org.bouncycastle.pqc.crypto.picnic.LowmcConstantsL5 Maven / Gradle / Ivy

Show more of this group Show more artifacts with this name
Show all versions of bcprov-jdk18on Show documentation

The Bouncy Castle Crypto package is a Java implementation of cryptographic algorithms. This jar contains JCE provider and lightweight API for the Bouncy Castle Cryptography APIs for JDK 1.8 and up.

There is a newer version: 1.78.1

Show newest version

package org.bouncycastle.pqc.crypto.picnic;

import java.io.DataInputStream;
import java.io.IOException;
import java.util.zip.GZIPInputStream;

import org.bouncycastle.util.Exceptions;

public class LowmcConstantsL5
    extends LowmcConstants
{
    LowmcConstantsL5()
    {
        // load a properties file
        try
        {
            DataInputStream input = new DataInputStream(new GZIPInputStream(LowmcConstants.class.getResourceAsStream("lowmcL5.bin.properties")));

            linearMatrices = readArray(input);
            roundConstants = readArray(input);
            keyMatrices = readArray(input);

            linearMatrices_full = readArray(input);
            keyMatrices_full = readArray(input);
            keyMatrices_inv = readArray(input);
            linearMatrices_inv = readArray(input);
            roundConstants_full = readArray(input);
        }
        catch (IOException e)
        {
            throw Exceptions.illegalStateException("unable to load Picnic properties: " + e.getMessage(), e);
        }
        // Parameters for security level L5
        // Block/key size: 256
        // Rounds: 38
//        linearMatrices = ReadFromProperty(props, "linearMatrices", 311296);
//        roundConstants = ReadFromProperty(props, "roundConstants", 1216);
//        keyMatrices = ReadFromProperty(props, "keyMatrices", 319488);

        LMatrix = new KMatrices(38, 256, 8, linearMatrices);
        KMatrix = new KMatrices(39, 256, 8, keyMatrices);
        RConstants = new KMatrices(38, 1, 8, roundConstants);

        // Parameters for security level L5, full nonlinear layer
        // Block/key size: 255
        // S-boxes: 85
        // Rounds: 4
//        linearMatrices_full = ReadFromProperty(props, "linearMatrices_full", 32768);
//        linearMatrices_inv = ReadFromProperty(props, "linearMatrices_inv", 32768);
//        roundConstants_full = ReadFromProperty(props, "roundConstants_full", 128);
//        keyMatrices_full = ReadFromProperty(props, "keyMatrices_full", 40960);
//        keyMatrices_inv = ReadFromProperty(props, "keyMatrices_inv", 8160);

        LMatrix_full = new KMatrices(4, 255, 8, linearMatrices_full);
        LMatrix_inv = new KMatrices(4, 255, 8, linearMatrices_inv);
        KMatrix_full = new KMatrices(5, 255, 8, keyMatrices_full);
        KMatrix_inv = new KMatrices(1, 255, 8, keyMatrices_inv);
        RConstants_full = new KMatrices(4, 1, 8, roundConstants_full);
    }
}