crypto: sha512 - Create module providing optimized SHA512 routines using... (87de4579) · Commits · 戴 / test

arch/x86/crypto/Makefile

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Original line number	Diff line number	Diff line
		@@ -26,6 +26,7 @@ obj-$(CONFIG_CRYPTO_CRC32C_INTEL) += crc32c-intel.o
		obj-$(CONFIG_CRYPTO_SHA1_SSSE3) += sha1-ssse3.o
		obj-$(CONFIG_CRYPTO_CRC32_PCLMUL) += crc32-pclmul.o
		obj-$(CONFIG_CRYPTO_SHA256_SSSE3) += sha256-ssse3.o
		obj-$(CONFIG_CRYPTO_SHA512_SSSE3) += sha512-ssse3.o

		# These modules require assembler to support AVX.
		ifeq ($(avx_supported),yes)
		@@ -68,3 +69,4 @@ crc32c-intel-y := crc32c-intel_glue.o
		crc32c-intel-$(CONFIG_64BIT) += crc32c-pcl-intel-asm_64.o
		crc32-pclmul-y := crc32-pclmul_asm.o crc32-pclmul_glue.o
		sha256-ssse3-y := sha256-ssse3-asm.o sha256-avx-asm.o sha256-avx2-asm.o sha256_ssse3_glue.o
		sha512-ssse3-y := sha512-ssse3-asm.o sha512-avx-asm.o sha512-avx2-asm.o sha512_ssse3_glue.o

arch/x86/crypto/sha512_ssse3_glue.c

0 → 100644

+282 −0

Original line number	Diff line number	Diff line
		/*
		* Cryptographic API.
		*
		* Glue code for the SHA512 Secure Hash Algorithm assembler
		* implementation using supplemental SSE3 / AVX / AVX2 instructions.
		*
		* This file is based on sha512_generic.c
		*
		* Copyright (C) 2013 Intel Corporation
		* Author: Tim Chen <tim.c.chen@linux.intel.com>
		*
		* This program is free software; you can redistribute it and/or modify it
		* under the terms of the GNU General Public License as published by the Free
		* Software Foundation; either version 2 of the License, or (at your option)
		* any later version.
		*
		* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
		* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
		* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
		* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
		* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
		* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
		* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
		* SOFTWARE.
		*
		*/

		#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

		#include <crypto/internal/hash.h>
		#include <linux/init.h>
		#include <linux/module.h>
		#include <linux/mm.h>
		#include <linux/cryptohash.h>
		#include <linux/types.h>
		#include <crypto/sha.h>
		#include <asm/byteorder.h>
		#include <asm/i387.h>
		#include <asm/xcr.h>
		#include <asm/xsave.h>

		#include <linux/string.h>

		asmlinkage void sha512_transform_ssse3(const char data, u64 digest,
		u64 rounds);
		#ifdef CONFIG_AS_AVX
		asmlinkage void sha512_transform_avx(const char data, u64 digest,
		u64 rounds);
		#endif
		#ifdef CONFIG_AS_AVX2
		asmlinkage void sha512_transform_rorx(const char data, u64 digest,
		u64 rounds);
		#endif

		static asmlinkage void (sha512_transform_asm)(const char , u64 *, u64);


		static int sha512_ssse3_init(struct shash_desc *desc)
		{
		struct sha512_state *sctx = shash_desc_ctx(desc);

		sctx->state[0] = SHA512_H0;
		sctx->state[1] = SHA512_H1;
		sctx->state[2] = SHA512_H2;
		sctx->state[3] = SHA512_H3;
		sctx->state[4] = SHA512_H4;
		sctx->state[5] = SHA512_H5;
		sctx->state[6] = SHA512_H6;
		sctx->state[7] = SHA512_H7;
		sctx->count[0] = sctx->count[1] = 0;

