diff mbox series

[15/22] crypto: ccp - add check for xts input length equal to zero

Message ID 20200807162010.18979-16-andrei.botila@oss.nxp.com (mailing list archive)
State Rejected
Delegated to: Herbert Xu
Headers show
Series crypto: add check for xts input length equal to zero | expand

Commit Message

Andrei Botila Aug. 7, 2020, 4:20 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: Tom Lendacky <thomas.lendacky@amd.com>
Cc: John Allen <john.allen@amd.com>
Signed-off-by: Andrei Botila <andrei.botila@nxp.com>
---
 drivers/crypto/ccp/ccp-crypto-aes-xts.c | 3 +++
 1 file changed, 3 insertions(+)
diff mbox series

Patch

diff --git a/drivers/crypto/ccp/ccp-crypto-aes-xts.c b/drivers/crypto/ccp/ccp-crypto-aes-xts.c
index 6849261ca47d..6a93b54d388a 100644
--- a/drivers/crypto/ccp/ccp-crypto-aes-xts.c
+++ b/drivers/crypto/ccp/ccp-crypto-aes-xts.c
@@ -113,6 +113,9 @@  static int ccp_aes_xts_crypt(struct skcipher_request *req,
 	u32 unit_size;
 	int ret;
 
+	if (!req->cryptlen)
+		return 0;
+
 	if (!ctx->u.aes.key_len)
 		return -EINVAL;