diff mbox series

[01/22] crypto: arm/aes-ce - add check for xts input length equal to zero

Message ID 20200807162010.18979-2-andrei.botila@oss.nxp.com (mailing list archive)
State Not Applicable
Headers show
Series crypto: add check for xts input length equal to zero | expand

Checks

Context Check Description
snowpatch_ozlabs/apply_patch success Successfully applied on branch powerpc/merge (3cd2184115b85cc8242fec3d42529cd112962984)
snowpatch_ozlabs/checkpatch success total: 0 errors, 0 warnings, 0 checks, 18 lines checked
snowpatch_ozlabs/needsstable success Patch has no Fixes tags

Commit Message

Andrei Botila Aug. 7, 2020, 4:19 p.m. UTC 
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 mbox series

Patch

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;