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<?php
/**
* Authentication processing filter to generate a persistent NameID.
*
* @package SimpleSAMLphp
*/
class sspmod_saml_Auth_Process_SQLPersistentNameID extends sspmod_saml_BaseNameIDGenerator
{
/**
* Which attribute contains the unique identifier of the user.
*
* @var string
*/
private $attribute;
/**
* Whether we should create a persistent NameID if not explicitly requested (as saml:PersistentNameID does).
*
* @var boolean
*/
private $allowUnspecified = false;
/**
* Whether we should create a persistent NameID if a different format is requested.
*
* @var boolean
*/
private $allowDifferent = false;
/**
* Whether we should ignore allowCreate in the NameID policy
*
* @var boolean
*/
private $alwaysCreate = false;
/**
* Initialize this filter, parse configuration.
*
* @param array $config Configuration information about this filter.
* @param mixed $reserved For future use.
*
* @throws SimpleSAML_Error_Exception If the 'attribute' option is not specified.
*/
public function __construct($config, $reserved)
{
parent::__construct($config, $reserved);
assert('is_array($config)');
$this->format = \SAML2\Constants::NAMEID_PERSISTENT;
if (!isset($config['attribute'])) {
throw new SimpleSAML_Error_Exception("PersistentNameID: Missing required option 'attribute'.");
}
$this->attribute = $config['attribute'];
if (isset($config['allowUnspecified'])) {
$this->allowUnspecified = (bool) $config['allowUnspecified'];
}
if (isset($config['allowDifferent'])) {
$this->allowDifferent = (bool) $config['allowDifferent'];
}
if (isset($config['alwaysCreate'])) {
$this->alwaysCreate = (bool) $config['alwaysCreate'];
}
}
/**
* Get the NameID value.
*
* @param array $state The state array.
* @return string|null The NameID value.
*
* @throws sspmod_saml_Error if the NameID creation policy is invalid.
*/
protected function getValue(array &$state)
{
if (!isset($state['saml:NameIDFormat']) && !$this->allowUnspecified) {
SimpleSAML\Logger::debug(
'SQLPersistentNameID: Request did not specify persistent NameID format, '.
'not generating persistent NameID.'
);
return null;
}
$validNameIdFormats = @array_filter(array(
$state['saml:NameIDFormat'],
$state['SPMetadata']['NameIDPolicy'],
$state['SPMetadata']['NameIDFormat']
));
if (count($validNameIdFormats) && !in_array($this->format, $validNameIdFormats) && !$this->allowDifferent) {
SimpleSAML\Logger::debug(
'SQLPersistentNameID: SP expects different NameID format ('.
implode(', ', $validNameIdFormats).'), not generating persistent NameID.'
);
return null;
}
if (!isset($state['Destination']['entityid'])) {
SimpleSAML\Logger::warning('SQLPersistentNameID: No SP entity ID - not generating persistent NameID.');
return null;
}
$spEntityId = $state['Destination']['entityid'];
if (!isset($state['Source']['entityid'])) {
SimpleSAML\Logger::warning('SQLPersistentNameID: No IdP entity ID - not generating persistent NameID.');
return null;
}
$idpEntityId = $state['Source']['entityid'];
if (!isset($state['Attributes'][$this->attribute]) || count($state['Attributes'][$this->attribute]) === 0) {
SimpleSAML\Logger::warning(
'SQLPersistentNameID: Missing attribute '.var_export($this->attribute, true).
' on user - not generating persistent NameID.'
);
return null;
}
if (count($state['Attributes'][$this->attribute]) > 1) {
SimpleSAML\Logger::warning(
'SQLPersistentNameID: More than one value in attribute '.var_export($this->attribute, true).
' on user - not generating persistent NameID.'
);
return null;
}
$uid = array_values($state['Attributes'][$this->attribute]); // just in case the first index is no longer 0
$uid = $uid[0];
$value = sspmod_saml_IdP_SQLNameID::get($idpEntityId, $spEntityId, $uid);
if ($value !== null) {
SimpleSAML\Logger::debug(
'SQLPersistentNameID: Found persistent NameID '.var_export($value, true).' for user '.
var_export($uid, true).'.'
);
return $value;
}
if ((!isset($state['saml:AllowCreate']) || !$state['saml:AllowCreate']) && !$this->alwaysCreate) {
SimpleSAML\Logger::warning(
'SQLPersistentNameID: Did not find persistent NameID for user, and not allowed to create new NameID.'
);
throw new sspmod_saml_Error(
\SAML2\Constants::STATUS_RESPONDER,
'urn:oasis:names:tc:SAML:2.0:status:InvalidNameIDPolicy'
);
}
$value = bin2hex(openssl_random_pseudo_bytes(20));
SimpleSAML\Logger::debug(
'SQLPersistentNameID: Created persistent NameID '.var_export($value, true).' for user '.
var_export($uid, true).'.'
);
sspmod_saml_IdP_SQLNameID::add($idpEntityId, $spEntityId, $uid, $value);
return $value;
}
}
|
