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

using System;
using System.Collections;

using Org.BouncyCastle.Asn1.X500;

namespace Org.BouncyCastle.Asn1.IsisMtt.X509{
  /**
  * Names of authorities which are responsible for the administration of title
  * registers.
  * 
  * <pre>
  *             NamingAuthority ::= SEQUENCE 
  *             {
  *               namingAuthorityID OBJECT IDENTIFIER OPTIONAL,
  *               namingAuthorityUrl IA5String OPTIONAL,
  *               namingAuthorityText DirectoryString(SIZE(1..128)) OPTIONAL
  *             }
  * </pre>
  * @see Org.BouncyCastle.Asn1.IsisMtt.X509.AdmissionSyntax
  * 
  */
  public class NamingAuthority
    : Asn1Encodable
  {
    /**
    * Profession OIDs should always be defined under the OID branch of the
    * responsible naming authority. At the time of this writing, the work group
    * Recht, Wirtschaft, Steuern (Law, Economy, Taxes) is registered as the
    * first naming authority under the OID id-isismtt-at-namingAuthorities.
    */
    public static readonly DerObjectIdentifier IdIsisMttATNamingAuthoritiesRechtWirtschaftSteuern
      = new DerObjectIdentifier(IsisMttObjectIdentifiers.IdIsisMttATNamingAuthorities + ".1");

    private readonly DerObjectIdentifier  namingAuthorityID;
    private readonly string          namingAuthorityUrl;
    private readonly DirectoryString    namingAuthorityText;

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

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

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

    public static NamingAuthority GetInstance(
      Asn1TaggedObject  obj,
      bool        isExplicit)
    {
      return GetInstance(Asn1Sequence.GetInstance(obj, isExplicit));
    }

    /**
    * Constructor from Asn1Sequence.
    * <p/>
    * <p/>
    * <pre>
    *             NamingAuthority ::= SEQUENCE
    *             {
    *               namingAuthorityID OBJECT IDENTIFIER OPTIONAL,
    *               namingAuthorityUrl IA5String OPTIONAL,
    *               namingAuthorityText DirectoryString(SIZE(1..128)) OPTIONAL
    *             }
    * </pre>
    *
    * @param seq The ASN.1 sequence.
    */
    private NamingAuthority(
      Asn1Sequence seq)
    {
      if (seq.Count > 3)
        throw new ArgumentException("Bad sequence size: " + seq.Count);

      IEnumerator e = seq.GetEnumerator();

      if (e.MoveNext())
      {
        Asn1Encodable o = (Asn1Encodable) e.Current;
        if (o is DerObjectIdentifier)
        {
          namingAuthorityID = (DerObjectIdentifier) o;
        }
        else if (o is DerIA5String)
        {
          namingAuthorityUrl = DerIA5String.GetInstance(o).GetString();
        }
        else if (o is IAsn1String)
        {
          namingAuthorityText = DirectoryString.GetInstance(o);
        }
        else
        {
          throw new ArgumentException("Bad object encountered: " + o.GetType().Name);
        }
      }

      if (e.MoveNext())
      {
        Asn1Encodable o = (Asn1Encodable) e.Current;
        if (o is DerIA5String)
        {
          namingAuthorityUrl = DerIA5String.GetInstance(o).GetString();
        }
        else if (o is IAsn1String)
        {
          namingAuthorityText = DirectoryString.GetInstance(o);
        }
        else
        {
          throw new ArgumentException("Bad object encountered: " + o.GetType().Name);
        }
      }

      if (e.MoveNext())
      {
        Asn1Encodable o = (Asn1Encodable) e.Current;
        if (o is IAsn1String)
        {
          namingAuthorityText = DirectoryString.GetInstance(o);
        }
        else
        {
          throw new ArgumentException("Bad object encountered: " + o.GetType().Name);
        }
      }
    }

    /**
    * @return Returns the namingAuthorityID.
    */
    public virtual DerObjectIdentifier NamingAuthorityID
    {
      get { return namingAuthorityID; }
    }

    /**
    * @return Returns the namingAuthorityText.
    */
    public virtual DirectoryString NamingAuthorityText
    {
      get { return namingAuthorityText; }
    }

    /**
    * @return Returns the namingAuthorityUrl.
    */
    public virtual string NamingAuthorityUrl
    {
      get { return namingAuthorityUrl; }
    }

    /**
    * Constructor from given details.
    * <p/>
    * All parameters can be combined.
    *
    * @param namingAuthorityID   ObjectIdentifier for naming authority.
    * @param namingAuthorityUrl  URL for naming authority.
    * @param namingAuthorityText Textual representation of naming authority.
    */
    public NamingAuthority(
      DerObjectIdentifier  namingAuthorityID,
      string        namingAuthorityUrl,
      DirectoryString    namingAuthorityText)
    {
      this.namingAuthorityID = namingAuthorityID;
      this.namingAuthorityUrl = namingAuthorityUrl;
      this.namingAuthorityText = namingAuthorityText;
    }

    /**
    * Produce an object suitable for an Asn1OutputStream.
    * <p/>
    * Returns:
    * <p/>
    * <pre>
    *             NamingAuthority ::= SEQUENCE
    *             {
    *               namingAuthorityID OBJECT IDENTIFIER OPTIONAL,
    *               namingAuthorityUrl IA5String OPTIONAL,
    *               namingAuthorityText DirectoryString(SIZE(1..128)) OPTIONAL
    *             }
    * </pre>
    *
    * @return an Asn1Object
    */
    public override Asn1Object ToAsn1Object()
    {
      Asn1EncodableVector vec = new Asn1EncodableVector();
      if (namingAuthorityID != null)
      {
        vec.Add(namingAuthorityID);
      }
      if (namingAuthorityUrl != null)
      {
        vec.Add(new DerIA5String(namingAuthorityUrl, true));
      }
      if (namingAuthorityText != null)
      {
        vec.Add(namingAuthorityText);
      }
      return new DerSequence(vec);
    }
  }
}