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<?php |
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/** |
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* This base LDAP filter class can be extended to enable real filter classes direct access |
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* access to the authsource ldap config and connects to the ldap server. |
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* |
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* @package simplesamlphp/simplesamlphp-module-ldap |
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*/ |
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declare(strict_types=1); |
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namespace SimpleSAML\Module\ldap\Auth\Process; |
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use SimpleSAML\{Auth, Configuration, Error, Logger}; |
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use SimpleSAML\Assert\Assert; |
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use SimpleSAML\Module\ldap\Connector; |
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use SimpleSAML\Module\ldap\ConnectorInterface; |
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abstract class BaseFilter extends Auth\ProcessingFilter |
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{ |
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// TODO: Support ldap:LDAPMulti, if possible |
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protected static array $ldapsources = ['ldap:Ldap', 'authX509:X509userCert']; |
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/** |
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* List of attribute "alias's" linked to the real attribute |
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* name. Used for abstraction / configuration of the LDAP |
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* attribute names, which may change between dir service. |
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* |
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* @var array |
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*/ |
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protected array $attribute_map; |
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/** |
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* The base DN of the LDAP connection. Used when searching the LDAP server. |
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* |
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* @var array |
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*/ |
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protected array $searchBase; |
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/** |
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* The construct method will change the filter config into |
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* a \SimpleSAML\Configuration object and store it here for |
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* later use, if needed. |
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* |
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* @var \SimpleSAML\Configuration |
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*/ |
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protected Configuration $config; |
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/** |
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* Array of LDAP connection objects. Stored here to be accessed later during processing. |
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* |
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* @var \SimpleSAML\Module\ldap\ConnectorInterface |
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*/ |
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protected ConnectorInterface $connector; |
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/** |
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* The class "title" used in logging and exception messages. |
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* This should be prepended to the beginning of the message. |
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* |
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* @var string |
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*/ |
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protected string $title = 'ldap:BaseFilter'; |
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/** |
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* List of LDAP object types, used to determine the type of |
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* object that a DN references. |
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* |
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* @var array |
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*/ |
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protected array $type_map; |
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/** |
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* Checks the authsource, if defined, for configuration values |
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* to the LDAP server. Then sets up the LDAP connection for the |
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* instance/object and stores everything in class members. |
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* |
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* @throws \SimpleSAML\Error\Exception |
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* @param array &$config |
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* @param mixed $reserved |
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*/ |
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public function __construct(array &$config, $reserved) |
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{ |
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parent::__construct($config, $reserved); |
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// Change the class $title to match it's true name |
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// This way if the class is extended the proper name is used |
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$classname = get_class($this); |
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$classname = explode('_', $classname); |
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$this->title = 'ldap:' . end($classname); |
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// Log the construction |
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Logger::debug(sprintf('%s : Creating and configuring the filter.', $this->title)); |
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// If an authsource was defined (an not empty string)... |
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if (isset($config['authsource']) && $config['authsource'] !== '') { |
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$authconfig = $this->parseAuthSourceConfig($config['authsource']); |
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// Merge the authsource config with the filter config, |
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// but have the filter config override the authsource config |
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$config = array_merge($authconfig, $config); |
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// Authsource complete |
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Logger::debug(sprintf( |
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'%s : Retrieved authsource [%s] configuration values: %s', |
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$this->title, |
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$config['authsource'], |
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$this->varExport($authconfig) |
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)); |
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} |
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// Convert the config array to a config class, |
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// that way we can verify type and define defaults. |
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// Store in the instance in-case needed later, by a child class. |
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$this->config = Configuration::loadFromArray($config, 'ldap:AuthProcess'); |
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// Initialize the Ldap-object |
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$this->connector = $this->resolveConnector(); |
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// Set all the filter values, setting defaults if needed |
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$this->searchBase = $this->config->getOptionalArray('search.base', []); |
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// Log the member values retrieved above |
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Logger::debug(sprintf( |
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'%s : Configuration values retrieved; BaseDN: %s', |
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$this->title, |
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$this->varExport($this->searchBase) |
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)); |
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// Setup the attribute map which will be used to search LDAP |
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$this->attribute_map = [ |
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'dn' => $this->config->getOptionalString('attribute.dn', 'distinguishedName'), |
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'groups' => $this->config->getOptionalString('attribute.groups', 'groups'), |
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'member' => $this->config->getOptionalString('attribute.member', 'member'), |
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'memberOf' => $this->config->getOptionalString('attribute.memberOf', 'memberOf'), |
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'name' => $this->config->getOptionalString('attribute.groupname', 'name'), |
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'return' => $this->config->getOptionalString('attribute.return', 'distinguishedName'), |
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'type' => $this->config->getOptionalString('attribute.type', 'objectClass'), |
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'username' => $this->config->getOptionalString('attribute.username', 'sAMAccountName') |
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]; |
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// Log the attribute map |
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Logger::debug(sprintf( |
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'%s : Attribute map created: $s', |
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$this->title, |
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$this->varExport($this->attribute_map) |
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)); |
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// Setup the object type map which is used to determine a DNs' type |
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$this->type_map = [ |
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'group' => $this->config->getOptionalString('type.group', 'group'), |
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'user' => $this->config->getOptionalString('type.user', 'user') |
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]; |
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// Log the type map |
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Logger::debug(sprintf( |
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'%s : Type map created: %s', |
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$this->title, |
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$this->varExport($this->type_map) |
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)); |
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} |
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/** |
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* Parse authsource config |
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* |
