Github user sudheeshkatkam commented on a diff in the pull request:
https://github.com/apache/drill/pull/773#discussion_r110035581
--- 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 {
--- End diff --
Few things to note:
+ If encryption is enabled, PLAIN will fail negotiation anyway. So the
special handling (and this block itself) is unnecessary?
+ An implication of this is that even if the Drillbit starts up with PLAIN
configured correctly, the mechanism will not be offered to clients.
+ Consider a custom mechanism which do not support encryption, PLAIN will
not be offered, but that mechanism will be offered?
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