criztovyl/changemail.php

## changemail.php
<?php
// Config

// Der Server auf dem dein Uberspace läuft
$server = '';

// Dein Nutzername
$username = '';

// Für aufgeschaltete Domains
// Bsp: Wenn "petrasblog.de" im Namensraum "blog" liegt:
//   $display = 'petrasblog.de';
//   $namespace = 'blog';
$display = '';
$namespace = '';

// Config End

// Checks whether current password is correct
// returns true/false
function setNewPassword($strMailbox, $strPassword)
{
    $strPassword = utf8_decode($strPassword);
    $strCommand = 'vpasswd ' . escapeshellarg($strMailbox);

    $descriptorspec = array(
        0 => array("pipe", "r")
    );

    $process = proc_open($strCommand, $descriptorspec, $pipes, NULL, NULL);

    if(is_resource($process)) {
        fwrite($pipes[0], $strPassword);
        fclose($pipes[0]);
        $return_value = proc_close($process);
        if($return_value == 0) {
            return true;
        }
    }

    return false;
}

// Enforce https
if($_SERVER["HTTPS"] != "on") {
    header("HTTP/1.1 301 Moved Permanently");
    header("Location: https://" . $_SERVER["SERVER_NAME"] . $_SERVER["REQUEST_URI"]);
    exit();
}

// Init variables
$changed = false;
$success = false;

$domain = sprintf("%s.%s.uberspace.de", $username, $server);
$display = $display == '' ? $domain : $display;

// Construct part before "@"
// if namespace is given "[namespace]-name" else "name"
$name = sprintf("%s%s%s", $namespace, $namespace == '' ? '' : '-', $_POST['mail']);

$password = $_POST['oldpw'];
$newpw = $_POST['newpw'];

if( isset($name) && isset($password) && isset($newpw) ) {

    $changed = true;

    // Test password
    $mbox = @imap_open("{localhost:993/imap/ssl/novalidate-cert}", $name.'@'.$domain, $password);
    if($mbox != false) {
        $success = setNewPassword($name, $newpw);
    }
    else $success = false;
}
?>
<!DOCTYPE html>
<html>
    <head>
        <meta charset="utf-8">
        <meta http-equiv="X-UA-Compatible" content="IE=edge">
        <meta name="viewport" content="width=device-width, initial-scale=1">
        <!-- Latest compiled and minified CSS -->
        <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" integrity="sha384-BVYiiSIFeK1dGmJRAkycuHAHRg32OmUcww7on3RYdg4Va+PmSTsz/K68vbdEjh4u" crossorigin="anonymous">

        <!-- Optional theme -->
        <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap-theme.min.css" integrity="sha384-rHyoN1iRsVXV4nD0JutlnGaslCJuC7uwjduW9SVrLvRYooPp2bWYgmgJQIXwl/Sp" crossorigin="anonymous">
        <title>Mail-Passwort ändern</title>
        <meta charset="utf-8">
        <style>
.success {
    color: green;
}
.failure {
    color: red;
}
        </style>
    </head>

    <body>
        <div class="container-fluid">
            <div class="row">
                <div class="col-md-6 col-md-offset-3">
                    <h2>Mail-Passwort ändern</h2>
                    <?php if($changed): ?>
                    <p class="<?php echo $success ? 'success' : 'failure'; ?>"><?php echo $success ? 'Passwort geändert.' : 'Ändern fehlgeschlagen (Falsches Passwort?)'; ?></p>
                    <?php endif; ?>
                    <form method="POST">
                        <label for="mail">Mail</label>
                        <div class="input-group">
                            <input class="form-control" type="text" name="mail"> <span class="input-group-addon">@<?php echo $display;?></span>
                        </div>

                        <label for="oldpw">Altes Passwort</label>
                        <input class="form-control" type="password" name="oldpw">

                        <label for="newpw">Neues Passwort</label>
                        <input class="form-control" type="password" name="newpw">

                        <input class="form-control" type="submit" value="Ändern">
                    </form>
                    Based on <a href="https://gist.github.com/nichdu/9047330">changemail.php</a> by user Tjark 'nichdu' Saul.
                </div>
            </div>
        </div>
    </body>
</html>
	<?php
	// Config

