org.bouncycastle.pqc.crypto.newhope.NHExchangePairGenerator Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of bcprov-ext-debug-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 Java 1.8 and later with debug enabled.

The newest version!

package org.bouncycastle.pqc.crypto.newhope;

import java.security.SecureRandom;

import org.bouncycastle.crypto.params.AsymmetricKeyParameter;
import org.bouncycastle.pqc.crypto.ExchangePair;
import org.bouncycastle.pqc.crypto.ExchangePairGenerator;

public class NHExchangePairGenerator
    implements ExchangePairGenerator
{
    private final SecureRandom random;

    public NHExchangePairGenerator(SecureRandom random)
    {
        this.random = random;
    }

    public ExchangePair GenerateExchange(AsymmetricKeyParameter senderPublicKey)
    {
        return generateExchange(senderPublicKey);
    }

    public ExchangePair generateExchange(AsymmetricKeyParameter senderPublicKey)
    {
        NHPublicKeyParameters pubKey = (NHPublicKeyParameters)senderPublicKey;

        byte[] sharedValue = new byte[NewHope.AGREEMENT_SIZE];
        byte[] publicKeyValue = new byte[NewHope.SENDB_BYTES];

        NewHope.sharedB(random, sharedValue, publicKeyValue, pubKey.pubData);

        return new ExchangePair(new NHPublicKeyParameters(publicKeyValue), sharedValue);
    }
}