auth_OpenID_SRegRequest::build(
// Required
array('nickname'),
// Optional
array('fullname', 'email'));
if ($sreg_request) {
$auth_request->addExtension($sreg_request);
}
// Redirect the user to the OpenID server for authentication.
// Store the token for this authentication so we can verify the
// response.
// For OpenID 1, send a redirect. For OpenID 2, use a Javascript
// form to send a POST request to the server.
if ($auth_request->shouldSendRedirect()) {
$redirect_url = $auth_request->redirectURL(getTrustRoot(),
getReturnTo());
// If the redirect URL can't be built, display an error
// message.
if (Auth_OpenID::isFailure($redirect_url)) {
displayError("Could not redirect to server: " . $redirect_url->message);
} else {
// Send redirect.
header("Location: ".$redirect_url);
}
} else {
// Generate form markup and render it.
$form_id = 'openid_message';
$form_html = $auth_request->formMarkup(getTrustRoot(), getReturnTo(),
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)) {
displayError("Could not redirect to server: " . $form_html->message);
} else {
$page_contents = array(
"<html><head><title>",
"OpenID transaction in progress",
"</title></head>",
"<body onload='document.getElementById(\"".$form_id."\").submit()'>",
$form_html,
"</body></html>");
print implode("\n", $page_contents);
}
}
}
run();
?>
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