org.bouncycastle.pqc.crypto.crystals.dilithium.DilithiumPrivateKeyParameters 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.crystals.dilithium;

import org.bouncycastle.util.Arrays;

public class DilithiumPrivateKeyParameters
    extends DilithiumKeyParameters
{
    final byte[] rho;
    final byte[] k;
    final byte[] tr;
    final byte[] s1;
    final byte[] s2;
    final byte[] t0;

    private final byte[] t1;

    public DilithiumPrivateKeyParameters(DilithiumParameters params, byte[] rho, byte[] K, byte[] tr, byte[] s1, byte[] s2, byte[] t0, byte[] t1)
    {
        super(true, params);
        this.rho = Arrays.clone(rho);
        this.k = Arrays.clone(K);
        this.tr = Arrays.clone(tr);
        this.s1 = Arrays.clone(s1);
        this.s2 = Arrays.clone(s2);
        this.t0 = Arrays.clone(t0);
        this.t1 = Arrays.clone(t1);
    }

    public DilithiumPrivateKeyParameters(DilithiumParameters params, byte[] encoding, DilithiumPublicKeyParameters pubKey)
    {
        super(true, params);

        DilithiumEngine eng = params.getEngine(null);
        int index = 0;
        this.rho = Arrays.copyOfRange(encoding, 0, DilithiumEngine.SeedBytes); index += DilithiumEngine.SeedBytes;
        this.k = Arrays.copyOfRange(encoding, index, index + DilithiumEngine.SeedBytes); index += DilithiumEngine.SeedBytes;
        this.tr = Arrays.copyOfRange(encoding, index, index + DilithiumEngine.TrBytes); index += DilithiumEngine.TrBytes;
        int delta = eng.getDilithiumL() * eng.getDilithiumPolyEtaPackedBytes();
        this.s1 = Arrays.copyOfRange(encoding, index, index + delta); index += delta;
        delta = eng.getDilithiumK() * eng.getDilithiumPolyEtaPackedBytes();
        this.s2 = Arrays.copyOfRange(encoding, index, index + delta); index += delta;
        delta = eng.getDilithiumK() * DilithiumEngine.DilithiumPolyT0PackedBytes;
        this.t0 = Arrays.copyOfRange(encoding, index, index + delta); index += delta;

        if (pubKey != null)
        {
            this.t1 = pubKey.getT1();
        }
        else
        {
            this.t1 = null;
        }
    }

    public byte[] getEncoded()
    {
        return Arrays.concatenate(new byte[][]{ rho, k, tr, s1, s2, t0 });
    }

    public byte[] getK()
    {
        return Arrays.clone(k);
    }

    /** @deprecated Use {@link #getEncoded()} instead. */
    public byte[] getPrivateKey()
    {
        return getEncoded();
    }

    public byte[] getPublicKey()
    {
        return DilithiumPublicKeyParameters.getEncoded(rho, t1);
    }

    public DilithiumPublicKeyParameters getPublicKeyParameters()
    {
        return new DilithiumPublicKeyParameters(getParameters(), rho, t1);
    }

    public byte[] getRho()
    {
        return Arrays.clone(rho);
    }

    public byte[] getS1()
    {
        return Arrays.clone(s1);
    }

    public byte[] getS2()
    {
        return Arrays.clone(s2);
    }

    public byte[] getT0()
    {
        return Arrays.clone(t0);
    }

    public byte[] getT1()
    {
        return Arrays.clone(t1);
    }

    public byte[] getTr()
    {
        return Arrays.clone(tr);
    }
}