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https://issues.apache.org/jira/browse/PROTON-992?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Justin Ross reopened PROTON-992:
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Assignee: Andrew Stitcher (was: michael goulish)
Reopening this one because it holds most of the discussion.
> Proton's use of Cyrus SASL is not thread-safe.
> ----------------------------------------------
>
> Key: PROTON-992
> URL: https://issues.apache.org/jira/browse/PROTON-992
> Project: Qpid Proton
> Issue Type: Bug
> Components: proton-c
> Affects Versions: 0.10
> Reporter: michael goulish
> Assignee: Andrew Stitcher
> Priority: Critical
>
> Documentation for the Cyrus SASL library says that the library is believed to
> be thread-safe only if the code that uses it meets several requirements.
> The requirements are:
> * you supply mutex functions (see sasl_set_mutex())
> * you make no libsasl calls until sasl_client/server_init() completes
> * no libsasl calls are made after sasl_done() is begun
> * when using GSSAPI, you use a thread-safe GSS / Kerberos 5 library.
> It says explicitly that that sasl_set* calls are not thread safe, since they
> set global state.
> The proton library makes calls to sasl_set* functions in :
> pni_init_client()
> pni_init_server(), and
> pni_process_init()
> Since those are internal functions, there is no way for code that uses Proton
> to lock around those calls.
> I think proton needs a new API call to let applications call
> sasl_set_mutex(). Or something.
> We probably also need other protections to meet the other requirements
> specified in the Cyrus documentation (and quoted above).
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