linux/arch/x86/crypto/polyval-clmulni_glue.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Glue code for POLYVAL using PCMULQDQ-NI
 *
 * Copyright (c) 2007 Nokia Siemens Networks - Mikko Herranen <[email protected]>
 * Copyright (c) 2009 Intel Corp.
 *   Author: Huang Ying <[email protected]>
 * Copyright 2021 Google LLC
 */

/*
 * Glue code based on ghash-clmulni-intel_glue.c.
 *
 * This implementation of POLYVAL uses montgomery multiplication
 * accelerated by PCLMULQDQ-NI to implement the finite field
 * operations.
 */

#include <crypto/algapi.h>
#include <crypto/internal/hash.h>
#include <crypto/internal/simd.h>
#include <crypto/polyval.h>
#include <linux/crypto.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <asm/cpu_device_id.h>
#include <asm/simd.h>

#define POLYVAL_ALIGN …
#define POLYVAL_ALIGN_ATTR …
#define POLYVAL_ALIGN_EXTRA …
#define POLYVAL_CTX_SIZE …
#define NUM_KEY_POWERS …

struct polyval_tfm_ctx { … };

struct polyval_desc_ctx { … };

asmlinkage void clmul_polyval_update(const struct polyval_tfm_ctx *keys,
	const u8 *in, size_t nblocks, u8 *accumulator);
asmlinkage void clmul_polyval_mul(u8 *op1, const u8 *op2);

static inline struct polyval_tfm_ctx *polyval_tfm_ctx(struct crypto_shash *tfm)
{ … }

static void internal_polyval_update(const struct polyval_tfm_ctx *keys,
	const u8 *in, size_t nblocks, u8 *accumulator)
{ … }

static void internal_polyval_mul(u8 *op1, const u8 *op2)
{ … }

static int polyval_x86_setkey(struct crypto_shash *tfm,
			const u8 *key, unsigned int keylen)
{ … }

static int polyval_x86_init(struct shash_desc *desc)
{ … }

static int polyval_x86_update(struct shash_desc *desc,
			 const u8 *src, unsigned int srclen)
{ … }

static int polyval_x86_final(struct shash_desc *desc, u8 *dst)
{ … }

static struct shash_alg polyval_alg = …;

__maybe_unused static const struct x86_cpu_id pcmul_cpu_id[] = …;
MODULE_DEVICE_TABLE(x86cpu, pcmul_cpu_id);

static int __init polyval_clmulni_mod_init(void)
{ … }

static void __exit polyval_clmulni_mod_exit(void)
{ … }

module_init(…) …;
module_exit(polyval_clmulni_mod_exit);

MODULE_LICENSE(…) …;
MODULE_DESCRIPTION(…) …;
MODULE_ALIAS_CRYPTO(…) …;
MODULE_ALIAS_CRYPTO(…) …;