Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Based on test code by: Giorgio Vazzana <mywing81@gmail.com>
Signed-off-by: Martin Storsjö <martin@martin.st>

Signed-off-by: Martin Storsjö <martin@martin.st>

Based on a patch by Michael Niedermayer.
Signed-off-by: Martin Storsjö <martin@martin.st>

iv decrypt handling code needs to be executed regardless of CONFIG_SMALL
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

this simplifies things are avoids a temporary
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Based on test code by: Giorgio Vazzana <mywing81@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

In CBC mode, when src=dst and we are decrypting a block different
from the first one, we need to save the current block of ciphertext
(which will constitute the initialization vector for the next block)
before we overwrite it.
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Previously it was interpreted as number of bytes, while the
documentation stated that it was the number of 8 byte blocks.
This makes it behave similarly to the existing AES code.
Signed-off-by: Martin Storsjö <martin@martin.st>

Should slightly improve performance depending on the compiler used.

Signed-off-by: Martin Storsjö <martin@martin.st>