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<?php
/**
* This file is part of php-saml.
*
* (c) OneLogin Inc
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*
* @package OneLogin
* @author OneLogin Inc <saml-info@onelogin.com>
* @license MIT https://github.com/onelogin/php-saml/blob/master/LICENSE
* @link https://github.com/onelogin/php-saml
*/
namespace OneLogin\Saml2;
use DOMDocument;
use Exception;
/**
* IdP Metadata Parser of OneLogin PHP Toolkit
*/
class IdPMetadataParser
{
/**
* Get IdP Metadata Info from URL
*
* @param string $url URL where the IdP metadata is published
* @param string $entityId Entity Id of the desired IdP, if no
* entity Id is provided and the XML
* metadata contains more than one
* IDPSSODescriptor, the first is returned
* @param string $desiredNameIdFormat If available on IdP metadata, use that nameIdFormat
* @param string $desiredSSOBinding Parse specific binding SSO endpoint
* @param string $desiredSLOBinding Parse specific binding SLO endpoint
*
* @return array metadata info in php-saml settings format
*/
public static function parseRemoteXML($url, $entityId = null, $desiredNameIdFormat = null, $desiredSSOBinding = Constants::BINDING_HTTP_REDIRECT, $desiredSLOBinding = Constants::BINDING_HTTP_REDIRECT)
{
$metadataInfo = array();
try {
$ch = curl_init($url);
curl_setopt($ch, CURLOPT_CUSTOMREQUEST, "GET");
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 0);
curl_setopt($ch, CURLOPT_FAILONERROR, 1);
$xml = curl_exec($ch);
if ($xml !== false) {
$metadataInfo = self::parseXML($xml, $entityId, $desiredNameIdFormat, $desiredSSOBinding, $desiredSLOBinding);
} else {
throw new Exception(curl_error($ch), curl_errno($ch));
}
} catch (Exception $e) {
}
return $metadataInfo;
}
/**
* Get IdP Metadata Info from File
*
* @param string $filepath File path
* @param string $entityId Entity Id of the desired IdP, if no
* entity Id is provided and the XML
* metadata contains more than one
* IDPSSODescriptor, the first is returned
* @param string $desiredNameIdFormat If available on IdP metadata, use that nameIdFormat
* @param string $desiredSSOBinding Parse specific binding SSO endpoint
* @param string $desiredSLOBinding Parse specific binding SLO endpoint
*
* @return array metadata info in php-saml settings format
*/
public static function parseFileXML($filepath, $entityId = null, $desiredNameIdFormat = null, $desiredSSOBinding = Constants::BINDING_HTTP_REDIRECT, $desiredSLOBinding = Constants::BINDING_HTTP_REDIRECT)
{
$metadataInfo = array();
try {
if (file_exists($filepath)) {
$data = file_get_contents($filepath);
$metadataInfo = self::parseXML($data, $entityId, $desiredNameIdFormat, $desiredSSOBinding, $desiredSLOBinding);
}
} catch (Exception $e) {
}
return $metadataInfo;
}
/**
* Get IdP Metadata Info from URL
*
* @param string $xml XML that contains IdP metadata
* @param string $entityId Entity Id of the desired IdP, if no
* entity Id is provided and the XML
* metadata contains more than one
* IDPSSODescriptor, the first is returned
* @param string $desiredNameIdFormat If available on IdP metadata, use that nameIdFormat
* @param string $desiredSSOBinding Parse specific binding SSO endpoint
* @param string $desiredSLOBinding Parse specific binding SLO endpoint
*
* @return array metadata info in php-saml settings format
*
* @throws Exception
*/
public static function parseXML($xml, $entityId = null, $desiredNameIdFormat = null, $desiredSSOBinding = Constants::BINDING_HTTP_REDIRECT, $desiredSLOBinding = Constants::BINDING_HTTP_REDIRECT)
{
$metadataInfo = array();
$dom = new DOMDocument();
$dom->preserveWhiteSpace = false;
$dom->formatOutput = true;
try {
$dom = Utils::loadXML($dom, $xml);
if (!$dom) {
throw new Exception('Error parsing metadata');
}
$customIdPStr = '';
if (!empty($entityId)) {
$customIdPStr = '[@entityID="' . $entityId . '"]';
}
$idpDescryptorXPath = '//md:EntityDescriptor' . $customIdPStr . '/md:IDPSSODescriptor';
$idpDescriptorNodes = Utils::query($dom, $idpDescryptorXPath);
if (isset($idpDescriptorNodes) && $idpDescriptorNodes->length > 0) {
$metadataInfo['idp'] = array();
$idpDescriptor = $idpDescriptorNodes->item(0);
if (empty($entityId) && $idpDescriptor->parentNode->hasAttribute('entityID')) {
