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Diffstat (limited to 'wiki/lib/plugins/auth.php')
| -rw-r--r-- | wiki/lib/plugins/auth.php | 438 |
1 files changed, 438 insertions, 0 deletions
diff --git a/wiki/lib/plugins/auth.php b/wiki/lib/plugins/auth.php new file mode 100644 index 0000000..0cd965b --- /dev/null +++ b/wiki/lib/plugins/auth.php @@ -0,0 +1,438 @@ +<?php +// must be run within Dokuwiki +if(!defined('DOKU_INC')) die(); + +/** + * Auth Plugin Prototype + * + * foundation authorisation class + * all auth classes should inherit from this class + * + * @license GPL 2 (http://www.gnu.org/licenses/gpl.html) + * @author Chris Smith <chris@jalakai.co.uk> + * @author Jan Schumann <js@jschumann-it.com> + */ +class DokuWiki_Auth_Plugin extends DokuWiki_Plugin { + public $success = true; + + /** + * Possible things an auth backend module may be able to + * do. The things a backend can do need to be set to true + * in the constructor. + */ + protected $cando = array( + 'addUser' => false, // can Users be created? + 'delUser' => false, // can Users be deleted? + 'modLogin' => false, // can login names be changed? + 'modPass' => false, // can passwords be changed? + 'modName' => false, // can real names be changed? + 'modMail' => false, // can emails be changed? + 'modGroups' => false, // can groups be changed? + 'getUsers' => false, // can a (filtered) list of users be retrieved? + 'getUserCount' => false, // can the number of users be retrieved? + 'getGroups' => false, // can a list of available groups be retrieved? + 'external' => false, // does the module do external auth checking? + 'logout' => true, // can the user logout again? (eg. not possible with HTTP auth) + ); + + /** + * Constructor. + * + * Carry out sanity checks to ensure the object is + * able to operate. Set capabilities in $this->cando + * array here + * + * For future compatibility, sub classes should always include a call + * to parent::__constructor() in their constructors! + * + * Set $this->success to false if checks fail + * + * @author Christopher Smith <chris@jalakai.co.uk> + */ + public function __construct() { + // the base class constructor does nothing, derived class + // constructors do the real work + } + + /** + * Available Capabilities. [ DO NOT OVERRIDE ] + * + * For introspection/debugging + * + * @author Christopher Smith <chris@jalakai.co.uk> + * @return array + */ + public function getCapabilities(){ + return array_keys($this->cando); + } + + /** + * Capability check. [ DO NOT OVERRIDE ] + * + * Checks the capabilities set in the $this->cando array and + * some pseudo capabilities (shortcutting access to multiple + * ones) + * + * ususal capabilities start with lowercase letter + * shortcut capabilities start with uppercase letter + * + * @author Andreas Gohr <andi@splitbrain.org> + * @param string $cap the capability to check + * @return bool + */ + public function canDo($cap) { + switch($cap) { + case 'Profile': + // can at least one of the user's properties be changed? + return ($this->cando['modPass'] || + $this->cando['modName'] || + $this->cando['modMail']); + break; + case 'UserMod': + // can at least anything be changed? + return ($this->cando['modPass'] || + $this->cando['modName'] || + $this->cando['modMail'] || + $this->cando['modLogin'] || + $this->cando['modGroups'] || + $this->cando['modMail']); + break; + default: + // print a helping message for developers + if(!isset($this->cando[$cap])) { + msg("Check for unknown capability '$cap' - Do you use an outdated Plugin?", -1); + } + return $this->cando[$cap]; + } + } + + /** + * Trigger the AUTH_USERDATA_CHANGE event and call the modification function. [ DO NOT OVERRIDE ] + * + * You should use this function instead of calling createUser, modifyUser or + * deleteUsers directly. The event handlers can prevent the modification, for + * example for enforcing a user name schema. + * + * @author Gabriel Birke <birke@d-scribe.de> + * @param string $type Modification type ('create', 'modify', 'delete') + * @param array $params Parameters for the createUser, modifyUser or deleteUsers method. The content of this array depends on the modification type + * @return bool|null|int Result from the modification function or false if an event handler has canceled the action + */ + public function triggerUserMod($type, $params) { + $validTypes = array( + 'create' => 'createUser', + 'modify' => 'modifyUser', + 'delete' => 'deleteUsers' + ); + if(empty($validTypes[$type])) { + return false; + } + + $result = false; + $eventdata = array('type' => $type, 'params' => $params, 'modification_result' => null); + $evt = new