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using System;
using Org.BouncyCastle.Asn1;
using Org.BouncyCastle.Asn1.X509;
namespace Org.BouncyCastle.Asn1.Ocsp
{
public class Signature
: Asn1Encodable
{
internal AlgorithmIdentifier signatureAlgorithm;
internal DerBitString signatureValue;
internal Asn1Sequence certs;
public static Signature GetInstance(
Asn1TaggedObject obj,
bool explicitly)
{
return GetInstance(Asn1Sequence.GetInstance(obj, explicitly));
}
public static Signature GetInstance(
object obj)
{
if (obj == null || obj is Signature)
{
return (Signature)obj;
}
if (obj is Asn1Sequence)
{
return new Signature((Asn1Sequence)obj);
}
throw new ArgumentException("unknown object in factory: " + obj.GetType().Name, "obj");
}
public Signature(
AlgorithmIdentifier signatureAlgorithm,
DerBitString signatureValue)
: this(signatureAlgorithm, signatureValue, null)
{
}
public Signature(
AlgorithmIdentifier signatureAlgorithm,
DerBitString signatureValue,
Asn1Sequence certs)
{
if (signatureAlgorithm == null)
throw new ArgumentException("signatureAlgorithm");
if (signatureValue == null)
throw new ArgumentException("signatureValue");
this.signatureAlgorithm = signatureAlgorithm;
this.signatureValue = signatureValue;
this.certs = certs;
}
private Signature(
Asn1Sequence seq)
{
signatureAlgorithm = AlgorithmIdentifier.GetInstance(seq[0]);
signatureValue = (DerBitString)seq[1];
if (seq.Count == 3)
{
certs = Asn1Sequence.GetInstance(
(Asn1TaggedObject)seq[2], true);
}
}
public AlgorithmIdentifier SignatureAlgorithm
{
get { return signatureAlgorithm; }
}
public DerBitString SignatureValue
{
get { return signatureValue; }
}
public Asn1Sequence Certs
{
get { return certs; }
}
/**
* Produce an object suitable for an Asn1OutputStream.
* <pre>
* Signature ::= Sequence {
* signatureAlgorithm AlgorithmIdentifier,
* signature BIT STRING,
* certs [0] EXPLICIT Sequence OF Certificate OPTIONAL}
* </pre>
*/
public override Asn1Object ToAsn1Object()
{
Asn1EncodableVector v = new Asn1EncodableVector(
signatureAlgorithm, signatureValue);
if (certs != null)
{
v.Add(new DerTaggedObject(true, 0, certs));
}
return new DerSequence(v);
}
}
}
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