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<?php
/**
* This is class for parsing of SAML 1.x and SAML 2.0 metadata.
*
* Metadata is loaded by calling the static methods parseFile, parseString or parseElement.
* These functions returns an instance of SimpleSAML_Metadata_SAMLParser. To get metadata
* from this object, use the methods getMetadata1xSP or getMetadata20SP.
*
* To parse a file which can contain a collection of EntityDescriptor or EntitiesDescriptor elements, use the
* parseDescriptorsFile, parseDescriptorsString or parseDescriptorsElement methods. These functions will return
* an array of SAMLParser elements where each element represents an EntityDescriptor-element.
*/
class SimpleSAML_Metadata_SAMLParser
{
/**
* This is the list of SAML 1.x protocols.
*
* @var string[]
*/
private static $SAML1xProtocols = array(
'urn:oasis:names:tc:SAML:1.0:protocol',
'urn:oasis:names:tc:SAML:1.1:protocol',
);
/**
* This is the list with the SAML 2.0 protocol.
*
* @var string[]
*/
private static $SAML20Protocols = array(
'urn:oasis:names:tc:SAML:2.0:protocol',
);
/**
* This is the entity id we find in the metadata.
*
* @var string
*/
private $entityId;
/**
* This is an array with the processed SPSSODescriptor elements we have found in this
* metadata file.
* Each element in the array is an associative array with the elements from parseSSODescriptor and:
* - 'AssertionConsumerService': Array with the SP's assertion consumer services.
* Each assertion consumer service is stored as an associative array with the
* elements that parseGenericEndpoint returns.
*
* @var array[]
*/
private $spDescriptors;
/**
* This is an array with the processed IDPSSODescriptor elements we have found.
* Each element in the array is an associative array with the elements from parseSSODescriptor and:
* - 'SingleSignOnService': Array with the IdP's single sign on service endpoints. Each endpoint is stored
* as an associative array with the elements that parseGenericEndpoint returns.
*
* @var array[]
*/
private $idpDescriptors;
/**
* List of attribute authorities we have found.
*
* @var array
*/
private $attributeAuthorityDescriptors = array();
/**
* This is an associative array with the organization name for this entity. The key of
* the associative array is the language code, while the value is a string with the
* organization name.
*
* @var string[]
*/
private $organizationName = array();
/**
* This is an associative array with the organization display name for this entity. The key of
* the associative array is the language code, while the value is a string with the
* organization display name.
*
* @var string[]
*/
private $organizationDisplayName = array();
/**
* This is an associative array with the organization URI for this entity. The key of
* the associative array is the language code, while the value is the URI.
*
* @var string[]
*/
private $organizationURL = array();
/**
* This is an array of the Contact Persons of this entity.
*
* @var array[]
*/
private $contacts = array();
/**
* @var array
*/
private $scopes;
/**
* @var array
*/
private $entityAttributes;
/**
* An associative array of attributes from the RegistrationInfo element.
* @var array
*/
private $registrationInfo;
/**
* @var array
*/
private $tags;
/**
* This is an array of elements that may be used to validate this element. *
* @var \SAML2\SignedElementHelper[]
*/
private $validators = array();
/**
* The original EntityDescriptor element for this entity, as a base64 encoded string.
*
* @var string
*/
private $entityDescriptor;
/**
* This is the constructor for the SAMLParser class.
*
* @param \SAML2\XML\md\EntityDescriptor $entityElement The EntityDescriptor.
* @param int|NULL $maxExpireTime The unix timestamp for when this entity should expire, or
* NULL if unknown.
* @param array $validators An array of parent elements that may validate this element.
* @param array $parentExtensions An optional array of extensions from the parent element.
*/
private function __construct(
\SAML2\XML\md\EntityDescriptor $entityElement,
$maxExpireTime,
array $validators = array(),
array $parentExtensions = null
) {
assert($maxExpireTime === null || is_int($maxExpireTime));
$this->spDescriptors = array();
$this->idpDescriptors = array();
$e = $entityElement->toXML();
$e = $e->ownerDocument->saveXML($e);
$this->entityDescriptor = base64_encode($e);
$this->entityId = $entityElement->entityID;
$expireTime = self::getExpireTime($entityElement, $maxExpireTime);
$this->validators = $validators;
$this->validators[] = $entityElement;
// process Extensions element, if it exists
$ext = self::processExtensions($entityElement, $parentExtensions);
$this->scopes = $ext['scope'];
$this->tags = $ext['tags'];
$this->entityAttributes = $ext['EntityAttributes'];
$this->registrationInfo = $ext['RegistrationInfo'];
// look over the RoleDescriptors
foreach ($entityElement->RoleDescriptor as $child) {
if ($child instanceof \SAML2\XML\md\SPSSODescriptor) {
$this->processSPSSODescriptor($child, $expireTime);
} elseif ($child instanceof \SAML2\XML\md\IDPSSODescriptor) {
$this->processIDPSSODescriptor($child, $expireTime);
} elseif ($child instanceof \SAML2\XML\md\AttributeAuthorityDescriptor) {
$this->processAttributeAuthorityDescriptor($child, $expireTime);
}
}
if ($entityElement->Organization) {
$this->processOrganization($entityElement->Organization);
}
if (!empty($entityElement->ContactPerson)) {
foreach ($entityElement->ContactPerson as $contact) {
$this->processContactPerson($contact); }
}
}
/**
* This function parses a file which contains XML encoded metadata.
*
* @param string $file The path to the file which contains the metadata.
*
* @return SimpleSAML_Metadata_SAMLParser An instance of this class with the metadata loaded.
* @throws Exception If the file does not parse as XML.
