lisa/android_kernel_xiaomi_sm8350
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

crypto: caam - update xts sector size for large input length

Browse Source 
commit 3f142b6a7b573bde6cff926f246da05652c61eb4 upstream.

Since in the software implementation of XTS-AES there is
no notion of sector every input length is processed the same way.
CAAM implementation has the notion of sector which causes different
results between the software implementation and the one in CAAM
for input lengths bigger than 512 bytes.
Increase sector size to maximum value on 16 bits.

Fixes: c6415a6016 ("crypto: caam - add support for acipher xts(aes)")
Cc: <stable@vger.kernel.org> # v4.12+
Signed-off-by: Andrei Botila <andrei.botila@nxp.com>
Reviewed-by: Horia Geantă <horia.geanta@nxp.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Andrei Botila 2020-02-28 12:46:48 +02:00 committed by Greg Kroah-Hartman
parent bc8413b626
commit f3f13f9794
1 changed files with 14 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
drivers/crypto/caam/caamalg_desc.c
View File

@ -1524,7 +1524,13 @@ EXPORT_SYMBOL(cnstr_shdsc_skcipher_decap);
*/
void cnstr_shdsc_xts_skcipher_encap(u32 * const desc, struct alginfo *cdata)
{
__be64 sector_size = cpu_to_be64(512);
/*
* Set sector size to a big value, practically disabling
* sector size segmentation in xts implementation. We cannot
* take full advantage of this HW feature with existing
* crypto API / dm-crypt SW architecture.
*/
__be64 sector_size = cpu_to_be64(BIT(15));
u32 *key_jump_cmd;
init_sh_desc(desc, HDR_SHARE_SERIAL | HDR_SAVECTX);
@ -1577,7 +1583,13 @@ EXPORT_SYMBOL(cnstr_shdsc_xts_skcipher_encap);
*/
void cnstr_shdsc_xts_skcipher_decap(u32 * const desc, struct alginfo *cdata)
{
__be64 sector_size = cpu_to_be64(512);
/*
* Set sector size to a big value, practically disabling
* sector size segmentation in xts implementation. We cannot
* take full advantage of this HW feature with existing
* crypto API / dm-crypt SW architecture.
*/
__be64 sector_size = cpu_to_be64(BIT(15));
u32 *key_jump_cmd;
init_sh_desc(desc, HDR_SHARE_SERIAL | HDR_SAVECTX);