[RFC PATCH 0/4] crypto: (ec)dh - add privkey generation support

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Hi,

This is an RFC to discuss how to support private key generation for dh and
ecdh.

This is helpful in a user-space to kernel (ec)dh offload because the keys
are generated in kernel and never revealed to user-space.

Private key generation is also helpful to implement forward secrecy.
A public/private key system demonstrates the property of forward secrecy
if it creates new key pairs for each communication session. These
key pairs are generated on an as-needed basis and are destroyed after
the session is over. If an attacker were to record previous encrypted
session data, they wouldn't be able to decrypt it with possession of a
long-term key.

There are crypto accelerators that are capable of generating and retaining
private keys without revealing them to software. This patch set is a
prerequisite for hardware private key generation support.

Tudor Ambarus (4):
  crypto: ecc - add privkey generation support
  crypto: ecdh - allow user to provide NULL privkey
  crypto: dh - allow user to provide NULL privkey
  crypto: testmgr - add genkey kpp test

 crypto/dh.c      |  18 +++++++
 crypto/ecc.c     |  20 +++++++
 crypto/ecc.h     |  14 +++++
 crypto/ecdh.c    |   4 ++
 crypto/testmgr.c |  77 +++++++++++++++++++++++----
 crypto/testmgr.h | 155 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 6 files changed, 277 insertions(+), 11 deletions(-)

-- 
2.7.4




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