使用PHP进行身份验证的Firebase REST访问

use FirebaseJWTJWT;
use GoogleAuthCredentialsServiceAccountCredentials;
use GoogleAuthHttpHandlerHttpHandlerFactory;
use GuzzleHttpClient;

$email = 'account@email.com';
$key = 'private_key_goes_here';

$scopes = [
    'https://www.googleapis.com/auth/userinfo.email','https://www.googleapis.com/auth/firebase.database',];

$creds = [
    'client_email' => $email,'private_key' => $key,];

$serviceAccount = new ServiceAccountCredentials($scopes,$creds);
$handler = HttpHandlerFactory::build(new Client());
$token = $serviceAccount->fetchAuthToken($handler);

$firebase = new FirebaseFirebaseLib($url,$token);
$value = $firebase->get('test/hello');
# $value now stores "world"

但是,这需要Firebase中的安全规则是通用读/写,这是我不想要的.如果我将安全规则更新为：

{
  "rules": {
    "test": {
      ".read": "auth != null"
    }
  }
}

$value的结果变为{“error”：“Permission denied”}.我进行了广泛的搜索,并尝试了许多排列和可能的解决方案,没有确定的结果.

我已经使用this code向最终客户端提供JWT令牌,这些客户端可以成功使用它们并且可以毫无问题地利用安全规则.我最初为服务器尝试了相同的方法,但没有成功.我选择尝试将两种方法结合起来：

# Snipping code that didn't change...
$serviceAccount = new ServiceAccountCredentials($scopes,$creds);
$handler = HttpHandlerFactory::build(new Client());

$payload = [
    'iss' => $email,'sub' => $email,'aud' => 'https://identitytoolkit.googleapis.com/google.identity.identitytoolkit.v1.IdentityToolkit','iat' => time(),'exp' => time() + 60 * 60,'uid' => '123','claims' => [
        'uid' => '123',],];

$payload = $serviceAccount->updateMetadata($payload);
$token = JWT::encode($payload,$key,'RS256');

$firebase = new FirebaseFirebaseLib($url,$token);
$value = $firebase->get('test/hello');

这似乎接近了,但$value现在包含{“error”：“在auth标题中缺少声明’孩子’.”}.为了解决这个问题,我修改了编码调用：

$token = JWT::encode($payload,'RS256','key_id_goes_here');

这导致了一个稍微不同的错误：在auth标题中无效声明’kid’,表明我在正确的轨道上…但不完全在那里.直接使用JWT令牌会产生完全相同的结果.我有什么想法我做错了吗？电子邮件,私钥和密钥ID都直接来自我创建服务帐户时提供的json凭证文件.

我查看了几十页的文档和帖子,以下是最有帮助的：

> Using JWT for Server Auth (Firebase Docs)
> Using Custom Tokens to make REST requests to FB DB as an admin
> Is it still possible to do server side verification of tokens in Firebase 3?

Cross发布到Firebase Google Group.