53e9365c01
- Enable SSO with Azure AD credentials (tenant + client ID + redirect_uri) - Add JWTValidator.php: RS256 idToken validation via Azure JWKS with 1h cache - Add auth.php: POST login handler sets auth cookie, GET logout clears it - Add UserRoleManager.php: file-based role CRUD in data/user_roles.json - Add admin.php: admin-only role management panel - AuthMiddleware: add requireAdmin(), role in user array, fix MSAL redirect - header.php: hide Activity Logs + Admin Panel tabs for non-admin users - logs-viewer.php: protect with requireAdmin() instead of requireAuth() - server-setup.sh: add composer check, data/ dir, PHP extension checks, SSO validation - .gitignore: add data/ directory Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
116 lines
3.4 KiB
PHP
116 lines
3.4 KiB
PHP
<?php
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/**
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* JWT Validator for Azure AD v2 tokens (RS256)
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* Validates idTokens issued by Microsoft identity platform
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*/
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use Firebase\JWT\JWT;
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use Firebase\JWT\JWK;
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class JWTValidator {
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private string $tenantId;
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private string $clientId;
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private string $cacheFile;
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public function __construct(string $tenantId, string $clientId) {
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$this->tenantId = $tenantId;
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$this->clientId = $clientId;
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$this->cacheFile = __DIR__ . '/data/jwks_cache.json';
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}
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/**
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* Validate an Azure AD idToken
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* @return array ['valid' => bool, 'claims' => array] or ['valid' => false, 'error' => string]
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*/
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public function validate(string $token): array {
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try {
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$keys = $this->getPublicKeys();
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if (empty($keys)) {
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return ['valid' => false, 'error' => 'Failed to load public keys'];
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}
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$decoded = JWT::decode($token, JWK::parseKeySet($keys));
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$claims = (array) $decoded;
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// Validate issuer (v2 endpoint)
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$expectedIss = "https://login.microsoftonline.com/{$this->tenantId}/v2.0";
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if (($claims['iss'] ?? '') !== $expectedIss) {
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return ['valid' => false, 'error' => 'Invalid token issuer'];
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}
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// Validate audience
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if (($claims['aud'] ?? '') !== $this->clientId) {
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return ['valid' => false, 'error' => 'Invalid token audience'];
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}
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// Validate expiry (JWT::decode already checks this, but being explicit)
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if (($claims['exp'] ?? 0) < time()) {
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return ['valid' => false, 'error' => 'Token has expired'];
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}
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return ['valid' => true, 'claims' => $claims];
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} catch (Exception $e) {
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return ['valid' => false, 'error' => 'Token validation failed: ' . $e->getMessage()];
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}
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}
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/**
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* Fetch JWKS keys from Azure AD with 1-hour file cache
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*/
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private function getPublicKeys(): array {
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// Check cache
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if (file_exists($this->cacheFile)) {
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$cached = json_decode(file_get_contents($this->cacheFile), true);
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if ($cached && isset($cached['expires']) && $cached['expires'] > time()) {
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return $cached['keys'];
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}
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}
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// Fetch OIDC metadata
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$metadataUrl = "https://login.microsoftonline.com/{$this->tenantId}/v2.0/.well-known/openid-configuration";
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$metadata = $this->httpGet($metadataUrl);
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if (!$metadata || !isset($metadata['jwks_uri'])) {
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return [];
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}
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// Fetch JWKS
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$jwks = $this->httpGet($metadata['jwks_uri']);
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if (!$jwks || !isset($jwks['keys'])) {
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return [];
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}
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// Cache for 1 hour
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$cacheDir = dirname($this->cacheFile);
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if (!is_dir($cacheDir)) {
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mkdir($cacheDir, 0755, true);
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}
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file_put_contents($this->cacheFile, json_encode([
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'expires' => time() + 3600,
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'keys' => $jwks
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]));
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return $jwks;
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}
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private function httpGet(string $url): ?array {
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$ctx = stream_context_create([
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'http' => [
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'timeout' => 10,
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'user_agent' => 'PHP/JWTValidator'
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]
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]);
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$response = @file_get_contents($url, false, $ctx);
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if ($response === false) {
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return null;
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}
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return json_decode($response, true);
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}
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}
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