BASIC authentication problem in tomcat8.0.33

[Venkata Reddy P]

Hi,

I have been using the "BASIC authentication" from the tomcat3.x onwards, 
unfortunately after migrating to tomcat8.0.33 it is broken.  Could you please 
help on this what is going wrong?

Step1)-------Realm customization--------
                The customized classes are:-
                a) CustomizedPrincipal implements Principal
                b) CustomizedRealmBase extends RealmBase   :- this is returning 
successful customizedPrincipal to base class and then it is failing with 
following error.
                                                                        HTTP 
Status 403 - Access to the requested resource has been denied
                                                                        type 
Status report
                                                                        message 
Access to the requested resource has been denied
                                                                        
description Access to the specified resource has been forbidden.
Step2)  I have removed the files 'tomcat-users.txt' and 'tomcat-users.xsd' from 
<catalina_home>\config
Spte3)-----Web.xml basic authentication configuration--------
    <security-constraint>
      <display-name>Security Constraint</display-name>
      <web-resource-collection>
         <web-resource-name>Restricted Area</web-resource-name>
         <url-pattern>/*</url-pattern>
      </web-resource-collection>
      <auth-constraint>
         <role-name>bauth </role-name>
      </auth-constraint>
    </security-constraint>

    <login-config>
      <auth-method>BASIC</auth-method>
      <realm-name>Basic authentication</realm-name>
    </login-config>

Thanks in advance.