	// Der Server auf dem dein Uberspace läuft
	$server = '';

	// Dein Nutzername
	$username = '';

	// Für aufgeschaltete Domains
	// Bsp: Wenn "petrasblog.de" im Namensraum "blog" liegt:
	// $display = 'petrasblog.de';
	// $namespace = 'blog';
	$display = '';
	$namespace = '';

	// Config End

	// Checks whether current password is correct
	// returns true/false
	function setNewPassword($strMailbox, $strPassword)
	{
	$strPassword = utf8_decode($strPassword);
	$strCommand = 'vpasswd ' . escapeshellarg($strMailbox);

	$descriptorspec = array(
	0 => array("pipe", "r")
	);

	$process = proc_open($strCommand, $descriptorspec, $pipes, NULL, NULL);

	if(is_resource($process)) {
	fwrite($pipes[0], $strPassword);
	fclose($pipes[0]);
	$return_value = proc_close($process);
	if($return_value == 0) {
	return true;
	}
	}

	return false;
	}

	// Enforce https
	if($_SERVER["HTTPS"] != "on") {
	header("HTTP/1.1 301 Moved Permanently");
	header("Location: https://" . $_SERVER["SERVER_NAME"] . $_SERVER["REQUEST_URI"]);
	exit();
	}

	// Init variables
	$changed = false;
	$success = false;

	$domain = sprintf("%s.%s.uberspace.de", $username, $server);
	$display = $display == '' ? $domain : $display;

	// Construct part before "@"
	// if namespace is given "[namespace]-name" else "name"
	$name = sprintf("%s%s%s", $namespace, $namespace == '' ? '' : '-', $_POST['mail']);

	$password = $_POST['oldpw'];
	$newpw = $_POST['newpw'];

	if( isset($name) && isset($password) && isset($newpw) ) {

	$changed = true;

	// Test password
	$mbox = @imap_open("{localhost:993/imap/ssl/novalidate-cert}", $name.'@'.$domain, $password);
	if($mbox != false) {
	$success = setNewPassword($name, $newpw);
	}
	else $success = false;
	}
	?>
	<!DOCTYPE html>
	<html>
	<head>
	<meta charset="utf-8">
	<meta http-equiv="X-UA-Compatible" content="IE=edge">
	<meta name="viewport" content="width=device-width, initial-scale=1">
	<!-- Latest compiled and minified CSS -->
	<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" integrity="sha384-BVYiiSIFeK1dGmJRAkycuHAHRg32OmUcww7on3RYdg4Va+PmSTsz/K68vbdEjh4u" crossorigin="anonymous">

	<!-- Optional theme -->
	<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap-theme.min.css" integrity="sha384-rHyoN1iRsVXV4nD0JutlnGaslCJuC7uwjduW9SVrLvRYooPp2bWYgmgJQIXwl/Sp" crossorigin="anonymous">
	<title>Mail-Passwort ändern</title>
	<meta charset="utf-8">
	<style>
	.success {
	color: green;
	}
	.failure {
	color: red;
	}
	</style>
	</head>

	<body>
	<div class="container-fluid">
	<div class="row">
	<div class="col-md-6 col-md-offset-3">
	<h2>Mail-Passwort ändern</h2>
	<?php if($changed): ?>
	<p class="<?php echo $success ? 'success' : 'failure'; ?>"><?php echo $success ? 'Passwort geändert.' : 'Ändern fehlgeschlagen (Falsches Passwort?)'; ?></p>
	<?php endif; ?>
	<form method="POST">
	<label for="mail">Mail</label>
	<div class="input-group">
	<input class="form-control" type="text" name="mail"> <span class="input-group-addon">@<?php echo $display;?></span>
	</div>

	<label for="oldpw">Altes Passwort</label>
	<input class="form-control" type="password" name="oldpw">

	<label for="newpw">Neues Passwort</label>
	<input class="form-control" type="password" name="newpw">

	<input class="form-control" type="submit" value="Ändern">
	</form>
	Based on <a href="https://gist.github.com/nichdu/9047330">changemail.php</a> by user Tjark 'nichdu' Saul.
	</div>
	</div>
	</div>
	</body>
	</html>