From patchwork Wed Feb 15 19:23:07 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Chuck Lever III X-Patchwork-Id: 13142080 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id AB21BC636D4 for ; Wed, 15 Feb 2023 19:23:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229692AbjBOTXO (ORCPT ); Wed, 15 Feb 2023 14:23:14 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59870 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229646AbjBOTXN (ORCPT ); Wed, 15 Feb 2023 14:23:13 -0500 Received: from ams.source.kernel.org (ams.source.kernel.org [145.40.68.75]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0A9A43B666 for ; Wed, 15 Feb 2023 11:23:12 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id A5353B81E4E for ; Wed, 15 Feb 2023 19:23:10 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id B1B86C4339B; Wed, 15 Feb 2023 19:23:08 +0000 (UTC) Subject: [PATCH v4 0/2] Another crack at a handshake upcall mechanism From: Chuck Lever To: kuba@kernel.org, pabeni@redhat.com, edumazet@google.com Cc: netdev@vger.kernel.org, chuck.lever@oracle.com, hare@suse.com, dhowells@redhat.com, bcodding@redhat.com, kolga@netapp.com, jmeneghi@redhat.com Date: Wed, 15 Feb 2023 14:23:07 -0500 Message-ID: <167648817566.5586.11847329328944648217.stgit@91.116.238.104.host.secureserver.net> User-Agent: StGit/1.5 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Hi- Here is v4 of a series to add generic support for transport layer security handshake on behalf of kernel socket consumers (user space consumers use a security library directly, of course). A summary of the purpose of these patches is archived here: https://lore.kernel.org/netdev/1DE06BB1-6BA9-4DB4-B2AA-07DE532963D6@oracle.com/ This version of the series replaces Classic Netlink infrastructure with Generic Netlink, as requested. It is again a signficant rewrite of the previous version of the series. There are several more tasks to complete, including the creation of a YAML protocol specification and the ability to return multiple remote peer identities upon handshake completion. The full patch set to support SunRPC with TLSv1.3 is available in the topic-rpc-with-tls-upcall branch here, based on v6.1.12: https://git.kernel.org/pub/scm/linux/kernel/git/cel/linux.git A sample user space handshake agent with netlink support is available in the "netlink" branch here: https://github.com/oracle/ktls-utils --- Changes since v3: - Converted all netlink code to use Generic Netlink - Reworked handshake request lifetime logic throughout - Global pending list is now per-net - On completion, return the remote's identity to the consumer Changes since v2: - PF_HANDSHAKE replaced with NETLINK_HANDSHAKE - Replaced listen(2) / poll(2) with a multicast notification service - Replaced accept(2) with a netlink operation that can return an open fd and handshake parameters - Replaced close(2) with a netlink operation that can take arguments Changes since RFC: - Generic upcall support split away from kTLS - Added support for TLS ServerHello - Documentation has been temporarily removed while API churns Chuck Lever (2): net/handshake: Create a NETLINK service for handling handshake requests net/tls: Add kernel APIs for requesting a TLSv1.3 handshake Documentation/networking/index.rst | 1 + Documentation/networking/tls-handshake.rst | 146 ++++++++ include/net/handshake.h | 46 +++ include/net/net_namespace.h | 5 + include/net/sock.h | 1 + include/net/tls.h | 23 ++ include/uapi/linux/handshake.h | 100 ++++++ net/Makefile | 1 + net/handshake/Makefile | 11 + net/handshake/handshake.h | 43 +++ net/handshake/netlink.c | 373 ++++++++++++++++++++ net/handshake/request.c | 160 +++++++++ net/tls/Makefile | 2 +- net/tls/tls_handshake.c | 388 +++++++++++++++++++++ 14 files changed, 1299 insertions(+), 1 deletion(-) create mode 100644 Documentation/networking/tls-handshake.rst create mode 100644 include/net/handshake.h create mode 100644 include/uapi/linux/handshake.h create mode 100644 net/handshake/Makefile create mode 100644 net/handshake/handshake.h create mode 100644 net/handshake/netlink.c create mode 100644 net/handshake/request.c create mode 100644 net/tls/tls_handshake.c -- Chuck Lever