Github user sudheeshkatkam commented on a diff in the pull request: https://github.com/apache/drill/pull/773#discussion_r110035650 --- Diff: exec/java-exec/src/main/java/org/apache/drill/exec/rpc/user/UserServer.java --- @@ -335,8 +350,27 @@ public BitToUserHandshake getHandshakeResponse(UserToBitHandshake inbound) throw } } - // mention server's authentication capabilities - respBuilder.addAllAuthenticationMechanisms(config.getAuthProvider().getAllFactoryNames()); + // We are checking in UserConnectionConfig that if SASL encryption is enabled then mechanisms other + // than PLAIN are also configured otherwise throw exception + final Set<String> configuredMech = config.getAuthProvider().getAllFactoryNames(); + + if (!config.isEncryptionEnabled()) { + + respBuilder.addAllAuthenticationMechanisms(configuredMech); + } else { + final Set<String> saslEncryptMech = new HashSet<>(); + + for (String mechanism : configuredMech) { + if (!mechanism.equals(PlainFactory.SIMPLE_NAME.toLowerCase())) { + saslEncryptMech.add(mechanism); + } + } + respBuilder.addAllAuthenticationMechanisms(saslEncryptMech); + } + + // set the encrypted flag in handshake message. For older clients this field is optional so will be ignored + respBuilder.setEncrypted(connection.isEncrypted()); --- End diff -- Shouldn't these be set inside the above `else` block? The values are invalid otherwise.
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