lkml.org 
[lkml]   [2020]   [Jan]   [29]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 3/4] crypto: ccree - fix some reported cipher block sizes
Date
OFB and CTR modes block sizes were wrongfully reported as
the underlying block sizes. Fix it to 1 bytes as they
turn the block ciphers into stream ciphers.

Also document why our XTS differes from the generic
implementation.

Signed-off-by: Gilad Ben-Yossef <gilad@benyossef.com>
---
drivers/crypto/ccree/cc_cipher.c | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/drivers/crypto/ccree/cc_cipher.c b/drivers/crypto/ccree/cc_cipher.c
index c08dee04941b..73457548ee92 100644
--- a/drivers/crypto/ccree/cc_cipher.c
+++ b/drivers/crypto/ccree/cc_cipher.c
@@ -1236,6 +1236,10 @@ static const struct cc_alg_template skcipher_algs[] = {
.sec_func = true,
},
{
+ /* See https://www.mail-archive.com/linux-crypto@vger.kernel.org/msg40576.html
+ * for the reason why this differs from the generic
+ * implementation.
+ */
.name = "xts(aes)",
.driver_name = "xts-aes-ccree",
.blocksize = 1,
@@ -1431,7 +1435,7 @@ static const struct cc_alg_template skcipher_algs[] = {
{
.name = "ofb(aes)",
.driver_name = "ofb-aes-ccree",
- .blocksize = AES_BLOCK_SIZE,
+ .blocksize = 1,
.template_skcipher = {
.setkey = cc_cipher_setkey,
.encrypt = cc_cipher_encrypt,
@@ -1584,7 +1588,7 @@ static const struct cc_alg_template skcipher_algs[] = {
{
.name = "ctr(sm4)",
.driver_name = "ctr-sm4-ccree",
- .blocksize = SM4_BLOCK_SIZE,
+ .blocksize = 1,
.template_skcipher = {
.setkey = cc_cipher_setkey,
.encrypt = cc_cipher_encrypt,
--
2.25.0
\
 
 \ /
  Last update: 2020-01-29 15:38    [W:0.071 / U:4.672 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site