Method set_psk_client_callback

crates/stdlib/src/openssl.rs:1398–1429

(
            &self,
            callback: PyObjectRef,
            vm: &VirtualMachine,
        )

        #[pymethod]
        fn set_psk_client_callback(
            &self,
            callback: PyObjectRef,
            vm: &VirtualMachine,
        ) -> PyResult<()> {
            // Cannot add PSK client callback to a server context
            if self.protocol == SslVersion::TlsServer {
                return Err(vm
                    .new_os_subtype_error(
                        PySSLError::class(&vm.ctx).to_owned(),
                        None,
                        "Cannot add PSK client callback to a PROTOCOL_TLS_SERVER context"
                            .to_owned(),
                    )
                    .upcast());
            }

            if vm.is_none(&callback) {
                *self.psk_client_callback.lock() = None;
                unsafe {
                    sys::SSL_CTX_set_psk_client_callback(self.builder().as_ptr(), None);
                }
            } else {
                if !callback.is_callable() {
                    return Err(vm.new_type_error("callback must be callable"));
                }
                *self.psk_client_callback.lock() = Some(callback);
                // Note: The actual callback will be invoked via SSL app_data mechanism
                // when do_handshake is called
            }
            Ok(())
        }

        #[pymethod]
        fn set_psk_server_callback(