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<?php |
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namespace SimpleSAML\Module\authorizebydest\Auth\Process; |
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use SimpleSAML\Auth; |
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use SimpleSAML\Error\CriticalConfigurationError; |
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use SimpleSAML\Logger; |
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use SimpleSAML\Module; |
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use SimpleSAML\Utils; |
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use Webmozart\Assert\Assert; |
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/** |
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* Filter to authorize only certain users. |
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* See docs directory. |
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* |
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* @package SimpleSAMLphp |
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*/ |
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class AuthorizeByDest extends Auth\ProcessingFilter |
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{ |
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/** |
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* Flag to deny/unauthorize the user a attribute filter IS found |
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* |
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* @var string |
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*/ |
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protected $attribute; |
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/** |
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* @var string |
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*/ |
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protected $attribute_value; |
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/** |
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* @var array |
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*/ |
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protected $destination_whitelist = []; |
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/** |
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* @var string |
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*/ |
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protected $distinguish_attribute; |
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/** |
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* @var array |
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*/ |
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protected $distinguish_users = []; |
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/** |
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* Initialize this filter. |
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* Validate configuration parameters. |
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* |
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* @param array $config Configuration information about this filter. |
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* @param mixed $reserved For future use. |
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* |
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* @throws CriticalConfigurationError |
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*/ |
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public function __construct(array $config, $reserved) |
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{ |
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parent::__construct($config, $reserved); |
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if (isset($config['attribute']) && is_string($config['attribute'])) { |
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$this->attribute = $config['attribute']; |
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} else { |
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$reason = 'There is no attribute config in authorizeByDest authproc filter'; |
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throw new CriticalConfigurationError($reason); |
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} |
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if (isset($config['attribute_value']) && is_string($config['attribute_value'])) { |
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$this->attribute_value = $config['attribute_value']; |
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} else { |
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$reason = 'There is no attribute_value config in authorizeByDest authproc filter'; |
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throw new CriticalConfigurationError($reason); |
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} |
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if (isset($config['destination_whitelist']) && is_array($config['destination_whitelist'])) { |
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$this->destination_whitelist = $config['destination_whitelist']; |
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} else { |
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$reason = 'There is no destination_whitelist config in authorizeByDest authproc filter'; |
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throw new CriticalConfigurationError($reason); |
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} |
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if (isset($config['distinguish_attribute']) && is_string($config['distinguish_attribute'])) { |
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$this->distinguish_attribute = $config['distinguish_attribute']; |
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} |
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if (isset($config['distinguish_users']) && is_array($config['distinguish_users'])) { |
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$this->distinguish_users = $config['distinguish_users']; |
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} |
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if (isset($this->distinguish_users) and !isset($this->distinguish_attribute)) { |
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$reason = 'You have to define distinguish attribute in authorizeByDest authproc filter'; |
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throw new CriticalConfigurationError($reason); |
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} |
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} |
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/** |
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* Apply filter to validate dest and user. |
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* |
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* @param array &$request The current request |
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*/ |
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public function process(&$request) |
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{ |
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Assert::keyExists($request, 'Attributes'); |
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Assert::keyExists($request, 'SPMetadata'); |
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Assert::keyExists($request['SPMetadata'], 'entityid'); |
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$attributes = $request['Attributes']; |
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$destination = $request['SPMetadata']['entityid']; |
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Logger::debug("AuthorizeByDest distinguish values: " . json_encode([ |
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$this->distinguish_attribute, |
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$attributes[$this->distinguish_attribute], |
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$this->distinguish_users, |
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])); |
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if (!empty($attributes[$this->distinguish_attribute]) |
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&& empty(array_intersect($attributes[$this->distinguish_attribute], $this->distinguish_users)) |
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) { |
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if (!empty($attributes[$this->attribute]) && in_array($this->attribute_value, $attributes[$this->attribute])) { |
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if (!in_array($destination, $this->destination_whitelist)) { |
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$this->unauthorized($request); |
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} |
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} |
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} |
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} |
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/** |
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* When the process logic determines that the user is not |
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* authorized for this service, then forward the user to |
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* an 403 unauthorized page. |
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* |
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* Separated this code into its own method so that child |
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* classes can override it and change the action. Forward |
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* thinking in case a "chained" ACL is needed, more complex |
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* permission logic. |
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* |
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* @param array $request |
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*/ |
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protected function unauthorized(&$request) |
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{ |
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// Save state and redirect to 403 page |
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$id = Auth\State::saveState($request, 'authorizebydest:AuthorizeByDest'); |
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$url = Module::getModuleURL('authorizebydest/authorize_403.php'); |
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Utils\HTTP::redirectTrustedURL($url, ['StateId' => $id]); |
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} |
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} |
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szabogyula /
simplesamlphp-module-authorizebydest
