124 lines
2.8 KiB
C#
124 lines
2.8 KiB
C#
using System;
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namespace Org.BouncyCastle.Asn1.X509
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{
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/**
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* Target information extension for attributes certificates according to RFC
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* 3281.
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*
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* <pre>
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* SEQUENCE OF Targets
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* </pre>
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*
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*/
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public class TargetInformation
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: Asn1Encodable
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{
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private readonly Asn1Sequence targets;
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/**
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* Creates an instance of a TargetInformation from the given object.
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* <p>
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* <code>obj</code> can be a TargetInformation or a {@link Asn1Sequence}</p>
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*
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* @param obj The object.
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* @return A TargetInformation instance.
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* @throws ArgumentException if the given object cannot be interpreted as TargetInformation.
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*/
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public static TargetInformation GetInstance(
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object obj)
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{
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if (obj is TargetInformation)
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{
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return (TargetInformation) obj;
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}
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if (obj is Asn1Sequence)
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{
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return new TargetInformation((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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/**
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* Constructor from a Asn1Sequence.
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*
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* @param seq The Asn1Sequence.
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* @throws ArgumentException if the sequence does not contain
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* correctly encoded Targets elements.
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*/
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private TargetInformation(
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Asn1Sequence targets)
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{
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this.targets = targets;
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}
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/**
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* Returns the targets in this target information extension.
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* <p>
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* The ArrayList is cloned before it is returned.</p>
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*
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* @return Returns the targets.
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*/
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public virtual Targets[] GetTargetsObjects()
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{
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Targets[] result = new Targets[targets.Count];
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for (int i = 0; i < targets.Count; ++i)
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{
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result[i] = Targets.GetInstance(targets[i]);
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}
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return result;
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}
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/**
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* Constructs a target information from a single targets element.
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* According to RFC 3281 only one targets element must be produced.
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*
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* @param targets A Targets instance.
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*/
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public TargetInformation(
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Targets targets)
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{
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this.targets = new DerSequence(targets);
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}
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/**
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* According to RFC 3281 only one targets element must be produced. If
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* multiple targets are given they must be merged in
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* into one targets element.
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*
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* @param targets An array with {@link Targets}.
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*/
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public TargetInformation(
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Target[] targets)
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: this(new Targets(targets))
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{
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}
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/**
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* Produce an object suitable for an Asn1OutputStream.
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*
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* Returns:
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*
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* <pre>
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* SEQUENCE OF Targets
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* </pre>
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*
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* <p>
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* According to RFC 3281 only one targets element must be produced. If
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* multiple targets are given in the constructor they are merged into one
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* targets element. If this was produced from a
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* {@link Org.BouncyCastle.Asn1.Asn1Sequence} the encoding is kept.</p>
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*
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* @return an Asn1Object
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*/
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public override Asn1Object ToAsn1Object()
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{
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return targets;
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}
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}
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}
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