NAME
SipHash24_Init,
SipHash24_Update,
SipHash24_End,
SipHash24_Final, SipHash24
— calculate SipHash24
hashes
SYNOPSIS
#include
<siphash.h>
void
SipHash24_Init(SIPHASH_CTX
*ctx, const SIPHASH_KEY
*key);
void
SipHash24_Update(SIPHASH_CTX
*ctx, const void
*data, size_t
len);
uint64_t
SipHash24_End(SIPHASH_CTX
*ctx);
void
SipHash24_Final(void
*digest, SIPHASH_CTX
*ctx);
uint64_t
SipHash24(const
SIPHASH_KEY *key, const
void *data, size_t
len);
DESCRIPTION
The SipHash algorithm is a keyed hash algorithm optimised for short inputs which produces a 64-bit digest of data. The SipHash24 functions implement the algorithm with 2 compression rounds and 4 finalisation rounds.
SipHash24_Init()
initialises a SIPHASH_CTX context
ctx with the secret key.
SipHash24_Update()
adds data of length len to the
context ctx.
SipHash24_End()
is called after all data has been added to ctx via
SipHash24_Update() and returns a message digest in
the host's native endian.
SipHash24_Final()
is called after all data has been added to ctx via
SipHash24_Update() and stores the message digest at
the address specified by the digest parameter. The
buffer at digest must be
SIPHASH_DIGEST_LENGTH bytes long.
SipHash24()
calculates the digest of data of length
len with the secret key.
It is recommended that the SIPHASH_KEY key be generated with arc4random_buf(3).
RETURN VALUES
SipHash24_End() and
SipHash24() return the 64-bit message digest in the
host's native endian representation.
SEE ALSO
HISTORY
These functions appeared in OpenBSD 5.7.