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package org.spongycastle.pqc.asn1;
import org.spongycastle.asn1.ASN1EncodableVector;
import org.spongycastle.asn1.ASN1Integer;
import org.spongycastle.asn1.ASN1Object;
import org.spongycastle.asn1.ASN1ObjectIdentifier;
import org.spongycastle.asn1.ASN1OctetString;
import org.spongycastle.asn1.ASN1Primitive;
import org.spongycastle.asn1.ASN1Sequence;
import org.spongycastle.asn1.DEROctetString;
import org.spongycastle.asn1.DERSequence;
import org.spongycastle.pqc.crypto.rainbow.util.RainbowUtil;
/**
* This class implements an ASN.1 encoded Rainbow public key. The ASN.1 definition
* of this structure is:
* <pre>
* RainbowPublicKey ::= SEQUENCE {
* CHOICE
* {
* oid OBJECT IDENTIFIER -- OID identifying the algorithm
* version INTEGER -- 0
* }
* docLength Integer -- length of the code
* coeffquadratic SEQUENCE OF OCTET STRING -- quadratic (mixed) coefficients
* coeffsingular SEQUENCE OF OCTET STRING -- singular coefficients
* coeffscalar SEQUENCE OF OCTET STRING -- scalar coefficients
* }
* </pre>
*/
public class RainbowPublicKey
extends ASN1Object
{
private ASN1Integer version;
private ASN1ObjectIdentifier oid;
private ASN1Integer docLength;
private byte[][] coeffQuadratic;
private byte[][] coeffSingular;
private byte[] coeffScalar;
private RainbowPublicKey(ASN1Sequence seq)
{
// <oidString> or version
if (seq.getObjectAt(0) instanceof ASN1Integer)
{
version = ASN1Integer.getInstance(seq.getObjectAt(0));
}
else
{
oid = ASN1ObjectIdentifier.getInstance(seq.getObjectAt(0));
}
docLength = ASN1Integer.getInstance(seq.getObjectAt(1));
ASN1Sequence asnCoeffQuad = ASN1Sequence.getInstance(seq.getObjectAt(2));
coeffQuadratic = new byte[asnCoeffQuad.size()][];
for (int quadSize = 0; quadSize < asnCoeffQuad.size(); quadSize++)
{
coeffQuadratic[quadSize] = ASN1OctetString.getInstance(asnCoeffQuad.getObjectAt(quadSize)).getOctets();
}
ASN1Sequence asnCoeffSing = (ASN1Sequence)seq.getObjectAt(3);
coeffSingular = new byte[asnCoeffSing.size()][];
for (int singSize = 0; singSize < asnCoeffSing.size(); singSize++)
{
coeffSingular[singSize] = ASN1OctetString.getInstance(asnCoeffSing.getObjectAt(singSize)).getOctets();
}
ASN1Sequence asnCoeffScalar = (ASN1Sequence)seq.getObjectAt(4);
coeffScalar = ASN1OctetString.getInstance(asnCoeffScalar.getObjectAt(0)).getOctets();
}
public RainbowPublicKey(int docLength, short[][] coeffQuadratic, short[][] coeffSingular, short[] coeffScalar)
{
this.version = new ASN1Integer(0);
this.docLength = new ASN1Integer(docLength);
this.coeffQuadratic = RainbowUtil.convertArray(coeffQuadratic);
this.coeffSingular = RainbowUtil.convertArray(coeffSingular);
this.coeffScalar = RainbowUtil.convertArray(coeffScalar);
}
public static RainbowPublicKey getInstance(Object o)
{
if (o instanceof RainbowPublicKey)
{
return (RainbowPublicKey)o;
}
else if (o != null)
{
return new RainbowPublicKey(ASN1Sequence.getInstance(o));
}
return null;
}
public ASN1Integer getVersion()
{
return version;
}
/**
* @return the docLength
*/
public int getDocLength()
{
return this.docLength.getValue().intValue();
}
/**
* @return the coeffquadratic
*/
public short[][] getCoeffQuadratic()
{
return RainbowUtil.convertArray(coeffQuadratic);
}
/**
* @return the coeffsingular
*/
public short[][] getCoeffSingular()
{
return RainbowUtil.convertArray(coeffSingular);
}
/**
* @return the coeffscalar
*/
public short[] getCoeffScalar()
{
return RainbowUtil.convertArray(coeffScalar);
}
public ASN1Primitive toASN1Primitive()
{
ASN1EncodableVector v = new ASN1EncodableVector();
// encode <oidString> or version
if (version != null)
{
v.add(version);
}
else
{
v.add(oid);
}
// encode <docLength>
v.add(docLength);
// encode <coeffQuadratic>
ASN1EncodableVector asnCoeffQuad = new ASN1EncodableVector();
for (int i = 0; i < coeffQuadratic.length; i++)
{
asnCoeffQuad.add(new DEROctetString(coeffQuadratic[i]));
}
v.add(new DERSequence(asnCoeffQuad));
// encode <coeffSingular>
ASN1EncodableVector asnCoeffSing = new ASN1EncodableVector();
for (int i = 0; i < coeffSingular.length; i++)
{
asnCoeffSing.add(new DEROctetString(coeffSingular[i]));
}
v.add(new DERSequence(asnCoeffSing));
// encode <coeffScalar>
ASN1EncodableVector asnCoeffScalar = new ASN1EncodableVector();
asnCoeffScalar.add(new DEROctetString(coeffScalar));
v.add(new DERSequence(asnCoeffScalar));
return new DERSequence(v);
}
}
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