friendica-addons/keycloakpassword/keycloakpassword.php

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<?php
/**
* Name: Keycloak Password Auth
* Description: Allow password-based authentication via the user's Keycloak credentials.
* Version: 1.0
* Author: Ryan <https://verya.pe/profile/ryan>
*/
use Friendica\App;
use Friendica\Core\Hook;
use Friendica\Core\Logger;
use Friendica\Core\Renderer;
use Friendica\Database\DBA;
use Friendica\DI;
use Friendica\Model\User;
function keycloakpassword_install()
{
Hook::register('authenticate', __FILE__, 'keycloakpassword_authenticate');
}
function keycloakpassword_request($client_id, $secret, $url, $params = [])
{
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS, http_build_query([
'client_id' => $client_id,
'grant_type' => 'password',
'client_secret' => $secret,
'scope' => 'openid',
] + $params));
$headers = array();
$headers[] = 'Content-Type: application/x-www-form-urlencoded';
curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
$res = curl_exec($ch);
if (curl_errno($ch)) {
Logger::error(curl_error($ch));
}
curl_close($ch);
return $res;
}
function keycloakpassword_authenticate($a, &$b)
{
if (empty($b['password'])) {
return;
}
$client_id = DI::config()->get('keycloakpassword', 'client_id', null);
$endpoint = DI::config()->get('keycloakpassword', 'endpoint', null);
$secret = DI::config()->get('keycloakpassword', 'secret', null);
if (!$client_id || !$endpoint || !$secret) {
return;
}
$condition = [
'nickname' => $b['username'],
'blocked' => false,
'account_expired' => false,
'account_removed' => false
];
try {
$user = DBA::selectFirst('user', ['uid'], $condition);
} catch (Exception $e) {
return;
}
$json = keycloakpassword_request(
$client_id,
$secret,
$endpoint . '/token',
[
'username' => $b['username'],
'password' => $b['password']
]
);
$res = json_decode($json, true);
if (array_key_exists('access_token', $res) && !array_key_exists('error', $res)) {
$b['user_record'] = User::getById($user['uid']);
$b['authenticated'] = 1;
// Invalidate the Keycloak session we just created, as we have no use for it.
keycloakpassword_request(
$client_id,
$secret,
$endpoint . '/logout',
[ 'refresh_token' => res['refresh_token'] ]
);
}
}
function keycloakpassword_admin_input($key, $label, $description)
{
return [
'$' . $key => [
$key,
$label,
DI::config()->get('keycloakpassword', $key),
$description,
true, // all the fields are required
]
];
}
function keycloakpassword_addon_admin(&$a, &$o)
{
$form =
keycloakpassword_admin_input(
'client_id',
DI::l10n()->t('Client ID'),
DI::l10n()->t('The name of the OpenID Connect client you created for this addon in Keycloak.'),
) +
keycloakpassword_admin_input(
'secret',
DI::l10n()->t('Client secret'),
DI::l10n()->t('The secret assigned to the OpenID Connect client you created for this addon in Keycloak.'),
) +
keycloakpassword_admin_input(
'endpoint',
DI::l10n()->t('OpenID Connect endpoint'),
DI::l10n()->t(
'URL to the Keycloak endpoint for your client. '
. '(E.g., https://example.com/auth/realms/some-realm/protocol/openid-connect)'
),
) +
[
'$msg' => DI::session()->get('keycloakpassword-msg', false),
'$submit' => DI::l10n()->t('Save Settings'),
];
$t = Renderer::getMarkupTemplate('admin.tpl', 'addon/keycloakpassword/');
$o = Renderer::replaceMacros($t, $form);
}
function keycloakpassword_addon_admin_post(&$a)
{
if (!local_user()) {
return;
}
$set = function ($key) {
$val = (!empty($_POST[$key]) ? trim($_POST[$key]) : '');
DI::config()->set('keycloakpassword', $key, $val);
};
$set('client_id');
$set('secret');
$set('endpoint');
}