[PATCHv13 0/9] nvme: In-band authentication support

[Hannes Reinecke]

Hi all,

recent updates to the NVMe spec have added definitions for in-band
authentication, and seeing that it provides some real benefit
especially for NVMe-TCP here's an attempt to implement it.

Thanks to Nicolai Stange the crypto DH framework has been upgraded
to provide us with a FFDHE implementation; I've updated the patchset
to use the ephemeral key generation provided there.

Note that this is just for in-band authentication. Secure
concatenation (ie starting TLS with the negotiated parameters)
requires a TLS handshake, which the in-kernel TLS implementation
does not provide. This is being worked on with a different patchset
which is still WIP.

The nvme-cli support has already been merged; please use the latest
nvme-cli git repository to build the most recent version.

A copy of this patchset can be found at
git://git.kernel.org/pub/scm/linux/kernel/git/hare/scsi-devel
branch auth.v13

The patchset is being cut against v5.18.

As usual, comments and reviews are welcome.

Changes to v12:
- Replaces crypto_has_shash() and crypto_has_kpp() helper
  with CONFIG_ checks
- Fixed kbuild robot warning in pr_fmt()

Changes to v11:
- Fixup type for FAILURE2 message (Prashant Nayak)
- Do not sent SUCCESS2 if bi-directional authentication is not
requested
  (Martin George)

Changes to v10:
- Fixup error return value when authentication failed

Changes to v9:
- Include review from Chaitanya
- Use sparse array for dhgroup and hash lookup
- Common function for auth_send and auth_receive

Changes to v8:
- Rebased to Nicolais crypto DH rework
- Fixed oops on non-fabrics devices

Changes to v7:
- Space out hash list and dhgroup list in nvme negotiate data
  to be conformant with the spec
    - Update sequence number handling to start with a random value and
        ignore '0' as mandated by the spec
	    - Update nvme_auth_generate_key to return the key as
	    suggested by
	        Sagi
		    - Add nvmet_parse_fabrics_io_cmd() as suggested by
		    hch

Changes to v6:
- Use 'u8' for DH group id and hash id
- Use 'struct nvme_dhchap_key'
- Rename variables to drop 'DHCHAP'
- Include reviews from Chaitanya

Changes to v5:
- Unify nvme_auth_generate_key()
- Unify nvme_auth_extract_key()
- Fixed bug where re-authentication with wrong controller key would
not fail
- Include reviews from Sagi

Changes to v4:
- Validate against blktest suite
- Fixup base64 decoding
- Transform secret with correct hmac algorithm

Changes to v3:
- Renamed parameter to 'dhchap_ctrl_key'
- Fixed bi-directional authentication
- Included reviews from Sagi
- Fixed base64 algorithm for transport encoding

Changes to v2:
- Dropped non-standard algorithms
- Reworked base64 based on fs/crypto/fname.c
- Fixup crash with no keys

Changes to the original submission:
- Included reviews from Vladislav
- Included reviews from Sagi
- Implemented re-authentication support
- Fixed up key handling

Hannes Reinecke (9):
  lib/base64: RFC4648-compliant base64 encoding
  nvme: add definitions for NVMe In-Band authentication
  nvme-fabrics: decode 'authentication required' connect error
  nvme: Implement In-Band authentication
  nvme-auth: Diffie-Hellman key exchange support
  nvmet: parse fabrics commands on io queues
  nvmet: Implement basic In-Band Authentication
  nvmet-auth: Diffie-Hellman key exchange support
  nvmet-auth: expire authentication sessions

 drivers/nvme/host/Kconfig              |   12 +
 drivers/nvme/host/Makefile             |    1 +
 drivers/nvme/host/auth.c               | 1470 ++++++++++++++++++++++++
 drivers/nvme/host/auth.h               |   40 +
 drivers/nvme/host/core.c               |  141 ++-
 drivers/nvme/host/fabrics.c            |   83 +-
 drivers/nvme/host/fabrics.h            |    7 +
 drivers/nvme/host/nvme.h               |   31 +
 drivers/nvme/host/rdma.c               |    1 +
 drivers/nvme/host/tcp.c                |    1 +
 drivers/nvme/host/trace.c              |   32 +
 drivers/nvme/target/Kconfig            |   13 +
 drivers/nvme/target/Makefile           |    1 +
 drivers/nvme/target/admin-cmd.c        |    4 +-
 drivers/nvme/target/auth.c             |  523 +++++++++
 drivers/nvme/target/configfs.c         |  133 ++-
 drivers/nvme/target/core.c             |   15 +
 drivers/nvme/target/fabrics-cmd-auth.c |  533 +++++++++
 drivers/nvme/target/fabrics-cmd.c      |   55 +-
 drivers/nvme/target/nvmet.h            |   75 +-
 include/linux/base64.h                 |   16 +
 include/linux/nvme.h                   |  204 +++-
 lib/Makefile                           |    2 +-
 lib/base64.c                           |  103 ++
 24 files changed, 3481 insertions(+), 15 deletions(-)
 create mode 100644 drivers/nvme/host/auth.c
 create mode 100644 drivers/nvme/host/auth.h
 create mode 100644 drivers/nvme/target/auth.c
 create mode 100644 drivers/nvme/target/fabrics-cmd-auth.c
 create mode 100644 include/linux/base64.h
 create mode 100644 lib/base64.c

-- 
2.29.2