On 23.10.19 15:21, Salz, Rich wrote: >> Is there a way for me to piggyback a void* inside the SSL structure so > that I can access it from within the callback? > > Yes, you can use SSL_set_app_data and SSL_get_app_data which are documented in https://github.com/openssl/openssl/pull/10216 (and due to be merged to master soon) Ah, completely overlooked that! Thanks, Rich, this scratches *exactly* my itch. All the best, Joe