de.flexiprovider.pqc.hbc.cmss
Class CRNodeCalc

java.lang.Object
  |
  +--de.flexiprovider.pqc.hbc.cmss.CRNodeCalc

All Implemented Interfaces:

NodeCalc

public class CRNodeCalc

extends java.lang.Object

implements NodeCalc

This class provides an implementation of the NodeCalc interface, that calculates the nodes in the classical way without use of SPR.

Constructor Summary

CRNodeCalc(MessageDigest md)
Constructs a new CRNodeCalc object, that uses the given MessageDigest to calculate the nodes.

Method Summary

byte[]	computeParent(byte[] leftNode, byte[] rightNode, int height) Calculates the parent node of two children.
byte[]	getLeaf(byte[] vkey) Calculates the leaf of a tree from the verification key.

Methods inherited from class java.lang.Object

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

Constructor Detail

CRNodeCalc

public CRNodeCalc(MessageDigest md)

Constructs a new CRNodeCalc object, that uses the given MessageDigest to calculate the nodes.

Parameters:

md - the MessageDigest to use

Method Detail

computeParent

public byte[] computeParent(byte[] leftNode,
                            byte[] rightNode,
                            int height)

Description copied from interface: NodeCalc

Calculates the parent node of two children.

Specified by:

computeParent in interface NodeCalc

Following copied from interface: de.flexiprovider.pqc.hbc.cmss.NodeCalc

Parameters:

leftNode - the left child

rightNode - the right child

height - the height of the children

Returns:

the parent node

getLeaf

public byte[] getLeaf(byte[] vkey)

Description copied from interface: NodeCalc

Calculates the leaf of a tree from the verification key.

Specified by:

getLeaf in interface NodeCalc

Following copied from interface: de.flexiprovider.pqc.hbc.cmss.NodeCalc

Parameters:

vkey - the verification key to calculate the leaf from.

Returns:

the leaf