com.guardtime.ksi.tree

Class Util

java.lang.Object

com.guardtime.ksi.tree.Util

public final class Util
extends Object

A collection of miscellaneous, commonly used utility functions and constants.

Field Summary

Fields

Modifier and Type	Field and Description
static HashAlgorithm	DEFAULT_AGGREGATION_ALGORITHM
static int	MAXIMUM_LEVEL

Method Summary

Modifier and Type	Method and Description
static DataHash	hash(HashAlgorithm hashAlgorithm, byte[] left, byte[] right, long level) Calculates a data hash using the following formula: H(left||right||Util.encodeUnsignedLong(level)) where H is a cryptographic hash function defined by hashAlgorithm.

Methods inherited from class java.lang.Object

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

Field Detail

DEFAULT_AGGREGATION_ALGORITHM

public static final HashAlgorithm DEFAULT_AGGREGATION_ALGORITHM

MAXIMUM_LEVEL

public static final int MAXIMUM_LEVEL

See Also:

Constant Field Values

Method Detail

hash

public static DataHash hash(HashAlgorithm hashAlgorithm,
                            byte[] left,
                            byte[] right,
                            long level)
                     throws HashException

Calculates a data hash using the following formula: H(left||right||Util.encodeUnsignedLong(level)) where H is a cryptographic hash function defined by hashAlgorithm.

Throws:

HashException