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Subject[RFC PATCH HBK: 0/8] HW BOUND KEY as TRUSTED KEY
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Hardware Bound key(HBK), is never acessible as plain key outside of the
hardware boundary. Thus, it is un-usable, even if somehow fetched
from kernel memory. It ensures run-time security.

This patchset adds generic support for classing the Hardware Bound Key,
based on:

- Newly added flag-'is_hbk', added to the tfm.

Consumer of the kernel crypto api, after allocating
the transformation, sets this flag based on the basis
of the type of key consumer has.

- This helps to influence the core processing logic
for the encapsulated algorithm.

- This flag is set by the consumer after allocating
the tfm and before calling the function crypto_xxx_setkey().

First implementation is based on CAAM.

NXP built CAAM IP is the Cryptographic Acceleration and Assurance Module.
This is contain by the i.MX and QorIQ SoCs by NXP.

CAAM is a suitable backend (source) for kernel trusted keys.
This backend source can be used for run-time security as well
by generating the hardware bound key.

Along with plain key, the CAAM generates black key. A black key is an
encrypted key, which can only be decrypted inside CAAM. Hence, CAAM's
black key can only be used by CAAM. Thus it is declared as a hardware bound key.

Pankaj Gupta (8):
keys-trusted: new cmd line option added
hw-bound-key: flag-is_hbk added to the tfm
sk_cipher: checking for hw bound operation
keys-trusted: re-factored caam based trusted key
caam blob-gen: moving blob_priv to caam_drv_private
KEYS: trusted: caam based black key
caam alg: symmetric key ciphers are updated
dm-crypt: consumer-app setting the flag-is_hbk

crypto/skcipher.c | 3 +-
drivers/crypto/caam/blob_gen.c | 242 ++++++++++++++++++++--
drivers/crypto/caam/caamalg.c | 37 +++-
drivers/crypto/caam/caamalg_desc.c | 8 +-
drivers/crypto/caam/desc.h | 8 +-
drivers/crypto/caam/desc_constr.h | 6 +-
drivers/crypto/caam/intern.h | 6 +-
drivers/md/dm-crypt.c | 6 +-
include/keys/trusted-type.h | 2 +
include/linux/crypto.h | 2 +
include/soc/fsl/caam-blob.h | 44 ++--
security/keys/trusted-keys/trusted_caam.c | 6 +
security/keys/trusted-keys/trusted_core.c | 14 ++
13 files changed, 333 insertions(+), 51 deletions(-)

--
2.17.1

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