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Subject[PATCH 01/22] crypto: arm/aes-ce - add check for xts input length equal to zero
Date
From: Andrei Botila <andrei.botila@nxp.com>

Standardize the way input lengths equal to 0 are handled in all skcipher
algorithms. All the algorithms return 0 for input lengths equal to zero.

Cc: Russell King <linux@armlinux.org.uk>
Signed-off-by: Andrei Botila <andrei.botila@nxp.com>
---
arch/arm/crypto/aes-ce-glue.c | 6 ++++++
1 file changed, 6 insertions(+)

diff --git a/arch/arm/crypto/aes-ce-glue.c b/arch/arm/crypto/aes-ce-glue.c
index b668c97663ec..57a9cf7fe98a 100644
--- a/arch/arm/crypto/aes-ce-glue.c
+++ b/arch/arm/crypto/aes-ce-glue.c
@@ -452,6 +452,9 @@ static int xts_encrypt(struct skcipher_request *req)
struct scatterlist *src, *dst;
struct skcipher_walk walk;

+ if (!req->cryptlen)
+ return 0;
+
if (req->cryptlen < AES_BLOCK_SIZE)
return -EINVAL;

@@ -524,6 +527,9 @@ static int xts_decrypt(struct skcipher_request *req)
struct scatterlist *src, *dst;
struct skcipher_walk walk;

+ if (!req->cryptlen)
+ return 0;
+
if (req->cryptlen < AES_BLOCK_SIZE)
return -EINVAL;

--
2.17.1
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