<?php

ini_set('display_errors', 1);
ini_set('display_startup_errors', 1);
error_reporting(E_ALL);
require_once dirname(__FILE__) . '/vendor/autoload.php';

// examples/how_to_make_response.php
function buildSAMLResponse()
{
    $destination = 'https://theSPendPoint/';
    $issuer = 'localhost';

    $response = new \LightSaml\Model\Protocol\Response();
    $response->addAssertion($assertion = new \LightSaml\Model\Assertion\Assertion());
    $response->setID(\LightSaml\Helper::generateID());
    $response->setIssueInstant(new \DateTime());
    $response->setDestination($destination);
    $response->setIssuer(new \LightSaml\Model\Assertion\Issuer($issuer));
    $response->setStatus(new \LightSaml\Model\Protocol\Status(new \LightSaml\Model\Protocol\StatusCode('urn:oasis:names:tc:SAML:2.0:status:Success')));

    $email = 'MYEMAIL';
    $name = 'MYNAME';

    $assertion->setId(\LightSaml\Helper::generateID());
    $assertion->setIssueInstant(new \DateTime());
    $assertion->setIssuer(new \LightSaml\Model\Assertion\Issuer($issuer));
    $assertion->setSubject(
        (new \LightSaml\Model\Assertion\Subject())
            ->setNameID(new \LightSaml\Model\Assertion\NameID('email.domain.com', \LightSaml\SamlConstants::NAME_ID_FORMAT_EMAIL))
            ->addSubjectConfirmation(
                (new \LightSaml\Model\Assertion\SubjectConfirmation())
                    ->setMethod(\LightSaml\SamlConstants::CONFIRMATION_METHOD_BEARER)
                    ->setSubjectConfirmationData(
                        (new \LightSaml\Model\Assertion\SubjectConfirmationData())
                            ->setNotOnOrAfter(new \DateTime('+1 MINUTE'))
                            ->setRecipient($destination)
                    )
            )
    );
    $assertion->setConditions(
        (new \LightSaml\Model\Assertion\Conditions())
            ->setNotBefore(new \DateTime())
            ->setNotOnOrAfter(new \DateTime('+1 MINUTE'))
            ->addItem(
                new \LightSaml\Model\Assertion\AudienceRestriction([$destination])
            )
    );
    $assertion->addItem(
        (new \LightSaml\Model\Assertion\AttributeStatement())
            ->addAttribute(new \LightSaml\Model\Assertion\Attribute(
                \LightSaml\ClaimTypes::EMAIL_ADDRESS,
                $email
            ))
            ->addAttribute(new \LightSaml\Model\Assertion\Attribute(
                \LightSaml\ClaimTypes::COMMON_NAME,
                $name
            ))
    );
    $assertion->addItem(
        (new \LightSaml\Model\Assertion\AuthnStatement())
            ->setAuthnInstant(new \DateTime('-10 MINUTE'))
            ->setSessionIndex('_some_session_index')
            ->setAuthnContext(
                (new \LightSaml\Model\Assertion\AuthnContext())
                    ->setAuthnContextClassRef(\LightSaml\SamlConstants::AUTHN_CONTEXT_PASSWORD_PROTECTED_TRANSPORT)
            )
    );

    $certificate = \LightSaml\Credential\X509Certificate::fromFile(__DIR__ . '/saml.crt');
    $privateKey = \LightSaml\Credential\KeyHelper::createPrivateKey(__DIR__ . '/saml.pem', '', true);

    $response->setSignature(new \LightSaml\Model\XmlDSig\SignatureWriter($certificate, $privateKey));

    $context = new LightSaml\Model\Context\SerializationContext();
    $response->serialize($context->getDocument(), $context);
    $context->getDocument()->formatOutput = true;
    $xml = $context->getDocument()->saveXML();

    return $xml;

}

//DISPLAY IT
echo "<script>var observe;
if (window.attachEvent) {
    observe = function (element, event, handler) {
        element.attachEvent('on'+event, handler);
    };
}
else {
    observe = function (element, event, handler) {
        element.addEventListener(event, handler, false);
    };
}
function init () {
    var text = document.getElementById('text');
    function resize () {
        text.style.height = 'auto';
        text.style.height = text.scrollHeight+'px';
    }
    /* 0-timeout to get the already changed text */
    function delayedResize () {
        window.setTimeout(resize, 0);
    }
    observe(text, 'change',  resize);
    observe(text, 'cut',     delayedResize);
    observe(text, 'paste',   delayedResize);
    observe(text, 'drop',    delayedResize);
    observe(text, 'keydown', delayedResize);

    text.focus();
    text.select();
    resize();
}</script>";
echo '<style>textarea {
    border: 0 none white;
    overflow: hidden;
    padding: 0;
    outline: none;
    background-color: #D0D0D0;
}</style>';
echo '<body onload="init();">';
$samlResponse = buildSAMLResponse();
echo '<textarea rows="1" style="height:1em;width: 100%;" id="text">';

echo $samlResponse;
echo '</textarea>';

echo base64_encode($samlResponse);
echo '<br>&nbsp;';
echo '</body>';