[Help-gnutls] Re: gnutls 1.2.6 and Mozilla Firefox compatibility problem

Nikos Mavrogiannopoulos nmav at gnutls.org
Sat Sep 10 11:12:42 CEST 2005

On Saturday 10 September 2005 10:34, Nikos Mavrogiannopoulos wrote:

> The problem is that in the 2nd forked session the server tries to resume
> the previous connection. You can check this by looking the session ID. The
> one the server selects the second time is the same as the client requested
> (resume). This is totally strange since there is no communication
> between the objects (lie in a different process), so the second process
> shoudn't even know the session ID of the first server process.
> It seems to work ok if you move the gnutls_session_t session declaration to
> after the forked process has been created (after if (pid==0)). I'm still
> looking at it but it really looks odd.

The problem seems to be libgcrypt's random generator. As far as I understand
when you fork() the random generator is on the same state for every children.
That's why the server produces the same session ID in the second process.

I am not really sure about it, and I don't know how to overcome this, that's 
why I crosspost to gcrypt-devel as well.

Nikos Mavrogiannopoulos

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