org.bouncycastle.jcajce.provider.asymmetric.dstu.BCDSTU4145PrivateKey Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of bcprov-debug-jdk15to18 Show documentation
Show all versions of bcprov-debug-jdk15to18 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 JDK 1.5 to JDK 1.8.
package org.bouncycastle.jcajce.provider.asymmetric.dstu;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.math.BigInteger;
import java.security.interfaces.ECPrivateKey;
import java.security.spec.ECParameterSpec;
import java.security.spec.ECPrivateKeySpec;
import java.security.spec.EllipticCurve;
import java.util.Enumeration;
import org.bouncycastle.asn1.ASN1BitString;
import org.bouncycastle.asn1.ASN1Encodable;
import org.bouncycastle.asn1.ASN1Encoding;
import org.bouncycastle.asn1.ASN1Integer;
import org.bouncycastle.asn1.ASN1ObjectIdentifier;
import org.bouncycastle.asn1.ASN1Primitive;
import org.bouncycastle.asn1.ASN1Sequence;
import org.bouncycastle.asn1.DERNull;
import org.bouncycastle.asn1.pkcs.PrivateKeyInfo;
import org.bouncycastle.asn1.ua.DSTU4145BinaryField;
import org.bouncycastle.asn1.ua.DSTU4145ECBinary;
import org.bouncycastle.asn1.ua.DSTU4145NamedCurves;
import org.bouncycastle.asn1.ua.DSTU4145Params;
import org.bouncycastle.asn1.ua.DSTU4145PointEncoder;
import org.bouncycastle.asn1.ua.UAObjectIdentifiers;
import org.bouncycastle.asn1.x509.AlgorithmIdentifier;
import org.bouncycastle.asn1.x509.SubjectPublicKeyInfo;
import org.bouncycastle.asn1.x9.X962Parameters;
import org.bouncycastle.asn1.x9.X9ECParameters;
import org.bouncycastle.asn1.x9.X9ECPoint;
import org.bouncycastle.asn1.x9.X9ObjectIdentifiers;
import org.bouncycastle.crypto.params.ECDomainParameters;
import org.bouncycastle.crypto.params.ECPrivateKeyParameters;
import org.bouncycastle.jcajce.provider.asymmetric.util.EC5Util;
import org.bouncycastle.jcajce.provider.asymmetric.util.ECUtil;
import org.bouncycastle.jcajce.provider.asymmetric.util.PKCS12BagAttributeCarrierImpl;
import org.bouncycastle.jce.interfaces.ECPointEncoder;
import org.bouncycastle.jce.interfaces.PKCS12BagAttributeCarrier;
import org.bouncycastle.jce.provider.BouncyCastleProvider;
import org.bouncycastle.jce.spec.ECNamedCurveParameterSpec;
import org.bouncycastle.jce.spec.ECNamedCurveSpec;
import org.bouncycastle.math.ec.ECCurve;
public class BCDSTU4145PrivateKey
implements ECPrivateKey, org.bouncycastle.jce.interfaces.ECPrivateKey, PKCS12BagAttributeCarrier, ECPointEncoder
{
static final long serialVersionUID = 7245981689601667138L;
private String algorithm = "DSTU4145";
private boolean withCompression;
private transient BigInteger d;
private transient ECParameterSpec ecSpec;
private transient ASN1BitString publicKey;
private transient PKCS12BagAttributeCarrierImpl attrCarrier = new PKCS12BagAttributeCarrierImpl();
protected BCDSTU4145PrivateKey()
{
}
public BCDSTU4145PrivateKey(
ECPrivateKey key)
{
this.d = key.getS();
this.algorithm = key.getAlgorithm();
this.ecSpec = key.getParams();
}
public BCDSTU4145PrivateKey(
org.bouncycastle.jce.spec.ECPrivateKeySpec spec)
{
this.d = spec.getD();
