io.warp10.crypto

Class SipHashInline

java.lang.Object

io.warp10.crypto.SipHashInline

public class SipHashInline
extends java.lang.Object

SipHash implementation with hand inlining the SIPROUND.

To know details about SipHash, see; "a fast short-input PRF" https://www.131002.net/siphash/

SIPROUND is defined in siphash24.c that can be downloaded from the above site. Following license notice is subject to change based on the licensing policy of siphash24.c.

See Also:

https://github.com/nahi/siphash-java-inline

Constructor Summary

Constructors

Constructor and Description
SipHashInline()

Method Summary

Modifier and Type	Method and Description
static long[]	getKey(byte[] key) Get key long [ ].
static long	hash24_palindromic(byte[] key, byte[] data) Hash 24 palindromic long.
static long	hash24_palindromic(byte[] key, byte[] data, int offset, int len) Hash 24 palindromic long.
static long	hash24_palindromic(long k0, long k1, byte[] data) Hash 24 palindromic long.
static long	hash24_palindromic(long k0, long k1, byte[] data, int offset, int len) Version of SipHash which computes the hash of the input concatenated with the reversed input in order to minimize the risk of collisions (for a collision to be an actual value, it must have the same structure as the original input, i.e.
static long	hash24(byte[] key, byte[] data) Hash 24 long.
static long	hash24(byte[] key, byte[] data, int offset, int len) Hash 24 long.
static long	hash24(byte[] key, byte[] data, int offset, int len, boolean reversed) Hash 24 long.
static long	hash24(long k0, long k1, byte[] data, int offset, int len) Hash 24 long.
static long	hash24(long k0, long k1, byte[] data, int offset, int len, boolean reversed) Hash 24 long.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

SipHashInline

public SipHashInline()

Method Detail

hash24

public static long hash24(byte[] key,
                          byte[] data,
                          int offset,
                          int len)

Hash 24 long.

Parameters:

key - the key

data - the data

offset - the offset

len - the len

Returns:

the long

hash24

public static long hash24(byte[] key,
                          byte[] data,
                          int offset,
                          int len,
                          boolean reversed)

Hash 24 long.

Parameters:

key - the key

data - the data

offset - the offset

len - the len

reversed - the reversed

Returns:

the long

hash24

public static long hash24(byte[] key,
                          byte[] data)

Hash 24 long.

Parameters:

key - the key

data - the data

Returns:

the long

hash24

public static long hash24(long k0,
                          long k1,
                          byte[] data,
                          int offset,
                          int len)

Hash 24 long.

Parameters:

k0 - the k 0

k1 - the k 1

data - the data

offset - the offset

len - the len

Returns:

the long

hash24

public static long hash24(long k0,
                          long k1,
                          byte[] data,
                          int offset,
                          int len,
                          boolean reversed)

Hash 24 long.

Parameters:

k0 - the k 0

k1 - the k 1

data - the data

offset - the offset

len - the len

reversed - the reversed

Returns:

the long

hash24_palindromic

public static long hash24_palindromic(long k0,
                                      long k1,
                                      byte[] data,
                                      int offset,
                                      int len)

Version of SipHash which computes the hash of the input concatenated with the reversed input in order to minimize the risk of collisions (for a collision to be an actual value, it must have the same structure as the original input, i.e. be a palindrome).

Parameters:

k0 - the k 0

k1 - the k 1

data - the data

offset - the offset

len - the len

Returns:

long

hash24_palindromic

public static long hash24_palindromic(byte[] key,
                                      byte[] data,
                                      int offset,
                                      int len)

Hash 24 palindromic long.

Parameters:

key - the key

data - the data

offset - the offset

len - the len

Returns:

the long

hash24_palindromic

public static long hash24_palindromic(long k0,
                                      long k1,
                                      byte[] data)

Hash 24 palindromic long.

Parameters:

k0 - the k 0

k1 - the k 1

data - the data

Returns:

the long

hash24_palindromic

public static long hash24_palindromic(byte[] key,
                                      byte[] data)

Hash 24 palindromic long.

Parameters:

key - the key

data - the data

Returns:

the long

getKey

public static long[] getKey(byte[] key)

Get key long [ ].

Parameters:

key - the key

Returns:

the long [ ]