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Subject[PATCH 21/22] crypto: qce - 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.

Signed-off-by: Andrei Botila <andrei.botila@nxp.com>
---
drivers/crypto/qce/skcipher.c | 3 +++
1 file changed, 3 insertions(+)

diff --git a/drivers/crypto/qce/skcipher.c b/drivers/crypto/qce/skcipher.c
index 5630c5addd28..887fd4dc9b43 100644
--- a/drivers/crypto/qce/skcipher.c
+++ b/drivers/crypto/qce/skcipher.c
@@ -223,6 +223,9 @@ static int qce_skcipher_crypt(struct skcipher_request *req, int encrypt)
int keylen;
int ret;

+ if (!req->cryptlen && IS_XTS(rctx->flags))
+ return 0;
+
rctx->flags = tmpl->alg_flags;
rctx->flags |= encrypt ? QCE_ENCRYPT : QCE_DECRYPT;
keylen = IS_XTS(rctx->flags) ? ctx->enc_keylen >> 1 : ctx->enc_keylen;
--
2.17.1
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