linux.git/crypto/blkcipher.c, branch v2.6.24

[CRYPTO] blkcipher: Added blkcipher_walk_virt_block

2007-10-10T23:55:48+00:00

This patch adds the helper blkcipher_walk_virt_block which is similar to
blkcipher_walk_virt but uses a supplied block size instead of the block
size of the block cipher.  This is useful for CTR where the block size is
1 but we still want to walk by the block size of the underlying cipher.

Signed-off-by: Herbert Xu

[CRYPTO] blkcipher: Increase kmalloc amount to aligned block size

2007-10-10T23:55:48+00:00

Now that the block size is no longer a multiple of the alignment, we need to
increase the kmalloc amount in blkcipher_next_slow to use the aligned block
size.

Signed-off-by: Herbert Xu

[CRYPTO] blkcipher: Remove alignment restriction on block size

2007-10-10T23:55:46+00:00

Previously we assumed for convenience that the block size is a multiple of
the algorithm's required alignment.  With the pending addition of CTR this
will no longer be the case as the block size will be 1 due to it being a
stream cipher.  However, the alignment requirement will be that of the
underlying implementation which will most likely be greater than 1.

Signed-off-by: Herbert Xu

[CRYPTO] blkcipher: Use max() in blkcipher_get_spot() to state the intention

2007-10-10T23:55:44+00:00

Use max in blkcipher_get_spot() instead of open coding it.

Signed-off-by: Ingo Oeser 
Signed-off-by: Herbert Xu

[CRYPTO] api: Add missing headers for setkey_unaligned

2007-10-10T23:55:40+00:00

This patch ensures that kernel.h and slab.h are included for
the setkey_unaligned function.  It also breaks a couple of
long lines.

Signed-off-by: Herbert Xu

[CRYPTO] blkcipher: Fix inverted test in blkcipher_get_spot

2007-09-10T07:51:11+00:00

The previous patch had the conditional inverted.  This patch fixes it
so that we return the original position if it does not straddle a page.

Thanks to Bob Gilligan for spotting this.

Signed-off-by: Herbert Xu

[CRYPTO] blkcipher: Fix handling of kmalloc page straddling

2007-09-09T07:45:21+00:00

The function blkcipher_get_spot tries to return a buffer of
the specified length that does not straddle a page.  It has
an off-by-one bug so it may advance a page unnecessarily.

What's worse, one of its callers doesn't provide a buffer
that's sufficiently long for this operation.

This patch fixes both problems.  Thanks to Bob Gilligan for
diagnosing this problem and providing a fix.

Signed-off-by: Herbert Xu

[CRYPTO] api: fix writting into unallocated memory in setkey_aligned

2007-08-06T07:33:56+00:00

setkey_unaligned() commited in ca7c39385ce1a7b44894a4b225a4608624e90730
overwrites unallocated memory in the following memset() because
I used the wrong buffer length.

Signed-off-by: Sebastian Siewior 
Signed-off-by: Herbert Xu

[CRYPTO] api: Handle unaligned keys in setkey

2007-07-11T12:58:54+00:00

setkey() in {cipher,blkcipher,ablkcipher,hash}.c does not respect the
requested alignment by the algorithm. This patch fixes it. The extra
memory is allocated by kmalloc() with GFP_ATOMIC flag.

Signed-off-by: Sebastian Siewior 
Signed-off-by: Herbert Xu

[CRYPTO] api: Add async block cipher interface

2007-05-02T04:38:30+00:00

This patch adds the frontend interface for asynchronous block ciphers.
In addition to the usual block cipher parameters, there is a callback
function pointer and a data pointer.  The callback will be invoked only
if the encrypt/decrypt handlers return -EINPROGRESS.  In other words,
if the return value of zero the completion handler (or the equivalent
code) needs to be invoked by the caller.

The request structure is allocated and freed by the caller.  Its size
is determined by calling crypto_ablkcipher_reqsize().  The helpers
ablkcipher_request_alloc/ablkcipher_request_free can be used to manage
the memory for a request.

Signed-off-by: Herbert Xu