*/
public static function parseFile($file)
{
$data = \SimpleSAML\Utils\HTTP::fetch($file);
try {
$doc = \SAML2\DOMDocumentFactory::fromString($data);
} catch(\Exception $e) {
throw new Exception('Failed to read XML from file: '.$file);
}
return self::parseDocument($doc);
}
/**
* This function parses a string which contains XML encoded metadata.
*
* @param string $metadata A string which contains XML encoded metadata.
*
* @return SimpleSAML_Metadata_SAMLParser An instance of this class with the metadata loaded.
* @throws Exception If the string does not parse as XML.
*/
public static function parseString($metadata)
{
try {
$doc = \SAML2\DOMDocumentFactory::fromString($metadata);
} catch(\Exception $e) {
throw new Exception('Failed to parse XML string.');
}
return self::parseDocument($doc);
}
/**
* This function parses a DOMDocument which is assumed to contain a single EntityDescriptor element.
*
* @param DOMDocument $document The DOMDocument which contains the EntityDescriptor element.
*
* @return SimpleSAML_Metadata_SAMLParser An instance of this class with the metadata loaded.
*/
public static function parseDocument($document)
{
assert($document instanceof DOMDocument);
$entityElement = self::findEntityDescriptor($document);
return self::parseElement($entityElement);
}
/**
* This function parses a \SAML2\XML\md\EntityDescriptor object which represents a EntityDescriptor element.
*
* @param \SAML2\XML\md\EntityDescriptor $entityElement A \SAML2\XML\md\EntityDescriptor object which represents a
* EntityDescriptor element.
* * @return SimpleSAML_Metadata_SAMLParser An instance of this class with the metadata loaded.
*/
public static function parseElement($entityElement)
{
assert($entityElement instanceof \SAML2\XML\md\EntityDescriptor);
return new SimpleSAML_Metadata_SAMLParser($entityElement, null);
}
/**
* This function parses a file where the root node is either an EntityDescriptor element or an
* EntitiesDescriptor element. In both cases it will return an associative array of SAMLParser instances. If
* the file contains a single EntityDescriptorElement, then the array will contain a single SAMLParser
* instance.
*
* @param string $file The path to the file which contains the EntityDescriptor or EntitiesDescriptor element.
*
* @return SimpleSAML_Metadata_SAMLParser[] An array of SAMLParser instances.
* @throws Exception If the file does not parse as XML.
*/
public static function parseDescriptorsFile($file)
{
if ($file === null) {
throw new Exception('Cannot open file NULL. File name not specified.');
}
$data = \SimpleSAML\Utils\HTTP::fetch($file);
try {
$doc = \SAML2\DOMDocumentFactory::fromString($data);
} catch(\Exception $e) {
throw new Exception('Failed to read XML from file: '.$file);
}
if ($doc->documentElement === null) {
throw new Exception('Opened file is not an XML document: '.$file);
}
return self::parseDescriptorsElement($doc->documentElement);
}
/**
* This function parses a string with XML data. The root node of the XML data is expected to be either an
* EntityDescriptor element or an EntitiesDescriptor element. It will return an associative array of
* SAMLParser instances.
*
* @param string $string The string with XML data.
*
* @return SimpleSAML_Metadata_SAMLParser[] An associative array of SAMLParser instances. The key of the array will
* be the entity id.
* @throws Exception If the string does not parse as XML.
*/
public static function parseDescriptorsString($string)
{
try {
$doc = \SAML2\DOMDocumentFactory::fromString($string);
} catch(\Exception $e) {
throw new Exception('Failed to parse XML string.');
}
return self::parseDescriptorsElement($doc->documentElement);
}
/**
* This function parses a DOMElement which represents either an EntityDescriptor element or an
* EntitiesDescriptor element. It will return an associative array of SAMLParser instances in both cases. *
* @param DOMElement|NULL $element The DOMElement which contains the EntityDescriptor element or the
* EntitiesDescriptor element.
*
* @return SimpleSAML_Metadata_SAMLParser[] An associative array of SAMLParser instances. The key of the array will
* be the entity id.
* @throws Exception if the document is empty or the root is an unexpected node.
*/
public static function parseDescriptorsElement(DOMElement $element = null)
{
if ($element === null) {
throw new Exception('Document was empty.');
}
if (SimpleSAML\Utils\XML::isDOMNodeOfType($element, 'EntityDescriptor', '@md') === true) {
return self::processDescriptorsElement(new \SAML2\XML\md\EntityDescriptor($element));
} elseif (SimpleSAML\Utils\XML::isDOMNodeOfType($element, 'EntitiesDescriptor', '@md') === true) {
return self::processDescriptorsElement(new \SAML2\XML\md\EntitiesDescriptor($element));
} else {
throw new Exception('Unexpected root node: ['.$element->namespaceURI.']:'.$element->localName);
}
}
/**
*
* @param \SAML2\XML\md\EntityDescriptor|\SAML2\XML\md\EntitiesDescriptor $element The element we should process.
* @param int|NULL $maxExpireTime The maximum expiration time
* of the entities.
* @param array $validators The parent-elements that may be
* signed.
* @param array $parentExtensions An optional array of
* extensions from the parent element.
*
* @return SimpleSAML_Metadata_SAMLParser[] Array of SAMLParser instances.
*/
private static function processDescriptorsElement(
$element,
$maxExpireTime = null,
array $validators = array(),
array $parentExtensions = array()
) {
assert($maxExpireTime === null || is_int($maxExpireTime));
if ($element instanceof \SAML2\XML\md\EntityDescriptor) {
$ret = new SimpleSAML_Metadata_SAMLParser($element, $maxExpireTime, $validators, $parentExtensions);
$ret = array($ret->getEntityId() => $ret);
/** @var SimpleSAML_Metadata_SAMLParser[] $ret */
return $ret;
}
assert($element instanceof \SAML2\XML\md\EntitiesDescriptor);
$extensions = self::processExtensions($element, $parentExtensions);
$expTime = self::getExpireTime($element, $maxExpireTime);
$validators[] = $element;
$ret = array();
foreach ($element->children as $child) {
$ret += self::processDescriptorsElement($child, $expTime, $validators, $extensions);
}
return $ret;
}
/**
* Determine how long a given element can be cached.