Doku_Event('AUTH_USER_CHANGE', $eventdata); + if($evt->advise_before(true)) { + $result = call_user_func_array(array($this, $validTypes[$type]), $evt->data['params']); + $evt->data['modification_result'] = $result; + } + $evt->advise_after(); + unset($evt); + return $result; + } + + /** + * Log off the current user [ OPTIONAL ] + * + * Is run in addition to the ususal logoff method. Should + * only be needed when trustExternal is implemented. + * + * @see auth_logoff() + * @author Andreas Gohr <andi@splitbrain.org> + */ + public function logOff() { + } + + /** + * Do all authentication [ OPTIONAL ] + * + * Set $this->cando['external'] = true when implemented + * + * If this function is implemented it will be used to + * authenticate a user - all other DokuWiki internals + * will not be used for authenticating, thus + * implementing the checkPass() function is not needed + * anymore. + * + * The function can be used to authenticate against third + * party cookies or Apache auth mechanisms and replaces + * the auth_login() function + * + * The function will be called with or without a set + * username. If the Username is given it was called + * from the login form and the given credentials might + * need to be checked. If no username was given it + * the function needs to check if the user is logged in + * by other means (cookie, environment). + * + * The function needs to set some globals needed by + * DokuWiki like auth_login() does. + * + * @see auth_login() + * @author Andreas Gohr <andi@splitbrain.org> + * + * @param string $user Username + * @param string $pass Cleartext Password + * @param bool $sticky Cookie should not expire + * @return bool true on successful auth + */ + public function trustExternal($user, $pass, $sticky = false) { + /* some example: + + global $USERINFO; + global $conf; + $sticky ? $sticky = true : $sticky = false; //sanity check + + // do the checking here + + // set the globals if authed + $USERINFO['name'] = 'FIXME'; + $USERINFO['mail'] = 'FIXME'; + $USERINFO['grps'] = array('FIXME'); + $_SERVER['REMOTE_USER'] = $user; + $_SESSION[DOKU_COOKIE]['auth']['user'] = $user; + $_SESSION[DOKU_COOKIE]['auth']['pass'] = $pass; + $_SESSION[DOKU_COOKIE]['auth']['info'] = $USERINFO; + return true; + + */ + } + + /** + * Check user+password [ MUST BE OVERRIDDEN ] + * + * Checks if the given user exists and the given + * plaintext password is correct + * + * May be ommited if trustExternal is used. + * + * @author Andreas Gohr <andi@splitbrain.org> + * @param string $user the user name + * @param string $pass the clear text password + * @return bool + */ + public function checkPass($user, $pass) { + msg("no valid authorisation system in use", -1); + return false; + } + + /** + * Return user info [ MUST BE OVERRIDDEN ] + * + * Returns info about the given user needs to contain + * at least these fields: + * + * name string full name of the user + * mail string email address of the user + * grps array list of groups the user is in + * + * @author Andreas Gohr <andi@splitbrain.org> + * @param string $user the user name + * @param bool $requireGroups whether or not the returned data must include groups + * @return false|array containing user data or false + */ + public function getUserData($user, $requireGroups=true) { + if(!$this->cando['external']) msg("no valid authorisation system in use", -1); + return false; + } + + /** + * Create a new User [implement only where required/possible] + * + * Returns false if the user already exists, null when an error + * occurred and true if everything went well. + * + * The new user HAS TO be added to the default group by this + * function! + * + * Set addUser capability when implemented + * + * @author Andreas Gohr <andi@splitbrain.org> + * @param string $user + * @param string $pass + * @param string $name + * @param string $mail + * @param null|array $grps + * @return bool|null + */ + public function createUser($user, $pass, $name, $mail, $grps = null) { + msg("authorisation method does not allow creation of new users", -1); + return null; + } + + /** + * Modify user data [implement only where required/possible] + * + * Set the mod* capabilities according to the implemented features + * + * @author Chris Smith <chris@jalakai.co.uk> + * @param string $user nick of the user to be changed + * @param array $changes array of field/value pairs to be changed (password will be clear text) + * @return bool + */ + public function modifyUser($user, $changes) { + msg("authorisation method does not allow modifying of user data", -1); + return false; + } + + /** + * Delete one or more users [implement only where required/possible] + * + * Set delUser capability when