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[92.90.20.129]) by mx.google.com with ESMTPSA id jt8sm15507705wid.4.2015.03.30.02.37.17 (version=TLSv1.1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Mon, 30 Mar 2015 02:37:19 -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 09/14] crypto/arm: move SHA-224/256 ARMv8 implementation to base layer Date: Mon, 30 Mar 2015 11:36:24 +0200 Message-Id: <1427708184-2353-15-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 | 1 + arch/arm/crypto/sha2-ce-glue.c | 151 +++++++++-------------------------------- 2 files changed, 33 insertions(+), 119 deletions(-) diff --git a/arch/arm/crypto/Kconfig b/arch/arm/crypto/Kconfig index 31ad19f18af2..de91f0447240 100644 --- a/arch/arm/crypto/Kconfig +++ b/arch/arm/crypto/Kconfig @@ -42,6 +42,7 @@ config CRYPTO_SHA2_ARM_CE tristate "SHA-224/256 digest algorithm (ARM v8 Crypto Extensions)" depends on KERNEL_MODE_NEON select CRYPTO_SHA256 + select CRYPTO_SHA256_BASE select CRYPTO_HASH help SHA-256 secure hash standard (DFIPS 180-2) implemented diff --git a/arch/arm/crypto/sha2-ce-glue.c b/arch/arm/crypto/sha2-ce-glue.c index 9ffe8ad27402..df57192c41cd 100644 --- a/arch/arm/crypto/sha2-ce-glue.c +++ b/arch/arm/crypto/sha2-ce-glue.c @@ -23,140 +23,52 @@ MODULE_AUTHOR("Ard Biesheuvel "); MODULE_LICENSE("GPL v2"); asmlinkage void sha2_ce_transform(int blocks, u8 const *src, u32 *state, - u8 *head); + const u8 *head, void *p); -static int sha224_init(struct shash_desc *desc) +static int sha2_ce_update(struct shash_desc *desc, const u8 *data, + unsigned int len) { struct sha256_state *sctx = shash_desc_ctx(desc); - *sctx = (struct sha256_state){ - .state = { - SHA224_H0, SHA224_H1, SHA224_H2, SHA224_H3, - SHA224_H4, SHA224_H5, SHA224_H6, SHA224_H7, - } - }; - return 0; -} + if (!may_use_simd() || + (sctx->count % SHA256_BLOCK_SIZE) + len < SHA256_BLOCK_SIZE) + return crypto_sha256_update(desc, data, len); -static int sha256_init(struct shash_desc *desc) -{ - struct sha256_state *sctx = shash_desc_ctx(desc); + kernel_neon_begin(); + crypto_sha256_base_do_update(desc, data, len, sha2_ce_transform, NULL); + kernel_neon_end(); - *sctx = (struct sha256_state){ - .state = { - SHA256_H0, SHA256_H1, SHA256_H2, SHA256_H3, - SHA256_H4, SHA256_H5, SHA256_H6, SHA256_H7, - } - }; return 0; } -static int sha2_update(struct shash_desc *desc, const u8 *data, - unsigned int len) +static int sha2_ce_finup(struct shash_desc *desc, const u8 *data, + unsigned int len, u8 *out) { - struct sha256_state *sctx = shash_desc_ctx(desc); - unsigned int partial; - if (!may_use_simd()) - return crypto_sha256_update(desc, data, len); - - partial = sctx->count % SHA256_BLOCK_SIZE; - sctx->count += len; - - if ((partial + len) >= SHA256_BLOCK_SIZE) { - int blocks; - - if (partial) { - int p = SHA256_BLOCK_SIZE - partial; - - memcpy(sctx->buf + partial, data, p); - data += p; - len -= p; - } + return crypto_sha256_finup(desc, data, len, out); - blocks = len / SHA256_BLOCK_SIZE; - len %= SHA256_BLOCK_SIZE; - - kernel_neon_begin(); - sha2_ce_transform(blocks, data, sctx->state, - partial ? sctx->buf : NULL); - kernel_neon_end(); - - data += blocks * SHA256_BLOCK_SIZE; - partial = 0; - } + kernel_neon_begin(); if (len) - memcpy(sctx->buf + partial, data, len); - return 0; -} - -static void sha2_final(struct shash_desc *desc) -{ - static const u8 padding[SHA256_BLOCK_SIZE] = { 0x80, }; - - struct sha256_state *sctx = shash_desc_ctx(desc); - __be64 bits = cpu_to_be64(sctx->count << 3); - u32 padlen = SHA256_BLOCK_SIZE - - ((sctx->count + sizeof(bits)) % SHA256_BLOCK_SIZE); - - sha2_update(desc, padding, padlen); - sha2_update(desc, (const u8 *)&bits, sizeof(bits)); -} + crypto_sha256_base_do_update(desc, data, len, + sha2_ce_transform, NULL); + crypto_sha256_base_do_finalize(desc, sha2_ce_transform, NULL); + kernel_neon_end(); -static int sha224_final(struct shash_desc *desc, u8 *out) -{ - struct sha256_state *sctx = shash_desc_ctx(desc); - __be32 *dst = (__be32 *)out; - int i; - - sha2_final(desc); - - for (i = 0; i < SHA224_DIGEST_SIZE / sizeof(__be32); i++) - put_unaligned_be32(sctx->state[i], dst++); - - *sctx = (struct sha256_state){}; - return 0; + return crypto_sha256_base_finish(desc, out); } -static int sha256_final(struct shash_desc *desc, u8 *out) +static int sha2_ce_final(struct shash_desc *desc, u8 *out) { - struct sha256_state *sctx = shash_desc_ctx(desc); - __be32 *dst = (__be32 *)out; - int i; - - sha2_final(desc); - - for (i = 0; i < SHA256_DIGEST_SIZE / sizeof(__be32); i++) - put_unaligned_be32(sctx->state[i], dst++); - - *sctx = (struct sha256_state){}; - return 0; -} - -static int sha2_export(struct shash_desc *desc, void *out) -{ - struct sha256_state *sctx = shash_desc_ctx(desc); - struct sha256_state *dst = out; - - *dst = *sctx; - return 0; -} - -static int sha2_import(struct shash_desc *desc, const void *in) -{ - struct sha256_state *sctx = shash_desc_ctx(desc); - struct sha256_state const *src = in; - - *sctx = *src; - return 0; + return sha2_ce_finup(desc, NULL, 0, out); } static struct shash_alg algs[] = { { - .init = sha224_init, - .update = sha2_update, - .final = sha224_final, - .export = sha2_export, - .import = sha2_import, + .init = crypto_sha224_base_init, + .update = sha2_ce_update, + .final = sha2_ce_final, + .finup = sha2_ce_finup, + .export = crypto_sha256_base_export, + .import = crypto_sha256_base_import, .descsize = sizeof(struct sha256_state), .digestsize = SHA224_DIGEST_SIZE, .statesize = sizeof(struct sha256_state), @@ -169,11 +81,12 @@ static struct shash_alg algs[] = { { .cra_module = THIS_MODULE, } }, { - .init = sha256_init, - .update = sha2_update, - .final = sha256_final, - .export = sha2_export, - .import = sha2_import, + .init = crypto_sha256_base_init, + .update = sha2_ce_update, + .final = sha2_ce_final, + .finup = sha2_ce_finup, + .export = crypto_sha256_base_export, + .import = crypto_sha256_base_import, .descsize = sizeof(struct sha256_state), .digestsize = SHA256_DIGEST_SIZE, .statesize = sizeof(struct sha256_state),