		return 0;
		}

		static int __sha512_ssse3_update(struct shash_desc desc, const u8 data,
		unsigned int len, unsigned int partial)
		{
		struct sha512_state *sctx = shash_desc_ctx(desc);
		unsigned int done = 0;

		sctx->count[0] += len;
		if (sctx->count[0] < len)
		sctx->count[1]++;

		if (partial) {
		done = SHA512_BLOCK_SIZE - partial;
		memcpy(sctx->buf + partial, data, done);
		sha512_transform_asm(sctx->buf, sctx->state, 1);
		}

		if (len - done >= SHA512_BLOCK_SIZE) {
		const unsigned int rounds = (len - done) / SHA512_BLOCK_SIZE;

		sha512_transform_asm(data + done, sctx->state, (u64) rounds);

		done += rounds * SHA512_BLOCK_SIZE;
		}

		memcpy(sctx->buf, data + done, len - done);

		return 0;
		}

		static int sha512_ssse3_update(struct shash_desc desc, const u8 data,
		unsigned int len)
		{
		struct sha512_state *sctx = shash_desc_ctx(desc);
		unsigned int partial = sctx->count[0] % SHA512_BLOCK_SIZE;
		int res;

		/* Handle the fast case right here */
		if (partial + len < SHA512_BLOCK_SIZE) {
		sctx->count[0] += len;
		if (sctx->count[0] < len)
		sctx->count[1]++;
		memcpy(sctx->buf + partial, data, len);

		return 0;
		}

		if (!irq_fpu_usable()) {
		res = crypto_sha512_update(desc, data, len);
		} else {
		kernel_fpu_begin();
		res = __sha512_ssse3_update(desc, data, len, partial);
		kernel_fpu_end();
		}

		return res;
		}


		/* Add padding and return the message digest. */
		static int sha512_ssse3_final(struct shash_desc desc, u8 out)
		{
		struct sha512_state *sctx = shash_desc_ctx(desc);
		unsigned int i, index, padlen;
		__be64 dst = (__be64 )out;
		__be64 bits[2];
		static const u8 padding[SHA512_BLOCK_SIZE] = { 0x80, };

		/* save number of bits */
		bits[1] = cpu_to_be64(sctx->count[0] << 3);
		bits[0] = cpu_to_be64(sctx->count[1] << 3) \| sctx->count[0] >> 61;

		/* Pad out to 112 mod 128 and append length */
		index = sctx->count[0] & 0x7f;
		padlen = (index < 112) ? (112 - index) : ((128+112) - index);

		if (!irq_fpu_usable()) {
		crypto_sha512_update(desc, padding, padlen);
		crypto_sha512_update(desc, (const u8 *)&bits, sizeof(bits));
		} else {
		kernel_fpu_begin();
		/* We need to fill a whole block for __sha512_ssse3_update() */
		if (padlen <= 112) {
		sctx->count[0] += padlen;
		if (sctx->count[0] < padlen)
		sctx->count[1]++;
		memcpy(sctx->buf + index, padding, padlen);
		} else {
		__sha512_ssse3_update(desc, padding, padlen, index);
		}
		__sha512_ssse3_update(desc, (const u8 *)&bits,
		sizeof(bits), 112);
		kernel_fpu_end();
		}

		/* Store state in digest */
		for (i = 0; i < 8; i++)
		dst[i] = cpu_to_be64(sctx->state[i]);

		/* Wipe context */
		memset(sctx, 0, sizeof(*sctx));

		return 0;
		}

		static int sha512_ssse3_export(struct shash_desc desc, void out)
		{
		struct sha512_state *sctx = shash_desc_ctx(desc);

		memcpy(out, sctx, sizeof(*sctx));

		return 0;
		}

		static int sha512_ssse3_import(struct shash_desc desc, const void in)
		{
		struct sha512_state *sctx = shash_desc_ctx(desc);

		memcpy(sctx, in, sizeof(*sctx));

