From patchwork Mon Oct 12 16:53:41 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Corentin Labbe X-Patchwork-Id: 7377881 X-Patchwork-Delegate: herbert@gondor.apana.org.au Return-Path: X-Original-To: patchwork-linux-crypto@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 9C25F9F1D5 for ; Mon, 12 Oct 2015 16:56:36 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id B2E87208C4 for ; Mon, 12 Oct 2015 16:56:35 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id BB07C208AF for ; Mon, 12 Oct 2015 16:56:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751980AbbJLQyW (ORCPT ); Mon, 12 Oct 2015 12:54:22 -0400 Received: from mail-wi0-f175.google.com ([209.85.212.175]:33358 "EHLO mail-wi0-f175.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751902AbbJLQyT (ORCPT ); Mon, 12 Oct 2015 12:54:19 -0400 Received: by wicge5 with SMTP id ge5so25408695wic.0; Mon, 12 Oct 2015 09:54:18 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=JWnvTBQ4mt72GMoMtRbYYy/X0JjceE/DnPiXx5PsTLM=; b=aFai0PRfmEcAJTIHHEEIvuXj1SDoHu5DHgmf1mAPXpD4BHfP43p/IL1XlCGluwyXVx PQH6G7zf7vclbr6ifCAD2/tMyiWc9dTwJ8abjDTDjFdONn1qoGHUwrWzhL+LOoSxEWeQ NKTQFC4ZsbrhVzslXBwmOmRoF0zId1BKrnEkmU+gnkISfg7c6Oawu8UqjkOcwGrEAN1h HS4Kq6B7PfAREhpDP92Z3xEavpPug6Q4qKEMH0lO938cpDjvFpDprp1hQH4XuNcwzluS RwVHsRsiFeyK+6djHmRL61ReYs8wFpGRhFo3t6nK6UAW/sgiKgUqvFYJx9uliF8bT/wF XlDw== X-Received: by 10.180.8.132 with SMTP id r4mr16827065wia.70.1444668857920; Mon, 12 Oct 2015 09:54:17 -0700 (PDT) Received: from Red.local (ANice-651-1-429-185.w83-201.abo.wanadoo.fr. [83.201.253.185]) by smtp.googlemail.com with ESMTPSA id s16sm11548506wik.16.2015.10.12.09.54.16 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Mon, 12 Oct 2015 09:54:17 -0700 (PDT) From: LABBE Corentin To: herbert@gondor.apana.org.au, davem@davemloft.net, thomas.lendacky@amd.com, geert+renesas@glider.be, ulf.hansson@linaro.org, wsa@the-dreams.de, keescook@chromium.org, maxime.ripard@free-electrons.com Cc: linux-kernel@vger.kernel.org, linux-crypto@vger.kernel.org, LABBE Corentin Subject: [PATCH 3/8] crypto: ccp: Use precalculated hash from headers Date: Mon, 12 Oct 2015 18:53:41 +0200 Message-Id: <1444668826-6531-4-git-send-email-clabbe.montjoie@gmail.com> X-Mailer: git-send-email 2.4.9 In-Reply-To: <1444668826-6531-1-git-send-email-clabbe.montjoie@gmail.com> References: <1444668826-6531-1-git-send-email-clabbe.montjoie@gmail.com> Sender: linux-crypto-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-crypto@vger.kernel.org X-Spam-Status: No, score=-6.8 required=5.0 tests=BAYES_00, DKIM_ADSP_CUSTOM_MED, DKIM_SIGNED, FREEMAIL_FROM, RCVD_IN_DNSWL_HI, T_DKIM_INVALID, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Precalculated hash for empty message are now present in hash headers. This patch just use them. Signed-off-by: LABBE Corentin Tested-by: Tom Lendacky Acked-by: Tom Lendacky --- drivers/crypto/ccp/ccp-ops.c | 40 ++++++++-------------------------------- 1 file changed, 8 insertions(+), 32 deletions(-) diff --git a/drivers/crypto/ccp/ccp-ops.c b/drivers/crypto/ccp/ccp-ops.c index d09c6c4..3002b418 100644 --- a/drivers/crypto/ccp/ccp-ops.c +++ b/drivers/crypto/ccp/ccp-ops.c @@ -152,32 +152,6 @@ static const __be32 ccp_sha256_init[CCP_SHA_CTXSIZE / sizeof(__be32)] = { cpu_to_be32(SHA256_H6), cpu_to_be32(SHA256_H7), }; -/* The CCP cannot perform zero-length sha operations so the caller - * is required to buffer data for the final operation. However, a - * sha operation for a message with a total length of zero is valid - * so known values are required to supply the result. - */ -static const u8 ccp_sha1_zero[CCP_SHA_CTXSIZE] = { - 0xda, 0x39, 0xa3, 0xee, 0x5e, 0x6b, 0x4b, 0x0d, - 0x32, 0x55, 0xbf, 0xef, 0x95, 0x60, 0x18, 0x90, - 0xaf, 0xd8, 0x07, 0x09, 0x00, 0x00, 0x00, 0x00, - 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, -}; - -static const u8 ccp_sha224_zero[CCP_SHA_CTXSIZE] = { - 0xd1, 0x4a, 0x02, 0x8c, 0x2a, 0x3a, 0x2b, 0xc9, - 0x47, 0x61, 0x02, 0xbb, 0x28, 0x82, 0x34, 0xc4, - 0x15, 0xa2, 0xb0, 0x1f, 0x82, 0x8e, 0xa6, 0x2a, - 0xc5, 0xb3, 0xe4, 0x2f, 0x00, 0x00, 0x00, 0x00, -}; - -static const u8 ccp_sha256_zero[CCP_SHA_CTXSIZE] = { - 0xe3, 0xb0, 0xc4, 0x42, 0x98, 0xfc, 0x1c, 0x14, - 0x9a, 0xfb, 0xf4, 0xc8, 0x99, 0x6f, 0xb9, 0x24, - 0x27, 0xae, 0x41, 0xe4, 0x64, 0x9b, 0x93, 0x4c, - 0xa4, 0x95, 0x99, 0x1b, 0x78, 0x52, 0xb8, 0x55, -}; - static u32 ccp_addr_lo(struct ccp_dma_info *info) { return lower_32_bits(info->address + info->offset); @@ -1388,18 +1362,20 @@ static int ccp_run_sha_cmd(struct ccp_cmd_queue *cmd_q, struct ccp_cmd *cmd) if (sha->msg_bits) return -EINVAL; - /* A sha operation for a message with a total length of zero, - * return known result. - */ +/* The CCP cannot perform zero-length sha operations so the caller + * is required to buffer data for the final operation. However, a + * sha operation for a message with a total length of zero is valid + * so known values are required to supply the result. + */ switch (sha->type) { case CCP_SHA_TYPE_1: - sha_zero = ccp_sha1_zero; + sha_zero = sha1_zero_message_hash; break; case CCP_SHA_TYPE_224: - sha_zero = ccp_sha224_zero; + sha_zero = sha224_zero_message_hash; break; case CCP_SHA_TYPE_256: - sha_zero = ccp_sha256_zero; + sha_zero = sha256_zero_message_hash; break; default: return -EINVAL;