Re: Error when using libssh in a PAM module with OpenSSH

[Andreas Schneider <asn@xxxxxxxxxxxxxx>]

On Thursday 23 October 2014 18:21:13 perox@xxxxxxxxxx wrote:
> > Why do you link against two libraries which provide the same
> > functionality?
> 
> I don't. As described in my first message, I am using libssh from within a
> PAM module that happens to be also used for ssh authentication. There is no
> linking involved on my part and I suspect the libssh from openssh is being
> 'injected' by LD_PRELOAD or some other mechanism (when sshd is executed at
> the start of an ssh session) and I can't do anything about it. I realize
> this is an arcance use case.
> 
> Now, there is similar functionality in openssh's libssh but it is largely
> undocumented, the naming is obscure and I cannot even link to it properly
> so I had to resort to 'dlopen' etc. (Haven't tried for that long, though).
> Therefore I'd really like to use libssh but I have no idea how to achieve
> this short of shared object redirection via fiddling around with ELF
> internals.

It would work if you create a map file for symbol versioning and compile 
libssh with it. This should resolve the problem.


	-- andreas


-- 
Andreas Schneider                   GPG-ID: CC014E3D
www.cryptomilk.org                asn@xxxxxxxxxxxxxx