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[209.132.180.67]) by mx.google.com with ESMTP id h4si2547968pdj.248.2015.04.07.01.52.28 for ; Tue, 07 Apr 2015 01:52:30 -0700 (PDT) Received-SPF: none (google.com: linux-crypto-owner@vger.kernel.org does not designate permitted sender hosts) client-ip=209.132.180.67; Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751504AbbDGIw1 (ORCPT ); Tue, 7 Apr 2015 04:52:27 -0400 Received: from mail-wg0-f43.google.com ([74.125.82.43]:35979 "EHLO mail-wg0-f43.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751242AbbDGIwZ (ORCPT ); Tue, 7 Apr 2015 04:52:25 -0400 Received: by wgsk9 with SMTP id k9so26069471wgs.3 for ; Tue, 07 Apr 2015 01:52:24 -0700 (PDT) X-Received: by 10.180.101.65 with SMTP id fe1mr2599279wib.22.1428396744695; Tue, 07 Apr 2015 01:52:24 -0700 (PDT) Received: from ards-macbook-pro.local ([90.174.4.191]) by mx.google.com with ESMTPSA id q10sm9935641wjr.41.2015.04.07.01.52.22 (version=TLSv1.1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Tue, 07 Apr 2015 01:52:23 -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 v3 01/16] crypto: sha1: implement base layer for SHA-1 Date: Tue, 7 Apr 2015 10:51:49 +0200 Message-Id: <1428396724-19962-2-git-send-email-ard.biesheuvel@linaro.org> X-Mailer: git-send-email 1.8.3.2 In-Reply-To: <1428396724-19962-1-git-send-email-ard.biesheuvel@linaro.org> References: <1428396724-19962-1-git-send-email-ard.biesheuvel@linaro.org> Sender: linux-crypto-owner@vger.kernel.org Precedence: list List-ID: X-Mailing-List: linux-crypto@vger.kernel.org X-Removed-Original-Auth: Dkim didn't pass. X-Original-Sender: ard.biesheuvel@linaro.org X-Original-Authentication-Results: mx.google.com; spf=pass (google.com: domain of patch+caf_=patchwork-forward=linaro.org@linaro.org designates 209.85.217.176 as permitted sender) smtp.mail=patch+caf_=patchwork-forward=linaro.org@linaro.org Mailing-list: list patchwork-forward@linaro.org; contact patchwork-forward+owners@linaro.org X-Google-Group-Id: 836684582541 List-Post: , List-Help: , List-Archive: List-Unsubscribe: , To reduce the number of copies of boilerplate code throughout the tree, this patch implements generic glue for the SHA-1 algorithm. This allows a specific arch or hardware implementation to only implement the special handling that it needs. Signed-off-by: Ard Biesheuvel --- include/crypto/sha1_base.h | 123 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 123 insertions(+) create mode 100644 include/crypto/sha1_base.h diff --git a/include/crypto/sha1_base.h b/include/crypto/sha1_base.h new file mode 100644 index 000000000000..919db0920203 --- /dev/null +++ b/include/crypto/sha1_base.h @@ -0,0 +1,123 @@ +/* + * sha1_base.h - core logic for SHA-1 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 (sha1_block_fn)(int blocks, u8 const *src, u32 *state, + const u8 *head, void *p); + +static inline int sha1_base_init(struct shash_desc *desc) +{ + struct sha1_state *sctx = shash_desc_ctx(desc); + + sctx->state[0] = SHA1_H0; + sctx->state[1] = SHA1_H1; + sctx->state[2] = SHA1_H2; + sctx->state[3] = SHA1_H3; + sctx->state[4] = SHA1_H4; + sctx->count = 0; + + return 0; +} + +static inline int sha1_base_export(struct shash_desc *desc, void *out) +{ + struct sha1_state *sctx = shash_desc_ctx(desc); + struct sha1_state *dst = out; + + *dst = *sctx; + + return 0; +} + +static inline int sha1_base_import(struct shash_desc *desc, const void *in) +{ + struct sha1_state *sctx = shash_desc_ctx(desc); + struct sha1_state const *src = in; + + *sctx = *src; + + return 0; +} + +static inline int sha1_base_do_update(struct shash_desc *desc, const u8 *data, + unsigned int len, sha1_block_fn *block_fn, + void *p) +{ + struct sha1_state *sctx = shash_desc_ctx(desc); + unsigned int partial = sctx->count % SHA1_BLOCK_SIZE; + + sctx->count += len; + + if (unlikely((partial + len) >= SHA1_BLOCK_SIZE)) { + int blocks; + + if (partial) { + int p = SHA1_BLOCK_SIZE - partial; + + memcpy(sctx->buffer + partial, data, p); + data += p; + len -= p; + } + + blocks = len / SHA1_BLOCK_SIZE; + len %= SHA1_BLOCK_SIZE; + + block_fn(blocks, data, sctx->state, + partial ? sctx->buffer : NULL, p); + data += blocks * SHA1_BLOCK_SIZE; + partial = 0; + } + if (len) + memcpy(sctx->buffer + partial, data, len); + + return 0; +} + +static inline int sha1_base_do_finalize(struct shash_desc *desc, + sha1_block_fn *block_fn, void *p) +{ + const int bit_offset = SHA1_BLOCK_SIZE - sizeof(__be64); + struct sha1_state *sctx = shash_desc_ctx(desc); + __be64 *bits = (__be64 *)(sctx->buffer + bit_offset); + unsigned int partial = sctx->count % SHA1_BLOCK_SIZE; + + sctx->buffer[partial++] = 0x80; + if (partial > bit_offset) { + memset(sctx->buffer + partial, 0x0, SHA1_BLOCK_SIZE - partial); + partial = 0; + + block_fn(1, sctx->buffer, sctx->state, NULL, p); + } + + memset(sctx->buffer + partial, 0x0, bit_offset - partial); + *bits = cpu_to_be64(sctx->count << 3); + block_fn(1, sctx->buffer, sctx->state, NULL, p); + + return 0; +} + +static inline int sha1_base_finish(struct shash_desc *desc, u8 *out) +{ + struct sha1_state *sctx = shash_desc_ctx(desc); + __be32 *digest = (__be32 *)out; + int i; + + for (i = 0; i < SHA1_DIGEST_SIZE / sizeof(__be32); i++) + put_unaligned_be32(sctx->state[i], digest++); + + *sctx = (struct sha1_state){}; + return 0; +}