Hi all, here's my attempt to implement secure concatenation for NVMe-of TCP as outlined in TP8018. The original (v5) patchset had been split in two, the first part of which has already been merged with nvme-6.11, and this is the second part which actually implements secure concatenation. 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 Sagi came up with the idea to directly reset the admin queue once the DH-CHAP negotiation has completed; that way it will be transparent to the upper layers and we don't have to worry about exposing queues which should not be used. A blktest submission is in https://github.com/osandov/blktests/pull/147 in case anyone want to run their own tests. As usual, comments and reviews are welcome. Patchset can be found at git.kernel.org:/pub/scm/linux/kernel/git/hare/nvme.git branch secure-concat.v11 Changes to v10: - Include reviews from Eric Biggers - Drop test vectors for SHA1 - Add test vectors for SHA384 and SHA512 - Include reviews from Mark O'Donovan Changes to v9: - Include reviews from Eric Biggers - Fixup secure concatenation after reset - Rebased to nvme-6.12 Changes to v8: - Include reviews from Eric Biggers - Make hkdf a proper module - Add testcases for hkdf Changes to v7: - Add patch to display nvme target TLS status in debugfs - Include reviews from Sagi Changes to v6: - Rebase to nvme-6.11 Changes to v5: - Include reviews from Sagi - Split patchset in two parts Changes to v4: - Rework reset admin queue functionality based on an idea from Sagi (thanks!) - kbuild robot fixes - Fixup dhchap negotiation with non-empty C2 value Changes to v3: - Include reviews from Sagi - Do not start I/O queues after DH-HMAC-CHAP negotiation - Use bool to indicate TLS has been enabled on a queue - Add 'tls_keyring' sysfs attribute - Add 'tls_configured_key' sysfs attribute Changes to v2: - Fixup reset after dhchap negotiation - Disable namespace scanning on I/O queues after dhchap negotiation - Reworked TLS key handling (again) Changes to the original submission: - Sanitize TLS key handling - Fixup modconfig compilation Hannes Reinecke (9): 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-tcp: request secure channel concatenation nvme-fabrics: reset admin connection for secure concatenation nvmet-tcp: support secure channel concatenation nvmet: add tls_concat and tls_key debugfs entries crypto/Kconfig | 6 + crypto/Makefile | 1 + crypto/hkdf.c | 573 +++++++++++++++++++++++++ drivers/nvme/common/Kconfig | 1 + drivers/nvme/common/auth.c | 346 +++++++++++++++ drivers/nvme/common/keyring.c | 64 +++ drivers/nvme/host/auth.c | 108 ++++- drivers/nvme/host/fabrics.c | 34 +- drivers/nvme/host/fabrics.h | 3 + drivers/nvme/host/nvme.h | 2 + drivers/nvme/host/sysfs.c | 4 +- drivers/nvme/host/tcp.c | 56 ++- drivers/nvme/target/auth.c | 72 +++- drivers/nvme/target/debugfs.c | 27 ++ drivers/nvme/target/fabrics-cmd-auth.c | 49 ++- drivers/nvme/target/fabrics-cmd.c | 33 +- drivers/nvme/target/nvmet.h | 38 +- drivers/nvme/target/tcp.c | 23 +- fs/crypto/Kconfig | 1 + fs/crypto/hkdf.c | 85 +--- include/crypto/hkdf.h | 20 + include/linux/nvme-auth.h | 7 + include/linux/nvme-keyring.h | 9 + include/linux/nvme.h | 7 + 24 files changed, 1462 insertions(+), 107 deletions(-) create mode 100644 crypto/hkdf.c create mode 100644 include/crypto/hkdf.h -- 2.35.3