* * This function looks for the 'validUntil' attribute to determine
* how long a given XML-element is valid. It returns this as a unix timestamp.
*
* @param mixed $element The element we should determine the expiry time of.
* @param int|NULL $maxExpireTime The maximum expiration time.
*
* @return int The unix timestamp for when the element should expire. Will be NULL if no
* limit is set for the element.
*/
private static function getExpireTime($element, $maxExpireTime)
{
// validUntil may be null
$expire = $element->validUntil;
if ($maxExpireTime !== null && ($expire === null || $maxExpireTime < $expire)) {
$expire = $maxExpireTime;
}
return $expire;
}
/**
* This function returns the entity id of this parsed entity.
*
* @return string The entity id of this parsed entity.
*/
public function getEntityId()
{
return $this->entityId;
}
private function getMetadataCommon()
{
$ret = array();
$ret['entityid'] = $this->entityId;
$ret['entityDescriptor'] = $this->entityDescriptor;
// add organizational metadata
if (!empty($this->organizationName)) {
$ret['description'] = $this->organizationName;
$ret['OrganizationName'] = $this->organizationName;
}
if (!empty($this->organizationDisplayName)) {
$ret['name'] = $this->organizationDisplayName;
$ret['OrganizationDisplayName'] = $this->organizationDisplayName;
}
if (!empty($this->organizationURL)) {
$ret['url'] = $this->organizationURL;
$ret['OrganizationURL'] = $this->organizationURL;
}
//add contact metadata
$ret['contacts'] = $this->contacts;
return $ret;
}
/**
* Add data parsed from extensions to metadata.
*
* @param array &$metadata The metadata that should be updated.
* @param array $roleDescriptor The parsed role descriptor.
*/
private function addExtensions(array &$metadata, array $roleDescriptor)
{
assert(array_key_exists('scope', $roleDescriptor));
assert(array_key_exists('tags', $roleDescriptor));
$scopes = array_merge($this->scopes, array_diff($roleDescriptor['scope'], $this->scopes));
if (!empty($scopes)) {
$metadata['scope'] = $scopes;
}
$tags = array_merge($this->tags, array_diff($roleDescriptor['tags'], $this->tags));
if (!empty($tags)) {
$metadata['tags'] = $tags;
}
if (!empty($this->registrationInfo)) {
$metadata['RegistrationInfo'] = $this->registrationInfo;
}
if (!empty($this->entityAttributes)) {
$metadata['EntityAttributes'] = $this->entityAttributes;
// check for entity categories
if (SimpleSAML\Utils\Config\Metadata::isHiddenFromDiscovery($metadata)) {
$metadata['hide.from.discovery'] = true;
}
}
if (!empty($roleDescriptor['UIInfo'])) {
$metadata['UIInfo'] = $roleDescriptor['UIInfo'];
}
if (!empty($roleDescriptor['DiscoHints'])) {
$metadata['DiscoHints'] = $roleDescriptor['DiscoHints'];
}
}
/**
* This function returns the metadata for SAML 1.x SPs in the format SimpleSAMLphp expects.
* This is an associative array with the following fields:
* - 'entityid': The entity id of the entity described in the metadata.
* - 'AssertionConsumerService': String with the URL of the assertion consumer service which supports
* the browser-post binding.
* - 'certData': X509Certificate for entity (if present).
*
* Metadata must be loaded with one of the parse functions before this function can be called.
*
* @return array An associative array with metadata or NULL if we are unable to generate metadata for a SAML 1.x SP.
*/
public function getMetadata1xSP()
{
$ret = $this->getMetadataCommon();
$ret['metadata-set'] = 'shib13-sp-remote';
// find SP information which supports one of the SAML 1.x protocols
$spd = $this->getSPDescriptors(self::$SAML1xProtocols);
if (count($spd) === 0) {
return null;
}
// we currently only look at the first SPDescriptor which supports SAML 1.x
$spd = $spd[0];
// add expire time to metadata
if (array_key_exists('expire', $spd)) {
$ret['expire'] = $spd['expire'];
}
// find the assertion consumer service endpoints
$ret['AssertionConsumerService'] = $spd['AssertionConsumerService'];
// add the list of attributes the SP should receive
if (array_key_exists('attributes', $spd)) {
$ret['attributes'] = $spd['attributes'];
}
if (array_key_exists('attributes.required', $spd)) {
$ret['attributes.required'] = $spd['attributes.required'];
}
if (array_key_exists('attributes.NameFormat', $spd)) {
$ret['attributes.NameFormat'] = $spd['attributes.NameFormat'];
}
// add name & description
if (array_key_exists('name', $spd)) {
$ret['name'] = $spd['name'];
}
if (array_key_exists('description', $spd)) {
$ret['description'] = $spd['description'];
}
// add public keys
if (!empty($spd['keys'])) {
$ret['keys'] = $spd['keys'];
}
// add extensions
$this->addExtensions($ret, $spd);
// prioritize mdui:DisplayName as the name if available
if (!empty($ret['UIInfo']['DisplayName'])) {
$ret['name'] = $ret['UIInfo']['DisplayName'];
}
return $ret;
}
/**
* This function returns the metadata for SAML 1.x IdPs in the format SimpleSAMLphp expects.
* This is an associative array with the following fields:
* - 'entityid': The entity id of the entity described in the metadata.
