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Fri, 15 Nov 2019 13:49:07 +0000 From: To: CC: , , , , , , Subject: [PATCH 1/2] crypto: atmel-tdes - Set the IV after {en,de}crypt Thread-Topic: [PATCH 1/2] crypto: atmel-tdes - Set the IV after {en,de}crypt Thread-Index: AQHVm7tzmqQuq6l82kiSJWdwlyo4Og== Date: Fri, 15 Nov 2019 13:49:06 +0000 Message-ID: <20191115134854.30190-1-tudor.ambarus@microchip.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-clientproxiedby: BE0P281CA0017.DEUP281.PROD.OUTLOOK.COM (2603:10a6:b10:a::27) To MN2PR11MB4448.namprd11.prod.outlook.com (2603:10b6:208:193::29) x-ms-exchange-messagesentrepresentingtype: 1 x-mailer: git-send-email 2.9.5 x-originating-ip: [94.177.32.156] x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: 382fa047-a7e5-42b0-9982-08d769d2955e x-ms-traffictypediagnostic: MN2PR11MB4159: x-ms-exchange-transport-forked: True x-microsoft-antispam-prvs: x-ms-oob-tlc-oobclassifiers: OLM:4941; x-forefront-prvs: 02229A4115 x-forefront-antispam-report: SFV:NSPM;SFS:(10009020)(136003)(346002)(366004)(39860400002)(396003)(376002)(199004)(189003)(14444005)(102836004)(66446008)(6916009)(14454004)(2351001)(26005)(50226002)(6116002)(36756003)(71200400001)(3846002)(52116002)(99286004)(25786009)(8936002)(5660300002)(71190400001)(6506007)(6436002)(386003)(8676002)(6486002)(107886003)(2501003)(66476007)(66946007)(66556008)(6512007)(478600001)(64756008)(5640700003)(1730700003)(81156014)(81166006)(186003)(1076003)(7736002)(305945005)(316002)(2616005)(4326008)(54906003)(486006)(476003)(256004)(66066001)(2906002)(86362001)(142933001);DIR:OUT;SFP:1101;SCL:1;SRVR:MN2PR11MB4159;H:MN2PR11MB4448.namprd11.prod.outlook.com;FPR:;SPF:None;LANG:en;PTR:InfoNoRecords;A:1;MX:1; received-spf: None (protection.outlook.com: microchip.com does not designate permitted sender hosts) x-ms-exchange-senderadcheck: 1 x-microsoft-antispam: BCL:0; x-microsoft-antispam-message-info: oNRhIqAUr/BSV2O47QOoqqe+ReFfeMeWrW2JpHy59iWdLxuSJoeMAKFqSCAcCwAX1qxQVrwq2iAh9gPmriFU9cLbcWcH7kvD6X0vmqEkESM0oWoGy7eO47gF6nvD2sk274zVfFkSxyIQzjmWNj5xUTWzui2og1EAOEKaCIcTPNrph+w9YDYOzNl/9R0a0f5nGXwZVBQn3nvfUI2diSne5M/L+JB2htYHD4lhzKfZX7xG8G4bwaeBq1dwL0t7PwNRrmrOr8lTIbrFzu0FBC6L1SykmHGs4y3UCNhfIo8hFUozEekV4hWcdzvcgyrjSF5zpMiyWfcjCrB5B02+lbPnbQDZZ/3tm/Iht6yssW2NBRAhGh4BP4a2KgYGYSuQMwtY/y+4FGomFyZgkxHM9e0fch2hb3yBdxO/m1UoXopIt1dyxraLWT6HNVL5ih/JKkZA MIME-Version: 1.0 X-MS-Exchange-CrossTenant-Network-Message-Id: 382fa047-a7e5-42b0-9982-08d769d2955e X-MS-Exchange-CrossTenant-originalarrivaltime: 15 Nov 2019 13:49:06.9376 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 3f4057f3-b418-4d4e-ba84-d55b4e897d88 X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: VqZRjXC334x6dOT7iMU2/yhmiDi+ttf8Nh4Ix5PRlgmVeSiSOv/SERsAlaBrr1iHtNBDUePXu3yDQNGHFa48XI5K7e0zuKlT58UGP55hbps= X-MS-Exchange-Transport-CrossTenantHeadersStamped: MN2PR11MB4159 Sender: linux-crypto-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-crypto@vger.kernel.org From: Tudor Ambarus The req->iv of the skcipher_request is expected to contain the last ciphertext block when the {en,de}crypt operation is done. In case of in-place decryption, copy the ciphertext in an intermediate buffer before decryption. This fixes the following tcrypt tests: alg: skcipher: atmel-cbc-des encryption test failed (wrong output IV) on test vector 0, cfg="in-place" 00000000: fe dc ba 98 76 54 32 10 alg: skcipher: atmel-cbc-tdes encryption test failed (wrong output IV) on test vector 0, cfg="in-place" 00000000: 7d 33 88 93 0f 93 b2 42 Signed-off-by: Tudor Ambarus --- drivers/crypto/atmel-tdes.c | 40 ++++++++++++++++++++++++++++++++++++++-- 1 file changed, 38 insertions(+), 2 deletions(-) diff --git a/drivers/crypto/atmel-tdes.c b/drivers/crypto/atmel-tdes.c index bb7c0a387c04..0c1f79b30fc1 100644 --- a/drivers/crypto/atmel-tdes.c +++ b/drivers/crypto/atmel-tdes.c @@ -81,6 +81,7 @@ struct atmel_tdes_ctx { struct atmel_tdes_reqctx { unsigned long mode; + u8 lastc[DES_BLOCK_SIZE]; }; struct atmel_tdes_dma { @@ -572,6 +573,30 @@ static int atmel_tdes_crypt_start(struct atmel_tdes_dev *dd) return err; } +static void +atmel_tdes_set_iv_as_last_ciphertext_block(struct atmel_tdes_dev *dd) +{ + struct skcipher_request *req = dd->req; + struct atmel_tdes_reqctx *rctx = skcipher_request_ctx(req); + struct crypto_skcipher *skcipher = crypto_skcipher_reqtfm(req); + unsigned int ivsize = crypto_skcipher_ivsize(skcipher); + + if (req->cryptlen < ivsize) + return; + + if (rctx->mode & TDES_FLAGS_ENCRYPT) { + scatterwalk_map_and_copy(req->iv, req->dst, + req->cryptlen - ivsize, ivsize, 0); + } else { + if (req->src == req->dst) + memcpy(req->iv, rctx->lastc, ivsize); + else + scatterwalk_map_and_copy(req->iv, req->src, + req->cryptlen - ivsize, + ivsize, 0); + } +} + static void atmel_tdes_finish_req(struct atmel_tdes_dev *dd, int err) { struct skcipher_request *req = dd->req; @@ -580,6 +605,8 @@ static void atmel_tdes_finish_req(struct atmel_tdes_dev *dd, int err) dd->flags &= ~TDES_FLAGS_BUSY; + atmel_tdes_set_iv_as_last_ciphertext_block(dd); + req->base.complete(&req->base, err); } @@ -668,8 +695,8 @@ static int atmel_tdes_crypt_dma_stop(struct atmel_tdes_dev *dd) static int atmel_tdes_crypt(struct skcipher_request *req, unsigned long mode) { - struct atmel_tdes_ctx *ctx = crypto_skcipher_ctx( - crypto_skcipher_reqtfm(req)); + struct crypto_skcipher *skcipher = crypto_skcipher_reqtfm(req); + struct atmel_tdes_ctx *ctx = crypto_skcipher_ctx(skcipher); struct atmel_tdes_reqctx *rctx = skcipher_request_ctx(req); if (mode & TDES_FLAGS_CFB8) { @@ -700,6 +727,15 @@ static int atmel_tdes_crypt(struct skcipher_request *req, unsigned long mode) rctx->mode = mode; + if (!(mode & TDES_FLAGS_ENCRYPT) && req->src == req->dst) { + unsigned int ivsize = crypto_skcipher_ivsize(skcipher); + + if (req->cryptlen >= ivsize) + scatterwalk_map_and_copy(rctx->lastc, req->src, + req->cryptlen - ivsize, + ivsize, 0); + } + return atmel_tdes_handle_queue(ctx->dd, req); } From patchwork Fri Nov 15 13:49:09 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tudor Ambarus X-Patchwork-Id: 11246385 X-Patchwork-Delegate: herbert@gondor.apana.org.au Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id D4D74930 for ; 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b=nxr2JUeAwGdcVu48oHZK/ucW8/wZVmgM0Bz6QW7NvtiT3mZQNA8jtM1vJ8A50481hY3TuHivUJaCJii82VfgiCjHaoyGjcovJRII9tbhv0De/WSmSmoYWfMDJM+62MUopHE5tZ8m4i6SHTRknsu5wpp1BABbiP8EhoZbKKuRSI8= Received: from MN2PR11MB4448.namprd11.prod.outlook.com (52.135.39.157) by MN2PR11MB4159.namprd11.prod.outlook.com (20.179.150.225) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.2451.27; Fri, 15 Nov 2019 13:49:09 +0000 Received: from MN2PR11MB4448.namprd11.prod.outlook.com ([fe80::84c:6e75:22df:cbc9]) by MN2PR11MB4448.namprd11.prod.outlook.com ([fe80::84c:6e75:22df:cbc9%5]) with mapi id 15.20.2451.027; Fri, 15 Nov 2019 13:49:09 +0000 From: To: CC: , , , , , , Subject: [PATCH 2/2] crypto: atmel-aes - Change data type for "lastc" buffer Thread-Topic: [PATCH 2/2] crypto: atmel-aes - Change data type for "lastc" buffer Thread-Index: AQHVm7t0zw6ysqDDnEebCGYj6j6T6A== Date: Fri, 15 Nov 2019 13:49:09 +0000 Message-ID: <20191115134854.30190-2-tudor.ambarus@microchip.com> References: <20191115134854.30190-1-tudor.ambarus@microchip.com> In-Reply-To: <20191115134854.30190-1-tudor.ambarus@microchip.