From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-eopbgr140070.outbound.protection.outlook.com ([40.107.14.70]:64918 "EHLO EUR01-VE1-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1727059AbgHGQWd (ORCPT ); Fri, 7 Aug 2020 12:22:33 -0400 From: Andrei Botila Subject: [PATCH 21/22] crypto: qce - add check for xts input length equal to zero Date: Fri, 7 Aug 2020 19:20:09 +0300 Message-Id: <20200807162010.18979-22-andrei.botila@oss.nxp.com> In-Reply-To: <20200807162010.18979-1-andrei.botila@oss.nxp.com> References: <20200807162010.18979-1-andrei.botila@oss.nxp.com> Content-Type: text/plain MIME-Version: 1.0 Sender: linux-s390-owner@vger.kernel.org List-ID: To: Herbert Xu , "David S. Miller" Cc: linux-crypto@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-s390@vger.kernel.org, x86@kernel.org, linux-arm-kernel@axis.com, Andrei Botila From: Andrei Botila 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 --- 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