netdev - [PATCH net-next 0/2] sctp: Convert to use crypto lib, and upgrade cookie auth

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Message-ID: <20250811193741.412592-1-ebiggers@kernel.org>
Date: Mon, 11 Aug 2025 12:37:39 -0700
From: Eric Biggers <ebiggers@...nel.org>
To: linux-sctp@...r.kernel.org,
	netdev@...r.kernel.org,
	Xin Long <lucien.xin@...il.com>,
	Marcelo Ricardo Leitner <marcelo.leitner@...il.com>
Cc: linux-crypto@...r.kernel.org,
	Eric Biggers <ebiggers@...nel.org>
Subject: [PATCH net-next 0/2] sctp: Convert to use crypto lib, and upgrade cookie auth

This series converts SCTP chunk and cookie authentication to use the
crypto library API instead of crypto_shash.  This is much simpler (the
diffstat should speak for itself), and also faster too.  In addition,
this series upgrades the cookie authentication to use HMAC-SHA256.

I've tested that kernels with this series applied can continue to
communicate using SCTP with older ones, in either direction, using any
choice of None, HMAC-SHA1, or HMAC-SHA256 chunk authentication.

Eric Biggers (2):
  sctp: Use HMAC-SHA1 and HMAC-SHA256 library for chunk authentication
  sctp: Convert cookie authentication to use HMAC-SHA256

 Documentation/networking/ip-sysctl.rst |  11 +-
 include/net/netns/sctp.h               |   4 +-
 include/net/sctp/auth.h                |  17 +--
 include/net/sctp/constants.h           |   9 +-
 include/net/sctp/structs.h             |  35 ++----
 net/sctp/Kconfig                       |  47 ++-----
 net/sctp/auth.c                        | 166 +++++--------------------
 net/sctp/chunk.c                       |   3 +-
 net/sctp/endpointola.c                 |  23 ++--
 net/sctp/protocol.c                    |  11 +-
 net/sctp/sm_make_chunk.c               |  60 +++------
 net/sctp/sm_statefuns.c                |   2 +-
 net/sctp/socket.c                      |  41 +-----
 net/sctp/sysctl.c                      |  51 ++++----
 14 files changed, 122 insertions(+), 358 deletions(-)

base-commit: 8f5ae30d69d7543eee0d70083daf4de8fe15d585
-- 
2.50.1