io.warp10.crypto

Class CryptoUtils

java.lang.Object

io.warp10.crypto.CryptoUtils

public class CryptoUtils
extends java.lang.Object

The type Crypto utils.

Constructor Summary

Constructors

Constructor and Description
CryptoUtils()

Method Summary

Modifier and Type	Method and Description
static byte[]	addMAC(byte[] key, byte[] data) Add mac byte [ ].
static byte[]	addMAC(long[] key, byte[] data) Add mac byte [ ].
static byte[]	invert(byte[] key) Invert byte [ ].
static byte[]	removeMAC(byte[] key, byte[] data) Check the MAC and return the verified content or null if the verification failed
static byte[]	removeMAC(long[] key, byte[] data) Remove mac byte [ ].
static long	safeSipHash(long k0, long k1, byte[] msg) Compute a safe SipHash of a given input by computing the forward hash, the hash of the reversed input and finally the hash of the two concatenated hashes.
static byte[]	unwrap(byte[] key, byte[] data) Unwrap byte [ ].
static byte[]	wrap(byte[] key, byte[] data) Wrap byte [ ].

Methods inherited from class java.lang.Object

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

Constructor Detail

CryptoUtils

public CryptoUtils()

Method Detail

wrap

public static byte[] wrap(byte[] key,
                          byte[] data)

Wrap byte [ ].

Parameters:

key - the key

data - the data

Returns:

the byte [ ]

unwrap

public static byte[] unwrap(byte[] key,
                            byte[] data)

Unwrap byte [ ].

Parameters:

key - the key

data - the data

Returns:

the byte [ ]

addMAC

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

Add mac byte [ ].

Parameters:

key - the key

data - the data

Returns:

the byte [ ]

addMAC

public static byte[] addMAC(byte[] key,
                            byte[] data)

Add mac byte [ ].

Parameters:

key - the key

data - the data

Returns:

the byte [ ]

removeMAC

public static byte[] removeMAC(byte[] key,
                               byte[] data)

Check the MAC and return the verified content or null if the verification failed

Parameters:

key - the key

data - the data

Returns:

byte [ ]

removeMAC

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

Remove mac byte [ ].

Parameters:

key - the key

data - the data

Returns:

the byte [ ]

safeSipHash

public static long safeSipHash(long k0,
                               long k1,
                               byte[] msg)

Compute a safe SipHash of a given input by computing the forward hash, the hash of the reversed input and finally the hash of the two concatenated hashes.

This should prevent having meaningful collisions. If two contents have colliding hashes, this means that the concatenation of their forward and reverse hashes are collisions for SipHah, quite unlikely.

Parameters:

k0 - the k 0

k1 - the k 1

msg - the msg

Returns:

long

invert

public static byte[] invert(byte[] key)

Invert byte [ ].

Parameters:

key - the key

Returns:

the byte [ ]