git: opencrypto - Adjust xforms for explicit extra IV

[Alex Hornung]

commit 400158c16f9e4f8a627fb510bb1c69ae6a5c021b
Author: Alex Hornung <ahornung at gmail.com>
Date:   Sun Aug 22 20:06:22 2010 +0100

    opencrypto - Adjust xforms for explicit extra IV
    
    * Some transforms such as XTS and CTR have some private 'IV'. Since our
      cryptosoft is now concurrent, we need to keep that private IV per-op
      and not per-session as OpenBSD does. We do this by passing in the
      local IV to encrypt() and decrypt() functions, as well as reinit(),
      which was already getting it.
    
    * We can now also use AES-XTS and AES-CTR in a concurrent environment
      without having to have multiple sessions or an explicit key.
    
    * While here, also radically simplify the reinit() for XTS.
    
    * With these changes we can now use aes-xts for dm_target_crypt
      successfully.

Summary of changes:
 sys/opencrypto/cryptosoft.c |   40 +++++++-------
 sys/opencrypto/xform.c      |  122 +++++++++++++++++++++++--------------------
 sys/opencrypto/xform.h      |    4 +-
 3 files changed, 87 insertions(+), 79 deletions(-)

http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/400158c16f9e4f8a627fb510bb1c69ae6a5c021b


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