The previous change to allow hashing from states other than the
initial broke compilation on i386 because the inline assembly
tried to squeeze a u64 into a 32-bit register.  As we've already
checked for 32-bit overflows we can simply truncate it to u32,
or unsigned long so that we don't truncate at all on x86-64.
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

If shash_alloc_instance() fails, we return the wrong error value.
This patch fixes it.
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

If shash_alloc_instance() fails, we return the wrong error value.
This patch fixes it.
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

If cryptd_alloc_instance() fails, the return value is uninitialized.
This patch fixes this by setting the return value.
Signed-off-by: NSteffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

The crypto4xx SHA implementation keeps the hash state in the tfm
data structure.  This breaks a fundamental requirement of ahash
implementations that they must be reentrant.

This patch disables the broken implementation.
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

This patch exports the finup operation where available and adds
a default finup operation for ahash.  The operations final, finup
and digest also will now deal with unaligned result pointers by
copying it.  Finally export/import operations are will now be
exported too.
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

We currently use GFP_ATOMIC in the unaligned setkey function
to allocate the temporary aligned buffer.  Since setkey must
be called in a sleepable context, we can use GFP_KERNEL instead.
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

When we encounter an unaligned pointer we are supposed to copy
it to a temporary aligned location.  However the temporary buffer
isn't aligned properly.  This patch fixes that.
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

Some unaligned buffers on the stack weren't zapped properly which
may cause secret data to be leaked.  This patch fixes them by doing
a zero memset.

It is also possible for us to place random kernel stack contents
in the digest buffer if a digest operation fails.  This is fixed
by only copying if the operation succeeded.
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

Now that all ahash implementations have been converted to the new
ahash type, we can remove old_ahash_alg and its associated support.
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

This patch changes crypto4xx to use the new style ahash type.
In particular, we now use ahash_alg to define ahash algorithms
instead of crypto_alg.

This is achieved by introducing a union that encapsulates the
new type and the existing crypto_alg structure.  They're told
apart through a u32 field containing the type value.
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

This patch changes cryptd to use the new style ahash type.  In
particular, the instance is enlarged to encapsulate the new
ahash_alg structure.
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

This patch changes cryptd to use the template->create function
instead of alloc in anticipation for the switch to new style
ahash algorithms.
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

This patch adds the helpers crypto_drop_ahash and crypto_drop_shash
so that these spawns can be dropped without ugly casts.
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

This patch adds a mask parameter to complement the existing type
parameter.  This is useful when instantiating algorithms that
require a mask other than the default, e.g., ahash algorithms.
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

This patch adds support for creating ahash instances and using
ahash as spawns.
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

This patch converts crypto_ahash to the new style.  The old ahash
algorithm type is retained until the existing ahash implementations
are also converted.  All ahash users will automatically get the
new crypto_ahash type.
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

As the extsize and init_tfm functions belong to the frontend the
frontend argument is superfluous.
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

This patch makes crypto4xx use crypto_ahash_set_reqsize to avoid
accessing crypto_ahash directly.
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

This patch makes cryptd use crypto_ahash_set_reqsize to avoid
accessing crypto_ahash directly.
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

This patch adds the helper crypto_ahash_set_reqsize so that
implementations do not directly access the crypto_ahash structure.
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

This patch changes cryptd to use shash algorithms instead of the
legacy hash interface.
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

This patch exports the async functions so that they can be reused
by cryptd when it switches over to using shash.
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

This patch removes the implementation of hash and digest now that
no algorithms use them anymore.  The interface though will remain
until the users are converted across.
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

Now that there are no more legacy hash implementations we can
remove the reference to crypto_hash.
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

This patch converts the xcbc algorithm to the new shash type.
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

This patch changes hmac to the new shash interface.
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

This patch converts the padlock-sha implementation to shash.
In doing so the existing mechanism of storing the data until
final is no longer viable as we do not have a way of allocating
data in crypto_shash_init and then reliably freeing it.

This is just as well because a better way of handling the problem
is to hash everything but the last chunk using normal sha code
and then provide the intermediate result to the padlock device.

This is good enough because the primary application of padlock-sha
is IPsec and there the data is laid out in the form of an hmac
header followed by the rest of the packet.  In essence we can
provide all the data to the padlock as the hmac header only needs
to be hashed once.
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

This patch changes descsize to a run-time attribute so that
implementations can change it in their init functions.
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

This patch changes the kfree call to kzfree for async requests.
As the request may contain sensitive data it needs to be zeroed
before it can be reallocated by others.
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

This patch moves the run-time null setkey check to shash_prepare_alg
just like we did for finup/digest.
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

This patch changes padlock sha fallback to shash instead of hash.
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

This patch adds export/import support to sha256-s390.  The exported
type is defined by struct sha256_state, which is basically the entire
descriptor state of sha256_generic.
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

This patch adds export/import support to sha1-s390.  The exported
type is defined by struct sha1_state, which is basically the entire
descriptor state of sha1_generic.
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

This patch adds export/import support to sha256_generic.  The exported
type is defined by struct sha256_state, which is basically the entire
descriptor state of sha256_generic.
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

This patch replaces the two 32-bit counter code in sha256_generic
with the simpler 64-bit counter code from sha1.
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

This patch adds export/import support to sha1_generic.  The exported
type is defined by struct sha1_state, which is basically the entire
descriptor state of sha1_generic.
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

This patch moves the run-time null finup/digest checks to the
shash_prepare_alg function which is run at registration time.
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

This patch replaces the full descriptor export with an export of
the partial hash state.  This allows the use of a consistent export
format across all implementations of a given algorithm.

This is useful because a number of cases require the use of the
partial hash state, e.g., PadLock can use the SHA1 hash state
to get around the fact that it can only hash contiguous data
chunks.
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

This patch allows crypto_drop_spawn to be called on spawns that
have not been initialised or have failed initialisation.  This
fixes potential crashes during initialisation without adding
special case code.
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>