$entityId = $idpDescriptor->parentNode->getAttribute('entityID');
}
if (!empty($entityId)) {
$metadataInfo['idp']['entityId'] = $entityId;
}
$ssoNodes = Utils::query($dom, './md:SingleSignOnService[@Binding="'.$desiredSSOBinding.'"]', $idpDescriptor);
if ($ssoNodes->length < 1) {
$ssoNodes = Utils::query($dom, './md:SingleSignOnService', $idpDescriptor);
}
if ($ssoNodes->length > 0) {
$metadataInfo['idp']['singleSignOnService'] = array(
'url' => $ssoNodes->item(0)->getAttribute('Location'),
'binding' => $ssoNodes->item(0)->getAttribute('Binding')
);
}
$sloNodes = Utils::query($dom, './md:SingleLogoutService[@Binding="'.$desiredSLOBinding.'"]', $idpDescriptor);
if ($sloNodes->length < 1) {
$sloNodes = Utils::query($dom, './md:SingleLogoutService', $idpDescriptor);
}
if ($sloNodes->length > 0) {
$metadataInfo['idp']['singleLogoutService'] = array(
'url' => $sloNodes->item(0)->getAttribute('Location'),
'binding' => $sloNodes->item(0)->getAttribute('Binding')
);
}
$keyDescriptorCertSigningNodes = Utils::query($dom, './md:KeyDescriptor[not(contains(@use, "encryption"))]/ds:KeyInfo/ds:X509Data/ds:X509Certificate', $idpDescriptor);
$keyDescriptorCertEncryptionNodes = Utils::query($dom, './md:KeyDescriptor[not(contains(@use, "signing"))]/ds:KeyInfo/ds:X509Data/ds:X509Certificate', $idpDescriptor);
if (!empty($keyDescriptorCertSigningNodes) || !empty($keyDescriptorCertEncryptionNodes)) {
$metadataInfo['idp']['x509certMulti'] = array();
if (!empty($keyDescriptorCertSigningNodes)) {
$idpInfo['x509certMulti']['signing'] = array();
foreach ($keyDescriptorCertSigningNodes as $keyDescriptorCertSigningNode) {
$metadataInfo['idp']['x509certMulti']['signing'][] = Utils::formatCert($keyDescriptorCertSigningNode->nodeValue, false);
}
}
if (!empty($keyDescriptorCertEncryptionNodes)) {
$idpInfo['x509certMulti']['encryption'] = array();
foreach ($keyDescriptorCertEncryptionNodes as $keyDescriptorCertEncryptionNode) {
$metadataInfo['idp']['x509certMulti']['encryption'][] = Utils::formatCert($keyDescriptorCertEncryptionNode->nodeValue, false);
}
}
$idpCertdata = $metadataInfo['idp']['x509certMulti'];
if ((count($idpCertdata) == 1 and
((isset($idpCertdata['signing']) and count($idpCertdata['signing']) == 1) or (isset($idpCertdata['encryption']) and count($idpCertdata['encryption']) == 1))) or
((isset($idpCertdata['signing']) && count($idpCertdata['signing']) == 1) && isset($idpCertdata['encryption']) && count($idpCertdata['encryption']) == 1 && strcmp($idpCertdata['signing'][0], $idpCertdata['encryption'][0]) == 0)) {
if (isset($metadataInfo['idp']['x509certMulti']['signing'][0])) {
$metadataInfo['idp']['x509cert'] = $metadataInfo['idp']['x509certMulti']['signing'][0];
} else {
$metadataInfo['idp']['x509cert'] = $metadataInfo['idp']['x509certMulti']['encryption'][0];
}
unset($metadataInfo['idp']['x509certMulti']);
}
}
$nameIdFormatNodes = Utils::query($dom, './md:NameIDFormat', $idpDescriptor);
if ($nameIdFormatNodes->length > 0) {
$metadataInfo['sp']['NameIDFormat'] = $nameIdFormatNodes->item(0)->nodeValue;
if (!empty($desiredNameIdFormat)) {
foreach ($nameIdFormatNodes as $nameIdFormatNode) {
if (strcmp($nameIdFormatNode->nodeValue, $desiredNameIdFormat) == 0) {
$metadataInfo['sp']['NameIDFormat'] = $nameIdFormatNode->nodeValue;
break;
}
}
}
}
}
} catch (Exception $e) {
throw new Exception('Error parsing metadata. '.$e->getMessage());
}
return $metadataInfo;
}
/**
* Inject metadata info into php-saml settings array
*
* @param array $settings php-saml settings array
* @param array $metadataInfo array metadata info
*
* @return array settings
*/
public static function injectIntoSettings($settings, $metadataInfo)
{
if (isset($metadataInfo['idp']) && isset($settings['idp'])) {
if (isset($metadataInfo['idp']['x509certMulti']) && !empty($metadataInfo['idp']['x509certMulti']) && isset($settings['idp']['x509cert'])) {
unset($settings['idp']['x509cert']);
}
if (isset($metadataInfo['idp']['x509cert']) && !empty($metadataInfo['idp']['x509cert']) && isset($settings['idp']['x509certMulti'])) {
unset($settings['idp']['x509certMulti']);
}
}
return array_replace_recursive($settings, $metadataInfo);
}
}
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