		return 0;
		}

		static struct shash_alg alg = {
		.digestsize = SHA512_DIGEST_SIZE,
		.init = sha512_ssse3_init,
		.update = sha512_ssse3_update,
		.final = sha512_ssse3_final,
		.export = sha512_ssse3_export,
		.import = sha512_ssse3_import,
		.descsize = sizeof(struct sha512_state),
		.statesize = sizeof(struct sha512_state),
		.base = {
		.cra_name = "sha512",
		.cra_driver_name = "sha512-ssse3",
		.cra_priority = 150,
		.cra_flags = CRYPTO_ALG_TYPE_SHASH,
		.cra_blocksize = SHA512_BLOCK_SIZE,
		.cra_module = THIS_MODULE,
		}
		};

		#ifdef CONFIG_AS_AVX
		static bool __init avx_usable(void)
		{
		u64 xcr0;

		if (!cpu_has_avx \|\| !cpu_has_osxsave)
		return false;

		xcr0 = xgetbv(XCR_XFEATURE_ENABLED_MASK);
		if ((xcr0 & (XSTATE_SSE \| XSTATE_YMM)) != (XSTATE_SSE \| XSTATE_YMM)) {
		pr_info("AVX detected but unusable.\n");

		return false;
		}

		return true;
		}
		#endif

		static int __init sha512_ssse3_mod_init(void)
		{
		/* test for SSE3 first */
		if (cpu_has_ssse3)
		sha512_transform_asm = sha512_transform_ssse3;

		#ifdef CONFIG_AS_AVX
		/* allow AVX to override SSSE3, it's a little faster */
		if (avx_usable()) {
		#ifdef CONFIG_AS_AVX2
		if (boot_cpu_has(X86_FEATURE_AVX2))
		sha512_transform_asm = sha512_transform_rorx;
		else
		#endif
		sha512_transform_asm = sha512_transform_avx;
		}
		#endif

		if (sha512_transform_asm) {
		#ifdef CONFIG_AS_AVX
		if (sha512_transform_asm == sha512_transform_avx)
		pr_info("Using AVX optimized SHA-512 implementation\n");
		#ifdef CONFIG_AS_AVX2
		else if (sha512_transform_asm == sha512_transform_rorx)
		pr_info("Using AVX2 optimized SHA-512 implementation\n");
		#endif
		else
		#endif
		pr_info("Using SSSE3 optimized SHA-512 implementation\n");
		return crypto_register_shash(&alg);
		}
		pr_info("Neither AVX nor SSSE3 is available/usable.\n");

		return -ENODEV;
		}

		static void __exit sha512_ssse3_mod_fini(void)
		{
		crypto_unregister_shash(&alg);
		}

		module_init(sha512_ssse3_mod_init);
		module_exit(sha512_ssse3_mod_fini);

		MODULE_LICENSE("GPL");
		MODULE_DESCRIPTION("SHA512 Secure Hash Algorithm, Supplemental SSE3 accelerated");

		MODULE_ALIAS("sha512");

crypto/Kconfig

+11 −0

Original line number	Diff line number	Diff line
		@@ -481,6 +481,17 @@ config CRYPTO_SHA256_SSSE3
		Extensions version 1 (AVX1), or Advanced Vector Extensions
		version 2 (AVX2) instructions, when available.

		config CRYPTO_SHA512_SSSE3
		tristate "SHA512 digest algorithm (SSSE3/AVX/AVX2)"
		depends on X86 && 64BIT
		select CRYPTO_SHA512
		select CRYPTO_HASH
		help
		SHA-512 secure hash standard (DFIPS 180-2) implemented
		using Supplemental SSE3 (SSSE3) instructions, or Advanced Vector
		Extensions version 1 (AVX1), or Advanced Vector Extensions
		version 2 (AVX2) instructions, when available.

		config CRYPTO_SHA1_SPARC64
		tristate "SHA1 digest algorithm (SPARC64)"
		depends on SPARC64

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