On Thu, Apr 16, 2020 at 09:41:23PM +0200, Harald Koch wrote:
> Am 16.04.2020 um 17:54 schrieb Tomas Mraz <tmraz@xxxxxxxxxx>:
> >
> > error queue of openSSL stays empty. The same code works with
> >> openSSL with gzip support („./config enable-zlib ...“, for support of
> >> compressed SMIME contents in other application).
> >> Do you call the OPENSSL_init_ssl from the main thread or from the
> >>> TLS
> >>> server thread?
> >> I call it from the TLS server thread (created by pthread_create):
> >>
> >> if (!OPENSSL_init_ssl(OPENSSL_INIT_LOAD_SSL_STRINGS, NULL))
> >> return;
> >> I tried to do it only once (instead of every started thread): no
> >> difference.
> > I do not see how this error could really happen unless
> > OPENSSL_cleanup() is called.
> >
> > Could you try to set a breakpoint on that function and see if it is
> > somehow called inadvertently?
> gdb is actually unavailable, so I added a big „printf“ at the beginning of crypto/init.c, recompiled (even without zlib support as I’ve seen there’s much functionality in there), function OPENSSL_cleanup: it’s not called. I’m very sure OPENSSL_cleanup is not called.
>
> > In addition, I load random data via /dev/urandom (also tested only
> >> once or every time the server thread starts):
> >> RAND_load_file("/dev/urandom", 256);
> > That call should not be necessary.
> I removed it just in case it may have an influence. No better result. :(
>
>
> I have a workaround and possibly it’s the solution, I would like to have your valuable statement here: you asked where I call OPENSSL_init_ssl: it’s done in the thread for TLS server. When I initialize it earlier in the main thread, the subsequent generated (second) thread works as expected! Is this spooky or expected behaviour?
Just to check: what OS is this on?
-Ben
