From patchwork Tue Jul 30 12:38:33 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hans de Goede X-Patchwork-Id: 11065707 X-Patchwork-Delegate: herbert@gondor.apana.org.au Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id D03011395 for ; Tue, 30 Jul 2019 12:38:41 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id BF2ED23B24 for ; Tue, 30 Jul 2019 12:38:41 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id B39B328770; Tue, 30 Jul 2019 12:38:41 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 3C14A23B24 for ; Tue, 30 Jul 2019 12:38:41 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729503AbfG3Mik (ORCPT ); Tue, 30 Jul 2019 08:38:40 -0400 Received: from mx1.redhat.com ([209.132.183.28]:41874 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728980AbfG3Mik (ORCPT ); Tue, 30 Jul 2019 08:38:40 -0400 Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.phx2.redhat.com [10.5.11.15]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id BCE2A81DF1; Tue, 30 Jul 2019 12:38:39 +0000 (UTC) Received: from shalem.localdomain.com (unknown [10.36.118.84]) by smtp.corp.redhat.com (Postfix) with ESMTP id 742425D6B2; Tue, 30 Jul 2019 12:38:38 +0000 (UTC) From: Hans de Goede To: Herbert Xu , "David S . Miller" Cc: Hans de Goede , Andy Lutomirski , linux-crypto@vger.kernel.org, Ard Biesheuvel Subject: [RFC 1/3] crypto/sha256: Factor out the parts of base API that don't use shash_desc Date: Tue, 30 Jul 2019 14:38:33 +0200 Message-Id: <20190730123835.10283-2-hdegoede@redhat.com> In-Reply-To: <20190730123835.10283-1-hdegoede@redhat.com> References: <20190730123835.10283-1-hdegoede@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.15 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.25]); Tue, 30 Jul 2019 12:38:39 +0000 (UTC) Sender: linux-crypto-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-crypto@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Andy Lutomirski I want to expose a minimal SHA256 API that can be used without the depending on the crypto core. To prepare for this, factor out the meat of the sha256_base_*() helpers. Cc: Ard Biesheuvel Cc: Herbert Xu Signed-off-by: Andy Lutomirski --- include/crypto/sha256_base.h | 53 ++++++++++++++++++++++++------------ 1 file changed, 36 insertions(+), 17 deletions(-) diff --git a/include/crypto/sha256_base.h b/include/crypto/sha256_base.h index 59159bc944f5..5317946a813a 100644 --- a/include/crypto/sha256_base.h +++ b/include/crypto/sha256_base.h @@ -15,10 +15,8 @@ typedef void (sha256_block_fn)(struct sha256_state *sst, u8 const *src, int blocks); -static inline int sha224_base_init(struct shash_desc *desc) +static inline void sha224_init_direct(struct sha256_state *sctx) { - struct sha256_state *sctx = shash_desc_ctx(desc); - sctx->state[0] = SHA224_H0; sctx->state[1] = SHA224_H1; sctx->state[2] = SHA224_H2; @@ -28,14 +26,16 @@ static inline int sha224_base_init(struct shash_desc *desc) sctx->state[6] = SHA224_H6; sctx->state[7] = SHA224_H7; sctx->count = 0; +} +static inline int sha224_base_init(struct shash_desc *desc) +{ + sha224_init_direct(shash_desc_ctx(desc)); return 0; } -static inline int sha256_base_init(struct shash_desc *desc) +static inline void sha256_init_direct(struct sha256_state *sctx) { - struct sha256_state *sctx = shash_desc_ctx(desc); - sctx->state[0] = SHA256_H0; sctx->state[1] = SHA256_H1; sctx->state[2] = SHA256_H2; @@ -45,16 +45,19 @@ static inline int sha256_base_init(struct shash_desc *desc) sctx->state[6] = SHA256_H6; sctx->state[7] = SHA256_H7; sctx->count = 0; +} +static inline int sha256_base_init(struct shash_desc *desc) +{ + sha256_init_direct(shash_desc_ctx(desc)); return 0; } -static inline int sha256_base_do_update(struct shash_desc *desc, - const u8 *data, - unsigned int len, - sha256_block_fn *block_fn) +static inline void __sha256_base_do_update(struct sha256_state *sctx, + const u8 *data, + unsigned int len, + sha256_block_fn *block_fn) { - struct sha256_state *sctx = shash_desc_ctx(desc); unsigned int partial = sctx->count % SHA256_BLOCK_SIZE; sctx->count += len; @@ -83,15 +86,21 @@ static inline int sha256_base_do_update(struct shash_desc *desc, } if (len) memcpy(sctx->buf + partial, data, len); +} +static inline int sha256_base_do_update(struct shash_desc *desc, + const u8 *data, + unsigned int len, + sha256_block_fn *block_fn) +{ + __sha256_base_do_update(shash_desc_ctx(desc), data, len, block_fn); return 0; } -static inline int sha256_base_do_finalize(struct shash_desc *desc, - sha256_block_fn *block_fn) +static inline void sha256_do_finalize_direct(struct sha256_state *sctx, + sha256_block_fn *block_fn) { const int bit_offset = SHA256_BLOCK_SIZE - sizeof(__be64); - struct sha256_state *sctx = shash_desc_ctx(desc); __be64 *bits = (__be64 *)(sctx->buf + bit_offset); unsigned int partial = sctx->count % SHA256_BLOCK_SIZE; @@ -106,14 +115,18 @@ static inline int sha256_base_do_finalize(struct shash_desc *desc, memset(sctx->buf + partial, 0x0, bit_offset - partial); *bits = cpu_to_be64(sctx->count << 3); block_fn(sctx, sctx->buf, 1); +} +static inline int sha256_base_do_finalize(struct shash_desc *desc, + sha256_block_fn *block_fn) +{ + sha256_do_finalize_direct(shash_desc_ctx(desc), block_fn); return 0; } -static inline int sha256_base_finish(struct shash_desc *desc, u8 *out) +static inline void __sha256_base_finish(struct sha256_state *sctx, + unsigned int digest_size, u8 *out) { - unsigned int digest_size = crypto_shash_digestsize(desc->tfm); - struct sha256_state *sctx = shash_desc_ctx(desc); __be32 *digest = (__be32 *)out; int i; @@ -121,5 +134,11 @@ static inline int sha256_base_finish(struct shash_desc *desc, u8 *out) put_unaligned_be32(sctx->state[i], digest++); *sctx = (struct sha256_state){}; +} + +static inline int sha256_base_finish(struct shash_desc *desc, u8 *out) +{ + __sha256_base_finish(shash_desc_ctx(desc), + crypto_shash_digestsize(desc->tfm), out); return 0; }