isAnonymous() is now a bit weakened since it also considers
allowNullorEmptyUsername.
SaslExternalMechanism of smack-sasl-provided now also doesn't throw an
UnsupportedOperationException.
Follow up on 7e4e3699a1
to ConnectionConfiguration.Builder().
And prepare SASL EXTERNAL for empty or null usernames.
Also clarify some parts regarding the user field.
Fixes SMACK-627
Thanks to Stefan Karlsson for helping with the implementation.
Also add SASLMechanism.checkIfSuccessfulOrThrow(), to increase the
security by verifying the mechanisms state at the end of SASL
authentication.
SASLMechanism now has a SASLPrep StringTransformer.
Refactor SHA1 functions out of StringUtils into SHA1 utility class.
Add MAC utility class.
Make DummyConnection getSentpacket() methods use generics to make unit
testing SCRAM-SHA1 easier.
Fixes SMACK-398
Florian Schmaus
Daniele Ricci