package org.bouncycastle.jce.provider;
import org.bouncycastle.asn1.ASN1Sequence;
import org.bouncycastle.asn1.DEREncodable;
import org.bouncycastle.asn1.DERObjectIdentifier;
import org.bouncycastle.asn1.DEROctetString;
import org.bouncycastle.asn1.cryptopro.CryptoProObjectIdentifiers;
import org.bouncycastle.asn1.cryptopro.GOST3410PublicKeyAlgParameters;
import org.bouncycastle.asn1.pkcs.PrivateKeyInfo;
import org.bouncycastle.asn1.x509.AlgorithmIdentifier;
import org.bouncycastle.crypto.params.GOST3410PrivateKeyParameters;
import org.bouncycastle.jce.interfaces.GOST3410Params;
import org.bouncycastle.jce.interfaces.GOST3410PrivateKey;
import org.bouncycastle.jce.interfaces.PKCS12BagAttributeCarrier;
import org.bouncycastle.jce.spec.GOST3410ParameterSpec;
import org.bouncycastle.jce.spec.GOST3410PrivateKeySpec;
import org.bouncycastle.jce.spec.GOST3410PublicKeyParameterSetSpec;
import java.math.BigInteger;
import java.util.Enumeration;
public class JDKGOST3410PrivateKey
implements GOST3410PrivateKey, PKCS12BagAttributeCarrier
{
BigInteger x;
GOST3410Params gost3410Spec;
private PKCS12BagAttributeCarrier attrCarrier = new PKCS12BagAttributeCarrierImpl();
protected JDKGOST3410PrivateKey()
{
}
JDKGOST3410PrivateKey(
GOST3410PrivateKey key)
{
this.x = key.getX();
this.gost3410Spec = key.getParameters();
}
JDKGOST3410PrivateKey(
GOST3410PrivateKeySpec spec)
{
this.x = spec.getX();
this.gost3410Spec = new GOST3410ParameterSpec(new GOST3410PublicKeyParameterSetSpec(spec.getP(), spec.getQ(), spec.getA()));
}
JDKGOST3410PrivateKey(
PrivateKeyInfo info)
{
GOST3410PublicKeyAlgParameters params = new GOST3410PublicKeyAlgParameters((ASN1Sequence)info.getAlgorithmId().getParameters());
DEROctetString derX = (DEROctetString)info.getPrivateKey();
byte[] keyEnc = derX.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.x = new BigInteger(1, keyBytes);
this.gost3410Spec = GOST3410ParameterSpec.fromPublicKeyAlg(params);
}
JDKGOST3410PrivateKey(
GOST3410PrivateKeyParameters params,
GOST3410ParameterSpec spec)
{
this.x = params.getX();
this.gost3410Spec = spec;
if (spec == null)
{
throw new IllegalArgumentException("spec is null");
}
}
public String getAlgorithm()
{
return "GOST3410";
}
/**
* return the encoding format we produce in getEncoded().
*
* @return the string "PKCS#8"
*/
public String getFormat()
{
return "PKCS#8";
}
/**
* Return a PKCS8 representation of the key. The sequence returned
* represents a full PrivateKeyInfo object.
*
* @return a PKCS8 representation of the key.
*/
public byte[] getEncoded()
{
PrivateKeyInfo info;
byte[] keyEnc = this.getX().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
}
if (gost3410Spec instanceof GOST3410ParameterSpec)
{
info = new PrivateKeyInfo(new AlgorithmIdentifier(CryptoProObjectIdentifiers.gostR3410_94, new GOST3410PublicKeyAlgParameters(new DERObjectIdentifier(gost3410Spec.getPublicKeyParamSetOID()), new DERObjectIdentifier(gost3410Spec.getDigestParamSetOID())).getDERObject()), new DEROctetString(keyBytes));
}
else
{
info = new PrivateKeyInfo(new AlgorithmIdentifier(CryptoProObjectIdentifiers.gostR3410_94), new DEROctetString(keyBytes));
}
return info.getDEREncoded();
}
public GOST3410Params getParameters()
{
return gost3410Spec;
}
public BigInteger getX()
{
return x;
}
public void setBagAttribute(
DERObjectIdentifier oid,
DEREncodable attribute)
{
attrCarrier.setBagAttribute(oid, attribute);
}
public DEREncodable getBagAttribute(
DERObjectIdentifier oid)
{
return attrCarrier.getBagAttribute(oid);
}
public Enumeration getBagAttributeKeys()
{
return attrCarrier.getBagAttributeKeys();
}
}