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using System;
using System.IO;
namespace Org.BouncyCastle.Asn1.X509
{
/**
* The object that contains the public key stored in a certficate.
* <p>
* The GetEncoded() method in the public keys in the JCE produces a DER
* encoded one of these.</p>
*/
public class SubjectPublicKeyInfo
: Asn1Encodable
{
private readonly AlgorithmIdentifier algID;
private readonly DerBitString keyData;
public static SubjectPublicKeyInfo GetInstance(
Asn1TaggedObject obj,
bool explicitly)
{
return GetInstance(Asn1Sequence.GetInstance(obj, explicitly));
}
public static SubjectPublicKeyInfo GetInstance(
object obj)
{
if (obj is SubjectPublicKeyInfo)
return (SubjectPublicKeyInfo) obj;
if (obj != null)
return new SubjectPublicKeyInfo(Asn1Sequence.GetInstance(obj));
return null;
}
public SubjectPublicKeyInfo(
AlgorithmIdentifier algID,
Asn1Encodable publicKey)
{
this.keyData = new DerBitString(publicKey);
this.algID = algID;
}
public SubjectPublicKeyInfo(
AlgorithmIdentifier algID,
byte[] publicKey)
{
this.keyData = new DerBitString(publicKey);
this.algID = algID;
}
private SubjectPublicKeyInfo(
Asn1Sequence seq)
{
if (seq.Count != 2)
throw new ArgumentException("Bad sequence size: " + seq.Count, "seq");
this.algID = AlgorithmIdentifier.GetInstance(seq[0]);
this.keyData = DerBitString.GetInstance(seq[1]);
}
public AlgorithmIdentifier AlgorithmID
{
get { return algID; }
}
/**
* for when the public key is an encoded object - if the bitstring
* can't be decoded this routine raises an IOException.
*
* @exception IOException - if the bit string doesn't represent a Der
* encoded object.
*/
public Asn1Object ParsePublicKey()
{
return Asn1Object.FromByteArray(keyData.GetOctets());
}
/**
* for when the public key is raw bits...
*/
public DerBitString PublicKeyData
{
get { return keyData; }
}
/**
* Produce an object suitable for an Asn1OutputStream.
* <pre>
* SubjectPublicKeyInfo ::= Sequence {
* algorithm AlgorithmIdentifier,
* publicKey BIT STRING }
* </pre>
*/
public override Asn1Object ToAsn1Object()
{
return new DerSequence(algID, keyData);
}
}
}
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