111 lines
2.6 KiB
C#
111 lines
2.6 KiB
C#
using System;
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namespace Org.BouncyCastle.Asn1.X509
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{
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public class AlgorithmIdentifier
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: Asn1Encodable
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{
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private readonly DerObjectIdentifier objectID;
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private readonly Asn1Encodable parameters;
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public static AlgorithmIdentifier GetInstance(
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Asn1TaggedObject obj,
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bool explicitly)
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{
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return GetInstance(Asn1Sequence.GetInstance(obj, explicitly));
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}
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public static AlgorithmIdentifier GetInstance(
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object obj)
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{
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if (obj == null || obj is AlgorithmIdentifier)
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{
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return (AlgorithmIdentifier) obj;
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}
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if (obj is DerObjectIdentifier)
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{
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return new AlgorithmIdentifier((DerObjectIdentifier) obj);
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}
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if (obj is string)
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{
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return new AlgorithmIdentifier((string) obj);
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}
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if (obj is Asn1Sequence)
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{
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return new AlgorithmIdentifier((Asn1Sequence) obj);
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}
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throw new ArgumentException("unknown object in factory: " + obj.GetType().Name, "obj");
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}
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public AlgorithmIdentifier(
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DerObjectIdentifier objectID)
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{
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this.objectID = objectID;
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}
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public AlgorithmIdentifier(
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string objectID)
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{
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this.objectID = new DerObjectIdentifier(objectID);
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}
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public AlgorithmIdentifier(
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DerObjectIdentifier objectID,
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Asn1Encodable parameters)
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{
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this.objectID = objectID;
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this.parameters = parameters;
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}
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internal AlgorithmIdentifier(
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Asn1Sequence seq)
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{
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if (seq.Count < 1 || seq.Count > 2)
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{
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throw new ArgumentException("Bad sequence size: " + seq.Count);
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}
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objectID = DerObjectIdentifier.GetInstance(seq[0]);
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if (seq.Count == 2)
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{
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parameters = seq[1];
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}
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}
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public virtual DerObjectIdentifier ObjectID
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{
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get { return objectID; }
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}
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public Asn1Encodable Parameters
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{
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get { return parameters; }
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}
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/**
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* Produce an object suitable for an Asn1OutputStream.
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* <pre>
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* AlgorithmIdentifier ::= Sequence {
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* algorithm OBJECT IDENTIFIER,
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* parameters ANY DEFINED BY algorithm OPTIONAL }
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* </pre>
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*/
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public override Asn1Object ToAsn1Object()
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{
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Asn1EncodableVector v = new Asn1EncodableVector(objectID);
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if (parameters != null)
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{
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v.Add(parameters);
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}
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return new DerSequence(v);
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}
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}
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}
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