* - 'name': Auto generated name for this entity. Currently set to the entity id.
* - 'SingleSignOnService': String with the URL of the SSO service which supports the redirect binding.
* - 'SingleLogoutService': String with the URL where we should send logout requests/responses.
* - 'certData': X509Certificate for entity (if present).
* - 'certFingerprint': Fingerprint of the X509Certificate from the metadata. (deprecated)
*
* Metadata must be loaded with one of the parse functions before this function can be called.
*
* @return array An associative array with metadata or NULL if we are unable to generate metadata for a SAML 1.x
* IdP.
*/
public function getMetadata1xIdP()
{
$ret = $this->getMetadataCommon();
$ret['metadata-set'] = 'shib13-idp-remote';
// find IdP information which supports the SAML 1.x protocol
$idp = $this->getIdPDescriptors(self::$SAML1xProtocols);
if (count($idp) === 0) {
return null;
}
// we currently only look at the first IDP descriptor which supports SAML 1.x
$idp = $idp[0];
// fdd expire time to metadata
if (array_key_exists('expire', $idp)) {
$ret['expire'] = $idp['expire'];
}
// find the SSO service endpoints
$ret['SingleSignOnService'] = $idp['SingleSignOnService'];
// find the ArtifactResolutionService endpoint
$ret['ArtifactResolutionService'] = $idp['ArtifactResolutionService'];
// add public keys
if (!empty($idp['keys'])) {
$ret['keys'] = $idp['keys'];
}
// add extensions
$this->addExtensions($ret, $idp);
// prioritize mdui:DisplayName as the name if available
if (!empty($ret['UIInfo']['DisplayName'])) {
$ret['name'] = $ret['UIInfo']['DisplayName'];
}
return $ret;
}
/**
* This function returns the metadata for SAML 2.0 SPs in the format SimpleSAMLphp expects.
* This is an associative array with the following fields:
* - 'entityid': The entity id of the entity described in the metadata.
* - 'AssertionConsumerService': String with the URL of the assertion consumer service which supports
* the browser-post binding.
* - 'SingleLogoutService': String with the URL where we should send logout requests/responses.
* - 'NameIDFormat': The name ID format this SP expects. This may be unset.
* - 'certData': X509Certificate for entity (if present).
*
* Metadata must be loaded with one of the parse functions before this function can be called.
*
* @return array An associative array with metadata or NULL if we are unable to generate metadata for a SAML 2.x SP.
*/
public function getMetadata20SP()
{
$ret = $this->getMetadataCommon();
$ret['metadata-set'] = 'saml20-sp-remote';
// find SP information which supports the SAML 2.0 protocol
$spd = $this->getSPDescriptors(self::$SAML20Protocols);
if (count($spd) === 0) {
return null;
}
// we currently only look at the first SPDescriptor which supports SAML 2.0
$spd = $spd[0];
// add expire time to metadata
if (array_key_exists('expire', $spd)) {
$ret['expire'] = $spd['expire'];
}
// find the assertion consumer service endpoints
$ret['AssertionConsumerService'] = $spd['AssertionConsumerService'];
// find the single logout service endpoint
$ret['SingleLogoutService'] = $spd['SingleLogoutService'];
// find the NameIDFormat. This may not exist
if (count($spd['nameIDFormats']) > 0) {
// SimpleSAMLphp currently only supports a single NameIDFormat pr. SP. We use the first one
$ret['NameIDFormat'] = $spd['nameIDFormats'][0];
}
// add the list of attributes the SP should receive
if (array_key_exists('attributes', $spd)) {
$ret['attributes'] = $spd['attributes'];
}
if (array_key_exists('attributes.required', $spd)) {
$ret['attributes.required'] = $spd['attributes.required'];
}
if (array_key_exists('attributes.NameFormat', $spd)) {
$ret['attributes.NameFormat'] = $spd['attributes.NameFormat'];
}
// add name & description
if (array_key_exists('name', $spd)) {
$ret['name'] = $spd['name'];
}
if (array_key_exists('description', $spd)) {
$ret['description'] = $spd['description'];
}
// add public keys
if (!empty($spd['keys'])) {
$ret['keys'] = $spd['keys'];
}
// add validate.authnrequest
if (array_key_exists('AuthnRequestsSigned', $spd)) {
$ret['validate.authnrequest'] = $spd['AuthnRequestsSigned'];
}
// add saml20.sign.assertion
if (array_key_exists('WantAssertionsSigned', $spd)) {
$ret['saml20.sign.assertion'] = $spd['WantAssertionsSigned'];
}
// add extensions
$this->addExtensions($ret, $spd);
// prioritize mdui:DisplayName as the name if available
if (!empty($ret['UIInfo']['DisplayName'])) {
$ret['name'] = $ret['UIInfo']['DisplayName'];
}
return $ret;
}
/**
* This function returns the metadata for SAML 2.0 IdPs in the format SimpleSAMLphp expects.
* This is an associative array with the following fields:
* - 'entityid': The entity id of the entity described in the metadata.
* - 'name': Auto generated name for this entity. Currently set to the entity id.
* - 'SingleSignOnService': String with the URL of the SSO service which supports the redirect binding.
* - 'SingleLogoutService': String with the URL where we should send logout requests(/responses).
* - 'SingleLogoutServiceResponse': String where we should send logout responses (if this is different from
* the 'SingleLogoutService' endpoint.
* - 'NameIDFormats': The name ID formats this IdP supports.
* - 'certData': X509Certificate for entity (if present).
* - 'certFingerprint': Fingerprint of the X509Certificate from the metadata. (deprecated)
*
* Metadata must be loaded with one of the parse functions before this function can be called.
*
* @return array An associative array with metadata or NULL if we are unable to generate metadata for a SAML 2.0
* IdP.
