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package org.spongycastle.jcajce.provider.asymmetric.gost;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.math.BigInteger;
import org.spongycastle.asn1.ASN1ObjectIdentifier;
import org.spongycastle.asn1.ASN1Sequence;
import org.spongycastle.asn1.DEROctetString;
import org.spongycastle.asn1.cryptopro.CryptoProObjectIdentifiers;
import org.spongycastle.asn1.cryptopro.GOST3410PublicKeyAlgParameters;
import org.spongycastle.asn1.x509.AlgorithmIdentifier;
import org.spongycastle.asn1.x509.SubjectPublicKeyInfo;
import org.spongycastle.crypto.params.GOST3410PublicKeyParameters;
import org.spongycastle.jcajce.provider.asymmetric.util.KeyUtil;
import org.spongycastle.jce.interfaces.GOST3410Params;
import org.spongycastle.jce.interfaces.GOST3410PublicKey;
import org.spongycastle.jce.spec.GOST3410ParameterSpec;
import org.spongycastle.jce.spec.GOST3410PublicKeyParameterSetSpec;
import org.spongycastle.jce.spec.GOST3410PublicKeySpec;
public class BCGOST3410PublicKey
implements GOST3410PublicKey
{
static final long serialVersionUID = -6251023343619275990L;
private BigInteger y;
private transient GOST3410Params gost3410Spec;
BCGOST3410PublicKey(
GOST3410PublicKeySpec spec)
{
this.y = spec.getY();
this.gost3410Spec = new GOST3410ParameterSpec(new GOST3410PublicKeyParameterSetSpec(spec.getP(), spec.getQ(), spec.getA()));
}
BCGOST3410PublicKey(
GOST3410PublicKey key)
{
this.y = key.getY();
this.gost3410Spec = key.getParameters();
}
BCGOST3410PublicKey(
GOST3410PublicKeyParameters params,
GOST3410ParameterSpec spec)
{
this.y = params.getY();
this.gost3410Spec = spec;
}
BCGOST3410PublicKey(
BigInteger y,
GOST3410ParameterSpec gost3410Spec)
{
this.y = y;
this.gost3410Spec = gost3410Spec;
}
BCGOST3410PublicKey(
SubjectPublicKeyInfo info)
{
GOST3410PublicKeyAlgParameters params = new GOST3410PublicKeyAlgParameters((ASN1Sequence)info.getAlgorithmId().getParameters());
DEROctetString derY;
try
{
derY = (DEROctetString)info.parsePublicKey();
byte[] keyEnc = derY.getOctets();
byte[] keyBytes = new byte[keyEnc.length];
for (int i = 0; i != keyEnc.length; i++)
{
keyBytes[i] = keyEnc[keyEnc.length - 1 - i]; // was little endian
}
this.y = new BigInteger(1, keyBytes);
}
catch (IOException e)
{
throw new IllegalArgumentException("invalid info structure in GOST3410 public key");
}
this.gost3410Spec = GOST3410ParameterSpec.fromPublicKeyAlg(params);
}
public String getAlgorithm()
{
return "GOST3410";
}
public String getFormat()
{
return "X.509";
}
public byte[] getEncoded()
{
SubjectPublicKeyInfo info;
byte[] keyEnc = this.getY().toByteArray();
byte[] keyBytes;
if (keyEnc[0] == 0)
{
keyBytes = new byte[keyEnc.length - 1];
}
else
{
keyBytes = new byte[keyEnc.length];
}
for (int i = 0; i != keyBytes.length; i++)
{
keyBytes[i] = keyEnc[keyEnc.length - 1 - i]; // must be little endian
}
try
{
if (gost3410Spec instanceof GOST3410ParameterSpec)
{
if (gost3410Spec.getEncryptionParamSetOID() != null)
{
info = new SubjectPublicKeyInfo(new AlgorithmIdentifier(CryptoProObjectIdentifiers.gostR3410_94, new GOST3410PublicKeyAlgParameters(new ASN1ObjectIdentifier(gost3410Spec.getPublicKeyParamSetOID()), new ASN1ObjectIdentifier(gost3410Spec.getDigestParamSetOID()), new ASN1ObjectIdentifier(gost3410Spec.getEncryptionParamSetOID()))), new DEROctetString(keyBytes));
}
else
{
info = new SubjectPublicKeyInfo(new AlgorithmIdentifier(CryptoProObjectIdentifiers.gostR3410_94, new GOST3410PublicKeyAlgParameters(new ASN1ObjectIdentifier(gost3410Spec.getPublicKeyParamSetOID()), new ASN1ObjectIdentifier(gost3410Spec.getDigestParamSetOID()))), new DEROctetString(keyBytes));
}
}
else
{
info = new SubjectPublicKeyInfo(new AlgorithmIdentifier(CryptoProObjectIdentifiers.gostR3410_94), new DEROctetString(keyBytes));
}
return KeyUtil.getEncodedSubjectPublicKeyInfo(info);
}
catch (IOException e)
{
return null;
}
}
public GOST3410Params getParameters()
{
return gost3410Spec;
}
public BigInteger getY()
{
return y;
}
public String toString()
{
StringBuffer buf = new StringBuffer();
String nl = System.getProperty("line.separator");
buf.append("GOST3410 Public Key").append(nl);
buf.append(" y: ").append(this.getY().toString(16)).append(nl);
return buf.toString();
}
public boolean equals(Object o)
{
if (o instanceof BCGOST3410PublicKey)
{
BCGOST3410PublicKey other = (BCGOST3410PublicKey)o;
return this.y.equals(other.y) && this.gost3410Spec.equals(other.gost3410Spec);
}
return false;
}
public int hashCode()
{
return y.hashCode() ^ gost3410Spec.hashCode();
}
private void readObject(
ObjectInputStream in)
throws IOException, ClassNotFoundException
{
in.defaultReadObject();
String publicKeyParamSetOID = (String)in.readObject();
if (publicKeyParamSetOID != null)
{
this.gost3410Spec = new GOST3410ParameterSpec(publicKeyParamSetOID, (String)in.readObject(), (String)in.readObject());
}
else
{
this.gost3410Spec = new GOST3410ParameterSpec(new GOST3410PublicKeyParameterSetSpec((BigInteger)in.readObject(), (BigInteger)in.readObject(), (BigInteger)in.readObject()));
in.readObject();
in.readObject();
}
}
private void writeObject(
ObjectOutputStream out)
throws IOException
{
out.defaultWriteObject();
if (gost3410Spec.getPublicKeyParamSetOID() != null)
{
out.writeObject(gost3410Spec.getPublicKeyParamSetOID());
out.writeObject(gost3410Spec.getDigestParamSetOID());
out.writeObject(gost3410Spec.getEncryptionParamSetOID());
}
else
{
out.writeObject(null);
out.writeObject(gost3410Spec.getPublicKeyParameters().getP());
out.writeObject(gost3410Spec.getPublicKeyParameters().getQ());
out.writeObject(gost3410Spec.getPublicKeyParameters().getA());
out.writeObject(gost3410Spec.getDigestParamSetOID());
out.writeObject(gost3410Spec.getEncryptionParamSetOID());
}
}
}
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