if (spec.getParams() != null) // can be null if implicitlyCA
{
ECCurve curve = spec.getParams().getCurve();
EllipticCurve ellipticCurve;
ellipticCurve = EC5Util.convertCurve(curve, spec.getParams().getSeed());
this.ecSpec = EC5Util.convertSpec(ellipticCurve, spec.getParams());
}
else
{
this.ecSpec = null;
}
}
public BCDSTU4145PrivateKey(
ECPrivateKeySpec spec)
{
this.d = spec.getS();
this.ecSpec = spec.getParams();
}
public BCDSTU4145PrivateKey(
BCDSTU4145PrivateKey key)
{
this.d = key.d;
this.ecSpec = key.ecSpec;
this.withCompression = key.withCompression;
this.attrCarrier = key.attrCarrier;
this.publicKey = key.publicKey;
}
public BCDSTU4145PrivateKey(
String algorithm,
ECPrivateKeyParameters params,
BCDSTU4145PublicKey pubKey,
ECParameterSpec spec)
{
ECDomainParameters dp = params.getParameters();
this.algorithm = algorithm;
this.d = params.getD();
if (spec == null)
{
EllipticCurve ellipticCurve = EC5Util.convertCurve(dp.getCurve(), dp.getSeed());
this.ecSpec = new ECParameterSpec(
ellipticCurve,
EC5Util.convertPoint(dp.getG()),
dp.getN(),
dp.getH().intValue());
}
else
{
this.ecSpec = spec;
}
publicKey = getPublicKeyDetails(pubKey);
}
public BCDSTU4145PrivateKey(
String algorithm,
ECPrivateKeyParameters params,
BCDSTU4145PublicKey pubKey,
org.bouncycastle.jce.spec.ECParameterSpec spec)
{
ECDomainParameters dp = params.getParameters();
this.algorithm = algorithm;
this.d = params.getD();
if (spec == null)
{
EllipticCurve ellipticCurve = EC5Util.convertCurve(dp.getCurve(), dp.getSeed());
this.ecSpec = new ECParameterSpec(
ellipticCurve,
EC5Util.convertPoint(dp.getG()),
dp.getN(),
dp.getH().intValue());
}
else
{
EllipticCurve ellipticCurve = EC5Util.convertCurve(spec.getCurve(), spec.getSeed());
this.ecSpec = new ECParameterSpec(
ellipticCurve,
EC5Util.convertPoint(spec.getG()),
spec.getN(),
spec.getH().intValue());
}
publicKey = getPublicKeyDetails(pubKey);
}
public BCDSTU4145PrivateKey(
String algorithm,
ECPrivateKeyParameters params)
{
this.algorithm = algorithm;
this.d = params.getD();
this.ecSpec = null;
}
BCDSTU4145PrivateKey(
PrivateKeyInfo info)
throws IOException
{
populateFromPrivKeyInfo(info);
}
private void populateFromPrivKeyInfo(PrivateKeyInfo info)
throws IOException
{
X962Parameters params = X962Parameters.getInstance(info.getPrivateKeyAlgorithm().getParameters());
if (params.isNamedCurve())
{
ASN1ObjectIdentifier oid = ASN1ObjectIdentifier.getInstance(params.getParameters());
X9ECParameters ecP = ECUtil.getNamedCurveByOid(oid);
if (ecP == null) // DSTU Curve
{
ECDomainParameters gParam = DSTU4145NamedCurves.getByOID(oid);
EllipticCurve ellipticCurve = EC5Util.convertCurve(gParam.getCurve(), gParam.getSeed());
ecSpec = new ECNamedCurveSpec(
oid.getId(),
ellipticCurve,
EC5Util.convertPoint(gParam.getG()),
gParam.getN(),
gParam.getH());
}
else
{
EllipticCurve ellipticCurve = EC5Util.convertCurve(ecP.getCurve(), ecP.getSeed());
ecSpec = new ECNamedCurveSpec(
ECUtil.getCurveName(oid),
ellipticCurve,
EC5Util.convertPoint(ecP.getG()),
ecP.getN(),
ecP.getH());
}
}
else if (params.isImplicitlyCA())
{
ecSpec = null;
}
else
{
