Program: 28236
Project: 28236
Buggy source:
private boolean validate(HttpRequest request,HttpResponse response,LoginConfig config,Authenticator authenticator,boolean calledFromAuthenticate) throws IOException {
  HttpServletRequest req=(HttpServletRequest)request.getRequest();
  HttpServletResponse res=(HttpServletResponse)response.getResponse();
  Subject subject=new Subject();
  MessageInfo messageInfo=new HttpMessageInfo(req,res);
  boolean rvalue=false;
  boolean isMandatory=true;
  try {
    WebSecurityManager webSecMgr=getWebSecurityManager(true);
    isMandatory=!webSecMgr.permitAll(req);
    if (isMandatory || calledFromAuthenticate) {
      messageInfo.getMap().put(HttpServletConstants.IS_MANDATORY,Boolean.TRUE.toString());
    }
    ServerAuthContext sAC=helper.getServerAuthContext(messageInfo,null);
    if (sAC != null) {
      AuthStatus authStatus=sAC.validateRequest(messageInfo,subject,null);
      rvalue=AuthStatus.SUCCESS.equals(authStatus);
      if (rvalue) {
        messageInfo.getMap().put(SERVER_AUTH_CONTEXT,sAC);
        req.setAttribute(MESSAGE_INFO,messageInfo);
      }
    }
 else {
      throw new AuthException("String_Node_Str");
    }
  }
 catch (  AuthException ae) {
    if (_logger.isLoggable(Level.FINE)) {
      _logger.log(Level.FINE,"String_Node_Str",ae);
    }
    res.setStatus(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
  }
  if (rvalue) {
    Set<Principal> principalSet=subject.getPrincipals();
    if (principalSet != null && !principalSet.isEmpty() && !principalSetContainsOnlyAnonymousPrincipal(principalSet)) {
      SecurityContext ctx=new SecurityContext(subject);
      Principal p=ctx.getCallerPrincipal();
      WebPrincipal wp=new WebPrincipal(p,ctx);
      try {
        String authType=(String)messageInfo.getMap().get(HttpServletConstants.AUTH_TYPE);
        if (authType == null && config != null && config.getAuthMethod() != null) {
          authType=config.getAuthMethod();
        }
        if (shouldRegister(messageInfo.getMap())) {
          AuthenticatorProxy proxy=new AuthenticatorProxy(authenticator,wp,authType);
          proxy.authenticate(request,response,config);
        }
 else {
          request.setAuthType((authType == null) ? PROXY_AUTH_TYPE : authType);
          request.setUserPrincipal(wp);
        }
      }
 catch (      LifecycleException le) {
        _logger.log(Level.SEVERE,"String_Node_Str",le);
      }
      HttpServletRequest newRequest=(HttpServletRequest)messageInfo.getRequestMessage();
      if (newRequest != req) {
        request.setNote(Globals.WRAPPED_REQUEST,new HttpRequestWrapper(request,newRequest));
      }
      HttpServletResponse newResponse=(HttpServletResponse)messageInfo.getResponseMessage();
      if (newResponse != res) {
        request.setNote(Globals.WRAPPED_RESPONSE,new HttpResponseWrapper(response,newResponse));
      }
    }
 else     if (isMandatory) {
      rvalue=false;
    }
  }
  return rvalue;
}

Fixed version (ground truth):
private boolean validate(HttpRequest request,HttpResponse response,LoginConfig config,Authenticator authenticator,boolean calledFromAuthenticate) throws IOException {
  HttpServletRequest req=(HttpServletRequest)request.getRequest();
  HttpServletResponse res=(HttpServletResponse)response.getResponse();
  Subject subject=new Subject();
  MessageInfo messageInfo=new HttpMessageInfo(req,res);
  boolean rvalue=false;
  boolean isMandatory=true;
  try {
    WebSecurityManager webSecMgr=getWebSecurityManager(true);
    isMandatory=!webSecMgr.permitAll(req);
    if (isMandatory || calledFromAuthenticate) {
      messageInfo.getMap().put(HttpServletConstants.IS_MANDATORY,Boolean.TRUE.toString());
    }
    ServerAuthContext sAC=helper.getServerAuthContext(messageInfo,null);
    if (sAC != null) {
      AuthStatus authStatus=sAC.validateRequest(messageInfo,subject,null);
      rvalue=AuthStatus.SUCCESS.equals(authStatus);
      if (rvalue) {
        messageInfo.getMap().put(SERVER_AUTH_CONTEXT,sAC);
        req.setAttribute(MESSAGE_INFO,messageInfo);
      }
    }
 else {
      throw new AuthException("String_Node_Str");
    }
  }
 catch (  AuthException ae) {
    if (_logger.isLoggable(Level.FINE)) {
      _logger.log(Level.FINE,"String_Node_Str",ae);
    }
    res.setStatus(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
  }
catch (  RuntimeException e) {
    if (_logger.isLoggable(Level.FINE)) {
      _logger.log(Level.FINE,"String_Node_Str",e);
    }
    res.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
  }
  if (rvalue) {
    Set<Principal> principalSet=subject.getPrincipals();
    if (principalSet != null && !principalSet.isEmpty() && !principalSetContainsOnlyAnonymousPrincipal(principalSet)) {
      SecurityContext ctx=new SecurityContext(subject);
      Principal p=ctx.getCallerPrincipal();
      WebPrincipal wp=new WebPrincipal(p,ctx);
      try {
        String authType=(String)messageInfo.getMap().get(HttpServletConstants.AUTH_TYPE);
        if (authType == null && config != null && config.getAuthMethod() != null) {
          authType=config.getAuthMethod();
        }
        if (shouldRegister(messageInfo.getMap())) {
          AuthenticatorProxy proxy=new AuthenticatorProxy(authenticator,wp,authType);
          proxy.authenticate(request,response,config);
        }
 else {
          request.setAuthType((authType == null) ? PROXY_AUTH_TYPE : authType);
          request.setUserPrincipal(wp);
        }
      }
 catch (      LifecycleException le) {
        _logger.log(Level.SEVERE,"String_Node_Str",le);
      }
    }
 else {
      if (((HttpServletRequest)messageInfo.getRequestMessage()).getUserPrincipal() != null) {
        request.setUserPrincipal(null);
        request.setAuthType(null);
      }
      if (isMandatory) {
        rvalue=false;
      }
    }
    if (rvalue) {
      HttpServletRequest newRequest=(HttpServletRequest)messageInfo.getRequestMessage();
      if (newRequest != req) {
        request.setNote(Globals.WRAPPED_REQUEST,new HttpRequestWrapper(request,newRequest));
      }
      HttpServletResponse newResponse=(HttpServletResponse)messageInfo.getResponseMessage();
      if (newResponse != res) {
        request.setNote(Globals.WRAPPED_RESPONSE,new HttpResponseWrapper(response,newResponse));
      }
    }
  }
  return rvalue;
}