SAMLBuilder.php

<?php


/**
 * Class for generating SAML 2.0 metadata from SimpleSAMLphp metadata arrays.
 *
 * This class builds SAML 2.0 metadata for an entity by examining the metadata for the entity.
 *
 * @package SimpleSAMLphp
 */
class SimpleSAML_Metadata_SAMLBuilder
{


    /**
     * The EntityDescriptor we are building.
     *
     * @var \SAML2\XML\md\EntityDescriptor
     */
    private $entityDescriptor;


    /**
     * The maximum time in seconds the metadata should be cached.
     *
     * @var int|null
     */
    private $maxCache = null;


    /**
     * The maximum time in seconds since the current time that this metadata should be considered valid.
     *
     * @var int|null
     */
    private $maxDuration = null;


    /**
     * Initialize the SAML builder.
     *
     * @param string   $entityId The entity id of the entity.
     * @param double|null $maxCache The maximum time in seconds the metadata should be cached. Defaults to null
     * @param double|null $maxDuration The maximum time in seconds this metadata should be considered valid. Defaults
     * to null.
     */
    public function __construct($entityId, $maxCache = null, $maxDuration = null)
    {
        assert(is_string($entityId));

        $this->maxCache = $maxCache;
        $this->maxDuration = $maxDuration;

        $this->entityDescriptor = new \SAML2\XML\md\EntityDescriptor();
        $this->entityDescriptor->entityID = $entityId;
    }


    private function setExpiration($metadata)
    {
        if (array_key_exists('expire', $metadata)) {
            if ($metadata['expire'] - time() < $this->maxDuration) {
                $this->maxDuration = $metadata['expire'] - time();
            }
        }

        if ($this->maxCache !== null) {
            $this->entityDescriptor->cacheDuration = 'PT'.$this->maxCache.'S';
        }
        if ($this->maxDuration !== null) {