Server.java 文件源码

private RpcSaslProto buildSaslNegotiateResponse()
    throws IOException, InterruptedException {
  RpcSaslProto negotiateMessage = negotiateResponse;
  // accelerate token negotiation by sending initial challenge
  // in the negotiation response
  if (enabledAuthMethods.contains(AuthMethod.TOKEN)) {
    saslServer = createSaslServer(AuthMethod.TOKEN);
    byte[] challenge = saslServer.evaluateResponse(new byte[0]);
    RpcSaslProto.Builder negotiateBuilder =
        RpcSaslProto.newBuilder(negotiateResponse);
    negotiateBuilder.getAuthsBuilder(0)  // TOKEN is always first
        .setChallenge(ByteString.copyFrom(challenge));
    negotiateMessage = negotiateBuilder.build();
  }
  sentNegotiate = true;
  return negotiateMessage;
}