Multi-value attributes (mail/groups) not handled correctly if using environment

オープン
#700 コメント 0 件 リアクション 0 件 担当者 0 名 GitHub で見る

メンテナーはふだん 1 日以内に返信

まだ誰も着手していません。

評価

難易度
3/5
見積もり時間
1〜2日
初心者へのやさしさ
45/100
issue の種類
バグ
明瞭さ
おおむね明確
活発さ
停滞
技術スタック
apache, php

調査の方向性

apps/user_saml/lib/UserBackend.php の getAttribute* 関数から始め、マッピングされた mail 属性と groups 属性について、環境変数の経路を追跡します。IdP の直接属性がどのように処理されるかを確認し、その後、環境変数の経路でセミコロン区切りの値が一貫して分割されるようにし、複数値属性が既存のマッピングを壊さずに個別に保存されることを確認します。

索引モデルが issue の本文から書いたものです。

説明

Steps to reproduce
  1. Configure user_saml with 'Use Environment variable'
  2. Configure an attribute mapping for mail and groups
  3. Log into your instance. If you have multiple groups and/or mail addresses, you can see in your personal information that they are not split into multiple values but treated as single values. This may even cause a crash if you are in many groups, because the database column is limited to 64 chars.
Expected behaviour

Multi-value attributes (delimited by semicolons) should be split. It works if not using the environment mechanism but connecting directly to an idp, but I want to integrate nextcloud into a federation, which requires the use of apache/mod_shib/shibd and environment variables.

Actual behaviour

Multi-value attributes are not split but treated as a single value, causing various problems.

I tracked that down to the behaviour of the getAttribute* functions in apps/user_saml/lib/UserBackend.php and I may be able to develop a workaround or clean fix, but of course this problem should be fixed in the official sources.

This bug makes the integration of Nextcloud into a Shibboleth-based federation impossible in many situations.

Server configuration

Operating system:

Ubuntu 22.04

Web server:

Apache 2.4.52

Database:

Postgresql 14

PHP version:

8.1

Nextcloud version: (see Nextcloud admin page)

25.0.3

Where did you install Nextcloud from:

?

List of activated apps:

  • activity: 2.17.0
  • admin_audit: 1.15.0
  • bruteforcesettings: 2.5.0
  • calendar: 4.2.3
  • circles: 25.0.0
  • cloud_federation_api: 1.8.0
  • comments: 1.15.0
  • contacts: 5.1.0
  • contactsinteraction: 1.6.0
  • dav: 1.24.0
  • deck: 1.8.3
  • federatedfilesharing: 1.15.0
  • federation: 1.15.0
  • files: 1.20.1
  • files_pdfviewer: 2.6.0
  • files_rightclick: 1.4.0
  • files_sharing: 1.17.0
  • files_trashbin: 1.15.0
  • files_versions: 1.18.0
  • issuetemplate: 0.7.0
  • logreader: 2.10.0
  • lookup_server_connector: 1.13.0
  • notes: 4.6.0
  • notifications: 2.13.1
  • oauth2: 1.13.0
  • password_policy: 1.15.0
  • photos: 2.0.1
  • privacy: 1.9.0
  • provisioning_api: 1.15.0
  • related_resources: 1.0.3
  • serverinfo: 1.15.0
  • settings: 1.7.0
  • sharebymail: 1.15.0
  • systemtags: 1.15.0
  • tasks: 0.14.5
  • text: 3.6.0
  • theming: 2.0.1
  • theming_customcss: 1.12.0
  • twofactor_backupcodes: 1.14.0
  • twofactor_totp: 7.0.0
  • updatenotification: 1.15.0
  • user_saml: 5.1.2
  • user_status: 1.5.0
  • viewer: 1.9.0
  • weather_status: 1.5.0
  • workflowengine: 2.7.0

Nextcloud configuration:

{
"system": {
"debug": true,
"instanceid": "REMOVED SENSITIVE VALUE",
"passwordsalt": "REMOVED SENSITIVE VALUE",
"secret": "REMOVED SENSITIVE VALUE",
"trusted_domains": [
"nc.uni-bremen.de",
"nextcloud.zfn.uni-bremen.de",
"nextcloud.uni-bremen.de",
"nextcloud.vm.uni-bremen.de"
],
"datadirectory": "REMOVED SENSITIVE VALUE",
"dbtype": "pgsql",
"version": "25.0.3.2",
"overwrite.cli.url": "https://nc.uni-bremen.de",
"dbname": "REMOVED SENSITIVE VALUE",
"dbhost": "REMOVED SENSITIVE VALUE",
"dbport": "",
"dbtableprefix": "oc_",
"mysql.utf8mb4": true,
"dbuser": "REMOVED SENSITIVE VALUE",
"dbpassword": "REMOVED SENSITIVE VALUE",
"installed": true,
"memcache.local": "\OC\Memcache\APCu",
"default_phone_region": "DE",
"filelocking.enabled": true,
"memcache.locking": "\OC\Memcache\Redis",
"memcache.distributed": "\OC\Memcache\Redis",
"redis": {
"host": "REMOVED SENSITIVE VALUE",
"port": 6379,
"timeout": 0,
"password": "REMOVED SENSITIVE VALUE"
},
"mail_smtpmode": "smtp",
"mail_smtpsecure": "tls",
"mail_sendmailmode": "smtp",
"mail_from_address": "REMOVED SENSITIVE VALUE",
"mail_domain": "REMOVED SENSITIVE VALUE",
"mail_smtphost": "REMOVED SENSITIVE VALUE",
"default_language": "de",
"default_locale": "de_DE",
"lookup_server": "",
"allow_user_to_change_display_name": false,
"enable_previews": true,
"maintenance": false,
"theme": "",
"loglevel": 1,
"trashbin_retention_obligation": "auto,30",
"bulkupload.enabled": false,
"app_install_overwrite": [
"issuetemplate"
]
}
}

Client configuration

Browser:

Firefox, Chrome, Chromium, ...

Operating system:

Ubuntu

主要言語
PHP
スター
106
フォーク
84
平均マージ
1日 11時間
マージ済み PR(30日)
14

環境構築

はじめの一歩

  1. issue を最後まで読み、次にプロジェクトのコントリビューションガイドを読みます。
  2. 着手することを issue にコメントします — 二人が同じ作業をするのを防げます。
  3. リポジトリをフォークし、ブランチを切って変更します。
  4. issue 番号を参照したプルリクエストを送ります。

nextcloud/user_saml のほかの issue

nextcloud/user_saml の issue をすべて見る

似ている issue

PHP の issue をもっと見る

新しい issue をメールで受け取る

初心者向けの GitHub issue を短くまとめたダイジェスト。