ASN1Sequence seq = ASN1Sequence.getInstance(params.getParameters());
if (seq.getObjectAt(0) instanceof ASN1Integer)
{
X9ECParameters ecP = X9ECParameters.getInstance(params.getParameters());
EllipticCurve ellipticCurve = EC5Util.convertCurve(ecP.getCurve(), ecP.getSeed());
this.ecSpec = new ECParameterSpec(
ellipticCurve,
EC5Util.convertPoint(ecP.getG()),
ecP.getN(),
ecP.getH().intValue());
}
else
{
DSTU4145Params dstuParams = DSTU4145Params.getInstance(seq);
org.bouncycastle.jce.spec.ECParameterSpec spec;
if (dstuParams.isNamedCurve())
{
ASN1ObjectIdentifier curveOid = dstuParams.getNamedCurve();
ECDomainParameters ecP = DSTU4145NamedCurves.getByOID(curveOid);
spec = new ECNamedCurveParameterSpec(curveOid.getId(), ecP.getCurve(), ecP.getG(), ecP.getN(), ecP.getH(), ecP.getSeed());
}
else
{
DSTU4145ECBinary binary = dstuParams.getECBinary();
byte[] b_bytes = binary.getB();
if (info.getPrivateKeyAlgorithm().getAlgorithm().equals(UAObjectIdentifiers.dstu4145le))
{
reverseBytes(b_bytes);
}
DSTU4145BinaryField field = binary.getField();
ECCurve curve = new ECCurve.F2m(field.getM(), field.getK1(), field.getK2(), field.getK3(), binary.getA(), new BigInteger(1, b_bytes));
byte[] g_bytes = binary.getG();
if (info.getPrivateKeyAlgorithm().getAlgorithm().equals(UAObjectIdentifiers.dstu4145le))
{
reverseBytes(g_bytes);
}
spec = new org.bouncycastle.jce.spec.ECParameterSpec(curve, DSTU4145PointEncoder.decodePoint(curve, g_bytes), binary.getN());
}
EllipticCurve ellipticCurve = EC5Util.convertCurve(spec.getCurve(), spec.getSeed());
this.ecSpec = new ECParameterSpec(
ellipticCurve,
EC5Util.convertPoint(spec.getG()),
spec.getN(),
spec.getH().intValue());
}
}
ASN1Encodable privKey = info.parsePrivateKey();
if (privKey instanceof ASN1Integer)
{
ASN1Integer derD = ASN1Integer.getInstance(privKey);
this.d = derD.getValue();
}
else
{
org.bouncycastle.asn1.sec.ECPrivateKey ec = org.bouncycastle.asn1.sec.ECPrivateKey.getInstance(privKey);
this.d = ec.getKey();
this.publicKey = ec.getPublicKey();
}
}
private void reverseBytes(byte[] bytes)
{
byte tmp;
for (int i = 0; i < bytes.length / 2; i++)
{
tmp = bytes[i];
bytes[i] = bytes[bytes.length - 1 - i];
bytes[bytes.length - 1 - i] = tmp;
}
}
public String getAlgorithm()
{
return algorithm;
}
/**
* 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()
{
X962Parameters params;
int orderBitLength;
if (ecSpec instanceof ECNamedCurveSpec)
{
ASN1ObjectIdentifier curveOid = ECUtil.getNamedCurveOid(((ECNamedCurveSpec)ecSpec).getName());
if (curveOid == null) // guess it's the OID
{
curveOid = new ASN1ObjectIdentifier(((ECNamedCurveSpec)ecSpec).getName());
}
params = new X962Parameters(curveOid);
orderBitLength = ECUtil.getOrderBitLength(BouncyCastleProvider.CONFIGURATION, ecSpec.getOrder(), this.getS());
}
else if (ecSpec == null)
{
params = new X962Parameters(DERNull.INSTANCE);
orderBitLength = ECUtil.getOrderBitLength(BouncyCastleProvider.CONFIGURATION, null, this.getS());
}
else
{
ECCurve curve = EC5Util.convertCurve(ecSpec.getCurve());
X9ECParameters ecP = new X9ECParameters(
curve,
new X9ECPoint(EC5Util.convertPoint(curve, ecSpec.getGenerator()), withCompression),
