linux/include/crypto/utils.h

/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
 * Cryptographic utilities
 *
 * Copyright (c) 2023 Herbert Xu <[email protected]>
 */
#ifndef _CRYPTO_UTILS_H
#define _CRYPTO_UTILS_H

#include <asm/unaligned.h>
#include <linux/compiler_attributes.h>
#include <linux/types.h>

void __crypto_xor(u8 *dst, const u8 *src1, const u8 *src2, unsigned int size);

static inline void crypto_xor(u8 *dst, const u8 *src, unsigned int size)
{ … }

static inline void crypto_xor_cpy(u8 *dst, const u8 *src1, const u8 *src2,
				  unsigned int size)
{ … }

noinline unsigned long __crypto_memneq(const void *a, const void *b, size_t size);

/**
 * crypto_memneq - Compare two areas of memory without leaking
 *		   timing information.
 *
 * @a: One area of memory
 * @b: Another area of memory
 * @size: The size of the area.
 *
 * Returns 0 when data is equal, 1 otherwise.
 */
static inline int crypto_memneq(const void *a, const void *b, size_t size)
{ … }

#endif	/* _CRYPTO_UTILS_H */