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171
admin/phpMyAdmin/examples/openid.php
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171
admin/phpMyAdmin/examples/openid.php
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<?php
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/**
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* Single signon for phpMyAdmin using OpenID
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*
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* This is just example how to use single signon with phpMyAdmin, it is
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* not intended to be perfect code and look, only shows how you can
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* integrate this functionality in your application.
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*
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* It uses OpenID pear package, see https://pear.php.net/package/OpenID
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*
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* User first authenticates using OpenID and based on content of $AUTH_MAP
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* the login information is passed to phpMyAdmin in session data.
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*/
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declare(strict_types=1);
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if (false === @include_once 'OpenID/RelyingParty.php') {
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exit;
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}
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/* Change this to true if using phpMyAdmin over https */
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$secure_cookie = false;
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/**
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* Map of authenticated users to MySQL user/password pairs.
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*/
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$AUTH_MAP = [
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'https://launchpad.net/~username' => [
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'user' => 'root',
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'password' => '',
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],
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];
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// phpcs:disable PSR1.Files.SideEffects,Squiz.Functions.GlobalFunction
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/**
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* Simple function to show HTML page with given content.
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*
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* @param string $contents Content to include in page
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*/
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function Show_page($contents): void
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{
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header('Content-Type: text/html; charset=utf-8');
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echo '<?xml version="1.0" encoding="utf-8"?>' . "\n";
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echo '<!DOCTYPE HTML>
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<html lang="en" dir="ltr">
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<head>
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<link rel="icon" href="../favicon.ico" type="image/x-icon">
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<link rel="shortcut icon" href="../favicon.ico" type="image/x-icon">
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<meta charset="utf-8">
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<title>phpMyAdmin OpenID signon example</title>
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</head>
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<body>';
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if (isset($_SESSION['PMA_single_signon_error_message'])) {
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echo '<p class="error">' . $_SESSION['PMA_single_signon_message'] . '</p>';
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unset($_SESSION['PMA_single_signon_message']);
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}
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echo $contents;
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echo '</body></html>';
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}
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/**
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* Display error and exit
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*
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* @param Exception $e Exception object
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*/
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function Die_error($e): void
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{
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$contents = "<div class='relyingparty_results'>\n";
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$contents .= '<pre>' . htmlspecialchars($e->getMessage()) . "</pre>\n";
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$contents .= "</div class='relyingparty_results'>";
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Show_page($contents);
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exit;
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}
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// phpcs:enable
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/* Need to have cookie visible from parent directory */
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session_set_cookie_params(0, '/', '', $secure_cookie, true);
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/* Create signon session */
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$session_name = 'SignonSession';
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session_name($session_name);
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@session_start();
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// Determine realm and return_to
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$base = 'http';
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if (isset($_SERVER['HTTPS']) && $_SERVER['HTTPS'] === 'on') {
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$base .= 's';
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}
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$base .= '://' . $_SERVER['SERVER_NAME'] . ':' . $_SERVER['SERVER_PORT'];
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$realm = $base . '/';
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$returnTo = $base . dirname($_SERVER['PHP_SELF']);
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if ($returnTo[strlen($returnTo) - 1] !== '/') {
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$returnTo .= '/';
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}
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$returnTo .= 'openid.php';
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/* Display form */
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if ((! count($_GET) && ! count($_POST)) || isset($_GET['phpMyAdmin'])) {
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/* Show simple form */
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$content = '<form action="openid.php" method="post">
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OpenID: <input type="text" name="identifier"><br>
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<input type="submit" name="start">
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</form>';
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Show_page($content);
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exit;
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}
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/* Grab identifier */
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$identifier = null;
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if (isset($_POST['identifier']) && is_string($_POST['identifier'])) {
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$identifier = $_POST['identifier'];
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} elseif (isset($_SESSION['identifier']) && is_string($_SESSION['identifier'])) {
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$identifier = $_SESSION['identifier'];
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}
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/* Create OpenID object */
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try {
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$o = new OpenID_RelyingParty($returnTo, $realm, $identifier);
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} catch (Throwable $e) {
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Die_error($e);
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}
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/* Redirect to OpenID provider */
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if (isset($_POST['start'])) {
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try {
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$authRequest = $o->prepare();
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} catch (Throwable $e) {
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Die_error($e);
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}
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$url = $authRequest->getAuthorizeURL();
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header('Location: ' . $url);
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exit;
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}
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/* Grab query string */
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if (! count($_POST)) {
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[, $queryString] = explode('?', $_SERVER['REQUEST_URI']);
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} else {
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// Fetch the raw query body
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$queryString = file_get_contents('php://input');
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}
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/* Check reply */
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try {
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$message = new OpenID_Message($queryString, OpenID_Message::FORMAT_HTTP);
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} catch (Throwable $e) {
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Die_error($e);
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}
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$id = $message->get('openid.claimed_id');
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if (empty($id) || ! isset($AUTH_MAP[$id])) {
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Show_page('<p>User not allowed!</p>');
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exit;
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}
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$_SESSION['PMA_single_signon_user'] = $AUTH_MAP[$id]['user'];
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$_SESSION['PMA_single_signon_password'] = $AUTH_MAP[$id]['password'];
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$_SESSION['PMA_single_signon_HMAC_secret'] = hash('sha1', uniqid(strval(random_int(0, mt_getrandmax())), true));
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session_write_close();
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/* Redirect to phpMyAdmin (should use absolute URL here!) */
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header('Location: ../index.php');
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