linux-toradex.git/crypto/ahash.c, branch T20_LinuxImageV2.0Beta1_20121218

crypto: hash - Fix handling of small unaligned buffers

2010-08-06T01:26:38+00:00

If a scatterwalk chain contains an entry with an unaligned offset then
hash_walk_next() will cut off the next step at the next alignment point.

However, if the entry ends before the next alignment point then we a loop,
which leads to a kernel oops.

Fix this by checking whether the next aligment point is before the end of the
current entry.

Signed-off-by: Szilveszter Ördög 
Acked-by: David S. Miller 
Signed-off-by: Herbert Xu

crypto: hash - Fix handling of unaligned buffers

2010-03-03T00:03:23+00:00

The correct way to calculate the start of the aligned part of an
unaligned buffer is:

  offset = ALIGN(offset, alignmask + 1);

However, crypto_hash_walk_done() has:

  offset += alignmask - 1;
  offset = ALIGN(offset, alignmask + 1);

which actually skips a whole block unless offset % (alignmask + 1) == 1.

This patch fixes the problem.

Signed-off-by: Szilveszter Ördög 
Signed-off-by: Herbert Xu

crypto: ahash - Use GFP_KERNEL on allocation if the request can sleep

2009-07-24T05:56:31+00:00

ahash_op_unaligned() and ahash_def_finup() allocate memory atomically,
regardless whether the request can sleep or not. This patch changes
this to use GFP_KERNEL if the request can sleep.

Signed-off-by: Steffen Klassert 
Signed-off-by: Herbert Xu

crypto: ahash - Fix setkey crash

2009-07-15T12:39:05+00:00

When the alignment check was made unconditional for ahash we
may end up crashing on shash algorithms because we're always
calling alg->setkey instead of tfm->setkey.

This patch fixes it.

Signed-off-by: Herbert Xu

crypto: ahash - Add unaligned handling and default operations

2009-07-15T04:40:40+00:00

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

crypto: ahash - Use GFP_KERNEL in unaligned setkey

2009-07-14T13:48:35+00:00

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: Herbert Xu

crypto: hash - Zap unaligned buffers

2009-07-14T13:35:36+00:00

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: Herbert Xu

crypto: ahash - Remove old_ahash_alg

2009-07-14T12:29:57+00:00

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

crypto: ahash - Add instance/spawn support

2009-07-14T07:54:09+00:00

This patch adds support for creating ahash instances and using
ahash as spawns.

Signed-off-by: Herbert Xu

crypto: ahash - Convert to new style algorithms

2009-07-14T07:54:07+00:00

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