causal/oidc

This extension uses OpenID Connect to authenticate users.

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Type:typo3-cms-extension

1.0.0 2020-08-21 14:59 UTC

This package is auto-updated.

Last update: 2021-04-12 10:35:20 UTC


README

This extension lets you authenticate Frontend users against an OpenID Connect server. It is preconfigured to work with the WSO2 Identity Server from the Swiss Alpine Club but may be used with your own identity server as well.

If you are a Swiss Alpine Club section, be sure to get in touch with Bern in order to get your dedicated private key and secret.

Default FE Loginbox

This extension integrates with the system extension 'felogin' and provides a new marker ###OPENID_CONNECT### to be used in the felogin template. A sample template is included. The marker will be replaced by a login link, pointing to the authorization endpoint of the authorization server.

OIDC Login

If openid_connect is your only means of frontend login, you can use the included "OIDC Login" plugin. Add it to your login page, where you would normally add the felogin box. After adding the OIDC Login plugin, requests to the login page will immediately be redirected to the authorization server.

After the login process, the user will be redirected:

  • The OIDC Login supports the same redirect_url parameter as the felogin box
  • If no parameter is set, OIDC Login will redirect the user to the page configured at plugin.tx_oidc_login.defaultRedirectPid.
  • If that configuration is not set either, the user will be redirected to '/'.

PKCE (Proof of Key for Code Exchange)

If your OIDC Login supports Proof of Key for Code Exchange you can enable it by checking enableCodeVerifier in the extension configuration. A shared secret will be sent along preventing Authorization Code Interception Attacks. See https://tools.ietf.org/html/rfc7636 for details.

Configuring

Mapping Frontend User Fields

  • Configuration is done through TypoScript within plugin.tx_oidc.mapping.fe_users

  • OIDC attributes will be recognized by the specific characters <>:

    email = <mail>
    
  • You may combine multiple markers as well, e.g.,

    name = <family_name>, <given_name>
    
  • Support for stdWrap in field definition, e.g.,

    name = <name>
    name.wrap = |-OIDC
    
  • Support for TypoScript "split" (//). This will check multiple field names and return the first one yielding some non-empty value. E.g.,

    username = <sub> // <contact_number> // <emailaddress> // <benutzername>
    

Mapping Frontend User Groups

  • Create your groups within TYPO3
  • Use the additional pattern to relate it to roles within OpenID Connect
  • Local TYPO3 groups (not related to some role) will be kept upon authenticating
  • Default TYPO3 group(s) as configured in Extension Manager will always be added

OIDC Login

  • plugin.tx_oidc_login.defaultRedirectPid UID of the page that users will be redirected to, if no redirect_url parameter is set.

Logging

This extension makes use of the Logging system introduced in TYPO3 CMS 6.0. It is far more flexible than the old one writing to the "sys_log" table. Technical details may be found in the TYPO3 Core API.

As an administrator, what you should know is that the TYPO3 Logger forwards log records to "Writers", which persist the log record.

By default, with a vanilla TYPO3 installation, messages are written to the default log file (typo3temp/logs/typo3_*.log).

Dedicated Log File for OpenID Connect

If you want to redirect every logging information from this extension to typo3temp/logs/oidc.log and send log entries with level "WARNING" or above to the system log, you may add following configuration to typo3conf/AdditionalConfiguration.php:

$GLOBALS['TYPO3_CONF_VARS']['LOG']['Causal']['Oidc']['writerConfiguration'] = [
    \TYPO3\CMS\Core\Log\LogLevel::DEBUG => [
        \TYPO3\CMS\Core\Log\Writer\FileWriter::class => [
            'logFile' => 'typo3temp/logs/oidc.log'
        ],
    ],

    // Configuration for WARNING severity, including all
    // levels with higher severity (ERROR, CRITICAL, EMERGENCY)
    \TYPO3\CMS\Core\Log\LogLevel::WARNING => [
        \TYPO3\CMS\Core\Log\Writer\SyslogWriter::class => [],
    ],
];

Hint: Be sure to read Configuration of the Logging system to fine-tune your configuration on any production website.