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* @param string $as The name of the authsource |
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*/ |
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private function parseAuthSourceConfig(string $as): array |
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{ |
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// Log the authsource request |
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Logger::debug(sprintf( |
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'%s : Attempting to get configuration values from authsource [%s]', |
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$this->title, |
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$as |
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)); |
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// Get the authsources file, which should contain the config |
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$authsources = Configuration::getConfig('authsources.php'); |
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// Verify that the authsource config exists |
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if (!$authsources->hasValue($as)) { |
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throw new Error\Exception(sprintf( |
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'%s : Authsource [%s] defined in filter parameters not found in authsources.php', |
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$this->title, |
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$as |
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)); |
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} |
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// Get just the specified authsource config values |
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$authsource = $authsources->getArray($as); |
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// Make sure it is an ldap source |
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if (isset($authsource[0]) && !in_array($authsource[0], self::$ldapsources)) { |
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throw new Error\Exception(sprintf( |
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'%s : Authsource [%s] specified in filter parameters is not an ldap:LDAP type', |
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$this->title, |
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$as |
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)); |
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} |
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// Build the authsource config |
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$authconfig = []; |
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if (isset($authsource['connection_string'])) { |
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$authconfig['connection_string'] = $authsource['connection_string']; |
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} |
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if (isset($authsource['encryption'])) { |
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$authconfig['encryption'] = $authsource['encryption']; |
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} |
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if (isset($authsource['version'])) { |
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$authconfig['version'] = $authsource['version']; |
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} |
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if (isset($authsource['timeout'])) { |
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$authconfig['timeout'] = $authsource['timeout']; |
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} |
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if (isset($authsource['debug'])) { |
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$authconfig['debug'] = $authsource['debug']; |
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} |
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if (isset($authsource['referrals'])) { |
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$authconfig['referrals'] = $authsource['referrals']; |
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} |
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// only set when search.enabled = true |
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if (isset($authsource['search.enable']) && ($authsource['search.enable'] === true)) { |
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if (isset($authsource['search.base'])) { |
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$authconfig['search.base'] = $authsource['search.base']; |
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} |
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if (isset($authsource['search.scope'])) { |
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$authconfig['search.scope'] = $authsource['search.scope']; |
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} |
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if (isset($authsource['search.username'])) { |
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$authconfig['search.username'] = $authsource['search.username']; |
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} |
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if (isset($authsource['search.password'])) { |
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$authconfig['search.password'] = $authsource['search.password']; |
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} |
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// Only set the username attribute if the authsource specifies one attribute |
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if ( |
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isset($authsource['search.attributes']) |
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&& is_array($authsource['search.attributes']) |
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&& count($authsource['search.attributes']) == 1 |
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) { |
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$authconfig['attribute.username'] = reset($authsource['search.attributes']); |
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} |
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} |
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// only set when priv.read = true |
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if (isset($authsource['priv.read']) && $authsource['priv.read']) { |
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if (isset($authsource['priv.username'])) { |
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$authconfig['priv.username'] = $authsource['priv.username']; |
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} |
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if (isset($authsource['priv.password'])) { |
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$authconfig['priv.password'] = $authsource['priv.password']; |
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} |
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} |
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return $authconfig; |
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} |
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/** |
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* Resolve the connector |
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* |
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* @return \SimpleSAML\Module\ldap\ConnectorInterface |
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* @throws \Exception |
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*/ |
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protected function resolveConnector(): ConnectorInterface |
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{ |
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if (!empty($this->connector)) { |
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return $this->connector; |
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} |
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$encryption = $this->config->getString('encryption', 'ssl'); |
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Assert::oneOf($encryption, ['none', 'ssl', 'tls']); |
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$version = $this->config->getInteger('version', 3); |
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Assert::positiveInteger($version); |
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$class = $this->config->getString('connector', Connector\Ldap::class); |
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Assert::classExists($class); |
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return $this->connector = new $class( |
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$this->config->getString('connection_string'), |
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$this->config->getOptionalString('encryption', 'ssl'), |
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$this->config->getOptionalInteger('version', 3), |
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$this->config->getOptionalString('extension', 'ext_ldap'), |
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$this->config->getOptionalBoolean('debug', false), |
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[ |
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'network_timeout' => $this->config->getOptionalInteger('timeout', 3), |
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'referrals' => $this->config->getOptionalBoolean('referrals', false), |
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] |
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); |
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} |
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/** |
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* Local utility function to get details about a variable, |
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* basically converting it to a string to be used in a log |
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* message. The var_export() function returns several lines |
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* so this will remove the new lines and trim each line. |
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* |
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* @param mixed $value |
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* @return string |
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*/ |
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protected function varExport($value): string |
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{ |
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if (is_array($value)) { |
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// remove sensitive data |
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foreach ($value as $key => &$val) { |
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if ($key === 'search.password') { |
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$val = empty($val) ? '' : '********'; |
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} |
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} |
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unset($val); |
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} |
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$export = var_export($value, true); |
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$lines = explode("\n", $export); |
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|
|
foreach ($lines as &$line) { |
|
321
|
|
|
$line = trim($line); |
|
322
|
|
|
} |
|
323
|
|
|
return implode(' ', $lines); |
|
324
|
|
|
} |
|
325
|
|
|
} |
|
326
|
|
|
|
simplesamlphp /
simplesamlphp-module-ldap
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This check compares calls to functions or methods with their respective definitions. If the call has more arguments than are defined, it raises an issue.
If a function is defined several times with a different number of parameters, the check may pick up the wrong definition and report false positives. One codebase where this has been known to happen is Wordpress. Please note the @ignore annotation hint above.