1<?php
2/**
3 * DokuWiki envvars plugin
4 * https://www.dokuwiki.org/plugin:authenvvars
5 *
6 * @license GPL 3 http://www.gnu.org/licenses/gpl-3.0.html
7 * @author Christian Hoffmann <christian@lehrer-hoffmann.de>
8 */
9
10// must be run within Dokuwiki
11if(!defined('DOKU_INC')) die();
12
13class auth_plugin_authenvvars extends DokuWiki_Auth_Plugin {
14
15  /**
16   * Constructor.
17   */
18  public function __construct() {
19    # global $conf;
20
21    parent::__construct();
22
23    /* No support for logout in this auth plugin. */
24    $this->cando['logout'] = false;
25    /* This plugins uses it's own authentication. */
26    $this->cando['external'] = true;
27
28    $this->success = false;
29
30    /* Load the config */
31    $this->loadConfig();
32
33    try {
34      $this->userinfo = array();
35      $this->userinfo['userid'] = $_SERVER[$this->getConf('useridvar')];
36      if( empty($this->userinfo['userid']) ) {
37        throw new Exception( "userid empty. Please give correct envvar in useridvar." );
38      }
39      $this->userinfo['name']   = $_SERVER[$this->getConf('usernamevar')];
40      $this->userinfo['mail']   = $_SERVER[$this->getConf('emailvar')];
41      $this->userinfo['grps']   = $this->createGrouparray($this->getConf('groupsvar'),$this->getConf('groupattr'));
42    }
43    catch( Exception $e ) {
44      msg( $e->getMessage() );
45      return;
46    }
47
48    $this->success = true;
49  }
50
51  public function trustExternal($user, $pass, $sticky=false) {
52    global $USERINFO;
53
54    /* $user ignored */
55    $myuser = $this->userinfo['userid'];
56
57    $USERINFO['name'] = $this->userinfo['name'];
58    $USERINFO['mail'] = $this->userinfo['mail'];
59    $USERINFO['grps'] = $this->userinfo['grps'];
60
61    $_SERVER['REMOTE_USER']                = $myuser;
62    $_SESSION[DOKU_COOKIE]['auth']['user'] = $myuser;
63    $_SESSION[DOKU_COOKIE]['auth']['info'] = $USERINFO;
64
65    return true;
66  }
67
68  private function createGrouparray( $groupsvar, $groupattr ) {
69    $grouparr = array();
70    if( empty($groupsvar) ) {
71      return $grouparr;
72    }
73
74    foreach( json_decode($_SERVER[$groupsvar],true) as $key=>$value ) {
75      if( is_array( $value) ) {
76        if( ! array_key_exists( $groupattr, $value ) ) {
77          throw new Exception( $groupattr." is not an attribute." );
78        }
79        $grpvalue = $value[$groupattr];
80      }
81      else {
82        $grpvalue = $value;
83      }
84
85      if( ! is_string( $grpvalue) ) {
86        throw new Exception( "Groupvalue is not a string." );
87      }
88      $grouparr[] = $grpvalue;
89    }
90    return $grouparr;
91  }
92}
93