org.bouncycastle.pqc.crypto.lms.LMSKeyPairGenerator Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of bcprov-jdk15to18 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 1.5 to JDK 1.8.

There is a newer version: 1.79

Show newest version

package org.bouncycastle.pqc.crypto.lms;

import java.security.SecureRandom;

import org.bouncycastle.crypto.AsymmetricCipherKeyPair;
import org.bouncycastle.crypto.AsymmetricCipherKeyPairGenerator;
import org.bouncycastle.crypto.KeyGenerationParameters;

public class LMSKeyPairGenerator
    implements AsymmetricCipherKeyPairGenerator
{
    LMSKeyGenerationParameters param;

    public void init(KeyGenerationParameters param)
    {
        this.param = (LMSKeyGenerationParameters)param;
    }

    public AsymmetricCipherKeyPair generateKeyPair()
    {
        SecureRandom source = param.getRandom();

        byte[] I = new byte[16];
        source.nextBytes(I);

        byte[] rootSecret = new byte[32];
        source.nextBytes(rootSecret);

        LMSPrivateKeyParameters privKey = LMS.generateKeys(param.getParameters().getLMSigParam(), param.getParameters().getLMOTSParam(), 0, I, rootSecret);

        return new AsymmetricCipherKeyPair(privKey.getPublicKey(), privKey);
    }
}