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using System;
using System.Collections;
using Org.BouncyCastle.Utilities;
namespace Org.BouncyCastle.Asn1.X509
{
/// <remarks>Generator for X.509 extensions</remarks>
public class X509ExtensionsGenerator
{
private IDictionary extensions = Platform.CreateHashtable();
private IList extOrdering = Platform.CreateArrayList();
/// <summary>Reset the generator</summary>
public void Reset()
{
extensions = Platform.CreateHashtable();
extOrdering = Platform.CreateArrayList();
}
/// <summary>
/// Add an extension with the given oid and the passed in value to be included
/// in the OCTET STRING associated with the extension.
/// </summary>
/// <param name="oid">OID for the extension.</param>
/// <param name="critical">True if critical, false otherwise.</param>
/// <param name="extValue">The ASN.1 object to be included in the extension.</param>
public void AddExtension(
DerObjectIdentifier oid,
bool critical,
Asn1Encodable extValue)
{
byte[] encoded;
try
{
encoded = extValue.GetDerEncoded();
}
catch (Exception e)
{
throw new ArgumentException("error encoding value: " + e);
}
this.AddExtension(oid, critical, encoded);
}
/// <summary>
/// Add an extension with the given oid and the passed in byte array to be wrapped
/// in the OCTET STRING associated with the extension.
/// </summary>
/// <param name="oid">OID for the extension.</param>
/// <param name="critical">True if critical, false otherwise.</param>
/// <param name="extValue">The byte array to be wrapped.</param>
public void AddExtension(
DerObjectIdentifier oid,
bool critical,
byte[] extValue)
{
if (extensions.Contains(oid))
{
throw new ArgumentException("extension " + oid + " already added");
}
extOrdering.Add(oid);
extensions.Add(oid, new X509Extension(critical, new DerOctetString(extValue)));
}
/// <summary>Return true if there are no extension present in this generator.</summary>
/// <returns>True if empty, false otherwise</returns>
public bool IsEmpty
{
get { return extOrdering.Count < 1; }
}
/// <summary>Generate an X509Extensions object based on the current state of the generator.</summary>
/// <returns>An <c>X509Extensions</c> object</returns>
public X509Extensions Generate()
{
return new X509Extensions(extOrdering, extensions);
}
}
}
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