SubjectDirectoryAttributes.cs :  » PDF » iTextSharp » Org » BouncyCastle » Asn1 » X509 » C# / CSharp Open Source

using System;
using System.Collections;

using Org.BouncyCastle.Utilities.Collections;

namespace Org.BouncyCastle.Asn1.X509{
  /**
   * This extension may contain further X.500 attributes of the subject. See also
   * RFC 3039.
   *
   * <pre>
   *     SubjectDirectoryAttributes ::= Attributes
   *     Attributes ::= SEQUENCE SIZE (1..MAX) OF Attribute
   *     Attribute ::= SEQUENCE
   *     {
   *       type AttributeType
   *       values SET OF AttributeValue
   *     }
   *
   *     AttributeType ::= OBJECT IDENTIFIER
   *     AttributeValue ::= ANY DEFINED BY AttributeType
   * </pre>
   *
   * @see org.bouncycastle.asn1.x509.X509Name for AttributeType ObjectIdentifiers.
   */
  public class SubjectDirectoryAttributes
    : Asn1Encodable
  {
    private readonly ArrayList attributes = new ArrayList();

    public static SubjectDirectoryAttributes GetInstance(
      object obj)
    {
      if (obj == null || obj is SubjectDirectoryAttributes)
      {
        return (SubjectDirectoryAttributes) obj;
      }

      if (obj is Asn1Sequence)
      {
        return new SubjectDirectoryAttributes((Asn1Sequence) obj);
      }

      throw new ArgumentException("unknown object in factory: " + obj.GetType().Name, "obj");
    }

    /**
     * Constructor from Asn1Sequence.
     *
     * The sequence is of type SubjectDirectoryAttributes:
     *
     * <pre>
     *      SubjectDirectoryAttributes ::= Attributes
     *      Attributes ::= SEQUENCE SIZE (1..MAX) OF Attribute
     *      Attribute ::= SEQUENCE
     *      {
     *        type AttributeType
     *        values SET OF AttributeValue
     *      }
     *
     *      AttributeType ::= OBJECT IDENTIFIER
     *      AttributeValue ::= ANY DEFINED BY AttributeType
     * </pre>
     *
     * @param seq
     *            The ASN.1 sequence.
     */
    private SubjectDirectoryAttributes(
      Asn1Sequence seq)
    {
      foreach (object o in seq)
      {
        Asn1Sequence s = Asn1Sequence.GetInstance(o);
        attributes.Add(AttributeX509.GetInstance(s));
      }
    }

    /**
     * Constructor from an ArrayList of attributes.
     *
     * The ArrayList consists of attributes of type {@link Attribute Attribute}
     *
     * @param attributes The attributes.
     *
     */
    public SubjectDirectoryAttributes(
      ArrayList attributes)
    {
      this.attributes.AddRange(attributes);
    }

    /**
     * Produce an object suitable for an Asn1OutputStream.
     *
     * Returns:
     *
     * <pre>
     *      SubjectDirectoryAttributes ::= Attributes
     *      Attributes ::= SEQUENCE SIZE (1..MAX) OF Attribute
     *      Attribute ::= SEQUENCE
     *      {
     *        type AttributeType
     *        values SET OF AttributeValue
     *      }
     *
     *      AttributeType ::= OBJECT IDENTIFIER
     *      AttributeValue ::= ANY DEFINED BY AttributeType
     * </pre>
     *
     * @return a DERObject
     */
    public override Asn1Object ToAsn1Object()
    {
      AttributeX509[] v = (AttributeX509[]) attributes.ToArray(typeof(AttributeX509));

      return new DerSequence(v);
    }

    /**
     * @return Returns the attributes.
     */
    public IEnumerable Attributes
    {
      get { return new EnumerableProxy(attributes); }
    }
  }
}