From patchwork Mon Jun 29 17:16:20 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Giovanni Cabiddu X-Patchwork-Id: 197564 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-10.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id E0B70C433E3 for ; Mon, 29 Jun 2020 19:41:40 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C99B7207F9 for ; Mon, 29 Jun 2020 19:41:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728107AbgF2Tlj (ORCPT ); Mon, 29 Jun 2020 15:41:39 -0400 Received: from mga07.intel.com ([134.134.136.100]:58002 "EHLO mga07.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2387855AbgF2Tkt (ORCPT ); Mon, 29 Jun 2020 15:40:49 -0400 IronPort-SDR: 2O5etOzmuVoO9ICmNkVKwaiP6OKZo7cSlU1msHCnkW8shNV16+hj8TORJdZQEbeoeLaB04pZjm JGGHZhfB1m2w== X-IronPort-AV: E=McAfee;i="6000,8403,9666"; a="211091703" X-IronPort-AV: E=Sophos;i="5.75,295,1589266800"; d="scan'208";a="211091703" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga007.fm.intel.com ([10.253.24.52]) by orsmga105.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 29 Jun 2020 10:16:40 -0700 IronPort-SDR: WMiSeiuHUgZeFbfW0+caOsOqokkegT4puWofXHvZQ3X0jXi9qNUqZ6t6EJ7HGRJRwlA7pmOSpu +1XGqEBG9hxQ== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.75,295,1589266800"; d="scan'208";a="264891348" Received: from silpixa00400314.ir.intel.com (HELO silpixa00400314.ger.corp.intel.com) ([10.237.222.51]) by fmsmga007.fm.intel.com with ESMTP; 29 Jun 2020 10:16:39 -0700 From: Giovanni Cabiddu To: herbert@gondor.apana.org.au Cc: linux-crypto@vger.kernel.org, qat-linux@intel.com, Giovanni Cabiddu Subject: [PATCH v3 4/4] crypto: qat - fallback for xts with 192 bit keys Date: Mon, 29 Jun 2020 18:16:20 +0100 Message-Id: <20200629171620.2989-5-giovanni.cabiddu@intel.com> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20200629171620.2989-1-giovanni.cabiddu@intel.com> References: <20200629171620.2989-1-giovanni.cabiddu@intel.com> MIME-Version: 1.0 Sender: linux-crypto-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-crypto@vger.kernel.org Forward requests to another provider if the key length for AES-XTS is 192 bits as this is not supported by the QAT accelerators. This fixes the following issue reported with the option CONFIG_CRYPTO_MANAGER_EXTRA_TESTS: alg: skcipher: qat_aes_xts setkey failed on test vector "random: len=3204 klen=48"; expected_error=0, actual_error=-22, flags=0x1 Signed-off-by: Giovanni Cabiddu --- drivers/crypto/qat/qat_common/qat_algs.c | 68 ++++++++++++++++++++++-- 1 file changed, 65 insertions(+), 3 deletions(-) diff --git a/drivers/crypto/qat/qat_common/qat_algs.c b/drivers/crypto/qat/qat_common/qat_algs.c index 77bdff0118f7..2a353e249e1c 100644 --- a/drivers/crypto/qat/qat_common/qat_algs.c +++ b/drivers/crypto/qat/qat_common/qat_algs.c @@ -88,6 +88,8 @@ struct qat_alg_skcipher_ctx { struct icp_qat_fw_la_bulk_req enc_fw_req; struct icp_qat_fw_la_bulk_req dec_fw_req; struct qat_crypto_instance *inst; + struct crypto_skcipher *ftfm; + bool fallback; }; static int qat_get_inter_state_size(enum icp_qat_hw_auth_algo qat_hash_alg) @@ -994,12 +996,25 @@ static int qat_alg_skcipher_ctr_setkey(struct crypto_skcipher *tfm, static int qat_alg_skcipher_xts_setkey(struct crypto_skcipher *tfm, const u8 *key, unsigned int keylen) { + struct qat_alg_skcipher_ctx *ctx = crypto_skcipher_ctx(tfm); int