Undocumented OpenSSL functions

[Nebi Musa]

I would be very grateful if someone will explain even a few of the following functions:   SSL_CTX_ctrl   SSL_CTX_get_app_data   SSL_CTX_get_cert_store   SSL_CTX_get_client_cert_cb   SSL_CTX_sess_accept   SSL_CTX_set_cert_verify_cb   SSL_CTX_set_client_CA_list   SSL_CTX_set_client_cert_cb   SSL_get_certificate   Thanks!!!!