Do these thread problems also occur when sharing the same SSL context but
not the same SSL object?
thanks,
-erik
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]]On Behalf Of Richard Levitte -
VMS Whacker
Sent: Tuesday, June 27, 2000 9:16 AM
To: [EMAIL PROTECTED]; [EMAIL PROTECTED]
Cc: [EMAIL PROTECTED]
Subject: Re: Does anyone know how to fix Multithreading??
From: Bill Rebey <[EMAIL PROTECTED]>
Bill.Rebey> I based my product on OpenSSL with the understanding that
Bill.Rebey> OpenSSL was multi-thread safe. It has since been brought
Bill.Rebey> to my attention that OpenSSL in fact NOT thread safe and
Bill.Rebey> can not read and write the same SSL from two different
Bill.Rebey> threads.
True, that aspect of OpenSSL is lacking...
Bill.Rebey> Does anyone know how I can fix the OpenSSL code so that
Bill.Rebey> this works? Does anyone even know what things in the SSL
Bill.Rebey> are thread-Unsafe so that I might know where to begin
Bill.Rebey> looking?
One quick if not easy way to deal with it is to make your own wrappers
around SSL_read() and SSL_write(), using SSL-specific locks. You can
associate the lock handles with the SSL structures through the ex_data
member.
Doing it directly in OpenSSL is bulky at best right now, and also
needs to be handled in a very general way, keeping in consideration
that on Windows, handles are a limited resource. I've some ideas on
how to go around that with an OpenSSL-specific lock implementation
(I've mentioned it before, I think).
--
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