Hi all: in https://issues.apache.org/jira/browse/HBASE-23347 introduce a puuggable rpc authentication
https://github.com/apache/hbase/pull/884 I want to use this pr to create a custom auth how to use or config the custom authentication ? I check the test code ,why we need setUp kerberos first? and seems server offer three simple/gss/ Digest and extras auth* if i add a extras but the client use simple the auth can be by pass now i just set three properties : hbase.client.sasl.provider.class hbase.client.sasl.provider.extras hbase.server.sasl.provider.extras what i missed? I check the code in ServerRpcConnection.java ```java //from me: if client pass the simple authbyte? we just use simple??? this.provider = this.saslProviders.selectProvider(authbyte); if (this.provider == null) { String msg = getFatalConnectionString(version, authbyte); doBadPreambleHandling(msg, new BadAuthException(msg)); return false; } //from me : don't understand here // TODO this is a wart while simple auth'n doesn't go through sasl. if (this.rpcServer.isSecurityEnabled && isSimpleAuthentication()) { if (this.rpcServer.allowFallbackToSimpleAuth) { this.rpcServer.metrics.authenticationFallback(); authenticatedWithFallback = true; } else { AccessDeniedException ae = new AccessDeniedException("Authentication is required"); doRespond(getErrorResponse(ae.getMessage(), ae)); return false; } } //from me : don't understand here ? if (!this.rpcServer.isSecurityEnabled && !isSimpleAuthentication()) { doRawSaslReply(SaslStatus.SUCCESS, new IntWritable(SaslUtil.SWITCH_TO_SIMPLE_AUTH), null, null); provider = saslProviders.getSimpleProvider(); // client has already sent the initial Sasl message and we // should ignore it. Both client and server should fall back // to simple auth from now on. skipInitialSaslHandshake = true; } useSasl = true; ```