ecSpec.getOrder(),
BigInteger.valueOf(ecSpec.getCofactor()),
ecSpec.getCurve().getSeed());
params = new X962Parameters(ecP);
orderBitLength = ECUtil.getOrderBitLength(BouncyCastleProvider.CONFIGURATION, ecSpec.getOrder(), this.getS());
}
PrivateKeyInfo info;
org.bouncycastle.asn1.sec.ECPrivateKey keyStructure;
if (publicKey != null)
{
keyStructure = new org.bouncycastle.asn1.sec.ECPrivateKey(orderBitLength, this.getS(), publicKey, params);
}
else
{
keyStructure = new org.bouncycastle.asn1.sec.ECPrivateKey(orderBitLength, this.getS(), params);
}
try
{
if (algorithm.equals("DSTU4145"))
{
info = new PrivateKeyInfo(new AlgorithmIdentifier(UAObjectIdentifiers.dstu4145be, params.toASN1Primitive()), keyStructure.toASN1Primitive());
}
else
{
info = new PrivateKeyInfo(new AlgorithmIdentifier(X9ObjectIdentifiers.id_ecPublicKey, params.toASN1Primitive()), keyStructure.toASN1Primitive());
}
return info.getEncoded(ASN1Encoding.DER);
}
catch (IOException e)
{
return null;
}
}
public ECParameterSpec getParams()
{
return ecSpec;
}
public org.bouncycastle.jce.spec.ECParameterSpec getParameters()
{
if (ecSpec == null)
{
return null;
}
return EC5Util.convertSpec(ecSpec);
}
org.bouncycastle.jce.spec.ECParameterSpec engineGetSpec()
{
if (ecSpec != null)
{
return EC5Util.convertSpec(ecSpec);
}
return BouncyCastleProvider.CONFIGURATION.getEcImplicitlyCa();
}
public BigInteger getS()
{
return d;
}
public BigInteger getD()
{
return d;
}
public void setBagAttribute(
ASN1ObjectIdentifier oid,
ASN1Encodable attribute)
{
attrCarrier.setBagAttribute(oid, attribute);
}
public ASN1Encodable getBagAttribute(
ASN1ObjectIdentifier oid)
{
return attrCarrier.getBagAttribute(oid);
}
public Enumeration getBagAttributeKeys()
{
return attrCarrier.getBagAttributeKeys();
}
public void setPointFormat(String style)
{
withCompression = !("UNCOMPRESSED".equalsIgnoreCase(style));
}
public boolean equals(Object o)
{
if (!(o instanceof BCDSTU4145PrivateKey))
{
return false;
}
BCDSTU4145PrivateKey other = (BCDSTU4145PrivateKey)o;
return getD().equals(other.getD()) && (engineGetSpec().equals(other.engineGetSpec()));
}
public int hashCode()
{
return getD().hashCode() ^ engineGetSpec().hashCode();
}
public String toString()
{
return ECUtil.privateKeyToString(algorithm, d, engineGetSpec());
}
private ASN1BitString getPublicKeyDetails(BCDSTU4145PublicKey pub)
{
try
{
SubjectPublicKeyInfo info = SubjectPublicKeyInfo.getInstance(ASN1Primitive.fromByteArray(pub.getEncoded()));
return info.getPublicKeyData();
}
catch (IOException e)
{ // should never happen
return null;
}
}
private void readObject(
ObjectInputStream in)
throws IOException, ClassNotFoundException
{
in.defaultReadObject();
byte[] enc = (byte[])in.readObject();
populateFromPrivKeyInfo(PrivateKeyInfo.getInstance(ASN1Primitive.fromByteArray(enc)));
this.attrCarrier = new PKCS12BagAttributeCarrierImpl();
}
private void writeObject(
ObjectOutputStream out)
throws IOException
{
out.defaultWriteObject();
out.writeObject(this.getEncoded());
}
}
© 2015 - 2024 Weber Informatics LLC | Privacy Policy