[RFC PATCH 00/11] nvme: implement secure concatenation

[hare@kernel.org]

From: Hannes Reinecke <hare@suse.de>

Hi all,

here's my attempt to implement secure concatenation for NVMe-of TCP
as outlined in TP8018.
Secure concatenation means that a TLS PSK is generated from the key
material negotiated by the DH-HMAC-CHAP protocol, and the TLS PSK
is then used for a subsequent TLS connection.
The difference between the original definition of secure concatenation
and the method outlined in TP8018 is that with TP8018 the connection
is reset after DH-HMAC-CHAP negotiation, and a new connection is setup
with the generated TLS PSK.

To implement that I have decided on resetting the connection from the
nvme-tcp driver after the initial connection has been set up.
Another way would have been to offload the connection reset to userspace,
and let nvme-cli reset the connection. But that would be a modification
to the userspace interface, and hence I didn't go that way.

As usual, comments and reviews are welcome.

Hannes Reinecke (11):
  crypto,fs: Separate out hkdf_extract() and hkdf_expand()
  nvme: add nvme_auth_generate_psk()
  nvme: add nvme_auth_generate_digest()
  nvme: add nvme_auth_derive_tls_psk()
  nvme-keyring: add nvme_tls_psk_refresh()
  nvme-keyring: restrict match length for version '1' identifiers
  nvme-tcp: check for invalidated or revoked key
  nvme-fabrics: authentication errors are not retryable
  nvme: add nvme_noretry_error()
  nvme-tcp: request secure channel concatenation
  nvmet-tcp: support secure channel concatenation

 crypto/Makefile                        |   1 +
 crypto/hkdf.c                          | 111 +++++++++++
 drivers/nvme/common/auth.c             | 252 +++++++++++++++++++++++++
 drivers/nvme/common/keyring.c          |  71 +++++++
 drivers/nvme/host/auth.c               | 108 ++++++++++-
 drivers/nvme/host/core.c               |   2 +-
 drivers/nvme/host/fabrics.c            |  46 ++++-
 drivers/nvme/host/fabrics.h            |   3 +
 drivers/nvme/host/fc.c                 |   4 +-
 drivers/nvme/host/nvme.h               |  10 +
 drivers/nvme/host/tcp.c                |  46 +++--
 drivers/nvme/target/auth.c             |  62 +++++-
 drivers/nvme/target/fabrics-cmd-auth.c |  43 ++++-
 drivers/nvme/target/fabrics-cmd.c      |  27 ++-
 drivers/nvme/target/nvmet.h            |  16 +-
 drivers/nvme/target/tcp.c              |  26 +++
 fs/crypto/hkdf.c                       |  68 +------
 include/crypto/hkdf.h                  |  18 ++
 include/linux/nvme-auth.h              |   5 +
 include/linux/nvme-keyring.h           |   7 +
 include/linux/nvme.h                   |   7 +
 21 files changed, 824 insertions(+), 109 deletions(-)
 create mode 100644 crypto/hkdf.c
 create mode 100644 include/crypto/hkdf.h

-- 
2.35.3