Apache 2.4 in a jail with Digest auth

[olli hauer]

On 2013-03-29 21:36, Spil Oss wrote:
> Hi,
> 
> I'm trying to upgrade my apache configurarion to 2.4 and ran into
> trouble that I haven't solved yet.
> 
> [Fri Mar 29 20:53:26.867199 2013] [auth_digest:notice] [pid 88563:tid
> 679494400] AH01757: generating secret for digest authentication ...
> [Fri Mar 29 20:53:26.867531 2013] [auth_digest:error] [pid 88563:tid
> 679494400] (78)Function not implemented: AH01762: Failed to create
> shared memory segment on file /var/run/authdigest_shm.88563
> [Fri Mar 29 20:53:26.867556 2013] [auth_digest:error] [pid 88563:tid
> 679494400] (78)Function not implemented: AH01760: failed to initialize
> shm - all nonce-count checking, one-time nonces, and MD5-sess
> algorithm disabled
> [Fri Mar 29 20:53:26.867571 2013] [:emerg] [pid 88563:tid 679494400]
> AH00020: Configuration Failed, exiting
> 
> Since setting sysvipc.allow = 1 makes the usage of a jail superfluous
> "If it were set to 1, it would defeat the whole purpose of having a
> jail;" [http://www.freebsd.org/doc/en/books/arch-handbook/jail-restrictions.html]
> 
> I was searching for a way to get it to use any of the other available
> methods but haven't found any.
> 1. Documentation to change the socache provider I haven't found after
> ploughing through the docs from httpd.apache.org
> 2. Disable shm in apr -> no switch for shm found in configure
> 
> Anyone have any bright ideas how to get Apache 2.4 to get to use a
> different store for the nonce?
> 
> (This is basically a duplicate of
> http://lists.freebsd.org/pipermail/freebsd-ports/2013-February/081052.html
> item 6 but now for the official port.
> 
> Kind regards,
> 
> Spil.

Hm, yes in apr/apu is no switch to disable shm but it shoud be possible
to disable this in apache24.

In modules/aaa/mod_auth_digest.c there is the following construct which
can be interesting.

 #if APR_HAS_SHARED_MEMORY
 static int initialize_tables(server_rec *s, apr_pool_t *ctx)
  ...

I haven't investigated what will happen if SHM will be disabled.

Perhaps try the following parameter
 AuthDigestShmemSize = 0


--
Regards,
 olli