[dm-devel] [PATCH v2 0/4] crypto: switch to crypto API for ESSIV generation

[Ard Biesheuvel]

This series creates an ESSIV template that produces a skcipher or AEAD
transform based on a tuple of the form '<skcipher>,<cipher>,<shash>'
(or '<aead>,<cipher>,<shash>' for the AEAD case). It exposes the
encapsulated sync or async skcipher/aead by passing through all operations,
while using the cipher/shash pair to transform the input IV into an ESSIV
output IV.

This matches what both users of ESSIV in the kernel do, and so it is proposed
as a replacement for those, in patches #2 and #4.

This code has been tested using the fscrypt test suggested by Eric
(generic/549), as well as the mode-test script suggested by Milan for
the dm-crypt case. I also tested the aead case in a virtual machine,
but it definitely needs some wider testing from the dm-crypt experts.

Cc: Herbert Xu <herbert at gondor.apana.org.au>
Cc: Eric Biggers <ebiggers at google.com>
Cc: dm-devel at redhat.com
Cc: linux-fscrypt at vger.kernel.org
Cc: Gilad Ben-Yossef <gilad at benyossef.com>
Cc: Milan Broz <gmazyland at gmail.com>

Ard Biesheuvel (4):
  crypto: essiv - create wrapper template for ESSIV generation
  fs: crypto: invoke crypto API for ESSIV handling
  md: dm-crypt: infer ESSIV block cipher from cipher string directly
  md: dm-crypt: switch to ESSIV crypto API template

 crypto/Kconfig              |   4 +
 crypto/Makefile             |   1 +
 crypto/essiv.c              | 624 ++++++++++++++++++++
 drivers/md/Kconfig          |   1 +
 drivers/md/dm-crypt.c       | 237 ++------
 fs/crypto/Kconfig           |   1 +
 fs/crypto/crypto.c          |   5 -
 fs/crypto/fscrypt_private.h |   9 -
 fs/crypto/keyinfo.c         |  88 +--
 9 files changed, 675 insertions(+), 295 deletions(-)
 create mode 100644 crypto/essiv.c

-- 
2.17.1