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package io.gatling.recorder.internal.bouncycastle.pqc.jcajce.provider.picnic;

import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.security.PublicKey;

import io.gatling.recorder.internal.bouncycastle.asn1.x509.SubjectPublicKeyInfo;
import io.gatling.recorder.internal.bouncycastle.pqc.crypto.picnic.PicnicPublicKeyParameters;
import io.gatling.recorder.internal.bouncycastle.pqc.crypto.util.PublicKeyFactory;
import io.gatling.recorder.internal.bouncycastle.pqc.crypto.util.SubjectPublicKeyInfoFactory;
import io.gatling.recorder.internal.bouncycastle.pqc.jcajce.interfaces.PicnicKey;
import io.gatling.recorder.internal.bouncycastle.pqc.jcajce.spec.PicnicParameterSpec;
import io.gatling.recorder.internal.bouncycastle.util.Arrays;

public class BCPicnicPublicKey
    implements PublicKey, PicnicKey
{
    private static final long serialVersionUID = 1L;

    private transient PicnicPublicKeyParameters params;

    public BCPicnicPublicKey(
        PicnicPublicKeyParameters params)
    {
        this.params = params;
    }

    public BCPicnicPublicKey(SubjectPublicKeyInfo keyInfo)
        throws IOException
    {
        init(keyInfo);
    }

    private void init(SubjectPublicKeyInfo keyInfo)
        throws IOException
    {
        this.params = (PicnicPublicKeyParameters) PublicKeyFactory.createKey(keyInfo);
    }

    /**
     * Compare this Picnic public key with another object.
     *
     * @param o the other object
     * @return the result of the comparison
     */
    public boolean equals(Object o)
    {
        if (o == this)
        {
            return true;
        }

        if (o instanceof BCPicnicPublicKey)
        {
            BCPicnicPublicKey otherKey = (BCPicnicPublicKey)o;

            return Arrays.areEqual(params.getEncoded(), otherKey.params.getEncoded());
        }

        return false;
    }

    public int hashCode()
    {
        return Arrays.hashCode(params.getEncoded());
    }

    /**
     * @return name of the algorithm - "Picnic"
     */
    public final String getAlgorithm()
    {
        return "Picnic";
    }

    public byte[] getEncoded()
    {
        try
        {
            SubjectPublicKeyInfo pki = SubjectPublicKeyInfoFactory.createSubjectPublicKeyInfo(params);

            return pki.getEncoded();
        }
        catch (IOException e)
        {
            return null;
        }
    }

    public String getFormat()
    {
        return "X.509";
    }

    public PicnicParameterSpec getParameterSpec()
    {
        return PicnicParameterSpec.fromName(params.getParameters().getName());
    }

    PicnicPublicKeyParameters getKeyParams()
    {
        return params;
    }

    private void readObject(
        ObjectInputStream in)
        throws IOException, ClassNotFoundException
    {
        in.defaultReadObject();

        byte[] enc = (byte[])in.readObject();

        init(SubjectPublicKeyInfo.getInstance(enc));
    }

    private void writeObject(
        ObjectOutputStream out)
        throws IOException
    {
        out.defaultWriteObject();

        out.writeObject(this.getEncoded());
    }
}