为啥使用sdk里面的方法都说签名错误

$ossClient = Common::getOssClient();
        $bucketList = null;
        try{
            $bucketListInfo = $ossClient->listBuckets();
        } catch(OssException $e) {
            printf(__FUNCTION__ . ": FAILED\n");
            printf($e->getMessage() . "\n");
            return;
        }
photosAction: FAILED SignatureDoesNotMatch: The request signature we calculated does not match the signature you provided. Check your key and signing method. RequestId: 568B9220F86BA43051E05D51