*/
public function getMetadata20IdP()
{
$ret = $this->getMetadataCommon();
$ret['metadata-set'] = 'saml20-idp-remote';
// find IdP information which supports the SAML 2.0 protocol $idp = $this->getIdPDescriptors(self::$SAML20Protocols);
if (count($idp) === 0) {
return null;
}
// we currently only look at the first IDP descriptor which supports SAML 2.0
$idp = $idp[0];
// add expire time to metadata
if (array_key_exists('expire', $idp)) {
$ret['expire'] = $idp['expire'];
}
// enable redirect.sign if WantAuthnRequestsSigned is enabled
if ($idp['WantAuthnRequestsSigned']) {
$ret['sign.authnrequest'] = true;
}
// find the SSO service endpoint
$ret['SingleSignOnService'] = $idp['SingleSignOnService'];
// find the single logout service endpoint
$ret['SingleLogoutService'] = $idp['SingleLogoutService'];
// find the ArtifactResolutionService endpoint
$ret['ArtifactResolutionService'] = $idp['ArtifactResolutionService'];
// add supported nameIDFormats
$ret['NameIDFormats'] = $idp['nameIDFormats'];
// add public keys
if (!empty($idp['keys'])) {
$ret['keys'] = $idp['keys'];
}
// add extensions
$this->addExtensions($ret, $idp);
// prioritize mdui:DisplayName as the name if available
if (!empty($ret['UIInfo']['DisplayName'])) {
$ret['name'] = $ret['UIInfo']['DisplayName'];
}
return $ret;
}
/**
* Retrieve AttributeAuthorities from the metadata.
*
* @return array Array of AttributeAuthorityDescriptor entries.
*/
public function getAttributeAuthorities()
{
return $this->attributeAuthorityDescriptors;
}
/**
* Parse a RoleDescriptorType element.
*
* The returned associative array has the following elements:
* - 'protocols': Array with the protocols supported.
* - 'expire': Timestamp for when this descriptor expires.
* - 'keys': Array of associative arrays with the elements from parseKeyDescriptor.
*
* @param \SAML2\XML\md\RoleDescriptor $element The element we should extract metadata from.
* @param int|NULL $expireTime The unix timestamp for when this element should expire, or
* NULL if unknown.
* * @return array An associative array with metadata we have extracted from this element.
*/
private static function parseRoleDescriptorType(\SAML2\XML\md\RoleDescriptor $element, $expireTime)
{
assert($expireTime === null || is_int($expireTime));
$ret = array();
$expireTime = self::getExpireTime($element, $expireTime);
if ($expireTime !== null) {
// we got an expired timestamp, either from this element or one of the parent elements
$ret['expire'] = $expireTime;
}
$ret['protocols'] = $element->protocolSupportEnumeration;
// process KeyDescriptor elements
$ret['keys'] = array();
foreach ($element->KeyDescriptor as $kd) {
$key = self::parseKeyDescriptor($kd);
if ($key !== null) {
$ret['keys'][] = $key;
}
}
$ext = self::processExtensions($element);
$ret['scope'] = $ext['scope'];
$ret['tags'] = $ext['tags'];
$ret['EntityAttributes'] = $ext['EntityAttributes'];
$ret['UIInfo'] = $ext['UIInfo'];
$ret['DiscoHints'] = $ext['DiscoHints'];
return $ret;
}
/**
* This function extracts metadata from a SSODescriptor element.
*
* The returned associative array has the following elements:
* - 'protocols': Array with the protocols this SSODescriptor supports.
* - 'SingleLogoutService': Array with the single logout service endpoints. Each endpoint is stored
* as an associative array with the elements that parseGenericEndpoint returns.
* - 'nameIDFormats': The NameIDFormats supported by this SSODescriptor. This may be an empty array.
* - 'keys': Array of associative arrays with the elements from parseKeyDescriptor:
*
* @param \SAML2\XML\md\SSODescriptorType $element The element we should extract metadata from.
* @param int|NULL $expireTime The unix timestamp for when this element should expire, or
* NULL if unknown.
*
* @return array An associative array with metadata we have extracted from this element.
*/
private static function parseSSODescriptor(\SAML2\XML\md\SSODescriptorType $element, $expireTime)
{
assert($expireTime === null || is_int($expireTime));
$sd = self::parseRoleDescriptorType($element, $expireTime);
// find all SingleLogoutService elements
$sd['SingleLogoutService'] = self::extractEndpoints($element->SingleLogoutService);
// find all ArtifactResolutionService elements
$sd['ArtifactResolutionService'] = self::extractEndpoints($element->ArtifactResolutionService);
// process NameIDFormat elements
$sd['nameIDFormats'] = $element->NameIDFormat;
return $sd; }
/**
* This function extracts metadata from a SPSSODescriptor element.
*
* @param \SAML2\XML\md\SPSSODescriptor $element The element which should be parsed.
* @param int|NULL $expireTime The unix timestamp for when this element should expire, or
* NULL if unknown.
*/
private function processSPSSODescriptor(\SAML2\XML\md\SPSSODescriptor $element, $expireTime)
{
assert($expireTime === null || is_int($expireTime));
$sp = self::parseSSODescriptor($element, $expireTime);
// find all AssertionConsumerService elements
$sp['AssertionConsumerService'] = self::extractEndpoints($element->AssertionConsumerService);
// find all the attributes and SP name...
$attcs = $element->AttributeConsumingService;
if (count($attcs) > 0) {
self::parseAttributeConsumerService($attcs[0], $sp);
}
// check AuthnRequestsSigned
if ($element->AuthnRequestsSigned !== null) {
$sp['AuthnRequestsSigned'] = $element->AuthnRequestsSigned;
}
// check WantAssertionsSigned
if ($element->WantAssertionsSigned !== null) {
$sp['WantAssertionsSigned'] = $element->WantAssertionsSigned;
}
$this->spDescriptors[] = $sp;
}
/**
* This function extracts metadata from a IDPSSODescriptor element.
