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package org.spongycastle.asn1.ua;
import org.spongycastle.asn1.ASN1EncodableVector;
import org.spongycastle.asn1.ASN1Integer;
import org.spongycastle.asn1.ASN1Object;
import org.spongycastle.asn1.ASN1Primitive;
import org.spongycastle.asn1.ASN1Sequence;
import org.spongycastle.asn1.DERSequence;
public class DSTU4145BinaryField
extends ASN1Object
{
private int m, k, j, l;
private DSTU4145BinaryField(ASN1Sequence seq)
{
m = ASN1Integer.getInstance(seq.getObjectAt(0)).getPositiveValue().intValue();
if (seq.getObjectAt(1) instanceof ASN1Integer)
{
k = ((ASN1Integer)seq.getObjectAt(1)).getPositiveValue().intValue();
}
else if (seq.getObjectAt(1) instanceof ASN1Sequence)
{
ASN1Sequence coefs = ASN1Sequence.getInstance(seq.getObjectAt(1));
k = ASN1Integer.getInstance(coefs.getObjectAt(0)).getPositiveValue().intValue();
j = ASN1Integer.getInstance(coefs.getObjectAt(1)).getPositiveValue().intValue();
l = ASN1Integer.getInstance(coefs.getObjectAt(2)).getPositiveValue().intValue();
}
else
{
throw new IllegalArgumentException("object parse error");
}
}
public static DSTU4145BinaryField getInstance(Object obj)
{
if (obj instanceof DSTU4145BinaryField)
{
return (DSTU4145BinaryField)obj;
}
if (obj != null)
{
return new DSTU4145BinaryField(ASN1Sequence.getInstance(obj));
}
return null;
}
public DSTU4145BinaryField(int m, int k1, int k2, int k3)
{
this.m = m;
this.k = k1;
this.j = k2;
this.l = k3;
}
public int getM()
{
return m;
}
public int getK1()
{
return k;
}
public int getK2()
{
return j;
}
public int getK3()
{
return l;
}
public DSTU4145BinaryField(int m, int k)
{
this(m, k, 0, 0);
}
/**
* BinaryField ::= SEQUENCE {
* M INTEGER,
* CHOICE {Trinomial, Pentanomial}
* Trinomial::= INTEGER
* Pentanomial::= SEQUENCE {
* k INTEGER,
* j INTEGER,
* l INTEGER}
*/
public ASN1Primitive toASN1Primitive()
{
ASN1EncodableVector v = new ASN1EncodableVector();
v.add(new ASN1Integer(m));
if (j == 0) //Trinomial
{
v.add(new ASN1Integer(k));
}
else
{
ASN1EncodableVector coefs = new ASN1EncodableVector();
coefs.add(new ASN1Integer(k));
coefs.add(new ASN1Integer(j));
coefs.add(new ASN1Integer(l));
v.add(new DERSequence(coefs));
}
return new DERSequence(v);
}
}
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