package org.bouncycastle.asn1.pkcs;
import org.bouncycastle.asn1.ASN1Encodable;
import org.bouncycastle.asn1.ASN1EncodableVector;
import org.bouncycastle.asn1.ASN1InputStream;
import org.bouncycastle.asn1.ASN1OctetString;
import org.bouncycastle.asn1.ASN1Sequence;
import org.bouncycastle.asn1.ASN1Set;
import org.bouncycastle.asn1.ASN1TaggedObject;
import org.bouncycastle.asn1.DERInteger;
import org.bouncycastle.asn1.DERObject;
import org.bouncycastle.asn1.DEROctetString;
import org.bouncycastle.asn1.DERSequence;
import org.bouncycastle.asn1.DERTaggedObject;
import org.bouncycastle.asn1.x509.AlgorithmIdentifier;
import java.io.IOException;
import java.math.BigInteger;
import java.util.Enumeration;
public class PrivateKeyInfo
extends ASN1Encodable
{
private DERObject privKey;
private AlgorithmIdentifier algId;
private ASN1Set attributes;
public static PrivateKeyInfo getInstance(
ASN1TaggedObject obj,
boolean explicit)
{
return getInstance(ASN1Sequence.getInstance(obj, explicit));
}
public static PrivateKeyInfo getInstance(
Object obj)
{
if (obj instanceof PrivateKeyInfo)
{
return (PrivateKeyInfo)obj;
}
else if (obj instanceof ASN1Sequence)
{
return new PrivateKeyInfo((ASN1Sequence)obj);
}
throw new IllegalArgumentException("unknown object in factory: " + obj.getClass().getName());
}
public PrivateKeyInfo(
AlgorithmIdentifier algId,
DERObject privateKey)
{
this(algId, privateKey, null);
}
public PrivateKeyInfo(
AlgorithmIdentifier algId,
DERObject privateKey,
ASN1Set attributes)
{
this.privKey = privateKey;
this.algId = algId;
this.attributes = attributes;
}
public PrivateKeyInfo(
ASN1Sequence seq)
{
Enumeration e = seq.getObjects();
BigInteger version = ((DERInteger)e.nextElement()).getValue();
if (version.intValue() != 0)
{
throw new IllegalArgumentException("wrong version for private key info");
}
algId = new AlgorithmIdentifier((ASN1Sequence)e.nextElement());
try
{
ASN1InputStream aIn = new ASN1InputStream(((ASN1OctetString)e.nextElement()).getOctets());
privKey = aIn.readObject();
}
catch (IOException ex)
{
throw new IllegalArgumentException("Error recoverying private key from sequence");
}
if (e.hasMoreElements())
{
attributes = ASN1Set.getInstance((ASN1TaggedObject)e.nextElement(), false);
}
}
public AlgorithmIdentifier getAlgorithmId()
{
return algId;
}
public DERObject getPrivateKey()
{
return privKey;
}
public ASN1Set getAttributes()
{
return attributes;
}
/**
* write out an RSA private key with it's asscociated information
* as described in PKCS8.
* <pre>
* PrivateKeyInfo ::= SEQUENCE {
* version Version,
* privateKeyAlgorithm AlgorithmIdentifier {{PrivateKeyAlgorithms}},
* privateKey PrivateKey,
* attributes [0] IMPLICIT Attributes OPTIONAL
* }
* Version ::= INTEGER {v1(0)} (v1,...)
*
* PrivateKey ::= OCTET STRING
*
* Attributes ::= SET OF Attribute
* </pre>
*/
public DERObject toASN1Object()
{
ASN1EncodableVector v = new ASN1EncodableVector();
v.add(new DERInteger(0));
v.add(algId);
v.add(new DEROctetString(privKey));
if (attributes != null)
{
v.add(new DERTaggedObject(false, 0, attributes));
}
return new DERSequence(v);
}
}