beyondyinjl2 commented on pull request #12331:
URL: https://github.com/apache/pulsar/pull/12331#issuecomment-940895526


   > Is it necessary? Currently KoP has implemented the authorization by 
leveraging Pulsar broker's authorization but doesn't require the access 
permission for this field.
   
   There is authentication when the mqtt protocol is connected, but the 
permission control of publishing and subscribing to topics is not implemented, 
and any user has the permission to publish and subscribe to topics
   
   When mop is connected for authentication, it uses: 
io.streamnative.pulsar.handlers.mqtt.utils.AuthUtils class 
configureAuthProviders() method, where AuthenticationService authService uses 
final AuthenticationProvider authProvider = 
authService.getAuthenticationProvider(authMethod);
   At present, mop does not have the authority to publish and subscribe to 
topics. I want to refer to the authentication method to implement the authority 
control of publishing and subscribing to topics, AuthorizationService 
authzService to obtain final AuthorizationProvider authzProvider = 
authzService.getProvider();


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