[openssl-users] Multithreading: Global locks causing bottleneck in parallel SSL_write calls

Benjamin Kaduk bkaduk at akamai.com
Wed Apr 12 16:31:50 UTC 2017

On 04/12/2017 05:54 AM, dipakgaigole wrote:
> Hi,
> I have a windows multi-threaded SSL server application which handles
> each client request in a new thread. The Server handles different
> types of requests. One of the request type is like “send file” where
> server thread has to read a file from local filesystem and send the
> content to the client.
> Server configurations:
>                 FIPS: Enabled
>                 SSL Protocol: TLSv1.2
>                 Cipher: AES256-SHA

The OpenSSL PRNG story is currently not so great, yes.
But maybe you should try without FIPS, and also with a different
cipher?  AES256-SHA is both CBC and SHA1, neither of which is really a
current best practice.

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