Cedric Abonnel
77 lines
2.5 KiB
PHP
77 lines
2.5 KiB
PHP
<?php
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declare(strict_types=1);
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if (session_status() !== PHP_SESSION_ACTIVE) {
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session_start();
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}
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require_once dirname(__DIR__, 2) . '/vendor/autoload.php';
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require_once dirname(__DIR__, 2) . '/bootstrap.php';
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require_once dirname(__DIR__, 2) . '/config/config.php';
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if (!function_exists('env')) {
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function env(string $key, ?string $default = null): ?string
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{
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if (array_key_exists($key, $_ENV) && $_ENV[$key] !== '') {
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return (string)$_ENV[$key];
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}
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$v = getenv($key);
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if ($v !== false && $v !== '') {
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return (string)$v;
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}
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return $default;
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}
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}
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$flow = $_GET['flow'] ?? 'login'; // 'login' ou 'register'
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if (!in_array($flow, ['login','register'], true)) {
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$flow = 'login';
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}
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// return_to (URL relative uniquement)
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$defaultReturn = '/';
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$rawReturn = $_GET['return_to'] ?? ($_SERVER['HTTP_REFERER'] ?? $defaultReturn);
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$returnTo = (is_string($rawReturn) && str_starts_with($rawReturn, '/')) ? $rawReturn : $defaultReturn;
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// Mémorise flow + cible
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$_SESSION['oidc_flow'] = $flow;
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$_SESSION['oidc_return_to'] = $returnTo;
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// --- OIDC conf ---
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$issuer = rtrim((string)env('OIDC_ISSUER', ''), '/');
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$clientId = (string)env('OIDC_CLIENT_ID', '');
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$redirectUri = (string)(env('OIDC_REDIRECT_URI') ?: url('oidc/callback'));
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if (!$issuer || !$clientId || !$redirectUri) {
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http_response_code(500);
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echo 'OIDC non configuré (OIDC_ISSUER / OIDC_CLIENT_ID / OIDC_REDIRECT_URI).';
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exit;
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}
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// --- Endpoints & PKCE ---
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$authEndpoint = $issuer . '/protocol/openid-connect/auth';
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$state = bin2hex(random_bytes(16));
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$nonce = bin2hex(random_bytes(16));
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$codeVerifier = rtrim(strtr(base64_encode(random_bytes(32)), '+/', '-_'), '=');
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$codeChallenge = rtrim(strtr(base64_encode(hash('sha256', $codeVerifier, true)), '+/', '-_'), '=');
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$_SESSION['oidc_state'] = $state;
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$_SESSION['oidc_nonce'] = $nonce;
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$_SESSION['oidc_code_verifier'] = $codeVerifier;
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// --- URL d’auth ---
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$params = [
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'response_type' => 'code',
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'client_id' => $clientId,
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'redirect_uri' => $redirectUri,
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'scope' => 'openid email profile',
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'state' => $state,
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'nonce' => $nonce,
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'code_challenge' => $codeChallenge,
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'code_challenge_method' => 'S256',
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'ui_locales' => 'fr',
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];
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header('Location: ' . $authEndpoint . '?' . http_build_query($params, '', '&', PHP_QUERY_RFC3986), true, 302);
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exit;
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