Something like SSL_CTX_set_alpn_select_cb for ciphers and ssl/tls protocol version

[Alexander Gryanko <xpahos@xxxxxxxxx>]

Hello, 

I'm looking for the way to do something like SSL_CTX_set_alpn_select_cb but for ciphers and ssl/tls protocol version. As I see ssl_choose_server_version and ssl3_choose_cipher has no any callbacks in tls_early_post_process_client_hello. Is there any way to disable protocols for some cases? Something like A/B testing with 50% of traffic with enabled Chacha20 and 50% of traffic with disabled.

Thank you.

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С уважением,
Александр Грянко