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Commit Graph

9 Commits

Author SHA1 Message Date
Eric Biggers
c79b411eaa crypto: skcipher - remove remnants of internal IV generators
Remove dead code related to internal IV generators, which are no longer
used since they've been replaced with the "seqiv" and "echainiv"
templates.  The removed code includes:

- The "givcipher" (GIVCIPHER) algorithm type.  No algorithms are
  registered with this type anymore, so it's unneeded.

- The "const char *geniv" member of aead_alg, ablkcipher_alg, and
  blkcipher_alg.  A few algorithms still set this, but it isn't used
  anymore except to show via /proc/crypto and CRYPTO_MSG_GETALG.
  Just hardcode "<default>" or "<none>" in those cases.

- The 'skcipher_givcrypt_request' structure, which is never used.

Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2018-12-23 11:52:45 +08:00
Leonidas Da Silva Barbosa
9cfaf082b8 crypto: nx - Removing CTR mode from NX driver
CTR hardware implementation does not match with kernel spec causing a counter bug
where just low 8 bytes are used for counter, when should be all 16bytes.

Since we already have other counter modes working according with specs
not worth to keep CTR itself on NX.

Signed-off-by: Leonidas S. Barbosa <leosilva@linux.vnet.ibm.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2015-08-10 23:22:22 +08:00
Herbert Xu
030f4e9687 crypto: nx - Fix reentrancy bugs
This patch fixes a host of reentrancy bugs in the nx driver.  The
following algorithms are affected:

* CCM
* GCM
* CTR
* XCBC
* SHA256
* SHA512

The crypto API allows a single transform to be used by multiple
threads simultaneously.  For example, IPsec will use a single tfm
to process packets for a given SA.  As packets may arrive on
multiple CPUs that tfm must be reentrant.

The nx driver does try to deal with this by using a spin lock.
Unfortunately only the basic AES/CBC/ECB algorithms do this in
the correct way.

The symptom of these bugs may range from the generation of incorrect
output to memory corruption.

Cc: stable@vger.kernel.org
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2015-07-08 15:14:13 +08:00
Leonidas S. Barbosa
01a5aa08ef crypto: nx - Moving limit and bound logic in CTR and fix IV vector
The previous limits were estimated locally in a single step
basead on bound values, however it was not correct since
when given certain scatterlist the function nx_build_sg_lists
was consuming more sg entries than allocated causing a
memory corruption and crashes.

- This patch removes the old logic and replaces it into nx_sg_build_lists
in order to build a correct nx_sg list using the correct sg_max limit
and bounds.

IV vector was not set correctly to zero causing ctr crash in tcrypt tests.

- Fixed setting IV vector  bits to zero.

Signed-off-by: Leonidas S. Barbosa <leosilva@linux.vnet.ibm.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2014-11-06 23:15:01 +08:00
Marcelo Cerri
884d981b04 crypto: nx - fix limits to sg lists for AES-CTR
This patch updates the nx-aes-ctr implementation to perform several
hyper calls if needed in order to always respect the length limits for
scatter/gather lists.

Two different limits are considered:

 - "ibm,max-sg-len": maximum number of bytes of each scatter/gather
   list.

 - "ibm,max-sync-cop":
    - The total number of bytes that a scatter/gather list can hold.
    - The maximum number of elements that a scatter/gather list can have.

Reviewed-by: Joy Latten <jmlatten@linux.vnet.ibm.com>
Signed-off-by: Marcelo Cerri <mhcerri@linux.vnet.ibm.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2013-09-02 20:32:53 +10:00
Marcelo Cerri
a8fc391a15 crypto: nx - add offset to nx_build_sg_lists()
This patch includes one more parameter to nx_build_sg_lists() to skip
the given number of bytes from beginning of each sg list.

This is needed in order to implement the fixes for the AES modes to make
them able to process larger chunks of data.

Reviewed-by: Joy Latten <jmlatten@linux.vnet.ibm.com>
Signed-off-by: Marcelo Cerri <mhcerri@linux.vnet.ibm.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2013-09-02 20:32:52 +10:00
Marcelo Cerri
c849163b80 crypto: nx - fix concurrency issue
The NX driver uses the transformation context to store several fields
containing data related to the state of the operations in progress.
Since a single tfm can be used by different kernel threads at the same
time, we need to protect the data stored into the context.

This patch makes use of spin locks to protect the data where a race
condition can happen.

Reviewed-by: Fionnuala Gunter <fin@linux.vnet.ibm.com>
Reviewed-by: Joy Latten <jmlatten@linux.vnet.ibm.com>
Signed-off-by: Marcelo Cerri <mhcerri@linux.vnet.ibm.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2013-08-14 20:42:04 +10:00
Jussi Kivilinna
e15aa3692d crypto: drivers - remove cra_list initialization
Initialization of cra_list is currently mixed, most ciphers initialize this
field and most shashes do not. Initialization however is not needed at all
since cra_list is initialized/overwritten in __crypto_register_alg() with
list_add(). Therefore perform cleanup to remove all unneeded initializations
of this field in 'crypto/drivers/'.

Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: linux-geode@lists.infradead.org
Cc: Michal Ludvig <michal@logix.cz>
Cc: Dmitry Kasatkin <dmitry.kasatkin@nokia.com>
Cc: Varun Wadekar <vwadekar@nvidia.com>
Cc: Eric Bénard <eric@eukrea.com>
Signed-off-by: Jussi Kivilinna <jussi.kivilinna@mbnet.fi>
Acked-by: Kent Yoder <key@linux.vnet.ibm.com>
Acked-by: Vladimir Zapolskiy <vladimir_zapolskiy@mentor.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2012-08-01 17:47:28 +08:00
Kent Yoder
166659bce2 powerpc/crypto: AES-CTR mode routines for nx encryption
These routines add support for AES in CTR mode on the Power7+ CPU's
in-Nest accelerator driver.

Signed-off-by: Kent Yoder <key@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2012-05-16 15:05:42 +10:00