Re: [pyOpenSSL] Python core dumps when using pyOpenSSL 0.8.0 and threads

[M.-A. L. <ma...@eg...>]

On 2009-03-18 21:54, Jean-Paul Calderone wrote:
> On Wed, 18 Mar 2009 21:38:49 +0100, "M.-A. Lemburg" <ma...@eg...> wrote:
>> Do you have any information on whether the context in OpenSSL is
>> thread-safe ?
>>
>> The FAQ entry for OpenSSL only mentions connections:
>> http://www.openssl.org/support/faq.html#PROG1
>>
>> Note that it also mentions two callbacks that have to be initialized
>> for multi-threaded applications: CRYPTO_set_locking_callback() and
>> CRYPTO_set_id_callback() which pyOpenSSL does not set.
>>
>> Unfortunately, the man page explaining these is not very helpful:
>>
>> http://www.openssl.org/docs/crypto/threads.html
> 
> You've linked to all the documentation I'm aware of.  My interpretation
> of it has been that it means Context objects are threadsafe, as long as
> you initialize OpenSSL's threading layer (which pyOpenSSL does in 0.8.0
> but not in any previous version!). 

Ah sorry, I grepped the wrong pyOpenSSL version. Good to know that
0.8.0 does setup the OpenSSL threading support !

> Probably reading the implementation
> is the only way to be really sure (though, of course, a future release
> of OpenSSL might invalidate anything learned using that approach).

True. They do have a tendency to change internals frequently... even
in sub-patch-level releases.

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