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[92.90.20.129]) by mx.google.com with ESMTPSA id jt8sm15507705wid.4.2015.03.30.02.37.14 (version=TLSv1.1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Mon, 30 Mar 2015 02:37:16 -0700 (PDT) From: Ard Biesheuvel To: linux-arm-kernel@lists.infradead.org, linux-crypto@vger.kernel.org, samitolvanen@google.com, herbert@gondor.apana.org.au, jussi.kivilinna@iki.fi, stockhausen@collogia.de, x86@kernel.org Cc: Ard Biesheuvel Subject: [PATCH v2 08/14] crypto/arm: move SHA-1 ARMv8 implementation to base layer Date: Mon, 30 Mar 2015 11:36:23 +0200 Message-Id: <1427708184-2353-14-git-send-email-ard.biesheuvel@linaro.org> X-Mailer: git-send-email 1.8.3.2 In-Reply-To: <1427708184-2353-1-git-send-email-ard.biesheuvel@linaro.org> References: <1427708184-2353-1-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 Signed-off-by: Ard Biesheuvel --- arch/arm/crypto/Kconfig | 2 +- arch/arm/crypto/sha1-ce-glue.c | 110 +++++++++++------------------------------ 2 files changed, 31 insertions(+), 81 deletions(-) diff --git a/arch/arm/crypto/Kconfig b/arch/arm/crypto/Kconfig index c111d8992afb..31ad19f18af2 100644 --- a/arch/arm/crypto/Kconfig +++ b/arch/arm/crypto/Kconfig @@ -32,7 +32,7 @@ config CRYPTO_SHA1_ARM_CE tristate "SHA1 digest algorithm (ARM v8 Crypto Extensions)" depends on KERNEL_MODE_NEON select CRYPTO_SHA1_ARM - select CRYPTO_SHA1 + select CRYPTO_SHA1_BASE select CRYPTO_HASH help SHA-1 secure hash standard (FIPS 180-1/DFIPS 180-2) implemented diff --git a/arch/arm/crypto/sha1-ce-glue.c b/arch/arm/crypto/sha1-ce-glue.c index a9dd90df9fd7..29039d1bcdf9 100644 --- a/arch/arm/crypto/sha1-ce-glue.c +++ b/arch/arm/crypto/sha1-ce-glue.c @@ -13,114 +13,64 @@ #include #include -#include #include #include #include #include +#include "sha1.h" + MODULE_DESCRIPTION("SHA1 secure hash using ARMv8 Crypto Extensions"); MODULE_AUTHOR("Ard Biesheuvel "); MODULE_LICENSE("GPL v2"); -asmlinkage void sha1_ce_transform(int blocks, u8 const *src, u32 *state, - u8 *head); - -static int sha1_init(struct shash_desc *desc) -{ - struct sha1_state *sctx = shash_desc_ctx(desc); - - *sctx = (struct sha1_state){ - .state = { SHA1_H0, SHA1_H1, SHA1_H2, SHA1_H3, SHA1_H4 }, - }; - return 0; -} +asmlinkage void sha1_ce_transform(int blocks, u8 const *src, u32 *state, + const u8 *head, void *p); -static int sha1_update(struct shash_desc *desc, const u8 *data, - unsigned int len) +static int sha1_ce_update(struct shash_desc *desc, const u8 *data, + unsigned int len) { struct sha1_state *sctx = shash_desc_ctx(desc); - unsigned int partial; - if (!may_use_simd()) + if (!may_use_simd() || + (sctx->count % SHA1_BLOCK_SIZE) + len < SHA1_BLOCK_SIZE) return sha1_update_arm(desc, data, len); - partial = sctx->count % SHA1_BLOCK_SIZE; - sctx->count += len; + kernel_neon_begin(); + crypto_sha1_base_do_update(desc, data, len, sha1_ce_transform, NULL); + kernel_neon_end(); - if ((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; - - kernel_neon_begin(); - sha1_ce_transform(blocks, data, sctx->state, - partial ? sctx->buffer : NULL); - kernel_neon_end(); - - data += blocks * SHA1_BLOCK_SIZE; - partial = 0; - } - if (len) - memcpy(sctx->buffer + partial, data, len); return 0; } -static int sha1_final(struct shash_desc *desc, u8 *out) +static int sha1_ce_finup(struct shash_desc *desc, const u8 *data, + unsigned int len, u8 *out) { - static const u8 padding[SHA1_BLOCK_SIZE] = { 0x80, }; - - struct sha1_state *sctx = shash_desc_ctx(desc); - __be64 bits = cpu_to_be64(sctx->count << 3); - __be32 *dst = (__be32 *)out; - int i; - - u32 padlen = SHA1_BLOCK_SIZE - - ((sctx->count + sizeof(bits)) % SHA1_BLOCK_SIZE); - - sha1_update(desc, padding, padlen); - sha1_update(desc, (const u8 *)&bits, sizeof(bits)); - - for (i = 0; i < SHA1_DIGEST_SIZE / sizeof(__be32); i++) - put_unaligned_be32(sctx->state[i], dst++); - - *sctx = (struct sha1_state){}; - return 0; -} + if (!may_use_simd()) + return sha1_finup_arm(desc, data, len, out); -static int sha1_export(struct shash_desc *desc, void *out) -{ - struct sha1_state *sctx = shash_desc_ctx(desc); - struct sha1_state *dst = out; + kernel_neon_begin(); + if (len) + crypto_sha1_base_do_update(desc, data, len, + sha1_ce_transform, NULL); + crypto_sha1_base_do_finalize(desc, sha1_ce_transform, NULL); + kernel_neon_end(); - *dst = *sctx; - return 0; + return crypto_sha1_base_finish(desc, out); } -static int sha1_import(struct shash_desc *desc, const void *in) +static int sha1_ce_final(struct shash_desc *desc, u8 *out) { - struct sha1_state *sctx = shash_desc_ctx(desc); - struct sha1_state const *src = in; - - *sctx = *src; - return 0; + return sha1_ce_finup(desc, NULL, 0l, out); } static struct shash_alg alg = { - .init = sha1_init, - .update = sha1_update, - .final = sha1_final, - .export = sha1_export, - .import = sha1_import, + .init = crypto_sha1_base_init, + .update = sha1_ce_update, + .final = sha1_ce_final, + .finup = sha1_ce_finup, + .export = crypto_sha1_base_export, + .import = crypto_sha1_base_import, .descsize = sizeof(struct sha1_state), .digestsize = SHA1_DIGEST_SIZE, .statesize = sizeof(struct sha1_state),