[PATCH v4 0/4] crypto: Key Derivation Function (SP800-108)

[Stephan Mueller <smueller@chronox.de>]

Hi,

this patch set implements all three key derivation functions defined in
SP800-108.

The implementation is provided as a template for random number generators,
since a KDF can be considered a form of deterministic RNG where the key
material is used as a seed.

With the KDF implemented as a template, all types of keyed and
non-keyed hashes can be utilized, including HMAC and CMAC. The testmgr
tests are derived from publicly available test vectors from NIST.

The KDF are all tested with a complete round of CAVS testing on 32 and 64 bit.

The patch set introduces an extension to the kernel crypto API in the first
patch by adding a template handling for random number generators based on the
same logic as for keyed hashes.

Changes v4:
* removal of the check that src and dst buffers are not the same from the KDF
  implementations as requested by Herbert
* implement and use new free API in the RNG instance handling as requested
  by Herbert
* move the instance handling code from include/crypto/rng.h to
  include/crypto/internal/rng.h

Changes v3:
* port testmgr patch to current cryptodev-2.6 tree
* add non-keyed KDF references to testmgr.c

Changes v2:
* port to 4.7-rc1

Stephan Mueller (4):
  crypto: add template handling for RNGs
  crypto: kdf - add known answer tests
  crypto: kdf - SP800-108 Key Derivation Function
  crypto: kdf - enable compilation

 crypto/Kconfig                |   7 +
 crypto/Makefile               |   1 +
 crypto/kdf.c                  | 508 ++++++++++++++++++++++++++++++++++++++++++
 crypto/rng.c                  |  32 +++
 crypto/testmgr.c              | 226 +++++++++++++++++++
 crypto/testmgr.h              | 110 +++++++++
 include/crypto/internal/rng.h |  38 ++++
 7 files changed, 922 insertions(+)
 create mode 100644 crypto/kdf.c

-- 
2.7.4