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<?php
/**
* This file defines a flat file metadata source.
* Instantiation of session handler objects should be done through
* the class method getMetadataHandler().
*
* @author Andreas �kre Solberg, UNINETT AS. <andreas.solberg@uninett.no>
* @package simpleSAMLphp
*/
class SimpleSAML_Metadata_MetaDataStorageHandlerFlatFile extends SimpleSAML_Metadata_MetaDataStorageSource {
/**
* This is the directory we will load metadata files from. The path will always end
* with a '/'.
*/
private $directory;
/**
* This is an associative array which stores the different metadata sets we have loaded.
*/
private $cachedMetadata = array();
/**
* This constructor initializes the flatfile metadata storage handler with the
* specified configuration. The configuration is an associative array with the following
* possible elements:
* - 'directory': The directory we should load metadata from. The default directory is
* set in the 'metadatadir' configuration option in 'config.php'.
*
* @param $config An associtive array with the configuration for this handler.
*/
protected function __construct($config) {
assert('is_array($config)');
/* Get the configuration. */
$globalConfig = SimpleSAML_Configuration::getInstance();
/* Find the path to the directory we should search for metadata in. */
if(array_key_exists('directory', $config)) {
$this->directory = $config['directory'];
} else {
$this->directory = $globalConfig->getString('metadatadir', 'metadata/');
}
/* Resolve this directory relative to the simpleSAMLphp directory (unless it is
* an absolute path).
*/
$this->directory = $globalConfig->resolvePath($this->directory) . '/';
}
/**
* This function loads the given set of metadata from a file our metadata directory.
* This function returns NULL if it is unable to locate the given set in the metadata directory.
*
* @param $set The set of metadata we are loading.
* @return Associative array with the metadata, or NULL if we are unable to load metadata from the given file.
*/
private function load($set) {
$metadatasetfile = $this->directory . $set . '.php';
if (!file_exists($metadatasetfile)) {
return NULL;
}
$metadata = array();
include($metadatasetfile);
if (!is_array($metadata)) {
throw new Exception('Could not load metadata set [' . $set . '] from file: ' . $metadatasetfile);
}
return $metadata;
}
/**
* This function retrieves the given set of metadata. It will return an empty array if it is
* unable to locate it.
*
* @param $set The set of metadata we are retrieving.
* @return Asssociative array with the metadata. Each element in the array is an entity, and the
* key is the entity id.
*/
public function getMetadataSet($set) {
if(array_key_exists($set, $this->cachedMetadata)) {
return $this->cachedMetadata[$set];
}
$metadataSet = $this->load($set);
if($metadataSet === NULL) {
$metadataSet = array();
}
/* Add the entity id of an entry to each entry in the metadata. */
foreach ($metadataSet AS $entityId => &$entry) {
if (preg_match('/__DYNAMIC(:[0-9]+)?__/', $entityId)) {
$entry['entityid'] = $this->generateDynamicHostedEntityID($set);
} else {
$entry['entityid'] = $entityId;
}
}
$this->cachedMetadata[$set] = $metadataSet;
return $metadataSet;
}
private function generateDynamicHostedEntityID($set) {
/* Get the configuration. */
$baseurl = SimpleSAML_Utilities::getBaseURL();
if ($set === 'saml20-idp-hosted') {
return $baseurl . 'saml2/idp/metadata.php';
} elseif($set === 'shib13-idp-hosted') {
return $baseurl . 'shib13/idp/metadata.php';
} elseif($set === 'wsfed-sp-hosted') {
return 'urn:federation:' . SimpleSAML_Utilities::getSelfHost();
} elseif($set === 'adfs-idp-hosted') {
return 'urn:federation:' . SimpleSAML_Utilities::getSelfHost() . ':idp';
} else {
throw new Exception('Can not generate dynamic EntityID for metadata of this type: [' . $set . ']');
}
}
}
?>
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