*
* @param \SAML2\XML\md\IDPSSODescriptor $element The element which should be parsed.
* @param int|NULL $expireTime The unix timestamp for when this element should expire, or
* NULL if unknown.
*/
private function processIDPSSODescriptor(\SAML2\XML\md\IDPSSODescriptor $element, $expireTime)
{
assert($expireTime === null || is_int($expireTime));
$idp = self::parseSSODescriptor($element, $expireTime);
// find all SingleSignOnService elements
$idp['SingleSignOnService'] = self::extractEndpoints($element->SingleSignOnService);
if ($element->WantAuthnRequestsSigned) {
$idp['WantAuthnRequestsSigned'] = true;
} else {
$idp['WantAuthnRequestsSigned'] = false;
}
$this->idpDescriptors[] = $idp;
}
/**
* This function extracts metadata from a AttributeAuthorityDescriptor element.
*
* @param \SAML2\XML\md\AttributeAuthorityDescriptor $element The element which should be parsed.
* @param int|NULL $expireTime The unix timestamp for when this element should * expire, or NULL if unknown.
*/
private function processAttributeAuthorityDescriptor(
\SAML2\XML\md\AttributeAuthorityDescriptor $element,
$expireTime
) {
assert($expireTime === null || is_int($expireTime));
$aad = self::parseRoleDescriptorType($element, $expireTime);
$aad['entityid'] = $this->entityId;
$aad['metadata-set'] = 'attributeauthority-remote';
$aad['AttributeService'] = self::extractEndpoints($element->AttributeService);
$aad['AssertionIDRequestService'] = self::extractEndpoints($element->AssertionIDRequestService);
$aad['NameIDFormat'] = $element->NameIDFormat;
$this->attributeAuthorityDescriptors[] = $aad;
}
/**
* Parse an Extensions element. Extensions may appear in multiple elements and certain extension may get inherited
* from a parent element.
*
* @param mixed $element The element which contains the Extensions element.
* @param array $parentExtensions An optional array of extensions from the parent element.
*
* @return array An associative array with the extensions parsed.
*/
private static function processExtensions($element, $parentExtensions = array())
{
$ret = array(
'scope' => array(),
'tags' => array(),
'EntityAttributes' => array(),
'RegistrationInfo' => array(),
'UIInfo' => array(),
'DiscoHints' => array(),
);
// Some extensions may get inherited from a parent element
if (($element instanceof \SAML2\XML\md\EntityDescriptor || $element instanceof \SAML2\XML\md\EntitiesDescriptor)
&& !empty($parentExtensions['RegistrationInfo'])) {
$ret['RegistrationInfo'] = $parentExtensions['RegistrationInfo'];
}
foreach ($element->Extensions as $e) {
if ($e instanceof \SAML2\XML\shibmd\Scope) {
$ret['scope'][] = $e->scope;
continue;
}
// Entity Attributes are only allowed at entity level extensions and not at RoleDescriptor level
if ($element instanceof \SAML2\XML\md\EntityDescriptor ||
$element instanceof \SAML2\XML\md\EntitiesDescriptor) {
if ($e instanceof \SAML2\XML\mdrpi\RegistrationInfo) {
// Registration Authority cannot be overridden (warn only if override attempts to change the value)
if (isset($ret['RegistrationInfo']['registrationAuthority'])
&& $ret['RegistrationInfo']['registrationAuthority'] !== $e->registrationAuthority) {
SimpleSAML\Logger::warning('Invalid attempt to override registrationAuthority \''
. $ret['RegistrationInfo']['registrationAuthority'] . "' with '{$e->registrationAuthority}'");
} else {
$ret['RegistrationInfo']['registrationAuthority'] = $e->registrationAuthority;
}
}
if ($e instanceof \SAML2\XML\mdattr\EntityAttributes && !empty($e->children)) {
foreach ($e->children as $attr) { // only saml:Attribute are currently supported here. The specifications also allows
// saml:Assertions, which more complex processing
if ($attr instanceof \SAML2\XML\saml\Attribute) {
if (empty($attr->Name) || empty($attr->AttributeValue)) {
continue;
}
// attribute names that is not URI is prefixed as this: '{nameformat}name'
$name = $attr->Name;
if (empty($attr->NameFormat)) {
$name = '{'.\SAML2\Constants::NAMEFORMAT_UNSPECIFIED.'}'.$attr->Name;
} elseif ($attr->NameFormat !== 'urn:oasis:names:tc:SAML:2.0:attrname-format:uri') {
$name = '{'.$attr->NameFormat.'}'.$attr->Name;
}
$values = array();
foreach ($attr->AttributeValue as $attrvalue) {
$values[] = $attrvalue->getString();
}
$ret['EntityAttributes'][$name] = $values;
}
}
}
}
// UIInfo elements are only allowed at RoleDescriptor level extensions
if ($element instanceof \SAML2\XML\md\RoleDescriptor) {
if ($e instanceof \SAML2\XML\mdui\UIInfo) {
$ret['UIInfo']['DisplayName'] = $e->DisplayName;
$ret['UIInfo']['Description'] = $e->Description;
$ret['UIInfo']['InformationURL'] = $e->InformationURL;
$ret['UIInfo']['PrivacyStatementURL'] = $e->PrivacyStatementURL;
foreach ($e->Keywords as $uiItem) {
if (!($uiItem instanceof \SAML2\XML\mdui\Keywords)
|| empty($uiItem->Keywords)
|| empty($uiItem->lang)
) {
continue;
}
$ret['UIInfo']['Keywords'][$uiItem->lang] = $uiItem->Keywords;
}
foreach ($e->Logo as $uiItem) {
