private function saveFile(string $filePath, callable $callback) : \Generator
{
if (!isset($this->dataCache[$filePath])) {
yield from $this->loadFile($filePath);
}
return (yield $this->lockMutexes[$filePath]->withLock(function () use($filePath, $callback) {
$data = $callback($this->dataCache[$filePath]);
if (!is_array($data)) {
throw new \LogicException('JSON data files may only contain arrays as the root element');
}
// make sure we can persist it before updating the store
(yield put($filePath, json_try_encode($data)));
return $this->dataCache[$filePath] = $data;
}));
}
private function doLoadKeyPair(string $path) : Generator
{
$privateExists = (yield exists("{$path}/private.pem"));
$publicExists = (yield exists("{$path}/public.pem"));
$lockExists = (yield exists("{$path}/key.lock"));
if ($privateExists && $publicExists) {
while ($lockExists) {
(yield new Pause(500));
$lockExists = (yield exists("{$path}/key.lock"));
}
return new KeyPair((yield get("{$path}/private.pem")), (yield get("{$path}/public.pem")));
}
$lock = new Lock("{$path}/key.lock");
try {
$lock->acquire();
$gen = new OpenSSLKeyGenerator();
$keyPair = $gen->generate(4096);
(yield put("{$path}/private.pem", $keyPair->getPrivate()));
(yield put("{$path}/public.pem", $keyPair->getPublic()));
return $keyPair;
} catch (Exception $e) {
do {
(yield new Pause(500));
$lockExists = (yield exists("{$path}/key.lock"));
} while ($lockExists);
return new KeyPair((yield get("{$path}/private.pem")), (yield get("{$path}/public.pem")));
} finally {
$lock->release();
unlink("{$path}/key.lock");
// do not yield in finally!
}
}
private function doProvideChallenge(string $dns, string $token, string $payload)
{
(yield put($this->configPath . "/challenges/{$dns}/.well-known/acme-challenge/{$token}", $payload));
}
