Andrew Stitcher created PROTON-933:
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Summary: Cyrus SASL GSSAPI plugin can error if sent long buffers.
Key: PROTON-933
URL: https://issues.apache.org/jira/browse/PROTON-933
Project: Qpid Proton
Issue Type: Bug
Components: proton-c
Affects Versions: 0.10
Reporter: Andrew Stitcher
Assignee: Andrew Stitcher
Priority: Blocker
Cyrus SASL GSSAPI is not able to handle buffers in the advertised way -
Even if you limit the amount of data to decode on the server side to the
SASL_MAXOUTBUF value that it reports it can fail with a syslog of (for example):
{quote}
Jul 6 13:32:38 proton msgr-recv: encoded packet size too big (32828 > 32768)
{quote}
It appears that the decode routine can coalesce received buffers, and in fact
its actual requirement is that you may not _encode_ on the _client_ any more
than the value returned on the server. However the value of SASL_MAXOUTBUF that
is returned on the client is 60 bytes bigger than the value returned on the
server.
The workaround is to subract 60 bytes from the value on the returned on the
client before using it.
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