linux.git/include/crypto/internal/skcipher.h, branch v4.15

crypto: skcipher - introduce walksize attribute for SIMD algos

2016-12-30T11:52:47+00:00

In some cases, SIMD algorithms can only perform optimally when
allowed to operate on multiple input blocks in parallel. This is
especially true for bit slicing algorithms, which typically take
the same amount of time processing a single block or 8 blocks in
parallel. However, other SIMD algorithms may benefit as well from
bigger strides.

So add a walksize attribute to the skcipher algorithm definition, and
wire it up to the skcipher walk API. To avoid confusion between the
skcipher and AEAD attributes, rename the skcipher_walk chunksize
attribute to 'stride', and set it from the walksize (in the skcipher
case) or from the chunksize (in the AEAD case).

Signed-off-by: Ard Biesheuvel 
Signed-off-by: Herbert Xu

crypto: skcipher - Add separate walker for AEAD decryption

2016-12-01T13:06:17+00:00

The AEAD decrypt interface includes the authentication tag in
req->cryptlen.  Therefore we need to exlucde that when doing
a walk over it.

This patch adds separate walker functions for AEAD encryption
and decryption.

Signed-off-by: Herbert Xu 
Reviewed-by: Ard Biesheuvel

crypto: skcipher - Add skcipher walk interface

2016-11-28T13:23:17+00:00

This patch adds the skcipher walk interface which replaces both
blkcipher walk and ablkcipher walk.  Just like blkcipher walk it
can also be used for AEAD algorithms.

Signed-off-by: Herbert Xu

crypto: skcipher - Get rid of crypto_spawn_skcipher2()

2016-11-01T00:37:17+00:00

Since commit 3a01d0ee2b99 ("crypto: skcipher - Remove top-level
givcipher interface"), crypto_spawn_skcipher2() and
crypto_spawn_skcipher() are equivalent.  So switch callers of
crypto_spawn_skcipher2() to crypto_spawn_skcipher() and remove it.

Signed-off-by: Eric Biggers 
Signed-off-by: Herbert Xu

crypto: skcipher - Get rid of crypto_grab_skcipher2()

2016-11-01T00:37:16+00:00

Since commit 3a01d0ee2b99 ("crypto: skcipher - Remove top-level
givcipher interface"), crypto_grab_skcipher2() and
crypto_grab_skcipher() are equivalent.  So switch callers of
crypto_grab_skcipher2() to crypto_grab_skcipher() and remove it.

Signed-off-by: Eric Biggers 
Signed-off-by: Herbert Xu

crypto: skcipher - Remove unused crypto_lookup_skcipher() declaration

2016-10-21T03:03:41+00:00

The definition of crypto_lookup_skcipher() was already removed in
commit 3a01d0ee2b99 ("crypto: skcipher - Remove top-level givcipher
interface").  So the declaration should be removed too.

Signed-off-by: Eric Biggers 
Signed-off-by: Herbert Xu

crypto: skcipher - Remove top-level givcipher interface

2016-07-18T09:35:46+00:00

This patch removes the old crypto_grab_skcipher helper and replaces
it with crypto_grab_skcipher2.

As this is the final entry point into givcipher this patch also
removes all traces of the top-level givcipher interface, including
all implicit IV generators such as chainiv.

The bottom-level givcipher interface remains until the drivers
using it are converted.

Signed-off-by: Herbert Xu

crypto: skcipher - Add low-level skcipher interface

2016-07-18T09:35:36+00:00

This patch allows skcipher algorithms and instances to be created
and registered with the crypto API.  They are accessible through
the top-level skcipher interface, along with ablkcipher/blkcipher
algorithms and instances.

This patch also introduces a new parameter called chunk size
which is meant for ciphers such as CTR and CTS which ostensibly
can handle arbitrary lengths, but still behave like block ciphers
in that you can only process a partial block at the very end.

For these ciphers the block size will continue to be set to 1
as it is now while the chunk size will be set to the underlying
block size.

Signed-off-by: Herbert Xu

crypto: skcipher - Add top-level skcipher interface

2015-08-21T14:21:19+00:00

This patch introduces the crypto skcipher interface which aims
to replace both blkcipher and ablkcipher.

It's very similar to the existing ablkcipher interface.  The
main difference is the removal of the givcrypt interface.  In
order to make the transition easier for blkcipher users, there
is a helper SKCIPHER_REQUEST_ON_STACK which can be used to place
a request on the stack for synchronous transforms.

Signed-off-by: Herbert Xu

crypto: skcipher - Don't use __crypto_dequeue_request()

2014-06-20T13:26:05+00:00

Use skcipher_givcrypt_cast(crypto_dequeue_request(queue)) instead, which
does the same thing in much cleaner way. The skcipher_givcrypt_cast()
actually uses container_of() instead of messing around with offsetof()
too.

Signed-off-by: Marek Vasut 
Reported-by: Arnd Bergmann 
Cc: Pantelis Antoniou 
Signed-off-by: Herbert Xu