From patchwork Thu Apr 9 10:55:35 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ard Biesheuvel X-Patchwork-Id: 6187221 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 C148D9F2EC for ; Thu, 9 Apr 2015 10:56:17 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id BFBA7203B0 for ; Thu, 9 Apr 2015 10:56:16 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 042A720396 for ; Thu, 9 Apr 2015 10:56:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751914AbbDIK4N (ORCPT ); Thu, 9 Apr 2015 06:56:13 -0400 Received: from mail-wi0-f179.google.com ([209.85.212.179]:35539 "EHLO mail-wi0-f179.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933258AbbDIK4M (ORCPT ); Thu, 9 Apr 2015 06:56:12 -0400 Received: by widdi4 with SMTP id di4so87412693wid.0 for ; Thu, 09 Apr 2015 03:56:11 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=Mh8mNSAIXCgICTiQxDIzt+Pw8kAaQf98O19QmTa9izk=; b=cYyJKov1VwGTd8SxlGPdgS9Q917NaCMnS/I54eSYBmJYiCZ/z0tbSmmK9P3yetiHXH T+bJ2TzqN9ht+97Zu/VQ+9Xmx2N+AtkxTXqpvOlIg4od6z3rv4eVwnWGEgAY3RKPGvZF jENidj9Q2gkDmMIA8KFwdFVtxYM3vEPb/rQaGov8BUZSExtXsaFLrq7TqEFkHs66wbg7 kqDamG1QAby5GjZ27OELtbeGqXblTkLBC1mrSeiJZKIYtJDwdBSDuabwBDwDRm1q6KaY zy0rwn2hWla40ADG9cFx3WvVslVpbVfmPgxUxH8yE09++aKAA5tqiVMZLfUMeDd+/Ky6 h46w== X-Gm-Message-State: ALoCoQnV5gne/Ec25wmQTdRD9iU8+0c6j43Hnai4zoZL97fTe2sq57ZDBeBk4lI+tySNJTeDiYaM X-Received: by 10.194.62.52 with SMTP id v20mr59542928wjr.137.1428576971395; Thu, 09 Apr 2015 03:56:11 -0700 (PDT) Received: from ards-macbook-pro.local ([90.174.5.113]) by mx.google.com with ESMTPSA id b10sm2192186wiz.9.2015.04.09.03.56.09 (version=TLSv1.1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Thu, 09 Apr 2015 03:56:10 -0700 (PDT) From: Ard Biesheuvel To: linux-crypto@vger.kernel.org, linux-arm-kernel@lists.infradead.org, x86@kernel.org, herbert@gondor.apana.org.au, samitolvanen@google.com, jussi.kivilinna@iki.fi Cc: stockhausen@collogia.de, Ard Biesheuvel Subject: [PATCH v4 03/16] crypto: sha512: implement base layer for SHA-512 Date: Thu, 9 Apr 2015 12:55:35 +0200 Message-Id: <1428576948-23863-4-git-send-email-ard.biesheuvel@linaro.org> X-Mailer: git-send-email 1.8.3.2 In-Reply-To: <1428576948-23863-1-git-send-email-ard.biesheuvel@linaro.org> References: <1428576948-23863-1-git-send-email-ard.biesheuvel@linaro.org> Sender: linux-crypto-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-crypto@vger.kernel.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, 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 To reduce the number of copies of boilerplate code throughout the tree, this patch implements generic glue for the SHA-512 algorithm. This allows a specific arch or hardware implementation to only implement the special handling that it needs. The users need to supply an implementation of void (sha512_block_fn)(struct sha512_state *sst, u8 const *src, int blocks) and pass it to the SHA-512 base functions. For easy casting between the prototype above and existing block functions that take a 'u64 state[]' as their first argument, the 'state' member of struct sha512_state is moved to the base of the struct. Signed-off-by: Ard Biesheuvel --- include/crypto/sha.h | 2 +- include/crypto/sha512_base.h | 131 +++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 132 insertions(+), 1 deletion(-) create mode 100644 include/crypto/sha512_base.h diff --git a/include/crypto/sha.h b/include/crypto/sha.h index a75bc80cc776..05e82cbc4d8f 100644 --- a/include/crypto/sha.h +++ b/include/crypto/sha.h @@ -77,8 +77,8 @@ struct sha256_state { }; struct sha512_state { - u64 count[2]; u64 state[SHA512_DIGEST_SIZE / 8]; + u64 count[2]; u8 buf[SHA512_BLOCK_SIZE]; }; diff --git a/include/crypto/sha512_base.h b/include/crypto/sha512_base.h new file mode 100644 index 000000000000..6c5341e005ea --- /dev/null +++ b/include/crypto/sha512_base.h @@ -0,0 +1,131 @@ +/* + * sha512_base.h - core logic for SHA-512 implementations + * + * Copyright (C) 2015 Linaro Ltd + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include +#include +#include +#include + +#include + +typedef void (sha512_block_fn)(struct sha512_state *sst, u8 const *src, + int blocks); + +static inline int sha384_base_init(struct shash_desc *desc) +{ + struct sha512_state *sctx = shash_desc_ctx(desc); + + sctx->state[0] = SHA384_H0; + sctx->state[1] = SHA384_H1; + sctx->state[2] = SHA384_H2; + sctx->state[3] = SHA384_H3; + sctx->state[4] = SHA384_H4; + sctx->state[5] = SHA384_H5; + sctx->state[6] = SHA384_H6; + sctx->state[7] = SHA384_H7; + sctx->count[0] = sctx->count[1] = 0; + + return 0; +} + +static inline int sha512_base_init(struct shash_desc *desc) +{ + struct sha512_state *sctx = shash_desc_ctx(desc); + + sctx->state[0] = SHA512_H0; + sctx->state[1] = SHA512_H1; + sctx->state[2] = SHA512_H2; + sctx->state[3] = SHA512_H3; + sctx->state[4] = SHA512_H4; + sctx->state[5] = SHA512_H5; + sctx->state[6] = SHA512_H6; + sctx->state[7] = SHA512_H7; + sctx->count[0] = sctx->count[1] = 0; + + return 0; +} + +static inline int sha512_base_do_update(struct shash_desc *desc, + const u8 *data, + unsigned int len, + sha512_block_fn *block_fn) +{ + struct sha512_state *sctx = shash_desc_ctx(desc); + unsigned int partial = sctx->count[0] % SHA512_BLOCK_SIZE; + + sctx->count[0] += len; + if (sctx->count[0] < len) + sctx->count[1]++; + + if (unlikely((partial + len) >= SHA512_BLOCK_SIZE)) { + int blocks; + + if (partial) { + int p = SHA512_BLOCK_SIZE - partial; + + memcpy(sctx->buf + partial, data, p); + data += p; + len -= p; + + block_fn(sctx, sctx->buf, 1); + } + + blocks = len / SHA512_BLOCK_SIZE; + len %= SHA512_BLOCK_SIZE; + + if (blocks) { + block_fn(sctx, data, blocks); + data += blocks * SHA512_BLOCK_SIZE; + } + partial = 0; + } + if (len) + memcpy(sctx->buf + partial, data, len); + + return 0; +} + +static inline int sha512_base_do_finalize(struct shash_desc *desc, + sha512_block_fn *block_fn) +{ + const int bit_offset = SHA512_BLOCK_SIZE - sizeof(__be64[2]); + struct sha512_state *sctx = shash_desc_ctx(desc); + __be64 *bits = (__be64 *)(sctx->buf + bit_offset); + unsigned int partial = sctx->count[0] % SHA512_BLOCK_SIZE; + + sctx->buf[partial++] = 0x80; + if (partial > bit_offset) { + memset(sctx->buf + partial, 0x0, SHA512_BLOCK_SIZE - partial); + partial = 0; + + block_fn(sctx, sctx->buf, 1); + } + + memset(sctx->buf + partial, 0x0, bit_offset - partial); + bits[0] = cpu_to_be64(sctx->count[1] << 3 | sctx->count[0] >> 61); + bits[1] = cpu_to_be64(sctx->count[0] << 3); + block_fn(sctx, sctx->buf, 1); + + return 0; +} + +static inline int sha512_base_finish(struct shash_desc *desc, u8 *out) +{ + unsigned int digest_size = crypto_shash_digestsize(desc->tfm); + struct sha512_state *sctx = shash_desc_ctx(desc); + __be64 *digest = (__be64 *)out; + int i; + + for (i = 0; digest_size > 0; i++, digest_size -= sizeof(__be64)) + put_unaligned_be64(sctx->state[i], digest++); + + *sctx = (struct sha512_state){}; + return 0; +}