ret; ret = xts_verify_key(tfm, key, keylen); if (ret) return ret; + if (keylen >> 1 == AES_KEYSIZE_192) { + ret = crypto_skcipher_setkey(ctx->ftfm, key, keylen); + if (ret) + return ret; + + ctx->fallback = true; + + return 0; + } + + ctx->fallback = false; + return qat_alg_skcipher_setkey(tfm, key, keylen, ICP_QAT_HW_CIPHER_XTS_MODE); } @@ -1066,9 +1081,19 @@ static int qat_alg_skcipher_blk_encrypt(struct skcipher_request *req) static int qat_alg_skcipher_xts_encrypt(struct skcipher_request *req) { + struct crypto_skcipher *stfm = crypto_skcipher_reqtfm(req); + struct qat_alg_skcipher_ctx *ctx = crypto_skcipher_ctx(stfm); + struct skcipher_request *nreq = skcipher_request_ctx(req); + if (req->cryptlen < XTS_BLOCK_SIZE) return -EINVAL; + if (ctx->fallback) { + memcpy(nreq, req, sizeof(*req)); + skcipher_request_set_tfm(nreq, ctx->ftfm); + return crypto_skcipher_encrypt(nreq); + } + return qat_alg_skcipher_encrypt(req); } @@ -1134,9 +1159,19 @@ static int qat_alg_skcipher_blk_decrypt(struct skcipher_request *req) static int qat_alg_skcipher_xts_decrypt(struct skcipher_request *req) { + struct crypto_skcipher *stfm = crypto_skcipher_reqtfm(req); + struct qat_alg_skcipher_ctx *ctx = crypto_skcipher_ctx(stfm); + struct skcipher_request *nreq = skcipher_request_ctx(req); + if (req->cryptlen < XTS_BLOCK_SIZE) return -EINVAL; + if (ctx->fallback) { + memcpy(nreq, req, sizeof(*req)); + skcipher_request_set_tfm(nreq, ctx->ftfm); + return crypto_skcipher_decrypt(nreq); + } + return qat_alg_skcipher_decrypt(req); } @@ -1200,6 +1235,24 @@ static int qat_alg_skcipher_init_tfm(struct crypto_skcipher *tfm) return 0; } +static int qat_alg_skcipher_init_xts_tfm(struct crypto_skcipher *tfm) +{ + struct qat_alg_skcipher_ctx *ctx = crypto_skcipher_ctx(tfm); + int reqsize; + + ctx->ftfm = crypto_alloc_skcipher("xts(aes)", 0, + CRYPTO_ALG_NEED_FALLBACK); + if (IS_ERR(ctx->ftfm)) + return PTR_ERR(ctx->ftfm); + + reqsize = max(sizeof(struct qat_crypto_request), + sizeof(struct skcipher_request) + + crypto_skcipher_reqsize(ctx->ftfm)); + crypto_skcipher_set_reqsize(tfm, reqsize); + + return 0; +} + static void qat_alg_skcipher_exit_tfm(struct crypto_skcipher *tfm) { struct qat_alg_skcipher_ctx *ctx = crypto_skcipher_ctx(tfm); @@ -1227,6 +1280,15 @@ static void qat_alg_skcipher_exit_tfm(struct crypto_skcipher *tfm) qat_crypto_put_instance(inst); } +static void qat_alg_skcipher_exit_xts_tfm(struct crypto_skcipher *tfm) +{ + struct qat_alg_skcipher_ctx *ctx = crypto_skcipher_ctx(tfm); + + if (ctx->ftfm) + crypto_free_skcipher(ctx->ftfm); + + qat_alg_skcipher_exit_tfm(tfm); +} static struct aead_alg qat_aeads[] = { { .base = { @@ -1321,14 +1383,14 @@ static struct skcipher_alg qat_skciphers[] = { { .base.cra_name = "xts(aes)", .base.cra_driver_name = "qat_aes_xts", .base.cra_priority = 4001, - .base.cra_flags = CRYPTO_ALG_ASYNC, + .base.cra_flags = CRYPTO_ALG_ASYNC | CRYPTO_ALG_NEED_FALLBACK, .base.cra_blocksize = AES_BLOCK_SIZE, .base.cra_ctxsize = sizeof(struct qat_alg_skcipher_ctx), .base.cra_alignmask = 0, .base.cra_module = THIS_MODULE, - .init = qat_alg_skcipher_init_tfm, - .exit = qat_alg_skcipher_exit_tfm, + .init = qat_alg_skcipher_init_xts_tfm, + .exit = qat_alg_skcipher_exit_xts_tfm, .setkey = qat_alg_skcipher_xts_setkey, .decrypt = qat_alg_skcipher_xts_decrypt, .encrypt = qat_alg_skcipher_xts_encrypt,