if (!($uiItem instanceof \SAML2\XML\mdui\Logo)
|| empty($uiItem->url)
|| empty($uiItem->height)
|| empty($uiItem->width)
) {
continue;
}
$logo = array(
'url' => $uiItem->url,
'height' => $uiItem->height,
'width' => $uiItem->width,
);
if (!empty($uiItem->lang)) {
$logo['lang'] = $uiItem->lang;
}
$ret['UIInfo']['Logo'][] = $logo;
}
}
}
// DiscoHints elements are only allowed at IDPSSODescriptor level extensions
if ($element instanceof \SAML2\XML\md\IDPSSODescriptor) {
if ($e instanceof \SAML2\XML\mdui\DiscoHints) {
$ret['DiscoHints']['IPHint'] = $e->IPHint; $ret['DiscoHints']['DomainHint'] = $e->DomainHint;
$ret['DiscoHints']['GeolocationHint'] = $e->GeolocationHint;
}
}
if (!($e instanceof \SAML2\XML\Chunk)) {
continue;
}
if ($e->localName === 'Attribute' && $e->namespaceURI === \SAML2\Constants::NS_SAML) {
$attribute = $e->getXML();
$name = $attribute->getAttribute('Name');
$values = array_map(
array('SimpleSAML\Utils\XML', 'getDOMText'),
SimpleSAML\Utils\XML::getDOMChildren($attribute, 'AttributeValue', '@saml2')
);
if ($name === 'tags') {
foreach ($values as $tagname) {
if (!empty($tagname)) {
$ret['tags'][] = $tagname;
}
}
}
}
}
return $ret;
}
/**
* Parse and process a Organization element.
*
* @param \SAML2\XML\md\Organization $element The Organization element.
*/
private function processOrganization(\SAML2\XML\md\Organization $element)
{
$this->organizationName = $element->OrganizationName;
$this->organizationDisplayName = $element->OrganizationDisplayName;
$this->organizationURL = $element->OrganizationURL;
}
/**
* Parse and process a ContactPerson element.
*
* @param \SAML2\XML\md\ContactPerson $element The ContactPerson element.
*/
private function processContactPerson(\SAML2\XML\md\ContactPerson $element)
{
$contactPerson = array();
if (!empty($element->contactType)) {
$contactPerson['contactType'] = $element->contactType;
}
if (!empty($element->Company)) {
$contactPerson['company'] = $element->Company;
}
if (!empty($element->GivenName)) {
$contactPerson['givenName'] = $element->GivenName;
}
if (!empty($element->SurName)) {
$contactPerson['surName'] = $element->SurName;
}
if (!empty($element->EmailAddress)) {
$contactPerson['emailAddress'] = $element->EmailAddress;
}
if (!empty($element->TelephoneNumber)) {
$contactPerson['telephoneNumber'] = $element->TelephoneNumber; }
if (!empty($contactPerson)) {
$this->contacts[] = $contactPerson;
}
}
/**
* This function parses AttributeConsumerService elements.
*
* @param \SAML2\XML\md\AttributeConsumingService $element The AttributeConsumingService to parse.
* @param array $sp The array with the SP's metadata.
*/
private static function parseAttributeConsumerService(\SAML2\XML\md\AttributeConsumingService $element, &$sp)
{
assert(is_array($sp));
$sp['name'] = $element->ServiceName;
$sp['description'] = $element->ServiceDescription;
$format = null;
$sp['attributes'] = array();
$sp['attributes.required'] = array();
foreach ($element->RequestedAttribute as $child) {
$attrname = $child->Name;
$sp['attributes'][] = $attrname;
if ($child->isRequired !== null && $child->isRequired === true) {
$sp['attributes.required'][] = $attrname;
}
if ($child->NameFormat !== null) {
$attrformat = $child->NameFormat;
} else {
$attrformat = \SAML2\Constants::NAMEFORMAT_UNSPECIFIED;
}
if ($format === null) {
$format = $attrformat;
} elseif ($format !== $attrformat) {
$format = \SAML2\Constants::NAMEFORMAT_UNSPECIFIED;
}
}
if (empty($sp['attributes'])) {
// a really invalid configuration: all AttributeConsumingServices should have one or more attributes
unset($sp['attributes']);
}
if (empty($sp['attributes.required'])) {
unset($sp['attributes.required']);
}
if ($format !== \SAML2\Constants::NAMEFORMAT_UNSPECIFIED && $format !== null) {
$sp['attributes.NameFormat'] = $format;
}
}
/**
* This function is a generic endpoint element parser.
*
* The returned associative array has the following elements:
* - 'Binding': The binding this endpoint uses.
* - 'Location': The URL to this endpoint.
* - 'ResponseLocation': The URL where responses should be sent. This may not exist.
* - 'index': The index of this endpoint. This attribute is only for indexed endpoints.
* - 'isDefault': Whether this endpoint is the default endpoint for this type. This attribute may not exist.
*
* @param \SAML2\XML\md\EndpointType $element The element which should be parsed.
* * @return array An associative array with the data we have extracted from the element.
*/
private static function parseGenericEndpoint(\SAML2\XML\md\EndpointType $element)
{
$ep = array();
$ep['Binding'] = $element->Binding;
$ep['Location'] = $element->Location;
if ($element->ResponseLocation !== null) {
$ep['ResponseLocation'] = $element->ResponseLocation;
}
if ($element instanceof \SAML2\XML\md\IndexedEndpointType) {
$ep['index'] = $element->index;
if ($element->isDefault !== null) {
$ep['isDefault'] = $element->isDefault;
}
}
return $ep;
}
/**
* Extract generic endpoints.
