org.bouncycastle.pqc.jcajce.provider.xmss.BCXMSSPrivateKey Maven / Gradle / Ivy
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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.pqc.jcajce.provider.xmss;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.security.PrivateKey;
import org.bouncycastle.asn1.ASN1ObjectIdentifier;
import org.bouncycastle.asn1.ASN1Set;
import org.bouncycastle.asn1.pkcs.PrivateKeyInfo;
import org.bouncycastle.crypto.CipherParameters;
import org.bouncycastle.pqc.asn1.XMSSKeyParams;
import org.bouncycastle.pqc.crypto.util.PrivateKeyFactory;
import org.bouncycastle.pqc.crypto.util.PrivateKeyInfoFactory;
import org.bouncycastle.pqc.crypto.xmss.XMSSPrivateKeyParameters;
import org.bouncycastle.pqc.jcajce.interfaces.XMSSPrivateKey;
import org.bouncycastle.util.Arrays;
public class BCXMSSPrivateKey
implements PrivateKey, XMSSPrivateKey
{
private static final long serialVersionUID = 8568701712864512338L;
private transient XMSSPrivateKeyParameters keyParams;
private transient ASN1ObjectIdentifier treeDigest;
private transient ASN1Set attributes;
public BCXMSSPrivateKey(
ASN1ObjectIdentifier treeDigest,
XMSSPrivateKeyParameters keyParams)
{
this.treeDigest = treeDigest;
this.keyParams = keyParams;
}
public BCXMSSPrivateKey(PrivateKeyInfo keyInfo)
throws IOException
{
init(keyInfo);
}
private void init(PrivateKeyInfo keyInfo)
throws IOException
{
this.attributes = keyInfo.getAttributes();
XMSSKeyParams keyParams = XMSSKeyParams.getInstance(keyInfo.getPrivateKeyAlgorithm().getParameters());
this.treeDigest = keyParams.getTreeDigest().getAlgorithm();
this.keyParams = (XMSSPrivateKeyParameters)PrivateKeyFactory.createKey(keyInfo);
}
public long getUsagesRemaining()
{
return keyParams.getUsagesRemaining();
}
public XMSSPrivateKey extractKeyShard(int usageCount)
{
return new BCXMSSPrivateKey(this.treeDigest, keyParams.extractKeyShard(usageCount));
}
public String getAlgorithm()
{
return "XMSS";
}
public String getFormat()
{
return "PKCS#8";
}
public byte[] getEncoded()
{
try
{
PrivateKeyInfo pki = PrivateKeyInfoFactory.createPrivateKeyInfo(keyParams, attributes);
return pki.getEncoded();
}
catch (IOException e)
{
return null;
}
}
public boolean equals(Object o)
{
if (o == this)
{
return true;
}
if (o instanceof BCXMSSPrivateKey)
{
BCXMSSPrivateKey otherKey = (BCXMSSPrivateKey)o;
return treeDigest.equals(otherKey.treeDigest) && Arrays.areEqual(keyParams.toByteArray(), otherKey.keyParams.toByteArray());
}
return false;
}
public int hashCode()
{
return treeDigest.hashCode() + 37 * Arrays.hashCode(keyParams.toByteArray());
}
CipherParameters getKeyParams()
{
return keyParams;
}
ASN1ObjectIdentifier getTreeDigestOID()
{
return treeDigest;
}
public int getHeight()
{
return keyParams.getParameters().getHeight();
}
public String getTreeDigest()
{
return DigestUtil.getXMSSDigestName(treeDigest);
}
private void readObject(
ObjectInputStream in)
throws IOException, ClassNotFoundException
{
in.defaultReadObject();
byte[] enc = (byte[])in.readObject();
init(PrivateKeyInfo.getInstance(enc));
}
private void writeObject(
ObjectOutputStream out)
throws IOException
{
out.defaultWriteObject();
out.writeObject(this.getEncoded());
}
}
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