Why DIGEST-MD5 or CRAM-MD5 authentication mechanism does not work in qpid broker?

Issue

We are failing to authenticate our application using DIGEST-MD5 authentication method. While PLAIN method works properly.

We tried that in more qpid clients (Java/JMS, C++, Python), everytime with the same result.

As both SASL methods use the same credentials stored in the same file (and differ in the authentication method only), we are curious why DIGEST-MD5 does not work.

The same problems we spotted when using CRAM-MD5 mechanism that does not work either.