cregit-Linux how code gets into the kernel

Release 4.12 include/linux/siphash.h

Directory: include/linux
/* Copyright (C) 2016 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
 *
 * This file is provided under a dual BSD/GPLv2 license.
 *
 * SipHash: a fast short-input PRF
 * https://131002.net/siphash/
 *
 * This implementation is specifically for SipHash2-4 for a secure PRF
 * and HalfSipHash1-3/SipHash1-3 for an insecure PRF only suitable for
 * hashtables.
 */

#ifndef _LINUX_SIPHASH_H

#define _LINUX_SIPHASH_H

#include <linux/types.h>
#include <linux/kernel.h>


#define SIPHASH_ALIGNMENT __alignof__(u64)
typedef struct {
	
u64 key[2];

} siphash_key_t;

u64 __siphash_aligned(const void *data, size_t len, const siphash_key_t *key);
#ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS
u64 __siphash_unaligned(const void *data, size_t len, const siphash_key_t *key);
#endif

u64 siphash_1u64(const u64 a, const siphash_key_t *key);
u64 siphash_2u64(const u64 a, const u64 b, const siphash_key_t *key);
u64 siphash_3u64(const u64 a, const u64 b, const u64 c,
		 const siphash_key_t *key);
u64 siphash_4u64(const u64 a, const u64 b, const u64 c, const u64 d,
		 const siphash_key_t *key);
u64 siphash_1u32(const u32 a, const siphash_key_t *key);
u64 siphash_3u32(const u32 a, const u32 b, const u32 c,
		 const siphash_key_t *key);


static inline u64 siphash_2u32(const u32 a, const u32 b, const siphash_key_t *key) { return siphash_1u64((u64)b << 32 | a, key); }

Contributors

PersonTokensPropCommitsCommitProp
Jason A. Donenfeld35100.00%1100.00%
Total35100.00%1100.00%


static inline u64 siphash_4u32(const u32 a, const u32 b, const u32 c, const u32 d, const siphash_key_t *key) { return siphash_2u64((u64)b << 32 | a, (u64)d << 32 | c, key); }

Contributors

PersonTokensPropCommitsCommitProp
Jason A. Donenfeld52100.00%1100.00%
Total52100.00%1100.00%


static inline u64 ___siphash_aligned(const __le64 *data, size_t len, const siphash_key_t *key) { if (__builtin_constant_p(len) && len == 4) return siphash_1u32(le32_to_cpup((const __le32 *)data), key); if (__builtin_constant_p(len) && len == 8) return siphash_1u64(le64_to_cpu(data[0]), key); if (__builtin_constant_p(len) && len == 16) return siphash_2u64(le64_to_cpu(data[0]), le64_to_cpu(data[1]), key); if (__builtin_constant_p(len) && len == 24) return siphash_3u64(le64_to_cpu(data[0]), le64_to_cpu(data[1]), le64_to_cpu(data[2]), key); if (__builtin_constant_p(len) && len == 32) return siphash_4u64(le64_to_cpu(data[0]), le64_to_cpu(data[1]), le64_to_cpu(data[2]), le64_to_cpu(data[3]), key); return __siphash_aligned(data, len, key); }

Contributors

PersonTokensPropCommitsCommitProp
Jason A. Donenfeld205100.00%1100.00%
Total205100.00%1100.00%

/** * siphash - compute 64-bit siphash PRF value * @data: buffer to hash * @size: size of @data * @key: the siphash key */
static inline u64 siphash(const void *data, size_t len, const siphash_key_t *key) { #ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS if (!IS_ALIGNED((unsigned long)data, SIPHASH_ALIGNMENT)) return __siphash_unaligned(data, len, key); #endif return ___siphash_aligned(data, len, key); }

Contributors

PersonTokensPropCommitsCommitProp
Jason A. Donenfeld59100.00%1100.00%
Total59100.00%1100.00%

#define HSIPHASH_ALIGNMENT __alignof__(unsigned long) typedef struct { unsigned long key[2]; } hsiphash_key_t; u32 __hsiphash_aligned(const void *data, size_t len, const hsiphash_key_t *key); #ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS u32 __hsiphash_unaligned(const void *data, size_t len, const hsiphash_key_t *key); #endif u32 hsiphash_1u32(const u32 a, const hsiphash_key_t *key); u32 hsiphash_2u32(const u32 a, const u32 b, const hsiphash_key_t *key); u32 hsiphash_3u32(const u32 a, const u32 b, const u32 c, const hsiphash_key_t *key); u32 hsiphash_4u32(const u32 a, const u32 b, const u32 c, const u32 d, const hsiphash_key_t *key);
static inline u32 ___hsiphash_aligned(const __le32 *data, size_t len, const hsiphash_key_t *key) { if (__builtin_constant_p(len) && len == 4) return hsiphash_1u32(le32_to_cpu(data[0]), key); if (__builtin_constant_p(len) && len == 8) return hsiphash_2u32(le32_to_cpu(data[0]), le32_to_cpu(data[1]), key); if (__builtin_constant_p(len) && len == 12) return hsiphash_3u32(le32_to_cpu(data[0]), le32_to_cpu(data[1]), le32_to_cpu(data[2]), key); if (__builtin_constant_p(len) && len == 16) return hsiphash_4u32(le32_to_cpu(data[0]), le32_to_cpu(data[1]), le32_to_cpu(data[2]), le32_to_cpu(data[3]), key); return __hsiphash_aligned(data, len, key); }

Contributors

PersonTokensPropCommitsCommitProp
Jason A. Donenfeld178100.00%1100.00%
Total178100.00%1100.00%

/** * hsiphash - compute 32-bit hsiphash PRF value * @data: buffer to hash * @size: size of @data * @key: the hsiphash key */
static inline u32 hsiphash(const void *data, size_t len, const hsiphash_key_t *key) { #ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS if (!IS_ALIGNED((unsigned long)data, HSIPHASH_ALIGNMENT)) return __hsiphash_unaligned(data, len, key); #endif return ___hsiphash_aligned(data, len, key); }

Contributors

PersonTokensPropCommitsCommitProp
Jason A. Donenfeld59100.00%1100.00%
Total59100.00%1100.00%

#endif /* _LINUX_SIPHASH_H */

Overall Contributors

PersonTokensPropCommitsCommitProp
Jason A. Donenfeld903100.00%2100.00%
Total903100.00%2100.00%
Directory: include/linux
Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.
Created with cregit.