Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933289AbbLHILH (ORCPT ); Tue, 8 Dec 2015 03:11:07 -0500 Received: from mail-wm0-f53.google.com ([74.125.82.53]:38138 "EHLO mail-wm0-f53.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933225AbbLHILD (ORCPT ); Tue, 8 Dec 2015 03:11:03 -0500 From: LABBE Corentin To: davem@davemloft.net, herbert@gondor.apana.org.au, thomas.lendacky@amd.com Cc: LABBE Corentin , linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v2 3/4] crypto: ccp: Use precalculated hash from headers Date: Tue, 8 Dec 2015 09:10:52 +0100 Message-Id: <1449562253-13846-4-git-send-email-clabbe.montjoie@gmail.com> X-Mailer: git-send-email 2.4.10 In-Reply-To: <1449562253-13846-1-git-send-email-clabbe.montjoie@gmail.com> References: <1449562253-13846-1-git-send-email-clabbe.montjoie@gmail.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3013 Lines: 82 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 | 39 ++++++++------------------------------- 1 file changed, 8 insertions(+), 31 deletions(-) diff --git a/drivers/crypto/ccp/ccp-ops.c b/drivers/crypto/ccp/ccp-ops.c index c6e883b..6613aee 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); @@ -1391,18 +1365,21 @@ 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; -- 2.4.10 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/