SipHash implementation plus CWIST-specific entropy expansion for hash seeds. More...

#include <stdint.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <cwist/sys/platform.h>
#include <stdio.h>
#include <string.h>
#include <time.h>
#include <cwist/core/siphash/siphash.h>

Include dependency graph for siphash.c:

Go to the source code of this file.

Macros
#define	ROTL(x, b) (uint64_t)(((x) << (b)) \| ((x) >> (64 - (b))))

Functions
uint64_t	siphash24 (const void *src, size_t len, const uint8_t key[16])
	Compute SipHash-2-4 over a byte range using a 16-byte secret key.

void	cwist_generate_hash_seed (uint8_t key[16])
	Generate a non-trivial 16-byte key suitable for SipHash table seeding.

Detailed Description

SipHash implementation plus CWIST-specific entropy expansion for hash seeds.

Definition in file siphash.c.

Macro Definition Documentation

◆ ROTL

#define ROTL	(	x,
		b
	)	(uint64_t)(((x) << (b)) \| ((x) >> (64 - (b))))

Definition at line 21 of file siphash.c.

Function Documentation

◆ cwist_generate_hash_seed()

void cwist_generate_hash_seed ( uint8_t key[16] )

Generate a non-trivial 16-byte key suitable for SipHash table seeding.

Generates a random SipHash seed.

Parameters

key	Output buffer that receives the generated seed.

Definition at line 223 of file siphash.c.

References cap.

Referenced by cwist_query_map_create_in_arena().

◆ siphash24()

uint64_t siphash24	(	const void *	src,
		size_t	len,
		const uint8_t	key[16]
	)

Compute SipHash-2-4 over a byte range using a 16-byte secret key.

Parameters

src	Input bytes to hash.
len	Number of bytes in `src`.
key	16-byte SipHash key.

Returns: 64-bit keyed hash value.

Definition at line 52 of file siphash.c.