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[92.90.20.129]) by mx.google.com with ESMTPSA id eo1sm14912443wib.16.2015.03.30.02.49.28 (version=TLSv1.1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Mon, 30 Mar 2015 02:49:30 -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 resend 10/14] crypto/arm64: move SHA-1 ARMv8 implementation to base layer Date: Mon, 30 Mar 2015 11:48:29 +0200 Message-Id: <1427708913-29678-11-git-send-email-ard.biesheuvel@linaro.org> X-Mailer: git-send-email 1.8.3.2 In-Reply-To: <1427708913-29678-1-git-send-email-ard.biesheuvel@linaro.org> References: <1427708913-29678-1-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 209.85.216.171 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: , Signed-off-by: Ard Biesheuvel --- arch/arm64/crypto/Kconfig | 1 + arch/arm64/crypto/sha1-ce-core.S | 11 ++-- arch/arm64/crypto/sha1-ce-glue.c | 132 +++++++-------------------------------- 3 files changed, 31 insertions(+), 113 deletions(-) diff --git a/arch/arm64/crypto/Kconfig b/arch/arm64/crypto/Kconfig index 2cf32e9887e1..c87792dfaacc 100644 --- a/arch/arm64/crypto/Kconfig +++ b/arch/arm64/crypto/Kconfig @@ -12,6 +12,7 @@ config CRYPTO_SHA1_ARM64_CE tristate "SHA-1 digest algorithm (ARMv8 Crypto Extensions)" depends on ARM64 && KERNEL_MODE_NEON select CRYPTO_HASH + select CRYPTO_SHA1_BASE config CRYPTO_SHA2_ARM64_CE tristate "SHA-224/SHA-256 digest algorithm (ARMv8 Crypto Extensions)" diff --git a/arch/arm64/crypto/sha1-ce-core.S b/arch/arm64/crypto/sha1-ce-core.S index 09d57d98609c..a2c3ad51286b 100644 --- a/arch/arm64/crypto/sha1-ce-core.S +++ b/arch/arm64/crypto/sha1-ce-core.S @@ -131,15 +131,18 @@ CPU_LE( rev32 v11.16b, v11.16b ) /* * Final block: add padding and total bit count. - * Skip if we have no total byte count in x4. In that case, the input - * size was not a round multiple of the block size, and the padding is - * handled by the C code. + * Skip if the input size was not a round multiple of the block size, + * the padding is handled by the C code in that case. */ cbz x4, 3f + ldr x5, [x2, #-8] // sha1_state::count + tst x5, #0x3f // round multiple of block size? + b.ne 3f + str wzr, [x4] movi v9.2d, #0 mov x8, #0x80000000 movi v10.2d, #0 - ror x7, x4, #29 // ror(lsl(x4, 3), 32) + ror x7, x5, #29 // ror(lsl(x4, 3), 32) fmov d8, x8 mov x4, #0 mov v11.d[0], xzr diff --git a/arch/arm64/crypto/sha1-ce-glue.c b/arch/arm64/crypto/sha1-ce-glue.c index 6fe83f37a750..a1cf07b9a8fa 100644 --- a/arch/arm64/crypto/sha1-ce-glue.c +++ b/arch/arm64/crypto/sha1-ce-glue.c @@ -21,132 +21,46 @@ MODULE_AUTHOR("Ard Biesheuvel "); MODULE_LICENSE("GPL v2"); asmlinkage void sha1_ce_transform(int blocks, u8 const *src, u32 *state, - u8 *head, long bytes); + const u8 *head, void *p); -static int sha1_init(struct shash_desc *desc) +static int sha1_ce_update(struct shash_desc *desc, const u8 *data, + unsigned int len) { - 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; -} - -static int sha1_update(struct shash_desc *desc, const u8 *data, - unsigned int len) -{ - struct sha1_state *sctx = shash_desc_ctx(desc); - unsigned int partial = sctx->count % SHA1_BLOCK_SIZE; - - sctx->count += len; - - 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_partial(16); - sha1_ce_transform(blocks, data, sctx->state, - partial ? sctx->buffer : NULL, 0); - 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 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++); + kernel_neon_begin_partial(16); + crypto_sha1_base_do_update(desc, data, len, sha1_ce_transform, NULL); + kernel_neon_end(); - *sctx = (struct sha1_state){}; return 0; } -static int sha1_finup(struct shash_desc *desc, const u8 *data, - unsigned int len, u8 *out) +static int sha1_ce_finup(struct shash_desc *desc, const u8 *data, + unsigned int len, u8 *out) { - struct sha1_state *sctx = shash_desc_ctx(desc); - __be32 *dst = (__be32 *)out; - int blocks; - int i; - - if (sctx->count || !len || (len % SHA1_BLOCK_SIZE)) { - sha1_update(desc, data, len); - return sha1_final(desc, out); - } - - /* - * Use a fast path if the input is a multiple of 64 bytes. In - * this case, there is no need to copy data around, and we can - * perform the entire digest calculation in a single invocation - * of sha1_ce_transform() - */ - blocks = len / SHA1_BLOCK_SIZE; + u32 finalize = 1; kernel_neon_begin_partial(16); - sha1_ce_transform(blocks, data, sctx->state, NULL, len); + if (len) + crypto_sha1_base_do_update(desc, data, len, sha1_ce_transform, + &finalize); + if (finalize) + crypto_sha1_base_do_finalize(desc, sha1_ce_transform, NULL); kernel_neon_end(); - for (i = 0; i < SHA1_DIGEST_SIZE / sizeof(__be32); i++) - put_unaligned_be32(sctx->state[i], dst++); - - *sctx = (struct sha1_state){}; - return 0; + return crypto_sha1_base_finish(desc, out); } -static int sha1_export(struct shash_desc *desc, void *out) +static int sha1_ce_final(struct shash_desc *desc, u8 *out) { - struct sha1_state *sctx = shash_desc_ctx(desc); - struct sha1_state *dst = out; - - *dst = *sctx; - return 0; -} - -static int sha1_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; + return sha1_ce_finup(desc, NULL, 0, out); } static struct shash_alg alg = { - .init = sha1_init, - .update = sha1_update, - .final = sha1_final, - .finup = sha1_finup, - .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),