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190 changes: 189 additions & 1 deletion LICENSE
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Copyright 2020 Jasper Weyne
Apache License
Version 2.0, January 2004
http://www.apache.org/licenses/

TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION

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26 changes: 25 additions & 1 deletion README.md
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OpenIdConnect is a Piwigo plugin which enabled logins through OpenID Connect.
# Piwigo OpenID Connect plugin
OpenID Connect is a Piwigo plugin which allows single sign-on logins using the
OpenID Connect protocol. The protocol utilizes both the OpenID Connect Core and
the OpenID Connect Discovery specifications. The plugin supports both the
authorization code flow, as well as the (legacy) resource owner credentials
flow, otherwise known as the password flow. Although legacy and recommended
against, by enabling this flow, login through the Piwigo webservice API is
enabled.

Special thanks to jumbojett for the OpenID Connect library used in this plugin.

## License
This project is covered by the Apache 2.0 License, please refer to the LICENSE
file enclosed.

## Install
To install the plugin in a Piwigo installation, please download a release and
unzip it to the /plugins folder within your Piwigo installation. Enable the
plugin from Piwigo (it should be visible), and configure the plugin through the
admin. Test that your installation is functional before enabling a flow.

To install this repository, clone the repository or download its contents
manually. Note that at least, PHP 5.6 is required, and PHP 7.0 is recommended.
Also, Composer is required for downloading the dependencies, which can be done
by executing the shell command `composer install`.
52 changes: 38 additions & 14 deletions admin.php
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<?php
/*
Copyright 2020 Jasper Weyne
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/

defined('OIDC_PATH') or die('Hacking attempt!');

// Authorization flow forms
if (isset($_POST['authorization_create']))
{
$_SESSION[OIDC_SESSION . '_auth'] = 'create';
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redirect(OIDC_PATH . 'auth.php');
}

// Password flow forms
if (isset($_POST['password_test']) || isset($_POST['password_create']))
{
// Build a token request
$oidc = get_oidc_client();
$oidc->addAuthParam([
'username' => $_POST['password_test_user'],
'password' => $_POST['password_test_pass'],
]);

// Try to perform token request
try {
$response = $oidc->requestResourceOwnerToken(true);
if (!isset($response->access_token)) {
$page['errors'][] = $response->error . (isset($response->error_description) ? ': ' . $response->error_description : '');
}

$oidc->setAccessToken($response->access_token);
$sub = $oidc->requestUserInfo('sub');
if ($sub === null) {
$page['errors'][] = l10n('Server did not return user info');
}
} else {
// Token request succeeded, store token in $oidc
$oidc->setAccessToken($response->access_token);

if (isset($_POST['password_create'])) {
$user_id = oidc_retrieve($oidc, true);
if ($user_id !== null) {
$page['infos'][] = l10n('User added to Piwigo!');
// If userinfo point is inaccessible, show error
if (null === $oidc->requestUserInfo('sub')) {
$page['errors'][] = l10n('Server did not return user info');
} else if (isset($_POST['password_create'])) {
// User creation flow
$user_id = oidc_retrieve($oidc, true);
if ($user_id !== null) {
$page['infos'][] = l10n('User added to Piwigo!');
} else {
$page['errors'][] = l10n('A problem occurred during user registration.');
}
} else {
$page['errors'][] = l10n('A problem occurred during user registration.');
$page['infos'][] = l10n('Resource owner credentials flow successful!');
}
} else {
$page['infos'][] = l10n('Resource owner credentials flow successful!');
}
} catch (\Exception $e) {
// Catch all
$page['errors'][] = $e->getMessage();
}
}

// Save settings form
if (isset($_POST['save_config']))
{
$conf['OIDC'] = [
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$page['infos'][] = l10n('Settings saved.');
}

// General warnings
if (!$conf['allow_user_registration'] && $conf['OIDC']['register_new_users']) {
$page['warnings'][] = l10n('User registration is disabled in the Piwigo settings. This behaviour will be overridden by this plugin.');
}

// Render page
$template->assign($conf['OIDC']);
$template->assign(['redirect_url' => embellish_url(get_absolute_root_url() . OIDC_PATH . 'auth.php')]);

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15 changes: 15 additions & 0 deletions auth.php
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<?php
/*
Copyright 2020 Jasper Weyne
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/

define('PHPWG_ROOT_PATH', '../../');

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9 changes: 9 additions & 0 deletions composer.json
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{
"name": "jasperweyne/piwigo_oidc",
"description": "A Piwigo plugin for OpenID Connect authentication of users.",
"license": "apache-2.0",
"authors": [
{
"name": "Jasper Weyne",
"email": "[email protected]"
}
],
"require": {
"jumbojett/openid-connect-php": "^0.9.1"
}
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15 changes: 15 additions & 0 deletions conf.php
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<?php
/*
Copyright 2020 Jasper Weyne
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/

defined('OIDC_PATH') or die('Hacking attempt!');

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16 changes: 16 additions & 0 deletions index.php
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<?php
/*
Copyright 2020 Jasper Weyne
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/

$url = '../';
header( 'Request-URI: '.$url );
header( 'Content-Location: '.$url );
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