org.bouncycastle.pqc.asn1.ParSet 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.asn1;

import org.bouncycastle.asn1.ASN1Encodable;
import org.bouncycastle.asn1.ASN1EncodableVector;
import org.bouncycastle.asn1.ASN1Integer;
import org.bouncycastle.asn1.ASN1Object;
import org.bouncycastle.asn1.ASN1Primitive;
import org.bouncycastle.asn1.ASN1Sequence;
import org.bouncycastle.asn1.DERSequence;
import org.bouncycastle.util.Arrays;

/**
 *  *  ParSet              ::= SEQUENCE {
 *      T               INTEGER
 *      h               SEQUENCE OF INTEGER
 *      w               SEQUENCE OF INTEGER
 *      K               SEQUENCE OF INTEGER
 *  }
 * 
 */
public class ParSet
    extends ASN1Object
{
    private int   t;
    private int[] h;
    private int[] w;
    private int[] k;

    private static int checkBigIntegerInIntRangeAndPositive(ASN1Encodable e)
    {
        ASN1Integer i = (ASN1Integer)e;
        int value = i.intValueExact();
        if (value <= 0)
        {
            throw new IllegalArgumentException("BigInteger not in Range: " + value);
        }
        return value;
    }

    private ParSet(ASN1Sequence seq)
    {
        if (seq.size() != 4)
        {
            throw new IllegalArgumentException("sie of seqOfParams = " + seq.size());
        }

        t = checkBigIntegerInIntRangeAndPositive(seq.getObjectAt(0));

        ASN1Sequence seqOfPSh = (ASN1Sequence)seq.getObjectAt(1);
        ASN1Sequence seqOfPSw = (ASN1Sequence)seq.getObjectAt(2);
        ASN1Sequence seqOfPSK = (ASN1Sequence)seq.getObjectAt(3);

        if ((seqOfPSh.size() != t) ||
            (seqOfPSw.size() != t) ||
            (seqOfPSK.size() != t))
        {
            throw new IllegalArgumentException("invalid size of sequences");
        }

        h = new int[seqOfPSh.size()];
        w = new int[seqOfPSw.size()];
        k = new int[seqOfPSK.size()];

        for (int i = 0; i < t; i++)
        {
            h[i] = checkBigIntegerInIntRangeAndPositive(seqOfPSh.getObjectAt(i));
            w[i] = checkBigIntegerInIntRangeAndPositive(seqOfPSw.getObjectAt(i));
            k[i] = checkBigIntegerInIntRangeAndPositive(seqOfPSK.getObjectAt(i));
        }
    }

    public ParSet(int t, int[] h, int[] w, int[] k)
    {
        this.t = t;
        this.h = h;
        this.w = w;
        this.k = k;
    }

    public static ParSet getInstance(Object o)
    {
        if (o instanceof ParSet)
        {
            return (ParSet)o;
        }
        else if (o != null)
        {
            return new ParSet(ASN1Sequence.getInstance(o));
        }

        return null;
    }

    public int getT()
    {
        return t;
    }

    public int[] getH()
    {
        return Arrays.clone(h);
    }

    public int[] getW()
    {
        return Arrays.clone(w);
    }

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

    public ASN1Primitive toASN1Primitive()
    {
        ASN1EncodableVector seqOfPSh = new ASN1EncodableVector();
        ASN1EncodableVector seqOfPSw = new ASN1EncodableVector();
        ASN1EncodableVector seqOfPSK = new ASN1EncodableVector();

        for (int i = 0; i < h.length; i++)
        {
            seqOfPSh.add(new ASN1Integer(h[i]));
            seqOfPSw.add(new ASN1Integer(w[i]));
            seqOfPSK.add(new ASN1Integer(k[i]));
        }

        ASN1EncodableVector v = new ASN1EncodableVector();

        v.add(new ASN1Integer(t));
        v.add(new DERSequence(seqOfPSh));
        v.add(new DERSequence(seqOfPSw));
        v.add(new DERSequence(seqOfPSK));

        return new DERSequence(v);
    }
}