> Well, I assume that the standard will become available in future.  

There was AES Counter Mode Cipher Suites for TLS and DTLS draft in 2006,
but it didn't make it to standard for 5 years. So I wouldn't count on
it. There is GCM standardized, and TLS support for it is present in
development [and 1.0.1] branch[es].

> As part of my research I want to make it to run in parallel, for cbc mode
> only the decryption can be run in parallel, but for ctr both encryption and
> decryption.

For research purposes it's not impossible to implement custom
multi-threaded counter subroutine to be used with
CRYPTO_gcm128_[en|de]crypt_ctr32. It's unlike that it would make it to
main stream, because OpenSSL is thread-agnostic, while multi-threading
an encryption mode is very thread-specific. Having results of experiment
might trigger reconsideration, but there are more variables in play than
sheer performance.
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