Tsz-wo Sze created HDFS-17575:
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             Summary: SaslDataTransferClient should use SaslParticipant to 
create messages
                 Key: HDFS-17575
                 URL: https://issues.apache.org/jira/browse/HDFS-17575
             Project: Hadoop HDFS
          Issue Type: Improvement
          Components: security
            Reporter: Tsz-wo Sze
            Assignee: Tsz-wo Sze


Currently, a SaslDataTransferClient may send a message without using its 
SaslParticipant as below.  {code}
          sendSaslMessage(out, new byte[0]);
{code}
Instead, it should use its SaslParticipant to create the response.
{code}
      byte[] localResponse = sasl.evaluateChallengeOrResponse(remoteResponse);
      sendSaslMessage(out, localResponse);
{code}




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