implemented + * + * @author Chris Smith <chris@jalakai.co.uk> + * @param array $users + * @return int number of users deleted + */ + public function deleteUsers($users) { + msg("authorisation method does not allow deleting of users", -1); + return 0; + } + + /** + * Return a count of the number of user which meet $filter criteria + * [should be implemented whenever retrieveUsers is implemented] + * + * Set getUserCount capability when implemented + * + * @author Chris Smith <chris@jalakai.co.uk> + * @param array $filter array of field/pattern pairs, empty array for no filter + * @return int + */ + public function getUserCount($filter = array()) { + msg("authorisation method does not provide user counts", -1); + return 0; + } + + /** + * Bulk retrieval of user data [implement only where required/possible] + * + * Set getUsers capability when implemented + * + * @author Chris Smith <chris@jalakai.co.uk> + * @param int $start index of first user to be returned + * @param int $limit max number of users to be returned, 0 for unlimited + * @param array $filter array of field/pattern pairs, null for no filter + * @return array list of userinfo (refer getUserData for internal userinfo details) + */ + public function retrieveUsers($start = 0, $limit = 0, $filter = null) { + msg("authorisation method does not support mass retrieval of user data", -1); + return array(); + } + + /** + * Define a group [implement only where required/possible] + * + * Set addGroup capability when implemented + * + * @author Chris Smith <chris@jalakai.co.uk> + * @param string $group + * @return bool + */ + public function addGroup($group) { + msg("authorisation method does not support independent group creation", -1); + return false; + } + + /** + * Retrieve groups [implement only where required/possible] + * + * Set getGroups capability when implemented + * + * @author Chris Smith <chris@jalakai.co.uk> + * @param int $start + * @param int $limit + * @return array + */ + public function retrieveGroups($start = 0, $limit = 0) { + msg("authorisation method does not support group list retrieval", -1); + return array(); + } + + /** + * Return case sensitivity of the backend [OPTIONAL] + * + * When your backend is caseinsensitive (eg. you can login with USER and + * user) then you need to overwrite this method and return false + * + * @return bool + */ + public function isCaseSensitive() { + return true; + } + + /** + * Sanitize a given username [OPTIONAL] + * + * This function is applied to any user name that is given to + * the backend and should also be applied to any user name within + * the backend before returning it somewhere. + * + * This should be used to enforce username restrictions. + * + * @author Andreas Gohr <andi@splitbrain.org> + * @param string $user username + * @return string the cleaned username + */ + public function cleanUser($user) { + return $user; + } + + /** + * Sanitize a given groupname [OPTIONAL] + * + * This function is applied to any groupname that is given to + * the backend and should also be applied to any groupname within + * the backend before returning it somewhere. + * + * This should be used to enforce groupname restrictions. + * + * Groupnames are to be passed without a leading '@' here. + * + * @author Andreas Gohr <andi@splitbrain.org> + * @param string $group groupname + * @return string the cleaned groupname + */ + public function cleanGroup($group) { + return $group; + } + + /** + * Check Session Cache validity [implement only where required/possible] + * + * DokuWiki caches user info in the user's session for the timespan defined + * in $conf['auth_security_timeout']. + * + * This makes sure slow authentication backends do not slow down DokuWiki. + * This also means that changes to the user database will not be reflected + * on currently logged in users. + * + * To accommodate for this, the user manager plugin will touch a reference + * file whenever a change is submitted. This function compares the filetime + * of this reference file with the time stored in the session. + * + * This reference file mechanism does not reflect changes done directly in + * the backend's database through other means than the user manager plugin. + * + * Fast backends might want to return always false, to force rechecks on + * each page load. Others might want to use their own checking here. If + * unsure, do not override. + * + * @param string $user - The username + * @author Andreas Gohr <andi@splitbrain.org> + * @return bool + */ + public function useSessionCache($user) { + global $conf; + return ($_SESSION[DOKU_COOKIE]['auth']['time'] >= @filemtime($conf['cachedir'].'/sessionpurge')); + } +} |