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-clientproxiedby: BE0P281CA0017.DEUP281.PROD.OUTLOOK.COM (2603:10a6:b10:a::27) To MN2PR11MB4448.namprd11.prod.outlook.com (2603:10b6:208:193::29) x-ms-exchange-messagesentrepresentingtype: 1 x-mailer: git-send-email 2.9.5 x-originating-ip: [94.177.32.156] x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: 1c4c1684-9de8-4fe7-86bd-08d769d29697 x-ms-traffictypediagnostic: MN2PR11MB4159: x-ms-exchange-transport-forked: True x-microsoft-antispam-prvs: x-ms-oob-tlc-oobclassifiers: OLM:5516; x-forefront-prvs: 02229A4115 x-forefront-antispam-report: SFV:NSPM;SFS:(10009020)(136003)(346002)(366004)(39860400002)(396003)(376002)(199004)(189003)(14444005)(102836004)(66446008)(6916009)(14454004)(2351001)(26005)(50226002)(6116002)(36756003)(71200400001)(3846002)(52116002)(99286004)(25786009)(8936002)(5660300002)(71190400001)(6506007)(6436002)(386003)(8676002)(6486002)(107886003)(2501003)(11346002)(66476007)(66946007)(66556008)(4744005)(6512007)(478600001)(64756008)(5640700003)(76176011)(446003)(1730700003)(81156014)(81166006)(186003)(1076003)(7736002)(305945005)(316002)(2616005)(4326008)(54906003)(486006)(476003)(256004)(66066001)(2906002)(86362001);DIR:OUT;SFP:1101;SCL:1;SRVR:MN2PR11MB4159;H:MN2PR11MB4448.namprd11.prod.outlook.com;FPR:;SPF:None;LANG:en;PTR:InfoNoRecords;A:1;MX:1; received-spf: None (protection.outlook.com: microchip.com does not designate permitted sender hosts) x-ms-exchange-senderadcheck: 1 x-microsoft-antispam: BCL:0; x-microsoft-antispam-message-info: 9xp5wU2A+7radu9up5MoS63YQ+faqeERPZFe2A5iE/yAnzRNm+/yATSaHQeyB/FDPh8S/WqE6rIVVUxRFdIpYERJAiyv0y0hAY97OiT3u8y3aYhYSHoILTUHFyE3IS9Wqjyp1hbnKXwCw+P50HXSJq021IsTfv+J6CtVAmCs7wFNLOQVx7vHvzY31SSOQeigSfDJV+Lot8h+iFsTPYJPe0FotIYk11ne8kwrfEId9HlL37QDwiRiurN/uILmLuqimMRjFI7a0Y+EYgdkNz9nrqiSbSyCQDDoEBDdqbj32M1/27zu28iGS61bFdzRbD5DDr2Ey2VPkmhq653TmXkAmcvW37AFeOdIzgDLj3T6F73MgYR1f94S1Yijcgg7YNmB4dxS6VTZ1se78VgRpa3P3VPYrPpThHRcnrT8v0J7QTdojxrivtYYeF+c7hxTqfvX MIME-Version: 1.0 X-MS-Exchange-CrossTenant-Network-Message-Id: 1c4c1684-9de8-4fe7-86bd-08d769d29697 X-MS-Exchange-CrossTenant-originalarrivaltime: 15 Nov 2019 13:49:09.0303 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 3f4057f3-b418-4d4e-ba84-d55b4e897d88 X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: +AyJot5sSHg63/aroi/4RPt8cmpxEjz+5HmILDSVwrFLS5b7meUsWxNTgGs+iB8ZCaF3gZSue3zTb1GLB+sMaPWXBL5xZIIe9RkXWflPP/A= X-MS-Exchange-Transport-CrossTenantHeadersStamped: MN2PR11MB4159 Sender: linux-crypto-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-crypto@vger.kernel.org From: Tudor Ambarus In case of in-place decryption, the "lastc" buffer is used to copy the last ciphertext block before the decryption of the message. It is later used to update the req->iv of the skcipher_request. "lastc" variable is not used to interact with the hardware, there is no restriction to be of type "u32". Change the type of "lastc" to "u8". Signed-off-by: Tudor Ambarus --- drivers/crypto/atmel-aes.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/crypto/atmel-aes.c b/drivers/crypto/atmel-aes.c index 3c88c164c3dc..91092504bc96 100644 --- a/drivers/crypto/atmel-aes.c +++ b/drivers/crypto/atmel-aes.c @@ -155,7 +155,7 @@ struct atmel_aes_authenc_ctx { struct atmel_aes_reqctx { unsigned long mode; - u32 lastc[AES_BLOCK_SIZE / sizeof(u32)]; + u8 lastc[AES_BLOCK_SIZE]; }; #if IS_ENABLED(CONFIG_CRYPTO_DEV_ATMEL_AUTHENC)