nextcloud/apps/user_openid/appinfo/app.php

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PHP
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<?php
//check if curl extension installed
if (!in_array ('curl', get_loaded_extensions())){
return;
}
$userName='';
if(strpos($_SERVER["REQUEST_URI"],'?') and !strpos($_SERVER["REQUEST_URI"],'=')){
if(strpos($_SERVER["REQUEST_URI"],'/?')){
$userName=substr($_SERVER["REQUEST_URI"],strpos($_SERVER["REQUEST_URI"],'/?')+2);
}elseif(strpos($_SERVER["REQUEST_URI"],'.php?')){
$userName=substr($_SERVER["REQUEST_URI"],strpos($_SERVER["REQUEST_URI"],'.php?')+5);
}
}
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OCP\Util::addHeader('link',array('rel'=>'openid.server', 'href'=>OCP\Util::linkToAbsolute( "user_openid", "user.php" ).'/'.$userName));
OCP\Util::addHeader('link',array('rel'=>'openid.delegate', 'href'=>OCP\Util::linkToAbsolute( "user_openid", "user.php" ).'/'.$userName));
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OCP\App::registerPersonal('user_openid','settings');
require_once 'apps/user_openid/user_openid.php';
//active the openid backend
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OC_User::useBackend('openid');
//check for results from openid requests
if(isset($_GET['openid_mode']) and $_GET['openid_mode'] == 'id_res'){
OCP\Util::writeLog('user_openid','openid retured',OCP\Util::DEBUG);
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$openid = new SimpleOpenID();
$openid->SetIdentity($_GET['openid_identity']);
$openid_validation_result = $openid->ValidateWithServer();
if ($openid_validation_result == true){ // OK HERE KEY IS VALID
OCP\Util::writeLog('user_openid','auth sucessfull',OCP\Util::DEBUG);
$identity=$openid->GetIdentity();
OCP\Util::writeLog('user_openid','auth as '.$identity,OCP\Util::DEBUG);
$user=OC_USER_OPENID::findUserForIdentity($identity);
if($user){
$_SESSION['user_id']=$user;
header("Location: ".OC::$WEBROOT);
}
}else if($openid->IsError() == true){ // ON THE WAY, WE GOT SOME ERROR
$error = $openid->GetError();
OCP\Util::writeLog('user_openid','ERROR CODE: '. $error['code'],OCP\Util::ERROR);
OCP\Util::writeLog('user_openid','ERROR DESCRIPTION: '. $error['description'],OCP\Util::ERROR);
}else{ // Signature Verification Failed
OCP\Util::writeLog('user_openid','INVALID AUTHORIZATION',OCP\Util::ERROR);
}
}else if (isset($_GET['openid_mode']) and $_GET['openid_mode'] == 'cancel'){ // User Canceled your Request
OCP\Util::writeLog('user_openid','USER CANCELED REQUEST',OCP\Util::DEBUG);
return false;
}