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Miller" Subject: [PATCH 09/22] crypto: xts - add check for block length equal to zero Date: Fri, 7 Aug 2020 19:19:57 +0300 Message-Id: <20200807162010.18979-10-andrei.botila@oss.nxp.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200807162010.18979-1-andrei.botila@oss.nxp.com> References: <20200807162010.18979-1-andrei.botila@oss.nxp.com> X-ClientProxiedBy: AM0PR04CA0075.eurprd04.prod.outlook.com (2603:10a6:208:be::16) To VE1PR04MB6608.eurprd04.prod.outlook.com (2603:10a6:803:125::12) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from lsv15007.swis.ro-buh01.nxp.com (83.217.231.2) by AM0PR04CA0075.eurprd04.prod.outlook.com (2603:10a6:208:be::16) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3261.15 via Frontend Transport; Fri, 7 Aug 2020 16:21:57 +0000 X-Mailer: git-send-email 2.17.1 X-Originating-IP: [83.217.231.2] X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-HT: Tenant X-MS-Office365-Filtering-Correlation-Id: 4ad53ed7-587f-40a5-45ad-08d83aee01bd X-MS-TrafficTypeDiagnostic: VE1PR04MB7359: X-MS-Exchange-SharedMailbox-RoutingAgent-Processed: True X-MS-Exchange-Transport-Forked: True X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:4941; X-MS-Exchange-SenderADCheck: 1 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: rOh5w+s9PqbXc2jcZ1BQLHyncDirxVRD4jdekA7Syfswt/w/ROIwz/cJnzIzH4WUvJiZDv0QulE7Htc5MIKD602XM1VY8VMzU0g80LoPLGYHzt7/7UJVAFxNq5eIR5GcWId6Zb3M58Nca7paq3+lYFbCCFfNxd7vcU9NSI47TynJBU1d1DR7jgluWq3DOFc7pUyZ9H0briBJCZOHMoyzxDevONO8tskb9XLuh+i6ExZN1GEtzW4bQ+14PZZ2detPLy2CqGUuAA6DrTIHkaOiM+uXccbLMucwAWRh69r9e7LJ/iBmTZo+Zm5Tgu6L5rWlbZeVZ+MGCpIscCuREStLzA== X-Forefront-Antispam-Report: CIP:255.255.255.255; CTRY:; LANG:en; SCL:1; SRV:; IPV:NLI; SFV:NSPM; H:VE1PR04MB6608.eurprd04.prod.outlook.com; PTR:; CAT:NONE; SFTY:; SFS:(4636009)(39860400002)(366004)(136003)(346002)(396003)(376002)(44832011)(66556008)(66476007)(110136005)(1076003)(6506007)(4326008)(66946007)(83380400001)(8936002)(316002)(26005)(956004)(186003)(16526019)(478600001)(4744005)(86362001)(5660300002)(6512007)(2906002)(8676002)(2616005)(52116002)(6486002); DIR:OUT; SFP:1101; X-MS-Exchange-AntiSpam-MessageData: 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 X-OriginatorOrg: oss.nxp.com X-MS-Exchange-CrossTenant-Network-Message-Id: 4ad53ed7-587f-40a5-45ad-08d83aee01bd X-MS-Exchange-CrossTenant-AuthSource: VE1PR04MB6608.eurprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 07 Aug 2020 16:21:58.0772 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 686ea1d3-bc2b-4c6f-a92c-d99c5c301635 X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: mtzUDYpUxJDKeTHPmLQUJkyRjx+dqPhfHgSxMbe+Yb8h5Sh/MODD5fjBLixfwETkmiHrs/8IXe3CM5PEtXreTQ== X-MS-Exchange-Transport-CrossTenantHeadersStamped: VE1PR04MB7359 X-Mailman-Approved-At: Sat, 08 Aug 2020 10:06:29 +1000 X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-s390@vger.kernel.org, Andrei Botila , x86@kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@axis.com, linux-crypto@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-arm-kernel@lists.infradead.org Errors-To: linuxppc-dev-bounces+patchwork-incoming=ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" 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 --- crypto/xts.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/crypto/xts.c b/crypto/xts.c index 3c3ed02c7663..7df68f52fddc 100644 --- a/crypto/xts.c +++ b/crypto/xts.c @@ -263,6 +263,9 @@ static int xts_encrypt(struct skcipher_request *req) struct skcipher_request *subreq = &rctx->subreq; int err; + if (!req->cryptlen) + return 0; + err = xts_init_crypt(req, xts_encrypt_done) ?: xts_xor_tweak_pre(req, true) ?: crypto_skcipher_encrypt(subreq) ?: @@ -280,6 +283,9 @@ static int xts_decrypt(struct skcipher_request *req) struct skcipher_request *subreq = &rctx->subreq; int err; + if (!req->cryptlen) + return 0; + err = xts_init_crypt(req, xts_decrypt_done) ?: xts_xor_tweak_pre(req, false) ?: crypto_skcipher_decrypt(subreq) ?: