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using System;
using System.Collections;
using System.IO;
using Org.BouncyCastle.Asn1.X509;
using Org.BouncyCastle.Math;
namespace Org.BouncyCastle.Asn1.Pkcs
{
public class PrivateKeyInfo
: Asn1Encodable
{
private readonly Asn1OctetString privKey;
private readonly AlgorithmIdentifier algID;
private readonly Asn1Set attributes;
public static PrivateKeyInfo GetInstance(Asn1TaggedObject obj, bool explicitly)
{
return GetInstance(Asn1Sequence.GetInstance(obj, explicitly));
}
public static PrivateKeyInfo GetInstance(
object obj)
{
if (obj == null)
return null;
if (obj is PrivateKeyInfo)
return (PrivateKeyInfo) obj;
return new PrivateKeyInfo(Asn1Sequence.GetInstance(obj));
}
public PrivateKeyInfo(AlgorithmIdentifier algID, Asn1Object privateKey)
: this(algID, privateKey, null)
{
}
public PrivateKeyInfo(
AlgorithmIdentifier algID,
Asn1Object privateKey,
Asn1Set attributes)
{
this.algID = algID;
this.privKey = new DerOctetString(privateKey.GetEncoded(Asn1Encodable.Der));
this.attributes = attributes;
}
private PrivateKeyInfo(Asn1Sequence seq)
{
IEnumerator e = seq.GetEnumerator();
e.MoveNext();
BigInteger version = ((DerInteger)e.Current).Value;
if (version.IntValue != 0)
{
throw new ArgumentException("wrong version for private key info: " + version.IntValue);
}
e.MoveNext();
algID = AlgorithmIdentifier.GetInstance(e.Current);
e.MoveNext();
privKey = Asn1OctetString.GetInstance(e.Current);
if (e.MoveNext())
{
attributes = Asn1Set.GetInstance((Asn1TaggedObject)e.Current, false);
}
}
public virtual AlgorithmIdentifier PrivateKeyAlgorithm
{
get { return algID; }
}
[Obsolete("Use 'PrivateKeyAlgorithm' property instead")]
public virtual AlgorithmIdentifier AlgorithmID
{
get { return algID; }
}
public virtual Asn1Object ParsePrivateKey()
{
return Asn1Object.FromByteArray(privKey.GetOctets());
}
[Obsolete("Use 'ParsePrivateKey' instead")]
public virtual Asn1Object PrivateKey
{
get
{
try
{
return ParsePrivateKey();
}
catch (IOException)
{
throw new InvalidOperationException("unable to parse private key");
}
}
}
public virtual Asn1Set Attributes
{
get { 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 Attr
* </pre>
*/
public override Asn1Object ToAsn1Object()
{
Asn1EncodableVector v = new Asn1EncodableVector(new DerInteger(0), algID, privKey);
if (attributes != null)
{
v.Add(new DerTaggedObject(false, 0, attributes));
}
return new DerSequence(v);
}
}
}
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