Sharing dialog returns duplicate entries

[rogerfv1]

Steps to reproduce

1. Configure ldap_expert_uuid_user_attr = uid on user_ldap plugin
2. Use numeric/values for uid atribute in LDAP Server

Expected behaviour

Sharing dialog should display unique users/contacts.

Actual behaviour

Sharing dialog returns some duplicate users/contacts entries.

Server configuration

Operating system: Debian 8

Web server: Apache 2.4

Database: Postgresql 9.4

PHP version: php 5.6

Nextcloud version: 12.0.3

Are you using external storage, if yes which one: no

Are you using encryption: no

Are you using an external user-backend, if yes which one: LDAP

We looked at the source code and we found a issue when using numeric/integer values for 'uid'.
An array of users, groups and contacts is created on every search. Before it is shown to the enduser, the array values are compared in search of duplicated entries. The function "hasUserInResult" isn't working properly when the uid attribute from AD/LDAP is a integer. The problem seems to be that PHP is type casting the LDAP attribute 'uid' from string to integer.

File: /var/www/nextcloud/apps/files_sharing/lib/Controller/ShareesAPIController.php

    protected function hasUserInResult($userId) {
            foreach ($this->result['exact']['users'] as $result) {
                    if ($result['value']['shareWith'] === $userId) {
                            return true;
                    }
            }
            foreach ($this->result['users'] as $result) {
                    if ($result['value']['shareWith'] === $userId) { //  <---- sometimes we get identical values but different types INTEGER  === STRING
                            return true;
                    }
            }
            return false;
    }

    protected function getUsers($search) {
                    .....
                    .....
                    // Search in all users
                    $usersTmp = $this->userManager->searchDisplayName($search, $this->limit, $this->offset);

                    foreach ($usersTmp as $user) {
                            $users[$user->getUID()] = $user->getDisplayName();  //  <---- creating keys with type integer
                    }
                    .....
                    .....
    }

Example Code to simulate the issue:

<?php
$all = Array (
    'users' => Array (
                 0 => Array (
                     'label' => 'Mary',
                     'value' => Array ( 'shareType' => 0, 'shareWith' => '02222222222' )
                 ),
                 1 => Array (
                     'label' => 'Jean',
                     'value' => Array ( 'shareType' => 0, 'shareWith' => '22222222222' )
                 )
             )
         );
foreach ($all['users'] as $user) {
  $uid = $user['value']['shareWith'];
  $users[$uid] = 'nome';
}
foreach ($users as $key => $value) {
  echo "keyValue:".$key." keyType:".gettype($key)."\n";
}
?>

Workaround:

Maybe change the comparison operator in hasUserInResult function to "==".
$result['value']['shareWith'] == $userId

[rogerfv1]

Hi,

We can reproduce creating local accounts.

Steps to reproduce:

1. Create a local user.
   Username: 22222222222
   Password: password@123

2. Add a Email to account.
   Email: 22222222222@domain.com

3. Search by "22222222222" in sharing dialog.

[blizzz]

Use numeric/values for uid atribute in LDAP Server

@nickvergessen wasnt there a fix about numerical usernames recently?

[snab]

We have the same issue, but with slightly different config:

• Nextcloud 12.0.4, on Nextcloud 12.0.0 it was fine
• we use the USER_SQL Backend for users, all of them with numerical usernames as well.

The suggested workaround from the first post seems to work for us, but if it would be fixed upstream, it would be nice.

[snab]

This problem seems to be solved with Nextcloud 13. :-) 👍

[blizzz]

thansk for the feedback!