From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-eopbgr140057.outbound.protection.outlook.com ([40.107.14.57]:4231 "EHLO EUR01-VE1-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1725900AbgHGQV4 (ORCPT ); Fri, 7 Aug 2020 12:21:56 -0400 From: Andrei Botila Subject: [PATCH 05/22] crypto: powerpc/aes-spe - add check for xts input length equal to zero Date: Fri, 7 Aug 2020 19:19:53 +0300 Message-Id: <20200807162010.18979-6-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 , Benjamin Herrenschmidt , Paul Mackerras , Michael Ellerman 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. Cc: Benjamin Herrenschmidt Cc: Paul Mackerras Cc: Michael Ellerman Signed-off-by: Andrei Botila --- arch/powerpc/crypto/aes-spe-glue.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/arch/powerpc/crypto/aes-spe-glue.c b/arch/powerpc/crypto/aes-spe-glue.c index c2b23b69d7b1..f37d8bef322b 100644 --- a/arch/powerpc/crypto/aes-spe-glue.c +++ b/arch/powerpc/crypto/aes-spe-glue.c @@ -327,6 +327,9 @@ static int ppc_xts_encrypt(struct skcipher_request *req) u8 b[2][AES_BLOCK_SIZE]; int err; + if (!req->cryptlen) + return 0; + if (req->cryptlen < AES_BLOCK_SIZE) return -EINVAL; @@ -366,6 +369,9 @@ static int ppc_xts_decrypt(struct skcipher_request *req) le128 twk; int err; + if (!req->cryptlen) + return 0; + if (req->cryptlen < AES_BLOCK_SIZE) return -EINVAL; -- 2.17.1