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<?php |
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namespace SimpleSAML\Module\authorize\Auth\Process; |
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use SimpleSAML\Auth\State; |
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use SimpleSAML\Module; |
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use SimpleSAML\Utils\Arrays; |
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use SimpleSAML\Utils\HTTP; |
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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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* @author Ernesto Revilla, Yaco Sistemas SL., Ryan Panning |
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* @package SimpleSAMLphp |
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*/ |
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class Authorize extends \SimpleSAML\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 bool |
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*/ |
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protected $deny = false; |
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/** |
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* Flag to turn the REGEX pattern matching on or off |
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* |
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* @var bool |
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*/ |
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protected $regex = true; |
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/** |
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* Array of localised rejection messages |
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* |
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* @var array |
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*/ |
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protected $reject_msg = []; |
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/** |
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* Array of valid users. Each element is a regular expression. You should |
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* user \ to escape special chars, like '.' etc. |
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* |
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*/ |
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protected $valid_attribute_values = []; |
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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 $reserved For future use. |
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*/ |
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public function __construct($config, $reserved) |
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{ |
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parent::__construct($config, $reserved); |
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Assert::isArray($config); |
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// Check for the deny option |
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// Must be bool specifically, if not, it might be for an attrib filter below |
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if (isset($config['deny']) && is_bool($config['deny'])) { |
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$this->deny = $config['deny']; |
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} |
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// Check for the regex option |
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// Must be bool specifically, if not, it might be for an attrib filter below |
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if (isset($config['regex']) && is_bool($config['regex'])) { |
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$this->regex = $config['regex']; |
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} |
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// Check for the reject_msg option; Must be array of languages |
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if (isset($config['reject_msg']) && is_array($config['reject_msg'])) { |
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$this->reject_msg = $config['reject_msg']; |
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} |
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// Remove all above options |
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unset($config['deny'], $config['regex'], $config['reject_msg']); |
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foreach ($config as $attribute => $values) { |
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if (is_string($values)) { |
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$values = Arrays::arrayize($values); |
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} else if (!is_array($values)) { |
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throw new \Exception( |
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'Filter Authorize: Attribute values is neither string nor array: '.var_export($attribute, true) |
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); |
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} |
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foreach ($values as $value) { |
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if (!is_string($value)) { |
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throw new \Exception( |
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'Filter Authorize: Each value should be a string for attribute: '.var_export($attribute, true). |
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' value: '.var_export($value, true).' Config is: '.var_export($config, true) |
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); |
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} |
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} |
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$this->valid_attribute_values[$attribute] = $values; |
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} |
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} |
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/** |
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* Apply filter to validate attributes. |
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* |
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* @param array &$request The current request |
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* @return void |
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*/ |
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public function process(&$request) |
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{ |
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Assert::isArray($request); |
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Assert::keyExists($request, 'Attributes'); |
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$authorize = $this->deny; |
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$attributes = &$request['Attributes']; |
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// Store the rejection message array in the $request |
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if (!empty($this->reject_msg)) { |
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$request['authprocAuthorize_reject_msg'] = $this->reject_msg; |
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} |
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foreach ($this->valid_attribute_values as $name => $patterns) { |
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if (array_key_exists($name, $attributes)) { |
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foreach ($patterns as $pattern) { |
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$values = Arrays::arrayize($attributes[$name]); |
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foreach ($values as $value) { |
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if ($this->regex) { |
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$matched = preg_match($pattern, $value); |
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} else { |
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$matched = ($value == $pattern); |
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} |
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if ($matched) { |
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$authorize = ($this->deny ? false : true); |
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break 3; |
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} |
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} |
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} |
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} |
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} |
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if (!$authorize) { |
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$this->unauthorized($request); |
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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 $request |
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* @return void |
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*/ |
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protected function unauthorized(&$request) |
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{ |
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// Save state and redirect to 403 page |
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$id = State::saveState($request, 'authorize:Authorize'); |
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$url = Module::getModuleURL('authorize/authorize_403.php'); |
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HTTP::redirectTrustedURL($url, ['StateId' => $id]); |
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} |
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} |
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simplesamlphp /
simplesamlphp-module-authorize
