Jaewoong Choi 2012-11-21, 19:46
Flavio Junqueira 2012-11-22, 21:23
-Re: Authentication mechanism
Jaewoong Choi 2012-11-26, 05:07
I believe I've read it several times. I guess you refers to the following statement:
"... When a client connects to ZooKeeper and authenticates itself, ZooKeeper associates all the ids that correspond to a client with the clients connection. "
>From my understanding based on my real tests, client authenticates by calling ZooKeeper#setAuthInfo. In other words, authentication never happens if client bypass authentication #setAuthInfo. Could you please confirm and clarify? Haven't you been able to reproduce the scenario I described below?
On Nov 22, 2012, at 1:23 PM, Flavio Junqueira wrote:
> Hi Jaewoong,
> I'm not sure if you have had a chance to look at the documentation:
> My understanding is that a client authenticates when it connects.
> On Nov 21, 2012, at 8:46 PM, Jaewoong Choi wrote:
>> I got a question regarding ZooKeeper's authentication mechanism. Let me describe a scenario first.
>> 1. ZooKeeper server started up with a customized AuthenticationProvider (e.g. XyzAuthenticationProvider which authentication scheme is "xyz") enabled with -Dzookeeper.authProvider.1=class.path.to.XyzAuthenticationProvider option.
>> 2. But all znodes (including "/" and "/zookeeper") haven't been assigned any ACL of neither this "xyz" scheme or "auth" scheme s.t. they are open to the world by default.
>> 3. At this stage, any ZooKeeper client without any authInfo ( who hasn't invoked org.apache.zookeeper.ZooKeeper#setAuthInfo ) are permitted to do anything!! e.g. It can create znodes under "/" and etc.
>> This is what I verified with my test using zookeeper_server-3.4.3 and zookeeper-3.4.3 client library.
>> Here come some questions.
>> 1. Is the above scenario true?
>> 2. Isn't there any access control on "Connect" permission level regardless of znode-level ACLs? For example, can we deny client connection before its access to any znode when it comes without a valid authInfo?
Michi Mutsuzaki 2012-11-26, 19:11