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<?php
namespace SimpleSAML\Module\authorize\Auth\Process;
use SimpleSAML\Auth\State;
use SimpleSAML\Module;
use SimpleSAML\Utils\Arrays;
use SimpleSAML\Utils\HTTP;
use SimpleSAML\Module\Authorize\Tests\Utils;
use Webmozart\Assert\Assert;
/**
* Filter to authorize only certain users.
* See docs directory.
*
* @author Ernesto Revilla, Yaco Sistemas SL., Ryan Panning
* @package SimpleSAMLphp
*/
class Authorize extends \SimpleSAML\Auth\ProcessingFilter
{
/**
* Flag to deny/unauthorize the user a attribute filter IS found
*
* @var bool
*/
protected $deny = false;
/**
* Flag to turn the REGEX pattern matching on or off
*
* @var bool
*/
protected $regex = true;
/**
* Array of localised rejection messages
*
* @var array
*/
protected $reject_msg = [];
/**
* Array of valid users. Each element is a regular expression. You should
* user \ to escape special chars, like '.' etc.
*
*/
protected $valid_attribute_values = [];
/**
* Initialize this filter.
* Validate configuration parameters.
*
* @param array $config Configuration information about this filter.
* @param mixed $reserved For future use.
*/
public function __construct($config, $reserved)
{
parent::__construct($config, $reserved);
assert(is_array($config));
// Check for the deny option
// Must be bool specifically, if not, it might be for an attrib filter below
if (isset($config['deny']) && is_bool($config['deny'])) {
$this->deny = $config['deny'];
}
// Check for the regex option
// Must be bool specifically, if not, it might be for an attrib filter below
if (isset($config['regex']) && is_bool($config['regex'])) {
$this->regex = $config['regex'];
}
// Check for the reject_msg option; Must be array of languages
if (isset($config['reject_msg']) && is_array($config['reject_msg'])) {
$this->reject_msg = $config['reject_msg'];
}
// Remove all above options
unset($config['deny'], $config['regex'], $config['reject_msg']);
foreach ($config as $attribute => $values) {
if (is_string($values)) {
$values = Arrays::arrayize($values);
} else if (!is_array($values)) {
throw new \Exception(
'Filter Authorize: Attribute values is neither string nor array: '.var_export($attribute, true)
);
}
foreach ($values as $value) {
if (!is_string($value)) {
throw new \Exception(
'Filter Authorize: Each value should be a string for attribute: '.var_export($attribute, true).
' value: '.var_export($value, true).' Config is: '.var_export($config, true)
);
}
}
$this->valid_attribute_values[$attribute] = $values;
}
}
/**
* Apply filter to validate attributes.
*
* @param array &$request The current request
* @return void
*/
public function process(&$request)
{
assert(is_array($request));
assert(array_key_exists('Attributes', $request));
$authorize = $this->deny;
$attributes = &$request['Attributes'];
// Store the rejection message array in the $request
if (!empty($this->reject_msg)) {
$request['authprocAuthorize_reject_msg'] = $this->reject_msg;
}
foreach ($this->valid_attribute_values as $name => $patterns) {
if (array_key_exists($name, $attributes)) {
foreach ($patterns as $pattern) {
$values = Arrays::arrayize($attributes[$name]);
foreach ($values as $value) {
if ($this->regex) {
$matched = preg_match($pattern, $value);
} else {
$matched = ($value == $pattern);
}
if ($matched) {
$authorize = ($this->deny ? false : true);
break 3;
}
}
}
}
}
if (!$authorize) {
$this->unauthorized($request);
}
}
/**
* When the process logic determines that the user is not
* authorized for this service, then forward the user to
* an 403 unauthorized page.
*
* Separated this code into its own method so that child
* classes can override it and change the action. Forward
* thinking in case a "chained" ACL is needed, more complex
* permission logic.
*
* @param array $request
* @return void
*/
protected function unauthorized(array &$request)
{
// Save state and redirect to 403 page
$id = State::saveState($request, 'authorize:Authorize');
$url = Module::getModuleURL('authorize/authorize_403.php');
HTTP::redirectTrustedURL($url, ['StateId' => $id]);
}
}
|