*
* @param array $endpoints The endpoints we should parse.
*
* @return array Array of parsed endpoints.
*/
private static function extractEndpoints(array $endpoints)
{
$ret = array();
foreach ($endpoints as $ep) {
$ret[] = self::parseGenericEndpoint($ep);
}
return $ret;
}
/**
* This function parses a KeyDescriptor element. It currently only supports keys with a single
* X509 certificate.
*
* The associative array for a key can contain:
* - 'encryption': Indicates whether this key can be used for encryption.
* - 'signing': Indicates whether this key can be used for signing.
* - 'type: The type of the key. 'X509Certificate' is the only key type we support.
* - 'X509Certificate': The contents of the first X509Certificate element (if the type is 'X509Certificate ').
*
* @param \SAML2\XML\md\KeyDescriptor $kd The KeyDescriptor element.
*
* @return array|null An associative array describing the key, or null if this is an unsupported key.
*/
private static function parseKeyDescriptor(\SAML2\XML\md\KeyDescriptor $kd)
{
$r = array();
if ($kd->use === 'encryption') {
$r['encryption'] = true;
$r['signing'] = false;
} elseif ($kd->use === 'signing') {
$r['encryption'] = false;
$r['signing'] = true;
} else {
$r['encryption'] = true;
$r['signing'] = true; }
$keyInfo = $kd->KeyInfo;
foreach ($keyInfo->info as $i) {
if ($i instanceof \SAML2\XML\ds\X509Data) {
foreach ($i->data as $d) {
if ($d instanceof \SAML2\XML\ds\X509Certificate) {
$r['type'] = 'X509Certificate';
$r['X509Certificate'] = $d->certificate;
return $r;
}
}
}
}
return null;
}
/**
* This function finds SP descriptors which supports one of the given protocols.
*
* @param $protocols Array with the protocols we accept.
*
* @return Array with SP descriptors which supports one of the given protocols.
*/
private function getSPDescriptors($protocols)
{
assert(is_array($protocols));
$ret = array();
foreach ($this->spDescriptors as $spd) {
$sharedProtocols = array_intersect($protocols, $spd['protocols']);
if (count($sharedProtocols) > 0) {
$ret[] = $spd;
}
}
return $ret;
}
/**
* This function finds IdP descriptors which supports one of the given protocols.
*
* @param $protocols Array with the protocols we accept.
*
* @return Array with IdP descriptors which supports one of the given protocols.
*/
private function getIdPDescriptors($protocols)
{
assert(is_array($protocols));
$ret = array();
foreach ($this->idpDescriptors as $idpd) {
$sharedProtocols = array_intersect($protocols, $idpd['protocols']);
if (count($sharedProtocols) > 0) {
$ret[] = $idpd;
}
}
return $ret;
}
/**
* This function locates the EntityDescriptor node in a DOMDocument. This node should * be the first (and only) node in the document.
*
* This function will throw an exception if it is unable to locate the node.
*
* @param DOMDocument $doc The DOMDocument where we should find the EntityDescriptor node.
*
* @return \SAML2\XML\md\EntityDescriptor The DOMEntity which represents the EntityDescriptor.
* @throws Exception If the document is empty or the first element is not an EntityDescriptor element.
*/
private static function findEntityDescriptor($doc)
{
assert($doc instanceof DOMDocument);
// find the EntityDescriptor DOMElement. This should be the first (and only) child of the DOMDocument
$ed = $doc->documentElement;
if ($ed === null) {
throw new Exception('Failed to load SAML metadata from empty XML document.');
}
if (SimpleSAML\Utils\XML::isDOMNodeOfType($ed, 'EntityDescriptor', '@md') === false) {
throw new Exception('Expected first element in the metadata document to be an EntityDescriptor element.');
}
return new \SAML2\XML\md\EntityDescriptor($ed);
}
/**
* If this EntityDescriptor was signed this function use the public key to check the signature.
*
* @param array $certificates One ore more certificates with the public key. This makes it possible
* to do a key rollover.
*
* @return boolean True if it is possible to check the signature with the certificate, false otherwise.
* @throws Exception If the certificate file cannot be found.
*/
public function validateSignature($certificates)
{
foreach ($certificates as $cert) {
assert(is_string($cert));
$certFile = \SimpleSAML\Utils\Config::getCertPath($cert);
if (!file_exists($certFile)) {
throw new Exception(
'Could not find certificate file ['.$certFile.'], which is needed to validate signature'
);
}
$certData = file_get_contents($certFile);
foreach ($this->validators as $validator) {
$key = new XMLSecurityKey(XMLSecurityKey::RSA_SHA1, array('type' => 'public'));
$key->loadKey($certData);
try {
if ($validator->validate($key)) {
return true;
}
} catch (Exception $e) {
// this certificate did not sign this element, skip
}
}
}
SimpleSAML\Logger::debug('Could not validate signature');
return false;
}
/**
* This function checks if this EntityDescriptor was signed with a certificate with the
* given fingerprint.
* * @param string $fingerprint Fingerprint of the certificate which should have been used to sign this
* EntityDescriptor.
*
* @return boolean True if it was signed with the certificate with the given fingerprint, false otherwise.
*/
public function validateFingerprint($fingerprint)
{
assert(is_string($fingerprint));
$fingerprint = strtolower(str_replace(":", "", $fingerprint));
$candidates = array();
foreach ($this->validators as $validator) {
foreach ($validator->getValidatingCertificates() as $cert) {
$fp = strtolower(sha1(base64_decode($cert)));
$candidates[] = $fp;
if ($fp === $fingerprint) {
return true;
}
}
}
SimpleSAML\Logger::debug('Fingerprint was ['.$fingerprint.'] not one of ['.join(', ', $candidates).']');
return false;
}
}