Commit Graph

13 Commits

Author SHA1 Message Date
Herbert Xu
fa64966473 crypto: shash - Fix digest size offset
When an shash algorithm is exported as ahash, ahash will access
its digest size through hash_alg_common.  That's why the shash
layout needs to match hash_alg_common.  This wasn't the case
because the alignment weren't identical.

This patch fixes the problem.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2009-07-15 21:16:05 +08:00
Herbert Xu
66f6ce5e52 crypto: ahash - Add unaligned handling and default operations
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: Herbert Xu <herbert@gondor.apana.org.au>
2009-07-15 12:40:40 +08:00
Herbert Xu
500b3e3c3d crypto: ahash - Remove old_ahash_alg
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: Herbert Xu <herbert@gondor.apana.org.au>
2009-07-14 20:29:57 +08:00
Herbert Xu
88056ec346 crypto: ahash - Convert to new style algorithms
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: Herbert Xu <herbert@gondor.apana.org.au>
2009-07-14 15:54:07 +08:00
Herbert Xu
113adefc73 crypto: shash - Make descsize a run-time attribute
This patch changes descsize to a run-time attribute so that
implementations can change it in their init functions.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2009-07-14 12:58:00 +08:00
Herbert Xu
aef73cfcb9 crypto: async - Use kzfree for requests
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: Herbert Xu <herbert@gondor.apana.org.au>
2009-07-12 10:46:03 +08:00
Herbert Xu
99d27e1c59 crypto: shash - Export/import hash state only
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: Herbert Xu <herbert@gondor.apana.org.au>
2009-07-11 18:23:32 +08:00
Herbert Xu
9749598633 crypto: shash - Add crypto_shash_blocksize
This function is needed by algorithms that don't know their own
block size, e.g., in s390 where the code is common between multiple
versions of SHA.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2009-02-18 16:48:06 +08:00
Herbert Xu
412e87ae5d crypto: shash - Fix tfm destruction
We were freeing an offset into the slab object instead of the
start.  This patch fixes it by calling crypto_destroy_tfm which
allows the correct address to be given.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2009-02-05 16:51:25 +11:00
Herbert Xu
dec8b78606 crypto: hash - Add import/export interface
It is often useful to save the partial state of a hash function
so that it can be used as a base for two or more computations.

The most prominent example is HMAC where all hashes start from
a base determined by the key.  Having an import/export interface
means that we only have to compute that base once rather than
for each message.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-12-25 11:01:30 +11:00
Herbert Xu
7b5a080b3c crypto: hash - Add shash interface
The shash interface replaces the current synchronous hash interface.
It improves over hash in two ways.  Firstly shash is reentrant,
meaning that the same tfm may be used by two threads simultaneously
as all hashing state is stored in a local descriptor.

The other enhancement is that shash no longer takes scatter list
entries.  This is because shash is specifically designed for
synchronous algorithms and as such scatter lists are unnecessary.

All existing hash users will be converted to shash once the
algorithms have been completely converted.

There is also a new finup function that combines update with final.
This will be extended to ahash once the algorithm conversion is
done.

This is also the first time that an algorithm type has their own
registration function.  Existing algorithm types will be converted
to this way in due course.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-12-25 11:01:26 +11:00
Herbert Xu
318e531392 crypto: hash - Add missing top-level functions
The top-level functions init/update/final were missing for ahash.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-08-13 20:08:44 +10:00
Herbert Xu
18e33e6d5c crypto: hash - Move ahash functions into crypto/hash.h
All new crypto interfaces should go into individual files as much
as possible in order to ensure that crypto.h does not collapse under
its own weight.

This patch moves the ahash code into crypto/hash.h and crypto/internal/hash.h
respectively.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-07-10 20:35:18 +08:00