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[RFC] Integrating Cyrus SASL into Subversion

From: Vlad Georgescu <vgeorgescu_at_gmail.com>
Date: 2006-06-04 22:58:29 CEST

Properly implementing SASL support in Subversion will require some refactoring:

* On the client side:
Authentication is performed by the following functions in
subversion/libsvn_ra_svn/client.c : find_mech, auth_response,
read_success, do_auth. (There's also handle_auth_request, but it only
checks to see if the mechansm list is non-empty and then calls
do_auth).

Basically I want to extract these functions from client.c and put them
in another file (say, "old_auth.c"). The entry point for
authentication would be do_auth. I would then create a new file
"sasl_auth.c" that also exports do_auth but does authentication
through Cyrus SASL.

The idea is to conditionally compile and link only one of those files
depending on whether or not SASL is present on the system.

* On the server side:
The relevant file here is subversion/svnserve/serve.c. We still want
to put the old auth functions in another file, and create a new file
for SASL. However, since we want to default to NOT using Cyrus SASL
(because it's more difficult to configure) we will use both files. To
enable SASL, we should use an option in svnserve.conf (something like
"auth-type = sasl")

There's also the question of what to do with libsvn_ra_svn/cram.c.
This file contains the CRAM-MD5 authentication functions that should
probably go in the "old_auth.c" files, but also some utility functions
such as hex_decode and hex_encode that I still need to use in my
implementation.

Comments, anyone?

Thanks,
Vlad

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Received on Sun Jun 4 22:58:51 2006

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