eu.mais_h.mathsync.digest

Interface Digester

All Known Implementing Classes:

Sha1Digester

public interface Digester

Creates digests of items serialized as byte arrays.

Method Summary

Methods

Modifier and Type	Method and Description
byte[]	digest(byte[] source) Digests an item serialized as an array of bytes.

Method Detail

digest

byte[] digest(byte[] source)

Digests an item serialized as an array of bytes.

Any byte array value must be accepted and have a non null return value: for any a, digest(a) != null.

All valid inputs should produce in output an array of the same size:for any a1 and a2, digest(a1).length == digest(a2).length.

The output must be consistent, an identical output should be returned if called twice on the same array: for any a1 and a2, Arrays.equals(a1, a2) implies Arrays.equals(digest(a1), digest(a2)).

In addition to those constrains, it is recommended that it has the properties of a cryptographic hash function.

Parameters:

source - the item serialized as an array of bytes.

Returns:

the message digest of the item.

Throws:

IllegalArgumentException - if the input array is null.