package org.bouncycastle.asn1.pkcs;
import java.io.IOException;
import java.math.BigInteger;
import java.util.Enumeration;
import org.bouncycastle.asn1.ASN1Encodable;
import org.bouncycastle.asn1.ASN1EncodableVector;
import org.bouncycastle.asn1.ASN1Encoding;
import org.bouncycastle.asn1.ASN1Integer;
import org.bouncycastle.asn1.ASN1Object;
import org.bouncycastle.asn1.ASN1OctetString;
import org.bouncycastle.asn1.ASN1Primitive;
import org.bouncycastle.asn1.ASN1Sequence;
import org.bouncycastle.asn1.ASN1Set;
import org.bouncycastle.asn1.ASN1TaggedObject;
import org.bouncycastle.asn1.DEROctetString;
import org.bouncycastle.asn1.DERSequence;
import org.bouncycastle.asn1.DERTaggedObject;
import org.bouncycastle.asn1.x509.AlgorithmIdentifier;
public class PrivateKeyInfo
extends ASN1Object
{
private ASN1OctetString 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 != null)
{
return new PrivateKeyInfo(ASN1Sequence.getInstance(obj));
}
return null;
}
public PrivateKeyInfo(
AlgorithmIdentifier algId,
ASN1Encodable privateKey)
throws IOException
{
this(algId, privateKey, null);
}
public PrivateKeyInfo(
AlgorithmIdentifier algId,
ASN1Encodable privateKey,
ASN1Set attributes)
throws IOException
{
this.privKey = new DEROctetString(privateKey.toASN1Primitive().getEncoded(ASN1Encoding.DER));
this.algId = algId;
this.attributes = attributes;
}
/**
* @deprectaed use PrivateKeyInfo.getInstance()
* @param seq
*/
public PrivateKeyInfo(
ASN1Sequence seq)
{
Enumeration e = seq.getObjects();
BigInteger version = ((ASN1Integer)e.nextElement()).getValue();
if (version.intValue() != 0)
{
throw new IllegalArgumentException("wrong version for private key info");
}
algId = AlgorithmIdentifier.getInstance(e.nextElement());
privKey = ASN1OctetString.getInstance(e.nextElement());
if (e.hasMoreElements())
{
attributes = ASN1Set.getInstance((ASN1TaggedObject)e.nextElement(), false);
}
}
public AlgorithmIdentifier getPrivateKeyAlgorithm()
{
return algId;
}
/**
* @deprecated use getPrivateKeyAlgorithm()
*/
public AlgorithmIdentifier getAlgorithmId()
{
return algId;
}
public ASN1Encodable parsePrivateKey()
throws IOException
{
return ASN1Primitive.fromByteArray(privKey.getOctets());
}
/**
* @deprecated use parsePrivateKey()
*/
public ASN1Primitive getPrivateKey()
{
try
{
return parsePrivateKey().toASN1Primitive();
}
catch (IOException e)
{
throw new IllegalStateException("unable to parse private key");
}
}
public ASN1Set getAttributes()
{
return attributes;
}
/**
* write out an RSA private key with its associated 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 ASN1Primitive toASN1Primitive()
{
ASN1EncodableVector v = new ASN1EncodableVector();
v.add(new ASN1Integer(0));
v.add(algId);
v.add(privKey);
if (attributes != null)
{
v.add(new DERTaggedObject(false, 0, attributes));
}
return new DERSequence(v);
}
}