pub unsafe extern "C" fn SSL_CTX_set_tlsext_ticket_key_cb(
ctx: *mut SSL_CTX,
callback: Option<unsafe extern "C" fn(ssl: *mut SSL, key_name: *mut u8, iv: *mut u8, ctx: *mut EVP_CIPHER_CTX, hmac_ctx: *mut HMAC_CTX, encrypt: c_int) -> c_int>,
) -> c_int