Files
preauth/src/Service/BackupCodeManager.php
T
lyra 2064153cd3
Tests / test (pull_request) Successful in 1m10s
chore: adopt shared Guiding Light configs and fix conformance gaps
Brings preauth from 18/34 to 30/34 conformance (auth-gateway profile). The
remaining four checks all depend on files this branch cannot change (see below).

PHP toolchain (§1)
  - require.php  >=8.4 -> ^8.5, and pin config.platform to 8.5.0. The old
    constraint also permitted PHP 9, which is not a promise we can keep.
    composer.lock regenerated with --lock: content-hash + platform-overrides
    only, zero dependency version movement.
  - friendsofphp/php-cs-fixer  * -> ^3.95. A wildcard meant CI was not
    reproducible.

PHPStan (§2.2)
  - vendor the shared phpstan.neon.dist (level 6) + a generated baseline.
    187 errors are captured rather than fixed; the baseline should only shrink
    from here.
  - add phpstan/phpstan:^2.1 to require-dev.

Code style (§8.2)
  - vendor the shared .php-cs-fixer.dist.php (@Symfony + @Symfony:risky +
    declare_strict_types) and apply it: 59 of 67 files reformatted.
  - Verified this is a formatting change, not a behaviour change: all 313 tests
    pass after the reformat, all in_array() calls already passed strict=true,
    and the remaining edits are @Symfony:risky idiom (yoda conditions, \count(),
    self:: over the class name).

Repository layout (§4.4)
  - docs/{Caddyfile,compose.yaml,example.env} -> docs/examples/, with
    example.env becoming the conventional .env.example. This is the layout
    GUIDING-LIGHT already cites preauth as doing correctly — it just needed
    renaming.
  - update the four readme.md references and a stale compose.yaml comment.
  - docs/v1.1-plan.md references are left alone deliberately: it is a historical
    plan recording what was done at the time, not live documentation.

Licence and security policy (§7)
  - add LICENSE (uniform MIT, matching composer.json).
  - add SECURITY.md describing the actual threat model: per-request
    allow/intercept, no caching of the login flow, app-set security headers,
    TOTP, and the fact that REMOTE_USER is trusted input.

Mobile accessibility (§3.3a)
  - templates/base.html.twig: drop maximum-scale=1 and add viewport-fit=cover.
    preauth was the one app already past the font-size precondition (controls
    render at 21.6px = 0.9em x 24px), so removing the lock is safe here and
    restores pinch-zoom for Android users.

Conformance tooling (§8.2)
  - vendor .ci/conformance.sh and .ci/css-control-size.py so the check runs
    from a checkout rather than fetching from the LAN-only private/ci.
  - .editorconfig synced from the version that keeps the Caddyfile tab rule.

Not included (blocked by the .gitea/workflows pre-receive hook):
  - ci-composer-audit, ci-composer-validate, ci-reusable-workflows.
    Workflow files may only change via a trusted ref, so the caller files are
    staged but not committed.

Also not included: dockerfile-nonroot (§6.4). Adding USER to an image with
VOLUME [/config, /data] changes volume ownership and needs an actual container
build/run to verify, so it goes in its own change.
2026-09-23 20:13:45 +00:00

121 lines
4.2 KiB
PHP
Raw Blame History

This file contains ambiguous Unicode characters
This file contains Unicode characters that might be confused with other characters. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.
<?php
declare(strict_types=1);
namespace App\Service;
use App\AppConstants;
use App\MonitorCacheKeys;
use App\Trait\GetTotpTrait;
use App\Trait\HasLoggerTrait;
use App\Trait\StringTrait;
use DateTimeImmutable;
use Exception;
use Psr\Cache\CacheItemPoolInterface;
use Psr\Cache\InvalidArgumentException;
/** backup-codes are case‑insensitive alphanumeric strings
* they are single-use and marked as used after successful authentication */
final readonly class BackupCodeManager implements BackupCodeInterface
{
use GetTotpTrait;
use HasLoggerTrait;
use StringTrait;
private const int DEFAULT_COUNT = 10;
/* php base_convert() will break if given too long of an input */
public const int MAX_LENGTH = 64;
private CacheItemPoolInterface $sessionCache;
/** @throws InvalidArgumentException */
public function __construct(CacheItemPoolInterface $sessionCache)
{
$this->sessionCache = new MonitorCacheKeys($sessionCache);
}
/** generate a set of backup-codes and return them.
* @param int $count Number of codes to generate
*
* @return string[] Generated backup codes
*
* @throws InvalidArgumentException|Exception */
public function generate(int $count = self::DEFAULT_COUNT): array
{
$length = min($this->getTotp()->getDigits() + 2, self::MAX_LENGTH);
$codes = [];
for ($i = 0; $i < $count; ++$i) {
/* output is alphanumeric string of given length */
$codes[] = strtolower(str_pad(substr(base_convert(bin2hex(
random_bytes($length),
), 16, 36), 0, $length), $length, '0', \STR_PAD_LEFT));
}
$this->saveCodes($codes);
$this->logger->info("generated {$count} backup codes");
return $codes;
}
/** @throws InvalidArgumentException */
public function expire(): void
{
$itemsToRemove = [];
foreach ($this->sessionCache->getKeys() as $key) {
if (str_starts_with($key, 'backup_')) {
$itemsToRemove[] = $key;
}
}
if (\count($itemsToRemove) > 0) {
$this->sessionCache->deleteItems($itemsToRemove);
}
}
/** check if backup-code is valid and mark it as used.
* @param string $code Code supplied by the client
*
* @return bool true if the code is valid and unused
*
* @throws InvalidArgumentException */
public function verifyAndConsume(string $code): bool
{
/* remove unallowed characters, since backup codes are case-insensitive alphanumeric */
$backupKey = 'backup_'.preg_replace('/[^a-z0-9]+/', '', strtolower($code));
$backupItem = $this->sessionCache->getItem($this->makeCacheKey($backupKey));
$this->logger->debug('checking backup code: '.($backupItem->isHit() ? 'HIT & ' : 'miss & ').($backupItem->get() ? 'VALID' : 'invalid'));
if ($backupItem->isHit() && $backupItem->get()) {
$this->logger->debug('valid backup code');
/* mark backup code as spent */
$backupItem->set(false); /* used */
/* per PSR6, if no expiration is set, implementation may set a default,
* we want this to keep forever, so a few hundred years should do it */
$backupItem->expiresAt(DateTimeImmutable::createFromFormat(
'Y-m-d',
AppConstants::FAR_FUTURE_DATE,
));
$this->sessionCache->save($backupItem);
return true;
}
return false;
}
/** @throws InvalidArgumentException */
private function saveCodes(array $codes): void
{
foreach ($codes as $code) {
$backupItem = $this->sessionCache->getItem($this->makeCacheKey(strtolower("backup_$code")));
/* mark backup code as ready */
$backupItem->set(true);
/* per PSR6, if no expiration is set, implementation may set a default,
* we want this to keep forever, so a few hundred years should do it */
$backupItem->expiresAt(DateTimeImmutable::createFromFormat(
'Y-m-d',
AppConstants::FAR_FUTURE_DATE,
));
$this->sessionCache->saveDeferred($backupItem);
}
$this->sessionCache->commit();
}
}